patch-2.4.3 linux/include/linux/hdlc.h
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- Lines: 337
- Date:
Tue Mar 6 19:44:37 2001
- Orig file:
v2.4.2/linux/include/linux/hdlc.h
- Orig date:
Wed Dec 31 16:00:00 1969
diff -u --recursive --new-file v2.4.2/linux/include/linux/hdlc.h linux/include/linux/hdlc.h
@@ -0,0 +1,336 @@
+/*
+ * Generic HDLC support routines for Linux
+ *
+ * Copyright (C) 1999, 2000 Krzysztof Halasa <khc@pm.waw.pl>
+ *
+ * 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 <linux/skbuff.h>
+#include <linux/netdevice.h>
+#include <net/syncppp.h>
+
+#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);
+
+
+extern __inline__ struct net_device* hdlc_to_dev(hdlc_device *hdlc)
+{
+ return &hdlc->netdev;
+}
+
+
+extern __inline__ hdlc_device* dev_to_hdlc(struct net_device *dev)
+{
+ return (hdlc_device*)dev;
+}
+
+
+extern __inline__ struct net_device* pvc_to_dev(pvc_device *pvc)
+{
+ return &pvc->netdev;
+}
+
+
+extern __inline__ pvc_device* dev_to_pvc(struct net_device *dev)
+{
+ return (pvc_device*)dev;
+}
+
+
+extern __inline__ const char *hdlc_to_name(hdlc_device *hdlc)
+{
+ return hdlc_to_dev(hdlc)->name;
+}
+
+
+extern __inline__ const char *pvc_to_name(pvc_device *pvc)
+{
+ return pvc_to_dev(pvc)->name;
+}
+
+
+extern __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);
+}
+
+
+extern __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;
+}
+
+
+
+extern __inline__ u16 netdev_dlci(struct net_device *dev)
+{
+ return ntohs(*(u16*)dev->dev_addr);
+}
+
+
+
+extern __inline__ u16 q922_to_dlci(u8 *hdr)
+{
+ return ((hdr[0] & 0xFC)<<2) | ((hdr[1] & 0xF0)>>4);
+}
+
+
+
+extern __inline__ void dlci_to_q922(u8 *hdr, u16 dlci)
+{
+ hdr[0] = (dlci>>2) & 0xFC;
+ hdr[1] = ((dlci<<4) & 0xF0) | 0x01;
+}
+
+
+
+extern __inline__ int mode_is(hdlc_device *hdlc, int mask)
+{
+ return (hdlc->mode & mask) == mask;
+}
+
+
+
+extern __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;
+}
+
+
+
+extern __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");
+}
+
+
+#endif /* __KERNEL */
+#endif /* __HDLC_H */
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