2 Copyright (C) 2000, 2001, 2002 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
29 #include <netinet/in.h>
30 #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 /* Become Threaded Network Server */
51 bnet_thread_server(char *bind_addr, int port, int max_clients, workq_t *client_wq,
52 void *handle_client_request(void *bsock))
54 int newsockfd, sockfd, stat;
56 struct sockaddr_in cli_addr; /* client's address */
57 struct sockaddr_in serv_addr; /* our address */
58 struct in_addr bind_ip; /* address to bind to */
63 struct request_info request;
69 for (tlog=0; (sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0; tlog -= 10 ) {
72 Emsg1(M_ERROR, 0, _("Cannot open stream socket: %s. Retrying ...\n"), strerror(errno));
80 if (setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, (sockopt_val_t)&turnon, sizeof(turnon)) < 0) {
81 Emsg1(M_WARNING, 0, _("Cannot set SO_REUSEADDR on socket: %s\n"), strerror(errno));
85 * Bind our local address so that the client can send to us.
87 bind_ip.s_addr = htonl(INADDR_ANY);
88 if (bind_addr && bind_addr[0]) {
90 if (inet_pton(AF_INET, bind_addr, &bind_ip) <= 0) {
92 if (inet_aton(bind_addr, &bind_ip) <= 0) {
94 Emsg1(M_WARNING, 0, _("Invalid bind address: %s, using INADDR_ANY\n"),
96 bind_ip.s_addr = htonl(INADDR_ANY);
99 memset((char *) &serv_addr, 0, sizeof(serv_addr));
100 serv_addr.sin_family = AF_INET;
101 serv_addr.sin_addr.s_addr = bind_ip.s_addr;
102 serv_addr.sin_port = htons(port);
104 int tmax = 30 * (60 / 5); /* wait 30 minutes max */
105 for (tlog=0; bind(sockfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0; tlog -= 5 ) {
107 tlog = 2*60; /* Complain every 2 minutes */
108 Emsg2(M_WARNING, 0, _("Cannot bind port %d: %s. Retrying ...\n"), port, strerror(errno));
112 Emsg2(M_ABORT, 0, _("Cannot bind port %d: %s.\n"), port, strerror(errno));
115 listen(sockfd, 5); /* tell system we are ready */
117 /* Start work queue thread */
118 if ((stat = workq_init(client_wq, max_clients, handle_client_request)) != 0) {
119 Emsg1(M_ABORT, 0, _("Could not init client queue: ERR=%s\n"), strerror(stat));
123 * Wait for a connection from the client process.
128 FD_SET(sockfd, &sockset);
130 if ((stat = select(sockfd+1, &sockset, NULL, NULL, NULL)) < 0) {
131 if (errno == EINTR || errno == EAGAIN) {
136 Emsg1(M_FATAL, 0, _("Error in select: %s\n"), strerror(errno));
140 /* Got a connection, now accept it. */
142 clilen = sizeof(cli_addr);
143 newsockfd = accept(sockfd, (struct sockaddr *)&cli_addr, &clilen);
144 } while (newsockfd < 0 && (errno == EINTR || errno == EAGAIN));
151 P(mutex); /* hosts_access is not thread safe */
152 request_init(&request, RQ_DAEMON, my_name, RQ_FILE, newsockfd, 0);
154 if (!hosts_access(&request)) {
156 Jmsg2(NULL, M_SECURITY, 0, _("Connection from %s:%d refused by hosts.access\n"),
157 inet_ntoa(cli_addr.sin_addr), ntohs(cli_addr.sin_port));
165 * Receive notification when connection dies.
167 if (setsockopt(newsockfd, SOL_SOCKET, SO_KEEPALIVE, (sockopt_val_t)&turnon, sizeof(turnon)) < 0) {
168 Emsg1(M_WARNING, 0, _("Cannot set SO_KEEPALIVE on socket: %s\n") , strerror(errno));
171 /* see who client is. i.e. who connected to us. */
173 caller = inet_ntoa(cli_addr.sin_addr); /* NOT thread safe, use mutex */
174 if (caller == NULL) {
175 caller = _("unknown client");
178 BSOCK *bs = init_bsock(NULL, newsockfd, "client", caller, port, &cli_addr);
180 Jmsg0(NULL, M_ABORT, 0, _("Could not create client BSOCK.\n"));
183 /* Queue client to be served */
184 if ((stat = workq_add(client_wq, (void *)bs, NULL, 0)) != 0) {
186 Jmsg1(NULL, M_ABORT, 0, _("Could not add job to client queue: ERR=%s\n"), strerror(stat));
191 /* Stop work queue thread */
192 if ((stat = workq_destroy(client_wq)) != 0) {
193 Emsg1(M_FATAL, 0, _("Could not destroy client queue: ERR=%s\n"), strerror(stat));
200 * Bind an address so that we may accept connections
207 struct sockaddr_in serv_addr; /* our address */
214 for (tlog=0; (sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0; tlog -= 10 ) {
215 if (errno == EINTR || errno == EAGAIN) {
220 Emsg1(M_ERROR, 0, _("Cannot open stream socket: %s\n"), strerror(errno));
228 if (setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, (sockopt_val_t)&turnon, sizeof(turnon)) < 0) {
229 Emsg1(M_WARNING, 0, _("Cannot set SO_REUSEADDR on socket: %s\n") , strerror(errno));
233 * Bind our local address so that the client can send to us.
235 bzero((char *) &serv_addr, sizeof(serv_addr));
236 serv_addr.sin_family = AF_INET;
237 serv_addr.sin_addr.s_addr = htonl(INADDR_ANY);
238 serv_addr.sin_port = htons(port);
240 for (tlog=0; bind(sockfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0; tlog -= 5 ) {
241 if (errno == EINTR || errno == EAGAIN) {
246 Emsg2(M_WARNING, 0, _("Cannot bind port %d: %s: retrying ...\n"), port, strerror(errno));
250 listen(sockfd, 1); /* tell system we are ready */
251 return init_bsock(NULL, sockfd, _("Server socket"), _("client"), port, &serv_addr);
255 * Accept a single connection
258 bnet_accept(BSOCK *bsock, char *who)
260 fd_set ready, sockset;
261 int newsockfd, stat, len;
263 struct sockaddr_in cli_addr; /* client's address */
268 struct request_info request;
272 * Wait for a connection from the client process.
275 FD_SET(bsock->fd, &sockset);
279 * Wait for a connection from a client process.
282 if ((stat = select(bsock->fd+1, &ready, NULL, NULL, NULL)) < 0) {
283 if (errno == EINTR || errno = EAGAIN) {
287 Emsg1(M_FATAL, 0, _("Error in select: %s\n"), strerror(errno));
292 clilen = sizeof(cli_addr);
293 newsockfd = accept(bsock->fd, (struct sockaddr *)&cli_addr, &clilen);
294 } while (newsockfd < 0 && (errno == EINTR || errno = EAGAIN));
295 if (newsockfd >= 0) {
302 request_init(&request, RQ_DAEMON, my_name, RQ_FILE, newsockfd, 0);
304 if (!hosts_access(&request)) {
306 Emsg2(M_SECURITY, 0, _("Connection from %s:%d refused by hosts.access\n"),
307 inet_ntoa(cli_addr.sin_addr), ntohs(cli_addr.sin_port));
315 * Receive notification when connection dies.
317 if (setsockopt(newsockfd, SOL_SOCKET, SO_KEEPALIVE, (sockopt_val_t)&turnon, sizeof(turnon)) < 0) {
318 Emsg1(M_WARNING, 0, _("Cannot set SO_KEEPALIVE on socket: %s\n"), strerror(errno));
321 /* see who client is. I.e. who connected to us.
322 * return it in the input message buffer.
324 if ((caller = inet_ntoa(cli_addr.sin_addr)) != NULL) {
325 pm_strcpy(&bsock->msg, caller);
329 bsock->msglen = strlen(bsock->msg);
332 Emsg2(M_FATAL, 0, _("Socket accept error for %s. ERR=%s\n"), who,
336 if (caller == NULL) {
339 len = strlen(caller) + strlen(who) + 3;
340 buf = (char *) malloc(len);
344 bs = init_bsock(NULL, newsockfd, "client", buf, bsock->port, &cli_addr);
346 return bs; /* return new BSOCK */