callerid.c Source File

00001 /*
00002  * Asterisk -- A telephony toolkit for Linux.
00003  *
00004  * CallerID Generation support 
00005  * 
00006  * Copyright (C) 2001-2004, Digium, Inc.
00007  *
00008  * Mark Spencer <markster@digium.com>
00009  *
00010  * This program is free software, distributed under the terms of
00011  * the GNU General Public License.
00012  *
00013  * Includes code and algorithms from the Zapata library.
00014  *
00015  */
00016 
00017 #include <time.h>
00018 #include <string.h>
00019 #include <stdio.h>
00020 #include <stdlib.h>
00021 #include <unistd.h>
00022 #include <math.h>
00023 #include <ctype.h>
00024 #include <asterisk/ulaw.h>
00025 #include <asterisk/alaw.h>
00026 #include <asterisk/frame.h>
00027 #include <asterisk/callerid.h>
00028 #include <asterisk/logger.h>
00029 #include <asterisk/fskmodem.h>
00030 #include <asterisk/utils.h>
00031 
00032 struct callerid_state {
00033    fsk_data fskd;
00034    char rawdata[256];
00035    short oldstuff[160];
00036    int oldlen;
00037    int pos;
00038    int type;
00039    int cksum;
00040    char name[64];
00041    char number[64];
00042    int flags;
00043    int sawflag;
00044    int len;
00045 };
00046 
00047 
00048 float cid_dr[4], cid_di[4];
00049 float clidsb = 8000.0 / 1200.0;
00050 float sasdr, sasdi;
00051 float casdr1, casdi1, casdr2, casdi2;
00052 
00053 #define CALLERID_SPACE  2200.0      /* 2200 hz for "0" */
00054 #define CALLERID_MARK   1200.0      /* 1200 hz for "1" */
00055 #define SAS_FREQ      440.0
00056 #define CAS_FREQ1    2130.0
00057 #define CAS_FREQ2    2750.0
00058 
00059 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)
00060 {
00061    int x;
00062    float t;
00063    for (x=0;x<len;x++) {
00064       t = *cr1 * ddr1 - *ci1 * ddi1;
00065       *ci1 = *cr1 * ddi1 + *ci1 * ddr1;
00066       *cr1 = t;
00067       t = 2.0 - (*cr1 * *cr1 + *ci1 * *ci1);
00068       *cr1 *= t;
00069       *ci1 *= t;  
00070 
00071       t = *cr2 * ddr2 - *ci2 * ddi2;
00072       *ci2 = *cr2 * ddi2 + *ci2 * ddr2;
00073       *cr2 = t;
00074       t = 2.0 - (*cr2 * *cr2 + *ci2 * *ci2);
00075       *cr2 *= t;
00076       *ci2 *= t;  
00077       buf[x] = AST_LIN2X((*cr1 + *cr2) * 2048.0);
00078    }
00079 }
00080 
00081 static inline void gen_tone(unsigned char *buf, int len, int codec, float ddr1, float ddi1, float *cr1, float *ci1)
00082 {
00083    int x;
00084    float t;
00085    for (x=0;x<len;x++) {
00086       t = *cr1 * ddr1 - *ci1 * ddi1;
00087       *ci1 = *cr1 * ddi1 + *ci1 * ddr1;
00088       *cr1 = t;
00089       t = 2.0 - (*cr1 * *cr1 + *ci1 * *ci1);
00090       *cr1 *= t;
00091       *ci1 *= t;  
00092       buf[x] = AST_LIN2X(*cr1 * 8192.0);
00093    }
00094 }
00095 
00096 void callerid_init(void)
00097 {
00098    /* Initialize stuff for inverse FFT */
00099    cid_dr[0] = cos(CALLERID_SPACE * 2.0 * M_PI / 8000.0);
00100    cid_di[0] = sin(CALLERID_SPACE * 2.0 * M_PI / 8000.0);
00101    cid_dr[1] = cos(CALLERID_MARK * 2.0 * M_PI / 8000.0);
00102    cid_di[1] = sin(CALLERID_MARK * 2.0 * M_PI / 8000.0);
00103    sasdr = cos(SAS_FREQ * 2.0 * M_PI / 8000.0);
00104    sasdi = sin(SAS_FREQ * 2.0 * M_PI / 8000.0);
00105    casdr1 = cos(CAS_FREQ1 * 2.0 * M_PI / 8000.0);
00106    casdi1 = sin(CAS_FREQ1 * 2.0 * M_PI / 8000.0);
00107    casdr2 = cos(CAS_FREQ2 * 2.0 * M_PI / 8000.0);
00108    casdi2 = sin(CAS_FREQ2 * 2.0 * M_PI / 8000.0);
00109 }
00110 
00111 struct callerid_state *callerid_new(int cid_signalling)
00112 {
00113    struct callerid_state *cid;
00114    cid = malloc(sizeof(struct callerid_state));
00115    if (cid) {
00116       memset(cid, 0, sizeof(struct callerid_state));
00117       cid->fskd.spb = 7;      /* 1200 baud */
00118       cid->fskd.hdlc = 0;     /* Async */
00119       cid->fskd.nbit = 8;     /* 8 bits */
00120       cid->fskd.nstop = 1; /* 1 stop bit */
00121       cid->fskd.paridad = 0;  /* No parity */
00122       cid->fskd.bw=1;         /* Filter 800 Hz */
00123       if (cid_signalling == 2) { /* v23 signalling */
00124          cid->fskd.f_mark_idx =  4; /* 1300 Hz */
00125          cid->fskd.f_space_idx = 5; /* 2100 Hz */
00126       } else { /* Bell 202 signalling as default */ 
00127          cid->fskd.f_mark_idx =  2; /* 1200 Hz */
00128          cid->fskd.f_space_idx = 3; /* 2200 Hz */
00129       }
00130       cid->fskd.pcola = 0;    /* No clue */
00131       cid->fskd.cont = 0;        /* Digital PLL reset */
00132       cid->fskd.x0 = 0.0;
00133       cid->fskd.state = 0;
00134       memset(cid->name, 0, sizeof(cid->name));
00135       memset(cid->number, 0, sizeof(cid->number));
00136       cid->flags = CID_UNKNOWN_NAME | CID_UNKNOWN_NUMBER;
00137       cid->pos = 0;
00138    } else
00139       ast_log(LOG_WARNING, "Out of memory\n");
00140    return cid;
00141 }
00142 
00143 void callerid_get(struct callerid_state *cid, char **name, char **number, int *flags)
00144 {
00145    *flags = cid->flags;
00146    if (cid->flags & (CID_UNKNOWN_NAME | CID_PRIVATE_NUMBER))
00147       *name = NULL;
00148    else
00149       *name = cid->name;
00150    if (cid->flags & (CID_UNKNOWN_NUMBER | CID_PRIVATE_NUMBER))
00151       *number = NULL;
00152    else
00153       *number = cid->number;
00154 }
00155 
00156 void callerid_get_dtmf(char *cidstring, char *number, int *flags)
00157 {
00158    int i;
00159    int code;
00160 
00161    /* "Clear" the number-buffer. */
00162    number[0] = 0;
00163 
00164    if (strlen(cidstring) < 2) {
00165       ast_log(LOG_DEBUG, "No cid detected\n");
00166       *flags = CID_UNKNOWN_NUMBER;
00167       return;
00168    }
00169    
00170    /* Detect protocol and special types */
00171    if (cidstring[0] == 'B') {
00172       /* Handle special codes */
00173       code = atoi(&cidstring[1]);
00174       if (code == 0)
00175          *flags = CID_UNKNOWN_NUMBER;
00176       else if (code == 10) 
00177          *flags = CID_PRIVATE_NUMBER;
00178       else
00179          ast_log(LOG_DEBUG, "Unknown DTMF code %d\n", code);
00180    } else if (cidstring[0] == 'D' && cidstring[2] == '#') {
00181       /* .DK special code */
00182       if (cidstring[1] == '1')
00183          *flags = CID_PRIVATE_NUMBER;
00184       if (cidstring[1] == '2' || cidstring[1] == '3')
00185          *flags = CID_UNKNOWN_NUMBER;
00186    } else if (cidstring[0] == 'D' || cidstring[0] == 'A') {
00187       /* "Standard" callerid */
00188       for (i = 1; i < strlen(cidstring); i++ ) {
00189          if (cidstring[i] == 'C' || cidstring[i] == '#')
00190             break;
00191          if (isdigit(cidstring[i]))
00192             number[i-1] = cidstring[i];
00193          else
00194             ast_log(LOG_DEBUG, "Unknown CID digit '%c'\n",
00195                cidstring[i]);
00196       }
00197       number[i-1] = 0;
00198    } else if (isdigit(cidstring[0])) {
00199       /* It begins with a digit, so we parse it as a number and hope
00200        * for the best */
00201       ast_log(LOG_WARNING, "Couldn't detect start-character. CID "
00202          "parsing might be unreliable\n");
00203       for (i = 0; i < strlen(cidstring); i++) {
00204          if (isdigit(cidstring[i]))
00205                                 number[i] = cidstring[i];
00206          else
00207             break;
00208       }
00209       number[i] = 0;
00210    } else {
00211       ast_log(LOG_DEBUG, "Unknown CID protocol, start digit '%c'\n", 
00212          cidstring[0]);
00213       *flags = CID_UNKNOWN_NUMBER;
00214    }
00215 }
00216 
00217 int ast_gen_cas(unsigned char *outbuf, int sendsas, int len, int codec)
00218 {
00219    int pos = 0;
00220    int saslen=2400;
00221    float cr1 = 1.0;
00222    float ci1 = 0.0;
00223    float cr2 = 1.0;
00224    float ci2 = 0.0;
00225    if (sendsas) {
00226       if (len < saslen)
00227          return -1;
00228       gen_tone(outbuf, saslen, codec, sasdr, sasdi, &cr1, &ci1);
00229       len -= saslen;
00230       pos += saslen;
00231       cr2 = cr1;
00232       ci2 = ci1;
00233    }
00234    gen_tones(outbuf + pos, len, codec, casdr1, casdi1, casdr2, casdi2, &cr1, &ci1, &cr2, &ci2);
00235    return 0;
00236 }
00237 
00238 int callerid_feed(struct callerid_state *cid, unsigned char *ubuf, int len, int codec)
00239 {
00240    int mylen = len;
00241    int olen;
00242    int b = 'X';
00243    int res;
00244    int x;
00245    short *buf = malloc(2 * len + cid->oldlen);
00246    short *obuf = buf;
00247    if (!buf) {
00248       ast_log(LOG_WARNING, "Out of memory\n");
00249       return -1;
00250    }
00251    memset(buf, 0, 2 * len + cid->oldlen);
00252    memcpy(buf, cid->oldstuff, cid->oldlen);
00253    mylen += cid->oldlen/2;
00254    for (x=0;x<len;x++) 
00255       buf[x+cid->oldlen/2] = AST_XLAW(ubuf[x]);
00256    while(mylen >= 160) {
00257       olen = mylen;
00258       res = fsk_serie(&cid->fskd, buf, &mylen, &b);
00259       if (mylen < 0) {
00260          ast_log(LOG_ERROR, "fsk_serie made mylen < 0 (%d)\n", mylen);
00261          return -1;
00262       }
00263       buf += (olen - mylen);
00264       if (res < 0) {
00265          ast_log(LOG_NOTICE, "fsk_serie failed\n");
00266          return -1;
00267       }
00268       if (res == 1) {
00269          /* Ignore invalid bytes */
00270          if (b > 0xff)
00271             continue;
00272          switch(cid->sawflag) {
00273          case 0: /* Look for flag */
00274             if (b == 'U')
00275                cid->sawflag = 2;
00276             break;
00277          case 2: /* Get lead-in */
00278             if ((b == 0x04) || (b == 0x80)) {
00279                cid->type = b;
00280                cid->sawflag = 3;
00281                cid->cksum = b;
00282             }
00283             break;
00284          case 3:  /* Get length */
00285             /* Not a lead in.  We're ready  */
00286             cid->sawflag = 4;
00287             cid->len = b;
00288             cid->pos = 0;
00289             cid->cksum += b;
00290             break;
00291          case 4: /* Retrieve message */
00292             if (cid->pos >= 128) {
00293                ast_log(LOG_WARNING, "Caller ID too long???\n");
00294                return -1;
00295             }
00296             cid->rawdata[cid->pos++] = b;
00297             cid->len--;
00298             cid->cksum += b;
00299             if (!cid->len) {
00300                cid->rawdata[cid->pos] = '\0';
00301                cid->sawflag = 5;
00302             }
00303             break;
00304          case 5: /* Check checksum */
00305             if (b != (256 - (cid->cksum & 0xff))) {
00306                ast_log(LOG_NOTICE, "Caller*ID failed checksum\n");
00307                /* Try again */
00308                cid->sawflag = 0;
00309                break;
00310             }
00311       
00312             cid->number[0] = '\0';
00313             cid->name[0] = '\0';
00314             /* If we get this far we're fine.  */
00315             if (cid->type == 0x80) {
00316                /* MDMF */
00317                /* Go through each element and process */
00318                for (x=0;x< cid->pos;) {
00319                   switch(cid->rawdata[x++]) {
00320                   case 1:
00321                      /* Date */
00322                      break;
00323                   case 2: /* Number */
00324                   case 3: /* Number (for Zebble) */
00325                   case 4: /* Number */
00326                      res = cid->rawdata[x];
00327                      if (res > 32) {
00328                         ast_log(LOG_NOTICE, "Truncating long caller ID number from %d bytes to 32\n", cid->rawdata[x]);
00329                         res = 32; 
00330                      }
00331                      if (ast_strlen_zero(cid->number)) {
00332                         memcpy(cid->number, cid->rawdata + x + 1, res);
00333                         /* Null terminate */
00334                         cid->number[res] = '\0';
00335                      }
00336                      break;
00337                   case 7: /* Name */
00338                   case 8: /* Name */
00339                      res = cid->rawdata[x];
00340                      if (res > 32) {
00341                         ast_log(LOG_NOTICE, "Truncating long caller ID name from %d bytes to 32\n", cid->rawdata[x]);
00342                         res = 32; 
00343                      }
00344                      memcpy(cid->name, cid->rawdata + x + 1, res);
00345                      cid->name[res] = '\0';
00346                      break;
00347                   case 17: /* UK: Call type, 1=Voice Call, 2=Ringback when free, 129=Message waiting  */
00348                   case 19: /* UK: Network message system status (Number of messages waiting) */
00349                   case 22: /* Something French */
00350                      break;
00351                   default:
00352                      ast_log(LOG_NOTICE, "Unknown IE %d\n", cid->rawdata[x-1]);
00353                   }
00354                   x += cid->rawdata[x];
00355                   x++;
00356                }
00357             } else {
00358                /* SDMF */
00359                strncpy(cid->number, cid->rawdata + 8, sizeof(cid->number)-1);
00360             }
00361             /* Update flags */
00362             cid->flags = 0;
00363             if (!strcmp(cid->number, "P")) {
00364                strcpy(cid->number, "");
00365                cid->flags |= CID_PRIVATE_NUMBER;
00366             } else if (!strcmp(cid->number, "O") || ast_strlen_zero(cid->number)) {
00367                strcpy(cid->number, "");
00368                cid->flags |= CID_UNKNOWN_NUMBER;
00369             }
00370             if (!strcmp(cid->name, "P")) {
00371                strcpy(cid->name, "");
00372                cid->flags |= CID_PRIVATE_NAME;
00373             } else if (!strcmp(cid->name, "O") || ast_strlen_zero(cid->name)) {
00374                strcpy(cid->name, "");
00375                cid->flags |= CID_UNKNOWN_NAME;
00376             }
00377             return 1;
00378             break;
00379          default:
00380             ast_log(LOG_ERROR, "Dunno what to do with a digit in sawflag %d\n", cid->sawflag);
00381          }
00382       }
00383    }
00384    if (mylen) {
00385       memcpy(cid->oldstuff, buf, mylen * 2);
00386       cid->oldlen = mylen * 2;
00387    } else
00388       cid->oldlen = 0;
00389    free(obuf);
00390    return 0;
00391 }
00392 
00393 void callerid_free(struct callerid_state *cid)
00394 {
00395    free(cid);
00396 }
00397 
00398 static int callerid_genmsg(char *msg, int size, char *number, char *name, int flags)
00399 {
00400    time_t t;
00401    struct tm tm;
00402    char *ptr;
00403    int res;
00404    int i,x;
00405    /* Get the time */
00406    time(&t);
00407    localtime_r(&t,&tm);
00408    
00409    ptr = msg;
00410    
00411    /* Format time and message header */
00412    res = snprintf(ptr, size, "\001\010%02d%02d%02d%02d", tm.tm_mon + 1,
00413             tm.tm_mday, tm.tm_hour, tm.tm_min);
00414    size -= res;
00415    ptr += res;
00416    if (!number || ast_strlen_zero(number) || (flags & CID_UNKNOWN_NUMBER)) {
00417       /* Indicate number not known */
00418       res = snprintf(ptr, size, "\004\001O");
00419       size -= res;
00420       ptr += res;
00421    } else if (flags & CID_PRIVATE_NUMBER) {
00422       /* Indicate number is private */
00423       res = snprintf(ptr, size, "\004\001P");
00424       size -= res;
00425       ptr += res;
00426    } else {
00427       /* Send up to 16 digits of number MAX */
00428       i = strlen(number);
00429       if (i > 16) i = 16;
00430       res = snprintf(ptr, size, "\002%c", i);
00431       size -= res;
00432       ptr += res;
00433       for (x=0;x<i;x++)
00434          ptr[x] = number[x];
00435       ptr[i] = '\0';
00436       ptr += i;
00437       size -= i;
00438    }
00439 
00440    if (!name || ast_strlen_zero(name) || (flags & CID_UNKNOWN_NAME)) {
00441       /* Indicate name not known */
00442       res = snprintf(ptr, size, "\010\001O");
00443       size -= res;
00444       ptr += res;
00445    } else if (flags & CID_PRIVATE_NAME) {
00446       /* Indicate name is private */
00447       res = snprintf(ptr, size, "\010\001P");
00448       size -= res;
00449       ptr += res;
00450    } else {
00451       /* Send up to 16 digits of name MAX */
00452       i = strlen(name);
00453       if (i > 16) i = 16;
00454       res = snprintf(ptr, size, "\007%c", i);
00455       size -= res;
00456       ptr += res;
00457       for (x=0;x<i;x++)
00458          ptr[x] = name[x];
00459       ptr[i] = '\0';
00460       ptr += i;
00461       size -= i;
00462    }
00463    return (ptr - msg);
00464    
00465 }
00466 
00467 int vmwi_generate(unsigned char *buf, int active, int mdmf, int codec)
00468 {
00469    unsigned char msg[256];
00470    int len=0;
00471    int sum;
00472    int x;
00473    int bytes = 0;
00474    float cr = 1.0;
00475    float ci = 0.0;
00476    float scont = 0.0;
00477    if (mdmf) {
00478       /* MDMF Message waiting */
00479       msg[len++] = 0x82;
00480       /* Length is 3 */
00481       msg[len++] = 3;
00482       /* IE is "Message Waiting Parameter" */
00483       msg[len++] = 0xb;
00484       /* Length of IE is one */
00485       msg[len++] = 1;
00486       /* Active or not */
00487       if (active)
00488          msg[len++] = 0xff;
00489       else
00490          msg[len++] = 0x00;
00491    } else {
00492       /* SDMF Message waiting */
00493       msg[len++] = 0x6;
00494       /* Length is 3 */
00495       msg[len++] = 3;
00496       if (active) {
00497          msg[len++] = 0x42;
00498          msg[len++] = 0x42;
00499          msg[len++] = 0x42;
00500       } else {
00501          msg[len++] = 0x6f;
00502          msg[len++] = 0x6f;
00503          msg[len++] = 0x6f;
00504       }
00505    }
00506    sum = 0;
00507    for (x=0;x<len;x++)
00508       sum += msg[x];
00509    sum = (256 - (sum & 255));
00510    msg[len++] = sum;
00511    /* Wait a half a second */
00512    for (x=0;x<4000;x++)
00513       PUT_BYTE(0x7f);
00514    /* Transmit 30 0x55's (looks like a square wave) for channel seizure */
00515    for (x=0;x<30;x++)
00516       PUT_CLID(0x55);
00517    /* Send 170ms of callerid marks */
00518    for (x=0;x<170;x++)
00519       PUT_CLID_MARKMS;
00520    for (x=0;x<len;x++) {
00521       PUT_CLID(msg[x]);
00522    }
00523    /* Send 50 more ms of marks */
00524    for (x=0;x<50;x++)
00525       PUT_CLID_MARKMS;
00526    return bytes;
00527 }
00528 
00529 int callerid_generate(unsigned char *buf, char *number, char *name, int flags, int callwaiting, int codec)
00530 {
00531    int bytes=0;
00532    int x, sum;
00533    int len;
00534    /* Initial carriers (real/imaginary) */
00535    float cr = 1.0;
00536    float ci = 0.0;
00537    float scont = 0.0;
00538    unsigned char msg[256];
00539    len = callerid_genmsg(msg, sizeof(msg), number, name, flags);
00540    if (!callwaiting) {
00541       /* Wait a half a second */
00542       for (x=0;x<4000;x++)
00543          PUT_BYTE(0x7f);
00544       /* Transmit 30 0x55's (looks like a square wave) for channel seizure */
00545       for (x=0;x<30;x++)
00546          PUT_CLID(0x55);
00547    }
00548    /* Send 150ms of callerid marks */
00549    for (x=0;x<150;x++)
00550       PUT_CLID_MARKMS;
00551    /* Send 0x80 indicating MDMF format */
00552    PUT_CLID(0x80);
00553    /* Put length of whole message */
00554    PUT_CLID(len);
00555    sum = 0x80 + strlen(msg);
00556    /* Put each character of message and update checksum */
00557    for (x=0;x<len; x++) {
00558       PUT_CLID(msg[x]);
00559       sum += msg[x];
00560    }
00561    /* Send 2's compliment of sum */
00562    PUT_CLID(256 - (sum & 255));
00563 
00564    /* Send 50 more ms of marks */
00565    for (x=0;x<50;x++)
00566       PUT_CLID_MARKMS;
00567    
00568    return bytes;
00569 }
00570 
00571 void ast_shrink_phone_number(char *n)
00572 {
00573    int x,y=0;
00574    for (x=0;n[x];x++)
00575       if (!strchr("( )-.", n[x]))
00576          n[y++] = n[x];
00577    n[y] = '\0';
00578 }
00579 
00580 int ast_isphonenumber(char *n)
00581 {
00582    int x;
00583    if (!n || ast_strlen_zero(n))
00584       return 0;
00585    for (x=0;n[x];x++)
00586       if (!strchr("0123456789*#+", n[x]))
00587          return 0;
00588    return 1;
00589 }
00590 
00591 int ast_callerid_parse(char *instr, char **name, char **location)
00592 {
00593    char *ns, *ne;
00594    char *ls, *le;
00595    char tmp[256];
00596    /* Try for "name" <location> format or 
00597       name <location> format */
00598    if ((ls = strchr(instr, '<')) && (le = strchr(ls, '>'))) {
00599       /* Found the location */
00600       *le = '\0';
00601       *ls = '\0';
00602       *location = ls + 1;
00603       if ((ns = strchr(instr, '\"')) && (ne = strchr(ns + 1, '\"'))) {
00604          /* Get name out of quotes */
00605          *ns = '\0';
00606          *ne = '\0';
00607          *name = ns + 1;
00608          return 0;
00609       } else {
00610          /* Just trim off any trailing spaces */
00611          *name = instr;
00612          while(!ast_strlen_zero(instr) && (instr[strlen(instr) - 1] < 33))
00613             instr[strlen(instr) - 1] = '\0';
00614          /* And leading spaces */
00615          while(**name && (**name < 33))
00616             (*name)++;
00617          return 0;
00618       }
00619    } else {
00620       strncpy(tmp, instr, sizeof(tmp)-1);
00621       ast_shrink_phone_number(tmp);
00622       if (ast_isphonenumber(tmp)) {
00623          /* Assume it's just a location */
00624          *name = NULL;
00625          *location = instr;
00626       } else {
00627          /* Assume it's just a name.  Make sure it's not quoted though */
00628          *name = instr;
00629          while(*(*name) && ((*(*name) < 33) || (*(*name) == '\"'))) (*name)++;
00630          ne = *name + strlen(*name) - 1;
00631          while((ne > *name) && ((*ne < 33) || (*ne == '\"'))) { *ne = '\0'; ne--; }
00632          *location = NULL;
00633       }
00634       return 0;
00635    }
00636    return -1;
00637 }
00638 
00639 static int __ast_callerid_generate(unsigned char *buf, char *callerid, int callwaiting, int codec)
00640 {
00641    char tmp[256];
00642    char *n, *l;
00643    if (!callerid)
00644       return callerid_generate(buf, NULL, NULL, 0, callwaiting, codec);
00645    strncpy(tmp, callerid, sizeof(tmp)-1);
00646    if (ast_callerid_parse(tmp, &n, &l)) {
00647       ast_log(LOG_WARNING, "Unable to parse '%s' into CallerID name & number\n", callerid);
00648       return callerid_generate(buf, NULL, NULL, 0, callwaiting, codec);
00649    }
00650    if (l)
00651       ast_shrink_phone_number(l);
00652    if (!ast_isphonenumber(l))
00653       return callerid_generate(buf, NULL, n, 0, callwaiting, codec);
00654    return callerid_generate(buf, l, n, 0, callwaiting, codec);
00655 }
00656 
00657 int ast_callerid_generate(unsigned char *buf, char *callerid, int codec)
00658 {
00659    return __ast_callerid_generate(buf, callerid, 0, codec);
00660 }
00661 
00662 int ast_callerid_callwaiting_generate(unsigned char *buf, char *callerid, int codec)
00663 {
00664    return __ast_callerid_generate(buf, callerid, 1, codec);
00665 }