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gnrc_rpl: exit early if netif_hdr is NULL in send function

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Without this fix RPL might crash when the packet buffer is full.
This commit is contained in:
Martine Lenders 2018-06-21 14:51:42 +02:00
parent 579d9d78d4
commit 0c9d7aeedc
1 changed files with 5 additions and 0 deletions
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5
sys/net/gnrc/routing/rpl/gnrc_rpl_control_messages.c
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@ -114,6 +114,11 @@ void gnrc_rpl_send(gnrc_pktsnip_t *pkt, kernel_pid_t iface, ipv6_addr_t *src, ip
pkt = hdr;
hdr = gnrc_netif_hdr_build(NULL, 0, NULL, 0);
if (hdr == NULL) {
DEBUG("RPL: Send - no space left in packet buffer\n");
gnrc_pktbuf_release(pkt);
return;
}
((gnrc_netif_hdr_t *)hdr->data)->if_pid = iface;
LL_PREPEND(pkt, hdr);