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| author | marha <marha@users.sourceforge.net> | 2010-11-19 10:30:56 +0000 |
|---|---|---|
| committer | marha <marha@users.sourceforge.net> | 2010-11-19 10:30:56 +0000 |
| commit | 20a8b976130e3b2cfff5c3364169e61ec10291f3 (patch) | |
| tree | b2fbea50cfb846049fc690a252baec07397a1acc /tools/plink/pinger.c | |
| parent | 0b67cceb98ba4ab7b5cdaf9d6e9583d3c53802ea (diff) | |
| download | vcxsrv-20a8b976130e3b2cfff5c3364169e61ec10291f3.tar.gz vcxsrv-20a8b976130e3b2cfff5c3364169e61ec10291f3.tar.bz2 vcxsrv-20a8b976130e3b2cfff5c3364169e61ec10291f3.zip | |
Copied tools directory from trunk. Here the original versions will be checked in, so that we can update them and merge the changes back in.
Diffstat (limited to 'tools/plink/pinger.c')
| -rw-r--r-- | tools/plink/pinger.c | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/tools/plink/pinger.c b/tools/plink/pinger.c new file mode 100644 index 000000000..b6fde2456 --- /dev/null +++ b/tools/plink/pinger.c @@ -0,0 +1,71 @@ +/*
+ * pinger.c: centralised module that deals with sending TS_PING
+ * keepalives, to avoid replicating this code in multiple backends.
+ */
+
+#include "putty.h"
+
+struct pinger_tag {
+ int interval;
+ int pending;
+ long next;
+ Backend *back;
+ void *backhandle;
+};
+
+static void pinger_schedule(Pinger pinger);
+
+static void pinger_timer(void *ctx, long now)
+{
+ Pinger pinger = (Pinger)ctx;
+
+ if (pinger->pending && now - pinger->next >= 0) {
+ pinger->back->special(pinger->backhandle, TS_PING);
+ pinger->pending = FALSE;
+ pinger_schedule(pinger);
+ }
+}
+
+static void pinger_schedule(Pinger pinger)
+{
+ int next;
+
+ if (!pinger->interval) {
+ pinger->pending = FALSE; /* cancel any pending ping */
+ return;
+ }
+
+ next = schedule_timer(pinger->interval * TICKSPERSEC,
+ pinger_timer, pinger);
+ if (!pinger->pending || next < pinger->next) {
+ pinger->next = next;
+ pinger->pending = TRUE;
+ }
+}
+
+Pinger pinger_new(Config *cfg, Backend *back, void *backhandle)
+{
+ Pinger pinger = snew(struct pinger_tag);
+
+ pinger->interval = cfg->ping_interval;
+ pinger->pending = FALSE;
+ pinger->back = back;
+ pinger->backhandle = backhandle;
+ pinger_schedule(pinger);
+
+ return pinger;
+}
+
+void pinger_reconfig(Pinger pinger, Config *oldcfg, Config *newcfg)
+{
+ if (oldcfg->ping_interval != newcfg->ping_interval) {
+ pinger->interval = newcfg->ping_interval;
+ pinger_schedule(pinger);
+ }
+}
+
+void pinger_free(Pinger pinger)
+{
+ expire_timer_context(pinger);
+ sfree(pinger);
+}
|