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Add support for IPv6 over GRE [1]. PR kern/80340 includes the

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FreeBSD specific ip_newid() changes NetBSD does not have.
Correct handling of non AF_INET packets passed to bpf [2].

PR:		kern/80340[1], NetBSD PRs 29150[1], 30844[2]
Obtained from:	NetBSD ip_gre.c rev. 1.34,1.35, if_gre.c rev. 1.56
Submitted by:	Gert Doering <gert at greenie.muc.de>[2]
MFC after:	4 days
This commit is contained in:
Bjoern A. Zeeb 2005-08-01 08:14:21 +00:00
parent 049d6489ab
commit 9e669156d4
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=148613
2 changed files with 31 additions and 6 deletions
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22
sys/net/if_gre.c
View File

@ -8,6 +8,8 @@
* This code is derived from software contributed to The NetBSD Foundation
* by Heiko W.Rupp <hwr@pilhuhn.de>
*
* IPv6-over-GRE contributed by Gert Doering <gert@greenie.muc.de>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
@ -39,7 +41,7 @@
/*
* Encapsulate L3 protocols into IP
* See RFC 1701 and 1702 for more details.
* See RFC 2784 (successor of RFC 1701 and 1702) for more details.
* If_gre is compatible with Cisco GRE tunnels, so you can
* have a NetBSD box as the other end of a tunnel interface of a Cisco
* router. See gre(4) for more details.
@ -237,6 +239,8 @@ gre_output(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst,
struct gre_softc *sc = ifp->if_softc;
struct greip *gh;
struct ip *ip;
u_short ip_id = 0;
uint8_t ip_tos = 0;
u_int16_t etype = 0;
struct mobile_h mob_h;
u_int32_t af;
@ -352,8 +356,16 @@ gre_output(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst,
switch (dst->sa_family) {
case AF_INET:
ip = mtod(m, struct ip *);
ip_tos = ip->ip_tos;
ip_id = ip->ip_id;
etype = ETHERTYPE_IP;
break;
#ifdef INET6
case AF_INET6:
ip_id = ip_newid();
etype = ETHERTYPE_IPV6;
break;
#endif
#ifdef NETATALK
case AF_APPLETALK:
etype = ETHERTYPE_ATALK;
@ -393,8 +405,8 @@ gre_output(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst,
((struct ip*)gh)->ip_v = IPPROTO_IPV4;
((struct ip*)gh)->ip_hl = (sizeof(struct ip)) >> 2;
((struct ip*)gh)->ip_ttl = GRE_TTL;
((struct ip*)gh)->ip_tos = ip->ip_tos;
((struct ip*)gh)->ip_id = ip->ip_id;
((struct ip*)gh)->ip_tos = ip_tos;
((struct ip*)gh)->ip_id = ip_id;
gh->gi_len = m->m_pkthdr.len;
}
@ -472,6 +484,10 @@ gre_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
#ifdef INET
case AF_INET:
break;
#endif
#ifdef INET6
case AF_INET6:
break;
#endif
default:
error = EAFNOSUPPORT;

15
sys/netinet/ip_gre.c
View File

@ -8,6 +8,8 @@
* This code is derived from software contributed to The NetBSD Foundation
* by Heiko W.Rupp <hwr@pilhuhn.de>
*
* IPv6-over-GRE contributed by Gert Doering <gert@greenie.muc.de>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
@ -45,6 +47,7 @@
#include "opt_inet.h"
#include "opt_atalk.h"
#include "opt_inet6.h"
#include <sys/param.h>
#include <sys/systm.h>
@ -142,6 +145,7 @@ gre_input2(struct mbuf *m ,int hlen, u_char proto)
int isr;
struct gre_softc *sc;
u_int16_t flags;
u_int32_t af;
if ((sc = gre_lookup(m, proto)) == NULL) {
/* No matching tunnel or tunnel is down. */
@ -183,14 +187,20 @@ gre_input2(struct mbuf *m ,int hlen, u_char proto)
/* FALLTHROUGH */
case ETHERTYPE_IP: /* shouldn't need a schednetisr(), */
isr = NETISR_IP;/* as we are in ip_input */
af = AF_INET;
break;
#ifdef INET6
case ETHERTYPE_IPV6:
isr = NETISR_IPV6;
af = AF_INET6;
break;
#endif
#ifdef NETATALK
case ETHERTYPE_ATALK:
isr = NETISR_ATALK1;
af = AF_APPLETALK;
break;
#endif
case ETHERTYPE_IPV6:
/* FALLTHROUGH */
default: /* others not yet supported */
return (0);
}
@ -208,7 +218,6 @@ gre_input2(struct mbuf *m ,int hlen, u_char proto)
m_adj(m, hlen);
if (GRE2IFP(sc)->if_bpf) {
u_int32_t af = AF_INET;
bpf_mtap2(GRE2IFP(sc)->if_bpf, &af, sizeof(af), m);
}