mirror of
https://github.com/espressif/openthread.git
synced 2026-07-24 21:14:06 +00:00
Yakun Xu
8612d40adf
This commit fixes the problem where OpenThread mDNS responder always sends responses to port 5353, ignoring the source port of the query. According to RFC 6762, a mDNS responder should support one-shot multicast DNS queries by sending the response to the source address and source port of the query. Changes: - Captured the actual source port from incoming queries in Simulation and POSIX platforms. - Updated otPlatMdnsSendUnicast in Simulation platform to use the provided destination port. - Verified that legacy unicast responses correctly cap TTL to 10 seconds as required by RFC 6762 section 6.7.
560 lines
17 KiB
C
560 lines
17 KiB
C
/*
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* Copyright (c) 2024, The OpenThread Authors.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the copyright holder nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "platform-simulation.h"
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#include <openthread/nat64.h>
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#include <openthread/platform/mdns_socket.h>
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#if OPENTHREAD_CONFIG_MULTICAST_DNS_ENABLE
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//---------------------------------------------------------------------------------------------------------------------
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#if OPENTHREAD_SIMULATION_MDNS_SOCKET_IMPLEMENT_POSIX
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// Provide a simplified POSIX based implementation of `otPlatMdns`
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// platform APIs. This is intended for testing.
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#include <openthread/ip6.h>
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#include <arpa/inet.h>
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#include <errno.h>
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#include <net/if.h>
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#include <netinet/in.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/socket.h>
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#include <sys/types.h>
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#include "simul_utils.h"
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#include "lib/platform/exit_code.h"
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#include "utils/code_utils.h"
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#define MAX_BUFFER_SIZE 1600
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#define MDNS_PORT 5353
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static bool sEnabled = false;
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static uint32_t sInfraIfIndex;
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static int sMdnsFd4 = -1;
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static int sMdnsFd6 = -1;
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/* this is a portability hack */
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#ifndef IPV6_ADD_MEMBERSHIP
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#ifdef IPV6_JOIN_GROUP
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#define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
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#endif
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#endif
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#ifndef IPV6_DROP_MEMBERSHIP
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#ifdef IPV6_LEAVE_GROUP
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#define IPV6_DROP_MEMBERSHIP IPV6_LEAVE_GROUP
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#endif
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#endif
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static void SetReuseAddrPort(int aFd)
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{
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int ret;
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int yes = 1;
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ret = setsockopt(aFd, SOL_SOCKET, SO_REUSEADDR, (char *)&yes, sizeof(yes));
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VerifyOrDie(ret >= 0, OT_EXIT_FAILURE);
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ret = setsockopt(aFd, SOL_SOCKET, SO_REUSEPORT, (char *)&yes, sizeof(yes));
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VerifyOrDie(ret >= 0, OT_EXIT_FAILURE);
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}
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static void OpenIp4Socket(uint32_t aInfraIfIndex)
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{
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OT_UNUSED_VARIABLE(aInfraIfIndex);
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struct sockaddr_in addr;
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int fd;
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int ret;
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uint8_t u8;
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int value;
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fd = socket(AF_INET, SOCK_DGRAM, 0);
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VerifyOrDie(fd >= 0, OT_EXIT_FAILURE);
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#ifdef __linux__
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{
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char nameBuffer[IF_NAMESIZE];
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const char *ifname;
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ifname = if_indextoname(aInfraIfIndex, nameBuffer);
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VerifyOrDie(ifname != NULL, OT_EXIT_ERROR_ERRNO);
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ret = setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, ifname, strlen(ifname));
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VerifyOrDie(ret >= 0, OT_EXIT_ERROR_ERRNO);
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}
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#else
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value = aInfraIfIndex;
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ret = setsockopt(fd, IPPROTO_IP, IP_BOUND_IF, &value, sizeof(value));
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#endif
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u8 = 255;
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ret = setsockopt(fd, IPPROTO_IP, IP_MULTICAST_TTL, &u8, sizeof(u8));
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VerifyOrDie(ret >= 0, OT_EXIT_ERROR_ERRNO);
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value = 255;
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ret = setsockopt(fd, IPPROTO_IP, IP_TTL, &value, sizeof(value));
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VerifyOrDie(ret >= 0, OT_EXIT_ERROR_ERRNO);
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u8 = 1;
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ret = setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP, &u8, sizeof(u8));
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VerifyOrDie(ret >= 0, OT_EXIT_ERROR_ERRNO);
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SetReuseAddrPort(fd);
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{
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struct ip_mreqn mreqn;
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memset(&mreqn, 0, sizeof(mreqn));
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mreqn.imr_multiaddr.s_addr = inet_addr("224.0.0.251");
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mreqn.imr_ifindex = aInfraIfIndex;
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ret = setsockopt(fd, IPPROTO_IP, IP_MULTICAST_IF, &mreqn, sizeof(mreqn));
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VerifyOrDie(ret >= 0, OT_EXIT_ERROR_ERRNO);
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}
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memset(&addr, 0, sizeof(addr));
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addr.sin_family = AF_INET;
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addr.sin_addr.s_addr = htonl(INADDR_ANY);
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addr.sin_port = htons(MDNS_PORT);
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ret = bind(fd, (struct sockaddr *)&addr, sizeof(addr));
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VerifyOrDie(ret >= 0, OT_EXIT_ERROR_ERRNO);
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sMdnsFd4 = fd;
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}
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static void JoinOrLeaveIp4MulticastGroup(bool aJoin, uint32_t aInfraIfIndex)
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{
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struct ip_mreqn mreqn;
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int ret;
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memset(&mreqn, 0, sizeof(mreqn));
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mreqn.imr_multiaddr.s_addr = inet_addr("224.0.0.251");
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mreqn.imr_ifindex = aInfraIfIndex;
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if (aJoin)
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{
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// Suggested workaround for netif not dropping
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// a previous multicast membership.
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setsockopt(sMdnsFd4, IPPROTO_IP, IP_DROP_MEMBERSHIP, &mreqn, sizeof(mreqn));
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}
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ret = setsockopt(sMdnsFd4, IPPROTO_IP, aJoin ? IP_ADD_MEMBERSHIP : IP_DROP_MEMBERSHIP, &mreqn, sizeof(mreqn));
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VerifyOrDie(ret >= 0, OT_EXIT_ERROR_ERRNO);
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}
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static void OpenIp6Socket(uint32_t aInfraIfIndex)
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{
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OT_UNUSED_VARIABLE(aInfraIfIndex);
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struct sockaddr_in6 addr6;
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int fd;
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int ret;
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int value;
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fd = socket(AF_INET6, SOCK_DGRAM, 0);
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VerifyOrDie(fd >= 0, OT_EXIT_ERROR_ERRNO);
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#ifdef __linux__
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{
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char nameBuffer[IF_NAMESIZE];
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const char *ifname;
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ifname = if_indextoname(aInfraIfIndex, nameBuffer);
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VerifyOrDie(ifname != NULL, OT_EXIT_ERROR_ERRNO);
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ret = setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, ifname, strlen(ifname));
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VerifyOrDie(ret >= 0, OT_EXIT_ERROR_ERRNO);
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}
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#else
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value = aInfraIfIndex;
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ret = setsockopt(fd, IPPROTO_IPV6, IPV6_BOUND_IF, &value, sizeof(value));
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#endif
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value = 255;
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ret = setsockopt(fd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &value, sizeof(value));
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VerifyOrDie(ret >= 0, OT_EXIT_ERROR_ERRNO);
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value = 255;
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ret = setsockopt(fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &value, sizeof(value));
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VerifyOrDie(ret >= 0, OT_EXIT_ERROR_ERRNO);
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value = 1;
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ret = setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &value, sizeof(value));
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VerifyOrDie(ret >= 0, OT_EXIT_ERROR_ERRNO);
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value = aInfraIfIndex;
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ret = setsockopt(fd, IPPROTO_IPV6, IPV6_MULTICAST_IF, &value, sizeof(value));
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VerifyOrDie(ret >= 0, OT_EXIT_ERROR_ERRNO);
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value = 1;
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ret = setsockopt(fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, &value, sizeof(value));
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VerifyOrDie(ret >= 0, OT_EXIT_ERROR_ERRNO);
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SetReuseAddrPort(fd);
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memset(&addr6, 0, sizeof(addr6));
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addr6.sin6_family = AF_INET6;
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addr6.sin6_port = htons(MDNS_PORT);
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ret = bind(fd, (struct sockaddr *)&addr6, sizeof(addr6));
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VerifyOrDie(ret >= 0, OT_EXIT_ERROR_ERRNO);
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sMdnsFd6 = fd;
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}
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static void JoinOrLeaveIp6MulticastGroup(bool aJoin, uint32_t aInfraIfIndex)
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{
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struct ipv6_mreq mreq6;
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int ret;
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memset(&mreq6, 0, sizeof(mreq6));
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inet_pton(AF_INET6, "ff02::fb", &mreq6.ipv6mr_multiaddr);
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mreq6.ipv6mr_interface = (int)aInfraIfIndex;
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if (aJoin)
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{
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// Suggested workaround for netif not dropping
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// a previous multicast membership.
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setsockopt(sMdnsFd6, IPPROTO_IPV6, IPV6_DROP_MEMBERSHIP, &mreq6, sizeof(mreq6));
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}
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ret = setsockopt(sMdnsFd6, IPPROTO_IPV6, aJoin ? IPV6_ADD_MEMBERSHIP : IPV6_DROP_MEMBERSHIP, &mreq6, sizeof(mreq6));
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VerifyOrDie(ret >= 0, OT_EXIT_ERROR_ERRNO);
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}
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otError otPlatMdnsSetListeningEnabled(otInstance *aInstance, bool aEnable, uint32_t aInfraIfIndex)
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{
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OT_UNUSED_VARIABLE(aInstance);
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if (aEnable)
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{
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otEXPECT(!sEnabled);
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OpenIp4Socket(aInfraIfIndex);
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JoinOrLeaveIp4MulticastGroup(/* aJoin */ true, aInfraIfIndex);
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OpenIp6Socket(aInfraIfIndex);
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JoinOrLeaveIp6MulticastGroup(/* aJoin */ true, aInfraIfIndex);
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sEnabled = true;
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sInfraIfIndex = aInfraIfIndex;
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}
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else
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{
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otEXPECT(sEnabled);
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JoinOrLeaveIp4MulticastGroup(/* aJoin */ false, aInfraIfIndex);
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JoinOrLeaveIp6MulticastGroup(/* aJoin */ false, aInfraIfIndex);
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close(sMdnsFd4);
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close(sMdnsFd6);
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sEnabled = false;
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}
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exit:
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return OT_ERROR_NONE;
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}
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void otPlatMdnsSendMulticast(otInstance *aInstance, otMessage *aMessage, uint32_t aInfraIfIndex)
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{
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OT_UNUSED_VARIABLE(aInstance);
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OT_UNUSED_VARIABLE(aInfraIfIndex);
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uint8_t buffer[MAX_BUFFER_SIZE];
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uint16_t length;
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int bytes;
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otEXPECT(sEnabled);
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length = otMessageRead(aMessage, 0, buffer, sizeof(buffer));
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otMessageFree(aMessage);
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{
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struct sockaddr_in addr;
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memset(&addr, 0, sizeof(addr));
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addr.sin_family = AF_INET;
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addr.sin_addr.s_addr = inet_addr("224.0.0.251");
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addr.sin_port = htons(MDNS_PORT);
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bytes = sendto(sMdnsFd4, buffer, length, 0, (struct sockaddr *)&addr, sizeof(addr));
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VerifyOrDie(bytes == length, OT_EXIT_ERROR_ERRNO);
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}
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{
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struct sockaddr_in6 addr6;
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memset(&addr6, 0, sizeof(addr6));
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addr6.sin6_family = AF_INET6;
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addr6.sin6_port = htons(MDNS_PORT);
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inet_pton(AF_INET6, "ff02::fb", &addr6.sin6_addr);
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bytes = sendto(sMdnsFd6, buffer, length, 0, (struct sockaddr *)&addr6, sizeof(addr6));
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VerifyOrDie(bytes == length, OT_EXIT_ERROR_ERRNO);
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}
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exit:
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return;
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}
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void otPlatMdnsSendUnicast(otInstance *aInstance, otMessage *aMessage, const otPlatMdnsAddressInfo *aAddress)
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{
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OT_UNUSED_VARIABLE(aInstance);
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otIp4Address ip4Addr;
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uint8_t buffer[MAX_BUFFER_SIZE];
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uint16_t length;
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int bytes;
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otEXPECT(sEnabled);
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length = otMessageRead(aMessage, 0, buffer, sizeof(buffer));
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otMessageFree(aMessage);
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if (otIp4FromIp4MappedIp6Address(&aAddress->mAddress, &ip4Addr) == OT_ERROR_NONE)
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{
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struct sockaddr_in addr;
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memset(&addr, 0, sizeof(addr));
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addr.sin_family = AF_INET;
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memcpy(&addr.sin_addr.s_addr, &ip4Addr, sizeof(otIp4Address));
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addr.sin_port = htons(aAddress->mPort);
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bytes = sendto(sMdnsFd4, buffer, length, 0, (struct sockaddr *)&addr, sizeof(addr));
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VerifyOrDie(bytes == length, OT_EXIT_ERROR_ERRNO);
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}
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else
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{
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struct sockaddr_in6 addr6;
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memset(&addr6, 0, sizeof(addr6));
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addr6.sin6_family = AF_INET6;
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addr6.sin6_port = htons(aAddress->mPort);
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memcpy(&addr6.sin6_addr, &aAddress->mAddress, sizeof(otIp6Address));
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bytes = sendto(sMdnsFd6, buffer, length, 0, (struct sockaddr *)&addr6, sizeof(addr6));
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VerifyOrDie(bytes == length, OT_EXIT_ERROR_ERRNO);
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}
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exit:
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return;
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}
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void platformMdnsSocketUpdateFdSet(fd_set *aReadFdSet, int *aMaxFd)
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{
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otEXPECT(sEnabled);
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utilsAddFdToFdSet(sMdnsFd4, aReadFdSet, aMaxFd);
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utilsAddFdToFdSet(sMdnsFd6, aReadFdSet, aMaxFd);
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exit:
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return;
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}
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void platformMdnsSocketProcess(otInstance *aInstance, const fd_set *aReadFdSet)
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{
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otEXPECT(sEnabled);
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if (FD_ISSET(sMdnsFd4, aReadFdSet))
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{
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uint8_t buffer[MAX_BUFFER_SIZE];
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struct sockaddr_in sockaddr;
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otPlatMdnsAddressInfo addrInfo;
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otMessage *message;
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socklen_t len = sizeof(sockaddr);
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ssize_t rval;
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memset(&sockaddr, 0, sizeof(sockaddr));
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rval = recvfrom(sMdnsFd4, (char *)&buffer, sizeof(buffer), 0, (struct sockaddr *)&sockaddr, &len);
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VerifyOrDie(rval >= 0, OT_EXIT_ERROR_ERRNO);
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message = otIp6NewMessage(aInstance, NULL);
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VerifyOrDie(message != NULL, OT_EXIT_FAILURE);
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VerifyOrDie(otMessageAppend(message, buffer, (uint16_t)rval) == OT_ERROR_NONE, OT_EXIT_FAILURE);
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memset(&addrInfo, 0, sizeof(addrInfo));
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otIp4ToIp4MappedIp6Address((otIp4Address *)(&sockaddr.sin_addr.s_addr), &addrInfo.mAddress);
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addrInfo.mPort = ntohs(sockaddr.sin_port);
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addrInfo.mInfraIfIndex = sInfraIfIndex;
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otPlatMdnsHandleReceive(aInstance, message, /* aInUnicast */ false, &addrInfo);
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}
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if (FD_ISSET(sMdnsFd6, aReadFdSet))
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{
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uint8_t buffer[MAX_BUFFER_SIZE];
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struct sockaddr_in6 sockaddr6;
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otPlatMdnsAddressInfo addrInfo;
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otMessage *message;
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socklen_t len = sizeof(sockaddr6);
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ssize_t rval;
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memset(&sockaddr6, 0, sizeof(sockaddr6));
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rval = recvfrom(sMdnsFd6, (char *)&buffer, sizeof(buffer), 0, (struct sockaddr *)&sockaddr6, &len);
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VerifyOrDie(rval >= 0, OT_EXIT_ERROR_ERRNO);
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message = otIp6NewMessage(aInstance, NULL);
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VerifyOrDie(message != NULL, OT_EXIT_FAILURE);
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VerifyOrDie(otMessageAppend(message, buffer, (uint16_t)rval) == OT_ERROR_NONE, OT_EXIT_FAILURE);
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memset(&addrInfo, 0, sizeof(addrInfo));
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memcpy(&addrInfo.mAddress, &sockaddr6.sin6_addr, sizeof(otIp6Address));
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addrInfo.mPort = ntohs(sockaddr6.sin6_port);
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addrInfo.mInfraIfIndex = sInfraIfIndex;
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otPlatMdnsHandleReceive(aInstance, message, /* aInUnicast */ false, &addrInfo);
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}
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exit:
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return;
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}
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//- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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// Add weak implementation of `ot` APIs for RCP build. Note that
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// `simulation` platform does not get `OPENTHREAD_RADIO` config)
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OT_TOOL_WEAK uint16_t otMessageRead(const otMessage *aMessage, uint16_t aOffset, void *aBuf, uint16_t aLength)
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{
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OT_UNUSED_VARIABLE(aMessage);
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OT_UNUSED_VARIABLE(aOffset);
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OT_UNUSED_VARIABLE(aBuf);
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OT_UNUSED_VARIABLE(aLength);
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|
fprintf(stderr, "\n\rWeak otMessageRead() is incorrectly used\n\r");
|
|
DieNow(OT_EXIT_FAILURE);
|
|
return 0;
|
|
}
|
|
|
|
OT_TOOL_WEAK void otMessageFree(otMessage *aMessage)
|
|
{
|
|
OT_UNUSED_VARIABLE(aMessage);
|
|
fprintf(stderr, "\n\rWeak otMessageFree() is incorrectly used\n\r");
|
|
DieNow(OT_EXIT_FAILURE);
|
|
}
|
|
|
|
OT_TOOL_WEAK otMessage *otIp6NewMessage(otInstance *aInstance, const otMessageSettings *aSettings)
|
|
{
|
|
OT_UNUSED_VARIABLE(aInstance);
|
|
OT_UNUSED_VARIABLE(aSettings);
|
|
|
|
fprintf(stderr, "\n\rWeak otIp6NewMessage() is incorrectly used\n\r");
|
|
DieNow(OT_EXIT_FAILURE);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
OT_TOOL_WEAK otError otMessageAppend(otMessage *aMessage, const void *aBuf, uint16_t aLength)
|
|
{
|
|
OT_UNUSED_VARIABLE(aMessage);
|
|
OT_UNUSED_VARIABLE(aBuf);
|
|
OT_UNUSED_VARIABLE(aLength);
|
|
|
|
fprintf(stderr, "\n\rWeak otMessageFree() is incorrectly used\n\r");
|
|
DieNow(OT_EXIT_FAILURE);
|
|
|
|
return OT_ERROR_NOT_IMPLEMENTED;
|
|
}
|
|
|
|
OT_TOOL_WEAK void otIp4ToIp4MappedIp6Address(const otIp4Address *aIp4Address, otIp6Address *aIp6Address)
|
|
{
|
|
OT_UNUSED_VARIABLE(aIp4Address);
|
|
OT_UNUSED_VARIABLE(aIp6Address);
|
|
|
|
fprintf(stderr, "\n\rWeak otIp4ToIp4MappedIp6Address() is incorrectly used\n\r");
|
|
DieNow(OT_EXIT_FAILURE);
|
|
}
|
|
|
|
OT_TOOL_WEAK otError otIp4FromIp4MappedIp6Address(const otIp6Address *aIp6Address, otIp4Address *aIp4Address)
|
|
{
|
|
OT_UNUSED_VARIABLE(aIp6Address);
|
|
OT_UNUSED_VARIABLE(aIp4Address);
|
|
|
|
fprintf(stderr, "\n\rWeak otIp4FromIp4MappedIp6Address() is incorrectly used\n\r");
|
|
DieNow(OT_EXIT_FAILURE);
|
|
|
|
return OT_ERROR_NOT_IMPLEMENTED;
|
|
}
|
|
|
|
OT_TOOL_WEAK void otPlatMdnsHandleReceive(otInstance *aInstance,
|
|
otMessage *aMessage,
|
|
bool aIsUnicast,
|
|
const otPlatMdnsAddressInfo *aAddress)
|
|
{
|
|
OT_UNUSED_VARIABLE(aInstance);
|
|
OT_UNUSED_VARIABLE(aMessage);
|
|
OT_UNUSED_VARIABLE(aIsUnicast);
|
|
OT_UNUSED_VARIABLE(aAddress);
|
|
|
|
fprintf(stderr, "\n\rWeak otPlatMdnsHandleReceive() is incorrectly used\n\r");
|
|
DieNow(OT_EXIT_FAILURE);
|
|
}
|
|
|
|
//---------------------------------------------------------------------------------------------------------------------
|
|
#else // OPENTHREAD_SIMULATION_MDNS_SOCKET_IMPLEMENT_POSIX
|
|
|
|
otError otPlatMdnsSetListeningEnabled(otInstance *aInstance, bool aEnable, uint32_t aInfraIfIndex)
|
|
{
|
|
OT_UNUSED_VARIABLE(aInstance);
|
|
OT_UNUSED_VARIABLE(aEnable);
|
|
OT_UNUSED_VARIABLE(aInfraIfIndex);
|
|
|
|
return OT_ERROR_NOT_IMPLEMENTED;
|
|
}
|
|
|
|
void otPlatMdnsSendMulticast(otInstance *aInstance, otMessage *aMessage, uint32_t aInfraIfIndex)
|
|
{
|
|
OT_UNUSED_VARIABLE(aInstance);
|
|
OT_UNUSED_VARIABLE(aInfraIfIndex);
|
|
|
|
otMessageFree(aMessage);
|
|
}
|
|
|
|
void otPlatMdnsSendUnicast(otInstance *aInstance, otMessage *aMessage, const otPlatMdnsAddressInfo *aAddress)
|
|
{
|
|
OT_UNUSED_VARIABLE(aInstance);
|
|
OT_UNUSED_VARIABLE(aAddress);
|
|
otMessageFree(aMessage);
|
|
}
|
|
|
|
#endif // OPENTHREAD_SIMULATION_MDNS_SOCKET_IMPLEMENT_POSIX
|
|
|
|
#endif // OPENTHREAD_CONFIG_MULTICAST_DNS_ENABLE
|