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668 lines
16 KiB
668 lines
16 KiB
/*
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* Asterisk -- A telephony toolkit for Linux.
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*
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* CallerID Generation support
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*
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* Copyright (C) 2001-2004, Digium, Inc.
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*
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* Mark Spencer <markster@digium.com>
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License.
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*
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* Includes code and algorithms from the Zapata library.
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*
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*/
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#include <time.h>
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <math.h>
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#include <ctype.h>
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#include <asterisk/ulaw.h>
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#include <asterisk/alaw.h>
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#include <asterisk/frame.h>
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#include <asterisk/callerid.h>
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#include <asterisk/logger.h>
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#include <asterisk/fskmodem.h>
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#include <asterisk/utils.h>
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struct callerid_state {
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fsk_data fskd;
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char rawdata[256];
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short oldstuff[160];
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int oldlen;
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int pos;
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int type;
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int cksum;
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char name[64];
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char number[64];
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int flags;
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int sawflag;
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int len;
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};
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float cid_dr[4], cid_di[4];
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float clidsb = 8000.0 / 1200.0;
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float sasdr, sasdi;
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float casdr1, casdi1, casdr2, casdi2;
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#define CALLERID_SPACE 2200.0 /* 2200 hz for "0" */
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#define CALLERID_MARK 1200.0 /* 1200 hz for "1" */
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#define SAS_FREQ 440.0
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#define CAS_FREQ1 2130.0
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#define CAS_FREQ2 2750.0
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static inline 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)
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{
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int x;
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float t;
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for (x=0;x<len;x++) {
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t = *cr1 * ddr1 - *ci1 * ddi1;
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*ci1 = *cr1 * ddi1 + *ci1 * ddr1;
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*cr1 = t;
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t = 2.0 - (*cr1 * *cr1 + *ci1 * *ci1);
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*cr1 *= t;
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*ci1 *= t;
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t = *cr2 * ddr2 - *ci2 * ddi2;
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*ci2 = *cr2 * ddi2 + *ci2 * ddr2;
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*cr2 = t;
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t = 2.0 - (*cr2 * *cr2 + *ci2 * *ci2);
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*cr2 *= t;
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*ci2 *= t;
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buf[x] = AST_LIN2X((*cr1 + *cr2) * 2048.0);
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}
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}
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static inline void gen_tone(unsigned char *buf, int len, int codec, float ddr1, float ddi1, float *cr1, float *ci1)
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{
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int x;
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float t;
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for (x=0;x<len;x++) {
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t = *cr1 * ddr1 - *ci1 * ddi1;
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*ci1 = *cr1 * ddi1 + *ci1 * ddr1;
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*cr1 = t;
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t = 2.0 - (*cr1 * *cr1 + *ci1 * *ci1);
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*cr1 *= t;
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*ci1 *= t;
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buf[x] = AST_LIN2X(*cr1 * 8192.0);
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}
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}
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void callerid_init(void)
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{
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/* Initialize stuff for inverse FFT */
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cid_dr[0] = cos(CALLERID_SPACE * 2.0 * M_PI / 8000.0);
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cid_di[0] = sin(CALLERID_SPACE * 2.0 * M_PI / 8000.0);
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cid_dr[1] = cos(CALLERID_MARK * 2.0 * M_PI / 8000.0);
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cid_di[1] = sin(CALLERID_MARK * 2.0 * M_PI / 8000.0);
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sasdr = cos(SAS_FREQ * 2.0 * M_PI / 8000.0);
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sasdi = sin(SAS_FREQ * 2.0 * M_PI / 8000.0);
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casdr1 = cos(CAS_FREQ1 * 2.0 * M_PI / 8000.0);
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casdi1 = sin(CAS_FREQ1 * 2.0 * M_PI / 8000.0);
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casdr2 = cos(CAS_FREQ2 * 2.0 * M_PI / 8000.0);
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casdi2 = sin(CAS_FREQ2 * 2.0 * M_PI / 8000.0);
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}
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struct callerid_state *callerid_new(int cid_signalling)
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{
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struct callerid_state *cid;
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cid = malloc(sizeof(struct callerid_state));
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if (cid) {
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memset(cid, 0, sizeof(struct callerid_state));
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cid->fskd.spb = 7; /* 1200 baud */
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cid->fskd.hdlc = 0; /* Async */
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cid->fskd.nbit = 8; /* 8 bits */
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cid->fskd.nstop = 1; /* 1 stop bit */
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cid->fskd.paridad = 0; /* No parity */
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cid->fskd.bw=1; /* Filter 800 Hz */
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if (cid_signalling == 2) { /* v23 signalling */
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cid->fskd.f_mark_idx = 4; /* 1300 Hz */
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cid->fskd.f_space_idx = 5; /* 2100 Hz */
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} else { /* Bell 202 signalling as default */
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cid->fskd.f_mark_idx = 2; /* 1200 Hz */
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cid->fskd.f_space_idx = 3; /* 2200 Hz */
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}
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cid->fskd.pcola = 0; /* No clue */
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cid->fskd.cont = 0; /* Digital PLL reset */
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cid->fskd.x0 = 0.0;
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cid->fskd.state = 0;
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memset(cid->name, 0, sizeof(cid->name));
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memset(cid->number, 0, sizeof(cid->number));
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cid->flags = CID_UNKNOWN_NAME | CID_UNKNOWN_NUMBER;
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cid->pos = 0;
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} else
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ast_log(LOG_WARNING, "Out of memory\n");
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return cid;
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}
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void callerid_get(struct callerid_state *cid, char **name, char **number, int *flags)
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{
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*flags = cid->flags;
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if (cid->flags & (CID_UNKNOWN_NAME | CID_PRIVATE_NUMBER))
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*name = NULL;
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else
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*name = cid->name;
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if (cid->flags & (CID_UNKNOWN_NUMBER | CID_PRIVATE_NUMBER))
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*number = NULL;
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else
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*number = cid->number;
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}
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void callerid_get_dtmf(char *cidstring, char *number, int *flags)
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{
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int i;
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int code;
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/* "Clear" the number-buffer. */
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number[0] = 0;
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if (strlen(cidstring) < 2) {
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ast_log(LOG_DEBUG, "No cid detected\n");
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*flags = CID_UNKNOWN_NUMBER;
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return;
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}
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/* Detect protocol and special types */
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if (cidstring[0] == 'B') {
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/* Handle special codes */
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code = atoi(&cidstring[1]);
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if (code == 0)
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*flags = CID_UNKNOWN_NUMBER;
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else if (code == 10)
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*flags = CID_PRIVATE_NUMBER;
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else
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ast_log(LOG_DEBUG, "Unknown DTMF code %d\n", code);
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} else if (cidstring[0] == 'D' && cidstring[2] == '#') {
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/* .DK special code */
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if (cidstring[1] == '1')
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*flags = CID_PRIVATE_NUMBER;
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if (cidstring[1] == '2' || cidstring[1] == '3')
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*flags = CID_UNKNOWN_NUMBER;
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} else if (cidstring[0] == 'D' || cidstring[0] == 'A') {
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/* "Standard" callerid */
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for (i = 1; i < strlen(cidstring); i++ ) {
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if (cidstring[i] == 'C' || cidstring[i] == '#')
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break;
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if (isdigit(cidstring[i]))
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number[i-1] = cidstring[i];
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else
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ast_log(LOG_DEBUG, "Unknown CID digit '%c'\n",
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cidstring[i]);
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}
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number[i-1] = 0;
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} else if (isdigit(cidstring[0])) {
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/* It begins with a digit, so we parse it as a number and hope
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* for the best */
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ast_log(LOG_WARNING, "Couldn't detect start-character. CID "
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"parsing might be unreliable\n");
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for (i = 0; i < strlen(cidstring); i++) {
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if (isdigit(cidstring[i]))
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number[i] = cidstring[i];
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else
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break;
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}
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number[i] = 0;
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} else {
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ast_log(LOG_DEBUG, "Unknown CID protocol, start digit '%c'\n",
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cidstring[0]);
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*flags = CID_UNKNOWN_NUMBER;
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}
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}
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int ast_gen_cas(unsigned char *outbuf, int sendsas, int len, int codec)
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{
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int pos = 0;
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int saslen=2400;
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float cr1 = 1.0;
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float ci1 = 0.0;
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float cr2 = 1.0;
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float ci2 = 0.0;
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if (sendsas) {
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if (len < saslen)
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return -1;
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gen_tone(outbuf, saslen, codec, sasdr, sasdi, &cr1, &ci1);
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len -= saslen;
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pos += saslen;
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cr2 = cr1;
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ci2 = ci1;
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}
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gen_tones(outbuf + pos, len, codec, casdr1, casdi1, casdr2, casdi2, &cr1, &ci1, &cr2, &ci2);
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return 0;
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}
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int callerid_feed(struct callerid_state *cid, unsigned char *ubuf, int len, int codec)
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{
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int mylen = len;
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int olen;
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int b = 'X';
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int res;
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int x;
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short *buf = malloc(2 * len + cid->oldlen);
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short *obuf = buf;
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if (!buf) {
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ast_log(LOG_WARNING, "Out of memory\n");
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return -1;
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}
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memset(buf, 0, 2 * len + cid->oldlen);
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memcpy(buf, cid->oldstuff, cid->oldlen);
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mylen += cid->oldlen/2;
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for (x=0;x<len;x++)
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buf[x+cid->oldlen/2] = AST_XLAW(ubuf[x]);
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while(mylen >= 160) {
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olen = mylen;
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res = fsk_serie(&cid->fskd, buf, &mylen, &b);
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if (mylen < 0) {
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ast_log(LOG_ERROR, "fsk_serie made mylen < 0 (%d)\n", mylen);
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return -1;
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}
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buf += (olen - mylen);
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if (res < 0) {
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ast_log(LOG_NOTICE, "fsk_serie failed\n");
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return -1;
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}
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if (res == 1) {
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/* Ignore invalid bytes */
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if (b > 0xff)
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continue;
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switch(cid->sawflag) {
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case 0: /* Look for flag */
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if (b == 'U')
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cid->sawflag = 2;
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break;
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case 2: /* Get lead-in */
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if ((b == 0x04) || (b == 0x80)) {
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cid->type = b;
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cid->sawflag = 3;
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cid->cksum = b;
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}
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break;
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case 3: /* Get length */
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/* Not a lead in. We're ready */
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cid->sawflag = 4;
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cid->len = b;
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cid->pos = 0;
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cid->cksum += b;
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break;
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case 4: /* Retrieve message */
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if (cid->pos >= 128) {
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ast_log(LOG_WARNING, "Caller ID too long???\n");
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return -1;
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}
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cid->rawdata[cid->pos++] = b;
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cid->len--;
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cid->cksum += b;
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if (!cid->len) {
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cid->rawdata[cid->pos] = '\0';
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cid->sawflag = 5;
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}
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break;
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case 5: /* Check checksum */
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if (b != (256 - (cid->cksum & 0xff))) {
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ast_log(LOG_NOTICE, "Caller*ID failed checksum\n");
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/* Try again */
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cid->sawflag = 0;
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break;
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}
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cid->number[0] = '\0';
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cid->name[0] = '\0';
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/* If we get this far we're fine. */
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if (cid->type == 0x80) {
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/* MDMF */
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/* Go through each element and process */
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for (x=0;x< cid->pos;) {
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switch(cid->rawdata[x++]) {
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case 1:
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/* Date */
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break;
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case 2: /* Number */
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case 3: /* Number (for Zebble) */
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case 4: /* Number */
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res = cid->rawdata[x];
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if (res > 32) {
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ast_log(LOG_NOTICE, "Truncating long caller ID number from %d bytes to 32\n", cid->rawdata[x]);
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res = 32;
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}
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if (ast_strlen_zero(cid->number)) {
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memcpy(cid->number, cid->rawdata + x + 1, res);
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/* Null terminate */
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cid->number[res] = '\0';
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}
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break;
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case 6: /* Stentor Call Qualifier (ie. Long Distance call) */
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break;
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case 7: /* Name */
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case 8: /* Name */
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res = cid->rawdata[x];
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if (res > 32) {
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ast_log(LOG_NOTICE, "Truncating long caller ID name from %d bytes to 32\n", cid->rawdata[x]);
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res = 32;
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}
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memcpy(cid->name, cid->rawdata + x + 1, res);
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cid->name[res] = '\0';
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break;
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case 17: /* UK: Call type, 1=Voice Call, 2=Ringback when free, 129=Message waiting */
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case 19: /* UK: Network message system status (Number of messages waiting) */
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case 22: /* Something French */
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break;
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default:
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ast_log(LOG_NOTICE, "Unknown IE %d\n", cid->rawdata[x-1]);
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}
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x += cid->rawdata[x];
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x++;
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}
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} else {
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/* SDMF */
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strncpy(cid->number, cid->rawdata + 8, sizeof(cid->number)-1);
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}
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/* Update flags */
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cid->flags = 0;
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if (!strcmp(cid->number, "P")) {
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strcpy(cid->number, "");
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cid->flags |= CID_PRIVATE_NUMBER;
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} else if (!strcmp(cid->number, "O") || ast_strlen_zero(cid->number)) {
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strcpy(cid->number, "");
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cid->flags |= CID_UNKNOWN_NUMBER;
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}
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if (!strcmp(cid->name, "P")) {
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strcpy(cid->name, "");
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cid->flags |= CID_PRIVATE_NAME;
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} else if (!strcmp(cid->name, "O") || ast_strlen_zero(cid->name)) {
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strcpy(cid->name, "");
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cid->flags |= CID_UNKNOWN_NAME;
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}
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return 1;
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break;
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default:
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ast_log(LOG_ERROR, "Dunno what to do with a digit in sawflag %d\n", cid->sawflag);
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}
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}
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}
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if (mylen) {
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memcpy(cid->oldstuff, buf, mylen * 2);
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cid->oldlen = mylen * 2;
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} else
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cid->oldlen = 0;
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free(obuf);
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return 0;
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}
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void callerid_free(struct callerid_state *cid)
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{
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free(cid);
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}
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static int callerid_genmsg(char *msg, int size, char *number, char *name, int flags)
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{
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time_t t;
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struct tm tm;
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char *ptr;
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int res;
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int i,x;
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/* Get the time */
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time(&t);
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localtime_r(&t,&tm);
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ptr = msg;
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/* Format time and message header */
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res = snprintf(ptr, size, "\001\010%02d%02d%02d%02d", tm.tm_mon + 1,
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tm.tm_mday, tm.tm_hour, tm.tm_min);
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size -= res;
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ptr += res;
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if (!number || ast_strlen_zero(number) || (flags & CID_UNKNOWN_NUMBER)) {
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/* Indicate number not known */
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res = snprintf(ptr, size, "\004\001O");
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size -= res;
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ptr += res;
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} else if (flags & CID_PRIVATE_NUMBER) {
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/* Indicate number is private */
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res = snprintf(ptr, size, "\004\001P");
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size -= res;
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ptr += res;
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} else {
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/* Send up to 16 digits of number MAX */
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i = strlen(number);
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if (i > 16) i = 16;
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res = snprintf(ptr, size, "\002%c", i);
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size -= res;
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ptr += res;
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for (x=0;x<i;x++)
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ptr[x] = number[x];
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ptr[i] = '\0';
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ptr += i;
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size -= i;
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}
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if (!name || ast_strlen_zero(name) || (flags & CID_UNKNOWN_NAME)) {
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/* Indicate name not known */
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res = snprintf(ptr, size, "\010\001O");
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size -= res;
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ptr += res;
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} else if (flags & CID_PRIVATE_NAME) {
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/* Indicate name is private */
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res = snprintf(ptr, size, "\010\001P");
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size -= res;
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ptr += res;
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} else {
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/* Send up to 16 digits of name MAX */
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i = strlen(name);
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if (i > 16) i = 16;
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res = snprintf(ptr, size, "\007%c", i);
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size -= res;
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ptr += res;
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for (x=0;x<i;x++)
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ptr[x] = name[x];
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ptr[i] = '\0';
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ptr += i;
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size -= i;
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}
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return (ptr - msg);
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}
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int vmwi_generate(unsigned char *buf, int active, int mdmf, int codec)
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{
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unsigned char msg[256];
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int len=0;
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int sum;
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int x;
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int bytes = 0;
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float cr = 1.0;
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float ci = 0.0;
|
|
float scont = 0.0;
|
|
if (mdmf) {
|
|
/* MDMF Message waiting */
|
|
msg[len++] = 0x82;
|
|
/* Length is 3 */
|
|
msg[len++] = 3;
|
|
/* IE is "Message Waiting Parameter" */
|
|
msg[len++] = 0xb;
|
|
/* 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;
|
|
}
|
|
|
|
int callerid_generate(unsigned char *buf, char *number, char *name, int flags, int callwaiting, int codec)
|
|
{
|
|
int bytes=0;
|
|
int x, sum;
|
|
int len;
|
|
/* Initial carriers (real/imaginary) */
|
|
float cr = 1.0;
|
|
float ci = 0.0;
|
|
float scont = 0.0;
|
|
unsigned 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;
|
|
}
|
|
|
|
void ast_shrink_phone_number(char *n)
|
|
{
|
|
int x,y=0;
|
|
for (x=0;n[x];x++)
|
|
if (!strchr("( )-.", n[x]))
|
|
n[y++] = n[x];
|
|
n[y] = '\0';
|
|
}
|
|
|
|
int ast_isphonenumber(char *n)
|
|
{
|
|
int x;
|
|
if (!n || ast_strlen_zero(n))
|
|
return 0;
|
|
for (x=0;n[x];x++)
|
|
if (!strchr("0123456789*#+", n[x]))
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
int ast_callerid_parse(char *instr, char **name, char **location)
|
|
{
|
|
char *ns, *ne;
|
|
char *ls, *le;
|
|
char tmp[256];
|
|
/* Try for "name" <location> format or
|
|
name <location> format */
|
|
if ((ls = strchr(instr, '<')) && (le = strchr(ls, '>'))) {
|
|
/* Found the location */
|
|
*le = '\0';
|
|
*ls = '\0';
|
|
*location = ls + 1;
|
|
if ((ns = strchr(instr, '\"')) && (ne = strchr(ns + 1, '\"'))) {
|
|
/* Get name out of quotes */
|
|
*ns = '\0';
|
|
*ne = '\0';
|
|
*name = ns + 1;
|
|
return 0;
|
|
} else {
|
|
/* Just trim off any trailing spaces */
|
|
*name = instr;
|
|
while(!ast_strlen_zero(instr) && (instr[strlen(instr) - 1] < 33))
|
|
instr[strlen(instr) - 1] = '\0';
|
|
/* And leading spaces */
|
|
while(**name && (**name < 33))
|
|
(*name)++;
|
|
return 0;
|
|
}
|
|
} else {
|
|
strncpy(tmp, instr, sizeof(tmp)-1);
|
|
ast_shrink_phone_number(tmp);
|
|
if (ast_isphonenumber(tmp)) {
|
|
/* Assume it's just a location */
|
|
*name = NULL;
|
|
*location = instr;
|
|
} else {
|
|
/* Assume it's just a name. Make sure it's not quoted though */
|
|
*name = instr;
|
|
while(*(*name) && ((*(*name) < 33) || (*(*name) == '\"'))) (*name)++;
|
|
ne = *name + strlen(*name) - 1;
|
|
while((ne > *name) && ((*ne < 33) || (*ne == '\"'))) { *ne = '\0'; ne--; }
|
|
*location = NULL;
|
|
}
|
|
return 0;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
static int __ast_callerid_generate(unsigned char *buf, char *callerid, int callwaiting, int codec)
|
|
{
|
|
char tmp[256];
|
|
char *n, *l;
|
|
if (!callerid)
|
|
return callerid_generate(buf, NULL, NULL, 0, callwaiting, codec);
|
|
strncpy(tmp, callerid, sizeof(tmp)-1);
|
|
if (ast_callerid_parse(tmp, &n, &l)) {
|
|
ast_log(LOG_WARNING, "Unable to parse '%s' into CallerID name & number\n", callerid);
|
|
return callerid_generate(buf, NULL, NULL, 0, callwaiting, codec);
|
|
}
|
|
if (l)
|
|
ast_shrink_phone_number(l);
|
|
if (!ast_isphonenumber(l))
|
|
return callerid_generate(buf, NULL, n, 0, callwaiting, codec);
|
|
return callerid_generate(buf, l, n, 0, callwaiting, codec);
|
|
}
|
|
|
|
int ast_callerid_generate(unsigned char *buf, char *callerid, int codec)
|
|
{
|
|
return __ast_callerid_generate(buf, callerid, 0, codec);
|
|
}
|
|
|
|
int ast_callerid_callwaiting_generate(unsigned char *buf, char *callerid, int codec)
|
|
{
|
|
return __ast_callerid_generate(buf, callerid, 1, codec);
|
|
}
|