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Fix tcpip.c next hop selection

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This commit is contained in:
Simon Duquennoy 2017-06-21 18:10:55 +02:00
parent 0449187163
commit 7e9d68a2ef
1 changed files with 14 additions and 11 deletions
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25
core/net/ip/tcpip.c
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@ -509,13 +509,13 @@ get_nexthop(uip_ipaddr_t *addr)
uip_ipaddr_t *nexthop;
uip_ds6_route_t *route;
LOG_INFO("tcpip_ipv6_output: looking for next hop for host ");
LOG_INFO("output: looking for next hop for host ");
LOG_INFO_6ADDR(&UIP_IP_BUF->destipaddr);
LOG_INFO("\n");
if(NEXTHOP_NON_STORING(addr)) {
LOG_INFO("tcpip_ipv6_output: selected next hop from SRH: ");
LOG_INFO_6ADDR(nexthop);
LOG_INFO("output: selected next hop from SRH: ");
LOG_INFO_6ADDR(addr);
LOG_INFO("\n");
return addr;
}
@ -524,7 +524,7 @@ get_nexthop(uip_ipaddr_t *addr)
link. If so, we simply use the destination address as our
nexthop address. */
if(uip_ds6_is_addr_onlink(&UIP_IP_BUF->destipaddr)) {
LOG_INFO("tcpip_ipv6_output: destination is on link\n");
LOG_INFO("output: destination is on link\n");
return &UIP_IP_BUF->destipaddr;
}
@ -533,18 +533,16 @@ get_nexthop(uip_ipaddr_t *addr)
/* No route was found - we send to the default route instead. */
if(route == NULL) {
LOG_INFO("tcpip_ipv6_output: no route found, using default route: ");
LOG_INFO_6ADDR(nexthop);
LOG_INFO("\n");
nexthop = uip_ds6_defrt_choose();
if(nexthop == NULL) {
output_fallback();
} else {
LOG_INFO("output: no route found, using default route: ");
LOG_INFO_6ADDR(nexthop);
LOG_INFO("\n");
}
} else {
LOG_INFO("tcpip_ipv6_output: found next hop from routing table: ");
LOG_INFO_6ADDR(nexthop);
LOG_INFO("\n");
/* A route was found, so we look up the nexthop neighbor for
the route. */
nexthop = uip_ds6_route_nexthop(route);
@ -552,9 +550,14 @@ get_nexthop(uip_ipaddr_t *addr)
/* If the nexthop is dead, for example because the neighbor
never responded to link-layer acks, we drop its route. */
if(nexthop == NULL) {
LOG_ERR("output: found dead route\n");
drop_route(route);
/* We don't have a nexthop to send the packet to, so we drop
it. */
} else {
LOG_INFO("output: found next hop from routing table: ");
LOG_INFO_6ADDR(nexthop);
LOG_INFO("\n");
}
}
@ -625,7 +628,7 @@ send_nd6_ns(uip_ipaddr_t *nexthop)
/* Send the first NS try from here (multicast destination IP address). */
}
#else
LOG_ERR("tcpip_ipv6_output: neighbor not in cache: ");
LOG_ERR("output: neighbor not in cache: ");
LOG_ERR_6ADDR(nexthop);
LOG_ERR("\n");
#endif