From 5e2471e7e38b68745668aa9c3b1d55297895bba2 Mon Sep 17 00:00:00 2001
From: Guus Sliepen <guus@meshlink.io>
Date: Fri, 5 Dec 2014 22:08:21 +0100
Subject: [PATCH] Change utcp_timeout() to return a struct timeval.

This is what MeshLink uses internally as well, and prevents confusion over which units the old int
return value had.
---
 test.c | 4 ++--
 utcp.c | 6 ++----
 utcp.h | 4 +++-
 3 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/test.c b/test.c
index 757364f..922099a 100644
--- a/test.c
+++ b/test.c
@@ -100,10 +100,10 @@ int main(int argc, char *argv[]) {
 	};
 
 	char buf[102400];
-	int timeout = utcp_timeout(u);
+	struct timeval timeout = utcp_timeout(u);
 
 	while(dir) {
-		poll(fds, 2, timeout);
+		poll(fds, 2, timeout.tv_sec * 1000 + timeout.tv_usec / 1000);
 
 		if(fds[0].revents) {
 			int len = read(0, buf, sizeof buf);
diff --git a/utcp.c b/utcp.c
index 391706f..2ef56ea 100644
--- a/utcp.c
+++ b/utcp.c
@@ -1061,7 +1061,7 @@ static void retransmit(struct utcp_connection *c) {
  * The return value is the time to the next timeout in milliseconds,
  * or maybe a negative value if the timeout is infinite.
  */
-int utcp_timeout(struct utcp *utcp) {
+struct timeval utcp_timeout(struct utcp *utcp) {
 	struct timeval now;
 	gettimeofday(&now, NULL);
 	struct timeval next = {now.tv_sec + 3600, now.tv_usec};
@@ -1111,9 +1111,7 @@ int utcp_timeout(struct utcp *utcp) {
 
 	struct timeval diff;
 	timersub(&next, &now, &diff);
-	if(diff.tv_sec < 0)
-		return 0;
-	return diff.tv_sec * 1000 + diff.tv_usec / 1000;
+	return diff;
 }
 
 struct utcp *utcp_init(utcp_accept_t accept, utcp_pre_accept_t pre_accept, utcp_send_t send, void *priv) {
diff --git a/utcp.h b/utcp.h
index 53a107f..7ebca73 100644
--- a/utcp.h
+++ b/utcp.h
@@ -23,6 +23,8 @@
 #include <unistd.h>
 #include <stdint.h>
 #include <stdbool.h>
+// TODO: Windows
+#include <sys/time.h>
 
 #ifndef UTCP_INTERNAL
 struct utcp {
@@ -56,7 +58,7 @@ extern ssize_t utcp_recv(struct utcp *utcp, const void *data, size_t len);
 extern int utcp_close(struct utcp_connection *connection);
 extern int utcp_abort(struct utcp_connection *connection);
 extern int utcp_shutdown(struct utcp_connection *connection, int how);
-extern int utcp_timeout(struct utcp *utcp);
+extern struct timeval utcp_timeout(struct utcp *utcp);
 extern void utcp_set_recv_cb(struct utcp_connection *connection, utcp_recv_t recv);
 extern void utcp_set_poll_cb(struct utcp_connection *connection, utcp_poll_t poll);
 
-- 
2.39.5