From: Matt Caswell <matt@openssl.org>
Date: Mon, 25 May 2015 22:57:41 +0000 (+0100)
Subject: Handle unsigned struct timeval members
X-Git-Tag: OpenSSL_1_0_2b~48
X-Git-Url: https://git.openssl.org/gitweb/?a=commitdiff_plain;h=e40d7c1f3a31fa614760f7a9b75ae40ece5ff8bd;p=openssl.git

Handle unsigned struct timeval members

The members of struct timeval on OpenVMS are unsigned. The logic for
calculating timeouts needs adjusting to deal with this.

RT#3862

Reviewed-by: Richard Levitte <levitte@openssl.org>
(cherry picked from commit fc52ac9028b9492fb086ba35a3352ea46e03ecfc)
---

diff --git a/crypto/bio/bss_dgram.c b/crypto/bio/bss_dgram.c
index ac03a6d04d..dc4479f642 100644
--- a/crypto/bio/bss_dgram.c
+++ b/crypto/bio/bss_dgram.c
@@ -303,16 +303,17 @@ static void dgram_adjust_rcv_timeout(BIO *b)
 
         /* Calculate time left until timer expires */
         memcpy(&timeleft, &(data->next_timeout), sizeof(struct timeval));
-        timeleft.tv_sec -= timenow.tv_sec;
-        timeleft.tv_usec -= timenow.tv_usec;
-        if (timeleft.tv_usec < 0) {
+        if (timeleft.tv_usec < timenow.tv_usec) {
+            timeleft.tv_usec = 1000000 - timenow.tv_usec + timeleft.tv_usec;
             timeleft.tv_sec--;
-            timeleft.tv_usec += 1000000;
+        } else {
+            timeleft.tv_usec -= timenow.tv_usec;
         }
-
-        if (timeleft.tv_sec < 0) {
+        if (timeleft.tv_sec < timenow.tv_sec) {
             timeleft.tv_sec = 0;
             timeleft.tv_usec = 1;
+        } else {
+            timeleft.tv_sec -= timenow.tv_sec;
         }
 
         /*