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path: root/drivers/isdn/pcbit/callbacks.c
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Diffstat (limited to 'drivers/isdn/pcbit/callbacks.c')
-rw-r--r--drivers/isdn/pcbit/callbacks.c345
1 files changed, 345 insertions, 0 deletions
diff --git a/drivers/isdn/pcbit/callbacks.c b/drivers/isdn/pcbit/callbacks.c
new file mode 100644
index 000000000..efb6d6a36
--- /dev/null
+++ b/drivers/isdn/pcbit/callbacks.c
@@ -0,0 +1,345 @@
+/*
+ * Callbacks for the FSM
+ *
+ * Copyright (C) 1996 Universidade de Lisboa
+ *
+ * Written by Pedro Roque Marques (roque@di.fc.ul.pt)
+ *
+ * This software may be used and distributed according to the terms of
+ * the GNU General Public License, incorporated herein by reference.
+ */
+
+/*
+ * Fix: 19981230 - Carlos Morgado <chbm@techie.com>
+ * Port of Nelson Escravana's <nelson.escravana@usa.net> fix to CalledPN
+ * NULL pointer dereference in cb_in_1 (originally fixed in 2.0)
+ */
+
+#include <linux/string.h>
+#include <linux/kernel.h>
+
+#include <linux/types.h>
+#include <linux/mm.h>
+#include <linux/skbuff.h>
+
+#include <asm/io.h>
+
+#include <linux/isdnif.h>
+
+#include "pcbit.h"
+#include "layer2.h"
+#include "edss1.h"
+#include "callbacks.h"
+#include "capi.h"
+
+ushort last_ref_num = 1;
+
+/*
+ * send_conn_req
+ *
+ */
+
+void cb_out_1(struct pcbit_dev *dev, struct pcbit_chan *chan,
+ struct callb_data *cbdata)
+{
+ struct sk_buff *skb;
+ int len;
+ ushort refnum;
+
+
+#ifdef DEBUG
+ printk(KERN_DEBUG "Called Party Number: %s\n",
+ cbdata->data.setup.CalledPN);
+#endif
+ /*
+ * hdr - kmalloc in capi_conn_req
+ * - kfree when msg has been sent
+ */
+
+ if ((len = capi_conn_req(cbdata->data.setup.CalledPN, &skb,
+ chan->proto)) < 0)
+ {
+ printk("capi_conn_req failed\n");
+ return;
+ }
+
+
+ refnum = last_ref_num++ & 0x7fffU;
+
+ chan->callref = 0;
+ chan->layer2link = 0;
+ chan->snum = 0;
+ chan->s_refnum = refnum;
+
+ pcbit_l2_write(dev, MSG_CONN_REQ, refnum, skb, len);
+}
+
+/*
+ * rcv CONNECT
+ * will go into ACTIVE state
+ * send CONN_ACTIVE_RESP
+ * send Select protocol request
+ */
+
+void cb_out_2(struct pcbit_dev *dev, struct pcbit_chan *chan,
+ struct callb_data *data)
+{
+ isdn_ctrl ictl;
+ struct sk_buff *skb;
+ int len;
+ ushort refnum;
+
+ if ((len = capi_conn_active_resp(chan, &skb)) < 0)
+ {
+ printk("capi_conn_active_req failed\n");
+ return;
+ }
+
+ refnum = last_ref_num++ & 0x7fffU;
+ chan->s_refnum = refnum;
+
+ pcbit_l2_write(dev, MSG_CONN_ACTV_RESP, refnum, skb, len);
+
+
+ ictl.command = ISDN_STAT_DCONN;
+ ictl.driver = dev->id;
+ ictl.arg = chan->id;
+ dev->dev_if->statcallb(&ictl);
+
+ /* ACTIVE D-channel */
+
+ /* Select protocol */
+
+ if ((len = capi_select_proto_req(chan, &skb, 1 /*outgoing*/)) < 0) {
+ printk("capi_select_proto_req failed\n");
+ return;
+ }
+
+ refnum = last_ref_num++ & 0x7fffU;
+ chan->s_refnum = refnum;
+
+ pcbit_l2_write(dev, MSG_SELP_REQ, refnum, skb, len);
+}
+
+
+/*
+ * Incoming call received
+ * inform user
+ */
+
+void cb_in_1(struct pcbit_dev *dev, struct pcbit_chan *chan,
+ struct callb_data *cbdata)
+{
+ isdn_ctrl ictl;
+ unsigned short refnum;
+ struct sk_buff *skb;
+ int len;
+
+
+ ictl.command = ISDN_STAT_ICALL;
+ ictl.driver = dev->id;
+ ictl.arg = chan->id;
+
+ /*
+ * ictl.num >= strlen() + strlen() + 5
+ */
+
+ if (cbdata->data.setup.CallingPN == NULL) {
+ printk(KERN_DEBUG "NULL CallingPN to phone; using 0\n");
+ strcpy(ictl.parm.setup.phone, "0");
+ }
+ else {
+ strcpy(ictl.parm.setup.phone, cbdata->data.setup.CallingPN);
+ }
+ if (cbdata->data.setup.CalledPN == NULL) {
+ printk(KERN_DEBUG "NULL CalledPN to eazmsn; using 0\n");
+ strcpy(ictl.parm.setup.eazmsn, "0");
+ }
+ else {
+ strcpy(ictl.parm.setup.eazmsn, cbdata->data.setup.CalledPN);
+ }
+ ictl.parm.setup.si1 = 7;
+ ictl.parm.setup.si2 = 0;
+ ictl.parm.setup.plan = 0;
+ ictl.parm.setup.screen = 0;
+
+#ifdef DEBUG
+ printk(KERN_DEBUG "statstr: %s\n", ictl.num);
+#endif
+
+ dev->dev_if->statcallb(&ictl);
+
+
+ if ((len = capi_conn_resp(chan, &skb)) < 0) {
+ printk(KERN_DEBUG "capi_conn_resp failed\n");
+ return;
+ }
+
+ refnum = last_ref_num++ & 0x7fffU;
+ chan->s_refnum = refnum;
+
+ pcbit_l2_write(dev, MSG_CONN_RESP, refnum, skb, len);
+}
+
+/*
+ * user has replied
+ * open the channel
+ * send CONNECT message CONNECT_ACTIVE_REQ in CAPI
+ */
+
+void cb_in_2(struct pcbit_dev *dev, struct pcbit_chan *chan,
+ struct callb_data *data)
+{
+ unsigned short refnum;
+ struct sk_buff *skb;
+ int len;
+
+ if ((len = capi_conn_active_req(chan, &skb)) < 0) {
+ printk(KERN_DEBUG "capi_conn_active_req failed\n");
+ return;
+ }
+
+
+ refnum = last_ref_num++ & 0x7fffU;
+ chan->s_refnum = refnum;
+
+ printk(KERN_DEBUG "sending MSG_CONN_ACTV_REQ\n");
+ pcbit_l2_write(dev, MSG_CONN_ACTV_REQ, refnum, skb, len);
+}
+
+/*
+ * CONN_ACK arrived
+ * start b-proto selection
+ *
+ */
+
+void cb_in_3(struct pcbit_dev *dev, struct pcbit_chan *chan,
+ struct callb_data *data)
+{
+ unsigned short refnum;
+ struct sk_buff *skb;
+ int len;
+
+ if ((len = capi_select_proto_req(chan, &skb, 0 /*incoming*/)) < 0)
+ {
+ printk("capi_select_proto_req failed\n");
+ return;
+ }
+
+ refnum = last_ref_num++ & 0x7fffU;
+ chan->s_refnum = refnum;
+
+ pcbit_l2_write(dev, MSG_SELP_REQ, refnum, skb, len);
+
+}
+
+
+/*
+ * Received disconnect ind on active state
+ * send disconnect resp
+ * send msg to user
+ */
+void cb_disc_1(struct pcbit_dev *dev, struct pcbit_chan *chan,
+ struct callb_data *data)
+{
+ struct sk_buff *skb;
+ int len;
+ ushort refnum;
+ isdn_ctrl ictl;
+
+ if ((len = capi_disc_resp(chan, &skb)) < 0) {
+ printk("capi_disc_resp failed\n");
+ return;
+ }
+
+ refnum = last_ref_num++ & 0x7fffU;
+ chan->s_refnum = refnum;
+
+ pcbit_l2_write(dev, MSG_DISC_RESP, refnum, skb, len);
+
+ ictl.command = ISDN_STAT_BHUP;
+ ictl.driver = dev->id;
+ ictl.arg = chan->id;
+ dev->dev_if->statcallb(&ictl);
+}
+
+
+/*
+ * User HANGUP on active/call proceeding state
+ * send disc.req
+ */
+void cb_disc_2(struct pcbit_dev *dev, struct pcbit_chan *chan,
+ struct callb_data *data)
+{
+ struct sk_buff *skb;
+ int len;
+ ushort refnum;
+
+ if ((len = capi_disc_req(chan->callref, &skb, CAUSE_NORMAL)) < 0)
+ {
+ printk("capi_disc_req failed\n");
+ return;
+ }
+
+ refnum = last_ref_num++ & 0x7fffU;
+ chan->s_refnum = refnum;
+
+ pcbit_l2_write(dev, MSG_DISC_REQ, refnum, skb, len);
+}
+
+/*
+ * Disc confirm received send BHUP
+ * Problem: when the HL driver sends the disc req itself
+ * LL receives BHUP
+ */
+void cb_disc_3(struct pcbit_dev *dev, struct pcbit_chan *chan,
+ struct callb_data *data)
+{
+ isdn_ctrl ictl;
+
+ ictl.command = ISDN_STAT_BHUP;
+ ictl.driver = dev->id;
+ ictl.arg = chan->id;
+ dev->dev_if->statcallb(&ictl);
+}
+
+void cb_notdone(struct pcbit_dev *dev, struct pcbit_chan *chan,
+ struct callb_data *data)
+{
+}
+
+/*
+ * send activate b-chan protocol
+ */
+void cb_selp_1(struct pcbit_dev *dev, struct pcbit_chan *chan,
+ struct callb_data *data)
+{
+ struct sk_buff *skb;
+ int len;
+ ushort refnum;
+
+ if ((len = capi_activate_transp_req(chan, &skb)) < 0)
+ {
+ printk("capi_conn_activate_transp_req failed\n");
+ return;
+ }
+
+ refnum = last_ref_num++ & 0x7fffU;
+ chan->s_refnum = refnum;
+
+ pcbit_l2_write(dev, MSG_ACT_TRANSP_REQ, refnum, skb, len);
+}
+
+/*
+ * Inform User that the B-channel is available
+ */
+void cb_open(struct pcbit_dev *dev, struct pcbit_chan *chan,
+ struct callb_data *data)
+{
+ isdn_ctrl ictl;
+
+ ictl.command = ISDN_STAT_BCONN;
+ ictl.driver = dev->id;
+ ictl.arg = chan->id;
+ dev->dev_if->statcallb(&ictl);
+}
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