4 * Copyright (c) 1987-2018 by the citadel.org team
6 * This program is open source software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 3.
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
12 * GNU General Public License for more details.
18 * lingering_close() a`la Apache. see
19 * http://httpd.apache.org/docs/2.0/misc/fin_wait_2.html for rationale
21 int lingering_close(int fd)
26 struct timeval tv, start;
28 gettimeofday(&start, NULL);
34 gettimeofday(&tv, NULL);
35 tv.tv_sec = SLEEPING - (tv.tv_sec - start.tv_sec);
36 tv.tv_usec = start.tv_usec - tv.tv_usec;
39 tv.tv_usec += 1000000;
43 i = select(fd + 1, &set, NULL, NULL, &tv);
44 } while (i == -1 && errno == EINTR);
49 i = read(fd, buf, sizeof buf);
50 } while (i != 0 && (i != -1 || errno == EINTR));
57 * This is a generic function to set up a master socket for listening on
58 * a TCP port. The server shuts down if the bind fails. (IPv4/IPv6 version)
60 * ip_addr IP address to bind
61 * port_number port number to bind
62 * queue_len number of incoming connections to allow in the queue
64 int webcit_tcp_server(const char *ip_addr, int port_number, int queue_len)
66 const char *ipv4broadcast = "0.0.0.0";
69 struct sockaddr_in6 sin6;
70 struct sockaddr_in sin4;
75 memset(&sin6, 0, sizeof(sin6));
76 memset(&sin4, 0, sizeof(sin4));
77 sin6.sin6_family = AF_INET6;
78 sin4.sin_family = AF_INET;
80 if ((ip_addr == NULL) /* any IPv6 */
81 ||(IsEmptyStr(ip_addr))
82 || (!strcmp(ip_addr, "*"))
86 sin6.sin6_addr = in6addr_any;
87 } else if (!strcmp(ip_addr, "0.0.0.0")) { /* any IPv4 */
89 sin4.sin_addr.s_addr = INADDR_ANY;
90 } else if ((strchr(ip_addr, '.')) && (!strchr(ip_addr, ':'))) { /* specific IPv4 */
92 if (inet_pton(AF_INET, ip_addr, &sin4.sin_addr) <= 0) {
93 syslog(LOG_WARNING, "Error binding to [%s] : %s\n", ip_addr, strerror(errno));
96 } else { /* specific IPv6 */
99 if (inet_pton(AF_INET6, ip_addr, &sin6.sin6_addr) <= 0) {
100 syslog(LOG_WARNING, "Error binding to [%s] : %s\n", ip_addr, strerror(errno));
105 if (port_number == 0) {
106 syslog(LOG_WARNING, "Cannot start: no port number specified.\n");
109 sin6.sin6_port = htons((u_short) port_number);
110 sin4.sin_port = htons((u_short) port_number);
112 p = getprotobyname("tcp");
114 s = socket(((ip_version == 6) ? PF_INET6 : PF_INET), SOCK_STREAM, (p->p_proto));
116 if (IsDefault && (errno == EAFNOSUPPORT)) {
118 ip_addr = ipv4broadcast;
121 syslog(LOG_WARNING, "Can't create a listening socket: %s\n", strerror(errno));
124 /* Set some socket options that make sense. */
126 setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &i, sizeof(i));
128 if (ip_version == 6) {
129 b = bind(s, (struct sockaddr *) &sin6, sizeof(sin6));
131 b = bind(s, (struct sockaddr *) &sin4, sizeof(sin4));
135 syslog(LOG_ERR, "Can't bind: %s\n", strerror(errno));
140 if (listen(s, queue_len) < 0) {
141 syslog(LOG_ERR, "Can't listen: %s\n", strerror(errno));
150 * Create a Unix domain socket and listen on it
151 * sockpath - file name of the unix domain socket
152 * queue_len - Number of incoming connections to allow in the queue
154 int webcit_uds_server(char *sockpath, int queue_len)
156 struct sockaddr_un addr;
159 int actual_queue_len;
161 actual_queue_len = queue_len;
162 if (actual_queue_len < 5)
163 actual_queue_len = 5;
165 i = unlink(sockpath);
166 if ((i != 0) && (errno != ENOENT)) {
167 syslog(LOG_WARNING, "webcit: can't unlink %s: %s", sockpath, strerror(errno));
171 memset(&addr, 0, sizeof(addr));
172 addr.sun_family = AF_UNIX;
173 safestrncpy(addr.sun_path, sockpath, sizeof addr.sun_path);
175 s = socket(AF_UNIX, SOCK_STREAM, 0);
177 syslog(LOG_WARNING, "webcit: Can't create a unix domain socket: %s", strerror(errno));
181 if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
182 syslog(LOG_WARNING, "webcit: Can't bind: %s", strerror(errno));
187 if (listen(s, actual_queue_len) < 0) {
188 syslog(LOG_WARNING, "webcit: Can't listen: %s", strerror(errno));
193 chmod(sockpath, 0777);