Porting of listen_socket, telnet_server to linux

net/base/net_util.cc

Index: net/base/net_util.cc
===================================================================
--- net/base/net_util.cc	(revision 3911)
+++ net/base/net_util.cc	(working copy)
@@ -10,8 +10,13 @@
 #include <unicode/uscript.h>
 #include <unicode/uset.h>
 
-#ifdef OS_WIN
+#include "build/build_config.h"
+
+#if defined(OS_WIN)
 #include <windows.h>
+#elif defined(OS_POSIX)
+#include <sys/socket.h>
+#include <fcntl.h>
 #endif
 
 #include "net/base/net_util.h"
@@ -913,4 +918,16 @@
   return IsPortAllowedByDefault(port);
 }
 
+int SetNonBlocking(int fd) {
+#if defined(OS_WIN)
+  unsigned long no_block = 1;
+  return ioctlsocket(fd, FIONBIO, &no_block);
+#elif defined(OS_POSIX)
+  int flags = fcntl(fd, F_GETFL, 0);
+  if (-1 == flags)
+    flags = 0;
+  return fcntl(fd, F_SETFL, 0);
+#endif
+}
+
 }  // namespace net