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Diffstat (limited to 'include/linux/if_pppvar.h')
| -rw-r--r-- | include/linux/if_pppvar.h | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/include/linux/if_pppvar.h b/include/linux/if_pppvar.h new file mode 100644 index 000000000..1c7eb4f6d --- /dev/null +++ b/include/linux/if_pppvar.h @@ -0,0 +1,157 @@ +/* $Id: if_pppvar.h,v 1.2 1995/06/12 11:36:51 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. + */ + +/* + * ==FILEVERSION 960302== + * + * NOTE TO MAINTAINERS: + * If you modify this file at all, please set the above date. + * if_pppvar.h is shipped with a PPP distribution as well as with the kernel; + * if everyone increases the FILEVERSION number above, then scripts + * can do the right thing when deciding whether to install a new if_pppvar.h + * file. Don't change the format of that line otherwise, so the + * installation script can recognize it. + */ + +/* + * 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 { + __s32 size; /* Size of the buffer area */ + __s32 count; /* Count of characters in bufr */ + __s32 head; /* index to head of list */ + __s32 tail; /* index to tail of list */ + __u32 locked; /* Buffer is being sent */ + __s32 type; /* Type of the buffer */ + /* =0, device read buffer */ + /* =1, device write buffer */ + /* =2, daemon write buffer */ + /* =3, daemon read buffer */ + __u16 fcs; /* Frame Check Sequence (CRC) */ + __u8 filler[4]; /* Extra space if needed */ +}; + +/* Given a pointer to the ppp_buffer then return base address of buffer */ +#define buf_base(buf) ((__u8 *) (&buf[1])) + +/* + * Structure describing each ppp unit. + */ + +struct ppp { + __s32 magic; /* magic value for structure */ + + /* Bitmapped flag fields. */ + __u8 inuse; /* are we allocated? */ + __u8 escape; /* 0x20 if prev char was PPP_ESC*/ + __u8 toss; /* toss this frame */ + + __u32 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*/ + __s32 mtu; /* maximum xmit frame size */ + __s32 mru; /* maximum receive frame size */ + + /* Information about the current tty data */ + __s32 line; /* PPP channel number */ + struct tty_struct *tty; /* ptr to TTY structure */ + __s32 bytes_sent; /* Bytes sent on frame */ + __s32 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 */ + + __u32 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 stats; /* statistic information */ + struct ppp_idle ddinfo; /* demand dial information */ + + /* PPP compression protocol information */ + __u32 sc_bytessent; /* count of octets sent */ + __u32 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 */ + __s32 sc_xfer; /* PID of reserved PPP table */ +}; |