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-rw-r--r--package/ppp/patches/206-compensate_time_change.patch164
1 files changed, 164 insertions, 0 deletions
diff --git a/package/ppp/patches/206-compensate_time_change.patch b/package/ppp/patches/206-compensate_time_change.patch
new file mode 100644
index 0000000000..1566b80c9d
--- /dev/null
+++ b/package/ppp/patches/206-compensate_time_change.patch
@@ -0,0 +1,164 @@
+diff -Naur ppp-2.4.4.orig/pppd/main.c ppp-2.4.4/pppd/main.c
+--- ppp-2.4.4.orig/pppd/main.c 2009-05-07 22:25:24.000000000 -0400
++++ ppp-2.4.4/pppd/main.c 2009-05-07 22:22:40.000000000 -0400
+@@ -90,6 +90,7 @@
+ #include <sys/socket.h>
+ #include <netinet/in.h>
+ #include <arpa/inet.h>
++#include <sys/sysinfo.h>
+
+ #include "pppd.h"
+ #include "magic.h"
+@@ -227,6 +228,7 @@
+
+ /* Prototypes for procedures local to this file. */
+
++static void check_time(void);
+ static void setup_signals __P((void));
+ static void create_pidfile __P((int pid));
+ static void create_linkpidfile __P((int pid));
+@@ -532,6 +534,7 @@
+ info("Starting link");
+ }
+
++ check_time();
+ gettimeofday(&start_time, NULL);
+ script_unsetenv("CONNECT_TIME");
+ script_unsetenv("BYTES_SENT");
+@@ -1264,6 +1267,36 @@
+
+ static struct callout *callout = NULL; /* Callout list */
+ static struct timeval timenow; /* Current time */
++static long uptime_diff = 0;
++static int uptime_diff_set = 0;
++
++static void check_time(void)
++{
++ long new_diff;
++ struct timeval t;
++ struct sysinfo i;
++ struct callout *p;
++
++ gettimeofday(&t, NULL);
++ sysinfo(&i);
++ new_diff = t.tv_sec - i.uptime;
++
++ if (!uptime_diff_set) {
++ uptime_diff = new_diff;
++ uptime_diff_set = 1;
++ return;
++ }
++
++ if ((new_diff - 5 > uptime_diff) || (new_diff + 5 < uptime_diff)) {
++ /* system time has changed, update counters and timeouts */
++ info("System time change detected.");
++ start_time.tv_sec += new_diff - uptime_diff;
++
++ for (p = callout; p != NULL; p = p->c_next)
++ p->c_time.tv_sec += new_diff - uptime_diff;
++ }
++ uptime_diff = new_diff;
++}
+
+ /*
+ * timeout - Schedule a timeout.
+@@ -1334,6 +1367,8 @@
+ {
+ struct callout *p;
+
++ check_time();
++
+ while (callout != NULL) {
+ p = callout;
+
+@@ -1361,6 +1396,8 @@
+ {
+ if (callout == NULL)
+ return NULL;
++
++ check_time();
+
+ gettimeofday(&timenow, NULL);
+ tvp->tv_sec = callout->c_time.tv_sec - timenow.tv_sec;
+diff -Naur ppp-2.4.4.orig/pppd/main.c ppp-2.4.4/pppd/main.c
+--- ppp-2.4.4.orig/pppd/main.c 2009-05-07 22:25:24.000000000 -0400
++++ ppp-2.4.4/pppd/main.c 2009-05-07 22:22:40.000000000 -0400
+@@ -90,6 +90,7 @@
+ #include <sys/socket.h>
+ #include <netinet/in.h>
+ #include <arpa/inet.h>
++#include <sys/sysinfo.h>
+
+ #include "pppd.h"
+ #include "magic.h"
+@@ -227,6 +228,7 @@
+
+ /* Prototypes for procedures local to this file. */
+
++static void check_time(void);
+ static void setup_signals __P((void));
+ static void create_pidfile __P((int pid));
+ static void create_linkpidfile __P((int pid));
+@@ -532,6 +534,7 @@
+ info("Starting link");
+ }
+
++ check_time();
+ gettimeofday(&start_time, NULL);
+ script_unsetenv("CONNECT_TIME");
+ script_unsetenv("BYTES_SENT");
+@@ -1264,6 +1267,36 @@
+
+ static struct callout *callout = NULL; /* Callout list */
+ static struct timeval timenow; /* Current time */
++static long uptime_diff = 0;
++static int uptime_diff_set = 0;
++
++static void check_time(void)
++{
++ long new_diff;
++ struct timeval t;
++ struct sysinfo i;
++ struct callout *p;
++
++ gettimeofday(&t, NULL);
++ sysinfo(&i);
++ new_diff = t.tv_sec - i.uptime;
++
++ if (!uptime_diff_set) {
++ uptime_diff = new_diff;
++ uptime_diff_set = 1;
++ return;
++ }
++
++ if ((new_diff - 5 > uptime_diff) || (new_diff + 5 < uptime_diff)) {
++ /* system time has changed, update counters and timeouts */
++ info("System time change detected.");
++ start_time.tv_sec += new_diff - uptime_diff;
++
++ for (p = callout; p != NULL; p = p->c_next)
++ p->c_time.tv_sec += new_diff - uptime_diff;
++ }
++ uptime_diff = new_diff;
++}
+
+ /*
+ * timeout - Schedule a timeout.
+@@ -1334,6 +1367,8 @@
+ {
+ struct callout *p;
+
++ check_time();
++
+ while (callout != NULL) {
+ p = callout;
+
+@@ -1361,6 +1396,8 @@
+ {
+ if (callout == NULL)
+ return NULL;
++
++ check_time();
+
+ gettimeofday(&timenow, NULL);
+ tvp->tv_sec = callout->c_time.tv_sec - timenow.tv_sec;