Mercurial > dovecot > core-2.2
annotate src/lib/network.c @ 2639:a307ddd22a3a HEAD
net_connect() should be nonblocking (currently unused in Dovecot)
| author | Timo Sirainen <tss@iki.fi> |
|---|---|
| date | Sat, 18 Sep 2004 17:37:18 +0300 |
| parents | c5817f302aa6 |
| children | 9cb91ed5a110 |
| rev | line source |
|---|---|
|
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Removed most of the license comments from src/lib/*.c. It's just fine to
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1 /* Copyright (c) 1999-2003 Timo Sirainen */ |
| 0 | 2 |
| 3 #include "lib.h" | |
| 4 #include "network.h" | |
| 5 | |
| 6 #include <unistd.h> | |
| 7 #include <fcntl.h> | |
| 8 #include <ctype.h> | |
| 9 #include <sys/un.h> | |
| 10 #include <netinet/tcp.h> | |
| 11 | |
| 12 #define LISTEN_BACKLOG 8 | |
| 13 | |
| 14 union sockaddr_union { | |
| 15 struct sockaddr sa; | |
| 16 struct sockaddr_in sin; | |
| 17 #ifdef HAVE_IPV6 | |
| 18 struct sockaddr_in6 sin6; | |
| 19 #endif | |
| 20 }; | |
| 21 | |
| 22 #ifdef HAVE_IPV6 | |
| 23 # define SIZEOF_SOCKADDR(so) ((so).sa.sa_family == AF_INET6 ? \ | |
| 24 sizeof(so.sin6) : sizeof(so.sin)) | |
| 25 #else | |
| 26 # define SIZEOF_SOCKADDR(so) (sizeof(so.sin)) | |
| 27 #endif | |
| 28 | |
|
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29 int net_ip_compare(const struct ip_addr *ip1, const struct ip_addr *ip2) |
| 0 | 30 { |
| 31 if (ip1->family != ip2->family) | |
| 32 return 0; | |
| 33 | |
| 34 #ifdef HAVE_IPV6 | |
| 35 if (ip1->family == AF_INET6) | |
| 36 return memcmp(&ip1->ip, &ip2->ip, sizeof(ip1->ip)) == 0; | |
| 37 #endif | |
| 38 | |
| 39 return memcmp(&ip1->ip, &ip2->ip, 4) == 0; | |
| 40 } | |
| 41 | |
| 42 | |
| 43 /* copy IP to sockaddr */ | |
|
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44 static inline void |
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45 sin_set_ip(union sockaddr_union *so, const struct ip_addr *ip) |
| 0 | 46 { |
| 47 if (ip == NULL) { | |
| 48 #ifdef HAVE_IPV6 | |
| 49 so->sin6.sin6_family = AF_INET6; | |
| 50 so->sin6.sin6_addr = in6addr_any; | |
| 51 #else | |
| 52 so->sin.sin_family = AF_INET; | |
| 53 so->sin.sin_addr.s_addr = INADDR_ANY; | |
| 54 #endif | |
| 55 return; | |
| 56 } | |
| 57 | |
| 58 so->sin.sin_family = ip->family; | |
| 59 #ifdef HAVE_IPV6 | |
| 60 if (ip->family == AF_INET6) | |
| 61 memcpy(&so->sin6.sin6_addr, &ip->ip, sizeof(ip->ip)); | |
| 62 else | |
| 63 #endif | |
| 64 memcpy(&so->sin.sin_addr, &ip->ip, 4); | |
| 65 } | |
| 66 | |
|
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67 static inline void |
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68 sin_get_ip(const union sockaddr_union *so, struct ip_addr *ip) |
| 0 | 69 { |
| 70 ip->family = so->sin.sin_family; | |
| 71 | |
| 72 #ifdef HAVE_IPV6 | |
| 73 if (ip->family == AF_INET6) | |
| 74 memcpy(&ip->ip, &so->sin6.sin6_addr, sizeof(ip->ip)); | |
| 75 else | |
| 76 #endif | |
| 77 memcpy(&ip->ip, &so->sin.sin_addr, 4); | |
| 78 } | |
| 79 | |
| 349 | 80 static inline void sin_set_port(union sockaddr_union *so, unsigned int port) |
| 0 | 81 { |
| 82 #ifdef HAVE_IPV6 | |
| 83 if (so->sin.sin_family == AF_INET6) | |
| 84 so->sin6.sin6_port = htons((unsigned short) port); | |
| 85 else | |
| 86 #endif | |
| 87 so->sin.sin_port = htons((unsigned short) port); | |
| 88 } | |
| 89 | |
| 349 | 90 static inline unsigned int sin_get_port(union sockaddr_union *so) |
| 0 | 91 { |
| 92 #ifdef HAVE_IPV6 | |
| 93 if (so->sin.sin_family == AF_INET6) | |
| 94 return ntohs(so->sin6.sin6_port); | |
| 95 #endif | |
| 96 return ntohs(so->sin.sin_port); | |
| 97 } | |
| 98 | |
| 99 static inline void close_save_errno(int fd) | |
| 100 { | |
| 101 int old_errno = errno; | |
|
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102 (void)close(fd); |
| 0 | 103 errno = old_errno; |
| 104 } | |
| 105 | |
| 106 /* Connect to socket with ip address */ | |
|
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107 int net_connect_ip(const struct ip_addr *ip, unsigned int port, |
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108 const struct ip_addr *my_ip) |
| 0 | 109 { |
| 110 union sockaddr_union so; | |
| 111 int fd, ret, opt = 1; | |
| 112 | |
| 113 if (my_ip != NULL && ip->family != my_ip->family) { | |
| 114 i_warning("net_connect_ip(): ip->family != my_ip->family"); | |
| 115 my_ip = NULL; | |
| 116 } | |
| 117 | |
| 118 /* create the socket */ | |
| 119 memset(&so, 0, sizeof(so)); | |
| 120 so.sin.sin_family = ip->family; | |
| 121 fd = socket(ip->family, SOCK_STREAM, 0); | |
| 122 | |
| 123 if (fd == -1) | |
| 124 return -1; | |
| 125 | |
| 126 /* set socket options */ | |
| 127 setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)); | |
| 128 setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &opt, sizeof(opt)); | |
|
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net_connect() should be nonblocking (currently unused in Dovecot)
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129 net_set_nonblock(fd, TRUE); |
| 0 | 130 |
| 131 /* set our own address */ | |
| 132 if (my_ip != NULL) { | |
| 133 sin_set_ip(&so, my_ip); | |
| 134 if (bind(fd, &so.sa, SIZEOF_SOCKADDR(so)) == -1) { | |
| 135 /* failed, set it back to INADDR_ANY */ | |
| 136 sin_set_ip(&so, NULL); | |
| 137 bind(fd, &so.sa, SIZEOF_SOCKADDR(so)); | |
| 138 } | |
| 139 } | |
| 140 | |
| 141 /* connect */ | |
| 142 sin_set_ip(&so, ip); | |
| 143 sin_set_port(&so, port); | |
| 144 ret = connect(fd, &so.sa, SIZEOF_SOCKADDR(so)); | |
| 145 | |
| 146 #ifndef WIN32 | |
| 147 if (ret < 0 && errno != EINPROGRESS) | |
| 148 #else | |
| 149 if (ret < 0 && WSAGetLastError() != WSAEWOULDBLOCK) | |
| 150 #endif | |
| 151 { | |
| 152 close_save_errno(fd); | |
| 153 return -1; | |
| 154 } | |
| 155 | |
| 156 return fd; | |
| 157 } | |
| 158 | |
| 159 int net_connect_unix(const char *path) | |
| 160 { | |
| 161 struct sockaddr_un sa; | |
| 162 int fd, ret; | |
| 163 | |
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164 memset(&sa, 0, sizeof(sa)); |
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165 sa.sun_family = AF_UNIX; |
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166 if (strocpy(sa.sun_path, path, sizeof(sa.sun_path)) < 0) { |
| 0 | 167 /* too long path */ |
| 168 errno = EINVAL; | |
| 169 return -1; | |
| 170 } | |
| 171 | |
| 172 /* create the socket */ | |
| 173 fd = socket(PF_UNIX, SOCK_STREAM, 0); | |
| 174 if (fd == -1) | |
| 175 return -1; | |
| 176 | |
| 177 /* connect */ | |
| 178 ret = connect(fd, (struct sockaddr *) &sa, sizeof(sa)); | |
| 179 if (ret < 0 && errno != EINPROGRESS) { | |
| 180 close_save_errno(fd); | |
| 181 return -1; | |
| 182 } | |
| 183 | |
| 184 return fd; | |
| 185 } | |
| 186 | |
| 187 /* Disconnect socket */ | |
| 188 void net_disconnect(int fd) | |
| 189 { | |
|
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Send error message if close() fails in net_disconnect().
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190 if (close(fd) < 0) |
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191 i_error("net_disconnect() failed: %m"); |
| 0 | 192 } |
| 193 | |
| 194 /* Set socket blocking/nonblocking */ | |
|
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195 void net_set_nonblock(int fd __attr_unused__, int nonblock __attr_unused__) |
| 0 | 196 { |
| 197 #ifdef HAVE_FCNTL | |
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198 int flags; |
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199 |
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200 flags = fcntl(fd, F_GETFL, 0); |
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201 if (flags == -1) |
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202 i_fatal("net_set_nonblock() failed: %m"); |
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203 |
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204 if (nonblock) |
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205 flags |= O_NONBLOCK; |
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206 else |
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207 flags &= ~O_NONBLOCK; |
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208 |
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209 if (fcntl(fd, F_SETFL, flags) < 0) |
| 628 | 210 i_fatal("net_set_nonblock() failed: %m"); |
| 0 | 211 #endif |
| 212 } | |
| 213 | |
|
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214 int net_set_cork(int fd __attr_unused__, int cork __attr_unused__) |
| 0 | 215 { |
| 216 #ifdef TCP_CORK | |
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217 return setsockopt(fd, SOL_TCP, TCP_CORK, &cork, sizeof(cork)); |
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218 #else |
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219 errno = ENOPROTOOPT; |
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220 return -1; |
| 0 | 221 #endif |
| 222 } | |
| 223 | |
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224 void net_get_ip_any4(struct ip_addr *ip) |
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225 { |
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226 struct in_addr *in_ip = (struct in_addr *) &ip->ip; |
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227 |
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228 ip->family = AF_INET; |
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229 in_ip->s_addr = INADDR_ANY; |
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230 } |
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231 |
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232 void net_get_ip_any6(struct ip_addr *ip) |
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233 { |
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234 #ifdef HAVE_IPV6 |
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235 ip->family = AF_INET6; |
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236 ip->ip = in6addr_any; |
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237 #else |
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238 memset(ip, 0, sizeof(struct ip_addr)); |
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239 #endif |
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240 } |
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241 |
| 0 | 242 /* Listen for connections on a socket. if `my_ip' is NULL, listen in any |
| 243 address. */ | |
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244 int net_listen(const struct ip_addr *my_ip, unsigned int *port) |
| 0 | 245 { |
| 246 union sockaddr_union so; | |
| 247 int ret, fd, opt = 1; | |
| 248 socklen_t len; | |
| 249 | |
| 250 i_assert(port != NULL); | |
| 251 | |
| 252 memset(&so, 0, sizeof(so)); | |
| 253 sin_set_port(&so, *port); | |
| 254 sin_set_ip(&so, my_ip); | |
| 255 | |
| 256 /* create the socket */ | |
| 257 fd = socket(so.sin.sin_family, SOCK_STREAM, 0); | |
| 258 #ifdef HAVE_IPV6 | |
| 259 if (fd == -1 && (errno == EINVAL || errno == EAFNOSUPPORT)) { | |
| 260 /* IPv6 is not supported by OS */ | |
| 261 so.sin.sin_family = AF_INET; | |
| 262 so.sin.sin_addr.s_addr = INADDR_ANY; | |
| 263 | |
| 264 fd = socket(AF_INET, SOCK_STREAM, 0); | |
| 265 } | |
| 266 #endif | |
| 267 if (fd == -1) | |
| 268 return -1; | |
| 269 | |
| 270 /* set socket options */ | |
| 271 setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)); | |
| 272 setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &opt, sizeof(opt)); | |
| 273 | |
| 274 /* specify the address/port we want to listen in */ | |
| 275 ret = bind(fd, &so.sa, SIZEOF_SOCKADDR(so)); | |
| 276 if (ret >= 0) { | |
| 277 /* get the actual port we started listen */ | |
| 278 len = SIZEOF_SOCKADDR(so); | |
| 279 ret = getsockname(fd, &so.sa, &len); | |
| 280 if (ret >= 0) { | |
| 281 *port = sin_get_port(&so); | |
| 282 | |
| 283 /* start listening */ | |
| 284 if (listen(fd, LISTEN_BACKLOG) >= 0) | |
| 285 return fd; | |
| 286 } | |
| 287 | |
| 288 } | |
| 289 | |
| 290 /* error */ | |
| 291 close_save_errno(fd); | |
| 292 return -1; | |
| 293 } | |
| 294 | |
| 295 int net_listen_unix(const char *path) | |
| 296 { | |
| 297 struct sockaddr_un sa; | |
| 298 int fd; | |
| 299 | |
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300 memset(&sa, 0, sizeof(sa)); |
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301 sa.sun_family = AF_UNIX; |
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302 if (strocpy(sa.sun_path, path, sizeof(sa.sun_path)) < 0) { |
| 0 | 303 /* too long path */ |
| 304 errno = EINVAL; | |
| 305 return -1; | |
| 306 } | |
| 307 | |
| 308 /* create the socket */ | |
| 309 fd = socket(PF_UNIX, SOCK_STREAM, 0); | |
| 310 if (fd == -1) | |
| 311 return -1; | |
| 312 | |
| 313 /* bind */ | |
| 314 if (bind(fd, (struct sockaddr *) &sa, sizeof(sa)) == 0) { | |
| 315 /* start listening */ | |
| 316 if (listen(fd, LISTEN_BACKLOG) == 0) | |
| 317 return fd; | |
| 318 } | |
| 319 | |
| 320 close_save_errno(fd); | |
| 321 return -1; | |
| 322 } | |
| 323 | |
| 324 /* Accept a connection on a socket */ | |
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325 int net_accept(int fd, struct ip_addr *addr, unsigned int *port) |
| 0 | 326 { |
| 327 union sockaddr_union so; | |
| 328 int ret; | |
| 329 socklen_t addrlen; | |
| 330 | |
| 331 i_assert(fd >= 0); | |
| 332 | |
| 333 addrlen = sizeof(so); | |
| 334 ret = accept(fd, &so.sa, &addrlen); | |
| 335 | |
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336 if (ret < 0) { |
|
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337 if (errno == EBADF || errno == ENOTSOCK || |
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338 errno == EOPNOTSUPP || errno == EFAULT || errno == EINVAL) |
|
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339 return -2; |
|
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340 else |
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341 return -1; |
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342 } |
| 0 | 343 |
| 344 if (addr != NULL) sin_get_ip(&so, addr); | |
| 345 if (port != NULL) *port = sin_get_port(&so); | |
| 346 | |
| 347 return ret; | |
| 348 } | |
| 349 | |
| 350 /* Read data from socket, return number of bytes read, -1 = error */ | |
|
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351 ssize_t net_receive(int fd, void *buf, size_t len) |
| 0 | 352 { |
|
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353 ssize_t ret; |
| 0 | 354 |
| 355 i_assert(fd >= 0); | |
| 356 i_assert(buf != NULL); | |
|
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357 i_assert(len <= SSIZE_T_MAX); |
| 0 | 358 |
| 359 ret = recv(fd, buf, len, 0); | |
|
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360 if (ret == 0) { |
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361 /* disconnected */ |
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362 errno = 0; |
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363 return -2; |
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364 } |
| 0 | 365 |
|
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366 if (ret < 0) { |
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367 if (errno == EINTR || errno == EAGAIN) |
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368 return 0; |
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369 |
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370 if (errno == ECONNRESET || errno == ETIMEDOUT) { |
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371 /* treat as disconnection */ |
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372 return -2; |
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373 } |
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374 } |
| 0 | 375 |
| 376 return ret; | |
| 377 } | |
| 378 | |
| 379 /* Transmit data, return number of bytes sent, -1 = error */ | |
|
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380 ssize_t net_transmit(int fd, const void *data, size_t len) |
| 0 | 381 { |
|
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382 ssize_t ret; |
| 0 | 383 |
| 384 i_assert(fd >= 0); | |
| 385 i_assert(data != NULL); | |
|
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386 i_assert(len <= SSIZE_T_MAX); |
| 0 | 387 |
|
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388 ret = send(fd, data, len, 0); |
|
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389 if (ret == -1 && (errno == EINTR || errno == EAGAIN)) |
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390 return 0; |
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391 |
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392 if (errno == EPIPE) |
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393 return -2; |
| 0 | 394 |
| 395 return ret; | |
| 396 } | |
| 397 | |
| 398 /* Get IP addresses for host. ips contains ips_count of IPs, they don't need | |
| 399 to be free'd. Returns 0 = ok, others = error code for net_gethosterror() */ | |
|
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400 int net_gethostbyname(const char *addr, struct ip_addr **ips, int *ips_count) |
| 0 | 401 { |
|
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402 /* @UNSAFE */ |
| 0 | 403 #ifdef HAVE_IPV6 |
| 404 union sockaddr_union *so; | |
| 405 struct addrinfo hints, *ai, *origai; | |
| 406 char hbuf[NI_MAXHOST]; | |
| 407 int host_error; | |
| 408 #else | |
| 409 struct hostent *hp; | |
| 410 #endif | |
| 411 int count; | |
| 412 | |
| 413 i_assert(addr != NULL); | |
| 414 i_assert(ips != NULL); | |
| 415 i_assert(ips_count != NULL); | |
| 416 | |
| 417 *ips = NULL; | |
| 418 *ips_count = 0; | |
| 419 | |
| 420 #ifdef HAVE_IPV6 | |
| 421 memset(&hints, 0, sizeof(struct addrinfo)); | |
| 422 hints.ai_socktype = SOCK_STREAM; | |
| 423 | |
| 424 /* save error to host_error for later use */ | |
| 425 host_error = getaddrinfo(addr, NULL, &hints, &ai); | |
| 426 if (host_error != 0) | |
| 427 return host_error; | |
| 428 | |
| 429 if (getnameinfo(ai->ai_addr, ai->ai_addrlen, hbuf, | |
| 430 sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0) | |
| 431 return 1; | |
| 432 | |
| 433 | |
| 434 /* get number of IPs */ | |
| 435 origai = ai; | |
| 436 for (count = 0; ai != NULL; ai = ai->ai_next) | |
| 437 count++; | |
| 438 | |
| 439 *ips_count = count; | |
|
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440 *ips = t_malloc(sizeof(struct ip_addr) * count); |
| 0 | 441 |
| 442 count = 0; | |
| 443 for (ai = origai; ai != NULL; ai = ai->ai_next, count++) { | |
| 444 so = (union sockaddr_union *) ai->ai_addr; | |
| 445 | |
|
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446 sin_get_ip(so, &(*ips)[count]); |
| 0 | 447 } |
| 448 freeaddrinfo(origai); | |
| 449 #else | |
| 450 hp = gethostbyname(addr); | |
| 451 if (hp == NULL) | |
| 452 return h_errno; | |
| 453 | |
| 454 /* get number of IPs */ | |
| 455 count = 0; | |
| 456 while (hp->h_addr_list[count] != NULL) | |
| 457 count++; | |
| 458 | |
| 459 *ips_count = count; | |
|
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460 *ips = t_malloc(sizeof(struct ip_addr) * count); |
| 0 | 461 |
| 462 while (count > 0) { | |
| 463 count--; | |
| 464 | |
| 465 (*ips)[count].family = AF_INET; | |
| 466 memcpy(&(*ips)[count].ip, hp->h_addr_list[count], 4); | |
| 467 } | |
| 468 #endif | |
| 469 | |
| 470 return 0; | |
| 471 } | |
| 472 | |
| 473 /* Get socket address/port */ | |
|
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|
474 int net_getsockname(int fd, struct ip_addr *addr, unsigned int *port) |
| 0 | 475 { |
| 476 union sockaddr_union so; | |
| 477 socklen_t addrlen; | |
| 478 | |
| 479 i_assert(fd >= 0); | |
| 480 | |
| 481 addrlen = sizeof(so); | |
| 482 if (getsockname(fd, (struct sockaddr *) &so, &addrlen) == -1) | |
| 483 return -1; | |
| 484 | |
| 485 if (addr != NULL) sin_get_ip(&so, addr); | |
| 486 if (port != NULL) *port = sin_get_port(&so); | |
| 487 | |
| 488 return 0; | |
| 489 } | |
| 490 | |
| 2098 | 491 int net_getpeername(int fd, struct ip_addr *addr, unsigned int *port) |
| 492 { | |
| 493 union sockaddr_union so; | |
| 494 socklen_t addrlen; | |
| 495 | |
| 496 i_assert(fd >= 0); | |
| 497 | |
| 498 addrlen = sizeof(so); | |
| 499 if (getpeername(fd, (struct sockaddr *) &so, &addrlen) == -1) | |
| 500 return -1; | |
| 501 | |
| 502 if (addr != NULL) sin_get_ip(&so, addr); | |
| 503 if (port != NULL) *port = sin_get_port(&so); | |
| 504 | |
| 505 return 0; | |
| 506 } | |
| 507 | |
|
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508 const char *net_ip2addr(const struct ip_addr *ip) |
| 0 | 509 { |
| 510 #ifdef HAVE_IPV6 | |
|
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511 char addr[MAX_IP_LEN+1]; |
|
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512 |
|
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513 addr[MAX_IP_LEN] = '\0'; |
|
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514 if (inet_ntop(ip->family, &ip->ip, addr, MAX_IP_LEN) == NULL) |
|
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515 return NULL; |
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516 |
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517 return t_strdup(addr); |
| 0 | 518 #else |
| 519 unsigned long ip4; | |
| 520 | |
|
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521 if (ip->family != AF_INET) |
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522 return NULL; |
| 0 | 523 |
| 524 ip4 = ntohl(ip->ip.s_addr); | |
|
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525 return t_strdup_printf("%lu.%lu.%lu.%lu", |
|
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526 (ip4 & 0xff000000UL) >> 24, |
|
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527 (ip4 & 0x00ff0000) >> 16, |
|
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528 (ip4 & 0x0000ff00) >> 8, |
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|
529 (ip4 & 0x000000ff)); |
| 0 | 530 #endif |
| 531 } | |
| 532 | |
|
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533 int net_addr2ip(const char *addr, struct ip_addr *ip) |
| 0 | 534 { |
|
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535 if (strchr(addr, ':') != NULL) { |
| 0 | 536 /* IPv6 */ |
| 537 ip->family = AF_INET6; | |
| 538 #ifdef HAVE_IPV6 | |
|
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539 if (inet_pton(AF_INET6, addr, &ip->ip) == 0) |
| 0 | 540 return -1; |
| 541 #else | |
| 542 ip->ip.s_addr = 0; | |
| 543 #endif | |
| 544 } else { | |
| 545 /* IPv4 */ | |
| 546 ip->family = AF_INET; | |
|
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547 if (inet_aton(addr, (struct in_addr *) &ip->ip) == 0) |
| 0 | 548 return -1; |
| 549 } | |
| 550 | |
| 551 return 0; | |
| 552 } | |
| 553 | |
| 554 /* Get socket error */ | |
| 555 int net_geterror(int fd) | |
| 556 { | |
| 557 int data; | |
| 558 socklen_t len = sizeof(data); | |
| 559 | |
| 560 if (getsockopt(fd, SOL_SOCKET, SO_ERROR, &data, &len) == -1) | |
| 561 return -1; | |
| 562 | |
| 563 return data; | |
| 564 } | |
| 565 | |
| 566 /* get error of net_gethostname() */ | |
| 567 const char *net_gethosterror(int error) | |
| 568 { | |
| 569 #ifdef HAVE_IPV6 | |
| 570 i_assert(error != 0); | |
| 571 | |
| 572 if (error == 1) { | |
| 573 /* getnameinfo() failed */ | |
| 574 return strerror(errno); | |
| 575 } | |
| 576 | |
| 577 return gai_strerror(error); | |
| 578 #else | |
| 579 switch (error) { | |
| 580 case HOST_NOT_FOUND: | |
| 581 return "Host not found"; | |
| 582 case NO_ADDRESS: | |
| 583 return "No IP address found for name"; | |
| 584 case NO_RECOVERY: | |
| 585 return "A non-recovable name server error occurred"; | |
| 586 case TRY_AGAIN: | |
| 587 return "A temporary error on an authoritative name server"; | |
| 588 } | |
| 589 | |
| 590 /* unknown error */ | |
| 591 return NULL; | |
| 592 #endif | |
| 593 } | |
| 594 | |
| 595 /* return TRUE if host lookup failed because it didn't exist (ie. not | |
| 596 some error with name server) */ | |
| 597 int net_hosterror_notfound(int error) | |
| 598 { | |
| 599 #ifdef HAVE_IPV6 | |
|
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600 #ifdef EAI_NODATA /* NODATA is depricated */ |
| 0 | 601 return error != 1 && (error == EAI_NONAME || error == EAI_NODATA); |
| 602 #else | |
|
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603 return error != 1 && (error == EAI_NONAME); |
|
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604 #endif |
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605 #else |
| 0 | 606 return error == HOST_NOT_FOUND || error == NO_ADDRESS; |
| 607 #endif | |
| 608 } | |
| 609 | |
| 610 /* Get name of TCP service */ | |
|
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611 const 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 | |
|
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619 int is_ipv4_address(const char *addr) |
| 0 | 620 { |
|
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621 while (*addr != '\0') { |
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622 if (*addr != '.' && !i_isdigit(*addr)) |
| 0 | 623 return 0; |
|
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624 addr++; |
| 0 | 625 } |
| 626 | |
| 627 return 1; | |
| 628 } | |
| 629 | |
|
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630 int is_ipv6_address(const char *addr) |
| 0 | 631 { |
|
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632 while (*addr != '\0') { |
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633 if (*addr != ':' && !i_isxdigit(*addr)) |
| 0 | 634 return 0; |
|
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635 addr++; |
| 0 | 636 } |
| 637 | |
| 638 return 1; | |
| 639 } |