-s PROXY_POSIX_SOCKETS option: Allows POSIX sockets support via proxy…

…ing the calls out to a sockets proxy bridge via WebSockets

src/library.js

@@ -3295,6 +3295,7 @@ LibraryManager.library = {
   // arpa/inet.h
   // ==========================================================================
 
+#if PROXY_POSIX_SOCKETS == 0
   // old ipv4 only functions
   inet_addr__deps: ['_inet_pton4_raw'],
   inet_addr: function(ptr) {
@@ -4037,6 +4038,8 @@ LibraryManager.library = {
                0x0b00000a, 0x0c00000a, 0x0d00000a, 0x0e00000a] /* 0x0100000a is reserved */
   },
 
+#endif // PROXY_POSIX_SOCKETS == 0
+
   // pwd.h
 
   getpwnam: function() { throw 'getpwnam: TODO' },

src/settings.js

@@ -363,6 +363,9 @@ var SOCKET_WEBRTC = 0;
 // where addr and port are derived from the socket connect/bind/accept calls.
 var WEBSOCKET_URL = 'ws://';
 
+// If 1, the POSIX sockets API uses a proxy bridge to proxy sockets calls
+var PROXY_POSIX_SOCKETS = 0;
+
 // A string containing a comma separated list of WebSocket subprotocols
 // as would be present in the Sec-WebSocket-Protocol header.
 var WEBSOCKET_SUBPROTOCOL = 'binary';

system/include/emscripten/posix_socket.h

@@ -0,0 +1,13 @@
+#pragma once
+
+#include "websocket.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern EMSCRIPTEN_RESULT emscripten_init_websocket_to_posix_socket_bridge(const char *bridgeUrl);
+
+#ifdef __cplusplus
+}
+#endif