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Library for Bert van Dam's book "ARM MICROCONTROLLERS" For all chapters with internet.

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NetServices/lwip/netif/ppp/ipcp.c@0:4edb816d21e1, 2015-10-16 (annotated)

Committer:
ICTFBI
Date:
Fri Oct 16 14:28:26 2015 +0000
Revision:
0:4edb816d21e1
Pre-update 16-10-15

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ICTFBI 0:4edb816d21e1 1 /** In contrast to pppd 2.3.1, DNS support has been added, proxy-ARP and
ICTFBI 0:4edb816d21e1 2 dial-on-demand has been stripped. */
ICTFBI 0:4edb816d21e1 3 /*****************************************************************************
ICTFBI 0:4edb816d21e1 4 * ipcp.c - Network PPP IP Control Protocol program file.
ICTFBI 0:4edb816d21e1 5 *
ICTFBI 0:4edb816d21e1 6 * Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
ICTFBI 0:4edb816d21e1 7 * portions Copyright (c) 1997 by Global Election Systems Inc.
ICTFBI 0:4edb816d21e1 8 *
ICTFBI 0:4edb816d21e1 9 * The authors hereby grant permission to use, copy, modify, distribute,
ICTFBI 0:4edb816d21e1 10 * and license this software and its documentation for any purpose, provided
ICTFBI 0:4edb816d21e1 11 * that existing copyright notices are retained in all copies and that this
ICTFBI 0:4edb816d21e1 12 * notice and the following disclaimer are included verbatim in any
ICTFBI 0:4edb816d21e1 13 * distributions. No written agreement, license, or royalty fee is required
ICTFBI 0:4edb816d21e1 14 * for any of the authorized uses.
ICTFBI 0:4edb816d21e1 15 *
ICTFBI 0:4edb816d21e1 16 * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
ICTFBI 0:4edb816d21e1 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
ICTFBI 0:4edb816d21e1 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
ICTFBI 0:4edb816d21e1 19 * IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
ICTFBI 0:4edb816d21e1 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
ICTFBI 0:4edb816d21e1 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
ICTFBI 0:4edb816d21e1 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
ICTFBI 0:4edb816d21e1 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
ICTFBI 0:4edb816d21e1 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
ICTFBI 0:4edb816d21e1 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
ICTFBI 0:4edb816d21e1 26 *
ICTFBI 0:4edb816d21e1 27 ******************************************************************************
ICTFBI 0:4edb816d21e1 28 * REVISION HISTORY
ICTFBI 0:4edb816d21e1 29 *
ICTFBI 0:4edb816d21e1 30 * 03-01-01 Marc Boucher <marc@mbsi.ca>
ICTFBI 0:4edb816d21e1 31 * Ported to lwIP.
ICTFBI 0:4edb816d21e1 32 * 97-12-08 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
ICTFBI 0:4edb816d21e1 33 * Original.
ICTFBI 0:4edb816d21e1 34 *****************************************************************************/
ICTFBI 0:4edb816d21e1 35 /*
ICTFBI 0:4edb816d21e1 36 * ipcp.c - PPP IP Control Protocol.
ICTFBI 0:4edb816d21e1 37 *
ICTFBI 0:4edb816d21e1 38 * Copyright (c) 1989 Carnegie Mellon University.
ICTFBI 0:4edb816d21e1 39 * All rights reserved.
ICTFBI 0:4edb816d21e1 40 *
ICTFBI 0:4edb816d21e1 41 * Redistribution and use in source and binary forms are permitted
ICTFBI 0:4edb816d21e1 42 * provided that the above copyright notice and this paragraph are
ICTFBI 0:4edb816d21e1 43 * duplicated in all such forms and that any documentation,
ICTFBI 0:4edb816d21e1 44 * advertising materials, and other materials related to such
ICTFBI 0:4edb816d21e1 45 * distribution and use acknowledge that the software was developed
ICTFBI 0:4edb816d21e1 46 * by Carnegie Mellon University. The name of the
ICTFBI 0:4edb816d21e1 47 * University may not be used to endorse or promote products derived
ICTFBI 0:4edb816d21e1 48 * from this software without specific prior written permission.
ICTFBI 0:4edb816d21e1 49 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
ICTFBI 0:4edb816d21e1 50 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
ICTFBI 0:4edb816d21e1 51 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
ICTFBI 0:4edb816d21e1 52 */
ICTFBI 0:4edb816d21e1 53
ICTFBI 0:4edb816d21e1 54 #include "lwip/opt.h"
ICTFBI 0:4edb816d21e1 55
ICTFBI 0:4edb816d21e1 56 #if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
ICTFBI 0:4edb816d21e1 57
ICTFBI 0:4edb816d21e1 58 #include "ppp.h"
ICTFBI 0:4edb816d21e1 59 #include "pppdebug.h"
ICTFBI 0:4edb816d21e1 60
ICTFBI 0:4edb816d21e1 61 #include "auth.h"
ICTFBI 0:4edb816d21e1 62 #include "fsm.h"
ICTFBI 0:4edb816d21e1 63 #include "vj.h"
ICTFBI 0:4edb816d21e1 64 #include "ipcp.h"
ICTFBI 0:4edb816d21e1 65
ICTFBI 0:4edb816d21e1 66 #include "lwip/inet.h"
ICTFBI 0:4edb816d21e1 67
ICTFBI 0:4edb816d21e1 68 #include <string.h>
ICTFBI 0:4edb816d21e1 69
ICTFBI 0:4edb816d21e1 70 /* #define OLD_CI_ADDRS 1 */ /* Support deprecated address negotiation. */
ICTFBI 0:4edb816d21e1 71
ICTFBI 0:4edb816d21e1 72 /* global vars */
ICTFBI 0:4edb816d21e1 73 ipcp_options ipcp_wantoptions[NUM_PPP]; /* Options that we want to request */
ICTFBI 0:4edb816d21e1 74 ipcp_options ipcp_gotoptions[NUM_PPP]; /* Options that peer ack'd */
ICTFBI 0:4edb816d21e1 75 ipcp_options ipcp_allowoptions[NUM_PPP]; /* Options we allow peer to request */
ICTFBI 0:4edb816d21e1 76 ipcp_options ipcp_hisoptions[NUM_PPP]; /* Options that we ack'd */
ICTFBI 0:4edb816d21e1 77
ICTFBI 0:4edb816d21e1 78 /* local vars */
ICTFBI 0:4edb816d21e1 79 static int default_route_set[NUM_PPP]; /* Have set up a default route */
ICTFBI 0:4edb816d21e1 80 static int cis_received[NUM_PPP]; /* # Conf-Reqs received */
ICTFBI 0:4edb816d21e1 81
ICTFBI 0:4edb816d21e1 82
ICTFBI 0:4edb816d21e1 83 /*
ICTFBI 0:4edb816d21e1 84 * Callbacks for fsm code. (CI = Configuration Information)
ICTFBI 0:4edb816d21e1 85 */
ICTFBI 0:4edb816d21e1 86 static void ipcp_resetci (fsm *); /* Reset our CI */
ICTFBI 0:4edb816d21e1 87 static int ipcp_cilen (fsm *); /* Return length of our CI */
ICTFBI 0:4edb816d21e1 88 static void ipcp_addci (fsm *, u_char *, int *); /* Add our CI */
ICTFBI 0:4edb816d21e1 89 static int ipcp_ackci (fsm *, u_char *, int); /* Peer ack'd our CI */
ICTFBI 0:4edb816d21e1 90 static int ipcp_nakci (fsm *, u_char *, int); /* Peer nak'd our CI */
ICTFBI 0:4edb816d21e1 91 static int ipcp_rejci (fsm *, u_char *, int); /* Peer rej'd our CI */
ICTFBI 0:4edb816d21e1 92 static int ipcp_reqci (fsm *, u_char *, int *, int); /* Rcv CI */
ICTFBI 0:4edb816d21e1 93 static void ipcp_up (fsm *); /* We're UP */
ICTFBI 0:4edb816d21e1 94 static void ipcp_down (fsm *); /* We're DOWN */
ICTFBI 0:4edb816d21e1 95 #if PPP_ADDITIONAL_CALLBACKS
ICTFBI 0:4edb816d21e1 96 static void ipcp_script (fsm *, char *); /* Run an up/down script */
ICTFBI 0:4edb816d21e1 97 #endif
ICTFBI 0:4edb816d21e1 98 static void ipcp_finished (fsm *); /* Don't need lower layer */
ICTFBI 0:4edb816d21e1 99
ICTFBI 0:4edb816d21e1 100
ICTFBI 0:4edb816d21e1 101 fsm ipcp_fsm[NUM_PPP]; /* IPCP fsm structure */
ICTFBI 0:4edb816d21e1 102
ICTFBI 0:4edb816d21e1 103
ICTFBI 0:4edb816d21e1 104 static fsm_callbacks ipcp_callbacks = { /* IPCP callback routines */
ICTFBI 0:4edb816d21e1 105 ipcp_resetci, /* Reset our Configuration Information */
ICTFBI 0:4edb816d21e1 106 ipcp_cilen, /* Length of our Configuration Information */
ICTFBI 0:4edb816d21e1 107 ipcp_addci, /* Add our Configuration Information */
ICTFBI 0:4edb816d21e1 108 ipcp_ackci, /* ACK our Configuration Information */
ICTFBI 0:4edb816d21e1 109 ipcp_nakci, /* NAK our Configuration Information */
ICTFBI 0:4edb816d21e1 110 ipcp_rejci, /* Reject our Configuration Information */
ICTFBI 0:4edb816d21e1 111 ipcp_reqci, /* Request peer's Configuration Information */
ICTFBI 0:4edb816d21e1 112 ipcp_up, /* Called when fsm reaches LS_OPENED state */
ICTFBI 0:4edb816d21e1 113 ipcp_down, /* Called when fsm leaves LS_OPENED state */
ICTFBI 0:4edb816d21e1 114 NULL, /* Called when we want the lower layer up */
ICTFBI 0:4edb816d21e1 115 ipcp_finished, /* Called when we want the lower layer down */
ICTFBI 0:4edb816d21e1 116 NULL, /* Called when Protocol-Reject received */
ICTFBI 0:4edb816d21e1 117 NULL, /* Retransmission is necessary */
ICTFBI 0:4edb816d21e1 118 NULL, /* Called to handle protocol-specific codes */
ICTFBI 0:4edb816d21e1 119 "IPCP" /* String name of protocol */
ICTFBI 0:4edb816d21e1 120 };
ICTFBI 0:4edb816d21e1 121
ICTFBI 0:4edb816d21e1 122 /*
ICTFBI 0:4edb816d21e1 123 * Protocol entry points from main code.
ICTFBI 0:4edb816d21e1 124 */
ICTFBI 0:4edb816d21e1 125 static void ipcp_init (int);
ICTFBI 0:4edb816d21e1 126 static void ipcp_open (int);
ICTFBI 0:4edb816d21e1 127 static void ipcp_close (int, char *);
ICTFBI 0:4edb816d21e1 128 static void ipcp_lowerup (int);
ICTFBI 0:4edb816d21e1 129 static void ipcp_lowerdown (int);
ICTFBI 0:4edb816d21e1 130 static void ipcp_input (int, u_char *, int);
ICTFBI 0:4edb816d21e1 131 static void ipcp_protrej (int);
ICTFBI 0:4edb816d21e1 132
ICTFBI 0:4edb816d21e1 133
ICTFBI 0:4edb816d21e1 134 struct protent ipcp_protent = {
ICTFBI 0:4edb816d21e1 135 PPP_IPCP,
ICTFBI 0:4edb816d21e1 136 ipcp_init,
ICTFBI 0:4edb816d21e1 137 ipcp_input,
ICTFBI 0:4edb816d21e1 138 ipcp_protrej,
ICTFBI 0:4edb816d21e1 139 ipcp_lowerup,
ICTFBI 0:4edb816d21e1 140 ipcp_lowerdown,
ICTFBI 0:4edb816d21e1 141 ipcp_open,
ICTFBI 0:4edb816d21e1 142 ipcp_close,
ICTFBI 0:4edb816d21e1 143 #if PPP_ADDITIONAL_CALLBACKS
ICTFBI 0:4edb816d21e1 144 ipcp_printpkt,
ICTFBI 0:4edb816d21e1 145 NULL,
ICTFBI 0:4edb816d21e1 146 #endif /* PPP_ADDITIONAL_CALLBACKS */
ICTFBI 0:4edb816d21e1 147 1,
ICTFBI 0:4edb816d21e1 148 "IPCP",
ICTFBI 0:4edb816d21e1 149 #if PPP_ADDITIONAL_CALLBACKS
ICTFBI 0:4edb816d21e1 150 ip_check_options,
ICTFBI 0:4edb816d21e1 151 NULL,
ICTFBI 0:4edb816d21e1 152 ip_active_pkt
ICTFBI 0:4edb816d21e1 153 #endif /* PPP_ADDITIONAL_CALLBACKS */
ICTFBI 0:4edb816d21e1 154 };
ICTFBI 0:4edb816d21e1 155
ICTFBI 0:4edb816d21e1 156 static void ipcp_clear_addrs (int);
ICTFBI 0:4edb816d21e1 157
ICTFBI 0:4edb816d21e1 158 /*
ICTFBI 0:4edb816d21e1 159 * Lengths of configuration options.
ICTFBI 0:4edb816d21e1 160 */
ICTFBI 0:4edb816d21e1 161 #define CILEN_VOID 2
ICTFBI 0:4edb816d21e1 162 #define CILEN_COMPRESS 4 /* min length for compression protocol opt. */
ICTFBI 0:4edb816d21e1 163 #define CILEN_VJ 6 /* length for RFC1332 Van-Jacobson opt. */
ICTFBI 0:4edb816d21e1 164 #define CILEN_ADDR 6 /* new-style single address option */
ICTFBI 0:4edb816d21e1 165 #define CILEN_ADDRS 10 /* old-style dual address option */
ICTFBI 0:4edb816d21e1 166
ICTFBI 0:4edb816d21e1 167
ICTFBI 0:4edb816d21e1 168 #define CODENAME(x) ((x) == CONFACK ? "ACK" : \
ICTFBI 0:4edb816d21e1 169 (x) == CONFNAK ? "NAK" : "REJ")
ICTFBI 0:4edb816d21e1 170
ICTFBI 0:4edb816d21e1 171
ICTFBI 0:4edb816d21e1 172 /*
ICTFBI 0:4edb816d21e1 173 * ipcp_init - Initialize IPCP.
ICTFBI 0:4edb816d21e1 174 */
ICTFBI 0:4edb816d21e1 175 static void
ICTFBI 0:4edb816d21e1 176 ipcp_init(int unit)
ICTFBI 0:4edb816d21e1 177 {
ICTFBI 0:4edb816d21e1 178 fsm *f = &ipcp_fsm[unit];
ICTFBI 0:4edb816d21e1 179 ipcp_options *wo = &ipcp_wantoptions[unit];
ICTFBI 0:4edb816d21e1 180 ipcp_options *ao = &ipcp_allowoptions[unit];
ICTFBI 0:4edb816d21e1 181
ICTFBI 0:4edb816d21e1 182 f->unit = unit;
ICTFBI 0:4edb816d21e1 183 f->protocol = PPP_IPCP;
ICTFBI 0:4edb816d21e1 184 f->callbacks = &ipcp_callbacks;
ICTFBI 0:4edb816d21e1 185 fsm_init(&ipcp_fsm[unit]);
ICTFBI 0:4edb816d21e1 186
ICTFBI 0:4edb816d21e1 187 memset(wo, 0, sizeof(*wo));
ICTFBI 0:4edb816d21e1 188 memset(ao, 0, sizeof(*ao));
ICTFBI 0:4edb816d21e1 189
ICTFBI 0:4edb816d21e1 190 wo->neg_addr = 1;
ICTFBI 0:4edb816d21e1 191 wo->ouraddr = 0;
ICTFBI 0:4edb816d21e1 192 #if VJ_SUPPORT
ICTFBI 0:4edb816d21e1 193 wo->neg_vj = 1;
ICTFBI 0:4edb816d21e1 194 #else /* VJ_SUPPORT */
ICTFBI 0:4edb816d21e1 195 wo->neg_vj = 0;
ICTFBI 0:4edb816d21e1 196 #endif /* VJ_SUPPORT */
ICTFBI 0:4edb816d21e1 197 wo->vj_protocol = IPCP_VJ_COMP;
ICTFBI 0:4edb816d21e1 198 wo->maxslotindex = MAX_SLOTS - 1;
ICTFBI 0:4edb816d21e1 199 wo->cflag = 0;
ICTFBI 0:4edb816d21e1 200 wo->default_route = 1;
ICTFBI 0:4edb816d21e1 201
ICTFBI 0:4edb816d21e1 202 ao->neg_addr = 1;
ICTFBI 0:4edb816d21e1 203 #if VJ_SUPPORT
ICTFBI 0:4edb816d21e1 204 ao->neg_vj = 1;
ICTFBI 0:4edb816d21e1 205 #else /* VJ_SUPPORT */
ICTFBI 0:4edb816d21e1 206 ao->neg_vj = 0;
ICTFBI 0:4edb816d21e1 207 #endif /* VJ_SUPPORT */
ICTFBI 0:4edb816d21e1 208 ao->maxslotindex = MAX_SLOTS - 1;
ICTFBI 0:4edb816d21e1 209 ao->cflag = 1;
ICTFBI 0:4edb816d21e1 210 ao->default_route = 1;
ICTFBI 0:4edb816d21e1 211 }
ICTFBI 0:4edb816d21e1 212
ICTFBI 0:4edb816d21e1 213
ICTFBI 0:4edb816d21e1 214 /*
ICTFBI 0:4edb816d21e1 215 * ipcp_open - IPCP is allowed to come up.
ICTFBI 0:4edb816d21e1 216 */
ICTFBI 0:4edb816d21e1 217 static void
ICTFBI 0:4edb816d21e1 218 ipcp_open(int unit)
ICTFBI 0:4edb816d21e1 219 {
ICTFBI 0:4edb816d21e1 220 fsm_open(&ipcp_fsm[unit]);
ICTFBI 0:4edb816d21e1 221 }
ICTFBI 0:4edb816d21e1 222
ICTFBI 0:4edb816d21e1 223
ICTFBI 0:4edb816d21e1 224 /*
ICTFBI 0:4edb816d21e1 225 * ipcp_close - Take IPCP down.
ICTFBI 0:4edb816d21e1 226 */
ICTFBI 0:4edb816d21e1 227 static void
ICTFBI 0:4edb816d21e1 228 ipcp_close(int unit, char *reason)
ICTFBI 0:4edb816d21e1 229 {
ICTFBI 0:4edb816d21e1 230 fsm_close(&ipcp_fsm[unit], reason);
ICTFBI 0:4edb816d21e1 231 }
ICTFBI 0:4edb816d21e1 232
ICTFBI 0:4edb816d21e1 233
ICTFBI 0:4edb816d21e1 234 /*
ICTFBI 0:4edb816d21e1 235 * ipcp_lowerup - The lower layer is up.
ICTFBI 0:4edb816d21e1 236 */
ICTFBI 0:4edb816d21e1 237 static void
ICTFBI 0:4edb816d21e1 238 ipcp_lowerup(int unit)
ICTFBI 0:4edb816d21e1 239 {
ICTFBI 0:4edb816d21e1 240 fsm_lowerup(&ipcp_fsm[unit]);
ICTFBI 0:4edb816d21e1 241 }
ICTFBI 0:4edb816d21e1 242
ICTFBI 0:4edb816d21e1 243
ICTFBI 0:4edb816d21e1 244 /*
ICTFBI 0:4edb816d21e1 245 * ipcp_lowerdown - The lower layer is down.
ICTFBI 0:4edb816d21e1 246 */
ICTFBI 0:4edb816d21e1 247 static void
ICTFBI 0:4edb816d21e1 248 ipcp_lowerdown(int unit)
ICTFBI 0:4edb816d21e1 249 {
ICTFBI 0:4edb816d21e1 250 fsm_lowerdown(&ipcp_fsm[unit]);
ICTFBI 0:4edb816d21e1 251 }
ICTFBI 0:4edb816d21e1 252
ICTFBI 0:4edb816d21e1 253
ICTFBI 0:4edb816d21e1 254 /*
ICTFBI 0:4edb816d21e1 255 * ipcp_input - Input IPCP packet.
ICTFBI 0:4edb816d21e1 256 */
ICTFBI 0:4edb816d21e1 257 static void
ICTFBI 0:4edb816d21e1 258 ipcp_input(int unit, u_char *p, int len)
ICTFBI 0:4edb816d21e1 259 {
ICTFBI 0:4edb816d21e1 260 fsm_input(&ipcp_fsm[unit], p, len);
ICTFBI 0:4edb816d21e1 261 }
ICTFBI 0:4edb816d21e1 262
ICTFBI 0:4edb816d21e1 263
ICTFBI 0:4edb816d21e1 264 /*
ICTFBI 0:4edb816d21e1 265 * ipcp_protrej - A Protocol-Reject was received for IPCP.
ICTFBI 0:4edb816d21e1 266 *
ICTFBI 0:4edb816d21e1 267 * Pretend the lower layer went down, so we shut up.
ICTFBI 0:4edb816d21e1 268 */
ICTFBI 0:4edb816d21e1 269 static void
ICTFBI 0:4edb816d21e1 270 ipcp_protrej(int unit)
ICTFBI 0:4edb816d21e1 271 {
ICTFBI 0:4edb816d21e1 272 fsm_lowerdown(&ipcp_fsm[unit]);
ICTFBI 0:4edb816d21e1 273 }
ICTFBI 0:4edb816d21e1 274
ICTFBI 0:4edb816d21e1 275
ICTFBI 0:4edb816d21e1 276 /*
ICTFBI 0:4edb816d21e1 277 * ipcp_resetci - Reset our CI.
ICTFBI 0:4edb816d21e1 278 */
ICTFBI 0:4edb816d21e1 279 static void
ICTFBI 0:4edb816d21e1 280 ipcp_resetci(fsm *f)
ICTFBI 0:4edb816d21e1 281 {
ICTFBI 0:4edb816d21e1 282 ipcp_options *wo = &ipcp_wantoptions[f->unit];
ICTFBI 0:4edb816d21e1 283
ICTFBI 0:4edb816d21e1 284 wo->req_addr = wo->neg_addr && ipcp_allowoptions[f->unit].neg_addr;
ICTFBI 0:4edb816d21e1 285 if (wo->ouraddr == 0) {
ICTFBI 0:4edb816d21e1 286 wo->accept_local = 1;
ICTFBI 0:4edb816d21e1 287 }
ICTFBI 0:4edb816d21e1 288 if (wo->hisaddr == 0) {
ICTFBI 0:4edb816d21e1 289 wo->accept_remote = 1;
ICTFBI 0:4edb816d21e1 290 }
ICTFBI 0:4edb816d21e1 291 /* Request DNS addresses from the peer */
ICTFBI 0:4edb816d21e1 292 wo->req_dns1 = ppp_settings.usepeerdns;
ICTFBI 0:4edb816d21e1 293 wo->req_dns2 = ppp_settings.usepeerdns;
ICTFBI 0:4edb816d21e1 294 ipcp_gotoptions[f->unit] = *wo;
ICTFBI 0:4edb816d21e1 295 cis_received[f->unit] = 0;
ICTFBI 0:4edb816d21e1 296 }
ICTFBI 0:4edb816d21e1 297
ICTFBI 0:4edb816d21e1 298
ICTFBI 0:4edb816d21e1 299 /*
ICTFBI 0:4edb816d21e1 300 * ipcp_cilen - Return length of our CI.
ICTFBI 0:4edb816d21e1 301 */
ICTFBI 0:4edb816d21e1 302 static int
ICTFBI 0:4edb816d21e1 303 ipcp_cilen(fsm *f)
ICTFBI 0:4edb816d21e1 304 {
ICTFBI 0:4edb816d21e1 305 ipcp_options *go = &ipcp_gotoptions[f->unit];
ICTFBI 0:4edb816d21e1 306 ipcp_options *wo = &ipcp_wantoptions[f->unit];
ICTFBI 0:4edb816d21e1 307 ipcp_options *ho = &ipcp_hisoptions[f->unit];
ICTFBI 0:4edb816d21e1 308
ICTFBI 0:4edb816d21e1 309 #define LENCIVJ(neg, old) (neg ? (old? CILEN_COMPRESS : CILEN_VJ) : 0)
ICTFBI 0:4edb816d21e1 310 #define LENCIADDR(neg, old) (neg ? (old? CILEN_ADDRS : CILEN_ADDR) : 0)
ICTFBI 0:4edb816d21e1 311 #define LENCIDNS(neg) (neg ? (CILEN_ADDR) : 0)
ICTFBI 0:4edb816d21e1 312
ICTFBI 0:4edb816d21e1 313 /*
ICTFBI 0:4edb816d21e1 314 * First see if we want to change our options to the old
ICTFBI 0:4edb816d21e1 315 * forms because we have received old forms from the peer.
ICTFBI 0:4edb816d21e1 316 */
ICTFBI 0:4edb816d21e1 317 if (wo->neg_addr && !go->neg_addr && !go->old_addrs) {
ICTFBI 0:4edb816d21e1 318 /* use the old style of address negotiation */
ICTFBI 0:4edb816d21e1 319 go->neg_addr = 1;
ICTFBI 0:4edb816d21e1 320 go->old_addrs = 1;
ICTFBI 0:4edb816d21e1 321 }
ICTFBI 0:4edb816d21e1 322 if (wo->neg_vj && !go->neg_vj && !go->old_vj) {
ICTFBI 0:4edb816d21e1 323 /* try an older style of VJ negotiation */
ICTFBI 0:4edb816d21e1 324 if (cis_received[f->unit] == 0) {
ICTFBI 0:4edb816d21e1 325 /* keep trying the new style until we see some CI from the peer */
ICTFBI 0:4edb816d21e1 326 go->neg_vj = 1;
ICTFBI 0:4edb816d21e1 327 } else {
ICTFBI 0:4edb816d21e1 328 /* use the old style only if the peer did */
ICTFBI 0:4edb816d21e1 329 if (ho->neg_vj && ho->old_vj) {
ICTFBI 0:4edb816d21e1 330 go->neg_vj = 1;
ICTFBI 0:4edb816d21e1 331 go->old_vj = 1;
ICTFBI 0:4edb816d21e1 332 go->vj_protocol = ho->vj_protocol;
ICTFBI 0:4edb816d21e1 333 }
ICTFBI 0:4edb816d21e1 334 }
ICTFBI 0:4edb816d21e1 335 }
ICTFBI 0:4edb816d21e1 336
ICTFBI 0:4edb816d21e1 337 return (LENCIADDR(go->neg_addr, go->old_addrs) +
ICTFBI 0:4edb816d21e1 338 LENCIVJ(go->neg_vj, go->old_vj) +
ICTFBI 0:4edb816d21e1 339 LENCIDNS(go->req_dns1) +
ICTFBI 0:4edb816d21e1 340 LENCIDNS(go->req_dns2));
ICTFBI 0:4edb816d21e1 341 }
ICTFBI 0:4edb816d21e1 342
ICTFBI 0:4edb816d21e1 343
ICTFBI 0:4edb816d21e1 344 /*
ICTFBI 0:4edb816d21e1 345 * ipcp_addci - Add our desired CIs to a packet.
ICTFBI 0:4edb816d21e1 346 */
ICTFBI 0:4edb816d21e1 347 static void
ICTFBI 0:4edb816d21e1 348 ipcp_addci(fsm *f, u_char *ucp, int *lenp)
ICTFBI 0:4edb816d21e1 349 {
ICTFBI 0:4edb816d21e1 350 ipcp_options *go = &ipcp_gotoptions[f->unit];
ICTFBI 0:4edb816d21e1 351 int len = *lenp;
ICTFBI 0:4edb816d21e1 352
ICTFBI 0:4edb816d21e1 353 #define ADDCIVJ(opt, neg, val, old, maxslotindex, cflag) \
ICTFBI 0:4edb816d21e1 354 if (neg) { \
ICTFBI 0:4edb816d21e1 355 int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \
ICTFBI 0:4edb816d21e1 356 if (len >= vjlen) { \
ICTFBI 0:4edb816d21e1 357 PUTCHAR(opt, ucp); \
ICTFBI 0:4edb816d21e1 358 PUTCHAR(vjlen, ucp); \
ICTFBI 0:4edb816d21e1 359 PUTSHORT(val, ucp); \
ICTFBI 0:4edb816d21e1 360 if (!old) { \
ICTFBI 0:4edb816d21e1 361 PUTCHAR(maxslotindex, ucp); \
ICTFBI 0:4edb816d21e1 362 PUTCHAR(cflag, ucp); \
ICTFBI 0:4edb816d21e1 363 } \
ICTFBI 0:4edb816d21e1 364 len -= vjlen; \
ICTFBI 0:4edb816d21e1 365 } else { \
ICTFBI 0:4edb816d21e1 366 neg = 0; \
ICTFBI 0:4edb816d21e1 367 } \
ICTFBI 0:4edb816d21e1 368 }
ICTFBI 0:4edb816d21e1 369
ICTFBI 0:4edb816d21e1 370 #define ADDCIADDR(opt, neg, old, val1, val2) \
ICTFBI 0:4edb816d21e1 371 if (neg) { \
ICTFBI 0:4edb816d21e1 372 int addrlen = (old? CILEN_ADDRS: CILEN_ADDR); \
ICTFBI 0:4edb816d21e1 373 if (len >= addrlen) { \
ICTFBI 0:4edb816d21e1 374 u32_t l; \
ICTFBI 0:4edb816d21e1 375 PUTCHAR(opt, ucp); \
ICTFBI 0:4edb816d21e1 376 PUTCHAR(addrlen, ucp); \
ICTFBI 0:4edb816d21e1 377 l = ntohl(val1); \
ICTFBI 0:4edb816d21e1 378 PUTLONG(l, ucp); \
ICTFBI 0:4edb816d21e1 379 if (old) { \
ICTFBI 0:4edb816d21e1 380 l = ntohl(val2); \
ICTFBI 0:4edb816d21e1 381 PUTLONG(l, ucp); \
ICTFBI 0:4edb816d21e1 382 } \
ICTFBI 0:4edb816d21e1 383 len -= addrlen; \
ICTFBI 0:4edb816d21e1 384 } else { \
ICTFBI 0:4edb816d21e1 385 neg = 0; \
ICTFBI 0:4edb816d21e1 386 } \
ICTFBI 0:4edb816d21e1 387 }
ICTFBI 0:4edb816d21e1 388
ICTFBI 0:4edb816d21e1 389 #define ADDCIDNS(opt, neg, addr) \
ICTFBI 0:4edb816d21e1 390 if (neg) { \
ICTFBI 0:4edb816d21e1 391 if (len >= CILEN_ADDR) { \
ICTFBI 0:4edb816d21e1 392 u32_t l; \
ICTFBI 0:4edb816d21e1 393 PUTCHAR(opt, ucp); \
ICTFBI 0:4edb816d21e1 394 PUTCHAR(CILEN_ADDR, ucp); \
ICTFBI 0:4edb816d21e1 395 l = ntohl(addr); \
ICTFBI 0:4edb816d21e1 396 PUTLONG(l, ucp); \
ICTFBI 0:4edb816d21e1 397 len -= CILEN_ADDR; \
ICTFBI 0:4edb816d21e1 398 } else { \
ICTFBI 0:4edb816d21e1 399 neg = 0; \
ICTFBI 0:4edb816d21e1 400 } \
ICTFBI 0:4edb816d21e1 401 }
ICTFBI 0:4edb816d21e1 402
ICTFBI 0:4edb816d21e1 403 ADDCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), go->neg_addr,
ICTFBI 0:4edb816d21e1 404 go->old_addrs, go->ouraddr, go->hisaddr);
ICTFBI 0:4edb816d21e1 405
ICTFBI 0:4edb816d21e1 406 ADDCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj,
ICTFBI 0:4edb816d21e1 407 go->maxslotindex, go->cflag);
ICTFBI 0:4edb816d21e1 408
ICTFBI 0:4edb816d21e1 409 ADDCIDNS(CI_MS_DNS1, go->req_dns1, go->dnsaddr[0]);
ICTFBI 0:4edb816d21e1 410
ICTFBI 0:4edb816d21e1 411 ADDCIDNS(CI_MS_DNS2, go->req_dns2, go->dnsaddr[1]);
ICTFBI 0:4edb816d21e1 412
ICTFBI 0:4edb816d21e1 413 *lenp -= len;
ICTFBI 0:4edb816d21e1 414 }
ICTFBI 0:4edb816d21e1 415
ICTFBI 0:4edb816d21e1 416
ICTFBI 0:4edb816d21e1 417 /*
ICTFBI 0:4edb816d21e1 418 * ipcp_ackci - Ack our CIs.
ICTFBI 0:4edb816d21e1 419 *
ICTFBI 0:4edb816d21e1 420 * Returns:
ICTFBI 0:4edb816d21e1 421 * 0 - Ack was bad.
ICTFBI 0:4edb816d21e1 422 * 1 - Ack was good.
ICTFBI 0:4edb816d21e1 423 */
ICTFBI 0:4edb816d21e1 424 static int
ICTFBI 0:4edb816d21e1 425 ipcp_ackci(fsm *f, u_char *p, int len)
ICTFBI 0:4edb816d21e1 426 {
ICTFBI 0:4edb816d21e1 427 ipcp_options *go = &ipcp_gotoptions[f->unit];
ICTFBI 0:4edb816d21e1 428 u_short cilen, citype, cishort;
ICTFBI 0:4edb816d21e1 429 u32_t cilong;
ICTFBI 0:4edb816d21e1 430 u_char cimaxslotindex, cicflag;
ICTFBI 0:4edb816d21e1 431
ICTFBI 0:4edb816d21e1 432 /*
ICTFBI 0:4edb816d21e1 433 * CIs must be in exactly the same order that we sent...
ICTFBI 0:4edb816d21e1 434 * Check packet length and CI length at each step.
ICTFBI 0:4edb816d21e1 435 * If we find any deviations, then this packet is bad.
ICTFBI 0:4edb816d21e1 436 */
ICTFBI 0:4edb816d21e1 437
ICTFBI 0:4edb816d21e1 438 #define ACKCIVJ(opt, neg, val, old, maxslotindex, cflag) \
ICTFBI 0:4edb816d21e1 439 if (neg) { \
ICTFBI 0:4edb816d21e1 440 int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \
ICTFBI 0:4edb816d21e1 441 if ((len -= vjlen) < 0) { \
ICTFBI 0:4edb816d21e1 442 goto bad; \
ICTFBI 0:4edb816d21e1 443 } \
ICTFBI 0:4edb816d21e1 444 GETCHAR(citype, p); \
ICTFBI 0:4edb816d21e1 445 GETCHAR(cilen, p); \
ICTFBI 0:4edb816d21e1 446 if (cilen != vjlen || \
ICTFBI 0:4edb816d21e1 447 citype != opt) { \
ICTFBI 0:4edb816d21e1 448 goto bad; \
ICTFBI 0:4edb816d21e1 449 } \
ICTFBI 0:4edb816d21e1 450 GETSHORT(cishort, p); \
ICTFBI 0:4edb816d21e1 451 if (cishort != val) { \
ICTFBI 0:4edb816d21e1 452 goto bad; \
ICTFBI 0:4edb816d21e1 453 } \
ICTFBI 0:4edb816d21e1 454 if (!old) { \
ICTFBI 0:4edb816d21e1 455 GETCHAR(cimaxslotindex, p); \
ICTFBI 0:4edb816d21e1 456 if (cimaxslotindex != maxslotindex) { \
ICTFBI 0:4edb816d21e1 457 goto bad; \
ICTFBI 0:4edb816d21e1 458 } \
ICTFBI 0:4edb816d21e1 459 GETCHAR(cicflag, p); \
ICTFBI 0:4edb816d21e1 460 if (cicflag != cflag) { \
ICTFBI 0:4edb816d21e1 461 goto bad; \
ICTFBI 0:4edb816d21e1 462 } \
ICTFBI 0:4edb816d21e1 463 } \
ICTFBI 0:4edb816d21e1 464 }
ICTFBI 0:4edb816d21e1 465
ICTFBI 0:4edb816d21e1 466 #define ACKCIADDR(opt, neg, old, val1, val2) \
ICTFBI 0:4edb816d21e1 467 if (neg) { \
ICTFBI 0:4edb816d21e1 468 int addrlen = (old? CILEN_ADDRS: CILEN_ADDR); \
ICTFBI 0:4edb816d21e1 469 u32_t l; \
ICTFBI 0:4edb816d21e1 470 if ((len -= addrlen) < 0) { \
ICTFBI 0:4edb816d21e1 471 goto bad; \
ICTFBI 0:4edb816d21e1 472 } \
ICTFBI 0:4edb816d21e1 473 GETCHAR(citype, p); \
ICTFBI 0:4edb816d21e1 474 GETCHAR(cilen, p); \
ICTFBI 0:4edb816d21e1 475 if (cilen != addrlen || \
ICTFBI 0:4edb816d21e1 476 citype != opt) { \
ICTFBI 0:4edb816d21e1 477 goto bad; \
ICTFBI 0:4edb816d21e1 478 } \
ICTFBI 0:4edb816d21e1 479 GETLONG(l, p); \
ICTFBI 0:4edb816d21e1 480 cilong = htonl(l); \
ICTFBI 0:4edb816d21e1 481 if (val1 != cilong) { \
ICTFBI 0:4edb816d21e1 482 goto bad; \
ICTFBI 0:4edb816d21e1 483 } \
ICTFBI 0:4edb816d21e1 484 if (old) { \
ICTFBI 0:4edb816d21e1 485 GETLONG(l, p); \
ICTFBI 0:4edb816d21e1 486 cilong = htonl(l); \
ICTFBI 0:4edb816d21e1 487 if (val2 != cilong) { \
ICTFBI 0:4edb816d21e1 488 goto bad; \
ICTFBI 0:4edb816d21e1 489 } \
ICTFBI 0:4edb816d21e1 490 } \
ICTFBI 0:4edb816d21e1 491 }
ICTFBI 0:4edb816d21e1 492
ICTFBI 0:4edb816d21e1 493 #define ACKCIDNS(opt, neg, addr) \
ICTFBI 0:4edb816d21e1 494 if (neg) { \
ICTFBI 0:4edb816d21e1 495 u32_t l; \
ICTFBI 0:4edb816d21e1 496 if ((len -= CILEN_ADDR) < 0) { \
ICTFBI 0:4edb816d21e1 497 goto bad; \
ICTFBI 0:4edb816d21e1 498 } \
ICTFBI 0:4edb816d21e1 499 GETCHAR(citype, p); \
ICTFBI 0:4edb816d21e1 500 GETCHAR(cilen, p); \
ICTFBI 0:4edb816d21e1 501 if (cilen != CILEN_ADDR || \
ICTFBI 0:4edb816d21e1 502 citype != opt) { \
ICTFBI 0:4edb816d21e1 503 goto bad; \
ICTFBI 0:4edb816d21e1 504 } \
ICTFBI 0:4edb816d21e1 505 GETLONG(l, p); \
ICTFBI 0:4edb816d21e1 506 cilong = htonl(l); \
ICTFBI 0:4edb816d21e1 507 if (addr != cilong) { \
ICTFBI 0:4edb816d21e1 508 goto bad; \
ICTFBI 0:4edb816d21e1 509 } \
ICTFBI 0:4edb816d21e1 510 }
ICTFBI 0:4edb816d21e1 511
ICTFBI 0:4edb816d21e1 512 ACKCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), go->neg_addr,
ICTFBI 0:4edb816d21e1 513 go->old_addrs, go->ouraddr, go->hisaddr);
ICTFBI 0:4edb816d21e1 514
ICTFBI 0:4edb816d21e1 515 ACKCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj,
ICTFBI 0:4edb816d21e1 516 go->maxslotindex, go->cflag);
ICTFBI 0:4edb816d21e1 517
ICTFBI 0:4edb816d21e1 518 ACKCIDNS(CI_MS_DNS1, go->req_dns1, go->dnsaddr[0]);
ICTFBI 0:4edb816d21e1 519
ICTFBI 0:4edb816d21e1 520 ACKCIDNS(CI_MS_DNS2, go->req_dns2, go->dnsaddr[1]);
ICTFBI 0:4edb816d21e1 521
ICTFBI 0:4edb816d21e1 522 /*
ICTFBI 0:4edb816d21e1 523 * If there are any remaining CIs, then this packet is bad.
ICTFBI 0:4edb816d21e1 524 */
ICTFBI 0:4edb816d21e1 525 if (len != 0) {
ICTFBI 0:4edb816d21e1 526 goto bad;
ICTFBI 0:4edb816d21e1 527 }
ICTFBI 0:4edb816d21e1 528 return (1);
ICTFBI 0:4edb816d21e1 529
ICTFBI 0:4edb816d21e1 530 bad:
ICTFBI 0:4edb816d21e1 531 IPCPDEBUG(LOG_INFO, ("ipcp_ackci: received bad Ack!\n"));
ICTFBI 0:4edb816d21e1 532 return (0);
ICTFBI 0:4edb816d21e1 533 }
ICTFBI 0:4edb816d21e1 534
ICTFBI 0:4edb816d21e1 535 /*
ICTFBI 0:4edb816d21e1 536 * ipcp_nakci - Peer has sent a NAK for some of our CIs.
ICTFBI 0:4edb816d21e1 537 * This should not modify any state if the Nak is bad
ICTFBI 0:4edb816d21e1 538 * or if IPCP is in the LS_OPENED state.
ICTFBI 0:4edb816d21e1 539 *
ICTFBI 0:4edb816d21e1 540 * Returns:
ICTFBI 0:4edb816d21e1 541 * 0 - Nak was bad.
ICTFBI 0:4edb816d21e1 542 * 1 - Nak was good.
ICTFBI 0:4edb816d21e1 543 */
ICTFBI 0:4edb816d21e1 544 static int
ICTFBI 0:4edb816d21e1 545 ipcp_nakci(fsm *f, u_char *p, int len)
ICTFBI 0:4edb816d21e1 546 {
ICTFBI 0:4edb816d21e1 547 ipcp_options *go = &ipcp_gotoptions[f->unit];
ICTFBI 0:4edb816d21e1 548 u_char cimaxslotindex, cicflag;
ICTFBI 0:4edb816d21e1 549 u_char citype, cilen, *next;
ICTFBI 0:4edb816d21e1 550 u_short cishort;
ICTFBI 0:4edb816d21e1 551 u32_t ciaddr1, ciaddr2, l, cidnsaddr;
ICTFBI 0:4edb816d21e1 552 ipcp_options no; /* options we've seen Naks for */
ICTFBI 0:4edb816d21e1 553 ipcp_options try; /* options to request next time */
ICTFBI 0:4edb816d21e1 554
ICTFBI 0:4edb816d21e1 555 BZERO(&no, sizeof(no));
ICTFBI 0:4edb816d21e1 556 try = *go;
ICTFBI 0:4edb816d21e1 557
ICTFBI 0:4edb816d21e1 558 /*
ICTFBI 0:4edb816d21e1 559 * Any Nak'd CIs must be in exactly the same order that we sent.
ICTFBI 0:4edb816d21e1 560 * Check packet length and CI length at each step.
ICTFBI 0:4edb816d21e1 561 * If we find any deviations, then this packet is bad.
ICTFBI 0:4edb816d21e1 562 */
ICTFBI 0:4edb816d21e1 563 #define NAKCIADDR(opt, neg, old, code) \
ICTFBI 0:4edb816d21e1 564 if (go->neg && \
ICTFBI 0:4edb816d21e1 565 len >= (cilen = (old? CILEN_ADDRS: CILEN_ADDR)) && \
ICTFBI 0:4edb816d21e1 566 p[1] == cilen && \
ICTFBI 0:4edb816d21e1 567 p[0] == opt) { \
ICTFBI 0:4edb816d21e1 568 len -= cilen; \
ICTFBI 0:4edb816d21e1 569 INCPTR(2, p); \
ICTFBI 0:4edb816d21e1 570 GETLONG(l, p); \
ICTFBI 0:4edb816d21e1 571 ciaddr1 = htonl(l); \
ICTFBI 0:4edb816d21e1 572 if (old) { \
ICTFBI 0:4edb816d21e1 573 GETLONG(l, p); \
ICTFBI 0:4edb816d21e1 574 ciaddr2 = htonl(l); \
ICTFBI 0:4edb816d21e1 575 no.old_addrs = 1; \
ICTFBI 0:4edb816d21e1 576 } else { \
ICTFBI 0:4edb816d21e1 577 ciaddr2 = 0; \
ICTFBI 0:4edb816d21e1 578 } \
ICTFBI 0:4edb816d21e1 579 no.neg = 1; \
ICTFBI 0:4edb816d21e1 580 code \
ICTFBI 0:4edb816d21e1 581 }
ICTFBI 0:4edb816d21e1 582
ICTFBI 0:4edb816d21e1 583 #define NAKCIVJ(opt, neg, code) \
ICTFBI 0:4edb816d21e1 584 if (go->neg && \
ICTFBI 0:4edb816d21e1 585 ((cilen = p[1]) == CILEN_COMPRESS || cilen == CILEN_VJ) && \
ICTFBI 0:4edb816d21e1 586 len >= cilen && \
ICTFBI 0:4edb816d21e1 587 p[0] == opt) { \
ICTFBI 0:4edb816d21e1 588 len -= cilen; \
ICTFBI 0:4edb816d21e1 589 INCPTR(2, p); \
ICTFBI 0:4edb816d21e1 590 GETSHORT(cishort, p); \
ICTFBI 0:4edb816d21e1 591 no.neg = 1; \
ICTFBI 0:4edb816d21e1 592 code \
ICTFBI 0:4edb816d21e1 593 }
ICTFBI 0:4edb816d21e1 594
ICTFBI 0:4edb816d21e1 595 #define NAKCIDNS(opt, neg, code) \
ICTFBI 0:4edb816d21e1 596 if (go->neg && \
ICTFBI 0:4edb816d21e1 597 ((cilen = p[1]) == CILEN_ADDR) && \
ICTFBI 0:4edb816d21e1 598 len >= cilen && \
ICTFBI 0:4edb816d21e1 599 p[0] == opt) { \
ICTFBI 0:4edb816d21e1 600 len -= cilen; \
ICTFBI 0:4edb816d21e1 601 INCPTR(2, p); \
ICTFBI 0:4edb816d21e1 602 GETLONG(l, p); \
ICTFBI 0:4edb816d21e1 603 cidnsaddr = htonl(l); \
ICTFBI 0:4edb816d21e1 604 no.neg = 1; \
ICTFBI 0:4edb816d21e1 605 code \
ICTFBI 0:4edb816d21e1 606 }
ICTFBI 0:4edb816d21e1 607
ICTFBI 0:4edb816d21e1 608 /*
ICTFBI 0:4edb816d21e1 609 * Accept the peer's idea of {our,his} address, if different
ICTFBI 0:4edb816d21e1 610 * from our idea, only if the accept_{local,remote} flag is set.
ICTFBI 0:4edb816d21e1 611 */
ICTFBI 0:4edb816d21e1 612 NAKCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), neg_addr, go->old_addrs,
ICTFBI 0:4edb816d21e1 613 if (go->accept_local && ciaddr1) { /* Do we know our address? */
ICTFBI 0:4edb816d21e1 614 try.ouraddr = ciaddr1;
ICTFBI 0:4edb816d21e1 615 IPCPDEBUG(LOG_INFO, ("local IP address %s\n",
ICTFBI 0:4edb816d21e1 616 inet_ntoa(ciaddr1)));
ICTFBI 0:4edb816d21e1 617 }
ICTFBI 0:4edb816d21e1 618 if (go->accept_remote && ciaddr2) { /* Does he know his? */
ICTFBI 0:4edb816d21e1 619 try.hisaddr = ciaddr2;
ICTFBI 0:4edb816d21e1 620 IPCPDEBUG(LOG_INFO, ("remote IP address %s\n",
ICTFBI 0:4edb816d21e1 621 inet_ntoa(ciaddr2)));
ICTFBI 0:4edb816d21e1 622 }
ICTFBI 0:4edb816d21e1 623 );
ICTFBI 0:4edb816d21e1 624
ICTFBI 0:4edb816d21e1 625 /*
ICTFBI 0:4edb816d21e1 626 * Accept the peer's value of maxslotindex provided that it
ICTFBI 0:4edb816d21e1 627 * is less than what we asked for. Turn off slot-ID compression
ICTFBI 0:4edb816d21e1 628 * if the peer wants. Send old-style compress-type option if
ICTFBI 0:4edb816d21e1 629 * the peer wants.
ICTFBI 0:4edb816d21e1 630 */
ICTFBI 0:4edb816d21e1 631 NAKCIVJ(CI_COMPRESSTYPE, neg_vj,
ICTFBI 0:4edb816d21e1 632 if (cilen == CILEN_VJ) {
ICTFBI 0:4edb816d21e1 633 GETCHAR(cimaxslotindex, p);
ICTFBI 0:4edb816d21e1 634 GETCHAR(cicflag, p);
ICTFBI 0:4edb816d21e1 635 if (cishort == IPCP_VJ_COMP) {
ICTFBI 0:4edb816d21e1 636 try.old_vj = 0;
ICTFBI 0:4edb816d21e1 637 if (cimaxslotindex < go->maxslotindex) {
ICTFBI 0:4edb816d21e1 638 try.maxslotindex = cimaxslotindex;
ICTFBI 0:4edb816d21e1 639 }
ICTFBI 0:4edb816d21e1 640 if (!cicflag) {
ICTFBI 0:4edb816d21e1 641 try.cflag = 0;
ICTFBI 0:4edb816d21e1 642 }
ICTFBI 0:4edb816d21e1 643 } else {
ICTFBI 0:4edb816d21e1 644 try.neg_vj = 0;
ICTFBI 0:4edb816d21e1 645 }
ICTFBI 0:4edb816d21e1 646 } else {
ICTFBI 0:4edb816d21e1 647 if (cishort == IPCP_VJ_COMP || cishort == IPCP_VJ_COMP_OLD) {
ICTFBI 0:4edb816d21e1 648 try.old_vj = 1;
ICTFBI 0:4edb816d21e1 649 try.vj_protocol = cishort;
ICTFBI 0:4edb816d21e1 650 } else {
ICTFBI 0:4edb816d21e1 651 try.neg_vj = 0;
ICTFBI 0:4edb816d21e1 652 }
ICTFBI 0:4edb816d21e1 653 }
ICTFBI 0:4edb816d21e1 654 );
ICTFBI 0:4edb816d21e1 655
ICTFBI 0:4edb816d21e1 656 NAKCIDNS(CI_MS_DNS1, req_dns1,
ICTFBI 0:4edb816d21e1 657 try.dnsaddr[0] = cidnsaddr;
ICTFBI 0:4edb816d21e1 658 IPCPDEBUG(LOG_INFO, ("primary DNS address %s\n", inet_ntoa(cidnsaddr)));
ICTFBI 0:4edb816d21e1 659 );
ICTFBI 0:4edb816d21e1 660
ICTFBI 0:4edb816d21e1 661 NAKCIDNS(CI_MS_DNS2, req_dns2,
ICTFBI 0:4edb816d21e1 662 try.dnsaddr[1] = cidnsaddr;
ICTFBI 0:4edb816d21e1 663 IPCPDEBUG(LOG_INFO, ("secondary DNS address %s\n", inet_ntoa(cidnsaddr)));
ICTFBI 0:4edb816d21e1 664 );
ICTFBI 0:4edb816d21e1 665
ICTFBI 0:4edb816d21e1 666 /*
ICTFBI 0:4edb816d21e1 667 * There may be remaining CIs, if the peer is requesting negotiation
ICTFBI 0:4edb816d21e1 668 * on an option that we didn't include in our request packet.
ICTFBI 0:4edb816d21e1 669 * If they want to negotiate about IP addresses, we comply.
ICTFBI 0:4edb816d21e1 670 * If they want us to ask for compression, we refuse.
ICTFBI 0:4edb816d21e1 671 */
ICTFBI 0:4edb816d21e1 672 while (len > CILEN_VOID) {
ICTFBI 0:4edb816d21e1 673 GETCHAR(citype, p);
ICTFBI 0:4edb816d21e1 674 GETCHAR(cilen, p);
ICTFBI 0:4edb816d21e1 675 if( (len -= cilen) < 0 ) {
ICTFBI 0:4edb816d21e1 676 goto bad;
ICTFBI 0:4edb816d21e1 677 }
ICTFBI 0:4edb816d21e1 678 next = p + cilen - 2;
ICTFBI 0:4edb816d21e1 679
ICTFBI 0:4edb816d21e1 680 switch (citype) {
ICTFBI 0:4edb816d21e1 681 case CI_COMPRESSTYPE:
ICTFBI 0:4edb816d21e1 682 if (go->neg_vj || no.neg_vj ||
ICTFBI 0:4edb816d21e1 683 (cilen != CILEN_VJ && cilen != CILEN_COMPRESS)) {
ICTFBI 0:4edb816d21e1 684 goto bad;
ICTFBI 0:4edb816d21e1 685 }
ICTFBI 0:4edb816d21e1 686 no.neg_vj = 1;
ICTFBI 0:4edb816d21e1 687 break;
ICTFBI 0:4edb816d21e1 688 case CI_ADDRS:
ICTFBI 0:4edb816d21e1 689 if ((go->neg_addr && go->old_addrs) || no.old_addrs
ICTFBI 0:4edb816d21e1 690 || cilen != CILEN_ADDRS) {
ICTFBI 0:4edb816d21e1 691 goto bad;
ICTFBI 0:4edb816d21e1 692 }
ICTFBI 0:4edb816d21e1 693 try.neg_addr = 1;
ICTFBI 0:4edb816d21e1 694 try.old_addrs = 1;
ICTFBI 0:4edb816d21e1 695 GETLONG(l, p);
ICTFBI 0:4edb816d21e1 696 ciaddr1 = htonl(l);
ICTFBI 0:4edb816d21e1 697 if (ciaddr1 && go->accept_local) {
ICTFBI 0:4edb816d21e1 698 try.ouraddr = ciaddr1;
ICTFBI 0:4edb816d21e1 699 }
ICTFBI 0:4edb816d21e1 700 GETLONG(l, p);
ICTFBI 0:4edb816d21e1 701 ciaddr2 = htonl(l);
ICTFBI 0:4edb816d21e1 702 if (ciaddr2 && go->accept_remote) {
ICTFBI 0:4edb816d21e1 703 try.hisaddr = ciaddr2;
ICTFBI 0:4edb816d21e1 704 }
ICTFBI 0:4edb816d21e1 705 no.old_addrs = 1;
ICTFBI 0:4edb816d21e1 706 break;
ICTFBI 0:4edb816d21e1 707 case CI_ADDR:
ICTFBI 0:4edb816d21e1 708 if (go->neg_addr || no.neg_addr || cilen != CILEN_ADDR) {
ICTFBI 0:4edb816d21e1 709 goto bad;
ICTFBI 0:4edb816d21e1 710 }
ICTFBI 0:4edb816d21e1 711 try.old_addrs = 0;
ICTFBI 0:4edb816d21e1 712 GETLONG(l, p);
ICTFBI 0:4edb816d21e1 713 ciaddr1 = htonl(l);
ICTFBI 0:4edb816d21e1 714 if (ciaddr1 && go->accept_local) {
ICTFBI 0:4edb816d21e1 715 try.ouraddr = ciaddr1;
ICTFBI 0:4edb816d21e1 716 }
ICTFBI 0:4edb816d21e1 717 if (try.ouraddr != 0) {
ICTFBI 0:4edb816d21e1 718 try.neg_addr = 1;
ICTFBI 0:4edb816d21e1 719 }
ICTFBI 0:4edb816d21e1 720 no.neg_addr = 1;
ICTFBI 0:4edb816d21e1 721 break;
ICTFBI 0:4edb816d21e1 722 }
ICTFBI 0:4edb816d21e1 723 p = next;
ICTFBI 0:4edb816d21e1 724 }
ICTFBI 0:4edb816d21e1 725
ICTFBI 0:4edb816d21e1 726 /* If there is still anything left, this packet is bad. */
ICTFBI 0:4edb816d21e1 727 if (len != 0) {
ICTFBI 0:4edb816d21e1 728 goto bad;
ICTFBI 0:4edb816d21e1 729 }
ICTFBI 0:4edb816d21e1 730
ICTFBI 0:4edb816d21e1 731 /*
ICTFBI 0:4edb816d21e1 732 * OK, the Nak is good. Now we can update state.
ICTFBI 0:4edb816d21e1 733 */
ICTFBI 0:4edb816d21e1 734 if (f->state != LS_OPENED) {
ICTFBI 0:4edb816d21e1 735 *go = try;
ICTFBI 0:4edb816d21e1 736 }
ICTFBI 0:4edb816d21e1 737
ICTFBI 0:4edb816d21e1 738 return 1;
ICTFBI 0:4edb816d21e1 739
ICTFBI 0:4edb816d21e1 740 bad:
ICTFBI 0:4edb816d21e1 741 IPCPDEBUG(LOG_INFO, ("ipcp_nakci: received bad Nak!\n"));
ICTFBI 0:4edb816d21e1 742 return 0;
ICTFBI 0:4edb816d21e1 743 }
ICTFBI 0:4edb816d21e1 744
ICTFBI 0:4edb816d21e1 745
ICTFBI 0:4edb816d21e1 746 /*
ICTFBI 0:4edb816d21e1 747 * ipcp_rejci - Reject some of our CIs.
ICTFBI 0:4edb816d21e1 748 */
ICTFBI 0:4edb816d21e1 749 static int
ICTFBI 0:4edb816d21e1 750 ipcp_rejci(fsm *f, u_char *p, int len)
ICTFBI 0:4edb816d21e1 751 {
ICTFBI 0:4edb816d21e1 752 ipcp_options *go = &ipcp_gotoptions[f->unit];
ICTFBI 0:4edb816d21e1 753 u_char cimaxslotindex, ciflag, cilen;
ICTFBI 0:4edb816d21e1 754 u_short cishort;
ICTFBI 0:4edb816d21e1 755 u32_t cilong;
ICTFBI 0:4edb816d21e1 756 ipcp_options try; /* options to request next time */
ICTFBI 0:4edb816d21e1 757
ICTFBI 0:4edb816d21e1 758 try = *go;
ICTFBI 0:4edb816d21e1 759 /*
ICTFBI 0:4edb816d21e1 760 * Any Rejected CIs must be in exactly the same order that we sent.
ICTFBI 0:4edb816d21e1 761 * Check packet length and CI length at each step.
ICTFBI 0:4edb816d21e1 762 * If we find any deviations, then this packet is bad.
ICTFBI 0:4edb816d21e1 763 */
ICTFBI 0:4edb816d21e1 764 #define REJCIADDR(opt, neg, old, val1, val2) \
ICTFBI 0:4edb816d21e1 765 if (go->neg && \
ICTFBI 0:4edb816d21e1 766 len >= (cilen = old? CILEN_ADDRS: CILEN_ADDR) && \
ICTFBI 0:4edb816d21e1 767 p[1] == cilen && \
ICTFBI 0:4edb816d21e1 768 p[0] == opt) { \
ICTFBI 0:4edb816d21e1 769 u32_t l; \
ICTFBI 0:4edb816d21e1 770 len -= cilen; \
ICTFBI 0:4edb816d21e1 771 INCPTR(2, p); \
ICTFBI 0:4edb816d21e1 772 GETLONG(l, p); \
ICTFBI 0:4edb816d21e1 773 cilong = htonl(l); \
ICTFBI 0:4edb816d21e1 774 /* Check rejected value. */ \
ICTFBI 0:4edb816d21e1 775 if (cilong != val1) { \
ICTFBI 0:4edb816d21e1 776 goto bad; \
ICTFBI 0:4edb816d21e1 777 } \
ICTFBI 0:4edb816d21e1 778 if (old) { \
ICTFBI 0:4edb816d21e1 779 GETLONG(l, p); \
ICTFBI 0:4edb816d21e1 780 cilong = htonl(l); \
ICTFBI 0:4edb816d21e1 781 /* Check rejected value. */ \
ICTFBI 0:4edb816d21e1 782 if (cilong != val2) { \
ICTFBI 0:4edb816d21e1 783 goto bad; \
ICTFBI 0:4edb816d21e1 784 } \
ICTFBI 0:4edb816d21e1 785 } \
ICTFBI 0:4edb816d21e1 786 try.neg = 0; \
ICTFBI 0:4edb816d21e1 787 }
ICTFBI 0:4edb816d21e1 788
ICTFBI 0:4edb816d21e1 789 #define REJCIVJ(opt, neg, val, old, maxslot, cflag) \
ICTFBI 0:4edb816d21e1 790 if (go->neg && \
ICTFBI 0:4edb816d21e1 791 p[1] == (old? CILEN_COMPRESS : CILEN_VJ) && \
ICTFBI 0:4edb816d21e1 792 len >= p[1] && \
ICTFBI 0:4edb816d21e1 793 p[0] == opt) { \
ICTFBI 0:4edb816d21e1 794 len -= p[1]; \
ICTFBI 0:4edb816d21e1 795 INCPTR(2, p); \
ICTFBI 0:4edb816d21e1 796 GETSHORT(cishort, p); \
ICTFBI 0:4edb816d21e1 797 /* Check rejected value. */ \
ICTFBI 0:4edb816d21e1 798 if (cishort != val) { \
ICTFBI 0:4edb816d21e1 799 goto bad; \
ICTFBI 0:4edb816d21e1 800 } \
ICTFBI 0:4edb816d21e1 801 if (!old) { \
ICTFBI 0:4edb816d21e1 802 GETCHAR(cimaxslotindex, p); \
ICTFBI 0:4edb816d21e1 803 if (cimaxslotindex != maxslot) { \
ICTFBI 0:4edb816d21e1 804 goto bad; \
ICTFBI 0:4edb816d21e1 805 } \
ICTFBI 0:4edb816d21e1 806 GETCHAR(ciflag, p); \
ICTFBI 0:4edb816d21e1 807 if (ciflag != cflag) { \
ICTFBI 0:4edb816d21e1 808 goto bad; \
ICTFBI 0:4edb816d21e1 809 } \
ICTFBI 0:4edb816d21e1 810 } \
ICTFBI 0:4edb816d21e1 811 try.neg = 0; \
ICTFBI 0:4edb816d21e1 812 }
ICTFBI 0:4edb816d21e1 813
ICTFBI 0:4edb816d21e1 814 #define REJCIDNS(opt, neg, dnsaddr) \
ICTFBI 0:4edb816d21e1 815 if (go->neg && \
ICTFBI 0:4edb816d21e1 816 ((cilen = p[1]) == CILEN_ADDR) && \
ICTFBI 0:4edb816d21e1 817 len >= cilen && \
ICTFBI 0:4edb816d21e1 818 p[0] == opt) { \
ICTFBI 0:4edb816d21e1 819 u32_t l; \
ICTFBI 0:4edb816d21e1 820 len -= cilen; \
ICTFBI 0:4edb816d21e1 821 INCPTR(2, p); \
ICTFBI 0:4edb816d21e1 822 GETLONG(l, p); \
ICTFBI 0:4edb816d21e1 823 cilong = htonl(l); \
ICTFBI 0:4edb816d21e1 824 /* Check rejected value. */ \
ICTFBI 0:4edb816d21e1 825 if (cilong != dnsaddr) { \
ICTFBI 0:4edb816d21e1 826 goto bad; \
ICTFBI 0:4edb816d21e1 827 } \
ICTFBI 0:4edb816d21e1 828 try.neg = 0; \
ICTFBI 0:4edb816d21e1 829 }
ICTFBI 0:4edb816d21e1 830
ICTFBI 0:4edb816d21e1 831 REJCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), neg_addr,
ICTFBI 0:4edb816d21e1 832 go->old_addrs, go->ouraddr, go->hisaddr);
ICTFBI 0:4edb816d21e1 833
ICTFBI 0:4edb816d21e1 834 REJCIVJ(CI_COMPRESSTYPE, neg_vj, go->vj_protocol, go->old_vj,
ICTFBI 0:4edb816d21e1 835 go->maxslotindex, go->cflag);
ICTFBI 0:4edb816d21e1 836
ICTFBI 0:4edb816d21e1 837 REJCIDNS(CI_MS_DNS1, req_dns1, go->dnsaddr[0]);
ICTFBI 0:4edb816d21e1 838
ICTFBI 0:4edb816d21e1 839 REJCIDNS(CI_MS_DNS2, req_dns2, go->dnsaddr[1]);
ICTFBI 0:4edb816d21e1 840
ICTFBI 0:4edb816d21e1 841 /*
ICTFBI 0:4edb816d21e1 842 * If there are any remaining CIs, then this packet is bad.
ICTFBI 0:4edb816d21e1 843 */
ICTFBI 0:4edb816d21e1 844 if (len != 0) {
ICTFBI 0:4edb816d21e1 845 goto bad;
ICTFBI 0:4edb816d21e1 846 }
ICTFBI 0:4edb816d21e1 847 /*
ICTFBI 0:4edb816d21e1 848 * Now we can update state.
ICTFBI 0:4edb816d21e1 849 */
ICTFBI 0:4edb816d21e1 850 if (f->state != LS_OPENED) {
ICTFBI 0:4edb816d21e1 851 *go = try;
ICTFBI 0:4edb816d21e1 852 }
ICTFBI 0:4edb816d21e1 853 return 1;
ICTFBI 0:4edb816d21e1 854
ICTFBI 0:4edb816d21e1 855 bad:
ICTFBI 0:4edb816d21e1 856 IPCPDEBUG(LOG_INFO, ("ipcp_rejci: received bad Reject!\n"));
ICTFBI 0:4edb816d21e1 857 return 0;
ICTFBI 0:4edb816d21e1 858 }
ICTFBI 0:4edb816d21e1 859
ICTFBI 0:4edb816d21e1 860
ICTFBI 0:4edb816d21e1 861 /*
ICTFBI 0:4edb816d21e1 862 * ipcp_reqci - Check the peer's requested CIs and send appropriate response.
ICTFBI 0:4edb816d21e1 863 *
ICTFBI 0:4edb816d21e1 864 * Returns: CONFACK, CONFNAK or CONFREJ and input packet modified
ICTFBI 0:4edb816d21e1 865 * appropriately. If reject_if_disagree is non-zero, doesn't return
ICTFBI 0:4edb816d21e1 866 * CONFNAK; returns CONFREJ if it can't return CONFACK.
ICTFBI 0:4edb816d21e1 867 */
ICTFBI 0:4edb816d21e1 868 static int
ICTFBI 0:4edb816d21e1 869 ipcp_reqci(fsm *f, u_char *inp/* Requested CIs */,int *len/* Length of requested CIs */,int reject_if_disagree)
ICTFBI 0:4edb816d21e1 870 {
ICTFBI 0:4edb816d21e1 871 ipcp_options *wo = &ipcp_wantoptions[f->unit];
ICTFBI 0:4edb816d21e1 872 ipcp_options *ho = &ipcp_hisoptions[f->unit];
ICTFBI 0:4edb816d21e1 873 ipcp_options *ao = &ipcp_allowoptions[f->unit];
ICTFBI 0:4edb816d21e1 874 #ifdef OLD_CI_ADDRS
ICTFBI 0:4edb816d21e1 875 ipcp_options *go = &ipcp_gotoptions[f->unit];
ICTFBI 0:4edb816d21e1 876 #endif
ICTFBI 0:4edb816d21e1 877 u_char *cip, *next; /* Pointer to current and next CIs */
ICTFBI 0:4edb816d21e1 878 u_short cilen, citype; /* Parsed len, type */
ICTFBI 0:4edb816d21e1 879 u_short cishort; /* Parsed short value */
ICTFBI 0:4edb816d21e1 880 u32_t tl, ciaddr1; /* Parsed address values */
ICTFBI 0:4edb816d21e1 881 #ifdef OLD_CI_ADDRS
ICTFBI 0:4edb816d21e1 882 u32_t ciaddr2; /* Parsed address values */
ICTFBI 0:4edb816d21e1 883 #endif
ICTFBI 0:4edb816d21e1 884 int rc = CONFACK; /* Final packet return code */
ICTFBI 0:4edb816d21e1 885 int orc; /* Individual option return code */
ICTFBI 0:4edb816d21e1 886 u_char *p; /* Pointer to next char to parse */
ICTFBI 0:4edb816d21e1 887 u_char *ucp = inp; /* Pointer to current output char */
ICTFBI 0:4edb816d21e1 888 int l = *len; /* Length left */
ICTFBI 0:4edb816d21e1 889 u_char maxslotindex, cflag;
ICTFBI 0:4edb816d21e1 890 int d;
ICTFBI 0:4edb816d21e1 891
ICTFBI 0:4edb816d21e1 892 cis_received[f->unit] = 1;
ICTFBI 0:4edb816d21e1 893
ICTFBI 0:4edb816d21e1 894 /*
ICTFBI 0:4edb816d21e1 895 * Reset all his options.
ICTFBI 0:4edb816d21e1 896 */
ICTFBI 0:4edb816d21e1 897 BZERO(ho, sizeof(*ho));
ICTFBI 0:4edb816d21e1 898
ICTFBI 0:4edb816d21e1 899 /*
ICTFBI 0:4edb816d21e1 900 * Process all his options.
ICTFBI 0:4edb816d21e1 901 */
ICTFBI 0:4edb816d21e1 902 next = inp;
ICTFBI 0:4edb816d21e1 903 while (l) {
ICTFBI 0:4edb816d21e1 904 orc = CONFACK; /* Assume success */
ICTFBI 0:4edb816d21e1 905 cip = p = next; /* Remember begining of CI */
ICTFBI 0:4edb816d21e1 906 if (l < 2 || /* Not enough data for CI header or */
ICTFBI 0:4edb816d21e1 907 p[1] < 2 || /* CI length too small or */
ICTFBI 0:4edb816d21e1 908 p[1] > l) { /* CI length too big? */
ICTFBI 0:4edb816d21e1 909 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: bad CI length!\n"));
ICTFBI 0:4edb816d21e1 910 orc = CONFREJ; /* Reject bad CI */
ICTFBI 0:4edb816d21e1 911 cilen = (u_short)l;/* Reject till end of packet */
ICTFBI 0:4edb816d21e1 912 l = 0; /* Don't loop again */
ICTFBI 0:4edb816d21e1 913 goto endswitch;
ICTFBI 0:4edb816d21e1 914 }
ICTFBI 0:4edb816d21e1 915 GETCHAR(citype, p); /* Parse CI type */
ICTFBI 0:4edb816d21e1 916 GETCHAR(cilen, p); /* Parse CI length */
ICTFBI 0:4edb816d21e1 917 l -= cilen; /* Adjust remaining length */
ICTFBI 0:4edb816d21e1 918 next += cilen; /* Step to next CI */
ICTFBI 0:4edb816d21e1 919
ICTFBI 0:4edb816d21e1 920 switch (citype) { /* Check CI type */
ICTFBI 0:4edb816d21e1 921 #ifdef OLD_CI_ADDRS /* Need to save space... */
ICTFBI 0:4edb816d21e1 922 case CI_ADDRS:
ICTFBI 0:4edb816d21e1 923 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received ADDRS\n"));
ICTFBI 0:4edb816d21e1 924 if (!ao->neg_addr ||
ICTFBI 0:4edb816d21e1 925 cilen != CILEN_ADDRS) { /* Check CI length */
ICTFBI 0:4edb816d21e1 926 orc = CONFREJ; /* Reject CI */
ICTFBI 0:4edb816d21e1 927 break;
ICTFBI 0:4edb816d21e1 928 }
ICTFBI 0:4edb816d21e1 929
ICTFBI 0:4edb816d21e1 930 /*
ICTFBI 0:4edb816d21e1 931 * If he has no address, or if we both have his address but
ICTFBI 0:4edb816d21e1 932 * disagree about it, then NAK it with our idea.
ICTFBI 0:4edb816d21e1 933 * In particular, if we don't know his address, but he does,
ICTFBI 0:4edb816d21e1 934 * then accept it.
ICTFBI 0:4edb816d21e1 935 */
ICTFBI 0:4edb816d21e1 936 GETLONG(tl, p); /* Parse source address (his) */
ICTFBI 0:4edb816d21e1 937 ciaddr1 = htonl(tl);
ICTFBI 0:4edb816d21e1 938 IPCPDEBUG(LOG_INFO, ("his addr %s\n", inet_ntoa(ciaddr1)));
ICTFBI 0:4edb816d21e1 939 if (ciaddr1 != wo->hisaddr
ICTFBI 0:4edb816d21e1 940 && (ciaddr1 == 0 || !wo->accept_remote)) {
ICTFBI 0:4edb816d21e1 941 orc = CONFNAK;
ICTFBI 0:4edb816d21e1 942 if (!reject_if_disagree) {
ICTFBI 0:4edb816d21e1 943 DECPTR(sizeof(u32_t), p);
ICTFBI 0:4edb816d21e1 944 tl = ntohl(wo->hisaddr);
ICTFBI 0:4edb816d21e1 945 PUTLONG(tl, p);
ICTFBI 0:4edb816d21e1 946 }
ICTFBI 0:4edb816d21e1 947 } else if (ciaddr1 == 0 && wo->hisaddr == 0) {
ICTFBI 0:4edb816d21e1 948 /*
ICTFBI 0:4edb816d21e1 949 * If neither we nor he knows his address, reject the option.
ICTFBI 0:4edb816d21e1 950 */
ICTFBI 0:4edb816d21e1 951 orc = CONFREJ;
ICTFBI 0:4edb816d21e1 952 wo->req_addr = 0; /* don't NAK with 0.0.0.0 later */
ICTFBI 0:4edb816d21e1 953 break;
ICTFBI 0:4edb816d21e1 954 }
ICTFBI 0:4edb816d21e1 955
ICTFBI 0:4edb816d21e1 956 /*
ICTFBI 0:4edb816d21e1 957 * If he doesn't know our address, or if we both have our address
ICTFBI 0:4edb816d21e1 958 * but disagree about it, then NAK it with our idea.
ICTFBI 0:4edb816d21e1 959 */
ICTFBI 0:4edb816d21e1 960 GETLONG(tl, p); /* Parse desination address (ours) */
ICTFBI 0:4edb816d21e1 961 ciaddr2 = htonl(tl);
ICTFBI 0:4edb816d21e1 962 IPCPDEBUG(LOG_INFO, ("our addr %s\n", inet_ntoa(ciaddr2)));
ICTFBI 0:4edb816d21e1 963 if (ciaddr2 != wo->ouraddr) {
ICTFBI 0:4edb816d21e1 964 if (ciaddr2 == 0 || !wo->accept_local) {
ICTFBI 0:4edb816d21e1 965 orc = CONFNAK;
ICTFBI 0:4edb816d21e1 966 if (!reject_if_disagree) {
ICTFBI 0:4edb816d21e1 967 DECPTR(sizeof(u32_t), p);
ICTFBI 0:4edb816d21e1 968 tl = ntohl(wo->ouraddr);
ICTFBI 0:4edb816d21e1 969 PUTLONG(tl, p);
ICTFBI 0:4edb816d21e1 970 }
ICTFBI 0:4edb816d21e1 971 } else {
ICTFBI 0:4edb816d21e1 972 go->ouraddr = ciaddr2; /* accept peer's idea */
ICTFBI 0:4edb816d21e1 973 }
ICTFBI 0:4edb816d21e1 974 }
ICTFBI 0:4edb816d21e1 975
ICTFBI 0:4edb816d21e1 976 ho->neg_addr = 1;
ICTFBI 0:4edb816d21e1 977 ho->old_addrs = 1;
ICTFBI 0:4edb816d21e1 978 ho->hisaddr = ciaddr1;
ICTFBI 0:4edb816d21e1 979 ho->ouraddr = ciaddr2;
ICTFBI 0:4edb816d21e1 980 break;
ICTFBI 0:4edb816d21e1 981 #endif
ICTFBI 0:4edb816d21e1 982
ICTFBI 0:4edb816d21e1 983 case CI_ADDR:
ICTFBI 0:4edb816d21e1 984 if (!ao->neg_addr) {
ICTFBI 0:4edb816d21e1 985 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR not allowed\n"));
ICTFBI 0:4edb816d21e1 986 orc = CONFREJ; /* Reject CI */
ICTFBI 0:4edb816d21e1 987 break;
ICTFBI 0:4edb816d21e1 988 } else if (cilen != CILEN_ADDR) { /* Check CI length */
ICTFBI 0:4edb816d21e1 989 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR bad len\n"));
ICTFBI 0:4edb816d21e1 990 orc = CONFREJ; /* Reject CI */
ICTFBI 0:4edb816d21e1 991 break;
ICTFBI 0:4edb816d21e1 992 }
ICTFBI 0:4edb816d21e1 993
ICTFBI 0:4edb816d21e1 994 /*
ICTFBI 0:4edb816d21e1 995 * If he has no address, or if we both have his address but
ICTFBI 0:4edb816d21e1 996 * disagree about it, then NAK it with our idea.
ICTFBI 0:4edb816d21e1 997 * In particular, if we don't know his address, but he does,
ICTFBI 0:4edb816d21e1 998 * then accept it.
ICTFBI 0:4edb816d21e1 999 */
ICTFBI 0:4edb816d21e1 1000 GETLONG(tl, p); /* Parse source address (his) */
ICTFBI 0:4edb816d21e1 1001 ciaddr1 = htonl(tl);
ICTFBI 0:4edb816d21e1 1002 if (ciaddr1 != wo->hisaddr
ICTFBI 0:4edb816d21e1 1003 && (ciaddr1 == 0 || !wo->accept_remote)) {
ICTFBI 0:4edb816d21e1 1004 orc = CONFNAK;
ICTFBI 0:4edb816d21e1 1005 if (!reject_if_disagree) {
ICTFBI 0:4edb816d21e1 1006 DECPTR(sizeof(u32_t), p);
ICTFBI 0:4edb816d21e1 1007 tl = ntohl(wo->hisaddr);
ICTFBI 0:4edb816d21e1 1008 PUTLONG(tl, p);
ICTFBI 0:4edb816d21e1 1009 }
ICTFBI 0:4edb816d21e1 1010 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Nak ADDR %s\n", inet_ntoa(ciaddr1)));
ICTFBI 0:4edb816d21e1 1011 } else if (ciaddr1 == 0 && wo->hisaddr == 0) {
ICTFBI 0:4edb816d21e1 1012 /*
ICTFBI 0:4edb816d21e1 1013 * Don't ACK an address of 0.0.0.0 - reject it instead.
ICTFBI 0:4edb816d21e1 1014 */
ICTFBI 0:4edb816d21e1 1015 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR %s\n", inet_ntoa(ciaddr1)));
ICTFBI 0:4edb816d21e1 1016 orc = CONFREJ;
ICTFBI 0:4edb816d21e1 1017 wo->req_addr = 0; /* don't NAK with 0.0.0.0 later */
ICTFBI 0:4edb816d21e1 1018 break;
ICTFBI 0:4edb816d21e1 1019 }
ICTFBI 0:4edb816d21e1 1020
ICTFBI 0:4edb816d21e1 1021 ho->neg_addr = 1;
ICTFBI 0:4edb816d21e1 1022 ho->hisaddr = ciaddr1;
ICTFBI 0:4edb816d21e1 1023 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: ADDR %s\n", inet_ntoa(ciaddr1)));
ICTFBI 0:4edb816d21e1 1024 break;
ICTFBI 0:4edb816d21e1 1025
ICTFBI 0:4edb816d21e1 1026 case CI_MS_DNS1:
ICTFBI 0:4edb816d21e1 1027 case CI_MS_DNS2:
ICTFBI 0:4edb816d21e1 1028 /* Microsoft primary or secondary DNS request */
ICTFBI 0:4edb816d21e1 1029 d = citype == CI_MS_DNS2;
ICTFBI 0:4edb816d21e1 1030
ICTFBI 0:4edb816d21e1 1031 /* If we do not have a DNS address then we cannot send it */
ICTFBI 0:4edb816d21e1 1032 if (ao->dnsaddr[d] == 0 ||
ICTFBI 0:4edb816d21e1 1033 cilen != CILEN_ADDR) { /* Check CI length */
ICTFBI 0:4edb816d21e1 1034 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting DNS%d Request\n", d+1));
ICTFBI 0:4edb816d21e1 1035 orc = CONFREJ; /* Reject CI */
ICTFBI 0:4edb816d21e1 1036 break;
ICTFBI 0:4edb816d21e1 1037 }
ICTFBI 0:4edb816d21e1 1038 GETLONG(tl, p);
ICTFBI 0:4edb816d21e1 1039 if (htonl(tl) != ao->dnsaddr[d]) {
ICTFBI 0:4edb816d21e1 1040 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking DNS%d Request %s\n",
ICTFBI 0:4edb816d21e1 1041 d+1, inet_ntoa(tl)));
ICTFBI 0:4edb816d21e1 1042 DECPTR(sizeof(u32_t), p);
ICTFBI 0:4edb816d21e1 1043 tl = ntohl(ao->dnsaddr[d]);
ICTFBI 0:4edb816d21e1 1044 PUTLONG(tl, p);
ICTFBI 0:4edb816d21e1 1045 orc = CONFNAK;
ICTFBI 0:4edb816d21e1 1046 }
ICTFBI 0:4edb816d21e1 1047 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received DNS%d Request\n", d+1));
ICTFBI 0:4edb816d21e1 1048 break;
ICTFBI 0:4edb816d21e1 1049
ICTFBI 0:4edb816d21e1 1050 case CI_MS_WINS1:
ICTFBI 0:4edb816d21e1 1051 case CI_MS_WINS2:
ICTFBI 0:4edb816d21e1 1052 /* Microsoft primary or secondary WINS request */
ICTFBI 0:4edb816d21e1 1053 d = citype == CI_MS_WINS2;
ICTFBI 0:4edb816d21e1 1054 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received WINS%d Request\n", d+1));
ICTFBI 0:4edb816d21e1 1055
ICTFBI 0:4edb816d21e1 1056 /* If we do not have a DNS address then we cannot send it */
ICTFBI 0:4edb816d21e1 1057 if (ao->winsaddr[d] == 0 ||
ICTFBI 0:4edb816d21e1 1058 cilen != CILEN_ADDR) { /* Check CI length */
ICTFBI 0:4edb816d21e1 1059 orc = CONFREJ; /* Reject CI */
ICTFBI 0:4edb816d21e1 1060 break;
ICTFBI 0:4edb816d21e1 1061 }
ICTFBI 0:4edb816d21e1 1062 GETLONG(tl, p);
ICTFBI 0:4edb816d21e1 1063 if (htonl(tl) != ao->winsaddr[d]) {
ICTFBI 0:4edb816d21e1 1064 DECPTR(sizeof(u32_t), p);
ICTFBI 0:4edb816d21e1 1065 tl = ntohl(ao->winsaddr[d]);
ICTFBI 0:4edb816d21e1 1066 PUTLONG(tl, p);
ICTFBI 0:4edb816d21e1 1067 orc = CONFNAK;
ICTFBI 0:4edb816d21e1 1068 }
ICTFBI 0:4edb816d21e1 1069 break;
ICTFBI 0:4edb816d21e1 1070
ICTFBI 0:4edb816d21e1 1071 case CI_COMPRESSTYPE:
ICTFBI 0:4edb816d21e1 1072 if (!ao->neg_vj) {
ICTFBI 0:4edb816d21e1 1073 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE not allowed\n"));
ICTFBI 0:4edb816d21e1 1074 orc = CONFREJ;
ICTFBI 0:4edb816d21e1 1075 break;
ICTFBI 0:4edb816d21e1 1076 } else if (cilen != CILEN_VJ && cilen != CILEN_COMPRESS) {
ICTFBI 0:4edb816d21e1 1077 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE len=%d\n", cilen));
ICTFBI 0:4edb816d21e1 1078 orc = CONFREJ;
ICTFBI 0:4edb816d21e1 1079 break;
ICTFBI 0:4edb816d21e1 1080 }
ICTFBI 0:4edb816d21e1 1081 GETSHORT(cishort, p);
ICTFBI 0:4edb816d21e1 1082
ICTFBI 0:4edb816d21e1 1083 if (!(cishort == IPCP_VJ_COMP ||
ICTFBI 0:4edb816d21e1 1084 (cishort == IPCP_VJ_COMP_OLD && cilen == CILEN_COMPRESS))) {
ICTFBI 0:4edb816d21e1 1085 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE %d\n", cishort));
ICTFBI 0:4edb816d21e1 1086 orc = CONFREJ;
ICTFBI 0:4edb816d21e1 1087 break;
ICTFBI 0:4edb816d21e1 1088 }
ICTFBI 0:4edb816d21e1 1089
ICTFBI 0:4edb816d21e1 1090 ho->neg_vj = 1;
ICTFBI 0:4edb816d21e1 1091 ho->vj_protocol = cishort;
ICTFBI 0:4edb816d21e1 1092 if (cilen == CILEN_VJ) {
ICTFBI 0:4edb816d21e1 1093 GETCHAR(maxslotindex, p);
ICTFBI 0:4edb816d21e1 1094 if (maxslotindex > ao->maxslotindex) {
ICTFBI 0:4edb816d21e1 1095 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking VJ max slot %d\n", maxslotindex));
ICTFBI 0:4edb816d21e1 1096 orc = CONFNAK;
ICTFBI 0:4edb816d21e1 1097 if (!reject_if_disagree) {
ICTFBI 0:4edb816d21e1 1098 DECPTR(1, p);
ICTFBI 0:4edb816d21e1 1099 PUTCHAR(ao->maxslotindex, p);
ICTFBI 0:4edb816d21e1 1100 }
ICTFBI 0:4edb816d21e1 1101 }
ICTFBI 0:4edb816d21e1 1102 GETCHAR(cflag, p);
ICTFBI 0:4edb816d21e1 1103 if (cflag && !ao->cflag) {
ICTFBI 0:4edb816d21e1 1104 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking VJ cflag %d\n", cflag));
ICTFBI 0:4edb816d21e1 1105 orc = CONFNAK;
ICTFBI 0:4edb816d21e1 1106 if (!reject_if_disagree) {
ICTFBI 0:4edb816d21e1 1107 DECPTR(1, p);
ICTFBI 0:4edb816d21e1 1108 PUTCHAR(wo->cflag, p);
ICTFBI 0:4edb816d21e1 1109 }
ICTFBI 0:4edb816d21e1 1110 }
ICTFBI 0:4edb816d21e1 1111 ho->maxslotindex = maxslotindex;
ICTFBI 0:4edb816d21e1 1112 ho->cflag = cflag;
ICTFBI 0:4edb816d21e1 1113 } else {
ICTFBI 0:4edb816d21e1 1114 ho->old_vj = 1;
ICTFBI 0:4edb816d21e1 1115 ho->maxslotindex = MAX_SLOTS - 1;
ICTFBI 0:4edb816d21e1 1116 ho->cflag = 1;
ICTFBI 0:4edb816d21e1 1117 }
ICTFBI 0:4edb816d21e1 1118 IPCPDEBUG(LOG_INFO, (
ICTFBI 0:4edb816d21e1 1119 "ipcp_reqci: received COMPRESSTYPE p=%d old=%d maxslot=%d cflag=%d\n",
ICTFBI 0:4edb816d21e1 1120 ho->vj_protocol, ho->old_vj, ho->maxslotindex, ho->cflag));
ICTFBI 0:4edb816d21e1 1121 break;
ICTFBI 0:4edb816d21e1 1122
ICTFBI 0:4edb816d21e1 1123 default:
ICTFBI 0:4edb816d21e1 1124 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting unknown CI type %d\n", citype));
ICTFBI 0:4edb816d21e1 1125 orc = CONFREJ;
ICTFBI 0:4edb816d21e1 1126 break;
ICTFBI 0:4edb816d21e1 1127 }
ICTFBI 0:4edb816d21e1 1128
ICTFBI 0:4edb816d21e1 1129 endswitch:
ICTFBI 0:4edb816d21e1 1130 if (orc == CONFACK && /* Good CI */
ICTFBI 0:4edb816d21e1 1131 rc != CONFACK) { /* but prior CI wasnt? */
ICTFBI 0:4edb816d21e1 1132 continue; /* Don't send this one */
ICTFBI 0:4edb816d21e1 1133 }
ICTFBI 0:4edb816d21e1 1134
ICTFBI 0:4edb816d21e1 1135 if (orc == CONFNAK) { /* Nak this CI? */
ICTFBI 0:4edb816d21e1 1136 if (reject_if_disagree) { /* Getting fed up with sending NAKs? */
ICTFBI 0:4edb816d21e1 1137 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting too many naks\n"));
ICTFBI 0:4edb816d21e1 1138 orc = CONFREJ; /* Get tough if so */
ICTFBI 0:4edb816d21e1 1139 } else {
ICTFBI 0:4edb816d21e1 1140 if (rc == CONFREJ) { /* Rejecting prior CI? */
ICTFBI 0:4edb816d21e1 1141 continue; /* Don't send this one */
ICTFBI 0:4edb816d21e1 1142 }
ICTFBI 0:4edb816d21e1 1143 if (rc == CONFACK) { /* Ack'd all prior CIs? */
ICTFBI 0:4edb816d21e1 1144 rc = CONFNAK; /* Not anymore... */
ICTFBI 0:4edb816d21e1 1145 ucp = inp; /* Backup */
ICTFBI 0:4edb816d21e1 1146 }
ICTFBI 0:4edb816d21e1 1147 }
ICTFBI 0:4edb816d21e1 1148 }
ICTFBI 0:4edb816d21e1 1149
ICTFBI 0:4edb816d21e1 1150 if (orc == CONFREJ && /* Reject this CI */
ICTFBI 0:4edb816d21e1 1151 rc != CONFREJ) { /* but no prior ones? */
ICTFBI 0:4edb816d21e1 1152 rc = CONFREJ;
ICTFBI 0:4edb816d21e1 1153 ucp = inp; /* Backup */
ICTFBI 0:4edb816d21e1 1154 }
ICTFBI 0:4edb816d21e1 1155
ICTFBI 0:4edb816d21e1 1156 /* Need to move CI? */
ICTFBI 0:4edb816d21e1 1157 if (ucp != cip) {
ICTFBI 0:4edb816d21e1 1158 BCOPY(cip, ucp, cilen); /* Move it */
ICTFBI 0:4edb816d21e1 1159 }
ICTFBI 0:4edb816d21e1 1160
ICTFBI 0:4edb816d21e1 1161 /* Update output pointer */
ICTFBI 0:4edb816d21e1 1162 INCPTR(cilen, ucp);
ICTFBI 0:4edb816d21e1 1163 }
ICTFBI 0:4edb816d21e1 1164
ICTFBI 0:4edb816d21e1 1165 /*
ICTFBI 0:4edb816d21e1 1166 * If we aren't rejecting this packet, and we want to negotiate
ICTFBI 0:4edb816d21e1 1167 * their address, and they didn't send their address, then we
ICTFBI 0:4edb816d21e1 1168 * send a NAK with a CI_ADDR option appended. We assume the
ICTFBI 0:4edb816d21e1 1169 * input buffer is long enough that we can append the extra
ICTFBI 0:4edb816d21e1 1170 * option safely.
ICTFBI 0:4edb816d21e1 1171 */
ICTFBI 0:4edb816d21e1 1172 if (rc != CONFREJ && !ho->neg_addr &&
ICTFBI 0:4edb816d21e1 1173 wo->req_addr && !reject_if_disagree) {
ICTFBI 0:4edb816d21e1 1174 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Requesting peer address\n"));
ICTFBI 0:4edb816d21e1 1175 if (rc == CONFACK) {
ICTFBI 0:4edb816d21e1 1176 rc = CONFNAK;
ICTFBI 0:4edb816d21e1 1177 ucp = inp; /* reset pointer */
ICTFBI 0:4edb816d21e1 1178 wo->req_addr = 0; /* don't ask again */
ICTFBI 0:4edb816d21e1 1179 }
ICTFBI 0:4edb816d21e1 1180 PUTCHAR(CI_ADDR, ucp);
ICTFBI 0:4edb816d21e1 1181 PUTCHAR(CILEN_ADDR, ucp);
ICTFBI 0:4edb816d21e1 1182 tl = ntohl(wo->hisaddr);
ICTFBI 0:4edb816d21e1 1183 PUTLONG(tl, ucp);
ICTFBI 0:4edb816d21e1 1184 }
ICTFBI 0:4edb816d21e1 1185
ICTFBI 0:4edb816d21e1 1186 *len = (int)(ucp - inp); /* Compute output length */
ICTFBI 0:4edb816d21e1 1187 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: returning Configure-%s\n", CODENAME(rc)));
ICTFBI 0:4edb816d21e1 1188 return (rc); /* Return final code */
ICTFBI 0:4edb816d21e1 1189 }
ICTFBI 0:4edb816d21e1 1190
ICTFBI 0:4edb816d21e1 1191
ICTFBI 0:4edb816d21e1 1192 #if 0
ICTFBI 0:4edb816d21e1 1193 /*
ICTFBI 0:4edb816d21e1 1194 * ip_check_options - check that any IP-related options are OK,
ICTFBI 0:4edb816d21e1 1195 * and assign appropriate defaults.
ICTFBI 0:4edb816d21e1 1196 */
ICTFBI 0:4edb816d21e1 1197 static void
ICTFBI 0:4edb816d21e1 1198 ip_check_options(u_long localAddr)
ICTFBI 0:4edb816d21e1 1199 {
ICTFBI 0:4edb816d21e1 1200 ipcp_options *wo = &ipcp_wantoptions[0];
ICTFBI 0:4edb816d21e1 1201
ICTFBI 0:4edb816d21e1 1202 /*
ICTFBI 0:4edb816d21e1 1203 * Load our default IP address but allow the remote host to give us
ICTFBI 0:4edb816d21e1 1204 * a new address.
ICTFBI 0:4edb816d21e1 1205 */
ICTFBI 0:4edb816d21e1 1206 if (wo->ouraddr == 0 && !ppp_settings.disable_defaultip) {
ICTFBI 0:4edb816d21e1 1207 wo->accept_local = 1; /* don't insist on this default value */
ICTFBI 0:4edb816d21e1 1208 wo->ouraddr = htonl(localAddr);
ICTFBI 0:4edb816d21e1 1209 }
ICTFBI 0:4edb816d21e1 1210 }
ICTFBI 0:4edb816d21e1 1211 #endif
ICTFBI 0:4edb816d21e1 1212
ICTFBI 0:4edb816d21e1 1213
ICTFBI 0:4edb816d21e1 1214 /*
ICTFBI 0:4edb816d21e1 1215 * ipcp_up - IPCP has come UP.
ICTFBI 0:4edb816d21e1 1216 *
ICTFBI 0:4edb816d21e1 1217 * Configure the IP network interface appropriately and bring it up.
ICTFBI 0:4edb816d21e1 1218 */
ICTFBI 0:4edb816d21e1 1219 static void
ICTFBI 0:4edb816d21e1 1220 ipcp_up(fsm *f)
ICTFBI 0:4edb816d21e1 1221 {
ICTFBI 0:4edb816d21e1 1222 u32_t mask;
ICTFBI 0:4edb816d21e1 1223 ipcp_options *ho = &ipcp_hisoptions[f->unit];
ICTFBI 0:4edb816d21e1 1224 ipcp_options *go = &ipcp_gotoptions[f->unit];
ICTFBI 0:4edb816d21e1 1225 ipcp_options *wo = &ipcp_wantoptions[f->unit];
ICTFBI 0:4edb816d21e1 1226
ICTFBI 0:4edb816d21e1 1227 np_up(f->unit, PPP_IP);
ICTFBI 0:4edb816d21e1 1228 IPCPDEBUG(LOG_INFO, ("ipcp: up\n"));
ICTFBI 0:4edb816d21e1 1229
ICTFBI 0:4edb816d21e1 1230 /*
ICTFBI 0:4edb816d21e1 1231 * We must have a non-zero IP address for both ends of the link.
ICTFBI 0:4edb816d21e1 1232 */
ICTFBI 0:4edb816d21e1 1233 if (!ho->neg_addr) {
ICTFBI 0:4edb816d21e1 1234 ho->hisaddr = wo->hisaddr;
ICTFBI 0:4edb816d21e1 1235 }
ICTFBI 0:4edb816d21e1 1236 #ifdef __PPP_STRICT_IMPL__ //DG : Kludge for bad 3g providers PPP impl
ICTFBI 0:4edb816d21e1 1237 if (ho->hisaddr == 0) {
ICTFBI 0:4edb816d21e1 1238 IPCPDEBUG(LOG_ERR, ("Could not determine remote IP address\n"));
ICTFBI 0:4edb816d21e1 1239 ipcp_close(f->unit, "Could not determine remote IP address");
ICTFBI 0:4edb816d21e1 1240 return;
ICTFBI 0:4edb816d21e1 1241 }
ICTFBI 0:4edb816d21e1 1242 #endif
ICTFBI 0:4edb816d21e1 1243 if (go->ouraddr == 0) {
ICTFBI 0:4edb816d21e1 1244 IPCPDEBUG(LOG_ERR, ("Could not determine local IP address\n"));
ICTFBI 0:4edb816d21e1 1245 ipcp_close(f->unit, "Could not determine local IP address");
ICTFBI 0:4edb816d21e1 1246 return;
ICTFBI 0:4edb816d21e1 1247 }
ICTFBI 0:4edb816d21e1 1248
ICTFBI 0:4edb816d21e1 1249 if (ppp_settings.usepeerdns && (go->dnsaddr[0] || go->dnsaddr[1])) {
ICTFBI 0:4edb816d21e1 1250 /*pppGotDNSAddrs(go->dnsaddr[0], go->dnsaddr[1]);*/
ICTFBI 0:4edb816d21e1 1251 }
ICTFBI 0:4edb816d21e1 1252
ICTFBI 0:4edb816d21e1 1253 /*
ICTFBI 0:4edb816d21e1 1254 * Check that the peer is allowed to use the IP address it wants.
ICTFBI 0:4edb816d21e1 1255 */
ICTFBI 0:4edb816d21e1 1256 if (!auth_ip_addr(f->unit, ho->hisaddr)) {
ICTFBI 0:4edb816d21e1 1257 IPCPDEBUG(LOG_ERR, ("Peer is not authorized to use remote address %s\n",
ICTFBI 0:4edb816d21e1 1258 inet_ntoa(ho->hisaddr)));
ICTFBI 0:4edb816d21e1 1259 ipcp_close(f->unit, "Unauthorized remote IP address");
ICTFBI 0:4edb816d21e1 1260 return;
ICTFBI 0:4edb816d21e1 1261 }
ICTFBI 0:4edb816d21e1 1262
ICTFBI 0:4edb816d21e1 1263 /* set tcp compression */
ICTFBI 0:4edb816d21e1 1264 sifvjcomp(f->unit, ho->neg_vj, ho->cflag, ho->maxslotindex);
ICTFBI 0:4edb816d21e1 1265
ICTFBI 0:4edb816d21e1 1266 /*
ICTFBI 0:4edb816d21e1 1267 * Set IP addresses and (if specified) netmask.
ICTFBI 0:4edb816d21e1 1268 */
ICTFBI 0:4edb816d21e1 1269 mask = GetMask(go->ouraddr);
ICTFBI 0:4edb816d21e1 1270
ICTFBI 0:4edb816d21e1 1271 if (!sifaddr(f->unit, go->ouraddr, ho->hisaddr, mask, go->dnsaddr[0], go->dnsaddr[1])) {
ICTFBI 0:4edb816d21e1 1272 IPCPDEBUG(LOG_WARNING, ("sifaddr failed\n"));
ICTFBI 0:4edb816d21e1 1273 ipcp_close(f->unit, "Interface configuration failed");
ICTFBI 0:4edb816d21e1 1274 return;
ICTFBI 0:4edb816d21e1 1275 }
ICTFBI 0:4edb816d21e1 1276
ICTFBI 0:4edb816d21e1 1277 /* bring the interface up for IP */
ICTFBI 0:4edb816d21e1 1278 if (!sifup(f->unit)) {
ICTFBI 0:4edb816d21e1 1279 IPCPDEBUG(LOG_WARNING, ("sifup failed\n"));
ICTFBI 0:4edb816d21e1 1280 ipcp_close(f->unit, "Interface configuration failed");
ICTFBI 0:4edb816d21e1 1281 return;
ICTFBI 0:4edb816d21e1 1282 }
ICTFBI 0:4edb816d21e1 1283
ICTFBI 0:4edb816d21e1 1284 sifnpmode(f->unit, PPP_IP, NPMODE_PASS);
ICTFBI 0:4edb816d21e1 1285
ICTFBI 0:4edb816d21e1 1286 /* assign a default route through the interface if required */
ICTFBI 0:4edb816d21e1 1287 if (ipcp_wantoptions[f->unit].default_route) {
ICTFBI 0:4edb816d21e1 1288 if (sifdefaultroute(f->unit, go->ouraddr, ho->hisaddr)) {
ICTFBI 0:4edb816d21e1 1289 default_route_set[f->unit] = 1;
ICTFBI 0:4edb816d21e1 1290 }
ICTFBI 0:4edb816d21e1 1291 }
ICTFBI 0:4edb816d21e1 1292
ICTFBI 0:4edb816d21e1 1293 IPCPDEBUG(LOG_NOTICE, ("local IP address %s\n", inet_ntoa(go->ouraddr)));
ICTFBI 0:4edb816d21e1 1294 IPCPDEBUG(LOG_NOTICE, ("remote IP address %s\n", inet_ntoa(ho->hisaddr)));
ICTFBI 0:4edb816d21e1 1295 if (go->dnsaddr[0]) {
ICTFBI 0:4edb816d21e1 1296 IPCPDEBUG(LOG_NOTICE, ("primary DNS address %s\n", inet_ntoa(go->dnsaddr[0])));
ICTFBI 0:4edb816d21e1 1297 }
ICTFBI 0:4edb816d21e1 1298 if (go->dnsaddr[1]) {
ICTFBI 0:4edb816d21e1 1299 IPCPDEBUG(LOG_NOTICE, ("secondary DNS address %s\n", inet_ntoa(go->dnsaddr[1])));
ICTFBI 0:4edb816d21e1 1300 }
ICTFBI 0:4edb816d21e1 1301 }
ICTFBI 0:4edb816d21e1 1302
ICTFBI 0:4edb816d21e1 1303
ICTFBI 0:4edb816d21e1 1304 /*
ICTFBI 0:4edb816d21e1 1305 * ipcp_down - IPCP has gone DOWN.
ICTFBI 0:4edb816d21e1 1306 *
ICTFBI 0:4edb816d21e1 1307 * Take the IP network interface down, clear its addresses
ICTFBI 0:4edb816d21e1 1308 * and delete routes through it.
ICTFBI 0:4edb816d21e1 1309 */
ICTFBI 0:4edb816d21e1 1310 static void
ICTFBI 0:4edb816d21e1 1311 ipcp_down(fsm *f)
ICTFBI 0:4edb816d21e1 1312 {
ICTFBI 0:4edb816d21e1 1313 IPCPDEBUG(LOG_INFO, ("ipcp: down\n"));
ICTFBI 0:4edb816d21e1 1314 np_down(f->unit, PPP_IP);
ICTFBI 0:4edb816d21e1 1315 sifvjcomp(f->unit, 0, 0, 0);
ICTFBI 0:4edb816d21e1 1316
ICTFBI 0:4edb816d21e1 1317 sifdown(f->unit);
ICTFBI 0:4edb816d21e1 1318 ipcp_clear_addrs(f->unit);
ICTFBI 0:4edb816d21e1 1319 }
ICTFBI 0:4edb816d21e1 1320
ICTFBI 0:4edb816d21e1 1321
ICTFBI 0:4edb816d21e1 1322 /*
ICTFBI 0:4edb816d21e1 1323 * ipcp_clear_addrs() - clear the interface addresses, routes, etc.
ICTFBI 0:4edb816d21e1 1324 */
ICTFBI 0:4edb816d21e1 1325 static void
ICTFBI 0:4edb816d21e1 1326 ipcp_clear_addrs(int unit)
ICTFBI 0:4edb816d21e1 1327 {
ICTFBI 0:4edb816d21e1 1328 u32_t ouraddr, hisaddr;
ICTFBI 0:4edb816d21e1 1329
ICTFBI 0:4edb816d21e1 1330 ouraddr = ipcp_gotoptions[unit].ouraddr;
ICTFBI 0:4edb816d21e1 1331 hisaddr = ipcp_hisoptions[unit].hisaddr;
ICTFBI 0:4edb816d21e1 1332 if (default_route_set[unit]) {
ICTFBI 0:4edb816d21e1 1333 cifdefaultroute(unit, ouraddr, hisaddr);
ICTFBI 0:4edb816d21e1 1334 default_route_set[unit] = 0;
ICTFBI 0:4edb816d21e1 1335 }
ICTFBI 0:4edb816d21e1 1336 cifaddr(unit, ouraddr, hisaddr);
ICTFBI 0:4edb816d21e1 1337 }
ICTFBI 0:4edb816d21e1 1338
ICTFBI 0:4edb816d21e1 1339
ICTFBI 0:4edb816d21e1 1340 /*
ICTFBI 0:4edb816d21e1 1341 * ipcp_finished - possibly shut down the lower layers.
ICTFBI 0:4edb816d21e1 1342 */
ICTFBI 0:4edb816d21e1 1343 static void
ICTFBI 0:4edb816d21e1 1344 ipcp_finished(fsm *f)
ICTFBI 0:4edb816d21e1 1345 {
ICTFBI 0:4edb816d21e1 1346 np_finished(f->unit, PPP_IP);
ICTFBI 0:4edb816d21e1 1347 }
ICTFBI 0:4edb816d21e1 1348
ICTFBI 0:4edb816d21e1 1349 #if PPP_ADDITIONAL_CALLBACKS
ICTFBI 0:4edb816d21e1 1350 static int
ICTFBI 0:4edb816d21e1 1351 ipcp_printpkt(u_char *p, int plen, void (*printer) (void *, char *, ...), void *arg)
ICTFBI 0:4edb816d21e1 1352 {
ICTFBI 0:4edb816d21e1 1353 LWIP_UNUSED_ARG(p);
ICTFBI 0:4edb816d21e1 1354 LWIP_UNUSED_ARG(plen);
ICTFBI 0:4edb816d21e1 1355 LWIP_UNUSED_ARG(printer);
ICTFBI 0:4edb816d21e1 1356 LWIP_UNUSED_ARG(arg);
ICTFBI 0:4edb816d21e1 1357 return 0;
ICTFBI 0:4edb816d21e1 1358 }
ICTFBI 0:4edb816d21e1 1359
ICTFBI 0:4edb816d21e1 1360 /*
ICTFBI 0:4edb816d21e1 1361 * ip_active_pkt - see if this IP packet is worth bringing the link up for.
ICTFBI 0:4edb816d21e1 1362 * We don't bring the link up for IP fragments or for TCP FIN packets
ICTFBI 0:4edb816d21e1 1363 * with no data.
ICTFBI 0:4edb816d21e1 1364 */
ICTFBI 0:4edb816d21e1 1365 #define IP_HDRLEN 20 /* bytes */
ICTFBI 0:4edb816d21e1 1366 #define IP_OFFMASK 0x1fff
ICTFBI 0:4edb816d21e1 1367 #define IPPROTO_TCP 6
ICTFBI 0:4edb816d21e1 1368 #define TCP_HDRLEN 20
ICTFBI 0:4edb816d21e1 1369 #define TH_FIN 0x01
ICTFBI 0:4edb816d21e1 1370
ICTFBI 0:4edb816d21e1 1371 /*
ICTFBI 0:4edb816d21e1 1372 * We use these macros because the IP header may be at an odd address,
ICTFBI 0:4edb816d21e1 1373 * and some compilers might use word loads to get th_off or ip_hl.
ICTFBI 0:4edb816d21e1 1374 */
ICTFBI 0:4edb816d21e1 1375
ICTFBI 0:4edb816d21e1 1376 #define net_short(x) (((x)[0] << 8) + (x)[1])
ICTFBI 0:4edb816d21e1 1377 #define get_iphl(x) (((unsigned char *)(x))[0] & 0xF)
ICTFBI 0:4edb816d21e1 1378 #define get_ipoff(x) net_short((unsigned char *)(x) + 6)
ICTFBI 0:4edb816d21e1 1379 #define get_ipproto(x) (((unsigned char *)(x))[9])
ICTFBI 0:4edb816d21e1 1380 #define get_tcpoff(x) (((unsigned char *)(x))[12] >> 4)
ICTFBI 0:4edb816d21e1 1381 #define get_tcpflags(x) (((unsigned char *)(x))[13])
ICTFBI 0:4edb816d21e1 1382
ICTFBI 0:4edb816d21e1 1383 static int
ICTFBI 0:4edb816d21e1 1384 ip_active_pkt(u_char *pkt, int len)
ICTFBI 0:4edb816d21e1 1385 {
ICTFBI 0:4edb816d21e1 1386 u_char *tcp;
ICTFBI 0:4edb816d21e1 1387 int hlen;
ICTFBI 0:4edb816d21e1 1388
ICTFBI 0:4edb816d21e1 1389 len -= PPP_HDRLEN;
ICTFBI 0:4edb816d21e1 1390 pkt += PPP_HDRLEN;
ICTFBI 0:4edb816d21e1 1391 if (len < IP_HDRLEN) {
ICTFBI 0:4edb816d21e1 1392 return 0;
ICTFBI 0:4edb816d21e1 1393 }
ICTFBI 0:4edb816d21e1 1394 if ((get_ipoff(pkt) & IP_OFFMASK) != 0) {
ICTFBI 0:4edb816d21e1 1395 return 0;
ICTFBI 0:4edb816d21e1 1396 }
ICTFBI 0:4edb816d21e1 1397 if (get_ipproto(pkt) != IPPROTO_TCP) {
ICTFBI 0:4edb816d21e1 1398 return 1;
ICTFBI 0:4edb816d21e1 1399 }
ICTFBI 0:4edb816d21e1 1400 hlen = get_iphl(pkt) * 4;
ICTFBI 0:4edb816d21e1 1401 if (len < hlen + TCP_HDRLEN) {
ICTFBI 0:4edb816d21e1 1402 return 0;
ICTFBI 0:4edb816d21e1 1403 }
ICTFBI 0:4edb816d21e1 1404 tcp = pkt + hlen;
ICTFBI 0:4edb816d21e1 1405 if ((get_tcpflags(tcp) & TH_FIN) != 0 && len == hlen + get_tcpoff(tcp) * 4) {
ICTFBI 0:4edb816d21e1 1406 return 0;
ICTFBI 0:4edb816d21e1 1407 }
ICTFBI 0:4edb816d21e1 1408 return 1;
ICTFBI 0:4edb816d21e1 1409 }
ICTFBI 0:4edb816d21e1 1410 #endif /* PPP_ADDITIONAL_CALLBACKS */
ICTFBI 0:4edb816d21e1 1411
ICTFBI 0:4edb816d21e1 1412 #endif /* PPP_SUPPORT */