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      1 /*
      2  * ecp.c - PPP Encryption Control Protocol.
      3  *
      4  * Copyright (c) 2002 Google, Inc.
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  *
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  *
     14  * 2. Redistributions in binary form must reproduce the above copyright
     15  *    notice, this list of conditions and the following disclaimer in
     16  *    the documentation and/or other materials provided with the
     17  *    distribution.
     18  *
     19  * 3. The name(s) of the authors of this software must not be used to
     20  *    endorse or promote products derived from this software without
     21  *    prior written permission.
     22  *
     23  * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO
     24  * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
     25  * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
     26  * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
     27  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
     28  * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
     29  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
     30  *
     31  * Derived from ccp.c, which is:
     32  *
     33  * Copyright (c) 1994-2002 Paul Mackerras. All rights reserved.
     34  *
     35  * Redistribution and use in source and binary forms, with or without
     36  * modification, are permitted provided that the following conditions
     37  * are met:
     38  *
     39  * 1. Redistributions of source code must retain the above copyright
     40  *    notice, this list of conditions and the following disclaimer.
     41  *
     42  * 2. The name(s) of the authors of this software must not be used to
     43  *    endorse or promote products derived from this software without
     44  *    prior written permission.
     45  *
     46  * 3. Redistributions of any form whatsoever must retain the following
     47  *    acknowledgment:
     48  *    "This product includes software developed by Paul Mackerras
     49  *     <paulus (at) samba.org>".
     50  *
     51  * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO
     52  * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
     53  * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
     54  * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
     55  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
     56  * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
     57  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
     58  */
     59 
     60 #define RCSID	"$Id: ecp.c,v 1.4 2004/11/04 10:02:26 paulus Exp $"
     61 
     62 static const char rcsid[] = RCSID;
     63 
     64 #include <string.h>
     65 
     66 #include "pppd.h"
     67 #include "fsm.h"
     68 #include "ecp.h"
     69 
     70 static option_t ecp_option_list[] = {
     71     { "noecp", o_bool, &ecp_protent.enabled_flag,
     72       "Disable ECP negotiation" },
     73     { "-ecp", o_bool, &ecp_protent.enabled_flag,
     74       "Disable ECP negotiation", OPT_ALIAS },
     75 
     76     { NULL }
     77 };
     78 
     79 /*
     80  * Protocol entry points from main code.
     81  */
     82 static void ecp_init __P((int unit));
     83 /*
     84 static void ecp_open __P((int unit));
     85 static void ecp_close __P((int unit, char *));
     86 static void ecp_lowerup __P((int unit));
     87 static void ecp_lowerdown __P((int));
     88 static void ecp_input __P((int unit, u_char *pkt, int len));
     89 static void ecp_protrej __P((int unit));
     90 */
     91 static int  ecp_printpkt __P((u_char *pkt, int len,
     92 			      void (*printer) __P((void *, char *, ...)),
     93 			      void *arg));
     94 /*
     95 static void ecp_datainput __P((int unit, u_char *pkt, int len));
     96 */
     97 
     98 struct protent ecp_protent = {
     99     PPP_ECP,
    100     ecp_init,
    101     NULL, /* ecp_input, */
    102     NULL, /* ecp_protrej, */
    103     NULL, /* ecp_lowerup, */
    104     NULL, /* ecp_lowerdown, */
    105     NULL, /* ecp_open, */
    106     NULL, /* ecp_close, */
    107     ecp_printpkt,
    108     NULL, /* ecp_datainput, */
    109     0,
    110     "ECP",
    111     "Encrypted",
    112     ecp_option_list,
    113     NULL,
    114     NULL,
    115     NULL
    116 };
    117 
    118 fsm ecp_fsm[NUM_PPP];
    119 ecp_options ecp_wantoptions[NUM_PPP];	/* what to request the peer to use */
    120 ecp_options ecp_gotoptions[NUM_PPP];	/* what the peer agreed to do */
    121 ecp_options ecp_allowoptions[NUM_PPP];	/* what we'll agree to do */
    122 ecp_options ecp_hisoptions[NUM_PPP];	/* what we agreed to do */
    123 
    124 static fsm_callbacks ecp_callbacks = {
    125     NULL, /* ecp_resetci, */
    126     NULL, /* ecp_cilen, */
    127     NULL, /* ecp_addci, */
    128     NULL, /* ecp_ackci, */
    129     NULL, /* ecp_nakci, */
    130     NULL, /* ecp_rejci, */
    131     NULL, /* ecp_reqci, */
    132     NULL, /* ecp_up, */
    133     NULL, /* ecp_down, */
    134     NULL,
    135     NULL,
    136     NULL,
    137     NULL,
    138     NULL, /* ecp_extcode, */
    139     "ECP"
    140 };
    141 
    142 /*
    143  * ecp_init - initialize ECP.
    144  */
    145 static void
    146 ecp_init(unit)
    147     int unit;
    148 {
    149     fsm *f = &ecp_fsm[unit];
    150 
    151     f->unit = unit;
    152     f->protocol = PPP_ECP;
    153     f->callbacks = &ecp_callbacks;
    154     fsm_init(f);
    155 
    156     memset(&ecp_wantoptions[unit],  0, sizeof(ecp_options));
    157     memset(&ecp_gotoptions[unit],   0, sizeof(ecp_options));
    158     memset(&ecp_allowoptions[unit], 0, sizeof(ecp_options));
    159     memset(&ecp_hisoptions[unit],   0, sizeof(ecp_options));
    160 
    161 }
    162 
    163 
    164 static int
    165 ecp_printpkt(p, plen, printer, arg)
    166     u_char *p;
    167     int plen;
    168     void (*printer) __P((void *, char *, ...));
    169     void *arg;
    170 {
    171     return 0;
    172 }
    173 
    174