package/ppp/patches/206-compensate_time_change.patch

   1 --- a/pppd/main.c
   2 +++ b/pppd/main.c
   3 @@ -90,6 +90,7 @@
   4  #include <sys/socket.h>
   5  #include <netinet/in.h>
   6  #include <arpa/inet.h>
   7 +#include <sys/sysinfo.h>
   8
   9  #include "pppd.h"
  10  #include "magic.h"
  11 @@ -228,6 +229,7 @@ static struct subprocess *children;
  12
  13  /* Prototypes for procedures local to this file. */
  14
  15 +static void check_time(void);
  16  static void setup_signals __P((void));
  17  static void create_pidfile __P((int pid));
  18  static void create_linkpidfile __P((int pid));
  19 @@ -535,6 +537,7 @@ main(argc, argv)
  20             info("Starting link");
  21         }
  22
  23 +       check_time();
  24         gettimeofday(&start_time, NULL);
  25         script_unsetenv("CONNECT_TIME");
  26         script_unsetenv("BYTES_SENT");
  27 @@ -1267,6 +1270,36 @@ struct   callout {
  28
  29  static struct callout *callout = NULL; /* Callout list */
  30  static struct timeval timenow;         /* Current time */
  31 +static long uptime_diff = 0;
  32 +static int uptime_diff_set = 0;
  33 +
  34 +static void check_time(void)
  35 +{
  36 +       long new_diff;
  37 +       struct timeval t;
  38 +       struct sysinfo i;
  39 +    struct callout *p;
  40 +
  41 +       gettimeofday(&t, NULL);
  42 +       sysinfo(&i);
  43 +       new_diff = t.tv_sec - i.uptime;
  44 +
  45 +       if (!uptime_diff_set) {
  46 +               uptime_diff = new_diff;
  47 +               uptime_diff_set = 1;
  48 +               return;
  49 +       }
  50 +
  51 +       if ((new_diff - 5 > uptime_diff) || (new_diff + 5 < uptime_diff)) {
  52 +               /* system time has changed, update counters and timeouts */
  53 +               info("System time change detected.");
  54 +               start_time.tv_sec += new_diff - uptime_diff;
  55 +
  56 +       for (p = callout; p != NULL; p = p->c_next)
  57 +                       p->c_time.tv_sec += new_diff - uptime_diff;
  58 +       }
  59 +       uptime_diff = new_diff;
  60 +}
  61
  62  /*
  63   * timeout - Schedule a timeout.
  64 @@ -1337,6 +1370,8 @@ calltimeout()
  65  {
  66      struct callout *p;
  67
  68 +       check_time();
  69 +
  70      while (callout != NULL) {
  71         p = callout;
  72
  73 @@ -1364,6 +1399,8 @@ timeleft(tvp)
  74  {
  75      if (callout == NULL)
  76         return NULL;
  77 +
  78 +       check_time();
  79
  80      gettimeofday(&timenow, NULL);
  81      tvp->tv_sec = callout->c_time.tv_sec - timenow.tv_sec;