diff options
Diffstat (limited to 'src/conntrack/build_mnl.c')
| -rw-r--r-- | src/conntrack/build_mnl.c | 106 |
1 files changed, 100 insertions, 6 deletions
diff --git a/src/conntrack/build_mnl.c b/src/conntrack/build_mnl.c index d9ad268..e563c4e 100644 --- a/src/conntrack/build_mnl.c +++ b/src/conntrack/build_mnl.c @@ -73,8 +73,7 @@ nfct_build_tuple_proto(struct nlmsghdr *nlh, const struct __nfct_tuple *t) mnl_attr_put_u16(nlh, CTA_PROTO_ICMPV6_ID, t->l4src.icmp.id); break; default: - mnl_attr_nest_cancel(nlh, nest); - return -1; + break; } mnl_attr_nest_end(nlh, nest); return 0; @@ -496,10 +495,7 @@ nfct_nlmsg_build(struct nlmsghdr *nlh, const struct nf_conntrack *ct) test_bit(ATTR_REPL_PORT_DST, ct->head.set) || test_bit(ATTR_REPL_L3PROTO, ct->head.set) || test_bit(ATTR_REPL_L4PROTO, ct->head.set) || - test_bit(ATTR_REPL_ZONE, ct->head.set) || - test_bit(ATTR_ICMP_TYPE, ct->head.set) || - test_bit(ATTR_ICMP_CODE, ct->head.set) || - test_bit(ATTR_ICMP_ID, ct->head.set)) { + test_bit(ATTR_REPL_ZONE, ct->head.set)) { const struct __nfct_tuple *t = &ct->repl; struct nlattr *nest; @@ -598,3 +594,101 @@ nfct_nlmsg_build(struct nlmsghdr *nlh, const struct nf_conntrack *ct) return 0; } + +static uint32_t get_flags_from_ct(const struct nf_conntrack *ct, int family) +{ + uint32_t tuple_flags = 0; + + if (family == AF_INET) { + if (test_bit(ATTR_ORIG_IPV4_SRC, ct->head.set)) + tuple_flags |= CTA_FILTER_FLAG_CTA_IP_SRC; + if (test_bit(ATTR_ORIG_IPV4_DST, ct->head.set)) + tuple_flags |= CTA_FILTER_FLAG_CTA_IP_DST; + + if (test_bit(ATTR_ICMP_TYPE, ct->head.set)) + tuple_flags |= CTA_FILTER_FLAG_CTA_PROTO_ICMP_TYPE; + if (test_bit(ATTR_ICMP_CODE, ct->head.set)) + tuple_flags |= CTA_FILTER_FLAG_CTA_PROTO_ICMP_CODE; + if (test_bit(ATTR_ICMP_ID, ct->head.set)) + tuple_flags |= CTA_FILTER_FLAG_CTA_PROTO_ICMP_ID; + } else if (family == AF_INET6) { + if (test_bit(ATTR_ORIG_IPV6_SRC, ct->head.set)) + tuple_flags |= CTA_FILTER_FLAG_CTA_IP_SRC; + if (test_bit(ATTR_ORIG_IPV6_DST, ct->head.set)) + tuple_flags |= CTA_FILTER_FLAG_CTA_IP_DST; + + if (test_bit(ATTR_ICMP_TYPE, ct->head.set)) + tuple_flags |= CTA_FILTER_FLAG_CTA_PROTO_ICMPV6_TYPE; + if (test_bit(ATTR_ICMP_CODE, ct->head.set)) + tuple_flags |= CTA_FILTER_FLAG_CTA_PROTO_ICMPV6_CODE; + if (test_bit(ATTR_ICMP_ID, ct->head.set)) + tuple_flags |= CTA_FILTER_FLAG_CTA_PROTO_ICMPV6_ID; + } + + if (test_bit(ATTR_ORIG_ZONE, ct->head.set)) + tuple_flags |= CTA_FILTER_FLAG_CTA_TUPLE_ZONE; + + if (test_bit(ATTR_ORIG_L4PROTO, ct->head.set)) + tuple_flags |= CTA_FILTER_FLAG_CTA_PROTO_NUM; + if (test_bit(ATTR_ORIG_PORT_SRC, ct->head.set)) + tuple_flags |= CTA_FILTER_FLAG_CTA_PROTO_SRC_PORT; + if (test_bit(ATTR_ORIG_PORT_DST, ct->head.set)) + tuple_flags |= CTA_FILTER_FLAG_CTA_PROTO_DST_PORT; + + return tuple_flags; +} + +int nfct_nlmsg_build_filter(struct nlmsghdr *nlh, + const struct nfct_filter_dump *filter_dump) +{ + struct nfgenmsg *nfg; + + if (filter_dump->set & (1 << NFCT_FILTER_DUMP_MARK)) { + mnl_attr_put_u32(nlh, CTA_MARK, htonl(filter_dump->mark.val)); + mnl_attr_put_u32(nlh, CTA_MARK_MASK, htonl(filter_dump->mark.mask)); + } + if (filter_dump->set & (1 << NFCT_FILTER_DUMP_L3NUM)) { + nfg = mnl_nlmsg_get_payload(nlh); + nfg->nfgen_family = filter_dump->l3num; + } + if (filter_dump->set & (1 << NFCT_FILTER_DUMP_STATUS)) { + mnl_attr_put_u32(nlh, CTA_STATUS, htonl(filter_dump->status.val)); + mnl_attr_put_u32(nlh, CTA_STATUS_MASK, + htonl(filter_dump->status.mask)); + } + if (filter_dump->set & (1 << NFCT_FILTER_DUMP_ZONE)) { + mnl_attr_put_u16(nlh, CTA_ZONE, htons(filter_dump->zone)); + } + if (filter_dump->set & (1 << NFCT_FILTER_DUMP_TUPLE)) { + const struct nf_conntrack *ct = &filter_dump->ct; + struct nlattr *nest; + int ret; + + ret = nfct_nlmsg_build(nlh, ct); + if (ret == -1) + return -1; + + nest = mnl_attr_nest_start(nlh, CTA_FILTER); + if (nest == NULL) + return -1; + + nfg = mnl_nlmsg_get_payload(nlh); + + if (test_bit(ATTR_ORIG_L3PROTO, ct->head.set)) { + if (filter_dump->set & (1 << NFCT_FILTER_DUMP_L3NUM) && + filter_dump->l3num != ct->head.orig.l3protonum) { + errno = EINVAL; + return -1; + } + + nfg->nfgen_family = ct->head.orig.l3protonum; + } + + mnl_attr_put_u32(nlh, CTA_FILTER_ORIG_FLAGS, + get_flags_from_ct(&filter_dump->ct, + nfg->nfgen_family)); + mnl_attr_put_u32(nlh, CTA_FILTER_REPLY_FLAGS, 0); + mnl_attr_nest_end(nlh, nest); + } + return 0; +} |