350 lines
7.7 KiB
C
350 lines
7.7 KiB
C
/*
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* Callbacks for the FSM
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*
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* Copyright (C) 1996 Universidade de Lisboa
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*
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* Written by Pedro Roque Marques (roque@di.fc.ul.pt)
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*
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* This software may be used and distributed according to the terms of
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* the GNU General Public License, incorporated herein by reference.
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*/
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/*
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* Fix: 19981230 - Carlos Morgado <chbm@techie.com>
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* Port of Nelson Escravana's <nelson.escravana@usa.net> fix to CalledPN
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* NULL pointer dereference in cb_in_1 (originally fixed in 2.0)
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*/
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#include <linux/string.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/slab.h>
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#include <linux/mm.h>
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#include <linux/skbuff.h>
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#include <asm/io.h>
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#include <linux/isdnif.h>
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#include "pcbit.h"
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#include "layer2.h"
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#include "edss1.h"
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#include "callbacks.h"
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#include "capi.h"
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ushort last_ref_num = 1;
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/*
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* send_conn_req
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*
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*/
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void cb_out_1(struct pcbit_dev * dev, struct pcbit_chan* chan,
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struct callb_data *cbdata)
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{
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struct sk_buff *skb;
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int len;
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ushort refnum;
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#ifdef DEBUG
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printk(KERN_DEBUG "Called Party Number: %s\n",
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cbdata->data.setup.CalledPN);
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#endif
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/*
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* hdr - kmalloc in capi_conn_req
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* - kfree when msg has been sent
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*/
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if ((len = capi_conn_req(cbdata->data.setup.CalledPN, &skb,
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chan->proto)) < 0)
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{
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printk("capi_conn_req failed\n");
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return;
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}
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refnum = last_ref_num++ & 0x7fffU;
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chan->callref = 0;
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chan->layer2link = 0;
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chan->snum = 0;
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chan->s_refnum = refnum;
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pcbit_l2_write(dev, MSG_CONN_REQ, refnum, skb, len);
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}
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/*
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* rcv CONNECT
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* will go into ACTIVE state
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* send CONN_ACTIVE_RESP
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* send Select protocol request
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*/
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void cb_out_2(struct pcbit_dev * dev, struct pcbit_chan* chan,
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struct callb_data *data)
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{
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isdn_ctrl ictl;
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struct sk_buff *skb;
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int len;
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ushort refnum;
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if ((len=capi_conn_active_resp(chan, &skb)) < 0)
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{
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printk("capi_conn_active_req failed\n");
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return;
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}
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refnum = last_ref_num++ & 0x7fffU;
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chan->s_refnum = refnum;
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pcbit_l2_write(dev, MSG_CONN_ACTV_RESP, refnum, skb, len);
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ictl.command = ISDN_STAT_DCONN;
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ictl.driver=dev->id;
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ictl.arg=chan->id;
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dev->dev_if->statcallb(&ictl);
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/* ACTIVE D-channel */
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/* Select protocol */
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if ((len=capi_select_proto_req(chan, &skb, 1 /*outgoing*/)) < 0) {
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printk("capi_select_proto_req failed\n");
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return;
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}
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refnum = last_ref_num++ & 0x7fffU;
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chan->s_refnum = refnum;
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pcbit_l2_write(dev, MSG_SELP_REQ, refnum, skb, len);
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}
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/*
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* Incoming call received
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* inform user
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*/
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void cb_in_1(struct pcbit_dev * dev, struct pcbit_chan* chan,
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struct callb_data *cbdata)
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{
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isdn_ctrl ictl;
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unsigned short refnum;
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struct sk_buff *skb;
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int len;
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ictl.command = ISDN_STAT_ICALL;
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ictl.driver=dev->id;
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ictl.arg=chan->id;
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/*
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* ictl.num >= strlen() + strlen() + 5
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*/
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if (cbdata->data.setup.CallingPN == NULL) {
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printk(KERN_DEBUG "NULL CallingPN to phone; using 0\n");
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strcpy(ictl.parm.setup.phone, "0");
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}
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else {
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strcpy(ictl.parm.setup.phone, cbdata->data.setup.CallingPN);
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}
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if (cbdata->data.setup.CalledPN == NULL) {
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printk(KERN_DEBUG "NULL CalledPN to eazmsn; using 0\n");
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strcpy(ictl.parm.setup.eazmsn, "0");
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}
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else {
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strcpy(ictl.parm.setup.eazmsn, cbdata->data.setup.CalledPN);
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}
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ictl.parm.setup.si1 = 7;
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ictl.parm.setup.si2 = 0;
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ictl.parm.setup.plan = 0;
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ictl.parm.setup.screen = 0;
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#ifdef DEBUG
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printk(KERN_DEBUG "statstr: %s\n", ictl.num);
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#endif
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dev->dev_if->statcallb(&ictl);
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if ((len=capi_conn_resp(chan, &skb)) < 0) {
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printk(KERN_DEBUG "capi_conn_resp failed\n");
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return;
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}
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refnum = last_ref_num++ & 0x7fffU;
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chan->s_refnum = refnum;
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pcbit_l2_write(dev, MSG_CONN_RESP, refnum, skb, len);
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}
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/*
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* user has replied
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* open the channel
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* send CONNECT message CONNECT_ACTIVE_REQ in CAPI
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*/
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void cb_in_2(struct pcbit_dev * dev, struct pcbit_chan* chan,
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struct callb_data *data)
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{
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unsigned short refnum;
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struct sk_buff *skb;
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int len;
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if ((len = capi_conn_active_req(chan, &skb)) < 0) {
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printk(KERN_DEBUG "capi_conn_active_req failed\n");
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return;
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}
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refnum = last_ref_num++ & 0x7fffU;
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chan->s_refnum = refnum;
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printk(KERN_DEBUG "sending MSG_CONN_ACTV_REQ\n");
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pcbit_l2_write(dev, MSG_CONN_ACTV_REQ, refnum, skb, len);
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}
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/*
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* CONN_ACK arrived
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* start b-proto selection
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*
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*/
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void cb_in_3(struct pcbit_dev * dev, struct pcbit_chan* chan,
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struct callb_data *data)
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{
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unsigned short refnum;
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struct sk_buff *skb;
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int len;
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if ((len = capi_select_proto_req(chan, &skb, 0 /*incoming*/)) < 0)
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{
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printk("capi_select_proto_req failed\n");
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return;
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}
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refnum = last_ref_num++ & 0x7fffU;
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chan->s_refnum = refnum;
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pcbit_l2_write(dev, MSG_SELP_REQ, refnum, skb, len);
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}
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/*
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* Received disconnect ind on active state
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* send disconnect resp
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* send msg to user
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*/
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void cb_disc_1(struct pcbit_dev * dev, struct pcbit_chan* chan,
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struct callb_data *data)
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{
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struct sk_buff *skb;
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int len;
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ushort refnum;
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isdn_ctrl ictl;
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if ((len = capi_disc_resp(chan, &skb)) < 0) {
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printk("capi_disc_resp failed\n");
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return;
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}
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refnum = last_ref_num++ & 0x7fffU;
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chan->s_refnum = refnum;
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pcbit_l2_write(dev, MSG_DISC_RESP, refnum, skb, len);
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ictl.command = ISDN_STAT_BHUP;
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ictl.driver=dev->id;
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ictl.arg=chan->id;
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dev->dev_if->statcallb(&ictl);
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}
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/*
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* User HANGUP on active/call proceeding state
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* send disc.req
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*/
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void cb_disc_2(struct pcbit_dev * dev, struct pcbit_chan* chan,
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struct callb_data *data)
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{
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struct sk_buff *skb;
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int len;
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ushort refnum;
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if ((len = capi_disc_req(chan->callref, &skb, CAUSE_NORMAL)) < 0)
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{
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printk("capi_disc_req failed\n");
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return;
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}
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refnum = last_ref_num++ & 0x7fffU;
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chan->s_refnum = refnum;
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pcbit_l2_write(dev, MSG_DISC_REQ, refnum, skb, len);
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}
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/*
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* Disc confirm received send BHUP
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* Problem: when the HL driver sends the disc req itself
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* LL receives BHUP
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*/
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void cb_disc_3(struct pcbit_dev * dev, struct pcbit_chan* chan,
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struct callb_data *data)
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{
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isdn_ctrl ictl;
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ictl.command = ISDN_STAT_BHUP;
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ictl.driver=dev->id;
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ictl.arg=chan->id;
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dev->dev_if->statcallb(&ictl);
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}
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void cb_notdone(struct pcbit_dev * dev, struct pcbit_chan* chan,
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struct callb_data *data)
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{
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}
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/*
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* send activate b-chan protocol
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*/
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void cb_selp_1(struct pcbit_dev * dev, struct pcbit_chan* chan,
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struct callb_data *data)
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{
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struct sk_buff *skb;
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int len;
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ushort refnum;
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if ((len = capi_activate_transp_req(chan, &skb)) < 0)
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{
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printk("capi_conn_activate_transp_req failed\n");
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return;
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}
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refnum = last_ref_num++ & 0x7fffU;
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chan->s_refnum = refnum;
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pcbit_l2_write(dev, MSG_ACT_TRANSP_REQ, refnum, skb, len);
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}
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/*
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* Inform User that the B-channel is available
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*/
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void cb_open(struct pcbit_dev * dev, struct pcbit_chan* chan,
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struct callb_data *data)
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{
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isdn_ctrl ictl;
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ictl.command = ISDN_STAT_BCONN;
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ictl.driver=dev->id;
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ictl.arg=chan->id;
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dev->dev_if->statcallb(&ictl);
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}
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