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lwip/netif/ppp/ipcp.c@0:d7bd7384a37c, 2016-12-07 (annotated)

Committer:
grzemich
Date:
Wed Dec 07 23:47:50 2016 +0000
Revision:
0:d7bd7384a37c
dgd

Who changed what in which revision?

UserRevisionLine numberNew contents of line
grzemich 0:d7bd7384a37c 1 /** In contrast to pppd 2.3.1, DNS support has been added, proxy-ARP and
grzemich 0:d7bd7384a37c 2 dial-on-demand has been stripped. */
grzemich 0:d7bd7384a37c 3 /*****************************************************************************
grzemich 0:d7bd7384a37c 4 * ipcp.c - Network PPP IP Control Protocol program file.
grzemich 0:d7bd7384a37c 5 *
grzemich 0:d7bd7384a37c 6 * Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
grzemich 0:d7bd7384a37c 7 * portions Copyright (c) 1997 by Global Election Systems Inc.
grzemich 0:d7bd7384a37c 8 *
grzemich 0:d7bd7384a37c 9 * The authors hereby grant permission to use, copy, modify, distribute,
grzemich 0:d7bd7384a37c 10 * and license this software and its documentation for any purpose, provided
grzemich 0:d7bd7384a37c 11 * that existing copyright notices are retained in all copies and that this
grzemich 0:d7bd7384a37c 12 * notice and the following disclaimer are included verbatim in any
grzemich 0:d7bd7384a37c 13 * distributions. No written agreement, license, or royalty fee is required
grzemich 0:d7bd7384a37c 14 * for any of the authorized uses.
grzemich 0:d7bd7384a37c 15 *
grzemich 0:d7bd7384a37c 16 * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
grzemich 0:d7bd7384a37c 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
grzemich 0:d7bd7384a37c 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
grzemich 0:d7bd7384a37c 19 * IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
grzemich 0:d7bd7384a37c 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
grzemich 0:d7bd7384a37c 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
grzemich 0:d7bd7384a37c 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
grzemich 0:d7bd7384a37c 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
grzemich 0:d7bd7384a37c 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
grzemich 0:d7bd7384a37c 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
grzemich 0:d7bd7384a37c 26 *
grzemich 0:d7bd7384a37c 27 ******************************************************************************
grzemich 0:d7bd7384a37c 28 * REVISION HISTORY
grzemich 0:d7bd7384a37c 29 *
grzemich 0:d7bd7384a37c 30 * 03-01-01 Marc Boucher <marc@mbsi.ca>
grzemich 0:d7bd7384a37c 31 * Ported to lwIP.
grzemich 0:d7bd7384a37c 32 * 97-12-08 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
grzemich 0:d7bd7384a37c 33 * Original.
grzemich 0:d7bd7384a37c 34 *****************************************************************************/
grzemich 0:d7bd7384a37c 35 /*
grzemich 0:d7bd7384a37c 36 * ipcp.c - PPP IP Control Protocol.
grzemich 0:d7bd7384a37c 37 *
grzemich 0:d7bd7384a37c 38 * Copyright (c) 1989 Carnegie Mellon University.
grzemich 0:d7bd7384a37c 39 * All rights reserved.
grzemich 0:d7bd7384a37c 40 *
grzemich 0:d7bd7384a37c 41 * Redistribution and use in source and binary forms are permitted
grzemich 0:d7bd7384a37c 42 * provided that the above copyright notice and this paragraph are
grzemich 0:d7bd7384a37c 43 * duplicated in all such forms and that any documentation,
grzemich 0:d7bd7384a37c 44 * advertising materials, and other materials related to such
grzemich 0:d7bd7384a37c 45 * distribution and use acknowledge that the software was developed
grzemich 0:d7bd7384a37c 46 * by Carnegie Mellon University. The name of the
grzemich 0:d7bd7384a37c 47 * University may not be used to endorse or promote products derived
grzemich 0:d7bd7384a37c 48 * from this software without specific prior written permission.
grzemich 0:d7bd7384a37c 49 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
grzemich 0:d7bd7384a37c 50 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
grzemich 0:d7bd7384a37c 51 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
grzemich 0:d7bd7384a37c 52 */
grzemich 0:d7bd7384a37c 53
grzemich 0:d7bd7384a37c 54 #include "lwip/opt.h"
grzemich 0:d7bd7384a37c 55
grzemich 0:d7bd7384a37c 56 #if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
grzemich 0:d7bd7384a37c 57
grzemich 0:d7bd7384a37c 58 #include "ppp.h"
grzemich 0:d7bd7384a37c 59 #include "pppdebug.h"
grzemich 0:d7bd7384a37c 60
grzemich 0:d7bd7384a37c 61 #include "auth.h"
grzemich 0:d7bd7384a37c 62 #include "fsm.h"
grzemich 0:d7bd7384a37c 63 #include "vj.h"
grzemich 0:d7bd7384a37c 64 #include "ipcp.h"
grzemich 0:d7bd7384a37c 65
grzemich 0:d7bd7384a37c 66 #include "lwip/inet.h"
grzemich 0:d7bd7384a37c 67
grzemich 0:d7bd7384a37c 68 #include <string.h>
grzemich 0:d7bd7384a37c 69
grzemich 0:d7bd7384a37c 70 /* #define OLD_CI_ADDRS 1 */ /* Support deprecated address negotiation. */
grzemich 0:d7bd7384a37c 71
grzemich 0:d7bd7384a37c 72 /* global vars */
grzemich 0:d7bd7384a37c 73 ipcp_options ipcp_wantoptions[NUM_PPP]; /* Options that we want to request */
grzemich 0:d7bd7384a37c 74 ipcp_options ipcp_gotoptions[NUM_PPP]; /* Options that peer ack'd */
grzemich 0:d7bd7384a37c 75 ipcp_options ipcp_allowoptions[NUM_PPP]; /* Options we allow peer to request */
grzemich 0:d7bd7384a37c 76 ipcp_options ipcp_hisoptions[NUM_PPP]; /* Options that we ack'd */
grzemich 0:d7bd7384a37c 77
grzemich 0:d7bd7384a37c 78 /* local vars */
grzemich 0:d7bd7384a37c 79 static int default_route_set[NUM_PPP]; /* Have set up a default route */
grzemich 0:d7bd7384a37c 80 static int cis_received[NUM_PPP]; /* # Conf-Reqs received */
grzemich 0:d7bd7384a37c 81
grzemich 0:d7bd7384a37c 82
grzemich 0:d7bd7384a37c 83 /*
grzemich 0:d7bd7384a37c 84 * Callbacks for fsm code. (CI = Configuration Information)
grzemich 0:d7bd7384a37c 85 */
grzemich 0:d7bd7384a37c 86 static void ipcp_resetci (fsm *); /* Reset our CI */
grzemich 0:d7bd7384a37c 87 static int ipcp_cilen (fsm *); /* Return length of our CI */
grzemich 0:d7bd7384a37c 88 static void ipcp_addci (fsm *, u_char *, int *); /* Add our CI */
grzemich 0:d7bd7384a37c 89 static int ipcp_ackci (fsm *, u_char *, int); /* Peer ack'd our CI */
grzemich 0:d7bd7384a37c 90 static int ipcp_nakci (fsm *, u_char *, int); /* Peer nak'd our CI */
grzemich 0:d7bd7384a37c 91 static int ipcp_rejci (fsm *, u_char *, int); /* Peer rej'd our CI */
grzemich 0:d7bd7384a37c 92 static int ipcp_reqci (fsm *, u_char *, int *, int); /* Rcv CI */
grzemich 0:d7bd7384a37c 93 static void ipcp_up (fsm *); /* We're UP */
grzemich 0:d7bd7384a37c 94 static void ipcp_down (fsm *); /* We're DOWN */
grzemich 0:d7bd7384a37c 95 #if PPP_ADDITIONAL_CALLBACKS
grzemich 0:d7bd7384a37c 96 static void ipcp_script (fsm *, char *); /* Run an up/down script */
grzemich 0:d7bd7384a37c 97 #endif
grzemich 0:d7bd7384a37c 98 static void ipcp_finished (fsm *); /* Don't need lower layer */
grzemich 0:d7bd7384a37c 99
grzemich 0:d7bd7384a37c 100
grzemich 0:d7bd7384a37c 101 fsm ipcp_fsm[NUM_PPP]; /* IPCP fsm structure */
grzemich 0:d7bd7384a37c 102
grzemich 0:d7bd7384a37c 103
grzemich 0:d7bd7384a37c 104 static fsm_callbacks ipcp_callbacks = { /* IPCP callback routines */
grzemich 0:d7bd7384a37c 105 ipcp_resetci, /* Reset our Configuration Information */
grzemich 0:d7bd7384a37c 106 ipcp_cilen, /* Length of our Configuration Information */
grzemich 0:d7bd7384a37c 107 ipcp_addci, /* Add our Configuration Information */
grzemich 0:d7bd7384a37c 108 ipcp_ackci, /* ACK our Configuration Information */
grzemich 0:d7bd7384a37c 109 ipcp_nakci, /* NAK our Configuration Information */
grzemich 0:d7bd7384a37c 110 ipcp_rejci, /* Reject our Configuration Information */
grzemich 0:d7bd7384a37c 111 ipcp_reqci, /* Request peer's Configuration Information */
grzemich 0:d7bd7384a37c 112 ipcp_up, /* Called when fsm reaches LS_OPENED state */
grzemich 0:d7bd7384a37c 113 ipcp_down, /* Called when fsm leaves LS_OPENED state */
grzemich 0:d7bd7384a37c 114 NULL, /* Called when we want the lower layer up */
grzemich 0:d7bd7384a37c 115 ipcp_finished, /* Called when we want the lower layer down */
grzemich 0:d7bd7384a37c 116 NULL, /* Called when Protocol-Reject received */
grzemich 0:d7bd7384a37c 117 NULL, /* Retransmission is necessary */
grzemich 0:d7bd7384a37c 118 NULL, /* Called to handle protocol-specific codes */
grzemich 0:d7bd7384a37c 119 "IPCP" /* String name of protocol */
grzemich 0:d7bd7384a37c 120 };
grzemich 0:d7bd7384a37c 121
grzemich 0:d7bd7384a37c 122 /*
grzemich 0:d7bd7384a37c 123 * Protocol entry points from main code.
grzemich 0:d7bd7384a37c 124 */
grzemich 0:d7bd7384a37c 125 static void ipcp_init (int);
grzemich 0:d7bd7384a37c 126 static void ipcp_open (int);
grzemich 0:d7bd7384a37c 127 static void ipcp_close (int, char *);
grzemich 0:d7bd7384a37c 128 static void ipcp_lowerup (int);
grzemich 0:d7bd7384a37c 129 static void ipcp_lowerdown (int);
grzemich 0:d7bd7384a37c 130 static void ipcp_input (int, u_char *, int);
grzemich 0:d7bd7384a37c 131 static void ipcp_protrej (int);
grzemich 0:d7bd7384a37c 132
grzemich 0:d7bd7384a37c 133
grzemich 0:d7bd7384a37c 134 struct protent ipcp_protent = {
grzemich 0:d7bd7384a37c 135 PPP_IPCP,
grzemich 0:d7bd7384a37c 136 ipcp_init,
grzemich 0:d7bd7384a37c 137 ipcp_input,
grzemich 0:d7bd7384a37c 138 ipcp_protrej,
grzemich 0:d7bd7384a37c 139 ipcp_lowerup,
grzemich 0:d7bd7384a37c 140 ipcp_lowerdown,
grzemich 0:d7bd7384a37c 141 ipcp_open,
grzemich 0:d7bd7384a37c 142 ipcp_close,
grzemich 0:d7bd7384a37c 143 #if PPP_ADDITIONAL_CALLBACKS
grzemich 0:d7bd7384a37c 144 ipcp_printpkt,
grzemich 0:d7bd7384a37c 145 NULL,
grzemich 0:d7bd7384a37c 146 #endif /* PPP_ADDITIONAL_CALLBACKS */
grzemich 0:d7bd7384a37c 147 1,
grzemich 0:d7bd7384a37c 148 "IPCP",
grzemich 0:d7bd7384a37c 149 #if PPP_ADDITIONAL_CALLBACKS
grzemich 0:d7bd7384a37c 150 ip_check_options,
grzemich 0:d7bd7384a37c 151 NULL,
grzemich 0:d7bd7384a37c 152 ip_active_pkt
grzemich 0:d7bd7384a37c 153 #endif /* PPP_ADDITIONAL_CALLBACKS */
grzemich 0:d7bd7384a37c 154 };
grzemich 0:d7bd7384a37c 155
grzemich 0:d7bd7384a37c 156 static void ipcp_clear_addrs (int);
grzemich 0:d7bd7384a37c 157
grzemich 0:d7bd7384a37c 158 /*
grzemich 0:d7bd7384a37c 159 * Lengths of configuration options.
grzemich 0:d7bd7384a37c 160 */
grzemich 0:d7bd7384a37c 161 #define CILEN_VOID 2
grzemich 0:d7bd7384a37c 162 #define CILEN_COMPRESS 4 /* min length for compression protocol opt. */
grzemich 0:d7bd7384a37c 163 #define CILEN_VJ 6 /* length for RFC1332 Van-Jacobson opt. */
grzemich 0:d7bd7384a37c 164 #define CILEN_ADDR 6 /* new-style single address option */
grzemich 0:d7bd7384a37c 165 #define CILEN_ADDRS 10 /* old-style dual address option */
grzemich 0:d7bd7384a37c 166
grzemich 0:d7bd7384a37c 167
grzemich 0:d7bd7384a37c 168 #define CODENAME(x) ((x) == CONFACK ? "ACK" : \
grzemich 0:d7bd7384a37c 169 (x) == CONFNAK ? "NAK" : "REJ")
grzemich 0:d7bd7384a37c 170
grzemich 0:d7bd7384a37c 171
grzemich 0:d7bd7384a37c 172 /*
grzemich 0:d7bd7384a37c 173 * ipcp_init - Initialize IPCP.
grzemich 0:d7bd7384a37c 174 */
grzemich 0:d7bd7384a37c 175 static void
grzemich 0:d7bd7384a37c 176 ipcp_init(int unit)
grzemich 0:d7bd7384a37c 177 {
grzemich 0:d7bd7384a37c 178 fsm *f = &ipcp_fsm[unit];
grzemich 0:d7bd7384a37c 179 ipcp_options *wo = &ipcp_wantoptions[unit];
grzemich 0:d7bd7384a37c 180 ipcp_options *ao = &ipcp_allowoptions[unit];
grzemich 0:d7bd7384a37c 181
grzemich 0:d7bd7384a37c 182 f->unit = unit;
grzemich 0:d7bd7384a37c 183 f->protocol = PPP_IPCP;
grzemich 0:d7bd7384a37c 184 f->callbacks = &ipcp_callbacks;
grzemich 0:d7bd7384a37c 185 fsm_init(&ipcp_fsm[unit]);
grzemich 0:d7bd7384a37c 186
grzemich 0:d7bd7384a37c 187 memset(wo, 0, sizeof(*wo));
grzemich 0:d7bd7384a37c 188 memset(ao, 0, sizeof(*ao));
grzemich 0:d7bd7384a37c 189
grzemich 0:d7bd7384a37c 190 wo->neg_addr = 1;
grzemich 0:d7bd7384a37c 191 wo->ouraddr = 0;
grzemich 0:d7bd7384a37c 192 #if VJ_SUPPORT
grzemich 0:d7bd7384a37c 193 wo->neg_vj = 1;
grzemich 0:d7bd7384a37c 194 #else /* VJ_SUPPORT */
grzemich 0:d7bd7384a37c 195 wo->neg_vj = 0;
grzemich 0:d7bd7384a37c 196 #endif /* VJ_SUPPORT */
grzemich 0:d7bd7384a37c 197 wo->vj_protocol = IPCP_VJ_COMP;
grzemich 0:d7bd7384a37c 198 wo->maxslotindex = MAX_SLOTS - 1;
grzemich 0:d7bd7384a37c 199 wo->cflag = 0;
grzemich 0:d7bd7384a37c 200 wo->default_route = 1;
grzemich 0:d7bd7384a37c 201
grzemich 0:d7bd7384a37c 202 ao->neg_addr = 1;
grzemich 0:d7bd7384a37c 203 #if VJ_SUPPORT
grzemich 0:d7bd7384a37c 204 ao->neg_vj = 1;
grzemich 0:d7bd7384a37c 205 #else /* VJ_SUPPORT */
grzemich 0:d7bd7384a37c 206 ao->neg_vj = 0;
grzemich 0:d7bd7384a37c 207 #endif /* VJ_SUPPORT */
grzemich 0:d7bd7384a37c 208 ao->maxslotindex = MAX_SLOTS - 1;
grzemich 0:d7bd7384a37c 209 ao->cflag = 1;
grzemich 0:d7bd7384a37c 210 ao->default_route = 1;
grzemich 0:d7bd7384a37c 211 }
grzemich 0:d7bd7384a37c 212
grzemich 0:d7bd7384a37c 213
grzemich 0:d7bd7384a37c 214 /*
grzemich 0:d7bd7384a37c 215 * ipcp_open - IPCP is allowed to come up.
grzemich 0:d7bd7384a37c 216 */
grzemich 0:d7bd7384a37c 217 static void
grzemich 0:d7bd7384a37c 218 ipcp_open(int unit)
grzemich 0:d7bd7384a37c 219 {
grzemich 0:d7bd7384a37c 220 fsm_open(&ipcp_fsm[unit]);
grzemich 0:d7bd7384a37c 221 }
grzemich 0:d7bd7384a37c 222
grzemich 0:d7bd7384a37c 223
grzemich 0:d7bd7384a37c 224 /*
grzemich 0:d7bd7384a37c 225 * ipcp_close - Take IPCP down.
grzemich 0:d7bd7384a37c 226 */
grzemich 0:d7bd7384a37c 227 static void
grzemich 0:d7bd7384a37c 228 ipcp_close(int unit, char *reason)
grzemich 0:d7bd7384a37c 229 {
grzemich 0:d7bd7384a37c 230 fsm_close(&ipcp_fsm[unit], reason);
grzemich 0:d7bd7384a37c 231 }
grzemich 0:d7bd7384a37c 232
grzemich 0:d7bd7384a37c 233
grzemich 0:d7bd7384a37c 234 /*
grzemich 0:d7bd7384a37c 235 * ipcp_lowerup - The lower layer is up.
grzemich 0:d7bd7384a37c 236 */
grzemich 0:d7bd7384a37c 237 static void
grzemich 0:d7bd7384a37c 238 ipcp_lowerup(int unit)
grzemich 0:d7bd7384a37c 239 {
grzemich 0:d7bd7384a37c 240 fsm_lowerup(&ipcp_fsm[unit]);
grzemich 0:d7bd7384a37c 241 }
grzemich 0:d7bd7384a37c 242
grzemich 0:d7bd7384a37c 243
grzemich 0:d7bd7384a37c 244 /*
grzemich 0:d7bd7384a37c 245 * ipcp_lowerdown - The lower layer is down.
grzemich 0:d7bd7384a37c 246 */
grzemich 0:d7bd7384a37c 247 static void
grzemich 0:d7bd7384a37c 248 ipcp_lowerdown(int unit)
grzemich 0:d7bd7384a37c 249 {
grzemich 0:d7bd7384a37c 250 fsm_lowerdown(&ipcp_fsm[unit]);
grzemich 0:d7bd7384a37c 251 }
grzemich 0:d7bd7384a37c 252
grzemich 0:d7bd7384a37c 253
grzemich 0:d7bd7384a37c 254 /*
grzemich 0:d7bd7384a37c 255 * ipcp_input - Input IPCP packet.
grzemich 0:d7bd7384a37c 256 */
grzemich 0:d7bd7384a37c 257 static void
grzemich 0:d7bd7384a37c 258 ipcp_input(int unit, u_char *p, int len)
grzemich 0:d7bd7384a37c 259 {
grzemich 0:d7bd7384a37c 260 fsm_input(&ipcp_fsm[unit], p, len);
grzemich 0:d7bd7384a37c 261 }
grzemich 0:d7bd7384a37c 262
grzemich 0:d7bd7384a37c 263
grzemich 0:d7bd7384a37c 264 /*
grzemich 0:d7bd7384a37c 265 * ipcp_protrej - A Protocol-Reject was received for IPCP.
grzemich 0:d7bd7384a37c 266 *
grzemich 0:d7bd7384a37c 267 * Pretend the lower layer went down, so we shut up.
grzemich 0:d7bd7384a37c 268 */
grzemich 0:d7bd7384a37c 269 static void
grzemich 0:d7bd7384a37c 270 ipcp_protrej(int unit)
grzemich 0:d7bd7384a37c 271 {
grzemich 0:d7bd7384a37c 272 fsm_lowerdown(&ipcp_fsm[unit]);
grzemich 0:d7bd7384a37c 273 }
grzemich 0:d7bd7384a37c 274
grzemich 0:d7bd7384a37c 275
grzemich 0:d7bd7384a37c 276 /*
grzemich 0:d7bd7384a37c 277 * ipcp_resetci - Reset our CI.
grzemich 0:d7bd7384a37c 278 */
grzemich 0:d7bd7384a37c 279 static void
grzemich 0:d7bd7384a37c 280 ipcp_resetci(fsm *f)
grzemich 0:d7bd7384a37c 281 {
grzemich 0:d7bd7384a37c 282 ipcp_options *wo = &ipcp_wantoptions[f->unit];
grzemich 0:d7bd7384a37c 283
grzemich 0:d7bd7384a37c 284 wo->req_addr = wo->neg_addr && ipcp_allowoptions[f->unit].neg_addr;
grzemich 0:d7bd7384a37c 285 if (wo->ouraddr == 0) {
grzemich 0:d7bd7384a37c 286 wo->accept_local = 1;
grzemich 0:d7bd7384a37c 287 }
grzemich 0:d7bd7384a37c 288 if (wo->hisaddr == 0) {
grzemich 0:d7bd7384a37c 289 wo->accept_remote = 1;
grzemich 0:d7bd7384a37c 290 }
grzemich 0:d7bd7384a37c 291 /* Request DNS addresses from the peer */
grzemich 0:d7bd7384a37c 292 wo->req_dns1 = ppp_settings.usepeerdns;
grzemich 0:d7bd7384a37c 293 wo->req_dns2 = ppp_settings.usepeerdns;
grzemich 0:d7bd7384a37c 294 ipcp_gotoptions[f->unit] = *wo;
grzemich 0:d7bd7384a37c 295 cis_received[f->unit] = 0;
grzemich 0:d7bd7384a37c 296 }
grzemich 0:d7bd7384a37c 297
grzemich 0:d7bd7384a37c 298
grzemich 0:d7bd7384a37c 299 /*
grzemich 0:d7bd7384a37c 300 * ipcp_cilen - Return length of our CI.
grzemich 0:d7bd7384a37c 301 */
grzemich 0:d7bd7384a37c 302 static int
grzemich 0:d7bd7384a37c 303 ipcp_cilen(fsm *f)
grzemich 0:d7bd7384a37c 304 {
grzemich 0:d7bd7384a37c 305 ipcp_options *go = &ipcp_gotoptions[f->unit];
grzemich 0:d7bd7384a37c 306 ipcp_options *wo = &ipcp_wantoptions[f->unit];
grzemich 0:d7bd7384a37c 307 ipcp_options *ho = &ipcp_hisoptions[f->unit];
grzemich 0:d7bd7384a37c 308
grzemich 0:d7bd7384a37c 309 #define LENCIVJ(neg, old) (neg ? (old? CILEN_COMPRESS : CILEN_VJ) : 0)
grzemich 0:d7bd7384a37c 310 #define LENCIADDR(neg, old) (neg ? (old? CILEN_ADDRS : CILEN_ADDR) : 0)
grzemich 0:d7bd7384a37c 311 #define LENCIDNS(neg) (neg ? (CILEN_ADDR) : 0)
grzemich 0:d7bd7384a37c 312
grzemich 0:d7bd7384a37c 313 /*
grzemich 0:d7bd7384a37c 314 * First see if we want to change our options to the old
grzemich 0:d7bd7384a37c 315 * forms because we have received old forms from the peer.
grzemich 0:d7bd7384a37c 316 */
grzemich 0:d7bd7384a37c 317 if (wo->neg_addr && !go->neg_addr && !go->old_addrs) {
grzemich 0:d7bd7384a37c 318 /* use the old style of address negotiation */
grzemich 0:d7bd7384a37c 319 go->neg_addr = 1;
grzemich 0:d7bd7384a37c 320 go->old_addrs = 1;
grzemich 0:d7bd7384a37c 321 }
grzemich 0:d7bd7384a37c 322 if (wo->neg_vj && !go->neg_vj && !go->old_vj) {
grzemich 0:d7bd7384a37c 323 /* try an older style of VJ negotiation */
grzemich 0:d7bd7384a37c 324 if (cis_received[f->unit] == 0) {
grzemich 0:d7bd7384a37c 325 /* keep trying the new style until we see some CI from the peer */
grzemich 0:d7bd7384a37c 326 go->neg_vj = 1;
grzemich 0:d7bd7384a37c 327 } else {
grzemich 0:d7bd7384a37c 328 /* use the old style only if the peer did */
grzemich 0:d7bd7384a37c 329 if (ho->neg_vj && ho->old_vj) {
grzemich 0:d7bd7384a37c 330 go->neg_vj = 1;
grzemich 0:d7bd7384a37c 331 go->old_vj = 1;
grzemich 0:d7bd7384a37c 332 go->vj_protocol = ho->vj_protocol;
grzemich 0:d7bd7384a37c 333 }
grzemich 0:d7bd7384a37c 334 }
grzemich 0:d7bd7384a37c 335 }
grzemich 0:d7bd7384a37c 336
grzemich 0:d7bd7384a37c 337 return (LENCIADDR(go->neg_addr, go->old_addrs) +
grzemich 0:d7bd7384a37c 338 LENCIVJ(go->neg_vj, go->old_vj) +
grzemich 0:d7bd7384a37c 339 LENCIDNS(go->req_dns1) +
grzemich 0:d7bd7384a37c 340 LENCIDNS(go->req_dns2));
grzemich 0:d7bd7384a37c 341 }
grzemich 0:d7bd7384a37c 342
grzemich 0:d7bd7384a37c 343
grzemich 0:d7bd7384a37c 344 /*
grzemich 0:d7bd7384a37c 345 * ipcp_addci - Add our desired CIs to a packet.
grzemich 0:d7bd7384a37c 346 */
grzemich 0:d7bd7384a37c 347 static void
grzemich 0:d7bd7384a37c 348 ipcp_addci(fsm *f, u_char *ucp, int *lenp)
grzemich 0:d7bd7384a37c 349 {
grzemich 0:d7bd7384a37c 350 ipcp_options *go = &ipcp_gotoptions[f->unit];
grzemich 0:d7bd7384a37c 351 int len = *lenp;
grzemich 0:d7bd7384a37c 352
grzemich 0:d7bd7384a37c 353 #define ADDCIVJ(opt, neg, val, old, maxslotindex, cflag) \
grzemich 0:d7bd7384a37c 354 if (neg) { \
grzemich 0:d7bd7384a37c 355 int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \
grzemich 0:d7bd7384a37c 356 if (len >= vjlen) { \
grzemich 0:d7bd7384a37c 357 PUTCHAR(opt, ucp); \
grzemich 0:d7bd7384a37c 358 PUTCHAR(vjlen, ucp); \
grzemich 0:d7bd7384a37c 359 PUTSHORT(val, ucp); \
grzemich 0:d7bd7384a37c 360 if (!old) { \
grzemich 0:d7bd7384a37c 361 PUTCHAR(maxslotindex, ucp); \
grzemich 0:d7bd7384a37c 362 PUTCHAR(cflag, ucp); \
grzemich 0:d7bd7384a37c 363 } \
grzemich 0:d7bd7384a37c 364 len -= vjlen; \
grzemich 0:d7bd7384a37c 365 } else { \
grzemich 0:d7bd7384a37c 366 neg = 0; \
grzemich 0:d7bd7384a37c 367 } \
grzemich 0:d7bd7384a37c 368 }
grzemich 0:d7bd7384a37c 369
grzemich 0:d7bd7384a37c 370 #define ADDCIADDR(opt, neg, old, val1, val2) \
grzemich 0:d7bd7384a37c 371 if (neg) { \
grzemich 0:d7bd7384a37c 372 int addrlen = (old? CILEN_ADDRS: CILEN_ADDR); \
grzemich 0:d7bd7384a37c 373 if (len >= addrlen) { \
grzemich 0:d7bd7384a37c 374 u32_t l; \
grzemich 0:d7bd7384a37c 375 PUTCHAR(opt, ucp); \
grzemich 0:d7bd7384a37c 376 PUTCHAR(addrlen, ucp); \
grzemich 0:d7bd7384a37c 377 l = ntohl(val1); \
grzemich 0:d7bd7384a37c 378 PUTLONG(l, ucp); \
grzemich 0:d7bd7384a37c 379 if (old) { \
grzemich 0:d7bd7384a37c 380 l = ntohl(val2); \
grzemich 0:d7bd7384a37c 381 PUTLONG(l, ucp); \
grzemich 0:d7bd7384a37c 382 } \
grzemich 0:d7bd7384a37c 383 len -= addrlen; \
grzemich 0:d7bd7384a37c 384 } else { \
grzemich 0:d7bd7384a37c 385 neg = 0; \
grzemich 0:d7bd7384a37c 386 } \
grzemich 0:d7bd7384a37c 387 }
grzemich 0:d7bd7384a37c 388
grzemich 0:d7bd7384a37c 389 #define ADDCIDNS(opt, neg, addr) \
grzemich 0:d7bd7384a37c 390 if (neg) { \
grzemich 0:d7bd7384a37c 391 if (len >= CILEN_ADDR) { \
grzemich 0:d7bd7384a37c 392 u32_t l; \
grzemich 0:d7bd7384a37c 393 PUTCHAR(opt, ucp); \
grzemich 0:d7bd7384a37c 394 PUTCHAR(CILEN_ADDR, ucp); \
grzemich 0:d7bd7384a37c 395 l = ntohl(addr); \
grzemich 0:d7bd7384a37c 396 PUTLONG(l, ucp); \
grzemich 0:d7bd7384a37c 397 len -= CILEN_ADDR; \
grzemich 0:d7bd7384a37c 398 } else { \
grzemich 0:d7bd7384a37c 399 neg = 0; \
grzemich 0:d7bd7384a37c 400 } \
grzemich 0:d7bd7384a37c 401 }
grzemich 0:d7bd7384a37c 402
grzemich 0:d7bd7384a37c 403 ADDCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), go->neg_addr,
grzemich 0:d7bd7384a37c 404 go->old_addrs, go->ouraddr, go->hisaddr);
grzemich 0:d7bd7384a37c 405
grzemich 0:d7bd7384a37c 406 ADDCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj,
grzemich 0:d7bd7384a37c 407 go->maxslotindex, go->cflag);
grzemich 0:d7bd7384a37c 408
grzemich 0:d7bd7384a37c 409 ADDCIDNS(CI_MS_DNS1, go->req_dns1, go->dnsaddr[0]);
grzemich 0:d7bd7384a37c 410
grzemich 0:d7bd7384a37c 411 ADDCIDNS(CI_MS_DNS2, go->req_dns2, go->dnsaddr[1]);
grzemich 0:d7bd7384a37c 412
grzemich 0:d7bd7384a37c 413 *lenp -= len;
grzemich 0:d7bd7384a37c 414 }
grzemich 0:d7bd7384a37c 415
grzemich 0:d7bd7384a37c 416
grzemich 0:d7bd7384a37c 417 /*
grzemich 0:d7bd7384a37c 418 * ipcp_ackci - Ack our CIs.
grzemich 0:d7bd7384a37c 419 *
grzemich 0:d7bd7384a37c 420 * Returns:
grzemich 0:d7bd7384a37c 421 * 0 - Ack was bad.
grzemich 0:d7bd7384a37c 422 * 1 - Ack was good.
grzemich 0:d7bd7384a37c 423 */
grzemich 0:d7bd7384a37c 424 static int
grzemich 0:d7bd7384a37c 425 ipcp_ackci(fsm *f, u_char *p, int len)
grzemich 0:d7bd7384a37c 426 {
grzemich 0:d7bd7384a37c 427 ipcp_options *go = &ipcp_gotoptions[f->unit];
grzemich 0:d7bd7384a37c 428 u_short cilen, citype, cishort;
grzemich 0:d7bd7384a37c 429 u32_t cilong;
grzemich 0:d7bd7384a37c 430 u_char cimaxslotindex, cicflag;
grzemich 0:d7bd7384a37c 431
grzemich 0:d7bd7384a37c 432 /*
grzemich 0:d7bd7384a37c 433 * CIs must be in exactly the same order that we sent...
grzemich 0:d7bd7384a37c 434 * Check packet length and CI length at each step.
grzemich 0:d7bd7384a37c 435 * If we find any deviations, then this packet is bad.
grzemich 0:d7bd7384a37c 436 */
grzemich 0:d7bd7384a37c 437
grzemich 0:d7bd7384a37c 438 #define ACKCIVJ(opt, neg, val, old, maxslotindex, cflag) \
grzemich 0:d7bd7384a37c 439 if (neg) { \
grzemich 0:d7bd7384a37c 440 int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \
grzemich 0:d7bd7384a37c 441 if ((len -= vjlen) < 0) { \
grzemich 0:d7bd7384a37c 442 goto bad; \
grzemich 0:d7bd7384a37c 443 } \
grzemich 0:d7bd7384a37c 444 GETCHAR(citype, p); \
grzemich 0:d7bd7384a37c 445 GETCHAR(cilen, p); \
grzemich 0:d7bd7384a37c 446 if (cilen != vjlen || \
grzemich 0:d7bd7384a37c 447 citype != opt) { \
grzemich 0:d7bd7384a37c 448 goto bad; \
grzemich 0:d7bd7384a37c 449 } \
grzemich 0:d7bd7384a37c 450 GETSHORT(cishort, p); \
grzemich 0:d7bd7384a37c 451 if (cishort != val) { \
grzemich 0:d7bd7384a37c 452 goto bad; \
grzemich 0:d7bd7384a37c 453 } \
grzemich 0:d7bd7384a37c 454 if (!old) { \
grzemich 0:d7bd7384a37c 455 GETCHAR(cimaxslotindex, p); \
grzemich 0:d7bd7384a37c 456 if (cimaxslotindex != maxslotindex) { \
grzemich 0:d7bd7384a37c 457 goto bad; \
grzemich 0:d7bd7384a37c 458 } \
grzemich 0:d7bd7384a37c 459 GETCHAR(cicflag, p); \
grzemich 0:d7bd7384a37c 460 if (cicflag != cflag) { \
grzemich 0:d7bd7384a37c 461 goto bad; \
grzemich 0:d7bd7384a37c 462 } \
grzemich 0:d7bd7384a37c 463 } \
grzemich 0:d7bd7384a37c 464 }
grzemich 0:d7bd7384a37c 465
grzemich 0:d7bd7384a37c 466 #define ACKCIADDR(opt, neg, old, val1, val2) \
grzemich 0:d7bd7384a37c 467 if (neg) { \
grzemich 0:d7bd7384a37c 468 int addrlen = (old? CILEN_ADDRS: CILEN_ADDR); \
grzemich 0:d7bd7384a37c 469 u32_t l; \
grzemich 0:d7bd7384a37c 470 if ((len -= addrlen) < 0) { \
grzemich 0:d7bd7384a37c 471 goto bad; \
grzemich 0:d7bd7384a37c 472 } \
grzemich 0:d7bd7384a37c 473 GETCHAR(citype, p); \
grzemich 0:d7bd7384a37c 474 GETCHAR(cilen, p); \
grzemich 0:d7bd7384a37c 475 if (cilen != addrlen || \
grzemich 0:d7bd7384a37c 476 citype != opt) { \
grzemich 0:d7bd7384a37c 477 goto bad; \
grzemich 0:d7bd7384a37c 478 } \
grzemich 0:d7bd7384a37c 479 GETLONG(l, p); \
grzemich 0:d7bd7384a37c 480 cilong = htonl(l); \
grzemich 0:d7bd7384a37c 481 if (val1 != cilong) { \
grzemich 0:d7bd7384a37c 482 goto bad; \
grzemich 0:d7bd7384a37c 483 } \
grzemich 0:d7bd7384a37c 484 if (old) { \
grzemich 0:d7bd7384a37c 485 GETLONG(l, p); \
grzemich 0:d7bd7384a37c 486 cilong = htonl(l); \
grzemich 0:d7bd7384a37c 487 if (val2 != cilong) { \
grzemich 0:d7bd7384a37c 488 goto bad; \
grzemich 0:d7bd7384a37c 489 } \
grzemich 0:d7bd7384a37c 490 } \
grzemich 0:d7bd7384a37c 491 }
grzemich 0:d7bd7384a37c 492
grzemich 0:d7bd7384a37c 493 #define ACKCIDNS(opt, neg, addr) \
grzemich 0:d7bd7384a37c 494 if (neg) { \
grzemich 0:d7bd7384a37c 495 u32_t l; \
grzemich 0:d7bd7384a37c 496 if ((len -= CILEN_ADDR) < 0) { \
grzemich 0:d7bd7384a37c 497 goto bad; \
grzemich 0:d7bd7384a37c 498 } \
grzemich 0:d7bd7384a37c 499 GETCHAR(citype, p); \
grzemich 0:d7bd7384a37c 500 GETCHAR(cilen, p); \
grzemich 0:d7bd7384a37c 501 if (cilen != CILEN_ADDR || \
grzemich 0:d7bd7384a37c 502 citype != opt) { \
grzemich 0:d7bd7384a37c 503 goto bad; \
grzemich 0:d7bd7384a37c 504 } \
grzemich 0:d7bd7384a37c 505 GETLONG(l, p); \
grzemich 0:d7bd7384a37c 506 cilong = htonl(l); \
grzemich 0:d7bd7384a37c 507 if (addr != cilong) { \
grzemich 0:d7bd7384a37c 508 goto bad; \
grzemich 0:d7bd7384a37c 509 } \
grzemich 0:d7bd7384a37c 510 }
grzemich 0:d7bd7384a37c 511
grzemich 0:d7bd7384a37c 512 ACKCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), go->neg_addr,
grzemich 0:d7bd7384a37c 513 go->old_addrs, go->ouraddr, go->hisaddr);
grzemich 0:d7bd7384a37c 514
grzemich 0:d7bd7384a37c 515 ACKCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj,
grzemich 0:d7bd7384a37c 516 go->maxslotindex, go->cflag);
grzemich 0:d7bd7384a37c 517
grzemich 0:d7bd7384a37c 518 ACKCIDNS(CI_MS_DNS1, go->req_dns1, go->dnsaddr[0]);
grzemich 0:d7bd7384a37c 519
grzemich 0:d7bd7384a37c 520 ACKCIDNS(CI_MS_DNS2, go->req_dns2, go->dnsaddr[1]);
grzemich 0:d7bd7384a37c 521
grzemich 0:d7bd7384a37c 522 /*
grzemich 0:d7bd7384a37c 523 * If there are any remaining CIs, then this packet is bad.
grzemich 0:d7bd7384a37c 524 */
grzemich 0:d7bd7384a37c 525 if (len != 0) {
grzemich 0:d7bd7384a37c 526 goto bad;
grzemich 0:d7bd7384a37c 527 }
grzemich 0:d7bd7384a37c 528 return (1);
grzemich 0:d7bd7384a37c 529
grzemich 0:d7bd7384a37c 530 bad:
grzemich 0:d7bd7384a37c 531 IPCPDEBUG(LOG_INFO, ("ipcp_ackci: received bad Ack!\n"));
grzemich 0:d7bd7384a37c 532 return (0);
grzemich 0:d7bd7384a37c 533 }
grzemich 0:d7bd7384a37c 534
grzemich 0:d7bd7384a37c 535 /*
grzemich 0:d7bd7384a37c 536 * ipcp_nakci - Peer has sent a NAK for some of our CIs.
grzemich 0:d7bd7384a37c 537 * This should not modify any state if the Nak is bad
grzemich 0:d7bd7384a37c 538 * or if IPCP is in the LS_OPENED state.
grzemich 0:d7bd7384a37c 539 *
grzemich 0:d7bd7384a37c 540 * Returns:
grzemich 0:d7bd7384a37c 541 * 0 - Nak was bad.
grzemich 0:d7bd7384a37c 542 * 1 - Nak was good.
grzemich 0:d7bd7384a37c 543 */
grzemich 0:d7bd7384a37c 544 static int
grzemich 0:d7bd7384a37c 545 ipcp_nakci(fsm *f, u_char *p, int len)
grzemich 0:d7bd7384a37c 546 {
grzemich 0:d7bd7384a37c 547 ipcp_options *go = &ipcp_gotoptions[f->unit];
grzemich 0:d7bd7384a37c 548 u_char cimaxslotindex, cicflag;
grzemich 0:d7bd7384a37c 549 u_char citype, cilen, *next;
grzemich 0:d7bd7384a37c 550 u_short cishort;
grzemich 0:d7bd7384a37c 551 u32_t ciaddr1, ciaddr2, l, cidnsaddr;
grzemich 0:d7bd7384a37c 552 ipcp_options no; /* options we've seen Naks for */
grzemich 0:d7bd7384a37c 553 ipcp_options try; /* options to request next time */
grzemich 0:d7bd7384a37c 554
grzemich 0:d7bd7384a37c 555 BZERO(&no, sizeof(no));
grzemich 0:d7bd7384a37c 556 try = *go;
grzemich 0:d7bd7384a37c 557
grzemich 0:d7bd7384a37c 558 /*
grzemich 0:d7bd7384a37c 559 * Any Nak'd CIs must be in exactly the same order that we sent.
grzemich 0:d7bd7384a37c 560 * Check packet length and CI length at each step.
grzemich 0:d7bd7384a37c 561 * If we find any deviations, then this packet is bad.
grzemich 0:d7bd7384a37c 562 */
grzemich 0:d7bd7384a37c 563 #define NAKCIADDR(opt, neg, old, code) \
grzemich 0:d7bd7384a37c 564 if (go->neg && \
grzemich 0:d7bd7384a37c 565 len >= (cilen = (old? CILEN_ADDRS: CILEN_ADDR)) && \
grzemich 0:d7bd7384a37c 566 p[1] == cilen && \
grzemich 0:d7bd7384a37c 567 p[0] == opt) { \
grzemich 0:d7bd7384a37c 568 len -= cilen; \
grzemich 0:d7bd7384a37c 569 INCPTR(2, p); \
grzemich 0:d7bd7384a37c 570 GETLONG(l, p); \
grzemich 0:d7bd7384a37c 571 ciaddr1 = htonl(l); \
grzemich 0:d7bd7384a37c 572 if (old) { \
grzemich 0:d7bd7384a37c 573 GETLONG(l, p); \
grzemich 0:d7bd7384a37c 574 ciaddr2 = htonl(l); \
grzemich 0:d7bd7384a37c 575 no.old_addrs = 1; \
grzemich 0:d7bd7384a37c 576 } else { \
grzemich 0:d7bd7384a37c 577 ciaddr2 = 0; \
grzemich 0:d7bd7384a37c 578 } \
grzemich 0:d7bd7384a37c 579 no.neg = 1; \
grzemich 0:d7bd7384a37c 580 code \
grzemich 0:d7bd7384a37c 581 }
grzemich 0:d7bd7384a37c 582
grzemich 0:d7bd7384a37c 583 #define NAKCIVJ(opt, neg, code) \
grzemich 0:d7bd7384a37c 584 if (go->neg && \
grzemich 0:d7bd7384a37c 585 ((cilen = p[1]) == CILEN_COMPRESS || cilen == CILEN_VJ) && \
grzemich 0:d7bd7384a37c 586 len >= cilen && \
grzemich 0:d7bd7384a37c 587 p[0] == opt) { \
grzemich 0:d7bd7384a37c 588 len -= cilen; \
grzemich 0:d7bd7384a37c 589 INCPTR(2, p); \
grzemich 0:d7bd7384a37c 590 GETSHORT(cishort, p); \
grzemich 0:d7bd7384a37c 591 no.neg = 1; \
grzemich 0:d7bd7384a37c 592 code \
grzemich 0:d7bd7384a37c 593 }
grzemich 0:d7bd7384a37c 594
grzemich 0:d7bd7384a37c 595 #define NAKCIDNS(opt, neg, code) \
grzemich 0:d7bd7384a37c 596 if (go->neg && \
grzemich 0:d7bd7384a37c 597 ((cilen = p[1]) == CILEN_ADDR) && \
grzemich 0:d7bd7384a37c 598 len >= cilen && \
grzemich 0:d7bd7384a37c 599 p[0] == opt) { \
grzemich 0:d7bd7384a37c 600 len -= cilen; \
grzemich 0:d7bd7384a37c 601 INCPTR(2, p); \
grzemich 0:d7bd7384a37c 602 GETLONG(l, p); \
grzemich 0:d7bd7384a37c 603 cidnsaddr = htonl(l); \
grzemich 0:d7bd7384a37c 604 no.neg = 1; \
grzemich 0:d7bd7384a37c 605 code \
grzemich 0:d7bd7384a37c 606 }
grzemich 0:d7bd7384a37c 607
grzemich 0:d7bd7384a37c 608 /*
grzemich 0:d7bd7384a37c 609 * Accept the peer's idea of {our,his} address, if different
grzemich 0:d7bd7384a37c 610 * from our idea, only if the accept_{local,remote} flag is set.
grzemich 0:d7bd7384a37c 611 */
grzemich 0:d7bd7384a37c 612 NAKCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), neg_addr, go->old_addrs,
grzemich 0:d7bd7384a37c 613 if (go->accept_local && ciaddr1) { /* Do we know our address? */
grzemich 0:d7bd7384a37c 614 try.ouraddr = ciaddr1;
grzemich 0:d7bd7384a37c 615 IPCPDEBUG(LOG_INFO, ("local IP address %s\n",
grzemich 0:d7bd7384a37c 616 inet_ntoa(ciaddr1)));
grzemich 0:d7bd7384a37c 617 }
grzemich 0:d7bd7384a37c 618 if (go->accept_remote && ciaddr2) { /* Does he know his? */
grzemich 0:d7bd7384a37c 619 try.hisaddr = ciaddr2;
grzemich 0:d7bd7384a37c 620 IPCPDEBUG(LOG_INFO, ("remote IP address %s\n",
grzemich 0:d7bd7384a37c 621 inet_ntoa(ciaddr2)));
grzemich 0:d7bd7384a37c 622 }
grzemich 0:d7bd7384a37c 623 );
grzemich 0:d7bd7384a37c 624
grzemich 0:d7bd7384a37c 625 /*
grzemich 0:d7bd7384a37c 626 * Accept the peer's value of maxslotindex provided that it
grzemich 0:d7bd7384a37c 627 * is less than what we asked for. Turn off slot-ID compression
grzemich 0:d7bd7384a37c 628 * if the peer wants. Send old-style compress-type option if
grzemich 0:d7bd7384a37c 629 * the peer wants.
grzemich 0:d7bd7384a37c 630 */
grzemich 0:d7bd7384a37c 631 NAKCIVJ(CI_COMPRESSTYPE, neg_vj,
grzemich 0:d7bd7384a37c 632 if (cilen == CILEN_VJ) {
grzemich 0:d7bd7384a37c 633 GETCHAR(cimaxslotindex, p);
grzemich 0:d7bd7384a37c 634 GETCHAR(cicflag, p);
grzemich 0:d7bd7384a37c 635 if (cishort == IPCP_VJ_COMP) {
grzemich 0:d7bd7384a37c 636 try.old_vj = 0;
grzemich 0:d7bd7384a37c 637 if (cimaxslotindex < go->maxslotindex) {
grzemich 0:d7bd7384a37c 638 try.maxslotindex = cimaxslotindex;
grzemich 0:d7bd7384a37c 639 }
grzemich 0:d7bd7384a37c 640 if (!cicflag) {
grzemich 0:d7bd7384a37c 641 try.cflag = 0;
grzemich 0:d7bd7384a37c 642 }
grzemich 0:d7bd7384a37c 643 } else {
grzemich 0:d7bd7384a37c 644 try.neg_vj = 0;
grzemich 0:d7bd7384a37c 645 }
grzemich 0:d7bd7384a37c 646 } else {
grzemich 0:d7bd7384a37c 647 if (cishort == IPCP_VJ_COMP || cishort == IPCP_VJ_COMP_OLD) {
grzemich 0:d7bd7384a37c 648 try.old_vj = 1;
grzemich 0:d7bd7384a37c 649 try.vj_protocol = cishort;
grzemich 0:d7bd7384a37c 650 } else {
grzemich 0:d7bd7384a37c 651 try.neg_vj = 0;
grzemich 0:d7bd7384a37c 652 }
grzemich 0:d7bd7384a37c 653 }
grzemich 0:d7bd7384a37c 654 );
grzemich 0:d7bd7384a37c 655
grzemich 0:d7bd7384a37c 656 NAKCIDNS(CI_MS_DNS1, req_dns1,
grzemich 0:d7bd7384a37c 657 try.dnsaddr[0] = cidnsaddr;
grzemich 0:d7bd7384a37c 658 IPCPDEBUG(LOG_INFO, ("primary DNS address %s\n", inet_ntoa(cidnsaddr)));
grzemich 0:d7bd7384a37c 659 );
grzemich 0:d7bd7384a37c 660
grzemich 0:d7bd7384a37c 661 NAKCIDNS(CI_MS_DNS2, req_dns2,
grzemich 0:d7bd7384a37c 662 try.dnsaddr[1] = cidnsaddr;
grzemich 0:d7bd7384a37c 663 IPCPDEBUG(LOG_INFO, ("secondary DNS address %s\n", inet_ntoa(cidnsaddr)));
grzemich 0:d7bd7384a37c 664 );
grzemich 0:d7bd7384a37c 665
grzemich 0:d7bd7384a37c 666 /*
grzemich 0:d7bd7384a37c 667 * There may be remaining CIs, if the peer is requesting negotiation
grzemich 0:d7bd7384a37c 668 * on an option that we didn't include in our request packet.
grzemich 0:d7bd7384a37c 669 * If they want to negotiate about IP addresses, we comply.
grzemich 0:d7bd7384a37c 670 * If they want us to ask for compression, we refuse.
grzemich 0:d7bd7384a37c 671 */
grzemich 0:d7bd7384a37c 672 while (len > CILEN_VOID) {
grzemich 0:d7bd7384a37c 673 GETCHAR(citype, p);
grzemich 0:d7bd7384a37c 674 GETCHAR(cilen, p);
grzemich 0:d7bd7384a37c 675 if( (len -= cilen) < 0 ) {
grzemich 0:d7bd7384a37c 676 goto bad;
grzemich 0:d7bd7384a37c 677 }
grzemich 0:d7bd7384a37c 678 next = p + cilen - 2;
grzemich 0:d7bd7384a37c 679
grzemich 0:d7bd7384a37c 680 switch (citype) {
grzemich 0:d7bd7384a37c 681 case CI_COMPRESSTYPE:
grzemich 0:d7bd7384a37c 682 if (go->neg_vj || no.neg_vj ||
grzemich 0:d7bd7384a37c 683 (cilen != CILEN_VJ && cilen != CILEN_COMPRESS)) {
grzemich 0:d7bd7384a37c 684 goto bad;
grzemich 0:d7bd7384a37c 685 }
grzemich 0:d7bd7384a37c 686 no.neg_vj = 1;
grzemich 0:d7bd7384a37c 687 break;
grzemich 0:d7bd7384a37c 688 case CI_ADDRS:
grzemich 0:d7bd7384a37c 689 if ((go->neg_addr && go->old_addrs) || no.old_addrs
grzemich 0:d7bd7384a37c 690 || cilen != CILEN_ADDRS) {
grzemich 0:d7bd7384a37c 691 goto bad;
grzemich 0:d7bd7384a37c 692 }
grzemich 0:d7bd7384a37c 693 try.neg_addr = 1;
grzemich 0:d7bd7384a37c 694 try.old_addrs = 1;
grzemich 0:d7bd7384a37c 695 GETLONG(l, p);
grzemich 0:d7bd7384a37c 696 ciaddr1 = htonl(l);
grzemich 0:d7bd7384a37c 697 if (ciaddr1 && go->accept_local) {
grzemich 0:d7bd7384a37c 698 try.ouraddr = ciaddr1;
grzemich 0:d7bd7384a37c 699 }
grzemich 0:d7bd7384a37c 700 GETLONG(l, p);
grzemich 0:d7bd7384a37c 701 ciaddr2 = htonl(l);
grzemich 0:d7bd7384a37c 702 if (ciaddr2 && go->accept_remote) {
grzemich 0:d7bd7384a37c 703 try.hisaddr = ciaddr2;
grzemich 0:d7bd7384a37c 704 }
grzemich 0:d7bd7384a37c 705 no.old_addrs = 1;
grzemich 0:d7bd7384a37c 706 break;
grzemich 0:d7bd7384a37c 707 case CI_ADDR:
grzemich 0:d7bd7384a37c 708 if (go->neg_addr || no.neg_addr || cilen != CILEN_ADDR) {
grzemich 0:d7bd7384a37c 709 goto bad;
grzemich 0:d7bd7384a37c 710 }
grzemich 0:d7bd7384a37c 711 try.old_addrs = 0;
grzemich 0:d7bd7384a37c 712 GETLONG(l, p);
grzemich 0:d7bd7384a37c 713 ciaddr1 = htonl(l);
grzemich 0:d7bd7384a37c 714 if (ciaddr1 && go->accept_local) {
grzemich 0:d7bd7384a37c 715 try.ouraddr = ciaddr1;
grzemich 0:d7bd7384a37c 716 }
grzemich 0:d7bd7384a37c 717 if (try.ouraddr != 0) {
grzemich 0:d7bd7384a37c 718 try.neg_addr = 1;
grzemich 0:d7bd7384a37c 719 }
grzemich 0:d7bd7384a37c 720 no.neg_addr = 1;
grzemich 0:d7bd7384a37c 721 break;
grzemich 0:d7bd7384a37c 722 }
grzemich 0:d7bd7384a37c 723 p = next;
grzemich 0:d7bd7384a37c 724 }
grzemich 0:d7bd7384a37c 725
grzemich 0:d7bd7384a37c 726 /* If there is still anything left, this packet is bad. */
grzemich 0:d7bd7384a37c 727 if (len != 0) {
grzemich 0:d7bd7384a37c 728 goto bad;
grzemich 0:d7bd7384a37c 729 }
grzemich 0:d7bd7384a37c 730
grzemich 0:d7bd7384a37c 731 /*
grzemich 0:d7bd7384a37c 732 * OK, the Nak is good. Now we can update state.
grzemich 0:d7bd7384a37c 733 */
grzemich 0:d7bd7384a37c 734 if (f->state != LS_OPENED) {
grzemich 0:d7bd7384a37c 735 *go = try;
grzemich 0:d7bd7384a37c 736 }
grzemich 0:d7bd7384a37c 737
grzemich 0:d7bd7384a37c 738 return 1;
grzemich 0:d7bd7384a37c 739
grzemich 0:d7bd7384a37c 740 bad:
grzemich 0:d7bd7384a37c 741 IPCPDEBUG(LOG_INFO, ("ipcp_nakci: received bad Nak!\n"));
grzemich 0:d7bd7384a37c 742 return 0;
grzemich 0:d7bd7384a37c 743 }
grzemich 0:d7bd7384a37c 744
grzemich 0:d7bd7384a37c 745
grzemich 0:d7bd7384a37c 746 /*
grzemich 0:d7bd7384a37c 747 * ipcp_rejci - Reject some of our CIs.
grzemich 0:d7bd7384a37c 748 */
grzemich 0:d7bd7384a37c 749 static int
grzemich 0:d7bd7384a37c 750 ipcp_rejci(fsm *f, u_char *p, int len)
grzemich 0:d7bd7384a37c 751 {
grzemich 0:d7bd7384a37c 752 ipcp_options *go = &ipcp_gotoptions[f->unit];
grzemich 0:d7bd7384a37c 753 u_char cimaxslotindex, ciflag, cilen;
grzemich 0:d7bd7384a37c 754 u_short cishort;
grzemich 0:d7bd7384a37c 755 u32_t cilong;
grzemich 0:d7bd7384a37c 756 ipcp_options try; /* options to request next time */
grzemich 0:d7bd7384a37c 757
grzemich 0:d7bd7384a37c 758 try = *go;
grzemich 0:d7bd7384a37c 759 /*
grzemich 0:d7bd7384a37c 760 * Any Rejected CIs must be in exactly the same order that we sent.
grzemich 0:d7bd7384a37c 761 * Check packet length and CI length at each step.
grzemich 0:d7bd7384a37c 762 * If we find any deviations, then this packet is bad.
grzemich 0:d7bd7384a37c 763 */
grzemich 0:d7bd7384a37c 764 #define REJCIADDR(opt, neg, old, val1, val2) \
grzemich 0:d7bd7384a37c 765 if (go->neg && \
grzemich 0:d7bd7384a37c 766 len >= (cilen = old? CILEN_ADDRS: CILEN_ADDR) && \
grzemich 0:d7bd7384a37c 767 p[1] == cilen && \
grzemich 0:d7bd7384a37c 768 p[0] == opt) { \
grzemich 0:d7bd7384a37c 769 u32_t l; \
grzemich 0:d7bd7384a37c 770 len -= cilen; \
grzemich 0:d7bd7384a37c 771 INCPTR(2, p); \
grzemich 0:d7bd7384a37c 772 GETLONG(l, p); \
grzemich 0:d7bd7384a37c 773 cilong = htonl(l); \
grzemich 0:d7bd7384a37c 774 /* Check rejected value. */ \
grzemich 0:d7bd7384a37c 775 if (cilong != val1) { \
grzemich 0:d7bd7384a37c 776 goto bad; \
grzemich 0:d7bd7384a37c 777 } \
grzemich 0:d7bd7384a37c 778 if (old) { \
grzemich 0:d7bd7384a37c 779 GETLONG(l, p); \
grzemich 0:d7bd7384a37c 780 cilong = htonl(l); \
grzemich 0:d7bd7384a37c 781 /* Check rejected value. */ \
grzemich 0:d7bd7384a37c 782 if (cilong != val2) { \
grzemich 0:d7bd7384a37c 783 goto bad; \
grzemich 0:d7bd7384a37c 784 } \
grzemich 0:d7bd7384a37c 785 } \
grzemich 0:d7bd7384a37c 786 try.neg = 0; \
grzemich 0:d7bd7384a37c 787 }
grzemich 0:d7bd7384a37c 788
grzemich 0:d7bd7384a37c 789 #define REJCIVJ(opt, neg, val, old, maxslot, cflag) \
grzemich 0:d7bd7384a37c 790 if (go->neg && \
grzemich 0:d7bd7384a37c 791 p[1] == (old? CILEN_COMPRESS : CILEN_VJ) && \
grzemich 0:d7bd7384a37c 792 len >= p[1] && \
grzemich 0:d7bd7384a37c 793 p[0] == opt) { \
grzemich 0:d7bd7384a37c 794 len -= p[1]; \
grzemich 0:d7bd7384a37c 795 INCPTR(2, p); \
grzemich 0:d7bd7384a37c 796 GETSHORT(cishort, p); \
grzemich 0:d7bd7384a37c 797 /* Check rejected value. */ \
grzemich 0:d7bd7384a37c 798 if (cishort != val) { \
grzemich 0:d7bd7384a37c 799 goto bad; \
grzemich 0:d7bd7384a37c 800 } \
grzemich 0:d7bd7384a37c 801 if (!old) { \
grzemich 0:d7bd7384a37c 802 GETCHAR(cimaxslotindex, p); \
grzemich 0:d7bd7384a37c 803 if (cimaxslotindex != maxslot) { \
grzemich 0:d7bd7384a37c 804 goto bad; \
grzemich 0:d7bd7384a37c 805 } \
grzemich 0:d7bd7384a37c 806 GETCHAR(ciflag, p); \
grzemich 0:d7bd7384a37c 807 if (ciflag != cflag) { \
grzemich 0:d7bd7384a37c 808 goto bad; \
grzemich 0:d7bd7384a37c 809 } \
grzemich 0:d7bd7384a37c 810 } \
grzemich 0:d7bd7384a37c 811 try.neg = 0; \
grzemich 0:d7bd7384a37c 812 }
grzemich 0:d7bd7384a37c 813
grzemich 0:d7bd7384a37c 814 #define REJCIDNS(opt, neg, dnsaddr) \
grzemich 0:d7bd7384a37c 815 if (go->neg && \
grzemich 0:d7bd7384a37c 816 ((cilen = p[1]) == CILEN_ADDR) && \
grzemich 0:d7bd7384a37c 817 len >= cilen && \
grzemich 0:d7bd7384a37c 818 p[0] == opt) { \
grzemich 0:d7bd7384a37c 819 u32_t l; \
grzemich 0:d7bd7384a37c 820 len -= cilen; \
grzemich 0:d7bd7384a37c 821 INCPTR(2, p); \
grzemich 0:d7bd7384a37c 822 GETLONG(l, p); \
grzemich 0:d7bd7384a37c 823 cilong = htonl(l); \
grzemich 0:d7bd7384a37c 824 /* Check rejected value. */ \
grzemich 0:d7bd7384a37c 825 if (cilong != dnsaddr) { \
grzemich 0:d7bd7384a37c 826 goto bad; \
grzemich 0:d7bd7384a37c 827 } \
grzemich 0:d7bd7384a37c 828 try.neg = 0; \
grzemich 0:d7bd7384a37c 829 }
grzemich 0:d7bd7384a37c 830
grzemich 0:d7bd7384a37c 831 REJCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), neg_addr,
grzemich 0:d7bd7384a37c 832 go->old_addrs, go->ouraddr, go->hisaddr);
grzemich 0:d7bd7384a37c 833
grzemich 0:d7bd7384a37c 834 REJCIVJ(CI_COMPRESSTYPE, neg_vj, go->vj_protocol, go->old_vj,
grzemich 0:d7bd7384a37c 835 go->maxslotindex, go->cflag);
grzemich 0:d7bd7384a37c 836
grzemich 0:d7bd7384a37c 837 REJCIDNS(CI_MS_DNS1, req_dns1, go->dnsaddr[0]);
grzemich 0:d7bd7384a37c 838
grzemich 0:d7bd7384a37c 839 REJCIDNS(CI_MS_DNS2, req_dns2, go->dnsaddr[1]);
grzemich 0:d7bd7384a37c 840
grzemich 0:d7bd7384a37c 841 /*
grzemich 0:d7bd7384a37c 842 * If there are any remaining CIs, then this packet is bad.
grzemich 0:d7bd7384a37c 843 */
grzemich 0:d7bd7384a37c 844 if (len != 0) {
grzemich 0:d7bd7384a37c 845 goto bad;
grzemich 0:d7bd7384a37c 846 }
grzemich 0:d7bd7384a37c 847 /*
grzemich 0:d7bd7384a37c 848 * Now we can update state.
grzemich 0:d7bd7384a37c 849 */
grzemich 0:d7bd7384a37c 850 if (f->state != LS_OPENED) {
grzemich 0:d7bd7384a37c 851 *go = try;
grzemich 0:d7bd7384a37c 852 }
grzemich 0:d7bd7384a37c 853 return 1;
grzemich 0:d7bd7384a37c 854
grzemich 0:d7bd7384a37c 855 bad:
grzemich 0:d7bd7384a37c 856 IPCPDEBUG(LOG_INFO, ("ipcp_rejci: received bad Reject!\n"));
grzemich 0:d7bd7384a37c 857 return 0;
grzemich 0:d7bd7384a37c 858 }
grzemich 0:d7bd7384a37c 859
grzemich 0:d7bd7384a37c 860
grzemich 0:d7bd7384a37c 861 /*
grzemich 0:d7bd7384a37c 862 * ipcp_reqci - Check the peer's requested CIs and send appropriate response.
grzemich 0:d7bd7384a37c 863 *
grzemich 0:d7bd7384a37c 864 * Returns: CONFACK, CONFNAK or CONFREJ and input packet modified
grzemich 0:d7bd7384a37c 865 * appropriately. If reject_if_disagree is non-zero, doesn't return
grzemich 0:d7bd7384a37c 866 * CONFNAK; returns CONFREJ if it can't return CONFACK.
grzemich 0:d7bd7384a37c 867 */
grzemich 0:d7bd7384a37c 868 static int
grzemich 0:d7bd7384a37c 869 ipcp_reqci(fsm *f, u_char *inp/* Requested CIs */,int *len/* Length of requested CIs */,int reject_if_disagree)
grzemich 0:d7bd7384a37c 870 {
grzemich 0:d7bd7384a37c 871 ipcp_options *wo = &ipcp_wantoptions[f->unit];
grzemich 0:d7bd7384a37c 872 ipcp_options *ho = &ipcp_hisoptions[f->unit];
grzemich 0:d7bd7384a37c 873 ipcp_options *ao = &ipcp_allowoptions[f->unit];
grzemich 0:d7bd7384a37c 874 #ifdef OLD_CI_ADDRS
grzemich 0:d7bd7384a37c 875 ipcp_options *go = &ipcp_gotoptions[f->unit];
grzemich 0:d7bd7384a37c 876 #endif
grzemich 0:d7bd7384a37c 877 u_char *cip, *next; /* Pointer to current and next CIs */
grzemich 0:d7bd7384a37c 878 u_short cilen, citype; /* Parsed len, type */
grzemich 0:d7bd7384a37c 879 u_short cishort; /* Parsed short value */
grzemich 0:d7bd7384a37c 880 u32_t tl, ciaddr1; /* Parsed address values */
grzemich 0:d7bd7384a37c 881 #ifdef OLD_CI_ADDRS
grzemich 0:d7bd7384a37c 882 u32_t ciaddr2; /* Parsed address values */
grzemich 0:d7bd7384a37c 883 #endif
grzemich 0:d7bd7384a37c 884 int rc = CONFACK; /* Final packet return code */
grzemich 0:d7bd7384a37c 885 int orc; /* Individual option return code */
grzemich 0:d7bd7384a37c 886 u_char *p; /* Pointer to next char to parse */
grzemich 0:d7bd7384a37c 887 u_char *ucp = inp; /* Pointer to current output char */
grzemich 0:d7bd7384a37c 888 int l = *len; /* Length left */
grzemich 0:d7bd7384a37c 889 u_char maxslotindex, cflag;
grzemich 0:d7bd7384a37c 890 int d;
grzemich 0:d7bd7384a37c 891
grzemich 0:d7bd7384a37c 892 cis_received[f->unit] = 1;
grzemich 0:d7bd7384a37c 893
grzemich 0:d7bd7384a37c 894 /*
grzemich 0:d7bd7384a37c 895 * Reset all his options.
grzemich 0:d7bd7384a37c 896 */
grzemich 0:d7bd7384a37c 897 BZERO(ho, sizeof(*ho));
grzemich 0:d7bd7384a37c 898
grzemich 0:d7bd7384a37c 899 /*
grzemich 0:d7bd7384a37c 900 * Process all his options.
grzemich 0:d7bd7384a37c 901 */
grzemich 0:d7bd7384a37c 902 next = inp;
grzemich 0:d7bd7384a37c 903 while (l) {
grzemich 0:d7bd7384a37c 904 orc = CONFACK; /* Assume success */
grzemich 0:d7bd7384a37c 905 cip = p = next; /* Remember begining of CI */
grzemich 0:d7bd7384a37c 906 if (l < 2 || /* Not enough data for CI header or */
grzemich 0:d7bd7384a37c 907 p[1] < 2 || /* CI length too small or */
grzemich 0:d7bd7384a37c 908 p[1] > l) { /* CI length too big? */
grzemich 0:d7bd7384a37c 909 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: bad CI length!\n"));
grzemich 0:d7bd7384a37c 910 orc = CONFREJ; /* Reject bad CI */
grzemich 0:d7bd7384a37c 911 cilen = (u_short)l;/* Reject till end of packet */
grzemich 0:d7bd7384a37c 912 l = 0; /* Don't loop again */
grzemich 0:d7bd7384a37c 913 goto endswitch;
grzemich 0:d7bd7384a37c 914 }
grzemich 0:d7bd7384a37c 915 GETCHAR(citype, p); /* Parse CI type */
grzemich 0:d7bd7384a37c 916 GETCHAR(cilen, p); /* Parse CI length */
grzemich 0:d7bd7384a37c 917 l -= cilen; /* Adjust remaining length */
grzemich 0:d7bd7384a37c 918 next += cilen; /* Step to next CI */
grzemich 0:d7bd7384a37c 919
grzemich 0:d7bd7384a37c 920 switch (citype) { /* Check CI type */
grzemich 0:d7bd7384a37c 921 #ifdef OLD_CI_ADDRS /* Need to save space... */
grzemich 0:d7bd7384a37c 922 case CI_ADDRS:
grzemich 0:d7bd7384a37c 923 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received ADDRS\n"));
grzemich 0:d7bd7384a37c 924 if (!ao->neg_addr ||
grzemich 0:d7bd7384a37c 925 cilen != CILEN_ADDRS) { /* Check CI length */
grzemich 0:d7bd7384a37c 926 orc = CONFREJ; /* Reject CI */
grzemich 0:d7bd7384a37c 927 break;
grzemich 0:d7bd7384a37c 928 }
grzemich 0:d7bd7384a37c 929
grzemich 0:d7bd7384a37c 930 /*
grzemich 0:d7bd7384a37c 931 * If he has no address, or if we both have his address but
grzemich 0:d7bd7384a37c 932 * disagree about it, then NAK it with our idea.
grzemich 0:d7bd7384a37c 933 * In particular, if we don't know his address, but he does,
grzemich 0:d7bd7384a37c 934 * then accept it.
grzemich 0:d7bd7384a37c 935 */
grzemich 0:d7bd7384a37c 936 GETLONG(tl, p); /* Parse source address (his) */
grzemich 0:d7bd7384a37c 937 ciaddr1 = htonl(tl);
grzemich 0:d7bd7384a37c 938 IPCPDEBUG(LOG_INFO, ("his addr %s\n", inet_ntoa(ciaddr1)));
grzemich 0:d7bd7384a37c 939 if (ciaddr1 != wo->hisaddr
grzemich 0:d7bd7384a37c 940 && (ciaddr1 == 0 || !wo->accept_remote)) {
grzemich 0:d7bd7384a37c 941 orc = CONFNAK;
grzemich 0:d7bd7384a37c 942 if (!reject_if_disagree) {
grzemich 0:d7bd7384a37c 943 DECPTR(sizeof(u32_t), p);
grzemich 0:d7bd7384a37c 944 tl = ntohl(wo->hisaddr);
grzemich 0:d7bd7384a37c 945 PUTLONG(tl, p);
grzemich 0:d7bd7384a37c 946 }
grzemich 0:d7bd7384a37c 947 } else if (ciaddr1 == 0 && wo->hisaddr == 0) {
grzemich 0:d7bd7384a37c 948 /*
grzemich 0:d7bd7384a37c 949 * If neither we nor he knows his address, reject the option.
grzemich 0:d7bd7384a37c 950 */
grzemich 0:d7bd7384a37c 951 orc = CONFREJ;
grzemich 0:d7bd7384a37c 952 wo->req_addr = 0; /* don't NAK with 0.0.0.0 later */
grzemich 0:d7bd7384a37c 953 break;
grzemich 0:d7bd7384a37c 954 }
grzemich 0:d7bd7384a37c 955
grzemich 0:d7bd7384a37c 956 /*
grzemich 0:d7bd7384a37c 957 * If he doesn't know our address, or if we both have our address
grzemich 0:d7bd7384a37c 958 * but disagree about it, then NAK it with our idea.
grzemich 0:d7bd7384a37c 959 */
grzemich 0:d7bd7384a37c 960 GETLONG(tl, p); /* Parse desination address (ours) */
grzemich 0:d7bd7384a37c 961 ciaddr2 = htonl(tl);
grzemich 0:d7bd7384a37c 962 IPCPDEBUG(LOG_INFO, ("our addr %s\n", inet_ntoa(ciaddr2)));
grzemich 0:d7bd7384a37c 963 if (ciaddr2 != wo->ouraddr) {
grzemich 0:d7bd7384a37c 964 if (ciaddr2 == 0 || !wo->accept_local) {
grzemich 0:d7bd7384a37c 965 orc = CONFNAK;
grzemich 0:d7bd7384a37c 966 if (!reject_if_disagree) {
grzemich 0:d7bd7384a37c 967 DECPTR(sizeof(u32_t), p);
grzemich 0:d7bd7384a37c 968 tl = ntohl(wo->ouraddr);
grzemich 0:d7bd7384a37c 969 PUTLONG(tl, p);
grzemich 0:d7bd7384a37c 970 }
grzemich 0:d7bd7384a37c 971 } else {
grzemich 0:d7bd7384a37c 972 go->ouraddr = ciaddr2; /* accept peer's idea */
grzemich 0:d7bd7384a37c 973 }
grzemich 0:d7bd7384a37c 974 }
grzemich 0:d7bd7384a37c 975
grzemich 0:d7bd7384a37c 976 ho->neg_addr = 1;
grzemich 0:d7bd7384a37c 977 ho->old_addrs = 1;
grzemich 0:d7bd7384a37c 978 ho->hisaddr = ciaddr1;
grzemich 0:d7bd7384a37c 979 ho->ouraddr = ciaddr2;
grzemich 0:d7bd7384a37c 980 break;
grzemich 0:d7bd7384a37c 981 #endif
grzemich 0:d7bd7384a37c 982
grzemich 0:d7bd7384a37c 983 case CI_ADDR:
grzemich 0:d7bd7384a37c 984 if (!ao->neg_addr) {
grzemich 0:d7bd7384a37c 985 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR not allowed\n"));
grzemich 0:d7bd7384a37c 986 orc = CONFREJ; /* Reject CI */
grzemich 0:d7bd7384a37c 987 break;
grzemich 0:d7bd7384a37c 988 } else if (cilen != CILEN_ADDR) { /* Check CI length */
grzemich 0:d7bd7384a37c 989 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR bad len\n"));
grzemich 0:d7bd7384a37c 990 orc = CONFREJ; /* Reject CI */
grzemich 0:d7bd7384a37c 991 break;
grzemich 0:d7bd7384a37c 992 }
grzemich 0:d7bd7384a37c 993
grzemich 0:d7bd7384a37c 994 /*
grzemich 0:d7bd7384a37c 995 * If he has no address, or if we both have his address but
grzemich 0:d7bd7384a37c 996 * disagree about it, then NAK it with our idea.
grzemich 0:d7bd7384a37c 997 * In particular, if we don't know his address, but he does,
grzemich 0:d7bd7384a37c 998 * then accept it.
grzemich 0:d7bd7384a37c 999 */
grzemich 0:d7bd7384a37c 1000 GETLONG(tl, p); /* Parse source address (his) */
grzemich 0:d7bd7384a37c 1001 ciaddr1 = htonl(tl);
grzemich 0:d7bd7384a37c 1002 if (ciaddr1 != wo->hisaddr
grzemich 0:d7bd7384a37c 1003 && (ciaddr1 == 0 || !wo->accept_remote)) {
grzemich 0:d7bd7384a37c 1004 orc = CONFNAK;
grzemich 0:d7bd7384a37c 1005 if (!reject_if_disagree) {
grzemich 0:d7bd7384a37c 1006 DECPTR(sizeof(u32_t), p);
grzemich 0:d7bd7384a37c 1007 tl = ntohl(wo->hisaddr);
grzemich 0:d7bd7384a37c 1008 PUTLONG(tl, p);
grzemich 0:d7bd7384a37c 1009 }
grzemich 0:d7bd7384a37c 1010 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Nak ADDR %s\n", inet_ntoa(ciaddr1)));
grzemich 0:d7bd7384a37c 1011 } else if (ciaddr1 == 0 && wo->hisaddr == 0) {
grzemich 0:d7bd7384a37c 1012 /*
grzemich 0:d7bd7384a37c 1013 * Don't ACK an address of 0.0.0.0 - reject it instead.
grzemich 0:d7bd7384a37c 1014 */
grzemich 0:d7bd7384a37c 1015 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR %s\n", inet_ntoa(ciaddr1)));
grzemich 0:d7bd7384a37c 1016 orc = CONFREJ;
grzemich 0:d7bd7384a37c 1017 wo->req_addr = 0; /* don't NAK with 0.0.0.0 later */
grzemich 0:d7bd7384a37c 1018 break;
grzemich 0:d7bd7384a37c 1019 }
grzemich 0:d7bd7384a37c 1020
grzemich 0:d7bd7384a37c 1021 ho->neg_addr = 1;
grzemich 0:d7bd7384a37c 1022 ho->hisaddr = ciaddr1;
grzemich 0:d7bd7384a37c 1023 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: ADDR %s\n", inet_ntoa(ciaddr1)));
grzemich 0:d7bd7384a37c 1024 break;
grzemich 0:d7bd7384a37c 1025
grzemich 0:d7bd7384a37c 1026 case CI_MS_DNS1:
grzemich 0:d7bd7384a37c 1027 case CI_MS_DNS2:
grzemich 0:d7bd7384a37c 1028 /* Microsoft primary or secondary DNS request */
grzemich 0:d7bd7384a37c 1029 d = citype == CI_MS_DNS2;
grzemich 0:d7bd7384a37c 1030
grzemich 0:d7bd7384a37c 1031 /* If we do not have a DNS address then we cannot send it */
grzemich 0:d7bd7384a37c 1032 if (ao->dnsaddr[d] == 0 ||
grzemich 0:d7bd7384a37c 1033 cilen != CILEN_ADDR) { /* Check CI length */
grzemich 0:d7bd7384a37c 1034 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting DNS%d Request\n", d+1));
grzemich 0:d7bd7384a37c 1035 orc = CONFREJ; /* Reject CI */
grzemich 0:d7bd7384a37c 1036 break;
grzemich 0:d7bd7384a37c 1037 }
grzemich 0:d7bd7384a37c 1038 GETLONG(tl, p);
grzemich 0:d7bd7384a37c 1039 if (htonl(tl) != ao->dnsaddr[d]) {
grzemich 0:d7bd7384a37c 1040 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking DNS%d Request %s\n",
grzemich 0:d7bd7384a37c 1041 d+1, inet_ntoa(tl)));
grzemich 0:d7bd7384a37c 1042 DECPTR(sizeof(u32_t), p);
grzemich 0:d7bd7384a37c 1043 tl = ntohl(ao->dnsaddr[d]);
grzemich 0:d7bd7384a37c 1044 PUTLONG(tl, p);
grzemich 0:d7bd7384a37c 1045 orc = CONFNAK;
grzemich 0:d7bd7384a37c 1046 }
grzemich 0:d7bd7384a37c 1047 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received DNS%d Request\n", d+1));
grzemich 0:d7bd7384a37c 1048 break;
grzemich 0:d7bd7384a37c 1049
grzemich 0:d7bd7384a37c 1050 case CI_MS_WINS1:
grzemich 0:d7bd7384a37c 1051 case CI_MS_WINS2:
grzemich 0:d7bd7384a37c 1052 /* Microsoft primary or secondary WINS request */
grzemich 0:d7bd7384a37c 1053 d = citype == CI_MS_WINS2;
grzemich 0:d7bd7384a37c 1054 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received WINS%d Request\n", d+1));
grzemich 0:d7bd7384a37c 1055
grzemich 0:d7bd7384a37c 1056 /* If we do not have a DNS address then we cannot send it */
grzemich 0:d7bd7384a37c 1057 if (ao->winsaddr[d] == 0 ||
grzemich 0:d7bd7384a37c 1058 cilen != CILEN_ADDR) { /* Check CI length */
grzemich 0:d7bd7384a37c 1059 orc = CONFREJ; /* Reject CI */
grzemich 0:d7bd7384a37c 1060 break;
grzemich 0:d7bd7384a37c 1061 }
grzemich 0:d7bd7384a37c 1062 GETLONG(tl, p);
grzemich 0:d7bd7384a37c 1063 if (htonl(tl) != ao->winsaddr[d]) {
grzemich 0:d7bd7384a37c 1064 DECPTR(sizeof(u32_t), p);
grzemich 0:d7bd7384a37c 1065 tl = ntohl(ao->winsaddr[d]);
grzemich 0:d7bd7384a37c 1066 PUTLONG(tl, p);
grzemich 0:d7bd7384a37c 1067 orc = CONFNAK;
grzemich 0:d7bd7384a37c 1068 }
grzemich 0:d7bd7384a37c 1069 break;
grzemich 0:d7bd7384a37c 1070
grzemich 0:d7bd7384a37c 1071 case CI_COMPRESSTYPE:
grzemich 0:d7bd7384a37c 1072 if (!ao->neg_vj) {
grzemich 0:d7bd7384a37c 1073 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE not allowed\n"));
grzemich 0:d7bd7384a37c 1074 orc = CONFREJ;
grzemich 0:d7bd7384a37c 1075 break;
grzemich 0:d7bd7384a37c 1076 } else if (cilen != CILEN_VJ && cilen != CILEN_COMPRESS) {
grzemich 0:d7bd7384a37c 1077 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE len=%d\n", cilen));
grzemich 0:d7bd7384a37c 1078 orc = CONFREJ;
grzemich 0:d7bd7384a37c 1079 break;
grzemich 0:d7bd7384a37c 1080 }
grzemich 0:d7bd7384a37c 1081 GETSHORT(cishort, p);
grzemich 0:d7bd7384a37c 1082
grzemich 0:d7bd7384a37c 1083 if (!(cishort == IPCP_VJ_COMP ||
grzemich 0:d7bd7384a37c 1084 (cishort == IPCP_VJ_COMP_OLD && cilen == CILEN_COMPRESS))) {
grzemich 0:d7bd7384a37c 1085 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE %d\n", cishort));
grzemich 0:d7bd7384a37c 1086 orc = CONFREJ;
grzemich 0:d7bd7384a37c 1087 break;
grzemich 0:d7bd7384a37c 1088 }
grzemich 0:d7bd7384a37c 1089
grzemich 0:d7bd7384a37c 1090 ho->neg_vj = 1;
grzemich 0:d7bd7384a37c 1091 ho->vj_protocol = cishort;
grzemich 0:d7bd7384a37c 1092 if (cilen == CILEN_VJ) {
grzemich 0:d7bd7384a37c 1093 GETCHAR(maxslotindex, p);
grzemich 0:d7bd7384a37c 1094 if (maxslotindex > ao->maxslotindex) {
grzemich 0:d7bd7384a37c 1095 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking VJ max slot %d\n", maxslotindex));
grzemich 0:d7bd7384a37c 1096 orc = CONFNAK;
grzemich 0:d7bd7384a37c 1097 if (!reject_if_disagree) {
grzemich 0:d7bd7384a37c 1098 DECPTR(1, p);
grzemich 0:d7bd7384a37c 1099 PUTCHAR(ao->maxslotindex, p);
grzemich 0:d7bd7384a37c 1100 }
grzemich 0:d7bd7384a37c 1101 }
grzemich 0:d7bd7384a37c 1102 GETCHAR(cflag, p);
grzemich 0:d7bd7384a37c 1103 if (cflag && !ao->cflag) {
grzemich 0:d7bd7384a37c 1104 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking VJ cflag %d\n", cflag));
grzemich 0:d7bd7384a37c 1105 orc = CONFNAK;
grzemich 0:d7bd7384a37c 1106 if (!reject_if_disagree) {
grzemich 0:d7bd7384a37c 1107 DECPTR(1, p);
grzemich 0:d7bd7384a37c 1108 PUTCHAR(wo->cflag, p);
grzemich 0:d7bd7384a37c 1109 }
grzemich 0:d7bd7384a37c 1110 }
grzemich 0:d7bd7384a37c 1111 ho->maxslotindex = maxslotindex;
grzemich 0:d7bd7384a37c 1112 ho->cflag = cflag;
grzemich 0:d7bd7384a37c 1113 } else {
grzemich 0:d7bd7384a37c 1114 ho->old_vj = 1;
grzemich 0:d7bd7384a37c 1115 ho->maxslotindex = MAX_SLOTS - 1;
grzemich 0:d7bd7384a37c 1116 ho->cflag = 1;
grzemich 0:d7bd7384a37c 1117 }
grzemich 0:d7bd7384a37c 1118 IPCPDEBUG(LOG_INFO, (
grzemich 0:d7bd7384a37c 1119 "ipcp_reqci: received COMPRESSTYPE p=%d old=%d maxslot=%d cflag=%d\n",
grzemich 0:d7bd7384a37c 1120 ho->vj_protocol, ho->old_vj, ho->maxslotindex, ho->cflag));
grzemich 0:d7bd7384a37c 1121 break;
grzemich 0:d7bd7384a37c 1122
grzemich 0:d7bd7384a37c 1123 default:
grzemich 0:d7bd7384a37c 1124 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting unknown CI type %d\n", citype));
grzemich 0:d7bd7384a37c 1125 orc = CONFREJ;
grzemich 0:d7bd7384a37c 1126 break;
grzemich 0:d7bd7384a37c 1127 }
grzemich 0:d7bd7384a37c 1128
grzemich 0:d7bd7384a37c 1129 endswitch:
grzemich 0:d7bd7384a37c 1130 if (orc == CONFACK && /* Good CI */
grzemich 0:d7bd7384a37c 1131 rc != CONFACK) { /* but prior CI wasnt? */
grzemich 0:d7bd7384a37c 1132 continue; /* Don't send this one */
grzemich 0:d7bd7384a37c 1133 }
grzemich 0:d7bd7384a37c 1134
grzemich 0:d7bd7384a37c 1135 if (orc == CONFNAK) { /* Nak this CI? */
grzemich 0:d7bd7384a37c 1136 if (reject_if_disagree) { /* Getting fed up with sending NAKs? */
grzemich 0:d7bd7384a37c 1137 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting too many naks\n"));
grzemich 0:d7bd7384a37c 1138 orc = CONFREJ; /* Get tough if so */
grzemich 0:d7bd7384a37c 1139 } else {
grzemich 0:d7bd7384a37c 1140 if (rc == CONFREJ) { /* Rejecting prior CI? */
grzemich 0:d7bd7384a37c 1141 continue; /* Don't send this one */
grzemich 0:d7bd7384a37c 1142 }
grzemich 0:d7bd7384a37c 1143 if (rc == CONFACK) { /* Ack'd all prior CIs? */
grzemich 0:d7bd7384a37c 1144 rc = CONFNAK; /* Not anymore... */
grzemich 0:d7bd7384a37c 1145 ucp = inp; /* Backup */
grzemich 0:d7bd7384a37c 1146 }
grzemich 0:d7bd7384a37c 1147 }
grzemich 0:d7bd7384a37c 1148 }
grzemich 0:d7bd7384a37c 1149
grzemich 0:d7bd7384a37c 1150 if (orc == CONFREJ && /* Reject this CI */
grzemich 0:d7bd7384a37c 1151 rc != CONFREJ) { /* but no prior ones? */
grzemich 0:d7bd7384a37c 1152 rc = CONFREJ;
grzemich 0:d7bd7384a37c 1153 ucp = inp; /* Backup */
grzemich 0:d7bd7384a37c 1154 }
grzemich 0:d7bd7384a37c 1155
grzemich 0:d7bd7384a37c 1156 /* Need to move CI? */
grzemich 0:d7bd7384a37c 1157 if (ucp != cip) {
grzemich 0:d7bd7384a37c 1158 BCOPY(cip, ucp, cilen); /* Move it */
grzemich 0:d7bd7384a37c 1159 }
grzemich 0:d7bd7384a37c 1160
grzemich 0:d7bd7384a37c 1161 /* Update output pointer */
grzemich 0:d7bd7384a37c 1162 INCPTR(cilen, ucp);
grzemich 0:d7bd7384a37c 1163 }
grzemich 0:d7bd7384a37c 1164
grzemich 0:d7bd7384a37c 1165 /*
grzemich 0:d7bd7384a37c 1166 * If we aren't rejecting this packet, and we want to negotiate
grzemich 0:d7bd7384a37c 1167 * their address, and they didn't send their address, then we
grzemich 0:d7bd7384a37c 1168 * send a NAK with a CI_ADDR option appended. We assume the
grzemich 0:d7bd7384a37c 1169 * input buffer is long enough that we can append the extra
grzemich 0:d7bd7384a37c 1170 * option safely.
grzemich 0:d7bd7384a37c 1171 */
grzemich 0:d7bd7384a37c 1172 if (rc != CONFREJ && !ho->neg_addr &&
grzemich 0:d7bd7384a37c 1173 wo->req_addr && !reject_if_disagree) {
grzemich 0:d7bd7384a37c 1174 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Requesting peer address\n"));
grzemich 0:d7bd7384a37c 1175 if (rc == CONFACK) {
grzemich 0:d7bd7384a37c 1176 rc = CONFNAK;
grzemich 0:d7bd7384a37c 1177 ucp = inp; /* reset pointer */
grzemich 0:d7bd7384a37c 1178 wo->req_addr = 0; /* don't ask again */
grzemich 0:d7bd7384a37c 1179 }
grzemich 0:d7bd7384a37c 1180 PUTCHAR(CI_ADDR, ucp);
grzemich 0:d7bd7384a37c 1181 PUTCHAR(CILEN_ADDR, ucp);
grzemich 0:d7bd7384a37c 1182 tl = ntohl(wo->hisaddr);
grzemich 0:d7bd7384a37c 1183 PUTLONG(tl, ucp);
grzemich 0:d7bd7384a37c 1184 }
grzemich 0:d7bd7384a37c 1185
grzemich 0:d7bd7384a37c 1186 *len = (int)(ucp - inp); /* Compute output length */
grzemich 0:d7bd7384a37c 1187 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: returning Configure-%s\n", CODENAME(rc)));
grzemich 0:d7bd7384a37c 1188 return (rc); /* Return final code */
grzemich 0:d7bd7384a37c 1189 }
grzemich 0:d7bd7384a37c 1190
grzemich 0:d7bd7384a37c 1191
grzemich 0:d7bd7384a37c 1192 #if 0
grzemich 0:d7bd7384a37c 1193 /*
grzemich 0:d7bd7384a37c 1194 * ip_check_options - check that any IP-related options are OK,
grzemich 0:d7bd7384a37c 1195 * and assign appropriate defaults.
grzemich 0:d7bd7384a37c 1196 */
grzemich 0:d7bd7384a37c 1197 static void
grzemich 0:d7bd7384a37c 1198 ip_check_options(u_long localAddr)
grzemich 0:d7bd7384a37c 1199 {
grzemich 0:d7bd7384a37c 1200 ipcp_options *wo = &ipcp_wantoptions[0];
grzemich 0:d7bd7384a37c 1201
grzemich 0:d7bd7384a37c 1202 /*
grzemich 0:d7bd7384a37c 1203 * Load our default IP address but allow the remote host to give us
grzemich 0:d7bd7384a37c 1204 * a new address.
grzemich 0:d7bd7384a37c 1205 */
grzemich 0:d7bd7384a37c 1206 if (wo->ouraddr == 0 && !ppp_settings.disable_defaultip) {
grzemich 0:d7bd7384a37c 1207 wo->accept_local = 1; /* don't insist on this default value */
grzemich 0:d7bd7384a37c 1208 wo->ouraddr = htonl(localAddr);
grzemich 0:d7bd7384a37c 1209 }
grzemich 0:d7bd7384a37c 1210 }
grzemich 0:d7bd7384a37c 1211 #endif
grzemich 0:d7bd7384a37c 1212
grzemich 0:d7bd7384a37c 1213
grzemich 0:d7bd7384a37c 1214 /*
grzemich 0:d7bd7384a37c 1215 * ipcp_up - IPCP has come UP.
grzemich 0:d7bd7384a37c 1216 *
grzemich 0:d7bd7384a37c 1217 * Configure the IP network interface appropriately and bring it up.
grzemich 0:d7bd7384a37c 1218 */
grzemich 0:d7bd7384a37c 1219 static void
grzemich 0:d7bd7384a37c 1220 ipcp_up(fsm *f)
grzemich 0:d7bd7384a37c 1221 {
grzemich 0:d7bd7384a37c 1222 u32_t mask;
grzemich 0:d7bd7384a37c 1223 ipcp_options *ho = &ipcp_hisoptions[f->unit];
grzemich 0:d7bd7384a37c 1224 ipcp_options *go = &ipcp_gotoptions[f->unit];
grzemich 0:d7bd7384a37c 1225 ipcp_options *wo = &ipcp_wantoptions[f->unit];
grzemich 0:d7bd7384a37c 1226
grzemich 0:d7bd7384a37c 1227 np_up(f->unit, PPP_IP);
grzemich 0:d7bd7384a37c 1228 IPCPDEBUG(LOG_INFO, ("ipcp: up\n"));
grzemich 0:d7bd7384a37c 1229
grzemich 0:d7bd7384a37c 1230 /*
grzemich 0:d7bd7384a37c 1231 * We must have a non-zero IP address for both ends of the link.
grzemich 0:d7bd7384a37c 1232 */
grzemich 0:d7bd7384a37c 1233 if (!ho->neg_addr) {
grzemich 0:d7bd7384a37c 1234 ho->hisaddr = wo->hisaddr;
grzemich 0:d7bd7384a37c 1235 }
grzemich 0:d7bd7384a37c 1236
grzemich 0:d7bd7384a37c 1237 if (ho->hisaddr == 0) {
grzemich 0:d7bd7384a37c 1238 #if 0
grzemich 0:d7bd7384a37c 1239 IPCPDEBUG(LOG_ERR, ("Could not determine remote IP address\n"));
grzemich 0:d7bd7384a37c 1240 ipcp_close(f->unit, "Could not determine remote IP address");
grzemich 0:d7bd7384a37c 1241 return;
grzemich 0:d7bd7384a37c 1242 #else //Kludge
grzemich 0:d7bd7384a37c 1243 ho->hisaddr = 0; //Set remote IP to 0.0.0.0, this is needed as most 3g providers do not advertise the remote IP to the user
grzemich 0:d7bd7384a37c 1244 #endif
grzemich 0:d7bd7384a37c 1245 }
grzemich 0:d7bd7384a37c 1246 if (go->ouraddr == 0) {
grzemich 0:d7bd7384a37c 1247 IPCPDEBUG(LOG_ERR, ("Could not determine local IP address\n"));
grzemich 0:d7bd7384a37c 1248 ipcp_close(f->unit, "Could not determine local IP address");
grzemich 0:d7bd7384a37c 1249 return;
grzemich 0:d7bd7384a37c 1250 }
grzemich 0:d7bd7384a37c 1251
grzemich 0:d7bd7384a37c 1252 if (ppp_settings.usepeerdns && (go->dnsaddr[0] || go->dnsaddr[1])) {
grzemich 0:d7bd7384a37c 1253 /*pppGotDNSAddrs(go->dnsaddr[0], go->dnsaddr[1]);*/
grzemich 0:d7bd7384a37c 1254 }
grzemich 0:d7bd7384a37c 1255
grzemich 0:d7bd7384a37c 1256 /*
grzemich 0:d7bd7384a37c 1257 * Check that the peer is allowed to use the IP address it wants.
grzemich 0:d7bd7384a37c 1258 */
grzemich 0:d7bd7384a37c 1259 if (!auth_ip_addr(f->unit, ho->hisaddr)) {
grzemich 0:d7bd7384a37c 1260 IPCPDEBUG(LOG_ERR, ("Peer is not authorized to use remote address %s\n",
grzemich 0:d7bd7384a37c 1261 inet_ntoa(ho->hisaddr)));
grzemich 0:d7bd7384a37c 1262 ipcp_close(f->unit, "Unauthorized remote IP address");
grzemich 0:d7bd7384a37c 1263 return;
grzemich 0:d7bd7384a37c 1264 }
grzemich 0:d7bd7384a37c 1265
grzemich 0:d7bd7384a37c 1266 /* set tcp compression */
grzemich 0:d7bd7384a37c 1267 sifvjcomp(f->unit, ho->neg_vj, ho->cflag, ho->maxslotindex);
grzemich 0:d7bd7384a37c 1268
grzemich 0:d7bd7384a37c 1269 /*
grzemich 0:d7bd7384a37c 1270 * Set IP addresses and (if specified) netmask.
grzemich 0:d7bd7384a37c 1271 */
grzemich 0:d7bd7384a37c 1272 mask = GetMask(go->ouraddr);
grzemich 0:d7bd7384a37c 1273
grzemich 0:d7bd7384a37c 1274 if (!sifaddr(f->unit, go->ouraddr, ho->hisaddr, mask, go->dnsaddr[0], go->dnsaddr[1])) {
grzemich 0:d7bd7384a37c 1275 IPCPDEBUG(LOG_WARNING, ("sifaddr failed\n"));
grzemich 0:d7bd7384a37c 1276 ipcp_close(f->unit, "Interface configuration failed");
grzemich 0:d7bd7384a37c 1277 return;
grzemich 0:d7bd7384a37c 1278 }
grzemich 0:d7bd7384a37c 1279
grzemich 0:d7bd7384a37c 1280 /* bring the interface up for IP */
grzemich 0:d7bd7384a37c 1281 if (!sifup(f->unit)) {
grzemich 0:d7bd7384a37c 1282 IPCPDEBUG(LOG_WARNING, ("sifup failed\n"));
grzemich 0:d7bd7384a37c 1283 ipcp_close(f->unit, "Interface configuration failed");
grzemich 0:d7bd7384a37c 1284 return;
grzemich 0:d7bd7384a37c 1285 }
grzemich 0:d7bd7384a37c 1286
grzemich 0:d7bd7384a37c 1287 sifnpmode(f->unit, PPP_IP, NPMODE_PASS);
grzemich 0:d7bd7384a37c 1288
grzemich 0:d7bd7384a37c 1289 /* assign a default route through the interface if required */
grzemich 0:d7bd7384a37c 1290 if (ipcp_wantoptions[f->unit].default_route) {
grzemich 0:d7bd7384a37c 1291 if (sifdefaultroute(f->unit, go->ouraddr, ho->hisaddr)) {
grzemich 0:d7bd7384a37c 1292 default_route_set[f->unit] = 1;
grzemich 0:d7bd7384a37c 1293 }
grzemich 0:d7bd7384a37c 1294 }
grzemich 0:d7bd7384a37c 1295
grzemich 0:d7bd7384a37c 1296 IPCPDEBUG(LOG_NOTICE, ("local IP address %s\n", inet_ntoa(go->ouraddr)));
grzemich 0:d7bd7384a37c 1297 IPCPDEBUG(LOG_NOTICE, ("remote IP address %s\n", inet_ntoa(ho->hisaddr)));
grzemich 0:d7bd7384a37c 1298 if (go->dnsaddr[0]) {
grzemich 0:d7bd7384a37c 1299 IPCPDEBUG(LOG_NOTICE, ("primary DNS address %s\n", inet_ntoa(go->dnsaddr[0])));
grzemich 0:d7bd7384a37c 1300 }
grzemich 0:d7bd7384a37c 1301 if (go->dnsaddr[1]) {
grzemich 0:d7bd7384a37c 1302 IPCPDEBUG(LOG_NOTICE, ("secondary DNS address %s\n", inet_ntoa(go->dnsaddr[1])));
grzemich 0:d7bd7384a37c 1303 }
grzemich 0:d7bd7384a37c 1304 }
grzemich 0:d7bd7384a37c 1305
grzemich 0:d7bd7384a37c 1306
grzemich 0:d7bd7384a37c 1307 /*
grzemich 0:d7bd7384a37c 1308 * ipcp_down - IPCP has gone DOWN.
grzemich 0:d7bd7384a37c 1309 *
grzemich 0:d7bd7384a37c 1310 * Take the IP network interface down, clear its addresses
grzemich 0:d7bd7384a37c 1311 * and delete routes through it.
grzemich 0:d7bd7384a37c 1312 */
grzemich 0:d7bd7384a37c 1313 static void
grzemich 0:d7bd7384a37c 1314 ipcp_down(fsm *f)
grzemich 0:d7bd7384a37c 1315 {
grzemich 0:d7bd7384a37c 1316 IPCPDEBUG(LOG_INFO, ("ipcp: down\n"));
grzemich 0:d7bd7384a37c 1317 np_down(f->unit, PPP_IP);
grzemich 0:d7bd7384a37c 1318 sifvjcomp(f->unit, 0, 0, 0);
grzemich 0:d7bd7384a37c 1319
grzemich 0:d7bd7384a37c 1320 sifdown(f->unit);
grzemich 0:d7bd7384a37c 1321 ipcp_clear_addrs(f->unit);
grzemich 0:d7bd7384a37c 1322 }
grzemich 0:d7bd7384a37c 1323
grzemich 0:d7bd7384a37c 1324
grzemich 0:d7bd7384a37c 1325 /*
grzemich 0:d7bd7384a37c 1326 * ipcp_clear_addrs() - clear the interface addresses, routes, etc.
grzemich 0:d7bd7384a37c 1327 */
grzemich 0:d7bd7384a37c 1328 static void
grzemich 0:d7bd7384a37c 1329 ipcp_clear_addrs(int unit)
grzemich 0:d7bd7384a37c 1330 {
grzemich 0:d7bd7384a37c 1331 u32_t ouraddr, hisaddr;
grzemich 0:d7bd7384a37c 1332
grzemich 0:d7bd7384a37c 1333 ouraddr = ipcp_gotoptions[unit].ouraddr;
grzemich 0:d7bd7384a37c 1334 hisaddr = ipcp_hisoptions[unit].hisaddr;
grzemich 0:d7bd7384a37c 1335 if (default_route_set[unit]) {
grzemich 0:d7bd7384a37c 1336 cifdefaultroute(unit, ouraddr, hisaddr);
grzemich 0:d7bd7384a37c 1337 default_route_set[unit] = 0;
grzemich 0:d7bd7384a37c 1338 }
grzemich 0:d7bd7384a37c 1339 cifaddr(unit, ouraddr, hisaddr);
grzemich 0:d7bd7384a37c 1340 }
grzemich 0:d7bd7384a37c 1341
grzemich 0:d7bd7384a37c 1342
grzemich 0:d7bd7384a37c 1343 /*
grzemich 0:d7bd7384a37c 1344 * ipcp_finished - possibly shut down the lower layers.
grzemich 0:d7bd7384a37c 1345 */
grzemich 0:d7bd7384a37c 1346 static void
grzemich 0:d7bd7384a37c 1347 ipcp_finished(fsm *f)
grzemich 0:d7bd7384a37c 1348 {
grzemich 0:d7bd7384a37c 1349 np_finished(f->unit, PPP_IP);
grzemich 0:d7bd7384a37c 1350 }
grzemich 0:d7bd7384a37c 1351
grzemich 0:d7bd7384a37c 1352 #if PPP_ADDITIONAL_CALLBACKS
grzemich 0:d7bd7384a37c 1353 static int
grzemich 0:d7bd7384a37c 1354 ipcp_printpkt(u_char *p, int plen, void (*printer) (void *, char *, ...), void *arg)
grzemich 0:d7bd7384a37c 1355 {
grzemich 0:d7bd7384a37c 1356 LWIP_UNUSED_ARG(p);
grzemich 0:d7bd7384a37c 1357 LWIP_UNUSED_ARG(plen);
grzemich 0:d7bd7384a37c 1358 LWIP_UNUSED_ARG(printer);
grzemich 0:d7bd7384a37c 1359 LWIP_UNUSED_ARG(arg);
grzemich 0:d7bd7384a37c 1360 return 0;
grzemich 0:d7bd7384a37c 1361 }
grzemich 0:d7bd7384a37c 1362
grzemich 0:d7bd7384a37c 1363 /*
grzemich 0:d7bd7384a37c 1364 * ip_active_pkt - see if this IP packet is worth bringing the link up for.
grzemich 0:d7bd7384a37c 1365 * We don't bring the link up for IP fragments or for TCP FIN packets
grzemich 0:d7bd7384a37c 1366 * with no data.
grzemich 0:d7bd7384a37c 1367 */
grzemich 0:d7bd7384a37c 1368 #define IP_HDRLEN 20 /* bytes */
grzemich 0:d7bd7384a37c 1369 #define IP_OFFMASK 0x1fff
grzemich 0:d7bd7384a37c 1370 #define IPPROTO_TCP 6
grzemich 0:d7bd7384a37c 1371 #define TCP_HDRLEN 20
grzemich 0:d7bd7384a37c 1372 #define TH_FIN 0x01
grzemich 0:d7bd7384a37c 1373
grzemich 0:d7bd7384a37c 1374 /*
grzemich 0:d7bd7384a37c 1375 * We use these macros because the IP header may be at an odd address,
grzemich 0:d7bd7384a37c 1376 * and some compilers might use word loads to get th_off or ip_hl.
grzemich 0:d7bd7384a37c 1377 */
grzemich 0:d7bd7384a37c 1378
grzemich 0:d7bd7384a37c 1379 #define net_short(x) (((x)[0] << 8) + (x)[1])
grzemich 0:d7bd7384a37c 1380 #define get_iphl(x) (((unsigned char *)(x))[0] & 0xF)
grzemich 0:d7bd7384a37c 1381 #define get_ipoff(x) net_short((unsigned char *)(x) + 6)
grzemich 0:d7bd7384a37c 1382 #define get_ipproto(x) (((unsigned char *)(x))[9])
grzemich 0:d7bd7384a37c 1383 #define get_tcpoff(x) (((unsigned char *)(x))[12] >> 4)
grzemich 0:d7bd7384a37c 1384 #define get_tcpflags(x) (((unsigned char *)(x))[13])
grzemich 0:d7bd7384a37c 1385
grzemich 0:d7bd7384a37c 1386 static int
grzemich 0:d7bd7384a37c 1387 ip_active_pkt(u_char *pkt, int len)
grzemich 0:d7bd7384a37c 1388 {
grzemich 0:d7bd7384a37c 1389 u_char *tcp;
grzemich 0:d7bd7384a37c 1390 int hlen;
grzemich 0:d7bd7384a37c 1391
grzemich 0:d7bd7384a37c 1392 len -= PPP_HDRLEN;
grzemich 0:d7bd7384a37c 1393 pkt += PPP_HDRLEN;
grzemich 0:d7bd7384a37c 1394 if (len < IP_HDRLEN) {
grzemich 0:d7bd7384a37c 1395 return 0;
grzemich 0:d7bd7384a37c 1396 }
grzemich 0:d7bd7384a37c 1397 if ((get_ipoff(pkt) & IP_OFFMASK) != 0) {
grzemich 0:d7bd7384a37c 1398 return 0;
grzemich 0:d7bd7384a37c 1399 }
grzemich 0:d7bd7384a37c 1400 if (get_ipproto(pkt) != IPPROTO_TCP) {
grzemich 0:d7bd7384a37c 1401 return 1;
grzemich 0:d7bd7384a37c 1402 }
grzemich 0:d7bd7384a37c 1403 hlen = get_iphl(pkt) * 4;
grzemich 0:d7bd7384a37c 1404 if (len < hlen + TCP_HDRLEN) {
grzemich 0:d7bd7384a37c 1405 return 0;
grzemich 0:d7bd7384a37c 1406 }
grzemich 0:d7bd7384a37c 1407 tcp = pkt + hlen;
grzemich 0:d7bd7384a37c 1408 if ((get_tcpflags(tcp) & TH_FIN) != 0 && len == hlen + get_tcpoff(tcp) * 4) {
grzemich 0:d7bd7384a37c 1409 return 0;
grzemich 0:d7bd7384a37c 1410 }
grzemich 0:d7bd7384a37c 1411 return 1;
grzemich 0:d7bd7384a37c 1412 }
grzemich 0:d7bd7384a37c 1413 #endif /* PPP_ADDITIONAL_CALLBACKS */
grzemich 0:d7bd7384a37c 1414
grzemich 0:d7bd7384a37c 1415 #endif /* PPP_SUPPORT */