introduce the new expectation API

1 files changed, 53 insertions, 0 deletions

diff --git a/src/expect/callback.c b/src/expect/callback.c
new file mode 100644
index 0000000..df4ffe7
--- /dev/null
+++ b/src/expect/callback.c
@@ -0,0 +1,53 @@
+/*
+ * (C) 2006-2007 by Pablo Neira Ayuso <pablo@netfilter.org>
+ *
+ * This software may be used and distributed according to the terms
+ * of the GNU General Public License, incorporated herein by reference.
+ */
+
+#include "internal.h"
+
+int __expect_callback(struct nlmsghdr *nlh, struct nfattr *nfa[], void *data)
+{
+	int ret = NFNL_CB_STOP;
+	unsigned int type;
+	struct nf_expect *exp;
+	int len = nlh->nlmsg_len;
+	struct __data_container *container = data;
+
+	len -= NLMSG_LENGTH(sizeof(struct nfgenmsg));
+	if (len < 0)
+		return NFNL_CB_CONTINUE;
+
+	type = __parse_message_type(nlh);
+	if (!(type & container->type))
+		return NFNL_CB_CONTINUE;
+
+	exp = nfexp_new();
+	if (!exp)
+		return NFNL_CB_CONTINUE;
+
+	__parse_expect(nlh, nfa, exp);
+
+	if (container->h->expect_cb)
+		ret = container->h->expect_cb(type, exp, container->data);
+
+	switch(ret) {
+	case NFCT_CB_FAILURE:
+		free(exp);
+		ret = NFNL_CB_FAILURE;
+		break;
+	case NFCT_CB_STOP:
+		free(exp);
+		ret = NFNL_CB_STOP;
+		break;
+	case NFCT_CB_CONTINUE:
+		free(exp);
+		ret = NFNL_CB_CONTINUE;
+		break;
+	case NFCT_CB_STOLEN:
+		ret = NFNL_CB_CONTINUE;
+		break;
+	}
+	return ret;
+}