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cwc: do not send ECM requests when NOKs are received

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Do not send ECM requests to the card reader when ECMs cannot be read.

Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Jaroslav Kysela 2012-04-12 20:03:46 +02:00
parent e5eef814f2
commit c8af1f21d4
1 changed files with 36 additions and 5 deletions
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41
src/cwc.c
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@ -765,20 +765,48 @@ handle_ecm_reply(cwc_service_t *ct, ecm_section_t *es, uint8_t *msg,
if(ct->cs_okchannel == es->es_channel)
ct->cs_okchannel = -1;
if (es->es_nok < 3)
es->es_nok++;
if(ct->cs_keystate == CS_FORBIDDEN)
return; // We already know it's bad
es->es_nok = 1;
if (es->es_nok > 2) {
tvhlog(LOG_DEBUG, "cwc",
"Too many NOKs for service \"%s\"%s from %s:%i",
t->s_svcname, chaninfo, ct->cs_cwc->cwc_hostname,
ct->cs_cwc->cwc_port);
goto forbid;
}
TAILQ_FOREACH(cwc2, &cwcs, cwc_link) {
LIST_FOREACH(ct2, &cwc2->cwc_services, cs_link) {
if (ct != ct2 && ct2->cs_service == t &&
ct2->cs_keystate == CS_RESOLVED) {
tvhlog(LOG_DEBUG, "cwc",
"NOK from %s:%i: Already has a key for service \"%s\", from %s:%i",
ct->cs_cwc->cwc_hostname, ct->cs_cwc->cwc_port,
t->s_svcname, ct2->cs_cwc->cwc_hostname, ct2->cs_cwc->cwc_port);
es->es_nok = 3; /* do not send more ECM requests */
goto forbid;
}
}
}
tvhlog(LOG_DEBUG, "cwc", "Received NOK for service \"%s\"%s (seqno: %d "
"Req delay: %lld ms)", t->s_svcname, chaninfo, seq, delay);
forbid:
LIST_FOREACH(ep, &ct->cs_pids, ep_link) {
for(i = 0; i <= ep->ep_last_section; i++)
if(ep->ep_sections[i] == NULL ||
ep->ep_sections[i]->es_pending ||
ep->ep_sections[i]->es_nok == 0)
return;
if(ep->ep_sections[i] == NULL) {
if(es->es_nok < 2) /* only first hit is allowed */
return;
} else {
if(ep->ep_sections[i]->es_pending ||
ep->ep_sections[i]->es_nok == 0)
return;
}
}
tvhlog(LOG_ERR, "cwc",
"Can not descramble service \"%s\", access denied (seqno: %d "
@ -1594,6 +1622,9 @@ cwc_table_input(struct th_descrambler *td, struct service *t,
es = ep->ep_sections[section];
if (es->es_nok > 2)
break; /* too many NOK responses in a row */
if(es->es_ecmsize == len && !memcmp(es->es_ecm, data, len))
break; /* key already sent */