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
28 #include <netinet/in.h>
29 #include <sys/socket.h>
30 #include <arpa/inet.h>
32 #ifdef HAVE_ARPA_NAMESER_H
33 #include <arpa/nameser.h>
39 static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
43 int allow_severity = LOG_NOTICE;
44 int deny_severity = LOG_WARNING;
47 /* Become Threaded Network Server */
49 bnet_thread_server(char *bind_addr, int port, int max_clients, workq_t *client_wq,
50 void *handle_client_request(void *bsock))
52 int newsockfd, sockfd, stat;
54 struct sockaddr_in cli_addr; /* client's address */
55 struct sockaddr_in serv_addr; /* our address */
56 struct in_addr bind_ip; /* address to bind to */
58 fd_set ready, sockset;
62 struct request_info request;
68 for (tlog=0; (sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0; tlog -= 10 ) {
71 Emsg1(M_ERROR, 0, _("Cannot open stream socket: %s. Retrying ...\n"), strerror(errno));
79 if (setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, (sockopt_val_t)&turnon, sizeof(turnon)) < 0) {
80 Emsg1(M_WARNING, 0, _("Cannot set SO_REUSEADDR on socket: %s\n"), strerror(errno));
84 * Bind our local address so that the client can send to us.
86 bind_ip.s_addr = htonl(INADDR_ANY);
87 if (bind_addr && bind_addr[0]) {
89 if (inet_pton(AF_INET, bind_addr, &bind_ip) <= 0) {
91 if (inet_aton(bind_addr, &bind_ip) <= 0) {
93 Emsg1(M_WARNING, 0, _("Invalid bind address: %s, using INADDR_ANY\n"),
95 bind_ip.s_addr = htonl(INADDR_ANY);
98 memset((char *) &serv_addr, 0, sizeof(serv_addr));
99 serv_addr.sin_family = AF_INET;
100 serv_addr.sin_addr.s_addr = bind_ip.s_addr;
101 serv_addr.sin_port = htons(port);
103 int tmax = 30 * (60 / 5); /* wait 30 minutes max */
104 for (tlog=0; bind(sockfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0; tlog -= 5 ) {
106 tlog = 2*60; /* Complain every 2 minutes */
107 Emsg2(M_WARNING, 0, _("Cannot bind port %d: %s. Retrying ...\n"), port, strerror(errno));
111 Emsg2(M_ABORT, 0, _("Cannot bind port %d: %s.\n"), port, strerror(errno));
114 listen(sockfd, 5); /* tell system we are ready */
117 FD_SET(sockfd, &sockset);
119 /* Start work queue thread */
120 if ((stat = workq_init(client_wq, max_clients, handle_client_request)) != 0) {
121 Emsg1(M_ABORT, 0, _("Could not init client queue: ERR=%s\n"), strerror(stat));
126 * Wait for a connection from a client process.
129 if ((stat = select(sockfd+1, &ready, NULL, NULL, NULL)) < 0) {
130 if (errno == EINTR || errno == EAGAIN) {
135 Emsg1(M_FATAL, 0, _("Error in select: %s\n"), strerror(errno));
138 clilen = sizeof(cli_addr);
139 newsockfd = accept(sockfd, (struct sockaddr *)&cli_addr, &clilen);
142 P(mutex); /* hosts_access is not thread safe */
143 request_init(&request, RQ_DAEMON, my_name, RQ_FILE, newsockfd, 0);
145 if (!hosts_access(&request)) {
147 Jmsg2(NULL, M_WARNING, 0, _("Connection from %s:%d refused by hosts.access"),
148 inet_ntoa(cli_addr.sin_addr), ntohs(cli_addr.sin_port));
156 * Receive notification when connection dies.
158 if (setsockopt(newsockfd, SOL_SOCKET, SO_KEEPALIVE, (sockopt_val_t)&turnon, sizeof(turnon)) < 0) {
159 Emsg1(M_WARNING, 0, _("Cannot set SO_KEEPALIVE on socket: %s\n") , strerror(errno));
162 /* see who client is. i.e. who connected to us. */
164 caller = inet_ntoa(cli_addr.sin_addr); /* NOT thread safe, use mutex */
165 if (caller == NULL) {
166 caller = "unknown client";
169 /* Queue client to be served */
170 if ((stat = workq_add(client_wq,
171 (void *)init_bsock(NULL, newsockfd, "client", caller, port), NULL, 0)) != 0) {
173 Jmsg1(NULL, M_ABORT, 0, _("Could not add job to client queue: ERR=%s\n"), strerror(stat));
182 * Bind an address so that we may accept connections
189 struct sockaddr_in serv_addr; /* our address */
196 for (tlog=0; (sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0; tlog -= 10 ) {
199 Emsg1(M_ERROR, 0, _("Cannot open stream socket: %s\n"), strerror(errno));
207 if (setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, (sockopt_val_t)&turnon, sizeof(turnon)) < 0) {
208 Emsg1(M_WARNING, 0, _("Cannot set SO_REUSEADDR on socket: %s\n") , strerror(errno));
212 * Bind our local address so that the client can send to us.
214 bzero((char *) &serv_addr, sizeof(serv_addr));
215 serv_addr.sin_family = AF_INET;
216 serv_addr.sin_addr.s_addr = htonl(INADDR_ANY);
217 serv_addr.sin_port = htons(port);
219 for (tlog=0; bind(sockfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0; tlog -= 5 ) {
222 Emsg2(M_WARNING, 0, _("Cannot bind port %d: %s: retrying ...\n"), port, strerror(errno));
226 listen(sockfd, 1); /* tell system we are ready */
227 return init_bsock(NULL, sockfd, _("Server socket"), _("client"), port);
231 * Accept a single connection
234 bnet_accept(BSOCK *bsock, char *who)
236 fd_set ready, sockset;
237 int newsockfd, stat, len;
239 struct sockaddr_in cli_addr; /* client's address */
244 struct request_info request;
248 * Wait for a connection from the client process.
251 FD_SET(bsock->fd, &sockset);
255 * Wait for a connection from a client process.
258 if ((stat = select(bsock->fd+1, &ready, NULL, NULL, NULL)) < 0) {
259 if (errno == EINTR || errno == EAGAIN) {
263 Emsg1(M_FATAL, 0, _("Error in select: %s\n"), strerror(errno));
267 clilen = sizeof(cli_addr);
268 newsockfd = accept(bsock->fd, (struct sockaddr *)&cli_addr, &clilen);
274 request_init(&request, RQ_DAEMON, my_name, RQ_FILE, newsockfd, 0);
276 if (!hosts_access(&request)) {
278 Emsg2(M_WARNING, 0, _("Connection from %s:%d refused by hosts.access"),
279 inet_ntoa(cli_addr.sin_addr), ntohs(cli_addr.sin_port));
287 * Receive notification when connection dies.
289 if (setsockopt(newsockfd, SOL_SOCKET, SO_KEEPALIVE, (sockopt_val_t)&turnon, sizeof(turnon)) < 0) {
290 Emsg1(M_WARNING, 0, _("Cannot set SO_KEEPALIVE on socket: %s\n"), strerror(errno));
293 /* see who client is. I.e. who connected to us.
294 * return it in the input message buffer.
296 if ((caller = inet_ntoa(cli_addr.sin_addr)) != NULL) {
297 pm_strcpy(&bsock->msg, caller);
301 bsock->msglen = strlen(bsock->msg);
304 Emsg2(M_FATAL, 0, _("Socket accept error for %s. ERR=%s\n"), who,
308 if (caller == NULL) {
311 len = strlen(caller) + strlen(who) + 3;
312 buf = (char *) malloc(len);
316 bs = init_bsock(NULL, newsockfd, "client", buf, bsock->port);
318 return bs; /* return new BSOCK */