| /* | |
| * Copyright (c) 2007 The FFmpeg Project | |
| * | |
| * This file is part of FFmpeg. | |
| * | |
| * FFmpeg 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. | |
| * | |
| * FFmpeg 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 FFmpeg; if not, write to the Free Software | |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| */ | |
| #include "config_components.h" | |
| #include <fcntl.h> | |
| #include "network.h" | |
| #include "tls.h" | |
| #include "url.h" | |
| #include "libavutil/avassert.h" | |
| #include "libavutil/mem.h" | |
| #include "libavutil/time.h" | |
| int ff_tls_init(void) | |
| { | |
| #if CONFIG_TLS_PROTOCOL | |
| #if CONFIG_OPENSSL | |
| int ret; | |
| if ((ret = ff_openssl_init()) < 0) | |
| return ret; | |
| #endif | |
| #if CONFIG_GNUTLS | |
| ff_gnutls_init(); | |
| #endif | |
| #endif | |
| return 0; | |
| } | |
| void ff_tls_deinit(void) | |
| { | |
| #if CONFIG_TLS_PROTOCOL | |
| #if CONFIG_OPENSSL | |
| ff_openssl_deinit(); | |
| #endif | |
| #if CONFIG_GNUTLS | |
| ff_gnutls_deinit(); | |
| #endif | |
| #endif | |
| } | |
| int ff_network_init(void) | |
| { | |
| #if HAVE_WINSOCK2_H | |
| WSADATA wsaData; | |
| if (WSAStartup(MAKEWORD(1,1), &wsaData)) | |
| return 0; | |
| #endif | |
| return 1; | |
| } | |
| int ff_network_wait_fd(int fd, int write) | |
| { | |
| int ev = write ? POLLOUT : POLLIN; | |
| struct pollfd p = { .fd = fd, .events = ev, .revents = 0 }; | |
| int ret; | |
| ret = poll(&p, 1, POLLING_TIME); | |
| return ret < 0 ? ff_neterrno() : p.revents & (ev | POLLERR | POLLHUP) ? 0 : AVERROR(EAGAIN); | |
| } | |
| int ff_network_wait_fd_timeout(int fd, int write, int64_t timeout, AVIOInterruptCB *int_cb) | |
| { | |
| int ret; | |
| int64_t wait_start = 0; | |
| while (1) { | |
| if (ff_check_interrupt(int_cb)) | |
| return AVERROR_EXIT; | |
| ret = ff_network_wait_fd(fd, write); | |
| if (ret != AVERROR(EAGAIN)) | |
| return ret; | |
| if (timeout > 0) { | |
| if (!wait_start) | |
| wait_start = av_gettime_relative(); | |
| else if (av_gettime_relative() - wait_start > timeout) | |
| return AVERROR(ETIMEDOUT); | |
| } | |
| } | |
| } | |
| int ff_network_sleep_interruptible(int64_t timeout, AVIOInterruptCB *int_cb) | |
| { | |
| int64_t wait_start = av_gettime_relative(); | |
| while (1) { | |
| int64_t time_left; | |
| if (ff_check_interrupt(int_cb)) | |
| return AVERROR_EXIT; | |
| time_left = timeout - (av_gettime_relative() - wait_start); | |
| if (time_left <= 0) | |
| return AVERROR(ETIMEDOUT); | |
| av_usleep(FFMIN(time_left, POLLING_TIME * 1000)); | |
| } | |
| } | |
| void ff_network_close(void) | |
| { | |
| #if HAVE_WINSOCK2_H | |
| WSACleanup(); | |
| #endif | |
| } | |
| #if HAVE_WINSOCK2_H | |
| int ff_neterrno(void) | |
| { | |
| int err = WSAGetLastError(); | |
| switch (err) { | |
| case WSAEWOULDBLOCK: | |
| return AVERROR(EAGAIN); | |
| case WSAEINTR: | |
| return AVERROR(EINTR); | |
| case WSAEPROTONOSUPPORT: | |
| return AVERROR(EPROTONOSUPPORT); | |
| case WSAETIMEDOUT: | |
| return AVERROR(ETIMEDOUT); | |
| case WSAECONNREFUSED: | |
| return AVERROR(ECONNREFUSED); | |
| case WSAEINPROGRESS: | |
| return AVERROR(EINPROGRESS); | |
| } | |
| return -err; | |
| } | |
| #endif | |
| int ff_is_multicast_address(struct sockaddr *addr) | |
| { | |
| if (addr->sa_family == AF_INET) { | |
| return IN_MULTICAST(ntohl(((struct sockaddr_in *)addr)->sin_addr.s_addr)); | |
| } | |
| #if HAVE_STRUCT_SOCKADDR_IN6 | |
| if (addr->sa_family == AF_INET6) { | |
| return IN6_IS_ADDR_MULTICAST(&((struct sockaddr_in6 *)addr)->sin6_addr); | |
| } | |
| #endif | |
| return 0; | |
| } | |
| static int ff_poll_interrupt(struct pollfd *p, nfds_t nfds, int timeout, | |
| AVIOInterruptCB *cb) | |
| { | |
| int runs = timeout / POLLING_TIME; | |
| int ret = 0; | |
| do { | |
| if (ff_check_interrupt(cb)) | |
| return AVERROR_EXIT; | |
| ret = poll(p, nfds, POLLING_TIME); | |
| if (ret != 0) { | |
| if (ret < 0) | |
| ret = ff_neterrno(); | |
| if (ret == AVERROR(EINTR)) | |
| continue; | |
| break; | |
| } | |
| } while (timeout <= 0 || runs-- > 0); | |
| if (!ret) | |
| return AVERROR(ETIMEDOUT); | |
| return ret; | |
| } | |
| int ff_socket(int af, int type, int proto, void *logctx) | |
| { | |
| int fd; | |
| #ifdef SOCK_CLOEXEC | |
| fd = socket(af, type | SOCK_CLOEXEC, proto); | |
| if (fd == -1 && errno == EINVAL) | |
| #endif | |
| { | |
| fd = socket(af, type, proto); | |
| #if HAVE_FCNTL | |
| if (fd != -1) { | |
| if (fcntl(fd, F_SETFD, FD_CLOEXEC) == -1) | |
| av_log(logctx, AV_LOG_DEBUG, "Failed to set close on exec\n"); | |
| } | |
| #endif | |
| } | |
| #ifdef SO_NOSIGPIPE | |
| if (fd != -1) { | |
| if (setsockopt(fd, SOL_SOCKET, SO_NOSIGPIPE, &(int){1}, sizeof(int))) { | |
| av_log(logctx, AV_LOG_WARNING, "setsockopt(SO_NOSIGPIPE) failed\n"); | |
| } | |
| } | |
| #endif | |
| return fd; | |
| } | |
| int ff_listen(int fd, const struct sockaddr *addr, | |
| socklen_t addrlen, void *logctx) | |
| { | |
| int ret; | |
| int reuse = 1; | |
| if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse))) { | |
| av_log(logctx, AV_LOG_WARNING, "setsockopt(SO_REUSEADDR) failed\n"); | |
| } | |
| ret = bind(fd, addr, addrlen); | |
| if (ret) | |
| return ff_neterrno(); | |
| ret = listen(fd, 1); | |
| if (ret) | |
| return ff_neterrno(); | |
| return ret; | |
| } | |
| int ff_accept(int fd, int timeout, URLContext *h) | |
| { | |
| int ret; | |
| struct pollfd lp = { fd, POLLIN, 0 }; | |
| ret = ff_poll_interrupt(&lp, 1, timeout, &h->interrupt_callback); | |
| if (ret < 0) | |
| return ret; | |
| ret = accept(fd, NULL, NULL); | |
| if (ret < 0) | |
| return ff_neterrno(); | |
| if (ff_socket_nonblock(ret, 1) < 0) | |
| av_log(h, AV_LOG_DEBUG, "ff_socket_nonblock failed\n"); | |
| return ret; | |
| } | |
| int ff_listen_bind(int fd, const struct sockaddr *addr, | |
| socklen_t addrlen, int timeout, URLContext *h) | |
| { | |
| int ret; | |
| if ((ret = ff_listen(fd, addr, addrlen, h)) < 0) | |
| return ret; | |
| if ((ret = ff_accept(fd, timeout, h)) < 0) | |
| return ret; | |
| closesocket(fd); | |
| return ret; | |
| } | |
| int ff_listen_connect(int fd, const struct sockaddr *addr, | |
| socklen_t addrlen, int timeout, URLContext *h, | |
| int will_try_next) | |
| { | |
| struct pollfd p = {fd, POLLOUT, 0}; | |
| int ret; | |
| socklen_t optlen; | |
| if (ff_socket_nonblock(fd, 1) < 0) | |
| av_log(h, AV_LOG_DEBUG, "ff_socket_nonblock failed\n"); | |
| while ((ret = connect(fd, addr, addrlen))) { | |
| ret = ff_neterrno(); | |
| switch (ret) { | |
| case AVERROR(EINTR): | |
| if (ff_check_interrupt(&h->interrupt_callback)) | |
| return AVERROR_EXIT; | |
| continue; | |
| case AVERROR(EINPROGRESS): | |
| case AVERROR(EAGAIN): | |
| ret = ff_poll_interrupt(&p, 1, timeout, &h->interrupt_callback); | |
| if (ret < 0) | |
| return ret; | |
| optlen = sizeof(ret); | |
| if (getsockopt (fd, SOL_SOCKET, SO_ERROR, &ret, &optlen)) | |
| ret = AVUNERROR(ff_neterrno()); | |
| if (ret != 0) { | |
| char errbuf[100]; | |
| ret = AVERROR(ret); | |
| av_strerror(ret, errbuf, sizeof(errbuf)); | |
| if (will_try_next) | |
| av_log(h, AV_LOG_WARNING, | |
| "Connection to %s failed (%s), trying next address\n", | |
| h->filename, errbuf); | |
| else | |
| av_log(h, AV_LOG_ERROR, "Connection to %s failed: %s\n", | |
| h->filename, errbuf); | |
| } | |
| default: | |
| return ret; | |
| } | |
| } | |
| return ret; | |
| } | |
| static void interleave_addrinfo(struct addrinfo *base) | |
| { | |
| struct addrinfo **next = &base->ai_next; | |
| while (*next) { | |
| struct addrinfo *cur = *next; | |
| // Iterate forward until we find an entry of a different family. | |
| if (cur->ai_family == base->ai_family) { | |
| next = &cur->ai_next; | |
| continue; | |
| } | |
| if (cur == base->ai_next) { | |
| // If the first one following base is of a different family, just | |
| // move base forward one step and continue. | |
| base = cur; | |
| next = &base->ai_next; | |
| continue; | |
| } | |
| // Unchain cur from the rest of the list from its current spot. | |
| *next = cur->ai_next; | |
| // Hook in cur directly after base. | |
| cur->ai_next = base->ai_next; | |
| base->ai_next = cur; | |
| // Restart with a new base. We know that before moving the cur element, | |
| // everything between the previous base and cur had the same family, | |
| // different from cur->ai_family. Therefore, we can keep next pointing | |
| // where it was, and continue from there with base at the one after | |
| // cur. | |
| base = cur->ai_next; | |
| } | |
| } | |
| static void print_address_list(void *ctx, const struct addrinfo *addr, | |
| const char *title) | |
| { | |
| char hostbuf[100], portbuf[20]; | |
| av_log(ctx, AV_LOG_DEBUG, "%s:\n", title); | |
| while (addr) { | |
| getnameinfo(addr->ai_addr, addr->ai_addrlen, | |
| hostbuf, sizeof(hostbuf), portbuf, sizeof(portbuf), | |
| NI_NUMERICHOST | NI_NUMERICSERV); | |
| av_log(ctx, AV_LOG_DEBUG, "Address %s port %s\n", hostbuf, portbuf); | |
| addr = addr->ai_next; | |
| } | |
| } | |
| struct ConnectionAttempt { | |
| int fd; | |
| int64_t deadline_us; | |
| struct addrinfo *addr; | |
| }; | |
| // Returns < 0 on error, 0 on successfully started connection attempt, | |
| // > 0 for a connection that succeeded already. | |
| static int start_connect_attempt(struct ConnectionAttempt *attempt, | |
| struct addrinfo **ptr, int timeout_ms, | |
| URLContext *h, | |
| int (*customize_fd)(void *, int, int), void *customize_ctx) | |
| { | |
| struct addrinfo *ai = *ptr; | |
| int ret; | |
| *ptr = ai->ai_next; | |
| attempt->fd = ff_socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol, h); | |
| if (attempt->fd < 0) | |
| return ff_neterrno(); | |
| attempt->deadline_us = av_gettime_relative() + timeout_ms * 1000; | |
| attempt->addr = ai; | |
| ff_socket_nonblock(attempt->fd, 1); | |
| if (customize_fd) { | |
| ret = customize_fd(customize_ctx, attempt->fd, ai->ai_family); | |
| if (ret) { | |
| closesocket(attempt->fd); | |
| attempt->fd = -1; | |
| return ret; | |
| } | |
| } | |
| while ((ret = connect(attempt->fd, ai->ai_addr, ai->ai_addrlen))) { | |
| ret = ff_neterrno(); | |
| switch (ret) { | |
| case AVERROR(EINTR): | |
| if (ff_check_interrupt(&h->interrupt_callback)) { | |
| closesocket(attempt->fd); | |
| attempt->fd = -1; | |
| return AVERROR_EXIT; | |
| } | |
| continue; | |
| case AVERROR(EINPROGRESS): | |
| case AVERROR(EAGAIN): | |
| return 0; | |
| default: | |
| closesocket(attempt->fd); | |
| attempt->fd = -1; | |
| return ret; | |
| } | |
| } | |
| return 1; | |
| } | |
| // Try a new connection to another address after 200 ms, as suggested in | |
| // RFC 8305 (or sooner if an earlier attempt fails). | |
| #define NEXT_ATTEMPT_DELAY_MS 200 | |
| int ff_connect_parallel(struct addrinfo *addrs, int timeout_ms_per_address, | |
| int parallel, URLContext *h, int *fd, | |
| int (*customize_fd)(void *, int, int), void *customize_ctx) | |
| { | |
| struct ConnectionAttempt attempts[3]; | |
| struct pollfd pfd[3]; | |
| int nb_attempts = 0, i, j; | |
| int64_t next_attempt_us = av_gettime_relative(), next_deadline_us; | |
| int last_err = AVERROR(EIO); | |
| socklen_t optlen; | |
| char errbuf[100], hostbuf[100], portbuf[20]; | |
| if (parallel > FF_ARRAY_ELEMS(attempts)) | |
| parallel = FF_ARRAY_ELEMS(attempts); | |
| print_address_list(h, addrs, "Original list of addresses"); | |
| // This mutates the list, but the head of the list is still the same | |
| // element, so the caller, who owns the list, doesn't need to get | |
| // an updated pointer. | |
| interleave_addrinfo(addrs); | |
| print_address_list(h, addrs, "Interleaved list of addresses"); | |
| while (nb_attempts > 0 || addrs) { | |
| // Start a new connection attempt, if possible. | |
| if (nb_attempts < parallel && addrs) { | |
| getnameinfo(addrs->ai_addr, addrs->ai_addrlen, | |
| hostbuf, sizeof(hostbuf), portbuf, sizeof(portbuf), | |
| NI_NUMERICHOST | NI_NUMERICSERV); | |
| av_log(h, AV_LOG_VERBOSE, "Starting connection attempt to %s port %s\n", | |
| hostbuf, portbuf); | |
| last_err = start_connect_attempt(&attempts[nb_attempts], &addrs, | |
| timeout_ms_per_address, h, | |
| customize_fd, customize_ctx); | |
| if (last_err < 0) { | |
| av_strerror(last_err, errbuf, sizeof(errbuf)); | |
| av_log(h, AV_LOG_VERBOSE, "Connected attempt failed: %s\n", | |
| errbuf); | |
| continue; | |
| } | |
| if (last_err > 0) { | |
| for (i = 0; i < nb_attempts; i++) | |
| closesocket(attempts[i].fd); | |
| *fd = attempts[nb_attempts].fd; | |
| return 0; | |
| } | |
| pfd[nb_attempts].fd = attempts[nb_attempts].fd; | |
| pfd[nb_attempts].events = POLLOUT; | |
| next_attempt_us = av_gettime_relative() + NEXT_ATTEMPT_DELAY_MS * 1000; | |
| nb_attempts++; | |
| } | |
| av_assert0(nb_attempts > 0); | |
| // The connection attempts are sorted from oldest to newest, so the | |
| // first one will have the earliest deadline. | |
| next_deadline_us = attempts[0].deadline_us; | |
| // If we can start another attempt in parallel, wait until that time. | |
| if (nb_attempts < parallel && addrs) | |
| next_deadline_us = FFMIN(next_deadline_us, next_attempt_us); | |
| last_err = ff_poll_interrupt(pfd, nb_attempts, | |
| (next_deadline_us - av_gettime_relative())/1000, | |
| &h->interrupt_callback); | |
| if (last_err < 0 && last_err != AVERROR(ETIMEDOUT)) | |
| break; | |
| // Check the status from the poll output. | |
| for (i = 0; i < nb_attempts; i++) { | |
| last_err = 0; | |
| if (pfd[i].revents) { | |
| // Some sort of action for this socket, check its status (either | |
| // a successful connection or an error). | |
| optlen = sizeof(last_err); | |
| if (getsockopt(attempts[i].fd, SOL_SOCKET, SO_ERROR, &last_err, &optlen)) | |
| last_err = ff_neterrno(); | |
| else if (last_err != 0) | |
| last_err = AVERROR(last_err); | |
| if (last_err == 0) { | |
| // Everything is ok, we seem to have a successful | |
| // connection. Close other sockets and return this one. | |
| for (j = 0; j < nb_attempts; j++) | |
| if (j != i) | |
| closesocket(attempts[j].fd); | |
| *fd = attempts[i].fd; | |
| getnameinfo(attempts[i].addr->ai_addr, attempts[i].addr->ai_addrlen, | |
| hostbuf, sizeof(hostbuf), portbuf, sizeof(portbuf), | |
| NI_NUMERICHOST | NI_NUMERICSERV); | |
| av_log(h, AV_LOG_VERBOSE, "Successfully connected to %s port %s\n", | |
| hostbuf, portbuf); | |
| return 0; | |
| } | |
| } | |
| if (attempts[i].deadline_us < av_gettime_relative() && !last_err) | |
| last_err = AVERROR(ETIMEDOUT); | |
| if (!last_err) | |
| continue; | |
| // Error (or timeout) for this socket; close the socket and remove | |
| // it from the attempts/pfd arrays, to let a new attempt start | |
| // directly. | |
| getnameinfo(attempts[i].addr->ai_addr, attempts[i].addr->ai_addrlen, | |
| hostbuf, sizeof(hostbuf), portbuf, sizeof(portbuf), | |
| NI_NUMERICHOST | NI_NUMERICSERV); | |
| av_strerror(last_err, errbuf, sizeof(errbuf)); | |
| av_log(h, AV_LOG_VERBOSE, "Connection attempt to %s port %s " | |
| "failed: %s\n", hostbuf, portbuf, errbuf); | |
| closesocket(attempts[i].fd); | |
| memmove(&attempts[i], &attempts[i + 1], | |
| (nb_attempts - i - 1) * sizeof(*attempts)); | |
| memmove(&pfd[i], &pfd[i + 1], | |
| (nb_attempts - i - 1) * sizeof(*pfd)); | |
| i--; | |
| nb_attempts--; | |
| } | |
| } | |
| for (i = 0; i < nb_attempts; i++) | |
| closesocket(attempts[i].fd); | |
| if (last_err >= 0) | |
| last_err = AVERROR(ECONNREFUSED); | |
| if (last_err != AVERROR_EXIT) { | |
| av_strerror(last_err, errbuf, sizeof(errbuf)); | |
| av_log(h, AV_LOG_ERROR, "Connection to %s failed: %s\n", | |
| h->filename, errbuf); | |
| } | |
| return last_err; | |
| } | |
| static int match_host_pattern(const char *pattern, const char *hostname) | |
| { | |
| int len_p, len_h; | |
| if (!strcmp(pattern, "*")) | |
| return 1; | |
| // Skip a possible *. at the start of the pattern | |
| if (pattern[0] == '*') | |
| pattern++; | |
| if (pattern[0] == '.') | |
| pattern++; | |
| len_p = strlen(pattern); | |
| len_h = strlen(hostname); | |
| if (len_p > len_h) | |
| return 0; | |
| // Simply check if the end of hostname is equal to 'pattern' | |
| if (!strcmp(pattern, &hostname[len_h - len_p])) { | |
| if (len_h == len_p) | |
| return 1; // Exact match | |
| if (hostname[len_h - len_p - 1] == '.') | |
| return 1; // The matched substring is a domain and not just a substring of a domain | |
| } | |
| return 0; | |
| } | |
| int ff_http_match_no_proxy(const char *no_proxy, const char *hostname) | |
| { | |
| char *buf, *start; | |
| int ret = 0; | |
| if (!no_proxy) | |
| return 0; | |
| if (!hostname) | |
| return 0; | |
| buf = av_strdup(no_proxy); | |
| if (!buf) | |
| return 0; | |
| start = buf; | |
| while (start) { | |
| char *sep, *next = NULL; | |
| start += strspn(start, " ,"); | |
| sep = start + strcspn(start, " ,"); | |
| if (*sep) { | |
| next = sep + 1; | |
| *sep = '\0'; | |
| } | |
| if (match_host_pattern(start, hostname)) { | |
| ret = 1; | |
| break; | |
| } | |
| start = next; | |
| } | |
| av_free(buf); | |
| return ret; | |
| } | |
| void ff_log_net_error(void *ctx, int level, const char* prefix) | |
| { | |
| char errbuf[100]; | |
| av_strerror(ff_neterrno(), errbuf, sizeof(errbuf)); | |
| av_log(ctx, level, "%s: %s\n", prefix, errbuf); | |
| } |