Jonathan Caes / InetTest-8d87bc453349

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Dependencies:   DS1307 TextLCD mbed

InetTest-8d87bc453349/NetServices/lwip/netif/ppp/ipcp.c@0:a16f60a71395, 2014-12-18 (annotated)

Committer:
JonathanCaes
Date:
Thu Dec 18 10:34:38 2014 +0000
Revision:
0:a16f60a71395
Project C mbed

Who changed what in which revision?

UserRevisionLine numberNew contents of line
JonathanCaes 0:a16f60a71395 1 /** In contrast to pppd 2.3.1, DNS support has been added, proxy-ARP and
JonathanCaes 0:a16f60a71395 2 dial-on-demand has been stripped. */
JonathanCaes 0:a16f60a71395 3 /*****************************************************************************
JonathanCaes 0:a16f60a71395 4 * ipcp.c - Network PPP IP Control Protocol program file.
JonathanCaes 0:a16f60a71395 5 *
JonathanCaes 0:a16f60a71395 6 * Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
JonathanCaes 0:a16f60a71395 7 * portions Copyright (c) 1997 by Global Election Systems Inc.
JonathanCaes 0:a16f60a71395 8 *
JonathanCaes 0:a16f60a71395 9 * The authors hereby grant permission to use, copy, modify, distribute,
JonathanCaes 0:a16f60a71395 10 * and license this software and its documentation for any purpose, provided
JonathanCaes 0:a16f60a71395 11 * that existing copyright notices are retained in all copies and that this
JonathanCaes 0:a16f60a71395 12 * notice and the following disclaimer are included verbatim in any
JonathanCaes 0:a16f60a71395 13 * distributions. No written agreement, license, or royalty fee is required
JonathanCaes 0:a16f60a71395 14 * for any of the authorized uses.
JonathanCaes 0:a16f60a71395 15 *
JonathanCaes 0:a16f60a71395 16 * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
JonathanCaes 0:a16f60a71395 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
JonathanCaes 0:a16f60a71395 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
JonathanCaes 0:a16f60a71395 19 * IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
JonathanCaes 0:a16f60a71395 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
JonathanCaes 0:a16f60a71395 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
JonathanCaes 0:a16f60a71395 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
JonathanCaes 0:a16f60a71395 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
JonathanCaes 0:a16f60a71395 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
JonathanCaes 0:a16f60a71395 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
JonathanCaes 0:a16f60a71395 26 *
JonathanCaes 0:a16f60a71395 27 ******************************************************************************
JonathanCaes 0:a16f60a71395 28 * REVISION HISTORY
JonathanCaes 0:a16f60a71395 29 *
JonathanCaes 0:a16f60a71395 30 * 03-01-01 Marc Boucher <marc@mbsi.ca>
JonathanCaes 0:a16f60a71395 31 * Ported to lwIP.
JonathanCaes 0:a16f60a71395 32 * 97-12-08 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
JonathanCaes 0:a16f60a71395 33 * Original.
JonathanCaes 0:a16f60a71395 34 *****************************************************************************/
JonathanCaes 0:a16f60a71395 35 /*
JonathanCaes 0:a16f60a71395 36 * ipcp.c - PPP IP Control Protocol.
JonathanCaes 0:a16f60a71395 37 *
JonathanCaes 0:a16f60a71395 38 * Copyright (c) 1989 Carnegie Mellon University.
JonathanCaes 0:a16f60a71395 39 * All rights reserved.
JonathanCaes 0:a16f60a71395 40 *
JonathanCaes 0:a16f60a71395 41 * Redistribution and use in source and binary forms are permitted
JonathanCaes 0:a16f60a71395 42 * provided that the above copyright notice and this paragraph are
JonathanCaes 0:a16f60a71395 43 * duplicated in all such forms and that any documentation,
JonathanCaes 0:a16f60a71395 44 * advertising materials, and other materials related to such
JonathanCaes 0:a16f60a71395 45 * distribution and use acknowledge that the software was developed
JonathanCaes 0:a16f60a71395 46 * by Carnegie Mellon University. The name of the
JonathanCaes 0:a16f60a71395 47 * University may not be used to endorse or promote products derived
JonathanCaes 0:a16f60a71395 48 * from this software without specific prior written permission.
JonathanCaes 0:a16f60a71395 49 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
JonathanCaes 0:a16f60a71395 50 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
JonathanCaes 0:a16f60a71395 51 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
JonathanCaes 0:a16f60a71395 52 */
JonathanCaes 0:a16f60a71395 53
JonathanCaes 0:a16f60a71395 54 #include "lwip/opt.h"
JonathanCaes 0:a16f60a71395 55
JonathanCaes 0:a16f60a71395 56 #if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
JonathanCaes 0:a16f60a71395 57
JonathanCaes 0:a16f60a71395 58 #include "ppp.h"
JonathanCaes 0:a16f60a71395 59 #include "pppdebug.h"
JonathanCaes 0:a16f60a71395 60
JonathanCaes 0:a16f60a71395 61 #include "auth.h"
JonathanCaes 0:a16f60a71395 62 #include "fsm.h"
JonathanCaes 0:a16f60a71395 63 #include "vj.h"
JonathanCaes 0:a16f60a71395 64 #include "ipcp.h"
JonathanCaes 0:a16f60a71395 65
JonathanCaes 0:a16f60a71395 66 #include "lwip/inet.h"
JonathanCaes 0:a16f60a71395 67
JonathanCaes 0:a16f60a71395 68 #include <string.h>
JonathanCaes 0:a16f60a71395 69
JonathanCaes 0:a16f60a71395 70 /* #define OLD_CI_ADDRS 1 */ /* Support deprecated address negotiation. */
JonathanCaes 0:a16f60a71395 71
JonathanCaes 0:a16f60a71395 72 /* global vars */
JonathanCaes 0:a16f60a71395 73 ipcp_options ipcp_wantoptions[NUM_PPP]; /* Options that we want to request */
JonathanCaes 0:a16f60a71395 74 ipcp_options ipcp_gotoptions[NUM_PPP]; /* Options that peer ack'd */
JonathanCaes 0:a16f60a71395 75 ipcp_options ipcp_allowoptions[NUM_PPP]; /* Options we allow peer to request */
JonathanCaes 0:a16f60a71395 76 ipcp_options ipcp_hisoptions[NUM_PPP]; /* Options that we ack'd */
JonathanCaes 0:a16f60a71395 77
JonathanCaes 0:a16f60a71395 78 /* local vars */
JonathanCaes 0:a16f60a71395 79 static int default_route_set[NUM_PPP]; /* Have set up a default route */
JonathanCaes 0:a16f60a71395 80 static int cis_received[NUM_PPP]; /* # Conf-Reqs received */
JonathanCaes 0:a16f60a71395 81
JonathanCaes 0:a16f60a71395 82
JonathanCaes 0:a16f60a71395 83 /*
JonathanCaes 0:a16f60a71395 84 * Callbacks for fsm code. (CI = Configuration Information)
JonathanCaes 0:a16f60a71395 85 */
JonathanCaes 0:a16f60a71395 86 static void ipcp_resetci (fsm *); /* Reset our CI */
JonathanCaes 0:a16f60a71395 87 static int ipcp_cilen (fsm *); /* Return length of our CI */
JonathanCaes 0:a16f60a71395 88 static void ipcp_addci (fsm *, u_char *, int *); /* Add our CI */
JonathanCaes 0:a16f60a71395 89 static int ipcp_ackci (fsm *, u_char *, int); /* Peer ack'd our CI */
JonathanCaes 0:a16f60a71395 90 static int ipcp_nakci (fsm *, u_char *, int); /* Peer nak'd our CI */
JonathanCaes 0:a16f60a71395 91 static int ipcp_rejci (fsm *, u_char *, int); /* Peer rej'd our CI */
JonathanCaes 0:a16f60a71395 92 static int ipcp_reqci (fsm *, u_char *, int *, int); /* Rcv CI */
JonathanCaes 0:a16f60a71395 93 static void ipcp_up (fsm *); /* We're UP */
JonathanCaes 0:a16f60a71395 94 static void ipcp_down (fsm *); /* We're DOWN */
JonathanCaes 0:a16f60a71395 95 #if PPP_ADDITIONAL_CALLBACKS
JonathanCaes 0:a16f60a71395 96 static void ipcp_script (fsm *, char *); /* Run an up/down script */
JonathanCaes 0:a16f60a71395 97 #endif
JonathanCaes 0:a16f60a71395 98 static void ipcp_finished (fsm *); /* Don't need lower layer */
JonathanCaes 0:a16f60a71395 99
JonathanCaes 0:a16f60a71395 100
JonathanCaes 0:a16f60a71395 101 fsm ipcp_fsm[NUM_PPP]; /* IPCP fsm structure */
JonathanCaes 0:a16f60a71395 102
JonathanCaes 0:a16f60a71395 103
JonathanCaes 0:a16f60a71395 104 static fsm_callbacks ipcp_callbacks = { /* IPCP callback routines */
JonathanCaes 0:a16f60a71395 105 ipcp_resetci, /* Reset our Configuration Information */
JonathanCaes 0:a16f60a71395 106 ipcp_cilen, /* Length of our Configuration Information */
JonathanCaes 0:a16f60a71395 107 ipcp_addci, /* Add our Configuration Information */
JonathanCaes 0:a16f60a71395 108 ipcp_ackci, /* ACK our Configuration Information */
JonathanCaes 0:a16f60a71395 109 ipcp_nakci, /* NAK our Configuration Information */
JonathanCaes 0:a16f60a71395 110 ipcp_rejci, /* Reject our Configuration Information */
JonathanCaes 0:a16f60a71395 111 ipcp_reqci, /* Request peer's Configuration Information */
JonathanCaes 0:a16f60a71395 112 ipcp_up, /* Called when fsm reaches LS_OPENED state */
JonathanCaes 0:a16f60a71395 113 ipcp_down, /* Called when fsm leaves LS_OPENED state */
JonathanCaes 0:a16f60a71395 114 NULL, /* Called when we want the lower layer up */
JonathanCaes 0:a16f60a71395 115 ipcp_finished, /* Called when we want the lower layer down */
JonathanCaes 0:a16f60a71395 116 NULL, /* Called when Protocol-Reject received */
JonathanCaes 0:a16f60a71395 117 NULL, /* Retransmission is necessary */
JonathanCaes 0:a16f60a71395 118 NULL, /* Called to handle protocol-specific codes */
JonathanCaes 0:a16f60a71395 119 "IPCP" /* String name of protocol */
JonathanCaes 0:a16f60a71395 120 };
JonathanCaes 0:a16f60a71395 121
JonathanCaes 0:a16f60a71395 122 /*
JonathanCaes 0:a16f60a71395 123 * Protocol entry points from main code.
JonathanCaes 0:a16f60a71395 124 */
JonathanCaes 0:a16f60a71395 125 static void ipcp_init (int);
JonathanCaes 0:a16f60a71395 126 static void ipcp_open (int);
JonathanCaes 0:a16f60a71395 127 static void ipcp_close (int, char *);
JonathanCaes 0:a16f60a71395 128 static void ipcp_lowerup (int);
JonathanCaes 0:a16f60a71395 129 static void ipcp_lowerdown (int);
JonathanCaes 0:a16f60a71395 130 static void ipcp_input (int, u_char *, int);
JonathanCaes 0:a16f60a71395 131 static void ipcp_protrej (int);
JonathanCaes 0:a16f60a71395 132
JonathanCaes 0:a16f60a71395 133
JonathanCaes 0:a16f60a71395 134 struct protent ipcp_protent = {
JonathanCaes 0:a16f60a71395 135 PPP_IPCP,
JonathanCaes 0:a16f60a71395 136 ipcp_init,
JonathanCaes 0:a16f60a71395 137 ipcp_input,
JonathanCaes 0:a16f60a71395 138 ipcp_protrej,
JonathanCaes 0:a16f60a71395 139 ipcp_lowerup,
JonathanCaes 0:a16f60a71395 140 ipcp_lowerdown,
JonathanCaes 0:a16f60a71395 141 ipcp_open,
JonathanCaes 0:a16f60a71395 142 ipcp_close,
JonathanCaes 0:a16f60a71395 143 #if PPP_ADDITIONAL_CALLBACKS
JonathanCaes 0:a16f60a71395 144 ipcp_printpkt,
JonathanCaes 0:a16f60a71395 145 NULL,
JonathanCaes 0:a16f60a71395 146 #endif /* PPP_ADDITIONAL_CALLBACKS */
JonathanCaes 0:a16f60a71395 147 1,
JonathanCaes 0:a16f60a71395 148 "IPCP",
JonathanCaes 0:a16f60a71395 149 #if PPP_ADDITIONAL_CALLBACKS
JonathanCaes 0:a16f60a71395 150 ip_check_options,
JonathanCaes 0:a16f60a71395 151 NULL,
JonathanCaes 0:a16f60a71395 152 ip_active_pkt
JonathanCaes 0:a16f60a71395 153 #endif /* PPP_ADDITIONAL_CALLBACKS */
JonathanCaes 0:a16f60a71395 154 };
JonathanCaes 0:a16f60a71395 155
JonathanCaes 0:a16f60a71395 156 static void ipcp_clear_addrs (int);
JonathanCaes 0:a16f60a71395 157
JonathanCaes 0:a16f60a71395 158 /*
JonathanCaes 0:a16f60a71395 159 * Lengths of configuration options.
JonathanCaes 0:a16f60a71395 160 */
JonathanCaes 0:a16f60a71395 161 #define CILEN_VOID 2
JonathanCaes 0:a16f60a71395 162 #define CILEN_COMPRESS 4 /* min length for compression protocol opt. */
JonathanCaes 0:a16f60a71395 163 #define CILEN_VJ 6 /* length for RFC1332 Van-Jacobson opt. */
JonathanCaes 0:a16f60a71395 164 #define CILEN_ADDR 6 /* new-style single address option */
JonathanCaes 0:a16f60a71395 165 #define CILEN_ADDRS 10 /* old-style dual address option */
JonathanCaes 0:a16f60a71395 166
JonathanCaes 0:a16f60a71395 167
JonathanCaes 0:a16f60a71395 168 #define CODENAME(x) ((x) == CONFACK ? "ACK" : \
JonathanCaes 0:a16f60a71395 169 (x) == CONFNAK ? "NAK" : "REJ")
JonathanCaes 0:a16f60a71395 170
JonathanCaes 0:a16f60a71395 171
JonathanCaes 0:a16f60a71395 172 /*
JonathanCaes 0:a16f60a71395 173 * ipcp_init - Initialize IPCP.
JonathanCaes 0:a16f60a71395 174 */
JonathanCaes 0:a16f60a71395 175 static void
JonathanCaes 0:a16f60a71395 176 ipcp_init(int unit)
JonathanCaes 0:a16f60a71395 177 {
JonathanCaes 0:a16f60a71395 178 fsm *f = &ipcp_fsm[unit];
JonathanCaes 0:a16f60a71395 179 ipcp_options *wo = &ipcp_wantoptions[unit];
JonathanCaes 0:a16f60a71395 180 ipcp_options *ao = &ipcp_allowoptions[unit];
JonathanCaes 0:a16f60a71395 181
JonathanCaes 0:a16f60a71395 182 f->unit = unit;
JonathanCaes 0:a16f60a71395 183 f->protocol = PPP_IPCP;
JonathanCaes 0:a16f60a71395 184 f->callbacks = &ipcp_callbacks;
JonathanCaes 0:a16f60a71395 185 fsm_init(&ipcp_fsm[unit]);
JonathanCaes 0:a16f60a71395 186
JonathanCaes 0:a16f60a71395 187 memset(wo, 0, sizeof(*wo));
JonathanCaes 0:a16f60a71395 188 memset(ao, 0, sizeof(*ao));
JonathanCaes 0:a16f60a71395 189
JonathanCaes 0:a16f60a71395 190 wo->neg_addr = 1;
JonathanCaes 0:a16f60a71395 191 wo->ouraddr = 0;
JonathanCaes 0:a16f60a71395 192 #if VJ_SUPPORT
JonathanCaes 0:a16f60a71395 193 wo->neg_vj = 1;
JonathanCaes 0:a16f60a71395 194 #else /* VJ_SUPPORT */
JonathanCaes 0:a16f60a71395 195 wo->neg_vj = 0;
JonathanCaes 0:a16f60a71395 196 #endif /* VJ_SUPPORT */
JonathanCaes 0:a16f60a71395 197 wo->vj_protocol = IPCP_VJ_COMP;
JonathanCaes 0:a16f60a71395 198 wo->maxslotindex = MAX_SLOTS - 1;
JonathanCaes 0:a16f60a71395 199 wo->cflag = 0;
JonathanCaes 0:a16f60a71395 200 wo->default_route = 1;
JonathanCaes 0:a16f60a71395 201
JonathanCaes 0:a16f60a71395 202 ao->neg_addr = 1;
JonathanCaes 0:a16f60a71395 203 #if VJ_SUPPORT
JonathanCaes 0:a16f60a71395 204 ao->neg_vj = 1;
JonathanCaes 0:a16f60a71395 205 #else /* VJ_SUPPORT */
JonathanCaes 0:a16f60a71395 206 ao->neg_vj = 0;
JonathanCaes 0:a16f60a71395 207 #endif /* VJ_SUPPORT */
JonathanCaes 0:a16f60a71395 208 ao->maxslotindex = MAX_SLOTS - 1;
JonathanCaes 0:a16f60a71395 209 ao->cflag = 1;
JonathanCaes 0:a16f60a71395 210 ao->default_route = 1;
JonathanCaes 0:a16f60a71395 211 }
JonathanCaes 0:a16f60a71395 212
JonathanCaes 0:a16f60a71395 213
JonathanCaes 0:a16f60a71395 214 /*
JonathanCaes 0:a16f60a71395 215 * ipcp_open - IPCP is allowed to come up.
JonathanCaes 0:a16f60a71395 216 */
JonathanCaes 0:a16f60a71395 217 static void
JonathanCaes 0:a16f60a71395 218 ipcp_open(int unit)
JonathanCaes 0:a16f60a71395 219 {
JonathanCaes 0:a16f60a71395 220 fsm_open(&ipcp_fsm[unit]);
JonathanCaes 0:a16f60a71395 221 }
JonathanCaes 0:a16f60a71395 222
JonathanCaes 0:a16f60a71395 223
JonathanCaes 0:a16f60a71395 224 /*
JonathanCaes 0:a16f60a71395 225 * ipcp_close - Take IPCP down.
JonathanCaes 0:a16f60a71395 226 */
JonathanCaes 0:a16f60a71395 227 static void
JonathanCaes 0:a16f60a71395 228 ipcp_close(int unit, char *reason)
JonathanCaes 0:a16f60a71395 229 {
JonathanCaes 0:a16f60a71395 230 fsm_close(&ipcp_fsm[unit], reason);
JonathanCaes 0:a16f60a71395 231 }
JonathanCaes 0:a16f60a71395 232
JonathanCaes 0:a16f60a71395 233
JonathanCaes 0:a16f60a71395 234 /*
JonathanCaes 0:a16f60a71395 235 * ipcp_lowerup - The lower layer is up.
JonathanCaes 0:a16f60a71395 236 */
JonathanCaes 0:a16f60a71395 237 static void
JonathanCaes 0:a16f60a71395 238 ipcp_lowerup(int unit)
JonathanCaes 0:a16f60a71395 239 {
JonathanCaes 0:a16f60a71395 240 fsm_lowerup(&ipcp_fsm[unit]);
JonathanCaes 0:a16f60a71395 241 }
JonathanCaes 0:a16f60a71395 242
JonathanCaes 0:a16f60a71395 243
JonathanCaes 0:a16f60a71395 244 /*
JonathanCaes 0:a16f60a71395 245 * ipcp_lowerdown - The lower layer is down.
JonathanCaes 0:a16f60a71395 246 */
JonathanCaes 0:a16f60a71395 247 static void
JonathanCaes 0:a16f60a71395 248 ipcp_lowerdown(int unit)
JonathanCaes 0:a16f60a71395 249 {
JonathanCaes 0:a16f60a71395 250 fsm_lowerdown(&ipcp_fsm[unit]);
JonathanCaes 0:a16f60a71395 251 }
JonathanCaes 0:a16f60a71395 252
JonathanCaes 0:a16f60a71395 253
JonathanCaes 0:a16f60a71395 254 /*
JonathanCaes 0:a16f60a71395 255 * ipcp_input - Input IPCP packet.
JonathanCaes 0:a16f60a71395 256 */
JonathanCaes 0:a16f60a71395 257 static void
JonathanCaes 0:a16f60a71395 258 ipcp_input(int unit, u_char *p, int len)
JonathanCaes 0:a16f60a71395 259 {
JonathanCaes 0:a16f60a71395 260 fsm_input(&ipcp_fsm[unit], p, len);
JonathanCaes 0:a16f60a71395 261 }
JonathanCaes 0:a16f60a71395 262
JonathanCaes 0:a16f60a71395 263
JonathanCaes 0:a16f60a71395 264 /*
JonathanCaes 0:a16f60a71395 265 * ipcp_protrej - A Protocol-Reject was received for IPCP.
JonathanCaes 0:a16f60a71395 266 *
JonathanCaes 0:a16f60a71395 267 * Pretend the lower layer went down, so we shut up.
JonathanCaes 0:a16f60a71395 268 */
JonathanCaes 0:a16f60a71395 269 static void
JonathanCaes 0:a16f60a71395 270 ipcp_protrej(int unit)
JonathanCaes 0:a16f60a71395 271 {
JonathanCaes 0:a16f60a71395 272 fsm_lowerdown(&ipcp_fsm[unit]);
JonathanCaes 0:a16f60a71395 273 }
JonathanCaes 0:a16f60a71395 274
JonathanCaes 0:a16f60a71395 275
JonathanCaes 0:a16f60a71395 276 /*
JonathanCaes 0:a16f60a71395 277 * ipcp_resetci - Reset our CI.
JonathanCaes 0:a16f60a71395 278 */
JonathanCaes 0:a16f60a71395 279 static void
JonathanCaes 0:a16f60a71395 280 ipcp_resetci(fsm *f)
JonathanCaes 0:a16f60a71395 281 {
JonathanCaes 0:a16f60a71395 282 ipcp_options *wo = &ipcp_wantoptions[f->unit];
JonathanCaes 0:a16f60a71395 283
JonathanCaes 0:a16f60a71395 284 wo->req_addr = wo->neg_addr && ipcp_allowoptions[f->unit].neg_addr;
JonathanCaes 0:a16f60a71395 285 if (wo->ouraddr == 0) {
JonathanCaes 0:a16f60a71395 286 wo->accept_local = 1;
JonathanCaes 0:a16f60a71395 287 }
JonathanCaes 0:a16f60a71395 288 if (wo->hisaddr == 0) {
JonathanCaes 0:a16f60a71395 289 wo->accept_remote = 1;
JonathanCaes 0:a16f60a71395 290 }
JonathanCaes 0:a16f60a71395 291 /* Request DNS addresses from the peer */
JonathanCaes 0:a16f60a71395 292 wo->req_dns1 = ppp_settings.usepeerdns;
JonathanCaes 0:a16f60a71395 293 wo->req_dns2 = ppp_settings.usepeerdns;
JonathanCaes 0:a16f60a71395 294 ipcp_gotoptions[f->unit] = *wo;
JonathanCaes 0:a16f60a71395 295 cis_received[f->unit] = 0;
JonathanCaes 0:a16f60a71395 296 }
JonathanCaes 0:a16f60a71395 297
JonathanCaes 0:a16f60a71395 298
JonathanCaes 0:a16f60a71395 299 /*
JonathanCaes 0:a16f60a71395 300 * ipcp_cilen - Return length of our CI.
JonathanCaes 0:a16f60a71395 301 */
JonathanCaes 0:a16f60a71395 302 static int
JonathanCaes 0:a16f60a71395 303 ipcp_cilen(fsm *f)
JonathanCaes 0:a16f60a71395 304 {
JonathanCaes 0:a16f60a71395 305 ipcp_options *go = &ipcp_gotoptions[f->unit];
JonathanCaes 0:a16f60a71395 306 ipcp_options *wo = &ipcp_wantoptions[f->unit];
JonathanCaes 0:a16f60a71395 307 ipcp_options *ho = &ipcp_hisoptions[f->unit];
JonathanCaes 0:a16f60a71395 308
JonathanCaes 0:a16f60a71395 309 #define LENCIVJ(neg, old) (neg ? (old? CILEN_COMPRESS : CILEN_VJ) : 0)
JonathanCaes 0:a16f60a71395 310 #define LENCIADDR(neg, old) (neg ? (old? CILEN_ADDRS : CILEN_ADDR) : 0)
JonathanCaes 0:a16f60a71395 311 #define LENCIDNS(neg) (neg ? (CILEN_ADDR) : 0)
JonathanCaes 0:a16f60a71395 312
JonathanCaes 0:a16f60a71395 313 /*
JonathanCaes 0:a16f60a71395 314 * First see if we want to change our options to the old
JonathanCaes 0:a16f60a71395 315 * forms because we have received old forms from the peer.
JonathanCaes 0:a16f60a71395 316 */
JonathanCaes 0:a16f60a71395 317 if (wo->neg_addr && !go->neg_addr && !go->old_addrs) {
JonathanCaes 0:a16f60a71395 318 /* use the old style of address negotiation */
JonathanCaes 0:a16f60a71395 319 go->neg_addr = 1;
JonathanCaes 0:a16f60a71395 320 go->old_addrs = 1;
JonathanCaes 0:a16f60a71395 321 }
JonathanCaes 0:a16f60a71395 322 if (wo->neg_vj && !go->neg_vj && !go->old_vj) {
JonathanCaes 0:a16f60a71395 323 /* try an older style of VJ negotiation */
JonathanCaes 0:a16f60a71395 324 if (cis_received[f->unit] == 0) {
JonathanCaes 0:a16f60a71395 325 /* keep trying the new style until we see some CI from the peer */
JonathanCaes 0:a16f60a71395 326 go->neg_vj = 1;
JonathanCaes 0:a16f60a71395 327 } else {
JonathanCaes 0:a16f60a71395 328 /* use the old style only if the peer did */
JonathanCaes 0:a16f60a71395 329 if (ho->neg_vj && ho->old_vj) {
JonathanCaes 0:a16f60a71395 330 go->neg_vj = 1;
JonathanCaes 0:a16f60a71395 331 go->old_vj = 1;
JonathanCaes 0:a16f60a71395 332 go->vj_protocol = ho->vj_protocol;
JonathanCaes 0:a16f60a71395 333 }
JonathanCaes 0:a16f60a71395 334 }
JonathanCaes 0:a16f60a71395 335 }
JonathanCaes 0:a16f60a71395 336
JonathanCaes 0:a16f60a71395 337 return (LENCIADDR(go->neg_addr, go->old_addrs) +
JonathanCaes 0:a16f60a71395 338 LENCIVJ(go->neg_vj, go->old_vj) +
JonathanCaes 0:a16f60a71395 339 LENCIDNS(go->req_dns1) +
JonathanCaes 0:a16f60a71395 340 LENCIDNS(go->req_dns2));
JonathanCaes 0:a16f60a71395 341 }
JonathanCaes 0:a16f60a71395 342
JonathanCaes 0:a16f60a71395 343
JonathanCaes 0:a16f60a71395 344 /*
JonathanCaes 0:a16f60a71395 345 * ipcp_addci - Add our desired CIs to a packet.
JonathanCaes 0:a16f60a71395 346 */
JonathanCaes 0:a16f60a71395 347 static void
JonathanCaes 0:a16f60a71395 348 ipcp_addci(fsm *f, u_char *ucp, int *lenp)
JonathanCaes 0:a16f60a71395 349 {
JonathanCaes 0:a16f60a71395 350 ipcp_options *go = &ipcp_gotoptions[f->unit];
JonathanCaes 0:a16f60a71395 351 int len = *lenp;
JonathanCaes 0:a16f60a71395 352
JonathanCaes 0:a16f60a71395 353 #define ADDCIVJ(opt, neg, val, old, maxslotindex, cflag) \
JonathanCaes 0:a16f60a71395 354 if (neg) { \
JonathanCaes 0:a16f60a71395 355 int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \
JonathanCaes 0:a16f60a71395 356 if (len >= vjlen) { \
JonathanCaes 0:a16f60a71395 357 PUTCHAR(opt, ucp); \
JonathanCaes 0:a16f60a71395 358 PUTCHAR(vjlen, ucp); \
JonathanCaes 0:a16f60a71395 359 PUTSHORT(val, ucp); \
JonathanCaes 0:a16f60a71395 360 if (!old) { \
JonathanCaes 0:a16f60a71395 361 PUTCHAR(maxslotindex, ucp); \
JonathanCaes 0:a16f60a71395 362 PUTCHAR(cflag, ucp); \
JonathanCaes 0:a16f60a71395 363 } \
JonathanCaes 0:a16f60a71395 364 len -= vjlen; \
JonathanCaes 0:a16f60a71395 365 } else { \
JonathanCaes 0:a16f60a71395 366 neg = 0; \
JonathanCaes 0:a16f60a71395 367 } \
JonathanCaes 0:a16f60a71395 368 }
JonathanCaes 0:a16f60a71395 369
JonathanCaes 0:a16f60a71395 370 #define ADDCIADDR(opt, neg, old, val1, val2) \
JonathanCaes 0:a16f60a71395 371 if (neg) { \
JonathanCaes 0:a16f60a71395 372 int addrlen = (old? CILEN_ADDRS: CILEN_ADDR); \
JonathanCaes 0:a16f60a71395 373 if (len >= addrlen) { \
JonathanCaes 0:a16f60a71395 374 u32_t l; \
JonathanCaes 0:a16f60a71395 375 PUTCHAR(opt, ucp); \
JonathanCaes 0:a16f60a71395 376 PUTCHAR(addrlen, ucp); \
JonathanCaes 0:a16f60a71395 377 l = ntohl(val1); \
JonathanCaes 0:a16f60a71395 378 PUTLONG(l, ucp); \
JonathanCaes 0:a16f60a71395 379 if (old) { \
JonathanCaes 0:a16f60a71395 380 l = ntohl(val2); \
JonathanCaes 0:a16f60a71395 381 PUTLONG(l, ucp); \
JonathanCaes 0:a16f60a71395 382 } \
JonathanCaes 0:a16f60a71395 383 len -= addrlen; \
JonathanCaes 0:a16f60a71395 384 } else { \
JonathanCaes 0:a16f60a71395 385 neg = 0; \
JonathanCaes 0:a16f60a71395 386 } \
JonathanCaes 0:a16f60a71395 387 }
JonathanCaes 0:a16f60a71395 388
JonathanCaes 0:a16f60a71395 389 #define ADDCIDNS(opt, neg, addr) \
JonathanCaes 0:a16f60a71395 390 if (neg) { \
JonathanCaes 0:a16f60a71395 391 if (len >= CILEN_ADDR) { \
JonathanCaes 0:a16f60a71395 392 u32_t l; \
JonathanCaes 0:a16f60a71395 393 PUTCHAR(opt, ucp); \
JonathanCaes 0:a16f60a71395 394 PUTCHAR(CILEN_ADDR, ucp); \
JonathanCaes 0:a16f60a71395 395 l = ntohl(addr); \
JonathanCaes 0:a16f60a71395 396 PUTLONG(l, ucp); \
JonathanCaes 0:a16f60a71395 397 len -= CILEN_ADDR; \
JonathanCaes 0:a16f60a71395 398 } else { \
JonathanCaes 0:a16f60a71395 399 neg = 0; \
JonathanCaes 0:a16f60a71395 400 } \
JonathanCaes 0:a16f60a71395 401 }
JonathanCaes 0:a16f60a71395 402
JonathanCaes 0:a16f60a71395 403 ADDCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), go->neg_addr,
JonathanCaes 0:a16f60a71395 404 go->old_addrs, go->ouraddr, go->hisaddr);
JonathanCaes 0:a16f60a71395 405
JonathanCaes 0:a16f60a71395 406 ADDCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj,
JonathanCaes 0:a16f60a71395 407 go->maxslotindex, go->cflag);
JonathanCaes 0:a16f60a71395 408
JonathanCaes 0:a16f60a71395 409 ADDCIDNS(CI_MS_DNS1, go->req_dns1, go->dnsaddr[0]);
JonathanCaes 0:a16f60a71395 410
JonathanCaes 0:a16f60a71395 411 ADDCIDNS(CI_MS_DNS2, go->req_dns2, go->dnsaddr[1]);
JonathanCaes 0:a16f60a71395 412
JonathanCaes 0:a16f60a71395 413 *lenp -= len;
JonathanCaes 0:a16f60a71395 414 }
JonathanCaes 0:a16f60a71395 415
JonathanCaes 0:a16f60a71395 416
JonathanCaes 0:a16f60a71395 417 /*
JonathanCaes 0:a16f60a71395 418 * ipcp_ackci - Ack our CIs.
JonathanCaes 0:a16f60a71395 419 *
JonathanCaes 0:a16f60a71395 420 * Returns:
JonathanCaes 0:a16f60a71395 421 * 0 - Ack was bad.
JonathanCaes 0:a16f60a71395 422 * 1 - Ack was good.
JonathanCaes 0:a16f60a71395 423 */
JonathanCaes 0:a16f60a71395 424 static int
JonathanCaes 0:a16f60a71395 425 ipcp_ackci(fsm *f, u_char *p, int len)
JonathanCaes 0:a16f60a71395 426 {
JonathanCaes 0:a16f60a71395 427 ipcp_options *go = &ipcp_gotoptions[f->unit];
JonathanCaes 0:a16f60a71395 428 u_short cilen, citype, cishort;
JonathanCaes 0:a16f60a71395 429 u32_t cilong;
JonathanCaes 0:a16f60a71395 430 u_char cimaxslotindex, cicflag;
JonathanCaes 0:a16f60a71395 431
JonathanCaes 0:a16f60a71395 432 /*
JonathanCaes 0:a16f60a71395 433 * CIs must be in exactly the same order that we sent...
JonathanCaes 0:a16f60a71395 434 * Check packet length and CI length at each step.
JonathanCaes 0:a16f60a71395 435 * If we find any deviations, then this packet is bad.
JonathanCaes 0:a16f60a71395 436 */
JonathanCaes 0:a16f60a71395 437
JonathanCaes 0:a16f60a71395 438 #define ACKCIVJ(opt, neg, val, old, maxslotindex, cflag) \
JonathanCaes 0:a16f60a71395 439 if (neg) { \
JonathanCaes 0:a16f60a71395 440 int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \
JonathanCaes 0:a16f60a71395 441 if ((len -= vjlen) < 0) { \
JonathanCaes 0:a16f60a71395 442 goto bad; \
JonathanCaes 0:a16f60a71395 443 } \
JonathanCaes 0:a16f60a71395 444 GETCHAR(citype, p); \
JonathanCaes 0:a16f60a71395 445 GETCHAR(cilen, p); \
JonathanCaes 0:a16f60a71395 446 if (cilen != vjlen || \
JonathanCaes 0:a16f60a71395 447 citype != opt) { \
JonathanCaes 0:a16f60a71395 448 goto bad; \
JonathanCaes 0:a16f60a71395 449 } \
JonathanCaes 0:a16f60a71395 450 GETSHORT(cishort, p); \
JonathanCaes 0:a16f60a71395 451 if (cishort != val) { \
JonathanCaes 0:a16f60a71395 452 goto bad; \
JonathanCaes 0:a16f60a71395 453 } \
JonathanCaes 0:a16f60a71395 454 if (!old) { \
JonathanCaes 0:a16f60a71395 455 GETCHAR(cimaxslotindex, p); \
JonathanCaes 0:a16f60a71395 456 if (cimaxslotindex != maxslotindex) { \
JonathanCaes 0:a16f60a71395 457 goto bad; \
JonathanCaes 0:a16f60a71395 458 } \
JonathanCaes 0:a16f60a71395 459 GETCHAR(cicflag, p); \
JonathanCaes 0:a16f60a71395 460 if (cicflag != cflag) { \
JonathanCaes 0:a16f60a71395 461 goto bad; \
JonathanCaes 0:a16f60a71395 462 } \
JonathanCaes 0:a16f60a71395 463 } \
JonathanCaes 0:a16f60a71395 464 }
JonathanCaes 0:a16f60a71395 465
JonathanCaes 0:a16f60a71395 466 #define ACKCIADDR(opt, neg, old, val1, val2) \
JonathanCaes 0:a16f60a71395 467 if (neg) { \
JonathanCaes 0:a16f60a71395 468 int addrlen = (old? CILEN_ADDRS: CILEN_ADDR); \
JonathanCaes 0:a16f60a71395 469 u32_t l; \
JonathanCaes 0:a16f60a71395 470 if ((len -= addrlen) < 0) { \
JonathanCaes 0:a16f60a71395 471 goto bad; \
JonathanCaes 0:a16f60a71395 472 } \
JonathanCaes 0:a16f60a71395 473 GETCHAR(citype, p); \
JonathanCaes 0:a16f60a71395 474 GETCHAR(cilen, p); \
JonathanCaes 0:a16f60a71395 475 if (cilen != addrlen || \
JonathanCaes 0:a16f60a71395 476 citype != opt) { \
JonathanCaes 0:a16f60a71395 477 goto bad; \
JonathanCaes 0:a16f60a71395 478 } \
JonathanCaes 0:a16f60a71395 479 GETLONG(l, p); \
JonathanCaes 0:a16f60a71395 480 cilong = htonl(l); \
JonathanCaes 0:a16f60a71395 481 if (val1 != cilong) { \
JonathanCaes 0:a16f60a71395 482 goto bad; \
JonathanCaes 0:a16f60a71395 483 } \
JonathanCaes 0:a16f60a71395 484 if (old) { \
JonathanCaes 0:a16f60a71395 485 GETLONG(l, p); \
JonathanCaes 0:a16f60a71395 486 cilong = htonl(l); \
JonathanCaes 0:a16f60a71395 487 if (val2 != cilong) { \
JonathanCaes 0:a16f60a71395 488 goto bad; \
JonathanCaes 0:a16f60a71395 489 } \
JonathanCaes 0:a16f60a71395 490 } \
JonathanCaes 0:a16f60a71395 491 }
JonathanCaes 0:a16f60a71395 492
JonathanCaes 0:a16f60a71395 493 #define ACKCIDNS(opt, neg, addr) \
JonathanCaes 0:a16f60a71395 494 if (neg) { \
JonathanCaes 0:a16f60a71395 495 u32_t l; \
JonathanCaes 0:a16f60a71395 496 if ((len -= CILEN_ADDR) < 0) { \
JonathanCaes 0:a16f60a71395 497 goto bad; \
JonathanCaes 0:a16f60a71395 498 } \
JonathanCaes 0:a16f60a71395 499 GETCHAR(citype, p); \
JonathanCaes 0:a16f60a71395 500 GETCHAR(cilen, p); \
JonathanCaes 0:a16f60a71395 501 if (cilen != CILEN_ADDR || \
JonathanCaes 0:a16f60a71395 502 citype != opt) { \
JonathanCaes 0:a16f60a71395 503 goto bad; \
JonathanCaes 0:a16f60a71395 504 } \
JonathanCaes 0:a16f60a71395 505 GETLONG(l, p); \
JonathanCaes 0:a16f60a71395 506 cilong = htonl(l); \
JonathanCaes 0:a16f60a71395 507 if (addr != cilong) { \
JonathanCaes 0:a16f60a71395 508 goto bad; \
JonathanCaes 0:a16f60a71395 509 } \
JonathanCaes 0:a16f60a71395 510 }
JonathanCaes 0:a16f60a71395 511
JonathanCaes 0:a16f60a71395 512 ACKCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), go->neg_addr,
JonathanCaes 0:a16f60a71395 513 go->old_addrs, go->ouraddr, go->hisaddr);
JonathanCaes 0:a16f60a71395 514
JonathanCaes 0:a16f60a71395 515 ACKCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj,
JonathanCaes 0:a16f60a71395 516 go->maxslotindex, go->cflag);
JonathanCaes 0:a16f60a71395 517
JonathanCaes 0:a16f60a71395 518 ACKCIDNS(CI_MS_DNS1, go->req_dns1, go->dnsaddr[0]);
JonathanCaes 0:a16f60a71395 519
JonathanCaes 0:a16f60a71395 520 ACKCIDNS(CI_MS_DNS2, go->req_dns2, go->dnsaddr[1]);
JonathanCaes 0:a16f60a71395 521
JonathanCaes 0:a16f60a71395 522 /*
JonathanCaes 0:a16f60a71395 523 * If there are any remaining CIs, then this packet is bad.
JonathanCaes 0:a16f60a71395 524 */
JonathanCaes 0:a16f60a71395 525 if (len != 0) {
JonathanCaes 0:a16f60a71395 526 goto bad;
JonathanCaes 0:a16f60a71395 527 }
JonathanCaes 0:a16f60a71395 528 return (1);
JonathanCaes 0:a16f60a71395 529
JonathanCaes 0:a16f60a71395 530 bad:
JonathanCaes 0:a16f60a71395 531 IPCPDEBUG(LOG_INFO, ("ipcp_ackci: received bad Ack!\n"));
JonathanCaes 0:a16f60a71395 532 return (0);
JonathanCaes 0:a16f60a71395 533 }
JonathanCaes 0:a16f60a71395 534
JonathanCaes 0:a16f60a71395 535 /*
JonathanCaes 0:a16f60a71395 536 * ipcp_nakci - Peer has sent a NAK for some of our CIs.
JonathanCaes 0:a16f60a71395 537 * This should not modify any state if the Nak is bad
JonathanCaes 0:a16f60a71395 538 * or if IPCP is in the LS_OPENED state.
JonathanCaes 0:a16f60a71395 539 *
JonathanCaes 0:a16f60a71395 540 * Returns:
JonathanCaes 0:a16f60a71395 541 * 0 - Nak was bad.
JonathanCaes 0:a16f60a71395 542 * 1 - Nak was good.
JonathanCaes 0:a16f60a71395 543 */
JonathanCaes 0:a16f60a71395 544 static int
JonathanCaes 0:a16f60a71395 545 ipcp_nakci(fsm *f, u_char *p, int len)
JonathanCaes 0:a16f60a71395 546 {
JonathanCaes 0:a16f60a71395 547 ipcp_options *go = &ipcp_gotoptions[f->unit];
JonathanCaes 0:a16f60a71395 548 u_char cimaxslotindex, cicflag;
JonathanCaes 0:a16f60a71395 549 u_char citype, cilen, *next;
JonathanCaes 0:a16f60a71395 550 u_short cishort;
JonathanCaes 0:a16f60a71395 551 u32_t ciaddr1, ciaddr2, l, cidnsaddr;
JonathanCaes 0:a16f60a71395 552 ipcp_options no; /* options we've seen Naks for */
JonathanCaes 0:a16f60a71395 553 ipcp_options try; /* options to request next time */
JonathanCaes 0:a16f60a71395 554
JonathanCaes 0:a16f60a71395 555 BZERO(&no, sizeof(no));
JonathanCaes 0:a16f60a71395 556 try = *go;
JonathanCaes 0:a16f60a71395 557
JonathanCaes 0:a16f60a71395 558 /*
JonathanCaes 0:a16f60a71395 559 * Any Nak'd CIs must be in exactly the same order that we sent.
JonathanCaes 0:a16f60a71395 560 * Check packet length and CI length at each step.
JonathanCaes 0:a16f60a71395 561 * If we find any deviations, then this packet is bad.
JonathanCaes 0:a16f60a71395 562 */
JonathanCaes 0:a16f60a71395 563 #define NAKCIADDR(opt, neg, old, code) \
JonathanCaes 0:a16f60a71395 564 if (go->neg && \
JonathanCaes 0:a16f60a71395 565 len >= (cilen = (old? CILEN_ADDRS: CILEN_ADDR)) && \
JonathanCaes 0:a16f60a71395 566 p[1] == cilen && \
JonathanCaes 0:a16f60a71395 567 p[0] == opt) { \
JonathanCaes 0:a16f60a71395 568 len -= cilen; \
JonathanCaes 0:a16f60a71395 569 INCPTR(2, p); \
JonathanCaes 0:a16f60a71395 570 GETLONG(l, p); \
JonathanCaes 0:a16f60a71395 571 ciaddr1 = htonl(l); \
JonathanCaes 0:a16f60a71395 572 if (old) { \
JonathanCaes 0:a16f60a71395 573 GETLONG(l, p); \
JonathanCaes 0:a16f60a71395 574 ciaddr2 = htonl(l); \
JonathanCaes 0:a16f60a71395 575 no.old_addrs = 1; \
JonathanCaes 0:a16f60a71395 576 } else { \
JonathanCaes 0:a16f60a71395 577 ciaddr2 = 0; \
JonathanCaes 0:a16f60a71395 578 } \
JonathanCaes 0:a16f60a71395 579 no.neg = 1; \
JonathanCaes 0:a16f60a71395 580 code \
JonathanCaes 0:a16f60a71395 581 }
JonathanCaes 0:a16f60a71395 582
JonathanCaes 0:a16f60a71395 583 #define NAKCIVJ(opt, neg, code) \
JonathanCaes 0:a16f60a71395 584 if (go->neg && \
JonathanCaes 0:a16f60a71395 585 ((cilen = p[1]) == CILEN_COMPRESS || cilen == CILEN_VJ) && \
JonathanCaes 0:a16f60a71395 586 len >= cilen && \
JonathanCaes 0:a16f60a71395 587 p[0] == opt) { \
JonathanCaes 0:a16f60a71395 588 len -= cilen; \
JonathanCaes 0:a16f60a71395 589 INCPTR(2, p); \
JonathanCaes 0:a16f60a71395 590 GETSHORT(cishort, p); \
JonathanCaes 0:a16f60a71395 591 no.neg = 1; \
JonathanCaes 0:a16f60a71395 592 code \
JonathanCaes 0:a16f60a71395 593 }
JonathanCaes 0:a16f60a71395 594
JonathanCaes 0:a16f60a71395 595 #define NAKCIDNS(opt, neg, code) \
JonathanCaes 0:a16f60a71395 596 if (go->neg && \
JonathanCaes 0:a16f60a71395 597 ((cilen = p[1]) == CILEN_ADDR) && \
JonathanCaes 0:a16f60a71395 598 len >= cilen && \
JonathanCaes 0:a16f60a71395 599 p[0] == opt) { \
JonathanCaes 0:a16f60a71395 600 len -= cilen; \
JonathanCaes 0:a16f60a71395 601 INCPTR(2, p); \
JonathanCaes 0:a16f60a71395 602 GETLONG(l, p); \
JonathanCaes 0:a16f60a71395 603 cidnsaddr = htonl(l); \
JonathanCaes 0:a16f60a71395 604 no.neg = 1; \
JonathanCaes 0:a16f60a71395 605 code \
JonathanCaes 0:a16f60a71395 606 }
JonathanCaes 0:a16f60a71395 607
JonathanCaes 0:a16f60a71395 608 /*
JonathanCaes 0:a16f60a71395 609 * Accept the peer's idea of {our,his} address, if different
JonathanCaes 0:a16f60a71395 610 * from our idea, only if the accept_{local,remote} flag is set.
JonathanCaes 0:a16f60a71395 611 */
JonathanCaes 0:a16f60a71395 612 NAKCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), neg_addr, go->old_addrs,
JonathanCaes 0:a16f60a71395 613 if (go->accept_local && ciaddr1) { /* Do we know our address? */
JonathanCaes 0:a16f60a71395 614 try.ouraddr = ciaddr1;
JonathanCaes 0:a16f60a71395 615 IPCPDEBUG(LOG_INFO, ("local IP address %s\n",
JonathanCaes 0:a16f60a71395 616 inet_ntoa(ciaddr1)));
JonathanCaes 0:a16f60a71395 617 }
JonathanCaes 0:a16f60a71395 618 if (go->accept_remote && ciaddr2) { /* Does he know his? */
JonathanCaes 0:a16f60a71395 619 try.hisaddr = ciaddr2;
JonathanCaes 0:a16f60a71395 620 IPCPDEBUG(LOG_INFO, ("remote IP address %s\n",
JonathanCaes 0:a16f60a71395 621 inet_ntoa(ciaddr2)));
JonathanCaes 0:a16f60a71395 622 }
JonathanCaes 0:a16f60a71395 623 );
JonathanCaes 0:a16f60a71395 624
JonathanCaes 0:a16f60a71395 625 /*
JonathanCaes 0:a16f60a71395 626 * Accept the peer's value of maxslotindex provided that it
JonathanCaes 0:a16f60a71395 627 * is less than what we asked for. Turn off slot-ID compression
JonathanCaes 0:a16f60a71395 628 * if the peer wants. Send old-style compress-type option if
JonathanCaes 0:a16f60a71395 629 * the peer wants.
JonathanCaes 0:a16f60a71395 630 */
JonathanCaes 0:a16f60a71395 631 NAKCIVJ(CI_COMPRESSTYPE, neg_vj,
JonathanCaes 0:a16f60a71395 632 if (cilen == CILEN_VJ) {
JonathanCaes 0:a16f60a71395 633 GETCHAR(cimaxslotindex, p);
JonathanCaes 0:a16f60a71395 634 GETCHAR(cicflag, p);
JonathanCaes 0:a16f60a71395 635 if (cishort == IPCP_VJ_COMP) {
JonathanCaes 0:a16f60a71395 636 try.old_vj = 0;
JonathanCaes 0:a16f60a71395 637 if (cimaxslotindex < go->maxslotindex) {
JonathanCaes 0:a16f60a71395 638 try.maxslotindex = cimaxslotindex;
JonathanCaes 0:a16f60a71395 639 }
JonathanCaes 0:a16f60a71395 640 if (!cicflag) {
JonathanCaes 0:a16f60a71395 641 try.cflag = 0;
JonathanCaes 0:a16f60a71395 642 }
JonathanCaes 0:a16f60a71395 643 } else {
JonathanCaes 0:a16f60a71395 644 try.neg_vj = 0;
JonathanCaes 0:a16f60a71395 645 }
JonathanCaes 0:a16f60a71395 646 } else {
JonathanCaes 0:a16f60a71395 647 if (cishort == IPCP_VJ_COMP || cishort == IPCP_VJ_COMP_OLD) {
JonathanCaes 0:a16f60a71395 648 try.old_vj = 1;
JonathanCaes 0:a16f60a71395 649 try.vj_protocol = cishort;
JonathanCaes 0:a16f60a71395 650 } else {
JonathanCaes 0:a16f60a71395 651 try.neg_vj = 0;
JonathanCaes 0:a16f60a71395 652 }
JonathanCaes 0:a16f60a71395 653 }
JonathanCaes 0:a16f60a71395 654 );
JonathanCaes 0:a16f60a71395 655
JonathanCaes 0:a16f60a71395 656 NAKCIDNS(CI_MS_DNS1, req_dns1,
JonathanCaes 0:a16f60a71395 657 try.dnsaddr[0] = cidnsaddr;
JonathanCaes 0:a16f60a71395 658 IPCPDEBUG(LOG_INFO, ("primary DNS address %s\n", inet_ntoa(cidnsaddr)));
JonathanCaes 0:a16f60a71395 659 );
JonathanCaes 0:a16f60a71395 660
JonathanCaes 0:a16f60a71395 661 NAKCIDNS(CI_MS_DNS2, req_dns2,
JonathanCaes 0:a16f60a71395 662 try.dnsaddr[1] = cidnsaddr;
JonathanCaes 0:a16f60a71395 663 IPCPDEBUG(LOG_INFO, ("secondary DNS address %s\n", inet_ntoa(cidnsaddr)));
JonathanCaes 0:a16f60a71395 664 );
JonathanCaes 0:a16f60a71395 665
JonathanCaes 0:a16f60a71395 666 /*
JonathanCaes 0:a16f60a71395 667 * There may be remaining CIs, if the peer is requesting negotiation
JonathanCaes 0:a16f60a71395 668 * on an option that we didn't include in our request packet.
JonathanCaes 0:a16f60a71395 669 * If they want to negotiate about IP addresses, we comply.
JonathanCaes 0:a16f60a71395 670 * If they want us to ask for compression, we refuse.
JonathanCaes 0:a16f60a71395 671 */
JonathanCaes 0:a16f60a71395 672 while (len > CILEN_VOID) {
JonathanCaes 0:a16f60a71395 673 GETCHAR(citype, p);
JonathanCaes 0:a16f60a71395 674 GETCHAR(cilen, p);
JonathanCaes 0:a16f60a71395 675 if( (len -= cilen) < 0 ) {
JonathanCaes 0:a16f60a71395 676 goto bad;
JonathanCaes 0:a16f60a71395 677 }
JonathanCaes 0:a16f60a71395 678 next = p + cilen - 2;
JonathanCaes 0:a16f60a71395 679
JonathanCaes 0:a16f60a71395 680 switch (citype) {
JonathanCaes 0:a16f60a71395 681 case CI_COMPRESSTYPE:
JonathanCaes 0:a16f60a71395 682 if (go->neg_vj || no.neg_vj ||
JonathanCaes 0:a16f60a71395 683 (cilen != CILEN_VJ && cilen != CILEN_COMPRESS)) {
JonathanCaes 0:a16f60a71395 684 goto bad;
JonathanCaes 0:a16f60a71395 685 }
JonathanCaes 0:a16f60a71395 686 no.neg_vj = 1;
JonathanCaes 0:a16f60a71395 687 break;
JonathanCaes 0:a16f60a71395 688 case CI_ADDRS:
JonathanCaes 0:a16f60a71395 689 if ((go->neg_addr && go->old_addrs) || no.old_addrs
JonathanCaes 0:a16f60a71395 690 || cilen != CILEN_ADDRS) {
JonathanCaes 0:a16f60a71395 691 goto bad;
JonathanCaes 0:a16f60a71395 692 }
JonathanCaes 0:a16f60a71395 693 try.neg_addr = 1;
JonathanCaes 0:a16f60a71395 694 try.old_addrs = 1;
JonathanCaes 0:a16f60a71395 695 GETLONG(l, p);
JonathanCaes 0:a16f60a71395 696 ciaddr1 = htonl(l);
JonathanCaes 0:a16f60a71395 697 if (ciaddr1 && go->accept_local) {
JonathanCaes 0:a16f60a71395 698 try.ouraddr = ciaddr1;
JonathanCaes 0:a16f60a71395 699 }
JonathanCaes 0:a16f60a71395 700 GETLONG(l, p);
JonathanCaes 0:a16f60a71395 701 ciaddr2 = htonl(l);
JonathanCaes 0:a16f60a71395 702 if (ciaddr2 && go->accept_remote) {
JonathanCaes 0:a16f60a71395 703 try.hisaddr = ciaddr2;
JonathanCaes 0:a16f60a71395 704 }
JonathanCaes 0:a16f60a71395 705 no.old_addrs = 1;
JonathanCaes 0:a16f60a71395 706 break;
JonathanCaes 0:a16f60a71395 707 case CI_ADDR:
JonathanCaes 0:a16f60a71395 708 if (go->neg_addr || no.neg_addr || cilen != CILEN_ADDR) {
JonathanCaes 0:a16f60a71395 709 goto bad;
JonathanCaes 0:a16f60a71395 710 }
JonathanCaes 0:a16f60a71395 711 try.old_addrs = 0;
JonathanCaes 0:a16f60a71395 712 GETLONG(l, p);
JonathanCaes 0:a16f60a71395 713 ciaddr1 = htonl(l);
JonathanCaes 0:a16f60a71395 714 if (ciaddr1 && go->accept_local) {
JonathanCaes 0:a16f60a71395 715 try.ouraddr = ciaddr1;
JonathanCaes 0:a16f60a71395 716 }
JonathanCaes 0:a16f60a71395 717 if (try.ouraddr != 0) {
JonathanCaes 0:a16f60a71395 718 try.neg_addr = 1;
JonathanCaes 0:a16f60a71395 719 }
JonathanCaes 0:a16f60a71395 720 no.neg_addr = 1;
JonathanCaes 0:a16f60a71395 721 break;
JonathanCaes 0:a16f60a71395 722 }
JonathanCaes 0:a16f60a71395 723 p = next;
JonathanCaes 0:a16f60a71395 724 }
JonathanCaes 0:a16f60a71395 725
JonathanCaes 0:a16f60a71395 726 /* If there is still anything left, this packet is bad. */
JonathanCaes 0:a16f60a71395 727 if (len != 0) {
JonathanCaes 0:a16f60a71395 728 goto bad;
JonathanCaes 0:a16f60a71395 729 }
JonathanCaes 0:a16f60a71395 730
JonathanCaes 0:a16f60a71395 731 /*
JonathanCaes 0:a16f60a71395 732 * OK, the Nak is good. Now we can update state.
JonathanCaes 0:a16f60a71395 733 */
JonathanCaes 0:a16f60a71395 734 if (f->state != LS_OPENED) {
JonathanCaes 0:a16f60a71395 735 *go = try;
JonathanCaes 0:a16f60a71395 736 }
JonathanCaes 0:a16f60a71395 737
JonathanCaes 0:a16f60a71395 738 return 1;
JonathanCaes 0:a16f60a71395 739
JonathanCaes 0:a16f60a71395 740 bad:
JonathanCaes 0:a16f60a71395 741 IPCPDEBUG(LOG_INFO, ("ipcp_nakci: received bad Nak!\n"));
JonathanCaes 0:a16f60a71395 742 return 0;
JonathanCaes 0:a16f60a71395 743 }
JonathanCaes 0:a16f60a71395 744
JonathanCaes 0:a16f60a71395 745
JonathanCaes 0:a16f60a71395 746 /*
JonathanCaes 0:a16f60a71395 747 * ipcp_rejci - Reject some of our CIs.
JonathanCaes 0:a16f60a71395 748 */
JonathanCaes 0:a16f60a71395 749 static int
JonathanCaes 0:a16f60a71395 750 ipcp_rejci(fsm *f, u_char *p, int len)
JonathanCaes 0:a16f60a71395 751 {
JonathanCaes 0:a16f60a71395 752 ipcp_options *go = &ipcp_gotoptions[f->unit];
JonathanCaes 0:a16f60a71395 753 u_char cimaxslotindex, ciflag, cilen;
JonathanCaes 0:a16f60a71395 754 u_short cishort;
JonathanCaes 0:a16f60a71395 755 u32_t cilong;
JonathanCaes 0:a16f60a71395 756 ipcp_options try; /* options to request next time */
JonathanCaes 0:a16f60a71395 757
JonathanCaes 0:a16f60a71395 758 try = *go;
JonathanCaes 0:a16f60a71395 759 /*
JonathanCaes 0:a16f60a71395 760 * Any Rejected CIs must be in exactly the same order that we sent.
JonathanCaes 0:a16f60a71395 761 * Check packet length and CI length at each step.
JonathanCaes 0:a16f60a71395 762 * If we find any deviations, then this packet is bad.
JonathanCaes 0:a16f60a71395 763 */
JonathanCaes 0:a16f60a71395 764 #define REJCIADDR(opt, neg, old, val1, val2) \
JonathanCaes 0:a16f60a71395 765 if (go->neg && \
JonathanCaes 0:a16f60a71395 766 len >= (cilen = old? CILEN_ADDRS: CILEN_ADDR) && \
JonathanCaes 0:a16f60a71395 767 p[1] == cilen && \
JonathanCaes 0:a16f60a71395 768 p[0] == opt) { \
JonathanCaes 0:a16f60a71395 769 u32_t l; \
JonathanCaes 0:a16f60a71395 770 len -= cilen; \
JonathanCaes 0:a16f60a71395 771 INCPTR(2, p); \
JonathanCaes 0:a16f60a71395 772 GETLONG(l, p); \
JonathanCaes 0:a16f60a71395 773 cilong = htonl(l); \
JonathanCaes 0:a16f60a71395 774 /* Check rejected value. */ \
JonathanCaes 0:a16f60a71395 775 if (cilong != val1) { \
JonathanCaes 0:a16f60a71395 776 goto bad; \
JonathanCaes 0:a16f60a71395 777 } \
JonathanCaes 0:a16f60a71395 778 if (old) { \
JonathanCaes 0:a16f60a71395 779 GETLONG(l, p); \
JonathanCaes 0:a16f60a71395 780 cilong = htonl(l); \
JonathanCaes 0:a16f60a71395 781 /* Check rejected value. */ \
JonathanCaes 0:a16f60a71395 782 if (cilong != val2) { \
JonathanCaes 0:a16f60a71395 783 goto bad; \
JonathanCaes 0:a16f60a71395 784 } \
JonathanCaes 0:a16f60a71395 785 } \
JonathanCaes 0:a16f60a71395 786 try.neg = 0; \
JonathanCaes 0:a16f60a71395 787 }
JonathanCaes 0:a16f60a71395 788
JonathanCaes 0:a16f60a71395 789 #define REJCIVJ(opt, neg, val, old, maxslot, cflag) \
JonathanCaes 0:a16f60a71395 790 if (go->neg && \
JonathanCaes 0:a16f60a71395 791 p[1] == (old? CILEN_COMPRESS : CILEN_VJ) && \
JonathanCaes 0:a16f60a71395 792 len >= p[1] && \
JonathanCaes 0:a16f60a71395 793 p[0] == opt) { \
JonathanCaes 0:a16f60a71395 794 len -= p[1]; \
JonathanCaes 0:a16f60a71395 795 INCPTR(2, p); \
JonathanCaes 0:a16f60a71395 796 GETSHORT(cishort, p); \
JonathanCaes 0:a16f60a71395 797 /* Check rejected value. */ \
JonathanCaes 0:a16f60a71395 798 if (cishort != val) { \
JonathanCaes 0:a16f60a71395 799 goto bad; \
JonathanCaes 0:a16f60a71395 800 } \
JonathanCaes 0:a16f60a71395 801 if (!old) { \
JonathanCaes 0:a16f60a71395 802 GETCHAR(cimaxslotindex, p); \
JonathanCaes 0:a16f60a71395 803 if (cimaxslotindex != maxslot) { \
JonathanCaes 0:a16f60a71395 804 goto bad; \
JonathanCaes 0:a16f60a71395 805 } \
JonathanCaes 0:a16f60a71395 806 GETCHAR(ciflag, p); \
JonathanCaes 0:a16f60a71395 807 if (ciflag != cflag) { \
JonathanCaes 0:a16f60a71395 808 goto bad; \
JonathanCaes 0:a16f60a71395 809 } \
JonathanCaes 0:a16f60a71395 810 } \
JonathanCaes 0:a16f60a71395 811 try.neg = 0; \
JonathanCaes 0:a16f60a71395 812 }
JonathanCaes 0:a16f60a71395 813
JonathanCaes 0:a16f60a71395 814 #define REJCIDNS(opt, neg, dnsaddr) \
JonathanCaes 0:a16f60a71395 815 if (go->neg && \
JonathanCaes 0:a16f60a71395 816 ((cilen = p[1]) == CILEN_ADDR) && \
JonathanCaes 0:a16f60a71395 817 len >= cilen && \
JonathanCaes 0:a16f60a71395 818 p[0] == opt) { \
JonathanCaes 0:a16f60a71395 819 u32_t l; \
JonathanCaes 0:a16f60a71395 820 len -= cilen; \
JonathanCaes 0:a16f60a71395 821 INCPTR(2, p); \
JonathanCaes 0:a16f60a71395 822 GETLONG(l, p); \
JonathanCaes 0:a16f60a71395 823 cilong = htonl(l); \
JonathanCaes 0:a16f60a71395 824 /* Check rejected value. */ \
JonathanCaes 0:a16f60a71395 825 if (cilong != dnsaddr) { \
JonathanCaes 0:a16f60a71395 826 goto bad; \
JonathanCaes 0:a16f60a71395 827 } \
JonathanCaes 0:a16f60a71395 828 try.neg = 0; \
JonathanCaes 0:a16f60a71395 829 }
JonathanCaes 0:a16f60a71395 830
JonathanCaes 0:a16f60a71395 831 REJCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), neg_addr,
JonathanCaes 0:a16f60a71395 832 go->old_addrs, go->ouraddr, go->hisaddr);
JonathanCaes 0:a16f60a71395 833
JonathanCaes 0:a16f60a71395 834 REJCIVJ(CI_COMPRESSTYPE, neg_vj, go->vj_protocol, go->old_vj,
JonathanCaes 0:a16f60a71395 835 go->maxslotindex, go->cflag);
JonathanCaes 0:a16f60a71395 836
JonathanCaes 0:a16f60a71395 837 REJCIDNS(CI_MS_DNS1, req_dns1, go->dnsaddr[0]);
JonathanCaes 0:a16f60a71395 838
JonathanCaes 0:a16f60a71395 839 REJCIDNS(CI_MS_DNS2, req_dns2, go->dnsaddr[1]);
JonathanCaes 0:a16f60a71395 840
JonathanCaes 0:a16f60a71395 841 /*
JonathanCaes 0:a16f60a71395 842 * If there are any remaining CIs, then this packet is bad.
JonathanCaes 0:a16f60a71395 843 */
JonathanCaes 0:a16f60a71395 844 if (len != 0) {
JonathanCaes 0:a16f60a71395 845 goto bad;
JonathanCaes 0:a16f60a71395 846 }
JonathanCaes 0:a16f60a71395 847 /*
JonathanCaes 0:a16f60a71395 848 * Now we can update state.
JonathanCaes 0:a16f60a71395 849 */
JonathanCaes 0:a16f60a71395 850 if (f->state != LS_OPENED) {
JonathanCaes 0:a16f60a71395 851 *go = try;
JonathanCaes 0:a16f60a71395 852 }
JonathanCaes 0:a16f60a71395 853 return 1;
JonathanCaes 0:a16f60a71395 854
JonathanCaes 0:a16f60a71395 855 bad:
JonathanCaes 0:a16f60a71395 856 IPCPDEBUG(LOG_INFO, ("ipcp_rejci: received bad Reject!\n"));
JonathanCaes 0:a16f60a71395 857 return 0;
JonathanCaes 0:a16f60a71395 858 }
JonathanCaes 0:a16f60a71395 859
JonathanCaes 0:a16f60a71395 860
JonathanCaes 0:a16f60a71395 861 /*
JonathanCaes 0:a16f60a71395 862 * ipcp_reqci - Check the peer's requested CIs and send appropriate response.
JonathanCaes 0:a16f60a71395 863 *
JonathanCaes 0:a16f60a71395 864 * Returns: CONFACK, CONFNAK or CONFREJ and input packet modified
JonathanCaes 0:a16f60a71395 865 * appropriately. If reject_if_disagree is non-zero, doesn't return
JonathanCaes 0:a16f60a71395 866 * CONFNAK; returns CONFREJ if it can't return CONFACK.
JonathanCaes 0:a16f60a71395 867 */
JonathanCaes 0:a16f60a71395 868 static int
JonathanCaes 0:a16f60a71395 869 ipcp_reqci(fsm *f, u_char *inp/* Requested CIs */,int *len/* Length of requested CIs */,int reject_if_disagree)
JonathanCaes 0:a16f60a71395 870 {
JonathanCaes 0:a16f60a71395 871 ipcp_options *wo = &ipcp_wantoptions[f->unit];
JonathanCaes 0:a16f60a71395 872 ipcp_options *ho = &ipcp_hisoptions[f->unit];
JonathanCaes 0:a16f60a71395 873 ipcp_options *ao = &ipcp_allowoptions[f->unit];
JonathanCaes 0:a16f60a71395 874 #ifdef OLD_CI_ADDRS
JonathanCaes 0:a16f60a71395 875 ipcp_options *go = &ipcp_gotoptions[f->unit];
JonathanCaes 0:a16f60a71395 876 #endif
JonathanCaes 0:a16f60a71395 877 u_char *cip, *next; /* Pointer to current and next CIs */
JonathanCaes 0:a16f60a71395 878 u_short cilen, citype; /* Parsed len, type */
JonathanCaes 0:a16f60a71395 879 u_short cishort; /* Parsed short value */
JonathanCaes 0:a16f60a71395 880 u32_t tl, ciaddr1; /* Parsed address values */
JonathanCaes 0:a16f60a71395 881 #ifdef OLD_CI_ADDRS
JonathanCaes 0:a16f60a71395 882 u32_t ciaddr2; /* Parsed address values */
JonathanCaes 0:a16f60a71395 883 #endif
JonathanCaes 0:a16f60a71395 884 int rc = CONFACK; /* Final packet return code */
JonathanCaes 0:a16f60a71395 885 int orc; /* Individual option return code */
JonathanCaes 0:a16f60a71395 886 u_char *p; /* Pointer to next char to parse */
JonathanCaes 0:a16f60a71395 887 u_char *ucp = inp; /* Pointer to current output char */
JonathanCaes 0:a16f60a71395 888 int l = *len; /* Length left */
JonathanCaes 0:a16f60a71395 889 u_char maxslotindex, cflag;
JonathanCaes 0:a16f60a71395 890 int d;
JonathanCaes 0:a16f60a71395 891
JonathanCaes 0:a16f60a71395 892 cis_received[f->unit] = 1;
JonathanCaes 0:a16f60a71395 893
JonathanCaes 0:a16f60a71395 894 /*
JonathanCaes 0:a16f60a71395 895 * Reset all his options.
JonathanCaes 0:a16f60a71395 896 */
JonathanCaes 0:a16f60a71395 897 BZERO(ho, sizeof(*ho));
JonathanCaes 0:a16f60a71395 898
JonathanCaes 0:a16f60a71395 899 /*
JonathanCaes 0:a16f60a71395 900 * Process all his options.
JonathanCaes 0:a16f60a71395 901 */
JonathanCaes 0:a16f60a71395 902 next = inp;
JonathanCaes 0:a16f60a71395 903 while (l) {
JonathanCaes 0:a16f60a71395 904 orc = CONFACK; /* Assume success */
JonathanCaes 0:a16f60a71395 905 cip = p = next; /* Remember begining of CI */
JonathanCaes 0:a16f60a71395 906 if (l < 2 || /* Not enough data for CI header or */
JonathanCaes 0:a16f60a71395 907 p[1] < 2 || /* CI length too small or */
JonathanCaes 0:a16f60a71395 908 p[1] > l) { /* CI length too big? */
JonathanCaes 0:a16f60a71395 909 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: bad CI length!\n"));
JonathanCaes 0:a16f60a71395 910 orc = CONFREJ; /* Reject bad CI */
JonathanCaes 0:a16f60a71395 911 cilen = (u_short)l;/* Reject till end of packet */
JonathanCaes 0:a16f60a71395 912 l = 0; /* Don't loop again */
JonathanCaes 0:a16f60a71395 913 goto endswitch;
JonathanCaes 0:a16f60a71395 914 }
JonathanCaes 0:a16f60a71395 915 GETCHAR(citype, p); /* Parse CI type */
JonathanCaes 0:a16f60a71395 916 GETCHAR(cilen, p); /* Parse CI length */
JonathanCaes 0:a16f60a71395 917 l -= cilen; /* Adjust remaining length */
JonathanCaes 0:a16f60a71395 918 next += cilen; /* Step to next CI */
JonathanCaes 0:a16f60a71395 919
JonathanCaes 0:a16f60a71395 920 switch (citype) { /* Check CI type */
JonathanCaes 0:a16f60a71395 921 #ifdef OLD_CI_ADDRS /* Need to save space... */
JonathanCaes 0:a16f60a71395 922 case CI_ADDRS:
JonathanCaes 0:a16f60a71395 923 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received ADDRS\n"));
JonathanCaes 0:a16f60a71395 924 if (!ao->neg_addr ||
JonathanCaes 0:a16f60a71395 925 cilen != CILEN_ADDRS) { /* Check CI length */
JonathanCaes 0:a16f60a71395 926 orc = CONFREJ; /* Reject CI */
JonathanCaes 0:a16f60a71395 927 break;
JonathanCaes 0:a16f60a71395 928 }
JonathanCaes 0:a16f60a71395 929
JonathanCaes 0:a16f60a71395 930 /*
JonathanCaes 0:a16f60a71395 931 * If he has no address, or if we both have his address but
JonathanCaes 0:a16f60a71395 932 * disagree about it, then NAK it with our idea.
JonathanCaes 0:a16f60a71395 933 * In particular, if we don't know his address, but he does,
JonathanCaes 0:a16f60a71395 934 * then accept it.
JonathanCaes 0:a16f60a71395 935 */
JonathanCaes 0:a16f60a71395 936 GETLONG(tl, p); /* Parse source address (his) */
JonathanCaes 0:a16f60a71395 937 ciaddr1 = htonl(tl);
JonathanCaes 0:a16f60a71395 938 IPCPDEBUG(LOG_INFO, ("his addr %s\n", inet_ntoa(ciaddr1)));
JonathanCaes 0:a16f60a71395 939 if (ciaddr1 != wo->hisaddr
JonathanCaes 0:a16f60a71395 940 && (ciaddr1 == 0 || !wo->accept_remote)) {
JonathanCaes 0:a16f60a71395 941 orc = CONFNAK;
JonathanCaes 0:a16f60a71395 942 if (!reject_if_disagree) {
JonathanCaes 0:a16f60a71395 943 DECPTR(sizeof(u32_t), p);
JonathanCaes 0:a16f60a71395 944 tl = ntohl(wo->hisaddr);
JonathanCaes 0:a16f60a71395 945 PUTLONG(tl, p);
JonathanCaes 0:a16f60a71395 946 }
JonathanCaes 0:a16f60a71395 947 } else if (ciaddr1 == 0 && wo->hisaddr == 0) {
JonathanCaes 0:a16f60a71395 948 /*
JonathanCaes 0:a16f60a71395 949 * If neither we nor he knows his address, reject the option.
JonathanCaes 0:a16f60a71395 950 */
JonathanCaes 0:a16f60a71395 951 orc = CONFREJ;
JonathanCaes 0:a16f60a71395 952 wo->req_addr = 0; /* don't NAK with 0.0.0.0 later */
JonathanCaes 0:a16f60a71395 953 break;
JonathanCaes 0:a16f60a71395 954 }
JonathanCaes 0:a16f60a71395 955
JonathanCaes 0:a16f60a71395 956 /*
JonathanCaes 0:a16f60a71395 957 * If he doesn't know our address, or if we both have our address
JonathanCaes 0:a16f60a71395 958 * but disagree about it, then NAK it with our idea.
JonathanCaes 0:a16f60a71395 959 */
JonathanCaes 0:a16f60a71395 960 GETLONG(tl, p); /* Parse desination address (ours) */
JonathanCaes 0:a16f60a71395 961 ciaddr2 = htonl(tl);
JonathanCaes 0:a16f60a71395 962 IPCPDEBUG(LOG_INFO, ("our addr %s\n", inet_ntoa(ciaddr2)));
JonathanCaes 0:a16f60a71395 963 if (ciaddr2 != wo->ouraddr) {
JonathanCaes 0:a16f60a71395 964 if (ciaddr2 == 0 || !wo->accept_local) {
JonathanCaes 0:a16f60a71395 965 orc = CONFNAK;
JonathanCaes 0:a16f60a71395 966 if (!reject_if_disagree) {
JonathanCaes 0:a16f60a71395 967 DECPTR(sizeof(u32_t), p);
JonathanCaes 0:a16f60a71395 968 tl = ntohl(wo->ouraddr);
JonathanCaes 0:a16f60a71395 969 PUTLONG(tl, p);
JonathanCaes 0:a16f60a71395 970 }
JonathanCaes 0:a16f60a71395 971 } else {
JonathanCaes 0:a16f60a71395 972 go->ouraddr = ciaddr2; /* accept peer's idea */
JonathanCaes 0:a16f60a71395 973 }
JonathanCaes 0:a16f60a71395 974 }
JonathanCaes 0:a16f60a71395 975
JonathanCaes 0:a16f60a71395 976 ho->neg_addr = 1;
JonathanCaes 0:a16f60a71395 977 ho->old_addrs = 1;
JonathanCaes 0:a16f60a71395 978 ho->hisaddr = ciaddr1;
JonathanCaes 0:a16f60a71395 979 ho->ouraddr = ciaddr2;
JonathanCaes 0:a16f60a71395 980 break;
JonathanCaes 0:a16f60a71395 981 #endif
JonathanCaes 0:a16f60a71395 982
JonathanCaes 0:a16f60a71395 983 case CI_ADDR:
JonathanCaes 0:a16f60a71395 984 if (!ao->neg_addr) {
JonathanCaes 0:a16f60a71395 985 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR not allowed\n"));
JonathanCaes 0:a16f60a71395 986 orc = CONFREJ; /* Reject CI */
JonathanCaes 0:a16f60a71395 987 break;
JonathanCaes 0:a16f60a71395 988 } else if (cilen != CILEN_ADDR) { /* Check CI length */
JonathanCaes 0:a16f60a71395 989 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR bad len\n"));
JonathanCaes 0:a16f60a71395 990 orc = CONFREJ; /* Reject CI */
JonathanCaes 0:a16f60a71395 991 break;
JonathanCaes 0:a16f60a71395 992 }
JonathanCaes 0:a16f60a71395 993
JonathanCaes 0:a16f60a71395 994 /*
JonathanCaes 0:a16f60a71395 995 * If he has no address, or if we both have his address but
JonathanCaes 0:a16f60a71395 996 * disagree about it, then NAK it with our idea.
JonathanCaes 0:a16f60a71395 997 * In particular, if we don't know his address, but he does,
JonathanCaes 0:a16f60a71395 998 * then accept it.
JonathanCaes 0:a16f60a71395 999 */
JonathanCaes 0:a16f60a71395 1000 GETLONG(tl, p); /* Parse source address (his) */
JonathanCaes 0:a16f60a71395 1001 ciaddr1 = htonl(tl);
JonathanCaes 0:a16f60a71395 1002 if (ciaddr1 != wo->hisaddr
JonathanCaes 0:a16f60a71395 1003 && (ciaddr1 == 0 || !wo->accept_remote)) {
JonathanCaes 0:a16f60a71395 1004 orc = CONFNAK;
JonathanCaes 0:a16f60a71395 1005 if (!reject_if_disagree) {
JonathanCaes 0:a16f60a71395 1006 DECPTR(sizeof(u32_t), p);
JonathanCaes 0:a16f60a71395 1007 tl = ntohl(wo->hisaddr);
JonathanCaes 0:a16f60a71395 1008 PUTLONG(tl, p);
JonathanCaes 0:a16f60a71395 1009 }
JonathanCaes 0:a16f60a71395 1010 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Nak ADDR %s\n", inet_ntoa(ciaddr1)));
JonathanCaes 0:a16f60a71395 1011 } else if (ciaddr1 == 0 && wo->hisaddr == 0) {
JonathanCaes 0:a16f60a71395 1012 /*
JonathanCaes 0:a16f60a71395 1013 * Don't ACK an address of 0.0.0.0 - reject it instead.
JonathanCaes 0:a16f60a71395 1014 */
JonathanCaes 0:a16f60a71395 1015 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR %s\n", inet_ntoa(ciaddr1)));
JonathanCaes 0:a16f60a71395 1016 orc = CONFREJ;
JonathanCaes 0:a16f60a71395 1017 wo->req_addr = 0; /* don't NAK with 0.0.0.0 later */
JonathanCaes 0:a16f60a71395 1018 break;
JonathanCaes 0:a16f60a71395 1019 }
JonathanCaes 0:a16f60a71395 1020
JonathanCaes 0:a16f60a71395 1021 ho->neg_addr = 1;
JonathanCaes 0:a16f60a71395 1022 ho->hisaddr = ciaddr1;
JonathanCaes 0:a16f60a71395 1023 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: ADDR %s\n", inet_ntoa(ciaddr1)));
JonathanCaes 0:a16f60a71395 1024 break;
JonathanCaes 0:a16f60a71395 1025
JonathanCaes 0:a16f60a71395 1026 case CI_MS_DNS1:
JonathanCaes 0:a16f60a71395 1027 case CI_MS_DNS2:
JonathanCaes 0:a16f60a71395 1028 /* Microsoft primary or secondary DNS request */
JonathanCaes 0:a16f60a71395 1029 d = citype == CI_MS_DNS2;
JonathanCaes 0:a16f60a71395 1030
JonathanCaes 0:a16f60a71395 1031 /* If we do not have a DNS address then we cannot send it */
JonathanCaes 0:a16f60a71395 1032 if (ao->dnsaddr[d] == 0 ||
JonathanCaes 0:a16f60a71395 1033 cilen != CILEN_ADDR) { /* Check CI length */
JonathanCaes 0:a16f60a71395 1034 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting DNS%d Request\n", d+1));
JonathanCaes 0:a16f60a71395 1035 orc = CONFREJ; /* Reject CI */
JonathanCaes 0:a16f60a71395 1036 break;
JonathanCaes 0:a16f60a71395 1037 }
JonathanCaes 0:a16f60a71395 1038 GETLONG(tl, p);
JonathanCaes 0:a16f60a71395 1039 if (htonl(tl) != ao->dnsaddr[d]) {
JonathanCaes 0:a16f60a71395 1040 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking DNS%d Request %s\n",
JonathanCaes 0:a16f60a71395 1041 d+1, inet_ntoa(tl)));
JonathanCaes 0:a16f60a71395 1042 DECPTR(sizeof(u32_t), p);
JonathanCaes 0:a16f60a71395 1043 tl = ntohl(ao->dnsaddr[d]);
JonathanCaes 0:a16f60a71395 1044 PUTLONG(tl, p);
JonathanCaes 0:a16f60a71395 1045 orc = CONFNAK;
JonathanCaes 0:a16f60a71395 1046 }
JonathanCaes 0:a16f60a71395 1047 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received DNS%d Request\n", d+1));
JonathanCaes 0:a16f60a71395 1048 break;
JonathanCaes 0:a16f60a71395 1049
JonathanCaes 0:a16f60a71395 1050 case CI_MS_WINS1:
JonathanCaes 0:a16f60a71395 1051 case CI_MS_WINS2:
JonathanCaes 0:a16f60a71395 1052 /* Microsoft primary or secondary WINS request */
JonathanCaes 0:a16f60a71395 1053 d = citype == CI_MS_WINS2;
JonathanCaes 0:a16f60a71395 1054 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received WINS%d Request\n", d+1));
JonathanCaes 0:a16f60a71395 1055
JonathanCaes 0:a16f60a71395 1056 /* If we do not have a DNS address then we cannot send it */
JonathanCaes 0:a16f60a71395 1057 if (ao->winsaddr[d] == 0 ||
JonathanCaes 0:a16f60a71395 1058 cilen != CILEN_ADDR) { /* Check CI length */
JonathanCaes 0:a16f60a71395 1059 orc = CONFREJ; /* Reject CI */
JonathanCaes 0:a16f60a71395 1060 break;
JonathanCaes 0:a16f60a71395 1061 }
JonathanCaes 0:a16f60a71395 1062 GETLONG(tl, p);
JonathanCaes 0:a16f60a71395 1063 if (htonl(tl) != ao->winsaddr[d]) {
JonathanCaes 0:a16f60a71395 1064 DECPTR(sizeof(u32_t), p);
JonathanCaes 0:a16f60a71395 1065 tl = ntohl(ao->winsaddr[d]);
JonathanCaes 0:a16f60a71395 1066 PUTLONG(tl, p);
JonathanCaes 0:a16f60a71395 1067 orc = CONFNAK;
JonathanCaes 0:a16f60a71395 1068 }
JonathanCaes 0:a16f60a71395 1069 break;
JonathanCaes 0:a16f60a71395 1070
JonathanCaes 0:a16f60a71395 1071 case CI_COMPRESSTYPE:
JonathanCaes 0:a16f60a71395 1072 if (!ao->neg_vj) {
JonathanCaes 0:a16f60a71395 1073 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE not allowed\n"));
JonathanCaes 0:a16f60a71395 1074 orc = CONFREJ;
JonathanCaes 0:a16f60a71395 1075 break;
JonathanCaes 0:a16f60a71395 1076 } else if (cilen != CILEN_VJ && cilen != CILEN_COMPRESS) {
JonathanCaes 0:a16f60a71395 1077 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE len=%d\n", cilen));
JonathanCaes 0:a16f60a71395 1078 orc = CONFREJ;
JonathanCaes 0:a16f60a71395 1079 break;
JonathanCaes 0:a16f60a71395 1080 }
JonathanCaes 0:a16f60a71395 1081 GETSHORT(cishort, p);
JonathanCaes 0:a16f60a71395 1082
JonathanCaes 0:a16f60a71395 1083 if (!(cishort == IPCP_VJ_COMP ||
JonathanCaes 0:a16f60a71395 1084 (cishort == IPCP_VJ_COMP_OLD && cilen == CILEN_COMPRESS))) {
JonathanCaes 0:a16f60a71395 1085 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE %d\n", cishort));
JonathanCaes 0:a16f60a71395 1086 orc = CONFREJ;
JonathanCaes 0:a16f60a71395 1087 break;
JonathanCaes 0:a16f60a71395 1088 }
JonathanCaes 0:a16f60a71395 1089
JonathanCaes 0:a16f60a71395 1090 ho->neg_vj = 1;
JonathanCaes 0:a16f60a71395 1091 ho->vj_protocol = cishort;
JonathanCaes 0:a16f60a71395 1092 if (cilen == CILEN_VJ) {
JonathanCaes 0:a16f60a71395 1093 GETCHAR(maxslotindex, p);
JonathanCaes 0:a16f60a71395 1094 if (maxslotindex > ao->maxslotindex) {
JonathanCaes 0:a16f60a71395 1095 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking VJ max slot %d\n", maxslotindex));
JonathanCaes 0:a16f60a71395 1096 orc = CONFNAK;
JonathanCaes 0:a16f60a71395 1097 if (!reject_if_disagree) {
JonathanCaes 0:a16f60a71395 1098 DECPTR(1, p);
JonathanCaes 0:a16f60a71395 1099 PUTCHAR(ao->maxslotindex, p);
JonathanCaes 0:a16f60a71395 1100 }
JonathanCaes 0:a16f60a71395 1101 }
JonathanCaes 0:a16f60a71395 1102 GETCHAR(cflag, p);
JonathanCaes 0:a16f60a71395 1103 if (cflag && !ao->cflag) {
JonathanCaes 0:a16f60a71395 1104 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking VJ cflag %d\n", cflag));
JonathanCaes 0:a16f60a71395 1105 orc = CONFNAK;
JonathanCaes 0:a16f60a71395 1106 if (!reject_if_disagree) {
JonathanCaes 0:a16f60a71395 1107 DECPTR(1, p);
JonathanCaes 0:a16f60a71395 1108 PUTCHAR(wo->cflag, p);
JonathanCaes 0:a16f60a71395 1109 }
JonathanCaes 0:a16f60a71395 1110 }
JonathanCaes 0:a16f60a71395 1111 ho->maxslotindex = maxslotindex;
JonathanCaes 0:a16f60a71395 1112 ho->cflag = cflag;
JonathanCaes 0:a16f60a71395 1113 } else {
JonathanCaes 0:a16f60a71395 1114 ho->old_vj = 1;
JonathanCaes 0:a16f60a71395 1115 ho->maxslotindex = MAX_SLOTS - 1;
JonathanCaes 0:a16f60a71395 1116 ho->cflag = 1;
JonathanCaes 0:a16f60a71395 1117 }
JonathanCaes 0:a16f60a71395 1118 IPCPDEBUG(LOG_INFO, (
JonathanCaes 0:a16f60a71395 1119 "ipcp_reqci: received COMPRESSTYPE p=%d old=%d maxslot=%d cflag=%d\n",
JonathanCaes 0:a16f60a71395 1120 ho->vj_protocol, ho->old_vj, ho->maxslotindex, ho->cflag));
JonathanCaes 0:a16f60a71395 1121 break;
JonathanCaes 0:a16f60a71395 1122
JonathanCaes 0:a16f60a71395 1123 default:
JonathanCaes 0:a16f60a71395 1124 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting unknown CI type %d\n", citype));
JonathanCaes 0:a16f60a71395 1125 orc = CONFREJ;
JonathanCaes 0:a16f60a71395 1126 break;
JonathanCaes 0:a16f60a71395 1127 }
JonathanCaes 0:a16f60a71395 1128
JonathanCaes 0:a16f60a71395 1129 endswitch:
JonathanCaes 0:a16f60a71395 1130 if (orc == CONFACK && /* Good CI */
JonathanCaes 0:a16f60a71395 1131 rc != CONFACK) { /* but prior CI wasnt? */
JonathanCaes 0:a16f60a71395 1132 continue; /* Don't send this one */
JonathanCaes 0:a16f60a71395 1133 }
JonathanCaes 0:a16f60a71395 1134
JonathanCaes 0:a16f60a71395 1135 if (orc == CONFNAK) { /* Nak this CI? */
JonathanCaes 0:a16f60a71395 1136 if (reject_if_disagree) { /* Getting fed up with sending NAKs? */
JonathanCaes 0:a16f60a71395 1137 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting too many naks\n"));
JonathanCaes 0:a16f60a71395 1138 orc = CONFREJ; /* Get tough if so */
JonathanCaes 0:a16f60a71395 1139 } else {
JonathanCaes 0:a16f60a71395 1140 if (rc == CONFREJ) { /* Rejecting prior CI? */
JonathanCaes 0:a16f60a71395 1141 continue; /* Don't send this one */
JonathanCaes 0:a16f60a71395 1142 }
JonathanCaes 0:a16f60a71395 1143 if (rc == CONFACK) { /* Ack'd all prior CIs? */
JonathanCaes 0:a16f60a71395 1144 rc = CONFNAK; /* Not anymore... */
JonathanCaes 0:a16f60a71395 1145 ucp = inp; /* Backup */
JonathanCaes 0:a16f60a71395 1146 }
JonathanCaes 0:a16f60a71395 1147 }
JonathanCaes 0:a16f60a71395 1148 }
JonathanCaes 0:a16f60a71395 1149
JonathanCaes 0:a16f60a71395 1150 if (orc == CONFREJ && /* Reject this CI */
JonathanCaes 0:a16f60a71395 1151 rc != CONFREJ) { /* but no prior ones? */
JonathanCaes 0:a16f60a71395 1152 rc = CONFREJ;
JonathanCaes 0:a16f60a71395 1153 ucp = inp; /* Backup */
JonathanCaes 0:a16f60a71395 1154 }
JonathanCaes 0:a16f60a71395 1155
JonathanCaes 0:a16f60a71395 1156 /* Need to move CI? */
JonathanCaes 0:a16f60a71395 1157 if (ucp != cip) {
JonathanCaes 0:a16f60a71395 1158 BCOPY(cip, ucp, cilen); /* Move it */
JonathanCaes 0:a16f60a71395 1159 }
JonathanCaes 0:a16f60a71395 1160
JonathanCaes 0:a16f60a71395 1161 /* Update output pointer */
JonathanCaes 0:a16f60a71395 1162 INCPTR(cilen, ucp);
JonathanCaes 0:a16f60a71395 1163 }
JonathanCaes 0:a16f60a71395 1164
JonathanCaes 0:a16f60a71395 1165 /*
JonathanCaes 0:a16f60a71395 1166 * If we aren't rejecting this packet, and we want to negotiate
JonathanCaes 0:a16f60a71395 1167 * their address, and they didn't send their address, then we
JonathanCaes 0:a16f60a71395 1168 * send a NAK with a CI_ADDR option appended. We assume the
JonathanCaes 0:a16f60a71395 1169 * input buffer is long enough that we can append the extra
JonathanCaes 0:a16f60a71395 1170 * option safely.
JonathanCaes 0:a16f60a71395 1171 */
JonathanCaes 0:a16f60a71395 1172 if (rc != CONFREJ && !ho->neg_addr &&
JonathanCaes 0:a16f60a71395 1173 wo->req_addr && !reject_if_disagree) {
JonathanCaes 0:a16f60a71395 1174 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Requesting peer address\n"));
JonathanCaes 0:a16f60a71395 1175 if (rc == CONFACK) {
JonathanCaes 0:a16f60a71395 1176 rc = CONFNAK;
JonathanCaes 0:a16f60a71395 1177 ucp = inp; /* reset pointer */
JonathanCaes 0:a16f60a71395 1178 wo->req_addr = 0; /* don't ask again */
JonathanCaes 0:a16f60a71395 1179 }
JonathanCaes 0:a16f60a71395 1180 PUTCHAR(CI_ADDR, ucp);
JonathanCaes 0:a16f60a71395 1181 PUTCHAR(CILEN_ADDR, ucp);
JonathanCaes 0:a16f60a71395 1182 tl = ntohl(wo->hisaddr);
JonathanCaes 0:a16f60a71395 1183 PUTLONG(tl, ucp);
JonathanCaes 0:a16f60a71395 1184 }
JonathanCaes 0:a16f60a71395 1185
JonathanCaes 0:a16f60a71395 1186 *len = (int)(ucp - inp); /* Compute output length */
JonathanCaes 0:a16f60a71395 1187 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: returning Configure-%s\n", CODENAME(rc)));
JonathanCaes 0:a16f60a71395 1188 return (rc); /* Return final code */
JonathanCaes 0:a16f60a71395 1189 }
JonathanCaes 0:a16f60a71395 1190
JonathanCaes 0:a16f60a71395 1191
JonathanCaes 0:a16f60a71395 1192 #if 0
JonathanCaes 0:a16f60a71395 1193 /*
JonathanCaes 0:a16f60a71395 1194 * ip_check_options - check that any IP-related options are OK,
JonathanCaes 0:a16f60a71395 1195 * and assign appropriate defaults.
JonathanCaes 0:a16f60a71395 1196 */
JonathanCaes 0:a16f60a71395 1197 static void
JonathanCaes 0:a16f60a71395 1198 ip_check_options(u_long localAddr)
JonathanCaes 0:a16f60a71395 1199 {
JonathanCaes 0:a16f60a71395 1200 ipcp_options *wo = &ipcp_wantoptions[0];
JonathanCaes 0:a16f60a71395 1201
JonathanCaes 0:a16f60a71395 1202 /*
JonathanCaes 0:a16f60a71395 1203 * Load our default IP address but allow the remote host to give us
JonathanCaes 0:a16f60a71395 1204 * a new address.
JonathanCaes 0:a16f60a71395 1205 */
JonathanCaes 0:a16f60a71395 1206 if (wo->ouraddr == 0 && !ppp_settings.disable_defaultip) {
JonathanCaes 0:a16f60a71395 1207 wo->accept_local = 1; /* don't insist on this default value */
JonathanCaes 0:a16f60a71395 1208 wo->ouraddr = htonl(localAddr);
JonathanCaes 0:a16f60a71395 1209 }
JonathanCaes 0:a16f60a71395 1210 }
JonathanCaes 0:a16f60a71395 1211 #endif
JonathanCaes 0:a16f60a71395 1212
JonathanCaes 0:a16f60a71395 1213
JonathanCaes 0:a16f60a71395 1214 /*
JonathanCaes 0:a16f60a71395 1215 * ipcp_up - IPCP has come UP.
JonathanCaes 0:a16f60a71395 1216 *
JonathanCaes 0:a16f60a71395 1217 * Configure the IP network interface appropriately and bring it up.
JonathanCaes 0:a16f60a71395 1218 */
JonathanCaes 0:a16f60a71395 1219 static void
JonathanCaes 0:a16f60a71395 1220 ipcp_up(fsm *f)
JonathanCaes 0:a16f60a71395 1221 {
JonathanCaes 0:a16f60a71395 1222 u32_t mask;
JonathanCaes 0:a16f60a71395 1223 ipcp_options *ho = &ipcp_hisoptions[f->unit];
JonathanCaes 0:a16f60a71395 1224 ipcp_options *go = &ipcp_gotoptions[f->unit];
JonathanCaes 0:a16f60a71395 1225 ipcp_options *wo = &ipcp_wantoptions[f->unit];
JonathanCaes 0:a16f60a71395 1226
JonathanCaes 0:a16f60a71395 1227 np_up(f->unit, PPP_IP);
JonathanCaes 0:a16f60a71395 1228 IPCPDEBUG(LOG_INFO, ("ipcp: up\n"));
JonathanCaes 0:a16f60a71395 1229
JonathanCaes 0:a16f60a71395 1230 /*
JonathanCaes 0:a16f60a71395 1231 * We must have a non-zero IP address for both ends of the link.
JonathanCaes 0:a16f60a71395 1232 */
JonathanCaes 0:a16f60a71395 1233 if (!ho->neg_addr) {
JonathanCaes 0:a16f60a71395 1234 ho->hisaddr = wo->hisaddr;
JonathanCaes 0:a16f60a71395 1235 }
JonathanCaes 0:a16f60a71395 1236 #ifdef __PPP_STRICT_IMPL__ //DG : Kludge for bad 3g providers PPP impl
JonathanCaes 0:a16f60a71395 1237 if (ho->hisaddr == 0) {
JonathanCaes 0:a16f60a71395 1238 IPCPDEBUG(LOG_ERR, ("Could not determine remote IP address\n"));
JonathanCaes 0:a16f60a71395 1239 ipcp_close(f->unit, "Could not determine remote IP address");
JonathanCaes 0:a16f60a71395 1240 return;
JonathanCaes 0:a16f60a71395 1241 }
JonathanCaes 0:a16f60a71395 1242 #endif
JonathanCaes 0:a16f60a71395 1243 if (go->ouraddr == 0) {
JonathanCaes 0:a16f60a71395 1244 IPCPDEBUG(LOG_ERR, ("Could not determine local IP address\n"));
JonathanCaes 0:a16f60a71395 1245 ipcp_close(f->unit, "Could not determine local IP address");
JonathanCaes 0:a16f60a71395 1246 return;
JonathanCaes 0:a16f60a71395 1247 }
JonathanCaes 0:a16f60a71395 1248
JonathanCaes 0:a16f60a71395 1249 if (ppp_settings.usepeerdns && (go->dnsaddr[0] || go->dnsaddr[1])) {
JonathanCaes 0:a16f60a71395 1250 /*pppGotDNSAddrs(go->dnsaddr[0], go->dnsaddr[1]);*/
JonathanCaes 0:a16f60a71395 1251 }
JonathanCaes 0:a16f60a71395 1252
JonathanCaes 0:a16f60a71395 1253 /*
JonathanCaes 0:a16f60a71395 1254 * Check that the peer is allowed to use the IP address it wants.
JonathanCaes 0:a16f60a71395 1255 */
JonathanCaes 0:a16f60a71395 1256 if (!auth_ip_addr(f->unit, ho->hisaddr)) {
JonathanCaes 0:a16f60a71395 1257 IPCPDEBUG(LOG_ERR, ("Peer is not authorized to use remote address %s\n",
JonathanCaes 0:a16f60a71395 1258 inet_ntoa(ho->hisaddr)));
JonathanCaes 0:a16f60a71395 1259 ipcp_close(f->unit, "Unauthorized remote IP address");
JonathanCaes 0:a16f60a71395 1260 return;
JonathanCaes 0:a16f60a71395 1261 }
JonathanCaes 0:a16f60a71395 1262
JonathanCaes 0:a16f60a71395 1263 /* set tcp compression */
JonathanCaes 0:a16f60a71395 1264 sifvjcomp(f->unit, ho->neg_vj, ho->cflag, ho->maxslotindex);
JonathanCaes 0:a16f60a71395 1265
JonathanCaes 0:a16f60a71395 1266 /*
JonathanCaes 0:a16f60a71395 1267 * Set IP addresses and (if specified) netmask.
JonathanCaes 0:a16f60a71395 1268 */
JonathanCaes 0:a16f60a71395 1269 mask = GetMask(go->ouraddr);
JonathanCaes 0:a16f60a71395 1270
JonathanCaes 0:a16f60a71395 1271 if (!sifaddr(f->unit, go->ouraddr, ho->hisaddr, mask, go->dnsaddr[0], go->dnsaddr[1])) {
JonathanCaes 0:a16f60a71395 1272 IPCPDEBUG(LOG_WARNING, ("sifaddr failed\n"));
JonathanCaes 0:a16f60a71395 1273 ipcp_close(f->unit, "Interface configuration failed");
JonathanCaes 0:a16f60a71395 1274 return;
JonathanCaes 0:a16f60a71395 1275 }
JonathanCaes 0:a16f60a71395 1276
JonathanCaes 0:a16f60a71395 1277 /* bring the interface up for IP */
JonathanCaes 0:a16f60a71395 1278 if (!sifup(f->unit)) {
JonathanCaes 0:a16f60a71395 1279 IPCPDEBUG(LOG_WARNING, ("sifup failed\n"));
JonathanCaes 0:a16f60a71395 1280 ipcp_close(f->unit, "Interface configuration failed");
JonathanCaes 0:a16f60a71395 1281 return;
JonathanCaes 0:a16f60a71395 1282 }
JonathanCaes 0:a16f60a71395 1283
JonathanCaes 0:a16f60a71395 1284 sifnpmode(f->unit, PPP_IP, NPMODE_PASS);
JonathanCaes 0:a16f60a71395 1285
JonathanCaes 0:a16f60a71395 1286 /* assign a default route through the interface if required */
JonathanCaes 0:a16f60a71395 1287 if (ipcp_wantoptions[f->unit].default_route) {
JonathanCaes 0:a16f60a71395 1288 if (sifdefaultroute(f->unit, go->ouraddr, ho->hisaddr)) {
JonathanCaes 0:a16f60a71395 1289 default_route_set[f->unit] = 1;
JonathanCaes 0:a16f60a71395 1290 }
JonathanCaes 0:a16f60a71395 1291 }
JonathanCaes 0:a16f60a71395 1292
JonathanCaes 0:a16f60a71395 1293 IPCPDEBUG(LOG_NOTICE, ("local IP address %s\n", inet_ntoa(go->ouraddr)));
JonathanCaes 0:a16f60a71395 1294 IPCPDEBUG(LOG_NOTICE, ("remote IP address %s\n", inet_ntoa(ho->hisaddr)));
JonathanCaes 0:a16f60a71395 1295 if (go->dnsaddr[0]) {
JonathanCaes 0:a16f60a71395 1296 IPCPDEBUG(LOG_NOTICE, ("primary DNS address %s\n", inet_ntoa(go->dnsaddr[0])));
JonathanCaes 0:a16f60a71395 1297 }
JonathanCaes 0:a16f60a71395 1298 if (go->dnsaddr[1]) {
JonathanCaes 0:a16f60a71395 1299 IPCPDEBUG(LOG_NOTICE, ("secondary DNS address %s\n", inet_ntoa(go->dnsaddr[1])));
JonathanCaes 0:a16f60a71395 1300 }
JonathanCaes 0:a16f60a71395 1301 }
JonathanCaes 0:a16f60a71395 1302
JonathanCaes 0:a16f60a71395 1303
JonathanCaes 0:a16f60a71395 1304 /*
JonathanCaes 0:a16f60a71395 1305 * ipcp_down - IPCP has gone DOWN.
JonathanCaes 0:a16f60a71395 1306 *
JonathanCaes 0:a16f60a71395 1307 * Take the IP network interface down, clear its addresses
JonathanCaes 0:a16f60a71395 1308 * and delete routes through it.
JonathanCaes 0:a16f60a71395 1309 */
JonathanCaes 0:a16f60a71395 1310 static void
JonathanCaes 0:a16f60a71395 1311 ipcp_down(fsm *f)
JonathanCaes 0:a16f60a71395 1312 {
JonathanCaes 0:a16f60a71395 1313 IPCPDEBUG(LOG_INFO, ("ipcp: down\n"));
JonathanCaes 0:a16f60a71395 1314 np_down(f->unit, PPP_IP);
JonathanCaes 0:a16f60a71395 1315 sifvjcomp(f->unit, 0, 0, 0);
JonathanCaes 0:a16f60a71395 1316
JonathanCaes 0:a16f60a71395 1317 sifdown(f->unit);
JonathanCaes 0:a16f60a71395 1318 ipcp_clear_addrs(f->unit);
JonathanCaes 0:a16f60a71395 1319 }
JonathanCaes 0:a16f60a71395 1320
JonathanCaes 0:a16f60a71395 1321
JonathanCaes 0:a16f60a71395 1322 /*
JonathanCaes 0:a16f60a71395 1323 * ipcp_clear_addrs() - clear the interface addresses, routes, etc.
JonathanCaes 0:a16f60a71395 1324 */
JonathanCaes 0:a16f60a71395 1325 static void
JonathanCaes 0:a16f60a71395 1326 ipcp_clear_addrs(int unit)
JonathanCaes 0:a16f60a71395 1327 {
JonathanCaes 0:a16f60a71395 1328 u32_t ouraddr, hisaddr;
JonathanCaes 0:a16f60a71395 1329
JonathanCaes 0:a16f60a71395 1330 ouraddr = ipcp_gotoptions[unit].ouraddr;
JonathanCaes 0:a16f60a71395 1331 hisaddr = ipcp_hisoptions[unit].hisaddr;
JonathanCaes 0:a16f60a71395 1332 if (default_route_set[unit]) {
JonathanCaes 0:a16f60a71395 1333 cifdefaultroute(unit, ouraddr, hisaddr);
JonathanCaes 0:a16f60a71395 1334 default_route_set[unit] = 0;
JonathanCaes 0:a16f60a71395 1335 }
JonathanCaes 0:a16f60a71395 1336 cifaddr(unit, ouraddr, hisaddr);
JonathanCaes 0:a16f60a71395 1337 }
JonathanCaes 0:a16f60a71395 1338
JonathanCaes 0:a16f60a71395 1339
JonathanCaes 0:a16f60a71395 1340 /*
JonathanCaes 0:a16f60a71395 1341 * ipcp_finished - possibly shut down the lower layers.
JonathanCaes 0:a16f60a71395 1342 */
JonathanCaes 0:a16f60a71395 1343 static void
JonathanCaes 0:a16f60a71395 1344 ipcp_finished(fsm *f)
JonathanCaes 0:a16f60a71395 1345 {
JonathanCaes 0:a16f60a71395 1346 np_finished(f->unit, PPP_IP);
JonathanCaes 0:a16f60a71395 1347 }
JonathanCaes 0:a16f60a71395 1348
JonathanCaes 0:a16f60a71395 1349 #if PPP_ADDITIONAL_CALLBACKS
JonathanCaes 0:a16f60a71395 1350 static int
JonathanCaes 0:a16f60a71395 1351 ipcp_printpkt(u_char *p, int plen, void (*printer) (void *, char *, ...), void *arg)
JonathanCaes 0:a16f60a71395 1352 {
JonathanCaes 0:a16f60a71395 1353 LWIP_UNUSED_ARG(p);
JonathanCaes 0:a16f60a71395 1354 LWIP_UNUSED_ARG(plen);
JonathanCaes 0:a16f60a71395 1355 LWIP_UNUSED_ARG(printer);
JonathanCaes 0:a16f60a71395 1356 LWIP_UNUSED_ARG(arg);
JonathanCaes 0:a16f60a71395 1357 return 0;
JonathanCaes 0:a16f60a71395 1358 }
JonathanCaes 0:a16f60a71395 1359
JonathanCaes 0:a16f60a71395 1360 /*
JonathanCaes 0:a16f60a71395 1361 * ip_active_pkt - see if this IP packet is worth bringing the link up for.
JonathanCaes 0:a16f60a71395 1362 * We don't bring the link up for IP fragments or for TCP FIN packets
JonathanCaes 0:a16f60a71395 1363 * with no data.
JonathanCaes 0:a16f60a71395 1364 */
JonathanCaes 0:a16f60a71395 1365 #define IP_HDRLEN 20 /* bytes */
JonathanCaes 0:a16f60a71395 1366 #define IP_OFFMASK 0x1fff
JonathanCaes 0:a16f60a71395 1367 #define IPPROTO_TCP 6
JonathanCaes 0:a16f60a71395 1368 #define TCP_HDRLEN 20
JonathanCaes 0:a16f60a71395 1369 #define TH_FIN 0x01
JonathanCaes 0:a16f60a71395 1370
JonathanCaes 0:a16f60a71395 1371 /*
JonathanCaes 0:a16f60a71395 1372 * We use these macros because the IP header may be at an odd address,
JonathanCaes 0:a16f60a71395 1373 * and some compilers might use word loads to get th_off or ip_hl.
JonathanCaes 0:a16f60a71395 1374 */
JonathanCaes 0:a16f60a71395 1375
JonathanCaes 0:a16f60a71395 1376 #define net_short(x) (((x)[0] << 8) + (x)[1])
JonathanCaes 0:a16f60a71395 1377 #define get_iphl(x) (((unsigned char *)(x))[0] & 0xF)
JonathanCaes 0:a16f60a71395 1378 #define get_ipoff(x) net_short((unsigned char *)(x) + 6)
JonathanCaes 0:a16f60a71395 1379 #define get_ipproto(x) (((unsigned char *)(x))[9])
JonathanCaes 0:a16f60a71395 1380 #define get_tcpoff(x) (((unsigned char *)(x))[12] >> 4)
JonathanCaes 0:a16f60a71395 1381 #define get_tcpflags(x) (((unsigned char *)(x))[13])
JonathanCaes 0:a16f60a71395 1382
JonathanCaes 0:a16f60a71395 1383 static int
JonathanCaes 0:a16f60a71395 1384 ip_active_pkt(u_char *pkt, int len)
JonathanCaes 0:a16f60a71395 1385 {
JonathanCaes 0:a16f60a71395 1386 u_char *tcp;
JonathanCaes 0:a16f60a71395 1387 int hlen;
JonathanCaes 0:a16f60a71395 1388
JonathanCaes 0:a16f60a71395 1389 len -= PPP_HDRLEN;
JonathanCaes 0:a16f60a71395 1390 pkt += PPP_HDRLEN;
JonathanCaes 0:a16f60a71395 1391 if (len < IP_HDRLEN) {
JonathanCaes 0:a16f60a71395 1392 return 0;
JonathanCaes 0:a16f60a71395 1393 }
JonathanCaes 0:a16f60a71395 1394 if ((get_ipoff(pkt) & IP_OFFMASK) != 0) {
JonathanCaes 0:a16f60a71395 1395 return 0;
JonathanCaes 0:a16f60a71395 1396 }
JonathanCaes 0:a16f60a71395 1397 if (get_ipproto(pkt) != IPPROTO_TCP) {
JonathanCaes 0:a16f60a71395 1398 return 1;
JonathanCaes 0:a16f60a71395 1399 }
JonathanCaes 0:a16f60a71395 1400 hlen = get_iphl(pkt) * 4;
JonathanCaes 0:a16f60a71395 1401 if (len < hlen + TCP_HDRLEN) {
JonathanCaes 0:a16f60a71395 1402 return 0;
JonathanCaes 0:a16f60a71395 1403 }
JonathanCaes 0:a16f60a71395 1404 tcp = pkt + hlen;
JonathanCaes 0:a16f60a71395 1405 if ((get_tcpflags(tcp) & TH_FIN) != 0 && len == hlen + get_tcpoff(tcp) * 4) {
JonathanCaes 0:a16f60a71395 1406 return 0;
JonathanCaes 0:a16f60a71395 1407 }
JonathanCaes 0:a16f60a71395 1408 return 1;
JonathanCaes 0:a16f60a71395 1409 }
JonathanCaes 0:a16f60a71395 1410 #endif /* PPP_ADDITIONAL_CALLBACKS */
JonathanCaes 0:a16f60a71395 1411
JonathanCaes 0:a16f60a71395 1412 #endif /* PPP_SUPPORT */