1 files changed, 104 insertions, 0 deletions
diff --git a/src/expect/parse_mnl.c b/src/expect/parse_mnl.c
new file mode 100644
index 0000000..741b46e
--- /dev/null
+++ b/src/expect/parse_mnl.c
@@ -0,0 +1,104 @@
+/*
+ * (C) 2005-2012 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.
+ *
+ * This code has been sponsored by Vyatta Inc. <http://www.vyatta.com>
+ */
+
+#include "internal/internal.h"
+#include <libmnl/libmnl.h>
+
+static int nlmsg_parse_expection_attr_cb(const struct nlattr *attr, void *data)
+{
+	const struct nlattr **tb = data;
+	int type = mnl_attr_get_type(attr);
+
+	/* skip unsupported attribute in user-space */
+	if (mnl_attr_type_valid(attr, CTA_EXPECT_MAX) < 0)
+		return MNL_CB_OK;
+
+	switch(type) {
+	case CTA_EXPECT_MASTER:
+	case CTA_EXPECT_TUPLE:
+	case CTA_EXPECT_MASK:
+		if (mnl_attr_validate(attr, MNL_TYPE_NESTED) < 0)
+			return MNL_CB_ERROR;
+		break;
+	case CTA_EXPECT_TIMEOUT:
+	case CTA_EXPECT_FLAGS:
+	case CTA_EXPECT_ID:
+		if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
+			return MNL_CB_ERROR;
+		break;
+	case CTA_EXPECT_HELP_NAME:
+		if (mnl_attr_validate(attr, MNL_TYPE_STRING) < 0)
+			return MNL_CB_ERROR;
+		break;
+	case CTA_EXPECT_ZONE:
+		if (mnl_attr_validate(attr, MNL_TYPE_U16) < 0)
+			return MNL_CB_ERROR;
+		break;
+	}
+	tb[type] = attr;
+	return MNL_CB_OK;
+}
+
+int nfexp_nlmsg_parse(const struct nlmsghdr *nlh, struct nf_expect *exp)
+{
+	struct nlattr *tb[CTA_EXPECT_MAX+1] = {};
+	struct nfgenmsg *nfg = mnl_nlmsg_get_payload(nlh);
+
+	mnl_attr_parse(nlh, sizeof(struct nfgenmsg),
+			nlmsg_parse_expection_attr_cb, tb);
+
+	if (tb[CTA_EXPECT_MASTER]) {
+		exp->expected.orig.l3protonum = nfg->nfgen_family;
+		set_bit(ATTR_ORIG_L3PROTO, exp->expected.set);
+
+		nfct_parse_tuple(tb[CTA_EXPECT_MASTER], &exp->master.orig,
+				__DIR_ORIG, exp->master.set);
+		set_bit(ATTR_EXP_MASTER, exp->set);
+	}
+	if (tb[CTA_EXPECT_TUPLE]) {
+		exp->mask.orig.l3protonum = nfg->nfgen_family;
+		set_bit(ATTR_ORIG_L3PROTO, exp->mask.set);
+
+		nfct_parse_tuple(tb[CTA_EXPECT_TUPLE], &exp->expected.orig,
+				  __DIR_ORIG, exp->expected.set);
+		set_bit(ATTR_EXP_EXPECTED, exp->set);
+	}
+	if (tb[CTA_EXPECT_MASK]) {
+		exp->master.orig.l3protonum = nfg->nfgen_family;
+		set_bit(ATTR_ORIG_L3PROTO, exp->master.set);
+
+		nfct_parse_tuple(tb[CTA_EXPECT_MASK], &exp->mask.orig,
+				  __DIR_ORIG, exp->mask.set);
+		set_bit(ATTR_EXP_MASK, exp->set);
+	}
+	if (tb[CTA_EXPECT_TIMEOUT]) {
+		exp->timeout = ntohl(mnl_attr_get_u32(tb[CTA_EXPECT_TIMEOUT]));
+		set_bit(ATTR_EXP_TIMEOUT, exp->set);
+	}
+
+	if (tb[CTA_EXPECT_ZONE]) {
+		exp->zone = ntohs(mnl_attr_get_u16(tb[CTA_EXPECT_ZONE]));
+		set_bit(ATTR_EXP_ZONE, exp->set);
+	}
+
+	if (tb[CTA_EXPECT_FLAGS]) {
+		exp->flags = ntohl(mnl_attr_get_u32(tb[CTA_EXPECT_FLAGS]));
+		set_bit(ATTR_EXP_FLAGS, exp->set);
+	}
+
+	if (tb[CTA_EXPECT_HELP_NAME]) {
+		strncpy(exp->helper_name,
+			mnl_attr_get_str(tb[CTA_EXPECT_HELP_NAME]),
+			NFCT_HELPER_NAME_MAX);
+		set_bit(ATTR_EXP_HELPER_NAME, exp->set);
+	}
+	return 0;
+}