/* * various OS-feature replacement utilities * Copyright (c) 2000, 2001, 2002 Fabrice Bellard * copyright (c) 2002 Francois Revol * * This file is part of Libav. * * Libav is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * Libav is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /* needed by inet_aton() */ #define _SVID_SOURCE #include "config.h" #include "avformat.h" #include "os_support.h" #if CONFIG_NETWORK #include <fcntl.h> #if !HAVE_POLL_H #if HAVE_SYS_TIME_H #include <sys/time.h> #endif /* HAVE_SYS_TIME_H */ #if HAVE_WINSOCK2_H #include <winsock2.h> #elif HAVE_SYS_SELECT_H #include <sys/select.h> #endif /* HAVE_WINSOCK2_H */ #endif /* !HAVE_POLL_H */ #include "network.h" #if !HAVE_INET_ATON #include <stdlib.h> int ff_inet_aton(const char *str, struct in_addr *add) { unsigned int add1 = 0, add2 = 0, add3 = 0, add4 = 0; if (sscanf(str, "%d.%d.%d.%d", &add1, &add2, &add3, &add4) != 4) return 0; if (!add1 || (add1 | add2 | add3 | add4) > 255) return 0; add->s_addr = htonl((add1 << 24) + (add2 << 16) + (add3 << 8) + add4); return 1; } #else int ff_inet_aton(const char *str, struct in_addr *add) { return inet_aton(str, add); } #endif /* !HAVE_INET_ATON */ #if !HAVE_GETADDRINFO int ff_getaddrinfo(const char *node, const char *service, const struct addrinfo *hints, struct addrinfo **res) { struct hostent *h = NULL; struct addrinfo *ai; struct sockaddr_in *sin; #if HAVE_WINSOCK2_H int (WSAAPI *win_getaddrinfo)(const char *node, const char *service, const struct addrinfo *hints, struct addrinfo **res); HMODULE ws2mod = GetModuleHandle("ws2_32.dll"); win_getaddrinfo = GetProcAddress(ws2mod, "getaddrinfo"); if (win_getaddrinfo) return win_getaddrinfo(node, service, hints, res); #endif /* HAVE_WINSOCK2_H */ *res = NULL; sin = av_mallocz(sizeof(struct sockaddr_in)); if (!sin) return EAI_FAIL; sin->sin_family = AF_INET; if (node) { if (!ff_inet_aton(node, &sin->sin_addr)) { if (hints && (hints->ai_flags & AI_NUMERICHOST)) { av_free(sin); return EAI_FAIL; } h = gethostbyname(node); if (!h) { av_free(sin); return EAI_FAIL; } memcpy(&sin->sin_addr, h->h_addr_list[0], sizeof(struct in_addr)); } } else { if (hints && (hints->ai_flags & AI_PASSIVE)) sin->sin_addr.s_addr = INADDR_ANY; else sin->sin_addr.s_addr = INADDR_LOOPBACK; } /* Note: getaddrinfo allows service to be a string, which * should be looked up using getservbyname. */ if (service) sin->sin_port = htons(atoi(service)); ai = av_mallocz(sizeof(struct addrinfo)); if (!ai) { av_free(sin); return EAI_FAIL; } *res = ai; ai->ai_family = AF_INET; ai->ai_socktype = hints ? hints->ai_socktype : 0; switch (ai->ai_socktype) { case SOCK_STREAM: ai->ai_protocol = IPPROTO_TCP; break; case SOCK_DGRAM: ai->ai_protocol = IPPROTO_UDP; break; default: ai->ai_protocol = 0; break; } ai->ai_addr = (struct sockaddr *)sin; ai->ai_addrlen = sizeof(struct sockaddr_in); if (hints && (hints->ai_flags & AI_CANONNAME)) ai->ai_canonname = h ? av_strdup(h->h_name) : NULL; ai->ai_next = NULL; return 0; } void ff_freeaddrinfo(struct addrinfo *res) { #if HAVE_WINSOCK2_H void (WSAAPI *win_freeaddrinfo)(struct addrinfo *res); HMODULE ws2mod = GetModuleHandle("ws2_32.dll"); win_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *res)) GetProcAddress(ws2mod, "freeaddrinfo"); if (win_freeaddrinfo) { win_freeaddrinfo(res); return; } #endif /* HAVE_WINSOCK2_H */ av_free(res->ai_canonname); av_free(res->ai_addr); av_free(res); } int ff_getnameinfo(const struct sockaddr *sa, int salen, char *host, int hostlen, char *serv, int servlen, int flags) { const struct sockaddr_in *sin = (const struct sockaddr_in *)sa; #if HAVE_WINSOCK2_H int (WSAAPI *win_getnameinfo)(const struct sockaddr *sa, socklen_t salen, char *host, DWORD hostlen, char *serv, DWORD servlen, int flags); HMODULE ws2mod = GetModuleHandle("ws2_32.dll"); win_getnameinfo = GetProcAddress(ws2mod, "getnameinfo"); if (win_getnameinfo) return win_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags); #endif /* HAVE_WINSOCK2_H */ if (sa->sa_family != AF_INET) return EAI_FAMILY; if (!host && !serv) return EAI_NONAME; if (host && hostlen > 0) { struct hostent *ent = NULL; uint32_t a; if (!(flags & NI_NUMERICHOST)) ent = gethostbyaddr((const char *)&sin->sin_addr, sizeof(sin->sin_addr), AF_INET); if (ent) { snprintf(host, hostlen, "%s", ent->h_name); } else if (flags & NI_NAMERQD) { return EAI_NONAME; } else { a = ntohl(sin->sin_addr.s_addr); snprintf(host, hostlen, "%d.%d.%d.%d", ((a >> 24) & 0xff), ((a >> 16) & 0xff), ((a >> 8) & 0xff), (a & 0xff)); } } if (serv && servlen > 0) { if (!(flags & NI_NUMERICSERV)) return EAI_FAIL; snprintf(serv, servlen, "%d", ntohs(sin->sin_port)); } return 0; } #endif /* !HAVE_GETADDRINFO */ #if !HAVE_GETADDRINFO || HAVE_WINSOCK2_H const char *ff_gai_strerror(int ecode) { switch (ecode) { case EAI_AGAIN: return "Temporary failure in name resolution"; case EAI_BADFLAGS: return "Invalid flags for ai_flags"; case EAI_FAIL: return "A non-recoverable error occurred"; case EAI_FAMILY: return "The address family was not recognized or the address " "length was invalid for the specified family"; case EAI_MEMORY: return "Memory allocation failure"; #if EAI_NODATA != EAI_NONAME case EAI_NODATA: return "No address associated with hostname"; #endif /* EAI_NODATA != EAI_NONAME */ case EAI_NONAME: return "The name does not resolve for the supplied parameters"; case EAI_SERVICE: return "servname not supported for ai_socktype"; case EAI_SOCKTYPE: return "ai_socktype not supported"; } return "Unknown error"; } #endif /* !HAVE_GETADDRINFO || HAVE_WINSOCK2_H */ int ff_socket_nonblock(int socket, int enable) { #if HAVE_WINSOCK2_H u_long param = enable; return ioctlsocket(socket, FIONBIO, ¶m); #else if (enable) return fcntl(socket, F_SETFL, fcntl(socket, F_GETFL) | O_NONBLOCK); else return fcntl(socket, F_SETFL, fcntl(socket, F_GETFL) & ~O_NONBLOCK); #endif /* HAVE_WINSOCK2_H */ } #if !HAVE_POLL_H int ff_poll(struct pollfd *fds, nfds_t numfds, int timeout) { fd_set read_set; fd_set write_set; fd_set exception_set; nfds_t i; int n; int rc; #if HAVE_WINSOCK2_H if (numfds >= FD_SETSIZE) { errno = EINVAL; return -1; } #endif /* HAVE_WINSOCK2_H */ FD_ZERO(&read_set); FD_ZERO(&write_set); FD_ZERO(&exception_set); n = 0; for (i = 0; i < numfds; i++) { if (fds[i].fd < 0) continue; #if !HAVE_WINSOCK2_H if (fds[i].fd >= FD_SETSIZE) { errno = EINVAL; return -1; } #endif /* !HAVE_WINSOCK2_H */ if (fds[i].events & POLLIN) FD_SET(fds[i].fd, &read_set); if (fds[i].events & POLLOUT) FD_SET(fds[i].fd, &write_set); if (fds[i].events & POLLERR) FD_SET(fds[i].fd, &exception_set); if (fds[i].fd >= n) n = fds[i].fd + 1; } if (n == 0) /* Hey!? Nothing to poll, in fact!!! */ return 0; if (timeout < 0) { rc = select(n, &read_set, &write_set, &exception_set, NULL); } else { struct timeval tv; tv.tv_sec = timeout / 1000; tv.tv_usec = 1000 * (timeout % 1000); rc = select(n, &read_set, &write_set, &exception_set, &tv); } if (rc < 0) return rc; for (i = 0; i < numfds; i++) { fds[i].revents = 0; if (FD_ISSET(fds[i].fd, &read_set)) fds[i].revents |= POLLIN; if (FD_ISSET(fds[i].fd, &write_set)) fds[i].revents |= POLLOUT; if (FD_ISSET(fds[i].fd, &exception_set)) fds[i].revents |= POLLERR; } return rc; } #endif /* !HAVE_POLL_H */ #endif /* CONFIG_NETWORK */