isdn_net.h
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上传日期:2013-04-10
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- /* $Id: isdn_net.h,v 1.1.4.1 2001/11/20 14:19:34 kai Exp $
- *
- * header for Linux ISDN subsystem, network related functions (linklevel).
- *
- * Copyright 1994-1999 by Fritz Elfert (fritz@isdn4linux.de)
- * Copyright 1995,96 by Thinking Objects Software GmbH Wuerzburg
- * Copyright 1995,96 by Michael Hipp (Michael.Hipp@student.uni-tuebingen.de)
- *
- * This software may be used and distributed according to the terms
- * of the GNU General Public License, incorporated herein by reference.
- *
- */
- /* Definitions for hupflags: */
- #define ISDN_WAITCHARGE 1 /* did not get a charge info yet */
- #define ISDN_HAVECHARGE 2 /* We know a charge info */
- #define ISDN_CHARGEHUP 4 /* We want to use the charge mechanism */
- #define ISDN_INHUP 8 /* Even if incoming, close after huptimeout */
- #define ISDN_MANCHARGE 16 /* Charge Interval manually set */
- /*
- * Definitions for Cisco-HDLC header.
- */
- #define CISCO_ADDR_UNICAST 0x0f
- #define CISCO_ADDR_BROADCAST 0x8f
- #define CISCO_CTRL 0x00
- #define CISCO_TYPE_CDP 0x2000
- #define CISCO_TYPE_SLARP 0x8035
- #define CISCO_SLARP_REQUEST 0
- #define CISCO_SLARP_REPLY 1
- #define CISCO_SLARP_KEEPALIVE 2
- extern char *isdn_net_new(char *, struct net_device *);
- extern char *isdn_net_newslave(char *);
- extern int isdn_net_rm(char *);
- extern int isdn_net_rmall(void);
- extern int isdn_net_stat_callback(int, isdn_ctrl *);
- extern int isdn_net_setcfg(isdn_net_ioctl_cfg *);
- extern int isdn_net_getcfg(isdn_net_ioctl_cfg *);
- extern int isdn_net_addphone(isdn_net_ioctl_phone *);
- extern int isdn_net_getphones(isdn_net_ioctl_phone *, char *);
- extern int isdn_net_getpeer(isdn_net_ioctl_phone *, isdn_net_ioctl_phone *);
- extern int isdn_net_delphone(isdn_net_ioctl_phone *);
- extern int isdn_net_find_icall(int, int, int, setup_parm *);
- extern void isdn_net_hangup(struct net_device *);
- extern void isdn_net_dial(void);
- extern void isdn_net_autohup(void);
- extern int isdn_net_force_hangup(char *);
- extern int isdn_net_force_dial(char *);
- extern isdn_net_dev *isdn_net_findif(char *);
- extern int isdn_net_rcv_skb(int, struct sk_buff *);
- extern int isdn_net_dial_req(isdn_net_local *);
- extern void isdn_net_writebuf_skb(isdn_net_local *lp, struct sk_buff *skb);
- extern void isdn_net_write_super(isdn_net_local *lp, struct sk_buff *skb);
- #define ISDN_NET_MAX_QUEUE_LENGTH 2
- /*
- * is this particular channel busy?
- */
- static __inline__ int isdn_net_lp_busy(isdn_net_local *lp)
- {
- if (atomic_read(&lp->frame_cnt) < ISDN_NET_MAX_QUEUE_LENGTH)
- return 0;
- else
- return 1;
- }
- /*
- * For the given net device, this will get a non-busy channel out of the
- * corresponding bundle. The returned channel is locked.
- */
- static __inline__ isdn_net_local * isdn_net_get_locked_lp(isdn_net_dev *nd)
- {
- unsigned long flags;
- isdn_net_local *lp;
- spin_lock_irqsave(&nd->queue_lock, flags);
- lp = nd->queue; /* get lp on top of queue */
- spin_lock_bh(&nd->queue->xmit_lock);
- while (isdn_net_lp_busy(nd->queue)) {
- spin_unlock_bh(&nd->queue->xmit_lock);
- nd->queue = nd->queue->next;
- if (nd->queue == lp) { /* not found -- should never happen */
- lp = NULL;
- goto errout;
- }
- spin_lock_bh(&nd->queue->xmit_lock);
- }
- lp = nd->queue;
- nd->queue = nd->queue->next;
- errout:
- spin_unlock_irqrestore(&nd->queue_lock, flags);
- return lp;
- }
- /*
- * add a channel to a bundle
- */
- static __inline__ void isdn_net_add_to_bundle(isdn_net_dev *nd, isdn_net_local *nlp)
- {
- isdn_net_local *lp;
- unsigned long flags;
- spin_lock_irqsave(&nd->queue_lock, flags);
- lp = nd->queue;
- // printk(KERN_DEBUG __FUNCTION__": lp:%s(%p) nlp:%s(%p) last(%p)n",
- // lp->name, lp, nlp->name, nlp, lp->last);
- nlp->last = lp->last;
- lp->last->next = nlp;
- lp->last = nlp;
- nlp->next = lp;
- nd->queue = nlp;
- spin_unlock_irqrestore(&nd->queue_lock, flags);
- }
- /*
- * remove a channel from the bundle it belongs to
- */
- static __inline__ void isdn_net_rm_from_bundle(isdn_net_local *lp)
- {
- isdn_net_local *master_lp = lp;
- unsigned long flags;
- if (lp->master)
- master_lp = (isdn_net_local *) lp->master->priv;
- // printk(KERN_DEBUG __FUNCTION__": lp:%s(%p) mlp:%s(%p) last(%p) next(%p) mndq(%p)n",
- // lp->name, lp, master_lp->name, master_lp, lp->last, lp->next, master_lp->netdev->queue);
- spin_lock_irqsave(&master_lp->netdev->queue_lock, flags);
- lp->last->next = lp->next;
- lp->next->last = lp->last;
- if (master_lp->netdev->queue == lp) {
- master_lp->netdev->queue = lp->next;
- if (lp->next == lp) { /* last in queue */
- master_lp->netdev->queue = master_lp->netdev->local;
- }
- }
- lp->next = lp->last = lp; /* (re)set own pointers */
- // printk(KERN_DEBUG __FUNCTION__": mndq(%p)n",
- // master_lp->netdev->queue);
- spin_unlock_irqrestore(&master_lp->netdev->queue_lock, flags);
- }
- static inline int
- put_u8(unsigned char *p, u8 x)
- {
- *p = x;
- return 1;
- }
- static inline int
- put_u16(unsigned char *p, u16 x)
- {
- *((u16 *)p) = htons(x);
- return 2;
- }
- static inline int
- put_u32(unsigned char *p, u32 x)
- {
- *((u32 *)p) = htonl(x);
- return 4;
- }
- static inline int
- get_u8(unsigned char *p, u8 *x)
- {
- *x = *p;
- return 1;
- }
- static inline int
- get_u16(unsigned char *p, u16 *x)
- {
- *x = ntohs(*((u16 *)p));
- return 2;
- }
- static inline int
- get_u32(unsigned char *p, u32 *x)
- {
- *x = ntohl(*((u32 *)p));
- return 4;
- }