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Fix handling NULL-encapsulated interfaces (lo & tun)

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Reviewed by: wollman
Submitted by: dvv@sprint.net
This commit is contained in:
Andrey A. Chernov 1995-06-22 16:56:00 +00:00
parent 62172c8210
commit 11d290bdaf
1 changed files with 12 additions and 3 deletions
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15
lib/libpcap/gencode.c
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@ -20,7 +20,7 @@
*/
#ifndef lint
static char rcsid[] =
"@(#) $Header: gencode.c,v 1.55 94/06/20 19:07:53 leres Exp $ (LBL)";
"@(#) $Header: /home/ncvs/src/lib/libpcap/gencode.c,v 1.1.1.1 1995/01/20 04:13:04 jkh Exp $ (LBL)";
#endif
#include <sys/types.h>
@ -471,8 +471,8 @@ init_linktype(type)
return;
case DLT_NULL:
off_linktype = -1;
off_nl = 0;
off_linktype = 0;
off_nl = 4;
return;
case DLT_PPP:
@ -543,6 +543,15 @@ gen_linktype(proto)
if (proto == ETHERTYPE_IP)
proto = 0x0021; /* XXX - need ppp.h defs */
break;
case DLT_NULL:
if (proto == ETHERTYPE_IP) {
proto = htonl(AF_INET); /* loopback & tun put */
/* sa_family into */
/* prepended word */
return gen_cmp(off_linktype, BPF_W, (long)proto);
}
break;
}
return gen_cmp(off_linktype, BPF_H, (long)proto);
}