Implement update checking using the command "BLABOUNCER UPDATECHECK", or optionally (enabled by default, toggled with configuration option "checkupdates") at startup and successful client authentication.HEADmaster

This is implemented using a DNS TXT record check to the domain "version.blabouncer.blatech.net".

1 files changed, 22 insertions, 0 deletions

diff --git a/blabouncer.c b/blabouncer.c
index b3e239d..443c75c 100644
--- a/blabouncer.c
+++ b/blabouncer.c
@@ -1331,6 +1331,13 @@ int main(int argc, char *argv[]) {
     strncat(conffailmsg, "Error getting 'alertautheddisconnect' from configuration file.\n", sizeof conffailmsg - strlen(conffailmsg) - 1);
   }
 
+  // Is check for updates upon startup and successful client authentication enabled?
+  settings.checkupdates = getconfint("checkupdates", settings.conffile);
+  if (errno == ECONFINT) {
+    conffail = 1;
+    strncat(conffailmsg, "Error getting 'checkupdates' from configuration file.\n", sizeof conffailmsg - strlen(conffailmsg) - 1);
+  }
+
   // How many debug logs should we keep?
   settings.debugkeep = getconfint("debugkeep", settings.conffile);
   if (errno == ECONFINT) {
@@ -1439,6 +1446,21 @@ int main(int argc, char *argv[]) {
 
   debugprint(DEBUG_SOME, "Using configuration file '%s'.\n", settings.conffile);
 
+  // Check for updates (if enabled in configuration file with checkupdates = "1")
+  if (settings.checkupdates) {
+    debugprint(DEBUG_SOME, "Checking for blabouncer updates (checkupdates = \"0\" to disable)...\n");
+    char version[MAXDNSTXTLEN];
+    version[0] = '\0';
+    int ret = checkversion(version);
+    if (ret == 1) {
+      debugprint(DEBUG_SOME, "main(): blabouncer appears to be up to date.\n");
+    } else if (ret == -1) {
+      debugprint(DEBUG_SOME, "main(): blabouncer appears to be out of date, latest version is %s.\n", version);
+    } else {
+      debugprint(DEBUG_CRIT, "main(): Version check failed!\n");
+    }
+  }
+
   // Unless specified otherwise on the command line, fork to background
   if (settings.background) {
     pid_t pid, sid;