Commit 4ffe9734 authored by Juliusz Chroboczek's avatar Juliusz Chroboczek

Add safety check in fill_rtt_message.

parent dabc3f3d
......@@ -663,6 +663,8 @@ static int
fill_rtt_message(struct interface *ifp)
{
if(ifp->enable_timestamps && (ifp->buffered_hello >= 0)) {
if(ifp->sendbuf[ifp->buffered_hello + 8] == SUBTLV_PADN &&
ifp->sendbuf[ifp->buffered_hello + 9] == 4) {
unsigned int time;
/* Change the type of sub-TLV. */
ifp->sendbuf[ifp->buffered_hello + 8] = SUBTLV_TIMESTAMP;
......@@ -670,6 +672,12 @@ fill_rtt_message(struct interface *ifp)
time = time_us(now);
DO_HTONL(ifp->sendbuf + ifp->buffered_hello + 10, time);
return 1;
} else {
fprintf(stderr,
"No space left for timestamp sub-TLV "
"(this shouldn't happen)\n");
return -1;
}
}
return 0;
}
......
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