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asterisk/channels/misdn/ie.c

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v18.15.1
2023-05-25 18:45:57 +00:00
/*
* Chan_Misdn -- Channel Driver for Asterisk
*
* Interface to mISDN
*
* Copyright (C) 2005, Christian Richter
*
* Christian Richter <crich@beronet.com>
*
* heaviliy patched from jollys ie.cpp, jolly gave me ALL
* rights for this code, i can even have my own copyright on it.
*
* This program is free software, distributed under the terms of
* the GNU General Public License
*/
/*! \file
* \brief Interface to mISDN
* \author Christian Richter <crich@beronet.com>
*/
/*
the pointer of enc_ie_* always points to the IE itself
if qi is not NULL (TE-mode), offset is set
*/
/*** MODULEINFO
<support_level>extended</support_level>
***/
#include "asterisk.h"
#include <string.h>
#include <mISDNuser/mISDNlib.h>
#include <mISDNuser/isdn_net.h>
#include <mISDNuser/l3dss1.h>
#include <mISDNuser/net_l3.h>
#include "asterisk/localtime.h"
#define MISDN_IE_DEBG 0
/* support stuff */
static void strnncpy(char *dest, const char *src, size_t len, size_t dst_len)
{
if (len > dst_len-1)
len = dst_len-1;
strncpy(dest, src, len);
dest[len] = '\0';
}
/* IE_COMPLETE */
static void enc_ie_complete(unsigned char **ntmode, msg_t *msg, int complete, int nt, struct misdn_bchannel *bc)
{
unsigned char *p;
Q931_info_t *qi = (Q931_info_t *)(msg->data + mISDN_HEADER_LEN);
if (complete<0 || complete>1)
{
printf("%s: ERROR: complete(%d) is out of range.\n", __FUNCTION__, complete);
return;
}
if (complete)
if (MISDN_IE_DEBG) printf(" complete=%d\n", complete);
if (complete)
{
p = msg_put(msg, 1);
if (nt)
{
*ntmode = p;
} else
qi->QI_ELEMENT(sending_complete) = p - (unsigned char *)qi - sizeof(Q931_info_t);
p[0] = IE_COMPLETE;
}
}
static void dec_ie_complete(unsigned char *p, Q931_info_t *qi, int *complete, int nt, struct misdn_bchannel *bc)
{
*complete = 0;
if (!nt)
{
if (qi->QI_ELEMENT(sending_complete))
*complete = 1;
} else
if (p)
*complete = 1;
if (*complete)
if (MISDN_IE_DEBG) printf(" complete=%d\n", *complete);
}
/* IE_BEARER */
static void enc_ie_bearer(unsigned char **ntmode, msg_t *msg, int coding, int capability, int mode, int rate, int multi, int user, int nt, struct misdn_bchannel *bc)
{
unsigned char *p;
Q931_info_t *qi = (Q931_info_t *)(msg->data + mISDN_HEADER_LEN);
int l;
if (coding<0 || coding>3)
{
printf("%s: ERROR: coding(%d) is out of range.\n", __FUNCTION__, coding);
return;
}
if (capability<0 || capability>31)
{
printf("%s: ERROR: capability(%d) is out of range.\n", __FUNCTION__, capability);
return;
}
if (mode<0 || mode>3)
{
printf("%s: ERROR: mode(%d) is out of range.\n", __FUNCTION__, mode);
return;
}
if (rate<0 || rate>31)
{
printf("%s: ERROR: rate(%d) is out of range.\n", __FUNCTION__, rate);
return;
}
if (multi>127)
{
printf("%s: ERROR: multi(%d) is out of range.\n", __FUNCTION__, multi);
return;
}
if (user>31)
{
printf("%s: ERROR: user L1(%d) is out of range.\n", __FUNCTION__, rate);
return;
}
if (rate!=24 && multi>=0)
{
printf("%s: WARNING: multi(%d) is only possible if rate(%d) would be 24.\n", __FUNCTION__, multi, rate);
multi = -1;
}
if (MISDN_IE_DEBG) printf(" coding=%d capability=%d mode=%d rate=%d multi=%d user=%d\n", coding, capability, mode, rate, multi, user);
l = 2 + (multi>=0) + (user>=0);
p = msg_put(msg, l+2);
if (nt)
*ntmode = p+1;
else
qi->QI_ELEMENT(bearer_capability) = p - (unsigned char *)qi - sizeof(Q931_info_t);
p[0] = IE_BEARER;
p[1] = l;
p[2] = 0x80 + (coding<<5) + capability;
p[3] = 0x80 + (mode<<5) + rate;
if (multi >= 0)
p[4] = 0x80 + multi;
if (user >= 0)
p[4+(multi>=0)] = 0xa0 + user;
}
static void dec_ie_bearer(unsigned char *p, Q931_info_t *qi, int *coding, int *capability, int *mode, int *rate, int *multi, int *user,
int *async, int *urate, int *stopbits, int *dbits, int *parity, int nt, struct misdn_bchannel *bc)
{
int octet;
*coding = -1;
*capability = -1;
*mode = -1;
*rate = -1;
*multi = -1;
*user = -1;
*async = -1;
*urate = -1;
*stopbits = -1;
*dbits = -1;
*parity = -1;
if (!nt)
{
p = NULL;
#ifdef LLC_SUPPORT
if (qi->QI_ELEMENT(llc)) {
p = (unsigned char *)qi + sizeof(Q931_info_t) + qi->QI_ELEMENT(llc) + 1;
}
#endif
if (qi->QI_ELEMENT(bearer_capability))
p = (unsigned char *)qi + sizeof(Q931_info_t) + qi->QI_ELEMENT(bearer_capability) + 1;
}
if (!p)
return;
if (p[0] < 2)
{
printf("%s: ERROR: IE too short (%d).\n", __FUNCTION__, p[0]);
return;
}
*coding = (p[1]&0x60) >> 5;
*capability = p[1] & 0x1f;
octet = 2;
if (!(p[1] & 0x80))
octet++;
if (p[0] < octet)
goto done;
*mode = (p[octet]&0x60) >> 5;
*rate = p[octet] & 0x1f;
octet++;
if (p[0] < octet)
goto done;
if (*rate == 0x18) {
/* Rate multiplier only present if 64Kb/s base rate */
*multi = p[octet++] & 0x7f;
}
if (p[0] < octet)
goto done;
/* Start L1 info */
if ((p[octet] & 0x60) == 0x20) {
*user = p[octet] & 0x1f;
if (p[0] <= octet)
goto done;
if (p[octet++] & 0x80)
goto l2;
*async = !!(p[octet] & 0x40);
/* 0x20 is inband negotiation */
*urate = p[octet] & 0x1f;
if (p[0] <= octet)
goto done;
if (p[octet++] & 0x80)
goto l2;
/* Ignore next byte for now: Intermediate rate, NIC, flow control */
if (p[0] <= octet)
goto done;
if (p[octet++] & 0x80)
goto l2;
/* And the next one. Header, multiframe, mode, assignor/ee, negotiation */
if (p[0] <= octet)
goto done;
if (~p[octet++] & 0x80)
goto l2;
/* Wheee. V.110 speed information */
*stopbits = (p[octet] & 0x60) >> 5;
*dbits = (p[octet] & 0x18) >> 3;
*parity = p[octet] & 7;
octet++;
}
l2: /* Nobody seems to want the rest so we don't bother (yet) */
done:
if (MISDN_IE_DEBG) printf(" coding=%d capability=%d mode=%d rate=%d multi=%d user=%d async=%d urate=%d stopbits=%d dbits=%d parity=%d\n", *coding, *capability, *mode, *rate, *multi, *user, *async, *urate, *stopbits, *dbits, *parity);
}
/* IE_CALL_ID */
#if 0
static void enc_ie_call_id(unsigned char **ntmode, msg_t *msg, char *callid, int callid_len, int nt, struct misdn_bchannel *bc)
{
unsigned char *p;
Q931_info_t *qi = (Q931_info_t *)(msg->data + mISDN_HEADER_LEN);
int l;
char debug[25];
int i;
if (!callid || callid_len<=0)
{
return;
}
if (callid_len>8)
{
printf("%s: ERROR: callid_len(%d) is out of range.\n", __FUNCTION__, callid_len);
return;
}
i = 0;
while(i < callid_len)
{
if (MISDN_IE_DEBG) printf(debug+(i*3), " %02hhx", (unsigned char)callid[i]);
i++;
}
if (MISDN_IE_DEBG) printf(" callid%s\n", debug);
l = callid_len;
p = msg_put(msg, l+2);
if (nt)
*ntmode = p+1;
else
qi->QI_ELEMENT(call_id) = p - (unsigned char *)qi - sizeof(Q931_info_t);
p[0] = IE_CALL_ID;
p[1] = l;
memcpy(p+2, callid, callid_len);
}
#endif
#if 0
static void dec_ie_call_id(unsigned char *p, Q931_info_t *qi, char *callid, int *callid_len, int nt, struct misdn_bchannel *bc)
{
char debug[25];
int i;
*callid_len = -1;
if (!nt)
{
p = NULL;
if (qi->QI_ELEMENT(call_id))
p = (unsigned char *)qi + sizeof(Q931_info_t) + qi->QI_ELEMENT(call_id) + 1;
}
if (!p)
return;
if (p[0] > 8)
{
printf("%s: ERROR: IE too long (%d).\n", __FUNCTION__, p[0]);
return;
}
*callid_len = p[0];
memcpy(callid, p+1, *callid_len);
i = 0;
while(i < *callid_len)
{
if (MISDN_IE_DEBG) printf(debug+(i*3), " %02hhx", (unsigned char)callid[i]);
i++;
}
if (MISDN_IE_DEBG) printf(" callid%s\n", debug);
}
#endif
/* IE_CALLED_PN */
static void enc_ie_called_pn(unsigned char **ntmode, msg_t *msg, int type, int plan, char *number, int nt, struct misdn_bchannel *bc)
{
unsigned char *p;
Q931_info_t *qi = (Q931_info_t *)(msg->data + mISDN_HEADER_LEN);
int l;
if (type<0 || type>7)
{
printf("%s: ERROR: type(%d) is out of range.\n", __FUNCTION__, type);
return;
}
if (plan<0 || plan>15)
{
printf("%s: ERROR: plan(%d) is out of range.\n", __FUNCTION__, plan);
return;
}
if (!number[0])
{
printf("%s: ERROR: number is not given.\n", __FUNCTION__);
return;
}
if (MISDN_IE_DEBG) printf(" type=%d plan=%d number='%s'\n", type, plan, number);
l = 1+strlen((char *)number);
p = msg_put(msg, l+2);
if (nt)
*ntmode = p+1;
else
qi->QI_ELEMENT(called_nr) = p - (unsigned char *)qi - sizeof(Q931_info_t);
p[0] = IE_CALLED_PN;
p[1] = l;
p[2] = 0x80 + (type<<4) + plan;
strncpy((char *)p+3, (char *)number, strlen((char *)number));
}
static void dec_ie_called_pn(unsigned char *p, Q931_info_t *qi, int *type, int *plan, char *number, size_t number_len, int nt, struct misdn_bchannel *bc)
{
*type = -1;
*plan = -1;
*number = '\0';
if (!nt)
{
p = NULL;
if (qi->QI_ELEMENT(called_nr))
p = (unsigned char *)qi + sizeof(Q931_info_t) + qi->QI_ELEMENT(called_nr) + 1;
}
if (!p)
return;
if (p[0] < 2)
{
printf("%s: ERROR: IE too short (%d).\n", __FUNCTION__, p[0]);
return;
}
*type = (p[1]&0x70) >> 4;
*plan = p[1] & 0xf;
strnncpy(number, (char *)p+2, p[0]-1, number_len);
if (MISDN_IE_DEBG) printf(" type=%d plan=%d number='%s'\n", *type, *plan, number);
}
/* IE_CALLING_PN */
static void enc_ie_calling_pn(unsigned char **ntmode, msg_t *msg, int type, int plan, int present, int screen, char *number, int nt, struct misdn_bchannel *bc)
{
unsigned char *p;
Q931_info_t *qi = (Q931_info_t *)(msg->data + mISDN_HEADER_LEN);
int l;
if (type<0 || type>7)
{
printf("%s: ERROR: type(%d) is out of range.\n", __FUNCTION__, type);
return;
}
if (plan<0 || plan>15)
{
printf("%s: ERROR: plan(%d) is out of range.\n", __FUNCTION__, plan);
return;
}
if (present>3)
{
printf("%s: ERROR: present(%d) is out of range.\n", __FUNCTION__, present);
return;
}
if (present >= 0) if (screen<0 || screen>3)
{
printf("%s: ERROR: screen(%d) is out of range.\n", __FUNCTION__, screen);
return;
}
if (MISDN_IE_DEBG) printf(" type=%d plan=%d present=%d screen=%d number='%s'\n", type, plan, present, screen, number);
l = 1;
if (number) if (number[0])
l += strlen((char *)number);
if (present >= 0)
l += 1;
p = msg_put(msg, l+2);
if (nt)
*ntmode = p+1;
else
qi->QI_ELEMENT(calling_nr) = p - (unsigned char *)qi - sizeof(Q931_info_t);
p[0] = IE_CALLING_PN;
p[1] = l;
if (present >= 0)
{
p[2] = 0x00 + (type<<4) + plan;
p[3] = 0x80 + (present<<5) + screen;
if (number) if (number[0])
strncpy((char *)p+4, (char *)number, strlen((char *)number));
} else
{
p[2] = 0x80 + (type<<4) + plan;
if (number) if (number[0])
strncpy((char *)p+3, (char *)number, strlen((char *)number));
}
}
static void dec_ie_calling_pn(unsigned char *p, Q931_info_t *qi, int *type, int *plan, int *present, int *screen, char *number, size_t number_len, int nt, struct misdn_bchannel *bc)
{
*type = -1;
*plan = -1;
*present = -1;
*screen = -1;
*number = '\0';
if (!nt)
{
p = NULL;
if (qi->QI_ELEMENT(calling_nr))
p = (unsigned char *)qi + sizeof(Q931_info_t) + qi->QI_ELEMENT(calling_nr) + 1;
}
if (!p)
return;
if (p[0] < 1)
{
printf("%s: ERROR: IE too short (%d).\n", __FUNCTION__, p[0]);
return;
}
*type = (p[1]&0x70) >> 4;
*plan = p[1] & 0xf;
if (!(p[1] & 0x80))
{
if (p[0] < 2)
{
printf("%s: ERROR: IE too short (%d).\n", __FUNCTION__, p[0]);
return;
}
*present = (p[2]&0x60) >> 5;
*screen = p[2] & 0x3;
strnncpy(number, (char *)p+3, p[0]-2, number_len);
} else
{
strnncpy(number, (char *)p+2, p[0]-1, number_len);
/* SPECIAL workarround for IBT software bug */
/* if (number[0]==0x80) */
/* strcpy((char *)number, (char *)number+1); */
}
if (MISDN_IE_DEBG) printf(" type=%d plan=%d present=%d screen=%d number='%s'\n", *type, *plan, *present, *screen, number);
}
/* IE_CONNECTED_PN */
static void enc_ie_connected_pn(unsigned char **ntmode, msg_t *msg, int type, int plan, int present, int screen, char *number, int nt, struct misdn_bchannel *bc)
{
unsigned char *p;
Q931_info_t *qi = (Q931_info_t *)(msg->data + mISDN_HEADER_LEN);
int l;
if (type<0 || type>7)
{
printf("%s: ERROR: type(%d) is out of range.\n", __FUNCTION__, type);
return;
}
if (plan<0 || plan>15)
{
printf("%s: ERROR: plan(%d) is out of range.\n", __FUNCTION__, plan);
return;
}
if (present>3)
{
printf("%s: ERROR: present(%d) is out of range.\n", __FUNCTION__, present);
return;
}
if (present >= 0) if (screen<0 || screen>3)
{
printf("%s: ERROR: screen(%d) is out of range.\n", __FUNCTION__, screen);
return;
}
if (MISDN_IE_DEBG) printf(" type=%d plan=%d present=%d screen=%d number='%s'\n", type, plan, present, screen, number);
l = 1;
if (number) if (number[0])
l += strlen((char *)number);
if (present >= 0)
l += 1;
p = msg_put(msg, l+2);
if (nt)
*ntmode = p+1;
else
qi->QI_ELEMENT(connected_nr) = p - (unsigned char *)qi - sizeof(Q931_info_t);
p[0] = IE_CONNECT_PN;
p[1] = l;
if (present >= 0)
{
p[2] = 0x00 + (type<<4) + plan;
p[3] = 0x80 + (present<<5) + screen;
if (number) if (number[0])
strncpy((char *)p+4, (char *)number, strlen((char *)number));
} else
{
p[2] = 0x80 + (type<<4) + plan;
if (number) if (number[0])
strncpy((char *)p+3, (char *)number, strlen((char *)number));
}
}
static void dec_ie_connected_pn(unsigned char *p, Q931_info_t *qi, int *type, int *plan, int *present, int *screen, char *number, size_t number_len, int nt, struct misdn_bchannel *bc)
{
*type = -1;
*plan = -1;
*present = -1;
*screen = -1;
*number = '\0';
if (!nt)
{
p = NULL;
if (qi->QI_ELEMENT(connected_nr))
p = (unsigned char *)qi + sizeof(Q931_info_t) + qi->QI_ELEMENT(connected_nr) + 1;
}
if (!p)
return;
if (p[0] < 1)
{
printf("%s: ERROR: IE too short (%d).\n", __FUNCTION__, p[0]);
return;
}
*type = (p[1]&0x70) >> 4;
*plan = p[1] & 0xf;
if (!(p[1] & 0x80))
{
if (p[0] < 2)
{
printf("%s: ERROR: IE too short (%d).\n", __FUNCTION__, p[0]);
return;
}
*present = (p[2]&0x60) >> 5;
*screen = p[2] & 0x3;
strnncpy(number, (char *)p+3, p[0]-2, number_len);
} else
{
strnncpy(number, (char *)p+2, p[0]-1, number_len);
}
if (MISDN_IE_DEBG) printf(" type=%d plan=%d present=%d screen=%d number='%s'\n", *type, *plan, *present, *screen, number);
}
/* IE_CAUSE */
static void enc_ie_cause(unsigned char **ntmode, msg_t *msg, int location, int cause, int nt, struct misdn_bchannel *bc)
{
unsigned char *p;
Q931_info_t *qi = (Q931_info_t *)(msg->data + mISDN_HEADER_LEN);
int l;
if (location<0 || location>7)
{
printf("%s: ERROR: location(%d) is out of range.\n", __FUNCTION__, location);
return;
}
if (cause<0 || cause>127)
{
printf("%s: ERROR: cause(%d) is out of range.\n", __FUNCTION__, cause);
return;
}
if (MISDN_IE_DEBG) printf(" location=%d cause=%d\n", location, cause);
l = 2;
p = msg_put(msg, l+2);
if (nt)
*ntmode = p+1;
else
qi->QI_ELEMENT(cause) = p - (unsigned char *)qi - sizeof(Q931_info_t);
p[0] = IE_CAUSE;
p[1] = l;
p[2] = 0x80 + location;
p[3] = 0x80 + cause;
}
#if 0
static void enc_ie_cause_standalone(unsigned char **ntmode, msg_t *msg, int location, int cause, int nt, struct misdn_bchannel *bc)
{
unsigned char *p = msg_put(msg, 4);
Q931_info_t *qi = (Q931_info_t *)(msg->data + mISDN_HEADER_LEN);
if (ntmode)
*ntmode = p+1;
else
qi->QI_ELEMENT(cause) = p - (unsigned char *)qi - sizeof(Q931_info_t);
p[0] = IE_CAUSE;
p[1] = 2;
p[2] = 0x80 + location;
p[3] = 0x80 + cause;
}
#endif
static void dec_ie_cause(unsigned char *p, Q931_info_t *qi, int *location, int *cause, int nt, struct misdn_bchannel *bc)
{
*location = -1;
*cause = -1;
if (!nt)
{
p = NULL;
if (qi->QI_ELEMENT(cause))
p = (unsigned char *)qi + sizeof(Q931_info_t) + qi->QI_ELEMENT(cause) + 1;
}
if (!p)
return;
if (p[0] < 2)
{
printf("%s: ERROR: IE too short (%d).\n", __FUNCTION__, p[0]);
return;
}
*location = p[1] & 0x0f;
*cause = p[2] & 0x7f;
if (MISDN_IE_DEBG) printf(" location=%d cause=%d\n", *location, *cause);
}
/* IE_CHANNEL_ID */
static void enc_ie_channel_id(unsigned char **ntmode, msg_t *msg, int exclusive, int channel, int nt, struct misdn_bchannel *bc)
{
unsigned char *p;
Q931_info_t *qi = (Q931_info_t *)(msg->data + mISDN_HEADER_LEN);
int l;
struct misdn_stack *stack=get_stack_by_bc(bc);
int pri = stack->pri;
if (exclusive<0 || exclusive>1)
{
printf("%s: ERROR: exclusive(%d) is out of range.\n", __FUNCTION__, exclusive);
return;
}
if ((channel<0 || channel>0xff)
|| (!pri && (channel>2 && channel<0xff))
|| (pri && (channel>31 && channel<0xff))
|| (pri && channel==16))
{
printf("%s: ERROR: channel(%d) is out of range.\n", __FUNCTION__, channel);
return;
}
/* if (MISDN_IE_DEBG) printf(" exclusive=%d channel=%d\n", exclusive, channel); */
if (!pri)
{
/* BRI */
l = 1;
p = msg_put(msg, l+2);
if (nt)
*ntmode = p+1;
else
qi->QI_ELEMENT(channel_id) = p - (unsigned char *)qi - sizeof(Q931_info_t);
p[0] = IE_CHANNEL_ID;
p[1] = l;
if (channel == 0xff)
channel = 3;
p[2] = 0x80 + (exclusive<<3) + channel;
/* printf(" exclusive=%d channel=%d\n", exclusive, channel); */
} else
{
/* PRI */
if (channel == 0) /* no channel */
return; /* IE not present */
/* if (MISDN_IE_DEBG) printf("channel = %d\n", channel); */
if (channel == 0xff) /* any channel */
{
l = 1;
p = msg_put(msg, l+2);
if (nt)
*ntmode = p+1;
else
qi->QI_ELEMENT(channel_id) = p - (unsigned char *)qi - sizeof(Q931_info_t);
p[0] = IE_CHANNEL_ID;
p[1] = l;
p[2] = 0x80 + 0x20 + 0x03;
/* if (MISDN_IE_DEBG) printf("%02hhx\n", p[2]); */
return; /* end */
}
l = 3;
p = msg_put(msg, l+2);
if (nt)
*ntmode = p+1;
else
qi->QI_ELEMENT(channel_id) = p - (unsigned char *)qi - sizeof(Q931_info_t);
p[0] = IE_CHANNEL_ID;
p[1] = l;
p[2] = 0x80 + 0x20 + (exclusive<<3) + 0x01;
p[3] = 0x80 + 3; /* CCITT, Number, B-type */
p[4] = 0x80 + channel;
/* if (MISDN_IE_DEBG) printf("%02hhx %02hhx %02hhx\n", p[2], p[3], p[4]); */
}
}
static void dec_ie_channel_id(unsigned char *p, Q931_info_t *qi, int *exclusive, int *channel, int nt, struct misdn_bchannel *bc)
{
struct misdn_stack *stack=get_stack_by_bc(bc);
int pri =stack->pri;
*exclusive = -1;
*channel = -1;
if (!nt)
{
p = NULL;
if (qi->QI_ELEMENT(channel_id))
p = (unsigned char *)qi + sizeof(Q931_info_t) + qi->QI_ELEMENT(channel_id) + 1;
}
if (!p)
return;
if (p[0] < 1)
{
printf("%s: ERROR: IE too short (%d).\n", __FUNCTION__, p[0]);
return;
}
if (p[1] & 0x40)
{
printf("%s: ERROR: refering to channels of other interfaces is not supported.\n", __FUNCTION__);
return;
}
if (p[1] & 0x04)
{
printf("%s: ERROR: using d-channel is not supported.\n", __FUNCTION__);
return;
}
*exclusive = (p[1]&0x08) >> 3;
if (!pri)
{
/* BRI */
if (p[1] & 0x20)
{
printf("%s: ERROR: extended channel ID with non PRI interface.\n", __FUNCTION__);
return;
}
*channel = p[1] & 0x03;
if (*channel == 3)
*channel = 0xff;
} else
{
/* PRI */
if (p[0] < 1)
{
printf("%s: ERROR: IE too short for PRI (%d).\n", __FUNCTION__, p[0]);
return;
}
if (!(p[1] & 0x20))
{
printf("%s: ERROR: basic channel ID with PRI interface.\n", __FUNCTION__);
return;
}
if ((p[1]&0x03) == 0x00)
{
/* no channel */
*channel = 0;
return;
}
if ((p[1]&0x03) == 0x03)
{
/* any channel */
*channel = 0xff;
return;
}
if (p[0] < 3)
{
printf("%s: ERROR: IE too short for PRI with channel(%d).\n", __FUNCTION__, p[0]);
return;
}
if (p[2] & 0x10)
{
printf("%s: ERROR: channel map not supported.\n", __FUNCTION__);
return;
}
*channel = p[3] & 0x7f;
if ( (*channel<1) | (*channel==16) | (*channel>31))
{
printf("%s: ERROR: PRI interface channel out of range (%d).\n", __FUNCTION__, *channel);
return;
}
/* if (MISDN_IE_DEBG) printf("%02hhx %02hhx %02hhx\n", p[1], p[2], p[3]); */
}
if (MISDN_IE_DEBG) printf(" exclusive=%d channel=%d\n", *exclusive, *channel);
}
/* IE_DATE */
static void enc_ie_date(unsigned char **ntmode, msg_t *msg, time_t ti, int nt, struct misdn_bchannel *bc)
{
unsigned char *p;
Q931_info_t *qi = (Q931_info_t *)(msg->data + mISDN_HEADER_LEN);
int l;
struct timeval tv = { ti, 0 };
struct ast_tm tm;
ast_localtime(&tv, &tm, NULL);
if (MISDN_IE_DEBG) printf(" year=%d month=%d day=%d hour=%d minute=%d\n", tm.tm_year%100, tm.tm_mon+1, tm.tm_mday, tm.tm_hour, tm.tm_min);
l = 5;
p = msg_put(msg, l+2);
if (nt)
*ntmode = p+1;
else
qi->QI_ELEMENT(date) = p - (unsigned char *)qi - sizeof(Q931_info_t);
p[0] = IE_DATE;
p[1] = l;
p[2] = tm.tm_year % 100;
p[3] = tm.tm_mon + 1;
p[4] = tm.tm_mday;
p[5] = tm.tm_hour;
p[6] = tm.tm_min;
}
/* IE_DISPLAY */
static void enc_ie_display(unsigned char **ntmode, msg_t *msg, char *display, int nt, struct misdn_bchannel *bc)
{
unsigned char *p;
Q931_info_t *qi = (Q931_info_t *) (msg->data + mISDN_HEADER_LEN);
int l;
if (!display[0])
{
printf("%s: ERROR: display text not given.\n", __FUNCTION__);
return;
}
l = strlen(display);
if (80 < l)
{
l = 80;
printf("%s: WARNING: display text too long (max %d chars), cutting.\n", __FUNCTION__, l);
display[l] = '\0';
}
/* if (MISDN_IE_DEBG) printf(" display='%s' (len=%d)\n", display, l); */
p = msg_put(msg, l + 2);
if (nt)
*ntmode = p + 1;
else
qi->QI_ELEMENT(display) = p - (unsigned char *) qi - sizeof(Q931_info_t);
p[0] = IE_DISPLAY;
p[1] = l;
strncpy((char *) p + 2, display, l);
}
#if 0
static void dec_ie_display(unsigned char *p, Q931_info_t *qi, char *display, size_t display_len, int nt, struct misdn_bchannel *bc)
{
*display = '\0';
if (!nt)
{
p = NULL;
if (qi->QI_ELEMENT(display))
p = (unsigned char *)qi + sizeof(Q931_info_t) + qi->QI_ELEMENT(display) + 1;
}
if (!p)
return;
if (p[0] < 1)
{
printf("%s: ERROR: IE too short (%d).\n", __FUNCTION__, p[0]);
return;
}
strnncpy(display, (char *)p+1, p[0], display_len);
if (MISDN_IE_DEBG) printf(" display='%s'\n", display);
}
#endif
/* IE_KEYPAD */
#if 1
static void enc_ie_keypad(unsigned char **ntmode, msg_t *msg, char *keypad, int nt, struct misdn_bchannel *bc)
{
unsigned char *p;
Q931_info_t *qi = (Q931_info_t *)(msg->data + mISDN_HEADER_LEN);
int l;
if (!keypad[0])
{
printf("%s: ERROR: keypad info not given.\n", __FUNCTION__);
return;
}
if (MISDN_IE_DEBG) printf(" keypad='%s'\n", keypad);
l = strlen(keypad);
p = msg_put(msg, l+2);
if (nt)
*ntmode = p+1;
else
qi->QI_ELEMENT(keypad) = p - (unsigned char *)qi - sizeof(Q931_info_t);
p[0] = IE_KEYPAD;
p[1] = l;
strncpy((char *)p+2, keypad, strlen(keypad));
}
#endif
static void dec_ie_keypad(unsigned char *p, Q931_info_t *qi, char *keypad, size_t keypad_len, int nt, struct misdn_bchannel *bc)
{
*keypad = '\0';
if (!nt)
{
p = NULL;
if (qi->QI_ELEMENT(keypad))
p = (unsigned char *)qi + sizeof(Q931_info_t) + qi->QI_ELEMENT(keypad) + 1;
}
if (!p)
return;
if (p[0] < 1)
{
printf("%s: ERROR: IE too short (%d).\n", __FUNCTION__, p[0]);
return;
}
strnncpy(keypad, (char *)p+1, p[0], keypad_len);
if (MISDN_IE_DEBG) printf(" keypad='%s'\n", keypad);
}
/* IE_NOTIFY */
static void enc_ie_notify(unsigned char **ntmode, msg_t *msg, int notify, int nt, struct misdn_bchannel *bc)
{
unsigned char *p;
Q931_info_t *qi = (Q931_info_t *)(msg->data + mISDN_HEADER_LEN);
int l;
if (notify<0 || notify>0x7f)
{
printf("%s: ERROR: notify(%d) is out of range.\n", __FUNCTION__, notify);
return;
}
if (MISDN_IE_DEBG) printf(" notify=%d\n", notify);
l = 1;
p = msg_put(msg, l+2);
if (nt)
*ntmode = p+1;
else
qi->QI_ELEMENT(notify) = p - (unsigned char *)qi - sizeof(Q931_info_t);
p[0] = IE_NOTIFY;
p[1] = l;
p[2] = 0x80 + notify;
}
static void dec_ie_notify(unsigned char *p, Q931_info_t *qi, int *notify, int nt, struct misdn_bchannel *bc)
{
*notify = -1;
if (!nt)
{
p = NULL;
if (qi->QI_ELEMENT(notify))
p = (unsigned char *)qi + sizeof(Q931_info_t) + qi->QI_ELEMENT(notify) + 1;
}
if (!p)
return;
if (p[0] < 1)
{
printf("%s: ERROR: IE too short (%d).\n", __FUNCTION__, p[0]);
return;
}
*notify = p[1] & 0x7f;
if (MISDN_IE_DEBG) printf(" notify=%d\n", *notify);
}
/* IE_PROGRESS */
static void enc_ie_progress(unsigned char **ntmode, msg_t *msg, int coding, int location, int progress, int nt, struct misdn_bchannel *bc)
{
unsigned char *p;
Q931_info_t *qi = (Q931_info_t *)(msg->data + mISDN_HEADER_LEN);
int l;
if (coding<0 || coding>0x03)
{
printf("%s: ERROR: coding(%d) is out of range.\n", __FUNCTION__, coding);
return;
}
if (location<0 || location>0x0f)
{
printf("%s: ERROR: location(%d) is out of range.\n", __FUNCTION__, location);
return;
}
if (progress<0 || progress>0x7f)
{
printf("%s: ERROR: progress(%d) is out of range.\n", __FUNCTION__, progress);
return;
}
if (MISDN_IE_DEBG) printf(" coding=%d location=%d progress=%d\n", coding, location, progress);
l = 2;
p = msg_put(msg, l+2);
if (nt)
*ntmode = p+1;
else
qi->QI_ELEMENT(progress) = p - (unsigned char *)qi - sizeof(Q931_info_t);
p[0] = IE_PROGRESS;
p[1] = l;
p[2] = 0x80 + (coding<<5) + location;
p[3] = 0x80 + progress;
}
static void dec_ie_progress(unsigned char *p, Q931_info_t *qi, int *coding, int *location, int *progress, int nt, struct misdn_bchannel *bc)
{
*coding = -1;
*location = -1;
//*progress = -1;
*progress = 0;
if (!nt)
{
p = NULL;
if (qi->QI_ELEMENT(progress))
p = (unsigned char *)qi + sizeof(Q931_info_t) + qi->QI_ELEMENT(progress) + 1;
}
if (!p)
return;
if (p[0] < 1)
{
printf("%s: ERROR: IE too short (%d).\n", __FUNCTION__, p[0]);
return;
}
*coding = (p[1]&0x60) >> 5;
*location = p[1] & 0x0f;
*progress = p[2] & 0x7f;
if (MISDN_IE_DEBG) printf(" coding=%d location=%d progress=%d\n", *coding, *location, *progress);
}
/* IE_REDIR_NR (redirecting = during MT_SETUP) */
static void enc_ie_redir_nr(unsigned char **ntmode, msg_t *msg, int type, int plan, int present, int screen, int reason, char *number, int nt, struct misdn_bchannel *bc)
{
unsigned char *p;
Q931_info_t *qi = (Q931_info_t *)(msg->data + mISDN_HEADER_LEN);
int l;
if (type<0 || type>7)
{
printf("%s: ERROR: type(%d) is out of range.\n", __FUNCTION__, type);
return;
}
if (plan<0 || plan>15)
{
printf("%s: ERROR: plan(%d) is out of range.\n", __FUNCTION__, plan);
return;
}
if (present > 3)
{
printf("%s: ERROR: present(%d) is out of range.\n", __FUNCTION__, present);
return;
}
if (present >= 0) if (screen<0 || screen>3)
{
printf("%s: ERROR: screen(%d) is out of range.\n", __FUNCTION__, screen);
return;
}
if (reason > 0x0f)
{
printf("%s: ERROR: reason(%d) is out of range.\n", __FUNCTION__, reason);
return;
}
if (MISDN_IE_DEBG) printf(" type=%d plan=%d present=%d screen=%d readon=%d number='%s'\n", type, plan, present, screen, reason, number);
l = 1;
if (number)
l += strlen((char *)number);
if (present >= 0)
{
l += 1;
if (reason >= 0)
l += 1;
}
p = msg_put(msg, l+2);
if (nt)
*ntmode = p+1;
else
qi->QI_ELEMENT(redirect_nr) = p - (unsigned char *)qi - sizeof(Q931_info_t);
p[0] = IE_REDIR_NR;
p[1] = l;
if (present >= 0)
{
if (reason >= 0)
{
p[2] = 0x00 + (type<<4) + plan;
p[3] = 0x00 + (present<<5) + screen;
p[4] = 0x80 + reason;
if (number)
strncpy((char *)p+5, (char *)number, strlen((char *)number));
} else
{
p[2] = 0x00 + (type<<4) + plan;
p[3] = 0x80 + (present<<5) + screen;
if (number)
strncpy((char *)p+4, (char *)number, strlen((char *)number));
}
} else
{
p[2] = 0x80 + (type<<4) + plan;
if (number) if (number[0])
strncpy((char *)p+3, (char *)number, strlen((char *)number));
}
}
static void dec_ie_redir_nr(unsigned char *p, Q931_info_t *qi, int *type, int *plan, int *present, int *screen, int *reason, char *number, size_t number_len, int nt, struct misdn_bchannel *bc)
{
*type = -1;
*plan = -1;
*present = -1;
*screen = -1;
*reason = -1;
*number = '\0';
if (!nt)
{
p = NULL;
if (qi->QI_ELEMENT(redirect_nr))
p = (unsigned char *)qi + sizeof(Q931_info_t) + qi->QI_ELEMENT(redirect_nr) + 1;
}
if (!p)
return;
if (p[0] < 1)
{
printf("%s: ERROR: IE too short (%d).\n", __FUNCTION__, p[0]);
return;
}
*type = (p[1]&0x70) >> 4;
*plan = p[1] & 0xf;
if (!(p[1] & 0x80))
{
*present = (p[2]&0x60) >> 5;
*screen = p[2] & 0x3;
if (!(p[2] & 0x80))
{
*reason = p[3] & 0x0f;
strnncpy(number, (char *)p+4, p[0]-3, number_len);
} else
{
strnncpy(number, (char *)p+3, p[0]-2, number_len);
}
} else
{
strnncpy(number, (char *)p+2, p[0]-1, number_len);
}
if (MISDN_IE_DEBG) printf(" type=%d plan=%d present=%d screen=%d reason=%d number='%s'\n", *type, *plan, *present, *screen, *reason, number);
}
/* IE_REDIR_DN (redirection = during MT_NOTIFY) */
static void enc_ie_redir_dn(unsigned char **ntmode, msg_t *msg, int type, int plan, int present, char *number, int nt, struct misdn_bchannel *bc)
{
unsigned char *p;
Q931_info_t *qi = (Q931_info_t *)(msg->data + mISDN_HEADER_LEN);
int l;
if (type<0 || type>7)
{
printf("%s: ERROR: type(%d) is out of range.\n", __FUNCTION__, type);
return;
}
if (plan<0 || plan>15)
{
printf("%s: ERROR: plan(%d) is out of range.\n", __FUNCTION__, plan);
return;
}
if (present > 3)
{
printf("%s: ERROR: present(%d) is out of range.\n", __FUNCTION__, present);
return;
}
if (MISDN_IE_DEBG) printf(" type=%d plan=%d present=%d number='%s'\n", type, plan, present, number);
l = 1;
if (number)
l += strlen((char *)number);
if (present >= 0)
l += 1;
p = msg_put(msg, l+2);
if (nt)
*ntmode = p+1;
else {
qi->QI_ELEMENT(redirect_dn) = p - (unsigned char *)qi - sizeof(Q931_info_t);
}
p[0] = IE_REDIR_DN;
p[1] = l;
if (present >= 0)
{
p[2] = 0x00 + (type<<4) + plan;
p[3] = 0x80 + (present<<5);
if (number)
strncpy((char *)p+4, (char *)number, strlen((char *)number));
} else
{
p[2] = 0x80 + (type<<4) + plan;
if (number)
strncpy((char *)p+3, (char *)number, strlen((char *)number));
}
}
static void dec_ie_redir_dn(unsigned char *p, Q931_info_t *qi, int *type, int *plan, int *present, char *number, size_t number_len, int nt, struct misdn_bchannel *bc)
{
*type = -1;
*plan = -1;
*present = -1;
*number = '\0';
if (!nt)
{
p = NULL;
if (qi->QI_ELEMENT(redirect_dn))
p = (unsigned char *)qi + sizeof(Q931_info_t) + qi->QI_ELEMENT(redirect_dn) + 1;
}
if (!p)
return;
if (p[0] < 1)
{
printf("%s: ERROR: IE too short (%d).\n", __FUNCTION__, p[0]);
return;
}
*type = (p[1]&0x70) >> 4;
*plan = p[1] & 0xf;
if (!(p[1] & 0x80))
{
*present = (p[2]&0x60) >> 5;
strnncpy(number, (char *)p+3, p[0]-2, number_len);
} else
{
strnncpy(number, (char *)p+2, p[0]-1, number_len);
}
if (MISDN_IE_DEBG) printf(" type=%d plan=%d present=%d number='%s'\n", *type, *plan, *present, number);
}
/* IE_USERUSER */
#if 1
static void enc_ie_useruser(unsigned char **ntmode, msg_t *msg, int protocol, char *user, int user_len, int nt, struct misdn_bchannel *bc)
{
unsigned char *p;
Q931_info_t *qi = (Q931_info_t *)(msg->data + mISDN_HEADER_LEN);
int l;
if (protocol<0 || protocol>127)
{
printf("%s: ERROR: protocol(%d) is out of range.\n", __FUNCTION__, protocol);
return;
}
if (!user || user_len<=0)
{
return;
}
if (MISDN_IE_DEBG) {
size_t i;
char debug[768];
for (i = 0; i < user_len; ++i) {
sprintf(debug + (i * 3), " %02hhx", (unsigned char)user[i]);
}
debug[i * 3] = 0;
printf(" protocol=%d user-user%s\n", protocol, debug);
}
l = user_len+1;
p = msg_put(msg, l+3);
if (nt)
*ntmode = p+1;
else
qi->QI_ELEMENT(useruser) = p - (unsigned char *)qi - sizeof(Q931_info_t);
p[0] = IE_USER_USER;
p[1] = l;
p[2] = protocol;
memcpy(p+3, user, user_len);
}
#endif
#if 1
static void dec_ie_useruser(unsigned char *p, Q931_info_t *qi, int *protocol, char *user, int *user_len, int nt, struct misdn_bchannel *bc)
{
*user_len = 0;
*protocol = -1;
if (!nt)
{
p = NULL;
if (qi->QI_ELEMENT(useruser))
p = (unsigned char *)qi + sizeof(Q931_info_t) + qi->QI_ELEMENT(useruser) + 1;
}
if (!p)
return;
*user_len = p[0]-1;
if (p[0] < 1)
return;
*protocol = p[1];
memcpy(user, p+2, (*user_len<=128)?*(user_len):128); /* clip to 128 maximum */
if (MISDN_IE_DEBG) {
int i;
char debug[768];
for (i = 0; i < *user_len; ++i) {
sprintf(debug + (i * 3), " %02hhx", (unsigned char)user[i]);
}
debug[i * 3] = 0;
printf(" protocol=%d user-user%s\n", *protocol, debug);
}
}
#endif
/* IE_DISPLAY */
static void enc_ie_restart_ind(unsigned char **ntmode, msg_t *msg, unsigned char rind, int nt, struct misdn_bchannel *bc)
{
unsigned char *p;
Q931_info_t *qi = (Q931_info_t *)(msg->data + mISDN_HEADER_LEN);
/* if (MISDN_IE_DEBG) printf(" display='%s' (len=%d)\n", display, strlen((char *)display)); */
p = msg_put(msg, 3);
if (nt)
*ntmode = p+1;
else
qi->QI_ELEMENT(restart_ind) = p - (unsigned char *)qi - sizeof(Q931_info_t);
p[0] = IE_RESTART_IND;
p[1] = 1;
p[2] = rind;
}