1/* 2 * Various utilities for ffmpeg system 3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard 4 * copyright (c) 2002 Francois Revol 5 * 6 * This file is part of FFmpeg. 7 * 8 * FFmpeg is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU Lesser General Public 10 * License as published by the Free Software Foundation; either 11 * version 2.1 of the License, or (at your option) any later version. 12 * 13 * FFmpeg is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * Lesser General Public License for more details. 17 * 18 * You should have received a copy of the GNU Lesser General Public 19 * License along with FFmpeg; if not, write to the Free Software 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 21 */ 22 23/* needed by inet_aton() */ 24#define _SVID_SOURCE 25#define _DARWIN_C_SOURCE 26 27#include "config.h" 28#include "avformat.h" 29#include <unistd.h> 30#include <fcntl.h> 31#include <sys/time.h> 32#include "os_support.h" 33 34#if CONFIG_NETWORK 35#if !HAVE_POLL_H 36#if HAVE_WINSOCK2_H 37#include <winsock2.h> 38#elif HAVE_SYS_SELECT_H 39#include <sys/select.h> 40#endif 41#endif 42 43#include "network.h" 44 45#if !HAVE_INET_ATON 46#include <stdlib.h> 47#include <strings.h> 48 49int ff_inet_aton (const char * str, struct in_addr * add) 50{ 51 unsigned int add1 = 0, add2 = 0, add3 = 0, add4 = 0; 52 53 if (sscanf(str, "%d.%d.%d.%d", &add1, &add2, &add3, &add4) != 4) 54 return 0; 55 56 if (!add1 || (add1|add2|add3|add4) > 255) return 0; 57 58 add->s_addr = htonl((add1 << 24) + (add2 << 16) + (add3 << 8) + add4); 59 60 return 1; 61} 62#else 63int ff_inet_aton (const char * str, struct in_addr * add) 64{ 65 return inet_aton(str, add); 66} 67#endif /* !HAVE_INET_ATON */ 68 69#if !HAVE_GETADDRINFO 70int ff_getaddrinfo(const char *node, const char *service, 71 const struct addrinfo *hints, struct addrinfo **res) 72{ 73 struct hostent *h = NULL; 74 struct addrinfo *ai; 75 struct sockaddr_in *sin; 76 77#if HAVE_WINSOCK2_H 78 int (WSAAPI *win_getaddrinfo)(const char *node, const char *service, 79 const struct addrinfo *hints, 80 struct addrinfo **res); 81 HMODULE ws2mod = GetModuleHandle("ws2_32.dll"); 82 win_getaddrinfo = GetProcAddress(ws2mod, "getaddrinfo"); 83 if (win_getaddrinfo) 84 return win_getaddrinfo(node, service, hints, res); 85#endif 86 87 *res = NULL; 88 sin = av_mallocz(sizeof(struct sockaddr_in)); 89 if (!sin) 90 return EAI_FAIL; 91 sin->sin_family = AF_INET; 92 93 if (node) { 94 if (!ff_inet_aton(node, &sin->sin_addr)) { 95 if (hints && (hints->ai_flags & AI_NUMERICHOST)) { 96 av_free(sin); 97 return EAI_FAIL; 98 } 99 h = gethostbyname(node); 100 if (!h) { 101 av_free(sin); 102 return EAI_FAIL; 103 } 104 memcpy(&sin->sin_addr, h->h_addr_list[0], sizeof(struct in_addr)); 105 } 106 } else { 107 if (hints && (hints->ai_flags & AI_PASSIVE)) { 108 sin->sin_addr.s_addr = INADDR_ANY; 109 } else 110 sin->sin_addr.s_addr = INADDR_LOOPBACK; 111 } 112 113 /* Note: getaddrinfo allows service to be a string, which 114 * should be looked up using getservbyname. */ 115 if (service) 116 sin->sin_port = htons(atoi(service)); 117 118 ai = av_mallocz(sizeof(struct addrinfo)); 119 if (!ai) { 120 av_free(sin); 121 return EAI_FAIL; 122 } 123 124 *res = ai; 125 ai->ai_family = AF_INET; 126 ai->ai_socktype = hints ? hints->ai_socktype : 0; 127 switch (ai->ai_socktype) { 128 case SOCK_STREAM: ai->ai_protocol = IPPROTO_TCP; break; 129 case SOCK_DGRAM: ai->ai_protocol = IPPROTO_UDP; break; 130 default: ai->ai_protocol = 0; break; 131 } 132 133 ai->ai_addr = (struct sockaddr *)sin; 134 ai->ai_addrlen = sizeof(struct sockaddr_in); 135 if (hints && (hints->ai_flags & AI_CANONNAME)) 136 ai->ai_canonname = h ? av_strdup(h->h_name) : NULL; 137 138 ai->ai_next = NULL; 139 return 0; 140} 141 142void ff_freeaddrinfo(struct addrinfo *res) 143{ 144#if HAVE_WINSOCK2_H 145 void (WSAAPI *win_freeaddrinfo)(struct addrinfo *res); 146 HMODULE ws2mod = GetModuleHandle("ws2_32.dll"); 147 win_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *res)) 148 GetProcAddress(ws2mod, "freeaddrinfo"); 149 if (win_freeaddrinfo) { 150 win_freeaddrinfo(res); 151 return; 152 } 153#endif 154 155 av_free(res->ai_canonname); 156 av_free(res->ai_addr); 157 av_free(res); 158} 159 160int ff_getnameinfo(const struct sockaddr *sa, int salen, 161 char *host, int hostlen, 162 char *serv, int servlen, int flags) 163{ 164 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa; 165 166#if HAVE_WINSOCK2_H 167 int (WSAAPI *win_getnameinfo)(const struct sockaddr *sa, socklen_t salen, 168 char *host, DWORD hostlen, 169 char *serv, DWORD servlen, int flags); 170 HMODULE ws2mod = GetModuleHandle("ws2_32.dll"); 171 win_getnameinfo = GetProcAddress(ws2mod, "getnameinfo"); 172 if (win_getnameinfo) 173 return win_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags); 174#endif 175 176 if (sa->sa_family != AF_INET) 177 return EAI_FAMILY; 178 if (!host && !serv) 179 return EAI_NONAME; 180 181 if (host && hostlen > 0) { 182 struct hostent *ent = NULL; 183 uint32_t a; 184 if (!(flags & NI_NUMERICHOST)) 185 ent = gethostbyaddr((const char *)&sin->sin_addr, 186 sizeof(sin->sin_addr), AF_INET); 187 188 if (ent) { 189 snprintf(host, hostlen, "%s", ent->h_name); 190 } else if (flags & NI_NAMERQD) { 191 return EAI_NONAME; 192 } else { 193 a = ntohl(sin->sin_addr.s_addr); 194 snprintf(host, hostlen, "%d.%d.%d.%d", 195 ((a >> 24) & 0xff), ((a >> 16) & 0xff), 196 ((a >> 8) & 0xff), ( a & 0xff)); 197 } 198 } 199 200 if (serv && servlen > 0) { 201 struct servent *ent = NULL; 202 if (!(flags & NI_NUMERICSERV)) 203 ent = getservbyport(sin->sin_port, flags & NI_DGRAM ? "udp" : "tcp"); 204 205 if (ent) { 206 snprintf(serv, servlen, "%s", ent->s_name); 207 } else 208 snprintf(serv, servlen, "%d", ntohs(sin->sin_port)); 209 } 210 211 return 0; 212} 213 214const char *ff_gai_strerror(int ecode) 215{ 216 switch(ecode) { 217 case EAI_FAIL : return "A non-recoverable error occurred"; 218 case EAI_FAMILY : return "The address family was not recognized or the address length was invalid for the specified family"; 219 case EAI_NONAME : return "The name does not resolve for the supplied parameters"; 220 } 221 222 return "Unknown error"; 223} 224#endif 225 226int ff_socket_nonblock(int socket, int enable) 227{ 228#if HAVE_WINSOCK2_H 229 return ioctlsocket(socket, FIONBIO, &enable); 230#else 231 if (enable) 232 return fcntl(socket, F_SETFL, fcntl(socket, F_GETFL) | O_NONBLOCK); 233 else 234 return fcntl(socket, F_SETFL, fcntl(socket, F_GETFL) & ~O_NONBLOCK); 235#endif 236} 237#endif /* CONFIG_NETWORK */ 238 239#if CONFIG_FFSERVER 240#if !HAVE_POLL_H 241int poll(struct pollfd *fds, nfds_t numfds, int timeout) 242{ 243 fd_set read_set; 244 fd_set write_set; 245 fd_set exception_set; 246 nfds_t i; 247 int n; 248 int rc; 249 250#if HAVE_WINSOCK2_H 251 if (numfds >= FD_SETSIZE) { 252 errno = EINVAL; 253 return -1; 254 } 255#endif 256 257 FD_ZERO(&read_set); 258 FD_ZERO(&write_set); 259 FD_ZERO(&exception_set); 260 261 n = -1; 262 for(i = 0; i < numfds; i++) { 263 if (fds[i].fd < 0) 264 continue; 265#if !HAVE_WINSOCK2_H 266 if (fds[i].fd >= FD_SETSIZE) { 267 errno = EINVAL; 268 return -1; 269 } 270#endif 271 272 if (fds[i].events & POLLIN) FD_SET(fds[i].fd, &read_set); 273 if (fds[i].events & POLLOUT) FD_SET(fds[i].fd, &write_set); 274 if (fds[i].events & POLLERR) FD_SET(fds[i].fd, &exception_set); 275 276 if (fds[i].fd > n) 277 n = fds[i].fd; 278 }; 279 280 if (n == -1) 281 /* Hey!? Nothing to poll, in fact!!! */ 282 return 0; 283 284 if (timeout < 0) 285 rc = select(n+1, &read_set, &write_set, &exception_set, NULL); 286 else { 287 struct timeval tv; 288 289 tv.tv_sec = timeout / 1000; 290 tv.tv_usec = 1000 * (timeout % 1000); 291 rc = select(n+1, &read_set, &write_set, &exception_set, &tv); 292 }; 293 294 if (rc < 0) 295 return rc; 296 297 for(i = 0; i < (nfds_t) n; i++) { 298 fds[i].revents = 0; 299 300 if (FD_ISSET(fds[i].fd, &read_set)) fds[i].revents |= POLLIN; 301 if (FD_ISSET(fds[i].fd, &write_set)) fds[i].revents |= POLLOUT; 302 if (FD_ISSET(fds[i].fd, &exception_set)) fds[i].revents |= POLLERR; 303 }; 304 305 return rc; 306} 307#endif /* HAVE_POLL_H */ 308#endif /* CONFIG_FFSERVER */ 309 310