--- /dev/null
+/* Linux ISDN subsystem, network interface support code
+ *
+ * Copyright 1994-1998 by Fritz Elfert (fritz@isdn4linux.de)
+ * 1995,96 by Thinking Objects Software GmbH Wuerzburg
+ * 1995,96 by Michael Hipp (Michael.Hipp@student.uni-tuebingen.de)
+ * 1999-2002 by Kai Germaschewski <kai@germaschewski.name>
+ *
+ * This software may be used and distributed according to the terms
+ * of the GNU General Public License, incorporated herein by reference.
+ */
+
+#ifndef __ISDN_NET_LIB_H__
+#define __ISDN_NET_LIB_H__
+
+#include <linux/isdn.h>
+
+typedef struct isdn_net_local_s isdn_net_local;
+typedef struct isdn_net_dev_s isdn_net_dev;
+
+struct isdn_netif_ops {
+ int (*hard_start_xmit) (struct sk_buff *skb,
+ struct net_device *dev);
+ int (*hard_header) (struct sk_buff *skb,
+ struct net_device *dev,
+ unsigned short type,
+ void *daddr,
+ void *saddr,
+ unsigned len);
+ int (*do_ioctl)(struct net_device *dev,
+ struct ifreq *ifr, int cmd);
+
+ unsigned short flags; /* interface flags (a la BSD) */
+ unsigned short type; /* interface hardware type */
+ unsigned char addr_len;/* hardware address length */
+ void (*receive)(struct isdn_net_local_s *,
+ struct isdn_net_dev_s *,
+ struct sk_buff *);
+ void (*connected)(struct isdn_net_dev_s *);
+ void (*disconnected)(struct isdn_net_dev_s *);
+ int (*bind)(struct isdn_net_dev_s *);
+ void (*unbind)(struct isdn_net_dev_s *);
+ int (*init)(struct isdn_net_local_s *);
+ void (*cleanup)(struct isdn_net_local_s *);
+ int (*open)(struct isdn_net_local_s *);
+ void (*close)(struct isdn_net_local_s *);
+};
+
+/* our interface to isdn_common.c */
+void isdn_net_lib_init(void);
+void isdn_net_lib_exit(void);
+void isdn_net_hangup_all(void);
+int isdn_net_ioctl(struct inode *, struct file *, uint, ulong);
+int isdn_net_stat_callback(int, isdn_ctrl *);
+int isdn_net_find_icall(int, int, int, setup_parm *);
+int isdn_net_rcv_skb(int, struct sk_buff *);
+
+/* provided for interface types to use */
+void isdn_net_writebuf_skb(isdn_net_dev *, struct sk_buff *skb);
+void isdn_net_write_super(isdn_net_dev *, struct sk_buff *skb);
+void isdn_net_online(isdn_net_dev *idev);
+void isdn_net_offline(isdn_net_dev *idev);
+int isdn_net_start_xmit(struct sk_buff *skb, struct net_device *ndev);
+void isdn_netif_rx(isdn_net_dev *idev, struct sk_buff *skb, u16 protocol);
+isdn_net_dev *isdn_net_get_xmit_dev(isdn_net_local *mlp);
+int isdn_net_hangup(isdn_net_dev *);
+int isdn_net_autodial(struct sk_buff *skb, struct net_device *ndev);
+int isdn_net_dial_req(isdn_net_dev *);
+int register_isdn_netif(int encap, struct isdn_netif_ops *ops);
+
+/* ====================================================================== */
+
+/* per network interface data (dev->priv) */
+
+struct isdn_net_local_s {
+ ulong magic;
+ struct net_device_stats stats; /* Ethernet Statistics */
+ int flags; /* Connection-flags */
+ int dialmax; /* Max. Number of Dial-retries */
+ int dialtimeout; /* How long shall we try on dialing */
+ int dialwait; /* wait after failed attempt */
+
+ int cbdelay; /* Delay before Callback starts */
+ char msn[ISDN_MSNLEN]; /* MSNs/EAZs for this interface */
+
+ u_char cbhup; /* Flag: Reject Call before Callback*/
+ int hupflags; /* Flags for charge-unit-hangup: */
+ int onhtime; /* Time to keep link up */
+
+ u_char p_encap; /* Packet encapsulation */
+ u_char l2_proto; /* Layer-2-protocol */
+ u_char l3_proto; /* Layer-3-protocol */
+
+ ulong slavedelay; /* Dynamic bundling delaytime */
+ int triggercps; /* BogoCPS needed for trigger slave */
+ struct list_head phone[2]; /* List of remote-phonenumbers */
+ /* phone[0] = Incoming Numbers */
+ /* phone[1] = Outgoing Numbers */
+
+ struct list_head slaves; /* list of all bundled channels
+ protected by serializing config
+ ioctls / no change allowed when
+ interface is running */
+ struct list_head online; /* list of all bundled channels
+ which can be used for actual
+ data (IP) transfer
+ protected by xmit_lock */
+
+ spinlock_t xmit_lock; /* used to protect the xmit path of
+ a net_device, including all
+ associated channels's frame_cnt */
+ struct list_head running_devs; /* member of global running_devs */
+ atomic_t refcnt; /* references held by ISDN code */
+
+#ifdef CONFIG_ISDN_X25
+ struct concap_device_ops *dops; /* callbacks used by encapsulator */
+#endif
+#ifdef CONFIG_ISDN_PPP
+ unsigned int mp_cfg;
+ u32 mp_txseq;
+ struct sk_buff_head mp_frags; /* fragments sl list */
+ u32 mp_rxseq; /* last processed packet seq #: any
+ packets with smaller seq # will
+ be dropped unconditionally */
+ struct ippp_ccp *ccp;
+ unsigned long debug;
+#ifdef CONFIG_ISDN_PPP_VJ
+ unsigned char *cbuf;
+ struct slcompress *slcomp;
+#endif
+#endif
+
+ /* use an own struct for that in later versions */
+ ulong cisco_myseq; /* Local keepalive seq. for Cisco */
+ ulong cisco_mineseen; /* returned keepalive seq. from remote */
+ ulong cisco_yourseq; /* Remote keepalive seq. for Cisco */
+ int cisco_keepalive_period; /* keepalive period */
+ ulong cisco_last_slarp_in; /* jiffie of last keepalive packet we received */
+ char cisco_line_state; /* state of line according to keepalive packets */
+ char cisco_debserint; /* debugging flag of cisco hdlc with slarp */
+
+ struct timer_list cisco_timer;
+
+ struct isdn_netif_ops *ops;
+
+ struct net_device dev; /* interface to upper levels */
+};
+
+
+/* per ISDN channel (ISDN interface) data */
+
+struct isdn_net_dev_s {
+ int isdn_slot; /* Index to isdn device/channel */
+ int pre_device; /* Preselected isdn-device */
+ int pre_channel; /* Preselected isdn-channel */
+ int exclusive; /* -1 if non excl./idx to excl chan */
+
+ struct timer_list dial_timer; /* dial events timer */
+ struct fsm_inst fi; /* call control state machine */
+ int dial_event; /* event in case of timer expiry */
+ int dial; /* # of phone number just dialed */
+ int outgoing; /* Flag: outgoing call */
+ int dialretry; /* Counter for Dialout-retries */
+
+ int cps; /* current speed of this interface */
+ int transcount; /* byte-counter for cps-calculation */
+ int last_jiffies; /* when transcount was reset */
+ int sqfull; /* Flag: netdev-queue overloaded */
+ ulong sqfull_stamp; /* Start-Time of overload */
+
+ int huptimer; /* Timeout-counter for auto-hangup */
+ int charge; /* Counter for charging units */
+ int charge_state; /* ChargeInfo state machine */
+ unsigned long chargetime; /* Timer for Charging info */
+ int chargeint; /* Interval between charge-infos */
+
+ int pppbind; /* ippp device for bindings */
+ struct ipppd *ipppd; /* /dev/ipppX which controls us */
+
+ struct sk_buff_head super_tx_queue; /* List of supervisory frames to */
+ /* be transmitted asap */
+ int frame_cnt; /* number of frames currently */
+ /* queued in HL driver */
+ struct tasklet_struct tlet;
+
+ isdn_net_local *mlp; /* Ptr to master device for all devs*/
+
+ struct list_head slaves; /* member of local->slaves */
+ struct list_head online; /* member of local->online */
+
+ char name[10]; /* Name of device */
+ struct list_head global_list; /* global list of all isdn_net_devs */
+#ifdef CONFIG_ISDN_PPP
+ unsigned int pppcfg;
+ u32 mp_rxseq; /* last seq no seen on this channel */
+ struct ippp_ccp *ccp;
+ unsigned long debug;
+#endif
+#ifdef CONFIG_ISDN_X25
+ struct concap_proto *cprot; /* connection oriented encapsulation protocol */
+#endif
+
+};
+
+/* ====================================================================== */
+
+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;
+}
+
+
+#endif
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