/* * Copyright (c) 2021, The OpenThread Authors. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the copyright holder nor the * names of its contributors may be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include "utils/socket_utils.hpp" #if __linux__ #include #include #endif #include "common/code_utils.hpp" int SocketWithCloseExec(int aDomain, int aType, int aProtocol, SocketBlockOption aBlockOption) { int rval = 0; int fd = -1; #ifdef __APPLE__ VerifyOrExit((fd = socket(aDomain, aType, aProtocol)) != -1, perror("socket(SOCK_CLOEXEC)")); VerifyOrExit((rval = fcntl(fd, F_GETFD, 0)) != -1, perror("fcntl(F_GETFD)")); rval |= aBlockOption == kSocketNonBlock ? O_NONBLOCK | FD_CLOEXEC : FD_CLOEXEC; VerifyOrExit((rval = fcntl(fd, F_SETFD, rval)) != -1, perror("fcntl(F_SETFD)")); #else aType |= aBlockOption == kSocketNonBlock ? SOCK_CLOEXEC | SOCK_NONBLOCK : SOCK_CLOEXEC; VerifyOrExit((fd = socket(aDomain, aType, aProtocol)) != -1, perror("socket(SOCK_CLOEXEC)")); #endif exit: if (rval == -1) { VerifyOrDie(close(fd) == 0, "close(fd) failed"); fd = -1; } return fd; } #if __linux__ int CreateNetLinkRouteSocket(uint32_t aNlGroups) { int sock; int rval = 0; struct sockaddr_nl addr; sock = SocketWithCloseExec(AF_NETLINK, SOCK_DGRAM, NETLINK_ROUTE, kSocketBlock); VerifyOrExit(sock != -1); memset(&addr, 0, sizeof(addr)); addr.nl_family = AF_NETLINK; addr.nl_groups = aNlGroups; // e.g. RTMGRP_LINK | RTMGRP_IPV6_IFADDR; rval = bind(sock, reinterpret_cast(&addr), sizeof(addr)); exit: if (rval != 0) { close(sock); sock = -1; } return sock; } #endif