diff options
Diffstat (limited to 'package/ppp/patches/206-compensate_time_change.patch')
-rw-r--r-- | package/ppp/patches/206-compensate_time_change.patch | 94 |
1 files changed, 0 insertions, 94 deletions
diff --git a/package/ppp/patches/206-compensate_time_change.patch b/package/ppp/patches/206-compensate_time_change.patch deleted file mode 100644 index fb6c656..0000000 --- a/package/ppp/patches/206-compensate_time_change.patch +++ /dev/null @@ -1,94 +0,0 @@ -pppd: Watch out for time warps - -On many embedded systems there is no battery backed RTC and a proper system -time only becomes available through NTP after establishing a connection. - -When the clock suddenly jumps forward, the internal accounting (connect time) -is confused resulting in unreliable data. - -This patch implements periodic clock checking to look for time warps, if one -is detected, the internal counters are adjusted accordingly. - -Signed-off-by: Jo-Philipp Wich <jow@openwrt.org> - ---- a/pppd/main.c -+++ b/pppd/main.c -@@ -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" -@@ -228,6 +229,7 @@ static struct subprocess *children; - - /* 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)); -@@ -535,6 +537,7 @@ main(argc, argv) - info("Starting link"); - } - -+ check_time(); - gettimeofday(&start_time, NULL); - script_unsetenv("CONNECT_TIME"); - script_unsetenv("BYTES_SENT"); -@@ -1267,6 +1270,36 @@ struct callout { - - 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. -@@ -1337,6 +1370,8 @@ calltimeout() - { - struct callout *p; - -+ check_time(); -+ - while (callout != NULL) { - p = callout; - -@@ -1364,6 +1399,8 @@ timeleft(tvp) - { - if (callout == NULL) - return NULL; -+ -+ check_time(); - - gettimeofday(&timenow, NULL); - tvp->tv_sec = callout->c_time.tv_sec - timenow.tv_sec; |