| // Copyright 2017 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "garnet/bin/mdns/service/mdns_interface_transceiver_v4.h" |
| |
| #include <arpa/inet.h> |
| #include <errno.h> |
| #include <sys/socket.h> |
| |
| #include "garnet/bin/mdns/service/mdns_addresses.h" |
| #include "lib/fxl/logging.h" |
| |
| namespace mdns { |
| |
| MdnsInterfaceTransceiverV4::MdnsInterfaceTransceiverV4(inet::IpAddress address, |
| const std::string& name, |
| uint32_t index) |
| : MdnsInterfaceTransceiver(address, name, index) {} |
| |
| MdnsInterfaceTransceiverV4::~MdnsInterfaceTransceiverV4() {} |
| |
| int MdnsInterfaceTransceiverV4::SetOptionJoinMulticastGroup() { |
| ip_mreqn param; |
| param.imr_multiaddr.s_addr = |
| MdnsAddresses::kV4Multicast.as_sockaddr_in().sin_addr.s_addr; |
| param.imr_address = address().as_in_addr(); |
| param.imr_ifindex = 0; |
| int result = setsockopt(socket_fd().get(), IPPROTO_IP, IP_ADD_MEMBERSHIP, |
| ¶m, sizeof(param)); |
| if (result < 0) { |
| FXL_LOG(ERROR) << "Failed to set socket option IP_ADD_MEMBERSHIP, errno " |
| << errno; |
| } |
| |
| return result; |
| } |
| |
| int MdnsInterfaceTransceiverV4::SetOptionOutboundInterface() { |
| int result = setsockopt(socket_fd().get(), IPPROTO_IP, IP_MULTICAST_IF, |
| &address().as_in_addr(), sizeof(struct in_addr)); |
| if (result < 0) { |
| if (errno == EOPNOTSUPP) { |
| FXL_LOG(WARNING) |
| << "IP_MULTICAST_IF is not supported. Proceeding anyway."; |
| result = 0; |
| } else { |
| FXL_LOG(ERROR) << "Failed to set socket option IP_MULTICAST_IF, errno " |
| << errno; |
| } |
| } |
| |
| return result; |
| } |
| |
| int MdnsInterfaceTransceiverV4::SetOptionUnicastTtl() { |
| int param = kTimeToLive_; |
| int result = |
| setsockopt(socket_fd().get(), IPPROTO_IP, IP_TTL, ¶m, sizeof(param)); |
| if (result < 0) { |
| FXL_LOG(ERROR) << "Failed to set socket option IP_TTL, errno " << errno; |
| } |
| |
| return result; |
| } |
| |
| int MdnsInterfaceTransceiverV4::SetOptionMulticastTtl() { |
| int param = kTimeToLive_; |
| int result = setsockopt(socket_fd().get(), IPPROTO_IP, IP_MULTICAST_TTL, |
| ¶m, sizeof(param)); |
| if (result < 0) { |
| FXL_LOG(ERROR) << "Failed to set socket option IP_MULTICAST_TTL, errno " |
| << errno; |
| } |
| |
| return result; |
| } |
| |
| int MdnsInterfaceTransceiverV4::SetOptionFamilySpecific() { |
| // Nothing to do. |
| return 0; |
| } |
| |
| int MdnsInterfaceTransceiverV4::Bind() { |
| int result = bind(socket_fd().get(), MdnsAddresses::kV4Bind.as_sockaddr(), |
| MdnsAddresses::kV4Bind.socklen()); |
| if (result < 0) { |
| FXL_LOG(ERROR) << "Failed to bind socket to V4 address, errno " << errno; |
| // TODO(dalesat): Remove the following once NET-1809 is fixed. |
| if (errno == EADDRINUSE) { |
| FXL_LOG(ERROR) << "(EADDRINUSE) This is probably due to NET-1809."; |
| } |
| } |
| |
| return result; |
| } |
| |
| int MdnsInterfaceTransceiverV4::SendTo(const void* buffer, size_t size, |
| const inet::SocketAddress& address) { |
| return sendto(socket_fd().get(), buffer, size, 0, address.as_sockaddr(), |
| address.socklen()); |
| } |
| |
| } // namespace mdns |