Libav 0.7.1
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00001 /* 00002 * Various utilities for ffmpeg system 00003 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard 00004 * copyright (c) 2002 Francois Revol 00005 * 00006 * This file is part of Libav. 00007 * 00008 * Libav is free software; you can redistribute it and/or 00009 * modify it under the terms of the GNU Lesser General Public 00010 * License as published by the Free Software Foundation; either 00011 * version 2.1 of the License, or (at your option) any later version. 00012 * 00013 * Libav is distributed in the hope that it will be useful, 00014 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00015 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00016 * Lesser General Public License for more details. 00017 * 00018 * You should have received a copy of the GNU Lesser General Public 00019 * License along with Libav; if not, write to the Free Software 00020 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00021 */ 00022 00023 /* needed by inet_aton() */ 00024 #define _SVID_SOURCE 00025 00026 #include "config.h" 00027 #include "avformat.h" 00028 #include "os_support.h" 00029 00030 #if defined(_WIN32) && !defined(__MINGW32CE__) 00031 #include <windows.h> 00032 00033 #undef open 00034 int ff_win32_open(const char *filename_utf8, int oflag, int pmode) 00035 { 00036 int fd; 00037 int num_chars; 00038 wchar_t *filename_w; 00039 00040 /* convert UTF-8 to wide chars */ 00041 num_chars = MultiByteToWideChar(CP_UTF8, 0, filename_utf8, -1, NULL, 0); 00042 if (num_chars <= 0) 00043 return -1; 00044 filename_w = av_mallocz(sizeof(wchar_t) * num_chars); 00045 MultiByteToWideChar(CP_UTF8, 0, filename_utf8, -1, filename_w, num_chars); 00046 00047 fd = _wopen(filename_w, oflag, pmode); 00048 av_freep(&filename_w); 00049 00050 /* filename maybe be in CP_ACP */ 00051 if (fd == -1 && !(oflag & O_CREAT)) 00052 return open(filename_utf8, oflag, pmode); 00053 00054 return fd; 00055 } 00056 #endif 00057 00058 #if CONFIG_NETWORK 00059 #include <fcntl.h> 00060 #include <unistd.h> 00061 #if !HAVE_POLL_H 00062 #include <sys/time.h> 00063 #if HAVE_WINSOCK2_H 00064 #include <winsock2.h> 00065 #elif HAVE_SYS_SELECT_H 00066 #include <sys/select.h> 00067 #endif 00068 #endif 00069 00070 #include "network.h" 00071 00072 #if !HAVE_INET_ATON 00073 #include <stdlib.h> 00074 #include <strings.h> 00075 00076 int ff_inet_aton (const char * str, struct in_addr * add) 00077 { 00078 unsigned int add1 = 0, add2 = 0, add3 = 0, add4 = 0; 00079 00080 if (sscanf(str, "%d.%d.%d.%d", &add1, &add2, &add3, &add4) != 4) 00081 return 0; 00082 00083 if (!add1 || (add1|add2|add3|add4) > 255) return 0; 00084 00085 add->s_addr = htonl((add1 << 24) + (add2 << 16) + (add3 << 8) + add4); 00086 00087 return 1; 00088 } 00089 #else 00090 int ff_inet_aton (const char * str, struct in_addr * add) 00091 { 00092 return inet_aton(str, add); 00093 } 00094 #endif /* !HAVE_INET_ATON */ 00095 00096 #if !HAVE_GETADDRINFO 00097 int ff_getaddrinfo(const char *node, const char *service, 00098 const struct addrinfo *hints, struct addrinfo **res) 00099 { 00100 struct hostent *h = NULL; 00101 struct addrinfo *ai; 00102 struct sockaddr_in *sin; 00103 00104 #if HAVE_WINSOCK2_H 00105 int (WSAAPI *win_getaddrinfo)(const char *node, const char *service, 00106 const struct addrinfo *hints, 00107 struct addrinfo **res); 00108 HMODULE ws2mod = GetModuleHandle("ws2_32.dll"); 00109 win_getaddrinfo = GetProcAddress(ws2mod, "getaddrinfo"); 00110 if (win_getaddrinfo) 00111 return win_getaddrinfo(node, service, hints, res); 00112 #endif 00113 00114 *res = NULL; 00115 sin = av_mallocz(sizeof(struct sockaddr_in)); 00116 if (!sin) 00117 return EAI_FAIL; 00118 sin->sin_family = AF_INET; 00119 00120 if (node) { 00121 if (!ff_inet_aton(node, &sin->sin_addr)) { 00122 if (hints && (hints->ai_flags & AI_NUMERICHOST)) { 00123 av_free(sin); 00124 return EAI_FAIL; 00125 } 00126 h = gethostbyname(node); 00127 if (!h) { 00128 av_free(sin); 00129 return EAI_FAIL; 00130 } 00131 memcpy(&sin->sin_addr, h->h_addr_list[0], sizeof(struct in_addr)); 00132 } 00133 } else { 00134 if (hints && (hints->ai_flags & AI_PASSIVE)) { 00135 sin->sin_addr.s_addr = INADDR_ANY; 00136 } else 00137 sin->sin_addr.s_addr = INADDR_LOOPBACK; 00138 } 00139 00140 /* Note: getaddrinfo allows service to be a string, which 00141 * should be looked up using getservbyname. */ 00142 if (service) 00143 sin->sin_port = htons(atoi(service)); 00144 00145 ai = av_mallocz(sizeof(struct addrinfo)); 00146 if (!ai) { 00147 av_free(sin); 00148 return EAI_FAIL; 00149 } 00150 00151 *res = ai; 00152 ai->ai_family = AF_INET; 00153 ai->ai_socktype = hints ? hints->ai_socktype : 0; 00154 switch (ai->ai_socktype) { 00155 case SOCK_STREAM: ai->ai_protocol = IPPROTO_TCP; break; 00156 case SOCK_DGRAM: ai->ai_protocol = IPPROTO_UDP; break; 00157 default: ai->ai_protocol = 0; break; 00158 } 00159 00160 ai->ai_addr = (struct sockaddr *)sin; 00161 ai->ai_addrlen = sizeof(struct sockaddr_in); 00162 if (hints && (hints->ai_flags & AI_CANONNAME)) 00163 ai->ai_canonname = h ? av_strdup(h->h_name) : NULL; 00164 00165 ai->ai_next = NULL; 00166 return 0; 00167 } 00168 00169 void ff_freeaddrinfo(struct addrinfo *res) 00170 { 00171 #if HAVE_WINSOCK2_H 00172 void (WSAAPI *win_freeaddrinfo)(struct addrinfo *res); 00173 HMODULE ws2mod = GetModuleHandle("ws2_32.dll"); 00174 win_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *res)) 00175 GetProcAddress(ws2mod, "freeaddrinfo"); 00176 if (win_freeaddrinfo) { 00177 win_freeaddrinfo(res); 00178 return; 00179 } 00180 #endif 00181 00182 av_free(res->ai_canonname); 00183 av_free(res->ai_addr); 00184 av_free(res); 00185 } 00186 00187 int ff_getnameinfo(const struct sockaddr *sa, int salen, 00188 char *host, int hostlen, 00189 char *serv, int servlen, int flags) 00190 { 00191 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa; 00192 00193 #if HAVE_WINSOCK2_H 00194 int (WSAAPI *win_getnameinfo)(const struct sockaddr *sa, socklen_t salen, 00195 char *host, DWORD hostlen, 00196 char *serv, DWORD servlen, int flags); 00197 HMODULE ws2mod = GetModuleHandle("ws2_32.dll"); 00198 win_getnameinfo = GetProcAddress(ws2mod, "getnameinfo"); 00199 if (win_getnameinfo) 00200 return win_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags); 00201 #endif 00202 00203 if (sa->sa_family != AF_INET) 00204 return EAI_FAMILY; 00205 if (!host && !serv) 00206 return EAI_NONAME; 00207 00208 if (host && hostlen > 0) { 00209 struct hostent *ent = NULL; 00210 uint32_t a; 00211 if (!(flags & NI_NUMERICHOST)) 00212 ent = gethostbyaddr((const char *)&sin->sin_addr, 00213 sizeof(sin->sin_addr), AF_INET); 00214 00215 if (ent) { 00216 snprintf(host, hostlen, "%s", ent->h_name); 00217 } else if (flags & NI_NAMERQD) { 00218 return EAI_NONAME; 00219 } else { 00220 a = ntohl(sin->sin_addr.s_addr); 00221 snprintf(host, hostlen, "%d.%d.%d.%d", 00222 ((a >> 24) & 0xff), ((a >> 16) & 0xff), 00223 ((a >> 8) & 0xff), ( a & 0xff)); 00224 } 00225 } 00226 00227 if (serv && servlen > 0) { 00228 struct servent *ent = NULL; 00229 if (!(flags & NI_NUMERICSERV)) 00230 ent = getservbyport(sin->sin_port, flags & NI_DGRAM ? "udp" : "tcp"); 00231 00232 if (ent) { 00233 snprintf(serv, servlen, "%s", ent->s_name); 00234 } else 00235 snprintf(serv, servlen, "%d", ntohs(sin->sin_port)); 00236 } 00237 00238 return 0; 00239 } 00240 00241 const char *ff_gai_strerror(int ecode) 00242 { 00243 switch(ecode) { 00244 case EAI_FAIL : return "A non-recoverable error occurred"; 00245 case EAI_FAMILY : return "The address family was not recognized or the address length was invalid for the specified family"; 00246 case EAI_NONAME : return "The name does not resolve for the supplied parameters"; 00247 } 00248 00249 return "Unknown error"; 00250 } 00251 #endif 00252 00253 int ff_socket_nonblock(int socket, int enable) 00254 { 00255 #if HAVE_WINSOCK2_H 00256 return ioctlsocket(socket, FIONBIO, &enable); 00257 #else 00258 if (enable) 00259 return fcntl(socket, F_SETFL, fcntl(socket, F_GETFL) | O_NONBLOCK); 00260 else 00261 return fcntl(socket, F_SETFL, fcntl(socket, F_GETFL) & ~O_NONBLOCK); 00262 #endif 00263 } 00264 00265 #if !HAVE_POLL_H 00266 int poll(struct pollfd *fds, nfds_t numfds, int timeout) 00267 { 00268 fd_set read_set; 00269 fd_set write_set; 00270 fd_set exception_set; 00271 nfds_t i; 00272 int n; 00273 int rc; 00274 00275 #if HAVE_WINSOCK2_H 00276 if (numfds >= FD_SETSIZE) { 00277 errno = EINVAL; 00278 return -1; 00279 } 00280 #endif 00281 00282 FD_ZERO(&read_set); 00283 FD_ZERO(&write_set); 00284 FD_ZERO(&exception_set); 00285 00286 n = -1; 00287 for(i = 0; i < numfds; i++) { 00288 if (fds[i].fd < 0) 00289 continue; 00290 #if !HAVE_WINSOCK2_H 00291 if (fds[i].fd >= FD_SETSIZE) { 00292 errno = EINVAL; 00293 return -1; 00294 } 00295 #endif 00296 00297 if (fds[i].events & POLLIN) FD_SET(fds[i].fd, &read_set); 00298 if (fds[i].events & POLLOUT) FD_SET(fds[i].fd, &write_set); 00299 if (fds[i].events & POLLERR) FD_SET(fds[i].fd, &exception_set); 00300 00301 if (fds[i].fd > n) 00302 n = fds[i].fd; 00303 }; 00304 00305 if (n == -1) 00306 /* Hey!? Nothing to poll, in fact!!! */ 00307 return 0; 00308 00309 if (timeout < 0) 00310 rc = select(n+1, &read_set, &write_set, &exception_set, NULL); 00311 else { 00312 struct timeval tv; 00313 00314 tv.tv_sec = timeout / 1000; 00315 tv.tv_usec = 1000 * (timeout % 1000); 00316 rc = select(n+1, &read_set, &write_set, &exception_set, &tv); 00317 }; 00318 00319 if (rc < 0) 00320 return rc; 00321 00322 for(i = 0; i < numfds; i++) { 00323 fds[i].revents = 0; 00324 00325 if (FD_ISSET(fds[i].fd, &read_set)) fds[i].revents |= POLLIN; 00326 if (FD_ISSET(fds[i].fd, &write_set)) fds[i].revents |= POLLOUT; 00327 if (FD_ISSET(fds[i].fd, &exception_set)) fds[i].revents |= POLLERR; 00328 }; 00329 00330 return rc; 00331 } 00332 #endif /* HAVE_POLL_H */ 00333 #endif /* CONFIG_NETWORK */