647 lines
14 KiB
C
647 lines
14 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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*
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* Author Karsten Keil <kkeil@novell.com>
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*
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* Copyright 2008 by Karsten Keil <kkeil@novell.com>
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*/
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#include "mISDNif.h"
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#include "core.h"
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#include <stdio.h>
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#include <stdarg.h>
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#include <sys/socket.h>
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#include "socket.h"
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static u_int *debug;
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static struct mISDN_sock_list data_sockets = {
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.lock = 0 //__RW_LOCK_UNLOCKED(data_sockets.lock)
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};
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static struct mISDN_sock_list base_sockets = {
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.lock = 0 //__RW_LOCK_UNLOCKED(base_sockets.lock)
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};
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#define L2_HEADER_LEN 4
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static inline struct sk_buff *
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_l2_alloc_skb(unsigned int len, gfp_t gfp_mask)
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{
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struct sk_buff *skb;
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skb = alloc_skb(len + L2_HEADER_LEN, gfp_mask);
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if (likely(skb))
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skb_reserve(skb, L2_HEADER_LEN);
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return skb;
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}
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static void
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mISDN_sock_link(struct mISDN_sock_list *l, struct mISDN_sock *msk)
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{
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write_lock_bh(&l->lock);
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hlist_add_head(&msk->list, &l->head);
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write_unlock_bh(&l->lock);
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}
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static void mISDN_sock_unlink(struct mISDN_sock_list __attribute__((unused)) *l, struct mISDN_sock *msk)
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{
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write_lock_bh(&l->lock);
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hlist_del(&msk->list);
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write_unlock_bh(&l->lock);
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}
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static int
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mISDN_send(struct mISDNchannel *ch, struct sk_buff *skb)
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{
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struct mISDN_sock *msk;
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msk = container_of(ch, struct mISDN_sock, ch);
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if (*debug & DEBUG_SOCKET)
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printk(KERN_DEBUG "%s len %d %p\n", __func__, skb->len, skb);
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if (msk->sk_state == MISDN_CLOSED)
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return -EUNATCH;
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__net_timestamp(skb);
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skb_queue_tail(&msk->sk_receive_queue, skb);
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return 0;
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}
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static int
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mISDN_ctrl(struct mISDNchannel *ch, u_int cmd, void *arg)
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{
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struct mISDN_sock *msk;
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msk = container_of(ch, struct mISDN_sock, ch);
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if (*debug & DEBUG_SOCKET)
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printk(KERN_DEBUG "%s(%p, %x, %p)\n", __func__, ch, cmd, arg);
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switch (cmd) {
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case CLOSE_CHANNEL:
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msk->sk_state = MISDN_CLOSED;
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break;
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}
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return 0;
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}
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int mISDN_data_recvmsg(void *inst, unsigned char *data, size_t len, int flags, struct sockaddr_mISDN *maddr)
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{
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struct mISDN_sock *msk = (struct mISDN_sock *)inst;
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struct sk_buff *skb;
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size_t copied;
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if (flags & (MSG_OOB))
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return -EOPNOTSUPP;
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if (msk->sk_state == MISDN_CLOSED)
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return 0;
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skb = skb_dequeue(&msk->sk_receive_queue);
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if (!skb)
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return -EAGAIN;
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if (*debug & DEBUG_SOCKET)
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printk(KERN_DEBUG "%s: len %d, flags %x ch.nr %d, proto %x\n",
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__func__, (int)len, flags, msk->ch.nr,
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msk->sk_protocol);
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if (maddr) {
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maddr->family = AF_ISDN;
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maddr->dev = msk->dev->id;
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if ((msk->sk_protocol == ISDN_P_LAPD_TE) ||
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(msk->sk_protocol == ISDN_P_LAPD_NT)) {
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maddr->channel = (mISDN_HEAD_ID(skb) >> 16) & 0xff;
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maddr->tei = (mISDN_HEAD_ID(skb) >> 8) & 0xff;
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maddr->sapi = mISDN_HEAD_ID(skb) & 0xff;
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} else {
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maddr->channel = msk->ch.nr;
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maddr->sapi = msk->ch.addr & 0xFF;
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maddr->tei = (msk->ch.addr >> 8) & 0xFF;
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}
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}
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copied = skb->len + MISDN_HEADER_LEN;
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if (len < copied) {
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if (flags & MSG_PEEK)
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/*refcount_dec(&skb->users)*/;
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else
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skb_queue_head(&msk->sk_receive_queue, skb);
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return -ENOSPC;
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}
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memcpy(skb_push(skb, MISDN_HEADER_LEN), mISDN_HEAD_P(skb),
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MISDN_HEADER_LEN);
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memcpy(data, skb->data, skb->len);
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dev_kfree_skb(skb);
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return copied;
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}
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int mISDN_data_sendmsg(void *inst, unsigned char *data, size_t len, int __attribute__((unused)) flags, struct sockaddr_mISDN *maddr)
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{
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struct mISDN_sock *msk = (struct mISDN_sock *)inst;
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struct sk_buff *skb;
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int err = -ENOMEM;
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if (*debug & DEBUG_SOCKET)
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printk(KERN_DEBUG "%s: len %d ch %d proto %x\n",
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__func__, (int)len, msk->ch.nr,
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msk->sk_protocol);
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if (len < MISDN_HEADER_LEN)
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return -EINVAL;
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if (msk->sk_state != MISDN_BOUND)
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return -EBADFD;
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skb = _l2_alloc_skb(len, GFP_KERNEL);
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if (!skb)
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goto done;
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memcpy(skb_put(skb, len), data, len);
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memcpy(mISDN_HEAD_P(skb), skb->data, MISDN_HEADER_LEN);
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skb_pull(skb, MISDN_HEADER_LEN);
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if (maddr) {
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/* if we have a address, we use it */
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mISDN_HEAD_ID(skb) = maddr->channel;
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} else { /* use default for L2 messages */
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if ((msk->sk_protocol == ISDN_P_LAPD_TE) ||
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(msk->sk_protocol == ISDN_P_LAPD_NT))
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mISDN_HEAD_ID(skb) = msk->ch.nr;
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}
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if (*debug & DEBUG_SOCKET)
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printk(KERN_DEBUG "%s: ID:%x\n",
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__func__, mISDN_HEAD_ID(skb));
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err = -ENODEV;
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if (!msk->ch.peer)
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goto done;
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err = msk->ch.recv(msk->ch.peer, skb);
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if (err)
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goto done;
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else {
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skb = NULL;
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err = len;
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}
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done:
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kfree_skb(skb);
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return err;
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}
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int mISDN_data_release(void *inst)
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{
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struct mISDN_sock *msk = (struct mISDN_sock *)inst;
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if (*debug & DEBUG_SOCKET)
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printk(KERN_DEBUG "%s msk=%p\n", __func__, msk);
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if (!msk)
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return 0;
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switch (msk->sk_protocol) {
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case ISDN_P_TE_S0:
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case ISDN_P_NT_S0:
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case ISDN_P_TE_E1:
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case ISDN_P_NT_E1:
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if (msk->sk_state == MISDN_BOUND)
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delete_channel(&msk->ch);
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else
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mISDN_sock_unlink(&data_sockets, msk);
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break;
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case ISDN_P_LAPD_TE:
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case ISDN_P_LAPD_NT:
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case ISDN_P_B_RAW:
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case ISDN_P_B_HDLC:
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case ISDN_P_B_X75SLP:
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case ISDN_P_B_L2DTMF:
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case ISDN_P_B_L2DSP:
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case ISDN_P_B_L2DSPHDLC:
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delete_channel(&msk->ch);
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mISDN_sock_unlink(&data_sockets, msk);
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break;
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}
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skb_queue_purge(&msk->sk_receive_queue);
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free(msk);
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return 0;
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}
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static int
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data_sock_ioctl_bound(struct mISDN_sock *msk, unsigned int cmd, void *p)
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{
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struct mISDN_ctrl_req cq;
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int err = -EINVAL, val[2];
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struct mISDNchannel *bchan, *next;
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if (!msk->dev) {
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err = -ENODEV;
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goto done;
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}
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switch (cmd) {
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case IMCTRLREQ:
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if (memcpy(&cq, p, sizeof(cq))) {
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err = -EFAULT;
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break;
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}
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if ((msk->sk_protocol & ~ISDN_P_B_MASK) == ISDN_P_B_START) {
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list_for_each_entry_safe(bchan, next,
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&msk->dev->bchannels, list) {
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if ((int)bchan->nr == cq.channel) {
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err = bchan->ctrl(bchan,
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CONTROL_CHANNEL, &cq);
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break;
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}
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}
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} else
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err = msk->dev->D.ctrl(&msk->dev->D,
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CONTROL_CHANNEL, &cq);
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if (err)
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break;
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if (memcpy(p, &cq, sizeof(cq)))
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err = -EFAULT;
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break;
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case IMCLEAR_L2:
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if (msk->sk_protocol != ISDN_P_LAPD_NT) {
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err = -EINVAL;
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break;
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}
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val[0] = cmd;
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val[1] = *((int *)p);
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err = msk->dev->teimgr->ctrl(msk->dev->teimgr,
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CONTROL_CHANNEL, val);
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break;
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case IMHOLD_L1:
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if (msk->sk_protocol != ISDN_P_LAPD_NT
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&& msk->sk_protocol != ISDN_P_LAPD_TE) {
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err = -EINVAL;
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break;
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}
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val[0] = cmd;
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val[1] = *((int *)p);
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err = msk->dev->teimgr->ctrl(msk->dev->teimgr,
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CONTROL_CHANNEL, val);
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break;
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default:
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err = -EINVAL;
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break;
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}
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done:
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return err;
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}
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int mISDN_data_ioctl(void *inst, unsigned int cmd, void *arg)
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{
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int err = 0, id;
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struct mISDN_sock *msk = (struct mISDN_sock *)inst;
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struct mISDNdevice *dev;
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struct mISDNversion ver;
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switch (cmd) {
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case IMGETVERSION:
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ver.major = MISDN_MAJOR_VERSION;
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ver.minor = MISDN_MINOR_VERSION;
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ver.release = MISDN_RELEASE;
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memcpy((void *)arg, &ver, sizeof(ver));
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break;
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case IMGETCOUNT:
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id = get_mdevice_count();
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*((int *)arg) = id;
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break;
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case IMGETDEVINFO:
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id = *((int *)arg);
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dev = get_mdevice(id);
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if (dev) {
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struct mISDN_devinfo di;
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memset(&di, 0, sizeof(di));
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di.id = dev->id;
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di.Dprotocols = dev->Dprotocols;
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di.Bprotocols = dev->Bprotocols | get_all_Bprotocols();
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di.protocol = dev->D.protocol;
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memcpy(di.channelmap, dev->channelmap,
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sizeof(di.channelmap));
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di.nrbchan = dev->nrbchan;
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strncpy(di.name, dev_name(dev), sizeof(di.name));
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di.name[sizeof(di.name) - 1] = '\0';
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memcpy((void *)arg, &di, sizeof(di));
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} else
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err = -ENODEV;
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break;
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default:
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if (msk->sk_state == MISDN_BOUND)
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err = data_sock_ioctl_bound(msk, cmd, arg);
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else
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err = -ENOTCONN;
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}
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return err;
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}
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#if 0
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int mISDN_data_setopt(void *inst, int level, int optname,
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sockptr_t optval, unsigned int len)
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{
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struct mISDN_sock *msk = (struct mISDN_sock *)inst;
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int err = 0, opt = 0;
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if (*debug & DEBUG_SOCKET)
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printk(KERN_DEBUG "%s(%p, %d, %x, optval, %d)\n", __func__, sock,
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level, optname, len);
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switch (optname) {
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case MISDN_TIME_STAMP:
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if (copy_from_sockptr(&opt, optval, sizeof(int))) {
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err = -EFAULT;
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break;
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}
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if (opt)
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msk->cmask |= MISDN_TIME_STAMP;
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else
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msk->cmask &= ~MISDN_TIME_STAMP;
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break;
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default:
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err = -ENOPROTOOPT;
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break;
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}
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return err;
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}
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int mISDN_data_getopt(void *inst, int level, int optname,
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char *optval, int *optlen)
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{
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struct mISDN_sock *msk = (struct mISDN_sock *)inst;
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int len, opt;
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len = *optlen;
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if (len != sizeof(char))
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return -EINVAL;
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switch (optname) {
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case MISDN_TIME_STAMP:
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if (msk->cmask & MISDN_TIME_STAMP)
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opt = 1;
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else
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opt = 0;
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*((int *)optval) = opt;
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return -EFAULT;
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break;
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default:
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return -ENOPROTOOPT;
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}
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return 0;
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}
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#endif
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int mISDN_data_bind(void *inst, struct sockaddr *addr, int addr_len)
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{
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struct sockaddr_mISDN *maddr = (struct sockaddr_mISDN *) addr;
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struct mISDN_sock *msk = (struct mISDN_sock *)inst;
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struct mISDN_sock *cmsk;
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int err = 0;
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if (*debug & DEBUG_SOCKET)
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printk(KERN_DEBUG "%s msk=%p\n", __func__, msk);
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if (addr_len != sizeof(struct sockaddr_mISDN))
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return -EINVAL;
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if (!maddr || maddr->family != AF_ISDN)
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return -EINVAL;
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if (msk->dev) {
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err = -EALREADY;
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goto done;
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}
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msk->dev = get_mdevice(maddr->dev);
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if (!msk->dev) {
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err = -ENODEV;
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goto done;
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}
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if (msk->sk_protocol < ISDN_P_B_START) {
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read_lock_bh(&data_sockets.lock);
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hlist_for_each_entry(cmsk, &data_sockets.head, list) {
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if (msk == cmsk)
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continue;
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if (cmsk->dev != msk->dev)
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continue;
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if (cmsk->sk_protocol >= ISDN_P_B_START)
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continue;
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if (IS_ISDN_P_TE(cmsk->sk_protocol)
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== IS_ISDN_P_TE(msk->sk_protocol))
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continue;
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read_unlock_bh(&data_sockets.lock);
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err = -EBUSY;
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goto done;
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}
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read_unlock_bh(&data_sockets.lock);
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}
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msk->ch.send = mISDN_send;
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msk->ch.ctrl = mISDN_ctrl;
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switch (msk->sk_protocol) {
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case ISDN_P_TE_S0:
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case ISDN_P_NT_S0:
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case ISDN_P_TE_E1:
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case ISDN_P_NT_E1:
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mISDN_sock_unlink(&data_sockets, msk);
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err = connect_layer1(msk->dev, &msk->ch,
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msk->sk_protocol, maddr);
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if (err)
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mISDN_sock_link(&data_sockets, msk);
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break;
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case ISDN_P_LAPD_TE:
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case ISDN_P_LAPD_NT:
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err = create_l2entity(msk->dev, &msk->ch,
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msk->sk_protocol, maddr);
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break;
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case ISDN_P_B_RAW:
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case ISDN_P_B_HDLC:
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case ISDN_P_B_X75SLP:
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case ISDN_P_B_L2DTMF:
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case ISDN_P_B_L2DSP:
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case ISDN_P_B_L2DSPHDLC:
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err = connect_Bstack(msk->dev, &msk->ch,
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msk->sk_protocol, maddr);
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break;
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default:
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err = -EPROTONOSUPPORT;
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}
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if (err)
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goto done;
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msk->sk_state = MISDN_BOUND;
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msk->ch.protocol = msk->sk_protocol;
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done:
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return err;
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}
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int mISDN_data_getname(void *inst, struct sockaddr *addr, int __attribute__((unused)) peer)
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{
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struct sockaddr_mISDN *maddr = (struct sockaddr_mISDN *) addr;
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struct mISDN_sock *msk = (struct mISDN_sock *)inst;
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if (!msk->dev)
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return -EBADFD;
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maddr->family = AF_ISDN;
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maddr->dev = msk->dev->id;
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maddr->channel = msk->ch.nr;
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maddr->sapi = msk->ch.addr & 0xff;
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maddr->tei = (msk->ch.addr >> 8) & 0xff;
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return sizeof(*maddr);
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}
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int mISDN_data_create(void **inst, int protocol)
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{
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struct mISDN_sock *msk;
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msk = calloc(1, sizeof(*msk));
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if (!msk)
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return -ENOMEM;
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printk(KERN_DEBUG "%s msk=%p\n", __func__, msk);
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skb_queue_head_init(&msk->sk_receive_queue);
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msk->sk_protocol = protocol;
|
|
msk->sk_state = MISDN_OPEN;
|
|
mISDN_sock_link(&data_sockets, msk);
|
|
|
|
*inst = msk;
|
|
return 0;
|
|
}
|
|
|
|
int mISDN_base_release(void *inst)
|
|
{
|
|
struct mISDN_sock *msk = (struct mISDN_sock *)inst;
|
|
|
|
printk(KERN_DEBUG "%s msk=%p\n", __func__, msk);
|
|
if (!msk)
|
|
return 0;
|
|
|
|
mISDN_sock_unlink(&base_sockets, msk);
|
|
free(msk);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int mISDN_base_ioctl(void *inst __attribute__((unused)), unsigned int cmd, void *arg)
|
|
{
|
|
int err = 0, id;
|
|
struct mISDNdevice *dev;
|
|
struct mISDNversion ver;
|
|
|
|
switch (cmd) {
|
|
case IMGETVERSION:
|
|
ver.major = MISDN_MAJOR_VERSION;
|
|
ver.minor = MISDN_MINOR_VERSION;
|
|
ver.release = MISDN_RELEASE;
|
|
memcpy((void *)arg, &ver, sizeof(ver));
|
|
break;
|
|
case IMGETCOUNT:
|
|
id = get_mdevice_count();
|
|
*((int *)arg) = id;
|
|
break;
|
|
case IMGETDEVINFO:
|
|
id = *((int *)arg);
|
|
dev = get_mdevice(id);
|
|
if (dev) {
|
|
struct mISDN_devinfo di;
|
|
|
|
memset(&di, 0, sizeof(di));
|
|
di.id = dev->id;
|
|
di.Dprotocols = dev->Dprotocols;
|
|
di.Bprotocols = dev->Bprotocols | get_all_Bprotocols();
|
|
di.protocol = dev->D.protocol;
|
|
memcpy(di.channelmap, dev->channelmap,
|
|
sizeof(di.channelmap));
|
|
di.nrbchan = dev->nrbchan;
|
|
strncpy(di.name, dev_name(dev), sizeof(di.name));
|
|
di.name[sizeof(di.name) - 1] = '\0';
|
|
memcpy((void *)arg, &di, sizeof(di));
|
|
} else
|
|
err = -ENODEV;
|
|
break;
|
|
case IMSETDEVNAME:
|
|
{
|
|
struct mISDN_devrename dn;
|
|
memcpy(&dn, (void *)arg, sizeof(dn));
|
|
dn.name[sizeof(dn.name) - 1] = '\0';
|
|
dev = get_mdevice(dn.id);
|
|
if (dev)
|
|
dev_set_name(dev, "%s", dn.name);
|
|
else
|
|
err = -ENODEV;
|
|
err = -EINVAL;
|
|
}
|
|
break;
|
|
default:
|
|
err = -EINVAL;
|
|
}
|
|
return err;
|
|
}
|
|
|
|
int mISDN_base_bind(void *inst, struct sockaddr *addr, int addr_len)
|
|
{
|
|
struct sockaddr_mISDN *maddr = (struct sockaddr_mISDN *) addr;
|
|
struct mISDN_sock *msk = (struct mISDN_sock *)inst;
|
|
int err = 0;
|
|
|
|
if (addr_len < (int)sizeof(struct sockaddr_mISDN))
|
|
return -EINVAL;
|
|
|
|
if (!maddr || maddr->family != AF_ISDN)
|
|
return -EINVAL;
|
|
|
|
if (msk->dev) {
|
|
err = -EALREADY;
|
|
goto done;
|
|
}
|
|
|
|
msk->dev = get_mdevice(maddr->dev);
|
|
if (!msk->dev) {
|
|
err = -ENODEV;
|
|
goto done;
|
|
}
|
|
msk->sk_state = MISDN_BOUND;
|
|
|
|
done:
|
|
return err;
|
|
}
|
|
|
|
int mISDN_base_create(void **inst, int protocol)
|
|
{
|
|
struct mISDN_sock *msk;
|
|
|
|
msk = calloc(1, sizeof(*msk));
|
|
if (!msk)
|
|
return -ENOMEM;
|
|
printk(KERN_DEBUG "%s msk=%p\n", __func__, msk);
|
|
|
|
skb_queue_head_init(&msk->sk_receive_queue);
|
|
|
|
msk->sk_protocol = protocol;
|
|
msk->sk_state = MISDN_OPEN;
|
|
mISDN_sock_link(&base_sockets, msk);
|
|
|
|
*inst = msk;
|
|
return 0;
|
|
}
|
|
|
|
int misdn_sock_init(u_int *deb)
|
|
{
|
|
debug = deb;
|
|
return 0;
|
|
}
|
|
|
|
void misdn_sock_cleanup(void)
|
|
{
|
|
}
|
|
|