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Fixes RIPng socket and neighbor handling.

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RIPng did not really work because of link-local addresses.

Thanks to Roman Hoog Antink for some notes.
This commit is contained in:
Ondrej Zajicek 2012-03-15 12:23:49 +01:00
parent 117e3c4bbf
commit f761503760
1 changed files with 18 additions and 15 deletions
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33
proto/rip/rip.c
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@ -281,7 +281,7 @@ rip_rte_update_if_better(rtable *tab, net *net, struct proto *p, rte *new)
* bird core with this route. * bird core with this route.
*/ */
static void static void
advertise_entry( struct proto *p, struct rip_block *b, ip_addr whotoldme ) advertise_entry( struct proto *p, struct rip_block *b, ip_addr whotoldme, struct iface *iface )
{ {
rta *a, A; rta *a, A;
rte *r; rte *r;
@ -309,7 +309,7 @@ advertise_entry( struct proto *p, struct rip_block *b, ip_addr whotoldme )
/* No need to look if destination looks valid - ie not net 0 or 127 -- core will do for us. */ /* No need to look if destination looks valid - ie not net 0 or 127 -- core will do for us. */
neighbor = neigh_find( p, &A.gw, 0 ); neighbor = neigh_find2( p, &A.gw, iface, 0 );
if (!neighbor) { if (!neighbor) {
log( L_REMOTE "%s: %I asked me to route %I/%d using not-neighbor %I.", p->name, A.from, b->network, pxlen, A.gw ); log( L_REMOTE "%s: %I asked me to route %I/%d using not-neighbor %I.", p->name, A.from, b->network, pxlen, A.gw );
return; return;
@ -353,7 +353,7 @@ advertise_entry( struct proto *p, struct rip_block *b, ip_addr whotoldme )
* process_block - do some basic check and pass block to advertise_entry * process_block - do some basic check and pass block to advertise_entry
*/ */
static void static void
process_block( struct proto *p, struct rip_block *block, ip_addr whotoldme ) process_block( struct proto *p, struct rip_block *block, ip_addr whotoldme, struct iface *iface )
{ {
#ifndef IPV6 #ifndef IPV6
int metric = ntohl( block->metric ); int metric = ntohl( block->metric );
@ -380,7 +380,7 @@ process_block( struct proto *p, struct rip_block *block, ip_addr whotoldme )
return; return;
} }
advertise_entry( p, block, whotoldme ); advertise_entry( p, block, whotoldme, iface );
} }
#define BAD( x ) { log( L_REMOTE "%s: " x, p->name ); return 1; } #define BAD( x ) { log( L_REMOTE "%s: " x, p->name ); return 1; }
@ -389,7 +389,7 @@ process_block( struct proto *p, struct rip_block *block, ip_addr whotoldme )
* rip_process_packet - this is main routine for incoming packets. * rip_process_packet - this is main routine for incoming packets.
*/ */
static int static int
rip_process_packet( struct proto *p, struct rip_packet *packet, int num, ip_addr whotoldme, int port ) rip_process_packet( struct proto *p, struct rip_packet *packet, int num, ip_addr whotoldme, int port, struct iface *iface )
{ {
int i; int i;
int authenticated = 0; int authenticated = 0;
@ -406,7 +406,7 @@ rip_process_packet( struct proto *p, struct rip_packet *packet, int num, ip_addr
if (P_CF->honor == HO_NEVER) if (P_CF->honor == HO_NEVER)
BAD( "They asked me to send routing table, but I was told not to do it" ); BAD( "They asked me to send routing table, but I was told not to do it" );
if ((P_CF->honor == HO_NEIGHBOR) && (!neigh_find( p, &whotoldme, 0 ))) if ((P_CF->honor == HO_NEIGHBOR) && (!neigh_find2( p, &whotoldme, iface, 0 )))
BAD( "They asked me to send routing table, but he is not my neighbor" ); BAD( "They asked me to send routing table, but he is not my neighbor" );
rip_sendto( p, whotoldme, port, HEAD(P->interfaces) ); /* no broadcast */ rip_sendto( p, whotoldme, port, HEAD(P->interfaces) ); /* no broadcast */
break; break;
@ -416,7 +416,7 @@ rip_process_packet( struct proto *p, struct rip_packet *packet, int num, ip_addr
return 1; return 1;
} }
if (!(neighbor = neigh_find( p, &whotoldme, 0 )) || neighbor->scope == SCOPE_HOST) { if (!(neighbor = neigh_find2( p, &whotoldme, iface, 0 )) || neighbor->scope == SCOPE_HOST) {
log( L_REMOTE "%s: %I send me routing info but he is not my neighbor", p->name, whotoldme ); log( L_REMOTE "%s: %I send me routing info but he is not my neighbor", p->name, whotoldme );
return 0; return 0;
} }
@ -443,7 +443,7 @@ rip_process_packet( struct proto *p, struct rip_packet *packet, int num, ip_addr
if (packet->heading.version == RIP_V1) /* FIXME (nonurgent): switch to disable this? */ if (packet->heading.version == RIP_V1) /* FIXME (nonurgent): switch to disable this? */
block->netmask = ipa_class_mask(block->network); block->netmask = ipa_class_mask(block->network);
#endif #endif
process_block( p, block, whotoldme ); process_block( p, block, whotoldme, iface );
} }
break; break;
case RIPCMD_TRACEON: case RIPCMD_TRACEON:
@ -463,12 +463,20 @@ rip_rx(sock *s, int size)
{ {
struct rip_interface *i = s->data; struct rip_interface *i = s->data;
struct proto *p = i->proto; struct proto *p = i->proto;
struct iface *iface = NULL;
int num; int num;
/* In non-listening mode, just ignore packet */ /* In non-listening mode, just ignore packet */
if (i->mode & IM_NOLISTEN) if (i->mode & IM_NOLISTEN)
return 1; return 1;
#ifdef IPV6
if (! i->iface || s->lifindex != i->iface->index)
return 1;
iface = i->iface;
#endif
CHK_MAGIC; CHK_MAGIC;
DBG( "RIP: message came: %d bytes from %I via %s\n", size, s->faddr, i->iface ? i->iface->name : "(dummy)" ); DBG( "RIP: message came: %d bytes from %I via %s\n", size, s->faddr, i->iface ? i->iface->name : "(dummy)" );
size -= sizeof( struct rip_packet_heading ); size -= sizeof( struct rip_packet_heading );
@ -477,17 +485,12 @@ rip_rx(sock *s, int size)
num = size / sizeof( struct rip_block ); num = size / sizeof( struct rip_block );
if (num>PACKET_MAX) BAD( "Too many blocks" ); if (num>PACKET_MAX) BAD( "Too many blocks" );
#ifdef IPV6
/* Try to absolutize link scope addresses */
ipa_absolutize(&s->faddr, &i->iface->addr->ip);
#endif
if (ipa_equal(i->iface->addr->ip, s->faddr)) { if (ipa_equal(i->iface->addr->ip, s->faddr)) {
DBG("My own packet\n"); DBG("My own packet\n");
return 1; return 1;
} }
rip_process_packet( p, (struct rip_packet *) s->rbuf, num, s->faddr, s->fport ); rip_process_packet( p, (struct rip_packet *) s->rbuf, num, s->faddr, s->fport, iface );
return 1; return 1;
} }
@ -701,6 +704,7 @@ new_iface(struct proto *p, struct iface *new, unsigned long flags, struct iface_
{ {
rif->sock->ttl = 1; rif->sock->ttl = 1;
rif->sock->tos = IP_PREC_INTERNET_CONTROL; rif->sock->tos = IP_PREC_INTERNET_CONTROL;
rif->sock->flags = SKF_LADDR_RX;
} }
if (new) { if (new) {
@ -712,7 +716,6 @@ new_iface(struct proto *p, struct iface *new, unsigned long flags, struct iface_
rif->sock->daddr = ipa_from_u32(0xe0000009); rif->sock->daddr = ipa_from_u32(0xe0000009);
#else #else
rif->sock->daddr = ipa_build(0xff020000, 0, 0, 9); rif->sock->daddr = ipa_build(0xff020000, 0, 0, 9);
rif->sock->saddr = new->addr->ip; /* Does not really work on Linux */
#endif #endif
} else { } else {
rif->sock->daddr = new->addr->brd; rif->sock->daddr = new->addr->brd;