Ok, here it is, we finally add SCTP to current. Note that this

work is not just mine, but it is also the works of Peter Lei
and Michael Tuexen. They both are my two key other developers
working on the project.. and they need ata-boy's too:
****
peterlei@cisco.com
tuexen@fh-muenster.de
****
I did do a make sysent which updated the
syscall's and sysproto.. I hope that is correct... without
it you don't build since we have new syscalls for SCTP :-0

So go out and look at the NOTES, add
option SCTP (make sure inet and inet6 are present too)
and play with SCTP.

I will see about comitting some test tools I have after I
figure out where I should place them. I also have a
lib (libsctp.a) that adds some of the missing socketapi
functions that I need to put into lib's.. I will talk
to George about this :-)

There may still be some 64 bit issues in here, none of
us have a 64 bit processor to test with yet.. Michael
may have a MAC but thats another beast too..

If you have a mac and want to use SCTP contact Michael
he maintains a web site with a loadable module with
this code :-)

Reviewed by:	gnn
Approved by:	gnn

1 files changed, 562 insertions, 0 deletions

diff --git a/sys/netinet/sctp_header.h b/sys/netinet/sctp_header.h
new file mode 100644
index 0000000..e5d04af
--- /dev/null
+++ b/sys/netinet/sctp_header.h
@@ -0,0 +1,562 @@
+/*-
+ * Copyright (c) 2001-2006, Cisco Systems, Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * a) Redistributions of source code must retain the above copyright notice,
+ *   this list of conditions and the following disclaimer.
+ *
+ * b) Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *   the documentation and/or other materials provided with the distribution.
+ *
+ * c) Neither the name of Cisco Systems, Inc. nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/* $KAME: sctp_header.h,v 1.14 2005/03/06 16:04:17 itojun Exp $	 */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#ifndef __sctp_header_h__
+#define __sctp_header_h__
+
+
+#include <sys/time.h>
+#include <netinet/sctp.h>
+#include <netinet/sctp_constants.h>
+
+/*
+ * Parameter structures
+ */
+struct sctp_ipv4addr_param {
+	struct sctp_paramhdr ph;/* type=SCTP_IPV4_PARAM_TYPE, len=8 */
+	uint32_t addr;		/* IPV4 address */
+};
+
+struct sctp_ipv6addr_param {
+	struct sctp_paramhdr ph;/* type=SCTP_IPV6_PARAM_TYPE, len=20 */
+	uint8_t addr[16];	/* IPV6 address */
+};
+
+/* Cookie Preservative */
+struct sctp_cookie_perserve_param {
+	struct sctp_paramhdr ph;/* type=SCTP_COOKIE_PRESERVE, len=8 */
+	uint32_t time;		/* time in ms to extend cookie */
+};
+
+/* Host Name Address */
+struct sctp_host_name_param {
+	struct sctp_paramhdr ph;/* type=SCTP_HOSTNAME_ADDRESS */
+	char name[1];		/* host name */
+};
+
+/* supported address type */
+struct sctp_supported_addr_param {
+	struct sctp_paramhdr ph;/* type=SCTP_SUPPORTED_ADDRTYPE */
+	uint16_t addr_type[1];	/* array of supported address types */
+};
+
+/* ECN parameter */
+struct sctp_ecn_supported_param {
+	struct sctp_paramhdr ph;/* type=SCTP_ECN_CAPABLE */
+};
+
+
+/* heartbeat info parameter */
+struct sctp_heartbeat_info_param {
+	struct sctp_paramhdr ph;
+	uint32_t time_value_1;
+	uint32_t time_value_2;
+	uint32_t random_value1;
+	uint32_t random_value2;
+	uint16_t user_req;
+	uint8_t addr_family;
+	uint8_t addr_len;
+	char address[SCTP_ADDRMAX];
+};
+
+
+/* draft-ietf-tsvwg-prsctp */
+/* PR-SCTP supported parameter */
+struct sctp_prsctp_supported_param {
+	struct sctp_paramhdr ph;
+};
+
+
+/* draft-ietf-tsvwg-addip-sctp */
+struct sctp_asconf_paramhdr {	/* an ASCONF "parameter" */
+	struct sctp_paramhdr ph;/* a SCTP parameter header */
+	uint32_t correlation_id;/* correlation id for this param */
+};
+
+struct sctp_asconf_addr_param {	/* an ASCONF address parameter */
+	struct sctp_asconf_paramhdr aph;	/* asconf "parameter" */
+	struct sctp_ipv6addr_param addrp;	/* max storage size */
+};
+
+struct sctp_asconf_addrv4_param {	/* an ASCONF address (v4) parameter */
+	struct sctp_asconf_paramhdr aph;	/* asconf "parameter" */
+	struct sctp_ipv4addr_param addrp;	/* max storage size */
+};
+
+struct sctp_supported_chunk_types_param {
+	struct sctp_paramhdr ph;/* type = 0x8008  len = x */
+	uint8_t chunk_types[0];
+};
+
+
+/* ECN Nonce: draft-ladha-sctp-ecn-nonce */
+struct sctp_ecn_nonce_supported_param {
+	struct sctp_paramhdr ph;/* type = 0x8001  len = 4 */
+};
+
+
+/*
+ * Structures for DATA chunks
+ */
+struct sctp_data {
+	uint32_t tsn;
+	uint16_t stream_id;
+	uint16_t stream_sequence;
+	uint32_t protocol_id;
+	/* user data follows */
+};
+
+struct sctp_data_chunk {
+	struct sctp_chunkhdr ch;
+	struct sctp_data dp;
+};
+
+/*
+ * Structures for the control chunks
+ */
+
+/* Initiate (INIT)/Initiate Ack (INIT ACK) */
+struct sctp_init {
+	uint32_t initiate_tag;	/* initiate tag */
+	uint32_t a_rwnd;	/* a_rwnd */
+	uint16_t num_outbound_streams;	/* OS */
+	uint16_t num_inbound_streams;	/* MIS */
+	uint32_t initial_tsn;	/* I-TSN */
+	/* optional param's follow */
+};
+
+/* state cookie header */
+struct sctp_state_cookie {	/* this is our definition... */
+	uint8_t identification[16];	/* id of who we are */
+	uint32_t cookie_life;	/* life I will award this cookie */
+	uint32_t tie_tag_my_vtag;	/* my tag in old association */
+	uint32_t tie_tag_peer_vtag;	/* peers tag in old association */
+	uint32_t peers_vtag;	/* peers tag in INIT (for quick ref) */
+	uint32_t my_vtag;	/* my tag in INIT-ACK (for quick ref) */
+	struct timeval time_entered;	/* the time I built cookie */
+	uint32_t address[4];	/* 4 ints/128 bits */
+	uint32_t addr_type;	/* address type */
+	uint32_t laddress[4];	/* my local from address */
+	uint32_t laddr_type;	/* my local from address type */
+	uint32_t scope_id;	/* v6 scope id for link-locals */
+	uint16_t peerport;	/* port address of the peer in the INIT */
+	uint16_t myport;	/* my port address used in the INIT */
+	uint8_t ipv4_addr_legal;/* Are V4 addr legal? */
+	uint8_t ipv6_addr_legal;/* Are V6 addr legal? */
+	uint8_t local_scope;	/* IPv6 local scope flag */
+	uint8_t site_scope;	/* IPv6 site scope flag */
+	uint8_t ipv4_scope;	/* IPv4 private addr scope */
+	uint8_t loopback_scope;	/* loopback scope information */
+	uint16_t reserved;
+	/*
+	 * at the end is tacked on the INIT chunk and the INIT-ACK chunk
+	 * (minus the cookie).
+	 */
+};
+
+struct sctp_inv_mandatory_param {
+	uint16_t cause;
+	uint16_t length;
+	uint32_t num_param;
+	uint16_t param;
+	/*
+	 * We include this to 0 it since only a missing cookie will cause
+	 * this error.
+	 */
+	uint16_t resv;
+};
+
+struct sctp_unresolv_addr {
+	uint16_t cause;
+	uint16_t length;
+	uint16_t addr_type;
+	uint16_t reserved;	/* Only one invalid addr type */
+};
+
+/* state cookie parameter */
+struct sctp_state_cookie_param {
+	struct sctp_paramhdr ph;
+	struct sctp_state_cookie cookie;
+};
+
+struct sctp_init_chunk {
+	struct sctp_chunkhdr ch;
+	struct sctp_init init;
+};
+
+struct sctp_init_msg {
+	struct sctphdr sh;
+	struct sctp_init_chunk msg;
+};
+
+/* ... used for both INIT and INIT ACK */
+#define sctp_init_ack		sctp_init
+#define sctp_init_ack_chunk	sctp_init_chunk
+#define sctp_init_ack_msg	sctp_init_msg
+
+
+/* Selective Ack (SACK) */
+struct sctp_gap_ack_block {
+	uint16_t start;		/* Gap Ack block start */
+	uint16_t end;		/* Gap Ack block end */
+};
+
+struct sctp_sack {
+	uint32_t cum_tsn_ack;	/* cumulative TSN Ack */
+	uint32_t a_rwnd;	/* updated a_rwnd of sender */
+	uint16_t num_gap_ack_blks;	/* number of Gap Ack blocks */
+	uint16_t num_dup_tsns;	/* number of duplicate TSNs */
+	/* struct sctp_gap_ack_block's follow */
+	/* uint32_t duplicate_tsn's follow */
+};
+
+struct sctp_sack_chunk {
+	struct sctp_chunkhdr ch;
+	struct sctp_sack sack;
+};
+
+
+/* Heartbeat Request (HEARTBEAT) */
+struct sctp_heartbeat {
+	struct sctp_heartbeat_info_param hb_info;
+};
+
+struct sctp_heartbeat_chunk {
+	struct sctp_chunkhdr ch;
+	struct sctp_heartbeat heartbeat;
+};
+
+/* ... used for Heartbeat Ack (HEARTBEAT ACK) */
+#define sctp_heartbeat_ack		sctp_heartbeat
+#define sctp_heartbeat_ack_chunk	sctp_heartbeat_chunk
+
+
+/* Abort Asssociation (ABORT) */
+struct sctp_abort_chunk {
+	struct sctp_chunkhdr ch;
+	/* optional error cause may follow */
+};
+
+struct sctp_abort_msg {
+	struct sctphdr sh;
+	struct sctp_abort_chunk msg;
+};
+
+
+/* Shutdown Association (SHUTDOWN) */
+struct sctp_shutdown_chunk {
+	struct sctp_chunkhdr ch;
+	uint32_t cumulative_tsn_ack;
+};
+
+
+/* Shutdown Acknowledgment (SHUTDOWN ACK) */
+struct sctp_shutdown_ack_chunk {
+	struct sctp_chunkhdr ch;
+};
+
+
+/* Operation Error (ERROR) */
+struct sctp_error_chunk {
+	struct sctp_chunkhdr ch;
+	/* optional error causes follow */
+};
+
+
+/* Cookie Echo (COOKIE ECHO) */
+struct sctp_cookie_echo_chunk {
+	struct sctp_chunkhdr ch;
+	struct sctp_state_cookie cookie;
+};
+
+/* Cookie Acknowledgment (COOKIE ACK) */
+struct sctp_cookie_ack_chunk {
+	struct sctp_chunkhdr ch;
+};
+
+/* Explicit Congestion Notification Echo (ECNE) */
+struct sctp_ecne_chunk {
+	struct sctp_chunkhdr ch;
+	uint32_t tsn;
+};
+
+/* Congestion Window Reduced (CWR) */
+struct sctp_cwr_chunk {
+	struct sctp_chunkhdr ch;
+	uint32_t tsn;
+};
+
+/* Shutdown Complete (SHUTDOWN COMPLETE) */
+struct sctp_shutdown_complete_chunk {
+	struct sctp_chunkhdr ch;
+};
+
+/* Oper error holding a stale cookie */
+struct sctp_stale_cookie_msg {
+	struct sctp_paramhdr ph;/* really an error cause */
+	uint32_t time_usec;
+};
+
+struct sctp_adaptation_layer_indication {
+	struct sctp_paramhdr ph;
+	uint32_t indication;
+};
+
+struct sctp_cookie_while_shutting_down {
+	struct sctphdr sh;
+	struct sctp_chunkhdr ch;
+	struct sctp_paramhdr ph;/* really an error cause */
+};
+
+struct sctp_shutdown_complete_msg {
+	struct sctphdr sh;
+	struct sctp_shutdown_complete_chunk shut_cmp;
+};
+
+/*
+ * draft-ietf-tsvwg-addip-sctp
+ */
+/* Address/Stream Configuration Change (ASCONF) */
+struct sctp_asconf_chunk {
+	struct sctp_chunkhdr ch;
+	uint32_t serial_number;
+	/* lookup address parameter (mandatory) */
+	/* asconf parameters follow */
+};
+
+/* Address/Stream Configuration Acknowledge (ASCONF ACK) */
+struct sctp_asconf_ack_chunk {
+	struct sctp_chunkhdr ch;
+	uint32_t serial_number;
+	/* asconf parameters follow */
+};
+
+/* draft-ietf-tsvwg-prsctp */
+/* Forward Cumulative TSN (FORWARD TSN) */
+struct sctp_forward_tsn_chunk {
+	struct sctp_chunkhdr ch;
+	uint32_t new_cumulative_tsn;
+	/* stream/sequence pairs (sctp_strseq) follow */
+};
+
+struct sctp_strseq {
+	uint16_t stream;
+	uint16_t sequence;
+};
+
+struct sctp_forward_tsn_msg {
+	struct sctphdr sh;
+	struct sctp_forward_tsn_chunk msg;
+};
+
+/* should be a multiple of 4 - 1 aka 3/7/11 etc. */
+
+#define SCTP_NUM_DB_TO_VERIFY 31
+
+struct sctp_chunk_desc {
+	uint8_t chunk_type;
+	uint8_t data_bytes[SCTP_NUM_DB_TO_VERIFY];
+	uint32_t tsn_ifany;
+};
+
+
+struct sctp_pktdrop_chunk {
+	struct sctp_chunkhdr ch;
+	uint32_t bottle_bw;
+	uint32_t current_onq;
+	uint16_t trunc_len;
+	uint16_t reserved;
+	uint8_t data[0];
+};
+
+/**********STREAM RESET STUFF ******************/
+
+struct sctp_stream_reset_out_request {
+	struct sctp_paramhdr ph;
+	uint32_t request_seq;	/* monotonically increasing seq no */
+	uint32_t response_seq;	/* if a response, the resp seq no */
+	uint32_t send_reset_at_tsn;	/* last TSN I assigned outbound */
+	uint16_t list_of_streams[0];	/* if not all list of streams */
+};
+
+struct sctp_stream_reset_in_request {
+	struct sctp_paramhdr ph;
+	uint32_t request_seq;
+	uint16_t list_of_streams[0];	/* if not all list of streams */
+};
+
+
+struct sctp_stream_reset_tsn_request {
+	struct sctp_paramhdr ph;
+	uint32_t request_seq;
+};
+
+struct sctp_stream_reset_response {
+	struct sctp_paramhdr ph;
+	uint32_t response_seq;	/* if a response, the resp seq no */
+	uint32_t result;
+};
+
+struct sctp_stream_reset_response_tsn {
+	struct sctp_paramhdr ph;
+	uint32_t response_seq;	/* if a response, the resp seq no */
+	uint32_t result;
+	uint32_t senders_next_tsn;
+	uint32_t receivers_next_tsn;
+};
+
+
+
+#define SCTP_STREAM_RESET_NOTHING   0x00000000	/* Nothing for me to do */
+#define SCTP_STREAM_RESET_PERFORMED 0x00000001	/* Did it */
+#define SCTP_STREAM_RESET_DENIED    0x00000002	/* refused to do it */
+#define SCTP_STREAM_RESET_ERROR_STR 0x00000003	/* bad Stream no */
+#define SCTP_STREAM_RESET_TRY_LATER 0x00000004	/* collision, try again */
+#define SCTP_STREAM_RESET_BAD_SEQNO 0x00000005	/* bad str-reset seq no */
+
+/*
+ * convience structures, note that if you are making a request for specific
+ * streams then the request will need to be an overlay structure.
+ */
+
+struct sctp_stream_reset_out_req {
+	struct sctp_chunkhdr ch;
+	struct sctp_stream_reset_out_request sr_req;
+};
+
+struct sctp_stream_reset_in_req {
+	struct sctp_chunkhdr ch;
+	struct sctp_stream_reset_in_request sr_req;
+};
+
+struct sctp_stream_reset_tsn_req {
+	struct sctp_chunkhdr ch;
+	struct sctp_stream_reset_tsn_request sr_req;
+};
+
+struct sctp_stream_reset_resp {
+	struct sctp_chunkhdr ch;
+	struct sctp_stream_reset_response sr_resp;
+};
+
+/* respone only valid with a TSN request */
+struct sctp_stream_reset_resp_tsn {
+	struct sctp_chunkhdr ch;
+	struct sctp_stream_reset_response_tsn sr_resp;
+};
+
+/****************************************************/
+
+/*
+ * Authenticated chunks support draft-ietf-tsvwg-sctp-auth
+ */
+struct sctp_auth_random {
+	struct sctp_paramhdr ph;/* type = 0x8002 */
+	uint8_t random_data[0];
+};
+
+struct sctp_auth_chunk_list {
+	struct sctp_paramhdr ph;/* type = 0x8003 */
+	uint8_t chunk_types[0];
+};
+
+struct sctp_auth_hmac_algo {
+	struct sctp_paramhdr ph;/* type = 0x8004 */
+	uint16_t hmac_ids[0];
+};
+
+struct sctp_auth_chunk {
+	struct sctp_chunkhdr ch;
+	uint16_t shared_key_id;
+	uint16_t hmac_id;
+	uint8_t hmac[0];
+};
+
+struct sctp_auth_invalid_hmac {
+	struct sctp_paramhdr ph;
+	uint16_t hmac_id;
+	uint16_t padding;
+};
+
+/*
+ * we pre-reserve enough room for a ECNE or CWR AND a SACK with no missing
+ * pieces. If ENCE is missing we could have a couple of blocks. This way we
+ * optimize so we MOST likely can bundle a SACK/ECN with the smallest size
+ * data chunk I will split into. We could increase throughput slightly by
+ * taking out these two but the  24-sack/8-CWR i.e. 32 bytes I pre-reserve I
+ * feel is worth it for now.
+ */
+#ifndef SCTP_MAX_OVERHEAD
+#ifdef AF_INET6
+#define SCTP_MAX_OVERHEAD (sizeof(struct sctp_data_chunk) + \
+			   sizeof(struct sctphdr) + \
+			   sizeof(struct sctp_ecne_chunk) + \
+			   sizeof(struct sctp_sack_chunk) + \
+			   sizeof(struct ip6_hdr))
+
+#define SCTP_MED_OVERHEAD (sizeof(struct sctp_data_chunk) + \
+			   sizeof(struct sctphdr) + \
+			   sizeof(struct ip6_hdr))
+
+
+#define SCTP_MIN_OVERHEAD (sizeof(struct ip6_hdr) + \
+			   sizeof(struct sctphdr))
+
+#else
+#define SCTP_MAX_OVERHEAD (sizeof(struct sctp_data_chunk) + \
+			   sizeof(struct sctphdr) + \
+			   sizeof(struct sctp_ecne_chunk) + \
+			   sizeof(struct sctp_sack_chunk) + \
+			   sizeof(struct ip))
+
+#define SCTP_MED_OVERHEAD (sizeof(struct sctp_data_chunk) + \
+			   sizeof(struct sctphdr) + \
+			   sizeof(struct ip))
+
+
+#define SCTP_MIN_OVERHEAD (sizeof(struct ip) + \
+			   sizeof(struct sctphdr))
+
+#endif				/* AF_INET6 */
+#endif				/* !SCTP_MAX_OVERHEAD */
+
+#define SCTP_MED_V4_OVERHEAD (sizeof(struct sctp_data_chunk) + \
+			      sizeof(struct sctphdr) + \
+			      sizeof(struct ip))
+
+#define SCTP_MIN_V4_OVERHEAD (sizeof(struct ip) + \
+			      sizeof(struct sctphdr))
+
+#endif				/* !__sctp_header_h__ */