mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-12 05:48:40 +00:00
![Linus Torvalds](/assets/img/avatar_default.png)
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
266 lines
5.9 KiB
C
266 lines
5.9 KiB
C
/*
|
|
* 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.
|
|
*
|
|
* Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
|
|
*/
|
|
#include <linux/config.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/types.h>
|
|
#include <linux/socket.h>
|
|
#include <linux/in.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/timer.h>
|
|
#include <linux/string.h>
|
|
#include <linux/sockios.h>
|
|
#include <linux/net.h>
|
|
#include <net/ax25.h>
|
|
#include <linux/inet.h>
|
|
#include <linux/netdevice.h>
|
|
#include <linux/skbuff.h>
|
|
#include <net/sock.h>
|
|
#include <asm/uaccess.h>
|
|
#include <asm/system.h>
|
|
#include <linux/fcntl.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/interrupt.h>
|
|
|
|
static struct protocol_struct {
|
|
struct protocol_struct *next;
|
|
unsigned int pid;
|
|
int (*func)(struct sk_buff *, ax25_cb *);
|
|
} *protocol_list = NULL;
|
|
static DEFINE_RWLOCK(protocol_list_lock);
|
|
|
|
static struct linkfail_struct {
|
|
struct linkfail_struct *next;
|
|
void (*func)(ax25_cb *, int);
|
|
} *linkfail_list = NULL;
|
|
static DEFINE_SPINLOCK(linkfail_lock);
|
|
|
|
static struct listen_struct {
|
|
struct listen_struct *next;
|
|
ax25_address callsign;
|
|
struct net_device *dev;
|
|
} *listen_list = NULL;
|
|
static DEFINE_SPINLOCK(listen_lock);
|
|
|
|
int ax25_protocol_register(unsigned int pid,
|
|
int (*func)(struct sk_buff *, ax25_cb *))
|
|
{
|
|
struct protocol_struct *protocol;
|
|
|
|
if (pid == AX25_P_TEXT || pid == AX25_P_SEGMENT)
|
|
return 0;
|
|
#ifdef CONFIG_INET
|
|
if (pid == AX25_P_IP || pid == AX25_P_ARP)
|
|
return 0;
|
|
#endif
|
|
if ((protocol = kmalloc(sizeof(*protocol), GFP_ATOMIC)) == NULL)
|
|
return 0;
|
|
|
|
protocol->pid = pid;
|
|
protocol->func = func;
|
|
|
|
write_lock(&protocol_list_lock);
|
|
protocol->next = protocol_list;
|
|
protocol_list = protocol;
|
|
write_unlock(&protocol_list_lock);
|
|
|
|
return 1;
|
|
}
|
|
|
|
void ax25_protocol_release(unsigned int pid)
|
|
{
|
|
struct protocol_struct *s, *protocol;
|
|
|
|
write_lock(&protocol_list_lock);
|
|
protocol = protocol_list;
|
|
if (protocol == NULL) {
|
|
write_unlock(&protocol_list_lock);
|
|
return;
|
|
}
|
|
|
|
if (protocol->pid == pid) {
|
|
protocol_list = protocol->next;
|
|
write_unlock(&protocol_list_lock);
|
|
kfree(protocol);
|
|
return;
|
|
}
|
|
|
|
while (protocol != NULL && protocol->next != NULL) {
|
|
if (protocol->next->pid == pid) {
|
|
s = protocol->next;
|
|
protocol->next = protocol->next->next;
|
|
write_unlock(&protocol_list_lock);
|
|
kfree(s);
|
|
return;
|
|
}
|
|
|
|
protocol = protocol->next;
|
|
}
|
|
write_unlock(&protocol_list_lock);
|
|
}
|
|
|
|
int ax25_linkfail_register(void (*func)(ax25_cb *, int))
|
|
{
|
|
struct linkfail_struct *linkfail;
|
|
|
|
if ((linkfail = kmalloc(sizeof(*linkfail), GFP_ATOMIC)) == NULL)
|
|
return 0;
|
|
|
|
linkfail->func = func;
|
|
|
|
spin_lock_bh(&linkfail_lock);
|
|
linkfail->next = linkfail_list;
|
|
linkfail_list = linkfail;
|
|
spin_unlock_bh(&linkfail_lock);
|
|
|
|
return 1;
|
|
}
|
|
|
|
void ax25_linkfail_release(void (*func)(ax25_cb *, int))
|
|
{
|
|
struct linkfail_struct *s, *linkfail;
|
|
|
|
spin_lock_bh(&linkfail_lock);
|
|
linkfail = linkfail_list;
|
|
if (linkfail == NULL) {
|
|
spin_unlock_bh(&linkfail_lock);
|
|
return;
|
|
}
|
|
|
|
if (linkfail->func == func) {
|
|
linkfail_list = linkfail->next;
|
|
spin_unlock_bh(&linkfail_lock);
|
|
kfree(linkfail);
|
|
return;
|
|
}
|
|
|
|
while (linkfail != NULL && linkfail->next != NULL) {
|
|
if (linkfail->next->func == func) {
|
|
s = linkfail->next;
|
|
linkfail->next = linkfail->next->next;
|
|
spin_unlock_bh(&linkfail_lock);
|
|
kfree(s);
|
|
return;
|
|
}
|
|
|
|
linkfail = linkfail->next;
|
|
}
|
|
spin_unlock_bh(&linkfail_lock);
|
|
}
|
|
|
|
int ax25_listen_register(ax25_address *callsign, struct net_device *dev)
|
|
{
|
|
struct listen_struct *listen;
|
|
|
|
if (ax25_listen_mine(callsign, dev))
|
|
return 0;
|
|
|
|
if ((listen = kmalloc(sizeof(*listen), GFP_ATOMIC)) == NULL)
|
|
return 0;
|
|
|
|
listen->callsign = *callsign;
|
|
listen->dev = dev;
|
|
|
|
spin_lock_bh(&listen_lock);
|
|
listen->next = listen_list;
|
|
listen_list = listen;
|
|
spin_unlock_bh(&listen_lock);
|
|
|
|
return 1;
|
|
}
|
|
|
|
void ax25_listen_release(ax25_address *callsign, struct net_device *dev)
|
|
{
|
|
struct listen_struct *s, *listen;
|
|
|
|
spin_lock_bh(&listen_lock);
|
|
listen = listen_list;
|
|
if (listen == NULL) {
|
|
spin_unlock_bh(&listen_lock);
|
|
return;
|
|
}
|
|
|
|
if (ax25cmp(&listen->callsign, callsign) == 0 && listen->dev == dev) {
|
|
listen_list = listen->next;
|
|
spin_unlock_bh(&listen_lock);
|
|
kfree(listen);
|
|
return;
|
|
}
|
|
|
|
while (listen != NULL && listen->next != NULL) {
|
|
if (ax25cmp(&listen->next->callsign, callsign) == 0 && listen->next->dev == dev) {
|
|
s = listen->next;
|
|
listen->next = listen->next->next;
|
|
spin_unlock_bh(&listen_lock);
|
|
kfree(s);
|
|
return;
|
|
}
|
|
|
|
listen = listen->next;
|
|
}
|
|
spin_unlock_bh(&listen_lock);
|
|
}
|
|
|
|
int (*ax25_protocol_function(unsigned int pid))(struct sk_buff *, ax25_cb *)
|
|
{
|
|
int (*res)(struct sk_buff *, ax25_cb *) = NULL;
|
|
struct protocol_struct *protocol;
|
|
|
|
read_lock(&protocol_list_lock);
|
|
for (protocol = protocol_list; protocol != NULL; protocol = protocol->next)
|
|
if (protocol->pid == pid) {
|
|
res = protocol->func;
|
|
break;
|
|
}
|
|
read_unlock(&protocol_list_lock);
|
|
|
|
return res;
|
|
}
|
|
|
|
int ax25_listen_mine(ax25_address *callsign, struct net_device *dev)
|
|
{
|
|
struct listen_struct *listen;
|
|
|
|
spin_lock_bh(&listen_lock);
|
|
for (listen = listen_list; listen != NULL; listen = listen->next)
|
|
if (ax25cmp(&listen->callsign, callsign) == 0 && (listen->dev == dev || listen->dev == NULL)) {
|
|
spin_unlock_bh(&listen_lock);
|
|
return 1;
|
|
}
|
|
spin_unlock_bh(&listen_lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void ax25_link_failed(ax25_cb *ax25, int reason)
|
|
{
|
|
struct linkfail_struct *linkfail;
|
|
|
|
spin_lock_bh(&linkfail_lock);
|
|
for (linkfail = linkfail_list; linkfail != NULL; linkfail = linkfail->next)
|
|
(linkfail->func)(ax25, reason);
|
|
spin_unlock_bh(&linkfail_lock);
|
|
}
|
|
|
|
int ax25_protocol_is_registered(unsigned int pid)
|
|
{
|
|
struct protocol_struct *protocol;
|
|
int res = 0;
|
|
|
|
read_lock(&protocol_list_lock);
|
|
for (protocol = protocol_list; protocol != NULL; protocol = protocol->next)
|
|
if (protocol->pid == pid) {
|
|
res = 1;
|
|
break;
|
|
}
|
|
read_unlock(&protocol_list_lock);
|
|
|
|
return res;
|
|
}
|