Thu Apr 28 2011 17:13:41

Asterisk developer's documentation


callerid.c File Reference

CallerID Generation support. More...

#include "asterisk.h"
#include <time.h>
#include <math.h>
#include <ctype.h>
#include "asterisk/ulaw.h"
#include "asterisk/alaw.h"
#include "asterisk/frame.h"
#include "asterisk/channel.h"
#include "asterisk/callerid.h"
#include "asterisk/fskmodem.h"
#include "asterisk/utils.h"
Include dependency graph for callerid.c:

Go to the source code of this file.

Data Structures

struct  callerid_state

Defines

#define AST_CALLERID_UNKNOWN   "<unknown>"
#define CALLERID_MARK   1200.0
#define CALLERID_SPACE   2200.0
#define CAS_FREQ1   2130.0
#define CAS_FREQ2   2750.0
#define SAS_FREQ   440.0

Functions

static int __ast_callerid_generate (unsigned char *buf, const char *name, const char *number, int callwaiting, int codec)
int ast_callerid_callwaiting_generate (unsigned char *buf, const char *name, const char *number, int codec)
 Generate Caller-ID spill but in a format suitable for Call Waiting(tm)'s Caller*ID(tm) See ast_callerid_generate() for other details.
int ast_callerid_generate (unsigned char *buf, const char *name, const char *number, int codec)
 Generate Caller-ID spill from the "callerid" field of asterisk (in e-mail address like format)
char * ast_callerid_merge (char *buf, int bufsiz, const char *name, const char *num, const char *unknown)
int ast_callerid_parse (char *instr, char **name, char **location)
 Destructively parse instr for caller id information.
int ast_callerid_split (const char *buf, char *name, int namelen, char *num, int numlen)
const char * ast_describe_caller_presentation (int data)
 Convert caller ID pres value to explanatory string.
int ast_gen_cas (unsigned char *outbuf, int sendsas, int len, int codec)
int ast_is_shrinkable_phonenumber (const char *exten)
 checks if string consists only of digits and ( ) - * # and + Pre-qualifies the string for ast_shrink_phone_number()
static int ast_is_valid_string (const char *exten, const char *valid)
 Checks if phone number consists of valid characters.
int ast_isphonenumber (const char *n)
 checks if string consists only of digits and * # and +
const char * ast_named_caller_presentation (int data)
 Convert caller ID pres value to text code.
int ast_parse_caller_presentation (const char *data)
 Convert caller ID text code to value used in config file parsing.
void ast_shrink_phone_number (char *n)
 Clean up phone string remove '(', ' ', ')', non-trailing '.', and '-' not in square brackets. Basically, remove anything that could be invalid in a pattern.
static unsigned short calc_crc (unsigned short crc, unsigned char data)
int callerid_feed (struct callerid_state *cid, unsigned char *ubuf, int len, int codec)
 Read samples into the state machine.
int callerid_feed_jp (struct callerid_state *cid, unsigned char *ubuf, int len, int codec)
 Read samples into the state machine.
void callerid_free (struct callerid_state *cid)
 Free a callerID state.
int callerid_generate (unsigned char *buf, const char *number, const char *name, int flags, int callwaiting, int codec)
 Generates a CallerID FSK stream in ulaw format suitable for transmission.
static int callerid_genmsg (char *msg, int size, const char *number, const char *name, int flags)
void callerid_get (struct callerid_state *cid, char **name, char **number, int *flags)
 Extract info out of callerID state machine. Flags are listed above.
void callerid_get_dtmf (char *cidstring, char *number, int *flags)
void callerid_init (void)
 Initialize stuff for inverse FFT.
struct callerid_statecallerid_new (int cid_signalling)
 Create a callerID state machine.
static void gen_tone (unsigned char *buf, int len, int codec, float ddr1, float ddi1, float *cr1, float *ci1)
static void gen_tones (unsigned char *buf, int len, int codec, float ddr1, float ddi1, float ddr2, float ddi2, float *cr1, float *ci1, float *cr2, float *ci2)
int vmwi_generate (unsigned char *buf, int active, int type, int codec, const char *name, const char *number, int flags)
 Generate message waiting indicator.

Variables

float casdi1
float casdi2
float casdr1
float casdr2
float cid_di [4]
float cid_dr [4]
float clidsb = 8000.0 / 1200.0
struct {
   const char *   description
   const char *   name
   int   val
pres_types []
float sasdi
float sasdr

Detailed Description

CallerID Generation support.

Author:
Mark Spencer <markster@digium.com>

Definition in file callerid.c.


Define Documentation

#define AST_CALLERID_UNKNOWN   "<unknown>"

Definition at line 72 of file callerid.c.

#define CALLERID_MARK   1200.0

1200 hz for "1"

Definition at line 67 of file callerid.c.

Referenced by callerid_init().

#define CALLERID_SPACE   2200.0

2200 hz for "0"

Definition at line 66 of file callerid.c.

Referenced by callerid_init().

#define CAS_FREQ1   2130.0

Definition at line 69 of file callerid.c.

Referenced by callerid_init().

#define CAS_FREQ2   2750.0

Definition at line 70 of file callerid.c.

Referenced by callerid_init().

#define SAS_FREQ   440.0

Definition at line 68 of file callerid.c.

Referenced by callerid_init().


Function Documentation

static int __ast_callerid_generate ( unsigned char *  buf,
const char *  name,
const char *  number,
int  callwaiting,
int  codec 
) [static]

Definition at line 1055 of file callerid.c.

References ast_strlen_zero(), and callerid_generate().

Referenced by ast_callerid_callwaiting_generate(), and ast_callerid_generate().

{
   if (ast_strlen_zero(name))
      name = NULL;
   if (ast_strlen_zero(number))
      number = NULL;
   return callerid_generate(buf, number, name, 0, callwaiting, codec);
}
int ast_callerid_callwaiting_generate ( unsigned char *  buf,
const char *  name,
const char *  number,
int  codec 
)

Generate Caller-ID spill but in a format suitable for Call Waiting(tm)'s Caller*ID(tm) See ast_callerid_generate() for other details.

Definition at line 1069 of file callerid.c.

References __ast_callerid_generate().

Referenced by send_cwcidspill().

{
   return __ast_callerid_generate(buf, name, number, 1, codec);
}
int ast_callerid_generate ( unsigned char *  buf,
const char *  name,
const char *  number,
int  codec 
)

Generate Caller-ID spill from the "callerid" field of asterisk (in e-mail address like format)

Parameters:
bufbuffer for output samples. See callerid_generate() for details regarding buffer.
nameCaller-ID Name
numberCaller-ID Number
codecAsterisk codec (either AST_FORMAT_ALAW or AST_FORMAT_ULAW)

Acts like callerid_generate except uses an asterisk format callerid string.

Definition at line 1064 of file callerid.c.

References __ast_callerid_generate().

Referenced by dahdi_call().

{
   return __ast_callerid_generate(buf, name, number, 0, codec);
}
char* ast_callerid_merge ( char *  buf,
int  bufsiz,
const char *  name,
const char *  num,
const char *  unknown 
)

Definition at line 1074 of file callerid.c.

References ast_copy_string(), and buf.

Referenced by _sip_show_peer(), _skinny_show_line(), handle_cli_iax2_show_peer(), leave_voicemail(), prep_email_sub_vars(), and sip_show_user().

{
   if (!unknown)
      unknown = "<unknown>";
   if (name && num)
      snprintf(buf, bufsiz, "\"%s\" <%s>", name, num);
   else if (name) 
      ast_copy_string(buf, name, bufsiz);
   else if (num)
      ast_copy_string(buf, num, bufsiz);
   else
      ast_copy_string(buf, unknown, bufsiz);
   return buf;
}
int ast_callerid_parse ( char *  instr,
char **  name,
char **  location 
)

Destructively parse instr for caller id information.

Destructively parse inbuf into name and location (or number) Parses callerid stream from inbuf and changes into useable form, outputed in name and location.

Returns:
always returns 0, as the code always returns something.
Note:
XXX 'name' is not parsed consistently e.g. we have input location name " foo bar " <123> 123 ' foo bar ' (with spaces around) " foo bar " NULL 'foo bar' (without spaces around) The parsing of leading and trailing space/quotes should be more consistent.

Definition at line 1006 of file callerid.c.

References ast_copy_string(), ast_isphonenumber(), ast_shrink_phone_number(), ast_skip_blanks(), and ast_trim_blanks().

Referenced by action_originate(), adsi_message(), advanced_options(), ast_callerid_split(), ast_privacy_check(), ast_privacy_set(), handle_setcallerid(), misdn_new(), play_message_callerid(), rpt_call(), rpt_exec(), unistim_new(), and write_metadata().

{
   char *ns, *ne, *ls, *le;

   /* Try "name" <location> format or name <location> format */
   if ((ls = strrchr(instr, '<')) && (le = strrchr(ls, '>'))) {
      *ls = *le = '\0'; /* location found, trim off the brackets */
      *location = ls + 1;  /* and this is the result */
      if ((ns = strchr(instr, '"')) && (ne = strchr(ns + 1, '"'))) {
         *ns = *ne = '\0'; /* trim off the quotes */
         *name = ns + 1;      /* and this is the name */
      } else if (ns) {
         /* An opening quote was found but no closing quote was. The closing
          * quote may actually be after the end of the bracketed number
          */
         if (strchr(le + 1, '\"')) {
            *ns = '\0';
            *name = ns + 1;
            ast_trim_blanks(*name);
         } else {
            *name = NULL;
         }
      } else { /* no quotes, trim off leading and trailing spaces */
         *name = ast_skip_blanks(instr);
         ast_trim_blanks(*name);
      }
   } else { /* no valid brackets */
      char tmp[256];

      ast_copy_string(tmp, instr, sizeof(tmp));
      ast_shrink_phone_number(tmp);
      if (ast_isphonenumber(tmp)) { /* Assume it's just a location */
         *name = NULL;
         strcpy(instr, tmp); /* safe, because tmp will always be the same size or smaller than instr */
         *location = instr;
      } else { /* Assume it's just a name. */
         *location = NULL;
         if ((ns = strchr(instr, '"')) && (ne = strchr(ns + 1, '"'))) {
            *ns = *ne = '\0'; /* trim off the quotes */
            *name = ns + 1;      /* and this is the name */
         } else { /* no quotes, trim off leading and trailing spaces */
            *name = ast_skip_blanks(instr);
            ast_trim_blanks(*name);
         }
      }
   }
   return 0;
}
int ast_callerid_split ( const char *  buf,
char *  name,
int  namelen,
char *  num,
int  numlen 
)
const char* ast_describe_caller_presentation ( int  data)

Convert caller ID pres value to explanatory string.

Parameters:
datavalue (see callerid.h AST_PRES_ )
Returns:
string for human presentation

Definition at line 1149 of file callerid.c.

References ARRAY_LEN, and pres_types.

Referenced by _sip_show_peer(), report_new_callerid(), and sip_show_user().

{
   int i;

   for (i = 0; i < ARRAY_LEN(pres_types); i++) {
      if (pres_types[i].val == data)
         return pres_types[i].description;
   }

   return "unknown";
}
int ast_gen_cas ( unsigned char *  outbuf,
int  sas,
int  len,
int  codec 
)

Generate a CAS (CPE Alert Signal) tone for 'n' samples

Parameters:
outbufAllocated buffer for data. Must be at least 2400 bytes unless no SAS is desired
sasNon-zero if CAS should be preceeded by SAS
lenHow many samples to generate.
codecWhich codec (AST_FORMAT_ALAW or AST_FORMAT_ULAW)
Returns:
Returns -1 on error (if len is less than 2400), 0 on success.

Definition at line 258 of file callerid.c.

References gen_tone(), gen_tones(), and callerid_state::pos.

Referenced by __adsi_transmit_messages(), and dahdi_callwait().

{
   int pos = 0;
   int saslen = 2400;
   float cr1 = 1.0;
   float ci1 = 0.0;
   float cr2 = 1.0;
   float ci2 = 0.0;

   if (sendsas) {
      if (len < saslen)
         return -1;
      gen_tone(outbuf, saslen, codec, sasdr, sasdi, &cr1, &ci1);
      len -= saslen;
      pos += saslen;
      cr2 = cr1;
      ci2 = ci1;
   }
   gen_tones(outbuf + pos, len, codec, casdr1, casdi1, casdr2, casdi2, &cr1, &ci1, &cr2, &ci2);
   return 0;
}
int ast_is_shrinkable_phonenumber ( const char *  exten)

checks if string consists only of digits and ( ) - * # and + Pre-qualifies the string for ast_shrink_phone_number()

Check if a string consists only of digits and and + # ( ) - . (meaning it can be cleaned with ast_shrink_phone_number)

Returns:
1 if string is valid AST shrinkable phone number
0 if not

Definition at line 992 of file callerid.c.

References ast_is_valid_string().

Referenced by check_peer_ok(), check_user_full(), and replace_cid().

{
   return ast_is_valid_string(exten, "0123456789*#+()-.");
}
static int ast_is_valid_string ( const char *  exten,
const char *  valid 
) [static]

Checks if phone number consists of valid characters.

Parameters:
extenString that needs to be checked
validValid characters in string
Returns:
1 if valid string, 0 if string contains invalid characters

Definition at line 966 of file callerid.c.

References ast_strlen_zero().

Referenced by ast_is_shrinkable_phonenumber(), and ast_isphonenumber().

{
   int x;

   if (ast_strlen_zero(exten))
      return 0;
   for (x = 0; exten[x]; x++)
      if (!strchr(valid, exten[x]))
         return 0;
   return 1;
}
int ast_isphonenumber ( const char *  n)

checks if string consists only of digits and * # and +

Check if a string consists only of digits and + #.

Returns:
1 if string is valid AST phone number
0 if not

Definition at line 982 of file callerid.c.

References ast_is_valid_string().

Referenced by ast_callerid_parse().

{
   return ast_is_valid_string(n, "0123456789*#+");
}
const char* ast_named_caller_presentation ( int  data)

Convert caller ID pres value to text code.

Parameters:
datatext string
Returns:
string for config file

Definition at line 1165 of file callerid.c.

References ARRAY_LEN, and pres_types.

Referenced by callerid_read(), and callerpres_read().

{
   int i;

   for (i = 0; i < ARRAY_LEN(pres_types); i++) {
      if (pres_types[i].val == data)
         return pres_types[i].name;
   }

   return "unknown";
}
int ast_parse_caller_presentation ( const char *  data)

Convert caller ID text code to value used in config file parsing.

Parameters:
datatext string
Returns:
value AST_PRES_ from callerid.h

Definition at line 1130 of file callerid.c.

References ARRAY_LEN, name, and pres_types.

Referenced by build_peer(), callerid_write(), callerpres_write(), and setcallerid_pres_exec().

{
   int i;
   if (!data) {
      return -1;
   }

   for (i = 0; i < ARRAY_LEN(pres_types); i++) {
      if (!strcasecmp(pres_types[i].name, data))
         return pres_types[i].val;
   }

   return -1;
}
void ast_shrink_phone_number ( char *  n)

Clean up phone string remove '(', ' ', ')', non-trailing '.', and '-' not in square brackets. Basically, remove anything that could be invalid in a pattern.

Shrink a phone number in place to just digits (more accurately it just removes ()'s, .'s, and -'s...

Definition at line 929 of file callerid.c.

Referenced by action_originate(), ast_callerid_parse(), ast_callerid_split(), ast_privacy_check(), ast_privacy_set(), check_access(), check_peer_ok(), check_user_full(), handle_setcallerid(), pbx_load_config(), replace_cid(), rpt_exec(), setup_privacy_args(), ss_thread(), and write_metadata().

{
   int x, y = 0;
   int bracketed = 0;

   for (x = 0; n[x]; x++) {
      switch (n[x]) {
      case '[':
         bracketed++;
         n[y++] = n[x];
         break;
      case ']':
         bracketed--;
         n[y++] = n[x];
         break;
      case '-':
         if (bracketed)
            n[y++] = n[x];
         break;
      case '.':
         if (!n[x+1])
            n[y++] = n[x];
         break;
      default:
         /* ignore parenthesis and whitespace */
         if (!strchr("( )", n[x]))
            n[y++] = n[x];
      }
   }
   n[y] = '\0';
}
static unsigned short calc_crc ( unsigned short  crc,
unsigned char  data 
) [static]

Definition at line 280 of file callerid.c.

References callerid_state::crc, and org.

Referenced by callerid_feed_jp().

{
   unsigned int i, j, org, dst;
   org = data;
   dst = 0;

   for (i = 0; i < CHAR_BIT; i++) {
      org <<= 1;
      dst >>= 1;
      if (org & 0x100) 
         dst |= 0x80;
   }
   data = (unsigned char) dst;
   crc ^= (unsigned int) data << (16 - CHAR_BIT);
   for (j = 0; j < CHAR_BIT; j++) {
      if (crc & 0x8000U)
         crc = (crc << 1) ^ 0x1021U ;
      else
         crc <<= 1 ;
   }
      return crc;
}
int callerid_feed ( struct callerid_state cid,
unsigned char *  ubuf,
int  samples,
int  codec 
)

Read samples into the state machine.

Parameters:
cidWhich state machine to act upon
ubufcontaining your samples
samplesnumber of samples contained within the buffer.
codecwhich codec (AST_FORMAT_ALAW or AST_FORMAT_ULAW)

Send received audio to the Caller*ID demodulator.

Returns:
Returns -1 on error, 0 for "needs more samples", and 1 if the CallerID spill reception is complete.

Definition at line 542 of file callerid.c.

References ast_copy_string(), ast_log(), ast_strlen_zero(), AST_XLAW, buf, CID_MSGWAITING, CID_NOMSGWAITING, CID_PRIVATE_NAME, CID_PRIVATE_NUMBER, CID_UNKNOWN_NAME, CID_UNKNOWN_NUMBER, callerid_state::cksum, callerid_state::flags, fsk_serial(), callerid_state::fskd, callerid_state::len, len(), LOG_ERROR, LOG_NOTICE, LOG_WARNING, callerid_state::name, callerid_state::number, callerid_state::oldlen, callerid_state::oldstuff, callerid_state::pos, callerid_state::rawdata, callerid_state::sawflag, and callerid_state::type.

Referenced by mwi_thread(), and ss_thread().

{
   int mylen = len;
   int olen;
   int b = 'X';
   int res;
   int x;
   short *buf;

   buf = alloca(2 * len + cid->oldlen);

   memcpy(buf, cid->oldstuff, cid->oldlen);
   mylen += cid->oldlen/2;

   for (x = 0; x < len; x++) 
      buf[x+cid->oldlen/2] = AST_XLAW(ubuf[x]);
   while (mylen >= 160) {
      olen = mylen;
      res = fsk_serial(&cid->fskd, buf, &mylen, &b);
      if (mylen < 0) {
         ast_log(LOG_ERROR, "No start bit found in fsk data.\n");
         return -1;
      }
      buf += (olen - mylen);
      if (res < 0) {
         ast_log(LOG_NOTICE, "fsk_serial failed\n");
         return -1;
      }
      if (res == 1) {
         /* Ignore invalid bytes */
         if (b > 0xff)
            continue;
         switch (cid->sawflag) {
         case 0: /* Look for flag */
            if (b == 'U')
               cid->sawflag = 2;
            break;
         case 2: /* Get lead-in */
            if ((b == 0x04) || (b == 0x80) || (b == 0x06) || (b == 0x82)) {
               cid->type = b;
               cid->sawflag = 3;
               cid->cksum = b;
            }
            break;
         case 3:  /* Get length */
            /* Not a lead in.  We're ready  */
            cid->sawflag = 4;
            cid->len = b;
            cid->pos = 0;
            cid->cksum += b;
            break;
         case 4: /* Retrieve message */
            if (cid->pos >= 128) {
               ast_log(LOG_WARNING, "Caller ID too long???\n");
               return -1;
            }
            cid->rawdata[cid->pos++] = b;
            cid->len--;
            cid->cksum += b;
            if (!cid->len) {
               cid->rawdata[cid->pos] = '\0';
               cid->sawflag = 5;
            }
            break;
         case 5: /* Check checksum */
            if (b != (256 - (cid->cksum & 0xff))) {
               ast_log(LOG_NOTICE, "Caller*ID failed checksum\n");
               /* Try again */
               cid->sawflag = 0;
               break;
            }
      
            cid->number[0] = '\0';
            cid->name[0] = '\0';
            /* Update flags */
            cid->flags = 0;
            /* If we get this far we're fine.  */
            if ((cid->type == 0x80) || (cid->type == 0x82)) {
               /* MDMF */
               /* Go through each element and process */
               for (x = 0; x < cid->pos;) {
                  switch (cid->rawdata[x++]) {
                  case 1:
                     /* Date */
                     break;
                  case 2: /* Number */
                  case 3: /* Number (for Zebble) */
                  case 4: /* Number */
                     res = cid->rawdata[x];
                     if (res > 32) {
                        ast_log(LOG_NOTICE, "Truncating long caller ID number from %d bytes to 32\n", cid->rawdata[x]);
                        res = 32; 
                     }
                     if (ast_strlen_zero(cid->number)) {
                        memcpy(cid->number, cid->rawdata + x + 1, res);
                        /* Null terminate */
                        cid->number[res] = '\0';
                     }
                     break;
                  case 6: /* Stentor Call Qualifier (ie. Long Distance call) */
                     break;
                  case 7: /* Name */
                  case 8: /* Name */
                     res = cid->rawdata[x];
                     if (res > 32) {
                        ast_log(LOG_NOTICE, "Truncating long caller ID name from %d bytes to 32\n", cid->rawdata[x]);
                        res = 32; 
                     }
                     memcpy(cid->name, cid->rawdata + x + 1, res);
                     cid->name[res] = '\0';
                     break;
                  case 11: /* Message Waiting */
                     res = cid->rawdata[x + 1];
                     if (res)
                        cid->flags |= CID_MSGWAITING;
                     else
                        cid->flags |= CID_NOMSGWAITING;
                     break;
                  case 17: /* UK: Call type, 1=Voice Call, 2=Ringback when free, 129=Message waiting  */
                  case 19: /* UK: Network message system status (Number of messages waiting) */
                  case 22: /* Something French */
                     break;
                  default:
                     ast_log(LOG_NOTICE, "Unknown IE %d\n", cid->rawdata[x - 1]);
                  }
                  res = cid->rawdata[x];
                  if (0 > res){  /* Negative offset in the CID Spill */
                     ast_log(LOG_NOTICE, "IE %d has bad field length of %d at offset %d\n", cid->rawdata[x-1], cid->rawdata[x], x);
                     /* Try again */
                     cid->sawflag = 0;
                     break;   /* Exit the loop */
                  }
                  x += cid->rawdata[x];
                  x++;
               }
            } else if (cid->type == 0x6) {
               /* VMWI SDMF */
               if (cid->rawdata[2] == 0x42) {
                  cid->flags |= CID_MSGWAITING;
               } else if (cid->rawdata[2] == 0x6f) {
                  cid->flags |= CID_NOMSGWAITING;
               }
            } else {
               /* SDMF */
               ast_copy_string(cid->number, cid->rawdata + 8, sizeof(cid->number));
            }
            if (!strcmp(cid->number, "P")) {
               strcpy(cid->number, "");
               cid->flags |= CID_PRIVATE_NUMBER;
            } else if (!strcmp(cid->number, "O") || ast_strlen_zero(cid->number)) {
               strcpy(cid->number, "");
               cid->flags |= CID_UNKNOWN_NUMBER;
            }
            if (!strcmp(cid->name, "P")) {
               strcpy(cid->name, "");
               cid->flags |= CID_PRIVATE_NAME;
            } else if (!strcmp(cid->name, "O") || ast_strlen_zero(cid->name)) {
               strcpy(cid->name, "");
               cid->flags |= CID_UNKNOWN_NAME;
            }
            return 1;
            break;
         default:
            ast_log(LOG_ERROR, "Dunno what to do with a digit in sawflag %d\n", cid->sawflag);
         }
      }
   }
   if (mylen) {
      memcpy(cid->oldstuff, buf, mylen * 2);
      cid->oldlen = mylen * 2;
   } else
      cid->oldlen = 0;

   return 0;
}
int callerid_feed_jp ( struct callerid_state cid,
unsigned char *  ubuf,
int  samples,
int  codec 
)

Read samples into the state machine.

Parameters:
cidWhich state machine to act upon
ubufcontaining your samples
samplesnumber of samples contained within the buffer.
codecwhich codec (AST_FORMAT_ALAW or AST_FORMAT_ULAW)

Send received audio to the Caller*ID demodulator (for japanese style lines).

Returns:
Returns -1 on error, 0 for "needs more samples", and 1 if the CallerID spill reception is complete.

Definition at line 303 of file callerid.c.

References ast_copy_string(), ast_debug, ast_log(), AST_XLAW, buf, calc_crc(), CID_UNKNOWN_NUMBER, callerid_state::crc, callerid_state::flags, fsk_serial(), callerid_state::fskd, callerid_state::len, len(), LOG_ERROR, LOG_NOTICE, LOG_WARNING, callerid_state::name, callerid_state::number, callerid_state::oldlen, callerid_state::oldstuff, option_debug, callerid_state::pos, callerid_state::rawdata, callerid_state::sawflag, and callerid_state::skipflag.

Referenced by ss_thread().

{
   int mylen = len;
   int olen;
   int b = 'X';
   int b2;
   int res;
   int x;
   short *buf;

   buf = alloca(2 * len + cid->oldlen);

   memcpy(buf, cid->oldstuff, cid->oldlen);
   mylen += cid->oldlen / 2;

   for (x = 0; x < len; x++) 
      buf[x+cid->oldlen/2] = AST_XLAW(ubuf[x]);

   while (mylen >= 160) {
      b = b2 = 0;
      olen = mylen;
      res = fsk_serial(&cid->fskd, buf, &mylen, &b);

      if (mylen < 0) {
         ast_log(LOG_ERROR, "No start bit found in fsk data.\n");
         return -1;
      }

      buf += (olen - mylen);

      if (res < 0) {
         ast_log(LOG_NOTICE, "fsk_serial failed\n");
         return -1;
      }

      if (res == 1) {
         b2 = b;
         b  &= 0x7f;

         /* crc checksum calculation */
         if (cid->sawflag > 1)
            cid->crc = calc_crc(cid->crc, (unsigned char) b2);

         /* Ignore invalid bytes */
         if (b > 0xff)
            continue;

         /* skip DLE if needed */
         if (cid->sawflag > 0) {
            if (cid->sawflag != 5 && cid->skipflag == 0 && b == 0x10) {
               cid->skipflag = 1 ;
               continue ;
            }
         }
         if (cid->skipflag == 1)
            cid->skipflag = 0 ;

         /* caller id retrieval */
         switch (cid->sawflag) {
         case 0: /* DLE */
            if (b == 0x10) {
               cid->sawflag = 1;
               cid->skipflag = 0;
               cid->crc = 0;
            }
            break;
         case 1: /* SOH */
            if (b == 0x01) 
               cid->sawflag = 2;
            break ;
         case 2: /* HEADER */
            if (b == 0x07) 
               cid->sawflag = 3;
            break;
         case 3: /* STX */
            if (b == 0x02) 
               cid->sawflag = 4;
            break;
         case 4: /* SERVICE TYPE */
            if (b == 0x40) 
               cid->sawflag = 5;
            break;
         case 5: /* Frame Length */
            cid->sawflag = 6;
            break;   
         case 6: /* NUMBER TYPE */
            cid->sawflag = 7;
            cid->pos = 0;
            cid->rawdata[cid->pos++] = b;
            break;
         case 7:  /* NUMBER LENGTH */
            cid->sawflag = 8;
            cid->len = b;
            if ((cid->len+2) >= sizeof(cid->rawdata)) {
               ast_log(LOG_WARNING, "too long caller id string\n") ;
               return -1;
            }
            cid->rawdata[cid->pos++] = b;
            break;
         case 8:  /* Retrieve message */
            cid->rawdata[cid->pos++] = b;
            cid->len--;
            if (cid->len<=0) {
               cid->rawdata[cid->pos] = '\0';
               cid->sawflag = 9;
            }
            break;
         case 9:  /* ETX */
            cid->sawflag = 10;
            break;
         case 10: /* CRC Checksum 1 */
            cid->sawflag = 11;
            break;
         case 11: /* CRC Checksum 2 */
            cid->sawflag = 12;
            if (cid->crc != 0) {
               ast_log(LOG_WARNING, "crc checksum error\n") ;
               return -1;
            } 
            /* extract caller id data */
            for (x = 0; x < cid->pos;) {
               switch (cid->rawdata[x++]) {
               case 0x02: /* caller id  number */
                  cid->number[0] = '\0';
                  cid->name[0] = '\0';
                  cid->flags = 0;
                  res = cid->rawdata[x++];
                  ast_copy_string(cid->number, &cid->rawdata[x], res+1);
                  x += res;
                  break;
               case 0x21: /* additional information */
                  /* length */
                  x++; 
                  /* number type */
                  switch (cid->rawdata[x]) { 
                  case 0x00: /* unknown */
                  case 0x01: /* international number */
                  case 0x02: /* domestic number */
                  case 0x03: /* network */
                  case 0x04: /* local call */
                  case 0x06: /* short dial number */
                  case 0x07: /* reserved */
                  default:   /* reserved */
                     ast_debug(2, "cid info:#1=%X\n", cid->rawdata[x]);
                     break ;
                  }
                  x++; 
                  /* numbering plan octed 4 */
                  x++; 
                  /* numbering plan octed 5 */
                  switch (cid->rawdata[x]) { 
                  case 0x00: /* unknown */
                  case 0x01: /* recommendation E.164 ISDN */
                  case 0x03: /* recommendation X.121 */
                  case 0x04: /* telex dial plan */
                  case 0x08: /* domestic dial plan */
                  case 0x09: /* private dial plan */
                  case 0x05: /* reserved */
                  default:   /* reserved */
                     ast_debug(2, "cid info:#2=%X\n", cid->rawdata[x]);
                     break ;
                  }
                  x++; 
                  break ;
               case 0x04: /* no callerid reason */
                  /* length */
                  x++; 
                  /* no callerid reason code */
                  switch (cid->rawdata[x]) {
                  case 'P': /* caller id denied by user */
                  case 'O': /* service not available */
                  case 'C': /* pay phone */
                  case 'S': /* service congested */
                     cid->flags |= CID_UNKNOWN_NUMBER;
                     ast_debug(2, "no cid reason:%c\n", cid->rawdata[x]);
                     break ;
                  }
                  x++; 
                  break ;
               case 0x09: /* dialed number */
                  /* length */
                  res = cid->rawdata[x++];
                  /* dialed number */
                  x += res;
                  break ;
               case 0x22: /* dialed number additional information */
                  /* length */
                  x++;
                  /* number type */
                  switch (cid->rawdata[x]) {
                  case 0x00: /* unknown */
                  case 0x01: /* international number */
                  case 0x02: /* domestic number */
                  case 0x03: /* network */
                  case 0x04: /* local call */
                  case 0x06: /* short dial number */
                  case 0x07: /* reserved */
                  default:   /* reserved */
                     if (option_debug > 1)
                        ast_log(LOG_NOTICE, "did info:#1=%X\n", cid->rawdata[x]);
                     break ;
                  }
                  x++;
                  /* numbering plan octed 4 */
                  x++;
                  /* numbering plan octed 5 */
                  switch (cid->rawdata[x]) {
                  case 0x00: /* unknown */
                  case 0x01: /* recommendation E.164 ISDN */
                  case 0x03: /* recommendation X.121 */
                  case 0x04: /* telex dial plan */
                  case 0x08: /* domestic dial plan */
                  case 0x09: /* private dial plan */
                  case 0x05: /* reserved */
                  default:   /* reserved */
                     ast_debug(2, "did info:#2=%X\n", cid->rawdata[x]);
                     break ;
                  }
                  x++;
                  break ;
               }
            }
            return 1;
            break;
         default:
            ast_log(LOG_ERROR, "invalid value in sawflag %d\n", cid->sawflag);
         }
      }
   }
   if (mylen) {
      memcpy(cid->oldstuff, buf, mylen * 2);
      cid->oldlen = mylen * 2;
   } else
      cid->oldlen = 0;
   
   return 0;
}
void callerid_free ( struct callerid_state cid)

Free a callerID state.

Parameters:
cidThis is the callerid_state state machine to free This function frees callerid_state cid.

Definition at line 718 of file callerid.c.

References ast_free.

Referenced by mwi_thread(), and ss_thread().

{
   ast_free(cid);
}
int callerid_generate ( unsigned char *  buf,
const char *  number,
const char *  name,
int  flags,
int  callwaiting,
int  codec 
)

Generates a CallerID FSK stream in ulaw format suitable for transmission.

Parameters:
bufBuffer to use. If "buf" is supplied, it will use that buffer instead of allocating its own. "buf" must be at least 32000 bytes in size of you want to be sure you don't have an overrun.
numberUse NULL for no number or "P" for "private"
namename to be used
flagspassed flags
callwaitingcallwaiting flag
codec-- either AST_FORMAT_ULAW or AST_FORMAT_ALAW This function creates a stream of callerid (a callerid spill) data in ulaw format.
Returns:
It returns the size (in bytes) of the data (if it returns a size of 0, there is probably an error)

Definition at line 882 of file callerid.c.

References callerid_genmsg(), len(), msg, PUT_BYTE, PUT_CLID, and PUT_CLID_MARKMS.

Referenced by __ast_callerid_generate().

{
   int bytes = 0;
   int x, sum;
   int len;

   /* Initial carriers (real/imaginary) */
   float cr = 1.0;
   float ci = 0.0;
   float scont = 0.0;
   char msg[256];
   len = callerid_genmsg(msg, sizeof(msg), number, name, flags);
   if (!callwaiting) {
      /* Wait a half a second */
      for (x = 0; x < 4000; x++)
         PUT_BYTE(0x7f);
      /* Transmit 30 0x55's (looks like a square wave) for channel seizure */
      for (x = 0; x < 30; x++)
         PUT_CLID(0x55);
   }
   /* Send 150ms of callerid marks */
   for (x = 0; x < 150; x++)
      PUT_CLID_MARKMS;
   /* Send 0x80 indicating MDMF format */
   PUT_CLID(0x80);
   /* Put length of whole message */
   PUT_CLID(len);
   sum = 0x80 + strlen(msg);
   /* Put each character of message and update checksum */
   for (x = 0; x < len; x++) {
      PUT_CLID(msg[x]);
      sum += msg[x];
   }
   /* Send 2's compliment of sum */
   PUT_CLID(256 - (sum & 255));

   /* Send 50 more ms of marks */
   for (x = 0; x < 50; x++)
      PUT_CLID_MARKMS;
   
   return bytes;
}
static int callerid_genmsg ( char *  msg,
int  size,
const char *  number,
const char *  name,
int  flags 
) [static]

Definition at line 723 of file callerid.c.

References ast_localtime(), ast_strlen_zero(), ast_tvnow(), CID_PRIVATE_NAME, CID_PRIVATE_NUMBER, CID_UNKNOWN_NAME, CID_UNKNOWN_NUMBER, msg, ast_tm::tm_hour, ast_tm::tm_mday, ast_tm::tm_min, and ast_tm::tm_mon.

Referenced by callerid_generate(), and vmwi_generate().

{
   struct timeval now = ast_tvnow();
   struct ast_tm tm;
   char *ptr;
   int res;
   int i, x;

   /* Get the time */
   ast_localtime(&now, &tm, NULL);
   
   ptr = msg;
   
   /* Format time and message header */
   res = snprintf(ptr, size, "\001\010%02d%02d%02d%02d", tm.tm_mon + 1,
            tm.tm_mday, tm.tm_hour, tm.tm_min);
   size -= res;
   ptr += res;
   if (ast_strlen_zero(number) || (flags & CID_UNKNOWN_NUMBER)) {
      /* Indicate number not known */
      res = snprintf(ptr, size, "\004\001O");
      size -= res;
      ptr += res;
   } else if (flags & CID_PRIVATE_NUMBER) {
      /* Indicate number is private */
      res = snprintf(ptr, size, "\004\001P");
      size -= res;
      ptr += res;
   } else {
      /* Send up to 16 digits of number MAX */
      i = strlen(number);
      if (i > 16)
         i = 16;
      res = snprintf(ptr, size, "\002%c", i);
      size -= res;
      ptr += res;
      for (x = 0; x < i; x++)
         ptr[x] = number[x];
      ptr[i] = '\0';
      ptr += i;
      size -= i;
   }

   if (ast_strlen_zero(name) || (flags & CID_UNKNOWN_NAME)) {
      /* Indicate name not known */
      res = snprintf(ptr, size, "\010\001O");
      size -= res;
      ptr += res;
   } else if (flags & CID_PRIVATE_NAME) {
      /* Indicate name is private */
      res = snprintf(ptr, size, "\010\001P");
      size -= res;
      ptr += res;
   } else {
      /* Send up to 16 digits of name MAX */
      i = strlen(name);
      if (i > 16)
         i = 16;
      res = snprintf(ptr, size, "\007%c", i);
      size -= res;
      ptr += res;
      for (x = 0; x < i; x++)
         ptr[x] = name[x];
      ptr[i] = '\0';
      ptr += i;
      size -= i;
   }
   return (ptr - msg);
   
}
void callerid_get ( struct callerid_state cid,
char **  number,
char **  name,
int *  flags 
)

Extract info out of callerID state machine. Flags are listed above.

Parameters:
cidCallerid state machine to act upon
numberPass the address of a pointer-to-char (will contain the phone number)
namePass the address of a pointer-to-char (will contain the name)
flagsPass the address of an int variable(will contain the various callerid flags)

This function extracts a callerid string out of a callerid_state state machine. If no number is found, *number will be set to NULL. Likewise for the name. Flags can contain any of the following:

Returns:
Returns nothing.

Definition at line 185 of file callerid.c.

References CID_PRIVATE_NAME, CID_PRIVATE_NUMBER, CID_UNKNOWN_NAME, CID_UNKNOWN_NUMBER, callerid_state::flags, callerid_state::name, and callerid_state::number.

Referenced by mwi_thread(), and ss_thread().

{
   *flags = cid->flags;
   if (cid->flags & (CID_UNKNOWN_NAME | CID_PRIVATE_NAME))
      *name = NULL;
   else
      *name = cid->name;
   if (cid->flags & (CID_UNKNOWN_NUMBER | CID_PRIVATE_NUMBER))
      *number = NULL;
   else
      *number = cid->number;
}
void callerid_get_dtmf ( char *  cidstring,
char *  number,
int *  flags 
)

Get and parse DTMF-based callerid

Parameters:
cidstringThe actual transmitted string.
numberThe cid number is returned here.
flagsThe cid flags are returned here. This function parses DTMF callerid.

Definition at line 198 of file callerid.c.

References ast_debug, ast_log(), CID_PRIVATE_NUMBER, CID_UNKNOWN_NUMBER, and LOG_WARNING.

Referenced by ss_thread().

{
   int i;
   int code;

   /* "Clear" the number-buffer. */
   number[0] = 0;

   if (strlen(cidstring) < 2) {
      ast_debug(1, "No cid detected\n");
      *flags = CID_UNKNOWN_NUMBER;
      return;
   }
   
   /* Detect protocol and special types */
   if (cidstring[0] == 'B') {
      /* Handle special codes */
      code = atoi(&cidstring[1]);
      if (code == 0)
         *flags = CID_UNKNOWN_NUMBER;
      else if (code == 10) 
         *flags = CID_PRIVATE_NUMBER;
      else
         ast_debug(1, "Unknown DTMF code %d\n", code);
   } else if (cidstring[0] == 'D' && cidstring[2] == '#') {
      /* .DK special code */
      if (cidstring[1] == '1')
         *flags = CID_PRIVATE_NUMBER;
      if (cidstring[1] == '2' || cidstring[1] == '3')
         *flags = CID_UNKNOWN_NUMBER;
   } else if (cidstring[0] == 'D' || cidstring[0] == 'A') {
      /* "Standard" callerid */
      for (i = 1; i < strlen(cidstring); i++) {
         if (cidstring[i] == 'C' || cidstring[i] == '#')
            break;
         if (isdigit(cidstring[i]))
            number[i-1] = cidstring[i];
         else
            ast_debug(1, "Unknown CID digit '%c'\n",
               cidstring[i]);
      }
      number[i-1] = 0;
   } else if (isdigit(cidstring[0])) {
      /* It begins with a digit, so we parse it as a number and hope
       * for the best */
      ast_log(LOG_WARNING, "Couldn't detect start-character. CID "
         "parsing might be unreliable\n");
      for (i = 0; i < strlen(cidstring); i++) {
         if (isdigit(cidstring[i]))
            number[i] = cidstring[i];
         else
            break;
      }
      number[i] = 0;
   } else {
      ast_debug(1, "Unknown CID protocol, start digit '%c'\n", cidstring[0]);
      *flags = CID_UNKNOWN_NUMBER;
   }
}
void callerid_init ( void  )

Initialize stuff for inverse FFT.

CallerID Initialization.

Definition at line 112 of file callerid.c.

References CALLERID_MARK, CALLERID_SPACE, CAS_FREQ1, CAS_FREQ2, cos, and SAS_FREQ.

Referenced by main().

{
   cid_dr[0] = cos(CALLERID_SPACE * 2.0 * M_PI / 8000.0);
   cid_di[0] = sin(CALLERID_SPACE * 2.0 * M_PI / 8000.0);
   cid_dr[1] = cos(CALLERID_MARK * 2.0 * M_PI / 8000.0);
   cid_di[1] = sin(CALLERID_MARK * 2.0 * M_PI / 8000.0);
   sasdr = cos(SAS_FREQ * 2.0 * M_PI / 8000.0);
   sasdi = sin(SAS_FREQ * 2.0 * M_PI / 8000.0);
   casdr1 = cos(CAS_FREQ1 * 2.0 * M_PI / 8000.0);
   casdi1 = sin(CAS_FREQ1 * 2.0 * M_PI / 8000.0);
   casdr2 = cos(CAS_FREQ2 * 2.0 * M_PI / 8000.0);
   casdi2 = sin(CAS_FREQ2 * 2.0 * M_PI / 8000.0);
}
struct callerid_state* callerid_new ( int  cid_signalling) [read]

Create a callerID state machine.

Parameters:
cid_signallingType of signalling in use

This function returns a malloc'd instance of the callerid_state data structure.

Returns:
Returns a pointer to a malloc'd callerid_state structure, or NULL on error.

Definition at line 126 of file callerid.c.

References ast_calloc, fsk_data::bw, CID_UNKNOWN_NAME, CID_UNKNOWN_NUMBER, fsk_data::f_mark_idx, fsk_data::f_space_idx, callerid_state::flags, callerid_state::fskd, fskmodem_init(), fsk_data::icont, fsk_data::instop, fsk_data::ispb, fsk_data::nbit, fsk_data::nstop, fsk_data::pllids, fsk_data::pllispb, fsk_data::pllispb2, and fsk_data::spb.

Referenced by mwi_thread(), and ss_thread().

{
   struct callerid_state *cid;

   if ((cid = ast_calloc(1, sizeof(*cid)))) {
#ifdef INTEGER_CALLERID
      cid->fskd.ispb = 7;           /* 1200 baud */   
      /* Set up for 1200 / 8000 freq *32 to allow ints */
      cid->fskd.pllispb  = (int)(8000 * 32  / 1200);
      cid->fskd.pllids   = cid->fskd.pllispb/32;
      cid->fskd.pllispb2 = cid->fskd.pllispb/2;
      
      cid->fskd.icont = 0;           /* PLL REset */
      /* cid->fskd.hdlc = 0; */        /* Async */
      cid->fskd.nbit = 8;              /* 8 bits */
      cid->fskd.instop = 1;         /* 1 stop bit */
      /* cid->fskd.paridad = 0; */     /* No parity */
      cid->fskd.bw = 1;                /* Filter 800 Hz */
      if (cid_signalling == 2) {       /* v23 signalling */
         cid->fskd.f_mark_idx  = 4; /* 1300 Hz */
         cid->fskd.f_space_idx = 5; /* 2100 Hz */
      } else {                         /* Bell 202 signalling as default */
         cid->fskd.f_mark_idx  = 2; /* 1200 Hz */
         cid->fskd.f_space_idx = 3; /* 2200 Hz */
      }
      /* cid->fskd.pcola = 0; */       /* No clue */
      /* cid->fskd.cont = 0.0; */      /* Digital PLL reset */
      /* cid->fskd.x0 = 0.0; */
      /* cid->fskd.state = 0; */
      cid->flags = CID_UNKNOWN_NAME | CID_UNKNOWN_NUMBER;
      /* cid->pos = 0; */

      fskmodem_init(&cid->fskd);
#else
      cid->fskd.spb = 7.0;             /* 1200 baud */
      /* cid->fskd.hdlc = 0; */        /* Async */
      cid->fskd.nbit = 8;              /* 8 bits */
      cid->fskd.nstop = 1.0;           /* 1 stop bit */
      /* cid->fskd.paridad = 0; */     /* No parity */
      cid->fskd.bw = 1;                /* Filter 800 Hz */
      if (cid_signalling == 2) {       /* v23 signalling */
         cid->fskd.f_mark_idx =  4; /* 1300 Hz */
         cid->fskd.f_space_idx = 5; /* 2100 Hz */
      } else {                         /* Bell 202 signalling as default */
         cid->fskd.f_mark_idx =  2; /* 1200 Hz */
         cid->fskd.f_space_idx = 3; /* 2200 Hz */
      }
      /* cid->fskd.pcola = 0; */       /* No clue */
      /* cid->fskd.cont = 0.0; */      /* Digital PLL reset */
      /* cid->fskd.x0 = 0.0; */
      /* cid->fskd.state = 0; */
      cid->flags = CID_UNKNOWN_NAME | CID_UNKNOWN_NUMBER;
      /* cid->pos = 0; */
#endif
   }

   return cid;
}
static void gen_tone ( unsigned char *  buf,
int  len,
int  codec,
float  ddr1,
float  ddi1,
float *  cr1,
float *  ci1 
) [inline, static]

Definition at line 96 of file callerid.c.

References AST_LIN2X, and len().

Referenced by ast_gen_cas().

{
   int x;
   float t;
   for (x = 0; x < len; x++) {
      t = *cr1 * ddr1 - *ci1 * ddi1;
      *ci1 = *cr1 * ddi1 + *ci1 * ddr1;
      *cr1 = t;
      t = 2.0 - (*cr1 * *cr1 + *ci1 * *ci1);
      *cr1 *= t;
      *ci1 *= t;  
      buf[x] = AST_LIN2X(*cr1 * 8192.0);
   }
}
static void gen_tones ( unsigned char *  buf,
int  len,
int  codec,
float  ddr1,
float  ddi1,
float  ddr2,
float  ddi2,
float *  cr1,
float *  ci1,
float *  cr2,
float *  ci2 
) [inline, static]

Definition at line 74 of file callerid.c.

References AST_LIN2X, and len().

Referenced by ast_gen_cas().

{
   int x;
   float t;
   for (x = 0; x < len; x++) {
      t = *cr1 * ddr1 - *ci1 * ddi1;
      *ci1 = *cr1 * ddi1 + *ci1 * ddr1;
      *cr1 = t;
      t = 2.0 - (*cr1 * *cr1 + *ci1 * *ci1);
      *cr1 *= t;
      *ci1 *= t;  

      t = *cr2 * ddr2 - *ci2 * ddi2;
      *ci2 = *cr2 * ddi2 + *ci2 * ddr2;
      *cr2 = t;
      t = 2.0 - (*cr2 * *cr2 + *ci2 * *ci2);
      *cr2 *= t;
      *ci2 *= t;  
      buf[x] = AST_LIN2X((*cr1 + *cr2) * 2048.0);
   }
}
int vmwi_generate ( unsigned char *  buf,
int  active,
int  type,
int  codec,
const char *  name,
const char *  number,
int  flags 
)

Generate message waiting indicator.

Parameters:
activeThe message indicator state -- either 0 no messages in mailbox or 1 messages in mailbox
typeFormat of message (any of CID_MWI_TYPE_*)
See also:
callerid_generate() for more info as it use the same encoding
Version:
1.6.1 changed mdmf parameter to type, added name, number and flags for caller id message generation

Definition at line 794 of file callerid.c.

References callerid_genmsg(), CID_MWI_TYPE_MDMF, CID_MWI_TYPE_MDMF_FULL, len(), msg, PUT_BYTE, PUT_CLID, and PUT_CLID_MARKMS.

Referenced by mwi_send_init().

{
   char msg[256];
   int len = 0;
   int sum;
   int x;
   int bytes = 0;
   float cr = 1.0;
   float ci = 0.0;
   float scont = 0.0;
   
   if (type == CID_MWI_TYPE_MDMF_FULL) {
      /* MDMF Message waiting with date, number, name and MWI parameter */
      msg[0] = 0x82;

      /* put date, number info at the right place */
      len = callerid_genmsg(msg+2, sizeof(msg)-2, number, name, flags); 
      
      /* length of MDMF CLI plus Message Waiting Structure */
      msg[1] = len+3;
      
      /* Go to the position to write to */
      len = len+2;
      
      /* "Message Waiting Parameter" */
      msg[len++] = 0x0b;
      /* Length of IE is one */
      msg[len++] = 1;
      /* Active or not */
      if (active)
         msg[len++] = 0xff;
      else
         msg[len++] = 0x00;
      
   } else if (type == CID_MWI_TYPE_MDMF) {
      /* MDMF Message waiting only */
      /* same as above except that the we only put MWI parameter */
      msg[len++] = 0x82;
      /* Length is 3 */
      msg[len++] = 3;
      /* IE is "Message Waiting Parameter" */
      msg[len++] = 0x0b;
      /* Length of IE is one */
      msg[len++] = 1;
      /* Active or not */
      if (active)
         msg[len++] = 0xff;
      else
         msg[len++] = 0x00;
   } else {
      /* SDMF Message waiting */
      msg[len++] = 0x6;
      /* Length is 3 */
      msg[len++] = 3;
      if (active) {
         msg[len++] = 0x42;
         msg[len++] = 0x42;
         msg[len++] = 0x42;
      } else {
         msg[len++] = 0x6f;
         msg[len++] = 0x6f;
         msg[len++] = 0x6f;
      }
   }
   sum = 0;
   for (x = 0; x < len; x++)
      sum += msg[x];
   sum = (256 - (sum & 255));
   msg[len++] = sum;
   /* Wait a half a second */
   for (x = 0; x < 4000; x++)
      PUT_BYTE(0x7f);
   /* Transmit 30 0x55's (looks like a square wave) for channel seizure */
   for (x = 0; x < 30; x++)
      PUT_CLID(0x55);
   /* Send 170ms of callerid marks */
   for (x = 0; x < 170; x++)
      PUT_CLID_MARKMS;
   for (x = 0; x < len; x++) {
      PUT_CLID(msg[x]);
   }
   /* Send 50 more ms of marks */
   for (x = 0; x < 50; x++)
      PUT_CLID_MARKMS;
   return bytes;
}

Variable Documentation

float casdi1

Definition at line 64 of file callerid.c.

float casdi2

Definition at line 64 of file callerid.c.

float casdr1

Definition at line 64 of file callerid.c.

float casdr2

Definition at line 64 of file callerid.c.

float cid_di[4]

Definition at line 61 of file callerid.c.

Referenced by callerid_getcarrier().

float cid_dr[4]

Definition at line 61 of file callerid.c.

Referenced by callerid_getcarrier().

float clidsb = 8000.0 / 1200.0

Definition at line 62 of file callerid.c.

const char* name

Definition at line 1111 of file callerid.c.

float sasdi

Definition at line 63 of file callerid.c.

float sasdr

Definition at line 63 of file callerid.c.