j3d1/tinc
1
0
Fork 0
Code Issues 1 Pull requests Releases Wiki Activity

Merge pull request #4 from lemoer/patch-fix-pong-handler

Browse source 
Patchset to improve the pong handler

It seem that we have some troll in the network or something is broken.
This commit is contained in:
Rafał Leśniak 2016-05-18 22:53:45 +02:00
commit b3607cd5f9
1 changed files with 20 additions and 8 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

28
src/protocol_misc.c
View file

@ -123,12 +123,19 @@ bool send_pong(connection_t *c) {
}
bool pong_h(connection_t *c, const char *request) {
int current_rtt = 0;
int tv_sec, tv_usec, ret;
int ret;
long current_rtt = 0;
long tv_sec, tv_usec;
struct timeval _now;
if (!c->status.pinged) {
logger(DEBUG_ALWAYS, LOG_WARNING, "received pong without ping");
return false;
}
c->status.pinged = false;
ret = sscanf(request, "%*d %d %d", &tv_sec, &tv_usec);
ret = sscanf(request, "%*d %ld %ld", &tv_sec, &tv_usec);
gettimeofday(&_now, NULL);
if (ret != 2) {
@ -137,12 +144,17 @@ bool pong_h(connection_t *c, const char *request) {
tv_usec = c->last_ping_time.tv_usec;
}
/* RTT should be in ms */
current_rtt = (_now.tv_sec - tv_sec)*1000;
/* Compute diff between usec */
current_rtt += _now.tv_usec >= tv_usec ? _now.tv_usec - tv_usec : tv_usec - _now.tv_usec;
if (_now.tv_sec - tv_sec > 2*pingtimeout) {
/* timeout_handler should close the meta connection after pingtimeout.
* So if we still receive such pong, something is fishy. */
logger(DEBUG_ALWAYS, LOG_ERR, "bogus pong received from %s (%s)", c->name, c->hostname);
return false;
}
current_rtt = current_rtt/1000;
/* current_rtt should be in ms */
current_rtt += (_now.tv_sec - tv_sec) * 1000;
/* Compute diff between usec */
current_rtt += (_now.tv_usec - tv_usec) / 1000;
if (c->edge->avg_rtt == 0)
c->edge->avg_rtt = current_rtt;