1 /*
2 * Copyright (c) 2021, The OpenThread Authors.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * 3. Neither the name of the copyright holder nor the
13 * names of its contributors may be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include "utils/socket_utils.hpp"
30
31 #if __linux__
32 #include <linux/netlink.h>
33 #include <linux/rtnetlink.h>
34 #endif
35
36 #include "common/code_utils.hpp"
37
SocketWithCloseExec(int aDomain,int aType,int aProtocol,SocketBlockOption aBlockOption)38 int SocketWithCloseExec(int aDomain, int aType, int aProtocol, SocketBlockOption aBlockOption)
39 {
40 int rval = 0;
41 int fd = -1;
42
43 #ifdef __APPLE__
44 VerifyOrExit((fd = socket(aDomain, aType, aProtocol)) != -1, perror("socket(SOCK_CLOEXEC)"));
45
46 VerifyOrExit((rval = fcntl(fd, F_GETFD, 0)) != -1, perror("fcntl(F_GETFD)"));
47 rval |= aBlockOption == kSocketNonBlock ? O_NONBLOCK | FD_CLOEXEC : FD_CLOEXEC;
48 VerifyOrExit((rval = fcntl(fd, F_SETFD, rval)) != -1, perror("fcntl(F_SETFD)"));
49 #else
50 aType |= aBlockOption == kSocketNonBlock ? SOCK_CLOEXEC | SOCK_NONBLOCK : SOCK_CLOEXEC;
51 VerifyOrExit((fd = socket(aDomain, aType, aProtocol)) != -1, perror("socket(SOCK_CLOEXEC)"));
52 #endif
53
54 exit:
55 if (rval == -1)
56 {
57 VerifyOrDie(close(fd) == 0, "close(fd) failed");
58 fd = -1;
59 }
60
61 return fd;
62 }
63
64 #if __linux__
CreateNetLinkRouteSocket(uint32_t aNlGroups)65 int CreateNetLinkRouteSocket(uint32_t aNlGroups)
66 {
67 int sock;
68 int rval = 0;
69 struct sockaddr_nl addr;
70
71 sock = SocketWithCloseExec(AF_NETLINK, SOCK_DGRAM, NETLINK_ROUTE, kSocketBlock);
72 VerifyOrExit(sock != -1);
73
74 memset(&addr, 0, sizeof(addr));
75 addr.nl_family = AF_NETLINK;
76 addr.nl_groups = aNlGroups; // e.g. RTMGRP_LINK | RTMGRP_IPV6_IFADDR;
77
78 rval = bind(sock, reinterpret_cast<struct sockaddr *>(&addr), sizeof(addr));
79
80 exit:
81 if (rval != 0)
82 {
83 close(sock);
84 sock = -1;
85 }
86
87 return sock;
88 }
89 #endif
90