From 309c7b71e66f45225f369591caf2441bfa2d1670 Mon Sep 17 00:00:00 2001
From: Russ Dill <Russ.Dill@asu.edu>
Date: Wed, 19 May 2004 08:29:05 +0000
Subject: [PATCH] fix timewarp in client (server fix later)

---
 networking/udhcp/arpping.c | 6 +++---
 networking/udhcp/common.c  | 9 +++++++++
 networking/udhcp/common.h  | 1 +
 networking/udhcp/dhcpc.c   | 6 +++---
 4 files changed, 16 insertions(+), 6 deletions(-)

diff --git a/networking/udhcp/arpping.c b/networking/udhcp/arpping.c
index ab4c6d20c..7cc2be42e 100644
--- a/networking/udhcp/arpping.c
+++ b/networking/udhcp/arpping.c
@@ -79,7 +79,7 @@ int arpping(uint32_t yiaddr, uint32_t ip, uint8_t *mac, char *interface)
 
 	/* wait arp reply, and check it */
 	tm.tv_usec = 0;
-	time(&prevTime);
+	prevTime = uptime();
 	while (timeout > 0) {
 		FD_ZERO(&fdset);
 		FD_SET(s, &fdset);
@@ -97,8 +97,8 @@ int arpping(uint32_t yiaddr, uint32_t ip, uint8_t *mac, char *interface)
 				break;
 			}
 		}
-		timeout -= time(NULL) - prevTime;
-		time(&prevTime);
+		timeout -= uptime() - prevTime;
+		prevTime = uptime();
 	}
 	close(s);
 	DEBUG(LOG_INFO, "%salid arp replies for this address", rv ? "No v" : "V");	
diff --git a/networking/udhcp/common.c b/networking/udhcp/common.c
index 4f856ee6c..ce76c516d 100644
--- a/networking/udhcp/common.c
+++ b/networking/udhcp/common.c
@@ -29,6 +29,7 @@
 #include <signal.h>
 #include <paths.h>
 #include <sys/socket.h>
+#include <sys/sysinfo.h>
 #include <stdarg.h>
 
 #include "common.h"
@@ -37,6 +38,14 @@
 
 static int daemonized;
 
+long uptime(void)
+{
+	struct sysinfo info;
+	sysinfo(&info);
+	printf("uptime %d\n", info.uptime);
+	return info.uptime;
+}
+
 
 /*
  * This function makes sure our first socket calls
diff --git a/networking/udhcp/common.h b/networking/udhcp/common.h
index cdc51cf8a..ca19a2497 100644
--- a/networking/udhcp/common.h
+++ b/networking/udhcp/common.h
@@ -39,6 +39,7 @@ enum syslog_levels {
 #include <syslog.h>
 #endif
 
+long uptime(void);
 void background(const char *pidfile);
 void start_log_and_pid(const char *client_server, const char *pidfile);
 void background(const char *pidfile);
diff --git a/networking/udhcp/dhcpc.c b/networking/udhcp/dhcpc.c
index dda678933..449b51763 100644
--- a/networking/udhcp/dhcpc.c
+++ b/networking/udhcp/dhcpc.c
@@ -188,7 +188,7 @@ int main(int argc, char *argv[])
 	int c, len;
 	struct dhcpMessage packet;
 	struct in_addr temp_addr;
-	time_t now;
+	long now;
 	int max_fd;
 	int sig;
 
@@ -290,7 +290,7 @@ int main(int argc, char *argv[])
 
 	for (;;) {
 
-		tv.tv_sec = timeout - time(0);
+		tv.tv_sec = timeout - uptime();
 		tv.tv_usec = 0;
 
 		if (listen_mode != LISTEN_NONE && fd < 0) {
@@ -310,7 +310,7 @@ int main(int argc, char *argv[])
 			retval = select(max_fd + 1, &rfds, NULL, NULL, &tv);
 		} else retval = 0; /* If we already timed out, fall through */
 
-		now = time(0);
+		now = uptime();
 		if (retval == 0) {
 			/* timeout dropped to zero */
 			switch (state) {
-- 
2.25.1