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authorJeff Garzik <jgarzik@pobox.com>2005-09-21 22:34:08 -0400
committerJeff Garzik <jgarzik@pobox.com>2005-09-21 22:34:08 -0400
commita3536c839f04682ed06c84a7f75968c27c6108c8 (patch)
tree92c26ea74c0ffb9b83a2285ad2539cc271b09856 /net
parenta33a1982012e9070736e3717231714dc9892303b (diff)
parentefb0372bbaf5b829ff8c39db372779928af542a7 (diff)
downloadop-kernel-dev-a3536c839f04682ed06c84a7f75968c27c6108c8.zip
op-kernel-dev-a3536c839f04682ed06c84a7f75968c27c6108c8.tar.gz
Merge /spare/repo/linux-2.6/
Diffstat (limited to 'net')
-rw-r--r--net/8021q/vlan_dev.c2
-rw-r--r--net/Kconfig3
-rw-r--r--net/bridge/br_netfilter.c8
-rw-r--r--net/dccp/Makefile2
-rw-r--r--net/dccp/ackvec.c419
-rw-r--r--net/dccp/ackvec.h133
-rw-r--r--net/dccp/ccid.h31
-rw-r--r--net/dccp/ccids/ccid3.c56
-rw-r--r--net/dccp/ccids/ccid3.h23
-rw-r--r--net/dccp/dccp.h91
-rw-r--r--net/dccp/input.c89
-rw-r--r--net/dccp/ipv4.c101
-rw-r--r--net/dccp/minisocks.c19
-rw-r--r--net/dccp/options.c443
-rw-r--r--net/dccp/output.c26
-rw-r--r--net/dccp/proto.c94
-rw-r--r--net/ipv4/fib_trie.c49
-rw-r--r--net/ipv4/igmp.c2
-rw-r--r--net/ipv4/ipvs/ip_vs_conn.c43
-rw-r--r--net/ipv4/ipvs/ip_vs_core.c16
-rw-r--r--net/ipv4/ipvs/ip_vs_sync.c20
-rw-r--r--net/ipv4/netfilter/Kconfig36
-rw-r--r--net/ipv4/netfilter/Makefile5
-rw-r--r--net/ipv4/netfilter/ip_conntrack_core.c7
-rw-r--r--net/ipv4/netfilter/ip_conntrack_helper_pptp.c805
-rw-r--r--net/ipv4/netfilter/ip_conntrack_netlink.c4
-rw-r--r--net/ipv4/netfilter/ip_conntrack_proto_gre.c327
-rw-r--r--net/ipv4/netfilter/ip_conntrack_standalone.c4
-rw-r--r--net/ipv4/netfilter/ip_nat_core.c2
-rw-r--r--net/ipv4/netfilter/ip_nat_helper_pptp.c401
-rw-r--r--net/ipv4/netfilter/ip_nat_proto_gre.c214
-rw-r--r--net/ipv4/netfilter/ipt_CLUSTERIP.c223
-rw-r--r--net/ipv4/raw.c2
-rw-r--r--net/ipv4/tcp_input.c16
-rw-r--r--net/ipv4/tcp_minisocks.c2
-rw-r--r--net/ipv4/tcp_output.c12
-rw-r--r--net/ipv6/mcast.c2
-rw-r--r--net/ipv6/netfilter/ip6_tables.c52
-rw-r--r--net/ipv6/netfilter/ip6t_ah.c81
-rw-r--r--net/ipv6/netfilter/ip6t_dst.c88
-rw-r--r--net/ipv6/netfilter/ip6t_esp.c73
-rw-r--r--net/ipv6/netfilter/ip6t_frag.c90
-rw-r--r--net/ipv6/netfilter/ip6t_hbh.c88
-rw-r--r--net/ipv6/netfilter/ip6t_rt.c83
-rw-r--r--net/ipv6/raw.c2
-rw-r--r--net/ipv6/udp.c15
-rw-r--r--net/packet/af_packet.c65
-rw-r--r--net/socket.c3
48 files changed, 3037 insertions, 1335 deletions
diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c
index 145f5cd..b748648 100644
--- a/net/8021q/vlan_dev.c
+++ b/net/8021q/vlan_dev.c
@@ -120,7 +120,7 @@ int vlan_skb_recv(struct sk_buff *skb, struct net_device *dev,
unsigned short vid;
struct net_device_stats *stats;
unsigned short vlan_TCI;
- unsigned short proto;
+ __be16 proto;
/* vlan_TCI = ntohs(get_unaligned(&vhdr->h_vlan_TCI)); */
vlan_TCI = ntohs(vhdr->h_vlan_TCI);
diff --git a/net/Kconfig b/net/Kconfig
index 2bdd562..60f6f32 100644
--- a/net/Kconfig
+++ b/net/Kconfig
@@ -140,6 +140,7 @@ config BRIDGE_NETFILTER
If unsure, say N.
+source "net/netfilter/Kconfig"
source "net/ipv4/netfilter/Kconfig"
source "net/ipv6/netfilter/Kconfig"
source "net/decnet/netfilter/Kconfig"
@@ -206,8 +207,6 @@ config NET_PKTGEN
To compile this code as a module, choose M here: the
module will be called pktgen.
-source "net/netfilter/Kconfig"
-
endmenu
endmenu
diff --git a/net/bridge/br_netfilter.c b/net/bridge/br_netfilter.c
index 2d52fee..d8e36b7 100644
--- a/net/bridge/br_netfilter.c
+++ b/net/bridge/br_netfilter.c
@@ -214,9 +214,11 @@ static int br_nf_pre_routing_finish(struct sk_buff *skb)
.tos = RT_TOS(iph->tos)} }, .proto = 0};
if (!ip_route_output_key(&rt, &fl)) {
- /* Bridged-and-DNAT'ed traffic doesn't
- * require ip_forwarding. */
- if (((struct dst_entry *)rt)->dev == dev) {
+ /* - Bridged-and-DNAT'ed traffic doesn't
+ * require ip_forwarding.
+ * - Deal with redirected traffic. */
+ if (((struct dst_entry *)rt)->dev == dev ||
+ rt->rt_type == RTN_LOCAL) {
skb->dst = (struct dst_entry *)rt;
goto bridged_dnat;
}
diff --git a/net/dccp/Makefile b/net/dccp/Makefile
index fb97bb0..344a8da 100644
--- a/net/dccp/Makefile
+++ b/net/dccp/Makefile
@@ -3,6 +3,8 @@ obj-$(CONFIG_IP_DCCP) += dccp.o
dccp-y := ccid.o input.o ipv4.o minisocks.o options.o output.o proto.o \
timer.o
+dccp-$(CONFIG_IP_DCCP_ACKVEC) += ackvec.o
+
obj-$(CONFIG_INET_DCCP_DIAG) += dccp_diag.o
dccp_diag-y := diag.o
diff --git a/net/dccp/ackvec.c b/net/dccp/ackvec.c
new file mode 100644
index 0000000..6530283
--- /dev/null
+++ b/net/dccp/ackvec.c
@@ -0,0 +1,419 @@
+/*
+ * net/dccp/ackvec.c
+ *
+ * An implementation of the DCCP protocol
+ * Copyright (c) 2005 Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; version 2 of the License;
+ */
+
+#include "ackvec.h"
+#include "dccp.h"
+
+#include <linux/dccp.h>
+#include <linux/skbuff.h>
+
+#include <net/sock.h>
+
+int dccp_insert_option_ackvec(struct sock *sk, struct sk_buff *skb)
+{
+ struct dccp_sock *dp = dccp_sk(sk);
+ struct dccp_ackvec *av = dp->dccps_hc_rx_ackvec;
+ int len = av->dccpav_vec_len + 2;
+ struct timeval now;
+ u32 elapsed_time;
+ unsigned char *to, *from;
+
+ dccp_timestamp(sk, &now);
+ elapsed_time = timeval_delta(&now, &av->dccpav_time) / 10;
+
+ if (elapsed_time != 0)
+ dccp_insert_option_elapsed_time(sk, skb, elapsed_time);
+
+ if (DCCP_SKB_CB(skb)->dccpd_opt_len + len > DCCP_MAX_OPT_LEN)
+ return -1;
+
+ /*
+ * XXX: now we have just one ack vector sent record, so
+ * we have to wait for it to be cleared.
+ *
+ * Of course this is not acceptable, but this is just for
+ * basic testing now.
+ */
+ if (av->dccpav_ack_seqno != DCCP_MAX_SEQNO + 1)
+ return -1;
+
+ DCCP_SKB_CB(skb)->dccpd_opt_len += len;
+
+ to = skb_push(skb, len);
+ *to++ = DCCPO_ACK_VECTOR_0;
+ *to++ = len;
+
+ len = av->dccpav_vec_len;
+ from = av->dccpav_buf + av->dccpav_buf_head;
+
+ /* Check if buf_head wraps */
+ if (av->dccpav_buf_head + len > av->dccpav_vec_len) {
+ const u32 tailsize = (av->dccpav_vec_len - av->dccpav_buf_head);
+
+ memcpy(to, from, tailsize);
+ to += tailsize;
+ len -= tailsize;
+ from = av->dccpav_buf;
+ }
+
+ memcpy(to, from, len);
+ /*
+ * From draft-ietf-dccp-spec-11.txt:
+ *
+ * For each acknowledgement it sends, the HC-Receiver will add an
+ * acknowledgement record. ack_seqno will equal the HC-Receiver
+ * sequence number it used for the ack packet; ack_ptr will equal
+ * buf_head; ack_ackno will equal buf_ackno; and ack_nonce will
+ * equal buf_nonce.
+ *
+ * This implemention uses just one ack record for now.
+ */
+ av->dccpav_ack_seqno = DCCP_SKB_CB(skb)->dccpd_seq;
+ av->dccpav_ack_ptr = av->dccpav_buf_head;
+ av->dccpav_ack_ackno = av->dccpav_buf_ackno;
+ av->dccpav_ack_nonce = av->dccpav_buf_nonce;
+ av->dccpav_sent_len = av->dccpav_vec_len;
+
+ dccp_pr_debug("%sACK Vector 0, len=%d, ack_seqno=%llu, "
+ "ack_ackno=%llu\n",
+ debug_prefix, av->dccpav_sent_len,
+ (unsigned long long)av->dccpav_ack_seqno,
+ (unsigned long long)av->dccpav_ack_ackno);
+ return -1;
+}
+
+struct dccp_ackvec *dccp_ackvec_alloc(const unsigned int len,
+ const unsigned int __nocast priority)
+{
+ struct dccp_ackvec *av = kmalloc(sizeof(*av) + len, priority);
+
+ if (av != NULL) {
+ av->dccpav_buf_len = len;
+ av->dccpav_buf_head =
+ av->dccpav_buf_tail = av->dccpav_buf_len - 1;
+ av->dccpav_buf_ackno =
+ av->dccpav_ack_ackno = av->dccpav_ack_seqno = ~0LLU;
+ av->dccpav_buf_nonce = av->dccpav_buf_nonce = 0;
+ av->dccpav_ack_ptr = 0;
+ av->dccpav_time.tv_sec = 0;
+ av->dccpav_time.tv_usec = 0;
+ av->dccpav_sent_len = av->dccpav_vec_len = 0;
+ }
+
+ return av;
+}
+
+void dccp_ackvec_free(struct dccp_ackvec *av)
+{
+ kfree(av);
+}
+
+static inline u8 dccp_ackvec_state(const struct dccp_ackvec *av,
+ const unsigned int index)
+{
+ return av->dccpav_buf[index] & DCCP_ACKVEC_STATE_MASK;
+}
+
+static inline u8 dccp_ackvec_len(const struct dccp_ackvec *av,
+ const unsigned int index)
+{
+ return av->dccpav_buf[index] & DCCP_ACKVEC_LEN_MASK;
+}
+
+/*
+ * If several packets are missing, the HC-Receiver may prefer to enter multiple
+ * bytes with run length 0, rather than a single byte with a larger run length;
+ * this simplifies table updates if one of the missing packets arrives.
+ */
+static inline int dccp_ackvec_set_buf_head_state(struct dccp_ackvec *av,
+ const unsigned int packets,
+ const unsigned char state)
+{
+ unsigned int gap;
+ signed long new_head;
+
+ if (av->dccpav_vec_len + packets > av->dccpav_buf_len)
+ return -ENOBUFS;
+
+ gap = packets - 1;
+ new_head = av->dccpav_buf_head - packets;
+
+ if (new_head < 0) {
+ if (gap > 0) {
+ memset(av->dccpav_buf, DCCP_ACKVEC_STATE_NOT_RECEIVED,
+ gap + new_head + 1);
+ gap = -new_head;
+ }
+ new_head += av->dccpav_buf_len;
+ }
+
+ av->dccpav_buf_head = new_head;
+
+ if (gap > 0)
+ memset(av->dccpav_buf + av->dccpav_buf_head + 1,
+ DCCP_ACKVEC_STATE_NOT_RECEIVED, gap);
+
+ av->dccpav_buf[av->dccpav_buf_head] = state;
+ av->dccpav_vec_len += packets;
+ return 0;
+}
+
+/*
+ * Implements the draft-ietf-dccp-spec-11.txt Appendix A
+ */
+int dccp_ackvec_add(struct dccp_ackvec *av, const struct sock *sk,
+ const u64 ackno, const u8 state)
+{
+ /*
+ * Check at the right places if the buffer is full, if it is, tell the
+ * caller to start dropping packets till the HC-Sender acks our ACK
+ * vectors, when we will free up space in dccpav_buf.
+ *
+ * We may well decide to do buffer compression, etc, but for now lets
+ * just drop.
+ *
+ * From Appendix A:
+ *
+ * Of course, the circular buffer may overflow, either when the
+ * HC-Sender is sending data at a very high rate, when the
+ * HC-Receiver's acknowledgements are not reaching the HC-Sender,
+ * or when the HC-Sender is forgetting to acknowledge those acks
+ * (so the HC-Receiver is unable to clean up old state). In this
+ * case, the HC-Receiver should either compress the buffer (by
+ * increasing run lengths when possible), transfer its state to
+ * a larger buffer, or, as a last resort, drop all received
+ * packets, without processing them whatsoever, until its buffer
+ * shrinks again.
+ */
+
+ /* See if this is the first ackno being inserted */
+ if (av->dccpav_vec_len == 0) {
+ av->dccpav_buf[av->dccpav_buf_head] = state;
+ av->dccpav_vec_len = 1;
+ } else if (after48(ackno, av->dccpav_buf_ackno)) {
+ const u64 delta = dccp_delta_seqno(av->dccpav_buf_ackno,
+ ackno);
+
+ /*
+ * Look if the state of this packet is the same as the
+ * previous ackno and if so if we can bump the head len.
+ */
+ if (delta == 1 &&
+ dccp_ackvec_state(av, av->dccpav_buf_head) == state &&
+ (dccp_ackvec_len(av, av->dccpav_buf_head) <
+ DCCP_ACKVEC_LEN_MASK))
+ av->dccpav_buf[av->dccpav_buf_head]++;
+ else if (dccp_ackvec_set_buf_head_state(av, delta, state))
+ return -ENOBUFS;
+ } else {
+ /*
+ * A.1.2. Old Packets
+ *
+ * When a packet with Sequence Number S arrives, and
+ * S <= buf_ackno, the HC-Receiver will scan the table
+ * for the byte corresponding to S. (Indexing structures
+ * could reduce the complexity of this scan.)
+ */
+ u64 delta = dccp_delta_seqno(ackno, av->dccpav_buf_ackno);
+ unsigned int index = av->dccpav_buf_head;
+
+ while (1) {
+ const u8 len = dccp_ackvec_len(av, index);
+ const u8 state = dccp_ackvec_state(av, index);
+ /*
+ * valid packets not yet in dccpav_buf have a reserved
+ * entry, with a len equal to 0.
+ */
+ if (state == DCCP_ACKVEC_STATE_NOT_RECEIVED &&
+ len == 0 && delta == 0) { /* Found our
+ reserved seat! */
+ dccp_pr_debug("Found %llu reserved seat!\n",
+ (unsigned long long)ackno);
+ av->dccpav_buf[index] = state;
+ goto out;
+ }
+ /* len == 0 means one packet */
+ if (delta < len + 1)
+ goto out_duplicate;
+
+ delta -= len + 1;
+ if (++index == av->dccpav_buf_len)
+ index = 0;
+ }
+ }
+
+ av->dccpav_buf_ackno = ackno;
+ dccp_timestamp(sk, &av->dccpav_time);
+out:
+ dccp_pr_debug("");
+ return 0;
+
+out_duplicate:
+ /* Duplicate packet */
+ dccp_pr_debug("Received a dup or already considered lost "
+ "packet: %llu\n", (unsigned long long)ackno);
+ return -EILSEQ;
+}
+
+#ifdef CONFIG_IP_DCCP_DEBUG
+void dccp_ackvector_print(const u64 ackno, const unsigned char *vector, int len)
+{
+ if (!dccp_debug)
+ return;
+
+ printk("ACK vector len=%d, ackno=%llu |", len,
+ (unsigned long long)ackno);
+
+ while (len--) {
+ const u8 state = (*vector & DCCP_ACKVEC_STATE_MASK) >> 6;
+ const u8 rl = *vector & DCCP_ACKVEC_LEN_MASK;
+
+ printk("%d,%d|", state, rl);
+ ++vector;
+ }
+
+ printk("\n");
+}
+
+void dccp_ackvec_print(const struct dccp_ackvec *av)
+{
+ dccp_ackvector_print(av->dccpav_buf_ackno,
+ av->dccpav_buf + av->dccpav_buf_head,
+ av->dccpav_vec_len);
+}
+#endif
+
+static void dccp_ackvec_trow_away_ack_record(struct dccp_ackvec *av)
+{
+ /*
+ * As we're keeping track of the ack vector size (dccpav_vec_len) and
+ * the sent ack vector size (dccpav_sent_len) we don't need
+ * dccpav_buf_tail at all, but keep this code here as in the future
+ * we'll implement a vector of ack records, as suggested in
+ * draft-ietf-dccp-spec-11.txt Appendix A. -acme
+ */
+#if 0
+ av->dccpav_buf_tail = av->dccpav_ack_ptr + 1;
+ if (av->dccpav_buf_tail >= av->dccpav_vec_len)
+ av->dccpav_buf_tail -= av->dccpav_vec_len;
+#endif
+ av->dccpav_vec_len -= av->dccpav_sent_len;
+}
+
+void dccp_ackvec_check_rcv_ackno(struct dccp_ackvec *av, struct sock *sk,
+ const u64 ackno)
+{
+ /* Check if we actually sent an ACK vector */
+ if (av->dccpav_ack_seqno == DCCP_MAX_SEQNO + 1)
+ return;
+
+ if (ackno == av->dccpav_ack_seqno) {
+#ifdef CONFIG_IP_DCCP_DEBUG
+ struct dccp_sock *dp = dccp_sk(sk);
+ const char *debug_prefix = dp->dccps_role == DCCP_ROLE_CLIENT ?
+ "CLIENT rx ack: " : "server rx ack: ";
+#endif
+ dccp_pr_debug("%sACK packet 0, len=%d, ack_seqno=%llu, "
+ "ack_ackno=%llu, ACKED!\n",
+ debug_prefix, 1,
+ (unsigned long long)av->dccpav_ack_seqno,
+ (unsigned long long)av->dccpav_ack_ackno);
+ dccp_ackvec_trow_away_ack_record(av);
+ av->dccpav_ack_seqno = DCCP_MAX_SEQNO + 1;
+ }
+}
+
+static void dccp_ackvec_check_rcv_ackvector(struct dccp_ackvec *av,
+ struct sock *sk, u64 ackno,
+ const unsigned char len,
+ const unsigned char *vector)
+{
+ unsigned char i;
+
+ /* Check if we actually sent an ACK vector */
+ if (av->dccpav_ack_seqno == DCCP_MAX_SEQNO + 1)
+ return;
+ /*
+ * We're in the receiver half connection, so if the received an ACK
+ * vector ackno (e.g. 50) before dccpav_ack_seqno (e.g. 52), we're
+ * not interested.
+ *
+ * Extra explanation with example:
+ *
+ * if we received an ACK vector with ackno 50, it can only be acking
+ * 50, 49, 48, etc, not 52 (the seqno for the ACK vector we sent).
+ */
+ /* dccp_pr_debug("is %llu < %llu? ", ackno, av->dccpav_ack_seqno); */
+ if (before48(ackno, av->dccpav_ack_seqno)) {
+ /* dccp_pr_debug_cat("yes\n"); */
+ return;
+ }
+ /* dccp_pr_debug_cat("no\n"); */
+
+ i = len;
+ while (i--) {
+ const u8 rl = *vector & DCCP_ACKVEC_LEN_MASK;
+ u64 ackno_end_rl;
+
+ dccp_set_seqno(&ackno_end_rl, ackno - rl);
+
+ /*
+ * dccp_pr_debug("is %llu <= %llu <= %llu? ", ackno_end_rl,
+ * av->dccpav_ack_seqno, ackno);
+ */
+ if (between48(av->dccpav_ack_seqno, ackno_end_rl, ackno)) {
+ const u8 state = (*vector &
+ DCCP_ACKVEC_STATE_MASK) >> 6;
+ /* dccp_pr_debug_cat("yes\n"); */
+
+ if (state != DCCP_ACKVEC_STATE_NOT_RECEIVED) {
+#ifdef CONFIG_IP_DCCP_DEBUG
+ struct dccp_sock *dp = dccp_sk(sk);
+ const char *debug_prefix =
+ dp->dccps_role == DCCP_ROLE_CLIENT ?
+ "CLIENT rx ack: " : "server rx ack: ";
+#endif
+ dccp_pr_debug("%sACK vector 0, len=%d, "
+ "ack_seqno=%llu, ack_ackno=%llu, "
+ "ACKED!\n",
+ debug_prefix, len,
+ (unsigned long long)
+ av->dccpav_ack_seqno,
+ (unsigned long long)
+ av->dccpav_ack_ackno);
+ dccp_ackvec_trow_away_ack_record(av);
+ }
+ /*
+ * If dccpav_ack_seqno was not received, no problem
+ * we'll send another ACK vector.
+ */
+ av->dccpav_ack_seqno = DCCP_MAX_SEQNO + 1;
+ break;
+ }
+ /* dccp_pr_debug_cat("no\n"); */
+
+ dccp_set_seqno(&ackno, ackno_end_rl - 1);
+ ++vector;
+ }
+}
+
+int dccp_ackvec_parse(struct sock *sk, const struct sk_buff *skb,
+ const u8 opt, const u8 *value, const u8 len)
+{
+ if (len > DCCP_MAX_ACKVEC_LEN)
+ return -1;
+
+ /* dccp_ackvector_print(DCCP_SKB_CB(skb)->dccpd_ack_seq, value, len); */
+ dccp_ackvec_check_rcv_ackvector(dccp_sk(sk)->dccps_hc_rx_ackvec, sk,
+ DCCP_SKB_CB(skb)->dccpd_ack_seq,
+ len, value);
+ return 0;
+}
diff --git a/net/dccp/ackvec.h b/net/dccp/ackvec.h
new file mode 100644
index 0000000..8ca51c9
--- /dev/null
+++ b/net/dccp/ackvec.h
@@ -0,0 +1,133 @@
+#ifndef _ACKVEC_H
+#define _ACKVEC_H
+/*
+ * net/dccp/ackvec.h
+ *
+ * An implementation of the DCCP protocol
+ * Copyright (c) 2005 Arnaldo Carvalho de Melo <acme@mandriva.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/config.h>
+#include <linux/compiler.h>
+#include <linux/time.h>
+#include <linux/types.h>
+
+/* Read about the ECN nonce to see why it is 253 */
+#define DCCP_MAX_ACKVEC_LEN 253
+
+#define DCCP_ACKVEC_STATE_RECEIVED 0
+#define DCCP_ACKVEC_STATE_ECN_MARKED (1 << 6)
+#define DCCP_ACKVEC_STATE_NOT_RECEIVED (3 << 6)
+
+#define DCCP_ACKVEC_STATE_MASK 0xC0 /* 11000000 */
+#define DCCP_ACKVEC_LEN_MASK 0x3F /* 00111111 */
+
+/** struct dccp_ackvec - ack vector
+ *
+ * This data structure is the one defined in the DCCP draft
+ * Appendix A.
+ *
+ * @dccpav_buf_head - circular buffer head
+ * @dccpav_buf_tail - circular buffer tail
+ * @dccpav_buf_ackno - ack # of the most recent packet acknowledgeable in the
+ * buffer (i.e. %dccpav_buf_head)
+ * @dccpav_buf_nonce - the one-bit sum of the ECN Nonces on all packets acked
+ * by the buffer with State 0
+ *
+ * Additionally, the HC-Receiver must keep some information about the
+ * Ack Vectors it has recently sent. For each packet sent carrying an
+ * Ack Vector, it remembers four variables:
+ *
+ * @dccpav_ack_seqno - the Sequence Number used for the packet
+ * (HC-Receiver seqno)
+ * @dccpav_ack_ptr - the value of buf_head at the time of acknowledgement.
+ * @dccpav_ack_ackno - the Acknowledgement Number used for the packet
+ * (HC-Sender seqno)
+ * @dccpav_ack_nonce - the one-bit sum of the ECN Nonces for all State 0.
+ *
+ * @dccpav_buf_len - circular buffer length
+ * @dccpav_time - the time in usecs
+ * @dccpav_buf - circular buffer of acknowledgeable packets
+ */
+struct dccp_ackvec {
+ unsigned int dccpav_buf_head;
+ unsigned int dccpav_buf_tail;
+ u64 dccpav_buf_ackno;
+ u64 dccpav_ack_seqno;
+ u64 dccpav_ack_ackno;
+ unsigned int dccpav_ack_ptr;
+ unsigned int dccpav_sent_len;
+ unsigned int dccpav_vec_len;
+ unsigned int dccpav_buf_len;
+ struct timeval dccpav_time;
+ u8 dccpav_buf_nonce;
+ u8 dccpav_ack_nonce;
+ u8 dccpav_buf[0];
+};
+
+struct sock;
+struct sk_buff;
+
+#ifdef CONFIG_IP_DCCP_ACKVEC
+extern struct dccp_ackvec *dccp_ackvec_alloc(unsigned int len,
+ const unsigned int __nocast priority);
+extern void dccp_ackvec_free(struct dccp_ackvec *av);
+
+extern int dccp_ackvec_add(struct dccp_ackvec *av, const struct sock *sk,
+ const u64 ackno, const u8 state);
+
+extern void dccp_ackvec_check_rcv_ackno(struct dccp_ackvec *av,
+ struct sock *sk, const u64 ackno);
+extern int dccp_ackvec_parse(struct sock *sk, const struct sk_buff *skb,
+ const u8 opt, const u8 *value, const u8 len);
+
+extern int dccp_insert_option_ackvec(struct sock *sk, struct sk_buff *skb);
+
+static inline int dccp_ackvec_pending(const struct dccp_ackvec *av)
+{
+ return av->dccpav_sent_len != av->dccpav_vec_len;
+}
+#else /* CONFIG_IP_DCCP_ACKVEC */
+static inline struct dccp_ackvec *dccp_ackvec_alloc(unsigned int len,
+ const unsigned int __nocast priority)
+{
+ return NULL;
+}
+
+static inline void dccp_ackvec_free(struct dccp_ackvec *av)
+{
+}
+
+static inline int dccp_ackvec_add(struct dccp_ackvec *av, const struct sock *sk,
+ const u64 ackno, const u8 state)
+{
+ return -1;
+}
+
+static inline void dccp_ackvec_check_rcv_ackno(struct dccp_ackvec *av,
+ struct sock *sk, const u64 ackno)
+{
+}
+
+static inline int dccp_ackvec_parse(struct sock *sk, const struct sk_buff *skb,
+ const u8 opt, const u8 *value, const u8 len)
+{
+ return -1;
+}
+
+static inline int dccp_insert_option_ackvec(const struct sock *sk,
+ const struct sk_buff *skb)
+{
+ return -1;
+}
+
+static inline int dccp_ackvec_pending(const struct dccp_ackvec *av)
+{
+ return 0;
+}
+#endif /* CONFIG_IP_DCCP_ACKVEC */
+#endif /* _ACKVEC_H */
diff --git a/net/dccp/ccid.h b/net/dccp/ccid.h
index 962f1e9..21e5514 100644
--- a/net/dccp/ccid.h
+++ b/net/dccp/ccid.h
@@ -14,6 +14,7 @@
*/
#include <net/sock.h>
+#include <linux/compiler.h>
#include <linux/dccp.h>
#include <linux/list.h>
#include <linux/module.h>
@@ -54,6 +55,14 @@ struct ccid {
struct tcp_info *info);
void (*ccid_hc_tx_get_info)(struct sock *sk,
struct tcp_info *info);
+ int (*ccid_hc_rx_getsockopt)(struct sock *sk,
+ const int optname, int len,
+ u32 __user *optval,
+ int __user *optlen);
+ int (*ccid_hc_tx_getsockopt)(struct sock *sk,
+ const int optname, int len,
+ u32 __user *optval,
+ int __user *optlen);
};
extern int ccid_register(struct ccid *ccid);
@@ -177,4 +186,26 @@ static inline void ccid_hc_tx_get_info(struct ccid *ccid, struct sock *sk,
if (ccid->ccid_hc_tx_get_info != NULL)
ccid->ccid_hc_tx_get_info(sk, info);
}
+
+static inline int ccid_hc_rx_getsockopt(struct ccid *ccid, struct sock *sk,
+ const int optname, int len,
+ u32 __user *optval, int __user *optlen)
+{
+ int rc = -ENOPROTOOPT;
+ if (ccid->ccid_hc_rx_getsockopt != NULL)
+ rc = ccid->ccid_hc_rx_getsockopt(sk, optname, len,
+ optval, optlen);
+ return rc;
+}
+
+static inline int ccid_hc_tx_getsockopt(struct ccid *ccid, struct sock *sk,
+ const int optname, int len,
+ u32 __user *optval, int __user *optlen)
+{
+ int rc = -ENOPROTOOPT;
+ if (ccid->ccid_hc_tx_getsockopt != NULL)
+ rc = ccid->ccid_hc_tx_getsockopt(sk, optname, len,
+ optval, optlen);
+ return rc;
+}
#endif /* _CCID_H */
diff --git a/net/dccp/ccids/ccid3.c b/net/dccp/ccids/ccid3.c
index 38aa849..aa68e0a 100644
--- a/net/dccp/ccids/ccid3.c
+++ b/net/dccp/ccids/ccid3.c
@@ -1120,6 +1120,60 @@ static void ccid3_hc_tx_get_info(struct sock *sk, struct tcp_info *info)
info->tcpi_rtt = hctx->ccid3hctx_rtt;
}
+static int ccid3_hc_rx_getsockopt(struct sock *sk, const int optname, int len,
+ u32 __user *optval, int __user *optlen)
+{
+ const struct ccid3_hc_rx_sock *hcrx = ccid3_hc_rx_sk(sk);
+ const void *val;
+
+ /* Listen socks doesn't have a private CCID block */
+ if (sk->sk_state == DCCP_LISTEN)
+ return -EINVAL;
+
+ switch (optname) {
+ case DCCP_SOCKOPT_CCID_RX_INFO:
+ if (len < sizeof(hcrx->ccid3hcrx_tfrc))
+ return -EINVAL;
+ len = sizeof(hcrx->ccid3hcrx_tfrc);
+ val = &hcrx->ccid3hcrx_tfrc;
+ break;
+ default:
+ return -ENOPROTOOPT;
+ }
+
+ if (put_user(len, optlen) || copy_to_user(optval, val, len))
+ return -EFAULT;
+
+ return 0;
+}
+
+static int ccid3_hc_tx_getsockopt(struct sock *sk, const int optname, int len,
+ u32 __user *optval, int __user *optlen)
+{
+ const struct ccid3_hc_tx_sock *hctx = ccid3_hc_tx_sk(sk);
+ const void *val;
+
+ /* Listen socks doesn't have a private CCID block */
+ if (sk->sk_state == DCCP_LISTEN)
+ return -EINVAL;
+
+ switch (optname) {
+ case DCCP_SOCKOPT_CCID_TX_INFO:
+ if (len < sizeof(hctx->ccid3hctx_tfrc))
+ return -EINVAL;
+ len = sizeof(hctx->ccid3hctx_tfrc);
+ val = &hctx->ccid3hctx_tfrc;
+ break;
+ default:
+ return -ENOPROTOOPT;
+ }
+
+ if (put_user(len, optlen) || copy_to_user(optval, val, len))
+ return -EFAULT;
+
+ return 0;
+}
+
static struct ccid ccid3 = {
.ccid_id = 3,
.ccid_name = "ccid3",
@@ -1139,6 +1193,8 @@ static struct ccid ccid3 = {
.ccid_hc_rx_packet_recv = ccid3_hc_rx_packet_recv,
.ccid_hc_rx_get_info = ccid3_hc_rx_get_info,
.ccid_hc_tx_get_info = ccid3_hc_tx_get_info,
+ .ccid_hc_rx_getsockopt = ccid3_hc_rx_getsockopt,
+ .ccid_hc_tx_getsockopt = ccid3_hc_tx_getsockopt,
};
module_param(ccid3_debug, int, 0444);
diff --git a/net/dccp/ccids/ccid3.h b/net/dccp/ccids/ccid3.h
index eb24877..0bde458 100644
--- a/net/dccp/ccids/ccid3.h
+++ b/net/dccp/ccids/ccid3.h
@@ -40,6 +40,7 @@
#include <linux/list.h>
#include <linux/time.h>
#include <linux/types.h>
+#include <linux/tfrc.h>
#define TFRC_MIN_PACKET_SIZE 16
#define TFRC_STD_PACKET_SIZE 256
@@ -93,12 +94,15 @@ struct ccid3_options_received {
* @ccid3hctx_hist - Packet history
*/
struct ccid3_hc_tx_sock {
- u32 ccid3hctx_x;
- u32 ccid3hctx_x_recv;
- u32 ccid3hctx_x_calc;
+ struct tfrc_tx_info ccid3hctx_tfrc;
+#define ccid3hctx_x ccid3hctx_tfrc.tfrctx_x
+#define ccid3hctx_x_recv ccid3hctx_tfrc.tfrctx_x_recv
+#define ccid3hctx_x_calc ccid3hctx_tfrc.tfrctx_x_calc
+#define ccid3hctx_rtt ccid3hctx_tfrc.tfrctx_rtt
+#define ccid3hctx_p ccid3hctx_tfrc.tfrctx_p
+#define ccid3hctx_t_rto ccid3hctx_tfrc.tfrctx_rto
+#define ccid3hctx_t_ipi ccid3hctx_tfrc.tfrctx_ipi
u16 ccid3hctx_s;
- u32 ccid3hctx_rtt;
- u32 ccid3hctx_p;
u8 ccid3hctx_state;
u8 ccid3hctx_last_win_count;
u8 ccid3hctx_idle;
@@ -106,19 +110,19 @@ struct ccid3_hc_tx_sock {
struct timer_list ccid3hctx_no_feedback_timer;
struct timeval ccid3hctx_t_ld;
struct timeval ccid3hctx_t_nom;
- u32 ccid3hctx_t_rto;
- u32 ccid3hctx_t_ipi;
u32 ccid3hctx_delta;
struct list_head ccid3hctx_hist;
struct ccid3_options_received ccid3hctx_options_received;
};
struct ccid3_hc_rx_sock {
+ struct tfrc_rx_info ccid3hcrx_tfrc;
+#define ccid3hcrx_x_recv ccid3hcrx_tfrc.tfrcrx_x_recv
+#define ccid3hcrx_rtt ccid3hcrx_tfrc.tfrcrx_rtt
+#define ccid3hcrx_p ccid3hcrx_tfrc.tfrcrx_p
u64 ccid3hcrx_seqno_last_counter:48,
ccid3hcrx_state:8,
ccid3hcrx_last_counter:4;
- u32 ccid3hcrx_rtt;
- u32 ccid3hcrx_p;
u32 ccid3hcrx_bytes_recv;
struct timeval ccid3hcrx_tstamp_last_feedback;
struct timeval ccid3hcrx_tstamp_last_ack;
@@ -127,7 +131,6 @@ struct ccid3_hc_rx_sock {
u16 ccid3hcrx_s;
u32 ccid3hcrx_pinv;
u32 ccid3hcrx_elapsed_time;
- u32 ccid3hcrx_x_recv;
};
static inline struct ccid3_hc_tx_sock *ccid3_hc_tx_sk(const struct sock *sk)
diff --git a/net/dccp/dccp.h b/net/dccp/dccp.h
index 95c4630b..5871c02 100644
--- a/net/dccp/dccp.h
+++ b/net/dccp/dccp.h
@@ -17,6 +17,7 @@
#include <net/snmp.h>
#include <net/sock.h>
#include <net/tcp.h>
+#include "ackvec.h"
#ifdef CONFIG_IP_DCCP_DEBUG
extern int dccp_debug;
@@ -258,13 +259,12 @@ extern int dccp_v4_send_reset(struct sock *sk,
extern void dccp_send_close(struct sock *sk, const int active);
struct dccp_skb_cb {
- __u8 dccpd_type;
- __u8 dccpd_reset_code;
- __u8 dccpd_service;
- __u8 dccpd_ccval;
+ __u8 dccpd_type:4;
+ __u8 dccpd_ccval:4;
+ __u8 dccpd_reset_code;
+ __u16 dccpd_opt_len;
__u64 dccpd_seq;
__u64 dccpd_ack_seq;
- int dccpd_opt_len;
};
#define DCCP_SKB_CB(__skb) ((struct dccp_skb_cb *)&((__skb)->cb[0]))
@@ -359,6 +359,17 @@ static inline void dccp_update_gss(struct sock *sk, u64 seq)
(dp->dccps_gss -
dp->dccps_options.dccpo_sequence_window + 1));
}
+
+static inline int dccp_ack_pending(const struct sock *sk)
+{
+ const struct dccp_sock *dp = dccp_sk(sk);
+ return dp->dccps_timestamp_echo != 0 ||
+#ifdef CONFIG_IP_DCCP_ACKVEC
+ (dp->dccps_options.dccpo_send_ack_vector &&
+ dccp_ackvec_pending(dp->dccps_hc_rx_ackvec)) ||
+#endif
+ inet_csk_ack_scheduled(sk);
+}
extern void dccp_insert_options(struct sock *sk, struct sk_buff *skb);
extern void dccp_insert_option_elapsed_time(struct sock *sk,
@@ -372,65 +383,6 @@ extern void dccp_insert_option(struct sock *sk, struct sk_buff *skb,
extern struct socket *dccp_ctl_socket;
-#define DCCP_ACKPKTS_STATE_RECEIVED 0
-#define DCCP_ACKPKTS_STATE_ECN_MARKED (1 << 6)
-#define DCCP_ACKPKTS_STATE_NOT_RECEIVED (3 << 6)
-
-#define DCCP_ACKPKTS_STATE_MASK 0xC0 /* 11000000 */
-#define DCCP_ACKPKTS_LEN_MASK 0x3F /* 00111111 */
-
-/** struct dccp_ackpkts - acknowledgeable packets
- *
- * This data structure is the one defined in the DCCP draft
- * Appendix A.
- *
- * @dccpap_buf_head - circular buffer head
- * @dccpap_buf_tail - circular buffer tail
- * @dccpap_buf_ackno - ack # of the most recent packet acknowledgeable in the
- * buffer (i.e. %dccpap_buf_head)
- * @dccpap_buf_nonce - the one-bit sum of the ECN Nonces on all packets acked
- * by the buffer with State 0
- *
- * Additionally, the HC-Receiver must keep some information about the
- * Ack Vectors it has recently sent. For each packet sent carrying an
- * Ack Vector, it remembers four variables:
- *
- * @dccpap_ack_seqno - the Sequence Number used for the packet
- * (HC-Receiver seqno)
- * @dccpap_ack_ptr - the value of buf_head at the time of acknowledgement.
- * @dccpap_ack_ackno - the Acknowledgement Number used for the packet
- * (HC-Sender seqno)
- * @dccpap_ack_nonce - the one-bit sum of the ECN Nonces for all State 0.
- *
- * @dccpap_buf_len - circular buffer length
- * @dccpap_time - the time in usecs
- * @dccpap_buf - circular buffer of acknowledgeable packets
- */
-struct dccp_ackpkts {
- unsigned int dccpap_buf_head;
- unsigned int dccpap_buf_tail;
- u64 dccpap_buf_ackno;
- u64 dccpap_ack_seqno;
- u64 dccpap_ack_ackno;
- unsigned int dccpap_ack_ptr;
- unsigned int dccpap_buf_vector_len;
- unsigned int dccpap_ack_vector_len;
- unsigned int dccpap_buf_len;
- struct timeval dccpap_time;
- u8 dccpap_buf_nonce;
- u8 dccpap_ack_nonce;
- u8 dccpap_buf[0];
-};
-
-extern struct dccp_ackpkts *
- dccp_ackpkts_alloc(unsigned int len,
- const unsigned int __nocast priority);
-extern void dccp_ackpkts_free(struct dccp_ackpkts *ap);
-extern int dccp_ackpkts_add(struct dccp_ackpkts *ap, const struct sock *sk,
- u64 ackno, u8 state);
-extern void dccp_ackpkts_check_rcv_ackno(struct dccp_ackpkts *ap,
- struct sock *sk, u64 ackno);
-
extern void dccp_timestamp(const struct sock *sk, struct timeval *tv);
static inline suseconds_t timeval_usecs(const struct timeval *tv)
@@ -471,15 +423,4 @@ static inline void timeval_sub_usecs(struct timeval *tv,
}
}
-#ifdef CONFIG_IP_DCCP_DEBUG
-extern void dccp_ackvector_print(const u64 ackno,
- const unsigned char *vector, int len);
-extern void dccp_ackpkts_print(const struct dccp_ackpkts *ap);
-#else
-static inline void dccp_ackvector_print(const u64 ackno,
- const unsigned char *vector,
- int len) { }
-static inline void dccp_ackpkts_print(const struct dccp_ackpkts *ap) { }
-#endif
-
#endif /* _DCCP_H */
diff --git a/net/dccp/input.c b/net/dccp/input.c
index c74034c..1b6b2cb 100644
--- a/net/dccp/input.c
+++ b/net/dccp/input.c
@@ -16,6 +16,7 @@
#include <net/sock.h>
+#include "ackvec.h"
#include "ccid.h"
#include "dccp.h"
@@ -60,8 +61,8 @@ static inline void dccp_event_ack_recv(struct sock *sk, struct sk_buff *skb)
struct dccp_sock *dp = dccp_sk(sk);
if (dp->dccps_options.dccpo_send_ack_vector)
- dccp_ackpkts_check_rcv_ackno(dp->dccps_hc_rx_ackpkts, sk,
- DCCP_SKB_CB(skb)->dccpd_ack_seq);
+ dccp_ackvec_check_rcv_ackno(dp->dccps_hc_rx_ackvec, sk,
+ DCCP_SKB_CB(skb)->dccpd_ack_seq);
}
static int dccp_check_seqno(struct sock *sk, struct sk_buff *skb)
@@ -164,37 +165,11 @@ int dccp_rcv_established(struct sock *sk, struct sk_buff *skb,
if (DCCP_SKB_CB(skb)->dccpd_ack_seq != DCCP_PKT_WITHOUT_ACK_SEQ)
dccp_event_ack_recv(sk, skb);
- /*
- * FIXME: check ECN to see if we should use
- * DCCP_ACKPKTS_STATE_ECN_MARKED
- */
- if (dp->dccps_options.dccpo_send_ack_vector) {
- struct dccp_ackpkts *ap = dp->dccps_hc_rx_ackpkts;
-
- if (dccp_ackpkts_add(dp->dccps_hc_rx_ackpkts, sk,
- DCCP_SKB_CB(skb)->dccpd_seq,
- DCCP_ACKPKTS_STATE_RECEIVED)) {
- LIMIT_NETDEBUG(KERN_WARNING "DCCP: acknowledgeable "
- "packets buffer full!\n");
- ap->dccpap_ack_seqno = DCCP_MAX_SEQNO + 1;
- inet_csk_schedule_ack(sk);
- inet_csk_reset_xmit_timer(sk, ICSK_TIME_DACK,
- TCP_DELACK_MIN,
- DCCP_RTO_MAX);
- goto discard;
- }
-
- /*
- * FIXME: this activation is probably wrong, have to study more
- * TCP delack machinery and how it fits into DCCP draft, but
- * for now it kinda "works" 8)
- */
- if (!inet_csk_ack_scheduled(sk)) {
- inet_csk_schedule_ack(sk);
- inet_csk_reset_xmit_timer(sk, ICSK_TIME_DACK, 5 * HZ,
- DCCP_RTO_MAX);
- }
- }
+ if (dp->dccps_options.dccpo_send_ack_vector &&
+ dccp_ackvec_add(dp->dccps_hc_rx_ackvec, sk,
+ DCCP_SKB_CB(skb)->dccpd_seq,
+ DCCP_ACKVEC_STATE_RECEIVED))
+ goto discard;
ccid_hc_rx_packet_recv(dp->dccps_hc_rx_ccid, sk, skb);
ccid_hc_tx_packet_recv(dp->dccps_hc_tx_ccid, sk, skb);
@@ -384,9 +359,9 @@ static int dccp_rcv_request_sent_state_process(struct sock *sk,
}
out_invalid_packet:
- return 1; /* dccp_v4_do_rcv will send a reset, but...
- FIXME: the reset code should be
- DCCP_RESET_CODE_PACKET_ERROR */
+ /* dccp_v4_do_rcv will send a reset */
+ DCCP_SKB_CB(skb)->dccpd_reset_code = DCCP_RESET_CODE_PACKET_ERROR;
+ return 1;
}
static int dccp_rcv_respond_partopen_state_process(struct sock *sk,
@@ -433,6 +408,7 @@ int dccp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
struct dccp_hdr *dh, unsigned len)
{
struct dccp_sock *dp = dccp_sk(sk);
+ struct dccp_skb_cb *dcb = DCCP_SKB_CB(skb);
const int old_state = sk->sk_state;
int queued = 0;
@@ -473,7 +449,8 @@ int dccp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
if (dh->dccph_type == DCCP_PKT_RESET)
goto discard;
- /* Caller (dccp_v4_do_rcv) will send Reset(No Connection)*/
+ /* Caller (dccp_v4_do_rcv) will send Reset */
+ dcb->dccpd_reset_code = DCCP_RESET_CODE_NO_CONNECTION;
return 1;
}
@@ -487,36 +464,17 @@ int dccp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
if (dccp_parse_options(sk, skb))
goto discard;
- if (DCCP_SKB_CB(skb)->dccpd_ack_seq !=
- DCCP_PKT_WITHOUT_ACK_SEQ)
+ if (dcb->dccpd_ack_seq != DCCP_PKT_WITHOUT_ACK_SEQ)
dccp_event_ack_recv(sk, skb);
ccid_hc_rx_packet_recv(dp->dccps_hc_rx_ccid, sk, skb);
ccid_hc_tx_packet_recv(dp->dccps_hc_tx_ccid, sk, skb);
- /*
- * FIXME: check ECN to see if we should use
- * DCCP_ACKPKTS_STATE_ECN_MARKED
- */
- if (dp->dccps_options.dccpo_send_ack_vector) {
- if (dccp_ackpkts_add(dp->dccps_hc_rx_ackpkts, sk,
- DCCP_SKB_CB(skb)->dccpd_seq,
- DCCP_ACKPKTS_STATE_RECEIVED))
- goto discard;
- /*
- * FIXME: this activation is probably wrong, have to
- * study more TCP delack machinery and how it fits into
- * DCCP draft, but for now it kinda "works" 8)
- */
- if ((dp->dccps_hc_rx_ackpkts->dccpap_ack_seqno ==
- DCCP_MAX_SEQNO + 1) &&
- !inet_csk_ack_scheduled(sk)) {
- inet_csk_schedule_ack(sk);
- inet_csk_reset_xmit_timer(sk, ICSK_TIME_DACK,
- TCP_DELACK_MIN,
- DCCP_RTO_MAX);
- }
- }
+ if (dp->dccps_options.dccpo_send_ack_vector &&
+ dccp_ackvec_add(dp->dccps_hc_rx_ackvec, sk,
+ DCCP_SKB_CB(skb)->dccpd_seq,
+ DCCP_ACKVEC_STATE_RECEIVED))
+ goto discard;
}
/*
@@ -551,8 +509,7 @@ int dccp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
dh->dccph_type == DCCP_PKT_REQUEST) ||
(sk->sk_state == DCCP_RESPOND &&
dh->dccph_type == DCCP_PKT_DATA)) {
- dccp_send_sync(sk, DCCP_SKB_CB(skb)->dccpd_seq,
- DCCP_PKT_SYNC);
+ dccp_send_sync(sk, dcb->dccpd_seq, DCCP_PKT_SYNC);
goto discard;
} else if (dh->dccph_type == DCCP_PKT_CLOSEREQ) {
dccp_rcv_closereq(sk, skb);
@@ -563,13 +520,13 @@ int dccp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
}
if (unlikely(dh->dccph_type == DCCP_PKT_SYNC)) {
- dccp_send_sync(sk, DCCP_SKB_CB(skb)->dccpd_seq,
- DCCP_PKT_SYNCACK);
+ dccp_send_sync(sk, dcb->dccpd_seq, DCCP_PKT_SYNCACK);
goto discard;
}
switch (sk->sk_state) {
case DCCP_CLOSED:
+ dcb->dccpd_reset_code = DCCP_RESET_CODE_NO_CONNECTION;
return 1;
case DCCP_REQUESTING:
diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c
index 2afaa46..40fe6af 100644
--- a/net/dccp/ipv4.c
+++ b/net/dccp/ipv4.c
@@ -23,6 +23,7 @@
#include <net/tcp_states.h>
#include <net/xfrm.h>
+#include "ackvec.h"
#include "ccid.h"
#include "dccp.h"
@@ -246,6 +247,9 @@ static int dccp_v4_connect(struct sock *sk, struct sockaddr *uaddr,
dp->dccps_role = DCCP_ROLE_CLIENT;
+ if (dccp_service_not_initialized(sk))
+ return -EPROTO;
+
if (addr_len < sizeof(struct sockaddr_in))
return -EINVAL;
@@ -661,6 +665,16 @@ static inline u64 dccp_v4_init_sequence(const struct sock *sk,
dccp_hdr(skb)->dccph_sport);
}
+static inline int dccp_bad_service_code(const struct sock *sk,
+ const __u32 service)
+{
+ const struct dccp_sock *dp = dccp_sk(sk);
+
+ if (dp->dccps_service == service)
+ return 0;
+ return !dccp_list_has_service(dp->dccps_service_list, service);
+}
+
int dccp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
{
struct inet_request_sock *ireq;
@@ -669,13 +683,22 @@ int dccp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
struct dccp_request_sock *dreq;
const __u32 saddr = skb->nh.iph->saddr;
const __u32 daddr = skb->nh.iph->daddr;
+ const __u32 service = dccp_hdr_request(skb)->dccph_req_service;
+ struct dccp_skb_cb *dcb = DCCP_SKB_CB(skb);
+ __u8 reset_code = DCCP_RESET_CODE_TOO_BUSY;
struct dst_entry *dst = NULL;
/* Never answer to DCCP_PKT_REQUESTs send to broadcast or multicast */
if (((struct rtable *)skb->dst)->rt_flags &
- (RTCF_BROADCAST | RTCF_MULTICAST))
+ (RTCF_BROADCAST | RTCF_MULTICAST)) {
+ reset_code = DCCP_RESET_CODE_NO_CONNECTION;
goto drop;
+ }
+ if (dccp_bad_service_code(sk, service)) {
+ reset_code = DCCP_RESET_CODE_BAD_SERVICE_CODE;
+ goto drop;
+ }
/*
* TW buckets are converted to open requests without
* limitations, they conserve resources and peer is
@@ -718,9 +741,9 @@ int dccp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
* dccp_create_openreq_child.
*/
dreq = dccp_rsk(req);
- dreq->dreq_isr = DCCP_SKB_CB(skb)->dccpd_seq;
- dreq->dreq_iss = dccp_v4_init_sequence(sk, skb);
- dreq->dreq_service = dccp_hdr_request(skb)->dccph_req_service;
+ dreq->dreq_isr = dcb->dccpd_seq;
+ dreq->dreq_iss = dccp_v4_init_sequence(sk, skb);
+ dreq->dreq_service = service;
if (dccp_v4_send_response(sk, req, dst))
goto drop_and_free;
@@ -735,6 +758,7 @@ drop_and_free:
__reqsk_free(req);
drop:
DCCP_INC_STATS_BH(DCCP_MIB_ATTEMPTFAILS);
+ dcb->dccpd_reset_code = reset_code;
return -1;
}
@@ -1005,7 +1029,6 @@ int dccp_v4_do_rcv(struct sock *sk, struct sk_buff *skb)
return 0;
reset:
- DCCP_SKB_CB(skb)->dccpd_reset_code = DCCP_RESET_CODE_NO_CONNECTION;
dccp_v4_ctl_send_reset(skb);
discard:
kfree_skb(skb);
@@ -1090,45 +1113,7 @@ int dccp_v4_rcv(struct sk_buff *skb)
goto discard_it;
dh = dccp_hdr(skb);
-#if 0
- /*
- * Use something like this to simulate some DATA/DATAACK loss to test
- * dccp_ackpkts_add, you'll get something like this on a session that
- * sends 10 DATA/DATAACK packets:
- *
- * ackpkts_print: 281473596467422 |0,0|3,0|0,0|3,0|0,0|3,0|0,0|3,0|0,1|
- *
- * 0, 0 means: DCCP_ACKPKTS_STATE_RECEIVED, RLE == just this packet
- * 0, 1 means: DCCP_ACKPKTS_STATE_RECEIVED, RLE == two adjacent packets
- * with the same state
- * 3, 0 means: DCCP_ACKPKTS_STATE_NOT_RECEIVED, RLE == just this packet
- *
- * So...
- *
- * 281473596467422 was received
- * 281473596467421 was not received
- * 281473596467420 was received
- * 281473596467419 was not received
- * 281473596467418 was received
- * 281473596467417 was not received
- * 281473596467416 was received
- * 281473596467415 was not received
- * 281473596467414 was received
- * 281473596467413 was received (this one was the 3way handshake
- * RESPONSE)
- *
- */
- if (dh->dccph_type == DCCP_PKT_DATA ||
- dh->dccph_type == DCCP_PKT_DATAACK) {
- static int discard = 0;
- if (discard) {
- discard = 0;
- goto discard_it;
- }
- discard = 1;
- }
-#endif
DCCP_SKB_CB(skb)->dccpd_seq = dccp_hdr_seq(skb);
DCCP_SKB_CB(skb)->dccpd_type = dh->dccph_type;
@@ -1242,11 +1227,9 @@ static int dccp_v4_init_sock(struct sock *sk)
do_gettimeofday(&dp->dccps_epoch);
if (dp->dccps_options.dccpo_send_ack_vector) {
- dp->dccps_hc_rx_ackpkts =
- dccp_ackpkts_alloc(DCCP_MAX_ACK_VECTOR_LEN,
- GFP_KERNEL);
-
- if (dp->dccps_hc_rx_ackpkts == NULL)
+ dp->dccps_hc_rx_ackvec = dccp_ackvec_alloc(DCCP_MAX_ACKVEC_LEN,
+ GFP_KERNEL);
+ if (dp->dccps_hc_rx_ackvec == NULL)
return -ENOMEM;
}
@@ -1258,16 +1241,18 @@ static int dccp_v4_init_sock(struct sock *sk)
* setsockopt(CCIDs-I-want/accept). -acme
*/
if (likely(!dccp_ctl_socket_init)) {
- dp->dccps_hc_rx_ccid = ccid_init(dp->dccps_options.dccpo_ccid,
+ dp->dccps_hc_rx_ccid = ccid_init(dp->dccps_options.dccpo_rx_ccid,
sk);
- dp->dccps_hc_tx_ccid = ccid_init(dp->dccps_options.dccpo_ccid,
+ dp->dccps_hc_tx_ccid = ccid_init(dp->dccps_options.dccpo_tx_ccid,
sk);
if (dp->dccps_hc_rx_ccid == NULL ||
dp->dccps_hc_tx_ccid == NULL) {
ccid_exit(dp->dccps_hc_rx_ccid, sk);
ccid_exit(dp->dccps_hc_tx_ccid, sk);
- dccp_ackpkts_free(dp->dccps_hc_rx_ackpkts);
- dp->dccps_hc_rx_ackpkts = NULL;
+ if (dp->dccps_options.dccpo_send_ack_vector) {
+ dccp_ackvec_free(dp->dccps_hc_rx_ackvec);
+ dp->dccps_hc_rx_ackvec = NULL;
+ }
dp->dccps_hc_rx_ccid = dp->dccps_hc_tx_ccid = NULL;
return -ENOMEM;
}
@@ -1280,6 +1265,7 @@ static int dccp_v4_init_sock(struct sock *sk)
sk->sk_write_space = dccp_write_space;
dp->dccps_mss_cache = 536;
dp->dccps_role = DCCP_ROLE_UNDEFINED;
+ dp->dccps_service = DCCP_SERVICE_INVALID_VALUE;
return 0;
}
@@ -1301,10 +1287,17 @@ static int dccp_v4_destroy_sock(struct sock *sk)
if (inet_csk(sk)->icsk_bind_hash != NULL)
inet_put_port(&dccp_hashinfo, sk);
+ if (dp->dccps_service_list != NULL) {
+ kfree(dp->dccps_service_list);
+ dp->dccps_service_list = NULL;
+ }
+
ccid_hc_rx_exit(dp->dccps_hc_rx_ccid, sk);
ccid_hc_tx_exit(dp->dccps_hc_tx_ccid, sk);
- dccp_ackpkts_free(dp->dccps_hc_rx_ackpkts);
- dp->dccps_hc_rx_ackpkts = NULL;
+ if (dp->dccps_options.dccpo_send_ack_vector) {
+ dccp_ackvec_free(dp->dccps_hc_rx_ackvec);
+ dp->dccps_hc_rx_ackvec = NULL;
+ }
ccid_exit(dp->dccps_hc_rx_ccid, sk);
ccid_exit(dp->dccps_hc_tx_ccid, sk);
dp->dccps_hc_rx_ccid = dp->dccps_hc_tx_ccid = NULL;
diff --git a/net/dccp/minisocks.c b/net/dccp/minisocks.c
index 18461bc..1393461 100644
--- a/net/dccp/minisocks.c
+++ b/net/dccp/minisocks.c
@@ -19,6 +19,7 @@
#include <net/xfrm.h>
#include <net/inet_timewait_sock.h>
+#include "ackvec.h"
#include "ccid.h"
#include "dccp.h"
@@ -93,22 +94,24 @@ struct sock *dccp_create_openreq_child(struct sock *sk,
struct inet_connection_sock *newicsk = inet_csk(sk);
struct dccp_sock *newdp = dccp_sk(newsk);
- newdp->dccps_hc_rx_ackpkts = NULL;
- newdp->dccps_role = DCCP_ROLE_SERVER;
- newicsk->icsk_rto = DCCP_TIMEOUT_INIT;
+ newdp->dccps_role = DCCP_ROLE_SERVER;
+ newdp->dccps_hc_rx_ackvec = NULL;
+ newdp->dccps_service_list = NULL;
+ newdp->dccps_service = dreq->dreq_service;
+ newicsk->icsk_rto = DCCP_TIMEOUT_INIT;
do_gettimeofday(&newdp->dccps_epoch);
if (newdp->dccps_options.dccpo_send_ack_vector) {
- newdp->dccps_hc_rx_ackpkts =
- dccp_ackpkts_alloc(DCCP_MAX_ACK_VECTOR_LEN,
- GFP_ATOMIC);
+ newdp->dccps_hc_rx_ackvec =
+ dccp_ackvec_alloc(DCCP_MAX_ACKVEC_LEN,
+ GFP_ATOMIC);
/*
* XXX: We're using the same CCIDs set on the parent,
* i.e. sk_clone copied the master sock and left the
* CCID pointers for this child, that is why we do the
* __ccid_get calls.
*/
- if (unlikely(newdp->dccps_hc_rx_ackpkts == NULL))
+ if (unlikely(newdp->dccps_hc_rx_ackvec == NULL))
goto out_free;
}
@@ -116,7 +119,7 @@ struct sock *dccp_create_openreq_child(struct sock *sk,
newsk) != 0 ||
ccid_hc_tx_init(newdp->dccps_hc_tx_ccid,
newsk) != 0)) {
- dccp_ackpkts_free(newdp->dccps_hc_rx_ackpkts);
+ dccp_ackvec_free(newdp->dccps_hc_rx_ackvec);
ccid_hc_rx_exit(newdp->dccps_hc_rx_ccid, newsk);
ccid_hc_tx_exit(newdp->dccps_hc_tx_ccid, newsk);
out_free:
diff --git a/net/dccp/options.c b/net/dccp/options.c
index d4c4242..0a76426 100644
--- a/net/dccp/options.c
+++ b/net/dccp/options.c
@@ -18,19 +18,15 @@
#include <linux/kernel.h>
#include <linux/skbuff.h>
+#include "ackvec.h"
#include "ccid.h"
#include "dccp.h"
-static void dccp_ackpkts_check_rcv_ackvector(struct dccp_ackpkts *ap,
- struct sock *sk,
- const u64 ackno,
- const unsigned char len,
- const unsigned char *vector);
-
/* stores the default values for new connection. may be changed with sysctl */
static const struct dccp_options dccpo_default_values = {
.dccpo_sequence_window = DCCPF_INITIAL_SEQUENCE_WINDOW,
- .dccpo_ccid = DCCPF_INITIAL_CCID,
+ .dccpo_rx_ccid = DCCPF_INITIAL_CCID,
+ .dccpo_tx_ccid = DCCPF_INITIAL_CCID,
.dccpo_send_ack_vector = DCCPF_INITIAL_SEND_ACK_VECTOR,
.dccpo_send_ndp_count = DCCPF_INITIAL_SEND_NDP_COUNT,
};
@@ -113,25 +109,13 @@ int dccp_parse_options(struct sock *sk, struct sk_buff *skb)
opt_recv->dccpor_ndp);
break;
case DCCPO_ACK_VECTOR_0:
- if (len > DCCP_MAX_ACK_VECTOR_LEN)
- goto out_invalid_option;
-
+ case DCCPO_ACK_VECTOR_1:
if (pkt_type == DCCP_PKT_DATA)
continue;
- opt_recv->dccpor_ack_vector_len = len;
- opt_recv->dccpor_ack_vector_idx = value - options;
-
- dccp_pr_debug("%sACK vector 0, len=%d, ack_ackno=%llu\n",
- debug_prefix, len,
- (unsigned long long)
- DCCP_SKB_CB(skb)->dccpd_ack_seq);
- dccp_ackvector_print(DCCP_SKB_CB(skb)->dccpd_ack_seq,
- value, len);
- dccp_ackpkts_check_rcv_ackvector(dp->dccps_hc_rx_ackpkts,
- sk,
- DCCP_SKB_CB(skb)->dccpd_ack_seq,
- len, value);
+ if (dp->dccps_options.dccpo_send_ack_vector &&
+ dccp_ackvec_parse(sk, skb, opt, value, len))
+ goto out_invalid_option;
break;
case DCCPO_TIMESTAMP:
if (len != 4)
@@ -352,86 +336,6 @@ void dccp_insert_option_elapsed_time(struct sock *sk,
EXPORT_SYMBOL_GPL(dccp_insert_option_elapsed_time);
-static void dccp_insert_option_ack_vector(struct sock *sk, struct sk_buff *skb)
-{
- struct dccp_sock *dp = dccp_sk(sk);
-#ifdef CONFIG_IP_DCCP_DEBUG
- const char *debug_prefix = dp->dccps_role == DCCP_ROLE_CLIENT ?
- "CLIENT TX opt: " : "server TX opt: ";
-#endif
- struct dccp_ackpkts *ap = dp->dccps_hc_rx_ackpkts;
- int len = ap->dccpap_buf_vector_len + 2;
- struct timeval now;
- u32 elapsed_time;
- unsigned char *to, *from;
-
- dccp_timestamp(sk, &now);
- elapsed_time = timeval_delta(&now, &ap->dccpap_time) / 10;
-
- if (elapsed_time != 0)
- dccp_insert_option_elapsed_time(sk, skb, elapsed_time);
-
- if (DCCP_SKB_CB(skb)->dccpd_opt_len + len > DCCP_MAX_OPT_LEN) {
- LIMIT_NETDEBUG(KERN_INFO "DCCP: packet too small to "
- "insert ACK Vector!\n");
- return;
- }
-
- /*
- * XXX: now we have just one ack vector sent record, so
- * we have to wait for it to be cleared.
- *
- * Of course this is not acceptable, but this is just for
- * basic testing now.
- */
- if (ap->dccpap_ack_seqno != DCCP_MAX_SEQNO + 1)
- return;
-
- DCCP_SKB_CB(skb)->dccpd_opt_len += len;
-
- to = skb_push(skb, len);
- *to++ = DCCPO_ACK_VECTOR_0;
- *to++ = len;
-
- len = ap->dccpap_buf_vector_len;
- from = ap->dccpap_buf + ap->dccpap_buf_head;
-
- /* Check if buf_head wraps */
- if (ap->dccpap_buf_head + len > ap->dccpap_buf_len) {
- const unsigned int tailsize = (ap->dccpap_buf_len -
- ap->dccpap_buf_head);
-
- memcpy(to, from, tailsize);
- to += tailsize;
- len -= tailsize;
- from = ap->dccpap_buf;
- }
-
- memcpy(to, from, len);
- /*
- * From draft-ietf-dccp-spec-11.txt:
- *
- * For each acknowledgement it sends, the HC-Receiver will add an
- * acknowledgement record. ack_seqno will equal the HC-Receiver
- * sequence number it used for the ack packet; ack_ptr will equal
- * buf_head; ack_ackno will equal buf_ackno; and ack_nonce will
- * equal buf_nonce.
- *
- * This implemention uses just one ack record for now.
- */
- ap->dccpap_ack_seqno = DCCP_SKB_CB(skb)->dccpd_seq;
- ap->dccpap_ack_ptr = ap->dccpap_buf_head;
- ap->dccpap_ack_ackno = ap->dccpap_buf_ackno;
- ap->dccpap_ack_nonce = ap->dccpap_buf_nonce;
- ap->dccpap_ack_vector_len = ap->dccpap_buf_vector_len;
-
- dccp_pr_debug("%sACK Vector 0, len=%d, ack_seqno=%llu, "
- "ack_ackno=%llu\n",
- debug_prefix, ap->dccpap_ack_vector_len,
- (unsigned long long) ap->dccpap_ack_seqno,
- (unsigned long long) ap->dccpap_ack_ackno);
-}
-
void dccp_timestamp(const struct sock *sk, struct timeval *tv)
{
const struct dccp_sock *dp = dccp_sk(sk);
@@ -528,9 +432,8 @@ void dccp_insert_options(struct sock *sk, struct sk_buff *skb)
if (!dccp_packet_without_ack(skb)) {
if (dp->dccps_options.dccpo_send_ack_vector &&
- (dp->dccps_hc_rx_ackpkts->dccpap_buf_ackno !=
- DCCP_MAX_SEQNO + 1))
- dccp_insert_option_ack_vector(sk, skb);
+ dccp_ackvec_pending(dp->dccps_hc_rx_ackvec))
+ dccp_insert_option_ackvec(sk, skb);
if (dp->dccps_timestamp_echo != 0)
dccp_insert_option_timestamp_echo(sk, skb);
}
@@ -557,331 +460,3 @@ void dccp_insert_options(struct sock *sk, struct sk_buff *skb)
}
}
}
-
-struct dccp_ackpkts *dccp_ackpkts_alloc(const unsigned int len,
- const unsigned int __nocast priority)
-{
- struct dccp_ackpkts *ap = kmalloc(sizeof(*ap) + len, priority);
-
- if (ap != NULL) {
-#ifdef CONFIG_IP_DCCP_DEBUG
- memset(ap->dccpap_buf, 0xFF, len);
-#endif
- ap->dccpap_buf_len = len;
- ap->dccpap_buf_head =
- ap->dccpap_buf_tail =
- ap->dccpap_buf_len - 1;
- ap->dccpap_buf_ackno =
- ap->dccpap_ack_ackno =
- ap->dccpap_ack_seqno = DCCP_MAX_SEQNO + 1;
- ap->dccpap_buf_nonce = ap->dccpap_buf_nonce = 0;
- ap->dccpap_ack_ptr = 0;
- ap->dccpap_time.tv_sec = 0;
- ap->dccpap_time.tv_usec = 0;
- ap->dccpap_buf_vector_len = ap->dccpap_ack_vector_len = 0;
- }
-
- return ap;
-}
-
-void dccp_ackpkts_free(struct dccp_ackpkts *ap)
-{
- if (ap != NULL) {
-#ifdef CONFIG_IP_DCCP_DEBUG
- memset(ap, 0xFF, sizeof(*ap) + ap->dccpap_buf_len);
-#endif
- kfree(ap);
- }
-}
-
-static inline u8 dccp_ackpkts_state(const struct dccp_ackpkts *ap,
- const unsigned int index)
-{
- return ap->dccpap_buf[index] & DCCP_ACKPKTS_STATE_MASK;
-}
-
-static inline u8 dccp_ackpkts_len(const struct dccp_ackpkts *ap,
- const unsigned int index)
-{
- return ap->dccpap_buf[index] & DCCP_ACKPKTS_LEN_MASK;
-}
-
-/*
- * If several packets are missing, the HC-Receiver may prefer to enter multiple
- * bytes with run length 0, rather than a single byte with a larger run length;
- * this simplifies table updates if one of the missing packets arrives.
- */
-static inline int dccp_ackpkts_set_buf_head_state(struct dccp_ackpkts *ap,
- const unsigned int packets,
- const unsigned char state)
-{
- unsigned int gap;
- signed long new_head;
-
- if (ap->dccpap_buf_vector_len + packets > ap->dccpap_buf_len)
- return -ENOBUFS;
-
- gap = packets - 1;
- new_head = ap->dccpap_buf_head - packets;
-
- if (new_head < 0) {
- if (gap > 0) {
- memset(ap->dccpap_buf, DCCP_ACKPKTS_STATE_NOT_RECEIVED,
- gap + new_head + 1);
- gap = -new_head;
- }
- new_head += ap->dccpap_buf_len;
- }
-
- ap->dccpap_buf_head = new_head;
-
- if (gap > 0)
- memset(ap->dccpap_buf + ap->dccpap_buf_head + 1,
- DCCP_ACKPKTS_STATE_NOT_RECEIVED, gap);
-
- ap->dccpap_buf[ap->dccpap_buf_head] = state;
- ap->dccpap_buf_vector_len += packets;
- return 0;
-}
-
-/*
- * Implements the draft-ietf-dccp-spec-11.txt Appendix A
- */
-int dccp_ackpkts_add(struct dccp_ackpkts *ap, const struct sock *sk,
- u64 ackno, u8 state)
-{
- /*
- * Check at the right places if the buffer is full, if it is, tell the
- * caller to start dropping packets till the HC-Sender acks our ACK
- * vectors, when we will free up space in dccpap_buf.
- *
- * We may well decide to do buffer compression, etc, but for now lets
- * just drop.
- *
- * From Appendix A:
- *
- * Of course, the circular buffer may overflow, either when the
- * HC-Sender is sending data at a very high rate, when the
- * HC-Receiver's acknowledgements are not reaching the HC-Sender,
- * or when the HC-Sender is forgetting to acknowledge those acks
- * (so the HC-Receiver is unable to clean up old state). In this
- * case, the HC-Receiver should either compress the buffer (by
- * increasing run lengths when possible), transfer its state to
- * a larger buffer, or, as a last resort, drop all received
- * packets, without processing them whatsoever, until its buffer
- * shrinks again.
- */
-
- /* See if this is the first ackno being inserted */
- if (ap->dccpap_buf_vector_len == 0) {
- ap->dccpap_buf[ap->dccpap_buf_head] = state;
- ap->dccpap_buf_vector_len = 1;
- } else if (after48(ackno, ap->dccpap_buf_ackno)) {
- const u64 delta = dccp_delta_seqno(ap->dccpap_buf_ackno,
- ackno);
-
- /*
- * Look if the state of this packet is the same as the
- * previous ackno and if so if we can bump the head len.
- */
- if (delta == 1 &&
- dccp_ackpkts_state(ap, ap->dccpap_buf_head) == state &&
- (dccp_ackpkts_len(ap, ap->dccpap_buf_head) <
- DCCP_ACKPKTS_LEN_MASK))
- ap->dccpap_buf[ap->dccpap_buf_head]++;
- else if (dccp_ackpkts_set_buf_head_state(ap, delta, state))
- return -ENOBUFS;
- } else {
- /*
- * A.1.2. Old Packets
- *
- * When a packet with Sequence Number S arrives, and
- * S <= buf_ackno, the HC-Receiver will scan the table
- * for the byte corresponding to S. (Indexing structures
- * could reduce the complexity of this scan.)
- */
- u64 delta = dccp_delta_seqno(ackno, ap->dccpap_buf_ackno);
- unsigned int index = ap->dccpap_buf_head;
-
- while (1) {
- const u8 len = dccp_ackpkts_len(ap, index);
- const u8 state = dccp_ackpkts_state(ap, index);
- /*
- * valid packets not yet in dccpap_buf have a reserved
- * entry, with a len equal to 0.
- */
- if (state == DCCP_ACKPKTS_STATE_NOT_RECEIVED &&
- len == 0 && delta == 0) { /* Found our
- reserved seat! */
- dccp_pr_debug("Found %llu reserved seat!\n",
- (unsigned long long) ackno);
- ap->dccpap_buf[index] = state;
- goto out;
- }
- /* len == 0 means one packet */
- if (delta < len + 1)
- goto out_duplicate;
-
- delta -= len + 1;
- if (++index == ap->dccpap_buf_len)
- index = 0;
- }
- }
-
- ap->dccpap_buf_ackno = ackno;
- dccp_timestamp(sk, &ap->dccpap_time);
-out:
- dccp_pr_debug("");
- dccp_ackpkts_print(ap);
- return 0;
-
-out_duplicate:
- /* Duplicate packet */
- dccp_pr_debug("Received a dup or already considered lost "
- "packet: %llu\n", (unsigned long long) ackno);
- return -EILSEQ;
-}
-
-#ifdef CONFIG_IP_DCCP_DEBUG
-void dccp_ackvector_print(const u64 ackno, const unsigned char *vector,
- int len)
-{
- if (!dccp_debug)
- return;
-
- printk("ACK vector len=%d, ackno=%llu |", len,
- (unsigned long long) ackno);
-
- while (len--) {
- const u8 state = (*vector & DCCP_ACKPKTS_STATE_MASK) >> 6;
- const u8 rl = (*vector & DCCP_ACKPKTS_LEN_MASK);
-
- printk("%d,%d|", state, rl);
- ++vector;
- }
-
- printk("\n");
-}
-
-void dccp_ackpkts_print(const struct dccp_ackpkts *ap)
-{
- dccp_ackvector_print(ap->dccpap_buf_ackno,
- ap->dccpap_buf + ap->dccpap_buf_head,
- ap->dccpap_buf_vector_len);
-}
-#endif
-
-static void dccp_ackpkts_trow_away_ack_record(struct dccp_ackpkts *ap)
-{
- /*
- * As we're keeping track of the ack vector size
- * (dccpap_buf_vector_len) and the sent ack vector size
- * (dccpap_ack_vector_len) we don't need dccpap_buf_tail at all, but
- * keep this code here as in the future we'll implement a vector of
- * ack records, as suggested in draft-ietf-dccp-spec-11.txt
- * Appendix A. -acme
- */
-#if 0
- ap->dccpap_buf_tail = ap->dccpap_ack_ptr + 1;
- if (ap->dccpap_buf_tail >= ap->dccpap_buf_len)
- ap->dccpap_buf_tail -= ap->dccpap_buf_len;
-#endif
- ap->dccpap_buf_vector_len -= ap->dccpap_ack_vector_len;
-}
-
-void dccp_ackpkts_check_rcv_ackno(struct dccp_ackpkts *ap, struct sock *sk,
- u64 ackno)
-{
- /* Check if we actually sent an ACK vector */
- if (ap->dccpap_ack_seqno == DCCP_MAX_SEQNO + 1)
- return;
-
- if (ackno == ap->dccpap_ack_seqno) {
-#ifdef CONFIG_IP_DCCP_DEBUG
- struct dccp_sock *dp = dccp_sk(sk);
- const char *debug_prefix = dp->dccps_role == DCCP_ROLE_CLIENT ?
- "CLIENT rx ack: " : "server rx ack: ";
-#endif
- dccp_pr_debug("%sACK packet 0, len=%d, ack_seqno=%llu, "
- "ack_ackno=%llu, ACKED!\n",
- debug_prefix, 1,
- (unsigned long long) ap->dccpap_ack_seqno,
- (unsigned long long) ap->dccpap_ack_ackno);
- dccp_ackpkts_trow_away_ack_record(ap);
- ap->dccpap_ack_seqno = DCCP_MAX_SEQNO + 1;
- }
-}
-
-static void dccp_ackpkts_check_rcv_ackvector(struct dccp_ackpkts *ap,
- struct sock *sk, u64 ackno,
- const unsigned char len,
- const unsigned char *vector)
-{
- unsigned char i;
-
- /* Check if we actually sent an ACK vector */
- if (ap->dccpap_ack_seqno == DCCP_MAX_SEQNO + 1)
- return;
- /*
- * We're in the receiver half connection, so if the received an ACK
- * vector ackno (e.g. 50) before dccpap_ack_seqno (e.g. 52), we're
- * not interested.
- *
- * Extra explanation with example:
- *
- * if we received an ACK vector with ackno 50, it can only be acking
- * 50, 49, 48, etc, not 52 (the seqno for the ACK vector we sent).
- */
- /* dccp_pr_debug("is %llu < %llu? ", ackno, ap->dccpap_ack_seqno); */
- if (before48(ackno, ap->dccpap_ack_seqno)) {
- /* dccp_pr_debug_cat("yes\n"); */
- return;
- }
- /* dccp_pr_debug_cat("no\n"); */
-
- i = len;
- while (i--) {
- const u8 rl = (*vector & DCCP_ACKPKTS_LEN_MASK);
- u64 ackno_end_rl;
-
- dccp_set_seqno(&ackno_end_rl, ackno - rl);
-
- /*
- * dccp_pr_debug("is %llu <= %llu <= %llu? ", ackno_end_rl,
- * ap->dccpap_ack_seqno, ackno);
- */
- if (between48(ap->dccpap_ack_seqno, ackno_end_rl, ackno)) {
- const u8 state = (*vector &
- DCCP_ACKPKTS_STATE_MASK) >> 6;
- /* dccp_pr_debug_cat("yes\n"); */
-
- if (state != DCCP_ACKPKTS_STATE_NOT_RECEIVED) {
-#ifdef CONFIG_IP_DCCP_DEBUG
- struct dccp_sock *dp = dccp_sk(sk);
- const char *debug_prefix =
- dp->dccps_role == DCCP_ROLE_CLIENT ?
- "CLIENT rx ack: " : "server rx ack: ";
-#endif
- dccp_pr_debug("%sACK vector 0, len=%d, "
- "ack_seqno=%llu, ack_ackno=%llu, "
- "ACKED!\n",
- debug_prefix, len,
- (unsigned long long)
- ap->dccpap_ack_seqno,
- (unsigned long long)
- ap->dccpap_ack_ackno);
- dccp_ackpkts_trow_away_ack_record(ap);
- }
- /*
- * If dccpap_ack_seqno was not received, no problem
- * we'll send another ACK vector.
- */
- ap->dccpap_ack_seqno = DCCP_MAX_SEQNO + 1;
- break;
- }
- /* dccp_pr_debug_cat("no\n"); */
-
- dccp_set_seqno(&ackno, ackno_end_rl - 1);
- ++vector;
- }
-}
diff --git a/net/dccp/output.c b/net/dccp/output.c
index ea6d0e9..4786bdc 100644
--- a/net/dccp/output.c
+++ b/net/dccp/output.c
@@ -16,6 +16,7 @@
#include <net/sock.h>
+#include "ackvec.h"
#include "ccid.h"
#include "dccp.h"
@@ -85,7 +86,7 @@ int dccp_transmit_skb(struct sock *sk, struct sk_buff *skb)
switch (dcb->dccpd_type) {
case DCCP_PKT_REQUEST:
dccp_hdr_request(skb)->dccph_req_service =
- dcb->dccpd_service;
+ dp->dccps_service;
break;
case DCCP_PKT_RESET:
dccp_hdr_reset(skb)->dccph_reset_code =
@@ -225,7 +226,6 @@ int dccp_write_xmit(struct sock *sk, struct sk_buff *skb, long *timeo)
err = dccp_wait_for_ccid(sk, skb, timeo);
if (err == 0) {
- const struct dccp_ackpkts *ap = dp->dccps_hc_rx_ackpkts;
struct dccp_skb_cb *dcb = DCCP_SKB_CB(skb);
const int len = skb->len;
@@ -236,15 +236,7 @@ int dccp_write_xmit(struct sock *sk, struct sk_buff *skb, long *timeo)
inet_csk(sk)->icsk_rto,
DCCP_RTO_MAX);
dcb->dccpd_type = DCCP_PKT_DATAACK;
- /*
- * FIXME: we really should have a
- * dccps_ack_pending or use icsk.
- */
- } else if (inet_csk_ack_scheduled(sk) ||
- dp->dccps_timestamp_echo != 0 ||
- (dp->dccps_options.dccpo_send_ack_vector &&
- ap->dccpap_buf_ackno != DCCP_MAX_SEQNO + 1 &&
- ap->dccpap_ack_seqno == DCCP_MAX_SEQNO + 1))
+ } else if (dccp_ack_pending(sk))
dcb->dccpd_type = DCCP_PKT_DATAACK;
else
dcb->dccpd_type = DCCP_PKT_DATA;
@@ -270,6 +262,7 @@ struct sk_buff *dccp_make_response(struct sock *sk, struct dst_entry *dst,
struct request_sock *req)
{
struct dccp_hdr *dh;
+ struct dccp_request_sock *dreq;
const int dccp_header_size = sizeof(struct dccp_hdr) +
sizeof(struct dccp_hdr_ext) +
sizeof(struct dccp_hdr_response);
@@ -285,8 +278,9 @@ struct sk_buff *dccp_make_response(struct sock *sk, struct dst_entry *dst,
skb->dst = dst_clone(dst);
skb->csum = 0;
+ dreq = dccp_rsk(req);
DCCP_SKB_CB(skb)->dccpd_type = DCCP_PKT_RESPONSE;
- DCCP_SKB_CB(skb)->dccpd_seq = dccp_rsk(req)->dreq_iss;
+ DCCP_SKB_CB(skb)->dccpd_seq = dreq->dreq_iss;
dccp_insert_options(sk, skb);
skb->h.raw = skb_push(skb, dccp_header_size);
@@ -300,8 +294,9 @@ struct sk_buff *dccp_make_response(struct sock *sk, struct dst_entry *dst,
DCCP_SKB_CB(skb)->dccpd_opt_len) / 4;
dh->dccph_type = DCCP_PKT_RESPONSE;
dh->dccph_x = 1;
- dccp_hdr_set_seq(dh, dccp_rsk(req)->dreq_iss);
- dccp_hdr_set_ack(dccp_hdr_ack_bits(skb), dccp_rsk(req)->dreq_isr);
+ dccp_hdr_set_seq(dh, dreq->dreq_iss);
+ dccp_hdr_set_ack(dccp_hdr_ack_bits(skb), dreq->dreq_isr);
+ dccp_hdr_response(skb)->dccph_resp_service = dreq->dreq_service;
dh->dccph_checksum = dccp_v4_checksum(skb, inet_rsk(req)->loc_addr,
inet_rsk(req)->rmt_addr);
@@ -397,9 +392,6 @@ int dccp_connect(struct sock *sk)
skb_reserve(skb, MAX_DCCP_HEADER);
DCCP_SKB_CB(skb)->dccpd_type = DCCP_PKT_REQUEST;
- /* FIXME: set service to something meaningful, coming
- * from userspace*/
- DCCP_SKB_CB(skb)->dccpd_service = 0;
skb->csum = 0;
skb_set_owner_w(skb, sk);
diff --git a/net/dccp/proto.c b/net/dccp/proto.c
index 18a0e69..a1cfd0e 100644
--- a/net/dccp/proto.c
+++ b/net/dccp/proto.c
@@ -94,7 +94,15 @@ EXPORT_SYMBOL_GPL(dccp_state_name);
static inline int dccp_listen_start(struct sock *sk)
{
- dccp_sk(sk)->dccps_role = DCCP_ROLE_LISTEN;
+ struct dccp_sock *dp = dccp_sk(sk);
+
+ dp->dccps_role = DCCP_ROLE_LISTEN;
+ /*
+ * Apps need to use setsockopt(DCCP_SOCKOPT_SERVICE)
+ * before calling listen()
+ */
+ if (dccp_service_not_initialized(sk))
+ return -EPROTO;
return inet_csk_listen_start(sk, TCP_SYNQ_HSIZE);
}
@@ -202,6 +210,42 @@ int dccp_ioctl(struct sock *sk, int cmd, unsigned long arg)
return -ENOIOCTLCMD;
}
+static int dccp_setsockopt_service(struct sock *sk, const u32 service,
+ char __user *optval, int optlen)
+{
+ struct dccp_sock *dp = dccp_sk(sk);
+ struct dccp_service_list *sl = NULL;
+
+ if (service == DCCP_SERVICE_INVALID_VALUE ||
+ optlen > DCCP_SERVICE_LIST_MAX_LEN * sizeof(u32))
+ return -EINVAL;
+
+ if (optlen > sizeof(service)) {
+ sl = kmalloc(optlen, GFP_KERNEL);
+ if (sl == NULL)
+ return -ENOMEM;
+
+ sl->dccpsl_nr = optlen / sizeof(u32) - 1;
+ if (copy_from_user(sl->dccpsl_list,
+ optval + sizeof(service),
+ optlen - sizeof(service)) ||
+ dccp_list_has_service(sl, DCCP_SERVICE_INVALID_VALUE)) {
+ kfree(sl);
+ return -EFAULT;
+ }
+ }
+
+ lock_sock(sk);
+ dp->dccps_service = service;
+
+ if (dp->dccps_service_list != NULL)
+ kfree(dp->dccps_service_list);
+
+ dp->dccps_service_list = sl;
+ release_sock(sk);
+ return 0;
+}
+
int dccp_setsockopt(struct sock *sk, int level, int optname,
char __user *optval, int optlen)
{
@@ -218,8 +262,10 @@ int dccp_setsockopt(struct sock *sk, int level, int optname,
if (get_user(val, (int __user *)optval))
return -EFAULT;
- lock_sock(sk);
+ if (optname == DCCP_SOCKOPT_SERVICE)
+ return dccp_setsockopt_service(sk, val, optval, optlen);
+ lock_sock(sk);
dp = dccp_sk(sk);
err = 0;
@@ -236,6 +282,37 @@ int dccp_setsockopt(struct sock *sk, int level, int optname,
return err;
}
+static int dccp_getsockopt_service(struct sock *sk, int len,
+ u32 __user *optval,
+ int __user *optlen)
+{
+ const struct dccp_sock *dp = dccp_sk(sk);
+ const struct dccp_service_list *sl;
+ int err = -ENOENT, slen = 0, total_len = sizeof(u32);
+
+ lock_sock(sk);
+ if (dccp_service_not_initialized(sk))
+ goto out;
+
+ if ((sl = dp->dccps_service_list) != NULL) {
+ slen = sl->dccpsl_nr * sizeof(u32);
+ total_len += slen;
+ }
+
+ err = -EINVAL;
+ if (total_len > len)
+ goto out;
+
+ err = 0;
+ if (put_user(total_len, optlen) ||
+ put_user(dp->dccps_service, optval) ||
+ (sl != NULL && copy_to_user(optval + 1, sl->dccpsl_list, slen)))
+ err = -EFAULT;
+out:
+ release_sock(sk);
+ return err;
+}
+
int dccp_getsockopt(struct sock *sk, int level, int optname,
char __user *optval, int __user *optlen)
{
@@ -248,8 +325,7 @@ int dccp_getsockopt(struct sock *sk, int level, int optname,
if (get_user(len, optlen))
return -EFAULT;
- len = min_t(unsigned int, len, sizeof(int));
- if (len < 0)
+ if (len < sizeof(int))
return -EINVAL;
dp = dccp_sk(sk);
@@ -257,7 +333,17 @@ int dccp_getsockopt(struct sock *sk, int level, int optname,
switch (optname) {
case DCCP_SOCKOPT_PACKET_SIZE:
val = dp->dccps_packet_size;
+ len = sizeof(dp->dccps_packet_size);
break;
+ case DCCP_SOCKOPT_SERVICE:
+ return dccp_getsockopt_service(sk, len,
+ (u32 __user *)optval, optlen);
+ case 128 ... 191:
+ return ccid_hc_rx_getsockopt(dp->dccps_hc_rx_ccid, sk, optname,
+ len, (u32 __user *)optval, optlen);
+ case 192 ... 255:
+ return ccid_hc_tx_getsockopt(dp->dccps_hc_tx_ccid, sk, optname,
+ len, (u32 __user *)optval, optlen);
default:
return -ENOPROTOOPT;
}
diff --git a/net/ipv4/fib_trie.c b/net/ipv4/fib_trie.c
index 1b63b48..50c0519 100644
--- a/net/ipv4/fib_trie.c
+++ b/net/ipv4/fib_trie.c
@@ -43,7 +43,7 @@
* 2 of the License, or (at your option) any later version.
*/
-#define VERSION "0.403"
+#define VERSION "0.404"
#include <linux/config.h>
#include <asm/uaccess.h>
@@ -224,7 +224,7 @@ static inline int tkey_mismatch(t_key a, int offset, t_key b)
Consider a node 'n' and its parent 'tp'.
If n is a leaf, every bit in its key is significant. Its presence is
- necessitaded by path compression, since during a tree traversal (when
+ necessitated by path compression, since during a tree traversal (when
searching for a leaf - unless we are doing an insertion) we will completely
ignore all skipped bits we encounter. Thus we need to verify, at the end of
a potentially successful search, that we have indeed been walking the
@@ -836,11 +836,12 @@ static void trie_init(struct trie *t)
#endif
}
-/* readside most use rcu_read_lock currently dump routines
+/* readside must use rcu_read_lock currently dump routines
via get_fa_head and dump */
-static struct leaf_info *find_leaf_info(struct hlist_head *head, int plen)
+static struct leaf_info *find_leaf_info(struct leaf *l, int plen)
{
+ struct hlist_head *head = &l->list;
struct hlist_node *node;
struct leaf_info *li;
@@ -853,7 +854,7 @@ static struct leaf_info *find_leaf_info(struct hlist_head *head, int plen)
static inline struct list_head * get_fa_head(struct leaf *l, int plen)
{
- struct leaf_info *li = find_leaf_info(&l->list, plen);
+ struct leaf_info *li = find_leaf_info(l, plen);
if (!li)
return NULL;
@@ -1085,7 +1086,7 @@ fib_insert_node(struct trie *t, int *err, u32 key, int plen)
}
if (tp && tp->pos + tp->bits > 32)
- printk("ERROR tp=%p pos=%d, bits=%d, key=%0x plen=%d\n",
+ printk(KERN_WARNING "fib_trie tp=%p pos=%d, bits=%d, key=%0x plen=%d\n",
tp, tp->pos, tp->bits, key, plen);
/* Rebalance the trie */
@@ -1248,7 +1249,7 @@ err:
}
-/* should be clalled with rcu_read_lock */
+/* should be called with rcu_read_lock */
static inline int check_leaf(struct trie *t, struct leaf *l,
t_key key, int *plen, const struct flowi *flp,
struct fib_result *res)
@@ -1590,7 +1591,7 @@ fn_trie_delete(struct fib_table *tb, struct rtmsg *r, struct kern_rta *rta,
rtmsg_fib(RTM_DELROUTE, htonl(key), fa, plen, tb->tb_id, nlhdr, req);
l = fib_find_node(t, key);
- li = find_leaf_info(&l->list, plen);
+ li = find_leaf_info(l, plen);
list_del_rcu(&fa->fa_list);
@@ -1714,7 +1715,6 @@ static int fn_trie_flush(struct fib_table *tb)
t->revision++;
- rcu_read_lock();
for (h = 0; (l = nextleaf(t, l)) != NULL; h++) {
found += trie_flush_leaf(t, l);
@@ -1722,7 +1722,6 @@ static int fn_trie_flush(struct fib_table *tb)
trie_leaf_remove(t, ll->key);
ll = l;
}
- rcu_read_unlock();
if (ll && hlist_empty(&ll->list))
trie_leaf_remove(t, ll->key);
@@ -1833,16 +1832,7 @@ static int fn_trie_dump_fa(t_key key, int plen, struct list_head *fah, struct fi
i++;
continue;
}
- if (fa->fa_info->fib_nh == NULL) {
- printk("Trie error _fib_nh=NULL in fa[%d] k=%08x plen=%d\n", i, key, plen);
- i++;
- continue;
- }
- if (fa->fa_info == NULL) {
- printk("Trie error fa_info=NULL in fa[%d] k=%08x plen=%d\n", i, key, plen);
- i++;
- continue;
- }
+ BUG_ON(!fa->fa_info);
if (fib_dump_info(skb, NETLINK_CB(cb->skb).pid,
cb->nlh->nlmsg_seq,
@@ -1965,7 +1955,7 @@ struct fib_table * __init fib_hash_init(int id)
trie_main = t;
if (id == RT_TABLE_LOCAL)
- printk("IPv4 FIB: Using LC-trie version %s\n", VERSION);
+ printk(KERN_INFO "IPv4 FIB: Using LC-trie version %s\n", VERSION);
return tb;
}
@@ -2029,7 +2019,7 @@ static struct node *fib_trie_get_first(struct fib_trie_iter *iter,
iter->tnode = (struct tnode *) n;
iter->trie = t;
iter->index = 0;
- iter->depth = 0;
+ iter->depth = 1;
return n;
}
return NULL;
@@ -2274,11 +2264,12 @@ static int fib_trie_seq_show(struct seq_file *seq, void *v)
seq_puts(seq, "<local>:\n");
else
seq_puts(seq, "<main>:\n");
- } else {
- seq_indent(seq, iter->depth-1);
- seq_printf(seq, " +-- %d.%d.%d.%d/%d\n",
- NIPQUAD(prf), tn->pos);
- }
+ }
+ seq_indent(seq, iter->depth-1);
+ seq_printf(seq, " +-- %d.%d.%d.%d/%d %d %d %d\n",
+ NIPQUAD(prf), tn->pos, tn->bits, tn->full_children,
+ tn->empty_children);
+
} else {
struct leaf *l = (struct leaf *) n;
int i;
@@ -2287,7 +2278,7 @@ static int fib_trie_seq_show(struct seq_file *seq, void *v)
seq_indent(seq, iter->depth);
seq_printf(seq, " |-- %d.%d.%d.%d\n", NIPQUAD(val));
for (i = 32; i >= 0; i--) {
- struct leaf_info *li = find_leaf_info(&l->list, i);
+ struct leaf_info *li = find_leaf_info(l, i);
if (li) {
struct fib_alias *fa;
list_for_each_entry_rcu(fa, &li->falh, fa_list) {
@@ -2383,7 +2374,7 @@ static int fib_route_seq_show(struct seq_file *seq, void *v)
return 0;
for (i=32; i>=0; i--) {
- struct leaf_info *li = find_leaf_info(&l->list, i);
+ struct leaf_info *li = find_leaf_info(l, i);
struct fib_alias *fa;
u32 mask, prefix;
diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c
index 44607f4..70c44e4 100644
--- a/net/ipv4/igmp.c
+++ b/net/ipv4/igmp.c
@@ -1603,7 +1603,7 @@ static void ip_mc_clear_src(struct ip_mc_list *pmc)
}
pmc->sources = NULL;
pmc->sfmode = MCAST_EXCLUDE;
- pmc->sfcount[MCAST_EXCLUDE] = 0;
+ pmc->sfcount[MCAST_INCLUDE] = 0;
pmc->sfcount[MCAST_EXCLUDE] = 1;
}
diff --git a/net/ipv4/ipvs/ip_vs_conn.c b/net/ipv4/ipvs/ip_vs_conn.c
index e11952e..f828fa2 100644
--- a/net/ipv4/ipvs/ip_vs_conn.c
+++ b/net/ipv4/ipvs/ip_vs_conn.c
@@ -196,6 +196,7 @@ static inline struct ip_vs_conn *__ip_vs_conn_in_get
list_for_each_entry(cp, &ip_vs_conn_tab[hash], c_list) {
if (s_addr==cp->caddr && s_port==cp->cport &&
d_port==cp->vport && d_addr==cp->vaddr &&
+ ((!s_port) ^ (!(cp->flags & IP_VS_CONN_F_NO_CPORT))) &&
protocol==cp->protocol) {
/* HIT */
atomic_inc(&cp->refcnt);
@@ -227,6 +228,40 @@ struct ip_vs_conn *ip_vs_conn_in_get
return cp;
}
+/* Get reference to connection template */
+struct ip_vs_conn *ip_vs_ct_in_get
+(int protocol, __u32 s_addr, __u16 s_port, __u32 d_addr, __u16 d_port)
+{
+ unsigned hash;
+ struct ip_vs_conn *cp;
+
+ hash = ip_vs_conn_hashkey(protocol, s_addr, s_port);
+
+ ct_read_lock(hash);
+
+ list_for_each_entry(cp, &ip_vs_conn_tab[hash], c_list) {
+ if (s_addr==cp->caddr && s_port==cp->cport &&
+ d_port==cp->vport && d_addr==cp->vaddr &&
+ cp->flags & IP_VS_CONN_F_TEMPLATE &&
+ protocol==cp->protocol) {
+ /* HIT */
+ atomic_inc(&cp->refcnt);
+ goto out;
+ }
+ }
+ cp = NULL;
+
+ out:
+ ct_read_unlock(hash);
+
+ IP_VS_DBG(7, "template lookup/in %s %u.%u.%u.%u:%d->%u.%u.%u.%u:%d %s\n",
+ ip_vs_proto_name(protocol),
+ NIPQUAD(s_addr), ntohs(s_port),
+ NIPQUAD(d_addr), ntohs(d_port),
+ cp?"hit":"not hit");
+
+ return cp;
+}
/*
* Gets ip_vs_conn associated with supplied parameters in the ip_vs_conn_tab.
@@ -367,7 +402,7 @@ ip_vs_bind_dest(struct ip_vs_conn *cp, struct ip_vs_dest *dest)
atomic_read(&dest->refcnt));
/* Update the connection counters */
- if (cp->cport || (cp->flags & IP_VS_CONN_F_NO_CPORT)) {
+ if (!(cp->flags & IP_VS_CONN_F_TEMPLATE)) {
/* It is a normal connection, so increase the inactive
connection counter because it is in TCP SYNRECV
state (inactive) or other protocol inacive state */
@@ -406,7 +441,7 @@ static inline void ip_vs_unbind_dest(struct ip_vs_conn *cp)
atomic_read(&dest->refcnt));
/* Update the connection counters */
- if (cp->cport || (cp->flags & IP_VS_CONN_F_NO_CPORT)) {
+ if (!(cp->flags & IP_VS_CONN_F_TEMPLATE)) {
/* It is a normal connection, so decrease the inactconns
or activeconns counter */
if (cp->flags & IP_VS_CONN_F_INACTIVE) {
@@ -467,7 +502,7 @@ int ip_vs_check_template(struct ip_vs_conn *ct)
/*
* Invalidate the connection template
*/
- if (ct->cport) {
+ if (ct->vport != 65535) {
if (ip_vs_conn_unhash(ct)) {
ct->dport = 65535;
ct->vport = 65535;
@@ -776,7 +811,7 @@ void ip_vs_random_dropentry(void)
ct_write_lock_bh(hash);
list_for_each_entry(cp, &ip_vs_conn_tab[hash], c_list) {
- if (!cp->cport && !(cp->flags & IP_VS_CONN_F_NO_CPORT))
+ if (cp->flags & IP_VS_CONN_F_TEMPLATE)
/* connection template */
continue;
diff --git a/net/ipv4/ipvs/ip_vs_core.c b/net/ipv4/ipvs/ip_vs_core.c
index 3ac7eec..981cc32 100644
--- a/net/ipv4/ipvs/ip_vs_core.c
+++ b/net/ipv4/ipvs/ip_vs_core.c
@@ -243,10 +243,10 @@ ip_vs_sched_persist(struct ip_vs_service *svc,
if (ports[1] == svc->port) {
/* Check if a template already exists */
if (svc->port != FTPPORT)
- ct = ip_vs_conn_in_get(iph->protocol, snet, 0,
+ ct = ip_vs_ct_in_get(iph->protocol, snet, 0,
iph->daddr, ports[1]);
else
- ct = ip_vs_conn_in_get(iph->protocol, snet, 0,
+ ct = ip_vs_ct_in_get(iph->protocol, snet, 0,
iph->daddr, 0);
if (!ct || !ip_vs_check_template(ct)) {
@@ -272,14 +272,14 @@ ip_vs_sched_persist(struct ip_vs_service *svc,
iph->daddr,
ports[1],
dest->addr, dest->port,
- 0,
+ IP_VS_CONN_F_TEMPLATE,
dest);
else
ct = ip_vs_conn_new(iph->protocol,
snet, 0,
iph->daddr, 0,
dest->addr, 0,
- 0,
+ IP_VS_CONN_F_TEMPLATE,
dest);
if (ct == NULL)
return NULL;
@@ -298,10 +298,10 @@ ip_vs_sched_persist(struct ip_vs_service *svc,
* port zero template: <protocol,caddr,0,vaddr,0,daddr,0>
*/
if (svc->fwmark)
- ct = ip_vs_conn_in_get(IPPROTO_IP, snet, 0,
+ ct = ip_vs_ct_in_get(IPPROTO_IP, snet, 0,
htonl(svc->fwmark), 0);
else
- ct = ip_vs_conn_in_get(iph->protocol, snet, 0,
+ ct = ip_vs_ct_in_get(iph->protocol, snet, 0,
iph->daddr, 0);
if (!ct || !ip_vs_check_template(ct)) {
@@ -326,14 +326,14 @@ ip_vs_sched_persist(struct ip_vs_service *svc,
snet, 0,
htonl(svc->fwmark), 0,
dest->addr, 0,
- 0,
+ IP_VS_CONN_F_TEMPLATE,
dest);
else
ct = ip_vs_conn_new(iph->protocol,
snet, 0,
iph->daddr, 0,
dest->addr, 0,
- 0,
+ IP_VS_CONN_F_TEMPLATE,
dest);
if (ct == NULL)
return NULL;
diff --git a/net/ipv4/ipvs/ip_vs_sync.c b/net/ipv4/ipvs/ip_vs_sync.c
index 574d1f5..2e5ced3 100644
--- a/net/ipv4/ipvs/ip_vs_sync.c
+++ b/net/ipv4/ipvs/ip_vs_sync.c
@@ -297,16 +297,24 @@ static void ip_vs_process_message(const char *buffer, const size_t buflen)
p = (char *)buffer + sizeof(struct ip_vs_sync_mesg);
for (i=0; i<m->nr_conns; i++) {
+ unsigned flags;
+
s = (struct ip_vs_sync_conn *)p;
- cp = ip_vs_conn_in_get(s->protocol,
- s->caddr, s->cport,
- s->vaddr, s->vport);
+ flags = ntohs(s->flags);
+ if (!(flags & IP_VS_CONN_F_TEMPLATE))
+ cp = ip_vs_conn_in_get(s->protocol,
+ s->caddr, s->cport,
+ s->vaddr, s->vport);
+ else
+ cp = ip_vs_ct_in_get(s->protocol,
+ s->caddr, s->cport,
+ s->vaddr, s->vport);
if (!cp) {
cp = ip_vs_conn_new(s->protocol,
s->caddr, s->cport,
s->vaddr, s->vport,
s->daddr, s->dport,
- ntohs(s->flags), NULL);
+ flags, NULL);
if (!cp) {
IP_VS_ERR("ip_vs_conn_new failed\n");
return;
@@ -315,11 +323,11 @@ static void ip_vs_process_message(const char *buffer, const size_t buflen)
} else if (!cp->dest) {
/* it is an entry created by the synchronization */
cp->state = ntohs(s->state);
- cp->flags = ntohs(s->flags) | IP_VS_CONN_F_HASHED;
+ cp->flags = flags | IP_VS_CONN_F_HASHED;
} /* Note that we don't touch its state and flags
if it is a normal entry. */
- if (ntohs(s->flags) & IP_VS_CONN_F_SEQ_MASK) {
+ if (flags & IP_VS_CONN_F_SEQ_MASK) {
opt = (struct ip_vs_sync_conn_options *)&s[1];
memcpy(&cp->in_seq, opt, sizeof(*opt));
p += FULL_CONN_SIZE;
diff --git a/net/ipv4/netfilter/Kconfig b/net/ipv4/netfilter/Kconfig
index 30aa8e2..3cf9b45 100644
--- a/net/ipv4/netfilter/Kconfig
+++ b/net/ipv4/netfilter/Kconfig
@@ -51,6 +51,14 @@ config IP_NF_CONNTRACK_EVENTS
IF unsure, say `N'.
+config IP_NF_CONNTRACK_NETLINK
+ tristate 'Connection tracking netlink interface'
+ depends on IP_NF_CONNTRACK && NETFILTER_NETLINK
+ depends on IP_NF_CONNTRACK!=y || NETFILTER_NETLINK!=m
+ help
+ This option enables support for a netlink-based userspace interface
+
+
config IP_NF_CT_PROTO_SCTP
tristate 'SCTP protocol connection tracking support (EXPERIMENTAL)'
depends on IP_NF_CONNTRACK && EXPERIMENTAL
@@ -129,6 +137,22 @@ config IP_NF_AMANDA
To compile it as a module, choose M here. If unsure, say Y.
+config IP_NF_PPTP
+ tristate 'PPTP protocol support'
+ help
+ This module adds support for PPTP (Point to Point Tunnelling
+ Protocol, RFC2637) conncection tracking and NAT.
+
+ If you are running PPTP sessions over a stateful firewall or NAT
+ box, you may want to enable this feature.
+
+ Please note that not all PPTP modes of operation are supported yet.
+ For more info, read top of the file
+ net/ipv4/netfilter/ip_conntrack_pptp.c
+
+ If you want to compile it as a module, say M here and read
+ Documentation/modules.txt. If unsure, say `N'.
+
config IP_NF_QUEUE
tristate "IP Userspace queueing via NETLINK (OBSOLETE)"
help
@@ -613,6 +637,12 @@ config IP_NF_NAT_AMANDA
default IP_NF_NAT if IP_NF_AMANDA=y
default m if IP_NF_AMANDA=m
+config IP_NF_NAT_PPTP
+ tristate
+ depends on IP_NF_NAT!=n && IP_NF_PPTP!=n
+ default IP_NF_NAT if IP_NF_PPTP=y
+ default m if IP_NF_PPTP=m
+
# mangle + specific targets
config IP_NF_MANGLE
tristate "Packet mangling"
@@ -774,11 +804,5 @@ config IP_NF_ARP_MANGLE
Allows altering the ARP packet payload: source and destination
hardware and network addresses.
-config IP_NF_CONNTRACK_NETLINK
- tristate 'Connection tracking netlink interface'
- depends on IP_NF_CONNTRACK && NETFILTER_NETLINK
- help
- This option enables support for a netlink-based userspace interface
-
endmenu
diff --git a/net/ipv4/netfilter/Makefile b/net/ipv4/netfilter/Makefile
index 1ba0db7..3d45d3c 100644
--- a/net/ipv4/netfilter/Makefile
+++ b/net/ipv4/netfilter/Makefile
@@ -6,6 +6,9 @@
ip_conntrack-objs := ip_conntrack_standalone.o ip_conntrack_core.o ip_conntrack_proto_generic.o ip_conntrack_proto_tcp.o ip_conntrack_proto_udp.o ip_conntrack_proto_icmp.o
iptable_nat-objs := ip_nat_standalone.o ip_nat_rule.o ip_nat_core.o ip_nat_helper.o ip_nat_proto_unknown.o ip_nat_proto_tcp.o ip_nat_proto_udp.o ip_nat_proto_icmp.o
+ip_conntrack_pptp-objs := ip_conntrack_helper_pptp.o ip_conntrack_proto_gre.o
+ip_nat_pptp-objs := ip_nat_helper_pptp.o ip_nat_proto_gre.o
+
# connection tracking
obj-$(CONFIG_IP_NF_CONNTRACK) += ip_conntrack.o
@@ -17,6 +20,7 @@ obj-$(CONFIG_IP_NF_CONNTRACK_NETLINK) += ip_conntrack_netlink.o
obj-$(CONFIG_IP_NF_CT_PROTO_SCTP) += ip_conntrack_proto_sctp.o
# connection tracking helpers
+obj-$(CONFIG_IP_NF_PPTP) += ip_conntrack_pptp.o
obj-$(CONFIG_IP_NF_AMANDA) += ip_conntrack_amanda.o
obj-$(CONFIG_IP_NF_TFTP) += ip_conntrack_tftp.o
obj-$(CONFIG_IP_NF_FTP) += ip_conntrack_ftp.o
@@ -24,6 +28,7 @@ obj-$(CONFIG_IP_NF_IRC) += ip_conntrack_irc.o
obj-$(CONFIG_IP_NF_NETBIOS_NS) += ip_conntrack_netbios_ns.o
# NAT helpers
+obj-$(CONFIG_IP_NF_NAT_PPTP) += ip_nat_pptp.o
obj-$(CONFIG_IP_NF_NAT_AMANDA) += ip_nat_amanda.o
obj-$(CONFIG_IP_NF_NAT_TFTP) += ip_nat_tftp.o
obj-$(CONFIG_IP_NF_NAT_FTP) += ip_nat_ftp.o
diff --git a/net/ipv4/netfilter/ip_conntrack_core.c b/net/ipv4/netfilter/ip_conntrack_core.c
index 19cba16..c1f82e0 100644
--- a/net/ipv4/netfilter/ip_conntrack_core.c
+++ b/net/ipv4/netfilter/ip_conntrack_core.c
@@ -233,7 +233,7 @@ __ip_conntrack_expect_find(const struct ip_conntrack_tuple *tuple)
/* Just find a expectation corresponding to a tuple. */
struct ip_conntrack_expect *
-ip_conntrack_expect_find_get(const struct ip_conntrack_tuple *tuple)
+ip_conntrack_expect_find(const struct ip_conntrack_tuple *tuple)
{
struct ip_conntrack_expect *i;
@@ -1143,7 +1143,10 @@ void ip_ct_refresh_acct(struct ip_conntrack *ct,
if (del_timer(&ct->timeout)) {
ct->timeout.expires = jiffies + extra_jiffies;
add_timer(&ct->timeout);
- ip_conntrack_event_cache(IPCT_REFRESH, skb);
+ /* FIXME: We loose some REFRESH events if this function
+ * is called without an skb. I'll fix this later -HW */
+ if (skb)
+ ip_conntrack_event_cache(IPCT_REFRESH, skb);
}
ct_add_counters(ct, ctinfo, skb);
write_unlock_bh(&ip_conntrack_lock);
diff --git a/net/ipv4/netfilter/ip_conntrack_helper_pptp.c b/net/ipv4/netfilter/ip_conntrack_helper_pptp.c
new file mode 100644
index 0000000..79db5b7
--- /dev/null
+++ b/net/ipv4/netfilter/ip_conntrack_helper_pptp.c
@@ -0,0 +1,805 @@
+/*
+ * ip_conntrack_pptp.c - Version 3.0
+ *
+ * Connection tracking support for PPTP (Point to Point Tunneling Protocol).
+ * PPTP is a a protocol for creating virtual private networks.
+ * It is a specification defined by Microsoft and some vendors
+ * working with Microsoft. PPTP is built on top of a modified
+ * version of the Internet Generic Routing Encapsulation Protocol.
+ * GRE is defined in RFC 1701 and RFC 1702. Documentation of
+ * PPTP can be found in RFC 2637
+ *
+ * (C) 2000-2005 by Harald Welte <laforge@gnumonks.org>
+ *
+ * Development of this code funded by Astaro AG (http://www.astaro.com/)
+ *
+ * Limitations:
+ * - We blindly assume that control connections are always
+ * established in PNS->PAC direction. This is a violation
+ * of RFFC2673
+ * - We can only support one single call within each session
+ *
+ * TODO:
+ * - testing of incoming PPTP calls
+ *
+ * Changes:
+ * 2002-02-05 - Version 1.3
+ * - Call ip_conntrack_unexpect_related() from
+ * pptp_destroy_siblings() to destroy expectations in case
+ * CALL_DISCONNECT_NOTIFY or tcp fin packet was seen
+ * (Philip Craig <philipc@snapgear.com>)
+ * - Add Version information at module loadtime
+ * 2002-02-10 - Version 1.6
+ * - move to C99 style initializers
+ * - remove second expectation if first arrives
+ * 2004-10-22 - Version 2.0
+ * - merge Mandrake's 2.6.x port with recent 2.6.x API changes
+ * - fix lots of linear skb assumptions from Mandrake's port
+ * 2005-06-10 - Version 2.1
+ * - use ip_conntrack_expect_free() instead of kfree() on the
+ * expect's (which are from the slab for quite some time)
+ * 2005-06-10 - Version 3.0
+ * - port helper to post-2.6.11 API changes,
+ * funded by Oxcoda NetBox Blue (http://www.netboxblue.com/)
+ * 2005-07-30 - Version 3.1
+ * - port helper to 2.6.13 API changes
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/netfilter.h>
+#include <linux/ip.h>
+#include <net/checksum.h>
+#include <net/tcp.h>
+
+#include <linux/netfilter_ipv4/ip_conntrack.h>
+#include <linux/netfilter_ipv4/ip_conntrack_core.h>
+#include <linux/netfilter_ipv4/ip_conntrack_helper.h>
+#include <linux/netfilter_ipv4/ip_conntrack_proto_gre.h>
+#include <linux/netfilter_ipv4/ip_conntrack_pptp.h>
+
+#define IP_CT_PPTP_VERSION "3.1"
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Harald Welte <laforge@gnumonks.org>");
+MODULE_DESCRIPTION("Netfilter connection tracking helper module for PPTP");
+
+static DEFINE_SPINLOCK(ip_pptp_lock);
+
+int
+(*ip_nat_pptp_hook_outbound)(struct sk_buff **pskb,
+ struct ip_conntrack *ct,
+ enum ip_conntrack_info ctinfo,
+ struct PptpControlHeader *ctlh,
+ union pptp_ctrl_union *pptpReq);
+
+int
+(*ip_nat_pptp_hook_inbound)(struct sk_buff **pskb,
+ struct ip_conntrack *ct,
+ enum ip_conntrack_info ctinfo,
+ struct PptpControlHeader *ctlh,
+ union pptp_ctrl_union *pptpReq);
+
+int
+(*ip_nat_pptp_hook_exp_gre)(struct ip_conntrack_expect *expect_orig,
+ struct ip_conntrack_expect *expect_reply);
+
+void
+(*ip_nat_pptp_hook_expectfn)(struct ip_conntrack *ct,
+ struct ip_conntrack_expect *exp);
+
+#if 0
+/* PptpControlMessageType names */
+const char *pptp_msg_name[] = {
+ "UNKNOWN_MESSAGE",
+ "START_SESSION_REQUEST",
+ "START_SESSION_REPLY",
+ "STOP_SESSION_REQUEST",
+ "STOP_SESSION_REPLY",
+ "ECHO_REQUEST",
+ "ECHO_REPLY",
+ "OUT_CALL_REQUEST",
+ "OUT_CALL_REPLY",
+ "IN_CALL_REQUEST",
+ "IN_CALL_REPLY",
+ "IN_CALL_CONNECT",
+ "CALL_CLEAR_REQUEST",
+ "CALL_DISCONNECT_NOTIFY",
+ "WAN_ERROR_NOTIFY",
+ "SET_LINK_INFO"
+};
+EXPORT_SYMBOL(pptp_msg_name);
+#define DEBUGP(format, args...) printk(KERN_DEBUG "%s:%s: " format, __FILE__, __FUNCTION__, ## args)
+#else
+#define DEBUGP(format, args...)
+#endif
+
+#define SECS *HZ
+#define MINS * 60 SECS
+#define HOURS * 60 MINS
+
+#define PPTP_GRE_TIMEOUT (10 MINS)
+#define PPTP_GRE_STREAM_TIMEOUT (5 HOURS)
+
+static void pptp_expectfn(struct ip_conntrack *ct,
+ struct ip_conntrack_expect *exp)
+{
+ DEBUGP("increasing timeouts\n");
+
+ /* increase timeout of GRE data channel conntrack entry */
+ ct->proto.gre.timeout = PPTP_GRE_TIMEOUT;
+ ct->proto.gre.stream_timeout = PPTP_GRE_STREAM_TIMEOUT;
+
+ /* Can you see how rusty this code is, compared with the pre-2.6.11
+ * one? That's what happened to my shiny newnat of 2002 ;( -HW */
+
+ if (!ip_nat_pptp_hook_expectfn) {
+ struct ip_conntrack_tuple inv_t;
+ struct ip_conntrack_expect *exp_other;
+
+ /* obviously this tuple inversion only works until you do NAT */
+ invert_tuplepr(&inv_t, &exp->tuple);
+ DEBUGP("trying to unexpect other dir: ");
+ DUMP_TUPLE(&inv_t);
+
+ exp_other = ip_conntrack_expect_find(&inv_t);
+ if (exp_other) {
+ /* delete other expectation. */
+ DEBUGP("found\n");
+ ip_conntrack_unexpect_related(exp_other);
+ ip_conntrack_expect_put(exp_other);
+ } else {
+ DEBUGP("not found\n");
+ }
+ } else {
+ /* we need more than simple inversion */
+ ip_nat_pptp_hook_expectfn(ct, exp);
+ }
+}
+
+static int destroy_sibling_or_exp(const struct ip_conntrack_tuple *t)
+{
+ struct ip_conntrack_tuple_hash *h;
+ struct ip_conntrack_expect *exp;
+
+ DEBUGP("trying to timeout ct or exp for tuple ");
+ DUMP_TUPLE(t);
+
+ h = ip_conntrack_find_get(t, NULL);
+ if (h) {
+ struct ip_conntrack *sibling = tuplehash_to_ctrack(h);
+ DEBUGP("setting timeout of conntrack %p to 0\n", sibling);
+ sibling->proto.gre.timeout = 0;
+ sibling->proto.gre.stream_timeout = 0;
+ /* refresh_acct will not modify counters if skb == NULL */
+ if (del_timer(&sibling->timeout))
+ sibling->timeout.function((unsigned long)sibling);
+ ip_conntrack_put(sibling);
+ return 1;
+ } else {
+ exp = ip_conntrack_expect_find(t);
+ if (exp) {
+ DEBUGP("unexpect_related of expect %p\n", exp);
+ ip_conntrack_unexpect_related(exp);
+ ip_conntrack_expect_put(exp);
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+
+/* timeout GRE data connections */
+static void pptp_destroy_siblings(struct ip_conntrack *ct)
+{
+ struct ip_conntrack_tuple t;
+
+ /* Since ct->sibling_list has literally rusted away in 2.6.11,
+ * we now need another way to find out about our sibling
+ * contrack and expects... -HW */
+
+ /* try original (pns->pac) tuple */
+ memcpy(&t, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple, sizeof(t));
+ t.dst.protonum = IPPROTO_GRE;
+ t.src.u.gre.key = htons(ct->help.ct_pptp_info.pns_call_id);
+ t.dst.u.gre.key = htons(ct->help.ct_pptp_info.pac_call_id);
+
+ if (!destroy_sibling_or_exp(&t))
+ DEBUGP("failed to timeout original pns->pac ct/exp\n");
+
+ /* try reply (pac->pns) tuple */
+ memcpy(&t, &ct->tuplehash[IP_CT_DIR_REPLY].tuple, sizeof(t));
+ t.dst.protonum = IPPROTO_GRE;
+ t.src.u.gre.key = htons(ct->help.ct_pptp_info.pac_call_id);
+ t.dst.u.gre.key = htons(ct->help.ct_pptp_info.pns_call_id);
+
+ if (!destroy_sibling_or_exp(&t))
+ DEBUGP("failed to timeout reply pac->pns ct/exp\n");
+}
+
+/* expect GRE connections (PNS->PAC and PAC->PNS direction) */
+static inline int
+exp_gre(struct ip_conntrack *master,
+ u_int32_t seq,
+ u_int16_t callid,
+ u_int16_t peer_callid)
+{
+ struct ip_conntrack_tuple inv_tuple;
+ struct ip_conntrack_tuple exp_tuples[] = {
+ /* tuple in original direction, PNS->PAC */
+ { .src = { .ip = master->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.ip,
+ .u = { .gre = { .key = peer_callid } }
+ },
+ .dst = { .ip = master->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.ip,
+ .u = { .gre = { .key = callid } },
+ .protonum = IPPROTO_GRE
+ },
+ },
+ /* tuple in reply direction, PAC->PNS */
+ { .src = { .ip = master->tuplehash[IP_CT_DIR_REPLY].tuple.src.ip,
+ .u = { .gre = { .key = callid } }
+ },
+ .dst = { .ip = master->tuplehash[IP_CT_DIR_REPLY].tuple.dst.ip,
+ .u = { .gre = { .key = peer_callid } },
+ .protonum = IPPROTO_GRE
+ },
+ }
+ };
+ struct ip_conntrack_expect *exp_orig, *exp_reply;
+ int ret = 1;
+
+ exp_orig = ip_conntrack_expect_alloc(master);
+ if (exp_orig == NULL)
+ goto out;
+
+ exp_reply = ip_conntrack_expect_alloc(master);
+ if (exp_reply == NULL)
+ goto out_put_orig;
+
+ memcpy(&exp_orig->tuple, &exp_tuples[0], sizeof(exp_orig->tuple));
+
+ exp_orig->mask.src.ip = 0xffffffff;
+ exp_orig->mask.src.u.all = 0;
+ exp_orig->mask.dst.u.all = 0;
+ exp_orig->mask.dst.u.gre.key = 0xffff;
+ exp_orig->mask.dst.ip = 0xffffffff;
+ exp_orig->mask.dst.protonum = 0xff;
+
+ exp_orig->master = master;
+ exp_orig->expectfn = pptp_expectfn;
+ exp_orig->flags = 0;
+
+ exp_orig->dir = IP_CT_DIR_ORIGINAL;
+
+ /* both expectations are identical apart from tuple */
+ memcpy(exp_reply, exp_orig, sizeof(*exp_reply));
+ memcpy(&exp_reply->tuple, &exp_tuples[1], sizeof(exp_reply->tuple));
+
+ exp_reply->dir = !exp_orig->dir;
+
+ if (ip_nat_pptp_hook_exp_gre)
+ ret = ip_nat_pptp_hook_exp_gre(exp_orig, exp_reply);
+ else {
+
+ DEBUGP("calling expect_related PNS->PAC");
+ DUMP_TUPLE(&exp_orig->tuple);
+
+ if (ip_conntrack_expect_related(exp_orig) != 0) {
+ DEBUGP("cannot expect_related()\n");
+ goto out_put_both;
+ }
+
+ DEBUGP("calling expect_related PAC->PNS");
+ DUMP_TUPLE(&exp_reply->tuple);
+
+ if (ip_conntrack_expect_related(exp_reply) != 0) {
+ DEBUGP("cannot expect_related()\n");
+ goto out_unexpect_orig;
+ }
+
+ /* Add GRE keymap entries */
+ if (ip_ct_gre_keymap_add(master, &exp_reply->tuple, 0) != 0) {
+ DEBUGP("cannot keymap_add() exp\n");
+ goto out_unexpect_both;
+ }
+
+ invert_tuplepr(&inv_tuple, &exp_reply->tuple);
+ if (ip_ct_gre_keymap_add(master, &inv_tuple, 1) != 0) {
+ ip_ct_gre_keymap_destroy(master);
+ DEBUGP("cannot keymap_add() exp_inv\n");
+ goto out_unexpect_both;
+ }
+ ret = 0;
+ }
+
+out_put_both:
+ ip_conntrack_expect_put(exp_reply);
+out_put_orig:
+ ip_conntrack_expect_put(exp_orig);
+out:
+ return ret;
+
+out_unexpect_both:
+ ip_conntrack_unexpect_related(exp_reply);
+out_unexpect_orig:
+ ip_conntrack_unexpect_related(exp_orig);
+ goto out_put_both;
+}
+
+static inline int
+pptp_inbound_pkt(struct sk_buff **pskb,
+ struct tcphdr *tcph,
+ unsigned int nexthdr_off,
+ unsigned int datalen,
+ struct ip_conntrack *ct,
+ enum ip_conntrack_info ctinfo)
+{
+ struct PptpControlHeader _ctlh, *ctlh;
+ unsigned int reqlen;
+ union pptp_ctrl_union _pptpReq, *pptpReq;
+ struct ip_ct_pptp_master *info = &ct->help.ct_pptp_info;
+ u_int16_t msg, *cid, *pcid;
+ u_int32_t seq;
+
+ ctlh = skb_header_pointer(*pskb, nexthdr_off, sizeof(_ctlh), &_ctlh);
+ if (!ctlh) {
+ DEBUGP("error during skb_header_pointer\n");
+ return NF_ACCEPT;
+ }
+ nexthdr_off += sizeof(_ctlh);
+ datalen -= sizeof(_ctlh);
+
+ reqlen = datalen;
+ if (reqlen > sizeof(*pptpReq))
+ reqlen = sizeof(*pptpReq);
+ pptpReq = skb_header_pointer(*pskb, nexthdr_off, reqlen, &_pptpReq);
+ if (!pptpReq) {
+ DEBUGP("error during skb_header_pointer\n");
+ return NF_ACCEPT;
+ }
+
+ msg = ntohs(ctlh->messageType);
+ DEBUGP("inbound control message %s\n", pptp_msg_name[msg]);
+
+ switch (msg) {
+ case PPTP_START_SESSION_REPLY:
+ if (reqlen < sizeof(_pptpReq.srep)) {
+ DEBUGP("%s: short packet\n", pptp_msg_name[msg]);
+ break;
+ }
+
+ /* server confirms new control session */
+ if (info->sstate < PPTP_SESSION_REQUESTED) {
+ DEBUGP("%s without START_SESS_REQUEST\n",
+ pptp_msg_name[msg]);
+ break;
+ }
+ if (pptpReq->srep.resultCode == PPTP_START_OK)
+ info->sstate = PPTP_SESSION_CONFIRMED;
+ else
+ info->sstate = PPTP_SESSION_ERROR;
+ break;
+
+ case PPTP_STOP_SESSION_REPLY:
+ if (reqlen < sizeof(_pptpReq.strep)) {
+ DEBUGP("%s: short packet\n", pptp_msg_name[msg]);
+ break;
+ }
+
+ /* server confirms end of control session */
+ if (info->sstate > PPTP_SESSION_STOPREQ) {
+ DEBUGP("%s without STOP_SESS_REQUEST\n",
+ pptp_msg_name[msg]);
+ break;
+ }
+ if (pptpReq->strep.resultCode == PPTP_STOP_OK)
+ info->sstate = PPTP_SESSION_NONE;
+ else
+ info->sstate = PPTP_SESSION_ERROR;
+ break;
+
+ case PPTP_OUT_CALL_REPLY:
+ if (reqlen < sizeof(_pptpReq.ocack)) {
+ DEBUGP("%s: short packet\n", pptp_msg_name[msg]);
+ break;
+ }
+
+ /* server accepted call, we now expect GRE frames */
+ if (info->sstate != PPTP_SESSION_CONFIRMED) {
+ DEBUGP("%s but no session\n", pptp_msg_name[msg]);
+ break;
+ }
+ if (info->cstate != PPTP_CALL_OUT_REQ &&
+ info->cstate != PPTP_CALL_OUT_CONF) {
+ DEBUGP("%s without OUTCALL_REQ\n", pptp_msg_name[msg]);
+ break;
+ }
+ if (pptpReq->ocack.resultCode != PPTP_OUTCALL_CONNECT) {
+ info->cstate = PPTP_CALL_NONE;
+ break;
+ }
+
+ cid = &pptpReq->ocack.callID;
+ pcid = &pptpReq->ocack.peersCallID;
+
+ info->pac_call_id = ntohs(*cid);
+
+ if (htons(info->pns_call_id) != *pcid) {
+ DEBUGP("%s for unknown callid %u\n",
+ pptp_msg_name[msg], ntohs(*pcid));
+ break;
+ }
+
+ DEBUGP("%s, CID=%X, PCID=%X\n", pptp_msg_name[msg],
+ ntohs(*cid), ntohs(*pcid));
+
+ info->cstate = PPTP_CALL_OUT_CONF;
+
+ seq = ntohl(tcph->seq) + sizeof(struct pptp_pkt_hdr)
+ + sizeof(struct PptpControlHeader)
+ + ((void *)pcid - (void *)pptpReq);
+
+ if (exp_gre(ct, seq, *cid, *pcid) != 0)
+ printk("ip_conntrack_pptp: error during exp_gre\n");
+ break;
+
+ case PPTP_IN_CALL_REQUEST:
+ if (reqlen < sizeof(_pptpReq.icack)) {
+ DEBUGP("%s: short packet\n", pptp_msg_name[msg]);
+ break;
+ }
+
+ /* server tells us about incoming call request */
+ if (info->sstate != PPTP_SESSION_CONFIRMED) {
+ DEBUGP("%s but no session\n", pptp_msg_name[msg]);
+ break;
+ }
+ pcid = &pptpReq->icack.peersCallID;
+ DEBUGP("%s, PCID=%X\n", pptp_msg_name[msg], ntohs(*pcid));
+ info->cstate = PPTP_CALL_IN_REQ;
+ info->pac_call_id = ntohs(*pcid);
+ break;
+
+ case PPTP_IN_CALL_CONNECT:
+ if (reqlen < sizeof(_pptpReq.iccon)) {
+ DEBUGP("%s: short packet\n", pptp_msg_name[msg]);
+ break;
+ }
+
+ /* server tells us about incoming call established */
+ if (info->sstate != PPTP_SESSION_CONFIRMED) {
+ DEBUGP("%s but no session\n", pptp_msg_name[msg]);
+ break;
+ }
+ if (info->sstate != PPTP_CALL_IN_REP
+ && info->sstate != PPTP_CALL_IN_CONF) {
+ DEBUGP("%s but never sent IN_CALL_REPLY\n",
+ pptp_msg_name[msg]);
+ break;
+ }
+
+ pcid = &pptpReq->iccon.peersCallID;
+ cid = &info->pac_call_id;
+
+ if (info->pns_call_id != ntohs(*pcid)) {
+ DEBUGP("%s for unknown CallID %u\n",
+ pptp_msg_name[msg], ntohs(*cid));
+ break;
+ }
+
+ DEBUGP("%s, PCID=%X\n", pptp_msg_name[msg], ntohs(*pcid));
+ info->cstate = PPTP_CALL_IN_CONF;
+
+ /* we expect a GRE connection from PAC to PNS */
+ seq = ntohl(tcph->seq) + sizeof(struct pptp_pkt_hdr)
+ + sizeof(struct PptpControlHeader)
+ + ((void *)pcid - (void *)pptpReq);
+
+ if (exp_gre(ct, seq, *cid, *pcid) != 0)
+ printk("ip_conntrack_pptp: error during exp_gre\n");
+
+ break;
+
+ case PPTP_CALL_DISCONNECT_NOTIFY:
+ if (reqlen < sizeof(_pptpReq.disc)) {
+ DEBUGP("%s: short packet\n", pptp_msg_name[msg]);
+ break;
+ }
+
+ /* server confirms disconnect */
+ cid = &pptpReq->disc.callID;
+ DEBUGP("%s, CID=%X\n", pptp_msg_name[msg], ntohs(*cid));
+ info->cstate = PPTP_CALL_NONE;
+
+ /* untrack this call id, unexpect GRE packets */
+ pptp_destroy_siblings(ct);
+ break;
+
+ case PPTP_WAN_ERROR_NOTIFY:
+ break;
+
+ case PPTP_ECHO_REQUEST:
+ case PPTP_ECHO_REPLY:
+ /* I don't have to explain these ;) */
+ break;
+ default:
+ DEBUGP("invalid %s (TY=%d)\n", (msg <= PPTP_MSG_MAX)
+ ? pptp_msg_name[msg]:pptp_msg_name[0], msg);
+ break;
+ }
+
+
+ if (ip_nat_pptp_hook_inbound)
+ return ip_nat_pptp_hook_inbound(pskb, ct, ctinfo, ctlh,
+ pptpReq);
+
+ return NF_ACCEPT;
+
+}
+
+static inline int
+pptp_outbound_pkt(struct sk_buff **pskb,
+ struct tcphdr *tcph,
+ unsigned int nexthdr_off,
+ unsigned int datalen,
+ struct ip_conntrack *ct,
+ enum ip_conntrack_info ctinfo)
+{
+ struct PptpControlHeader _ctlh, *ctlh;
+ unsigned int reqlen;
+ union pptp_ctrl_union _pptpReq, *pptpReq;
+ struct ip_ct_pptp_master *info = &ct->help.ct_pptp_info;
+ u_int16_t msg, *cid, *pcid;
+
+ ctlh = skb_header_pointer(*pskb, nexthdr_off, sizeof(_ctlh), &_ctlh);
+ if (!ctlh)
+ return NF_ACCEPT;
+ nexthdr_off += sizeof(_ctlh);
+ datalen -= sizeof(_ctlh);
+
+ reqlen = datalen;
+ if (reqlen > sizeof(*pptpReq))
+ reqlen = sizeof(*pptpReq);
+ pptpReq = skb_header_pointer(*pskb, nexthdr_off, reqlen, &_pptpReq);
+ if (!pptpReq)
+ return NF_ACCEPT;
+
+ msg = ntohs(ctlh->messageType);
+ DEBUGP("outbound control message %s\n", pptp_msg_name[msg]);
+
+ switch (msg) {
+ case PPTP_START_SESSION_REQUEST:
+ /* client requests for new control session */
+ if (info->sstate != PPTP_SESSION_NONE) {
+ DEBUGP("%s but we already have one",
+ pptp_msg_name[msg]);
+ }
+ info->sstate = PPTP_SESSION_REQUESTED;
+ break;
+ case PPTP_STOP_SESSION_REQUEST:
+ /* client requests end of control session */
+ info->sstate = PPTP_SESSION_STOPREQ;
+ break;
+
+ case PPTP_OUT_CALL_REQUEST:
+ if (reqlen < sizeof(_pptpReq.ocreq)) {
+ DEBUGP("%s: short packet\n", pptp_msg_name[msg]);
+ /* FIXME: break; */
+ }
+
+ /* client initiating connection to server */
+ if (info->sstate != PPTP_SESSION_CONFIRMED) {
+ DEBUGP("%s but no session\n",
+ pptp_msg_name[msg]);
+ break;
+ }
+ info->cstate = PPTP_CALL_OUT_REQ;
+ /* track PNS call id */
+ cid = &pptpReq->ocreq.callID;
+ DEBUGP("%s, CID=%X\n", pptp_msg_name[msg], ntohs(*cid));
+ info->pns_call_id = ntohs(*cid);
+ break;
+ case PPTP_IN_CALL_REPLY:
+ if (reqlen < sizeof(_pptpReq.icack)) {
+ DEBUGP("%s: short packet\n", pptp_msg_name[msg]);
+ break;
+ }
+
+ /* client answers incoming call */
+ if (info->cstate != PPTP_CALL_IN_REQ
+ && info->cstate != PPTP_CALL_IN_REP) {
+ DEBUGP("%s without incall_req\n",
+ pptp_msg_name[msg]);
+ break;
+ }
+ if (pptpReq->icack.resultCode != PPTP_INCALL_ACCEPT) {
+ info->cstate = PPTP_CALL_NONE;
+ break;
+ }
+ pcid = &pptpReq->icack.peersCallID;
+ if (info->pac_call_id != ntohs(*pcid)) {
+ DEBUGP("%s for unknown call %u\n",
+ pptp_msg_name[msg], ntohs(*pcid));
+ break;
+ }
+ DEBUGP("%s, CID=%X\n", pptp_msg_name[msg], ntohs(*pcid));
+ /* part two of the three-way handshake */
+ info->cstate = PPTP_CALL_IN_REP;
+ info->pns_call_id = ntohs(pptpReq->icack.callID);
+ break;
+
+ case PPTP_CALL_CLEAR_REQUEST:
+ /* client requests hangup of call */
+ if (info->sstate != PPTP_SESSION_CONFIRMED) {
+ DEBUGP("CLEAR_CALL but no session\n");
+ break;
+ }
+ /* FUTURE: iterate over all calls and check if
+ * call ID is valid. We don't do this without newnat,
+ * because we only know about last call */
+ info->cstate = PPTP_CALL_CLEAR_REQ;
+ break;
+ case PPTP_SET_LINK_INFO:
+ break;
+ case PPTP_ECHO_REQUEST:
+ case PPTP_ECHO_REPLY:
+ /* I don't have to explain these ;) */
+ break;
+ default:
+ DEBUGP("invalid %s (TY=%d)\n", (msg <= PPTP_MSG_MAX)?
+ pptp_msg_name[msg]:pptp_msg_name[0], msg);
+ /* unknown: no need to create GRE masq table entry */
+ break;
+ }
+
+ if (ip_nat_pptp_hook_outbound)
+ return ip_nat_pptp_hook_outbound(pskb, ct, ctinfo, ctlh,
+ pptpReq);
+
+ return NF_ACCEPT;
+}
+
+
+/* track caller id inside control connection, call expect_related */
+static int
+conntrack_pptp_help(struct sk_buff **pskb,
+ struct ip_conntrack *ct, enum ip_conntrack_info ctinfo)
+
+{
+ struct pptp_pkt_hdr _pptph, *pptph;
+ struct tcphdr _tcph, *tcph;
+ u_int32_t tcplen = (*pskb)->len - (*pskb)->nh.iph->ihl * 4;
+ u_int32_t datalen;
+ int dir = CTINFO2DIR(ctinfo);
+ struct ip_ct_pptp_master *info = &ct->help.ct_pptp_info;
+ unsigned int nexthdr_off;
+
+ int oldsstate, oldcstate;
+ int ret;
+
+ /* don't do any tracking before tcp handshake complete */
+ if (ctinfo != IP_CT_ESTABLISHED
+ && ctinfo != IP_CT_ESTABLISHED+IP_CT_IS_REPLY) {
+ DEBUGP("ctinfo = %u, skipping\n", ctinfo);
+ return NF_ACCEPT;
+ }
+
+ nexthdr_off = (*pskb)->nh.iph->ihl*4;
+ tcph = skb_header_pointer(*pskb, nexthdr_off, sizeof(_tcph), &_tcph);
+ BUG_ON(!tcph);
+ nexthdr_off += tcph->doff * 4;
+ datalen = tcplen - tcph->doff * 4;
+
+ if (tcph->fin || tcph->rst) {
+ DEBUGP("RST/FIN received, timeouting GRE\n");
+ /* can't do this after real newnat */
+ info->cstate = PPTP_CALL_NONE;
+
+ /* untrack this call id, unexpect GRE packets */
+ pptp_destroy_siblings(ct);
+ }
+
+ pptph = skb_header_pointer(*pskb, nexthdr_off, sizeof(_pptph), &_pptph);
+ if (!pptph) {
+ DEBUGP("no full PPTP header, can't track\n");
+ return NF_ACCEPT;
+ }
+ nexthdr_off += sizeof(_pptph);
+ datalen -= sizeof(_pptph);
+
+ /* if it's not a control message we can't do anything with it */
+ if (ntohs(pptph->packetType) != PPTP_PACKET_CONTROL ||
+ ntohl(pptph->magicCookie) != PPTP_MAGIC_COOKIE) {
+ DEBUGP("not a control packet\n");
+ return NF_ACCEPT;
+ }
+
+ oldsstate = info->sstate;
+ oldcstate = info->cstate;
+
+ spin_lock_bh(&ip_pptp_lock);
+
+ /* FIXME: We just blindly assume that the control connection is always
+ * established from PNS->PAC. However, RFC makes no guarantee */
+ if (dir == IP_CT_DIR_ORIGINAL)
+ /* client -> server (PNS -> PAC) */
+ ret = pptp_outbound_pkt(pskb, tcph, nexthdr_off, datalen, ct,
+ ctinfo);
+ else
+ /* server -> client (PAC -> PNS) */
+ ret = pptp_inbound_pkt(pskb, tcph, nexthdr_off, datalen, ct,
+ ctinfo);
+ DEBUGP("sstate: %d->%d, cstate: %d->%d\n",
+ oldsstate, info->sstate, oldcstate, info->cstate);
+ spin_unlock_bh(&ip_pptp_lock);
+
+ return ret;
+}
+
+/* control protocol helper */
+static struct ip_conntrack_helper pptp = {
+ .list = { NULL, NULL },
+ .name = "pptp",
+ .me = THIS_MODULE,
+ .max_expected = 2,
+ .timeout = 5 * 60,
+ .tuple = { .src = { .ip = 0,
+ .u = { .tcp = { .port =
+ __constant_htons(PPTP_CONTROL_PORT) } }
+ },
+ .dst = { .ip = 0,
+ .u = { .all = 0 },
+ .protonum = IPPROTO_TCP
+ }
+ },
+ .mask = { .src = { .ip = 0,
+ .u = { .tcp = { .port = 0xffff } }
+ },
+ .dst = { .ip = 0,
+ .u = { .all = 0 },
+ .protonum = 0xff
+ }
+ },
+ .help = conntrack_pptp_help
+};
+
+extern void __exit ip_ct_proto_gre_fini(void);
+extern int __init ip_ct_proto_gre_init(void);
+
+/* ip_conntrack_pptp initialization */
+static int __init init(void)
+{
+ int retcode;
+
+ retcode = ip_ct_proto_gre_init();
+ if (retcode < 0)
+ return retcode;
+
+ DEBUGP(" registering helper\n");
+ if ((retcode = ip_conntrack_helper_register(&pptp))) {
+ printk(KERN_ERR "Unable to register conntrack application "
+ "helper for pptp: %d\n", retcode);
+ ip_ct_proto_gre_fini();
+ return retcode;
+ }
+
+ printk("ip_conntrack_pptp version %s loaded\n", IP_CT_PPTP_VERSION);
+ return 0;
+}
+
+static void __exit fini(void)
+{
+ ip_conntrack_helper_unregister(&pptp);
+ ip_ct_proto_gre_fini();
+ printk("ip_conntrack_pptp version %s unloaded\n", IP_CT_PPTP_VERSION);
+}
+
+module_init(init);
+module_exit(fini);
+
+EXPORT_SYMBOL(ip_nat_pptp_hook_outbound);
+EXPORT_SYMBOL(ip_nat_pptp_hook_inbound);
+EXPORT_SYMBOL(ip_nat_pptp_hook_exp_gre);
+EXPORT_SYMBOL(ip_nat_pptp_hook_expectfn);
diff --git a/net/ipv4/netfilter/ip_conntrack_netlink.c b/net/ipv4/netfilter/ip_conntrack_netlink.c
index 15aef35..b08a432 100644
--- a/net/ipv4/netfilter/ip_conntrack_netlink.c
+++ b/net/ipv4/netfilter/ip_conntrack_netlink.c
@@ -1270,7 +1270,7 @@ ctnetlink_get_expect(struct sock *ctnl, struct sk_buff *skb,
if (err < 0)
return err;
- exp = ip_conntrack_expect_find_get(&tuple);
+ exp = ip_conntrack_expect_find(&tuple);
if (!exp)
return -ENOENT;
@@ -1318,7 +1318,7 @@ ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb,
return err;
/* bump usage count to 2 */
- exp = ip_conntrack_expect_find_get(&tuple);
+ exp = ip_conntrack_expect_find(&tuple);
if (!exp)
return -ENOENT;
diff --git a/net/ipv4/netfilter/ip_conntrack_proto_gre.c b/net/ipv4/netfilter/ip_conntrack_proto_gre.c
new file mode 100644
index 0000000..de3cb9d
--- /dev/null
+++ b/net/ipv4/netfilter/ip_conntrack_proto_gre.c
@@ -0,0 +1,327 @@
+/*
+ * ip_conntrack_proto_gre.c - Version 3.0
+ *
+ * Connection tracking protocol helper module for GRE.
+ *
+ * GRE is a generic encapsulation protocol, which is generally not very
+ * suited for NAT, as it has no protocol-specific part as port numbers.
+ *
+ * It has an optional key field, which may help us distinguishing two
+ * connections between the same two hosts.
+ *
+ * GRE is defined in RFC 1701 and RFC 1702, as well as RFC 2784
+ *
+ * PPTP is built on top of a modified version of GRE, and has a mandatory
+ * field called "CallID", which serves us for the same purpose as the key
+ * field in plain GRE.
+ *
+ * Documentation about PPTP can be found in RFC 2637
+ *
+ * (C) 2000-2005 by Harald Welte <laforge@gnumonks.org>
+ *
+ * Development of this code funded by Astaro AG (http://www.astaro.com/)
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/timer.h>
+#include <linux/netfilter.h>
+#include <linux/ip.h>
+#include <linux/in.h>
+#include <linux/list.h>
+
+static DEFINE_RWLOCK(ip_ct_gre_lock);
+#define ASSERT_READ_LOCK(x)
+#define ASSERT_WRITE_LOCK(x)
+
+#include <linux/netfilter_ipv4/listhelp.h>
+#include <linux/netfilter_ipv4/ip_conntrack_protocol.h>
+#include <linux/netfilter_ipv4/ip_conntrack_helper.h>
+#include <linux/netfilter_ipv4/ip_conntrack_core.h>
+
+#include <linux/netfilter_ipv4/ip_conntrack_proto_gre.h>
+#include <linux/netfilter_ipv4/ip_conntrack_pptp.h>
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Harald Welte <laforge@gnumonks.org>");
+MODULE_DESCRIPTION("netfilter connection tracking protocol helper for GRE");
+
+/* shamelessly stolen from ip_conntrack_proto_udp.c */
+#define GRE_TIMEOUT (30*HZ)
+#define GRE_STREAM_TIMEOUT (180*HZ)
+
+#if 0
+#define DEBUGP(format, args...) printk(KERN_DEBUG "%s:%s: " format, __FILE__, __FUNCTION__, ## args)
+#define DUMP_TUPLE_GRE(x) printk("%u.%u.%u.%u:0x%x -> %u.%u.%u.%u:0x%x\n", \
+ NIPQUAD((x)->src.ip), ntohs((x)->src.u.gre.key), \
+ NIPQUAD((x)->dst.ip), ntohs((x)->dst.u.gre.key))
+#else
+#define DEBUGP(x, args...)
+#define DUMP_TUPLE_GRE(x)
+#endif
+
+/* GRE KEYMAP HANDLING FUNCTIONS */
+static LIST_HEAD(gre_keymap_list);
+
+static inline int gre_key_cmpfn(const struct ip_ct_gre_keymap *km,
+ const struct ip_conntrack_tuple *t)
+{
+ return ((km->tuple.src.ip == t->src.ip) &&
+ (km->tuple.dst.ip == t->dst.ip) &&
+ (km->tuple.dst.protonum == t->dst.protonum) &&
+ (km->tuple.dst.u.all == t->dst.u.all));
+}
+
+/* look up the source key for a given tuple */
+static u_int32_t gre_keymap_lookup(struct ip_conntrack_tuple *t)
+{
+ struct ip_ct_gre_keymap *km;
+ u_int32_t key = 0;
+
+ read_lock_bh(&ip_ct_gre_lock);
+ km = LIST_FIND(&gre_keymap_list, gre_key_cmpfn,
+ struct ip_ct_gre_keymap *, t);
+ if (km)
+ key = km->tuple.src.u.gre.key;
+ read_unlock_bh(&ip_ct_gre_lock);
+
+ DEBUGP("lookup src key 0x%x up key for ", key);
+ DUMP_TUPLE_GRE(t);
+
+ return key;
+}
+
+/* add a single keymap entry, associate with specified master ct */
+int
+ip_ct_gre_keymap_add(struct ip_conntrack *ct,
+ struct ip_conntrack_tuple *t, int reply)
+{
+ struct ip_ct_gre_keymap **exist_km, *km, *old;
+
+ if (!ct->helper || strcmp(ct->helper->name, "pptp")) {
+ DEBUGP("refusing to add GRE keymap to non-pptp session\n");
+ return -1;
+ }
+
+ if (!reply)
+ exist_km = &ct->help.ct_pptp_info.keymap_orig;
+ else
+ exist_km = &ct->help.ct_pptp_info.keymap_reply;
+
+ if (*exist_km) {
+ /* check whether it's a retransmission */
+ old = LIST_FIND(&gre_keymap_list, gre_key_cmpfn,
+ struct ip_ct_gre_keymap *, t);
+ if (old == *exist_km) {
+ DEBUGP("retransmission\n");
+ return 0;
+ }
+
+ DEBUGP("trying to override keymap_%s for ct %p\n",
+ reply? "reply":"orig", ct);
+ return -EEXIST;
+ }
+
+ km = kmalloc(sizeof(*km), GFP_ATOMIC);
+ if (!km)
+ return -ENOMEM;
+
+ memcpy(&km->tuple, t, sizeof(*t));
+ *exist_km = km;
+
+ DEBUGP("adding new entry %p: ", km);
+ DUMP_TUPLE_GRE(&km->tuple);
+
+ write_lock_bh(&ip_ct_gre_lock);
+ list_append(&gre_keymap_list, km);
+ write_unlock_bh(&ip_ct_gre_lock);
+
+ return 0;
+}
+
+/* destroy the keymap entries associated with specified master ct */
+void ip_ct_gre_keymap_destroy(struct ip_conntrack *ct)
+{
+ DEBUGP("entering for ct %p\n", ct);
+
+ if (!ct->helper || strcmp(ct->helper->name, "pptp")) {
+ DEBUGP("refusing to destroy GRE keymap to non-pptp session\n");
+ return;
+ }
+
+ write_lock_bh(&ip_ct_gre_lock);
+ if (ct->help.ct_pptp_info.keymap_orig) {
+ DEBUGP("removing %p from list\n",
+ ct->help.ct_pptp_info.keymap_orig);
+ list_del(&ct->help.ct_pptp_info.keymap_orig->list);
+ kfree(ct->help.ct_pptp_info.keymap_orig);
+ ct->help.ct_pptp_info.keymap_orig = NULL;
+ }
+ if (ct->help.ct_pptp_info.keymap_reply) {
+ DEBUGP("removing %p from list\n",
+ ct->help.ct_pptp_info.keymap_reply);
+ list_del(&ct->help.ct_pptp_info.keymap_reply->list);
+ kfree(ct->help.ct_pptp_info.keymap_reply);
+ ct->help.ct_pptp_info.keymap_reply = NULL;
+ }
+ write_unlock_bh(&ip_ct_gre_lock);
+}
+
+
+/* PUBLIC CONNTRACK PROTO HELPER FUNCTIONS */
+
+/* invert gre part of tuple */
+static int gre_invert_tuple(struct ip_conntrack_tuple *tuple,
+ const struct ip_conntrack_tuple *orig)
+{
+ tuple->dst.u.gre.key = orig->src.u.gre.key;
+ tuple->src.u.gre.key = orig->dst.u.gre.key;
+
+ return 1;
+}
+
+/* gre hdr info to tuple */
+static int gre_pkt_to_tuple(const struct sk_buff *skb,
+ unsigned int dataoff,
+ struct ip_conntrack_tuple *tuple)
+{
+ struct gre_hdr_pptp _pgrehdr, *pgrehdr;
+ u_int32_t srckey;
+ struct gre_hdr _grehdr, *grehdr;
+
+ /* first only delinearize old RFC1701 GRE header */
+ grehdr = skb_header_pointer(skb, dataoff, sizeof(_grehdr), &_grehdr);
+ if (!grehdr || grehdr->version != GRE_VERSION_PPTP) {
+ /* try to behave like "ip_conntrack_proto_generic" */
+ tuple->src.u.all = 0;
+ tuple->dst.u.all = 0;
+ return 1;
+ }
+
+ /* PPTP header is variable length, only need up to the call_id field */
+ pgrehdr = skb_header_pointer(skb, dataoff, 8, &_pgrehdr);
+ if (!pgrehdr)
+ return 1;
+
+ if (ntohs(grehdr->protocol) != GRE_PROTOCOL_PPTP) {
+ DEBUGP("GRE_VERSION_PPTP but unknown proto\n");
+ return 0;
+ }
+
+ tuple->dst.u.gre.key = pgrehdr->call_id;
+ srckey = gre_keymap_lookup(tuple);
+ tuple->src.u.gre.key = srckey;
+
+ return 1;
+}
+
+/* print gre part of tuple */
+static int gre_print_tuple(struct seq_file *s,
+ const struct ip_conntrack_tuple *tuple)
+{
+ return seq_printf(s, "srckey=0x%x dstkey=0x%x ",
+ ntohs(tuple->src.u.gre.key),
+ ntohs(tuple->dst.u.gre.key));
+}
+
+/* print private data for conntrack */
+static int gre_print_conntrack(struct seq_file *s,
+ const struct ip_conntrack *ct)
+{
+ return seq_printf(s, "timeout=%u, stream_timeout=%u ",
+ (ct->proto.gre.timeout / HZ),
+ (ct->proto.gre.stream_timeout / HZ));
+}
+
+/* Returns verdict for packet, and may modify conntrack */
+static int gre_packet(struct ip_conntrack *ct,
+ const struct sk_buff *skb,
+ enum ip_conntrack_info conntrackinfo)
+{
+ /* If we've seen traffic both ways, this is a GRE connection.
+ * Extend timeout. */
+ if (ct->status & IPS_SEEN_REPLY) {
+ ip_ct_refresh_acct(ct, conntrackinfo, skb,
+ ct->proto.gre.stream_timeout);
+ /* Also, more likely to be important, and not a probe. */
+ set_bit(IPS_ASSURED_BIT, &ct->status);
+ } else
+ ip_ct_refresh_acct(ct, conntrackinfo, skb,
+ ct->proto.gre.timeout);
+
+ return NF_ACCEPT;
+}
+
+/* Called when a new connection for this protocol found. */
+static int gre_new(struct ip_conntrack *ct,
+ const struct sk_buff *skb)
+{
+ DEBUGP(": ");
+ DUMP_TUPLE_GRE(&ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple);
+
+ /* initialize to sane value. Ideally a conntrack helper
+ * (e.g. in case of pptp) is increasing them */
+ ct->proto.gre.stream_timeout = GRE_STREAM_TIMEOUT;
+ ct->proto.gre.timeout = GRE_TIMEOUT;
+
+ return 1;
+}
+
+/* Called when a conntrack entry has already been removed from the hashes
+ * and is about to be deleted from memory */
+static void gre_destroy(struct ip_conntrack *ct)
+{
+ struct ip_conntrack *master = ct->master;
+ DEBUGP(" entering\n");
+
+ if (!master)
+ DEBUGP("no master !?!\n");
+ else
+ ip_ct_gre_keymap_destroy(master);
+}
+
+/* protocol helper struct */
+static struct ip_conntrack_protocol gre = {
+ .proto = IPPROTO_GRE,
+ .name = "gre",
+ .pkt_to_tuple = gre_pkt_to_tuple,
+ .invert_tuple = gre_invert_tuple,
+ .print_tuple = gre_print_tuple,
+ .print_conntrack = gre_print_conntrack,
+ .packet = gre_packet,
+ .new = gre_new,
+ .destroy = gre_destroy,
+ .me = THIS_MODULE,
+#if defined(CONFIG_IP_NF_CONNTRACK_NETLINK) || \
+ defined(CONFIG_IP_NF_CONNTRACK_NETLINK_MODULE)
+ .tuple_to_nfattr = ip_ct_port_tuple_to_nfattr,
+ .nfattr_to_tuple = ip_ct_port_nfattr_to_tuple,
+#endif
+};
+
+/* ip_conntrack_proto_gre initialization */
+int __init ip_ct_proto_gre_init(void)
+{
+ return ip_conntrack_protocol_register(&gre);
+}
+
+void __exit ip_ct_proto_gre_fini(void)
+{
+ struct list_head *pos, *n;
+
+ /* delete all keymap entries */
+ write_lock_bh(&ip_ct_gre_lock);
+ list_for_each_safe(pos, n, &gre_keymap_list) {
+ DEBUGP("deleting keymap %p at module unload time\n", pos);
+ list_del(pos);
+ kfree(pos);
+ }
+ write_unlock_bh(&ip_ct_gre_lock);
+
+ ip_conntrack_protocol_unregister(&gre);
+}
+
+EXPORT_SYMBOL(ip_ct_gre_keymap_add);
+EXPORT_SYMBOL(ip_ct_gre_keymap_destroy);
diff --git a/net/ipv4/netfilter/ip_conntrack_standalone.c b/net/ipv4/netfilter/ip_conntrack_standalone.c
index ae3e3e6..d3c7808 100644
--- a/net/ipv4/netfilter/ip_conntrack_standalone.c
+++ b/net/ipv4/netfilter/ip_conntrack_standalone.c
@@ -993,11 +993,11 @@ EXPORT_SYMBOL(ip_ct_refresh_acct);
EXPORT_SYMBOL(ip_conntrack_expect_alloc);
EXPORT_SYMBOL(ip_conntrack_expect_put);
-EXPORT_SYMBOL_GPL(ip_conntrack_expect_find_get);
+EXPORT_SYMBOL_GPL(__ip_conntrack_expect_find);
+EXPORT_SYMBOL_GPL(ip_conntrack_expect_find);
EXPORT_SYMBOL(ip_conntrack_expect_related);
EXPORT_SYMBOL(ip_conntrack_unexpect_related);
EXPORT_SYMBOL_GPL(ip_conntrack_expect_list);
-EXPORT_SYMBOL_GPL(__ip_conntrack_expect_find);
EXPORT_SYMBOL_GPL(ip_ct_unlink_expect);
EXPORT_SYMBOL(ip_conntrack_tuple_taken);
diff --git a/net/ipv4/netfilter/ip_nat_core.c b/net/ipv4/netfilter/ip_nat_core.c
index 1adedb7..c3ea891 100644
--- a/net/ipv4/netfilter/ip_nat_core.c
+++ b/net/ipv4/netfilter/ip_nat_core.c
@@ -578,6 +578,8 @@ ip_nat_port_nfattr_to_range(struct nfattr *tb[], struct ip_nat_range *range)
return ret;
}
+EXPORT_SYMBOL_GPL(ip_nat_port_nfattr_to_range);
+EXPORT_SYMBOL_GPL(ip_nat_port_range_to_nfattr);
#endif
int __init ip_nat_init(void)
diff --git a/net/ipv4/netfilter/ip_nat_helper_pptp.c b/net/ipv4/netfilter/ip_nat_helper_pptp.c
new file mode 100644
index 0000000..3cdd068
--- /dev/null
+++ b/net/ipv4/netfilter/ip_nat_helper_pptp.c
@@ -0,0 +1,401 @@
+/*
+ * ip_nat_pptp.c - Version 3.0
+ *
+ * NAT support for PPTP (Point to Point Tunneling Protocol).
+ * PPTP is a a protocol for creating virtual private networks.
+ * It is a specification defined by Microsoft and some vendors
+ * working with Microsoft. PPTP is built on top of a modified
+ * version of the Internet Generic Routing Encapsulation Protocol.
+ * GRE is defined in RFC 1701 and RFC 1702. Documentation of
+ * PPTP can be found in RFC 2637
+ *
+ * (C) 2000-2005 by Harald Welte <laforge@gnumonks.org>
+ *
+ * Development of this code funded by Astaro AG (http://www.astaro.com/)
+ *
+ * TODO: - NAT to a unique tuple, not to TCP source port
+ * (needs netfilter tuple reservation)
+ *
+ * Changes:
+ * 2002-02-10 - Version 1.3
+ * - Use ip_nat_mangle_tcp_packet() because of cloned skb's
+ * in local connections (Philip Craig <philipc@snapgear.com>)
+ * - add checks for magicCookie and pptp version
+ * - make argument list of pptp_{out,in}bound_packet() shorter
+ * - move to C99 style initializers
+ * - print version number at module loadtime
+ * 2003-09-22 - Version 1.5
+ * - use SNATed tcp sourceport as callid, since we get called before
+ * TCP header is mangled (Philip Craig <philipc@snapgear.com>)
+ * 2004-10-22 - Version 2.0
+ * - kernel 2.6.x version
+ * 2005-06-10 - Version 3.0
+ * - kernel >= 2.6.11 version,
+ * funded by Oxcoda NetBox Blue (http://www.netboxblue.com/)
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/ip.h>
+#include <linux/tcp.h>
+#include <net/tcp.h>
+
+#include <linux/netfilter_ipv4/ip_nat.h>
+#include <linux/netfilter_ipv4/ip_nat_rule.h>
+#include <linux/netfilter_ipv4/ip_nat_helper.h>
+#include <linux/netfilter_ipv4/ip_nat_pptp.h>
+#include <linux/netfilter_ipv4/ip_conntrack_core.h>
+#include <linux/netfilter_ipv4/ip_conntrack_helper.h>
+#include <linux/netfilter_ipv4/ip_conntrack_proto_gre.h>
+#include <linux/netfilter_ipv4/ip_conntrack_pptp.h>
+
+#define IP_NAT_PPTP_VERSION "3.0"
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Harald Welte <laforge@gnumonks.org>");
+MODULE_DESCRIPTION("Netfilter NAT helper module for PPTP");
+
+
+#if 0
+extern const char *pptp_msg_name[];
+#define DEBUGP(format, args...) printk(KERN_DEBUG "%s:%s: " format, __FILE__, \
+ __FUNCTION__, ## args)
+#else
+#define DEBUGP(format, args...)
+#endif
+
+static void pptp_nat_expected(struct ip_conntrack *ct,
+ struct ip_conntrack_expect *exp)
+{
+ struct ip_conntrack *master = ct->master;
+ struct ip_conntrack_expect *other_exp;
+ struct ip_conntrack_tuple t;
+ struct ip_ct_pptp_master *ct_pptp_info;
+ struct ip_nat_pptp *nat_pptp_info;
+
+ ct_pptp_info = &master->help.ct_pptp_info;
+ nat_pptp_info = &master->nat.help.nat_pptp_info;
+
+ /* And here goes the grand finale of corrosion... */
+
+ if (exp->dir == IP_CT_DIR_ORIGINAL) {
+ DEBUGP("we are PNS->PAC\n");
+ /* therefore, build tuple for PAC->PNS */
+ t.src.ip = master->tuplehash[IP_CT_DIR_REPLY].tuple.src.ip;
+ t.src.u.gre.key = htons(master->help.ct_pptp_info.pac_call_id);
+ t.dst.ip = master->tuplehash[IP_CT_DIR_REPLY].tuple.dst.ip;
+ t.dst.u.gre.key = htons(master->help.ct_pptp_info.pns_call_id);
+ t.dst.protonum = IPPROTO_GRE;
+ } else {
+ DEBUGP("we are PAC->PNS\n");
+ /* build tuple for PNS->PAC */
+ t.src.ip = master->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.ip;
+ t.src.u.gre.key =
+ htons(master->nat.help.nat_pptp_info.pns_call_id);
+ t.dst.ip = master->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.ip;
+ t.dst.u.gre.key =
+ htons(master->nat.help.nat_pptp_info.pac_call_id);
+ t.dst.protonum = IPPROTO_GRE;
+ }
+
+ DEBUGP("trying to unexpect other dir: ");
+ DUMP_TUPLE(&t);
+ other_exp = ip_conntrack_expect_find(&t);
+ if (other_exp) {
+ ip_conntrack_unexpect_related(other_exp);
+ ip_conntrack_expect_put(other_exp);
+ DEBUGP("success\n");
+ } else {
+ DEBUGP("not found!\n");
+ }
+
+ ip_nat_follow_master(ct, exp);
+}
+
+/* outbound packets == from PNS to PAC */
+static int
+pptp_outbound_pkt(struct sk_buff **pskb,
+ struct ip_conntrack *ct,
+ enum ip_conntrack_info ctinfo,
+ struct PptpControlHeader *ctlh,
+ union pptp_ctrl_union *pptpReq)
+
+{
+ struct ip_ct_pptp_master *ct_pptp_info = &ct->help.ct_pptp_info;
+ struct ip_nat_pptp *nat_pptp_info = &ct->nat.help.nat_pptp_info;
+
+ u_int16_t msg, *cid = NULL, new_callid;
+
+ new_callid = htons(ct_pptp_info->pns_call_id);
+
+ switch (msg = ntohs(ctlh->messageType)) {
+ case PPTP_OUT_CALL_REQUEST:
+ cid = &pptpReq->ocreq.callID;
+ /* FIXME: ideally we would want to reserve a call ID
+ * here. current netfilter NAT core is not able to do
+ * this :( For now we use TCP source port. This breaks
+ * multiple calls within one control session */
+
+ /* save original call ID in nat_info */
+ nat_pptp_info->pns_call_id = ct_pptp_info->pns_call_id;
+
+ /* don't use tcph->source since we are at a DSTmanip
+ * hook (e.g. PREROUTING) and pkt is not mangled yet */
+ new_callid = ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.u.tcp.port;
+
+ /* save new call ID in ct info */
+ ct_pptp_info->pns_call_id = ntohs(new_callid);
+ break;
+ case PPTP_IN_CALL_REPLY:
+ cid = &pptpReq->icreq.callID;
+ break;
+ case PPTP_CALL_CLEAR_REQUEST:
+ cid = &pptpReq->clrreq.callID;
+ break;
+ default:
+ DEBUGP("unknown outbound packet 0x%04x:%s\n", msg,
+ (msg <= PPTP_MSG_MAX)?
+ pptp_msg_name[msg]:pptp_msg_name[0]);
+ /* fall through */
+
+ case PPTP_SET_LINK_INFO:
+ /* only need to NAT in case PAC is behind NAT box */
+ case PPTP_START_SESSION_REQUEST:
+ case PPTP_START_SESSION_REPLY:
+ case PPTP_STOP_SESSION_REQUEST:
+ case PPTP_STOP_SESSION_REPLY:
+ case PPTP_ECHO_REQUEST:
+ case PPTP_ECHO_REPLY:
+ /* no need to alter packet */
+ return NF_ACCEPT;
+ }
+
+ /* only OUT_CALL_REQUEST, IN_CALL_REPLY, CALL_CLEAR_REQUEST pass
+ * down to here */
+
+ IP_NF_ASSERT(cid);
+
+ DEBUGP("altering call id from 0x%04x to 0x%04x\n",
+ ntohs(*cid), ntohs(new_callid));
+
+ /* mangle packet */
+ if (ip_nat_mangle_tcp_packet(pskb, ct, ctinfo,
+ (void *)cid - ((void *)ctlh - sizeof(struct pptp_pkt_hdr)),
+ sizeof(new_callid),
+ (char *)&new_callid,
+ sizeof(new_callid)) == 0)
+ return NF_DROP;
+
+ return NF_ACCEPT;
+}
+
+static int
+pptp_exp_gre(struct ip_conntrack_expect *expect_orig,
+ struct ip_conntrack_expect *expect_reply)
+{
+ struct ip_ct_pptp_master *ct_pptp_info =
+ &expect_orig->master->help.ct_pptp_info;
+ struct ip_nat_pptp *nat_pptp_info =
+ &expect_orig->master->nat.help.nat_pptp_info;
+
+ struct ip_conntrack *ct = expect_orig->master;
+
+ struct ip_conntrack_tuple inv_t;
+ struct ip_conntrack_tuple *orig_t, *reply_t;
+
+ /* save original PAC call ID in nat_info */
+ nat_pptp_info->pac_call_id = ct_pptp_info->pac_call_id;
+
+ /* alter expectation */
+ orig_t = &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple;
+ reply_t = &ct->tuplehash[IP_CT_DIR_REPLY].tuple;
+
+ /* alter expectation for PNS->PAC direction */
+ invert_tuplepr(&inv_t, &expect_orig->tuple);
+ expect_orig->saved_proto.gre.key = htons(nat_pptp_info->pac_call_id);
+ expect_orig->tuple.src.u.gre.key = htons(nat_pptp_info->pns_call_id);
+ expect_orig->tuple.dst.u.gre.key = htons(ct_pptp_info->pac_call_id);
+ inv_t.src.ip = reply_t->src.ip;
+ inv_t.dst.ip = reply_t->dst.ip;
+ inv_t.src.u.gre.key = htons(nat_pptp_info->pac_call_id);
+ inv_t.dst.u.gre.key = htons(ct_pptp_info->pns_call_id);
+
+ if (!ip_conntrack_expect_related(expect_orig)) {
+ DEBUGP("successfully registered expect\n");
+ } else {
+ DEBUGP("can't expect_related(expect_orig)\n");
+ return 1;
+ }
+
+ /* alter expectation for PAC->PNS direction */
+ invert_tuplepr(&inv_t, &expect_reply->tuple);
+ expect_reply->saved_proto.gre.key = htons(nat_pptp_info->pns_call_id);
+ expect_reply->tuple.src.u.gre.key = htons(nat_pptp_info->pac_call_id);
+ expect_reply->tuple.dst.u.gre.key = htons(ct_pptp_info->pns_call_id);
+ inv_t.src.ip = orig_t->src.ip;
+ inv_t.dst.ip = orig_t->dst.ip;
+ inv_t.src.u.gre.key = htons(nat_pptp_info->pns_call_id);
+ inv_t.dst.u.gre.key = htons(ct_pptp_info->pac_call_id);
+
+ if (!ip_conntrack_expect_related(expect_reply)) {
+ DEBUGP("successfully registered expect\n");
+ } else {
+ DEBUGP("can't expect_related(expect_reply)\n");
+ ip_conntrack_unexpect_related(expect_orig);
+ return 1;
+ }
+
+ if (ip_ct_gre_keymap_add(ct, &expect_reply->tuple, 0) < 0) {
+ DEBUGP("can't register original keymap\n");
+ ip_conntrack_unexpect_related(expect_orig);
+ ip_conntrack_unexpect_related(expect_reply);
+ return 1;
+ }
+
+ if (ip_ct_gre_keymap_add(ct, &inv_t, 1) < 0) {
+ DEBUGP("can't register reply keymap\n");
+ ip_conntrack_unexpect_related(expect_orig);
+ ip_conntrack_unexpect_related(expect_reply);
+ ip_ct_gre_keymap_destroy(ct);
+ return 1;
+ }
+
+ return 0;
+}
+
+/* inbound packets == from PAC to PNS */
+static int
+pptp_inbound_pkt(struct sk_buff **pskb,
+ struct ip_conntrack *ct,
+ enum ip_conntrack_info ctinfo,
+ struct PptpControlHeader *ctlh,
+ union pptp_ctrl_union *pptpReq)
+{
+ struct ip_nat_pptp *nat_pptp_info = &ct->nat.help.nat_pptp_info;
+ u_int16_t msg, new_cid = 0, new_pcid, *pcid = NULL, *cid = NULL;
+
+ int ret = NF_ACCEPT, rv;
+
+ new_pcid = htons(nat_pptp_info->pns_call_id);
+
+ switch (msg = ntohs(ctlh->messageType)) {
+ case PPTP_OUT_CALL_REPLY:
+ pcid = &pptpReq->ocack.peersCallID;
+ cid = &pptpReq->ocack.callID;
+ break;
+ case PPTP_IN_CALL_CONNECT:
+ pcid = &pptpReq->iccon.peersCallID;
+ break;
+ case PPTP_IN_CALL_REQUEST:
+ /* only need to nat in case PAC is behind NAT box */
+ break;
+ case PPTP_WAN_ERROR_NOTIFY:
+ pcid = &pptpReq->wanerr.peersCallID;
+ break;
+ case PPTP_CALL_DISCONNECT_NOTIFY:
+ pcid = &pptpReq->disc.callID;
+ break;
+ case PPTP_SET_LINK_INFO:
+ pcid = &pptpReq->setlink.peersCallID;
+ break;
+
+ default:
+ DEBUGP("unknown inbound packet %s\n", (msg <= PPTP_MSG_MAX)?
+ pptp_msg_name[msg]:pptp_msg_name[0]);
+ /* fall through */
+
+ case PPTP_START_SESSION_REQUEST:
+ case PPTP_START_SESSION_REPLY:
+ case PPTP_STOP_SESSION_REQUEST:
+ case PPTP_STOP_SESSION_REPLY:
+ case PPTP_ECHO_REQUEST:
+ case PPTP_ECHO_REPLY:
+ /* no need to alter packet */
+ return NF_ACCEPT;
+ }
+
+ /* only OUT_CALL_REPLY, IN_CALL_CONNECT, IN_CALL_REQUEST,
+ * WAN_ERROR_NOTIFY, CALL_DISCONNECT_NOTIFY pass down here */
+
+ /* mangle packet */
+ IP_NF_ASSERT(pcid);
+ DEBUGP("altering peer call id from 0x%04x to 0x%04x\n",
+ ntohs(*pcid), ntohs(new_pcid));
+
+ rv = ip_nat_mangle_tcp_packet(pskb, ct, ctinfo,
+ (void *)pcid - ((void *)ctlh - sizeof(struct pptp_pkt_hdr)),
+ sizeof(new_pcid), (char *)&new_pcid,
+ sizeof(new_pcid));
+ if (rv != NF_ACCEPT)
+ return rv;
+
+ if (new_cid) {
+ IP_NF_ASSERT(cid);
+ DEBUGP("altering call id from 0x%04x to 0x%04x\n",
+ ntohs(*cid), ntohs(new_cid));
+ rv = ip_nat_mangle_tcp_packet(pskb, ct, ctinfo,
+ (void *)cid - ((void *)ctlh - sizeof(struct pptp_pkt_hdr)),
+ sizeof(new_cid),
+ (char *)&new_cid,
+ sizeof(new_cid));
+ if (rv != NF_ACCEPT)
+ return rv;
+ }
+
+ /* check for earlier return value of 'switch' above */
+ if (ret != NF_ACCEPT)
+ return ret;
+
+ /* great, at least we don't need to resize packets */
+ return NF_ACCEPT;
+}
+
+
+extern int __init ip_nat_proto_gre_init(void);
+extern void __exit ip_nat_proto_gre_fini(void);
+
+static int __init init(void)
+{
+ int ret;
+
+ DEBUGP("%s: registering NAT helper\n", __FILE__);
+
+ ret = ip_nat_proto_gre_init();
+ if (ret < 0)
+ return ret;
+
+ BUG_ON(ip_nat_pptp_hook_outbound);
+ ip_nat_pptp_hook_outbound = &pptp_outbound_pkt;
+
+ BUG_ON(ip_nat_pptp_hook_inbound);
+ ip_nat_pptp_hook_inbound = &pptp_inbound_pkt;
+
+ BUG_ON(ip_nat_pptp_hook_exp_gre);
+ ip_nat_pptp_hook_exp_gre = &pptp_exp_gre;
+
+ BUG_ON(ip_nat_pptp_hook_expectfn);
+ ip_nat_pptp_hook_expectfn = &pptp_nat_expected;
+
+ printk("ip_nat_pptp version %s loaded\n", IP_NAT_PPTP_VERSION);
+ return 0;
+}
+
+static void __exit fini(void)
+{
+ DEBUGP("cleanup_module\n" );
+
+ ip_nat_pptp_hook_expectfn = NULL;
+ ip_nat_pptp_hook_exp_gre = NULL;
+ ip_nat_pptp_hook_inbound = NULL;
+ ip_nat_pptp_hook_outbound = NULL;
+
+ ip_nat_proto_gre_fini();
+ /* Make sure noone calls it, meanwhile */
+ synchronize_net();
+
+ printk("ip_nat_pptp version %s unloaded\n", IP_NAT_PPTP_VERSION);
+}
+
+module_init(init);
+module_exit(fini);
diff --git a/net/ipv4/netfilter/ip_nat_proto_gre.c b/net/ipv4/netfilter/ip_nat_proto_gre.c
new file mode 100644
index 0000000..7c12854
--- /dev/null
+++ b/net/ipv4/netfilter/ip_nat_proto_gre.c
@@ -0,0 +1,214 @@
+/*
+ * ip_nat_proto_gre.c - Version 2.0
+ *
+ * NAT protocol helper module for GRE.
+ *
+ * GRE is a generic encapsulation protocol, which is generally not very
+ * suited for NAT, as it has no protocol-specific part as port numbers.
+ *
+ * It has an optional key field, which may help us distinguishing two
+ * connections between the same two hosts.
+ *
+ * GRE is defined in RFC 1701 and RFC 1702, as well as RFC 2784
+ *
+ * PPTP is built on top of a modified version of GRE, and has a mandatory
+ * field called "CallID", which serves us for the same purpose as the key
+ * field in plain GRE.
+ *
+ * Documentation about PPTP can be found in RFC 2637
+ *
+ * (C) 2000-2005 by Harald Welte <laforge@gnumonks.org>
+ *
+ * Development of this code funded by Astaro AG (http://www.astaro.com/)
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/ip.h>
+#include <linux/netfilter_ipv4/ip_nat.h>
+#include <linux/netfilter_ipv4/ip_nat_rule.h>
+#include <linux/netfilter_ipv4/ip_nat_protocol.h>
+#include <linux/netfilter_ipv4/ip_conntrack_proto_gre.h>
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Harald Welte <laforge@gnumonks.org>");
+MODULE_DESCRIPTION("Netfilter NAT protocol helper module for GRE");
+
+#if 0
+#define DEBUGP(format, args...) printk(KERN_DEBUG "%s:%s: " format, __FILE__, \
+ __FUNCTION__, ## args)
+#else
+#define DEBUGP(x, args...)
+#endif
+
+/* is key in given range between min and max */
+static int
+gre_in_range(const struct ip_conntrack_tuple *tuple,
+ enum ip_nat_manip_type maniptype,
+ const union ip_conntrack_manip_proto *min,
+ const union ip_conntrack_manip_proto *max)
+{
+ u_int32_t key;
+
+ if (maniptype == IP_NAT_MANIP_SRC)
+ key = tuple->src.u.gre.key;
+ else
+ key = tuple->dst.u.gre.key;
+
+ return ntohl(key) >= ntohl(min->gre.key)
+ && ntohl(key) <= ntohl(max->gre.key);
+}
+
+/* generate unique tuple ... */
+static int
+gre_unique_tuple(struct ip_conntrack_tuple *tuple,
+ const struct ip_nat_range *range,
+ enum ip_nat_manip_type maniptype,
+ const struct ip_conntrack *conntrack)
+{
+ static u_int16_t key;
+ u_int16_t *keyptr;
+ unsigned int min, i, range_size;
+
+ if (maniptype == IP_NAT_MANIP_SRC)
+ keyptr = &tuple->src.u.gre.key;
+ else
+ keyptr = &tuple->dst.u.gre.key;
+
+ if (!(range->flags & IP_NAT_RANGE_PROTO_SPECIFIED)) {
+ DEBUGP("%p: NATing GRE PPTP\n", conntrack);
+ min = 1;
+ range_size = 0xffff;
+ } else {
+ min = ntohl(range->min.gre.key);
+ range_size = ntohl(range->max.gre.key) - min + 1;
+ }
+
+ DEBUGP("min = %u, range_size = %u\n", min, range_size);
+
+ for (i = 0; i < range_size; i++, key++) {
+ *keyptr = htonl(min + key % range_size);
+ if (!ip_nat_used_tuple(tuple, conntrack))
+ return 1;
+ }
+
+ DEBUGP("%p: no NAT mapping\n", conntrack);
+
+ return 0;
+}
+
+/* manipulate a GRE packet according to maniptype */
+static int
+gre_manip_pkt(struct sk_buff **pskb,
+ unsigned int iphdroff,
+ const struct ip_conntrack_tuple *tuple,
+ enum ip_nat_manip_type maniptype)
+{
+ struct gre_hdr *greh;
+ struct gre_hdr_pptp *pgreh;
+ struct iphdr *iph = (struct iphdr *)((*pskb)->data + iphdroff);
+ unsigned int hdroff = iphdroff + iph->ihl*4;
+
+ /* pgreh includes two optional 32bit fields which are not required
+ * to be there. That's where the magic '8' comes from */
+ if (!skb_make_writable(pskb, hdroff + sizeof(*pgreh)-8))
+ return 0;
+
+ greh = (void *)(*pskb)->data + hdroff;
+ pgreh = (struct gre_hdr_pptp *) greh;
+
+ /* we only have destination manip of a packet, since 'source key'
+ * is not present in the packet itself */
+ if (maniptype == IP_NAT_MANIP_DST) {
+ /* key manipulation is always dest */
+ switch (greh->version) {
+ case 0:
+ if (!greh->key) {
+ DEBUGP("can't nat GRE w/o key\n");
+ break;
+ }
+ if (greh->csum) {
+ /* FIXME: Never tested this code... */
+ *(gre_csum(greh)) =
+ ip_nat_cheat_check(~*(gre_key(greh)),
+ tuple->dst.u.gre.key,
+ *(gre_csum(greh)));
+ }
+ *(gre_key(greh)) = tuple->dst.u.gre.key;
+ break;
+ case GRE_VERSION_PPTP:
+ DEBUGP("call_id -> 0x%04x\n",
+ ntohl(tuple->dst.u.gre.key));
+ pgreh->call_id = htons(ntohl(tuple->dst.u.gre.key));
+ break;
+ default:
+ DEBUGP("can't nat unknown GRE version\n");
+ return 0;
+ break;
+ }
+ }
+ return 1;
+}
+
+/* print out a nat tuple */
+static unsigned int
+gre_print(char *buffer,
+ const struct ip_conntrack_tuple *match,
+ const struct ip_conntrack_tuple *mask)
+{
+ unsigned int len = 0;
+
+ if (mask->src.u.gre.key)
+ len += sprintf(buffer + len, "srckey=0x%x ",
+ ntohl(match->src.u.gre.key));
+
+ if (mask->dst.u.gre.key)
+ len += sprintf(buffer + len, "dstkey=0x%x ",
+ ntohl(match->src.u.gre.key));
+
+ return len;
+}
+
+/* print a range of keys */
+static unsigned int
+gre_print_range(char *buffer, const struct ip_nat_range *range)
+{
+ if (range->min.gre.key != 0
+ || range->max.gre.key != 0xFFFF) {
+ if (range->min.gre.key == range->max.gre.key)
+ return sprintf(buffer, "key 0x%x ",
+ ntohl(range->min.gre.key));
+ else
+ return sprintf(buffer, "keys 0x%u-0x%u ",
+ ntohl(range->min.gre.key),
+ ntohl(range->max.gre.key));
+ } else
+ return 0;
+}
+
+/* nat helper struct */
+static struct ip_nat_protocol gre = {
+ .name = "GRE",
+ .protonum = IPPROTO_GRE,
+ .manip_pkt = gre_manip_pkt,
+ .in_range = gre_in_range,
+ .unique_tuple = gre_unique_tuple,
+ .print = gre_print,
+ .print_range = gre_print_range,
+#if defined(CONFIG_IP_NF_CONNTRACK_NETLINK) || \
+ defined(CONFIG_IP_NF_CONNTRACK_NETLINK_MODULE)
+ .range_to_nfattr = ip_nat_port_range_to_nfattr,
+ .nfattr_to_range = ip_nat_port_nfattr_to_range,
+#endif
+};
+
+int __init ip_nat_proto_gre_init(void)
+{
+ return ip_nat_protocol_register(&gre);
+}
+
+void __exit ip_nat_proto_gre_fini(void)
+{
+ ip_nat_protocol_unregister(&gre);
+}
diff --git a/net/ipv4/netfilter/ipt_CLUSTERIP.c b/net/ipv4/netfilter/ipt_CLUSTERIP.c
index 7d38913..9bcb398 100644
--- a/net/ipv4/netfilter/ipt_CLUSTERIP.c
+++ b/net/ipv4/netfilter/ipt_CLUSTERIP.c
@@ -13,6 +13,7 @@
#include <linux/config.h>
#include <linux/proc_fs.h>
#include <linux/jhash.h>
+#include <linux/bitops.h>
#include <linux/skbuff.h>
#include <linux/ip.h>
#include <linux/tcp.h>
@@ -30,7 +31,7 @@
#include <linux/netfilter_ipv4/ipt_CLUSTERIP.h>
#include <linux/netfilter_ipv4/ip_conntrack.h>
-#define CLUSTERIP_VERSION "0.7"
+#define CLUSTERIP_VERSION "0.8"
#define DEBUG_CLUSTERIP
@@ -49,13 +50,14 @@ MODULE_DESCRIPTION("iptables target for CLUSTERIP");
struct clusterip_config {
struct list_head list; /* list of all configs */
atomic_t refcount; /* reference count */
+ atomic_t entries; /* number of entries/rules
+ * referencing us */
u_int32_t clusterip; /* the IP address */
u_int8_t clustermac[ETH_ALEN]; /* the MAC address */
struct net_device *dev; /* device */
u_int16_t num_total_nodes; /* total number of nodes */
- u_int16_t num_local_nodes; /* number of local nodes */
- u_int16_t local_nodes[CLUSTERIP_MAX_NODES]; /* node number array */
+ unsigned long local_nodes; /* node number array */
#ifdef CONFIG_PROC_FS
struct proc_dir_entry *pde; /* proc dir entry */
@@ -66,8 +68,7 @@ struct clusterip_config {
static LIST_HEAD(clusterip_configs);
-/* clusterip_lock protects the clusterip_configs list _AND_ the configurable
- * data within all structurses (num_local_nodes, local_nodes[]) */
+/* clusterip_lock protects the clusterip_configs list */
static DEFINE_RWLOCK(clusterip_lock);
#ifdef CONFIG_PROC_FS
@@ -76,23 +77,48 @@ static struct proc_dir_entry *clusterip_procdir;
#endif
static inline void
-clusterip_config_get(struct clusterip_config *c) {
+clusterip_config_get(struct clusterip_config *c)
+{
atomic_inc(&c->refcount);
}
static inline void
-clusterip_config_put(struct clusterip_config *c) {
- if (atomic_dec_and_test(&c->refcount)) {
+clusterip_config_put(struct clusterip_config *c)
+{
+ if (atomic_dec_and_test(&c->refcount))
+ kfree(c);
+}
+
+/* increase the count of entries(rules) using/referencing this config */
+static inline void
+clusterip_config_entry_get(struct clusterip_config *c)
+{
+ atomic_inc(&c->entries);
+}
+
+/* decrease the count of entries using/referencing this config. If last
+ * entry(rule) is removed, remove the config from lists, but don't free it
+ * yet, since proc-files could still be holding references */
+static inline void
+clusterip_config_entry_put(struct clusterip_config *c)
+{
+ if (atomic_dec_and_test(&c->entries)) {
write_lock_bh(&clusterip_lock);
list_del(&c->list);
write_unlock_bh(&clusterip_lock);
+
dev_mc_delete(c->dev, c->clustermac, ETH_ALEN, 0);
dev_put(c->dev);
- kfree(c);
+
+ /* In case anyone still accesses the file, the open/close
+ * functions are also incrementing the refcount on their own,
+ * so it's safe to remove the entry even if it's in use. */
+#ifdef CONFIG_PROC_FS
+ remove_proc_entry(c->pde->name, c->pde->parent);
+#endif
}
}
-
static struct clusterip_config *
__clusterip_config_find(u_int32_t clusterip)
{
@@ -111,7 +137,7 @@ __clusterip_config_find(u_int32_t clusterip)
}
static inline struct clusterip_config *
-clusterip_config_find_get(u_int32_t clusterip)
+clusterip_config_find_get(u_int32_t clusterip, int entry)
{
struct clusterip_config *c;
@@ -122,11 +148,24 @@ clusterip_config_find_get(u_int32_t clusterip)
return NULL;
}
atomic_inc(&c->refcount);
+ if (entry)
+ atomic_inc(&c->entries);
read_unlock_bh(&clusterip_lock);
return c;
}
+static void
+clusterip_config_init_nodelist(struct clusterip_config *c,
+ const struct ipt_clusterip_tgt_info *i)
+{
+ int n;
+
+ for (n = 0; n < i->num_local_nodes; n++) {
+ set_bit(i->local_nodes[n] - 1, &c->local_nodes);
+ }
+}
+
static struct clusterip_config *
clusterip_config_init(struct ipt_clusterip_tgt_info *i, u_int32_t ip,
struct net_device *dev)
@@ -143,11 +182,11 @@ clusterip_config_init(struct ipt_clusterip_tgt_info *i, u_int32_t ip,
c->clusterip = ip;
memcpy(&c->clustermac, &i->clustermac, ETH_ALEN);
c->num_total_nodes = i->num_total_nodes;
- c->num_local_nodes = i->num_local_nodes;
- memcpy(&c->local_nodes, &i->local_nodes, sizeof(c->local_nodes));
+ clusterip_config_init_nodelist(c, i);
c->hash_mode = i->hash_mode;
c->hash_initval = i->hash_initval;
atomic_set(&c->refcount, 1);
+ atomic_set(&c->entries, 1);
#ifdef CONFIG_PROC_FS
/* create proc dir entry */
@@ -171,53 +210,28 @@ clusterip_config_init(struct ipt_clusterip_tgt_info *i, u_int32_t ip,
static int
clusterip_add_node(struct clusterip_config *c, u_int16_t nodenum)
{
- int i;
-
- write_lock_bh(&clusterip_lock);
- if (c->num_local_nodes >= CLUSTERIP_MAX_NODES
- || nodenum > CLUSTERIP_MAX_NODES) {
- write_unlock_bh(&clusterip_lock);
+ if (nodenum == 0 ||
+ nodenum > c->num_total_nodes)
return 1;
- }
-
- /* check if we alrady have this number in our array */
- for (i = 0; i < c->num_local_nodes; i++) {
- if (c->local_nodes[i] == nodenum) {
- write_unlock_bh(&clusterip_lock);
- return 1;
- }
- }
- c->local_nodes[c->num_local_nodes++] = nodenum;
+ /* check if we already have this number in our bitfield */
+ if (test_and_set_bit(nodenum - 1, &c->local_nodes))
+ return 1;
- write_unlock_bh(&clusterip_lock);
return 0;
}
static int
clusterip_del_node(struct clusterip_config *c, u_int16_t nodenum)
{
- int i;
-
- write_lock_bh(&clusterip_lock);
-
- if (c->num_local_nodes <= 1 || nodenum > CLUSTERIP_MAX_NODES) {
- write_unlock_bh(&clusterip_lock);
+ if (nodenum == 0 ||
+ nodenum > c->num_total_nodes)
return 1;
- }
- for (i = 0; i < c->num_local_nodes; i++) {
- if (c->local_nodes[i] == nodenum) {
- int size = sizeof(u_int16_t)*(c->num_local_nodes-(i+1));
- memmove(&c->local_nodes[i], &c->local_nodes[i+1], size);
- c->num_local_nodes--;
- write_unlock_bh(&clusterip_lock);
- return 0;
- }
- }
+ if (test_and_clear_bit(nodenum - 1, &c->local_nodes))
+ return 0;
- write_unlock_bh(&clusterip_lock);
return 1;
}
@@ -285,25 +299,7 @@ clusterip_hashfn(struct sk_buff *skb, struct clusterip_config *config)
static inline int
clusterip_responsible(struct clusterip_config *config, u_int32_t hash)
{
- int i;
-
- read_lock_bh(&clusterip_lock);
-
- if (config->num_local_nodes == 0) {
- read_unlock_bh(&clusterip_lock);
- return 0;
- }
-
- for (i = 0; i < config->num_local_nodes; i++) {
- if (config->local_nodes[i] == hash) {
- read_unlock_bh(&clusterip_lock);
- return 1;
- }
- }
-
- read_unlock_bh(&clusterip_lock);
-
- return 0;
+ return test_bit(hash - 1, &config->local_nodes);
}
/***********************************************************************
@@ -415,8 +411,26 @@ checkentry(const char *tablename,
/* FIXME: further sanity checks */
- config = clusterip_config_find_get(e->ip.dst.s_addr);
- if (!config) {
+ config = clusterip_config_find_get(e->ip.dst.s_addr, 1);
+ if (config) {
+ if (cipinfo->config != NULL) {
+ /* Case A: This is an entry that gets reloaded, since
+ * it still has a cipinfo->config pointer. Simply
+ * increase the entry refcount and return */
+ if (cipinfo->config != config) {
+ printk(KERN_ERR "CLUSTERIP: Reloaded entry "
+ "has invalid config pointer!\n");
+ return 0;
+ }
+ clusterip_config_entry_get(cipinfo->config);
+ } else {
+ /* Case B: This is a new rule referring to an existing
+ * clusterip config. */
+ cipinfo->config = config;
+ clusterip_config_entry_get(cipinfo->config);
+ }
+ } else {
+ /* Case C: This is a completely new clusterip config */
if (!(cipinfo->flags & CLUSTERIP_FLAG_NEW)) {
printk(KERN_WARNING "CLUSTERIP: no config found for %u.%u.%u.%u, need 'new'\n", NIPQUAD(e->ip.dst.s_addr));
return 0;
@@ -443,10 +457,9 @@ checkentry(const char *tablename,
}
dev_mc_add(config->dev,config->clustermac, ETH_ALEN, 0);
}
+ cipinfo->config = config;
}
- cipinfo->config = config;
-
return 1;
}
@@ -455,13 +468,10 @@ static void destroy(void *matchinfo, unsigned int matchinfosize)
{
struct ipt_clusterip_tgt_info *cipinfo = matchinfo;
- /* we first remove the proc entry and then drop the reference
- * count. In case anyone still accesses the file, the open/close
- * functions are also incrementing the refcount on their own */
-#ifdef CONFIG_PROC_FS
- remove_proc_entry(cipinfo->config->pde->name,
- cipinfo->config->pde->parent);
-#endif
+ /* if no more entries are referencing the config, remove it
+ * from the list and destroy the proc entry */
+ clusterip_config_entry_put(cipinfo->config);
+
clusterip_config_put(cipinfo->config);
}
@@ -533,7 +543,7 @@ arp_mangle(unsigned int hook,
/* if there is no clusterip configuration for the arp reply's
* source ip, we don't want to mangle it */
- c = clusterip_config_find_get(payload->src_ip);
+ c = clusterip_config_find_get(payload->src_ip, 0);
if (!c)
return NF_ACCEPT;
@@ -574,56 +584,69 @@ static struct nf_hook_ops cip_arp_ops = {
#ifdef CONFIG_PROC_FS
+struct clusterip_seq_position {
+ unsigned int pos; /* position */
+ unsigned int weight; /* number of bits set == size */
+ unsigned int bit; /* current bit */
+ unsigned long val; /* current value */
+};
+
static void *clusterip_seq_start(struct seq_file *s, loff_t *pos)
{
struct proc_dir_entry *pde = s->private;
struct clusterip_config *c = pde->data;
- unsigned int *nodeidx;
-
- read_lock_bh(&clusterip_lock);
- if (*pos >= c->num_local_nodes)
+ unsigned int weight;
+ u_int32_t local_nodes;
+ struct clusterip_seq_position *idx;
+
+ /* FIXME: possible race */
+ local_nodes = c->local_nodes;
+ weight = hweight32(local_nodes);
+ if (*pos >= weight)
return NULL;
- nodeidx = kmalloc(sizeof(unsigned int), GFP_KERNEL);
- if (!nodeidx)
+ idx = kmalloc(sizeof(struct clusterip_seq_position), GFP_KERNEL);
+ if (!idx)
return ERR_PTR(-ENOMEM);
- *nodeidx = *pos;
- return nodeidx;
+ idx->pos = *pos;
+ idx->weight = weight;
+ idx->bit = ffs(local_nodes);
+ idx->val = local_nodes;
+ clear_bit(idx->bit - 1, &idx->val);
+
+ return idx;
}
static void *clusterip_seq_next(struct seq_file *s, void *v, loff_t *pos)
{
- struct proc_dir_entry *pde = s->private;
- struct clusterip_config *c = pde->data;
- unsigned int *nodeidx = (unsigned int *)v;
+ struct clusterip_seq_position *idx = (struct clusterip_seq_position *)v;
- *pos = ++(*nodeidx);
- if (*pos >= c->num_local_nodes) {
+ *pos = ++idx->pos;
+ if (*pos >= idx->weight) {
kfree(v);
return NULL;
}
- return nodeidx;
+ idx->bit = ffs(idx->val);
+ clear_bit(idx->bit - 1, &idx->val);
+ return idx;
}
static void clusterip_seq_stop(struct seq_file *s, void *v)
{
kfree(v);
-
- read_unlock_bh(&clusterip_lock);
}
static int clusterip_seq_show(struct seq_file *s, void *v)
{
- struct proc_dir_entry *pde = s->private;
- struct clusterip_config *c = pde->data;
- unsigned int *nodeidx = (unsigned int *)v;
+ struct clusterip_seq_position *idx = (struct clusterip_seq_position *)v;
- if (*nodeidx != 0)
+ if (idx->pos != 0)
seq_putc(s, ',');
- seq_printf(s, "%u", c->local_nodes[*nodeidx]);
- if (*nodeidx == c->num_local_nodes-1)
+ seq_printf(s, "%u", idx->bit);
+
+ if (idx->pos == idx->weight - 1)
seq_putc(s, '\n');
return 0;
diff --git a/net/ipv4/raw.c b/net/ipv4/raw.c
index 304bb0a..4b0d7e4 100644
--- a/net/ipv4/raw.c
+++ b/net/ipv4/raw.c
@@ -361,7 +361,7 @@ static void raw_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
if (type && code) {
get_user(fl->fl_icmp_type, type);
- __get_user(fl->fl_icmp_code, code);
+ get_user(fl->fl_icmp_code, code);
probed = 1;
}
break;
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 29222b96..a7537c7 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -979,14 +979,19 @@ tcp_sacktag_write_queue(struct sock *sk, struct sk_buff *ack_skb, u32 prior_snd_
if (!before(TCP_SKB_CB(skb)->seq, end_seq))
break;
+ in_sack = !after(start_seq, TCP_SKB_CB(skb)->seq) &&
+ !before(end_seq, TCP_SKB_CB(skb)->end_seq);
+
pcount = tcp_skb_pcount(skb);
- if (pcount > 1 &&
- (after(start_seq, TCP_SKB_CB(skb)->seq) ||
- before(end_seq, TCP_SKB_CB(skb)->end_seq))) {
+ if (pcount > 1 && !in_sack &&
+ after(TCP_SKB_CB(skb)->end_seq, start_seq)) {
unsigned int pkt_len;
- if (after(start_seq, TCP_SKB_CB(skb)->seq))
+ in_sack = !after(start_seq,
+ TCP_SKB_CB(skb)->seq);
+
+ if (!in_sack)
pkt_len = (start_seq -
TCP_SKB_CB(skb)->seq);
else
@@ -999,9 +1004,6 @@ tcp_sacktag_write_queue(struct sock *sk, struct sk_buff *ack_skb, u32 prior_snd_
fack_count += pcount;
- in_sack = !after(start_seq, TCP_SKB_CB(skb)->seq) &&
- !before(end_seq, TCP_SKB_CB(skb)->end_seq);
-
sacked = TCP_SKB_CB(skb)->sacked;
/* Account D-SACK for retransmitted packet. */
diff --git a/net/ipv4/tcp_minisocks.c b/net/ipv4/tcp_minisocks.c
index a88db28..b1a63b2 100644
--- a/net/ipv4/tcp_minisocks.c
+++ b/net/ipv4/tcp_minisocks.c
@@ -384,7 +384,7 @@ struct sock *tcp_create_openreq_child(struct sock *sk, struct request_sock *req,
newtp->frto_counter = 0;
newtp->frto_highmark = 0;
- newicsk->icsk_ca_ops = &tcp_reno;
+ newicsk->icsk_ca_ops = &tcp_init_congestion_ops;
tcp_set_ca_state(newsk, TCP_CA_Open);
tcp_init_xmit_timers(newsk);
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index c10e443..5dd6dd7 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -435,6 +435,8 @@ int tcp_fragment(struct sock *sk, struct sk_buff *skb, u32 len, unsigned int mss
int nsize, old_factor;
u16 flags;
+ BUG_ON(len >= skb->len);
+
nsize = skb_headlen(skb) - len;
if (nsize < 0)
nsize = 0;
@@ -459,9 +461,7 @@ int tcp_fragment(struct sock *sk, struct sk_buff *skb, u32 len, unsigned int mss
flags = TCP_SKB_CB(skb)->flags;
TCP_SKB_CB(skb)->flags = flags & ~(TCPCB_FLAG_FIN|TCPCB_FLAG_PSH);
TCP_SKB_CB(buff)->flags = flags;
- TCP_SKB_CB(buff)->sacked =
- (TCP_SKB_CB(skb)->sacked &
- (TCPCB_LOST | TCPCB_EVER_RETRANS | TCPCB_AT_TAIL));
+ TCP_SKB_CB(buff)->sacked = TCP_SKB_CB(skb)->sacked;
TCP_SKB_CB(skb)->sacked &= ~TCPCB_AT_TAIL;
if (!skb_shinfo(skb)->nr_frags && skb->ip_summed != CHECKSUM_HW) {
@@ -499,6 +499,12 @@ int tcp_fragment(struct sock *sk, struct sk_buff *skb, u32 len, unsigned int mss
tcp_skb_pcount(buff);
tp->packets_out -= diff;
+
+ if (TCP_SKB_CB(skb)->sacked & TCPCB_SACKED_ACKED)
+ tp->sacked_out -= diff;
+ if (TCP_SKB_CB(skb)->sacked & TCPCB_SACKED_RETRANS)
+ tp->retrans_out -= diff;
+
if (TCP_SKB_CB(skb)->sacked & TCPCB_LOST) {
tp->lost_out -= diff;
tp->left_out -= diff;
diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c
index 29fed6e..519899f 100644
--- a/net/ipv6/mcast.c
+++ b/net/ipv6/mcast.c
@@ -1968,7 +1968,7 @@ static void ip6_mc_clear_src(struct ifmcaddr6 *pmc)
}
pmc->mca_sources = NULL;
pmc->mca_sfmode = MCAST_EXCLUDE;
- pmc->mca_sfcount[MCAST_EXCLUDE] = 0;
+ pmc->mca_sfcount[MCAST_INCLUDE] = 0;
pmc->mca_sfcount[MCAST_EXCLUDE] = 1;
}
diff --git a/net/ipv6/netfilter/ip6_tables.c b/net/ipv6/netfilter/ip6_tables.c
index 1cb8adb..2da514b 100644
--- a/net/ipv6/netfilter/ip6_tables.c
+++ b/net/ipv6/netfilter/ip6_tables.c
@@ -1955,6 +1955,57 @@ static void __exit fini(void)
#endif
}
+/*
+ * find specified header up to transport protocol header.
+ * If found target header, the offset to the header is set to *offset
+ * and return 0. otherwise, return -1.
+ *
+ * Notes: - non-1st Fragment Header isn't skipped.
+ * - ESP header isn't skipped.
+ * - The target header may be trancated.
+ */
+int ipv6_find_hdr(const struct sk_buff *skb, unsigned int *offset, u8 target)
+{
+ unsigned int start = (u8*)(skb->nh.ipv6h + 1) - skb->data;
+ u8 nexthdr = skb->nh.ipv6h->nexthdr;
+ unsigned int len = skb->len - start;
+
+ while (nexthdr != target) {
+ struct ipv6_opt_hdr _hdr, *hp;
+ unsigned int hdrlen;
+
+ if ((!ipv6_ext_hdr(nexthdr)) || nexthdr == NEXTHDR_NONE)
+ return -1;
+ hp = skb_header_pointer(skb, start, sizeof(_hdr), &_hdr);
+ if (hp == NULL)
+ return -1;
+ if (nexthdr == NEXTHDR_FRAGMENT) {
+ unsigned short _frag_off, *fp;
+ fp = skb_header_pointer(skb,
+ start+offsetof(struct frag_hdr,
+ frag_off),
+ sizeof(_frag_off),
+ &_frag_off);
+ if (fp == NULL)
+ return -1;
+
+ if (ntohs(*fp) & ~0x7)
+ return -1;
+ hdrlen = 8;
+ } else if (nexthdr == NEXTHDR_AUTH)
+ hdrlen = (hp->hdrlen + 2) << 2;
+ else
+ hdrlen = ipv6_optlen(hp);
+
+ nexthdr = hp->nexthdr;
+ len -= hdrlen;
+ start += hdrlen;
+ }
+
+ *offset = start;
+ return 0;
+}
+
EXPORT_SYMBOL(ip6t_register_table);
EXPORT_SYMBOL(ip6t_unregister_table);
EXPORT_SYMBOL(ip6t_do_table);
@@ -1963,6 +2014,7 @@ EXPORT_SYMBOL(ip6t_unregister_match);
EXPORT_SYMBOL(ip6t_register_target);
EXPORT_SYMBOL(ip6t_unregister_target);
EXPORT_SYMBOL(ip6t_ext_hdr);
+EXPORT_SYMBOL(ipv6_find_hdr);
module_init(init);
module_exit(fini);
diff --git a/net/ipv6/netfilter/ip6t_ah.c b/net/ipv6/netfilter/ip6t_ah.c
index d5b94f1..dde3779 100644
--- a/net/ipv6/netfilter/ip6t_ah.c
+++ b/net/ipv6/netfilter/ip6t_ah.c
@@ -48,92 +48,21 @@ match(const struct sk_buff *skb,
unsigned int protoff,
int *hotdrop)
{
- struct ip_auth_hdr *ah = NULL, _ah;
+ struct ip_auth_hdr *ah, _ah;
const struct ip6t_ah *ahinfo = matchinfo;
- unsigned int temp;
- int len;
- u8 nexthdr;
unsigned int ptr;
unsigned int hdrlen = 0;
- /*DEBUGP("IPv6 AH entered\n");*/
- /* if (opt->auth == 0) return 0;
- * It does not filled on output */
-
- /* type of the 1st exthdr */
- nexthdr = skb->nh.ipv6h->nexthdr;
- /* pointer to the 1st exthdr */
- ptr = sizeof(struct ipv6hdr);
- /* available length */
- len = skb->len - ptr;
- temp = 0;
-
- while (ip6t_ext_hdr(nexthdr)) {
- struct ipv6_opt_hdr _hdr, *hp;
-
- DEBUGP("ipv6_ah header iteration \n");
-
- /* Is there enough space for the next ext header? */
- if (len < sizeof(struct ipv6_opt_hdr))
- return 0;
- /* No more exthdr -> evaluate */
- if (nexthdr == NEXTHDR_NONE)
- break;
- /* ESP -> evaluate */
- if (nexthdr == NEXTHDR_ESP)
- break;
-
- hp = skb_header_pointer(skb, ptr, sizeof(_hdr), &_hdr);
- BUG_ON(hp == NULL);
-
- /* Calculate the header length */
- if (nexthdr == NEXTHDR_FRAGMENT)
- hdrlen = 8;
- else if (nexthdr == NEXTHDR_AUTH)
- hdrlen = (hp->hdrlen+2)<<2;
- else
- hdrlen = ipv6_optlen(hp);
-
- /* AH -> evaluate */
- if (nexthdr == NEXTHDR_AUTH) {
- temp |= MASK_AH;
- break;
- }
-
-
- /* set the flag */
- switch (nexthdr) {
- case NEXTHDR_HOP:
- case NEXTHDR_ROUTING:
- case NEXTHDR_FRAGMENT:
- case NEXTHDR_AUTH:
- case NEXTHDR_DEST:
- break;
- default:
- DEBUGP("ipv6_ah match: unknown nextheader %u\n",nexthdr);
- return 0;
- }
-
- nexthdr = hp->nexthdr;
- len -= hdrlen;
- ptr += hdrlen;
- if (ptr > skb->len) {
- DEBUGP("ipv6_ah: new pointer too large! \n");
- break;
- }
- }
-
- /* AH header not found */
- if (temp != MASK_AH)
+ if (ipv6_find_hdr(skb, &ptr, NEXTHDR_AUTH) < 0)
return 0;
- if (len < sizeof(struct ip_auth_hdr)){
+ ah = skb_header_pointer(skb, ptr, sizeof(_ah), &_ah);
+ if (ah == NULL) {
*hotdrop = 1;
return 0;
}
- ah = skb_header_pointer(skb, ptr, sizeof(_ah), &_ah);
- BUG_ON(ah == NULL);
+ hdrlen = (ah->hdrlen + 2) << 2;
DEBUGP("IPv6 AH LEN %u %u ", hdrlen, ah->hdrlen);
DEBUGP("RES %04X ", ah->reserved);
diff --git a/net/ipv6/netfilter/ip6t_dst.c b/net/ipv6/netfilter/ip6t_dst.c
index 540925e..c450a63 100644
--- a/net/ipv6/netfilter/ip6t_dst.c
+++ b/net/ipv6/netfilter/ip6t_dst.c
@@ -63,8 +63,6 @@ match(const struct sk_buff *skb,
struct ipv6_opt_hdr _optsh, *oh;
const struct ip6t_opts *optinfo = matchinfo;
unsigned int temp;
- unsigned int len;
- u8 nexthdr;
unsigned int ptr;
unsigned int hdrlen = 0;
unsigned int ret = 0;
@@ -72,97 +70,25 @@ match(const struct sk_buff *skb,
u8 _optlen, *lp = NULL;
unsigned int optlen;
- /* type of the 1st exthdr */
- nexthdr = skb->nh.ipv6h->nexthdr;
- /* pointer to the 1st exthdr */
- ptr = sizeof(struct ipv6hdr);
- /* available length */
- len = skb->len - ptr;
- temp = 0;
-
- while (ip6t_ext_hdr(nexthdr)) {
- struct ipv6_opt_hdr _hdr, *hp;
-
- DEBUGP("ipv6_opts header iteration \n");
-
- /* Is there enough space for the next ext header? */
- if (len < (int)sizeof(struct ipv6_opt_hdr))
- return 0;
- /* No more exthdr -> evaluate */
- if (nexthdr == NEXTHDR_NONE) {
- break;
- }
- /* ESP -> evaluate */
- if (nexthdr == NEXTHDR_ESP) {
- break;
- }
-
- hp = skb_header_pointer(skb, ptr, sizeof(_hdr), &_hdr);
- BUG_ON(hp == NULL);
-
- /* Calculate the header length */
- if (nexthdr == NEXTHDR_FRAGMENT) {
- hdrlen = 8;
- } else if (nexthdr == NEXTHDR_AUTH)
- hdrlen = (hp->hdrlen+2)<<2;
- else
- hdrlen = ipv6_optlen(hp);
-
- /* OPTS -> evaluate */
#if HOPBYHOP
- if (nexthdr == NEXTHDR_HOP) {
- temp |= MASK_HOPOPTS;
+ if (ipv6_find_hdr(skb, &ptr, NEXTHDR_HOP) < 0)
#else
- if (nexthdr == NEXTHDR_DEST) {
- temp |= MASK_DSTOPTS;
+ if (ipv6_find_hdr(skb, &ptr, NEXTHDR_DEST) < 0)
#endif
- break;
- }
-
+ return 0;
- /* set the flag */
- switch (nexthdr){
- case NEXTHDR_HOP:
- case NEXTHDR_ROUTING:
- case NEXTHDR_FRAGMENT:
- case NEXTHDR_AUTH:
- case NEXTHDR_DEST:
- break;
- default:
- DEBUGP("ipv6_opts match: unknown nextheader %u\n",nexthdr);
- return 0;
- break;
- }
-
- nexthdr = hp->nexthdr;
- len -= hdrlen;
- ptr += hdrlen;
- if ( ptr > skb->len ) {
- DEBUGP("ipv6_opts: new pointer is too large! \n");
- break;
- }
- }
-
- /* OPTIONS header not found */
-#if HOPBYHOP
- if ( temp != MASK_HOPOPTS ) return 0;
-#else
- if ( temp != MASK_DSTOPTS ) return 0;
-#endif
-
- if (len < (int)sizeof(struct ipv6_opt_hdr)){
+ oh = skb_header_pointer(skb, ptr, sizeof(_optsh), &_optsh);
+ if (oh == NULL){
*hotdrop = 1;
return 0;
}
- if (len < hdrlen){
+ hdrlen = ipv6_optlen(oh);
+ if (skb->len - ptr < hdrlen){
/* Packet smaller than it's length field */
return 0;
}
- oh = skb_header_pointer(skb, ptr, sizeof(_optsh), &_optsh);
- BUG_ON(oh == NULL);
-
DEBUGP("IPv6 OPTS LEN %u %u ", hdrlen, oh->hdrlen);
DEBUGP("len %02X %04X %02X ",
diff --git a/net/ipv6/netfilter/ip6t_esp.c b/net/ipv6/netfilter/ip6t_esp.c
index e39dd23..24bc0cd 100644
--- a/net/ipv6/netfilter/ip6t_esp.c
+++ b/net/ipv6/netfilter/ip6t_esp.c
@@ -48,87 +48,22 @@ match(const struct sk_buff *skb,
unsigned int protoff,
int *hotdrop)
{
- struct ip_esp_hdr _esp, *eh = NULL;
+ struct ip_esp_hdr _esp, *eh;
const struct ip6t_esp *espinfo = matchinfo;
- unsigned int temp;
- int len;
- u8 nexthdr;
unsigned int ptr;
/* Make sure this isn't an evil packet */
/*DEBUGP("ipv6_esp entered \n");*/
- /* type of the 1st exthdr */
- nexthdr = skb->nh.ipv6h->nexthdr;
- /* pointer to the 1st exthdr */
- ptr = sizeof(struct ipv6hdr);
- /* available length */
- len = skb->len - ptr;
- temp = 0;
-
- while (ip6t_ext_hdr(nexthdr)) {
- struct ipv6_opt_hdr _hdr, *hp;
- int hdrlen;
-
- DEBUGP("ipv6_esp header iteration \n");
-
- /* Is there enough space for the next ext header? */
- if (len < sizeof(struct ipv6_opt_hdr))
- return 0;
- /* No more exthdr -> evaluate */
- if (nexthdr == NEXTHDR_NONE)
- break;
- /* ESP -> evaluate */
- if (nexthdr == NEXTHDR_ESP) {
- temp |= MASK_ESP;
- break;
- }
-
- hp = skb_header_pointer(skb, ptr, sizeof(_hdr), &_hdr);
- BUG_ON(hp == NULL);
-
- /* Calculate the header length */
- if (nexthdr == NEXTHDR_FRAGMENT)
- hdrlen = 8;
- else if (nexthdr == NEXTHDR_AUTH)
- hdrlen = (hp->hdrlen+2)<<2;
- else
- hdrlen = ipv6_optlen(hp);
-
- /* set the flag */
- switch (nexthdr) {
- case NEXTHDR_HOP:
- case NEXTHDR_ROUTING:
- case NEXTHDR_FRAGMENT:
- case NEXTHDR_AUTH:
- case NEXTHDR_DEST:
- break;
- default:
- DEBUGP("ipv6_esp match: unknown nextheader %u\n",nexthdr);
- return 0;
- }
-
- nexthdr = hp->nexthdr;
- len -= hdrlen;
- ptr += hdrlen;
- if (ptr > skb->len) {
- DEBUGP("ipv6_esp: new pointer too large! \n");
- break;
- }
- }
-
- /* ESP header not found */
- if (temp != MASK_ESP)
+ if (ipv6_find_hdr(skb, &ptr, NEXTHDR_ESP) < 0)
return 0;
- if (len < sizeof(struct ip_esp_hdr)) {
+ eh = skb_header_pointer(skb, ptr, sizeof(_esp), &_esp);
+ if (eh == NULL) {
*hotdrop = 1;
return 0;
}
- eh = skb_header_pointer(skb, ptr, sizeof(_esp), &_esp);
- BUG_ON(eh == NULL);
-
DEBUGP("IPv6 ESP SPI %u %08X\n", ntohl(eh->spi), ntohl(eh->spi));
return (eh != NULL)
diff --git a/net/ipv6/netfilter/ip6t_frag.c b/net/ipv6/netfilter/ip6t_frag.c
index 4bfa30a..085d5f8 100644
--- a/net/ipv6/netfilter/ip6t_frag.c
+++ b/net/ipv6/netfilter/ip6t_frag.c
@@ -48,90 +48,18 @@ match(const struct sk_buff *skb,
unsigned int protoff,
int *hotdrop)
{
- struct frag_hdr _frag, *fh = NULL;
+ struct frag_hdr _frag, *fh;
const struct ip6t_frag *fraginfo = matchinfo;
- unsigned int temp;
- int len;
- u8 nexthdr;
unsigned int ptr;
- unsigned int hdrlen = 0;
-
- /* type of the 1st exthdr */
- nexthdr = skb->nh.ipv6h->nexthdr;
- /* pointer to the 1st exthdr */
- ptr = sizeof(struct ipv6hdr);
- /* available length */
- len = skb->len - ptr;
- temp = 0;
-
- while (ip6t_ext_hdr(nexthdr)) {
- struct ipv6_opt_hdr _hdr, *hp;
-
- DEBUGP("ipv6_frag header iteration \n");
-
- /* Is there enough space for the next ext header? */
- if (len < (int)sizeof(struct ipv6_opt_hdr))
- return 0;
- /* No more exthdr -> evaluate */
- if (nexthdr == NEXTHDR_NONE) {
- break;
- }
- /* ESP -> evaluate */
- if (nexthdr == NEXTHDR_ESP) {
- break;
- }
-
- hp = skb_header_pointer(skb, ptr, sizeof(_hdr), &_hdr);
- BUG_ON(hp == NULL);
-
- /* Calculate the header length */
- if (nexthdr == NEXTHDR_FRAGMENT) {
- hdrlen = 8;
- } else if (nexthdr == NEXTHDR_AUTH)
- hdrlen = (hp->hdrlen+2)<<2;
- else
- hdrlen = ipv6_optlen(hp);
-
- /* FRAG -> evaluate */
- if (nexthdr == NEXTHDR_FRAGMENT) {
- temp |= MASK_FRAGMENT;
- break;
- }
-
-
- /* set the flag */
- switch (nexthdr){
- case NEXTHDR_HOP:
- case NEXTHDR_ROUTING:
- case NEXTHDR_FRAGMENT:
- case NEXTHDR_AUTH:
- case NEXTHDR_DEST:
- break;
- default:
- DEBUGP("ipv6_frag match: unknown nextheader %u\n",nexthdr);
- return 0;
- break;
- }
-
- nexthdr = hp->nexthdr;
- len -= hdrlen;
- ptr += hdrlen;
- if ( ptr > skb->len ) {
- DEBUGP("ipv6_frag: new pointer too large! \n");
- break;
- }
- }
-
- /* FRAG header not found */
- if ( temp != MASK_FRAGMENT ) return 0;
-
- if (len < sizeof(struct frag_hdr)){
- *hotdrop = 1;
- return 0;
- }
- fh = skb_header_pointer(skb, ptr, sizeof(_frag), &_frag);
- BUG_ON(fh == NULL);
+ if (ipv6_find_hdr(skb, &ptr, NEXTHDR_FRAGMENT) < 0)
+ return 0;
+
+ fh = skb_header_pointer(skb, ptr, sizeof(_frag), &_frag);
+ if (fh == NULL){
+ *hotdrop = 1;
+ return 0;
+ }
DEBUGP("INFO %04X ", fh->frag_off);
DEBUGP("OFFSET %04X ", ntohs(fh->frag_off) & ~0x7);
diff --git a/net/ipv6/netfilter/ip6t_hbh.c b/net/ipv6/netfilter/ip6t_hbh.c
index 27f3650..1d09485 100644
--- a/net/ipv6/netfilter/ip6t_hbh.c
+++ b/net/ipv6/netfilter/ip6t_hbh.c
@@ -63,8 +63,6 @@ match(const struct sk_buff *skb,
struct ipv6_opt_hdr _optsh, *oh;
const struct ip6t_opts *optinfo = matchinfo;
unsigned int temp;
- unsigned int len;
- u8 nexthdr;
unsigned int ptr;
unsigned int hdrlen = 0;
unsigned int ret = 0;
@@ -72,97 +70,25 @@ match(const struct sk_buff *skb,
u8 _optlen, *lp = NULL;
unsigned int optlen;
- /* type of the 1st exthdr */
- nexthdr = skb->nh.ipv6h->nexthdr;
- /* pointer to the 1st exthdr */
- ptr = sizeof(struct ipv6hdr);
- /* available length */
- len = skb->len - ptr;
- temp = 0;
-
- while (ip6t_ext_hdr(nexthdr)) {
- struct ipv6_opt_hdr _hdr, *hp;
-
- DEBUGP("ipv6_opts header iteration \n");
-
- /* Is there enough space for the next ext header? */
- if (len < (int)sizeof(struct ipv6_opt_hdr))
- return 0;
- /* No more exthdr -> evaluate */
- if (nexthdr == NEXTHDR_NONE) {
- break;
- }
- /* ESP -> evaluate */
- if (nexthdr == NEXTHDR_ESP) {
- break;
- }
-
- hp = skb_header_pointer(skb, ptr, sizeof(_hdr), &_hdr);
- BUG_ON(hp == NULL);
-
- /* Calculate the header length */
- if (nexthdr == NEXTHDR_FRAGMENT) {
- hdrlen = 8;
- } else if (nexthdr == NEXTHDR_AUTH)
- hdrlen = (hp->hdrlen+2)<<2;
- else
- hdrlen = ipv6_optlen(hp);
-
- /* OPTS -> evaluate */
#if HOPBYHOP
- if (nexthdr == NEXTHDR_HOP) {
- temp |= MASK_HOPOPTS;
+ if (ipv6_find_hdr(skb, &ptr, NEXTHDR_HOP) < 0)
#else
- if (nexthdr == NEXTHDR_DEST) {
- temp |= MASK_DSTOPTS;
+ if (ipv6_find_hdr(skb, &ptr, NEXTHDR_DEST) < 0)
#endif
- break;
- }
-
+ return 0;
- /* set the flag */
- switch (nexthdr){
- case NEXTHDR_HOP:
- case NEXTHDR_ROUTING:
- case NEXTHDR_FRAGMENT:
- case NEXTHDR_AUTH:
- case NEXTHDR_DEST:
- break;
- default:
- DEBUGP("ipv6_opts match: unknown nextheader %u\n",nexthdr);
- return 0;
- break;
- }
-
- nexthdr = hp->nexthdr;
- len -= hdrlen;
- ptr += hdrlen;
- if ( ptr > skb->len ) {
- DEBUGP("ipv6_opts: new pointer is too large! \n");
- break;
- }
- }
-
- /* OPTIONS header not found */
-#if HOPBYHOP
- if ( temp != MASK_HOPOPTS ) return 0;
-#else
- if ( temp != MASK_DSTOPTS ) return 0;
-#endif
-
- if (len < (int)sizeof(struct ipv6_opt_hdr)){
+ oh = skb_header_pointer(skb, ptr, sizeof(_optsh), &_optsh);
+ if (oh == NULL){
*hotdrop = 1;
return 0;
}
- if (len < hdrlen){
+ hdrlen = ipv6_optlen(oh);
+ if (skb->len - ptr < hdrlen){
/* Packet smaller than it's length field */
return 0;
}
- oh = skb_header_pointer(skb, ptr, sizeof(_optsh), &_optsh);
- BUG_ON(oh == NULL);
-
DEBUGP("IPv6 OPTS LEN %u %u ", hdrlen, oh->hdrlen);
DEBUGP("len %02X %04X %02X ",
diff --git a/net/ipv6/netfilter/ip6t_rt.c b/net/ipv6/netfilter/ip6t_rt.c
index 2bb6700..beb2fd5 100644
--- a/net/ipv6/netfilter/ip6t_rt.c
+++ b/net/ipv6/netfilter/ip6t_rt.c
@@ -50,98 +50,29 @@ match(const struct sk_buff *skb,
unsigned int protoff,
int *hotdrop)
{
- struct ipv6_rt_hdr _route, *rh = NULL;
+ struct ipv6_rt_hdr _route, *rh;
const struct ip6t_rt *rtinfo = matchinfo;
unsigned int temp;
- unsigned int len;
- u8 nexthdr;
unsigned int ptr;
unsigned int hdrlen = 0;
unsigned int ret = 0;
struct in6_addr *ap, _addr;
- /* type of the 1st exthdr */
- nexthdr = skb->nh.ipv6h->nexthdr;
- /* pointer to the 1st exthdr */
- ptr = sizeof(struct ipv6hdr);
- /* available length */
- len = skb->len - ptr;
- temp = 0;
+ if (ipv6_find_hdr(skb, &ptr, NEXTHDR_ROUTING) < 0)
+ return 0;
- while (ip6t_ext_hdr(nexthdr)) {
- struct ipv6_opt_hdr _hdr, *hp;
-
- DEBUGP("ipv6_rt header iteration \n");
-
- /* Is there enough space for the next ext header? */
- if (len < (int)sizeof(struct ipv6_opt_hdr))
- return 0;
- /* No more exthdr -> evaluate */
- if (nexthdr == NEXTHDR_NONE) {
- break;
- }
- /* ESP -> evaluate */
- if (nexthdr == NEXTHDR_ESP) {
- break;
- }
-
- hp = skb_header_pointer(skb, ptr, sizeof(_hdr), &_hdr);
- BUG_ON(hp == NULL);
-
- /* Calculate the header length */
- if (nexthdr == NEXTHDR_FRAGMENT) {
- hdrlen = 8;
- } else if (nexthdr == NEXTHDR_AUTH)
- hdrlen = (hp->hdrlen+2)<<2;
- else
- hdrlen = ipv6_optlen(hp);
-
- /* ROUTING -> evaluate */
- if (nexthdr == NEXTHDR_ROUTING) {
- temp |= MASK_ROUTING;
- break;
- }
-
-
- /* set the flag */
- switch (nexthdr){
- case NEXTHDR_HOP:
- case NEXTHDR_ROUTING:
- case NEXTHDR_FRAGMENT:
- case NEXTHDR_AUTH:
- case NEXTHDR_DEST:
- break;
- default:
- DEBUGP("ipv6_rt match: unknown nextheader %u\n",nexthdr);
- return 0;
- break;
- }
-
- nexthdr = hp->nexthdr;
- len -= hdrlen;
- ptr += hdrlen;
- if ( ptr > skb->len ) {
- DEBUGP("ipv6_rt: new pointer is too large! \n");
- break;
- }
- }
-
- /* ROUTING header not found */
- if ( temp != MASK_ROUTING ) return 0;
-
- if (len < (int)sizeof(struct ipv6_rt_hdr)){
+ rh = skb_header_pointer(skb, ptr, sizeof(_route), &_route);
+ if (rh == NULL){
*hotdrop = 1;
return 0;
}
- if (len < hdrlen){
+ hdrlen = ipv6_optlen(rh);
+ if (skb->len - ptr < hdrlen){
/* Pcket smaller than its length field */
return 0;
}
- rh = skb_header_pointer(skb, ptr, sizeof(_route), &_route);
- BUG_ON(rh == NULL);
-
DEBUGP("IPv6 RT LEN %u %u ", hdrlen, rh->hdrlen);
DEBUGP("TYPE %04X ", rh->type);
DEBUGP("SGS_LEFT %u %02X\n", rh->segments_left, rh->segments_left);
diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index 5aa3691..a1265a3 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -627,7 +627,7 @@ static void rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
if (type && code) {
get_user(fl->fl_icmp_type, type);
- __get_user(fl->fl_icmp_code, code);
+ get_user(fl->fl_icmp_code, code);
probed = 1;
}
break;
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 69b1468..6001948 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -405,9 +405,8 @@ static struct sock *udp_v6_mcast_next(struct sock *sk,
continue;
if (!ipv6_addr_any(&np->rcv_saddr)) {
- if (ipv6_addr_equal(&np->rcv_saddr, loc_addr))
- return s;
- continue;
+ if (!ipv6_addr_equal(&np->rcv_saddr, loc_addr))
+ continue;
}
if(!inet6_mc_check(s, loc_addr, rmt_addr))
continue;
@@ -640,6 +639,7 @@ static int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk,
int tclass = -1;
int corkreq = up->corkflag || msg->msg_flags&MSG_MORE;
int err;
+ int connected = 0;
/* destination address check */
if (sin6) {
@@ -749,6 +749,7 @@ do_udp_sendmsg:
fl->fl_ip_dport = inet->dport;
daddr = &np->daddr;
fl->fl6_flowlabel = np->flow_label;
+ connected = 1;
}
if (!fl->oif)
@@ -771,6 +772,7 @@ do_udp_sendmsg:
}
if (!(opt->opt_nflen|opt->opt_flen))
opt = NULL;
+ connected = 0;
}
if (opt == NULL)
opt = np->opt;
@@ -788,10 +790,13 @@ do_udp_sendmsg:
ipv6_addr_copy(&final, &fl->fl6_dst);
ipv6_addr_copy(&fl->fl6_dst, rt0->addr);
final_p = &final;
+ connected = 0;
}
- if (!fl->oif && ipv6_addr_is_multicast(&fl->fl6_dst))
+ if (!fl->oif && ipv6_addr_is_multicast(&fl->fl6_dst)) {
fl->oif = np->mcast_oif;
+ connected = 0;
+ }
err = ip6_dst_lookup(sk, &dst, fl);
if (err)
@@ -847,7 +852,7 @@ do_append_data:
else if (!corkreq)
err = udp_v6_push_pending_frames(sk, up);
- if (dst)
+ if (dst && connected)
ip6_dst_store(sk, dst,
ipv6_addr_equal(&fl->fl6_dst, &np->daddr) ?
&np->daddr : NULL);
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index 8690f17..ee865d8 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -36,6 +36,11 @@
* Michal Ostrowski : Module initialization cleanup.
* Ulises Alonso : Frame number limit removal and
* packet_set_ring memory leak.
+ * Eric Biederman : Allow for > 8 byte hardware addresses.
+ * The convention is that longer addresses
+ * will simply extend the hardware address
+ * byte arrays at the end of sockaddr_ll
+ * and packet_mreq.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
@@ -161,7 +166,17 @@ struct packet_mclist
int count;
unsigned short type;
unsigned short alen;
- unsigned char addr[8];
+ unsigned char addr[MAX_ADDR_LEN];
+};
+/* identical to struct packet_mreq except it has
+ * a longer address field.
+ */
+struct packet_mreq_max
+{
+ int mr_ifindex;
+ unsigned short mr_type;
+ unsigned short mr_alen;
+ unsigned char mr_address[MAX_ADDR_LEN];
};
#endif
#ifdef CONFIG_PACKET_MMAP
@@ -716,6 +731,8 @@ static int packet_sendmsg(struct kiocb *iocb, struct socket *sock,
err = -EINVAL;
if (msg->msg_namelen < sizeof(struct sockaddr_ll))
goto out;
+ if (msg->msg_namelen < (saddr->sll_halen + offsetof(struct sockaddr_ll, sll_addr)))
+ goto out;
ifindex = saddr->sll_ifindex;
proto = saddr->sll_protocol;
addr = saddr->sll_addr;
@@ -744,6 +761,12 @@ static int packet_sendmsg(struct kiocb *iocb, struct socket *sock,
if (dev->hard_header) {
int res;
err = -EINVAL;
+ if (saddr) {
+ if (saddr->sll_halen != dev->addr_len)
+ goto out_free;
+ if (saddr->sll_hatype != dev->type)
+ goto out_free;
+ }
res = dev->hard_header(skb, dev, ntohs(proto), addr, NULL, len);
if (sock->type != SOCK_DGRAM) {
skb->tail = skb->data;
@@ -1045,6 +1068,7 @@ static int packet_recvmsg(struct kiocb *iocb, struct socket *sock,
struct sock *sk = sock->sk;
struct sk_buff *skb;
int copied, err;
+ struct sockaddr_ll *sll;
err = -EINVAL;
if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
@@ -1057,16 +1081,6 @@ static int packet_recvmsg(struct kiocb *iocb, struct socket *sock,
#endif
/*
- * If the address length field is there to be filled in, we fill
- * it in now.
- */
-
- if (sock->type == SOCK_PACKET)
- msg->msg_namelen = sizeof(struct sockaddr_pkt);
- else
- msg->msg_namelen = sizeof(struct sockaddr_ll);
-
- /*
* Call the generic datagram receiver. This handles all sorts
* of horrible races and re-entrancy so we can forget about it
* in the protocol layers.
@@ -1087,6 +1101,17 @@ static int packet_recvmsg(struct kiocb *iocb, struct socket *sock,
goto out;
/*
+ * If the address length field is there to be filled in, we fill
+ * it in now.
+ */
+
+ sll = (struct sockaddr_ll*)skb->cb;
+ if (sock->type == SOCK_PACKET)
+ msg->msg_namelen = sizeof(struct sockaddr_pkt);
+ else
+ msg->msg_namelen = sll->sll_halen + offsetof(struct sockaddr_ll, sll_addr);
+
+ /*
* You lose any data beyond the buffer you gave. If it worries a
* user program they can ask the device for its MTU anyway.
*/
@@ -1166,7 +1191,7 @@ static int packet_getname(struct socket *sock, struct sockaddr *uaddr,
sll->sll_hatype = 0; /* Bad: we have no ARPHRD_UNSPEC */
sll->sll_halen = 0;
}
- *uaddr_len = sizeof(*sll);
+ *uaddr_len = offsetof(struct sockaddr_ll, sll_addr) + sll->sll_halen;
return 0;
}
@@ -1199,7 +1224,7 @@ static void packet_dev_mclist(struct net_device *dev, struct packet_mclist *i, i
}
}
-static int packet_mc_add(struct sock *sk, struct packet_mreq *mreq)
+static int packet_mc_add(struct sock *sk, struct packet_mreq_max *mreq)
{
struct packet_sock *po = pkt_sk(sk);
struct packet_mclist *ml, *i;
@@ -1249,7 +1274,7 @@ done:
return err;
}
-static int packet_mc_drop(struct sock *sk, struct packet_mreq *mreq)
+static int packet_mc_drop(struct sock *sk, struct packet_mreq_max *mreq)
{
struct packet_mclist *ml, **mlp;
@@ -1315,11 +1340,17 @@ packet_setsockopt(struct socket *sock, int level, int optname, char __user *optv
case PACKET_ADD_MEMBERSHIP:
case PACKET_DROP_MEMBERSHIP:
{
- struct packet_mreq mreq;
- if (optlen<sizeof(mreq))
+ struct packet_mreq_max mreq;
+ int len = optlen;
+ memset(&mreq, 0, sizeof(mreq));
+ if (len < sizeof(struct packet_mreq))
return -EINVAL;
- if (copy_from_user(&mreq,optval,sizeof(mreq)))
+ if (len > sizeof(mreq))
+ len = sizeof(mreq);
+ if (copy_from_user(&mreq,optval,len))
return -EFAULT;
+ if (len < (mreq.mr_alen + offsetof(struct packet_mreq, mr_address)))
+ return -EINVAL;
if (optname == PACKET_ADD_MEMBERSHIP)
ret = packet_mc_add(sk, &mreq);
else
diff --git a/net/socket.c b/net/socket.c
index c699e93..f926447 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -1862,7 +1862,8 @@ asmlinkage long sys_recvmsg(int fd, struct msghdr __user *msg, unsigned int flag
if (err < 0)
goto out_freeiov;
}
- err = __put_user(msg_sys.msg_flags, COMPAT_FLAGS(msg));
+ err = __put_user((msg_sys.msg_flags & ~MSG_CMSG_COMPAT),
+ COMPAT_FLAGS(msg));
if (err)
goto out_freeiov;
if (MSG_CMSG_COMPAT & flags)
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