From fc55c723c4ecebabf12c32caddd0f9bc9d169ed4 Mon Sep 17 00:00:00 2001
From: Marc Hoersken <info@marc-hoersken.de>
Date: Wed, 27 May 2020 17:24:21 +0200
Subject: select: add overflow checks for timeval conversions

Using time_t and suseconds_t if suseconds_t is available,
long on Windows (maybe others in the future) and int elsewhere.

Also handle case of ULONG_MAX being greater or equal to INFINITE.

Assisted-by: Jay Satiro
Reviewed-by: Daniel Stenberg

Part of #5343
---
 configure.ac | 13 +++++++++++++
 1 file changed, 13 insertions(+)

(limited to 'configure.ac')

diff --git a/configure.ac b/configure.ac
index 8161eee94..949ce12c0 100755
--- a/configure.ac
+++ b/configure.ac
@@ -4064,6 +4064,19 @@ AC_CHECK_TYPE(sa_family_t,
 #endif
 ])
 
+# check for suseconds_t
+AC_CHECK_TYPE([suseconds_t],[
+  AC_DEFINE(HAVE_SUSECONDS_T, 1,
+    [Define to 1 if suseconds_t is an available type.])
+], ,[
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef HAVE_SYS_TIME_H
+#include <sys/time.h>
+#endif
+])
+
 AC_MSG_CHECKING([if time_t is unsigned])
 CURL_RUN_IFELSE(
   [
-- 
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