[Server] Moves signal handling code to earlier in fwknopd initialization

Also serves to de-duplicate code slightly

server/fwknopd.c

@@ -128,6 +128,12 @@ main(int argc, char **argv)
         if(!opts.afl_fuzzing
                 && ! check_dir_path((const char *)opts.config[CONF_FWKNOP_RUN_DIR], "Run", 0))
             clean_exit(&opts, NO_FW_CLEANUP, EXIT_FAILURE);
+        /* Initialize our signal handlers. You can check the return value for
+         * the number of signals that were *not* set.  Those that were not set
+         * will be listed in the log/stderr output.
+        */
+        if(set_sig_handlers() > 0)
+            log_msg(LOG_ERR, "Errors encountered when setting signal handlers.");
 
         /* Initialize the firewall rules handler based on the fwknopd.conf
          * file, but (for iptables firewalls) don't flush any rules or create

server/nfq_capture.c

@@ -165,13 +165,6 @@ nfq_capture(fko_srv_options_t *opts)
         exit(EXIT_FAILURE);
     }
 
-    /* Initialize our signal handlers. You can check the return value for
-     * the number of signals that were *not* set.  Those that were not set
-     * will be listed in the log/stderr output.
-    */
-    if(set_sig_handlers() > 0)
-        log_msg(LOG_ERR, "Errors encountered when setting signal handlers.");
-
     log_msg(LOG_INFO, "Starting fwknopd main event loop.");
 
     /* Jump into our home-grown packet cature loop.

server/pcap_capture.c

@@ -183,13 +183,6 @@ pcap_capture(fko_srv_options_t *opts)
         clean_exit(opts, FW_CLEANUP, EXIT_FAILURE);
     }
 
-    /* Initialize our signal handlers. You can check the return value for
-     * the number of signals that were *not* set.  Those that were not set
-     * will be listed in the log/stderr output.
-    */
-    if(set_sig_handlers() > 0)
-        log_msg(LOG_ERR, "Errors encountered when setting signal handlers.");
-
     log_msg(LOG_INFO, "Starting fwknopd main event loop.");
 
     /* Jump into our home-grown packet cature loop.

server/udp_server.c

@@ -109,13 +109,6 @@ run_udp_server(fko_srv_options_t *opts)
         return -1;
     }
 
-    /* Initialize our signal handlers. You can check the return value for
-     * the number of signals that were *not* set.  Those that were not set
-     * will be listed in the log/stderr output.
-    */
-    if(set_sig_handlers() > 0)
-        log_msg(LOG_ERR, "Errors encountered when setting signal handlers.");
-
     FD_ZERO(&sfd_set);
 
     /* Now loop and receive SPA packets