[netfilter-cvslog] r4157 - trunk/libnfnetlink

[laforge at netfilter.org]

Author: laforge at netfilter.org
Date: 2005-07-27 21:21:54 +0200 (Wed, 27 Jul 2005)
New Revision: 4157

Modified:
   trunk/libnfnetlink/libnfnetlink.c
   trunk/libnfnetlink/libnfnetlink.h
Log:
add nfnl_parse_hdr() function


Modified: trunk/libnfnetlink/libnfnetlink.c
===================================================================
--- trunk/libnfnetlink/libnfnetlink.c	2005-07-26 22:20:00 UTC (rev 4156)
+++ trunk/libnfnetlink/libnfnetlink.c	2005-07-27 19:21:54 UTC (rev 4157)
@@ -186,6 +186,25 @@
 	nfg->res_id = htons(res_id);
 }
 
+struct nfattr *
+nfnl_parse_hdr(struct nfnl_handle *nfnlh, const struct nlmsghdr *nlh,
+		struct nfgenmsg **genmsg)
+{
+	if (nlh->nlmsg_len < NLMSG_LENGTH(sizeof(struct nfgenmsg)))
+		return NULL;
+
+	if (nlh->nlmsg_len == NLMSG_LENGTH(sizeof(struct nfgenmsg))) {
+		if (genmsg)
+			*genmsg = (struct nfgenmsg *)((void *)nlh+sizeof(nlh));
+		return NULL;
+	}
+
+	if (genmsg)
+		*genmsg = (struct nfgenmsg *)((void *)nlh + sizeof(nlh));
+
+	return ((void *)nlh + NLMSG_LENGTH(sizeof(struct nfgenmsg)));
+}
+
 /**
  * nfnl_listen: listen for one or more netlink messages
  *

Modified: trunk/libnfnetlink/libnfnetlink.h
===================================================================
--- trunk/libnfnetlink/libnfnetlink.h	2005-07-26 22:20:00 UTC (rev 4156)
+++ trunk/libnfnetlink/libnfnetlink.h	2005-07-27 19:21:54 UTC (rev 4157)
@@ -38,6 +38,10 @@
 			  unsigned int, u_int8_t, u_int16_t, u_int16_t,
 			  u_int16_t);
 
+extern struct nfattr *nfnl_parse_hdr(struct nfnl_handle *nfnlh, 
+				     const struct nlmsghdr *nlh,
+				     struct nfgenmsg **genmsg);
+
 extern int nfnl_listen(struct nfnl_handle *,
                       int (*)(struct sockaddr_nl *, struct nlmsghdr *, void *),
                       void *);