-/*
- create a data (udp) socket
- OBSOLETED: use only one listening socket for compatibility with non-Linux operating systems
-*/
-int setup_vpn_connection(connection_t *cl)
-{
- int nfd, flags;
- struct sockaddr_in a;
- const int one = 1;
-cp
- if(debug_lvl >= DEBUG_TRAFFIC)
- syslog(LOG_DEBUG, _("Opening UDP socket to %s"), cl->hostname);
-
- nfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
- if(nfd == -1)
- {
- syslog(LOG_ERR, _("Creating UDP socket failed: %m"));
- return -1;
- }
-
- if(setsockopt(nfd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)))
- {
- close(nfd);
- syslog(LOG_ERR, _("System call `%s' failed: %m"),
- "setsockopt");
- return -1;
- }
-
- flags = fcntl(nfd, F_GETFL);
- if(fcntl(nfd, F_SETFL, flags | O_NONBLOCK) < 0)
- {
- close(nfd);
- syslog(LOG_ERR, _("System call `%s' failed: %m"),
- "fcntl");
- return -1;
- }
-
- memset(&a, 0, sizeof(a));
- a.sin_family = AF_INET;
- a.sin_port = htons(myself->port);
- a.sin_addr.s_addr = htonl(INADDR_ANY);
-
- if(bind(nfd, (struct sockaddr *)&a, sizeof(struct sockaddr)))
- {
- close(nfd);
- syslog(LOG_ERR, _("Can't bind to port %hd/udp: %m"), myself->port);
- return -1;
- }
-
- a.sin_family = AF_INET;
- a.sin_port = htons(cl->port);
- a.sin_addr.s_addr = htonl(cl->address);
-
- if(connect(nfd, (struct sockaddr *)&a, sizeof(a)) == -1)
- {
- close(nfd);
- syslog(LOG_ERR, _("Connecting to %s port %d failed: %m"),
- cl->hostname, cl->port);
- return -1;
- }
-
- flags = fcntl(nfd, F_GETFL);
- if(fcntl(nfd, F_SETFL, flags | O_NONBLOCK) < 0)
- {
- close(nfd);
- syslog(LOG_ERR, _("This is a bug: %s:%d: %d:%m %s (%s)"), __FILE__, __LINE__, nfd,
- cl->name, cl->hostname);
- return -1;
- }
-
- cl->socket = nfd;
- cl->status.dataopen = 1;
-cp
- return 0;
+static void sigint_handler(int signal, short events, void *data) {
+ static int saved_debug_level = -1;
+
+ logger(LOG_NOTICE, _("Got %s signal"), strsignal(signal));
+
+ if(saved_debug_level != -1) {
+ logger(LOG_NOTICE, _("Reverting to old debug level (%d)"),
+ saved_debug_level);
+ debug_level = saved_debug_level;
+ saved_debug_level = -1;
+ } else {
+ logger(LOG_NOTICE,
+ _("Temporarily setting debug level to 5. Kill me with SIGINT again to go back to level %d."),
+ debug_level);
+ saved_debug_level = debug_level;
+ debug_level = 5;
+ }