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dvbapi.c
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/*
- * Copyright (C) 2014-2020 Catalin Toda <[email protected]>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*
*/
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <time.h>
#include <unistd.h>
#include <stdio.h>
#include <errno.h>
#include <unistd.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <net/if.h>
#include <fcntl.h>
#include <ctype.h>
#include "utils.h"
#include "dvb.h"
#include "socketworks.h"
#include "minisatip.h"
#include "dvbapi.h"
#include "adapter.h"
#include "tables.h"
extern struct struct_opts opts;
const int64_t DVBAPI_ITEM = 0x1000000000000;
int dvbapi_sock = -1;
int sock;
int dvbapi_is_enabled = 0;
int enabledKeys = 0;
int network_mode = 1;
int dvbapi_protocol_version = DVBAPI_PROTOCOL_VERSION;
SKey *keys[MAX_KEYS];
SMutex keys_mutex;
unsigned char read_buffer[1500];
#ifndef DISABLE_DVBCSA
dvbapi_op csa_op;
#endif
#ifndef DISABLE_DVBAES
dvbapi_op aes_op;
#endif
dvbapi_op *ops[] =
{
#ifndef DISABLE_DVBCSA
&csa_op,
#endif
#ifndef DISABLE_DVBAES
&aes_op,
#endif
NULL };
#define TEST_WRITE(a) {\
mutex_lock(&keys_mutex);\
if((a)<=0) \
{\
LOG("write to dvbapi socket failed, closing socket %d",sock);\
sockets_del(dvbapi_sock);\
sock = 0;\
dvbapi_sock = -1;\
dvbapi_is_enabled = 0;\
}\
mutex_unlock(&keys_mutex);\
}
#define POINTER_TYPE_ECM ((void *)-TYPE_ECM)
#define POINTER_1 ((void *)1)
void invalidate_adapter(int aid)
{
int64_t pk_key = DVBAPI_ITEM + ((1 + aid) << 24) + 1;
SKey **pid_to_key = (SKey **) getItem(pk_key);
if (pid_to_key)
pid_to_key[0] = POINTER_1; // invalidate the cache
}
#define dvbapi_copy32r(v, a, i) if(change_endianness)copy32rr(v, a, i) else copy32r(v, a, i)
#define dvbapi_copy16r(v, a, i) if(change_endianness)copy16rr(v, a, i) else copy16r(v, a, i)
int dvbapi_reply(sockets * s)
{
unsigned char *b = s->buf;
SKey *k;
int change_endianness = 0;
unsigned int op, _pid;
int k_id, a_id = 0, pos = 0;
int demux, filter;
SPid *p;
if (s->rlen == 0)
{
send_client_info(s);
return 0;
}
while (pos < s->rlen)
{
int op1;
b = s->buf + pos;
copy32r(op, b, 0);
op1 = op & 0xFFFFFF;
change_endianness = 0;
if (op1 == CA_SET_DESCR_X || op1 == CA_SET_DESCR_AES_X
|| op1 == CA_SET_PID_X || op1 == DMX_STOP_X
|| op1 == DMX_SET_FILTER_X || op1 == CA_SET_DESCR_AES_X)
{ // change endianness
op = 0x40000000 | ((op1 & 0xFF) << 16) | (op1 & 0xFF00)
| ((op1 & 0xFF0000) >> 16);
if (!(op & 0xFF0000))
op &= 0xFFFFFF;
LOG("dvbapi: changing endianness from %06X to %08X", op1, op);
//b ++;
//pos ++;
b[4] = b[0];
change_endianness = 1;
}
LOGL(3,
"dvbapi read from socket %d the following data (%d bytes), pos = %d, op %08X, key %d",
s->sock, s->rlen, pos, op, b[4]);
// LOGL(3, "dvbapi read from socket %d the following data (%d bytes), pos = %d, op %08X, key %d -> %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X", s->sock, s->rlen, pos, op, b[4], b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7], b[8], b[9], b[10]);
switch (op)
{
case DVBAPI_SERVER_INFO:
if (s->rlen < 6)
return 0;
dvbapi_copy16r(dvbapi_protocol_version, b, 4)
;
LOG("dvbapi: server version %d found, name = %s",
dvbapi_protocol_version, b + 7)
;
if (dvbapi_protocol_version > DVBAPI_PROTOCOL_VERSION)
dvbapi_protocol_version = DVBAPI_PROTOCOL_VERSION;
register_dvbapi();
dvbapi_is_enabled = 1;
pos = 6 + strlen(b + 6) + 1;
break;
case DVBAPI_DMX_SET_FILTER:
{
SKey *k;
if (change_endianness)
pos += 2; // for some reason the packet is longer with 2 bytes
pos += 65;
dvbapi_copy16r(_pid, b, 7);
_pid &= 0x1FFF;
k_id = b[4];
k = get_key(k_id);
a_id = -1;
if (k)
a_id = k->adapter;
adapter_lock(a_id);
demux = b[5];
filter = b[6];
LOG(
"dvbapi requested set filter for pid %04X (%d), key %d, demux %d, filter %d %s",
_pid, _pid, k_id, demux, filter,
!k ? "(KEY NOT VALID)" : "");
if (!(p = find_pid(a_id, _pid)))
{
mark_pid_add(-1, a_id, _pid);
update_pids(a_id);
p = find_pid(a_id, _pid);
}
if (!p)
{
adapter_unlock(a_id);
break;
}
// if(k && p->key != k_id)
if(k)
k->ecms ++;
if (p->key == 255)
{
p->filter = filter;
k->demux = demux;
p->type = TYPE_ECM;
p->key = k_id;
p->ecm_parity = 255;
invalidate_adapter(k->adapter);
}
// else p->ecm_parity = 255;
adapter_unlock(a_id);
break;
}
case DVBAPI_DMX_STOP:
{
k_id = b[4];
demux = b[5];
filter = b[6];
pos += 9;
k = get_key(k_id);
if (!k)
break;
a_id = k->adapter;
adapter_lock(a_id);
dvbapi_copy16r(_pid, b, 7)
_pid &= 0x1FFF;
LOG(
"dvbapi: received DMX_STOP for key %d, adapter %d, demux %d, filter %d, pid %X (%d)",
k_id, a_id, demux, filter, _pid, _pid);
if ((p = find_pid(a_id, _pid)) && (p->key == k_id))
{
if(p->type & TYPE_PMT)
p->type = TYPE_PMT;
else
p->type = 0;
p->key = p->filter = 255;
invalidate_adapter(k->adapter);
}
if(k)
{
k->ecms --;
k->last_dmx_stop = getTick();
} adapter_unlock(a_id);
break;
}
case DVBAPI_CA_SET_PID:
{
LOG("received DVBAPI_CA_SET_PID");
pos += 13;
break;
}
case DVBAPI_CA_SET_DESCR:
{
int index, parity, k_id;
SKey *k;
SPid *p;
unsigned char *cw;
int64_t ctime = getTick();
pos += 21;
k_id = b[4];
dvbapi_copy32r(index, b, 5);
dvbapi_copy32r(parity, b, 9);
cw = b + 13;
k = get_key(k_id);
if (k && (parity < 2))
{
char *queued = "";
int do_queue = 0;
adapter_lock(a_id);
mutex_lock(&k->mutex);
k->key_len = 8;
if (parity == k->parity && k->key_ok[k->parity]
&& (memcmp(cw, k->cw[k->parity], k->key_len) != 0))
do_queue = 1;
if (ctime - k->last_parity_change < 5000) // CW received in the first 5s after key change
do_queue = 0;
if (do_queue)
{
memcpy(k->next_cw[parity], cw, k->key_len);
queued = "[queued]";
}
else
{
k->op->set_cw(cw, k->key[parity]);
memcpy(k->cw[parity], cw, k->key_len);
}
k->key_ok[parity] = 1;
k->cw_time[parity] = ctime;
LOG(
"dvbapi: received DVBAPI_CA_SET_DESCR, key %d parity %d, index %d, CW: %02X %02X %02X %02X %02X %02X %02X %02X %s",
k_id, parity, index, cw[0], cw[1], cw[2], cw[3], cw[4],
cw[5], cw[6], cw[7], queued);
mutex_unlock(&k->mutex);
invalidate_adapter(k->adapter);
p = find_pid(k->adapter, k->pmt_pid);
if (p)
p->type |= CLEAN_PMT;
adapter_unlock(a_id);
}
else
LOG(
"dvbapi: invalid DVBAPI_CA_SET_DESCR, key %d parity %d, k %p, index %d, CW: %02X %02X %02X %02X %02X %02X %02X %02X",
k_id, parity, k, index, cw[0], cw[1], cw[2], cw[3],
cw[4], cw[5], cw[6], cw[7]);
break;
}
case DVBAPI_ECM_INFO:
{
int pos1 = s->rlen - pos;
int64_t z = 0;
SKey *k = get_key(b[4]);
char cardsystem[255];
char reader[255];
char from[255];
char protocol[255];
unsigned char len = 0;
char *msg[5] =
{ cardsystem, reader, from, protocol, NULL };
int i = 5, j = 0;
if (k)
{
int64_t e_key = DVBAPI_ITEM + ((1 + k->adapter) << 24) + 2;
setItem(e_key, b, 1, 0);
mutex_lock(&k->mutex);
k->ecm_info = getItem(e_key);
k->cardsystem = k->ecm_info;
k->reader = k->ecm_info + 256;
k->from = k->ecm_info + 512;
k->protocol = k->ecm_info + 768;
msg[0] = k->cardsystem;
msg[1] = k->reader;
msg[2] = k->from;
msg[3] = k->protocol;
}
uint16_t sid;
copy16r(sid, b, i);
if (k)
{
copy16r(k->caid, b, i + 2);
copy16r(k->info_pid, b, i + 4);
copy32r(k->prid, b, i + 6);
copy32r(k->ecmtime, b, i + 10);
}
i += 14;
while (msg[j] && i < pos1)
{
len = b[i++];
memcpy(msg[j], b + i, len);
msg[j][len] = 0;
i += len;
j++;
}
if (i < pos1 && k)
k->hops = b[i++];
if (k)
mutex_unlock(&k->mutex);
pos += i;
LOG(
"dvbapi: ECM_INFO: key %d, SID = %04X, CAID = %04X (%s), PID = %d (%04X), ProvID = %06X, ECM time = %d ms, reader = %s, from = %s, protocol = %s, hops = %d",
k ? k->id : -1, sid, k ? k->caid : 0, msg[0],
k ? k->info_pid : 0, k ? k->info_pid : 0, k ? k->prid : 0,
k ? k->ecmtime : -1, msg[1], msg[2], msg[3],
k ? k->hops : 0);
break;
}
case CA_SET_DESCR_MODE:
{
int k_id, algo, mode;
SKey *k;
pos += 17;
k_id = b[4];
dvbapi_copy32r(algo, b, 5);
dvbapi_copy32r(mode, b, 9);
LOG("Key %d, Algo set to %d, Mode set to %d", k_id, algo, mode);
k = get_key(k_id);
if(!k)
break;
set_algo(k, algo, mode);
break;
}
default:
{
LOG(
"dvbapi: unknown operation: %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X",
b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7], b[8], b[9],
b[10]);
pos = s->rlen;
}
}
}
s->rlen = 0;
return 0;
}
SKey *get_active_key(SPid *p)
{
SKey *k;
adapter *ad;
int key = p->key;
int counter = 0;
int64_t ctime = getTick();
uint8_t nullcw[16] =
{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
if (key == 255)
return NULL;
if (p->type & TYPE_ECM)
return POINTER_TYPE_ECM;
if (p->type & TYPE_PMT)
return NULL;
k = get_key(key);
if (k == NULL)
return NULL;
ad = get_adapter(k->adapter);
LOGL(3,
"get_active_key: searching key for pid %d, starting key %d parity %d ok %d %d",
p->pid, key, k->parity, k->key_ok[0], k->key_ok[1]);
while (k && k->enabled && (counter ++ < 10))
{
if ((k->parity != -1) && k->key_ok[k->parity]
&& (ctime - k->cw_time[k->parity] > MAX_KEY_TIME)) // key expired
{
k->key_ok[k->parity] = 0;
LOGL(2,
"get_active_key: Invalidating key %d, parity %d, as the CW expired, pid %d",
k->id, k->parity, p->pid);
}
if ((k->parity != -1) && (ctime - k->cw_time[k->parity] > 5000)
&& (memcmp(nullcw, k->next_cw[k->parity], k->key_len) != 0))
{
char *cw = k->next_cw[k->parity];
LOGL(2,
"get_active_key: Setting the queued CW as active CW for key %d, parity %d: %02X %02X %02X ...",
k->id, k->parity, cw[0], cw[1], cw[2]);
memcpy(k->cw[k->parity], k->next_cw[k->parity], k->key_len);
memset(k->next_cw[k->parity], 0, k->key_len);
k->op->set_cw(k->cw[k->parity], k->key[k->parity]);
}
if (((k->parity != -1) && k->key_ok[k->parity])
|| ((k->parity == -1) && (k->key_ok[0] || k->key_ok[1])))
{
char buf[200];
buf[0] = 0;
LOGL(1,
"get_active_key: returning key %d for pid %d, d/c errs %d/%d, adapter pid errs %d",
k->id, p->pid, p->dec_err, p->err, ad ? ad->pid_err : -1);
return k;
}
// if (k->next_key < keys || k->next_key > keys + MAX_KEYS)
// {
// LOGL(3, "get_active_key: invalid next_key for key %d: %p", k->id,
// k->next_key);
// k->next_key = NULL;
// }
k = k->next_key;
LOGL(3,
"get_active_key: trying next key for pid %d, key %d parity %d ok %d %d",
p->pid, k ? k->id : -1, k ? k->parity : -1,
k ? k->key_ok[0] : -1, k ? k->key_ok[1] : -1);
}
LOGL(1, "get_active_key: returning NULL for pid %d, starting key %d",
p->pid, key);
return NULL;
}
void set_next_key(int k1, int k2)
{
SKey *key1, *key2;
key1 = get_key(k1);
key2 = get_key(k2);
if (!key1 || !key2)
return;
LOG("Next key %d set to key %d", key1->id, key2->id);
key1->next_key = key2;
}
void update_pid_key(adapter *ad)
{
int i = 0;
int64_t pk_key = DVBAPI_ITEM + ((1 + ad->id) << 24) + 1;
SKey **pid_to_key = (SKey **) getItem(pk_key);
if (!pid_to_key || pid_to_key[0]) // cache pid_to_key
{
setItem(pk_key, (uint8_t *) &i, 0, -1);
setItemSize(pk_key, 8192 * sizeof(*pid_to_key));
pid_to_key = (SKey **) getItem(pk_key);
memset(pid_to_key, 0, getItemSize(pk_key));
for (i = 0; i < MAX_PIDS; i++)
if (ad->pids[i].flags == 1)
pid_to_key[ad->pids[i].pid] = get_active_key(&ad->pids[i]);
pid_to_key[0] = 0;
}
}
int decrypt_batch(SKey *k)
{
int oldb1 = -1, oldb2 = -1;
unsigned char *b = NULL, *oldb = NULL;
int bl, i, pid = 0;
if (!k)
LOG_AND_RETURN(-1, "Unable to decrypt k=NULL for key %d", k->id);
mutex_lock(&k->mutex);
if (k->blen <= 0 || (k->parity == -1) || (!k->key_ok[k->parity]))
{
LOG("Unable to decrypt blen = %d, parity = %d, key_ok %d for key %d",
k->blen, k->parity, (k->parity >= 0) ? k->key_ok[k->parity] : 0,
k->id);
mutex_unlock(&k->mutex);
return -1;
}
b = k->batch[0].data - 4;
pid = (b[1] & 0x1F) * 256 + b[2];
k->batch[k->blen].data = NULL;
k->batch[k->blen].len = 0;
k->op->decrypt_stream(k->key[k->parity], k->batch, 184);
LOGL(6,
"dvbapi: decrypted key %d parity %d at len %d, channel_id %d (pid %d) %p",
k->id, k->parity, k->blen, k->sid, pid, k->batch[0].data); //0x99
k->blen = 0;
memset(k->batch, 0, sizeof(int *) * 128);
mutex_unlock(&k->mutex);
return 0;
}
void mark_decryption_failed(unsigned char *b, SKey *k, adapter *ad)
{
SPid *p;
int pid;
if (!ad)
return;
pid = (b[1] & 0x1F) * 256 + b[2];
LOGL(5,
"NOT DECRYPTING for key %d drop_encrypted=%d parity %d pid %d key_ok %d",
k ? k->id : -1, opts.drop_encrypted, k ? k->parity : -1, pid,
k ? k->key_ok[k->parity] : -1);
ad->dec_err++;
p = find_pid(ad->id, pid);
if (p)
p->dec_err++;
if (opts.drop_encrypted)
{
b[1] |= 0x1F;
b[2] |= 0xFF;
}
}
int decrypt_stream(adapter *ad, void *arg)
{
struct iovec *iov;
SKey *k = NULL;
int adapt_len;
int len;
int batchSize = 0;
// max batch
int i = 0, j = 0;
unsigned char *b;
SPid *p;
int pid;
int cp;
SKey **pid_to_key;
int64_t pk_key = DVBAPI_ITEM + ((1 + ad->id) << 24) + 1;
int rlen = *(int *) arg;
if (!dvbapi_is_enabled)
return 0;
update_pid_key(ad);
pid_to_key = (SKey **) getItem(pk_key);
for (i = 0; i < rlen; i += 188)
{
b = ad->buf + i;
pid = (b[1] & 0x1F) * 256 + b[2];
if (b[3] & 0x80)
{
if (dvbapi_is_enabled && pid_to_key)
k = pid_to_key[pid];
else
k = NULL;
if (!k)
{
mark_decryption_failed(b, k, ad);
continue;
}
else if (k == POINTER_TYPE_ECM) // it is an ECM - we should get here
continue;
else if (k == POINTER_1)
continue;
cp = ((b[3] & 0x40) > 0);
if (k->parity == -1)
k->parity = cp;
if (!batchSize)
batchSize = k->op->batch_size();
if ((k->parity != cp) || (k->blen >= batchSize)) // partiy change or batch buffer full
{
int old_parity = k->parity;
decrypt_batch(k);
if (old_parity != cp)
{
int64_t ctime = getTick();
LOGL(2,
"Parity change for key %d, new active parity %d pid %d [%02X %02X %02X %02X], last_parity_change %jd",
k->id, cp, pid, b[0], b[1], b[2], b[3],
k->last_parity_change);
// if(ctime - k->last_parity_change> 1000)
// k->key_ok[old_parity] = 0;
k->last_parity_change = ctime;
k->parity = cp;
invalidate_adapter(ad->id);
update_pid_key(ad);
}
}
if (!k->key_ok[cp])
{
mark_decryption_failed(b, k, ad);
continue;
}
if (b[3] & 0x20)
{
adapt_len = (b[4] < 183) ? b[4] + 5 : 188;
LOGL(5, "Adaptation for pid %d, specified len %d, final len %d",
pid, b[4], adapt_len);
}
else
adapt_len = 4;
if (adapt_len < 188)
{
k->batch[k->blen].data = b + adapt_len;
k->batch[k->blen++].len = 188 - adapt_len;
}
b[3] &= 0x3F; // clear the encrypted flags
}
// else
// if (pid_to_key && pid_to_key[pid] == POINTER_TYPE_ECM)
// {
// send_ecm(b, ad);
// continue;
// }
}
for (i = 0; i < MAX_KEYS; i++) // decrypt everything that's left
if (keys[i] && keys[i]->enabled && (keys[i]->blen > 0)
&& (keys[i]->adapter == ad->id))
decrypt_batch(keys[i]);
}
int dvbapi_send_pmt(SKey *k)
{
unsigned char buf[1500];
int len;
LOG(
"Sending pmt to dvbapi server for pid %d, Channel ID %04X, key %d, using socket %d",
k->pmt_pid, k->sid, k->id, sock);
memset(buf, 0, sizeof(buf));
copy32(buf, 0, AOT_CA_PMT);
buf[6] = CAPMT_LIST_UPDATE;
// buf[6] = CAPMT_LIST_ONLY;
copy16(buf, 7, k->sid);
buf[9] = 1;
copy32(buf, 12, 0x01820200);
buf[15] = k->id;
buf[16] = k->id;
memcpy(buf + 17, k->pi, k->pi_len);
len = 17 - 6 + k->pi_len + 2;
copy16(buf, 4, len);
copy16(buf, 10, len - 11);
TEST_WRITE(write(sock, buf, len + 6));
return 0;
}
int dvbapi_close(sockets * s)
{
int i;
LOG("requested dvbapi close for sock %d, sock_id %d", sock, dvbapi_sock,
s->sock);
sock = 0;
dvbapi_is_enabled = 0;
SKey *k;
for (i = 0; i < MAX_KEYS; i++)
if (keys[i] && keys[i]->enabled)
{
k = get_key(i);
if (!k)
continue;
// reset_pids_type(k->adapter);
keys_del(i);
}
unregister_dvbapi();
return 0;
}
int dvbapi_timeout(sockets * s)
{
// if (!enabledKeys)return 1; // close dvbapi connection
return 0;
}
int connect_dvbapi(void *arg)
{
sockets *s = (sockets *) arg;
if ((sock > 0) && dvbapi_is_enabled) // already connected
{
int i;
uint64_t ctime = getTick();
for(i = 0; i< MAX_KEYS; i++)
if(keys[i] && keys[i]->enabled && (keys[i]->ecms == 0) && (keys[i]->last_dmx_stop > 0) && (ctime - keys[i]->last_dmx_stop > 3000))
{
LOG("Key %d active but no active filter, closing ", i);
keys_del(i);
}
return 0;
}
dvbapi_is_enabled = 0;
if (!opts.dvbapi_port || !opts.dvbapi_host)
return 0;
if (sock <= 0)
{
int err;
if(opts.dvbapi_host[0] == '/')
{
network_mode = 0;
sock = connect_local_socket(opts.dvbapi_host, 1);
}
else
sock = tcp_connect(opts.dvbapi_host, opts.dvbapi_port, NULL, 1);
if(sock < 0)
LOG_AND_RETURN(0, "%s: connect to %s failed", __FUNCTION__, opts.dvbapi_host);
dvbapi_sock = sockets_add(sock, NULL, -1, TYPE_TCP | TYPE_CONNECT,
(socket_action) dvbapi_reply, (socket_action) dvbapi_close,
(socket_action) dvbapi_timeout);
if(dvbapi_sock < 0)
LOG_AND_RETURN(0, "%s: socket_add failed", __FUNCTION__);
set_socket_buffer(dvbapi_sock, read_buffer, sizeof(read_buffer));
sockets_timeout(dvbapi_sock, 2000); // 2s timeout to close the socket
return 0;
}
return 0;
}
int poller_sock;
void init_dvbapi()
{
int sec = 1;
if (!ops[0])
{
LOG(
"%s: no algoritm registered, no point in connecting to the server (try installing libdvbcsa or openssl)",
__FUNCTION__);
return;
}
poller_sock = sockets_add(SOCK_TIMEOUT, NULL, -1, TYPE_UDP,
NULL, NULL, (socket_action) connect_dvbapi);
sockets_timeout(poller_sock, sec * 1000); // try to connect every 1s
set_sockets_rtime(poller_sock, -sec * 1000);
mutex_init(&keys_mutex);
}
void send_client_info(sockets *s)
{
unsigned char buf[1000];
unsigned char len;
memset(buf, 0, sizeof(buf));
copy32(buf, 0, DVBAPI_CLIENT_INFO);
copy16(buf, 4, dvbapi_protocol_version)
len = sprintf(buf + 7, "%s/%s", app_name, version);
buf[6] = len;
dvbapi_is_enabled = 1;
TEST_WRITE(write(s->sock, buf, len + 7));
}
int send_ecm(adapter *ad, void *arg)
{
unsigned char buf[1500];
unsigned char *b = (unsigned char *) arg;
SPid *p;
SKey *k = NULL;
int pid, len = 0;
int filter, demux;
int old_parity;
if (!dvbapi_is_enabled)
return 0;
if (b[0] != 0x47)
return 0;
pid = (b[1] & 0x1F) * 256 + b[2];
if ((pid != 0) && (pid != 1) && ((b[1] & 0x40) && ((b[5] & 0x80) != 0x80)))
return 0;
p = find_pid(ad->id, pid);
if (p)
k = get_key(p->key);
if (!k)
// LOG_AND_RETURN(0, "key is null pid %d for p->key %d", pid, p?p->key:-1);
return 0;
demux = k->demux;
filter = p->filter;
if (!(len = assemble_packet(&b, ad, 0)))
return 0;
if ((getTick() - k->last_ecm > 1000) && !k->key_ok[0] && !k->key_ok[1])
p->ecm_parity = -1;
if ((pid != 0) && (pid != 1) && (b[0] & 1) == p->ecm_parity)
return 0;
old_parity = p->ecm_parity;
p->ecm_parity = b[0] & 1;
len = ((b[1] & 0xF) << 8) + b[2];
len += 3;
k->last_ecm = getTick();
LOG(
"dvbapi: sending ECM key %d for pid %04X (%d), current ecm_parity = %d, next parity = %d, demux = %d, filter = %d, len = %d [%02X %02X %02X %02X]",
k->id, pid, pid, old_parity, p->ecm_parity, demux, filter, len, b[0],
b[1], b[2], b[3]);
if (demux < 0)
return 0;
if (len > 559 + 3)
return -1;
copy32(buf, 0, DVBAPI_FILTER_DATA);
buf[4] = demux;
buf[5] = filter;
// filter id
memcpy(buf + 6, b, len + 6);
TEST_WRITE(write(sock, buf, len + 6));
}
void create_cw_keys(SKey *k)
{
if (!k->key[0])
k->key[0] = k->op->create_cwkey();
if (!k->key[1])
k->key[1] = k->op->create_cwkey();
}
void delete_cw_keys(SKey *k)
{
if (!k->key[0])
k->op->delete_cwkey(k->key[0]);
if (!k->key[1])
k->op->delete_cwkey(k->key[1]);
k->key[0] = k->key[1] = NULL;
}
int set_algo(SKey *k, int algo, int mode)
{
int i;
dvbapi_op *op = NULL;
if (k->op->algo == algo && k->op->mode == mode)
return 1;
for (i = 0; ops[i]; i++)
if (ops[i]->algo == algo && ops[i]->mode == mode)
op = ops[i];
if (!op)
{
LOG("%s: key %d: no matching algorithm found for algo %d and mode %d",
__FUNCTION__, k->id, algo, mode);
return 2;
}
mutex_lock(&k->mutex);
delete_cw_keys(k);
k->op = op;
create_cw_keys(k);
k->op->set_cw(k->cw[0], k->key[0]);
k->op->set_cw(k->cw[1], k->key[1]);
mutex_unlock(&k->mutex);
return 0;
}
int keys_add(int i, int adapter, int sid, int pmt_pid)
{
SKey *k;
if( i == -1)
i = add_new_lock((void **) keys, MAX_KEYS, sizeof(SKey), &keys_mutex);
else
{
if(keys[i])
mutex_lock(&keys[i]->mutex);
else
{
keys[i] = malloc(sizeof(SKey));
if(!keys[i])
LOG_AND_RETURN(-1, "Could not allocate memory for the key %d", i);
memset(keys[i], 0, sizeof(SKey));
mutex_init(&keys[i]->mutex);
mutex_lock(&keys[i]->mutex);
}
}
if (i == -1 || !keys[i])
{
LOG_AND_RETURN(-1, "Key buffer is full, could not add new keys");
}
k = keys[i];
k->op = ops[0];
create_cw_keys(k);
if (!k->key[0] || !k->key[1])
{
mutex_unlock(&k->mutex);
LOG_AND_RETURN(-1, "Count not allocate dvbcsa key, keys_add failed");
}
k->parity = -1;
k->key_ok[0] = k->key_ok[1] = 0;
k->sid = sid;
k->pmt_pid = pmt_pid;
k->adapter = adapter;
k->demux = -1;
k->id = i;
k->blen = 0;
k->enabled = 1;
k->ver = -1;
k->next_key = NULL;
k->ecm_info = k->cardsystem = k->reader = k->from = k->protocol = NULL;
k->cw_time[0] = k->cw_time[1] = 0;
k->key_len = 8;
k->ecms = 0;
k->last_dmx_stop = 0;
memset(k->cw[0], 0, 16);
memset(k->cw[1], 0, 16);
memset(k->next_cw[0], 0, 16);
memset(k->next_cw[1], 0, 16);
mutex_unlock(&k->mutex);
invalidate_adapter(adapter);
enabledKeys++;
LOG("returning new key %d for adapter %d, pmt pid %d sid %04X", i, adapter,
pmt_pid, sid);
return i;
}
int keys_del(int i)
{
int aid, j, ek;
SKey *k;
unsigned char buf[8] =
{ 0x9F, 0x80, 0x3f, 4, 0x83, 2, 0, 0 };
k = get_key(i);
if (!k)
return 0;
mutex_lock(&k->mutex);
if (!k->enabled)
{
mutex_unlock(&k->mutex);
return 0;
}
aid = k->adapter;
k->enabled = 0;
// buf[7] = k->demux;
buf[7] = i;