1 #include "private-libwebsockets.h"
4 * included from libwebsockets.c for unix builds
7 unsigned long long time_in_microseconds(void)
10 gettimeofday(&tv, NULL);
11 return (tv.tv_sec * 1000000) + tv.tv_usec;
14 LWS_VISIBLE int libwebsockets_get_random(struct libwebsocket_context *context,
17 return read(context->fd_random, (char *)buf, len);
20 LWS_VISIBLE int lws_send_pipe_choked(struct libwebsocket *wsi)
22 struct libwebsocket_pollfd fds;
24 /* treat the fact we got a truncated send pending as if we're choked */
25 if (wsi->truncated_send_len)
32 if (poll(&fds, 1, 0) != 1)
35 if ((fds.revents & POLLOUT) == 0)
38 /* okay to send another packet without blocking */
44 lws_poll_listen_fd(struct libwebsocket_pollfd *fd)
46 return poll(fd, 1, 0);
50 * This is just used to interrupt poll waiting
51 * we don't have to do anything with it.
53 static void lws_sigusr2(int sig)
58 * libwebsocket_cancel_service() - Cancel servicing of pending websocket activity
59 * @context: Websocket context
61 * This function let a call to libwebsocket_service() waiting for a timeout
65 libwebsocket_cancel_service(struct libwebsocket_context *context)
69 if (write(context->dummy_pipe_fds[1], &buf, sizeof(buf)) != 1)
70 lwsl_err("Cannot write to dummy pipe");
73 LWS_VISIBLE void lwsl_emit_syslog(int level, const char *line)
75 int syslog_level = LOG_DEBUG;
79 syslog_level = LOG_ERR;
82 syslog_level = LOG_WARNING;
85 syslog_level = LOG_NOTICE;
88 syslog_level = LOG_INFO;
91 syslog(syslog_level, "%s", line);
95 lws_plat_service(struct libwebsocket_context *context, int timeout_ms)
101 /* stay dead once we are dead */
106 lws_libev_run(context);
108 context->service_tid = context->protocols[0].callback(context, NULL,
109 LWS_CALLBACK_GET_THREAD_ID, NULL, NULL, 0);
111 n = poll(context->fds, context->fds_count, timeout_ms);
112 context->service_tid = 0;
114 if (n == 0) /* poll timeout */ {
115 libwebsocket_service_fd(context, NULL);
120 if (LWS_ERRNO != LWS_EINTR)
125 /* any socket with events to service? */
127 for (n = 0; n < context->fds_count; n++) {
128 if (!context->fds[n].revents)
131 if (context->fds[n].fd == context->dummy_pipe_fds[0]) {
132 if (read(context->fds[n].fd, &buf, 1) != 1)
133 lwsl_err("Cannot read from dummy pipe.");
137 m = libwebsocket_service_fd(context, &context->fds[n]);
140 /* if something closed, retry this slot */
149 lws_plat_set_socket_options(struct libwebsocket_context *context, int fd)
152 socklen_t optlen = sizeof(optval);
154 #if defined(__APPLE__) || defined(__FreeBSD__) || defined(__NetBSD__)
155 struct protoent *tcp_proto;
158 if (context->ka_time) {
159 /* enable keepalive on this socket */
161 if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE,
162 (const void *)&optval, optlen) < 0)
165 #if defined(__APPLE__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__CYGWIN__)
168 * didn't find a way to set these per-socket, need to
169 * tune kernel systemwide values
172 /* set the keepalive conditions we want on it too */
173 optval = context->ka_time;
174 if (setsockopt(fd, IPPROTO_IP, TCP_KEEPIDLE,
175 (const void *)&optval, optlen) < 0)
178 optval = context->ka_interval;
179 if (setsockopt(fd, IPPROTO_IP, TCP_KEEPINTVL,
180 (const void *)&optval, optlen) < 0)
183 optval = context->ka_probes;
184 if (setsockopt(fd, IPPROTO_IP, TCP_KEEPCNT,
185 (const void *)&optval, optlen) < 0)
192 #if !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__NetBSD__)
193 setsockopt(fd, SOL_TCP, TCP_NODELAY, (const void *)&optval, optlen);
195 tcp_proto = getprotobyname("TCP");
196 setsockopt(fd, tcp_proto->p_proto, TCP_NODELAY, &optval, optlen);
199 /* We are nonblocking... */
200 fcntl(fd, F_SETFL, O_NONBLOCK);
206 lws_plat_drop_app_privileges(struct lws_context_creation_info *info)
209 if (setgid(info->gid))
210 lwsl_warn("setgid: %s\n", strerror(LWS_ERRNO));
212 if (setuid(info->uid))
213 lwsl_warn("setuid: %s\n", strerror(LWS_ERRNO));
217 lws_plat_init_fd_tables(struct libwebsocket_context *context)
219 if (lws_libev_init_fd_table(context))
220 /* libev handled it instead */
223 if (pipe(context->dummy_pipe_fds)) {
224 lwsl_err("Unable to create pipe\n");
228 /* use the read end of pipe as first item */
229 context->fds[0].fd = context->dummy_pipe_fds[0];
230 context->fds[0].events = LWS_POLLIN;
231 context->fds[0].revents = 0;
232 context->fds_count = 1;
234 context->fd_random = open(SYSTEM_RANDOM_FILEPATH, O_RDONLY);
235 if (context->fd_random < 0) {
236 lwsl_err("Unable to open random device %s %d\n",
237 SYSTEM_RANDOM_FILEPATH, context->fd_random);
244 static void sigpipe_handler(int x)
250 lws_plat_context_early_init(void)
254 signal(SIGUSR2, lws_sigusr2);
256 sigaddset(&mask, SIGUSR2);
258 sigprocmask(SIG_BLOCK, &mask, NULL);
260 signal(SIGPIPE, sigpipe_handler);
266 lws_plat_context_early_destroy(struct libwebsocket_context *context)
271 lws_plat_context_late_destroy(struct libwebsocket_context *context)
273 close(context->dummy_pipe_fds[0]);
274 close(context->dummy_pipe_fds[1]);
275 close(context->fd_random);
278 /* cast a struct sockaddr_in6 * into addr for ipv6 */
281 interface_to_sa(struct libwebsocket_context *context,
282 const char *ifname, struct sockaddr_in *addr, size_t addrlen)
289 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr;
293 for (ifc = ifr; ifc != NULL && rc; ifc = ifc->ifa_next) {
297 lwsl_info(" interface %s vs %s\n", ifc->ifa_name, ifname);
299 if (strcmp(ifc->ifa_name, ifname))
302 switch (ifc->ifa_addr->sa_family) {
305 if (LWS_IPV6_ENABLED(context)) {
306 /* map IPv4 to IPv6 */
307 bzero((char *)&addr6->sin6_addr,
308 sizeof(struct in6_addr));
309 addr6->sin6_addr.s6_addr[10] = 0xff;
310 addr6->sin6_addr.s6_addr[11] = 0xff;
311 memcpy(&addr6->sin6_addr.s6_addr[12],
312 &((struct sockaddr_in *)ifc->ifa_addr)->sin_addr,
313 sizeof(struct in_addr));
317 (struct sockaddr_in *)ifc->ifa_addr,
318 sizeof(struct sockaddr_in));
324 memcpy(&addr6->sin6_addr,
325 &((struct sockaddr_in6 *)ifc->ifa_addr)->sin6_addr,
326 sizeof(struct in6_addr));
341 lws_plat_insert_socket_into_fds(struct libwebsocket_context *context,
342 struct libwebsocket *wsi)
344 lws_libev_io(context, wsi, LWS_EV_START | LWS_EV_READ);
345 context->fds[context->fds_count++].revents = 0;
349 lws_plat_delete_socket_from_fds(struct libwebsocket_context *context,
350 struct libwebsocket *wsi, int m)
355 lws_plat_service_periodic(struct libwebsocket_context *context)
357 /* if our parent went down, don't linger around */
358 if (context->started_with_parent &&
359 kill(context->started_with_parent, 0) < 0)
360 kill(getpid(), SIGTERM);
364 lws_plat_change_pollfd(struct libwebsocket_context *context,
365 struct libwebsocket *wsi, struct libwebsocket_pollfd *pfd)
371 lws_plat_open_file(const char* filename, unsigned long* filelen)
373 struct stat stat_buf;
374 int ret = open(filename, O_RDONLY);
377 return LWS_INVALID_FILE;
379 fstat(ret, &stat_buf);
380 *filelen = stat_buf.st_size;
385 LWS_VISIBLE const char *
386 lws_plat_inet_ntop(int af, const void *src, char *dst, int cnt)
388 return inet_ntop(af, src, dst, cnt);