isdn_ppp_open(int min, struct file *file)
{
	int slot;
	struct ippp_struct *is;

	if (min < 0 || min >= ISDN_MAX_CHANNELS)
		return -ENODEV;

	slot = isdn_ppp_get_slot();
	if (slot < 0) {
		return -EBUSY;
	}
	is = file->private_data = ippp_table[slot];

	printk(KERN_DEBUG "ippp, open, slot: %d, minor: %d, state: %04x\n",
	       slot, min, is->state);

	/* compression stuff */
	is->link_compressor   = is->compressor = NULL;
	is->link_decompressor = is->decompressor = NULL;
	is->link_comp_stat    = is->comp_stat = NULL;
	is->link_decomp_stat  = is->decomp_stat = NULL;
	is->compflags = 0;

	is->reset = isdn_ppp_ccp_reset_alloc(is);

	is->lp = NULL;
	is->mp_seqno = 0;       /* MP sequence number */
	is->pppcfg = 0;         /* ppp configuration */
	is->mpppcfg = 0;        /* mppp configuration */
	is->last_link_seqno = -1;	/* MP: maybe set to Bundle-MIN, when joining a bundle ?? */
	is->unit = -1;          /* set, when we have our interface */
	is->mru = 1524;         /* MRU, default 1524 */
	is->maxcid = 16;        /* VJ: maxcid */
	is->tk = current;
	init_waitqueue_head(&is->wq);
	is->first = is->rq + NUM_RCV_BUFFS - 1;	/* receive queue */
	is->last = is->rq;
	is->minor = min;
#ifdef CONFIG_ISDN_PPP_VJ
	/*
	 * VJ header compression init
	 */
	is->slcomp = slhc_init(16, 16);	/* not necessary for 2. link in bundle */
#endif
#ifdef CONFIG_IPPP_FILTER
	is->pass_filter = NULL;
	is->active_filter = NULL;
#endif
	is->state = IPPP_OPEN;

	return 0;
}
Unknown