Throw an error if the ServerSocket host argument is invalid.

runtime/bin/socket_linux.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include <errno.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 
@@ skipping 158 matching lines @@
   return buffer;
 }
 
 
 intptr_t ServerSocket::CreateBindListen(const char* host,
                                         intptr_t port,
                                         intptr_t backlog) {
   intptr_t fd;
   struct sockaddr_in server_address;
 
+  in_addr_t s_addr = TEMP_FAILURE_RETRY(inet_addr(host));
+  if (s_addr == INADDR_NONE) {
+    return -5;
+  }
+
   fd = TEMP_FAILURE_RETRY(socket(AF_INET, SOCK_STREAM, 0));
   if (fd < 0) {
     fprintf(stderr, "Error CreateBind: %s\n", strerror(errno));
     return -1;
   }
 
   int optval = 1;
   TEMP_FAILURE_RETRY(
       setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &optval, sizeof(optval)));
 
   server_address.sin_family = AF_INET;
   server_address.sin_port = htons(port);
-  server_address.sin_addr.s_addr = inet_addr(host);
+  server_address.sin_addr.s_addr = s_addr;
   memset(&server_address.sin_zero, 0, sizeof(server_address.sin_zero));
 
   if (TEMP_FAILURE_RETRY(
           bind(fd,
                reinterpret_cast<struct sockaddr *>(&server_address),
                sizeof(server_address))) < 0) {
     TEMP_FAILURE_RETRY(close(fd));
     fprintf(stderr, "Error Bind: %s\n", strerror(errno));
     return -1;
   }
@@ skipping 29 matching lines @@
       // error. We got woken up from the poll on the listening socket,
       // but there is no connection ready to be accepted.
       ASSERT(kTemporaryFailure != -1);
       socket = kTemporaryFailure;
     }
   } else {
     FDUtils::SetNonBlocking(socket);
   }
   return socket;
 }