Fri May 26 01:45:29 2006

Asterisk developer's documentation


callerid.c

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00001 /*
00002  * Asterisk -- An open source telephony toolkit.
00003  *
00004  * Copyright (C) 1999 - 2005, Digium, Inc.
00005  *
00006  * Mark Spencer <markster@digium.com>
00007  *
00008  * See http://www.asterisk.org for more information about
00009  * the Asterisk project. Please do not directly contact
00010  * any of the maintainers of this project for assistance;
00011  * the project provides a web site, mailing lists and IRC
00012  * channels for your use.
00013  *
00014  * This program is free software, distributed under the terms of
00015  * the GNU General Public License Version 2. See the LICENSE file
00016  * at the top of the source tree.
00017  */
00018 
00019 /*! \file
00020  *
00021  * \brief CallerID Generation support 
00022  * 
00023  */
00024 
00025 #include <time.h>
00026 #include <string.h>
00027 #include <stdio.h>
00028 #include <stdlib.h>
00029 #include <unistd.h>
00030 #include <math.h>
00031 #include <ctype.h>
00032 
00033 #include "asterisk.h"
00034 
00035 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 7221 $")
00036 
00037 #include "asterisk/ulaw.h"
00038 #include "asterisk/alaw.h"
00039 #include "asterisk/frame.h"
00040 #include "asterisk/channel.h"
00041 #include "asterisk/callerid.h"
00042 #include "asterisk/logger.h"
00043 #include "asterisk/fskmodem.h"
00044 #include "asterisk/utils.h"
00045 
00046 struct callerid_state {
00047    fsk_data fskd;
00048    char rawdata[256];
00049    short oldstuff[160];
00050    int oldlen;
00051    int pos;
00052    int type;
00053    int cksum;
00054    char name[64];
00055    char number[64];
00056    int flags;
00057    int sawflag;
00058    int len;
00059 };
00060 
00061 
00062 float cid_dr[4], cid_di[4];
00063 float clidsb = 8000.0 / 1200.0;
00064 float sasdr, sasdi;
00065 float casdr1, casdi1, casdr2, casdi2;
00066 
00067 #define CALLERID_SPACE  2200.0      /*!< 2200 hz for "0" */
00068 #define CALLERID_MARK   1200.0      /*!< 1200 hz for "1" */
00069 #define SAS_FREQ      440.0
00070 #define CAS_FREQ1    2130.0
00071 #define CAS_FREQ2    2750.0
00072 
00073 #define AST_CALLERID_UNKNOWN  "<unknown>"
00074 
00075 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)
00076 {
00077    int x;
00078    float t;
00079    for (x=0;x<len;x++) {
00080       t = *cr1 * ddr1 - *ci1 * ddi1;
00081       *ci1 = *cr1 * ddi1 + *ci1 * ddr1;
00082       *cr1 = t;
00083       t = 2.0 - (*cr1 * *cr1 + *ci1 * *ci1);
00084       *cr1 *= t;
00085       *ci1 *= t;  
00086 
00087       t = *cr2 * ddr2 - *ci2 * ddi2;
00088       *ci2 = *cr2 * ddi2 + *ci2 * ddr2;
00089       *cr2 = t;
00090       t = 2.0 - (*cr2 * *cr2 + *ci2 * *ci2);
00091       *cr2 *= t;
00092       *ci2 *= t;  
00093       buf[x] = AST_LIN2X((*cr1 + *cr2) * 2048.0);
00094    }
00095 }
00096 
00097 static inline void gen_tone(unsigned char *buf, int len, int codec, float ddr1, float ddi1, float *cr1, float *ci1)
00098 {
00099    int x;
00100    float t;
00101    for (x=0;x<len;x++) {
00102       t = *cr1 * ddr1 - *ci1 * ddi1;
00103       *ci1 = *cr1 * ddi1 + *ci1 * ddr1;
00104       *cr1 = t;
00105       t = 2.0 - (*cr1 * *cr1 + *ci1 * *ci1);
00106       *cr1 *= t;
00107       *ci1 *= t;  
00108       buf[x] = AST_LIN2X(*cr1 * 8192.0);
00109    }
00110 }
00111 
00112 /*! \brief Initialize stuff for inverse FFT */
00113 void callerid_init(void)
00114 {
00115    cid_dr[0] = cos(CALLERID_SPACE * 2.0 * M_PI / 8000.0);
00116    cid_di[0] = sin(CALLERID_SPACE * 2.0 * M_PI / 8000.0);
00117    cid_dr[1] = cos(CALLERID_MARK * 2.0 * M_PI / 8000.0);
00118    cid_di[1] = sin(CALLERID_MARK * 2.0 * M_PI / 8000.0);
00119    sasdr = cos(SAS_FREQ * 2.0 * M_PI / 8000.0);
00120    sasdi = sin(SAS_FREQ * 2.0 * M_PI / 8000.0);
00121    casdr1 = cos(CAS_FREQ1 * 2.0 * M_PI / 8000.0);
00122    casdi1 = sin(CAS_FREQ1 * 2.0 * M_PI / 8000.0);
00123    casdr2 = cos(CAS_FREQ2 * 2.0 * M_PI / 8000.0);
00124    casdi2 = sin(CAS_FREQ2 * 2.0 * M_PI / 8000.0);
00125 }
00126 
00127 struct callerid_state *callerid_new(int cid_signalling)
00128 {
00129    struct callerid_state *cid;
00130    cid = malloc(sizeof(struct callerid_state));
00131    if (cid) {
00132       memset(cid, 0, sizeof(struct callerid_state));
00133       cid->fskd.spb = 7;      /* 1200 baud */
00134       cid->fskd.hdlc = 0;     /* Async */
00135       cid->fskd.nbit = 8;     /* 8 bits */
00136       cid->fskd.nstop = 1; /* 1 stop bit */
00137       cid->fskd.paridad = 0;  /* No parity */
00138       cid->fskd.bw=1;         /* Filter 800 Hz */
00139       if (cid_signalling == 2) { /* v23 signalling */
00140          cid->fskd.f_mark_idx =  4; /* 1300 Hz */
00141          cid->fskd.f_space_idx = 5; /* 2100 Hz */
00142       } else { /* Bell 202 signalling as default */ 
00143          cid->fskd.f_mark_idx =  2; /* 1200 Hz */
00144          cid->fskd.f_space_idx = 3; /* 2200 Hz */
00145       }
00146       cid->fskd.pcola = 0;    /* No clue */
00147       cid->fskd.cont = 0;        /* Digital PLL reset */
00148       cid->fskd.x0 = 0.0;
00149       cid->fskd.state = 0;
00150       memset(cid->name, 0, sizeof(cid->name));
00151       memset(cid->number, 0, sizeof(cid->number));
00152       cid->flags = CID_UNKNOWN_NAME | CID_UNKNOWN_NUMBER;
00153       cid->pos = 0;
00154    } else
00155       ast_log(LOG_WARNING, "Out of memory\n");
00156    return cid;
00157 }
00158 
00159 void callerid_get(struct callerid_state *cid, char **name, char **number, int *flags)
00160 {
00161    *flags = cid->flags;
00162    if (cid->flags & (CID_UNKNOWN_NAME | CID_PRIVATE_NUMBER))
00163       *name = NULL;
00164    else
00165       *name = cid->name;
00166    if (cid->flags & (CID_UNKNOWN_NUMBER | CID_PRIVATE_NUMBER))
00167       *number = NULL;
00168    else
00169       *number = cid->number;
00170 }
00171 
00172 void callerid_get_dtmf(char *cidstring, char *number, int *flags)
00173 {
00174    int i;
00175    int code;
00176 
00177    /* "Clear" the number-buffer. */
00178    number[0] = 0;
00179 
00180    if (strlen(cidstring) < 2) {
00181       ast_log(LOG_DEBUG, "No cid detected\n");
00182       *flags = CID_UNKNOWN_NUMBER;
00183       return;
00184    }
00185    
00186    /* Detect protocol and special types */
00187    if (cidstring[0] == 'B') {
00188       /* Handle special codes */
00189       code = atoi(&cidstring[1]);
00190       if (code == 0)
00191          *flags = CID_UNKNOWN_NUMBER;
00192       else if (code == 10) 
00193          *flags = CID_PRIVATE_NUMBER;
00194       else
00195          ast_log(LOG_DEBUG, "Unknown DTMF code %d\n", code);
00196    } else if (cidstring[0] == 'D' && cidstring[2] == '#') {
00197       /* .DK special code */
00198       if (cidstring[1] == '1')
00199          *flags = CID_PRIVATE_NUMBER;
00200       if (cidstring[1] == '2' || cidstring[1] == '3')
00201          *flags = CID_UNKNOWN_NUMBER;
00202    } else if (cidstring[0] == 'D' || cidstring[0] == 'A') {
00203       /* "Standard" callerid */
00204       for (i = 1; i < strlen(cidstring); i++ ) {
00205          if (cidstring[i] == 'C' || cidstring[i] == '#')
00206             break;
00207          if (isdigit(cidstring[i]))
00208             number[i-1] = cidstring[i];
00209          else
00210             ast_log(LOG_DEBUG, "Unknown CID digit '%c'\n",
00211                cidstring[i]);
00212       }
00213       number[i-1] = 0;
00214    } else if (isdigit(cidstring[0])) {
00215       /* It begins with a digit, so we parse it as a number and hope
00216        * for the best */
00217       ast_log(LOG_WARNING, "Couldn't detect start-character. CID "
00218          "parsing might be unreliable\n");
00219       for (i = 0; i < strlen(cidstring); i++) {
00220          if (isdigit(cidstring[i]))
00221                                 number[i] = cidstring[i];
00222          else
00223             break;
00224       }
00225       number[i] = 0;
00226    } else {
00227       ast_log(LOG_DEBUG, "Unknown CID protocol, start digit '%c'\n", 
00228          cidstring[0]);
00229       *flags = CID_UNKNOWN_NUMBER;
00230    }
00231 }
00232 
00233 int ast_gen_cas(unsigned char *outbuf, int sendsas, int len, int codec)
00234 {
00235    int pos = 0;
00236    int saslen=2400;
00237    float cr1 = 1.0;
00238    float ci1 = 0.0;
00239    float cr2 = 1.0;
00240    float ci2 = 0.0;
00241    if (sendsas) {
00242       if (len < saslen)
00243          return -1;
00244       gen_tone(outbuf, saslen, codec, sasdr, sasdi, &cr1, &ci1);
00245       len -= saslen;
00246       pos += saslen;
00247       cr2 = cr1;
00248       ci2 = ci1;
00249    }
00250    gen_tones(outbuf + pos, len, codec, casdr1, casdi1, casdr2, casdi2, &cr1, &ci1, &cr2, &ci2);
00251    return 0;
00252 }
00253 
00254 int callerid_feed(struct callerid_state *cid, unsigned char *ubuf, int len, int codec)
00255 {
00256    int mylen = len;
00257    int olen;
00258    int b = 'X';
00259    int res;
00260    int x;
00261    short *buf = malloc(2 * len + cid->oldlen);
00262    short *obuf = buf;
00263    if (!buf) {
00264       ast_log(LOG_WARNING, "Out of memory\n");
00265       return -1;
00266    }
00267    memset(buf, 0, 2 * len + cid->oldlen);
00268    memcpy(buf, cid->oldstuff, cid->oldlen);
00269    mylen += cid->oldlen/2;
00270    for (x=0;x<len;x++) 
00271       buf[x+cid->oldlen/2] = AST_XLAW(ubuf[x]);
00272    while(mylen >= 160) {
00273       olen = mylen;
00274       res = fsk_serie(&cid->fskd, buf, &mylen, &b);
00275       if (mylen < 0) {
00276          ast_log(LOG_ERROR, "fsk_serie made mylen < 0 (%d)\n", mylen);
00277          return -1;
00278       }
00279       buf += (olen - mylen);
00280       if (res < 0) {
00281          ast_log(LOG_NOTICE, "fsk_serie failed\n");
00282          return -1;
00283       }
00284       if (res == 1) {
00285          /* Ignore invalid bytes */
00286          if (b > 0xff)
00287             continue;
00288          switch(cid->sawflag) {
00289          case 0: /* Look for flag */
00290             if (b == 'U')
00291                cid->sawflag = 2;
00292             break;
00293          case 2: /* Get lead-in */
00294             if ((b == 0x04) || (b == 0x80)) {
00295                cid->type = b;
00296                cid->sawflag = 3;
00297                cid->cksum = b;
00298             }
00299             break;
00300          case 3:  /* Get length */
00301             /* Not a lead in.  We're ready  */
00302             cid->sawflag = 4;
00303             cid->len = b;
00304             cid->pos = 0;
00305             cid->cksum += b;
00306             break;
00307          case 4: /* Retrieve message */
00308             if (cid->pos >= 128) {
00309                ast_log(LOG_WARNING, "Caller ID too long???\n");
00310                return -1;
00311             }
00312             cid->rawdata[cid->pos++] = b;
00313             cid->len--;
00314             cid->cksum += b;
00315             if (!cid->len) {
00316                cid->rawdata[cid->pos] = '\0';
00317                cid->sawflag = 5;
00318             }
00319             break;
00320          case 5: /* Check checksum */
00321             if (b != (256 - (cid->cksum & 0xff))) {
00322                ast_log(LOG_NOTICE, "Caller*ID failed checksum\n");
00323                /* Try again */
00324                cid->sawflag = 0;
00325                break;
00326             }
00327       
00328             cid->number[0] = '\0';
00329             cid->name[0] = '\0';
00330             /* If we get this far we're fine.  */
00331             if (cid->type == 0x80) {
00332                /* MDMF */
00333                /* Go through each element and process */
00334                for (x=0;x< cid->pos;) {
00335                   switch(cid->rawdata[x++]) {
00336                   case 1:
00337                      /* Date */
00338                      break;
00339                   case 2: /* Number */
00340                   case 3: /* Number (for Zebble) */
00341                   case 4: /* Number */
00342                      res = cid->rawdata[x];
00343                      if (res > 32) {
00344                         ast_log(LOG_NOTICE, "Truncating long caller ID number from %d bytes to 32\n", cid->rawdata[x]);
00345                         res = 32; 
00346                      }
00347                      if (ast_strlen_zero(cid->number)) {
00348                         memcpy(cid->number, cid->rawdata + x + 1, res);
00349                         /* Null terminate */
00350                         cid->number[res] = '\0';
00351                      }
00352                      break;
00353                   case 6: /* Stentor Call Qualifier (ie. Long Distance call) */
00354                      break;
00355                   case 7: /* Name */
00356                   case 8: /* Name */
00357                      res = cid->rawdata[x];
00358                      if (res > 32) {
00359                         ast_log(LOG_NOTICE, "Truncating long caller ID name from %d bytes to 32\n", cid->rawdata[x]);
00360                         res = 32; 
00361                      }
00362                      memcpy(cid->name, cid->rawdata + x + 1, res);
00363                      cid->name[res] = '\0';
00364                      break;
00365                   case 17: /* UK: Call type, 1=Voice Call, 2=Ringback when free, 129=Message waiting  */
00366                   case 19: /* UK: Network message system status (Number of messages waiting) */
00367                   case 22: /* Something French */
00368                      break;
00369                   default:
00370                      ast_log(LOG_NOTICE, "Unknown IE %d\n", cid->rawdata[x-1]);
00371                   }
00372                   x += cid->rawdata[x];
00373                   x++;
00374                }
00375             } else {
00376                /* SDMF */
00377                ast_copy_string(cid->number, cid->rawdata + 8, sizeof(cid->number));
00378             }
00379             /* Update flags */
00380             cid->flags = 0;
00381             if (!strcmp(cid->number, "P")) {
00382                strcpy(cid->number, "");
00383                cid->flags |= CID_PRIVATE_NUMBER;
00384             } else if (!strcmp(cid->number, "O") || ast_strlen_zero(cid->number)) {
00385                strcpy(cid->number, "");
00386                cid->flags |= CID_UNKNOWN_NUMBER;
00387             }
00388             if (!strcmp(cid->name, "P")) {
00389                strcpy(cid->name, "");
00390                cid->flags |= CID_PRIVATE_NAME;
00391             } else if (!strcmp(cid->name, "O") || ast_strlen_zero(cid->name)) {
00392                strcpy(cid->name, "");
00393                cid->flags |= CID_UNKNOWN_NAME;
00394             }
00395             return 1;
00396             break;
00397          default:
00398             ast_log(LOG_ERROR, "Dunno what to do with a digit in sawflag %d\n", cid->sawflag);
00399          }
00400       }
00401    }
00402    if (mylen) {
00403       memcpy(cid->oldstuff, buf, mylen * 2);
00404       cid->oldlen = mylen * 2;
00405    } else
00406       cid->oldlen = 0;
00407    free(obuf);
00408    return 0;
00409 }
00410 
00411 void callerid_free(struct callerid_state *cid)
00412 {
00413    free(cid);
00414 }
00415 
00416 static int callerid_genmsg(char *msg, int size, char *number, char *name, int flags)
00417 {
00418    time_t t;
00419    struct tm tm;
00420    char *ptr;
00421    int res;
00422    int i,x;
00423    /* Get the time */
00424    time(&t);
00425    localtime_r(&t,&tm);
00426    
00427    ptr = msg;
00428    
00429    /* Format time and message header */
00430    res = snprintf(ptr, size, "\001\010%02d%02d%02d%02d", tm.tm_mon + 1,
00431             tm.tm_mday, tm.tm_hour, tm.tm_min);
00432    size -= res;
00433    ptr += res;
00434    if (ast_strlen_zero(number) || (flags & CID_UNKNOWN_NUMBER)) {
00435       /* Indicate number not known */
00436       res = snprintf(ptr, size, "\004\001O");
00437       size -= res;
00438       ptr += res;
00439    } else if (flags & CID_PRIVATE_NUMBER) {
00440       /* Indicate number is private */
00441       res = snprintf(ptr, size, "\004\001P");
00442       size -= res;
00443       ptr += res;
00444    } else {
00445       /* Send up to 16 digits of number MAX */
00446       i = strlen(number);
00447       if (i > 16) i = 16;
00448       res = snprintf(ptr, size, "\002%c", i);
00449       size -= res;
00450       ptr += res;
00451       for (x=0;x<i;x++)
00452          ptr[x] = number[x];
00453       ptr[i] = '\0';
00454       ptr += i;
00455       size -= i;
00456    }
00457 
00458    if (ast_strlen_zero(name) || (flags & CID_UNKNOWN_NAME)) {
00459       /* Indicate name not known */
00460       res = snprintf(ptr, size, "\010\001O");
00461       size -= res;
00462       ptr += res;
00463    } else if (flags & CID_PRIVATE_NAME) {
00464       /* Indicate name is private */
00465       res = snprintf(ptr, size, "\010\001P");
00466       size -= res;
00467       ptr += res;
00468    } else {
00469       /* Send up to 16 digits of name MAX */
00470       i = strlen(name);
00471       if (i > 16) i = 16;
00472       res = snprintf(ptr, size, "\007%c", i);
00473       size -= res;
00474       ptr += res;
00475       for (x=0;x<i;x++)
00476          ptr[x] = name[x];
00477       ptr[i] = '\0';
00478       ptr += i;
00479       size -= i;
00480    }
00481    return (ptr - msg);
00482    
00483 }
00484 
00485 int vmwi_generate(unsigned char *buf, int active, int mdmf, int codec)
00486 {
00487    unsigned char msg[256];
00488    int len=0;
00489    int sum;
00490    int x;
00491    int bytes = 0;
00492    float cr = 1.0;
00493    float ci = 0.0;
00494    float scont = 0.0;
00495    if (mdmf) {
00496       /* MDMF Message waiting */
00497       msg[len++] = 0x82;
00498       /* Length is 3 */
00499       msg[len++] = 3;
00500       /* IE is "Message Waiting Parameter" */
00501       msg[len++] = 0xb;
00502       /* Length of IE is one */
00503       msg[len++] = 1;
00504       /* Active or not */
00505       if (active)
00506          msg[len++] = 0xff;
00507       else
00508          msg[len++] = 0x00;
00509    } else {
00510       /* SDMF Message waiting */
00511       msg[len++] = 0x6;
00512       /* Length is 3 */
00513       msg[len++] = 3;
00514       if (active) {
00515          msg[len++] = 0x42;
00516          msg[len++] = 0x42;
00517          msg[len++] = 0x42;
00518       } else {
00519          msg[len++] = 0x6f;
00520          msg[len++] = 0x6f;
00521          msg[len++] = 0x6f;
00522       }
00523    }
00524    sum = 0;
00525    for (x=0;x<len;x++)
00526       sum += msg[x];
00527    sum = (256 - (sum & 255));
00528    msg[len++] = sum;
00529    /* Wait a half a second */
00530    for (x=0;x<4000;x++)
00531       PUT_BYTE(0x7f);
00532    /* Transmit 30 0x55's (looks like a square wave) for channel seizure */
00533    for (x=0;x<30;x++)
00534       PUT_CLID(0x55);
00535    /* Send 170ms of callerid marks */
00536    for (x=0;x<170;x++)
00537       PUT_CLID_MARKMS;
00538    for (x=0;x<len;x++) {
00539       PUT_CLID(msg[x]);
00540    }
00541    /* Send 50 more ms of marks */
00542    for (x=0;x<50;x++)
00543       PUT_CLID_MARKMS;
00544    return bytes;
00545 }
00546 
00547 int callerid_generate(unsigned char *buf, char *number, char *name, int flags, int callwaiting, int codec)
00548 {
00549    int bytes=0;
00550    int x, sum;
00551    int len;
00552    /* Initial carriers (real/imaginary) */
00553    float cr = 1.0;
00554    float ci = 0.0;
00555    float scont = 0.0;
00556    char msg[256];
00557    len = callerid_genmsg(msg, sizeof(msg), number, name, flags);
00558    if (!callwaiting) {
00559       /* Wait a half a second */
00560       for (x=0;x<4000;x++)
00561          PUT_BYTE(0x7f);
00562       /* Transmit 30 0x55's (looks like a square wave) for channel seizure */
00563       for (x=0;x<30;x++)
00564          PUT_CLID(0x55);
00565    }
00566    /* Send 150ms of callerid marks */
00567    for (x=0;x<150;x++)
00568       PUT_CLID_MARKMS;
00569    /* Send 0x80 indicating MDMF format */
00570    PUT_CLID(0x80);
00571    /* Put length of whole message */
00572    PUT_CLID(len);
00573    sum = 0x80 + strlen(msg);
00574    /* Put each character of message and update checksum */
00575    for (x=0;x<len; x++) {
00576       PUT_CLID(msg[x]);
00577       sum += msg[x];
00578    }
00579    /* Send 2's compliment of sum */
00580    PUT_CLID(256 - (sum & 255));
00581 
00582    /* Send 50 more ms of marks */
00583    for (x=0;x<50;x++)
00584       PUT_CLID_MARKMS;
00585    
00586    return bytes;
00587 }
00588 
00589 void ast_shrink_phone_number(char *n)
00590 {
00591    int x,y=0;
00592    int bracketed=0;
00593    for (x=0;n[x];x++) {
00594       switch(n[x]) {
00595       case '[':
00596          bracketed++;
00597          n[y++] = n[x];
00598          break;
00599       case ']':
00600          bracketed--;
00601          n[y++] = n[x];
00602          break;
00603       case '-':
00604          if (bracketed)
00605             n[y++] = n[x];
00606          break;
00607       case '.':
00608          if (!n[x+1])
00609             n[y++] = n[x];
00610          break;
00611       default:
00612          if (!strchr("( )", n[x]))
00613             n[y++] = n[x];
00614       }
00615    }
00616    n[y] = '\0';
00617 }
00618 
00619 /*! \brief checks if string consists only of digits and * \# and + 
00620    \return 1 if string is valid AST phone number
00621    \return 0 if not
00622 */
00623 int ast_isphonenumber(char *n)
00624 {
00625    int x;
00626    if (ast_strlen_zero(n))
00627       return 0;
00628    for (x=0;n[x];x++)
00629       if (!strchr("0123456789*#+", n[x]))
00630          return 0;
00631    return 1;
00632 }
00633 
00634 /*! \brief parse string for caller id information 
00635    \return returns -1 on failure, otherwise 0
00636 */
00637 int ast_callerid_parse(char *instr, char **name, char **location)
00638 {
00639    char *ns, *ne;
00640    char *ls, *le;
00641    char tmp[256];
00642    /* Try for "name" <location> format or 
00643       name <location> format */
00644    if ((ls = strchr(instr, '<')) && (le = strchr(ls, '>'))) {
00645       /* Found the location */
00646       *le = '\0';
00647       *ls = '\0';
00648       *location = ls + 1;
00649       if ((ns = strchr(instr, '\"')) && (ne = strchr(ns + 1, '\"'))) {
00650          /* Get name out of quotes */
00651          *ns = '\0';
00652          *ne = '\0';
00653          *name = ns + 1;
00654          return 0;
00655       } else {
00656          /* Just trim off any trailing spaces */
00657          *name = instr;
00658          while(!ast_strlen_zero(instr) && (instr[strlen(instr) - 1] < 33))
00659             instr[strlen(instr) - 1] = '\0';
00660          /* And leading spaces */
00661          *name = ast_skip_blanks(*name);
00662          return 0;
00663       }
00664    } else {
00665       ast_copy_string(tmp, instr, sizeof(tmp));
00666       ast_shrink_phone_number(tmp);
00667       if (ast_isphonenumber(tmp)) {
00668          /* Assume it's just a location */
00669          *name = NULL;
00670          *location = instr;
00671       } else {
00672          /* Assume it's just a name.  Make sure it's not quoted though */
00673          *name = instr;
00674          while(*(*name) && ((*(*name) < 33) || (*(*name) == '\"'))) (*name)++;
00675          ne = *name + strlen(*name) - 1;
00676          while((ne > *name) && ((*ne < 33) || (*ne == '\"'))) { *ne = '\0'; ne--; }
00677          *location = NULL;
00678       }
00679       return 0;
00680    }
00681    return -1;
00682 }
00683 
00684 static int __ast_callerid_generate(unsigned char *buf, char *name, char *number, int callwaiting, int codec)
00685 {
00686    if (ast_strlen_zero(name))
00687       name = NULL;
00688    if (ast_strlen_zero(number))
00689       number = NULL;
00690    return callerid_generate(buf, number, name, 0, callwaiting, codec);
00691 }
00692 
00693 int ast_callerid_generate(unsigned char *buf, char *name, char *number, int codec)
00694 {
00695    return __ast_callerid_generate(buf, name, number, 0, codec);
00696 }
00697 
00698 int ast_callerid_callwaiting_generate(unsigned char *buf, char *name, char *number, int codec)
00699 {
00700    return __ast_callerid_generate(buf, name, number, 1, codec);
00701 }
00702 
00703 char *ast_callerid_merge(char *buf, int bufsiz, const char *name, const char *num, const char *unknown)
00704 {
00705    if (!unknown)
00706       unknown = "<unknown>";
00707    if (name && num)
00708       snprintf(buf, bufsiz, "\"%s\" <%s>", name, num);
00709    else if (name) 
00710       ast_copy_string(buf, name, bufsiz);
00711    else if (num)
00712       ast_copy_string(buf, num, bufsiz);
00713    else
00714       ast_copy_string(buf, unknown, bufsiz);
00715    return buf;
00716 }
00717 
00718 int ast_callerid_split(const char *buf, char *name, int namelen, char *num, int numlen)
00719 {
00720    char *tmp;
00721    char *l = NULL, *n = NULL;
00722    tmp = ast_strdupa(buf);
00723    if (!tmp) {
00724       name[0] = '\0';
00725       num[0] = '\0';
00726       return -1;
00727    }
00728    ast_callerid_parse(tmp, &n, &l);
00729    if (n)
00730       ast_copy_string(name, n, namelen);
00731    else
00732       name[0] = '\0';
00733    if (l) {
00734       ast_shrink_phone_number(l);
00735       ast_copy_string(num, l, numlen);
00736    } else
00737       num[0] = '\0';
00738    return 0;
00739 }
00740 
00741 static struct {
00742    int val;
00743    char *name;
00744    char *description;
00745 } pres_types[] = {
00746    {  AST_PRES_ALLOWED_USER_NUMBER_NOT_SCREENED, "allowed_not_screened", "Presentation Allowed, Not Screened"},
00747    {  AST_PRES_ALLOWED_USER_NUMBER_PASSED_SCREEN, "allowed_passed_screen", "Presentation Allowed, Passed Screen"},
00748    {  AST_PRES_ALLOWED_USER_NUMBER_FAILED_SCREEN, "allowed_failed_screen", "Presentation Allowed, Failed Screen"},
00749    {  AST_PRES_ALLOWED_NETWORK_NUMBER, "allowed", "Presentation Allowed, Network Number"},
00750    {  AST_PRES_PROHIB_USER_NUMBER_NOT_SCREENED, "prohib_not_screened", "Presentation Prohibited, Not Screened"},
00751    {  AST_PRES_PROHIB_USER_NUMBER_PASSED_SCREEN, "prohib_passed_screen", "Presentation Prohibited, Passed Screen"},
00752    {  AST_PRES_PROHIB_USER_NUMBER_FAILED_SCREEN, "prohib_failed_screen", "Presentation Prohibited, Failed Screen"},
00753    {  AST_PRES_PROHIB_NETWORK_NUMBER, "prohib", "Presentation Prohibited, Network Number"},
00754    {  AST_PRES_NUMBER_NOT_AVAILABLE, "unavailable", "Number Unavailable"},
00755 };
00756 
00757 /*! \brief Convert caller ID text code to value 
00758    used in config file parsing
00759    \param data text string
00760    \return value AST_PRES_ from callerid.h 
00761 */
00762 int ast_parse_caller_presentation(const char *data)
00763 {
00764    int i;
00765 
00766    for (i = 0; i < ((sizeof(pres_types) / sizeof(pres_types[0]))); i++) {
00767       if (!strcasecmp(pres_types[i].name, data))
00768          return pres_types[i].val;
00769    }
00770 
00771    return -1;
00772 }
00773 
00774 /*! \brief Convert caller ID pres value to explanatory string 
00775    \param data value (see callerid.h AST_PRES_ ) 
00776    \return string for human presentation
00777 */
00778 const char *ast_describe_caller_presentation(int data)
00779 {
00780    int i;
00781 
00782    for (i = 0; i < ((sizeof(pres_types) / sizeof(pres_types[0]))); i++) {
00783       if (pres_types[i].val == data)
00784          return pres_types[i].description;
00785    }
00786 
00787    return "unknown";
00788 }

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