Make gen_tcp:recv/2 consistent with ssl:recv/2

When the HTTP packet mode has been enabled for a socket,
the ssl and gen_tcp modules have different error indications
when there is an error while parsing the HTTP header:

  ssl:recv(SSLSocket, 0) -> {ok, {http_error, _Str}}

  gen_tcp:recv(Socket, 0) -> {error, {http_error, _Str}}

We have decided to change gen_tcp:recv/2 to behave the same
way as ssl:recv/2. That means that there will be always be
an ok tuple if data could be succefully read from the socket,
and an error tuple if there was a read error at the socket level.

2 files changed, 11 insertions, 11 deletions

diff --git a/lib/kernel/doc/src/gen_tcp.xml b/lib/kernel/doc/src/gen_tcp.xml
index 032dcc5251..8e7192a496 100644
--- a/lib/kernel/doc/src/gen_tcp.xml
+++ b/lib/kernel/doc/src/gen_tcp.xml
@@ -4,7 +4,7 @@
 <erlref>
   <header>
     <copyright>
-      <year>1997</year><year>2009</year>
+      <year>1997</year><year>2010</year>
       <holder>Ericsson AB. All Rights Reserved.</holder>
     </copyright>
     <legalnotice>
@@ -284,9 +284,10 @@ socket()
       <type>
         <v>Socket = socket()</v>
         <v>Length  = int()</v>
-        <v>Packet = [char()] | binary()</v>
+        <v>Packet = [char()] | binary() | HttpPacket</v>
         <v>Timeout = int() | infinity</v>
         <v>Reason = closed | posix()</v>
+        <v>HttpPacket = see the description of <c>HttpPacket</c> in <seealso marker="erts:erlang#decode_packet/3">erlang:decode_packet/3</seealso></v>
       </type>
       <desc>
         <p>This function receives a packet from a socket in passive
diff --git a/lib/kernel/test/gen_tcp_misc_SUITE.erl b/lib/kernel/test/gen_tcp_misc_SUITE.erl
index 5d726a3b1b..d73c5fab56 100644
--- a/lib/kernel/test/gen_tcp_misc_SUITE.erl
+++ b/lib/kernel/test/gen_tcp_misc_SUITE.erl
@@ -1,19 +1,19 @@
 %%
 %% %CopyrightBegin%
-%% 
-%% Copyright Ericsson AB 1998-2009. All Rights Reserved.
-%% 
+%%
+%% Copyright Ericsson AB 1998-2010. All Rights Reserved.
+%%
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
 %% compliance with the License. You should have received a copy of the
 %% Erlang Public License along with this software. If not, it can be
 %% retrieved online at http://www.erlang.org/.
-%% 
+%%
 %% Software distributed under the License is distributed on an "AS IS"
 %% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
 %% the License for the specific language governing rights and limitations
 %% under the License.
-%% 
+%%
 %% %CopyrightEnd%
 %%
 -module(gen_tcp_misc_SUITE).
@@ -957,12 +957,11 @@ http_bad_packet(Config) when is_list(Config) ->
 
 http_worker(S) ->
     case gen_tcp:recv(S, 0, 30000) of
+	{ok,{http_error,Error}} ->
+	     io:format("Http error: ~s\n", [Error]);
 	{ok,Data} ->
 	    io:format("Data: ~p\n", [Data]),
-	    http_worker(S);
-	{error,Rsn} ->
-	    io:format("Error: ~p\n", [Rsn]),
-	    ok
+	    http_worker(S)
     end.
 
 http_bad_client(Port) ->