![Dan Carpenter](/assets/img/avatar_default.png)
These strings come from a copy_from_user() and there is no way to be sure they are NUL terminated. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
1533 lines
38 KiB
C
1533 lines
38 KiB
C
/* $Id: isdnloop.c,v 1.11.6.7 2001/11/11 19:54:31 kai Exp $
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*
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* ISDN low-level module implementing a dummy loop driver.
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*
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* Copyright 1997 by Fritz Elfert (fritz@isdn4linux.de)
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*
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* This software may be used and distributed according to the terms
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* of the GNU General Public License, incorporated herein by reference.
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*
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*/
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#include <linux/module.h>
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#include <linux/interrupt.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <linux/sched.h>
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#include "isdnloop.h"
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static char *isdnloop_id = "loop0";
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MODULE_DESCRIPTION("ISDN4Linux: Pseudo Driver that simulates an ISDN card");
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MODULE_AUTHOR("Fritz Elfert");
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MODULE_LICENSE("GPL");
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module_param(isdnloop_id, charp, 0);
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MODULE_PARM_DESC(isdnloop_id, "ID-String of first card");
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static int isdnloop_addcard(char *);
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/*
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* Free queue completely.
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*
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* Parameter:
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* card = pointer to card struct
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* channel = channel number
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*/
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static void
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isdnloop_free_queue(isdnloop_card *card, int channel)
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{
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struct sk_buff_head *queue = &card->bqueue[channel];
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skb_queue_purge(queue);
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card->sndcount[channel] = 0;
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}
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/*
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* Send B-Channel data to another virtual card.
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* This routine is called via timer-callback from isdnloop_pollbchan().
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*
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* Parameter:
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* card = pointer to card struct.
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* ch = channel number (0-based)
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*/
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static void
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isdnloop_bchan_send(isdnloop_card *card, int ch)
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{
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isdnloop_card *rcard = card->rcard[ch];
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int rch = card->rch[ch], len, ack;
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struct sk_buff *skb;
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isdn_ctrl cmd;
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while (card->sndcount[ch]) {
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if ((skb = skb_dequeue(&card->bqueue[ch]))) {
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len = skb->len;
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card->sndcount[ch] -= len;
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ack = *(skb->head); /* used as scratch area */
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cmd.driver = card->myid;
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cmd.arg = ch;
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if (rcard) {
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rcard->interface.rcvcallb_skb(rcard->myid, rch, skb);
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} else {
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printk(KERN_WARNING "isdnloop: no rcard, skb dropped\n");
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dev_kfree_skb(skb);
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};
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cmd.command = ISDN_STAT_BSENT;
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cmd.parm.length = len;
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card->interface.statcallb(&cmd);
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} else
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card->sndcount[ch] = 0;
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}
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}
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/*
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* Send/Receive Data to/from the B-Channel.
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* This routine is called via timer-callback.
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* It schedules itself while any B-Channel is open.
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*
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* Parameter:
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* data = pointer to card struct, set by kernel timer.data
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*/
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static void
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isdnloop_pollbchan(unsigned long data)
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{
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isdnloop_card *card = (isdnloop_card *) data;
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unsigned long flags;
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if (card->flags & ISDNLOOP_FLAGS_B1ACTIVE)
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isdnloop_bchan_send(card, 0);
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if (card->flags & ISDNLOOP_FLAGS_B2ACTIVE)
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isdnloop_bchan_send(card, 1);
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if (card->flags & (ISDNLOOP_FLAGS_B1ACTIVE | ISDNLOOP_FLAGS_B2ACTIVE)) {
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/* schedule b-channel polling again */
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spin_lock_irqsave(&card->isdnloop_lock, flags);
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card->rb_timer.expires = jiffies + ISDNLOOP_TIMER_BCREAD;
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add_timer(&card->rb_timer);
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card->flags |= ISDNLOOP_FLAGS_RBTIMER;
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spin_unlock_irqrestore(&card->isdnloop_lock, flags);
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} else
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card->flags &= ~ISDNLOOP_FLAGS_RBTIMER;
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}
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/*
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* Parse ICN-type setup string and fill fields of setup-struct
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* with parsed data.
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*
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* Parameter:
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* setup = setup string, format: [caller-id],si1,si2,[called-id]
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* cmd = pointer to struct to be filled.
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*/
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static void
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isdnloop_parse_setup(char *setup, isdn_ctrl *cmd)
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{
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char *t = setup;
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char *s = strchr(t, ',');
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*s++ = '\0';
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strlcpy(cmd->parm.setup.phone, t, sizeof(cmd->parm.setup.phone));
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s = strchr(t = s, ',');
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*s++ = '\0';
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if (!strlen(t))
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cmd->parm.setup.si1 = 0;
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else
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cmd->parm.setup.si1 = simple_strtoul(t, NULL, 10);
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s = strchr(t = s, ',');
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*s++ = '\0';
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if (!strlen(t))
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cmd->parm.setup.si2 = 0;
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else
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cmd->parm.setup.si2 =
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simple_strtoul(t, NULL, 10);
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strlcpy(cmd->parm.setup.eazmsn, s, sizeof(cmd->parm.setup.eazmsn));
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cmd->parm.setup.plan = 0;
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cmd->parm.setup.screen = 0;
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}
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typedef struct isdnloop_stat {
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char *statstr;
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int command;
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int action;
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} isdnloop_stat;
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/* *INDENT-OFF* */
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static isdnloop_stat isdnloop_stat_table[] =
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{
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{"BCON_", ISDN_STAT_BCONN, 1}, /* B-Channel connected */
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{"BDIS_", ISDN_STAT_BHUP, 2}, /* B-Channel disconnected */
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{"DCON_", ISDN_STAT_DCONN, 0}, /* D-Channel connected */
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{"DDIS_", ISDN_STAT_DHUP, 0}, /* D-Channel disconnected */
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{"DCAL_I", ISDN_STAT_ICALL, 3}, /* Incoming call dialup-line */
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{"DSCA_I", ISDN_STAT_ICALL, 3}, /* Incoming call 1TR6-SPV */
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{"FCALL", ISDN_STAT_ICALL, 4}, /* Leased line connection up */
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{"CIF", ISDN_STAT_CINF, 5}, /* Charge-info, 1TR6-type */
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{"AOC", ISDN_STAT_CINF, 6}, /* Charge-info, DSS1-type */
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{"CAU", ISDN_STAT_CAUSE, 7}, /* Cause code */
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{"TEI OK", ISDN_STAT_RUN, 0}, /* Card connected to wallplug */
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{"E_L1: ACT FAIL", ISDN_STAT_BHUP, 8}, /* Layer-1 activation failed */
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{"E_L2: DATA LIN", ISDN_STAT_BHUP, 8}, /* Layer-2 data link lost */
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{"E_L1: ACTIVATION FAILED",
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ISDN_STAT_BHUP, 8}, /* Layer-1 activation failed */
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{NULL, 0, -1}
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};
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/* *INDENT-ON* */
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/*
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* Parse Status message-strings from virtual card.
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* Depending on status, call statcallb for sending messages to upper
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* levels. Also set/reset B-Channel active-flags.
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*
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* Parameter:
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* status = status string to parse.
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* channel = channel where message comes from.
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* card = card where message comes from.
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*/
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static void
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isdnloop_parse_status(u_char *status, int channel, isdnloop_card *card)
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{
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isdnloop_stat *s = isdnloop_stat_table;
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int action = -1;
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isdn_ctrl cmd;
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while (s->statstr) {
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if (!strncmp(status, s->statstr, strlen(s->statstr))) {
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cmd.command = s->command;
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action = s->action;
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break;
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}
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s++;
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}
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if (action == -1)
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return;
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cmd.driver = card->myid;
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cmd.arg = channel;
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switch (action) {
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case 1:
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/* BCON_x */
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card->flags |= (channel) ?
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ISDNLOOP_FLAGS_B2ACTIVE : ISDNLOOP_FLAGS_B1ACTIVE;
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break;
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case 2:
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/* BDIS_x */
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card->flags &= ~((channel) ?
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ISDNLOOP_FLAGS_B2ACTIVE : ISDNLOOP_FLAGS_B1ACTIVE);
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isdnloop_free_queue(card, channel);
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break;
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case 3:
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/* DCAL_I and DSCA_I */
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isdnloop_parse_setup(status + 6, &cmd);
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break;
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case 4:
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/* FCALL */
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sprintf(cmd.parm.setup.phone, "LEASED%d", card->myid);
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sprintf(cmd.parm.setup.eazmsn, "%d", channel + 1);
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cmd.parm.setup.si1 = 7;
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cmd.parm.setup.si2 = 0;
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cmd.parm.setup.plan = 0;
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cmd.parm.setup.screen = 0;
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break;
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case 5:
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/* CIF */
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strlcpy(cmd.parm.num, status + 3, sizeof(cmd.parm.num));
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break;
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case 6:
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/* AOC */
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snprintf(cmd.parm.num, sizeof(cmd.parm.num), "%d",
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(int) simple_strtoul(status + 7, NULL, 16));
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break;
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case 7:
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/* CAU */
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status += 3;
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if (strlen(status) == 4)
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snprintf(cmd.parm.num, sizeof(cmd.parm.num), "%s%c%c",
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status + 2, *status, *(status + 1));
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else
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strlcpy(cmd.parm.num, status + 1, sizeof(cmd.parm.num));
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break;
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case 8:
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/* Misc Errors on L1 and L2 */
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card->flags &= ~ISDNLOOP_FLAGS_B1ACTIVE;
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isdnloop_free_queue(card, 0);
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cmd.arg = 0;
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cmd.driver = card->myid;
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card->interface.statcallb(&cmd);
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cmd.command = ISDN_STAT_DHUP;
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cmd.arg = 0;
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cmd.driver = card->myid;
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card->interface.statcallb(&cmd);
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cmd.command = ISDN_STAT_BHUP;
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card->flags &= ~ISDNLOOP_FLAGS_B2ACTIVE;
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isdnloop_free_queue(card, 1);
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cmd.arg = 1;
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cmd.driver = card->myid;
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card->interface.statcallb(&cmd);
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cmd.command = ISDN_STAT_DHUP;
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cmd.arg = 1;
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cmd.driver = card->myid;
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break;
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}
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card->interface.statcallb(&cmd);
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}
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/*
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* Store a cwcharacter into ringbuffer for reading from /dev/isdnctrl
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*
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* Parameter:
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* card = pointer to card struct.
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* c = char to store.
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*/
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static void
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isdnloop_putmsg(isdnloop_card *card, unsigned char c)
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{
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ulong flags;
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spin_lock_irqsave(&card->isdnloop_lock, flags);
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*card->msg_buf_write++ = (c == 0xff) ? '\n' : c;
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if (card->msg_buf_write == card->msg_buf_read) {
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if (++card->msg_buf_read > card->msg_buf_end)
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card->msg_buf_read = card->msg_buf;
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}
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if (card->msg_buf_write > card->msg_buf_end)
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card->msg_buf_write = card->msg_buf;
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spin_unlock_irqrestore(&card->isdnloop_lock, flags);
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}
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/*
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* Poll a virtual cards message queue.
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* If there are new status-replies from the card, copy them to
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* ringbuffer for reading on /dev/isdnctrl and call
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* isdnloop_parse_status() for processing them. Watch for special
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* Firmware bootmessage and parse it, to get the D-Channel protocol.
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* If there are B-Channels open, initiate a timer-callback to
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* isdnloop_pollbchan().
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* This routine is called periodically via timer interrupt.
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*
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* Parameter:
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* data = pointer to card struct
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*/
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static void
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isdnloop_polldchan(unsigned long data)
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{
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isdnloop_card *card = (isdnloop_card *) data;
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struct sk_buff *skb;
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int avail;
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int left;
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u_char c;
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int ch;
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unsigned long flags;
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u_char *p;
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isdn_ctrl cmd;
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if ((skb = skb_dequeue(&card->dqueue)))
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avail = skb->len;
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else
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avail = 0;
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for (left = avail; left > 0; left--) {
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c = *skb->data;
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skb_pull(skb, 1);
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isdnloop_putmsg(card, c);
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card->imsg[card->iptr] = c;
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if (card->iptr < 59)
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card->iptr++;
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if (!skb->len) {
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avail++;
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isdnloop_putmsg(card, '\n');
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card->imsg[card->iptr] = 0;
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card->iptr = 0;
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if (card->imsg[0] == '0' && card->imsg[1] >= '0' &&
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card->imsg[1] <= '2' && card->imsg[2] == ';') {
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ch = (card->imsg[1] - '0') - 1;
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p = &card->imsg[3];
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isdnloop_parse_status(p, ch, card);
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} else {
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p = card->imsg;
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if (!strncmp(p, "DRV1.", 5)) {
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printk(KERN_INFO "isdnloop: (%s) %s\n", CID, p);
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if (!strncmp(p + 7, "TC", 2)) {
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card->ptype = ISDN_PTYPE_1TR6;
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card->interface.features |= ISDN_FEATURE_P_1TR6;
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printk(KERN_INFO
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"isdnloop: (%s) 1TR6-Protocol loaded and running\n", CID);
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}
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if (!strncmp(p + 7, "EC", 2)) {
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card->ptype = ISDN_PTYPE_EURO;
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card->interface.features |= ISDN_FEATURE_P_EURO;
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printk(KERN_INFO
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"isdnloop: (%s) Euro-Protocol loaded and running\n", CID);
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}
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continue;
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}
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}
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}
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}
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if (avail) {
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cmd.command = ISDN_STAT_STAVAIL;
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cmd.driver = card->myid;
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cmd.arg = avail;
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card->interface.statcallb(&cmd);
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}
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if (card->flags & (ISDNLOOP_FLAGS_B1ACTIVE | ISDNLOOP_FLAGS_B2ACTIVE))
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if (!(card->flags & ISDNLOOP_FLAGS_RBTIMER)) {
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/* schedule b-channel polling */
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card->flags |= ISDNLOOP_FLAGS_RBTIMER;
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spin_lock_irqsave(&card->isdnloop_lock, flags);
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del_timer(&card->rb_timer);
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card->rb_timer.function = isdnloop_pollbchan;
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card->rb_timer.data = (unsigned long) card;
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card->rb_timer.expires = jiffies + ISDNLOOP_TIMER_BCREAD;
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add_timer(&card->rb_timer);
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spin_unlock_irqrestore(&card->isdnloop_lock, flags);
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}
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/* schedule again */
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spin_lock_irqsave(&card->isdnloop_lock, flags);
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card->st_timer.expires = jiffies + ISDNLOOP_TIMER_DCREAD;
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add_timer(&card->st_timer);
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spin_unlock_irqrestore(&card->isdnloop_lock, flags);
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}
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/*
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* Append a packet to the transmit buffer-queue.
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*
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* Parameter:
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* channel = Number of B-channel
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* skb = packet to send.
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* card = pointer to card-struct
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* Return:
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* Number of bytes transferred, -E??? on error
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*/
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static int
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isdnloop_sendbuf(int channel, struct sk_buff *skb, isdnloop_card *card)
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{
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int len = skb->len;
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unsigned long flags;
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struct sk_buff *nskb;
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if (len > 4000) {
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printk(KERN_WARNING
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"isdnloop: Send packet too large\n");
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return -EINVAL;
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}
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if (len) {
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if (!(card->flags & (channel) ? ISDNLOOP_FLAGS_B2ACTIVE : ISDNLOOP_FLAGS_B1ACTIVE))
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return 0;
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if (card->sndcount[channel] > ISDNLOOP_MAX_SQUEUE)
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return 0;
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spin_lock_irqsave(&card->isdnloop_lock, flags);
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nskb = dev_alloc_skb(skb->len);
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if (nskb) {
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skb_copy_from_linear_data(skb,
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skb_put(nskb, len), len);
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skb_queue_tail(&card->bqueue[channel], nskb);
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dev_kfree_skb(skb);
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} else
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len = 0;
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card->sndcount[channel] += len;
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spin_unlock_irqrestore(&card->isdnloop_lock, flags);
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}
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return len;
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}
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/*
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* Read the messages from the card's ringbuffer
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*
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* Parameter:
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* buf = pointer to buffer.
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* len = number of bytes to read.
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* user = flag, 1: called from userlevel 0: called from kernel.
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* card = pointer to card struct.
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* Return:
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* number of bytes actually transferred.
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*/
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static int
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isdnloop_readstatus(u_char __user *buf, int len, isdnloop_card *card)
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{
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int count;
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u_char __user *p;
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for (p = buf, count = 0; count < len; p++, count++) {
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if (card->msg_buf_read == card->msg_buf_write)
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return count;
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if (put_user(*card->msg_buf_read++, p))
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return -EFAULT;
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if (card->msg_buf_read > card->msg_buf_end)
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card->msg_buf_read = card->msg_buf;
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}
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return count;
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}
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/*
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* Simulate a card's response by appending it to the cards
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* message queue.
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*
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* Parameter:
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* card = pointer to card struct.
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* s = pointer to message-string.
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* ch = channel: 0 = generic messages, 1 and 2 = D-channel messages.
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* Return:
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* 0 on success, 1 on memory squeeze.
|
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*/
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static int
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isdnloop_fake(isdnloop_card *card, char *s, int ch)
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{
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struct sk_buff *skb;
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int len = strlen(s) + ((ch >= 0) ? 3 : 0);
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|
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if (!(skb = dev_alloc_skb(len))) {
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printk(KERN_WARNING "isdnloop: Out of memory in isdnloop_fake\n");
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return 1;
|
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}
|
|
if (ch >= 0)
|
|
sprintf(skb_put(skb, 3), "%02d;", ch);
|
|
memcpy(skb_put(skb, strlen(s)), s, strlen(s));
|
|
skb_queue_tail(&card->dqueue, skb);
|
|
return 0;
|
|
}
|
|
/* *INDENT-OFF* */
|
|
static isdnloop_stat isdnloop_cmd_table[] =
|
|
{
|
|
{"BCON_R", 0, 1}, /* B-Channel connect */
|
|
{"BCON_I", 0, 17}, /* B-Channel connect ind */
|
|
{"BDIS_R", 0, 2}, /* B-Channel disconnect */
|
|
{"DDIS_R", 0, 3}, /* D-Channel disconnect */
|
|
{"DCON_R", 0, 16}, /* D-Channel connect */
|
|
{"DSCA_R", 0, 4}, /* Dial 1TR6-SPV */
|
|
{"DCAL_R", 0, 5}, /* Dial */
|
|
{"EAZC", 0, 6}, /* Clear EAZ listener */
|
|
{"EAZ", 0, 7}, /* Set EAZ listener */
|
|
{"SEEAZ", 0, 8}, /* Get EAZ listener */
|
|
{"MSN", 0, 9}, /* Set/Clear MSN listener */
|
|
{"MSALL", 0, 10}, /* Set multi MSN listeners */
|
|
{"SETSIL", 0, 11}, /* Set SI list */
|
|
{"SEESIL", 0, 12}, /* Get SI list */
|
|
{"SILC", 0, 13}, /* Clear SI list */
|
|
{"LOCK", 0, -1}, /* LOCK channel */
|
|
{"UNLOCK", 0, -1}, /* UNLOCK channel */
|
|
{"FV2ON", 1, 14}, /* Leased mode on */
|
|
{"FV2OFF", 1, 15}, /* Leased mode off */
|
|
{NULL, 0, -1}
|
|
};
|
|
/* *INDENT-ON* */
|
|
|
|
|
|
/*
|
|
* Simulate an error-response from a card.
|
|
*
|
|
* Parameter:
|
|
* card = pointer to card struct.
|
|
*/
|
|
static void
|
|
isdnloop_fake_err(isdnloop_card *card)
|
|
{
|
|
char buf[60];
|
|
|
|
sprintf(buf, "E%s", card->omsg);
|
|
isdnloop_fake(card, buf, -1);
|
|
isdnloop_fake(card, "NAK", -1);
|
|
}
|
|
|
|
static u_char ctable_eu[] =
|
|
{0x00, 0x11, 0x01, 0x12};
|
|
static u_char ctable_1t[] =
|
|
{0x00, 0x3b, 0x01, 0x3a};
|
|
|
|
/*
|
|
* Assemble a simplified cause message depending on the
|
|
* D-channel protocol used.
|
|
*
|
|
* Parameter:
|
|
* card = pointer to card struct.
|
|
* loc = location: 0 = local, 1 = remote.
|
|
* cau = cause: 1 = busy, 2 = nonexistent callerid, 3 = no user responding.
|
|
* Return:
|
|
* Pointer to buffer containing the assembled message.
|
|
*/
|
|
static char *
|
|
isdnloop_unicause(isdnloop_card *card, int loc, int cau)
|
|
{
|
|
static char buf[6];
|
|
|
|
switch (card->ptype) {
|
|
case ISDN_PTYPE_EURO:
|
|
sprintf(buf, "E%02X%02X", (loc) ? 4 : 2, ctable_eu[cau]);
|
|
break;
|
|
case ISDN_PTYPE_1TR6:
|
|
sprintf(buf, "%02X44", ctable_1t[cau]);
|
|
break;
|
|
default:
|
|
return ("0000");
|
|
}
|
|
return (buf);
|
|
}
|
|
|
|
/*
|
|
* Release a virtual connection. Called from timer interrupt, when
|
|
* called party did not respond.
|
|
*
|
|
* Parameter:
|
|
* card = pointer to card struct.
|
|
* ch = channel (0-based)
|
|
*/
|
|
static void
|
|
isdnloop_atimeout(isdnloop_card *card, int ch)
|
|
{
|
|
unsigned long flags;
|
|
char buf[60];
|
|
|
|
spin_lock_irqsave(&card->isdnloop_lock, flags);
|
|
if (card->rcard) {
|
|
isdnloop_fake(card->rcard[ch], "DDIS_I", card->rch[ch] + 1);
|
|
card->rcard[ch]->rcard[card->rch[ch]] = NULL;
|
|
card->rcard[ch] = NULL;
|
|
}
|
|
isdnloop_fake(card, "DDIS_I", ch + 1);
|
|
/* No user responding */
|
|
sprintf(buf, "CAU%s", isdnloop_unicause(card, 1, 3));
|
|
isdnloop_fake(card, buf, ch + 1);
|
|
spin_unlock_irqrestore(&card->isdnloop_lock, flags);
|
|
}
|
|
|
|
/*
|
|
* Wrapper for isdnloop_atimeout().
|
|
*/
|
|
static void
|
|
isdnloop_atimeout0(unsigned long data)
|
|
{
|
|
isdnloop_card *card = (isdnloop_card *) data;
|
|
isdnloop_atimeout(card, 0);
|
|
}
|
|
|
|
/*
|
|
* Wrapper for isdnloop_atimeout().
|
|
*/
|
|
static void
|
|
isdnloop_atimeout1(unsigned long data)
|
|
{
|
|
isdnloop_card *card = (isdnloop_card *) data;
|
|
isdnloop_atimeout(card, 1);
|
|
}
|
|
|
|
/*
|
|
* Install a watchdog for a user, not responding.
|
|
*
|
|
* Parameter:
|
|
* card = pointer to card struct.
|
|
* ch = channel to watch for.
|
|
*/
|
|
static void
|
|
isdnloop_start_ctimer(isdnloop_card *card, int ch)
|
|
{
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&card->isdnloop_lock, flags);
|
|
init_timer(&card->c_timer[ch]);
|
|
card->c_timer[ch].expires = jiffies + ISDNLOOP_TIMER_ALERTWAIT;
|
|
if (ch)
|
|
card->c_timer[ch].function = isdnloop_atimeout1;
|
|
else
|
|
card->c_timer[ch].function = isdnloop_atimeout0;
|
|
card->c_timer[ch].data = (unsigned long) card;
|
|
add_timer(&card->c_timer[ch]);
|
|
spin_unlock_irqrestore(&card->isdnloop_lock, flags);
|
|
}
|
|
|
|
/*
|
|
* Kill a pending channel watchdog.
|
|
*
|
|
* Parameter:
|
|
* card = pointer to card struct.
|
|
* ch = channel (0-based).
|
|
*/
|
|
static void
|
|
isdnloop_kill_ctimer(isdnloop_card *card, int ch)
|
|
{
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&card->isdnloop_lock, flags);
|
|
del_timer(&card->c_timer[ch]);
|
|
spin_unlock_irqrestore(&card->isdnloop_lock, flags);
|
|
}
|
|
|
|
static u_char si2bit[] =
|
|
{0, 1, 0, 0, 0, 2, 0, 4, 0, 0};
|
|
static u_char bit2si[] =
|
|
{1, 5, 7};
|
|
|
|
/*
|
|
* Try finding a listener for an outgoing call.
|
|
*
|
|
* Parameter:
|
|
* card = pointer to calling card.
|
|
* p = pointer to ICN-type setup-string.
|
|
* lch = channel of calling card.
|
|
* cmd = pointer to struct to be filled when parsing setup.
|
|
* Return:
|
|
* 0 = found match, alerting should happen.
|
|
* 1 = found matching number but it is busy.
|
|
* 2 = no matching listener.
|
|
* 3 = found matching number but SI does not match.
|
|
*/
|
|
static int
|
|
isdnloop_try_call(isdnloop_card *card, char *p, int lch, isdn_ctrl *cmd)
|
|
{
|
|
isdnloop_card *cc = cards;
|
|
unsigned long flags;
|
|
int ch;
|
|
int num_match;
|
|
int i;
|
|
char *e;
|
|
char nbuf[32];
|
|
|
|
isdnloop_parse_setup(p, cmd);
|
|
while (cc) {
|
|
for (ch = 0; ch < 2; ch++) {
|
|
/* Exclude ourself */
|
|
if ((cc == card) && (ch == lch))
|
|
continue;
|
|
num_match = 0;
|
|
switch (cc->ptype) {
|
|
case ISDN_PTYPE_EURO:
|
|
for (i = 0; i < 3; i++)
|
|
if (!(strcmp(cc->s0num[i], cmd->parm.setup.phone)))
|
|
num_match = 1;
|
|
break;
|
|
case ISDN_PTYPE_1TR6:
|
|
e = cc->eazlist[ch];
|
|
while (*e) {
|
|
sprintf(nbuf, "%s%c", cc->s0num[0], *e);
|
|
if (!(strcmp(nbuf, cmd->parm.setup.phone)))
|
|
num_match = 1;
|
|
e++;
|
|
}
|
|
}
|
|
if (num_match) {
|
|
spin_lock_irqsave(&card->isdnloop_lock, flags);
|
|
/* channel idle? */
|
|
if (!(cc->rcard[ch])) {
|
|
/* Check SI */
|
|
if (!(si2bit[cmd->parm.setup.si1] & cc->sil[ch])) {
|
|
spin_unlock_irqrestore(&card->isdnloop_lock, flags);
|
|
return 3;
|
|
}
|
|
/* ch is idle, si and number matches */
|
|
cc->rcard[ch] = card;
|
|
cc->rch[ch] = lch;
|
|
card->rcard[lch] = cc;
|
|
card->rch[lch] = ch;
|
|
spin_unlock_irqrestore(&card->isdnloop_lock, flags);
|
|
return 0;
|
|
} else {
|
|
spin_unlock_irqrestore(&card->isdnloop_lock, flags);
|
|
/* num matches, but busy */
|
|
if (ch == 1)
|
|
return 1;
|
|
}
|
|
}
|
|
}
|
|
cc = cc->next;
|
|
}
|
|
return 2;
|
|
}
|
|
|
|
/*
|
|
* Depending on D-channel protocol and caller/called, modify
|
|
* phone number.
|
|
*
|
|
* Parameter:
|
|
* card = pointer to card struct.
|
|
* phone = pointer phone number.
|
|
* caller = flag: 1 = caller, 0 = called.
|
|
* Return:
|
|
* pointer to new phone number.
|
|
*/
|
|
static char *
|
|
isdnloop_vstphone(isdnloop_card *card, char *phone, int caller)
|
|
{
|
|
int i;
|
|
static char nphone[30];
|
|
|
|
if (!card) {
|
|
printk("BUG!!!\n");
|
|
return "";
|
|
}
|
|
switch (card->ptype) {
|
|
case ISDN_PTYPE_EURO:
|
|
if (caller) {
|
|
for (i = 0; i < 2; i++)
|
|
if (!(strcmp(card->s0num[i], phone)))
|
|
return (phone);
|
|
return (card->s0num[0]);
|
|
}
|
|
return (phone);
|
|
break;
|
|
case ISDN_PTYPE_1TR6:
|
|
if (caller) {
|
|
sprintf(nphone, "%s%c", card->s0num[0], phone[0]);
|
|
return (nphone);
|
|
} else
|
|
return (&phone[strlen(phone) - 1]);
|
|
break;
|
|
}
|
|
return "";
|
|
}
|
|
|
|
/*
|
|
* Parse an ICN-type command string sent to the 'card'.
|
|
* Perform misc. actions depending on the command.
|
|
*
|
|
* Parameter:
|
|
* card = pointer to card struct.
|
|
*/
|
|
static void
|
|
isdnloop_parse_cmd(isdnloop_card *card)
|
|
{
|
|
char *p = card->omsg;
|
|
isdn_ctrl cmd;
|
|
char buf[60];
|
|
isdnloop_stat *s = isdnloop_cmd_table;
|
|
int action = -1;
|
|
int i;
|
|
int ch;
|
|
|
|
if ((card->omsg[0] != '0') && (card->omsg[2] != ';')) {
|
|
isdnloop_fake_err(card);
|
|
return;
|
|
}
|
|
ch = card->omsg[1] - '0';
|
|
if ((ch < 0) || (ch > 2)) {
|
|
isdnloop_fake_err(card);
|
|
return;
|
|
}
|
|
p += 3;
|
|
while (s->statstr) {
|
|
if (!strncmp(p, s->statstr, strlen(s->statstr))) {
|
|
action = s->action;
|
|
if (s->command && (ch != 0)) {
|
|
isdnloop_fake_err(card);
|
|
return;
|
|
}
|
|
break;
|
|
}
|
|
s++;
|
|
}
|
|
if (action == -1)
|
|
return;
|
|
switch (action) {
|
|
case 1:
|
|
/* 0x;BCON_R */
|
|
if (card->rcard[ch - 1]) {
|
|
isdnloop_fake(card->rcard[ch - 1], "BCON_I",
|
|
card->rch[ch - 1] + 1);
|
|
isdnloop_fake(card, "BCON_C", ch);
|
|
}
|
|
break;
|
|
case 17:
|
|
/* 0x;BCON_I */
|
|
if (card->rcard[ch - 1]) {
|
|
isdnloop_fake(card->rcard[ch - 1], "BCON_C",
|
|
card->rch[ch - 1] + 1);
|
|
}
|
|
break;
|
|
case 2:
|
|
/* 0x;BDIS_R */
|
|
isdnloop_fake(card, "BDIS_C", ch);
|
|
if (card->rcard[ch - 1]) {
|
|
isdnloop_fake(card->rcard[ch - 1], "BDIS_I",
|
|
card->rch[ch - 1] + 1);
|
|
}
|
|
break;
|
|
case 16:
|
|
/* 0x;DCON_R */
|
|
isdnloop_kill_ctimer(card, ch - 1);
|
|
if (card->rcard[ch - 1]) {
|
|
isdnloop_kill_ctimer(card->rcard[ch - 1], card->rch[ch - 1]);
|
|
isdnloop_fake(card->rcard[ch - 1], "DCON_C",
|
|
card->rch[ch - 1] + 1);
|
|
isdnloop_fake(card, "DCON_C", ch);
|
|
}
|
|
break;
|
|
case 3:
|
|
/* 0x;DDIS_R */
|
|
isdnloop_kill_ctimer(card, ch - 1);
|
|
if (card->rcard[ch - 1]) {
|
|
isdnloop_kill_ctimer(card->rcard[ch - 1], card->rch[ch - 1]);
|
|
isdnloop_fake(card->rcard[ch - 1], "DDIS_I",
|
|
card->rch[ch - 1] + 1);
|
|
card->rcard[ch - 1] = NULL;
|
|
}
|
|
isdnloop_fake(card, "DDIS_C", ch);
|
|
break;
|
|
case 4:
|
|
/* 0x;DSCA_Rdd,yy,zz,oo */
|
|
if (card->ptype != ISDN_PTYPE_1TR6) {
|
|
isdnloop_fake_err(card);
|
|
return;
|
|
}
|
|
/* Fall through */
|
|
case 5:
|
|
/* 0x;DCAL_Rdd,yy,zz,oo */
|
|
p += 6;
|
|
switch (isdnloop_try_call(card, p, ch - 1, &cmd)) {
|
|
case 0:
|
|
/* Alerting */
|
|
sprintf(buf, "D%s_I%s,%02d,%02d,%s",
|
|
(action == 4) ? "SCA" : "CAL",
|
|
isdnloop_vstphone(card, cmd.parm.setup.eazmsn, 1),
|
|
cmd.parm.setup.si1,
|
|
cmd.parm.setup.si2,
|
|
isdnloop_vstphone(card->rcard[ch - 1],
|
|
cmd.parm.setup.phone, 0));
|
|
isdnloop_fake(card->rcard[ch - 1], buf, card->rch[ch - 1] + 1);
|
|
/* Fall through */
|
|
case 3:
|
|
/* si1 does not match, don't alert but start timer */
|
|
isdnloop_start_ctimer(card, ch - 1);
|
|
break;
|
|
case 1:
|
|
/* Remote busy */
|
|
isdnloop_fake(card, "DDIS_I", ch);
|
|
sprintf(buf, "CAU%s", isdnloop_unicause(card, 1, 1));
|
|
isdnloop_fake(card, buf, ch);
|
|
break;
|
|
case 2:
|
|
/* No such user */
|
|
isdnloop_fake(card, "DDIS_I", ch);
|
|
sprintf(buf, "CAU%s", isdnloop_unicause(card, 1, 2));
|
|
isdnloop_fake(card, buf, ch);
|
|
break;
|
|
}
|
|
break;
|
|
case 6:
|
|
/* 0x;EAZC */
|
|
card->eazlist[ch - 1][0] = '\0';
|
|
break;
|
|
case 7:
|
|
/* 0x;EAZ */
|
|
p += 3;
|
|
strcpy(card->eazlist[ch - 1], p);
|
|
break;
|
|
case 8:
|
|
/* 0x;SEEAZ */
|
|
sprintf(buf, "EAZ-LIST: %s", card->eazlist[ch - 1]);
|
|
isdnloop_fake(card, buf, ch + 1);
|
|
break;
|
|
case 9:
|
|
/* 0x;MSN */
|
|
break;
|
|
case 10:
|
|
/* 0x;MSNALL */
|
|
break;
|
|
case 11:
|
|
/* 0x;SETSIL */
|
|
p += 6;
|
|
i = 0;
|
|
while (strchr("0157", *p)) {
|
|
if (i)
|
|
card->sil[ch - 1] |= si2bit[*p - '0'];
|
|
i = (*p++ == '0');
|
|
}
|
|
if (*p)
|
|
isdnloop_fake_err(card);
|
|
break;
|
|
case 12:
|
|
/* 0x;SEESIL */
|
|
sprintf(buf, "SIN-LIST: ");
|
|
p = buf + 10;
|
|
for (i = 0; i < 3; i++)
|
|
if (card->sil[ch - 1] & (1 << i))
|
|
p += sprintf(p, "%02d", bit2si[i]);
|
|
isdnloop_fake(card, buf, ch + 1);
|
|
break;
|
|
case 13:
|
|
/* 0x;SILC */
|
|
card->sil[ch - 1] = 0;
|
|
break;
|
|
case 14:
|
|
/* 00;FV2ON */
|
|
break;
|
|
case 15:
|
|
/* 00;FV2OFF */
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Put command-strings into the of the 'card'. In reality, execute them
|
|
* right in place by calling isdnloop_parse_cmd(). Also copy every
|
|
* command to the read message ringbuffer, preceding it with a '>'.
|
|
* These mesagges can be read at /dev/isdnctrl.
|
|
*
|
|
* Parameter:
|
|
* buf = pointer to command buffer.
|
|
* len = length of buffer data.
|
|
* user = flag: 1 = called form userlevel, 0 called from kernel.
|
|
* card = pointer to card struct.
|
|
* Return:
|
|
* number of bytes transferred (currently always equals len).
|
|
*/
|
|
static int
|
|
isdnloop_writecmd(const u_char *buf, int len, int user, isdnloop_card *card)
|
|
{
|
|
int xcount = 0;
|
|
int ocount = 1;
|
|
isdn_ctrl cmd;
|
|
|
|
while (len) {
|
|
int count = len;
|
|
u_char *p;
|
|
u_char msg[0x100];
|
|
|
|
if (count > 255)
|
|
count = 255;
|
|
if (user) {
|
|
if (copy_from_user(msg, buf, count))
|
|
return -EFAULT;
|
|
} else
|
|
memcpy(msg, buf, count);
|
|
isdnloop_putmsg(card, '>');
|
|
for (p = msg; count > 0; count--, p++) {
|
|
len--;
|
|
xcount++;
|
|
isdnloop_putmsg(card, *p);
|
|
card->omsg[card->optr] = *p;
|
|
if (*p == '\n') {
|
|
card->omsg[card->optr] = '\0';
|
|
card->optr = 0;
|
|
isdnloop_parse_cmd(card);
|
|
if (len) {
|
|
isdnloop_putmsg(card, '>');
|
|
ocount++;
|
|
}
|
|
} else {
|
|
if (card->optr < 59)
|
|
card->optr++;
|
|
}
|
|
ocount++;
|
|
}
|
|
}
|
|
cmd.command = ISDN_STAT_STAVAIL;
|
|
cmd.driver = card->myid;
|
|
cmd.arg = ocount;
|
|
card->interface.statcallb(&cmd);
|
|
return xcount;
|
|
}
|
|
|
|
/*
|
|
* Delete card's pending timers, send STOP to linklevel
|
|
*/
|
|
static void
|
|
isdnloop_stopcard(isdnloop_card *card)
|
|
{
|
|
unsigned long flags;
|
|
isdn_ctrl cmd;
|
|
|
|
spin_lock_irqsave(&card->isdnloop_lock, flags);
|
|
if (card->flags & ISDNLOOP_FLAGS_RUNNING) {
|
|
card->flags &= ~ISDNLOOP_FLAGS_RUNNING;
|
|
del_timer(&card->st_timer);
|
|
del_timer(&card->rb_timer);
|
|
del_timer(&card->c_timer[0]);
|
|
del_timer(&card->c_timer[1]);
|
|
cmd.command = ISDN_STAT_STOP;
|
|
cmd.driver = card->myid;
|
|
card->interface.statcallb(&cmd);
|
|
}
|
|
spin_unlock_irqrestore(&card->isdnloop_lock, flags);
|
|
}
|
|
|
|
/*
|
|
* Stop all cards before unload.
|
|
*/
|
|
static void
|
|
isdnloop_stopallcards(void)
|
|
{
|
|
isdnloop_card *p = cards;
|
|
|
|
while (p) {
|
|
isdnloop_stopcard(p);
|
|
p = p->next;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Start a 'card'. Simulate card's boot message and set the phone
|
|
* number(s) of the virtual 'S0-Interface'. Install D-channel
|
|
* poll timer.
|
|
*
|
|
* Parameter:
|
|
* card = pointer to card struct.
|
|
* sdefp = pointer to struct holding ioctl parameters.
|
|
* Return:
|
|
* 0 on success, -E??? otherwise.
|
|
*/
|
|
static int
|
|
isdnloop_start(isdnloop_card *card, isdnloop_sdef *sdefp)
|
|
{
|
|
unsigned long flags;
|
|
isdnloop_sdef sdef;
|
|
int i;
|
|
|
|
if (card->flags & ISDNLOOP_FLAGS_RUNNING)
|
|
return -EBUSY;
|
|
if (copy_from_user((char *) &sdef, (char *) sdefp, sizeof(sdef)))
|
|
return -EFAULT;
|
|
spin_lock_irqsave(&card->isdnloop_lock, flags);
|
|
switch (sdef.ptype) {
|
|
case ISDN_PTYPE_EURO:
|
|
if (isdnloop_fake(card, "DRV1.23EC-Q.931-CAPI-CNS-BASIS-20.02.96",
|
|
-1)) {
|
|
spin_unlock_irqrestore(&card->isdnloop_lock, flags);
|
|
return -ENOMEM;
|
|
}
|
|
card->sil[0] = card->sil[1] = 4;
|
|
if (isdnloop_fake(card, "TEI OK", 0)) {
|
|
spin_unlock_irqrestore(&card->isdnloop_lock, flags);
|
|
return -ENOMEM;
|
|
}
|
|
for (i = 0; i < 3; i++) {
|
|
strlcpy(card->s0num[i], sdef.num[i],
|
|
sizeof(card->s0num[0]));
|
|
}
|
|
break;
|
|
case ISDN_PTYPE_1TR6:
|
|
if (isdnloop_fake(card, "DRV1.04TC-1TR6-CAPI-CNS-BASIS-29.11.95",
|
|
-1)) {
|
|
spin_unlock_irqrestore(&card->isdnloop_lock, flags);
|
|
return -ENOMEM;
|
|
}
|
|
card->sil[0] = card->sil[1] = 4;
|
|
if (isdnloop_fake(card, "TEI OK", 0)) {
|
|
spin_unlock_irqrestore(&card->isdnloop_lock, flags);
|
|
return -ENOMEM;
|
|
}
|
|
strlcpy(card->s0num[0], sdef.num[0], sizeof(card->s0num[0]));
|
|
card->s0num[1][0] = '\0';
|
|
card->s0num[2][0] = '\0';
|
|
break;
|
|
default:
|
|
spin_unlock_irqrestore(&card->isdnloop_lock, flags);
|
|
printk(KERN_WARNING "isdnloop: Illegal D-channel protocol %d\n",
|
|
sdef.ptype);
|
|
return -EINVAL;
|
|
}
|
|
init_timer(&card->st_timer);
|
|
card->st_timer.expires = jiffies + ISDNLOOP_TIMER_DCREAD;
|
|
card->st_timer.function = isdnloop_polldchan;
|
|
card->st_timer.data = (unsigned long) card;
|
|
add_timer(&card->st_timer);
|
|
card->flags |= ISDNLOOP_FLAGS_RUNNING;
|
|
spin_unlock_irqrestore(&card->isdnloop_lock, flags);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Main handler for commands sent by linklevel.
|
|
*/
|
|
static int
|
|
isdnloop_command(isdn_ctrl *c, isdnloop_card *card)
|
|
{
|
|
ulong a;
|
|
int i;
|
|
char cbuf[60];
|
|
isdn_ctrl cmd;
|
|
isdnloop_cdef cdef;
|
|
|
|
switch (c->command) {
|
|
case ISDN_CMD_IOCTL:
|
|
memcpy(&a, c->parm.num, sizeof(ulong));
|
|
switch (c->arg) {
|
|
case ISDNLOOP_IOCTL_DEBUGVAR:
|
|
return (ulong) card;
|
|
case ISDNLOOP_IOCTL_STARTUP:
|
|
if (!access_ok(VERIFY_READ, (void *) a, sizeof(isdnloop_sdef)))
|
|
return -EFAULT;
|
|
return (isdnloop_start(card, (isdnloop_sdef *) a));
|
|
break;
|
|
case ISDNLOOP_IOCTL_ADDCARD:
|
|
if (copy_from_user((char *)&cdef,
|
|
(char *)a,
|
|
sizeof(cdef)))
|
|
return -EFAULT;
|
|
return (isdnloop_addcard(cdef.id1));
|
|
break;
|
|
case ISDNLOOP_IOCTL_LEASEDCFG:
|
|
if (a) {
|
|
if (!card->leased) {
|
|
card->leased = 1;
|
|
while (card->ptype == ISDN_PTYPE_UNKNOWN)
|
|
schedule_timeout_interruptible(10);
|
|
schedule_timeout_interruptible(10);
|
|
sprintf(cbuf, "00;FV2ON\n01;EAZ1\n02;EAZ2\n");
|
|
i = isdnloop_writecmd(cbuf, strlen(cbuf), 0, card);
|
|
printk(KERN_INFO
|
|
"isdnloop: (%s) Leased-line mode enabled\n",
|
|
CID);
|
|
cmd.command = ISDN_STAT_RUN;
|
|
cmd.driver = card->myid;
|
|
cmd.arg = 0;
|
|
card->interface.statcallb(&cmd);
|
|
}
|
|
} else {
|
|
if (card->leased) {
|
|
card->leased = 0;
|
|
sprintf(cbuf, "00;FV2OFF\n");
|
|
i = isdnloop_writecmd(cbuf, strlen(cbuf), 0, card);
|
|
printk(KERN_INFO
|
|
"isdnloop: (%s) Leased-line mode disabled\n",
|
|
CID);
|
|
cmd.command = ISDN_STAT_RUN;
|
|
cmd.driver = card->myid;
|
|
cmd.arg = 0;
|
|
card->interface.statcallb(&cmd);
|
|
}
|
|
}
|
|
return 0;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
break;
|
|
case ISDN_CMD_DIAL:
|
|
if (!(card->flags & ISDNLOOP_FLAGS_RUNNING))
|
|
return -ENODEV;
|
|
if (card->leased)
|
|
break;
|
|
if ((c->arg & 255) < ISDNLOOP_BCH) {
|
|
char *p;
|
|
char dial[50];
|
|
char dcode[4];
|
|
|
|
a = c->arg;
|
|
p = c->parm.setup.phone;
|
|
if (*p == 's' || *p == 'S') {
|
|
/* Dial for SPV */
|
|
p++;
|
|
strcpy(dcode, "SCA");
|
|
} else
|
|
/* Normal Dial */
|
|
strcpy(dcode, "CAL");
|
|
strcpy(dial, p);
|
|
sprintf(cbuf, "%02d;D%s_R%s,%02d,%02d,%s\n", (int) (a + 1),
|
|
dcode, dial, c->parm.setup.si1,
|
|
c->parm.setup.si2, c->parm.setup.eazmsn);
|
|
i = isdnloop_writecmd(cbuf, strlen(cbuf), 0, card);
|
|
}
|
|
break;
|
|
case ISDN_CMD_ACCEPTD:
|
|
if (!(card->flags & ISDNLOOP_FLAGS_RUNNING))
|
|
return -ENODEV;
|
|
if (c->arg < ISDNLOOP_BCH) {
|
|
a = c->arg + 1;
|
|
cbuf[0] = 0;
|
|
switch (card->l2_proto[a - 1]) {
|
|
case ISDN_PROTO_L2_X75I:
|
|
sprintf(cbuf, "%02d;BX75\n", (int) a);
|
|
break;
|
|
#ifdef CONFIG_ISDN_X25
|
|
case ISDN_PROTO_L2_X25DTE:
|
|
sprintf(cbuf, "%02d;BX2T\n", (int) a);
|
|
break;
|
|
case ISDN_PROTO_L2_X25DCE:
|
|
sprintf(cbuf, "%02d;BX2C\n", (int) a);
|
|
break;
|
|
#endif
|
|
case ISDN_PROTO_L2_HDLC:
|
|
sprintf(cbuf, "%02d;BTRA\n", (int) a);
|
|
break;
|
|
}
|
|
if (strlen(cbuf))
|
|
i = isdnloop_writecmd(cbuf, strlen(cbuf), 0, card);
|
|
sprintf(cbuf, "%02d;DCON_R\n", (int) a);
|
|
i = isdnloop_writecmd(cbuf, strlen(cbuf), 0, card);
|
|
}
|
|
break;
|
|
case ISDN_CMD_ACCEPTB:
|
|
if (!(card->flags & ISDNLOOP_FLAGS_RUNNING))
|
|
return -ENODEV;
|
|
if (c->arg < ISDNLOOP_BCH) {
|
|
a = c->arg + 1;
|
|
switch (card->l2_proto[a - 1]) {
|
|
case ISDN_PROTO_L2_X75I:
|
|
sprintf(cbuf, "%02d;BCON_R,BX75\n", (int) a);
|
|
break;
|
|
#ifdef CONFIG_ISDN_X25
|
|
case ISDN_PROTO_L2_X25DTE:
|
|
sprintf(cbuf, "%02d;BCON_R,BX2T\n", (int) a);
|
|
break;
|
|
case ISDN_PROTO_L2_X25DCE:
|
|
sprintf(cbuf, "%02d;BCON_R,BX2C\n", (int) a);
|
|
break;
|
|
#endif
|
|
case ISDN_PROTO_L2_HDLC:
|
|
sprintf(cbuf, "%02d;BCON_R,BTRA\n", (int) a);
|
|
break;
|
|
default:
|
|
sprintf(cbuf, "%02d;BCON_R\n", (int) a);
|
|
}
|
|
printk(KERN_DEBUG "isdnloop writecmd '%s'\n", cbuf);
|
|
i = isdnloop_writecmd(cbuf, strlen(cbuf), 0, card);
|
|
break;
|
|
case ISDN_CMD_HANGUP:
|
|
if (!(card->flags & ISDNLOOP_FLAGS_RUNNING))
|
|
return -ENODEV;
|
|
if (c->arg < ISDNLOOP_BCH) {
|
|
a = c->arg + 1;
|
|
sprintf(cbuf, "%02d;BDIS_R\n%02d;DDIS_R\n", (int) a, (int) a);
|
|
i = isdnloop_writecmd(cbuf, strlen(cbuf), 0, card);
|
|
}
|
|
break;
|
|
case ISDN_CMD_SETEAZ:
|
|
if (!(card->flags & ISDNLOOP_FLAGS_RUNNING))
|
|
return -ENODEV;
|
|
if (card->leased)
|
|
break;
|
|
if (c->arg < ISDNLOOP_BCH) {
|
|
a = c->arg + 1;
|
|
if (card->ptype == ISDN_PTYPE_EURO) {
|
|
sprintf(cbuf, "%02d;MS%s%s\n", (int) a,
|
|
c->parm.num[0] ? "N" : "ALL", c->parm.num);
|
|
} else
|
|
sprintf(cbuf, "%02d;EAZ%s\n", (int) a,
|
|
c->parm.num[0] ? c->parm.num : (u_char *) "0123456789");
|
|
i = isdnloop_writecmd(cbuf, strlen(cbuf), 0, card);
|
|
}
|
|
break;
|
|
case ISDN_CMD_CLREAZ:
|
|
if (!(card->flags & ISDNLOOP_FLAGS_RUNNING))
|
|
return -ENODEV;
|
|
if (card->leased)
|
|
break;
|
|
if (c->arg < ISDNLOOP_BCH) {
|
|
a = c->arg + 1;
|
|
if (card->ptype == ISDN_PTYPE_EURO)
|
|
sprintf(cbuf, "%02d;MSNC\n", (int) a);
|
|
else
|
|
sprintf(cbuf, "%02d;EAZC\n", (int) a);
|
|
i = isdnloop_writecmd(cbuf, strlen(cbuf), 0, card);
|
|
}
|
|
break;
|
|
case ISDN_CMD_SETL2:
|
|
if (!(card->flags & ISDNLOOP_FLAGS_RUNNING))
|
|
return -ENODEV;
|
|
if ((c->arg & 255) < ISDNLOOP_BCH) {
|
|
a = c->arg;
|
|
switch (a >> 8) {
|
|
case ISDN_PROTO_L2_X75I:
|
|
sprintf(cbuf, "%02d;BX75\n", (int) (a & 255) + 1);
|
|
break;
|
|
#ifdef CONFIG_ISDN_X25
|
|
case ISDN_PROTO_L2_X25DTE:
|
|
sprintf(cbuf, "%02d;BX2T\n", (int) (a & 255) + 1);
|
|
break;
|
|
case ISDN_PROTO_L2_X25DCE:
|
|
sprintf(cbuf, "%02d;BX2C\n", (int) (a & 255) + 1);
|
|
break;
|
|
#endif
|
|
case ISDN_PROTO_L2_HDLC:
|
|
sprintf(cbuf, "%02d;BTRA\n", (int) (a & 255) + 1);
|
|
break;
|
|
case ISDN_PROTO_L2_TRANS:
|
|
sprintf(cbuf, "%02d;BTRA\n", (int) (a & 255) + 1);
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
i = isdnloop_writecmd(cbuf, strlen(cbuf), 0, card);
|
|
card->l2_proto[a & 255] = (a >> 8);
|
|
}
|
|
break;
|
|
case ISDN_CMD_SETL3:
|
|
if (!(card->flags & ISDNLOOP_FLAGS_RUNNING))
|
|
return -ENODEV;
|
|
return 0;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Find card with given driverId
|
|
*/
|
|
static inline isdnloop_card *
|
|
isdnloop_findcard(int driverid)
|
|
{
|
|
isdnloop_card *p = cards;
|
|
|
|
while (p) {
|
|
if (p->myid == driverid)
|
|
return p;
|
|
p = p->next;
|
|
}
|
|
return (isdnloop_card *) 0;
|
|
}
|
|
|
|
/*
|
|
* Wrapper functions for interface to linklevel
|
|
*/
|
|
static int
|
|
if_command(isdn_ctrl *c)
|
|
{
|
|
isdnloop_card *card = isdnloop_findcard(c->driver);
|
|
|
|
if (card)
|
|
return (isdnloop_command(c, card));
|
|
printk(KERN_ERR
|
|
"isdnloop: if_command called with invalid driverId!\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
static int
|
|
if_writecmd(const u_char __user *buf, int len, int id, int channel)
|
|
{
|
|
isdnloop_card *card = isdnloop_findcard(id);
|
|
|
|
if (card) {
|
|
if (!(card->flags & ISDNLOOP_FLAGS_RUNNING))
|
|
return -ENODEV;
|
|
return (isdnloop_writecmd(buf, len, 1, card));
|
|
}
|
|
printk(KERN_ERR
|
|
"isdnloop: if_writecmd called with invalid driverId!\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
static int
|
|
if_readstatus(u_char __user *buf, int len, int id, int channel)
|
|
{
|
|
isdnloop_card *card = isdnloop_findcard(id);
|
|
|
|
if (card) {
|
|
if (!(card->flags & ISDNLOOP_FLAGS_RUNNING))
|
|
return -ENODEV;
|
|
return (isdnloop_readstatus(buf, len, card));
|
|
}
|
|
printk(KERN_ERR
|
|
"isdnloop: if_readstatus called with invalid driverId!\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
static int
|
|
if_sendbuf(int id, int channel, int ack, struct sk_buff *skb)
|
|
{
|
|
isdnloop_card *card = isdnloop_findcard(id);
|
|
|
|
if (card) {
|
|
if (!(card->flags & ISDNLOOP_FLAGS_RUNNING))
|
|
return -ENODEV;
|
|
/* ack request stored in skb scratch area */
|
|
*(skb->head) = ack;
|
|
return (isdnloop_sendbuf(channel, skb, card));
|
|
}
|
|
printk(KERN_ERR
|
|
"isdnloop: if_sendbuf called with invalid driverId!\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
/*
|
|
* Allocate a new card-struct, initialize it
|
|
* link it into cards-list and register it at linklevel.
|
|
*/
|
|
static isdnloop_card *
|
|
isdnloop_initcard(char *id)
|
|
{
|
|
isdnloop_card *card;
|
|
int i;
|
|
|
|
if (!(card = kzalloc(sizeof(isdnloop_card), GFP_KERNEL))) {
|
|
printk(KERN_WARNING
|
|
"isdnloop: (%s) Could not allocate card-struct.\n", id);
|
|
return (isdnloop_card *) 0;
|
|
}
|
|
card->interface.owner = THIS_MODULE;
|
|
card->interface.channels = ISDNLOOP_BCH;
|
|
card->interface.hl_hdrlen = 1; /* scratch area for storing ack flag*/
|
|
card->interface.maxbufsize = 4000;
|
|
card->interface.command = if_command;
|
|
card->interface.writebuf_skb = if_sendbuf;
|
|
card->interface.writecmd = if_writecmd;
|
|
card->interface.readstat = if_readstatus;
|
|
card->interface.features = ISDN_FEATURE_L2_X75I |
|
|
#ifdef CONFIG_ISDN_X25
|
|
ISDN_FEATURE_L2_X25DTE |
|
|
ISDN_FEATURE_L2_X25DCE |
|
|
#endif
|
|
ISDN_FEATURE_L2_HDLC |
|
|
ISDN_FEATURE_L3_TRANS |
|
|
ISDN_FEATURE_P_UNKNOWN;
|
|
card->ptype = ISDN_PTYPE_UNKNOWN;
|
|
strlcpy(card->interface.id, id, sizeof(card->interface.id));
|
|
card->msg_buf_write = card->msg_buf;
|
|
card->msg_buf_read = card->msg_buf;
|
|
card->msg_buf_end = &card->msg_buf[sizeof(card->msg_buf) - 1];
|
|
for (i = 0; i < ISDNLOOP_BCH; i++) {
|
|
card->l2_proto[i] = ISDN_PROTO_L2_X75I;
|
|
skb_queue_head_init(&card->bqueue[i]);
|
|
}
|
|
skb_queue_head_init(&card->dqueue);
|
|
spin_lock_init(&card->isdnloop_lock);
|
|
card->next = cards;
|
|
cards = card;
|
|
if (!register_isdn(&card->interface)) {
|
|
cards = cards->next;
|
|
printk(KERN_WARNING
|
|
"isdnloop: Unable to register %s\n", id);
|
|
kfree(card);
|
|
return (isdnloop_card *) 0;
|
|
}
|
|
card->myid = card->interface.channels;
|
|
return card;
|
|
}
|
|
|
|
static int
|
|
isdnloop_addcard(char *id1)
|
|
{
|
|
isdnloop_card *card;
|
|
|
|
if (!(card = isdnloop_initcard(id1))) {
|
|
return -EIO;
|
|
}
|
|
printk(KERN_INFO
|
|
"isdnloop: (%s) virtual card added\n",
|
|
card->interface.id);
|
|
return 0;
|
|
}
|
|
|
|
static int __init
|
|
isdnloop_init(void)
|
|
{
|
|
if (isdnloop_id)
|
|
return (isdnloop_addcard(isdnloop_id));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __exit
|
|
isdnloop_exit(void)
|
|
{
|
|
isdn_ctrl cmd;
|
|
isdnloop_card *card = cards;
|
|
isdnloop_card *last;
|
|
int i;
|
|
|
|
isdnloop_stopallcards();
|
|
while (card) {
|
|
cmd.command = ISDN_STAT_UNLOAD;
|
|
cmd.driver = card->myid;
|
|
card->interface.statcallb(&cmd);
|
|
for (i = 0; i < ISDNLOOP_BCH; i++)
|
|
isdnloop_free_queue(card, i);
|
|
card = card->next;
|
|
}
|
|
card = cards;
|
|
while (card) {
|
|
last = card;
|
|
skb_queue_purge(&card->dqueue);
|
|
card = card->next;
|
|
kfree(last);
|
|
}
|
|
printk(KERN_NOTICE "isdnloop-ISDN-driver unloaded\n");
|
|
}
|
|
|
|
module_init(isdnloop_init);
|
|
module_exit(isdnloop_exit);
|