1 files changed, 70 insertions, 0 deletions
diff --git a/src/origin.c b/src/origin.c
new file mode 100644
index 0000000..3c65f3d
--- /dev/null
+++ b/src/origin.c
@@ -0,0 +1,70 @@
+/*
+ * (C) 2009 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 program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#include "conntrackd.h"
+#include "origin.h"
+
+static LIST_HEAD(origin_list);
+
+struct origin {
+	struct list_head	head;
+	unsigned int		nl_portid;
+	int			type;
+};
+
+/* register a Netlink socket as origin of possible events */
+int origin_register(struct nfct_handle *h, int origin_type)
+{
+	struct origin *nlp;
+
+	nlp = calloc(sizeof(struct origin), 1);
+	if (nlp == NULL)
+		return -1;
+
+	nlp->nl_portid = nfnl_portid(nfct_nfnlh(h));
+	nlp->type = origin_type;
+
+	list_add(&nlp->head, &origin_list);
+	return 0;
+}
+
+/* look up for the origin of this Netlink event */
+int origin_find(const struct nlmsghdr *nlh)
+{
+	struct origin *this;
+
+	list_for_each_entry(this, &origin_list, head) {
+		if (this->nl_portid == nlh->nlmsg_pid) {
+			return this->type;
+		}
+	}
+	return CTD_ORIGIN_NOT_ME;
+}
+
+int origin_unregister(struct nfct_handle *h)
+{
+	struct origin *this, *tmp;
+
+	list_for_each_entry_safe(this, tmp, &origin_list, head) {
+		if (this->nl_portid == nfnl_portid(nfct_nfnlh(h))) {
+			list_del(&this->head);
+			free(this);
+			return 1;
+		}
+	}
+	return 0;
+}