--- /dev/null
+/* $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 */
+};
projects / ppp.git / blobdiff