comx-proto-fr.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:25k
- /*
- * Frame-relay protocol module for the COMX driver
- * for Linux 2.2.X
- *
- * Original author: Tivadar Szemethy <tiv@itc.hu>
- * Maintainer: Gergely Madarasz <gorgo@itc.hu>
- *
- * Copyright (C) 1998-1999 ITConsult-Pro Co. <info@itc.hu>
- *
- * Contributors:
- * Arnaldo Carvalho de Melo <acme@conectiva.com.br> (0.73)
- *
- * This program 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.
- *
- * Version 0.70 (99/06/14):
- * - cleaned up the source code a bit
- * - ported back to kernel, now works as builtin code
- *
- * Version 0.71 (99/06/25):
- * - use skb priorities and queues for sending keepalive
- * - use device queues for slave->master data transmit
- * - set IFF_RUNNING only line protocol up
- * - fixes on slave device flags
- *
- * Version 0.72 (99/07/09):
- * - handle slave tbusy with master tbusy (should be fixed)
- * - fix the keepalive timer addition/deletion
- *
- * Version 0.73 (00/08/15)
- * - resource release on failure at fr_master_init and
- * fr_slave_init
- */
- #define VERSION "0.73"
- #include <linux/module.h>
- #include <linux/version.h>
- #include <linux/types.h>
- #include <linux/sched.h>
- #include <linux/netdevice.h>
- #include <linux/proc_fs.h>
- #include <linux/if_arp.h>
- #include <linux/inetdevice.h>
- #include <linux/pkt_sched.h>
- #include <linux/init.h>
- #include <asm/uaccess.h>
- #include "comx.h"
- #include "comxhw.h"
- MODULE_AUTHOR("Author: Tivadar Szemethy <tiv@itc.hu>");
- MODULE_DESCRIPTION("Frame Relay protocol implementation for the COMX drivers"
- "for Linux kernel 2.4.X");
- MODULE_LICENSE("GPL");
- #define FRAD_UI 0x03
- #define NLPID_IP 0xcc
- #define NLPID_Q933_LMI 0x08
- #define NLPID_CISCO_LMI 0x09
- #define Q933_ENQ 0x75
- #define Q933_LINESTAT 0x51
- #define Q933_COUNTERS 0x53
- #define MAXALIVECNT 3 /* No. of failures */
- struct fr_data {
- u16 dlci;
- struct net_device *master;
- char keepa_pend;
- char keepa_freq;
- char keepalivecnt, keeploopcnt;
- struct timer_list keepa_timer;
- u8 local_cnt, remote_cnt;
- };
- static struct comx_protocol fr_master_protocol;
- static struct comx_protocol fr_slave_protocol;
- static struct comx_hardware fr_dlci;
- static void fr_keepalive_send(struct net_device *dev)
- {
- struct comx_channel *ch = dev->priv;
- struct fr_data *fr = ch->LINE_privdata;
- struct sk_buff *skb;
- u8 *fr_packet;
-
- skb=alloc_skb(dev->hard_header_len + 13, GFP_ATOMIC);
-
- if(skb==NULL)
- return;
-
- skb_reserve(skb, dev->hard_header_len);
-
- fr_packet=(u8*)skb_put(skb, 13);
-
- fr_packet[0] = (fr->dlci & (1024 - 15)) >> 2;
- fr_packet[1] = (fr->dlci & 15) << 4 | 1; // EA bit 1
- fr_packet[2] = FRAD_UI;
- fr_packet[3] = NLPID_Q933_LMI;
- fr_packet[4] = 0;
- fr_packet[5] = Q933_ENQ;
- fr_packet[6] = Q933_LINESTAT;
- fr_packet[7] = 0x01;
- fr_packet[8] = 0x01;
- fr_packet[9] = Q933_COUNTERS;
- fr_packet[10] = 0x02;
- fr_packet[11] = ++fr->local_cnt;
- fr_packet[12] = fr->remote_cnt;
- skb->dev = dev;
- skb->priority = TC_PRIO_CONTROL;
- dev_queue_xmit(skb);
- }
- static void fr_keepalive_timerfun(unsigned long d)
- {
- struct net_device *dev = (struct net_device *)d;
- struct comx_channel *ch = dev->priv;
- struct fr_data *fr = ch->LINE_privdata;
- struct proc_dir_entry *dir = ch->procdir->parent->subdir;
- struct comx_channel *sch;
- struct fr_data *sfr;
- struct net_device *sdev;
- if (ch->init_status & LINE_OPEN) {
- if (fr->keepalivecnt == MAXALIVECNT) {
- comx_status(dev, ch->line_status & ~PROTO_UP);
- dev->flags &= ~IFF_RUNNING;
- for (; dir ; dir = dir->next) {
- if(!S_ISDIR(dir->mode)) {
- continue;
- }
-
- if ((sdev = dir->data) && (sch = sdev->priv) &&
- (sdev->type == ARPHRD_DLCI) &&
- (sfr = sch->LINE_privdata)
- && (sfr->master == dev) &&
- (sdev->flags & IFF_UP)) {
- sdev->flags &= ~IFF_RUNNING;
- comx_status(sdev,
- sch->line_status & ~PROTO_UP);
- }
- }
- }
- if (fr->keepalivecnt <= MAXALIVECNT) {
- ++fr->keepalivecnt;
- }
- fr_keepalive_send(dev);
- }
- mod_timer(&fr->keepa_timer, jiffies + HZ * fr->keepa_freq);
- }
- static void fr_rx_lmi(struct net_device *dev, struct sk_buff *skb,
- u16 dlci, u8 nlpid)
- {
- struct comx_channel *ch = dev->priv;
- struct fr_data *fr = ch->LINE_privdata;
- struct proc_dir_entry *dir = ch->procdir->parent->subdir;
- struct comx_channel *sch;
- struct fr_data *sfr;
- struct net_device *sdev;
- if (dlci != fr->dlci || nlpid != NLPID_Q933_LMI || !fr->keepa_freq) {
- return;
- }
- fr->remote_cnt = skb->data[7];
- if (skb->data[8] == fr->local_cnt) { // keepalive UP!
- fr->keepalivecnt = 0;
- if ((ch->line_status & LINE_UP) &&
- !(ch->line_status & PROTO_UP)) {
- comx_status(dev, ch->line_status |= PROTO_UP);
- dev->flags |= IFF_RUNNING;
- for (; dir ; dir = dir->next) {
- if(!S_ISDIR(dir->mode)) {
- continue;
- }
-
- if ((sdev = dir->data) && (sch = sdev->priv) &&
- (sdev->type == ARPHRD_DLCI) &&
- (sfr = sch->LINE_privdata)
- && (sfr->master == dev) &&
- (sdev->flags & IFF_UP)) {
- sdev->flags |= IFF_RUNNING;
- comx_status(sdev,
- sch->line_status | PROTO_UP);
- }
- }
- }
- }
- }
- static void fr_set_keepalive(struct net_device *dev, int keepa)
- {
- struct comx_channel *ch = dev->priv;
- struct fr_data *fr = ch->LINE_privdata;
- if (!keepa && fr->keepa_freq) { // switch off
- fr->keepa_freq = 0;
- if (ch->line_status & LINE_UP) {
- comx_status(dev, ch->line_status | PROTO_UP);
- dev->flags |= IFF_RUNNING;
- del_timer(&fr->keepa_timer);
- }
- return;
- }
- if (keepa) { // bekapcs
- if(fr->keepa_freq && (ch->line_status & LINE_UP)) {
- del_timer(&fr->keepa_timer);
- }
- fr->keepa_freq = keepa;
- fr->local_cnt = fr->remote_cnt = 0;
- fr->keepa_timer.expires = jiffies + HZ;
- fr->keepa_timer.function = fr_keepalive_timerfun;
- fr->keepa_timer.data = (unsigned long)dev;
- ch->line_status &= ~(PROTO_UP | PROTO_LOOP);
- dev->flags &= ~IFF_RUNNING;
- comx_status(dev, ch->line_status);
- if(ch->line_status & LINE_UP) {
- add_timer(&fr->keepa_timer);
- }
- }
- }
- static void fr_rx(struct net_device *dev, struct sk_buff *skb)
- {
- struct comx_channel *ch = dev->priv;
- struct proc_dir_entry *dir = ch->procdir->parent->subdir;
- struct net_device *sdev = dev;
- struct comx_channel *sch;
- struct fr_data *sfr;
- u16 dlci;
- u8 nlpid;
- if(skb->len <= 4 || skb->data[2] != FRAD_UI) {
- kfree_skb(skb);
- return;
- }
- /* Itt majd ki kell talalni, melyik slave kapja a csomagot */
- dlci = ((skb->data[0] & 0xfc) << 2) | ((skb->data[1] & 0xf0) >> 4);
- if ((nlpid = skb->data[3]) == 0) { // Optional padding
- nlpid = skb->data[4];
- skb_pull(skb, 1);
- }
- skb_pull(skb, 4); /* DLCI and header throw away */
- if (ch->debug_flags & DEBUG_COMX_DLCI) {
- comx_debug(dev, "Frame received, DLCI: %d, NLPID: 0x%02xn",
- dlci, nlpid);
- comx_debug_skb(dev, skb, "Contents");
- }
- /* Megkeressuk, kihez tartozik */
- for (; dir ; dir = dir->next) {
- if(!S_ISDIR(dir->mode)) {
- continue;
- }
- if ((sdev = dir->data) && (sch = sdev->priv) &&
- (sdev->type == ARPHRD_DLCI) && (sfr = sch->LINE_privdata) &&
- (sfr->master == dev) && (sfr->dlci == dlci)) {
- skb->dev = sdev;
- if (ch->debug_flags & DEBUG_COMX_DLCI) {
- comx_debug(dev, "Passing it to %sn",sdev->name);
- }
- if (dev != sdev) {
- sch->stats.rx_packets++;
- sch->stats.rx_bytes += skb->len;
- }
- break;
- }
- }
- switch(nlpid) {
- case NLPID_IP:
- skb->protocol = htons(ETH_P_IP);
- skb->mac.raw = skb->data;
- comx_rx(sdev, skb);
- break;
- case NLPID_Q933_LMI:
- fr_rx_lmi(dev, skb, dlci, nlpid);
- default:
- kfree_skb(skb);
- break;
- }
- }
- static int fr_tx(struct net_device *dev)
- {
- struct comx_channel *ch = dev->priv;
- struct proc_dir_entry *dir = ch->procdir->parent->subdir;
- struct net_device *sdev;
- struct comx_channel *sch;
- struct fr_data *sfr;
- int cnt = 1;
- /* Ha minden igaz, 2 helyen fog allni a tbusy: a masternel,
- es annal a slave-nel aki eppen kuldott.
- Egy helyen akkor all, ha a master kuldott.
- Ez megint jo lesz majd, ha utemezni akarunk */
-
- /* This should be fixed, the slave tbusy should be set when
- the masters queue is full and reset when not */
- for (; dir ; dir = dir->next) {
- if(!S_ISDIR(dir->mode)) {
- continue;
- }
- if ((sdev = dir->data) && (sch = sdev->priv) &&
- (sdev->type == ARPHRD_DLCI) && (sfr = sch->LINE_privdata) &&
- (sfr->master == dev) && (netif_queue_stopped(sdev))) {
- netif_wake_queue(sdev);
- cnt++;
- }
- }
- netif_wake_queue(dev);
- return 0;
- }
- static void fr_status(struct net_device *dev, unsigned short status)
- {
- struct comx_channel *ch = dev->priv;
- struct fr_data *fr = ch->LINE_privdata;
- struct proc_dir_entry *dir = ch->procdir->parent->subdir;
- struct net_device *sdev;
- struct comx_channel *sch;
- struct fr_data *sfr;
- if (status & LINE_UP) {
- if (!fr->keepa_freq) {
- status |= PROTO_UP;
- }
- } else {
- status &= ~(PROTO_UP | PROTO_LOOP);
- }
- if (dev == fr->master && fr->keepa_freq) {
- if (status & LINE_UP) {
- fr->keepa_timer.expires = jiffies + HZ;
- add_timer(&fr->keepa_timer);
- fr->keepalivecnt = MAXALIVECNT + 1;
- fr->keeploopcnt = 0;
- } else {
- del_timer(&fr->keepa_timer);
- }
- }
-
- /* Itt a status valtozast vegig kell vinni az osszes slave-n */
- for (; dir ; dir = dir->next) {
- if(!S_ISDIR(dir->mode)) {
- continue;
- }
-
- if ((sdev = dir->data) && (sch = sdev->priv) &&
- (sdev->type == ARPHRD_FRAD || sdev->type == ARPHRD_DLCI) &&
- (sfr = sch->LINE_privdata) && (sfr->master == dev)) {
- if(status & LINE_UP) {
- netif_wake_queue(sdev);
- }
- comx_status(sdev, status);
- if(status & (PROTO_UP | PROTO_LOOP)) {
- dev->flags |= IFF_RUNNING;
- } else {
- dev->flags &= ~IFF_RUNNING;
- }
- }
- }
- }
- static int fr_open(struct net_device *dev)
- {
- struct comx_channel *ch = dev->priv;
- struct fr_data *fr = ch->LINE_privdata;
- struct proc_dir_entry *comxdir = ch->procdir;
- struct comx_channel *mch;
- if (!(ch->init_status & HW_OPEN)) {
- return -ENODEV;
- }
- if ((ch->hardware == &fr_dlci && ch->protocol != &fr_slave_protocol) ||
- (ch->protocol == &fr_slave_protocol && ch->hardware != &fr_dlci)) {
- printk(KERN_ERR "Trying to open an improperly set FR interface, giving upn");
- return -EINVAL;
- }
- if (!fr->master) {
- return -ENODEV;
- }
- mch = fr->master->priv;
- if (fr->master != dev && (!(mch->init_status & LINE_OPEN)
- || (mch->protocol != &fr_master_protocol))) {
- printk(KERN_ERR "Master %s is inactive, or incorrectly set up, "
- "unable to open %sn", fr->master->name, dev->name);
- return -ENODEV;
- }
- ch->init_status |= LINE_OPEN;
- ch->line_status &= ~(PROTO_UP | PROTO_LOOP);
- dev->flags &= ~IFF_RUNNING;
- if (fr->master == dev) {
- if (fr->keepa_freq) {
- fr->keepa_timer.function = fr_keepalive_timerfun;
- fr->keepa_timer.data = (unsigned long)dev;
- add_timer(&fr->keepa_timer);
- } else {
- if (ch->line_status & LINE_UP) {
- ch->line_status |= PROTO_UP;
- dev->flags |= IFF_RUNNING;
- }
- }
- } else {
- ch->line_status = mch->line_status;
- if(fr->master->flags & IFF_RUNNING) {
- dev->flags |= IFF_RUNNING;
- }
- }
- for (; comxdir ; comxdir = comxdir->next) {
- if (strcmp(comxdir->name, FILENAME_DLCI) == 0 ||
- strcmp(comxdir->name, FILENAME_MASTER) == 0 ||
- strcmp(comxdir->name, FILENAME_KEEPALIVE) == 0) {
- comxdir->mode = S_IFREG | 0444;
- }
- }
- // comx_status(dev, ch->line_status);
- return 0;
- }
- static int fr_close(struct net_device *dev)
- {
- struct comx_channel *ch = dev->priv;
- struct fr_data *fr = ch->LINE_privdata;
- struct proc_dir_entry *comxdir = ch->procdir;
- if (fr->master == dev) { // Ha master
- struct proc_dir_entry *dir = ch->procdir->parent->subdir;
- struct net_device *sdev = dev;
- struct comx_channel *sch;
- struct fr_data *sfr;
- if (!(ch->init_status & HW_OPEN)) {
- return -ENODEV;
- }
- if (fr->keepa_freq) {
- del_timer(&fr->keepa_timer);
- }
-
- for (; dir ; dir = dir->next) {
- if(!S_ISDIR(dir->mode)) {
- continue;
- }
- if ((sdev = dir->data) && (sch = sdev->priv) &&
- (sdev->type == ARPHRD_DLCI) &&
- (sfr = sch->LINE_privdata) &&
- (sfr->master == dev) &&
- (sch->init_status & LINE_OPEN)) {
- dev_close(sdev);
- }
- }
- }
- ch->init_status &= ~LINE_OPEN;
- ch->line_status &= ~(PROTO_UP | PROTO_LOOP);
- dev->flags &= ~IFF_RUNNING;
- for (; comxdir ; comxdir = comxdir->next) {
- if (strcmp(comxdir->name, FILENAME_DLCI) == 0 ||
- strcmp(comxdir->name, FILENAME_MASTER) == 0 ||
- strcmp(comxdir->name, FILENAME_KEEPALIVE) == 0) {
- comxdir->mode = S_IFREG | 0444;
- }
- }
- return 0;
- }
- static int fr_xmit(struct sk_buff *skb, struct net_device *dev)
- {
- struct comx_channel *ch = dev->priv;
- struct comx_channel *sch, *mch;
- struct fr_data *fr = ch->LINE_privdata;
- struct fr_data *sfr;
- struct net_device *sdev;
- struct proc_dir_entry *dir = ch->procdir->parent->subdir;
- if (!fr->master) {
- printk(KERN_ERR "BUG: fr_xmit without a master!!! dev: %sn", dev->name);
- return 0;
- }
- mch = fr->master->priv;
- /* Ennek majd a slave utemezeskor lesz igazan jelentosege */
- if (ch->debug_flags & DEBUG_COMX_DLCI) {
- comx_debug_skb(dev, skb, "Sending frame");
- }
- if (dev != fr->master) {
- struct sk_buff *newskb=skb_clone(skb, GFP_ATOMIC);
- if (!newskb)
- return -ENOMEM;
- newskb->dev=fr->master;
- dev_queue_xmit(newskb);
- ch->stats.tx_bytes += skb->len;
- ch->stats.tx_packets++;
- dev_kfree_skb(skb);
- } else {
- netif_stop_queue(dev);
- for (; dir ; dir = dir->next) {
- if(!S_ISDIR(dir->mode)) {
- continue;
- }
- if ((sdev = dir->data) && (sch = sdev->priv) &&
- (sdev->type == ARPHRD_DLCI) && (sfr = sch->LINE_privdata) &&
- (sfr->master == dev) && (netif_queue_stopped(sdev))) {
- netif_stop_queue(sdev);
- }
- }
-
- switch(mch->HW_send_packet(dev, skb)) {
- case FRAME_QUEUED:
- netif_wake_queue(dev);
- break;
- case FRAME_ACCEPTED:
- case FRAME_DROPPED:
- break;
- case FRAME_ERROR:
- printk(KERN_ERR "%s: Transmit frame error (len %d)n",
- dev->name, skb->len);
- break;
- }
- }
- return 0;
- }
- static int fr_header(struct sk_buff *skb, struct net_device *dev,
- unsigned short type, void *daddr, void *saddr, unsigned len)
- {
- struct comx_channel *ch = dev->priv;
- struct fr_data *fr = ch->LINE_privdata;
- skb_push(skb, dev->hard_header_len);
- /* Put in DLCI */
- skb->data[0] = (fr->dlci & (1024 - 15)) >> 2;
- skb->data[1] = (fr->dlci & 15) << 4 | 1; // EA bit 1
- skb->data[2] = FRAD_UI;
- skb->data[3] = NLPID_IP;
- return dev->hard_header_len;
- }
- static int fr_statistics(struct net_device *dev, char *page)
- {
- struct comx_channel *ch = dev->priv;
- struct fr_data *fr = ch->LINE_privdata;
- int len = 0;
- if (fr->master == dev) {
- struct proc_dir_entry *dir = ch->procdir->parent->subdir;
- struct net_device *sdev;
- struct comx_channel *sch;
- struct fr_data *sfr;
- int slaves = 0;
- len += sprintf(page + len,
- "This is a Frame Relay master devicenSlaves: ");
- for (; dir ; dir = dir->next) {
- if(!S_ISDIR(dir->mode)) {
- continue;
- }
- if ((sdev = dir->data) && (sch = sdev->priv) &&
- (sdev->type == ARPHRD_DLCI) &&
- (sfr = sch->LINE_privdata) &&
- (sfr->master == dev) && (sdev != dev)) {
- slaves++;
- len += sprintf(page + len, "%s ", sdev->name);
- }
- }
- len += sprintf(page + len, "%sn", slaves ? "" : "(none)");
- if (fr->keepa_freq) {
- len += sprintf(page + len, "Line keepalive (value %d) "
- "status %s [%d]n", fr->keepa_freq,
- ch->line_status & PROTO_LOOP ? "LOOP" :
- ch->line_status & PROTO_UP ? "UP" : "DOWN",
- fr->keepalivecnt);
- } else {
- len += sprintf(page + len, "Line keepalive protocol "
- "is not setn");
- }
- } else { // if slave
- len += sprintf(page + len,
- "This is a Frame Relay slave device, master: %sn",
- fr->master ? fr->master->name : "(not set)");
- }
- return len;
- }
- static int fr_read_proc(char *page, char **start, off_t off, int count,
- int *eof, void *data)
- {
- struct proc_dir_entry *file = (struct proc_dir_entry *)data;
- struct net_device *dev = file->parent->data;
- struct comx_channel *ch = dev->priv;
- struct fr_data *fr = NULL;
- int len = 0;
- if (ch) {
- fr = ch->LINE_privdata;
- }
- if (strcmp(file->name, FILENAME_DLCI) == 0) {
- len = sprintf(page, "%04dn", fr->dlci);
- } else if (strcmp(file->name, FILENAME_MASTER) == 0) {
- len = sprintf(page, "%-9sn", fr->master ? fr->master->name :
- "(none)");
- } else if (strcmp(file->name, FILENAME_KEEPALIVE) == 0) {
- len = fr->keepa_freq ? sprintf(page, "% 3dn", fr->keepa_freq)
- : sprintf(page, "offn");
- } else {
- printk(KERN_ERR "comxfr: internal error, filename %sn", file->name);
- return -EBADF;
- }
- if (off >= len) {
- *eof = 1;
- return 0;
- }
- *start = page + off;
- if (count >= len - off) *eof = 1;
- return min_t(int, count, len - off);
- }
- static int fr_write_proc(struct file *file, const char *buffer,
- u_long count, void *data)
- {
- struct proc_dir_entry *entry = (struct proc_dir_entry *)data;
- struct net_device *dev = entry->parent->data;
- struct comx_channel *ch = dev->priv;
- struct fr_data *fr = NULL;
- char *page;
- if (ch) {
- fr = ch->LINE_privdata;
- }
- if (!(page = (char *)__get_free_page(GFP_KERNEL))) {
- return -ENOMEM;
- }
- copy_from_user(page, buffer, count);
- if (*(page + count - 1) == 'n') {
- *(page + count - 1) = 0;
- }
- if (strcmp(entry->name, FILENAME_DLCI) == 0) {
- u16 dlci_new = simple_strtoul(page, NULL, 10);
- if (dlci_new > 1023) {
- printk(KERN_ERR "Invalid DLCI valuen");
- }
- else fr->dlci = dlci_new;
- } else if (strcmp(entry->name, FILENAME_MASTER) == 0) {
- struct net_device *new_master = dev_get_by_name(page);
- if (new_master && new_master->type == ARPHRD_FRAD) {
- struct comx_channel *sch = new_master->priv;
- struct fr_data *sfr = sch->LINE_privdata;
- if (sfr && sfr->master == new_master) {
- if(fr->master)
- dev_put(fr->master);
- fr->master = new_master;
- /* Megorokli a master statuszat */
- ch->line_status = sch->line_status;
- }
- }
- } else if (strcmp(entry->name, FILENAME_KEEPALIVE) == 0) {
- int keepa_new = -1;
- if (strcmp(page, KEEPALIVE_OFF) == 0) {
- keepa_new = 0;
- } else {
- keepa_new = simple_strtoul(page, NULL, 10);
- }
- if (keepa_new < 0 || keepa_new > 100) {
- printk(KERN_ERR "invalid keepaliven");
- } else {
- if (fr->keepa_freq && keepa_new != fr->keepa_freq) {
- fr_set_keepalive(dev, 0);
- }
- if (keepa_new) {
- fr_set_keepalive(dev, keepa_new);
- }
- }
- } else {
- printk(KERN_ERR "comxfr_write_proc: internal error, filename %sn",
- entry->name);
- count = -EBADF;
- }
- free_page((unsigned long)page);
- return count;
- }
- static int fr_exit(struct net_device *dev)
- {
- struct comx_channel *ch = dev->priv;
- struct fr_data *fr = ch->LINE_privdata;
- struct net_device *sdev = dev;
- struct comx_channel *sch;
- struct fr_data *sfr;
- struct proc_dir_entry *dir = ch->procdir->parent->subdir;
- /* Ha lezarunk egy master-t, le kell kattintani a slave-eket is */
- if (fr->master && fr->master == dev) {
- for (; dir ; dir = dir->next) {
- if(!S_ISDIR(dir->mode)) {
- continue;
- }
- if ((sdev = dir->data) && (sch = sdev->priv) &&
- (sdev->type == ARPHRD_DLCI) &&
- (sfr = sch->LINE_privdata) && (sfr->master == dev)) {
- dev_close(sdev);
- sfr->master = NULL;
- }
- }
- }
- dev->flags = 0;
- dev->type = 0;
- dev->mtu = 0;
- dev->hard_header_len = 0;
- ch->LINE_rx = NULL;
- ch->LINE_tx = NULL;
- ch->LINE_status = NULL;
- ch->LINE_open = NULL;
- ch->LINE_close = NULL;
- ch->LINE_xmit = NULL;
- ch->LINE_header = NULL;
- ch->LINE_rebuild_header = NULL;
- ch->LINE_statistics = NULL;
- ch->LINE_status = 0;
- if (fr->master != dev) { // if not master, remove dlci
- if(fr->master)
- dev_put(fr->master);
- remove_proc_entry(FILENAME_DLCI, ch->procdir);
- remove_proc_entry(FILENAME_MASTER, ch->procdir);
- } else {
- if (fr->keepa_freq) {
- fr_set_keepalive(dev, 0);
- }
- remove_proc_entry(FILENAME_KEEPALIVE, ch->procdir);
- remove_proc_entry(FILENAME_DLCI, ch->procdir);
- }
- kfree(fr);
- ch->LINE_privdata = NULL;
- MOD_DEC_USE_COUNT;
- return 0;
- }
- static int fr_master_init(struct net_device *dev)
- {
- struct comx_channel *ch = dev->priv;
- struct fr_data *fr;
- struct proc_dir_entry *new_file;
- if ((fr = ch->LINE_privdata = kmalloc(sizeof(struct fr_data),
- GFP_KERNEL)) == NULL) {
- return -ENOMEM;
- }
- memset(fr, 0, sizeof(struct fr_data));
- fr->master = dev; // this means master
- fr->dlci = 0; // let's say default
- dev->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
- dev->type = ARPHRD_FRAD;
- dev->mtu = 1500;
- dev->hard_header_len = 4;
- dev->addr_len = 0;
- ch->LINE_rx = fr_rx;
- ch->LINE_tx = fr_tx;
- ch->LINE_status = fr_status;
- ch->LINE_open = fr_open;
- ch->LINE_close = fr_close;
- ch->LINE_xmit = fr_xmit;
- ch->LINE_header = fr_header;
- ch->LINE_rebuild_header = NULL;
- ch->LINE_statistics = fr_statistics;
- if ((new_file = create_proc_entry(FILENAME_DLCI, S_IFREG | 0644,
- ch->procdir)) == NULL) {
- goto cleanup_LINE_privdata;
- }
- new_file->data = (void *)new_file;
- new_file->read_proc = &fr_read_proc;
- new_file->write_proc = &fr_write_proc;
- new_file->size = 5;
- new_file->nlink = 1;
- if ((new_file = create_proc_entry(FILENAME_KEEPALIVE, S_IFREG | 0644,
- ch->procdir)) == NULL) {
- goto cleanup_filename_dlci;
- }
- new_file->data = (void *)new_file;
- new_file->read_proc = &fr_read_proc;
- new_file->write_proc = &fr_write_proc;
- new_file->size = 4;
- new_file->nlink = 1;
- fr_set_keepalive(dev, 0);
- MOD_INC_USE_COUNT;
- return 0;
- cleanup_filename_dlci:
- remove_proc_entry(FILENAME_DLCI, ch->procdir);
- cleanup_LINE_privdata:
- kfree(fr);
- return -EIO;
- }
- static int fr_slave_init(struct net_device *dev)
- {
- struct comx_channel *ch = dev->priv;
- struct fr_data *fr;
- struct proc_dir_entry *new_file;
- if ((fr = ch->LINE_privdata = kmalloc(sizeof(struct fr_data),
- GFP_KERNEL)) == NULL) {
- return -ENOMEM;
- }
- memset(fr, 0, sizeof(struct fr_data));
- dev->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
- dev->type = ARPHRD_DLCI;
- dev->mtu = 1500;
- dev->hard_header_len = 4;
- dev->addr_len = 0;
- ch->LINE_rx = fr_rx;
- ch->LINE_tx = fr_tx;
- ch->LINE_status = fr_status;
- ch->LINE_open = fr_open;
- ch->LINE_close = fr_close;
- ch->LINE_xmit = fr_xmit;
- ch->LINE_header = fr_header;
- ch->LINE_rebuild_header = NULL;
- ch->LINE_statistics = fr_statistics;
- if ((new_file = create_proc_entry(FILENAME_DLCI, S_IFREG | 0644,
- ch->procdir)) == NULL) {
- goto cleanup_LINE_privdata;
- }
-
- new_file->data = (void *)new_file;
- new_file->read_proc = &fr_read_proc;
- new_file->write_proc = &fr_write_proc;
- new_file->size = 5;
- new_file->nlink = 1;
- if ((new_file = create_proc_entry(FILENAME_MASTER, S_IFREG | 0644,
- ch->procdir)) == NULL) {
- goto cleanup_filename_dlci;
- }
- new_file->data = (void *)new_file;
- new_file->read_proc = &fr_read_proc;
- new_file->write_proc = &fr_write_proc;
- new_file->size = 10;
- new_file->nlink = 1;
- MOD_INC_USE_COUNT;
- return 0;
- cleanup_filename_dlci:
- remove_proc_entry(FILENAME_DLCI, ch->procdir);
- cleanup_LINE_privdata:
- kfree(fr);
- return -EIO;
- }
- static int dlci_open(struct net_device *dev)
- {
- struct comx_channel *ch = dev->priv;
- ch->init_status |= HW_OPEN;
- MOD_INC_USE_COUNT;
- return 0;
- }
- static int dlci_close(struct net_device *dev)
- {
- struct comx_channel *ch = dev->priv;
- ch->init_status &= ~HW_OPEN;
- MOD_DEC_USE_COUNT;
- return 0;
- }
- static int dlci_txe(struct net_device *dev)
- {
- struct comx_channel *ch = dev->priv;
- struct fr_data *fr = ch->LINE_privdata;
- if (!fr->master) {
- return 0;
- }
- ch = fr->master->priv;
- fr = ch->LINE_privdata;
- return ch->HW_txe(fr->master);
- }
- static int dlci_statistics(struct net_device *dev, char *page)
- {
- return 0;
- }
- static int dlci_init(struct net_device *dev)
- {
- struct comx_channel *ch = dev->priv;
- ch->HW_open = dlci_open;
- ch->HW_close = dlci_close;
- ch->HW_txe = dlci_txe;
- ch->HW_statistics = dlci_statistics;
- /* Nincs egyeb hw info, mert ugyis a fr->master-bol fog minden kiderulni */
- MOD_INC_USE_COUNT;
- return 0;
- }
- static int dlci_exit(struct net_device *dev)
- {
- struct comx_channel *ch = dev->priv;
- ch->HW_open = NULL;
- ch->HW_close = NULL;
- ch->HW_txe = NULL;
- ch->HW_statistics = NULL;
- MOD_DEC_USE_COUNT;
- return 0;
- }
- static int dlci_dump(struct net_device *dev)
- {
- printk(KERN_INFO "dlci_dump %s, HOGY MI ???n", dev->name);
- return -1;
- }
- static struct comx_protocol fr_master_protocol = {
- name: "frad",
- version: VERSION,
- encap_type: ARPHRD_FRAD,
- line_init: fr_master_init,
- line_exit: fr_exit,
- };
- static struct comx_protocol fr_slave_protocol = {
- name: "ietf-ip",
- version: VERSION,
- encap_type: ARPHRD_DLCI,
- line_init: fr_slave_init,
- line_exit: fr_exit,
- };
- static struct comx_hardware fr_dlci = {
- name: "dlci",
- version: VERSION,
- hw_init: dlci_init,
- hw_exit: dlci_exit,
- hw_dump: dlci_dump,
- };
- #ifdef MODULE
- #define comx_proto_fr_init init_module
- #endif
- int __init comx_proto_fr_init(void)
- {
- int ret;
- if ((ret = comx_register_hardware(&fr_dlci))) {
- return ret;
- }
- if ((ret = comx_register_protocol(&fr_master_protocol))) {
- return ret;
- }
- return comx_register_protocol(&fr_slave_protocol);
- }
- #ifdef MODULE
- void cleanup_module(void)
- {
- comx_unregister_hardware(fr_dlci.name);
- comx_unregister_protocol(fr_master_protocol.name);
- comx_unregister_protocol(fr_slave_protocol.name);
- }
- #endif /* MODULE */