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gnrc_sixlowpan_nd: fixed crash when there are no routers

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Yonezawa-T2 2015-11-19 18:19:07 +09:00
parent 26eeb9f544
commit fe0e58dce1
1 changed files with 5 additions and 0 deletions
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5
sys/net/gnrc/network_layer/sixlowpan/nd/gnrc_sixlowpan_nd.c
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@ -170,6 +170,11 @@ kernel_pid_t gnrc_sixlowpan_nd_next_hop_l2addr(uint8_t *l2addr, uint8_t *l2addr_
next_hop = gnrc_ndp_internal_default_router(); next_hop = gnrc_ndp_internal_default_router();
} }
/* no routers found */
if (next_hop == NULL) {
return KERNEL_PID_UNDEF;
}
/* address resolution of next_hop: https://tools.ietf.org/html/rfc6775#section-5.7 */ /* address resolution of next_hop: https://tools.ietf.org/html/rfc6775#section-5.7 */
if ((nc_entry == NULL) || (next_hop != dst)) { if ((nc_entry == NULL) || (next_hop != dst)) {
/* get if not gotten from previous check */ /* get if not gotten from previous check */