projects / mirror_frr.git / blame
| Commit | Line | Data |
|---|---|---|
| acddc0ed | 1 | // SPDX-License-Identifier: MIT |
| ca10883e DS |
2 | /* |
| 3 | Copyright (c) 2007, 2008 by Juliusz Chroboczek | |
| ca10883e DS |
4 | */ |
| 5 | ||
| b45ac5f5 DL |
6 | #ifdef HAVE_CONFIG_H |
| 7 | #include "config.h" | |
| 8 | #endif | |
| 9 | ||
| ca10883e DS |
10 | #include <unistd.h> |
| 11 | #include <fcntl.h> | |
| 12 | #include <string.h> | |
| 13 | #include <sys/ioctl.h> | |
| 14 | #include <sys/types.h> | |
| 15 | #include <sys/uio.h> | |
| 16 | #include <sys/socket.h> | |
| 17 | #include <netinet/in.h> | |
| 18 | #include <netinet/in_systm.h> | |
| 19 | #include <netinet/ip.h> | |
| 20 | #include <arpa/inet.h> | |
| 21 | #include <errno.h> | |
| 22 | ||
| 23 | #include "babeld.h" | |
| 24 | #include "util.h" | |
| 25 | #include "net.h" | |
| 26 | #include "sockopt.h" | |
| 27 | ||
| 28 | int | |
| 29 | babel_socket(int port) | |
| 30 | { | |
| 31 | struct sockaddr_in6 sin6; | |
| 32 | int s, rc; | |
| 33 | int saved_errno; | |
| 34 | int one = 1, zero = 0; | |
| 35 | ||
| 36 | s = socket(PF_INET6, SOCK_DGRAM, 0); | |
| 37 | if(s < 0) | |
| 38 | return -1; | |
| 39 | ||
| 40 | rc = setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY, &one, sizeof(one)); | |
| 41 | if(rc < 0) | |
| 42 | goto fail; | |
| 43 | ||
| 44 | rc = setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)); | |
| 45 | if(rc < 0) | |
| 46 | goto fail; | |
| 47 | ||
| 48 | rc = setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, | |
| 49 | &zero, sizeof(zero)); | |
| 50 | if(rc < 0) | |
| 51 | goto fail; | |
| 52 | ||
| 53 | rc = setsockopt(s, IPPROTO_IPV6, IPV6_UNICAST_HOPS, | |
| 54 | &one, sizeof(one)); | |
| 55 | if(rc < 0) | |
| 56 | goto fail; | |
| 57 | ||
| 58 | rc = setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, | |
| 59 | &one, sizeof(one)); | |
| 60 | if(rc < 0) | |
| 61 | goto fail; | |
| 62 | ||
| 63 | setsockopt_ipv6_tclass (s, IPTOS_PREC_INTERNETCONTROL); | |
| 64 | ||
| 65 | rc = fcntl(s, F_GETFL, 0); | |
| 66 | if(rc < 0) | |
| 67 | goto fail; | |
| 68 | ||
| 69 | rc = fcntl(s, F_SETFL, (rc | O_NONBLOCK)); | |
| 70 | if(rc < 0) | |
| 71 | goto fail; | |
| 72 | ||
| 73 | rc = fcntl(s, F_GETFD, 0); | |
| 74 | if(rc < 0) | |
| 75 | goto fail; | |
| 76 | ||
| 77 | rc = fcntl(s, F_SETFD, rc | FD_CLOEXEC); | |
| 78 | if(rc < 0) | |
| 79 | goto fail; | |
| 80 | ||
| 81 | memset(&sin6, 0, sizeof(sin6)); | |
| 82 | sin6.sin6_family = AF_INET6; | |
| 83 | sin6.sin6_port = htons(port); | |
| 84 | rc = bind(s, (struct sockaddr*)&sin6, sizeof(sin6)); | |
| 85 | if(rc < 0) | |
| 86 | goto fail; | |
| 87 | ||
| 88 | return s; | |
| 89 | ||
| 90 | fail: | |
| 91 | saved_errno = errno; | |
| 92 | close(s); | |
| 93 | errno = saved_errno; | |
| 94 | return -1; | |
| 95 | } | |
| 96 | ||
| 97 | int | |
| 98 | babel_recv(int s, void *buf, int buflen, struct sockaddr *sin, int slen) | |
| 99 | { | |
| 100 | struct iovec iovec; | |
| 101 | struct msghdr msg; | |
| 102 | int rc; | |
| 103 | ||
| 104 | memset(&msg, 0, sizeof(msg)); | |
| 105 | iovec.iov_base = buf; | |
| 106 | iovec.iov_len = buflen; | |
| 107 | msg.msg_name = sin; | |
| 108 | msg.msg_namelen = slen; | |
| 109 | msg.msg_iov = &iovec; | |
| 110 | msg.msg_iovlen = 1; | |
| 111 | ||
| 112 | rc = recvmsg(s, &msg, 0); | |
| 113 | return rc; | |
| 114 | } | |
| 115 | ||
| 116 | int | |
| 117 | babel_send(int s, | |
| 118 | void *buf1, int buflen1, void *buf2, int buflen2, | |
| 119 | struct sockaddr *sin, int slen) | |
| 120 | { | |
| 121 | struct iovec iovec[2]; | |
| 122 | struct msghdr msg; | |
| 123 | int rc; | |
| 124 | ||
| 125 | iovec[0].iov_base = buf1; | |
| 126 | iovec[0].iov_len = buflen1; | |
| 127 | iovec[1].iov_base = buf2; | |
| 128 | iovec[1].iov_len = buflen2; | |
| 129 | memset(&msg, 0, sizeof(msg)); | |
| c4efd0f4 | 130 | msg.msg_name = sin; |
| ca10883e DS |
131 | msg.msg_namelen = slen; |
| 132 | msg.msg_iov = iovec; | |
| 133 | msg.msg_iovlen = 2; | |
| 134 | ||
| 135 | again: | |
| 136 | rc = sendmsg(s, &msg, 0); | |
| 137 | if(rc < 0) { | |
| 138 | if(errno == EINTR) | |
| 139 | goto again; | |
| 140 | else if(errno == EAGAIN) { | |
| 141 | int rc2; | |
| 142 | rc2 = wait_for_fd(1, s, 5); | |
| 143 | if(rc2 > 0) | |
| 144 | goto again; | |
| 145 | errno = EAGAIN; | |
| 146 | } | |
| 147 | } | |
| 148 | return rc; | |
| 149 | } | |
| 150 | ||
| 151 | int | |
| 152 | tcp_server_socket(int port, int local) | |
| 153 | { | |
| 154 | struct sockaddr_in6 sin6; | |
| 155 | int s, rc, saved_errno; | |
| 156 | int one = 1; | |
| 157 | ||
| 158 | s = socket(PF_INET6, SOCK_STREAM, 0); | |
| 159 | if(s < 0) | |
| 160 | return -1; | |
| 161 | ||
| 162 | rc = setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)); | |
| 163 | if(rc < 0) | |
| 164 | goto fail; | |
| 165 | ||
| 166 | rc = fcntl(s, F_GETFL, 0); | |
| 167 | if(rc < 0) | |
| 168 | goto fail; | |
| 169 | ||
| 170 | rc = fcntl(s, F_SETFL, (rc | O_NONBLOCK)); | |
| 171 | if(rc < 0) | |
| 172 | goto fail; | |
| 173 | ||
| 174 | rc = fcntl(s, F_GETFD, 0); | |
| 175 | if(rc < 0) | |
| 176 | goto fail; | |
| 177 | ||
| 178 | rc = fcntl(s, F_SETFD, rc | FD_CLOEXEC); | |
| 179 | if(rc < 0) | |
| 180 | goto fail; | |
| 181 | ||
| 182 | memset(&sin6, 0, sizeof(sin6)); | |
| 183 | sin6.sin6_family = AF_INET6; | |
| 184 | sin6.sin6_port = htons(port); | |
| 185 | if(local) { | |
| 186 | rc = inet_pton(AF_INET6, "::1", &sin6.sin6_addr); | |
| 187 | if(rc < 0) | |
| 188 | goto fail; | |
| 189 | } | |
| 190 | rc = bind(s, (struct sockaddr*)&sin6, sizeof(sin6)); | |
| 191 | if(rc < 0) | |
| 192 | goto fail; | |
| 193 | ||
| 194 | rc = listen(s, 2); | |
| 195 | if(rc < 0) | |
| 196 | goto fail; | |
| 197 | ||
| 198 | return s; | |
| 199 | ||
| 200 | fail: | |
| 201 | saved_errno = errno; | |
| 202 | close(s); | |
| 203 | errno = saved_errno; | |
| 204 | return -1; | |
| 205 | } |