mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-27 14:43:58 +08:00
249 lines
7.9 KiB
C
249 lines
7.9 KiB
C
/* Linux ISDN subsystem, sync PPP, interface to ipppd
|
|
*
|
|
* Copyright 1994-1999 by Fritz Elfert (fritz@isdn4linux.de)
|
|
* Copyright 1995,96 Thinking Objects Software GmbH Wuerzburg
|
|
* Copyright 1995,96 by Michael Hipp (Michael.Hipp@student.uni-tuebingen.de)
|
|
* Copyright 2000-2002 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 _LINUX_ISDN_PPP_H
|
|
#define _LINUX_ISDN_PPP_H
|
|
|
|
#define CALLTYPE_INCOMING 0x1
|
|
#define CALLTYPE_OUTGOING 0x2
|
|
#define CALLTYPE_CALLBACK 0x4
|
|
|
|
#define IPPP_VERSION "2.2.0"
|
|
|
|
struct pppcallinfo
|
|
{
|
|
int calltype;
|
|
unsigned char local_num[64];
|
|
unsigned char remote_num[64];
|
|
int charge_units;
|
|
};
|
|
|
|
#define PPPIOCGCALLINFO _IOWR('t',128,struct pppcallinfo)
|
|
#define PPPIOCBUNDLE _IOW('t',129,int)
|
|
#define PPPIOCGMPFLAGS _IOR('t',130,int)
|
|
#define PPPIOCSMPFLAGS _IOW('t',131,int)
|
|
#define PPPIOCSMPMTU _IOW('t',132,int)
|
|
#define PPPIOCSMPMRU _IOW('t',133,int)
|
|
#define PPPIOCGCOMPRESSORS _IOR('t',134,unsigned long [8])
|
|
#define PPPIOCSCOMPRESSOR _IOW('t',135,int)
|
|
#define PPPIOCGIFNAME _IOR('t',136, char [IFNAMSIZ] )
|
|
|
|
|
|
#define SC_MP_PROT 0x00000200
|
|
#define SC_REJ_MP_PROT 0x00000400
|
|
#define SC_OUT_SHORT_SEQ 0x00000800
|
|
#define SC_IN_SHORT_SEQ 0x00004000
|
|
|
|
#define SC_DECOMP_ON 0x01
|
|
#define SC_COMP_ON 0x02
|
|
#define SC_DECOMP_DISCARD 0x04
|
|
#define SC_COMP_DISCARD 0x08
|
|
#define SC_LINK_DECOMP_ON 0x10
|
|
#define SC_LINK_COMP_ON 0x20
|
|
#define SC_LINK_DECOMP_DISCARD 0x40
|
|
#define SC_LINK_COMP_DISCARD 0x80
|
|
|
|
#define ISDN_PPP_COMP_MAX_OPTIONS 16
|
|
|
|
#define IPPP_COMP_FLAG_XMIT 0x1
|
|
#define IPPP_COMP_FLAG_LINK 0x2
|
|
|
|
struct isdn_ppp_comp_data {
|
|
int num;
|
|
unsigned char options[ISDN_PPP_COMP_MAX_OPTIONS];
|
|
int optlen;
|
|
int flags;
|
|
};
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
|
|
|
|
#ifdef CONFIG_IPPP_FILTER
|
|
#include <linux/filter.h>
|
|
#endif
|
|
|
|
#define DECOMP_ERR_NOMEM (-10)
|
|
|
|
#define MP_END_FRAG 0x40
|
|
#define MP_BEGIN_FRAG 0x80
|
|
|
|
#define MP_MAX_QUEUE_LEN 16
|
|
|
|
/*
|
|
* We need a way for the decompressor to influence the generation of CCP
|
|
* Reset-Requests in a variety of ways. The decompressor is already returning
|
|
* a lot of information (generated skb length, error conditions) so we use
|
|
* another parameter. This parameter is a pointer to a structure which is
|
|
* to be marked valid by the decompressor and only in this case is ever used.
|
|
* Furthermore, the only case where this data is used is when the decom-
|
|
* pressor returns DECOMP_ERROR.
|
|
*
|
|
* We use this same struct for the reset entry of the compressor to commu-
|
|
* nicate to its caller how to deal with sending of a Reset Ack. In this
|
|
* case, expra is not used, but other options still apply (suppressing
|
|
* sending with rsend, appending arbitrary data, etc).
|
|
*/
|
|
|
|
#define IPPP_RESET_MAXDATABYTES 32
|
|
|
|
struct isdn_ppp_resetparams {
|
|
unsigned char valid:1; /* rw Is this structure filled at all ? */
|
|
unsigned char rsend:1; /* rw Should we send one at all ? */
|
|
unsigned char idval:1; /* rw Is the id field valid ? */
|
|
unsigned char dtval:1; /* rw Is the data field valid ? */
|
|
unsigned char expra:1; /* rw Is an Ack expected for this Req ? */
|
|
unsigned char id; /* wo Send CCP ResetReq with this id */
|
|
unsigned short maxdlen; /* ro Max bytes to be stored in data field */
|
|
unsigned short dlen; /* rw Bytes stored in data field */
|
|
unsigned char *data; /* wo Data for ResetReq info field */
|
|
};
|
|
|
|
/*
|
|
* this is an 'old friend' from ppp-comp.h under a new name
|
|
* check the original include for more information
|
|
*/
|
|
struct isdn_ppp_compressor {
|
|
struct isdn_ppp_compressor *next, *prev;
|
|
struct module *owner;
|
|
int num; /* CCP compression protocol number */
|
|
|
|
void *(*alloc) (struct isdn_ppp_comp_data *);
|
|
void (*free) (void *state);
|
|
int (*init) (void *state, struct isdn_ppp_comp_data *,
|
|
int unit,int debug);
|
|
|
|
/* The reset entry needs to get more exact information about the
|
|
ResetReq or ResetAck it was called with. The parameters are
|
|
obvious. If reset is called without a Req or Ack frame which
|
|
could be handed into it, code MUST be set to 0. Using rsparm,
|
|
the reset entry can control if and how a ResetAck is returned. */
|
|
|
|
void (*reset) (void *state, unsigned char code, unsigned char id,
|
|
unsigned char *data, unsigned len,
|
|
struct isdn_ppp_resetparams *rsparm);
|
|
|
|
int (*compress) (void *state, struct sk_buff *in,
|
|
struct sk_buff *skb_out, int proto);
|
|
|
|
int (*decompress) (void *state,struct sk_buff *in,
|
|
struct sk_buff *skb_out,
|
|
struct isdn_ppp_resetparams *rsparm);
|
|
|
|
void (*incomp) (void *state, struct sk_buff *in,int proto);
|
|
void (*stat) (void *state, struct compstat *stats);
|
|
};
|
|
|
|
extern int isdn_ppp_register_compressor(struct isdn_ppp_compressor *);
|
|
extern int isdn_ppp_unregister_compressor(struct isdn_ppp_compressor *);
|
|
extern int isdn_ppp_dial_slave(char *);
|
|
extern int isdn_ppp_hangup_slave(char *);
|
|
|
|
typedef struct {
|
|
unsigned long seqerrs;
|
|
unsigned long frame_drops;
|
|
unsigned long overflows;
|
|
unsigned long max_queue_len;
|
|
} isdn_mppp_stats;
|
|
|
|
typedef struct {
|
|
int mp_mrru; /* unused */
|
|
struct sk_buff * frags; /* fragments sl list -- use skb->next */
|
|
long frames; /* number of frames in the frame list */
|
|
unsigned int seq; /* last processed packet seq #: any packets
|
|
* with smaller seq # will be dropped
|
|
* unconditionally */
|
|
spinlock_t lock;
|
|
int ref_ct;
|
|
/* statistics */
|
|
isdn_mppp_stats stats;
|
|
} ippp_bundle;
|
|
|
|
#define NUM_RCV_BUFFS 64
|
|
|
|
struct ippp_buf_queue {
|
|
struct ippp_buf_queue *next;
|
|
struct ippp_buf_queue *last;
|
|
char *buf; /* NULL here indicates end of queue */
|
|
int len;
|
|
};
|
|
|
|
/* The data structure for one CCP reset transaction */
|
|
enum ippp_ccp_reset_states {
|
|
CCPResetIdle,
|
|
CCPResetSentReq,
|
|
CCPResetRcvdReq,
|
|
CCPResetSentAck,
|
|
CCPResetRcvdAck
|
|
};
|
|
|
|
struct ippp_ccp_reset_state {
|
|
enum ippp_ccp_reset_states state; /* State of this transaction */
|
|
struct ippp_struct *is; /* Backlink to device stuff */
|
|
unsigned char id; /* Backlink id index */
|
|
unsigned char ta:1; /* The timer is active (flag) */
|
|
unsigned char expra:1; /* We expect a ResetAck at all */
|
|
int dlen; /* Databytes stored in data */
|
|
struct timer_list timer; /* For timeouts/retries */
|
|
/* This is a hack but seems sufficient for the moment. We do not want
|
|
to have this be yet another allocation for some bytes, it is more
|
|
memory management overhead than the whole mess is worth. */
|
|
unsigned char data[IPPP_RESET_MAXDATABYTES];
|
|
};
|
|
|
|
/* The data structure keeping track of the currently outstanding CCP Reset
|
|
transactions. */
|
|
struct ippp_ccp_reset {
|
|
struct ippp_ccp_reset_state *rs[256]; /* One per possible id */
|
|
unsigned char lastid; /* Last id allocated by the engine */
|
|
};
|
|
|
|
struct ippp_struct {
|
|
struct ippp_struct *next_link;
|
|
int state;
|
|
spinlock_t buflock;
|
|
struct ippp_buf_queue rq[NUM_RCV_BUFFS]; /* packet queue for isdn_ppp_read() */
|
|
struct ippp_buf_queue *first; /* pointer to (current) first packet */
|
|
struct ippp_buf_queue *last; /* pointer to (current) last used packet in queue */
|
|
wait_queue_head_t wq;
|
|
struct task_struct *tk;
|
|
unsigned int mpppcfg;
|
|
unsigned int pppcfg;
|
|
unsigned int mru;
|
|
unsigned int mpmru;
|
|
unsigned int mpmtu;
|
|
unsigned int maxcid;
|
|
struct isdn_net_local_s *lp;
|
|
int unit;
|
|
int minor;
|
|
unsigned int last_link_seqno;
|
|
long mp_seqno;
|
|
#ifdef CONFIG_ISDN_PPP_VJ
|
|
unsigned char *cbuf;
|
|
struct slcompress *slcomp;
|
|
#endif
|
|
#ifdef CONFIG_IPPP_FILTER
|
|
struct sock_filter *pass_filter; /* filter for packets to pass */
|
|
struct sock_filter *active_filter; /* filter for pkts to reset idle */
|
|
unsigned pass_len, active_len;
|
|
#endif
|
|
unsigned long debug;
|
|
struct isdn_ppp_compressor *compressor,*decompressor;
|
|
struct isdn_ppp_compressor *link_compressor,*link_decompressor;
|
|
void *decomp_stat,*comp_stat,*link_decomp_stat,*link_comp_stat;
|
|
struct ippp_ccp_reset *reset; /* Allocated on demand, may never be needed */
|
|
unsigned long compflags;
|
|
};
|
|
|
|
#endif /* __KERNEL__ */
|
|
#endif /* _LINUX_ISDN_PPP_H */
|