diff options
author | Pablo Neira Ayuso <pablo@netfilter.org> | 2006-01-05 12:19:05 -0800 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2006-01-05 12:19:05 -0800 |
commit | c1d10adb4a521de5760112853f42aaeefcec96eb (patch) | |
tree | c7ba283aa0b9016c8403fa6589b7b3418f71acda /net/ipv4/netfilter/nf_conntrack_proto_icmp.c | |
parent | 205d67c7d942c057648148fefb17e46f77e3efd6 (diff) | |
download | op-kernel-dev-c1d10adb4a521de5760112853f42aaeefcec96eb.zip op-kernel-dev-c1d10adb4a521de5760112853f42aaeefcec96eb.tar.gz |
[NETFILTER]: Add ctnetlink port for nf_conntrack
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/netfilter/nf_conntrack_proto_icmp.c')
-rw-r--r-- | net/ipv4/netfilter/nf_conntrack_proto_icmp.c | 97 |
1 files changed, 79 insertions, 18 deletions
diff --git a/net/ipv4/netfilter/nf_conntrack_proto_icmp.c b/net/ipv4/netfilter/nf_conntrack_proto_icmp.c index 7ddb5c0..52dc175 100644 --- a/net/ipv4/netfilter/nf_conntrack_proto_icmp.c +++ b/net/ipv4/netfilter/nf_conntrack_proto_icmp.c @@ -50,20 +50,21 @@ static int icmp_pkt_to_tuple(const struct sk_buff *skb, return 1; } +/* Add 1; spaces filled with 0. */ +static const u_int8_t invmap[] = { + [ICMP_ECHO] = ICMP_ECHOREPLY + 1, + [ICMP_ECHOREPLY] = ICMP_ECHO + 1, + [ICMP_TIMESTAMP] = ICMP_TIMESTAMPREPLY + 1, + [ICMP_TIMESTAMPREPLY] = ICMP_TIMESTAMP + 1, + [ICMP_INFO_REQUEST] = ICMP_INFO_REPLY + 1, + [ICMP_INFO_REPLY] = ICMP_INFO_REQUEST + 1, + [ICMP_ADDRESS] = ICMP_ADDRESSREPLY + 1, + [ICMP_ADDRESSREPLY] = ICMP_ADDRESS + 1 +}; + static int icmp_invert_tuple(struct nf_conntrack_tuple *tuple, const struct nf_conntrack_tuple *orig) { - /* Add 1; spaces filled with 0. */ - static u_int8_t invmap[] - = { [ICMP_ECHO] = ICMP_ECHOREPLY + 1, - [ICMP_ECHOREPLY] = ICMP_ECHO + 1, - [ICMP_TIMESTAMP] = ICMP_TIMESTAMPREPLY + 1, - [ICMP_TIMESTAMPREPLY] = ICMP_TIMESTAMP + 1, - [ICMP_INFO_REQUEST] = ICMP_INFO_REPLY + 1, - [ICMP_INFO_REPLY] = ICMP_INFO_REQUEST + 1, - [ICMP_ADDRESS] = ICMP_ADDRESSREPLY + 1, - [ICMP_ADDRESSREPLY] = ICMP_ADDRESS + 1}; - if (orig->dst.u.icmp.type >= sizeof(invmap) || !invmap[orig->dst.u.icmp.type]) return 0; @@ -120,11 +121,12 @@ static int icmp_packet(struct nf_conn *ct, static int icmp_new(struct nf_conn *conntrack, const struct sk_buff *skb, unsigned int dataoff) { - static u_int8_t valid_new[] - = { [ICMP_ECHO] = 1, - [ICMP_TIMESTAMP] = 1, - [ICMP_INFO_REQUEST] = 1, - [ICMP_ADDRESS] = 1 }; + static const u_int8_t valid_new[] = { + [ICMP_ECHO] = 1, + [ICMP_TIMESTAMP] = 1, + [ICMP_INFO_REQUEST] = 1, + [ICMP_ADDRESS] = 1 + }; if (conntrack->tuplehash[0].tuple.dst.u.icmp.type >= sizeof(valid_new) || !valid_new[conntrack->tuplehash[0].tuple.dst.u.icmp.type]) { @@ -168,7 +170,7 @@ icmp_error_message(struct sk_buff *skb, return -NF_ACCEPT; } - innerproto = nf_ct_find_proto(PF_INET, inside->ip.protocol); + innerproto = __nf_ct_proto_find(PF_INET, inside->ip.protocol); dataoff = skb->nh.iph->ihl*4 + sizeof(inside->icmp); /* Are they talking about one of our connections? */ if (!nf_ct_get_tuple(skb, dataoff, dataoff + inside->ip.ihl*4, PF_INET, @@ -281,6 +283,60 @@ checksum_skipped: return icmp_error_message(skb, ctinfo, hooknum); } +#if defined(CONFIG_NF_CT_NETLINK) || \ + defined(CONFIG_NF_CT_NETLINK_MODULE) + +#include <linux/netfilter/nfnetlink.h> +#include <linux/netfilter/nfnetlink_conntrack.h> + +static int icmp_tuple_to_nfattr(struct sk_buff *skb, + const struct nf_conntrack_tuple *t) +{ + NFA_PUT(skb, CTA_PROTO_ICMP_ID, sizeof(u_int16_t), + &t->src.u.icmp.id); + NFA_PUT(skb, CTA_PROTO_ICMP_TYPE, sizeof(u_int8_t), + &t->dst.u.icmp.type); + NFA_PUT(skb, CTA_PROTO_ICMP_CODE, sizeof(u_int8_t), + &t->dst.u.icmp.code); + + return 0; + +nfattr_failure: + return -1; +} + +static const size_t cta_min_proto[CTA_PROTO_MAX] = { + [CTA_PROTO_ICMP_TYPE-1] = sizeof(u_int8_t), + [CTA_PROTO_ICMP_CODE-1] = sizeof(u_int8_t), + [CTA_PROTO_ICMP_ID-1] = sizeof(u_int16_t) +}; + +static int icmp_nfattr_to_tuple(struct nfattr *tb[], + struct nf_conntrack_tuple *tuple) +{ + if (!tb[CTA_PROTO_ICMP_TYPE-1] + || !tb[CTA_PROTO_ICMP_CODE-1] + || !tb[CTA_PROTO_ICMP_ID-1]) + return -EINVAL; + + if (nfattr_bad_size(tb, CTA_PROTO_MAX, cta_min_proto)) + return -EINVAL; + + tuple->dst.u.icmp.type = + *(u_int8_t *)NFA_DATA(tb[CTA_PROTO_ICMP_TYPE-1]); + tuple->dst.u.icmp.code = + *(u_int8_t *)NFA_DATA(tb[CTA_PROTO_ICMP_CODE-1]); + tuple->src.u.icmp.id = + *(u_int16_t *)NFA_DATA(tb[CTA_PROTO_ICMP_ID-1]); + + if (tuple->dst.u.icmp.type >= sizeof(invmap) + || !invmap[tuple->dst.u.icmp.type]) + return -EINVAL; + + return 0; +} +#endif + struct nf_conntrack_protocol nf_conntrack_protocol_icmp = { .list = { NULL, NULL }, @@ -295,7 +351,12 @@ struct nf_conntrack_protocol nf_conntrack_protocol_icmp = .new = icmp_new, .error = icmp_error, .destroy = NULL, - .me = NULL + .me = NULL, +#if defined(CONFIG_NF_CT_NETLINK) || \ + defined(CONFIG_NF_CT_NETLINK_MODULE) + .tuple_to_nfattr = icmp_tuple_to_nfattr, + .nfattr_to_tuple = icmp_nfattr_to_tuple, +#endif }; EXPORT_SYMBOL(nf_conntrack_protocol_icmp); |