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Commit 2d392056 authored by Kai Germaschewski's avatar Kai Germaschewski
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ISDN: Introduce symbolic names for state machine in isdn_net.c 

Replace the numbers by symbolic constants - doesn't help yet, since
we just go 0 -> ST_0, 1 -> ST_1, ... - but that'll change ;)
parent 93796c1f
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Showing with 74 additions and 55 deletions
drivers/isdn/i4l/isdn_net.c
View file @ 2d392056
......@@ -38,6 +38,21 @@
#include "isdn_concap.h"
#endif
enum {
ST_0,
ST_1,
ST_2,
ST_3,
ST_4,
ST_5,
ST_6,
ST_7,
ST_8,
ST_9,
ST_10,
ST_11,
ST_12,
};
/*
* Outline of new tbusy handling:
......@@ -305,7 +320,7 @@ isdn_net_unbind_channel(isdn_net_local * lp)
*/
qdisc_reset(lp->netdev->dev.qdisc);
}
lp->dialstate = 0;
lp->dialstate = ST_0;
isdn_slot_set_rx_netdev(lp->isdn_slot, NULL);
isdn_slot_set_st_netdev(lp->isdn_slot, NULL);
isdn_slot_free(lp->isdn_slot, ISDN_USAGE_NET);
......@@ -346,7 +361,7 @@ isdn_net_autohup()
l->transcount = 0;
if (dev->net_verbose > 3)
printk(KERN_DEBUG "%s: %d bogocps\n", l->name, l->cps);
if ((l->flags & ISDN_NET_CONNECTED) && (!l->dialstate)) {
if ((l->flags & ISDN_NET_CONNECTED) && (l->dialstate == ST_0)) {
anymore = 1;
l->huptimer++;
/*
......@@ -418,7 +433,7 @@ isdn_net_stat_callback(int idx, isdn_ctrl *c)
case ISDN_STAT_BSENT:
/* A packet has successfully been sent out */
if ((lp->flags & ISDN_NET_CONNECTED) &&
(!lp->dialstate)) {
(lp->dialstate == ST_0)) {
isdn_net_dec_frame_cnt(lp);
lp->stats.tx_packets++;
lp->stats.tx_bytes += c->parm.length;
......@@ -427,13 +442,17 @@ isdn_net_stat_callback(int idx, isdn_ctrl *c)
case ISDN_STAT_DCONN:
/* D-Channel is up */
switch (lp->dialstate) {
case 4:
case 7:
case 8:
lp->dialstate++;
case ST_4:
lp->dialstate = ST_5;
return 1;
case ST_7:
lp->dialstate = ST_8;
return 1;
case ST_8:
lp->dialstate = ST_9;
return 1;
case 12:
lp->dialstate = 5;
lp->dialstate = ST_5;
return 1;
}
break;
......@@ -449,7 +468,7 @@ isdn_net_stat_callback(int idx, isdn_ctrl *c)
&& pops && pops -> disconn_ind )
pops -> disconn_ind(cprot);
#endif /* CONFIG_ISDN_X25 */
if ((!lp->dialstate) && (lp->flags & ISDN_NET_CONNECTED)) {
if ((lp->dialstate == ST_0) && (lp->flags & ISDN_NET_CONNECTED)) {
if (lp->p_encap == ISDN_NET_ENCAP_CISCOHDLCK)
isdn_net_ciscohdlck_disconnected(lp);
#ifdef CONFIG_ISDN_PPP
......@@ -481,18 +500,18 @@ isdn_net_stat_callback(int idx, isdn_ctrl *c)
/* B-Channel is up */
isdn_net_zero_frame_cnt(lp);
switch (lp->dialstate) {
case 5:
case 6:
case 7:
case 8:
case 9:
case 10:
case 12:
if (lp->dialstate <= 6)
case ST_5:
case ST_6:
case ST_7:
case ST_8:
case ST_9:
case ST_10:
case ST_12:
if (lp->dialstate == ST_5 || lp->dialstate == ST_6)
isdn_slot_set_usage(idx, isdn_slot_usage(idx) | ISDN_USAGE_OUTGOING);
else
isdn_slot_set_rx_netdev(idx, p);
lp->dialstate = 0;
lp->dialstate = ST_0;
isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, 1);
if (lp->p_encap == ISDN_NET_ENCAP_CISCOHDLCK)
isdn_net_ciscohdlck_connected(lp);
......@@ -530,8 +549,8 @@ isdn_net_stat_callback(int idx, isdn_ctrl *c)
break;
case ISDN_STAT_NODCH:
/* No D-Channel avail. */
if (lp->dialstate == 4) {
lp->dialstate--;
if (lp->dialstate == ST_4) {
lp->dialstate = ST_3;
return 1;
}
break;
......@@ -581,7 +600,7 @@ init_dialout(isdn_net_local *lp)
lp->dialstarted = jiffies;
lp->dialwait_timer = 0;
}
lp->dialstate = 2;
lp->dialstate = ST_2;
return 1;
}
......@@ -616,7 +635,7 @@ do_dialout(isdn_net_local *lp)
}
if (!strncmp(lp->dial->num, "LEASED", strlen("LEASED"))) {
restore_flags(flags);
lp->dialstate = 4;
lp->dialstate = ST_4;
printk(KERN_INFO "%s: Open leased line ...\n", lp->name);
} else {
struct dial_info dial = {
......@@ -670,7 +689,7 @@ do_dialout(isdn_net_local *lp)
}
lp->dialstate =
(lp->cbdelay &&
(lp->flags & ISDN_NET_CBOUT)) ? 12 : 4;
(lp->flags & ISDN_NET_CBOUT)) ? ST_12 : ST_4;
return 1;
}
......@@ -699,37 +718,37 @@ isdn_net_dial(void)
printk(KERN_DEBUG "%s: dialstate=%d\n", lp->name, lp->dialstate);
#endif
switch (lp->dialstate) {
case 0:
case ST_0:
/* Nothing to do for this interface */
break;
case 1:
case ST_1:
anymore = init_dialout(lp);
/* Fall through */
case 2:
case ST_2:
lp->dialretry = 0;
anymore = 1;
lp->dialstate++;
lp->dialstate = ST_3;
/* Fall through */
case 3:
case ST_3:
anymore = do_dialout(lp);
break;
case 4:
case ST_4:
/* Wait for D-Channel-connect.
* If timeout, switch back to state 3.
* Dialmax-handling moved to state 3.
*/
if (lp->dtimer++ > ISDN_TIMER_DTIMEOUT10)
lp->dialstate = 3;
lp->dialstate = ST_3;
anymore = 1;
break;
case 5:
case ST_5:
/* Got D-Channel-Connect, send B-Channel-request */
anymore = 1;
lp->dtimer = 0;
lp->dialstate++;
lp->dialstate = ST_6;
isdn_slot_command(lp->isdn_slot, ISDN_CMD_ACCEPTB, &cmd);
break;
case 6:
case ST_6:
/* Wait for B- or D-Channel-connect. If timeout,
* switch back to state 3.
*/
......@@ -737,10 +756,10 @@ isdn_net_dial(void)
printk(KERN_DEBUG "dialtimer2: %d\n", lp->dtimer);
#endif
if (lp->dtimer++ > ISDN_TIMER_DTIMEOUT10)
lp->dialstate = 3;
lp->dialstate = ST_3;
anymore = 1;
break;
case 7:
case ST_7:
/* Got incoming Call, setup L2 and L3 protocols,
* then wait for D-Channel-connect
*/
......@@ -755,18 +774,18 @@ isdn_net_dial(void)
isdn_net_hangup(&p->dev);
else {
anymore = 1;
lp->dialstate++;
lp->dialstate = ST_8;
}
break;
case 9:
case ST_9:
/* Got incoming D-Channel-Connect, send B-Channel-request */
isdn_slot_command(lp->isdn_slot, ISDN_CMD_ACCEPTB, &cmd);
anymore = 1;
lp->dtimer = 0;
lp->dialstate++;
lp->dialstate = ST_10;
break;
case 8:
case 10:
case ST_8:
case ST_10:
/* Wait for B- or D-channel-connect */
#ifdef ISDN_DEBUG_NET_DIAL
printk(KERN_DEBUG "dialtimer4: %d\n", lp->dtimer);
......@@ -776,20 +795,20 @@ isdn_net_dial(void)
else
anymore = 1;
break;
case 11:
case ST_11:
/* Callback Delay */
if (lp->dtimer++ > lp->cbdelay)
lp->dialstate = 1;
lp->dialstate = ST_1;
anymore = 1;
break;
case 12:
case ST_12:
/* Remote does callback. Hangup after cbdelay, then wait for incoming
* call (in state 4).
*/
if (lp->dtimer++ > lp->cbdelay) {
printk(KERN_INFO "%s: hangup waiting for callback ...\n", lp->name);
lp->dtimer = 0;
lp->dialstate = 4;
lp->dialstate = ST_4;
isdn_slot_command(lp->isdn_slot, ISDN_CMD_HANGUP, &cmd);
isdn_slot_all_eaz(lp->isdn_slot);
}
......@@ -1119,7 +1138,7 @@ void isdn_net_tx_timeout(struct net_device * ndev)
isdn_net_local *lp = (isdn_net_local *) ndev->priv;
printk(KERN_WARNING "isdn_tx_timeout dev %s dialstate %d\n", ndev->name, lp->dialstate);
if (!lp->dialstate){
if (lp->dialstate == ST_0){
lp->stats.tx_errors++;
/*
* There is a certain probability that this currently
......@@ -1237,7 +1256,7 @@ isdn_net_start_xmit(struct sk_buff *skb, struct net_device *ndev)
/* Log packet, which triggered dialing */
if (dev->net_verbose)
isdn_net_log_skb(skb, lp);
lp->dialstate = 1;
lp->dialstate = ST_1;
/* Connect interface with channel */
isdn_net_bind_channel(lp, chi);
#ifdef CONFIG_ISDN_PPP
......@@ -1269,7 +1288,7 @@ isdn_net_start_xmit(struct sk_buff *skb, struct net_device *ndev)
} else {
/* Device is connected to an ISDN channel */
ndev->trans_start = jiffies;
if (!lp->dialstate) {
if (lp->dialstate == ST_0) {
/* ISDN connection is established, try sending */
int ret;
ret = (isdn_net_xmit(ndev, skb));
......@@ -1477,7 +1496,7 @@ isdn_net_ciscohdlck_slarp_send_keepalive(unsigned long data)
unsigned long last_cisco_myseq = lp->cisco_myseq;
int myseq_diff = 0;
if (!(lp->flags & ISDN_NET_CONNECTED) || lp->dialstate) {
if (!(lp->flags & ISDN_NET_CONNECTED) || lp->dialstate != ST_0) {
printk("isdn BUG at %s:%d!\n", __FILE__, __LINE__);
return;
}
......@@ -1852,7 +1871,7 @@ isdn_net_rcv_skb(int idx, struct sk_buff *skb)
if (p) {
isdn_net_local *lp = p->local;
if ((lp->flags & ISDN_NET_CONNECTED) &&
(!lp->dialstate)) {
(lp->dialstate == ST_0)) {
isdn_net_receive(&p->dev, skb);
return 1;
}
......@@ -2190,7 +2209,7 @@ p = dev->netdev;
if ((!matchret) && /* EAZ is matching */
(((!(lp->flags & ISDN_NET_CONNECTED)) && /* but not connected */
(USG_NONE(isdn_slot_usage(idx)))) || /* and ch. unused or */
((((lp->dialstate == 4) || (lp->dialstate == 12)) && /* if dialing */
((((lp->dialstate == ST_4) || (lp->dialstate == ST_12)) && /* if dialing */
(!(lp->flags & ISDN_NET_CALLBACK))) /* but no callback */
)))
{
......@@ -2359,7 +2378,7 @@ p = dev->netdev;
}
/* Setup dialstate. */
lp->dtimer = 0;
lp->dialstate = 11;
lp->dialstate = ST_11;
/* Connect interface with channel */
isdn_net_bind_channel(lp, chi);
#ifdef CONFIG_ISDN_PPP
......@@ -2382,7 +2401,7 @@ p = dev->netdev;
eaz);
/* if this interface is dialing, it does it probably on a different
device, so free this device */
if ((lp->dialstate == 4) || (lp->dialstate == 12)) {
if ((lp->dialstate == ST_4) || (lp->dialstate == ST_12)) {
#ifdef CONFIG_ISDN_PPP
if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
isdn_ppp_free(lp);
......@@ -2397,7 +2416,7 @@ p = dev->netdev;
lp->isdn_slot = slot;
lp->ppp_slot = -1;
lp->flags |= ISDN_NET_CONNECTED;
lp->dialstate = 7;
lp->dialstate = ST_7;
lp->dtimer = 0;
lp->outgoing = 0;
lp->huptimer = 0;
......@@ -2449,7 +2468,7 @@ isdn_net_findif(char *name)
int
isdn_net_force_dial_lp(isdn_net_local * lp)
{
if ((!(lp->flags & ISDN_NET_CONNECTED)) && !lp->dialstate) {
if ((!(lp->flags & ISDN_NET_CONNECTED)) && lp->dialstate == ST_0) {
int chi;
if (lp->phone[1]) {
ulong flags;
......@@ -2470,7 +2489,7 @@ isdn_net_force_dial_lp(isdn_net_local * lp)
restore_flags(flags);
return -EAGAIN;
}
lp->dialstate = 1;
lp->dialstate = ST_1;
/* Connect interface with channel */
isdn_net_bind_channel(lp, chi);
#ifdef CONFIG_ISDN_PPP
......
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