/* * Generic HDLC support routines for Linux * * Copyright (C) 1999, 2000 Krzysztof Halasa * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. */ #ifndef __HDLC_H #define __HDLC_H /* Ioctls - to be changed */ #define HDLCGSLOTMAP (0x89F4) /* E1/T1 slot bitmap */ #define HDLCGCLOCK (0x89F5) /* clock sources */ #define HDLCGCLOCKRATE (0x89F6) /* clock rate */ #define HDLCGMODE (0x89F7) /* internal to hdlc.c - protocol used */ #define HDLCGLINE (0x89F8) /* physical interface */ #define HDLCSSLOTMAP (0x89F9) #define HDLCSCLOCK (0x89FA) #define HDLCSCLOCKRATE (0x89FB) #define HDLCSMODE (0x89FC) /* internal to hdlc.c - select protocol */ #define HDLCPVC (0x89FD) /* internal to hdlc.c - create/delete PVC */ #define HDLCSLINE (0x89FE) #define HDLCRUN (0x89FF) /* Download firmware and run board */ /* Modes */ #define MODE_NONE 0x00000000 /* Not initialized */ #define MODE_DCE 0x00000080 /* DCE */ #define MODE_HDLC 0x00000100 /* Raw HDLC frames */ #define MODE_CISCO 0x00000200 #define MODE_PPP 0x00000400 #define MODE_FR 0x00000800 /* Any LMI */ #define MODE_FR_ANSI 0x00000801 #define MODE_FR_CCITT 0x00000802 #define MODE_X25 0x00001000 #define MODE_MASK 0x0000FF00 #define MODE_SOFT 0x80000000 /* Driver modes, using hardware HDLC */ /* Lines */ #define LINE_DEFAULT 0x00000000 #define LINE_V35 0x00000001 #define LINE_RS232 0x00000002 #define LINE_X21 0x00000003 #define LINE_T1 0x00000004 #define LINE_E1 0x00000005 #define LINE_MASK 0x000000FF #define LINE_LOOPBACK 0x80000000 /* On-card loopback */ #define CLOCK_EXT 0 /* External TX and RX clock - DTE */ #define CLOCK_INT 1 /* Internal TX and RX clock - DCE */ #define CLOCK_TXINT 2 /* Internal TX and external RX clock */ #define CLOCK_TXFROMRX 3 /* TX clock derived from external RX clock */ #define HDLC_MAX_MTU 1500 /* Ethernet 1500 bytes */ #define HDLC_MAX_MRU (HDLC_MAX_MTU + 10) /* max 10 bytes for FR */ #ifdef __KERNEL__ #include #include #include #define MAXLEN_LMISTAT 20 /* max size of status enquiry frame */ #define LINK_STATE_RELIABLE 0x01 #define LINK_STATE_REQUEST 0x02 /* full stat sent (DCE) / req pending (DTE) */ #define LINK_STATE_CHANGED 0x04 /* change in PVCs state, send full report */ #define LINK_STATE_FULLREP_SENT 0x08 /* full report sent */ #define PVC_STATE_NEW 0x01 #define PVC_STATE_ACTIVE 0x02 #define PVC_STATE_FECN 0x08 /* FECN condition */ #define PVC_STATE_BECN 0x10 /* BECN condition */ #define FR_UI 0x03 #define FR_PAD 0x00 #define NLPID_IP 0xCC #define NLPID_IPV6 0x8E #define NLPID_SNAP 0x80 #define NLPID_PAD 0x00 #define NLPID_Q933 0x08 #define LMI_DLCI 0 /* LMI DLCI */ #define LMI_PROTO 0x08 #define LMI_CALLREF 0x00 /* Call Reference */ #define LMI_ANSI_LOCKSHIFT 0x95 /* ANSI lockshift */ #define LMI_REPTYPE 1 /* report type */ #define LMI_CCITT_REPTYPE 0x51 #define LMI_ALIVE 3 /* keep alive */ #define LMI_CCITT_ALIVE 0x53 #define LMI_PVCSTAT 7 /* pvc status */ #define LMI_CCITT_PVCSTAT 0x57 #define LMI_FULLREP 0 /* full report */ #define LMI_INTEGRITY 1 /* link integrity report */ #define LMI_SINGLE 2 /* single pvc report */ #define LMI_STATUS_ENQUIRY 0x75 #define LMI_STATUS 0x7D /* reply */ #define LMI_REPT_LEN 1 /* report type element length */ #define LMI_INTEG_LEN 2 /* link integrity element length */ #define LMI_LENGTH 13 /* standard LMI frame length */ #define LMI_ANSI_LENGTH 14 typedef struct { unsigned ea1 : 1; unsigned cr : 1; unsigned dlcih: 6; unsigned ea2 : 1; unsigned de : 1; unsigned becn : 1; unsigned fecn : 1; unsigned dlcil: 4; }__attribute__ ((packed)) fr_hdr; 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 netdev; /* PVC net device - must be first */ struct net_device_stats stats; struct hdlc_device_struct *master; struct pvc_device_struct *next; u8 state; u8 newstate; }pvc_device; typedef struct { u32 last_errors; /* last errors bit list */ int last_poll; /* ! */ u8 T391; /* ! link integrity verification polling timer */ u8 T392; /* ! polling verification timer */ u8 N391; /* full status polling counter */ u8 N392; /* error threshold */ u8 N393; /* monitored events count */ u8 N391cnt; u8 state; /* ! */ u32 txseq; /* ! TX sequence number - Cisco uses 4 bytes */ u32 rxseq; /* ! RX sequence number */ }fr_lmi; /* ! means used in Cisco HDLC as well */ typedef struct hdlc_device_struct { /* to be initialized by hardware driver: */ struct net_device netdev; /* master net device - must be first */ struct net_device_stats stats; struct ppp_device pppdev; struct ppp_device *syncppp_ptr; /* set_mode may be NULL if HDLC-only board */ int (*set_mode)(struct hdlc_device_struct *hdlc, int mode); int (*open)(struct hdlc_device_struct *hdlc); void (*close)(struct hdlc_device_struct *hdlc); int (*xmit)(struct hdlc_device_struct *hdlc, struct sk_buff *skb); int (*ioctl)(struct hdlc_device_struct *hdlc, struct ifreq *ifr, int cmd); /* Only in "hardware" FR modes etc. - may be NULL */ int (*create_pvc)(pvc_device *pvc); void (*destroy_pvc)(pvc_device *pvc); int (*open_pvc)(pvc_device *pvc); void (*close_pvc)(pvc_device *pvc); /* for hdlc.c internal use only */ pvc_device *first_pvc; u16 pvc_count; int mode; struct timer_list timer; fr_lmi lmi; }hdlc_device; int register_hdlc_device(hdlc_device *hdlc); void unregister_hdlc_device(hdlc_device *hdlc); void hdlc_netif_rx(hdlc_device *hdlc, struct sk_buff *skb); static __inline__ struct net_device* hdlc_to_dev(hdlc_device *hdlc) { return &hdlc->netdev; } static __inline__ hdlc_device* dev_to_hdlc(struct net_device *dev) { return (hdlc_device*)dev; } static __inline__ struct net_device* pvc_to_dev(pvc_device *pvc) { return &pvc->netdev; } static __inline__ pvc_device* dev_to_pvc(struct net_device *dev) { return (pvc_device*)dev; } static __inline__ const char *hdlc_to_name(hdlc_device *hdlc) { return hdlc_to_dev(hdlc)->name; } static __inline__ const char *pvc_to_name(pvc_device *pvc) { return pvc_to_dev(pvc)->name; } static __inline__ u16 status_to_dlci(hdlc_device *hdlc, u8 *status, u8 *state) { *state &= ~(PVC_STATE_ACTIVE | PVC_STATE_NEW); if (status[2] & 0x08) *state |= PVC_STATE_NEW; else if (status[2] & 0x02) *state |= PVC_STATE_ACTIVE; return ((status[0] & 0x3F)<<4) | ((status[1] & 0x78)>>3); } static __inline__ void dlci_to_status(hdlc_device *hdlc, u16 dlci, u8 *status, u8 state) { status[0] = (dlci>>4) & 0x3F; status[1] = ((dlci<<3) & 0x78) | 0x80; status[2] = 0x80; if (state & PVC_STATE_NEW) status[2] |= 0x08; else if (state & PVC_STATE_ACTIVE) status[2] |= 0x02; } static __inline__ u16 netdev_dlci(struct net_device *dev) { return ntohs(*(u16*)dev->dev_addr); } static __inline__ u16 q922_to_dlci(u8 *hdr) { return ((hdr[0] & 0xFC)<<2) | ((hdr[1] & 0xF0)>>4); } static __inline__ void dlci_to_q922(u8 *hdr, u16 dlci) { hdr[0] = (dlci>>2) & 0xFC; hdr[1] = ((dlci<<4) & 0xF0) | 0x01; } static __inline__ int mode_is(hdlc_device *hdlc, int mask) { return (hdlc->mode & mask) == mask; } static __inline__ pvc_device* find_pvc(hdlc_device *hdlc, u16 dlci) { pvc_device *pvc=hdlc->first_pvc; while (pvc) { if (netdev_dlci(&pvc->netdev) == dlci) return pvc; pvc=pvc->next; } return NULL; } static __inline__ void debug_frame(const struct sk_buff *skb) { int i; for (i=0; ilen; i++) { if (i == 100) { printk("...\n"); return; } printk(" %02X", skb->data[i]); } printk("\n"); } #endif /* __KERNEL */ #endif /* __HDLC_H */