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asterisk/apps/app_sms.c

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/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 2004 - 2005, Adrian Kennard, rights assigned to Digium
*
* See http://www.asterisk.org for more information about
* the Asterisk project. Please do not directly contact
* any of the maintainers of this project for assistance;
* the project provides a web site, mailing lists and IRC
* channels for your use.
*
* This program is free software, distributed under the terms of
* the GNU General Public License Version 2. See the LICENSE file
* at the top of the source tree.
*/
/*! \file
*
* \brief SMS application - ETSI ES 201 912 protocol 1 implementation
*
* \par Development notes
* \note The ETSI standards are available free of charge from ETSI at
* http://pda.etsi.org/pda/queryform.asp
* Among the relevant documents here we have:
*
* ES 201 912 SMS for PSTN/ISDN
* TS 123 040 Technical realization of SMS
*
*
* \ingroup applications
*
* \author Adrian Kennard (for the original protocol 1 code)
* \author Filippo Grassilli (Hyppo) - protocol 2 support
* Not fully tested, under development
*/
/*** MODULEINFO
<support_level>extended</support_level>
***/
#include "asterisk.h"
ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#include <dirent.h>
#include <ctype.h>
#include <sys/stat.h>
#include "asterisk/paths.h" /* use ast_config_AST_SPOOL_DIR and LOG_DIR */
#include "asterisk/lock.h"
#include "asterisk/file.h"
#include "asterisk/channel.h"
#include "asterisk/pbx.h"
#include "asterisk/module.h"
#include "asterisk/alaw.h"
#include "asterisk/callerid.h"
#include "asterisk/utils.h"
#include "asterisk/app.h"
/*** DOCUMENTATION
<application name="SMS" language="en_US">
<synopsis>
Communicates with SMS service centres and SMS capable analogue phones.
</synopsis>
<syntax>
<parameter name="name" required="true">
<para>The name of the queue used in <filename>/var/spool/asterisk/sms</filename></para>
</parameter>
<parameter name="options">
<optionlist>
<option name="a">
<para>Answer, i.e. send initial FSK packet.</para>
</option>
<option name="s">
<para>Act as service centre talking to a phone.</para>
</option>
<option name="t">
<para>Use protocol 2 (default used is protocol 1).</para>
</option>
<option name="p">
<para>Set the initial delay to N ms (default is <literal>300</literal>).
addr and body are a deprecated format to send messages out.</para>
</option>
<option name="r">
<para>Set the Status Report Request (SRR) bit.</para>
</option>
<option name="o">
<para>The body should be coded as octets not 7-bit symbols.</para>
</option>
</optionlist>
</parameter>
<parameter name="addr" />
<parameter name="body" />
</syntax>
<description>
<para>SMS handles exchange of SMS data with a call to/from SMS capable phone or SMS PSTN service center.
Can send and/or receive SMS messages. Works to ETSI ES 201 912; compatible with BT SMS PSTN service in
UK and Telecom Italia in Italy.</para>
<para>Typical usage is to use to handle calls from the SMS service centre CLI, or to set up a call using
<literal>outgoing</literal> or manager interface to connect service centre to SMS().</para>
<para>"Messages are processed as per text file message queues. smsq (a separate software) is a command to
generate message queues and send messages.</para>
<note><para>The protocol has tight delay bounds. Please use short frames and disable/keep short the
jitter buffer on the ATA to make sure that respones (ACK etc.) are received in time.</para></note>
</description>
</application>
***/
/* #define OUTALAW */ /* enable this to output Alaw rather than linear */
/* ToDo */
/* Add full VP support */
/* Handle status report messages (generation and reception) */
/* Time zones on time stamps */
/* user ref field */
static volatile unsigned char message_ref; /* arbitary message ref */
static volatile unsigned int seq; /* arbitrary message sequence number for unqiue files */
static char log_file[255];
static char *app = "SMS";
/*
* 80 samples of a single period of the wave. At 8000 Hz, it means these
* are the samples of a 100 Hz signal.
* To pick the two carriers (1300Hz for '1' and 2100 Hz for '0') used by
* the modulation, we should take one every 13 and 21 samples respectively.
*/
static const signed short wave[] = {
0, 392, 782, 1167, 1545, 1913, 2270, 2612, 2939, 3247, 3536, 3802, 4045, 4263, 4455, 4619, 4755, 4862, 4938, 4985,
5000, 4985, 4938, 4862, 4755, 4619, 4455, 4263, 4045, 3802, 3536, 3247, 2939, 2612, 2270, 1913, 1545, 1167, 782, 392,
0, -392, -782, -1167,
-1545, -1913, -2270, -2612, -2939, -3247, -3536, -3802, -4045, -4263, -4455, -4619, -4755, -4862, -4938, -4985, -5000,
-4985, -4938, -4862,
-4755, -4619, -4455, -4263, -4045, -3802, -3536, -3247, -2939, -2612, -2270, -1913, -1545, -1167, -782, -392
};
#ifdef OUTALAW
static unsigned char wavea[80];
typedef unsigned char output_t;
static const output_t *wave_out = wavea; /* outgoing samples */
#define __OUT_FMT AST_FORMAT_ALAW;
#else
typedef signed short output_t;
static const output_t *wave_out = wave; /* outgoing samples */
#define __OUT_FMT AST_FORMAT_SLINEAR
#endif
#define OSYNC_BITS 80 /* initial sync bits */
/*!
* The SMS spec ETSI ES 201 912 defines two protocols with different message types.
* Also note that the high bit is used to indicate whether the message
* is complete or not, but in two opposite ways:
* for Protocol 1, 0x80 means that the message is complete;
* for Protocol 2, 0x00 means that the message is complete;
*/
enum message_types {
DLL_SMS_MASK = 0x7f, /* mask for the valid bits */
/* Protocol 1 values */
DLL1_SMS_DATA = 0x11, /* data packet */
DLL1_SMS_ERROR = 0x12,
DLL1_SMS_EST = 0x13, /* start the connection */
DLL1_SMS_REL = 0x14, /* end the connection */
DLL1_SMS_ACK = 0x15,
DLL1_SMS_NACK = 0x16,
DLL1_SMS_COMPLETE = 0x80, /* packet is complete */
DLL1_SMS_MORE = 0x00, /* more data to follow */
/* Protocol 2 values */
DLL2_SMS_EST = 0x7f, /* magic number. No message body */
DLL2_SMS_INFO_MO = 0x10,
DLL2_SMS_INFO_MT = 0x11,
DLL2_SMS_INFO_STA = 0x12,
DLL2_SMS_NACK = 0x13,
DLL2_SMS_ACK0 = 0x14, /* ack even-numbered frame */
DLL2_SMS_ACK1 = 0x15, /* ack odd-numbered frame */
DLL2_SMS_ENQ = 0x16,
DLL2_SMS_REL = 0x17, /* end the connection */
DLL2_SMS_COMPLETE = 0x00, /* packet is complete */
DLL2_SMS_MORE = 0x80, /* more data to follow */
};
/* SMS 7 bit character mapping to UCS-2 */
static const unsigned short defaultalphabet[] = {
0x0040, 0x00A3, 0x0024, 0x00A5, 0x00E8, 0x00E9, 0x00F9, 0x00EC,
0x00F2, 0x00E7, 0x000A, 0x00D8, 0x00F8, 0x000D, 0x00C5, 0x00E5,
0x0394, 0x005F, 0x03A6, 0x0393, 0x039B, 0x03A9, 0x03A0, 0x03A8,
0x03A3, 0x0398, 0x039E, 0x00A0, 0x00C6, 0x00E6, 0x00DF, 0x00C9,
' ', '!', '"', '#', 164, '%', '&', 39, '(', ')', '*', '+', ',', '-', '.', '/',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', ':', ';', '<', '=', '>', '?',
161, 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O',
'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 196, 214, 209, 220, 167,
191, 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 228, 246, 241, 252, 224,
};
static const unsigned short escapes[] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x000C, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0x005E, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0x007B, 0x007D, 0, 0, 0, 0, 0, 0x005C,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x005B, 0x007E, 0x005D, 0,
0x007C, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0x20AC, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
};
#define SMSLEN 160 /*!< max SMS length */
#define SMSLEN_8 140 /*!< max SMS length for 8-bit char */
typedef struct sms_s {
unsigned char hangup; /*!< we are done... */
unsigned char err; /*!< set for any errors */
unsigned char smsc:1; /*!< we are SMSC */
unsigned char rx:1; /*!< this is a received message */
char queue[30]; /*!< queue name */
char oa[20]; /*!< originating address */
char da[20]; /*!< destination address */
struct timeval scts; /*!< time stamp, UTC */
unsigned char pid; /*!< protocol ID */
unsigned char dcs; /*!< data coding scheme */
short mr; /*!< message reference - actually a byte, but use -1 for not set */
int udl; /*!< user data length */
int udhl; /*!< user data header length */
unsigned char srr:1; /*!< Status Report request */
unsigned char udhi:1; /*!< User Data Header required, even if length 0 */
unsigned char rp:1; /*!< Reply Path */
unsigned int vp; /*!< validity period in minutes, 0 for not set */
unsigned short ud[SMSLEN]; /*!< user data (message), UCS-2 coded */
unsigned char udh[SMSLEN]; /*!< user data header */
char cli[20]; /*!< caller ID */
unsigned char ophase; /*!< phase (0-79) for 0 and 1 frequencies (1300Hz and 2100Hz) */
unsigned char ophasep; /*!< phase (0-79) for 1200 bps */
unsigned char obyte; /*!< byte being sent */
unsigned int opause; /*!< silent pause before sending (in sample periods) */
unsigned char obitp; /*!< bit in byte */
unsigned char osync; /*!< sync bits to send */
unsigned char obytep; /*!< byte in data */
unsigned char obyten; /*!< bytes in data */
unsigned char omsg[256]; /*!< data buffer (out) */
unsigned char imsg[250]; /*!< data buffer (in) */
signed long long ims0,
imc0,
ims1,
imc1; /*!< magnitude averages sin/cos 0/1 */
unsigned int idle;
unsigned short imag; /*!< signal level */
unsigned char ips0; /*!< phase sin for bit 0, start at 0 inc by 21 mod 80 */
unsigned char ips1; /*!< phase cos for bit 0, start at 20 inc by 21 mod 80 */
unsigned char ipc0; /*!< phase sin for bit 1, start at 0 inc by 13 mod 80 */
unsigned char ipc1; /*!< phase cos for bit 1, start at 20 inc by 13 mod 80 */
unsigned char ibitl; /*!< last bit */
unsigned char ibitc; /*!< bit run length count */
unsigned char iphasep; /*!< bit phase (0-79) for 1200 bps */
unsigned char ibitn; /*!< bit number in byte being received */
unsigned char ibytev; /*!< byte value being received */
unsigned char ibytep; /*!< byte pointer in message */
unsigned char ibytec; /*!< byte checksum for message */
unsigned char ierr; /*!< error flag */
unsigned char ibith; /*!< history of last bits */
unsigned char ibitt; /*!< total of 1's in last 3 bytes */
/* more to go here */
int opause_0; /*!< initial delay in ms, p() option */
int protocol; /*!< ETSI SMS protocol to use (passed at app call) */
int oseizure; /*!< protocol 2: channel seizure bits to send */
int framenumber; /*!< protocol 2: frame number (for sending ACK0 or ACK1) */
char udtxt[SMSLEN]; /*!< user data (message), PLAIN text */
} sms_t;
/* different types of encoding */
#define is7bit(dcs) ( ((dcs) & 0xC0) ? (!((dcs) & 4) ) : (((dcs) & 0xc) == 0) )
#define is8bit(dcs) ( ((dcs) & 0xC0) ? ( ((dcs) & 4) ) : (((dcs) & 0xc) == 4) )
#define is16bit(dcs) ( ((dcs) & 0xC0) ? 0 : (((dcs) & 0xc) == 8) )
static void sms_messagetx(sms_t *h);
/*! \brief copy number, skipping non digits apart from leading + */
static void numcpy(char *d, char *s)
{
if (*s == '+') {
*d++ = *s++;
}
while (*s) {
if (isdigit(*s)) {
*d++ = *s;
}
s++;
}
*d = 0;
}
/*! \brief static, return a date/time in ISO format */
static char *isodate(time_t t, char *buf, int len)
{
struct ast_tm tm;
struct timeval local = { t, 0 };
ast_localtime(&local, &tm, NULL);
ast_strftime(buf, len, "%Y-%m-%dT%H:%M:%S", &tm);
return buf;
}
/*! \brief Reads next UCS character from NUL terminated UTF-8 string and advance pointer */
/* for non valid UTF-8 sequences, returns character as is */
/* Does not advance pointer for null termination */
static long utf8decode(unsigned char **pp)
{
unsigned char *p = *pp;
if (!*p) {
return 0; /* null termination of string */
}
(*pp)++;
if (*p < 0xC0) {
return *p; /* ascii or continuation character */
}
if (*p < 0xE0) {
if (*p < 0xC2 || (p[1] & 0xC0) != 0x80) {
return *p; /* not valid UTF-8 */
}
(*pp)++;
return ((*p & 0x1F) << 6) + (p[1] & 0x3F);
}
if (*p < 0xF0) {
if ((*p == 0xE0 && p[1] < 0xA0) || (p[1] & 0xC0) != 0x80 || (p[2] & 0xC0) != 0x80) {
return *p; /* not valid UTF-8 */
}
(*pp) += 2;
return ((*p & 0x0F) << 12) + ((p[1] & 0x3F) << 6) + (p[2] & 0x3F);
}
if (*p < 0xF8) {
if ((*p == 0xF0 && p[1] < 0x90) || (p[1] & 0xC0) != 0x80 || (p[2] & 0xC0) != 0x80 || (p[3] & 0xC0) != 0x80) {
return *p; /* not valid UTF-8 */
}
(*pp) += 3;
return ((*p & 0x07) << 18) + ((p[1] & 0x3F) << 12) + ((p[2] & 0x3F) << 6) + (p[3] & 0x3F);
}
if (*p < 0xFC) {
if ((*p == 0xF8 && p[1] < 0x88) || (p[1] & 0xC0) != 0x80 || (p[2] & 0xC0) != 0x80 || (p[3] & 0xC0) != 0x80
|| (p[4] & 0xC0) != 0x80) {
return *p; /* not valid UTF-8 */
}
(*pp) += 4;
return ((*p & 0x03) << 24) + ((p[1] & 0x3F) << 18) + ((p[2] & 0x3F) << 12) + ((p[3] & 0x3F) << 6) + (p[4] & 0x3F);
}
if (*p < 0xFE) {
if ((*p == 0xFC && p[1] < 0x84) || (p[1] & 0xC0) != 0x80 || (p[2] & 0xC0) != 0x80 || (p[3] & 0xC0) != 0x80
|| (p[4] & 0xC0) != 0x80 || (p[5] & 0xC0) != 0x80) {
return *p; /* not valid UTF-8 */
}
(*pp) += 5;
return ((*p & 0x01) << 30) + ((p[1] & 0x3F) << 24) + ((p[2] & 0x3F) << 18) + ((p[3] & 0x3F) << 12) + ((p[4] & 0x3F) << 6) + (p[5] & 0x3F);
}
return *p; /* not sensible */
}
/*! \brief takes a binary header (udhl bytes at udh) and UCS-2 message (udl characters at ud) and packs in to o using SMS 7 bit character codes */
/* The return value is the number of septets packed in to o, which is internally limited to SMSLEN */
/* o can be null, in which case this is used to validate or count only */
/* if the input contains invalid characters then the return value is -1 */
static int packsms7(unsigned char *o, int udhl, unsigned char *udh, int udl, unsigned short *ud)
{
unsigned char p = 0; /* output pointer (bytes) */
unsigned char b = 0; /* bit position */
unsigned char n = 0; /* output character count */
unsigned char dummy[SMSLEN];
if (o == NULL) { /* output to a dummy buffer if o not set */
o = dummy;
}
if (udhl) { /* header */
o[p++] = udhl;
b = 1;
n = 1;
while (udhl--) {
o[p++] = *udh++;
b += 8;
while (b >= 7) {
b -= 7;
n++;
}
if (n >= SMSLEN)
return n;
}
if (b) {
b = 7 - b;
if (++n >= SMSLEN)
return n;
} /* filling to septet boundary */
}
o[p] = 0;
/* message */
while (udl--) {
long u;
unsigned char v;
u = *ud++;
/* XXX 0 is invalid ? */
/* look up in defaultalphabet[]. If found, v is the 7-bit code */
for (v = 0; v < 128 && defaultalphabet[v] != u; v++);
if (v == 128 /* not found */ && u && n + 1 < SMSLEN) {
/* if not found, look in the escapes table (we need 2 bytes) */
for (v = 0; v < 128 && escapes[v] != u; v++);
if (v < 128) { /* escaped sequence, esc + v */
/* store the low (8-b) bits in o[p], the remaining bits in o[p+1] */
o[p] |= (27 << b); /* the low bits go into o[p] */
b += 7;
if (b >= 8) {
b -= 8;
p++;
o[p] = (27 >> (7 - b));
}
n++;
}
}
if (v == 128)
return -1; /* invalid character */
/* store, same as above */
o[p] |= (v << b);
b += 7;
if (b >= 8) {
b -= 8;
p++;
o[p] = (v >> (7 - b));
}
if (++n >= SMSLEN)
return n;
}
return n;
}
/*! \brief takes a binary header (udhl bytes at udh) and UCS-2 message (udl characters at ud)
* and packs in to o using 8 bit character codes.
* The return value is the number of bytes packed in to o, which is internally limited to 140.
* o can be null, in which case this is used to validate or count only.
* if the input contains invalid characters then the return value is -1
*/
static int packsms8(unsigned char *o, int udhl, unsigned char *udh, int udl, unsigned short *ud)
{
unsigned char p = 0;
unsigned char dummy[SMSLEN_8];
if (o == NULL)
o = dummy;
/* header - no encoding */
if (udhl) {
o[p++] = udhl;
while (udhl--) {
o[p++] = *udh++;
if (p >= SMSLEN_8) {
return p;
}
}
}
while (udl--) {
long u;
u = *ud++;
if (u < 0 || u > 0xFF) {
return -1; /* not valid */
}
o[p++] = u;
if (p >= SMSLEN_8) {
return p;
}
}
return p;
}
/*! \brief takes a binary header (udhl bytes at udh) and UCS-2
message (udl characters at ud) and packs in to o using 16 bit
UCS-2 character codes
The return value is the number of bytes packed in to o, which is
internally limited to 140
o can be null, in which case this is used to validate or count
only if the input contains invalid characters then
the return value is -1 */
static int packsms16(unsigned char *o, int udhl, unsigned char *udh, int udl, unsigned short *ud)
{
unsigned char p = 0;
unsigned char dummy[SMSLEN_8];
if (o == NULL) {
o = dummy;
}
/* header - no encoding */
if (udhl) {
o[p++] = udhl;
while (udhl--) {
o[p++] = *udh++;
if (p >= SMSLEN_8) {
return p;
}
}
}
while (udl--) {
long u;
u = *ud++;
o[p++] = (u >> 8);
if (p >= SMSLEN_8) {
return p - 1; /* could not fit last character */
}
o[p++] = u;
if (p >= SMSLEN_8) {
return p;
}
}
return p;
}
/*! \brief general pack, with length and data,
returns number of bytes of target used */
static int packsms(unsigned char dcs, unsigned char *base, unsigned int udhl, unsigned char *udh, int udl, unsigned short *ud)
{
unsigned char *p = base;
if (udl == 0) {
*p++ = 0; /* no user data */
} else {
int l = 0;
if (is7bit(dcs)) { /* 7 bit */
if ((l = packsms7(p + 1, udhl, udh, udl, ud)) < 0) {
l = 0;
}
*p++ = l;
p += (l * 7 + 7) / 8;
} else if (is8bit(dcs)) { /* 8 bit */
if ((l = packsms8(p + 1, udhl, udh, udl, ud)) < 0) {
l = 0;
}
*p++ = l;
p += l;
} else { /* UCS-2 */
if ((l = packsms16(p + 1, udhl, udh, udl, ud)) < 0) {
l = 0;
}
*p++ = l;
p += l;
}
}
return p - base;
}
/*! \brief pack a date and return */
static void packdate(unsigned char *o, time_t w)
{
struct ast_tm t;
struct timeval topack = { w, 0 };
int z;
ast_localtime(&topack, &t, NULL);
#if defined(__FreeBSD__) || defined(__OpenBSD__) || defined( __NetBSD__ ) || defined(__APPLE__) || defined(__CYGWIN__)
z = -t.tm_gmtoff / 60 / 15;
#else
z = timezone / 60 / 15;
#endif
*o++ = ((t.tm_year % 10) << 4) + (t.tm_year % 100) / 10;
*o++ = (((t.tm_mon + 1) % 10) << 4) + (t.tm_mon + 1) / 10;
*o++ = ((t.tm_mday % 10) << 4) + t.tm_mday / 10;
*o++ = ((t.tm_hour % 10) << 4) + t.tm_hour / 10;
*o++ = ((t.tm_min % 10) << 4) + t.tm_min / 10;
*o++ = ((t.tm_sec % 10) << 4) + t.tm_sec / 10;
if (z < 0) {
*o++ = (((-z) % 10) << 4) + (-z) / 10 + 0x08;
} else {
*o++ = ((z % 10) << 4) + z / 10;
}
}
/*! \brief unpack a date and return */
static struct timeval unpackdate(unsigned char *i)
{
struct ast_tm t;
t.tm_year = 100 + (i[0] & 0xF) * 10 + (i[0] >> 4);
t.tm_mon = (i[1] & 0xF) * 10 + (i[1] >> 4) - 1;
t.tm_mday = (i[2] & 0xF) * 10 + (i[2] >> 4);
t.tm_hour = (i[3] & 0xF) * 10 + (i[3] >> 4);
t.tm_min = (i[4] & 0xF) * 10 + (i[4] >> 4);
t.tm_sec = (i[5] & 0xF) * 10 + (i[5] >> 4);
t.tm_isdst = 0;
if (i[6] & 0x08) {
t.tm_min += 15 * ((i[6] & 0x7) * 10 + (i[6] >> 4));
} else {
t.tm_min -= 15 * ((i[6] & 0x7) * 10 + (i[6] >> 4));
}
return ast_mktime(&t, NULL);
}
/*! \brief unpacks bytes (7 bit encoding) at i, len l septets,
and places in udh and ud setting udhl and udl. udh not used
if udhi not set */
static void unpacksms7(unsigned char *i, unsigned char l, unsigned char *udh, int *udhl, unsigned short *ud, int *udl, char udhi)
{
unsigned char b = 0, p = 0;
unsigned short *o = ud;
*udhl = 0;
if (udhi && l) { /* header */
int h = i[p];
*udhl = h;
if (h) {
b = 1;
p++;
l--;
while (h-- && l) {
*udh++ = i[p++];
b += 8;
while (b >= 7) {
b -= 7;
l--;
if (!l) {
break;
}
}
}
/* adjust for fill, septets */
if (b) {
b = 7 - b;
l--;
}
}
}
while (l--) {
unsigned char v;
if (b < 2) {
v = ((i[p] >> b) & 0x7F); /* everything in one byte */
} else {
v = ((((i[p] >> b) + (i[p + 1] << (8 - b)))) & 0x7F);
}
b += 7;
if (b >= 8) {
b -= 8;
p++;
}
/* 0x00A0 is the encoding of ESC (27) in defaultalphabet */
if (o > ud && o[-1] == 0x00A0 && escapes[v]) {
o[-1] = escapes[v];
} else {
*o++ = defaultalphabet[v];
}
}
*udl = (o - ud);
}
/*! \brief unpacks bytes (8 bit encoding) at i, len l septets,
* and places in udh and ud setting udhl and udl. udh not used
* if udhi not set.
*/
static void unpacksms8(unsigned char *i, unsigned char l, unsigned char *udh, int *udhl, unsigned short *ud, int *udl, char udhi)
{
unsigned short *o = ud;
*udhl = 0;
if (udhi) {
int n = *i;
*udhl = n;
if (n) {
i++;
l--;
while (l && n) {
l--;
n--;
*udh++ = *i++;
}
}
}
while (l--) {
*o++ = *i++; /* not to UTF-8 as explicitly 8 bit coding in DCS */
}
*udl = (o - ud);
}
/*! \brief unpacks bytes (16 bit encoding) at i, len l septets,
and places in udh and ud setting udhl and udl.
udh not used if udhi not set */
static void unpacksms16(unsigned char *i, unsigned char l, unsigned char *udh, int *udhl, unsigned short *ud, int *udl, char udhi)
{
unsigned short *o = ud;
*udhl = 0;
if (udhi) {
int n = *i;
*udhl = n;
if (n) {
i++;
l--;
while (l && n) {
l--;
n--;
*udh++ = *i++;
}
}
}
while (l--) {
int v = *i++;
if (l--) {
v = (v << 8) + *i++;
}
*o++ = v;
}
*udl = (o - ud);
}
/*! \brief general unpack - starts with length byte (octet or septet) and returns number of bytes used, inc length */
static int unpacksms(unsigned char dcs, unsigned char *i, unsigned char *udh, int *udhl, unsigned short *ud, int *udl, char udhi)
{
int l = *i++;
if (is7bit(dcs)) {
unpacksms7(i, l, udh, udhl, ud, udl, udhi);
l = (l * 7 + 7) / 8; /* adjust length to return */
} else if (is8bit(dcs)) {
unpacksms8(i, l, udh, udhl, ud, udl, udhi);
} else {
unpacksms16(i, l, udh, udhl, ud, udl, udhi);
}
return l + 1;
}
/*! \brief unpack an address from i, return byte length, unpack to o */
static unsigned char unpackaddress(char *o, unsigned char *i)
{
unsigned char l = i[0], p;
if (i[1] == 0x91) {
*o++ = '+';
}
for (p = 0; p < l; p++) {
if (p & 1) {
*o++ = (i[2 + p / 2] >> 4) + '0';
} else {
*o++ = (i[2 + p / 2] & 0xF) + '0';
}
}
*o = 0;
return (l + 5) / 2;
}
/*! \brief store an address at o, and return number of bytes used */
static unsigned char packaddress(unsigned char *o, char *i)
{
unsigned char p = 2;
o[0] = 0; /* number of bytes */
if (*i == '+') { /* record as bit 0 in byte 1 */
i++;
o[1] = 0x91;
} else {
o[1] = 0x81;
}
for ( ; *i ; i++) {
if (!isdigit(*i)) { /* ignore non-digits */
continue;
}
if (o[0] & 1) {
o[p++] |= ((*i & 0xF) << 4);
} else {
o[p] = (*i & 0xF);
}
o[0]++;
}
if (o[0] & 1) {
o[p++] |= 0xF0; /* pad */
}
return p;
}
/*! \brief Log the output, and remove file */
static void sms_log(sms_t * h, char status)
{
int o;
if (*h->oa == '\0' && *h->da == '\0') {
return;
}
o = open(log_file, O_CREAT | O_APPEND | O_WRONLY, AST_FILE_MODE);
if (o >= 0) {
char line[1000], mrs[3] = "", *p;
char buf[30];
unsigned char n;
if (h->mr >= 0) {
snprintf(mrs, sizeof(mrs), "%02X", h->mr);
}
snprintf(line, sizeof(line), "%s %c%c%c%s %s %s %s ",
isodate(time(NULL), buf, sizeof(buf)),
status, h->rx ? 'I' : 'O', h->smsc ? 'S' : 'M', mrs, h->queue,
S_OR(h->oa, "-"), S_OR(h->da, "-") );
p = line + strlen(line);
for (n = 0; n < h->udl; n++) {
if (h->ud[n] == '\\') {
*p++ = '\\';
*p++ = '\\';
} else if (h->ud[n] == '\n') {
*p++ = '\\';
*p++ = 'n';
} else if (h->ud[n] == '\r') {
*p++ = '\\';
*p++ = 'r';
} else if (h->ud[n] < 32 || h->ud[n] == 127) {
*p++ = 191;
} else {
*p++ = h->ud[n];
}
}
*p++ = '\n';
*p = 0;
if (write(o, line, strlen(line)) < 0) {
ast_log(LOG_WARNING, "write() failed: %s\n", strerror(errno));
}
close(o);
}
*h->oa = *h->da = h->udl = 0;
}
/*! \brief parse and delete a file */
static void sms_readfile(sms_t * h, char *fn)
{
char line[1000];
FILE *s;
char dcsset = 0; /* if DSC set */
ast_log(LOG_NOTICE, "Sending %s\n", fn);
h->rx = h->udl = *h->oa = *h->da = h->pid = h->srr = h->udhi = h->rp = h->vp = h->udhl = 0;
h->mr = -1;
h->dcs = 0xF1; /* normal messages class 1 */
h->scts = ast_tvnow();
s = fopen(fn, "r");
if (s) {
if (unlink(fn)) { /* concurrent access, we lost */
fclose(s);
return;
}
while (fgets (line, sizeof(line), s)) { /* process line in file */
char *p;
void *pp = &p;
for (p = line; *p && *p != '\n' && *p != '\r'; p++);
*p = 0; /* strip eoln */
p = line;
if (!*p || *p == ';') {
continue; /* blank line or comment, ignore */
}
while (isalnum(*p)) {
*p = tolower (*p);
p++;
}
while (isspace (*p)) {
*p++ = 0;
}
if (*p == '=') {
*p++ = 0;
if (!strcmp(line, "ud")) { /* parse message (UTF-8) */
unsigned char o = 0;
memcpy(h->udtxt, p, SMSLEN); /* for protocol 2 */
while (*p && o < SMSLEN) {
h->ud[o++] = utf8decode(pp);
}
h->udl = o;
if (*p) {
ast_log(LOG_WARNING, "UD too long in %s\n", fn);
}
} else {
while (isspace (*p)) {
p++;
}
if (!strcmp(line, "oa") && strlen(p) < sizeof(h->oa)) {
numcpy (h->oa, p);
} else if (!strcmp(line, "da") && strlen(p) < sizeof(h->oa)) {
numcpy (h->da, p);
} else if (!strcmp(line, "pid")) {
h->pid = atoi(p);
} else if (!strcmp(line, "dcs")) {
h->dcs = atoi(p);
dcsset = 1;
} else if (!strcmp(line, "mr")) {
h->mr = atoi(p);
} else if (!strcmp(line, "srr")) {
h->srr = (atoi(p) ? 1 : 0);
} else if (!strcmp(line, "vp")) {
h->vp = atoi(p);
} else if (!strcmp(line, "rp")) {
h->rp = (atoi(p) ? 1 : 0);
} else if (!strcmp(line, "scts")) { /* get date/time */
int Y, m, d, H, M, S;
/* XXX Why aren't we using ast_strptime here? */
if (sscanf(p, "%4d-%2d-%2dT%2d:%2d:%2d", &Y, &m, &d, &H, &M, &S) == 6) {
struct ast_tm t = { 0, };
t.tm_year = Y - 1900;
t.tm_mon = m - 1;
t.tm_mday = d;
t.tm_hour = H;
t.tm_min = M;
t.tm_sec = S;
t.tm_isdst = -1;
h->scts = ast_mktime(&t, NULL);
if (h->scts.tv_sec == 0) {
ast_log(LOG_WARNING, "Bad date/timein %s: %s", fn, p);
}
}
} else {
ast_log(LOG_WARNING, "Cannot parse in %s: %s=%si\n", fn, line, p);
}
}
} else if (*p == '#') { /* raw hex format */
*p++ = 0;
if (*p == '#') {
p++;
if (!strcmp(line, "ud")) { /* user data */
int o = 0;
while (*p && o < SMSLEN) {
if (isxdigit(*p) && isxdigit(p[1]) && isxdigit(p[2]) && isxdigit(p[3])) {
h->ud[o++] =
(((isalpha(*p) ? 9 : 0) + (*p & 0xF)) << 12) +
(((isalpha(p[1]) ? 9 : 0) + (p[1] & 0xF)) << 8) +
(((isalpha(p[2]) ? 9 : 0) + (p[2] & 0xF)) << 4) + ((isalpha(p[3]) ? 9 : 0) + (p[3] & 0xF));
p += 4;
} else
break;
}
h->udl = o;
if (*p)
ast_log(LOG_WARNING, "UD too long / invalid UCS-2 hex in %s\n", fn);
} else
ast_log(LOG_WARNING, "Only ud can use ## format, %s\n", fn);
} else if (!strcmp(line, "ud")) { /* user data */
int o = 0;
while (*p && o < SMSLEN) {
if (isxdigit(*p) && isxdigit(p[1])) {
h->ud[o++] = (((isalpha(*p) ? 9 : 0) + (*p & 0xF)) << 4) + ((isalpha(p[1]) ? 9 : 0) + (p[1] & 0xF));
p += 2;
} else {
break;
}
}
h->udl = o;
if (*p) {
ast_log(LOG_WARNING, "UD too long / invalid UCS-1 hex in %s\n", fn);
}
} else if (!strcmp(line, "udh")) { /* user data header */
unsigned char o = 0;
h->udhi = 1;
while (*p && o < SMSLEN) {
if (isxdigit(*p) && isxdigit(p[1])) {
h->udh[o] = (((isalpha(*p) ? 9 : 0) + (*p & 0xF)) << 4) + ((isalpha(p[1]) ? 9 : 0) + (p[1] & 0xF));
o++;
p += 2;
} else {
break;
}
}
h->udhl = o;
if (*p) {
ast_log(LOG_WARNING, "UDH too long / invalid hex in %s\n", fn);
}
} else {
ast_log(LOG_WARNING, "Only ud and udh can use # format, %s\n", fn);
}
} else {
ast_log(LOG_WARNING, "Cannot parse in %s: %s\n", fn, line);
}
}
fclose(s);
if (!dcsset && packsms7(0, h->udhl, h->udh, h->udl, h->ud) < 0) {
if (packsms8(0, h->udhl, h->udh, h->udl, h->ud) < 0) {
if (packsms16(0, h->udhl, h->udh, h->udl, h->ud) < 0) {
ast_log(LOG_WARNING, "Invalid UTF-8 message even for UCS-2 (%s)\n", fn);
} else {
h->dcs = 0x08; /* default to 16 bit */
ast_log(LOG_WARNING, "Sending in 16 bit format(%s)\n", fn);
}
} else {
h->dcs = 0xF5; /* default to 8 bit */
ast_log(LOG_WARNING, "Sending in 8 bit format(%s)\n", fn);
}
}
if (is7bit(h->dcs) && packsms7(0, h->udhl, h->udh, h->udl, h->ud) < 0) {
ast_log(LOG_WARNING, "Invalid 7 bit GSM data %s\n", fn);
}
if (is8bit(h->dcs) && packsms8(0, h->udhl, h->udh, h->udl, h->ud) < 0) {
ast_log(LOG_WARNING, "Invalid 8 bit data %s\n", fn);
}
if (is16bit(h->dcs) && packsms16(0, h->udhl, h->udh, h->udl, h->ud) < 0) {
ast_log(LOG_WARNING, "Invalid 16 bit data %s\n", fn);
}
}
}
/*! \brief white a received text message to a file */
static void sms_writefile(sms_t * h)
{
char fn[200] = "", fn2[200] = "";
char buf[30];
FILE *o;
if (ast_tvzero(h->scts)) {
h->scts = ast_tvnow();
}
snprintf(fn, sizeof(fn), "%s/sms/%s", ast_config_AST_SPOOL_DIR, h->smsc ? h->rx ? "morx" : "mttx" : h->rx ? "mtrx" : "motx");
ast_mkdir(fn, 0777); /* ensure it exists */
ast_copy_string(fn2, fn, sizeof(fn2));
snprintf(fn2 + strlen(fn2), sizeof(fn2) - strlen(fn2), "/%s.%s-%d", h->queue, isodate(h->scts.tv_sec, buf, sizeof(buf)), seq++);
snprintf(fn + strlen(fn), sizeof(fn) - strlen(fn), "/.%s", fn2 + strlen(fn) + 1);
if ((o = fopen(fn, "w")) == NULL) {
return;
}
if (*h->oa) {
fprintf(o, "oa=%s\n", h->oa);
}
if (*h->da) {
fprintf(o, "da=%s\n", h->da);
}
if (h->udhi) {
unsigned int p;
fprintf(o, "udh#");
for (p = 0; p < h->udhl; p++) {
fprintf(o, "%02X", h->udh[p]);
}
fprintf(o, "\n");
}
if (h->udl) {
unsigned int p;
for (p = 0; p < h->udl && h->ud[p] >= ' '; p++);
if (p < h->udl) {
fputc(';', o); /* cannot use ud=, but include as a comment for human readable */
}
fprintf(o, "ud=");
for (p = 0; p < h->udl; p++) {
unsigned short v = h->ud[p];
if (v < 32) {
fputc(191, o);
} else if (v < 0x80) {
fputc(v, o);
} else if (v < 0x800) {
fputc(0xC0 + (v >> 6), o);
fputc(0x80 + (v & 0x3F), o);
} else {
fputc(0xE0 + (v >> 12), o);
fputc(0x80 + ((v >> 6) & 0x3F), o);
fputc(0x80 + (v & 0x3F), o);
}
}
fprintf(o, "\n");
for (p = 0; p < h->udl && h->ud[p] >= ' '; p++);
if (p < h->udl) {
for (p = 0; p < h->udl && h->ud[p] < 0x100; p++);
if (p == h->udl) { /* can write in ucs-1 hex */
fprintf(o, "ud#");
for (p = 0; p < h->udl; p++) {
fprintf(o, "%02X", h->ud[p]);
}
fprintf(o, "\n");
} else { /* write in UCS-2 */
fprintf(o, "ud##");
for (p = 0; p < h->udl; p++) {
fprintf(o, "%04X", h->ud[p]);
}
fprintf(o, "\n");
}
}
}
if (h->scts.tv_sec) {
char datebuf[30];
fprintf(o, "scts=%s\n", isodate(h->scts.tv_sec, datebuf, sizeof(datebuf)));
}
if (h->pid) {
fprintf(o, "pid=%d\n", h->pid);
}
if (h->dcs != 0xF1) {
fprintf(o, "dcs=%d\n", h->dcs);
}
if (h->vp) {
fprintf(o, "vp=%d\n", h->vp);
}
if (h->srr) {
fprintf(o, "srr=1\n");
}
if (h->mr >= 0) {
fprintf(o, "mr=%d\n", h->mr);
}
if (h->rp) {
fprintf(o, "rp=1\n");
}
fclose(o);
if (rename(fn, fn2)) {
unlink(fn);
} else {
ast_log(LOG_NOTICE, "Received to %s\n", fn2);
}
}
/*! \brief read dir skipping dot files... */
static struct dirent *readdirqueue(DIR *d, char *queue)
{
struct dirent *f;
do {
f = readdir(d);
} while (f && (*f->d_name == '.' || strncmp(f->d_name, queue, strlen(queue)) || f->d_name[strlen(queue)] != '.'));
return f;
}
/*! \brief handle the incoming message */
static unsigned char sms_handleincoming (sms_t * h)
{
unsigned char p = 3;
if (h->smsc) { /* SMSC */
if ((h->imsg[2] & 3) == 1) { /* SMS-SUBMIT */
h->udhl = h->udl = 0;
h->vp = 0;
h->srr = ((h->imsg[2] & 0x20) ? 1 : 0);
h->udhi = ((h->imsg[2] & 0x40) ? 1 : 0);
h->rp = ((h->imsg[2] & 0x80) ? 1 : 0);
ast_copy_string(h->oa, h->cli, sizeof(h->oa));
h->scts = ast_tvnow();
h->mr = h->imsg[p++];
p += unpackaddress(h->da, h->imsg + p);
h->pid = h->imsg[p++];
h->dcs = h->imsg[p++];
if ((h->imsg[2] & 0x18) == 0x10) { /* relative VP */
if (h->imsg[p] < 144) {
h->vp = (h->imsg[p] + 1) * 5;
} else if (h->imsg[p] < 168) {
h->vp = 720 + (h->imsg[p] - 143) * 30;
} else if (h->imsg[p] < 197) {
h->vp = (h->imsg[p] - 166) * 1440;
} else {
h->vp = (h->imsg[p] - 192) * 10080;
}
p++;
} else if (h->imsg[2] & 0x18) {
p += 7; /* ignore enhanced / absolute VP */
}
p += unpacksms(h->dcs, h->imsg + p, h->udh, &h->udhl, h->ud, &h->udl, h->udhi);
h->rx = 1; /* received message */
sms_writefile(h); /* write the file */
if (p != h->imsg[1] + 2) {
ast_log(LOG_WARNING, "Mismatch receive unpacking %d/%d\n", p, h->imsg[1] + 2);
return 0xFF; /* duh! */
}
} else {
ast_log(LOG_WARNING, "Unknown message type %02X\n", h->imsg[2]);
return 0xFF;
}
} else { /* client */
if (!(h->imsg[2] & 3)) { /* SMS-DELIVER */
*h->da = h->srr = h->rp = h->vp = h->udhi = h->udhl = h->udl = 0;
h->srr = ((h->imsg[2] & 0x20) ? 1 : 0);
h->udhi = ((h->imsg[2] & 0x40) ? 1 : 0);
h->rp = ((h->imsg[2] & 0x80) ? 1 : 0);
h->mr = -1;
p += unpackaddress(h->oa, h->imsg + p);
h->pid = h->imsg[p++];
h->dcs = h->imsg[p++];
h->scts = unpackdate(h->imsg + p);
p += 7;
p += unpacksms(h->dcs, h->imsg + p, h->udh, &h->udhl, h->ud, &h->udl, h->udhi);
h->rx = 1; /* received message */
sms_writefile(h); /* write the file */
if (p != h->imsg[1] + 2) {
ast_log(LOG_WARNING, "Mismatch receive unpacking %d/%d\n", p, h->imsg[1] + 2);
return 0xFF; /* duh! */
}
} else {
ast_log(LOG_WARNING, "Unknown message type %02X\n", h->imsg[2]);
return 0xFF;
}
}
return 0; /* no error */
}
#ifdef SOLARIS
#define NAME_MAX 1024
#endif
/*!
* Add data to a protocol 2 message.
* Use the length field (h->omsg[1]) as a pointer to the next free position.
*/
static void adddata_proto2(sms_t *h, unsigned char msg, char *data, int size)
{
int x = h->omsg[1] + 2; /* Get current position */
if (x == 2) {
x += 2; /* First: skip Payload length (set later) */
}
h->omsg[x++] = msg; /* Message code */
h->omsg[x++] = (unsigned char)size; /* Data size Low */
h->omsg[x++] = 0; /* Data size Hi */
for (; size > 0 ; size--) {
h->omsg[x++] = *data++;
}
h->omsg[1] = x - 2; /* Frame size */
h->omsg[2] = x - 4; /* Payload length (Lo) */
h->omsg[3] = 0; /* Payload length (Hi) */
}
static void putdummydata_proto2(sms_t *h)
{
adddata_proto2(h, 0x10, "\0", 1); /* Media Identifier > SMS */
adddata_proto2(h, 0x11, "\0\0\0\0\0\0", 6); /* Firmware version */
adddata_proto2(h, 0x12, "\2\0\4", 3); /* SMS provider ID */
adddata_proto2(h, 0x13, h->udtxt, h->udl); /* Body */
}
static void sms_compose2(sms_t *h, int more)
{
struct ast_tm tm;
struct timeval now = h->scts;
char stm[9];
h->omsg[0] = 0x00; /* set later... */
h->omsg[1] = 0;
putdummydata_proto2(h);
if (h->smsc) { /* deliver */
h->omsg[0] = 0x11; /* SMS_DELIVERY */
/* Required: 10 11 12 13 14 15 17 (seems they must be ordered!) */
ast_localtime(&now, &tm, NULL);
sprintf(stm, "%02d%02d%02d%02d", tm.tm_mon + 1, tm.tm_mday, tm.tm_hour, tm.tm_min); /* Date mmddHHMM */
adddata_proto2(h, 0x14, stm, 8); /* Date */
if (*h->oa == 0) {
strcpy(h->oa, "00000000");
}
adddata_proto2(h, 0x15, h->oa, strlen(h->oa)); /* Originator */
adddata_proto2(h, 0x17, "\1", 1); /* Calling Terminal ID */
} else { /* submit */
h->omsg[0] = 0x10; /* SMS_SUBMIT */
/* Required: 10 11 12 13 17 18 1B 1C (seems they must be ordered!) */
adddata_proto2(h, 0x17, "\1", 1); /* Calling Terminal ID */
if (*h->da == 0) {
strcpy(h->da, "00000000");
}
adddata_proto2(h, 0x18, h->da, strlen(h->da)); /* Originator */
adddata_proto2(h, 0x1B, "\1", 1); /* Called Terminal ID */
adddata_proto2(h, 0x1C, "\0\0\0", 3); /* Notification */
}
}
static void putdummydata_proto2(sms_t *h);
#define MAX_DEBUG_LEN 300
static char *sms_hexdump(unsigned char buf[], int size, char *s /* destination */)
{
char *p;
int f;
for (p = s, f = 0; f < size && f < MAX_DEBUG_LEN; f++, p += 3) {
sprintf(p, "%02X ", (unsigned char)buf[f]);
}
return(s);
}
/*! \brief sms_handleincoming_proto2: handle the incoming message */
static int sms_handleincoming_proto2(sms_t *h)
{
int f, i, sz = 0;
int msg, msgsz;
struct ast_tm tm;
struct timeval now = { 0, 0 };
char debug_buf[MAX_DEBUG_LEN * 3 + 1];
sz = h->imsg[1] + 2;
/* ast_verb(3, "SMS-P2 Frame: %s\n", sms_hexdump(h->imsg, sz, debug_buf)); */
/* Parse message body (called payload) */
now = h->scts = ast_tvnow();
for (f = 4; f < sz; ) {
msg = h->imsg[f++];
msgsz = h->imsg[f++];
msgsz += (h->imsg[f++] * 256);
switch (msg) {
case 0x13: /* Body */
ast_verb(3, "SMS-P2 Body#%02X=[%.*s]\n", msg, msgsz, &h->imsg[f]);
if (msgsz >= sizeof(h->imsg)) {
msgsz = sizeof(h->imsg) - 1;
}
for (i = 0; i < msgsz; i++) {
h->ud[i] = h->imsg[f + i];
}
h->udl = msgsz;
break;
case 0x14: /* Date SCTS */
now = h->scts = ast_tvnow();
ast_localtime(&now, &tm, NULL);
tm.tm_mon = ( (h->imsg[f] * 10) + h->imsg[f + 1] ) - 1;
tm.tm_mday = ( (h->imsg[f + 2] * 10) + h->imsg[f + 3] );
tm.tm_hour = ( (h->imsg[f + 4] * 10) + h->imsg[f + 5] );
tm.tm_min = ( (h->imsg[f + 6] * 10) + h->imsg[f + 7] );
tm.tm_sec = 0;
h->scts = ast_mktime(&tm, NULL);
ast_verb(3, "SMS-P2 Date#%02X=%02d/%02d %02d:%02d\n", msg, tm.tm_mday, tm.tm_mon + 1, tm.tm_hour, tm.tm_min);
break;
case 0x15: /* Calling line (from SMSC) */
if (msgsz >= 20) {
msgsz = 20 - 1;
}
ast_verb(3, "SMS-P2 Origin#%02X=[%.*s]\n", msg, msgsz, &h->imsg[f]);
ast_copy_string(h->oa, (char *)(&h->imsg[f]), msgsz + 1);
break;
case 0x18: /* Destination(from TE/phone) */
if (msgsz >= 20) {
msgsz = 20 - 1;
}
ast_verb(3, "SMS-P2 Destination#%02X=[%.*s]\n", msg, msgsz, &h->imsg[f]);
ast_copy_string(h->da, (char *)(&h->imsg[f]), msgsz + 1);
break;
case 0x1C: /* Notify */
ast_verb(3, "SMS-P2 Notify#%02X=%s\n", msg, sms_hexdump(&h->imsg[f], 3, debug_buf));
break;
default:
ast_verb(3, "SMS-P2 Par#%02X [%d]: %s\n", msg, msgsz, sms_hexdump(&h->imsg[f], msgsz, debug_buf));
break;
}
f+=msgsz; /* Skip to next */
}
h->rx = 1; /* received message */
sms_writefile(h); /* write the file */
return 0; /* no error */
}
#if 0
static void smssend(sms_t *h, char *c)
{
int f, x;
for (f = 0; f < strlen(c); f++) {
sscanf(&c[f*3], "%x", &x);
h->omsg[f] = x;
}
sms_messagetx(h);
}
#endif
static void sms_nextoutgoing (sms_t *h);
static void sms_messagerx2(sms_t * h)
{
int p = h->imsg[0] & DLL_SMS_MASK ; /* mask the high bit */
int cause;
#define DLL2_ACK(h) ((h->framenumber & 1) ? DLL2_SMS_ACK1: DLL2_SMS_ACK1)
switch (p) {
case DLL2_SMS_EST: /* Protocol 2: Connection ready (fake): send message */
sms_nextoutgoing (h);
/* smssend(h,"11 29 27 00 10 01 00 00 11 06 00 00 00 00 00 00 00 12 03 00 02 00 04 13 01 00 41 14 08 00 30 39 31 35 30 02 30 02 15 02 00 39 30 "); */
break;
case DLL2_SMS_INFO_MO: /* transport SMS_SUBMIT */
case DLL2_SMS_INFO_MT: /* transport SMS_DELIVERY */
cause = sms_handleincoming_proto2(h);
if (!cause) { /* ACK */
sms_log(h, 'Y');
}
h->omsg[0] = DLL2_ACK(h);
h->omsg[1] = 0x06; /* msg len */
h->omsg[2] = 0x04; /* payload len */
h->omsg[3] = 0x00; /* payload len */
h->omsg[4] = 0x1f; /* Response type */
h->omsg[5] = 0x01; /* parameter len */
h->omsg[6] = 0x00; /* parameter len */
h->omsg[7] = cause; /* CONFIRM or error */
sms_messagetx(h);
break;
case DLL2_SMS_NACK: /* Protocol 2: SMS_NAK */
h->omsg[0] = DLL2_SMS_REL; /* SMS_REL */
h->omsg[1] = 0x00; /* msg len */
sms_messagetx(h);
break;
case DLL2_SMS_ACK0:
case DLL2_SMS_ACK1:
/* SMS_ACK also transport SMS_SUBMIT or SMS_DELIVERY */
if ( (h->omsg[0] & DLL_SMS_MASK) == DLL2_SMS_REL) {
/* a response to our Release, just hangup */
h->hangup = 1; /* hangup */
} else {
/* XXX depending on what we are.. */
ast_log(LOG_NOTICE, "SMS_SUBMIT or SMS_DELIVERY");
sms_nextoutgoing (h);
}
break;
case DLL2_SMS_REL: /* Protocol 2: SMS_REL (hangup req) */
h->omsg[0] = DLL2_ACK(h);
h->omsg[1] = 0;
sms_messagetx(h);
break;
}
}
/*! \brief compose a message for protocol 1 */
static void sms_compose1(sms_t *h, int more)
{
unsigned int p = 2; /* next byte to write. Skip type and len */
h->omsg[0] = 0x91; /* SMS_DATA */
if (h->smsc) { /* deliver */
h->omsg[p++] = (more ? 4 : 0) + ((h->udhl > 0) ? 0x40 : 0);
p += packaddress(h->omsg + p, h->oa);
h->omsg[p++] = h->pid;
h->omsg[p++] = h->dcs;
packdate(h->omsg + p, h->scts.tv_sec);
p += 7;
p += packsms(h->dcs, h->omsg + p, h->udhl, h->udh, h->udl, h->ud);
} else { /* submit */
h->omsg[p++] =
0x01 + (more ? 4 : 0) + (h->srr ? 0x20 : 0) + (h->rp ? 0x80 : 0) + (h->vp ? 0x10 : 0) + (h->udhi ? 0x40 : 0);
if (h->mr < 0) {
h->mr = message_ref++;
}
h->omsg[p++] = h->mr;
p += packaddress(h->omsg + p, h->da);
h->omsg[p++] = h->pid;
h->omsg[p++] = h->dcs;
if (h->vp) { /* relative VP */
if (h->vp < 720) {
h->omsg[p++] = (h->vp + 4) / 5 - 1;
} else if (h->vp < 1440) {
h->omsg[p++] = (h->vp - 720 + 29) / 30 + 143;
} else if (h->vp < 43200) {
h->omsg[p++] = (h->vp + 1439) / 1440 + 166;
} else if (h->vp < 635040) {
h->omsg[p++] = (h->vp + 10079) / 10080 + 192;
} else {
h->omsg[p++] = 255; /* max */
}
}
p += packsms(h->dcs, h->omsg + p, h->udhl, h->udh, h->udl, h->ud);
}
h->omsg[1] = p - 2;
}
/*! \brief find and fill in next message, or send a REL if none waiting */
static void sms_nextoutgoing (sms_t * h)
{
char fn[100 + NAME_MAX] = "";
DIR *d;
char more = 0;
*h->da = *h->oa = '\0'; /* clear destinations */
h->rx = 0; /* outgoing message */
snprintf(fn, sizeof(fn), "%s/sms/%s", ast_config_AST_SPOOL_DIR, h->smsc ? "mttx" : "motx");
ast_mkdir(fn, 0777); /* ensure it exists */
d = opendir(fn);
if (d) {
struct dirent *f = readdirqueue(d, h->queue);
if (f) {
snprintf(fn + strlen(fn), sizeof(fn) - strlen(fn), "/%s", f->d_name);
sms_readfile(h, fn);
if (readdirqueue(d, h->queue)) {
more = 1; /* more to send */
}
}
closedir(d);
}
if (*h->da || *h->oa) { /* message to send */
if (h->protocol == 2) {
sms_compose2(h, more);
} else {
sms_compose1(h, more);
}
} else { /* no message */
if (h->protocol == 2) {
h->omsg[0] = 0x17; /* SMS_REL */
h->omsg[1] = 0;
} else {
h->omsg[0] = 0x94; /* SMS_REL */
h->omsg[1] = 0;
}
}
sms_messagetx(h);
}
#define DIR_RX 1
#define DIR_TX 2
static void sms_debug (int dir, sms_t *h)
{
char txt[259 * 3 + 1];
char *p = txt; /* always long enough */
unsigned char *msg = (dir == DIR_RX) ? h->imsg : h->omsg;
int n = (dir == DIR_RX) ? h->ibytep : msg[1] + 2;
int q = 0;
while (q < n && q < 30) {
sprintf(p, " %02X", msg[q++]);
p += 3;
}
if (q < n) {
sprintf(p, "...");
}
ast_verb(3, "SMS %s%s\n", dir == DIR_RX ? "RX" : "TX", txt);
}
static void sms_messagerx(sms_t * h)
{
int cause;
sms_debug (DIR_RX, h);
if (h->protocol == 2) {
sms_messagerx2(h);
return;
}
/* parse incoming message for Protocol 1 */
switch (h->imsg[0]) {
case 0x91: /* SMS_DATA */
cause = sms_handleincoming (h);
if (!cause) {
sms_log(h, 'Y');
h->omsg[0] = 0x95; /* SMS_ACK */
h->omsg[1] = 0x02;
h->omsg[2] = 0x00; /* deliver report */
h->omsg[3] = 0x00; /* no parameters */
} else { /* NACK */
sms_log(h, 'N');
h->omsg[0] = 0x96; /* SMS_NACK */
h->omsg[1] = 3;
h->omsg[2] = 0; /* delivery report */
h->omsg[3] = cause; /* cause */
h->omsg[4] = 0; /* no parameters */
}
sms_messagetx(h);
break;
case 0x92: /* SMS_ERROR */
h->err = 1;
sms_messagetx(h); /* send whatever we sent again */
break;
case 0x93: /* SMS_EST */
sms_nextoutgoing (h);
break;
case 0x94: /* SMS_REL */
h->hangup = 1; /* hangup */
break;
case 0x95: /* SMS_ACK */
sms_log(h, 'Y');
sms_nextoutgoing (h);
break;
case 0x96: /* SMS_NACK */
h->err = 1;
sms_log(h, 'N');
sms_nextoutgoing (h);
break;
default: /* Unknown */
h->omsg[0] = 0x92; /* SMS_ERROR */
h->omsg[1] = 1;
h->omsg[2] = 3; /* unknown message type */
sms_messagetx(h);
break;
}
}
static void sms_messagetx(sms_t * h)
{
unsigned char c = 0, p;
int len = h->omsg[1] + 2; /* total message length excluding checksum */
for (p = 0; p < len; p++) { /* compute checksum */
c += h->omsg[p];
}
h->omsg[len] = 0 - c; /* actually, (256 - (c & 0fxx)) & 0xff) */
sms_debug(DIR_TX, h);
h->framenumber++; /* Proto 2 */
h->obytep = 0;
h->obitp = 0;
if (h->protocol == 2) { /* Proto 2: */
h->oseizure = 300; /* 300bits (or more ?) */
h->obyte = 0; /* Seizure starts with space (0) */
if (h->omsg[0] == 0x7F) {
h->opause = 8 * h->opause_0; /* initial message delay */
} else {
h->opause = 400;
}
} else { /* Proto 1: */
h->oseizure = 0; /* No seizure */
h->obyte = 1; /* send mark ('1') at the beginning */
/* Change the initial message delay. BT requires 300ms,
* but for others this might be way too much and the phone
* could time out. XXX make it configurable.
*/
if (h->omsg[0] == 0x93) {
h->opause = 8 * h->opause_0; /* initial message delay */
} else {
h->opause = 200;
}
}
/* Note - setting osync triggers the generator */
h->osync = OSYNC_BITS; /* 80 sync bits */
h->obyten = len + 1; /* bytes to send (including checksum) */
}
/*!
* outgoing data are produced by this generator function, that reads from
* the descriptor whether it has data to send and which ones.
*/
static int sms_generate(struct ast_channel *chan, void *data, int len, int samples)
{
struct ast_frame f = { 0 };
#define MAXSAMPLES (800)
output_t *buf;
sms_t *h = data;
int i;
if (samples > MAXSAMPLES) {
ast_log(LOG_WARNING, "Only doing %d samples (%d requested)\n",
MAXSAMPLES, samples);
samples = MAXSAMPLES;
}
len = samples * sizeof(*buf) + AST_FRIENDLY_OFFSET;
buf = alloca(len);
f.frametype = AST_FRAME_VOICE;
ast_format_set(&f.subclass.format, __OUT_FMT, 0);
f.datalen = samples * sizeof(*buf);
f.offset = AST_FRIENDLY_OFFSET;
f.mallocd = 0;
f.data.ptr = buf;
f.samples = samples;
f.src = "app_sms";
/* create a buffer containing the digital sms pattern */
for (i = 0; i < samples; i++) {
buf[i] = wave_out[0]; /* default is silence */
if (h->opause) {
h->opause--;
} else if (h->obyten || h->osync) { /* sending data */
buf[i] = wave_out[h->ophase];
h->ophase += (h->obyte & 1) ? 13 : 21; /* compute next phase */
if (h->ophase >= 80)
h->ophase -= 80;
if ((h->ophasep += 12) >= 80) { /* time to send the next bit */
h->ophasep -= 80;
if (h->oseizure > 0) { /* sending channel seizure (proto 2) */
h->oseizure--;
h->obyte ^= 1; /* toggle low bit */
} else if (h->osync) {
h->obyte = 1; /* send mark as sync bit */
h->osync--; /* sending sync bits */
if (h->osync == 0 && h->protocol == 2 && h->omsg[0] == DLL2_SMS_EST) {
h->obytep = h->obyten = 0; /* we are done */
}
} else {
h->obitp++;
if (h->obitp == 1) {
h->obyte = 0; /* start bit; */
} else if (h->obitp == 2) {
h->obyte = h->omsg[h->obytep];
} else if (h->obitp == 10) {
h->obyte = 1; /* stop bit */
h->obitp = 0;
h->obytep++;
if (h->obytep == h->obyten) {
h->obytep = h->obyten = 0; /* sent */
h->osync = 10; /* trailing marks */
}
} else {
h->obyte >>= 1;
}
}
}
}
}
if (ast_write(chan, &f) < 0) {
ast_log(LOG_WARNING, "Failed to write frame to '%s': %s\n", chan->name, strerror(errno));
return -1;
}
return 0;
#undef MAXSAMPLES
}
/*!
* Just return the pointer to the descriptor that we received.
*/
static void *sms_alloc(struct ast_channel *chan, void *sms_t_ptr)
{
return sms_t_ptr;
}
static void sms_release(struct ast_channel *chan, void *data)
{
return; /* nothing to do here. */
}
static struct ast_generator smsgen = {
.alloc = sms_alloc,
.release = sms_release,
.generate = sms_generate,
};
/*!
* Process an incoming frame, trying to detect the carrier and
* decode the message. The two frequencies are 1300 and 2100 Hz.
* The decoder detects the amplitude of the signal over the last
* few samples, filtering the absolute values with a lowpass filter.
* If the magnitude (h->imag) is large enough, multiply the signal
* by the two carriers, and compute the amplitudes m0 and m1.
* Record the current sample as '0' or '1' depending on which one is greater.
* The last 3 bits are stored in h->ibith, with the count of '1'
* bits in h->ibitt.
* XXX the rest is to be determined.
*/
static void sms_process(sms_t * h, int samples, signed short *data)
{
int bit;
/*
* Ignore incoming audio while a packet is being transmitted,
* the protocol is half-duplex.
* Unfortunately this means that if the outbound and incoming
* transmission overlap (which is an error condition anyways),
* we may miss some data and this makes debugging harder.
*/
if (h->obyten || h->osync) {
return;
}
for ( ; samples-- ; data++) {
unsigned long long m0, m1;
if (abs(*data) > h->imag) {
h->imag = abs(*data);
} else {
h->imag = h->imag * 7 / 8;
}
if (h->imag <= 500) { /* below [arbitrary] threahold: lost carrier */
if (h->idle++ == 80000) { /* nothing happening */
ast_log(LOG_NOTICE, "No data, hanging up\n");
h->hangup = 1;
h->err = 1;
}
if (h->ierr) { /* error */
ast_log(LOG_NOTICE, "Error %d, hanging up\n", h->ierr);
/* Protocol 1 */
h->err = 1;
h->omsg[0] = 0x92; /* error */
h->omsg[1] = 1;
h->omsg[2] = h->ierr;
sms_messagetx(h); /* send error */
}
h->ierr = h->ibitn = h->ibytep = h->ibytec = 0;
continue;
}
h->idle = 0;
/* multiply signal by the two carriers. */
h->ims0 = (h->ims0 * 6 + *data * wave[h->ips0]) / 7;
h->imc0 = (h->imc0 * 6 + *data * wave[h->ipc0]) / 7;
h->ims1 = (h->ims1 * 6 + *data * wave[h->ips1]) / 7;
h->imc1 = (h->imc1 * 6 + *data * wave[h->ipc1]) / 7;
/* compute the amplitudes */
m0 = h->ims0 * h->ims0 + h->imc0 * h->imc0;
m1 = h->ims1 * h->ims1 + h->imc1 * h->imc1;
/* advance the sin/cos pointers */
if ((h->ips0 += 21) >= 80) {
h->ips0 -= 80;
}
if ((h->ipc0 += 21) >= 80) {
h->ipc0 -= 80;
}
if ((h->ips1 += 13) >= 80) {
h->ips1 -= 80;
}
if ((h->ipc1 += 13) >= 80) {
h->ipc1 -= 80;
}
/* set new bit to 1 or 0 depending on which value is stronger */
h->ibith <<= 1;
if (m1 > m0) {
h->ibith |= 1;
}
if (h->ibith & 8) {
h->ibitt--;
}
if (h->ibith & 1) {
h->ibitt++;
}
bit = ((h->ibitt > 1) ? 1 : 0);
if (bit != h->ibitl) {
h->ibitc = 1;
} else {
h->ibitc++;
}
h->ibitl = bit;
if (!h->ibitn && h->ibitc == 4 && !bit) {
h->ibitn = 1;
h->iphasep = 0;
}
if (bit && h->ibitc == 200) { /* sync, restart message */
/* Protocol 2: empty connection ready (I am master) */
if (h->framenumber < 0 && h->ibytec >= 160 && !memcmp(h->imsg, "UUUUUUUUUUUUUUUUUUUU", 20)) {
h->framenumber = 1;
ast_verb(3, "SMS protocol 2 detected\n");
h->protocol = 2;
h->imsg[0] = 0xff; /* special message (fake) */
h->imsg[1] = h->imsg[2] = 0x00;
h->ierr = h->ibitn = h->ibytep = h->ibytec = 0;
sms_messagerx(h);
}
h->ierr = h->ibitn = h->ibytep = h->ibytec = 0;
}
if (h->ibitn) {
h->iphasep += 12;
if (h->iphasep >= 80) { /* next bit */
h->iphasep -= 80;
if (h->ibitn++ == 9) { /* end of byte */
if (!bit) { /* bad stop bit */
ast_log(LOG_NOTICE, "bad stop bit");
h->ierr = 0xFF; /* unknown error */
} else {
if (h->ibytep < sizeof(h->imsg)) {
h->imsg[h->ibytep] = h->ibytev;
h->ibytec += h->ibytev;
h->ibytep++;
} else if (h->ibytep == sizeof(h->imsg)) {
ast_log(LOG_NOTICE, "msg too large");
h->ierr = 2; /* bad message length */
}
if (h->ibytep > 1 && h->ibytep == 3 + h->imsg[1] && !h->ierr) {
if (!h->ibytec) {
sms_messagerx(h);
} else {
ast_log(LOG_NOTICE, "bad checksum");
h->ierr = 1; /* bad checksum */
}
}
}
h->ibitn = 0;
}
h->ibytev = (h->ibytev >> 1) + (bit ? 0x80 : 0);
}
}
}
}
/*
* Standard argument parsing:
* - one enum for the flags we recognise,
* - one enum for argument indexes
* - AST_APP_OPTIONS() to drive the parsing routine
* - in the function, AST_DECLARE_APP_ARGS(...) for the arguments.
*/
enum sms_flags {
OPTION_BE_SMSC = (1 << 0), /* act as sms center */
OPTION_ANSWER = (1 << 1), /* answer on incoming calls */
OPTION_TWO = (1 << 2), /* Use Protocol Two */
OPTION_PAUSE = (1 << 3), /* pause before sending data, in ms */
OPTION_SRR = (1 << 4), /* set srr */
OPTION_DCS = (1 << 5), /* set dcs */
};
enum sms_opt_args {
OPTION_ARG_PAUSE = 0,
OPTION_ARG_ARRAY_SIZE
};
AST_APP_OPTIONS(sms_options, {
AST_APP_OPTION('s', OPTION_BE_SMSC),
AST_APP_OPTION('a', OPTION_ANSWER),
AST_APP_OPTION('t', OPTION_TWO),
AST_APP_OPTION('r', OPTION_SRR),
AST_APP_OPTION('o', OPTION_DCS),
AST_APP_OPTION_ARG('p', OPTION_PAUSE, OPTION_ARG_PAUSE),
} );
static int sms_exec(struct ast_channel *chan, const char *data)
{
int res = -1;
sms_t h = { 0 };
/* argument parsing support */
struct ast_flags flags;
char *parse, *sms_opts[OPTION_ARG_ARRAY_SIZE] = { 0, };
char *p;
AST_DECLARE_APP_ARGS(sms_args,
AST_APP_ARG(queue);
AST_APP_ARG(options);
AST_APP_ARG(addr);
AST_APP_ARG(body);
);
if (!data) {
ast_log(LOG_ERROR, "Requires queue name at least\n");
return -1;
}
parse = ast_strdupa(data); /* create a local copy */
AST_STANDARD_APP_ARGS(sms_args, parse);
if (sms_args.argc > 1) {
ast_app_parse_options(sms_options, &flags, sms_opts, sms_args.options);
}
ast_verb(1, "sms argc %d queue <%s> opts <%s> addr <%s> body <%s>\n",
sms_args.argc, S_OR(sms_args.queue, ""),
S_OR(sms_args.options, ""),
S_OR(sms_args.addr, ""),
S_OR(sms_args.body, "") );
h.ipc0 = h.ipc1 = 20; /* phase for cosine */
h.dcs = 0xF1; /* default */
ast_copy_string(h.cli,
S_COR(chan->caller.id.number.valid, chan->caller.id.number.str, ""),
sizeof(h.cli));
if (ast_strlen_zero(sms_args.queue)) {
ast_log(LOG_ERROR, "Requires queue name\n");
goto done;
}
if (strlen(sms_args.queue) >= sizeof(h.queue)) {
ast_log(LOG_ERROR, "Queue name too long\n");
goto done;
}
ast_copy_string(h.queue, sms_args.queue, sizeof(h.queue));
for (p = h.queue; *p; p++) {
if (!isalnum(*p)) {
*p = '-'; /* make very safe for filenames */
}
}
h.smsc = ast_test_flag(&flags, OPTION_BE_SMSC);
h.protocol = ast_test_flag(&flags, OPTION_TWO) ? 2 : 1;
if (!ast_strlen_zero(sms_opts[OPTION_ARG_PAUSE])) {
h.opause_0 = atoi(sms_opts[OPTION_ARG_PAUSE]);
}
if (h.opause_0 < 25 || h.opause_0 > 2000) {
h.opause_0 = 300; /* default 300ms */
}
ast_verb(1, "initial delay %dms\n", h.opause_0);
/* the following apply if there is an arg3/4 and apply to the created message file */
if (ast_test_flag(&flags, OPTION_SRR)) {
h.srr = 1;
}
if (ast_test_flag(&flags, OPTION_DCS)) {
h.dcs = 1;
}
#if 0
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7': /* set the pid for saved local message */
h.pid = 0x40 + (*d & 0xF);
break;
}
#endif
if (sms_args.argc > 2) {
unsigned char *up;
/* submitting a message, not taking call. */
/* deprecated, use smsq instead */
h.scts = ast_tvnow();
if (ast_strlen_zero(sms_args.addr) || strlen(sms_args.addr) >= sizeof(h.oa)) {
ast_log(LOG_ERROR, "Address too long %s\n", sms_args.addr);
goto done;
}
if (h.smsc) {
ast_copy_string(h.oa, sms_args.addr, sizeof(h.oa));
} else {
ast_copy_string(h.da, sms_args.addr, sizeof(h.da));
ast_copy_string(h.oa, h.cli, sizeof(h.oa));
}
h.udl = 0;
if (ast_strlen_zero(sms_args.body)) {
ast_log(LOG_ERROR, "Missing body for %s\n", sms_args.addr);
goto done;
}
up = (unsigned char *)sms_args.body;
while (*up && h.udl < SMSLEN) {
h.ud[h.udl++] = utf8decode(&up);
}
if (is7bit(h.dcs) && packsms7(0, h.udhl, h.udh, h.udl, h.ud) < 0) {
ast_log(LOG_WARNING, "Invalid 7 bit GSM data\n");
goto done;
}
if (is8bit(h.dcs) && packsms8(0, h.udhl, h.udh, h.udl, h.ud) < 0) {
ast_log(LOG_WARNING, "Invalid 8 bit data\n");
goto done;
}
if (is16bit(h.dcs) && packsms16(0, h.udhl, h.udh, h.udl, h.ud) < 0) {
ast_log(LOG_WARNING, "Invalid 16 bit data\n");
goto done;
}
h.rx = 0; /* sent message */
h.mr = -1;
sms_writefile(&h);
res = h.err;
goto done;
}
if (chan->_state != AST_STATE_UP) { /* make sure channel is answered before any TX */
ast_answer(chan);
}
if (ast_test_flag(&flags, OPTION_ANSWER)) {
h.framenumber = 1; /* Proto 2 */
/* set up SMS_EST initial message */
if (h.protocol == 2) {
h.omsg[0] = DLL2_SMS_EST;
h.omsg[1] = 0;
} else {
h.omsg[0] = DLL1_SMS_EST | DLL1_SMS_COMPLETE;
h.omsg[1] = 0;
}
sms_messagetx(&h);
}
res = ast_set_write_format_by_id(chan, __OUT_FMT);
if (res >= 0) {
res = ast_set_read_format_by_id(chan, AST_FORMAT_SLINEAR);
}
if (res < 0) {
ast_log(LOG_ERROR, "Unable to set to linear mode, giving up\n");
goto done;
}
if ( (res = ast_activate_generator(chan, &smsgen, &h)) < 0) {
ast_log(LOG_ERROR, "Failed to activate generator on '%s'\n", chan->name);
goto done;
}
/* Do our thing here */
for (;;) {
struct ast_frame *f;
int i = ast_waitfor(chan, -1);
if (i < 0) {
ast_log(LOG_NOTICE, "waitfor failed\n");
break;
}
if (h.hangup) {
ast_log(LOG_NOTICE, "channel hangup\n");
break;
}
f = ast_read(chan);
if (!f) {
ast_log(LOG_NOTICE, "ast_read failed\n");
break;
}
if (f->frametype == AST_FRAME_VOICE) {
sms_process(&h, f->samples, f->data.ptr);
}
ast_frfree(f);
}
res = h.err; /* XXX */
/*
* The SMS generator data is on the stack. We _MUST_ make sure the generator
* is stopped before returning from this function.
*/
ast_deactivate_generator(chan);
sms_log(&h, '?'); /* log incomplete message */
done:
return (res);
}
static int unload_module(void)
{
return ast_unregister_application(app);
}
static int load_module(void)
{
#ifdef OUTALAW
int p;
for (p = 0; p < 80; p++) {
wavea[p] = AST_LIN2A(wave[p]);
}
#endif
snprintf(log_file, sizeof(log_file), "%s/sms", ast_config_AST_LOG_DIR);
return ast_register_application_xml(app, sms_exec);
}
AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "SMS/PSTN handler");
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