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in case UIP_CONF_ROUTING is set, check if we have a registered routing

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module and use it for looking up the next hop of an address.
This commit is contained in:
nvt-se 2009-04-06 13:18:12 +00:00
parent faf083f09d
commit 461ba4082c
1 changed files with 30 additions and 9 deletions
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39
core/net/tcpip.c
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@ -29,7 +29,7 @@
* This file is part of the Contiki operating system.
*
*
* $Id: tcpip.c,v 1.19 2009/02/20 21:21:56 adamdunkels Exp $
* $Id: tcpip.c,v 1.20 2009/04/06 13:18:12 nvt-se Exp $
*/
/**
* \file
@ -538,19 +538,40 @@ tcpip_ipv6_output(void)
}
if(!uip_is_addr_mcast(&UIP_IP_BUF->destipaddr)) {
/*If destination is on link */
nbc = NULL;
if(uip_nd6_is_addr_onlink(&UIP_IP_BUF->destipaddr)){
nbc = uip_nd6_nbrcache_lookup(&UIP_IP_BUF->destipaddr);
} else {
#if UIP_CONF_ROUTER
/*destination is not on link*/
dr = uip_nd6_choose_defrouter();
if(dr != NULL){
nbc = dr->nb;
uip_ipaddr_t ipaddr;
uip_ipaddr_t *next_hop;
/* Try to find the next hop address in the local routing table. */
next_hop = uip_router != NULL ?
uip_router->lookup(&UIP_IP_BUF->destipaddr, &ipaddr) : NULL;
if(next_hop != NULL) {
/* Look for the next hop of the route in the neighbor cache.
Add a cache entry if we can't find it. */
nbc = uip_nd6_nbrcache_lookup(next_hop);
if(nbc == NULL) {
nbc = uip_nd6_nbrcache_add(next_hop, NULL, 1, NO_STATE);
}
} else {
/* shall we send a icmp error message destination unreachable ?*/
UIP_LOG("tcpip_ipv6_output: Destination off-link but no router");
uip_len = 0;
return;
#endif /* UIP_CONF_ROUTER */
/* No route found, check if a default router exists and use it then. */
dr = uip_nd6_choose_defrouter();
if(dr != NULL){
nbc = dr->nb;
} else {
/* shall we send a icmp error message destination unreachable ?*/
UIP_LOG("tcpip_ipv6_output: Destination off-link but no router");
uip_len = 0;
return;
}
#if UIP_CONF_ROUTER
}
#endif /* UIP_CONF_ROUTER */
}
/* there are two cases where the entry logically does not exist:
* 1 it really does not exist. 2 it is in the NO_STATE state */
@ -628,7 +649,7 @@ tcpip_ipv6_output(void)
}
}
/*multicast IP detination address */
/*multicast IP destination address */
tcpip_output(NULL);
uip_len = 0;
uip_ext_len = 0;