Re-land socket refactor with fixes for Windows.

runtime/bin/socket_base_fuchsia.cc

+// Copyright (c) 2016, 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.
+
+#if !defined(DART_IO_DISABLED)
+
+#include "platform/globals.h"
+#if defined(HOST_OS_FUCHSIA)
+
+#include "bin/socket_base.h"
+
+#include <errno.h>        // NOLINT
+#include <fcntl.h>        // NOLINT
+#include <ifaddrs.h>      // NOLINT
+#include <net/if.h>       // NOLINT
+#include <netinet/tcp.h>  // NOLINT
+#include <stdio.h>        // NOLINT
+#include <stdlib.h>       // NOLINT
+#include <string.h>       // NOLINT
+#include <sys/ioctl.h>    // NOLINT
+#include <sys/stat.h>     // NOLINT
+#include <unistd.h>       // NOLINT
+
+#include "bin/fdutils.h"
+#include "bin/file.h"
+#include "bin/socket_base_fuchsia.h"
+#include "platform/signal_blocker.h"
+
+// #define SOCKET_LOG_INFO 1
+// #define SOCKET_LOG_ERROR 1
+
+// define SOCKET_LOG_ERROR to get log messages only for errors.
+// define SOCKET_LOG_INFO to get log messages for both information and errors.
+#if defined(SOCKET_LOG_INFO) || defined(SOCKET_LOG_ERROR)
+#define LOG_ERR(msg, ...)                                                      \
+  {                                                                            \
+    int err = errno;                                                           \
+    Log::PrintErr("Dart Socket ERROR: %s:%d: " msg, __FILE__, __LINE__,        \
+                  ##__VA_ARGS__);                                              \
+    errno = err;                                                               \
+  }
+#if defined(SOCKET_LOG_INFO)
+#define LOG_INFO(msg, ...)                                                     \
+  Log::Print("Dart Socket INFO: %s:%d: " msg, __FILE__, __LINE__, ##__VA_ARGS__)
+#else
+#define LOG_INFO(msg, ...)
+#endif  // defined(SOCKET_LOG_INFO)
+#else
+#define LOG_ERR(msg, ...)
+#define LOG_INFO(msg, ...)
+#endif  // defined(SOCKET_LOG_INFO) || defined(SOCKET_LOG_ERROR)
+
+namespace dart {
+namespace bin {
+
+SocketAddress::SocketAddress(struct sockaddr* sa) {
+  ASSERT(INET6_ADDRSTRLEN >= INET_ADDRSTRLEN);
+  if (!SocketBase::FormatNumericAddress(*reinterpret_cast<RawAddr*>(sa),
+                                        as_string_, INET6_ADDRSTRLEN)) {
+    as_string_[0] = 0;
+  }
+  socklen_t salen = GetAddrLength(*reinterpret_cast<RawAddr*>(sa));
+  memmove(reinterpret_cast<void*>(&addr_), sa, salen);
+}
+
+
+bool SocketBase::Initialize() {
+  // Nothing to do on Fuchsia.
+  return true;
+}
+
+
+bool SocketBase::FormatNumericAddress(const RawAddr& addr,
+                                      char* address,
+                                      int len) {
+  socklen_t salen = SocketAddress::GetAddrLength(addr);
+  LOG_INFO("SocketBase::FormatNumericAddress: calling getnameinfo\n");
+  return (NO_RETRY_EXPECTED(getnameinfo(&addr.addr, salen, address, len, NULL,
+                                        0, NI_NUMERICHOST) == 0));
+}
+
+
+bool SocketBase::IsBindError(intptr_t error_number) {
+  return error_number == EADDRINUSE || error_number == EADDRNOTAVAIL ||
+         error_number == EINVAL;
+}
+
+
+intptr_t SocketBase::Available(intptr_t fd) {
+  intptr_t available = FDUtils::AvailableBytes(fd);
+  LOG_INFO("SocketBase::Available(%ld) = %ld\n", fd, available);
+  return available;
+}
+
+
+intptr_t SocketBase::Read(intptr_t fd, void* buffer, intptr_t num_bytes) {
+  ASSERT(fd >= 0);
+  LOG_INFO("SocketBase::Read: calling read(%ld, %p, %ld)\n", fd, buffer,
+           num_bytes);
+  ssize_t read_bytes = NO_RETRY_EXPECTED(read(fd, buffer, num_bytes));
+  ASSERT(EAGAIN == EWOULDBLOCK);
+  if ((read_bytes == -1) && (errno == EWOULDBLOCK)) {
+    // If the read would block we need to retry and therefore return 0
+    // as the number of bytes written.
+    read_bytes = 0;
+  } else if (read_bytes == -1) {
+    LOG_ERR("SocketBase::Read: read(%ld, %p, %ld) failed\n", fd, buffer,
+            num_bytes);
+  } else {
+    LOG_INFO("SocketBase::Read: read(%ld, %p, %ld) succeeded\n", fd, buffer,
+             num_bytes);
+  }
+  return read_bytes;
+}
+
+
+intptr_t SocketBase::RecvFrom(intptr_t fd,
+                              void* buffer,
+                              intptr_t num_bytes,
+                              RawAddr* addr) {
+  LOG_ERR("SocketBase::RecvFrom is unimplemented\n");
+  UNIMPLEMENTED();
+  return -1;
+}
+
+
+intptr_t SocketBase::Write(intptr_t fd,
+                           const void* buffer,
+                           intptr_t num_bytes) {
+  ASSERT(fd >= 0);
+  LOG_INFO("SocketBase::Write: calling write(%ld, %p, %ld)\n", fd, buffer,
+           num_bytes);
+  ssize_t written_bytes = NO_RETRY_EXPECTED(write(fd, buffer, num_bytes));
+  ASSERT(EAGAIN == EWOULDBLOCK);
+  if ((written_bytes == -1) && (errno == EWOULDBLOCK)) {
+    // If the would block we need to retry and therefore return 0 as
+    // the number of bytes written.
+    written_bytes = 0;
+  } else if (written_bytes == -1) {
+    LOG_ERR("SocketBase::Write: write(%ld, %p, %ld) failed\n", fd, buffer,
+            num_bytes);
+  } else {
+    LOG_INFO("SocketBase::Write: write(%ld, %p, %ld) succeeded\n", fd, buffer,
+             num_bytes);
+  }
+  return written_bytes;
+}
+
+
+intptr_t SocketBase::SendTo(intptr_t fd,
+                            const void* buffer,
+                            intptr_t num_bytes,
+                            const RawAddr& addr) {
+  LOG_ERR("SocketBase::SendTo is unimplemented\n");
+  UNIMPLEMENTED();
+  return -1;
+}
+
+
+intptr_t SocketBase::GetPort(intptr_t fd) {
+  ASSERT(fd >= 0);
+  RawAddr raw;
+  socklen_t size = sizeof(raw);
+  LOG_INFO("SocketBase::GetPort: calling getsockname(%ld)\n", fd);
+  if (NO_RETRY_EXPECTED(getsockname(fd, &raw.addr, &size))) {
+    return 0;
+  }
+  return SocketAddress::GetAddrPort(raw);
+}
+
+
+SocketAddress* SocketBase::GetRemotePeer(intptr_t fd, intptr_t* port) {
+  ASSERT(fd >= 0);
+  RawAddr raw;
+  socklen_t size = sizeof(raw);
+  if (NO_RETRY_EXPECTED(getpeername(fd, &raw.addr, &size))) {
+    return NULL;
+  }
+  *port = SocketAddress::GetAddrPort(raw);
+  return new SocketAddress(&raw.addr);
+}
+
+
+void SocketBase::GetError(intptr_t fd, OSError* os_error) {
+  LOG_ERR("SocketBase::GetError is unimplemented\n");
+  UNIMPLEMENTED();
+}
+
+
+int SocketBase::GetType(intptr_t fd) {
+  LOG_ERR("SocketBase::GetType is unimplemented\n");
+  UNIMPLEMENTED();
+  return File::kOther;
+}
+
+
+intptr_t SocketBase::GetStdioHandle(intptr_t num) {
+  LOG_ERR("SocketBase::GetStdioHandle is unimplemented\n");
+  UNIMPLEMENTED();
+  return num;
+}
+
+
+AddressList<SocketAddress>* SocketBase::LookupAddress(const char* host,
+                                                      int type,
+                                                      OSError** os_error) {
+  // Perform a name lookup for a host name.
+  struct addrinfo hints;
+  memset(&hints, 0, sizeof(hints));
+  hints.ai_family = SocketAddress::FromType(type);
+  hints.ai_socktype = SOCK_STREAM;
+  hints.ai_flags = AI_ADDRCONFIG;
+  hints.ai_protocol = IPPROTO_TCP;
+  struct addrinfo* info = NULL;
+  LOG_INFO("SocketBase::LookupAddress: calling getaddrinfo\n");
+  int status = NO_RETRY_EXPECTED(getaddrinfo(host, 0, &hints, &info));
+  if (status != 0) {
+    // We failed, try without AI_ADDRCONFIG. This can happen when looking up
+    // e.g. '::1', when there are no global IPv6 addresses.
+    hints.ai_flags = 0;
+    LOG_INFO("SocketBase::LookupAddress: calling getaddrinfo again\n");
+    status = NO_RETRY_EXPECTED(getaddrinfo(host, 0, &hints, &info));
+    if (status != 0) {
+      ASSERT(*os_error == NULL);
+      *os_error =
+          new OSError(status, gai_strerror(status), OSError::kGetAddressInfo);
+      return NULL;
+    }
+  }
+  intptr_t count = 0;
+  for (struct addrinfo* c = info; c != NULL; c = c->ai_next) {
+    if ((c->ai_family == AF_INET) || (c->ai_family == AF_INET6)) {
+      count++;
+    }
+  }
+  intptr_t i = 0;
+  AddressList<SocketAddress>* addresses = new AddressList<SocketAddress>(count);
+  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->ai_addr));
+      i++;
+    }
+  }
+  freeaddrinfo(info);
+  return addresses;
+}
+
+
+bool SocketBase::ReverseLookup(const RawAddr& addr,
+                               char* host,
+                               intptr_t host_len,
+                               OSError** os_error) {
+  LOG_ERR("SocketBase::ReverseLookup is unimplemented\n");
+  UNIMPLEMENTED();
+  return false;
+}
+
+
+bool SocketBase::ParseAddress(int type, const char* address, RawAddr* addr) {
+  int result;
+  if (type == SocketAddress::TYPE_IPV4) {
+    result = NO_RETRY_EXPECTED(inet_pton(AF_INET, address, &addr->in.sin_addr));
+  } else {
+    ASSERT(type == SocketAddress::TYPE_IPV6);
+    result =
+        NO_RETRY_EXPECTED(inet_pton(AF_INET6, address, &addr->in6.sin6_addr));
+  }
+  return (result == 1);
+}
+
+
+bool SocketBase::ListInterfacesSupported() {
+  return false;
+}
+
+
+AddressList<InterfaceSocketAddress>* SocketBase::ListInterfaces(
+    int type,
+    OSError** os_error) {
+  UNIMPLEMENTED();
+  return NULL;
+}
+
+
+void SocketBase::Close(intptr_t fd) {
+  ASSERT(fd >= 0);
+  NO_RETRY_EXPECTED(close(fd));
+}
+
+
+bool SocketBase::GetNoDelay(intptr_t fd, bool* enabled) {
+  LOG_ERR("SocketBase::GetNoDelay is unimplemented\n");
+  UNIMPLEMENTED();
+  return false;
+}
+
+
+bool SocketBase::SetNoDelay(intptr_t fd, bool enabled) {
+  int on = enabled ? 1 : 0;
+  return NO_RETRY_EXPECTED(setsockopt(fd, IPPROTO_TCP, TCP_NODELAY,
+                                      reinterpret_cast<char*>(&on),
+                                      sizeof(on))) == 0;
+}
+
+
+bool SocketBase::GetMulticastLoop(intptr_t fd,
+                                  intptr_t protocol,
+                                  bool* enabled) {
+  LOG_ERR("SocketBase::GetMulticastLoop is unimplemented\n");
+  UNIMPLEMENTED();
+  return false;
+}
+
+
+bool SocketBase::SetMulticastLoop(intptr_t fd,
+                                  intptr_t protocol,
+                                  bool enabled) {
+  LOG_ERR("SocketBase::SetMulticastLoop is unimplemented\n");
+  UNIMPLEMENTED();
+  return false;
+}
+
+
+bool SocketBase::GetMulticastHops(intptr_t fd, intptr_t protocol, int* value) {
+  LOG_ERR("SocketBase::GetMulticastHops is unimplemented\n");
+  UNIMPLEMENTED();
+  return false;
+}
+
+
+bool SocketBase::SetMulticastHops(intptr_t fd, intptr_t protocol, int value) {
+  LOG_ERR("SocketBase::SetMulticastHops is unimplemented\n");
+  UNIMPLEMENTED();
+  return false;
+}
+
+
+bool SocketBase::GetBroadcast(intptr_t fd, bool* enabled) {
+  LOG_ERR("SocketBase::GetBroadcast is unimplemented\n");
+  UNIMPLEMENTED();
+  return false;
+}
+
+
+bool SocketBase::SetBroadcast(intptr_t fd, bool enabled) {
+  LOG_ERR("SocketBase::SetBroadcast is unimplemented\n");
+  UNIMPLEMENTED();
+  return false;
+}
+
+
+bool SocketBase::JoinMulticast(intptr_t fd,
+                               const RawAddr& addr,
+                               const RawAddr&,
+                               int interfaceIndex) {
+  LOG_ERR("SocketBase::JoinMulticast is unimplemented\n");
+  UNIMPLEMENTED();
+  return false;
+}
+
+
+bool SocketBase::LeaveMulticast(intptr_t fd,
+                                const RawAddr& addr,
+                                const RawAddr&,
+                                int interfaceIndex) {
+  LOG_ERR("SocketBase::LeaveMulticast is unimplemented\n");
+  UNIMPLEMENTED();
+  return false;
+}
+
+}  // namespace bin
+}  // namespace dart
+
+#endif  // defined(HOST_OS_FUCHSIA)
+
+#endif  // !defined(DART_IO_DISABLED)