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mISDN/drivers/isdn/hardware/mISDN/l3_udss1.c

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v0.1
2001-02-11 22:46:19 +00:00
/* $Id$
*
* EURO/DSS1 D-channel protocol
*
* Author Karsten Keil (keil@isdn4linux.de)
*
* This file is (c) under GNU PUBLIC LICENSE
* For changes and modifications please read
* ../../../Documentation/isdn/HiSax.cert
*
* Thanks to Jan den Ouden
* Fritz Elfert
*
*/
#include <linux/module.h>
#include "hisax.h"
#include "hisaxl3.h"
#include "dss1.h"
static layer3_t *dss1list = NULL;
static int debug = 0;
static hisaxobject_t u_dss1;
extern char *HiSax_getrev(const char *revision);
const char *dss1_revision = "$Revision$";
#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
static void
l3dss1_message(l3_process_t *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->l3, DL_DATA | REQUEST, skb);
}
static void
l3dss1_message_cause(l3_process_t *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 | CAUSE_LOC_USER;
*p++ = cause | 0x80;
l = p - tmp;
if (!(skb = l3_alloc_skb(l)))
return;
memcpy(skb_put(skb, l), tmp, l);
l3_msg(pc->l3, DL_DATA | REQUEST, skb);
}
static void
l3dss1_status_send(l3_process_t *pc, u_char loc, u_char cause)
{
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++ = loc | 0x80;
*p++ = 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->l3, DL_DATA | REQUEST, skb);
}
static void
l3dss1_msg_without_setup(l3_process_t *pc, u_char loc, u_char cause)
{
/* This routine is called if here was no SETUP made (checks in dss1up and in
* l3dss1_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 (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++ = loc | 0x80;
*p++ = cause | 0x80;
break;
default:
printk(KERN_ERR "HiSax l3dss1_msg_without_setup wrong cause %d\n",
cause);
return;
}
l = p - tmp;
if (!(skb = l3_alloc_skb(l)))
return;
memcpy(skb_put(skb, l), tmp, l);
l3_msg(pc->l3, DL_DATA | REQUEST, skb);
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(l3_process_t *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(l3_process_t *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->l3, "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->l3, "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->l3, "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
l3dss1_check_messagetype_validity(l3_process_t *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->l3, "l3dss1_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->l3, "l3dss1_check_messagetype_validity mt(%x) fail", mt);
l3dss1_status_send(pc, CAUSE_LOC_USER, CAUSE_MT_NOTIMPLEMENTED);
return(1);
}
return(0);
}
static void
l3dss1_std_ie_err(l3_process_t *pc, int ret) {
if (pc->debug & L3_DEB_CHECK)
l3_debug(pc->l3, "check_infoelements ret %d", ret);
switch(ret) {
case 0:
break;
case ERR_IE_COMPREHENSION:
l3dss1_status_send(pc, CAUSE_LOC_USER, CAUSE_MANDATORY_IE_MISS);
break;
case ERR_IE_UNRECOGNIZED:
l3dss1_status_send(pc, CAUSE_LOC_USER, CAUSE_IE_NOTIMPLEMENTED);
break;
case ERR_IE_LENGTH:
l3dss1_status_send(pc, CAUSE_LOC_USER, CAUSE_INVALID_CONTENTS);
break;
case ERR_IE_SEQUENCE:
default:
break;
}
}
static int
l3dss1_get_channel_id(l3_process_t *pc, struct sk_buff *skb, channel_t *chid) {
u_char *p, *sp;
if ((p = findie(skb->data, skb->len, IE_CHANNEL_ID, 0))) {
p++;
sp = p;
if (*p != 1) { /* len for BRI = 1 */
if (pc->debug & L3_DEB_WARN)
l3_debug(pc->l3, "wrong chid len %d", *p);
return (-2);
}
p++;
if (*p & 0x60) { /* only base rate interface */
if (pc->debug & L3_DEB_WARN)
l3_debug(pc->l3, "wrong chid %x", *p);
return (-3);
}
memcpy(chid, sp, *sp);
return(chid->chan & 0x3);
} else
return(-1);
}
static int
l3dss1_get_cause(l3_process_t *pc, struct sk_buff *skb) {
u_char l, i=0;
u_char *p;
memset(&pc->para.cause, 0, sizeof(cause_t));
pc->para.cause.val = CAUSE_NORMALUNSPECIFIED;
if ((p = findie(skb->data, skb->len, IE_CAUSE, 0))) {
p++;
l = *p++;
if (l>30)
return(1);
pc->para.cause.len = l;
if (l) {
pc->para.cause.loc = *p++;
l--;
} else {
return(2);
}
if (l && !(pc->para.cause.loc & 0x80)) {
l--;
pc->para.cause.rec = *p++; /* skip recommendation */
}
if (l) {
pc->para.cause.val = *p++;
l--;
if (!(pc->para.cause.val & 0x80))
return(3);
} else
return(4);
while (l && (i<28)) {
pc->para.cause.diag[i++] = *p++;
l--;
}
} else
return(-1);
return(0);
}
#if 0
static void
l3dss1_msg_with_uus(l3_process_t *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.dss1.uus1_data[0])
{ *p++ = IE_USER_USER; /* UUS info element */
*p++ = strlen(pc->prot.dss1.uus1_data) + 1;
*p++ = 0x04; /* IA5 chars */
strcpy(p,pc->prot.dss1.uus1_data);
p += strlen(pc->prot.dss1.uus1_data);
pc->prot.dss1.uus1_data[0] = '\0';
}
l = p - tmp;
if (!(skb = l3_alloc_skb(l)))
return;
memcpy(skb_put(skb, l), tmp, l);
l3_msg(pc->l3, DL_DATA | REQUEST, skb);
}
#endif
static void
l3dss1_release_req(l3_process_t *pc, u_char pr, void *arg)
{
StopAllL3Timer(pc);
newl3state(pc, 19);
// if (!pc->prot.dss1.uus1_data[0])
l3dss1_message(pc, MT_RELEASE);
// else
// l3dss1_msg_with_uus(pc, MT_RELEASE);
L3AddTimer(&pc->timer, T308, CC_T308_1);
}
static void
l3dss1_release_cmpl(l3_process_t *pc, u_char pr, void *arg)
{
struct sk_buff *skb = arg;
int ret;
u_char cause;
if ((ret = l3dss1_get_cause(pc, skb))>0) {
if (pc->debug & L3_DEB_WARN)
l3_debug(pc->l3, "RELCMPL get_cause ret(%d)",ret);
} else if (ret < 0)
cause = NO_CAUSE;
StopAllL3Timer(pc);
newl3state(pc, 0);
hisax_l3up(pc, CC_RELEASE | CONFIRM, pc);
release_l3_process(pc);
}
static void
l3dss1_setup_req(l3_process_t *pc, u_char pr, void *arg)
{
setup_t *setup = arg;
struct sk_buff *skb;
u_char tmp[128];
u_char *p = tmp;
u_char *sp;
int l;
MsgHead(p, pc->callref, MT_SETUP);
if (setup->sending_cmpl)
*p++ = 0xa1; /* complete indicator */
*p++ = IE_BEARER;
sp = &setup->bc[0];
l = *sp;
*p++ = *sp++;
while(l)
*p++ = *sp++;
sp = &setup->channel.len;
if (*sp) {
*p++ = IE_CHANNEL_ID;
l = *sp;
*p++ = *sp++;
while(l)
*p++ = *sp++;
}
sp = &setup->calling_nr[0];
if (*sp) {
*p++ = IE_CALLING_PN;
l = *sp;
*p++ = *sp++;
while(l)
*p++ = *sp++;
}
sp = &setup->calling_sub[0];
if (*sp) {
*p++ = IE_CALLING_SUB;
l = *sp;
*p++ = *sp++;
while(l)
*p++ = *sp++;
}
sp = &setup->called_nr[0];
if (*sp) {
*p++ = IE_CALLED_PN;
l = *sp;
*p++ = *sp++;
while(l)
*p++ = *sp++;
}
sp = &setup->called_sub[0];
if (*sp) {
*p++ = IE_CALLED_SUB;
l = *sp;
*p++ = *sp++;
while(l)
*p++ = *sp++;
}
sp = &setup->llc[0];
if (*sp) {
*p++ = IE_LLC;
l = *sp;
*p++ = *sp++;
while(l)
*p++ = *sp++;
}
sp = &setup->hlc[0];
if (*sp) {
*p++ = IE_HLC;
l = *sp;
*p++ = *sp++;
while(l)
*p++ = *sp++;
}
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->l3, DL_DATA | REQUEST, skb);
}
static void
l3dss1_call_proc(l3_process_t *pc, u_char pr, void *arg)
{
struct sk_buff *skb = arg;
int id, ret;
u_char cause;
if ((id = l3dss1_get_channel_id(pc, skb, &pc->para.channel)) >= 0) {
if ((0 == id) || (3 == id)) {
if (pc->debug & L3_DEB_WARN)
l3_debug(pc->l3, "setup answer with wrong chid %x", id);
l3dss1_status_send(pc, CAUSE_LOC_USER, CAUSE_INVALID_CONTENTS);
return;
}
} else if (1 == pc->state) {
if (pc->debug & L3_DEB_WARN)
l3_debug(pc->l3, "setup answer wrong chid (ret %d)", id);
if (id == -1)
cause = CAUSE_MANDATORY_IE_MISS;
else
cause = CAUSE_INVALID_CONTENTS;
l3dss1_status_send(pc, CAUSE_LOC_USER, cause);
return;
}
/* Now we are on none mandatory IEs */
ret = check_infoelements(pc, skb, ie_CALL_PROCEEDING);
if (ERR_IE_COMPREHENSION == ret) {
l3dss1_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 */
l3dss1_std_ie_err(pc, ret);
hisax_l3up(pc, CC_PROCEEDING | INDICATION, pc);
}
static void
l3dss1_setup_ack(l3_process_t *pc, u_char pr, void *arg)
{
struct sk_buff *skb = arg;
int id, ret;
u_char cause;
if ((id = l3dss1_get_channel_id(pc, skb, &pc->para.channel)) >= 0) {
if ((0 == id) || (3 == id)) {
if (pc->debug & L3_DEB_WARN)
l3_debug(pc->l3, "setup answer with wrong chid %x", id);
l3dss1_status_send(pc, CAUSE_LOC_USER, CAUSE_INVALID_CONTENTS);
return;
}
} else {
if (pc->debug & L3_DEB_WARN)
l3_debug(pc->l3, "setup answer wrong chid (ret %d)", id);
if (id == -1)
cause = CAUSE_MANDATORY_IE_MISS;
else
cause = CAUSE_INVALID_CONTENTS;
l3dss1_status_send(pc, CAUSE_LOC_USER, cause);
return;
}
/* Now we are on none mandatory IEs */
ret = check_infoelements(pc, skb, ie_SETUP_ACKNOWLEDGE);
if (ERR_IE_COMPREHENSION == ret) {
l3dss1_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 */
l3dss1_std_ie_err(pc, ret);
hisax_l3up(pc, CC_MORE_INFO | INDICATION, pc);
}
static void
l3dss1_disconnect(l3_process_t *pc, u_char pr, void *arg)
{
struct sk_buff *skb = arg;
int ret;
u_char cause = 0;
StopAllL3Timer(pc);
if ((ret = l3dss1_get_cause(pc, skb))) {
if (pc->debug & L3_DEB_WARN)
l3_debug(pc->l3, "DISC get_cause ret(%d)", ret);
if (ret < 0)
cause = CAUSE_MANDATORY_IE_MISS;
else if (ret > 0)
cause = CAUSE_INVALID_CONTENTS;
}
#if 0
{
u_char *p;
if ((p = findie(skb->data, skb->len, IE_FACILITY, 0)))
l3dss1_parse_facility(pc->l3, pc, pc->callref, p);
}
#endif
ret = check_infoelements(pc, skb, ie_DISCONNECT);
if (ERR_IE_COMPREHENSION == ret)
cause = CAUSE_MANDATORY_IE_MISS;
else if ((!cause) && (ERR_IE_UNRECOGNIZED == ret))
cause = CAUSE_IE_NOTIMPLEMENTED;
ret = pc->state;
newl3state(pc, 12);
if (cause)
newl3state(pc, 19);
if (11 != ret)
hisax_l3up(pc, CC_DISCONNECT | INDICATION, pc);
else if (!cause)
l3dss1_release_req(pc, pr, NULL);
if (cause) {
l3dss1_message_cause(pc, MT_RELEASE, cause);
L3AddTimer(&pc->timer, T308, CC_T308_1);
}
}
static void
l3dss1_connect(l3_process_t *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) {
l3dss1_std_ie_err(pc, ret);
return;
}
L3DelTimer(&pc->timer); /* T310 */
newl3state(pc, 10);
/* here should inserted COLP handling KKe */
if (ret)
l3dss1_std_ie_err(pc, ret);
hisax_l3up(pc, CC_SETUP | CONFIRM, pc);
}
static void
l3dss1_alerting(l3_process_t *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) {
l3dss1_std_ie_err(pc, ret);
return;
}
L3DelTimer(&pc->timer); /* T304 */
newl3state(pc, 4);
if (ret)
l3dss1_std_ie_err(pc, ret);
hisax_l3up(pc, CC_ALERTING | INDICATION, pc);
}
static void
l3dss1_setup(l3_process_t *pc, u_char pr, void *arg)
{
u_char *p, cause;
int bcfound = 0;
struct sk_buff *skb = arg;
int id;
int err = 0;
/*
* Bearer Capabilities
*/
/* only the first occurence 'll be detected ! */
if ((p = findie(skb->data, skb->len, IE_BEARER, 0))) {
if ((p[1] < 2) || (p[1] > 11))
err = 1;
else {
switch (p[2] & 0x7f) {
case 0x00: /* Speech */
case 0x10: /* 3.1 Khz audio */
case 0x08: /* Unrestricted digital information */
case 0x09: /* Restricted digital information */
case 0x11:
/* Unrestr. digital information with
* tones/announcements ( or 7 kHz audio
*/
case 0x18: /* Video */
break;
default:
err = 2;
break;
}
switch (p[3] & 0x7f) {
case 0x40: /* packed mode */
case 0x10: /* 64 kbit */
case 0x11: /* 2*64 kbit */
case 0x13: /* 384 kbit */
case 0x15: /* 1536 kbit */
case 0x17: /* 1920 kbit */
break;
default:
err = 3;
break;
}
}
if (err) {
if (pc->debug & L3_DEB_WARN)
l3_debug(pc->l3, "setup with wrong bearer(l=%d:%x,%x)",
p[1], p[2], p[3]);
l3dss1_msg_without_setup(pc, CAUSE_LOC_USER, CAUSE_INVALID_CONTENTS);
return;
} else {
memcpy(&pc->para.setup.bc, &p[1], p[1]);
}
} else {
if (pc->debug & L3_DEB_WARN)
l3_debug(pc->l3, "setup without bearer capabilities");
/* ETS 300-104 1.3.3 */
l3dss1_msg_without_setup(pc, CAUSE_LOC_USER, CAUSE_MANDATORY_IE_MISS);
return;
}
/*
* Channel Identification
*/
if ((id = l3dss1_get_channel_id(pc, skb, &pc->para.setup.channel)) >= 0) {
if (id) {
if ((3 == id) && (0x10 == (pc->para.setup.bc[3] & 0x7f))) {
if (pc->debug & L3_DEB_WARN)
l3_debug(pc->l3, "setup with wrong chid %x",
id);
l3dss1_msg_without_setup(pc, CAUSE_LOC_USER,
CAUSE_INVALID_CONTENTS);
return;
}
bcfound++;
} else {
if (pc->debug & L3_DEB_WARN)
l3_debug(pc->l3, "setup without bchannel, call waiting");
bcfound++;
}
} else {
if (pc->debug & L3_DEB_WARN)
l3_debug(pc->l3, "setup with wrong chid ret %d", id);
if (id == -1)
cause = CAUSE_MANDATORY_IE_MISS;
else
cause = CAUSE_INVALID_CONTENTS;
l3dss1_msg_without_setup(pc, CAUSE_LOC_USER, cause);
return;
}
/* Now we are on none mandatory IEs */
err = check_infoelements(pc, skb, ie_SETUP);
if (ERR_IE_COMPREHENSION == err) {
l3dss1_msg_without_setup(pc, CAUSE_LOC_USER, CAUSE_MANDATORY_IE_MISS);
return;
}
if ((p = findie(skb->data, skb->len, IE_COMPLETE, 0)))
pc->para.setup.sending_cmpl = *p;
else
pc->para.setup.sending_cmpl = 0;
if ((p = findie(skb->data, skb->len, IE_CALLED_PN, 0))) {
p++;
memcpy(&pc->para.setup.called_nr[0], p, *p);
} else
pc->para.setup.called_nr[0] = 0;
if ((p = findie(skb->data, skb->len, IE_CALLED_SUB, 0))) {
p++;
memcpy(&pc->para.setup.called_sub[0], p, *p);
} else
pc->para.setup.called_sub[0] = 0;
if ((p = findie(skb->data, skb->len, IE_CALLING_PN, 0))) {
p++;
memcpy(&pc->para.setup.calling_nr[0], p, *p);
} else
pc->para.setup.calling_nr[0] = 0;
if ((p = findie(skb->data, skb->len, IE_CALLING_SUB, 0))) {
p++;
memcpy(&pc->para.setup.calling_sub[0], p, *p);
} else
pc->para.setup.calling_sub[0] = 0;
if ((p = findie(skb->data, skb->len, IE_LLC, 0))) {
p++;
memcpy(&pc->para.setup.llc[0], p, *p);
} else
pc->para.setup.llc[0] = 0;
if ((p = findie(skb->data, skb->len, IE_HLC, 0))) {
p++;
memcpy(&pc->para.setup.hlc[0], p, *p);
} else
pc->para.setup.hlc[0] = 0;
newl3state(pc, 6);
if (err) /* STATUS for none mandatory IE errors after actions are taken */
l3dss1_std_ie_err(pc, err);
hisax_l3up(pc, CC_SETUP | INDICATION, pc);
}
static void
l3dss1_reset(l3_process_t *pc, u_char pr, void *arg)
{
release_l3_process(pc);
}
static void
l3dss1_disconnect_req(l3_process_t *pc, u_char pr, void *arg)
{
cause_t *cause = arg;
struct sk_buff *skb;
u_char tmp[16+40];
u_char *cp, *p = tmp;
int l;
cause_t tmpcause;
StopAllL3Timer(pc);
MsgHead(p, pc->callref, MT_DISCONNECT);
if (!cause) {
cause = &tmpcause;
cause->len = 2;
cause->loc = 0x80 | CAUSE_LOC_USER;
cause->val = 0x80 | CAUSE_NORMALUNSPECIFIED;
}
*p++ = IE_CAUSE;
cp = (u_char *)cause;
l = *cp;
*p++ = *cp++;
while(l--)
*p++ = *cp++;
#if 0
if (pc->prot.dss1.uus1_data[0])
{ *p++ = IE_USER_USER; /* UUS info element */
*p++ = strlen(pc->prot.dss1.uus1_data) + 1;
*p++ = 0x04; /* IA5 chars */
strcpy(p,pc->prot.dss1.uus1_data);
p += strlen(pc->prot.dss1.uus1_data);
pc->prot.dss1.uus1_data[0] = '\0';
}
#endif
l = p - tmp;
if (!(skb = l3_alloc_skb(l)))
return;
memcpy(skb_put(skb, l), tmp, l);
newl3state(pc, 11);
l3_msg(pc->l3, DL_DATA | REQUEST, skb);
L3AddTimer(&pc->timer, T305, CC_T305);
}
static void
l3dss1_setup_rsp(l3_process_t *pc, u_char pr,
void *arg)
{
#if 0
if (!pc->para.bchannel) {
if (pc->debug & L3_DEB_WARN)
l3_debug(pc->l3, "D-chan connect for waiting call");
l3dss1_disconnect_req(pc, pr, NULL);
return;
}
#endif
newl3state(pc, 8);
l3dss1_message(pc, MT_CONNECT);
L3DelTimer(&pc->timer);
L3AddTimer(&pc->timer, T313, CC_T313);
}
static void
l3dss1_connect_ack(l3_process_t *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) {
l3dss1_std_ie_err(pc, ret);
return;
}
newl3state(pc, 10);
L3DelTimer(&pc->timer);
if (ret)
l3dss1_std_ie_err(pc, ret);
hisax_l3up(pc, CC_SETUP_COMPL | INDICATION, pc);
}
static void
l3dss1_reject_req(l3_process_t *pc, u_char pr, void *arg)
{
cause_t *cause = arg;
struct sk_buff *skb;
u_char tmp[16];
u_char *cp,*p = tmp;
int l;
cause_t tmpcause;
MsgHead(p, pc->callref, MT_RELEASE_COMPLETE);
if (!cause) {
cause = &tmpcause;
cause->len = 2;
cause->loc = 0x80 | CAUSE_LOC_USER;
cause->val = 0x80 | CAUSE_CALL_REJECTED;
}
*p++ = IE_CAUSE;
cp = (u_char *)cause;
l = *cp;
*p++ = *cp++;
while(l--)
*p++ = *cp++;
l = p - tmp;
if (!(skb = l3_alloc_skb(l)))
return;
memcpy(skb_put(skb, l), tmp, l);
l3_msg(pc->l3, DL_DATA | REQUEST, skb);
hisax_l3up(pc, CC_RELEASE | INDICATION, pc);
newl3state(pc, 0);
release_l3_process(pc);
}
static void
l3dss1_release(l3_process_t *pc, u_char pr, void *arg)
{
struct sk_buff *skb = arg;
int ret, cause=0;
StopAllL3Timer(pc);
if ((ret = l3dss1_get_cause(pc, skb))>0) {
if (pc->debug & L3_DEB_WARN)
l3_debug(pc->l3, "REL get_cause ret(%d)", ret);
} else if (ret<0)
pc->para.cause.val = NO_CAUSE;
#if 0
{
u_char *p;
if ((p = findie(skb->data, skb->len, IE_FACILITY, 0)))
l3dss1_parse_facility(pc->l3, pc, pc->callref, p);
}
#endif
if ((ret<0) && (pc->state != 11))
cause = CAUSE_MANDATORY_IE_MISS;
else if (ret>0)
cause = CAUSE_INVALID_CONTENTS;
ret = check_infoelements(pc, skb, ie_RELEASE);
if (ERR_IE_COMPREHENSION == ret)
cause = CAUSE_MANDATORY_IE_MISS;
else if ((ERR_IE_UNRECOGNIZED == ret) && (!cause))
cause = CAUSE_IE_NOTIMPLEMENTED;
if (cause)
l3dss1_message_cause(pc, MT_RELEASE_COMPLETE, cause);
else
l3dss1_message(pc, MT_RELEASE_COMPLETE);
hisax_l3up(pc, CC_RELEASE | INDICATION, pc);
newl3state(pc, 0);
release_l3_process(pc);
}
static void
l3dss1_alert_req(l3_process_t *pc, u_char pr, void *arg)
{
newl3state(pc, 7);
// if (!pc->prot.dss1.uus1_data[0])
l3dss1_message(pc, MT_ALERTING);
// else
// l3dss1_msg_with_uus(pc, MT_ALERTING);
}
static void
l3dss1_proceed_req(l3_process_t *pc, u_char pr, void *arg)
{
newl3state(pc, 9);
l3dss1_message(pc, MT_CALL_PROCEEDING);
hisax_l3up(pc, CC_PROCEED_SEND | INDICATION, pc);
}
static void
l3dss1_setup_ack_req(l3_process_t *pc, u_char pr, void *arg)
{
newl3state(pc, 25);
L3DelTimer(&pc->timer);
L3AddTimer(&pc->timer, T302, CC_T302);
l3dss1_message(pc, MT_SETUP_ACKNOWLEDGE);
}
#if 0
/********************************************/
/* deliver a incoming display message to HL */
/********************************************/
static void
l3dss1_deliver_display(l3_process_t *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->l3->l1.hardware;
ic.driver = cs->myid;
ic.arg = pc->chan->chan;
cs->iif.statcallb(&ic);
} /* l3dss1_deliver_display */
#endif
static void
l3dss1_progress(l3_process_t *pc, u_char pr, void *arg) {
struct sk_buff *skb = arg;
int err = 0;
u_char *p, cause = CAUSE_INVALID_CONTENTS;
if ((p = findie(skb->data, skb->len, IE_PROGRESS, 0))) {
if (p[1] != 2) {
err = 1;
} 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;
break;
}
break;
default:
err = 3;
break;
}
}
} else {
cause = CAUSE_MANDATORY_IE_MISS;
err = 4;
}
if (err) {
if (pc->debug & L3_DEB_WARN)
l3_debug(pc->l3, "progress error %d", err);
l3dss1_status_send(pc, CAUSE_LOC_USER, cause);
return;
}
/* Now we are on none mandatory IEs */
err = check_infoelements(pc, skb, ie_PROGRESS);
if (err)
l3dss1_std_ie_err(pc, err);
if (ERR_IE_COMPREHENSION != err)
hisax_l3up(pc, CC_PROGRESS | INDICATION, pc);
}
static void
l3dss1_notify(l3_process_t *pc, u_char pr, void *arg) {
struct sk_buff *skb = arg;
int err = 0;
u_char *p, cause = CAUSE_INVALID_CONTENTS;
if ((p = findie(skb->data, skb->len, IE_NOTIFY, 0))) {
if (p[1] != 1) {
err = 1;
} else {
switch (p[2]) {
case 0x80:
case 0x81:
case 0x82:
break;
default:
err = 2;
break;
}
}
} else {
cause = CAUSE_MANDATORY_IE_MISS;
err = 3;
}
if (err) {
if (pc->debug & L3_DEB_WARN)
l3_debug(pc->l3, "notify error %d", err);
l3dss1_status_send(pc, CAUSE_LOC_USER, cause);
return;
}
/* Now we are on none mandatory IEs */
err = check_infoelements(pc, skb, ie_NOTIFY);
if (err)
l3dss1_std_ie_err(pc, err);
if (ERR_IE_COMPREHENSION != err)
hisax_l3up(pc, CC_NOTIFY | INDICATION, pc);
}
static void
l3dss1_status_enq(l3_process_t *pc, u_char pr, void *arg) {
int ret;
struct sk_buff *skb = arg;
ret = check_infoelements(pc, skb, ie_STATUS_ENQUIRY);
l3dss1_std_ie_err(pc, ret);
l3dss1_status_send(pc, CAUSE_LOC_USER, CAUSE_STATUS_RESPONSE);
}
static void
l3dss1_information(l3_process_t *pc, u_char pr, void *arg) {
int ret;
struct sk_buff *skb = arg;
ret = check_infoelements(pc, skb, ie_INFORMATION);
if (ret)
l3dss1_std_ie_err(pc, ret);
#if 0
u_char *p;
char tmp[32];
if (pc->state == 25) { /* overlap receiving */
L3DelTimer(&pc->timer);
if ((p = findie(skb->data, skb->len, IE_CALLED_PN, 0))) {
iecpy(tmp, p, 1);
strcat(pc->para.setup.eazmsn, tmp);
hisax_l3up(pc, CC_MORE_INFO | INDICATION, pc);
}
L3AddTimer(&pc->timer, T302, CC_T302);
}
#endif
}
#if 0
/******************************/
/* handle deflection requests */
/******************************/
static void l3dss1_redir_req(l3_process_t *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.dss1.uus1_data,pc->chan->setup.eazmsn); /* copy uus element if available */
if (!pc->chan->setup.phone[0])
{ pc->para.cause = -1;
l3dss1_disconnect_req(pc,pr,arg); /* disconnect immediately */
return;
} /* only uus */
if (pc->prot.dss1.invoke_id)
free_invoke_id(pc->l3,pc->prot.dss1.invoke_id);
if (!(pc->prot.dss1.invoke_id = new_invoke_id(pc->l3)))
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 subadress 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.dss1.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 subadress */
*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->l3, DL_DATA | REQUEST, skb);
} /* l3dss1_redir_req */
/********************************************/
/* handle deflection request in early state */
/********************************************/
static void l3dss1_redir_req_early(l3_process_t *pc, u_char pr, void *arg)
{
l3dss1_proceed_req(pc,pr,arg);
l3dss1_redir_req(pc,pr,arg);
} /* l3dss1_redir_req_early */
/***********************************************/
/* handle special commands for this protocol. */
/* Examples are call independant services like */
/* remote operations with dummy callref. */
/***********************************************/
static int l3dss1_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;
l3_process_t *pc = NULL;
switch (ic->arg)
{ case DSS1_CMD_INVOKE:
if (ic->parm.dss1_io.datalen < 0) return(-2); /* invalid parameter */
for (proc_len = 1, i = ic->parm.dss1_io.proc >> 8; i; i++)
i = i >> 8; /* add one byte */
l = ic->parm.dss1_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.dss1_io.proc >> (i-1)) & 0xFF;
memcpy(p, ic->parm.dss1_io.data, ic->parm.dss1_io.datalen); /* copy data */
l = (p - temp) + ic->parm.dss1_io.datalen; /* total length */
if (ic->parm.dss1_io.timeout > 0)
if (!(pc = dss1_new_l3_process(st, -1)))
{ free_invoke_id(st, id);
return(-2);
}
pc->prot.dss1.ll_id = ic->parm.dss1_io.ll_id; /* remember id */
pc->prot.dss1.proc = ic->parm.dss1_io.proc; /* and procedure */
if (!(skb = l3_alloc_skb(l)))
{ free_invoke_id(st, id);
if (pc)
release_l3_process(pc);
return(-2);
}
memcpy(skb_put(skb, l), temp, l);
if (pc)
{ pc->prot.dss1.invoke_id = id; /* remember id */
L3AddTimer(&pc->timer, ic->parm.dss1_io.timeout, CC_TDSS1_IO | REQUEST);
}
l3_msg(st, DL_DATA | REQUEST, skb);
ic->parm.dss1_io.hl_id = id; /* return id */
return(0);
case DSS1_CMD_INVOKE_ABORT:
if ((pc = l3dss1_search_dummy_proc(st, ic->parm.dss1_io.hl_id)))
{ L3DelTimer(&pc->timer); /* remove timer */
release_l3_process(pc);
return(0);
}
else
{ l3_debug(st, "l3dss1_cmd_global abort unknown id");
return(-2);
}
break;
default:
l3_debug(st, "l3dss1_cmd_global unknown cmd 0x%lx", ic->arg);
return(-1);
} /* switch ic-> arg */
return(-1);
} /* l3dss1_cmd_global */
static void
l3dss1_io_timer(l3_process_t *pc)
{ isdn_ctrl ic;
struct IsdnCardState *cs = pc->l3->l1.hardware;
L3DelTimer(&pc->timer); /* remove timer */
ic.driver = cs->myid;
ic.command = ISDN_STAT_PROT;
ic.arg = DSS1_STAT_INVOKE_ERR;
ic.parm.dss1_io.hl_id = pc->prot.dss1.invoke_id;
ic.parm.dss1_io.ll_id = pc->prot.dss1.ll_id;
ic.parm.dss1_io.proc = pc->prot.dss1.proc;
ic.parm.dss1_io.timeout= -1;
ic.parm.dss1_io.datalen = 0;
ic.parm.dss1_io.data = NULL;
free_invoke_id(pc->l3, pc->prot.dss1.invoke_id);
pc->prot.dss1.invoke_id = 0; /* reset id */
cs->iif.statcallb(&ic);
release_l3_process(pc);
} /* l3dss1_io_timer */
#endif
static void
l3dss1_release_ind(l3_process_t *pc, u_char pr, void *arg)
{
u_char *p;
struct sk_buff *skb = arg;
int callState = 0;
if ((p = findie(skb->data, 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
*/
hisax_l3up(pc, CC_RELEASE | INDICATION, pc);
newl3state(pc, 0);
release_l3_process(pc);
} else {
hisax_l3up(pc, CC_IGNORE | INDICATION, pc);
}
}
static void
l3dss1_dummy(l3_process_t *pc, u_char pr, void *arg)
{
}
static void
l3dss1_t302(l3_process_t *pc, u_char pr, void *arg)
{
cause_t cause;
L3DelTimer(&pc->timer);
cause.len = 2;
cause.loc = 0x80 | CAUSE_LOC_USER;
cause.val = 0x80 | CAUSE_INVALID_NUMBER;
l3dss1_disconnect_req(pc, pr, &cause);
hisax_l3up(pc, CC_SETUP_ERR, pc);
}
static void
l3dss1_t303(l3_process_t *pc, u_char pr, void *arg)
{
if (pc->N303 > 0) {
pc->N303--;
L3DelTimer(&pc->timer);
l3dss1_setup_req(pc, pr, arg);
} else {
L3DelTimer(&pc->timer);
l3dss1_message_cause(pc, MT_RELEASE_COMPLETE, CAUSE_TIMER_EXPIRED);
hisax_l3up(pc, CC_NOSETUP_RSP, pc);
release_l3_process(pc);
}
}
static void
l3dss1_t304(l3_process_t *pc, u_char pr, void *arg)
{
cause_t cause;
L3DelTimer(&pc->timer);
cause.len = 2;
cause.loc = 0x80 | CAUSE_LOC_USER;
cause.val = 0x80 | CAUSE_TIMER_EXPIRED;
l3dss1_disconnect_req(pc, pr, &cause);
hisax_l3up(pc, CC_SETUP_ERR, pc);
}
static void
l3dss1_t305(l3_process_t *pc, u_char pr, void *arg)
{
L3DelTimer(&pc->timer);
#if 0
if (pc->para.cause != NO_CAUSE)
cause = pc->para.cause;
#endif
newl3state(pc, 19);
l3dss1_message_cause(pc, MT_RELEASE, CAUSE_NORMALUNSPECIFIED);
L3AddTimer(&pc->timer, T308, CC_T308_1);
}
static void
l3dss1_t310(l3_process_t *pc, u_char pr, void *arg)
{
cause_t cause;
L3DelTimer(&pc->timer);
cause.len = 2;
cause.loc = 0x80 | CAUSE_LOC_USER;
cause.val = 0x80 | CAUSE_TIMER_EXPIRED;
l3dss1_disconnect_req(pc, pr, &cause);
hisax_l3up(pc, CC_SETUP_ERR, pc);
}
static void
l3dss1_t313(l3_process_t *pc, u_char pr, void *arg)
{
cause_t cause;
L3DelTimer(&pc->timer);
cause.len = 2;
cause.loc = 0x80 | CAUSE_LOC_USER;
cause.val = 0x80 | CAUSE_TIMER_EXPIRED;
l3dss1_disconnect_req(pc, pr, &cause);
hisax_l3up(pc, CC_CONNECT_ERR, pc);
}
static void
l3dss1_t308_1(l3_process_t *pc, u_char pr, void *arg)
{
newl3state(pc, 19);
L3DelTimer(&pc->timer);
l3dss1_message(pc, MT_RELEASE);
L3AddTimer(&pc->timer, T308, CC_T308_2);
}
static void
l3dss1_t308_2(l3_process_t *pc, u_char pr, void *arg)
{
L3DelTimer(&pc->timer);
hisax_l3up(pc, CC_RELEASE_ERR, pc);
release_l3_process(pc);
}
static void
l3dss1_t318(l3_process_t *pc, u_char pr, void *arg)
{
L3DelTimer(&pc->timer);
#if 0
pc->para.cause = 102; /* Timer expiry */
pc->para.loc = 0; /* local */
#endif
hisax_l3up(pc, CC_RESUME_ERR, pc);
newl3state(pc, 19);
l3dss1_message(pc, MT_RELEASE);
L3AddTimer(&pc->timer, T308, CC_T308_1);
}
static void
l3dss1_t319(l3_process_t *pc, u_char pr, void *arg)
{
L3DelTimer(&pc->timer);
#if 0
pc->para.cause = 102; /* Timer expiry */
pc->para.loc = 0; /* local */
#endif
hisax_l3up(pc, CC_SUSPEND_ERR, pc);
newl3state(pc, 10);
}
static void
l3dss1_restart(l3_process_t *pc, u_char pr, void *arg) {
L3DelTimer(&pc->timer);
hisax_l3up(pc, CC_RELEASE | INDICATION, pc);
release_l3_process(pc);
}
static void
l3dss1_status(l3_process_t *pc, u_char pr, void *arg) {
u_char *p;
struct sk_buff *skb = arg;
int ret;
u_char cause = 0, callState = 0;
if ((ret = l3dss1_get_cause(pc, skb))) {
if (pc->debug & L3_DEB_WARN)
l3_debug(pc->l3, "STATUS get_cause ret(%d)",ret);
if (ret < 0)
cause = CAUSE_MANDATORY_IE_MISS;
else if (ret > 0)
cause = CAUSE_INVALID_CONTENTS;
}
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 = CAUSE_INVALID_CONTENTS;
} else
cause = CAUSE_INVALID_CONTENTS;
} else
cause = CAUSE_MANDATORY_IE_MISS;
if (!cause) { /* no error before */
ret = check_infoelements(pc, skb, ie_STATUS);
if (ERR_IE_COMPREHENSION == ret)
cause = CAUSE_MANDATORY_IE_MISS;
else if (ERR_IE_UNRECOGNIZED == ret)
cause = CAUSE_IE_NOTIMPLEMENTED;
}
if (cause) {
if (pc->debug & L3_DEB_WARN)
l3_debug(pc->l3, "STATUS error(%d/%d)",ret,cause);
l3dss1_status_send(pc, CAUSE_LOC_USER, cause);
if (cause != CAUSE_IE_NOTIMPLEMENTED)
return;
}
cause = pc->para.cause.val;
if (((cause & 0x7f) == CAUSE_PROTOCOL_ERROR) && (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
*/
hisax_l3up(pc, CC_RELEASE | INDICATION, pc);
newl3state(pc, 0);
release_l3_process(pc);
}
}
static void
l3dss1_facility(l3_process_t *pc, u_char pr, void *arg)
{
struct sk_buff *skb = arg;
int ret;
ret = check_infoelements(pc, skb, ie_FACILITY);
l3dss1_std_ie_err(pc, ret);
#if 0
{
u_char *p;
if ((p = findie(skb->data, skb->len, IE_FACILITY, 0)))
l3dss1_parse_facility(pc->l3, pc, pc->callref, p);
}
#endif
}
static void
l3dss1_suspend_req(l3_process_t *pc, u_char pr, void *arg)
{
u_char *msg = arg;
struct sk_buff *skb;
u_char tmp[32];
u_char *p = tmp;
u_char i, l;
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->l3, "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->l3, DL_DATA | REQUEST, skb);
newl3state(pc, 15);
L3AddTimer(&pc->timer, T319, CC_T319);
}
static void
l3dss1_suspend_ack(l3_process_t *pc, u_char pr, void *arg) {
struct sk_buff *skb = arg;
int ret;
L3DelTimer(&pc->timer);
newl3state(pc, 0);
pc->para.cause.val = NO_CAUSE;
hisax_l3up(pc, 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->l3, "SUSPACK check ie(%d)",ret);
release_l3_process(pc);
}
static void
l3dss1_suspend_rej(l3_process_t *pc, u_char pr, void *arg)
{
struct sk_buff *skb = arg;
int ret;
u_char cause;
if ((ret = l3dss1_get_cause(pc, skb))) {
if (pc->debug & L3_DEB_WARN)
l3_debug(pc->l3, "SUSP_REJ get_cause ret(%d)",ret);
if (ret < 0)
cause = CAUSE_MANDATORY_IE_MISS;
else
cause = CAUSE_INVALID_CONTENTS;
l3dss1_status_send(pc, CAUSE_LOC_USER, cause);
return;
}
ret = check_infoelements(pc, skb, ie_SUSPEND_REJECT);
if (ERR_IE_COMPREHENSION == ret) {
l3dss1_std_ie_err(pc, ret);
return;
}
L3DelTimer(&pc->timer);
hisax_l3up(pc, CC_SUSPEND_ERR, pc);
newl3state(pc, 10);
if (ret) /* STATUS for none mandatory IE errors after actions are taken */
l3dss1_std_ie_err(pc, ret);
}
static void
l3dss1_resume_req(l3_process_t *pc, u_char pr, void *arg)
{
u_char *msg = arg;
struct sk_buff *skb;
u_char tmp[32];
u_char *p = tmp;
u_char i, l;
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->l3, "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->l3, DL_DATA | REQUEST, skb);
newl3state(pc, 17);
L3AddTimer(&pc->timer, T318, CC_T318);
}
static void
l3dss1_resume_ack(l3_process_t *pc, u_char pr, void *arg)
{
struct sk_buff *skb = arg;
int id, ret;
if ((id = l3dss1_get_channel_id(pc, skb, &pc->para.channel)) > 0) {
if ((0 == id) || (3 == id)) {
if (pc->debug & L3_DEB_WARN)
l3_debug(pc->l3, "resume ack with wrong chid %x", id);
l3dss1_status_send(pc, CAUSE_LOC_USER, CAUSE_INVALID_CONTENTS);
return;
}
// pc->para.bchannel = id;
} else if (1 == pc->state) {
if (pc->debug & L3_DEB_WARN)
l3_debug(pc->l3, "resume ack without chid (ret %d)", id);
l3dss1_status_send(pc, CAUSE_LOC_USER, CAUSE_MANDATORY_IE_MISS);
return;
}
ret = check_infoelements(pc, skb, ie_RESUME_ACKNOWLEDGE);
if (ERR_IE_COMPREHENSION == ret) {
l3dss1_std_ie_err(pc, ret);
return;
}
L3DelTimer(&pc->timer);
hisax_l3up(pc, CC_RESUME | CONFIRM, pc);
newl3state(pc, 10);
if (ret) /* STATUS for none mandatory IE errors after actions are taken */
l3dss1_std_ie_err(pc, ret);
}
static void
l3dss1_resume_rej(l3_process_t *pc, u_char pr, void *arg)
{
struct sk_buff *skb = arg;
int ret;
u_char cause;
if ((ret = l3dss1_get_cause(pc, skb))) {
if (pc->debug & L3_DEB_WARN)
l3_debug(pc->l3, "RES_REJ get_cause ret(%d)",ret);
if (ret < 0)
cause = CAUSE_MANDATORY_IE_MISS;
else
cause = CAUSE_INVALID_CONTENTS;
l3dss1_status_send(pc, CAUSE_LOC_USER, cause);
return;
}
ret = check_infoelements(pc, skb, ie_RESUME_REJECT);
if (ERR_IE_COMPREHENSION == ret) {
l3dss1_std_ie_err(pc, ret);
return;
}
L3DelTimer(&pc->timer);
hisax_l3up(pc, CC_RESUME_ERR, pc);
newl3state(pc, 0);
if (ret) /* STATUS for none mandatory IE errors after actions are taken */
l3dss1_std_ie_err(pc, ret);
release_l3_process(pc);
}
static void
l3dss1_global_restart(l3_process_t *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;
l3_process_t *up;
newl3state(pc, 2);
L3DelTimer(&pc->timer);
if ((p = findie(skb->data, skb->len, IE_RESTART_IND, 0))) {
ri = p[2];
l3_debug(pc->l3, "Restart %x", ri);
} else {
l3_debug(pc->l3, "Restart without restart IE");
ri = 0x86;
}
if ((p = findie(skb->data, skb->len, IE_CHANNEL_ID, 0))) {
chan = p[2] & 3;
ch = p[2];
if (pc->debug)
l3_debug(pc->l3, "Restart for channel %d", chan);
}
newl3state(pc, 2);
up = pc->l3->proc;
while (up) {
if ((ri & 7) == 7)
up->l3->p_down(up->l3, 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++ = IE_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->l3, DL_DATA | REQUEST, skb);
}
static void
l3dss1_dl_reset(l3_process_t *pc, u_char pr, void *arg)
{
cause_t cause;
cause.len = 2;
cause.loc = 0x80 | CAUSE_LOC_USER;
cause.val = 0x80 | CAUSE_TEMPORARY_FAILURE;
l3dss1_disconnect_req(pc, pr, &cause);
hisax_l3up(pc, CC_SETUP_ERR, pc);
}
static void
l3dss1_dl_release(l3_process_t *pc, u_char pr, void *arg)
{
newl3state(pc, 0);
#if 0
pc->para.cause = 0x1b; /* Destination out of order */
pc->para.loc = 0;
#endif
hisax_l3up(pc, CC_RELEASE | INDICATION, pc);
release_l3_process(pc);
}
static void
l3dss1_dl_reestablish(l3_process_t *pc, u_char pr, void *arg)
{
L3DelTimer(&pc->timer);
L3AddTimer(&pc->timer, T309, CC_T309);
l3_msg(pc->l3, DL_ESTABLISH | REQUEST, NULL);
}
static void
l3dss1_dl_reest_status(l3_process_t *pc, u_char pr, void *arg)
{
L3DelTimer(&pc->timer);
l3dss1_status_send(pc, CAUSE_LOC_USER, CAUSE_NORMALUNSPECIFIED);
}
/* *INDENT-OFF* */
static struct stateentry downstatelist[] =
{
{SBIT(0),
CC_SETUP | REQUEST, l3dss1_setup_req},
{SBIT(0),
CC_RESUME | REQUEST, l3dss1_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, l3dss1_disconnect_req},
{SBIT(12),
CC_RELEASE | REQUEST, l3dss1_release_req},
{ALL_STATES,
CC_RESTART | REQUEST, l3dss1_restart},
{SBIT(6) | SBIT(25),
CC_IGNORE | REQUEST, l3dss1_reset},
{SBIT(6) | SBIT(25),
CC_REJECT | REQUEST, l3dss1_reject_req},
{SBIT(6) | SBIT(25),
CC_PROCEED_SEND | REQUEST, l3dss1_proceed_req},
{SBIT(6),
CC_MORE_INFO | REQUEST, l3dss1_setup_ack_req},
{SBIT(25),
CC_MORE_INFO | REQUEST, l3dss1_dummy},
{SBIT(6) | SBIT(9) | SBIT(25),
CC_ALERTING | REQUEST, l3dss1_alert_req},
{SBIT(6) | SBIT(7) | SBIT(9) | SBIT(25),
CC_SETUP | RESPONSE, l3dss1_setup_rsp},
{SBIT(10),
CC_SUSPEND | REQUEST, l3dss1_suspend_req},
#if 0
{SBIT(7) | SBIT(9) | SBIT(25),
CC_REDIR | REQUEST, l3dss1_redir_req},
{SBIT(6),
CC_REDIR | REQUEST, l3dss1_redir_req_early},
#endif
{SBIT(9) | SBIT(25),
CC_DISCONNECT | REQUEST, l3dss1_disconnect_req},
{SBIT(25),
CC_T302, l3dss1_t302},
{SBIT(1),
CC_T303, l3dss1_t303},
{SBIT(2),
CC_T304, l3dss1_t304},
{SBIT(3),
CC_T310, l3dss1_t310},
{SBIT(8),
CC_T313, l3dss1_t313},
{SBIT(11),
CC_T305, l3dss1_t305},
{SBIT(15),
CC_T319, l3dss1_t319},
{SBIT(17),
CC_T318, l3dss1_t318},
{SBIT(19),
CC_T308_1, l3dss1_t308_1},
{SBIT(19),
CC_T308_2, l3dss1_t308_2},
{SBIT(10),
CC_T309, l3dss1_dl_release},
};
#define DOWNSLLEN \
(sizeof(downstatelist) / sizeof(struct stateentry))
static struct stateentry datastatelist[] =
{
{ALL_STATES,
MT_STATUS_ENQUIRY, l3dss1_status_enq},
{ALL_STATES,
MT_FACILITY, l3dss1_facility},
{SBIT(19),
MT_STATUS, l3dss1_release_ind},
{ALL_STATES,
MT_STATUS, l3dss1_status},
{SBIT(0),
MT_SETUP, l3dss1_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, l3dss1_dummy},
{SBIT(1) | SBIT(2),
MT_CALL_PROCEEDING, l3dss1_call_proc},
{SBIT(1),
MT_SETUP_ACKNOWLEDGE, l3dss1_setup_ack},
{SBIT(2) | SBIT(3),
MT_ALERTING, l3dss1_alerting},
{SBIT(2) | SBIT(3),
MT_PROGRESS, l3dss1_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, l3dss1_information},
{SBIT(10) | SBIT(11) | SBIT(15),
MT_NOTIFY, l3dss1_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, l3dss1_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, l3dss1_release},
{SBIT(19), MT_RELEASE, l3dss1_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, l3dss1_disconnect},
{SBIT(19),
MT_DISCONNECT, l3dss1_dummy},
{SBIT(1) | SBIT(2) | SBIT(3) | SBIT(4),
MT_CONNECT, l3dss1_connect},
{SBIT(8),
MT_CONNECT_ACKNOWLEDGE, l3dss1_connect_ack},
{SBIT(15),
MT_SUSPEND_ACKNOWLEDGE, l3dss1_suspend_ack},
{SBIT(15),
MT_SUSPEND_REJECT, l3dss1_suspend_rej},
{SBIT(17),
MT_RESUME_ACKNOWLEDGE, l3dss1_resume_ack},
{SBIT(17),
MT_RESUME_REJECT, l3dss1_resume_rej},
};
#define DATASLLEN \
(sizeof(datastatelist) / sizeof(struct stateentry))
static struct stateentry globalmes_list[] =
{
{ALL_STATES,
MT_STATUS, l3dss1_status},
{SBIT(0),
MT_RESTART, l3dss1_global_restart},
/* {SBIT(1),
MT_RESTART_ACKNOWLEDGE, l3dss1_restart_ack},
*/
};
#define GLOBALM_LEN \
(sizeof(globalmes_list) / sizeof(struct stateentry))
static struct stateentry manstatelist[] =
{
{SBIT(2),
DL_ESTABLISH | INDICATION, l3dss1_dl_reset},
{SBIT(10),
DL_ESTABLISH | CONFIRM, l3dss1_dl_reest_status},
{SBIT(10),
DL_RELEASE | INDICATION, l3dss1_dl_reestablish},
{ALL_STATES,
DL_RELEASE | INDICATION, l3dss1_dl_release},
};
#define MANSLLEN \
(sizeof(manstatelist) / sizeof(struct stateentry))
/* *INDENT-ON* */
static void
global_handler(layer3_t *l3, int mt, struct sk_buff *skb)
{
u_char tmp[16];
u_char *p = tmp;
int l;
int i;
l3_process_t *proc = l3->global;
proc->callref = skb->data[2]; /* cr flag */
for (i = 0; i < GLOBALM_LEN; i++)
if ((mt == globalmes_list[i].primitive) &&
((1 << proc->state) & globalmes_list[i].state))
break;
if (i == GLOBALM_LEN) {
if (l3->debug & L3_DEB_STATE) {
l3_debug(l3, "dss1 global state %d mt %x unhandled",
proc->state, mt);
}
MsgHead(p, proc->callref, MT_STATUS);
*p++ = IE_CAUSE;
*p++ = 0x2;
*p++ = 0x80 | CAUSE_LOC_USER;
*p++ = 0x80 | CAUSE_INVALID_CALLREF;
*p++ = IE_CALL_STATE;
*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(l3, DL_DATA | REQUEST, skb);
} else {
if (l3->debug & L3_DEB_STATE) {
l3_debug(l3, "dss1 global %d mt %x",
proc->state, mt);
}
globalmes_list[i].rout(proc, mt, skb);
}
}
static void
dss1up(layer3_t *l3, int pr, void *arg)
{
int i, mt, cr, cause, callState;
char *ptr;
struct sk_buff *skb = arg;
l3_process_t *proc;
switch (pr) {
case (DL_DATA | INDICATION):
case (DL_UNITDATA | INDICATION):
break;
case (DL_ESTABLISH | CONFIRM):
case (DL_ESTABLISH | INDICATION):
case (DL_RELEASE | INDICATION):
case (DL_RELEASE | CONFIRM):
l3_msg(l3, pr, arg);
return;
break;
default:
printk(KERN_ERR "HiSax dss1up unknown pr=%04x\n", pr);
return;
}
if (skb->len < 3) {
l3_debug(l3, "dss1up frame too short(%d)", skb->len);
dev_kfree_skb(skb);
return;
}
if (skb->data[0] != PROTO_DIS_EURO) {
if (l3->debug & L3_DEB_PROTERR) {
l3_debug(l3, "dss1up%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(l3, "dss1up frame too short(%d)", skb->len);
dev_kfree_skb(skb);
return;
}
mt = skb->data[skb->data[1] + 2];
if (l3->debug & L3_DEB_STATE)
l3_debug(l3, "dss1up cr %d", cr);
if (cr == -2) { /* wrong Callref */
if (l3->debug & L3_DEB_WARN)
l3_debug(l3, "dss1up wrong Callref");
dev_kfree_skb(skb);
return;
} else if (cr == -1) { /* Dummy Callref */
#if 0
u_char *p;
if (mt == MT_FACILITY)
if ((p = findie(skb->data, skb->len, IE_FACILITY, 0))) {
l3dss1_parse_facility(st, NULL,
(pr == (DL_DATA | INDICATION)) ? -1 : -2, p);
dev_kfree_skb(skb);
return;
}
#endif
if (l3->debug & L3_DEB_WARN)
l3_debug(l3, "dss1up 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 (l3->debug & L3_DEB_STATE)
l3_debug(l3, "dss1up Global CallRef");
global_handler(l3, mt, skb);
dev_kfree_skb(skb);
return;
} else if (!(proc = getl3proc(l3, 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 (l3->debug & L3_DEB_STATE)
l3_debug(l3, "dss1up wrong CRef flag");
dev_kfree_skb(skb);
return;
}
if (!(proc = new_l3_process(l3, 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) {
cause = 0;
if ((ptr = findie(skb->data, skb->len, IE_CAUSE, 0)) != NULL) {
ptr++;
if (*ptr++ == 2)
ptr++;
cause = *ptr & 0x7f;
}
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 = new_l3_process(l3, cr))) {
l3dss1_msg_without_setup(proc,
CAUSE_LOC_USER, CAUSE_NOTCOMPAT_STATE);
}
}
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 = new_l3_process(l3, cr))) {
l3dss1_msg_without_setup(proc, CAUSE_LOC_USER,
CAUSE_INVALID_CALLREF);
}
return;
}
}
if (l3dss1_check_messagetype_validity(proc, mt, skb)) {
dev_kfree_skb(skb);
return;
}
#if 0
if ((p = findie(skb->data, skb->len, IE_DISPLAY, 0)) != NULL)
l3dss1_deliver_display(proc, pr, p); /* Display IE included */
#endif
for (i = 0; i < DATASLLEN; i++)
if ((mt == datastatelist[i].primitive) &&
((1 << proc->state) & datastatelist[i].state))
break;
if (i == DATASLLEN) {
if (l3->debug & L3_DEB_STATE) {
l3_debug(l3, "dss1up%sstate %d mt %#x unhandled",
(pr == (DL_DATA | INDICATION)) ? " " : "(broadcast) ",
proc->state, mt);
}
if ((MT_RELEASE_COMPLETE != mt) && (MT_RELEASE != mt)) {
l3dss1_status_send(proc, CAUSE_LOC_USER, CAUSE_NOTCOMPAT_STATE);
}
} else {
if (l3->debug & L3_DEB_STATE) {
l3_debug(l3, "dss1up%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
dss1down(layer3_t *l3, int pr, void *arg)
{
int i, cr;
l3_process_t *proc;
if ((DL_ESTABLISH | REQUEST) == pr) {
l3_msg(l3, pr, NULL);
return;
} else if (((CC_SETUP | REQUEST) == pr) || ((CC_RESUME | REQUEST) == pr)) {
cr = newcallref();
cr |= 0x80;
proc = new_l3_process(l3, cr);
} else {
proc = arg;
}
if (!proc) {
printk(KERN_ERR "HiSax dss1down without proc pr=%04x\n", pr);
return;
}
#if 0
if ( pr == (CC_TDSS1_IO | REQUEST)) {
l3dss1_io_timer(proc); /* timer expires */
return;
}
#endif
for (i = 0; i < DOWNSLLEN; i++)
if ((pr == downstatelist[i].primitive) &&
((1 << proc->state) & downstatelist[i].state))
break;
if (i == DOWNSLLEN) {
if (l3->debug & L3_DEB_STATE) {
l3_debug(l3, "dss1down state %d prim %#x unhandled",
proc->state, pr);
}
} else {
if (l3->debug & L3_DEB_STATE) {
l3_debug(l3, "dss1down state %d prim %#x",
proc->state, pr);
}
downstatelist[i].rout(proc, pr, arg);
}
}
static void
dss1man(layer3_t *l3, int pr, void *arg)
{
int i;
l3_process_t *proc = arg;
if (!proc) {
printk(KERN_ERR "HiSax dss1man without proc pr=%04x\n", pr);
return;
}
for (i = 0; i < MANSLLEN; i++)
if ((pr == manstatelist[i].primitive) &&
((1 << proc->state) & manstatelist[i].state))
break;
if (i == MANSLLEN) {
if (l3->debug & L3_DEB_STATE) {
l3_debug(l3, "cr %d dss1man state %d prim %#x unhandled",
proc->callref & 0x7f, proc->state, pr);
}
} else {
if (l3->debug & L3_DEB_STATE) {
l3_debug(l3, "cr %d dss1man state %d prim %#x",
proc->callref & 0x7f, proc->state, pr);
}
manstatelist[i].rout(proc, pr, arg);
}
}
int
init_dss1(layer3_t *l3)
{
char tmp[64];
int i;
l3->p_down = dss1down;
l3->N303 = 1;
if (!(l3->global = kmalloc(sizeof(l3_process_t), GFP_ATOMIC))) {
printk(KERN_ERR "HiSax can't get memory for dss1 global CR\n");
} else {
l3->global->state = 0;
l3->global->callref = 0;
l3->global->next = NULL;
l3->global->debug = L3_DEB_WARN;
l3->global->l3 = l3;
l3->global->N303 = 1;
L3InitTimer(l3->global, &l3->global->timer);
}
strcpy(tmp, dss1_revision);
printk(KERN_INFO "HiSax: DSS1 Rev. %s\n", HiSax_getrev(tmp));
}