blob: cd12fe42fb64d3f896bee37d17be51d702bcabf2 [file] [log] [blame]
/*
*
* Copyright (c) 2020-2021 Project CHIP Authors
* Copyright (c) 2018 Google LLC.
* Copyright (c) 2013-2018 Nest Labs, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* This file implements Inet::UDPEndPoint using sockets.
*/
// Required to properly support underlying RFC3542-related fields to IPV6_PKTINFO
// on Darwin.
#define __APPLE_USE_RFC_3542
#include <inet/UDPEndPointImplSockets.h>
#include <lib/support/CodeUtils.h>
#include <lib/support/SafeInt.h>
#include <lib/support/logging/CHIPLogging.h>
#if HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif // HAVE_SYS_SOCKET_H
#include <cerrno>
#include <net/if.h>
#include <netinet/in.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include <utility>
// SOCK_CLOEXEC not defined on all platforms, e.g. iOS/macOS:
#ifndef SOCK_CLOEXEC
#define SOCK_CLOEXEC 0
#endif
// On MbedOS, INADDR_ANY does not seem to exist...
#ifndef INADDR_ANY
#define INADDR_ANY 0
#endif
#if CHIP_SYSTEM_CONFIG_USE_ZEPHYR_SOCKET_EXTENSIONS
#include "ZephyrSocket.h"
#endif // CHIP_SYSTEM_CONFIG_USE_ZEPHYR_SOCKET_EXTENSIONS
/*
* Some systems define both IPV6_{ADD,DROP}_MEMBERSHIP and
* IPV6_{JOIN,LEAVE}_GROUP while others only define
* IPV6_{JOIN,LEAVE}_GROUP. Prefer the "_MEMBERSHIP" flavor for
* parallelism with IPv4 and create the alias to the availabile
* definitions.
*/
#if defined(IPV6_ADD_MEMBERSHIP)
#define INET_IPV6_ADD_MEMBERSHIP IPV6_ADD_MEMBERSHIP
#elif defined(IPV6_JOIN_GROUP)
#define INET_IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
#elif !__ZEPHYR__
#error \
"Neither IPV6_ADD_MEMBERSHIP nor IPV6_JOIN_GROUP are defined which are required for generalized IPv6 multicast group support."
#endif // IPV6_ADD_MEMBERSHIP
#if defined(IPV6_DROP_MEMBERSHIP)
#define INET_IPV6_DROP_MEMBERSHIP IPV6_DROP_MEMBERSHIP
#elif defined(IPV6_LEAVE_GROUP)
#define INET_IPV6_DROP_MEMBERSHIP IPV6_LEAVE_GROUP
#elif !__ZEPHYR__
#error \
"Neither IPV6_DROP_MEMBERSHIP nor IPV6_LEAVE_GROUP are defined which are required for generalized IPv6 multicast group support."
#endif // IPV6_DROP_MEMBERSHIP
namespace chip {
namespace Inet {
namespace {
CHIP_ERROR IPv6Bind(int socket, const IPAddress & address, uint16_t port, InterfaceId interface)
{
struct sockaddr_in6 sa;
memset(&sa, 0, sizeof(sa));
sa.sin6_family = AF_INET6;
sa.sin6_port = htons(port);
sa.sin6_addr = address.ToIPv6();
InterfaceId::PlatformType interfaceId = interface.GetPlatformInterface();
if (!CanCastTo<decltype(sa.sin6_scope_id)>(interfaceId))
{
return CHIP_ERROR_INCORRECT_STATE;
}
sa.sin6_scope_id = static_cast<decltype(sa.sin6_scope_id)>(interfaceId);
CHIP_ERROR status = CHIP_NO_ERROR;
if (bind(socket, reinterpret_cast<const sockaddr *>(&sa), static_cast<unsigned>(sizeof(sa))) != 0)
{
status = CHIP_ERROR_POSIX(errno);
}
else
{
#ifdef IPV6_MULTICAST_IF
// Instruct the kernel that any messages to multicast destinations should be
// sent down the interface specified by the caller.
setsockopt(socket, IPPROTO_IPV6, IPV6_MULTICAST_IF, &interfaceId, sizeof(interfaceId));
#endif // defined(IPV6_MULTICAST_IF)
}
#ifdef IPV6_MULTICAST_HOPS
// Instruct the kernel that any messages to multicast destinations should be
// set with the configured hop limit value.
int hops = INET_CONFIG_IP_MULTICAST_HOP_LIMIT;
setsockopt(socket, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &hops, sizeof(hops));
#endif // defined(IPV6_MULTICAST_HOPS)
return status;
}
#if INET_CONFIG_ENABLE_IPV4
CHIP_ERROR IPv4Bind(int socket, const IPAddress & address, uint16_t port)
{
struct sockaddr_in sa;
memset(&sa, 0, sizeof(sa));
sa.sin_family = AF_INET;
sa.sin_port = htons(port);
sa.sin_addr = address.ToIPv4();
CHIP_ERROR status = CHIP_NO_ERROR;
if (bind(socket, reinterpret_cast<const sockaddr *>(&sa), static_cast<unsigned>(sizeof(sa))) != 0)
{
status = CHIP_ERROR_POSIX(errno);
}
else
{
// Allow socket transmitting broadcast packets.
constexpr int enable = 1;
setsockopt(socket, SOL_SOCKET, SO_BROADCAST, &enable, sizeof(enable));
#ifdef IP_MULTICAST_IF
// Instruct the kernel that any messages to multicast destinations should be
// sent down the interface to which the specified IPv4 address is bound.
setsockopt(socket, IPPROTO_IP, IP_MULTICAST_IF, &sa, sizeof(sa));
#endif // defined(IP_MULTICAST_IF)
}
#ifdef IP_MULTICAST_TTL
// Instruct the kernel that any messages to multicast destinations should be
// set with the configured hop limit value.
constexpr int ttl = INET_CONFIG_IP_MULTICAST_HOP_LIMIT;
setsockopt(socket, IPPROTO_IP, IP_MULTICAST_TTL, &ttl, sizeof(ttl));
#endif // defined(IP_MULTICAST_TTL)
return status;
}
#endif // INET_CONFIG_ENABLE_IPV4
} // anonymous namespace
#if CHIP_SYSTEM_CONFIG_USE_PLATFORM_MULTICAST_API
UDPEndPointImplSockets::MulticastGroupHandler UDPEndPointImplSockets::sJoinMulticastGroupHandler;
UDPEndPointImplSockets::MulticastGroupHandler UDPEndPointImplSockets::sLeaveMulticastGroupHandler;
#endif // CHIP_SYSTEM_CONFIG_USE_PLATFORM_MULTICAST_API
CHIP_ERROR UDPEndPointImplSockets::BindImpl(IPAddressType addressType, const IPAddress & addr, uint16_t port, InterfaceId interface)
{
// Make sure we have the appropriate type of socket.
ReturnErrorOnFailure(GetSocket(addressType));
if (addressType == IPAddressType::kIPv6)
{
ReturnErrorOnFailure(IPv6Bind(mSocket, addr, port, interface));
}
#if INET_CONFIG_ENABLE_IPV4
else if (addressType == IPAddressType::kIPv4)
{
ReturnErrorOnFailure(IPv4Bind(mSocket, addr, port));
}
#endif // INET_CONFIG_ENABLE_IPV4
else
{
return INET_ERROR_WRONG_ADDRESS_TYPE;
}
mBoundPort = port;
mBoundIntfId = interface;
// If an ephemeral port was requested, retrieve the actual bound port.
if (port == 0)
{
SockAddr boundAddr;
socklen_t boundAddrLen = sizeof(boundAddr);
if (getsockname(mSocket, &boundAddr.any, &boundAddrLen) == 0)
{
if (boundAddr.any.sa_family == AF_INET)
{
mBoundPort = ntohs(boundAddr.in.sin_port);
}
else if (boundAddr.any.sa_family == AF_INET6)
{
mBoundPort = ntohs(boundAddr.in6.sin6_port);
}
}
}
return CHIP_NO_ERROR;
}
CHIP_ERROR UDPEndPointImplSockets::BindInterfaceImpl(IPAddressType addressType, InterfaceId interfaceId)
{
// Make sure we have the appropriate type of socket.
ReturnErrorOnFailure(GetSocket(addressType));
#if HAVE_SO_BINDTODEVICE
CHIP_ERROR status = CHIP_NO_ERROR;
if (interfaceId.IsPresent())
{
// Start filtering on the passed interface.
char interfaceName[IF_NAMESIZE];
if (if_indextoname(interfaceId.GetPlatformInterface(), interfaceName) == nullptr)
{
status = CHIP_ERROR_POSIX(errno);
}
else if (setsockopt(mSocket, SOL_SOCKET, SO_BINDTODEVICE, interfaceName, socklen_t(strlen(interfaceName))) == -1)
{
status = CHIP_ERROR_POSIX(errno);
}
}
else
{
// Stop interface-based filtering.
if (setsockopt(mSocket, SOL_SOCKET, SO_BINDTODEVICE, "", 0) == -1)
{
status = CHIP_ERROR_POSIX(errno);
}
}
if (status == CHIP_NO_ERROR)
{
mBoundIntfId = interfaceId;
}
return status;
#else // !HAVE_SO_BINDTODEVICE
return CHIP_ERROR_NOT_IMPLEMENTED;
#endif // HAVE_SO_BINDTODEVICE
}
InterfaceId UDPEndPointImplSockets::GetBoundInterface() const
{
return mBoundIntfId;
}
uint16_t UDPEndPointImplSockets::GetBoundPort() const
{
return mBoundPort;
}
CHIP_ERROR UDPEndPointImplSockets::ListenImpl()
{
// Wait for ability to read on this endpoint.
auto * layer = static_cast<System::LayerSockets *>(&GetSystemLayer());
ReturnErrorOnFailure(layer->SetCallback(mWatch, HandlePendingIO, reinterpret_cast<intptr_t>(this)));
return layer->RequestCallbackOnPendingRead(mWatch);
}
CHIP_ERROR UDPEndPointImplSockets::SendMsgImpl(const IPPacketInfo * aPktInfo, System::PacketBufferHandle && msg)
{
// Ensure packet buffer is not null
VerifyOrReturnError(!msg.IsNull(), CHIP_ERROR_INVALID_ARGUMENT);
// Make sure we have the appropriate type of socket based on the
// destination address.
ReturnErrorOnFailure(GetSocket(aPktInfo->DestAddress.Type()));
// Ensure the destination address type is compatible with the endpoint address type.
VerifyOrReturnError(mAddrType == aPktInfo->DestAddress.Type(), CHIP_ERROR_INVALID_ARGUMENT);
// For now the entire message must fit within a single buffer.
VerifyOrReturnError(!msg->HasChainedBuffer(), CHIP_ERROR_MESSAGE_TOO_LONG);
struct iovec msgIOV;
msgIOV.iov_base = msg->Start();
msgIOV.iov_len = msg->DataLength();
#if defined(IP_PKTINFO) || defined(IPV6_PKTINFO)
uint8_t controlData[256];
memset(controlData, 0, sizeof(controlData));
#endif // defined(IP_PKTINFO) || defined(IPV6_PKTINFO)
struct msghdr msgHeader;
memset(&msgHeader, 0, sizeof(msgHeader));
msgHeader.msg_iov = &msgIOV;
msgHeader.msg_iovlen = 1;
// Construct a sockaddr_in/sockaddr_in6 structure containing the destination information.
SockAddr peerSockAddr;
memset(&peerSockAddr, 0, sizeof(peerSockAddr));
msgHeader.msg_name = &peerSockAddr;
if (mAddrType == IPAddressType::kIPv6)
{
peerSockAddr.in6.sin6_family = AF_INET6;
peerSockAddr.in6.sin6_port = htons(aPktInfo->DestPort);
peerSockAddr.in6.sin6_addr = aPktInfo->DestAddress.ToIPv6();
InterfaceId::PlatformType intfId = aPktInfo->Interface.GetPlatformInterface();
VerifyOrReturnError(CanCastTo<decltype(peerSockAddr.in6.sin6_scope_id)>(intfId), CHIP_ERROR_INCORRECT_STATE);
peerSockAddr.in6.sin6_scope_id = static_cast<decltype(peerSockAddr.in6.sin6_scope_id)>(intfId);
msgHeader.msg_namelen = sizeof(sockaddr_in6);
}
#if INET_CONFIG_ENABLE_IPV4
else
{
peerSockAddr.in.sin_family = AF_INET;
peerSockAddr.in.sin_port = htons(aPktInfo->DestPort);
peerSockAddr.in.sin_addr = aPktInfo->DestAddress.ToIPv4();
msgHeader.msg_namelen = sizeof(sockaddr_in);
}
#endif // INET_CONFIG_ENABLE_IPV4
// If the endpoint has been bound to a particular interface,
// and the caller didn't supply a specific interface to send
// on, use the bound interface. This appears to be necessary
// for messages to multicast addresses, which under Linux
// don't seem to get sent out the correct interface, despite
// the socket being bound.
InterfaceId intf = aPktInfo->Interface;
if (!intf.IsPresent())
{
intf = mBoundIntfId;
}
// If the packet should be sent over a specific interface, or with a specific source
// address, construct an IP_PKTINFO/IPV6_PKTINFO "control message" to that effect
// add add it to the message header. If the local OS doesn't support IP_PKTINFO/IPV6_PKTINFO
// fail with an error.
if (intf.IsPresent() || aPktInfo->SrcAddress.Type() != IPAddressType::kAny)
{
#if defined(IP_PKTINFO) || defined(IPV6_PKTINFO)
msgHeader.msg_control = controlData;
msgHeader.msg_controllen = sizeof(controlData);
struct cmsghdr * controlHdr = CMSG_FIRSTHDR(&msgHeader);
InterfaceId::PlatformType intfId = intf.GetPlatformInterface();
#if INET_CONFIG_ENABLE_IPV4
if (mAddrType == IPAddressType::kIPv4)
{
#if defined(IP_PKTINFO)
controlHdr->cmsg_level = IPPROTO_IP;
controlHdr->cmsg_type = IP_PKTINFO;
controlHdr->cmsg_len = CMSG_LEN(sizeof(in_pktinfo));
auto * pktInfo = reinterpret_cast<struct in_pktinfo *> CMSG_DATA(controlHdr);
if (!CanCastTo<decltype(pktInfo->ipi_ifindex)>(intfId))
{
return CHIP_ERROR_UNSUPPORTED_CHIP_FEATURE;
}
pktInfo->ipi_ifindex = static_cast<decltype(pktInfo->ipi_ifindex)>(intfId);
pktInfo->ipi_spec_dst = aPktInfo->SrcAddress.ToIPv4();
msgHeader.msg_controllen = CMSG_SPACE(sizeof(in_pktinfo));
#else // !defined(IP_PKTINFO)
return CHIP_ERROR_UNSUPPORTED_CHIP_FEATURE;
#endif // !defined(IP_PKTINFO)
}
#endif // INET_CONFIG_ENABLE_IPV4
if (mAddrType == IPAddressType::kIPv6)
{
#if defined(IPV6_PKTINFO)
controlHdr->cmsg_level = IPPROTO_IPV6;
controlHdr->cmsg_type = IPV6_PKTINFO;
controlHdr->cmsg_len = CMSG_LEN(sizeof(in6_pktinfo));
auto * pktInfo = reinterpret_cast<struct in6_pktinfo *> CMSG_DATA(controlHdr);
if (!CanCastTo<decltype(pktInfo->ipi6_ifindex)>(intfId))
{
return CHIP_ERROR_UNEXPECTED_EVENT;
}
pktInfo->ipi6_ifindex = static_cast<decltype(pktInfo->ipi6_ifindex)>(intfId);
pktInfo->ipi6_addr = aPktInfo->SrcAddress.ToIPv6();
msgHeader.msg_controllen = CMSG_SPACE(sizeof(in6_pktinfo));
#else // !defined(IPV6_PKTINFO)
return CHIP_ERROR_UNSUPPORTED_CHIP_FEATURE;
#endif // !defined(IPV6_PKTINFO)
}
#else // !(defined(IP_PKTINFO) && defined(IPV6_PKTINFO))
return CHIP_ERROR_UNSUPPORTED_CHIP_FEATURE;
#endif // !(defined(IP_PKTINFO) && defined(IPV6_PKTINFO))
}
// Send IP packet.
const ssize_t lenSent = sendmsg(mSocket, &msgHeader, 0);
if (lenSent == -1)
{
return CHIP_ERROR_POSIX(errno);
}
if (lenSent != msg->DataLength())
{
return CHIP_ERROR_OUTBOUND_MESSAGE_TOO_BIG;
}
return CHIP_NO_ERROR;
}
void UDPEndPointImplSockets::CloseImpl()
{
if (mSocket != kInvalidSocketFd)
{
static_cast<System::LayerSockets *>(&GetSystemLayer())->StopWatchingSocket(&mWatch);
close(mSocket);
mSocket = kInvalidSocketFd;
}
}
void UDPEndPointImplSockets::Free()
{
Close();
Release();
}
CHIP_ERROR UDPEndPointImplSockets::GetSocket(IPAddressType addressType)
{
if (mSocket == kInvalidSocketFd)
{
constexpr int type = (SOCK_DGRAM | SOCK_CLOEXEC);
constexpr int protocol = 0;
int family = PF_UNSPEC;
switch (addressType)
{
case IPAddressType::kIPv6:
family = PF_INET6;
break;
#if INET_CONFIG_ENABLE_IPV4
case IPAddressType::kIPv4:
family = PF_INET;
break;
#endif // INET_CONFIG_ENABLE_IPV4
default:
return INET_ERROR_WRONG_ADDRESS_TYPE;
}
mSocket = ::socket(family, type, protocol);
if (mSocket == -1)
{
return CHIP_ERROR_POSIX(errno);
}
ReturnErrorOnFailure(static_cast<System::LayerSockets *>(&GetSystemLayer())->StartWatchingSocket(mSocket, &mWatch));
mAddrType = addressType;
// NOTE WELL: the errors returned by setsockopt() here are not
// returned as Inet layer CHIP_ERROR_POSIX(errno)
// codes because they are normally expected to fail on some
// platforms where the socket option code is defined in the
// header files but not [yet] implemented. Certainly, there is
// room to improve this by connecting the build configuration
// logic up to check for implementations of these options and
// to provide appropriate HAVE_xxxxx definitions accordingly.
constexpr int one = 1;
int res = setsockopt(mSocket, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));
static_cast<void>(res);
#ifdef SO_REUSEPORT
res = setsockopt(mSocket, SOL_SOCKET, SO_REUSEPORT, &one, sizeof(one));
if (res != 0)
{
ChipLogError(Inet, "SO_REUSEPORT failed: %d", errno);
}
#endif // defined(SO_REUSEPORT)
// If creating an IPv6 socket, tell the kernel that it will be
// IPv6 only. This makes it posible to bind two sockets to
// the same port, one for IPv4 and one for IPv6.
#ifdef IPV6_V6ONLY
if (addressType == IPAddressType::kIPv6)
{
res = setsockopt(mSocket, IPPROTO_IPV6, IPV6_V6ONLY, &one, sizeof(one));
if (res != 0)
{
ChipLogError(Inet, "IPV6_V6ONLY failed: %d", errno);
}
}
#endif // defined(IPV6_V6ONLY)
#if INET_CONFIG_ENABLE_IPV4
#ifdef IP_PKTINFO
if (addressType == IPAddressType::kIPv4)
{
res = setsockopt(mSocket, IPPROTO_IP, IP_PKTINFO, &one, sizeof(one));
if (res != 0)
{
ChipLogError(Inet, "IP_PKTINFO failed: %d", errno);
}
}
#endif // defined(IP_PKTINFO)
#endif // INET_CONFIG_ENABLE_IPV4
#ifdef IPV6_RECVPKTINFO
if (addressType == IPAddressType::kIPv6)
{
res = setsockopt(mSocket, IPPROTO_IPV6, IPV6_RECVPKTINFO, &one, sizeof(one));
if (res != 0)
{
ChipLogError(Inet, "IPV6_PKTINFO failed: %d", errno);
}
}
#endif // defined(IPV6_RECVPKTINFO)
// On systems that support it, disable the delivery of SIGPIPE
// signals when writing to a closed socket. This is mostly
// needed on iOS which has the peculiar habit of sending
// SIGPIPEs on unconnected UDP sockets.
#ifdef SO_NOSIGPIPE
{
res = setsockopt(mSocket, SOL_SOCKET, SO_NOSIGPIPE, &one, sizeof(one));
if (res != 0)
{
ChipLogError(Inet, "SO_NOSIGPIPE failed: %d", errno);
}
}
#endif // defined(SO_NOSIGPIPE)
}
else if (mAddrType != addressType)
{
return CHIP_ERROR_INCORRECT_STATE;
}
return CHIP_NO_ERROR;
}
// static
void UDPEndPointImplSockets::HandlePendingIO(System::SocketEvents events, intptr_t data)
{
reinterpret_cast<UDPEndPointImplSockets *>(data)->HandlePendingIO(events);
}
void UDPEndPointImplSockets::HandlePendingIO(System::SocketEvents events)
{
if (mState != State::kListening || OnMessageReceived == nullptr || !events.Has(System::SocketEventFlags::kRead))
{
return;
}
CHIP_ERROR lStatus = CHIP_NO_ERROR;
IPPacketInfo lPacketInfo;
System::PacketBufferHandle lBuffer;
lPacketInfo.Clear();
lPacketInfo.DestPort = mBoundPort;
lBuffer = System::PacketBufferHandle::New(System::PacketBuffer::kMaxSizeWithoutReserve, 0);
if (!lBuffer.IsNull())
{
struct iovec msgIOV;
SockAddr lPeerSockAddr;
uint8_t controlData[256];
struct msghdr msgHeader;
msgIOV.iov_base = lBuffer->Start();
msgIOV.iov_len = lBuffer->AvailableDataLength();
memset(&lPeerSockAddr, 0, sizeof(lPeerSockAddr));
memset(&msgHeader, 0, sizeof(msgHeader));
msgHeader.msg_name = &lPeerSockAddr;
msgHeader.msg_namelen = sizeof(lPeerSockAddr);
msgHeader.msg_iov = &msgIOV;
msgHeader.msg_iovlen = 1;
msgHeader.msg_control = controlData;
msgHeader.msg_controllen = sizeof(controlData);
ssize_t rcvLen = recvmsg(mSocket, &msgHeader, MSG_DONTWAIT);
if (rcvLen < 0)
{
lStatus = CHIP_ERROR_POSIX(errno);
}
else if (rcvLen > lBuffer->AvailableDataLength())
{
lStatus = CHIP_ERROR_INBOUND_MESSAGE_TOO_BIG;
}
else
{
lBuffer->SetDataLength(static_cast<uint16_t>(rcvLen));
if (lPeerSockAddr.any.sa_family == AF_INET6)
{
lPacketInfo.SrcAddress = IPAddress(lPeerSockAddr.in6.sin6_addr);
lPacketInfo.SrcPort = ntohs(lPeerSockAddr.in6.sin6_port);
}
#if INET_CONFIG_ENABLE_IPV4
else if (lPeerSockAddr.any.sa_family == AF_INET)
{
lPacketInfo.SrcAddress = IPAddress(lPeerSockAddr.in.sin_addr);
lPacketInfo.SrcPort = ntohs(lPeerSockAddr.in.sin_port);
}
#endif // INET_CONFIG_ENABLE_IPV4
else
{
lStatus = CHIP_ERROR_INCORRECT_STATE;
}
}
if (lStatus == CHIP_NO_ERROR)
{
for (struct cmsghdr * controlHdr = CMSG_FIRSTHDR(&msgHeader); controlHdr != nullptr;
controlHdr = CMSG_NXTHDR(&msgHeader, controlHdr))
{
#if INET_CONFIG_ENABLE_IPV4
#ifdef IP_PKTINFO
if (controlHdr->cmsg_level == IPPROTO_IP && controlHdr->cmsg_type == IP_PKTINFO)
{
auto * inPktInfo = reinterpret_cast<struct in_pktinfo *> CMSG_DATA(controlHdr);
if (!CanCastTo<InterfaceId::PlatformType>(inPktInfo->ipi_ifindex))
{
lStatus = CHIP_ERROR_INCORRECT_STATE;
break;
}
lPacketInfo.Interface = InterfaceId(static_cast<InterfaceId::PlatformType>(inPktInfo->ipi_ifindex));
lPacketInfo.DestAddress = IPAddress(inPktInfo->ipi_addr);
continue;
}
#endif // defined(IP_PKTINFO)
#endif // INET_CONFIG_ENABLE_IPV4
#ifdef IPV6_PKTINFO
if (controlHdr->cmsg_level == IPPROTO_IPV6 && controlHdr->cmsg_type == IPV6_PKTINFO)
{
auto * in6PktInfo = reinterpret_cast<struct in6_pktinfo *> CMSG_DATA(controlHdr);
if (!CanCastTo<InterfaceId::PlatformType>(in6PktInfo->ipi6_ifindex))
{
lStatus = CHIP_ERROR_INCORRECT_STATE;
break;
}
lPacketInfo.Interface = InterfaceId(static_cast<InterfaceId::PlatformType>(in6PktInfo->ipi6_ifindex));
lPacketInfo.DestAddress = IPAddress(in6PktInfo->ipi6_addr);
continue;
}
#endif // defined(IPV6_PKTINFO)
}
}
}
else
{
lStatus = CHIP_ERROR_NO_MEMORY;
}
if (lStatus == CHIP_NO_ERROR)
{
lBuffer.RightSize();
OnMessageReceived(this, std::move(lBuffer), &lPacketInfo);
}
else
{
if (OnReceiveError != nullptr && lStatus != CHIP_ERROR_POSIX(EAGAIN))
{
OnReceiveError(this, lStatus, nullptr);
}
}
}
#if IP_MULTICAST_LOOP || IPV6_MULTICAST_LOOP
static CHIP_ERROR SocketsSetMulticastLoopback(int aSocket, bool aLoopback, int aProtocol, int aOption)
{
const unsigned int lValue = static_cast<unsigned int>(aLoopback);
if (setsockopt(aSocket, aProtocol, aOption, &lValue, sizeof(lValue)) != 0)
{
return CHIP_ERROR_POSIX(errno);
}
return CHIP_NO_ERROR;
}
#endif // IP_MULTICAST_LOOP || IPV6_MULTICAST_LOOP
static CHIP_ERROR SocketsSetMulticastLoopback(int aSocket, IPVersion aIPVersion, bool aLoopback)
{
#ifdef IPV6_MULTICAST_LOOP
CHIP_ERROR lRetval;
switch (aIPVersion)
{
case kIPVersion_6:
lRetval = SocketsSetMulticastLoopback(aSocket, aLoopback, IPPROTO_IPV6, IPV6_MULTICAST_LOOP);
break;
#if INET_CONFIG_ENABLE_IPV4
case kIPVersion_4:
lRetval = SocketsSetMulticastLoopback(aSocket, aLoopback, IPPROTO_IP, IP_MULTICAST_LOOP);
break;
#endif // INET_CONFIG_ENABLE_IPV4
default:
lRetval = INET_ERROR_WRONG_ADDRESS_TYPE;
break;
}
return (lRetval);
#else // IPV6_MULTICAST_LOOP
return CHIP_ERROR_UNSUPPORTED_CHIP_FEATURE;
#endif // IPV6_MULTICAST_LOOP
}
CHIP_ERROR UDPEndPointImplSockets::SetMulticastLoopback(IPVersion aIPVersion, bool aLoopback)
{
CHIP_ERROR lRetval = CHIP_ERROR_NOT_IMPLEMENTED;
lRetval = SocketsSetMulticastLoopback(mSocket, aIPVersion, aLoopback);
SuccessOrExit(lRetval);
exit:
return (lRetval);
}
#if INET_CONFIG_ENABLE_IPV4
CHIP_ERROR UDPEndPointImplSockets::IPv4JoinLeaveMulticastGroupImpl(InterfaceId aInterfaceId, const IPAddress & aAddress, bool join)
{
in_addr interfaceAddr;
if (aInterfaceId.IsPresent())
{
IPAddress lInterfaceAddress;
bool lInterfaceAddressFound = false;
for (InterfaceAddressIterator lAddressIterator; lAddressIterator.HasCurrent(); lAddressIterator.Next())
{
IPAddress lCurrentAddress;
if ((lAddressIterator.GetInterfaceId() == aInterfaceId) &&
(lAddressIterator.GetAddress(lCurrentAddress) == CHIP_NO_ERROR))
{
if (lCurrentAddress.IsIPv4())
{
lInterfaceAddressFound = true;
lInterfaceAddress = lCurrentAddress;
break;
}
}
}
VerifyOrReturnError(lInterfaceAddressFound, INET_ERROR_ADDRESS_NOT_FOUND);
interfaceAddr = lInterfaceAddress.ToIPv4();
}
else
{
interfaceAddr.s_addr = htonl(INADDR_ANY);
}
struct ip_mreq lMulticastRequest;
memset(&lMulticastRequest, 0, sizeof(lMulticastRequest));
lMulticastRequest.imr_interface = interfaceAddr;
lMulticastRequest.imr_multiaddr = aAddress.ToIPv4();
const int command = join ? IP_ADD_MEMBERSHIP : IP_DROP_MEMBERSHIP;
if (setsockopt(mSocket, IPPROTO_IP, command, &lMulticastRequest, sizeof(lMulticastRequest)) != 0)
{
return CHIP_ERROR_POSIX(errno);
}
return CHIP_NO_ERROR;
}
#endif // INET_CONFIG_ENABLE_IPV4
CHIP_ERROR UDPEndPointImplSockets::IPv6JoinLeaveMulticastGroupImpl(InterfaceId aInterfaceId, const IPAddress & aAddress, bool join)
{
#if CHIP_SYSTEM_CONFIG_USE_PLATFORM_MULTICAST_API
MulticastGroupHandler handler = join ? sJoinMulticastGroupHandler : sLeaveMulticastGroupHandler;
if (handler != nullptr)
{
return handler(aInterfaceId, aAddress);
}
#endif // CHIP_SYSTEM_CONFIG_USE_PLATFORM_MULTICAST_API
#ifdef IPV6_MULTICAST_IMPLEMENTED
if (!aInterfaceId.IsPresent())
{
// Do it on all the viable interfaces.
bool interfaceFound = false;
InterfaceIterator interfaceIt;
while (interfaceIt.Next())
{
if (!interfaceIt.SupportsMulticast() || !interfaceIt.IsUp())
{
continue;
}
InterfaceId interfaceId = interfaceIt.GetInterfaceId();
IPAddress ifAddr;
if (interfaceId.GetLinkLocalAddr(&ifAddr) != CHIP_NO_ERROR)
{
continue;
}
if (ifAddr.Type() != IPAddressType::kIPv6)
{
// Not the right sort of interface.
continue;
}
interfaceFound = true;
char ifName[InterfaceId::kMaxIfNameLength];
interfaceIt.GetInterfaceName(ifName, sizeof(ifName));
// Ignore errors here, except for logging, because we expect some of
// these interfaces to not work, and some (e.g. loopback) to always
// work.
CHIP_ERROR err = IPv6JoinLeaveMulticastGroupImpl(interfaceId, aAddress, join);
if (err == CHIP_NO_ERROR)
{
ChipLogDetail(Inet, " %s multicast group on interface %s", (join ? "Joined" : "Left"), ifName);
}
else
{
ChipLogError(Inet, " Failed to %s multicast group on interface %s", (join ? "join" : "leave"), ifName);
}
}
if (interfaceFound)
{
// Assume we're good.
return CHIP_NO_ERROR;
}
// Else go ahead and try to work with the default interface.
ChipLogError(Inet, "No valid IPv6 multicast interface found");
}
const InterfaceId::PlatformType lIfIndex = aInterfaceId.GetPlatformInterface();
struct ipv6_mreq lMulticastRequest;
memset(&lMulticastRequest, 0, sizeof(lMulticastRequest));
VerifyOrReturnError(CanCastTo<decltype(lMulticastRequest.ipv6mr_interface)>(lIfIndex), CHIP_ERROR_UNEXPECTED_EVENT);
lMulticastRequest.ipv6mr_interface = static_cast<decltype(lMulticastRequest.ipv6mr_interface)>(lIfIndex);
lMulticastRequest.ipv6mr_multiaddr = aAddress.ToIPv6();
const int command = join ? INET_IPV6_ADD_MEMBERSHIP : INET_IPV6_DROP_MEMBERSHIP;
if (setsockopt(mSocket, IPPROTO_IPV6, command, &lMulticastRequest, sizeof(lMulticastRequest)) != 0)
{
return CHIP_ERROR_POSIX(errno);
}
return CHIP_NO_ERROR;
#else
return CHIP_ERROR_NOT_IMPLEMENTED;
#endif
}
} // namespace Inet
} // namespace chip