module-dvbapi-azbox.c

#define MODULE_LOG_PREFIX "dvbazbox"

#include "globals.h"

#if defined(HAVE_DVBAPI) && defined(WITH_AZBOX)

#include "extapi/openxcas/openxcas_api.h"
#include "extapi/openxcas/openxcas_message.h"

#include "module-dvbapi.h"
#include "module-dvbapi-azbox.h"
#include "oscam-client.h"
#include "oscam-ecm.h"
#include "oscam-reader.h"
#include "oscam-string.h"
#include "oscam-time.h"

// These variables are declared in module-dvbapi.c
extern void *dvbapi_client;
extern DEMUXTYPE demux[MAX_DEMUX];

// These are used in module-dvbapi.c
int32_t openxcas_provid;
uint16_t openxcas_sid, openxcas_caid, openxcas_ecm_pid;

static uint8_t openxcas_cw[16];
static int32_t openxcas_seq, openxcas_filter_idx, openxcas_stream_id, openxcas_cipher_idx, openxcas_busy = 0;
static uint16_t openxcas_video_pid, openxcas_audio_pid, openxcas_data_pid;

static void azbox_openxcas_ecm_callback(int32_t stream_id, uint32_t UNUSED(seq), int32_t cipher_index, uint32_t UNUSED(caid), uint8_t *ecm_data, int32_t l, uint16_t pid)
{
	cs_log_dbg(D_DVBAPI, "ecm callback received");

	openxcas_stream_id = stream_id;
	//openxcas_seq = seq;
	//openxcas_caid = caid;
	openxcas_ecm_pid = pid;
	openxcas_busy = 1;

	if(l < 0 || l > MAX_ECM_SIZE)
		{ return; }

	ECM_REQUEST *er;
	if(!(er = get_ecmtask()))
		{ return; }

	er->srvid = openxcas_sid;
	er->caid  = openxcas_caid;
	er->pid   = openxcas_ecm_pid;
	er->prid  = openxcas_provid;

	er->ecmlen = l;
	memcpy(er->ecm, ecm_data, er->ecmlen);

	request_cw(dvbapi_client, er, 0, 0);

	//openxcas_stop_filter(openxcas_stream_id, OPENXCAS_FILTER_ECM);
	//openxcas_remove_filter(openxcas_stream_id, OPENXCAS_FILTER_ECM);

	openxcas_cipher_idx = cipher_index;

	struct timeb tp;
	cs_ftime(&tp);
	tp.time += 500;
}


static void azbox_openxcas_ex_callback(int32_t stream_id, uint32_t seq, int32_t idx, uint32_t pid, uint8_t *ecm_data, int32_t l)
{
	cs_log_dbg(D_DVBAPI, "ex callback received");

	openxcas_stream_id = stream_id;
	openxcas_ecm_pid = pid;
	openxcas_cipher_idx = idx; // is this really cipher_idx?

	if(l < 0 || l > MAX_ECM_SIZE)
		{ return; }

	ECM_REQUEST *er;
	if(!(er = get_ecmtask()))
		{ return; }

	er->srvid = openxcas_sid;
	er->caid  = openxcas_caid;
	er->pid   = openxcas_ecm_pid;
	er->prid  = openxcas_provid;

	er->ecmlen = l;
	memcpy(er->ecm, ecm_data, er->ecmlen);

	request_cw(dvbapi_client, er, 0, 0);

	if(openxcas_stop_filter_ex(stream_id, seq, openxcas_filter_idx) < 0)
		{ cs_log("unable to stop ex filter"); }
	else
		{ cs_log_dbg(D_DVBAPI, "ex filter stopped"); }



	uint8_t mask[12];
	uint8_t comp[12];
	memset(&mask, 0x00, sizeof(mask));
	memset(&comp, 0x00, sizeof(comp));

	mask[0] = 0xff;
	comp[0] = ecm_data[0] ^ 1;

	if((openxcas_filter_idx = openxcas_start_filter_ex(stream_id, seq, openxcas_ecm_pid, mask, comp, (void *)azbox_openxcas_ex_callback)) < 0)
		{ cs_log("unable to start ex filter"); }
	else
		{ cs_log_dbg(D_DVBAPI, "ex filter started, pid = %x", openxcas_ecm_pid); }
}

static void *azbox_main_thread(void *cli)
{
	struct s_client *client = (struct s_client *) cli;
	client->thread = pthread_self();
	SAFE_SETSPECIFIC(getclient, cli);
	dvbapi_client = cli;

	struct s_auth *account;
	int32_t ok = 0;
	for(account = cfg.account; account; account = account->next)
	{
		if((ok = is_dvbapi_usr(account->usr)))
			{ break; }
	}
	cs_auth_client(client, ok ? account : (struct s_auth *)(-1), "dvbapi");

	dvbapi_read_priority();

	openxcas_msg_t msg;
	int32_t ret;
	while((ret = openxcas_get_message(&msg, 0)) >= 0)
	{
		cs_sleepms(10);

		if(ret)
		{
			openxcas_stream_id = msg.stream_id;
			openxcas_seq = msg.sequence;
			struct stOpenXCAS_Data data;

			switch(msg.cmd)
			{
			case OPENXCAS_SELECT_CHANNEL:
				cs_log_dbg(D_DVBAPI, "OPENXCAS_SELECT_CHANNEL");

				// parse channel info
				struct stOpenXCASChannel chan;
				memcpy(&chan, msg.buf, msg.buf_len);

				cs_log("channel change: sid = %x, vpid = %x. apid = %x", chan.service_id, chan.v_pid, chan.a_pid);

				openxcas_video_pid = chan.v_pid;
				openxcas_audio_pid = chan.a_pid;
				openxcas_data_pid = chan.d_pid;
				break;
			case OPENXCAS_START_PMT_ECM:
				cs_log_dbg(D_DVBAPI, "OPENXCAS_START_PMT_ECM");

				// parse pmt
				uint8_t *dest;
				if(!cs_malloc(&dest, msg.buf_len + 7 - 12 - 4))
					{ break; }

				memcpy(dest, "\x03\xFF\xFF\x00\x00\x13\x00", 7);

				dest[1] = msg.buf[3];
				dest[2] = msg.buf[4];
				dest[5] = msg.buf[11] + 1;

				memcpy(dest + 7, msg.buf + 12, msg.buf_len - 12 - 4);

				dvbapi_parse_capmt(dest, 7 + msg.buf_len - 12 - 4, -1, NULL, 0, 0);
				NULLFREE(dest);

				uint8_t mask[12];
				uint8_t comp[12];
				memset(&mask, 0x00, sizeof(mask));
				memset(&comp, 0x00, sizeof(comp));

				mask[0] = 0xfe;
				comp[0] = 0x80;

				if((ret = openxcas_add_filter(msg.stream_id, OPENXCAS_FILTER_ECM, 0, 0xffff, openxcas_ecm_pid, mask, comp, (void *)azbox_openxcas_ecm_callback)) < 0)
					{ cs_log("unable to add ecm filter"); }
				else
					{ cs_log_dbg(D_DVBAPI, "ecm filter added, pid = %x, caid = %x", openxcas_ecm_pid, 0); }

				if(openxcas_start_filter(msg.stream_id, msg.sequence, OPENXCAS_FILTER_ECM) < 0)
					{ cs_log("unable to start ecm filter"); }
				else
					{ cs_log_dbg(D_DVBAPI, "ecm filter started"); }

				if(!openxcas_create_cipher_ex(msg.stream_id, openxcas_seq, 0, openxcas_ecm_pid, openxcas_video_pid, 0xffff, openxcas_audio_pid, 0xffff, 0xffff, 0xffff))
					{ cs_log("failed to create cipher ex"); }
				else
					{ cs_log_dbg(D_DVBAPI, "cipher created"); }
				break;
			case OPENXCAS_STOP_PMT_ECM:
				cs_log_dbg(D_DVBAPI, "OPENXCAS_STOP_PMT_ECM");
				openxcas_stop_filter(msg.stream_id, OPENXCAS_FILTER_ECM);
				openxcas_remove_filter(msg.stream_id, OPENXCAS_FILTER_ECM);
				openxcas_stop_filter_ex(msg.stream_id, msg.sequence, openxcas_filter_idx);
				openxcas_destory_cipher_ex(msg.stream_id, msg.sequence);
				memset(&demux, 0, sizeof(demux));
				break;
			case OPENXCAS_ECM_CALLBACK:
				cs_log_dbg(D_DVBAPI, "OPENXCAS_ECM_CALLBACK");
				memcpy(&data, msg.buf, msg.buf_len);
				if(!openxcas_busy)
					{ openxcas_filter_callback(msg.stream_id, msg.sequence, OPENXCAS_FILTER_ECM, &data); }
				break;
			case OPENXCAS_PID_FILTER_CALLBACK:
				cs_log_dbg(D_DVBAPI, "OPENXCAS_PID_FILTER_CALLBACK");
				memcpy(&data, msg.buf, msg.buf_len);
				openxcas_filter_callback_ex(msg.stream_id, msg.sequence, &data);
				break;
			case OPENXCAS_QUIT:
				cs_log_dbg(D_DVBAPI, "OPENXCAS_QUIT");
				openxcas_close();
				cs_log("exited");
				return NULL;
				break;
			case OPENXCAS_UKNOWN_MSG:
			default:
				cs_log_dbg(D_DVBAPI, "OPENXCAS_UKNOWN_MSG (%d)", msg.cmd);
				//cs_log_dump_dbg(D_DVBAPI, &msg, sizeof(msg), "msg dump:");
				break;
			}
		}
	}
	cs_log("invalid message");
	return NULL;
}

void azbox_send_dcw(struct s_client *client, ECM_REQUEST *er)
{
	struct s_dvbapi_priority *delayentry = dvbapi_check_prio_match(0, demux[0].pidindex, 'd');
	uint32_t delay = 0;

	cs_log_dbg(D_DVBAPI, "send_dcw");

	if(delayentry)
	{
		if(delayentry->delay < 1000)
		{
			delay = delayentry->delay;
			cs_log_dbg(D_DVBAPI, "specific delay: write cw %d ms after ecmrequest", delay);
		}
	}
	else if (cfg.dvbapi_delayer > 0)
	{
		delay = cfg.dvbapi_delayer;
		cs_log_dbg(D_DVBAPI, "generic delay: write cw %d ms after ecmrequest", delay);
	}

	delayer(er, delay);

	if(cfg.dvbapi_ecminfo_file != 0)
	{
		dvbapi_write_ecminfo_file(client, er, demux[0].last_cw[0][0], demux[0].last_cw[0][1], 8);
	}

	openxcas_busy = 0;

	int32_t i;
	for(i = 0; i < MAX_DEMUX; i++)
	{
		if(er->rc >= E_NOTFOUND)
		{
			cs_log_dbg(D_DVBAPI, "cw not found");

			if(demux[i].pidindex == -1)
				{ dvbapi_try_next_caid(i, 0, 0); }

			openxcas_stop_filter(openxcas_stream_id, OPENXCAS_FILTER_ECM);
			openxcas_remove_filter(openxcas_stream_id, OPENXCAS_FILTER_ECM);

			uint8_t mask[12];
			uint8_t comp[12];
			memset(&mask, 0x00, sizeof(mask));
			memset(&comp, 0x00, sizeof(comp));

			mask[0] = 0xfe;
			comp[0] = 0x80;

			if(openxcas_add_filter(openxcas_stream_id, OPENXCAS_FILTER_ECM, 0, 0xffff, openxcas_ecm_pid, mask, comp, (void *)azbox_openxcas_ecm_callback) < 0)
			{
				cs_log("unable to add ecm filter (0)");
				if(openxcas_add_filter(openxcas_stream_id, OPENXCAS_FILTER_ECM, openxcas_caid, 0xffff, openxcas_ecm_pid, mask, comp, (void *)azbox_openxcas_ecm_callback) < 0)
					{ cs_log("unable to add ecm filter (%04x)", openxcas_caid); }
				else
					{ cs_log_dbg(D_DVBAPI, "ecm filter added, pid = %x, caid = %x", openxcas_ecm_pid, openxcas_caid); }
			}
			else
				{ cs_log_dbg(D_DVBAPI, "ecm filter added, pid = %x, caid = %x", openxcas_ecm_pid, 0); }

			if(openxcas_start_filter(openxcas_stream_id, openxcas_seq, OPENXCAS_FILTER_ECM) < 0)
				{ cs_log("unable to start ecm filter"); }
			else
				{ cs_log_dbg(D_DVBAPI, "ecm filter started"); }

			return;
		}
	}

	uint8_t nullcw[8];
	memset(nullcw, 0, 8);

	int32_t n;
	for(n = 0; n < 2; n++)
	{
		// Skip check for BISS1 - cw could be indeed zero
		// Skip check for BISS2 - we use the extended cw, so the "simple" cw is always zero
		if(memcmp(er->cw + (n * 8), demux[0].last_cw[0][n], 8) && (memcmp(er->cw + (n * 8), nullcw, 8) != 0 || caid_is_biss(er->caid)))
		{
			memcpy(demux[0].last_cw[0][n], er->cw + (n * 8), 8);
			memcpy(openxcas_cw + (n * 8), er->cw + (n * 8), 8);
		}
	}

	if(openxcas_set_key(openxcas_stream_id, openxcas_seq, 0, openxcas_cipher_idx, openxcas_cw, openxcas_cw + 8) != 1)
		{ cs_log("set cw failed"); }
	else
		{ cs_log_dump_dbg(D_DVBAPI, openxcas_cw, 16, "write cws to descrambler"); }
}

#ifdef WITH_CARDREADER
#define __openxcas_open openxcas_open_with_smartcard
#else
#define __openxcas_open openxcas_open
#endif

void azbox_init(void)
{
	openxcas_debug_message_onoff(1);  // debug
	if(__openxcas_open("oscamCAS") < 0)
		{ cs_log("could not init"); }
}

void azbox_close(void)
{
	if(openxcas_close() < 0)
		{ cs_log("could not close"); }
}

void *azbox_handler(struct s_client *cl, uint8_t *mbuf, int32_t module_idx)
{
	return dvbapi_start_handler(cl, mbuf, module_idx, azbox_main_thread);
}

#endif