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Untested IPv6 support added. I do not know if it compiles in IPV6 mode.

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This commit is contained in:
Pavel Machek 1999-10-11 14:19:29 +00:00
parent 720d911d77
commit c79ec2ec19
2 changed files with 34 additions and 8 deletions
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31
proto/rip/rip.c
View File

@ -4,6 +4,8 @@
* Copyright (c) 1998, 1999 Pavel Machek <pavel@ucw.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*
FIXME: IpV6 support
*/
#define LOCAL_DEBUG
@ -85,8 +87,14 @@ rip_tx( sock *s )
packet->block[i].family = htons( 2 ); /* AF_INET */
packet->block[i].tag = htons( e->tag );
packet->block[i].network = e->n.prefix;
#ifndef IPV6
packet->block[i].netmask = ipa_mkmask( e->n.pxlen );
packet->block[i].nexthop = IPA_NONE; /* FIXME: How should I set it? My own IP address? */
ipa_hton( packet->block[i].netmask );
packet->block[i].nexthop = IPA_NONE; /* FIXME: does it make sense to set this to not-me in some cases? */
ipa_hton( packet->block[i].nexthop );
#else
packet->block[i].pxlen = e->n.pxlen;
#endif
packet->block[i].metric = htonl( e->metric );
if (ipa_equal(e->whotoldme, s->daddr)) {
DBG( "(split horizont)" );
@ -94,8 +102,6 @@ rip_tx( sock *s )
packet->block[i].metric = P_CF->infinity;
}
ipa_hton( packet->block[i].network );
ipa_hton( packet->block[i].netmask );
ipa_hton( packet->block[i].nexthop );
if (i++ == ((P_CF->authtype == AT_MD5) ? PACKET_MD5_MAX : PACKET_MAX)) {
FIB_ITERATE_PUT(&c->iter, z);
@ -185,6 +191,7 @@ advertise_entry( struct proto *p, struct rip_block *b, ip_addr whotoldme )
net *n;
neighbor *neighbor;
struct rip_interface *rif;
int pxlen;
bzero(&A, sizeof(A));
A.proto = p;
@ -193,14 +200,20 @@ advertise_entry( struct proto *p, struct rip_block *b, ip_addr whotoldme )
A.cast = RTC_UNICAST;
A.dest = RTD_ROUTER;
A.flags = 0;
#ifndef IPV6
A.gw = ipa_nonzero(b->nexthop) ? b->nexthop : whotoldme;
pxlen = ipa_mklen(b->netmask);
#else
A.gw = whotoldme; /* FIXME: next hop is in other packet for v6 */
pxlen = b->pxlen;
#endif
A.from = whotoldme;
/* FIXME: Check if destination looks valid - ie not net 0 or 127 */
neighbor = neigh_find( p, &A.gw, 0 );
if (!neighbor) {
log( L_ERR "%I asked me to route %I/%I using not-neighbor %I.", A.from, b->network, b->netmask, A.gw );
log( L_ERR "%I asked me to route %I/%d using not-neighbor %I.", A.from, b->network, pxlen, A.gw );
return;
}
@ -215,11 +228,11 @@ advertise_entry( struct proto *p, struct rip_block *b, ip_addr whotoldme )
/* set to: interface of nexthop */
a = rta_lookup(&A);
if (ipa_mklen(b->netmask)==-1) {
log( L_ERR "%I asked me to route %I/%I, but that is not valid netmask.", A.from, b->network, b->netmask );
if (pxlen==-1) {
log( L_ERR "%I gave me invalid pxlen/netmask for %I.", A.from, b->network );
return;
}
n = net_get( p->table, b->network, ipa_mklen( b->netmask ));
n = net_get( p->table, b->network, pxlen );
r = rte_get_temp(a);
r->u.rip.metric = ntohl(b->metric) + rif->patt->metric;
if (r->u.rip.metric > P_CF->infinity) r->u.rip.metric = P_CF->infinity;
@ -243,7 +256,7 @@ process_block( struct proto *p, struct rip_block *block, ip_addr whotoldme )
return;
}
debug( "block: %I tells me: %I/%I available, metric %d... ", whotoldme, network, block->netmask, metric );
debug( "block: %I tells me: %I/??? available, metric %d... ", whotoldme, network, metric );
advertise_entry( p, block, whotoldme );
}
@ -302,12 +315,14 @@ rip_process_packet( struct proto *p, struct rip_packet *packet, int num, ip_addr
}
/* FIXME: Need to reject packets which have no authentication */
ipa_ntoh( block->network );
#ifndef IPV6
ipa_ntoh( block->netmask );
ipa_ntoh( block->nexthop );
if (packet->heading.version == RIP_V1) {
block->netmask = block->network; /* MJ: why are macros like this?! */
ipa_class_mask( block->netmask );
}
#endif
process_block( p, block, whotoldme );
}
break;

11
proto/rip/rip.h
View File

@ -1,5 +1,7 @@
/*
* Structures for RIP protocol
*
FIXME: in V6, they insert additional entry whenever next hop differs. Such entry is identified by 0xff in metric.
*/
#include "nest/route.h"
@ -39,6 +41,7 @@ struct rip_packet_heading {
u16 unused;
};
#ifndef IPV6
struct rip_block {
u16 family; /* 0xffff on first message means this is authentication */
u16 tag;
@ -47,6 +50,14 @@ struct rip_block {
ip_addr nexthop;
u32 metric;
};
#else
struct rip_block {
ip_addr network;
u16 tag;
u8 pxlen;
u8 metric
};
#endif
struct rip_block_auth {
u16 mustbeFFFF;