X-Git-Url: https://git.artsoft.org/?a=blobdiff_plain;f=src%2Fnetserv.c;h=4c09803ff0e34939d57a6644d64ea12b103e2bfa;hb=0a414fc94edd4a357908a9eafed7e893da23bec3;hp=eef7aa111e43466b56be71b44afa311e259b3c7f;hpb=bb49e2b2a9bb4aefe76182be725e998bf9495976;p=rocksndiamonds.git

diff --git a/src/netserv.c b/src/netserv.c
index eef7aa11..4c09803f 100644
--- a/src/netserv.c
+++ b/src/netserv.c
@@ -107,7 +107,7 @@ int putNetworkString(byte *ptr, char *s)
   return strlen(s) + 1;
 }
 
-struct NetworkBuffer *newNetworkBuffer()
+struct NetworkBuffer *newNetworkBuffer(void)
 {
   struct NetworkBuffer *new = checked_calloc(sizeof(struct NetworkBuffer));
 
@@ -187,6 +187,14 @@ static void increaseNetworkBuffer(struct NetworkBuffer *nb, int additional_size)
 int receiveNetworkBufferBytes(struct NetworkBuffer *nb, TCPsocket socket,
 			     int num_bytes)
 {
+  if (num_bytes > MAX_PACKET_SIZE)
+  {
+    Error(ERR_NETWORK_SERVER, "protocol error: invalid packet size %d",
+	  num_bytes);
+
+    return -1;
+  }
+
   if (nb->pos + num_bytes > nb->max_size)
     increaseNetworkBuffer(nb, num_bytes);
 
@@ -816,7 +824,7 @@ static void Handle_OP_LEVEL_FILE(struct NetworkServerPlayerInfo *player)
   SendNetworkBufferToAllButOne(write_buffer, player);
 }
 
-void ExitNetworkServer(int exit_value)
+static void ExitNetworkServer(int exit_value)
 {
   Error(ERR_NETWORK_SERVER, "exiting network server");