2 Copyright (C) 2000-2004 Kern Sibbald and John Walker
4 This program is free software; you can redistribute it and/or
5 modify it under the terms of the GNU General Public License as
6 published by the Free Software Foundation; either version 2 of
7 the License, or (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 General Public License for more details.
14 You should have received a copy of the GNU General Public
15 License along with this program; if not, write to the Free
16 Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
21 * Originally written by Kern Sibbald for inclusion in apcupsd,
22 * but heavily modified for Bacula
28 #include <netinet/in.h>
29 #include <sys/socket.h>
31 #include <arpa/inet.h>
33 #ifdef HAVE_ARPA_NAMESER_H
34 #include <arpa/nameser.h>
41 static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
45 int allow_severity = LOG_NOTICE;
46 int deny_severity = LOG_WARNING;
49 static bool quit = false;
51 void bnet_stop_thread_server(pthread_t tid)
54 if (!pthread_equal(tid, pthread_self())) {
55 pthread_kill(tid, TIMEOUT_SIGNAL);
60 Become Threaded Network Server
61 This function is able to handle multiple server ips in
62 ipv4 and ipv6 style. The Addresse are give in a comma
63 seperated string in bind_addr
64 In the moment it is inpossible to bind different ports.
67 bnet_thread_server(dlist *addrs, int max_clients, workq_t *client_wq,
68 void *handle_client_request(void *bsock))
72 struct sockaddr cli_addr; /* client's address */
76 struct request_info request;
80 dlink link; /* this MUST be the first item */
87 char allbuf[256 * 10];
88 Dmsg1(100, "Addresses %s\n", build_addresses_str(addrs, allbuf, sizeof(allbuf)));
90 foreach_dlist(p, addrs) {
91 /* Allocate on stack frame -- no need to free */
92 fd_ptr = (s_sockfd *)alloca(sizeof(s_sockfd));
93 fd_ptr->port = p->get_port_net_order();
97 for (tlog= 60; (fd_ptr->fd=socket(p->get_family(), SOCK_STREAM, 0)) < 0; tlog -= 10) {
101 Emsg3(M_ABORT, 0, _("Cannot open stream socket. ERR=%s. Current %s All %s\n"),
103 p->build_address_str(curbuf, sizeof(curbuf)),
104 build_addresses_str(addrs, allbuf, sizeof(allbuf)));
111 if (setsockopt(fd_ptr->fd, SOL_SOCKET, SO_REUSEADDR, (sockopt_val_t)&turnon,
112 sizeof(turnon)) < 0) {
114 Emsg1(M_WARNING, 0, _("Cannot set SO_REUSEADDR on socket: %s\n"),
118 int tmax = 30 * (60 / 5); /* wait 30 minutes max */
119 /* FIXME i can go to a endless loop i get a invalid address */
120 for (tlog = 0; bind(fd_ptr->fd, p->get_sockaddr(), p->get_sockaddr_len()) < 0; tlog -= 5) {
123 tlog = 2 * 60; /* Complain every 2 minutes */
124 Emsg2(M_WARNING, 0, _("Cannot bind port %d: ERR=%s: Retrying ...\n"),
125 ntohs(fd_ptr->port), be.strerror());
129 Emsg2(M_ABORT, 0, _("Cannot bind port %d: ERR=%s.\n"), ntohs(fd_ptr->port),
133 listen(fd_ptr->fd, 5); /* tell system we are ready */
134 sockfds.append(fd_ptr);
136 /* Start work queue thread */
137 if ((stat = workq_init(client_wq, max_clients, handle_client_request)) != 0) {
140 Emsg1(M_ABORT, 0, _("Could not init client queue: ERR=%s\n"), be.strerror());
143 * Wait for a connection from the client process.
146 unsigned int maxfd = 0;
149 foreach_dlist(fd_ptr, &sockfds) {
150 FD_SET((unsigned)fd_ptr->fd, &sockset);
151 maxfd = maxfd > (unsigned)fd_ptr->fd ? maxfd : fd_ptr->fd;
154 if ((stat = select(maxfd + 1, &sockset, NULL, NULL, NULL)) < 0) {
155 berrno be; /* capture errno */
156 if (errno == EINTR || errno == EAGAIN) {
160 foreach_dlist(fd_ptr, &sockfds) {
162 free((void *)fd_ptr);
164 Emsg1(M_FATAL, 0, _("Error in select: %s\n"), be.strerror());
168 foreach_dlist(fd_ptr, &sockfds) {
169 if (FD_ISSET(fd_ptr->fd, &sockset)) {
170 /* Got a connection, now accept it. */
172 clilen = sizeof(cli_addr);
173 newsockfd = accept(fd_ptr->fd, &cli_addr, &clilen);
174 } while (newsockfd < 0 && (errno == EINTR || errno == EAGAIN));
179 P(mutex); /* hosts_access is not thread safe */
180 request_init(&request, RQ_DAEMON, my_name, RQ_FILE, newsockfd, 0);
182 if (!hosts_access(&request)) {
184 Jmsg2(NULL, M_SECURITY, 0,
185 _("Connection from %s:%d refused by hosts.access\n"),
186 sockaddr_to_ascii(&cli_addr, buf, sizeof(buf)),
187 sockaddr_get_port(&cli_addr));
195 * Receive notification when connection dies.
197 if (setsockopt(newsockfd, SOL_SOCKET, SO_KEEPALIVE, (sockopt_val_t)&turnon,
198 sizeof(turnon)) < 0) {
200 Emsg1(M_WARNING, 0, _("Cannot set SO_KEEPALIVE on socket: %s\n"),
204 /* see who client is. i.e. who connected to us. */
206 sockaddr_to_ascii(&cli_addr, buf, sizeof(buf));
209 bs = init_bsock(NULL, newsockfd, "client", buf, fd_ptr->port, &cli_addr);
211 Jmsg0(NULL, M_ABORT, 0, _("Could not create client BSOCK.\n"));
214 /* Queue client to be served */
215 if ((stat = workq_add(client_wq, (void *)bs, NULL, 0)) != 0) {
218 Jmsg1(NULL, M_ABORT, 0, _("Could not add job to client queue: ERR=%s\n"),
225 /* Stop work queue thread */
226 if ((stat = workq_destroy(client_wq)) != 0) {
229 Emsg1(M_FATAL, 0, _("Could not destroy client queue: ERR=%s\n"),
237 * Bind an address so that we may accept connections
240 BSOCK *bnet_bind(int port)
243 struct sockaddr_in serv_addr; /* our address */
250 for (tlog = 0; (sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0; tlog -= 10) {
251 if (errno == EINTR || errno == EAGAIN) {
256 Emsg1(M_ERROR, 0, _("Cannot open stream socket: %s\n"), strerror(errno));
264 if (setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, (sockopt_val_t)&turnon, sizeof(turnon)) < 0) {
265 Emsg1(M_WARNING, 0, _("Cannot set SO_REUSEADDR on socket: %s\n"),
270 * Bind our local address so that the client can send to us.
272 bzero((char *)&serv_addr, sizeof(serv_addr));
273 serv_addr.sin_family = AF_INET;
274 serv_addr.sin_addr.s_addr = htonl(INADDR_ANY);
275 serv_addr.sin_port = htons(port);
277 for (tlog = 0; bind(sockfd, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) < 0;
280 if (errno == EINTR || errno == EAGAIN) {
285 Emsg2(M_WARNING, 0, _("Cannot bind port %d: ERR=%s: retrying ...\n"), port,
290 listen(sockfd, 1); /* tell system we are ready */
291 return init_bsock(NULL, sockfd, _("Server socket"), _("client"), port,
296 * Accept a single connection
298 BSOCK *bnet_accept(BSOCK * bsock, char *who)
300 fd_set ready, sockset;
301 int newsockfd, stat, len;
303 struct sockaddr_in cli_addr; /* client's address */
308 struct request_info request;
312 * Wait for a connection from the client process.
315 FD_SET((unsigned)bsock->fd, &sockset);
319 * Wait for a connection from a client process.
322 if ((stat = select(bsock->fd + 1, &ready, NULL, NULL, NULL)) < 0) {
323 if (errno == EINTR || errno = EAGAIN) {
327 Emsg1(M_FATAL, 0, _("Error in select: %s\n"), strerror(errno));
332 clilen = sizeof(cli_addr);
333 newsockfd = accept(bsock->fd, (struct sockaddr *)&cli_addr, &clilen);
334 } while (newsockfd < 0 && (errno == EINTR || errno = EAGAIN));
335 if (newsockfd >= 0) {
342 request_init(&request, RQ_DAEMON, my_name, RQ_FILE, newsockfd, 0);
344 if (!hosts_access(&request)) {
346 Emsg2(M_SECURITY, 0, _("Connection from %s:%d refused by hosts.access\n"),
347 inet_ntoa(cli_addr.sin_addr), ntohs(cli_addr.sin_port));
355 * Receive notification when connection dies.
357 if (setsockopt(newsockfd, SOL_SOCKET, SO_KEEPALIVE, (sockopt_val_t)&turnon, sizeof(turnon)) < 0) {
358 Emsg1(M_WARNING, 0, _("Cannot set SO_KEEPALIVE on socket: %s\n"),
362 /* see who client is. I.e. who connected to us.
363 * return it in the input message buffer.
365 if ((caller = inet_ntoa(cli_addr.sin_addr)) != NULL) {
366 pm_strcpy(&bsock->msg, caller);
370 bsock->msglen = strlen(bsock->msg);
373 Emsg2(M_FATAL, 0, _("Socket accept error for %s. ERR=%s\n"), who,
377 if (caller == NULL) {
378 caller = _("unknown");
380 len = strlen(caller) + strlen(who) + 3;
381 buf = (char *)malloc(len);
382 bstrncpy(buf, len, who);
383 bstrncat(buf, len, ": ");
384 bstrncat(buf, len, caller);
385 bs = init_bsock(NULL, newsockfd, _("client"), buf, bsock->port, &cli_addr);
387 return bs; /* return new BSOCK */