bzr commit into mysql-5.1 branch (Dmitry.Shulga:3540) Bug#58887

[Dmitry Shulga]

#At file:///Users/shulga/projects/mysql/mysql-5.1-bug58887/ based on revid:mattias.jonsson@stripped

 3540 Dmitry Shulga	2011-01-11
      Fixed Bug#58887	- server not throwing "Packet too large" error
      if max_allowed_packet >= 16M.
      
      This bug was introduced by patch for bug#42503.
      
      This patch restores behaviour that there was before patch
      for bug#42503 was applied.
     @ sql/net_serv.cc
        Restored original right condition.

    modified:
      sql/net_serv.cc
=== modified file 'sql/net_serv.cc'
--- a/sql/net_serv.cc	2010-12-28 23:47:05 +0000
+++ b/sql/net_serv.cc	2011-01-11 10:44:29 +0000
@@ -170,17 +170,7 @@ my_bool net_realloc(NET *net, size_t len
   DBUG_ENTER("net_realloc");
   DBUG_PRINT("enter",("length: %lu", (ulong) length));
 
-  /*
-    When compression is off, net->where_b is always 0.
-    With compression turned on, net->where_b may indicate
-    that we still have a piece of the previous logical
-    packet in the buffer, unprocessed. Take it into account
-    when checking that max_allowed_packet is not exceeded.
-    This ensures that the client treats max_allowed_packet
-    limit identically, regardless of compression being on
-    or off.
-  */
-  if (length >= (net->max_packet_size + net->where_b))
+  if (length >= net->max_packet_size)
   {
     DBUG_PRINT("error", ("Packet too large. Max size: %lu",
                          net->max_packet_size));


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