http://www.ousob.com --- Legacy Redefined OuSob - File: /wwwroot/clipx/usr/include/linux/hdlc.h

/* * Generic HDLC support routines for Linux * * Copyright (C) 1999-2005 Krzysztof Halasa <khc@pm.waw.pl> * * This program is free software; you can redistribute it and/or modify it * under the terms of version 2 of the GNU General Public License * as published by the Free Software Foundation. */ #ifndef __HDLC_H #define __HDLC_H #define GENERIC_HDLC_VERSION 4 /* For synchronization with sethdlc utility */ #define CLOCK_DEFAULT 0 /* Default setting */ #define CLOCK_EXT 1 /* External TX and RX clock - DTE */ #define CLOCK_INT 2 /* Internal TX and RX clock - DCE */ #define CLOCK_TXINT 3 /* Internal TX and external RX clock */ #define CLOCK_TXFROMRX 4 /* TX clock derived from external RX clock */ #define ENCODING_DEFAULT 0 /* Default setting */ #define ENCODING_NRZ 1 #define ENCODING_NRZI 2 #define ENCODING_FM_MARK 3 #define ENCODING_FM_SPACE 4 #define ENCODING_MANCHESTER 5 #define PARITY_DEFAULT 0 /* Default setting */ #define PARITY_NONE 1 /* No parity */ #define PARITY_CRC16_PR0 2 /* CRC16, initial value 0x0000 */ #define PARITY_CRC16_PR1 3 /* CRC16, initial value 0xFFFF */ #define PARITY_CRC16_PR0_CCITT 4 /* CRC16, initial 0x0000, ITU-T version */ #define PARITY_CRC16_PR1_CCITT 5 /* CRC16, initial 0xFFFF, ITU-T version */ #define PARITY_CRC32_PR0_CCITT 6 /* CRC32, initial value 0x00000000 */ #define PARITY_CRC32_PR1_CCITT 7 /* CRC32, initial value 0xFFFFFFFF */ #define LMI_DEFAULT 0 /* Default setting */ #define LMI_NONE 1 /* No LMI, all PVCs are static */ #define LMI_ANSI 2 /* ANSI Annex D */ #define LMI_CCITT 3 /* ITU-T Annex A */ #define LMI_CISCO 4 /* The "original" LMI, aka Gang of Four */ #define HDLC_MAX_MTU 1500 /* Ethernet 1500 bytes */ #define HDLC_MAX_MRU (HDLC_MAX_MTU + 10 + 14 + 4) /* for ETH+VLAN over FR */ #ifdef __KERNEL__ #include <linux/skbuff.h> #include <linux/netdevice.h> #include <net/syncppp.h> #include <linux/hdlc/ioctl.h> typedef struct { /* Used in Cisco and PPP mode */ u8 address; u8 control; u16 protocol; }__attribute__ ((packed)) hdlc_header; typedef struct { u32 type; /* code */ u32 par1; u32 par2; u16 rel; /* reliability */ u32 time; }__attribute__ ((packed)) cisco_packet; #define CISCO_PACKET_LEN 18 #define CISCO_BIG_PACKET_LEN 20 typedef struct pvc_device_struct { struct net_device *master; struct net_device *main; struct net_device *ether; /* bridged Ethernet interface */ struct pvc_device_struct *next; /* Sorted in ascending DLCI order */ int dlci; int open_count; struct { unsigned int new: 1; unsigned int active: 1; unsigned int exist: 1; unsigned int deleted: 1; unsigned int fecn: 1; unsigned int becn: 1; unsigned int bandwidth; /* Cisco LMI reporting only */ }state; }pvc_device; typedef struct hdlc_device_struct { /* To be initialized by hardware driver */ struct net_device_stats stats; /* used by HDLC layer to take control over HDLC device from hw driver*/ int (*attach)(struct net_device *dev, unsigned short encoding, unsigned short parity); /* hardware driver must handle this instead of dev->hard_start_xmit */ int (*xmit)(struct sk_buff *skb, struct net_device *dev); /* Things below are for HDLC layer internal use only */ struct { int (*open)(struct net_device *dev); void (*close)(struct net_device *dev); /* if open & DCD */ void (*start)(struct net_device *dev); /* if open & !DCD */ void (*stop)(struct net_device *dev); void (*detach)(struct hdlc_device_struct *hdlc); int (*netif_rx)(struct sk_buff *skb); unsigned short (*type_trans)(struct sk_buff *skb, struct net_device *dev); int id; /* IF_PROTO_HDLC/CISCO/FR/etc. */ }proto; int carrier; int open; spinlock_t state_lock; union { struct { fr_proto settings; pvc_device *first_pvc; int dce_pvc_count; struct timer_list timer; unsigned long last_poll; int reliable; int dce_changed; int request; int fullrep_sent; u32 last_errors; /* last errors bit list */ u8 n391cnt; u8 txseq; /* TX sequence number */ u8 rxseq; /* RX sequence number */ }fr; struct { cisco_proto settings; struct timer_list timer; unsigned long last_poll; int up; int request_sent; u32 txseq; /* TX sequence number */ u32 rxseq; /* RX sequence number */ }cisco; struct { raw_hdlc_proto settings; }raw_hdlc; struct { struct ppp_device pppdev; struct ppp_device *syncppp_ptr; int (*old_change_mtu)(struct net_device *dev, int new_mtu); }ppp; }state; void *priv; }hdlc_device; int hdlc_raw_ioctl(struct net_device *dev, struct ifreq *ifr); int hdlc_raw_eth_ioctl(struct net_device *dev, struct ifreq *ifr); int hdlc_cisco_ioctl(struct net_device *dev, struct ifreq *ifr); int hdlc_ppp_ioctl(struct net_device *dev, struct ifreq *ifr); int hdlc_fr_ioctl(struct net_device *dev, struct ifreq *ifr); int hdlc_x25_ioctl(struct net_device *dev, struct ifreq *ifr); /* Exported from hdlc.o */ /* Called by hardware driver when a user requests HDLC service */ int hdlc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd); /* Must be used by hardware driver on module startup/exit */ int register_hdlc_device(struct net_device *dev); void unregister_hdlc_device(struct net_device *dev); struct net_device *alloc_hdlcdev(void *priv); static __inline__ hdlc_device* dev_to_hdlc(struct net_device *dev) { return netdev_priv(dev); } static __inline__ pvc_device* dev_to_pvc(struct net_device *dev) { return (pvc_device*)dev->priv; } static __inline__ void debug_frame(const struct sk_buff *skb) { int i; for (i=0; i < skb->len; i++) { if (i == 100) { printk("...\n"); return; } printk(" %02X", skb->data[i]); } printk("\n"); } /* Must be called by hardware driver when HDLC device is being opened */ int hdlc_open(struct net_device *dev); /* Must be called by hardware driver when HDLC device is being closed */ void hdlc_close(struct net_device *dev); /* Called by hardware driver when DCD line level changes */ void hdlc_set_carrier(int on, struct net_device *dev); /* May be used by hardware driver to gain control over HDLC device */ static __inline__ void hdlc_proto_detach(hdlc_device *hdlc) { if (hdlc->proto.detach) hdlc->proto.detach(hdlc); hdlc->proto.detach = NULL; } static __inline__ struct net_device_stats *hdlc_stats(struct net_device *dev) { return &dev_to_hdlc(dev)->stats; } static __inline__ __be16 hdlc_type_trans(struct sk_buff *skb, struct net_device *dev) { hdlc_device *hdlc = dev_to_hdlc(dev); skb->mac.raw = skb->data; skb->dev = dev; if (hdlc->proto.type_trans) return hdlc->proto.type_trans(skb, dev); else return htons(ETH_P_HDLC); } #endif /* __KERNEL */ #endif /* __HDLC_H */