My EMI2 provider from time to time leaves my connections in a zombie state:
althought I closed it, they see them as already open (they have problems
with their soft I guess). The result is that when I try to login again they
reject me with a "number of sessions exceeded" reason.
When that happens, the EMI2 driver gives up and does a shutdown. This is the
relevant code:
emimsg = make_emi60(privdata);
emi2_emimsg_send(conn, server, emimsg);
emimsg_destroy(emimsg);
result = wait_for_ack(privdata, server, 60, 30);
if (result == -2) {
/* Are SMSCs going to return any temporary errors? If so,
* testing for those error codes should be added here. */
error(0, "smsc_emi2: Server rejected our login, giving up");
conn->why_killed = SMSCCONN_KILLED_WRONG_PASSWORD;
conn_destroy(server);
return NULL;
}
else if (result == 0) {
error(0, "smsc_emi2: Got no reply to login attempt "
"within 30 s");
conn_destroy(server);
continue;
}
else if (result == -1) { /* Broken connection, already logged */
conn_destroy(server);
continue;
}
Eventually, the sessions they have will die and I will be able to login.
Others drivers will sleep and try again. I think this is the way to go, as
Kannel is meant to run 24/7 mostly unattended. The modifications needed to
do that are trivial. I have done it with good results.
What do you think?
Angel Fradejas.
