X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=netlink.c;h=7add6d7dc1638800a45aa180b9e758ac3938a1bd;hb=4a6ee8b677fd7addc97fc0d245f95ddde3b5f8e4;hp=75763cf520719fc1bfc2934da725344121c35aa0;hpb=b4ececfc649ba051ccffe1029637f7262a59d8a0;p=secnet.git

diff --git a/netlink.c b/netlink.c
index 75763cf..7add6d7 100644
--- a/netlink.c
+++ b/netlink.c
@@ -1,5 +1,24 @@
 /* User-kernel network link */
 
+/*
+ * This file is part of secnet.
+ * See README for full list of copyright holders.
+ *
+ * secnet 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 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * secnet 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
+ * version 3 along with secnet; if not, see
+ * https://www.gnu.org/licenses/gpl.html.
+ */
+
 /* See RFCs 791, 792, 1123 and 1812 */
 
 /* The netlink device is actually a router.  Tunnels are unnumbered
@@ -468,8 +487,8 @@ static bool_t netlink_check(struct netlink *st, struct buffer_if *buf,
     struct iphdr *iph=(struct iphdr *)buf->start;
     int32_t len;
 
-    if (iph->ihl < 5) BAD("ihl %u",iph->ihl);
     if (iph->version != 4) BAD("version %u",iph->version);
+    if (iph->ihl < 5) BAD("ihl %u",iph->ihl);
     if (buf->size < iph->ihl*4) BAD("size %"PRId32"<%u*4",buf->size,iph->ihl);
     if (ip_fast_csum((uint8_t *)iph, iph->ihl)!=0) BAD("csum");
     len=ntohs(iph->tot_len);