3 int listen_backlog = LISTEN_BACKLOG;
4 size_t listen_fds_count = 0;
5 int listen_fds[MAX_LISTEN_FDS] = { [0 ... 99] = -1 };
6 char *listen_fds_names[MAX_LISTEN_FDS] = { [0 ... 99] = NULL };
7 int listen_port = LISTEN_PORT;
8 int web_server_mode = WEB_SERVER_MODE_MULTI_THREADED;
10 static int shown_server_socket_error = 0;
12 #ifdef NETDATA_INTERNAL_CHECKS
13 static void log_allocations(void)
15 #ifdef HAVE_C_MALLINFO
16 static int heap = 0, used = 0, mmap = 0;
21 if(mi.uordblks > used) {
24 for(w = web_clients; w ; w = w->next) clients++;
26 info("Allocated memory: used %d KB (+%d B), mmap %d KB (+%d B), heap %d KB (+%d B). %d web clients connected.",
39 #else /* ! HAVE_C_MALLINFO */
41 #endif /* ! HAVE_C_MALLINFO */
44 malloc_stats_print(NULL, NULL, NULL);
47 #endif /* NETDATA_INTERNAL_CHECKS */
50 int accept4(int sock, struct sockaddr *addr, socklen_t *addrlen, int flags) {
51 int fd = accept(sock, addr, addrlen);
54 if (fd < 0) return fd;
56 if (flags & SOCK_NONBLOCK) {
57 newflags |= O_NONBLOCK;
58 flags &= ~SOCK_NONBLOCK;
63 if (flags & SOCK_CLOEXEC) {
64 newflags |= O_CLOEXEC;
65 flags &= ~SOCK_CLOEXEC;
75 if (fcntl(fd, F_SETFL, newflags) < 0) {
76 int saved_errno = errno;
86 int create_listen_socket4(const char *ip, int port, int listen_backlog) {
90 debug(D_LISTENER, "IPv4 creating new listening socket on ip '%s' port %d", ip, port);
92 sock = socket(AF_INET, SOCK_STREAM, 0);
94 error("IPv4 socket() on ip '%s' port %d failed.", ip, port);
95 shown_server_socket_error = 1;
99 /* avoid "address already in use" */
100 if(setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void*)&sockopt, sizeof(sockopt)) != 0)
101 error("Cannot set SO_REUSEADDR on ip '%s' port's %d.", ip, port);
103 struct sockaddr_in name;
104 memset(&name, 0, sizeof(struct sockaddr_in));
105 name.sin_family = AF_INET;
106 name.sin_port = htons (port);
108 int ret = inet_pton(AF_INET, ip, (void *)&name.sin_addr.s_addr);
110 error("Failed to convert IP '%s' to a valid IPv4 address.", ip);
111 shown_server_socket_error = 1;
116 if(bind (sock, (struct sockaddr *) &name, sizeof (name)) < 0) {
118 error("IPv4 bind() on ip '%s' port %d failed.", ip, port);
119 shown_server_socket_error = 1;
123 if(listen(sock, listen_backlog) < 0) {
125 error("IPv4 listen() on ip '%s' port %d failed.", ip, port);
126 shown_server_socket_error = 1;
130 debug(D_LISTENER, "Listening on IPv4 ip '%s' port %d", ip, port);
134 int create_listen_socket6(const char *ip, int port, int listen_backlog) {
139 debug(D_LISTENER, "IPv6 creating new listening socket on ip '%s' port %d", ip, port);
141 sock = socket(AF_INET6, SOCK_STREAM, 0);
143 error("IPv6 socket() on ip '%s' port %d failed.", ip, port);
144 shown_server_socket_error = 1;
148 /* avoid "address already in use" */
149 if(setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void*)&sockopt, sizeof(sockopt)) != 0)
150 error("Cannot set SO_REUSEADDR on ip '%s' port's %d.", ip, port);
153 if(setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY, (void*)&ipv6only, sizeof(ipv6only)) != 0)
154 error("Cannot set IPV6_V6ONLY on ip '%s' port's %d.", ip, port);
156 struct sockaddr_in6 name;
157 memset(&name, 0, sizeof(struct sockaddr_in6));
158 name.sin6_family = AF_INET6;
159 name.sin6_port = htons ((uint16_t) port);
161 int ret = inet_pton(AF_INET6, ip, (void *)&name.sin6_addr.s6_addr);
163 error("Failed to convert IP '%s' to a valid IPv6 address.", ip);
164 shown_server_socket_error = 1;
169 name.sin6_scope_id = 0;
171 if (bind (sock, (struct sockaddr *) &name, sizeof (name)) < 0) {
173 error("IPv6 bind() on ip '%s' port %d failed.", ip, port);
174 shown_server_socket_error = 1;
178 if (listen(sock, listen_backlog) < 0) {
180 error("IPv6 listen() on ip '%s' port %d failed.", ip, port);
181 shown_server_socket_error = 1;
185 debug(D_LISTENER, "Listening on IPv6 ip '%s' port %d", ip, port);
189 static inline int add_listen_socket(int fd, const char *ip, int port) {
190 if(listen_fds_count >= MAX_LISTEN_FDS) {
191 error("Too many listening sockets. Failed to add listening socket at ip '%s' port %d", ip, port);
192 shown_server_socket_error = 1;
197 listen_fds[listen_fds_count] = fd;
199 char buffer[100 + 1];
200 snprintfz(buffer, 100, "[%s]:%d", ip, port);
201 listen_fds_names[listen_fds_count] = strdupz(buffer);
207 int is_listen_socket(int fd) {
209 for(i = 0; i < listen_fds_count ;i++)
210 if(listen_fds[i] == fd) return 1;
215 static inline void close_listen_sockets(void) {
217 for(i = 0; i < listen_fds_count ;i++) {
218 close(listen_fds[i]);
221 freez(listen_fds_names[i]);
222 listen_fds_names[i] = NULL;
225 listen_fds_count = 0;
228 static inline int bind_to_one(const char *definition, int default_port, int listen_backlog) {
230 struct addrinfo hints;
231 struct addrinfo *result = NULL, *rp = NULL;
233 char buffer[strlen(definition) + 1];
234 strcpy(buffer, definition);
236 char buffer2[10 + 1];
237 snprintfz(buffer2, 10, "%d", default_port);
239 char *ip = buffer, *port = buffer2;
244 while(*e && *e != ']') e++;
251 while(*e && *e != ':') e++;
259 if(!*ip || *ip == '*' || !strcmp(ip, "any") || !strcmp(ip, "all"))
264 memset(&hints, 0, sizeof(struct addrinfo));
265 hints.ai_family = AF_UNSPEC; /* Allow IPv4 or IPv6 */
266 hints.ai_socktype = SOCK_DGRAM; /* Datagram socket */
267 hints.ai_flags = AI_PASSIVE; /* For wildcard IP address */
268 hints.ai_protocol = 0; /* Any protocol */
269 hints.ai_canonname = NULL;
270 hints.ai_addr = NULL;
271 hints.ai_next = NULL;
273 int r = getaddrinfo(ip, port, &hints, &result);
275 error("getaddrinfo('%s', '%s'): %s\n", ip, port, gai_strerror(r));
279 for (rp = result; rp != NULL; rp = rp->ai_next) {
282 char rip[INET_ADDRSTRLEN + INET6_ADDRSTRLEN] = "INVALID";
283 int rport = default_port;
285 switch (rp->ai_addr->sa_family) {
287 struct sockaddr_in *sin = (struct sockaddr_in *) rp->ai_addr;
288 inet_ntop(AF_INET, &sin->sin_addr, rip, INET_ADDRSTRLEN);
289 rport = ntohs(sin->sin_port);
290 fd = create_listen_socket4(rip, rport, listen_backlog);
295 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) rp->ai_addr;
296 inet_ntop(AF_INET6, &sin6->sin6_addr, rip, INET6_ADDRSTRLEN);
297 rport = ntohs(sin6->sin6_port);
298 fd = create_listen_socket6(rip, rport, listen_backlog);
304 error("Cannot bind to ip '%s', port %d", rip, rport);
306 add_listen_socket(fd, rip, rport);
311 freeaddrinfo(result);
316 int create_listen_sockets(void) {
317 shown_server_socket_error = 0;
319 listen_backlog = (int) config_get_number("global", "http port listen backlog", LISTEN_BACKLOG);
321 if(config_exists("global", "bind socket to IP") && !config_exists("global", "bind to"))
322 config_rename("global", "bind socket to IP", "bind to");
324 if(config_exists("global", "port") && !config_exists("global", "default port"))
325 config_rename("global", "port", "default port");
327 listen_port = (int) config_get_number("global", "default port", LISTEN_PORT);
328 if(listen_port < 1 || listen_port > 65535) {
329 error("Invalid listen port %d given. Defaulting to %d.", listen_port, LISTEN_PORT);
330 listen_port = (int) config_set_number("global", "default port", LISTEN_PORT);
332 debug(D_OPTIONS, "Default listen port set to %d.", listen_port);
334 char *s = config_get("global", "bind to", "*");
338 // skip separators, moving both s(tart) and e(nd)
339 while(isspace(*e) || *e == ',') s = ++e;
341 // move e(nd) to the first separator
342 while(*e && !isspace(*e) && *e != ',') e++;
344 // is there anything?
345 if(!*s || s == e) break;
348 strncpyz(buf, s, e - s);
349 bind_to_one(buf, listen_port, listen_backlog);
354 if(!listen_fds_count)
355 fatal("Cannot listen on any socket. Exiting...");
356 else if(shown_server_socket_error) {
358 for(i = 0; i < listen_fds_count ;i++)
359 info("Listen socket %s opened.", listen_fds_names[i]);
362 return (int)listen_fds_count;
365 // --------------------------------------------------------------------------------------
366 // the main socket listener
368 static inline void cleanup_web_clients(void) {
369 struct web_client *w;
371 for (w = web_clients; w;) {
373 debug(D_WEB_CLIENT, "%llu: Removing client.", w->id);
374 // pthread_cancel(w->thread);
375 // pthread_join(w->thread, NULL);
376 w = web_client_free(w);
377 #ifdef NETDATA_INTERNAL_CHECKS
385 // 1. it accepts new incoming requests on our port
386 // 2. creates a new web_client for each connection received
387 // 3. spawns a new pthread to serve the client (this is optimal for keep-alive clients)
388 // 4. cleans up old web_clients that their pthreads have been exited
390 #define CLEANUP_EVERY_EVENTS 100
392 void *socket_listen_main_multi_threaded(void *ptr) {
393 struct netdata_static_thread *static_thread = (struct netdata_static_thread *)ptr;
395 web_server_mode = WEB_SERVER_MODE_MULTI_THREADED;
396 info("Multi-threaded WEB SERVER thread created with task id %d", gettid());
398 struct web_client *w;
399 int retval, counter = 0;
401 if(pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0)
402 error("Cannot set pthread cancel type to DEFERRED.");
404 if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
405 error("Cannot set pthread cancel state to ENABLE.");
407 if(!listen_fds_count)
408 fatal("LISTENER: No sockets to listen to.");
410 struct pollfd *fds = callocz(sizeof(struct pollfd), listen_fds_count);
413 for(i = 0; i < listen_fds_count ;i++) {
414 fds[i].fd = listen_fds[i];
415 fds[i].events = POLLIN;
418 info("Listening on '%s'", (listen_fds_names[i])?listen_fds_names[i]:"UNKNOWN");
421 int timeout = 10 * 1000;
424 // debug(D_WEB_CLIENT, "LISTENER: Waiting...");
425 retval = poll(fds, listen_fds_count, timeout);
427 if(unlikely(retval == -1)) {
428 error("LISTENER: poll() failed.");
431 else if(unlikely(!retval)) {
432 debug(D_WEB_CLIENT, "LISTENER: select() timeout.");
434 cleanup_web_clients();
438 for(i = 0 ; i < listen_fds_count ; i++) {
439 short int revents = fds[i].revents;
441 // check for new incoming connections
442 if(revents & POLLIN || revents & POLLPRI) {
445 w = web_client_create(fds[i].fd);
447 // no need for error log - web_client_create already logged the error
451 if(pthread_create(&w->thread, NULL, web_client_main, w) != 0) {
452 error("%llu: failed to create new thread for web client.", w->id);
455 else if(pthread_detach(w->thread) != 0) {
456 error("%llu: Cannot request detach of newly created web client thread.", w->id);
462 // cleanup unused clients
464 if(counter >= CLEANUP_EVERY_EVENTS) {
466 cleanup_web_clients();
470 debug(D_WEB_CLIENT, "LISTENER: exit!");
471 close_listen_sockets();
475 static_thread->enabled = 0;
480 struct web_client *single_threaded_clients[FD_SETSIZE];
482 static inline int single_threaded_link_client(struct web_client *w, fd_set *ifds, fd_set *ofds, fd_set *efds, int *max) {
483 if(unlikely(w->obsolete || w->dead || (!w->wait_receive && !w->wait_send)))
486 if(unlikely(w->ifd < 0 || w->ifd >= FD_SETSIZE || w->ofd < 0 || w->ofd >= FD_SETSIZE)) {
487 error("%llu: invalid file descriptor, ifd = %d, ofd = %d (required 0 <= fd < FD_SETSIZE (%d)", w->id, w->ifd, w->ofd, FD_SETSIZE);
491 FD_SET(w->ifd, efds);
492 if(unlikely(*max < w->ifd)) *max = w->ifd;
494 if(unlikely(w->ifd != w->ofd)) {
495 if(*max < w->ofd) *max = w->ofd;
496 FD_SET(w->ofd, efds);
499 if(w->wait_receive) FD_SET(w->ifd, ifds);
500 if(w->wait_send) FD_SET(w->ofd, ofds);
502 single_threaded_clients[w->ifd] = w;
503 single_threaded_clients[w->ofd] = w;
508 static inline int single_threaded_unlink_client(struct web_client *w, fd_set *ifds, fd_set *ofds, fd_set *efds) {
509 FD_CLR(w->ifd, efds);
510 if(unlikely(w->ifd != w->ofd)) FD_CLR(w->ofd, efds);
512 if(w->wait_receive) FD_CLR(w->ifd, ifds);
513 if(w->wait_send) FD_CLR(w->ofd, ofds);
515 single_threaded_clients[w->ifd] = NULL;
516 single_threaded_clients[w->ofd] = NULL;
518 if(unlikely(w->obsolete || w->dead || (!w->wait_receive && !w->wait_send)))
524 void *socket_listen_main_single_threaded(void *ptr) {
525 struct netdata_static_thread *static_thread = (struct netdata_static_thread *)ptr;
527 web_server_mode = WEB_SERVER_MODE_SINGLE_THREADED;
529 info("Single-threaded WEB SERVER thread created with task id %d", gettid());
531 struct web_client *w;
534 if(pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0)
535 error("Cannot set pthread cancel type to DEFERRED.");
537 if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
538 error("Cannot set pthread cancel state to ENABLE.");
540 if(!listen_fds_count)
541 fatal("LISTENER: no listen sockets available.");
544 for(i = 0; i < FD_SETSIZE ; i++)
545 single_threaded_clients[i] = NULL;
547 fd_set ifds, ofds, efds, rifds, rofds, refds;
553 for(i = 0; i < listen_fds_count ; i++) {
554 if (listen_fds[i] < 0 || listen_fds[i] >= FD_SETSIZE)
555 fatal("LISTENER: Listen socket %d is not ready, or invalid.", listen_fds[i]);
557 info("Listening on '%s'", (listen_fds_names[i])?listen_fds_names[i]:"UNKNOWN");
559 FD_SET(listen_fds[i], &ifds);
560 FD_SET(listen_fds[i], &efds);
561 if(fdmax < listen_fds[i])
562 fdmax = listen_fds[i];
566 debug(D_WEB_CLIENT_ACCESS, "LISTENER: single threaded web server waiting (fdmax = %d)...", fdmax);
568 struct timeval tv = { .tv_sec = 1, .tv_usec = 0 };
572 retval = select(fdmax+1, &rifds, &rofds, &refds, &tv);
574 if(unlikely(retval == -1)) {
575 error("LISTENER: select() failed.");
578 else if(likely(retval)) {
579 debug(D_WEB_CLIENT_ACCESS, "LISTENER: got something.");
581 for(i = 0; i < listen_fds_count ; i++) {
582 if (FD_ISSET(listen_fds[i], &rifds)) {
583 debug(D_WEB_CLIENT_ACCESS, "LISTENER: new connection.");
584 w = web_client_create(listen_fds[i]);
585 if (single_threaded_link_client(w, &ifds, &ofds, &ifds, &fdmax) != 0) {
591 for(i = 0 ; i <= (size_t)fdmax ; i++) {
592 if(likely(!FD_ISSET(i, &rifds) && !FD_ISSET(i, &rofds) && !FD_ISSET(i, &refds)))
595 w = single_threaded_clients[i];
599 if(unlikely(single_threaded_unlink_client(w, &ifds, &ofds, &efds) != 0)) {
604 if (unlikely(FD_ISSET(w->ifd, &refds) || FD_ISSET(w->ofd, &refds))) {
609 if (unlikely(w->wait_receive && FD_ISSET(w->ifd, &rifds))) {
610 if (unlikely(web_client_receive(w) < 0)) {
615 if (w->mode != WEB_CLIENT_MODE_FILECOPY) {
616 debug(D_WEB_CLIENT, "%llu: Processing received data.", w->id);
617 web_client_process(w);
621 if (unlikely(w->wait_send && FD_ISSET(w->ofd, &rofds))) {
622 if (unlikely(web_client_send(w) < 0)) {
623 debug(D_WEB_CLIENT, "%llu: Cannot send data to client. Closing client.", w->id);
629 if(unlikely(single_threaded_link_client(w, &ifds, &ofds, &efds, &fdmax) != 0)) {
635 debug(D_WEB_CLIENT_ACCESS, "LISTENER: single threaded web server timeout.");
636 #ifdef NETDATA_INTERNAL_CHECKS
642 debug(D_WEB_CLIENT, "LISTENER: exit!");
643 close_listen_sockets();
645 static_thread->enabled = 0;