Mercurial > dovecot > core-2.2
annotate src/lib/network.c @ 903:fd8888f6f037 HEAD
Naming style changes, finally got tired of most of the typedefs. Also the
previous enum -> macro change reverted so that we don't use the highest bit
anymore, that's incompatible with old indexes so they will be rebuilt.
| author | Timo Sirainen <tss@iki.fi> |
|---|---|
| date | Sun, 05 Jan 2003 15:09:51 +0200 |
| parents | 35abd7a5d381 |
| children | 0d9f0e617a1a |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 network.c : Network stuff with IPv6 support | |
| 3 | |
| 4 Copyright (c) 1999-2002 Timo Sirainen | |
| 5 | |
| 6 Permission is hereby granted, free of charge, to any person obtaining | |
| 7 a copy of this software and associated documentation files (the | |
| 8 "Software"), to deal in the Software without restriction, including | |
| 9 without limitation the rights to use, copy, modify, merge, publish, | |
| 10 distribute, sublicense, and/or sell copies of the Software, and to | |
| 11 permit persons to whom the Software is furnished to do so, subject to | |
| 12 the following conditions: | |
| 13 | |
| 14 The above copyright notice and this permission notice shall be | |
| 15 included in all copies or substantial portions of the Software. | |
| 16 | |
| 17 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | |
| 18 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
| 19 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. | |
| 20 IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY | |
| 21 CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, | |
| 22 TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE | |
| 23 SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | |
| 24 */ | |
| 25 | |
| 26 #include "lib.h" | |
| 27 #include "network.h" | |
| 28 | |
| 29 #include <unistd.h> | |
| 30 #include <fcntl.h> | |
| 31 #include <ctype.h> | |
| 32 #include <sys/un.h> | |
| 33 #include <netinet/tcp.h> | |
| 34 | |
| 35 #define LISTEN_BACKLOG 8 | |
| 36 | |
| 37 union sockaddr_union { | |
| 38 struct sockaddr sa; | |
| 39 struct sockaddr_in sin; | |
| 40 #ifdef HAVE_IPV6 | |
| 41 struct sockaddr_in6 sin6; | |
| 42 #endif | |
| 43 }; | |
| 44 | |
| 45 #ifdef HAVE_IPV6 | |
| 46 # define SIZEOF_SOCKADDR(so) ((so).sa.sa_family == AF_INET6 ? \ | |
| 47 sizeof(so.sin6) : sizeof(so.sin)) | |
| 48 #else | |
| 49 # define SIZEOF_SOCKADDR(so) (sizeof(so.sin)) | |
| 50 #endif | |
| 51 | |
|
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52 int net_ip_compare(const struct ip_addr *ip1, const struct ip_addr *ip2) |
| 0 | 53 { |
| 54 if (ip1->family != ip2->family) | |
| 55 return 0; | |
| 56 | |
| 57 #ifdef HAVE_IPV6 | |
| 58 if (ip1->family == AF_INET6) | |
| 59 return memcmp(&ip1->ip, &ip2->ip, sizeof(ip1->ip)) == 0; | |
| 60 #endif | |
| 61 | |
| 62 return memcmp(&ip1->ip, &ip2->ip, 4) == 0; | |
| 63 } | |
| 64 | |
| 65 | |
| 66 /* copy IP to sockaddr */ | |
|
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67 static inline void |
|
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68 sin_set_ip(union sockaddr_union *so, const struct ip_addr *ip) |
| 0 | 69 { |
| 70 if (ip == NULL) { | |
| 71 #ifdef HAVE_IPV6 | |
| 72 so->sin6.sin6_family = AF_INET6; | |
| 73 so->sin6.sin6_addr = in6addr_any; | |
| 74 #else | |
| 75 so->sin.sin_family = AF_INET; | |
| 76 so->sin.sin_addr.s_addr = INADDR_ANY; | |
| 77 #endif | |
| 78 return; | |
| 79 } | |
| 80 | |
| 81 so->sin.sin_family = ip->family; | |
| 82 #ifdef HAVE_IPV6 | |
| 83 if (ip->family == AF_INET6) | |
| 84 memcpy(&so->sin6.sin6_addr, &ip->ip, sizeof(ip->ip)); | |
| 85 else | |
| 86 #endif | |
| 87 memcpy(&so->sin.sin_addr, &ip->ip, 4); | |
| 88 } | |
| 89 | |
|
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90 static inline void |
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91 sin_get_ip(const union sockaddr_union *so, struct ip_addr *ip) |
| 0 | 92 { |
| 93 ip->family = so->sin.sin_family; | |
| 94 | |
| 95 #ifdef HAVE_IPV6 | |
| 96 if (ip->family == AF_INET6) | |
| 97 memcpy(&ip->ip, &so->sin6.sin6_addr, sizeof(ip->ip)); | |
| 98 else | |
| 99 #endif | |
| 100 memcpy(&ip->ip, &so->sin.sin_addr, 4); | |
| 101 } | |
| 102 | |
| 349 | 103 static inline void sin_set_port(union sockaddr_union *so, unsigned int port) |
| 0 | 104 { |
| 105 #ifdef HAVE_IPV6 | |
| 106 if (so->sin.sin_family == AF_INET6) | |
| 107 so->sin6.sin6_port = htons((unsigned short) port); | |
| 108 else | |
| 109 #endif | |
| 110 so->sin.sin_port = htons((unsigned short) port); | |
| 111 } | |
| 112 | |
| 349 | 113 static inline unsigned int sin_get_port(union sockaddr_union *so) |
| 0 | 114 { |
| 115 #ifdef HAVE_IPV6 | |
| 116 if (so->sin.sin_family == AF_INET6) | |
| 117 return ntohs(so->sin6.sin6_port); | |
| 118 #endif | |
| 119 return ntohs(so->sin.sin_port); | |
| 120 } | |
| 121 | |
| 122 static inline void close_save_errno(int fd) | |
| 123 { | |
| 124 int old_errno = errno; | |
|
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125 (void)close(fd); |
| 0 | 126 errno = old_errno; |
| 127 } | |
| 128 | |
| 129 /* Connect to socket with ip address */ | |
|
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130 int net_connect_ip(const struct ip_addr *ip, unsigned int port, |
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131 const struct ip_addr *my_ip) |
| 0 | 132 { |
| 133 union sockaddr_union so; | |
| 134 int fd, ret, opt = 1; | |
| 135 | |
| 136 if (my_ip != NULL && ip->family != my_ip->family) { | |
| 137 i_warning("net_connect_ip(): ip->family != my_ip->family"); | |
| 138 my_ip = NULL; | |
| 139 } | |
| 140 | |
| 141 /* create the socket */ | |
| 142 memset(&so, 0, sizeof(so)); | |
| 143 so.sin.sin_family = ip->family; | |
| 144 fd = socket(ip->family, SOCK_STREAM, 0); | |
| 145 | |
| 146 if (fd == -1) | |
| 147 return -1; | |
| 148 | |
| 149 /* set socket options */ | |
| 150 net_set_nonblock(fd, TRUE); | |
| 151 setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)); | |
| 152 setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &opt, sizeof(opt)); | |
| 153 | |
| 154 /* set our own address */ | |
| 155 if (my_ip != NULL) { | |
| 156 sin_set_ip(&so, my_ip); | |
| 157 if (bind(fd, &so.sa, SIZEOF_SOCKADDR(so)) == -1) { | |
| 158 /* failed, set it back to INADDR_ANY */ | |
| 159 sin_set_ip(&so, NULL); | |
| 160 bind(fd, &so.sa, SIZEOF_SOCKADDR(so)); | |
| 161 } | |
| 162 } | |
| 163 | |
| 164 /* connect */ | |
| 165 sin_set_ip(&so, ip); | |
| 166 sin_set_port(&so, port); | |
| 167 ret = connect(fd, &so.sa, SIZEOF_SOCKADDR(so)); | |
| 168 | |
| 169 #ifndef WIN32 | |
| 170 if (ret < 0 && errno != EINPROGRESS) | |
| 171 #else | |
| 172 if (ret < 0 && WSAGetLastError() != WSAEWOULDBLOCK) | |
| 173 #endif | |
| 174 { | |
| 175 close_save_errno(fd); | |
| 176 return -1; | |
| 177 } | |
| 178 | |
| 179 return fd; | |
| 180 } | |
| 181 | |
| 182 int net_connect_unix(const char *path) | |
| 183 { | |
| 184 struct sockaddr_un sa; | |
| 185 int fd, ret; | |
| 186 | |
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187 memset(&sa, 0, sizeof(sa)); |
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188 sa.sun_family = AF_UNIX; |
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189 if (strocpy(sa.sun_path, path, sizeof(sa.sun_path)) < 0) { |
| 0 | 190 /* too long path */ |
| 191 errno = EINVAL; | |
| 192 return -1; | |
| 193 } | |
| 194 | |
| 195 /* create the socket */ | |
| 196 fd = socket(PF_UNIX, SOCK_STREAM, 0); | |
| 197 if (fd == -1) | |
| 198 return -1; | |
| 199 | |
| 200 /* set socket options */ | |
| 201 net_set_nonblock(fd, TRUE); | |
| 202 | |
| 203 /* connect */ | |
| 204 ret = connect(fd, (struct sockaddr *) &sa, sizeof(sa)); | |
| 205 if (ret < 0 && errno != EINPROGRESS) { | |
| 206 close_save_errno(fd); | |
| 207 return -1; | |
| 208 } | |
| 209 | |
| 210 return fd; | |
| 211 } | |
| 212 | |
| 213 /* Disconnect socket */ | |
| 214 void net_disconnect(int fd) | |
| 215 { | |
|
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216 if (close(fd) < 0) |
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217 i_error("net_disconnect() failed: %m"); |
| 0 | 218 } |
| 219 | |
| 220 /* Set socket blocking/nonblocking */ | |
|
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221 void net_set_nonblock(int fd __attr_unused__, int nonblock __attr_unused__) |
| 0 | 222 { |
| 223 #ifdef HAVE_FCNTL | |
| 224 if (fcntl(fd, F_SETFL, nonblock ? O_NONBLOCK : 0) < 0) | |
| 628 | 225 i_fatal("net_set_nonblock() failed: %m"); |
| 0 | 226 #endif |
| 227 } | |
| 228 | |
|
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229 int net_set_cork(int fd __attr_unused__, int cork __attr_unused__) |
| 0 | 230 { |
| 231 #ifdef TCP_CORK | |
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232 return setsockopt(fd, SOL_TCP, TCP_CORK, &cork, sizeof(cork)); |
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233 #else |
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234 errno = ENOPROTOOPT; |
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235 return -1; |
| 0 | 236 #endif |
| 237 } | |
| 238 | |
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239 void net_get_ip_any4(struct ip_addr *ip) |
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240 { |
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241 struct in_addr *in_ip = (struct in_addr *) &ip->ip; |
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242 |
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243 ip->family = AF_INET; |
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244 in_ip->s_addr = INADDR_ANY; |
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245 } |
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246 |
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247 void net_get_ip_any6(struct ip_addr *ip) |
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248 { |
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249 #ifdef HAVE_IPV6 |
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250 ip->family = AF_INET6; |
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251 ip->ip = in6addr_any; |
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252 #else |
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253 memset(ip, 0, sizeof(struct ip_addr)); |
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254 #endif |
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255 } |
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256 |
| 0 | 257 /* Listen for connections on a socket. if `my_ip' is NULL, listen in any |
| 258 address. */ | |
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259 int net_listen(const struct ip_addr *my_ip, unsigned int *port) |
| 0 | 260 { |
| 261 union sockaddr_union so; | |
| 262 int ret, fd, opt = 1; | |
| 263 socklen_t len; | |
| 264 | |
| 265 i_assert(port != NULL); | |
| 266 | |
| 267 memset(&so, 0, sizeof(so)); | |
| 268 sin_set_port(&so, *port); | |
| 269 sin_set_ip(&so, my_ip); | |
| 270 | |
| 271 /* create the socket */ | |
| 272 fd = socket(so.sin.sin_family, SOCK_STREAM, 0); | |
| 273 #ifdef HAVE_IPV6 | |
| 274 if (fd == -1 && (errno == EINVAL || errno == EAFNOSUPPORT)) { | |
| 275 /* IPv6 is not supported by OS */ | |
| 276 so.sin.sin_family = AF_INET; | |
| 277 so.sin.sin_addr.s_addr = INADDR_ANY; | |
| 278 | |
| 279 fd = socket(AF_INET, SOCK_STREAM, 0); | |
| 280 } | |
| 281 #endif | |
| 282 if (fd == -1) | |
| 283 return -1; | |
| 284 | |
| 285 /* set socket options */ | |
| 286 net_set_nonblock(fd, TRUE); | |
| 287 setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)); | |
| 288 setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &opt, sizeof(opt)); | |
| 289 | |
| 290 /* specify the address/port we want to listen in */ | |
| 291 ret = bind(fd, &so.sa, SIZEOF_SOCKADDR(so)); | |
| 292 if (ret >= 0) { | |
| 293 /* get the actual port we started listen */ | |
| 294 len = SIZEOF_SOCKADDR(so); | |
| 295 ret = getsockname(fd, &so.sa, &len); | |
| 296 if (ret >= 0) { | |
| 297 *port = sin_get_port(&so); | |
| 298 | |
| 299 /* start listening */ | |
| 300 if (listen(fd, LISTEN_BACKLOG) >= 0) | |
| 301 return fd; | |
| 302 } | |
| 303 | |
| 304 } | |
| 305 | |
| 306 /* error */ | |
| 307 close_save_errno(fd); | |
| 308 return -1; | |
| 309 } | |
| 310 | |
| 311 int net_listen_unix(const char *path) | |
| 312 { | |
| 313 struct sockaddr_un sa; | |
| 314 int fd; | |
| 315 | |
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316 memset(&sa, 0, sizeof(sa)); |
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317 sa.sun_family = AF_UNIX; |
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318 if (strocpy(sa.sun_path, path, sizeof(sa.sun_path)) < 0) { |
| 0 | 319 /* too long path */ |
| 320 errno = EINVAL; | |
| 321 return -1; | |
| 322 } | |
| 323 | |
| 324 /* create the socket */ | |
| 325 fd = socket(PF_UNIX, SOCK_STREAM, 0); | |
| 326 if (fd == -1) | |
| 327 return -1; | |
| 328 | |
| 329 /* set socket options */ | |
| 330 net_set_nonblock(fd, TRUE); | |
| 331 | |
| 332 /* bind */ | |
| 333 if (bind(fd, (struct sockaddr *) &sa, sizeof(sa)) == 0) { | |
| 334 /* start listening */ | |
| 335 if (listen(fd, LISTEN_BACKLOG) == 0) | |
| 336 return fd; | |
| 337 } | |
| 338 | |
| 339 close_save_errno(fd); | |
| 340 return -1; | |
| 341 } | |
| 342 | |
| 343 /* Accept a connection on a socket */ | |
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344 int net_accept(int fd, struct ip_addr *addr, unsigned int *port) |
| 0 | 345 { |
| 346 union sockaddr_union so; | |
| 347 int ret; | |
| 348 socklen_t addrlen; | |
| 349 | |
| 350 i_assert(fd >= 0); | |
| 351 | |
| 352 addrlen = sizeof(so); | |
| 353 ret = accept(fd, &so.sa, &addrlen); | |
| 354 | |
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355 if (ret < 0) { |
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356 if (errno == EBADF || errno == ENOTSOCK || |
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357 errno == EOPNOTSUPP || errno == EFAULT || errno == EINVAL) |
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358 return -2; |
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359 else |
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360 return -1; |
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361 } |
| 0 | 362 |
| 363 if (addr != NULL) sin_get_ip(&so, addr); | |
| 364 if (port != NULL) *port = sin_get_port(&so); | |
| 365 | |
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366 net_set_nonblock(ret, TRUE); |
| 0 | 367 return ret; |
| 368 } | |
| 369 | |
| 370 /* Read data from socket, return number of bytes read, -1 = error */ | |
|
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371 ssize_t net_receive(int fd, void *buf, size_t len) |
| 0 | 372 { |
|
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373 ssize_t ret; |
| 0 | 374 |
| 375 i_assert(fd >= 0); | |
| 376 i_assert(buf != NULL); | |
|
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377 i_assert(len <= SSIZE_T_MAX); |
| 0 | 378 |
| 379 ret = recv(fd, buf, len, 0); | |
|
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380 if (ret == 0) { |
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381 /* disconnected */ |
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382 errno = 0; |
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383 return -2; |
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384 } |
| 0 | 385 |
|
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386 if (ret < 0) { |
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387 if (errno == EINTR || errno == EAGAIN) |
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388 return 0; |
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389 |
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390 if (errno == ECONNRESET || errno == ETIMEDOUT) { |
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391 /* treat as disconnection */ |
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392 return -2; |
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393 } |
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394 } |
| 0 | 395 |
| 396 return ret; | |
| 397 } | |
| 398 | |
| 399 /* Transmit data, return number of bytes sent, -1 = error */ | |
|
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400 ssize_t net_transmit(int fd, const void *data, size_t len) |
| 0 | 401 { |
|
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402 ssize_t ret; |
| 0 | 403 |
| 404 i_assert(fd >= 0); | |
| 405 i_assert(data != NULL); | |
|
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406 i_assert(len <= SSIZE_T_MAX); |
| 0 | 407 |
|
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408 ret = send(fd, data, len, 0); |
|
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409 if (ret == -1 && (errno == EINTR || errno == EAGAIN)) |
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410 return 0; |
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411 |
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412 if (errno == EPIPE) |
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413 return -2; |
| 0 | 414 |
| 415 return ret; | |
| 416 } | |
| 417 | |
| 418 /* Get IP addresses for host. ips contains ips_count of IPs, they don't need | |
| 419 to be free'd. Returns 0 = ok, others = error code for net_gethosterror() */ | |
|
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420 int net_gethostbyname(const char *addr, struct ip_addr **ips, int *ips_count) |
| 0 | 421 { |
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422 /* @UNSAFE */ |
| 0 | 423 #ifdef HAVE_IPV6 |
| 424 union sockaddr_union *so; | |
| 425 struct addrinfo hints, *ai, *origai; | |
| 426 char hbuf[NI_MAXHOST]; | |
| 427 int host_error; | |
| 428 #else | |
| 429 struct hostent *hp; | |
| 430 #endif | |
| 431 int count; | |
| 432 | |
| 433 i_assert(addr != NULL); | |
| 434 i_assert(ips != NULL); | |
| 435 i_assert(ips_count != NULL); | |
| 436 | |
| 437 *ips = NULL; | |
| 438 *ips_count = 0; | |
| 439 | |
| 440 #ifdef HAVE_IPV6 | |
| 441 memset(&hints, 0, sizeof(struct addrinfo)); | |
| 442 hints.ai_socktype = SOCK_STREAM; | |
| 443 | |
| 444 /* save error to host_error for later use */ | |
| 445 host_error = getaddrinfo(addr, NULL, &hints, &ai); | |
| 446 if (host_error != 0) | |
| 447 return host_error; | |
| 448 | |
| 449 if (getnameinfo(ai->ai_addr, ai->ai_addrlen, hbuf, | |
| 450 sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0) | |
| 451 return 1; | |
| 452 | |
| 453 | |
| 454 /* get number of IPs */ | |
| 455 origai = ai; | |
| 456 for (count = 0; ai != NULL; ai = ai->ai_next) | |
| 457 count++; | |
| 458 | |
| 459 *ips_count = count; | |
|
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460 *ips = t_malloc(sizeof(struct ip_addr) * count); |
| 0 | 461 |
| 462 count = 0; | |
| 463 for (ai = origai; ai != NULL; ai = ai->ai_next, count++) { | |
| 464 so = (union sockaddr_union *) ai->ai_addr; | |
| 465 | |
| 466 sin_get_ip(so, ips[count]); | |
| 467 } | |
| 468 freeaddrinfo(origai); | |
| 469 #else | |
| 470 hp = gethostbyname(addr); | |
| 471 if (hp == NULL) | |
| 472 return h_errno; | |
| 473 | |
| 474 /* get number of IPs */ | |
| 475 count = 0; | |
| 476 while (hp->h_addr_list[count] != NULL) | |
| 477 count++; | |
| 478 | |
| 479 *ips_count = count; | |
|
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480 *ips = t_malloc(sizeof(struct ip_addr) * count); |
| 0 | 481 |
| 482 while (count > 0) { | |
| 483 count--; | |
| 484 | |
| 485 (*ips)[count].family = AF_INET; | |
| 486 memcpy(&(*ips)[count].ip, hp->h_addr_list[count], 4); | |
| 487 } | |
| 488 #endif | |
| 489 | |
| 490 return 0; | |
| 491 } | |
| 492 | |
| 493 /* Get socket address/port */ | |
|
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494 int net_getsockname(int fd, struct ip_addr *addr, unsigned int *port) |
| 0 | 495 { |
| 496 union sockaddr_union so; | |
| 497 socklen_t addrlen; | |
| 498 | |
| 499 i_assert(fd >= 0); | |
| 500 | |
| 501 addrlen = sizeof(so); | |
| 502 if (getsockname(fd, (struct sockaddr *) &so, &addrlen) == -1) | |
| 503 return -1; | |
| 504 | |
| 505 if (addr != NULL) sin_get_ip(&so, addr); | |
| 506 if (port != NULL) *port = sin_get_port(&so); | |
| 507 | |
| 508 return 0; | |
| 509 } | |
| 510 | |
|
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511 const char *net_ip2host(const struct ip_addr *ip) |
| 0 | 512 { |
| 513 #ifdef HAVE_IPV6 | |
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514 char host[MAX_IP_LEN+1]; |
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515 |
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516 host[MAX_IP_LEN] = '\0'; |
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517 if (inet_ntop(ip->family, &ip->ip, host, MAX_IP_LEN) == NULL) |
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518 return NULL; |
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519 |
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520 return t_strdup(host); |
| 0 | 521 #else |
| 522 unsigned long ip4; | |
| 523 | |
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524 if (ip->family != AF_INET) |
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525 return NULL; |
| 0 | 526 |
| 527 ip4 = ntohl(ip->ip.s_addr); | |
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528 return t_strdup_printf("%lu.%lu.%lu.%lu", |
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529 (ip4 & 0xff000000UL) >> 24, |
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530 (ip4 & 0x00ff0000) >> 16, |
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531 (ip4 & 0x0000ff00) >> 8, |
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532 (ip4 & 0x000000ff)); |
| 0 | 533 #endif |
| 534 return 0; | |
| 535 } | |
| 536 | |
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537 int net_host2ip(const char *host, struct ip_addr *ip) |
| 0 | 538 { |
| 539 if (strchr(host, ':') != NULL) { | |
| 540 /* IPv6 */ | |
| 541 ip->family = AF_INET6; | |
| 542 #ifdef HAVE_IPV6 | |
| 543 if (inet_pton(AF_INET6, host, &ip->ip) == 0) | |
| 544 return -1; | |
| 545 #else | |
| 546 ip->ip.s_addr = 0; | |
| 547 #endif | |
| 548 } else { | |
| 549 /* IPv4 */ | |
| 550 ip->family = AF_INET; | |
| 551 if (inet_aton(host, (struct in_addr *) &ip->ip) == 0) | |
| 552 return -1; | |
| 553 } | |
| 554 | |
| 555 return 0; | |
| 556 } | |
| 557 | |
| 558 /* Get socket error */ | |
| 559 int net_geterror(int fd) | |
| 560 { | |
| 561 int data; | |
| 562 socklen_t len = sizeof(data); | |
| 563 | |
| 564 if (getsockopt(fd, SOL_SOCKET, SO_ERROR, &data, &len) == -1) | |
| 565 return -1; | |
| 566 | |
| 567 return data; | |
| 568 } | |
| 569 | |
| 570 /* get error of net_gethostname() */ | |
| 571 const char *net_gethosterror(int error) | |
| 572 { | |
| 573 #ifdef HAVE_IPV6 | |
| 574 i_assert(error != 0); | |
| 575 | |
| 576 if (error == 1) { | |
| 577 /* getnameinfo() failed */ | |
| 578 return strerror(errno); | |
| 579 } | |
| 580 | |
| 581 return gai_strerror(error); | |
| 582 #else | |
| 583 switch (error) { | |
| 584 case HOST_NOT_FOUND: | |
| 585 return "Host not found"; | |
| 586 case NO_ADDRESS: | |
| 587 return "No IP address found for name"; | |
| 588 case NO_RECOVERY: | |
| 589 return "A non-recovable name server error occurred"; | |
| 590 case TRY_AGAIN: | |
| 591 return "A temporary error on an authoritative name server"; | |
| 592 } | |
| 593 | |
| 594 /* unknown error */ | |
| 595 return NULL; | |
| 596 #endif | |
| 597 } | |
| 598 | |
| 599 /* return TRUE if host lookup failed because it didn't exist (ie. not | |
| 600 some error with name server) */ | |
| 601 int net_hosterror_notfound(int error) | |
| 602 { | |
| 603 #ifdef HAVE_IPV6 | |
| 604 return error != 1 && (error == EAI_NONAME || error == EAI_NODATA); | |
| 605 #else | |
| 606 return error == HOST_NOT_FOUND || error == NO_ADDRESS; | |
| 607 #endif | |
| 608 } | |
| 609 | |
| 610 /* Get name of TCP service */ | |
| 349 | 611 char *net_getservbyport(unsigned short port) |
| 0 | 612 { |
| 613 struct servent *entry; | |
| 614 | |
| 349 | 615 entry = getservbyport(htons(port), "tcp"); |
| 0 | 616 return entry == NULL ? NULL : entry->s_name; |
| 617 } | |
| 618 | |
| 619 int is_ipv4_address(const char *host) | |
| 620 { | |
| 621 while (*host != '\0') { | |
| 622 if (*host != '.' && !i_isdigit(*host)) | |
| 623 return 0; | |
| 624 host++; | |
| 625 } | |
| 626 | |
| 627 return 1; | |
| 628 } | |
| 629 | |
| 630 int is_ipv6_address(const char *host) | |
| 631 { | |
| 632 while (*host != '\0') { | |
| 633 if (*host != ':' && !i_isxdigit(*host)) | |
| 634 return 0; | |
| 635 host++; | |
| 636 } | |
| 637 | |
| 638 return 1; | |
| 639 } |