+++ /dev/null
-//
-// TCP sockets layer
-//
-// Copyright (c) 1987-2021 by the citadel.org team
-//
-// This program is open source software. It runs great on the
-// Linux operating system (and probably elsewhere). You can use,
-// copy, and run it under the terms of the GNU General Public
-// License version 3.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-#include "webcit.h"
-
-// lingering_close() a`la Apache. see
-// http://httpd.apache.org/docs/2.0/misc/fin_wait_2.html for rationale
-int lingering_close(int fd) {
- char buf[SIZ];
- int i;
- fd_set set;
- struct timeval tv, start;
-
- gettimeofday(&start, NULL);
- if (fd == -1)
- return -1;
- shutdown(fd, 1);
- do {
- do {
- gettimeofday(&tv, NULL);
- tv.tv_sec = SLEEPING - (tv.tv_sec - start.tv_sec);
- tv.tv_usec = start.tv_usec - tv.tv_usec;
- if (tv.tv_usec < 0) {
- tv.tv_sec--;
- tv.tv_usec += 1000000;
- }
- FD_ZERO(&set);
- FD_SET(fd, &set);
- i = select(fd + 1, &set, NULL, NULL, &tv);
- } while (i == -1 && errno == EINTR);
-
- if (i <= 0)
- break;
-
- i = read(fd, buf, sizeof buf);
- } while (i != 0 && (i != -1 || errno == EINTR));
-
- return close(fd);
-}
-
-
-// This is a generic function to set up a master socket for listening on
-// a TCP port. The server shuts down if the bind fails. (IPv4/IPv6 version)
-//
-// ip_addr IP address to bind
-// port_number port number to bind
-// queue_len number of incoming connections to allow in the queue
-int webcit_tcp_server(const char *ip_addr, int port_number, int queue_len) {
- const char *ipv4broadcast = "0.0.0.0";
- int IsDefault = 0;
- struct protoent *p;
- struct sockaddr_in6 sin6;
- struct sockaddr_in sin4;
- int s, i, b;
- int ip_version = 6;
-
-retry:
- memset(&sin6, 0, sizeof(sin6));
- memset(&sin4, 0, sizeof(sin4));
- sin6.sin6_family = AF_INET6;
- sin4.sin_family = AF_INET;
-
- if ( (ip_addr == NULL) // any IPv6
- || (IsEmptyStr(ip_addr))
- || (!strcmp(ip_addr, "*"))
- ) {
- IsDefault = 1;
- ip_version = 6;
- sin6.sin6_addr = in6addr_any;
- }
- else if (!strcmp(ip_addr, "0.0.0.0")) { // any IPv4
- ip_version = 4;
- sin4.sin_addr.s_addr = INADDR_ANY;
- }
- else if ((strchr(ip_addr, '.')) && (!strchr(ip_addr, ':'))) { // specific IPv4
- ip_version = 4;
- if (inet_pton(AF_INET, ip_addr, &sin4.sin_addr) <= 0) {
- syslog(LOG_WARNING, "Error binding to [%s] : %s\n", ip_addr, strerror(errno));
- return (-1);
- }
- }
- else { // specific IPv6
-
- ip_version = 6;
- if (inet_pton(AF_INET6, ip_addr, &sin6.sin6_addr) <= 0) {
- syslog(LOG_WARNING, "Error binding to [%s] : %s\n", ip_addr, strerror(errno));
- return (-1);
- }
- }
-
- if (port_number == 0) {
- syslog(LOG_WARNING, "Cannot start: no port number specified.\n");
- return (-1);
- }
- sin6.sin6_port = htons((u_short) port_number);
- sin4.sin_port = htons((u_short) port_number);
-
- p = getprotobyname("tcp");
-
- s = socket(((ip_version == 6) ? PF_INET6 : PF_INET), SOCK_STREAM, (p->p_proto));
- if (s < 0) {
- if (IsDefault && (errno == EAFNOSUPPORT)) {
- s = 0;
- ip_addr = ipv4broadcast;
- goto retry;
- }
- syslog(LOG_WARNING, "Can't create a listening socket: %s\n", strerror(errno));
- return (-1);
- }
-
- // Set some socket options that make sense.
- i = 1;
- setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &i, sizeof(i));
-
- if (ip_version == 6) {
- b = bind(s, (struct sockaddr *) &sin6, sizeof(sin6));
- }
- else {
- b = bind(s, (struct sockaddr *) &sin4, sizeof(sin4));
- }
-
- if (b < 0) {
- syslog(LOG_ERR, "Can't bind: %s\n", strerror(errno));
- close(s);
- return (-1);
- }
-
- if (listen(s, queue_len) < 0) {
- syslog(LOG_ERR, "Can't listen: %s\n", strerror(errno));
- close(s);
- return (-1);
- }
- return (s);
-}
-
-
-// Create a Unix domain socket and listen on it
-// sockpath - file name of the unix domain socket
-// queue_len - Number of incoming connections to allow in the queue
-int webcit_uds_server(char *sockpath, int queue_len) {
- struct sockaddr_un addr;
- int s;
- int i;
- int actual_queue_len;
-
- actual_queue_len = queue_len;
- if (actual_queue_len < 5)
- actual_queue_len = 5;
-
- i = unlink(sockpath);
- if ((i != 0) && (errno != ENOENT)) {
- syslog(LOG_WARNING, "webcit: can't unlink %s: %s", sockpath, strerror(errno));
- return (-1);
- }
-
- memset(&addr, 0, sizeof(addr));
- addr.sun_family = AF_UNIX;
- safestrncpy(addr.sun_path, sockpath, sizeof addr.sun_path);
-
- s = socket(AF_UNIX, SOCK_STREAM, 0);
- if (s < 0) {
- syslog(LOG_WARNING, "webcit: Can't create a unix domain socket: %s", strerror(errno));
- return (-1);
- }
-
- if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
- syslog(LOG_WARNING, "webcit: Can't bind: %s", strerror(errno));
- close(s);
- return (-1);
- }
-
- if (listen(s, actual_queue_len) < 0) {
- syslog(LOG_WARNING, "webcit: Can't listen: %s", strerror(errno));
- close(s);
- return (-1);
- }
-
- chmod(sockpath, 0777);
- return (s);
-}
projects / citadel.git / blobdiff