/* $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_INET 0x0800 #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; 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; 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; lp->next = lp->last = lp; /* (re)set own pointers */ 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; }