ZG2100 Network interface source

Committer:
donatien
Date:
Fri Jul 09 15:37:23 2010 +0000
Revision:
0:b802fc31f1db

        

Who changed what in which revision?

UserRevisionLine numberNew contents of line
donatien 0:b802fc31f1db 1 /** In contrast to pppd 2.3.1, DNS support has been added, proxy-ARP and
donatien 0:b802fc31f1db 2 dial-on-demand has been stripped. */
donatien 0:b802fc31f1db 3 /*****************************************************************************
donatien 0:b802fc31f1db 4 * ipcp.c - Network PPP IP Control Protocol program file.
donatien 0:b802fc31f1db 5 *
donatien 0:b802fc31f1db 6 * Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
donatien 0:b802fc31f1db 7 * portions Copyright (c) 1997 by Global Election Systems Inc.
donatien 0:b802fc31f1db 8 *
donatien 0:b802fc31f1db 9 * The authors hereby grant permission to use, copy, modify, distribute,
donatien 0:b802fc31f1db 10 * and license this software and its documentation for any purpose, provided
donatien 0:b802fc31f1db 11 * that existing copyright notices are retained in all copies and that this
donatien 0:b802fc31f1db 12 * notice and the following disclaimer are included verbatim in any
donatien 0:b802fc31f1db 13 * distributions. No written agreement, license, or royalty fee is required
donatien 0:b802fc31f1db 14 * for any of the authorized uses.
donatien 0:b802fc31f1db 15 *
donatien 0:b802fc31f1db 16 * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
donatien 0:b802fc31f1db 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
donatien 0:b802fc31f1db 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
donatien 0:b802fc31f1db 19 * IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
donatien 0:b802fc31f1db 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
donatien 0:b802fc31f1db 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
donatien 0:b802fc31f1db 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
donatien 0:b802fc31f1db 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
donatien 0:b802fc31f1db 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
donatien 0:b802fc31f1db 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
donatien 0:b802fc31f1db 26 *
donatien 0:b802fc31f1db 27 ******************************************************************************
donatien 0:b802fc31f1db 28 * REVISION HISTORY
donatien 0:b802fc31f1db 29 *
donatien 0:b802fc31f1db 30 * 03-01-01 Marc Boucher <marc@mbsi.ca>
donatien 0:b802fc31f1db 31 * Ported to lwIP.
donatien 0:b802fc31f1db 32 * 97-12-08 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
donatien 0:b802fc31f1db 33 * Original.
donatien 0:b802fc31f1db 34 *****************************************************************************/
donatien 0:b802fc31f1db 35 /*
donatien 0:b802fc31f1db 36 * ipcp.c - PPP IP Control Protocol.
donatien 0:b802fc31f1db 37 *
donatien 0:b802fc31f1db 38 * Copyright (c) 1989 Carnegie Mellon University.
donatien 0:b802fc31f1db 39 * All rights reserved.
donatien 0:b802fc31f1db 40 *
donatien 0:b802fc31f1db 41 * Redistribution and use in source and binary forms are permitted
donatien 0:b802fc31f1db 42 * provided that the above copyright notice and this paragraph are
donatien 0:b802fc31f1db 43 * duplicated in all such forms and that any documentation,
donatien 0:b802fc31f1db 44 * advertising materials, and other materials related to such
donatien 0:b802fc31f1db 45 * distribution and use acknowledge that the software was developed
donatien 0:b802fc31f1db 46 * by Carnegie Mellon University. The name of the
donatien 0:b802fc31f1db 47 * University may not be used to endorse or promote products derived
donatien 0:b802fc31f1db 48 * from this software without specific prior written permission.
donatien 0:b802fc31f1db 49 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
donatien 0:b802fc31f1db 50 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
donatien 0:b802fc31f1db 51 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
donatien 0:b802fc31f1db 52 */
donatien 0:b802fc31f1db 53
donatien 0:b802fc31f1db 54 #include "lwip/opt.h"
donatien 0:b802fc31f1db 55
donatien 0:b802fc31f1db 56 #if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
donatien 0:b802fc31f1db 57
donatien 0:b802fc31f1db 58 #include "ppp.h"
donatien 0:b802fc31f1db 59 #include "pppdebug.h"
donatien 0:b802fc31f1db 60
donatien 0:b802fc31f1db 61 #include "auth.h"
donatien 0:b802fc31f1db 62 #include "fsm.h"
donatien 0:b802fc31f1db 63 #include "vj.h"
donatien 0:b802fc31f1db 64 #include "ipcp.h"
donatien 0:b802fc31f1db 65
donatien 0:b802fc31f1db 66 #include "lwip/inet.h"
donatien 0:b802fc31f1db 67
donatien 0:b802fc31f1db 68 #include <string.h>
donatien 0:b802fc31f1db 69
donatien 0:b802fc31f1db 70 /* #define OLD_CI_ADDRS 1 */ /* Support deprecated address negotiation. */
donatien 0:b802fc31f1db 71
donatien 0:b802fc31f1db 72 /* global vars */
donatien 0:b802fc31f1db 73 ipcp_options ipcp_wantoptions[NUM_PPP]; /* Options that we want to request */
donatien 0:b802fc31f1db 74 ipcp_options ipcp_gotoptions[NUM_PPP]; /* Options that peer ack'd */
donatien 0:b802fc31f1db 75 ipcp_options ipcp_allowoptions[NUM_PPP]; /* Options we allow peer to request */
donatien 0:b802fc31f1db 76 ipcp_options ipcp_hisoptions[NUM_PPP]; /* Options that we ack'd */
donatien 0:b802fc31f1db 77
donatien 0:b802fc31f1db 78 /* local vars */
donatien 0:b802fc31f1db 79 static int default_route_set[NUM_PPP]; /* Have set up a default route */
donatien 0:b802fc31f1db 80 static int cis_received[NUM_PPP]; /* # Conf-Reqs received */
donatien 0:b802fc31f1db 81
donatien 0:b802fc31f1db 82
donatien 0:b802fc31f1db 83 /*
donatien 0:b802fc31f1db 84 * Callbacks for fsm code. (CI = Configuration Information)
donatien 0:b802fc31f1db 85 */
donatien 0:b802fc31f1db 86 static void ipcp_resetci (fsm *); /* Reset our CI */
donatien 0:b802fc31f1db 87 static int ipcp_cilen (fsm *); /* Return length of our CI */
donatien 0:b802fc31f1db 88 static void ipcp_addci (fsm *, u_char *, int *); /* Add our CI */
donatien 0:b802fc31f1db 89 static int ipcp_ackci (fsm *, u_char *, int); /* Peer ack'd our CI */
donatien 0:b802fc31f1db 90 static int ipcp_nakci (fsm *, u_char *, int); /* Peer nak'd our CI */
donatien 0:b802fc31f1db 91 static int ipcp_rejci (fsm *, u_char *, int); /* Peer rej'd our CI */
donatien 0:b802fc31f1db 92 static int ipcp_reqci (fsm *, u_char *, int *, int); /* Rcv CI */
donatien 0:b802fc31f1db 93 static void ipcp_up (fsm *); /* We're UP */
donatien 0:b802fc31f1db 94 static void ipcp_down (fsm *); /* We're DOWN */
donatien 0:b802fc31f1db 95 #if PPP_ADDITIONAL_CALLBACKS
donatien 0:b802fc31f1db 96 static void ipcp_script (fsm *, char *); /* Run an up/down script */
donatien 0:b802fc31f1db 97 #endif
donatien 0:b802fc31f1db 98 static void ipcp_finished (fsm *); /* Don't need lower layer */
donatien 0:b802fc31f1db 99
donatien 0:b802fc31f1db 100
donatien 0:b802fc31f1db 101 fsm ipcp_fsm[NUM_PPP]; /* IPCP fsm structure */
donatien 0:b802fc31f1db 102
donatien 0:b802fc31f1db 103
donatien 0:b802fc31f1db 104 static fsm_callbacks ipcp_callbacks = { /* IPCP callback routines */
donatien 0:b802fc31f1db 105 ipcp_resetci, /* Reset our Configuration Information */
donatien 0:b802fc31f1db 106 ipcp_cilen, /* Length of our Configuration Information */
donatien 0:b802fc31f1db 107 ipcp_addci, /* Add our Configuration Information */
donatien 0:b802fc31f1db 108 ipcp_ackci, /* ACK our Configuration Information */
donatien 0:b802fc31f1db 109 ipcp_nakci, /* NAK our Configuration Information */
donatien 0:b802fc31f1db 110 ipcp_rejci, /* Reject our Configuration Information */
donatien 0:b802fc31f1db 111 ipcp_reqci, /* Request peer's Configuration Information */
donatien 0:b802fc31f1db 112 ipcp_up, /* Called when fsm reaches LS_OPENED state */
donatien 0:b802fc31f1db 113 ipcp_down, /* Called when fsm leaves LS_OPENED state */
donatien 0:b802fc31f1db 114 NULL, /* Called when we want the lower layer up */
donatien 0:b802fc31f1db 115 ipcp_finished, /* Called when we want the lower layer down */
donatien 0:b802fc31f1db 116 NULL, /* Called when Protocol-Reject received */
donatien 0:b802fc31f1db 117 NULL, /* Retransmission is necessary */
donatien 0:b802fc31f1db 118 NULL, /* Called to handle protocol-specific codes */
donatien 0:b802fc31f1db 119 "IPCP" /* String name of protocol */
donatien 0:b802fc31f1db 120 };
donatien 0:b802fc31f1db 121
donatien 0:b802fc31f1db 122 /*
donatien 0:b802fc31f1db 123 * Protocol entry points from main code.
donatien 0:b802fc31f1db 124 */
donatien 0:b802fc31f1db 125 static void ipcp_init (int);
donatien 0:b802fc31f1db 126 static void ipcp_open (int);
donatien 0:b802fc31f1db 127 static void ipcp_close (int, char *);
donatien 0:b802fc31f1db 128 static void ipcp_lowerup (int);
donatien 0:b802fc31f1db 129 static void ipcp_lowerdown (int);
donatien 0:b802fc31f1db 130 static void ipcp_input (int, u_char *, int);
donatien 0:b802fc31f1db 131 static void ipcp_protrej (int);
donatien 0:b802fc31f1db 132
donatien 0:b802fc31f1db 133
donatien 0:b802fc31f1db 134 struct protent ipcp_protent = {
donatien 0:b802fc31f1db 135 PPP_IPCP,
donatien 0:b802fc31f1db 136 ipcp_init,
donatien 0:b802fc31f1db 137 ipcp_input,
donatien 0:b802fc31f1db 138 ipcp_protrej,
donatien 0:b802fc31f1db 139 ipcp_lowerup,
donatien 0:b802fc31f1db 140 ipcp_lowerdown,
donatien 0:b802fc31f1db 141 ipcp_open,
donatien 0:b802fc31f1db 142 ipcp_close,
donatien 0:b802fc31f1db 143 #if PPP_ADDITIONAL_CALLBACKS
donatien 0:b802fc31f1db 144 ipcp_printpkt,
donatien 0:b802fc31f1db 145 NULL,
donatien 0:b802fc31f1db 146 #endif /* PPP_ADDITIONAL_CALLBACKS */
donatien 0:b802fc31f1db 147 1,
donatien 0:b802fc31f1db 148 "IPCP",
donatien 0:b802fc31f1db 149 #if PPP_ADDITIONAL_CALLBACKS
donatien 0:b802fc31f1db 150 ip_check_options,
donatien 0:b802fc31f1db 151 NULL,
donatien 0:b802fc31f1db 152 ip_active_pkt
donatien 0:b802fc31f1db 153 #endif /* PPP_ADDITIONAL_CALLBACKS */
donatien 0:b802fc31f1db 154 };
donatien 0:b802fc31f1db 155
donatien 0:b802fc31f1db 156 static void ipcp_clear_addrs (int);
donatien 0:b802fc31f1db 157
donatien 0:b802fc31f1db 158 /*
donatien 0:b802fc31f1db 159 * Lengths of configuration options.
donatien 0:b802fc31f1db 160 */
donatien 0:b802fc31f1db 161 #define CILEN_VOID 2
donatien 0:b802fc31f1db 162 #define CILEN_COMPRESS 4 /* min length for compression protocol opt. */
donatien 0:b802fc31f1db 163 #define CILEN_VJ 6 /* length for RFC1332 Van-Jacobson opt. */
donatien 0:b802fc31f1db 164 #define CILEN_ADDR 6 /* new-style single address option */
donatien 0:b802fc31f1db 165 #define CILEN_ADDRS 10 /* old-style dual address option */
donatien 0:b802fc31f1db 166
donatien 0:b802fc31f1db 167
donatien 0:b802fc31f1db 168 #define CODENAME(x) ((x) == CONFACK ? "ACK" : \
donatien 0:b802fc31f1db 169 (x) == CONFNAK ? "NAK" : "REJ")
donatien 0:b802fc31f1db 170
donatien 0:b802fc31f1db 171
donatien 0:b802fc31f1db 172 /*
donatien 0:b802fc31f1db 173 * ipcp_init - Initialize IPCP.
donatien 0:b802fc31f1db 174 */
donatien 0:b802fc31f1db 175 static void
donatien 0:b802fc31f1db 176 ipcp_init(int unit)
donatien 0:b802fc31f1db 177 {
donatien 0:b802fc31f1db 178 fsm *f = &ipcp_fsm[unit];
donatien 0:b802fc31f1db 179 ipcp_options *wo = &ipcp_wantoptions[unit];
donatien 0:b802fc31f1db 180 ipcp_options *ao = &ipcp_allowoptions[unit];
donatien 0:b802fc31f1db 181
donatien 0:b802fc31f1db 182 f->unit = unit;
donatien 0:b802fc31f1db 183 f->protocol = PPP_IPCP;
donatien 0:b802fc31f1db 184 f->callbacks = &ipcp_callbacks;
donatien 0:b802fc31f1db 185 fsm_init(&ipcp_fsm[unit]);
donatien 0:b802fc31f1db 186
donatien 0:b802fc31f1db 187 memset(wo, 0, sizeof(*wo));
donatien 0:b802fc31f1db 188 memset(ao, 0, sizeof(*ao));
donatien 0:b802fc31f1db 189
donatien 0:b802fc31f1db 190 wo->neg_addr = 1;
donatien 0:b802fc31f1db 191 wo->ouraddr = 0;
donatien 0:b802fc31f1db 192 #if VJ_SUPPORT
donatien 0:b802fc31f1db 193 wo->neg_vj = 1;
donatien 0:b802fc31f1db 194 #else /* VJ_SUPPORT */
donatien 0:b802fc31f1db 195 wo->neg_vj = 0;
donatien 0:b802fc31f1db 196 #endif /* VJ_SUPPORT */
donatien 0:b802fc31f1db 197 wo->vj_protocol = IPCP_VJ_COMP;
donatien 0:b802fc31f1db 198 wo->maxslotindex = MAX_SLOTS - 1;
donatien 0:b802fc31f1db 199 wo->cflag = 0;
donatien 0:b802fc31f1db 200 wo->default_route = 1;
donatien 0:b802fc31f1db 201
donatien 0:b802fc31f1db 202 ao->neg_addr = 1;
donatien 0:b802fc31f1db 203 #if VJ_SUPPORT
donatien 0:b802fc31f1db 204 ao->neg_vj = 1;
donatien 0:b802fc31f1db 205 #else /* VJ_SUPPORT */
donatien 0:b802fc31f1db 206 ao->neg_vj = 0;
donatien 0:b802fc31f1db 207 #endif /* VJ_SUPPORT */
donatien 0:b802fc31f1db 208 ao->maxslotindex = MAX_SLOTS - 1;
donatien 0:b802fc31f1db 209 ao->cflag = 1;
donatien 0:b802fc31f1db 210 ao->default_route = 1;
donatien 0:b802fc31f1db 211 }
donatien 0:b802fc31f1db 212
donatien 0:b802fc31f1db 213
donatien 0:b802fc31f1db 214 /*
donatien 0:b802fc31f1db 215 * ipcp_open - IPCP is allowed to come up.
donatien 0:b802fc31f1db 216 */
donatien 0:b802fc31f1db 217 static void
donatien 0:b802fc31f1db 218 ipcp_open(int unit)
donatien 0:b802fc31f1db 219 {
donatien 0:b802fc31f1db 220 fsm_open(&ipcp_fsm[unit]);
donatien 0:b802fc31f1db 221 }
donatien 0:b802fc31f1db 222
donatien 0:b802fc31f1db 223
donatien 0:b802fc31f1db 224 /*
donatien 0:b802fc31f1db 225 * ipcp_close - Take IPCP down.
donatien 0:b802fc31f1db 226 */
donatien 0:b802fc31f1db 227 static void
donatien 0:b802fc31f1db 228 ipcp_close(int unit, char *reason)
donatien 0:b802fc31f1db 229 {
donatien 0:b802fc31f1db 230 fsm_close(&ipcp_fsm[unit], reason);
donatien 0:b802fc31f1db 231 }
donatien 0:b802fc31f1db 232
donatien 0:b802fc31f1db 233
donatien 0:b802fc31f1db 234 /*
donatien 0:b802fc31f1db 235 * ipcp_lowerup - The lower layer is up.
donatien 0:b802fc31f1db 236 */
donatien 0:b802fc31f1db 237 static void
donatien 0:b802fc31f1db 238 ipcp_lowerup(int unit)
donatien 0:b802fc31f1db 239 {
donatien 0:b802fc31f1db 240 fsm_lowerup(&ipcp_fsm[unit]);
donatien 0:b802fc31f1db 241 }
donatien 0:b802fc31f1db 242
donatien 0:b802fc31f1db 243
donatien 0:b802fc31f1db 244 /*
donatien 0:b802fc31f1db 245 * ipcp_lowerdown - The lower layer is down.
donatien 0:b802fc31f1db 246 */
donatien 0:b802fc31f1db 247 static void
donatien 0:b802fc31f1db 248 ipcp_lowerdown(int unit)
donatien 0:b802fc31f1db 249 {
donatien 0:b802fc31f1db 250 fsm_lowerdown(&ipcp_fsm[unit]);
donatien 0:b802fc31f1db 251 }
donatien 0:b802fc31f1db 252
donatien 0:b802fc31f1db 253
donatien 0:b802fc31f1db 254 /*
donatien 0:b802fc31f1db 255 * ipcp_input - Input IPCP packet.
donatien 0:b802fc31f1db 256 */
donatien 0:b802fc31f1db 257 static void
donatien 0:b802fc31f1db 258 ipcp_input(int unit, u_char *p, int len)
donatien 0:b802fc31f1db 259 {
donatien 0:b802fc31f1db 260 fsm_input(&ipcp_fsm[unit], p, len);
donatien 0:b802fc31f1db 261 }
donatien 0:b802fc31f1db 262
donatien 0:b802fc31f1db 263
donatien 0:b802fc31f1db 264 /*
donatien 0:b802fc31f1db 265 * ipcp_protrej - A Protocol-Reject was received for IPCP.
donatien 0:b802fc31f1db 266 *
donatien 0:b802fc31f1db 267 * Pretend the lower layer went down, so we shut up.
donatien 0:b802fc31f1db 268 */
donatien 0:b802fc31f1db 269 static void
donatien 0:b802fc31f1db 270 ipcp_protrej(int unit)
donatien 0:b802fc31f1db 271 {
donatien 0:b802fc31f1db 272 fsm_lowerdown(&ipcp_fsm[unit]);
donatien 0:b802fc31f1db 273 }
donatien 0:b802fc31f1db 274
donatien 0:b802fc31f1db 275
donatien 0:b802fc31f1db 276 /*
donatien 0:b802fc31f1db 277 * ipcp_resetci - Reset our CI.
donatien 0:b802fc31f1db 278 */
donatien 0:b802fc31f1db 279 static void
donatien 0:b802fc31f1db 280 ipcp_resetci(fsm *f)
donatien 0:b802fc31f1db 281 {
donatien 0:b802fc31f1db 282 ipcp_options *wo = &ipcp_wantoptions[f->unit];
donatien 0:b802fc31f1db 283
donatien 0:b802fc31f1db 284 wo->req_addr = wo->neg_addr && ipcp_allowoptions[f->unit].neg_addr;
donatien 0:b802fc31f1db 285 if (wo->ouraddr == 0) {
donatien 0:b802fc31f1db 286 wo->accept_local = 1;
donatien 0:b802fc31f1db 287 }
donatien 0:b802fc31f1db 288 if (wo->hisaddr == 0) {
donatien 0:b802fc31f1db 289 wo->accept_remote = 1;
donatien 0:b802fc31f1db 290 }
donatien 0:b802fc31f1db 291 /* Request DNS addresses from the peer */
donatien 0:b802fc31f1db 292 wo->req_dns1 = ppp_settings.usepeerdns;
donatien 0:b802fc31f1db 293 wo->req_dns2 = ppp_settings.usepeerdns;
donatien 0:b802fc31f1db 294 ipcp_gotoptions[f->unit] = *wo;
donatien 0:b802fc31f1db 295 cis_received[f->unit] = 0;
donatien 0:b802fc31f1db 296 }
donatien 0:b802fc31f1db 297
donatien 0:b802fc31f1db 298
donatien 0:b802fc31f1db 299 /*
donatien 0:b802fc31f1db 300 * ipcp_cilen - Return length of our CI.
donatien 0:b802fc31f1db 301 */
donatien 0:b802fc31f1db 302 static int
donatien 0:b802fc31f1db 303 ipcp_cilen(fsm *f)
donatien 0:b802fc31f1db 304 {
donatien 0:b802fc31f1db 305 ipcp_options *go = &ipcp_gotoptions[f->unit];
donatien 0:b802fc31f1db 306 ipcp_options *wo = &ipcp_wantoptions[f->unit];
donatien 0:b802fc31f1db 307 ipcp_options *ho = &ipcp_hisoptions[f->unit];
donatien 0:b802fc31f1db 308
donatien 0:b802fc31f1db 309 #define LENCIVJ(neg, old) (neg ? (old? CILEN_COMPRESS : CILEN_VJ) : 0)
donatien 0:b802fc31f1db 310 #define LENCIADDR(neg, old) (neg ? (old? CILEN_ADDRS : CILEN_ADDR) : 0)
donatien 0:b802fc31f1db 311 #define LENCIDNS(neg) (neg ? (CILEN_ADDR) : 0)
donatien 0:b802fc31f1db 312
donatien 0:b802fc31f1db 313 /*
donatien 0:b802fc31f1db 314 * First see if we want to change our options to the old
donatien 0:b802fc31f1db 315 * forms because we have received old forms from the peer.
donatien 0:b802fc31f1db 316 */
donatien 0:b802fc31f1db 317 if (wo->neg_addr && !go->neg_addr && !go->old_addrs) {
donatien 0:b802fc31f1db 318 /* use the old style of address negotiation */
donatien 0:b802fc31f1db 319 go->neg_addr = 1;
donatien 0:b802fc31f1db 320 go->old_addrs = 1;
donatien 0:b802fc31f1db 321 }
donatien 0:b802fc31f1db 322 if (wo->neg_vj && !go->neg_vj && !go->old_vj) {
donatien 0:b802fc31f1db 323 /* try an older style of VJ negotiation */
donatien 0:b802fc31f1db 324 if (cis_received[f->unit] == 0) {
donatien 0:b802fc31f1db 325 /* keep trying the new style until we see some CI from the peer */
donatien 0:b802fc31f1db 326 go->neg_vj = 1;
donatien 0:b802fc31f1db 327 } else {
donatien 0:b802fc31f1db 328 /* use the old style only if the peer did */
donatien 0:b802fc31f1db 329 if (ho->neg_vj && ho->old_vj) {
donatien 0:b802fc31f1db 330 go->neg_vj = 1;
donatien 0:b802fc31f1db 331 go->old_vj = 1;
donatien 0:b802fc31f1db 332 go->vj_protocol = ho->vj_protocol;
donatien 0:b802fc31f1db 333 }
donatien 0:b802fc31f1db 334 }
donatien 0:b802fc31f1db 335 }
donatien 0:b802fc31f1db 336
donatien 0:b802fc31f1db 337 return (LENCIADDR(go->neg_addr, go->old_addrs) +
donatien 0:b802fc31f1db 338 LENCIVJ(go->neg_vj, go->old_vj) +
donatien 0:b802fc31f1db 339 LENCIDNS(go->req_dns1) +
donatien 0:b802fc31f1db 340 LENCIDNS(go->req_dns2));
donatien 0:b802fc31f1db 341 }
donatien 0:b802fc31f1db 342
donatien 0:b802fc31f1db 343
donatien 0:b802fc31f1db 344 /*
donatien 0:b802fc31f1db 345 * ipcp_addci - Add our desired CIs to a packet.
donatien 0:b802fc31f1db 346 */
donatien 0:b802fc31f1db 347 static void
donatien 0:b802fc31f1db 348 ipcp_addci(fsm *f, u_char *ucp, int *lenp)
donatien 0:b802fc31f1db 349 {
donatien 0:b802fc31f1db 350 ipcp_options *go = &ipcp_gotoptions[f->unit];
donatien 0:b802fc31f1db 351 int len = *lenp;
donatien 0:b802fc31f1db 352
donatien 0:b802fc31f1db 353 #define ADDCIVJ(opt, neg, val, old, maxslotindex, cflag) \
donatien 0:b802fc31f1db 354 if (neg) { \
donatien 0:b802fc31f1db 355 int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \
donatien 0:b802fc31f1db 356 if (len >= vjlen) { \
donatien 0:b802fc31f1db 357 PUTCHAR(opt, ucp); \
donatien 0:b802fc31f1db 358 PUTCHAR(vjlen, ucp); \
donatien 0:b802fc31f1db 359 PUTSHORT(val, ucp); \
donatien 0:b802fc31f1db 360 if (!old) { \
donatien 0:b802fc31f1db 361 PUTCHAR(maxslotindex, ucp); \
donatien 0:b802fc31f1db 362 PUTCHAR(cflag, ucp); \
donatien 0:b802fc31f1db 363 } \
donatien 0:b802fc31f1db 364 len -= vjlen; \
donatien 0:b802fc31f1db 365 } else { \
donatien 0:b802fc31f1db 366 neg = 0; \
donatien 0:b802fc31f1db 367 } \
donatien 0:b802fc31f1db 368 }
donatien 0:b802fc31f1db 369
donatien 0:b802fc31f1db 370 #define ADDCIADDR(opt, neg, old, val1, val2) \
donatien 0:b802fc31f1db 371 if (neg) { \
donatien 0:b802fc31f1db 372 int addrlen = (old? CILEN_ADDRS: CILEN_ADDR); \
donatien 0:b802fc31f1db 373 if (len >= addrlen) { \
donatien 0:b802fc31f1db 374 u32_t l; \
donatien 0:b802fc31f1db 375 PUTCHAR(opt, ucp); \
donatien 0:b802fc31f1db 376 PUTCHAR(addrlen, ucp); \
donatien 0:b802fc31f1db 377 l = ntohl(val1); \
donatien 0:b802fc31f1db 378 PUTLONG(l, ucp); \
donatien 0:b802fc31f1db 379 if (old) { \
donatien 0:b802fc31f1db 380 l = ntohl(val2); \
donatien 0:b802fc31f1db 381 PUTLONG(l, ucp); \
donatien 0:b802fc31f1db 382 } \
donatien 0:b802fc31f1db 383 len -= addrlen; \
donatien 0:b802fc31f1db 384 } else { \
donatien 0:b802fc31f1db 385 neg = 0; \
donatien 0:b802fc31f1db 386 } \
donatien 0:b802fc31f1db 387 }
donatien 0:b802fc31f1db 388
donatien 0:b802fc31f1db 389 #define ADDCIDNS(opt, neg, addr) \
donatien 0:b802fc31f1db 390 if (neg) { \
donatien 0:b802fc31f1db 391 if (len >= CILEN_ADDR) { \
donatien 0:b802fc31f1db 392 u32_t l; \
donatien 0:b802fc31f1db 393 PUTCHAR(opt, ucp); \
donatien 0:b802fc31f1db 394 PUTCHAR(CILEN_ADDR, ucp); \
donatien 0:b802fc31f1db 395 l = ntohl(addr); \
donatien 0:b802fc31f1db 396 PUTLONG(l, ucp); \
donatien 0:b802fc31f1db 397 len -= CILEN_ADDR; \
donatien 0:b802fc31f1db 398 } else { \
donatien 0:b802fc31f1db 399 neg = 0; \
donatien 0:b802fc31f1db 400 } \
donatien 0:b802fc31f1db 401 }
donatien 0:b802fc31f1db 402
donatien 0:b802fc31f1db 403 ADDCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), go->neg_addr,
donatien 0:b802fc31f1db 404 go->old_addrs, go->ouraddr, go->hisaddr);
donatien 0:b802fc31f1db 405
donatien 0:b802fc31f1db 406 ADDCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj,
donatien 0:b802fc31f1db 407 go->maxslotindex, go->cflag);
donatien 0:b802fc31f1db 408
donatien 0:b802fc31f1db 409 ADDCIDNS(CI_MS_DNS1, go->req_dns1, go->dnsaddr[0]);
donatien 0:b802fc31f1db 410
donatien 0:b802fc31f1db 411 ADDCIDNS(CI_MS_DNS2, go->req_dns2, go->dnsaddr[1]);
donatien 0:b802fc31f1db 412
donatien 0:b802fc31f1db 413 *lenp -= len;
donatien 0:b802fc31f1db 414 }
donatien 0:b802fc31f1db 415
donatien 0:b802fc31f1db 416
donatien 0:b802fc31f1db 417 /*
donatien 0:b802fc31f1db 418 * ipcp_ackci - Ack our CIs.
donatien 0:b802fc31f1db 419 *
donatien 0:b802fc31f1db 420 * Returns:
donatien 0:b802fc31f1db 421 * 0 - Ack was bad.
donatien 0:b802fc31f1db 422 * 1 - Ack was good.
donatien 0:b802fc31f1db 423 */
donatien 0:b802fc31f1db 424 static int
donatien 0:b802fc31f1db 425 ipcp_ackci(fsm *f, u_char *p, int len)
donatien 0:b802fc31f1db 426 {
donatien 0:b802fc31f1db 427 ipcp_options *go = &ipcp_gotoptions[f->unit];
donatien 0:b802fc31f1db 428 u_short cilen, citype, cishort;
donatien 0:b802fc31f1db 429 u32_t cilong;
donatien 0:b802fc31f1db 430 u_char cimaxslotindex, cicflag;
donatien 0:b802fc31f1db 431
donatien 0:b802fc31f1db 432 /*
donatien 0:b802fc31f1db 433 * CIs must be in exactly the same order that we sent...
donatien 0:b802fc31f1db 434 * Check packet length and CI length at each step.
donatien 0:b802fc31f1db 435 * If we find any deviations, then this packet is bad.
donatien 0:b802fc31f1db 436 */
donatien 0:b802fc31f1db 437
donatien 0:b802fc31f1db 438 #define ACKCIVJ(opt, neg, val, old, maxslotindex, cflag) \
donatien 0:b802fc31f1db 439 if (neg) { \
donatien 0:b802fc31f1db 440 int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \
donatien 0:b802fc31f1db 441 if ((len -= vjlen) < 0) { \
donatien 0:b802fc31f1db 442 goto bad; \
donatien 0:b802fc31f1db 443 } \
donatien 0:b802fc31f1db 444 GETCHAR(citype, p); \
donatien 0:b802fc31f1db 445 GETCHAR(cilen, p); \
donatien 0:b802fc31f1db 446 if (cilen != vjlen || \
donatien 0:b802fc31f1db 447 citype != opt) { \
donatien 0:b802fc31f1db 448 goto bad; \
donatien 0:b802fc31f1db 449 } \
donatien 0:b802fc31f1db 450 GETSHORT(cishort, p); \
donatien 0:b802fc31f1db 451 if (cishort != val) { \
donatien 0:b802fc31f1db 452 goto bad; \
donatien 0:b802fc31f1db 453 } \
donatien 0:b802fc31f1db 454 if (!old) { \
donatien 0:b802fc31f1db 455 GETCHAR(cimaxslotindex, p); \
donatien 0:b802fc31f1db 456 if (cimaxslotindex != maxslotindex) { \
donatien 0:b802fc31f1db 457 goto bad; \
donatien 0:b802fc31f1db 458 } \
donatien 0:b802fc31f1db 459 GETCHAR(cicflag, p); \
donatien 0:b802fc31f1db 460 if (cicflag != cflag) { \
donatien 0:b802fc31f1db 461 goto bad; \
donatien 0:b802fc31f1db 462 } \
donatien 0:b802fc31f1db 463 } \
donatien 0:b802fc31f1db 464 }
donatien 0:b802fc31f1db 465
donatien 0:b802fc31f1db 466 #define ACKCIADDR(opt, neg, old, val1, val2) \
donatien 0:b802fc31f1db 467 if (neg) { \
donatien 0:b802fc31f1db 468 int addrlen = (old? CILEN_ADDRS: CILEN_ADDR); \
donatien 0:b802fc31f1db 469 u32_t l; \
donatien 0:b802fc31f1db 470 if ((len -= addrlen) < 0) { \
donatien 0:b802fc31f1db 471 goto bad; \
donatien 0:b802fc31f1db 472 } \
donatien 0:b802fc31f1db 473 GETCHAR(citype, p); \
donatien 0:b802fc31f1db 474 GETCHAR(cilen, p); \
donatien 0:b802fc31f1db 475 if (cilen != addrlen || \
donatien 0:b802fc31f1db 476 citype != opt) { \
donatien 0:b802fc31f1db 477 goto bad; \
donatien 0:b802fc31f1db 478 } \
donatien 0:b802fc31f1db 479 GETLONG(l, p); \
donatien 0:b802fc31f1db 480 cilong = htonl(l); \
donatien 0:b802fc31f1db 481 if (val1 != cilong) { \
donatien 0:b802fc31f1db 482 goto bad; \
donatien 0:b802fc31f1db 483 } \
donatien 0:b802fc31f1db 484 if (old) { \
donatien 0:b802fc31f1db 485 GETLONG(l, p); \
donatien 0:b802fc31f1db 486 cilong = htonl(l); \
donatien 0:b802fc31f1db 487 if (val2 != cilong) { \
donatien 0:b802fc31f1db 488 goto bad; \
donatien 0:b802fc31f1db 489 } \
donatien 0:b802fc31f1db 490 } \
donatien 0:b802fc31f1db 491 }
donatien 0:b802fc31f1db 492
donatien 0:b802fc31f1db 493 #define ACKCIDNS(opt, neg, addr) \
donatien 0:b802fc31f1db 494 if (neg) { \
donatien 0:b802fc31f1db 495 u32_t l; \
donatien 0:b802fc31f1db 496 if ((len -= CILEN_ADDR) < 0) { \
donatien 0:b802fc31f1db 497 goto bad; \
donatien 0:b802fc31f1db 498 } \
donatien 0:b802fc31f1db 499 GETCHAR(citype, p); \
donatien 0:b802fc31f1db 500 GETCHAR(cilen, p); \
donatien 0:b802fc31f1db 501 if (cilen != CILEN_ADDR || \
donatien 0:b802fc31f1db 502 citype != opt) { \
donatien 0:b802fc31f1db 503 goto bad; \
donatien 0:b802fc31f1db 504 } \
donatien 0:b802fc31f1db 505 GETLONG(l, p); \
donatien 0:b802fc31f1db 506 cilong = htonl(l); \
donatien 0:b802fc31f1db 507 if (addr != cilong) { \
donatien 0:b802fc31f1db 508 goto bad; \
donatien 0:b802fc31f1db 509 } \
donatien 0:b802fc31f1db 510 }
donatien 0:b802fc31f1db 511
donatien 0:b802fc31f1db 512 ACKCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), go->neg_addr,
donatien 0:b802fc31f1db 513 go->old_addrs, go->ouraddr, go->hisaddr);
donatien 0:b802fc31f1db 514
donatien 0:b802fc31f1db 515 ACKCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj,
donatien 0:b802fc31f1db 516 go->maxslotindex, go->cflag);
donatien 0:b802fc31f1db 517
donatien 0:b802fc31f1db 518 ACKCIDNS(CI_MS_DNS1, go->req_dns1, go->dnsaddr[0]);
donatien 0:b802fc31f1db 519
donatien 0:b802fc31f1db 520 ACKCIDNS(CI_MS_DNS2, go->req_dns2, go->dnsaddr[1]);
donatien 0:b802fc31f1db 521
donatien 0:b802fc31f1db 522 /*
donatien 0:b802fc31f1db 523 * If there are any remaining CIs, then this packet is bad.
donatien 0:b802fc31f1db 524 */
donatien 0:b802fc31f1db 525 if (len != 0) {
donatien 0:b802fc31f1db 526 goto bad;
donatien 0:b802fc31f1db 527 }
donatien 0:b802fc31f1db 528 return (1);
donatien 0:b802fc31f1db 529
donatien 0:b802fc31f1db 530 bad:
donatien 0:b802fc31f1db 531 IPCPDEBUG(LOG_INFO, ("ipcp_ackci: received bad Ack!\n"));
donatien 0:b802fc31f1db 532 return (0);
donatien 0:b802fc31f1db 533 }
donatien 0:b802fc31f1db 534
donatien 0:b802fc31f1db 535 /*
donatien 0:b802fc31f1db 536 * ipcp_nakci - Peer has sent a NAK for some of our CIs.
donatien 0:b802fc31f1db 537 * This should not modify any state if the Nak is bad
donatien 0:b802fc31f1db 538 * or if IPCP is in the LS_OPENED state.
donatien 0:b802fc31f1db 539 *
donatien 0:b802fc31f1db 540 * Returns:
donatien 0:b802fc31f1db 541 * 0 - Nak was bad.
donatien 0:b802fc31f1db 542 * 1 - Nak was good.
donatien 0:b802fc31f1db 543 */
donatien 0:b802fc31f1db 544 static int
donatien 0:b802fc31f1db 545 ipcp_nakci(fsm *f, u_char *p, int len)
donatien 0:b802fc31f1db 546 {
donatien 0:b802fc31f1db 547 ipcp_options *go = &ipcp_gotoptions[f->unit];
donatien 0:b802fc31f1db 548 u_char cimaxslotindex, cicflag;
donatien 0:b802fc31f1db 549 u_char citype, cilen, *next;
donatien 0:b802fc31f1db 550 u_short cishort;
donatien 0:b802fc31f1db 551 u32_t ciaddr1, ciaddr2, l, cidnsaddr;
donatien 0:b802fc31f1db 552 ipcp_options no; /* options we've seen Naks for */
donatien 0:b802fc31f1db 553 ipcp_options try; /* options to request next time */
donatien 0:b802fc31f1db 554
donatien 0:b802fc31f1db 555 BZERO(&no, sizeof(no));
donatien 0:b802fc31f1db 556 try = *go;
donatien 0:b802fc31f1db 557
donatien 0:b802fc31f1db 558 /*
donatien 0:b802fc31f1db 559 * Any Nak'd CIs must be in exactly the same order that we sent.
donatien 0:b802fc31f1db 560 * Check packet length and CI length at each step.
donatien 0:b802fc31f1db 561 * If we find any deviations, then this packet is bad.
donatien 0:b802fc31f1db 562 */
donatien 0:b802fc31f1db 563 #define NAKCIADDR(opt, neg, old, code) \
donatien 0:b802fc31f1db 564 if (go->neg && \
donatien 0:b802fc31f1db 565 len >= (cilen = (old? CILEN_ADDRS: CILEN_ADDR)) && \
donatien 0:b802fc31f1db 566 p[1] == cilen && \
donatien 0:b802fc31f1db 567 p[0] == opt) { \
donatien 0:b802fc31f1db 568 len -= cilen; \
donatien 0:b802fc31f1db 569 INCPTR(2, p); \
donatien 0:b802fc31f1db 570 GETLONG(l, p); \
donatien 0:b802fc31f1db 571 ciaddr1 = htonl(l); \
donatien 0:b802fc31f1db 572 if (old) { \
donatien 0:b802fc31f1db 573 GETLONG(l, p); \
donatien 0:b802fc31f1db 574 ciaddr2 = htonl(l); \
donatien 0:b802fc31f1db 575 no.old_addrs = 1; \
donatien 0:b802fc31f1db 576 } else { \
donatien 0:b802fc31f1db 577 ciaddr2 = 0; \
donatien 0:b802fc31f1db 578 } \
donatien 0:b802fc31f1db 579 no.neg = 1; \
donatien 0:b802fc31f1db 580 code \
donatien 0:b802fc31f1db 581 }
donatien 0:b802fc31f1db 582
donatien 0:b802fc31f1db 583 #define NAKCIVJ(opt, neg, code) \
donatien 0:b802fc31f1db 584 if (go->neg && \
donatien 0:b802fc31f1db 585 ((cilen = p[1]) == CILEN_COMPRESS || cilen == CILEN_VJ) && \
donatien 0:b802fc31f1db 586 len >= cilen && \
donatien 0:b802fc31f1db 587 p[0] == opt) { \
donatien 0:b802fc31f1db 588 len -= cilen; \
donatien 0:b802fc31f1db 589 INCPTR(2, p); \
donatien 0:b802fc31f1db 590 GETSHORT(cishort, p); \
donatien 0:b802fc31f1db 591 no.neg = 1; \
donatien 0:b802fc31f1db 592 code \
donatien 0:b802fc31f1db 593 }
donatien 0:b802fc31f1db 594
donatien 0:b802fc31f1db 595 #define NAKCIDNS(opt, neg, code) \
donatien 0:b802fc31f1db 596 if (go->neg && \
donatien 0:b802fc31f1db 597 ((cilen = p[1]) == CILEN_ADDR) && \
donatien 0:b802fc31f1db 598 len >= cilen && \
donatien 0:b802fc31f1db 599 p[0] == opt) { \
donatien 0:b802fc31f1db 600 len -= cilen; \
donatien 0:b802fc31f1db 601 INCPTR(2, p); \
donatien 0:b802fc31f1db 602 GETLONG(l, p); \
donatien 0:b802fc31f1db 603 cidnsaddr = htonl(l); \
donatien 0:b802fc31f1db 604 no.neg = 1; \
donatien 0:b802fc31f1db 605 code \
donatien 0:b802fc31f1db 606 }
donatien 0:b802fc31f1db 607
donatien 0:b802fc31f1db 608 /*
donatien 0:b802fc31f1db 609 * Accept the peer's idea of {our,his} address, if different
donatien 0:b802fc31f1db 610 * from our idea, only if the accept_{local,remote} flag is set.
donatien 0:b802fc31f1db 611 */
donatien 0:b802fc31f1db 612 NAKCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), neg_addr, go->old_addrs,
donatien 0:b802fc31f1db 613 if (go->accept_local && ciaddr1) { /* Do we know our address? */
donatien 0:b802fc31f1db 614 try.ouraddr = ciaddr1;
donatien 0:b802fc31f1db 615 IPCPDEBUG(LOG_INFO, ("local IP address %s\n",
donatien 0:b802fc31f1db 616 inet_ntoa(ciaddr1)));
donatien 0:b802fc31f1db 617 }
donatien 0:b802fc31f1db 618 if (go->accept_remote && ciaddr2) { /* Does he know his? */
donatien 0:b802fc31f1db 619 try.hisaddr = ciaddr2;
donatien 0:b802fc31f1db 620 IPCPDEBUG(LOG_INFO, ("remote IP address %s\n",
donatien 0:b802fc31f1db 621 inet_ntoa(ciaddr2)));
donatien 0:b802fc31f1db 622 }
donatien 0:b802fc31f1db 623 );
donatien 0:b802fc31f1db 624
donatien 0:b802fc31f1db 625 /*
donatien 0:b802fc31f1db 626 * Accept the peer's value of maxslotindex provided that it
donatien 0:b802fc31f1db 627 * is less than what we asked for. Turn off slot-ID compression
donatien 0:b802fc31f1db 628 * if the peer wants. Send old-style compress-type option if
donatien 0:b802fc31f1db 629 * the peer wants.
donatien 0:b802fc31f1db 630 */
donatien 0:b802fc31f1db 631 NAKCIVJ(CI_COMPRESSTYPE, neg_vj,
donatien 0:b802fc31f1db 632 if (cilen == CILEN_VJ) {
donatien 0:b802fc31f1db 633 GETCHAR(cimaxslotindex, p);
donatien 0:b802fc31f1db 634 GETCHAR(cicflag, p);
donatien 0:b802fc31f1db 635 if (cishort == IPCP_VJ_COMP) {
donatien 0:b802fc31f1db 636 try.old_vj = 0;
donatien 0:b802fc31f1db 637 if (cimaxslotindex < go->maxslotindex) {
donatien 0:b802fc31f1db 638 try.maxslotindex = cimaxslotindex;
donatien 0:b802fc31f1db 639 }
donatien 0:b802fc31f1db 640 if (!cicflag) {
donatien 0:b802fc31f1db 641 try.cflag = 0;
donatien 0:b802fc31f1db 642 }
donatien 0:b802fc31f1db 643 } else {
donatien 0:b802fc31f1db 644 try.neg_vj = 0;
donatien 0:b802fc31f1db 645 }
donatien 0:b802fc31f1db 646 } else {
donatien 0:b802fc31f1db 647 if (cishort == IPCP_VJ_COMP || cishort == IPCP_VJ_COMP_OLD) {
donatien 0:b802fc31f1db 648 try.old_vj = 1;
donatien 0:b802fc31f1db 649 try.vj_protocol = cishort;
donatien 0:b802fc31f1db 650 } else {
donatien 0:b802fc31f1db 651 try.neg_vj = 0;
donatien 0:b802fc31f1db 652 }
donatien 0:b802fc31f1db 653 }
donatien 0:b802fc31f1db 654 );
donatien 0:b802fc31f1db 655
donatien 0:b802fc31f1db 656 NAKCIDNS(CI_MS_DNS1, req_dns1,
donatien 0:b802fc31f1db 657 try.dnsaddr[0] = cidnsaddr;
donatien 0:b802fc31f1db 658 IPCPDEBUG(LOG_INFO, ("primary DNS address %s\n", inet_ntoa(cidnsaddr)));
donatien 0:b802fc31f1db 659 );
donatien 0:b802fc31f1db 660
donatien 0:b802fc31f1db 661 NAKCIDNS(CI_MS_DNS2, req_dns2,
donatien 0:b802fc31f1db 662 try.dnsaddr[1] = cidnsaddr;
donatien 0:b802fc31f1db 663 IPCPDEBUG(LOG_INFO, ("secondary DNS address %s\n", inet_ntoa(cidnsaddr)));
donatien 0:b802fc31f1db 664 );
donatien 0:b802fc31f1db 665
donatien 0:b802fc31f1db 666 /*
donatien 0:b802fc31f1db 667 * There may be remaining CIs, if the peer is requesting negotiation
donatien 0:b802fc31f1db 668 * on an option that we didn't include in our request packet.
donatien 0:b802fc31f1db 669 * If they want to negotiate about IP addresses, we comply.
donatien 0:b802fc31f1db 670 * If they want us to ask for compression, we refuse.
donatien 0:b802fc31f1db 671 */
donatien 0:b802fc31f1db 672 while (len > CILEN_VOID) {
donatien 0:b802fc31f1db 673 GETCHAR(citype, p);
donatien 0:b802fc31f1db 674 GETCHAR(cilen, p);
donatien 0:b802fc31f1db 675 if( (len -= cilen) < 0 ) {
donatien 0:b802fc31f1db 676 goto bad;
donatien 0:b802fc31f1db 677 }
donatien 0:b802fc31f1db 678 next = p + cilen - 2;
donatien 0:b802fc31f1db 679
donatien 0:b802fc31f1db 680 switch (citype) {
donatien 0:b802fc31f1db 681 case CI_COMPRESSTYPE:
donatien 0:b802fc31f1db 682 if (go->neg_vj || no.neg_vj ||
donatien 0:b802fc31f1db 683 (cilen != CILEN_VJ && cilen != CILEN_COMPRESS)) {
donatien 0:b802fc31f1db 684 goto bad;
donatien 0:b802fc31f1db 685 }
donatien 0:b802fc31f1db 686 no.neg_vj = 1;
donatien 0:b802fc31f1db 687 break;
donatien 0:b802fc31f1db 688 case CI_ADDRS:
donatien 0:b802fc31f1db 689 if ((go->neg_addr && go->old_addrs) || no.old_addrs
donatien 0:b802fc31f1db 690 || cilen != CILEN_ADDRS) {
donatien 0:b802fc31f1db 691 goto bad;
donatien 0:b802fc31f1db 692 }
donatien 0:b802fc31f1db 693 try.neg_addr = 1;
donatien 0:b802fc31f1db 694 try.old_addrs = 1;
donatien 0:b802fc31f1db 695 GETLONG(l, p);
donatien 0:b802fc31f1db 696 ciaddr1 = htonl(l);
donatien 0:b802fc31f1db 697 if (ciaddr1 && go->accept_local) {
donatien 0:b802fc31f1db 698 try.ouraddr = ciaddr1;
donatien 0:b802fc31f1db 699 }
donatien 0:b802fc31f1db 700 GETLONG(l, p);
donatien 0:b802fc31f1db 701 ciaddr2 = htonl(l);
donatien 0:b802fc31f1db 702 if (ciaddr2 && go->accept_remote) {
donatien 0:b802fc31f1db 703 try.hisaddr = ciaddr2;
donatien 0:b802fc31f1db 704 }
donatien 0:b802fc31f1db 705 no.old_addrs = 1;
donatien 0:b802fc31f1db 706 break;
donatien 0:b802fc31f1db 707 case CI_ADDR:
donatien 0:b802fc31f1db 708 if (go->neg_addr || no.neg_addr || cilen != CILEN_ADDR) {
donatien 0:b802fc31f1db 709 goto bad;
donatien 0:b802fc31f1db 710 }
donatien 0:b802fc31f1db 711 try.old_addrs = 0;
donatien 0:b802fc31f1db 712 GETLONG(l, p);
donatien 0:b802fc31f1db 713 ciaddr1 = htonl(l);
donatien 0:b802fc31f1db 714 if (ciaddr1 && go->accept_local) {
donatien 0:b802fc31f1db 715 try.ouraddr = ciaddr1;
donatien 0:b802fc31f1db 716 }
donatien 0:b802fc31f1db 717 if (try.ouraddr != 0) {
donatien 0:b802fc31f1db 718 try.neg_addr = 1;
donatien 0:b802fc31f1db 719 }
donatien 0:b802fc31f1db 720 no.neg_addr = 1;
donatien 0:b802fc31f1db 721 break;
donatien 0:b802fc31f1db 722 }
donatien 0:b802fc31f1db 723 p = next;
donatien 0:b802fc31f1db 724 }
donatien 0:b802fc31f1db 725
donatien 0:b802fc31f1db 726 /* If there is still anything left, this packet is bad. */
donatien 0:b802fc31f1db 727 if (len != 0) {
donatien 0:b802fc31f1db 728 goto bad;
donatien 0:b802fc31f1db 729 }
donatien 0:b802fc31f1db 730
donatien 0:b802fc31f1db 731 /*
donatien 0:b802fc31f1db 732 * OK, the Nak is good. Now we can update state.
donatien 0:b802fc31f1db 733 */
donatien 0:b802fc31f1db 734 if (f->state != LS_OPENED) {
donatien 0:b802fc31f1db 735 *go = try;
donatien 0:b802fc31f1db 736 }
donatien 0:b802fc31f1db 737
donatien 0:b802fc31f1db 738 return 1;
donatien 0:b802fc31f1db 739
donatien 0:b802fc31f1db 740 bad:
donatien 0:b802fc31f1db 741 IPCPDEBUG(LOG_INFO, ("ipcp_nakci: received bad Nak!\n"));
donatien 0:b802fc31f1db 742 return 0;
donatien 0:b802fc31f1db 743 }
donatien 0:b802fc31f1db 744
donatien 0:b802fc31f1db 745
donatien 0:b802fc31f1db 746 /*
donatien 0:b802fc31f1db 747 * ipcp_rejci - Reject some of our CIs.
donatien 0:b802fc31f1db 748 */
donatien 0:b802fc31f1db 749 static int
donatien 0:b802fc31f1db 750 ipcp_rejci(fsm *f, u_char *p, int len)
donatien 0:b802fc31f1db 751 {
donatien 0:b802fc31f1db 752 ipcp_options *go = &ipcp_gotoptions[f->unit];
donatien 0:b802fc31f1db 753 u_char cimaxslotindex, ciflag, cilen;
donatien 0:b802fc31f1db 754 u_short cishort;
donatien 0:b802fc31f1db 755 u32_t cilong;
donatien 0:b802fc31f1db 756 ipcp_options try; /* options to request next time */
donatien 0:b802fc31f1db 757
donatien 0:b802fc31f1db 758 try = *go;
donatien 0:b802fc31f1db 759 /*
donatien 0:b802fc31f1db 760 * Any Rejected CIs must be in exactly the same order that we sent.
donatien 0:b802fc31f1db 761 * Check packet length and CI length at each step.
donatien 0:b802fc31f1db 762 * If we find any deviations, then this packet is bad.
donatien 0:b802fc31f1db 763 */
donatien 0:b802fc31f1db 764 #define REJCIADDR(opt, neg, old, val1, val2) \
donatien 0:b802fc31f1db 765 if (go->neg && \
donatien 0:b802fc31f1db 766 len >= (cilen = old? CILEN_ADDRS: CILEN_ADDR) && \
donatien 0:b802fc31f1db 767 p[1] == cilen && \
donatien 0:b802fc31f1db 768 p[0] == opt) { \
donatien 0:b802fc31f1db 769 u32_t l; \
donatien 0:b802fc31f1db 770 len -= cilen; \
donatien 0:b802fc31f1db 771 INCPTR(2, p); \
donatien 0:b802fc31f1db 772 GETLONG(l, p); \
donatien 0:b802fc31f1db 773 cilong = htonl(l); \
donatien 0:b802fc31f1db 774 /* Check rejected value. */ \
donatien 0:b802fc31f1db 775 if (cilong != val1) { \
donatien 0:b802fc31f1db 776 goto bad; \
donatien 0:b802fc31f1db 777 } \
donatien 0:b802fc31f1db 778 if (old) { \
donatien 0:b802fc31f1db 779 GETLONG(l, p); \
donatien 0:b802fc31f1db 780 cilong = htonl(l); \
donatien 0:b802fc31f1db 781 /* Check rejected value. */ \
donatien 0:b802fc31f1db 782 if (cilong != val2) { \
donatien 0:b802fc31f1db 783 goto bad; \
donatien 0:b802fc31f1db 784 } \
donatien 0:b802fc31f1db 785 } \
donatien 0:b802fc31f1db 786 try.neg = 0; \
donatien 0:b802fc31f1db 787 }
donatien 0:b802fc31f1db 788
donatien 0:b802fc31f1db 789 #define REJCIVJ(opt, neg, val, old, maxslot, cflag) \
donatien 0:b802fc31f1db 790 if (go->neg && \
donatien 0:b802fc31f1db 791 p[1] == (old? CILEN_COMPRESS : CILEN_VJ) && \
donatien 0:b802fc31f1db 792 len >= p[1] && \
donatien 0:b802fc31f1db 793 p[0] == opt) { \
donatien 0:b802fc31f1db 794 len -= p[1]; \
donatien 0:b802fc31f1db 795 INCPTR(2, p); \
donatien 0:b802fc31f1db 796 GETSHORT(cishort, p); \
donatien 0:b802fc31f1db 797 /* Check rejected value. */ \
donatien 0:b802fc31f1db 798 if (cishort != val) { \
donatien 0:b802fc31f1db 799 goto bad; \
donatien 0:b802fc31f1db 800 } \
donatien 0:b802fc31f1db 801 if (!old) { \
donatien 0:b802fc31f1db 802 GETCHAR(cimaxslotindex, p); \
donatien 0:b802fc31f1db 803 if (cimaxslotindex != maxslot) { \
donatien 0:b802fc31f1db 804 goto bad; \
donatien 0:b802fc31f1db 805 } \
donatien 0:b802fc31f1db 806 GETCHAR(ciflag, p); \
donatien 0:b802fc31f1db 807 if (ciflag != cflag) { \
donatien 0:b802fc31f1db 808 goto bad; \
donatien 0:b802fc31f1db 809 } \
donatien 0:b802fc31f1db 810 } \
donatien 0:b802fc31f1db 811 try.neg = 0; \
donatien 0:b802fc31f1db 812 }
donatien 0:b802fc31f1db 813
donatien 0:b802fc31f1db 814 #define REJCIDNS(opt, neg, dnsaddr) \
donatien 0:b802fc31f1db 815 if (go->neg && \
donatien 0:b802fc31f1db 816 ((cilen = p[1]) == CILEN_ADDR) && \
donatien 0:b802fc31f1db 817 len >= cilen && \
donatien 0:b802fc31f1db 818 p[0] == opt) { \
donatien 0:b802fc31f1db 819 u32_t l; \
donatien 0:b802fc31f1db 820 len -= cilen; \
donatien 0:b802fc31f1db 821 INCPTR(2, p); \
donatien 0:b802fc31f1db 822 GETLONG(l, p); \
donatien 0:b802fc31f1db 823 cilong = htonl(l); \
donatien 0:b802fc31f1db 824 /* Check rejected value. */ \
donatien 0:b802fc31f1db 825 if (cilong != dnsaddr) { \
donatien 0:b802fc31f1db 826 goto bad; \
donatien 0:b802fc31f1db 827 } \
donatien 0:b802fc31f1db 828 try.neg = 0; \
donatien 0:b802fc31f1db 829 }
donatien 0:b802fc31f1db 830
donatien 0:b802fc31f1db 831 REJCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), neg_addr,
donatien 0:b802fc31f1db 832 go->old_addrs, go->ouraddr, go->hisaddr);
donatien 0:b802fc31f1db 833
donatien 0:b802fc31f1db 834 REJCIVJ(CI_COMPRESSTYPE, neg_vj, go->vj_protocol, go->old_vj,
donatien 0:b802fc31f1db 835 go->maxslotindex, go->cflag);
donatien 0:b802fc31f1db 836
donatien 0:b802fc31f1db 837 REJCIDNS(CI_MS_DNS1, req_dns1, go->dnsaddr[0]);
donatien 0:b802fc31f1db 838
donatien 0:b802fc31f1db 839 REJCIDNS(CI_MS_DNS2, req_dns2, go->dnsaddr[1]);
donatien 0:b802fc31f1db 840
donatien 0:b802fc31f1db 841 /*
donatien 0:b802fc31f1db 842 * If there are any remaining CIs, then this packet is bad.
donatien 0:b802fc31f1db 843 */
donatien 0:b802fc31f1db 844 if (len != 0) {
donatien 0:b802fc31f1db 845 goto bad;
donatien 0:b802fc31f1db 846 }
donatien 0:b802fc31f1db 847 /*
donatien 0:b802fc31f1db 848 * Now we can update state.
donatien 0:b802fc31f1db 849 */
donatien 0:b802fc31f1db 850 if (f->state != LS_OPENED) {
donatien 0:b802fc31f1db 851 *go = try;
donatien 0:b802fc31f1db 852 }
donatien 0:b802fc31f1db 853 return 1;
donatien 0:b802fc31f1db 854
donatien 0:b802fc31f1db 855 bad:
donatien 0:b802fc31f1db 856 IPCPDEBUG(LOG_INFO, ("ipcp_rejci: received bad Reject!\n"));
donatien 0:b802fc31f1db 857 return 0;
donatien 0:b802fc31f1db 858 }
donatien 0:b802fc31f1db 859
donatien 0:b802fc31f1db 860
donatien 0:b802fc31f1db 861 /*
donatien 0:b802fc31f1db 862 * ipcp_reqci - Check the peer's requested CIs and send appropriate response.
donatien 0:b802fc31f1db 863 *
donatien 0:b802fc31f1db 864 * Returns: CONFACK, CONFNAK or CONFREJ and input packet modified
donatien 0:b802fc31f1db 865 * appropriately. If reject_if_disagree is non-zero, doesn't return
donatien 0:b802fc31f1db 866 * CONFNAK; returns CONFREJ if it can't return CONFACK.
donatien 0:b802fc31f1db 867 */
donatien 0:b802fc31f1db 868 static int
donatien 0:b802fc31f1db 869 ipcp_reqci(fsm *f, u_char *inp/* Requested CIs */,int *len/* Length of requested CIs */,int reject_if_disagree)
donatien 0:b802fc31f1db 870 {
donatien 0:b802fc31f1db 871 ipcp_options *wo = &ipcp_wantoptions[f->unit];
donatien 0:b802fc31f1db 872 ipcp_options *ho = &ipcp_hisoptions[f->unit];
donatien 0:b802fc31f1db 873 ipcp_options *ao = &ipcp_allowoptions[f->unit];
donatien 0:b802fc31f1db 874 #ifdef OLD_CI_ADDRS
donatien 0:b802fc31f1db 875 ipcp_options *go = &ipcp_gotoptions[f->unit];
donatien 0:b802fc31f1db 876 #endif
donatien 0:b802fc31f1db 877 u_char *cip, *next; /* Pointer to current and next CIs */
donatien 0:b802fc31f1db 878 u_short cilen, citype; /* Parsed len, type */
donatien 0:b802fc31f1db 879 u_short cishort; /* Parsed short value */
donatien 0:b802fc31f1db 880 u32_t tl, ciaddr1; /* Parsed address values */
donatien 0:b802fc31f1db 881 #ifdef OLD_CI_ADDRS
donatien 0:b802fc31f1db 882 u32_t ciaddr2; /* Parsed address values */
donatien 0:b802fc31f1db 883 #endif
donatien 0:b802fc31f1db 884 int rc = CONFACK; /* Final packet return code */
donatien 0:b802fc31f1db 885 int orc; /* Individual option return code */
donatien 0:b802fc31f1db 886 u_char *p; /* Pointer to next char to parse */
donatien 0:b802fc31f1db 887 u_char *ucp = inp; /* Pointer to current output char */
donatien 0:b802fc31f1db 888 int l = *len; /* Length left */
donatien 0:b802fc31f1db 889 u_char maxslotindex, cflag;
donatien 0:b802fc31f1db 890 int d;
donatien 0:b802fc31f1db 891
donatien 0:b802fc31f1db 892 cis_received[f->unit] = 1;
donatien 0:b802fc31f1db 893
donatien 0:b802fc31f1db 894 /*
donatien 0:b802fc31f1db 895 * Reset all his options.
donatien 0:b802fc31f1db 896 */
donatien 0:b802fc31f1db 897 BZERO(ho, sizeof(*ho));
donatien 0:b802fc31f1db 898
donatien 0:b802fc31f1db 899 /*
donatien 0:b802fc31f1db 900 * Process all his options.
donatien 0:b802fc31f1db 901 */
donatien 0:b802fc31f1db 902 next = inp;
donatien 0:b802fc31f1db 903 while (l) {
donatien 0:b802fc31f1db 904 orc = CONFACK; /* Assume success */
donatien 0:b802fc31f1db 905 cip = p = next; /* Remember begining of CI */
donatien 0:b802fc31f1db 906 if (l < 2 || /* Not enough data for CI header or */
donatien 0:b802fc31f1db 907 p[1] < 2 || /* CI length too small or */
donatien 0:b802fc31f1db 908 p[1] > l) { /* CI length too big? */
donatien 0:b802fc31f1db 909 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: bad CI length!\n"));
donatien 0:b802fc31f1db 910 orc = CONFREJ; /* Reject bad CI */
donatien 0:b802fc31f1db 911 cilen = (u_short)l;/* Reject till end of packet */
donatien 0:b802fc31f1db 912 l = 0; /* Don't loop again */
donatien 0:b802fc31f1db 913 goto endswitch;
donatien 0:b802fc31f1db 914 }
donatien 0:b802fc31f1db 915 GETCHAR(citype, p); /* Parse CI type */
donatien 0:b802fc31f1db 916 GETCHAR(cilen, p); /* Parse CI length */
donatien 0:b802fc31f1db 917 l -= cilen; /* Adjust remaining length */
donatien 0:b802fc31f1db 918 next += cilen; /* Step to next CI */
donatien 0:b802fc31f1db 919
donatien 0:b802fc31f1db 920 switch (citype) { /* Check CI type */
donatien 0:b802fc31f1db 921 #ifdef OLD_CI_ADDRS /* Need to save space... */
donatien 0:b802fc31f1db 922 case CI_ADDRS:
donatien 0:b802fc31f1db 923 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received ADDRS\n"));
donatien 0:b802fc31f1db 924 if (!ao->neg_addr ||
donatien 0:b802fc31f1db 925 cilen != CILEN_ADDRS) { /* Check CI length */
donatien 0:b802fc31f1db 926 orc = CONFREJ; /* Reject CI */
donatien 0:b802fc31f1db 927 break;
donatien 0:b802fc31f1db 928 }
donatien 0:b802fc31f1db 929
donatien 0:b802fc31f1db 930 /*
donatien 0:b802fc31f1db 931 * If he has no address, or if we both have his address but
donatien 0:b802fc31f1db 932 * disagree about it, then NAK it with our idea.
donatien 0:b802fc31f1db 933 * In particular, if we don't know his address, but he does,
donatien 0:b802fc31f1db 934 * then accept it.
donatien 0:b802fc31f1db 935 */
donatien 0:b802fc31f1db 936 GETLONG(tl, p); /* Parse source address (his) */
donatien 0:b802fc31f1db 937 ciaddr1 = htonl(tl);
donatien 0:b802fc31f1db 938 IPCPDEBUG(LOG_INFO, ("his addr %s\n", inet_ntoa(ciaddr1)));
donatien 0:b802fc31f1db 939 if (ciaddr1 != wo->hisaddr
donatien 0:b802fc31f1db 940 && (ciaddr1 == 0 || !wo->accept_remote)) {
donatien 0:b802fc31f1db 941 orc = CONFNAK;
donatien 0:b802fc31f1db 942 if (!reject_if_disagree) {
donatien 0:b802fc31f1db 943 DECPTR(sizeof(u32_t), p);
donatien 0:b802fc31f1db 944 tl = ntohl(wo->hisaddr);
donatien 0:b802fc31f1db 945 PUTLONG(tl, p);
donatien 0:b802fc31f1db 946 }
donatien 0:b802fc31f1db 947 } else if (ciaddr1 == 0 && wo->hisaddr == 0) {
donatien 0:b802fc31f1db 948 /*
donatien 0:b802fc31f1db 949 * If neither we nor he knows his address, reject the option.
donatien 0:b802fc31f1db 950 */
donatien 0:b802fc31f1db 951 orc = CONFREJ;
donatien 0:b802fc31f1db 952 wo->req_addr = 0; /* don't NAK with 0.0.0.0 later */
donatien 0:b802fc31f1db 953 break;
donatien 0:b802fc31f1db 954 }
donatien 0:b802fc31f1db 955
donatien 0:b802fc31f1db 956 /*
donatien 0:b802fc31f1db 957 * If he doesn't know our address, or if we both have our address
donatien 0:b802fc31f1db 958 * but disagree about it, then NAK it with our idea.
donatien 0:b802fc31f1db 959 */
donatien 0:b802fc31f1db 960 GETLONG(tl, p); /* Parse desination address (ours) */
donatien 0:b802fc31f1db 961 ciaddr2 = htonl(tl);
donatien 0:b802fc31f1db 962 IPCPDEBUG(LOG_INFO, ("our addr %s\n", inet_ntoa(ciaddr2)));
donatien 0:b802fc31f1db 963 if (ciaddr2 != wo->ouraddr) {
donatien 0:b802fc31f1db 964 if (ciaddr2 == 0 || !wo->accept_local) {
donatien 0:b802fc31f1db 965 orc = CONFNAK;
donatien 0:b802fc31f1db 966 if (!reject_if_disagree) {
donatien 0:b802fc31f1db 967 DECPTR(sizeof(u32_t), p);
donatien 0:b802fc31f1db 968 tl = ntohl(wo->ouraddr);
donatien 0:b802fc31f1db 969 PUTLONG(tl, p);
donatien 0:b802fc31f1db 970 }
donatien 0:b802fc31f1db 971 } else {
donatien 0:b802fc31f1db 972 go->ouraddr = ciaddr2; /* accept peer's idea */
donatien 0:b802fc31f1db 973 }
donatien 0:b802fc31f1db 974 }
donatien 0:b802fc31f1db 975
donatien 0:b802fc31f1db 976 ho->neg_addr = 1;
donatien 0:b802fc31f1db 977 ho->old_addrs = 1;
donatien 0:b802fc31f1db 978 ho->hisaddr = ciaddr1;
donatien 0:b802fc31f1db 979 ho->ouraddr = ciaddr2;
donatien 0:b802fc31f1db 980 break;
donatien 0:b802fc31f1db 981 #endif
donatien 0:b802fc31f1db 982
donatien 0:b802fc31f1db 983 case CI_ADDR:
donatien 0:b802fc31f1db 984 if (!ao->neg_addr) {
donatien 0:b802fc31f1db 985 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR not allowed\n"));
donatien 0:b802fc31f1db 986 orc = CONFREJ; /* Reject CI */
donatien 0:b802fc31f1db 987 break;
donatien 0:b802fc31f1db 988 } else if (cilen != CILEN_ADDR) { /* Check CI length */
donatien 0:b802fc31f1db 989 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR bad len\n"));
donatien 0:b802fc31f1db 990 orc = CONFREJ; /* Reject CI */
donatien 0:b802fc31f1db 991 break;
donatien 0:b802fc31f1db 992 }
donatien 0:b802fc31f1db 993
donatien 0:b802fc31f1db 994 /*
donatien 0:b802fc31f1db 995 * If he has no address, or if we both have his address but
donatien 0:b802fc31f1db 996 * disagree about it, then NAK it with our idea.
donatien 0:b802fc31f1db 997 * In particular, if we don't know his address, but he does,
donatien 0:b802fc31f1db 998 * then accept it.
donatien 0:b802fc31f1db 999 */
donatien 0:b802fc31f1db 1000 GETLONG(tl, p); /* Parse source address (his) */
donatien 0:b802fc31f1db 1001 ciaddr1 = htonl(tl);
donatien 0:b802fc31f1db 1002 if (ciaddr1 != wo->hisaddr
donatien 0:b802fc31f1db 1003 && (ciaddr1 == 0 || !wo->accept_remote)) {
donatien 0:b802fc31f1db 1004 orc = CONFNAK;
donatien 0:b802fc31f1db 1005 if (!reject_if_disagree) {
donatien 0:b802fc31f1db 1006 DECPTR(sizeof(u32_t), p);
donatien 0:b802fc31f1db 1007 tl = ntohl(wo->hisaddr);
donatien 0:b802fc31f1db 1008 PUTLONG(tl, p);
donatien 0:b802fc31f1db 1009 }
donatien 0:b802fc31f1db 1010 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Nak ADDR %s\n", inet_ntoa(ciaddr1)));
donatien 0:b802fc31f1db 1011 } else if (ciaddr1 == 0 && wo->hisaddr == 0) {
donatien 0:b802fc31f1db 1012 /*
donatien 0:b802fc31f1db 1013 * Don't ACK an address of 0.0.0.0 - reject it instead.
donatien 0:b802fc31f1db 1014 */
donatien 0:b802fc31f1db 1015 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR %s\n", inet_ntoa(ciaddr1)));
donatien 0:b802fc31f1db 1016 orc = CONFREJ;
donatien 0:b802fc31f1db 1017 wo->req_addr = 0; /* don't NAK with 0.0.0.0 later */
donatien 0:b802fc31f1db 1018 break;
donatien 0:b802fc31f1db 1019 }
donatien 0:b802fc31f1db 1020
donatien 0:b802fc31f1db 1021 ho->neg_addr = 1;
donatien 0:b802fc31f1db 1022 ho->hisaddr = ciaddr1;
donatien 0:b802fc31f1db 1023 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: ADDR %s\n", inet_ntoa(ciaddr1)));
donatien 0:b802fc31f1db 1024 break;
donatien 0:b802fc31f1db 1025
donatien 0:b802fc31f1db 1026 case CI_MS_DNS1:
donatien 0:b802fc31f1db 1027 case CI_MS_DNS2:
donatien 0:b802fc31f1db 1028 /* Microsoft primary or secondary DNS request */
donatien 0:b802fc31f1db 1029 d = citype == CI_MS_DNS2;
donatien 0:b802fc31f1db 1030
donatien 0:b802fc31f1db 1031 /* If we do not have a DNS address then we cannot send it */
donatien 0:b802fc31f1db 1032 if (ao->dnsaddr[d] == 0 ||
donatien 0:b802fc31f1db 1033 cilen != CILEN_ADDR) { /* Check CI length */
donatien 0:b802fc31f1db 1034 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting DNS%d Request\n", d+1));
donatien 0:b802fc31f1db 1035 orc = CONFREJ; /* Reject CI */
donatien 0:b802fc31f1db 1036 break;
donatien 0:b802fc31f1db 1037 }
donatien 0:b802fc31f1db 1038 GETLONG(tl, p);
donatien 0:b802fc31f1db 1039 if (htonl(tl) != ao->dnsaddr[d]) {
donatien 0:b802fc31f1db 1040 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking DNS%d Request %s\n",
donatien 0:b802fc31f1db 1041 d+1, inet_ntoa(tl)));
donatien 0:b802fc31f1db 1042 DECPTR(sizeof(u32_t), p);
donatien 0:b802fc31f1db 1043 tl = ntohl(ao->dnsaddr[d]);
donatien 0:b802fc31f1db 1044 PUTLONG(tl, p);
donatien 0:b802fc31f1db 1045 orc = CONFNAK;
donatien 0:b802fc31f1db 1046 }
donatien 0:b802fc31f1db 1047 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received DNS%d Request\n", d+1));
donatien 0:b802fc31f1db 1048 break;
donatien 0:b802fc31f1db 1049
donatien 0:b802fc31f1db 1050 case CI_MS_WINS1:
donatien 0:b802fc31f1db 1051 case CI_MS_WINS2:
donatien 0:b802fc31f1db 1052 /* Microsoft primary or secondary WINS request */
donatien 0:b802fc31f1db 1053 d = citype == CI_MS_WINS2;
donatien 0:b802fc31f1db 1054 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received WINS%d Request\n", d+1));
donatien 0:b802fc31f1db 1055
donatien 0:b802fc31f1db 1056 /* If we do not have a DNS address then we cannot send it */
donatien 0:b802fc31f1db 1057 if (ao->winsaddr[d] == 0 ||
donatien 0:b802fc31f1db 1058 cilen != CILEN_ADDR) { /* Check CI length */
donatien 0:b802fc31f1db 1059 orc = CONFREJ; /* Reject CI */
donatien 0:b802fc31f1db 1060 break;
donatien 0:b802fc31f1db 1061 }
donatien 0:b802fc31f1db 1062 GETLONG(tl, p);
donatien 0:b802fc31f1db 1063 if (htonl(tl) != ao->winsaddr[d]) {
donatien 0:b802fc31f1db 1064 DECPTR(sizeof(u32_t), p);
donatien 0:b802fc31f1db 1065 tl = ntohl(ao->winsaddr[d]);
donatien 0:b802fc31f1db 1066 PUTLONG(tl, p);
donatien 0:b802fc31f1db 1067 orc = CONFNAK;
donatien 0:b802fc31f1db 1068 }
donatien 0:b802fc31f1db 1069 break;
donatien 0:b802fc31f1db 1070
donatien 0:b802fc31f1db 1071 case CI_COMPRESSTYPE:
donatien 0:b802fc31f1db 1072 if (!ao->neg_vj) {
donatien 0:b802fc31f1db 1073 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE not allowed\n"));
donatien 0:b802fc31f1db 1074 orc = CONFREJ;
donatien 0:b802fc31f1db 1075 break;
donatien 0:b802fc31f1db 1076 } else if (cilen != CILEN_VJ && cilen != CILEN_COMPRESS) {
donatien 0:b802fc31f1db 1077 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE len=%d\n", cilen));
donatien 0:b802fc31f1db 1078 orc = CONFREJ;
donatien 0:b802fc31f1db 1079 break;
donatien 0:b802fc31f1db 1080 }
donatien 0:b802fc31f1db 1081 GETSHORT(cishort, p);
donatien 0:b802fc31f1db 1082
donatien 0:b802fc31f1db 1083 if (!(cishort == IPCP_VJ_COMP ||
donatien 0:b802fc31f1db 1084 (cishort == IPCP_VJ_COMP_OLD && cilen == CILEN_COMPRESS))) {
donatien 0:b802fc31f1db 1085 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE %d\n", cishort));
donatien 0:b802fc31f1db 1086 orc = CONFREJ;
donatien 0:b802fc31f1db 1087 break;
donatien 0:b802fc31f1db 1088 }
donatien 0:b802fc31f1db 1089
donatien 0:b802fc31f1db 1090 ho->neg_vj = 1;
donatien 0:b802fc31f1db 1091 ho->vj_protocol = cishort;
donatien 0:b802fc31f1db 1092 if (cilen == CILEN_VJ) {
donatien 0:b802fc31f1db 1093 GETCHAR(maxslotindex, p);
donatien 0:b802fc31f1db 1094 if (maxslotindex > ao->maxslotindex) {
donatien 0:b802fc31f1db 1095 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking VJ max slot %d\n", maxslotindex));
donatien 0:b802fc31f1db 1096 orc = CONFNAK;
donatien 0:b802fc31f1db 1097 if (!reject_if_disagree) {
donatien 0:b802fc31f1db 1098 DECPTR(1, p);
donatien 0:b802fc31f1db 1099 PUTCHAR(ao->maxslotindex, p);
donatien 0:b802fc31f1db 1100 }
donatien 0:b802fc31f1db 1101 }
donatien 0:b802fc31f1db 1102 GETCHAR(cflag, p);
donatien 0:b802fc31f1db 1103 if (cflag && !ao->cflag) {
donatien 0:b802fc31f1db 1104 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking VJ cflag %d\n", cflag));
donatien 0:b802fc31f1db 1105 orc = CONFNAK;
donatien 0:b802fc31f1db 1106 if (!reject_if_disagree) {
donatien 0:b802fc31f1db 1107 DECPTR(1, p);
donatien 0:b802fc31f1db 1108 PUTCHAR(wo->cflag, p);
donatien 0:b802fc31f1db 1109 }
donatien 0:b802fc31f1db 1110 }
donatien 0:b802fc31f1db 1111 ho->maxslotindex = maxslotindex;
donatien 0:b802fc31f1db 1112 ho->cflag = cflag;
donatien 0:b802fc31f1db 1113 } else {
donatien 0:b802fc31f1db 1114 ho->old_vj = 1;
donatien 0:b802fc31f1db 1115 ho->maxslotindex = MAX_SLOTS - 1;
donatien 0:b802fc31f1db 1116 ho->cflag = 1;
donatien 0:b802fc31f1db 1117 }
donatien 0:b802fc31f1db 1118 IPCPDEBUG(LOG_INFO, (
donatien 0:b802fc31f1db 1119 "ipcp_reqci: received COMPRESSTYPE p=%d old=%d maxslot=%d cflag=%d\n",
donatien 0:b802fc31f1db 1120 ho->vj_protocol, ho->old_vj, ho->maxslotindex, ho->cflag));
donatien 0:b802fc31f1db 1121 break;
donatien 0:b802fc31f1db 1122
donatien 0:b802fc31f1db 1123 default:
donatien 0:b802fc31f1db 1124 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting unknown CI type %d\n", citype));
donatien 0:b802fc31f1db 1125 orc = CONFREJ;
donatien 0:b802fc31f1db 1126 break;
donatien 0:b802fc31f1db 1127 }
donatien 0:b802fc31f1db 1128
donatien 0:b802fc31f1db 1129 endswitch:
donatien 0:b802fc31f1db 1130 if (orc == CONFACK && /* Good CI */
donatien 0:b802fc31f1db 1131 rc != CONFACK) { /* but prior CI wasnt? */
donatien 0:b802fc31f1db 1132 continue; /* Don't send this one */
donatien 0:b802fc31f1db 1133 }
donatien 0:b802fc31f1db 1134
donatien 0:b802fc31f1db 1135 if (orc == CONFNAK) { /* Nak this CI? */
donatien 0:b802fc31f1db 1136 if (reject_if_disagree) { /* Getting fed up with sending NAKs? */
donatien 0:b802fc31f1db 1137 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting too many naks\n"));
donatien 0:b802fc31f1db 1138 orc = CONFREJ; /* Get tough if so */
donatien 0:b802fc31f1db 1139 } else {
donatien 0:b802fc31f1db 1140 if (rc == CONFREJ) { /* Rejecting prior CI? */
donatien 0:b802fc31f1db 1141 continue; /* Don't send this one */
donatien 0:b802fc31f1db 1142 }
donatien 0:b802fc31f1db 1143 if (rc == CONFACK) { /* Ack'd all prior CIs? */
donatien 0:b802fc31f1db 1144 rc = CONFNAK; /* Not anymore... */
donatien 0:b802fc31f1db 1145 ucp = inp; /* Backup */
donatien 0:b802fc31f1db 1146 }
donatien 0:b802fc31f1db 1147 }
donatien 0:b802fc31f1db 1148 }
donatien 0:b802fc31f1db 1149
donatien 0:b802fc31f1db 1150 if (orc == CONFREJ && /* Reject this CI */
donatien 0:b802fc31f1db 1151 rc != CONFREJ) { /* but no prior ones? */
donatien 0:b802fc31f1db 1152 rc = CONFREJ;
donatien 0:b802fc31f1db 1153 ucp = inp; /* Backup */
donatien 0:b802fc31f1db 1154 }
donatien 0:b802fc31f1db 1155
donatien 0:b802fc31f1db 1156 /* Need to move CI? */
donatien 0:b802fc31f1db 1157 if (ucp != cip) {
donatien 0:b802fc31f1db 1158 BCOPY(cip, ucp, cilen); /* Move it */
donatien 0:b802fc31f1db 1159 }
donatien 0:b802fc31f1db 1160
donatien 0:b802fc31f1db 1161 /* Update output pointer */
donatien 0:b802fc31f1db 1162 INCPTR(cilen, ucp);
donatien 0:b802fc31f1db 1163 }
donatien 0:b802fc31f1db 1164
donatien 0:b802fc31f1db 1165 /*
donatien 0:b802fc31f1db 1166 * If we aren't rejecting this packet, and we want to negotiate
donatien 0:b802fc31f1db 1167 * their address, and they didn't send their address, then we
donatien 0:b802fc31f1db 1168 * send a NAK with a CI_ADDR option appended. We assume the
donatien 0:b802fc31f1db 1169 * input buffer is long enough that we can append the extra
donatien 0:b802fc31f1db 1170 * option safely.
donatien 0:b802fc31f1db 1171 */
donatien 0:b802fc31f1db 1172 if (rc != CONFREJ && !ho->neg_addr &&
donatien 0:b802fc31f1db 1173 wo->req_addr && !reject_if_disagree) {
donatien 0:b802fc31f1db 1174 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Requesting peer address\n"));
donatien 0:b802fc31f1db 1175 if (rc == CONFACK) {
donatien 0:b802fc31f1db 1176 rc = CONFNAK;
donatien 0:b802fc31f1db 1177 ucp = inp; /* reset pointer */
donatien 0:b802fc31f1db 1178 wo->req_addr = 0; /* don't ask again */
donatien 0:b802fc31f1db 1179 }
donatien 0:b802fc31f1db 1180 PUTCHAR(CI_ADDR, ucp);
donatien 0:b802fc31f1db 1181 PUTCHAR(CILEN_ADDR, ucp);
donatien 0:b802fc31f1db 1182 tl = ntohl(wo->hisaddr);
donatien 0:b802fc31f1db 1183 PUTLONG(tl, ucp);
donatien 0:b802fc31f1db 1184 }
donatien 0:b802fc31f1db 1185
donatien 0:b802fc31f1db 1186 *len = (int)(ucp - inp); /* Compute output length */
donatien 0:b802fc31f1db 1187 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: returning Configure-%s\n", CODENAME(rc)));
donatien 0:b802fc31f1db 1188 return (rc); /* Return final code */
donatien 0:b802fc31f1db 1189 }
donatien 0:b802fc31f1db 1190
donatien 0:b802fc31f1db 1191
donatien 0:b802fc31f1db 1192 #if 0
donatien 0:b802fc31f1db 1193 /*
donatien 0:b802fc31f1db 1194 * ip_check_options - check that any IP-related options are OK,
donatien 0:b802fc31f1db 1195 * and assign appropriate defaults.
donatien 0:b802fc31f1db 1196 */
donatien 0:b802fc31f1db 1197 static void
donatien 0:b802fc31f1db 1198 ip_check_options(u_long localAddr)
donatien 0:b802fc31f1db 1199 {
donatien 0:b802fc31f1db 1200 ipcp_options *wo = &ipcp_wantoptions[0];
donatien 0:b802fc31f1db 1201
donatien 0:b802fc31f1db 1202 /*
donatien 0:b802fc31f1db 1203 * Load our default IP address but allow the remote host to give us
donatien 0:b802fc31f1db 1204 * a new address.
donatien 0:b802fc31f1db 1205 */
donatien 0:b802fc31f1db 1206 if (wo->ouraddr == 0 && !ppp_settings.disable_defaultip) {
donatien 0:b802fc31f1db 1207 wo->accept_local = 1; /* don't insist on this default value */
donatien 0:b802fc31f1db 1208 wo->ouraddr = htonl(localAddr);
donatien 0:b802fc31f1db 1209 }
donatien 0:b802fc31f1db 1210 }
donatien 0:b802fc31f1db 1211 #endif
donatien 0:b802fc31f1db 1212
donatien 0:b802fc31f1db 1213
donatien 0:b802fc31f1db 1214 /*
donatien 0:b802fc31f1db 1215 * ipcp_up - IPCP has come UP.
donatien 0:b802fc31f1db 1216 *
donatien 0:b802fc31f1db 1217 * Configure the IP network interface appropriately and bring it up.
donatien 0:b802fc31f1db 1218 */
donatien 0:b802fc31f1db 1219 static void
donatien 0:b802fc31f1db 1220 ipcp_up(fsm *f)
donatien 0:b802fc31f1db 1221 {
donatien 0:b802fc31f1db 1222 u32_t mask;
donatien 0:b802fc31f1db 1223 ipcp_options *ho = &ipcp_hisoptions[f->unit];
donatien 0:b802fc31f1db 1224 ipcp_options *go = &ipcp_gotoptions[f->unit];
donatien 0:b802fc31f1db 1225 ipcp_options *wo = &ipcp_wantoptions[f->unit];
donatien 0:b802fc31f1db 1226
donatien 0:b802fc31f1db 1227 np_up(f->unit, PPP_IP);
donatien 0:b802fc31f1db 1228 IPCPDEBUG(LOG_INFO, ("ipcp: up\n"));
donatien 0:b802fc31f1db 1229
donatien 0:b802fc31f1db 1230 /*
donatien 0:b802fc31f1db 1231 * We must have a non-zero IP address for both ends of the link.
donatien 0:b802fc31f1db 1232 */
donatien 0:b802fc31f1db 1233 if (!ho->neg_addr) {
donatien 0:b802fc31f1db 1234 ho->hisaddr = wo->hisaddr;
donatien 0:b802fc31f1db 1235 }
donatien 0:b802fc31f1db 1236 #ifdef __PPP_STRICT_IMPL__ //DG : Kludge for bad 3g providers PPP impl
donatien 0:b802fc31f1db 1237 if (ho->hisaddr == 0) {
donatien 0:b802fc31f1db 1238 IPCPDEBUG(LOG_ERR, ("Could not determine remote IP address\n"));
donatien 0:b802fc31f1db 1239 ipcp_close(f->unit, "Could not determine remote IP address");
donatien 0:b802fc31f1db 1240 return;
donatien 0:b802fc31f1db 1241 }
donatien 0:b802fc31f1db 1242 #endif
donatien 0:b802fc31f1db 1243 if (go->ouraddr == 0) {
donatien 0:b802fc31f1db 1244 IPCPDEBUG(LOG_ERR, ("Could not determine local IP address\n"));
donatien 0:b802fc31f1db 1245 ipcp_close(f->unit, "Could not determine local IP address");
donatien 0:b802fc31f1db 1246 return;
donatien 0:b802fc31f1db 1247 }
donatien 0:b802fc31f1db 1248
donatien 0:b802fc31f1db 1249 if (ppp_settings.usepeerdns && (go->dnsaddr[0] || go->dnsaddr[1])) {
donatien 0:b802fc31f1db 1250 /*pppGotDNSAddrs(go->dnsaddr[0], go->dnsaddr[1]);*/
donatien 0:b802fc31f1db 1251 }
donatien 0:b802fc31f1db 1252
donatien 0:b802fc31f1db 1253 /*
donatien 0:b802fc31f1db 1254 * Check that the peer is allowed to use the IP address it wants.
donatien 0:b802fc31f1db 1255 */
donatien 0:b802fc31f1db 1256 if (!auth_ip_addr(f->unit, ho->hisaddr)) {
donatien 0:b802fc31f1db 1257 IPCPDEBUG(LOG_ERR, ("Peer is not authorized to use remote address %s\n",
donatien 0:b802fc31f1db 1258 inet_ntoa(ho->hisaddr)));
donatien 0:b802fc31f1db 1259 ipcp_close(f->unit, "Unauthorized remote IP address");
donatien 0:b802fc31f1db 1260 return;
donatien 0:b802fc31f1db 1261 }
donatien 0:b802fc31f1db 1262
donatien 0:b802fc31f1db 1263 /* set tcp compression */
donatien 0:b802fc31f1db 1264 sifvjcomp(f->unit, ho->neg_vj, ho->cflag, ho->maxslotindex);
donatien 0:b802fc31f1db 1265
donatien 0:b802fc31f1db 1266 /*
donatien 0:b802fc31f1db 1267 * Set IP addresses and (if specified) netmask.
donatien 0:b802fc31f1db 1268 */
donatien 0:b802fc31f1db 1269 mask = GetMask(go->ouraddr);
donatien 0:b802fc31f1db 1270
donatien 0:b802fc31f1db 1271 if (!sifaddr(f->unit, go->ouraddr, ho->hisaddr, mask, go->dnsaddr[0], go->dnsaddr[1])) {
donatien 0:b802fc31f1db 1272 IPCPDEBUG(LOG_WARNING, ("sifaddr failed\n"));
donatien 0:b802fc31f1db 1273 ipcp_close(f->unit, "Interface configuration failed");
donatien 0:b802fc31f1db 1274 return;
donatien 0:b802fc31f1db 1275 }
donatien 0:b802fc31f1db 1276
donatien 0:b802fc31f1db 1277 /* bring the interface up for IP */
donatien 0:b802fc31f1db 1278 if (!sifup(f->unit)) {
donatien 0:b802fc31f1db 1279 IPCPDEBUG(LOG_WARNING, ("sifup failed\n"));
donatien 0:b802fc31f1db 1280 ipcp_close(f->unit, "Interface configuration failed");
donatien 0:b802fc31f1db 1281 return;
donatien 0:b802fc31f1db 1282 }
donatien 0:b802fc31f1db 1283
donatien 0:b802fc31f1db 1284 sifnpmode(f->unit, PPP_IP, NPMODE_PASS);
donatien 0:b802fc31f1db 1285
donatien 0:b802fc31f1db 1286 /* assign a default route through the interface if required */
donatien 0:b802fc31f1db 1287 if (ipcp_wantoptions[f->unit].default_route) {
donatien 0:b802fc31f1db 1288 if (sifdefaultroute(f->unit, go->ouraddr, ho->hisaddr)) {
donatien 0:b802fc31f1db 1289 default_route_set[f->unit] = 1;
donatien 0:b802fc31f1db 1290 }
donatien 0:b802fc31f1db 1291 }
donatien 0:b802fc31f1db 1292
donatien 0:b802fc31f1db 1293 IPCPDEBUG(LOG_NOTICE, ("local IP address %s\n", inet_ntoa(go->ouraddr)));
donatien 0:b802fc31f1db 1294 IPCPDEBUG(LOG_NOTICE, ("remote IP address %s\n", inet_ntoa(ho->hisaddr)));
donatien 0:b802fc31f1db 1295 if (go->dnsaddr[0]) {
donatien 0:b802fc31f1db 1296 IPCPDEBUG(LOG_NOTICE, ("primary DNS address %s\n", inet_ntoa(go->dnsaddr[0])));
donatien 0:b802fc31f1db 1297 }
donatien 0:b802fc31f1db 1298 if (go->dnsaddr[1]) {
donatien 0:b802fc31f1db 1299 IPCPDEBUG(LOG_NOTICE, ("secondary DNS address %s\n", inet_ntoa(go->dnsaddr[1])));
donatien 0:b802fc31f1db 1300 }
donatien 0:b802fc31f1db 1301 }
donatien 0:b802fc31f1db 1302
donatien 0:b802fc31f1db 1303
donatien 0:b802fc31f1db 1304 /*
donatien 0:b802fc31f1db 1305 * ipcp_down - IPCP has gone DOWN.
donatien 0:b802fc31f1db 1306 *
donatien 0:b802fc31f1db 1307 * Take the IP network interface down, clear its addresses
donatien 0:b802fc31f1db 1308 * and delete routes through it.
donatien 0:b802fc31f1db 1309 */
donatien 0:b802fc31f1db 1310 static void
donatien 0:b802fc31f1db 1311 ipcp_down(fsm *f)
donatien 0:b802fc31f1db 1312 {
donatien 0:b802fc31f1db 1313 IPCPDEBUG(LOG_INFO, ("ipcp: down\n"));
donatien 0:b802fc31f1db 1314 np_down(f->unit, PPP_IP);
donatien 0:b802fc31f1db 1315 sifvjcomp(f->unit, 0, 0, 0);
donatien 0:b802fc31f1db 1316
donatien 0:b802fc31f1db 1317 sifdown(f->unit);
donatien 0:b802fc31f1db 1318 ipcp_clear_addrs(f->unit);
donatien 0:b802fc31f1db 1319 }
donatien 0:b802fc31f1db 1320
donatien 0:b802fc31f1db 1321
donatien 0:b802fc31f1db 1322 /*
donatien 0:b802fc31f1db 1323 * ipcp_clear_addrs() - clear the interface addresses, routes, etc.
donatien 0:b802fc31f1db 1324 */
donatien 0:b802fc31f1db 1325 static void
donatien 0:b802fc31f1db 1326 ipcp_clear_addrs(int unit)
donatien 0:b802fc31f1db 1327 {
donatien 0:b802fc31f1db 1328 u32_t ouraddr, hisaddr;
donatien 0:b802fc31f1db 1329
donatien 0:b802fc31f1db 1330 ouraddr = ipcp_gotoptions[unit].ouraddr;
donatien 0:b802fc31f1db 1331 hisaddr = ipcp_hisoptions[unit].hisaddr;
donatien 0:b802fc31f1db 1332 if (default_route_set[unit]) {
donatien 0:b802fc31f1db 1333 cifdefaultroute(unit, ouraddr, hisaddr);
donatien 0:b802fc31f1db 1334 default_route_set[unit] = 0;
donatien 0:b802fc31f1db 1335 }
donatien 0:b802fc31f1db 1336 cifaddr(unit, ouraddr, hisaddr);
donatien 0:b802fc31f1db 1337 }
donatien 0:b802fc31f1db 1338
donatien 0:b802fc31f1db 1339
donatien 0:b802fc31f1db 1340 /*
donatien 0:b802fc31f1db 1341 * ipcp_finished - possibly shut down the lower layers.
donatien 0:b802fc31f1db 1342 */
donatien 0:b802fc31f1db 1343 static void
donatien 0:b802fc31f1db 1344 ipcp_finished(fsm *f)
donatien 0:b802fc31f1db 1345 {
donatien 0:b802fc31f1db 1346 np_finished(f->unit, PPP_IP);
donatien 0:b802fc31f1db 1347 }
donatien 0:b802fc31f1db 1348
donatien 0:b802fc31f1db 1349 #if PPP_ADDITIONAL_CALLBACKS
donatien 0:b802fc31f1db 1350 static int
donatien 0:b802fc31f1db 1351 ipcp_printpkt(u_char *p, int plen, void (*printer) (void *, char *, ...), void *arg)
donatien 0:b802fc31f1db 1352 {
donatien 0:b802fc31f1db 1353 LWIP_UNUSED_ARG(p);
donatien 0:b802fc31f1db 1354 LWIP_UNUSED_ARG(plen);
donatien 0:b802fc31f1db 1355 LWIP_UNUSED_ARG(printer);
donatien 0:b802fc31f1db 1356 LWIP_UNUSED_ARG(arg);
donatien 0:b802fc31f1db 1357 return 0;
donatien 0:b802fc31f1db 1358 }
donatien 0:b802fc31f1db 1359
donatien 0:b802fc31f1db 1360 /*
donatien 0:b802fc31f1db 1361 * ip_active_pkt - see if this IP packet is worth bringing the link up for.
donatien 0:b802fc31f1db 1362 * We don't bring the link up for IP fragments or for TCP FIN packets
donatien 0:b802fc31f1db 1363 * with no data.
donatien 0:b802fc31f1db 1364 */
donatien 0:b802fc31f1db 1365 #define IP_HDRLEN 20 /* bytes */
donatien 0:b802fc31f1db 1366 #define IP_OFFMASK 0x1fff
donatien 0:b802fc31f1db 1367 #define IPPROTO_TCP 6
donatien 0:b802fc31f1db 1368 #define TCP_HDRLEN 20
donatien 0:b802fc31f1db 1369 #define TH_FIN 0x01
donatien 0:b802fc31f1db 1370
donatien 0:b802fc31f1db 1371 /*
donatien 0:b802fc31f1db 1372 * We use these macros because the IP header may be at an odd address,
donatien 0:b802fc31f1db 1373 * and some compilers might use word loads to get th_off or ip_hl.
donatien 0:b802fc31f1db 1374 */
donatien 0:b802fc31f1db 1375
donatien 0:b802fc31f1db 1376 #define net_short(x) (((x)[0] << 8) + (x)[1])
donatien 0:b802fc31f1db 1377 #define get_iphl(x) (((unsigned char *)(x))[0] & 0xF)
donatien 0:b802fc31f1db 1378 #define get_ipoff(x) net_short((unsigned char *)(x) + 6)
donatien 0:b802fc31f1db 1379 #define get_ipproto(x) (((unsigned char *)(x))[9])
donatien 0:b802fc31f1db 1380 #define get_tcpoff(x) (((unsigned char *)(x))[12] >> 4)
donatien 0:b802fc31f1db 1381 #define get_tcpflags(x) (((unsigned char *)(x))[13])
donatien 0:b802fc31f1db 1382
donatien 0:b802fc31f1db 1383 static int
donatien 0:b802fc31f1db 1384 ip_active_pkt(u_char *pkt, int len)
donatien 0:b802fc31f1db 1385 {
donatien 0:b802fc31f1db 1386 u_char *tcp;
donatien 0:b802fc31f1db 1387 int hlen;
donatien 0:b802fc31f1db 1388
donatien 0:b802fc31f1db 1389 len -= PPP_HDRLEN;
donatien 0:b802fc31f1db 1390 pkt += PPP_HDRLEN;
donatien 0:b802fc31f1db 1391 if (len < IP_HDRLEN) {
donatien 0:b802fc31f1db 1392 return 0;
donatien 0:b802fc31f1db 1393 }
donatien 0:b802fc31f1db 1394 if ((get_ipoff(pkt) & IP_OFFMASK) != 0) {
donatien 0:b802fc31f1db 1395 return 0;
donatien 0:b802fc31f1db 1396 }
donatien 0:b802fc31f1db 1397 if (get_ipproto(pkt) != IPPROTO_TCP) {
donatien 0:b802fc31f1db 1398 return 1;
donatien 0:b802fc31f1db 1399 }
donatien 0:b802fc31f1db 1400 hlen = get_iphl(pkt) * 4;
donatien 0:b802fc31f1db 1401 if (len < hlen + TCP_HDRLEN) {
donatien 0:b802fc31f1db 1402 return 0;
donatien 0:b802fc31f1db 1403 }
donatien 0:b802fc31f1db 1404 tcp = pkt + hlen;
donatien 0:b802fc31f1db 1405 if ((get_tcpflags(tcp) & TH_FIN) != 0 && len == hlen + get_tcpoff(tcp) * 4) {
donatien 0:b802fc31f1db 1406 return 0;
donatien 0:b802fc31f1db 1407 }
donatien 0:b802fc31f1db 1408 return 1;
donatien 0:b802fc31f1db 1409 }
donatien 0:b802fc31f1db 1410 #endif /* PPP_ADDITIONAL_CALLBACKS */
donatien 0:b802fc31f1db 1411
donatien 0:b802fc31f1db 1412 #endif /* PPP_SUPPORT */