diff options
Diffstat (limited to 'src/web_server.c')
| -rw-r--r-- | src/web_server.c | 803 |
1 files changed, 567 insertions, 236 deletions
diff --git a/src/web_server.c b/src/web_server.c index 0da72b5b..cf3687f3 100644 --- a/src/web_server.c +++ b/src/web_server.c @@ -1,270 +1,601 @@ -#ifdef HAVE_CONFIG_H -#include <config.h> -#endif -#include <unistd.h> -#include <stdlib.h> -#include <sys/types.h> -#include <sys/socket.h> -#include <netinet/in.h> -#include <arpa/inet.h> -#include <errno.h> -#include <pthread.h> -#include <sys/stat.h> -#include <fcntl.h> -#include <netinet/tcp.h> -#include <malloc.h> - #include "common.h" -#include "log.h" -#include "appconfig.h" -#include "url.h" -#include "web_buffer.h" -#include "web_client.h" -#include "web_server.h" -#include "global_statistics.h" -#include "rrd.h" -#include "rrd2json.h" -#include "../config.h" int listen_backlog = LISTEN_BACKLOG; - -int listen_fd = -1; +size_t listen_fds_count = 0; +int listen_fds[MAX_LISTEN_FDS] = { [0 ... 99] = -1 }; +char *listen_fds_names[MAX_LISTEN_FDS] = { [0 ... 99] = NULL }; int listen_port = LISTEN_PORT; +int web_server_mode = WEB_SERVER_MODE_MULTI_THREADED; #ifdef NETDATA_INTERNAL_CHECKS static void log_allocations(void) { - static int mem = 0; + static int mem = 0; - struct mallinfo mi; + struct mallinfo mi; - mi = mallinfo(); - if(mi.uordblks > mem) { - int clients = 0; - struct web_client *w; - for(w = web_clients; w ; w = w->next) clients++; + mi = mallinfo(); + if(mi.uordblks > mem) { + int clients = 0; + struct web_client *w; + for(w = web_clients; w ; w = w->next) clients++; - info("Allocated memory increased from %d to %d (increased by %d bytes). There are %d web clients connected.", mem, mi.uordblks, mi.uordblks - mem, clients); - mem = mi.uordblks; - } + info("Allocated memory increased from %d to %d (increased by %d bytes). There are %d web clients connected.", mem, mi.uordblks, mi.uordblks - mem, clients); + mem = mi.uordblks; + } } #endif -static int is_ip_anything(const char *ip) -{ - if(!ip || !*ip - || !strcmp(ip, "any") - || !strcmp(ip, "all") - || !strcmp(ip, "*") - || !strcmp(ip, "::") - || !strcmp(ip, "0.0.0.0") - ) return 1; - - return 0; +#ifndef HAVE_ACCEPT4 +int accept4(int sock, struct sockaddr *addr, socklen_t *addrlen, int flags) { + int fd = accept(sock, addr, addrlen); + int newflags = 0; + + if (fd < 0) return fd; + + if (flags & SOCK_NONBLOCK) { + newflags |= O_NONBLOCK; + flags &= ~SOCK_NONBLOCK; + } + + if (flags & SOCK_CLOEXEC) { + newflags |= O_CLOEXEC; + flags &= ~SOCK_CLOEXEC; + } + + if (flags) { + errno = -EINVAL; + return -1; + } + + if (fcntl(fd, F_SETFL, newflags) < 0) { + int saved_errno = errno; + close(fd); + errno = saved_errno; + return -1; + } + + return fd; } +#endif -int create_listen_socket4(const char *ip, int port, int listen_backlog) -{ - int sock; - int sockopt = 1; - - debug(D_LISTENER, "IPv4 creating new listening socket on port %d", port); - - sock = socket(AF_INET, SOCK_STREAM, 0); - if(sock < 0) { - error("IPv4 socket() failed."); - return -1; - } - - /* avoid "address already in use" */ - setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void*)&sockopt, sizeof(sockopt)); - - struct sockaddr_in name; - memset(&name, 0, sizeof(struct sockaddr_in)); - name.sin_family = AF_INET; - name.sin_port = htons (port); - - if(is_ip_anything(ip)) { - name.sin_addr.s_addr = htonl(INADDR_ANY); - info("Listening on any IPs (IPv4)."); - } - else { - int ret = inet_pton(AF_INET, ip, (void *)&name.sin_addr.s_addr); - if(ret != 1) { - error("Failed to convert IP '%s' to a valid IPv4 address.", ip); - close(sock); - return -1; - } - info("Listening on IP '%s' (IPv4).", ip); - } - - if(bind (sock, (struct sockaddr *) &name, sizeof (name)) < 0) { - close(sock); - error("IPv4 bind() failed."); - return -1; - } - - if(listen(sock, listen_backlog) < 0) { - close(sock); - fatal("IPv4 listen() failed."); - return -1; - } - - debug(D_LISTENER, "IPv4 listening port %d created", port); - return sock; +int create_listen_socket4(const char *ip, int port, int listen_backlog) { + int sock; + int sockopt = 1; + + debug(D_LISTENER, "IPv4 creating new listening socket on ip '%s' port %d", ip, port); + + sock = socket(AF_INET, SOCK_STREAM, 0); + if(sock < 0) { + error("IPv4 socket() on ip '%s' port %d failed.", ip, port); + return -1; + } + + /* avoid "address already in use" */ + if(setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void*)&sockopt, sizeof(sockopt)) != 0) + error("Cannot set SO_REUSEADDR on ip '%s' port's %d.", ip, port); + + struct sockaddr_in name; + memset(&name, 0, sizeof(struct sockaddr_in)); + name.sin_family = AF_INET; + name.sin_port = htons (port); + + int ret = inet_pton(AF_INET, ip, (void *)&name.sin_addr.s_addr); + if(ret != 1) { + error("Failed to convert IP '%s' to a valid IPv4 address.", ip); + close(sock); + return -1; + } + + if(bind (sock, (struct sockaddr *) &name, sizeof (name)) < 0) { + close(sock); + error("IPv4 bind() on ip '%s' port %d failed.", ip, port); + return -1; + } + + if(listen(sock, listen_backlog) < 0) { + close(sock); + fatal("IPv4 listen() on ip '%s' port %d failed.", ip, port); + return -1; + } + + debug(D_LISTENER, "Listening on IPv4 ip '%s' port %d", ip, port); + return sock; } -int create_listen_socket6(const char *ip, int port, int listen_backlog) -{ - int sock = -1; - int sockopt = 1; - - debug(D_LISTENER, "IPv6 creating new listening socket on port %d", port); - - sock = socket(AF_INET6, SOCK_STREAM, 0); - if (sock < 0) { - error("IPv6 socket() failed. Disabling IPv6."); - return -1; - } - - /* avoid "address already in use" */ - setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void*)&sockopt, sizeof(sockopt)); - - struct sockaddr_in6 name; - memset(&name, 0, sizeof(struct sockaddr_in6)); - name.sin6_family = AF_INET6; - name.sin6_port = htons ((uint16_t) port); - - if(is_ip_anything(ip)) { - name.sin6_addr = in6addr_any; - info("Listening on all IPs (IPv6 and IPv4)"); - } - else { - int ret = inet_pton(AF_INET6, ip, (void *)&name.sin6_addr.s6_addr); - if(ret != 1) { - error("Failed to convert IP '%s' to a valid IPv6 address. Disabling IPv6.", ip); - close(sock); - return -1; - } - info("Listening on IP '%s' (IPv6)", ip); - } - - name.sin6_scope_id = 0; - - if (bind (sock, (struct sockaddr *) &name, sizeof (name)) < 0) { - close(sock); - error("IPv6 bind() failed. Disabling IPv6."); - return -1; - } - - if (listen(sock, listen_backlog) < 0) { - close(sock); - error("IPv6 listen() failed. Disabling IPv6."); - return -1; - } - - debug(D_LISTENER, "IPv6 listening port %d created", port); - return sock; +int create_listen_socket6(const char *ip, int port, int listen_backlog) { + int sock = -1; + int sockopt = 1; + int ipv6only = 1; + + debug(D_LISTENER, "IPv6 creating new listening socket on ip '%s' port %d", ip, port); + + sock = socket(AF_INET6, SOCK_STREAM, 0); + if (sock < 0) { + error("IPv6 socket() on ip '%s' port %d failed.", ip, port); + return -1; + } + + /* avoid "address already in use" */ + if(setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void*)&sockopt, sizeof(sockopt)) != 0) + error("Cannot set SO_REUSEADDR on ip '%s' port's %d.", ip, port); + + /* IPv6 only */ + if(setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY, (void*)&ipv6only, sizeof(ipv6only)) != 0) + error("Cannot set IPV6_V6ONLY on ip '%s' port's %d.", ip, port); + + struct sockaddr_in6 name; + memset(&name, 0, sizeof(struct sockaddr_in6)); + name.sin6_family = AF_INET6; + name.sin6_port = htons ((uint16_t) port); + + int ret = inet_pton(AF_INET6, ip, (void *)&name.sin6_addr.s6_addr); + if(ret != 1) { + error("Failed to convert IP '%s' to a valid IPv6 address.", ip); + close(sock); + return -1; + } + + name.sin6_scope_id = 0; + + if (bind (sock, (struct sockaddr *) &name, sizeof (name)) < 0) { + close(sock); + error("IPv6 bind() on ip '%s' port %d failed.", ip, port); + return -1; + } + + if (listen(sock, listen_backlog) < 0) { + close(sock); + error("IPv6 listen() on ip '%s' port %d failed.", ip, port); + return -1; + } + + debug(D_LISTENER, "Listening on IPv6 ip '%s' port %d", ip, port); + return sock; +} + +static inline int add_listen_socket(int fd, const char *ip, int port) { + if(listen_fds_count >= MAX_LISTEN_FDS) { + error("Too many listening sockets. Failed to add listening socket at ip '%s' port %d", ip, port); + close(fd); + return -1; + } + + listen_fds[listen_fds_count] = fd; + + char buffer[100 + 1]; + snprintfz(buffer, 100, "[%s]:%d", ip, port); + listen_fds_names[listen_fds_count] = strdupz(buffer); + + listen_fds_count++; + return 0; +} + +int is_listen_socket(int fd) { + size_t i; + for(i = 0; i < listen_fds_count ;i++) + if(listen_fds[i] == fd) return 1; + + return 0; +} + +static inline void close_listen_sockets(void) { + size_t i; + for(i = 0; i < listen_fds_count ;i++) { + close(listen_fds[i]); + listen_fds[i] = -1; + + freez(listen_fds_names[i]); + listen_fds_names[i] = NULL; + } + + listen_fds_count = 0; +} + +static inline int bind_to_one(const char *definition, int default_port, int listen_backlog) { + int added = 0; + struct addrinfo hints; + struct addrinfo *result = NULL, *rp = NULL; + + char buffer[strlen(definition) + 1]; + strcpy(buffer, definition); + + char buffer2[10 + 1]; + snprintfz(buffer2, 10, "%d", default_port); + + char *ip = buffer, *port = buffer2; + + char *e = ip; + if(*e == '[') { + e = ++ip; + while(*e && *e != ']') e++; + if(*e == ']') { + *e = '\0'; + e++; + } + } + else { + while(*e && *e != ':') e++; + } + + if(*e == ':') { + port = e + 1; + *e = '\0'; + } + + if(!*ip || *ip == '*' || !strcmp(ip, "any") || !strcmp(ip, "all")) + ip = NULL; + if(!*port) + port = buffer2; + + memset(&hints, 0, sizeof(struct addrinfo)); + hints.ai_family = AF_UNSPEC; /* Allow IPv4 or IPv6 */ + hints.ai_socktype = SOCK_DGRAM; /* Datagram socket */ + hints.ai_flags = AI_PASSIVE; /* For wildcard IP address */ + hints.ai_protocol = 0; /* Any protocol */ + hints.ai_canonname = NULL; + hints.ai_addr = NULL; + hints.ai_next = NULL; + + int r = getaddrinfo(ip, port, &hints, &result); + if (r != 0) { + error("getaddrinfo('%s', '%s'): %s\n", ip, port, gai_strerror(r)); + return -1; + } + + for (rp = result; rp != NULL; rp = rp->ai_next) { + int fd = -1; + + char rip[INET_ADDRSTRLEN + INET6_ADDRSTRLEN] = "INVALID"; + int rport = default_port; + + switch (rp->ai_addr->sa_family) { + case AF_INET: { + struct sockaddr_in *sin = (struct sockaddr_in *) rp->ai_addr; + inet_ntop(AF_INET, &sin->sin_addr, rip, INET_ADDRSTRLEN); + rport = ntohs(sin->sin_port); + fd = create_listen_socket4(rip, rport, listen_backlog); + break; + } + + case AF_INET6: { + struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) rp->ai_addr; + inet_ntop(AF_INET6, &sin6->sin6_addr, rip, INET6_ADDRSTRLEN); + rport = ntohs(sin6->sin6_port); + fd = create_listen_socket6(rip, rport, listen_backlog); + break; + } + } + + if (fd == -1) + error("Cannot bind to ip '%s', port %d", rip, default_port); + else { + add_listen_socket(fd, rip, rport); + added++; + } + } + + freeaddrinfo(result); + + return added; } +int create_listen_sockets(void) { + listen_backlog = (int) config_get_number("global", "http port listen backlog", LISTEN_BACKLOG); + + if(config_exists("global", "bind socket to IP") && !config_exists("global", "bind to")) + config_rename("global", "bind socket to IP", "bind to"); + + if(config_exists("global", "port") && !config_exists("global", "default port")) + config_rename("global", "port", "default port"); + + listen_port = (int) config_get_number("global", "default port", LISTEN_PORT); + if(listen_port < 1 || listen_port > 65535) { + error("Invalid listen port %d given. Defaulting to %d.", listen_port, LISTEN_PORT); + listen_port = (int) config_set_number("global", "default port", LISTEN_PORT); + } + debug(D_OPTIONS, "Default listen port set to %d.", listen_port); + + char *s = config_get("global", "bind to", "*"); + while(*s) { + char *e = s; + + // skip separators, moving both s(tart) and e(nd) + while(isspace(*e) || *e == ',') s = ++e; + + // move e(nd) to the first separator + while(*e && !isspace(*e) && *e != ',') e++; + + // is there anything? + if(!*s || s == e) break; + + char buf[e - s + 1]; + strncpyz(buf, s, e - s); + bind_to_one(buf, listen_port, listen_backlog); + + s = e; + } + + if(!listen_fds_count) + fatal("Cannot listen on any socket. Exiting..."); + + return (int)listen_fds_count; +} // -------------------------------------------------------------------------------------- // the main socket listener +static inline void cleanup_web_clients(void) { + struct web_client *w; + + for (w = web_clients; w;) { + if (w->obsolete) { + debug(D_WEB_CLIENT, "%llu: Removing client.", w->id); + // pthread_cancel(w->thread); + // pthread_join(w->thread, NULL); + w = web_client_free(w); +#ifdef NETDATA_INTERNAL_CHECKS + log_allocations(); +#endif + } + else w = w->next; + } +} + // 1. it accepts new incoming requests on our port // 2. creates a new web_client for each connection received // 3. spawns a new pthread to serve the client (this is optimal for keep-alive clients) // 4. cleans up old web_clients that their pthreads have been exited -void *socket_listen_main(void *ptr) -{ - if(ptr) { ; } - - info("WEB SERVER thread created with task id %d", gettid()); - - struct web_client *w; - struct timeval tv; - int retval; - - if(ptr) { ; } - - if(pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0) - error("Cannot set pthread cancel type to DEFERRED."); - - if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0) - error("Cannot set pthread cancel state to ENABLE."); - - web_client_timeout = (int) config_get_number("global", "disconnect idle web clients after seconds", DEFAULT_DISCONNECT_IDLE_WEB_CLIENTS_AFTER_SECONDS); - web_enable_gzip = config_get_boolean("global", "enable web responses gzip compression", web_enable_gzip); - - if(listen_fd < 0) fatal("LISTENER: Listen socket is not ready."); - - fd_set ifds, ofds, efds; - int fdmax = listen_fd; - - FD_ZERO (&ifds); - FD_ZERO (&ofds); - FD_ZERO (&efds); - - for(;;) { - tv.tv_sec = 0; - tv.tv_usec = 200000; - - if(listen_fd >= 0) { - FD_SET(listen_fd, &ifds); - FD_SET(listen_fd, &efds); - } - - // debug(D_WEB_CLIENT, "LISTENER: Waiting..."); - retval = select(fdmax+1, &ifds, &ofds, &efds, &tv); - - if(retval == -1) { - error("LISTENER: select() failed."); - continue; - } - else if(retval) { - // check for new incoming connections - if(FD_ISSET(listen_fd, &ifds)) { - w = web_client_create(listen_fd); - if(unlikely(!w)) { - // no need for error log - web_client_create already logged the error - continue; - } - - if(pthread_create(&w->thread, NULL, web_client_main, w) != 0) { - error("%llu: failed to create new thread for web client."); - w->obsolete = 1; - } - else if(pthread_detach(w->thread) != 0) { - error("%llu: Cannot request detach of newly created web client thread.", w->id); - w->obsolete = 1; - } - } - else debug(D_WEB_CLIENT, "LISTENER: select() didn't do anything."); - - } - //else { - // debug(D_WEB_CLIENT, "LISTENER: select() timeout."); - //} - - // cleanup unused clients - for(w = web_clients; w ; w = w?w->next:NULL) { - if(w->obsolete) { - debug(D_WEB_CLIENT, "%llu: Removing client.", w->id); - // pthread_join(w->thread, NULL); - w = web_client_free(w); -#ifdef NETDATA_INTERNAL_CHECKS - log_allocations(); -#endif - } - } - } +#define CLEANUP_EVERY_EVENTS 100 + +void *socket_listen_main_multi_threaded(void *ptr) { + (void)ptr; + + web_server_mode = WEB_SERVER_MODE_MULTI_THREADED; + info("Multi-threaded WEB SERVER thread created with task id %d", gettid()); + + struct web_client *w; + int retval, counter = 0; + + if(pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0) + error("Cannot set pthread cancel type to DEFERRED."); + + if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0) + error("Cannot set pthread cancel state to ENABLE."); + + if(!listen_fds_count) + fatal("LISTENER: No sockets to listen to."); + + struct pollfd *fds = callocz(sizeof(struct pollfd), listen_fds_count); + + size_t i; + for(i = 0; i < listen_fds_count ;i++) { + fds[i].fd = listen_fds[i]; + fds[i].events = POLLIN; + fds[i].revents = 0; + + info("Listening on '%s'", (listen_fds_names[i])?listen_fds_names[i]:"UNKNOWN"); + } + + int timeout = 10 * 1000; + + for(;;) { + // debug(D_WEB_CLIENT, "LISTENER: Waiting..."); + retval = poll(fds, listen_fds_count, timeout); + + if(unlikely(retval == -1)) { + error("LISTENER: poll() failed."); + continue; + } + else if(unlikely(!retval)) { + debug(D_WEB_CLIENT, "LISTENER: select() timeout."); + counter = 0; + cleanup_web_clients(); + continue; + } + + for(i = 0 ; i < listen_fds_count ; i++) { + short int revents = fds[i].revents; + + // check for new incoming connections + if(revents & POLLIN || revents & POLLPRI) { + fds[i].revents = 0; + + w = web_client_create(fds[i].fd); + if(unlikely(!w)) { + // no need for error log - web_client_create already logged the error + continue; + } + + if(pthread_create(&w->thread, NULL, web_client_main, w) != 0) { + error("%llu: failed to create new thread for web client.", w->id); + w->obsolete = 1; + } + else if(pthread_detach(w->thread) != 0) { + error("%llu: Cannot request detach of newly created web client thread.", w->id); + w->obsolete = 1; + } + } + } + + // cleanup unused clients + counter++; + if(counter >= CLEANUP_EVERY_EVENTS) { + counter = 0; + cleanup_web_clients(); + } + } + + debug(D_WEB_CLIENT, "LISTENER: exit!"); + close_listen_sockets(); + + return NULL; +} - error("LISTENER: exit!"); +struct web_client *single_threaded_clients[FD_SETSIZE]; - if(listen_fd >= 0) close(listen_fd); - exit(2); +static inline int single_threaded_link_client(struct web_client *w, fd_set *ifds, fd_set *ofds, fd_set *efds, int *max) { + if(unlikely(w->obsolete || w->dead || (!w->wait_receive && !w->wait_send))) + return 1; - return NULL; + if(unlikely(w->ifd < 0 || w->ifd >= FD_SETSIZE || w->ofd < 0 || w->ofd >= FD_SETSIZE)) { + error("%llu: invalid file descriptor, ifd = %d, ofd = %d (required 0 <= fd < FD_SETSIZE (%d)", w->id, w->ifd, w->ofd, FD_SETSIZE); + return 1; + } + + FD_SET(w->ifd, efds); + if(unlikely(*max < w->ifd)) *max = w->ifd; + + if(unlikely(w->ifd != w->ofd)) { + if(*max < w->ofd) *max = w->ofd; + FD_SET(w->ofd, efds); + } + + if(w->wait_receive) FD_SET(w->ifd, ifds); + if(w->wait_send) FD_SET(w->ofd, ofds); + + single_threaded_clients[w->ifd] = w; + single_threaded_clients[w->ofd] = w; + + return 0; } +static inline int single_threaded_unlink_client(struct web_client *w, fd_set *ifds, fd_set *ofds, fd_set *efds) { + FD_CLR(w->ifd, efds); + if(unlikely(w->ifd != w->ofd)) FD_CLR(w->ofd, efds); + + if(w->wait_receive) FD_CLR(w->ifd, ifds); + if(w->wait_send) FD_CLR(w->ofd, ofds); + + single_threaded_clients[w->ifd] = NULL; + single_threaded_clients[w->ofd] = NULL; + + if(unlikely(w->obsolete || w->dead || (!w->wait_receive && !w->wait_send))) + return 1; + + return 0; +} + +void *socket_listen_main_single_threaded(void *ptr) { + (void)ptr; + + web_server_mode = WEB_SERVER_MODE_SINGLE_THREADED; + + info("Single-threaded WEB SERVER thread created with task id %d", gettid()); + + struct web_client *w; + int retval; + + if(pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0) + error("Cannot set pthread cancel type to DEFERRED."); + + if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0) + error("Cannot set pthread cancel state to ENABLE."); + + if(!listen_fds_count) + fatal("LISTENER: no listen sockets available."); + + size_t i; + for(i = 0; i < FD_SETSIZE ; i++) + single_threaded_clients[i] = NULL; + + fd_set ifds, ofds, efds, rifds, rofds, refds; + FD_ZERO (&ifds); + FD_ZERO (&ofds); + FD_ZERO (&efds); + int fdmax = 0; + + for(i = 0; i < listen_fds_count ; i++) { + if (listen_fds[i] < 0 || listen_fds[i] >= FD_SETSIZE) + fatal("LISTENER: Listen socket %d is not ready, or invalid.", listen_fds[i]); + + info("Listening on '%s'", (listen_fds_names[i])?listen_fds_names[i]:"UNKNOWN"); + + FD_SET(listen_fds[i], &ifds); + FD_SET(listen_fds[i], &efds); + if(fdmax < listen_fds[i]) + fdmax = listen_fds[i]; + } + + for(;;) { + debug(D_WEB_CLIENT_ACCESS, "LISTENER: single threaded web server waiting (fdmax = %d)...", fdmax); + + struct timeval tv = { .tv_sec = 1, .tv_usec = 0 }; + rifds = ifds; + rofds = ofds; + refds = efds; + retval = select(fdmax+1, &rifds, &rofds, &refds, &tv); + + if(unlikely(retval == -1)) { + error("LISTENER: select() failed."); + continue; + } + else if(likely(retval)) { + debug(D_WEB_CLIENT_ACCESS, "LISTENER: got something."); + + for(i = 0; i < listen_fds_count ; i++) { + if (FD_ISSET(listen_fds[i], &rifds)) { + debug(D_WEB_CLIENT_ACCESS, "LISTENER: new connection."); + w = web_client_create(listen_fds[i]); + if (single_threaded_link_client(w, &ifds, &ofds, &ifds, &fdmax) != 0) { + web_client_free(w); + } + } + } + + for(i = 0 ; i <= (size_t)fdmax ; i++) { + if(likely(!FD_ISSET(i, &rifds) && !FD_ISSET(i, &rofds) && !FD_ISSET(i, &refds))) + continue; + + w = single_threaded_clients[i]; + if(unlikely(!w)) + continue; + + if(unlikely(single_threaded_unlink_client(w, &ifds, &ofds, &efds) != 0)) { + web_client_free(w); + continue; + } + + if (unlikely(FD_ISSET(w->ifd, &refds) || FD_ISSET(w->ofd, &refds))) { + web_client_free(w); + continue; + } + + if (unlikely(w->wait_receive && FD_ISSET(w->ifd, &rifds))) { + if (unlikely(web_client_receive(w) < 0)) { + web_client_free(w); + continue; + } + + if (w->mode != WEB_CLIENT_MODE_FILECOPY) { + debug(D_WEB_CLIENT, "%llu: Processing received data.", w->id); + web_client_process(w); + } + } + + if (unlikely(w->wait_send && FD_ISSET(w->ofd, &rofds))) { + if (unlikely(web_client_send(w) < 0)) { + debug(D_WEB_CLIENT, "%llu: Cannot send data to client. Closing client.", w->id); + web_client_free(w); + continue; + } + } + + if(unlikely(single_threaded_link_client(w, &ifds, &ofds, &efds, &fdmax) != 0)) { + web_client_free(w); + } + } + } + else { + debug(D_WEB_CLIENT_ACCESS, "LISTENER: single threaded web server timeout."); +#ifdef NETDATA_INTERNAL_CHECKS + log_allocations(); +#endif + } + } + + debug(D_WEB_CLIENT, "LISTENER: exit!"); + close_listen_sockets(); + return NULL; +} |