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authorSteve Vinoski <[email protected]>2013-08-27 11:42:00 -0400
committerLukas Larsson <[email protected]>2013-09-23 17:23:14 +0200
commit7fbf2c26ac063988818230a0e18a9df48c2fbf2d (patch)
tree8ee574a718eb61d7d99133e47a2a37bc1d94e115 /lib/kernel/src
parentcc3c34fce28062afcaadc288b69939ced8fd8cde (diff)
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add {active,N} socket option for TCP, UDP, and SCTP
Add the {active,N} socket option, where N is an integer in the range -32768..32767, to allow a caller to specify the number of data messages to be delivered to the controlling process. Once the socket's delivered message count either reaches 0 or is explicitly set to 0 with inet:setopts/2 or by including {active,0} as an option when the socket is created, the socket transitions to passive ({active, false}) mode and the socket's controlling process receives a message to inform it of the transition. TCP sockets receive {tcp_passive,Socket}, UDP sockets receive {udp_passive,Socket} and SCTP sockets receive {sctp_passive,Socket}. The socket's delivered message counter defaults to 0, but it can be set using {active,N} via any gen_tcp, gen_udp, or gen_sctp function that takes socket options as arguments, or via inet:setopts/2. New N values are added to the socket's current counter value, and negative numbers can be used to reduce the counter value. Specifying a number that would cause the socket's counter value to go above 32767 causes an einval error. If a negative number is specified such that the counter value would become negative, the socket's counter value is set to 0 and the socket transitions to passive mode. If the counter value is already 0 and inet:setopts(Socket, [{active,0}]) is specified, the counter value remains at 0 but the appropriate passive mode transition message is generated for the socket. This commit contains a modified preloaded prim_inet.beam due to changes in prim_inet.erl. Add tests for {active,N} mode for TCP, UDP, and SCTP sockets. Add documentation for {active,N} mode for inet, gen_tcp, gen_udp, and gen_sctp.
Diffstat (limited to 'lib/kernel/src')
-rw-r--r--lib/kernel/src/gen_sctp.erl2
-rw-r--r--lib/kernel/src/gen_tcp.erl2
-rw-r--r--lib/kernel/src/gen_udp.erl2
-rw-r--r--lib/kernel/src/inet.erl14
-rw-r--r--lib/kernel/src/inet_int.hrl1
5 files changed, 17 insertions, 4 deletions
diff --git a/lib/kernel/src/gen_sctp.erl b/lib/kernel/src/gen_sctp.erl
index 0d005eb651..23a698f9b2 100644
--- a/lib/kernel/src/gen_sctp.erl
+++ b/lib/kernel/src/gen_sctp.erl
@@ -36,7 +36,7 @@
-type assoc_id() :: term().
-type option() ::
- {active, true | false | once} |
+ {active, true | false | once | -32768..32767} |
{buffer, non_neg_integer()} |
{dontroute, boolean()} |
{high_msgq_watermark, pos_integer()} |
diff --git a/lib/kernel/src/gen_tcp.erl b/lib/kernel/src/gen_tcp.erl
index 96026aa428..bc8ffbe5e3 100644
--- a/lib/kernel/src/gen_tcp.erl
+++ b/lib/kernel/src/gen_tcp.erl
@@ -30,7 +30,7 @@
-include("file.hrl").
-type option() ::
- {active, true | false | once} |
+ {active, true | false | once | -32768..32767} |
{buffer, non_neg_integer()} |
{delay_send, boolean()} |
{deliver, port | term} |
diff --git a/lib/kernel/src/gen_udp.erl b/lib/kernel/src/gen_udp.erl
index e82b11d2ef..70dceb3679 100644
--- a/lib/kernel/src/gen_udp.erl
+++ b/lib/kernel/src/gen_udp.erl
@@ -26,7 +26,7 @@
-include("inet_int.hrl").
-type option() ::
- {active, true | false | once} |
+ {active, true | false | once | -32768..32767} |
{add_membership, {inet:ip_address(), inet:ip_address()}} |
{broadcast, boolean()} |
{buffer, non_neg_integer()} |
diff --git a/lib/kernel/src/inet.erl b/lib/kernel/src/inet.erl
index 9cfd3819f0..7261d6486f 100644
--- a/lib/kernel/src/inet.erl
+++ b/lib/kernel/src/inet.erl
@@ -667,6 +667,9 @@ con_opt([Opt | Opts], R, As) ->
false ->
{error, badarg}
end;
+ {active,N} when is_integer(N), N < 32768, N >= -32768 ->
+ NOpts = lists:keydelete(active, 1, R#connect_opts.opts),
+ con_opt(Opts, R#connect_opts { opts = [{active,N}|NOpts] }, As);
{Name,Val} when is_atom(Name) -> con_add(Name, Val, R, Opts, As);
_ -> {error, badarg}
end;
@@ -733,6 +736,9 @@ list_opt([Opt | Opts], R, As) ->
false ->
{error, badarg}
end;
+ {active,N} when is_integer(N), N < 32768, N >= -32768 ->
+ NOpts = lists:keydelete(active, 1, R#listen_opts.opts),
+ list_opt(Opts, R#listen_opts { opts = [{active,N}|NOpts] }, As);
{Name,Val} when is_atom(Name) -> list_add(Name, Val, R, Opts, As);
_ -> {error, badarg}
end;
@@ -787,6 +793,9 @@ udp_opt([Opt | Opts], R, As) ->
false ->
{error, badarg}
end;
+ {active,N} when is_integer(N), N < 32768, N >= -32768 ->
+ NOpts = lists:keydelete(active, 1, R#udp_opts.opts),
+ udp_opt(Opts, R#udp_opts { opts = [{active,N}|NOpts] }, As);
{Name,Val} when is_atom(Name) -> udp_add(Name, Val, R, Opts, As);
_ -> {error, badarg}
end;
@@ -805,7 +814,7 @@ udp_add(Name, Val, R, Opts, As) ->
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Currently supported options include:
% (*) {mode, list|binary} or just list|binary
-% (*) {active, true|false|once}
+% (*) {active, true|false|once|N}
% (*) {sctp_module, inet_sctp|inet6_sctp} or just inet|inet6
% (*) options set via setsockopt.
% The full list is below in sctp_options/0 .
@@ -867,6 +876,9 @@ sctp_opt([Opt|Opts], Mod, R, As) ->
false ->
{error, badarg}
end;
+ {active,N} when is_integer(N), N < 32768, N >= -32768 ->
+ NOpts = lists:keydelete(active, 1, R#sctp_opts.opts),
+ sctp_opt(Opts, Mod, R#sctp_opts { opts = [{active,N}|NOpts] }, As);
{Name,Val} -> sctp_opt (Opts, Mod, R, As, Name, Val);
_ -> {error,badarg}
end;
diff --git a/lib/kernel/src/inet_int.hrl b/lib/kernel/src/inet_int.hrl
index 18a4a61b2f..024a5fd3b6 100644
--- a/lib/kernel/src/inet_int.hrl
+++ b/lib/kernel/src/inet_int.hrl
@@ -46,6 +46,7 @@
-define(INET_PASSIVE, 0).
-define(INET_ACTIVE, 1).
-define(INET_ONCE, 2). % Active once then passive
+-define(INET_MULTI, 3). % Active N then passive
%% state codes (getstatus, INET_REQ_GETSTATUS)
-define(INET_F_OPEN, 16#0001).