| #include "private-libwebsockets.h" |
| |
| /* |
| * included from libwebsockets.c for unix builds |
| */ |
| |
| unsigned long long time_in_microseconds(void) |
| { |
| struct timeval tv; |
| gettimeofday(&tv, NULL); |
| return (tv.tv_sec * 1000000) + tv.tv_usec; |
| } |
| |
| LWS_VISIBLE int libwebsockets_get_random(struct libwebsocket_context *context, |
| void *buf, int len) |
| { |
| return read(context->fd_random, (char *)buf, len); |
| } |
| |
| LWS_VISIBLE int lws_send_pipe_choked(struct libwebsocket *wsi) |
| { |
| struct libwebsocket_pollfd fds; |
| |
| /* treat the fact we got a truncated send pending as if we're choked */ |
| if (wsi->truncated_send_len) |
| return 1; |
| |
| fds.fd = wsi->sock; |
| fds.events = POLLOUT; |
| fds.revents = 0; |
| |
| if (poll(&fds, 1, 0) != 1) |
| return 1; |
| |
| if ((fds.revents & POLLOUT) == 0) |
| return 1; |
| |
| /* okay to send another packet without blocking */ |
| |
| return 0; |
| } |
| |
| LWS_VISIBLE int |
| lws_poll_listen_fd(struct libwebsocket_pollfd *fd) |
| { |
| return poll(fd, 1, 0); |
| } |
| |
| /* |
| * This is just used to interrupt poll waiting |
| * we don't have to do anything with it. |
| */ |
| #ifdef LWS_OPENSSL_SUPPORT |
| static void lws_sigusr2(int sig) |
| { |
| } |
| #endif |
| |
| #ifdef LWS_USE_LIBEV |
| LWS_VISIBLE void |
| libwebsocket_accept_cb(struct ev_loop *loop, struct ev_io *watcher, int revents) |
| { |
| struct libwebsocket_pollfd eventfd; |
| struct lws_io_watcher *lws_io = (struct lws_io_watcher*)watcher; |
| struct libwebsocket_context *context = lws_io->context; |
| |
| if (revents & EV_ERROR) |
| return; |
| |
| eventfd.fd = watcher->fd; |
| eventfd.revents = EV_NONE; |
| if (revents & EV_READ) |
| eventfd.revents |= LWS_POLLIN; |
| |
| if (revents & EV_WRITE) |
| eventfd.revents |= LWS_POLLOUT; |
| |
| libwebsocket_service_fd(context,&eventfd); |
| } |
| |
| LWS_VISIBLE void |
| libwebsocket_sigint_cb( |
| struct ev_loop *loop, struct ev_signal* watcher, int revents) |
| { |
| ev_break(loop, EVBREAK_ALL); |
| } |
| |
| LWS_VISIBLE int |
| libwebsocket_initloop( |
| struct libwebsocket_context *context, |
| struct ev_loop *loop) |
| { |
| int status = 0; |
| int backend; |
| const char * backend_name; |
| struct ev_io *w_accept = (ev_io *)&context->w_accept; |
| struct ev_signal *w_sigint = (ev_signal *)&context->w_sigint; |
| |
| if (!loop) |
| loop = ev_default_loop(0); |
| |
| context->io_loop = loop; |
| |
| /* |
| * Initialize the accept w_accept with the listening socket |
| * and register a callback for read operations: |
| */ |
| ev_io_init(w_accept, libwebsocket_accept_cb, |
| context->listen_service_fd, EV_READ); |
| ev_io_start(context->io_loop,w_accept); |
| ev_signal_init(w_sigint, libwebsocket_sigint_cb, SIGINT); |
| ev_signal_start(context->io_loop,w_sigint); |
| backend = ev_backend(loop); |
| |
| switch (backend) { |
| case EVBACKEND_SELECT: |
| backend_name = "select"; |
| break; |
| case EVBACKEND_POLL: |
| backend_name = "poll"; |
| break; |
| case EVBACKEND_EPOLL: |
| backend_name = "epoll"; |
| break; |
| case EVBACKEND_KQUEUE: |
| backend_name = "kqueue"; |
| break; |
| case EVBACKEND_DEVPOLL: |
| backend_name = "/dev/poll"; |
| break; |
| case EVBACKEND_PORT: |
| backend_name = "Solaris 10 \"port\""; |
| break; |
| default: |
| backend_name = "Unknown libev backend"; |
| break; |
| }; |
| |
| lwsl_notice(" libev backend: %s\n", backend_name); |
| |
| return status; |
| } |
| |
| #endif /* LWS_USE_LIBEV */ |
| |
| /** |
| * libwebsocket_cancel_service() - Cancel servicing of pending websocket activity |
| * @context: Websocket context |
| * |
| * This function let a call to libwebsocket_service() waiting for a timeout |
| * immediately return. |
| */ |
| LWS_VISIBLE void |
| libwebsocket_cancel_service(struct libwebsocket_context *context) |
| { |
| char buf = 0; |
| |
| if (write(context->dummy_pipe_fds[1], &buf, sizeof(buf)) != 1) |
| lwsl_err("Cannot write to dummy pipe"); |
| } |
| |
| LWS_VISIBLE void lwsl_emit_syslog(int level, const char *line) |
| { |
| int syslog_level = LOG_DEBUG; |
| |
| switch (level) { |
| case LLL_ERR: |
| syslog_level = LOG_ERR; |
| break; |
| case LLL_WARN: |
| syslog_level = LOG_WARNING; |
| break; |
| case LLL_NOTICE: |
| syslog_level = LOG_NOTICE; |
| break; |
| case LLL_INFO: |
| syslog_level = LOG_INFO; |
| break; |
| } |
| syslog(syslog_level, "%s", line); |
| } |
| |
| LWS_VISIBLE int |
| lws_plat_service(struct libwebsocket_context *context, int timeout_ms) |
| { |
| int n; |
| int m; |
| char buf; |
| |
| /* stay dead once we are dead */ |
| |
| if (context == NULL) |
| return 1; |
| |
| #ifdef LWS_USE_LIBEV |
| if (context->io_loop && LWS_LIBEV_ENABLED(context)) |
| ev_run(context->io_loop, 0); |
| #endif /* LWS_USE_LIBEV */ |
| context->service_tid = context->protocols[0].callback(context, NULL, |
| LWS_CALLBACK_GET_THREAD_ID, NULL, NULL, 0); |
| |
| n = poll(context->fds, context->fds_count, timeout_ms); |
| context->service_tid = 0; |
| |
| if (n == 0) /* poll timeout */ { |
| libwebsocket_service_fd(context, NULL); |
| return 0; |
| } |
| |
| if (n < 0) { |
| if (LWS_ERRNO != LWS_EINTR) |
| return -1; |
| return 0; |
| } |
| |
| /* any socket with events to service? */ |
| |
| for (n = 0; n < context->fds_count; n++) { |
| if (!context->fds[n].revents) |
| continue; |
| |
| if (context->fds[n].fd == context->dummy_pipe_fds[0]) { |
| if (read(context->fds[n].fd, &buf, 1) != 1) |
| lwsl_err("Cannot read from dummy pipe."); |
| continue; |
| } |
| |
| m = libwebsocket_service_fd(context, &context->fds[n]); |
| if (m < 0) |
| return -1; |
| /* if something closed, retry this slot */ |
| if (m) |
| n--; |
| } |
| |
| return 0; |
| } |
| |
| LWS_VISIBLE int |
| lws_plat_set_socket_options(struct libwebsocket_context *context, int fd) |
| { |
| int optval = 1; |
| socklen_t optlen = sizeof(optval); |
| |
| #if defined(__APPLE__) || defined(__FreeBSD__) || defined(__NetBSD__) |
| struct protoent *tcp_proto; |
| #endif |
| |
| if (context->ka_time) { |
| /* enable keepalive on this socket */ |
| optval = 1; |
| if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, |
| (const void *)&optval, optlen) < 0) |
| return 1; |
| |
| #if defined(__APPLE__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__CYGWIN__) |
| |
| /* |
| * didn't find a way to set these per-socket, need to |
| * tune kernel systemwide values |
| */ |
| #else |
| /* set the keepalive conditions we want on it too */ |
| optval = context->ka_time; |
| if (setsockopt(fd, IPPROTO_IP, TCP_KEEPIDLE, |
| (const void *)&optval, optlen) < 0) |
| return 1; |
| |
| optval = context->ka_interval; |
| if (setsockopt(fd, IPPROTO_IP, TCP_KEEPINTVL, |
| (const void *)&optval, optlen) < 0) |
| return 1; |
| |
| optval = context->ka_probes; |
| if (setsockopt(fd, IPPROTO_IP, TCP_KEEPCNT, |
| (const void *)&optval, optlen) < 0) |
| return 1; |
| #endif |
| } |
| |
| /* Disable Nagle */ |
| optval = 1; |
| #if !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__NetBSD__) |
| setsockopt(fd, SOL_TCP, TCP_NODELAY, (const void *)&optval, optlen); |
| #else |
| tcp_proto = getprotobyname("TCP"); |
| setsockopt(fd, tcp_proto->p_proto, TCP_NODELAY, &optval, optlen); |
| #endif |
| |
| /* We are nonblocking... */ |
| fcntl(fd, F_SETFL, O_NONBLOCK); |
| |
| return 0; |
| } |
| |
| LWS_VISIBLE void |
| lws_plat_drop_app_privileges(struct lws_context_creation_info *info) |
| { |
| if (info->gid != -1) |
| if (setgid(info->gid)) |
| lwsl_warn("setgid: %s\n", strerror(LWS_ERRNO)); |
| if (info->uid != -1) |
| if (setuid(info->uid)) |
| lwsl_warn("setuid: %s\n", strerror(LWS_ERRNO)); |
| } |
| |
| LWS_VISIBLE int |
| lws_plat_init_fd_tables(struct libwebsocket_context *context) |
| { |
| #ifdef LWS_USE_LIBEV |
| if (LWS_LIBEV_ENABLED(context)) { |
| context->w_accept.context = context; |
| context->w_sigint.context = context; |
| return 0; |
| } |
| #endif |
| if (pipe(context->dummy_pipe_fds)) { |
| lwsl_err("Unable to create pipe\n"); |
| return 1; |
| } |
| |
| /* use the read end of pipe as first item */ |
| context->fds[0].fd = context->dummy_pipe_fds[0]; |
| context->fds[0].events = LWS_POLLIN; |
| context->fds[0].revents = 0; |
| context->fds_count = 1; |
| |
| context->fd_random = open(SYSTEM_RANDOM_FILEPATH, O_RDONLY); |
| if (context->fd_random < 0) { |
| lwsl_err("Unable to open random device %s %d\n", |
| SYSTEM_RANDOM_FILEPATH, context->fd_random); |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| static void sigpipe_handler(int x) |
| { |
| } |
| |
| |
| LWS_VISIBLE int |
| lws_plat_context_early_init(void) |
| { |
| sigset_t mask; |
| |
| signal(SIGUSR2, lws_sigusr2); |
| sigemptyset(&mask); |
| sigaddset(&mask, SIGUSR2); |
| |
| sigprocmask(SIG_BLOCK, &mask, NULL); |
| |
| signal(SIGPIPE, sigpipe_handler); |
| |
| return 0; |
| } |
| |
| LWS_VISIBLE void |
| lws_plat_context_early_destroy(struct libwebsocket_context *context) |
| { |
| } |
| |
| LWS_VISIBLE void |
| lws_plat_context_late_destroy(struct libwebsocket_context *context) |
| { |
| close(context->dummy_pipe_fds[0]); |
| close(context->dummy_pipe_fds[1]); |
| close(context->fd_random); |
| } |
| |
| /* cast a struct sockaddr_in6 * into addr for ipv6 */ |
| |
| LWS_VISIBLE int |
| interface_to_sa(struct libwebsocket_context *context, |
| const char *ifname, struct sockaddr_in *addr, size_t addrlen) |
| { |
| int rc = -1; |
| |
| struct ifaddrs *ifr; |
| struct ifaddrs *ifc; |
| #ifdef LWS_USE_IPV6 |
| struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr; |
| #endif |
| |
| getifaddrs(&ifr); |
| for (ifc = ifr; ifc != NULL && rc; ifc = ifc->ifa_next) { |
| if (!ifc->ifa_addr) |
| continue; |
| |
| lwsl_info(" interface %s vs %s\n", ifc->ifa_name, ifname); |
| |
| if (strcmp(ifc->ifa_name, ifname)) |
| continue; |
| |
| switch (ifc->ifa_addr->sa_family) { |
| case AF_INET: |
| #ifdef LWS_USE_IPV6 |
| if (LWS_IPV6_ENABLED(context)) { |
| /* map IPv4 to IPv6 */ |
| bzero((char *)&addr6->sin6_addr, |
| sizeof(struct in6_addr)); |
| addr6->sin6_addr.s6_addr[10] = 0xff; |
| addr6->sin6_addr.s6_addr[11] = 0xff; |
| memcpy(&addr6->sin6_addr.s6_addr[12], |
| &((struct sockaddr_in *)ifc->ifa_addr)->sin_addr, |
| sizeof(struct in_addr)); |
| } else |
| #endif |
| memcpy(addr, |
| (struct sockaddr_in *)ifc->ifa_addr, |
| sizeof(struct sockaddr_in)); |
| break; |
| #ifdef LWS_USE_IPV6 |
| case AF_INET6: |
| if (rc >= 0) |
| break; |
| memcpy(&addr6->sin6_addr, |
| &((struct sockaddr_in6 *)ifc->ifa_addr)->sin6_addr, |
| sizeof(struct in6_addr)); |
| break; |
| #endif |
| default: |
| continue; |
| } |
| rc = 0; |
| } |
| |
| freeifaddrs(ifr); |
| |
| return rc; |
| } |
| |
| LWS_VISIBLE void |
| lws_plat_insert_socket_into_fds(struct libwebsocket_context *context, |
| struct libwebsocket *wsi) |
| { |
| #ifdef LWS_USE_LIBEV |
| if (context && context->io_loop && LWS_LIBEV_ENABLED(context)) |
| ev_io_start(context->io_loop, (struct ev_io *)&wsi->w_read); |
| #endif /* LWS_USE_LIBEV */ |
| context->fds[context->fds_count++].revents = 0; |
| } |
| |
| LWS_VISIBLE void |
| lws_plat_delete_socket_from_fds(struct libwebsocket_context *context, |
| struct libwebsocket *wsi, int m) |
| { |
| } |
| |
| LWS_VISIBLE void |
| lws_plat_service_periodic(struct libwebsocket_context *context) |
| { |
| /* if our parent went down, don't linger around */ |
| if (context->started_with_parent && |
| kill(context->started_with_parent, 0) < 0) |
| kill(getpid(), SIGTERM); |
| } |
| |
| LWS_VISIBLE int |
| lws_plat_change_pollfd(struct libwebsocket_context *context, |
| struct libwebsocket *wsi, struct libwebsocket_pollfd *pfd) |
| { |
| return 0; |
| } |
| |
| LWS_VISIBLE int |
| lws_plat_open_file(const char* filename, unsigned long* filelen) |
| { |
| struct stat stat_buf; |
| int ret = open(filename, O_RDONLY); |
| |
| if (ret < 0) |
| return LWS_INVALID_FILE; |
| |
| fstat(ret, &stat_buf); |
| *filelen = stat_buf.st_size; |
| return ret; |
| } |