You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
120 lines
3.7 KiB
120 lines
3.7 KiB
From 3c973ad92d317df736d5a8fde67baba6b102d91e Mon Sep 17 00:00:00 2001
|
|
From: Simon Kelley <simon@thekelleys.org.uk>
|
|
Date: Sun, 14 Jan 2018 21:05:37 +0000
|
|
Subject: [PATCH] Use SIGINT (instead of overloading SIGHUP) to turn on DNSSEC
|
|
time validation.
|
|
|
|
---
|
|
src/dnsmasq.c | 36 +++++++++++++++++++++++++-----------
|
|
src/dnsmasq.h | 1 +
|
|
src/helper.c | 3 ++-
|
|
5 files changed, 38 insertions(+), 14 deletions(-)
|
|
|
|
--- a/src/dnsmasq.c
|
|
+++ b/src/dnsmasq.c
|
|
@@ -137,7 +137,8 @@ int main (int argc, char **argv)
|
|
sigaction(SIGTERM, &sigact, NULL);
|
|
sigaction(SIGALRM, &sigact, NULL);
|
|
sigaction(SIGCHLD, &sigact, NULL);
|
|
-
|
|
+ sigaction(SIGINT, &sigact, NULL);
|
|
+
|
|
/* ignore SIGPIPE */
|
|
sigact.sa_handler = SIG_IGN;
|
|
sigaction(SIGPIPE, &sigact, NULL);
|
|
@@ -815,7 +816,7 @@ int main (int argc, char **argv)
|
|
|
|
daemon->dnssec_no_time_check = option_bool(OPT_DNSSEC_TIME);
|
|
if (option_bool(OPT_DNSSEC_TIME) && !daemon->back_to_the_future)
|
|
- my_syslog(LOG_INFO, _("DNSSEC signature timestamps not checked until first cache reload"));
|
|
+ my_syslog(LOG_INFO, _("DNSSEC signature timestamps not checked until receipt of SIGINT"));
|
|
|
|
if (rc == 1)
|
|
my_syslog(LOG_INFO, _("DNSSEC signature timestamps not checked until system time valid"));
|
|
@@ -1142,7 +1143,7 @@ static void sig_handler(int sig)
|
|
{
|
|
/* ignore anything other than TERM during startup
|
|
and in helper proc. (helper ignore TERM too) */
|
|
- if (sig == SIGTERM)
|
|
+ if (sig == SIGTERM || sig == SIGINT)
|
|
exit(EC_MISC);
|
|
}
|
|
else if (pid != getpid())
|
|
@@ -1168,6 +1169,15 @@ static void sig_handler(int sig)
|
|
event = EVENT_DUMP;
|
|
else if (sig == SIGUSR2)
|
|
event = EVENT_REOPEN;
|
|
+ else if (sig == SIGINT)
|
|
+ {
|
|
+ /* Handle SIGINT normally in debug mode, so
|
|
+ ctrl-c continues to operate. */
|
|
+ if (option_bool(OPT_DEBUG))
|
|
+ exit(EC_MISC);
|
|
+ else
|
|
+ event = EVENT_TIME;
|
|
+ }
|
|
else
|
|
return;
|
|
|
|
@@ -1295,14 +1305,7 @@ static void async_event(int pipe, time_t
|
|
{
|
|
case EVENT_RELOAD:
|
|
daemon->soa_sn++; /* Bump zone serial, as it may have changed. */
|
|
-
|
|
-#ifdef HAVE_DNSSEC
|
|
- if (daemon->dnssec_no_time_check && option_bool(OPT_DNSSEC_VALID) && option_bool(OPT_DNSSEC_TIME))
|
|
- {
|
|
- my_syslog(LOG_INFO, _("now checking DNSSEC signature timestamps"));
|
|
- daemon->dnssec_no_time_check = 0;
|
|
- }
|
|
-#endif
|
|
+
|
|
/* fall through */
|
|
|
|
case EVENT_INIT:
|
|
@@ -1411,6 +1414,17 @@ static void async_event(int pipe, time_t
|
|
poll_resolv(0, 1, now);
|
|
break;
|
|
|
|
+ case EVENT_TIME:
|
|
+#ifdef HAVE_DNSSEC
|
|
+ if (daemon->dnssec_no_time_check && option_bool(OPT_DNSSEC_VALID) && option_bool(OPT_DNSSEC_TIME))
|
|
+ {
|
|
+ my_syslog(LOG_INFO, _("now checking DNSSEC signature timestamps"));
|
|
+ daemon->dnssec_no_time_check = 0;
|
|
+ clear_cache_and_reload(now);
|
|
+ }
|
|
+#endif
|
|
+ break;
|
|
+
|
|
case EVENT_TERM:
|
|
/* Knock all our children on the head. */
|
|
for (i = 0; i < MAX_PROCS; i++)
|
|
--- a/src/dnsmasq.h
|
|
+++ b/src/dnsmasq.h
|
|
@@ -175,6 +175,7 @@ struct event_desc {
|
|
#define EVENT_NEWROUTE 23
|
|
#define EVENT_TIME_ERR 24
|
|
#define EVENT_SCRIPT_LOG 25
|
|
+#define EVENT_TIME 26
|
|
|
|
/* Exit codes. */
|
|
#define EC_GOOD 0
|
|
--- a/src/helper.c
|
|
+++ b/src/helper.c
|
|
@@ -97,13 +97,14 @@ int create_helper(int event_fd, int err_
|
|
return pipefd[1];
|
|
}
|
|
|
|
- /* ignore SIGTERM, so that we can clean up when the main process gets hit
|
|
+ /* ignore SIGTERM and SIGINT, so that we can clean up when the main process gets hit
|
|
and SIGALRM so that we can use sleep() */
|
|
sigact.sa_handler = SIG_IGN;
|
|
sigact.sa_flags = 0;
|
|
sigemptyset(&sigact.sa_mask);
|
|
sigaction(SIGTERM, &sigact, NULL);
|
|
sigaction(SIGALRM, &sigact, NULL);
|
|
+ sigaction(SIGINT, &sigact, NULL);
|
|
|
|
if (!option_bool(OPT_DEBUG) && uid != 0)
|
|
{
|
|
|