1 /* $Id: isdn_divert.c,v 1.6.6.3 2001/09/23 22:24:36 kai Exp $
3 * DSS1 main diversion supplementary handling for i4l.
5 * Copyright 1999 by Werner Cornelius (werner@isdn4linux.de)
7 * This software may be used and distributed according to the terms
8 * of the GNU General Public License, incorporated herein by reference.
12 #include <linux/proc_fs.h>
13 #include <linux/slab.h>
14 #include <linux/timer.h>
15 #include <linux/jiffies.h>
17 #include "isdn_divert.h"
19 /**********************************/
20 /* structure keeping calling info */
21 /**********************************/
23 isdn_ctrl ics; /* delivered setup + driver parameters */
24 ulong divert_id; /* Id delivered to user */
25 unsigned char akt_state; /* actual state */
26 char deflect_dest[35]; /* deflection destination */
27 struct timer_list timer; /* timer control structure */
28 char info[90]; /* device info output */
29 struct call_struc *next; /* pointer to next entry */
30 struct call_struc *prev;
34 /********************************************/
35 /* structure keeping deflection table entry */
36 /********************************************/
37 struct deflect_struc {
38 struct deflect_struc *next, *prev;
39 divert_rule rule; /* used rule */
43 /*****************************************/
44 /* variables for main diversion services */
45 /*****************************************/
46 /* diversion/deflection processes */
47 static struct call_struc *divert_head = NULL; /* head of remembered entrys */
48 static ulong next_id = 1; /* next info id */
49 static struct deflect_struc *table_head = NULL;
50 static struct deflect_struc *table_tail = NULL;
51 static unsigned char extern_wait_max = 4; /* maximum wait in s for external process */
53 DEFINE_SPINLOCK(divert_lock);
55 /***************************/
56 /* timer callback function */
57 /***************************/
58 static void deflect_timer_expire(ulong arg)
61 struct call_struc *cs = (struct call_struc *) arg;
63 spin_lock_irqsave(&divert_lock, flags);
64 del_timer(&cs->timer); /* delete active timer */
65 spin_unlock_irqrestore(&divert_lock, flags);
67 switch (cs->akt_state) {
69 cs->ics.command = ISDN_CMD_HANGUP; /* cancel action */
70 divert_if.ll_cmd(&cs->ics);
71 spin_lock_irqsave(&divert_lock, flags);
72 cs->akt_state = DEFLECT_AUTODEL; /* delete after timeout */
73 cs->timer.expires = jiffies + (HZ * AUTODEL_TIME);
74 add_timer(&cs->timer);
75 spin_unlock_irqrestore(&divert_lock, flags);
79 cs->ics.command = ISDN_CMD_REDIR; /* protocol */
80 strlcpy(cs->ics.parm.setup.phone, cs->deflect_dest, sizeof(cs->ics.parm.setup.phone));
81 strcpy(cs->ics.parm.setup.eazmsn, "Testtext delayed");
82 divert_if.ll_cmd(&cs->ics);
83 spin_lock_irqsave(&divert_lock, flags);
84 cs->akt_state = DEFLECT_AUTODEL; /* delete after timeout */
85 cs->timer.expires = jiffies + (HZ * AUTODEL_TIME);
86 add_timer(&cs->timer);
87 spin_unlock_irqrestore(&divert_lock, flags);
92 spin_lock_irqsave(&divert_lock, flags);
94 cs->prev->next = cs->next; /* forward link */
96 divert_head = cs->next;
98 cs->next->prev = cs->prev; /* back link */
99 spin_unlock_irqrestore(&divert_lock, flags);
104 } /* deflect_timer_func */
107 /*****************************************/
108 /* handle call forwarding de/activations */
109 /* 0 = deact, 1 = act, 2 = interrogate */
110 /*****************************************/
111 int cf_command(int drvid, int mode,
112 u_char proc, char *msn,
113 u_char service, char *fwd_nr, ulong *procid)
118 char *p, *ielenp, tmp[60];
119 struct call_struc *cs;
121 if (strchr(msn, '.')) return (-EINVAL); /* subaddress not allowed in msn */
122 if ((proc & 0x7F) > 2) return (-EINVAL);
125 *p++ = 0x30; /* enumeration */
126 ielenp = p++; /* remember total length position */
127 *p++ = 0xa; /* proc tag */
128 *p++ = 1; /* length */
129 *p++ = proc & 0x7F; /* procedure to de/activate/interrogate */
130 *p++ = 0xa; /* service tag */
131 *p++ = 1; /* length */
132 *p++ = service; /* service to handle */
135 if (!*fwd_nr) return (-EINVAL); /* destination missing */
136 if (strchr(fwd_nr, '.')) return (-EINVAL); /* subaddress not allowed */
137 fwd_len = strlen(fwd_nr);
138 *p++ = 0x30; /* number enumeration */
139 *p++ = fwd_len + 2; /* complete forward to len */
140 *p++ = 0x80; /* fwd to nr */
141 *p++ = fwd_len; /* length of number */
142 strcpy(p, fwd_nr); /* copy number */
143 p += fwd_len; /* pointer beyond fwd */
146 msnlen = strlen(msn);
147 *p++ = 0x80; /* msn number */
149 *p++ = msnlen; /* length */
155 *ielenp = p - ielenp - 1; /* set total IE length */
157 /* allocate mem for information struct */
158 if (!(cs = kmalloc(sizeof(struct call_struc), GFP_ATOMIC)))
159 return (-ENOMEM); /* no memory */
160 setup_timer(&cs->timer, deflect_timer_expire, (ulong)cs);
162 cs->ics.driver = drvid;
163 cs->ics.command = ISDN_CMD_PROT_IO; /* protocol specific io */
164 cs->ics.arg = DSS1_CMD_INVOKE; /* invoke supplementary service */
165 cs->ics.parm.dss1_io.proc = (mode == 1) ? 7 : (mode == 2) ? 11 : 8; /* operation */
166 cs->ics.parm.dss1_io.timeout = 4000; /* from ETS 300 207-1 */
167 cs->ics.parm.dss1_io.datalen = p - tmp; /* total len */
168 cs->ics.parm.dss1_io.data = tmp; /* start of buffer */
170 spin_lock_irqsave(&divert_lock, flags);
171 cs->ics.parm.dss1_io.ll_id = next_id++; /* id for callback */
172 spin_unlock_irqrestore(&divert_lock, flags);
173 *procid = cs->ics.parm.dss1_io.ll_id;
175 sprintf(cs->info, "%d 0x%lx %s%s 0 %s %02x %d%s%s\n",
176 (!mode) ? DIVERT_DEACTIVATE : (mode == 1) ? DIVERT_ACTIVATE : DIVERT_REPORT,
177 cs->ics.parm.dss1_io.ll_id,
178 (mode != 2) ? "" : "0 ",
179 divert_if.drv_to_name(cs->ics.driver),
183 (mode != 1) ? "" : " 0 ",
184 (mode != 1) ? "" : fwd_nr);
186 retval = divert_if.ll_cmd(&cs->ics); /* execute command */
190 spin_lock_irqsave(&divert_lock, flags);
191 cs->next = divert_head;
193 spin_unlock_irqrestore(&divert_lock, flags);
200 /****************************************/
201 /* handle a external deflection command */
202 /****************************************/
203 int deflect_extern_action(u_char cmd, ulong callid, char *to_nr)
205 struct call_struc *cs;
210 if ((cmd & 0x7F) > 2) return (-EINVAL); /* invalid command */
211 cs = divert_head; /* start of parameter list */
213 if (cs->divert_id == callid) break; /* found */
216 if (!cs) return (-EINVAL); /* invalid callid */
218 ic.driver = cs->ics.driver;
219 ic.arg = cs->ics.arg;
221 if (cs->akt_state == DEFLECT_AUTODEL) return (i); /* no valid call */
222 switch (cmd & 0x7F) {
224 del_timer(&cs->timer);
225 ic.command = ISDN_CMD_HANGUP;
226 i = divert_if.ll_cmd(&ic);
227 spin_lock_irqsave(&divert_lock, flags);
228 cs->akt_state = DEFLECT_AUTODEL; /* delete after timeout */
229 cs->timer.expires = jiffies + (HZ * AUTODEL_TIME);
230 add_timer(&cs->timer);
231 spin_unlock_irqrestore(&divert_lock, flags);
235 if (cs->akt_state == DEFLECT_ALERT) return (0);
236 cmd &= 0x7F; /* never wait */
237 del_timer(&cs->timer);
238 ic.command = ISDN_CMD_ALERT;
239 if ((i = divert_if.ll_cmd(&ic))) {
240 spin_lock_irqsave(&divert_lock, flags);
241 cs->akt_state = DEFLECT_AUTODEL; /* delete after timeout */
242 cs->timer.expires = jiffies + (HZ * AUTODEL_TIME);
243 add_timer(&cs->timer);
244 spin_unlock_irqrestore(&divert_lock, flags);
246 cs->akt_state = DEFLECT_ALERT;
250 del_timer(&cs->timer);
251 strlcpy(cs->ics.parm.setup.phone, to_nr, sizeof(cs->ics.parm.setup.phone));
252 strcpy(cs->ics.parm.setup.eazmsn, "Testtext manual");
253 ic.command = ISDN_CMD_REDIR;
254 if ((i = divert_if.ll_cmd(&ic))) {
255 spin_lock_irqsave(&divert_lock, flags);
256 cs->akt_state = DEFLECT_AUTODEL; /* delete after timeout */
257 cs->timer.expires = jiffies + (HZ * AUTODEL_TIME);
258 add_timer(&cs->timer);
259 spin_unlock_irqrestore(&divert_lock, flags);
261 cs->akt_state = DEFLECT_ALERT;
266 } /* deflect_extern_action */
268 /********************************/
269 /* insert a new rule before idx */
270 /********************************/
271 int insertrule(int idx, divert_rule *newrule)
273 struct deflect_struc *ds, *ds1 = NULL;
276 if (!(ds = kmalloc(sizeof(struct deflect_struc), GFP_KERNEL)))
277 return (-ENOMEM); /* no memory */
279 ds->rule = *newrule; /* set rule */
281 spin_lock_irqsave(&divert_lock, flags);
285 while ((ds1) && (idx > 0))
293 ds->prev = table_tail; /* previous entry */
294 ds->next = NULL; /* end of chain */
296 ds->prev->next = ds; /* last forward */
298 table_head = ds; /* is first entry */
299 table_tail = ds; /* end of queue */
301 ds->next = ds1; /* next entry */
302 ds->prev = ds1->prev; /* prev entry */
303 ds1->prev = ds; /* backward chain old element */
305 table_head = ds; /* first element */
308 spin_unlock_irqrestore(&divert_lock, flags);
312 /***********************************/
313 /* delete the rule at position idx */
314 /***********************************/
315 int deleterule(int idx)
317 struct deflect_struc *ds, *ds1;
321 spin_lock_irqsave(&divert_lock, flags);
325 spin_unlock_irqrestore(&divert_lock, flags);
334 spin_lock_irqsave(&divert_lock, flags);
337 while ((ds) && (idx > 0)) {
343 spin_unlock_irqrestore(&divert_lock, flags);
348 ds->next->prev = ds->prev; /* backward chain */
350 table_tail = ds->prev; /* end of chain */
353 ds->prev->next = ds->next; /* forward chain */
355 table_head = ds->next; /* start of chain */
357 spin_unlock_irqrestore(&divert_lock, flags);
362 /*******************************************/
363 /* get a pointer to a specific rule number */
364 /*******************************************/
365 divert_rule *getruleptr(int idx)
367 struct deflect_struc *ds = table_head;
369 if (idx < 0) return (NULL);
370 while ((ds) && (idx >= 0)) {
380 /*************************************************/
381 /* called from common module on an incoming call */
382 /*************************************************/
383 static int isdn_divert_icall(isdn_ctrl *ic)
387 struct call_struc *cs = NULL;
388 struct deflect_struc *dv;
392 /* first check the internal deflection table */
393 for (dv = table_head; dv; dv = dv->next) {
395 if (((dv->rule.callopt == 1) && (ic->command == ISDN_STAT_ICALLW)) ||
396 ((dv->rule.callopt == 2) && (ic->command == ISDN_STAT_ICALL)))
397 continue; /* call option check */
398 if (!(dv->rule.drvid & (1L << ic->driver)))
399 continue; /* driver not matching */
400 if ((dv->rule.si1) && (dv->rule.si1 != ic->parm.setup.si1))
401 continue; /* si1 not matching */
402 if ((dv->rule.si2) && (dv->rule.si2 != ic->parm.setup.si2))
403 continue; /* si2 not matching */
406 p1 = ic->parm.setup.eazmsn;
409 /* complete compare */
411 accept = 1; /* call accepted */
415 break; /* not accepted */
418 } /* complete compare */
419 if (!accept) continue; /* not accepted */
421 if ((strcmp(dv->rule.caller, "0")) ||
422 (ic->parm.setup.phone[0])) {
424 p1 = ic->parm.setup.phone;
427 /* complete compare */
429 accept = 1; /* call accepted */
433 break; /* not accepted */
436 } /* complete compare */
437 if (!accept) continue; /* not accepted */
440 switch (dv->rule.action) {
445 case DEFLECT_PROCEED:
448 if (dv->rule.action == DEFLECT_PROCEED)
449 if ((!if_used) || ((!extern_wait_max) && (!dv->rule.waittime)))
450 return (0); /* no external deflection needed */
451 if (!(cs = kmalloc(sizeof(struct call_struc), GFP_ATOMIC)))
452 return (0); /* no memory */
453 setup_timer(&cs->timer, deflect_timer_expire,
457 cs->ics = *ic; /* copy incoming data */
458 if (!cs->ics.parm.setup.phone[0]) strcpy(cs->ics.parm.setup.phone, "0");
459 if (!cs->ics.parm.setup.eazmsn[0]) strcpy(cs->ics.parm.setup.eazmsn, "0");
460 cs->ics.parm.setup.screen = dv->rule.screen;
461 if (dv->rule.waittime)
462 cs->timer.expires = jiffies + (HZ * dv->rule.waittime);
463 else if (dv->rule.action == DEFLECT_PROCEED)
464 cs->timer.expires = jiffies + (HZ * extern_wait_max);
466 cs->timer.expires = 0;
467 cs->akt_state = dv->rule.action;
468 spin_lock_irqsave(&divert_lock, flags);
469 cs->divert_id = next_id++; /* new sequence number */
470 spin_unlock_irqrestore(&divert_lock, flags);
472 if (cs->akt_state == DEFLECT_ALERT) {
473 strcpy(cs->deflect_dest, dv->rule.to_nr);
474 if (!cs->timer.expires) {
475 strcpy(ic->parm.setup.eazmsn,
477 ic->parm.setup.screen = dv->rule.screen;
478 strlcpy(ic->parm.setup.phone, dv->rule.to_nr, sizeof(ic->parm.setup.phone));
479 cs->akt_state = DEFLECT_AUTODEL; /* delete after timeout */
480 cs->timer.expires = jiffies + (HZ * AUTODEL_TIME);
483 retval = 1; /* alerting */
485 cs->deflect_dest[0] = '\0';
486 retval = 4; /* only proceed */
488 sprintf(cs->info, "%d 0x%lx %s %s %s %s 0x%x 0x%x %d %d %s\n",
491 divert_if.drv_to_name(cs->ics.driver),
492 (ic->command == ISDN_STAT_ICALLW) ? "1" : "0",
493 cs->ics.parm.setup.phone,
494 cs->ics.parm.setup.eazmsn,
495 cs->ics.parm.setup.si1,
496 cs->ics.parm.setup.si2,
497 cs->ics.parm.setup.screen,
500 if ((dv->rule.action == DEFLECT_REPORT) ||
501 (dv->rule.action == DEFLECT_REJECT)) {
502 put_info_buffer(cs->info);
503 kfree(cs); /* remove */
504 return ((dv->rule.action == DEFLECT_REPORT) ? 0 : 2); /* nothing to do */
509 return 0; /* ignore call */
510 } /* switch action */
511 break; /* will break the 'for' looping */
516 spin_lock_irqsave(&divert_lock, flags);
517 cs->next = divert_head;
519 if (cs->timer.expires) add_timer(&cs->timer);
520 spin_unlock_irqrestore(&divert_lock, flags);
522 put_info_buffer(cs->info);
526 } /* isdn_divert_icall */
529 void deleteprocs(void)
531 struct call_struc *cs, *cs1;
534 spin_lock_irqsave(&divert_lock, flags);
538 del_timer(&cs->timer);
543 spin_unlock_irqrestore(&divert_lock, flags);
546 /****************************************************/
547 /* put a address including address type into buffer */
548 /****************************************************/
549 static int put_address(char *st, u_char *p, int len)
552 u_char adr_typ = 0; /* network standard */
554 if (len < 2) return (retval);
556 retval = *(++p) + 2; /* total length */
557 if (retval > len) return (0); /* too short */
558 len = retval - 2; /* remaining length */
559 if (len < 3) return (0);
560 if ((*(++p) != 0x0A) || (*(++p) != 1)) return (0);
564 if (len < 2) return (0);
565 if (*p++ != 0x12) return (0);
566 if (*p > len) return (0); /* check number length */
568 } else if (*p == 0x80) {
569 retval = *(++p) + 2; /* total length */
570 if (retval > len) return (0);
574 return (0); /* invalid address information */
576 sprintf(st, "%d ", adr_typ);
587 /*************************************/
588 /* report a successful interrogation */
589 /*************************************/
590 static int interrogate_success(isdn_ctrl *ic, struct call_struc *cs)
592 char *src = ic->parm.dss1_io.data;
593 int restlen = ic->parm.dss1_io.datalen;
596 char st[90], *p, *stp;
598 if (restlen < 2) return (-100); /* frame too short */
599 if (*src++ != 0x30) return (-101);
600 if ((n = *src++) > 0x81) return (-102); /* invalid length field */
601 restlen -= 2; /* remaining bytes */
603 if (restlen < 2) return (-103);
604 if ((*(src + restlen - 1)) || (*(src + restlen - 2))) return (-104);
606 } else if (n == 0x81) {
609 if (n > restlen) return (-105);
611 } else if (n > restlen)
614 restlen = n; /* standard format */
615 if (restlen < 3) return (-107); /* no procedure */
616 if ((*src++ != 2) || (*src++ != 1) || (*src++ != 0x0B)) return (-108);
618 if (restlen < 2) return (-109); /* list missing */
621 if ((n = *src++) > 0x81) return (-110); /* invalid length field */
622 restlen -= 2; /* remaining bytes */
624 if (restlen < 2) return (-111);
625 if ((*(src + restlen - 1)) || (*(src + restlen - 2))) return (-112);
627 } else if (n == 0x81) {
630 if (n > restlen) return (-113);
632 } else if (n > restlen)
635 restlen = n; /* standard format */
636 } /* result list header */
638 while (restlen >= 2) {
640 sprintf(stp, "%d 0x%lx %d %s ", DIVERT_REPORT, ic->parm.dss1_io.ll_id,
641 cnt++, divert_if.drv_to_name(ic->driver));
643 if (*src++ != 0x30) return (-115); /* invalid enum */
646 if (n > restlen) return (-116); /* enum length wrong */
648 p = src; /* one entry */
650 if (!(n1 = put_address(stp, p, n & 0xFF))) continue;
654 if (n < 6) continue; /* no service and proc */
655 if ((*p++ != 0x0A) || (*p++ != 1)) continue;
656 sprintf(stp, " 0x%02x ", (*p++) & 0xFF);
658 if ((*p++ != 0x0A) || (*p++ != 1)) continue;
659 sprintf(stp, "%d ", (*p++) & 0xFF);
663 if (*p++ != 0x30) continue;
664 if (*p > (n - 2)) continue;
666 if (!(n1 = put_address(stp, p, n & 0xFF))) continue;
671 } /* while restlen */
672 if (restlen) return (-117);
674 } /* interrogate_success */
676 /*********************************************/
677 /* callback for protocol specific extensions */
678 /*********************************************/
679 static int prot_stat_callback(isdn_ctrl *ic)
681 struct call_struc *cs, *cs1;
685 cs = divert_head; /* start of list */
688 if (ic->driver == cs->ics.driver) {
689 switch (cs->ics.arg) {
690 case DSS1_CMD_INVOKE:
691 if ((cs->ics.parm.dss1_io.ll_id == ic->parm.dss1_io.ll_id) &&
692 (cs->ics.parm.dss1_io.hl_id == ic->parm.dss1_io.hl_id)) {
694 case DSS1_STAT_INVOKE_ERR:
695 sprintf(cs->info, "128 0x%lx 0x%x\n",
696 ic->parm.dss1_io.ll_id,
697 ic->parm.dss1_io.timeout);
698 put_info_buffer(cs->info);
701 case DSS1_STAT_INVOKE_RES:
702 switch (cs->ics.parm.dss1_io.proc) {
705 put_info_buffer(cs->info);
709 i = interrogate_success(ic, cs);
711 sprintf(cs->info, "%d 0x%lx %d\n", DIVERT_REPORT,
712 ic->parm.dss1_io.ll_id, i);
713 put_info_buffer(cs->info);
717 printk(KERN_WARNING "dss1_divert: unknown proc %d\n", cs->ics.parm.dss1_io.proc);
724 printk(KERN_WARNING "dss1_divert unknown invoke answer %lx\n", ic->arg);
727 cs1 = cs; /* remember structure */
729 continue; /* abort search */
733 case DSS1_CMD_INVOKE_ABORT:
734 printk(KERN_WARNING "dss1_divert unhandled invoke abort\n");
738 printk(KERN_WARNING "dss1_divert unknown cmd 0x%lx\n", cs->ics.arg);
740 } /* switch ics.arg */
746 printk(KERN_WARNING "dss1_divert unhandled process\n");
750 if (cs1->ics.driver == -1) {
751 spin_lock_irqsave(&divert_lock, flags);
752 del_timer(&cs1->timer);
754 cs1->prev->next = cs1->next; /* forward link */
756 divert_head = cs1->next;
758 cs1->next->prev = cs1->prev; /* back link */
759 spin_unlock_irqrestore(&divert_lock, flags);
764 } /* prot_stat_callback */
767 /***************************/
768 /* status callback from HL */
769 /***************************/
770 static int isdn_divert_stat_callback(isdn_ctrl *ic)
772 struct call_struc *cs, *cs1;
777 cs = divert_head; /* start of list */
779 if ((ic->driver == cs->ics.driver) &&
780 (ic->arg == cs->ics.arg)) {
781 switch (ic->command) {
783 sprintf(cs->info, "129 0x%lx\n", cs->divert_id);
784 del_timer(&cs->timer);
788 case ISDN_STAT_CAUSE:
789 sprintf(cs->info, "130 0x%lx %s\n", cs->divert_id, ic->parm.num);
792 case ISDN_STAT_REDIR:
793 sprintf(cs->info, "131 0x%lx\n", cs->divert_id);
794 del_timer(&cs->timer);
799 sprintf(cs->info, "999 0x%lx 0x%x\n", cs->divert_id, (int)(ic->command));
802 put_info_buffer(cs->info);
807 if (cs1->ics.driver == -1) {
808 spin_lock_irqsave(&divert_lock, flags);
810 cs1->prev->next = cs1->next; /* forward link */
812 divert_head = cs1->next;
814 cs1->next->prev = cs1->prev; /* back link */
815 spin_unlock_irqrestore(&divert_lock, flags);
819 return (retval); /* not found */
820 } /* isdn_divert_stat_callback */
823 /********************/
824 /* callback from ll */
825 /********************/
826 int ll_callback(isdn_ctrl *ic)
828 switch (ic->command) {
829 case ISDN_STAT_ICALL:
830 case ISDN_STAT_ICALLW:
831 return (isdn_divert_icall(ic));
835 if ((ic->arg & 0xFF) == ISDN_PTYPE_EURO) {
836 if (ic->arg != DSS1_STAT_INVOKE_BRD)
837 return (prot_stat_callback(ic));
839 return (0); /* DSS1 invoke broadcast */
841 return (-1); /* protocol not euro */
844 return (isdn_divert_stat_callback(ic));