#ifndef _LINUX_IF_PPP_H #define _LINUX_IF_PPP_H /* definitions for kernel PPP module Michael Callahan Nov. 4 1993 */ /* how many PPP units? */ #ifdef CONFIG_PPP_LOTS #define PPP_NRUNIT 16 #else #define PPP_NRUNIT 4 #endif #define PPP_VERSION "0.2.7" /* line discipline number */ #define N_PPP 3 /* Magic value for the ppp structure */ #define PPP_MAGIC 0x5002 #define PPPIOCGFLAGS 0x5490 /* get configuration flags */ #define PPPIOCSFLAGS 0x5491 /* set configuration flags */ #define PPPIOCGASYNCMAP 0x5492 /* get async map */ #define PPPIOCSASYNCMAP 0x5493 /* set async map */ #define PPPIOCGUNIT 0x5494 /* get ppp unit number */ #define PPPIOCSINPSIG 0x5495 /* set input ready signal */ #define PPPIOCSDEBUG 0x5497 /* set debug level */ #define PPPIOCGDEBUG 0x5498 /* get debug level */ #define PPPIOCGSTAT 0x5499 /* read PPP statistic information */ #define PPPIOCGTIME 0x549A /* read time delta information */ #define PPPIOCGXASYNCMAP 0x549B /* get async table */ #define PPPIOCSXASYNCMAP 0x549C /* set async table */ #define PPPIOCSMRU 0x549D /* set receive unit size for PPP */ #define PPPIOCRASYNCMAP 0x549E /* set receive async map */ #define PPPIOCSMAXCID 0x549F /* set the maximum compression slot id */ /* special characters in the framing protocol */ #define PPP_ALLSTATIONS 0xff /* All-Stations broadcast address */ #define PPP_UI 0x03 /* Unnumbered Information */ #define PPP_FLAG 0x7E /* frame delimiter -- marks frame boundaries */ #define PPP_ADDRESS 0xFF /* first character of frame <-- (may be */ #define PPP_CONTROL 0x03 /* second character of frame <-- compressed)*/ #define PPP_TRANS 0x20 /* Asynchronous transparency modifier */ #define PPP_ESC 0x7d /* escape character -- next character is data, and the PPP_TRANS bit should be toggled. PPP_ESC PPP_FLAG is illegal */ /* protocol numbers */ #define PROTO_IP 0x0021 #define PROTO_VJCOMP 0x002d #define PROTO_VJUNCOMP 0x002f /* FCS support */ #define PPP_FCS_INIT 0xffff #define PPP_FCS_GOOD 0xf0b8 /* initial MTU */ #define PPP_MTU 1500 /* initial MRU */ #define PPP_MRU PPP_MTU /* flags */ #define SC_COMP_PROT 0x00000001 /* protocol compression (output) */ #define SC_COMP_AC 0x00000002 /* header compression (output) */ #define SC_COMP_TCP 0x00000004 /* TCP (VJ) compression (output) */ #define SC_NO_TCP_CCID 0x00000008 /* disable VJ connection-id comp. */ #define SC_REJ_COMP_AC 0x00000010 /* reject adrs/ctrl comp. on input */ #define SC_REJ_COMP_TCP 0x00000020 /* reject TCP (VJ) comp. on input */ #define SC_ENABLE_IP 0x00000100 /* IP packets may be exchanged */ #define SC_IP_DOWN 0x00000200 /* give ip frames to pppd */ #define SC_IP_FLUSH 0x00000400 /* "next time" flag for IP_DOWN */ #define SC_DEBUG 0x00010000 /* enable debug messages */ #define SC_LOG_INPKT 0x00020000 /* log contents of good pkts recvd */ #define SC_LOG_OUTPKT 0x00040000 /* log contents of pkts sent */ #define SC_LOG_RAWIN 0x00080000 /* log all chars received */ #define SC_LOG_FLUSH 0x00100000 /* log all chars flushed */ /* Flag bits to determine state of input characters */ #define SC_RCV_B7_0 0x01000000 /* have rcvd char with bit 7 = 0 */ #define SC_RCV_B7_1 0x02000000 /* have rcvd char with bit 7 = 0 */ #define SC_RCV_EVNP 0x04000000 /* have rcvd char with even parity */ #define SC_RCV_ODDP 0x08000000 /* have rcvd char with odd parity */ #define SC_MASK 0x0fffffff /* bits that user can change */ /* flag for doing transmitter lockout */ #define SC_XMIT_BUSY 0x10000000 /* ppp_write_wakeup is active */ /* * This is the format of the data buffer of a LQP packet. The packet data * is sent/received to the peer. */ struct ppp_lqp_packet_hdr { __u32 LastOutLQRs; /* Copied from PeerOutLQRs */ __u32 LastOutPackets; /* Copied from PeerOutPackets */ __u32 LastOutOctets; /* Copied from PeerOutOctets */ __u32 PeerInLQRs; /* Copied from SavedInLQRs */ __u32 PeerInPackets; /* Copied from SavedInPackets */ __u32 PeerInDiscards; /* Copied from SavedInDiscards */ __u32 PeerInErrors; /* Copied from SavedInErrors */ __u32 PeerInOctets; /* Copied from SavedInOctets */ __u32 PeerOutLQRs; /* Copied from OutLQRs, plus 1 */ __u32 PeerOutPackets; /* Current ifOutUniPackets, + 1 */ __u32 PeerOutOctets; /* Current ifOutOctets + LQR */ }; /* * This data is not sent to the remote. It is updated by the driver when * a packet is received. */ struct ppp_lqp_packet_trailer { __u32 SaveInLQRs; /* Current InLQRs on reception */ __u32 SaveInPackets; /* Current ifInUniPackets */ __u32 SaveInDiscards; /* Current ifInDiscards */ __u32 SaveInErrors; /* Current ifInErrors */ __u32 SaveInOctets; /* Current ifInOctects */ }; /* * PPP LQP packet. The packet is changed by the driver immediately prior * to transmission and updated upon reception with the current values. * So, it must be known to the driver as well as the pppd software. */ struct ppp_lpq_packet { __u32 magic; /* current magic value */ struct ppp_lqp_packet_hdr hdr; /* Header fields for structure */ struct ppp_lqp_packet_trailer tail; /* Trailer fields (not sent) */ }; /* * PPP interface statistics. (used by LQP / pppstats) */ struct ppp_stats { __u32 rbytes; /* bytes received */ __u32 rcomp; /* compressed packets received */ __u32 runcomp; /* uncompressed packets received */ __u32 rothers; /* non-ip frames received */ __u32 rerrors; /* received errors */ __u32 roverrun; /* "buffer overrun" counter */ __u32 tossed; /* packets discarded */ __u32 runts; /* frames too short to process */ __u32 rgiants; /* frames too large to process */ __u32 sbytes; /* bytes sent */ __u32 scomp; /* compressed packets sent */ __u32 suncomp; /* uncompressed packets sent */ __u32 sothers; /* non-ip frames sent */ __u32 serrors; /* transmitter errors */ __u32 sbusy; /* "transmitter busy" counter */ }; /* * Demand dial fields */ struct ppp_ddinfo { unsigned long ip_sjiffies; /* time when last IP frame sent */ unsigned long ip_rjiffies; /* time when last IP frame recvd*/ unsigned long nip_sjiffies; /* time when last NON-IP sent */ unsigned long nip_rjiffies; /* time when last NON-IP recvd */ }; #ifdef __KERNEL__ struct ppp { int magic; /* magic value for structure */ /* Bitmapped flag fields. */ char sending; /* "channel busy" indicator */ char escape; /* 0x20 if prev char was PPP_ESC*/ char toss; /* toss this frame */ unsigned long inuse; /* are we allocated? */ unsigned int flags; /* miscellany */ __u32 xmit_async_map[8]; /* 1 bit means that given control character is quoted on output*/ __u32 recv_async_map; /* 1 bit means that given control character is ignored on input*/ int mtu; /* maximum xmit frame size */ int mru; /* maximum receive frame size */ unsigned short fcs; /* FCS field of current frame */ /* Various fields. */ int line; /* PPP channel number */ struct tty_struct *tty; /* ptr to TTY structure */ struct device *dev; /* easy for intr handling */ struct slcompress *slcomp; /* for header compression */ unsigned long last_xmit; /* time of last transmission */ /* These are pointers to the malloc()ed frame buffers. These buffers are used while processing a packet. If a packet has to hang around for the user process to read it, it lingers in the user buffers below. */ unsigned char *rbuff; /* receiver buffer */ unsigned char *xbuff; /* transmitter buffer */ unsigned char *cbuff; /* compression buffer */ /* These are the various pointers into the buffers. */ unsigned char *rhead; /* RECV buffer pointer (head) */ unsigned char *rend; /* RECV buffer pointer (end) */ int rcount; /* PPP receive counter */ unsigned char *xhead; /* XMIT buffer pointer (head) */ unsigned char *xtail; /* XMIT buffer pointer (end) */ /* Structures for interfacing with the user process. */ #define RBUFSIZE 4000 unsigned char *us_rbuff; /* circular incoming packet buf.*/ unsigned char *us_rbuff_end; /* end of allocated space */ unsigned char *us_rbuff_head; /* head of waiting packets */ unsigned char *us_rbuff_tail; /* tail of waiting packets */ unsigned long us_rbuff_lock; /* lock: bit 0 head bit 1 tail */ int inp_sig; /* input ready signal for pgrp */ int inp_sig_pid; /* process to get notified */ /* items to support the select() function */ struct wait_queue *write_wait; /* queue for reading processes */ struct wait_queue *read_wait; /* queue for writing processes */ /* PPP interface statistics. */ struct ppp_stats stats; /* statistic information */ /* PPP demand dial information. */ struct ppp_ddinfo ddinfo; /* demand dial information */ }; #endif /* __KERNEL__ */ #endif /* _LINUX_PPP_H */