[164] | 1 | /*****************************************************************************
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| 2 | * ppp.c - Network Point to Point Protocol program file.
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| 3 | *
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| 4 | * Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
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| 5 | * portions Copyright (c) 1997 by Global Election Systems Inc.
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| 6 | *
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| 7 | * The authors hereby grant permission to use, copy, modify, distribute,
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| 8 | * and license this software and its documentation for any purpose, provided
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| 9 | * that existing copyright notices are retained in all copies and that this
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| 10 | * notice and the following disclaimer are included verbatim in any
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| 11 | * distributions. No written agreement, license, or royalty fee is required
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| 12 | * for any of the authorized uses.
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| 13 | *
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| 14 | * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
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| 15 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 16 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 17 | * IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 18 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 19 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 20 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 21 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 22 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 23 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 24 | *
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| 25 | ******************************************************************************
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| 26 | * REVISION HISTORY
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| 27 | *
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| 28 | * 03-01-01 Marc Boucher <marc@mbsi.ca>
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| 29 | * Ported to lwIP.
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| 30 | * 97-11-05 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
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| 31 | * Original.
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| 32 | *****************************************************************************/
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| 33 |
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| 34 | /*
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| 35 | * ppp_defs.h - PPP definitions.
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| 36 | *
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| 37 | * if_pppvar.h - private structures and declarations for PPP.
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| 38 | *
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| 39 | * Copyright (c) 1994 The Australian National University.
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| 40 | * All rights reserved.
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| 41 | *
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| 42 | * Permission to use, copy, modify, and distribute this software and its
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| 43 | * documentation is hereby granted, provided that the above copyright
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| 44 | * notice appears in all copies. This software is provided without any
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| 45 | * warranty, express or implied. The Australian National University
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| 46 | * makes no representations about the suitability of this software for
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| 47 | * any purpose.
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| 48 | *
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| 49 | * IN NO EVENT SHALL THE AUSTRALIAN NATIONAL UNIVERSITY BE LIABLE TO ANY
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| 50 | * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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| 51 | * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
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| 52 | * THE AUSTRALIAN NATIONAL UNIVERSITY HAVE BEEN ADVISED OF THE POSSIBILITY
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| 53 | * OF SUCH DAMAGE.
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| 54 | *
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| 55 | * THE AUSTRALIAN NATIONAL UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES,
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| 56 | * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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| 57 | * AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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| 58 | * ON AN "AS IS" BASIS, AND THE AUSTRALIAN NATIONAL UNIVERSITY HAS NO
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| 59 | * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS,
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| 60 | * OR MODIFICATIONS.
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| 61 | */
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| 62 |
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| 63 | /*
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| 64 | * if_ppp.h - Point-to-Point Protocol definitions.
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| 65 | *
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| 66 | * Copyright (c) 1989 Carnegie Mellon University.
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| 67 | * All rights reserved.
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| 68 | *
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| 69 | * Redistribution and use in source and binary forms are permitted
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| 70 | * provided that the above copyright notice and this paragraph are
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| 71 | * duplicated in all such forms and that any documentation,
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| 72 | * advertising materials, and other materials related to such
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| 73 | * distribution and use acknowledge that the software was developed
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| 74 | * by Carnegie Mellon University. The name of the
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| 75 | * University may not be used to endorse or promote products derived
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| 76 | * from this software without specific prior written permission.
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| 77 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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| 78 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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| 79 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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| 80 | */
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| 81 |
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| 82 | #include "lwip/opt.h"
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| 83 |
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| 84 | #if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
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| 85 |
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| 86 | #include "ppp_impl.h"
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| 87 | #include "lwip/ip.h" /* for ip_input() */
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| 88 |
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| 89 | #include "pppdebug.h"
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| 90 |
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| 91 | #include "randm.h"
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| 92 | #include "fsm.h"
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| 93 | #if PAP_SUPPORT
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| 94 | #include "pap.h"
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| 95 | #endif /* PAP_SUPPORT */
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| 96 | #if CHAP_SUPPORT
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| 97 | #include "chap.h"
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| 98 | #endif /* CHAP_SUPPORT */
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| 99 | #include "ipcp.h"
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| 100 | #include "lcp.h"
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| 101 | #include "magic.h"
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| 102 | #include "auth.h"
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| 103 | #if VJ_SUPPORT
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| 104 | #include "vj.h"
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| 105 | #endif /* VJ_SUPPORT */
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| 106 | #if PPPOE_SUPPORT
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| 107 | #include "netif/ppp_oe.h"
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| 108 | #endif /* PPPOE_SUPPORT */
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| 109 |
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| 110 | #include "lwip/tcpip.h"
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| 111 | #include "lwip/api.h"
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| 112 | #include "lwip/snmp.h"
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| 113 |
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| 114 | #include <string.h>
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| 115 |
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| 116 | /*************************/
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| 117 | /*** LOCAL DEFINITIONS ***/
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| 118 | /*************************/
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| 119 |
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| 120 | /** PPP_INPROC_MULTITHREADED==1 call pppInput using tcpip_callback().
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| 121 | * Set this to 0 if pppInProc is called inside tcpip_thread or with NO_SYS==1.
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| 122 | * Default is 1 for NO_SYS==0 (multithreaded) and 0 for NO_SYS==1 (single-threaded).
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| 123 | */
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| 124 | #ifndef PPP_INPROC_MULTITHREADED
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| 125 | #define PPP_INPROC_MULTITHREADED (NO_SYS==0)
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| 126 | #endif
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| 127 |
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| 128 | /** PPP_INPROC_OWNTHREAD==1: start a dedicated RX thread per PPP session.
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| 129 | * Default is 0: call pppos_input() for received raw characters, charcater
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| 130 | * reception is up to the port */
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| 131 | #ifndef PPP_INPROC_OWNTHREAD
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| 132 | #define PPP_INPROC_OWNTHREAD PPP_INPROC_MULTITHREADED
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| 133 | #endif
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| 134 |
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| 135 | #if PPP_INPROC_OWNTHREAD && !PPP_INPROC_MULTITHREADED
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| 136 | #error "PPP_INPROC_OWNTHREAD needs PPP_INPROC_MULTITHREADED==1"
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| 137 | #endif
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| 138 |
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| 139 | /*
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| 140 | * The basic PPP frame.
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| 141 | */
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| 142 | #define PPP_ADDRESS(p) (((u_char *)(p))[0])
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| 143 | #define PPP_CONTROL(p) (((u_char *)(p))[1])
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| 144 | #define PPP_PROTOCOL(p) ((((u_char *)(p))[2] << 8) + ((u_char *)(p))[3])
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| 145 |
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| 146 | /* PPP packet parser states. Current state indicates operation yet to be
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| 147 | * completed. */
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| 148 | typedef enum {
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| 149 | PDIDLE = 0, /* Idle state - waiting. */
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| 150 | PDSTART, /* Process start flag. */
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| 151 | PDADDRESS, /* Process address field. */
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| 152 | PDCONTROL, /* Process control field. */
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| 153 | PDPROTOCOL1, /* Process protocol field 1. */
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| 154 | PDPROTOCOL2, /* Process protocol field 2. */
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| 155 | PDDATA /* Process data byte. */
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| 156 | } PPPDevStates;
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| 157 |
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| 158 | #define ESCAPE_P(accm, c) ((accm)[(c) >> 3] & pppACCMMask[c & 0x07])
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| 159 |
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| 160 | /************************/
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| 161 | /*** LOCAL DATA TYPES ***/
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| 162 | /************************/
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| 163 |
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| 164 | /** RX buffer size: this may be configured smaller! */
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| 165 | #ifndef PPPOS_RX_BUFSIZE
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| 166 | #define PPPOS_RX_BUFSIZE (PPP_MRU + PPP_HDRLEN)
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| 167 | #endif
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| 168 |
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| 169 | typedef struct PPPControlRx_s {
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| 170 | /** unit number / ppp descriptor */
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| 171 | int pd;
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| 172 | /** the rx file descriptor */
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| 173 | sio_fd_t fd;
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| 174 | /** receive buffer - encoded data is stored here */
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| 175 | #if PPP_INPROC_OWNTHREAD
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| 176 | u_char rxbuf[PPPOS_RX_BUFSIZE];
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| 177 | #endif /* PPP_INPROC_OWNTHREAD */
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| 178 |
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| 179 | /* The input packet. */
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| 180 | struct pbuf *inHead, *inTail;
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| 181 |
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| 182 | #if PPPOS_SUPPORT
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| 183 | u16_t inProtocol; /* The input protocol code. */
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| 184 | u16_t inFCS; /* Input Frame Check Sequence value. */
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| 185 | #endif /* PPPOS_SUPPORT */
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| 186 | PPPDevStates inState; /* The input process state. */
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| 187 | char inEscaped; /* Escape next character. */
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| 188 | ext_accm inACCM; /* Async-Ctl-Char-Map for input. */
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| 189 | } PPPControlRx;
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| 190 |
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| 191 | /*
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| 192 | * PPP interface control block.
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| 193 | */
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| 194 | typedef struct PPPControl_s {
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| 195 | PPPControlRx rx;
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| 196 | char openFlag; /* True when in use. */
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| 197 | #if PPPOE_SUPPORT
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| 198 | struct netif *ethif;
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| 199 | struct pppoe_softc *pppoe_sc;
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| 200 | #endif /* PPPOE_SUPPORT */
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| 201 | int if_up; /* True when the interface is up. */
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| 202 | int errCode; /* Code indicating why interface is down. */
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| 203 | #if PPPOS_SUPPORT
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| 204 | sio_fd_t fd; /* File device ID of port. */
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| 205 | #endif /* PPPOS_SUPPORT */
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| 206 | u16_t mtu; /* Peer's mru */
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| 207 | int pcomp; /* Does peer accept protocol compression? */
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| 208 | int accomp; /* Does peer accept addr/ctl compression? */
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| 209 | u_long lastXMit; /* Time of last transmission. */
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| 210 | ext_accm outACCM; /* Async-Ctl-Char-Map for output. */
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| 211 | #if PPPOS_SUPPORT && VJ_SUPPORT
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| 212 | int vjEnabled; /* Flag indicating VJ compression enabled. */
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| 213 | struct vjcompress vjComp; /* Van Jacobson compression header. */
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| 214 | #endif /* PPPOS_SUPPORT && VJ_SUPPORT */
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| 215 |
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| 216 | struct netif netif;
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| 217 |
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| 218 | struct ppp_addrs addrs;
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| 219 |
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| 220 | void (*linkStatusCB)(void *ctx, int errCode, void *arg);
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| 221 | void *linkStatusCtx;
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| 222 |
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| 223 | } PPPControl;
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| 224 |
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| 225 |
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| 226 | /*
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| 227 | * Ioctl definitions.
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| 228 | */
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| 229 |
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| 230 | struct npioctl {
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| 231 | int protocol; /* PPP procotol, e.g. PPP_IP */
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| 232 | enum NPmode mode;
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| 233 | };
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| 234 |
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| 235 |
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| 236 |
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| 237 | /***********************************/
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| 238 | /*** LOCAL FUNCTION DECLARATIONS ***/
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| 239 | /***********************************/
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| 240 | #if PPPOS_SUPPORT
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| 241 | #if PPP_INPROC_OWNTHREAD
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| 242 | static void pppInputThread(void *arg);
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| 243 | #endif /* PPP_INPROC_OWNTHREAD */
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| 244 | static void pppDrop(PPPControlRx *pcrx);
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| 245 | static void pppInProc(PPPControlRx *pcrx, u_char *s, int l);
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| 246 | static void pppFreeCurrentInputPacket(PPPControlRx *pcrx);
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| 247 | #endif /* PPPOS_SUPPORT */
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| 248 |
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| 249 |
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| 250 | /******************************/
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| 251 | /*** PUBLIC DATA STRUCTURES ***/
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| 252 | /******************************/
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| 253 | u_long subnetMask;
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| 254 |
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| 255 | static PPPControl pppControl[NUM_PPP]; /* The PPP interface control blocks. */
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| 256 |
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| 257 | /*
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| 258 | * PPP Data Link Layer "protocol" table.
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| 259 | * One entry per supported protocol.
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| 260 | * The last entry must be NULL.
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| 261 | */
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| 262 | struct protent *ppp_protocols[] = {
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| 263 | &lcp_protent,
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| 264 | #if PAP_SUPPORT
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| 265 | &pap_protent,
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| 266 | #endif /* PAP_SUPPORT */
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| 267 | #if CHAP_SUPPORT
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| 268 | &chap_protent,
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| 269 | #endif /* CHAP_SUPPORT */
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| 270 | #if CBCP_SUPPORT
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| 271 | &cbcp_protent,
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| 272 | #endif /* CBCP_SUPPORT */
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| 273 | &ipcp_protent,
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| 274 | #if CCP_SUPPORT
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| 275 | &ccp_protent,
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| 276 | #endif /* CCP_SUPPORT */
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| 277 | NULL
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| 278 | };
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| 279 |
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| 280 |
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| 281 | /*
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| 282 | * Buffers for outgoing packets. This must be accessed only from the appropriate
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| 283 | * PPP task so that it doesn't need to be protected to avoid collisions.
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| 284 | */
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| 285 | u_char outpacket_buf[NUM_PPP][PPP_MRU+PPP_HDRLEN];
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| 286 |
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| 287 |
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| 288 | /*****************************/
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| 289 | /*** LOCAL DATA STRUCTURES ***/
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| 290 | /*****************************/
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| 291 |
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| 292 | #if PPPOS_SUPPORT
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| 293 | /*
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| 294 | * FCS lookup table as calculated by genfcstab.
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| 295 | * @todo: smaller, slower implementation for lower memory footprint?
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| 296 | */
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| 297 | static const u_short fcstab[256] = {
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| 298 | 0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf,
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| 299 | 0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7,
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| 300 | 0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e,
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| 301 | 0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876,
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| 302 | 0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd,
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| 303 | 0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5,
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| 304 | 0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c,
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| 305 | 0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974,
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| 306 | 0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb,
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| 307 | 0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3,
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| 308 | 0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a,
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| 309 | 0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72,
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| 310 | 0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9,
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| 311 | 0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1,
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| 312 | 0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738,
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| 313 | 0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70,
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| 314 | 0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7,
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| 315 | 0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff,
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| 316 | 0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036,
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| 317 | 0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e,
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| 318 | 0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5,
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| 319 | 0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd,
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| 320 | 0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134,
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| 321 | 0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c,
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| 322 | 0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3,
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| 323 | 0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb,
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| 324 | 0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232,
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| 325 | 0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a,
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| 326 | 0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1,
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| 327 | 0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9,
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| 328 | 0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330,
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| 329 | 0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78
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| 330 | };
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| 331 |
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| 332 | /* PPP's Asynchronous-Control-Character-Map. The mask array is used
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| 333 | * to select the specific bit for a character. */
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| 334 | static u_char pppACCMMask[] = {
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| 335 | 0x01,
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| 336 | 0x02,
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| 337 | 0x04,
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| 338 | 0x08,
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| 339 | 0x10,
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| 340 | 0x20,
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| 341 | 0x40,
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| 342 | 0x80
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| 343 | };
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| 344 |
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| 345 | #if PPP_INPROC_OWNTHREAD
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| 346 | /** Wake up the task blocked in reading from serial line (if any) */
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| 347 | static void
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| 348 | pppRecvWakeup(int pd)
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| 349 | {
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| 350 | PPPDEBUG(LOG_DEBUG, ("pppRecvWakeup: unit %d\n", pd));
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| 351 | if (pppControl[pd].openFlag != 0) {
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| 352 | sio_read_abort(pppControl[pd].fd);
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| 353 | }
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| 354 | }
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| 355 | #endif /* PPP_INPROC_OWNTHREAD */
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| 356 | #endif /* PPPOS_SUPPORT */
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| 357 |
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| 358 | void
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| 359 | pppLinkTerminated(int pd)
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| 360 | {
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| 361 | PPPDEBUG(LOG_DEBUG, ("pppLinkTerminated: unit %d\n", pd));
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| 362 |
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| 363 | #if PPPOE_SUPPORT
|
---|
| 364 | if (pppControl[pd].ethif) {
|
---|
| 365 | pppoe_disconnect(pppControl[pd].pppoe_sc);
|
---|
| 366 | } else
|
---|
| 367 | #endif /* PPPOE_SUPPORT */
|
---|
| 368 | {
|
---|
| 369 | #if PPPOS_SUPPORT
|
---|
| 370 | PPPControl* pc;
|
---|
| 371 | #if PPP_INPROC_OWNTHREAD
|
---|
| 372 | pppRecvWakeup(pd);
|
---|
| 373 | #endif /* PPP_INPROC_OWNTHREAD */
|
---|
| 374 | pc = &pppControl[pd];
|
---|
| 375 |
|
---|
| 376 | PPPDEBUG(LOG_DEBUG, ("pppLinkTerminated: unit %d: linkStatusCB=%p errCode=%d\n", pd, pc->linkStatusCB, pc->errCode));
|
---|
| 377 | if (pc->linkStatusCB) {
|
---|
| 378 | pc->linkStatusCB(pc->linkStatusCtx, pc->errCode ? pc->errCode : PPPERR_PROTOCOL, NULL);
|
---|
| 379 | }
|
---|
| 380 |
|
---|
| 381 | pc->openFlag = 0;/**/
|
---|
| 382 | #endif /* PPPOS_SUPPORT */
|
---|
| 383 | }
|
---|
| 384 | PPPDEBUG(LOG_DEBUG, ("pppLinkTerminated: finished.\n"));
|
---|
| 385 | }
|
---|
| 386 |
|
---|
| 387 | void
|
---|
| 388 | pppLinkDown(int pd)
|
---|
| 389 | {
|
---|
| 390 | PPPDEBUG(LOG_DEBUG, ("pppLinkDown: unit %d\n", pd));
|
---|
| 391 |
|
---|
| 392 | #if PPPOE_SUPPORT
|
---|
| 393 | if (pppControl[pd].ethif) {
|
---|
| 394 | pppoe_disconnect(pppControl[pd].pppoe_sc);
|
---|
| 395 | } else
|
---|
| 396 | #endif /* PPPOE_SUPPORT */
|
---|
| 397 | {
|
---|
| 398 | #if PPPOS_SUPPORT && PPP_INPROC_OWNTHREAD
|
---|
| 399 | pppRecvWakeup(pd);
|
---|
| 400 | #endif /* PPPOS_SUPPORT && PPP_INPROC_OWNTHREAD*/
|
---|
| 401 | }
|
---|
| 402 | }
|
---|
| 403 |
|
---|
| 404 | /** Initiate LCP open request */
|
---|
| 405 | static void
|
---|
| 406 | pppStart(int pd)
|
---|
| 407 | {
|
---|
| 408 | PPPDEBUG(LOG_DEBUG, ("pppStart: unit %d\n", pd));
|
---|
| 409 | lcp_lowerup(pd);
|
---|
| 410 | lcp_open(pd); /* Start protocol */
|
---|
| 411 | PPPDEBUG(LOG_DEBUG, ("pppStart: finished\n"));
|
---|
| 412 | }
|
---|
| 413 |
|
---|
| 414 | /** LCP close request */
|
---|
| 415 | static void
|
---|
| 416 | pppStop(int pd)
|
---|
| 417 | {
|
---|
| 418 | PPPDEBUG(LOG_DEBUG, ("pppStop: unit %d\n", pd));
|
---|
| 419 | lcp_close(pd, "User request");
|
---|
| 420 | }
|
---|
| 421 |
|
---|
| 422 | /** Called when carrier/link is lost */
|
---|
| 423 | static void
|
---|
| 424 | pppHup(int pd)
|
---|
| 425 | {
|
---|
| 426 | PPPDEBUG(LOG_DEBUG, ("pppHupCB: unit %d\n", pd));
|
---|
| 427 | lcp_lowerdown(pd);
|
---|
| 428 | link_terminated(pd);
|
---|
| 429 | }
|
---|
| 430 |
|
---|
| 431 | /***********************************/
|
---|
| 432 | /*** PUBLIC FUNCTION DEFINITIONS ***/
|
---|
| 433 | /***********************************/
|
---|
| 434 | /* Initialize the PPP subsystem. */
|
---|
| 435 |
|
---|
| 436 | struct ppp_settings ppp_settings;
|
---|
| 437 |
|
---|
| 438 | void
|
---|
| 439 | pppInit(void)
|
---|
| 440 | {
|
---|
| 441 | struct protent *protp;
|
---|
| 442 | int i, j;
|
---|
| 443 |
|
---|
| 444 | memset(&ppp_settings, 0, sizeof(ppp_settings));
|
---|
| 445 | ppp_settings.usepeerdns = 1;
|
---|
| 446 | pppSetAuth(PPPAUTHTYPE_NONE, NULL, NULL);
|
---|
| 447 |
|
---|
| 448 | magicInit();
|
---|
| 449 |
|
---|
| 450 | subnetMask = PP_HTONL(0xffffff00UL);
|
---|
| 451 |
|
---|
| 452 | for (i = 0; i < NUM_PPP; i++) {
|
---|
| 453 | /* Initialize each protocol to the standard option set. */
|
---|
| 454 | for (j = 0; (protp = ppp_protocols[j]) != NULL; ++j) {
|
---|
| 455 | (*protp->init)(i);
|
---|
| 456 | }
|
---|
| 457 | }
|
---|
| 458 | }
|
---|
| 459 |
|
---|
| 460 | void
|
---|
| 461 | pppSetAuth(enum pppAuthType authType, const char *user, const char *passwd)
|
---|
| 462 | {
|
---|
| 463 | switch(authType) {
|
---|
| 464 | case PPPAUTHTYPE_NONE:
|
---|
| 465 | default:
|
---|
| 466 | #ifdef LWIP_PPP_STRICT_PAP_REJECT
|
---|
| 467 | ppp_settings.refuse_pap = 1;
|
---|
| 468 | #else /* LWIP_PPP_STRICT_PAP_REJECT */
|
---|
| 469 | /* some providers request pap and accept an empty login/pw */
|
---|
| 470 | ppp_settings.refuse_pap = 0;
|
---|
| 471 | #endif /* LWIP_PPP_STRICT_PAP_REJECT */
|
---|
| 472 | ppp_settings.refuse_chap = 1;
|
---|
| 473 | break;
|
---|
| 474 |
|
---|
| 475 | case PPPAUTHTYPE_ANY:
|
---|
| 476 | /* Warning: Using PPPAUTHTYPE_ANY might have security consequences.
|
---|
| 477 | * RFC 1994 says:
|
---|
| 478 | *
|
---|
| 479 | * In practice, within or associated with each PPP server, there is a
|
---|
| 480 | * database which associates "user" names with authentication
|
---|
| 481 | * information ("secrets"). It is not anticipated that a particular
|
---|
| 482 | * named user would be authenticated by multiple methods. This would
|
---|
| 483 | * make the user vulnerable to attacks which negotiate the least secure
|
---|
| 484 | * method from among a set (such as PAP rather than CHAP). If the same
|
---|
| 485 | * secret was used, PAP would reveal the secret to be used later with
|
---|
| 486 | * CHAP.
|
---|
| 487 | *
|
---|
| 488 | * Instead, for each user name there should be an indication of exactly
|
---|
| 489 | * one method used to authenticate that user name. If a user needs to
|
---|
| 490 | * make use of different authentication methods under different
|
---|
| 491 | * circumstances, then distinct user names SHOULD be employed, each of
|
---|
| 492 | * which identifies exactly one authentication method.
|
---|
| 493 | *
|
---|
| 494 | */
|
---|
| 495 | ppp_settings.refuse_pap = 0;
|
---|
| 496 | ppp_settings.refuse_chap = 0;
|
---|
| 497 | break;
|
---|
| 498 |
|
---|
| 499 | case PPPAUTHTYPE_PAP:
|
---|
| 500 | ppp_settings.refuse_pap = 0;
|
---|
| 501 | ppp_settings.refuse_chap = 1;
|
---|
| 502 | break;
|
---|
| 503 |
|
---|
| 504 | case PPPAUTHTYPE_CHAP:
|
---|
| 505 | ppp_settings.refuse_pap = 1;
|
---|
| 506 | ppp_settings.refuse_chap = 0;
|
---|
| 507 | break;
|
---|
| 508 | }
|
---|
| 509 |
|
---|
| 510 | if(user) {
|
---|
| 511 | strncpy(ppp_settings.user, user, sizeof(ppp_settings.user)-1);
|
---|
| 512 | ppp_settings.user[sizeof(ppp_settings.user)-1] = '\0';
|
---|
| 513 | } else {
|
---|
| 514 | ppp_settings.user[0] = '\0';
|
---|
| 515 | }
|
---|
| 516 |
|
---|
| 517 | if(passwd) {
|
---|
| 518 | strncpy(ppp_settings.passwd, passwd, sizeof(ppp_settings.passwd)-1);
|
---|
| 519 | ppp_settings.passwd[sizeof(ppp_settings.passwd)-1] = '\0';
|
---|
| 520 | } else {
|
---|
| 521 | ppp_settings.passwd[0] = '\0';
|
---|
| 522 | }
|
---|
| 523 | }
|
---|
| 524 |
|
---|
| 525 | #if PPPOS_SUPPORT
|
---|
| 526 | /** Open a new PPP connection using the given I/O device.
|
---|
| 527 | * This initializes the PPP control block but does not
|
---|
| 528 | * attempt to negotiate the LCP session. If this port
|
---|
| 529 | * connects to a modem, the modem connection must be
|
---|
| 530 | * established before calling this.
|
---|
| 531 | * Return a new PPP connection descriptor on success or
|
---|
| 532 | * an error code (negative) on failure.
|
---|
| 533 | *
|
---|
| 534 | * pppOpen() is directly defined to this function.
|
---|
| 535 | */
|
---|
| 536 | int
|
---|
| 537 | pppOverSerialOpen(sio_fd_t fd, pppLinkStatusCB_fn linkStatusCB, void *linkStatusCtx)
|
---|
| 538 | {
|
---|
| 539 | PPPControl *pc;
|
---|
| 540 | int pd;
|
---|
| 541 |
|
---|
| 542 | if (linkStatusCB == NULL) {
|
---|
| 543 | /* PPP is single-threaded: without a callback,
|
---|
| 544 | * there is no way to know when the link is up. */
|
---|
| 545 | return PPPERR_PARAM;
|
---|
| 546 | }
|
---|
| 547 |
|
---|
| 548 | /* Find a free PPP session descriptor. */
|
---|
| 549 | for (pd = 0; pd < NUM_PPP && pppControl[pd].openFlag != 0; pd++);
|
---|
| 550 |
|
---|
| 551 | if (pd >= NUM_PPP) {
|
---|
| 552 | pd = PPPERR_OPEN;
|
---|
| 553 | } else {
|
---|
| 554 | pc = &pppControl[pd];
|
---|
| 555 | /* input pbuf left over from last session? */
|
---|
| 556 | pppFreeCurrentInputPacket(&pc->rx);
|
---|
| 557 | /* @todo: is this correct or do I overwrite something? */
|
---|
| 558 | memset(pc, 0, sizeof(PPPControl));
|
---|
| 559 | pc->rx.pd = pd;
|
---|
| 560 | pc->rx.fd = fd;
|
---|
| 561 |
|
---|
| 562 | pc->openFlag = 1;
|
---|
| 563 | pc->fd = fd;
|
---|
| 564 |
|
---|
| 565 | #if VJ_SUPPORT
|
---|
| 566 | vj_compress_init(&pc->vjComp);
|
---|
| 567 | #endif /* VJ_SUPPORT */
|
---|
| 568 |
|
---|
| 569 | /*
|
---|
| 570 | * Default the in and out accm so that escape and flag characters
|
---|
| 571 | * are always escaped.
|
---|
| 572 | */
|
---|
| 573 | pc->rx.inACCM[15] = 0x60; /* no need to protect since RX is not running */
|
---|
| 574 | pc->outACCM[15] = 0x60;
|
---|
| 575 |
|
---|
| 576 | pc->linkStatusCB = linkStatusCB;
|
---|
| 577 | pc->linkStatusCtx = linkStatusCtx;
|
---|
| 578 |
|
---|
| 579 | /*
|
---|
| 580 | * Start the connection and handle incoming events (packet or timeout).
|
---|
| 581 | */
|
---|
| 582 | PPPDEBUG(LOG_INFO, ("pppOverSerialOpen: unit %d: Connecting\n", pd));
|
---|
| 583 | pppStart(pd);
|
---|
| 584 | #if PPP_INPROC_OWNTHREAD
|
---|
| 585 | sys_thread_new(PPP_THREAD_NAME, pppInputThread, (void*)&pc->rx, PPP_THREAD_STACKSIZE, PPP_THREAD_PRIO);
|
---|
| 586 | #endif /* PPP_INPROC_OWNTHREAD */
|
---|
| 587 | }
|
---|
| 588 |
|
---|
| 589 | return pd;
|
---|
| 590 | }
|
---|
| 591 | #endif /* PPPOS_SUPPORT */
|
---|
| 592 |
|
---|
| 593 | #if PPPOE_SUPPORT
|
---|
| 594 | static void pppOverEthernetLinkStatusCB(int pd, int up);
|
---|
| 595 |
|
---|
| 596 | void
|
---|
| 597 | pppOverEthernetClose(int pd)
|
---|
| 598 | {
|
---|
| 599 | PPPControl* pc = &pppControl[pd];
|
---|
| 600 |
|
---|
| 601 | /* *TJL* There's no lcp_deinit */
|
---|
| 602 | lcp_close(pd, NULL);
|
---|
| 603 |
|
---|
| 604 | pppoe_destroy(&pc->netif);
|
---|
| 605 | }
|
---|
| 606 |
|
---|
| 607 | int pppOverEthernetOpen(struct netif *ethif, const char *service_name, const char *concentrator_name,
|
---|
| 608 | pppLinkStatusCB_fn linkStatusCB, void *linkStatusCtx)
|
---|
| 609 | {
|
---|
| 610 | PPPControl *pc;
|
---|
| 611 | int pd;
|
---|
| 612 |
|
---|
| 613 | LWIP_UNUSED_ARG(service_name);
|
---|
| 614 | LWIP_UNUSED_ARG(concentrator_name);
|
---|
| 615 |
|
---|
| 616 | if (linkStatusCB == NULL) {
|
---|
| 617 | /* PPP is single-threaded: without a callback,
|
---|
| 618 | * there is no way to know when the link is up. */
|
---|
| 619 | return PPPERR_PARAM;
|
---|
| 620 | }
|
---|
| 621 |
|
---|
| 622 | /* Find a free PPP session descriptor. Critical region? */
|
---|
| 623 | for (pd = 0; pd < NUM_PPP && pppControl[pd].openFlag != 0; pd++);
|
---|
| 624 | if (pd >= NUM_PPP) {
|
---|
| 625 | pd = PPPERR_OPEN;
|
---|
| 626 | } else {
|
---|
| 627 | pc = &pppControl[pd];
|
---|
| 628 | memset(pc, 0, sizeof(PPPControl));
|
---|
| 629 | pc->openFlag = 1;
|
---|
| 630 | pc->ethif = ethif;
|
---|
| 631 |
|
---|
| 632 | pc->linkStatusCB = linkStatusCB;
|
---|
| 633 | pc->linkStatusCtx = linkStatusCtx;
|
---|
| 634 |
|
---|
| 635 | lcp_wantoptions[pd].mru = PPPOE_MAXMTU;
|
---|
| 636 | lcp_wantoptions[pd].neg_asyncmap = 0;
|
---|
| 637 | lcp_wantoptions[pd].neg_pcompression = 0;
|
---|
| 638 | lcp_wantoptions[pd].neg_accompression = 0;
|
---|
| 639 |
|
---|
| 640 | lcp_allowoptions[pd].mru = PPPOE_MAXMTU;
|
---|
| 641 | lcp_allowoptions[pd].neg_asyncmap = 0;
|
---|
| 642 | lcp_allowoptions[pd].neg_pcompression = 0;
|
---|
| 643 | lcp_allowoptions[pd].neg_accompression = 0;
|
---|
| 644 |
|
---|
| 645 | if(pppoe_create(ethif, pd, pppOverEthernetLinkStatusCB, &pc->pppoe_sc) != ERR_OK) {
|
---|
| 646 | pc->openFlag = 0;
|
---|
| 647 | return PPPERR_OPEN;
|
---|
| 648 | }
|
---|
| 649 |
|
---|
| 650 | pppoe_connect(pc->pppoe_sc);
|
---|
| 651 | }
|
---|
| 652 |
|
---|
| 653 | return pd;
|
---|
| 654 | }
|
---|
| 655 | #endif /* PPPOE_SUPPORT */
|
---|
| 656 |
|
---|
| 657 |
|
---|
| 658 | /* Close a PPP connection and release the descriptor.
|
---|
| 659 | * Any outstanding packets in the queues are dropped.
|
---|
| 660 | * Return 0 on success, an error code on failure. */
|
---|
| 661 | int
|
---|
| 662 | pppClose(int pd)
|
---|
| 663 | {
|
---|
| 664 | PPPControl *pc = &pppControl[pd];
|
---|
| 665 | int st = 0;
|
---|
| 666 |
|
---|
| 667 | PPPDEBUG(LOG_DEBUG, ("pppClose() called\n"));
|
---|
| 668 |
|
---|
| 669 | /* Disconnect */
|
---|
| 670 | #if PPPOE_SUPPORT
|
---|
| 671 | if(pc->ethif) {
|
---|
| 672 | PPPDEBUG(LOG_DEBUG, ("pppClose: unit %d kill_link -> pppStop\n", pd));
|
---|
| 673 | pc->errCode = PPPERR_USER;
|
---|
| 674 | /* This will leave us at PHASE_DEAD. */
|
---|
| 675 | pppStop(pd);
|
---|
| 676 | } else
|
---|
| 677 | #endif /* PPPOE_SUPPORT */
|
---|
| 678 | {
|
---|
| 679 | #if PPPOS_SUPPORT
|
---|
| 680 | PPPDEBUG(LOG_DEBUG, ("pppClose: unit %d kill_link -> pppStop\n", pd));
|
---|
| 681 | pc->errCode = PPPERR_USER;
|
---|
| 682 | /* This will leave us at PHASE_DEAD. */
|
---|
| 683 | pppStop(pd);
|
---|
| 684 | #if PPP_INPROC_OWNTHREAD
|
---|
| 685 | pppRecvWakeup(pd);
|
---|
| 686 | #endif /* PPP_INPROC_OWNTHREAD */
|
---|
| 687 | #endif /* PPPOS_SUPPORT */
|
---|
| 688 | }
|
---|
| 689 |
|
---|
| 690 | return st;
|
---|
| 691 | }
|
---|
| 692 |
|
---|
| 693 | /* This function is called when carrier is lost on the PPP channel. */
|
---|
| 694 | void
|
---|
| 695 | pppSigHUP(int pd)
|
---|
| 696 | {
|
---|
| 697 | PPPDEBUG(LOG_DEBUG, ("pppSigHUP: unit %d sig_hup -> pppHupCB\n", pd));
|
---|
| 698 | pppHup(pd);
|
---|
| 699 | }
|
---|
| 700 |
|
---|
| 701 | #if PPPOS_SUPPORT
|
---|
| 702 | static void
|
---|
| 703 | nPut(PPPControl *pc, struct pbuf *nb)
|
---|
| 704 | {
|
---|
| 705 | struct pbuf *b;
|
---|
| 706 | int c;
|
---|
| 707 |
|
---|
| 708 | for(b = nb; b != NULL; b = b->next) {
|
---|
| 709 | if((c = sio_write(pc->fd, b->payload, b->len)) != b->len) {
|
---|
| 710 | PPPDEBUG(LOG_WARNING,
|
---|
| 711 | ("PPP nPut: incomplete sio_write(fd:%"SZT_F", len:%d, c: 0x%"X8_F") c = %d\n", (size_t)pc->fd, b->len, c, c));
|
---|
| 712 | LINK_STATS_INC(link.err);
|
---|
| 713 | pc->lastXMit = 0; /* prepend PPP_FLAG to next packet */
|
---|
| 714 | snmp_inc_ifoutdiscards(&pc->netif);
|
---|
| 715 | pbuf_free(nb);
|
---|
| 716 | return;
|
---|
| 717 | }
|
---|
| 718 | }
|
---|
| 719 |
|
---|
| 720 | snmp_add_ifoutoctets(&pc->netif, nb->tot_len);
|
---|
| 721 | snmp_inc_ifoutucastpkts(&pc->netif);
|
---|
| 722 | pbuf_free(nb);
|
---|
| 723 | LINK_STATS_INC(link.xmit);
|
---|
| 724 | }
|
---|
| 725 |
|
---|
| 726 | /*
|
---|
| 727 | * pppAppend - append given character to end of given pbuf. If outACCM
|
---|
| 728 | * is not NULL and the character needs to be escaped, do so.
|
---|
| 729 | * If pbuf is full, append another.
|
---|
| 730 | * Return the current pbuf.
|
---|
| 731 | */
|
---|
| 732 | static struct pbuf *
|
---|
| 733 | pppAppend(u_char c, struct pbuf *nb, ext_accm *outACCM)
|
---|
| 734 | {
|
---|
| 735 | struct pbuf *tb = nb;
|
---|
| 736 |
|
---|
| 737 | /* Make sure there is room for the character and an escape code.
|
---|
| 738 | * Sure we don't quite fill the buffer if the character doesn't
|
---|
| 739 | * get escaped but is one character worth complicating this? */
|
---|
| 740 | /* Note: We assume no packet header. */
|
---|
| 741 | if (nb && (PBUF_POOL_BUFSIZE - nb->len) < 2) {
|
---|
| 742 | tb = pbuf_alloc(PBUF_RAW, 0, PBUF_POOL);
|
---|
| 743 | if (tb) {
|
---|
| 744 | nb->next = tb;
|
---|
| 745 | } else {
|
---|
| 746 | LINK_STATS_INC(link.memerr);
|
---|
| 747 | }
|
---|
| 748 | nb = tb;
|
---|
| 749 | }
|
---|
| 750 |
|
---|
| 751 | if (nb) {
|
---|
| 752 | if (outACCM && ESCAPE_P(*outACCM, c)) {
|
---|
| 753 | *((u_char*)nb->payload + nb->len++) = PPP_ESCAPE;
|
---|
| 754 | *((u_char*)nb->payload + nb->len++) = c ^ PPP_TRANS;
|
---|
| 755 | } else {
|
---|
| 756 | *((u_char*)nb->payload + nb->len++) = c;
|
---|
| 757 | }
|
---|
| 758 | }
|
---|
| 759 |
|
---|
| 760 | return tb;
|
---|
| 761 | }
|
---|
| 762 | #endif /* PPPOS_SUPPORT */
|
---|
| 763 |
|
---|
| 764 | #if PPPOE_SUPPORT
|
---|
| 765 | static err_t
|
---|
| 766 | pppifOutputOverEthernet(int pd, struct pbuf *p)
|
---|
| 767 | {
|
---|
| 768 | PPPControl *pc = &pppControl[pd];
|
---|
| 769 | struct pbuf *pb;
|
---|
| 770 | u_short protocol = PPP_IP;
|
---|
| 771 | int i=0;
|
---|
| 772 | u16_t tot_len;
|
---|
| 773 |
|
---|
| 774 | /* @todo: try to use pbuf_header() here! */
|
---|
| 775 | pb = pbuf_alloc(PBUF_LINK, PPPOE_HDRLEN + sizeof(protocol), PBUF_RAM);
|
---|
| 776 | if(!pb) {
|
---|
| 777 | LINK_STATS_INC(link.memerr);
|
---|
| 778 | LINK_STATS_INC(link.proterr);
|
---|
| 779 | snmp_inc_ifoutdiscards(&pc->netif);
|
---|
| 780 | return ERR_MEM;
|
---|
| 781 | }
|
---|
| 782 |
|
---|
| 783 | pbuf_header(pb, -(s16_t)PPPOE_HDRLEN);
|
---|
| 784 |
|
---|
| 785 | pc->lastXMit = sys_jiffies();
|
---|
| 786 |
|
---|
| 787 | if (!pc->pcomp || protocol > 0xFF) {
|
---|
| 788 | *((u_char*)pb->payload + i++) = (protocol >> 8) & 0xFF;
|
---|
| 789 | }
|
---|
| 790 | *((u_char*)pb->payload + i) = protocol & 0xFF;
|
---|
| 791 |
|
---|
| 792 | pbuf_chain(pb, p);
|
---|
| 793 | tot_len = pb->tot_len;
|
---|
| 794 |
|
---|
| 795 | if(pppoe_xmit(pc->pppoe_sc, pb) != ERR_OK) {
|
---|
| 796 | LINK_STATS_INC(link.err);
|
---|
| 797 | snmp_inc_ifoutdiscards(&pc->netif);
|
---|
| 798 | return PPPERR_DEVICE;
|
---|
| 799 | }
|
---|
| 800 |
|
---|
| 801 | snmp_add_ifoutoctets(&pc->netif, tot_len);
|
---|
| 802 | snmp_inc_ifoutucastpkts(&pc->netif);
|
---|
| 803 | LINK_STATS_INC(link.xmit);
|
---|
| 804 | return ERR_OK;
|
---|
| 805 | }
|
---|
| 806 | #endif /* PPPOE_SUPPORT */
|
---|
| 807 |
|
---|
| 808 | /* Send a packet on the given connection. */
|
---|
| 809 | static err_t
|
---|
| 810 | pppifOutput(struct netif *netif, struct pbuf *pb, ip_addr_t *ipaddr)
|
---|
| 811 | {
|
---|
| 812 | int pd = (int)(size_t)netif->state;
|
---|
| 813 | PPPControl *pc = &pppControl[pd];
|
---|
| 814 | #if PPPOS_SUPPORT
|
---|
| 815 | u_short protocol = PPP_IP;
|
---|
| 816 | u_int fcsOut = PPP_INITFCS;
|
---|
| 817 | struct pbuf *headMB = NULL, *tailMB = NULL, *p;
|
---|
| 818 | u_char c;
|
---|
| 819 | #endif /* PPPOS_SUPPORT */
|
---|
| 820 |
|
---|
| 821 | LWIP_UNUSED_ARG(ipaddr);
|
---|
| 822 |
|
---|
| 823 | /* Validate parameters. */
|
---|
| 824 | /* We let any protocol value go through - it can't hurt us
|
---|
| 825 | * and the peer will just drop it if it's not accepting it. */
|
---|
| 826 | if (pd < 0 || pd >= NUM_PPP || !pc->openFlag || !pb) {
|
---|
| 827 | PPPDEBUG(LOG_WARNING, ("pppifOutput[%d]: bad parms prot=%d pb=%p\n",
|
---|
| 828 | pd, PPP_IP, pb));
|
---|
| 829 | LINK_STATS_INC(link.opterr);
|
---|
| 830 | LINK_STATS_INC(link.drop);
|
---|
| 831 | snmp_inc_ifoutdiscards(netif);
|
---|
| 832 | return ERR_ARG;
|
---|
| 833 | }
|
---|
| 834 |
|
---|
| 835 | /* Check that the link is up. */
|
---|
| 836 | if (lcp_phase[pd] == PHASE_DEAD) {
|
---|
| 837 | PPPDEBUG(LOG_ERR, ("pppifOutput[%d]: link not up\n", pd));
|
---|
| 838 | LINK_STATS_INC(link.rterr);
|
---|
| 839 | LINK_STATS_INC(link.drop);
|
---|
| 840 | snmp_inc_ifoutdiscards(netif);
|
---|
| 841 | return ERR_RTE;
|
---|
| 842 | }
|
---|
| 843 |
|
---|
| 844 | #if PPPOE_SUPPORT
|
---|
| 845 | if(pc->ethif) {
|
---|
| 846 | return pppifOutputOverEthernet(pd, pb);
|
---|
| 847 | }
|
---|
| 848 | #endif /* PPPOE_SUPPORT */
|
---|
| 849 |
|
---|
| 850 | #if PPPOS_SUPPORT
|
---|
| 851 | /* Grab an output buffer. */
|
---|
| 852 | headMB = pbuf_alloc(PBUF_RAW, 0, PBUF_POOL);
|
---|
| 853 | if (headMB == NULL) {
|
---|
| 854 | PPPDEBUG(LOG_WARNING, ("pppifOutput[%d]: first alloc fail\n", pd));
|
---|
| 855 | LINK_STATS_INC(link.memerr);
|
---|
| 856 | LINK_STATS_INC(link.drop);
|
---|
| 857 | snmp_inc_ifoutdiscards(netif);
|
---|
| 858 | return ERR_MEM;
|
---|
| 859 | }
|
---|
| 860 |
|
---|
| 861 | #if VJ_SUPPORT
|
---|
| 862 | /*
|
---|
| 863 | * Attempt Van Jacobson header compression if VJ is configured and
|
---|
| 864 | * this is an IP packet.
|
---|
| 865 | */
|
---|
| 866 | if (protocol == PPP_IP && pc->vjEnabled) {
|
---|
| 867 | switch (vj_compress_tcp(&pc->vjComp, pb)) {
|
---|
| 868 | case TYPE_IP:
|
---|
| 869 | /* No change...
|
---|
| 870 | protocol = PPP_IP_PROTOCOL; */
|
---|
| 871 | break;
|
---|
| 872 | case TYPE_COMPRESSED_TCP:
|
---|
| 873 | protocol = PPP_VJC_COMP;
|
---|
| 874 | break;
|
---|
| 875 | case TYPE_UNCOMPRESSED_TCP:
|
---|
| 876 | protocol = PPP_VJC_UNCOMP;
|
---|
| 877 | break;
|
---|
| 878 | default:
|
---|
| 879 | PPPDEBUG(LOG_WARNING, ("pppifOutput[%d]: bad IP packet\n", pd));
|
---|
| 880 | LINK_STATS_INC(link.proterr);
|
---|
| 881 | LINK_STATS_INC(link.drop);
|
---|
| 882 | snmp_inc_ifoutdiscards(netif);
|
---|
| 883 | pbuf_free(headMB);
|
---|
| 884 | return ERR_VAL;
|
---|
| 885 | }
|
---|
| 886 | }
|
---|
| 887 | #endif /* VJ_SUPPORT */
|
---|
| 888 |
|
---|
| 889 | tailMB = headMB;
|
---|
| 890 |
|
---|
| 891 | /* Build the PPP header. */
|
---|
| 892 | if ((sys_jiffies() - pc->lastXMit) >= PPP_MAXIDLEFLAG) {
|
---|
| 893 | tailMB = pppAppend(PPP_FLAG, tailMB, NULL);
|
---|
| 894 | }
|
---|
| 895 |
|
---|
| 896 | pc->lastXMit = sys_jiffies();
|
---|
| 897 | if (!pc->accomp) {
|
---|
| 898 | fcsOut = PPP_FCS(fcsOut, PPP_ALLSTATIONS);
|
---|
| 899 | tailMB = pppAppend(PPP_ALLSTATIONS, tailMB, &pc->outACCM);
|
---|
| 900 | fcsOut = PPP_FCS(fcsOut, PPP_UI);
|
---|
| 901 | tailMB = pppAppend(PPP_UI, tailMB, &pc->outACCM);
|
---|
| 902 | }
|
---|
| 903 | if (!pc->pcomp || protocol > 0xFF) {
|
---|
| 904 | c = (protocol >> 8) & 0xFF;
|
---|
| 905 | fcsOut = PPP_FCS(fcsOut, c);
|
---|
| 906 | tailMB = pppAppend(c, tailMB, &pc->outACCM);
|
---|
| 907 | }
|
---|
| 908 | c = protocol & 0xFF;
|
---|
| 909 | fcsOut = PPP_FCS(fcsOut, c);
|
---|
| 910 | tailMB = pppAppend(c, tailMB, &pc->outACCM);
|
---|
| 911 |
|
---|
| 912 | /* Load packet. */
|
---|
| 913 | for(p = pb; p; p = p->next) {
|
---|
| 914 | int n;
|
---|
| 915 | u_char *sPtr;
|
---|
| 916 |
|
---|
| 917 | sPtr = (u_char*)p->payload;
|
---|
| 918 | n = p->len;
|
---|
| 919 | while (n-- > 0) {
|
---|
| 920 | c = *sPtr++;
|
---|
| 921 |
|
---|
| 922 | /* Update FCS before checking for special characters. */
|
---|
| 923 | fcsOut = PPP_FCS(fcsOut, c);
|
---|
| 924 |
|
---|
| 925 | /* Copy to output buffer escaping special characters. */
|
---|
| 926 | tailMB = pppAppend(c, tailMB, &pc->outACCM);
|
---|
| 927 | }
|
---|
| 928 | }
|
---|
| 929 |
|
---|
| 930 | /* Add FCS and trailing flag. */
|
---|
| 931 | c = ~fcsOut & 0xFF;
|
---|
| 932 | tailMB = pppAppend(c, tailMB, &pc->outACCM);
|
---|
| 933 | c = (~fcsOut >> 8) & 0xFF;
|
---|
| 934 | tailMB = pppAppend(c, tailMB, &pc->outACCM);
|
---|
| 935 | tailMB = pppAppend(PPP_FLAG, tailMB, NULL);
|
---|
| 936 |
|
---|
| 937 | /* If we failed to complete the packet, throw it away. */
|
---|
| 938 | if (!tailMB) {
|
---|
| 939 | PPPDEBUG(LOG_WARNING,
|
---|
| 940 | ("pppifOutput[%d]: Alloc err - dropping proto=%d\n",
|
---|
| 941 | pd, protocol));
|
---|
| 942 | pbuf_free(headMB);
|
---|
| 943 | LINK_STATS_INC(link.memerr);
|
---|
| 944 | LINK_STATS_INC(link.drop);
|
---|
| 945 | snmp_inc_ifoutdiscards(netif);
|
---|
| 946 | return ERR_MEM;
|
---|
| 947 | }
|
---|
| 948 |
|
---|
| 949 | /* Send it. */
|
---|
| 950 | PPPDEBUG(LOG_INFO, ("pppifOutput[%d]: proto=0x%"X16_F"\n", pd, protocol));
|
---|
| 951 |
|
---|
| 952 | nPut(pc, headMB);
|
---|
| 953 | #endif /* PPPOS_SUPPORT */
|
---|
| 954 |
|
---|
| 955 | return ERR_OK;
|
---|
| 956 | }
|
---|
| 957 |
|
---|
| 958 | /* Get and set parameters for the given connection.
|
---|
| 959 | * Return 0 on success, an error code on failure. */
|
---|
| 960 | int
|
---|
| 961 | pppIOCtl(int pd, int cmd, void *arg)
|
---|
| 962 | {
|
---|
| 963 | PPPControl *pc = &pppControl[pd];
|
---|
| 964 | int st = 0;
|
---|
| 965 |
|
---|
| 966 | if (pd < 0 || pd >= NUM_PPP) {
|
---|
| 967 | st = PPPERR_PARAM;
|
---|
| 968 | } else {
|
---|
| 969 | switch(cmd) {
|
---|
| 970 | case PPPCTLG_UPSTATUS: /* Get the PPP up status. */
|
---|
| 971 | if (arg) {
|
---|
| 972 | *(int *)arg = (int)(pc->if_up);
|
---|
| 973 | } else {
|
---|
| 974 | st = PPPERR_PARAM;
|
---|
| 975 | }
|
---|
| 976 | break;
|
---|
| 977 | case PPPCTLS_ERRCODE: /* Set the PPP error code. */
|
---|
| 978 | if (arg) {
|
---|
| 979 | pc->errCode = *(int *)arg;
|
---|
| 980 | } else {
|
---|
| 981 | st = PPPERR_PARAM;
|
---|
| 982 | }
|
---|
| 983 | break;
|
---|
| 984 | case PPPCTLG_ERRCODE: /* Get the PPP error code. */
|
---|
| 985 | if (arg) {
|
---|
| 986 | *(int *)arg = (int)(pc->errCode);
|
---|
| 987 | } else {
|
---|
| 988 | st = PPPERR_PARAM;
|
---|
| 989 | }
|
---|
| 990 | break;
|
---|
| 991 | #if PPPOS_SUPPORT
|
---|
| 992 | case PPPCTLG_FD: /* Get the fd associated with the ppp */
|
---|
| 993 | if (arg) {
|
---|
| 994 | *(sio_fd_t *)arg = pc->fd;
|
---|
| 995 | } else {
|
---|
| 996 | st = PPPERR_PARAM;
|
---|
| 997 | }
|
---|
| 998 | break;
|
---|
| 999 | #endif /* PPPOS_SUPPORT */
|
---|
| 1000 | default:
|
---|
| 1001 | st = PPPERR_PARAM;
|
---|
| 1002 | break;
|
---|
| 1003 | }
|
---|
| 1004 | }
|
---|
| 1005 |
|
---|
| 1006 | return st;
|
---|
| 1007 | }
|
---|
| 1008 |
|
---|
| 1009 | /*
|
---|
| 1010 | * Return the Maximum Transmission Unit for the given PPP connection.
|
---|
| 1011 | */
|
---|
| 1012 | u_short
|
---|
| 1013 | pppMTU(int pd)
|
---|
| 1014 | {
|
---|
| 1015 | PPPControl *pc = &pppControl[pd];
|
---|
| 1016 | u_short st;
|
---|
| 1017 |
|
---|
| 1018 | /* Validate parameters. */
|
---|
| 1019 | if (pd < 0 || pd >= NUM_PPP || !pc->openFlag) {
|
---|
| 1020 | st = 0;
|
---|
| 1021 | } else {
|
---|
| 1022 | st = pc->mtu;
|
---|
| 1023 | }
|
---|
| 1024 |
|
---|
| 1025 | return st;
|
---|
| 1026 | }
|
---|
| 1027 |
|
---|
| 1028 | #if PPPOE_SUPPORT
|
---|
| 1029 | int
|
---|
| 1030 | pppWriteOverEthernet(int pd, const u_char *s, int n)
|
---|
| 1031 | {
|
---|
| 1032 | PPPControl *pc = &pppControl[pd];
|
---|
| 1033 | struct pbuf *pb;
|
---|
| 1034 |
|
---|
| 1035 | /* skip address & flags */
|
---|
| 1036 | s += 2;
|
---|
| 1037 | n -= 2;
|
---|
| 1038 |
|
---|
| 1039 | LWIP_ASSERT("PPPOE_HDRLEN + n <= 0xffff", PPPOE_HDRLEN + n <= 0xffff);
|
---|
| 1040 | pb = pbuf_alloc(PBUF_LINK, (u16_t)(PPPOE_HDRLEN + n), PBUF_RAM);
|
---|
| 1041 | if(!pb) {
|
---|
| 1042 | LINK_STATS_INC(link.memerr);
|
---|
| 1043 | LINK_STATS_INC(link.proterr);
|
---|
| 1044 | snmp_inc_ifoutdiscards(&pc->netif);
|
---|
| 1045 | return PPPERR_ALLOC;
|
---|
| 1046 | }
|
---|
| 1047 |
|
---|
| 1048 | pbuf_header(pb, -(s16_t)PPPOE_HDRLEN);
|
---|
| 1049 |
|
---|
| 1050 | pc->lastXMit = sys_jiffies();
|
---|
| 1051 |
|
---|
| 1052 | MEMCPY(pb->payload, s, n);
|
---|
| 1053 |
|
---|
| 1054 | if(pppoe_xmit(pc->pppoe_sc, pb) != ERR_OK) {
|
---|
| 1055 | LINK_STATS_INC(link.err);
|
---|
| 1056 | snmp_inc_ifoutdiscards(&pc->netif);
|
---|
| 1057 | return PPPERR_DEVICE;
|
---|
| 1058 | }
|
---|
| 1059 |
|
---|
| 1060 | snmp_add_ifoutoctets(&pc->netif, (u16_t)n);
|
---|
| 1061 | snmp_inc_ifoutucastpkts(&pc->netif);
|
---|
| 1062 | LINK_STATS_INC(link.xmit);
|
---|
| 1063 | return PPPERR_NONE;
|
---|
| 1064 | }
|
---|
| 1065 | #endif /* PPPOE_SUPPORT */
|
---|
| 1066 |
|
---|
| 1067 | /*
|
---|
| 1068 | * Write n characters to a ppp link.
|
---|
| 1069 | * RETURN: >= 0 Number of characters written
|
---|
| 1070 | * -1 Failed to write to device
|
---|
| 1071 | */
|
---|
| 1072 | int
|
---|
| 1073 | pppWrite(int pd, const u_char *s, int n)
|
---|
| 1074 | {
|
---|
| 1075 | PPPControl *pc = &pppControl[pd];
|
---|
| 1076 | #if PPPOS_SUPPORT
|
---|
| 1077 | u_char c;
|
---|
| 1078 | u_int fcsOut;
|
---|
| 1079 | struct pbuf *headMB, *tailMB;
|
---|
| 1080 | #endif /* PPPOS_SUPPORT */
|
---|
| 1081 |
|
---|
| 1082 | #if PPPOE_SUPPORT
|
---|
| 1083 | if(pc->ethif) {
|
---|
| 1084 | return pppWriteOverEthernet(pd, s, n);
|
---|
| 1085 | }
|
---|
| 1086 | #endif /* PPPOE_SUPPORT */
|
---|
| 1087 |
|
---|
| 1088 | #if PPPOS_SUPPORT
|
---|
| 1089 | headMB = pbuf_alloc(PBUF_RAW, 0, PBUF_POOL);
|
---|
| 1090 | if (headMB == NULL) {
|
---|
| 1091 | LINK_STATS_INC(link.memerr);
|
---|
| 1092 | LINK_STATS_INC(link.proterr);
|
---|
| 1093 | snmp_inc_ifoutdiscards(&pc->netif);
|
---|
| 1094 | return PPPERR_ALLOC;
|
---|
| 1095 | }
|
---|
| 1096 |
|
---|
| 1097 | tailMB = headMB;
|
---|
| 1098 |
|
---|
| 1099 | /* If the link has been idle, we'll send a fresh flag character to
|
---|
| 1100 | * flush any noise. */
|
---|
| 1101 | if ((sys_jiffies() - pc->lastXMit) >= PPP_MAXIDLEFLAG) {
|
---|
| 1102 | tailMB = pppAppend(PPP_FLAG, tailMB, NULL);
|
---|
| 1103 | }
|
---|
| 1104 | pc->lastXMit = sys_jiffies();
|
---|
| 1105 |
|
---|
| 1106 | fcsOut = PPP_INITFCS;
|
---|
| 1107 | /* Load output buffer. */
|
---|
| 1108 | while (n-- > 0) {
|
---|
| 1109 | c = *s++;
|
---|
| 1110 |
|
---|
| 1111 | /* Update FCS before checking for special characters. */
|
---|
| 1112 | fcsOut = PPP_FCS(fcsOut, c);
|
---|
| 1113 |
|
---|
| 1114 | /* Copy to output buffer escaping special characters. */
|
---|
| 1115 | tailMB = pppAppend(c, tailMB, &pc->outACCM);
|
---|
| 1116 | }
|
---|
| 1117 |
|
---|
| 1118 | /* Add FCS and trailing flag. */
|
---|
| 1119 | c = ~fcsOut & 0xFF;
|
---|
| 1120 | tailMB = pppAppend(c, tailMB, &pc->outACCM);
|
---|
| 1121 | c = (~fcsOut >> 8) & 0xFF;
|
---|
| 1122 | tailMB = pppAppend(c, tailMB, &pc->outACCM);
|
---|
| 1123 | tailMB = pppAppend(PPP_FLAG, tailMB, NULL);
|
---|
| 1124 |
|
---|
| 1125 | /* If we failed to complete the packet, throw it away.
|
---|
| 1126 | * Otherwise send it. */
|
---|
| 1127 | if (!tailMB) {
|
---|
| 1128 | PPPDEBUG(LOG_WARNING,
|
---|
| 1129 | ("pppWrite[%d]: Alloc err - dropping pbuf len=%d\n", pd, headMB->len));
|
---|
| 1130 | /*"pppWrite[%d]: Alloc err - dropping %d:%.*H", pd, headMB->len, LWIP_MIN(headMB->len * 2, 40), headMB->payload)); */
|
---|
| 1131 | pbuf_free(headMB);
|
---|
| 1132 | LINK_STATS_INC(link.memerr);
|
---|
| 1133 | LINK_STATS_INC(link.proterr);
|
---|
| 1134 | snmp_inc_ifoutdiscards(&pc->netif);
|
---|
| 1135 | return PPPERR_ALLOC;
|
---|
| 1136 | }
|
---|
| 1137 |
|
---|
| 1138 | PPPDEBUG(LOG_INFO, ("pppWrite[%d]: len=%d\n", pd, headMB->len));
|
---|
| 1139 | /* "pppWrite[%d]: %d:%.*H", pd, headMB->len, LWIP_MIN(headMB->len * 2, 40), headMB->payload)); */
|
---|
| 1140 | nPut(pc, headMB);
|
---|
| 1141 | #endif /* PPPOS_SUPPORT */
|
---|
| 1142 |
|
---|
| 1143 | return PPPERR_NONE;
|
---|
| 1144 | }
|
---|
| 1145 |
|
---|
| 1146 | /*
|
---|
| 1147 | * ppp_send_config - configure the transmit characteristics of
|
---|
| 1148 | * the ppp interface.
|
---|
| 1149 | */
|
---|
| 1150 | void
|
---|
| 1151 | ppp_send_config( int unit, u16_t mtu, u32_t asyncmap, int pcomp, int accomp)
|
---|
| 1152 | {
|
---|
| 1153 | PPPControl *pc = &pppControl[unit];
|
---|
| 1154 | int i;
|
---|
| 1155 |
|
---|
| 1156 | pc->mtu = mtu;
|
---|
| 1157 | pc->pcomp = pcomp;
|
---|
| 1158 | pc->accomp = accomp;
|
---|
| 1159 |
|
---|
| 1160 | /* Load the ACCM bits for the 32 control codes. */
|
---|
| 1161 | for (i = 0; i < 32/8; i++) {
|
---|
| 1162 | pc->outACCM[i] = (u_char)((asyncmap >> (8 * i)) & 0xFF);
|
---|
| 1163 | }
|
---|
| 1164 | PPPDEBUG(LOG_INFO, ("ppp_send_config[%d]: outACCM=%X %X %X %X\n",
|
---|
| 1165 | unit,
|
---|
| 1166 | pc->outACCM[0], pc->outACCM[1], pc->outACCM[2], pc->outACCM[3]));
|
---|
| 1167 | }
|
---|
| 1168 |
|
---|
| 1169 |
|
---|
| 1170 | /*
|
---|
| 1171 | * ppp_set_xaccm - set the extended transmit ACCM for the interface.
|
---|
| 1172 | */
|
---|
| 1173 | void
|
---|
| 1174 | ppp_set_xaccm(int unit, ext_accm *accm)
|
---|
| 1175 | {
|
---|
| 1176 | SMEMCPY(pppControl[unit].outACCM, accm, sizeof(ext_accm));
|
---|
| 1177 | PPPDEBUG(LOG_INFO, ("ppp_set_xaccm[%d]: outACCM=%X %X %X %X\n",
|
---|
| 1178 | unit,
|
---|
| 1179 | pppControl[unit].outACCM[0],
|
---|
| 1180 | pppControl[unit].outACCM[1],
|
---|
| 1181 | pppControl[unit].outACCM[2],
|
---|
| 1182 | pppControl[unit].outACCM[3]));
|
---|
| 1183 | }
|
---|
| 1184 |
|
---|
| 1185 |
|
---|
| 1186 | /*
|
---|
| 1187 | * ppp_recv_config - configure the receive-side characteristics of
|
---|
| 1188 | * the ppp interface.
|
---|
| 1189 | */
|
---|
| 1190 | void
|
---|
| 1191 | ppp_recv_config( int unit, int mru, u32_t asyncmap, int pcomp, int accomp)
|
---|
| 1192 | {
|
---|
| 1193 | PPPControl *pc = &pppControl[unit];
|
---|
| 1194 | int i;
|
---|
| 1195 | SYS_ARCH_DECL_PROTECT(lev);
|
---|
| 1196 |
|
---|
| 1197 | LWIP_UNUSED_ARG(accomp);
|
---|
| 1198 | LWIP_UNUSED_ARG(pcomp);
|
---|
| 1199 | LWIP_UNUSED_ARG(mru);
|
---|
| 1200 |
|
---|
| 1201 | /* Load the ACCM bits for the 32 control codes. */
|
---|
| 1202 | SYS_ARCH_PROTECT(lev);
|
---|
| 1203 | for (i = 0; i < 32 / 8; i++) {
|
---|
| 1204 | /* @todo: does this work? ext_accm has been modified from pppd! */
|
---|
| 1205 | pc->rx.inACCM[i] = (u_char)(asyncmap >> (i * 8));
|
---|
| 1206 | }
|
---|
| 1207 | SYS_ARCH_UNPROTECT(lev);
|
---|
| 1208 | PPPDEBUG(LOG_INFO, ("ppp_recv_config[%d]: inACCM=%X %X %X %X\n",
|
---|
| 1209 | unit,
|
---|
| 1210 | pc->rx.inACCM[0], pc->rx.inACCM[1], pc->rx.inACCM[2], pc->rx.inACCM[3]));
|
---|
| 1211 | }
|
---|
| 1212 |
|
---|
| 1213 | #if 0
|
---|
| 1214 | /*
|
---|
| 1215 | * ccp_test - ask kernel whether a given compression method
|
---|
| 1216 | * is acceptable for use. Returns 1 if the method and parameters
|
---|
| 1217 | * are OK, 0 if the method is known but the parameters are not OK
|
---|
| 1218 | * (e.g. code size should be reduced), or -1 if the method is unknown.
|
---|
| 1219 | */
|
---|
| 1220 | int
|
---|
| 1221 | ccp_test( int unit, int opt_len, int for_transmit, u_char *opt_ptr)
|
---|
| 1222 | {
|
---|
| 1223 | return 0; /* XXX Currently no compression. */
|
---|
| 1224 | }
|
---|
| 1225 |
|
---|
| 1226 | /*
|
---|
| 1227 | * ccp_flags_set - inform kernel about the current state of CCP.
|
---|
| 1228 | */
|
---|
| 1229 | void
|
---|
| 1230 | ccp_flags_set(int unit, int isopen, int isup)
|
---|
| 1231 | {
|
---|
| 1232 | /* XXX */
|
---|
| 1233 | }
|
---|
| 1234 |
|
---|
| 1235 | /*
|
---|
| 1236 | * ccp_fatal_error - returns 1 if decompression was disabled as a
|
---|
| 1237 | * result of an error detected after decompression of a packet,
|
---|
| 1238 | * 0 otherwise. This is necessary because of patent nonsense.
|
---|
| 1239 | */
|
---|
| 1240 | int
|
---|
| 1241 | ccp_fatal_error(int unit)
|
---|
| 1242 | {
|
---|
| 1243 | /* XXX */
|
---|
| 1244 | return 0;
|
---|
| 1245 | }
|
---|
| 1246 | #endif
|
---|
| 1247 |
|
---|
| 1248 | /*
|
---|
| 1249 | * get_idle_time - return how long the link has been idle.
|
---|
| 1250 | */
|
---|
| 1251 | int
|
---|
| 1252 | get_idle_time(int u, struct ppp_idle *ip)
|
---|
| 1253 | {
|
---|
| 1254 | /* XXX */
|
---|
| 1255 | LWIP_UNUSED_ARG(u);
|
---|
| 1256 | LWIP_UNUSED_ARG(ip);
|
---|
| 1257 |
|
---|
| 1258 | return 0;
|
---|
| 1259 | }
|
---|
| 1260 |
|
---|
| 1261 |
|
---|
| 1262 | /*
|
---|
| 1263 | * Return user specified netmask, modified by any mask we might determine
|
---|
| 1264 | * for address `addr' (in network byte order).
|
---|
| 1265 | * Here we scan through the system's list of interfaces, looking for
|
---|
| 1266 | * any non-point-to-point interfaces which might appear to be on the same
|
---|
| 1267 | * network as `addr'. If we find any, we OR in their netmask to the
|
---|
| 1268 | * user-specified netmask.
|
---|
| 1269 | */
|
---|
| 1270 | u32_t
|
---|
| 1271 | GetMask(u32_t addr)
|
---|
| 1272 | {
|
---|
| 1273 | u32_t mask, nmask;
|
---|
| 1274 |
|
---|
| 1275 | addr = htonl(addr);
|
---|
| 1276 | if (IP_CLASSA(addr)) { /* determine network mask for address class */
|
---|
| 1277 | nmask = IP_CLASSA_NET;
|
---|
| 1278 | } else if (IP_CLASSB(addr)) {
|
---|
| 1279 | nmask = IP_CLASSB_NET;
|
---|
| 1280 | } else {
|
---|
| 1281 | nmask = IP_CLASSC_NET;
|
---|
| 1282 | }
|
---|
| 1283 |
|
---|
| 1284 | /* class D nets are disallowed by bad_ip_adrs */
|
---|
| 1285 | mask = subnetMask | htonl(nmask);
|
---|
| 1286 |
|
---|
| 1287 | /* XXX
|
---|
| 1288 | * Scan through the system's network interfaces.
|
---|
| 1289 | * Get each netmask and OR them into our mask.
|
---|
| 1290 | */
|
---|
| 1291 |
|
---|
| 1292 | return mask;
|
---|
| 1293 | }
|
---|
| 1294 |
|
---|
| 1295 | /*
|
---|
| 1296 | * sifvjcomp - config tcp header compression
|
---|
| 1297 | */
|
---|
| 1298 | int
|
---|
| 1299 | sifvjcomp(int pd, int vjcomp, u8_t cidcomp, u8_t maxcid)
|
---|
| 1300 | {
|
---|
| 1301 | #if PPPOS_SUPPORT && VJ_SUPPORT
|
---|
| 1302 | PPPControl *pc = &pppControl[pd];
|
---|
| 1303 |
|
---|
| 1304 | pc->vjEnabled = vjcomp;
|
---|
| 1305 | pc->vjComp.compressSlot = cidcomp;
|
---|
| 1306 | pc->vjComp.maxSlotIndex = maxcid;
|
---|
| 1307 | PPPDEBUG(LOG_INFO, ("sifvjcomp: VJ compress enable=%d slot=%d max slot=%d\n",
|
---|
| 1308 | vjcomp, cidcomp, maxcid));
|
---|
| 1309 | #else /* PPPOS_SUPPORT && VJ_SUPPORT */
|
---|
| 1310 | LWIP_UNUSED_ARG(pd);
|
---|
| 1311 | LWIP_UNUSED_ARG(vjcomp);
|
---|
| 1312 | LWIP_UNUSED_ARG(cidcomp);
|
---|
| 1313 | LWIP_UNUSED_ARG(maxcid);
|
---|
| 1314 | #endif /* PPPOS_SUPPORT && VJ_SUPPORT */
|
---|
| 1315 |
|
---|
| 1316 | return 0;
|
---|
| 1317 | }
|
---|
| 1318 |
|
---|
| 1319 | /*
|
---|
| 1320 | * pppifNetifInit - netif init callback
|
---|
| 1321 | */
|
---|
| 1322 | static err_t
|
---|
| 1323 | pppifNetifInit(struct netif *netif)
|
---|
| 1324 | {
|
---|
| 1325 | netif->name[0] = 'p';
|
---|
| 1326 | netif->name[1] = 'p';
|
---|
| 1327 | netif->output = pppifOutput;
|
---|
| 1328 | netif->mtu = pppMTU((int)(size_t)netif->state);
|
---|
| 1329 | netif->flags = NETIF_FLAG_POINTTOPOINT | NETIF_FLAG_LINK_UP;
|
---|
| 1330 | #if LWIP_NETIF_HOSTNAME
|
---|
| 1331 | /* @todo: Initialize interface hostname */
|
---|
| 1332 | /* netif_set_hostname(netif, "lwip"); */
|
---|
| 1333 | #endif /* LWIP_NETIF_HOSTNAME */
|
---|
| 1334 | return ERR_OK;
|
---|
| 1335 | }
|
---|
| 1336 |
|
---|
| 1337 |
|
---|
| 1338 | /*
|
---|
| 1339 | * sifup - Config the interface up and enable IP packets to pass.
|
---|
| 1340 | */
|
---|
| 1341 | int
|
---|
| 1342 | sifup(int pd)
|
---|
| 1343 | {
|
---|
| 1344 | PPPControl *pc = &pppControl[pd];
|
---|
| 1345 | int st = 1;
|
---|
| 1346 |
|
---|
| 1347 | if (pd < 0 || pd >= NUM_PPP || !pc->openFlag) {
|
---|
| 1348 | st = 0;
|
---|
| 1349 | PPPDEBUG(LOG_WARNING, ("sifup[%d]: bad parms\n", pd));
|
---|
| 1350 | } else {
|
---|
| 1351 | netif_remove(&pc->netif);
|
---|
| 1352 | if (netif_add(&pc->netif, &pc->addrs.our_ipaddr, &pc->addrs.netmask,
|
---|
| 1353 | &pc->addrs.his_ipaddr, (void *)(size_t)pd, pppifNetifInit, ip_input)) {
|
---|
| 1354 | netif_set_up(&pc->netif);
|
---|
| 1355 | pc->if_up = 1;
|
---|
| 1356 | pc->errCode = PPPERR_NONE;
|
---|
| 1357 |
|
---|
| 1358 | PPPDEBUG(LOG_DEBUG, ("sifup: unit %d: linkStatusCB=%p errCode=%d\n", pd, pc->linkStatusCB, pc->errCode));
|
---|
| 1359 | if (pc->linkStatusCB) {
|
---|
| 1360 | pc->linkStatusCB(pc->linkStatusCtx, pc->errCode, &pc->addrs);
|
---|
| 1361 | }
|
---|
| 1362 | } else {
|
---|
| 1363 | st = 0;
|
---|
| 1364 | PPPDEBUG(LOG_ERR, ("sifup[%d]: netif_add failed\n", pd));
|
---|
| 1365 | }
|
---|
| 1366 | }
|
---|
| 1367 |
|
---|
| 1368 | return st;
|
---|
| 1369 | }
|
---|
| 1370 |
|
---|
| 1371 | /*
|
---|
| 1372 | * sifnpmode - Set the mode for handling packets for a given NP.
|
---|
| 1373 | */
|
---|
| 1374 | int
|
---|
| 1375 | sifnpmode(int u, int proto, enum NPmode mode)
|
---|
| 1376 | {
|
---|
| 1377 | LWIP_UNUSED_ARG(u);
|
---|
| 1378 | LWIP_UNUSED_ARG(proto);
|
---|
| 1379 | LWIP_UNUSED_ARG(mode);
|
---|
| 1380 | return 0;
|
---|
| 1381 | }
|
---|
| 1382 |
|
---|
| 1383 | /*
|
---|
| 1384 | * sifdown - Config the interface down and disable IP.
|
---|
| 1385 | */
|
---|
| 1386 | int
|
---|
| 1387 | sifdown(int pd)
|
---|
| 1388 | {
|
---|
| 1389 | PPPControl *pc = &pppControl[pd];
|
---|
| 1390 | int st = 1;
|
---|
| 1391 |
|
---|
| 1392 | if (pd < 0 || pd >= NUM_PPP || !pc->openFlag) {
|
---|
| 1393 | st = 0;
|
---|
| 1394 | PPPDEBUG(LOG_WARNING, ("sifdown[%d]: bad parms\n", pd));
|
---|
| 1395 | } else {
|
---|
| 1396 | pc->if_up = 0;
|
---|
| 1397 | /* make sure the netif status callback is called */
|
---|
| 1398 | netif_set_down(&pc->netif);
|
---|
| 1399 | netif_remove(&pc->netif);
|
---|
| 1400 | PPPDEBUG(LOG_DEBUG, ("sifdown: unit %d: linkStatusCB=%p errCode=%d\n", pd, pc->linkStatusCB, pc->errCode));
|
---|
| 1401 | if (pc->linkStatusCB) {
|
---|
| 1402 | pc->linkStatusCB(pc->linkStatusCtx, PPPERR_CONNECT, NULL);
|
---|
| 1403 | }
|
---|
| 1404 | }
|
---|
| 1405 | return st;
|
---|
| 1406 | }
|
---|
| 1407 |
|
---|
| 1408 | /**
|
---|
| 1409 | * sifaddr - Config the interface IP addresses and netmask.
|
---|
| 1410 | * @param pd Interface unit ???
|
---|
| 1411 | * @param o Our IP address ???
|
---|
| 1412 | * @param h His IP address ???
|
---|
| 1413 | * @param m IP subnet mask ???
|
---|
| 1414 | * @param ns1 Primary DNS
|
---|
| 1415 | * @param ns2 Secondary DNS
|
---|
| 1416 | */
|
---|
| 1417 | int
|
---|
| 1418 | sifaddr( int pd, u32_t o, u32_t h, u32_t m, u32_t ns1, u32_t ns2)
|
---|
| 1419 | {
|
---|
| 1420 | PPPControl *pc = &pppControl[pd];
|
---|
| 1421 | int st = 1;
|
---|
| 1422 |
|
---|
| 1423 | if (pd < 0 || pd >= NUM_PPP || !pc->openFlag) {
|
---|
| 1424 | st = 0;
|
---|
| 1425 | PPPDEBUG(LOG_WARNING, ("sifup[%d]: bad parms\n", pd));
|
---|
| 1426 | } else {
|
---|
| 1427 | SMEMCPY(&pc->addrs.our_ipaddr, &o, sizeof(o));
|
---|
| 1428 | SMEMCPY(&pc->addrs.his_ipaddr, &h, sizeof(h));
|
---|
| 1429 | SMEMCPY(&pc->addrs.netmask, &m, sizeof(m));
|
---|
| 1430 | SMEMCPY(&pc->addrs.dns1, &ns1, sizeof(ns1));
|
---|
| 1431 | SMEMCPY(&pc->addrs.dns2, &ns2, sizeof(ns2));
|
---|
| 1432 | }
|
---|
| 1433 | return st;
|
---|
| 1434 | }
|
---|
| 1435 |
|
---|
| 1436 | /**
|
---|
| 1437 | * cifaddr - Clear the interface IP addresses, and delete routes
|
---|
| 1438 | * through the interface if possible.
|
---|
| 1439 | * @param pd Interface unit ???
|
---|
| 1440 | * @param o Our IP address ???
|
---|
| 1441 | * @param h IP broadcast address ???
|
---|
| 1442 | */
|
---|
| 1443 | int
|
---|
| 1444 | cifaddr( int pd, u32_t o, u32_t h)
|
---|
| 1445 | {
|
---|
| 1446 | PPPControl *pc = &pppControl[pd];
|
---|
| 1447 | int st = 1;
|
---|
| 1448 |
|
---|
| 1449 | LWIP_UNUSED_ARG(o);
|
---|
| 1450 | LWIP_UNUSED_ARG(h);
|
---|
| 1451 | if (pd < 0 || pd >= NUM_PPP || !pc->openFlag) {
|
---|
| 1452 | st = 0;
|
---|
| 1453 | PPPDEBUG(LOG_WARNING, ("sifup[%d]: bad parms\n", pd));
|
---|
| 1454 | } else {
|
---|
| 1455 | IP4_ADDR(&pc->addrs.our_ipaddr, 0,0,0,0);
|
---|
| 1456 | IP4_ADDR(&pc->addrs.his_ipaddr, 0,0,0,0);
|
---|
| 1457 | IP4_ADDR(&pc->addrs.netmask, 255,255,255,0);
|
---|
| 1458 | IP4_ADDR(&pc->addrs.dns1, 0,0,0,0);
|
---|
| 1459 | IP4_ADDR(&pc->addrs.dns2, 0,0,0,0);
|
---|
| 1460 | }
|
---|
| 1461 | return st;
|
---|
| 1462 | }
|
---|
| 1463 |
|
---|
| 1464 | /*
|
---|
| 1465 | * sifdefaultroute - assign a default route through the address given.
|
---|
| 1466 | */
|
---|
| 1467 | int
|
---|
| 1468 | sifdefaultroute(int pd, u32_t l, u32_t g)
|
---|
| 1469 | {
|
---|
| 1470 | PPPControl *pc = &pppControl[pd];
|
---|
| 1471 | int st = 1;
|
---|
| 1472 |
|
---|
| 1473 | LWIP_UNUSED_ARG(l);
|
---|
| 1474 | LWIP_UNUSED_ARG(g);
|
---|
| 1475 |
|
---|
| 1476 | if (pd < 0 || pd >= NUM_PPP || !pc->openFlag) {
|
---|
| 1477 | st = 0;
|
---|
| 1478 | PPPDEBUG(LOG_WARNING, ("sifup[%d]: bad parms\n", pd));
|
---|
| 1479 | } else {
|
---|
| 1480 | netif_set_default(&pc->netif);
|
---|
| 1481 | }
|
---|
| 1482 |
|
---|
| 1483 | /* TODO: check how PPP handled the netMask, previously not set by ipSetDefault */
|
---|
| 1484 |
|
---|
| 1485 | return st;
|
---|
| 1486 | }
|
---|
| 1487 |
|
---|
| 1488 | /*
|
---|
| 1489 | * cifdefaultroute - delete a default route through the address given.
|
---|
| 1490 | */
|
---|
| 1491 | int
|
---|
| 1492 | cifdefaultroute(int pd, u32_t l, u32_t g)
|
---|
| 1493 | {
|
---|
| 1494 | PPPControl *pc = &pppControl[pd];
|
---|
| 1495 | int st = 1;
|
---|
| 1496 |
|
---|
| 1497 | LWIP_UNUSED_ARG(l);
|
---|
| 1498 | LWIP_UNUSED_ARG(g);
|
---|
| 1499 |
|
---|
| 1500 | if (pd < 0 || pd >= NUM_PPP || !pc->openFlag) {
|
---|
| 1501 | st = 0;
|
---|
| 1502 | PPPDEBUG(LOG_WARNING, ("sifup[%d]: bad parms\n", pd));
|
---|
| 1503 | } else {
|
---|
| 1504 | netif_set_default(NULL);
|
---|
| 1505 | }
|
---|
| 1506 |
|
---|
| 1507 | return st;
|
---|
| 1508 | }
|
---|
| 1509 |
|
---|
| 1510 | /**********************************/
|
---|
| 1511 | /*** LOCAL FUNCTION DEFINITIONS ***/
|
---|
| 1512 | /**********************************/
|
---|
| 1513 |
|
---|
| 1514 | #if PPPOS_SUPPORT && PPP_INPROC_OWNTHREAD
|
---|
| 1515 | /* The main PPP process function. This implements the state machine according
|
---|
| 1516 | * to section 4 of RFC 1661: The Point-To-Point Protocol. */
|
---|
| 1517 | static void
|
---|
| 1518 | pppInputThread(void *arg)
|
---|
| 1519 | {
|
---|
| 1520 | int count;
|
---|
| 1521 | PPPControlRx *pcrx = arg;
|
---|
| 1522 |
|
---|
| 1523 | while (lcp_phase[pcrx->pd] != PHASE_DEAD) {
|
---|
| 1524 | count = sio_read(pcrx->fd, pcrx->rxbuf, PPPOS_RX_BUFSIZE);
|
---|
| 1525 | if(count > 0) {
|
---|
| 1526 | pppInProc(pcrx, pcrx->rxbuf, count);
|
---|
| 1527 | } else {
|
---|
| 1528 | /* nothing received, give other tasks a chance to run */
|
---|
| 1529 | sys_msleep(1);
|
---|
| 1530 | }
|
---|
| 1531 | }
|
---|
| 1532 | }
|
---|
| 1533 | #endif /* PPPOS_SUPPORT && PPP_INPROC_OWNTHREAD */
|
---|
| 1534 |
|
---|
| 1535 | #if PPPOE_SUPPORT
|
---|
| 1536 |
|
---|
| 1537 | void
|
---|
| 1538 | pppOverEthernetInitFailed(int pd)
|
---|
| 1539 | {
|
---|
| 1540 | PPPControl* pc;
|
---|
| 1541 |
|
---|
| 1542 | pppHup(pd);
|
---|
| 1543 | pppStop(pd);
|
---|
| 1544 |
|
---|
| 1545 | pc = &pppControl[pd];
|
---|
| 1546 | pppoe_destroy(&pc->netif);
|
---|
| 1547 | pc->openFlag = 0;
|
---|
| 1548 |
|
---|
| 1549 | if(pc->linkStatusCB) {
|
---|
| 1550 | pc->linkStatusCB(pc->linkStatusCtx, pc->errCode ? pc->errCode : PPPERR_PROTOCOL, NULL);
|
---|
| 1551 | }
|
---|
| 1552 | }
|
---|
| 1553 |
|
---|
| 1554 | static void
|
---|
| 1555 | pppOverEthernetLinkStatusCB(int pd, int up)
|
---|
| 1556 | {
|
---|
| 1557 | if(up) {
|
---|
| 1558 | PPPDEBUG(LOG_INFO, ("pppOverEthernetLinkStatusCB: unit %d: Connecting\n", pd));
|
---|
| 1559 | pppStart(pd);
|
---|
| 1560 | } else {
|
---|
| 1561 | pppOverEthernetInitFailed(pd);
|
---|
| 1562 | }
|
---|
| 1563 | }
|
---|
| 1564 | #endif /* PPPOE_SUPPORT */
|
---|
| 1565 |
|
---|
| 1566 | struct pbuf *
|
---|
| 1567 | pppSingleBuf(struct pbuf *p)
|
---|
| 1568 | {
|
---|
| 1569 | struct pbuf *q, *b;
|
---|
| 1570 | u_char *pl;
|
---|
| 1571 |
|
---|
| 1572 | if(p->tot_len == p->len) {
|
---|
| 1573 | return p;
|
---|
| 1574 | }
|
---|
| 1575 |
|
---|
| 1576 | q = pbuf_alloc(PBUF_RAW, p->tot_len, PBUF_RAM);
|
---|
| 1577 | if(!q) {
|
---|
| 1578 | PPPDEBUG(LOG_ERR,
|
---|
| 1579 | ("pppSingleBuf: unable to alloc new buf (%d)\n", p->tot_len));
|
---|
| 1580 | return p; /* live dangerously */
|
---|
| 1581 | }
|
---|
| 1582 |
|
---|
| 1583 | for(b = p, pl = q->payload; b != NULL; b = b->next) {
|
---|
| 1584 | MEMCPY(pl, b->payload, b->len);
|
---|
| 1585 | pl += b->len;
|
---|
| 1586 | }
|
---|
| 1587 |
|
---|
| 1588 | pbuf_free(p);
|
---|
| 1589 |
|
---|
| 1590 | return q;
|
---|
| 1591 | }
|
---|
| 1592 |
|
---|
| 1593 | struct pppInputHeader {
|
---|
| 1594 | int unit;
|
---|
| 1595 | u16_t proto;
|
---|
| 1596 | };
|
---|
| 1597 |
|
---|
| 1598 | /*
|
---|
| 1599 | * Pass the processed input packet to the appropriate handler.
|
---|
| 1600 | * This function and all handlers run in the context of the tcpip_thread
|
---|
| 1601 | */
|
---|
| 1602 | static void
|
---|
| 1603 | pppInput(void *arg)
|
---|
| 1604 | {
|
---|
| 1605 | struct pbuf *nb = (struct pbuf *)arg;
|
---|
| 1606 | u16_t protocol;
|
---|
| 1607 | int pd;
|
---|
| 1608 |
|
---|
| 1609 | pd = ((struct pppInputHeader *)nb->payload)->unit;
|
---|
| 1610 | protocol = ((struct pppInputHeader *)nb->payload)->proto;
|
---|
| 1611 |
|
---|
| 1612 | if(pbuf_header(nb, -(int)sizeof(struct pppInputHeader))) {
|
---|
| 1613 | LWIP_ASSERT("pbuf_header failed\n", 0);
|
---|
| 1614 | goto drop;
|
---|
| 1615 | }
|
---|
| 1616 |
|
---|
| 1617 | LINK_STATS_INC(link.recv);
|
---|
| 1618 | snmp_inc_ifinucastpkts(&pppControl[pd].netif);
|
---|
| 1619 | snmp_add_ifinoctets(&pppControl[pd].netif, nb->tot_len);
|
---|
| 1620 |
|
---|
| 1621 | /*
|
---|
| 1622 | * Toss all non-LCP packets unless LCP is OPEN.
|
---|
| 1623 | * Until we get past the authentication phase, toss all packets
|
---|
| 1624 | * except LCP, LQR and authentication packets.
|
---|
| 1625 | */
|
---|
| 1626 | if((lcp_phase[pd] <= PHASE_AUTHENTICATE) && (protocol != PPP_LCP)) {
|
---|
| 1627 | if(!((protocol == PPP_LQR) || (protocol == PPP_PAP) || (protocol == PPP_CHAP)) ||
|
---|
| 1628 | (lcp_phase[pd] != PHASE_AUTHENTICATE)) {
|
---|
| 1629 | PPPDEBUG(LOG_INFO, ("pppInput: discarding proto 0x%"X16_F" in phase %d\n", protocol, lcp_phase[pd]));
|
---|
| 1630 | goto drop;
|
---|
| 1631 | }
|
---|
| 1632 | }
|
---|
| 1633 |
|
---|
| 1634 | switch(protocol) {
|
---|
| 1635 | case PPP_VJC_COMP: /* VJ compressed TCP */
|
---|
| 1636 | #if PPPOS_SUPPORT && VJ_SUPPORT
|
---|
| 1637 | PPPDEBUG(LOG_INFO, ("pppInput[%d]: vj_comp in pbuf len=%d\n", pd, nb->len));
|
---|
| 1638 | /*
|
---|
| 1639 | * Clip off the VJ header and prepend the rebuilt TCP/IP header and
|
---|
| 1640 | * pass the result to IP.
|
---|
| 1641 | */
|
---|
| 1642 | if ((vj_uncompress_tcp(&nb, &pppControl[pd].vjComp) >= 0) && (pppControl[pd].netif.input)) {
|
---|
| 1643 | pppControl[pd].netif.input(nb, &pppControl[pd].netif);
|
---|
| 1644 | return;
|
---|
| 1645 | }
|
---|
| 1646 | /* Something's wrong so drop it. */
|
---|
| 1647 | PPPDEBUG(LOG_WARNING, ("pppInput[%d]: Dropping VJ compressed\n", pd));
|
---|
| 1648 | #else /* PPPOS_SUPPORT && VJ_SUPPORT */
|
---|
| 1649 | /* No handler for this protocol so drop the packet. */
|
---|
| 1650 | PPPDEBUG(LOG_INFO, ("pppInput[%d]: drop VJ Comp in %d:%s\n", pd, nb->len, nb->payload));
|
---|
| 1651 | #endif /* PPPOS_SUPPORT && VJ_SUPPORT */
|
---|
| 1652 | break;
|
---|
| 1653 |
|
---|
| 1654 | case PPP_VJC_UNCOMP: /* VJ uncompressed TCP */
|
---|
| 1655 | #if PPPOS_SUPPORT && VJ_SUPPORT
|
---|
| 1656 | PPPDEBUG(LOG_INFO, ("pppInput[%d]: vj_un in pbuf len=%d\n", pd, nb->len));
|
---|
| 1657 | /*
|
---|
| 1658 | * Process the TCP/IP header for VJ header compression and then pass
|
---|
| 1659 | * the packet to IP.
|
---|
| 1660 | */
|
---|
| 1661 | if ((vj_uncompress_uncomp(nb, &pppControl[pd].vjComp) >= 0) && pppControl[pd].netif.input) {
|
---|
| 1662 | pppControl[pd].netif.input(nb, &pppControl[pd].netif);
|
---|
| 1663 | return;
|
---|
| 1664 | }
|
---|
| 1665 | /* Something's wrong so drop it. */
|
---|
| 1666 | PPPDEBUG(LOG_WARNING, ("pppInput[%d]: Dropping VJ uncompressed\n", pd));
|
---|
| 1667 | #else /* PPPOS_SUPPORT && VJ_SUPPORT */
|
---|
| 1668 | /* No handler for this protocol so drop the packet. */
|
---|
| 1669 | PPPDEBUG(LOG_INFO,
|
---|
| 1670 | ("pppInput[%d]: drop VJ UnComp in %d:.*H\n",
|
---|
| 1671 | pd, nb->len, LWIP_MIN(nb->len * 2, 40), nb->payload));
|
---|
| 1672 | #endif /* PPPOS_SUPPORT && VJ_SUPPORT */
|
---|
| 1673 | break;
|
---|
| 1674 |
|
---|
| 1675 | case PPP_IP: /* Internet Protocol */
|
---|
| 1676 | PPPDEBUG(LOG_INFO, ("pppInput[%d]: ip in pbuf len=%d\n", pd, nb->len));
|
---|
| 1677 | if (pppControl[pd].netif.input) {
|
---|
| 1678 | pppControl[pd].netif.input(nb, &pppControl[pd].netif);
|
---|
| 1679 | return;
|
---|
| 1680 | }
|
---|
| 1681 | break;
|
---|
| 1682 |
|
---|
| 1683 | default: {
|
---|
| 1684 | struct protent *protp;
|
---|
| 1685 | int i;
|
---|
| 1686 |
|
---|
| 1687 | /*
|
---|
| 1688 | * Upcall the proper protocol input routine.
|
---|
| 1689 | */
|
---|
| 1690 | for (i = 0; (protp = ppp_protocols[i]) != NULL; ++i) {
|
---|
| 1691 | if (protp->protocol == protocol && protp->enabled_flag) {
|
---|
| 1692 | PPPDEBUG(LOG_INFO, ("pppInput[%d]: %s len=%d\n", pd, protp->name, nb->len));
|
---|
| 1693 | nb = pppSingleBuf(nb);
|
---|
| 1694 | (*protp->input)(pd, nb->payload, nb->len);
|
---|
| 1695 | PPPDEBUG(LOG_DETAIL, ("pppInput[%d]: packet processed\n", pd));
|
---|
| 1696 | goto out;
|
---|
| 1697 | }
|
---|
| 1698 | }
|
---|
| 1699 |
|
---|
| 1700 | /* No handler for this protocol so reject the packet. */
|
---|
| 1701 | PPPDEBUG(LOG_INFO, ("pppInput[%d]: rejecting unsupported proto 0x%"X16_F" len=%d\n", pd, protocol, nb->len));
|
---|
| 1702 | if (pbuf_header(nb, sizeof(protocol))) {
|
---|
| 1703 | LWIP_ASSERT("pbuf_header failed\n", 0);
|
---|
| 1704 | goto drop;
|
---|
| 1705 | }
|
---|
| 1706 | #if BYTE_ORDER == LITTLE_ENDIAN
|
---|
| 1707 | protocol = htons(protocol);
|
---|
| 1708 | #endif /* BYTE_ORDER == LITTLE_ENDIAN */
|
---|
| 1709 | SMEMCPY(nb->payload, &protocol, sizeof(protocol));
|
---|
| 1710 | lcp_sprotrej(pd, nb->payload, nb->len);
|
---|
| 1711 | }
|
---|
| 1712 | break;
|
---|
| 1713 | }
|
---|
| 1714 |
|
---|
| 1715 | drop:
|
---|
| 1716 | LINK_STATS_INC(link.drop);
|
---|
| 1717 | snmp_inc_ifindiscards(&pppControl[pd].netif);
|
---|
| 1718 |
|
---|
| 1719 | out:
|
---|
| 1720 | pbuf_free(nb);
|
---|
| 1721 | return;
|
---|
| 1722 | }
|
---|
| 1723 |
|
---|
| 1724 | #if PPPOS_SUPPORT
|
---|
| 1725 | /*
|
---|
| 1726 | * Drop the input packet.
|
---|
| 1727 | */
|
---|
| 1728 | static void
|
---|
| 1729 | pppFreeCurrentInputPacket(PPPControlRx *pcrx)
|
---|
| 1730 | {
|
---|
| 1731 | if (pcrx->inHead != NULL) {
|
---|
| 1732 | if (pcrx->inTail && (pcrx->inTail != pcrx->inHead)) {
|
---|
| 1733 | pbuf_free(pcrx->inTail);
|
---|
| 1734 | }
|
---|
| 1735 | pbuf_free(pcrx->inHead);
|
---|
| 1736 | pcrx->inHead = NULL;
|
---|
| 1737 | }
|
---|
| 1738 | pcrx->inTail = NULL;
|
---|
| 1739 | }
|
---|
| 1740 |
|
---|
| 1741 | /*
|
---|
| 1742 | * Drop the input packet and increase error counters.
|
---|
| 1743 | */
|
---|
| 1744 | static void
|
---|
| 1745 | pppDrop(PPPControlRx *pcrx)
|
---|
| 1746 | {
|
---|
| 1747 | if (pcrx->inHead != NULL) {
|
---|
| 1748 | #if 0
|
---|
| 1749 | PPPDEBUG(LOG_INFO, ("pppDrop: %d:%.*H\n", pcrx->inHead->len, min(60, pcrx->inHead->len * 2), pcrx->inHead->payload));
|
---|
| 1750 | #endif
|
---|
| 1751 | PPPDEBUG(LOG_INFO, ("pppDrop: pbuf len=%d, addr %p\n", pcrx->inHead->len, (void*)pcrx->inHead));
|
---|
| 1752 | }
|
---|
| 1753 | pppFreeCurrentInputPacket(pcrx);
|
---|
| 1754 | #if VJ_SUPPORT
|
---|
| 1755 | vj_uncompress_err(&pppControl[pcrx->pd].vjComp);
|
---|
| 1756 | #endif /* VJ_SUPPORT */
|
---|
| 1757 |
|
---|
| 1758 | LINK_STATS_INC(link.drop);
|
---|
| 1759 | snmp_inc_ifindiscards(&pppControl[pcrx->pd].netif);
|
---|
| 1760 | }
|
---|
| 1761 |
|
---|
| 1762 | #if !PPP_INPROC_OWNTHREAD
|
---|
| 1763 | /** Pass received raw characters to PPPoS to be decoded. This function is
|
---|
| 1764 | * thread-safe and can be called from a dedicated RX-thread or from a main-loop.
|
---|
| 1765 | *
|
---|
| 1766 | * @param pd PPP descriptor index, returned by pppOpen()
|
---|
| 1767 | * @param data received data
|
---|
| 1768 | * @param len length of received data
|
---|
| 1769 | */
|
---|
| 1770 | void
|
---|
| 1771 | pppos_input(int pd, u_char* data, int len)
|
---|
| 1772 | {
|
---|
| 1773 | pppInProc(&pppControl[pd].rx, data, len);
|
---|
| 1774 | }
|
---|
| 1775 | #endif
|
---|
| 1776 |
|
---|
| 1777 | /**
|
---|
| 1778 | * Process a received octet string.
|
---|
| 1779 | */
|
---|
| 1780 | static void
|
---|
| 1781 | pppInProc(PPPControlRx *pcrx, u_char *s, int l)
|
---|
| 1782 | {
|
---|
| 1783 | struct pbuf *nextNBuf;
|
---|
| 1784 | u_char curChar;
|
---|
| 1785 | u_char escaped;
|
---|
| 1786 | SYS_ARCH_DECL_PROTECT(lev);
|
---|
| 1787 |
|
---|
| 1788 | PPPDEBUG(LOG_DEBUG, ("pppInProc[%d]: got %d bytes\n", pcrx->pd, l));
|
---|
| 1789 | while (l-- > 0) {
|
---|
| 1790 | curChar = *s++;
|
---|
| 1791 |
|
---|
| 1792 | SYS_ARCH_PROTECT(lev);
|
---|
| 1793 | escaped = ESCAPE_P(pcrx->inACCM, curChar);
|
---|
| 1794 | SYS_ARCH_UNPROTECT(lev);
|
---|
| 1795 | /* Handle special characters. */
|
---|
| 1796 | if (escaped) {
|
---|
| 1797 | /* Check for escape sequences. */
|
---|
| 1798 | /* XXX Note that this does not handle an escaped 0x5d character which
|
---|
| 1799 | * would appear as an escape character. Since this is an ASCII ']'
|
---|
| 1800 | * and there is no reason that I know of to escape it, I won't complicate
|
---|
| 1801 | * the code to handle this case. GLL */
|
---|
| 1802 | if (curChar == PPP_ESCAPE) {
|
---|
| 1803 | pcrx->inEscaped = 1;
|
---|
| 1804 | /* Check for the flag character. */
|
---|
| 1805 | } else if (curChar == PPP_FLAG) {
|
---|
| 1806 | /* If this is just an extra flag character, ignore it. */
|
---|
| 1807 | if (pcrx->inState <= PDADDRESS) {
|
---|
| 1808 | /* ignore it */;
|
---|
| 1809 | /* If we haven't received the packet header, drop what has come in. */
|
---|
| 1810 | } else if (pcrx->inState < PDDATA) {
|
---|
| 1811 | PPPDEBUG(LOG_WARNING,
|
---|
| 1812 | ("pppInProc[%d]: Dropping incomplete packet %d\n",
|
---|
| 1813 | pcrx->pd, pcrx->inState));
|
---|
| 1814 | LINK_STATS_INC(link.lenerr);
|
---|
| 1815 | pppDrop(pcrx);
|
---|
| 1816 | /* If the fcs is invalid, drop the packet. */
|
---|
| 1817 | } else if (pcrx->inFCS != PPP_GOODFCS) {
|
---|
| 1818 | PPPDEBUG(LOG_INFO,
|
---|
| 1819 | ("pppInProc[%d]: Dropping bad fcs 0x%"X16_F" proto=0x%"X16_F"\n",
|
---|
| 1820 | pcrx->pd, pcrx->inFCS, pcrx->inProtocol));
|
---|
| 1821 | /* Note: If you get lots of these, check for UART frame errors or try different baud rate */
|
---|
| 1822 | LINK_STATS_INC(link.chkerr);
|
---|
| 1823 | pppDrop(pcrx);
|
---|
| 1824 | /* Otherwise it's a good packet so pass it on. */
|
---|
| 1825 | } else {
|
---|
| 1826 | struct pbuf *inp;
|
---|
| 1827 | /* Trim off the checksum. */
|
---|
| 1828 | if(pcrx->inTail->len >= 2) {
|
---|
| 1829 | pcrx->inTail->len -= 2;
|
---|
| 1830 |
|
---|
| 1831 | pcrx->inTail->tot_len = pcrx->inTail->len;
|
---|
| 1832 | if (pcrx->inTail != pcrx->inHead) {
|
---|
| 1833 | pbuf_cat(pcrx->inHead, pcrx->inTail);
|
---|
| 1834 | }
|
---|
| 1835 | } else {
|
---|
| 1836 | pcrx->inTail->tot_len = pcrx->inTail->len;
|
---|
| 1837 | if (pcrx->inTail != pcrx->inHead) {
|
---|
| 1838 | pbuf_cat(pcrx->inHead, pcrx->inTail);
|
---|
| 1839 | }
|
---|
| 1840 |
|
---|
| 1841 | pbuf_realloc(pcrx->inHead, pcrx->inHead->tot_len - 2);
|
---|
| 1842 | }
|
---|
| 1843 |
|
---|
| 1844 | /* Dispatch the packet thereby consuming it. */
|
---|
| 1845 | inp = pcrx->inHead;
|
---|
| 1846 | /* Packet consumed, release our references. */
|
---|
| 1847 | pcrx->inHead = NULL;
|
---|
| 1848 | pcrx->inTail = NULL;
|
---|
| 1849 | #if PPP_INPROC_MULTITHREADED
|
---|
| 1850 | if(tcpip_callback_with_block(pppInput, inp, 0) != ERR_OK) {
|
---|
| 1851 | PPPDEBUG(LOG_ERR, ("pppInProc[%d]: tcpip_callback() failed, dropping packet\n", pcrx->pd));
|
---|
| 1852 | pbuf_free(inp);
|
---|
| 1853 | LINK_STATS_INC(link.drop);
|
---|
| 1854 | snmp_inc_ifindiscards(&pppControl[pcrx->pd].netif);
|
---|
| 1855 | }
|
---|
| 1856 | #else /* PPP_INPROC_MULTITHREADED */
|
---|
| 1857 | pppInput(inp);
|
---|
| 1858 | #endif /* PPP_INPROC_MULTITHREADED */
|
---|
| 1859 | }
|
---|
| 1860 |
|
---|
| 1861 | /* Prepare for a new packet. */
|
---|
| 1862 | pcrx->inFCS = PPP_INITFCS;
|
---|
| 1863 | pcrx->inState = PDADDRESS;
|
---|
| 1864 | pcrx->inEscaped = 0;
|
---|
| 1865 | /* Other characters are usually control characters that may have
|
---|
| 1866 | * been inserted by the physical layer so here we just drop them. */
|
---|
| 1867 | } else {
|
---|
| 1868 | PPPDEBUG(LOG_WARNING,
|
---|
| 1869 | ("pppInProc[%d]: Dropping ACCM char <%d>\n", pcrx->pd, curChar));
|
---|
| 1870 | }
|
---|
| 1871 | /* Process other characters. */
|
---|
| 1872 | } else {
|
---|
| 1873 | /* Unencode escaped characters. */
|
---|
| 1874 | if (pcrx->inEscaped) {
|
---|
| 1875 | pcrx->inEscaped = 0;
|
---|
| 1876 | curChar ^= PPP_TRANS;
|
---|
| 1877 | }
|
---|
| 1878 |
|
---|
| 1879 | /* Process character relative to current state. */
|
---|
| 1880 | switch(pcrx->inState) {
|
---|
| 1881 | case PDIDLE: /* Idle state - waiting. */
|
---|
| 1882 | /* Drop the character if it's not 0xff
|
---|
| 1883 | * we would have processed a flag character above. */
|
---|
| 1884 | if (curChar != PPP_ALLSTATIONS) {
|
---|
| 1885 | break;
|
---|
| 1886 | }
|
---|
| 1887 |
|
---|
| 1888 | /* Fall through */
|
---|
| 1889 | case PDSTART: /* Process start flag. */
|
---|
| 1890 | /* Prepare for a new packet. */
|
---|
| 1891 | pcrx->inFCS = PPP_INITFCS;
|
---|
| 1892 |
|
---|
| 1893 | /* Fall through */
|
---|
| 1894 | case PDADDRESS: /* Process address field. */
|
---|
| 1895 | if (curChar == PPP_ALLSTATIONS) {
|
---|
| 1896 | pcrx->inState = PDCONTROL;
|
---|
| 1897 | break;
|
---|
| 1898 | }
|
---|
| 1899 | /* Else assume compressed address and control fields so
|
---|
| 1900 | * fall through to get the protocol... */
|
---|
| 1901 | case PDCONTROL: /* Process control field. */
|
---|
| 1902 | /* If we don't get a valid control code, restart. */
|
---|
| 1903 | if (curChar == PPP_UI) {
|
---|
| 1904 | pcrx->inState = PDPROTOCOL1;
|
---|
| 1905 | break;
|
---|
| 1906 | }
|
---|
| 1907 | #if 0
|
---|
| 1908 | else {
|
---|
| 1909 | PPPDEBUG(LOG_WARNING,
|
---|
| 1910 | ("pppInProc[%d]: Invalid control <%d>\n", pcrx->pd, curChar));
|
---|
| 1911 | pcrx->inState = PDSTART;
|
---|
| 1912 | }
|
---|
| 1913 | #endif
|
---|
| 1914 | case PDPROTOCOL1: /* Process protocol field 1. */
|
---|
| 1915 | /* If the lower bit is set, this is the end of the protocol
|
---|
| 1916 | * field. */
|
---|
| 1917 | if (curChar & 1) {
|
---|
| 1918 | pcrx->inProtocol = curChar;
|
---|
| 1919 | pcrx->inState = PDDATA;
|
---|
| 1920 | } else {
|
---|
| 1921 | pcrx->inProtocol = (u_int)curChar << 8;
|
---|
| 1922 | pcrx->inState = PDPROTOCOL2;
|
---|
| 1923 | }
|
---|
| 1924 | break;
|
---|
| 1925 | case PDPROTOCOL2: /* Process protocol field 2. */
|
---|
| 1926 | pcrx->inProtocol |= curChar;
|
---|
| 1927 | pcrx->inState = PDDATA;
|
---|
| 1928 | break;
|
---|
| 1929 | case PDDATA: /* Process data byte. */
|
---|
| 1930 | /* Make space to receive processed data. */
|
---|
| 1931 | if (pcrx->inTail == NULL || pcrx->inTail->len == PBUF_POOL_BUFSIZE) {
|
---|
| 1932 | if (pcrx->inTail != NULL) {
|
---|
| 1933 | pcrx->inTail->tot_len = pcrx->inTail->len;
|
---|
| 1934 | if (pcrx->inTail != pcrx->inHead) {
|
---|
| 1935 | pbuf_cat(pcrx->inHead, pcrx->inTail);
|
---|
| 1936 | /* give up the inTail reference now */
|
---|
| 1937 | pcrx->inTail = NULL;
|
---|
| 1938 | }
|
---|
| 1939 | }
|
---|
| 1940 | /* If we haven't started a packet, we need a packet header. */
|
---|
| 1941 | nextNBuf = pbuf_alloc(PBUF_RAW, 0, PBUF_POOL);
|
---|
| 1942 | if (nextNBuf == NULL) {
|
---|
| 1943 | /* No free buffers. Drop the input packet and let the
|
---|
| 1944 | * higher layers deal with it. Continue processing
|
---|
| 1945 | * the received pbuf chain in case a new packet starts. */
|
---|
| 1946 | PPPDEBUG(LOG_ERR, ("pppInProc[%d]: NO FREE MBUFS!\n", pcrx->pd));
|
---|
| 1947 | LINK_STATS_INC(link.memerr);
|
---|
| 1948 | pppDrop(pcrx);
|
---|
| 1949 | pcrx->inState = PDSTART; /* Wait for flag sequence. */
|
---|
| 1950 | break;
|
---|
| 1951 | }
|
---|
| 1952 | if (pcrx->inHead == NULL) {
|
---|
| 1953 | struct pppInputHeader *pih = nextNBuf->payload;
|
---|
| 1954 |
|
---|
| 1955 | pih->unit = pcrx->pd;
|
---|
| 1956 | pih->proto = pcrx->inProtocol;
|
---|
| 1957 |
|
---|
| 1958 | nextNBuf->len += sizeof(*pih);
|
---|
| 1959 |
|
---|
| 1960 | pcrx->inHead = nextNBuf;
|
---|
| 1961 | }
|
---|
| 1962 | pcrx->inTail = nextNBuf;
|
---|
| 1963 | }
|
---|
| 1964 | /* Load character into buffer. */
|
---|
| 1965 | ((u_char*)pcrx->inTail->payload)[pcrx->inTail->len++] = curChar;
|
---|
| 1966 | break;
|
---|
| 1967 | }
|
---|
| 1968 |
|
---|
| 1969 | /* update the frame check sequence number. */
|
---|
| 1970 | pcrx->inFCS = PPP_FCS(pcrx->inFCS, curChar);
|
---|
| 1971 | }
|
---|
| 1972 | } /* while (l-- > 0), all bytes processed */
|
---|
| 1973 |
|
---|
| 1974 | avRandomize();
|
---|
| 1975 | }
|
---|
| 1976 | #endif /* PPPOS_SUPPORT */
|
---|
| 1977 |
|
---|
| 1978 | #if PPPOE_SUPPORT
|
---|
| 1979 | void
|
---|
| 1980 | pppInProcOverEthernet(int pd, struct pbuf *pb)
|
---|
| 1981 | {
|
---|
| 1982 | struct pppInputHeader *pih;
|
---|
| 1983 | u16_t inProtocol;
|
---|
| 1984 |
|
---|
| 1985 | if(pb->len < sizeof(inProtocol)) {
|
---|
| 1986 | PPPDEBUG(LOG_ERR, ("pppInProcOverEthernet: too small for protocol field\n"));
|
---|
| 1987 | goto drop;
|
---|
| 1988 | }
|
---|
| 1989 |
|
---|
| 1990 | inProtocol = (((u8_t *)pb->payload)[0] << 8) | ((u8_t*)pb->payload)[1];
|
---|
| 1991 |
|
---|
| 1992 | /* make room for pppInputHeader - should not fail */
|
---|
| 1993 | if (pbuf_header(pb, sizeof(*pih) - sizeof(inProtocol)) != 0) {
|
---|
| 1994 | PPPDEBUG(LOG_ERR, ("pppInProcOverEthernet: could not allocate room for header\n"));
|
---|
| 1995 | goto drop;
|
---|
| 1996 | }
|
---|
| 1997 |
|
---|
| 1998 | pih = pb->payload;
|
---|
| 1999 |
|
---|
| 2000 | pih->unit = pd;
|
---|
| 2001 | pih->proto = inProtocol;
|
---|
| 2002 |
|
---|
| 2003 | /* Dispatch the packet thereby consuming it. */
|
---|
| 2004 | pppInput(pb);
|
---|
| 2005 | return;
|
---|
| 2006 |
|
---|
| 2007 | drop:
|
---|
| 2008 | LINK_STATS_INC(link.drop);
|
---|
| 2009 | snmp_inc_ifindiscards(&pppControl[pd].netif);
|
---|
| 2010 | pbuf_free(pb);
|
---|
| 2011 | return;
|
---|
| 2012 | }
|
---|
| 2013 | #endif /* PPPOE_SUPPORT */
|
---|
| 2014 |
|
---|
| 2015 | #if LWIP_NETIF_STATUS_CALLBACK
|
---|
| 2016 | /** Set the status callback of a PPP's netif
|
---|
| 2017 | *
|
---|
| 2018 | * @param pd The PPP descriptor returned by pppOpen()
|
---|
| 2019 | * @param status_callback pointer to the status callback function
|
---|
| 2020 | *
|
---|
| 2021 | * @see netif_set_status_callback
|
---|
| 2022 | */
|
---|
| 2023 | void
|
---|
| 2024 | ppp_set_netif_statuscallback(int pd, netif_status_callback_fn status_callback)
|
---|
| 2025 | {
|
---|
| 2026 | netif_set_status_callback(&pppControl[pd].netif, status_callback);
|
---|
| 2027 | }
|
---|
| 2028 | #endif /* LWIP_NETIF_STATUS_CALLBACK */
|
---|
| 2029 |
|
---|
| 2030 | #if LWIP_NETIF_LINK_CALLBACK
|
---|
| 2031 | /** Set the link callback of a PPP's netif
|
---|
| 2032 | *
|
---|
| 2033 | * @param pd The PPP descriptor returned by pppOpen()
|
---|
| 2034 | * @param link_callback pointer to the link callback function
|
---|
| 2035 | *
|
---|
| 2036 | * @see netif_set_link_callback
|
---|
| 2037 | */
|
---|
| 2038 | void
|
---|
| 2039 | ppp_set_netif_linkcallback(int pd, netif_status_callback_fn link_callback)
|
---|
| 2040 | {
|
---|
| 2041 | netif_set_link_callback(&pppControl[pd].netif, link_callback);
|
---|
| 2042 | }
|
---|
| 2043 | #endif /* LWIP_NETIF_LINK_CALLBACK */
|
---|
| 2044 |
|
---|
| 2045 | #endif /* PPP_SUPPORT */
|
---|