expect: add new cthelper_* functions for SIP helper

This patch adds new functions to support the SIP helper in
user-space.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 64 insertions, 0 deletions

diff --git a/expect.c b/expect.c
index fc46a21..072e913 100644
--- a/expect.c
+++ b/expect.c
@@ -171,6 +171,11 @@ int cthelper_del_expect(struct nf_expect *exp)
 	return 0;
 }
 
+int cthelper_upd_expect(struct nf_expect *exp)
+{
+	return 0;
+}
+
 int cthelper_upd_ct(struct nf_conntrack *ct)
 {
        return 0;
@@ -203,3 +208,62 @@ cthelper_get_addr_dst(struct nf_conntrack *ct, int dir,
 		break;
 	}
 }
+
+int cthelper_cmp_addr_src(struct nf_conntrack *ct, int dir,
+			  union nfct_attr_grp_addr *addr)
+{
+	union nfct_attr_grp_addr tmp;
+
+	switch (dir) {
+	case MYCT_DIR_ORIG:
+		nfct_get_attr_grp(ct, ATTR_GRP_ORIG_ADDR_SRC, &tmp);
+		break;
+	case MYCT_DIR_REPL:
+		nfct_get_attr_grp(ct, ATTR_GRP_REPL_ADDR_SRC, &tmp);
+		break;
+	}
+	return memcmp(addr, &tmp, sizeof(union nfct_attr_grp_addr)) == 0;
+}
+
+int cthelper_cmp_addr_dst(struct nf_conntrack *ct, int dir,
+			  union nfct_attr_grp_addr *addr)
+{
+	union nfct_attr_grp_addr tmp;
+
+	switch (dir) {
+	case MYCT_DIR_ORIG:
+		nfct_get_attr_grp(ct, ATTR_GRP_ORIG_ADDR_DST, &tmp);
+		break;
+	case MYCT_DIR_REPL:
+		nfct_get_attr_grp(ct, ATTR_GRP_REPL_ADDR_DST, &tmp);
+		break;
+	}
+	return memcmp(addr, &tmp, sizeof(union nfct_attr_grp_addr)) == 0;
+}
+
+int cthelper_cmp_exp_addr_dst(struct nf_expect *exp,
+			      union nfct_attr_grp_addr *addr)
+{
+	const struct nf_conntrack *tuple = nfexp_get_attr(exp, ATTR_EXP_EXPECTED);
+	union nfct_attr_grp_addr tmp;
+
+	cthelper_get_addr_dst((struct nf_conntrack *)tuple, MYCT_DIR_ORIG, &tmp);
+
+	return memcmp(addr, &tmp, sizeof(union nfct_attr_grp_addr)) == 0;
+}
+
+int cthelper_iterate_exp(struct nf_conntrack *ct,
+			 int (*cb)(struct nf_expect *exp, void *data),
+			 void *data_cb)
+{
+	return 0;
+}
+
+struct nf_expect *cthelper_find_expect(union nfct_attr_grp_addr *saddr,
+				       union nfct_attr_grp_addr *daddr,
+				       uint16_t sport, uint16_t dport,
+				       uint8_t l3num, uint8_t l4num,
+				       uint16_t zone)
+{
+	return NULL;
+}