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lwip/netif/ppp/ipcp.c@0:b2805b6888dc, 2016-06-20 (annotated)

Committer:
robert_jw
Date:
Mon Jun 20 01:40:20 2016 +0000
Revision:
0:b2805b6888dc
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Who changed what in which revision?

UserRevisionLine numberNew contents of line
robert_jw 0:b2805b6888dc 1 /** In contrast to pppd 2.3.1, DNS support has been added, proxy-ARP and
robert_jw 0:b2805b6888dc 2 dial-on-demand has been stripped. */
robert_jw 0:b2805b6888dc 3 /*****************************************************************************
robert_jw 0:b2805b6888dc 4 * ipcp.c - Network PPP IP Control Protocol program file.
robert_jw 0:b2805b6888dc 5 *
robert_jw 0:b2805b6888dc 6 * Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
robert_jw 0:b2805b6888dc 7 * portions Copyright (c) 1997 by Global Election Systems Inc.
robert_jw 0:b2805b6888dc 8 *
robert_jw 0:b2805b6888dc 9 * The authors hereby grant permission to use, copy, modify, distribute,
robert_jw 0:b2805b6888dc 10 * and license this software and its documentation for any purpose, provided
robert_jw 0:b2805b6888dc 11 * that existing copyright notices are retained in all copies and that this
robert_jw 0:b2805b6888dc 12 * notice and the following disclaimer are included verbatim in any
robert_jw 0:b2805b6888dc 13 * distributions. No written agreement, license, or royalty fee is required
robert_jw 0:b2805b6888dc 14 * for any of the authorized uses.
robert_jw 0:b2805b6888dc 15 *
robert_jw 0:b2805b6888dc 16 * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
robert_jw 0:b2805b6888dc 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
robert_jw 0:b2805b6888dc 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
robert_jw 0:b2805b6888dc 19 * IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
robert_jw 0:b2805b6888dc 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
robert_jw 0:b2805b6888dc 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
robert_jw 0:b2805b6888dc 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
robert_jw 0:b2805b6888dc 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
robert_jw 0:b2805b6888dc 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
robert_jw 0:b2805b6888dc 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
robert_jw 0:b2805b6888dc 26 *
robert_jw 0:b2805b6888dc 27 ******************************************************************************
robert_jw 0:b2805b6888dc 28 * REVISION HISTORY
robert_jw 0:b2805b6888dc 29 *
robert_jw 0:b2805b6888dc 30 * 03-01-01 Marc Boucher <marc@mbsi.ca>
robert_jw 0:b2805b6888dc 31 * Ported to lwIP.
robert_jw 0:b2805b6888dc 32 * 97-12-08 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
robert_jw 0:b2805b6888dc 33 * Original.
robert_jw 0:b2805b6888dc 34 *****************************************************************************/
robert_jw 0:b2805b6888dc 35 /*
robert_jw 0:b2805b6888dc 36 * ipcp.c - PPP IP Control Protocol.
robert_jw 0:b2805b6888dc 37 *
robert_jw 0:b2805b6888dc 38 * Copyright (c) 1989 Carnegie Mellon University.
robert_jw 0:b2805b6888dc 39 * All rights reserved.
robert_jw 0:b2805b6888dc 40 *
robert_jw 0:b2805b6888dc 41 * Redistribution and use in source and binary forms are permitted
robert_jw 0:b2805b6888dc 42 * provided that the above copyright notice and this paragraph are
robert_jw 0:b2805b6888dc 43 * duplicated in all such forms and that any documentation,
robert_jw 0:b2805b6888dc 44 * advertising materials, and other materials related to such
robert_jw 0:b2805b6888dc 45 * distribution and use acknowledge that the software was developed
robert_jw 0:b2805b6888dc 46 * by Carnegie Mellon University. The name of the
robert_jw 0:b2805b6888dc 47 * University may not be used to endorse or promote products derived
robert_jw 0:b2805b6888dc 48 * from this software without specific prior written permission.
robert_jw 0:b2805b6888dc 49 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
robert_jw 0:b2805b6888dc 50 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
robert_jw 0:b2805b6888dc 51 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
robert_jw 0:b2805b6888dc 52 */
robert_jw 0:b2805b6888dc 53
robert_jw 0:b2805b6888dc 54 #include "lwip/opt.h"
robert_jw 0:b2805b6888dc 55
robert_jw 0:b2805b6888dc 56 #if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
robert_jw 0:b2805b6888dc 57
robert_jw 0:b2805b6888dc 58 #include "ppp.h"
robert_jw 0:b2805b6888dc 59 #include "pppdebug.h"
robert_jw 0:b2805b6888dc 60
robert_jw 0:b2805b6888dc 61 #include "auth.h"
robert_jw 0:b2805b6888dc 62 #include "fsm.h"
robert_jw 0:b2805b6888dc 63 #include "vj.h"
robert_jw 0:b2805b6888dc 64 #include "ipcp.h"
robert_jw 0:b2805b6888dc 65
robert_jw 0:b2805b6888dc 66 #include "lwip/inet.h"
robert_jw 0:b2805b6888dc 67
robert_jw 0:b2805b6888dc 68 #include <string.h>
robert_jw 0:b2805b6888dc 69
robert_jw 0:b2805b6888dc 70 /* #define OLD_CI_ADDRS 1 */ /* Support deprecated address negotiation. */
robert_jw 0:b2805b6888dc 71
robert_jw 0:b2805b6888dc 72 /* global vars */
robert_jw 0:b2805b6888dc 73 ipcp_options ipcp_wantoptions[NUM_PPP]; /* Options that we want to request */
robert_jw 0:b2805b6888dc 74 ipcp_options ipcp_gotoptions[NUM_PPP]; /* Options that peer ack'd */
robert_jw 0:b2805b6888dc 75 ipcp_options ipcp_allowoptions[NUM_PPP]; /* Options we allow peer to request */
robert_jw 0:b2805b6888dc 76 ipcp_options ipcp_hisoptions[NUM_PPP]; /* Options that we ack'd */
robert_jw 0:b2805b6888dc 77
robert_jw 0:b2805b6888dc 78 /* local vars */
robert_jw 0:b2805b6888dc 79 static int default_route_set[NUM_PPP]; /* Have set up a default route */
robert_jw 0:b2805b6888dc 80 static int cis_received[NUM_PPP]; /* # Conf-Reqs received */
robert_jw 0:b2805b6888dc 81
robert_jw 0:b2805b6888dc 82
robert_jw 0:b2805b6888dc 83 /*
robert_jw 0:b2805b6888dc 84 * Callbacks for fsm code. (CI = Configuration Information)
robert_jw 0:b2805b6888dc 85 */
robert_jw 0:b2805b6888dc 86 static void ipcp_resetci (fsm *); /* Reset our CI */
robert_jw 0:b2805b6888dc 87 static int ipcp_cilen (fsm *); /* Return length of our CI */
robert_jw 0:b2805b6888dc 88 static void ipcp_addci (fsm *, u_char *, int *); /* Add our CI */
robert_jw 0:b2805b6888dc 89 static int ipcp_ackci (fsm *, u_char *, int); /* Peer ack'd our CI */
robert_jw 0:b2805b6888dc 90 static int ipcp_nakci (fsm *, u_char *, int); /* Peer nak'd our CI */
robert_jw 0:b2805b6888dc 91 static int ipcp_rejci (fsm *, u_char *, int); /* Peer rej'd our CI */
robert_jw 0:b2805b6888dc 92 static int ipcp_reqci (fsm *, u_char *, int *, int); /* Rcv CI */
robert_jw 0:b2805b6888dc 93 static void ipcp_up (fsm *); /* We're UP */
robert_jw 0:b2805b6888dc 94 static void ipcp_down (fsm *); /* We're DOWN */
robert_jw 0:b2805b6888dc 95 #if PPP_ADDITIONAL_CALLBACKS
robert_jw 0:b2805b6888dc 96 static void ipcp_script (fsm *, char *); /* Run an up/down script */
robert_jw 0:b2805b6888dc 97 #endif
robert_jw 0:b2805b6888dc 98 static void ipcp_finished (fsm *); /* Don't need lower layer */
robert_jw 0:b2805b6888dc 99
robert_jw 0:b2805b6888dc 100
robert_jw 0:b2805b6888dc 101 fsm ipcp_fsm[NUM_PPP]; /* IPCP fsm structure */
robert_jw 0:b2805b6888dc 102
robert_jw 0:b2805b6888dc 103
robert_jw 0:b2805b6888dc 104 static fsm_callbacks ipcp_callbacks = { /* IPCP callback routines */
robert_jw 0:b2805b6888dc 105 ipcp_resetci, /* Reset our Configuration Information */
robert_jw 0:b2805b6888dc 106 ipcp_cilen, /* Length of our Configuration Information */
robert_jw 0:b2805b6888dc 107 ipcp_addci, /* Add our Configuration Information */
robert_jw 0:b2805b6888dc 108 ipcp_ackci, /* ACK our Configuration Information */
robert_jw 0:b2805b6888dc 109 ipcp_nakci, /* NAK our Configuration Information */
robert_jw 0:b2805b6888dc 110 ipcp_rejci, /* Reject our Configuration Information */
robert_jw 0:b2805b6888dc 111 ipcp_reqci, /* Request peer's Configuration Information */
robert_jw 0:b2805b6888dc 112 ipcp_up, /* Called when fsm reaches LS_OPENED state */
robert_jw 0:b2805b6888dc 113 ipcp_down, /* Called when fsm leaves LS_OPENED state */
robert_jw 0:b2805b6888dc 114 NULL, /* Called when we want the lower layer up */
robert_jw 0:b2805b6888dc 115 ipcp_finished, /* Called when we want the lower layer down */
robert_jw 0:b2805b6888dc 116 NULL, /* Called when Protocol-Reject received */
robert_jw 0:b2805b6888dc 117 NULL, /* Retransmission is necessary */
robert_jw 0:b2805b6888dc 118 NULL, /* Called to handle protocol-specific codes */
robert_jw 0:b2805b6888dc 119 "IPCP" /* String name of protocol */
robert_jw 0:b2805b6888dc 120 };
robert_jw 0:b2805b6888dc 121
robert_jw 0:b2805b6888dc 122 /*
robert_jw 0:b2805b6888dc 123 * Protocol entry points from main code.
robert_jw 0:b2805b6888dc 124 */
robert_jw 0:b2805b6888dc 125 static void ipcp_init (int);
robert_jw 0:b2805b6888dc 126 static void ipcp_open (int);
robert_jw 0:b2805b6888dc 127 static void ipcp_close (int, char *);
robert_jw 0:b2805b6888dc 128 static void ipcp_lowerup (int);
robert_jw 0:b2805b6888dc 129 static void ipcp_lowerdown (int);
robert_jw 0:b2805b6888dc 130 static void ipcp_input (int, u_char *, int);
robert_jw 0:b2805b6888dc 131 static void ipcp_protrej (int);
robert_jw 0:b2805b6888dc 132
robert_jw 0:b2805b6888dc 133
robert_jw 0:b2805b6888dc 134 struct protent ipcp_protent = {
robert_jw 0:b2805b6888dc 135 PPP_IPCP,
robert_jw 0:b2805b6888dc 136 ipcp_init,
robert_jw 0:b2805b6888dc 137 ipcp_input,
robert_jw 0:b2805b6888dc 138 ipcp_protrej,
robert_jw 0:b2805b6888dc 139 ipcp_lowerup,
robert_jw 0:b2805b6888dc 140 ipcp_lowerdown,
robert_jw 0:b2805b6888dc 141 ipcp_open,
robert_jw 0:b2805b6888dc 142 ipcp_close,
robert_jw 0:b2805b6888dc 143 #if PPP_ADDITIONAL_CALLBACKS
robert_jw 0:b2805b6888dc 144 ipcp_printpkt,
robert_jw 0:b2805b6888dc 145 NULL,
robert_jw 0:b2805b6888dc 146 #endif /* PPP_ADDITIONAL_CALLBACKS */
robert_jw 0:b2805b6888dc 147 1,
robert_jw 0:b2805b6888dc 148 "IPCP",
robert_jw 0:b2805b6888dc 149 #if PPP_ADDITIONAL_CALLBACKS
robert_jw 0:b2805b6888dc 150 ip_check_options,
robert_jw 0:b2805b6888dc 151 NULL,
robert_jw 0:b2805b6888dc 152 ip_active_pkt
robert_jw 0:b2805b6888dc 153 #endif /* PPP_ADDITIONAL_CALLBACKS */
robert_jw 0:b2805b6888dc 154 };
robert_jw 0:b2805b6888dc 155
robert_jw 0:b2805b6888dc 156 static void ipcp_clear_addrs (int);
robert_jw 0:b2805b6888dc 157
robert_jw 0:b2805b6888dc 158 /*
robert_jw 0:b2805b6888dc 159 * Lengths of configuration options.
robert_jw 0:b2805b6888dc 160 */
robert_jw 0:b2805b6888dc 161 #define CILEN_VOID 2
robert_jw 0:b2805b6888dc 162 #define CILEN_COMPRESS 4 /* min length for compression protocol opt. */
robert_jw 0:b2805b6888dc 163 #define CILEN_VJ 6 /* length for RFC1332 Van-Jacobson opt. */
robert_jw 0:b2805b6888dc 164 #define CILEN_ADDR 6 /* new-style single address option */
robert_jw 0:b2805b6888dc 165 #define CILEN_ADDRS 10 /* old-style dual address option */
robert_jw 0:b2805b6888dc 166
robert_jw 0:b2805b6888dc 167
robert_jw 0:b2805b6888dc 168 #define CODENAME(x) ((x) == CONFACK ? "ACK" : \
robert_jw 0:b2805b6888dc 169 (x) == CONFNAK ? "NAK" : "REJ")
robert_jw 0:b2805b6888dc 170
robert_jw 0:b2805b6888dc 171
robert_jw 0:b2805b6888dc 172 /*
robert_jw 0:b2805b6888dc 173 * ipcp_init - Initialize IPCP.
robert_jw 0:b2805b6888dc 174 */
robert_jw 0:b2805b6888dc 175 static void
robert_jw 0:b2805b6888dc 176 ipcp_init(int unit)
robert_jw 0:b2805b6888dc 177 {
robert_jw 0:b2805b6888dc 178 fsm *f = &ipcp_fsm[unit];
robert_jw 0:b2805b6888dc 179 ipcp_options *wo = &ipcp_wantoptions[unit];
robert_jw 0:b2805b6888dc 180 ipcp_options *ao = &ipcp_allowoptions[unit];
robert_jw 0:b2805b6888dc 181
robert_jw 0:b2805b6888dc 182 f->unit = unit;
robert_jw 0:b2805b6888dc 183 f->protocol = PPP_IPCP;
robert_jw 0:b2805b6888dc 184 f->callbacks = &ipcp_callbacks;
robert_jw 0:b2805b6888dc 185 fsm_init(&ipcp_fsm[unit]);
robert_jw 0:b2805b6888dc 186
robert_jw 0:b2805b6888dc 187 memset(wo, 0, sizeof(*wo));
robert_jw 0:b2805b6888dc 188 memset(ao, 0, sizeof(*ao));
robert_jw 0:b2805b6888dc 189
robert_jw 0:b2805b6888dc 190 wo->neg_addr = 1;
robert_jw 0:b2805b6888dc 191 wo->ouraddr = 0;
robert_jw 0:b2805b6888dc 192 #if VJ_SUPPORT
robert_jw 0:b2805b6888dc 193 wo->neg_vj = 1;
robert_jw 0:b2805b6888dc 194 #else /* VJ_SUPPORT */
robert_jw 0:b2805b6888dc 195 wo->neg_vj = 0;
robert_jw 0:b2805b6888dc 196 #endif /* VJ_SUPPORT */
robert_jw 0:b2805b6888dc 197 wo->vj_protocol = IPCP_VJ_COMP;
robert_jw 0:b2805b6888dc 198 wo->maxslotindex = MAX_SLOTS - 1;
robert_jw 0:b2805b6888dc 199 wo->cflag = 0;
robert_jw 0:b2805b6888dc 200 wo->default_route = 1;
robert_jw 0:b2805b6888dc 201
robert_jw 0:b2805b6888dc 202 ao->neg_addr = 1;
robert_jw 0:b2805b6888dc 203 #if VJ_SUPPORT
robert_jw 0:b2805b6888dc 204 ao->neg_vj = 1;
robert_jw 0:b2805b6888dc 205 #else /* VJ_SUPPORT */
robert_jw 0:b2805b6888dc 206 ao->neg_vj = 0;
robert_jw 0:b2805b6888dc 207 #endif /* VJ_SUPPORT */
robert_jw 0:b2805b6888dc 208 ao->maxslotindex = MAX_SLOTS - 1;
robert_jw 0:b2805b6888dc 209 ao->cflag = 1;
robert_jw 0:b2805b6888dc 210 ao->default_route = 1;
robert_jw 0:b2805b6888dc 211 }
robert_jw 0:b2805b6888dc 212
robert_jw 0:b2805b6888dc 213
robert_jw 0:b2805b6888dc 214 /*
robert_jw 0:b2805b6888dc 215 * ipcp_open - IPCP is allowed to come up.
robert_jw 0:b2805b6888dc 216 */
robert_jw 0:b2805b6888dc 217 static void
robert_jw 0:b2805b6888dc 218 ipcp_open(int unit)
robert_jw 0:b2805b6888dc 219 {
robert_jw 0:b2805b6888dc 220 fsm_open(&ipcp_fsm[unit]);
robert_jw 0:b2805b6888dc 221 }
robert_jw 0:b2805b6888dc 222
robert_jw 0:b2805b6888dc 223
robert_jw 0:b2805b6888dc 224 /*
robert_jw 0:b2805b6888dc 225 * ipcp_close - Take IPCP down.
robert_jw 0:b2805b6888dc 226 */
robert_jw 0:b2805b6888dc 227 static void
robert_jw 0:b2805b6888dc 228 ipcp_close(int unit, char *reason)
robert_jw 0:b2805b6888dc 229 {
robert_jw 0:b2805b6888dc 230 fsm_close(&ipcp_fsm[unit], reason);
robert_jw 0:b2805b6888dc 231 }
robert_jw 0:b2805b6888dc 232
robert_jw 0:b2805b6888dc 233
robert_jw 0:b2805b6888dc 234 /*
robert_jw 0:b2805b6888dc 235 * ipcp_lowerup - The lower layer is up.
robert_jw 0:b2805b6888dc 236 */
robert_jw 0:b2805b6888dc 237 static void
robert_jw 0:b2805b6888dc 238 ipcp_lowerup(int unit)
robert_jw 0:b2805b6888dc 239 {
robert_jw 0:b2805b6888dc 240 fsm_lowerup(&ipcp_fsm[unit]);
robert_jw 0:b2805b6888dc 241 }
robert_jw 0:b2805b6888dc 242
robert_jw 0:b2805b6888dc 243
robert_jw 0:b2805b6888dc 244 /*
robert_jw 0:b2805b6888dc 245 * ipcp_lowerdown - The lower layer is down.
robert_jw 0:b2805b6888dc 246 */
robert_jw 0:b2805b6888dc 247 static void
robert_jw 0:b2805b6888dc 248 ipcp_lowerdown(int unit)
robert_jw 0:b2805b6888dc 249 {
robert_jw 0:b2805b6888dc 250 fsm_lowerdown(&ipcp_fsm[unit]);
robert_jw 0:b2805b6888dc 251 }
robert_jw 0:b2805b6888dc 252
robert_jw 0:b2805b6888dc 253
robert_jw 0:b2805b6888dc 254 /*
robert_jw 0:b2805b6888dc 255 * ipcp_input - Input IPCP packet.
robert_jw 0:b2805b6888dc 256 */
robert_jw 0:b2805b6888dc 257 static void
robert_jw 0:b2805b6888dc 258 ipcp_input(int unit, u_char *p, int len)
robert_jw 0:b2805b6888dc 259 {
robert_jw 0:b2805b6888dc 260 fsm_input(&ipcp_fsm[unit], p, len);
robert_jw 0:b2805b6888dc 261 }
robert_jw 0:b2805b6888dc 262
robert_jw 0:b2805b6888dc 263
robert_jw 0:b2805b6888dc 264 /*
robert_jw 0:b2805b6888dc 265 * ipcp_protrej - A Protocol-Reject was received for IPCP.
robert_jw 0:b2805b6888dc 266 *
robert_jw 0:b2805b6888dc 267 * Pretend the lower layer went down, so we shut up.
robert_jw 0:b2805b6888dc 268 */
robert_jw 0:b2805b6888dc 269 static void
robert_jw 0:b2805b6888dc 270 ipcp_protrej(int unit)
robert_jw 0:b2805b6888dc 271 {
robert_jw 0:b2805b6888dc 272 fsm_lowerdown(&ipcp_fsm[unit]);
robert_jw 0:b2805b6888dc 273 }
robert_jw 0:b2805b6888dc 274
robert_jw 0:b2805b6888dc 275
robert_jw 0:b2805b6888dc 276 /*
robert_jw 0:b2805b6888dc 277 * ipcp_resetci - Reset our CI.
robert_jw 0:b2805b6888dc 278 */
robert_jw 0:b2805b6888dc 279 static void
robert_jw 0:b2805b6888dc 280 ipcp_resetci(fsm *f)
robert_jw 0:b2805b6888dc 281 {
robert_jw 0:b2805b6888dc 282 ipcp_options *wo = &ipcp_wantoptions[f->unit];
robert_jw 0:b2805b6888dc 283
robert_jw 0:b2805b6888dc 284 wo->req_addr = wo->neg_addr && ipcp_allowoptions[f->unit].neg_addr;
robert_jw 0:b2805b6888dc 285 if (wo->ouraddr == 0) {
robert_jw 0:b2805b6888dc 286 wo->accept_local = 1;
robert_jw 0:b2805b6888dc 287 }
robert_jw 0:b2805b6888dc 288 if (wo->hisaddr == 0) {
robert_jw 0:b2805b6888dc 289 wo->accept_remote = 1;
robert_jw 0:b2805b6888dc 290 }
robert_jw 0:b2805b6888dc 291 /* Request DNS addresses from the peer */
robert_jw 0:b2805b6888dc 292 wo->req_dns1 = ppp_settings.usepeerdns;
robert_jw 0:b2805b6888dc 293 wo->req_dns2 = ppp_settings.usepeerdns;
robert_jw 0:b2805b6888dc 294 ipcp_gotoptions[f->unit] = *wo;
robert_jw 0:b2805b6888dc 295 cis_received[f->unit] = 0;
robert_jw 0:b2805b6888dc 296 }
robert_jw 0:b2805b6888dc 297
robert_jw 0:b2805b6888dc 298
robert_jw 0:b2805b6888dc 299 /*
robert_jw 0:b2805b6888dc 300 * ipcp_cilen - Return length of our CI.
robert_jw 0:b2805b6888dc 301 */
robert_jw 0:b2805b6888dc 302 static int
robert_jw 0:b2805b6888dc 303 ipcp_cilen(fsm *f)
robert_jw 0:b2805b6888dc 304 {
robert_jw 0:b2805b6888dc 305 ipcp_options *go = &ipcp_gotoptions[f->unit];
robert_jw 0:b2805b6888dc 306 ipcp_options *wo = &ipcp_wantoptions[f->unit];
robert_jw 0:b2805b6888dc 307 ipcp_options *ho = &ipcp_hisoptions[f->unit];
robert_jw 0:b2805b6888dc 308
robert_jw 0:b2805b6888dc 309 #define LENCIVJ(neg, old) (neg ? (old? CILEN_COMPRESS : CILEN_VJ) : 0)
robert_jw 0:b2805b6888dc 310 #define LENCIADDR(neg, old) (neg ? (old? CILEN_ADDRS : CILEN_ADDR) : 0)
robert_jw 0:b2805b6888dc 311 #define LENCIDNS(neg) (neg ? (CILEN_ADDR) : 0)
robert_jw 0:b2805b6888dc 312
robert_jw 0:b2805b6888dc 313 /*
robert_jw 0:b2805b6888dc 314 * First see if we want to change our options to the old
robert_jw 0:b2805b6888dc 315 * forms because we have received old forms from the peer.
robert_jw 0:b2805b6888dc 316 */
robert_jw 0:b2805b6888dc 317 if (wo->neg_addr && !go->neg_addr && !go->old_addrs) {
robert_jw 0:b2805b6888dc 318 /* use the old style of address negotiation */
robert_jw 0:b2805b6888dc 319 go->neg_addr = 1;
robert_jw 0:b2805b6888dc 320 go->old_addrs = 1;
robert_jw 0:b2805b6888dc 321 }
robert_jw 0:b2805b6888dc 322 if (wo->neg_vj && !go->neg_vj && !go->old_vj) {
robert_jw 0:b2805b6888dc 323 /* try an older style of VJ negotiation */
robert_jw 0:b2805b6888dc 324 if (cis_received[f->unit] == 0) {
robert_jw 0:b2805b6888dc 325 /* keep trying the new style until we see some CI from the peer */
robert_jw 0:b2805b6888dc 326 go->neg_vj = 1;
robert_jw 0:b2805b6888dc 327 } else {
robert_jw 0:b2805b6888dc 328 /* use the old style only if the peer did */
robert_jw 0:b2805b6888dc 329 if (ho->neg_vj && ho->old_vj) {
robert_jw 0:b2805b6888dc 330 go->neg_vj = 1;
robert_jw 0:b2805b6888dc 331 go->old_vj = 1;
robert_jw 0:b2805b6888dc 332 go->vj_protocol = ho->vj_protocol;
robert_jw 0:b2805b6888dc 333 }
robert_jw 0:b2805b6888dc 334 }
robert_jw 0:b2805b6888dc 335 }
robert_jw 0:b2805b6888dc 336
robert_jw 0:b2805b6888dc 337 return (LENCIADDR(go->neg_addr, go->old_addrs) +
robert_jw 0:b2805b6888dc 338 LENCIVJ(go->neg_vj, go->old_vj) +
robert_jw 0:b2805b6888dc 339 LENCIDNS(go->req_dns1) +
robert_jw 0:b2805b6888dc 340 LENCIDNS(go->req_dns2));
robert_jw 0:b2805b6888dc 341 }
robert_jw 0:b2805b6888dc 342
robert_jw 0:b2805b6888dc 343
robert_jw 0:b2805b6888dc 344 /*
robert_jw 0:b2805b6888dc 345 * ipcp_addci - Add our desired CIs to a packet.
robert_jw 0:b2805b6888dc 346 */
robert_jw 0:b2805b6888dc 347 static void
robert_jw 0:b2805b6888dc 348 ipcp_addci(fsm *f, u_char *ucp, int *lenp)
robert_jw 0:b2805b6888dc 349 {
robert_jw 0:b2805b6888dc 350 ipcp_options *go = &ipcp_gotoptions[f->unit];
robert_jw 0:b2805b6888dc 351 int len = *lenp;
robert_jw 0:b2805b6888dc 352
robert_jw 0:b2805b6888dc 353 #define ADDCIVJ(opt, neg, val, old, maxslotindex, cflag) \
robert_jw 0:b2805b6888dc 354 if (neg) { \
robert_jw 0:b2805b6888dc 355 int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \
robert_jw 0:b2805b6888dc 356 if (len >= vjlen) { \
robert_jw 0:b2805b6888dc 357 PUTCHAR(opt, ucp); \
robert_jw 0:b2805b6888dc 358 PUTCHAR(vjlen, ucp); \
robert_jw 0:b2805b6888dc 359 PUTSHORT(val, ucp); \
robert_jw 0:b2805b6888dc 360 if (!old) { \
robert_jw 0:b2805b6888dc 361 PUTCHAR(maxslotindex, ucp); \
robert_jw 0:b2805b6888dc 362 PUTCHAR(cflag, ucp); \
robert_jw 0:b2805b6888dc 363 } \
robert_jw 0:b2805b6888dc 364 len -= vjlen; \
robert_jw 0:b2805b6888dc 365 } else { \
robert_jw 0:b2805b6888dc 366 neg = 0; \
robert_jw 0:b2805b6888dc 367 } \
robert_jw 0:b2805b6888dc 368 }
robert_jw 0:b2805b6888dc 369
robert_jw 0:b2805b6888dc 370 #define ADDCIADDR(opt, neg, old, val1, val2) \
robert_jw 0:b2805b6888dc 371 if (neg) { \
robert_jw 0:b2805b6888dc 372 int addrlen = (old? CILEN_ADDRS: CILEN_ADDR); \
robert_jw 0:b2805b6888dc 373 if (len >= addrlen) { \
robert_jw 0:b2805b6888dc 374 u32_t l; \
robert_jw 0:b2805b6888dc 375 PUTCHAR(opt, ucp); \
robert_jw 0:b2805b6888dc 376 PUTCHAR(addrlen, ucp); \
robert_jw 0:b2805b6888dc 377 l = ntohl(val1); \
robert_jw 0:b2805b6888dc 378 PUTLONG(l, ucp); \
robert_jw 0:b2805b6888dc 379 if (old) { \
robert_jw 0:b2805b6888dc 380 l = ntohl(val2); \
robert_jw 0:b2805b6888dc 381 PUTLONG(l, ucp); \
robert_jw 0:b2805b6888dc 382 } \
robert_jw 0:b2805b6888dc 383 len -= addrlen; \
robert_jw 0:b2805b6888dc 384 } else { \
robert_jw 0:b2805b6888dc 385 neg = 0; \
robert_jw 0:b2805b6888dc 386 } \
robert_jw 0:b2805b6888dc 387 }
robert_jw 0:b2805b6888dc 388
robert_jw 0:b2805b6888dc 389 #define ADDCIDNS(opt, neg, addr) \
robert_jw 0:b2805b6888dc 390 if (neg) { \
robert_jw 0:b2805b6888dc 391 if (len >= CILEN_ADDR) { \
robert_jw 0:b2805b6888dc 392 u32_t l; \
robert_jw 0:b2805b6888dc 393 PUTCHAR(opt, ucp); \
robert_jw 0:b2805b6888dc 394 PUTCHAR(CILEN_ADDR, ucp); \
robert_jw 0:b2805b6888dc 395 l = ntohl(addr); \
robert_jw 0:b2805b6888dc 396 PUTLONG(l, ucp); \
robert_jw 0:b2805b6888dc 397 len -= CILEN_ADDR; \
robert_jw 0:b2805b6888dc 398 } else { \
robert_jw 0:b2805b6888dc 399 neg = 0; \
robert_jw 0:b2805b6888dc 400 } \
robert_jw 0:b2805b6888dc 401 }
robert_jw 0:b2805b6888dc 402
robert_jw 0:b2805b6888dc 403 ADDCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), go->neg_addr,
robert_jw 0:b2805b6888dc 404 go->old_addrs, go->ouraddr, go->hisaddr);
robert_jw 0:b2805b6888dc 405
robert_jw 0:b2805b6888dc 406 ADDCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj,
robert_jw 0:b2805b6888dc 407 go->maxslotindex, go->cflag);
robert_jw 0:b2805b6888dc 408
robert_jw 0:b2805b6888dc 409 ADDCIDNS(CI_MS_DNS1, go->req_dns1, go->dnsaddr[0]);
robert_jw 0:b2805b6888dc 410
robert_jw 0:b2805b6888dc 411 ADDCIDNS(CI_MS_DNS2, go->req_dns2, go->dnsaddr[1]);
robert_jw 0:b2805b6888dc 412
robert_jw 0:b2805b6888dc 413 *lenp -= len;
robert_jw 0:b2805b6888dc 414 }
robert_jw 0:b2805b6888dc 415
robert_jw 0:b2805b6888dc 416
robert_jw 0:b2805b6888dc 417 /*
robert_jw 0:b2805b6888dc 418 * ipcp_ackci - Ack our CIs.
robert_jw 0:b2805b6888dc 419 *
robert_jw 0:b2805b6888dc 420 * Returns:
robert_jw 0:b2805b6888dc 421 * 0 - Ack was bad.
robert_jw 0:b2805b6888dc 422 * 1 - Ack was good.
robert_jw 0:b2805b6888dc 423 */
robert_jw 0:b2805b6888dc 424 static int
robert_jw 0:b2805b6888dc 425 ipcp_ackci(fsm *f, u_char *p, int len)
robert_jw 0:b2805b6888dc 426 {
robert_jw 0:b2805b6888dc 427 ipcp_options *go = &ipcp_gotoptions[f->unit];
robert_jw 0:b2805b6888dc 428 u_short cilen, citype, cishort;
robert_jw 0:b2805b6888dc 429 u32_t cilong;
robert_jw 0:b2805b6888dc 430 u_char cimaxslotindex, cicflag;
robert_jw 0:b2805b6888dc 431
robert_jw 0:b2805b6888dc 432 /*
robert_jw 0:b2805b6888dc 433 * CIs must be in exactly the same order that we sent...
robert_jw 0:b2805b6888dc 434 * Check packet length and CI length at each step.
robert_jw 0:b2805b6888dc 435 * If we find any deviations, then this packet is bad.
robert_jw 0:b2805b6888dc 436 */
robert_jw 0:b2805b6888dc 437
robert_jw 0:b2805b6888dc 438 #define ACKCIVJ(opt, neg, val, old, maxslotindex, cflag) \
robert_jw 0:b2805b6888dc 439 if (neg) { \
robert_jw 0:b2805b6888dc 440 int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \
robert_jw 0:b2805b6888dc 441 if ((len -= vjlen) < 0) { \
robert_jw 0:b2805b6888dc 442 goto bad; \
robert_jw 0:b2805b6888dc 443 } \
robert_jw 0:b2805b6888dc 444 GETCHAR(citype, p); \
robert_jw 0:b2805b6888dc 445 GETCHAR(cilen, p); \
robert_jw 0:b2805b6888dc 446 if (cilen != vjlen || \
robert_jw 0:b2805b6888dc 447 citype != opt) { \
robert_jw 0:b2805b6888dc 448 goto bad; \
robert_jw 0:b2805b6888dc 449 } \
robert_jw 0:b2805b6888dc 450 GETSHORT(cishort, p); \
robert_jw 0:b2805b6888dc 451 if (cishort != val) { \
robert_jw 0:b2805b6888dc 452 goto bad; \
robert_jw 0:b2805b6888dc 453 } \
robert_jw 0:b2805b6888dc 454 if (!old) { \
robert_jw 0:b2805b6888dc 455 GETCHAR(cimaxslotindex, p); \
robert_jw 0:b2805b6888dc 456 if (cimaxslotindex != maxslotindex) { \
robert_jw 0:b2805b6888dc 457 goto bad; \
robert_jw 0:b2805b6888dc 458 } \
robert_jw 0:b2805b6888dc 459 GETCHAR(cicflag, p); \
robert_jw 0:b2805b6888dc 460 if (cicflag != cflag) { \
robert_jw 0:b2805b6888dc 461 goto bad; \
robert_jw 0:b2805b6888dc 462 } \
robert_jw 0:b2805b6888dc 463 } \
robert_jw 0:b2805b6888dc 464 }
robert_jw 0:b2805b6888dc 465
robert_jw 0:b2805b6888dc 466 #define ACKCIADDR(opt, neg, old, val1, val2) \
robert_jw 0:b2805b6888dc 467 if (neg) { \
robert_jw 0:b2805b6888dc 468 int addrlen = (old? CILEN_ADDRS: CILEN_ADDR); \
robert_jw 0:b2805b6888dc 469 u32_t l; \
robert_jw 0:b2805b6888dc 470 if ((len -= addrlen) < 0) { \
robert_jw 0:b2805b6888dc 471 goto bad; \
robert_jw 0:b2805b6888dc 472 } \
robert_jw 0:b2805b6888dc 473 GETCHAR(citype, p); \
robert_jw 0:b2805b6888dc 474 GETCHAR(cilen, p); \
robert_jw 0:b2805b6888dc 475 if (cilen != addrlen || \
robert_jw 0:b2805b6888dc 476 citype != opt) { \
robert_jw 0:b2805b6888dc 477 goto bad; \
robert_jw 0:b2805b6888dc 478 } \
robert_jw 0:b2805b6888dc 479 GETLONG(l, p); \
robert_jw 0:b2805b6888dc 480 cilong = htonl(l); \
robert_jw 0:b2805b6888dc 481 if (val1 != cilong) { \
robert_jw 0:b2805b6888dc 482 goto bad; \
robert_jw 0:b2805b6888dc 483 } \
robert_jw 0:b2805b6888dc 484 if (old) { \
robert_jw 0:b2805b6888dc 485 GETLONG(l, p); \
robert_jw 0:b2805b6888dc 486 cilong = htonl(l); \
robert_jw 0:b2805b6888dc 487 if (val2 != cilong) { \
robert_jw 0:b2805b6888dc 488 goto bad; \
robert_jw 0:b2805b6888dc 489 } \
robert_jw 0:b2805b6888dc 490 } \
robert_jw 0:b2805b6888dc 491 }
robert_jw 0:b2805b6888dc 492
robert_jw 0:b2805b6888dc 493 #define ACKCIDNS(opt, neg, addr) \
robert_jw 0:b2805b6888dc 494 if (neg) { \
robert_jw 0:b2805b6888dc 495 u32_t l; \
robert_jw 0:b2805b6888dc 496 if ((len -= CILEN_ADDR) < 0) { \
robert_jw 0:b2805b6888dc 497 goto bad; \
robert_jw 0:b2805b6888dc 498 } \
robert_jw 0:b2805b6888dc 499 GETCHAR(citype, p); \
robert_jw 0:b2805b6888dc 500 GETCHAR(cilen, p); \
robert_jw 0:b2805b6888dc 501 if (cilen != CILEN_ADDR || \
robert_jw 0:b2805b6888dc 502 citype != opt) { \
robert_jw 0:b2805b6888dc 503 goto bad; \
robert_jw 0:b2805b6888dc 504 } \
robert_jw 0:b2805b6888dc 505 GETLONG(l, p); \
robert_jw 0:b2805b6888dc 506 cilong = htonl(l); \
robert_jw 0:b2805b6888dc 507 if (addr != cilong) { \
robert_jw 0:b2805b6888dc 508 goto bad; \
robert_jw 0:b2805b6888dc 509 } \
robert_jw 0:b2805b6888dc 510 }
robert_jw 0:b2805b6888dc 511
robert_jw 0:b2805b6888dc 512 ACKCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), go->neg_addr,
robert_jw 0:b2805b6888dc 513 go->old_addrs, go->ouraddr, go->hisaddr);
robert_jw 0:b2805b6888dc 514
robert_jw 0:b2805b6888dc 515 ACKCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj,
robert_jw 0:b2805b6888dc 516 go->maxslotindex, go->cflag);
robert_jw 0:b2805b6888dc 517
robert_jw 0:b2805b6888dc 518 ACKCIDNS(CI_MS_DNS1, go->req_dns1, go->dnsaddr[0]);
robert_jw 0:b2805b6888dc 519
robert_jw 0:b2805b6888dc 520 ACKCIDNS(CI_MS_DNS2, go->req_dns2, go->dnsaddr[1]);
robert_jw 0:b2805b6888dc 521
robert_jw 0:b2805b6888dc 522 /*
robert_jw 0:b2805b6888dc 523 * If there are any remaining CIs, then this packet is bad.
robert_jw 0:b2805b6888dc 524 */
robert_jw 0:b2805b6888dc 525 if (len != 0) {
robert_jw 0:b2805b6888dc 526 goto bad;
robert_jw 0:b2805b6888dc 527 }
robert_jw 0:b2805b6888dc 528 return (1);
robert_jw 0:b2805b6888dc 529
robert_jw 0:b2805b6888dc 530 bad:
robert_jw 0:b2805b6888dc 531 IPCPDEBUG(LOG_INFO, ("ipcp_ackci: received bad Ack!\n"));
robert_jw 0:b2805b6888dc 532 return (0);
robert_jw 0:b2805b6888dc 533 }
robert_jw 0:b2805b6888dc 534
robert_jw 0:b2805b6888dc 535 /*
robert_jw 0:b2805b6888dc 536 * ipcp_nakci - Peer has sent a NAK for some of our CIs.
robert_jw 0:b2805b6888dc 537 * This should not modify any state if the Nak is bad
robert_jw 0:b2805b6888dc 538 * or if IPCP is in the LS_OPENED state.
robert_jw 0:b2805b6888dc 539 *
robert_jw 0:b2805b6888dc 540 * Returns:
robert_jw 0:b2805b6888dc 541 * 0 - Nak was bad.
robert_jw 0:b2805b6888dc 542 * 1 - Nak was good.
robert_jw 0:b2805b6888dc 543 */
robert_jw 0:b2805b6888dc 544 static int
robert_jw 0:b2805b6888dc 545 ipcp_nakci(fsm *f, u_char *p, int len)
robert_jw 0:b2805b6888dc 546 {
robert_jw 0:b2805b6888dc 547 ipcp_options *go = &ipcp_gotoptions[f->unit];
robert_jw 0:b2805b6888dc 548 u_char cimaxslotindex, cicflag;
robert_jw 0:b2805b6888dc 549 u_char citype, cilen, *next;
robert_jw 0:b2805b6888dc 550 u_short cishort;
robert_jw 0:b2805b6888dc 551 u32_t ciaddr1, ciaddr2, l, cidnsaddr;
robert_jw 0:b2805b6888dc 552 ipcp_options no; /* options we've seen Naks for */
robert_jw 0:b2805b6888dc 553 ipcp_options try; /* options to request next time */
robert_jw 0:b2805b6888dc 554
robert_jw 0:b2805b6888dc 555 BZERO(&no, sizeof(no));
robert_jw 0:b2805b6888dc 556 try = *go;
robert_jw 0:b2805b6888dc 557
robert_jw 0:b2805b6888dc 558 /*
robert_jw 0:b2805b6888dc 559 * Any Nak'd CIs must be in exactly the same order that we sent.
robert_jw 0:b2805b6888dc 560 * Check packet length and CI length at each step.
robert_jw 0:b2805b6888dc 561 * If we find any deviations, then this packet is bad.
robert_jw 0:b2805b6888dc 562 */
robert_jw 0:b2805b6888dc 563 #define NAKCIADDR(opt, neg, old, code) \
robert_jw 0:b2805b6888dc 564 if (go->neg && \
robert_jw 0:b2805b6888dc 565 len >= (cilen = (old? CILEN_ADDRS: CILEN_ADDR)) && \
robert_jw 0:b2805b6888dc 566 p[1] == cilen && \
robert_jw 0:b2805b6888dc 567 p[0] == opt) { \
robert_jw 0:b2805b6888dc 568 len -= cilen; \
robert_jw 0:b2805b6888dc 569 INCPTR(2, p); \
robert_jw 0:b2805b6888dc 570 GETLONG(l, p); \
robert_jw 0:b2805b6888dc 571 ciaddr1 = htonl(l); \
robert_jw 0:b2805b6888dc 572 if (old) { \
robert_jw 0:b2805b6888dc 573 GETLONG(l, p); \
robert_jw 0:b2805b6888dc 574 ciaddr2 = htonl(l); \
robert_jw 0:b2805b6888dc 575 no.old_addrs = 1; \
robert_jw 0:b2805b6888dc 576 } else { \
robert_jw 0:b2805b6888dc 577 ciaddr2 = 0; \
robert_jw 0:b2805b6888dc 578 } \
robert_jw 0:b2805b6888dc 579 no.neg = 1; \
robert_jw 0:b2805b6888dc 580 code \
robert_jw 0:b2805b6888dc 581 }
robert_jw 0:b2805b6888dc 582
robert_jw 0:b2805b6888dc 583 #define NAKCIVJ(opt, neg, code) \
robert_jw 0:b2805b6888dc 584 if (go->neg && \
robert_jw 0:b2805b6888dc 585 ((cilen = p[1]) == CILEN_COMPRESS || cilen == CILEN_VJ) && \
robert_jw 0:b2805b6888dc 586 len >= cilen && \
robert_jw 0:b2805b6888dc 587 p[0] == opt) { \
robert_jw 0:b2805b6888dc 588 len -= cilen; \
robert_jw 0:b2805b6888dc 589 INCPTR(2, p); \
robert_jw 0:b2805b6888dc 590 GETSHORT(cishort, p); \
robert_jw 0:b2805b6888dc 591 no.neg = 1; \
robert_jw 0:b2805b6888dc 592 code \
robert_jw 0:b2805b6888dc 593 }
robert_jw 0:b2805b6888dc 594
robert_jw 0:b2805b6888dc 595 #define NAKCIDNS(opt, neg, code) \
robert_jw 0:b2805b6888dc 596 if (go->neg && \
robert_jw 0:b2805b6888dc 597 ((cilen = p[1]) == CILEN_ADDR) && \
robert_jw 0:b2805b6888dc 598 len >= cilen && \
robert_jw 0:b2805b6888dc 599 p[0] == opt) { \
robert_jw 0:b2805b6888dc 600 len -= cilen; \
robert_jw 0:b2805b6888dc 601 INCPTR(2, p); \
robert_jw 0:b2805b6888dc 602 GETLONG(l, p); \
robert_jw 0:b2805b6888dc 603 cidnsaddr = htonl(l); \
robert_jw 0:b2805b6888dc 604 no.neg = 1; \
robert_jw 0:b2805b6888dc 605 code \
robert_jw 0:b2805b6888dc 606 }
robert_jw 0:b2805b6888dc 607
robert_jw 0:b2805b6888dc 608 /*
robert_jw 0:b2805b6888dc 609 * Accept the peer's idea of {our,his} address, if different
robert_jw 0:b2805b6888dc 610 * from our idea, only if the accept_{local,remote} flag is set.
robert_jw 0:b2805b6888dc 611 */
robert_jw 0:b2805b6888dc 612 NAKCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), neg_addr, go->old_addrs,
robert_jw 0:b2805b6888dc 613 if (go->accept_local && ciaddr1) { /* Do we know our address? */
robert_jw 0:b2805b6888dc 614 try.ouraddr = ciaddr1;
robert_jw 0:b2805b6888dc 615 IPCPDEBUG(LOG_INFO, ("local IP address %s\n",
robert_jw 0:b2805b6888dc 616 inet_ntoa(ciaddr1)));
robert_jw 0:b2805b6888dc 617 }
robert_jw 0:b2805b6888dc 618 if (go->accept_remote && ciaddr2) { /* Does he know his? */
robert_jw 0:b2805b6888dc 619 try.hisaddr = ciaddr2;
robert_jw 0:b2805b6888dc 620 IPCPDEBUG(LOG_INFO, ("remote IP address %s\n",
robert_jw 0:b2805b6888dc 621 inet_ntoa(ciaddr2)));
robert_jw 0:b2805b6888dc 622 }
robert_jw 0:b2805b6888dc 623 );
robert_jw 0:b2805b6888dc 624
robert_jw 0:b2805b6888dc 625 /*
robert_jw 0:b2805b6888dc 626 * Accept the peer's value of maxslotindex provided that it
robert_jw 0:b2805b6888dc 627 * is less than what we asked for. Turn off slot-ID compression
robert_jw 0:b2805b6888dc 628 * if the peer wants. Send old-style compress-type option if
robert_jw 0:b2805b6888dc 629 * the peer wants.
robert_jw 0:b2805b6888dc 630 */
robert_jw 0:b2805b6888dc 631 NAKCIVJ(CI_COMPRESSTYPE, neg_vj,
robert_jw 0:b2805b6888dc 632 if (cilen == CILEN_VJ) {
robert_jw 0:b2805b6888dc 633 GETCHAR(cimaxslotindex, p);
robert_jw 0:b2805b6888dc 634 GETCHAR(cicflag, p);
robert_jw 0:b2805b6888dc 635 if (cishort == IPCP_VJ_COMP) {
robert_jw 0:b2805b6888dc 636 try.old_vj = 0;
robert_jw 0:b2805b6888dc 637 if (cimaxslotindex < go->maxslotindex) {
robert_jw 0:b2805b6888dc 638 try.maxslotindex = cimaxslotindex;
robert_jw 0:b2805b6888dc 639 }
robert_jw 0:b2805b6888dc 640 if (!cicflag) {
robert_jw 0:b2805b6888dc 641 try.cflag = 0;
robert_jw 0:b2805b6888dc 642 }
robert_jw 0:b2805b6888dc 643 } else {
robert_jw 0:b2805b6888dc 644 try.neg_vj = 0;
robert_jw 0:b2805b6888dc 645 }
robert_jw 0:b2805b6888dc 646 } else {
robert_jw 0:b2805b6888dc 647 if (cishort == IPCP_VJ_COMP || cishort == IPCP_VJ_COMP_OLD) {
robert_jw 0:b2805b6888dc 648 try.old_vj = 1;
robert_jw 0:b2805b6888dc 649 try.vj_protocol = cishort;
robert_jw 0:b2805b6888dc 650 } else {
robert_jw 0:b2805b6888dc 651 try.neg_vj = 0;
robert_jw 0:b2805b6888dc 652 }
robert_jw 0:b2805b6888dc 653 }
robert_jw 0:b2805b6888dc 654 );
robert_jw 0:b2805b6888dc 655
robert_jw 0:b2805b6888dc 656 NAKCIDNS(CI_MS_DNS1, req_dns1,
robert_jw 0:b2805b6888dc 657 try.dnsaddr[0] = cidnsaddr;
robert_jw 0:b2805b6888dc 658 IPCPDEBUG(LOG_INFO, ("primary DNS address %s\n", inet_ntoa(cidnsaddr)));
robert_jw 0:b2805b6888dc 659 );
robert_jw 0:b2805b6888dc 660
robert_jw 0:b2805b6888dc 661 NAKCIDNS(CI_MS_DNS2, req_dns2,
robert_jw 0:b2805b6888dc 662 try.dnsaddr[1] = cidnsaddr;
robert_jw 0:b2805b6888dc 663 IPCPDEBUG(LOG_INFO, ("secondary DNS address %s\n", inet_ntoa(cidnsaddr)));
robert_jw 0:b2805b6888dc 664 );
robert_jw 0:b2805b6888dc 665
robert_jw 0:b2805b6888dc 666 /*
robert_jw 0:b2805b6888dc 667 * There may be remaining CIs, if the peer is requesting negotiation
robert_jw 0:b2805b6888dc 668 * on an option that we didn't include in our request packet.
robert_jw 0:b2805b6888dc 669 * If they want to negotiate about IP addresses, we comply.
robert_jw 0:b2805b6888dc 670 * If they want us to ask for compression, we refuse.
robert_jw 0:b2805b6888dc 671 */
robert_jw 0:b2805b6888dc 672 while (len > CILEN_VOID) {
robert_jw 0:b2805b6888dc 673 GETCHAR(citype, p);
robert_jw 0:b2805b6888dc 674 GETCHAR(cilen, p);
robert_jw 0:b2805b6888dc 675 if( (len -= cilen) < 0 ) {
robert_jw 0:b2805b6888dc 676 goto bad;
robert_jw 0:b2805b6888dc 677 }
robert_jw 0:b2805b6888dc 678 next = p + cilen - 2;
robert_jw 0:b2805b6888dc 679
robert_jw 0:b2805b6888dc 680 switch (citype) {
robert_jw 0:b2805b6888dc 681 case CI_COMPRESSTYPE:
robert_jw 0:b2805b6888dc 682 if (go->neg_vj || no.neg_vj ||
robert_jw 0:b2805b6888dc 683 (cilen != CILEN_VJ && cilen != CILEN_COMPRESS)) {
robert_jw 0:b2805b6888dc 684 goto bad;
robert_jw 0:b2805b6888dc 685 }
robert_jw 0:b2805b6888dc 686 no.neg_vj = 1;
robert_jw 0:b2805b6888dc 687 break;
robert_jw 0:b2805b6888dc 688 case CI_ADDRS:
robert_jw 0:b2805b6888dc 689 if ((go->neg_addr && go->old_addrs) || no.old_addrs
robert_jw 0:b2805b6888dc 690 || cilen != CILEN_ADDRS) {
robert_jw 0:b2805b6888dc 691 goto bad;
robert_jw 0:b2805b6888dc 692 }
robert_jw 0:b2805b6888dc 693 try.neg_addr = 1;
robert_jw 0:b2805b6888dc 694 try.old_addrs = 1;
robert_jw 0:b2805b6888dc 695 GETLONG(l, p);
robert_jw 0:b2805b6888dc 696 ciaddr1 = htonl(l);
robert_jw 0:b2805b6888dc 697 if (ciaddr1 && go->accept_local) {
robert_jw 0:b2805b6888dc 698 try.ouraddr = ciaddr1;
robert_jw 0:b2805b6888dc 699 }
robert_jw 0:b2805b6888dc 700 GETLONG(l, p);
robert_jw 0:b2805b6888dc 701 ciaddr2 = htonl(l);
robert_jw 0:b2805b6888dc 702 if (ciaddr2 && go->accept_remote) {
robert_jw 0:b2805b6888dc 703 try.hisaddr = ciaddr2;
robert_jw 0:b2805b6888dc 704 }
robert_jw 0:b2805b6888dc 705 no.old_addrs = 1;
robert_jw 0:b2805b6888dc 706 break;
robert_jw 0:b2805b6888dc 707 case CI_ADDR:
robert_jw 0:b2805b6888dc 708 if (go->neg_addr || no.neg_addr || cilen != CILEN_ADDR) {
robert_jw 0:b2805b6888dc 709 goto bad;
robert_jw 0:b2805b6888dc 710 }
robert_jw 0:b2805b6888dc 711 try.old_addrs = 0;
robert_jw 0:b2805b6888dc 712 GETLONG(l, p);
robert_jw 0:b2805b6888dc 713 ciaddr1 = htonl(l);
robert_jw 0:b2805b6888dc 714 if (ciaddr1 && go->accept_local) {
robert_jw 0:b2805b6888dc 715 try.ouraddr = ciaddr1;
robert_jw 0:b2805b6888dc 716 }
robert_jw 0:b2805b6888dc 717 if (try.ouraddr != 0) {
robert_jw 0:b2805b6888dc 718 try.neg_addr = 1;
robert_jw 0:b2805b6888dc 719 }
robert_jw 0:b2805b6888dc 720 no.neg_addr = 1;
robert_jw 0:b2805b6888dc 721 break;
robert_jw 0:b2805b6888dc 722 }
robert_jw 0:b2805b6888dc 723 p = next;
robert_jw 0:b2805b6888dc 724 }
robert_jw 0:b2805b6888dc 725
robert_jw 0:b2805b6888dc 726 /* If there is still anything left, this packet is bad. */
robert_jw 0:b2805b6888dc 727 if (len != 0) {
robert_jw 0:b2805b6888dc 728 goto bad;
robert_jw 0:b2805b6888dc 729 }
robert_jw 0:b2805b6888dc 730
robert_jw 0:b2805b6888dc 731 /*
robert_jw 0:b2805b6888dc 732 * OK, the Nak is good. Now we can update state.
robert_jw 0:b2805b6888dc 733 */
robert_jw 0:b2805b6888dc 734 if (f->state != LS_OPENED) {
robert_jw 0:b2805b6888dc 735 *go = try;
robert_jw 0:b2805b6888dc 736 }
robert_jw 0:b2805b6888dc 737
robert_jw 0:b2805b6888dc 738 return 1;
robert_jw 0:b2805b6888dc 739
robert_jw 0:b2805b6888dc 740 bad:
robert_jw 0:b2805b6888dc 741 IPCPDEBUG(LOG_INFO, ("ipcp_nakci: received bad Nak!\n"));
robert_jw 0:b2805b6888dc 742 return 0;
robert_jw 0:b2805b6888dc 743 }
robert_jw 0:b2805b6888dc 744
robert_jw 0:b2805b6888dc 745
robert_jw 0:b2805b6888dc 746 /*
robert_jw 0:b2805b6888dc 747 * ipcp_rejci - Reject some of our CIs.
robert_jw 0:b2805b6888dc 748 */
robert_jw 0:b2805b6888dc 749 static int
robert_jw 0:b2805b6888dc 750 ipcp_rejci(fsm *f, u_char *p, int len)
robert_jw 0:b2805b6888dc 751 {
robert_jw 0:b2805b6888dc 752 ipcp_options *go = &ipcp_gotoptions[f->unit];
robert_jw 0:b2805b6888dc 753 u_char cimaxslotindex, ciflag, cilen;
robert_jw 0:b2805b6888dc 754 u_short cishort;
robert_jw 0:b2805b6888dc 755 u32_t cilong;
robert_jw 0:b2805b6888dc 756 ipcp_options try; /* options to request next time */
robert_jw 0:b2805b6888dc 757
robert_jw 0:b2805b6888dc 758 try = *go;
robert_jw 0:b2805b6888dc 759 /*
robert_jw 0:b2805b6888dc 760 * Any Rejected CIs must be in exactly the same order that we sent.
robert_jw 0:b2805b6888dc 761 * Check packet length and CI length at each step.
robert_jw 0:b2805b6888dc 762 * If we find any deviations, then this packet is bad.
robert_jw 0:b2805b6888dc 763 */
robert_jw 0:b2805b6888dc 764 #define REJCIADDR(opt, neg, old, val1, val2) \
robert_jw 0:b2805b6888dc 765 if (go->neg && \
robert_jw 0:b2805b6888dc 766 len >= (cilen = old? CILEN_ADDRS: CILEN_ADDR) && \
robert_jw 0:b2805b6888dc 767 p[1] == cilen && \
robert_jw 0:b2805b6888dc 768 p[0] == opt) { \
robert_jw 0:b2805b6888dc 769 u32_t l; \
robert_jw 0:b2805b6888dc 770 len -= cilen; \
robert_jw 0:b2805b6888dc 771 INCPTR(2, p); \
robert_jw 0:b2805b6888dc 772 GETLONG(l, p); \
robert_jw 0:b2805b6888dc 773 cilong = htonl(l); \
robert_jw 0:b2805b6888dc 774 /* Check rejected value. */ \
robert_jw 0:b2805b6888dc 775 if (cilong != val1) { \
robert_jw 0:b2805b6888dc 776 goto bad; \
robert_jw 0:b2805b6888dc 777 } \
robert_jw 0:b2805b6888dc 778 if (old) { \
robert_jw 0:b2805b6888dc 779 GETLONG(l, p); \
robert_jw 0:b2805b6888dc 780 cilong = htonl(l); \
robert_jw 0:b2805b6888dc 781 /* Check rejected value. */ \
robert_jw 0:b2805b6888dc 782 if (cilong != val2) { \
robert_jw 0:b2805b6888dc 783 goto bad; \
robert_jw 0:b2805b6888dc 784 } \
robert_jw 0:b2805b6888dc 785 } \
robert_jw 0:b2805b6888dc 786 try.neg = 0; \
robert_jw 0:b2805b6888dc 787 }
robert_jw 0:b2805b6888dc 788
robert_jw 0:b2805b6888dc 789 #define REJCIVJ(opt, neg, val, old, maxslot, cflag) \
robert_jw 0:b2805b6888dc 790 if (go->neg && \
robert_jw 0:b2805b6888dc 791 p[1] == (old? CILEN_COMPRESS : CILEN_VJ) && \
robert_jw 0:b2805b6888dc 792 len >= p[1] && \
robert_jw 0:b2805b6888dc 793 p[0] == opt) { \
robert_jw 0:b2805b6888dc 794 len -= p[1]; \
robert_jw 0:b2805b6888dc 795 INCPTR(2, p); \
robert_jw 0:b2805b6888dc 796 GETSHORT(cishort, p); \
robert_jw 0:b2805b6888dc 797 /* Check rejected value. */ \
robert_jw 0:b2805b6888dc 798 if (cishort != val) { \
robert_jw 0:b2805b6888dc 799 goto bad; \
robert_jw 0:b2805b6888dc 800 } \
robert_jw 0:b2805b6888dc 801 if (!old) { \
robert_jw 0:b2805b6888dc 802 GETCHAR(cimaxslotindex, p); \
robert_jw 0:b2805b6888dc 803 if (cimaxslotindex != maxslot) { \
robert_jw 0:b2805b6888dc 804 goto bad; \
robert_jw 0:b2805b6888dc 805 } \
robert_jw 0:b2805b6888dc 806 GETCHAR(ciflag, p); \
robert_jw 0:b2805b6888dc 807 if (ciflag != cflag) { \
robert_jw 0:b2805b6888dc 808 goto bad; \
robert_jw 0:b2805b6888dc 809 } \
robert_jw 0:b2805b6888dc 810 } \
robert_jw 0:b2805b6888dc 811 try.neg = 0; \
robert_jw 0:b2805b6888dc 812 }
robert_jw 0:b2805b6888dc 813
robert_jw 0:b2805b6888dc 814 #define REJCIDNS(opt, neg, dnsaddr) \
robert_jw 0:b2805b6888dc 815 if (go->neg && \
robert_jw 0:b2805b6888dc 816 ((cilen = p[1]) == CILEN_ADDR) && \
robert_jw 0:b2805b6888dc 817 len >= cilen && \
robert_jw 0:b2805b6888dc 818 p[0] == opt) { \
robert_jw 0:b2805b6888dc 819 u32_t l; \
robert_jw 0:b2805b6888dc 820 len -= cilen; \
robert_jw 0:b2805b6888dc 821 INCPTR(2, p); \
robert_jw 0:b2805b6888dc 822 GETLONG(l, p); \
robert_jw 0:b2805b6888dc 823 cilong = htonl(l); \
robert_jw 0:b2805b6888dc 824 /* Check rejected value. */ \
robert_jw 0:b2805b6888dc 825 if (cilong != dnsaddr) { \
robert_jw 0:b2805b6888dc 826 goto bad; \
robert_jw 0:b2805b6888dc 827 } \
robert_jw 0:b2805b6888dc 828 try.neg = 0; \
robert_jw 0:b2805b6888dc 829 }
robert_jw 0:b2805b6888dc 830
robert_jw 0:b2805b6888dc 831 REJCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), neg_addr,
robert_jw 0:b2805b6888dc 832 go->old_addrs, go->ouraddr, go->hisaddr);
robert_jw 0:b2805b6888dc 833
robert_jw 0:b2805b6888dc 834 REJCIVJ(CI_COMPRESSTYPE, neg_vj, go->vj_protocol, go->old_vj,
robert_jw 0:b2805b6888dc 835 go->maxslotindex, go->cflag);
robert_jw 0:b2805b6888dc 836
robert_jw 0:b2805b6888dc 837 REJCIDNS(CI_MS_DNS1, req_dns1, go->dnsaddr[0]);
robert_jw 0:b2805b6888dc 838
robert_jw 0:b2805b6888dc 839 REJCIDNS(CI_MS_DNS2, req_dns2, go->dnsaddr[1]);
robert_jw 0:b2805b6888dc 840
robert_jw 0:b2805b6888dc 841 /*
robert_jw 0:b2805b6888dc 842 * If there are any remaining CIs, then this packet is bad.
robert_jw 0:b2805b6888dc 843 */
robert_jw 0:b2805b6888dc 844 if (len != 0) {
robert_jw 0:b2805b6888dc 845 goto bad;
robert_jw 0:b2805b6888dc 846 }
robert_jw 0:b2805b6888dc 847 /*
robert_jw 0:b2805b6888dc 848 * Now we can update state.
robert_jw 0:b2805b6888dc 849 */
robert_jw 0:b2805b6888dc 850 if (f->state != LS_OPENED) {
robert_jw 0:b2805b6888dc 851 *go = try;
robert_jw 0:b2805b6888dc 852 }
robert_jw 0:b2805b6888dc 853 return 1;
robert_jw 0:b2805b6888dc 854
robert_jw 0:b2805b6888dc 855 bad:
robert_jw 0:b2805b6888dc 856 IPCPDEBUG(LOG_INFO, ("ipcp_rejci: received bad Reject!\n"));
robert_jw 0:b2805b6888dc 857 return 0;
robert_jw 0:b2805b6888dc 858 }
robert_jw 0:b2805b6888dc 859
robert_jw 0:b2805b6888dc 860
robert_jw 0:b2805b6888dc 861 /*
robert_jw 0:b2805b6888dc 862 * ipcp_reqci - Check the peer's requested CIs and send appropriate response.
robert_jw 0:b2805b6888dc 863 *
robert_jw 0:b2805b6888dc 864 * Returns: CONFACK, CONFNAK or CONFREJ and input packet modified
robert_jw 0:b2805b6888dc 865 * appropriately. If reject_if_disagree is non-zero, doesn't return
robert_jw 0:b2805b6888dc 866 * CONFNAK; returns CONFREJ if it can't return CONFACK.
robert_jw 0:b2805b6888dc 867 */
robert_jw 0:b2805b6888dc 868 static int
robert_jw 0:b2805b6888dc 869 ipcp_reqci(fsm *f, u_char *inp/* Requested CIs */,int *len/* Length of requested CIs */,int reject_if_disagree)
robert_jw 0:b2805b6888dc 870 {
robert_jw 0:b2805b6888dc 871 ipcp_options *wo = &ipcp_wantoptions[f->unit];
robert_jw 0:b2805b6888dc 872 ipcp_options *ho = &ipcp_hisoptions[f->unit];
robert_jw 0:b2805b6888dc 873 ipcp_options *ao = &ipcp_allowoptions[f->unit];
robert_jw 0:b2805b6888dc 874 #ifdef OLD_CI_ADDRS
robert_jw 0:b2805b6888dc 875 ipcp_options *go = &ipcp_gotoptions[f->unit];
robert_jw 0:b2805b6888dc 876 #endif
robert_jw 0:b2805b6888dc 877 u_char *cip, *next; /* Pointer to current and next CIs */
robert_jw 0:b2805b6888dc 878 u_short cilen, citype; /* Parsed len, type */
robert_jw 0:b2805b6888dc 879 u_short cishort; /* Parsed short value */
robert_jw 0:b2805b6888dc 880 u32_t tl, ciaddr1; /* Parsed address values */
robert_jw 0:b2805b6888dc 881 #ifdef OLD_CI_ADDRS
robert_jw 0:b2805b6888dc 882 u32_t ciaddr2; /* Parsed address values */
robert_jw 0:b2805b6888dc 883 #endif
robert_jw 0:b2805b6888dc 884 int rc = CONFACK; /* Final packet return code */
robert_jw 0:b2805b6888dc 885 int orc; /* Individual option return code */
robert_jw 0:b2805b6888dc 886 u_char *p; /* Pointer to next char to parse */
robert_jw 0:b2805b6888dc 887 u_char *ucp = inp; /* Pointer to current output char */
robert_jw 0:b2805b6888dc 888 int l = *len; /* Length left */
robert_jw 0:b2805b6888dc 889 u_char maxslotindex, cflag;
robert_jw 0:b2805b6888dc 890 int d;
robert_jw 0:b2805b6888dc 891
robert_jw 0:b2805b6888dc 892 cis_received[f->unit] = 1;
robert_jw 0:b2805b6888dc 893
robert_jw 0:b2805b6888dc 894 /*
robert_jw 0:b2805b6888dc 895 * Reset all his options.
robert_jw 0:b2805b6888dc 896 */
robert_jw 0:b2805b6888dc 897 BZERO(ho, sizeof(*ho));
robert_jw 0:b2805b6888dc 898
robert_jw 0:b2805b6888dc 899 /*
robert_jw 0:b2805b6888dc 900 * Process all his options.
robert_jw 0:b2805b6888dc 901 */
robert_jw 0:b2805b6888dc 902 next = inp;
robert_jw 0:b2805b6888dc 903 while (l) {
robert_jw 0:b2805b6888dc 904 orc = CONFACK; /* Assume success */
robert_jw 0:b2805b6888dc 905 cip = p = next; /* Remember begining of CI */
robert_jw 0:b2805b6888dc 906 if (l < 2 || /* Not enough data for CI header or */
robert_jw 0:b2805b6888dc 907 p[1] < 2 || /* CI length too small or */
robert_jw 0:b2805b6888dc 908 p[1] > l) { /* CI length too big? */
robert_jw 0:b2805b6888dc 909 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: bad CI length!\n"));
robert_jw 0:b2805b6888dc 910 orc = CONFREJ; /* Reject bad CI */
robert_jw 0:b2805b6888dc 911 cilen = (u_short)l;/* Reject till end of packet */
robert_jw 0:b2805b6888dc 912 l = 0; /* Don't loop again */
robert_jw 0:b2805b6888dc 913 goto endswitch;
robert_jw 0:b2805b6888dc 914 }
robert_jw 0:b2805b6888dc 915 GETCHAR(citype, p); /* Parse CI type */
robert_jw 0:b2805b6888dc 916 GETCHAR(cilen, p); /* Parse CI length */
robert_jw 0:b2805b6888dc 917 l -= cilen; /* Adjust remaining length */
robert_jw 0:b2805b6888dc 918 next += cilen; /* Step to next CI */
robert_jw 0:b2805b6888dc 919
robert_jw 0:b2805b6888dc 920 switch (citype) { /* Check CI type */
robert_jw 0:b2805b6888dc 921 #ifdef OLD_CI_ADDRS /* Need to save space... */
robert_jw 0:b2805b6888dc 922 case CI_ADDRS:
robert_jw 0:b2805b6888dc 923 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received ADDRS\n"));
robert_jw 0:b2805b6888dc 924 if (!ao->neg_addr ||
robert_jw 0:b2805b6888dc 925 cilen != CILEN_ADDRS) { /* Check CI length */
robert_jw 0:b2805b6888dc 926 orc = CONFREJ; /* Reject CI */
robert_jw 0:b2805b6888dc 927 break;
robert_jw 0:b2805b6888dc 928 }
robert_jw 0:b2805b6888dc 929
robert_jw 0:b2805b6888dc 930 /*
robert_jw 0:b2805b6888dc 931 * If he has no address, or if we both have his address but
robert_jw 0:b2805b6888dc 932 * disagree about it, then NAK it with our idea.
robert_jw 0:b2805b6888dc 933 * In particular, if we don't know his address, but he does,
robert_jw 0:b2805b6888dc 934 * then accept it.
robert_jw 0:b2805b6888dc 935 */
robert_jw 0:b2805b6888dc 936 GETLONG(tl, p); /* Parse source address (his) */
robert_jw 0:b2805b6888dc 937 ciaddr1 = htonl(tl);
robert_jw 0:b2805b6888dc 938 IPCPDEBUG(LOG_INFO, ("his addr %s\n", inet_ntoa(ciaddr1)));
robert_jw 0:b2805b6888dc 939 if (ciaddr1 != wo->hisaddr
robert_jw 0:b2805b6888dc 940 && (ciaddr1 == 0 || !wo->accept_remote)) {
robert_jw 0:b2805b6888dc 941 orc = CONFNAK;
robert_jw 0:b2805b6888dc 942 if (!reject_if_disagree) {
robert_jw 0:b2805b6888dc 943 DECPTR(sizeof(u32_t), p);
robert_jw 0:b2805b6888dc 944 tl = ntohl(wo->hisaddr);
robert_jw 0:b2805b6888dc 945 PUTLONG(tl, p);
robert_jw 0:b2805b6888dc 946 }
robert_jw 0:b2805b6888dc 947 } else if (ciaddr1 == 0 && wo->hisaddr == 0) {
robert_jw 0:b2805b6888dc 948 /*
robert_jw 0:b2805b6888dc 949 * If neither we nor he knows his address, reject the option.
robert_jw 0:b2805b6888dc 950 */
robert_jw 0:b2805b6888dc 951 orc = CONFREJ;
robert_jw 0:b2805b6888dc 952 wo->req_addr = 0; /* don't NAK with 0.0.0.0 later */
robert_jw 0:b2805b6888dc 953 break;
robert_jw 0:b2805b6888dc 954 }
robert_jw 0:b2805b6888dc 955
robert_jw 0:b2805b6888dc 956 /*
robert_jw 0:b2805b6888dc 957 * If he doesn't know our address, or if we both have our address
robert_jw 0:b2805b6888dc 958 * but disagree about it, then NAK it with our idea.
robert_jw 0:b2805b6888dc 959 */
robert_jw 0:b2805b6888dc 960 GETLONG(tl, p); /* Parse desination address (ours) */
robert_jw 0:b2805b6888dc 961 ciaddr2 = htonl(tl);
robert_jw 0:b2805b6888dc 962 IPCPDEBUG(LOG_INFO, ("our addr %s\n", inet_ntoa(ciaddr2)));
robert_jw 0:b2805b6888dc 963 if (ciaddr2 != wo->ouraddr) {
robert_jw 0:b2805b6888dc 964 if (ciaddr2 == 0 || !wo->accept_local) {
robert_jw 0:b2805b6888dc 965 orc = CONFNAK;
robert_jw 0:b2805b6888dc 966 if (!reject_if_disagree) {
robert_jw 0:b2805b6888dc 967 DECPTR(sizeof(u32_t), p);
robert_jw 0:b2805b6888dc 968 tl = ntohl(wo->ouraddr);
robert_jw 0:b2805b6888dc 969 PUTLONG(tl, p);
robert_jw 0:b2805b6888dc 970 }
robert_jw 0:b2805b6888dc 971 } else {
robert_jw 0:b2805b6888dc 972 go->ouraddr = ciaddr2; /* accept peer's idea */
robert_jw 0:b2805b6888dc 973 }
robert_jw 0:b2805b6888dc 974 }
robert_jw 0:b2805b6888dc 975
robert_jw 0:b2805b6888dc 976 ho->neg_addr = 1;
robert_jw 0:b2805b6888dc 977 ho->old_addrs = 1;
robert_jw 0:b2805b6888dc 978 ho->hisaddr = ciaddr1;
robert_jw 0:b2805b6888dc 979 ho->ouraddr = ciaddr2;
robert_jw 0:b2805b6888dc 980 break;
robert_jw 0:b2805b6888dc 981 #endif
robert_jw 0:b2805b6888dc 982
robert_jw 0:b2805b6888dc 983 case CI_ADDR:
robert_jw 0:b2805b6888dc 984 if (!ao->neg_addr) {
robert_jw 0:b2805b6888dc 985 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR not allowed\n"));
robert_jw 0:b2805b6888dc 986 orc = CONFREJ; /* Reject CI */
robert_jw 0:b2805b6888dc 987 break;
robert_jw 0:b2805b6888dc 988 } else if (cilen != CILEN_ADDR) { /* Check CI length */
robert_jw 0:b2805b6888dc 989 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR bad len\n"));
robert_jw 0:b2805b6888dc 990 orc = CONFREJ; /* Reject CI */
robert_jw 0:b2805b6888dc 991 break;
robert_jw 0:b2805b6888dc 992 }
robert_jw 0:b2805b6888dc 993
robert_jw 0:b2805b6888dc 994 /*
robert_jw 0:b2805b6888dc 995 * If he has no address, or if we both have his address but
robert_jw 0:b2805b6888dc 996 * disagree about it, then NAK it with our idea.
robert_jw 0:b2805b6888dc 997 * In particular, if we don't know his address, but he does,
robert_jw 0:b2805b6888dc 998 * then accept it.
robert_jw 0:b2805b6888dc 999 */
robert_jw 0:b2805b6888dc 1000 GETLONG(tl, p); /* Parse source address (his) */
robert_jw 0:b2805b6888dc 1001 ciaddr1 = htonl(tl);
robert_jw 0:b2805b6888dc 1002 if (ciaddr1 != wo->hisaddr
robert_jw 0:b2805b6888dc 1003 && (ciaddr1 == 0 || !wo->accept_remote)) {
robert_jw 0:b2805b6888dc 1004 orc = CONFNAK;
robert_jw 0:b2805b6888dc 1005 if (!reject_if_disagree) {
robert_jw 0:b2805b6888dc 1006 DECPTR(sizeof(u32_t), p);
robert_jw 0:b2805b6888dc 1007 tl = ntohl(wo->hisaddr);
robert_jw 0:b2805b6888dc 1008 PUTLONG(tl, p);
robert_jw 0:b2805b6888dc 1009 }
robert_jw 0:b2805b6888dc 1010 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Nak ADDR %s\n", inet_ntoa(ciaddr1)));
robert_jw 0:b2805b6888dc 1011 } else if (ciaddr1 == 0 && wo->hisaddr == 0) {
robert_jw 0:b2805b6888dc 1012 /*
robert_jw 0:b2805b6888dc 1013 * Don't ACK an address of 0.0.0.0 - reject it instead.
robert_jw 0:b2805b6888dc 1014 */
robert_jw 0:b2805b6888dc 1015 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR %s\n", inet_ntoa(ciaddr1)));
robert_jw 0:b2805b6888dc 1016 orc = CONFREJ;
robert_jw 0:b2805b6888dc 1017 wo->req_addr = 0; /* don't NAK with 0.0.0.0 later */
robert_jw 0:b2805b6888dc 1018 break;
robert_jw 0:b2805b6888dc 1019 }
robert_jw 0:b2805b6888dc 1020
robert_jw 0:b2805b6888dc 1021 ho->neg_addr = 1;
robert_jw 0:b2805b6888dc 1022 ho->hisaddr = ciaddr1;
robert_jw 0:b2805b6888dc 1023 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: ADDR %s\n", inet_ntoa(ciaddr1)));
robert_jw 0:b2805b6888dc 1024 break;
robert_jw 0:b2805b6888dc 1025
robert_jw 0:b2805b6888dc 1026 case CI_MS_DNS1:
robert_jw 0:b2805b6888dc 1027 case CI_MS_DNS2:
robert_jw 0:b2805b6888dc 1028 /* Microsoft primary or secondary DNS request */
robert_jw 0:b2805b6888dc 1029 d = citype == CI_MS_DNS2;
robert_jw 0:b2805b6888dc 1030
robert_jw 0:b2805b6888dc 1031 /* If we do not have a DNS address then we cannot send it */
robert_jw 0:b2805b6888dc 1032 if (ao->dnsaddr[d] == 0 ||
robert_jw 0:b2805b6888dc 1033 cilen != CILEN_ADDR) { /* Check CI length */
robert_jw 0:b2805b6888dc 1034 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting DNS%d Request\n", d+1));
robert_jw 0:b2805b6888dc 1035 orc = CONFREJ; /* Reject CI */
robert_jw 0:b2805b6888dc 1036 break;
robert_jw 0:b2805b6888dc 1037 }
robert_jw 0:b2805b6888dc 1038 GETLONG(tl, p);
robert_jw 0:b2805b6888dc 1039 if (htonl(tl) != ao->dnsaddr[d]) {
robert_jw 0:b2805b6888dc 1040 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking DNS%d Request %s\n",
robert_jw 0:b2805b6888dc 1041 d+1, inet_ntoa(tl)));
robert_jw 0:b2805b6888dc 1042 DECPTR(sizeof(u32_t), p);
robert_jw 0:b2805b6888dc 1043 tl = ntohl(ao->dnsaddr[d]);
robert_jw 0:b2805b6888dc 1044 PUTLONG(tl, p);
robert_jw 0:b2805b6888dc 1045 orc = CONFNAK;
robert_jw 0:b2805b6888dc 1046 }
robert_jw 0:b2805b6888dc 1047 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received DNS%d Request\n", d+1));
robert_jw 0:b2805b6888dc 1048 break;
robert_jw 0:b2805b6888dc 1049
robert_jw 0:b2805b6888dc 1050 case CI_MS_WINS1:
robert_jw 0:b2805b6888dc 1051 case CI_MS_WINS2:
robert_jw 0:b2805b6888dc 1052 /* Microsoft primary or secondary WINS request */
robert_jw 0:b2805b6888dc 1053 d = citype == CI_MS_WINS2;
robert_jw 0:b2805b6888dc 1054 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received WINS%d Request\n", d+1));
robert_jw 0:b2805b6888dc 1055
robert_jw 0:b2805b6888dc 1056 /* If we do not have a DNS address then we cannot send it */
robert_jw 0:b2805b6888dc 1057 if (ao->winsaddr[d] == 0 ||
robert_jw 0:b2805b6888dc 1058 cilen != CILEN_ADDR) { /* Check CI length */
robert_jw 0:b2805b6888dc 1059 orc = CONFREJ; /* Reject CI */
robert_jw 0:b2805b6888dc 1060 break;
robert_jw 0:b2805b6888dc 1061 }
robert_jw 0:b2805b6888dc 1062 GETLONG(tl, p);
robert_jw 0:b2805b6888dc 1063 if (htonl(tl) != ao->winsaddr[d]) {
robert_jw 0:b2805b6888dc 1064 DECPTR(sizeof(u32_t), p);
robert_jw 0:b2805b6888dc 1065 tl = ntohl(ao->winsaddr[d]);
robert_jw 0:b2805b6888dc 1066 PUTLONG(tl, p);
robert_jw 0:b2805b6888dc 1067 orc = CONFNAK;
robert_jw 0:b2805b6888dc 1068 }
robert_jw 0:b2805b6888dc 1069 break;
robert_jw 0:b2805b6888dc 1070
robert_jw 0:b2805b6888dc 1071 case CI_COMPRESSTYPE:
robert_jw 0:b2805b6888dc 1072 if (!ao->neg_vj) {
robert_jw 0:b2805b6888dc 1073 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE not allowed\n"));
robert_jw 0:b2805b6888dc 1074 orc = CONFREJ;
robert_jw 0:b2805b6888dc 1075 break;
robert_jw 0:b2805b6888dc 1076 } else if (cilen != CILEN_VJ && cilen != CILEN_COMPRESS) {
robert_jw 0:b2805b6888dc 1077 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE len=%d\n", cilen));
robert_jw 0:b2805b6888dc 1078 orc = CONFREJ;
robert_jw 0:b2805b6888dc 1079 break;
robert_jw 0:b2805b6888dc 1080 }
robert_jw 0:b2805b6888dc 1081 GETSHORT(cishort, p);
robert_jw 0:b2805b6888dc 1082
robert_jw 0:b2805b6888dc 1083 if (!(cishort == IPCP_VJ_COMP ||
robert_jw 0:b2805b6888dc 1084 (cishort == IPCP_VJ_COMP_OLD && cilen == CILEN_COMPRESS))) {
robert_jw 0:b2805b6888dc 1085 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE %d\n", cishort));
robert_jw 0:b2805b6888dc 1086 orc = CONFREJ;
robert_jw 0:b2805b6888dc 1087 break;
robert_jw 0:b2805b6888dc 1088 }
robert_jw 0:b2805b6888dc 1089
robert_jw 0:b2805b6888dc 1090 ho->neg_vj = 1;
robert_jw 0:b2805b6888dc 1091 ho->vj_protocol = cishort;
robert_jw 0:b2805b6888dc 1092 if (cilen == CILEN_VJ) {
robert_jw 0:b2805b6888dc 1093 GETCHAR(maxslotindex, p);
robert_jw 0:b2805b6888dc 1094 if (maxslotindex > ao->maxslotindex) {
robert_jw 0:b2805b6888dc 1095 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking VJ max slot %d\n", maxslotindex));
robert_jw 0:b2805b6888dc 1096 orc = CONFNAK;
robert_jw 0:b2805b6888dc 1097 if (!reject_if_disagree) {
robert_jw 0:b2805b6888dc 1098 DECPTR(1, p);
robert_jw 0:b2805b6888dc 1099 PUTCHAR(ao->maxslotindex, p);
robert_jw 0:b2805b6888dc 1100 }
robert_jw 0:b2805b6888dc 1101 }
robert_jw 0:b2805b6888dc 1102 GETCHAR(cflag, p);
robert_jw 0:b2805b6888dc 1103 if (cflag && !ao->cflag) {
robert_jw 0:b2805b6888dc 1104 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking VJ cflag %d\n", cflag));
robert_jw 0:b2805b6888dc 1105 orc = CONFNAK;
robert_jw 0:b2805b6888dc 1106 if (!reject_if_disagree) {
robert_jw 0:b2805b6888dc 1107 DECPTR(1, p);
robert_jw 0:b2805b6888dc 1108 PUTCHAR(wo->cflag, p);
robert_jw 0:b2805b6888dc 1109 }
robert_jw 0:b2805b6888dc 1110 }
robert_jw 0:b2805b6888dc 1111 ho->maxslotindex = maxslotindex;
robert_jw 0:b2805b6888dc 1112 ho->cflag = cflag;
robert_jw 0:b2805b6888dc 1113 } else {
robert_jw 0:b2805b6888dc 1114 ho->old_vj = 1;
robert_jw 0:b2805b6888dc 1115 ho->maxslotindex = MAX_SLOTS - 1;
robert_jw 0:b2805b6888dc 1116 ho->cflag = 1;
robert_jw 0:b2805b6888dc 1117 }
robert_jw 0:b2805b6888dc 1118 IPCPDEBUG(LOG_INFO, (
robert_jw 0:b2805b6888dc 1119 "ipcp_reqci: received COMPRESSTYPE p=%d old=%d maxslot=%d cflag=%d\n",
robert_jw 0:b2805b6888dc 1120 ho->vj_protocol, ho->old_vj, ho->maxslotindex, ho->cflag));
robert_jw 0:b2805b6888dc 1121 break;
robert_jw 0:b2805b6888dc 1122
robert_jw 0:b2805b6888dc 1123 default:
robert_jw 0:b2805b6888dc 1124 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting unknown CI type %d\n", citype));
robert_jw 0:b2805b6888dc 1125 orc = CONFREJ;
robert_jw 0:b2805b6888dc 1126 break;
robert_jw 0:b2805b6888dc 1127 }
robert_jw 0:b2805b6888dc 1128
robert_jw 0:b2805b6888dc 1129 endswitch:
robert_jw 0:b2805b6888dc 1130 if (orc == CONFACK && /* Good CI */
robert_jw 0:b2805b6888dc 1131 rc != CONFACK) { /* but prior CI wasnt? */
robert_jw 0:b2805b6888dc 1132 continue; /* Don't send this one */
robert_jw 0:b2805b6888dc 1133 }
robert_jw 0:b2805b6888dc 1134
robert_jw 0:b2805b6888dc 1135 if (orc == CONFNAK) { /* Nak this CI? */
robert_jw 0:b2805b6888dc 1136 if (reject_if_disagree) { /* Getting fed up with sending NAKs? */
robert_jw 0:b2805b6888dc 1137 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting too many naks\n"));
robert_jw 0:b2805b6888dc 1138 orc = CONFREJ; /* Get tough if so */
robert_jw 0:b2805b6888dc 1139 } else {
robert_jw 0:b2805b6888dc 1140 if (rc == CONFREJ) { /* Rejecting prior CI? */
robert_jw 0:b2805b6888dc 1141 continue; /* Don't send this one */
robert_jw 0:b2805b6888dc 1142 }
robert_jw 0:b2805b6888dc 1143 if (rc == CONFACK) { /* Ack'd all prior CIs? */
robert_jw 0:b2805b6888dc 1144 rc = CONFNAK; /* Not anymore... */
robert_jw 0:b2805b6888dc 1145 ucp = inp; /* Backup */
robert_jw 0:b2805b6888dc 1146 }
robert_jw 0:b2805b6888dc 1147 }
robert_jw 0:b2805b6888dc 1148 }
robert_jw 0:b2805b6888dc 1149
robert_jw 0:b2805b6888dc 1150 if (orc == CONFREJ && /* Reject this CI */
robert_jw 0:b2805b6888dc 1151 rc != CONFREJ) { /* but no prior ones? */
robert_jw 0:b2805b6888dc 1152 rc = CONFREJ;
robert_jw 0:b2805b6888dc 1153 ucp = inp; /* Backup */
robert_jw 0:b2805b6888dc 1154 }
robert_jw 0:b2805b6888dc 1155
robert_jw 0:b2805b6888dc 1156 /* Need to move CI? */
robert_jw 0:b2805b6888dc 1157 if (ucp != cip) {
robert_jw 0:b2805b6888dc 1158 BCOPY(cip, ucp, cilen); /* Move it */
robert_jw 0:b2805b6888dc 1159 }
robert_jw 0:b2805b6888dc 1160
robert_jw 0:b2805b6888dc 1161 /* Update output pointer */
robert_jw 0:b2805b6888dc 1162 INCPTR(cilen, ucp);
robert_jw 0:b2805b6888dc 1163 }
robert_jw 0:b2805b6888dc 1164
robert_jw 0:b2805b6888dc 1165 /*
robert_jw 0:b2805b6888dc 1166 * If we aren't rejecting this packet, and we want to negotiate
robert_jw 0:b2805b6888dc 1167 * their address, and they didn't send their address, then we
robert_jw 0:b2805b6888dc 1168 * send a NAK with a CI_ADDR option appended. We assume the
robert_jw 0:b2805b6888dc 1169 * input buffer is long enough that we can append the extra
robert_jw 0:b2805b6888dc 1170 * option safely.
robert_jw 0:b2805b6888dc 1171 */
robert_jw 0:b2805b6888dc 1172 if (rc != CONFREJ && !ho->neg_addr &&
robert_jw 0:b2805b6888dc 1173 wo->req_addr && !reject_if_disagree) {
robert_jw 0:b2805b6888dc 1174 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Requesting peer address\n"));
robert_jw 0:b2805b6888dc 1175 if (rc == CONFACK) {
robert_jw 0:b2805b6888dc 1176 rc = CONFNAK;
robert_jw 0:b2805b6888dc 1177 ucp = inp; /* reset pointer */
robert_jw 0:b2805b6888dc 1178 wo->req_addr = 0; /* don't ask again */
robert_jw 0:b2805b6888dc 1179 }
robert_jw 0:b2805b6888dc 1180 PUTCHAR(CI_ADDR, ucp);
robert_jw 0:b2805b6888dc 1181 PUTCHAR(CILEN_ADDR, ucp);
robert_jw 0:b2805b6888dc 1182 tl = ntohl(wo->hisaddr);
robert_jw 0:b2805b6888dc 1183 PUTLONG(tl, ucp);
robert_jw 0:b2805b6888dc 1184 }
robert_jw 0:b2805b6888dc 1185
robert_jw 0:b2805b6888dc 1186 *len = (int)(ucp - inp); /* Compute output length */
robert_jw 0:b2805b6888dc 1187 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: returning Configure-%s\n", CODENAME(rc)));
robert_jw 0:b2805b6888dc 1188 return (rc); /* Return final code */
robert_jw 0:b2805b6888dc 1189 }
robert_jw 0:b2805b6888dc 1190
robert_jw 0:b2805b6888dc 1191
robert_jw 0:b2805b6888dc 1192 #if 0
robert_jw 0:b2805b6888dc 1193 /*
robert_jw 0:b2805b6888dc 1194 * ip_check_options - check that any IP-related options are OK,
robert_jw 0:b2805b6888dc 1195 * and assign appropriate defaults.
robert_jw 0:b2805b6888dc 1196 */
robert_jw 0:b2805b6888dc 1197 static void
robert_jw 0:b2805b6888dc 1198 ip_check_options(u_long localAddr)
robert_jw 0:b2805b6888dc 1199 {
robert_jw 0:b2805b6888dc 1200 ipcp_options *wo = &ipcp_wantoptions[0];
robert_jw 0:b2805b6888dc 1201
robert_jw 0:b2805b6888dc 1202 /*
robert_jw 0:b2805b6888dc 1203 * Load our default IP address but allow the remote host to give us
robert_jw 0:b2805b6888dc 1204 * a new address.
robert_jw 0:b2805b6888dc 1205 */
robert_jw 0:b2805b6888dc 1206 if (wo->ouraddr == 0 && !ppp_settings.disable_defaultip) {
robert_jw 0:b2805b6888dc 1207 wo->accept_local = 1; /* don't insist on this default value */
robert_jw 0:b2805b6888dc 1208 wo->ouraddr = htonl(localAddr);
robert_jw 0:b2805b6888dc 1209 }
robert_jw 0:b2805b6888dc 1210 }
robert_jw 0:b2805b6888dc 1211 #endif
robert_jw 0:b2805b6888dc 1212
robert_jw 0:b2805b6888dc 1213
robert_jw 0:b2805b6888dc 1214 /*
robert_jw 0:b2805b6888dc 1215 * ipcp_up - IPCP has come UP.
robert_jw 0:b2805b6888dc 1216 *
robert_jw 0:b2805b6888dc 1217 * Configure the IP network interface appropriately and bring it up.
robert_jw 0:b2805b6888dc 1218 */
robert_jw 0:b2805b6888dc 1219 static void
robert_jw 0:b2805b6888dc 1220 ipcp_up(fsm *f)
robert_jw 0:b2805b6888dc 1221 {
robert_jw 0:b2805b6888dc 1222 u32_t mask;
robert_jw 0:b2805b6888dc 1223 ipcp_options *ho = &ipcp_hisoptions[f->unit];
robert_jw 0:b2805b6888dc 1224 ipcp_options *go = &ipcp_gotoptions[f->unit];
robert_jw 0:b2805b6888dc 1225 ipcp_options *wo = &ipcp_wantoptions[f->unit];
robert_jw 0:b2805b6888dc 1226
robert_jw 0:b2805b6888dc 1227 np_up(f->unit, PPP_IP);
robert_jw 0:b2805b6888dc 1228 IPCPDEBUG(LOG_INFO, ("ipcp: up\n"));
robert_jw 0:b2805b6888dc 1229
robert_jw 0:b2805b6888dc 1230 /*
robert_jw 0:b2805b6888dc 1231 * We must have a non-zero IP address for both ends of the link.
robert_jw 0:b2805b6888dc 1232 */
robert_jw 0:b2805b6888dc 1233 if (!ho->neg_addr) {
robert_jw 0:b2805b6888dc 1234 ho->hisaddr = wo->hisaddr;
robert_jw 0:b2805b6888dc 1235 }
robert_jw 0:b2805b6888dc 1236
robert_jw 0:b2805b6888dc 1237 if (ho->hisaddr == 0) {
robert_jw 0:b2805b6888dc 1238 #if 0
robert_jw 0:b2805b6888dc 1239 IPCPDEBUG(LOG_ERR, ("Could not determine remote IP address\n"));
robert_jw 0:b2805b6888dc 1240 ipcp_close(f->unit, "Could not determine remote IP address");
robert_jw 0:b2805b6888dc 1241 return;
robert_jw 0:b2805b6888dc 1242 #else //Kludge
robert_jw 0:b2805b6888dc 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
robert_jw 0:b2805b6888dc 1244 #endif
robert_jw 0:b2805b6888dc 1245 }
robert_jw 0:b2805b6888dc 1246 if (go->ouraddr == 0) {
robert_jw 0:b2805b6888dc 1247 IPCPDEBUG(LOG_ERR, ("Could not determine local IP address\n"));
robert_jw 0:b2805b6888dc 1248 ipcp_close(f->unit, "Could not determine local IP address");
robert_jw 0:b2805b6888dc 1249 return;
robert_jw 0:b2805b6888dc 1250 }
robert_jw 0:b2805b6888dc 1251
robert_jw 0:b2805b6888dc 1252 if (ppp_settings.usepeerdns && (go->dnsaddr[0] || go->dnsaddr[1])) {
robert_jw 0:b2805b6888dc 1253 /*pppGotDNSAddrs(go->dnsaddr[0], go->dnsaddr[1]);*/
robert_jw 0:b2805b6888dc 1254 }
robert_jw 0:b2805b6888dc 1255
robert_jw 0:b2805b6888dc 1256 /*
robert_jw 0:b2805b6888dc 1257 * Check that the peer is allowed to use the IP address it wants.
robert_jw 0:b2805b6888dc 1258 */
robert_jw 0:b2805b6888dc 1259 if (!auth_ip_addr(f->unit, ho->hisaddr)) {
robert_jw 0:b2805b6888dc 1260 IPCPDEBUG(LOG_ERR, ("Peer is not authorized to use remote address %s\n",
robert_jw 0:b2805b6888dc 1261 inet_ntoa(ho->hisaddr)));
robert_jw 0:b2805b6888dc 1262 ipcp_close(f->unit, "Unauthorized remote IP address");
robert_jw 0:b2805b6888dc 1263 return;
robert_jw 0:b2805b6888dc 1264 }
robert_jw 0:b2805b6888dc 1265
robert_jw 0:b2805b6888dc 1266 /* set tcp compression */
robert_jw 0:b2805b6888dc 1267 sifvjcomp(f->unit, ho->neg_vj, ho->cflag, ho->maxslotindex);
robert_jw 0:b2805b6888dc 1268
robert_jw 0:b2805b6888dc 1269 /*
robert_jw 0:b2805b6888dc 1270 * Set IP addresses and (if specified) netmask.
robert_jw 0:b2805b6888dc 1271 */
robert_jw 0:b2805b6888dc 1272 mask = GetMask(go->ouraddr);
robert_jw 0:b2805b6888dc 1273
robert_jw 0:b2805b6888dc 1274 if (!sifaddr(f->unit, go->ouraddr, ho->hisaddr, mask, go->dnsaddr[0], go->dnsaddr[1])) {
robert_jw 0:b2805b6888dc 1275 IPCPDEBUG(LOG_WARNING, ("sifaddr failed\n"));
robert_jw 0:b2805b6888dc 1276 ipcp_close(f->unit, "Interface configuration failed");
robert_jw 0:b2805b6888dc 1277 return;
robert_jw 0:b2805b6888dc 1278 }
robert_jw 0:b2805b6888dc 1279
robert_jw 0:b2805b6888dc 1280 /* bring the interface up for IP */
robert_jw 0:b2805b6888dc 1281 if (!sifup(f->unit)) {
robert_jw 0:b2805b6888dc 1282 IPCPDEBUG(LOG_WARNING, ("sifup failed\n"));
robert_jw 0:b2805b6888dc 1283 ipcp_close(f->unit, "Interface configuration failed");
robert_jw 0:b2805b6888dc 1284 return;
robert_jw 0:b2805b6888dc 1285 }
robert_jw 0:b2805b6888dc 1286
robert_jw 0:b2805b6888dc 1287 sifnpmode(f->unit, PPP_IP, NPMODE_PASS);
robert_jw 0:b2805b6888dc 1288
robert_jw 0:b2805b6888dc 1289 /* assign a default route through the interface if required */
robert_jw 0:b2805b6888dc 1290 if (ipcp_wantoptions[f->unit].default_route) {
robert_jw 0:b2805b6888dc 1291 if (sifdefaultroute(f->unit, go->ouraddr, ho->hisaddr)) {
robert_jw 0:b2805b6888dc 1292 default_route_set[f->unit] = 1;
robert_jw 0:b2805b6888dc 1293 }
robert_jw 0:b2805b6888dc 1294 }
robert_jw 0:b2805b6888dc 1295
robert_jw 0:b2805b6888dc 1296 IPCPDEBUG(LOG_NOTICE, ("local IP address %s\n", inet_ntoa(go->ouraddr)));
robert_jw 0:b2805b6888dc 1297 IPCPDEBUG(LOG_NOTICE, ("remote IP address %s\n", inet_ntoa(ho->hisaddr)));
robert_jw 0:b2805b6888dc 1298 if (go->dnsaddr[0]) {
robert_jw 0:b2805b6888dc 1299 IPCPDEBUG(LOG_NOTICE, ("primary DNS address %s\n", inet_ntoa(go->dnsaddr[0])));
robert_jw 0:b2805b6888dc 1300 }
robert_jw 0:b2805b6888dc 1301 if (go->dnsaddr[1]) {
robert_jw 0:b2805b6888dc 1302 IPCPDEBUG(LOG_NOTICE, ("secondary DNS address %s\n", inet_ntoa(go->dnsaddr[1])));
robert_jw 0:b2805b6888dc 1303 }
robert_jw 0:b2805b6888dc 1304 }
robert_jw 0:b2805b6888dc 1305
robert_jw 0:b2805b6888dc 1306
robert_jw 0:b2805b6888dc 1307 /*
robert_jw 0:b2805b6888dc 1308 * ipcp_down - IPCP has gone DOWN.
robert_jw 0:b2805b6888dc 1309 *
robert_jw 0:b2805b6888dc 1310 * Take the IP network interface down, clear its addresses
robert_jw 0:b2805b6888dc 1311 * and delete routes through it.
robert_jw 0:b2805b6888dc 1312 */
robert_jw 0:b2805b6888dc 1313 static void
robert_jw 0:b2805b6888dc 1314 ipcp_down(fsm *f)
robert_jw 0:b2805b6888dc 1315 {
robert_jw 0:b2805b6888dc 1316 IPCPDEBUG(LOG_INFO, ("ipcp: down\n"));
robert_jw 0:b2805b6888dc 1317 np_down(f->unit, PPP_IP);
robert_jw 0:b2805b6888dc 1318 sifvjcomp(f->unit, 0, 0, 0);
robert_jw 0:b2805b6888dc 1319
robert_jw 0:b2805b6888dc 1320 sifdown(f->unit);
robert_jw 0:b2805b6888dc 1321 ipcp_clear_addrs(f->unit);
robert_jw 0:b2805b6888dc 1322 }
robert_jw 0:b2805b6888dc 1323
robert_jw 0:b2805b6888dc 1324
robert_jw 0:b2805b6888dc 1325 /*
robert_jw 0:b2805b6888dc 1326 * ipcp_clear_addrs() - clear the interface addresses, routes, etc.
robert_jw 0:b2805b6888dc 1327 */
robert_jw 0:b2805b6888dc 1328 static void
robert_jw 0:b2805b6888dc 1329 ipcp_clear_addrs(int unit)
robert_jw 0:b2805b6888dc 1330 {
robert_jw 0:b2805b6888dc 1331 u32_t ouraddr, hisaddr;
robert_jw 0:b2805b6888dc 1332
robert_jw 0:b2805b6888dc 1333 ouraddr = ipcp_gotoptions[unit].ouraddr;
robert_jw 0:b2805b6888dc 1334 hisaddr = ipcp_hisoptions[unit].hisaddr;
robert_jw 0:b2805b6888dc 1335 if (default_route_set[unit]) {
robert_jw 0:b2805b6888dc 1336 cifdefaultroute(unit, ouraddr, hisaddr);
robert_jw 0:b2805b6888dc 1337 default_route_set[unit] = 0;
robert_jw 0:b2805b6888dc 1338 }
robert_jw 0:b2805b6888dc 1339 cifaddr(unit, ouraddr, hisaddr);
robert_jw 0:b2805b6888dc 1340 }
robert_jw 0:b2805b6888dc 1341
robert_jw 0:b2805b6888dc 1342
robert_jw 0:b2805b6888dc 1343 /*
robert_jw 0:b2805b6888dc 1344 * ipcp_finished - possibly shut down the lower layers.
robert_jw 0:b2805b6888dc 1345 */
robert_jw 0:b2805b6888dc 1346 static void
robert_jw 0:b2805b6888dc 1347 ipcp_finished(fsm *f)
robert_jw 0:b2805b6888dc 1348 {
robert_jw 0:b2805b6888dc 1349 np_finished(f->unit, PPP_IP);
robert_jw 0:b2805b6888dc 1350 }
robert_jw 0:b2805b6888dc 1351
robert_jw 0:b2805b6888dc 1352 #if PPP_ADDITIONAL_CALLBACKS
robert_jw 0:b2805b6888dc 1353 static int
robert_jw 0:b2805b6888dc 1354 ipcp_printpkt(u_char *p, int plen, void (*printer) (void *, char *, ...), void *arg)
robert_jw 0:b2805b6888dc 1355 {
robert_jw 0:b2805b6888dc 1356 LWIP_UNUSED_ARG(p);
robert_jw 0:b2805b6888dc 1357 LWIP_UNUSED_ARG(plen);
robert_jw 0:b2805b6888dc 1358 LWIP_UNUSED_ARG(printer);
robert_jw 0:b2805b6888dc 1359 LWIP_UNUSED_ARG(arg);
robert_jw 0:b2805b6888dc 1360 return 0;
robert_jw 0:b2805b6888dc 1361 }
robert_jw 0:b2805b6888dc 1362
robert_jw 0:b2805b6888dc 1363 /*
robert_jw 0:b2805b6888dc 1364 * ip_active_pkt - see if this IP packet is worth bringing the link up for.
robert_jw 0:b2805b6888dc 1365 * We don't bring the link up for IP fragments or for TCP FIN packets
robert_jw 0:b2805b6888dc 1366 * with no data.
robert_jw 0:b2805b6888dc 1367 */
robert_jw 0:b2805b6888dc 1368 #define IP_HDRLEN 20 /* bytes */
robert_jw 0:b2805b6888dc 1369 #define IP_OFFMASK 0x1fff
robert_jw 0:b2805b6888dc 1370 #define IPPROTO_TCP 6
robert_jw 0:b2805b6888dc 1371 #define TCP_HDRLEN 20
robert_jw 0:b2805b6888dc 1372 #define TH_FIN 0x01
robert_jw 0:b2805b6888dc 1373
robert_jw 0:b2805b6888dc 1374 /*
robert_jw 0:b2805b6888dc 1375 * We use these macros because the IP header may be at an odd address,
robert_jw 0:b2805b6888dc 1376 * and some compilers might use word loads to get th_off or ip_hl.
robert_jw 0:b2805b6888dc 1377 */
robert_jw 0:b2805b6888dc 1378
robert_jw 0:b2805b6888dc 1379 #define net_short(x) (((x)[0] << 8) + (x)[1])
robert_jw 0:b2805b6888dc 1380 #define get_iphl(x) (((unsigned char *)(x))[0] & 0xF)
robert_jw 0:b2805b6888dc 1381 #define get_ipoff(x) net_short((unsigned char *)(x) + 6)
robert_jw 0:b2805b6888dc 1382 #define get_ipproto(x) (((unsigned char *)(x))[9])
robert_jw 0:b2805b6888dc 1383 #define get_tcpoff(x) (((unsigned char *)(x))[12] >> 4)
robert_jw 0:b2805b6888dc 1384 #define get_tcpflags(x) (((unsigned char *)(x))[13])
robert_jw 0:b2805b6888dc 1385
robert_jw 0:b2805b6888dc 1386 static int
robert_jw 0:b2805b6888dc 1387 ip_active_pkt(u_char *pkt, int len)
robert_jw 0:b2805b6888dc 1388 {
robert_jw 0:b2805b6888dc 1389 u_char *tcp;
robert_jw 0:b2805b6888dc 1390 int hlen;
robert_jw 0:b2805b6888dc 1391
robert_jw 0:b2805b6888dc 1392 len -= PPP_HDRLEN;
robert_jw 0:b2805b6888dc 1393 pkt += PPP_HDRLEN;
robert_jw 0:b2805b6888dc 1394 if (len < IP_HDRLEN) {
robert_jw 0:b2805b6888dc 1395 return 0;
robert_jw 0:b2805b6888dc 1396 }
robert_jw 0:b2805b6888dc 1397 if ((get_ipoff(pkt) & IP_OFFMASK) != 0) {
robert_jw 0:b2805b6888dc 1398 return 0;
robert_jw 0:b2805b6888dc 1399 }
robert_jw 0:b2805b6888dc 1400 if (get_ipproto(pkt) != IPPROTO_TCP) {
robert_jw 0:b2805b6888dc 1401 return 1;
robert_jw 0:b2805b6888dc 1402 }
robert_jw 0:b2805b6888dc 1403 hlen = get_iphl(pkt) * 4;
robert_jw 0:b2805b6888dc 1404 if (len < hlen + TCP_HDRLEN) {
robert_jw 0:b2805b6888dc 1405 return 0;
robert_jw 0:b2805b6888dc 1406 }
robert_jw 0:b2805b6888dc 1407 tcp = pkt + hlen;
robert_jw 0:b2805b6888dc 1408 if ((get_tcpflags(tcp) & TH_FIN) != 0 && len == hlen + get_tcpoff(tcp) * 4) {
robert_jw 0:b2805b6888dc 1409 return 0;
robert_jw 0:b2805b6888dc 1410 }
robert_jw 0:b2805b6888dc 1411 return 1;
robert_jw 0:b2805b6888dc 1412 }
robert_jw 0:b2805b6888dc 1413 #endif /* PPP_ADDITIONAL_CALLBACKS */
robert_jw 0:b2805b6888dc 1414
robert_jw 0:b2805b6888dc 1415 #endif /* PPP_SUPPORT */