path: root/net/iucv/af_iucv.c

/*
 *  linux/net/iucv/af_iucv.c
 *
 *  IUCV protocol stack for Linux on zSeries
 *
 *  Copyright 2006 IBM Corporation
 *
 *  Author(s):	Jennifer Hunt <jenhunt@us.ibm.com>
 */

#define KMSG_COMPONENT "af_iucv"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt

#include <linux/module.h>
#include <linux/types.h>
#include <linux/list.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/skbuff.h>
#include <linux/init.h>
#include <linux/poll.h>
#include <net/sock.h>
#include <asm/ebcdic.h>
#include <asm/cpcmd.h>
#include <linux/kmod.h>

#include <net/iucv/iucv.h>
#include <net/iucv/af_iucv.h>

#define CONFIG_IUCV_SOCK_DEBUG 1

#define IPRMDATA 0x80
#define VERSION "1.0"

static char iucv_userid[80];

static struct proto_ops iucv_sock_ops;

static struct proto iucv_proto = {
	.name		= "AF_IUCV",
	.owner		= THIS_MODULE,
	.obj_size	= sizeof(struct iucv_sock),
};

static void iucv_sock_kill(struct sock *sk);
static void iucv_sock_close(struct sock *sk);

/* Call Back functions */
static void iucv_callback_rx(struct iucv_path *, struct iucv_message *);
static void iucv_callback_txdone(struct iucv_path *, struct iucv_message *);
static void iucv_callback_connack(struct iucv_path *, u8 ipuser[16]);
static int iucv_callback_connreq(struct iucv_path *, u8 ipvmid[8],
				 u8 ipuser[16]);
static void iucv_callback_connrej(struct iucv_path *, u8 ipuser[16]);

static struct iucv_sock_list iucv_sk_list = {
	.lock = __RW_LOCK_UNLOCKED(iucv_sk_list.lock),
	.autobind_name = ATOMIC_INIT(0)
};

static struct iucv_handler af_iucv_handler = {
	.path_pending	  = iucv_callback_connreq,
	.path_complete	  = iucv_callback_connack,
	.path_severed	  = iucv_callback_connrej,
	.message_pending  = iucv_callback_rx,
	.message_complete = iucv_callback_txdone
};

static inline void high_nmcpy(unsigned char *dst, char *src)
{
       memcpy(dst, src, 8);
}

static inline void low_nmcpy(unsigned char *dst, char *src)
{
       memcpy(&dst[8], src, 8);
}

/* Timers */
static void iucv_sock_timeout(unsigned long arg)
{
	struct sock *sk = (struct sock *)arg;

	bh_lock_sock(sk);
	sk->sk_err = ETIMEDOUT;
	sk->sk_state_change(sk);
	bh_unlock_sock(sk);

	iucv_sock_kill(sk);
	sock_put(sk);
}

static void iucv_sock_clear_timer(struct sock *sk)
{
	sk_stop_timer(sk, &sk->sk_timer