[PR-175] capmt: add support for on-demand sockets per service id
This commit fixes simultaneous channel decryption in capmt oscam mode. Initial channel PMT data and PMT updates are sent to oscam via different capmt socket connections (a socket is created per channel SID). OScam is stopping decrypting when the socket is closed. More details in this thread: http://www.streamboard.tv/wbb2/thread.php?threadid=33323 Thanks to @posixx for days of testing :)
This commit is contained in:
Mariusz Bialonczyk
Adam Sutton
parent
3de3fe191a
commit
7943c8b684
1 changed files with 138 additions and 36 deletions
174
src/capmt.c
174
src/capmt.c
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@ -77,6 +77,7 @@
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#define INFO_SIZE (2+KEY_SIZE+KEY_SIZE)
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#define EVEN_OFF (2)
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#define ODD_OFF (2+KEY_SIZE)
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#define MAX_SOCKETS 16 // max sockets (simultaneous channels) per demux
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static unsigned char ca_info[MAX_CA][MAX_INDEX][INFO_SIZE];
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/**
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@ -189,7 +190,8 @@ typedef struct capmt {
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int capmt_oscam;
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/* capmt sockets */
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int capmt_sock;
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int sids[MAX_SOCKETS];
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int capmt_sock[MAX_SOCKETS];
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int capmt_sock_ca0[MAX_CA];
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/* thread flags */
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@ -206,43 +208,128 @@ typedef struct capmt {
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*
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*/
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static int
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capmt_send_msg(capmt_t *capmt, const uint8_t *buf, size_t len)
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capmt_send_msg(capmt_t *capmt, int sid, const uint8_t *buf, size_t len)
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{
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return write(capmt->capmt_sock, buf, len);
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if (capmt->capmt_oscam) {
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int i, sent = 0;
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// dumping current SID table
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for (i = 0; i < MAX_SOCKETS; i++)
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tvhlog(LOG_DEBUG, "capmt", "%s: SOCKETS TABLE DUMP [%d]: sid=%d socket=%d", __FUNCTION__, i, capmt->sids[i], capmt->capmt_sock[i]);
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if (sid == 0) {
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tvhlog(LOG_DEBUG, "capmt", "%s: got empty SID - returning from function", __FUNCTION__);
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return -1;
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}
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// searching for the SID and socket
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int found = 0;
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for (i = 0; i < MAX_SOCKETS; i++) {
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if (capmt->sids[i] == sid) {
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found = 1;
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break;
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}
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}
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if (found)
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tvhlog(LOG_DEBUG, "capmt", "%s: found sid, reusing socket, i=%d", __FUNCTION__, i);
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else { //not found - adding to first free in table
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for (i = 0; i < MAX_SOCKETS; i++) {
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if (capmt->sids[i] == 0) {
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capmt->sids[i] = sid;
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break;
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}
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}
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}
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if (i == MAX_SOCKETS) {
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tvhlog(LOG_DEBUG, "capmt", "%s: no free space for new SID!!!", __FUNCTION__);
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return -1;
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} else {
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capmt->sids[i] = sid;
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tvhlog(LOG_DEBUG, "capmt", "%s: added: i=%d", __FUNCTION__, i);
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}
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// opening socket and sending
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if (capmt->capmt_sock[i] == 0) {
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capmt->capmt_sock[i] = tvh_socket(AF_LOCAL, SOCK_STREAM, 0);
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struct sockaddr_un serv_addr_un;
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memset(&serv_addr_un, 0, sizeof(serv_addr_un));
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serv_addr_un.sun_family = AF_LOCAL;
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snprintf(serv_addr_un.sun_path, sizeof(serv_addr_un.sun_path), "%s", capmt->capmt_sockfile);
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if (connect(capmt->capmt_sock[i], (const struct sockaddr*)&serv_addr_un, sizeof(serv_addr_un)) != 0) {
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tvhlog(LOG_ERR, "capmt", "Cannot connect to %s, Do you have OSCam running?", capmt->capmt_sockfile);
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capmt->capmt_sock[i] = 0;
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} else
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tvhlog(LOG_DEBUG, "capmt", "created socket with socket_fd=%d", capmt->capmt_sock[i]);
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}
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if (capmt->capmt_sock[i] > 0) {
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sent = write(capmt->capmt_sock[i], buf, len);
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tvhlog(LOG_DEBUG, "capmt", "socket_fd=%d len=%d sent=%d", capmt->capmt_sock[i], (int)len, sent);
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if (sent != len) {
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tvhlog(LOG_ERR, "capmt", "%s: len != sent", __FUNCTION__);
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close(capmt->capmt_sock[i]);
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capmt->capmt_sock[i] = 0;
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}
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}
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return sent;
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}
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else // standard old capmt mode
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return write(capmt->capmt_sock[0], buf, len);
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}
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static void
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capmt_send_stop(capmt_service_t *t)
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{
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/* buffer for capmt */
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int pos = 0;
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uint8_t buf[4094];
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if (t->ct_capmt->capmt_oscam) {
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int i;
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// searching for socket to close
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for (i = 0; i < MAX_SOCKETS; i++)
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if (t->ct_capmt->sids[i] == t->ct_service->s_dvb_service_id)
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break;
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capmt_header_t head = {
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.capmt_indicator = { 0x9F, 0x80, 0x32, 0x82, 0x00, 0x00 },
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.capmt_list_management = CAPMT_LIST_ONLY,
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.program_number = t->ct_service->s_dvb_service_id,
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.version_number = 0,
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.current_next_indicator = 0,
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.program_info_length = 0,
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.capmt_cmd_id = CAPMT_CMD_NOT_SELECTED,
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};
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memcpy(&buf[pos], &head, sizeof(head));
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pos += sizeof(head);
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if (i == MAX_SOCKETS) {
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tvhlog(LOG_DEBUG, "capmt", "%s: socket to close not found", __FUNCTION__);
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return;
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}
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uint8_t end[] = {
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0x01, (t->ct_seq >> 8) & 0xFF, t->ct_seq & 0xFF, 0x00, 0x06 };
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memcpy(&buf[pos], end, sizeof(end));
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pos += sizeof(end);
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buf[4] = ((pos - 6) >> 8);
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buf[5] = ((pos - 6) & 0xFF);
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buf[7] = t->ct_service->s_dvb_service_id >> 8;
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buf[8] = t->ct_service->s_dvb_service_id & 0xFF;
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buf[9] = 1;
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buf[10] = ((pos - 5 - 12) & 0xF00) >> 8;
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buf[11] = ((pos - 5 - 12) & 0xFF);
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// closing socket (oscam handle this as event and stop decrypting)
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tvhlog(LOG_DEBUG, "capmt", "%s: closing socket i=%d, socket_fd=%d", __FUNCTION__, i, t->ct_capmt->capmt_sock[i]);
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t->ct_capmt->sids[i] = 0;
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if (t->ct_capmt->capmt_sock[i] > 0)
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close(t->ct_capmt->capmt_sock[i]);
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t->ct_capmt->capmt_sock[i] = 0;
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} else { // standard old capmt mode
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/* buffer for capmt */
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int pos = 0;
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uint8_t buf[4094];
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capmt_header_t head = {
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.capmt_indicator = { 0x9F, 0x80, 0x32, 0x82, 0x00, 0x00 },
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.capmt_list_management = CAPMT_LIST_ONLY,
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.program_number = t->ct_service->s_dvb_service_id,
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.version_number = 0,
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.current_next_indicator = 0,
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.program_info_length = 0,
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.capmt_cmd_id = CAPMT_CMD_NOT_SELECTED,
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};
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memcpy(&buf[pos], &head, sizeof(head));
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pos += sizeof(head);
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uint8_t end[] = {
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0x01, (t->ct_seq >> 8) & 0xFF, t->ct_seq & 0xFF, 0x00, 0x06 };
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memcpy(&buf[pos], end, sizeof(end));
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pos += sizeof(end);
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buf[4] = ((pos - 6) >> 8);
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buf[5] = ((pos - 6) & 0xFF);
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buf[7] = t->ct_service->s_dvb_service_id >> 8;
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buf[8] = t->ct_service->s_dvb_service_id & 0xFF;
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buf[9] = 1;
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buf[10] = ((pos - 5 - 12) & 0xF00) >> 8;
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buf[11] = ((pos - 5 - 12) & 0xFF);
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capmt_send_msg(t->ct_capmt, buf, pos);
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capmt_send_msg(t->ct_capmt, t->ct_service->s_dvb_service_id, buf, pos);
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}
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}
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/**
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@ -457,9 +544,12 @@ capmt_thread(void *aux)
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th_dvb_adapter_t *tda;
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while (capmt->capmt_running) {
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capmt->capmt_sock = -1;
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for (i = 0; i < MAX_CA; i++)
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capmt->capmt_sock_ca0[i] = -1;
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for (i = 0; i < MAX_SOCKETS; i++) {
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capmt->sids[i] = 0;
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capmt->capmt_sock[i] = 0;
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}
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capmt->capmt_connected = 0;
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pthread_mutex_lock(&global_lock);
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@ -470,14 +560,14 @@ capmt_thread(void *aux)
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pthread_mutex_unlock(&global_lock);
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/* open connection to camd.socket */
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capmt->capmt_sock = tvh_socket(AF_LOCAL, SOCK_STREAM, 0);
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capmt->capmt_sock[0] = tvh_socket(AF_LOCAL, SOCK_STREAM, 0);
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struct sockaddr_un serv_addr_un;
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memset(&serv_addr_un, 0, sizeof(serv_addr_un));
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serv_addr_un.sun_family = AF_LOCAL;
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snprintf(serv_addr_un.sun_path, sizeof(serv_addr_un.sun_path), "%s", capmt->capmt_sockfile);
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if (connect(capmt->capmt_sock, (const struct sockaddr*)&serv_addr_un, sizeof(serv_addr_un)) == 0) {
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if (connect(capmt->capmt_sock[0], (const struct sockaddr*)&serv_addr_un, sizeof(serv_addr_un)) == 0) {
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capmt->capmt_connected = 1;
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/* open connection to emulated ca0 device */
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@ -503,8 +593,9 @@ capmt_thread(void *aux)
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capmt->capmt_connected = 0;
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/* close opened sockets */
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if (capmt->capmt_sock > 0)
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close(capmt->capmt_sock);
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for (i = 0; i < MAX_SOCKETS; i++)
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if (capmt->capmt_sock[i] > 0)
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close(capmt->capmt_sock[i]);
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for (i = 0; i < MAX_CA; i++)
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if (capmt->capmt_sock_ca0[i] > 0)
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close(capmt->capmt_sock_ca0[i]);
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@ -540,6 +631,7 @@ capmt_table_input(struct th_descrambler *td, struct service *t,
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capmt_t *capmt = ct->ct_capmt;
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int adapter_num = t->s_dvb_mux_instance->tdmi_adapter->tda_adapter_num;
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int total_caids = 0, current_caid = 0;
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int i;
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caid_t *c;
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@ -587,7 +679,7 @@ capmt_table_input(struct th_descrambler *td, struct service *t,
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if ((cce->cce_ecmsize == len) && !memcmp(cce->cce_ecm, data, len))
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break; /* key already sent */
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if(capmt->capmt_sock == -1) {
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if(!capmt->capmt_oscam && capmt->capmt_sock[0] == 0) {
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/* New key, but we are not connected (anymore), can not descramble */
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ct->ct_keystate = CT_UNKNOWN;
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break;
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@ -718,7 +810,17 @@ capmt_table_input(struct th_descrambler *td, struct service *t,
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buf[9] = pmtversion;
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pmtversion = (pmtversion + 1) & 0x1F;
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capmt_send_msg(capmt, buf, pos);
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int found = 0;
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if (capmt->capmt_oscam) {
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for (i = 0; i < MAX_SOCKETS; i++) {
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if (capmt->sids[i] == sid) {
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found = 1;
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break;
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}
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}
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}
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if ((capmt->capmt_oscam && !found) || !capmt->capmt_oscam)
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capmt_send_msg(capmt, sid, buf, pos);
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break;
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}
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default:
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