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Refuse truncated packets

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Signed-off-by: Adrien Gallouët <adrien@gallouet.fr>
This commit is contained in:
Adrien Gallouët
2018-03-25 14:22:40 +00:00
parent 54bac4fcf6
commit c2eb3e4095
1 changed files with 6 additions and 2 deletions
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8
mud.c
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@@ -1266,8 +1266,12 @@ mud_recv(struct mud *mud, void *data, size_t size)
const ssize_t packet_size = recvmsg(mud->fd, &msg, 0);
if (packet_size <= (ssize_t)MUD_PACKET_MIN_SIZE)
return -(packet_size == (ssize_t)-1);
if (packet_size == (ssize_t)-1)
return -1;
if ((msg.msg_flags & (MSG_TRUNC | MSG_CTRUNC)) ||
(packet_size <= (ssize_t)MUD_PACKET_MIN_SIZE))
return 0;
const uint64_t now = mud_now();
const uint64_t send_time = mud_read48(packet);