Add NetworkAdaptor to dart:io.

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 04ecbe7c836609e9e57c2b21e839a78a092e9371..4067e95409f6e68fb14846c500ce238d0d659077 100644
--- a/runtime/bin/socket_linux.cc
+++ b/runtime/bin/socket_linux.cc
@@ -12,6 +12,8 @@
 #include <sys/stat.h>  // NOLINT
 #include <unistd.h>  // NOLINT
 #include <netinet/tcp.h>  // NOLINT
+#include <ifaddrs.h>  // NOLINT
+#include <net/if.h>  // NOLINT
 
 #include "bin/fdutils.h"
 #include "bin/file.h"
@@ -22,17 +24,17 @@
 namespace dart {
 namespace bin {
 
-SocketAddress::SocketAddress(struct addrinfo* addrinfo) {
+SocketAddress::SocketAddress(struct sockaddr* sockaddr) {
   ASSERT(INET6_ADDRSTRLEN >= INET_ADDRSTRLEN);
-  RawAddr* raw = reinterpret_cast<RawAddr*>(addrinfo->ai_addr);
-  const char* result = inet_ntop(addrinfo->ai_family,
+  RawAddr* raw = reinterpret_cast<RawAddr*>(sockaddr);
+  const char* result = inet_ntop(sockaddr->sa_family,
                                  &raw->in.sin_addr,
                                  as_string_,
                                  INET6_ADDRSTRLEN);
   if (result == NULL) as_string_[0] = 0;
   memmove(reinterpret_cast<void *>(&addr_),
-          addrinfo->ai_addr,
-          addrinfo->ai_addrlen);
+          sockaddr,
+          GetAddrLength(*raw));
 }
 
 
@@ -208,11 +210,9 @@ SocketAddresses* Socket::LookupAddress(const char* host,
     if (c->ai_family == AF_INET || c->ai_family == AF_INET6) count++;
   }
   SocketAddresses* addresses = new SocketAddresses(count);
-  intptr_t i = 0;
   for (struct addrinfo* c = info; c != NULL; c = c->ai_next) {
     if (c->ai_family == AF_INET || c->ai_family == AF_INET6) {
-      addresses->SetAt(i, new SocketAddress(c));
-      i++;
+      addresses->SetAt(i, new SocketAddress(c->ai_addr));
     }
   }
   freeaddrinfo(info);
@@ -220,6 +220,49 @@ SocketAddresses* Socket::LookupAddress(const char* host,
 }
 
 
+SocketAddresses* Socket::ListAdaptors(bool include_loopback,
+                                      int type,
+                                      OSError** os_error) {
+  struct ifaddrs* ifaddr;
+
+  int status = getifaddrs(&ifaddr);
+  if (status != 0) {
+    ASSERT(*os_error == NULL);
+    *os_error = new OSError(status,
+                            gai_strerror(status),
+                            OSError::kGetAddressInfo);
+    return NULL;
+  }
+
+  int lookup_family = SocketAddress::FromType(type);
+
+  intptr_t count = 0;
+  for (struct ifaddrs* ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
+    int family = ifa->ifa_addr->sa_family;
+    if ((lookup_family == family ||
+         (lookup_family == AF_UNSPEC &&
+          (family == AF_INET || family == AF_INET6))) &&
+        (include_loopback || (ifa->ifa_flags & IFF_LOOPBACK) == 0)) {
+      count++;
+    }
+  }
+
+  SocketAddresses* addresses = new SocketAddresses(count);
+  for (struct ifaddrs* ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
+    int family = ifa->ifa_addr->sa_family;
+    if ((lookup_family == family ||
+         (lookup_family == AF_UNSPEC &&
+          (family == AF_INET || family == AF_INET6))) &&
+        (include_loopback || (ifa->ifa_flags & IFF_LOOPBACK) == 0)) {
+      addresses->SetAt(i, new AdaptorSocketAddress(
+          ifa->ifa_addr, strdup(ifa->ifa_name)));
+    }
+  }
+  freeifaddrs(ifaddr);
+  return addresses;
+}
+
+
 intptr_t ServerSocket::CreateBindListen(RawAddr addr,
                                         intptr_t port,
                                         intptr_t backlog,