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|
/*
* (c) BayCom GmbH, http://www.baycom.de, info@baycom.de
*
* See the COPYING file for copyright information and
* how to reach the author.
*
*/
//#define TESTING
#ifdef TESTING
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <netinet/in.h>
#include <stdlib.h>
#include "ciparser.h"
static unsigned char ll[] = { 0x00, 0x01, 0xA0, 0x28, 0x01, 0x90, 0x02, 0x00, 0x05, 0x9F, 0x80, 0x32, 0x1F, 0x03, 0x32, 0xC9, 0x01, 0x00, 0x0F, 0x01, 0x09, 0x06, 0x17, 0x62, 0xE0, 0x65, 0x00, 0x09, 0x09, 0x04, 0x17, 0x02, 0xE1, 0x2D, 0x02, 0x00, 0xA0, 0x00, 0x00, 0x04, 0x00, 0xA1, 0x00, 0x00 };
static unsigned char lr[] = { 0x00, 0x01, 0x80, 0x02, 0x01, 0x80 };
static unsigned char la[] = { 0x00, 0x01, 0xA0, 0x07, 0x01, 0x91, 0x04, 0x00, 0x01, 0x00, 0x41, 0x80, 0x02, 0x01, 0x00 };
static unsigned char lb[] = { 0x00, 0x01, 0xA0, 0x82, 0x00, 0x17, 0x01, 0x90, 0x02, 0x00, 0x03, 0x9F, 0x80, 0x31, 0x0E, 0x06, 0x02, 0x06, 0x02, 0x17, 0x02, 0x17, 0x62, 0x01, 0x00, 0x05, 0x00, 0x18, 0x00, 0x80, 0x02, 0x01, 0x00 };
static unsigned char lc[] = { 0x01, 0x02, 0xA0, 0x5F, 0x02, 0x90, 0x02, 0x00, 0x06, 0x9F, 0x80, 0x32, 0x56, 0x03, 0x03, 0x8B, 0x01, 0x00, 0x00, 0x02, 0x00, 0xA3, 0x00, 0x23, 0x01, 0x09, 0x0F, 0x05, 0x00, 0xE2, 0xC3, 0x10, 0x01, 0x00, 0x13, 0x01, 0x20, 0x14, 0x03, 0x00, 0x94, 0x0D, 0x09, 0x0F, 0x05, 0x00, 0xE2, 0xCD, 0x10, 0x01, 0x00, 0x13, 0x01, 0x20, 0x14, 0x03, 0x02, 0x38, 0x08, 0x04, 0x00, 0x5C, 0x00, 0x23, 0x01, 0x09, 0x0F, 0x05, 0x00, 0xE2, 0xC3, 0x10, 0x01, 0x00, 0x13, 0x01, 0x20, 0x14, 0x03, 0x00, 0x94, 0x0D, 0x09, 0x0F, 0x05, 0x00, 0xE2, 0xCD, 0x10, 0x01, 0x00, 0x13, 0x01, 0x20, 0x14, 0x03, 0x02, 0x38, 0x08 };
static unsigned char ld[] = { 0x00, 0x01, 0xA0, 0x82, 0x00, 0x10, 0x01, 0x90, 0x02, 0x00, 0x03, 0x9F, 0x80, 0x33, 0x07, 0x2D, 0xB9, 0x01, 0x81, 0x00, 0x08, 0x00, 0x80, 0x02, 0x01, 0x00 };
static unsigned char le[] = { 0x00, 0x01, 0xA0, 0x34, 0x01, 0x90, 0x02, 0x00, 0x03, 0x9F, 0x80, 0x32, 0x2B, 0x03, 0x00, 0x0B, 0x01, 0x00, 0x11, 0x01, 0x09, 0x06, 0x17, 0x22, 0xF0, 0x0B, 0x00, 0x0B, 0x09, 0x06, 0x17, 0x02, 0xF0, 0x0B, 0x00, 0x0B, 0x02, 0x06, 0xFF, 0x00, 0x00, 0x04, 0x07, 0x00, 0x00, 0x00, 0x04, 0x07, 0x01, 0x00, 0x00, 0x00, 0x07, 0x03, 0x00, 0x00};
#define dbg(format, arg...) dsyslog("%s:%d " format , __FILE__ , __LINE__ , ## arg)
#define err(format, arg...) {esyslog("err:%s:%d: %s (%d): " format , __FILE__ , __LINE__ ,strerror(errno), errno, ## arg);print_trace();abort();}
#define info(format, arg...) isyslog("%s:%d: " format , __FILE__ , __LINE__ ,## arg)
#define warn(format, arg...) isyslog("%s:%d: " format , __FILE__ , __LINE__ ,## arg)
#define STATIC
#else
//#define DEBUG
#include "headers.h"
#endif
#define CA_MAX_CAIDS 16
#define CA_MAX_PIDS 16
#ifndef CA_MAX_SLOTS
#define CA_MAX_SLOTS 3
#endif
typedef struct
{
u_int16_t caid[CA_MAX_CAIDS];
u_int16_t pid[CA_MAX_PIDS];
u_int16_t capid[CA_MAX_PIDS];
} caid_pid_list_t;
static caid_pid_list_t cpl[CA_MAX_SLOTS];
STATIC void dump(u_int8_t *data, int len)
{
#ifdef DEBUG
int j;
printf("Dump: ");
for(j=0;j<len;j++) {
printf("%02x ",data[j]);
}
printf("\n");
#endif
}
STATIC int ci_cpl_find_pid (int slot, int pid)
{
if (slot < 0 || slot >= CA_MAX_SLOTS) {
return -1;
}
int i;
for (i = 0; i < CA_MAX_PIDS; i++) {
if (pid == cpl[slot].pid[i])
return 1;
}
return 0;
}
STATIC int ci_cpl_find_caid (int slot, int caid)
{
if (slot < 0 || slot >= CA_MAX_SLOTS) {
return -1;
}
int i;
for (i = 0; i < CA_MAX_CAIDS; i++) {
if (caid == cpl[slot].caid[i])
return 1;
}
return 0;
}
STATIC int ci_cpl_find_capid (int slot, int pid)
{
if (slot < 0 || slot >= CA_MAX_SLOTS) {
return -1;
}
int i;
for (i = 0; i < CA_MAX_PIDS; i++) {
if (pid == cpl[slot].capid[i])
return 1;
}
return 0;
}
STATIC int ci_cpl_delete_pid (int slot, int pid)
{
if (slot < 0 || slot >= CA_MAX_SLOTS) {
return -1;
}
int i;
for (i = 0; i < CA_MAX_PIDS; i++) {
if (cpl[slot].pid[i]==pid) {
cpl[slot].pid[i] = 0;
dbg ("-------> Slot: %d Deleted pid: %04x\n", slot, pid);
return 1;
}
}
return 0;
}
STATIC int ci_cpl_update_pid (int slot, int pid)
{
if (slot < 0 || slot >= CA_MAX_SLOTS) {
return -1;
}
if (!ci_cpl_find_pid (slot, pid)) {
int i;
for (i = 0; i < CA_MAX_PIDS; i++) {
if (!cpl[slot].pid[i]) {
cpl[slot].pid[i] = pid;
dbg ("-------> Slot: %d Added pid: %04x\n", slot, pid);
return 1;
}
}
}
return 0;
}
STATIC int ci_cpl_update_caid (int slot, int caid)
{
if (slot < 0 || slot >= CA_MAX_SLOTS) {
return -1;
}
if (!ci_cpl_find_caid (slot, caid)) {
int i;
for (i = 0; i < CA_MAX_CAIDS; i++) {
if (!cpl[slot].caid[i]) {
cpl[slot].caid[i] = caid;
dbg ("-------> Slot: %d Added caid: %04x\n", slot, caid);
return 1;
}
}
}
return 0;
}
STATIC int ci_cpl_update_capid (int slot, int capid)
{
if (slot < 0 || slot >= CA_MAX_SLOTS) {
return -1;
}
if (!ci_cpl_find_capid (slot, capid)) {
int i;
for (i = 0; i < CA_MAX_PIDS; i++) {
if (!cpl[slot].capid[i]) {
cpl[slot].capid[i] = capid;
dbg ("-------> Slot: %d Added capid: %04x\n", slot, capid);
return 1;
}
}
}
return 0;
}
int ci_cpl_find_caid_by_pid (int pid)
{
int i;
int slot;
if(!pid) {
return 0;
}
for (slot = 0; slot < CA_MAX_SLOTS; slot++) {
for (i = 0; i < CA_MAX_PIDS; i++) {
if (pid == cpl[slot].pid[i]) {
return cpl[slot].caid[0];
}
}
}
return 0;
}
int ci_cpl_find_slot_by_caid_and_pid (int caid, int pid)
{
int slot;
for (slot = 0; slot < CA_MAX_SLOTS; slot++) {
if (ci_cpl_find_pid (slot, pid) && ci_cpl_find_caid (slot, caid)) {
return slot;
}
}
return -1;
}
int ci_cpl_clear (int slot)
{
if (slot < 0 || slot >= CA_MAX_SLOTS) {
return -1;
}
memset (&cpl[slot], 0, sizeof (caid_pid_list_t));
return 0;
}
int ci_cpl_clear_pids (int slot)
{
if (slot < 0 || slot >= CA_MAX_SLOTS) {
return -1;
}
memset (cpl[slot].pid, 0, sizeof (u_int16_t) * CA_MAX_PIDS);
return 0;
}
int ci_cpl_clear_caids (int slot)
{
if (slot < 0 || slot >= CA_MAX_SLOTS) {
return -1;
}
memset (cpl[slot].caid, 0, sizeof (u_int16_t) * CA_MAX_CAIDS);
return 0;
}
int ci_cpl_clear_capids (int slot)
{
if (slot < 0 || slot >= CA_MAX_SLOTS) {
return -1;
}
memset (cpl[slot].capid, 0, sizeof (u_int16_t) * CA_MAX_PIDS);
return 0;
}
STATIC int ci_decode_length (unsigned int *len, u_int8_t * v)
{
int ret = 0;
if (*v & LENGTH_SIZE_INDICATOR) {
int l = *v & 0x7f;
if (l > 4) {
return -1;
}
ret = l + 1;
*len = 0;
while (l--) {
v++;
*len <<= 8;
*len |= *v;
}
} else {
*len = *v;
ret = 1;
}
return ret;
}
#if 0
STATIC int ci_decode_al_ca_info (ci_al_t * al)
{
int i = 0;
u_int8_t *data = al->data;
int len = al->length;
if (len & 1) {
dbg ("ci_decode_al_ca_info: invalid length %d\n", len);
}
len >>= 1;
u_int16_t *caid = (u_int16_t *) malloc (sizeof (u_int16_t) * len);
ci_cpl_clear_caids (al->sl->tl->ll->slot);
while (i < len) {
caid[i++] = ntohs16 (data);
data += 2;
ci_cpl_update_caid (al->sl->tl->ll->slot, caid[i - 1]);
dbg ("CAID[%d]: %04x\n", i - 1, caid[i - 1]);
}
if (caid) {
free (caid);
}
return data - al->data;
}
#endif
STATIC int ca_decode_ca_descr (ca_desc_t ** cadescr, int count, u_int8_t * data, int len, int *magic)
{
*cadescr = (ca_desc_t *) realloc (*cadescr, sizeof (ca_desc_t *) * (count + 1));
if (!*cadescr) {
err ("ca_decode_ca_descr: out of memory\n");
}
ca_desc_t *c = *cadescr + count;
// u_int8_t descriptor_tag = *data;
data++;
u_int8_t descriptor_length = *data;
data++;
c->ca_id = ntohs16 (data);
data += 2;
c->ca_pid = ntohs16 (data);
data += 2;
dbg ("cadescr: %p %d ca_id: %04x ca_pid: %04x\n", cadescr, count, c->ca_id, c->ca_pid);
if(magic && c->ca_id > 0 && c->ca_id < 3 && c->ca_pid > 0 && c->ca_pid < 3 && c->ca_id == c->ca_pid){
*magic = c->ca_id;
}
return descriptor_length + 2;
}
STATIC int ci_decode_al_ca_pmt (ci_al_t * al)
{
ca_pmt_t p;
int magic = 0;
int slot = 0;
int cleared = 0;
memset (&p, 0, sizeof (ca_pmt_t));
int ret;
u_int8_t *data = al->data;
int len;
p.ca_pmt_list_management = *data;
data++;
p.program_number = ntohs16 (data);
data += 2;
p.version_number = *data;
data++;
p.program_info_length = (u_int16_t) ntohs16 (data);
data += 2;
dbg ("ci_decode_al_ca_pmt: ca_pmt_list_management:%02x program_number:%04x version_number:%02x program_info_length:%04x\n", p.ca_pmt_list_management, p.program_number, p.version_number, p.program_info_length);
if (p.program_info_length) {
int ca_descr_count = 0;
len = p.program_info_length - 1;
p.ca_pmt_cmd_id = *data;
dbg ("p.ca_pmt_cmd_id:%02x\n", p.ca_pmt_cmd_id);
data++;
while (len>0) {
ret = ca_decode_ca_descr (&p.cadescr, ca_descr_count, data, len, &magic);
if (magic)
slot = magic - 1;
else
slot = al->sl->tl->ll->slot;
if (!cleared) {
if(p.ca_pmt_list_management == CPLM_ONLY || p.ca_pmt_list_management == CPLM_FIRST || p.ca_pmt_list_management == CPLM_UPDATE) {
ci_cpl_clear_pids(slot);
ci_cpl_clear_capids(slot);
ci_cpl_clear_caids(slot);
cleared = 1;
}
}
if (ret < 0) {
warn ("error decoding ca_descriptor\n");
break;
}
if((magic != p.cadescr[ca_descr_count].ca_id) || (magic != p.cadescr[ca_descr_count].ca_pid)){
ci_cpl_update_caid (slot, p.cadescr[ca_descr_count].ca_id);
ci_cpl_update_capid (slot, p.cadescr[ca_descr_count].ca_pid);
}
ca_descr_count++;
data += ret;
len -= ret;
}
if (p.cadescr) {
free (p.cadescr);
}
}
len = al->length - (data - al->data);
int pidn = 0;
while (len>0) {
p.pidinfo = (pidinfo_t *) realloc (p.pidinfo, sizeof (pidinfo_t) * (pidn + 1));
if (!p.pidinfo) {
err ("ci_decode_al_ca_pmt: out of memory");
}
memset (&p.pidinfo[pidn], 0, sizeof (pidinfo_t));
p.pidinfo[pidn].stream_type = *data;
data++;
len--;
p.pidinfo[pidn].pid = ntohs16 (data);
data += 2;
len -= 2;
p.pidinfo[pidn].es_info_length = ntohs16 (data);
data += 2;
len -= 2;
dbg ("len: %d count: %d, stream_type: %02x, pid: %04x es_info_length: %04x\n", len, pidn, p.pidinfo[pidn].stream_type, p.pidinfo[pidn].pid, p.pidinfo[pidn].es_info_length);
if (p.pidinfo[pidn].es_info_length) {
int pi_len = p.pidinfo[pidn].es_info_length - 1;
p.pidinfo[pidn].ca_pmt_cmd_id = *data;
data++;
len--;
int pid_ca_descr_count = 0;
while (pi_len>0) {
ret = ca_decode_ca_descr (&p.pidinfo[pidn].cadescr, pid_ca_descr_count, data, pi_len, NULL);
if (!cleared) {
if(p.ca_pmt_list_management == CPLM_ONLY || p.ca_pmt_list_management == CPLM_FIRST || p.ca_pmt_list_management == CPLM_UPDATE) {
ci_cpl_clear_pids(slot);
ci_cpl_clear_capids(slot);
ci_cpl_clear_caids(slot);
cleared = 1;
}
}
if (ret < 0) {
warn ("error decoding ca_descriptor\n");
break;
}
if((magic != p.pidinfo[pidn].cadescr[pid_ca_descr_count].ca_id) || (magic != p.pidinfo[pidn].cadescr[pid_ca_descr_count].ca_pid)){
ci_cpl_update_pid (slot, p.pidinfo[pidn].pid);
ci_cpl_update_caid (slot, p.pidinfo[pidn].cadescr[pid_ca_descr_count].ca_id);
ci_cpl_update_capid (slot, p.pidinfo[pidn].cadescr[pid_ca_descr_count].ca_pid);
}
pid_ca_descr_count++;
data += ret;
pi_len -= ret;
len -= ret;
}
}
if (p.pidinfo[pidn].cadescr) {
free (p.pidinfo[pidn].cadescr);
}
pidn++;
}
if (p.pidinfo) {
free (p.pidinfo);
}
return 0;
}
STATIC int ci_decode_al_ca_pmt_reply (ci_al_t * al)
{
ca_pmt_reply_t p;
memset (&p, 0, sizeof (ca_pmt_reply_t));
u_int8_t *data = al->data;
int len;
p.program_number = ntohs16 (data);
data += 2;
p.version_number = *data;
data++;
p.ca_enable = *data;
data++;
len = al->length - (data - al->data);
int pidn = 0;
dbg ("ci_decode_al_ca_pmt_reply: program_number: %04x ca_enable: %02x\n", p.program_number, p.ca_enable);
while (len>0) {
p.pidcaenable = (pid_ca_enable_t *) realloc (p.pidcaenable, sizeof (pid_ca_enable_t) * (pidn + 1));
if (!p.pidcaenable) {
err ("ci_decode_al_ca_pmt_reply: out of memory\n");
}
memset (&p.pidcaenable[pidn], 0, sizeof (pid_ca_enable_t));
p.pidcaenable[pidn].pid = ntohs16 (data);
data += 2;
p.pidcaenable[pidn].ca_enable = *data;
data++;
len -= 3;
if ((p.pidcaenable[pidn].ca_enable == CPCI_OK_DESCRAMBLING) || (p.pidcaenable[pidn].ca_enable == CPCI_OK_MMI) || (p.pidcaenable[pidn].ca_enable == CPCI_QUERY)) {
ci_cpl_update_pid (al->sl->tl->ll->slot, p.pidcaenable[pidn].pid);
} else {
ci_cpl_delete_pid (al->sl->tl->ll->slot, p.pidcaenable[pidn].pid);
}
dbg ("count: %d pid: %04x pid_ca_enable: %02x\n", pidn, p.pidcaenable[pidn].pid, p.pidcaenable[pidn].ca_enable);
pidn++;
}
if (p.pidcaenable) {
free (p.pidcaenable);
}
return 0;
}
STATIC int ci_decode_al (ci_sl_t * sl)
{
int ret = 0;
int done = 0;
int len = 3;
ci_al_t al;
u_int8_t *data = sl->data;
al.sl = sl;
al.tag = 0;
while (len--) {
al.tag <<= 8;
al.tag |= *data;
data++;
}
done += 3;
ret = ci_decode_length (&al.length, data);
if (ret < 0) {
warn ("ci_decode_al ci_decode_length failed\n");
return ret;
}
data += ret;
done += ret;
//Fake
al.data = data;
dbg ("ci_decode_al: tag:%03x length: %02x data[0]:%02x done: %02x\n", al.tag, al.length, al.data[0], done);
switch (al.tag) {
case AOT_CA_INFO:
// ci_decode_al_ca_info (&al);
break;
case AOT_CA_PMT:
ci_decode_al_ca_pmt (&al);
break;
case AOT_CA_PMT_REPLY:
ci_decode_al_ca_pmt_reply (&al);
break;
}
done += al.length;
dbg ("ci_decode_al: done %02x\n", done);
return done;
}
STATIC int ci_decode_sl (ci_tl_t * tl)
{
int ret = 0;
int done = 0;
unsigned int len;
ci_sl_t sl;
u_int8_t *data = tl->data;
sl.tl = tl;
sl.tag = *data;
data++;
done++;
if(sl.tag != ST_SESSION_NUMBER) {
return tl->length;
}
ret = ci_decode_length (&len, data);
if (ret < 0) {
warn ("ci_decode_sl ci_decode_length failed\n");
return ret;
}
data += ret;
done += ret;
if (len > 4) {
warn ("invalid length (%d) for session_object_value\n", len);
return -1;
}
sl.object_value = 0;
while (len--) {
sl.object_value <<= 8;
sl.object_value |= *data;
data++;
done++;
}
sl.data = data;
sl.length = tl->length - done;
while (sl.length>0) {
dbg ("ci_decode_sl: object_value:%02x length: %02x done: %02x\n", sl.object_value, sl.length, done);
ret = ci_decode_al (&sl);
if (ret < 0) {
warn ("ci_decode_al failed\n");
return ret;
}
sl.length -= ret;
sl.data += ret;
done += ret;
}
dbg ("ci_decode_sl: done %02x\n", done);
return done;
}
STATIC int ci_decode_tl (ci_ll_t * ll)
{
int ret = 0;
int done = 0;
ci_tl_t tl;
u_int8_t *data = ll->data;
tl.ll = ll;
tl.c_tpdu_tag = *data;
data++;
done++;
ret = ci_decode_length (&tl.length, data);
if (ret < 0) {
warn ("ci_decode_tl ci_decode_length failed\n");
return ret;
}
data += ret;
done += ret;
tl.tcid = *data;
data++;
done++;
if (tl.tcid != ll->tcid) {
warn ("Error: redundant tcid mismatch %02x %02x\n",tl.tcid, ll->tcid);
return -1;
}
tl.data = data;
//According to A.4.1.1
tl.length--;
while (tl.length>0) {
dbg ("ci_decode_tl: c_tpdu_tag:%02x tcid:%02x length: %02x done: %02x\n", tl.c_tpdu_tag, tl.tcid, tl.length, done);
if (tl.c_tpdu_tag == T_DATA_LAST || tl.c_tpdu_tag == T_DATA_MORE) {
ret = ci_decode_sl (&tl);
if (ret < 0) {
warn ("ci_decode_sl failed\n");
return ret;
}
} else {
ret = tl.length;
}
tl.length -= ret;
tl.data += ret;
done += ret;
}
dbg ("ci_decode_tl: done %02x\n", done);
return done;
}
int ci_decode_ll (uint8_t * tpdu, int len)
{
int ret = 0;
int done = 0;
u_int8_t *data=tpdu;
ci_ll_t ll;
dump(tpdu,len);
ll.slot = *data;
data++;
ll.tcid = *data;
data++;
ll.data = data;
ll.length = len - (data-tpdu);
while (ll.length) {
dbg ("ci_decode_ll: slot:%02x tcid:%02x length: %02x\n", ll.slot, ll.tcid, ll.length);
ret = ci_decode_tl (&ll);
if (ret < 0) {
warn ("ci_decode_tl failed\n");
return ret;
}
ll.length -= ret;
ll.data += ret;
}
dbg ("ci_decode_ll: done %02x\n", len);
return done;
}
#ifdef TESTING
int main (int argc, char **argv)
{
int ret;
printf ("ci_decode_ll len: %02x\n", sizeof (lb));
ret = ci_decode_ll (lb, sizeof (lb));
printf ("ci_decode_ll ret: %02x\n", ret);
printf ("ci_decode_ll len: %02x\n", sizeof (ll));
ret = ci_decode_ll (ll, sizeof (ll));
printf ("ci_decode_ll ret: %02x\n", ret);
printf ("ci_decode_ll len: %02x\n", sizeof (ld));
ret = ci_decode_ll (ld, sizeof (ld));
printf ("ci_decode_ll ret: %02x\n", ret);
printf ("ci_decode_ll len: %02x\n", sizeof (lc));
ret = ci_decode_ll (lc, sizeof (lc));
printf ("ci_decode_ll ret: %02x\n", ret);
printf ("ci_decode_ll len: %02x\n", sizeof (le));
ret = ci_decode_ll (le, sizeof (le));
printf ("ci_decode_ll ret: %02x\n", ret);
// printf ("caid %04x for pid %04x\n", ci_cpl_find_caid_by_pid (0x5c), 0x5c);
return 0;
}
#endif
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