ref: 58a0db935ce609533d121a5158a3a9fc65d03f65
parent: d41ca0d32cac02ee12733b0710d8eae3f34c6a4c
author: cinap_lenrek <[email protected]>
date: Sun Aug 14 19:07:10 EDT 2016
ip/il: dont attept to connect over IPv6, IL only supports IPv4 packets
--- a/sys/src/9/ip/il.c
+++ b/sys/src/9/ip/il.c
@@ -251,6 +251,9 @@
e = Fsstdconnect(c, argv, argc);
if(e != nil)
return e;
+ if(c->ipversion != V4)
+ return "only IP version 4 supported";
+
return ilstart(c, IL_CONNECT, fast);
}
@@ -548,6 +551,9 @@
ih = (Ilhdr *)bp->rp;
plen = blocklen(bp);
+ if(plen > 0 && (ih->vihl&0xF0)!=IP_VER4)
+ goto raise; /* ignore non V4 packets */
+
if(plen < IL_IPSIZE+IL_HDRSIZE){netlog(il->f, Logil, "il: hlenerr\n");
ipriv->stats[HlenErrs]++;