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>
35 int allow_severity = LOG_NOTICE;
36 int deny_severity = LOG_WARNING;
37 static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
40 /* Become Threaded Network Server */
42 bnet_thread_server(char *bind_addr, int port, int max_clients, workq_t *client_wq,
43 void handle_client_request(void *bsock))
45 int newsockfd, sockfd, stat;
47 struct sockaddr_in cli_addr; /* client's address */
48 struct sockaddr_in serv_addr; /* our address */
49 struct in_addr bind_ip; /* address to bind to */
51 fd_set ready, sockset;
55 struct request_info request;
61 for (tlog=0; (sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0; tlog -= 10 ) {
64 Emsg1(M_ERROR, 0, _("Cannot open stream socket: %s. Retrying ...\n"), strerror(errno));
72 if (setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &turnon, sizeof(turnon)) < 0) {
73 Emsg1(M_WARNING, 0, _("Cannot set SO_REUSEADDR on socket: %s\n"), strerror(errno));
77 * Bind our local address so that the client can send to us.
79 bind_ip.s_addr = htonl(INADDR_ANY);
80 if (bind_addr && bind_addr[0]) {
82 if (inet_pton(AF_INET, bind_addr, &bind_ip) <= 0) {
84 if (inet_aton(bind_addr, &bind_ip) <= 0) {
86 Emsg1(M_WARNING, 0, _("Invalid bind address: %s, using INADDR_ANY\n"),
88 bind_ip.s_addr = htonl(INADDR_ANY);
91 memset((char *) &serv_addr, 0, sizeof(serv_addr));
92 serv_addr.sin_family = AF_INET;
93 serv_addr.sin_addr.s_addr = bind_ip.s_addr;
94 serv_addr.sin_port = htons(port);
96 int tmax = 30 * (60 / 5); /* wait 30 minutes max */
97 for (tlog=0; bind(sockfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0; tlog -= 5 ) {
99 tlog = 2*60; /* Complain every 2 minutes */
100 Emsg2(M_WARNING, 0, _("Cannot bind port %d: %s. Retrying ...\n"), port, strerror(errno));
104 Emsg2(M_ABORT, 0, _("Cannot bind port %d: %s.\n"), port, strerror(errno));
107 listen(sockfd, 5); /* tell system we are ready */
110 FD_SET(sockfd, &sockset);
112 /* Start work queue thread */
113 if ((stat = workq_init(client_wq, max_clients, handle_client_request)) != 0) {
114 Emsg1(M_ABORT, 0, _("Could not init client queue: ERR=%s\n"), strerror(stat));
119 * Wait for a connection from a client process.
122 if ((stat = select(sockfd+1, &ready, NULL, NULL, NULL)) < 0) {
123 if (errno == EINTR || errno == EAGAIN) {
128 Emsg1(M_FATAL, 0, _("Error in select: %s\n"), strerror(errno));
131 clilen = sizeof(cli_addr);
132 newsockfd = accept(sockfd, (struct sockaddr *)&cli_addr, &clilen);
135 P(mutex); /* hosts_access is not thread safe */
136 request_init(&request, RQ_DAEMON, my_name, RQ_FILE, newsockfd, 0);
138 if (!hosts_access(&request)) {
140 Jmsg2(NULL, M_WARNING, 0, _("Connection from %s:%d refused by hosts.access"),
141 inet_ntoa(cli_addr.sin_addr), ntohs(cli_addr.sin_port));
149 * Receive notification when connection dies.
151 if (setsockopt(newsockfd, SOL_SOCKET, SO_KEEPALIVE, &turnon, sizeof(turnon)) < 0) {
152 Emsg1(M_WARNING, 0, _("Cannot set SO_KEEPALIVE on socket: %s\n") , strerror(errno));
155 /* see who client is. i.e. who connected to us. */
156 caller = inet_ntoa(cli_addr.sin_addr);
157 if (caller == NULL) {
158 caller = "unknown client";
161 /* Queue client to be served */
162 if ((stat = workq_add(client_wq,
163 (void *)init_bsock(NULL, newsockfd, "client", caller, port))) != 0) {
164 Jmsg1(NULL, M_ABORT, 0, _("Could not add job to client queue: ERR=%s\n"), strerror(stat));
172 * Bind an address so that we may accept connections
179 struct sockaddr_in serv_addr; /* our address */
186 for (tlog=0; (sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0; tlog -= 10 ) {
189 Emsg1(M_ERROR, 0, _("Cannot open stream socket: %s\n"), strerror(errno));
197 if (setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &turnon, sizeof(turnon)) < 0) {
198 Emsg1(M_WARNING, 0, _("Cannot set SO_REUSEADDR on socket: %s\n") , strerror(errno));
202 * Bind our local address so that the client can send to us.
204 bzero((char *) &serv_addr, sizeof(serv_addr));
205 serv_addr.sin_family = AF_INET;
206 serv_addr.sin_addr.s_addr = htonl(INADDR_ANY);
207 serv_addr.sin_port = htons(port);
209 for (tlog=0; bind(sockfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0; tlog -= 5 ) {
212 Emsg2(M_WARNING, 0, _("Cannot bind port %d: %s: retrying ...\n"), port, strerror(errno));
216 listen(sockfd, 1); /* tell system we are ready */
217 return init_bsock(NULL, sockfd, _("Server socket"), _("client"), port);
221 * Accept a single connection
224 bnet_accept(BSOCK *bsock, char *who)
226 fd_set ready, sockset;
227 int newsockfd, stat, len;
229 struct sockaddr_in cli_addr; /* client's address */
234 struct request_info request;
238 * Wait for a connection from the client process.
241 FD_SET(bsock->fd, &sockset);
245 * Wait for a connection from a client process.
248 if ((stat = select(bsock->fd+1, &ready, NULL, NULL, NULL)) < 0) {
249 if (errno == EINTR || errno == EAGAIN) {
253 Emsg1(M_FATAL, 0, _("Error in select: %s\n"), strerror(errno));
257 clilen = sizeof(cli_addr);
258 newsockfd = accept(bsock->fd, (struct sockaddr *)&cli_addr, &clilen);
264 request_init(&request, RQ_DAEMON, my_name, RQ_FILE, newsockfd, 0);
266 if (!hosts_access(&request)) {
268 Emsg2(M_WARNING, 0, _("Connection from %s:%d refused by hosts.access"),
269 inet_ntoa(cli_addr.sin_addr), ntohs(cli_addr.sin_port));
277 * Receive notification when connection dies.
279 if (setsockopt(newsockfd, SOL_SOCKET, SO_KEEPALIVE, &turnon, sizeof(turnon)) < 0) {
280 Emsg1(M_WARNING, 0, _("Cannot set SO_KEEPALIVE on socket: %s\n"), strerror(errno));
283 /* see who client is. I.e. who connected to us.
284 * return it in the input message buffer.
286 if ((caller = inet_ntoa(cli_addr.sin_addr)) != NULL) {
287 strcpy(bsock->msg, caller);
291 bsock->msglen = strlen(bsock->msg);
294 Emsg2(M_FATAL, 0, _("Socket accept error for %s. ERR=%s\n"), who,
298 if (caller == NULL) {
301 len = strlen(caller) + strlen(who) + 3;
302 buf = (char *) malloc(len);
306 bs = init_bsock(NULL, newsockfd, "client", buf, bsock->port);
308 return bs; /* return new BSOCK */