[PATCH spice-server 4/5] reds: Use monotonic time for ticket expiration

[Frediano Ziglio <fziglio@xxxxxxxxxx>]

Avoid time adjustment issues.
For instance ticket validity can change when daylight time changes.

Signed-off-by: Frediano Ziglio <fziglio@xxxxxxxxxx>
---
 server/reds.c  | 5 ++---
 server/utils.h | 8 ++++++++
 2 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/server/reds.c b/server/reds.c
index 5c2e8cb0..b11bd7df 100644
--- a/server/reds.c
+++ b/server/reds.c
@@ -2099,8 +2099,7 @@ static void reds_handle_ticket(void *opaque)
             goto error;
         }
 
-        //todo: use monotonic time
-        time(&ltime);
+        ltime = spice_get_monotonic_time_s();
         expired = (reds->config->taTicket.expiration_time < ltime);
 
         if (expired) {
@@ -3835,7 +3834,7 @@ SPICE_GNUC_VISIBLE int spice_server_set_ticket(SpiceServer *reds,
     if (lifetime == 0) {
         reds->config->taTicket.expiration_time = INT_MAX;
     } else {
-        time_t now = time(NULL);
+        time_t now = spice_get_monotonic_time_s();
         reds->config->taTicket.expiration_time = now + lifetime;
     }
     if (passwd != NULL) {
diff --git a/server/utils.h b/server/utils.h
index 07878539..18ee6308 100644
--- a/server/utils.h
+++ b/server/utils.h
@@ -66,6 +66,14 @@ static inline red_time_t spice_get_monotonic_time_ns(void)
 
 #define MSEC_PER_SEC 1000
 
+static inline time_t spice_get_monotonic_time_s(void)
+{
+    struct timespec time;
+
+    clock_gettime(CLOCK_MONOTONIC, &time);
+    return time.tv_sec;
+}
+
 int rgb32_data_has_alpha(int width, int height, size_t stride,
                          const uint8_t *data, int *all_set_out);
 
-- 
2.17.1

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