Mauricio Donatti / lwip

Modification to work two socket servers at the same time

Fork of lwip by mbed official

netif/ppp/ipcp.c@0:51ac1d130fd4, 2012-06-22 (annotated)

Committer:
mbed_official
Date:
Fri Jun 22 09:25:39 2012 +0000
Revision:
0:51ac1d130fd4
Child:
4:f71f5d9d5846
Initial import from lwip-1.4.0: http://download.savannah.gnu.org/releases/lwip/lwip-1.4.0.zip

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 0:51ac1d130fd4 1 /** In contrast to pppd 2.3.1, DNS support has been added, proxy-ARP and
mbed_official 0:51ac1d130fd4 2 dial-on-demand has been stripped. */
mbed_official 0:51ac1d130fd4 3 /*****************************************************************************
mbed_official 0:51ac1d130fd4 4 * ipcp.c - Network PPP IP Control Protocol program file.
mbed_official 0:51ac1d130fd4 5 *
mbed_official 0:51ac1d130fd4 6 * Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
mbed_official 0:51ac1d130fd4 7 * portions Copyright (c) 1997 by Global Election Systems Inc.
mbed_official 0:51ac1d130fd4 8 *
mbed_official 0:51ac1d130fd4 9 * The authors hereby grant permission to use, copy, modify, distribute,
mbed_official 0:51ac1d130fd4 10 * and license this software and its documentation for any purpose, provided
mbed_official 0:51ac1d130fd4 11 * that existing copyright notices are retained in all copies and that this
mbed_official 0:51ac1d130fd4 12 * notice and the following disclaimer are included verbatim in any
mbed_official 0:51ac1d130fd4 13 * distributions. No written agreement, license, or royalty fee is required
mbed_official 0:51ac1d130fd4 14 * for any of the authorized uses.
mbed_official 0:51ac1d130fd4 15 *
mbed_official 0:51ac1d130fd4 16 * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
mbed_official 0:51ac1d130fd4 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
mbed_official 0:51ac1d130fd4 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
mbed_official 0:51ac1d130fd4 19 * IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
mbed_official 0:51ac1d130fd4 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
mbed_official 0:51ac1d130fd4 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
mbed_official 0:51ac1d130fd4 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
mbed_official 0:51ac1d130fd4 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
mbed_official 0:51ac1d130fd4 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
mbed_official 0:51ac1d130fd4 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 0:51ac1d130fd4 26 *
mbed_official 0:51ac1d130fd4 27 ******************************************************************************
mbed_official 0:51ac1d130fd4 28 * REVISION HISTORY
mbed_official 0:51ac1d130fd4 29 *
mbed_official 0:51ac1d130fd4 30 * 03-01-01 Marc Boucher <marc@mbsi.ca>
mbed_official 0:51ac1d130fd4 31 * Ported to lwIP.
mbed_official 0:51ac1d130fd4 32 * 97-12-08 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
mbed_official 0:51ac1d130fd4 33 * Original.
mbed_official 0:51ac1d130fd4 34 *****************************************************************************/
mbed_official 0:51ac1d130fd4 35 /*
mbed_official 0:51ac1d130fd4 36 * ipcp.c - PPP IP Control Protocol.
mbed_official 0:51ac1d130fd4 37 *
mbed_official 0:51ac1d130fd4 38 * Copyright (c) 1989 Carnegie Mellon University.
mbed_official 0:51ac1d130fd4 39 * All rights reserved.
mbed_official 0:51ac1d130fd4 40 *
mbed_official 0:51ac1d130fd4 41 * Redistribution and use in source and binary forms are permitted
mbed_official 0:51ac1d130fd4 42 * provided that the above copyright notice and this paragraph are
mbed_official 0:51ac1d130fd4 43 * duplicated in all such forms and that any documentation,
mbed_official 0:51ac1d130fd4 44 * advertising materials, and other materials related to such
mbed_official 0:51ac1d130fd4 45 * distribution and use acknowledge that the software was developed
mbed_official 0:51ac1d130fd4 46 * by Carnegie Mellon University. The name of the
mbed_official 0:51ac1d130fd4 47 * University may not be used to endorse or promote products derived
mbed_official 0:51ac1d130fd4 48 * from this software without specific prior written permission.
mbed_official 0:51ac1d130fd4 49 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
mbed_official 0:51ac1d130fd4 50 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
mbed_official 0:51ac1d130fd4 51 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
mbed_official 0:51ac1d130fd4 52 */
mbed_official 0:51ac1d130fd4 53
mbed_official 0:51ac1d130fd4 54 #include "lwip/opt.h"
mbed_official 0:51ac1d130fd4 55
mbed_official 0:51ac1d130fd4 56 #if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
mbed_official 0:51ac1d130fd4 57
mbed_official 0:51ac1d130fd4 58 #include "ppp.h"
mbed_official 0:51ac1d130fd4 59 #include "pppdebug.h"
mbed_official 0:51ac1d130fd4 60
mbed_official 0:51ac1d130fd4 61 #include "auth.h"
mbed_official 0:51ac1d130fd4 62 #include "fsm.h"
mbed_official 0:51ac1d130fd4 63 #include "vj.h"
mbed_official 0:51ac1d130fd4 64 #include "ipcp.h"
mbed_official 0:51ac1d130fd4 65
mbed_official 0:51ac1d130fd4 66 #include "lwip/inet.h"
mbed_official 0:51ac1d130fd4 67
mbed_official 0:51ac1d130fd4 68 #include <string.h>
mbed_official 0:51ac1d130fd4 69
mbed_official 0:51ac1d130fd4 70 /* #define OLD_CI_ADDRS 1 */ /* Support deprecated address negotiation. */
mbed_official 0:51ac1d130fd4 71
mbed_official 0:51ac1d130fd4 72 /* global vars */
mbed_official 0:51ac1d130fd4 73 ipcp_options ipcp_wantoptions[NUM_PPP]; /* Options that we want to request */
mbed_official 0:51ac1d130fd4 74 ipcp_options ipcp_gotoptions[NUM_PPP]; /* Options that peer ack'd */
mbed_official 0:51ac1d130fd4 75 ipcp_options ipcp_allowoptions[NUM_PPP]; /* Options we allow peer to request */
mbed_official 0:51ac1d130fd4 76 ipcp_options ipcp_hisoptions[NUM_PPP]; /* Options that we ack'd */
mbed_official 0:51ac1d130fd4 77
mbed_official 0:51ac1d130fd4 78 /* local vars */
mbed_official 0:51ac1d130fd4 79 static int default_route_set[NUM_PPP]; /* Have set up a default route */
mbed_official 0:51ac1d130fd4 80 static int cis_received[NUM_PPP]; /* # Conf-Reqs received */
mbed_official 0:51ac1d130fd4 81
mbed_official 0:51ac1d130fd4 82
mbed_official 0:51ac1d130fd4 83 /*
mbed_official 0:51ac1d130fd4 84 * Callbacks for fsm code. (CI = Configuration Information)
mbed_official 0:51ac1d130fd4 85 */
mbed_official 0:51ac1d130fd4 86 static void ipcp_resetci (fsm *); /* Reset our CI */
mbed_official 0:51ac1d130fd4 87 static int ipcp_cilen (fsm *); /* Return length of our CI */
mbed_official 0:51ac1d130fd4 88 static void ipcp_addci (fsm *, u_char *, int *); /* Add our CI */
mbed_official 0:51ac1d130fd4 89 static int ipcp_ackci (fsm *, u_char *, int); /* Peer ack'd our CI */
mbed_official 0:51ac1d130fd4 90 static int ipcp_nakci (fsm *, u_char *, int); /* Peer nak'd our CI */
mbed_official 0:51ac1d130fd4 91 static int ipcp_rejci (fsm *, u_char *, int); /* Peer rej'd our CI */
mbed_official 0:51ac1d130fd4 92 static int ipcp_reqci (fsm *, u_char *, int *, int); /* Rcv CI */
mbed_official 0:51ac1d130fd4 93 static void ipcp_up (fsm *); /* We're UP */
mbed_official 0:51ac1d130fd4 94 static void ipcp_down (fsm *); /* We're DOWN */
mbed_official 0:51ac1d130fd4 95 #if PPP_ADDITIONAL_CALLBACKS
mbed_official 0:51ac1d130fd4 96 static void ipcp_script (fsm *, char *); /* Run an up/down script */
mbed_official 0:51ac1d130fd4 97 #endif
mbed_official 0:51ac1d130fd4 98 static void ipcp_finished (fsm *); /* Don't need lower layer */
mbed_official 0:51ac1d130fd4 99
mbed_official 0:51ac1d130fd4 100
mbed_official 0:51ac1d130fd4 101 fsm ipcp_fsm[NUM_PPP]; /* IPCP fsm structure */
mbed_official 0:51ac1d130fd4 102
mbed_official 0:51ac1d130fd4 103
mbed_official 0:51ac1d130fd4 104 static fsm_callbacks ipcp_callbacks = { /* IPCP callback routines */
mbed_official 0:51ac1d130fd4 105 ipcp_resetci, /* Reset our Configuration Information */
mbed_official 0:51ac1d130fd4 106 ipcp_cilen, /* Length of our Configuration Information */
mbed_official 0:51ac1d130fd4 107 ipcp_addci, /* Add our Configuration Information */
mbed_official 0:51ac1d130fd4 108 ipcp_ackci, /* ACK our Configuration Information */
mbed_official 0:51ac1d130fd4 109 ipcp_nakci, /* NAK our Configuration Information */
mbed_official 0:51ac1d130fd4 110 ipcp_rejci, /* Reject our Configuration Information */
mbed_official 0:51ac1d130fd4 111 ipcp_reqci, /* Request peer's Configuration Information */
mbed_official 0:51ac1d130fd4 112 ipcp_up, /* Called when fsm reaches LS_OPENED state */
mbed_official 0:51ac1d130fd4 113 ipcp_down, /* Called when fsm leaves LS_OPENED state */
mbed_official 0:51ac1d130fd4 114 NULL, /* Called when we want the lower layer up */
mbed_official 0:51ac1d130fd4 115 ipcp_finished, /* Called when we want the lower layer down */
mbed_official 0:51ac1d130fd4 116 NULL, /* Called when Protocol-Reject received */
mbed_official 0:51ac1d130fd4 117 NULL, /* Retransmission is necessary */
mbed_official 0:51ac1d130fd4 118 NULL, /* Called to handle protocol-specific codes */
mbed_official 0:51ac1d130fd4 119 "IPCP" /* String name of protocol */
mbed_official 0:51ac1d130fd4 120 };
mbed_official 0:51ac1d130fd4 121
mbed_official 0:51ac1d130fd4 122 /*
mbed_official 0:51ac1d130fd4 123 * Protocol entry points from main code.
mbed_official 0:51ac1d130fd4 124 */
mbed_official 0:51ac1d130fd4 125 static void ipcp_init (int);
mbed_official 0:51ac1d130fd4 126 static void ipcp_open (int);
mbed_official 0:51ac1d130fd4 127 static void ipcp_close (int, char *);
mbed_official 0:51ac1d130fd4 128 static void ipcp_lowerup (int);
mbed_official 0:51ac1d130fd4 129 static void ipcp_lowerdown (int);
mbed_official 0:51ac1d130fd4 130 static void ipcp_input (int, u_char *, int);
mbed_official 0:51ac1d130fd4 131 static void ipcp_protrej (int);
mbed_official 0:51ac1d130fd4 132
mbed_official 0:51ac1d130fd4 133
mbed_official 0:51ac1d130fd4 134 struct protent ipcp_protent = {
mbed_official 0:51ac1d130fd4 135 PPP_IPCP,
mbed_official 0:51ac1d130fd4 136 ipcp_init,
mbed_official 0:51ac1d130fd4 137 ipcp_input,
mbed_official 0:51ac1d130fd4 138 ipcp_protrej,
mbed_official 0:51ac1d130fd4 139 ipcp_lowerup,
mbed_official 0:51ac1d130fd4 140 ipcp_lowerdown,
mbed_official 0:51ac1d130fd4 141 ipcp_open,
mbed_official 0:51ac1d130fd4 142 ipcp_close,
mbed_official 0:51ac1d130fd4 143 #if PPP_ADDITIONAL_CALLBACKS
mbed_official 0:51ac1d130fd4 144 ipcp_printpkt,
mbed_official 0:51ac1d130fd4 145 NULL,
mbed_official 0:51ac1d130fd4 146 #endif /* PPP_ADDITIONAL_CALLBACKS */
mbed_official 0:51ac1d130fd4 147 1,
mbed_official 0:51ac1d130fd4 148 "IPCP",
mbed_official 0:51ac1d130fd4 149 #if PPP_ADDITIONAL_CALLBACKS
mbed_official 0:51ac1d130fd4 150 ip_check_options,
mbed_official 0:51ac1d130fd4 151 NULL,
mbed_official 0:51ac1d130fd4 152 ip_active_pkt
mbed_official 0:51ac1d130fd4 153 #endif /* PPP_ADDITIONAL_CALLBACKS */
mbed_official 0:51ac1d130fd4 154 };
mbed_official 0:51ac1d130fd4 155
mbed_official 0:51ac1d130fd4 156 static void ipcp_clear_addrs (int);
mbed_official 0:51ac1d130fd4 157
mbed_official 0:51ac1d130fd4 158 /*
mbed_official 0:51ac1d130fd4 159 * Lengths of configuration options.
mbed_official 0:51ac1d130fd4 160 */
mbed_official 0:51ac1d130fd4 161 #define CILEN_VOID 2
mbed_official 0:51ac1d130fd4 162 #define CILEN_COMPRESS 4 /* min length for compression protocol opt. */
mbed_official 0:51ac1d130fd4 163 #define CILEN_VJ 6 /* length for RFC1332 Van-Jacobson opt. */
mbed_official 0:51ac1d130fd4 164 #define CILEN_ADDR 6 /* new-style single address option */
mbed_official 0:51ac1d130fd4 165 #define CILEN_ADDRS 10 /* old-style dual address option */
mbed_official 0:51ac1d130fd4 166
mbed_official 0:51ac1d130fd4 167
mbed_official 0:51ac1d130fd4 168 #define CODENAME(x) ((x) == CONFACK ? "ACK" : \
mbed_official 0:51ac1d130fd4 169 (x) == CONFNAK ? "NAK" : "REJ")
mbed_official 0:51ac1d130fd4 170
mbed_official 0:51ac1d130fd4 171
mbed_official 0:51ac1d130fd4 172 /*
mbed_official 0:51ac1d130fd4 173 * ipcp_init - Initialize IPCP.
mbed_official 0:51ac1d130fd4 174 */
mbed_official 0:51ac1d130fd4 175 static void
mbed_official 0:51ac1d130fd4 176 ipcp_init(int unit)
mbed_official 0:51ac1d130fd4 177 {
mbed_official 0:51ac1d130fd4 178 fsm *f = &ipcp_fsm[unit];
mbed_official 0:51ac1d130fd4 179 ipcp_options *wo = &ipcp_wantoptions[unit];
mbed_official 0:51ac1d130fd4 180 ipcp_options *ao = &ipcp_allowoptions[unit];
mbed_official 0:51ac1d130fd4 181
mbed_official 0:51ac1d130fd4 182 f->unit = unit;
mbed_official 0:51ac1d130fd4 183 f->protocol = PPP_IPCP;
mbed_official 0:51ac1d130fd4 184 f->callbacks = &ipcp_callbacks;
mbed_official 0:51ac1d130fd4 185 fsm_init(&ipcp_fsm[unit]);
mbed_official 0:51ac1d130fd4 186
mbed_official 0:51ac1d130fd4 187 memset(wo, 0, sizeof(*wo));
mbed_official 0:51ac1d130fd4 188 memset(ao, 0, sizeof(*ao));
mbed_official 0:51ac1d130fd4 189
mbed_official 0:51ac1d130fd4 190 wo->neg_addr = 1;
mbed_official 0:51ac1d130fd4 191 wo->ouraddr = 0;
mbed_official 0:51ac1d130fd4 192 #if VJ_SUPPORT
mbed_official 0:51ac1d130fd4 193 wo->neg_vj = 1;
mbed_official 0:51ac1d130fd4 194 #else /* VJ_SUPPORT */
mbed_official 0:51ac1d130fd4 195 wo->neg_vj = 0;
mbed_official 0:51ac1d130fd4 196 #endif /* VJ_SUPPORT */
mbed_official 0:51ac1d130fd4 197 wo->vj_protocol = IPCP_VJ_COMP;
mbed_official 0:51ac1d130fd4 198 wo->maxslotindex = MAX_SLOTS - 1;
mbed_official 0:51ac1d130fd4 199 wo->cflag = 0;
mbed_official 0:51ac1d130fd4 200 wo->default_route = 1;
mbed_official 0:51ac1d130fd4 201
mbed_official 0:51ac1d130fd4 202 ao->neg_addr = 1;
mbed_official 0:51ac1d130fd4 203 #if VJ_SUPPORT
mbed_official 0:51ac1d130fd4 204 ao->neg_vj = 1;
mbed_official 0:51ac1d130fd4 205 #else /* VJ_SUPPORT */
mbed_official 0:51ac1d130fd4 206 ao->neg_vj = 0;
mbed_official 0:51ac1d130fd4 207 #endif /* VJ_SUPPORT */
mbed_official 0:51ac1d130fd4 208 ao->maxslotindex = MAX_SLOTS - 1;
mbed_official 0:51ac1d130fd4 209 ao->cflag = 1;
mbed_official 0:51ac1d130fd4 210 ao->default_route = 1;
mbed_official 0:51ac1d130fd4 211 }
mbed_official 0:51ac1d130fd4 212
mbed_official 0:51ac1d130fd4 213
mbed_official 0:51ac1d130fd4 214 /*
mbed_official 0:51ac1d130fd4 215 * ipcp_open - IPCP is allowed to come up.
mbed_official 0:51ac1d130fd4 216 */
mbed_official 0:51ac1d130fd4 217 static void
mbed_official 0:51ac1d130fd4 218 ipcp_open(int unit)
mbed_official 0:51ac1d130fd4 219 {
mbed_official 0:51ac1d130fd4 220 fsm_open(&ipcp_fsm[unit]);
mbed_official 0:51ac1d130fd4 221 }
mbed_official 0:51ac1d130fd4 222
mbed_official 0:51ac1d130fd4 223
mbed_official 0:51ac1d130fd4 224 /*
mbed_official 0:51ac1d130fd4 225 * ipcp_close - Take IPCP down.
mbed_official 0:51ac1d130fd4 226 */
mbed_official 0:51ac1d130fd4 227 static void
mbed_official 0:51ac1d130fd4 228 ipcp_close(int unit, char *reason)
mbed_official 0:51ac1d130fd4 229 {
mbed_official 0:51ac1d130fd4 230 fsm_close(&ipcp_fsm[unit], reason);
mbed_official 0:51ac1d130fd4 231 }
mbed_official 0:51ac1d130fd4 232
mbed_official 0:51ac1d130fd4 233
mbed_official 0:51ac1d130fd4 234 /*
mbed_official 0:51ac1d130fd4 235 * ipcp_lowerup - The lower layer is up.
mbed_official 0:51ac1d130fd4 236 */
mbed_official 0:51ac1d130fd4 237 static void
mbed_official 0:51ac1d130fd4 238 ipcp_lowerup(int unit)
mbed_official 0:51ac1d130fd4 239 {
mbed_official 0:51ac1d130fd4 240 fsm_lowerup(&ipcp_fsm[unit]);
mbed_official 0:51ac1d130fd4 241 }
mbed_official 0:51ac1d130fd4 242
mbed_official 0:51ac1d130fd4 243
mbed_official 0:51ac1d130fd4 244 /*
mbed_official 0:51ac1d130fd4 245 * ipcp_lowerdown - The lower layer is down.
mbed_official 0:51ac1d130fd4 246 */
mbed_official 0:51ac1d130fd4 247 static void
mbed_official 0:51ac1d130fd4 248 ipcp_lowerdown(int unit)
mbed_official 0:51ac1d130fd4 249 {
mbed_official 0:51ac1d130fd4 250 fsm_lowerdown(&ipcp_fsm[unit]);
mbed_official 0:51ac1d130fd4 251 }
mbed_official 0:51ac1d130fd4 252
mbed_official 0:51ac1d130fd4 253
mbed_official 0:51ac1d130fd4 254 /*
mbed_official 0:51ac1d130fd4 255 * ipcp_input - Input IPCP packet.
mbed_official 0:51ac1d130fd4 256 */
mbed_official 0:51ac1d130fd4 257 static void
mbed_official 0:51ac1d130fd4 258 ipcp_input(int unit, u_char *p, int len)
mbed_official 0:51ac1d130fd4 259 {
mbed_official 0:51ac1d130fd4 260 fsm_input(&ipcp_fsm[unit], p, len);
mbed_official 0:51ac1d130fd4 261 }
mbed_official 0:51ac1d130fd4 262
mbed_official 0:51ac1d130fd4 263
mbed_official 0:51ac1d130fd4 264 /*
mbed_official 0:51ac1d130fd4 265 * ipcp_protrej - A Protocol-Reject was received for IPCP.
mbed_official 0:51ac1d130fd4 266 *
mbed_official 0:51ac1d130fd4 267 * Pretend the lower layer went down, so we shut up.
mbed_official 0:51ac1d130fd4 268 */
mbed_official 0:51ac1d130fd4 269 static void
mbed_official 0:51ac1d130fd4 270 ipcp_protrej(int unit)
mbed_official 0:51ac1d130fd4 271 {
mbed_official 0:51ac1d130fd4 272 fsm_lowerdown(&ipcp_fsm[unit]);
mbed_official 0:51ac1d130fd4 273 }
mbed_official 0:51ac1d130fd4 274
mbed_official 0:51ac1d130fd4 275
mbed_official 0:51ac1d130fd4 276 /*
mbed_official 0:51ac1d130fd4 277 * ipcp_resetci - Reset our CI.
mbed_official 0:51ac1d130fd4 278 */
mbed_official 0:51ac1d130fd4 279 static void
mbed_official 0:51ac1d130fd4 280 ipcp_resetci(fsm *f)
mbed_official 0:51ac1d130fd4 281 {
mbed_official 0:51ac1d130fd4 282 ipcp_options *wo = &ipcp_wantoptions[f->unit];
mbed_official 0:51ac1d130fd4 283
mbed_official 0:51ac1d130fd4 284 wo->req_addr = wo->neg_addr && ipcp_allowoptions[f->unit].neg_addr;
mbed_official 0:51ac1d130fd4 285 if (wo->ouraddr == 0) {
mbed_official 0:51ac1d130fd4 286 wo->accept_local = 1;
mbed_official 0:51ac1d130fd4 287 }
mbed_official 0:51ac1d130fd4 288 if (wo->hisaddr == 0) {
mbed_official 0:51ac1d130fd4 289 wo->accept_remote = 1;
mbed_official 0:51ac1d130fd4 290 }
mbed_official 0:51ac1d130fd4 291 /* Request DNS addresses from the peer */
mbed_official 0:51ac1d130fd4 292 wo->req_dns1 = ppp_settings.usepeerdns;
mbed_official 0:51ac1d130fd4 293 wo->req_dns2 = ppp_settings.usepeerdns;
mbed_official 0:51ac1d130fd4 294 ipcp_gotoptions[f->unit] = *wo;
mbed_official 0:51ac1d130fd4 295 cis_received[f->unit] = 0;
mbed_official 0:51ac1d130fd4 296 }
mbed_official 0:51ac1d130fd4 297
mbed_official 0:51ac1d130fd4 298
mbed_official 0:51ac1d130fd4 299 /*
mbed_official 0:51ac1d130fd4 300 * ipcp_cilen - Return length of our CI.
mbed_official 0:51ac1d130fd4 301 */
mbed_official 0:51ac1d130fd4 302 static int
mbed_official 0:51ac1d130fd4 303 ipcp_cilen(fsm *f)
mbed_official 0:51ac1d130fd4 304 {
mbed_official 0:51ac1d130fd4 305 ipcp_options *go = &ipcp_gotoptions[f->unit];
mbed_official 0:51ac1d130fd4 306 ipcp_options *wo = &ipcp_wantoptions[f->unit];
mbed_official 0:51ac1d130fd4 307 ipcp_options *ho = &ipcp_hisoptions[f->unit];
mbed_official 0:51ac1d130fd4 308
mbed_official 0:51ac1d130fd4 309 #define LENCIVJ(neg, old) (neg ? (old? CILEN_COMPRESS : CILEN_VJ) : 0)
mbed_official 0:51ac1d130fd4 310 #define LENCIADDR(neg, old) (neg ? (old? CILEN_ADDRS : CILEN_ADDR) : 0)
mbed_official 0:51ac1d130fd4 311 #define LENCIDNS(neg) (neg ? (CILEN_ADDR) : 0)
mbed_official 0:51ac1d130fd4 312
mbed_official 0:51ac1d130fd4 313 /*
mbed_official 0:51ac1d130fd4 314 * First see if we want to change our options to the old
mbed_official 0:51ac1d130fd4 315 * forms because we have received old forms from the peer.
mbed_official 0:51ac1d130fd4 316 */
mbed_official 0:51ac1d130fd4 317 if (wo->neg_addr && !go->neg_addr && !go->old_addrs) {
mbed_official 0:51ac1d130fd4 318 /* use the old style of address negotiation */
mbed_official 0:51ac1d130fd4 319 go->neg_addr = 1;
mbed_official 0:51ac1d130fd4 320 go->old_addrs = 1;
mbed_official 0:51ac1d130fd4 321 }
mbed_official 0:51ac1d130fd4 322 if (wo->neg_vj && !go->neg_vj && !go->old_vj) {
mbed_official 0:51ac1d130fd4 323 /* try an older style of VJ negotiation */
mbed_official 0:51ac1d130fd4 324 if (cis_received[f->unit] == 0) {
mbed_official 0:51ac1d130fd4 325 /* keep trying the new style until we see some CI from the peer */
mbed_official 0:51ac1d130fd4 326 go->neg_vj = 1;
mbed_official 0:51ac1d130fd4 327 } else {
mbed_official 0:51ac1d130fd4 328 /* use the old style only if the peer did */
mbed_official 0:51ac1d130fd4 329 if (ho->neg_vj && ho->old_vj) {
mbed_official 0:51ac1d130fd4 330 go->neg_vj = 1;
mbed_official 0:51ac1d130fd4 331 go->old_vj = 1;
mbed_official 0:51ac1d130fd4 332 go->vj_protocol = ho->vj_protocol;
mbed_official 0:51ac1d130fd4 333 }
mbed_official 0:51ac1d130fd4 334 }
mbed_official 0:51ac1d130fd4 335 }
mbed_official 0:51ac1d130fd4 336
mbed_official 0:51ac1d130fd4 337 return (LENCIADDR(go->neg_addr, go->old_addrs) +
mbed_official 0:51ac1d130fd4 338 LENCIVJ(go->neg_vj, go->old_vj) +
mbed_official 0:51ac1d130fd4 339 LENCIDNS(go->req_dns1) +
mbed_official 0:51ac1d130fd4 340 LENCIDNS(go->req_dns2));
mbed_official 0:51ac1d130fd4 341 }
mbed_official 0:51ac1d130fd4 342
mbed_official 0:51ac1d130fd4 343
mbed_official 0:51ac1d130fd4 344 /*
mbed_official 0:51ac1d130fd4 345 * ipcp_addci - Add our desired CIs to a packet.
mbed_official 0:51ac1d130fd4 346 */
mbed_official 0:51ac1d130fd4 347 static void
mbed_official 0:51ac1d130fd4 348 ipcp_addci(fsm *f, u_char *ucp, int *lenp)
mbed_official 0:51ac1d130fd4 349 {
mbed_official 0:51ac1d130fd4 350 ipcp_options *go = &ipcp_gotoptions[f->unit];
mbed_official 0:51ac1d130fd4 351 int len = *lenp;
mbed_official 0:51ac1d130fd4 352
mbed_official 0:51ac1d130fd4 353 #define ADDCIVJ(opt, neg, val, old, maxslotindex, cflag) \
mbed_official 0:51ac1d130fd4 354 if (neg) { \
mbed_official 0:51ac1d130fd4 355 int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \
mbed_official 0:51ac1d130fd4 356 if (len >= vjlen) { \
mbed_official 0:51ac1d130fd4 357 PUTCHAR(opt, ucp); \
mbed_official 0:51ac1d130fd4 358 PUTCHAR(vjlen, ucp); \
mbed_official 0:51ac1d130fd4 359 PUTSHORT(val, ucp); \
mbed_official 0:51ac1d130fd4 360 if (!old) { \
mbed_official 0:51ac1d130fd4 361 PUTCHAR(maxslotindex, ucp); \
mbed_official 0:51ac1d130fd4 362 PUTCHAR(cflag, ucp); \
mbed_official 0:51ac1d130fd4 363 } \
mbed_official 0:51ac1d130fd4 364 len -= vjlen; \
mbed_official 0:51ac1d130fd4 365 } else { \
mbed_official 0:51ac1d130fd4 366 neg = 0; \
mbed_official 0:51ac1d130fd4 367 } \
mbed_official 0:51ac1d130fd4 368 }
mbed_official 0:51ac1d130fd4 369
mbed_official 0:51ac1d130fd4 370 #define ADDCIADDR(opt, neg, old, val1, val2) \
mbed_official 0:51ac1d130fd4 371 if (neg) { \
mbed_official 0:51ac1d130fd4 372 int addrlen = (old? CILEN_ADDRS: CILEN_ADDR); \
mbed_official 0:51ac1d130fd4 373 if (len >= addrlen) { \
mbed_official 0:51ac1d130fd4 374 u32_t l; \
mbed_official 0:51ac1d130fd4 375 PUTCHAR(opt, ucp); \
mbed_official 0:51ac1d130fd4 376 PUTCHAR(addrlen, ucp); \
mbed_official 0:51ac1d130fd4 377 l = ntohl(val1); \
mbed_official 0:51ac1d130fd4 378 PUTLONG(l, ucp); \
mbed_official 0:51ac1d130fd4 379 if (old) { \
mbed_official 0:51ac1d130fd4 380 l = ntohl(val2); \
mbed_official 0:51ac1d130fd4 381 PUTLONG(l, ucp); \
mbed_official 0:51ac1d130fd4 382 } \
mbed_official 0:51ac1d130fd4 383 len -= addrlen; \
mbed_official 0:51ac1d130fd4 384 } else { \
mbed_official 0:51ac1d130fd4 385 neg = 0; \
mbed_official 0:51ac1d130fd4 386 } \
mbed_official 0:51ac1d130fd4 387 }
mbed_official 0:51ac1d130fd4 388
mbed_official 0:51ac1d130fd4 389 #define ADDCIDNS(opt, neg, addr) \
mbed_official 0:51ac1d130fd4 390 if (neg) { \
mbed_official 0:51ac1d130fd4 391 if (len >= CILEN_ADDR) { \
mbed_official 0:51ac1d130fd4 392 u32_t l; \
mbed_official 0:51ac1d130fd4 393 PUTCHAR(opt, ucp); \
mbed_official 0:51ac1d130fd4 394 PUTCHAR(CILEN_ADDR, ucp); \
mbed_official 0:51ac1d130fd4 395 l = ntohl(addr); \
mbed_official 0:51ac1d130fd4 396 PUTLONG(l, ucp); \
mbed_official 0:51ac1d130fd4 397 len -= CILEN_ADDR; \
mbed_official 0:51ac1d130fd4 398 } else { \
mbed_official 0:51ac1d130fd4 399 neg = 0; \
mbed_official 0:51ac1d130fd4 400 } \
mbed_official 0:51ac1d130fd4 401 }
mbed_official 0:51ac1d130fd4 402
mbed_official 0:51ac1d130fd4 403 ADDCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), go->neg_addr,
mbed_official 0:51ac1d130fd4 404 go->old_addrs, go->ouraddr, go->hisaddr);
mbed_official 0:51ac1d130fd4 405
mbed_official 0:51ac1d130fd4 406 ADDCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj,
mbed_official 0:51ac1d130fd4 407 go->maxslotindex, go->cflag);
mbed_official 0:51ac1d130fd4 408
mbed_official 0:51ac1d130fd4 409 ADDCIDNS(CI_MS_DNS1, go->req_dns1, go->dnsaddr[0]);
mbed_official 0:51ac1d130fd4 410
mbed_official 0:51ac1d130fd4 411 ADDCIDNS(CI_MS_DNS2, go->req_dns2, go->dnsaddr[1]);
mbed_official 0:51ac1d130fd4 412
mbed_official 0:51ac1d130fd4 413 *lenp -= len;
mbed_official 0:51ac1d130fd4 414 }
mbed_official 0:51ac1d130fd4 415
mbed_official 0:51ac1d130fd4 416
mbed_official 0:51ac1d130fd4 417 /*
mbed_official 0:51ac1d130fd4 418 * ipcp_ackci - Ack our CIs.
mbed_official 0:51ac1d130fd4 419 *
mbed_official 0:51ac1d130fd4 420 * Returns:
mbed_official 0:51ac1d130fd4 421 * 0 - Ack was bad.
mbed_official 0:51ac1d130fd4 422 * 1 - Ack was good.
mbed_official 0:51ac1d130fd4 423 */
mbed_official 0:51ac1d130fd4 424 static int
mbed_official 0:51ac1d130fd4 425 ipcp_ackci(fsm *f, u_char *p, int len)
mbed_official 0:51ac1d130fd4 426 {
mbed_official 0:51ac1d130fd4 427 ipcp_options *go = &ipcp_gotoptions[f->unit];
mbed_official 0:51ac1d130fd4 428 u_short cilen, citype, cishort;
mbed_official 0:51ac1d130fd4 429 u32_t cilong;
mbed_official 0:51ac1d130fd4 430 u_char cimaxslotindex, cicflag;
mbed_official 0:51ac1d130fd4 431
mbed_official 0:51ac1d130fd4 432 /*
mbed_official 0:51ac1d130fd4 433 * CIs must be in exactly the same order that we sent...
mbed_official 0:51ac1d130fd4 434 * Check packet length and CI length at each step.
mbed_official 0:51ac1d130fd4 435 * If we find any deviations, then this packet is bad.
mbed_official 0:51ac1d130fd4 436 */
mbed_official 0:51ac1d130fd4 437
mbed_official 0:51ac1d130fd4 438 #define ACKCIVJ(opt, neg, val, old, maxslotindex, cflag) \
mbed_official 0:51ac1d130fd4 439 if (neg) { \
mbed_official 0:51ac1d130fd4 440 int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \
mbed_official 0:51ac1d130fd4 441 if ((len -= vjlen) < 0) { \
mbed_official 0:51ac1d130fd4 442 goto bad; \
mbed_official 0:51ac1d130fd4 443 } \
mbed_official 0:51ac1d130fd4 444 GETCHAR(citype, p); \
mbed_official 0:51ac1d130fd4 445 GETCHAR(cilen, p); \
mbed_official 0:51ac1d130fd4 446 if (cilen != vjlen || \
mbed_official 0:51ac1d130fd4 447 citype != opt) { \
mbed_official 0:51ac1d130fd4 448 goto bad; \
mbed_official 0:51ac1d130fd4 449 } \
mbed_official 0:51ac1d130fd4 450 GETSHORT(cishort, p); \
mbed_official 0:51ac1d130fd4 451 if (cishort != val) { \
mbed_official 0:51ac1d130fd4 452 goto bad; \
mbed_official 0:51ac1d130fd4 453 } \
mbed_official 0:51ac1d130fd4 454 if (!old) { \
mbed_official 0:51ac1d130fd4 455 GETCHAR(cimaxslotindex, p); \
mbed_official 0:51ac1d130fd4 456 if (cimaxslotindex != maxslotindex) { \
mbed_official 0:51ac1d130fd4 457 goto bad; \
mbed_official 0:51ac1d130fd4 458 } \
mbed_official 0:51ac1d130fd4 459 GETCHAR(cicflag, p); \
mbed_official 0:51ac1d130fd4 460 if (cicflag != cflag) { \
mbed_official 0:51ac1d130fd4 461 goto bad; \
mbed_official 0:51ac1d130fd4 462 } \
mbed_official 0:51ac1d130fd4 463 } \
mbed_official 0:51ac1d130fd4 464 }
mbed_official 0:51ac1d130fd4 465
mbed_official 0:51ac1d130fd4 466 #define ACKCIADDR(opt, neg, old, val1, val2) \
mbed_official 0:51ac1d130fd4 467 if (neg) { \
mbed_official 0:51ac1d130fd4 468 int addrlen = (old? CILEN_ADDRS: CILEN_ADDR); \
mbed_official 0:51ac1d130fd4 469 u32_t l; \
mbed_official 0:51ac1d130fd4 470 if ((len -= addrlen) < 0) { \
mbed_official 0:51ac1d130fd4 471 goto bad; \
mbed_official 0:51ac1d130fd4 472 } \
mbed_official 0:51ac1d130fd4 473 GETCHAR(citype, p); \
mbed_official 0:51ac1d130fd4 474 GETCHAR(cilen, p); \
mbed_official 0:51ac1d130fd4 475 if (cilen != addrlen || \
mbed_official 0:51ac1d130fd4 476 citype != opt) { \
mbed_official 0:51ac1d130fd4 477 goto bad; \
mbed_official 0:51ac1d130fd4 478 } \
mbed_official 0:51ac1d130fd4 479 GETLONG(l, p); \
mbed_official 0:51ac1d130fd4 480 cilong = htonl(l); \
mbed_official 0:51ac1d130fd4 481 if (val1 != cilong) { \
mbed_official 0:51ac1d130fd4 482 goto bad; \
mbed_official 0:51ac1d130fd4 483 } \
mbed_official 0:51ac1d130fd4 484 if (old) { \
mbed_official 0:51ac1d130fd4 485 GETLONG(l, p); \
mbed_official 0:51ac1d130fd4 486 cilong = htonl(l); \
mbed_official 0:51ac1d130fd4 487 if (val2 != cilong) { \
mbed_official 0:51ac1d130fd4 488 goto bad; \
mbed_official 0:51ac1d130fd4 489 } \
mbed_official 0:51ac1d130fd4 490 } \
mbed_official 0:51ac1d130fd4 491 }
mbed_official 0:51ac1d130fd4 492
mbed_official 0:51ac1d130fd4 493 #define ACKCIDNS(opt, neg, addr) \
mbed_official 0:51ac1d130fd4 494 if (neg) { \
mbed_official 0:51ac1d130fd4 495 u32_t l; \
mbed_official 0:51ac1d130fd4 496 if ((len -= CILEN_ADDR) < 0) { \
mbed_official 0:51ac1d130fd4 497 goto bad; \
mbed_official 0:51ac1d130fd4 498 } \
mbed_official 0:51ac1d130fd4 499 GETCHAR(citype, p); \
mbed_official 0:51ac1d130fd4 500 GETCHAR(cilen, p); \
mbed_official 0:51ac1d130fd4 501 if (cilen != CILEN_ADDR || \
mbed_official 0:51ac1d130fd4 502 citype != opt) { \
mbed_official 0:51ac1d130fd4 503 goto bad; \
mbed_official 0:51ac1d130fd4 504 } \
mbed_official 0:51ac1d130fd4 505 GETLONG(l, p); \
mbed_official 0:51ac1d130fd4 506 cilong = htonl(l); \
mbed_official 0:51ac1d130fd4 507 if (addr != cilong) { \
mbed_official 0:51ac1d130fd4 508 goto bad; \
mbed_official 0:51ac1d130fd4 509 } \
mbed_official 0:51ac1d130fd4 510 }
mbed_official 0:51ac1d130fd4 511
mbed_official 0:51ac1d130fd4 512 ACKCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), go->neg_addr,
mbed_official 0:51ac1d130fd4 513 go->old_addrs, go->ouraddr, go->hisaddr);
mbed_official 0:51ac1d130fd4 514
mbed_official 0:51ac1d130fd4 515 ACKCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj,
mbed_official 0:51ac1d130fd4 516 go->maxslotindex, go->cflag);
mbed_official 0:51ac1d130fd4 517
mbed_official 0:51ac1d130fd4 518 ACKCIDNS(CI_MS_DNS1, go->req_dns1, go->dnsaddr[0]);
mbed_official 0:51ac1d130fd4 519
mbed_official 0:51ac1d130fd4 520 ACKCIDNS(CI_MS_DNS2, go->req_dns2, go->dnsaddr[1]);
mbed_official 0:51ac1d130fd4 521
mbed_official 0:51ac1d130fd4 522 /*
mbed_official 0:51ac1d130fd4 523 * If there are any remaining CIs, then this packet is bad.
mbed_official 0:51ac1d130fd4 524 */
mbed_official 0:51ac1d130fd4 525 if (len != 0) {
mbed_official 0:51ac1d130fd4 526 goto bad;
mbed_official 0:51ac1d130fd4 527 }
mbed_official 0:51ac1d130fd4 528 return (1);
mbed_official 0:51ac1d130fd4 529
mbed_official 0:51ac1d130fd4 530 bad:
mbed_official 0:51ac1d130fd4 531 IPCPDEBUG(LOG_INFO, ("ipcp_ackci: received bad Ack!\n"));
mbed_official 0:51ac1d130fd4 532 return (0);
mbed_official 0:51ac1d130fd4 533 }
mbed_official 0:51ac1d130fd4 534
mbed_official 0:51ac1d130fd4 535 /*
mbed_official 0:51ac1d130fd4 536 * ipcp_nakci - Peer has sent a NAK for some of our CIs.
mbed_official 0:51ac1d130fd4 537 * This should not modify any state if the Nak is bad
mbed_official 0:51ac1d130fd4 538 * or if IPCP is in the LS_OPENED state.
mbed_official 0:51ac1d130fd4 539 *
mbed_official 0:51ac1d130fd4 540 * Returns:
mbed_official 0:51ac1d130fd4 541 * 0 - Nak was bad.
mbed_official 0:51ac1d130fd4 542 * 1 - Nak was good.
mbed_official 0:51ac1d130fd4 543 */
mbed_official 0:51ac1d130fd4 544 static int
mbed_official 0:51ac1d130fd4 545 ipcp_nakci(fsm *f, u_char *p, int len)
mbed_official 0:51ac1d130fd4 546 {
mbed_official 0:51ac1d130fd4 547 ipcp_options *go = &ipcp_gotoptions[f->unit];
mbed_official 0:51ac1d130fd4 548 u_char cimaxslotindex, cicflag;
mbed_official 0:51ac1d130fd4 549 u_char citype, cilen, *next;
mbed_official 0:51ac1d130fd4 550 u_short cishort;
mbed_official 0:51ac1d130fd4 551 u32_t ciaddr1, ciaddr2, l, cidnsaddr;
mbed_official 0:51ac1d130fd4 552 ipcp_options no; /* options we've seen Naks for */
mbed_official 0:51ac1d130fd4 553 ipcp_options try; /* options to request next time */
mbed_official 0:51ac1d130fd4 554
mbed_official 0:51ac1d130fd4 555 BZERO(&no, sizeof(no));
mbed_official 0:51ac1d130fd4 556 try = *go;
mbed_official 0:51ac1d130fd4 557
mbed_official 0:51ac1d130fd4 558 /*
mbed_official 0:51ac1d130fd4 559 * Any Nak'd CIs must be in exactly the same order that we sent.
mbed_official 0:51ac1d130fd4 560 * Check packet length and CI length at each step.
mbed_official 0:51ac1d130fd4 561 * If we find any deviations, then this packet is bad.
mbed_official 0:51ac1d130fd4 562 */
mbed_official 0:51ac1d130fd4 563 #define NAKCIADDR(opt, neg, old, code) \
mbed_official 0:51ac1d130fd4 564 if (go->neg && \
mbed_official 0:51ac1d130fd4 565 len >= (cilen = (old? CILEN_ADDRS: CILEN_ADDR)) && \
mbed_official 0:51ac1d130fd4 566 p[1] == cilen && \
mbed_official 0:51ac1d130fd4 567 p[0] == opt) { \
mbed_official 0:51ac1d130fd4 568 len -= cilen; \
mbed_official 0:51ac1d130fd4 569 INCPTR(2, p); \
mbed_official 0:51ac1d130fd4 570 GETLONG(l, p); \
mbed_official 0:51ac1d130fd4 571 ciaddr1 = htonl(l); \
mbed_official 0:51ac1d130fd4 572 if (old) { \
mbed_official 0:51ac1d130fd4 573 GETLONG(l, p); \
mbed_official 0:51ac1d130fd4 574 ciaddr2 = htonl(l); \
mbed_official 0:51ac1d130fd4 575 no.old_addrs = 1; \
mbed_official 0:51ac1d130fd4 576 } else { \
mbed_official 0:51ac1d130fd4 577 ciaddr2 = 0; \
mbed_official 0:51ac1d130fd4 578 } \
mbed_official 0:51ac1d130fd4 579 no.neg = 1; \
mbed_official 0:51ac1d130fd4 580 code \
mbed_official 0:51ac1d130fd4 581 }
mbed_official 0:51ac1d130fd4 582
mbed_official 0:51ac1d130fd4 583 #define NAKCIVJ(opt, neg, code) \
mbed_official 0:51ac1d130fd4 584 if (go->neg && \
mbed_official 0:51ac1d130fd4 585 ((cilen = p[1]) == CILEN_COMPRESS || cilen == CILEN_VJ) && \
mbed_official 0:51ac1d130fd4 586 len >= cilen && \
mbed_official 0:51ac1d130fd4 587 p[0] == opt) { \
mbed_official 0:51ac1d130fd4 588 len -= cilen; \
mbed_official 0:51ac1d130fd4 589 INCPTR(2, p); \
mbed_official 0:51ac1d130fd4 590 GETSHORT(cishort, p); \
mbed_official 0:51ac1d130fd4 591 no.neg = 1; \
mbed_official 0:51ac1d130fd4 592 code \
mbed_official 0:51ac1d130fd4 593 }
mbed_official 0:51ac1d130fd4 594
mbed_official 0:51ac1d130fd4 595 #define NAKCIDNS(opt, neg, code) \
mbed_official 0:51ac1d130fd4 596 if (go->neg && \
mbed_official 0:51ac1d130fd4 597 ((cilen = p[1]) == CILEN_ADDR) && \
mbed_official 0:51ac1d130fd4 598 len >= cilen && \
mbed_official 0:51ac1d130fd4 599 p[0] == opt) { \
mbed_official 0:51ac1d130fd4 600 len -= cilen; \
mbed_official 0:51ac1d130fd4 601 INCPTR(2, p); \
mbed_official 0:51ac1d130fd4 602 GETLONG(l, p); \
mbed_official 0:51ac1d130fd4 603 cidnsaddr = htonl(l); \
mbed_official 0:51ac1d130fd4 604 no.neg = 1; \
mbed_official 0:51ac1d130fd4 605 code \
mbed_official 0:51ac1d130fd4 606 }
mbed_official 0:51ac1d130fd4 607
mbed_official 0:51ac1d130fd4 608 /*
mbed_official 0:51ac1d130fd4 609 * Accept the peer's idea of {our,his} address, if different
mbed_official 0:51ac1d130fd4 610 * from our idea, only if the accept_{local,remote} flag is set.
mbed_official 0:51ac1d130fd4 611 */
mbed_official 0:51ac1d130fd4 612 NAKCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), neg_addr, go->old_addrs,
mbed_official 0:51ac1d130fd4 613 if (go->accept_local && ciaddr1) { /* Do we know our address? */
mbed_official 0:51ac1d130fd4 614 try.ouraddr = ciaddr1;
mbed_official 0:51ac1d130fd4 615 IPCPDEBUG(LOG_INFO, ("local IP address %s\n",
mbed_official 0:51ac1d130fd4 616 inet_ntoa(ciaddr1)));
mbed_official 0:51ac1d130fd4 617 }
mbed_official 0:51ac1d130fd4 618 if (go->accept_remote && ciaddr2) { /* Does he know his? */
mbed_official 0:51ac1d130fd4 619 try.hisaddr = ciaddr2;
mbed_official 0:51ac1d130fd4 620 IPCPDEBUG(LOG_INFO, ("remote IP address %s\n",
mbed_official 0:51ac1d130fd4 621 inet_ntoa(ciaddr2)));
mbed_official 0:51ac1d130fd4 622 }
mbed_official 0:51ac1d130fd4 623 );
mbed_official 0:51ac1d130fd4 624
mbed_official 0:51ac1d130fd4 625 /*
mbed_official 0:51ac1d130fd4 626 * Accept the peer's value of maxslotindex provided that it
mbed_official 0:51ac1d130fd4 627 * is less than what we asked for. Turn off slot-ID compression
mbed_official 0:51ac1d130fd4 628 * if the peer wants. Send old-style compress-type option if
mbed_official 0:51ac1d130fd4 629 * the peer wants.
mbed_official 0:51ac1d130fd4 630 */
mbed_official 0:51ac1d130fd4 631 NAKCIVJ(CI_COMPRESSTYPE, neg_vj,
mbed_official 0:51ac1d130fd4 632 if (cilen == CILEN_VJ) {
mbed_official 0:51ac1d130fd4 633 GETCHAR(cimaxslotindex, p);
mbed_official 0:51ac1d130fd4 634 GETCHAR(cicflag, p);
mbed_official 0:51ac1d130fd4 635 if (cishort == IPCP_VJ_COMP) {
mbed_official 0:51ac1d130fd4 636 try.old_vj = 0;
mbed_official 0:51ac1d130fd4 637 if (cimaxslotindex < go->maxslotindex) {
mbed_official 0:51ac1d130fd4 638 try.maxslotindex = cimaxslotindex;
mbed_official 0:51ac1d130fd4 639 }
mbed_official 0:51ac1d130fd4 640 if (!cicflag) {
mbed_official 0:51ac1d130fd4 641 try.cflag = 0;
mbed_official 0:51ac1d130fd4 642 }
mbed_official 0:51ac1d130fd4 643 } else {
mbed_official 0:51ac1d130fd4 644 try.neg_vj = 0;
mbed_official 0:51ac1d130fd4 645 }
mbed_official 0:51ac1d130fd4 646 } else {
mbed_official 0:51ac1d130fd4 647 if (cishort == IPCP_VJ_COMP || cishort == IPCP_VJ_COMP_OLD) {
mbed_official 0:51ac1d130fd4 648 try.old_vj = 1;
mbed_official 0:51ac1d130fd4 649 try.vj_protocol = cishort;
mbed_official 0:51ac1d130fd4 650 } else {
mbed_official 0:51ac1d130fd4 651 try.neg_vj = 0;
mbed_official 0:51ac1d130fd4 652 }
mbed_official 0:51ac1d130fd4 653 }
mbed_official 0:51ac1d130fd4 654 );
mbed_official 0:51ac1d130fd4 655
mbed_official 0:51ac1d130fd4 656 NAKCIDNS(CI_MS_DNS1, req_dns1,
mbed_official 0:51ac1d130fd4 657 try.dnsaddr[0] = cidnsaddr;
mbed_official 0:51ac1d130fd4 658 IPCPDEBUG(LOG_INFO, ("primary DNS address %s\n", inet_ntoa(cidnsaddr)));
mbed_official 0:51ac1d130fd4 659 );
mbed_official 0:51ac1d130fd4 660
mbed_official 0:51ac1d130fd4 661 NAKCIDNS(CI_MS_DNS2, req_dns2,
mbed_official 0:51ac1d130fd4 662 try.dnsaddr[1] = cidnsaddr;
mbed_official 0:51ac1d130fd4 663 IPCPDEBUG(LOG_INFO, ("secondary DNS address %s\n", inet_ntoa(cidnsaddr)));
mbed_official 0:51ac1d130fd4 664 );
mbed_official 0:51ac1d130fd4 665
mbed_official 0:51ac1d130fd4 666 /*
mbed_official 0:51ac1d130fd4 667 * There may be remaining CIs, if the peer is requesting negotiation
mbed_official 0:51ac1d130fd4 668 * on an option that we didn't include in our request packet.
mbed_official 0:51ac1d130fd4 669 * If they want to negotiate about IP addresses, we comply.
mbed_official 0:51ac1d130fd4 670 * If they want us to ask for compression, we refuse.
mbed_official 0:51ac1d130fd4 671 */
mbed_official 0:51ac1d130fd4 672 while (len > CILEN_VOID) {
mbed_official 0:51ac1d130fd4 673 GETCHAR(citype, p);
mbed_official 0:51ac1d130fd4 674 GETCHAR(cilen, p);
mbed_official 0:51ac1d130fd4 675 if( (len -= cilen) < 0 ) {
mbed_official 0:51ac1d130fd4 676 goto bad;
mbed_official 0:51ac1d130fd4 677 }
mbed_official 0:51ac1d130fd4 678 next = p + cilen - 2;
mbed_official 0:51ac1d130fd4 679
mbed_official 0:51ac1d130fd4 680 switch (citype) {
mbed_official 0:51ac1d130fd4 681 case CI_COMPRESSTYPE:
mbed_official 0:51ac1d130fd4 682 if (go->neg_vj || no.neg_vj ||
mbed_official 0:51ac1d130fd4 683 (cilen != CILEN_VJ && cilen != CILEN_COMPRESS)) {
mbed_official 0:51ac1d130fd4 684 goto bad;
mbed_official 0:51ac1d130fd4 685 }
mbed_official 0:51ac1d130fd4 686 no.neg_vj = 1;
mbed_official 0:51ac1d130fd4 687 break;
mbed_official 0:51ac1d130fd4 688 case CI_ADDRS:
mbed_official 0:51ac1d130fd4 689 if ((go->neg_addr && go->old_addrs) || no.old_addrs
mbed_official 0:51ac1d130fd4 690 || cilen != CILEN_ADDRS) {
mbed_official 0:51ac1d130fd4 691 goto bad;
mbed_official 0:51ac1d130fd4 692 }
mbed_official 0:51ac1d130fd4 693 try.neg_addr = 1;
mbed_official 0:51ac1d130fd4 694 try.old_addrs = 1;
mbed_official 0:51ac1d130fd4 695 GETLONG(l, p);
mbed_official 0:51ac1d130fd4 696 ciaddr1 = htonl(l);
mbed_official 0:51ac1d130fd4 697 if (ciaddr1 && go->accept_local) {
mbed_official 0:51ac1d130fd4 698 try.ouraddr = ciaddr1;
mbed_official 0:51ac1d130fd4 699 }
mbed_official 0:51ac1d130fd4 700 GETLONG(l, p);
mbed_official 0:51ac1d130fd4 701 ciaddr2 = htonl(l);
mbed_official 0:51ac1d130fd4 702 if (ciaddr2 && go->accept_remote) {
mbed_official 0:51ac1d130fd4 703 try.hisaddr = ciaddr2;
mbed_official 0:51ac1d130fd4 704 }
mbed_official 0:51ac1d130fd4 705 no.old_addrs = 1;
mbed_official 0:51ac1d130fd4 706 break;
mbed_official 0:51ac1d130fd4 707 case CI_ADDR:
mbed_official 0:51ac1d130fd4 708 if (go->neg_addr || no.neg_addr || cilen != CILEN_ADDR) {
mbed_official 0:51ac1d130fd4 709 goto bad;
mbed_official 0:51ac1d130fd4 710 }
mbed_official 0:51ac1d130fd4 711 try.old_addrs = 0;
mbed_official 0:51ac1d130fd4 712 GETLONG(l, p);
mbed_official 0:51ac1d130fd4 713 ciaddr1 = htonl(l);
mbed_official 0:51ac1d130fd4 714 if (ciaddr1 && go->accept_local) {
mbed_official 0:51ac1d130fd4 715 try.ouraddr = ciaddr1;
mbed_official 0:51ac1d130fd4 716 }
mbed_official 0:51ac1d130fd4 717 if (try.ouraddr != 0) {
mbed_official 0:51ac1d130fd4 718 try.neg_addr = 1;
mbed_official 0:51ac1d130fd4 719 }
mbed_official 0:51ac1d130fd4 720 no.neg_addr = 1;
mbed_official 0:51ac1d130fd4 721 break;
mbed_official 0:51ac1d130fd4 722 }
mbed_official 0:51ac1d130fd4 723 p = next;
mbed_official 0:51ac1d130fd4 724 }
mbed_official 0:51ac1d130fd4 725
mbed_official 0:51ac1d130fd4 726 /* If there is still anything left, this packet is bad. */
mbed_official 0:51ac1d130fd4 727 if (len != 0) {
mbed_official 0:51ac1d130fd4 728 goto bad;
mbed_official 0:51ac1d130fd4 729 }
mbed_official 0:51ac1d130fd4 730
mbed_official 0:51ac1d130fd4 731 /*
mbed_official 0:51ac1d130fd4 732 * OK, the Nak is good. Now we can update state.
mbed_official 0:51ac1d130fd4 733 */
mbed_official 0:51ac1d130fd4 734 if (f->state != LS_OPENED) {
mbed_official 0:51ac1d130fd4 735 *go = try;
mbed_official 0:51ac1d130fd4 736 }
mbed_official 0:51ac1d130fd4 737
mbed_official 0:51ac1d130fd4 738 return 1;
mbed_official 0:51ac1d130fd4 739
mbed_official 0:51ac1d130fd4 740 bad:
mbed_official 0:51ac1d130fd4 741 IPCPDEBUG(LOG_INFO, ("ipcp_nakci: received bad Nak!\n"));
mbed_official 0:51ac1d130fd4 742 return 0;
mbed_official 0:51ac1d130fd4 743 }
mbed_official 0:51ac1d130fd4 744
mbed_official 0:51ac1d130fd4 745
mbed_official 0:51ac1d130fd4 746 /*
mbed_official 0:51ac1d130fd4 747 * ipcp_rejci - Reject some of our CIs.
mbed_official 0:51ac1d130fd4 748 */
mbed_official 0:51ac1d130fd4 749 static int
mbed_official 0:51ac1d130fd4 750 ipcp_rejci(fsm *f, u_char *p, int len)
mbed_official 0:51ac1d130fd4 751 {
mbed_official 0:51ac1d130fd4 752 ipcp_options *go = &ipcp_gotoptions[f->unit];
mbed_official 0:51ac1d130fd4 753 u_char cimaxslotindex, ciflag, cilen;
mbed_official 0:51ac1d130fd4 754 u_short cishort;
mbed_official 0:51ac1d130fd4 755 u32_t cilong;
mbed_official 0:51ac1d130fd4 756 ipcp_options try; /* options to request next time */
mbed_official 0:51ac1d130fd4 757
mbed_official 0:51ac1d130fd4 758 try = *go;
mbed_official 0:51ac1d130fd4 759 /*
mbed_official 0:51ac1d130fd4 760 * Any Rejected CIs must be in exactly the same order that we sent.
mbed_official 0:51ac1d130fd4 761 * Check packet length and CI length at each step.
mbed_official 0:51ac1d130fd4 762 * If we find any deviations, then this packet is bad.
mbed_official 0:51ac1d130fd4 763 */
mbed_official 0:51ac1d130fd4 764 #define REJCIADDR(opt, neg, old, val1, val2) \
mbed_official 0:51ac1d130fd4 765 if (go->neg && \
mbed_official 0:51ac1d130fd4 766 len >= (cilen = old? CILEN_ADDRS: CILEN_ADDR) && \
mbed_official 0:51ac1d130fd4 767 p[1] == cilen && \
mbed_official 0:51ac1d130fd4 768 p[0] == opt) { \
mbed_official 0:51ac1d130fd4 769 u32_t l; \
mbed_official 0:51ac1d130fd4 770 len -= cilen; \
mbed_official 0:51ac1d130fd4 771 INCPTR(2, p); \
mbed_official 0:51ac1d130fd4 772 GETLONG(l, p); \
mbed_official 0:51ac1d130fd4 773 cilong = htonl(l); \
mbed_official 0:51ac1d130fd4 774 /* Check rejected value. */ \
mbed_official 0:51ac1d130fd4 775 if (cilong != val1) { \
mbed_official 0:51ac1d130fd4 776 goto bad; \
mbed_official 0:51ac1d130fd4 777 } \
mbed_official 0:51ac1d130fd4 778 if (old) { \
mbed_official 0:51ac1d130fd4 779 GETLONG(l, p); \
mbed_official 0:51ac1d130fd4 780 cilong = htonl(l); \
mbed_official 0:51ac1d130fd4 781 /* Check rejected value. */ \
mbed_official 0:51ac1d130fd4 782 if (cilong != val2) { \
mbed_official 0:51ac1d130fd4 783 goto bad; \
mbed_official 0:51ac1d130fd4 784 } \
mbed_official 0:51ac1d130fd4 785 } \
mbed_official 0:51ac1d130fd4 786 try.neg = 0; \
mbed_official 0:51ac1d130fd4 787 }
mbed_official 0:51ac1d130fd4 788
mbed_official 0:51ac1d130fd4 789 #define REJCIVJ(opt, neg, val, old, maxslot, cflag) \
mbed_official 0:51ac1d130fd4 790 if (go->neg && \
mbed_official 0:51ac1d130fd4 791 p[1] == (old? CILEN_COMPRESS : CILEN_VJ) && \
mbed_official 0:51ac1d130fd4 792 len >= p[1] && \
mbed_official 0:51ac1d130fd4 793 p[0] == opt) { \
mbed_official 0:51ac1d130fd4 794 len -= p[1]; \
mbed_official 0:51ac1d130fd4 795 INCPTR(2, p); \
mbed_official 0:51ac1d130fd4 796 GETSHORT(cishort, p); \
mbed_official 0:51ac1d130fd4 797 /* Check rejected value. */ \
mbed_official 0:51ac1d130fd4 798 if (cishort != val) { \
mbed_official 0:51ac1d130fd4 799 goto bad; \
mbed_official 0:51ac1d130fd4 800 } \
mbed_official 0:51ac1d130fd4 801 if (!old) { \
mbed_official 0:51ac1d130fd4 802 GETCHAR(cimaxslotindex, p); \
mbed_official 0:51ac1d130fd4 803 if (cimaxslotindex != maxslot) { \
mbed_official 0:51ac1d130fd4 804 goto bad; \
mbed_official 0:51ac1d130fd4 805 } \
mbed_official 0:51ac1d130fd4 806 GETCHAR(ciflag, p); \
mbed_official 0:51ac1d130fd4 807 if (ciflag != cflag) { \
mbed_official 0:51ac1d130fd4 808 goto bad; \
mbed_official 0:51ac1d130fd4 809 } \
mbed_official 0:51ac1d130fd4 810 } \
mbed_official 0:51ac1d130fd4 811 try.neg = 0; \
mbed_official 0:51ac1d130fd4 812 }
mbed_official 0:51ac1d130fd4 813
mbed_official 0:51ac1d130fd4 814 #define REJCIDNS(opt, neg, dnsaddr) \
mbed_official 0:51ac1d130fd4 815 if (go->neg && \
mbed_official 0:51ac1d130fd4 816 ((cilen = p[1]) == CILEN_ADDR) && \
mbed_official 0:51ac1d130fd4 817 len >= cilen && \
mbed_official 0:51ac1d130fd4 818 p[0] == opt) { \
mbed_official 0:51ac1d130fd4 819 u32_t l; \
mbed_official 0:51ac1d130fd4 820 len -= cilen; \
mbed_official 0:51ac1d130fd4 821 INCPTR(2, p); \
mbed_official 0:51ac1d130fd4 822 GETLONG(l, p); \
mbed_official 0:51ac1d130fd4 823 cilong = htonl(l); \
mbed_official 0:51ac1d130fd4 824 /* Check rejected value. */ \
mbed_official 0:51ac1d130fd4 825 if (cilong != dnsaddr) { \
mbed_official 0:51ac1d130fd4 826 goto bad; \
mbed_official 0:51ac1d130fd4 827 } \
mbed_official 0:51ac1d130fd4 828 try.neg = 0; \
mbed_official 0:51ac1d130fd4 829 }
mbed_official 0:51ac1d130fd4 830
mbed_official 0:51ac1d130fd4 831 REJCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), neg_addr,
mbed_official 0:51ac1d130fd4 832 go->old_addrs, go->ouraddr, go->hisaddr);
mbed_official 0:51ac1d130fd4 833
mbed_official 0:51ac1d130fd4 834 REJCIVJ(CI_COMPRESSTYPE, neg_vj, go->vj_protocol, go->old_vj,
mbed_official 0:51ac1d130fd4 835 go->maxslotindex, go->cflag);
mbed_official 0:51ac1d130fd4 836
mbed_official 0:51ac1d130fd4 837 REJCIDNS(CI_MS_DNS1, req_dns1, go->dnsaddr[0]);
mbed_official 0:51ac1d130fd4 838
mbed_official 0:51ac1d130fd4 839 REJCIDNS(CI_MS_DNS2, req_dns2, go->dnsaddr[1]);
mbed_official 0:51ac1d130fd4 840
mbed_official 0:51ac1d130fd4 841 /*
mbed_official 0:51ac1d130fd4 842 * If there are any remaining CIs, then this packet is bad.
mbed_official 0:51ac1d130fd4 843 */
mbed_official 0:51ac1d130fd4 844 if (len != 0) {
mbed_official 0:51ac1d130fd4 845 goto bad;
mbed_official 0:51ac1d130fd4 846 }
mbed_official 0:51ac1d130fd4 847 /*
mbed_official 0:51ac1d130fd4 848 * Now we can update state.
mbed_official 0:51ac1d130fd4 849 */
mbed_official 0:51ac1d130fd4 850 if (f->state != LS_OPENED) {
mbed_official 0:51ac1d130fd4 851 *go = try;
mbed_official 0:51ac1d130fd4 852 }
mbed_official 0:51ac1d130fd4 853 return 1;
mbed_official 0:51ac1d130fd4 854
mbed_official 0:51ac1d130fd4 855 bad:
mbed_official 0:51ac1d130fd4 856 IPCPDEBUG(LOG_INFO, ("ipcp_rejci: received bad Reject!\n"));
mbed_official 0:51ac1d130fd4 857 return 0;
mbed_official 0:51ac1d130fd4 858 }
mbed_official 0:51ac1d130fd4 859
mbed_official 0:51ac1d130fd4 860
mbed_official 0:51ac1d130fd4 861 /*
mbed_official 0:51ac1d130fd4 862 * ipcp_reqci - Check the peer's requested CIs and send appropriate response.
mbed_official 0:51ac1d130fd4 863 *
mbed_official 0:51ac1d130fd4 864 * Returns: CONFACK, CONFNAK or CONFREJ and input packet modified
mbed_official 0:51ac1d130fd4 865 * appropriately. If reject_if_disagree is non-zero, doesn't return
mbed_official 0:51ac1d130fd4 866 * CONFNAK; returns CONFREJ if it can't return CONFACK.
mbed_official 0:51ac1d130fd4 867 */
mbed_official 0:51ac1d130fd4 868 static int
mbed_official 0:51ac1d130fd4 869 ipcp_reqci(fsm *f, u_char *inp/* Requested CIs */,int *len/* Length of requested CIs */,int reject_if_disagree)
mbed_official 0:51ac1d130fd4 870 {
mbed_official 0:51ac1d130fd4 871 ipcp_options *wo = &ipcp_wantoptions[f->unit];
mbed_official 0:51ac1d130fd4 872 ipcp_options *ho = &ipcp_hisoptions[f->unit];
mbed_official 0:51ac1d130fd4 873 ipcp_options *ao = &ipcp_allowoptions[f->unit];
mbed_official 0:51ac1d130fd4 874 #ifdef OLD_CI_ADDRS
mbed_official 0:51ac1d130fd4 875 ipcp_options *go = &ipcp_gotoptions[f->unit];
mbed_official 0:51ac1d130fd4 876 #endif
mbed_official 0:51ac1d130fd4 877 u_char *cip, *next; /* Pointer to current and next CIs */
mbed_official 0:51ac1d130fd4 878 u_short cilen, citype; /* Parsed len, type */
mbed_official 0:51ac1d130fd4 879 u_short cishort; /* Parsed short value */
mbed_official 0:51ac1d130fd4 880 u32_t tl, ciaddr1; /* Parsed address values */
mbed_official 0:51ac1d130fd4 881 #ifdef OLD_CI_ADDRS
mbed_official 0:51ac1d130fd4 882 u32_t ciaddr2; /* Parsed address values */
mbed_official 0:51ac1d130fd4 883 #endif
mbed_official 0:51ac1d130fd4 884 int rc = CONFACK; /* Final packet return code */
mbed_official 0:51ac1d130fd4 885 int orc; /* Individual option return code */
mbed_official 0:51ac1d130fd4 886 u_char *p; /* Pointer to next char to parse */
mbed_official 0:51ac1d130fd4 887 u_char *ucp = inp; /* Pointer to current output char */
mbed_official 0:51ac1d130fd4 888 int l = *len; /* Length left */
mbed_official 0:51ac1d130fd4 889 u_char maxslotindex, cflag;
mbed_official 0:51ac1d130fd4 890 int d;
mbed_official 0:51ac1d130fd4 891
mbed_official 0:51ac1d130fd4 892 cis_received[f->unit] = 1;
mbed_official 0:51ac1d130fd4 893
mbed_official 0:51ac1d130fd4 894 /*
mbed_official 0:51ac1d130fd4 895 * Reset all his options.
mbed_official 0:51ac1d130fd4 896 */
mbed_official 0:51ac1d130fd4 897 BZERO(ho, sizeof(*ho));
mbed_official 0:51ac1d130fd4 898
mbed_official 0:51ac1d130fd4 899 /*
mbed_official 0:51ac1d130fd4 900 * Process all his options.
mbed_official 0:51ac1d130fd4 901 */
mbed_official 0:51ac1d130fd4 902 next = inp;
mbed_official 0:51ac1d130fd4 903 while (l) {
mbed_official 0:51ac1d130fd4 904 orc = CONFACK; /* Assume success */
mbed_official 0:51ac1d130fd4 905 cip = p = next; /* Remember begining of CI */
mbed_official 0:51ac1d130fd4 906 if (l < 2 || /* Not enough data for CI header or */
mbed_official 0:51ac1d130fd4 907 p[1] < 2 || /* CI length too small or */
mbed_official 0:51ac1d130fd4 908 p[1] > l) { /* CI length too big? */
mbed_official 0:51ac1d130fd4 909 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: bad CI length!\n"));
mbed_official 0:51ac1d130fd4 910 orc = CONFREJ; /* Reject bad CI */
mbed_official 0:51ac1d130fd4 911 cilen = (u_short)l;/* Reject till end of packet */
mbed_official 0:51ac1d130fd4 912 l = 0; /* Don't loop again */
mbed_official 0:51ac1d130fd4 913 goto endswitch;
mbed_official 0:51ac1d130fd4 914 }
mbed_official 0:51ac1d130fd4 915 GETCHAR(citype, p); /* Parse CI type */
mbed_official 0:51ac1d130fd4 916 GETCHAR(cilen, p); /* Parse CI length */
mbed_official 0:51ac1d130fd4 917 l -= cilen; /* Adjust remaining length */
mbed_official 0:51ac1d130fd4 918 next += cilen; /* Step to next CI */
mbed_official 0:51ac1d130fd4 919
mbed_official 0:51ac1d130fd4 920 switch (citype) { /* Check CI type */
mbed_official 0:51ac1d130fd4 921 #ifdef OLD_CI_ADDRS /* Need to save space... */
mbed_official 0:51ac1d130fd4 922 case CI_ADDRS:
mbed_official 0:51ac1d130fd4 923 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received ADDRS\n"));
mbed_official 0:51ac1d130fd4 924 if (!ao->neg_addr ||
mbed_official 0:51ac1d130fd4 925 cilen != CILEN_ADDRS) { /* Check CI length */
mbed_official 0:51ac1d130fd4 926 orc = CONFREJ; /* Reject CI */
mbed_official 0:51ac1d130fd4 927 break;
mbed_official 0:51ac1d130fd4 928 }
mbed_official 0:51ac1d130fd4 929
mbed_official 0:51ac1d130fd4 930 /*
mbed_official 0:51ac1d130fd4 931 * If he has no address, or if we both have his address but
mbed_official 0:51ac1d130fd4 932 * disagree about it, then NAK it with our idea.
mbed_official 0:51ac1d130fd4 933 * In particular, if we don't know his address, but he does,
mbed_official 0:51ac1d130fd4 934 * then accept it.
mbed_official 0:51ac1d130fd4 935 */
mbed_official 0:51ac1d130fd4 936 GETLONG(tl, p); /* Parse source address (his) */
mbed_official 0:51ac1d130fd4 937 ciaddr1 = htonl(tl);
mbed_official 0:51ac1d130fd4 938 IPCPDEBUG(LOG_INFO, ("his addr %s\n", inet_ntoa(ciaddr1)));
mbed_official 0:51ac1d130fd4 939 if (ciaddr1 != wo->hisaddr
mbed_official 0:51ac1d130fd4 940 && (ciaddr1 == 0 || !wo->accept_remote)) {
mbed_official 0:51ac1d130fd4 941 orc = CONFNAK;
mbed_official 0:51ac1d130fd4 942 if (!reject_if_disagree) {
mbed_official 0:51ac1d130fd4 943 DECPTR(sizeof(u32_t), p);
mbed_official 0:51ac1d130fd4 944 tl = ntohl(wo->hisaddr);
mbed_official 0:51ac1d130fd4 945 PUTLONG(tl, p);
mbed_official 0:51ac1d130fd4 946 }
mbed_official 0:51ac1d130fd4 947 } else if (ciaddr1 == 0 && wo->hisaddr == 0) {
mbed_official 0:51ac1d130fd4 948 /*
mbed_official 0:51ac1d130fd4 949 * If neither we nor he knows his address, reject the option.
mbed_official 0:51ac1d130fd4 950 */
mbed_official 0:51ac1d130fd4 951 orc = CONFREJ;
mbed_official 0:51ac1d130fd4 952 wo->req_addr = 0; /* don't NAK with 0.0.0.0 later */
mbed_official 0:51ac1d130fd4 953 break;
mbed_official 0:51ac1d130fd4 954 }
mbed_official 0:51ac1d130fd4 955
mbed_official 0:51ac1d130fd4 956 /*
mbed_official 0:51ac1d130fd4 957 * If he doesn't know our address, or if we both have our address
mbed_official 0:51ac1d130fd4 958 * but disagree about it, then NAK it with our idea.
mbed_official 0:51ac1d130fd4 959 */
mbed_official 0:51ac1d130fd4 960 GETLONG(tl, p); /* Parse desination address (ours) */
mbed_official 0:51ac1d130fd4 961 ciaddr2 = htonl(tl);
mbed_official 0:51ac1d130fd4 962 IPCPDEBUG(LOG_INFO, ("our addr %s\n", inet_ntoa(ciaddr2)));
mbed_official 0:51ac1d130fd4 963 if (ciaddr2 != wo->ouraddr) {
mbed_official 0:51ac1d130fd4 964 if (ciaddr2 == 0 || !wo->accept_local) {
mbed_official 0:51ac1d130fd4 965 orc = CONFNAK;
mbed_official 0:51ac1d130fd4 966 if (!reject_if_disagree) {
mbed_official 0:51ac1d130fd4 967 DECPTR(sizeof(u32_t), p);
mbed_official 0:51ac1d130fd4 968 tl = ntohl(wo->ouraddr);
mbed_official 0:51ac1d130fd4 969 PUTLONG(tl, p);
mbed_official 0:51ac1d130fd4 970 }
mbed_official 0:51ac1d130fd4 971 } else {
mbed_official 0:51ac1d130fd4 972 go->ouraddr = ciaddr2; /* accept peer's idea */
mbed_official 0:51ac1d130fd4 973 }
mbed_official 0:51ac1d130fd4 974 }
mbed_official 0:51ac1d130fd4 975
mbed_official 0:51ac1d130fd4 976 ho->neg_addr = 1;
mbed_official 0:51ac1d130fd4 977 ho->old_addrs = 1;
mbed_official 0:51ac1d130fd4 978 ho->hisaddr = ciaddr1;
mbed_official 0:51ac1d130fd4 979 ho->ouraddr = ciaddr2;
mbed_official 0:51ac1d130fd4 980 break;
mbed_official 0:51ac1d130fd4 981 #endif
mbed_official 0:51ac1d130fd4 982
mbed_official 0:51ac1d130fd4 983 case CI_ADDR:
mbed_official 0:51ac1d130fd4 984 if (!ao->neg_addr) {
mbed_official 0:51ac1d130fd4 985 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR not allowed\n"));
mbed_official 0:51ac1d130fd4 986 orc = CONFREJ; /* Reject CI */
mbed_official 0:51ac1d130fd4 987 break;
mbed_official 0:51ac1d130fd4 988 } else if (cilen != CILEN_ADDR) { /* Check CI length */
mbed_official 0:51ac1d130fd4 989 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR bad len\n"));
mbed_official 0:51ac1d130fd4 990 orc = CONFREJ; /* Reject CI */
mbed_official 0:51ac1d130fd4 991 break;
mbed_official 0:51ac1d130fd4 992 }
mbed_official 0:51ac1d130fd4 993
mbed_official 0:51ac1d130fd4 994 /*
mbed_official 0:51ac1d130fd4 995 * If he has no address, or if we both have his address but
mbed_official 0:51ac1d130fd4 996 * disagree about it, then NAK it with our idea.
mbed_official 0:51ac1d130fd4 997 * In particular, if we don't know his address, but he does,
mbed_official 0:51ac1d130fd4 998 * then accept it.
mbed_official 0:51ac1d130fd4 999 */
mbed_official 0:51ac1d130fd4 1000 GETLONG(tl, p); /* Parse source address (his) */
mbed_official 0:51ac1d130fd4 1001 ciaddr1 = htonl(tl);
mbed_official 0:51ac1d130fd4 1002 if (ciaddr1 != wo->hisaddr
mbed_official 0:51ac1d130fd4 1003 && (ciaddr1 == 0 || !wo->accept_remote)) {
mbed_official 0:51ac1d130fd4 1004 orc = CONFNAK;
mbed_official 0:51ac1d130fd4 1005 if (!reject_if_disagree) {
mbed_official 0:51ac1d130fd4 1006 DECPTR(sizeof(u32_t), p);
mbed_official 0:51ac1d130fd4 1007 tl = ntohl(wo->hisaddr);
mbed_official 0:51ac1d130fd4 1008 PUTLONG(tl, p);
mbed_official 0:51ac1d130fd4 1009 }
mbed_official 0:51ac1d130fd4 1010 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Nak ADDR %s\n", inet_ntoa(ciaddr1)));
mbed_official 0:51ac1d130fd4 1011 } else if (ciaddr1 == 0 && wo->hisaddr == 0) {
mbed_official 0:51ac1d130fd4 1012 /*
mbed_official 0:51ac1d130fd4 1013 * Don't ACK an address of 0.0.0.0 - reject it instead.
mbed_official 0:51ac1d130fd4 1014 */
mbed_official 0:51ac1d130fd4 1015 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR %s\n", inet_ntoa(ciaddr1)));
mbed_official 0:51ac1d130fd4 1016 orc = CONFREJ;
mbed_official 0:51ac1d130fd4 1017 wo->req_addr = 0; /* don't NAK with 0.0.0.0 later */
mbed_official 0:51ac1d130fd4 1018 break;
mbed_official 0:51ac1d130fd4 1019 }
mbed_official 0:51ac1d130fd4 1020
mbed_official 0:51ac1d130fd4 1021 ho->neg_addr = 1;
mbed_official 0:51ac1d130fd4 1022 ho->hisaddr = ciaddr1;
mbed_official 0:51ac1d130fd4 1023 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: ADDR %s\n", inet_ntoa(ciaddr1)));
mbed_official 0:51ac1d130fd4 1024 break;
mbed_official 0:51ac1d130fd4 1025
mbed_official 0:51ac1d130fd4 1026 case CI_MS_DNS1:
mbed_official 0:51ac1d130fd4 1027 case CI_MS_DNS2:
mbed_official 0:51ac1d130fd4 1028 /* Microsoft primary or secondary DNS request */
mbed_official 0:51ac1d130fd4 1029 d = citype == CI_MS_DNS2;
mbed_official 0:51ac1d130fd4 1030
mbed_official 0:51ac1d130fd4 1031 /* If we do not have a DNS address then we cannot send it */
mbed_official 0:51ac1d130fd4 1032 if (ao->dnsaddr[d] == 0 ||
mbed_official 0:51ac1d130fd4 1033 cilen != CILEN_ADDR) { /* Check CI length */
mbed_official 0:51ac1d130fd4 1034 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting DNS%d Request\n", d+1));
mbed_official 0:51ac1d130fd4 1035 orc = CONFREJ; /* Reject CI */
mbed_official 0:51ac1d130fd4 1036 break;
mbed_official 0:51ac1d130fd4 1037 }
mbed_official 0:51ac1d130fd4 1038 GETLONG(tl, p);
mbed_official 0:51ac1d130fd4 1039 if (htonl(tl) != ao->dnsaddr[d]) {
mbed_official 0:51ac1d130fd4 1040 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking DNS%d Request %s\n",
mbed_official 0:51ac1d130fd4 1041 d+1, inet_ntoa(tl)));
mbed_official 0:51ac1d130fd4 1042 DECPTR(sizeof(u32_t), p);
mbed_official 0:51ac1d130fd4 1043 tl = ntohl(ao->dnsaddr[d]);
mbed_official 0:51ac1d130fd4 1044 PUTLONG(tl, p);
mbed_official 0:51ac1d130fd4 1045 orc = CONFNAK;
mbed_official 0:51ac1d130fd4 1046 }
mbed_official 0:51ac1d130fd4 1047 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received DNS%d Request\n", d+1));
mbed_official 0:51ac1d130fd4 1048 break;
mbed_official 0:51ac1d130fd4 1049
mbed_official 0:51ac1d130fd4 1050 case CI_MS_WINS1:
mbed_official 0:51ac1d130fd4 1051 case CI_MS_WINS2:
mbed_official 0:51ac1d130fd4 1052 /* Microsoft primary or secondary WINS request */
mbed_official 0:51ac1d130fd4 1053 d = citype == CI_MS_WINS2;
mbed_official 0:51ac1d130fd4 1054 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received WINS%d Request\n", d+1));
mbed_official 0:51ac1d130fd4 1055
mbed_official 0:51ac1d130fd4 1056 /* If we do not have a DNS address then we cannot send it */
mbed_official 0:51ac1d130fd4 1057 if (ao->winsaddr[d] == 0 ||
mbed_official 0:51ac1d130fd4 1058 cilen != CILEN_ADDR) { /* Check CI length */
mbed_official 0:51ac1d130fd4 1059 orc = CONFREJ; /* Reject CI */
mbed_official 0:51ac1d130fd4 1060 break;
mbed_official 0:51ac1d130fd4 1061 }
mbed_official 0:51ac1d130fd4 1062 GETLONG(tl, p);
mbed_official 0:51ac1d130fd4 1063 if (htonl(tl) != ao->winsaddr[d]) {
mbed_official 0:51ac1d130fd4 1064 DECPTR(sizeof(u32_t), p);
mbed_official 0:51ac1d130fd4 1065 tl = ntohl(ao->winsaddr[d]);
mbed_official 0:51ac1d130fd4 1066 PUTLONG(tl, p);
mbed_official 0:51ac1d130fd4 1067 orc = CONFNAK;
mbed_official 0:51ac1d130fd4 1068 }
mbed_official 0:51ac1d130fd4 1069 break;
mbed_official 0:51ac1d130fd4 1070
mbed_official 0:51ac1d130fd4 1071 case CI_COMPRESSTYPE:
mbed_official 0:51ac1d130fd4 1072 if (!ao->neg_vj) {
mbed_official 0:51ac1d130fd4 1073 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE not allowed\n"));
mbed_official 0:51ac1d130fd4 1074 orc = CONFREJ;
mbed_official 0:51ac1d130fd4 1075 break;
mbed_official 0:51ac1d130fd4 1076 } else if (cilen != CILEN_VJ && cilen != CILEN_COMPRESS) {
mbed_official 0:51ac1d130fd4 1077 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE len=%d\n", cilen));
mbed_official 0:51ac1d130fd4 1078 orc = CONFREJ;
mbed_official 0:51ac1d130fd4 1079 break;
mbed_official 0:51ac1d130fd4 1080 }
mbed_official 0:51ac1d130fd4 1081 GETSHORT(cishort, p);
mbed_official 0:51ac1d130fd4 1082
mbed_official 0:51ac1d130fd4 1083 if (!(cishort == IPCP_VJ_COMP ||
mbed_official 0:51ac1d130fd4 1084 (cishort == IPCP_VJ_COMP_OLD && cilen == CILEN_COMPRESS))) {
mbed_official 0:51ac1d130fd4 1085 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE %d\n", cishort));
mbed_official 0:51ac1d130fd4 1086 orc = CONFREJ;
mbed_official 0:51ac1d130fd4 1087 break;
mbed_official 0:51ac1d130fd4 1088 }
mbed_official 0:51ac1d130fd4 1089
mbed_official 0:51ac1d130fd4 1090 ho->neg_vj = 1;
mbed_official 0:51ac1d130fd4 1091 ho->vj_protocol = cishort;
mbed_official 0:51ac1d130fd4 1092 if (cilen == CILEN_VJ) {
mbed_official 0:51ac1d130fd4 1093 GETCHAR(maxslotindex, p);
mbed_official 0:51ac1d130fd4 1094 if (maxslotindex > ao->maxslotindex) {
mbed_official 0:51ac1d130fd4 1095 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking VJ max slot %d\n", maxslotindex));
mbed_official 0:51ac1d130fd4 1096 orc = CONFNAK;
mbed_official 0:51ac1d130fd4 1097 if (!reject_if_disagree) {
mbed_official 0:51ac1d130fd4 1098 DECPTR(1, p);
mbed_official 0:51ac1d130fd4 1099 PUTCHAR(ao->maxslotindex, p);
mbed_official 0:51ac1d130fd4 1100 }
mbed_official 0:51ac1d130fd4 1101 }
mbed_official 0:51ac1d130fd4 1102 GETCHAR(cflag, p);
mbed_official 0:51ac1d130fd4 1103 if (cflag && !ao->cflag) {
mbed_official 0:51ac1d130fd4 1104 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking VJ cflag %d\n", cflag));
mbed_official 0:51ac1d130fd4 1105 orc = CONFNAK;
mbed_official 0:51ac1d130fd4 1106 if (!reject_if_disagree) {
mbed_official 0:51ac1d130fd4 1107 DECPTR(1, p);
mbed_official 0:51ac1d130fd4 1108 PUTCHAR(wo->cflag, p);
mbed_official 0:51ac1d130fd4 1109 }
mbed_official 0:51ac1d130fd4 1110 }
mbed_official 0:51ac1d130fd4 1111 ho->maxslotindex = maxslotindex;
mbed_official 0:51ac1d130fd4 1112 ho->cflag = cflag;
mbed_official 0:51ac1d130fd4 1113 } else {
mbed_official 0:51ac1d130fd4 1114 ho->old_vj = 1;
mbed_official 0:51ac1d130fd4 1115 ho->maxslotindex = MAX_SLOTS - 1;
mbed_official 0:51ac1d130fd4 1116 ho->cflag = 1;
mbed_official 0:51ac1d130fd4 1117 }
mbed_official 0:51ac1d130fd4 1118 IPCPDEBUG(LOG_INFO, (
mbed_official 0:51ac1d130fd4 1119 "ipcp_reqci: received COMPRESSTYPE p=%d old=%d maxslot=%d cflag=%d\n",
mbed_official 0:51ac1d130fd4 1120 ho->vj_protocol, ho->old_vj, ho->maxslotindex, ho->cflag));
mbed_official 0:51ac1d130fd4 1121 break;
mbed_official 0:51ac1d130fd4 1122
mbed_official 0:51ac1d130fd4 1123 default:
mbed_official 0:51ac1d130fd4 1124 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting unknown CI type %d\n", citype));
mbed_official 0:51ac1d130fd4 1125 orc = CONFREJ;
mbed_official 0:51ac1d130fd4 1126 break;
mbed_official 0:51ac1d130fd4 1127 }
mbed_official 0:51ac1d130fd4 1128
mbed_official 0:51ac1d130fd4 1129 endswitch:
mbed_official 0:51ac1d130fd4 1130 if (orc == CONFACK && /* Good CI */
mbed_official 0:51ac1d130fd4 1131 rc != CONFACK) { /* but prior CI wasnt? */
mbed_official 0:51ac1d130fd4 1132 continue; /* Don't send this one */
mbed_official 0:51ac1d130fd4 1133 }
mbed_official 0:51ac1d130fd4 1134
mbed_official 0:51ac1d130fd4 1135 if (orc == CONFNAK) { /* Nak this CI? */
mbed_official 0:51ac1d130fd4 1136 if (reject_if_disagree) { /* Getting fed up with sending NAKs? */
mbed_official 0:51ac1d130fd4 1137 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting too many naks\n"));
mbed_official 0:51ac1d130fd4 1138 orc = CONFREJ; /* Get tough if so */
mbed_official 0:51ac1d130fd4 1139 } else {
mbed_official 0:51ac1d130fd4 1140 if (rc == CONFREJ) { /* Rejecting prior CI? */
mbed_official 0:51ac1d130fd4 1141 continue; /* Don't send this one */
mbed_official 0:51ac1d130fd4 1142 }
mbed_official 0:51ac1d130fd4 1143 if (rc == CONFACK) { /* Ack'd all prior CIs? */
mbed_official 0:51ac1d130fd4 1144 rc = CONFNAK; /* Not anymore... */
mbed_official 0:51ac1d130fd4 1145 ucp = inp; /* Backup */
mbed_official 0:51ac1d130fd4 1146 }
mbed_official 0:51ac1d130fd4 1147 }
mbed_official 0:51ac1d130fd4 1148 }
mbed_official 0:51ac1d130fd4 1149
mbed_official 0:51ac1d130fd4 1150 if (orc == CONFREJ && /* Reject this CI */
mbed_official 0:51ac1d130fd4 1151 rc != CONFREJ) { /* but no prior ones? */
mbed_official 0:51ac1d130fd4 1152 rc = CONFREJ;
mbed_official 0:51ac1d130fd4 1153 ucp = inp; /* Backup */
mbed_official 0:51ac1d130fd4 1154 }
mbed_official 0:51ac1d130fd4 1155
mbed_official 0:51ac1d130fd4 1156 /* Need to move CI? */
mbed_official 0:51ac1d130fd4 1157 if (ucp != cip) {
mbed_official 0:51ac1d130fd4 1158 BCOPY(cip, ucp, cilen); /* Move it */
mbed_official 0:51ac1d130fd4 1159 }
mbed_official 0:51ac1d130fd4 1160
mbed_official 0:51ac1d130fd4 1161 /* Update output pointer */
mbed_official 0:51ac1d130fd4 1162 INCPTR(cilen, ucp);
mbed_official 0:51ac1d130fd4 1163 }
mbed_official 0:51ac1d130fd4 1164
mbed_official 0:51ac1d130fd4 1165 /*
mbed_official 0:51ac1d130fd4 1166 * If we aren't rejecting this packet, and we want to negotiate
mbed_official 0:51ac1d130fd4 1167 * their address, and they didn't send their address, then we
mbed_official 0:51ac1d130fd4 1168 * send a NAK with a CI_ADDR option appended. We assume the
mbed_official 0:51ac1d130fd4 1169 * input buffer is long enough that we can append the extra
mbed_official 0:51ac1d130fd4 1170 * option safely.
mbed_official 0:51ac1d130fd4 1171 */
mbed_official 0:51ac1d130fd4 1172 if (rc != CONFREJ && !ho->neg_addr &&
mbed_official 0:51ac1d130fd4 1173 wo->req_addr && !reject_if_disagree) {
mbed_official 0:51ac1d130fd4 1174 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Requesting peer address\n"));
mbed_official 0:51ac1d130fd4 1175 if (rc == CONFACK) {
mbed_official 0:51ac1d130fd4 1176 rc = CONFNAK;
mbed_official 0:51ac1d130fd4 1177 ucp = inp; /* reset pointer */
mbed_official 0:51ac1d130fd4 1178 wo->req_addr = 0; /* don't ask again */
mbed_official 0:51ac1d130fd4 1179 }
mbed_official 0:51ac1d130fd4 1180 PUTCHAR(CI_ADDR, ucp);
mbed_official 0:51ac1d130fd4 1181 PUTCHAR(CILEN_ADDR, ucp);
mbed_official 0:51ac1d130fd4 1182 tl = ntohl(wo->hisaddr);
mbed_official 0:51ac1d130fd4 1183 PUTLONG(tl, ucp);
mbed_official 0:51ac1d130fd4 1184 }
mbed_official 0:51ac1d130fd4 1185
mbed_official 0:51ac1d130fd4 1186 *len = (int)(ucp - inp); /* Compute output length */
mbed_official 0:51ac1d130fd4 1187 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: returning Configure-%s\n", CODENAME(rc)));
mbed_official 0:51ac1d130fd4 1188 return (rc); /* Return final code */
mbed_official 0:51ac1d130fd4 1189 }
mbed_official 0:51ac1d130fd4 1190
mbed_official 0:51ac1d130fd4 1191
mbed_official 0:51ac1d130fd4 1192 #if 0
mbed_official 0:51ac1d130fd4 1193 /*
mbed_official 0:51ac1d130fd4 1194 * ip_check_options - check that any IP-related options are OK,
mbed_official 0:51ac1d130fd4 1195 * and assign appropriate defaults.
mbed_official 0:51ac1d130fd4 1196 */
mbed_official 0:51ac1d130fd4 1197 static void
mbed_official 0:51ac1d130fd4 1198 ip_check_options(u_long localAddr)
mbed_official 0:51ac1d130fd4 1199 {
mbed_official 0:51ac1d130fd4 1200 ipcp_options *wo = &ipcp_wantoptions[0];
mbed_official 0:51ac1d130fd4 1201
mbed_official 0:51ac1d130fd4 1202 /*
mbed_official 0:51ac1d130fd4 1203 * Load our default IP address but allow the remote host to give us
mbed_official 0:51ac1d130fd4 1204 * a new address.
mbed_official 0:51ac1d130fd4 1205 */
mbed_official 0:51ac1d130fd4 1206 if (wo->ouraddr == 0 && !ppp_settings.disable_defaultip) {
mbed_official 0:51ac1d130fd4 1207 wo->accept_local = 1; /* don't insist on this default value */
mbed_official 0:51ac1d130fd4 1208 wo->ouraddr = htonl(localAddr);
mbed_official 0:51ac1d130fd4 1209 }
mbed_official 0:51ac1d130fd4 1210 }
mbed_official 0:51ac1d130fd4 1211 #endif
mbed_official 0:51ac1d130fd4 1212
mbed_official 0:51ac1d130fd4 1213
mbed_official 0:51ac1d130fd4 1214 /*
mbed_official 0:51ac1d130fd4 1215 * ipcp_up - IPCP has come UP.
mbed_official 0:51ac1d130fd4 1216 *
mbed_official 0:51ac1d130fd4 1217 * Configure the IP network interface appropriately and bring it up.
mbed_official 0:51ac1d130fd4 1218 */
mbed_official 0:51ac1d130fd4 1219 static void
mbed_official 0:51ac1d130fd4 1220 ipcp_up(fsm *f)
mbed_official 0:51ac1d130fd4 1221 {
mbed_official 0:51ac1d130fd4 1222 u32_t mask;
mbed_official 0:51ac1d130fd4 1223 ipcp_options *ho = &ipcp_hisoptions[f->unit];
mbed_official 0:51ac1d130fd4 1224 ipcp_options *go = &ipcp_gotoptions[f->unit];
mbed_official 0:51ac1d130fd4 1225 ipcp_options *wo = &ipcp_wantoptions[f->unit];
mbed_official 0:51ac1d130fd4 1226
mbed_official 0:51ac1d130fd4 1227 np_up(f->unit, PPP_IP);
mbed_official 0:51ac1d130fd4 1228 IPCPDEBUG(LOG_INFO, ("ipcp: up\n"));
mbed_official 0:51ac1d130fd4 1229
mbed_official 0:51ac1d130fd4 1230 /*
mbed_official 0:51ac1d130fd4 1231 * We must have a non-zero IP address for both ends of the link.
mbed_official 0:51ac1d130fd4 1232 */
mbed_official 0:51ac1d130fd4 1233 if (!ho->neg_addr) {
mbed_official 0:51ac1d130fd4 1234 ho->hisaddr = wo->hisaddr;
mbed_official 0:51ac1d130fd4 1235 }
mbed_official 0:51ac1d130fd4 1236
mbed_official 0:51ac1d130fd4 1237 if (ho->hisaddr == 0) {
mbed_official 0:51ac1d130fd4 1238 IPCPDEBUG(LOG_ERR, ("Could not determine remote IP address\n"));
mbed_official 0:51ac1d130fd4 1239 ipcp_close(f->unit, "Could not determine remote IP address");
mbed_official 0:51ac1d130fd4 1240 return;
mbed_official 0:51ac1d130fd4 1241 }
mbed_official 0:51ac1d130fd4 1242 if (go->ouraddr == 0) {
mbed_official 0:51ac1d130fd4 1243 IPCPDEBUG(LOG_ERR, ("Could not determine local IP address\n"));
mbed_official 0:51ac1d130fd4 1244 ipcp_close(f->unit, "Could not determine local IP address");
mbed_official 0:51ac1d130fd4 1245 return;
mbed_official 0:51ac1d130fd4 1246 }
mbed_official 0:51ac1d130fd4 1247
mbed_official 0:51ac1d130fd4 1248 if (ppp_settings.usepeerdns && (go->dnsaddr[0] || go->dnsaddr[1])) {
mbed_official 0:51ac1d130fd4 1249 /*pppGotDNSAddrs(go->dnsaddr[0], go->dnsaddr[1]);*/
mbed_official 0:51ac1d130fd4 1250 }
mbed_official 0:51ac1d130fd4 1251
mbed_official 0:51ac1d130fd4 1252 /*
mbed_official 0:51ac1d130fd4 1253 * Check that the peer is allowed to use the IP address it wants.
mbed_official 0:51ac1d130fd4 1254 */
mbed_official 0:51ac1d130fd4 1255 if (!auth_ip_addr(f->unit, ho->hisaddr)) {
mbed_official 0:51ac1d130fd4 1256 IPCPDEBUG(LOG_ERR, ("Peer is not authorized to use remote address %s\n",
mbed_official 0:51ac1d130fd4 1257 inet_ntoa(ho->hisaddr)));
mbed_official 0:51ac1d130fd4 1258 ipcp_close(f->unit, "Unauthorized remote IP address");
mbed_official 0:51ac1d130fd4 1259 return;
mbed_official 0:51ac1d130fd4 1260 }
mbed_official 0:51ac1d130fd4 1261
mbed_official 0:51ac1d130fd4 1262 /* set tcp compression */
mbed_official 0:51ac1d130fd4 1263 sifvjcomp(f->unit, ho->neg_vj, ho->cflag, ho->maxslotindex);
mbed_official 0:51ac1d130fd4 1264
mbed_official 0:51ac1d130fd4 1265 /*
mbed_official 0:51ac1d130fd4 1266 * Set IP addresses and (if specified) netmask.
mbed_official 0:51ac1d130fd4 1267 */
mbed_official 0:51ac1d130fd4 1268 mask = GetMask(go->ouraddr);
mbed_official 0:51ac1d130fd4 1269
mbed_official 0:51ac1d130fd4 1270 if (!sifaddr(f->unit, go->ouraddr, ho->hisaddr, mask, go->dnsaddr[0], go->dnsaddr[1])) {
mbed_official 0:51ac1d130fd4 1271 IPCPDEBUG(LOG_WARNING, ("sifaddr failed\n"));
mbed_official 0:51ac1d130fd4 1272 ipcp_close(f->unit, "Interface configuration failed");
mbed_official 0:51ac1d130fd4 1273 return;
mbed_official 0:51ac1d130fd4 1274 }
mbed_official 0:51ac1d130fd4 1275
mbed_official 0:51ac1d130fd4 1276 /* bring the interface up for IP */
mbed_official 0:51ac1d130fd4 1277 if (!sifup(f->unit)) {
mbed_official 0:51ac1d130fd4 1278 IPCPDEBUG(LOG_WARNING, ("sifup failed\n"));
mbed_official 0:51ac1d130fd4 1279 ipcp_close(f->unit, "Interface configuration failed");
mbed_official 0:51ac1d130fd4 1280 return;
mbed_official 0:51ac1d130fd4 1281 }
mbed_official 0:51ac1d130fd4 1282
mbed_official 0:51ac1d130fd4 1283 sifnpmode(f->unit, PPP_IP, NPMODE_PASS);
mbed_official 0:51ac1d130fd4 1284
mbed_official 0:51ac1d130fd4 1285 /* assign a default route through the interface if required */
mbed_official 0:51ac1d130fd4 1286 if (ipcp_wantoptions[f->unit].default_route) {
mbed_official 0:51ac1d130fd4 1287 if (sifdefaultroute(f->unit, go->ouraddr, ho->hisaddr)) {
mbed_official 0:51ac1d130fd4 1288 default_route_set[f->unit] = 1;
mbed_official 0:51ac1d130fd4 1289 }
mbed_official 0:51ac1d130fd4 1290 }
mbed_official 0:51ac1d130fd4 1291
mbed_official 0:51ac1d130fd4 1292 IPCPDEBUG(LOG_NOTICE, ("local IP address %s\n", inet_ntoa(go->ouraddr)));
mbed_official 0:51ac1d130fd4 1293 IPCPDEBUG(LOG_NOTICE, ("remote IP address %s\n", inet_ntoa(ho->hisaddr)));
mbed_official 0:51ac1d130fd4 1294 if (go->dnsaddr[0]) {
mbed_official 0:51ac1d130fd4 1295 IPCPDEBUG(LOG_NOTICE, ("primary DNS address %s\n", inet_ntoa(go->dnsaddr[0])));
mbed_official 0:51ac1d130fd4 1296 }
mbed_official 0:51ac1d130fd4 1297 if (go->dnsaddr[1]) {
mbed_official 0:51ac1d130fd4 1298 IPCPDEBUG(LOG_NOTICE, ("secondary DNS address %s\n", inet_ntoa(go->dnsaddr[1])));
mbed_official 0:51ac1d130fd4 1299 }
mbed_official 0:51ac1d130fd4 1300 }
mbed_official 0:51ac1d130fd4 1301
mbed_official 0:51ac1d130fd4 1302
mbed_official 0:51ac1d130fd4 1303 /*
mbed_official 0:51ac1d130fd4 1304 * ipcp_down - IPCP has gone DOWN.
mbed_official 0:51ac1d130fd4 1305 *
mbed_official 0:51ac1d130fd4 1306 * Take the IP network interface down, clear its addresses
mbed_official 0:51ac1d130fd4 1307 * and delete routes through it.
mbed_official 0:51ac1d130fd4 1308 */
mbed_official 0:51ac1d130fd4 1309 static void
mbed_official 0:51ac1d130fd4 1310 ipcp_down(fsm *f)
mbed_official 0:51ac1d130fd4 1311 {
mbed_official 0:51ac1d130fd4 1312 IPCPDEBUG(LOG_INFO, ("ipcp: down\n"));
mbed_official 0:51ac1d130fd4 1313 np_down(f->unit, PPP_IP);
mbed_official 0:51ac1d130fd4 1314 sifvjcomp(f->unit, 0, 0, 0);
mbed_official 0:51ac1d130fd4 1315
mbed_official 0:51ac1d130fd4 1316 sifdown(f->unit);
mbed_official 0:51ac1d130fd4 1317 ipcp_clear_addrs(f->unit);
mbed_official 0:51ac1d130fd4 1318 }
mbed_official 0:51ac1d130fd4 1319
mbed_official 0:51ac1d130fd4 1320
mbed_official 0:51ac1d130fd4 1321 /*
mbed_official 0:51ac1d130fd4 1322 * ipcp_clear_addrs() - clear the interface addresses, routes, etc.
mbed_official 0:51ac1d130fd4 1323 */
mbed_official 0:51ac1d130fd4 1324 static void
mbed_official 0:51ac1d130fd4 1325 ipcp_clear_addrs(int unit)
mbed_official 0:51ac1d130fd4 1326 {
mbed_official 0:51ac1d130fd4 1327 u32_t ouraddr, hisaddr;
mbed_official 0:51ac1d130fd4 1328
mbed_official 0:51ac1d130fd4 1329 ouraddr = ipcp_gotoptions[unit].ouraddr;
mbed_official 0:51ac1d130fd4 1330 hisaddr = ipcp_hisoptions[unit].hisaddr;
mbed_official 0:51ac1d130fd4 1331 if (default_route_set[unit]) {
mbed_official 0:51ac1d130fd4 1332 cifdefaultroute(unit, ouraddr, hisaddr);
mbed_official 0:51ac1d130fd4 1333 default_route_set[unit] = 0;
mbed_official 0:51ac1d130fd4 1334 }
mbed_official 0:51ac1d130fd4 1335 cifaddr(unit, ouraddr, hisaddr);
mbed_official 0:51ac1d130fd4 1336 }
mbed_official 0:51ac1d130fd4 1337
mbed_official 0:51ac1d130fd4 1338
mbed_official 0:51ac1d130fd4 1339 /*
mbed_official 0:51ac1d130fd4 1340 * ipcp_finished - possibly shut down the lower layers.
mbed_official 0:51ac1d130fd4 1341 */
mbed_official 0:51ac1d130fd4 1342 static void
mbed_official 0:51ac1d130fd4 1343 ipcp_finished(fsm *f)
mbed_official 0:51ac1d130fd4 1344 {
mbed_official 0:51ac1d130fd4 1345 np_finished(f->unit, PPP_IP);
mbed_official 0:51ac1d130fd4 1346 }
mbed_official 0:51ac1d130fd4 1347
mbed_official 0:51ac1d130fd4 1348 #if PPP_ADDITIONAL_CALLBACKS
mbed_official 0:51ac1d130fd4 1349 static int
mbed_official 0:51ac1d130fd4 1350 ipcp_printpkt(u_char *p, int plen, void (*printer) (void *, char *, ...), void *arg)
mbed_official 0:51ac1d130fd4 1351 {
mbed_official 0:51ac1d130fd4 1352 LWIP_UNUSED_ARG(p);
mbed_official 0:51ac1d130fd4 1353 LWIP_UNUSED_ARG(plen);
mbed_official 0:51ac1d130fd4 1354 LWIP_UNUSED_ARG(printer);
mbed_official 0:51ac1d130fd4 1355 LWIP_UNUSED_ARG(arg);
mbed_official 0:51ac1d130fd4 1356 return 0;
mbed_official 0:51ac1d130fd4 1357 }
mbed_official 0:51ac1d130fd4 1358
mbed_official 0:51ac1d130fd4 1359 /*
mbed_official 0:51ac1d130fd4 1360 * ip_active_pkt - see if this IP packet is worth bringing the link up for.
mbed_official 0:51ac1d130fd4 1361 * We don't bring the link up for IP fragments or for TCP FIN packets
mbed_official 0:51ac1d130fd4 1362 * with no data.
mbed_official 0:51ac1d130fd4 1363 */
mbed_official 0:51ac1d130fd4 1364 #define IP_HDRLEN 20 /* bytes */
mbed_official 0:51ac1d130fd4 1365 #define IP_OFFMASK 0x1fff
mbed_official 0:51ac1d130fd4 1366 #define IPPROTO_TCP 6
mbed_official 0:51ac1d130fd4 1367 #define TCP_HDRLEN 20
mbed_official 0:51ac1d130fd4 1368 #define TH_FIN 0x01
mbed_official 0:51ac1d130fd4 1369
mbed_official 0:51ac1d130fd4 1370 /*
mbed_official 0:51ac1d130fd4 1371 * We use these macros because the IP header may be at an odd address,
mbed_official 0:51ac1d130fd4 1372 * and some compilers might use word loads to get th_off or ip_hl.
mbed_official 0:51ac1d130fd4 1373 */
mbed_official 0:51ac1d130fd4 1374
mbed_official 0:51ac1d130fd4 1375 #define net_short(x) (((x)[0] << 8) + (x)[1])
mbed_official 0:51ac1d130fd4 1376 #define get_iphl(x) (((unsigned char *)(x))[0] & 0xF)
mbed_official 0:51ac1d130fd4 1377 #define get_ipoff(x) net_short((unsigned char *)(x) + 6)
mbed_official 0:51ac1d130fd4 1378 #define get_ipproto(x) (((unsigned char *)(x))[9])
mbed_official 0:51ac1d130fd4 1379 #define get_tcpoff(x) (((unsigned char *)(x))[12] >> 4)
mbed_official 0:51ac1d130fd4 1380 #define get_tcpflags(x) (((unsigned char *)(x))[13])
mbed_official 0:51ac1d130fd4 1381
mbed_official 0:51ac1d130fd4 1382 static int
mbed_official 0:51ac1d130fd4 1383 ip_active_pkt(u_char *pkt, int len)
mbed_official 0:51ac1d130fd4 1384 {
mbed_official 0:51ac1d130fd4 1385 u_char *tcp;
mbed_official 0:51ac1d130fd4 1386 int hlen;
mbed_official 0:51ac1d130fd4 1387
mbed_official 0:51ac1d130fd4 1388 len -= PPP_HDRLEN;
mbed_official 0:51ac1d130fd4 1389 pkt += PPP_HDRLEN;
mbed_official 0:51ac1d130fd4 1390 if (len < IP_HDRLEN) {
mbed_official 0:51ac1d130fd4 1391 return 0;
mbed_official 0:51ac1d130fd4 1392 }
mbed_official 0:51ac1d130fd4 1393 if ((get_ipoff(pkt) & IP_OFFMASK) != 0) {
mbed_official 0:51ac1d130fd4 1394 return 0;
mbed_official 0:51ac1d130fd4 1395 }
mbed_official 0:51ac1d130fd4 1396 if (get_ipproto(pkt) != IPPROTO_TCP) {
mbed_official 0:51ac1d130fd4 1397 return 1;
mbed_official 0:51ac1d130fd4 1398 }
mbed_official 0:51ac1d130fd4 1399 hlen = get_iphl(pkt) * 4;
mbed_official 0:51ac1d130fd4 1400 if (len < hlen + TCP_HDRLEN) {
mbed_official 0:51ac1d130fd4 1401 return 0;
mbed_official 0:51ac1d130fd4 1402 }
mbed_official 0:51ac1d130fd4 1403 tcp = pkt + hlen;
mbed_official 0:51ac1d130fd4 1404 if ((get_tcpflags(tcp) & TH_FIN) != 0 && len == hlen + get_tcpoff(tcp) * 4) {
mbed_official 0:51ac1d130fd4 1405 return 0;
mbed_official 0:51ac1d130fd4 1406 }
mbed_official 0:51ac1d130fd4 1407 return 1;
mbed_official 0:51ac1d130fd4 1408 }
mbed_official 0:51ac1d130fd4 1409 #endif /* PPP_ADDITIONAL_CALLBACKS */
mbed_official 0:51ac1d130fd4 1410
mbed_official 0:51ac1d130fd4 1411 #endif /* PPP_SUPPORT */