Michael Spencer / Mbed 2 deprecated LaOS

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Dependencies:   mbed

NetServices/lwip/netif/ppp/ipcp.c@1:f5ac63519541, 2014-03-05 (annotated)

Committer:
Michael J. Spencer
Date:
Wed Mar 05 06:14:02 2014 -0800
Revision:
1:f5ac63519541
Initial commit.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Michael J. Spencer 1:f5ac63519541 1 /** In contrast to pppd 2.3.1, DNS support has been added, proxy-ARP and
Michael J. Spencer 1:f5ac63519541 2 dial-on-demand has been stripped. */
Michael J. Spencer 1:f5ac63519541 3 /*****************************************************************************
Michael J. Spencer 1:f5ac63519541 4 * ipcp.c - Network PPP IP Control Protocol program file.
Michael J. Spencer 1:f5ac63519541 5 *
Michael J. Spencer 1:f5ac63519541 6 * Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
Michael J. Spencer 1:f5ac63519541 7 * portions Copyright (c) 1997 by Global Election Systems Inc.
Michael J. Spencer 1:f5ac63519541 8 *
Michael J. Spencer 1:f5ac63519541 9 * The authors hereby grant permission to use, copy, modify, distribute,
Michael J. Spencer 1:f5ac63519541 10 * and license this software and its documentation for any purpose, provided
Michael J. Spencer 1:f5ac63519541 11 * that existing copyright notices are retained in all copies and that this
Michael J. Spencer 1:f5ac63519541 12 * notice and the following disclaimer are included verbatim in any
Michael J. Spencer 1:f5ac63519541 13 * distributions. No written agreement, license, or royalty fee is required
Michael J. Spencer 1:f5ac63519541 14 * for any of the authorized uses.
Michael J. Spencer 1:f5ac63519541 15 *
Michael J. Spencer 1:f5ac63519541 16 * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
Michael J. Spencer 1:f5ac63519541 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
Michael J. Spencer 1:f5ac63519541 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
Michael J. Spencer 1:f5ac63519541 19 * IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
Michael J. Spencer 1:f5ac63519541 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
Michael J. Spencer 1:f5ac63519541 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
Michael J. Spencer 1:f5ac63519541 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
Michael J. Spencer 1:f5ac63519541 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
Michael J. Spencer 1:f5ac63519541 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
Michael J. Spencer 1:f5ac63519541 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Michael J. Spencer 1:f5ac63519541 26 *
Michael J. Spencer 1:f5ac63519541 27 ******************************************************************************
Michael J. Spencer 1:f5ac63519541 28 * REVISION HISTORY
Michael J. Spencer 1:f5ac63519541 29 *
Michael J. Spencer 1:f5ac63519541 30 * 03-01-01 Marc Boucher <marc@mbsi.ca>
Michael J. Spencer 1:f5ac63519541 31 * Ported to lwIP.
Michael J. Spencer 1:f5ac63519541 32 * 97-12-08 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
Michael J. Spencer 1:f5ac63519541 33 * Original.
Michael J. Spencer 1:f5ac63519541 34 *****************************************************************************/
Michael J. Spencer 1:f5ac63519541 35 /*
Michael J. Spencer 1:f5ac63519541 36 * ipcp.c - PPP IP Control Protocol.
Michael J. Spencer 1:f5ac63519541 37 *
Michael J. Spencer 1:f5ac63519541 38 * Copyright (c) 1989 Carnegie Mellon University.
Michael J. Spencer 1:f5ac63519541 39 * All rights reserved.
Michael J. Spencer 1:f5ac63519541 40 *
Michael J. Spencer 1:f5ac63519541 41 * Redistribution and use in source and binary forms are permitted
Michael J. Spencer 1:f5ac63519541 42 * provided that the above copyright notice and this paragraph are
Michael J. Spencer 1:f5ac63519541 43 * duplicated in all such forms and that any documentation,
Michael J. Spencer 1:f5ac63519541 44 * advertising materials, and other materials related to such
Michael J. Spencer 1:f5ac63519541 45 * distribution and use acknowledge that the software was developed
Michael J. Spencer 1:f5ac63519541 46 * by Carnegie Mellon University. The name of the
Michael J. Spencer 1:f5ac63519541 47 * University may not be used to endorse or promote products derived
Michael J. Spencer 1:f5ac63519541 48 * from this software without specific prior written permission.
Michael J. Spencer 1:f5ac63519541 49 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
Michael J. Spencer 1:f5ac63519541 50 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
Michael J. Spencer 1:f5ac63519541 51 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
Michael J. Spencer 1:f5ac63519541 52 */
Michael J. Spencer 1:f5ac63519541 53
Michael J. Spencer 1:f5ac63519541 54 #include "lwip/opt.h"
Michael J. Spencer 1:f5ac63519541 55
Michael J. Spencer 1:f5ac63519541 56 #if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
Michael J. Spencer 1:f5ac63519541 57
Michael J. Spencer 1:f5ac63519541 58 #include "ppp.h"
Michael J. Spencer 1:f5ac63519541 59 #include "pppdebug.h"
Michael J. Spencer 1:f5ac63519541 60
Michael J. Spencer 1:f5ac63519541 61 #include "auth.h"
Michael J. Spencer 1:f5ac63519541 62 #include "fsm.h"
Michael J. Spencer 1:f5ac63519541 63 #include "vj.h"
Michael J. Spencer 1:f5ac63519541 64 #include "ipcp.h"
Michael J. Spencer 1:f5ac63519541 65
Michael J. Spencer 1:f5ac63519541 66 #include "lwip/inet.h"
Michael J. Spencer 1:f5ac63519541 67
Michael J. Spencer 1:f5ac63519541 68 #include <string.h>
Michael J. Spencer 1:f5ac63519541 69
Michael J. Spencer 1:f5ac63519541 70 /* #define OLD_CI_ADDRS 1 */ /* Support deprecated address negotiation. */
Michael J. Spencer 1:f5ac63519541 71
Michael J. Spencer 1:f5ac63519541 72 /* global vars */
Michael J. Spencer 1:f5ac63519541 73 ipcp_options ipcp_wantoptions[NUM_PPP]; /* Options that we want to request */
Michael J. Spencer 1:f5ac63519541 74 ipcp_options ipcp_gotoptions[NUM_PPP]; /* Options that peer ack'd */
Michael J. Spencer 1:f5ac63519541 75 ipcp_options ipcp_allowoptions[NUM_PPP]; /* Options we allow peer to request */
Michael J. Spencer 1:f5ac63519541 76 ipcp_options ipcp_hisoptions[NUM_PPP]; /* Options that we ack'd */
Michael J. Spencer 1:f5ac63519541 77
Michael J. Spencer 1:f5ac63519541 78 /* local vars */
Michael J. Spencer 1:f5ac63519541 79 static int default_route_set[NUM_PPP]; /* Have set up a default route */
Michael J. Spencer 1:f5ac63519541 80 static int cis_received[NUM_PPP]; /* # Conf-Reqs received */
Michael J. Spencer 1:f5ac63519541 81
Michael J. Spencer 1:f5ac63519541 82
Michael J. Spencer 1:f5ac63519541 83 /*
Michael J. Spencer 1:f5ac63519541 84 * Callbacks for fsm code. (CI = Configuration Information)
Michael J. Spencer 1:f5ac63519541 85 */
Michael J. Spencer 1:f5ac63519541 86 static void ipcp_resetci (fsm *); /* Reset our CI */
Michael J. Spencer 1:f5ac63519541 87 static int ipcp_cilen (fsm *); /* Return length of our CI */
Michael J. Spencer 1:f5ac63519541 88 static void ipcp_addci (fsm *, u_char *, int *); /* Add our CI */
Michael J. Spencer 1:f5ac63519541 89 static int ipcp_ackci (fsm *, u_char *, int); /* Peer ack'd our CI */
Michael J. Spencer 1:f5ac63519541 90 static int ipcp_nakci (fsm *, u_char *, int); /* Peer nak'd our CI */
Michael J. Spencer 1:f5ac63519541 91 static int ipcp_rejci (fsm *, u_char *, int); /* Peer rej'd our CI */
Michael J. Spencer 1:f5ac63519541 92 static int ipcp_reqci (fsm *, u_char *, int *, int); /* Rcv CI */
Michael J. Spencer 1:f5ac63519541 93 static void ipcp_up (fsm *); /* We're UP */
Michael J. Spencer 1:f5ac63519541 94 static void ipcp_down (fsm *); /* We're DOWN */
Michael J. Spencer 1:f5ac63519541 95 #if PPP_ADDITIONAL_CALLBACKS
Michael J. Spencer 1:f5ac63519541 96 static void ipcp_script (fsm *, char *); /* Run an up/down script */
Michael J. Spencer 1:f5ac63519541 97 #endif
Michael J. Spencer 1:f5ac63519541 98 static void ipcp_finished (fsm *); /* Don't need lower layer */
Michael J. Spencer 1:f5ac63519541 99
Michael J. Spencer 1:f5ac63519541 100
Michael J. Spencer 1:f5ac63519541 101 fsm ipcp_fsm[NUM_PPP]; /* IPCP fsm structure */
Michael J. Spencer 1:f5ac63519541 102
Michael J. Spencer 1:f5ac63519541 103
Michael J. Spencer 1:f5ac63519541 104 static fsm_callbacks ipcp_callbacks = { /* IPCP callback routines */
Michael J. Spencer 1:f5ac63519541 105 ipcp_resetci, /* Reset our Configuration Information */
Michael J. Spencer 1:f5ac63519541 106 ipcp_cilen, /* Length of our Configuration Information */
Michael J. Spencer 1:f5ac63519541 107 ipcp_addci, /* Add our Configuration Information */
Michael J. Spencer 1:f5ac63519541 108 ipcp_ackci, /* ACK our Configuration Information */
Michael J. Spencer 1:f5ac63519541 109 ipcp_nakci, /* NAK our Configuration Information */
Michael J. Spencer 1:f5ac63519541 110 ipcp_rejci, /* Reject our Configuration Information */
Michael J. Spencer 1:f5ac63519541 111 ipcp_reqci, /* Request peer's Configuration Information */
Michael J. Spencer 1:f5ac63519541 112 ipcp_up, /* Called when fsm reaches LS_OPENED state */
Michael J. Spencer 1:f5ac63519541 113 ipcp_down, /* Called when fsm leaves LS_OPENED state */
Michael J. Spencer 1:f5ac63519541 114 NULL, /* Called when we want the lower layer up */
Michael J. Spencer 1:f5ac63519541 115 ipcp_finished, /* Called when we want the lower layer down */
Michael J. Spencer 1:f5ac63519541 116 NULL, /* Called when Protocol-Reject received */
Michael J. Spencer 1:f5ac63519541 117 NULL, /* Retransmission is necessary */
Michael J. Spencer 1:f5ac63519541 118 NULL, /* Called to handle protocol-specific codes */
Michael J. Spencer 1:f5ac63519541 119 "IPCP" /* String name of protocol */
Michael J. Spencer 1:f5ac63519541 120 };
Michael J. Spencer 1:f5ac63519541 121
Michael J. Spencer 1:f5ac63519541 122 /*
Michael J. Spencer 1:f5ac63519541 123 * Protocol entry points from main code.
Michael J. Spencer 1:f5ac63519541 124 */
Michael J. Spencer 1:f5ac63519541 125 static void ipcp_init (int);
Michael J. Spencer 1:f5ac63519541 126 static void ipcp_open (int);
Michael J. Spencer 1:f5ac63519541 127 static void ipcp_close (int, char *);
Michael J. Spencer 1:f5ac63519541 128 static void ipcp_lowerup (int);
Michael J. Spencer 1:f5ac63519541 129 static void ipcp_lowerdown (int);
Michael J. Spencer 1:f5ac63519541 130 static void ipcp_input (int, u_char *, int);
Michael J. Spencer 1:f5ac63519541 131 static void ipcp_protrej (int);
Michael J. Spencer 1:f5ac63519541 132
Michael J. Spencer 1:f5ac63519541 133
Michael J. Spencer 1:f5ac63519541 134 struct protent ipcp_protent = {
Michael J. Spencer 1:f5ac63519541 135 PPP_IPCP,
Michael J. Spencer 1:f5ac63519541 136 ipcp_init,
Michael J. Spencer 1:f5ac63519541 137 ipcp_input,
Michael J. Spencer 1:f5ac63519541 138 ipcp_protrej,
Michael J. Spencer 1:f5ac63519541 139 ipcp_lowerup,
Michael J. Spencer 1:f5ac63519541 140 ipcp_lowerdown,
Michael J. Spencer 1:f5ac63519541 141 ipcp_open,
Michael J. Spencer 1:f5ac63519541 142 ipcp_close,
Michael J. Spencer 1:f5ac63519541 143 #if PPP_ADDITIONAL_CALLBACKS
Michael J. Spencer 1:f5ac63519541 144 ipcp_printpkt,
Michael J. Spencer 1:f5ac63519541 145 NULL,
Michael J. Spencer 1:f5ac63519541 146 #endif /* PPP_ADDITIONAL_CALLBACKS */
Michael J. Spencer 1:f5ac63519541 147 1,
Michael J. Spencer 1:f5ac63519541 148 "IPCP",
Michael J. Spencer 1:f5ac63519541 149 #if PPP_ADDITIONAL_CALLBACKS
Michael J. Spencer 1:f5ac63519541 150 ip_check_options,
Michael J. Spencer 1:f5ac63519541 151 NULL,
Michael J. Spencer 1:f5ac63519541 152 ip_active_pkt
Michael J. Spencer 1:f5ac63519541 153 #endif /* PPP_ADDITIONAL_CALLBACKS */
Michael J. Spencer 1:f5ac63519541 154 };
Michael J. Spencer 1:f5ac63519541 155
Michael J. Spencer 1:f5ac63519541 156 static void ipcp_clear_addrs (int);
Michael J. Spencer 1:f5ac63519541 157
Michael J. Spencer 1:f5ac63519541 158 /*
Michael J. Spencer 1:f5ac63519541 159 * Lengths of configuration options.
Michael J. Spencer 1:f5ac63519541 160 */
Michael J. Spencer 1:f5ac63519541 161 #define CILEN_VOID 2
Michael J. Spencer 1:f5ac63519541 162 #define CILEN_COMPRESS 4 /* min length for compression protocol opt. */
Michael J. Spencer 1:f5ac63519541 163 #define CILEN_VJ 6 /* length for RFC1332 Van-Jacobson opt. */
Michael J. Spencer 1:f5ac63519541 164 #define CILEN_ADDR 6 /* new-style single address option */
Michael J. Spencer 1:f5ac63519541 165 #define CILEN_ADDRS 10 /* old-style dual address option */
Michael J. Spencer 1:f5ac63519541 166
Michael J. Spencer 1:f5ac63519541 167
Michael J. Spencer 1:f5ac63519541 168 #define CODENAME(x) ((x) == CONFACK ? "ACK" : \
Michael J. Spencer 1:f5ac63519541 169 (x) == CONFNAK ? "NAK" : "REJ")
Michael J. Spencer 1:f5ac63519541 170
Michael J. Spencer 1:f5ac63519541 171
Michael J. Spencer 1:f5ac63519541 172 /*
Michael J. Spencer 1:f5ac63519541 173 * ipcp_init - Initialize IPCP.
Michael J. Spencer 1:f5ac63519541 174 */
Michael J. Spencer 1:f5ac63519541 175 static void
Michael J. Spencer 1:f5ac63519541 176 ipcp_init(int unit)
Michael J. Spencer 1:f5ac63519541 177 {
Michael J. Spencer 1:f5ac63519541 178 fsm *f = &ipcp_fsm[unit];
Michael J. Spencer 1:f5ac63519541 179 ipcp_options *wo = &ipcp_wantoptions[unit];
Michael J. Spencer 1:f5ac63519541 180 ipcp_options *ao = &ipcp_allowoptions[unit];
Michael J. Spencer 1:f5ac63519541 181
Michael J. Spencer 1:f5ac63519541 182 f->unit = unit;
Michael J. Spencer 1:f5ac63519541 183 f->protocol = PPP_IPCP;
Michael J. Spencer 1:f5ac63519541 184 f->callbacks = &ipcp_callbacks;
Michael J. Spencer 1:f5ac63519541 185 fsm_init(&ipcp_fsm[unit]);
Michael J. Spencer 1:f5ac63519541 186
Michael J. Spencer 1:f5ac63519541 187 memset(wo, 0, sizeof(*wo));
Michael J. Spencer 1:f5ac63519541 188 memset(ao, 0, sizeof(*ao));
Michael J. Spencer 1:f5ac63519541 189
Michael J. Spencer 1:f5ac63519541 190 wo->neg_addr = 1;
Michael J. Spencer 1:f5ac63519541 191 wo->ouraddr = 0;
Michael J. Spencer 1:f5ac63519541 192 #if VJ_SUPPORT
Michael J. Spencer 1:f5ac63519541 193 wo->neg_vj = 1;
Michael J. Spencer 1:f5ac63519541 194 #else /* VJ_SUPPORT */
Michael J. Spencer 1:f5ac63519541 195 wo->neg_vj = 0;
Michael J. Spencer 1:f5ac63519541 196 #endif /* VJ_SUPPORT */
Michael J. Spencer 1:f5ac63519541 197 wo->vj_protocol = IPCP_VJ_COMP;
Michael J. Spencer 1:f5ac63519541 198 wo->maxslotindex = MAX_SLOTS - 1;
Michael J. Spencer 1:f5ac63519541 199 wo->cflag = 0;
Michael J. Spencer 1:f5ac63519541 200 wo->default_route = 1;
Michael J. Spencer 1:f5ac63519541 201
Michael J. Spencer 1:f5ac63519541 202 ao->neg_addr = 1;
Michael J. Spencer 1:f5ac63519541 203 #if VJ_SUPPORT
Michael J. Spencer 1:f5ac63519541 204 ao->neg_vj = 1;
Michael J. Spencer 1:f5ac63519541 205 #else /* VJ_SUPPORT */
Michael J. Spencer 1:f5ac63519541 206 ao->neg_vj = 0;
Michael J. Spencer 1:f5ac63519541 207 #endif /* VJ_SUPPORT */
Michael J. Spencer 1:f5ac63519541 208 ao->maxslotindex = MAX_SLOTS - 1;
Michael J. Spencer 1:f5ac63519541 209 ao->cflag = 1;
Michael J. Spencer 1:f5ac63519541 210 ao->default_route = 1;
Michael J. Spencer 1:f5ac63519541 211 }
Michael J. Spencer 1:f5ac63519541 212
Michael J. Spencer 1:f5ac63519541 213
Michael J. Spencer 1:f5ac63519541 214 /*
Michael J. Spencer 1:f5ac63519541 215 * ipcp_open - IPCP is allowed to come up.
Michael J. Spencer 1:f5ac63519541 216 */
Michael J. Spencer 1:f5ac63519541 217 static void
Michael J. Spencer 1:f5ac63519541 218 ipcp_open(int unit)
Michael J. Spencer 1:f5ac63519541 219 {
Michael J. Spencer 1:f5ac63519541 220 fsm_open(&ipcp_fsm[unit]);
Michael J. Spencer 1:f5ac63519541 221 }
Michael J. Spencer 1:f5ac63519541 222
Michael J. Spencer 1:f5ac63519541 223
Michael J. Spencer 1:f5ac63519541 224 /*
Michael J. Spencer 1:f5ac63519541 225 * ipcp_close - Take IPCP down.
Michael J. Spencer 1:f5ac63519541 226 */
Michael J. Spencer 1:f5ac63519541 227 static void
Michael J. Spencer 1:f5ac63519541 228 ipcp_close(int unit, char *reason)
Michael J. Spencer 1:f5ac63519541 229 {
Michael J. Spencer 1:f5ac63519541 230 fsm_close(&ipcp_fsm[unit], reason);
Michael J. Spencer 1:f5ac63519541 231 }
Michael J. Spencer 1:f5ac63519541 232
Michael J. Spencer 1:f5ac63519541 233
Michael J. Spencer 1:f5ac63519541 234 /*
Michael J. Spencer 1:f5ac63519541 235 * ipcp_lowerup - The lower layer is up.
Michael J. Spencer 1:f5ac63519541 236 */
Michael J. Spencer 1:f5ac63519541 237 static void
Michael J. Spencer 1:f5ac63519541 238 ipcp_lowerup(int unit)
Michael J. Spencer 1:f5ac63519541 239 {
Michael J. Spencer 1:f5ac63519541 240 fsm_lowerup(&ipcp_fsm[unit]);
Michael J. Spencer 1:f5ac63519541 241 }
Michael J. Spencer 1:f5ac63519541 242
Michael J. Spencer 1:f5ac63519541 243
Michael J. Spencer 1:f5ac63519541 244 /*
Michael J. Spencer 1:f5ac63519541 245 * ipcp_lowerdown - The lower layer is down.
Michael J. Spencer 1:f5ac63519541 246 */
Michael J. Spencer 1:f5ac63519541 247 static void
Michael J. Spencer 1:f5ac63519541 248 ipcp_lowerdown(int unit)
Michael J. Spencer 1:f5ac63519541 249 {
Michael J. Spencer 1:f5ac63519541 250 fsm_lowerdown(&ipcp_fsm[unit]);
Michael J. Spencer 1:f5ac63519541 251 }
Michael J. Spencer 1:f5ac63519541 252
Michael J. Spencer 1:f5ac63519541 253
Michael J. Spencer 1:f5ac63519541 254 /*
Michael J. Spencer 1:f5ac63519541 255 * ipcp_input - Input IPCP packet.
Michael J. Spencer 1:f5ac63519541 256 */
Michael J. Spencer 1:f5ac63519541 257 static void
Michael J. Spencer 1:f5ac63519541 258 ipcp_input(int unit, u_char *p, int len)
Michael J. Spencer 1:f5ac63519541 259 {
Michael J. Spencer 1:f5ac63519541 260 fsm_input(&ipcp_fsm[unit], p, len);
Michael J. Spencer 1:f5ac63519541 261 }
Michael J. Spencer 1:f5ac63519541 262
Michael J. Spencer 1:f5ac63519541 263
Michael J. Spencer 1:f5ac63519541 264 /*
Michael J. Spencer 1:f5ac63519541 265 * ipcp_protrej - A Protocol-Reject was received for IPCP.
Michael J. Spencer 1:f5ac63519541 266 *
Michael J. Spencer 1:f5ac63519541 267 * Pretend the lower layer went down, so we shut up.
Michael J. Spencer 1:f5ac63519541 268 */
Michael J. Spencer 1:f5ac63519541 269 static void
Michael J. Spencer 1:f5ac63519541 270 ipcp_protrej(int unit)
Michael J. Spencer 1:f5ac63519541 271 {
Michael J. Spencer 1:f5ac63519541 272 fsm_lowerdown(&ipcp_fsm[unit]);
Michael J. Spencer 1:f5ac63519541 273 }
Michael J. Spencer 1:f5ac63519541 274
Michael J. Spencer 1:f5ac63519541 275
Michael J. Spencer 1:f5ac63519541 276 /*
Michael J. Spencer 1:f5ac63519541 277 * ipcp_resetci - Reset our CI.
Michael J. Spencer 1:f5ac63519541 278 */
Michael J. Spencer 1:f5ac63519541 279 static void
Michael J. Spencer 1:f5ac63519541 280 ipcp_resetci(fsm *f)
Michael J. Spencer 1:f5ac63519541 281 {
Michael J. Spencer 1:f5ac63519541 282 ipcp_options *wo = &ipcp_wantoptions[f->unit];
Michael J. Spencer 1:f5ac63519541 283
Michael J. Spencer 1:f5ac63519541 284 wo->req_addr = wo->neg_addr && ipcp_allowoptions[f->unit].neg_addr;
Michael J. Spencer 1:f5ac63519541 285 if (wo->ouraddr == 0) {
Michael J. Spencer 1:f5ac63519541 286 wo->accept_local = 1;
Michael J. Spencer 1:f5ac63519541 287 }
Michael J. Spencer 1:f5ac63519541 288 if (wo->hisaddr == 0) {
Michael J. Spencer 1:f5ac63519541 289 wo->accept_remote = 1;
Michael J. Spencer 1:f5ac63519541 290 }
Michael J. Spencer 1:f5ac63519541 291 /* Request DNS addresses from the peer */
Michael J. Spencer 1:f5ac63519541 292 wo->req_dns1 = ppp_settings.usepeerdns;
Michael J. Spencer 1:f5ac63519541 293 wo->req_dns2 = ppp_settings.usepeerdns;
Michael J. Spencer 1:f5ac63519541 294 ipcp_gotoptions[f->unit] = *wo;
Michael J. Spencer 1:f5ac63519541 295 cis_received[f->unit] = 0;
Michael J. Spencer 1:f5ac63519541 296 }
Michael J. Spencer 1:f5ac63519541 297
Michael J. Spencer 1:f5ac63519541 298
Michael J. Spencer 1:f5ac63519541 299 /*
Michael J. Spencer 1:f5ac63519541 300 * ipcp_cilen - Return length of our CI.
Michael J. Spencer 1:f5ac63519541 301 */
Michael J. Spencer 1:f5ac63519541 302 static int
Michael J. Spencer 1:f5ac63519541 303 ipcp_cilen(fsm *f)
Michael J. Spencer 1:f5ac63519541 304 {
Michael J. Spencer 1:f5ac63519541 305 ipcp_options *go = &ipcp_gotoptions[f->unit];
Michael J. Spencer 1:f5ac63519541 306 ipcp_options *wo = &ipcp_wantoptions[f->unit];
Michael J. Spencer 1:f5ac63519541 307 ipcp_options *ho = &ipcp_hisoptions[f->unit];
Michael J. Spencer 1:f5ac63519541 308
Michael J. Spencer 1:f5ac63519541 309 #define LENCIVJ(neg, old) (neg ? (old? CILEN_COMPRESS : CILEN_VJ) : 0)
Michael J. Spencer 1:f5ac63519541 310 #define LENCIADDR(neg, old) (neg ? (old? CILEN_ADDRS : CILEN_ADDR) : 0)
Michael J. Spencer 1:f5ac63519541 311 #define LENCIDNS(neg) (neg ? (CILEN_ADDR) : 0)
Michael J. Spencer 1:f5ac63519541 312
Michael J. Spencer 1:f5ac63519541 313 /*
Michael J. Spencer 1:f5ac63519541 314 * First see if we want to change our options to the old
Michael J. Spencer 1:f5ac63519541 315 * forms because we have received old forms from the peer.
Michael J. Spencer 1:f5ac63519541 316 */
Michael J. Spencer 1:f5ac63519541 317 if (wo->neg_addr && !go->neg_addr && !go->old_addrs) {
Michael J. Spencer 1:f5ac63519541 318 /* use the old style of address negotiation */
Michael J. Spencer 1:f5ac63519541 319 go->neg_addr = 1;
Michael J. Spencer 1:f5ac63519541 320 go->old_addrs = 1;
Michael J. Spencer 1:f5ac63519541 321 }
Michael J. Spencer 1:f5ac63519541 322 if (wo->neg_vj && !go->neg_vj && !go->old_vj) {
Michael J. Spencer 1:f5ac63519541 323 /* try an older style of VJ negotiation */
Michael J. Spencer 1:f5ac63519541 324 if (cis_received[f->unit] == 0) {
Michael J. Spencer 1:f5ac63519541 325 /* keep trying the new style until we see some CI from the peer */
Michael J. Spencer 1:f5ac63519541 326 go->neg_vj = 1;
Michael J. Spencer 1:f5ac63519541 327 } else {
Michael J. Spencer 1:f5ac63519541 328 /* use the old style only if the peer did */
Michael J. Spencer 1:f5ac63519541 329 if (ho->neg_vj && ho->old_vj) {
Michael J. Spencer 1:f5ac63519541 330 go->neg_vj = 1;
Michael J. Spencer 1:f5ac63519541 331 go->old_vj = 1;
Michael J. Spencer 1:f5ac63519541 332 go->vj_protocol = ho->vj_protocol;
Michael J. Spencer 1:f5ac63519541 333 }
Michael J. Spencer 1:f5ac63519541 334 }
Michael J. Spencer 1:f5ac63519541 335 }
Michael J. Spencer 1:f5ac63519541 336
Michael J. Spencer 1:f5ac63519541 337 return (LENCIADDR(go->neg_addr, go->old_addrs) +
Michael J. Spencer 1:f5ac63519541 338 LENCIVJ(go->neg_vj, go->old_vj) +
Michael J. Spencer 1:f5ac63519541 339 LENCIDNS(go->req_dns1) +
Michael J. Spencer 1:f5ac63519541 340 LENCIDNS(go->req_dns2));
Michael J. Spencer 1:f5ac63519541 341 }
Michael J. Spencer 1:f5ac63519541 342
Michael J. Spencer 1:f5ac63519541 343
Michael J. Spencer 1:f5ac63519541 344 /*
Michael J. Spencer 1:f5ac63519541 345 * ipcp_addci - Add our desired CIs to a packet.
Michael J. Spencer 1:f5ac63519541 346 */
Michael J. Spencer 1:f5ac63519541 347 static void
Michael J. Spencer 1:f5ac63519541 348 ipcp_addci(fsm *f, u_char *ucp, int *lenp)
Michael J. Spencer 1:f5ac63519541 349 {
Michael J. Spencer 1:f5ac63519541 350 ipcp_options *go = &ipcp_gotoptions[f->unit];
Michael J. Spencer 1:f5ac63519541 351 int len = *lenp;
Michael J. Spencer 1:f5ac63519541 352
Michael J. Spencer 1:f5ac63519541 353 #define ADDCIVJ(opt, neg, val, old, maxslotindex, cflag) \
Michael J. Spencer 1:f5ac63519541 354 if (neg) { \
Michael J. Spencer 1:f5ac63519541 355 int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \
Michael J. Spencer 1:f5ac63519541 356 if (len >= vjlen) { \
Michael J. Spencer 1:f5ac63519541 357 PUTCHAR(opt, ucp); \
Michael J. Spencer 1:f5ac63519541 358 PUTCHAR(vjlen, ucp); \
Michael J. Spencer 1:f5ac63519541 359 PUTSHORT(val, ucp); \
Michael J. Spencer 1:f5ac63519541 360 if (!old) { \
Michael J. Spencer 1:f5ac63519541 361 PUTCHAR(maxslotindex, ucp); \
Michael J. Spencer 1:f5ac63519541 362 PUTCHAR(cflag, ucp); \
Michael J. Spencer 1:f5ac63519541 363 } \
Michael J. Spencer 1:f5ac63519541 364 len -= vjlen; \
Michael J. Spencer 1:f5ac63519541 365 } else { \
Michael J. Spencer 1:f5ac63519541 366 neg = 0; \
Michael J. Spencer 1:f5ac63519541 367 } \
Michael J. Spencer 1:f5ac63519541 368 }
Michael J. Spencer 1:f5ac63519541 369
Michael J. Spencer 1:f5ac63519541 370 #define ADDCIADDR(opt, neg, old, val1, val2) \
Michael J. Spencer 1:f5ac63519541 371 if (neg) { \
Michael J. Spencer 1:f5ac63519541 372 int addrlen = (old? CILEN_ADDRS: CILEN_ADDR); \
Michael J. Spencer 1:f5ac63519541 373 if (len >= addrlen) { \
Michael J. Spencer 1:f5ac63519541 374 u32_t l; \
Michael J. Spencer 1:f5ac63519541 375 PUTCHAR(opt, ucp); \
Michael J. Spencer 1:f5ac63519541 376 PUTCHAR(addrlen, ucp); \
Michael J. Spencer 1:f5ac63519541 377 l = ntohl(val1); \
Michael J. Spencer 1:f5ac63519541 378 PUTLONG(l, ucp); \
Michael J. Spencer 1:f5ac63519541 379 if (old) { \
Michael J. Spencer 1:f5ac63519541 380 l = ntohl(val2); \
Michael J. Spencer 1:f5ac63519541 381 PUTLONG(l, ucp); \
Michael J. Spencer 1:f5ac63519541 382 } \
Michael J. Spencer 1:f5ac63519541 383 len -= addrlen; \
Michael J. Spencer 1:f5ac63519541 384 } else { \
Michael J. Spencer 1:f5ac63519541 385 neg = 0; \
Michael J. Spencer 1:f5ac63519541 386 } \
Michael J. Spencer 1:f5ac63519541 387 }
Michael J. Spencer 1:f5ac63519541 388
Michael J. Spencer 1:f5ac63519541 389 #define ADDCIDNS(opt, neg, addr) \
Michael J. Spencer 1:f5ac63519541 390 if (neg) { \
Michael J. Spencer 1:f5ac63519541 391 if (len >= CILEN_ADDR) { \
Michael J. Spencer 1:f5ac63519541 392 u32_t l; \
Michael J. Spencer 1:f5ac63519541 393 PUTCHAR(opt, ucp); \
Michael J. Spencer 1:f5ac63519541 394 PUTCHAR(CILEN_ADDR, ucp); \
Michael J. Spencer 1:f5ac63519541 395 l = ntohl(addr); \
Michael J. Spencer 1:f5ac63519541 396 PUTLONG(l, ucp); \
Michael J. Spencer 1:f5ac63519541 397 len -= CILEN_ADDR; \
Michael J. Spencer 1:f5ac63519541 398 } else { \
Michael J. Spencer 1:f5ac63519541 399 neg = 0; \
Michael J. Spencer 1:f5ac63519541 400 } \
Michael J. Spencer 1:f5ac63519541 401 }
Michael J. Spencer 1:f5ac63519541 402
Michael J. Spencer 1:f5ac63519541 403 ADDCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), go->neg_addr,
Michael J. Spencer 1:f5ac63519541 404 go->old_addrs, go->ouraddr, go->hisaddr);
Michael J. Spencer 1:f5ac63519541 405
Michael J. Spencer 1:f5ac63519541 406 ADDCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj,
Michael J. Spencer 1:f5ac63519541 407 go->maxslotindex, go->cflag);
Michael J. Spencer 1:f5ac63519541 408
Michael J. Spencer 1:f5ac63519541 409 ADDCIDNS(CI_MS_DNS1, go->req_dns1, go->dnsaddr[0]);
Michael J. Spencer 1:f5ac63519541 410
Michael J. Spencer 1:f5ac63519541 411 ADDCIDNS(CI_MS_DNS2, go->req_dns2, go->dnsaddr[1]);
Michael J. Spencer 1:f5ac63519541 412
Michael J. Spencer 1:f5ac63519541 413 *lenp -= len;
Michael J. Spencer 1:f5ac63519541 414 }
Michael J. Spencer 1:f5ac63519541 415
Michael J. Spencer 1:f5ac63519541 416
Michael J. Spencer 1:f5ac63519541 417 /*
Michael J. Spencer 1:f5ac63519541 418 * ipcp_ackci - Ack our CIs.
Michael J. Spencer 1:f5ac63519541 419 *
Michael J. Spencer 1:f5ac63519541 420 * Returns:
Michael J. Spencer 1:f5ac63519541 421 * 0 - Ack was bad.
Michael J. Spencer 1:f5ac63519541 422 * 1 - Ack was good.
Michael J. Spencer 1:f5ac63519541 423 */
Michael J. Spencer 1:f5ac63519541 424 static int
Michael J. Spencer 1:f5ac63519541 425 ipcp_ackci(fsm *f, u_char *p, int len)
Michael J. Spencer 1:f5ac63519541 426 {
Michael J. Spencer 1:f5ac63519541 427 ipcp_options *go = &ipcp_gotoptions[f->unit];
Michael J. Spencer 1:f5ac63519541 428 u_short cilen, citype, cishort;
Michael J. Spencer 1:f5ac63519541 429 u32_t cilong;
Michael J. Spencer 1:f5ac63519541 430 u_char cimaxslotindex, cicflag;
Michael J. Spencer 1:f5ac63519541 431
Michael J. Spencer 1:f5ac63519541 432 /*
Michael J. Spencer 1:f5ac63519541 433 * CIs must be in exactly the same order that we sent...
Michael J. Spencer 1:f5ac63519541 434 * Check packet length and CI length at each step.
Michael J. Spencer 1:f5ac63519541 435 * If we find any deviations, then this packet is bad.
Michael J. Spencer 1:f5ac63519541 436 */
Michael J. Spencer 1:f5ac63519541 437
Michael J. Spencer 1:f5ac63519541 438 #define ACKCIVJ(opt, neg, val, old, maxslotindex, cflag) \
Michael J. Spencer 1:f5ac63519541 439 if (neg) { \
Michael J. Spencer 1:f5ac63519541 440 int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \
Michael J. Spencer 1:f5ac63519541 441 if ((len -= vjlen) < 0) { \
Michael J. Spencer 1:f5ac63519541 442 goto bad; \
Michael J. Spencer 1:f5ac63519541 443 } \
Michael J. Spencer 1:f5ac63519541 444 GETCHAR(citype, p); \
Michael J. Spencer 1:f5ac63519541 445 GETCHAR(cilen, p); \
Michael J. Spencer 1:f5ac63519541 446 if (cilen != vjlen || \
Michael J. Spencer 1:f5ac63519541 447 citype != opt) { \
Michael J. Spencer 1:f5ac63519541 448 goto bad; \
Michael J. Spencer 1:f5ac63519541 449 } \
Michael J. Spencer 1:f5ac63519541 450 GETSHORT(cishort, p); \
Michael J. Spencer 1:f5ac63519541 451 if (cishort != val) { \
Michael J. Spencer 1:f5ac63519541 452 goto bad; \
Michael J. Spencer 1:f5ac63519541 453 } \
Michael J. Spencer 1:f5ac63519541 454 if (!old) { \
Michael J. Spencer 1:f5ac63519541 455 GETCHAR(cimaxslotindex, p); \
Michael J. Spencer 1:f5ac63519541 456 if (cimaxslotindex != maxslotindex) { \
Michael J. Spencer 1:f5ac63519541 457 goto bad; \
Michael J. Spencer 1:f5ac63519541 458 } \
Michael J. Spencer 1:f5ac63519541 459 GETCHAR(cicflag, p); \
Michael J. Spencer 1:f5ac63519541 460 if (cicflag != cflag) { \
Michael J. Spencer 1:f5ac63519541 461 goto bad; \
Michael J. Spencer 1:f5ac63519541 462 } \
Michael J. Spencer 1:f5ac63519541 463 } \
Michael J. Spencer 1:f5ac63519541 464 }
Michael J. Spencer 1:f5ac63519541 465
Michael J. Spencer 1:f5ac63519541 466 #define ACKCIADDR(opt, neg, old, val1, val2) \
Michael J. Spencer 1:f5ac63519541 467 if (neg) { \
Michael J. Spencer 1:f5ac63519541 468 int addrlen = (old? CILEN_ADDRS: CILEN_ADDR); \
Michael J. Spencer 1:f5ac63519541 469 u32_t l; \
Michael J. Spencer 1:f5ac63519541 470 if ((len -= addrlen) < 0) { \
Michael J. Spencer 1:f5ac63519541 471 goto bad; \
Michael J. Spencer 1:f5ac63519541 472 } \
Michael J. Spencer 1:f5ac63519541 473 GETCHAR(citype, p); \
Michael J. Spencer 1:f5ac63519541 474 GETCHAR(cilen, p); \
Michael J. Spencer 1:f5ac63519541 475 if (cilen != addrlen || \
Michael J. Spencer 1:f5ac63519541 476 citype != opt) { \
Michael J. Spencer 1:f5ac63519541 477 goto bad; \
Michael J. Spencer 1:f5ac63519541 478 } \
Michael J. Spencer 1:f5ac63519541 479 GETLONG(l, p); \
Michael J. Spencer 1:f5ac63519541 480 cilong = htonl(l); \
Michael J. Spencer 1:f5ac63519541 481 if (val1 != cilong) { \
Michael J. Spencer 1:f5ac63519541 482 goto bad; \
Michael J. Spencer 1:f5ac63519541 483 } \
Michael J. Spencer 1:f5ac63519541 484 if (old) { \
Michael J. Spencer 1:f5ac63519541 485 GETLONG(l, p); \
Michael J. Spencer 1:f5ac63519541 486 cilong = htonl(l); \
Michael J. Spencer 1:f5ac63519541 487 if (val2 != cilong) { \
Michael J. Spencer 1:f5ac63519541 488 goto bad; \
Michael J. Spencer 1:f5ac63519541 489 } \
Michael J. Spencer 1:f5ac63519541 490 } \
Michael J. Spencer 1:f5ac63519541 491 }
Michael J. Spencer 1:f5ac63519541 492
Michael J. Spencer 1:f5ac63519541 493 #define ACKCIDNS(opt, neg, addr) \
Michael J. Spencer 1:f5ac63519541 494 if (neg) { \
Michael J. Spencer 1:f5ac63519541 495 u32_t l; \
Michael J. Spencer 1:f5ac63519541 496 if ((len -= CILEN_ADDR) < 0) { \
Michael J. Spencer 1:f5ac63519541 497 goto bad; \
Michael J. Spencer 1:f5ac63519541 498 } \
Michael J. Spencer 1:f5ac63519541 499 GETCHAR(citype, p); \
Michael J. Spencer 1:f5ac63519541 500 GETCHAR(cilen, p); \
Michael J. Spencer 1:f5ac63519541 501 if (cilen != CILEN_ADDR || \
Michael J. Spencer 1:f5ac63519541 502 citype != opt) { \
Michael J. Spencer 1:f5ac63519541 503 goto bad; \
Michael J. Spencer 1:f5ac63519541 504 } \
Michael J. Spencer 1:f5ac63519541 505 GETLONG(l, p); \
Michael J. Spencer 1:f5ac63519541 506 cilong = htonl(l); \
Michael J. Spencer 1:f5ac63519541 507 if (addr != cilong) { \
Michael J. Spencer 1:f5ac63519541 508 goto bad; \
Michael J. Spencer 1:f5ac63519541 509 } \
Michael J. Spencer 1:f5ac63519541 510 }
Michael J. Spencer 1:f5ac63519541 511
Michael J. Spencer 1:f5ac63519541 512 ACKCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), go->neg_addr,
Michael J. Spencer 1:f5ac63519541 513 go->old_addrs, go->ouraddr, go->hisaddr);
Michael J. Spencer 1:f5ac63519541 514
Michael J. Spencer 1:f5ac63519541 515 ACKCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj,
Michael J. Spencer 1:f5ac63519541 516 go->maxslotindex, go->cflag);
Michael J. Spencer 1:f5ac63519541 517
Michael J. Spencer 1:f5ac63519541 518 ACKCIDNS(CI_MS_DNS1, go->req_dns1, go->dnsaddr[0]);
Michael J. Spencer 1:f5ac63519541 519
Michael J. Spencer 1:f5ac63519541 520 ACKCIDNS(CI_MS_DNS2, go->req_dns2, go->dnsaddr[1]);
Michael J. Spencer 1:f5ac63519541 521
Michael J. Spencer 1:f5ac63519541 522 /*
Michael J. Spencer 1:f5ac63519541 523 * If there are any remaining CIs, then this packet is bad.
Michael J. Spencer 1:f5ac63519541 524 */
Michael J. Spencer 1:f5ac63519541 525 if (len != 0) {
Michael J. Spencer 1:f5ac63519541 526 goto bad;
Michael J. Spencer 1:f5ac63519541 527 }
Michael J. Spencer 1:f5ac63519541 528 return (1);
Michael J. Spencer 1:f5ac63519541 529
Michael J. Spencer 1:f5ac63519541 530 bad:
Michael J. Spencer 1:f5ac63519541 531 IPCPDEBUG(LOG_INFO, ("ipcp_ackci: received bad Ack!\n"));
Michael J. Spencer 1:f5ac63519541 532 return (0);
Michael J. Spencer 1:f5ac63519541 533 }
Michael J. Spencer 1:f5ac63519541 534
Michael J. Spencer 1:f5ac63519541 535 /*
Michael J. Spencer 1:f5ac63519541 536 * ipcp_nakci - Peer has sent a NAK for some of our CIs.
Michael J. Spencer 1:f5ac63519541 537 * This should not modify any state if the Nak is bad
Michael J. Spencer 1:f5ac63519541 538 * or if IPCP is in the LS_OPENED state.
Michael J. Spencer 1:f5ac63519541 539 *
Michael J. Spencer 1:f5ac63519541 540 * Returns:
Michael J. Spencer 1:f5ac63519541 541 * 0 - Nak was bad.
Michael J. Spencer 1:f5ac63519541 542 * 1 - Nak was good.
Michael J. Spencer 1:f5ac63519541 543 */
Michael J. Spencer 1:f5ac63519541 544 static int
Michael J. Spencer 1:f5ac63519541 545 ipcp_nakci(fsm *f, u_char *p, int len)
Michael J. Spencer 1:f5ac63519541 546 {
Michael J. Spencer 1:f5ac63519541 547 ipcp_options *go = &ipcp_gotoptions[f->unit];
Michael J. Spencer 1:f5ac63519541 548 u_char cimaxslotindex, cicflag;
Michael J. Spencer 1:f5ac63519541 549 u_char citype, cilen, *next;
Michael J. Spencer 1:f5ac63519541 550 u_short cishort;
Michael J. Spencer 1:f5ac63519541 551 u32_t ciaddr1, ciaddr2, l, cidnsaddr;
Michael J. Spencer 1:f5ac63519541 552 ipcp_options no; /* options we've seen Naks for */
Michael J. Spencer 1:f5ac63519541 553 ipcp_options try; /* options to request next time */
Michael J. Spencer 1:f5ac63519541 554
Michael J. Spencer 1:f5ac63519541 555 BZERO(&no, sizeof(no));
Michael J. Spencer 1:f5ac63519541 556 try = *go;
Michael J. Spencer 1:f5ac63519541 557
Michael J. Spencer 1:f5ac63519541 558 /*
Michael J. Spencer 1:f5ac63519541 559 * Any Nak'd CIs must be in exactly the same order that we sent.
Michael J. Spencer 1:f5ac63519541 560 * Check packet length and CI length at each step.
Michael J. Spencer 1:f5ac63519541 561 * If we find any deviations, then this packet is bad.
Michael J. Spencer 1:f5ac63519541 562 */
Michael J. Spencer 1:f5ac63519541 563 #define NAKCIADDR(opt, neg, old, code) \
Michael J. Spencer 1:f5ac63519541 564 if (go->neg && \
Michael J. Spencer 1:f5ac63519541 565 len >= (cilen = (old? CILEN_ADDRS: CILEN_ADDR)) && \
Michael J. Spencer 1:f5ac63519541 566 p[1] == cilen && \
Michael J. Spencer 1:f5ac63519541 567 p[0] == opt) { \
Michael J. Spencer 1:f5ac63519541 568 len -= cilen; \
Michael J. Spencer 1:f5ac63519541 569 INCPTR(2, p); \
Michael J. Spencer 1:f5ac63519541 570 GETLONG(l, p); \
Michael J. Spencer 1:f5ac63519541 571 ciaddr1 = htonl(l); \
Michael J. Spencer 1:f5ac63519541 572 if (old) { \
Michael J. Spencer 1:f5ac63519541 573 GETLONG(l, p); \
Michael J. Spencer 1:f5ac63519541 574 ciaddr2 = htonl(l); \
Michael J. Spencer 1:f5ac63519541 575 no.old_addrs = 1; \
Michael J. Spencer 1:f5ac63519541 576 } else { \
Michael J. Spencer 1:f5ac63519541 577 ciaddr2 = 0; \
Michael J. Spencer 1:f5ac63519541 578 } \
Michael J. Spencer 1:f5ac63519541 579 no.neg = 1; \
Michael J. Spencer 1:f5ac63519541 580 code \
Michael J. Spencer 1:f5ac63519541 581 }
Michael J. Spencer 1:f5ac63519541 582
Michael J. Spencer 1:f5ac63519541 583 #define NAKCIVJ(opt, neg, code) \
Michael J. Spencer 1:f5ac63519541 584 if (go->neg && \
Michael J. Spencer 1:f5ac63519541 585 ((cilen = p[1]) == CILEN_COMPRESS || cilen == CILEN_VJ) && \
Michael J. Spencer 1:f5ac63519541 586 len >= cilen && \
Michael J. Spencer 1:f5ac63519541 587 p[0] == opt) { \
Michael J. Spencer 1:f5ac63519541 588 len -= cilen; \
Michael J. Spencer 1:f5ac63519541 589 INCPTR(2, p); \
Michael J. Spencer 1:f5ac63519541 590 GETSHORT(cishort, p); \
Michael J. Spencer 1:f5ac63519541 591 no.neg = 1; \
Michael J. Spencer 1:f5ac63519541 592 code \
Michael J. Spencer 1:f5ac63519541 593 }
Michael J. Spencer 1:f5ac63519541 594
Michael J. Spencer 1:f5ac63519541 595 #define NAKCIDNS(opt, neg, code) \
Michael J. Spencer 1:f5ac63519541 596 if (go->neg && \
Michael J. Spencer 1:f5ac63519541 597 ((cilen = p[1]) == CILEN_ADDR) && \
Michael J. Spencer 1:f5ac63519541 598 len >= cilen && \
Michael J. Spencer 1:f5ac63519541 599 p[0] == opt) { \
Michael J. Spencer 1:f5ac63519541 600 len -= cilen; \
Michael J. Spencer 1:f5ac63519541 601 INCPTR(2, p); \
Michael J. Spencer 1:f5ac63519541 602 GETLONG(l, p); \
Michael J. Spencer 1:f5ac63519541 603 cidnsaddr = htonl(l); \
Michael J. Spencer 1:f5ac63519541 604 no.neg = 1; \
Michael J. Spencer 1:f5ac63519541 605 code \
Michael J. Spencer 1:f5ac63519541 606 }
Michael J. Spencer 1:f5ac63519541 607
Michael J. Spencer 1:f5ac63519541 608 /*
Michael J. Spencer 1:f5ac63519541 609 * Accept the peer's idea of {our,his} address, if different
Michael J. Spencer 1:f5ac63519541 610 * from our idea, only if the accept_{local,remote} flag is set.
Michael J. Spencer 1:f5ac63519541 611 */
Michael J. Spencer 1:f5ac63519541 612 NAKCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), neg_addr, go->old_addrs,
Michael J. Spencer 1:f5ac63519541 613 if (go->accept_local && ciaddr1) { /* Do we know our address? */
Michael J. Spencer 1:f5ac63519541 614 try.ouraddr = ciaddr1;
Michael J. Spencer 1:f5ac63519541 615 IPCPDEBUG(LOG_INFO, ("local IP address %s\n",
Michael J. Spencer 1:f5ac63519541 616 inet_ntoa(ciaddr1)));
Michael J. Spencer 1:f5ac63519541 617 }
Michael J. Spencer 1:f5ac63519541 618 if (go->accept_remote && ciaddr2) { /* Does he know his? */
Michael J. Spencer 1:f5ac63519541 619 try.hisaddr = ciaddr2;
Michael J. Spencer 1:f5ac63519541 620 IPCPDEBUG(LOG_INFO, ("remote IP address %s\n",
Michael J. Spencer 1:f5ac63519541 621 inet_ntoa(ciaddr2)));
Michael J. Spencer 1:f5ac63519541 622 }
Michael J. Spencer 1:f5ac63519541 623 );
Michael J. Spencer 1:f5ac63519541 624
Michael J. Spencer 1:f5ac63519541 625 /*
Michael J. Spencer 1:f5ac63519541 626 * Accept the peer's value of maxslotindex provided that it
Michael J. Spencer 1:f5ac63519541 627 * is less than what we asked for. Turn off slot-ID compression
Michael J. Spencer 1:f5ac63519541 628 * if the peer wants. Send old-style compress-type option if
Michael J. Spencer 1:f5ac63519541 629 * the peer wants.
Michael J. Spencer 1:f5ac63519541 630 */
Michael J. Spencer 1:f5ac63519541 631 NAKCIVJ(CI_COMPRESSTYPE, neg_vj,
Michael J. Spencer 1:f5ac63519541 632 if (cilen == CILEN_VJ) {
Michael J. Spencer 1:f5ac63519541 633 GETCHAR(cimaxslotindex, p);
Michael J. Spencer 1:f5ac63519541 634 GETCHAR(cicflag, p);
Michael J. Spencer 1:f5ac63519541 635 if (cishort == IPCP_VJ_COMP) {
Michael J. Spencer 1:f5ac63519541 636 try.old_vj = 0;
Michael J. Spencer 1:f5ac63519541 637 if (cimaxslotindex < go->maxslotindex) {
Michael J. Spencer 1:f5ac63519541 638 try.maxslotindex = cimaxslotindex;
Michael J. Spencer 1:f5ac63519541 639 }
Michael J. Spencer 1:f5ac63519541 640 if (!cicflag) {
Michael J. Spencer 1:f5ac63519541 641 try.cflag = 0;
Michael J. Spencer 1:f5ac63519541 642 }
Michael J. Spencer 1:f5ac63519541 643 } else {
Michael J. Spencer 1:f5ac63519541 644 try.neg_vj = 0;
Michael J. Spencer 1:f5ac63519541 645 }
Michael J. Spencer 1:f5ac63519541 646 } else {
Michael J. Spencer 1:f5ac63519541 647 if (cishort == IPCP_VJ_COMP || cishort == IPCP_VJ_COMP_OLD) {
Michael J. Spencer 1:f5ac63519541 648 try.old_vj = 1;
Michael J. Spencer 1:f5ac63519541 649 try.vj_protocol = cishort;
Michael J. Spencer 1:f5ac63519541 650 } else {
Michael J. Spencer 1:f5ac63519541 651 try.neg_vj = 0;
Michael J. Spencer 1:f5ac63519541 652 }
Michael J. Spencer 1:f5ac63519541 653 }
Michael J. Spencer 1:f5ac63519541 654 );
Michael J. Spencer 1:f5ac63519541 655
Michael J. Spencer 1:f5ac63519541 656 NAKCIDNS(CI_MS_DNS1, req_dns1,
Michael J. Spencer 1:f5ac63519541 657 try.dnsaddr[0] = cidnsaddr;
Michael J. Spencer 1:f5ac63519541 658 IPCPDEBUG(LOG_INFO, ("primary DNS address %s\n", inet_ntoa(cidnsaddr)));
Michael J. Spencer 1:f5ac63519541 659 );
Michael J. Spencer 1:f5ac63519541 660
Michael J. Spencer 1:f5ac63519541 661 NAKCIDNS(CI_MS_DNS2, req_dns2,
Michael J. Spencer 1:f5ac63519541 662 try.dnsaddr[1] = cidnsaddr;
Michael J. Spencer 1:f5ac63519541 663 IPCPDEBUG(LOG_INFO, ("secondary DNS address %s\n", inet_ntoa(cidnsaddr)));
Michael J. Spencer 1:f5ac63519541 664 );
Michael J. Spencer 1:f5ac63519541 665
Michael J. Spencer 1:f5ac63519541 666 /*
Michael J. Spencer 1:f5ac63519541 667 * There may be remaining CIs, if the peer is requesting negotiation
Michael J. Spencer 1:f5ac63519541 668 * on an option that we didn't include in our request packet.
Michael J. Spencer 1:f5ac63519541 669 * If they want to negotiate about IP addresses, we comply.
Michael J. Spencer 1:f5ac63519541 670 * If they want us to ask for compression, we refuse.
Michael J. Spencer 1:f5ac63519541 671 */
Michael J. Spencer 1:f5ac63519541 672 while (len > CILEN_VOID) {
Michael J. Spencer 1:f5ac63519541 673 GETCHAR(citype, p);
Michael J. Spencer 1:f5ac63519541 674 GETCHAR(cilen, p);
Michael J. Spencer 1:f5ac63519541 675 if( (len -= cilen) < 0 ) {
Michael J. Spencer 1:f5ac63519541 676 goto bad;
Michael J. Spencer 1:f5ac63519541 677 }
Michael J. Spencer 1:f5ac63519541 678 next = p + cilen - 2;
Michael J. Spencer 1:f5ac63519541 679
Michael J. Spencer 1:f5ac63519541 680 switch (citype) {
Michael J. Spencer 1:f5ac63519541 681 case CI_COMPRESSTYPE:
Michael J. Spencer 1:f5ac63519541 682 if (go->neg_vj || no.neg_vj ||
Michael J. Spencer 1:f5ac63519541 683 (cilen != CILEN_VJ && cilen != CILEN_COMPRESS)) {
Michael J. Spencer 1:f5ac63519541 684 goto bad;
Michael J. Spencer 1:f5ac63519541 685 }
Michael J. Spencer 1:f5ac63519541 686 no.neg_vj = 1;
Michael J. Spencer 1:f5ac63519541 687 break;
Michael J. Spencer 1:f5ac63519541 688 case CI_ADDRS:
Michael J. Spencer 1:f5ac63519541 689 if ((go->neg_addr && go->old_addrs) || no.old_addrs
Michael J. Spencer 1:f5ac63519541 690 || cilen != CILEN_ADDRS) {
Michael J. Spencer 1:f5ac63519541 691 goto bad;
Michael J. Spencer 1:f5ac63519541 692 }
Michael J. Spencer 1:f5ac63519541 693 try.neg_addr = 1;
Michael J. Spencer 1:f5ac63519541 694 try.old_addrs = 1;
Michael J. Spencer 1:f5ac63519541 695 GETLONG(l, p);
Michael J. Spencer 1:f5ac63519541 696 ciaddr1 = htonl(l);
Michael J. Spencer 1:f5ac63519541 697 if (ciaddr1 && go->accept_local) {
Michael J. Spencer 1:f5ac63519541 698 try.ouraddr = ciaddr1;
Michael J. Spencer 1:f5ac63519541 699 }
Michael J. Spencer 1:f5ac63519541 700 GETLONG(l, p);
Michael J. Spencer 1:f5ac63519541 701 ciaddr2 = htonl(l);
Michael J. Spencer 1:f5ac63519541 702 if (ciaddr2 && go->accept_remote) {
Michael J. Spencer 1:f5ac63519541 703 try.hisaddr = ciaddr2;
Michael J. Spencer 1:f5ac63519541 704 }
Michael J. Spencer 1:f5ac63519541 705 no.old_addrs = 1;
Michael J. Spencer 1:f5ac63519541 706 break;
Michael J. Spencer 1:f5ac63519541 707 case CI_ADDR:
Michael J. Spencer 1:f5ac63519541 708 if (go->neg_addr || no.neg_addr || cilen != CILEN_ADDR) {
Michael J. Spencer 1:f5ac63519541 709 goto bad;
Michael J. Spencer 1:f5ac63519541 710 }
Michael J. Spencer 1:f5ac63519541 711 try.old_addrs = 0;
Michael J. Spencer 1:f5ac63519541 712 GETLONG(l, p);
Michael J. Spencer 1:f5ac63519541 713 ciaddr1 = htonl(l);
Michael J. Spencer 1:f5ac63519541 714 if (ciaddr1 && go->accept_local) {
Michael J. Spencer 1:f5ac63519541 715 try.ouraddr = ciaddr1;
Michael J. Spencer 1:f5ac63519541 716 }
Michael J. Spencer 1:f5ac63519541 717 if (try.ouraddr != 0) {
Michael J. Spencer 1:f5ac63519541 718 try.neg_addr = 1;
Michael J. Spencer 1:f5ac63519541 719 }
Michael J. Spencer 1:f5ac63519541 720 no.neg_addr = 1;
Michael J. Spencer 1:f5ac63519541 721 break;
Michael J. Spencer 1:f5ac63519541 722 }
Michael J. Spencer 1:f5ac63519541 723 p = next;
Michael J. Spencer 1:f5ac63519541 724 }
Michael J. Spencer 1:f5ac63519541 725
Michael J. Spencer 1:f5ac63519541 726 /* If there is still anything left, this packet is bad. */
Michael J. Spencer 1:f5ac63519541 727 if (len != 0) {
Michael J. Spencer 1:f5ac63519541 728 goto bad;
Michael J. Spencer 1:f5ac63519541 729 }
Michael J. Spencer 1:f5ac63519541 730
Michael J. Spencer 1:f5ac63519541 731 /*
Michael J. Spencer 1:f5ac63519541 732 * OK, the Nak is good. Now we can update state.
Michael J. Spencer 1:f5ac63519541 733 */
Michael J. Spencer 1:f5ac63519541 734 if (f->state != LS_OPENED) {
Michael J. Spencer 1:f5ac63519541 735 *go = try;
Michael J. Spencer 1:f5ac63519541 736 }
Michael J. Spencer 1:f5ac63519541 737
Michael J. Spencer 1:f5ac63519541 738 return 1;
Michael J. Spencer 1:f5ac63519541 739
Michael J. Spencer 1:f5ac63519541 740 bad:
Michael J. Spencer 1:f5ac63519541 741 IPCPDEBUG(LOG_INFO, ("ipcp_nakci: received bad Nak!\n"));
Michael J. Spencer 1:f5ac63519541 742 return 0;
Michael J. Spencer 1:f5ac63519541 743 }
Michael J. Spencer 1:f5ac63519541 744
Michael J. Spencer 1:f5ac63519541 745
Michael J. Spencer 1:f5ac63519541 746 /*
Michael J. Spencer 1:f5ac63519541 747 * ipcp_rejci - Reject some of our CIs.
Michael J. Spencer 1:f5ac63519541 748 */
Michael J. Spencer 1:f5ac63519541 749 static int
Michael J. Spencer 1:f5ac63519541 750 ipcp_rejci(fsm *f, u_char *p, int len)
Michael J. Spencer 1:f5ac63519541 751 {
Michael J. Spencer 1:f5ac63519541 752 ipcp_options *go = &ipcp_gotoptions[f->unit];
Michael J. Spencer 1:f5ac63519541 753 u_char cimaxslotindex, ciflag, cilen;
Michael J. Spencer 1:f5ac63519541 754 u_short cishort;
Michael J. Spencer 1:f5ac63519541 755 u32_t cilong;
Michael J. Spencer 1:f5ac63519541 756 ipcp_options try; /* options to request next time */
Michael J. Spencer 1:f5ac63519541 757
Michael J. Spencer 1:f5ac63519541 758 try = *go;
Michael J. Spencer 1:f5ac63519541 759 /*
Michael J. Spencer 1:f5ac63519541 760 * Any Rejected CIs must be in exactly the same order that we sent.
Michael J. Spencer 1:f5ac63519541 761 * Check packet length and CI length at each step.
Michael J. Spencer 1:f5ac63519541 762 * If we find any deviations, then this packet is bad.
Michael J. Spencer 1:f5ac63519541 763 */
Michael J. Spencer 1:f5ac63519541 764 #define REJCIADDR(opt, neg, old, val1, val2) \
Michael J. Spencer 1:f5ac63519541 765 if (go->neg && \
Michael J. Spencer 1:f5ac63519541 766 len >= (cilen = old? CILEN_ADDRS: CILEN_ADDR) && \
Michael J. Spencer 1:f5ac63519541 767 p[1] == cilen && \
Michael J. Spencer 1:f5ac63519541 768 p[0] == opt) { \
Michael J. Spencer 1:f5ac63519541 769 u32_t l; \
Michael J. Spencer 1:f5ac63519541 770 len -= cilen; \
Michael J. Spencer 1:f5ac63519541 771 INCPTR(2, p); \
Michael J. Spencer 1:f5ac63519541 772 GETLONG(l, p); \
Michael J. Spencer 1:f5ac63519541 773 cilong = htonl(l); \
Michael J. Spencer 1:f5ac63519541 774 /* Check rejected value. */ \
Michael J. Spencer 1:f5ac63519541 775 if (cilong != val1) { \
Michael J. Spencer 1:f5ac63519541 776 goto bad; \
Michael J. Spencer 1:f5ac63519541 777 } \
Michael J. Spencer 1:f5ac63519541 778 if (old) { \
Michael J. Spencer 1:f5ac63519541 779 GETLONG(l, p); \
Michael J. Spencer 1:f5ac63519541 780 cilong = htonl(l); \
Michael J. Spencer 1:f5ac63519541 781 /* Check rejected value. */ \
Michael J. Spencer 1:f5ac63519541 782 if (cilong != val2) { \
Michael J. Spencer 1:f5ac63519541 783 goto bad; \
Michael J. Spencer 1:f5ac63519541 784 } \
Michael J. Spencer 1:f5ac63519541 785 } \
Michael J. Spencer 1:f5ac63519541 786 try.neg = 0; \
Michael J. Spencer 1:f5ac63519541 787 }
Michael J. Spencer 1:f5ac63519541 788
Michael J. Spencer 1:f5ac63519541 789 #define REJCIVJ(opt, neg, val, old, maxslot, cflag) \
Michael J. Spencer 1:f5ac63519541 790 if (go->neg && \
Michael J. Spencer 1:f5ac63519541 791 p[1] == (old? CILEN_COMPRESS : CILEN_VJ) && \
Michael J. Spencer 1:f5ac63519541 792 len >= p[1] && \
Michael J. Spencer 1:f5ac63519541 793 p[0] == opt) { \
Michael J. Spencer 1:f5ac63519541 794 len -= p[1]; \
Michael J. Spencer 1:f5ac63519541 795 INCPTR(2, p); \
Michael J. Spencer 1:f5ac63519541 796 GETSHORT(cishort, p); \
Michael J. Spencer 1:f5ac63519541 797 /* Check rejected value. */ \
Michael J. Spencer 1:f5ac63519541 798 if (cishort != val) { \
Michael J. Spencer 1:f5ac63519541 799 goto bad; \
Michael J. Spencer 1:f5ac63519541 800 } \
Michael J. Spencer 1:f5ac63519541 801 if (!old) { \
Michael J. Spencer 1:f5ac63519541 802 GETCHAR(cimaxslotindex, p); \
Michael J. Spencer 1:f5ac63519541 803 if (cimaxslotindex != maxslot) { \
Michael J. Spencer 1:f5ac63519541 804 goto bad; \
Michael J. Spencer 1:f5ac63519541 805 } \
Michael J. Spencer 1:f5ac63519541 806 GETCHAR(ciflag, p); \
Michael J. Spencer 1:f5ac63519541 807 if (ciflag != cflag) { \
Michael J. Spencer 1:f5ac63519541 808 goto bad; \
Michael J. Spencer 1:f5ac63519541 809 } \
Michael J. Spencer 1:f5ac63519541 810 } \
Michael J. Spencer 1:f5ac63519541 811 try.neg = 0; \
Michael J. Spencer 1:f5ac63519541 812 }
Michael J. Spencer 1:f5ac63519541 813
Michael J. Spencer 1:f5ac63519541 814 #define REJCIDNS(opt, neg, dnsaddr) \
Michael J. Spencer 1:f5ac63519541 815 if (go->neg && \
Michael J. Spencer 1:f5ac63519541 816 ((cilen = p[1]) == CILEN_ADDR) && \
Michael J. Spencer 1:f5ac63519541 817 len >= cilen && \
Michael J. Spencer 1:f5ac63519541 818 p[0] == opt) { \
Michael J. Spencer 1:f5ac63519541 819 u32_t l; \
Michael J. Spencer 1:f5ac63519541 820 len -= cilen; \
Michael J. Spencer 1:f5ac63519541 821 INCPTR(2, p); \
Michael J. Spencer 1:f5ac63519541 822 GETLONG(l, p); \
Michael J. Spencer 1:f5ac63519541 823 cilong = htonl(l); \
Michael J. Spencer 1:f5ac63519541 824 /* Check rejected value. */ \
Michael J. Spencer 1:f5ac63519541 825 if (cilong != dnsaddr) { \
Michael J. Spencer 1:f5ac63519541 826 goto bad; \
Michael J. Spencer 1:f5ac63519541 827 } \
Michael J. Spencer 1:f5ac63519541 828 try.neg = 0; \
Michael J. Spencer 1:f5ac63519541 829 }
Michael J. Spencer 1:f5ac63519541 830
Michael J. Spencer 1:f5ac63519541 831 REJCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), neg_addr,
Michael J. Spencer 1:f5ac63519541 832 go->old_addrs, go->ouraddr, go->hisaddr);
Michael J. Spencer 1:f5ac63519541 833
Michael J. Spencer 1:f5ac63519541 834 REJCIVJ(CI_COMPRESSTYPE, neg_vj, go->vj_protocol, go->old_vj,
Michael J. Spencer 1:f5ac63519541 835 go->maxslotindex, go->cflag);
Michael J. Spencer 1:f5ac63519541 836
Michael J. Spencer 1:f5ac63519541 837 REJCIDNS(CI_MS_DNS1, req_dns1, go->dnsaddr[0]);
Michael J. Spencer 1:f5ac63519541 838
Michael J. Spencer 1:f5ac63519541 839 REJCIDNS(CI_MS_DNS2, req_dns2, go->dnsaddr[1]);
Michael J. Spencer 1:f5ac63519541 840
Michael J. Spencer 1:f5ac63519541 841 /*
Michael J. Spencer 1:f5ac63519541 842 * If there are any remaining CIs, then this packet is bad.
Michael J. Spencer 1:f5ac63519541 843 */
Michael J. Spencer 1:f5ac63519541 844 if (len != 0) {
Michael J. Spencer 1:f5ac63519541 845 goto bad;
Michael J. Spencer 1:f5ac63519541 846 }
Michael J. Spencer 1:f5ac63519541 847 /*
Michael J. Spencer 1:f5ac63519541 848 * Now we can update state.
Michael J. Spencer 1:f5ac63519541 849 */
Michael J. Spencer 1:f5ac63519541 850 if (f->state != LS_OPENED) {
Michael J. Spencer 1:f5ac63519541 851 *go = try;
Michael J. Spencer 1:f5ac63519541 852 }
Michael J. Spencer 1:f5ac63519541 853 return 1;
Michael J. Spencer 1:f5ac63519541 854
Michael J. Spencer 1:f5ac63519541 855 bad:
Michael J. Spencer 1:f5ac63519541 856 IPCPDEBUG(LOG_INFO, ("ipcp_rejci: received bad Reject!\n"));
Michael J. Spencer 1:f5ac63519541 857 return 0;
Michael J. Spencer 1:f5ac63519541 858 }
Michael J. Spencer 1:f5ac63519541 859
Michael J. Spencer 1:f5ac63519541 860
Michael J. Spencer 1:f5ac63519541 861 /*
Michael J. Spencer 1:f5ac63519541 862 * ipcp_reqci - Check the peer's requested CIs and send appropriate response.
Michael J. Spencer 1:f5ac63519541 863 *
Michael J. Spencer 1:f5ac63519541 864 * Returns: CONFACK, CONFNAK or CONFREJ and input packet modified
Michael J. Spencer 1:f5ac63519541 865 * appropriately. If reject_if_disagree is non-zero, doesn't return
Michael J. Spencer 1:f5ac63519541 866 * CONFNAK; returns CONFREJ if it can't return CONFACK.
Michael J. Spencer 1:f5ac63519541 867 */
Michael J. Spencer 1:f5ac63519541 868 static int
Michael J. Spencer 1:f5ac63519541 869 ipcp_reqci(fsm *f, u_char *inp/* Requested CIs */,int *len/* Length of requested CIs */,int reject_if_disagree)
Michael J. Spencer 1:f5ac63519541 870 {
Michael J. Spencer 1:f5ac63519541 871 ipcp_options *wo = &ipcp_wantoptions[f->unit];
Michael J. Spencer 1:f5ac63519541 872 ipcp_options *ho = &ipcp_hisoptions[f->unit];
Michael J. Spencer 1:f5ac63519541 873 ipcp_options *ao = &ipcp_allowoptions[f->unit];
Michael J. Spencer 1:f5ac63519541 874 #ifdef OLD_CI_ADDRS
Michael J. Spencer 1:f5ac63519541 875 ipcp_options *go = &ipcp_gotoptions[f->unit];
Michael J. Spencer 1:f5ac63519541 876 #endif
Michael J. Spencer 1:f5ac63519541 877 u_char *cip, *next; /* Pointer to current and next CIs */
Michael J. Spencer 1:f5ac63519541 878 u_short cilen, citype; /* Parsed len, type */
Michael J. Spencer 1:f5ac63519541 879 u_short cishort; /* Parsed short value */
Michael J. Spencer 1:f5ac63519541 880 u32_t tl, ciaddr1; /* Parsed address values */
Michael J. Spencer 1:f5ac63519541 881 #ifdef OLD_CI_ADDRS
Michael J. Spencer 1:f5ac63519541 882 u32_t ciaddr2; /* Parsed address values */
Michael J. Spencer 1:f5ac63519541 883 #endif
Michael J. Spencer 1:f5ac63519541 884 int rc = CONFACK; /* Final packet return code */
Michael J. Spencer 1:f5ac63519541 885 int orc; /* Individual option return code */
Michael J. Spencer 1:f5ac63519541 886 u_char *p; /* Pointer to next char to parse */
Michael J. Spencer 1:f5ac63519541 887 u_char *ucp = inp; /* Pointer to current output char */
Michael J. Spencer 1:f5ac63519541 888 int l = *len; /* Length left */
Michael J. Spencer 1:f5ac63519541 889 u_char maxslotindex, cflag;
Michael J. Spencer 1:f5ac63519541 890 int d;
Michael J. Spencer 1:f5ac63519541 891
Michael J. Spencer 1:f5ac63519541 892 cis_received[f->unit] = 1;
Michael J. Spencer 1:f5ac63519541 893
Michael J. Spencer 1:f5ac63519541 894 /*
Michael J. Spencer 1:f5ac63519541 895 * Reset all his options.
Michael J. Spencer 1:f5ac63519541 896 */
Michael J. Spencer 1:f5ac63519541 897 BZERO(ho, sizeof(*ho));
Michael J. Spencer 1:f5ac63519541 898
Michael J. Spencer 1:f5ac63519541 899 /*
Michael J. Spencer 1:f5ac63519541 900 * Process all his options.
Michael J. Spencer 1:f5ac63519541 901 */
Michael J. Spencer 1:f5ac63519541 902 next = inp;
Michael J. Spencer 1:f5ac63519541 903 while (l) {
Michael J. Spencer 1:f5ac63519541 904 orc = CONFACK; /* Assume success */
Michael J. Spencer 1:f5ac63519541 905 cip = p = next; /* Remember begining of CI */
Michael J. Spencer 1:f5ac63519541 906 if (l < 2 || /* Not enough data for CI header or */
Michael J. Spencer 1:f5ac63519541 907 p[1] < 2 || /* CI length too small or */
Michael J. Spencer 1:f5ac63519541 908 p[1] > l) { /* CI length too big? */
Michael J. Spencer 1:f5ac63519541 909 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: bad CI length!\n"));
Michael J. Spencer 1:f5ac63519541 910 orc = CONFREJ; /* Reject bad CI */
Michael J. Spencer 1:f5ac63519541 911 cilen = (u_short)l;/* Reject till end of packet */
Michael J. Spencer 1:f5ac63519541 912 l = 0; /* Don't loop again */
Michael J. Spencer 1:f5ac63519541 913 goto endswitch;
Michael J. Spencer 1:f5ac63519541 914 }
Michael J. Spencer 1:f5ac63519541 915 GETCHAR(citype, p); /* Parse CI type */
Michael J. Spencer 1:f5ac63519541 916 GETCHAR(cilen, p); /* Parse CI length */
Michael J. Spencer 1:f5ac63519541 917 l -= cilen; /* Adjust remaining length */
Michael J. Spencer 1:f5ac63519541 918 next += cilen; /* Step to next CI */
Michael J. Spencer 1:f5ac63519541 919
Michael J. Spencer 1:f5ac63519541 920 switch (citype) { /* Check CI type */
Michael J. Spencer 1:f5ac63519541 921 #ifdef OLD_CI_ADDRS /* Need to save space... */
Michael J. Spencer 1:f5ac63519541 922 case CI_ADDRS:
Michael J. Spencer 1:f5ac63519541 923 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received ADDRS\n"));
Michael J. Spencer 1:f5ac63519541 924 if (!ao->neg_addr ||
Michael J. Spencer 1:f5ac63519541 925 cilen != CILEN_ADDRS) { /* Check CI length */
Michael J. Spencer 1:f5ac63519541 926 orc = CONFREJ; /* Reject CI */
Michael J. Spencer 1:f5ac63519541 927 break;
Michael J. Spencer 1:f5ac63519541 928 }
Michael J. Spencer 1:f5ac63519541 929
Michael J. Spencer 1:f5ac63519541 930 /*
Michael J. Spencer 1:f5ac63519541 931 * If he has no address, or if we both have his address but
Michael J. Spencer 1:f5ac63519541 932 * disagree about it, then NAK it with our idea.
Michael J. Spencer 1:f5ac63519541 933 * In particular, if we don't know his address, but he does,
Michael J. Spencer 1:f5ac63519541 934 * then accept it.
Michael J. Spencer 1:f5ac63519541 935 */
Michael J. Spencer 1:f5ac63519541 936 GETLONG(tl, p); /* Parse source address (his) */
Michael J. Spencer 1:f5ac63519541 937 ciaddr1 = htonl(tl);
Michael J. Spencer 1:f5ac63519541 938 IPCPDEBUG(LOG_INFO, ("his addr %s\n", inet_ntoa(ciaddr1)));
Michael J. Spencer 1:f5ac63519541 939 if (ciaddr1 != wo->hisaddr
Michael J. Spencer 1:f5ac63519541 940 && (ciaddr1 == 0 || !wo->accept_remote)) {
Michael J. Spencer 1:f5ac63519541 941 orc = CONFNAK;
Michael J. Spencer 1:f5ac63519541 942 if (!reject_if_disagree) {
Michael J. Spencer 1:f5ac63519541 943 DECPTR(sizeof(u32_t), p);
Michael J. Spencer 1:f5ac63519541 944 tl = ntohl(wo->hisaddr);
Michael J. Spencer 1:f5ac63519541 945 PUTLONG(tl, p);
Michael J. Spencer 1:f5ac63519541 946 }
Michael J. Spencer 1:f5ac63519541 947 } else if (ciaddr1 == 0 && wo->hisaddr == 0) {
Michael J. Spencer 1:f5ac63519541 948 /*
Michael J. Spencer 1:f5ac63519541 949 * If neither we nor he knows his address, reject the option.
Michael J. Spencer 1:f5ac63519541 950 */
Michael J. Spencer 1:f5ac63519541 951 orc = CONFREJ;
Michael J. Spencer 1:f5ac63519541 952 wo->req_addr = 0; /* don't NAK with 0.0.0.0 later */
Michael J. Spencer 1:f5ac63519541 953 break;
Michael J. Spencer 1:f5ac63519541 954 }
Michael J. Spencer 1:f5ac63519541 955
Michael J. Spencer 1:f5ac63519541 956 /*
Michael J. Spencer 1:f5ac63519541 957 * If he doesn't know our address, or if we both have our address
Michael J. Spencer 1:f5ac63519541 958 * but disagree about it, then NAK it with our idea.
Michael J. Spencer 1:f5ac63519541 959 */
Michael J. Spencer 1:f5ac63519541 960 GETLONG(tl, p); /* Parse desination address (ours) */
Michael J. Spencer 1:f5ac63519541 961 ciaddr2 = htonl(tl);
Michael J. Spencer 1:f5ac63519541 962 IPCPDEBUG(LOG_INFO, ("our addr %s\n", inet_ntoa(ciaddr2)));
Michael J. Spencer 1:f5ac63519541 963 if (ciaddr2 != wo->ouraddr) {
Michael J. Spencer 1:f5ac63519541 964 if (ciaddr2 == 0 || !wo->accept_local) {
Michael J. Spencer 1:f5ac63519541 965 orc = CONFNAK;
Michael J. Spencer 1:f5ac63519541 966 if (!reject_if_disagree) {
Michael J. Spencer 1:f5ac63519541 967 DECPTR(sizeof(u32_t), p);
Michael J. Spencer 1:f5ac63519541 968 tl = ntohl(wo->ouraddr);
Michael J. Spencer 1:f5ac63519541 969 PUTLONG(tl, p);
Michael J. Spencer 1:f5ac63519541 970 }
Michael J. Spencer 1:f5ac63519541 971 } else {
Michael J. Spencer 1:f5ac63519541 972 go->ouraddr = ciaddr2; /* accept peer's idea */
Michael J. Spencer 1:f5ac63519541 973 }
Michael J. Spencer 1:f5ac63519541 974 }
Michael J. Spencer 1:f5ac63519541 975
Michael J. Spencer 1:f5ac63519541 976 ho->neg_addr = 1;
Michael J. Spencer 1:f5ac63519541 977 ho->old_addrs = 1;
Michael J. Spencer 1:f5ac63519541 978 ho->hisaddr = ciaddr1;
Michael J. Spencer 1:f5ac63519541 979 ho->ouraddr = ciaddr2;
Michael J. Spencer 1:f5ac63519541 980 break;
Michael J. Spencer 1:f5ac63519541 981 #endif
Michael J. Spencer 1:f5ac63519541 982
Michael J. Spencer 1:f5ac63519541 983 case CI_ADDR:
Michael J. Spencer 1:f5ac63519541 984 if (!ao->neg_addr) {
Michael J. Spencer 1:f5ac63519541 985 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR not allowed\n"));
Michael J. Spencer 1:f5ac63519541 986 orc = CONFREJ; /* Reject CI */
Michael J. Spencer 1:f5ac63519541 987 break;
Michael J. Spencer 1:f5ac63519541 988 } else if (cilen != CILEN_ADDR) { /* Check CI length */
Michael J. Spencer 1:f5ac63519541 989 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR bad len\n"));
Michael J. Spencer 1:f5ac63519541 990 orc = CONFREJ; /* Reject CI */
Michael J. Spencer 1:f5ac63519541 991 break;
Michael J. Spencer 1:f5ac63519541 992 }
Michael J. Spencer 1:f5ac63519541 993
Michael J. Spencer 1:f5ac63519541 994 /*
Michael J. Spencer 1:f5ac63519541 995 * If he has no address, or if we both have his address but
Michael J. Spencer 1:f5ac63519541 996 * disagree about it, then NAK it with our idea.
Michael J. Spencer 1:f5ac63519541 997 * In particular, if we don't know his address, but he does,
Michael J. Spencer 1:f5ac63519541 998 * then accept it.
Michael J. Spencer 1:f5ac63519541 999 */
Michael J. Spencer 1:f5ac63519541 1000 GETLONG(tl, p); /* Parse source address (his) */
Michael J. Spencer 1:f5ac63519541 1001 ciaddr1 = htonl(tl);
Michael J. Spencer 1:f5ac63519541 1002 if (ciaddr1 != wo->hisaddr
Michael J. Spencer 1:f5ac63519541 1003 && (ciaddr1 == 0 || !wo->accept_remote)) {
Michael J. Spencer 1:f5ac63519541 1004 orc = CONFNAK;
Michael J. Spencer 1:f5ac63519541 1005 if (!reject_if_disagree) {
Michael J. Spencer 1:f5ac63519541 1006 DECPTR(sizeof(u32_t), p);
Michael J. Spencer 1:f5ac63519541 1007 tl = ntohl(wo->hisaddr);
Michael J. Spencer 1:f5ac63519541 1008 PUTLONG(tl, p);
Michael J. Spencer 1:f5ac63519541 1009 }
Michael J. Spencer 1:f5ac63519541 1010 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Nak ADDR %s\n", inet_ntoa(ciaddr1)));
Michael J. Spencer 1:f5ac63519541 1011 } else if (ciaddr1 == 0 && wo->hisaddr == 0) {
Michael J. Spencer 1:f5ac63519541 1012 /*
Michael J. Spencer 1:f5ac63519541 1013 * Don't ACK an address of 0.0.0.0 - reject it instead.
Michael J. Spencer 1:f5ac63519541 1014 */
Michael J. Spencer 1:f5ac63519541 1015 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR %s\n", inet_ntoa(ciaddr1)));
Michael J. Spencer 1:f5ac63519541 1016 orc = CONFREJ;
Michael J. Spencer 1:f5ac63519541 1017 wo->req_addr = 0; /* don't NAK with 0.0.0.0 later */
Michael J. Spencer 1:f5ac63519541 1018 break;
Michael J. Spencer 1:f5ac63519541 1019 }
Michael J. Spencer 1:f5ac63519541 1020
Michael J. Spencer 1:f5ac63519541 1021 ho->neg_addr = 1;
Michael J. Spencer 1:f5ac63519541 1022 ho->hisaddr = ciaddr1;
Michael J. Spencer 1:f5ac63519541 1023 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: ADDR %s\n", inet_ntoa(ciaddr1)));
Michael J. Spencer 1:f5ac63519541 1024 break;
Michael J. Spencer 1:f5ac63519541 1025
Michael J. Spencer 1:f5ac63519541 1026 case CI_MS_DNS1:
Michael J. Spencer 1:f5ac63519541 1027 case CI_MS_DNS2:
Michael J. Spencer 1:f5ac63519541 1028 /* Microsoft primary or secondary DNS request */
Michael J. Spencer 1:f5ac63519541 1029 d = citype == CI_MS_DNS2;
Michael J. Spencer 1:f5ac63519541 1030
Michael J. Spencer 1:f5ac63519541 1031 /* If we do not have a DNS address then we cannot send it */
Michael J. Spencer 1:f5ac63519541 1032 if (ao->dnsaddr[d] == 0 ||
Michael J. Spencer 1:f5ac63519541 1033 cilen != CILEN_ADDR) { /* Check CI length */
Michael J. Spencer 1:f5ac63519541 1034 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting DNS%d Request\n", d+1));
Michael J. Spencer 1:f5ac63519541 1035 orc = CONFREJ; /* Reject CI */
Michael J. Spencer 1:f5ac63519541 1036 break;
Michael J. Spencer 1:f5ac63519541 1037 }
Michael J. Spencer 1:f5ac63519541 1038 GETLONG(tl, p);
Michael J. Spencer 1:f5ac63519541 1039 if (htonl(tl) != ao->dnsaddr[d]) {
Michael J. Spencer 1:f5ac63519541 1040 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking DNS%d Request %s\n",
Michael J. Spencer 1:f5ac63519541 1041 d+1, inet_ntoa(tl)));
Michael J. Spencer 1:f5ac63519541 1042 DECPTR(sizeof(u32_t), p);
Michael J. Spencer 1:f5ac63519541 1043 tl = ntohl(ao->dnsaddr[d]);
Michael J. Spencer 1:f5ac63519541 1044 PUTLONG(tl, p);
Michael J. Spencer 1:f5ac63519541 1045 orc = CONFNAK;
Michael J. Spencer 1:f5ac63519541 1046 }
Michael J. Spencer 1:f5ac63519541 1047 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received DNS%d Request\n", d+1));
Michael J. Spencer 1:f5ac63519541 1048 break;
Michael J. Spencer 1:f5ac63519541 1049
Michael J. Spencer 1:f5ac63519541 1050 case CI_MS_WINS1:
Michael J. Spencer 1:f5ac63519541 1051 case CI_MS_WINS2:
Michael J. Spencer 1:f5ac63519541 1052 /* Microsoft primary or secondary WINS request */
Michael J. Spencer 1:f5ac63519541 1053 d = citype == CI_MS_WINS2;
Michael J. Spencer 1:f5ac63519541 1054 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received WINS%d Request\n", d+1));
Michael J. Spencer 1:f5ac63519541 1055
Michael J. Spencer 1:f5ac63519541 1056 /* If we do not have a DNS address then we cannot send it */
Michael J. Spencer 1:f5ac63519541 1057 if (ao->winsaddr[d] == 0 ||
Michael J. Spencer 1:f5ac63519541 1058 cilen != CILEN_ADDR) { /* Check CI length */
Michael J. Spencer 1:f5ac63519541 1059 orc = CONFREJ; /* Reject CI */
Michael J. Spencer 1:f5ac63519541 1060 break;
Michael J. Spencer 1:f5ac63519541 1061 }
Michael J. Spencer 1:f5ac63519541 1062 GETLONG(tl, p);
Michael J. Spencer 1:f5ac63519541 1063 if (htonl(tl) != ao->winsaddr[d]) {
Michael J. Spencer 1:f5ac63519541 1064 DECPTR(sizeof(u32_t), p);
Michael J. Spencer 1:f5ac63519541 1065 tl = ntohl(ao->winsaddr[d]);
Michael J. Spencer 1:f5ac63519541 1066 PUTLONG(tl, p);
Michael J. Spencer 1:f5ac63519541 1067 orc = CONFNAK;
Michael J. Spencer 1:f5ac63519541 1068 }
Michael J. Spencer 1:f5ac63519541 1069 break;
Michael J. Spencer 1:f5ac63519541 1070
Michael J. Spencer 1:f5ac63519541 1071 case CI_COMPRESSTYPE:
Michael J. Spencer 1:f5ac63519541 1072 if (!ao->neg_vj) {
Michael J. Spencer 1:f5ac63519541 1073 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE not allowed\n"));
Michael J. Spencer 1:f5ac63519541 1074 orc = CONFREJ;
Michael J. Spencer 1:f5ac63519541 1075 break;
Michael J. Spencer 1:f5ac63519541 1076 } else if (cilen != CILEN_VJ && cilen != CILEN_COMPRESS) {
Michael J. Spencer 1:f5ac63519541 1077 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE len=%d\n", cilen));
Michael J. Spencer 1:f5ac63519541 1078 orc = CONFREJ;
Michael J. Spencer 1:f5ac63519541 1079 break;
Michael J. Spencer 1:f5ac63519541 1080 }
Michael J. Spencer 1:f5ac63519541 1081 GETSHORT(cishort, p);
Michael J. Spencer 1:f5ac63519541 1082
Michael J. Spencer 1:f5ac63519541 1083 if (!(cishort == IPCP_VJ_COMP ||
Michael J. Spencer 1:f5ac63519541 1084 (cishort == IPCP_VJ_COMP_OLD && cilen == CILEN_COMPRESS))) {
Michael J. Spencer 1:f5ac63519541 1085 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE %d\n", cishort));
Michael J. Spencer 1:f5ac63519541 1086 orc = CONFREJ;
Michael J. Spencer 1:f5ac63519541 1087 break;
Michael J. Spencer 1:f5ac63519541 1088 }
Michael J. Spencer 1:f5ac63519541 1089
Michael J. Spencer 1:f5ac63519541 1090 ho->neg_vj = 1;
Michael J. Spencer 1:f5ac63519541 1091 ho->vj_protocol = cishort;
Michael J. Spencer 1:f5ac63519541 1092 if (cilen == CILEN_VJ) {
Michael J. Spencer 1:f5ac63519541 1093 GETCHAR(maxslotindex, p);
Michael J. Spencer 1:f5ac63519541 1094 if (maxslotindex > ao->maxslotindex) {
Michael J. Spencer 1:f5ac63519541 1095 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking VJ max slot %d\n", maxslotindex));
Michael J. Spencer 1:f5ac63519541 1096 orc = CONFNAK;
Michael J. Spencer 1:f5ac63519541 1097 if (!reject_if_disagree) {
Michael J. Spencer 1:f5ac63519541 1098 DECPTR(1, p);
Michael J. Spencer 1:f5ac63519541 1099 PUTCHAR(ao->maxslotindex, p);
Michael J. Spencer 1:f5ac63519541 1100 }
Michael J. Spencer 1:f5ac63519541 1101 }
Michael J. Spencer 1:f5ac63519541 1102 GETCHAR(cflag, p);
Michael J. Spencer 1:f5ac63519541 1103 if (cflag && !ao->cflag) {
Michael J. Spencer 1:f5ac63519541 1104 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking VJ cflag %d\n", cflag));
Michael J. Spencer 1:f5ac63519541 1105 orc = CONFNAK;
Michael J. Spencer 1:f5ac63519541 1106 if (!reject_if_disagree) {
Michael J. Spencer 1:f5ac63519541 1107 DECPTR(1, p);
Michael J. Spencer 1:f5ac63519541 1108 PUTCHAR(wo->cflag, p);
Michael J. Spencer 1:f5ac63519541 1109 }
Michael J. Spencer 1:f5ac63519541 1110 }
Michael J. Spencer 1:f5ac63519541 1111 ho->maxslotindex = maxslotindex;
Michael J. Spencer 1:f5ac63519541 1112 ho->cflag = cflag;
Michael J. Spencer 1:f5ac63519541 1113 } else {
Michael J. Spencer 1:f5ac63519541 1114 ho->old_vj = 1;
Michael J. Spencer 1:f5ac63519541 1115 ho->maxslotindex = MAX_SLOTS - 1;
Michael J. Spencer 1:f5ac63519541 1116 ho->cflag = 1;
Michael J. Spencer 1:f5ac63519541 1117 }
Michael J. Spencer 1:f5ac63519541 1118 IPCPDEBUG(LOG_INFO, (
Michael J. Spencer 1:f5ac63519541 1119 "ipcp_reqci: received COMPRESSTYPE p=%d old=%d maxslot=%d cflag=%d\n",
Michael J. Spencer 1:f5ac63519541 1120 ho->vj_protocol, ho->old_vj, ho->maxslotindex, ho->cflag));
Michael J. Spencer 1:f5ac63519541 1121 break;
Michael J. Spencer 1:f5ac63519541 1122
Michael J. Spencer 1:f5ac63519541 1123 default:
Michael J. Spencer 1:f5ac63519541 1124 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting unknown CI type %d\n", citype));
Michael J. Spencer 1:f5ac63519541 1125 orc = CONFREJ;
Michael J. Spencer 1:f5ac63519541 1126 break;
Michael J. Spencer 1:f5ac63519541 1127 }
Michael J. Spencer 1:f5ac63519541 1128
Michael J. Spencer 1:f5ac63519541 1129 endswitch:
Michael J. Spencer 1:f5ac63519541 1130 if (orc == CONFACK && /* Good CI */
Michael J. Spencer 1:f5ac63519541 1131 rc != CONFACK) { /* but prior CI wasnt? */
Michael J. Spencer 1:f5ac63519541 1132 continue; /* Don't send this one */
Michael J. Spencer 1:f5ac63519541 1133 }
Michael J. Spencer 1:f5ac63519541 1134
Michael J. Spencer 1:f5ac63519541 1135 if (orc == CONFNAK) { /* Nak this CI? */
Michael J. Spencer 1:f5ac63519541 1136 if (reject_if_disagree) { /* Getting fed up with sending NAKs? */
Michael J. Spencer 1:f5ac63519541 1137 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting too many naks\n"));
Michael J. Spencer 1:f5ac63519541 1138 orc = CONFREJ; /* Get tough if so */
Michael J. Spencer 1:f5ac63519541 1139 } else {
Michael J. Spencer 1:f5ac63519541 1140 if (rc == CONFREJ) { /* Rejecting prior CI? */
Michael J. Spencer 1:f5ac63519541 1141 continue; /* Don't send this one */
Michael J. Spencer 1:f5ac63519541 1142 }
Michael J. Spencer 1:f5ac63519541 1143 if (rc == CONFACK) { /* Ack'd all prior CIs? */
Michael J. Spencer 1:f5ac63519541 1144 rc = CONFNAK; /* Not anymore... */
Michael J. Spencer 1:f5ac63519541 1145 ucp = inp; /* Backup */
Michael J. Spencer 1:f5ac63519541 1146 }
Michael J. Spencer 1:f5ac63519541 1147 }
Michael J. Spencer 1:f5ac63519541 1148 }
Michael J. Spencer 1:f5ac63519541 1149
Michael J. Spencer 1:f5ac63519541 1150 if (orc == CONFREJ && /* Reject this CI */
Michael J. Spencer 1:f5ac63519541 1151 rc != CONFREJ) { /* but no prior ones? */
Michael J. Spencer 1:f5ac63519541 1152 rc = CONFREJ;
Michael J. Spencer 1:f5ac63519541 1153 ucp = inp; /* Backup */
Michael J. Spencer 1:f5ac63519541 1154 }
Michael J. Spencer 1:f5ac63519541 1155
Michael J. Spencer 1:f5ac63519541 1156 /* Need to move CI? */
Michael J. Spencer 1:f5ac63519541 1157 if (ucp != cip) {
Michael J. Spencer 1:f5ac63519541 1158 BCOPY(cip, ucp, cilen); /* Move it */
Michael J. Spencer 1:f5ac63519541 1159 }
Michael J. Spencer 1:f5ac63519541 1160
Michael J. Spencer 1:f5ac63519541 1161 /* Update output pointer */
Michael J. Spencer 1:f5ac63519541 1162 INCPTR(cilen, ucp);
Michael J. Spencer 1:f5ac63519541 1163 }
Michael J. Spencer 1:f5ac63519541 1164
Michael J. Spencer 1:f5ac63519541 1165 /*
Michael J. Spencer 1:f5ac63519541 1166 * If we aren't rejecting this packet, and we want to negotiate
Michael J. Spencer 1:f5ac63519541 1167 * their address, and they didn't send their address, then we
Michael J. Spencer 1:f5ac63519541 1168 * send a NAK with a CI_ADDR option appended. We assume the
Michael J. Spencer 1:f5ac63519541 1169 * input buffer is long enough that we can append the extra
Michael J. Spencer 1:f5ac63519541 1170 * option safely.
Michael J. Spencer 1:f5ac63519541 1171 */
Michael J. Spencer 1:f5ac63519541 1172 if (rc != CONFREJ && !ho->neg_addr &&
Michael J. Spencer 1:f5ac63519541 1173 wo->req_addr && !reject_if_disagree) {
Michael J. Spencer 1:f5ac63519541 1174 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Requesting peer address\n"));
Michael J. Spencer 1:f5ac63519541 1175 if (rc == CONFACK) {
Michael J. Spencer 1:f5ac63519541 1176 rc = CONFNAK;
Michael J. Spencer 1:f5ac63519541 1177 ucp = inp; /* reset pointer */
Michael J. Spencer 1:f5ac63519541 1178 wo->req_addr = 0; /* don't ask again */
Michael J. Spencer 1:f5ac63519541 1179 }
Michael J. Spencer 1:f5ac63519541 1180 PUTCHAR(CI_ADDR, ucp);
Michael J. Spencer 1:f5ac63519541 1181 PUTCHAR(CILEN_ADDR, ucp);
Michael J. Spencer 1:f5ac63519541 1182 tl = ntohl(wo->hisaddr);
Michael J. Spencer 1:f5ac63519541 1183 PUTLONG(tl, ucp);
Michael J. Spencer 1:f5ac63519541 1184 }
Michael J. Spencer 1:f5ac63519541 1185
Michael J. Spencer 1:f5ac63519541 1186 *len = (int)(ucp - inp); /* Compute output length */
Michael J. Spencer 1:f5ac63519541 1187 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: returning Configure-%s\n", CODENAME(rc)));
Michael J. Spencer 1:f5ac63519541 1188 return (rc); /* Return final code */
Michael J. Spencer 1:f5ac63519541 1189 }
Michael J. Spencer 1:f5ac63519541 1190
Michael J. Spencer 1:f5ac63519541 1191
Michael J. Spencer 1:f5ac63519541 1192 #if 0
Michael J. Spencer 1:f5ac63519541 1193 /*
Michael J. Spencer 1:f5ac63519541 1194 * ip_check_options - check that any IP-related options are OK,
Michael J. Spencer 1:f5ac63519541 1195 * and assign appropriate defaults.
Michael J. Spencer 1:f5ac63519541 1196 */
Michael J. Spencer 1:f5ac63519541 1197 static void
Michael J. Spencer 1:f5ac63519541 1198 ip_check_options(u_long localAddr)
Michael J. Spencer 1:f5ac63519541 1199 {
Michael J. Spencer 1:f5ac63519541 1200 ipcp_options *wo = &ipcp_wantoptions[0];
Michael J. Spencer 1:f5ac63519541 1201
Michael J. Spencer 1:f5ac63519541 1202 /*
Michael J. Spencer 1:f5ac63519541 1203 * Load our default IP address but allow the remote host to give us
Michael J. Spencer 1:f5ac63519541 1204 * a new address.
Michael J. Spencer 1:f5ac63519541 1205 */
Michael J. Spencer 1:f5ac63519541 1206 if (wo->ouraddr == 0 && !ppp_settings.disable_defaultip) {
Michael J. Spencer 1:f5ac63519541 1207 wo->accept_local = 1; /* don't insist on this default value */
Michael J. Spencer 1:f5ac63519541 1208 wo->ouraddr = htonl(localAddr);
Michael J. Spencer 1:f5ac63519541 1209 }
Michael J. Spencer 1:f5ac63519541 1210 }
Michael J. Spencer 1:f5ac63519541 1211 #endif
Michael J. Spencer 1:f5ac63519541 1212
Michael J. Spencer 1:f5ac63519541 1213
Michael J. Spencer 1:f5ac63519541 1214 /*
Michael J. Spencer 1:f5ac63519541 1215 * ipcp_up - IPCP has come UP.
Michael J. Spencer 1:f5ac63519541 1216 *
Michael J. Spencer 1:f5ac63519541 1217 * Configure the IP network interface appropriately and bring it up.
Michael J. Spencer 1:f5ac63519541 1218 */
Michael J. Spencer 1:f5ac63519541 1219 static void
Michael J. Spencer 1:f5ac63519541 1220 ipcp_up(fsm *f)
Michael J. Spencer 1:f5ac63519541 1221 {
Michael J. Spencer 1:f5ac63519541 1222 u32_t mask;
Michael J. Spencer 1:f5ac63519541 1223 ipcp_options *ho = &ipcp_hisoptions[f->unit];
Michael J. Spencer 1:f5ac63519541 1224 ipcp_options *go = &ipcp_gotoptions[f->unit];
Michael J. Spencer 1:f5ac63519541 1225 ipcp_options *wo = &ipcp_wantoptions[f->unit];
Michael J. Spencer 1:f5ac63519541 1226
Michael J. Spencer 1:f5ac63519541 1227 np_up(f->unit, PPP_IP);
Michael J. Spencer 1:f5ac63519541 1228 IPCPDEBUG(LOG_INFO, ("ipcp: up\n"));
Michael J. Spencer 1:f5ac63519541 1229
Michael J. Spencer 1:f5ac63519541 1230 /*
Michael J. Spencer 1:f5ac63519541 1231 * We must have a non-zero IP address for both ends of the link.
Michael J. Spencer 1:f5ac63519541 1232 */
Michael J. Spencer 1:f5ac63519541 1233 if (!ho->neg_addr) {
Michael J. Spencer 1:f5ac63519541 1234 ho->hisaddr = wo->hisaddr;
Michael J. Spencer 1:f5ac63519541 1235 }
Michael J. Spencer 1:f5ac63519541 1236 #ifdef __PPP_STRICT_IMPL__ //DG : Kludge for bad 3g providers PPP impl
Michael J. Spencer 1:f5ac63519541 1237 if (ho->hisaddr == 0) {
Michael J. Spencer 1:f5ac63519541 1238 IPCPDEBUG(LOG_ERR, ("Could not determine remote IP address\n"));
Michael J. Spencer 1:f5ac63519541 1239 ipcp_close(f->unit, "Could not determine remote IP address");
Michael J. Spencer 1:f5ac63519541 1240 return;
Michael J. Spencer 1:f5ac63519541 1241 }
Michael J. Spencer 1:f5ac63519541 1242 #endif
Michael J. Spencer 1:f5ac63519541 1243 if (go->ouraddr == 0) {
Michael J. Spencer 1:f5ac63519541 1244 IPCPDEBUG(LOG_ERR, ("Could not determine local IP address\n"));
Michael J. Spencer 1:f5ac63519541 1245 ipcp_close(f->unit, "Could not determine local IP address");
Michael J. Spencer 1:f5ac63519541 1246 return;
Michael J. Spencer 1:f5ac63519541 1247 }
Michael J. Spencer 1:f5ac63519541 1248
Michael J. Spencer 1:f5ac63519541 1249 if (ppp_settings.usepeerdns && (go->dnsaddr[0] || go->dnsaddr[1])) {
Michael J. Spencer 1:f5ac63519541 1250 /*pppGotDNSAddrs(go->dnsaddr[0], go->dnsaddr[1]);*/
Michael J. Spencer 1:f5ac63519541 1251 }
Michael J. Spencer 1:f5ac63519541 1252
Michael J. Spencer 1:f5ac63519541 1253 /*
Michael J. Spencer 1:f5ac63519541 1254 * Check that the peer is allowed to use the IP address it wants.
Michael J. Spencer 1:f5ac63519541 1255 */
Michael J. Spencer 1:f5ac63519541 1256 if (!auth_ip_addr(f->unit, ho->hisaddr)) {
Michael J. Spencer 1:f5ac63519541 1257 IPCPDEBUG(LOG_ERR, ("Peer is not authorized to use remote address %s\n",
Michael J. Spencer 1:f5ac63519541 1258 inet_ntoa(ho->hisaddr)));
Michael J. Spencer 1:f5ac63519541 1259 ipcp_close(f->unit, "Unauthorized remote IP address");
Michael J. Spencer 1:f5ac63519541 1260 return;
Michael J. Spencer 1:f5ac63519541 1261 }
Michael J. Spencer 1:f5ac63519541 1262
Michael J. Spencer 1:f5ac63519541 1263 /* set tcp compression */
Michael J. Spencer 1:f5ac63519541 1264 sifvjcomp(f->unit, ho->neg_vj, ho->cflag, ho->maxslotindex);
Michael J. Spencer 1:f5ac63519541 1265
Michael J. Spencer 1:f5ac63519541 1266 /*
Michael J. Spencer 1:f5ac63519541 1267 * Set IP addresses and (if specified) netmask.
Michael J. Spencer 1:f5ac63519541 1268 */
Michael J. Spencer 1:f5ac63519541 1269 mask = GetMask(go->ouraddr);
Michael J. Spencer 1:f5ac63519541 1270
Michael J. Spencer 1:f5ac63519541 1271 if (!sifaddr(f->unit, go->ouraddr, ho->hisaddr, mask, go->dnsaddr[0], go->dnsaddr[1])) {
Michael J. Spencer 1:f5ac63519541 1272 IPCPDEBUG(LOG_WARNING, ("sifaddr failed\n"));
Michael J. Spencer 1:f5ac63519541 1273 ipcp_close(f->unit, "Interface configuration failed");
Michael J. Spencer 1:f5ac63519541 1274 return;
Michael J. Spencer 1:f5ac63519541 1275 }
Michael J. Spencer 1:f5ac63519541 1276
Michael J. Spencer 1:f5ac63519541 1277 /* bring the interface up for IP */
Michael J. Spencer 1:f5ac63519541 1278 if (!sifup(f->unit)) {
Michael J. Spencer 1:f5ac63519541 1279 IPCPDEBUG(LOG_WARNING, ("sifup failed\n"));
Michael J. Spencer 1:f5ac63519541 1280 ipcp_close(f->unit, "Interface configuration failed");
Michael J. Spencer 1:f5ac63519541 1281 return;
Michael J. Spencer 1:f5ac63519541 1282 }
Michael J. Spencer 1:f5ac63519541 1283
Michael J. Spencer 1:f5ac63519541 1284 sifnpmode(f->unit, PPP_IP, NPMODE_PASS);
Michael J. Spencer 1:f5ac63519541 1285
Michael J. Spencer 1:f5ac63519541 1286 /* assign a default route through the interface if required */
Michael J. Spencer 1:f5ac63519541 1287 if (ipcp_wantoptions[f->unit].default_route) {
Michael J. Spencer 1:f5ac63519541 1288 if (sifdefaultroute(f->unit, go->ouraddr, ho->hisaddr)) {
Michael J. Spencer 1:f5ac63519541 1289 default_route_set[f->unit] = 1;
Michael J. Spencer 1:f5ac63519541 1290 }
Michael J. Spencer 1:f5ac63519541 1291 }
Michael J. Spencer 1:f5ac63519541 1292
Michael J. Spencer 1:f5ac63519541 1293 IPCPDEBUG(LOG_NOTICE, ("local IP address %s\n", inet_ntoa(go->ouraddr)));
Michael J. Spencer 1:f5ac63519541 1294 IPCPDEBUG(LOG_NOTICE, ("remote IP address %s\n", inet_ntoa(ho->hisaddr)));
Michael J. Spencer 1:f5ac63519541 1295 if (go->dnsaddr[0]) {
Michael J. Spencer 1:f5ac63519541 1296 IPCPDEBUG(LOG_NOTICE, ("primary DNS address %s\n", inet_ntoa(go->dnsaddr[0])));
Michael J. Spencer 1:f5ac63519541 1297 }
Michael J. Spencer 1:f5ac63519541 1298 if (go->dnsaddr[1]) {
Michael J. Spencer 1:f5ac63519541 1299 IPCPDEBUG(LOG_NOTICE, ("secondary DNS address %s\n", inet_ntoa(go->dnsaddr[1])));
Michael J. Spencer 1:f5ac63519541 1300 }
Michael J. Spencer 1:f5ac63519541 1301 }
Michael J. Spencer 1:f5ac63519541 1302
Michael J. Spencer 1:f5ac63519541 1303
Michael J. Spencer 1:f5ac63519541 1304 /*
Michael J. Spencer 1:f5ac63519541 1305 * ipcp_down - IPCP has gone DOWN.
Michael J. Spencer 1:f5ac63519541 1306 *
Michael J. Spencer 1:f5ac63519541 1307 * Take the IP network interface down, clear its addresses
Michael J. Spencer 1:f5ac63519541 1308 * and delete routes through it.
Michael J. Spencer 1:f5ac63519541 1309 */
Michael J. Spencer 1:f5ac63519541 1310 static void
Michael J. Spencer 1:f5ac63519541 1311 ipcp_down(fsm *f)
Michael J. Spencer 1:f5ac63519541 1312 {
Michael J. Spencer 1:f5ac63519541 1313 IPCPDEBUG(LOG_INFO, ("ipcp: down\n"));
Michael J. Spencer 1:f5ac63519541 1314 np_down(f->unit, PPP_IP);
Michael J. Spencer 1:f5ac63519541 1315 sifvjcomp(f->unit, 0, 0, 0);
Michael J. Spencer 1:f5ac63519541 1316
Michael J. Spencer 1:f5ac63519541 1317 sifdown(f->unit);
Michael J. Spencer 1:f5ac63519541 1318 ipcp_clear_addrs(f->unit);
Michael J. Spencer 1:f5ac63519541 1319 }
Michael J. Spencer 1:f5ac63519541 1320
Michael J. Spencer 1:f5ac63519541 1321
Michael J. Spencer 1:f5ac63519541 1322 /*
Michael J. Spencer 1:f5ac63519541 1323 * ipcp_clear_addrs() - clear the interface addresses, routes, etc.
Michael J. Spencer 1:f5ac63519541 1324 */
Michael J. Spencer 1:f5ac63519541 1325 static void
Michael J. Spencer 1:f5ac63519541 1326 ipcp_clear_addrs(int unit)
Michael J. Spencer 1:f5ac63519541 1327 {
Michael J. Spencer 1:f5ac63519541 1328 u32_t ouraddr, hisaddr;
Michael J. Spencer 1:f5ac63519541 1329
Michael J. Spencer 1:f5ac63519541 1330 ouraddr = ipcp_gotoptions[unit].ouraddr;
Michael J. Spencer 1:f5ac63519541 1331 hisaddr = ipcp_hisoptions[unit].hisaddr;
Michael J. Spencer 1:f5ac63519541 1332 if (default_route_set[unit]) {
Michael J. Spencer 1:f5ac63519541 1333 cifdefaultroute(unit, ouraddr, hisaddr);
Michael J. Spencer 1:f5ac63519541 1334 default_route_set[unit] = 0;
Michael J. Spencer 1:f5ac63519541 1335 }
Michael J. Spencer 1:f5ac63519541 1336 cifaddr(unit, ouraddr, hisaddr);
Michael J. Spencer 1:f5ac63519541 1337 }
Michael J. Spencer 1:f5ac63519541 1338
Michael J. Spencer 1:f5ac63519541 1339
Michael J. Spencer 1:f5ac63519541 1340 /*
Michael J. Spencer 1:f5ac63519541 1341 * ipcp_finished - possibly shut down the lower layers.
Michael J. Spencer 1:f5ac63519541 1342 */
Michael J. Spencer 1:f5ac63519541 1343 static void
Michael J. Spencer 1:f5ac63519541 1344 ipcp_finished(fsm *f)
Michael J. Spencer 1:f5ac63519541 1345 {
Michael J. Spencer 1:f5ac63519541 1346 np_finished(f->unit, PPP_IP);
Michael J. Spencer 1:f5ac63519541 1347 }
Michael J. Spencer 1:f5ac63519541 1348
Michael J. Spencer 1:f5ac63519541 1349 #if PPP_ADDITIONAL_CALLBACKS
Michael J. Spencer 1:f5ac63519541 1350 static int
Michael J. Spencer 1:f5ac63519541 1351 ipcp_printpkt(u_char *p, int plen, void (*printer) (void *, char *, ...), void *arg)
Michael J. Spencer 1:f5ac63519541 1352 {
Michael J. Spencer 1:f5ac63519541 1353 LWIP_UNUSED_ARG(p);
Michael J. Spencer 1:f5ac63519541 1354 LWIP_UNUSED_ARG(plen);
Michael J. Spencer 1:f5ac63519541 1355 LWIP_UNUSED_ARG(printer);
Michael J. Spencer 1:f5ac63519541 1356 LWIP_UNUSED_ARG(arg);
Michael J. Spencer 1:f5ac63519541 1357 return 0;
Michael J. Spencer 1:f5ac63519541 1358 }
Michael J. Spencer 1:f5ac63519541 1359
Michael J. Spencer 1:f5ac63519541 1360 /*
Michael J. Spencer 1:f5ac63519541 1361 * ip_active_pkt - see if this IP packet is worth bringing the link up for.
Michael J. Spencer 1:f5ac63519541 1362 * We don't bring the link up for IP fragments or for TCP FIN packets
Michael J. Spencer 1:f5ac63519541 1363 * with no data.
Michael J. Spencer 1:f5ac63519541 1364 */
Michael J. Spencer 1:f5ac63519541 1365 #define IP_HDRLEN 20 /* bytes */
Michael J. Spencer 1:f5ac63519541 1366 #define IP_OFFMASK 0x1fff
Michael J. Spencer 1:f5ac63519541 1367 #define IPPROTO_TCP 6
Michael J. Spencer 1:f5ac63519541 1368 #define TCP_HDRLEN 20
Michael J. Spencer 1:f5ac63519541 1369 #define TH_FIN 0x01
Michael J. Spencer 1:f5ac63519541 1370
Michael J. Spencer 1:f5ac63519541 1371 /*
Michael J. Spencer 1:f5ac63519541 1372 * We use these macros because the IP header may be at an odd address,
Michael J. Spencer 1:f5ac63519541 1373 * and some compilers might use word loads to get th_off or ip_hl.
Michael J. Spencer 1:f5ac63519541 1374 */
Michael J. Spencer 1:f5ac63519541 1375
Michael J. Spencer 1:f5ac63519541 1376 #define net_short(x) (((x)[0] << 8) + (x)[1])
Michael J. Spencer 1:f5ac63519541 1377 #define get_iphl(x) (((unsigned char *)(x))[0] & 0xF)
Michael J. Spencer 1:f5ac63519541 1378 #define get_ipoff(x) net_short((unsigned char *)(x) + 6)
Michael J. Spencer 1:f5ac63519541 1379 #define get_ipproto(x) (((unsigned char *)(x))[9])
Michael J. Spencer 1:f5ac63519541 1380 #define get_tcpoff(x) (((unsigned char *)(x))[12] >> 4)
Michael J. Spencer 1:f5ac63519541 1381 #define get_tcpflags(x) (((unsigned char *)(x))[13])
Michael J. Spencer 1:f5ac63519541 1382
Michael J. Spencer 1:f5ac63519541 1383 static int
Michael J. Spencer 1:f5ac63519541 1384 ip_active_pkt(u_char *pkt, int len)
Michael J. Spencer 1:f5ac63519541 1385 {
Michael J. Spencer 1:f5ac63519541 1386 u_char *tcp;
Michael J. Spencer 1:f5ac63519541 1387 int hlen;
Michael J. Spencer 1:f5ac63519541 1388
Michael J. Spencer 1:f5ac63519541 1389 len -= PPP_HDRLEN;
Michael J. Spencer 1:f5ac63519541 1390 pkt += PPP_HDRLEN;
Michael J. Spencer 1:f5ac63519541 1391 if (len < IP_HDRLEN) {
Michael J. Spencer 1:f5ac63519541 1392 return 0;
Michael J. Spencer 1:f5ac63519541 1393 }
Michael J. Spencer 1:f5ac63519541 1394 if ((get_ipoff(pkt) & IP_OFFMASK) != 0) {
Michael J. Spencer 1:f5ac63519541 1395 return 0;
Michael J. Spencer 1:f5ac63519541 1396 }
Michael J. Spencer 1:f5ac63519541 1397 if (get_ipproto(pkt) != IPPROTO_TCP) {
Michael J. Spencer 1:f5ac63519541 1398 return 1;
Michael J. Spencer 1:f5ac63519541 1399 }
Michael J. Spencer 1:f5ac63519541 1400 hlen = get_iphl(pkt) * 4;
Michael J. Spencer 1:f5ac63519541 1401 if (len < hlen + TCP_HDRLEN) {
Michael J. Spencer 1:f5ac63519541 1402 return 0;
Michael J. Spencer 1:f5ac63519541 1403 }
Michael J. Spencer 1:f5ac63519541 1404 tcp = pkt + hlen;
Michael J. Spencer 1:f5ac63519541 1405 if ((get_tcpflags(tcp) & TH_FIN) != 0 && len == hlen + get_tcpoff(tcp) * 4) {
Michael J. Spencer 1:f5ac63519541 1406 return 0;
Michael J. Spencer 1:f5ac63519541 1407 }
Michael J. Spencer 1:f5ac63519541 1408 return 1;
Michael J. Spencer 1:f5ac63519541 1409 }
Michael J. Spencer 1:f5ac63519541 1410 #endif /* PPP_ADDITIONAL_CALLBACKS */
Michael J. Spencer 1:f5ac63519541 1411
Michael J. Spencer 1:f5ac63519541 1412 #endif /* PPP_SUPPORT */