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inject GRE packet to raw ip socket input, to support userland GRE decapsulator. 

discussed on openbsd developers list.
This commit is contained in:
itojun 2002-08-10 05:40:54 +00:00
parent 3bb8b93140
commit 6446feb7a7
1 changed files with 11 additions and 10 deletions
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19
sys/netinet/ip_gre.c
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@ -1,4 +1,4 @@
/* $NetBSD: ip_gre.c,v 1.19 2002/06/09 19:49:49 itojun Exp $ */ /* $NetBSD: ip_gre.c,v 1.20 2002/08/10 05:40:54 itojun Exp $ */
/* /*
* Copyright (c) 1998 The NetBSD Foundation, Inc. * Copyright (c) 1998 The NetBSD Foundation, Inc.
@ -43,7 +43,7 @@
*/ */
#include <sys/cdefs.h> #include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ip_gre.c,v 1.19 2002/06/09 19:49:49 itojun Exp $"); __KERNEL_RCSID(0, "$NetBSD: ip_gre.c,v 1.20 2002/08/10 05:40:54 itojun Exp $");
#include "gre.h" #include "gre.h"
#if NGRE > 0 #if NGRE > 0
@ -121,21 +121,22 @@ gre_input(m, va_alist)
va_dcl va_dcl
#endif #endif
{ {
int hlen,ret; int off, ret, proto;
va_list ap; va_list ap;
va_start(ap, m); va_start(ap, m);
hlen = va_arg(ap, int); off = va_arg(ap, int);
proto = va_arg(ap, int);
va_end(ap); va_end(ap);
ret = gre_input2(m,hlen,IPPROTO_GRE); ret = gre_input2(m, off, proto);
/* /*
* ret == 0 : packet not processed, but input from here * ret == 0 : packet not processed, meaning that
* means no matching tunnel that is up is found, * no matching tunnel that is up is found.
* so we can just free the mbuf and return * we inject it to raw ip socket to see if anyone picks it up.
*/ */
if (ret == 0) if (ret == 0)
m_freem(m); rip_input(m, off, proto);
} }
/* /*