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gnrc_sixlowpan_frag: check if own message queue is full

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When issueing the sending of the next fragment the current version of
`gnrc_sixlowpan_frag` doesn't check if the queue is full. This leads to
leakage of the packet buffer, since when it is full, the package never
gets released.

This change adds a checks and error exits in case the queue is full.
This commit is contained in:
Martine Lenders 2018-12-29 22:54:52 +01:00
parent d5bbf45d32
commit 9e3cdebae1
1 changed files with 5 additions and 1 deletions
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6
sys/net/gnrc/network_layer/sixlowpan/frag/gnrc_sixlowpan_frag.c
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@ -287,7 +287,11 @@ void gnrc_sixlowpan_frag_send(gnrc_pktsnip_t *pkt, void *ctx, unsigned page)
fragment_msg->offset += res;
msg.type = GNRC_SIXLOWPAN_MSG_FRAG_SND,
msg.content.ptr = fragment_msg;
msg_send_to_self(&msg);
if (msg_send_to_self(&msg) == 0) {
printf("6lo frag: message queue full, can't issue next fragment "
"sending\n");
goto error;
}
thread_yield();
return;
error: