Nino Der Kinderen / Mbed 2 deprecated InetTest

Embedded C project:18/12/2014

Dependencies:   DS1307 TextLCD mbed

NetServices/lwip/netif/ppp/ipcp.c@0:8d87bc453349, 2014-12-18 (annotated)

Committer:
ninoderkinderen
Date:
Thu Dec 18 09:35:49 2014 +0000
Revision:
0:8d87bc453349
Programma embedded C

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ninoderkinderen 0:8d87bc453349 1 /** In contrast to pppd 2.3.1, DNS support has been added, proxy-ARP and
ninoderkinderen 0:8d87bc453349 2 dial-on-demand has been stripped. */
ninoderkinderen 0:8d87bc453349 3 /*****************************************************************************
ninoderkinderen 0:8d87bc453349 4 * ipcp.c - Network PPP IP Control Protocol program file.
ninoderkinderen 0:8d87bc453349 5 *
ninoderkinderen 0:8d87bc453349 6 * Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
ninoderkinderen 0:8d87bc453349 7 * portions Copyright (c) 1997 by Global Election Systems Inc.
ninoderkinderen 0:8d87bc453349 8 *
ninoderkinderen 0:8d87bc453349 9 * The authors hereby grant permission to use, copy, modify, distribute,
ninoderkinderen 0:8d87bc453349 10 * and license this software and its documentation for any purpose, provided
ninoderkinderen 0:8d87bc453349 11 * that existing copyright notices are retained in all copies and that this
ninoderkinderen 0:8d87bc453349 12 * notice and the following disclaimer are included verbatim in any
ninoderkinderen 0:8d87bc453349 13 * distributions. No written agreement, license, or royalty fee is required
ninoderkinderen 0:8d87bc453349 14 * for any of the authorized uses.
ninoderkinderen 0:8d87bc453349 15 *
ninoderkinderen 0:8d87bc453349 16 * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
ninoderkinderen 0:8d87bc453349 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
ninoderkinderen 0:8d87bc453349 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
ninoderkinderen 0:8d87bc453349 19 * IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
ninoderkinderen 0:8d87bc453349 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
ninoderkinderen 0:8d87bc453349 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
ninoderkinderen 0:8d87bc453349 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
ninoderkinderen 0:8d87bc453349 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
ninoderkinderen 0:8d87bc453349 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
ninoderkinderen 0:8d87bc453349 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
ninoderkinderen 0:8d87bc453349 26 *
ninoderkinderen 0:8d87bc453349 27 ******************************************************************************
ninoderkinderen 0:8d87bc453349 28 * REVISION HISTORY
ninoderkinderen 0:8d87bc453349 29 *
ninoderkinderen 0:8d87bc453349 30 * 03-01-01 Marc Boucher <marc@mbsi.ca>
ninoderkinderen 0:8d87bc453349 31 * Ported to lwIP.
ninoderkinderen 0:8d87bc453349 32 * 97-12-08 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
ninoderkinderen 0:8d87bc453349 33 * Original.
ninoderkinderen 0:8d87bc453349 34 *****************************************************************************/
ninoderkinderen 0:8d87bc453349 35 /*
ninoderkinderen 0:8d87bc453349 36 * ipcp.c - PPP IP Control Protocol.
ninoderkinderen 0:8d87bc453349 37 *
ninoderkinderen 0:8d87bc453349 38 * Copyright (c) 1989 Carnegie Mellon University.
ninoderkinderen 0:8d87bc453349 39 * All rights reserved.
ninoderkinderen 0:8d87bc453349 40 *
ninoderkinderen 0:8d87bc453349 41 * Redistribution and use in source and binary forms are permitted
ninoderkinderen 0:8d87bc453349 42 * provided that the above copyright notice and this paragraph are
ninoderkinderen 0:8d87bc453349 43 * duplicated in all such forms and that any documentation,
ninoderkinderen 0:8d87bc453349 44 * advertising materials, and other materials related to such
ninoderkinderen 0:8d87bc453349 45 * distribution and use acknowledge that the software was developed
ninoderkinderen 0:8d87bc453349 46 * by Carnegie Mellon University. The name of the
ninoderkinderen 0:8d87bc453349 47 * University may not be used to endorse or promote products derived
ninoderkinderen 0:8d87bc453349 48 * from this software without specific prior written permission.
ninoderkinderen 0:8d87bc453349 49 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
ninoderkinderen 0:8d87bc453349 50 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
ninoderkinderen 0:8d87bc453349 51 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
ninoderkinderen 0:8d87bc453349 52 */
ninoderkinderen 0:8d87bc453349 53
ninoderkinderen 0:8d87bc453349 54 #include "lwip/opt.h"
ninoderkinderen 0:8d87bc453349 55
ninoderkinderen 0:8d87bc453349 56 #if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
ninoderkinderen 0:8d87bc453349 57
ninoderkinderen 0:8d87bc453349 58 #include "ppp.h"
ninoderkinderen 0:8d87bc453349 59 #include "pppdebug.h"
ninoderkinderen 0:8d87bc453349 60
ninoderkinderen 0:8d87bc453349 61 #include "auth.h"
ninoderkinderen 0:8d87bc453349 62 #include "fsm.h"
ninoderkinderen 0:8d87bc453349 63 #include "vj.h"
ninoderkinderen 0:8d87bc453349 64 #include "ipcp.h"
ninoderkinderen 0:8d87bc453349 65
ninoderkinderen 0:8d87bc453349 66 #include "lwip/inet.h"
ninoderkinderen 0:8d87bc453349 67
ninoderkinderen 0:8d87bc453349 68 #include <string.h>
ninoderkinderen 0:8d87bc453349 69
ninoderkinderen 0:8d87bc453349 70 /* #define OLD_CI_ADDRS 1 */ /* Support deprecated address negotiation. */
ninoderkinderen 0:8d87bc453349 71
ninoderkinderen 0:8d87bc453349 72 /* global vars */
ninoderkinderen 0:8d87bc453349 73 ipcp_options ipcp_wantoptions[NUM_PPP]; /* Options that we want to request */
ninoderkinderen 0:8d87bc453349 74 ipcp_options ipcp_gotoptions[NUM_PPP]; /* Options that peer ack'd */
ninoderkinderen 0:8d87bc453349 75 ipcp_options ipcp_allowoptions[NUM_PPP]; /* Options we allow peer to request */
ninoderkinderen 0:8d87bc453349 76 ipcp_options ipcp_hisoptions[NUM_PPP]; /* Options that we ack'd */
ninoderkinderen 0:8d87bc453349 77
ninoderkinderen 0:8d87bc453349 78 /* local vars */
ninoderkinderen 0:8d87bc453349 79 static int default_route_set[NUM_PPP]; /* Have set up a default route */
ninoderkinderen 0:8d87bc453349 80 static int cis_received[NUM_PPP]; /* # Conf-Reqs received */
ninoderkinderen 0:8d87bc453349 81
ninoderkinderen 0:8d87bc453349 82
ninoderkinderen 0:8d87bc453349 83 /*
ninoderkinderen 0:8d87bc453349 84 * Callbacks for fsm code. (CI = Configuration Information)
ninoderkinderen 0:8d87bc453349 85 */
ninoderkinderen 0:8d87bc453349 86 static void ipcp_resetci (fsm *); /* Reset our CI */
ninoderkinderen 0:8d87bc453349 87 static int ipcp_cilen (fsm *); /* Return length of our CI */
ninoderkinderen 0:8d87bc453349 88 static void ipcp_addci (fsm *, u_char *, int *); /* Add our CI */
ninoderkinderen 0:8d87bc453349 89 static int ipcp_ackci (fsm *, u_char *, int); /* Peer ack'd our CI */
ninoderkinderen 0:8d87bc453349 90 static int ipcp_nakci (fsm *, u_char *, int); /* Peer nak'd our CI */
ninoderkinderen 0:8d87bc453349 91 static int ipcp_rejci (fsm *, u_char *, int); /* Peer rej'd our CI */
ninoderkinderen 0:8d87bc453349 92 static int ipcp_reqci (fsm *, u_char *, int *, int); /* Rcv CI */
ninoderkinderen 0:8d87bc453349 93 static void ipcp_up (fsm *); /* We're UP */
ninoderkinderen 0:8d87bc453349 94 static void ipcp_down (fsm *); /* We're DOWN */
ninoderkinderen 0:8d87bc453349 95 #if PPP_ADDITIONAL_CALLBACKS
ninoderkinderen 0:8d87bc453349 96 static void ipcp_script (fsm *, char *); /* Run an up/down script */
ninoderkinderen 0:8d87bc453349 97 #endif
ninoderkinderen 0:8d87bc453349 98 static void ipcp_finished (fsm *); /* Don't need lower layer */
ninoderkinderen 0:8d87bc453349 99
ninoderkinderen 0:8d87bc453349 100
ninoderkinderen 0:8d87bc453349 101 fsm ipcp_fsm[NUM_PPP]; /* IPCP fsm structure */
ninoderkinderen 0:8d87bc453349 102
ninoderkinderen 0:8d87bc453349 103
ninoderkinderen 0:8d87bc453349 104 static fsm_callbacks ipcp_callbacks = { /* IPCP callback routines */
ninoderkinderen 0:8d87bc453349 105 ipcp_resetci, /* Reset our Configuration Information */
ninoderkinderen 0:8d87bc453349 106 ipcp_cilen, /* Length of our Configuration Information */
ninoderkinderen 0:8d87bc453349 107 ipcp_addci, /* Add our Configuration Information */
ninoderkinderen 0:8d87bc453349 108 ipcp_ackci, /* ACK our Configuration Information */
ninoderkinderen 0:8d87bc453349 109 ipcp_nakci, /* NAK our Configuration Information */
ninoderkinderen 0:8d87bc453349 110 ipcp_rejci, /* Reject our Configuration Information */
ninoderkinderen 0:8d87bc453349 111 ipcp_reqci, /* Request peer's Configuration Information */
ninoderkinderen 0:8d87bc453349 112 ipcp_up, /* Called when fsm reaches LS_OPENED state */
ninoderkinderen 0:8d87bc453349 113 ipcp_down, /* Called when fsm leaves LS_OPENED state */
ninoderkinderen 0:8d87bc453349 114 NULL, /* Called when we want the lower layer up */
ninoderkinderen 0:8d87bc453349 115 ipcp_finished, /* Called when we want the lower layer down */
ninoderkinderen 0:8d87bc453349 116 NULL, /* Called when Protocol-Reject received */
ninoderkinderen 0:8d87bc453349 117 NULL, /* Retransmission is necessary */
ninoderkinderen 0:8d87bc453349 118 NULL, /* Called to handle protocol-specific codes */
ninoderkinderen 0:8d87bc453349 119 "IPCP" /* String name of protocol */
ninoderkinderen 0:8d87bc453349 120 };
ninoderkinderen 0:8d87bc453349 121
ninoderkinderen 0:8d87bc453349 122 /*
ninoderkinderen 0:8d87bc453349 123 * Protocol entry points from main code.
ninoderkinderen 0:8d87bc453349 124 */
ninoderkinderen 0:8d87bc453349 125 static void ipcp_init (int);
ninoderkinderen 0:8d87bc453349 126 static void ipcp_open (int);
ninoderkinderen 0:8d87bc453349 127 static void ipcp_close (int, char *);
ninoderkinderen 0:8d87bc453349 128 static void ipcp_lowerup (int);
ninoderkinderen 0:8d87bc453349 129 static void ipcp_lowerdown (int);
ninoderkinderen 0:8d87bc453349 130 static void ipcp_input (int, u_char *, int);
ninoderkinderen 0:8d87bc453349 131 static void ipcp_protrej (int);
ninoderkinderen 0:8d87bc453349 132
ninoderkinderen 0:8d87bc453349 133
ninoderkinderen 0:8d87bc453349 134 struct protent ipcp_protent = {
ninoderkinderen 0:8d87bc453349 135 PPP_IPCP,
ninoderkinderen 0:8d87bc453349 136 ipcp_init,
ninoderkinderen 0:8d87bc453349 137 ipcp_input,
ninoderkinderen 0:8d87bc453349 138 ipcp_protrej,
ninoderkinderen 0:8d87bc453349 139 ipcp_lowerup,
ninoderkinderen 0:8d87bc453349 140 ipcp_lowerdown,
ninoderkinderen 0:8d87bc453349 141 ipcp_open,
ninoderkinderen 0:8d87bc453349 142 ipcp_close,
ninoderkinderen 0:8d87bc453349 143 #if PPP_ADDITIONAL_CALLBACKS
ninoderkinderen 0:8d87bc453349 144 ipcp_printpkt,
ninoderkinderen 0:8d87bc453349 145 NULL,
ninoderkinderen 0:8d87bc453349 146 #endif /* PPP_ADDITIONAL_CALLBACKS */
ninoderkinderen 0:8d87bc453349 147 1,
ninoderkinderen 0:8d87bc453349 148 "IPCP",
ninoderkinderen 0:8d87bc453349 149 #if PPP_ADDITIONAL_CALLBACKS
ninoderkinderen 0:8d87bc453349 150 ip_check_options,
ninoderkinderen 0:8d87bc453349 151 NULL,
ninoderkinderen 0:8d87bc453349 152 ip_active_pkt
ninoderkinderen 0:8d87bc453349 153 #endif /* PPP_ADDITIONAL_CALLBACKS */
ninoderkinderen 0:8d87bc453349 154 };
ninoderkinderen 0:8d87bc453349 155
ninoderkinderen 0:8d87bc453349 156 static void ipcp_clear_addrs (int);
ninoderkinderen 0:8d87bc453349 157
ninoderkinderen 0:8d87bc453349 158 /*
ninoderkinderen 0:8d87bc453349 159 * Lengths of configuration options.
ninoderkinderen 0:8d87bc453349 160 */
ninoderkinderen 0:8d87bc453349 161 #define CILEN_VOID 2
ninoderkinderen 0:8d87bc453349 162 #define CILEN_COMPRESS 4 /* min length for compression protocol opt. */
ninoderkinderen 0:8d87bc453349 163 #define CILEN_VJ 6 /* length for RFC1332 Van-Jacobson opt. */
ninoderkinderen 0:8d87bc453349 164 #define CILEN_ADDR 6 /* new-style single address option */
ninoderkinderen 0:8d87bc453349 165 #define CILEN_ADDRS 10 /* old-style dual address option */
ninoderkinderen 0:8d87bc453349 166
ninoderkinderen 0:8d87bc453349 167
ninoderkinderen 0:8d87bc453349 168 #define CODENAME(x) ((x) == CONFACK ? "ACK" : \
ninoderkinderen 0:8d87bc453349 169 (x) == CONFNAK ? "NAK" : "REJ")
ninoderkinderen 0:8d87bc453349 170
ninoderkinderen 0:8d87bc453349 171
ninoderkinderen 0:8d87bc453349 172 /*
ninoderkinderen 0:8d87bc453349 173 * ipcp_init - Initialize IPCP.
ninoderkinderen 0:8d87bc453349 174 */
ninoderkinderen 0:8d87bc453349 175 static void
ninoderkinderen 0:8d87bc453349 176 ipcp_init(int unit)
ninoderkinderen 0:8d87bc453349 177 {
ninoderkinderen 0:8d87bc453349 178 fsm *f = &ipcp_fsm[unit];
ninoderkinderen 0:8d87bc453349 179 ipcp_options *wo = &ipcp_wantoptions[unit];
ninoderkinderen 0:8d87bc453349 180 ipcp_options *ao = &ipcp_allowoptions[unit];
ninoderkinderen 0:8d87bc453349 181
ninoderkinderen 0:8d87bc453349 182 f->unit = unit;
ninoderkinderen 0:8d87bc453349 183 f->protocol = PPP_IPCP;
ninoderkinderen 0:8d87bc453349 184 f->callbacks = &ipcp_callbacks;
ninoderkinderen 0:8d87bc453349 185 fsm_init(&ipcp_fsm[unit]);
ninoderkinderen 0:8d87bc453349 186
ninoderkinderen 0:8d87bc453349 187 memset(wo, 0, sizeof(*wo));
ninoderkinderen 0:8d87bc453349 188 memset(ao, 0, sizeof(*ao));
ninoderkinderen 0:8d87bc453349 189
ninoderkinderen 0:8d87bc453349 190 wo->neg_addr = 1;
ninoderkinderen 0:8d87bc453349 191 wo->ouraddr = 0;
ninoderkinderen 0:8d87bc453349 192 #if VJ_SUPPORT
ninoderkinderen 0:8d87bc453349 193 wo->neg_vj = 1;
ninoderkinderen 0:8d87bc453349 194 #else /* VJ_SUPPORT */
ninoderkinderen 0:8d87bc453349 195 wo->neg_vj = 0;
ninoderkinderen 0:8d87bc453349 196 #endif /* VJ_SUPPORT */
ninoderkinderen 0:8d87bc453349 197 wo->vj_protocol = IPCP_VJ_COMP;
ninoderkinderen 0:8d87bc453349 198 wo->maxslotindex = MAX_SLOTS - 1;
ninoderkinderen 0:8d87bc453349 199 wo->cflag = 0;
ninoderkinderen 0:8d87bc453349 200 wo->default_route = 1;
ninoderkinderen 0:8d87bc453349 201
ninoderkinderen 0:8d87bc453349 202 ao->neg_addr = 1;
ninoderkinderen 0:8d87bc453349 203 #if VJ_SUPPORT
ninoderkinderen 0:8d87bc453349 204 ao->neg_vj = 1;
ninoderkinderen 0:8d87bc453349 205 #else /* VJ_SUPPORT */
ninoderkinderen 0:8d87bc453349 206 ao->neg_vj = 0;
ninoderkinderen 0:8d87bc453349 207 #endif /* VJ_SUPPORT */
ninoderkinderen 0:8d87bc453349 208 ao->maxslotindex = MAX_SLOTS - 1;
ninoderkinderen 0:8d87bc453349 209 ao->cflag = 1;
ninoderkinderen 0:8d87bc453349 210 ao->default_route = 1;
ninoderkinderen 0:8d87bc453349 211 }
ninoderkinderen 0:8d87bc453349 212
ninoderkinderen 0:8d87bc453349 213
ninoderkinderen 0:8d87bc453349 214 /*
ninoderkinderen 0:8d87bc453349 215 * ipcp_open - IPCP is allowed to come up.
ninoderkinderen 0:8d87bc453349 216 */
ninoderkinderen 0:8d87bc453349 217 static void
ninoderkinderen 0:8d87bc453349 218 ipcp_open(int unit)
ninoderkinderen 0:8d87bc453349 219 {
ninoderkinderen 0:8d87bc453349 220 fsm_open(&ipcp_fsm[unit]);
ninoderkinderen 0:8d87bc453349 221 }
ninoderkinderen 0:8d87bc453349 222
ninoderkinderen 0:8d87bc453349 223
ninoderkinderen 0:8d87bc453349 224 /*
ninoderkinderen 0:8d87bc453349 225 * ipcp_close - Take IPCP down.
ninoderkinderen 0:8d87bc453349 226 */
ninoderkinderen 0:8d87bc453349 227 static void
ninoderkinderen 0:8d87bc453349 228 ipcp_close(int unit, char *reason)
ninoderkinderen 0:8d87bc453349 229 {
ninoderkinderen 0:8d87bc453349 230 fsm_close(&ipcp_fsm[unit], reason);
ninoderkinderen 0:8d87bc453349 231 }
ninoderkinderen 0:8d87bc453349 232
ninoderkinderen 0:8d87bc453349 233
ninoderkinderen 0:8d87bc453349 234 /*
ninoderkinderen 0:8d87bc453349 235 * ipcp_lowerup - The lower layer is up.
ninoderkinderen 0:8d87bc453349 236 */
ninoderkinderen 0:8d87bc453349 237 static void
ninoderkinderen 0:8d87bc453349 238 ipcp_lowerup(int unit)
ninoderkinderen 0:8d87bc453349 239 {
ninoderkinderen 0:8d87bc453349 240 fsm_lowerup(&ipcp_fsm[unit]);
ninoderkinderen 0:8d87bc453349 241 }
ninoderkinderen 0:8d87bc453349 242
ninoderkinderen 0:8d87bc453349 243
ninoderkinderen 0:8d87bc453349 244 /*
ninoderkinderen 0:8d87bc453349 245 * ipcp_lowerdown - The lower layer is down.
ninoderkinderen 0:8d87bc453349 246 */
ninoderkinderen 0:8d87bc453349 247 static void
ninoderkinderen 0:8d87bc453349 248 ipcp_lowerdown(int unit)
ninoderkinderen 0:8d87bc453349 249 {
ninoderkinderen 0:8d87bc453349 250 fsm_lowerdown(&ipcp_fsm[unit]);
ninoderkinderen 0:8d87bc453349 251 }
ninoderkinderen 0:8d87bc453349 252
ninoderkinderen 0:8d87bc453349 253
ninoderkinderen 0:8d87bc453349 254 /*
ninoderkinderen 0:8d87bc453349 255 * ipcp_input - Input IPCP packet.
ninoderkinderen 0:8d87bc453349 256 */
ninoderkinderen 0:8d87bc453349 257 static void
ninoderkinderen 0:8d87bc453349 258 ipcp_input(int unit, u_char *p, int len)
ninoderkinderen 0:8d87bc453349 259 {
ninoderkinderen 0:8d87bc453349 260 fsm_input(&ipcp_fsm[unit], p, len);
ninoderkinderen 0:8d87bc453349 261 }
ninoderkinderen 0:8d87bc453349 262
ninoderkinderen 0:8d87bc453349 263
ninoderkinderen 0:8d87bc453349 264 /*
ninoderkinderen 0:8d87bc453349 265 * ipcp_protrej - A Protocol-Reject was received for IPCP.
ninoderkinderen 0:8d87bc453349 266 *
ninoderkinderen 0:8d87bc453349 267 * Pretend the lower layer went down, so we shut up.
ninoderkinderen 0:8d87bc453349 268 */
ninoderkinderen 0:8d87bc453349 269 static void
ninoderkinderen 0:8d87bc453349 270 ipcp_protrej(int unit)
ninoderkinderen 0:8d87bc453349 271 {
ninoderkinderen 0:8d87bc453349 272 fsm_lowerdown(&ipcp_fsm[unit]);
ninoderkinderen 0:8d87bc453349 273 }
ninoderkinderen 0:8d87bc453349 274
ninoderkinderen 0:8d87bc453349 275
ninoderkinderen 0:8d87bc453349 276 /*
ninoderkinderen 0:8d87bc453349 277 * ipcp_resetci - Reset our CI.
ninoderkinderen 0:8d87bc453349 278 */
ninoderkinderen 0:8d87bc453349 279 static void
ninoderkinderen 0:8d87bc453349 280 ipcp_resetci(fsm *f)
ninoderkinderen 0:8d87bc453349 281 {
ninoderkinderen 0:8d87bc453349 282 ipcp_options *wo = &ipcp_wantoptions[f->unit];
ninoderkinderen 0:8d87bc453349 283
ninoderkinderen 0:8d87bc453349 284 wo->req_addr = wo->neg_addr && ipcp_allowoptions[f->unit].neg_addr;
ninoderkinderen 0:8d87bc453349 285 if (wo->ouraddr == 0) {
ninoderkinderen 0:8d87bc453349 286 wo->accept_local = 1;
ninoderkinderen 0:8d87bc453349 287 }
ninoderkinderen 0:8d87bc453349 288 if (wo->hisaddr == 0) {
ninoderkinderen 0:8d87bc453349 289 wo->accept_remote = 1;
ninoderkinderen 0:8d87bc453349 290 }
ninoderkinderen 0:8d87bc453349 291 /* Request DNS addresses from the peer */
ninoderkinderen 0:8d87bc453349 292 wo->req_dns1 = ppp_settings.usepeerdns;
ninoderkinderen 0:8d87bc453349 293 wo->req_dns2 = ppp_settings.usepeerdns;
ninoderkinderen 0:8d87bc453349 294 ipcp_gotoptions[f->unit] = *wo;
ninoderkinderen 0:8d87bc453349 295 cis_received[f->unit] = 0;
ninoderkinderen 0:8d87bc453349 296 }
ninoderkinderen 0:8d87bc453349 297
ninoderkinderen 0:8d87bc453349 298
ninoderkinderen 0:8d87bc453349 299 /*
ninoderkinderen 0:8d87bc453349 300 * ipcp_cilen - Return length of our CI.
ninoderkinderen 0:8d87bc453349 301 */
ninoderkinderen 0:8d87bc453349 302 static int
ninoderkinderen 0:8d87bc453349 303 ipcp_cilen(fsm *f)
ninoderkinderen 0:8d87bc453349 304 {
ninoderkinderen 0:8d87bc453349 305 ipcp_options *go = &ipcp_gotoptions[f->unit];
ninoderkinderen 0:8d87bc453349 306 ipcp_options *wo = &ipcp_wantoptions[f->unit];
ninoderkinderen 0:8d87bc453349 307 ipcp_options *ho = &ipcp_hisoptions[f->unit];
ninoderkinderen 0:8d87bc453349 308
ninoderkinderen 0:8d87bc453349 309 #define LENCIVJ(neg, old) (neg ? (old? CILEN_COMPRESS : CILEN_VJ) : 0)
ninoderkinderen 0:8d87bc453349 310 #define LENCIADDR(neg, old) (neg ? (old? CILEN_ADDRS : CILEN_ADDR) : 0)
ninoderkinderen 0:8d87bc453349 311 #define LENCIDNS(neg) (neg ? (CILEN_ADDR) : 0)
ninoderkinderen 0:8d87bc453349 312
ninoderkinderen 0:8d87bc453349 313 /*
ninoderkinderen 0:8d87bc453349 314 * First see if we want to change our options to the old
ninoderkinderen 0:8d87bc453349 315 * forms because we have received old forms from the peer.
ninoderkinderen 0:8d87bc453349 316 */
ninoderkinderen 0:8d87bc453349 317 if (wo->neg_addr && !go->neg_addr && !go->old_addrs) {
ninoderkinderen 0:8d87bc453349 318 /* use the old style of address negotiation */
ninoderkinderen 0:8d87bc453349 319 go->neg_addr = 1;
ninoderkinderen 0:8d87bc453349 320 go->old_addrs = 1;
ninoderkinderen 0:8d87bc453349 321 }
ninoderkinderen 0:8d87bc453349 322 if (wo->neg_vj && !go->neg_vj && !go->old_vj) {
ninoderkinderen 0:8d87bc453349 323 /* try an older style of VJ negotiation */
ninoderkinderen 0:8d87bc453349 324 if (cis_received[f->unit] == 0) {
ninoderkinderen 0:8d87bc453349 325 /* keep trying the new style until we see some CI from the peer */
ninoderkinderen 0:8d87bc453349 326 go->neg_vj = 1;
ninoderkinderen 0:8d87bc453349 327 } else {
ninoderkinderen 0:8d87bc453349 328 /* use the old style only if the peer did */
ninoderkinderen 0:8d87bc453349 329 if (ho->neg_vj && ho->old_vj) {
ninoderkinderen 0:8d87bc453349 330 go->neg_vj = 1;
ninoderkinderen 0:8d87bc453349 331 go->old_vj = 1;
ninoderkinderen 0:8d87bc453349 332 go->vj_protocol = ho->vj_protocol;
ninoderkinderen 0:8d87bc453349 333 }
ninoderkinderen 0:8d87bc453349 334 }
ninoderkinderen 0:8d87bc453349 335 }
ninoderkinderen 0:8d87bc453349 336
ninoderkinderen 0:8d87bc453349 337 return (LENCIADDR(go->neg_addr, go->old_addrs) +
ninoderkinderen 0:8d87bc453349 338 LENCIVJ(go->neg_vj, go->old_vj) +
ninoderkinderen 0:8d87bc453349 339 LENCIDNS(go->req_dns1) +
ninoderkinderen 0:8d87bc453349 340 LENCIDNS(go->req_dns2));
ninoderkinderen 0:8d87bc453349 341 }
ninoderkinderen 0:8d87bc453349 342
ninoderkinderen 0:8d87bc453349 343
ninoderkinderen 0:8d87bc453349 344 /*
ninoderkinderen 0:8d87bc453349 345 * ipcp_addci - Add our desired CIs to a packet.
ninoderkinderen 0:8d87bc453349 346 */
ninoderkinderen 0:8d87bc453349 347 static void
ninoderkinderen 0:8d87bc453349 348 ipcp_addci(fsm *f, u_char *ucp, int *lenp)
ninoderkinderen 0:8d87bc453349 349 {
ninoderkinderen 0:8d87bc453349 350 ipcp_options *go = &ipcp_gotoptions[f->unit];
ninoderkinderen 0:8d87bc453349 351 int len = *lenp;
ninoderkinderen 0:8d87bc453349 352
ninoderkinderen 0:8d87bc453349 353 #define ADDCIVJ(opt, neg, val, old, maxslotindex, cflag) \
ninoderkinderen 0:8d87bc453349 354 if (neg) { \
ninoderkinderen 0:8d87bc453349 355 int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \
ninoderkinderen 0:8d87bc453349 356 if (len >= vjlen) { \
ninoderkinderen 0:8d87bc453349 357 PUTCHAR(opt, ucp); \
ninoderkinderen 0:8d87bc453349 358 PUTCHAR(vjlen, ucp); \
ninoderkinderen 0:8d87bc453349 359 PUTSHORT(val, ucp); \
ninoderkinderen 0:8d87bc453349 360 if (!old) { \
ninoderkinderen 0:8d87bc453349 361 PUTCHAR(maxslotindex, ucp); \
ninoderkinderen 0:8d87bc453349 362 PUTCHAR(cflag, ucp); \
ninoderkinderen 0:8d87bc453349 363 } \
ninoderkinderen 0:8d87bc453349 364 len -= vjlen; \
ninoderkinderen 0:8d87bc453349 365 } else { \
ninoderkinderen 0:8d87bc453349 366 neg = 0; \
ninoderkinderen 0:8d87bc453349 367 } \
ninoderkinderen 0:8d87bc453349 368 }
ninoderkinderen 0:8d87bc453349 369
ninoderkinderen 0:8d87bc453349 370 #define ADDCIADDR(opt, neg, old, val1, val2) \
ninoderkinderen 0:8d87bc453349 371 if (neg) { \
ninoderkinderen 0:8d87bc453349 372 int addrlen = (old? CILEN_ADDRS: CILEN_ADDR); \
ninoderkinderen 0:8d87bc453349 373 if (len >= addrlen) { \
ninoderkinderen 0:8d87bc453349 374 u32_t l; \
ninoderkinderen 0:8d87bc453349 375 PUTCHAR(opt, ucp); \
ninoderkinderen 0:8d87bc453349 376 PUTCHAR(addrlen, ucp); \
ninoderkinderen 0:8d87bc453349 377 l = ntohl(val1); \
ninoderkinderen 0:8d87bc453349 378 PUTLONG(l, ucp); \
ninoderkinderen 0:8d87bc453349 379 if (old) { \
ninoderkinderen 0:8d87bc453349 380 l = ntohl(val2); \
ninoderkinderen 0:8d87bc453349 381 PUTLONG(l, ucp); \
ninoderkinderen 0:8d87bc453349 382 } \
ninoderkinderen 0:8d87bc453349 383 len -= addrlen; \
ninoderkinderen 0:8d87bc453349 384 } else { \
ninoderkinderen 0:8d87bc453349 385 neg = 0; \
ninoderkinderen 0:8d87bc453349 386 } \
ninoderkinderen 0:8d87bc453349 387 }
ninoderkinderen 0:8d87bc453349 388
ninoderkinderen 0:8d87bc453349 389 #define ADDCIDNS(opt, neg, addr) \
ninoderkinderen 0:8d87bc453349 390 if (neg) { \
ninoderkinderen 0:8d87bc453349 391 if (len >= CILEN_ADDR) { \
ninoderkinderen 0:8d87bc453349 392 u32_t l; \
ninoderkinderen 0:8d87bc453349 393 PUTCHAR(opt, ucp); \
ninoderkinderen 0:8d87bc453349 394 PUTCHAR(CILEN_ADDR, ucp); \
ninoderkinderen 0:8d87bc453349 395 l = ntohl(addr); \
ninoderkinderen 0:8d87bc453349 396 PUTLONG(l, ucp); \
ninoderkinderen 0:8d87bc453349 397 len -= CILEN_ADDR; \
ninoderkinderen 0:8d87bc453349 398 } else { \
ninoderkinderen 0:8d87bc453349 399 neg = 0; \
ninoderkinderen 0:8d87bc453349 400 } \
ninoderkinderen 0:8d87bc453349 401 }
ninoderkinderen 0:8d87bc453349 402
ninoderkinderen 0:8d87bc453349 403 ADDCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), go->neg_addr,
ninoderkinderen 0:8d87bc453349 404 go->old_addrs, go->ouraddr, go->hisaddr);
ninoderkinderen 0:8d87bc453349 405
ninoderkinderen 0:8d87bc453349 406 ADDCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj,
ninoderkinderen 0:8d87bc453349 407 go->maxslotindex, go->cflag);
ninoderkinderen 0:8d87bc453349 408
ninoderkinderen 0:8d87bc453349 409 ADDCIDNS(CI_MS_DNS1, go->req_dns1, go->dnsaddr[0]);
ninoderkinderen 0:8d87bc453349 410
ninoderkinderen 0:8d87bc453349 411 ADDCIDNS(CI_MS_DNS2, go->req_dns2, go->dnsaddr[1]);
ninoderkinderen 0:8d87bc453349 412
ninoderkinderen 0:8d87bc453349 413 *lenp -= len;
ninoderkinderen 0:8d87bc453349 414 }
ninoderkinderen 0:8d87bc453349 415
ninoderkinderen 0:8d87bc453349 416
ninoderkinderen 0:8d87bc453349 417 /*
ninoderkinderen 0:8d87bc453349 418 * ipcp_ackci - Ack our CIs.
ninoderkinderen 0:8d87bc453349 419 *
ninoderkinderen 0:8d87bc453349 420 * Returns:
ninoderkinderen 0:8d87bc453349 421 * 0 - Ack was bad.
ninoderkinderen 0:8d87bc453349 422 * 1 - Ack was good.
ninoderkinderen 0:8d87bc453349 423 */
ninoderkinderen 0:8d87bc453349 424 static int
ninoderkinderen 0:8d87bc453349 425 ipcp_ackci(fsm *f, u_char *p, int len)
ninoderkinderen 0:8d87bc453349 426 {
ninoderkinderen 0:8d87bc453349 427 ipcp_options *go = &ipcp_gotoptions[f->unit];
ninoderkinderen 0:8d87bc453349 428 u_short cilen, citype, cishort;
ninoderkinderen 0:8d87bc453349 429 u32_t cilong;
ninoderkinderen 0:8d87bc453349 430 u_char cimaxslotindex, cicflag;
ninoderkinderen 0:8d87bc453349 431
ninoderkinderen 0:8d87bc453349 432 /*
ninoderkinderen 0:8d87bc453349 433 * CIs must be in exactly the same order that we sent...
ninoderkinderen 0:8d87bc453349 434 * Check packet length and CI length at each step.
ninoderkinderen 0:8d87bc453349 435 * If we find any deviations, then this packet is bad.
ninoderkinderen 0:8d87bc453349 436 */
ninoderkinderen 0:8d87bc453349 437
ninoderkinderen 0:8d87bc453349 438 #define ACKCIVJ(opt, neg, val, old, maxslotindex, cflag) \
ninoderkinderen 0:8d87bc453349 439 if (neg) { \
ninoderkinderen 0:8d87bc453349 440 int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \
ninoderkinderen 0:8d87bc453349 441 if ((len -= vjlen) < 0) { \
ninoderkinderen 0:8d87bc453349 442 goto bad; \
ninoderkinderen 0:8d87bc453349 443 } \
ninoderkinderen 0:8d87bc453349 444 GETCHAR(citype, p); \
ninoderkinderen 0:8d87bc453349 445 GETCHAR(cilen, p); \
ninoderkinderen 0:8d87bc453349 446 if (cilen != vjlen || \
ninoderkinderen 0:8d87bc453349 447 citype != opt) { \
ninoderkinderen 0:8d87bc453349 448 goto bad; \
ninoderkinderen 0:8d87bc453349 449 } \
ninoderkinderen 0:8d87bc453349 450 GETSHORT(cishort, p); \
ninoderkinderen 0:8d87bc453349 451 if (cishort != val) { \
ninoderkinderen 0:8d87bc453349 452 goto bad; \
ninoderkinderen 0:8d87bc453349 453 } \
ninoderkinderen 0:8d87bc453349 454 if (!old) { \
ninoderkinderen 0:8d87bc453349 455 GETCHAR(cimaxslotindex, p); \
ninoderkinderen 0:8d87bc453349 456 if (cimaxslotindex != maxslotindex) { \
ninoderkinderen 0:8d87bc453349 457 goto bad; \
ninoderkinderen 0:8d87bc453349 458 } \
ninoderkinderen 0:8d87bc453349 459 GETCHAR(cicflag, p); \
ninoderkinderen 0:8d87bc453349 460 if (cicflag != cflag) { \
ninoderkinderen 0:8d87bc453349 461 goto bad; \
ninoderkinderen 0:8d87bc453349 462 } \
ninoderkinderen 0:8d87bc453349 463 } \
ninoderkinderen 0:8d87bc453349 464 }
ninoderkinderen 0:8d87bc453349 465
ninoderkinderen 0:8d87bc453349 466 #define ACKCIADDR(opt, neg, old, val1, val2) \
ninoderkinderen 0:8d87bc453349 467 if (neg) { \
ninoderkinderen 0:8d87bc453349 468 int addrlen = (old? CILEN_ADDRS: CILEN_ADDR); \
ninoderkinderen 0:8d87bc453349 469 u32_t l; \
ninoderkinderen 0:8d87bc453349 470 if ((len -= addrlen) < 0) { \
ninoderkinderen 0:8d87bc453349 471 goto bad; \
ninoderkinderen 0:8d87bc453349 472 } \
ninoderkinderen 0:8d87bc453349 473 GETCHAR(citype, p); \
ninoderkinderen 0:8d87bc453349 474 GETCHAR(cilen, p); \
ninoderkinderen 0:8d87bc453349 475 if (cilen != addrlen || \
ninoderkinderen 0:8d87bc453349 476 citype != opt) { \
ninoderkinderen 0:8d87bc453349 477 goto bad; \
ninoderkinderen 0:8d87bc453349 478 } \
ninoderkinderen 0:8d87bc453349 479 GETLONG(l, p); \
ninoderkinderen 0:8d87bc453349 480 cilong = htonl(l); \
ninoderkinderen 0:8d87bc453349 481 if (val1 != cilong) { \
ninoderkinderen 0:8d87bc453349 482 goto bad; \
ninoderkinderen 0:8d87bc453349 483 } \
ninoderkinderen 0:8d87bc453349 484 if (old) { \
ninoderkinderen 0:8d87bc453349 485 GETLONG(l, p); \
ninoderkinderen 0:8d87bc453349 486 cilong = htonl(l); \
ninoderkinderen 0:8d87bc453349 487 if (val2 != cilong) { \
ninoderkinderen 0:8d87bc453349 488 goto bad; \
ninoderkinderen 0:8d87bc453349 489 } \
ninoderkinderen 0:8d87bc453349 490 } \
ninoderkinderen 0:8d87bc453349 491 }
ninoderkinderen 0:8d87bc453349 492
ninoderkinderen 0:8d87bc453349 493 #define ACKCIDNS(opt, neg, addr) \
ninoderkinderen 0:8d87bc453349 494 if (neg) { \
ninoderkinderen 0:8d87bc453349 495 u32_t l; \
ninoderkinderen 0:8d87bc453349 496 if ((len -= CILEN_ADDR) < 0) { \
ninoderkinderen 0:8d87bc453349 497 goto bad; \
ninoderkinderen 0:8d87bc453349 498 } \
ninoderkinderen 0:8d87bc453349 499 GETCHAR(citype, p); \
ninoderkinderen 0:8d87bc453349 500 GETCHAR(cilen, p); \
ninoderkinderen 0:8d87bc453349 501 if (cilen != CILEN_ADDR || \
ninoderkinderen 0:8d87bc453349 502 citype != opt) { \
ninoderkinderen 0:8d87bc453349 503 goto bad; \
ninoderkinderen 0:8d87bc453349 504 } \
ninoderkinderen 0:8d87bc453349 505 GETLONG(l, p); \
ninoderkinderen 0:8d87bc453349 506 cilong = htonl(l); \
ninoderkinderen 0:8d87bc453349 507 if (addr != cilong) { \
ninoderkinderen 0:8d87bc453349 508 goto bad; \
ninoderkinderen 0:8d87bc453349 509 } \
ninoderkinderen 0:8d87bc453349 510 }
ninoderkinderen 0:8d87bc453349 511
ninoderkinderen 0:8d87bc453349 512 ACKCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), go->neg_addr,
ninoderkinderen 0:8d87bc453349 513 go->old_addrs, go->ouraddr, go->hisaddr);
ninoderkinderen 0:8d87bc453349 514
ninoderkinderen 0:8d87bc453349 515 ACKCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj,
ninoderkinderen 0:8d87bc453349 516 go->maxslotindex, go->cflag);
ninoderkinderen 0:8d87bc453349 517
ninoderkinderen 0:8d87bc453349 518 ACKCIDNS(CI_MS_DNS1, go->req_dns1, go->dnsaddr[0]);
ninoderkinderen 0:8d87bc453349 519
ninoderkinderen 0:8d87bc453349 520 ACKCIDNS(CI_MS_DNS2, go->req_dns2, go->dnsaddr[1]);
ninoderkinderen 0:8d87bc453349 521
ninoderkinderen 0:8d87bc453349 522 /*
ninoderkinderen 0:8d87bc453349 523 * If there are any remaining CIs, then this packet is bad.
ninoderkinderen 0:8d87bc453349 524 */
ninoderkinderen 0:8d87bc453349 525 if (len != 0) {
ninoderkinderen 0:8d87bc453349 526 goto bad;
ninoderkinderen 0:8d87bc453349 527 }
ninoderkinderen 0:8d87bc453349 528 return (1);
ninoderkinderen 0:8d87bc453349 529
ninoderkinderen 0:8d87bc453349 530 bad:
ninoderkinderen 0:8d87bc453349 531 IPCPDEBUG(LOG_INFO, ("ipcp_ackci: received bad Ack!\n"));
ninoderkinderen 0:8d87bc453349 532 return (0);
ninoderkinderen 0:8d87bc453349 533 }
ninoderkinderen 0:8d87bc453349 534
ninoderkinderen 0:8d87bc453349 535 /*
ninoderkinderen 0:8d87bc453349 536 * ipcp_nakci - Peer has sent a NAK for some of our CIs.
ninoderkinderen 0:8d87bc453349 537 * This should not modify any state if the Nak is bad
ninoderkinderen 0:8d87bc453349 538 * or if IPCP is in the LS_OPENED state.
ninoderkinderen 0:8d87bc453349 539 *
ninoderkinderen 0:8d87bc453349 540 * Returns:
ninoderkinderen 0:8d87bc453349 541 * 0 - Nak was bad.
ninoderkinderen 0:8d87bc453349 542 * 1 - Nak was good.
ninoderkinderen 0:8d87bc453349 543 */
ninoderkinderen 0:8d87bc453349 544 static int
ninoderkinderen 0:8d87bc453349 545 ipcp_nakci(fsm *f, u_char *p, int len)
ninoderkinderen 0:8d87bc453349 546 {
ninoderkinderen 0:8d87bc453349 547 ipcp_options *go = &ipcp_gotoptions[f->unit];
ninoderkinderen 0:8d87bc453349 548 u_char cimaxslotindex, cicflag;
ninoderkinderen 0:8d87bc453349 549 u_char citype, cilen, *next;
ninoderkinderen 0:8d87bc453349 550 u_short cishort;
ninoderkinderen 0:8d87bc453349 551 u32_t ciaddr1, ciaddr2, l, cidnsaddr;
ninoderkinderen 0:8d87bc453349 552 ipcp_options no; /* options we've seen Naks for */
ninoderkinderen 0:8d87bc453349 553 ipcp_options try; /* options to request next time */
ninoderkinderen 0:8d87bc453349 554
ninoderkinderen 0:8d87bc453349 555 BZERO(&no, sizeof(no));
ninoderkinderen 0:8d87bc453349 556 try = *go;
ninoderkinderen 0:8d87bc453349 557
ninoderkinderen 0:8d87bc453349 558 /*
ninoderkinderen 0:8d87bc453349 559 * Any Nak'd CIs must be in exactly the same order that we sent.
ninoderkinderen 0:8d87bc453349 560 * Check packet length and CI length at each step.
ninoderkinderen 0:8d87bc453349 561 * If we find any deviations, then this packet is bad.
ninoderkinderen 0:8d87bc453349 562 */
ninoderkinderen 0:8d87bc453349 563 #define NAKCIADDR(opt, neg, old, code) \
ninoderkinderen 0:8d87bc453349 564 if (go->neg && \
ninoderkinderen 0:8d87bc453349 565 len >= (cilen = (old? CILEN_ADDRS: CILEN_ADDR)) && \
ninoderkinderen 0:8d87bc453349 566 p[1] == cilen && \
ninoderkinderen 0:8d87bc453349 567 p[0] == opt) { \
ninoderkinderen 0:8d87bc453349 568 len -= cilen; \
ninoderkinderen 0:8d87bc453349 569 INCPTR(2, p); \
ninoderkinderen 0:8d87bc453349 570 GETLONG(l, p); \
ninoderkinderen 0:8d87bc453349 571 ciaddr1 = htonl(l); \
ninoderkinderen 0:8d87bc453349 572 if (old) { \
ninoderkinderen 0:8d87bc453349 573 GETLONG(l, p); \
ninoderkinderen 0:8d87bc453349 574 ciaddr2 = htonl(l); \
ninoderkinderen 0:8d87bc453349 575 no.old_addrs = 1; \
ninoderkinderen 0:8d87bc453349 576 } else { \
ninoderkinderen 0:8d87bc453349 577 ciaddr2 = 0; \
ninoderkinderen 0:8d87bc453349 578 } \
ninoderkinderen 0:8d87bc453349 579 no.neg = 1; \
ninoderkinderen 0:8d87bc453349 580 code \
ninoderkinderen 0:8d87bc453349 581 }
ninoderkinderen 0:8d87bc453349 582
ninoderkinderen 0:8d87bc453349 583 #define NAKCIVJ(opt, neg, code) \
ninoderkinderen 0:8d87bc453349 584 if (go->neg && \
ninoderkinderen 0:8d87bc453349 585 ((cilen = p[1]) == CILEN_COMPRESS || cilen == CILEN_VJ) && \
ninoderkinderen 0:8d87bc453349 586 len >= cilen && \
ninoderkinderen 0:8d87bc453349 587 p[0] == opt) { \
ninoderkinderen 0:8d87bc453349 588 len -= cilen; \
ninoderkinderen 0:8d87bc453349 589 INCPTR(2, p); \
ninoderkinderen 0:8d87bc453349 590 GETSHORT(cishort, p); \
ninoderkinderen 0:8d87bc453349 591 no.neg = 1; \
ninoderkinderen 0:8d87bc453349 592 code \
ninoderkinderen 0:8d87bc453349 593 }
ninoderkinderen 0:8d87bc453349 594
ninoderkinderen 0:8d87bc453349 595 #define NAKCIDNS(opt, neg, code) \
ninoderkinderen 0:8d87bc453349 596 if (go->neg && \
ninoderkinderen 0:8d87bc453349 597 ((cilen = p[1]) == CILEN_ADDR) && \
ninoderkinderen 0:8d87bc453349 598 len >= cilen && \
ninoderkinderen 0:8d87bc453349 599 p[0] == opt) { \
ninoderkinderen 0:8d87bc453349 600 len -= cilen; \
ninoderkinderen 0:8d87bc453349 601 INCPTR(2, p); \
ninoderkinderen 0:8d87bc453349 602 GETLONG(l, p); \
ninoderkinderen 0:8d87bc453349 603 cidnsaddr = htonl(l); \
ninoderkinderen 0:8d87bc453349 604 no.neg = 1; \
ninoderkinderen 0:8d87bc453349 605 code \
ninoderkinderen 0:8d87bc453349 606 }
ninoderkinderen 0:8d87bc453349 607
ninoderkinderen 0:8d87bc453349 608 /*
ninoderkinderen 0:8d87bc453349 609 * Accept the peer's idea of {our,his} address, if different
ninoderkinderen 0:8d87bc453349 610 * from our idea, only if the accept_{local,remote} flag is set.
ninoderkinderen 0:8d87bc453349 611 */
ninoderkinderen 0:8d87bc453349 612 NAKCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), neg_addr, go->old_addrs,
ninoderkinderen 0:8d87bc453349 613 if (go->accept_local && ciaddr1) { /* Do we know our address? */
ninoderkinderen 0:8d87bc453349 614 try.ouraddr = ciaddr1;
ninoderkinderen 0:8d87bc453349 615 IPCPDEBUG(LOG_INFO, ("local IP address %s\n",
ninoderkinderen 0:8d87bc453349 616 inet_ntoa(ciaddr1)));
ninoderkinderen 0:8d87bc453349 617 }
ninoderkinderen 0:8d87bc453349 618 if (go->accept_remote && ciaddr2) { /* Does he know his? */
ninoderkinderen 0:8d87bc453349 619 try.hisaddr = ciaddr2;
ninoderkinderen 0:8d87bc453349 620 IPCPDEBUG(LOG_INFO, ("remote IP address %s\n",
ninoderkinderen 0:8d87bc453349 621 inet_ntoa(ciaddr2)));
ninoderkinderen 0:8d87bc453349 622 }
ninoderkinderen 0:8d87bc453349 623 );
ninoderkinderen 0:8d87bc453349 624
ninoderkinderen 0:8d87bc453349 625 /*
ninoderkinderen 0:8d87bc453349 626 * Accept the peer's value of maxslotindex provided that it
ninoderkinderen 0:8d87bc453349 627 * is less than what we asked for. Turn off slot-ID compression
ninoderkinderen 0:8d87bc453349 628 * if the peer wants. Send old-style compress-type option if
ninoderkinderen 0:8d87bc453349 629 * the peer wants.
ninoderkinderen 0:8d87bc453349 630 */
ninoderkinderen 0:8d87bc453349 631 NAKCIVJ(CI_COMPRESSTYPE, neg_vj,
ninoderkinderen 0:8d87bc453349 632 if (cilen == CILEN_VJ) {
ninoderkinderen 0:8d87bc453349 633 GETCHAR(cimaxslotindex, p);
ninoderkinderen 0:8d87bc453349 634 GETCHAR(cicflag, p);
ninoderkinderen 0:8d87bc453349 635 if (cishort == IPCP_VJ_COMP) {
ninoderkinderen 0:8d87bc453349 636 try.old_vj = 0;
ninoderkinderen 0:8d87bc453349 637 if (cimaxslotindex < go->maxslotindex) {
ninoderkinderen 0:8d87bc453349 638 try.maxslotindex = cimaxslotindex;
ninoderkinderen 0:8d87bc453349 639 }
ninoderkinderen 0:8d87bc453349 640 if (!cicflag) {
ninoderkinderen 0:8d87bc453349 641 try.cflag = 0;
ninoderkinderen 0:8d87bc453349 642 }
ninoderkinderen 0:8d87bc453349 643 } else {
ninoderkinderen 0:8d87bc453349 644 try.neg_vj = 0;
ninoderkinderen 0:8d87bc453349 645 }
ninoderkinderen 0:8d87bc453349 646 } else {
ninoderkinderen 0:8d87bc453349 647 if (cishort == IPCP_VJ_COMP || cishort == IPCP_VJ_COMP_OLD) {
ninoderkinderen 0:8d87bc453349 648 try.old_vj = 1;
ninoderkinderen 0:8d87bc453349 649 try.vj_protocol = cishort;
ninoderkinderen 0:8d87bc453349 650 } else {
ninoderkinderen 0:8d87bc453349 651 try.neg_vj = 0;
ninoderkinderen 0:8d87bc453349 652 }
ninoderkinderen 0:8d87bc453349 653 }
ninoderkinderen 0:8d87bc453349 654 );
ninoderkinderen 0:8d87bc453349 655
ninoderkinderen 0:8d87bc453349 656 NAKCIDNS(CI_MS_DNS1, req_dns1,
ninoderkinderen 0:8d87bc453349 657 try.dnsaddr[0] = cidnsaddr;
ninoderkinderen 0:8d87bc453349 658 IPCPDEBUG(LOG_INFO, ("primary DNS address %s\n", inet_ntoa(cidnsaddr)));
ninoderkinderen 0:8d87bc453349 659 );
ninoderkinderen 0:8d87bc453349 660
ninoderkinderen 0:8d87bc453349 661 NAKCIDNS(CI_MS_DNS2, req_dns2,
ninoderkinderen 0:8d87bc453349 662 try.dnsaddr[1] = cidnsaddr;
ninoderkinderen 0:8d87bc453349 663 IPCPDEBUG(LOG_INFO, ("secondary DNS address %s\n", inet_ntoa(cidnsaddr)));
ninoderkinderen 0:8d87bc453349 664 );
ninoderkinderen 0:8d87bc453349 665
ninoderkinderen 0:8d87bc453349 666 /*
ninoderkinderen 0:8d87bc453349 667 * There may be remaining CIs, if the peer is requesting negotiation
ninoderkinderen 0:8d87bc453349 668 * on an option that we didn't include in our request packet.
ninoderkinderen 0:8d87bc453349 669 * If they want to negotiate about IP addresses, we comply.
ninoderkinderen 0:8d87bc453349 670 * If they want us to ask for compression, we refuse.
ninoderkinderen 0:8d87bc453349 671 */
ninoderkinderen 0:8d87bc453349 672 while (len > CILEN_VOID) {
ninoderkinderen 0:8d87bc453349 673 GETCHAR(citype, p);
ninoderkinderen 0:8d87bc453349 674 GETCHAR(cilen, p);
ninoderkinderen 0:8d87bc453349 675 if( (len -= cilen) < 0 ) {
ninoderkinderen 0:8d87bc453349 676 goto bad;
ninoderkinderen 0:8d87bc453349 677 }
ninoderkinderen 0:8d87bc453349 678 next = p + cilen - 2;
ninoderkinderen 0:8d87bc453349 679
ninoderkinderen 0:8d87bc453349 680 switch (citype) {
ninoderkinderen 0:8d87bc453349 681 case CI_COMPRESSTYPE:
ninoderkinderen 0:8d87bc453349 682 if (go->neg_vj || no.neg_vj ||
ninoderkinderen 0:8d87bc453349 683 (cilen != CILEN_VJ && cilen != CILEN_COMPRESS)) {
ninoderkinderen 0:8d87bc453349 684 goto bad;
ninoderkinderen 0:8d87bc453349 685 }
ninoderkinderen 0:8d87bc453349 686 no.neg_vj = 1;
ninoderkinderen 0:8d87bc453349 687 break;
ninoderkinderen 0:8d87bc453349 688 case CI_ADDRS:
ninoderkinderen 0:8d87bc453349 689 if ((go->neg_addr && go->old_addrs) || no.old_addrs
ninoderkinderen 0:8d87bc453349 690 || cilen != CILEN_ADDRS) {
ninoderkinderen 0:8d87bc453349 691 goto bad;
ninoderkinderen 0:8d87bc453349 692 }
ninoderkinderen 0:8d87bc453349 693 try.neg_addr = 1;
ninoderkinderen 0:8d87bc453349 694 try.old_addrs = 1;
ninoderkinderen 0:8d87bc453349 695 GETLONG(l, p);
ninoderkinderen 0:8d87bc453349 696 ciaddr1 = htonl(l);
ninoderkinderen 0:8d87bc453349 697 if (ciaddr1 && go->accept_local) {
ninoderkinderen 0:8d87bc453349 698 try.ouraddr = ciaddr1;
ninoderkinderen 0:8d87bc453349 699 }
ninoderkinderen 0:8d87bc453349 700 GETLONG(l, p);
ninoderkinderen 0:8d87bc453349 701 ciaddr2 = htonl(l);
ninoderkinderen 0:8d87bc453349 702 if (ciaddr2 && go->accept_remote) {
ninoderkinderen 0:8d87bc453349 703 try.hisaddr = ciaddr2;
ninoderkinderen 0:8d87bc453349 704 }
ninoderkinderen 0:8d87bc453349 705 no.old_addrs = 1;
ninoderkinderen 0:8d87bc453349 706 break;
ninoderkinderen 0:8d87bc453349 707 case CI_ADDR:
ninoderkinderen 0:8d87bc453349 708 if (go->neg_addr || no.neg_addr || cilen != CILEN_ADDR) {
ninoderkinderen 0:8d87bc453349 709 goto bad;
ninoderkinderen 0:8d87bc453349 710 }
ninoderkinderen 0:8d87bc453349 711 try.old_addrs = 0;
ninoderkinderen 0:8d87bc453349 712 GETLONG(l, p);
ninoderkinderen 0:8d87bc453349 713 ciaddr1 = htonl(l);
ninoderkinderen 0:8d87bc453349 714 if (ciaddr1 && go->accept_local) {
ninoderkinderen 0:8d87bc453349 715 try.ouraddr = ciaddr1;
ninoderkinderen 0:8d87bc453349 716 }
ninoderkinderen 0:8d87bc453349 717 if (try.ouraddr != 0) {
ninoderkinderen 0:8d87bc453349 718 try.neg_addr = 1;
ninoderkinderen 0:8d87bc453349 719 }
ninoderkinderen 0:8d87bc453349 720 no.neg_addr = 1;
ninoderkinderen 0:8d87bc453349 721 break;
ninoderkinderen 0:8d87bc453349 722 }
ninoderkinderen 0:8d87bc453349 723 p = next;
ninoderkinderen 0:8d87bc453349 724 }
ninoderkinderen 0:8d87bc453349 725
ninoderkinderen 0:8d87bc453349 726 /* If there is still anything left, this packet is bad. */
ninoderkinderen 0:8d87bc453349 727 if (len != 0) {
ninoderkinderen 0:8d87bc453349 728 goto bad;
ninoderkinderen 0:8d87bc453349 729 }
ninoderkinderen 0:8d87bc453349 730
ninoderkinderen 0:8d87bc453349 731 /*
ninoderkinderen 0:8d87bc453349 732 * OK, the Nak is good. Now we can update state.
ninoderkinderen 0:8d87bc453349 733 */
ninoderkinderen 0:8d87bc453349 734 if (f->state != LS_OPENED) {
ninoderkinderen 0:8d87bc453349 735 *go = try;
ninoderkinderen 0:8d87bc453349 736 }
ninoderkinderen 0:8d87bc453349 737
ninoderkinderen 0:8d87bc453349 738 return 1;
ninoderkinderen 0:8d87bc453349 739
ninoderkinderen 0:8d87bc453349 740 bad:
ninoderkinderen 0:8d87bc453349 741 IPCPDEBUG(LOG_INFO, ("ipcp_nakci: received bad Nak!\n"));
ninoderkinderen 0:8d87bc453349 742 return 0;
ninoderkinderen 0:8d87bc453349 743 }
ninoderkinderen 0:8d87bc453349 744
ninoderkinderen 0:8d87bc453349 745
ninoderkinderen 0:8d87bc453349 746 /*
ninoderkinderen 0:8d87bc453349 747 * ipcp_rejci - Reject some of our CIs.
ninoderkinderen 0:8d87bc453349 748 */
ninoderkinderen 0:8d87bc453349 749 static int
ninoderkinderen 0:8d87bc453349 750 ipcp_rejci(fsm *f, u_char *p, int len)
ninoderkinderen 0:8d87bc453349 751 {
ninoderkinderen 0:8d87bc453349 752 ipcp_options *go = &ipcp_gotoptions[f->unit];
ninoderkinderen 0:8d87bc453349 753 u_char cimaxslotindex, ciflag, cilen;
ninoderkinderen 0:8d87bc453349 754 u_short cishort;
ninoderkinderen 0:8d87bc453349 755 u32_t cilong;
ninoderkinderen 0:8d87bc453349 756 ipcp_options try; /* options to request next time */
ninoderkinderen 0:8d87bc453349 757
ninoderkinderen 0:8d87bc453349 758 try = *go;
ninoderkinderen 0:8d87bc453349 759 /*
ninoderkinderen 0:8d87bc453349 760 * Any Rejected CIs must be in exactly the same order that we sent.
ninoderkinderen 0:8d87bc453349 761 * Check packet length and CI length at each step.
ninoderkinderen 0:8d87bc453349 762 * If we find any deviations, then this packet is bad.
ninoderkinderen 0:8d87bc453349 763 */
ninoderkinderen 0:8d87bc453349 764 #define REJCIADDR(opt, neg, old, val1, val2) \
ninoderkinderen 0:8d87bc453349 765 if (go->neg && \
ninoderkinderen 0:8d87bc453349 766 len >= (cilen = old? CILEN_ADDRS: CILEN_ADDR) && \
ninoderkinderen 0:8d87bc453349 767 p[1] == cilen && \
ninoderkinderen 0:8d87bc453349 768 p[0] == opt) { \
ninoderkinderen 0:8d87bc453349 769 u32_t l; \
ninoderkinderen 0:8d87bc453349 770 len -= cilen; \
ninoderkinderen 0:8d87bc453349 771 INCPTR(2, p); \
ninoderkinderen 0:8d87bc453349 772 GETLONG(l, p); \
ninoderkinderen 0:8d87bc453349 773 cilong = htonl(l); \
ninoderkinderen 0:8d87bc453349 774 /* Check rejected value. */ \
ninoderkinderen 0:8d87bc453349 775 if (cilong != val1) { \
ninoderkinderen 0:8d87bc453349 776 goto bad; \
ninoderkinderen 0:8d87bc453349 777 } \
ninoderkinderen 0:8d87bc453349 778 if (old) { \
ninoderkinderen 0:8d87bc453349 779 GETLONG(l, p); \
ninoderkinderen 0:8d87bc453349 780 cilong = htonl(l); \
ninoderkinderen 0:8d87bc453349 781 /* Check rejected value. */ \
ninoderkinderen 0:8d87bc453349 782 if (cilong != val2) { \
ninoderkinderen 0:8d87bc453349 783 goto bad; \
ninoderkinderen 0:8d87bc453349 784 } \
ninoderkinderen 0:8d87bc453349 785 } \
ninoderkinderen 0:8d87bc453349 786 try.neg = 0; \
ninoderkinderen 0:8d87bc453349 787 }
ninoderkinderen 0:8d87bc453349 788
ninoderkinderen 0:8d87bc453349 789 #define REJCIVJ(opt, neg, val, old, maxslot, cflag) \
ninoderkinderen 0:8d87bc453349 790 if (go->neg && \
ninoderkinderen 0:8d87bc453349 791 p[1] == (old? CILEN_COMPRESS : CILEN_VJ) && \
ninoderkinderen 0:8d87bc453349 792 len >= p[1] && \
ninoderkinderen 0:8d87bc453349 793 p[0] == opt) { \
ninoderkinderen 0:8d87bc453349 794 len -= p[1]; \
ninoderkinderen 0:8d87bc453349 795 INCPTR(2, p); \
ninoderkinderen 0:8d87bc453349 796 GETSHORT(cishort, p); \
ninoderkinderen 0:8d87bc453349 797 /* Check rejected value. */ \
ninoderkinderen 0:8d87bc453349 798 if (cishort != val) { \
ninoderkinderen 0:8d87bc453349 799 goto bad; \
ninoderkinderen 0:8d87bc453349 800 } \
ninoderkinderen 0:8d87bc453349 801 if (!old) { \
ninoderkinderen 0:8d87bc453349 802 GETCHAR(cimaxslotindex, p); \
ninoderkinderen 0:8d87bc453349 803 if (cimaxslotindex != maxslot) { \
ninoderkinderen 0:8d87bc453349 804 goto bad; \
ninoderkinderen 0:8d87bc453349 805 } \
ninoderkinderen 0:8d87bc453349 806 GETCHAR(ciflag, p); \
ninoderkinderen 0:8d87bc453349 807 if (ciflag != cflag) { \
ninoderkinderen 0:8d87bc453349 808 goto bad; \
ninoderkinderen 0:8d87bc453349 809 } \
ninoderkinderen 0:8d87bc453349 810 } \
ninoderkinderen 0:8d87bc453349 811 try.neg = 0; \
ninoderkinderen 0:8d87bc453349 812 }
ninoderkinderen 0:8d87bc453349 813
ninoderkinderen 0:8d87bc453349 814 #define REJCIDNS(opt, neg, dnsaddr) \
ninoderkinderen 0:8d87bc453349 815 if (go->neg && \
ninoderkinderen 0:8d87bc453349 816 ((cilen = p[1]) == CILEN_ADDR) && \
ninoderkinderen 0:8d87bc453349 817 len >= cilen && \
ninoderkinderen 0:8d87bc453349 818 p[0] == opt) { \
ninoderkinderen 0:8d87bc453349 819 u32_t l; \
ninoderkinderen 0:8d87bc453349 820 len -= cilen; \
ninoderkinderen 0:8d87bc453349 821 INCPTR(2, p); \
ninoderkinderen 0:8d87bc453349 822 GETLONG(l, p); \
ninoderkinderen 0:8d87bc453349 823 cilong = htonl(l); \
ninoderkinderen 0:8d87bc453349 824 /* Check rejected value. */ \
ninoderkinderen 0:8d87bc453349 825 if (cilong != dnsaddr) { \
ninoderkinderen 0:8d87bc453349 826 goto bad; \
ninoderkinderen 0:8d87bc453349 827 } \
ninoderkinderen 0:8d87bc453349 828 try.neg = 0; \
ninoderkinderen 0:8d87bc453349 829 }
ninoderkinderen 0:8d87bc453349 830
ninoderkinderen 0:8d87bc453349 831 REJCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), neg_addr,
ninoderkinderen 0:8d87bc453349 832 go->old_addrs, go->ouraddr, go->hisaddr);
ninoderkinderen 0:8d87bc453349 833
ninoderkinderen 0:8d87bc453349 834 REJCIVJ(CI_COMPRESSTYPE, neg_vj, go->vj_protocol, go->old_vj,
ninoderkinderen 0:8d87bc453349 835 go->maxslotindex, go->cflag);
ninoderkinderen 0:8d87bc453349 836
ninoderkinderen 0:8d87bc453349 837 REJCIDNS(CI_MS_DNS1, req_dns1, go->dnsaddr[0]);
ninoderkinderen 0:8d87bc453349 838
ninoderkinderen 0:8d87bc453349 839 REJCIDNS(CI_MS_DNS2, req_dns2, go->dnsaddr[1]);
ninoderkinderen 0:8d87bc453349 840
ninoderkinderen 0:8d87bc453349 841 /*
ninoderkinderen 0:8d87bc453349 842 * If there are any remaining CIs, then this packet is bad.
ninoderkinderen 0:8d87bc453349 843 */
ninoderkinderen 0:8d87bc453349 844 if (len != 0) {
ninoderkinderen 0:8d87bc453349 845 goto bad;
ninoderkinderen 0:8d87bc453349 846 }
ninoderkinderen 0:8d87bc453349 847 /*
ninoderkinderen 0:8d87bc453349 848 * Now we can update state.
ninoderkinderen 0:8d87bc453349 849 */
ninoderkinderen 0:8d87bc453349 850 if (f->state != LS_OPENED) {
ninoderkinderen 0:8d87bc453349 851 *go = try;
ninoderkinderen 0:8d87bc453349 852 }
ninoderkinderen 0:8d87bc453349 853 return 1;
ninoderkinderen 0:8d87bc453349 854
ninoderkinderen 0:8d87bc453349 855 bad:
ninoderkinderen 0:8d87bc453349 856 IPCPDEBUG(LOG_INFO, ("ipcp_rejci: received bad Reject!\n"));
ninoderkinderen 0:8d87bc453349 857 return 0;
ninoderkinderen 0:8d87bc453349 858 }
ninoderkinderen 0:8d87bc453349 859
ninoderkinderen 0:8d87bc453349 860
ninoderkinderen 0:8d87bc453349 861 /*
ninoderkinderen 0:8d87bc453349 862 * ipcp_reqci - Check the peer's requested CIs and send appropriate response.
ninoderkinderen 0:8d87bc453349 863 *
ninoderkinderen 0:8d87bc453349 864 * Returns: CONFACK, CONFNAK or CONFREJ and input packet modified
ninoderkinderen 0:8d87bc453349 865 * appropriately. If reject_if_disagree is non-zero, doesn't return
ninoderkinderen 0:8d87bc453349 866 * CONFNAK; returns CONFREJ if it can't return CONFACK.
ninoderkinderen 0:8d87bc453349 867 */
ninoderkinderen 0:8d87bc453349 868 static int
ninoderkinderen 0:8d87bc453349 869 ipcp_reqci(fsm *f, u_char *inp/* Requested CIs */,int *len/* Length of requested CIs */,int reject_if_disagree)
ninoderkinderen 0:8d87bc453349 870 {
ninoderkinderen 0:8d87bc453349 871 ipcp_options *wo = &ipcp_wantoptions[f->unit];
ninoderkinderen 0:8d87bc453349 872 ipcp_options *ho = &ipcp_hisoptions[f->unit];
ninoderkinderen 0:8d87bc453349 873 ipcp_options *ao = &ipcp_allowoptions[f->unit];
ninoderkinderen 0:8d87bc453349 874 #ifdef OLD_CI_ADDRS
ninoderkinderen 0:8d87bc453349 875 ipcp_options *go = &ipcp_gotoptions[f->unit];
ninoderkinderen 0:8d87bc453349 876 #endif
ninoderkinderen 0:8d87bc453349 877 u_char *cip, *next; /* Pointer to current and next CIs */
ninoderkinderen 0:8d87bc453349 878 u_short cilen, citype; /* Parsed len, type */
ninoderkinderen 0:8d87bc453349 879 u_short cishort; /* Parsed short value */
ninoderkinderen 0:8d87bc453349 880 u32_t tl, ciaddr1; /* Parsed address values */
ninoderkinderen 0:8d87bc453349 881 #ifdef OLD_CI_ADDRS
ninoderkinderen 0:8d87bc453349 882 u32_t ciaddr2; /* Parsed address values */
ninoderkinderen 0:8d87bc453349 883 #endif
ninoderkinderen 0:8d87bc453349 884 int rc = CONFACK; /* Final packet return code */
ninoderkinderen 0:8d87bc453349 885 int orc; /* Individual option return code */
ninoderkinderen 0:8d87bc453349 886 u_char *p; /* Pointer to next char to parse */
ninoderkinderen 0:8d87bc453349 887 u_char *ucp = inp; /* Pointer to current output char */
ninoderkinderen 0:8d87bc453349 888 int l = *len; /* Length left */
ninoderkinderen 0:8d87bc453349 889 u_char maxslotindex, cflag;
ninoderkinderen 0:8d87bc453349 890 int d;
ninoderkinderen 0:8d87bc453349 891
ninoderkinderen 0:8d87bc453349 892 cis_received[f->unit] = 1;
ninoderkinderen 0:8d87bc453349 893
ninoderkinderen 0:8d87bc453349 894 /*
ninoderkinderen 0:8d87bc453349 895 * Reset all his options.
ninoderkinderen 0:8d87bc453349 896 */
ninoderkinderen 0:8d87bc453349 897 BZERO(ho, sizeof(*ho));
ninoderkinderen 0:8d87bc453349 898
ninoderkinderen 0:8d87bc453349 899 /*
ninoderkinderen 0:8d87bc453349 900 * Process all his options.
ninoderkinderen 0:8d87bc453349 901 */
ninoderkinderen 0:8d87bc453349 902 next = inp;
ninoderkinderen 0:8d87bc453349 903 while (l) {
ninoderkinderen 0:8d87bc453349 904 orc = CONFACK; /* Assume success */
ninoderkinderen 0:8d87bc453349 905 cip = p = next; /* Remember begining of CI */
ninoderkinderen 0:8d87bc453349 906 if (l < 2 || /* Not enough data for CI header or */
ninoderkinderen 0:8d87bc453349 907 p[1] < 2 || /* CI length too small or */
ninoderkinderen 0:8d87bc453349 908 p[1] > l) { /* CI length too big? */
ninoderkinderen 0:8d87bc453349 909 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: bad CI length!\n"));
ninoderkinderen 0:8d87bc453349 910 orc = CONFREJ; /* Reject bad CI */
ninoderkinderen 0:8d87bc453349 911 cilen = (u_short)l;/* Reject till end of packet */
ninoderkinderen 0:8d87bc453349 912 l = 0; /* Don't loop again */
ninoderkinderen 0:8d87bc453349 913 goto endswitch;
ninoderkinderen 0:8d87bc453349 914 }
ninoderkinderen 0:8d87bc453349 915 GETCHAR(citype, p); /* Parse CI type */
ninoderkinderen 0:8d87bc453349 916 GETCHAR(cilen, p); /* Parse CI length */
ninoderkinderen 0:8d87bc453349 917 l -= cilen; /* Adjust remaining length */
ninoderkinderen 0:8d87bc453349 918 next += cilen; /* Step to next CI */
ninoderkinderen 0:8d87bc453349 919
ninoderkinderen 0:8d87bc453349 920 switch (citype) { /* Check CI type */
ninoderkinderen 0:8d87bc453349 921 #ifdef OLD_CI_ADDRS /* Need to save space... */
ninoderkinderen 0:8d87bc453349 922 case CI_ADDRS:
ninoderkinderen 0:8d87bc453349 923 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received ADDRS\n"));
ninoderkinderen 0:8d87bc453349 924 if (!ao->neg_addr ||
ninoderkinderen 0:8d87bc453349 925 cilen != CILEN_ADDRS) { /* Check CI length */
ninoderkinderen 0:8d87bc453349 926 orc = CONFREJ; /* Reject CI */
ninoderkinderen 0:8d87bc453349 927 break;
ninoderkinderen 0:8d87bc453349 928 }
ninoderkinderen 0:8d87bc453349 929
ninoderkinderen 0:8d87bc453349 930 /*
ninoderkinderen 0:8d87bc453349 931 * If he has no address, or if we both have his address but
ninoderkinderen 0:8d87bc453349 932 * disagree about it, then NAK it with our idea.
ninoderkinderen 0:8d87bc453349 933 * In particular, if we don't know his address, but he does,
ninoderkinderen 0:8d87bc453349 934 * then accept it.
ninoderkinderen 0:8d87bc453349 935 */
ninoderkinderen 0:8d87bc453349 936 GETLONG(tl, p); /* Parse source address (his) */
ninoderkinderen 0:8d87bc453349 937 ciaddr1 = htonl(tl);
ninoderkinderen 0:8d87bc453349 938 IPCPDEBUG(LOG_INFO, ("his addr %s\n", inet_ntoa(ciaddr1)));
ninoderkinderen 0:8d87bc453349 939 if (ciaddr1 != wo->hisaddr
ninoderkinderen 0:8d87bc453349 940 && (ciaddr1 == 0 || !wo->accept_remote)) {
ninoderkinderen 0:8d87bc453349 941 orc = CONFNAK;
ninoderkinderen 0:8d87bc453349 942 if (!reject_if_disagree) {
ninoderkinderen 0:8d87bc453349 943 DECPTR(sizeof(u32_t), p);
ninoderkinderen 0:8d87bc453349 944 tl = ntohl(wo->hisaddr);
ninoderkinderen 0:8d87bc453349 945 PUTLONG(tl, p);
ninoderkinderen 0:8d87bc453349 946 }
ninoderkinderen 0:8d87bc453349 947 } else if (ciaddr1 == 0 && wo->hisaddr == 0) {
ninoderkinderen 0:8d87bc453349 948 /*
ninoderkinderen 0:8d87bc453349 949 * If neither we nor he knows his address, reject the option.
ninoderkinderen 0:8d87bc453349 950 */
ninoderkinderen 0:8d87bc453349 951 orc = CONFREJ;
ninoderkinderen 0:8d87bc453349 952 wo->req_addr = 0; /* don't NAK with 0.0.0.0 later */
ninoderkinderen 0:8d87bc453349 953 break;
ninoderkinderen 0:8d87bc453349 954 }
ninoderkinderen 0:8d87bc453349 955
ninoderkinderen 0:8d87bc453349 956 /*
ninoderkinderen 0:8d87bc453349 957 * If he doesn't know our address, or if we both have our address
ninoderkinderen 0:8d87bc453349 958 * but disagree about it, then NAK it with our idea.
ninoderkinderen 0:8d87bc453349 959 */
ninoderkinderen 0:8d87bc453349 960 GETLONG(tl, p); /* Parse desination address (ours) */
ninoderkinderen 0:8d87bc453349 961 ciaddr2 = htonl(tl);
ninoderkinderen 0:8d87bc453349 962 IPCPDEBUG(LOG_INFO, ("our addr %s\n", inet_ntoa(ciaddr2)));
ninoderkinderen 0:8d87bc453349 963 if (ciaddr2 != wo->ouraddr) {
ninoderkinderen 0:8d87bc453349 964 if (ciaddr2 == 0 || !wo->accept_local) {
ninoderkinderen 0:8d87bc453349 965 orc = CONFNAK;
ninoderkinderen 0:8d87bc453349 966 if (!reject_if_disagree) {
ninoderkinderen 0:8d87bc453349 967 DECPTR(sizeof(u32_t), p);
ninoderkinderen 0:8d87bc453349 968 tl = ntohl(wo->ouraddr);
ninoderkinderen 0:8d87bc453349 969 PUTLONG(tl, p);
ninoderkinderen 0:8d87bc453349 970 }
ninoderkinderen 0:8d87bc453349 971 } else {
ninoderkinderen 0:8d87bc453349 972 go->ouraddr = ciaddr2; /* accept peer's idea */
ninoderkinderen 0:8d87bc453349 973 }
ninoderkinderen 0:8d87bc453349 974 }
ninoderkinderen 0:8d87bc453349 975
ninoderkinderen 0:8d87bc453349 976 ho->neg_addr = 1;
ninoderkinderen 0:8d87bc453349 977 ho->old_addrs = 1;
ninoderkinderen 0:8d87bc453349 978 ho->hisaddr = ciaddr1;
ninoderkinderen 0:8d87bc453349 979 ho->ouraddr = ciaddr2;
ninoderkinderen 0:8d87bc453349 980 break;
ninoderkinderen 0:8d87bc453349 981 #endif
ninoderkinderen 0:8d87bc453349 982
ninoderkinderen 0:8d87bc453349 983 case CI_ADDR:
ninoderkinderen 0:8d87bc453349 984 if (!ao->neg_addr) {
ninoderkinderen 0:8d87bc453349 985 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR not allowed\n"));
ninoderkinderen 0:8d87bc453349 986 orc = CONFREJ; /* Reject CI */
ninoderkinderen 0:8d87bc453349 987 break;
ninoderkinderen 0:8d87bc453349 988 } else if (cilen != CILEN_ADDR) { /* Check CI length */
ninoderkinderen 0:8d87bc453349 989 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR bad len\n"));
ninoderkinderen 0:8d87bc453349 990 orc = CONFREJ; /* Reject CI */
ninoderkinderen 0:8d87bc453349 991 break;
ninoderkinderen 0:8d87bc453349 992 }
ninoderkinderen 0:8d87bc453349 993
ninoderkinderen 0:8d87bc453349 994 /*
ninoderkinderen 0:8d87bc453349 995 * If he has no address, or if we both have his address but
ninoderkinderen 0:8d87bc453349 996 * disagree about it, then NAK it with our idea.
ninoderkinderen 0:8d87bc453349 997 * In particular, if we don't know his address, but he does,
ninoderkinderen 0:8d87bc453349 998 * then accept it.
ninoderkinderen 0:8d87bc453349 999 */
ninoderkinderen 0:8d87bc453349 1000 GETLONG(tl, p); /* Parse source address (his) */
ninoderkinderen 0:8d87bc453349 1001 ciaddr1 = htonl(tl);
ninoderkinderen 0:8d87bc453349 1002 if (ciaddr1 != wo->hisaddr
ninoderkinderen 0:8d87bc453349 1003 && (ciaddr1 == 0 || !wo->accept_remote)) {
ninoderkinderen 0:8d87bc453349 1004 orc = CONFNAK;
ninoderkinderen 0:8d87bc453349 1005 if (!reject_if_disagree) {
ninoderkinderen 0:8d87bc453349 1006 DECPTR(sizeof(u32_t), p);
ninoderkinderen 0:8d87bc453349 1007 tl = ntohl(wo->hisaddr);
ninoderkinderen 0:8d87bc453349 1008 PUTLONG(tl, p);
ninoderkinderen 0:8d87bc453349 1009 }
ninoderkinderen 0:8d87bc453349 1010 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Nak ADDR %s\n", inet_ntoa(ciaddr1)));
ninoderkinderen 0:8d87bc453349 1011 } else if (ciaddr1 == 0 && wo->hisaddr == 0) {
ninoderkinderen 0:8d87bc453349 1012 /*
ninoderkinderen 0:8d87bc453349 1013 * Don't ACK an address of 0.0.0.0 - reject it instead.
ninoderkinderen 0:8d87bc453349 1014 */
ninoderkinderen 0:8d87bc453349 1015 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR %s\n", inet_ntoa(ciaddr1)));
ninoderkinderen 0:8d87bc453349 1016 orc = CONFREJ;
ninoderkinderen 0:8d87bc453349 1017 wo->req_addr = 0; /* don't NAK with 0.0.0.0 later */
ninoderkinderen 0:8d87bc453349 1018 break;
ninoderkinderen 0:8d87bc453349 1019 }
ninoderkinderen 0:8d87bc453349 1020
ninoderkinderen 0:8d87bc453349 1021 ho->neg_addr = 1;
ninoderkinderen 0:8d87bc453349 1022 ho->hisaddr = ciaddr1;
ninoderkinderen 0:8d87bc453349 1023 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: ADDR %s\n", inet_ntoa(ciaddr1)));
ninoderkinderen 0:8d87bc453349 1024 break;
ninoderkinderen 0:8d87bc453349 1025
ninoderkinderen 0:8d87bc453349 1026 case CI_MS_DNS1:
ninoderkinderen 0:8d87bc453349 1027 case CI_MS_DNS2:
ninoderkinderen 0:8d87bc453349 1028 /* Microsoft primary or secondary DNS request */
ninoderkinderen 0:8d87bc453349 1029 d = citype == CI_MS_DNS2;
ninoderkinderen 0:8d87bc453349 1030
ninoderkinderen 0:8d87bc453349 1031 /* If we do not have a DNS address then we cannot send it */
ninoderkinderen 0:8d87bc453349 1032 if (ao->dnsaddr[d] == 0 ||
ninoderkinderen 0:8d87bc453349 1033 cilen != CILEN_ADDR) { /* Check CI length */
ninoderkinderen 0:8d87bc453349 1034 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting DNS%d Request\n", d+1));
ninoderkinderen 0:8d87bc453349 1035 orc = CONFREJ; /* Reject CI */
ninoderkinderen 0:8d87bc453349 1036 break;
ninoderkinderen 0:8d87bc453349 1037 }
ninoderkinderen 0:8d87bc453349 1038 GETLONG(tl, p);
ninoderkinderen 0:8d87bc453349 1039 if (htonl(tl) != ao->dnsaddr[d]) {
ninoderkinderen 0:8d87bc453349 1040 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking DNS%d Request %s\n",
ninoderkinderen 0:8d87bc453349 1041 d+1, inet_ntoa(tl)));
ninoderkinderen 0:8d87bc453349 1042 DECPTR(sizeof(u32_t), p);
ninoderkinderen 0:8d87bc453349 1043 tl = ntohl(ao->dnsaddr[d]);
ninoderkinderen 0:8d87bc453349 1044 PUTLONG(tl, p);
ninoderkinderen 0:8d87bc453349 1045 orc = CONFNAK;
ninoderkinderen 0:8d87bc453349 1046 }
ninoderkinderen 0:8d87bc453349 1047 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received DNS%d Request\n", d+1));
ninoderkinderen 0:8d87bc453349 1048 break;
ninoderkinderen 0:8d87bc453349 1049
ninoderkinderen 0:8d87bc453349 1050 case CI_MS_WINS1:
ninoderkinderen 0:8d87bc453349 1051 case CI_MS_WINS2:
ninoderkinderen 0:8d87bc453349 1052 /* Microsoft primary or secondary WINS request */
ninoderkinderen 0:8d87bc453349 1053 d = citype == CI_MS_WINS2;
ninoderkinderen 0:8d87bc453349 1054 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received WINS%d Request\n", d+1));
ninoderkinderen 0:8d87bc453349 1055
ninoderkinderen 0:8d87bc453349 1056 /* If we do not have a DNS address then we cannot send it */
ninoderkinderen 0:8d87bc453349 1057 if (ao->winsaddr[d] == 0 ||
ninoderkinderen 0:8d87bc453349 1058 cilen != CILEN_ADDR) { /* Check CI length */
ninoderkinderen 0:8d87bc453349 1059 orc = CONFREJ; /* Reject CI */
ninoderkinderen 0:8d87bc453349 1060 break;
ninoderkinderen 0:8d87bc453349 1061 }
ninoderkinderen 0:8d87bc453349 1062 GETLONG(tl, p);
ninoderkinderen 0:8d87bc453349 1063 if (htonl(tl) != ao->winsaddr[d]) {
ninoderkinderen 0:8d87bc453349 1064 DECPTR(sizeof(u32_t), p);
ninoderkinderen 0:8d87bc453349 1065 tl = ntohl(ao->winsaddr[d]);
ninoderkinderen 0:8d87bc453349 1066 PUTLONG(tl, p);
ninoderkinderen 0:8d87bc453349 1067 orc = CONFNAK;
ninoderkinderen 0:8d87bc453349 1068 }
ninoderkinderen 0:8d87bc453349 1069 break;
ninoderkinderen 0:8d87bc453349 1070
ninoderkinderen 0:8d87bc453349 1071 case CI_COMPRESSTYPE:
ninoderkinderen 0:8d87bc453349 1072 if (!ao->neg_vj) {
ninoderkinderen 0:8d87bc453349 1073 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE not allowed\n"));
ninoderkinderen 0:8d87bc453349 1074 orc = CONFREJ;
ninoderkinderen 0:8d87bc453349 1075 break;
ninoderkinderen 0:8d87bc453349 1076 } else if (cilen != CILEN_VJ && cilen != CILEN_COMPRESS) {
ninoderkinderen 0:8d87bc453349 1077 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE len=%d\n", cilen));
ninoderkinderen 0:8d87bc453349 1078 orc = CONFREJ;
ninoderkinderen 0:8d87bc453349 1079 break;
ninoderkinderen 0:8d87bc453349 1080 }
ninoderkinderen 0:8d87bc453349 1081 GETSHORT(cishort, p);
ninoderkinderen 0:8d87bc453349 1082
ninoderkinderen 0:8d87bc453349 1083 if (!(cishort == IPCP_VJ_COMP ||
ninoderkinderen 0:8d87bc453349 1084 (cishort == IPCP_VJ_COMP_OLD && cilen == CILEN_COMPRESS))) {
ninoderkinderen 0:8d87bc453349 1085 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE %d\n", cishort));
ninoderkinderen 0:8d87bc453349 1086 orc = CONFREJ;
ninoderkinderen 0:8d87bc453349 1087 break;
ninoderkinderen 0:8d87bc453349 1088 }
ninoderkinderen 0:8d87bc453349 1089
ninoderkinderen 0:8d87bc453349 1090 ho->neg_vj = 1;
ninoderkinderen 0:8d87bc453349 1091 ho->vj_protocol = cishort;
ninoderkinderen 0:8d87bc453349 1092 if (cilen == CILEN_VJ) {
ninoderkinderen 0:8d87bc453349 1093 GETCHAR(maxslotindex, p);
ninoderkinderen 0:8d87bc453349 1094 if (maxslotindex > ao->maxslotindex) {
ninoderkinderen 0:8d87bc453349 1095 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking VJ max slot %d\n", maxslotindex));
ninoderkinderen 0:8d87bc453349 1096 orc = CONFNAK;
ninoderkinderen 0:8d87bc453349 1097 if (!reject_if_disagree) {
ninoderkinderen 0:8d87bc453349 1098 DECPTR(1, p);
ninoderkinderen 0:8d87bc453349 1099 PUTCHAR(ao->maxslotindex, p);
ninoderkinderen 0:8d87bc453349 1100 }
ninoderkinderen 0:8d87bc453349 1101 }
ninoderkinderen 0:8d87bc453349 1102 GETCHAR(cflag, p);
ninoderkinderen 0:8d87bc453349 1103 if (cflag && !ao->cflag) {
ninoderkinderen 0:8d87bc453349 1104 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking VJ cflag %d\n", cflag));
ninoderkinderen 0:8d87bc453349 1105 orc = CONFNAK;
ninoderkinderen 0:8d87bc453349 1106 if (!reject_if_disagree) {
ninoderkinderen 0:8d87bc453349 1107 DECPTR(1, p);
ninoderkinderen 0:8d87bc453349 1108 PUTCHAR(wo->cflag, p);
ninoderkinderen 0:8d87bc453349 1109 }
ninoderkinderen 0:8d87bc453349 1110 }
ninoderkinderen 0:8d87bc453349 1111 ho->maxslotindex = maxslotindex;
ninoderkinderen 0:8d87bc453349 1112 ho->cflag = cflag;
ninoderkinderen 0:8d87bc453349 1113 } else {
ninoderkinderen 0:8d87bc453349 1114 ho->old_vj = 1;
ninoderkinderen 0:8d87bc453349 1115 ho->maxslotindex = MAX_SLOTS - 1;
ninoderkinderen 0:8d87bc453349 1116 ho->cflag = 1;
ninoderkinderen 0:8d87bc453349 1117 }
ninoderkinderen 0:8d87bc453349 1118 IPCPDEBUG(LOG_INFO, (
ninoderkinderen 0:8d87bc453349 1119 "ipcp_reqci: received COMPRESSTYPE p=%d old=%d maxslot=%d cflag=%d\n",
ninoderkinderen 0:8d87bc453349 1120 ho->vj_protocol, ho->old_vj, ho->maxslotindex, ho->cflag));
ninoderkinderen 0:8d87bc453349 1121 break;
ninoderkinderen 0:8d87bc453349 1122
ninoderkinderen 0:8d87bc453349 1123 default:
ninoderkinderen 0:8d87bc453349 1124 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting unknown CI type %d\n", citype));
ninoderkinderen 0:8d87bc453349 1125 orc = CONFREJ;
ninoderkinderen 0:8d87bc453349 1126 break;
ninoderkinderen 0:8d87bc453349 1127 }
ninoderkinderen 0:8d87bc453349 1128
ninoderkinderen 0:8d87bc453349 1129 endswitch:
ninoderkinderen 0:8d87bc453349 1130 if (orc == CONFACK && /* Good CI */
ninoderkinderen 0:8d87bc453349 1131 rc != CONFACK) { /* but prior CI wasnt? */
ninoderkinderen 0:8d87bc453349 1132 continue; /* Don't send this one */
ninoderkinderen 0:8d87bc453349 1133 }
ninoderkinderen 0:8d87bc453349 1134
ninoderkinderen 0:8d87bc453349 1135 if (orc == CONFNAK) { /* Nak this CI? */
ninoderkinderen 0:8d87bc453349 1136 if (reject_if_disagree) { /* Getting fed up with sending NAKs? */
ninoderkinderen 0:8d87bc453349 1137 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting too many naks\n"));
ninoderkinderen 0:8d87bc453349 1138 orc = CONFREJ; /* Get tough if so */
ninoderkinderen 0:8d87bc453349 1139 } else {
ninoderkinderen 0:8d87bc453349 1140 if (rc == CONFREJ) { /* Rejecting prior CI? */
ninoderkinderen 0:8d87bc453349 1141 continue; /* Don't send this one */
ninoderkinderen 0:8d87bc453349 1142 }
ninoderkinderen 0:8d87bc453349 1143 if (rc == CONFACK) { /* Ack'd all prior CIs? */
ninoderkinderen 0:8d87bc453349 1144 rc = CONFNAK; /* Not anymore... */
ninoderkinderen 0:8d87bc453349 1145 ucp = inp; /* Backup */
ninoderkinderen 0:8d87bc453349 1146 }
ninoderkinderen 0:8d87bc453349 1147 }
ninoderkinderen 0:8d87bc453349 1148 }
ninoderkinderen 0:8d87bc453349 1149
ninoderkinderen 0:8d87bc453349 1150 if (orc == CONFREJ && /* Reject this CI */
ninoderkinderen 0:8d87bc453349 1151 rc != CONFREJ) { /* but no prior ones? */
ninoderkinderen 0:8d87bc453349 1152 rc = CONFREJ;
ninoderkinderen 0:8d87bc453349 1153 ucp = inp; /* Backup */
ninoderkinderen 0:8d87bc453349 1154 }
ninoderkinderen 0:8d87bc453349 1155
ninoderkinderen 0:8d87bc453349 1156 /* Need to move CI? */
ninoderkinderen 0:8d87bc453349 1157 if (ucp != cip) {
ninoderkinderen 0:8d87bc453349 1158 BCOPY(cip, ucp, cilen); /* Move it */
ninoderkinderen 0:8d87bc453349 1159 }
ninoderkinderen 0:8d87bc453349 1160
ninoderkinderen 0:8d87bc453349 1161 /* Update output pointer */
ninoderkinderen 0:8d87bc453349 1162 INCPTR(cilen, ucp);
ninoderkinderen 0:8d87bc453349 1163 }
ninoderkinderen 0:8d87bc453349 1164
ninoderkinderen 0:8d87bc453349 1165 /*
ninoderkinderen 0:8d87bc453349 1166 * If we aren't rejecting this packet, and we want to negotiate
ninoderkinderen 0:8d87bc453349 1167 * their address, and they didn't send their address, then we
ninoderkinderen 0:8d87bc453349 1168 * send a NAK with a CI_ADDR option appended. We assume the
ninoderkinderen 0:8d87bc453349 1169 * input buffer is long enough that we can append the extra
ninoderkinderen 0:8d87bc453349 1170 * option safely.
ninoderkinderen 0:8d87bc453349 1171 */
ninoderkinderen 0:8d87bc453349 1172 if (rc != CONFREJ && !ho->neg_addr &&
ninoderkinderen 0:8d87bc453349 1173 wo->req_addr && !reject_if_disagree) {
ninoderkinderen 0:8d87bc453349 1174 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Requesting peer address\n"));
ninoderkinderen 0:8d87bc453349 1175 if (rc == CONFACK) {
ninoderkinderen 0:8d87bc453349 1176 rc = CONFNAK;
ninoderkinderen 0:8d87bc453349 1177 ucp = inp; /* reset pointer */
ninoderkinderen 0:8d87bc453349 1178 wo->req_addr = 0; /* don't ask again */
ninoderkinderen 0:8d87bc453349 1179 }
ninoderkinderen 0:8d87bc453349 1180 PUTCHAR(CI_ADDR, ucp);
ninoderkinderen 0:8d87bc453349 1181 PUTCHAR(CILEN_ADDR, ucp);
ninoderkinderen 0:8d87bc453349 1182 tl = ntohl(wo->hisaddr);
ninoderkinderen 0:8d87bc453349 1183 PUTLONG(tl, ucp);
ninoderkinderen 0:8d87bc453349 1184 }
ninoderkinderen 0:8d87bc453349 1185
ninoderkinderen 0:8d87bc453349 1186 *len = (int)(ucp - inp); /* Compute output length */
ninoderkinderen 0:8d87bc453349 1187 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: returning Configure-%s\n", CODENAME(rc)));
ninoderkinderen 0:8d87bc453349 1188 return (rc); /* Return final code */
ninoderkinderen 0:8d87bc453349 1189 }
ninoderkinderen 0:8d87bc453349 1190
ninoderkinderen 0:8d87bc453349 1191
ninoderkinderen 0:8d87bc453349 1192 #if 0
ninoderkinderen 0:8d87bc453349 1193 /*
ninoderkinderen 0:8d87bc453349 1194 * ip_check_options - check that any IP-related options are OK,
ninoderkinderen 0:8d87bc453349 1195 * and assign appropriate defaults.
ninoderkinderen 0:8d87bc453349 1196 */
ninoderkinderen 0:8d87bc453349 1197 static void
ninoderkinderen 0:8d87bc453349 1198 ip_check_options(u_long localAddr)
ninoderkinderen 0:8d87bc453349 1199 {
ninoderkinderen 0:8d87bc453349 1200 ipcp_options *wo = &ipcp_wantoptions[0];
ninoderkinderen 0:8d87bc453349 1201
ninoderkinderen 0:8d87bc453349 1202 /*
ninoderkinderen 0:8d87bc453349 1203 * Load our default IP address but allow the remote host to give us
ninoderkinderen 0:8d87bc453349 1204 * a new address.
ninoderkinderen 0:8d87bc453349 1205 */
ninoderkinderen 0:8d87bc453349 1206 if (wo->ouraddr == 0 && !ppp_settings.disable_defaultip) {
ninoderkinderen 0:8d87bc453349 1207 wo->accept_local = 1; /* don't insist on this default value */
ninoderkinderen 0:8d87bc453349 1208 wo->ouraddr = htonl(localAddr);
ninoderkinderen 0:8d87bc453349 1209 }
ninoderkinderen 0:8d87bc453349 1210 }
ninoderkinderen 0:8d87bc453349 1211 #endif
ninoderkinderen 0:8d87bc453349 1212
ninoderkinderen 0:8d87bc453349 1213
ninoderkinderen 0:8d87bc453349 1214 /*
ninoderkinderen 0:8d87bc453349 1215 * ipcp_up - IPCP has come UP.
ninoderkinderen 0:8d87bc453349 1216 *
ninoderkinderen 0:8d87bc453349 1217 * Configure the IP network interface appropriately and bring it up.
ninoderkinderen 0:8d87bc453349 1218 */
ninoderkinderen 0:8d87bc453349 1219 static void
ninoderkinderen 0:8d87bc453349 1220 ipcp_up(fsm *f)
ninoderkinderen 0:8d87bc453349 1221 {
ninoderkinderen 0:8d87bc453349 1222 u32_t mask;
ninoderkinderen 0:8d87bc453349 1223 ipcp_options *ho = &ipcp_hisoptions[f->unit];
ninoderkinderen 0:8d87bc453349 1224 ipcp_options *go = &ipcp_gotoptions[f->unit];
ninoderkinderen 0:8d87bc453349 1225 ipcp_options *wo = &ipcp_wantoptions[f->unit];
ninoderkinderen 0:8d87bc453349 1226
ninoderkinderen 0:8d87bc453349 1227 np_up(f->unit, PPP_IP);
ninoderkinderen 0:8d87bc453349 1228 IPCPDEBUG(LOG_INFO, ("ipcp: up\n"));
ninoderkinderen 0:8d87bc453349 1229
ninoderkinderen 0:8d87bc453349 1230 /*
ninoderkinderen 0:8d87bc453349 1231 * We must have a non-zero IP address for both ends of the link.
ninoderkinderen 0:8d87bc453349 1232 */
ninoderkinderen 0:8d87bc453349 1233 if (!ho->neg_addr) {
ninoderkinderen 0:8d87bc453349 1234 ho->hisaddr = wo->hisaddr;
ninoderkinderen 0:8d87bc453349 1235 }
ninoderkinderen 0:8d87bc453349 1236 #ifdef __PPP_STRICT_IMPL__ //DG : Kludge for bad 3g providers PPP impl
ninoderkinderen 0:8d87bc453349 1237 if (ho->hisaddr == 0) {
ninoderkinderen 0:8d87bc453349 1238 IPCPDEBUG(LOG_ERR, ("Could not determine remote IP address\n"));
ninoderkinderen 0:8d87bc453349 1239 ipcp_close(f->unit, "Could not determine remote IP address");
ninoderkinderen 0:8d87bc453349 1240 return;
ninoderkinderen 0:8d87bc453349 1241 }
ninoderkinderen 0:8d87bc453349 1242 #endif
ninoderkinderen 0:8d87bc453349 1243 if (go->ouraddr == 0) {
ninoderkinderen 0:8d87bc453349 1244 IPCPDEBUG(LOG_ERR, ("Could not determine local IP address\n"));
ninoderkinderen 0:8d87bc453349 1245 ipcp_close(f->unit, "Could not determine local IP address");
ninoderkinderen 0:8d87bc453349 1246 return;
ninoderkinderen 0:8d87bc453349 1247 }
ninoderkinderen 0:8d87bc453349 1248
ninoderkinderen 0:8d87bc453349 1249 if (ppp_settings.usepeerdns && (go->dnsaddr[0] || go->dnsaddr[1])) {
ninoderkinderen 0:8d87bc453349 1250 /*pppGotDNSAddrs(go->dnsaddr[0], go->dnsaddr[1]);*/
ninoderkinderen 0:8d87bc453349 1251 }
ninoderkinderen 0:8d87bc453349 1252
ninoderkinderen 0:8d87bc453349 1253 /*
ninoderkinderen 0:8d87bc453349 1254 * Check that the peer is allowed to use the IP address it wants.
ninoderkinderen 0:8d87bc453349 1255 */
ninoderkinderen 0:8d87bc453349 1256 if (!auth_ip_addr(f->unit, ho->hisaddr)) {
ninoderkinderen 0:8d87bc453349 1257 IPCPDEBUG(LOG_ERR, ("Peer is not authorized to use remote address %s\n",
ninoderkinderen 0:8d87bc453349 1258 inet_ntoa(ho->hisaddr)));
ninoderkinderen 0:8d87bc453349 1259 ipcp_close(f->unit, "Unauthorized remote IP address");
ninoderkinderen 0:8d87bc453349 1260 return;
ninoderkinderen 0:8d87bc453349 1261 }
ninoderkinderen 0:8d87bc453349 1262
ninoderkinderen 0:8d87bc453349 1263 /* set tcp compression */
ninoderkinderen 0:8d87bc453349 1264 sifvjcomp(f->unit, ho->neg_vj, ho->cflag, ho->maxslotindex);
ninoderkinderen 0:8d87bc453349 1265
ninoderkinderen 0:8d87bc453349 1266 /*
ninoderkinderen 0:8d87bc453349 1267 * Set IP addresses and (if specified) netmask.
ninoderkinderen 0:8d87bc453349 1268 */
ninoderkinderen 0:8d87bc453349 1269 mask = GetMask(go->ouraddr);
ninoderkinderen 0:8d87bc453349 1270
ninoderkinderen 0:8d87bc453349 1271 if (!sifaddr(f->unit, go->ouraddr, ho->hisaddr, mask, go->dnsaddr[0], go->dnsaddr[1])) {
ninoderkinderen 0:8d87bc453349 1272 IPCPDEBUG(LOG_WARNING, ("sifaddr failed\n"));
ninoderkinderen 0:8d87bc453349 1273 ipcp_close(f->unit, "Interface configuration failed");
ninoderkinderen 0:8d87bc453349 1274 return;
ninoderkinderen 0:8d87bc453349 1275 }
ninoderkinderen 0:8d87bc453349 1276
ninoderkinderen 0:8d87bc453349 1277 /* bring the interface up for IP */
ninoderkinderen 0:8d87bc453349 1278 if (!sifup(f->unit)) {
ninoderkinderen 0:8d87bc453349 1279 IPCPDEBUG(LOG_WARNING, ("sifup failed\n"));
ninoderkinderen 0:8d87bc453349 1280 ipcp_close(f->unit, "Interface configuration failed");
ninoderkinderen 0:8d87bc453349 1281 return;
ninoderkinderen 0:8d87bc453349 1282 }
ninoderkinderen 0:8d87bc453349 1283
ninoderkinderen 0:8d87bc453349 1284 sifnpmode(f->unit, PPP_IP, NPMODE_PASS);
ninoderkinderen 0:8d87bc453349 1285
ninoderkinderen 0:8d87bc453349 1286 /* assign a default route through the interface if required */
ninoderkinderen 0:8d87bc453349 1287 if (ipcp_wantoptions[f->unit].default_route) {
ninoderkinderen 0:8d87bc453349 1288 if (sifdefaultroute(f->unit, go->ouraddr, ho->hisaddr)) {
ninoderkinderen 0:8d87bc453349 1289 default_route_set[f->unit] = 1;
ninoderkinderen 0:8d87bc453349 1290 }
ninoderkinderen 0:8d87bc453349 1291 }
ninoderkinderen 0:8d87bc453349 1292
ninoderkinderen 0:8d87bc453349 1293 IPCPDEBUG(LOG_NOTICE, ("local IP address %s\n", inet_ntoa(go->ouraddr)));
ninoderkinderen 0:8d87bc453349 1294 IPCPDEBUG(LOG_NOTICE, ("remote IP address %s\n", inet_ntoa(ho->hisaddr)));
ninoderkinderen 0:8d87bc453349 1295 if (go->dnsaddr[0]) {
ninoderkinderen 0:8d87bc453349 1296 IPCPDEBUG(LOG_NOTICE, ("primary DNS address %s\n", inet_ntoa(go->dnsaddr[0])));
ninoderkinderen 0:8d87bc453349 1297 }
ninoderkinderen 0:8d87bc453349 1298 if (go->dnsaddr[1]) {
ninoderkinderen 0:8d87bc453349 1299 IPCPDEBUG(LOG_NOTICE, ("secondary DNS address %s\n", inet_ntoa(go->dnsaddr[1])));
ninoderkinderen 0:8d87bc453349 1300 }
ninoderkinderen 0:8d87bc453349 1301 }
ninoderkinderen 0:8d87bc453349 1302
ninoderkinderen 0:8d87bc453349 1303
ninoderkinderen 0:8d87bc453349 1304 /*
ninoderkinderen 0:8d87bc453349 1305 * ipcp_down - IPCP has gone DOWN.
ninoderkinderen 0:8d87bc453349 1306 *
ninoderkinderen 0:8d87bc453349 1307 * Take the IP network interface down, clear its addresses
ninoderkinderen 0:8d87bc453349 1308 * and delete routes through it.
ninoderkinderen 0:8d87bc453349 1309 */
ninoderkinderen 0:8d87bc453349 1310 static void
ninoderkinderen 0:8d87bc453349 1311 ipcp_down(fsm *f)
ninoderkinderen 0:8d87bc453349 1312 {
ninoderkinderen 0:8d87bc453349 1313 IPCPDEBUG(LOG_INFO, ("ipcp: down\n"));
ninoderkinderen 0:8d87bc453349 1314 np_down(f->unit, PPP_IP);
ninoderkinderen 0:8d87bc453349 1315 sifvjcomp(f->unit, 0, 0, 0);
ninoderkinderen 0:8d87bc453349 1316
ninoderkinderen 0:8d87bc453349 1317 sifdown(f->unit);
ninoderkinderen 0:8d87bc453349 1318 ipcp_clear_addrs(f->unit);
ninoderkinderen 0:8d87bc453349 1319 }
ninoderkinderen 0:8d87bc453349 1320
ninoderkinderen 0:8d87bc453349 1321
ninoderkinderen 0:8d87bc453349 1322 /*
ninoderkinderen 0:8d87bc453349 1323 * ipcp_clear_addrs() - clear the interface addresses, routes, etc.
ninoderkinderen 0:8d87bc453349 1324 */
ninoderkinderen 0:8d87bc453349 1325 static void
ninoderkinderen 0:8d87bc453349 1326 ipcp_clear_addrs(int unit)
ninoderkinderen 0:8d87bc453349 1327 {
ninoderkinderen 0:8d87bc453349 1328 u32_t ouraddr, hisaddr;
ninoderkinderen 0:8d87bc453349 1329
ninoderkinderen 0:8d87bc453349 1330 ouraddr = ipcp_gotoptions[unit].ouraddr;
ninoderkinderen 0:8d87bc453349 1331 hisaddr = ipcp_hisoptions[unit].hisaddr;
ninoderkinderen 0:8d87bc453349 1332 if (default_route_set[unit]) {
ninoderkinderen 0:8d87bc453349 1333 cifdefaultroute(unit, ouraddr, hisaddr);
ninoderkinderen 0:8d87bc453349 1334 default_route_set[unit] = 0;
ninoderkinderen 0:8d87bc453349 1335 }
ninoderkinderen 0:8d87bc453349 1336 cifaddr(unit, ouraddr, hisaddr);
ninoderkinderen 0:8d87bc453349 1337 }
ninoderkinderen 0:8d87bc453349 1338
ninoderkinderen 0:8d87bc453349 1339
ninoderkinderen 0:8d87bc453349 1340 /*
ninoderkinderen 0:8d87bc453349 1341 * ipcp_finished - possibly shut down the lower layers.
ninoderkinderen 0:8d87bc453349 1342 */
ninoderkinderen 0:8d87bc453349 1343 static void
ninoderkinderen 0:8d87bc453349 1344 ipcp_finished(fsm *f)
ninoderkinderen 0:8d87bc453349 1345 {
ninoderkinderen 0:8d87bc453349 1346 np_finished(f->unit, PPP_IP);
ninoderkinderen 0:8d87bc453349 1347 }
ninoderkinderen 0:8d87bc453349 1348
ninoderkinderen 0:8d87bc453349 1349 #if PPP_ADDITIONAL_CALLBACKS
ninoderkinderen 0:8d87bc453349 1350 static int
ninoderkinderen 0:8d87bc453349 1351 ipcp_printpkt(u_char *p, int plen, void (*printer) (void *, char *, ...), void *arg)
ninoderkinderen 0:8d87bc453349 1352 {
ninoderkinderen 0:8d87bc453349 1353 LWIP_UNUSED_ARG(p);
ninoderkinderen 0:8d87bc453349 1354 LWIP_UNUSED_ARG(plen);
ninoderkinderen 0:8d87bc453349 1355 LWIP_UNUSED_ARG(printer);
ninoderkinderen 0:8d87bc453349 1356 LWIP_UNUSED_ARG(arg);
ninoderkinderen 0:8d87bc453349 1357 return 0;
ninoderkinderen 0:8d87bc453349 1358 }
ninoderkinderen 0:8d87bc453349 1359
ninoderkinderen 0:8d87bc453349 1360 /*
ninoderkinderen 0:8d87bc453349 1361 * ip_active_pkt - see if this IP packet is worth bringing the link up for.
ninoderkinderen 0:8d87bc453349 1362 * We don't bring the link up for IP fragments or for TCP FIN packets
ninoderkinderen 0:8d87bc453349 1363 * with no data.
ninoderkinderen 0:8d87bc453349 1364 */
ninoderkinderen 0:8d87bc453349 1365 #define IP_HDRLEN 20 /* bytes */
ninoderkinderen 0:8d87bc453349 1366 #define IP_OFFMASK 0x1fff
ninoderkinderen 0:8d87bc453349 1367 #define IPPROTO_TCP 6
ninoderkinderen 0:8d87bc453349 1368 #define TCP_HDRLEN 20
ninoderkinderen 0:8d87bc453349 1369 #define TH_FIN 0x01
ninoderkinderen 0:8d87bc453349 1370
ninoderkinderen 0:8d87bc453349 1371 /*
ninoderkinderen 0:8d87bc453349 1372 * We use these macros because the IP header may be at an odd address,
ninoderkinderen 0:8d87bc453349 1373 * and some compilers might use word loads to get th_off or ip_hl.
ninoderkinderen 0:8d87bc453349 1374 */
ninoderkinderen 0:8d87bc453349 1375
ninoderkinderen 0:8d87bc453349 1376 #define net_short(x) (((x)[0] << 8) + (x)[1])
ninoderkinderen 0:8d87bc453349 1377 #define get_iphl(x) (((unsigned char *)(x))[0] & 0xF)
ninoderkinderen 0:8d87bc453349 1378 #define get_ipoff(x) net_short((unsigned char *)(x) + 6)
ninoderkinderen 0:8d87bc453349 1379 #define get_ipproto(x) (((unsigned char *)(x))[9])
ninoderkinderen 0:8d87bc453349 1380 #define get_tcpoff(x) (((unsigned char *)(x))[12] >> 4)
ninoderkinderen 0:8d87bc453349 1381 #define get_tcpflags(x) (((unsigned char *)(x))[13])
ninoderkinderen 0:8d87bc453349 1382
ninoderkinderen 0:8d87bc453349 1383 static int
ninoderkinderen 0:8d87bc453349 1384 ip_active_pkt(u_char *pkt, int len)
ninoderkinderen 0:8d87bc453349 1385 {
ninoderkinderen 0:8d87bc453349 1386 u_char *tcp;
ninoderkinderen 0:8d87bc453349 1387 int hlen;
ninoderkinderen 0:8d87bc453349 1388
ninoderkinderen 0:8d87bc453349 1389 len -= PPP_HDRLEN;
ninoderkinderen 0:8d87bc453349 1390 pkt += PPP_HDRLEN;
ninoderkinderen 0:8d87bc453349 1391 if (len < IP_HDRLEN) {
ninoderkinderen 0:8d87bc453349 1392 return 0;
ninoderkinderen 0:8d87bc453349 1393 }
ninoderkinderen 0:8d87bc453349 1394 if ((get_ipoff(pkt) & IP_OFFMASK) != 0) {
ninoderkinderen 0:8d87bc453349 1395 return 0;
ninoderkinderen 0:8d87bc453349 1396 }
ninoderkinderen 0:8d87bc453349 1397 if (get_ipproto(pkt) != IPPROTO_TCP) {
ninoderkinderen 0:8d87bc453349 1398 return 1;
ninoderkinderen 0:8d87bc453349 1399 }
ninoderkinderen 0:8d87bc453349 1400 hlen = get_iphl(pkt) * 4;
ninoderkinderen 0:8d87bc453349 1401 if (len < hlen + TCP_HDRLEN) {
ninoderkinderen 0:8d87bc453349 1402 return 0;
ninoderkinderen 0:8d87bc453349 1403 }
ninoderkinderen 0:8d87bc453349 1404 tcp = pkt + hlen;
ninoderkinderen 0:8d87bc453349 1405 if ((get_tcpflags(tcp) & TH_FIN) != 0 && len == hlen + get_tcpoff(tcp) * 4) {
ninoderkinderen 0:8d87bc453349 1406 return 0;
ninoderkinderen 0:8d87bc453349 1407 }
ninoderkinderen 0:8d87bc453349 1408 return 1;
ninoderkinderen 0:8d87bc453349 1409 }
ninoderkinderen 0:8d87bc453349 1410 #endif /* PPP_ADDITIONAL_CALLBACKS */
ninoderkinderen 0:8d87bc453349 1411
ninoderkinderen 0:8d87bc453349 1412 #endif /* PPP_SUPPORT */