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-rw-r--r--src/common/socket.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/src/common/socket.c b/src/common/socket.c
index f1e1afdc8..4f7afd8fd 100644
--- a/src/common/socket.c
+++ b/src/common/socket.c
@@ -647,6 +647,14 @@ int WFIFOSET(int fd, size_t len)
ShowFatalError("WFIFOSET: Packet 0x%x is too big. (len=%u, max=%u)\n", (*(uint16*)(s->wdata + s->wdata_size)), (unsigned int)len, 0xFFFF);
exit(EXIT_FAILURE);
}
+ else if( len == 0 )
+ {
+ // abuses the fact, that the code that did WFIFOHEAD(fd,0), already wrote
+ // the packet type into memory, even if it could have overwritten vital data
+ // this can happen when a new packet was added on map-server, but packet len table was not updated
+ ShowWarning("WFIFOSET: Attempted to send zero-length packet, most likely 0x%04x (please report this).\n", WFIFOW(fd,0));
+ return 0;
+ }
if( !s->flag.server && len > socket_max_client_packet )
{// see declaration of socket_max_client_packet for details