Fix GGSN signal handling
In order te exit gracefully (closing the tun devices), we install a SIGINT
handler and note its occurrence in a global variable.
This fix is from http://sourceforge.net/tracker/index.php?func=detail&aid=1811513&group_id=68956&atid=522957
diff --git a/ggsn/ggsn.c b/ggsn/ggsn.c
index ca6a5cc..452df30 100644
--- a/ggsn/ggsn.c
+++ b/ggsn/ggsn.c
@@ -54,7 +54,7 @@
#include "../gtp/gtp.h"
#include "cmdline.h"
-
+int end = 0;
int maxfd = 0; /* For select() */
struct in_addr listen_;
@@ -70,6 +70,11 @@
struct tun_t *tun; /* TUN instance */
struct ippool_t *ippool; /* Pool of IP addresses */
+/* To exit gracefully. Used with GCC compilation flag -pg and gprof */
+void signal_handler(int s) {
+ if (debug) printf("Received signal %d, exiting.\n", s);
+ end = 1;
+}
/* Used to write process ID to file. Assume someone else will delete */
void log_pid(char *pidfile) {
@@ -208,6 +213,14 @@
struct hostent *host;
+ /* Handle keyboard interrupt SIGINT */
+ struct sigaction s;
+ s.sa_handler = (void *) signal_handler;
+ if ((0 != sigemptyset( &s.sa_mask )) && debug)
+ printf("sigemptyset failed.\n");
+ s.sa_flags = SA_RESETHAND;
+ if ((sigaction(SIGINT, &s, NULL) != 0) && debug)
+ printf("Could not register SIGINT signal handler.\n");
fd_set fds; /* For select() */
struct timeval idleTime; /* How long to select() */
@@ -478,8 +491,8 @@
/* Main select loop */
/******************************************************************/
- while (((starttime + timelimit) > time(NULL)) || (0 == timelimit)) {
-
+ while ((((starttime + timelimit) > time(NULL)) || (0 == timelimit)) && (!end)) {
+
FD_ZERO(&fds);
if (tun) FD_SET(tun->fd, &fds);
FD_SET(gsn->fd0, &fds);