From cdc8744396470397dcbb9b50dc197526c4cb834c Mon Sep 17 00:00:00 2001 From: "/C=EU/ST=EU/CN=Pablo Neira Ayuso/emailAddress=pablo@netfilter.org" Date: Sun, 13 Jan 2008 17:17:11 +0000 Subject: Several tree reorganizations: - move l3extensions/ and extensions/ to src/deprecated/ - don't create submodules under /usr/lib/libnetfilter_conntrack/ anymore --- extensions/libnetfilter_conntrack_tcp.c | 142 -------------------------------- 1 file changed, 142 deletions(-) delete mode 100644 extensions/libnetfilter_conntrack_tcp.c (limited to 'extensions/libnetfilter_conntrack_tcp.c') diff --git a/extensions/libnetfilter_conntrack_tcp.c b/extensions/libnetfilter_conntrack_tcp.c deleted file mode 100644 index 9efdbb7..0000000 --- a/extensions/libnetfilter_conntrack_tcp.c +++ /dev/null @@ -1,142 +0,0 @@ -/* - * (C) 2005 by Pablo Neira Ayuso - * - * 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; either version 2 of the License, or - * (at your option) any later version. - * - */ -#include -#include -#include -#include -#include /* For htons */ -#include -#include -#include -#include - -static const char *states[] = { - "NONE", - "SYN_SENT", - "SYN_RECV", - "ESTABLISHED", - "FIN_WAIT", - "CLOSE_WAIT", - "LAST_ACK", - "TIME_WAIT", - "CLOSE", - "LISTEN" -}; - -static void parse_proto(struct nfattr *cda[], struct nfct_tuple *tuple) -{ - if (cda[CTA_PROTO_SRC_PORT-1]) - tuple->l4src.tcp.port = - *(u_int16_t *)NFA_DATA(cda[CTA_PROTO_SRC_PORT-1]); - if (cda[CTA_PROTO_DST_PORT-1]) - tuple->l4dst.tcp.port = - *(u_int16_t *)NFA_DATA(cda[CTA_PROTO_DST_PORT-1]); -} - -static void parse_protoinfo(struct nfattr *cda[], struct nfct_conntrack *ct) -{ - struct nfattr *tb[CTA_PROTOINFO_TCP_MAX]; - - /* - * Listen to me carefully: This is easy to trigger with events ;). - * The conntrack event messages don't always contain all the - * information about a conntrack, just those fields that have changed. - * So you can receive a message about a TCP connection with no bits - * talking about the private protocol information. - * - * --pablo 05/10/31 - */ - if (!cda[CTA_PROTOINFO_TCP-1]) - return; - - nfnl_parse_nested(tb,CTA_PROTOINFO_TCP_MAX, cda[CTA_PROTOINFO_TCP-1]); - - if (tb[CTA_PROTOINFO_TCP_STATE-1]) - ct->protoinfo.tcp.state = - *(u_int8_t *)NFA_DATA(tb[CTA_PROTOINFO_TCP_STATE-1]); -} - -static void build_tuple_proto(struct nfnlhdr *req, int size, - struct nfct_tuple *t) -{ - nfnl_addattr_l(&req->nlh, size, CTA_PROTO_SRC_PORT, - &t->l4src.tcp.port, sizeof(u_int16_t)); - nfnl_addattr_l(&req->nlh, size, CTA_PROTO_DST_PORT, - &t->l4dst.tcp.port, sizeof(u_int16_t)); -} - -static void build_protoinfo(struct nfnlhdr *req, int size, - struct nfct_conntrack *ct) -{ - struct nfattr *nest_proto; - - nest_proto = nfnl_nest(&req->nlh, size, CTA_PROTOINFO_TCP); - nfnl_addattr_l(&req->nlh, size, CTA_PROTOINFO_TCP_STATE, - &ct->protoinfo.tcp.state, sizeof(u_int8_t)); - nfnl_nest_end(&req->nlh, nest_proto); -} - -static int print_protoinfo(char *buf, union nfct_protoinfo *protoinfo) -{ - return(sprintf(buf, "%s ", states[protoinfo->tcp.state])); -} - -static int print_proto(char *buf, struct nfct_tuple *tuple) -{ - return(sprintf(buf, "sport=%u dport=%u ", htons(tuple->l4src.tcp.port), - htons(tuple->l4dst.tcp.port))); -} - -static int compare(struct nfct_conntrack *ct1, - struct nfct_conntrack *ct2, - unsigned int flags) -{ - if (flags & TCP_ORIG_SPORT) - if (ct1->tuple[NFCT_DIR_ORIGINAL].l4src.tcp.port != - ct2->tuple[NFCT_DIR_ORIGINAL].l4src.tcp.port) - return 0; - if (flags & TCP_ORIG_DPORT) - if (ct1->tuple[NFCT_DIR_ORIGINAL].l4dst.tcp.port != - ct2->tuple[NFCT_DIR_ORIGINAL].l4dst.tcp.port) - return 0; - if (flags & TCP_REPL_SPORT) - if (ct1->tuple[NFCT_DIR_REPLY].l4src.tcp.port != - ct2->tuple[NFCT_DIR_REPLY].l4src.tcp.port) - return 0; - if (flags & TCP_REPL_DPORT) - if (ct1->tuple[NFCT_DIR_REPLY].l4dst.tcp.port != - ct2->tuple[NFCT_DIR_REPLY].l4dst.tcp.port) - return 0; - if (flags & TCP_STATE) - if (ct1->protoinfo.tcp.state != ct2->protoinfo.tcp.state) - return 0; - - return 1; -} - -static struct nfct_proto tcp = { - .name = "tcp", - .protonum = IPPROTO_TCP, - .parse_protoinfo = parse_protoinfo, - .parse_proto = parse_proto, - .build_tuple_proto = build_tuple_proto, - .build_protoinfo = build_protoinfo, - .print_protoinfo = print_protoinfo, - .print_proto = print_proto, - .compare = compare, - .version = VERSION -}; - -static void __attribute__ ((constructor)) init(void); - -static void init(void) -{ - nfct_register_proto(&tcp); -} -- cgit v1.2.3