korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-11-18 17:54:13 +08:00
Code Issues Packages Projects Releases Wiki Activity
4d2ee1e688
linux/drivers/isdn/hisax/l3ni1.c
Rickard Strandqvist 85b722d760 isdn: hisax: l3ni1.c: Fix for possible null pointer dereference 
There is otherwise a risk of a possible null pointer dereference.

Was largely found by using a static code analysis program called cppcheck.

Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se>
2014-07-08 16:06:21 -07:00

3183 lines
75 KiB
C
Raw Blame History

/* $Id: l3ni1.c,v 2.8.2.3 2004/01/13 14:31:25 keil Exp $
*
* NI1 D-channel protocol
*
* Author Matt Henderson & Guy Ellis
* Copyright by Traverse Technologies Pty Ltd, www.travers.com.au
*
* This software may be used and distributed according to the terms
* of the GNU General Public License, incorporated herein by reference.
*
* 2000.6.6 Initial implementation of routines for US NI1
* Layer 3 protocol based on the EURO/DSS1 D-channel protocol
* driver written by Karsten Keil et al.
* NI-1 Hall of Fame - Thanks to....
* Ragnar Paulson - for some handy code fragments
* Will Scales - beta tester extraordinaire
* Brett Whittacre - beta tester and remote devel system in Vegas
*
*/
#include "hisax.h"
#include "isdnl3.h"
#include "l3ni1.h"
#include <linux/ctype.h>
#include <linux/slab.h>
extern char *HiSax_getrev(const char *revision);
static const char *ni1_revision = "$Revision: 2.8.2.3 $";
#define EXT_BEARER_CAPS 1
#define MsgHead(ptr, cref, mty) \
*ptr++ = 0x8; \
if (cref == -1) { \
*ptr++ = 0x0; \
} else { \
*ptr++ = 0x1; \
*ptr++ = cref^0x80; \
} \
*ptr++ = mty
/**********************************************/
/* get a new invoke id for remote operations. */
/* Only a return value != 0 is valid */
/**********************************************/
static unsigned char new_invoke_id(struct PStack *p)
{
unsigned char retval;
int i;
i = 32; /* maximum search depth */
retval = p->prot.ni1.last_invoke_id + 1; /* try new id */
while ((i) && (p->prot.ni1.invoke_used[retval >> 3] == 0xFF)) {
p->prot.ni1.last_invoke_id = (retval & 0xF8) + 8;
i--;
}
if (i) {
while (p->prot.ni1.invoke_used[retval >> 3] & (1 << (retval & 7)))
retval++;
} else
retval = 0;
p->prot.ni1.last_invoke_id = retval;
p->prot.ni1.invoke_used[retval >> 3] |= (1 << (retval & 7));
return (retval);
} /* new_invoke_id */
/*************************/
/* free a used invoke id */
/*************************/
static void free_invoke_id(struct PStack *p, unsigned char id)
{
if (!id) return; /* 0 = invalid value */
p->prot.ni1.invoke_used[id >> 3] &= ~(1 << (id & 7));
} /* free_invoke_id */
/**********************************************************/
/* create a new l3 process and fill in ni1 specific data */
/**********************************************************/
static struct l3_process
*ni1_new_l3_process(struct PStack *st, int cr)
{ struct l3_process *proc;
if (!(proc = new_l3_process(st, cr)))
return (NULL);
proc->prot.ni1.invoke_id = 0;
proc->prot.ni1.remote_operation = 0;
proc->prot.ni1.uus1_data[0] = '\0';
return (proc);
} /* ni1_new_l3_process */
/************************************************/
/* free a l3 process and all ni1 specific data */
/************************************************/
static void
ni1_release_l3_process(struct l3_process *p)
{
free_invoke_id(p->st, p->prot.ni1.invoke_id);
release_l3_process(p);
} /* ni1_release_l3_process */
/********************************************************/
/* search a process with invoke id id and dummy callref */
/********************************************************/
static struct l3_process *
l3ni1_search_dummy_proc(struct PStack *st, int id)
{ struct l3_process *pc = st->l3.proc; /* start of processes */
if (!id) return (NULL);
while (pc)
{ if ((pc->callref == -1) && (pc->prot.ni1.invoke_id == id))
return (pc);
pc = pc->next;
}
return (NULL);
} /* l3ni1_search_dummy_proc */
/*******************************************************************/
/* called when a facility message with a dummy callref is received */
/* and a return result is delivered. id specifies the invoke id. */
/*******************************************************************/
static void
l3ni1_dummy_return_result(struct PStack *st, int id, u_char *p, u_char nlen)
{ isdn_ctrl ic;
struct IsdnCardState *cs;
struct l3_process *pc = NULL;
if ((pc = l3ni1_search_dummy_proc(st, id)))
{ L3DelTimer(&pc->timer); /* remove timer */
cs = pc->st->l1.hardware;
ic.driver = cs->myid;
ic.command = ISDN_STAT_PROT;
ic.arg = NI1_STAT_INVOKE_RES;
ic.parm.ni1_io.hl_id = pc->prot.ni1.invoke_id;
ic.parm.ni1_io.ll_id = pc->prot.ni1.ll_id;
ic.parm.ni1_io.proc = pc->prot.ni1.proc;
ic.parm.ni1_io.timeout = 0;
ic.parm.ni1_io.datalen = nlen;
ic.parm.ni1_io.data = p;
free_invoke_id(pc->st, pc->prot.ni1.invoke_id);
pc->prot.ni1.invoke_id = 0; /* reset id */
cs->iif.statcallb(&ic);
ni1_release_l3_process(pc);
}
else
l3_debug(st, "dummy return result id=0x%x result len=%d", id, nlen);
} /* l3ni1_dummy_return_result */
/*******************************************************************/
/* called when a facility message with a dummy callref is received */
/* and a return error is delivered. id specifies the invoke id. */
/*******************************************************************/
static void
l3ni1_dummy_error_return(struct PStack *st, int id, ulong error)
{ isdn_ctrl ic;
struct IsdnCardState *cs;
struct l3_process *pc = NULL;
if ((pc = l3ni1_search_dummy_proc(st, id)))
{ L3DelTimer(&pc->timer); /* remove timer */
cs = pc->st->l1.hardware;
ic.driver = cs->myid;
ic.command = ISDN_STAT_PROT;
ic.arg = NI1_STAT_INVOKE_ERR;
ic.parm.ni1_io.hl_id = pc->prot.ni1.invoke_id;
ic.parm.ni1_io.ll_id = pc->prot.ni1.ll_id;
ic.parm.ni1_io.proc = pc->prot.ni1.proc;
ic.parm.ni1_io.timeout = error;
ic.parm.ni1_io.datalen = 0;
ic.parm.ni1_io.data = NULL;
free_invoke_id(pc->st, pc->prot.ni1.invoke_id);
pc->prot.ni1.invoke_id = 0; /* reset id */
cs->iif.statcallb(&ic);
ni1_release_l3_process(pc);
}
else
l3_debug(st, "dummy return error id=0x%x error=0x%lx", id, error);
} /* l3ni1_error_return */
/*******************************************************************/
/* called when a facility message with a dummy callref is received */
/* and a invoke is delivered. id specifies the invoke id. */
/*******************************************************************/
static void
l3ni1_dummy_invoke(struct PStack *st, int cr, int id,
int ident, u_char *p, u_char nlen)
{ isdn_ctrl ic;
struct IsdnCardState *cs;
l3_debug(st, "dummy invoke %s id=0x%x ident=0x%x datalen=%d",
(cr == -1) ? "local" : "broadcast", id, ident, nlen);
if (cr >= -1) return; /* ignore local data */
cs = st->l1.hardware;
ic.driver = cs->myid;
ic.command = ISDN_STAT_PROT;
ic.arg = NI1_STAT_INVOKE_BRD;
ic.parm.ni1_io.hl_id = id;
ic.parm.ni1_io.ll_id = 0;
ic.parm.ni1_io.proc = ident;
ic.parm.ni1_io.timeout = 0;
ic.parm.ni1_io.datalen = nlen;
ic.parm.ni1_io.data = p;
cs->iif.statcallb(&ic);
} /* l3ni1_dummy_invoke */
static void
l3ni1_parse_facility(struct PStack *st, struct l3_process *pc,
int cr, u_char *p)
{
int qd_len = 0;
unsigned char nlen = 0, ilen, cp_tag;
int ident, id;
ulong err_ret;
if (pc)
st = pc->st; /* valid Stack */
else
if ((!st) || (cr >= 0)) return; /* neither pc nor st specified */
p++;
qd_len = *p++;
if (qd_len == 0) {
l3_debug(st, "qd_len == 0");
return;
}
if ((*p & 0x1F) != 0x11) { /* Service discriminator, supplementary service */
l3_debug(st, "supplementary service != 0x11");
return;
}
while (qd_len > 0 && !(*p & 0x80)) { /* extension ? */
p++;
qd_len--;
}
if (qd_len < 2) {
l3_debug(st, "qd_len < 2");
return;
}
p++;
qd_len--;
if ((*p & 0xE0) != 0xA0) { /* class and form */
l3_debug(st, "class and form != 0xA0");
return;
}
cp_tag = *p & 0x1F; /* remember tag value */
p++;
qd_len--;
if (qd_len < 1)
{ l3_debug(st, "qd_len < 1");
return;
}
if (*p & 0x80)
{ /* length format indefinite or limited */
nlen = *p++ & 0x7F; /* number of len bytes or indefinite */
if ((qd_len-- < ((!nlen) ? 3 : (1 + nlen))) ||
(nlen > 1))
{ l3_debug(st, "length format error or not implemented");
return;
}
if (nlen == 1)
{ nlen = *p++; /* complete length */
qd_len--;
}
else
{ qd_len -= 2; /* trailing null bytes */
if ((*(p + qd_len)) || (*(p + qd_len + 1)))
{ l3_debug(st, "length format indefinite error");
return;
}
nlen = qd_len;
}
}
else
{ nlen = *p++;
qd_len--;
}
if (qd_len < nlen)
{ l3_debug(st, "qd_len < nlen");
return;
}
qd_len -= nlen;
if (nlen < 2)
{ l3_debug(st, "nlen < 2");
return;
}
if (*p != 0x02)
{ /* invoke identifier tag */
l3_debug(st, "invoke identifier tag !=0x02");
return;
}
p++;
nlen--;
if (*p & 0x80)
{ /* length format */
l3_debug(st, "invoke id length format 2");
return;
}
ilen = *p++;
nlen--;
if (ilen > nlen || ilen == 0)
{ l3_debug(st, "ilen > nlen || ilen == 0");
return;
}
nlen -= ilen;
id = 0;
while (ilen > 0)
{ id = (id << 8) | (*p++ & 0xFF); /* invoke identifier */
ilen--;
}
switch (cp_tag) { /* component tag */
case 1: /* invoke */
if (nlen < 2) {
l3_debug(st, "nlen < 2 22");
return;
}
if (*p != 0x02) { /* operation value */
l3_debug(st, "operation value !=0x02");
return;
}
p++;
nlen--;
ilen = *p++;
nlen--;
if (ilen > nlen || ilen == 0) {
l3_debug(st, "ilen > nlen || ilen == 0 22");
return;
}
nlen -= ilen;
ident = 0;
while (ilen > 0) {
ident = (ident << 8) | (*p++ & 0xFF);
ilen--;
}
if (!pc)
{
l3ni1_dummy_invoke(st, cr, id, ident, p, nlen);
return;
}
l3_debug(st, "invoke break");
break;
case 2: /* return result */
/* if no process available handle separately */
if (!pc)
{ if (cr == -1)
l3ni1_dummy_return_result(st, id, p, nlen);
return;
}
if ((pc->prot.ni1.invoke_id) && (pc->prot.ni1.invoke_id == id))
{ /* Diversion successful */
free_invoke_id(st, pc->prot.ni1.invoke_id);
pc->prot.ni1.remote_result = 0; /* success */
pc->prot.ni1.invoke_id = 0;
pc->redir_result = pc->prot.ni1.remote_result;
st->l3.l3l4(st, CC_REDIR | INDICATION, pc); } /* Diversion successful */
else
l3_debug(st, "return error unknown identifier");
break;
case 3: /* return error */
err_ret = 0;
if (nlen < 2)
{ l3_debug(st, "return error nlen < 2");
return;
}
if (*p != 0x02)
{ /* result tag */
l3_debug(st, "invoke error tag !=0x02");
return;
}
p++;
nlen--;
if (*p > 4)
{ /* length format */
l3_debug(st, "invoke return errlen > 4 ");
return;
}
ilen = *p++;
nlen--;
if (ilen > nlen || ilen == 0)
{ l3_debug(st, "error return ilen > nlen || ilen == 0");
return;
}
nlen -= ilen;
while (ilen > 0)
{ err_ret = (err_ret << 8) | (*p++ & 0xFF); /* error value */
ilen--;
}
/* if no process available handle separately */
if (!pc)
{ if (cr == -1)
l3ni1_dummy_error_return(st, id, err_ret);
return;
}
if ((pc->prot.ni1.invoke_id) && (pc->prot.ni1.invoke_id == id))
{ /* Deflection error */
free_invoke_id(st, pc->prot.ni1.invoke_id);
pc->prot.ni1.remote_result = err_ret; /* result */
pc->prot.ni1.invoke_id = 0;
pc->redir_result = pc->prot.ni1.remote_result;
st->l3.l3l4(st, CC_REDIR | INDICATION, pc);
} /* Deflection error */
else
l3_debug(st, "return result unknown identifier");
break;
default:
l3_debug(st, "facility default break tag=0x%02x", cp_tag);
break;
}
}
static void
l3ni1_message(struct l3_process *pc, u_char mt)
{
struct sk_buff *skb;
u_char *p;
if (!(skb = l3_alloc_skb(4)))
return;
p = skb_put(skb, 4);
MsgHead(p, pc->callref, mt);
l3_msg(pc->st, DL_DATA | REQUEST, skb);
}
static void
l3ni1_message_plus_chid(struct l3_process *pc, u_char mt)
/* sends an l3 messages plus channel id - added GE 05/09/00 */
{
struct sk_buff *skb;
u_char tmp[16];
u_char *p = tmp;
u_char chid;
chid = (u_char)(pc->para.bchannel & 0x03) | 0x88;
MsgHead(p, pc->callref, mt);
*p++ = IE_CHANNEL_ID;
*p++ = 0x01;
*p++ = chid;
if (!(skb = l3_alloc_skb(7)))
return;
memcpy(skb_put(skb, 7), tmp, 7);
l3_msg(pc->st, DL_DATA | REQUEST, skb);
}
static void
l3ni1_message_cause(struct l3_process *pc, u_char mt, u_char cause)
{
struct sk_buff *skb;
u_char tmp[16];
u_char *p = tmp;
int l;
MsgHead(p, pc->callref, mt);
*p++ = IE_CAUSE;
*p++ = 0x2;
*p++ = 0x80;
*p++ = cause | 0x80;
l = p - tmp;
if (!(skb = l3_alloc_skb(l)))
return;
memcpy(skb_put(skb, l), tmp, l);
l3_msg(pc->st, DL_DATA | REQUEST, skb);
}
static void
l3ni1_status_send(struct l3_process *pc, u_char pr, void *arg)
{
u_char tmp[16];
u_char *p = tmp;
int l;
struct sk_buff *skb;
MsgHead(p, pc->callref, MT_STATUS);
*p++ = IE_CAUSE;
*p++ = 0x2;
*p++ = 0x80;
*p++ = pc->para.cause | 0x80;
*p++ = IE_CALL_STATE;
*p++ = 0x1;
*p++ = pc->state & 0x3f;
l = p - tmp;
if (!(skb = l3_alloc_skb(l)))
return;
memcpy(skb_put(skb, l), tmp, l);
l3_msg(pc->st, DL_DATA | REQUEST, skb);
}
static void
l3ni1_msg_without_setup(struct l3_process *pc, u_char pr, void *arg)
{
/* This routine is called if here was no SETUP made (checks in ni1up and in
* l3ni1_setup) and a RELEASE_COMPLETE have to be sent with an error code
* MT_STATUS_ENQUIRE in the NULL state is handled too
*/
u_char tmp[16];
u_char *p = tmp;
int l;
struct sk_buff *skb;
switch (pc->para.cause) {
case 81: /* invalid callreference */
case 88: /* incomp destination */
case 96: /* mandory IE missing */
case 100: /* invalid IE contents */
case 101: /* incompatible Callstate */
MsgHead(p, pc->callref, MT_RELEASE_COMPLETE);
*p++ = IE_CAUSE;
*p++ = 0x2;
*p++ = 0x80;
*p++ = pc->para.cause | 0x80;
break;
default:
printk(KERN_ERR "HiSax l3ni1_msg_without_setup wrong cause %d\n",
pc->para.cause);
return;
}
l = p - tmp;
if (!(skb = l3_alloc_skb(l)))
return;
memcpy(skb_put(skb, l), tmp, l);
l3_msg(pc->st, DL_DATA | REQUEST, skb);
ni1_release_l3_process(pc);
}
static int ie_ALERTING[] = {IE_BEARER, IE_CHANNEL_ID | IE_MANDATORY_1,
IE_FACILITY, IE_PROGRESS, IE_DISPLAY, IE_SIGNAL, IE_HLC,
IE_USER_USER, -1};
static int ie_CALL_PROCEEDING[] = {IE_BEARER, IE_CHANNEL_ID | IE_MANDATORY_1,
IE_FACILITY, IE_PROGRESS, IE_DISPLAY, IE_HLC, -1};
static int ie_CONNECT[] = {IE_BEARER, IE_CHANNEL_ID | IE_MANDATORY_1,
IE_FACILITY, IE_PROGRESS, IE_DISPLAY, IE_DATE, IE_SIGNAL,
IE_CONNECT_PN, IE_CONNECT_SUB, IE_LLC, IE_HLC, IE_USER_USER, -1};
static int ie_CONNECT_ACKNOWLEDGE[] = {IE_CHANNEL_ID, IE_DISPLAY, IE_SIGNAL, -1};
static int ie_DISCONNECT[] = {IE_CAUSE | IE_MANDATORY, IE_FACILITY,
IE_PROGRESS, IE_DISPLAY, IE_SIGNAL, IE_USER_USER, -1};
static int ie_INFORMATION[] = {IE_COMPLETE, IE_DISPLAY, IE_KEYPAD, IE_SIGNAL,
IE_CALLED_PN, -1};
static int ie_NOTIFY[] = {IE_BEARER, IE_NOTIFY | IE_MANDATORY, IE_DISPLAY, -1};
static int ie_PROGRESS[] = {IE_BEARER, IE_CAUSE, IE_FACILITY, IE_PROGRESS |
IE_MANDATORY, IE_DISPLAY, IE_HLC, IE_USER_USER, -1};
static int ie_RELEASE[] = {IE_CAUSE | IE_MANDATORY_1, IE_FACILITY, IE_DISPLAY,
IE_SIGNAL, IE_USER_USER, -1};
/* a RELEASE_COMPLETE with errors don't require special actions
static int ie_RELEASE_COMPLETE[] = {IE_CAUSE | IE_MANDATORY_1, IE_DISPLAY, IE_SIGNAL, IE_USER_USER, -1};
*/
static int ie_RESUME_ACKNOWLEDGE[] = {IE_CHANNEL_ID | IE_MANDATORY, IE_FACILITY,
IE_DISPLAY, -1};
static int ie_RESUME_REJECT[] = {IE_CAUSE | IE_MANDATORY, IE_DISPLAY, -1};
static int ie_SETUP[] = {IE_COMPLETE, IE_BEARER | IE_MANDATORY,
IE_CHANNEL_ID | IE_MANDATORY, IE_FACILITY, IE_PROGRESS,
IE_NET_FAC, IE_DISPLAY, IE_KEYPAD, IE_SIGNAL, IE_CALLING_PN,
IE_CALLING_SUB, IE_CALLED_PN, IE_CALLED_SUB, IE_REDIR_NR,
IE_LLC, IE_HLC, IE_USER_USER, -1};
static int ie_SETUP_ACKNOWLEDGE[] = {IE_CHANNEL_ID | IE_MANDATORY, IE_FACILITY,
IE_PROGRESS, IE_DISPLAY, IE_SIGNAL, -1};
static int ie_STATUS[] = {IE_CAUSE | IE_MANDATORY, IE_CALL_STATE |
IE_MANDATORY, IE_DISPLAY, -1};
static int ie_STATUS_ENQUIRY[] = {IE_DISPLAY, -1};
static int ie_SUSPEND_ACKNOWLEDGE[] = {IE_DISPLAY, IE_FACILITY, -1};
static int ie_SUSPEND_REJECT[] = {IE_CAUSE | IE_MANDATORY, IE_DISPLAY, -1};
/* not used
* static int ie_CONGESTION_CONTROL[] = {IE_CONGESTION | IE_MANDATORY,
* IE_CAUSE | IE_MANDATORY, IE_DISPLAY, -1};
* static int ie_USER_INFORMATION[] = {IE_MORE_DATA, IE_USER_USER | IE_MANDATORY, -1};
* static int ie_RESTART[] = {IE_CHANNEL_ID, IE_DISPLAY, IE_RESTART_IND |
* IE_MANDATORY, -1};
*/
static int ie_FACILITY[] = {IE_FACILITY | IE_MANDATORY, IE_DISPLAY, -1};
static int comp_required[] = {1, 2, 3, 5, 6, 7, 9, 10, 11, 14, 15, -1};
static int l3_valid_states[] = {0, 1, 2, 3, 4, 6, 7, 8, 9, 10, 11, 12, 15, 17, 19, 25, -1};
struct ie_len {
int ie;
int len;
};
static
struct ie_len max_ie_len[] = {
{IE_SEGMENT, 4},
{IE_BEARER, 12},
{IE_CAUSE, 32},
{IE_CALL_ID, 10},
{IE_CALL_STATE, 3},
{IE_CHANNEL_ID, 34},
{IE_FACILITY, 255},
{IE_PROGRESS, 4},
{IE_NET_FAC, 255},
{IE_NOTIFY, 3},
{IE_DISPLAY, 82},
{IE_DATE, 8},
{IE_KEYPAD, 34},
{IE_SIGNAL, 3},
{IE_INFORATE, 6},
{IE_E2E_TDELAY, 11},
{IE_TDELAY_SEL, 5},
{IE_PACK_BINPARA, 3},
{IE_PACK_WINSIZE, 4},
{IE_PACK_SIZE, 4},
{IE_CUG, 7},
{IE_REV_CHARGE, 3},
{IE_CALLING_PN, 24},
{IE_CALLING_SUB, 23},
{IE_CALLED_PN, 24},
{IE_CALLED_SUB, 23},
{IE_REDIR_NR, 255},
{IE_TRANS_SEL, 255},
{IE_RESTART_IND, 3},
{IE_LLC, 18},
{IE_HLC, 5},
{IE_USER_USER, 131},
{-1, 0},
};
static int
getmax_ie_len(u_char ie) {
int i = 0;
while (max_ie_len[i].ie != -1) {
if (max_ie_len[i].ie == ie)
return (max_ie_len[i].len);
i++;
}
return (255);
}
static int
ie_in_set(struct l3_process *pc, u_char ie, int *checklist) {
int ret = 1;
while (*checklist != -1) {
if ((*checklist & 0xff) == ie) {
if (ie & 0x80)
return (-ret);
else
return (ret);
}
ret++;
checklist++;
}
return (0);
}
static int
check_infoelements(struct l3_process *pc, struct sk_buff *skb, int *checklist)
{
int *cl = checklist;
u_char mt;
u_char *p, ie;
int l, newpos, oldpos;
int err_seq = 0, err_len = 0, err_compr = 0, err_ureg = 0;
u_char codeset = 0;
u_char old_codeset = 0;
u_char codelock = 1;
p = skb->data;
/* skip cr */
p++;
l = (*p++) & 0xf;
p += l;
mt = *p++;
oldpos = 0;
while ((p - skb->data) < skb->len) {
if ((*p & 0xf0) == 0x90) { /* shift codeset */
old_codeset = codeset;
codeset = *p & 7;
if (*p & 0x08)
codelock = 0;
else
codelock = 1;
if (pc->debug & L3_DEB_CHECK)
l3_debug(pc->st, "check IE shift%scodeset %d->%d",
codelock ? " locking " : " ", old_codeset, codeset);
p++;
continue;
}
if (!codeset) { /* only codeset 0 */
if ((newpos = ie_in_set(pc, *p, cl))) {
if (newpos > 0) {
if (newpos < oldpos)
err_seq++;
else
oldpos = newpos;
}
} else {
if (ie_in_set(pc, *p, comp_required))
err_compr++;
else
err_ureg++;
}
}
ie = *p++;
if (ie & 0x80) {
l = 1;
} else {
l = *p++;
p += l;
l += 2;
}
if (!codeset && (l > getmax_ie_len(ie)))
err_len++;
if (!codelock) {
if (pc->debug & L3_DEB_CHECK)
l3_debug(pc->st, "check IE shift back codeset %d->%d",
codeset, old_codeset);
codeset = old_codeset;
codelock = 1;
}
}
if (err_compr | err_ureg | err_len | err_seq) {
if (pc->debug & L3_DEB_CHECK)
l3_debug(pc->st, "check IE MT(%x) %d/%d/%d/%d",
mt, err_compr, err_ureg, err_len, err_seq);
if (err_compr)
return (ERR_IE_COMPREHENSION);
if (err_ureg)
return (ERR_IE_UNRECOGNIZED);
if (err_len)
return (ERR_IE_LENGTH);
if (err_seq)
return (ERR_IE_SEQUENCE);
}
return (0);
}
/* verify if a message type exists and contain no IE error */
static int
l3ni1_check_messagetype_validity(struct l3_process *pc, int mt, void *arg)
{
switch (mt) {
case MT_ALERTING:
case MT_CALL_PROCEEDING:
case MT_CONNECT:
case MT_CONNECT_ACKNOWLEDGE:
case MT_DISCONNECT:
case MT_INFORMATION:
case MT_FACILITY:
case MT_NOTIFY:
case MT_PROGRESS:
case MT_RELEASE:
case MT_RELEASE_COMPLETE:
case MT_SETUP:
case MT_SETUP_ACKNOWLEDGE:
case MT_RESUME_ACKNOWLEDGE:
case MT_RESUME_REJECT:
case MT_SUSPEND_ACKNOWLEDGE:
case MT_SUSPEND_REJECT:
case MT_USER_INFORMATION:
case MT_RESTART:
case MT_RESTART_ACKNOWLEDGE:
case MT_CONGESTION_CONTROL:
case MT_STATUS:
case MT_STATUS_ENQUIRY:
if (pc->debug & L3_DEB_CHECK)
l3_debug(pc->st, "l3ni1_check_messagetype_validity mt(%x) OK", mt);
break;
case MT_RESUME: /* RESUME only in user->net */
case MT_SUSPEND: /* SUSPEND only in user->net */
default:
if (pc->debug & (L3_DEB_CHECK | L3_DEB_WARN))
l3_debug(pc->st, "l3ni1_check_messagetype_validity mt(%x) fail", mt);
pc->para.cause = 97;
l3ni1_status_send(pc, 0, NULL);
return (1);
}
return (0);
}
static void
l3ni1_std_ie_err(struct l3_process *pc, int ret) {
if (pc->debug & L3_DEB_CHECK)
l3_debug(pc->st, "check_infoelements ret %d", ret);
switch (ret) {
case 0:
break;
case ERR_IE_COMPREHENSION:
pc->para.cause = 96;
l3ni1_status_send(pc, 0, NULL);
break;
case ERR_IE_UNRECOGNIZED:
pc->para.cause = 99;
l3ni1_status_send(pc, 0, NULL);
break;
case ERR_IE_LENGTH:
pc->para.cause = 100;
l3ni1_status_send(pc, 0, NULL);
break;
case ERR_IE_SEQUENCE:
default:
break;
}
}
static int
l3ni1_get_channel_id(struct l3_process *pc, struct sk_buff *skb) {
u_char *p;
p = skb->data;
if ((p = findie(p, skb->len, IE_CHANNEL_ID, 0))) {
p++;
if (*p != 1) { /* len for BRI = 1 */
if (pc->debug & L3_DEB_WARN)
l3_debug(pc->st, "wrong chid len %d", *p);
return (-2);
}
p++;
if (*p & 0x60) { /* only base rate interface */
if (pc->debug & L3_DEB_WARN)
l3_debug(pc->st, "wrong chid %x", *p);
return (-3);
}
return (*p & 0x3);
} else
return (-1);
}
static int
l3ni1_get_cause(struct l3_process *pc, struct sk_buff *skb) {
u_char l, i = 0;
u_char *p;
p = skb->data;
pc->para.cause = 31;
pc->para.loc = 0;
if ((p = findie(p, skb->len, IE_CAUSE, 0))) {
p++;
l = *p++;
if (l > 30)
return (1);
if (l) {
pc->para.loc = *p++;
l--;
} else {
return (2);
}
if (l && !(pc->para.loc & 0x80)) {
l--;
p++; /* skip recommendation */
}
if (l) {
pc->para.cause = *p++;
l--;
if (!(pc->para.cause & 0x80))
return (3);
} else
return (4);
while (l && (i < 6)) {
pc->para.diag[i++] = *p++;
l--;
}
} else
return (-1);
return (0);
}
static void
l3ni1_msg_with_uus(struct l3_process *pc, u_char cmd)
{
struct sk_buff *skb;
u_char tmp[16 + 40];
u_char *p = tmp;
int l;
MsgHead(p, pc->callref, cmd);
if (pc->prot.ni1.uus1_data[0])
{ *p++ = IE_USER_USER; /* UUS info element */
*p++ = strlen(pc->prot.ni1.uus1_data) + 1;
*p++ = 0x04; /* IA5 chars */
strcpy(p, pc->prot.ni1.uus1_data);
p += strlen(pc->prot.ni1.uus1_data);
pc->prot.ni1.uus1_data[0] = '\0';
}
l = p - tmp;
if (!(skb = l3_alloc_skb(l)))
return;
memcpy(skb_put(skb, l), tmp, l);
l3_msg(pc->st, DL_DATA | REQUEST, skb);
} /* l3ni1_msg_with_uus */
static void
l3ni1_release_req(struct l3_process *pc, u_char pr, void *arg)
{
StopAllL3Timer(pc);
newl3state(pc, 19);
if (!pc->prot.ni1.uus1_data[0])
l3ni1_message(pc, MT_RELEASE);
else
l3ni1_msg_with_uus(pc, MT_RELEASE);
L3AddTimer(&pc->timer, T308, CC_T308_1);
}
static void
l3ni1_release_cmpl(struct l3_process *pc, u_char pr, void *arg)
{
struct sk_buff *skb = arg;
int ret;
if ((ret = l3ni1_get_cause(pc, skb)) > 0) {
if (pc->debug & L3_DEB_WARN)
l3_debug(pc->st, "RELCMPL get_cause ret(%d)", ret);
} else if (ret < 0)
pc->para.cause = NO_CAUSE;
StopAllL3Timer(pc);
newl3state(pc, 0);
pc->st->l3.l3l4(pc->st, CC_RELEASE | CONFIRM, pc);
ni1_release_l3_process(pc);
}
#if EXT_BEARER_CAPS
static u_char *
EncodeASyncParams(u_char *p, u_char si2)
{ // 7c 06 88 90 21 42 00 bb
p[0] = 0;
p[1] = 0x40; // Intermediate rate: 16 kbit/s jj 2000.02.19
p[2] = 0x80;
if (si2 & 32) // 7 data bits
p[2] += 16;
else // 8 data bits
p[2] += 24;
if (si2 & 16) // 2 stop bits
p[2] += 96;
else // 1 stop bit
p[2] += 32;
if (si2 & 8) // even parity
p[2] += 2;
else // no parity
p[2] += 3;
switch (si2 & 0x07) {
case 0:
p[0] = 66; // 1200 bit/s
break;
case 1:
p[0] = 88; // 1200/75 bit/s
break;
case 2:
p[0] = 87; // 75/1200 bit/s
break;
case 3:
p[0] = 67; // 2400 bit/s
break;
case 4:
p[0] = 69; // 4800 bit/s
break;
case 5:
p[0] = 72; // 9600 bit/s
break;
case 6:
p[0] = 73; // 14400 bit/s
break;
case 7:
p[0] = 75; // 19200 bit/s
break;
}
return p + 3;
}
static u_char
EncodeSyncParams(u_char si2, u_char ai)
{
switch (si2) {
case 0:
return ai + 2; // 1200 bit/s
case 1:
return ai + 24; // 1200/75 bit/s
case 2:
return ai + 23; // 75/1200 bit/s
case 3:
return ai + 3; // 2400 bit/s
case 4:
return ai + 5; // 4800 bit/s
case 5:
return ai + 8; // 9600 bit/s
case 6:
return ai + 9; // 14400 bit/s
case 7:
return ai + 11; // 19200 bit/s
case 8:
return ai + 14; // 48000 bit/s
case 9:
return ai + 15; // 56000 bit/s
case 15:
return ai + 40; // negotiate bit/s
default:
break;
}
return ai;
}
static u_char
DecodeASyncParams(u_char si2, u_char *p)
{
u_char info;
switch (p[5]) {
case 66: // 1200 bit/s
break; // si2 don't change
case 88: // 1200/75 bit/s
si2 += 1;
break;
case 87: // 75/1200 bit/s
si2 += 2;
break;
case 67: // 2400 bit/s
si2 += 3;
break;
case 69: // 4800 bit/s
si2 += 4;
break;
case 72: // 9600 bit/s
si2 += 5;
break;
case 73: // 14400 bit/s
si2 += 6;
break;
case 75: // 19200 bit/s
si2 += 7;
break;
}
info = p[7] & 0x7f;
if ((info & 16) && (!(info & 8))) // 7 data bits
si2 += 32; // else 8 data bits
if ((info & 96) == 96) // 2 stop bits
si2 += 16; // else 1 stop bit
if ((info & 2) && (!(info & 1))) // even parity
si2 += 8; // else no parity
return si2;
}
static u_char
DecodeSyncParams(u_char si2, u_char info)
{
info &= 0x7f;
switch (info) {
case 40: // bit/s negotiation failed ai := 165 not 175!
return si2 + 15;
case 15: // 56000 bit/s failed, ai := 0 not 169 !
return si2 + 9;
case 14: // 48000 bit/s
return si2 + 8;
case 11: // 19200 bit/s
return si2 + 7;
case 9: // 14400 bit/s
return si2 + 6;
case 8: // 9600 bit/s
return si2 + 5;
case 5: // 4800 bit/s
return si2 + 4;
case 3: // 2400 bit/s
return si2 + 3;
case 23: // 75/1200 bit/s
return si2 + 2;
case 24: // 1200/75 bit/s
return si2 + 1;
default: // 1200 bit/s
return si2;
}
}
static u_char
DecodeSI2(struct sk_buff *skb)
{
u_char *p; //, *pend=skb->data + skb->len;
if ((p = findie(skb->data, skb->len, 0x7c, 0))) {
switch (p[4] & 0x0f) {
case 0x01:
if (p[1] == 0x04) // sync. Bitratenadaption
return DecodeSyncParams(160, p[5]); // V.110/X.30
else if (p[1] == 0x06) // async. Bitratenadaption
return DecodeASyncParams(192, p); // V.110/X.30
break;
case 0x08: // if (p[5] == 0x02) // sync. Bitratenadaption
if (p[1] > 3)
return DecodeSyncParams(176, p[5]); // V.120
break;
}
}
return 0;
}
#endif
static void
l3ni1_setup_req(struct l3_process *pc, u_char pr,
void *arg)
{
struct sk_buff *skb;
u_char tmp[128];
u_char *p = tmp;
u_char *teln;
u_char *sub;
u_char *sp;
int l;
MsgHead(p, pc->callref, MT_SETUP);
teln = pc->para.setup.phone;
*p++ = 0xa1; /* complete indicator */
/*
* Set Bearer Capability, Map info from 1TR6-convention to NI1
*/
switch (pc->para.setup.si1) {
case 1: /* Telephony */
*p++ = IE_BEARER;
*p++ = 0x3; /* Length */
*p++ = 0x90; /* 3.1khz Audio */
*p++ = 0x90; /* Circuit-Mode 64kbps */
*p++ = 0xa2; /* u-Law Audio */
break;
case 5: /* Datatransmission 64k, BTX */
case 7: /* Datatransmission 64k */
default:
*p++ = IE_BEARER;
*p++ = 0x2; /* Length */
*p++ = 0x88; /* Coding Std. CCITT, unrestr. dig. Inform. */
*p++ = 0x90; /* Circuit-Mode 64kbps */
break;
}
sub = NULL;
sp = teln;
while (*sp) {
if ('.' == *sp) {
sub = sp;
*sp = 0;
} else
sp++;
}
*p++ = IE_KEYPAD;
*p++ = strlen(teln);
while (*teln)
*p++ = (*teln++) & 0x7F;
if (sub)
*sub++ = '.';
#if EXT_BEARER_CAPS
if ((pc->para.setup.si2 >= 160) && (pc->para.setup.si2 <= 175)) { // sync. Bitratenadaption, V.110/X.30
*p++ = IE_LLC;
*p++ = 0x04;
*p++ = 0x88;
*p++ = 0x90;
*p++ = 0x21;
*p++ = EncodeSyncParams(pc->para.setup.si2 - 160, 0x80);
} else if ((pc->para.setup.si2 >= 176) && (pc->para.setup.si2 <= 191)) { // sync. Bitratenadaption, V.120
*p++ = IE_LLC;
*p++ = 0x05;
*p++ = 0x88;
*p++ = 0x90;
*p++ = 0x28;
*p++ = EncodeSyncParams(pc->para.setup.si2 - 176, 0);
*p++ = 0x82;
} else if (pc->para.setup.si2 >= 192) { // async. Bitratenadaption, V.110/X.30
*p++ = IE_LLC;
*p++ = 0x06;
*p++ = 0x88;
*p++ = 0x90;
*p++ = 0x21;
p = EncodeASyncParams(p, pc->para.setup.si2 - 192);
} else {
switch (pc->para.setup.si1) {
case 1: /* Telephony */
*p++ = IE_LLC;
*p++ = 0x3; /* Length */
*p++ = 0x90; /* Coding Std. CCITT, 3.1 kHz audio */
*p++ = 0x90; /* Circuit-Mode 64kbps */
*p++ = 0xa2; /* u-Law Audio */
break;
case 5: /* Datatransmission 64k, BTX */
case 7: /* Datatransmission 64k */
default:
*p++ = IE_LLC;
*p++ = 0x2; /* Length */
*p++ = 0x88; /* Coding Std. CCITT, unrestr. dig. Inform. */
*p++ = 0x90; /* Circuit-Mode 64kbps */
break;
}
}
#endif
l = p - tmp;
if (!(skb = l3_alloc_skb(l)))
{
return;
}
memcpy(skb_put(skb, l), tmp, l);
L3DelTimer(&pc->timer);
L3AddTimer(&pc->timer, T303, CC_T303);
newl3state(pc, 1);
l3_msg(pc->st, DL_DATA | REQUEST, skb);
}
static void
l3ni1_call_proc(struct l3_process *pc, u_char pr, void *arg)
{
struct sk_buff *skb = arg;
int id, ret;
if ((id = l3ni1_get_channel_id(pc, skb)) >= 0) {
if ((0 == id) || ((3 == id) && (0x10 == pc->para.moderate))) {
if (pc->debug & L3_DEB_WARN)
l3_debug(pc->st, "setup answer with wrong chid %x", id);
pc->para.cause = 100;
l3ni1_status_send(pc, pr, NULL);
return;
}
pc->para.bchannel = id;
} else if (1 == pc->state) {
if (pc->debug & L3_DEB_WARN)
l3_debug(pc->st, "setup answer wrong chid (ret %d)", id);
if (id == -1)
pc->para.cause = 96;
else
pc->para.cause = 100;
l3ni1_status_send(pc, pr, NULL);
return;
}
/* Now we are on none mandatory IEs */
ret = check_infoelements(pc, skb, ie_CALL_PROCEEDING);
if (ERR_IE_COMPREHENSION == ret) {
l3ni1_std_ie_err(pc, ret);
return;
}
L3DelTimer(&pc->timer);
newl3state(pc, 3);
L3AddTimer(&pc->timer, T310, CC_T310);
if (ret) /* STATUS for none mandatory IE errors after actions are taken */
l3ni1_std_ie_err(pc, ret);
pc->st->l3.l3l4(pc->st, CC_PROCEEDING | INDICATION, pc);
}
static void
l3ni1_setup_ack(struct l3_process *pc, u_char pr, void *arg)
{
struct sk_buff *skb = arg;
int id, ret;
if ((id = l3ni1_get_channel_id(pc, skb)) >= 0) {
if ((0 == id) || ((3 == id) && (0x10 == pc->para.moderate))) {
if (pc->debug & L3_DEB_WARN)
l3_debug(pc->st, "setup answer with wrong chid %x", id);
pc->para.cause = 100;
l3ni1_status_send(pc, pr, NULL);
return;
}
pc->para.bchannel = id;
} else {
if (pc->debug & L3_DEB_WARN)
l3_debug(pc->st, "setup answer wrong chid (ret %d)", id);
if (id == -1)
pc->para.cause = 96;
else
pc->para.cause = 100;
l3ni1_status_send(pc, pr, NULL);
return;
}
/* Now we are on none mandatory IEs */
ret = check_infoelements(pc, skb, ie_SETUP_ACKNOWLEDGE);
if (ERR_IE_COMPREHENSION == ret) {
l3ni1_std_ie_err(pc, ret);
return;
}
L3DelTimer(&pc->timer);
newl3state(pc, 2);
L3AddTimer(&pc->timer, T304, CC_T304);
if (ret) /* STATUS for none mandatory IE errors after actions are taken */
l3ni1_std_ie_err(pc, ret);
pc->st->l3.l3l4(pc->st, CC_MORE_INFO | INDICATION, pc);
}
static void
l3ni1_disconnect(struct l3_process *pc, u_char pr, void *arg)
{
struct sk_buff *skb = arg;
u_char *p;
int ret;
u_char cause = 0;
StopAllL3Timer(pc);
if ((ret = l3ni1_get_cause(pc, skb))) {
if (pc->debug & L3_DEB_WARN)
l3_debug(pc->st, "DISC get_cause ret(%d)", ret);
if (ret < 0)
cause = 96;
else if (ret > 0)
cause = 100;
}
if ((p = findie(skb->data, skb->len, IE_FACILITY, 0)))
l3ni1_parse_facility(pc->st, pc, pc->callref, p);
ret = check_infoelements(pc, skb, ie_DISCONNECT);
if (ERR_IE_COMPREHENSION == ret)
cause = 96;
else if ((!cause) && (ERR_IE_UNRECOGNIZED == ret))
cause = 99;
ret = pc->state;
newl3state(pc, 12);
if (cause)
newl3state(pc, 19);
if (11 != ret)
pc->st->l3.l3l4(pc->st, CC_DISCONNECT | INDICATION, pc);
else if (!cause)
l3ni1_release_req(pc, pr, NULL);
if (cause) {
l3ni1_message_cause(pc, MT_RELEASE, cause);
L3AddTimer(&pc->timer, T308, CC_T308_1);
}
}
static void
l3ni1_connect(struct l3_process *pc, u_char pr, void *arg)
{
struct sk_buff *skb = arg;
int ret;
ret = check_infoelements(pc, skb, ie_CONNECT);
if (ERR_IE_COMPREHENSION == ret) {
l3ni1_std_ie_err(pc, ret);
return;
}
L3DelTimer(&pc->timer); /* T310 */
newl3state(pc, 10);
pc->para.chargeinfo = 0;
/* here should inserted COLP handling KKe */
if (ret)
l3ni1_std_ie_err(pc, ret);
pc->st->l3.l3l4(pc->st, CC_SETUP | CONFIRM, pc);
}
static void
l3ni1_alerting(struct l3_process *pc, u_char pr, void *arg)
{
struct sk_buff *skb = arg;
int ret;
ret = check_infoelements(pc, skb, ie_ALERTING);
if (ERR_IE_COMPREHENSION == ret) {
l3ni1_std_ie_err(pc, ret);
return;
}
L3DelTimer(&pc->timer); /* T304 */
newl3state(pc, 4);
if (ret)
l3ni1_std_ie_err(pc, ret);
pc->st->l3.l3l4(pc->st, CC_ALERTING | INDICATION, pc);
}
static void
l3ni1_setup(struct l3_process *pc, u_char pr, void *arg)
{
u_char *p;
int bcfound = 0;
char tmp[80];
struct sk_buff *skb = arg;
int id;
int err = 0;
/*
* Bearer Capabilities
*/
p = skb->data;
/* only the first occurrence 'll be detected ! */
if ((p = findie(p, skb->len, 0x04, 0))) {
if ((p[1] < 2) || (p[1] > 11))
err = 1;
else {
pc->para.setup.si2 = 0;
switch (p[2] & 0x7f) {
case 0x00: /* Speech */
case 0x10: /* 3.1 Khz audio */
pc->para.setup.si1 = 1;
break;
case 0x08: /* Unrestricted digital information */
pc->para.setup.si1 = 7;
/* JIM, 05.11.97 I wanna set service indicator 2 */
#if EXT_BEARER_CAPS
pc->para.setup.si2 = DecodeSI2(skb);
#endif
break;
case 0x09: /* Restricted digital information */
pc->para.setup.si1 = 2;
break;
case 0x11:
/* Unrestr. digital information with
* tones/announcements ( or 7 kHz audio
*/
pc->para.setup.si1 = 3;
break;
case 0x18: /* Video */
pc->para.setup.si1 = 4;
break;
default:
err = 2;
break;
}
switch (p[3] & 0x7f) {
case 0x40: /* packed mode */
pc->para.setup.si1 = 8;
break;
case 0x10: /* 64 kbit */
case 0x11: /* 2*64 kbit */
case 0x13: /* 384 kbit */
case 0x15: /* 1536 kbit */
case 0x17: /* 1920 kbit */
pc->para.moderate = p[3] & 0x7f;
break;
default:
err = 3;
break;
}
}
if (pc->debug & L3_DEB_SI)
l3_debug(pc->st, "SI=%d, AI=%d",
pc->para.setup.si1, pc->para.setup.si2);
if (err) {
if (pc->debug & L3_DEB_WARN)
l3_debug(pc->st, "setup with wrong bearer(l=%d:%x,%x)",
p[1], p[2], p[3]);
pc->para.cause = 100;
l3ni1_msg_without_setup(pc, pr, NULL);
return;
}
} else {
if (pc->debug & L3_DEB_WARN)
l3_debug(pc->st, "setup without bearer capabilities");
/* ETS 300-104 1.3.3 */
pc->para.cause = 96;
l3ni1_msg_without_setup(pc, pr, NULL);
return;
}
/*
* Channel Identification
*/
if ((id = l3ni1_get_channel_id(pc, skb)) >= 0) {
if ((pc->para.bchannel = id)) {
if ((3 == id) && (0x10 == pc->para.moderate)) {
if (pc->debug & L3_DEB_WARN)
l3_debug(pc->st, "setup with wrong chid %x",
id);
pc->para.cause = 100;
l3ni1_msg_without_setup(pc, pr, NULL);
return;
}
bcfound++;
} else
{ if (pc->debug & L3_DEB_WARN)
l3_debug(pc->st, "setup without bchannel, call waiting");
bcfound++;
}
} else {
if (pc->debug & L3_DEB_WARN)
l3_debug(pc->st, "setup with wrong chid ret %d", id);
if (id == -1)
pc->para.cause = 96;
else
pc->para.cause = 100;
l3ni1_msg_without_setup(pc, pr, NULL);
return;
}
/* Now we are on none mandatory IEs */
err = check_infoelements(pc, skb, ie_SETUP);
if (ERR_IE_COMPREHENSION == err) {
pc->para.cause = 96;
l3ni1_msg_without_setup(pc, pr, NULL);
return;
}
p = skb->data;
if ((p = findie(p, skb->len, 0x70, 0)))
iecpy(pc->para.setup.eazmsn, p, 1);
else
pc->para.setup.eazmsn[0] = 0;
p = skb->data;
if ((p = findie(p, skb->len, 0x71, 0))) {
/* Called party subaddress */
if ((p[1] >= 2) && (p[2] == 0x80) && (p[3] == 0x50)) {
tmp[0] = '.';
iecpy(&tmp[1], p, 2);
strcat(pc->para.setup.eazmsn, tmp);
} else if (pc->debug & L3_DEB_WARN)
l3_debug(pc->st, "wrong called subaddress");
}
p = skb->data;
if ((p = findie(p, skb->len, 0x6c, 0))) {
pc->para.setup.plan = p[2];
if (p[2] & 0x80) {
iecpy(pc->para.setup.phone, p, 1);
pc->para.setup.screen = 0;
} else {
iecpy(pc->para.setup.phone, p, 2);
pc->para.setup.screen = p[3];
}
} else {
pc->para.setup.phone[0] = 0;
pc->para.setup.plan = 0;
pc->para.setup.screen = 0;
}
p = skb->data;
if ((p = findie(p, skb->len, 0x6d, 0))) {
/* Calling party subaddress */
if ((p[1] >= 2) && (p[2] == 0x80) && (p[3] == 0x50)) {
tmp[0] = '.';
iecpy(&tmp[1], p, 2);
strcat(pc->para.setup.phone, tmp);
} else if (pc->debug & L3_DEB_WARN)
l3_debug(pc->st, "wrong calling subaddress");
}
newl3state(pc, 6);
if (err) /* STATUS for none mandatory IE errors after actions are taken */
l3ni1_std_ie_err(pc, err);
pc->st->l3.l3l4(pc->st, CC_SETUP | INDICATION, pc);
}
static void
l3ni1_reset(struct l3_process *pc, u_char pr, void *arg)
{
ni1_release_l3_process(pc);
}
static void
l3ni1_disconnect_req(struct l3_process *pc, u_char pr, void *arg)
{
struct sk_buff *skb;
u_char tmp[16 + 40];
u_char *p = tmp;
int l;
u_char cause = 16;
if (pc->para.cause != NO_CAUSE)
cause = pc->para.cause;
StopAllL3Timer(pc);
MsgHead(p, pc->callref, MT_DISCONNECT);
*p++ = IE_CAUSE;
*p++ = 0x2;
*p++ = 0x80;
*p++ = cause | 0x80;
if (pc->prot.ni1.uus1_data[0])
{ *p++ = IE_USER_USER; /* UUS info element */
*p++ = strlen(pc->prot.ni1.uus1_data) + 1;
*p++ = 0x04; /* IA5 chars */
strcpy(p, pc->prot.ni1.uus1_data);
p += strlen(pc->prot.ni1.uus1_data);
pc->prot.ni1.uus1_data[0] = '\0';
}
l = p - tmp;
if (!(skb = l3_alloc_skb(l)))
return;
memcpy(skb_put(skb, l), tmp, l);
newl3state(pc, 11);
l3_msg(pc->st, DL_DATA | REQUEST, skb);
L3AddTimer(&pc->timer, T305, CC_T305);
}
static void
l3ni1_setup_rsp(struct l3_process *pc, u_char pr,
void *arg)
{
if (!pc->para.bchannel)
{ if (pc->debug & L3_DEB_WARN)
l3_debug(pc->st, "D-chan connect for waiting call");
l3ni1_disconnect_req(pc, pr, arg);
return;
}
newl3state(pc, 8);
if (pc->debug & L3_DEB_WARN)
l3_debug(pc->st, "D-chan connect for waiting call");
l3ni1_message_plus_chid(pc, MT_CONNECT); /* GE 05/09/00 */
L3DelTimer(&pc->timer);
L3AddTimer(&pc->timer, T313, CC_T313);
}
static void
l3ni1_connect_ack(struct l3_process *pc, u_char pr, void *arg)
{
struct sk_buff *skb = arg;
int ret;
ret = check_infoelements(pc, skb, ie_CONNECT_ACKNOWLEDGE);
if (ERR_IE_COMPREHENSION == ret) {
l3ni1_std_ie_err(pc, ret);
return;
}
newl3state(pc, 10);
L3DelTimer(&pc->timer);
if (ret)
l3ni1_std_ie_err(pc, ret);
pc->st->l3.l3l4(pc->st, CC_SETUP_COMPL | INDICATION, pc);
}
static void
l3ni1_reject_req(struct l3_process *pc, u_char pr, void *arg)
{
struct sk_buff *skb;
u_char tmp[16];
u_char *p = tmp;
int l;
u_char cause = 21;
if (pc->para.cause != NO_CAUSE)
cause = pc->para.cause;
MsgHead(p, pc->callref, MT_RELEASE_COMPLETE);
*p++ = IE_CAUSE;
*p++ = 0x2;
*p++ = 0x80;
*p++ = cause | 0x80;
l = p - tmp;
if (!(skb = l3_alloc_skb(l)))
return;
memcpy(skb_put(skb, l), tmp, l);
l3_msg(pc->st, DL_DATA | REQUEST, skb);
pc->st->l3.l3l4(pc->st, CC_RELEASE | INDICATION, pc);
newl3state(pc, 0);
ni1_release_l3_process(pc);
}
static void
l3ni1_release(struct l3_process *pc, u_char pr, void *arg)
{
struct sk_buff *skb = arg;
u_char *p;
int ret, cause = 0;
StopAllL3Timer(pc);
if ((ret = l3ni1_get_cause(pc, skb)) > 0) {
if (pc->debug & L3_DEB_WARN)
l3_debug(pc->st, "REL get_cause ret(%d)", ret);
} else if (ret < 0)
pc->para.cause = NO_CAUSE;
if ((p = findie(skb->data, skb->len, IE_FACILITY, 0))) {
l3ni1_parse_facility(pc->st, pc, pc->callref, p);
}
if ((ret < 0) && (pc->state != 11))
cause = 96;
else if (ret > 0)
cause = 100;
ret = check_infoelements(pc, skb, ie_RELEASE);
if (ERR_IE_COMPREHENSION == ret)
cause = 96;
else if ((ERR_IE_UNRECOGNIZED == ret) && (!cause))
cause = 99;
if (cause)
l3ni1_message_cause(pc, MT_RELEASE_COMPLETE, cause);
else
l3ni1_message(pc, MT_RELEASE_COMPLETE);
pc->st->l3.l3l4(pc->st, CC_RELEASE | INDICATION, pc);
newl3state(pc, 0);
ni1_release_l3_process(pc);
}
static void
l3ni1_alert_req(struct l3_process *pc, u_char pr,
void *arg)
{
newl3state(pc, 7);
if (!pc->prot.ni1.uus1_data[0])
l3ni1_message(pc, MT_ALERTING);
else
l3ni1_msg_with_uus(pc, MT_ALERTING);
}
static void
l3ni1_proceed_req(struct l3_process *pc, u_char pr,
void *arg)
{
newl3state(pc, 9);
l3ni1_message(pc, MT_CALL_PROCEEDING);
pc->st->l3.l3l4(pc->st, CC_PROCEED_SEND | INDICATION, pc);
}
static void
l3ni1_setup_ack_req(struct l3_process *pc, u_char pr,
void *arg)
{
newl3state(pc, 25);
L3DelTimer(&pc->timer);
L3AddTimer(&pc->timer, T302, CC_T302);
l3ni1_message(pc, MT_SETUP_ACKNOWLEDGE);
}
/********************************************/
/* deliver a incoming display message to HL */
/********************************************/
static void
l3ni1_deliver_display(struct l3_process *pc, int pr, u_char *infp)
{ u_char len;
isdn_ctrl ic;
struct IsdnCardState *cs;
char *p;
if (*infp++ != IE_DISPLAY) return;
if ((len = *infp++) > 80) return; /* total length <= 82 */
if (!pc->chan) return;
p = ic.parm.display;
while (len--)
*p++ = *infp++;
*p = '\0';
ic.command = ISDN_STAT_DISPLAY;
cs = pc->st->l1.hardware;
ic.driver = cs->myid;
ic.arg = pc->chan->chan;
cs->iif.statcallb(&ic);
} /* l3ni1_deliver_display */
static void
l3ni1_progress(struct l3_process *pc, u_char pr, void *arg)
{
struct sk_buff *skb = arg;
int err = 0;
u_char *p;
if ((p = findie(skb->data, skb->len, IE_PROGRESS, 0))) {
if (p[1] != 2) {
err = 1;
pc->para.cause = 100;
} else if (!(p[2] & 0x70)) {
switch (p[2]) {
case 0x80:
case 0x81:
case 0x82:
case 0x84:
case 0x85:
case 0x87:
case 0x8a:
switch (p[3]) {
case 0x81:
case 0x82:
case 0x83:
case 0x84:
case 0x88:
break;
default:
err = 2;
pc->para.cause = 100;
break;
}
break;
default:
err = 3;
pc->para.cause = 100;
break;
}
}
} else {
pc->para.cause = 96;
err = 4;
}
if (err) {
if (pc->debug & L3_DEB_WARN)
l3_debug(pc->st, "progress error %d", err);
l3ni1_status_send(pc, pr, NULL);
return;
}
/* Now we are on none mandatory IEs */
err = check_infoelements(pc, skb, ie_PROGRESS);
if (err)
l3ni1_std_ie_err(pc, err);
if (ERR_IE_COMPREHENSION != err)
pc->st->l3.l3l4(pc->st, CC_PROGRESS | INDICATION, pc);
}
static void
l3ni1_notify(struct l3_process *pc, u_char pr, void *arg)
{
struct sk_buff *skb = arg;
int err = 0;
u_char *p;
if ((p = findie(skb->data, skb->len, IE_NOTIFY, 0))) {
if (p[1] != 1) {
err = 1;
pc->para.cause = 100;
} else {
switch (p[2]) {
case 0x80:
case 0x81:
case 0x82:
break;
default:
pc->para.cause = 100;
err = 2;
break;
}
}
} else {
pc->para.cause = 96;
err = 3;
}
if (err) {
if (pc->debug & L3_DEB_WARN)
l3_debug(pc->st, "notify error %d", err);
l3ni1_status_send(pc, pr, NULL);
return;
}
/* Now we are on none mandatory IEs */
err = check_infoelements(pc, skb, ie_NOTIFY);
if (err)
l3ni1_std_ie_err(pc, err);
if (ERR_IE_COMPREHENSION != err)
pc->st->l3.l3l4(pc->st, CC_NOTIFY | INDICATION, pc);
}
static void
l3ni1_status_enq(struct l3_process *pc, u_char pr, void *arg)
{
int ret;
struct sk_buff *skb = arg;
ret = check_infoelements(pc, skb, ie_STATUS_ENQUIRY);
l3ni1_std_ie_err(pc, ret);
pc->para.cause = 30; /* response to STATUS_ENQUIRY */
l3ni1_status_send(pc, pr, NULL);
}
static void
l3ni1_information(struct l3_process *pc, u_char pr, void *arg)
{
int ret;
struct sk_buff *skb = arg;
u_char *p;
char tmp[32];
ret = check_infoelements(pc, skb, ie_INFORMATION);
if (ret)
l3ni1_std_ie_err(pc, ret);
if (pc->state == 25) { /* overlap receiving */
L3DelTimer(&pc->timer);
p = skb->data;
if ((p = findie(p, skb->len, 0x70, 0))) {
iecpy(tmp, p, 1);
strcat(pc->para.setup.eazmsn, tmp);
pc->st->l3.l3l4(pc->st, CC_MORE_INFO | INDICATION, pc);
}
L3AddTimer(&pc->timer, T302, CC_T302);
}
}
/******************************/
/* handle deflection requests */
/******************************/
static void l3ni1_redir_req(struct l3_process *pc, u_char pr, void *arg)
{
struct sk_buff *skb;
u_char tmp[128];
u_char *p = tmp;
u_char *subp;
u_char len_phone = 0;
u_char len_sub = 0;
int l;
strcpy(pc->prot.ni1.uus1_data, pc->chan->setup.eazmsn); /* copy uus element if available */
if (!pc->chan->setup.phone[0])
{ pc->para.cause = -1;
l3ni1_disconnect_req(pc, pr, arg); /* disconnect immediately */
return;
} /* only uus */
if (pc->prot.ni1.invoke_id)
free_invoke_id(pc->st, pc->prot.ni1.invoke_id);
if (!(pc->prot.ni1.invoke_id = new_invoke_id(pc->st)))
return;
MsgHead(p, pc->callref, MT_FACILITY);
for (subp = pc->chan->setup.phone; (*subp) && (*subp != '.'); subp++) len_phone++; /* len of phone number */
if (*subp++ == '.') len_sub = strlen(subp) + 2; /* length including info subaddress element */
*p++ = 0x1c; /* Facility info element */
*p++ = len_phone + len_sub + 2 + 2 + 8 + 3 + 3; /* length of element */
*p++ = 0x91; /* remote operations protocol */
*p++ = 0xa1; /* invoke component */
*p++ = len_phone + len_sub + 2 + 2 + 8 + 3; /* length of data */
*p++ = 0x02; /* invoke id tag, integer */
*p++ = 0x01; /* length */
*p++ = pc->prot.ni1.invoke_id; /* invoke id */
*p++ = 0x02; /* operation value tag, integer */
*p++ = 0x01; /* length */
*p++ = 0x0D; /* Call Deflect */
*p++ = 0x30; /* sequence phone number */
*p++ = len_phone + 2 + 2 + 3 + len_sub; /* length */
*p++ = 0x30; /* Deflected to UserNumber */
*p++ = len_phone + 2 + len_sub; /* length */
*p++ = 0x80; /* NumberDigits */
*p++ = len_phone; /* length */
for (l = 0; l < len_phone; l++)
*p++ = pc->chan->setup.phone[l];
if (len_sub)
{ *p++ = 0x04; /* called party subaddress */
*p++ = len_sub - 2;
while (*subp) *p++ = *subp++;
}
*p++ = 0x01; /* screening identifier */
*p++ = 0x01;
*p++ = pc->chan->setup.screen;
l = p - tmp;
if (!(skb = l3_alloc_skb(l))) return;
memcpy(skb_put(skb, l), tmp, l);
l3_msg(pc->st, DL_DATA | REQUEST, skb);
} /* l3ni1_redir_req */
/********************************************/
/* handle deflection request in early state */
/********************************************/
static void l3ni1_redir_req_early(struct l3_process *pc, u_char pr, void *arg)
{
l3ni1_proceed_req(pc, pr, arg);
l3ni1_redir_req(pc, pr, arg);
} /* l3ni1_redir_req_early */
/***********************************************/
/* handle special commands for this protocol. */
/* Examples are call independent services like */
/* remote operations with dummy callref. */
/***********************************************/
static int l3ni1_cmd_global(struct PStack *st, isdn_ctrl *ic)
{ u_char id;
u_char temp[265];
u_char *p = temp;
int i, l, proc_len;
struct sk_buff *skb;
struct l3_process *pc = NULL;
switch (ic->arg)
{ case NI1_CMD_INVOKE:
if (ic->parm.ni1_io.datalen < 0) return (-2); /* invalid parameter */
for (proc_len = 1, i = ic->parm.ni1_io.proc >> 8; i; i++)
i = i >> 8; /* add one byte */
l = ic->parm.ni1_io.datalen + proc_len + 8; /* length excluding ie header */
if (l > 255)
return (-2); /* too long */
if (!(id = new_invoke_id(st)))
return (0); /* first get a invoke id -> return if no available */
i = -1;
MsgHead(p, i, MT_FACILITY); /* build message head */
*p++ = 0x1C; /* Facility IE */
*p++ = l; /* length of ie */
*p++ = 0x91; /* remote operations */
*p++ = 0xA1; /* invoke */
*p++ = l - 3; /* length of invoke */
*p++ = 0x02; /* invoke id tag */
*p++ = 0x01; /* length is 1 */
*p++ = id; /* invoke id */
*p++ = 0x02; /* operation */
*p++ = proc_len; /* length of operation */
for (i = proc_len; i; i--)
*p++ = (ic->parm.ni1_io.proc >> (i - 1)) & 0xFF;
memcpy(p, ic->parm.ni1_io.data, ic->parm.ni1_io.datalen); /* copy data */
l = (p - temp) + ic->parm.ni1_io.datalen; /* total length */
if (ic->parm.ni1_io.timeout > 0) {
pc = ni1_new_l3_process(st, -1);
if (!pc) {
free_invoke_id(st, id);
return (-2);
}
/* remember id */
pc->prot.ni1.ll_id = ic->parm.ni1_io.ll_id;
/* and procedure */
pc->prot.ni1.proc = ic->parm.ni1_io.proc;
}
if (!(skb = l3_alloc_skb(l)))
{ free_invoke_id(st, id);
if (pc) ni1_release_l3_process(pc);
return (-2);
}
memcpy(skb_put(skb, l), temp, l);
if (pc)
{ pc->prot.ni1.invoke_id = id; /* remember id */
L3AddTimer(&pc->timer, ic->parm.ni1_io.timeout, CC_TNI1_IO | REQUEST);
}
l3_msg(st, DL_DATA | REQUEST, skb);
ic->parm.ni1_io.hl_id = id; /* return id */
return (0);
case NI1_CMD_INVOKE_ABORT:
if ((pc = l3ni1_search_dummy_proc(st, ic->parm.ni1_io.hl_id)))
{ L3DelTimer(&pc->timer); /* remove timer */
ni1_release_l3_process(pc);
return (0);
}
else
{ l3_debug(st, "l3ni1_cmd_global abort unknown id");
return (-2);
}
break;
default:
l3_debug(st, "l3ni1_cmd_global unknown cmd 0x%lx", ic->arg);
return (-1);
} /* switch ic-> arg */
return (-1);
} /* l3ni1_cmd_global */
static void
l3ni1_io_timer(struct l3_process *pc)
{ isdn_ctrl ic;
struct IsdnCardState *cs = pc->st->l1.hardware;
L3DelTimer(&pc->timer); /* remove timer */
ic.driver = cs->myid;
ic.command = ISDN_STAT_PROT;
ic.arg = NI1_STAT_INVOKE_ERR;
ic.parm.ni1_io.hl_id = pc->prot.ni1.invoke_id;
ic.parm.ni1_io.ll_id = pc->prot.ni1.ll_id;
ic.parm.ni1_io.proc = pc->prot.ni1.proc;
ic.parm.ni1_io.timeout = -1;
ic.parm.ni1_io.datalen = 0;
ic.parm.ni1_io.data = NULL;
free_invoke_id(pc->st, pc->prot.ni1.invoke_id);
pc->prot.ni1.invoke_id = 0; /* reset id */
cs->iif.statcallb(&ic);
ni1_release_l3_process(pc);
} /* l3ni1_io_timer */
static void
l3ni1_release_ind(struct l3_process *pc, u_char pr, void *arg)
{
u_char *p;
struct sk_buff *skb = arg;
int callState = 0;
p = skb->data;
if ((p = findie(p, skb->len, IE_CALL_STATE, 0))) {
p++;
if (1 == *p++)
callState = *p;
}
if (callState == 0) {
/* ETS 300-104 7.6.1, 8.6.1, 10.6.1... and 16.1
* set down layer 3 without sending any message
*/
pc->st->l3.l3l4(pc->st, CC_RELEASE | INDICATION, pc);
newl3state(pc, 0);
ni1_release_l3_process(pc);
} else {
pc->st->l3.l3l4(pc->st, CC_IGNORE | INDICATION, pc);
}
}
static void
l3ni1_dummy(struct l3_process *pc, u_char pr, void *arg)
{
}
static void
l3ni1_t302(struct l3_process *pc, u_char pr, void *arg)
{
L3DelTimer(&pc->timer);
pc->para.loc = 0;
pc->para.cause = 28; /* invalid number */
l3ni1_disconnect_req(pc, pr, NULL);
pc->st->l3.l3l4(pc->st, CC_SETUP_ERR, pc);
}
static void
l3ni1_t303(struct l3_process *pc, u_char pr, void *arg)
{
if (pc->N303 > 0) {
pc->N303--;
L3DelTimer(&pc->timer);
l3ni1_setup_req(pc, pr, arg);
} else {
L3DelTimer(&pc->timer);
l3ni1_message_cause(pc, MT_RELEASE_COMPLETE, 102);
pc->st->l3.l3l4(pc->st, CC_NOSETUP_RSP, pc);
ni1_release_l3_process(pc);
}
}
static void
l3ni1_t304(struct l3_process *pc, u_char pr, void *arg)
{
L3DelTimer(&pc->timer);
pc->para.loc = 0;
pc->para.cause = 102;
l3ni1_disconnect_req(pc, pr, NULL);
pc->st->l3.l3l4(pc->st, CC_SETUP_ERR, pc);
}
static void
l3ni1_t305(struct l3_process *pc, u_char pr, void *arg)
{
u_char tmp[16];
u_char *p = tmp;
int l;
struct sk_buff *skb;
u_char cause = 16;
L3DelTimer(&pc->timer);
if (pc->para.cause != NO_CAUSE)
cause = pc->para.cause;
MsgHead(p, pc->callref, MT_RELEASE);
*p++ = IE_CAUSE;
*p++ = 0x2;
*p++ = 0x80;
*p++ = cause | 0x80;
l = p - tmp;
if (!(skb = l3_alloc_skb(l)))
return;
memcpy(skb_put(skb, l), tmp, l);
newl3state(pc, 19);
l3_msg(pc->st, DL_DATA | REQUEST, skb);
L3AddTimer(&pc->timer, T308, CC_T308_1);
}
static void
l3ni1_t310(struct l3_process *pc, u_char pr, void *arg)
{
L3DelTimer(&pc->timer);
pc->para.loc = 0;
pc->para.cause = 102;
l3ni1_disconnect_req(pc, pr, NULL);
pc->st->l3.l3l4(pc->st, CC_SETUP_ERR, pc);
}
static void
l3ni1_t313(struct l3_process *pc, u_char pr, void *arg)
{
L3DelTimer(&pc->timer);
pc->para.loc = 0;
pc->para.cause = 102;
l3ni1_disconnect_req(pc, pr, NULL);
pc->st->l3.l3l4(pc->st, CC_CONNECT_ERR, pc);
}
static void
l3ni1_t308_1(struct l3_process *pc, u_char pr, void *arg)
{
newl3state(pc, 19);
L3DelTimer(&pc->timer);
l3ni1_message(pc, MT_RELEASE);
L3AddTimer(&pc->timer, T308, CC_T308_2);
}
static void
l3ni1_t308_2(struct l3_process *pc, u_char pr, void *arg)
{
L3DelTimer(&pc->timer);
pc->st->l3.l3l4(pc->st, CC_RELEASE_ERR, pc);
ni1_release_l3_process(pc);
}
static void
l3ni1_t318(struct l3_process *pc, u_char pr, void *arg)
{
L3DelTimer(&pc->timer);
pc->para.cause = 102; /* Timer expiry */
pc->para.loc = 0; /* local */
pc->st->l3.l3l4(pc->st, CC_RESUME_ERR, pc);
newl3state(pc, 19);
l3ni1_message(pc, MT_RELEASE);
L3AddTimer(&pc->timer, T308, CC_T308_1);
}
static void
l3ni1_t319(struct l3_process *pc, u_char pr, void *arg)
{
L3DelTimer(&pc->timer);
pc->para.cause = 102; /* Timer expiry */
pc->para.loc = 0; /* local */
pc->st->l3.l3l4(pc->st, CC_SUSPEND_ERR, pc);
newl3state(pc, 10);
}
static void
l3ni1_restart(struct l3_process *pc, u_char pr, void *arg)
{
L3DelTimer(&pc->timer);
pc->st->l3.l3l4(pc->st, CC_RELEASE | INDICATION, pc);
ni1_release_l3_process(pc);
}
static void
l3ni1_status(struct l3_process *pc, u_char pr, void *arg)
{
u_char *p;
struct sk_buff *skb = arg;
int ret;
u_char cause = 0, callState = 0;
if ((ret = l3ni1_get_cause(pc, skb))) {
if (pc->debug & L3_DEB_WARN)
l3_debug(pc->st, "STATUS get_cause ret(%d)", ret);
if (ret < 0)
cause = 96;
else if (ret > 0)
cause = 100;
}
if ((p = findie(skb->data, skb->len, IE_CALL_STATE, 0))) {
p++;
if (1 == *p++) {
callState = *p;
if (!ie_in_set(pc, *p, l3_valid_states))
cause = 100;
} else
cause = 100;
} else
cause = 96;
if (!cause) { /* no error before */
ret = check_infoelements(pc, skb, ie_STATUS);
if (ERR_IE_COMPREHENSION == ret)
cause = 96;
else if (ERR_IE_UNRECOGNIZED == ret)
cause = 99;
}
if (cause) {
u_char tmp;
if (pc->debug & L3_DEB_WARN)
l3_debug(pc->st, "STATUS error(%d/%d)", ret, cause);
tmp = pc->para.cause;
pc->para.cause = cause;
l3ni1_status_send(pc, 0, NULL);
if (cause == 99)
pc->para.cause = tmp;
else
return;
}
cause = pc->para.cause;
if (((cause & 0x7f) == 111) && (callState == 0)) {
/* ETS 300-104 7.6.1, 8.6.1, 10.6.1...
* if received MT_STATUS with cause == 111 and call
* state == 0, then we must set down layer 3
*/
pc->st->l3.l3l4(pc->st, CC_RELEASE | INDICATION, pc);
newl3state(pc, 0);
ni1_release_l3_process(pc);
}
}
static void
l3ni1_facility(struct l3_process *pc, u_char pr, void *arg)
{
struct sk_buff *skb = arg;
int ret;
ret = check_infoelements(pc, skb, ie_FACILITY);
l3ni1_std_ie_err(pc, ret);
{
u_char *p;
if ((p = findie(skb->data, skb->len, IE_FACILITY, 0)))
l3ni1_parse_facility(pc->st, pc, pc->callref, p);
}
}
static void
l3ni1_suspend_req(struct l3_process *pc, u_char pr, void *arg)
{
struct sk_buff *skb;
u_char tmp[32];
u_char *p = tmp;
u_char i, l;
u_char *msg = pc->chan->setup.phone;
MsgHead(p, pc->callref, MT_SUSPEND);
l = *msg++;
if (l && (l <= 10)) { /* Max length 10 octets */
*p++ = IE_CALL_ID;
*p++ = l;
for (i = 0; i < l; i++)
*p++ = *msg++;
} else if (l) {
l3_debug(pc->st, "SUS wrong CALL_ID len %d", l);
return;
}
l = p - tmp;
if (!(skb = l3_alloc_skb(l)))
return;
memcpy(skb_put(skb, l), tmp, l);
l3_msg(pc->st, DL_DATA | REQUEST, skb);
newl3state(pc, 15);
L3AddTimer(&pc->timer, T319, CC_T319);
}
static void
l3ni1_suspend_ack(struct l3_process *pc, u_char pr, void *arg)
{
struct sk_buff *skb = arg;
int ret;
L3DelTimer(&pc->timer);
newl3state(pc, 0);
pc->para.cause = NO_CAUSE;
pc->st->l3.l3l4(pc->st, CC_SUSPEND | CONFIRM, pc);
/* We don't handle suspend_ack for IE errors now */
if ((ret = check_infoelements(pc, skb, ie_SUSPEND_ACKNOWLEDGE)))
if (pc->debug & L3_DEB_WARN)
l3_debug(pc->st, "SUSPACK check ie(%d)", ret);
ni1_release_l3_process(pc);
}
static void
l3ni1_suspend_rej(struct l3_process *pc, u_char pr, void *arg)
{
struct sk_buff *skb = arg;
int ret;
if ((ret = l3ni1_get_cause(pc, skb))) {
if (pc->debug & L3_DEB_WARN)
l3_debug(pc->st, "SUSP_REJ get_cause ret(%d)", ret);
if (ret < 0)
pc->para.cause = 96;
else
pc->para.cause = 100;
l3ni1_status_send(pc, pr, NULL);
return;
}
ret = check_infoelements(pc, skb, ie_SUSPEND_REJECT);
if (ERR_IE_COMPREHENSION == ret) {
l3ni1_std_ie_err(pc, ret);
return;
}
L3DelTimer(&pc->timer);
pc->st->l3.l3l4(pc->st, CC_SUSPEND_ERR, pc);
newl3state(pc, 10);
if (ret) /* STATUS for none mandatory IE errors after actions are taken */
l3ni1_std_ie_err(pc, ret);
}
static void
l3ni1_resume_req(struct l3_process *pc, u_char pr, void *arg)
{
struct sk_buff *skb;
u_char tmp[32];
u_char *p = tmp;
u_char i, l;
u_char *msg = pc->para.setup.phone;
MsgHead(p, pc->callref, MT_RESUME);
l = *msg++;
if (l && (l <= 10)) { /* Max length 10 octets */
*p++ = IE_CALL_ID;
*p++ = l;
for (i = 0; i < l; i++)
*p++ = *msg++;
} else if (l) {
l3_debug(pc->st, "RES wrong CALL_ID len %d", l);
return;
}
l = p - tmp;
if (!(skb = l3_alloc_skb(l)))
return;
memcpy(skb_put(skb, l), tmp, l);
l3_msg(pc->st, DL_DATA | REQUEST, skb);
newl3state(pc, 17);
L3AddTimer(&pc->timer, T318, CC_T318);
}
static void
l3ni1_resume_ack(struct l3_process *pc, u_char pr, void *arg)
{
struct sk_buff *skb = arg;
int id, ret;
if ((id = l3ni1_get_channel_id(pc, skb)) > 0) {
if ((0 == id) || ((3 == id) && (0x10 == pc->para.moderate))) {
if (pc->debug & L3_DEB_WARN)
l3_debug(pc->st, "resume ack with wrong chid %x", id);
pc->para.cause = 100;
l3ni1_status_send(pc, pr, NULL);
return;
}
pc->para.bchannel = id;
} else if (1 == pc->state) {
if (pc->debug & L3_DEB_WARN)
l3_debug(pc->st, "resume ack without chid (ret %d)", id);
pc->para.cause = 96;
l3ni1_status_send(pc, pr, NULL);
return;
}
ret = check_infoelements(pc, skb, ie_RESUME_ACKNOWLEDGE);
if (ERR_IE_COMPREHENSION == ret) {
l3ni1_std_ie_err(pc, ret);
return;
}
L3DelTimer(&pc->timer);
pc->st->l3.l3l4(pc->st, CC_RESUME | CONFIRM, pc);
newl3state(pc, 10);
if (ret) /* STATUS for none mandatory IE errors after actions are taken */
l3ni1_std_ie_err(pc, ret);
}
static void
l3ni1_resume_rej(struct l3_process *pc, u_char pr, void *arg)
{
struct sk_buff *skb = arg;
int ret;
if ((ret = l3ni1_get_cause(pc, skb))) {
if (pc->debug & L3_DEB_WARN)
l3_debug(pc->st, "RES_REJ get_cause ret(%d)", ret);
if (ret < 0)
pc->para.cause = 96;
else
pc->para.cause = 100;
l3ni1_status_send(pc, pr, NULL);
return;
}
ret = check_infoelements(pc, skb, ie_RESUME_REJECT);
if (ERR_IE_COMPREHENSION == ret) {
l3ni1_std_ie_err(pc, ret);
return;
}
L3DelTimer(&pc->timer);
pc->st->l3.l3l4(pc->st, CC_RESUME_ERR, pc);
newl3state(pc, 0);
if (ret) /* STATUS for none mandatory IE errors after actions are taken */
l3ni1_std_ie_err(pc, ret);
ni1_release_l3_process(pc);
}
static void
l3ni1_global_restart(struct l3_process *pc, u_char pr, void *arg)
{
u_char tmp[32];
u_char *p;
u_char ri, ch = 0, chan = 0;
int l;
struct sk_buff *skb = arg;
struct l3_process *up;
newl3state(pc, 2);
L3DelTimer(&pc->timer);
p = skb->data;
if ((p = findie(p, skb->len, IE_RESTART_IND, 0))) {
ri = p[2];
l3_debug(pc->st, "Restart %x", ri);
} else {
l3_debug(pc->st, "Restart without restart IE");
ri = 0x86;
}
p = skb->data;
if ((p = findie(p, skb->len, IE_CHANNEL_ID, 0))) {
chan = p[2] & 3;
ch = p[2];
if (pc->st->l3.debug)
l3_debug(pc->st, "Restart for channel %d", chan);
}
newl3state(pc, 2);
up = pc->st->l3.proc;
while (up) {
if ((ri & 7) == 7)
up->st->lli.l4l3(up->st, CC_RESTART | REQUEST, up);
else if (up->para.bchannel == chan)
up->st->lli.l4l3(up->st, CC_RESTART | REQUEST, up);
up = up->next;
}
p = tmp;
MsgHead(p, pc->callref, MT_RESTART_ACKNOWLEDGE);
if (chan) {
*p++ = IE_CHANNEL_ID;
*p++ = 1;
*p++ = ch | 0x80;
}
*p++ = 0x79; /* RESTART Ind */
*p++ = 1;
*p++ = ri;
l = p - tmp;
if (!(skb = l3_alloc_skb(l)))
return;
memcpy(skb_put(skb, l), tmp, l);
newl3state(pc, 0);
l3_msg(pc->st, DL_DATA | REQUEST, skb);
}
static void
l3ni1_dl_reset(struct l3_process *pc, u_char pr, void *arg)
{
pc->para.cause = 0x29; /* Temporary failure */
pc->para.loc = 0;
l3ni1_disconnect_req(pc, pr, NULL);
pc->st->l3.l3l4(pc->st, CC_SETUP_ERR, pc);
}
static void
l3ni1_dl_release(struct l3_process *pc, u_char pr, void *arg)
{
newl3state(pc, 0);
pc->para.cause = 0x1b; /* Destination out of order */
pc->para.loc = 0;
pc->st->l3.l3l4(pc->st, CC_RELEASE | INDICATION, pc);
release_l3_process(pc);
}
static void
l3ni1_dl_reestablish(struct l3_process *pc, u_char pr, void *arg)
{
L3DelTimer(&pc->timer);
L3AddTimer(&pc->timer, T309, CC_T309);
l3_msg(pc->st, DL_ESTABLISH | REQUEST, NULL);
}
static void
l3ni1_dl_reest_status(struct l3_process *pc, u_char pr, void *arg)
{
L3DelTimer(&pc->timer);
pc->para.cause = 0x1F; /* normal, unspecified */
l3ni1_status_send(pc, 0, NULL);
}
static void l3ni1_SendSpid(struct l3_process *pc, u_char pr, struct sk_buff *skb, int iNewState)
{
u_char *p;
char *pSPID;
struct Channel *pChan = pc->st->lli.userdata;
int l;
if (skb)
dev_kfree_skb(skb);
if (!(pSPID = strchr(pChan->setup.eazmsn, ':')))
{
printk(KERN_ERR "SPID not supplied in EAZMSN %s\n", pChan->setup.eazmsn);
newl3state(pc, 0);
pc->st->l3.l3l2(pc->st, DL_RELEASE | REQUEST, NULL);
return;
}
l = strlen(++pSPID);
if (!(skb = l3_alloc_skb(5 + l)))
{
printk(KERN_ERR "HiSax can't get memory to send SPID\n");
return;
}
p = skb_put(skb, 5);
*p++ = PROTO_DIS_EURO;
*p++ = 0;
*p++ = MT_INFORMATION;
*p++ = IE_SPID;
*p++ = l;
memcpy(skb_put(skb, l), pSPID, l);
newl3state(pc, iNewState);
L3DelTimer(&pc->timer);
L3AddTimer(&pc->timer, TSPID, CC_TSPID);
pc->st->l3.l3l2(pc->st, DL_DATA | REQUEST, skb);
}
static void l3ni1_spid_send(struct l3_process *pc, u_char pr, void *arg)
{
l3ni1_SendSpid(pc, pr, arg, 20);
}
static void l3ni1_spid_epid(struct l3_process *pc, u_char pr, void *arg)
{
struct sk_buff *skb = arg;
if (skb->data[1] == 0)
if (skb->data[3] == IE_ENDPOINT_ID)
{
L3DelTimer(&pc->timer);
newl3state(pc, 0);
l3_msg(pc->st, DL_ESTABLISH | CONFIRM, NULL);
}
dev_kfree_skb(skb);
}
static void l3ni1_spid_tout(struct l3_process *pc, u_char pr, void *arg)
{
if (pc->state < 22)
l3ni1_SendSpid(pc, pr, arg, pc->state + 1);
else
{
L3DelTimer(&pc->timer);
dev_kfree_skb(arg);
printk(KERN_ERR "SPID not accepted\n");
newl3state(pc, 0);
pc->st->l3.l3l2(pc->st, DL_RELEASE | REQUEST, NULL);
}
}
/* *INDENT-OFF* */
static struct stateentry downstatelist[] =
{
{SBIT(0),
CC_SETUP | REQUEST, l3ni1_setup_req},
{SBIT(0),
CC_RESUME | REQUEST, l3ni1_resume_req},
{SBIT(1) | SBIT(2) | SBIT(3) | SBIT(4) | SBIT(6) | SBIT(7) | SBIT(8) | SBIT(9) | SBIT(10) | SBIT(25),
CC_DISCONNECT | REQUEST, l3ni1_disconnect_req},
{SBIT(12),
CC_RELEASE | REQUEST, l3ni1_release_req},
{ALL_STATES,
CC_RESTART | REQUEST, l3ni1_restart},
{SBIT(6) | SBIT(25),
CC_IGNORE | REQUEST, l3ni1_reset},
{SBIT(6) | SBIT(25),
CC_REJECT | REQUEST, l3ni1_reject_req},
{SBIT(6) | SBIT(25),
CC_PROCEED_SEND | REQUEST, l3ni1_proceed_req},
{SBIT(6),
CC_MORE_INFO | REQUEST, l3ni1_setup_ack_req},
{SBIT(25),
CC_MORE_INFO | REQUEST, l3ni1_dummy},
{SBIT(6) | SBIT(9) | SBIT(25),
CC_ALERTING | REQUEST, l3ni1_alert_req},
{SBIT(6) | SBIT(7) | SBIT(9) | SBIT(25),
CC_SETUP | RESPONSE, l3ni1_setup_rsp},
{SBIT(10),
CC_SUSPEND | REQUEST, l3ni1_suspend_req},
{SBIT(7) | SBIT(9) | SBIT(25),
CC_REDIR | REQUEST, l3ni1_redir_req},
{SBIT(6),
CC_REDIR | REQUEST, l3ni1_redir_req_early},
{SBIT(9) | SBIT(25),
CC_DISCONNECT | REQUEST, l3ni1_disconnect_req},
{SBIT(25),
CC_T302, l3ni1_t302},
{SBIT(1),
CC_T303, l3ni1_t303},
{SBIT(2),
CC_T304, l3ni1_t304},
{SBIT(3),
CC_T310, l3ni1_t310},
{SBIT(8),
CC_T313, l3ni1_t313},
{SBIT(11),
CC_T305, l3ni1_t305},
{SBIT(15),
CC_T319, l3ni1_t319},
{SBIT(17),
CC_T318, l3ni1_t318},
{SBIT(19),
CC_T308_1, l3ni1_t308_1},
{SBIT(19),
CC_T308_2, l3ni1_t308_2},
{SBIT(10),
CC_T309, l3ni1_dl_release},
{ SBIT(20) | SBIT(21) | SBIT(22),
CC_TSPID, l3ni1_spid_tout },
};
static struct stateentry datastatelist[] =
{
{ALL_STATES,
MT_STATUS_ENQUIRY, l3ni1_status_enq},
{ALL_STATES,
MT_FACILITY, l3ni1_facility},
{SBIT(19),
MT_STATUS, l3ni1_release_ind},
{ALL_STATES,
MT_STATUS, l3ni1_status},
{SBIT(0),
MT_SETUP, l3ni1_setup},
{SBIT(6) | SBIT(7) | SBIT(8) | SBIT(9) | SBIT(10) | SBIT(11) | SBIT(12) |
SBIT(15) | SBIT(17) | SBIT(19) | SBIT(25),
MT_SETUP, l3ni1_dummy},
{SBIT(1) | SBIT(2),
MT_CALL_PROCEEDING, l3ni1_call_proc},
{SBIT(1),
MT_SETUP_ACKNOWLEDGE, l3ni1_setup_ack},
{SBIT(2) | SBIT(3),
MT_ALERTING, l3ni1_alerting},
{SBIT(2) | SBIT(3),
MT_PROGRESS, l3ni1_progress},
{SBIT(2) | SBIT(3) | SBIT(4) | SBIT(7) | SBIT(8) | SBIT(9) | SBIT(10) |
SBIT(11) | SBIT(12) | SBIT(15) | SBIT(17) | SBIT(19) | SBIT(25),
MT_INFORMATION, l3ni1_information},
{SBIT(10) | SBIT(11) | SBIT(15),
MT_NOTIFY, l3ni1_notify},
{SBIT(0) | SBIT(1) | SBIT(2) | SBIT(3) | SBIT(4) | SBIT(7) | SBIT(8) | SBIT(10) |
SBIT(11) | SBIT(12) | SBIT(15) | SBIT(17) | SBIT(19) | SBIT(25),
MT_RELEASE_COMPLETE, l3ni1_release_cmpl},
{SBIT(1) | SBIT(2) | SBIT(3) | SBIT(4) | SBIT(7) | SBIT(8) | SBIT(9) | SBIT(10) | SBIT(11) | SBIT(12) | SBIT(15) | SBIT(17) | SBIT(25),
MT_RELEASE, l3ni1_release},
{SBIT(19), MT_RELEASE, l3ni1_release_ind},
{SBIT(1) | SBIT(2) | SBIT(3) | SBIT(4) | SBIT(7) | SBIT(8) | SBIT(9) | SBIT(10) | SBIT(11) | SBIT(15) | SBIT(17) | SBIT(25),
MT_DISCONNECT, l3ni1_disconnect},
{SBIT(19),
MT_DISCONNECT, l3ni1_dummy},
{SBIT(1) | SBIT(2) | SBIT(3) | SBIT(4),
MT_CONNECT, l3ni1_connect},
{SBIT(8),
MT_CONNECT_ACKNOWLEDGE, l3ni1_connect_ack},
{SBIT(15),
MT_SUSPEND_ACKNOWLEDGE, l3ni1_suspend_ack},
{SBIT(15),
MT_SUSPEND_REJECT, l3ni1_suspend_rej},
{SBIT(17),
MT_RESUME_ACKNOWLEDGE, l3ni1_resume_ack},
{SBIT(17),
MT_RESUME_REJECT, l3ni1_resume_rej},
};
static struct stateentry globalmes_list[] =
{
{ALL_STATES,
MT_STATUS, l3ni1_status},
{SBIT(0),
MT_RESTART, l3ni1_global_restart},
/* {SBIT(1),
MT_RESTART_ACKNOWLEDGE, l3ni1_restart_ack},
*/
{ SBIT(0), MT_DL_ESTABLISHED, l3ni1_spid_send },
{ SBIT(20) | SBIT(21) | SBIT(22), MT_INFORMATION, l3ni1_spid_epid },
};
static struct stateentry manstatelist[] =
{
{SBIT(2),
DL_ESTABLISH | INDICATION, l3ni1_dl_reset},
{SBIT(10),
DL_ESTABLISH | CONFIRM, l3ni1_dl_reest_status},
{SBIT(10),
DL_RELEASE | INDICATION, l3ni1_dl_reestablish},
{ALL_STATES,
DL_RELEASE | INDICATION, l3ni1_dl_release},
};
/* *INDENT-ON* */
static void
global_handler(struct PStack *st, int mt, struct sk_buff *skb)
{
u_char tmp[16];
u_char *p = tmp;
int l;
int i;
struct l3_process *proc = st->l3.global;
if (skb)
proc->callref = skb->data[2]; /* cr flag */
else
proc->callref = 0;
for (i = 0; i < ARRAY_SIZE(globalmes_list); i++)
if ((mt == globalmes_list[i].primitive) &&
((1 << proc->state) & globalmes_list[i].state))
break;
if (i == ARRAY_SIZE(globalmes_list)) {
if (st->l3.debug & L3_DEB_STATE) {
l3_debug(st, "ni1 global state %d mt %x unhandled",
proc->state, mt);
}
MsgHead(p, proc->callref, MT_STATUS);
*p++ = IE_CAUSE;
*p++ = 0x2;
*p++ = 0x80;
*p++ = 81 | 0x80; /* invalid cr */
*p++ = 0x14; /* CallState */
*p++ = 0x1;
*p++ = proc->state & 0x3f;
l = p - tmp;
if (!(skb = l3_alloc_skb(l)))
return;
memcpy(skb_put(skb, l), tmp, l);
l3_msg(proc->st, DL_DATA | REQUEST, skb);
} else {
if (st->l3.debug & L3_DEB_STATE) {
l3_debug(st, "ni1 global %d mt %x",
proc->state, mt);
}
globalmes_list[i].rout(proc, mt, skb);
}
}
static void
ni1up(struct PStack *st, int pr, void *arg)
{
int i, mt, cr, callState;
char *ptr;
u_char *p;
struct sk_buff *skb = arg;
struct l3_process *proc;
switch (pr) {
case (DL_DATA | INDICATION):
case (DL_UNIT_DATA | INDICATION):
break;
case (DL_ESTABLISH | INDICATION):
case (DL_RELEASE | INDICATION):
case (DL_RELEASE | CONFIRM):
l3_msg(st, pr, arg);
return;
break;
case (DL_ESTABLISH | CONFIRM):
global_handler(st, MT_DL_ESTABLISHED, NULL);
return;
default:
printk(KERN_ERR "HiSax ni1up unknown pr=%04x\n", pr);
return;
}
if (skb->len < 3) {
l3_debug(st, "ni1up frame too short(%d)", skb->len);
dev_kfree_skb(skb);
return;
}
if (skb->data[0] != PROTO_DIS_EURO) {
if (st->l3.debug & L3_DEB_PROTERR) {
l3_debug(st, "ni1up%sunexpected discriminator %x message len %d",
(pr == (DL_DATA | INDICATION)) ? " " : "(broadcast) ",
skb->data[0], skb->len);
}
dev_kfree_skb(skb);
return;
}
cr = getcallref(skb->data);
if (skb->len < ((skb->data[1] & 0x0f) + 3)) {
l3_debug(st, "ni1up frame too short(%d)", skb->len);
dev_kfree_skb(skb);
return;
}
mt = skb->data[skb->data[1] + 2];
if (st->l3.debug & L3_DEB_STATE)
l3_debug(st, "ni1up cr %d", cr);
if (cr == -2) { /* wrong Callref */
if (st->l3.debug & L3_DEB_WARN)
l3_debug(st, "ni1up wrong Callref");
dev_kfree_skb(skb);
return;
} else if (cr == -1) { /* Dummy Callref */
if (mt == MT_FACILITY)
{
if ((p = findie(skb->data, skb->len, IE_FACILITY, 0))) {
l3ni1_parse_facility(st, NULL,
(pr == (DL_DATA | INDICATION)) ? -1 : -2, p);
dev_kfree_skb(skb);
return;
}
}
else
{
global_handler(st, mt, skb);
return;
}
if (st->l3.debug & L3_DEB_WARN)
l3_debug(st, "ni1up dummy Callref (no facility msg or ie)");
dev_kfree_skb(skb);
return;
} else if ((((skb->data[1] & 0x0f) == 1) && (0 == (cr & 0x7f))) ||
(((skb->data[1] & 0x0f) == 2) && (0 == (cr & 0x7fff)))) { /* Global CallRef */
if (st->l3.debug & L3_DEB_STATE)
l3_debug(st, "ni1up Global CallRef");
global_handler(st, mt, skb);
dev_kfree_skb(skb);
return;
} else if (!(proc = getl3proc(st, cr))) {
/* No transaction process exist, that means no call with
* this callreference is active
*/
if (mt == MT_SETUP) {
/* Setup creates a new transaction process */
if (skb->data[2] & 0x80) {
/* Setup with wrong CREF flag */
if (st->l3.debug & L3_DEB_STATE)
l3_debug(st, "ni1up wrong CRef flag");
dev_kfree_skb(skb);
return;
}
if (!(proc = ni1_new_l3_process(st, cr))) {
/* May be to answer with RELEASE_COMPLETE and
* CAUSE 0x2f "Resource unavailable", but this
* need a new_l3_process too ... arghh
*/
dev_kfree_skb(skb);
return;
}
} else if (mt == MT_STATUS) {
if ((ptr = findie(skb->data, skb->len, IE_CAUSE, 0)) != NULL) {
ptr++;
if (*ptr++ == 2)
ptr++;
}
callState = 0;
if ((ptr = findie(skb->data, skb->len, IE_CALL_STATE, 0)) != NULL) {
ptr++;
if (*ptr++ == 2)
ptr++;
callState = *ptr;
}
/* ETS 300-104 part 2.4.1
* if setup has not been made and a message type
* MT_STATUS is received with call state == 0,
* we must send nothing
*/
if (callState != 0) {
/* ETS 300-104 part 2.4.2
* if setup has not been made and a message type
* MT_STATUS is received with call state != 0,
* we must send MT_RELEASE_COMPLETE cause 101
*/
if ((proc = ni1_new_l3_process(st, cr))) {
proc->para.cause = 101;
l3ni1_msg_without_setup(proc, 0, NULL);
}
}
dev_kfree_skb(skb);
return;
} else if (mt == MT_RELEASE_COMPLETE) {
dev_kfree_skb(skb);
return;
} else {
/* ETS 300-104 part 2
* if setup has not been made and a message type
* (except MT_SETUP and RELEASE_COMPLETE) is received,
* we must send MT_RELEASE_COMPLETE cause 81 */
dev_kfree_skb(skb);
if ((proc = ni1_new_l3_process(st, cr))) {
proc->para.cause = 81;
l3ni1_msg_without_setup(proc, 0, NULL);
}
return;
}
}
if (l3ni1_check_messagetype_validity(proc, mt, skb)) {
dev_kfree_skb(skb);
return;
}
if ((p = findie(skb->data, skb->len, IE_DISPLAY, 0)) != NULL)
l3ni1_deliver_display(proc, pr, p); /* Display IE included */
for (i = 0; i < ARRAY_SIZE(datastatelist); i++)
if ((mt == datastatelist[i].primitive) &&
((1 << proc->state) & datastatelist[i].state))
break;
if (i == ARRAY_SIZE(datastatelist)) {
if (st->l3.debug & L3_DEB_STATE) {
l3_debug(st, "ni1up%sstate %d mt %#x unhandled",
(pr == (DL_DATA | INDICATION)) ? " " : "(broadcast) ",
proc->state, mt);
}
if ((MT_RELEASE_COMPLETE != mt) && (MT_RELEASE != mt)) {
proc->para.cause = 101;
l3ni1_status_send(proc, pr, skb);
}
} else {
if (st->l3.debug & L3_DEB_STATE) {
l3_debug(st, "ni1up%sstate %d mt %x",
(pr == (DL_DATA | INDICATION)) ? " " : "(broadcast) ",
proc->state, mt);
}
datastatelist[i].rout(proc, pr, skb);
}
dev_kfree_skb(skb);
return;
}
static void
ni1down(struct PStack *st, int pr, void *arg)
{
int i, cr;
struct l3_process *proc;
struct Channel *chan;
if ((DL_ESTABLISH | REQUEST) == pr) {
l3_msg(st, pr, NULL);
return;
} else if (((CC_SETUP | REQUEST) == pr) || ((CC_RESUME | REQUEST) == pr)) {
chan = arg;
cr = newcallref();
cr |= 0x80;
if ((proc = ni1_new_l3_process(st, cr))) {
proc->chan = chan;
chan->proc = proc;
memcpy(&proc->para.setup, &chan->setup, sizeof(setup_parm));
proc->callref = cr;
}
} else {
proc = arg;
}
if (!proc) {
printk(KERN_ERR "HiSax ni1down without proc pr=%04x\n", pr);
return;
}
if (pr == (CC_TNI1_IO | REQUEST)) {
l3ni1_io_timer(proc); /* timer expires */
return;
}
for (i = 0; i < ARRAY_SIZE(downstatelist); i++)
if ((pr == downstatelist[i].primitive) &&
((1 << proc->state) & downstatelist[i].state))
break;
if (i == ARRAY_SIZE(downstatelist)) {
if (st->l3.debug & L3_DEB_STATE) {
l3_debug(st, "ni1down state %d prim %#x unhandled",
proc->state, pr);
}
} else {
if (st->l3.debug & L3_DEB_STATE) {
l3_debug(st, "ni1down state %d prim %#x",
proc->state, pr);
}
downstatelist[i].rout(proc, pr, arg);
}
}
static void
ni1man(struct PStack *st, int pr, void *arg)
{
int i;
struct l3_process *proc = arg;
if (!proc) {
printk(KERN_ERR "HiSax ni1man without proc pr=%04x\n", pr);
return;
}
for (i = 0; i < ARRAY_SIZE(manstatelist); i++)
if ((pr == manstatelist[i].primitive) &&
((1 << proc->state) & manstatelist[i].state))
break;
if (i == ARRAY_SIZE(manstatelist)) {
if (st->l3.debug & L3_DEB_STATE) {
l3_debug(st, "cr %d ni1man state %d prim %#x unhandled",
proc->callref & 0x7f, proc->state, pr);
}
} else {
if (st->l3.debug & L3_DEB_STATE) {
l3_debug(st, "cr %d ni1man state %d prim %#x",
proc->callref & 0x7f, proc->state, pr);
}
manstatelist[i].rout(proc, pr, arg);
}
}
void
setstack_ni1(struct PStack *st)
{
char tmp[64];
int i;
st->lli.l4l3 = ni1down;
st->lli.l4l3_proto = l3ni1_cmd_global;
st->l2.l2l3 = ni1up;
st->l3.l3ml3 = ni1man;
st->l3.N303 = 1;
st->prot.ni1.last_invoke_id = 0;
st->prot.ni1.invoke_used[0] = 1; /* Bit 0 must always be set to 1 */
i = 1;
while (i < 32)
st->prot.ni1.invoke_used[i++] = 0;
if (!(st->l3.global = kmalloc(sizeof(struct l3_process), GFP_ATOMIC))) {
printk(KERN_ERR "HiSax can't get memory for ni1 global CR\n");
} else {
st->l3.global->state = 0;
st->l3.global->callref = 0;
st->l3.global->next = NULL;
st->l3.global->debug = L3_DEB_WARN;
st->l3.global->st = st;
st->l3.global->N303 = 1;
st->l3.global->prot.ni1.invoke_id = 0;
L3InitTimer(st->l3.global, &st->l3.global->timer);
}
strcpy(tmp, ni1_revision);
printk(KERN_INFO "HiSax: National ISDN-1 Rev. %s\n", HiSax_getrev(tmp));
}
Reference in New Issue View Git Blame Copy Permalink