Add remoteHost to Socket.

runtime/bin/socket_linux.cc

Index: runtime/bin/socket_linux.cc
diff --git a/runtime/bin/socket_linux.cc b/runtime/bin/socket_linux.cc
index 57772ae13cb14974f969ae71f751c998d0fa2413..40c6eafbe4b750538ee36fca376f466843ece7d6 100644
--- a/runtime/bin/socket_linux.cc
+++ b/runtime/bin/socket_linux.cc
@@ -102,7 +102,7 @@ intptr_t Socket::GetPort(intptr_t fd) {
 }
 
 
-intptr_t Socket::GetRemotePort(intptr_t fd) {
+bool Socket::GetRemotePeer(intptr_t fd, const char **host, intptr_t *port) {
   ASSERT(fd >= 0);
   struct sockaddr_in socket_address;
   socklen_t size = sizeof(socket_address);
@@ -111,9 +111,20 @@ intptr_t Socket::GetRemotePort(intptr_t fd) {
                       reinterpret_cast<struct sockaddr *>(&socket_address),
                       &size))) {
     fprintf(stderr, "Error getpeername: %s\n", strerror(errno));
-    return 0;
+    return false;
   }
-  return ntohs(socket_address.sin_port);
+  char* buffer = new char[INET_ADDRSTRLEN];
+  if (inet_ntop(socket_address.sin_family,
+                reinterpret_cast<const void *>(&socket_address.sin_addr),
+                buffer,
+                INET_ADDRSTRLEN) == NULL) {
+    fprintf(stderr, "Error inet_ntop: %s\n", strerror(errno));
+    delete[] buffer;
+    return false;
+  }
+  *host = buffer;
+  *port = ntohs(socket_address.sin_port);
+  return true;
 }