From: Paul Mackerras Date: Thu, 8 Dec 1994 01:59:58 +0000 (+0000) Subject: Initial revision X-Git-Tag: RELEASE_2_3_6~801 X-Git-Url: http://git.ozlabs.org/?p=ppp.git;a=commitdiff_plain;h=eab0d24f3ee832231aa5ba844775e84084c392c3;ds=sidebyside Initial revision --- diff --git a/include/linux/if_ppp.h b/include/linux/if_ppp.h new file mode 100644 index 0000000..02c119a --- /dev/null +++ b/include/linux/if_ppp.h @@ -0,0 +1,124 @@ +/* $Id: if_ppp.h,v 1.1 1994/12/08 01:59:58 paulus Exp $ */ + +/* + * if_ppp.h - Point-to-Point Protocol definitions. + * + * Copyright (c) 1989 Carnegie Mellon University. + * All rights reserved. + * + * Redistribution and use in source and binary forms are permitted + * provided that the above copyright notice and this paragraph are + * duplicated in all such forms and that any documentation, + * advertising materials, and other materials related to such + * distribution and use acknowledge that the software was developed + * by Carnegie Mellon University. The name of the + * University may not be used to endorse or promote products derived + * from this software without specific prior written permission. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. + */ + +#ifndef _IF_PPP_H_ +#define _IF_PPP_H_ + +/* + * Packet sizes + */ + +#define PPP_MTU 1500 /* Default MTU (size of Info field) */ +#define PPP_MAXMRU 65000 /* Largest MRU we allow */ +#define PPP_NRUNIT 4 /* how many PPP units? */ +#define PPP_VERSION "2.2.0" +#define PPP_MAGIC 0x5002 /* Magic value for the ppp structure */ +#define PROTO_IPX 0x002b /* protocol numbers */ + +/* + * Bit definitions for 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_CCP_OPEN 0x00000040 /* Look at CCP packets */ +#define SC_CCP_UP 0x00000080 /* May send/recv compressed packets */ +#define SC_ENABLE_IP 0x00000100 /* IP packets may be exchanged */ +#define SC_COMP_RUN 0x00001000 /* compressor has been inited */ +#define SC_DECOMP_RUN 0x00002000 /* decompressor has been inited */ +#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 */ +#define SC_MASK 0x0fffffff /* bits that user can change */ + +/* state bits */ +#define SC_ESCAPED 0x80000000 /* saw a PPP_ESCAPE */ +#define SC_FLUSH 0x40000000 /* flush input until next PPP_FLAG */ +#define SC_VJ_RESET 0x20000000 /* Need to reset the VJ decompressor */ +#define SC_XMIT_BUSY 0x10000000 /* ppp_write_wakeup is active */ +#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 = 1 */ +#define SC_RCV_EVNP 0x04000000 /* have rcvd char with even parity */ +#define SC_RCV_ODDP 0x08000000 /* have rcvd char with odd parity */ +#define SC_DC_ERROR 0x00400000 /* non-fatal decomp error detected */ +#define SC_DC_FERROR 0x00800000 /* fatal decomp error detected */ + +/* + * Ioctl definitions. + */ + +struct npioctl { + int protocol; /* PPP procotol, e.g. PPP_IP */ + enum NPmode mode; +}; + +/* Structure describing a CCP configuration option, for PPPIOCSCOMPRESS */ +struct ppp_option_data { + u_char *ptr; + u_int length; + int transmit; +}; + +struct ifpppstatsreq { + char ifr__name[IFNAMSIZ]; /* Name of the device */ + struct ppp_stats *stats_ptr; /* Pointer to stats buffer */ + struct ppp_stats stats; /* statistic information */ +}; + +/* + * Ioctl definitions. + */ + +#define PPPIOCGFLAGS _IOR('t', 90, int) /* get configuration flags */ +#define PPPIOCSFLAGS _IOW('t', 89, int) /* set configuration flags */ +#define PPPIOCGASYNCMAP _IOR('t', 88, int) /* get async map */ +#define PPPIOCSASYNCMAP _IOW('t', 87, int) /* set async map */ +#define PPPIOCGUNIT _IOR('t', 86, int) /* get ppp unit number */ +#define PPPIOCGRASYNCMAP _IOR('t', 85, int) /* get receive async map */ +#define PPPIOCSRASYNCMAP _IOW('t', 84, int) /* set receive async map */ +#define PPPIOCGMRU _IOR('t', 83, int) /* get max receive unit */ +#define PPPIOCSMRU _IOW('t', 82, int) /* set max receive unit */ +#define PPPIOCSMAXCID _IOW('t', 81, int) /* set VJ max slot ID */ +#define PPPIOCGXASYNCMAP _IOR('t', 80, ext_accm) /* get extended ACCM */ +#define PPPIOCSXASYNCMAP _IOW('t', 79, ext_accm) /* set extended ACCM */ +#define PPPIOCXFERUNIT _IO('t', 78) /* transfer PPP unit */ +#define PPPIOCSCOMPRESS _IOW('t', 77, struct ppp_option_data) +#define PPPIOCGNPMODE _IOWR('t', 76, struct npioctl) /* get NP mode */ +#define PPPIOCSNPMODE _IOW('t', 75, struct npioctl) /* set NP mode */ + +#define PPPIOCGDEBUG _IOR('t', 65, int) /* Read debug level */ +#define PPPIOCSDEBUG _IOW('t', 64, int) /* Set debug level */ +#define PPPIOCGTIME _IOR('t', 63, struct ppp_ddinfo) /* Read time info */ + +#define SIOCGPPPSTATS (SIOCDEVPRIVATE + 0) +#define SIOCGPPPVER (SIOCDEVPRIVATE + 1) + +#if !defined(ifr_mtu) +#define ifr_mtu ifr_ifru.ifru_metric +#endif + +#endif /* _IF_PPP_H_ */ diff --git a/include/linux/if_pppvar.h b/include/linux/if_pppvar.h new file mode 100644 index 0000000..0c6a39b --- /dev/null +++ b/include/linux/if_pppvar.h @@ -0,0 +1,142 @@ +/* $Id: if_pppvar.h,v 1.1 1994/12/08 01:59:58 paulus Exp $ */ +/* + * if_pppvar.h - private structures and declarations for PPP. + * + * Copyright (c) 1994 The Australian National University. + * All rights reserved. + * + * Permission to use, copy, modify, and distribute this software and its + * documentation is hereby granted, provided that the above copyright + * notice appears in all copies. This software is provided without any + * warranty, express or implied. The Australian National University + * makes no representations about the suitability of this software for + * any purpose. + * + * IN NO EVENT SHALL THE AUSTRALIAN NATIONAL UNIVERSITY BE LIABLE TO ANY + * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES + * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF + * THE AUSTRALIAN NATIONAL UNIVERSITY HAVE BEEN ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * THE AUSTRALIAN NATIONAL UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES, + * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY + * AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS + * ON AN "AS IS" BASIS, AND THE AUSTRALIAN NATIONAL UNIVERSITY HAS NO + * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, + * OR MODIFICATIONS. + * + * Copyright (c) 1989 Carnegie Mellon University. + * All rights reserved. + * + * Redistribution and use in source and binary forms are permitted + * provided that the above copyright notice and this paragraph are + * duplicated in all such forms and that any documentation, + * advertising materials, and other materials related to such + * distribution and use acknowledge that the software was developed + * by Carnegie Mellon University. The name of the + * University may not be used to endorse or promote products derived + * from this software without specific prior written permission. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. + */ + +/* + * Supported network protocols. These values are used for + * indexing sc_npmode. + */ + +#define NP_IP 0 /* Internet Protocol */ +#define NUM_NP 1 /* Number of NPs. */ + +/* + * Buffers for the PPP process have the following structure + */ + +#define RBUFSIZE 2048 /* MUST be a power of 2 and be <= 4095 */ +struct ppp_buffer { + int size; /* Size of the buffer area */ + int count; /* Count of characters in bufr */ + int head; /* index to head of list */ + int tail; /* index to tail of list */ + int locked; /* Buffer is being sent */ + int type; /* Type of the buffer */ + /* =0, device read buffer */ + /* =1, device write buffer */ + /* =2, daemon write buffer */ + /* =3, daemon read buffer */ + unsigned short fcs; /* Frame Check Sequence (CRC) */ +}; + +/* Given a pointer to the ppp_buffer then return base address of buffer */ +#define buf_base(buf) ((u_char *) (&buf[1])) + +/* + * Structure describing each ppp unit. + */ + +struct ppp { + int magic; /* magic value for structure */ + + /* Bitmapped flag fields. */ + char inuse; /* are we allocated? */ + char escape; /* 0x20 if prev char was PPP_ESC*/ + char toss; /* toss this frame */ + + unsigned int flags; /* miscellany */ + + ext_accm xmit_async_map; /* 1 bit means that given control + character is quoted on output*/ + + unsigned long 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 */ + + /* Information about the current tty data */ + int line; /* PPP channel number */ + struct tty_struct *tty; /* ptr to TTY structure */ + int bytes_sent; /* Bytes sent on frame */ + int bytes_rcvd; /* Bytes recvd on frame */ + + /* Interface to the network layer */ + struct device *dev; /* easy for intr handling */ + + /* VJ Header compression data */ + struct slcompress *slcomp;/* for header compression */ + + /* Transmission information */ + struct ppp_buffer *xbuf; /* Buffer currently being sent */ + struct ppp_buffer *s1buf; /* Pointer to daemon buffer */ + struct ppp_buffer *s2buf; /* Pointer to device buffer */ + + 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. */ + + struct ppp_buffer *wbuf; /* Transmission information */ + struct ppp_buffer *tbuf; /* daemon transmission buffer */ + struct ppp_buffer *rbuf; /* Receive information */ + struct ppp_buffer *ubuf; /* User buffer information */ + struct ppp_buffer *cbuf; /* compression buffer */ + + /* Queues for select() functionality */ + struct wait_queue *write_wait; /* queue for reading processes */ + struct wait_queue *read_wait; /* queue for writing processes */ + + /* Statistic information */ + struct pppstat p; /* statistic information */ + struct ppp_ddinfo ddinfo; /* demand dial information */ + + /* PPP compression protocol information */ + u_int sc_bytessent; /* count of octets sent */ + u_int sc_bytesrcvd; /* count of octets received */ + enum NPmode sc_npmode[NUM_NP]; /* what to do with each NP */ + struct compressor *sc_xcomp; /* transmit compressor */ + void *sc_xc_state; /* transmit compressor state */ + struct compressor *sc_rcomp; /* receive decompressor */ + void *sc_rc_state; /* receive decompressor state */ +}; diff --git a/linux/if_ppp.h b/linux/if_ppp.h new file mode 100644 index 0000000..02c119a --- /dev/null +++ b/linux/if_ppp.h @@ -0,0 +1,124 @@ +/* $Id: if_ppp.h,v 1.1 1994/12/08 01:59:58 paulus Exp $ */ + +/* + * if_ppp.h - Point-to-Point Protocol definitions. + * + * Copyright (c) 1989 Carnegie Mellon University. + * All rights reserved. + * + * Redistribution and use in source and binary forms are permitted + * provided that the above copyright notice and this paragraph are + * duplicated in all such forms and that any documentation, + * advertising materials, and other materials related to such + * distribution and use acknowledge that the software was developed + * by Carnegie Mellon University. The name of the + * University may not be used to endorse or promote products derived + * from this software without specific prior written permission. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. + */ + +#ifndef _IF_PPP_H_ +#define _IF_PPP_H_ + +/* + * Packet sizes + */ + +#define PPP_MTU 1500 /* Default MTU (size of Info field) */ +#define PPP_MAXMRU 65000 /* Largest MRU we allow */ +#define PPP_NRUNIT 4 /* how many PPP units? */ +#define PPP_VERSION "2.2.0" +#define PPP_MAGIC 0x5002 /* Magic value for the ppp structure */ +#define PROTO_IPX 0x002b /* protocol numbers */ + +/* + * Bit definitions for 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_CCP_OPEN 0x00000040 /* Look at CCP packets */ +#define SC_CCP_UP 0x00000080 /* May send/recv compressed packets */ +#define SC_ENABLE_IP 0x00000100 /* IP packets may be exchanged */ +#define SC_COMP_RUN 0x00001000 /* compressor has been inited */ +#define SC_DECOMP_RUN 0x00002000 /* decompressor has been inited */ +#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 */ +#define SC_MASK 0x0fffffff /* bits that user can change */ + +/* state bits */ +#define SC_ESCAPED 0x80000000 /* saw a PPP_ESCAPE */ +#define SC_FLUSH 0x40000000 /* flush input until next PPP_FLAG */ +#define SC_VJ_RESET 0x20000000 /* Need to reset the VJ decompressor */ +#define SC_XMIT_BUSY 0x10000000 /* ppp_write_wakeup is active */ +#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 = 1 */ +#define SC_RCV_EVNP 0x04000000 /* have rcvd char with even parity */ +#define SC_RCV_ODDP 0x08000000 /* have rcvd char with odd parity */ +#define SC_DC_ERROR 0x00400000 /* non-fatal decomp error detected */ +#define SC_DC_FERROR 0x00800000 /* fatal decomp error detected */ + +/* + * Ioctl definitions. + */ + +struct npioctl { + int protocol; /* PPP procotol, e.g. PPP_IP */ + enum NPmode mode; +}; + +/* Structure describing a CCP configuration option, for PPPIOCSCOMPRESS */ +struct ppp_option_data { + u_char *ptr; + u_int length; + int transmit; +}; + +struct ifpppstatsreq { + char ifr__name[IFNAMSIZ]; /* Name of the device */ + struct ppp_stats *stats_ptr; /* Pointer to stats buffer */ + struct ppp_stats stats; /* statistic information */ +}; + +/* + * Ioctl definitions. + */ + +#define PPPIOCGFLAGS _IOR('t', 90, int) /* get configuration flags */ +#define PPPIOCSFLAGS _IOW('t', 89, int) /* set configuration flags */ +#define PPPIOCGASYNCMAP _IOR('t', 88, int) /* get async map */ +#define PPPIOCSASYNCMAP _IOW('t', 87, int) /* set async map */ +#define PPPIOCGUNIT _IOR('t', 86, int) /* get ppp unit number */ +#define PPPIOCGRASYNCMAP _IOR('t', 85, int) /* get receive async map */ +#define PPPIOCSRASYNCMAP _IOW('t', 84, int) /* set receive async map */ +#define PPPIOCGMRU _IOR('t', 83, int) /* get max receive unit */ +#define PPPIOCSMRU _IOW('t', 82, int) /* set max receive unit */ +#define PPPIOCSMAXCID _IOW('t', 81, int) /* set VJ max slot ID */ +#define PPPIOCGXASYNCMAP _IOR('t', 80, ext_accm) /* get extended ACCM */ +#define PPPIOCSXASYNCMAP _IOW('t', 79, ext_accm) /* set extended ACCM */ +#define PPPIOCXFERUNIT _IO('t', 78) /* transfer PPP unit */ +#define PPPIOCSCOMPRESS _IOW('t', 77, struct ppp_option_data) +#define PPPIOCGNPMODE _IOWR('t', 76, struct npioctl) /* get NP mode */ +#define PPPIOCSNPMODE _IOW('t', 75, struct npioctl) /* set NP mode */ + +#define PPPIOCGDEBUG _IOR('t', 65, int) /* Read debug level */ +#define PPPIOCSDEBUG _IOW('t', 64, int) /* Set debug level */ +#define PPPIOCGTIME _IOR('t', 63, struct ppp_ddinfo) /* Read time info */ + +#define SIOCGPPPSTATS (SIOCDEVPRIVATE + 0) +#define SIOCGPPPVER (SIOCDEVPRIVATE + 1) + +#if !defined(ifr_mtu) +#define ifr_mtu ifr_ifru.ifru_metric +#endif + +#endif /* _IF_PPP_H_ */ diff --git a/linux/if_pppvar.h b/linux/if_pppvar.h new file mode 100644 index 0000000..0c6a39b --- /dev/null +++ b/linux/if_pppvar.h @@ -0,0 +1,142 @@ +/* $Id: if_pppvar.h,v 1.1 1994/12/08 01:59:58 paulus Exp $ */ +/* + * if_pppvar.h - private structures and declarations for PPP. + * + * Copyright (c) 1994 The Australian National University. + * All rights reserved. + * + * Permission to use, copy, modify, and distribute this software and its + * documentation is hereby granted, provided that the above copyright + * notice appears in all copies. This software is provided without any + * warranty, express or implied. The Australian National University + * makes no representations about the suitability of this software for + * any purpose. + * + * IN NO EVENT SHALL THE AUSTRALIAN NATIONAL UNIVERSITY BE LIABLE TO ANY + * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES + * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF + * THE AUSTRALIAN NATIONAL UNIVERSITY HAVE BEEN ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * THE AUSTRALIAN NATIONAL UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES, + * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY + * AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS + * ON AN "AS IS" BASIS, AND THE AUSTRALIAN NATIONAL UNIVERSITY HAS NO + * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, + * OR MODIFICATIONS. + * + * Copyright (c) 1989 Carnegie Mellon University. + * All rights reserved. + * + * Redistribution and use in source and binary forms are permitted + * provided that the above copyright notice and this paragraph are + * duplicated in all such forms and that any documentation, + * advertising materials, and other materials related to such + * distribution and use acknowledge that the software was developed + * by Carnegie Mellon University. The name of the + * University may not be used to endorse or promote products derived + * from this software without specific prior written permission. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. + */ + +/* + * Supported network protocols. These values are used for + * indexing sc_npmode. + */ + +#define NP_IP 0 /* Internet Protocol */ +#define NUM_NP 1 /* Number of NPs. */ + +/* + * Buffers for the PPP process have the following structure + */ + +#define RBUFSIZE 2048 /* MUST be a power of 2 and be <= 4095 */ +struct ppp_buffer { + int size; /* Size of the buffer area */ + int count; /* Count of characters in bufr */ + int head; /* index to head of list */ + int tail; /* index to tail of list */ + int locked; /* Buffer is being sent */ + int type; /* Type of the buffer */ + /* =0, device read buffer */ + /* =1, device write buffer */ + /* =2, daemon write buffer */ + /* =3, daemon read buffer */ + unsigned short fcs; /* Frame Check Sequence (CRC) */ +}; + +/* Given a pointer to the ppp_buffer then return base address of buffer */ +#define buf_base(buf) ((u_char *) (&buf[1])) + +/* + * Structure describing each ppp unit. + */ + +struct ppp { + int magic; /* magic value for structure */ + + /* Bitmapped flag fields. */ + char inuse; /* are we allocated? */ + char escape; /* 0x20 if prev char was PPP_ESC*/ + char toss; /* toss this frame */ + + unsigned int flags; /* miscellany */ + + ext_accm xmit_async_map; /* 1 bit means that given control + character is quoted on output*/ + + unsigned long 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 */ + + /* Information about the current tty data */ + int line; /* PPP channel number */ + struct tty_struct *tty; /* ptr to TTY structure */ + int bytes_sent; /* Bytes sent on frame */ + int bytes_rcvd; /* Bytes recvd on frame */ + + /* Interface to the network layer */ + struct device *dev; /* easy for intr handling */ + + /* VJ Header compression data */ + struct slcompress *slcomp;/* for header compression */ + + /* Transmission information */ + struct ppp_buffer *xbuf; /* Buffer currently being sent */ + struct ppp_buffer *s1buf; /* Pointer to daemon buffer */ + struct ppp_buffer *s2buf; /* Pointer to device buffer */ + + 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. */ + + struct ppp_buffer *wbuf; /* Transmission information */ + struct ppp_buffer *tbuf; /* daemon transmission buffer */ + struct ppp_buffer *rbuf; /* Receive information */ + struct ppp_buffer *ubuf; /* User buffer information */ + struct ppp_buffer *cbuf; /* compression buffer */ + + /* Queues for select() functionality */ + struct wait_queue *write_wait; /* queue for reading processes */ + struct wait_queue *read_wait; /* queue for writing processes */ + + /* Statistic information */ + struct pppstat p; /* statistic information */ + struct ppp_ddinfo ddinfo; /* demand dial information */ + + /* PPP compression protocol information */ + u_int sc_bytessent; /* count of octets sent */ + u_int sc_bytesrcvd; /* count of octets received */ + enum NPmode sc_npmode[NUM_NP]; /* what to do with each NP */ + struct compressor *sc_xcomp; /* transmit compressor */ + void *sc_xc_state; /* transmit compressor state */ + struct compressor *sc_rcomp; /* receive decompressor */ + void *sc_rc_state; /* receive decompressor state */ +};