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;
9 WEB_SERVER_MODE web_server_mode = WEB_SERVER_MODE_MULTI_THREADED;
11 static int shown_server_socket_error = 0;
13 #ifdef NETDATA_INTERNAL_CHECKS
14 static void log_allocations(void)
16 #ifdef HAVE_C_MALLINFO
17 static int heap = 0, used = 0, mmap = 0;
22 if(mi.uordblks > used) {
25 for(w = web_clients; w ; w = w->next) clients++;
27 info("Allocated memory: used %d KB (+%d B), mmap %d KB (+%d B), heap %d KB (+%d B). %d web clients connected.",
40 #else /* ! HAVE_C_MALLINFO */
42 #endif /* ! HAVE_C_MALLINFO */
45 malloc_stats_print(NULL, NULL, NULL);
48 #endif /* NETDATA_INTERNAL_CHECKS */
51 int accept4(int sock, struct sockaddr *addr, socklen_t *addrlen, int flags) {
52 int fd = accept(sock, addr, addrlen);
55 if (fd < 0) return fd;
57 if (flags & SOCK_NONBLOCK) {
58 newflags |= O_NONBLOCK;
59 flags &= ~SOCK_NONBLOCK;
64 if (flags & SOCK_CLOEXEC) {
65 newflags |= O_CLOEXEC;
66 flags &= ~SOCK_CLOEXEC;
76 if (fcntl(fd, F_SETFL, newflags) < 0) {
77 int saved_errno = errno;
87 WEB_SERVER_MODE web_server_mode_id(const char *mode) {
88 if(!strcmp(mode, "none"))
89 return WEB_SERVER_MODE_NONE;
90 else if(!strcmp(mode, "single") || !strcmp(mode, "single-threaded"))
91 return WEB_SERVER_MODE_SINGLE_THREADED;
92 else // if(!strcmp(mode, "multi") || !strcmp(mode, "multi-threaded"))
93 return WEB_SERVER_MODE_MULTI_THREADED;
96 const char *web_server_mode_name(WEB_SERVER_MODE id) {
98 case WEB_SERVER_MODE_NONE:
101 case WEB_SERVER_MODE_SINGLE_THREADED:
102 return "single-threaded";
105 case WEB_SERVER_MODE_MULTI_THREADED:
106 return "multi-threaded";
110 int create_listen_socket4(const char *ip, int port, int listen_backlog) {
114 debug(D_LISTENER, "IPv4 creating new listening socket on ip '%s' port %d", ip, port);
116 sock = socket(AF_INET, SOCK_STREAM, 0);
118 error("IPv4 socket() on ip '%s' port %d failed.", ip, port);
119 shown_server_socket_error = 1;
123 /* avoid "address already in use" */
124 if(setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void*)&sockopt, sizeof(sockopt)) != 0)
125 error("Cannot set SO_REUSEADDR on ip '%s' port's %d.", ip, port);
127 struct sockaddr_in name;
128 memset(&name, 0, sizeof(struct sockaddr_in));
129 name.sin_family = AF_INET;
130 name.sin_port = htons (port);
132 int ret = inet_pton(AF_INET, ip, (void *)&name.sin_addr.s_addr);
134 error("Failed to convert IP '%s' to a valid IPv4 address.", ip);
135 shown_server_socket_error = 1;
140 if(bind (sock, (struct sockaddr *) &name, sizeof (name)) < 0) {
142 error("IPv4 bind() on ip '%s' port %d failed.", ip, port);
143 shown_server_socket_error = 1;
147 if(listen(sock, listen_backlog) < 0) {
149 error("IPv4 listen() on ip '%s' port %d failed.", ip, port);
150 shown_server_socket_error = 1;
154 debug(D_LISTENER, "Listening on IPv4 ip '%s' port %d", ip, port);
158 int create_listen_socket6(const char *ip, int port, int listen_backlog) {
163 debug(D_LISTENER, "IPv6 creating new listening socket on ip '%s' port %d", ip, port);
165 sock = socket(AF_INET6, SOCK_STREAM, 0);
167 error("IPv6 socket() on ip '%s' port %d failed.", ip, port);
168 shown_server_socket_error = 1;
172 /* avoid "address already in use" */
173 if(setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void*)&sockopt, sizeof(sockopt)) != 0)
174 error("Cannot set SO_REUSEADDR on ip '%s' port's %d.", ip, port);
177 if(setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY, (void*)&ipv6only, sizeof(ipv6only)) != 0)
178 error("Cannot set IPV6_V6ONLY on ip '%s' port's %d.", ip, port);
180 struct sockaddr_in6 name;
181 memset(&name, 0, sizeof(struct sockaddr_in6));
182 name.sin6_family = AF_INET6;
183 name.sin6_port = htons ((uint16_t) port);
185 int ret = inet_pton(AF_INET6, ip, (void *)&name.sin6_addr.s6_addr);
187 error("Failed to convert IP '%s' to a valid IPv6 address.", ip);
188 shown_server_socket_error = 1;
193 name.sin6_scope_id = 0;
195 if (bind (sock, (struct sockaddr *) &name, sizeof (name)) < 0) {
197 error("IPv6 bind() on ip '%s' port %d failed.", ip, port);
198 shown_server_socket_error = 1;
202 if (listen(sock, listen_backlog) < 0) {
204 error("IPv6 listen() on ip '%s' port %d failed.", ip, port);
205 shown_server_socket_error = 1;
209 debug(D_LISTENER, "Listening on IPv6 ip '%s' port %d", ip, port);
213 static inline int add_listen_socket(int fd, const char *ip, int port) {
214 if(listen_fds_count >= MAX_LISTEN_FDS) {
215 error("Too many listening sockets. Failed to add listening socket at ip '%s' port %d", ip, port);
216 shown_server_socket_error = 1;
221 listen_fds[listen_fds_count] = fd;
223 char buffer[100 + 1];
224 snprintfz(buffer, 100, "[%s]:%d", ip, port);
225 listen_fds_names[listen_fds_count] = strdupz(buffer);
231 int is_listen_socket(int fd) {
233 for(i = 0; i < listen_fds_count ;i++)
234 if(listen_fds[i] == fd) return 1;
239 static inline void close_listen_sockets(void) {
241 for(i = 0; i < listen_fds_count ;i++) {
242 close(listen_fds[i]);
245 freez(listen_fds_names[i]);
246 listen_fds_names[i] = NULL;
249 listen_fds_count = 0;
252 static inline int bind_to_one(const char *definition, int default_port, int listen_backlog) {
254 struct addrinfo hints;
255 struct addrinfo *result = NULL, *rp = NULL;
257 char buffer[strlen(definition) + 1];
258 strcpy(buffer, definition);
260 char buffer2[10 + 1];
261 snprintfz(buffer2, 10, "%d", default_port);
263 char *ip = buffer, *port = buffer2;
268 while(*e && *e != ']') e++;
275 while(*e && *e != ':') e++;
283 if(!*ip || *ip == '*' || !strcmp(ip, "any") || !strcmp(ip, "all"))
288 memset(&hints, 0, sizeof(struct addrinfo));
289 hints.ai_family = AF_UNSPEC; /* Allow IPv4 or IPv6 */
290 hints.ai_socktype = SOCK_DGRAM; /* Datagram socket */
291 hints.ai_flags = AI_PASSIVE; /* For wildcard IP address */
292 hints.ai_protocol = 0; /* Any protocol */
293 hints.ai_canonname = NULL;
294 hints.ai_addr = NULL;
295 hints.ai_next = NULL;
297 int r = getaddrinfo(ip, port, &hints, &result);
299 error("getaddrinfo('%s', '%s'): %s\n", ip, port, gai_strerror(r));
303 for (rp = result; rp != NULL; rp = rp->ai_next) {
306 char rip[INET_ADDRSTRLEN + INET6_ADDRSTRLEN] = "INVALID";
307 int rport = default_port;
309 switch (rp->ai_addr->sa_family) {
311 struct sockaddr_in *sin = (struct sockaddr_in *) rp->ai_addr;
312 inet_ntop(AF_INET, &sin->sin_addr, rip, INET_ADDRSTRLEN);
313 rport = ntohs(sin->sin_port);
314 fd = create_listen_socket4(rip, rport, listen_backlog);
319 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) rp->ai_addr;
320 inet_ntop(AF_INET6, &sin6->sin6_addr, rip, INET6_ADDRSTRLEN);
321 rport = ntohs(sin6->sin6_port);
322 fd = create_listen_socket6(rip, rport, listen_backlog);
328 error("Cannot bind to ip '%s', port %d", rip, rport);
330 add_listen_socket(fd, rip, rport);
335 freeaddrinfo(result);
340 int create_listen_sockets(void) {
341 shown_server_socket_error = 0;
343 listen_backlog = (int) config_get_number(CONFIG_SECTION_WEB, "listen backlog", LISTEN_BACKLOG);
345 listen_port = (int) config_get_number(CONFIG_SECTION_WEB, "default port", LISTEN_PORT);
346 if(listen_port < 1 || listen_port > 65535) {
347 error("Invalid listen port %d given. Defaulting to %d.", listen_port, LISTEN_PORT);
348 listen_port = (int) config_set_number(CONFIG_SECTION_WEB, "default port", LISTEN_PORT);
350 debug(D_OPTIONS, "Default listen port set to %d.", listen_port);
352 char *s = config_get(CONFIG_SECTION_WEB, "bind to", "*");
356 // skip separators, moving both s(tart) and e(nd)
357 while(isspace(*e) || *e == ',') s = ++e;
359 // move e(nd) to the first separator
360 while(*e && !isspace(*e) && *e != ',') e++;
362 // is there anything?
363 if(!*s || s == e) break;
366 strncpyz(buf, s, e - s);
367 bind_to_one(buf, listen_port, listen_backlog);
372 if(!listen_fds_count)
373 fatal("Cannot listen on any socket. Exiting...");
374 else if(shown_server_socket_error) {
376 for(i = 0; i < listen_fds_count ;i++)
377 info("Listen socket %s opened.", listen_fds_names[i]);
380 return (int)listen_fds_count;
383 // --------------------------------------------------------------------------------------
384 // the main socket listener
386 static inline void cleanup_web_clients(void) {
387 struct web_client *w;
389 for (w = web_clients; w;) {
391 debug(D_WEB_CLIENT, "%llu: Removing client.", w->id);
392 // pthread_cancel(w->thread);
393 // pthread_join(w->thread, NULL);
394 w = web_client_free(w);
395 #ifdef NETDATA_INTERNAL_CHECKS
403 // 1. it accepts new incoming requests on our port
404 // 2. creates a new web_client for each connection received
405 // 3. spawns a new pthread to serve the client (this is optimal for keep-alive clients)
406 // 4. cleans up old web_clients that their pthreads have been exited
408 #define CLEANUP_EVERY_EVENTS 100
410 void *socket_listen_main_multi_threaded(void *ptr) {
411 struct netdata_static_thread *static_thread = (struct netdata_static_thread *)ptr;
413 web_server_mode = WEB_SERVER_MODE_MULTI_THREADED;
414 info("Multi-threaded WEB SERVER thread created with task id %d", gettid());
416 struct web_client *w;
417 int retval, counter = 0;
419 if(pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0)
420 error("Cannot set pthread cancel type to DEFERRED.");
422 if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
423 error("Cannot set pthread cancel state to ENABLE.");
425 if(!listen_fds_count)
426 fatal("LISTENER: No sockets to listen to.");
428 struct pollfd *fds = callocz(sizeof(struct pollfd), listen_fds_count);
431 for(i = 0; i < listen_fds_count ;i++) {
432 fds[i].fd = listen_fds[i];
433 fds[i].events = POLLIN;
436 info("Listening on '%s'", (listen_fds_names[i])?listen_fds_names[i]:"UNKNOWN");
439 int timeout = 10 * 1000;
442 // debug(D_WEB_CLIENT, "LISTENER: Waiting...");
443 retval = poll(fds, listen_fds_count, timeout);
445 if(unlikely(retval == -1)) {
446 error("LISTENER: poll() failed.");
449 else if(unlikely(!retval)) {
450 debug(D_WEB_CLIENT, "LISTENER: select() timeout.");
452 cleanup_web_clients();
456 for(i = 0 ; i < listen_fds_count ; i++) {
457 short int revents = fds[i].revents;
459 // check for new incoming connections
460 if(revents & POLLIN || revents & POLLPRI) {
463 w = web_client_create(fds[i].fd);
465 // no need for error log - web_client_create already logged the error
469 if(pthread_create(&w->thread, NULL, web_client_main, w) != 0) {
470 error("%llu: failed to create new thread for web client.", w->id);
473 else if(pthread_detach(w->thread) != 0) {
474 error("%llu: Cannot request detach of newly created web client thread.", w->id);
480 // cleanup unused clients
482 if(counter >= CLEANUP_EVERY_EVENTS) {
484 cleanup_web_clients();
488 debug(D_WEB_CLIENT, "LISTENER: exit!");
489 close_listen_sockets();
493 static_thread->enabled = 0;
498 struct web_client *single_threaded_clients[FD_SETSIZE];
500 static inline int single_threaded_link_client(struct web_client *w, fd_set *ifds, fd_set *ofds, fd_set *efds, int *max) {
501 if(unlikely(w->obsolete || w->dead || (!w->wait_receive && !w->wait_send)))
504 if(unlikely(w->ifd < 0 || w->ifd >= FD_SETSIZE || w->ofd < 0 || w->ofd >= FD_SETSIZE)) {
505 error("%llu: invalid file descriptor, ifd = %d, ofd = %d (required 0 <= fd < FD_SETSIZE (%d)", w->id, w->ifd, w->ofd, FD_SETSIZE);
509 FD_SET(w->ifd, efds);
510 if(unlikely(*max < w->ifd)) *max = w->ifd;
512 if(unlikely(w->ifd != w->ofd)) {
513 if(*max < w->ofd) *max = w->ofd;
514 FD_SET(w->ofd, efds);
517 if(w->wait_receive) FD_SET(w->ifd, ifds);
518 if(w->wait_send) FD_SET(w->ofd, ofds);
520 single_threaded_clients[w->ifd] = w;
521 single_threaded_clients[w->ofd] = w;
526 static inline int single_threaded_unlink_client(struct web_client *w, fd_set *ifds, fd_set *ofds, fd_set *efds) {
527 FD_CLR(w->ifd, efds);
528 if(unlikely(w->ifd != w->ofd)) FD_CLR(w->ofd, efds);
530 if(w->wait_receive) FD_CLR(w->ifd, ifds);
531 if(w->wait_send) FD_CLR(w->ofd, ofds);
533 single_threaded_clients[w->ifd] = NULL;
534 single_threaded_clients[w->ofd] = NULL;
536 if(unlikely(w->obsolete || w->dead || (!w->wait_receive && !w->wait_send)))
542 void *socket_listen_main_single_threaded(void *ptr) {
543 struct netdata_static_thread *static_thread = (struct netdata_static_thread *)ptr;
545 web_server_mode = WEB_SERVER_MODE_SINGLE_THREADED;
547 info("Single-threaded WEB SERVER thread created with task id %d", gettid());
549 struct web_client *w;
552 if(pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0)
553 error("Cannot set pthread cancel type to DEFERRED.");
555 if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
556 error("Cannot set pthread cancel state to ENABLE.");
558 if(!listen_fds_count)
559 fatal("LISTENER: no listen sockets available.");
562 for(i = 0; i < FD_SETSIZE ; i++)
563 single_threaded_clients[i] = NULL;
565 fd_set ifds, ofds, efds, rifds, rofds, refds;
571 for(i = 0; i < listen_fds_count ; i++) {
572 if (listen_fds[i] < 0 || listen_fds[i] >= FD_SETSIZE)
573 fatal("LISTENER: Listen socket %d is not ready, or invalid.", listen_fds[i]);
575 info("Listening on '%s'", (listen_fds_names[i])?listen_fds_names[i]:"UNKNOWN");
577 FD_SET(listen_fds[i], &ifds);
578 FD_SET(listen_fds[i], &efds);
579 if(fdmax < listen_fds[i])
580 fdmax = listen_fds[i];
584 debug(D_WEB_CLIENT_ACCESS, "LISTENER: single threaded web server waiting (fdmax = %d)...", fdmax);
586 struct timeval tv = { .tv_sec = 1, .tv_usec = 0 };
590 retval = select(fdmax+1, &rifds, &rofds, &refds, &tv);
592 if(unlikely(retval == -1)) {
593 error("LISTENER: select() failed.");
596 else if(likely(retval)) {
597 debug(D_WEB_CLIENT_ACCESS, "LISTENER: got something.");
599 for(i = 0; i < listen_fds_count ; i++) {
600 if (FD_ISSET(listen_fds[i], &rifds)) {
601 debug(D_WEB_CLIENT_ACCESS, "LISTENER: new connection.");
602 w = web_client_create(listen_fds[i]);
603 if (single_threaded_link_client(w, &ifds, &ofds, &ifds, &fdmax) != 0) {
609 for(i = 0 ; i <= (size_t)fdmax ; i++) {
610 if(likely(!FD_ISSET(i, &rifds) && !FD_ISSET(i, &rofds) && !FD_ISSET(i, &refds)))
613 w = single_threaded_clients[i];
617 if(unlikely(single_threaded_unlink_client(w, &ifds, &ofds, &efds) != 0)) {
622 if (unlikely(FD_ISSET(w->ifd, &refds) || FD_ISSET(w->ofd, &refds))) {
627 if (unlikely(w->wait_receive && FD_ISSET(w->ifd, &rifds))) {
628 if (unlikely(web_client_receive(w) < 0)) {
633 if (w->mode != WEB_CLIENT_MODE_FILECOPY) {
634 debug(D_WEB_CLIENT, "%llu: Processing received data.", w->id);
635 web_client_process_request(w);
639 if (unlikely(w->wait_send && FD_ISSET(w->ofd, &rofds))) {
640 if (unlikely(web_client_send(w) < 0)) {
641 debug(D_WEB_CLIENT, "%llu: Cannot send data to client. Closing client.", w->id);
647 if(unlikely(single_threaded_link_client(w, &ifds, &ofds, &efds, &fdmax) != 0)) {
653 debug(D_WEB_CLIENT_ACCESS, "LISTENER: single threaded web server timeout.");
654 #ifdef NETDATA_INTERNAL_CHECKS
660 debug(D_WEB_CLIENT, "LISTENER: exit!");
661 close_listen_sockets();
663 static_thread->enabled = 0;