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net/lapb/lapb_in.c
17.5 KB
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/* * LAPB release 002 * * This code REQUIRES 2.1.15 or higher/ NET3.038 * * This module: * This module is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. * * History * LAPB 001 Jonathan Naulor Started Coding * LAPB 002 Jonathan Naylor New timer architecture. * 2000-10-29 Henner Eisen lapb_data_indication() return status. */ #include <linux/errno.h> #include <linux/types.h> #include <linux/socket.h> #include <linux/in.h> #include <linux/kernel.h> |
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#include <linux/timer.h> #include <linux/string.h> #include <linux/sockios.h> #include <linux/net.h> #include <linux/inet.h> #include <linux/netdevice.h> #include <linux/skbuff.h> |
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#include <linux/slab.h> |
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#include <net/sock.h>
#include <asm/uaccess.h>
#include <asm/system.h>
#include <linux/fcntl.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <net/lapb.h>
/*
* State machine for state 0, Disconnected State.
* The handling of the timer(s) is in file lapb_timer.c.
*/
static void lapb_state0_machine(struct lapb_cb *lapb, struct sk_buff *skb,
struct lapb_frame *frame)
{
switch (frame->type) {
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case LAPB_SABM: |
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#if LAPB_DEBUG > 1 |
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printk(KERN_DEBUG "lapb: (%p) S0 RX SABM(%d) ", lapb->dev, frame->pf); |
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#endif |
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if (lapb->mode & LAPB_EXTENDED) {
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#if LAPB_DEBUG > 1 |
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printk(KERN_DEBUG "lapb: (%p) S0 TX DM(%d) ", lapb->dev, frame->pf); |
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#endif |
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lapb_send_control(lapb, LAPB_DM, frame->pf,
LAPB_RESPONSE);
} else {
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#if LAPB_DEBUG > 1 |
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printk(KERN_DEBUG "lapb: (%p) S0 TX UA(%d) ", lapb->dev, frame->pf); |
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#endif #if LAPB_DEBUG > 0 |
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printk(KERN_DEBUG "lapb: (%p) S0 -> S3 ", lapb->dev); |
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#endif |
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lapb_send_control(lapb, LAPB_UA, frame->pf, LAPB_RESPONSE); lapb_stop_t1timer(lapb); lapb_stop_t2timer(lapb); lapb->state = LAPB_STATE_3; lapb->condition = 0x00; lapb->n2count = 0; lapb->vs = 0; lapb->vr = 0; lapb->va = 0; lapb_connect_indication(lapb, LAPB_OK); } break; |
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case LAPB_SABME: |
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printk(KERN_DEBUG "lapb: (%p) S0 RX SABME(%d) ", lapb->dev, frame->pf); |
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#endif |
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if (lapb->mode & LAPB_EXTENDED) {
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printk(KERN_DEBUG "lapb: (%p) S0 TX UA(%d) ", lapb->dev, frame->pf); |
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#endif #if LAPB_DEBUG > 0 |
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printk(KERN_DEBUG "lapb: (%p) S0 -> S3 ", lapb->dev); |
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#endif |
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lapb_send_control(lapb, LAPB_UA, frame->pf,
LAPB_RESPONSE);
lapb_stop_t1timer(lapb);
lapb_stop_t2timer(lapb);
lapb->state = LAPB_STATE_3;
lapb->condition = 0x00;
lapb->n2count = 0;
lapb->vs = 0;
lapb->vr = 0;
lapb->va = 0;
lapb_connect_indication(lapb, LAPB_OK);
} else {
#if LAPB_DEBUG > 1
printk(KERN_DEBUG "lapb: (%p) S0 TX DM(%d)
",
lapb->dev, frame->pf);
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#endif |
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lapb_send_control(lapb, LAPB_DM, frame->pf, LAPB_RESPONSE); } break; |
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case LAPB_DISC: |
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printk(KERN_DEBUG "lapb: (%p) S0 RX DISC(%d) ", lapb->dev, frame->pf); printk(KERN_DEBUG "lapb: (%p) S0 TX UA(%d) ", lapb->dev, frame->pf); |
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#endif |
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lapb_send_control(lapb, LAPB_UA, frame->pf, LAPB_RESPONSE); break; |
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default: break; |
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}
kfree_skb(skb);
}
/*
* State machine for state 1, Awaiting Connection State.
* The handling of the timer(s) is in file lapb_timer.c.
*/
static void lapb_state1_machine(struct lapb_cb *lapb, struct sk_buff *skb,
struct lapb_frame *frame)
{
switch (frame->type) {
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case LAPB_SABM: |
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printk(KERN_DEBUG "lapb: (%p) S1 RX SABM(%d) ", lapb->dev, frame->pf); |
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#endif |
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if (lapb->mode & LAPB_EXTENDED) {
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printk(KERN_DEBUG "lapb: (%p) S1 TX DM(%d) ", lapb->dev, frame->pf); |
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#endif |
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lapb_send_control(lapb, LAPB_DM, frame->pf,
LAPB_RESPONSE);
} else {
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printk(KERN_DEBUG "lapb: (%p) S1 TX UA(%d) ", |
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lapb->dev, frame->pf); #endif |
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lapb_send_control(lapb, LAPB_UA, frame->pf, LAPB_RESPONSE); } break; case LAPB_SABME: |
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#if LAPB_DEBUG > 1 |
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printk(KERN_DEBUG "lapb: (%p) S1 RX SABME(%d) ", lapb->dev, frame->pf); |
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#endif |
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if (lapb->mode & LAPB_EXTENDED) {
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printk(KERN_DEBUG "lapb: (%p) S1 TX UA(%d) ", lapb->dev, frame->pf); |
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#endif |
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lapb_send_control(lapb, LAPB_UA, frame->pf,
LAPB_RESPONSE);
} else {
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#if LAPB_DEBUG > 1 |
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printk(KERN_DEBUG "lapb: (%p) S1 TX DM(%d) ", lapb->dev, frame->pf); #endif lapb_send_control(lapb, LAPB_DM, frame->pf, LAPB_RESPONSE); |
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} break; |
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case LAPB_DISC: |
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#if LAPB_DEBUG > 1 |
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printk(KERN_DEBUG "lapb: (%p) S1 RX DISC(%d) ", lapb->dev, frame->pf); printk(KERN_DEBUG "lapb: (%p) S1 TX DM(%d) ", lapb->dev, frame->pf); |
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#endif |
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lapb_send_control(lapb, LAPB_DM, frame->pf, LAPB_RESPONSE); break; |
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case LAPB_UA: |
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printk(KERN_DEBUG "lapb: (%p) S1 RX UA(%d) ", lapb->dev, frame->pf); |
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#endif |
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if (frame->pf) {
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#if LAPB_DEBUG > 0 |
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printk(KERN_DEBUG "lapb: (%p) S1 -> S3
", lapb->dev);
#endif
lapb_stop_t1timer(lapb);
lapb_stop_t2timer(lapb);
lapb->state = LAPB_STATE_3;
lapb->condition = 0x00;
lapb->n2count = 0;
lapb->vs = 0;
lapb->vr = 0;
lapb->va = 0;
lapb_connect_confirmation(lapb, LAPB_OK);
}
break;
case LAPB_DM:
#if LAPB_DEBUG > 1
printk(KERN_DEBUG "lapb: (%p) S1 RX DM(%d)
",
lapb->dev, frame->pf);
#endif
if (frame->pf) {
#if LAPB_DEBUG > 0
printk(KERN_DEBUG "lapb: (%p) S1 -> S0
", lapb->dev);
#endif
lapb_clear_queues(lapb);
lapb->state = LAPB_STATE_0;
lapb_start_t1timer(lapb);
lapb_stop_t2timer(lapb);
lapb_disconnect_indication(lapb, LAPB_REFUSED);
}
break;
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}
kfree_skb(skb);
}
/*
* State machine for state 2, Awaiting Release State.
* The handling of the timer(s) is in file lapb_timer.c
*/
static void lapb_state2_machine(struct lapb_cb *lapb, struct sk_buff *skb,
struct lapb_frame *frame)
{
switch (frame->type) {
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case LAPB_SABM: case LAPB_SABME: |
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#if LAPB_DEBUG > 1 |
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printk(KERN_DEBUG "lapb: (%p) S2 RX {SABM,SABME}(%d)
",
lapb->dev, frame->pf);
printk(KERN_DEBUG "lapb: (%p) S2 TX DM(%d)
",
lapb->dev, frame->pf);
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#endif |
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lapb_send_control(lapb, LAPB_DM, frame->pf, LAPB_RESPONSE); break; |
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case LAPB_DISC: |
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#if LAPB_DEBUG > 1 |
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printk(KERN_DEBUG "lapb: (%p) S2 RX DISC(%d) ", lapb->dev, frame->pf); printk(KERN_DEBUG "lapb: (%p) S2 TX UA(%d) ", lapb->dev, frame->pf); |
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#endif |
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lapb_send_control(lapb, LAPB_UA, frame->pf, LAPB_RESPONSE); break; |
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case LAPB_UA: |
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printk(KERN_DEBUG "lapb: (%p) S2 RX UA(%d) ", lapb->dev, frame->pf); |
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#endif |
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if (frame->pf) {
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printk(KERN_DEBUG "lapb: (%p) S2 -> S0 ", lapb->dev); |
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#endif |
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lapb->state = LAPB_STATE_0; lapb_start_t1timer(lapb); lapb_stop_t2timer(lapb); lapb_disconnect_confirmation(lapb, LAPB_OK); } break; |
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case LAPB_DM: |
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printk(KERN_DEBUG "lapb: (%p) S2 RX DM(%d) ", lapb->dev, frame->pf); |
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#endif |
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if (frame->pf) {
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printk(KERN_DEBUG "lapb: (%p) S2 -> S0 ", lapb->dev); #endif lapb->state = LAPB_STATE_0; lapb_start_t1timer(lapb); lapb_stop_t2timer(lapb); lapb_disconnect_confirmation(lapb, LAPB_NOTCONNECTED); } break; |
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case LAPB_I: case LAPB_REJ: case LAPB_RNR: case LAPB_RR: |
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#if LAPB_DEBUG > 1 |
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printk(KERN_DEBUG "lapb: (%p) S2 RX {I,REJ,RNR,RR}(%d)
",
lapb->dev, frame->pf);
printk(KERN_DEBUG "lapb: (%p) S2 RX DM(%d)
",
lapb->dev, frame->pf);
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#endif |
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if (frame->pf) lapb_send_control(lapb, LAPB_DM, frame->pf, LAPB_RESPONSE); break; |
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}
kfree_skb(skb);
}
/*
* State machine for state 3, Connected State.
* The handling of the timer(s) is in file lapb_timer.c
*/
static void lapb_state3_machine(struct lapb_cb *lapb, struct sk_buff *skb,
struct lapb_frame *frame)
{
int queued = 0;
int modulus = (lapb->mode & LAPB_EXTENDED) ? LAPB_EMODULUS :
LAPB_SMODULUS;
switch (frame->type) {
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case LAPB_SABM: |
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#if LAPB_DEBUG > 1 |
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printk(KERN_DEBUG "lapb: (%p) S3 RX SABM(%d) ", lapb->dev, frame->pf); |
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#endif |
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if (lapb->mode & LAPB_EXTENDED) {
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printk(KERN_DEBUG "lapb: (%p) S3 TX DM(%d) ", lapb->dev, frame->pf); |
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#endif |
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lapb_send_control(lapb, LAPB_DM, frame->pf,
LAPB_RESPONSE);
} else {
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#if LAPB_DEBUG > 1 |
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printk(KERN_DEBUG "lapb: (%p) S3 TX UA(%d) ", lapb->dev, frame->pf); |
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#endif |
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lapb_send_control(lapb, LAPB_UA, frame->pf, LAPB_RESPONSE); lapb_stop_t1timer(lapb); lapb_stop_t2timer(lapb); lapb->condition = 0x00; lapb->n2count = 0; lapb->vs = 0; lapb->vr = 0; lapb->va = 0; lapb_requeue_frames(lapb); } break; |
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case LAPB_SABME: |
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#if LAPB_DEBUG > 1 |
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printk(KERN_DEBUG "lapb: (%p) S3 RX SABME(%d) ", lapb->dev, frame->pf); |
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#endif |
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if (lapb->mode & LAPB_EXTENDED) {
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#if LAPB_DEBUG > 1 |
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printk(KERN_DEBUG "lapb: (%p) S3 TX UA(%d) ", lapb->dev, frame->pf); |
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|
404 |
#endif |
|
fcb261f35
lapb: Reduce swit...
|
405 406 407 408 409 410 411 412 413 414 415 |
lapb_send_control(lapb, LAPB_UA, frame->pf,
LAPB_RESPONSE);
lapb_stop_t1timer(lapb);
lapb_stop_t2timer(lapb);
lapb->condition = 0x00;
lapb->n2count = 0;
lapb->vs = 0;
lapb->vr = 0;
lapb->va = 0;
lapb_requeue_frames(lapb);
} else {
|
|
1da177e4c
Linux-2.6.12-rc2
|
416 |
#if LAPB_DEBUG > 1 |
|
fcb261f35
lapb: Reduce swit...
|
417 418 419 |
printk(KERN_DEBUG "lapb: (%p) S3 TX DM(%d) ", lapb->dev, frame->pf); |
|
1da177e4c
Linux-2.6.12-rc2
|
420 |
#endif |
|
fcb261f35
lapb: Reduce swit...
|
421 422 423 424 |
lapb_send_control(lapb, LAPB_DM, frame->pf, LAPB_RESPONSE); } break; |
|
1da177e4c
Linux-2.6.12-rc2
|
425 |
|
|
fcb261f35
lapb: Reduce swit...
|
426 |
case LAPB_DISC: |
|
1da177e4c
Linux-2.6.12-rc2
|
427 |
#if LAPB_DEBUG > 1 |
|
fcb261f35
lapb: Reduce swit...
|
428 429 430 |
printk(KERN_DEBUG "lapb: (%p) S3 RX DISC(%d) ", lapb->dev, frame->pf); |
|
1da177e4c
Linux-2.6.12-rc2
|
431 432 |
#endif #if LAPB_DEBUG > 0 |
|
fcb261f35
lapb: Reduce swit...
|
433 434 |
printk(KERN_DEBUG "lapb: (%p) S3 -> S0 ", lapb->dev); |
|
1da177e4c
Linux-2.6.12-rc2
|
435 |
#endif |
|
fcb261f35
lapb: Reduce swit...
|
436 437 438 439 440 441 442 |
lapb_clear_queues(lapb); lapb_send_control(lapb, LAPB_UA, frame->pf, LAPB_RESPONSE); lapb_start_t1timer(lapb); lapb_stop_t2timer(lapb); lapb->state = LAPB_STATE_0; lapb_disconnect_indication(lapb, LAPB_OK); break; |
|
1da177e4c
Linux-2.6.12-rc2
|
443 |
|
|
fcb261f35
lapb: Reduce swit...
|
444 |
case LAPB_DM: |
|
1da177e4c
Linux-2.6.12-rc2
|
445 |
#if LAPB_DEBUG > 1 |
|
fcb261f35
lapb: Reduce swit...
|
446 447 448 |
printk(KERN_DEBUG "lapb: (%p) S3 RX DM(%d) ", lapb->dev, frame->pf); |
|
1da177e4c
Linux-2.6.12-rc2
|
449 450 |
#endif #if LAPB_DEBUG > 0 |
|
fcb261f35
lapb: Reduce swit...
|
451 452 |
printk(KERN_DEBUG "lapb: (%p) S3 -> S0 ", lapb->dev); |
|
1da177e4c
Linux-2.6.12-rc2
|
453 |
#endif |
|
fcb261f35
lapb: Reduce swit...
|
454 455 456 457 458 459 |
lapb_clear_queues(lapb); lapb->state = LAPB_STATE_0; lapb_start_t1timer(lapb); lapb_stop_t2timer(lapb); lapb_disconnect_indication(lapb, LAPB_NOTCONNECTED); break; |
|
1da177e4c
Linux-2.6.12-rc2
|
460 |
|
|
fcb261f35
lapb: Reduce swit...
|
461 |
case LAPB_RNR: |
|
1da177e4c
Linux-2.6.12-rc2
|
462 |
#if LAPB_DEBUG > 1 |
|
fcb261f35
lapb: Reduce swit...
|
463 464 465 |
printk(KERN_DEBUG "lapb: (%p) S3 RX RNR(%d) R%d ", lapb->dev, frame->pf, frame->nr); |
|
1da177e4c
Linux-2.6.12-rc2
|
466 |
#endif |
|
fcb261f35
lapb: Reduce swit...
|
467 468 469 470 471 472 473 474 |
lapb->condition |= LAPB_PEER_RX_BUSY_CONDITION;
lapb_check_need_response(lapb, frame->cr, frame->pf);
if (lapb_validate_nr(lapb, frame->nr)) {
lapb_check_iframes_acked(lapb, frame->nr);
} else {
lapb->frmr_data = *frame;
lapb->frmr_type = LAPB_FRMR_Z;
lapb_transmit_frmr(lapb);
|
|
1da177e4c
Linux-2.6.12-rc2
|
475 |
#if LAPB_DEBUG > 0 |
|
fcb261f35
lapb: Reduce swit...
|
476 477 |
printk(KERN_DEBUG "lapb: (%p) S3 -> S4 ", lapb->dev); |
|
1da177e4c
Linux-2.6.12-rc2
|
478 |
#endif |
|
fcb261f35
lapb: Reduce swit...
|
479 480 481 482 483 484 |
lapb_start_t1timer(lapb); lapb_stop_t2timer(lapb); lapb->state = LAPB_STATE_4; lapb->n2count = 0; } break; |
|
1da177e4c
Linux-2.6.12-rc2
|
485 |
|
|
fcb261f35
lapb: Reduce swit...
|
486 |
case LAPB_RR: |
|
1da177e4c
Linux-2.6.12-rc2
|
487 |
#if LAPB_DEBUG > 1 |
|
fcb261f35
lapb: Reduce swit...
|
488 489 490 |
printk(KERN_DEBUG "lapb: (%p) S3 RX RR(%d) R%d ", lapb->dev, frame->pf, frame->nr); |
|
1da177e4c
Linux-2.6.12-rc2
|
491 |
#endif |
|
fcb261f35
lapb: Reduce swit...
|
492 493 494 495 496 497 498 499 |
lapb->condition &= ~LAPB_PEER_RX_BUSY_CONDITION;
lapb_check_need_response(lapb, frame->cr, frame->pf);
if (lapb_validate_nr(lapb, frame->nr)) {
lapb_check_iframes_acked(lapb, frame->nr);
} else {
lapb->frmr_data = *frame;
lapb->frmr_type = LAPB_FRMR_Z;
lapb_transmit_frmr(lapb);
|
|
1da177e4c
Linux-2.6.12-rc2
|
500 |
#if LAPB_DEBUG > 0 |
|
fcb261f35
lapb: Reduce swit...
|
501 502 |
printk(KERN_DEBUG "lapb: (%p) S3 -> S4 ", lapb->dev); |
|
1da177e4c
Linux-2.6.12-rc2
|
503 |
#endif |
|
fcb261f35
lapb: Reduce swit...
|
504 505 506 507 508 509 |
lapb_start_t1timer(lapb); lapb_stop_t2timer(lapb); lapb->state = LAPB_STATE_4; lapb->n2count = 0; } break; |
|
1da177e4c
Linux-2.6.12-rc2
|
510 |
|
|
fcb261f35
lapb: Reduce swit...
|
511 |
case LAPB_REJ: |
|
1da177e4c
Linux-2.6.12-rc2
|
512 |
#if LAPB_DEBUG > 1 |
|
fcb261f35
lapb: Reduce swit...
|
513 514 515 |
printk(KERN_DEBUG "lapb: (%p) S3 RX REJ(%d) R%d ", lapb->dev, frame->pf, frame->nr); |
|
1da177e4c
Linux-2.6.12-rc2
|
516 |
#endif |
|
fcb261f35
lapb: Reduce swit...
|
517 518 519 520 521 522 523 524 525 526 527 |
lapb->condition &= ~LAPB_PEER_RX_BUSY_CONDITION;
lapb_check_need_response(lapb, frame->cr, frame->pf);
if (lapb_validate_nr(lapb, frame->nr)) {
lapb_frames_acked(lapb, frame->nr);
lapb_stop_t1timer(lapb);
lapb->n2count = 0;
lapb_requeue_frames(lapb);
} else {
lapb->frmr_data = *frame;
lapb->frmr_type = LAPB_FRMR_Z;
lapb_transmit_frmr(lapb);
|
|
1da177e4c
Linux-2.6.12-rc2
|
528 |
#if LAPB_DEBUG > 0 |
|
fcb261f35
lapb: Reduce swit...
|
529 530 |
printk(KERN_DEBUG "lapb: (%p) S3 -> S4 ", lapb->dev); |
|
1da177e4c
Linux-2.6.12-rc2
|
531 |
#endif |
|
fcb261f35
lapb: Reduce swit...
|
532 533 534 535 536 537 |
lapb_start_t1timer(lapb); lapb_stop_t2timer(lapb); lapb->state = LAPB_STATE_4; lapb->n2count = 0; } break; |
|
1da177e4c
Linux-2.6.12-rc2
|
538 |
|
|
fcb261f35
lapb: Reduce swit...
|
539 |
case LAPB_I: |
|
1da177e4c
Linux-2.6.12-rc2
|
540 |
#if LAPB_DEBUG > 1 |
|
fcb261f35
lapb: Reduce swit...
|
541 542 543 |
printk(KERN_DEBUG "lapb: (%p) S3 RX I(%d) S%d R%d ", lapb->dev, frame->pf, frame->ns, frame->nr); |
|
1da177e4c
Linux-2.6.12-rc2
|
544 |
#endif |
|
fcb261f35
lapb: Reduce swit...
|
545 546 547 548 |
if (!lapb_validate_nr(lapb, frame->nr)) {
lapb->frmr_data = *frame;
lapb->frmr_type = LAPB_FRMR_Z;
lapb_transmit_frmr(lapb);
|
|
1da177e4c
Linux-2.6.12-rc2
|
549 |
#if LAPB_DEBUG > 0 |
|
fcb261f35
lapb: Reduce swit...
|
550 551 |
printk(KERN_DEBUG "lapb: (%p) S3 -> S4 ", lapb->dev); |
|
1da177e4c
Linux-2.6.12-rc2
|
552 |
#endif |
|
fcb261f35
lapb: Reduce swit...
|
553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 |
lapb_start_t1timer(lapb);
lapb_stop_t2timer(lapb);
lapb->state = LAPB_STATE_4;
lapb->n2count = 0;
break;
}
if (lapb->condition & LAPB_PEER_RX_BUSY_CONDITION)
lapb_frames_acked(lapb, frame->nr);
else
lapb_check_iframes_acked(lapb, frame->nr);
if (frame->ns == lapb->vr) {
int cn;
cn = lapb_data_indication(lapb, skb);
queued = 1;
/*
* If upper layer has dropped the frame, we
* basically ignore any further protocol
* processing. This will cause the peer
* to re-transmit the frame later like
* a frame lost on the wire.
*/
if (cn == NET_RX_DROP) {
printk(KERN_DEBUG "LAPB: rx congestion
");
|
|
1da177e4c
Linux-2.6.12-rc2
|
578 579 |
break; } |
|
fcb261f35
lapb: Reduce swit...
|
580 581 582 583 584 585 586 587 588 |
lapb->vr = (lapb->vr + 1) % modulus;
lapb->condition &= ~LAPB_REJECT_CONDITION;
if (frame->pf)
lapb_enquiry_response(lapb);
else {
if (!(lapb->condition &
LAPB_ACK_PENDING_CONDITION)) {
lapb->condition |= LAPB_ACK_PENDING_CONDITION;
lapb_start_t2timer(lapb);
|
|
1da177e4c
Linux-2.6.12-rc2
|
589 |
} |
|
fcb261f35
lapb: Reduce swit...
|
590 591 592 |
}
} else {
if (lapb->condition & LAPB_REJECT_CONDITION) {
|
|
1da177e4c
Linux-2.6.12-rc2
|
593 594 |
if (frame->pf) lapb_enquiry_response(lapb); |
|
1da177e4c
Linux-2.6.12-rc2
|
595 |
} else {
|
|
fcb261f35
lapb: Reduce swit...
|
596 597 598 599 600 601 602 603 604 605 |
#if LAPB_DEBUG > 1 printk(KERN_DEBUG "lapb: (%p) S3 TX REJ(%d) R%d ", lapb->dev, frame->pf, lapb->vr); #endif lapb->condition |= LAPB_REJECT_CONDITION; lapb_send_control(lapb, LAPB_REJ, frame->pf, LAPB_RESPONSE); lapb->condition &= ~LAPB_ACK_PENDING_CONDITION; |
|
1da177e4c
Linux-2.6.12-rc2
|
606 |
} |
|
fcb261f35
lapb: Reduce swit...
|
607 608 |
} break; |
|
1da177e4c
Linux-2.6.12-rc2
|
609 |
|
|
fcb261f35
lapb: Reduce swit...
|
610 |
case LAPB_FRMR: |
|
1da177e4c
Linux-2.6.12-rc2
|
611 |
#if LAPB_DEBUG > 1 |
|
fcb261f35
lapb: Reduce swit...
|
612 613 614 615 616 |
printk(KERN_DEBUG "lapb: (%p) S3 RX FRMR(%d) %02X " "%02X %02X %02X %02X ", lapb->dev, frame->pf, skb->data[0], skb->data[1], skb->data[2], skb->data[3], skb->data[4]); |
|
1da177e4c
Linux-2.6.12-rc2
|
617 |
#endif |
|
fcb261f35
lapb: Reduce swit...
|
618 |
lapb_establish_data_link(lapb); |
|
1da177e4c
Linux-2.6.12-rc2
|
619 |
#if LAPB_DEBUG > 0 |
|
fcb261f35
lapb: Reduce swit...
|
620 621 |
printk(KERN_DEBUG "lapb: (%p) S3 -> S1 ", lapb->dev); |
|
1da177e4c
Linux-2.6.12-rc2
|
622 |
#endif |
|
fcb261f35
lapb: Reduce swit...
|
623 624 625 |
lapb_requeue_frames(lapb); lapb->state = LAPB_STATE_1; break; |
|
1da177e4c
Linux-2.6.12-rc2
|
626 |
|
|
fcb261f35
lapb: Reduce swit...
|
627 |
case LAPB_ILLEGAL: |
|
1da177e4c
Linux-2.6.12-rc2
|
628 |
#if LAPB_DEBUG > 1 |
|
fcb261f35
lapb: Reduce swit...
|
629 630 631 |
printk(KERN_DEBUG "lapb: (%p) S3 RX ILLEGAL(%d) ", lapb->dev, frame->pf); |
|
1da177e4c
Linux-2.6.12-rc2
|
632 |
#endif |
|
fcb261f35
lapb: Reduce swit...
|
633 634 635 |
lapb->frmr_data = *frame; lapb->frmr_type = LAPB_FRMR_W; lapb_transmit_frmr(lapb); |
|
1da177e4c
Linux-2.6.12-rc2
|
636 |
#if LAPB_DEBUG > 0 |
|
fcb261f35
lapb: Reduce swit...
|
637 638 |
printk(KERN_DEBUG "lapb: (%p) S3 -> S4 ", lapb->dev); |
|
1da177e4c
Linux-2.6.12-rc2
|
639 |
#endif |
|
fcb261f35
lapb: Reduce swit...
|
640 641 642 643 644 |
lapb_start_t1timer(lapb); lapb_stop_t2timer(lapb); lapb->state = LAPB_STATE_4; lapb->n2count = 0; break; |
|
1da177e4c
Linux-2.6.12-rc2
|
645 646 647 648 649 650 651 652 653 654 655 656 657 658 |
}
if (!queued)
kfree_skb(skb);
}
/*
* State machine for state 4, Frame Reject State.
* The handling of the timer(s) is in file lapb_timer.c.
*/
static void lapb_state4_machine(struct lapb_cb *lapb, struct sk_buff *skb,
struct lapb_frame *frame)
{
switch (frame->type) {
|
|
fcb261f35
lapb: Reduce swit...
|
659 |
case LAPB_SABM: |
|
1da177e4c
Linux-2.6.12-rc2
|
660 |
#if LAPB_DEBUG > 1 |
|
fcb261f35
lapb: Reduce swit...
|
661 662 663 |
printk(KERN_DEBUG "lapb: (%p) S4 RX SABM(%d) ", lapb->dev, frame->pf); |
|
1da177e4c
Linux-2.6.12-rc2
|
664 |
#endif |
|
fcb261f35
lapb: Reduce swit...
|
665 |
if (lapb->mode & LAPB_EXTENDED) {
|
|
1da177e4c
Linux-2.6.12-rc2
|
666 |
#if LAPB_DEBUG > 1 |
|
fcb261f35
lapb: Reduce swit...
|
667 668 669 |
printk(KERN_DEBUG "lapb: (%p) S4 TX DM(%d) ", lapb->dev, frame->pf); |
|
1da177e4c
Linux-2.6.12-rc2
|
670 |
#endif |
|
fcb261f35
lapb: Reduce swit...
|
671 672 673 |
lapb_send_control(lapb, LAPB_DM, frame->pf,
LAPB_RESPONSE);
} else {
|
|
1da177e4c
Linux-2.6.12-rc2
|
674 |
#if LAPB_DEBUG > 1 |
|
fcb261f35
lapb: Reduce swit...
|
675 676 677 |
printk(KERN_DEBUG "lapb: (%p) S4 TX UA(%d) ", lapb->dev, frame->pf); |
|
1da177e4c
Linux-2.6.12-rc2
|
678 679 |
#endif #if LAPB_DEBUG > 0 |
|
fcb261f35
lapb: Reduce swit...
|
680 681 |
printk(KERN_DEBUG "lapb: (%p) S4 -> S3 ", lapb->dev); |
|
1da177e4c
Linux-2.6.12-rc2
|
682 |
#endif |
|
fcb261f35
lapb: Reduce swit...
|
683 684 685 686 687 688 689 690 691 692 693 694 695 |
lapb_send_control(lapb, LAPB_UA, frame->pf, LAPB_RESPONSE); lapb_stop_t1timer(lapb); lapb_stop_t2timer(lapb); lapb->state = LAPB_STATE_3; lapb->condition = 0x00; lapb->n2count = 0; lapb->vs = 0; lapb->vr = 0; lapb->va = 0; lapb_connect_indication(lapb, LAPB_OK); } break; |
|
1da177e4c
Linux-2.6.12-rc2
|
696 |
|
|
fcb261f35
lapb: Reduce swit...
|
697 |
case LAPB_SABME: |
|
1da177e4c
Linux-2.6.12-rc2
|
698 |
#if LAPB_DEBUG > 1 |
|
fcb261f35
lapb: Reduce swit...
|
699 700 701 |
printk(KERN_DEBUG "lapb: (%p) S4 RX SABME(%d) ", lapb->dev, frame->pf); |
|
1da177e4c
Linux-2.6.12-rc2
|
702 |
#endif |
|
fcb261f35
lapb: Reduce swit...
|
703 |
if (lapb->mode & LAPB_EXTENDED) {
|
|
1da177e4c
Linux-2.6.12-rc2
|
704 |
#if LAPB_DEBUG > 1 |
|
fcb261f35
lapb: Reduce swit...
|
705 706 707 |
printk(KERN_DEBUG "lapb: (%p) S4 TX UA(%d) ", lapb->dev, frame->pf); |
|
1da177e4c
Linux-2.6.12-rc2
|
708 709 |
#endif #if LAPB_DEBUG > 0 |
|
fcb261f35
lapb: Reduce swit...
|
710 711 |
printk(KERN_DEBUG "lapb: (%p) S4 -> S3 ", lapb->dev); |
|
1da177e4c
Linux-2.6.12-rc2
|
712 |
#endif |
|
fcb261f35
lapb: Reduce swit...
|
713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 |
lapb_send_control(lapb, LAPB_UA, frame->pf,
LAPB_RESPONSE);
lapb_stop_t1timer(lapb);
lapb_stop_t2timer(lapb);
lapb->state = LAPB_STATE_3;
lapb->condition = 0x00;
lapb->n2count = 0;
lapb->vs = 0;
lapb->vr = 0;
lapb->va = 0;
lapb_connect_indication(lapb, LAPB_OK);
} else {
#if LAPB_DEBUG > 1
printk(KERN_DEBUG "lapb: (%p) S4 TX DM(%d)
",
lapb->dev, frame->pf);
|
|
1da177e4c
Linux-2.6.12-rc2
|
729 |
#endif |
|
fcb261f35
lapb: Reduce swit...
|
730 731 732 733 |
lapb_send_control(lapb, LAPB_DM, frame->pf, LAPB_RESPONSE); } break; |
|
1da177e4c
Linux-2.6.12-rc2
|
734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 |
}
kfree_skb(skb);
}
/*
* Process an incoming LAPB frame
*/
void lapb_data_input(struct lapb_cb *lapb, struct sk_buff *skb)
{
struct lapb_frame frame;
if (lapb_decode(lapb, skb, &frame) < 0) {
kfree_skb(skb);
return;
}
switch (lapb->state) {
case LAPB_STATE_0:
lapb_state0_machine(lapb, skb, &frame); break;
case LAPB_STATE_1:
lapb_state1_machine(lapb, skb, &frame); break;
case LAPB_STATE_2:
lapb_state2_machine(lapb, skb, &frame); break;
case LAPB_STATE_3:
lapb_state3_machine(lapb, skb, &frame); break;
case LAPB_STATE_4:
lapb_state4_machine(lapb, skb, &frame); break;
}
lapb_kick(lapb);
}
|