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| mbed714 |
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/** In contrast to pppd 2.3.1, DNS support has been added, proxy-ARP and
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dial-on-demand has been stripped. */
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/*****************************************************************************
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* ipcp.c - Network PPP IP Control Protocol program file.
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*
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* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
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* portions Copyright (c) 1997 by Global Election Systems Inc.
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*
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* The authors hereby grant permission to use, copy, modify, distribute,
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* and license this software and its documentation for any purpose, provided
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* that existing copyright notices are retained in all copies and that this
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* notice and the following disclaimer are included verbatim in any
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* distributions. No written agreement, license, or royalty fee is required
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* for any of the authorized uses.
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*
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* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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******************************************************************************
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* REVISION HISTORY
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*
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* 03-01-01 Marc Boucher <marc@mbsi.ca>
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* Ported to lwIP.
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* 97-12-08 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
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* Original.
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*****************************************************************************/
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/*
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* ipcp.c - PPP IP Control Protocol.
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*
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* Copyright (c) 1989 Carnegie Mellon University.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that the above copyright notice and this paragraph are
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* duplicated in all such forms and that any documentation,
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* advertising materials, and other materials related to such
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* distribution and use acknowledge that the software was developed
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* by Carnegie Mellon University. The name of the
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* University may not be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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#include "lwip/opt.h"
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#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
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#include "ppp.h"
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#include "pppdebug.h"
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#include "auth.h"
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#include "fsm.h"
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#include "vj.h"
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#include "ipcp.h"
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#include "lwip/inet.h"
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#include <string.h>
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/* #define OLD_CI_ADDRS 1 */ /* Support deprecated address negotiation. */
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/* global vars */
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ipcp_options ipcp_wantoptions[NUM_PPP]; /* Options that we want to request */
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ipcp_options ipcp_gotoptions[NUM_PPP]; /* Options that peer ack'd */
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ipcp_options ipcp_allowoptions[NUM_PPP]; /* Options we allow peer to request */
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ipcp_options ipcp_hisoptions[NUM_PPP]; /* Options that we ack'd */
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/* local vars */
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static int default_route_set[NUM_PPP]; /* Have set up a default route */
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static int cis_received[NUM_PPP]; /* # Conf-Reqs received */
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/*
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* Callbacks for fsm code. (CI = Configuration Information)
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*/
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static void ipcp_resetci (fsm *); /* Reset our CI */
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static int ipcp_cilen (fsm *); /* Return length of our CI */
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static void ipcp_addci (fsm *, u_char *, int *); /* Add our CI */
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static int ipcp_ackci (fsm *, u_char *, int); /* Peer ack'd our CI */
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static int ipcp_nakci (fsm *, u_char *, int); /* Peer nak'd our CI */
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static int ipcp_rejci (fsm *, u_char *, int); /* Peer rej'd our CI */
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static int ipcp_reqci (fsm *, u_char *, int *, int); /* Rcv CI */
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static void ipcp_up (fsm *); /* We're UP */
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static void ipcp_down (fsm *); /* We're DOWN */
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#if PPP_ADDITIONAL_CALLBACKS
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static void ipcp_script (fsm *, char *); /* Run an up/down script */
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#endif
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static void ipcp_finished (fsm *); /* Don't need lower layer */
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fsm ipcp_fsm[NUM_PPP]; /* IPCP fsm structure */
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static fsm_callbacks ipcp_callbacks = { /* IPCP callback routines */
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ipcp_resetci, /* Reset our Configuration Information */
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ipcp_cilen, /* Length of our Configuration Information */
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ipcp_addci, /* Add our Configuration Information */
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ipcp_ackci, /* ACK our Configuration Information */
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ipcp_nakci, /* NAK our Configuration Information */
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ipcp_rejci, /* Reject our Configuration Information */
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ipcp_reqci, /* Request peer's Configuration Information */
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ipcp_up, /* Called when fsm reaches LS_OPENED state */
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ipcp_down, /* Called when fsm leaves LS_OPENED state */
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NULL, /* Called when we want the lower layer up */
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ipcp_finished, /* Called when we want the lower layer down */
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NULL, /* Called when Protocol-Reject received */
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NULL, /* Retransmission is necessary */
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NULL, /* Called to handle protocol-specific codes */
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"IPCP" /* String name of protocol */
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};
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/*
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* Protocol entry points from main code.
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*/
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static void ipcp_init (int);
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static void ipcp_open (int);
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static void ipcp_close (int, char *);
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static void ipcp_lowerup (int);
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static void ipcp_lowerdown (int);
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static void ipcp_input (int, u_char *, int);
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static void ipcp_protrej (int);
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struct protent ipcp_protent = {
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PPP_IPCP,
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ipcp_init,
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ipcp_input,
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ipcp_protrej,
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ipcp_lowerup,
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ipcp_lowerdown,
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ipcp_open,
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ipcp_close,
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#if PPP_ADDITIONAL_CALLBACKS
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ipcp_printpkt,
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NULL,
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#endif /* PPP_ADDITIONAL_CALLBACKS */
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1,
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"IPCP",
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#if PPP_ADDITIONAL_CALLBACKS
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ip_check_options,
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NULL,
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ip_active_pkt
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#endif /* PPP_ADDITIONAL_CALLBACKS */
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};
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static void ipcp_clear_addrs (int);
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157
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/*
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159
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* Lengths of configuration options.
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*/
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#define CILEN_VOID 2
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#define CILEN_COMPRESS 4 /* min length for compression protocol opt. */
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#define CILEN_VJ 6 /* length for RFC1332 Van-Jacobson opt. */
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#define CILEN_ADDR 6 /* new-style single address option */
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#define CILEN_ADDRS 10 /* old-style dual address option */
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#define CODENAME(x) ((x) == CONFACK ? "ACK" : \
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(x) == CONFNAK ? "NAK" : "REJ")
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/*
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* ipcp_init - Initialize IPCP.
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*/
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static void
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ipcp_init(int unit)
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{
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fsm *f = &ipcp_fsm[unit];
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ipcp_options *wo = &ipcp_wantoptions[unit];
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ipcp_options *ao = &ipcp_allowoptions[unit];
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f->unit = unit;
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f->protocol = PPP_IPCP;
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f->callbacks = &ipcp_callbacks;
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fsm_init(&ipcp_fsm[unit]);
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186
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memset(wo, 0, sizeof(*wo));
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memset(ao, 0, sizeof(*ao));
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wo->neg_addr = 1;
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191
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wo->ouraddr = 0;
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#if VJ_SUPPORT
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wo->neg_vj = 1;
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#else /* VJ_SUPPORT */
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wo->neg_vj = 0;
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#endif /* VJ_SUPPORT */
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wo->vj_protocol = IPCP_VJ_COMP;
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wo->maxslotindex = MAX_SLOTS - 1;
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wo->cflag = 0;
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200
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wo->default_route = 1;
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201
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202
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ao->neg_addr = 1;
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203
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#if VJ_SUPPORT
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204
|
ao->neg_vj = 1;
|
| mbed714 |
0:d616ece2d859
|
205
|
#else /* VJ_SUPPORT */
|
| mbed714 |
0:d616ece2d859
|
206
|
ao->neg_vj = 0;
|
| mbed714 |
0:d616ece2d859
|
207
|
#endif /* VJ_SUPPORT */
|
| mbed714 |
0:d616ece2d859
|
208
|
ao->maxslotindex = MAX_SLOTS - 1;
|
| mbed714 |
0:d616ece2d859
|
209
|
ao->cflag = 1;
|
| mbed714 |
0:d616ece2d859
|
210
|
ao->default_route = 1;
|
| mbed714 |
0:d616ece2d859
|
211
|
}
|
| mbed714 |
0:d616ece2d859
|
212
|
|
| mbed714 |
0:d616ece2d859
|
213
|
|
| mbed714 |
0:d616ece2d859
|
214
|
/*
|
| mbed714 |
0:d616ece2d859
|
215
|
* ipcp_open - IPCP is allowed to come up.
|
| mbed714 |
0:d616ece2d859
|
216
|
*/
|
| mbed714 |
0:d616ece2d859
|
217
|
static void
|
| mbed714 |
0:d616ece2d859
|
218
|
ipcp_open(int unit)
|
| mbed714 |
0:d616ece2d859
|
219
|
{
|
| mbed714 |
0:d616ece2d859
|
220
|
fsm_open(&ipcp_fsm[unit]);
|
| mbed714 |
0:d616ece2d859
|
221
|
}
|
| mbed714 |
0:d616ece2d859
|
222
|
|
| mbed714 |
0:d616ece2d859
|
223
|
|
| mbed714 |
0:d616ece2d859
|
224
|
/*
|
| mbed714 |
0:d616ece2d859
|
225
|
* ipcp_close - Take IPCP down.
|
| mbed714 |
0:d616ece2d859
|
226
|
*/
|
| mbed714 |
0:d616ece2d859
|
227
|
static void
|
| mbed714 |
0:d616ece2d859
|
228
|
ipcp_close(int unit, char *reason)
|
| mbed714 |
0:d616ece2d859
|
229
|
{
|
| mbed714 |
0:d616ece2d859
|
230
|
fsm_close(&ipcp_fsm[unit], reason);
|
| mbed714 |
0:d616ece2d859
|
231
|
}
|
| mbed714 |
0:d616ece2d859
|
232
|
|
| mbed714 |
0:d616ece2d859
|
233
|
|
| mbed714 |
0:d616ece2d859
|
234
|
/*
|
| mbed714 |
0:d616ece2d859
|
235
|
* ipcp_lowerup - The lower layer is up.
|
| mbed714 |
0:d616ece2d859
|
236
|
*/
|
| mbed714 |
0:d616ece2d859
|
237
|
static void
|
| mbed714 |
0:d616ece2d859
|
238
|
ipcp_lowerup(int unit)
|
| mbed714 |
0:d616ece2d859
|
239
|
{
|
| mbed714 |
0:d616ece2d859
|
240
|
fsm_lowerup(&ipcp_fsm[unit]);
|
| mbed714 |
0:d616ece2d859
|
241
|
}
|
| mbed714 |
0:d616ece2d859
|
242
|
|
| mbed714 |
0:d616ece2d859
|
243
|
|
| mbed714 |
0:d616ece2d859
|
244
|
/*
|
| mbed714 |
0:d616ece2d859
|
245
|
* ipcp_lowerdown - The lower layer is down.
|
| mbed714 |
0:d616ece2d859
|
246
|
*/
|
| mbed714 |
0:d616ece2d859
|
247
|
static void
|
| mbed714 |
0:d616ece2d859
|
248
|
ipcp_lowerdown(int unit)
|
| mbed714 |
0:d616ece2d859
|
249
|
{
|
| mbed714 |
0:d616ece2d859
|
250
|
fsm_lowerdown(&ipcp_fsm[unit]);
|
| mbed714 |
0:d616ece2d859
|
251
|
}
|
| mbed714 |
0:d616ece2d859
|
252
|
|
| mbed714 |
0:d616ece2d859
|
253
|
|
| mbed714 |
0:d616ece2d859
|
254
|
/*
|
| mbed714 |
0:d616ece2d859
|
255
|
* ipcp_input - Input IPCP packet.
|
| mbed714 |
0:d616ece2d859
|
256
|
*/
|
| mbed714 |
0:d616ece2d859
|
257
|
static void
|
| mbed714 |
0:d616ece2d859
|
258
|
ipcp_input(int unit, u_char *p, int len)
|
| mbed714 |
0:d616ece2d859
|
259
|
{
|
| mbed714 |
0:d616ece2d859
|
260
|
fsm_input(&ipcp_fsm[unit], p, len);
|
| mbed714 |
0:d616ece2d859
|
261
|
}
|
| mbed714 |
0:d616ece2d859
|
262
|
|
| mbed714 |
0:d616ece2d859
|
263
|
|
| mbed714 |
0:d616ece2d859
|
264
|
/*
|
| mbed714 |
0:d616ece2d859
|
265
|
* ipcp_protrej - A Protocol-Reject was received for IPCP.
|
| mbed714 |
0:d616ece2d859
|
266
|
*
|
| mbed714 |
0:d616ece2d859
|
267
|
* Pretend the lower layer went down, so we shut up.
|
| mbed714 |
0:d616ece2d859
|
268
|
*/
|
| mbed714 |
0:d616ece2d859
|
269
|
static void
|
| mbed714 |
0:d616ece2d859
|
270
|
ipcp_protrej(int unit)
|
| mbed714 |
0:d616ece2d859
|
271
|
{
|
| mbed714 |
0:d616ece2d859
|
272
|
fsm_lowerdown(&ipcp_fsm[unit]);
|
| mbed714 |
0:d616ece2d859
|
273
|
}
|
| mbed714 |
0:d616ece2d859
|
274
|
|
| mbed714 |
0:d616ece2d859
|
275
|
|
| mbed714 |
0:d616ece2d859
|
276
|
/*
|
| mbed714 |
0:d616ece2d859
|
277
|
* ipcp_resetci - Reset our CI.
|
| mbed714 |
0:d616ece2d859
|
278
|
*/
|
| mbed714 |
0:d616ece2d859
|
279
|
static void
|
| mbed714 |
0:d616ece2d859
|
280
|
ipcp_resetci(fsm *f)
|
| mbed714 |
0:d616ece2d859
|
281
|
{
|
| mbed714 |
0:d616ece2d859
|
282
|
ipcp_options *wo = &ipcp_wantoptions[f->unit];
|
| mbed714 |
0:d616ece2d859
|
283
|
|
| mbed714 |
0:d616ece2d859
|
284
|
wo->req_addr = wo->neg_addr && ipcp_allowoptions[f->unit].neg_addr;
|
| mbed714 |
0:d616ece2d859
|
285
|
if (wo->ouraddr == 0) {
|
| mbed714 |
0:d616ece2d859
|
286
|
wo->accept_local = 1;
|
| mbed714 |
0:d616ece2d859
|
287
|
}
|
| mbed714 |
0:d616ece2d859
|
288
|
if (wo->hisaddr == 0) {
|
| mbed714 |
0:d616ece2d859
|
289
|
wo->accept_remote = 1;
|
| mbed714 |
0:d616ece2d859
|
290
|
}
|
| mbed714 |
0:d616ece2d859
|
291
|
/* Request DNS addresses from the peer */
|
| mbed714 |
0:d616ece2d859
|
292
|
wo->req_dns1 = ppp_settings.usepeerdns;
|
| mbed714 |
0:d616ece2d859
|
293
|
wo->req_dns2 = ppp_settings.usepeerdns;
|
| mbed714 |
0:d616ece2d859
|
294
|
ipcp_gotoptions[f->unit] = *wo;
|
| mbed714 |
0:d616ece2d859
|
295
|
cis_received[f->unit] = 0;
|
| mbed714 |
0:d616ece2d859
|
296
|
}
|
| mbed714 |
0:d616ece2d859
|
297
|
|
| mbed714 |
0:d616ece2d859
|
298
|
|
| mbed714 |
0:d616ece2d859
|
299
|
/*
|
| mbed714 |
0:d616ece2d859
|
300
|
* ipcp_cilen - Return length of our CI.
|
| mbed714 |
0:d616ece2d859
|
301
|
*/
|
| mbed714 |
0:d616ece2d859
|
302
|
static int
|
| mbed714 |
0:d616ece2d859
|
303
|
ipcp_cilen(fsm *f)
|
| mbed714 |
0:d616ece2d859
|
304
|
{
|
| mbed714 |
0:d616ece2d859
|
305
|
ipcp_options *go = &ipcp_gotoptions[f->unit];
|
| mbed714 |
0:d616ece2d859
|
306
|
ipcp_options *wo = &ipcp_wantoptions[f->unit];
|
| mbed714 |
0:d616ece2d859
|
307
|
ipcp_options *ho = &ipcp_hisoptions[f->unit];
|
| mbed714 |
0:d616ece2d859
|
308
|
|
| mbed714 |
0:d616ece2d859
|
309
|
#define LENCIVJ(neg, old) (neg ? (old? CILEN_COMPRESS : CILEN_VJ) : 0)
|
| mbed714 |
0:d616ece2d859
|
310
|
#define LENCIADDR(neg, old) (neg ? (old? CILEN_ADDRS : CILEN_ADDR) : 0)
|
| mbed714 |
0:d616ece2d859
|
311
|
#define LENCIDNS(neg) (neg ? (CILEN_ADDR) : 0)
|
| mbed714 |
0:d616ece2d859
|
312
|
|
| mbed714 |
0:d616ece2d859
|
313
|
/*
|
| mbed714 |
0:d616ece2d859
|
314
|
* First see if we want to change our options to the old
|
| mbed714 |
0:d616ece2d859
|
315
|
* forms because we have received old forms from the peer.
|
| mbed714 |
0:d616ece2d859
|
316
|
*/
|
| mbed714 |
0:d616ece2d859
|
317
|
if (wo->neg_addr && !go->neg_addr && !go->old_addrs) {
|
| mbed714 |
0:d616ece2d859
|
318
|
/* use the old style of address negotiation */
|
| mbed714 |
0:d616ece2d859
|
319
|
go->neg_addr = 1;
|
| mbed714 |
0:d616ece2d859
|
320
|
go->old_addrs = 1;
|
| mbed714 |
0:d616ece2d859
|
321
|
}
|
| mbed714 |
0:d616ece2d859
|
322
|
if (wo->neg_vj && !go->neg_vj && !go->old_vj) {
|
| mbed714 |
0:d616ece2d859
|
323
|
/* try an older style of VJ negotiation */
|
| mbed714 |
0:d616ece2d859
|
324
|
if (cis_received[f->unit] == 0) {
|
| mbed714 |
0:d616ece2d859
|
325
|
/* keep trying the new style until we see some CI from the peer */
|
| mbed714 |
0:d616ece2d859
|
326
|
go->neg_vj = 1;
|
| mbed714 |
0:d616ece2d859
|
327
|
} else {
|
| mbed714 |
0:d616ece2d859
|
328
|
/* use the old style only if the peer did */
|
| mbed714 |
0:d616ece2d859
|
329
|
if (ho->neg_vj && ho->old_vj) {
|
| mbed714 |
0:d616ece2d859
|
330
|
go->neg_vj = 1;
|
| mbed714 |
0:d616ece2d859
|
331
|
go->old_vj = 1;
|
| mbed714 |
0:d616ece2d859
|
332
|
go->vj_protocol = ho->vj_protocol;
|
| mbed714 |
0:d616ece2d859
|
333
|
}
|
| mbed714 |
0:d616ece2d859
|
334
|
}
|
| mbed714 |
0:d616ece2d859
|
335
|
}
|
| mbed714 |
0:d616ece2d859
|
336
|
|
| mbed714 |
0:d616ece2d859
|
337
|
return (LENCIADDR(go->neg_addr, go->old_addrs) +
|
| mbed714 |
0:d616ece2d859
|
338
|
LENCIVJ(go->neg_vj, go->old_vj) +
|
| mbed714 |
0:d616ece2d859
|
339
|
LENCIDNS(go->req_dns1) +
|
| mbed714 |
0:d616ece2d859
|
340
|
LENCIDNS(go->req_dns2));
|
| mbed714 |
0:d616ece2d859
|
341
|
}
|
| mbed714 |
0:d616ece2d859
|
342
|
|
| mbed714 |
0:d616ece2d859
|
343
|
|
| mbed714 |
0:d616ece2d859
|
344
|
/*
|
| mbed714 |
0:d616ece2d859
|
345
|
* ipcp_addci - Add our desired CIs to a packet.
|
| mbed714 |
0:d616ece2d859
|
346
|
*/
|
| mbed714 |
0:d616ece2d859
|
347
|
static void
|
| mbed714 |
0:d616ece2d859
|
348
|
ipcp_addci(fsm *f, u_char *ucp, int *lenp)
|
| mbed714 |
0:d616ece2d859
|
349
|
{
|
| mbed714 |
0:d616ece2d859
|
350
|
ipcp_options *go = &ipcp_gotoptions[f->unit];
|
| mbed714 |
0:d616ece2d859
|
351
|
int len = *lenp;
|
| mbed714 |
0:d616ece2d859
|
352
|
|
| mbed714 |
0:d616ece2d859
|
353
|
#define ADDCIVJ(opt, neg, val, old, maxslotindex, cflag) \
|
| mbed714 |
0:d616ece2d859
|
354
|
if (neg) { \
|
| mbed714 |
0:d616ece2d859
|
355
|
int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \
|
| mbed714 |
0:d616ece2d859
|
356
|
if (len >= vjlen) { \
|
| mbed714 |
0:d616ece2d859
|
357
|
PUTCHAR(opt, ucp); \
|
| mbed714 |
0:d616ece2d859
|
358
|
PUTCHAR(vjlen, ucp); \
|
| mbed714 |
0:d616ece2d859
|
359
|
PUTSHORT(val, ucp); \
|
| mbed714 |
0:d616ece2d859
|
360
|
if (!old) { \
|
| mbed714 |
0:d616ece2d859
|
361
|
PUTCHAR(maxslotindex, ucp); \
|
| mbed714 |
0:d616ece2d859
|
362
|
PUTCHAR(cflag, ucp); \
|
| mbed714 |
0:d616ece2d859
|
363
|
} \
|
| mbed714 |
0:d616ece2d859
|
364
|
len -= vjlen; \
|
| mbed714 |
0:d616ece2d859
|
365
|
} else { \
|
| mbed714 |
0:d616ece2d859
|
366
|
neg = 0; \
|
| mbed714 |
0:d616ece2d859
|
367
|
} \
|
| mbed714 |
0:d616ece2d859
|
368
|
}
|
| mbed714 |
0:d616ece2d859
|
369
|
|
| mbed714 |
0:d616ece2d859
|
370
|
#define ADDCIADDR(opt, neg, old, val1, val2) \
|
| mbed714 |
0:d616ece2d859
|
371
|
if (neg) { \
|
| mbed714 |
0:d616ece2d859
|
372
|
int addrlen = (old? CILEN_ADDRS: CILEN_ADDR); \
|
| mbed714 |
0:d616ece2d859
|
373
|
if (len >= addrlen) { \
|
| mbed714 |
0:d616ece2d859
|
374
|
u32_t l; \
|
| mbed714 |
0:d616ece2d859
|
375
|
PUTCHAR(opt, ucp); \
|
| mbed714 |
0:d616ece2d859
|
376
|
PUTCHAR(addrlen, ucp); \
|
| mbed714 |
0:d616ece2d859
|
377
|
l = ntohl(val1); \
|
| mbed714 |
0:d616ece2d859
|
378
|
PUTLONG(l, ucp); \
|
| mbed714 |
0:d616ece2d859
|
379
|
if (old) { \
|
| mbed714 |
0:d616ece2d859
|
380
|
l = ntohl(val2); \
|
| mbed714 |
0:d616ece2d859
|
381
|
PUTLONG(l, ucp); \
|
| mbed714 |
0:d616ece2d859
|
382
|
} \
|
| mbed714 |
0:d616ece2d859
|
383
|
len -= addrlen; \
|
| mbed714 |
0:d616ece2d859
|
384
|
} else { \
|
| mbed714 |
0:d616ece2d859
|
385
|
neg = 0; \
|
| mbed714 |
0:d616ece2d859
|
386
|
} \
|
| mbed714 |
0:d616ece2d859
|
387
|
}
|
| mbed714 |
0:d616ece2d859
|
388
|
|
| mbed714 |
0:d616ece2d859
|
389
|
#define ADDCIDNS(opt, neg, addr) \
|
| mbed714 |
0:d616ece2d859
|
390
|
if (neg) { \
|
| mbed714 |
0:d616ece2d859
|
391
|
if (len >= CILEN_ADDR) { \
|
| mbed714 |
0:d616ece2d859
|
392
|
u32_t l; \
|
| mbed714 |
0:d616ece2d859
|
393
|
PUTCHAR(opt, ucp); \
|
| mbed714 |
0:d616ece2d859
|
394
|
PUTCHAR(CILEN_ADDR, ucp); \
|
| mbed714 |
0:d616ece2d859
|
395
|
l = ntohl(addr); \
|
| mbed714 |
0:d616ece2d859
|
396
|
PUTLONG(l, ucp); \
|
| mbed714 |
0:d616ece2d859
|
397
|
len -= CILEN_ADDR; \
|
| mbed714 |
0:d616ece2d859
|
398
|
} else { \
|
| mbed714 |
0:d616ece2d859
|
399
|
neg = 0; \
|
| mbed714 |
0:d616ece2d859
|
400
|
} \
|
| mbed714 |
0:d616ece2d859
|
401
|
}
|
| mbed714 |
0:d616ece2d859
|
402
|
|
| mbed714 |
0:d616ece2d859
|
403
|
ADDCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), go->neg_addr,
|
| mbed714 |
0:d616ece2d859
|
404
|
go->old_addrs, go->ouraddr, go->hisaddr);
|
| mbed714 |
0:d616ece2d859
|
405
|
|
| mbed714 |
0:d616ece2d859
|
406
|
ADDCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj,
|
| mbed714 |
0:d616ece2d859
|
407
|
go->maxslotindex, go->cflag);
|
| mbed714 |
0:d616ece2d859
|
408
|
|
| mbed714 |
0:d616ece2d859
|
409
|
ADDCIDNS(CI_MS_DNS1, go->req_dns1, go->dnsaddr[0]);
|
| mbed714 |
0:d616ece2d859
|
410
|
|
| mbed714 |
0:d616ece2d859
|
411
|
ADDCIDNS(CI_MS_DNS2, go->req_dns2, go->dnsaddr[1]);
|
| mbed714 |
0:d616ece2d859
|
412
|
|
| mbed714 |
0:d616ece2d859
|
413
|
*lenp -= len;
|
| mbed714 |
0:d616ece2d859
|
414
|
}
|
| mbed714 |
0:d616ece2d859
|
415
|
|
| mbed714 |
0:d616ece2d859
|
416
|
|
| mbed714 |
0:d616ece2d859
|
417
|
/*
|
| mbed714 |
0:d616ece2d859
|
418
|
* ipcp_ackci - Ack our CIs.
|
| mbed714 |
0:d616ece2d859
|
419
|
*
|
| mbed714 |
0:d616ece2d859
|
420
|
* Returns:
|
| mbed714 |
0:d616ece2d859
|
421
|
* 0 - Ack was bad.
|
| mbed714 |
0:d616ece2d859
|
422
|
* 1 - Ack was good.
|
| mbed714 |
0:d616ece2d859
|
423
|
*/
|
| mbed714 |
0:d616ece2d859
|
424
|
static int
|
| mbed714 |
0:d616ece2d859
|
425
|
ipcp_ackci(fsm *f, u_char *p, int len)
|
| mbed714 |
0:d616ece2d859
|
426
|
{
|
| mbed714 |
0:d616ece2d859
|
427
|
ipcp_options *go = &ipcp_gotoptions[f->unit];
|
| mbed714 |
0:d616ece2d859
|
428
|
u_short cilen, citype, cishort;
|
| mbed714 |
0:d616ece2d859
|
429
|
u32_t cilong;
|
| mbed714 |
0:d616ece2d859
|
430
|
u_char cimaxslotindex, cicflag;
|
| mbed714 |
0:d616ece2d859
|
431
|
|
| mbed714 |
0:d616ece2d859
|
432
|
/*
|
| mbed714 |
0:d616ece2d859
|
433
|
* CIs must be in exactly the same order that we sent...
|
| mbed714 |
0:d616ece2d859
|
434
|
* Check packet length and CI length at each step.
|
| mbed714 |
0:d616ece2d859
|
435
|
* If we find any deviations, then this packet is bad.
|
| mbed714 |
0:d616ece2d859
|
436
|
*/
|
| mbed714 |
0:d616ece2d859
|
437
|
|
| mbed714 |
0:d616ece2d859
|
438
|
#define ACKCIVJ(opt, neg, val, old, maxslotindex, cflag) \
|
| mbed714 |
0:d616ece2d859
|
439
|
if (neg) { \
|
| mbed714 |
0:d616ece2d859
|
440
|
int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \
|
| mbed714 |
0:d616ece2d859
|
441
|
if ((len -= vjlen) < 0) { \
|
| mbed714 |
0:d616ece2d859
|
442
|
goto bad; \
|
| mbed714 |
0:d616ece2d859
|
443
|
} \
|
| mbed714 |
0:d616ece2d859
|
444
|
GETCHAR(citype, p); \
|
| mbed714 |
0:d616ece2d859
|
445
|
GETCHAR(cilen, p); \
|
| mbed714 |
0:d616ece2d859
|
446
|
if (cilen != vjlen || \
|
| mbed714 |
0:d616ece2d859
|
447
|
citype != opt) { \
|
| mbed714 |
0:d616ece2d859
|
448
|
goto bad; \
|
| mbed714 |
0:d616ece2d859
|
449
|
} \
|
| mbed714 |
0:d616ece2d859
|
450
|
GETSHORT(cishort, p); \
|
| mbed714 |
0:d616ece2d859
|
451
|
if (cishort != val) { \
|
| mbed714 |
0:d616ece2d859
|
452
|
goto bad; \
|
| mbed714 |
0:d616ece2d859
|
453
|
} \
|
| mbed714 |
0:d616ece2d859
|
454
|
if (!old) { \
|
| mbed714 |
0:d616ece2d859
|
455
|
GETCHAR(cimaxslotindex, p); \
|
| mbed714 |
0:d616ece2d859
|
456
|
if (cimaxslotindex != maxslotindex) { \
|
| mbed714 |
0:d616ece2d859
|
457
|
goto bad; \
|
| mbed714 |
0:d616ece2d859
|
458
|
} \
|
| mbed714 |
0:d616ece2d859
|
459
|
GETCHAR(cicflag, p); \
|
| mbed714 |
0:d616ece2d859
|
460
|
if (cicflag != cflag) { \
|
| mbed714 |
0:d616ece2d859
|
461
|
goto bad; \
|
| mbed714 |
0:d616ece2d859
|
462
|
} \
|
| mbed714 |
0:d616ece2d859
|
463
|
} \
|
| mbed714 |
0:d616ece2d859
|
464
|
}
|
| mbed714 |
0:d616ece2d859
|
465
|
|
| mbed714 |
0:d616ece2d859
|
466
|
#define ACKCIADDR(opt, neg, old, val1, val2) \
|
| mbed714 |
0:d616ece2d859
|
467
|
if (neg) { \
|
| mbed714 |
0:d616ece2d859
|
468
|
int addrlen = (old? CILEN_ADDRS: CILEN_ADDR); \
|
| mbed714 |
0:d616ece2d859
|
469
|
u32_t l; \
|
| mbed714 |
0:d616ece2d859
|
470
|
if ((len -= addrlen) < 0) { \
|
| mbed714 |
0:d616ece2d859
|
471
|
goto bad; \
|
| mbed714 |
0:d616ece2d859
|
472
|
} \
|
| mbed714 |
0:d616ece2d859
|
473
|
GETCHAR(citype, p); \
|
| mbed714 |
0:d616ece2d859
|
474
|
GETCHAR(cilen, p); \
|
| mbed714 |
0:d616ece2d859
|
475
|
if (cilen != addrlen || \
|
| mbed714 |
0:d616ece2d859
|
476
|
citype != opt) { \
|
| mbed714 |
0:d616ece2d859
|
477
|
goto bad; \
|
| mbed714 |
0:d616ece2d859
|
478
|
} \
|
| mbed714 |
0:d616ece2d859
|
479
|
GETLONG(l, p); \
|
| mbed714 |
0:d616ece2d859
|
480
|
cilong = htonl(l); \
|
| mbed714 |
0:d616ece2d859
|
481
|
if (val1 != cilong) { \
|
| mbed714 |
0:d616ece2d859
|
482
|
goto bad; \
|
| mbed714 |
0:d616ece2d859
|
483
|
} \
|
| mbed714 |
0:d616ece2d859
|
484
|
if (old) { \
|
| mbed714 |
0:d616ece2d859
|
485
|
GETLONG(l, p); \
|
| mbed714 |
0:d616ece2d859
|
486
|
cilong = htonl(l); \
|
| mbed714 |
0:d616ece2d859
|
487
|
if (val2 != cilong) { \
|
| mbed714 |
0:d616ece2d859
|
488
|
goto bad; \
|
| mbed714 |
0:d616ece2d859
|
489
|
} \
|
| mbed714 |
0:d616ece2d859
|
490
|
} \
|
| mbed714 |
0:d616ece2d859
|
491
|
}
|
| mbed714 |
0:d616ece2d859
|
492
|
|
| mbed714 |
0:d616ece2d859
|
493
|
#define ACKCIDNS(opt, neg, addr) \
|
| mbed714 |
0:d616ece2d859
|
494
|
if (neg) { \
|
| mbed714 |
0:d616ece2d859
|
495
|
u32_t l; \
|
| mbed714 |
0:d616ece2d859
|
496
|
if ((len -= CILEN_ADDR) < 0) { \
|
| mbed714 |
0:d616ece2d859
|
497
|
goto bad; \
|
| mbed714 |
0:d616ece2d859
|
498
|
} \
|
| mbed714 |
0:d616ece2d859
|
499
|
GETCHAR(citype, p); \
|
| mbed714 |
0:d616ece2d859
|
500
|
GETCHAR(cilen, p); \
|
| mbed714 |
0:d616ece2d859
|
501
|
if (cilen != CILEN_ADDR || \
|
| mbed714 |
0:d616ece2d859
|
502
|
citype != opt) { \
|
| mbed714 |
0:d616ece2d859
|
503
|
goto bad; \
|
| mbed714 |
0:d616ece2d859
|
504
|
} \
|
| mbed714 |
0:d616ece2d859
|
505
|
GETLONG(l, p); \
|
| mbed714 |
0:d616ece2d859
|
506
|
cilong = htonl(l); \
|
| mbed714 |
0:d616ece2d859
|
507
|
if (addr != cilong) { \
|
| mbed714 |
0:d616ece2d859
|
508
|
goto bad; \
|
| mbed714 |
0:d616ece2d859
|
509
|
} \
|
| mbed714 |
0:d616ece2d859
|
510
|
}
|
| mbed714 |
0:d616ece2d859
|
511
|
|
| mbed714 |
0:d616ece2d859
|
512
|
ACKCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), go->neg_addr,
|
| mbed714 |
0:d616ece2d859
|
513
|
go->old_addrs, go->ouraddr, go->hisaddr);
|
| mbed714 |
0:d616ece2d859
|
514
|
|
| mbed714 |
0:d616ece2d859
|
515
|
ACKCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj,
|
| mbed714 |
0:d616ece2d859
|
516
|
go->maxslotindex, go->cflag);
|
| mbed714 |
0:d616ece2d859
|
517
|
|
| mbed714 |
0:d616ece2d859
|
518
|
ACKCIDNS(CI_MS_DNS1, go->req_dns1, go->dnsaddr[0]);
|
| mbed714 |
0:d616ece2d859
|
519
|
|
| mbed714 |
0:d616ece2d859
|
520
|
ACKCIDNS(CI_MS_DNS2, go->req_dns2, go->dnsaddr[1]);
|
| mbed714 |
0:d616ece2d859
|
521
|
|
| mbed714 |
0:d616ece2d859
|
522
|
/*
|
| mbed714 |
0:d616ece2d859
|
523
|
* If there are any remaining CIs, then this packet is bad.
|
| mbed714 |
0:d616ece2d859
|
524
|
*/
|
| mbed714 |
0:d616ece2d859
|
525
|
if (len != 0) {
|
| mbed714 |
0:d616ece2d859
|
526
|
goto bad;
|
| mbed714 |
0:d616ece2d859
|
527
|
}
|
| mbed714 |
0:d616ece2d859
|
528
|
return (1);
|
| mbed714 |
0:d616ece2d859
|
529
|
|
| mbed714 |
0:d616ece2d859
|
530
|
bad:
|
| mbed714 |
0:d616ece2d859
|
531
|
IPCPDEBUG(LOG_INFO, ("ipcp_ackci: received bad Ack!\n"));
|
| mbed714 |
0:d616ece2d859
|
532
|
return (0);
|
| mbed714 |
0:d616ece2d859
|
533
|
}
|
| mbed714 |
0:d616ece2d859
|
534
|
|
| mbed714 |
0:d616ece2d859
|
535
|
/*
|
| mbed714 |
0:d616ece2d859
|
536
|
* ipcp_nakci - Peer has sent a NAK for some of our CIs.
|
| mbed714 |
0:d616ece2d859
|
537
|
* This should not modify any state if the Nak is bad
|
| mbed714 |
0:d616ece2d859
|
538
|
* or if IPCP is in the LS_OPENED state.
|
| mbed714 |
0:d616ece2d859
|
539
|
*
|
| mbed714 |
0:d616ece2d859
|
540
|
* Returns:
|
| mbed714 |
0:d616ece2d859
|
541
|
* 0 - Nak was bad.
|
| mbed714 |
0:d616ece2d859
|
542
|
* 1 - Nak was good.
|
| mbed714 |
0:d616ece2d859
|
543
|
*/
|
| mbed714 |
0:d616ece2d859
|
544
|
static int
|
| mbed714 |
0:d616ece2d859
|
545
|
ipcp_nakci(fsm *f, u_char *p, int len)
|
| mbed714 |
0:d616ece2d859
|
546
|
{
|
| mbed714 |
0:d616ece2d859
|
547
|
ipcp_options *go = &ipcp_gotoptions[f->unit];
|
| mbed714 |
0:d616ece2d859
|
548
|
u_char cimaxslotindex, cicflag;
|
| mbed714 |
0:d616ece2d859
|
549
|
u_char citype, cilen, *next;
|
| mbed714 |
0:d616ece2d859
|
550
|
u_short cishort;
|
| mbed714 |
0:d616ece2d859
|
551
|
u32_t ciaddr1, ciaddr2, l, cidnsaddr;
|
| mbed714 |
0:d616ece2d859
|
552
|
ipcp_options no; /* options we've seen Naks for */
|
| mbed714 |
0:d616ece2d859
|
553
|
ipcp_options try; /* options to request next time */
|
| mbed714 |
0:d616ece2d859
|
554
|
|
| mbed714 |
0:d616ece2d859
|
555
|
BZERO(&no, sizeof(no));
|
| mbed714 |
0:d616ece2d859
|
556
|
try = *go;
|
| mbed714 |
0:d616ece2d859
|
557
|
|
| mbed714 |
0:d616ece2d859
|
558
|
/*
|
| mbed714 |
0:d616ece2d859
|
559
|
* Any Nak'd CIs must be in exactly the same order that we sent.
|
| mbed714 |
0:d616ece2d859
|
560
|
* Check packet length and CI length at each step.
|
| mbed714 |
0:d616ece2d859
|
561
|
* If we find any deviations, then this packet is bad.
|
| mbed714 |
0:d616ece2d859
|
562
|
*/
|
| mbed714 |
0:d616ece2d859
|
563
|
#define NAKCIADDR(opt, neg, old, code) \
|
| mbed714 |
0:d616ece2d859
|
564
|
if (go->neg && \
|
| mbed714 |
0:d616ece2d859
|
565
|
len >= (cilen = (old? CILEN_ADDRS: CILEN_ADDR)) && \
|
| mbed714 |
0:d616ece2d859
|
566
|
p[1] == cilen && \
|
| mbed714 |
0:d616ece2d859
|
567
|
p[0] == opt) { \
|
| mbed714 |
0:d616ece2d859
|
568
|
len -= cilen; \
|
| mbed714 |
0:d616ece2d859
|
569
|
INCPTR(2, p); \
|
| mbed714 |
0:d616ece2d859
|
570
|
GETLONG(l, p); \
|
| mbed714 |
0:d616ece2d859
|
571
|
ciaddr1 = htonl(l); \
|
| mbed714 |
0:d616ece2d859
|
572
|
if (old) { \
|
| mbed714 |
0:d616ece2d859
|
573
|
GETLONG(l, p); \
|
| mbed714 |
0:d616ece2d859
|
574
|
ciaddr2 = htonl(l); \
|
| mbed714 |
0:d616ece2d859
|
575
|
no.old_addrs = 1; \
|
| mbed714 |
0:d616ece2d859
|
576
|
} else { \
|
| mbed714 |
0:d616ece2d859
|
577
|
ciaddr2 = 0; \
|
| mbed714 |
0:d616ece2d859
|
578
|
} \
|
| mbed714 |
0:d616ece2d859
|
579
|
no.neg = 1; \
|
| mbed714 |
0:d616ece2d859
|
580
|
code \
|
| mbed714 |
0:d616ece2d859
|
581
|
}
|
| mbed714 |
0:d616ece2d859
|
582
|
|
| mbed714 |
0:d616ece2d859
|
583
|
#define NAKCIVJ(opt, neg, code) \
|
| mbed714 |
0:d616ece2d859
|
584
|
if (go->neg && \
|
| mbed714 |
0:d616ece2d859
|
585
|
((cilen = p[1]) == CILEN_COMPRESS || cilen == CILEN_VJ) && \
|
| mbed714 |
0:d616ece2d859
|
586
|
len >= cilen && \
|
| mbed714 |
0:d616ece2d859
|
587
|
p[0] == opt) { \
|
| mbed714 |
0:d616ece2d859
|
588
|
len -= cilen; \
|
| mbed714 |
0:d616ece2d859
|
589
|
INCPTR(2, p); \
|
| mbed714 |
0:d616ece2d859
|
590
|
GETSHORT(cishort, p); \
|
| mbed714 |
0:d616ece2d859
|
591
|
no.neg = 1; \
|
| mbed714 |
0:d616ece2d859
|
592
|
code \
|
| mbed714 |
0:d616ece2d859
|
593
|
}
|
| mbed714 |
0:d616ece2d859
|
594
|
|
| mbed714 |
0:d616ece2d859
|
595
|
#define NAKCIDNS(opt, neg, code) \
|
| mbed714 |
0:d616ece2d859
|
596
|
if (go->neg && \
|
| mbed714 |
0:d616ece2d859
|
597
|
((cilen = p[1]) == CILEN_ADDR) && \
|
| mbed714 |
0:d616ece2d859
|
598
|
len >= cilen && \
|
| mbed714 |
0:d616ece2d859
|
599
|
p[0] == opt) { \
|
| mbed714 |
0:d616ece2d859
|
600
|
len -= cilen; \
|
| mbed714 |
0:d616ece2d859
|
601
|
INCPTR(2, p); \
|
| mbed714 |
0:d616ece2d859
|
602
|
GETLONG(l, p); \
|
| mbed714 |
0:d616ece2d859
|
603
|
cidnsaddr = htonl(l); \
|
| mbed714 |
0:d616ece2d859
|
604
|
no.neg = 1; \
|
| mbed714 |
0:d616ece2d859
|
605
|
code \
|
| mbed714 |
0:d616ece2d859
|
606
|
}
|
| mbed714 |
0:d616ece2d859
|
607
|
|
| mbed714 |
0:d616ece2d859
|
608
|
/*
|
| mbed714 |
0:d616ece2d859
|
609
|
* Accept the peer's idea of {our,his} address, if different
|
| mbed714 |
0:d616ece2d859
|
610
|
* from our idea, only if the accept_{local,remote} flag is set.
|
| mbed714 |
0:d616ece2d859
|
611
|
*/
|
| mbed714 |
0:d616ece2d859
|
612
|
NAKCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), neg_addr, go->old_addrs,
|
| mbed714 |
0:d616ece2d859
|
613
|
if (go->accept_local && ciaddr1) { /* Do we know our address? */
|
| mbed714 |
0:d616ece2d859
|
614
|
try.ouraddr = ciaddr1;
|
| mbed714 |
0:d616ece2d859
|
615
|
IPCPDEBUG(LOG_INFO, ("local IP address %s\n",
|
| mbed714 |
0:d616ece2d859
|
616
|
inet_ntoa(ciaddr1)));
|
| mbed714 |
0:d616ece2d859
|
617
|
}
|
| mbed714 |
0:d616ece2d859
|
618
|
if (go->accept_remote && ciaddr2) { /* Does he know his? */
|
| mbed714 |
0:d616ece2d859
|
619
|
try.hisaddr = ciaddr2;
|
| mbed714 |
0:d616ece2d859
|
620
|
IPCPDEBUG(LOG_INFO, ("remote IP address %s\n",
|
| mbed714 |
0:d616ece2d859
|
621
|
inet_ntoa(ciaddr2)));
|
| mbed714 |
0:d616ece2d859
|
622
|
}
|
| mbed714 |
0:d616ece2d859
|
623
|
);
|
| mbed714 |
0:d616ece2d859
|
624
|
|
| mbed714 |
0:d616ece2d859
|
625
|
/*
|
| mbed714 |
0:d616ece2d859
|
626
|
* Accept the peer's value of maxslotindex provided that it
|
| mbed714 |
0:d616ece2d859
|
627
|
* is less than what we asked for. Turn off slot-ID compression
|
| mbed714 |
0:d616ece2d859
|
628
|
* if the peer wants. Send old-style compress-type option if
|
| mbed714 |
0:d616ece2d859
|
629
|
* the peer wants.
|
| mbed714 |
0:d616ece2d859
|
630
|
*/
|
| mbed714 |
0:d616ece2d859
|
631
|
NAKCIVJ(CI_COMPRESSTYPE, neg_vj,
|
| mbed714 |
0:d616ece2d859
|
632
|
if (cilen == CILEN_VJ) {
|
| mbed714 |
0:d616ece2d859
|
633
|
GETCHAR(cimaxslotindex, p);
|
| mbed714 |
0:d616ece2d859
|
634
|
GETCHAR(cicflag, p);
|
| mbed714 |
0:d616ece2d859
|
635
|
if (cishort == IPCP_VJ_COMP) {
|
| mbed714 |
0:d616ece2d859
|
636
|
try.old_vj = 0;
|
| mbed714 |
0:d616ece2d859
|
637
|
if (cimaxslotindex < go->maxslotindex) {
|
| mbed714 |
0:d616ece2d859
|
638
|
try.maxslotindex = cimaxslotindex;
|
| mbed714 |
0:d616ece2d859
|
639
|
}
|
| mbed714 |
0:d616ece2d859
|
640
|
if (!cicflag) {
|
| mbed714 |
0:d616ece2d859
|
641
|
try.cflag = 0;
|
| mbed714 |
0:d616ece2d859
|
642
|
}
|
| mbed714 |
0:d616ece2d859
|
643
|
} else {
|
| mbed714 |
0:d616ece2d859
|
644
|
try.neg_vj = 0;
|
| mbed714 |
0:d616ece2d859
|
645
|
}
|
| mbed714 |
0:d616ece2d859
|
646
|
} else {
|
| mbed714 |
0:d616ece2d859
|
647
|
if (cishort == IPCP_VJ_COMP || cishort == IPCP_VJ_COMP_OLD) {
|
| mbed714 |
0:d616ece2d859
|
648
|
try.old_vj = 1;
|
| mbed714 |
0:d616ece2d859
|
649
|
try.vj_protocol = cishort;
|
| mbed714 |
0:d616ece2d859
|
650
|
} else {
|
| mbed714 |
0:d616ece2d859
|
651
|
try.neg_vj = 0;
|
| mbed714 |
0:d616ece2d859
|
652
|
}
|
| mbed714 |
0:d616ece2d859
|
653
|
}
|
| mbed714 |
0:d616ece2d859
|
654
|
);
|
| mbed714 |
0:d616ece2d859
|
655
|
|
| mbed714 |
0:d616ece2d859
|
656
|
NAKCIDNS(CI_MS_DNS1, req_dns1,
|
| mbed714 |
0:d616ece2d859
|
657
|
try.dnsaddr[0] = cidnsaddr;
|
| mbed714 |
0:d616ece2d859
|
658
|
IPCPDEBUG(LOG_INFO, ("primary DNS address %s\n", inet_ntoa(cidnsaddr)));
|
| mbed714 |
0:d616ece2d859
|
659
|
);
|
| mbed714 |
0:d616ece2d859
|
660
|
|
| mbed714 |
0:d616ece2d859
|
661
|
NAKCIDNS(CI_MS_DNS2, req_dns2,
|
| mbed714 |
0:d616ece2d859
|
662
|
try.dnsaddr[1] = cidnsaddr;
|
| mbed714 |
0:d616ece2d859
|
663
|
IPCPDEBUG(LOG_INFO, ("secondary DNS address %s\n", inet_ntoa(cidnsaddr)));
|
| mbed714 |
0:d616ece2d859
|
664
|
);
|
| mbed714 |
0:d616ece2d859
|
665
|
|
| mbed714 |
0:d616ece2d859
|
666
|
/*
|
| mbed714 |
0:d616ece2d859
|
667
|
* There may be remaining CIs, if the peer is requesting negotiation
|
| mbed714 |
0:d616ece2d859
|
668
|
* on an option that we didn't include in our request packet.
|
| mbed714 |
0:d616ece2d859
|
669
|
* If they want to negotiate about IP addresses, we comply.
|
| mbed714 |
0:d616ece2d859
|
670
|
* If they want us to ask for compression, we refuse.
|
| mbed714 |
0:d616ece2d859
|
671
|
*/
|
| mbed714 |
0:d616ece2d859
|
672
|
while (len > CILEN_VOID) {
|
| mbed714 |
0:d616ece2d859
|
673
|
GETCHAR(citype, p);
|
| mbed714 |
0:d616ece2d859
|
674
|
GETCHAR(cilen, p);
|
| mbed714 |
0:d616ece2d859
|
675
|
if( (len -= cilen) < 0 ) {
|
| mbed714 |
0:d616ece2d859
|
676
|
goto bad;
|
| mbed714 |
0:d616ece2d859
|
677
|
}
|
| mbed714 |
0:d616ece2d859
|
678
|
next = p + cilen - 2;
|
| mbed714 |
0:d616ece2d859
|
679
|
|
| mbed714 |
0:d616ece2d859
|
680
|
switch (citype) {
|
| mbed714 |
0:d616ece2d859
|
681
|
case CI_COMPRESSTYPE:
|
| mbed714 |
0:d616ece2d859
|
682
|
if (go->neg_vj || no.neg_vj ||
|
| mbed714 |
0:d616ece2d859
|
683
|
(cilen != CILEN_VJ && cilen != CILEN_COMPRESS)) {
|
| mbed714 |
0:d616ece2d859
|
684
|
goto bad;
|
| mbed714 |
0:d616ece2d859
|
685
|
}
|
| mbed714 |
0:d616ece2d859
|
686
|
no.neg_vj = 1;
|
| mbed714 |
0:d616ece2d859
|
687
|
break;
|
| mbed714 |
0:d616ece2d859
|
688
|
case CI_ADDRS:
|
| mbed714 |
0:d616ece2d859
|
689
|
if ((go->neg_addr && go->old_addrs) || no.old_addrs
|
| mbed714 |
0:d616ece2d859
|
690
|
|| cilen != CILEN_ADDRS) {
|
| mbed714 |
0:d616ece2d859
|
691
|
goto bad;
|
| mbed714 |
0:d616ece2d859
|
692
|
}
|
| mbed714 |
0:d616ece2d859
|
693
|
try.neg_addr = 1;
|
| mbed714 |
0:d616ece2d859
|
694
|
try.old_addrs = 1;
|
| mbed714 |
0:d616ece2d859
|
695
|
GETLONG(l, p);
|
| mbed714 |
0:d616ece2d859
|
696
|
ciaddr1 = htonl(l);
|
| mbed714 |
0:d616ece2d859
|
697
|
if (ciaddr1 && go->accept_local) {
|
| mbed714 |
0:d616ece2d859
|
698
|
try.ouraddr = ciaddr1;
|
| mbed714 |
0:d616ece2d859
|
699
|
}
|
| mbed714 |
0:d616ece2d859
|
700
|
GETLONG(l, p);
|
| mbed714 |
0:d616ece2d859
|
701
|
ciaddr2 = htonl(l);
|
| mbed714 |
0:d616ece2d859
|
702
|
if (ciaddr2 && go->accept_remote) {
|
| mbed714 |
0:d616ece2d859
|
703
|
try.hisaddr = ciaddr2;
|
| mbed714 |
0:d616ece2d859
|
704
|
}
|
| mbed714 |
0:d616ece2d859
|
705
|
no.old_addrs = 1;
|
| mbed714 |
0:d616ece2d859
|
706
|
break;
|
| mbed714 |
0:d616ece2d859
|
707
|
case CI_ADDR:
|
| mbed714 |
0:d616ece2d859
|
708
|
if (go->neg_addr || no.neg_addr || cilen != CILEN_ADDR) {
|
| mbed714 |
0:d616ece2d859
|
709
|
goto bad;
|
| mbed714 |
0:d616ece2d859
|
710
|
}
|
| mbed714 |
0:d616ece2d859
|
711
|
try.old_addrs = 0;
|
| mbed714 |
0:d616ece2d859
|
712
|
GETLONG(l, p);
|
| mbed714 |
0:d616ece2d859
|
713
|
ciaddr1 = htonl(l);
|
| mbed714 |
0:d616ece2d859
|
714
|
if (ciaddr1 && go->accept_local) {
|
| mbed714 |
0:d616ece2d859
|
715
|
try.ouraddr = ciaddr1;
|
| mbed714 |
0:d616ece2d859
|
716
|
}
|
| mbed714 |
0:d616ece2d859
|
717
|
if (try.ouraddr != 0) {
|
| mbed714 |
0:d616ece2d859
|
718
|
try.neg_addr = 1;
|
| mbed714 |
0:d616ece2d859
|
719
|
}
|
| mbed714 |
0:d616ece2d859
|
720
|
no.neg_addr = 1;
|
| mbed714 |
0:d616ece2d859
|
721
|
break;
|
| mbed714 |
0:d616ece2d859
|
722
|
}
|
| mbed714 |
0:d616ece2d859
|
723
|
p = next;
|
| mbed714 |
0:d616ece2d859
|
724
|
}
|
| mbed714 |
0:d616ece2d859
|
725
|
|
| mbed714 |
0:d616ece2d859
|
726
|
/* If there is still anything left, this packet is bad. */
|
| mbed714 |
0:d616ece2d859
|
727
|
if (len != 0) {
|
| mbed714 |
0:d616ece2d859
|
728
|
goto bad;
|
| mbed714 |
0:d616ece2d859
|
729
|
}
|
| mbed714 |
0:d616ece2d859
|
730
|
|
| mbed714 |
0:d616ece2d859
|
731
|
/*
|
| mbed714 |
0:d616ece2d859
|
732
|
* OK, the Nak is good. Now we can update state.
|
| mbed714 |
0:d616ece2d859
|
733
|
*/
|
| mbed714 |
0:d616ece2d859
|
734
|
if (f->state != LS_OPENED) {
|
| mbed714 |
0:d616ece2d859
|
735
|
*go = try;
|
| mbed714 |
0:d616ece2d859
|
736
|
}
|
| mbed714 |
0:d616ece2d859
|
737
|
|
| mbed714 |
0:d616ece2d859
|
738
|
return 1;
|
| mbed714 |
0:d616ece2d859
|
739
|
|
| mbed714 |
0:d616ece2d859
|
740
|
bad:
|
| mbed714 |
0:d616ece2d859
|
741
|
IPCPDEBUG(LOG_INFO, ("ipcp_nakci: received bad Nak!\n"));
|
| mbed714 |
0:d616ece2d859
|
742
|
return 0;
|
| mbed714 |
0:d616ece2d859
|
743
|
}
|
| mbed714 |
0:d616ece2d859
|
744
|
|
| mbed714 |
0:d616ece2d859
|
745
|
|
| mbed714 |
0:d616ece2d859
|
746
|
/*
|
| mbed714 |
0:d616ece2d859
|
747
|
* ipcp_rejci - Reject some of our CIs.
|
| mbed714 |
0:d616ece2d859
|
748
|
*/
|
| mbed714 |
0:d616ece2d859
|
749
|
static int
|
| mbed714 |
0:d616ece2d859
|
750
|
ipcp_rejci(fsm *f, u_char *p, int len)
|
| mbed714 |
0:d616ece2d859
|
751
|
{
|
| mbed714 |
0:d616ece2d859
|
752
|
ipcp_options *go = &ipcp_gotoptions[f->unit];
|
| mbed714 |
0:d616ece2d859
|
753
|
u_char cimaxslotindex, ciflag, cilen;
|
| mbed714 |
0:d616ece2d859
|
754
|
u_short cishort;
|
| mbed714 |
0:d616ece2d859
|
755
|
u32_t cilong;
|
| mbed714 |
0:d616ece2d859
|
756
|
ipcp_options try; /* options to request next time */
|
| mbed714 |
0:d616ece2d859
|
757
|
|
| mbed714 |
0:d616ece2d859
|
758
|
try = *go;
|
| mbed714 |
0:d616ece2d859
|
759
|
/*
|
| mbed714 |
0:d616ece2d859
|
760
|
* Any Rejected CIs must be in exactly the same order that we sent.
|
| mbed714 |
0:d616ece2d859
|
761
|
* Check packet length and CI length at each step.
|
| mbed714 |
0:d616ece2d859
|
762
|
* If we find any deviations, then this packet is bad.
|
| mbed714 |
0:d616ece2d859
|
763
|
*/
|
| mbed714 |
0:d616ece2d859
|
764
|
#define REJCIADDR(opt, neg, old, val1, val2) \
|
| mbed714 |
0:d616ece2d859
|
765
|
if (go->neg && \
|
| mbed714 |
0:d616ece2d859
|
766
|
len >= (cilen = old? CILEN_ADDRS: CILEN_ADDR) && \
|
| mbed714 |
0:d616ece2d859
|
767
|
p[1] == cilen && \
|
| mbed714 |
0:d616ece2d859
|
768
|
p[0] == opt) { \
|
| mbed714 |
0:d616ece2d859
|
769
|
u32_t l; \
|
| mbed714 |
0:d616ece2d859
|
770
|
len -= cilen; \
|
| mbed714 |
0:d616ece2d859
|
771
|
INCPTR(2, p); \
|
| mbed714 |
0:d616ece2d859
|
772
|
GETLONG(l, p); \
|
| mbed714 |
0:d616ece2d859
|
773
|
cilong = htonl(l); \
|
| mbed714 |
0:d616ece2d859
|
774
|
/* Check rejected value. */ \
|
| mbed714 |
0:d616ece2d859
|
775
|
if (cilong != val1) { \
|
| mbed714 |
0:d616ece2d859
|
776
|
goto bad; \
|
| mbed714 |
0:d616ece2d859
|
777
|
} \
|
| mbed714 |
0:d616ece2d859
|
778
|
if (old) { \
|
| mbed714 |
0:d616ece2d859
|
779
|
GETLONG(l, p); \
|
| mbed714 |
0:d616ece2d859
|
780
|
cilong = htonl(l); \
|
| mbed714 |
0:d616ece2d859
|
781
|
/* Check rejected value. */ \
|
| mbed714 |
0:d616ece2d859
|
782
|
if (cilong != val2) { \
|
| mbed714 |
0:d616ece2d859
|
783
|
goto bad; \
|
| mbed714 |
0:d616ece2d859
|
784
|
} \
|
| mbed714 |
0:d616ece2d859
|
785
|
} \
|
| mbed714 |
0:d616ece2d859
|
786
|
try.neg = 0; \
|
| mbed714 |
0:d616ece2d859
|
787
|
}
|
| mbed714 |
0:d616ece2d859
|
788
|
|
| mbed714 |
0:d616ece2d859
|
789
|
#define REJCIVJ(opt, neg, val, old, maxslot, cflag) \
|
| mbed714 |
0:d616ece2d859
|
790
|
if (go->neg && \
|
| mbed714 |
0:d616ece2d859
|
791
|
p[1] == (old? CILEN_COMPRESS : CILEN_VJ) && \
|
| mbed714 |
0:d616ece2d859
|
792
|
len >= p[1] && \
|
| mbed714 |
0:d616ece2d859
|
793
|
p[0] == opt) { \
|
| mbed714 |
0:d616ece2d859
|
794
|
len -= p[1]; \
|
| mbed714 |
0:d616ece2d859
|
795
|
INCPTR(2, p); \
|
| mbed714 |
0:d616ece2d859
|
796
|
GETSHORT(cishort, p); \
|
| mbed714 |
0:d616ece2d859
|
797
|
/* Check rejected value. */ \
|
| mbed714 |
0:d616ece2d859
|
798
|
if (cishort != val) { \
|
| mbed714 |
0:d616ece2d859
|
799
|
goto bad; \
|
| mbed714 |
0:d616ece2d859
|
800
|
} \
|
| mbed714 |
0:d616ece2d859
|
801
|
if (!old) { \
|
| mbed714 |
0:d616ece2d859
|
802
|
GETCHAR(cimaxslotindex, p); \
|
| mbed714 |
0:d616ece2d859
|
803
|
if (cimaxslotindex != maxslot) { \
|
| mbed714 |
0:d616ece2d859
|
804
|
goto bad; \
|
| mbed714 |
0:d616ece2d859
|
805
|
} \
|
| mbed714 |
0:d616ece2d859
|
806
|
GETCHAR(ciflag, p); \
|
| mbed714 |
0:d616ece2d859
|
807
|
if (ciflag != cflag) { \
|
| mbed714 |
0:d616ece2d859
|
808
|
goto bad; \
|
| mbed714 |
0:d616ece2d859
|
809
|
} \
|
| mbed714 |
0:d616ece2d859
|
810
|
} \
|
| mbed714 |
0:d616ece2d859
|
811
|
try.neg = 0; \
|
| mbed714 |
0:d616ece2d859
|
812
|
}
|
| mbed714 |
0:d616ece2d859
|
813
|
|
| mbed714 |
0:d616ece2d859
|
814
|
#define REJCIDNS(opt, neg, dnsaddr) \
|
| mbed714 |
0:d616ece2d859
|
815
|
if (go->neg && \
|
| mbed714 |
0:d616ece2d859
|
816
|
((cilen = p[1]) == CILEN_ADDR) && \
|
| mbed714 |
0:d616ece2d859
|
817
|
len >= cilen && \
|
| mbed714 |
0:d616ece2d859
|
818
|
p[0] == opt) { \
|
| mbed714 |
0:d616ece2d859
|
819
|
u32_t l; \
|
| mbed714 |
0:d616ece2d859
|
820
|
len -= cilen; \
|
| mbed714 |
0:d616ece2d859
|
821
|
INCPTR(2, p); \
|
| mbed714 |
0:d616ece2d859
|
822
|
GETLONG(l, p); \
|
| mbed714 |
0:d616ece2d859
|
823
|
cilong = htonl(l); \
|
| mbed714 |
0:d616ece2d859
|
824
|
/* Check rejected value. */ \
|
| mbed714 |
0:d616ece2d859
|
825
|
if (cilong != dnsaddr) { \
|
| mbed714 |
0:d616ece2d859
|
826
|
goto bad; \
|
| mbed714 |
0:d616ece2d859
|
827
|
} \
|
| mbed714 |
0:d616ece2d859
|
828
|
try.neg = 0; \
|
| mbed714 |
0:d616ece2d859
|
829
|
}
|
| mbed714 |
0:d616ece2d859
|
830
|
|
| mbed714 |
0:d616ece2d859
|
831
|
REJCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), neg_addr,
|
| mbed714 |
0:d616ece2d859
|
832
|
go->old_addrs, go->ouraddr, go->hisaddr);
|
| mbed714 |
0:d616ece2d859
|
833
|
|
| mbed714 |
0:d616ece2d859
|
834
|
REJCIVJ(CI_COMPRESSTYPE, neg_vj, go->vj_protocol, go->old_vj,
|
| mbed714 |
0:d616ece2d859
|
835
|
go->maxslotindex, go->cflag);
|
| mbed714 |
0:d616ece2d859
|
836
|
|
| mbed714 |
0:d616ece2d859
|
837
|
REJCIDNS(CI_MS_DNS1, req_dns1, go->dnsaddr[0]);
|
| mbed714 |
0:d616ece2d859
|
838
|
|
| mbed714 |
0:d616ece2d859
|
839
|
REJCIDNS(CI_MS_DNS2, req_dns2, go->dnsaddr[1]);
|
| mbed714 |
0:d616ece2d859
|
840
|
|
| mbed714 |
0:d616ece2d859
|
841
|
/*
|
| mbed714 |
0:d616ece2d859
|
842
|
* If there are any remaining CIs, then this packet is bad.
|
| mbed714 |
0:d616ece2d859
|
843
|
*/
|
| mbed714 |
0:d616ece2d859
|
844
|
if (len != 0) {
|
| mbed714 |
0:d616ece2d859
|
845
|
goto bad;
|
| mbed714 |
0:d616ece2d859
|
846
|
}
|
| mbed714 |
0:d616ece2d859
|
847
|
/*
|
| mbed714 |
0:d616ece2d859
|
848
|
* Now we can update state.
|
| mbed714 |
0:d616ece2d859
|
849
|
*/
|
| mbed714 |
0:d616ece2d859
|
850
|
if (f->state != LS_OPENED) {
|
| mbed714 |
0:d616ece2d859
|
851
|
*go = try;
|
| mbed714 |
0:d616ece2d859
|
852
|
}
|
| mbed714 |
0:d616ece2d859
|
853
|
return 1;
|
| mbed714 |
0:d616ece2d859
|
854
|
|
| mbed714 |
0:d616ece2d859
|
855
|
bad:
|
| mbed714 |
0:d616ece2d859
|
856
|
IPCPDEBUG(LOG_INFO, ("ipcp_rejci: received bad Reject!\n"));
|
| mbed714 |
0:d616ece2d859
|
857
|
return 0;
|
| mbed714 |
0:d616ece2d859
|
858
|
}
|
| mbed714 |
0:d616ece2d859
|
859
|
|
| mbed714 |
0:d616ece2d859
|
860
|
|
| mbed714 |
0:d616ece2d859
|
861
|
/*
|
| mbed714 |
0:d616ece2d859
|
862
|
* ipcp_reqci - Check the peer's requested CIs and send appropriate response.
|
| mbed714 |
0:d616ece2d859
|
863
|
*
|
| mbed714 |
0:d616ece2d859
|
864
|
* Returns: CONFACK, CONFNAK or CONFREJ and input packet modified
|
| mbed714 |
0:d616ece2d859
|
865
|
* appropriately. If reject_if_disagree is non-zero, doesn't return
|
| mbed714 |
0:d616ece2d859
|
866
|
* CONFNAK; returns CONFREJ if it can't return CONFACK.
|
| mbed714 |
0:d616ece2d859
|
867
|
*/
|
| mbed714 |
0:d616ece2d859
|
868
|
static int
|
| mbed714 |
0:d616ece2d859
|
869
|
ipcp_reqci(fsm *f, u_char *inp/* Requested CIs */,int *len/* Length of requested CIs */,int reject_if_disagree)
|
| mbed714 |
0:d616ece2d859
|
870
|
{
|
| mbed714 |
0:d616ece2d859
|
871
|
ipcp_options *wo = &ipcp_wantoptions[f->unit];
|
| mbed714 |
0:d616ece2d859
|
872
|
ipcp_options *ho = &ipcp_hisoptions[f->unit];
|
| mbed714 |
0:d616ece2d859
|
873
|
ipcp_options *ao = &ipcp_allowoptions[f->unit];
|
| mbed714 |
0:d616ece2d859
|
874
|
#ifdef OLD_CI_ADDRS
|
| mbed714 |
0:d616ece2d859
|
875
|
ipcp_options *go = &ipcp_gotoptions[f->unit];
|
| mbed714 |
0:d616ece2d859
|
876
|
#endif
|
| mbed714 |
0:d616ece2d859
|
877
|
u_char *cip, *next; /* Pointer to current and next CIs */
|
| mbed714 |
0:d616ece2d859
|
878
|
u_short cilen, citype; /* Parsed len, type */
|
| mbed714 |
0:d616ece2d859
|
879
|
u_short cishort; /* Parsed short value */
|
| mbed714 |
0:d616ece2d859
|
880
|
u32_t tl, ciaddr1; /* Parsed address values */
|
| mbed714 |
0:d616ece2d859
|
881
|
#ifdef OLD_CI_ADDRS
|
| mbed714 |
0:d616ece2d859
|
882
|
u32_t ciaddr2; /* Parsed address values */
|
| mbed714 |
0:d616ece2d859
|
883
|
#endif
|
| mbed714 |
0:d616ece2d859
|
884
|
int rc = CONFACK; /* Final packet return code */
|
| mbed714 |
0:d616ece2d859
|
885
|
int orc; /* Individual option return code */
|
| mbed714 |
0:d616ece2d859
|
886
|
u_char *p; /* Pointer to next char to parse */
|
| mbed714 |
0:d616ece2d859
|
887
|
u_char *ucp = inp; /* Pointer to current output char */
|
| mbed714 |
0:d616ece2d859
|
888
|
int l = *len; /* Length left */
|
| mbed714 |
0:d616ece2d859
|
889
|
u_char maxslotindex, cflag;
|
| mbed714 |
0:d616ece2d859
|
890
|
int d;
|
| mbed714 |
0:d616ece2d859
|
891
|
|
| mbed714 |
0:d616ece2d859
|
892
|
cis_received[f->unit] = 1;
|
| mbed714 |
0:d616ece2d859
|
893
|
|
| mbed714 |
0:d616ece2d859
|
894
|
/*
|
| mbed714 |
0:d616ece2d859
|
895
|
* Reset all his options.
|
| mbed714 |
0:d616ece2d859
|
896
|
*/
|
| mbed714 |
0:d616ece2d859
|
897
|
BZERO(ho, sizeof(*ho));
|
| mbed714 |
0:d616ece2d859
|
898
|
|
| mbed714 |
0:d616ece2d859
|
899
|
/*
|
| mbed714 |
0:d616ece2d859
|
900
|
* Process all his options.
|
| mbed714 |
0:d616ece2d859
|
901
|
*/
|
| mbed714 |
0:d616ece2d859
|
902
|
next = inp;
|
| mbed714 |
0:d616ece2d859
|
903
|
while (l) {
|
| mbed714 |
0:d616ece2d859
|
904
|
orc = CONFACK; /* Assume success */
|
| mbed714 |
0:d616ece2d859
|
905
|
cip = p = next; /* Remember begining of CI */
|
| mbed714 |
0:d616ece2d859
|
906
|
if (l < 2 || /* Not enough data for CI header or */
|
| mbed714 |
0:d616ece2d859
|
907
|
p[1] < 2 || /* CI length too small or */
|
| mbed714 |
0:d616ece2d859
|
908
|
p[1] > l) { /* CI length too big? */
|
| mbed714 |
0:d616ece2d859
|
909
|
IPCPDEBUG(LOG_INFO, ("ipcp_reqci: bad CI length!\n"));
|
| mbed714 |
0:d616ece2d859
|
910
|
orc = CONFREJ; /* Reject bad CI */
|
| mbed714 |
0:d616ece2d859
|
911
|
cilen = (u_short)l;/* Reject till end of packet */
|
| mbed714 |
0:d616ece2d859
|
912
|
l = 0; /* Don't loop again */
|
| mbed714 |
0:d616ece2d859
|
913
|
goto endswitch;
|
| mbed714 |
0:d616ece2d859
|
914
|
}
|
| mbed714 |
0:d616ece2d859
|
915
|
GETCHAR(citype, p); /* Parse CI type */
|
| mbed714 |
0:d616ece2d859
|
916
|
GETCHAR(cilen, p); /* Parse CI length */
|
| mbed714 |
0:d616ece2d859
|
917
|
l -= cilen; /* Adjust remaining length */
|
| mbed714 |
0:d616ece2d859
|
918
|
next += cilen; /* Step to next CI */
|
| mbed714 |
0:d616ece2d859
|
919
|
|
| mbed714 |
0:d616ece2d859
|
920
|
switch (citype) { /* Check CI type */
|
| mbed714 |
0:d616ece2d859
|
921
|
#ifdef OLD_CI_ADDRS /* Need to save space... */
|
| mbed714 |
0:d616ece2d859
|
922
|
case CI_ADDRS:
|
| mbed714 |
0:d616ece2d859
|
923
|
IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received ADDRS\n"));
|
| mbed714 |
0:d616ece2d859
|
924
|
if (!ao->neg_addr ||
|
| mbed714 |
0:d616ece2d859
|
925
|
cilen != CILEN_ADDRS) { /* Check CI length */
|
| mbed714 |
0:d616ece2d859
|
926
|
orc = CONFREJ; /* Reject CI */
|
| mbed714 |
0:d616ece2d859
|
927
|
break;
|
| mbed714 |
0:d616ece2d859
|
928
|
}
|
| mbed714 |
0:d616ece2d859
|
929
|
|
| mbed714 |
0:d616ece2d859
|
930
|
/*
|
| mbed714 |
0:d616ece2d859
|
931
|
* If he has no address, or if we both have his address but
|
| mbed714 |
0:d616ece2d859
|
932
|
* disagree about it, then NAK it with our idea.
|
| mbed714 |
0:d616ece2d859
|
933
|
* In particular, if we don't know his address, but he does,
|
| mbed714 |
0:d616ece2d859
|
934
|
* then accept it.
|
| mbed714 |
0:d616ece2d859
|
935
|
*/
|
| mbed714 |
0:d616ece2d859
|
936
|
GETLONG(tl, p); /* Parse source address (his) */
|
| mbed714 |
0:d616ece2d859
|
937
|
ciaddr1 = htonl(tl);
|
| mbed714 |
0:d616ece2d859
|
938
|
IPCPDEBUG(LOG_INFO, ("his addr %s\n", inet_ntoa(ciaddr1)));
|
| mbed714 |
0:d616ece2d859
|
939
|
if (ciaddr1 != wo->hisaddr
|
| mbed714 |
0:d616ece2d859
|
940
|
&& (ciaddr1 == 0 || !wo->accept_remote)) {
|
| mbed714 |
0:d616ece2d859
|
941
|
orc = CONFNAK;
|
| mbed714 |
0:d616ece2d859
|
942
|
if (!reject_if_disagree) {
|
| mbed714 |
0:d616ece2d859
|
943
|
DECPTR(sizeof(u32_t), p);
|
| mbed714 |
0:d616ece2d859
|
944
|
tl = ntohl(wo->hisaddr);
|
| mbed714 |
0:d616ece2d859
|
945
|
PUTLONG(tl, p);
|
| mbed714 |
0:d616ece2d859
|
946
|
}
|
| mbed714 |
0:d616ece2d859
|
947
|
} else if (ciaddr1 == 0 && wo->hisaddr == 0) {
|
| mbed714 |
0:d616ece2d859
|
948
|
/*
|
| mbed714 |
0:d616ece2d859
|
949
|
* If neither we nor he knows his address, reject the option.
|
| mbed714 |
0:d616ece2d859
|
950
|
*/
|
| mbed714 |
0:d616ece2d859
|
951
|
orc = CONFREJ;
|
| mbed714 |
0:d616ece2d859
|
952
|
wo->req_addr = 0; /* don't NAK with 0.0.0.0 later */
|
| mbed714 |
0:d616ece2d859
|
953
|
break;
|
| mbed714 |
0:d616ece2d859
|
954
|
}
|
| mbed714 |
0:d616ece2d859
|
955
|
|
| mbed714 |
0:d616ece2d859
|
956
|
/*
|
| mbed714 |
0:d616ece2d859
|
957
|
* If he doesn't know our address, or if we both have our address
|
| mbed714 |
0:d616ece2d859
|
958
|
* but disagree about it, then NAK it with our idea.
|
| mbed714 |
0:d616ece2d859
|
959
|
*/
|
| mbed714 |
0:d616ece2d859
|
960
|
GETLONG(tl, p); /* Parse desination address (ours) */
|
| mbed714 |
0:d616ece2d859
|
961
|
ciaddr2 = htonl(tl);
|
| mbed714 |
0:d616ece2d859
|
962
|
IPCPDEBUG(LOG_INFO, ("our addr %s\n", inet_ntoa(ciaddr2)));
|
| mbed714 |
0:d616ece2d859
|
963
|
if (ciaddr2 != wo->ouraddr) {
|
| mbed714 |
0:d616ece2d859
|
964
|
if (ciaddr2 == 0 || !wo->accept_local) {
|
| mbed714 |
0:d616ece2d859
|
965
|
orc = CONFNAK;
|
| mbed714 |
0:d616ece2d859
|
966
|
if (!reject_if_disagree) {
|
| mbed714 |
0:d616ece2d859
|
967
|
DECPTR(sizeof(u32_t), p);
|
| mbed714 |
0:d616ece2d859
|
968
|
tl = ntohl(wo->ouraddr);
|
| mbed714 |
0:d616ece2d859
|
969
|
PUTLONG(tl, p);
|
| mbed714 |
0:d616ece2d859
|
970
|
}
|
| mbed714 |
0:d616ece2d859
|
971
|
} else {
|
| mbed714 |
0:d616ece2d859
|
972
|
go->ouraddr = ciaddr2; /* accept peer's idea */
|
| mbed714 |
0:d616ece2d859
|
973
|
}
|
| mbed714 |
0:d616ece2d859
|
974
|
}
|
| mbed714 |
0:d616ece2d859
|
975
|
|
| mbed714 |
0:d616ece2d859
|
976
|
ho->neg_addr = 1;
|
| mbed714 |
0:d616ece2d859
|
977
|
ho->old_addrs = 1;
|
| mbed714 |
0:d616ece2d859
|
978
|
ho->hisaddr = ciaddr1;
|
| mbed714 |
0:d616ece2d859
|
979
|
ho->ouraddr = ciaddr2;
|
| mbed714 |
0:d616ece2d859
|
980
|
break;
|
| mbed714 |
0:d616ece2d859
|
981
|
#endif
|
| mbed714 |
0:d616ece2d859
|
982
|
|
| mbed714 |
0:d616ece2d859
|
983
|
case CI_ADDR:
|
| mbed714 |
0:d616ece2d859
|
984
|
if (!ao->neg_addr) {
|
| mbed714 |
0:d616ece2d859
|
985
|
IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR not allowed\n"));
|
| mbed714 |
0:d616ece2d859
|
986
|
orc = CONFREJ; /* Reject CI */
|
| mbed714 |
0:d616ece2d859
|
987
|
break;
|
| mbed714 |
0:d616ece2d859
|
988
|
} else if (cilen != CILEN_ADDR) { /* Check CI length */
|
| mbed714 |
0:d616ece2d859
|
989
|
IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR bad len\n"));
|
| mbed714 |
0:d616ece2d859
|
990
|
orc = CONFREJ; /* Reject CI */
|
| mbed714 |
0:d616ece2d859
|
991
|
break;
|
| mbed714 |
0:d616ece2d859
|
992
|
}
|
| mbed714 |
0:d616ece2d859
|
993
|
|
| mbed714 |
0:d616ece2d859
|
994
|
/*
|
| mbed714 |
0:d616ece2d859
|
995
|
* If he has no address, or if we both have his address but
|
| mbed714 |
0:d616ece2d859
|
996
|
* disagree about it, then NAK it with our idea.
|
| mbed714 |
0:d616ece2d859
|
997
|
* In particular, if we don't know his address, but he does,
|
| mbed714 |
0:d616ece2d859
|
998
|
* then accept it.
|
| mbed714 |
0:d616ece2d859
|
999
|
*/
|
| mbed714 |
0:d616ece2d859
|
1000
|
GETLONG(tl, p); /* Parse source address (his) */
|
| mbed714 |
0:d616ece2d859
|
1001
|
ciaddr1 = htonl(tl);
|
| mbed714 |
0:d616ece2d859
|
1002
|
if (ciaddr1 != wo->hisaddr
|
| mbed714 |
0:d616ece2d859
|
1003
|
&& (ciaddr1 == 0 || !wo->accept_remote)) {
|
| mbed714 |
0:d616ece2d859
|
1004
|
orc = CONFNAK;
|
| mbed714 |
0:d616ece2d859
|
1005
|
if (!reject_if_disagree) {
|
| mbed714 |
0:d616ece2d859
|
1006
|
DECPTR(sizeof(u32_t), p);
|
| mbed714 |
0:d616ece2d859
|
1007
|
tl = ntohl(wo->hisaddr);
|
| mbed714 |
0:d616ece2d859
|
1008
|
PUTLONG(tl, p);
|
| mbed714 |
0:d616ece2d859
|
1009
|
}
|
| mbed714 |
0:d616ece2d859
|
1010
|
IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Nak ADDR %s\n", inet_ntoa(ciaddr1)));
|
| mbed714 |
0:d616ece2d859
|
1011
|
} else if (ciaddr1 == 0 && wo->hisaddr == 0) {
|
| mbed714 |
0:d616ece2d859
|
1012
|
/*
|
| mbed714 |
0:d616ece2d859
|
1013
|
* Don't ACK an address of 0.0.0.0 - reject it instead.
|
| mbed714 |
0:d616ece2d859
|
1014
|
*/
|
| mbed714 |
0:d616ece2d859
|
1015
|
IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR %s\n", inet_ntoa(ciaddr1)));
|
| mbed714 |
0:d616ece2d859
|
1016
|
orc = CONFREJ;
|
| mbed714 |
0:d616ece2d859
|
1017
|
wo->req_addr = 0; /* don't NAK with 0.0.0.0 later */
|
| mbed714 |
0:d616ece2d859
|
1018
|
break;
|
| mbed714 |
0:d616ece2d859
|
1019
|
}
|
| mbed714 |
0:d616ece2d859
|
1020
|
|
| mbed714 |
0:d616ece2d859
|
1021
|
ho->neg_addr = 1;
|
| mbed714 |
0:d616ece2d859
|
1022
|
ho->hisaddr = ciaddr1;
|
| mbed714 |
0:d616ece2d859
|
1023
|
IPCPDEBUG(LOG_INFO, ("ipcp_reqci: ADDR %s\n", inet_ntoa(ciaddr1)));
|
| mbed714 |
0:d616ece2d859
|
1024
|
break;
|
| mbed714 |
0:d616ece2d859
|
1025
|
|
| mbed714 |
0:d616ece2d859
|
1026
|
case CI_MS_DNS1:
|
| mbed714 |
0:d616ece2d859
|
1027
|
case CI_MS_DNS2:
|
| mbed714 |
0:d616ece2d859
|
1028
|
/* Microsoft primary or secondary DNS request */
|
| mbed714 |
0:d616ece2d859
|
1029
|
d = citype == CI_MS_DNS2;
|
| mbed714 |
0:d616ece2d859
|
1030
|
|
| mbed714 |
0:d616ece2d859
|
1031
|
/* If we do not have a DNS address then we cannot send it */
|
| mbed714 |
0:d616ece2d859
|
1032
|
if (ao->dnsaddr[d] == 0 ||
|
| mbed714 |
0:d616ece2d859
|
1033
|
cilen != CILEN_ADDR) { /* Check CI length */
|
| mbed714 |
0:d616ece2d859
|
1034
|
IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting DNS%d Request\n", d+1));
|
| mbed714 |
0:d616ece2d859
|
1035
|
orc = CONFREJ; /* Reject CI */
|
| mbed714 |
0:d616ece2d859
|
1036
|
break;
|
| mbed714 |
0:d616ece2d859
|
1037
|
}
|
| mbed714 |
0:d616ece2d859
|
1038
|
GETLONG(tl, p);
|
| mbed714 |
0:d616ece2d859
|
1039
|
if (htonl(tl) != ao->dnsaddr[d]) {
|
| mbed714 |
0:d616ece2d859
|
1040
|
IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking DNS%d Request %s\n",
|
| mbed714 |
0:d616ece2d859
|
1041
|
d+1, inet_ntoa(tl)));
|
| mbed714 |
0:d616ece2d859
|
1042
|
DECPTR(sizeof(u32_t), p);
|
| mbed714 |
0:d616ece2d859
|
1043
|
tl = ntohl(ao->dnsaddr[d]);
|
| mbed714 |
0:d616ece2d859
|
1044
|
PUTLONG(tl, p);
|
| mbed714 |
0:d616ece2d859
|
1045
|
orc = CONFNAK;
|
| mbed714 |
0:d616ece2d859
|
1046
|
}
|
| mbed714 |
0:d616ece2d859
|
1047
|
IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received DNS%d Request\n", d+1));
|
| mbed714 |
0:d616ece2d859
|
1048
|
break;
|
| mbed714 |
0:d616ece2d859
|
1049
|
|
| mbed714 |
0:d616ece2d859
|
1050
|
case CI_MS_WINS1:
|
| mbed714 |
0:d616ece2d859
|
1051
|
case CI_MS_WINS2:
|
| mbed714 |
0:d616ece2d859
|
1052
|
/* Microsoft primary or secondary WINS request */
|
| mbed714 |
0:d616ece2d859
|
1053
|
d = citype == CI_MS_WINS2;
|
| mbed714 |
0:d616ece2d859
|
1054
|
IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received WINS%d Request\n", d+1));
|
| mbed714 |
0:d616ece2d859
|
1055
|
|
| mbed714 |
0:d616ece2d859
|
1056
|
/* If we do not have a DNS address then we cannot send it */
|
| mbed714 |
0:d616ece2d859
|
1057
|
if (ao->winsaddr[d] == 0 ||
|
| mbed714 |
0:d616ece2d859
|
1058
|
cilen != CILEN_ADDR) { /* Check CI length */
|
| mbed714 |
0:d616ece2d859
|
1059
|
orc = CONFREJ; /* Reject CI */
|
| mbed714 |
0:d616ece2d859
|
1060
|
break;
|
| mbed714 |
0:d616ece2d859
|
1061
|
}
|
| mbed714 |
0:d616ece2d859
|
1062
|
GETLONG(tl, p);
|
| mbed714 |
0:d616ece2d859
|
1063
|
if (htonl(tl) != ao->winsaddr[d]) {
|
| mbed714 |
0:d616ece2d859
|
1064
|
DECPTR(sizeof(u32_t), p);
|
| mbed714 |
0:d616ece2d859
|
1065
|
tl = ntohl(ao->winsaddr[d]);
|
| mbed714 |
0:d616ece2d859
|
1066
|
PUTLONG(tl, p);
|
| mbed714 |
0:d616ece2d859
|
1067
|
orc = CONFNAK;
|
| mbed714 |
0:d616ece2d859
|
1068
|
}
|
| mbed714 |
0:d616ece2d859
|
1069
|
break;
|
| mbed714 |
0:d616ece2d859
|
1070
|
|
| mbed714 |
0:d616ece2d859
|
1071
|
case CI_COMPRESSTYPE:
|
| mbed714 |
0:d616ece2d859
|
1072
|
if (!ao->neg_vj) {
|
| mbed714 |
0:d616ece2d859
|
1073
|
IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE not allowed\n"));
|
| mbed714 |
0:d616ece2d859
|
1074
|
orc = CONFREJ;
|
| mbed714 |
0:d616ece2d859
|
1075
|
break;
|
| mbed714 |
0:d616ece2d859
|
1076
|
} else if (cilen != CILEN_VJ && cilen != CILEN_COMPRESS) {
|
| mbed714 |
0:d616ece2d859
|
1077
|
IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE len=%d\n", cilen));
|
| mbed714 |
0:d616ece2d859
|
1078
|
orc = CONFREJ;
|
| mbed714 |
0:d616ece2d859
|
1079
|
break;
|
| mbed714 |
0:d616ece2d859
|
1080
|
}
|
| mbed714 |
0:d616ece2d859
|
1081
|
GETSHORT(cishort, p);
|
| mbed714 |
0:d616ece2d859
|
1082
|
|
| mbed714 |
0:d616ece2d859
|
1083
|
if (!(cishort == IPCP_VJ_COMP ||
|
| mbed714 |
0:d616ece2d859
|
1084
|
(cishort == IPCP_VJ_COMP_OLD && cilen == CILEN_COMPRESS))) {
|
| mbed714 |
0:d616ece2d859
|
1085
|
IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE %d\n", cishort));
|
| mbed714 |
0:d616ece2d859
|
1086
|
orc = CONFREJ;
|
| mbed714 |
0:d616ece2d859
|
1087
|
break;
|
| mbed714 |
0:d616ece2d859
|
1088
|
}
|
| mbed714 |
0:d616ece2d859
|
1089
|
|
| mbed714 |
0:d616ece2d859
|
1090
|
ho->neg_vj = 1;
|
| mbed714 |
0:d616ece2d859
|
1091
|
ho->vj_protocol = cishort;
|
| mbed714 |
0:d616ece2d859
|
1092
|
if (cilen == CILEN_VJ) {
|
| mbed714 |
0:d616ece2d859
|
1093
|
GETCHAR(maxslotindex, p);
|
| mbed714 |
0:d616ece2d859
|
1094
|
if (maxslotindex > ao->maxslotindex) {
|
| mbed714 |
0:d616ece2d859
|
1095
|
IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking VJ max slot %d\n", maxslotindex));
|
| mbed714 |
0:d616ece2d859
|
1096
|
orc = CONFNAK;
|
| mbed714 |
0:d616ece2d859
|
1097
|
if (!reject_if_disagree) {
|
| mbed714 |
0:d616ece2d859
|
1098
|
DECPTR(1, p);
|
| mbed714 |
0:d616ece2d859
|
1099
|
PUTCHAR(ao->maxslotindex, p);
|
| mbed714 |
0:d616ece2d859
|
1100
|
}
|
| mbed714 |
0:d616ece2d859
|
1101
|
}
|
| mbed714 |
0:d616ece2d859
|
1102
|
GETCHAR(cflag, p);
|
| mbed714 |
0:d616ece2d859
|
1103
|
if (cflag && !ao->cflag) {
|
| mbed714 |
0:d616ece2d859
|
1104
|
IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking VJ cflag %d\n", cflag));
|
| mbed714 |
0:d616ece2d859
|
1105
|
orc = CONFNAK;
|
| mbed714 |
0:d616ece2d859
|
1106
|
if (!reject_if_disagree) {
|
| mbed714 |
0:d616ece2d859
|
1107
|
DECPTR(1, p);
|
| mbed714 |
0:d616ece2d859
|
1108
|
PUTCHAR(wo->cflag, p);
|
| mbed714 |
0:d616ece2d859
|
1109
|
}
|
| mbed714 |
0:d616ece2d859
|
1110
|
}
|
| mbed714 |
0:d616ece2d859
|
1111
|
ho->maxslotindex = maxslotindex;
|
| mbed714 |
0:d616ece2d859
|
1112
|
ho->cflag = cflag;
|
| mbed714 |
0:d616ece2d859
|
1113
|
} else {
|
| mbed714 |
0:d616ece2d859
|
1114
|
ho->old_vj = 1;
|
| mbed714 |
0:d616ece2d859
|
1115
|
ho->maxslotindex = MAX_SLOTS - 1;
|
| mbed714 |
0:d616ece2d859
|
1116
|
ho->cflag = 1;
|
| mbed714 |
0:d616ece2d859
|
1117
|
}
|
| mbed714 |
0:d616ece2d859
|
1118
|
IPCPDEBUG(LOG_INFO, (
|
| mbed714 |
0:d616ece2d859
|
1119
|
"ipcp_reqci: received COMPRESSTYPE p=%d old=%d maxslot=%d cflag=%d\n",
|
| mbed714 |
0:d616ece2d859
|
1120
|
ho->vj_protocol, ho->old_vj, ho->maxslotindex, ho->cflag));
|
| mbed714 |
0:d616ece2d859
|
1121
|
break;
|
| mbed714 |
0:d616ece2d859
|
1122
|
|
| mbed714 |
0:d616ece2d859
|
1123
|
default:
|
| mbed714 |
0:d616ece2d859
|
1124
|
IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting unknown CI type %d\n", citype));
|
| mbed714 |
0:d616ece2d859
|
1125
|
orc = CONFREJ;
|
| mbed714 |
0:d616ece2d859
|
1126
|
break;
|
| mbed714 |
0:d616ece2d859
|
1127
|
}
|
| mbed714 |
0:d616ece2d859
|
1128
|
|
| mbed714 |
0:d616ece2d859
|
1129
|
endswitch:
|
| mbed714 |
0:d616ece2d859
|
1130
|
if (orc == CONFACK && /* Good CI */
|
| mbed714 |
0:d616ece2d859
|
1131
|
rc != CONFACK) { /* but prior CI wasnt? */
|
| mbed714 |
0:d616ece2d859
|
1132
|
continue; /* Don't send this one */
|
| mbed714 |
0:d616ece2d859
|
1133
|
}
|
| mbed714 |
0:d616ece2d859
|
1134
|
|
| mbed714 |
0:d616ece2d859
|
1135
|
if (orc == CONFNAK) { /* Nak this CI? */
|
| mbed714 |
0:d616ece2d859
|
1136
|
if (reject_if_disagree) { /* Getting fed up with sending NAKs? */
|
| mbed714 |
0:d616ece2d859
|
1137
|
IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting too many naks\n"));
|
| mbed714 |
0:d616ece2d859
|
1138
|
orc = CONFREJ; /* Get tough if so */
|
| mbed714 |
0:d616ece2d859
|
1139
|
} else {
|
| mbed714 |
0:d616ece2d859
|
1140
|
if (rc == CONFREJ) { /* Rejecting prior CI? */
|
| mbed714 |
0:d616ece2d859
|
1141
|
continue; /* Don't send this one */
|
| mbed714 |
0:d616ece2d859
|
1142
|
}
|
| mbed714 |
0:d616ece2d859
|
1143
|
if (rc == CONFACK) { /* Ack'd all prior CIs? */
|
| mbed714 |
0:d616ece2d859
|
1144
|
rc = CONFNAK; /* Not anymore... */
|
| mbed714 |
0:d616ece2d859
|
1145
|
ucp = inp; /* Backup */
|
| mbed714 |
0:d616ece2d859
|
1146
|
}
|
| mbed714 |
0:d616ece2d859
|
1147
|
}
|
| mbed714 |
0:d616ece2d859
|
1148
|
}
|
| mbed714 |
0:d616ece2d859
|
1149
|
|
| mbed714 |
0:d616ece2d859
|
1150
|
if (orc == CONFREJ && /* Reject this CI */
|
| mbed714 |
0:d616ece2d859
|
1151
|
rc != CONFREJ) { /* but no prior ones? */
|
| mbed714 |
0:d616ece2d859
|
1152
|
rc = CONFREJ;
|
| mbed714 |
0:d616ece2d859
|
1153
|
ucp = inp; /* Backup */
|
| mbed714 |
0:d616ece2d859
|
1154
|
}
|
| mbed714 |
0:d616ece2d859
|
1155
|
|
| mbed714 |
0:d616ece2d859
|
1156
|
/* Need to move CI? */
|
| mbed714 |
0:d616ece2d859
|
1157
|
if (ucp != cip) {
|
| mbed714 |
0:d616ece2d859
|
1158
|
BCOPY(cip, ucp, cilen); /* Move it */
|
| mbed714 |
0:d616ece2d859
|
1159
|
}
|
| mbed714 |
0:d616ece2d859
|
1160
|
|
| mbed714 |
0:d616ece2d859
|
1161
|
/* Update output pointer */
|
| mbed714 |
0:d616ece2d859
|
1162
|
INCPTR(cilen, ucp);
|
| mbed714 |
0:d616ece2d859
|
1163
|
}
|
| mbed714 |
0:d616ece2d859
|
1164
|
|
| mbed714 |
0:d616ece2d859
|
1165
|
/*
|
| mbed714 |
0:d616ece2d859
|
1166
|
* If we aren't rejecting this packet, and we want to negotiate
|
| mbed714 |
0:d616ece2d859
|
1167
|
* their address, and they didn't send their address, then we
|
| mbed714 |
0:d616ece2d859
|
1168
|
* send a NAK with a CI_ADDR option appended. We assume the
|
| mbed714 |
0:d616ece2d859
|
1169
|
* input buffer is long enough that we can append the extra
|
| mbed714 |
0:d616ece2d859
|
1170
|
* option safely.
|
| mbed714 |
0:d616ece2d859
|
1171
|
*/
|
| mbed714 |
0:d616ece2d859
|
1172
|
if (rc != CONFREJ && !ho->neg_addr &&
|
| mbed714 |
0:d616ece2d859
|
1173
|
wo->req_addr && !reject_if_disagree) {
|
| mbed714 |
0:d616ece2d859
|
1174
|
IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Requesting peer address\n"));
|
| mbed714 |
0:d616ece2d859
|
1175
|
if (rc == CONFACK) {
|
| mbed714 |
0:d616ece2d859
|
1176
|
rc = CONFNAK;
|
| mbed714 |
0:d616ece2d859
|
1177
|
ucp = inp; /* reset pointer */
|
| mbed714 |
0:d616ece2d859
|
1178
|
wo->req_addr = 0; /* don't ask again */
|
| mbed714 |
0:d616ece2d859
|
1179
|
}
|
| mbed714 |
0:d616ece2d859
|
1180
|
PUTCHAR(CI_ADDR, ucp);
|
| mbed714 |
0:d616ece2d859
|
1181
|
PUTCHAR(CILEN_ADDR, ucp);
|
| mbed714 |
0:d616ece2d859
|
1182
|
tl = ntohl(wo->hisaddr);
|
| mbed714 |
0:d616ece2d859
|
1183
|
PUTLONG(tl, ucp);
|
| mbed714 |
0:d616ece2d859
|
1184
|
}
|
| mbed714 |
0:d616ece2d859
|
1185
|
|
| mbed714 |
0:d616ece2d859
|
1186
|
*len = (int)(ucp - inp); /* Compute output length */
|
| mbed714 |
0:d616ece2d859
|
1187
|
IPCPDEBUG(LOG_INFO, ("ipcp_reqci: returning Configure-%s\n", CODENAME(rc)));
|
| mbed714 |
0:d616ece2d859
|
1188
|
return (rc); /* Return final code */
|
| mbed714 |
0:d616ece2d859
|
1189
|
}
|
| mbed714 |
0:d616ece2d859
|
1190
|
|
| mbed714 |
0:d616ece2d859
|
1191
|
|
| mbed714 |
0:d616ece2d859
|
1192
|
#if 0
|
| mbed714 |
0:d616ece2d859
|
1193
|
/*
|
| mbed714 |
0:d616ece2d859
|
1194
|
* ip_check_options - check that any IP-related options are OK,
|
| mbed714 |
0:d616ece2d859
|
1195
|
* and assign appropriate defaults.
|
| mbed714 |
0:d616ece2d859
|
1196
|
*/
|
| mbed714 |
0:d616ece2d859
|
1197
|
static void
|
| mbed714 |
0:d616ece2d859
|
1198
|
ip_check_options(u_long localAddr)
|
| mbed714 |
0:d616ece2d859
|
1199
|
{
|
| mbed714 |
0:d616ece2d859
|
1200
|
ipcp_options *wo = &ipcp_wantoptions[0];
|
| mbed714 |
0:d616ece2d859
|
1201
|
|
| mbed714 |
0:d616ece2d859
|
1202
|
/*
|
| mbed714 |
0:d616ece2d859
|
1203
|
* Load our default IP address but allow the remote host to give us
|
| mbed714 |
0:d616ece2d859
|
1204
|
* a new address.
|
| mbed714 |
0:d616ece2d859
|
1205
|
*/
|
| mbed714 |
0:d616ece2d859
|
1206
|
if (wo->ouraddr == 0 && !ppp_settings.disable_defaultip) {
|
| mbed714 |
0:d616ece2d859
|
1207
|
wo->accept_local = 1; /* don't insist on this default value */
|
| mbed714 |
0:d616ece2d859
|
1208
|
wo->ouraddr = htonl(localAddr);
|
| mbed714 |
0:d616ece2d859
|
1209
|
}
|
| mbed714 |
0:d616ece2d859
|
1210
|
}
|
| mbed714 |
0:d616ece2d859
|
1211
|
#endif
|
| mbed714 |
0:d616ece2d859
|
1212
|
|
| mbed714 |
0:d616ece2d859
|
1213
|
|
| mbed714 |
0:d616ece2d859
|
1214
|
/*
|
| mbed714 |
0:d616ece2d859
|
1215
|
* ipcp_up - IPCP has come UP.
|
| mbed714 |
0:d616ece2d859
|
1216
|
*
|
| mbed714 |
0:d616ece2d859
|
1217
|
* Configure the IP network interface appropriately and bring it up.
|
| mbed714 |
0:d616ece2d859
|
1218
|
*/
|
| mbed714 |
0:d616ece2d859
|
1219
|
static void
|
| mbed714 |
0:d616ece2d859
|
1220
|
ipcp_up(fsm *f)
|
| mbed714 |
0:d616ece2d859
|
1221
|
{
|
| mbed714 |
0:d616ece2d859
|
1222
|
u32_t mask;
|
| mbed714 |
0:d616ece2d859
|
1223
|
ipcp_options *ho = &ipcp_hisoptions[f->unit];
|
| mbed714 |
0:d616ece2d859
|
1224
|
ipcp_options *go = &ipcp_gotoptions[f->unit];
|
| mbed714 |
0:d616ece2d859
|
1225
|
ipcp_options *wo = &ipcp_wantoptions[f->unit];
|
| mbed714 |
0:d616ece2d859
|
1226
|
|
| mbed714 |
0:d616ece2d859
|
1227
|
np_up(f->unit, PPP_IP);
|
| mbed714 |
0:d616ece2d859
|
1228
|
IPCPDEBUG(LOG_INFO, ("ipcp: up\n"));
|
| mbed714 |
0:d616ece2d859
|
1229
|
|
| mbed714 |
0:d616ece2d859
|
1230
|
/*
|
| mbed714 |
0:d616ece2d859
|
1231
|
* We must have a non-zero IP address for both ends of the link.
|
| mbed714 |
0:d616ece2d859
|
1232
|
*/
|
| mbed714 |
0:d616ece2d859
|
1233
|
if (!ho->neg_addr) {
|
| mbed714 |
0:d616ece2d859
|
1234
|
ho->hisaddr = wo->hisaddr;
|
| mbed714 |
0:d616ece2d859
|
1235
|
}
|
| mbed714 |
0:d616ece2d859
|
1236
|
#ifdef __PPP_STRICT_IMPL__ //DG : Kludge for bad 3g providers PPP impl
|
| mbed714 |
0:d616ece2d859
|
1237
|
if (ho->hisaddr == 0) {
|
| mbed714 |
0:d616ece2d859
|
1238
|
IPCPDEBUG(LOG_ERR, ("Could not determine remote IP address\n"));
|
| mbed714 |
0:d616ece2d859
|
1239
|
ipcp_close(f->unit, "Could not determine remote IP address");
|
| mbed714 |
0:d616ece2d859
|
1240
|
return;
|
| mbed714 |
0:d616ece2d859
|
1241
|
}
|
| mbed714 |
0:d616ece2d859
|
1242
|
#endif
|
| mbed714 |
0:d616ece2d859
|
1243
|
if (go->ouraddr == 0) {
|
| mbed714 |
0:d616ece2d859
|
1244
|
IPCPDEBUG(LOG_ERR, ("Could not determine local IP address\n"));
|
| mbed714 |
0:d616ece2d859
|
1245
|
ipcp_close(f->unit, "Could not determine local IP address");
|
| mbed714 |
0:d616ece2d859
|
1246
|
return;
|
| mbed714 |
0:d616ece2d859
|
1247
|
}
|
| mbed714 |
0:d616ece2d859
|
1248
|
|
| mbed714 |
0:d616ece2d859
|
1249
|
if (ppp_settings.usepeerdns && (go->dnsaddr[0] || go->dnsaddr[1])) {
|
| mbed714 |
0:d616ece2d859
|
1250
|
/*pppGotDNSAddrs(go->dnsaddr[0], go->dnsaddr[1]);*/
|
| mbed714 |
0:d616ece2d859
|
1251
|
}
|
| mbed714 |
0:d616ece2d859
|
1252
|
|
| mbed714 |
0:d616ece2d859
|
1253
|
/*
|
| mbed714 |
0:d616ece2d859
|
1254
|
* Check that the peer is allowed to use the IP address it wants.
|
| mbed714 |
0:d616ece2d859
|
1255
|
*/
|
| mbed714 |
0:d616ece2d859
|
1256
|
if (!auth_ip_addr(f->unit, ho->hisaddr)) {
|
| mbed714 |
0:d616ece2d859
|
1257
|
IPCPDEBUG(LOG_ERR, ("Peer is not authorized to use remote address %s\n",
|
| mbed714 |
0:d616ece2d859
|
1258
|
inet_ntoa(ho->hisaddr)));
|
| mbed714 |
0:d616ece2d859
|
1259
|
ipcp_close(f->unit, "Unauthorized remote IP address");
|
| mbed714 |
0:d616ece2d859
|
1260
|
return;
|
| mbed714 |
0:d616ece2d859
|
1261
|
}
|
| mbed714 |
0:d616ece2d859
|
1262
|
|
| mbed714 |
0:d616ece2d859
|
1263
|
/* set tcp compression */
|
| mbed714 |
0:d616ece2d859
|
1264
|
sifvjcomp(f->unit, ho->neg_vj, ho->cflag, ho->maxslotindex);
|
| mbed714 |
0:d616ece2d859
|
1265
|
|
| mbed714 |
0:d616ece2d859
|
1266
|
/*
|
| mbed714 |
0:d616ece2d859
|
1267
|
* Set IP addresses and (if specified) netmask.
|
| mbed714 |
0:d616ece2d859
|
1268
|
*/
|
| mbed714 |
0:d616ece2d859
|
1269
|
mask = GetMask(go->ouraddr);
|
| mbed714 |
0:d616ece2d859
|
1270
|
|
| mbed714 |
0:d616ece2d859
|
1271
|
if (!sifaddr(f->unit, go->ouraddr, ho->hisaddr, mask, go->dnsaddr[0], go->dnsaddr[1])) {
|
| mbed714 |
0:d616ece2d859
|
1272
|
IPCPDEBUG(LOG_WARNING, ("sifaddr failed\n"));
|
| mbed714 |
0:d616ece2d859
|
1273
|
ipcp_close(f->unit, "Interface configuration failed");
|
| mbed714 |
0:d616ece2d859
|
1274
|
return;
|
| mbed714 |
0:d616ece2d859
|
1275
|
}
|
| mbed714 |
0:d616ece2d859
|
1276
|
|
| mbed714 |
0:d616ece2d859
|
1277
|
/* bring the interface up for IP */
|
| mbed714 |
0:d616ece2d859
|
1278
|
if (!sifup(f->unit)) {
|
| mbed714 |
0:d616ece2d859
|
1279
|
IPCPDEBUG(LOG_WARNING, ("sifup failed\n"));
|
| mbed714 |
0:d616ece2d859
|
1280
|
ipcp_close(f->unit, "Interface configuration failed");
|
| mbed714 |
0:d616ece2d859
|
1281
|
return;
|
| mbed714 |
0:d616ece2d859
|
1282
|
}
|
| mbed714 |
0:d616ece2d859
|
1283
|
|
| mbed714 |
0:d616ece2d859
|
1284
|
sifnpmode(f->unit, PPP_IP, NPMODE_PASS);
|
| mbed714 |
0:d616ece2d859
|
1285
|
|
| mbed714 |
0:d616ece2d859
|
1286
|
/* assign a default route through the interface if required */
|
| mbed714 |
0:d616ece2d859
|
1287
|
if (ipcp_wantoptions[f->unit].default_route) {
|
| mbed714 |
0:d616ece2d859
|
1288
|
if (sifdefaultroute(f->unit, go->ouraddr, ho->hisaddr)) {
|
| mbed714 |
0:d616ece2d859
|
1289
|
default_route_set[f->unit] = 1;
|
| mbed714 |
0:d616ece2d859
|
1290
|
}
|
| mbed714 |
0:d616ece2d859
|
1291
|
}
|
| mbed714 |
0:d616ece2d859
|
1292
|
|
| mbed714 |
0:d616ece2d859
|
1293
|
IPCPDEBUG(LOG_NOTICE, ("local IP address %s\n", inet_ntoa(go->ouraddr)));
|
| mbed714 |
0:d616ece2d859
|
1294
|
IPCPDEBUG(LOG_NOTICE, ("remote IP address %s\n", inet_ntoa(ho->hisaddr)));
|
| mbed714 |
0:d616ece2d859
|
1295
|
if (go->dnsaddr[0]) {
|
| mbed714 |
0:d616ece2d859
|
1296
|
IPCPDEBUG(LOG_NOTICE, ("primary DNS address %s\n", inet_ntoa(go->dnsaddr[0])));
|
| mbed714 |
0:d616ece2d859
|
1297
|
}
|
| mbed714 |
0:d616ece2d859
|
1298
|
if (go->dnsaddr[1]) {
|
| mbed714 |
0:d616ece2d859
|
1299
|
IPCPDEBUG(LOG_NOTICE, ("secondary DNS address %s\n", inet_ntoa(go->dnsaddr[1])));
|
| mbed714 |
0:d616ece2d859
|
1300
|
}
|
| mbed714 |
0:d616ece2d859
|
1301
|
}
|
| mbed714 |
0:d616ece2d859
|
1302
|
|
| mbed714 |
0:d616ece2d859
|
1303
|
|
| mbed714 |
0:d616ece2d859
|
1304
|
/*
|
| mbed714 |
0:d616ece2d859
|
1305
|
* ipcp_down - IPCP has gone DOWN.
|
| mbed714 |
0:d616ece2d859
|
1306
|
*
|
| mbed714 |
0:d616ece2d859
|
1307
|
* Take the IP network interface down, clear its addresses
|
| mbed714 |
0:d616ece2d859
|
1308
|
* and delete routes through it.
|
| mbed714 |
0:d616ece2d859
|
1309
|
*/
|
| mbed714 |
0:d616ece2d859
|
1310
|
static void
|
| mbed714 |
0:d616ece2d859
|
1311
|
ipcp_down(fsm *f)
|
| mbed714 |
0:d616ece2d859
|
1312
|
{
|
| mbed714 |
0:d616ece2d859
|
1313
|
IPCPDEBUG(LOG_INFO, ("ipcp: down\n"));
|
| mbed714 |
0:d616ece2d859
|
1314
|
np_down(f->unit, PPP_IP);
|
| mbed714 |
0:d616ece2d859
|
1315
|
sifvjcomp(f->unit, 0, 0, 0);
|
| mbed714 |
0:d616ece2d859
|
1316
|
|
| mbed714 |
0:d616ece2d859
|
1317
|
sifdown(f->unit);
|
| mbed714 |
0:d616ece2d859
|
1318
|
ipcp_clear_addrs(f->unit);
|
| mbed714 |
0:d616ece2d859
|
1319
|
}
|
| mbed714 |
0:d616ece2d859
|
1320
|
|
| mbed714 |
0:d616ece2d859
|
1321
|
|
| mbed714 |
0:d616ece2d859
|
1322
|
/*
|
| mbed714 |
0:d616ece2d859
|
1323
|
* ipcp_clear_addrs() - clear the interface addresses, routes, etc.
|
| mbed714 |
0:d616ece2d859
|
1324
|
*/
|
| mbed714 |
0:d616ece2d859
|
1325
|
static void
|
| mbed714 |
0:d616ece2d859
|
1326
|
ipcp_clear_addrs(int unit)
|
| mbed714 |
0:d616ece2d859
|
1327
|
{
|
| mbed714 |
0:d616ece2d859
|
1328
|
u32_t ouraddr, hisaddr;
|
| mbed714 |
0:d616ece2d859
|
1329
|
|
| mbed714 |
0:d616ece2d859
|
1330
|
ouraddr = ipcp_gotoptions[unit].ouraddr;
|
| mbed714 |
0:d616ece2d859
|
1331
|
hisaddr = ipcp_hisoptions[unit].hisaddr;
|
| mbed714 |
0:d616ece2d859
|
1332
|
if (default_route_set[unit]) {
|
| mbed714 |
0:d616ece2d859
|
1333
|
cifdefaultroute(unit, ouraddr, hisaddr);
|
| mbed714 |
0:d616ece2d859
|
1334
|
default_route_set[unit] = 0;
|
| mbed714 |
0:d616ece2d859
|
1335
|
}
|
| mbed714 |
0:d616ece2d859
|
1336
|
cifaddr(unit, ouraddr, hisaddr);
|
| mbed714 |
0:d616ece2d859
|
1337
|
}
|
| mbed714 |
0:d616ece2d859
|
1338
|
|
| mbed714 |
0:d616ece2d859
|
1339
|
|
| mbed714 |
0:d616ece2d859
|
1340
|
/*
|
| mbed714 |
0:d616ece2d859
|
1341
|
* ipcp_finished - possibly shut down the lower layers.
|
| mbed714 |
0:d616ece2d859
|
1342
|
*/
|
| mbed714 |
0:d616ece2d859
|
1343
|
static void
|
| mbed714 |
0:d616ece2d859
|
1344
|
ipcp_finished(fsm *f)
|
| mbed714 |
0:d616ece2d859
|
1345
|
{
|
| mbed714 |
0:d616ece2d859
|
1346
|
np_finished(f->unit, PPP_IP);
|
| mbed714 |
0:d616ece2d859
|
1347
|
}
|
| mbed714 |
0:d616ece2d859
|
1348
|
|
| mbed714 |
0:d616ece2d859
|
1349
|
#if PPP_ADDITIONAL_CALLBACKS
|
| mbed714 |
0:d616ece2d859
|
1350
|
static int
|
| mbed714 |
0:d616ece2d859
|
1351
|
ipcp_printpkt(u_char *p, int plen, void (*printer) (void *, char *, ...), void *arg)
|
| mbed714 |
0:d616ece2d859
|
1352
|
{
|
| mbed714 |
0:d616ece2d859
|
1353
|
LWIP_UNUSED_ARG(p);
|
| mbed714 |
0:d616ece2d859
|
1354
|
LWIP_UNUSED_ARG(plen);
|
| mbed714 |
0:d616ece2d859
|
1355
|
LWIP_UNUSED_ARG(printer);
|
| mbed714 |
0:d616ece2d859
|
1356
|
LWIP_UNUSED_ARG(arg);
|
| mbed714 |
0:d616ece2d859
|
1357
|
return 0;
|
| mbed714 |
0:d616ece2d859
|
1358
|
}
|
| mbed714 |
0:d616ece2d859
|
1359
|
|
| mbed714 |
0:d616ece2d859
|
1360
|
/*
|
| mbed714 |
0:d616ece2d859
|
1361
|
* ip_active_pkt - see if this IP packet is worth bringing the link up for.
|
| mbed714 |
0:d616ece2d859
|
1362
|
* We don't bring the link up for IP fragments or for TCP FIN packets
|
| mbed714 |
0:d616ece2d859
|
1363
|
* with no data.
|
| mbed714 |
0:d616ece2d859
|
1364
|
*/
|
| mbed714 |
0:d616ece2d859
|
1365
|
#define IP_HDRLEN 20 /* bytes */
|
| mbed714 |
0:d616ece2d859
|
1366
|
#define IP_OFFMASK 0x1fff
|
| mbed714 |
0:d616ece2d859
|
1367
|
#define IPPROTO_TCP 6
|
| mbed714 |
0:d616ece2d859
|
1368
|
#define TCP_HDRLEN 20
|
| mbed714 |
0:d616ece2d859
|
1369
|
#define TH_FIN 0x01
|
| mbed714 |
0:d616ece2d859
|
1370
|
|
| mbed714 |
0:d616ece2d859
|
1371
|
/*
|
| mbed714 |
0:d616ece2d859
|
1372
|
* We use these macros because the IP header may be at an odd address,
|
| mbed714 |
0:d616ece2d859
|
1373
|
* and some compilers might use word loads to get th_off or ip_hl.
|
| mbed714 |
0:d616ece2d859
|
1374
|
*/
|
| mbed714 |
0:d616ece2d859
|
1375
|
|
| mbed714 |
0:d616ece2d859
|
1376
|
#define net_short(x) (((x)[0] << 8) + (x)[1])
|
| mbed714 |
0:d616ece2d859
|
1377
|
#define get_iphl(x) (((unsigned char *)(x))[0] & 0xF)
|
| mbed714 |
0:d616ece2d859
|
1378
|
#define get_ipoff(x) net_short((unsigned char *)(x) + 6)
|
| mbed714 |
0:d616ece2d859
|
1379
|
#define get_ipproto(x) (((unsigned char *)(x))[9])
|
| mbed714 |
0:d616ece2d859
|
1380
|
#define get_tcpoff(x) (((unsigned char *)(x))[12] >> 4)
|
| mbed714 |
0:d616ece2d859
|
1381
|
#define get_tcpflags(x) (((unsigned char *)(x))[13])
|
| mbed714 |
0:d616ece2d859
|
1382
|
|
| mbed714 |
0:d616ece2d859
|
1383
|
static int
|
| mbed714 |
0:d616ece2d859
|
1384
|
ip_active_pkt(u_char *pkt, int len)
|
| mbed714 |
0:d616ece2d859
|
1385
|
{
|
| mbed714 |
0:d616ece2d859
|
1386
|
u_char *tcp;
|
| mbed714 |
0:d616ece2d859
|
1387
|
int hlen;
|
| mbed714 |
0:d616ece2d859
|
1388
|
|
| mbed714 |
0:d616ece2d859
|
1389
|
len -= PPP_HDRLEN;
|
| mbed714 |
0:d616ece2d859
|
1390
|
pkt += PPP_HDRLEN;
|
| mbed714 |
0:d616ece2d859
|
1391
|
if (len < IP_HDRLEN) {
|
| mbed714 |
0:d616ece2d859
|
1392
|
return 0;
|
| mbed714 |
0:d616ece2d859
|
1393
|
}
|
| mbed714 |
0:d616ece2d859
|
1394
|
if ((get_ipoff(pkt) & IP_OFFMASK) != 0) {
|
| mbed714 |
0:d616ece2d859
|
1395
|
return 0;
|
| mbed714 |
0:d616ece2d859
|
1396
|
}
|
| mbed714 |
0:d616ece2d859
|
1397
|
if (get_ipproto(pkt) != IPPROTO_TCP) {
|
| mbed714 |
0:d616ece2d859
|
1398
|
return 1;
|
| mbed714 |
0:d616ece2d859
|
1399
|
}
|
| mbed714 |
0:d616ece2d859
|
1400
|
hlen = get_iphl(pkt) * 4;
|
| mbed714 |
0:d616ece2d859
|
1401
|
if (len < hlen + TCP_HDRLEN) {
|
| mbed714 |
0:d616ece2d859
|
1402
|
return 0;
|
| mbed714 |
0:d616ece2d859
|
1403
|
}
|
| mbed714 |
0:d616ece2d859
|
1404
|
tcp = pkt + hlen;
|
| mbed714 |
0:d616ece2d859
|
1405
|
if ((get_tcpflags(tcp) & TH_FIN) != 0 && len == hlen + get_tcpoff(tcp) * 4) {
|
| mbed714 |
0:d616ece2d859
|
1406
|
return 0;
|
| mbed714 |
0:d616ece2d859
|
1407
|
}
|
| mbed714 |
0:d616ece2d859
|
1408
|
return 1;
|
| mbed714 |
0:d616ece2d859
|
1409
|
}
|
| mbed714 |
0:d616ece2d859
|
1410
|
#endif /* PPP_ADDITIONAL_CALLBACKS */
|
| mbed714 |
0:d616ece2d859
|
1411
|
|
| mbed714 |
0:d616ece2d859
|
1412
|
#endif /* PPP_SUPPORT */
|
Daniel Peter