diff options
Diffstat (limited to 'src/deprecated/l3extensions/libnetfilter_conntrack_ipv6.c')
-rw-r--r-- | src/deprecated/l3extensions/libnetfilter_conntrack_ipv6.c | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/src/deprecated/l3extensions/libnetfilter_conntrack_ipv6.c b/src/deprecated/l3extensions/libnetfilter_conntrack_ipv6.c new file mode 100644 index 0000000..b0c7a3f --- /dev/null +++ b/src/deprecated/l3extensions/libnetfilter_conntrack_ipv6.c @@ -0,0 +1,115 @@ +/* + * (C) 2005 by Pablo Neira Ayuso <pablo@netfilter.org> + * + * 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 <stdio.h> +#include <getopt.h> +#include <stdlib.h> +#include <string.h> +#include <netinet/in.h> /* For htons */ +#include <arpa/inet.h> +#include <libnetfilter_conntrack/linux_nfnetlink_conntrack.h> +#include <libnetfilter_conntrack/libnetfilter_conntrack.h> +#include <libnetfilter_conntrack/libnetfilter_conntrack_l3extensions.h> +#include <libnetfilter_conntrack/libnetfilter_conntrack_ipv6.h> + +#ifndef HAVE_INET_NTOP_IPV6 +#warning "inet_ntop does not support IPv6" +#endif + +static void parse_proto(struct nfattr *cda[], struct nfct_tuple *tuple) +{ + if (cda[CTA_IP_V6_SRC-1]) + memcpy(tuple->src.v6, NFA_DATA(cda[CTA_IP_V6_SRC-1]), + sizeof(u_int32_t)*4); + + if (cda[CTA_IP_V6_DST-1]) + memcpy(tuple->dst.v6, NFA_DATA(cda[CTA_IP_V6_DST-1]), + sizeof(u_int32_t)*4); +} + +static void build_tuple_proto(struct nfnlhdr *req, int size, + struct nfct_tuple *t) +{ + nfnl_addattr_l(&req->nlh, size, CTA_IP_V6_SRC, &t->src.v6, + sizeof(u_int32_t)*4); + nfnl_addattr_l(&req->nlh, size, CTA_IP_V6_DST, &t->dst.v6, + sizeof(u_int32_t)*4); +} + +static int print_proto(char *buf, struct nfct_tuple *tuple) +{ + struct in6_addr src; + struct in6_addr dst; + char tmp[INET6_ADDRSTRLEN]; + int size; + + memcpy(&src.in6_u, tuple->src.v6, sizeof(struct in6_addr)); + memcpy(&dst.in6_u, tuple->dst.v6, sizeof(struct in6_addr)); + + if (!inet_ntop(AF_INET6, &src, tmp, sizeof(tmp))) + return 0; + size = sprintf(buf, "src=%s ", tmp); + if (!inet_ntop(AF_INET6, &dst, tmp, sizeof(tmp))) + return 0; + size += sprintf(buf + size, "dst=%s ", tmp); + + return size; +} + +static int compare(struct nfct_conntrack *ct1, + struct nfct_conntrack *ct2, + unsigned int flags) +{ + if (flags & IPV6_ORIG) + if (ct1->tuple[NFCT_DIR_ORIGINAL].l3protonum != + ct2->tuple[NFCT_DIR_ORIGINAL].l3protonum) + return 0; + if (flags & IPV6_REPL) + if (ct1->tuple[NFCT_DIR_REPLY].l3protonum != + ct2->tuple[NFCT_DIR_REPLY].l3protonum) + return 0; + if (flags & IPV6_ORIG_SRC) + if (memcmp(ct1->tuple[NFCT_DIR_ORIGINAL].src.v6, + ct2->tuple[NFCT_DIR_ORIGINAL].src.v6, + sizeof(u_int32_t)*4) == 0) + return 0; + if (flags & IPV6_ORIG_DST) + if (memcmp(ct1->tuple[NFCT_DIR_ORIGINAL].dst.v6, + ct2->tuple[NFCT_DIR_ORIGINAL].dst.v6, + sizeof(u_int32_t)*4) == 0) + return 0; + if (flags & IPV6_REPL_SRC) + if (memcmp(ct1->tuple[NFCT_DIR_REPLY].src.v6, + ct2->tuple[NFCT_DIR_REPLY].src.v6, + sizeof(u_int32_t)*4) == 0) + return 0; + if (flags & IPV6_REPL_DST) + if (memcmp(ct1->tuple[NFCT_DIR_REPLY].dst.v6, + ct2->tuple[NFCT_DIR_REPLY].dst.v6, + sizeof(u_int32_t)*4) == 0) + return 0; + + return 1; +} + +static struct nfct_l3proto ipv6 = { + .name = "ipv6", + .protonum = AF_INET6, + .parse_proto = parse_proto, + .build_tuple_proto = build_tuple_proto, + .print_proto = print_proto, + .compare = compare, + .version = VERSION +}; + +static void __attribute__ ((constructor)) init(void); + +static void init(void) +{ + nfct_register_l3proto(&ipv6); +} |