#include "private-libwebsockets.h" #include #include /* * included from libwebsockets.c for unix builds */ unsigned long long time_in_microseconds(void) { struct timeval tv; gettimeofday(&tv, NULL); return ((unsigned long long)tv.tv_sec * 1000000LL) + tv.tv_usec; } LWS_VISIBLE int lws_get_random(struct lws_context *context, void *buf, int len) { return read(context->fd_random, (char *)buf, len); } LWS_VISIBLE int lws_send_pipe_choked(struct lws *wsi) { struct lws_pollfd fds; /* treat the fact we got a truncated send pending as if we're choked */ if (wsi->trunc_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 lws_pollfd *fd) { return poll(fd, 1, 0); } /** * lws_cancel_service_pt() - Cancel servicing of pending socket activity * on one thread * @wsi: Cancel service on the thread this wsi is serviced by * * This function let a call to lws_service() waiting for a timeout * immediately return. */ LWS_VISIBLE void lws_cancel_service_pt(struct lws *wsi) { struct lws_context_per_thread *pt = &wsi->context->pt[(int)wsi->tsi]; char buf = 0; if (write(pt->dummy_pipe_fds[1], &buf, sizeof(buf)) != 1) lwsl_err("Cannot write to dummy pipe"); } /** * lws_cancel_service() - Cancel ALL servicing of pending socket activity * @context: Websocket context * * This function let a call to lws_service() waiting for a timeout * immediately return. */ LWS_VISIBLE void lws_cancel_service(struct lws_context *context) { struct lws_context_per_thread *pt = &context->pt[0]; char buf = 0, m = context->count_threads; while (m--) { if (write(pt->dummy_pipe_fds[1], &buf, sizeof(buf)) != 1) lwsl_err("Cannot write to dummy pipe"); pt++; } } 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_tsi(struct lws_context *context, int timeout_ms, int tsi) { struct lws_context_per_thread *pt = &context->pt[tsi]; int n = -1, m, c; char buf; /* stay dead once we are dead */ if (!context) return 1; if (timeout_ms < 0) goto faked_service; lws_libev_run(context, tsi); lws_libuv_run(context, tsi); if (!context->service_tid_detected) { struct lws _lws; memset(&_lws, 0, sizeof(_lws)); _lws.context = context; context->service_tid_detected = context->protocols[0].callback( &_lws, LWS_CALLBACK_GET_THREAD_ID, NULL, NULL, 0); } context->service_tid = context->service_tid_detected; timeout_ms = lws_service_adjust_timeout(context, timeout_ms, tsi); n = poll(pt->fds, pt->fds_count, timeout_ms); #ifdef LWS_OPENSSL_SUPPORT if (!pt->rx_draining_ext_list && !lws_ssl_anybody_has_buffered_read_tsi(context, tsi) && !n) { #else if (!pt->rx_draining_ext_list && !n) /* poll timeout */ { #endif lws_service_fd_tsi(context, NULL, tsi); return 0; } faked_service: m = lws_service_flag_pending(context, tsi); if (m) c = -1; /* unknown limit */ else if (n < 0) { if (LWS_ERRNO != LWS_EINTR) return -1; return 0; } else c = n; /* any socket with events to service? */ for (n = 0; n < pt->fds_count && c; n++) { if (!pt->fds[n].revents) continue; c--; if (pt->fds[n].fd == pt->dummy_pipe_fds[0]) { if (read(pt->fds[n].fd, &buf, 1) != 1) lwsl_err("Cannot read from dummy pipe."); continue; } m = lws_service_fd_tsi(context, &pt->fds[n], tsi); if (m < 0) return -1; /* if something closed, retry this slot */ if (m) n--; } return 0; } LWS_VISIBLE int lws_plat_service(struct lws_context *context, int timeout_ms) { return lws_plat_service_tsi(context, timeout_ms, 0); } LWS_VISIBLE int lws_plat_set_socket_options(struct lws_context *context, int fd) { int optval = 1; socklen_t optlen = sizeof(optval); #if defined(__APPLE__) || \ defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || \ defined(__NetBSD__) || \ defined(__OpenBSD__) 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(__FreeBSD_kernel__) || \ defined(__NetBSD__) || \ defined(__CYGWIN__) || defined(__OpenBSD__) /* * 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_TCP, TCP_KEEPIDLE, (const void *)&optval, optlen) < 0) return 1; optval = context->ka_interval; if (setsockopt(fd, IPPROTO_TCP, TCP_KEEPINTVL, (const void *)&optval, optlen) < 0) return 1; optval = context->ka_probes; if (setsockopt(fd, IPPROTO_TCP, TCP_KEEPCNT, (const void *)&optval, optlen) < 0) return 1; #endif } /* Disable Nagle */ optval = 1; #if !defined(__APPLE__) && \ !defined(__FreeBSD__) && !defined(__FreeBSD_kernel__) && \ !defined(__NetBSD__) && \ !defined(__OpenBSD__) if (setsockopt(fd, SOL_TCP, TCP_NODELAY, (const void *)&optval, optlen) < 0) return 1; #else tcp_proto = getprotobyname("TCP"); if (setsockopt(fd, tcp_proto->p_proto, TCP_NODELAY, &optval, optlen) < 0) return 1; #endif /* We are nonblocking... */ if (fcntl(fd, F_SETFL, O_NONBLOCK) < 0) return 1; 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) { struct passwd *p = getpwuid(info->uid); if (p) { initgroups(p->pw_name, info->gid); if (setuid(info->uid)) lwsl_warn("setuid: %s\n", strerror(LWS_ERRNO)); else lwsl_notice(" Set privs to user '%s'\n", p->pw_name); } else lwsl_warn("getpwuid: unable to find uid %d", info->uid); } } static void sigpipe_handler(int x) { } LWS_VISIBLE int lws_plat_context_early_init(void) { signal(SIGPIPE, sigpipe_handler); return 0; } LWS_VISIBLE void lws_plat_context_early_destroy(struct lws_context *context) { } LWS_VISIBLE void lws_plat_context_late_destroy(struct lws_context *context) { struct lws_context_per_thread *pt = &context->pt[0]; int m = context->count_threads; if (context->lws_lookup) lws_free(context->lws_lookup); while (m--) { close(pt->dummy_pipe_fds[0]); close(pt->dummy_pipe_fds[1]); pt++; } close(context->fd_random); } /* cast a struct sockaddr_in6 * into addr for ipv6 */ LWS_VISIBLE int lws_interface_to_sa(int ipv6, 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 (ipv6) { /* 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: memcpy(&addr6->sin6_addr, &((struct sockaddr_in6 *)ifc->ifa_addr)->sin6_addr, sizeof(struct in6_addr)); break; #endif default: continue; } rc = 0; } freeifaddrs(ifr); if (rc == -1) { /* check if bind to IP adddress */ #ifdef LWS_USE_IPV6 if (inet_pton(AF_INET6, ifname, &addr6->sin6_addr) == 1) rc = 0; else #endif if (inet_pton(AF_INET, ifname, &addr->sin_addr) == 1) rc = 0; } return rc; } LWS_VISIBLE void lws_plat_insert_socket_into_fds(struct lws_context *context, struct lws *wsi) { struct lws_context_per_thread *pt = &context->pt[(int)wsi->tsi]; lws_libev_io(wsi, LWS_EV_START | LWS_EV_READ); lws_libuv_io(wsi, LWS_EV_START | LWS_EV_READ); pt->fds[pt->fds_count++].revents = 0; } LWS_VISIBLE void lws_plat_delete_socket_from_fds(struct lws_context *context, struct lws *wsi, int m) { struct lws_context_per_thread *pt = &context->pt[(int)wsi->tsi]; pt->fds_count--; } LWS_VISIBLE void lws_plat_service_periodic(struct lws_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 lws_context *context, struct lws *wsi, struct lws_pollfd *pfd) { return 0; } LWS_VISIBLE const char * lws_plat_inet_ntop(int af, const void *src, char *dst, int cnt) { return inet_ntop(af, src, dst, cnt); } static lws_filefd_type _lws_plat_file_open(struct lws *wsi, const char *filename, unsigned long *filelen, int flags) { struct stat stat_buf; int ret = open(filename, flags, 0664); if (ret < 0) return LWS_INVALID_FILE; if (fstat(ret, &stat_buf) < 0) { close(ret); return LWS_INVALID_FILE; } *filelen = stat_buf.st_size; return ret; } static int _lws_plat_file_close(struct lws *wsi, lws_filefd_type fd) { return close(fd); } unsigned long _lws_plat_file_seek_cur(struct lws *wsi, lws_filefd_type fd, long offset) { return lseek(fd, offset, SEEK_CUR); } static int _lws_plat_file_read(struct lws *wsi, lws_filefd_type fd, unsigned long *amount, unsigned char *buf, unsigned long len) { long n; n = read((int)fd, buf, len); if (n == -1) { *amount = 0; return -1; } *amount = n; return 0; } static int _lws_plat_file_write(struct lws *wsi, lws_filefd_type fd, unsigned long *amount, unsigned char *buf, unsigned long len) { long n; n = write((int)fd, buf, len); if (n == -1) { *amount = 0; return -1; } *amount = n; return 0; } LWS_VISIBLE int lws_plat_init(struct lws_context *context, struct lws_context_creation_info *info) { struct lws_context_per_thread *pt = &context->pt[0]; int n = context->count_threads, fd; /* master context has the global fd lookup array */ context->lws_lookup = lws_zalloc(sizeof(struct lws *) * context->max_fds); if (context->lws_lookup == NULL) { lwsl_err("OOM on lws_lookup array for %d connections\n", context->max_fds); return 1; } lwsl_notice(" mem: platform fd map: %5u bytes\n", sizeof(struct lws *) * context->max_fds); fd = open(SYSTEM_RANDOM_FILEPATH, O_RDONLY); context->fd_random = fd; if (context->fd_random < 0) { lwsl_err("Unable to open random device %s %d\n", SYSTEM_RANDOM_FILEPATH, context->fd_random); return 1; } if (!lws_libev_init_fd_table(context) && !lws_libuv_init_fd_table(context)) { /* otherwise libev handled it instead */ while (n--) { if (pipe(pt->dummy_pipe_fds)) { lwsl_err("Unable to create pipe\n"); return 1; } /* use the read end of pipe as first item */ pt->fds[0].fd = pt->dummy_pipe_fds[0]; pt->fds[0].events = LWS_POLLIN; pt->fds[0].revents = 0; pt->fds_count = 1; pt++; } } context->fops.open = _lws_plat_file_open; context->fops.close = _lws_plat_file_close; context->fops.seek_cur = _lws_plat_file_seek_cur; context->fops.read = _lws_plat_file_read; context->fops.write = _lws_plat_file_write; return 0; }