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fixed the IPv4 part of bug #43904 (ip_route() must detect linkup status)

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sg 2015-03-09 21:35:57 +01:00
parent c978b25f7f
commit 905f1609b3
2 changed files with 10 additions and 8 deletions
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3
CHANGELOG
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@ -216,6 +216,9 @@ HISTORY
++ Bugfixes:
2015-03-09: Simon Goldschmidt
* ip4.c: fixed the IPv4 part of bug #43904 (ip_route() must detect linkup status)
2015-03-04: Simon Goldschmidt
* nd6.c: fixed bug #43784 (a host should send at least one Router Solicitation)

15
src/core/ipv4/ip4.c
View File

@ -140,21 +140,20 @@ ip_route(const ip_addr_t *dest)
/* iterate through netifs */
for (netif = netif_list; netif != NULL; netif = netif->next) {
/* network mask matches? */
if ((netif_is_up(netif))
#if LWIP_IPV6
/* prevent using IPv6-only interfaces */
&& (!ip_addr_isany(&(netif->ip_addr)))
#endif /* LWIP_IPV6 */
) {
/* is the netif up, does it have a link and a valid address? */
if (netif_is_up(netif) && netif_is_link_up(netif) && !ip_addr_isany(&(netif->ip_addr))) {
/* network mask matches? */
if (ip_addr_netcmp(dest, &(netif->ip_addr), &(netif->netmask))) {
/* return netif on which to forward IP packet */
return netif;
}
}
}
if ((netif_default == NULL) || !netif_is_up(netif_default) ||
if ((netif_default == NULL) || !netif_is_up(netif_default) || !netif_is_link_up(netif_default) ||
ip_addr_isany(&netif_default->ip_addr)) {
/* No matching netif found an default netif is not usable.
If this is not good enough for you, use LWIP_HOOK_IP4_ROUTE() */
LWIP_DEBUGF(IP_DEBUG | LWIP_DBG_LEVEL_SERIOUS, ("ip_route: No route to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
ip4_addr1_16(dest), ip4_addr2_16(dest), ip4_addr3_16(dest), ip4_addr4_16(dest)));
IP_STATS_INC(ip.rterr);