CK Sin / Mbed 2 deprecated Ethernetwebsocket

Ethernetwebsoc

Dependencies:   C12832_lcd LM75B WebSocketClient mbed-rtos mbed Socket lwip-eth lwip-sys lwip

EthernetInterface/lwip/netif/ppp/ipcp.c@0:0ed2a7c7190c, 2013-05-31 (annotated)

Committer:
GordonSin
Date:
Fri May 31 04:09:54 2013 +0000
Revision:
0:0ed2a7c7190c
31/5/2013;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
GordonSin 0:0ed2a7c7190c 1 /** In contrast to pppd 2.3.1, DNS support has been added, proxy-ARP and
GordonSin 0:0ed2a7c7190c 2 dial-on-demand has been stripped. */
GordonSin 0:0ed2a7c7190c 3 /*****************************************************************************
GordonSin 0:0ed2a7c7190c 4 * ipcp.c - Network PPP IP Control Protocol program file.
GordonSin 0:0ed2a7c7190c 5 *
GordonSin 0:0ed2a7c7190c 6 * Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
GordonSin 0:0ed2a7c7190c 7 * portions Copyright (c) 1997 by Global Election Systems Inc.
GordonSin 0:0ed2a7c7190c 8 *
GordonSin 0:0ed2a7c7190c 9 * The authors hereby grant permission to use, copy, modify, distribute,
GordonSin 0:0ed2a7c7190c 10 * and license this software and its documentation for any purpose, provided
GordonSin 0:0ed2a7c7190c 11 * that existing copyright notices are retained in all copies and that this
GordonSin 0:0ed2a7c7190c 12 * notice and the following disclaimer are included verbatim in any
GordonSin 0:0ed2a7c7190c 13 * distributions. No written agreement, license, or royalty fee is required
GordonSin 0:0ed2a7c7190c 14 * for any of the authorized uses.
GordonSin 0:0ed2a7c7190c 15 *
GordonSin 0:0ed2a7c7190c 16 * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
GordonSin 0:0ed2a7c7190c 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
GordonSin 0:0ed2a7c7190c 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
GordonSin 0:0ed2a7c7190c 19 * IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
GordonSin 0:0ed2a7c7190c 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
GordonSin 0:0ed2a7c7190c 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
GordonSin 0:0ed2a7c7190c 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
GordonSin 0:0ed2a7c7190c 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
GordonSin 0:0ed2a7c7190c 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
GordonSin 0:0ed2a7c7190c 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
GordonSin 0:0ed2a7c7190c 26 *
GordonSin 0:0ed2a7c7190c 27 ******************************************************************************
GordonSin 0:0ed2a7c7190c 28 * REVISION HISTORY
GordonSin 0:0ed2a7c7190c 29 *
GordonSin 0:0ed2a7c7190c 30 * 03-01-01 Marc Boucher <marc@mbsi.ca>
GordonSin 0:0ed2a7c7190c 31 * Ported to lwIP.
GordonSin 0:0ed2a7c7190c 32 * 97-12-08 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
GordonSin 0:0ed2a7c7190c 33 * Original.
GordonSin 0:0ed2a7c7190c 34 *****************************************************************************/
GordonSin 0:0ed2a7c7190c 35 /*
GordonSin 0:0ed2a7c7190c 36 * ipcp.c - PPP IP Control Protocol.
GordonSin 0:0ed2a7c7190c 37 *
GordonSin 0:0ed2a7c7190c 38 * Copyright (c) 1989 Carnegie Mellon University.
GordonSin 0:0ed2a7c7190c 39 * All rights reserved.
GordonSin 0:0ed2a7c7190c 40 *
GordonSin 0:0ed2a7c7190c 41 * Redistribution and use in source and binary forms are permitted
GordonSin 0:0ed2a7c7190c 42 * provided that the above copyright notice and this paragraph are
GordonSin 0:0ed2a7c7190c 43 * duplicated in all such forms and that any documentation,
GordonSin 0:0ed2a7c7190c 44 * advertising materials, and other materials related to such
GordonSin 0:0ed2a7c7190c 45 * distribution and use acknowledge that the software was developed
GordonSin 0:0ed2a7c7190c 46 * by Carnegie Mellon University. The name of the
GordonSin 0:0ed2a7c7190c 47 * University may not be used to endorse or promote products derived
GordonSin 0:0ed2a7c7190c 48 * from this software without specific prior written permission.
GordonSin 0:0ed2a7c7190c 49 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
GordonSin 0:0ed2a7c7190c 50 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
GordonSin 0:0ed2a7c7190c 51 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
GordonSin 0:0ed2a7c7190c 52 */
GordonSin 0:0ed2a7c7190c 53
GordonSin 0:0ed2a7c7190c 54 #include "lwip/opt.h"
GordonSin 0:0ed2a7c7190c 55
GordonSin 0:0ed2a7c7190c 56 #if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
GordonSin 0:0ed2a7c7190c 57
GordonSin 0:0ed2a7c7190c 58 #include "ppp.h"
GordonSin 0:0ed2a7c7190c 59 #include "pppdebug.h"
GordonSin 0:0ed2a7c7190c 60
GordonSin 0:0ed2a7c7190c 61 #include "auth.h"
GordonSin 0:0ed2a7c7190c 62 #include "fsm.h"
GordonSin 0:0ed2a7c7190c 63 #include "vj.h"
GordonSin 0:0ed2a7c7190c 64 #include "ipcp.h"
GordonSin 0:0ed2a7c7190c 65
GordonSin 0:0ed2a7c7190c 66 #include "lwip/inet.h"
GordonSin 0:0ed2a7c7190c 67
GordonSin 0:0ed2a7c7190c 68 #include <string.h>
GordonSin 0:0ed2a7c7190c 69
GordonSin 0:0ed2a7c7190c 70 /* #define OLD_CI_ADDRS 1 */ /* Support deprecated address negotiation. */
GordonSin 0:0ed2a7c7190c 71
GordonSin 0:0ed2a7c7190c 72 /* global vars */
GordonSin 0:0ed2a7c7190c 73 ipcp_options ipcp_wantoptions[NUM_PPP]; /* Options that we want to request */
GordonSin 0:0ed2a7c7190c 74 ipcp_options ipcp_gotoptions[NUM_PPP]; /* Options that peer ack'd */
GordonSin 0:0ed2a7c7190c 75 ipcp_options ipcp_allowoptions[NUM_PPP]; /* Options we allow peer to request */
GordonSin 0:0ed2a7c7190c 76 ipcp_options ipcp_hisoptions[NUM_PPP]; /* Options that we ack'd */
GordonSin 0:0ed2a7c7190c 77
GordonSin 0:0ed2a7c7190c 78 /* local vars */
GordonSin 0:0ed2a7c7190c 79 static int default_route_set[NUM_PPP]; /* Have set up a default route */
GordonSin 0:0ed2a7c7190c 80 static int cis_received[NUM_PPP]; /* # Conf-Reqs received */
GordonSin 0:0ed2a7c7190c 81
GordonSin 0:0ed2a7c7190c 82
GordonSin 0:0ed2a7c7190c 83 /*
GordonSin 0:0ed2a7c7190c 84 * Callbacks for fsm code. (CI = Configuration Information)
GordonSin 0:0ed2a7c7190c 85 */
GordonSin 0:0ed2a7c7190c 86 static void ipcp_resetci (fsm *); /* Reset our CI */
GordonSin 0:0ed2a7c7190c 87 static int ipcp_cilen (fsm *); /* Return length of our CI */
GordonSin 0:0ed2a7c7190c 88 static void ipcp_addci (fsm *, u_char *, int *); /* Add our CI */
GordonSin 0:0ed2a7c7190c 89 static int ipcp_ackci (fsm *, u_char *, int); /* Peer ack'd our CI */
GordonSin 0:0ed2a7c7190c 90 static int ipcp_nakci (fsm *, u_char *, int); /* Peer nak'd our CI */
GordonSin 0:0ed2a7c7190c 91 static int ipcp_rejci (fsm *, u_char *, int); /* Peer rej'd our CI */
GordonSin 0:0ed2a7c7190c 92 static int ipcp_reqci (fsm *, u_char *, int *, int); /* Rcv CI */
GordonSin 0:0ed2a7c7190c 93 static void ipcp_up (fsm *); /* We're UP */
GordonSin 0:0ed2a7c7190c 94 static void ipcp_down (fsm *); /* We're DOWN */
GordonSin 0:0ed2a7c7190c 95 #if PPP_ADDITIONAL_CALLBACKS
GordonSin 0:0ed2a7c7190c 96 static void ipcp_script (fsm *, char *); /* Run an up/down script */
GordonSin 0:0ed2a7c7190c 97 #endif
GordonSin 0:0ed2a7c7190c 98 static void ipcp_finished (fsm *); /* Don't need lower layer */
GordonSin 0:0ed2a7c7190c 99
GordonSin 0:0ed2a7c7190c 100
GordonSin 0:0ed2a7c7190c 101 fsm ipcp_fsm[NUM_PPP]; /* IPCP fsm structure */
GordonSin 0:0ed2a7c7190c 102
GordonSin 0:0ed2a7c7190c 103
GordonSin 0:0ed2a7c7190c 104 static fsm_callbacks ipcp_callbacks = { /* IPCP callback routines */
GordonSin 0:0ed2a7c7190c 105 ipcp_resetci, /* Reset our Configuration Information */
GordonSin 0:0ed2a7c7190c 106 ipcp_cilen, /* Length of our Configuration Information */
GordonSin 0:0ed2a7c7190c 107 ipcp_addci, /* Add our Configuration Information */
GordonSin 0:0ed2a7c7190c 108 ipcp_ackci, /* ACK our Configuration Information */
GordonSin 0:0ed2a7c7190c 109 ipcp_nakci, /* NAK our Configuration Information */
GordonSin 0:0ed2a7c7190c 110 ipcp_rejci, /* Reject our Configuration Information */
GordonSin 0:0ed2a7c7190c 111 ipcp_reqci, /* Request peer's Configuration Information */
GordonSin 0:0ed2a7c7190c 112 ipcp_up, /* Called when fsm reaches LS_OPENED state */
GordonSin 0:0ed2a7c7190c 113 ipcp_down, /* Called when fsm leaves LS_OPENED state */
GordonSin 0:0ed2a7c7190c 114 NULL, /* Called when we want the lower layer up */
GordonSin 0:0ed2a7c7190c 115 ipcp_finished, /* Called when we want the lower layer down */
GordonSin 0:0ed2a7c7190c 116 NULL, /* Called when Protocol-Reject received */
GordonSin 0:0ed2a7c7190c 117 NULL, /* Retransmission is necessary */
GordonSin 0:0ed2a7c7190c 118 NULL, /* Called to handle protocol-specific codes */
GordonSin 0:0ed2a7c7190c 119 "IPCP" /* String name of protocol */
GordonSin 0:0ed2a7c7190c 120 };
GordonSin 0:0ed2a7c7190c 121
GordonSin 0:0ed2a7c7190c 122 /*
GordonSin 0:0ed2a7c7190c 123 * Protocol entry points from main code.
GordonSin 0:0ed2a7c7190c 124 */
GordonSin 0:0ed2a7c7190c 125 static void ipcp_init (int);
GordonSin 0:0ed2a7c7190c 126 static void ipcp_open (int);
GordonSin 0:0ed2a7c7190c 127 static void ipcp_close (int, char *);
GordonSin 0:0ed2a7c7190c 128 static void ipcp_lowerup (int);
GordonSin 0:0ed2a7c7190c 129 static void ipcp_lowerdown (int);
GordonSin 0:0ed2a7c7190c 130 static void ipcp_input (int, u_char *, int);
GordonSin 0:0ed2a7c7190c 131 static void ipcp_protrej (int);
GordonSin 0:0ed2a7c7190c 132
GordonSin 0:0ed2a7c7190c 133
GordonSin 0:0ed2a7c7190c 134 struct protent ipcp_protent = {
GordonSin 0:0ed2a7c7190c 135 PPP_IPCP,
GordonSin 0:0ed2a7c7190c 136 ipcp_init,
GordonSin 0:0ed2a7c7190c 137 ipcp_input,
GordonSin 0:0ed2a7c7190c 138 ipcp_protrej,
GordonSin 0:0ed2a7c7190c 139 ipcp_lowerup,
GordonSin 0:0ed2a7c7190c 140 ipcp_lowerdown,
GordonSin 0:0ed2a7c7190c 141 ipcp_open,
GordonSin 0:0ed2a7c7190c 142 ipcp_close,
GordonSin 0:0ed2a7c7190c 143 #if PPP_ADDITIONAL_CALLBACKS
GordonSin 0:0ed2a7c7190c 144 ipcp_printpkt,
GordonSin 0:0ed2a7c7190c 145 NULL,
GordonSin 0:0ed2a7c7190c 146 #endif /* PPP_ADDITIONAL_CALLBACKS */
GordonSin 0:0ed2a7c7190c 147 1,
GordonSin 0:0ed2a7c7190c 148 "IPCP",
GordonSin 0:0ed2a7c7190c 149 #if PPP_ADDITIONAL_CALLBACKS
GordonSin 0:0ed2a7c7190c 150 ip_check_options,
GordonSin 0:0ed2a7c7190c 151 NULL,
GordonSin 0:0ed2a7c7190c 152 ip_active_pkt
GordonSin 0:0ed2a7c7190c 153 #endif /* PPP_ADDITIONAL_CALLBACKS */
GordonSin 0:0ed2a7c7190c 154 };
GordonSin 0:0ed2a7c7190c 155
GordonSin 0:0ed2a7c7190c 156 static void ipcp_clear_addrs (int);
GordonSin 0:0ed2a7c7190c 157
GordonSin 0:0ed2a7c7190c 158 /*
GordonSin 0:0ed2a7c7190c 159 * Lengths of configuration options.
GordonSin 0:0ed2a7c7190c 160 */
GordonSin 0:0ed2a7c7190c 161 #define CILEN_VOID 2
GordonSin 0:0ed2a7c7190c 162 #define CILEN_COMPRESS 4 /* min length for compression protocol opt. */
GordonSin 0:0ed2a7c7190c 163 #define CILEN_VJ 6 /* length for RFC1332 Van-Jacobson opt. */
GordonSin 0:0ed2a7c7190c 164 #define CILEN_ADDR 6 /* new-style single address option */
GordonSin 0:0ed2a7c7190c 165 #define CILEN_ADDRS 10 /* old-style dual address option */
GordonSin 0:0ed2a7c7190c 166
GordonSin 0:0ed2a7c7190c 167
GordonSin 0:0ed2a7c7190c 168 #define CODENAME(x) ((x) == CONFACK ? "ACK" : \
GordonSin 0:0ed2a7c7190c 169 (x) == CONFNAK ? "NAK" : "REJ")
GordonSin 0:0ed2a7c7190c 170
GordonSin 0:0ed2a7c7190c 171
GordonSin 0:0ed2a7c7190c 172 /*
GordonSin 0:0ed2a7c7190c 173 * ipcp_init - Initialize IPCP.
GordonSin 0:0ed2a7c7190c 174 */
GordonSin 0:0ed2a7c7190c 175 static void
GordonSin 0:0ed2a7c7190c 176 ipcp_init(int unit)
GordonSin 0:0ed2a7c7190c 177 {
GordonSin 0:0ed2a7c7190c 178 fsm *f = &ipcp_fsm[unit];
GordonSin 0:0ed2a7c7190c 179 ipcp_options *wo = &ipcp_wantoptions[unit];
GordonSin 0:0ed2a7c7190c 180 ipcp_options *ao = &ipcp_allowoptions[unit];
GordonSin 0:0ed2a7c7190c 181
GordonSin 0:0ed2a7c7190c 182 f->unit = unit;
GordonSin 0:0ed2a7c7190c 183 f->protocol = PPP_IPCP;
GordonSin 0:0ed2a7c7190c 184 f->callbacks = &ipcp_callbacks;
GordonSin 0:0ed2a7c7190c 185 fsm_init(&ipcp_fsm[unit]);
GordonSin 0:0ed2a7c7190c 186
GordonSin 0:0ed2a7c7190c 187 memset(wo, 0, sizeof(*wo));
GordonSin 0:0ed2a7c7190c 188 memset(ao, 0, sizeof(*ao));
GordonSin 0:0ed2a7c7190c 189
GordonSin 0:0ed2a7c7190c 190 wo->neg_addr = 1;
GordonSin 0:0ed2a7c7190c 191 wo->ouraddr = 0;
GordonSin 0:0ed2a7c7190c 192 #if VJ_SUPPORT
GordonSin 0:0ed2a7c7190c 193 wo->neg_vj = 1;
GordonSin 0:0ed2a7c7190c 194 #else /* VJ_SUPPORT */
GordonSin 0:0ed2a7c7190c 195 wo->neg_vj = 0;
GordonSin 0:0ed2a7c7190c 196 #endif /* VJ_SUPPORT */
GordonSin 0:0ed2a7c7190c 197 wo->vj_protocol = IPCP_VJ_COMP;
GordonSin 0:0ed2a7c7190c 198 wo->maxslotindex = MAX_SLOTS - 1;
GordonSin 0:0ed2a7c7190c 199 wo->cflag = 0;
GordonSin 0:0ed2a7c7190c 200 wo->default_route = 1;
GordonSin 0:0ed2a7c7190c 201
GordonSin 0:0ed2a7c7190c 202 ao->neg_addr = 1;
GordonSin 0:0ed2a7c7190c 203 #if VJ_SUPPORT
GordonSin 0:0ed2a7c7190c 204 ao->neg_vj = 1;
GordonSin 0:0ed2a7c7190c 205 #else /* VJ_SUPPORT */
GordonSin 0:0ed2a7c7190c 206 ao->neg_vj = 0;
GordonSin 0:0ed2a7c7190c 207 #endif /* VJ_SUPPORT */
GordonSin 0:0ed2a7c7190c 208 ao->maxslotindex = MAX_SLOTS - 1;
GordonSin 0:0ed2a7c7190c 209 ao->cflag = 1;
GordonSin 0:0ed2a7c7190c 210 ao->default_route = 1;
GordonSin 0:0ed2a7c7190c 211 }
GordonSin 0:0ed2a7c7190c 212
GordonSin 0:0ed2a7c7190c 213
GordonSin 0:0ed2a7c7190c 214 /*
GordonSin 0:0ed2a7c7190c 215 * ipcp_open - IPCP is allowed to come up.
GordonSin 0:0ed2a7c7190c 216 */
GordonSin 0:0ed2a7c7190c 217 static void
GordonSin 0:0ed2a7c7190c 218 ipcp_open(int unit)
GordonSin 0:0ed2a7c7190c 219 {
GordonSin 0:0ed2a7c7190c 220 fsm_open(&ipcp_fsm[unit]);
GordonSin 0:0ed2a7c7190c 221 }
GordonSin 0:0ed2a7c7190c 222
GordonSin 0:0ed2a7c7190c 223
GordonSin 0:0ed2a7c7190c 224 /*
GordonSin 0:0ed2a7c7190c 225 * ipcp_close - Take IPCP down.
GordonSin 0:0ed2a7c7190c 226 */
GordonSin 0:0ed2a7c7190c 227 static void
GordonSin 0:0ed2a7c7190c 228 ipcp_close(int unit, char *reason)
GordonSin 0:0ed2a7c7190c 229 {
GordonSin 0:0ed2a7c7190c 230 fsm_close(&ipcp_fsm[unit], reason);
GordonSin 0:0ed2a7c7190c 231 }
GordonSin 0:0ed2a7c7190c 232
GordonSin 0:0ed2a7c7190c 233
GordonSin 0:0ed2a7c7190c 234 /*
GordonSin 0:0ed2a7c7190c 235 * ipcp_lowerup - The lower layer is up.
GordonSin 0:0ed2a7c7190c 236 */
GordonSin 0:0ed2a7c7190c 237 static void
GordonSin 0:0ed2a7c7190c 238 ipcp_lowerup(int unit)
GordonSin 0:0ed2a7c7190c 239 {
GordonSin 0:0ed2a7c7190c 240 fsm_lowerup(&ipcp_fsm[unit]);
GordonSin 0:0ed2a7c7190c 241 }
GordonSin 0:0ed2a7c7190c 242
GordonSin 0:0ed2a7c7190c 243
GordonSin 0:0ed2a7c7190c 244 /*
GordonSin 0:0ed2a7c7190c 245 * ipcp_lowerdown - The lower layer is down.
GordonSin 0:0ed2a7c7190c 246 */
GordonSin 0:0ed2a7c7190c 247 static void
GordonSin 0:0ed2a7c7190c 248 ipcp_lowerdown(int unit)
GordonSin 0:0ed2a7c7190c 249 {
GordonSin 0:0ed2a7c7190c 250 fsm_lowerdown(&ipcp_fsm[unit]);
GordonSin 0:0ed2a7c7190c 251 }
GordonSin 0:0ed2a7c7190c 252
GordonSin 0:0ed2a7c7190c 253
GordonSin 0:0ed2a7c7190c 254 /*
GordonSin 0:0ed2a7c7190c 255 * ipcp_input - Input IPCP packet.
GordonSin 0:0ed2a7c7190c 256 */
GordonSin 0:0ed2a7c7190c 257 static void
GordonSin 0:0ed2a7c7190c 258 ipcp_input(int unit, u_char *p, int len)
GordonSin 0:0ed2a7c7190c 259 {
GordonSin 0:0ed2a7c7190c 260 fsm_input(&ipcp_fsm[unit], p, len);
GordonSin 0:0ed2a7c7190c 261 }
GordonSin 0:0ed2a7c7190c 262
GordonSin 0:0ed2a7c7190c 263
GordonSin 0:0ed2a7c7190c 264 /*
GordonSin 0:0ed2a7c7190c 265 * ipcp_protrej - A Protocol-Reject was received for IPCP.
GordonSin 0:0ed2a7c7190c 266 *
GordonSin 0:0ed2a7c7190c 267 * Pretend the lower layer went down, so we shut up.
GordonSin 0:0ed2a7c7190c 268 */
GordonSin 0:0ed2a7c7190c 269 static void
GordonSin 0:0ed2a7c7190c 270 ipcp_protrej(int unit)
GordonSin 0:0ed2a7c7190c 271 {
GordonSin 0:0ed2a7c7190c 272 fsm_lowerdown(&ipcp_fsm[unit]);
GordonSin 0:0ed2a7c7190c 273 }
GordonSin 0:0ed2a7c7190c 274
GordonSin 0:0ed2a7c7190c 275
GordonSin 0:0ed2a7c7190c 276 /*
GordonSin 0:0ed2a7c7190c 277 * ipcp_resetci - Reset our CI.
GordonSin 0:0ed2a7c7190c 278 */
GordonSin 0:0ed2a7c7190c 279 static void
GordonSin 0:0ed2a7c7190c 280 ipcp_resetci(fsm *f)
GordonSin 0:0ed2a7c7190c 281 {
GordonSin 0:0ed2a7c7190c 282 ipcp_options *wo = &ipcp_wantoptions[f->unit];
GordonSin 0:0ed2a7c7190c 283
GordonSin 0:0ed2a7c7190c 284 wo->req_addr = wo->neg_addr && ipcp_allowoptions[f->unit].neg_addr;
GordonSin 0:0ed2a7c7190c 285 if (wo->ouraddr == 0) {
GordonSin 0:0ed2a7c7190c 286 wo->accept_local = 1;
GordonSin 0:0ed2a7c7190c 287 }
GordonSin 0:0ed2a7c7190c 288 if (wo->hisaddr == 0) {
GordonSin 0:0ed2a7c7190c 289 wo->accept_remote = 1;
GordonSin 0:0ed2a7c7190c 290 }
GordonSin 0:0ed2a7c7190c 291 /* Request DNS addresses from the peer */
GordonSin 0:0ed2a7c7190c 292 wo->req_dns1 = ppp_settings.usepeerdns;
GordonSin 0:0ed2a7c7190c 293 wo->req_dns2 = ppp_settings.usepeerdns;
GordonSin 0:0ed2a7c7190c 294 ipcp_gotoptions[f->unit] = *wo;
GordonSin 0:0ed2a7c7190c 295 cis_received[f->unit] = 0;
GordonSin 0:0ed2a7c7190c 296 }
GordonSin 0:0ed2a7c7190c 297
GordonSin 0:0ed2a7c7190c 298
GordonSin 0:0ed2a7c7190c 299 /*
GordonSin 0:0ed2a7c7190c 300 * ipcp_cilen - Return length of our CI.
GordonSin 0:0ed2a7c7190c 301 */
GordonSin 0:0ed2a7c7190c 302 static int
GordonSin 0:0ed2a7c7190c 303 ipcp_cilen(fsm *f)
GordonSin 0:0ed2a7c7190c 304 {
GordonSin 0:0ed2a7c7190c 305 ipcp_options *go = &ipcp_gotoptions[f->unit];
GordonSin 0:0ed2a7c7190c 306 ipcp_options *wo = &ipcp_wantoptions[f->unit];
GordonSin 0:0ed2a7c7190c 307 ipcp_options *ho = &ipcp_hisoptions[f->unit];
GordonSin 0:0ed2a7c7190c 308
GordonSin 0:0ed2a7c7190c 309 #define LENCIVJ(neg, old) (neg ? (old? CILEN_COMPRESS : CILEN_VJ) : 0)
GordonSin 0:0ed2a7c7190c 310 #define LENCIADDR(neg, old) (neg ? (old? CILEN_ADDRS : CILEN_ADDR) : 0)
GordonSin 0:0ed2a7c7190c 311 #define LENCIDNS(neg) (neg ? (CILEN_ADDR) : 0)
GordonSin 0:0ed2a7c7190c 312
GordonSin 0:0ed2a7c7190c 313 /*
GordonSin 0:0ed2a7c7190c 314 * First see if we want to change our options to the old
GordonSin 0:0ed2a7c7190c 315 * forms because we have received old forms from the peer.
GordonSin 0:0ed2a7c7190c 316 */
GordonSin 0:0ed2a7c7190c 317 if (wo->neg_addr && !go->neg_addr && !go->old_addrs) {
GordonSin 0:0ed2a7c7190c 318 /* use the old style of address negotiation */
GordonSin 0:0ed2a7c7190c 319 go->neg_addr = 1;
GordonSin 0:0ed2a7c7190c 320 go->old_addrs = 1;
GordonSin 0:0ed2a7c7190c 321 }
GordonSin 0:0ed2a7c7190c 322 if (wo->neg_vj && !go->neg_vj && !go->old_vj) {
GordonSin 0:0ed2a7c7190c 323 /* try an older style of VJ negotiation */
GordonSin 0:0ed2a7c7190c 324 if (cis_received[f->unit] == 0) {
GordonSin 0:0ed2a7c7190c 325 /* keep trying the new style until we see some CI from the peer */
GordonSin 0:0ed2a7c7190c 326 go->neg_vj = 1;
GordonSin 0:0ed2a7c7190c 327 } else {
GordonSin 0:0ed2a7c7190c 328 /* use the old style only if the peer did */
GordonSin 0:0ed2a7c7190c 329 if (ho->neg_vj && ho->old_vj) {
GordonSin 0:0ed2a7c7190c 330 go->neg_vj = 1;
GordonSin 0:0ed2a7c7190c 331 go->old_vj = 1;
GordonSin 0:0ed2a7c7190c 332 go->vj_protocol = ho->vj_protocol;
GordonSin 0:0ed2a7c7190c 333 }
GordonSin 0:0ed2a7c7190c 334 }
GordonSin 0:0ed2a7c7190c 335 }
GordonSin 0:0ed2a7c7190c 336
GordonSin 0:0ed2a7c7190c 337 return (LENCIADDR(go->neg_addr, go->old_addrs) +
GordonSin 0:0ed2a7c7190c 338 LENCIVJ(go->neg_vj, go->old_vj) +
GordonSin 0:0ed2a7c7190c 339 LENCIDNS(go->req_dns1) +
GordonSin 0:0ed2a7c7190c 340 LENCIDNS(go->req_dns2));
GordonSin 0:0ed2a7c7190c 341 }
GordonSin 0:0ed2a7c7190c 342
GordonSin 0:0ed2a7c7190c 343
GordonSin 0:0ed2a7c7190c 344 /*
GordonSin 0:0ed2a7c7190c 345 * ipcp_addci - Add our desired CIs to a packet.
GordonSin 0:0ed2a7c7190c 346 */
GordonSin 0:0ed2a7c7190c 347 static void
GordonSin 0:0ed2a7c7190c 348 ipcp_addci(fsm *f, u_char *ucp, int *lenp)
GordonSin 0:0ed2a7c7190c 349 {
GordonSin 0:0ed2a7c7190c 350 ipcp_options *go = &ipcp_gotoptions[f->unit];
GordonSin 0:0ed2a7c7190c 351 int len = *lenp;
GordonSin 0:0ed2a7c7190c 352
GordonSin 0:0ed2a7c7190c 353 #define ADDCIVJ(opt, neg, val, old, maxslotindex, cflag) \
GordonSin 0:0ed2a7c7190c 354 if (neg) { \
GordonSin 0:0ed2a7c7190c 355 int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \
GordonSin 0:0ed2a7c7190c 356 if (len >= vjlen) { \
GordonSin 0:0ed2a7c7190c 357 PUTCHAR(opt, ucp); \
GordonSin 0:0ed2a7c7190c 358 PUTCHAR(vjlen, ucp); \
GordonSin 0:0ed2a7c7190c 359 PUTSHORT(val, ucp); \
GordonSin 0:0ed2a7c7190c 360 if (!old) { \
GordonSin 0:0ed2a7c7190c 361 PUTCHAR(maxslotindex, ucp); \
GordonSin 0:0ed2a7c7190c 362 PUTCHAR(cflag, ucp); \
GordonSin 0:0ed2a7c7190c 363 } \
GordonSin 0:0ed2a7c7190c 364 len -= vjlen; \
GordonSin 0:0ed2a7c7190c 365 } else { \
GordonSin 0:0ed2a7c7190c 366 neg = 0; \
GordonSin 0:0ed2a7c7190c 367 } \
GordonSin 0:0ed2a7c7190c 368 }
GordonSin 0:0ed2a7c7190c 369
GordonSin 0:0ed2a7c7190c 370 #define ADDCIADDR(opt, neg, old, val1, val2) \
GordonSin 0:0ed2a7c7190c 371 if (neg) { \
GordonSin 0:0ed2a7c7190c 372 int addrlen = (old? CILEN_ADDRS: CILEN_ADDR); \
GordonSin 0:0ed2a7c7190c 373 if (len >= addrlen) { \
GordonSin 0:0ed2a7c7190c 374 u32_t l; \
GordonSin 0:0ed2a7c7190c 375 PUTCHAR(opt, ucp); \
GordonSin 0:0ed2a7c7190c 376 PUTCHAR(addrlen, ucp); \
GordonSin 0:0ed2a7c7190c 377 l = ntohl(val1); \
GordonSin 0:0ed2a7c7190c 378 PUTLONG(l, ucp); \
GordonSin 0:0ed2a7c7190c 379 if (old) { \
GordonSin 0:0ed2a7c7190c 380 l = ntohl(val2); \
GordonSin 0:0ed2a7c7190c 381 PUTLONG(l, ucp); \
GordonSin 0:0ed2a7c7190c 382 } \
GordonSin 0:0ed2a7c7190c 383 len -= addrlen; \
GordonSin 0:0ed2a7c7190c 384 } else { \
GordonSin 0:0ed2a7c7190c 385 neg = 0; \
GordonSin 0:0ed2a7c7190c 386 } \
GordonSin 0:0ed2a7c7190c 387 }
GordonSin 0:0ed2a7c7190c 388
GordonSin 0:0ed2a7c7190c 389 #define ADDCIDNS(opt, neg, addr) \
GordonSin 0:0ed2a7c7190c 390 if (neg) { \
GordonSin 0:0ed2a7c7190c 391 if (len >= CILEN_ADDR) { \
GordonSin 0:0ed2a7c7190c 392 u32_t l; \
GordonSin 0:0ed2a7c7190c 393 PUTCHAR(opt, ucp); \
GordonSin 0:0ed2a7c7190c 394 PUTCHAR(CILEN_ADDR, ucp); \
GordonSin 0:0ed2a7c7190c 395 l = ntohl(addr); \
GordonSin 0:0ed2a7c7190c 396 PUTLONG(l, ucp); \
GordonSin 0:0ed2a7c7190c 397 len -= CILEN_ADDR; \
GordonSin 0:0ed2a7c7190c 398 } else { \
GordonSin 0:0ed2a7c7190c 399 neg = 0; \
GordonSin 0:0ed2a7c7190c 400 } \
GordonSin 0:0ed2a7c7190c 401 }
GordonSin 0:0ed2a7c7190c 402
GordonSin 0:0ed2a7c7190c 403 ADDCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), go->neg_addr,
GordonSin 0:0ed2a7c7190c 404 go->old_addrs, go->ouraddr, go->hisaddr);
GordonSin 0:0ed2a7c7190c 405
GordonSin 0:0ed2a7c7190c 406 ADDCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj,
GordonSin 0:0ed2a7c7190c 407 go->maxslotindex, go->cflag);
GordonSin 0:0ed2a7c7190c 408
GordonSin 0:0ed2a7c7190c 409 ADDCIDNS(CI_MS_DNS1, go->req_dns1, go->dnsaddr[0]);
GordonSin 0:0ed2a7c7190c 410
GordonSin 0:0ed2a7c7190c 411 ADDCIDNS(CI_MS_DNS2, go->req_dns2, go->dnsaddr[1]);
GordonSin 0:0ed2a7c7190c 412
GordonSin 0:0ed2a7c7190c 413 *lenp -= len;
GordonSin 0:0ed2a7c7190c 414 }
GordonSin 0:0ed2a7c7190c 415
GordonSin 0:0ed2a7c7190c 416
GordonSin 0:0ed2a7c7190c 417 /*
GordonSin 0:0ed2a7c7190c 418 * ipcp_ackci - Ack our CIs.
GordonSin 0:0ed2a7c7190c 419 *
GordonSin 0:0ed2a7c7190c 420 * Returns:
GordonSin 0:0ed2a7c7190c 421 * 0 - Ack was bad.
GordonSin 0:0ed2a7c7190c 422 * 1 - Ack was good.
GordonSin 0:0ed2a7c7190c 423 */
GordonSin 0:0ed2a7c7190c 424 static int
GordonSin 0:0ed2a7c7190c 425 ipcp_ackci(fsm *f, u_char *p, int len)
GordonSin 0:0ed2a7c7190c 426 {
GordonSin 0:0ed2a7c7190c 427 ipcp_options *go = &ipcp_gotoptions[f->unit];
GordonSin 0:0ed2a7c7190c 428 u_short cilen, citype, cishort;
GordonSin 0:0ed2a7c7190c 429 u32_t cilong;
GordonSin 0:0ed2a7c7190c 430 u_char cimaxslotindex, cicflag;
GordonSin 0:0ed2a7c7190c 431
GordonSin 0:0ed2a7c7190c 432 /*
GordonSin 0:0ed2a7c7190c 433 * CIs must be in exactly the same order that we sent...
GordonSin 0:0ed2a7c7190c 434 * Check packet length and CI length at each step.
GordonSin 0:0ed2a7c7190c 435 * If we find any deviations, then this packet is bad.
GordonSin 0:0ed2a7c7190c 436 */
GordonSin 0:0ed2a7c7190c 437
GordonSin 0:0ed2a7c7190c 438 #define ACKCIVJ(opt, neg, val, old, maxslotindex, cflag) \
GordonSin 0:0ed2a7c7190c 439 if (neg) { \
GordonSin 0:0ed2a7c7190c 440 int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \
GordonSin 0:0ed2a7c7190c 441 if ((len -= vjlen) < 0) { \
GordonSin 0:0ed2a7c7190c 442 goto bad; \
GordonSin 0:0ed2a7c7190c 443 } \
GordonSin 0:0ed2a7c7190c 444 GETCHAR(citype, p); \
GordonSin 0:0ed2a7c7190c 445 GETCHAR(cilen, p); \
GordonSin 0:0ed2a7c7190c 446 if (cilen != vjlen || \
GordonSin 0:0ed2a7c7190c 447 citype != opt) { \
GordonSin 0:0ed2a7c7190c 448 goto bad; \
GordonSin 0:0ed2a7c7190c 449 } \
GordonSin 0:0ed2a7c7190c 450 GETSHORT(cishort, p); \
GordonSin 0:0ed2a7c7190c 451 if (cishort != val) { \
GordonSin 0:0ed2a7c7190c 452 goto bad; \
GordonSin 0:0ed2a7c7190c 453 } \
GordonSin 0:0ed2a7c7190c 454 if (!old) { \
GordonSin 0:0ed2a7c7190c 455 GETCHAR(cimaxslotindex, p); \
GordonSin 0:0ed2a7c7190c 456 if (cimaxslotindex != maxslotindex) { \
GordonSin 0:0ed2a7c7190c 457 goto bad; \
GordonSin 0:0ed2a7c7190c 458 } \
GordonSin 0:0ed2a7c7190c 459 GETCHAR(cicflag, p); \
GordonSin 0:0ed2a7c7190c 460 if (cicflag != cflag) { \
GordonSin 0:0ed2a7c7190c 461 goto bad; \
GordonSin 0:0ed2a7c7190c 462 } \
GordonSin 0:0ed2a7c7190c 463 } \
GordonSin 0:0ed2a7c7190c 464 }
GordonSin 0:0ed2a7c7190c 465
GordonSin 0:0ed2a7c7190c 466 #define ACKCIADDR(opt, neg, old, val1, val2) \
GordonSin 0:0ed2a7c7190c 467 if (neg) { \
GordonSin 0:0ed2a7c7190c 468 int addrlen = (old? CILEN_ADDRS: CILEN_ADDR); \
GordonSin 0:0ed2a7c7190c 469 u32_t l; \
GordonSin 0:0ed2a7c7190c 470 if ((len -= addrlen) < 0) { \
GordonSin 0:0ed2a7c7190c 471 goto bad; \
GordonSin 0:0ed2a7c7190c 472 } \
GordonSin 0:0ed2a7c7190c 473 GETCHAR(citype, p); \
GordonSin 0:0ed2a7c7190c 474 GETCHAR(cilen, p); \
GordonSin 0:0ed2a7c7190c 475 if (cilen != addrlen || \
GordonSin 0:0ed2a7c7190c 476 citype != opt) { \
GordonSin 0:0ed2a7c7190c 477 goto bad; \
GordonSin 0:0ed2a7c7190c 478 } \
GordonSin 0:0ed2a7c7190c 479 GETLONG(l, p); \
GordonSin 0:0ed2a7c7190c 480 cilong = htonl(l); \
GordonSin 0:0ed2a7c7190c 481 if (val1 != cilong) { \
GordonSin 0:0ed2a7c7190c 482 goto bad; \
GordonSin 0:0ed2a7c7190c 483 } \
GordonSin 0:0ed2a7c7190c 484 if (old) { \
GordonSin 0:0ed2a7c7190c 485 GETLONG(l, p); \
GordonSin 0:0ed2a7c7190c 486 cilong = htonl(l); \
GordonSin 0:0ed2a7c7190c 487 if (val2 != cilong) { \
GordonSin 0:0ed2a7c7190c 488 goto bad; \
GordonSin 0:0ed2a7c7190c 489 } \
GordonSin 0:0ed2a7c7190c 490 } \
GordonSin 0:0ed2a7c7190c 491 }
GordonSin 0:0ed2a7c7190c 492
GordonSin 0:0ed2a7c7190c 493 #define ACKCIDNS(opt, neg, addr) \
GordonSin 0:0ed2a7c7190c 494 if (neg) { \
GordonSin 0:0ed2a7c7190c 495 u32_t l; \
GordonSin 0:0ed2a7c7190c 496 if ((len -= CILEN_ADDR) < 0) { \
GordonSin 0:0ed2a7c7190c 497 goto bad; \
GordonSin 0:0ed2a7c7190c 498 } \
GordonSin 0:0ed2a7c7190c 499 GETCHAR(citype, p); \
GordonSin 0:0ed2a7c7190c 500 GETCHAR(cilen, p); \
GordonSin 0:0ed2a7c7190c 501 if (cilen != CILEN_ADDR || \
GordonSin 0:0ed2a7c7190c 502 citype != opt) { \
GordonSin 0:0ed2a7c7190c 503 goto bad; \
GordonSin 0:0ed2a7c7190c 504 } \
GordonSin 0:0ed2a7c7190c 505 GETLONG(l, p); \
GordonSin 0:0ed2a7c7190c 506 cilong = htonl(l); \
GordonSin 0:0ed2a7c7190c 507 if (addr != cilong) { \
GordonSin 0:0ed2a7c7190c 508 goto bad; \
GordonSin 0:0ed2a7c7190c 509 } \
GordonSin 0:0ed2a7c7190c 510 }
GordonSin 0:0ed2a7c7190c 511
GordonSin 0:0ed2a7c7190c 512 ACKCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), go->neg_addr,
GordonSin 0:0ed2a7c7190c 513 go->old_addrs, go->ouraddr, go->hisaddr);
GordonSin 0:0ed2a7c7190c 514
GordonSin 0:0ed2a7c7190c 515 ACKCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj,
GordonSin 0:0ed2a7c7190c 516 go->maxslotindex, go->cflag);
GordonSin 0:0ed2a7c7190c 517
GordonSin 0:0ed2a7c7190c 518 ACKCIDNS(CI_MS_DNS1, go->req_dns1, go->dnsaddr[0]);
GordonSin 0:0ed2a7c7190c 519
GordonSin 0:0ed2a7c7190c 520 ACKCIDNS(CI_MS_DNS2, go->req_dns2, go->dnsaddr[1]);
GordonSin 0:0ed2a7c7190c 521
GordonSin 0:0ed2a7c7190c 522 /*
GordonSin 0:0ed2a7c7190c 523 * If there are any remaining CIs, then this packet is bad.
GordonSin 0:0ed2a7c7190c 524 */
GordonSin 0:0ed2a7c7190c 525 if (len != 0) {
GordonSin 0:0ed2a7c7190c 526 goto bad;
GordonSin 0:0ed2a7c7190c 527 }
GordonSin 0:0ed2a7c7190c 528 return (1);
GordonSin 0:0ed2a7c7190c 529
GordonSin 0:0ed2a7c7190c 530 bad:
GordonSin 0:0ed2a7c7190c 531 IPCPDEBUG(LOG_INFO, ("ipcp_ackci: received bad Ack!\n"));
GordonSin 0:0ed2a7c7190c 532 return (0);
GordonSin 0:0ed2a7c7190c 533 }
GordonSin 0:0ed2a7c7190c 534
GordonSin 0:0ed2a7c7190c 535 /*
GordonSin 0:0ed2a7c7190c 536 * ipcp_nakci - Peer has sent a NAK for some of our CIs.
GordonSin 0:0ed2a7c7190c 537 * This should not modify any state if the Nak is bad
GordonSin 0:0ed2a7c7190c 538 * or if IPCP is in the LS_OPENED state.
GordonSin 0:0ed2a7c7190c 539 *
GordonSin 0:0ed2a7c7190c 540 * Returns:
GordonSin 0:0ed2a7c7190c 541 * 0 - Nak was bad.
GordonSin 0:0ed2a7c7190c 542 * 1 - Nak was good.
GordonSin 0:0ed2a7c7190c 543 */
GordonSin 0:0ed2a7c7190c 544 static int
GordonSin 0:0ed2a7c7190c 545 ipcp_nakci(fsm *f, u_char *p, int len)
GordonSin 0:0ed2a7c7190c 546 {
GordonSin 0:0ed2a7c7190c 547 ipcp_options *go = &ipcp_gotoptions[f->unit];
GordonSin 0:0ed2a7c7190c 548 u_char cimaxslotindex, cicflag;
GordonSin 0:0ed2a7c7190c 549 u_char citype, cilen, *next;
GordonSin 0:0ed2a7c7190c 550 u_short cishort;
GordonSin 0:0ed2a7c7190c 551 u32_t ciaddr1, ciaddr2, l, cidnsaddr;
GordonSin 0:0ed2a7c7190c 552 ipcp_options no; /* options we've seen Naks for */
GordonSin 0:0ed2a7c7190c 553 ipcp_options try; /* options to request next time */
GordonSin 0:0ed2a7c7190c 554
GordonSin 0:0ed2a7c7190c 555 BZERO(&no, sizeof(no));
GordonSin 0:0ed2a7c7190c 556 try = *go;
GordonSin 0:0ed2a7c7190c 557
GordonSin 0:0ed2a7c7190c 558 /*
GordonSin 0:0ed2a7c7190c 559 * Any Nak'd CIs must be in exactly the same order that we sent.
GordonSin 0:0ed2a7c7190c 560 * Check packet length and CI length at each step.
GordonSin 0:0ed2a7c7190c 561 * If we find any deviations, then this packet is bad.
GordonSin 0:0ed2a7c7190c 562 */
GordonSin 0:0ed2a7c7190c 563 #define NAKCIADDR(opt, neg, old, code) \
GordonSin 0:0ed2a7c7190c 564 if (go->neg && \
GordonSin 0:0ed2a7c7190c 565 len >= (cilen = (old? CILEN_ADDRS: CILEN_ADDR)) && \
GordonSin 0:0ed2a7c7190c 566 p[1] == cilen && \
GordonSin 0:0ed2a7c7190c 567 p[0] == opt) { \
GordonSin 0:0ed2a7c7190c 568 len -= cilen; \
GordonSin 0:0ed2a7c7190c 569 INCPTR(2, p); \
GordonSin 0:0ed2a7c7190c 570 GETLONG(l, p); \
GordonSin 0:0ed2a7c7190c 571 ciaddr1 = htonl(l); \
GordonSin 0:0ed2a7c7190c 572 if (old) { \
GordonSin 0:0ed2a7c7190c 573 GETLONG(l, p); \
GordonSin 0:0ed2a7c7190c 574 ciaddr2 = htonl(l); \
GordonSin 0:0ed2a7c7190c 575 no.old_addrs = 1; \
GordonSin 0:0ed2a7c7190c 576 } else { \
GordonSin 0:0ed2a7c7190c 577 ciaddr2 = 0; \
GordonSin 0:0ed2a7c7190c 578 } \
GordonSin 0:0ed2a7c7190c 579 no.neg = 1; \
GordonSin 0:0ed2a7c7190c 580 code \
GordonSin 0:0ed2a7c7190c 581 }
GordonSin 0:0ed2a7c7190c 582
GordonSin 0:0ed2a7c7190c 583 #define NAKCIVJ(opt, neg, code) \
GordonSin 0:0ed2a7c7190c 584 if (go->neg && \
GordonSin 0:0ed2a7c7190c 585 ((cilen = p[1]) == CILEN_COMPRESS || cilen == CILEN_VJ) && \
GordonSin 0:0ed2a7c7190c 586 len >= cilen && \
GordonSin 0:0ed2a7c7190c 587 p[0] == opt) { \
GordonSin 0:0ed2a7c7190c 588 len -= cilen; \
GordonSin 0:0ed2a7c7190c 589 INCPTR(2, p); \
GordonSin 0:0ed2a7c7190c 590 GETSHORT(cishort, p); \
GordonSin 0:0ed2a7c7190c 591 no.neg = 1; \
GordonSin 0:0ed2a7c7190c 592 code \
GordonSin 0:0ed2a7c7190c 593 }
GordonSin 0:0ed2a7c7190c 594
GordonSin 0:0ed2a7c7190c 595 #define NAKCIDNS(opt, neg, code) \
GordonSin 0:0ed2a7c7190c 596 if (go->neg && \
GordonSin 0:0ed2a7c7190c 597 ((cilen = p[1]) == CILEN_ADDR) && \
GordonSin 0:0ed2a7c7190c 598 len >= cilen && \
GordonSin 0:0ed2a7c7190c 599 p[0] == opt) { \
GordonSin 0:0ed2a7c7190c 600 len -= cilen; \
GordonSin 0:0ed2a7c7190c 601 INCPTR(2, p); \
GordonSin 0:0ed2a7c7190c 602 GETLONG(l, p); \
GordonSin 0:0ed2a7c7190c 603 cidnsaddr = htonl(l); \
GordonSin 0:0ed2a7c7190c 604 no.neg = 1; \
GordonSin 0:0ed2a7c7190c 605 code \
GordonSin 0:0ed2a7c7190c 606 }
GordonSin 0:0ed2a7c7190c 607
GordonSin 0:0ed2a7c7190c 608 /*
GordonSin 0:0ed2a7c7190c 609 * Accept the peer's idea of {our,his} address, if different
GordonSin 0:0ed2a7c7190c 610 * from our idea, only if the accept_{local,remote} flag is set.
GordonSin 0:0ed2a7c7190c 611 */
GordonSin 0:0ed2a7c7190c 612 NAKCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), neg_addr, go->old_addrs,
GordonSin 0:0ed2a7c7190c 613 if (go->accept_local && ciaddr1) { /* Do we know our address? */
GordonSin 0:0ed2a7c7190c 614 try.ouraddr = ciaddr1;
GordonSin 0:0ed2a7c7190c 615 IPCPDEBUG(LOG_INFO, ("local IP address %s\n",
GordonSin 0:0ed2a7c7190c 616 inet_ntoa(ciaddr1)));
GordonSin 0:0ed2a7c7190c 617 }
GordonSin 0:0ed2a7c7190c 618 if (go->accept_remote && ciaddr2) { /* Does he know his? */
GordonSin 0:0ed2a7c7190c 619 try.hisaddr = ciaddr2;
GordonSin 0:0ed2a7c7190c 620 IPCPDEBUG(LOG_INFO, ("remote IP address %s\n",
GordonSin 0:0ed2a7c7190c 621 inet_ntoa(ciaddr2)));
GordonSin 0:0ed2a7c7190c 622 }
GordonSin 0:0ed2a7c7190c 623 );
GordonSin 0:0ed2a7c7190c 624
GordonSin 0:0ed2a7c7190c 625 /*
GordonSin 0:0ed2a7c7190c 626 * Accept the peer's value of maxslotindex provided that it
GordonSin 0:0ed2a7c7190c 627 * is less than what we asked for. Turn off slot-ID compression
GordonSin 0:0ed2a7c7190c 628 * if the peer wants. Send old-style compress-type option if
GordonSin 0:0ed2a7c7190c 629 * the peer wants.
GordonSin 0:0ed2a7c7190c 630 */
GordonSin 0:0ed2a7c7190c 631 NAKCIVJ(CI_COMPRESSTYPE, neg_vj,
GordonSin 0:0ed2a7c7190c 632 if (cilen == CILEN_VJ) {
GordonSin 0:0ed2a7c7190c 633 GETCHAR(cimaxslotindex, p);
GordonSin 0:0ed2a7c7190c 634 GETCHAR(cicflag, p);
GordonSin 0:0ed2a7c7190c 635 if (cishort == IPCP_VJ_COMP) {
GordonSin 0:0ed2a7c7190c 636 try.old_vj = 0;
GordonSin 0:0ed2a7c7190c 637 if (cimaxslotindex < go->maxslotindex) {
GordonSin 0:0ed2a7c7190c 638 try.maxslotindex = cimaxslotindex;
GordonSin 0:0ed2a7c7190c 639 }
GordonSin 0:0ed2a7c7190c 640 if (!cicflag) {
GordonSin 0:0ed2a7c7190c 641 try.cflag = 0;
GordonSin 0:0ed2a7c7190c 642 }
GordonSin 0:0ed2a7c7190c 643 } else {
GordonSin 0:0ed2a7c7190c 644 try.neg_vj = 0;
GordonSin 0:0ed2a7c7190c 645 }
GordonSin 0:0ed2a7c7190c 646 } else {
GordonSin 0:0ed2a7c7190c 647 if (cishort == IPCP_VJ_COMP || cishort == IPCP_VJ_COMP_OLD) {
GordonSin 0:0ed2a7c7190c 648 try.old_vj = 1;
GordonSin 0:0ed2a7c7190c 649 try.vj_protocol = cishort;
GordonSin 0:0ed2a7c7190c 650 } else {
GordonSin 0:0ed2a7c7190c 651 try.neg_vj = 0;
GordonSin 0:0ed2a7c7190c 652 }
GordonSin 0:0ed2a7c7190c 653 }
GordonSin 0:0ed2a7c7190c 654 );
GordonSin 0:0ed2a7c7190c 655
GordonSin 0:0ed2a7c7190c 656 NAKCIDNS(CI_MS_DNS1, req_dns1,
GordonSin 0:0ed2a7c7190c 657 try.dnsaddr[0] = cidnsaddr;
GordonSin 0:0ed2a7c7190c 658 IPCPDEBUG(LOG_INFO, ("primary DNS address %s\n", inet_ntoa(cidnsaddr)));
GordonSin 0:0ed2a7c7190c 659 );
GordonSin 0:0ed2a7c7190c 660
GordonSin 0:0ed2a7c7190c 661 NAKCIDNS(CI_MS_DNS2, req_dns2,
GordonSin 0:0ed2a7c7190c 662 try.dnsaddr[1] = cidnsaddr;
GordonSin 0:0ed2a7c7190c 663 IPCPDEBUG(LOG_INFO, ("secondary DNS address %s\n", inet_ntoa(cidnsaddr)));
GordonSin 0:0ed2a7c7190c 664 );
GordonSin 0:0ed2a7c7190c 665
GordonSin 0:0ed2a7c7190c 666 /*
GordonSin 0:0ed2a7c7190c 667 * There may be remaining CIs, if the peer is requesting negotiation
GordonSin 0:0ed2a7c7190c 668 * on an option that we didn't include in our request packet.
GordonSin 0:0ed2a7c7190c 669 * If they want to negotiate about IP addresses, we comply.
GordonSin 0:0ed2a7c7190c 670 * If they want us to ask for compression, we refuse.
GordonSin 0:0ed2a7c7190c 671 */
GordonSin 0:0ed2a7c7190c 672 while (len > CILEN_VOID) {
GordonSin 0:0ed2a7c7190c 673 GETCHAR(citype, p);
GordonSin 0:0ed2a7c7190c 674 GETCHAR(cilen, p);
GordonSin 0:0ed2a7c7190c 675 if( (len -= cilen) < 0 ) {
GordonSin 0:0ed2a7c7190c 676 goto bad;
GordonSin 0:0ed2a7c7190c 677 }
GordonSin 0:0ed2a7c7190c 678 next = p + cilen - 2;
GordonSin 0:0ed2a7c7190c 679
GordonSin 0:0ed2a7c7190c 680 switch (citype) {
GordonSin 0:0ed2a7c7190c 681 case CI_COMPRESSTYPE:
GordonSin 0:0ed2a7c7190c 682 if (go->neg_vj || no.neg_vj ||
GordonSin 0:0ed2a7c7190c 683 (cilen != CILEN_VJ && cilen != CILEN_COMPRESS)) {
GordonSin 0:0ed2a7c7190c 684 goto bad;
GordonSin 0:0ed2a7c7190c 685 }
GordonSin 0:0ed2a7c7190c 686 no.neg_vj = 1;
GordonSin 0:0ed2a7c7190c 687 break;
GordonSin 0:0ed2a7c7190c 688 case CI_ADDRS:
GordonSin 0:0ed2a7c7190c 689 if ((go->neg_addr && go->old_addrs) || no.old_addrs
GordonSin 0:0ed2a7c7190c 690 || cilen != CILEN_ADDRS) {
GordonSin 0:0ed2a7c7190c 691 goto bad;
GordonSin 0:0ed2a7c7190c 692 }
GordonSin 0:0ed2a7c7190c 693 try.neg_addr = 1;
GordonSin 0:0ed2a7c7190c 694 try.old_addrs = 1;
GordonSin 0:0ed2a7c7190c 695 GETLONG(l, p);
GordonSin 0:0ed2a7c7190c 696 ciaddr1 = htonl(l);
GordonSin 0:0ed2a7c7190c 697 if (ciaddr1 && go->accept_local) {
GordonSin 0:0ed2a7c7190c 698 try.ouraddr = ciaddr1;
GordonSin 0:0ed2a7c7190c 699 }
GordonSin 0:0ed2a7c7190c 700 GETLONG(l, p);
GordonSin 0:0ed2a7c7190c 701 ciaddr2 = htonl(l);
GordonSin 0:0ed2a7c7190c 702 if (ciaddr2 && go->accept_remote) {
GordonSin 0:0ed2a7c7190c 703 try.hisaddr = ciaddr2;
GordonSin 0:0ed2a7c7190c 704 }
GordonSin 0:0ed2a7c7190c 705 no.old_addrs = 1;
GordonSin 0:0ed2a7c7190c 706 break;
GordonSin 0:0ed2a7c7190c 707 case CI_ADDR:
GordonSin 0:0ed2a7c7190c 708 if (go->neg_addr || no.neg_addr || cilen != CILEN_ADDR) {
GordonSin 0:0ed2a7c7190c 709 goto bad;
GordonSin 0:0ed2a7c7190c 710 }
GordonSin 0:0ed2a7c7190c 711 try.old_addrs = 0;
GordonSin 0:0ed2a7c7190c 712 GETLONG(l, p);
GordonSin 0:0ed2a7c7190c 713 ciaddr1 = htonl(l);
GordonSin 0:0ed2a7c7190c 714 if (ciaddr1 && go->accept_local) {
GordonSin 0:0ed2a7c7190c 715 try.ouraddr = ciaddr1;
GordonSin 0:0ed2a7c7190c 716 }
GordonSin 0:0ed2a7c7190c 717 if (try.ouraddr != 0) {
GordonSin 0:0ed2a7c7190c 718 try.neg_addr = 1;
GordonSin 0:0ed2a7c7190c 719 }
GordonSin 0:0ed2a7c7190c 720 no.neg_addr = 1;
GordonSin 0:0ed2a7c7190c 721 break;
GordonSin 0:0ed2a7c7190c 722 }
GordonSin 0:0ed2a7c7190c 723 p = next;
GordonSin 0:0ed2a7c7190c 724 }
GordonSin 0:0ed2a7c7190c 725
GordonSin 0:0ed2a7c7190c 726 /* If there is still anything left, this packet is bad. */
GordonSin 0:0ed2a7c7190c 727 if (len != 0) {
GordonSin 0:0ed2a7c7190c 728 goto bad;
GordonSin 0:0ed2a7c7190c 729 }
GordonSin 0:0ed2a7c7190c 730
GordonSin 0:0ed2a7c7190c 731 /*
GordonSin 0:0ed2a7c7190c 732 * OK, the Nak is good. Now we can update state.
GordonSin 0:0ed2a7c7190c 733 */
GordonSin 0:0ed2a7c7190c 734 if (f->state != LS_OPENED) {
GordonSin 0:0ed2a7c7190c 735 *go = try;
GordonSin 0:0ed2a7c7190c 736 }
GordonSin 0:0ed2a7c7190c 737
GordonSin 0:0ed2a7c7190c 738 return 1;
GordonSin 0:0ed2a7c7190c 739
GordonSin 0:0ed2a7c7190c 740 bad:
GordonSin 0:0ed2a7c7190c 741 IPCPDEBUG(LOG_INFO, ("ipcp_nakci: received bad Nak!\n"));
GordonSin 0:0ed2a7c7190c 742 return 0;
GordonSin 0:0ed2a7c7190c 743 }
GordonSin 0:0ed2a7c7190c 744
GordonSin 0:0ed2a7c7190c 745
GordonSin 0:0ed2a7c7190c 746 /*
GordonSin 0:0ed2a7c7190c 747 * ipcp_rejci - Reject some of our CIs.
GordonSin 0:0ed2a7c7190c 748 */
GordonSin 0:0ed2a7c7190c 749 static int
GordonSin 0:0ed2a7c7190c 750 ipcp_rejci(fsm *f, u_char *p, int len)
GordonSin 0:0ed2a7c7190c 751 {
GordonSin 0:0ed2a7c7190c 752 ipcp_options *go = &ipcp_gotoptions[f->unit];
GordonSin 0:0ed2a7c7190c 753 u_char cimaxslotindex, ciflag, cilen;
GordonSin 0:0ed2a7c7190c 754 u_short cishort;
GordonSin 0:0ed2a7c7190c 755 u32_t cilong;
GordonSin 0:0ed2a7c7190c 756 ipcp_options try; /* options to request next time */
GordonSin 0:0ed2a7c7190c 757
GordonSin 0:0ed2a7c7190c 758 try = *go;
GordonSin 0:0ed2a7c7190c 759 /*
GordonSin 0:0ed2a7c7190c 760 * Any Rejected CIs must be in exactly the same order that we sent.
GordonSin 0:0ed2a7c7190c 761 * Check packet length and CI length at each step.
GordonSin 0:0ed2a7c7190c 762 * If we find any deviations, then this packet is bad.
GordonSin 0:0ed2a7c7190c 763 */
GordonSin 0:0ed2a7c7190c 764 #define REJCIADDR(opt, neg, old, val1, val2) \
GordonSin 0:0ed2a7c7190c 765 if (go->neg && \
GordonSin 0:0ed2a7c7190c 766 len >= (cilen = old? CILEN_ADDRS: CILEN_ADDR) && \
GordonSin 0:0ed2a7c7190c 767 p[1] == cilen && \
GordonSin 0:0ed2a7c7190c 768 p[0] == opt) { \
GordonSin 0:0ed2a7c7190c 769 u32_t l; \
GordonSin 0:0ed2a7c7190c 770 len -= cilen; \
GordonSin 0:0ed2a7c7190c 771 INCPTR(2, p); \
GordonSin 0:0ed2a7c7190c 772 GETLONG(l, p); \
GordonSin 0:0ed2a7c7190c 773 cilong = htonl(l); \
GordonSin 0:0ed2a7c7190c 774 /* Check rejected value. */ \
GordonSin 0:0ed2a7c7190c 775 if (cilong != val1) { \
GordonSin 0:0ed2a7c7190c 776 goto bad; \
GordonSin 0:0ed2a7c7190c 777 } \
GordonSin 0:0ed2a7c7190c 778 if (old) { \
GordonSin 0:0ed2a7c7190c 779 GETLONG(l, p); \
GordonSin 0:0ed2a7c7190c 780 cilong = htonl(l); \
GordonSin 0:0ed2a7c7190c 781 /* Check rejected value. */ \
GordonSin 0:0ed2a7c7190c 782 if (cilong != val2) { \
GordonSin 0:0ed2a7c7190c 783 goto bad; \
GordonSin 0:0ed2a7c7190c 784 } \
GordonSin 0:0ed2a7c7190c 785 } \
GordonSin 0:0ed2a7c7190c 786 try.neg = 0; \
GordonSin 0:0ed2a7c7190c 787 }
GordonSin 0:0ed2a7c7190c 788
GordonSin 0:0ed2a7c7190c 789 #define REJCIVJ(opt, neg, val, old, maxslot, cflag) \
GordonSin 0:0ed2a7c7190c 790 if (go->neg && \
GordonSin 0:0ed2a7c7190c 791 p[1] == (old? CILEN_COMPRESS : CILEN_VJ) && \
GordonSin 0:0ed2a7c7190c 792 len >= p[1] && \
GordonSin 0:0ed2a7c7190c 793 p[0] == opt) { \
GordonSin 0:0ed2a7c7190c 794 len -= p[1]; \
GordonSin 0:0ed2a7c7190c 795 INCPTR(2, p); \
GordonSin 0:0ed2a7c7190c 796 GETSHORT(cishort, p); \
GordonSin 0:0ed2a7c7190c 797 /* Check rejected value. */ \
GordonSin 0:0ed2a7c7190c 798 if (cishort != val) { \
GordonSin 0:0ed2a7c7190c 799 goto bad; \
GordonSin 0:0ed2a7c7190c 800 } \
GordonSin 0:0ed2a7c7190c 801 if (!old) { \
GordonSin 0:0ed2a7c7190c 802 GETCHAR(cimaxslotindex, p); \
GordonSin 0:0ed2a7c7190c 803 if (cimaxslotindex != maxslot) { \
GordonSin 0:0ed2a7c7190c 804 goto bad; \
GordonSin 0:0ed2a7c7190c 805 } \
GordonSin 0:0ed2a7c7190c 806 GETCHAR(ciflag, p); \
GordonSin 0:0ed2a7c7190c 807 if (ciflag != cflag) { \
GordonSin 0:0ed2a7c7190c 808 goto bad; \
GordonSin 0:0ed2a7c7190c 809 } \
GordonSin 0:0ed2a7c7190c 810 } \
GordonSin 0:0ed2a7c7190c 811 try.neg = 0; \
GordonSin 0:0ed2a7c7190c 812 }
GordonSin 0:0ed2a7c7190c 813
GordonSin 0:0ed2a7c7190c 814 #define REJCIDNS(opt, neg, dnsaddr) \
GordonSin 0:0ed2a7c7190c 815 if (go->neg && \
GordonSin 0:0ed2a7c7190c 816 ((cilen = p[1]) == CILEN_ADDR) && \
GordonSin 0:0ed2a7c7190c 817 len >= cilen && \
GordonSin 0:0ed2a7c7190c 818 p[0] == opt) { \
GordonSin 0:0ed2a7c7190c 819 u32_t l; \
GordonSin 0:0ed2a7c7190c 820 len -= cilen; \
GordonSin 0:0ed2a7c7190c 821 INCPTR(2, p); \
GordonSin 0:0ed2a7c7190c 822 GETLONG(l, p); \
GordonSin 0:0ed2a7c7190c 823 cilong = htonl(l); \
GordonSin 0:0ed2a7c7190c 824 /* Check rejected value. */ \
GordonSin 0:0ed2a7c7190c 825 if (cilong != dnsaddr) { \
GordonSin 0:0ed2a7c7190c 826 goto bad; \
GordonSin 0:0ed2a7c7190c 827 } \
GordonSin 0:0ed2a7c7190c 828 try.neg = 0; \
GordonSin 0:0ed2a7c7190c 829 }
GordonSin 0:0ed2a7c7190c 830
GordonSin 0:0ed2a7c7190c 831 REJCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), neg_addr,
GordonSin 0:0ed2a7c7190c 832 go->old_addrs, go->ouraddr, go->hisaddr);
GordonSin 0:0ed2a7c7190c 833
GordonSin 0:0ed2a7c7190c 834 REJCIVJ(CI_COMPRESSTYPE, neg_vj, go->vj_protocol, go->old_vj,
GordonSin 0:0ed2a7c7190c 835 go->maxslotindex, go->cflag);
GordonSin 0:0ed2a7c7190c 836
GordonSin 0:0ed2a7c7190c 837 REJCIDNS(CI_MS_DNS1, req_dns1, go->dnsaddr[0]);
GordonSin 0:0ed2a7c7190c 838
GordonSin 0:0ed2a7c7190c 839 REJCIDNS(CI_MS_DNS2, req_dns2, go->dnsaddr[1]);
GordonSin 0:0ed2a7c7190c 840
GordonSin 0:0ed2a7c7190c 841 /*
GordonSin 0:0ed2a7c7190c 842 * If there are any remaining CIs, then this packet is bad.
GordonSin 0:0ed2a7c7190c 843 */
GordonSin 0:0ed2a7c7190c 844 if (len != 0) {
GordonSin 0:0ed2a7c7190c 845 goto bad;
GordonSin 0:0ed2a7c7190c 846 }
GordonSin 0:0ed2a7c7190c 847 /*
GordonSin 0:0ed2a7c7190c 848 * Now we can update state.
GordonSin 0:0ed2a7c7190c 849 */
GordonSin 0:0ed2a7c7190c 850 if (f->state != LS_OPENED) {
GordonSin 0:0ed2a7c7190c 851 *go = try;
GordonSin 0:0ed2a7c7190c 852 }
GordonSin 0:0ed2a7c7190c 853 return 1;
GordonSin 0:0ed2a7c7190c 854
GordonSin 0:0ed2a7c7190c 855 bad:
GordonSin 0:0ed2a7c7190c 856 IPCPDEBUG(LOG_INFO, ("ipcp_rejci: received bad Reject!\n"));
GordonSin 0:0ed2a7c7190c 857 return 0;
GordonSin 0:0ed2a7c7190c 858 }
GordonSin 0:0ed2a7c7190c 859
GordonSin 0:0ed2a7c7190c 860
GordonSin 0:0ed2a7c7190c 861 /*
GordonSin 0:0ed2a7c7190c 862 * ipcp_reqci - Check the peer's requested CIs and send appropriate response.
GordonSin 0:0ed2a7c7190c 863 *
GordonSin 0:0ed2a7c7190c 864 * Returns: CONFACK, CONFNAK or CONFREJ and input packet modified
GordonSin 0:0ed2a7c7190c 865 * appropriately. If reject_if_disagree is non-zero, doesn't return
GordonSin 0:0ed2a7c7190c 866 * CONFNAK; returns CONFREJ if it can't return CONFACK.
GordonSin 0:0ed2a7c7190c 867 */
GordonSin 0:0ed2a7c7190c 868 static int
GordonSin 0:0ed2a7c7190c 869 ipcp_reqci(fsm *f, u_char *inp/* Requested CIs */,int *len/* Length of requested CIs */,int reject_if_disagree)
GordonSin 0:0ed2a7c7190c 870 {
GordonSin 0:0ed2a7c7190c 871 ipcp_options *wo = &ipcp_wantoptions[f->unit];
GordonSin 0:0ed2a7c7190c 872 ipcp_options *ho = &ipcp_hisoptions[f->unit];
GordonSin 0:0ed2a7c7190c 873 ipcp_options *ao = &ipcp_allowoptions[f->unit];
GordonSin 0:0ed2a7c7190c 874 #ifdef OLD_CI_ADDRS
GordonSin 0:0ed2a7c7190c 875 ipcp_options *go = &ipcp_gotoptions[f->unit];
GordonSin 0:0ed2a7c7190c 876 #endif
GordonSin 0:0ed2a7c7190c 877 u_char *cip, *next; /* Pointer to current and next CIs */
GordonSin 0:0ed2a7c7190c 878 u_short cilen, citype; /* Parsed len, type */
GordonSin 0:0ed2a7c7190c 879 u_short cishort; /* Parsed short value */
GordonSin 0:0ed2a7c7190c 880 u32_t tl, ciaddr1; /* Parsed address values */
GordonSin 0:0ed2a7c7190c 881 #ifdef OLD_CI_ADDRS
GordonSin 0:0ed2a7c7190c 882 u32_t ciaddr2; /* Parsed address values */
GordonSin 0:0ed2a7c7190c 883 #endif
GordonSin 0:0ed2a7c7190c 884 int rc = CONFACK; /* Final packet return code */
GordonSin 0:0ed2a7c7190c 885 int orc; /* Individual option return code */
GordonSin 0:0ed2a7c7190c 886 u_char *p; /* Pointer to next char to parse */
GordonSin 0:0ed2a7c7190c 887 u_char *ucp = inp; /* Pointer to current output char */
GordonSin 0:0ed2a7c7190c 888 int l = *len; /* Length left */
GordonSin 0:0ed2a7c7190c 889 u_char maxslotindex, cflag;
GordonSin 0:0ed2a7c7190c 890 int d;
GordonSin 0:0ed2a7c7190c 891
GordonSin 0:0ed2a7c7190c 892 cis_received[f->unit] = 1;
GordonSin 0:0ed2a7c7190c 893
GordonSin 0:0ed2a7c7190c 894 /*
GordonSin 0:0ed2a7c7190c 895 * Reset all his options.
GordonSin 0:0ed2a7c7190c 896 */
GordonSin 0:0ed2a7c7190c 897 BZERO(ho, sizeof(*ho));
GordonSin 0:0ed2a7c7190c 898
GordonSin 0:0ed2a7c7190c 899 /*
GordonSin 0:0ed2a7c7190c 900 * Process all his options.
GordonSin 0:0ed2a7c7190c 901 */
GordonSin 0:0ed2a7c7190c 902 next = inp;
GordonSin 0:0ed2a7c7190c 903 while (l) {
GordonSin 0:0ed2a7c7190c 904 orc = CONFACK; /* Assume success */
GordonSin 0:0ed2a7c7190c 905 cip = p = next; /* Remember begining of CI */
GordonSin 0:0ed2a7c7190c 906 if (l < 2 || /* Not enough data for CI header or */
GordonSin 0:0ed2a7c7190c 907 p[1] < 2 || /* CI length too small or */
GordonSin 0:0ed2a7c7190c 908 p[1] > l) { /* CI length too big? */
GordonSin 0:0ed2a7c7190c 909 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: bad CI length!\n"));
GordonSin 0:0ed2a7c7190c 910 orc = CONFREJ; /* Reject bad CI */
GordonSin 0:0ed2a7c7190c 911 cilen = (u_short)l;/* Reject till end of packet */
GordonSin 0:0ed2a7c7190c 912 l = 0; /* Don't loop again */
GordonSin 0:0ed2a7c7190c 913 goto endswitch;
GordonSin 0:0ed2a7c7190c 914 }
GordonSin 0:0ed2a7c7190c 915 GETCHAR(citype, p); /* Parse CI type */
GordonSin 0:0ed2a7c7190c 916 GETCHAR(cilen, p); /* Parse CI length */
GordonSin 0:0ed2a7c7190c 917 l -= cilen; /* Adjust remaining length */
GordonSin 0:0ed2a7c7190c 918 next += cilen; /* Step to next CI */
GordonSin 0:0ed2a7c7190c 919
GordonSin 0:0ed2a7c7190c 920 switch (citype) { /* Check CI type */
GordonSin 0:0ed2a7c7190c 921 #ifdef OLD_CI_ADDRS /* Need to save space... */
GordonSin 0:0ed2a7c7190c 922 case CI_ADDRS:
GordonSin 0:0ed2a7c7190c 923 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received ADDRS\n"));
GordonSin 0:0ed2a7c7190c 924 if (!ao->neg_addr ||
GordonSin 0:0ed2a7c7190c 925 cilen != CILEN_ADDRS) { /* Check CI length */
GordonSin 0:0ed2a7c7190c 926 orc = CONFREJ; /* Reject CI */
GordonSin 0:0ed2a7c7190c 927 break;
GordonSin 0:0ed2a7c7190c 928 }
GordonSin 0:0ed2a7c7190c 929
GordonSin 0:0ed2a7c7190c 930 /*
GordonSin 0:0ed2a7c7190c 931 * If he has no address, or if we both have his address but
GordonSin 0:0ed2a7c7190c 932 * disagree about it, then NAK it with our idea.
GordonSin 0:0ed2a7c7190c 933 * In particular, if we don't know his address, but he does,
GordonSin 0:0ed2a7c7190c 934 * then accept it.
GordonSin 0:0ed2a7c7190c 935 */
GordonSin 0:0ed2a7c7190c 936 GETLONG(tl, p); /* Parse source address (his) */
GordonSin 0:0ed2a7c7190c 937 ciaddr1 = htonl(tl);
GordonSin 0:0ed2a7c7190c 938 IPCPDEBUG(LOG_INFO, ("his addr %s\n", inet_ntoa(ciaddr1)));
GordonSin 0:0ed2a7c7190c 939 if (ciaddr1 != wo->hisaddr
GordonSin 0:0ed2a7c7190c 940 && (ciaddr1 == 0 || !wo->accept_remote)) {
GordonSin 0:0ed2a7c7190c 941 orc = CONFNAK;
GordonSin 0:0ed2a7c7190c 942 if (!reject_if_disagree) {
GordonSin 0:0ed2a7c7190c 943 DECPTR(sizeof(u32_t), p);
GordonSin 0:0ed2a7c7190c 944 tl = ntohl(wo->hisaddr);
GordonSin 0:0ed2a7c7190c 945 PUTLONG(tl, p);
GordonSin 0:0ed2a7c7190c 946 }
GordonSin 0:0ed2a7c7190c 947 } else if (ciaddr1 == 0 && wo->hisaddr == 0) {
GordonSin 0:0ed2a7c7190c 948 /*
GordonSin 0:0ed2a7c7190c 949 * If neither we nor he knows his address, reject the option.
GordonSin 0:0ed2a7c7190c 950 */
GordonSin 0:0ed2a7c7190c 951 orc = CONFREJ;
GordonSin 0:0ed2a7c7190c 952 wo->req_addr = 0; /* don't NAK with 0.0.0.0 later */
GordonSin 0:0ed2a7c7190c 953 break;
GordonSin 0:0ed2a7c7190c 954 }
GordonSin 0:0ed2a7c7190c 955
GordonSin 0:0ed2a7c7190c 956 /*
GordonSin 0:0ed2a7c7190c 957 * If he doesn't know our address, or if we both have our address
GordonSin 0:0ed2a7c7190c 958 * but disagree about it, then NAK it with our idea.
GordonSin 0:0ed2a7c7190c 959 */
GordonSin 0:0ed2a7c7190c 960 GETLONG(tl, p); /* Parse desination address (ours) */
GordonSin 0:0ed2a7c7190c 961 ciaddr2 = htonl(tl);
GordonSin 0:0ed2a7c7190c 962 IPCPDEBUG(LOG_INFO, ("our addr %s\n", inet_ntoa(ciaddr2)));
GordonSin 0:0ed2a7c7190c 963 if (ciaddr2 != wo->ouraddr) {
GordonSin 0:0ed2a7c7190c 964 if (ciaddr2 == 0 || !wo->accept_local) {
GordonSin 0:0ed2a7c7190c 965 orc = CONFNAK;
GordonSin 0:0ed2a7c7190c 966 if (!reject_if_disagree) {
GordonSin 0:0ed2a7c7190c 967 DECPTR(sizeof(u32_t), p);
GordonSin 0:0ed2a7c7190c 968 tl = ntohl(wo->ouraddr);
GordonSin 0:0ed2a7c7190c 969 PUTLONG(tl, p);
GordonSin 0:0ed2a7c7190c 970 }
GordonSin 0:0ed2a7c7190c 971 } else {
GordonSin 0:0ed2a7c7190c 972 go->ouraddr = ciaddr2; /* accept peer's idea */
GordonSin 0:0ed2a7c7190c 973 }
GordonSin 0:0ed2a7c7190c 974 }
GordonSin 0:0ed2a7c7190c 975
GordonSin 0:0ed2a7c7190c 976 ho->neg_addr = 1;
GordonSin 0:0ed2a7c7190c 977 ho->old_addrs = 1;
GordonSin 0:0ed2a7c7190c 978 ho->hisaddr = ciaddr1;
GordonSin 0:0ed2a7c7190c 979 ho->ouraddr = ciaddr2;
GordonSin 0:0ed2a7c7190c 980 break;
GordonSin 0:0ed2a7c7190c 981 #endif
GordonSin 0:0ed2a7c7190c 982
GordonSin 0:0ed2a7c7190c 983 case CI_ADDR:
GordonSin 0:0ed2a7c7190c 984 if (!ao->neg_addr) {
GordonSin 0:0ed2a7c7190c 985 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR not allowed\n"));
GordonSin 0:0ed2a7c7190c 986 orc = CONFREJ; /* Reject CI */
GordonSin 0:0ed2a7c7190c 987 break;
GordonSin 0:0ed2a7c7190c 988 } else if (cilen != CILEN_ADDR) { /* Check CI length */
GordonSin 0:0ed2a7c7190c 989 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR bad len\n"));
GordonSin 0:0ed2a7c7190c 990 orc = CONFREJ; /* Reject CI */
GordonSin 0:0ed2a7c7190c 991 break;
GordonSin 0:0ed2a7c7190c 992 }
GordonSin 0:0ed2a7c7190c 993
GordonSin 0:0ed2a7c7190c 994 /*
GordonSin 0:0ed2a7c7190c 995 * If he has no address, or if we both have his address but
GordonSin 0:0ed2a7c7190c 996 * disagree about it, then NAK it with our idea.
GordonSin 0:0ed2a7c7190c 997 * In particular, if we don't know his address, but he does,
GordonSin 0:0ed2a7c7190c 998 * then accept it.
GordonSin 0:0ed2a7c7190c 999 */
GordonSin 0:0ed2a7c7190c 1000 GETLONG(tl, p); /* Parse source address (his) */
GordonSin 0:0ed2a7c7190c 1001 ciaddr1 = htonl(tl);
GordonSin 0:0ed2a7c7190c 1002 if (ciaddr1 != wo->hisaddr
GordonSin 0:0ed2a7c7190c 1003 && (ciaddr1 == 0 || !wo->accept_remote)) {
GordonSin 0:0ed2a7c7190c 1004 orc = CONFNAK;
GordonSin 0:0ed2a7c7190c 1005 if (!reject_if_disagree) {
GordonSin 0:0ed2a7c7190c 1006 DECPTR(sizeof(u32_t), p);
GordonSin 0:0ed2a7c7190c 1007 tl = ntohl(wo->hisaddr);
GordonSin 0:0ed2a7c7190c 1008 PUTLONG(tl, p);
GordonSin 0:0ed2a7c7190c 1009 }
GordonSin 0:0ed2a7c7190c 1010 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Nak ADDR %s\n", inet_ntoa(ciaddr1)));
GordonSin 0:0ed2a7c7190c 1011 } else if (ciaddr1 == 0 && wo->hisaddr == 0) {
GordonSin 0:0ed2a7c7190c 1012 /*
GordonSin 0:0ed2a7c7190c 1013 * Don't ACK an address of 0.0.0.0 - reject it instead.
GordonSin 0:0ed2a7c7190c 1014 */
GordonSin 0:0ed2a7c7190c 1015 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR %s\n", inet_ntoa(ciaddr1)));
GordonSin 0:0ed2a7c7190c 1016 orc = CONFREJ;
GordonSin 0:0ed2a7c7190c 1017 wo->req_addr = 0; /* don't NAK with 0.0.0.0 later */
GordonSin 0:0ed2a7c7190c 1018 break;
GordonSin 0:0ed2a7c7190c 1019 }
GordonSin 0:0ed2a7c7190c 1020
GordonSin 0:0ed2a7c7190c 1021 ho->neg_addr = 1;
GordonSin 0:0ed2a7c7190c 1022 ho->hisaddr = ciaddr1;
GordonSin 0:0ed2a7c7190c 1023 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: ADDR %s\n", inet_ntoa(ciaddr1)));
GordonSin 0:0ed2a7c7190c 1024 break;
GordonSin 0:0ed2a7c7190c 1025
GordonSin 0:0ed2a7c7190c 1026 case CI_MS_DNS1:
GordonSin 0:0ed2a7c7190c 1027 case CI_MS_DNS2:
GordonSin 0:0ed2a7c7190c 1028 /* Microsoft primary or secondary DNS request */
GordonSin 0:0ed2a7c7190c 1029 d = citype == CI_MS_DNS2;
GordonSin 0:0ed2a7c7190c 1030
GordonSin 0:0ed2a7c7190c 1031 /* If we do not have a DNS address then we cannot send it */
GordonSin 0:0ed2a7c7190c 1032 if (ao->dnsaddr[d] == 0 ||
GordonSin 0:0ed2a7c7190c 1033 cilen != CILEN_ADDR) { /* Check CI length */
GordonSin 0:0ed2a7c7190c 1034 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting DNS%d Request\n", d+1));
GordonSin 0:0ed2a7c7190c 1035 orc = CONFREJ; /* Reject CI */
GordonSin 0:0ed2a7c7190c 1036 break;
GordonSin 0:0ed2a7c7190c 1037 }
GordonSin 0:0ed2a7c7190c 1038 GETLONG(tl, p);
GordonSin 0:0ed2a7c7190c 1039 if (htonl(tl) != ao->dnsaddr[d]) {
GordonSin 0:0ed2a7c7190c 1040 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking DNS%d Request %s\n",
GordonSin 0:0ed2a7c7190c 1041 d+1, inet_ntoa(tl)));
GordonSin 0:0ed2a7c7190c 1042 DECPTR(sizeof(u32_t), p);
GordonSin 0:0ed2a7c7190c 1043 tl = ntohl(ao->dnsaddr[d]);
GordonSin 0:0ed2a7c7190c 1044 PUTLONG(tl, p);
GordonSin 0:0ed2a7c7190c 1045 orc = CONFNAK;
GordonSin 0:0ed2a7c7190c 1046 }
GordonSin 0:0ed2a7c7190c 1047 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received DNS%d Request\n", d+1));
GordonSin 0:0ed2a7c7190c 1048 break;
GordonSin 0:0ed2a7c7190c 1049
GordonSin 0:0ed2a7c7190c 1050 case CI_MS_WINS1:
GordonSin 0:0ed2a7c7190c 1051 case CI_MS_WINS2:
GordonSin 0:0ed2a7c7190c 1052 /* Microsoft primary or secondary WINS request */
GordonSin 0:0ed2a7c7190c 1053 d = citype == CI_MS_WINS2;
GordonSin 0:0ed2a7c7190c 1054 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received WINS%d Request\n", d+1));
GordonSin 0:0ed2a7c7190c 1055
GordonSin 0:0ed2a7c7190c 1056 /* If we do not have a DNS address then we cannot send it */
GordonSin 0:0ed2a7c7190c 1057 if (ao->winsaddr[d] == 0 ||
GordonSin 0:0ed2a7c7190c 1058 cilen != CILEN_ADDR) { /* Check CI length */
GordonSin 0:0ed2a7c7190c 1059 orc = CONFREJ; /* Reject CI */
GordonSin 0:0ed2a7c7190c 1060 break;
GordonSin 0:0ed2a7c7190c 1061 }
GordonSin 0:0ed2a7c7190c 1062 GETLONG(tl, p);
GordonSin 0:0ed2a7c7190c 1063 if (htonl(tl) != ao->winsaddr[d]) {
GordonSin 0:0ed2a7c7190c 1064 DECPTR(sizeof(u32_t), p);
GordonSin 0:0ed2a7c7190c 1065 tl = ntohl(ao->winsaddr[d]);
GordonSin 0:0ed2a7c7190c 1066 PUTLONG(tl, p);
GordonSin 0:0ed2a7c7190c 1067 orc = CONFNAK;
GordonSin 0:0ed2a7c7190c 1068 }
GordonSin 0:0ed2a7c7190c 1069 break;
GordonSin 0:0ed2a7c7190c 1070
GordonSin 0:0ed2a7c7190c 1071 case CI_COMPRESSTYPE:
GordonSin 0:0ed2a7c7190c 1072 if (!ao->neg_vj) {
GordonSin 0:0ed2a7c7190c 1073 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE not allowed\n"));
GordonSin 0:0ed2a7c7190c 1074 orc = CONFREJ;
GordonSin 0:0ed2a7c7190c 1075 break;
GordonSin 0:0ed2a7c7190c 1076 } else if (cilen != CILEN_VJ && cilen != CILEN_COMPRESS) {
GordonSin 0:0ed2a7c7190c 1077 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE len=%d\n", cilen));
GordonSin 0:0ed2a7c7190c 1078 orc = CONFREJ;
GordonSin 0:0ed2a7c7190c 1079 break;
GordonSin 0:0ed2a7c7190c 1080 }
GordonSin 0:0ed2a7c7190c 1081 GETSHORT(cishort, p);
GordonSin 0:0ed2a7c7190c 1082
GordonSin 0:0ed2a7c7190c 1083 if (!(cishort == IPCP_VJ_COMP ||
GordonSin 0:0ed2a7c7190c 1084 (cishort == IPCP_VJ_COMP_OLD && cilen == CILEN_COMPRESS))) {
GordonSin 0:0ed2a7c7190c 1085 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE %d\n", cishort));
GordonSin 0:0ed2a7c7190c 1086 orc = CONFREJ;
GordonSin 0:0ed2a7c7190c 1087 break;
GordonSin 0:0ed2a7c7190c 1088 }
GordonSin 0:0ed2a7c7190c 1089
GordonSin 0:0ed2a7c7190c 1090 ho->neg_vj = 1;
GordonSin 0:0ed2a7c7190c 1091 ho->vj_protocol = cishort;
GordonSin 0:0ed2a7c7190c 1092 if (cilen == CILEN_VJ) {
GordonSin 0:0ed2a7c7190c 1093 GETCHAR(maxslotindex, p);
GordonSin 0:0ed2a7c7190c 1094 if (maxslotindex > ao->maxslotindex) {
GordonSin 0:0ed2a7c7190c 1095 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking VJ max slot %d\n", maxslotindex));
GordonSin 0:0ed2a7c7190c 1096 orc = CONFNAK;
GordonSin 0:0ed2a7c7190c 1097 if (!reject_if_disagree) {
GordonSin 0:0ed2a7c7190c 1098 DECPTR(1, p);
GordonSin 0:0ed2a7c7190c 1099 PUTCHAR(ao->maxslotindex, p);
GordonSin 0:0ed2a7c7190c 1100 }
GordonSin 0:0ed2a7c7190c 1101 }
GordonSin 0:0ed2a7c7190c 1102 GETCHAR(cflag, p);
GordonSin 0:0ed2a7c7190c 1103 if (cflag && !ao->cflag) {
GordonSin 0:0ed2a7c7190c 1104 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking VJ cflag %d\n", cflag));
GordonSin 0:0ed2a7c7190c 1105 orc = CONFNAK;
GordonSin 0:0ed2a7c7190c 1106 if (!reject_if_disagree) {
GordonSin 0:0ed2a7c7190c 1107 DECPTR(1, p);
GordonSin 0:0ed2a7c7190c 1108 PUTCHAR(wo->cflag, p);
GordonSin 0:0ed2a7c7190c 1109 }
GordonSin 0:0ed2a7c7190c 1110 }
GordonSin 0:0ed2a7c7190c 1111 ho->maxslotindex = maxslotindex;
GordonSin 0:0ed2a7c7190c 1112 ho->cflag = cflag;
GordonSin 0:0ed2a7c7190c 1113 } else {
GordonSin 0:0ed2a7c7190c 1114 ho->old_vj = 1;
GordonSin 0:0ed2a7c7190c 1115 ho->maxslotindex = MAX_SLOTS - 1;
GordonSin 0:0ed2a7c7190c 1116 ho->cflag = 1;
GordonSin 0:0ed2a7c7190c 1117 }
GordonSin 0:0ed2a7c7190c 1118 IPCPDEBUG(LOG_INFO, (
GordonSin 0:0ed2a7c7190c 1119 "ipcp_reqci: received COMPRESSTYPE p=%d old=%d maxslot=%d cflag=%d\n",
GordonSin 0:0ed2a7c7190c 1120 ho->vj_protocol, ho->old_vj, ho->maxslotindex, ho->cflag));
GordonSin 0:0ed2a7c7190c 1121 break;
GordonSin 0:0ed2a7c7190c 1122
GordonSin 0:0ed2a7c7190c 1123 default:
GordonSin 0:0ed2a7c7190c 1124 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting unknown CI type %d\n", citype));
GordonSin 0:0ed2a7c7190c 1125 orc = CONFREJ;
GordonSin 0:0ed2a7c7190c 1126 break;
GordonSin 0:0ed2a7c7190c 1127 }
GordonSin 0:0ed2a7c7190c 1128
GordonSin 0:0ed2a7c7190c 1129 endswitch:
GordonSin 0:0ed2a7c7190c 1130 if (orc == CONFACK && /* Good CI */
GordonSin 0:0ed2a7c7190c 1131 rc != CONFACK) { /* but prior CI wasnt? */
GordonSin 0:0ed2a7c7190c 1132 continue; /* Don't send this one */
GordonSin 0:0ed2a7c7190c 1133 }
GordonSin 0:0ed2a7c7190c 1134
GordonSin 0:0ed2a7c7190c 1135 if (orc == CONFNAK) { /* Nak this CI? */
GordonSin 0:0ed2a7c7190c 1136 if (reject_if_disagree) { /* Getting fed up with sending NAKs? */
GordonSin 0:0ed2a7c7190c 1137 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting too many naks\n"));
GordonSin 0:0ed2a7c7190c 1138 orc = CONFREJ; /* Get tough if so */
GordonSin 0:0ed2a7c7190c 1139 } else {
GordonSin 0:0ed2a7c7190c 1140 if (rc == CONFREJ) { /* Rejecting prior CI? */
GordonSin 0:0ed2a7c7190c 1141 continue; /* Don't send this one */
GordonSin 0:0ed2a7c7190c 1142 }
GordonSin 0:0ed2a7c7190c 1143 if (rc == CONFACK) { /* Ack'd all prior CIs? */
GordonSin 0:0ed2a7c7190c 1144 rc = CONFNAK; /* Not anymore... */
GordonSin 0:0ed2a7c7190c 1145 ucp = inp; /* Backup */
GordonSin 0:0ed2a7c7190c 1146 }
GordonSin 0:0ed2a7c7190c 1147 }
GordonSin 0:0ed2a7c7190c 1148 }
GordonSin 0:0ed2a7c7190c 1149
GordonSin 0:0ed2a7c7190c 1150 if (orc == CONFREJ && /* Reject this CI */
GordonSin 0:0ed2a7c7190c 1151 rc != CONFREJ) { /* but no prior ones? */
GordonSin 0:0ed2a7c7190c 1152 rc = CONFREJ;
GordonSin 0:0ed2a7c7190c 1153 ucp = inp; /* Backup */
GordonSin 0:0ed2a7c7190c 1154 }
GordonSin 0:0ed2a7c7190c 1155
GordonSin 0:0ed2a7c7190c 1156 /* Need to move CI? */
GordonSin 0:0ed2a7c7190c 1157 if (ucp != cip) {
GordonSin 0:0ed2a7c7190c 1158 BCOPY(cip, ucp, cilen); /* Move it */
GordonSin 0:0ed2a7c7190c 1159 }
GordonSin 0:0ed2a7c7190c 1160
GordonSin 0:0ed2a7c7190c 1161 /* Update output pointer */
GordonSin 0:0ed2a7c7190c 1162 INCPTR(cilen, ucp);
GordonSin 0:0ed2a7c7190c 1163 }
GordonSin 0:0ed2a7c7190c 1164
GordonSin 0:0ed2a7c7190c 1165 /*
GordonSin 0:0ed2a7c7190c 1166 * If we aren't rejecting this packet, and we want to negotiate
GordonSin 0:0ed2a7c7190c 1167 * their address, and they didn't send their address, then we
GordonSin 0:0ed2a7c7190c 1168 * send a NAK with a CI_ADDR option appended. We assume the
GordonSin 0:0ed2a7c7190c 1169 * input buffer is long enough that we can append the extra
GordonSin 0:0ed2a7c7190c 1170 * option safely.
GordonSin 0:0ed2a7c7190c 1171 */
GordonSin 0:0ed2a7c7190c 1172 if (rc != CONFREJ && !ho->neg_addr &&
GordonSin 0:0ed2a7c7190c 1173 wo->req_addr && !reject_if_disagree) {
GordonSin 0:0ed2a7c7190c 1174 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Requesting peer address\n"));
GordonSin 0:0ed2a7c7190c 1175 if (rc == CONFACK) {
GordonSin 0:0ed2a7c7190c 1176 rc = CONFNAK;
GordonSin 0:0ed2a7c7190c 1177 ucp = inp; /* reset pointer */
GordonSin 0:0ed2a7c7190c 1178 wo->req_addr = 0; /* don't ask again */
GordonSin 0:0ed2a7c7190c 1179 }
GordonSin 0:0ed2a7c7190c 1180 PUTCHAR(CI_ADDR, ucp);
GordonSin 0:0ed2a7c7190c 1181 PUTCHAR(CILEN_ADDR, ucp);
GordonSin 0:0ed2a7c7190c 1182 tl = ntohl(wo->hisaddr);
GordonSin 0:0ed2a7c7190c 1183 PUTLONG(tl, ucp);
GordonSin 0:0ed2a7c7190c 1184 }
GordonSin 0:0ed2a7c7190c 1185
GordonSin 0:0ed2a7c7190c 1186 *len = (int)(ucp - inp); /* Compute output length */
GordonSin 0:0ed2a7c7190c 1187 IPCPDEBUG(LOG_INFO, ("ipcp_reqci: returning Configure-%s\n", CODENAME(rc)));
GordonSin 0:0ed2a7c7190c 1188 return (rc); /* Return final code */
GordonSin 0:0ed2a7c7190c 1189 }
GordonSin 0:0ed2a7c7190c 1190
GordonSin 0:0ed2a7c7190c 1191
GordonSin 0:0ed2a7c7190c 1192 #if 0
GordonSin 0:0ed2a7c7190c 1193 /*
GordonSin 0:0ed2a7c7190c 1194 * ip_check_options - check that any IP-related options are OK,
GordonSin 0:0ed2a7c7190c 1195 * and assign appropriate defaults.
GordonSin 0:0ed2a7c7190c 1196 */
GordonSin 0:0ed2a7c7190c 1197 static void
GordonSin 0:0ed2a7c7190c 1198 ip_check_options(u_long localAddr)
GordonSin 0:0ed2a7c7190c 1199 {
GordonSin 0:0ed2a7c7190c 1200 ipcp_options *wo = &ipcp_wantoptions[0];
GordonSin 0:0ed2a7c7190c 1201
GordonSin 0:0ed2a7c7190c 1202 /*
GordonSin 0:0ed2a7c7190c 1203 * Load our default IP address but allow the remote host to give us
GordonSin 0:0ed2a7c7190c 1204 * a new address.
GordonSin 0:0ed2a7c7190c 1205 */
GordonSin 0:0ed2a7c7190c 1206 if (wo->ouraddr == 0 && !ppp_settings.disable_defaultip) {
GordonSin 0:0ed2a7c7190c 1207 wo->accept_local = 1; /* don't insist on this default value */
GordonSin 0:0ed2a7c7190c 1208 wo->ouraddr = htonl(localAddr);
GordonSin 0:0ed2a7c7190c 1209 }
GordonSin 0:0ed2a7c7190c 1210 }
GordonSin 0:0ed2a7c7190c 1211 #endif
GordonSin 0:0ed2a7c7190c 1212
GordonSin 0:0ed2a7c7190c 1213
GordonSin 0:0ed2a7c7190c 1214 /*
GordonSin 0:0ed2a7c7190c 1215 * ipcp_up - IPCP has come UP.
GordonSin 0:0ed2a7c7190c 1216 *
GordonSin 0:0ed2a7c7190c 1217 * Configure the IP network interface appropriately and bring it up.
GordonSin 0:0ed2a7c7190c 1218 */
GordonSin 0:0ed2a7c7190c 1219 static void
GordonSin 0:0ed2a7c7190c 1220 ipcp_up(fsm *f)
GordonSin 0:0ed2a7c7190c 1221 {
GordonSin 0:0ed2a7c7190c 1222 u32_t mask;
GordonSin 0:0ed2a7c7190c 1223 ipcp_options *ho = &ipcp_hisoptions[f->unit];
GordonSin 0:0ed2a7c7190c 1224 ipcp_options *go = &ipcp_gotoptions[f->unit];
GordonSin 0:0ed2a7c7190c 1225 ipcp_options *wo = &ipcp_wantoptions[f->unit];
GordonSin 0:0ed2a7c7190c 1226
GordonSin 0:0ed2a7c7190c 1227 np_up(f->unit, PPP_IP);
GordonSin 0:0ed2a7c7190c 1228 IPCPDEBUG(LOG_INFO, ("ipcp: up\n"));
GordonSin 0:0ed2a7c7190c 1229
GordonSin 0:0ed2a7c7190c 1230 /*
GordonSin 0:0ed2a7c7190c 1231 * We must have a non-zero IP address for both ends of the link.
GordonSin 0:0ed2a7c7190c 1232 */
GordonSin 0:0ed2a7c7190c 1233 if (!ho->neg_addr) {
GordonSin 0:0ed2a7c7190c 1234 ho->hisaddr = wo->hisaddr;
GordonSin 0:0ed2a7c7190c 1235 }
GordonSin 0:0ed2a7c7190c 1236
GordonSin 0:0ed2a7c7190c 1237 if (ho->hisaddr == 0) {
GordonSin 0:0ed2a7c7190c 1238 #if 0
GordonSin 0:0ed2a7c7190c 1239 IPCPDEBUG(LOG_ERR, ("Could not determine remote IP address\n"));
GordonSin 0:0ed2a7c7190c 1240 ipcp_close(f->unit, "Could not determine remote IP address");
GordonSin 0:0ed2a7c7190c 1241 return;
GordonSin 0:0ed2a7c7190c 1242 #else //Kludge
GordonSin 0:0ed2a7c7190c 1243 ho->hisaddr = 0; //Set remote IP to 0.0.0.0, this is needed as most 3g providers do not advertise the remote IP to the user
GordonSin 0:0ed2a7c7190c 1244 #endif
GordonSin 0:0ed2a7c7190c 1245 }
GordonSin 0:0ed2a7c7190c 1246 if (go->ouraddr == 0) {
GordonSin 0:0ed2a7c7190c 1247 IPCPDEBUG(LOG_ERR, ("Could not determine local IP address\n"));
GordonSin 0:0ed2a7c7190c 1248 ipcp_close(f->unit, "Could not determine local IP address");
GordonSin 0:0ed2a7c7190c 1249 return;
GordonSin 0:0ed2a7c7190c 1250 }
GordonSin 0:0ed2a7c7190c 1251
GordonSin 0:0ed2a7c7190c 1252 if (ppp_settings.usepeerdns && (go->dnsaddr[0] || go->dnsaddr[1])) {
GordonSin 0:0ed2a7c7190c 1253 /*pppGotDNSAddrs(go->dnsaddr[0], go->dnsaddr[1]);*/
GordonSin 0:0ed2a7c7190c 1254 }
GordonSin 0:0ed2a7c7190c 1255
GordonSin 0:0ed2a7c7190c 1256 /*
GordonSin 0:0ed2a7c7190c 1257 * Check that the peer is allowed to use the IP address it wants.
GordonSin 0:0ed2a7c7190c 1258 */
GordonSin 0:0ed2a7c7190c 1259 if (!auth_ip_addr(f->unit, ho->hisaddr)) {
GordonSin 0:0ed2a7c7190c 1260 IPCPDEBUG(LOG_ERR, ("Peer is not authorized to use remote address %s\n",
GordonSin 0:0ed2a7c7190c 1261 inet_ntoa(ho->hisaddr)));
GordonSin 0:0ed2a7c7190c 1262 ipcp_close(f->unit, "Unauthorized remote IP address");
GordonSin 0:0ed2a7c7190c 1263 return;
GordonSin 0:0ed2a7c7190c 1264 }
GordonSin 0:0ed2a7c7190c 1265
GordonSin 0:0ed2a7c7190c 1266 /* set tcp compression */
GordonSin 0:0ed2a7c7190c 1267 sifvjcomp(f->unit, ho->neg_vj, ho->cflag, ho->maxslotindex);
GordonSin 0:0ed2a7c7190c 1268
GordonSin 0:0ed2a7c7190c 1269 /*
GordonSin 0:0ed2a7c7190c 1270 * Set IP addresses and (if specified) netmask.
GordonSin 0:0ed2a7c7190c 1271 */
GordonSin 0:0ed2a7c7190c 1272 mask = GetMask(go->ouraddr);
GordonSin 0:0ed2a7c7190c 1273
GordonSin 0:0ed2a7c7190c 1274 if (!sifaddr(f->unit, go->ouraddr, ho->hisaddr, mask, go->dnsaddr[0], go->dnsaddr[1])) {
GordonSin 0:0ed2a7c7190c 1275 IPCPDEBUG(LOG_WARNING, ("sifaddr failed\n"));
GordonSin 0:0ed2a7c7190c 1276 ipcp_close(f->unit, "Interface configuration failed");
GordonSin 0:0ed2a7c7190c 1277 return;
GordonSin 0:0ed2a7c7190c 1278 }
GordonSin 0:0ed2a7c7190c 1279
GordonSin 0:0ed2a7c7190c 1280 /* bring the interface up for IP */
GordonSin 0:0ed2a7c7190c 1281 if (!sifup(f->unit)) {
GordonSin 0:0ed2a7c7190c 1282 IPCPDEBUG(LOG_WARNING, ("sifup failed\n"));
GordonSin 0:0ed2a7c7190c 1283 ipcp_close(f->unit, "Interface configuration failed");
GordonSin 0:0ed2a7c7190c 1284 return;
GordonSin 0:0ed2a7c7190c 1285 }
GordonSin 0:0ed2a7c7190c 1286
GordonSin 0:0ed2a7c7190c 1287 sifnpmode(f->unit, PPP_IP, NPMODE_PASS);
GordonSin 0:0ed2a7c7190c 1288
GordonSin 0:0ed2a7c7190c 1289 /* assign a default route through the interface if required */
GordonSin 0:0ed2a7c7190c 1290 if (ipcp_wantoptions[f->unit].default_route) {
GordonSin 0:0ed2a7c7190c 1291 if (sifdefaultroute(f->unit, go->ouraddr, ho->hisaddr)) {
GordonSin 0:0ed2a7c7190c 1292 default_route_set[f->unit] = 1;
GordonSin 0:0ed2a7c7190c 1293 }
GordonSin 0:0ed2a7c7190c 1294 }
GordonSin 0:0ed2a7c7190c 1295
GordonSin 0:0ed2a7c7190c 1296 IPCPDEBUG(LOG_NOTICE, ("local IP address %s\n", inet_ntoa(go->ouraddr)));
GordonSin 0:0ed2a7c7190c 1297 IPCPDEBUG(LOG_NOTICE, ("remote IP address %s\n", inet_ntoa(ho->hisaddr)));
GordonSin 0:0ed2a7c7190c 1298 if (go->dnsaddr[0]) {
GordonSin 0:0ed2a7c7190c 1299 IPCPDEBUG(LOG_NOTICE, ("primary DNS address %s\n", inet_ntoa(go->dnsaddr[0])));
GordonSin 0:0ed2a7c7190c 1300 }
GordonSin 0:0ed2a7c7190c 1301 if (go->dnsaddr[1]) {
GordonSin 0:0ed2a7c7190c 1302 IPCPDEBUG(LOG_NOTICE, ("secondary DNS address %s\n", inet_ntoa(go->dnsaddr[1])));
GordonSin 0:0ed2a7c7190c 1303 }
GordonSin 0:0ed2a7c7190c 1304 }
GordonSin 0:0ed2a7c7190c 1305
GordonSin 0:0ed2a7c7190c 1306
GordonSin 0:0ed2a7c7190c 1307 /*
GordonSin 0:0ed2a7c7190c 1308 * ipcp_down - IPCP has gone DOWN.
GordonSin 0:0ed2a7c7190c 1309 *
GordonSin 0:0ed2a7c7190c 1310 * Take the IP network interface down, clear its addresses
GordonSin 0:0ed2a7c7190c 1311 * and delete routes through it.
GordonSin 0:0ed2a7c7190c 1312 */
GordonSin 0:0ed2a7c7190c 1313 static void
GordonSin 0:0ed2a7c7190c 1314 ipcp_down(fsm *f)
GordonSin 0:0ed2a7c7190c 1315 {
GordonSin 0:0ed2a7c7190c 1316 IPCPDEBUG(LOG_INFO, ("ipcp: down\n"));
GordonSin 0:0ed2a7c7190c 1317 np_down(f->unit, PPP_IP);
GordonSin 0:0ed2a7c7190c 1318 sifvjcomp(f->unit, 0, 0, 0);
GordonSin 0:0ed2a7c7190c 1319
GordonSin 0:0ed2a7c7190c 1320 sifdown(f->unit);
GordonSin 0:0ed2a7c7190c 1321 ipcp_clear_addrs(f->unit);
GordonSin 0:0ed2a7c7190c 1322 }
GordonSin 0:0ed2a7c7190c 1323
GordonSin 0:0ed2a7c7190c 1324
GordonSin 0:0ed2a7c7190c 1325 /*
GordonSin 0:0ed2a7c7190c 1326 * ipcp_clear_addrs() - clear the interface addresses, routes, etc.
GordonSin 0:0ed2a7c7190c 1327 */
GordonSin 0:0ed2a7c7190c 1328 static void
GordonSin 0:0ed2a7c7190c 1329 ipcp_clear_addrs(int unit)
GordonSin 0:0ed2a7c7190c 1330 {
GordonSin 0:0ed2a7c7190c 1331 u32_t ouraddr, hisaddr;
GordonSin 0:0ed2a7c7190c 1332
GordonSin 0:0ed2a7c7190c 1333 ouraddr = ipcp_gotoptions[unit].ouraddr;
GordonSin 0:0ed2a7c7190c 1334 hisaddr = ipcp_hisoptions[unit].hisaddr;
GordonSin 0:0ed2a7c7190c 1335 if (default_route_set[unit]) {
GordonSin 0:0ed2a7c7190c 1336 cifdefaultroute(unit, ouraddr, hisaddr);
GordonSin 0:0ed2a7c7190c 1337 default_route_set[unit] = 0;
GordonSin 0:0ed2a7c7190c 1338 }
GordonSin 0:0ed2a7c7190c 1339 cifaddr(unit, ouraddr, hisaddr);
GordonSin 0:0ed2a7c7190c 1340 }
GordonSin 0:0ed2a7c7190c 1341
GordonSin 0:0ed2a7c7190c 1342
GordonSin 0:0ed2a7c7190c 1343 /*
GordonSin 0:0ed2a7c7190c 1344 * ipcp_finished - possibly shut down the lower layers.
GordonSin 0:0ed2a7c7190c 1345 */
GordonSin 0:0ed2a7c7190c 1346 static void
GordonSin 0:0ed2a7c7190c 1347 ipcp_finished(fsm *f)
GordonSin 0:0ed2a7c7190c 1348 {
GordonSin 0:0ed2a7c7190c 1349 np_finished(f->unit, PPP_IP);
GordonSin 0:0ed2a7c7190c 1350 }
GordonSin 0:0ed2a7c7190c 1351
GordonSin 0:0ed2a7c7190c 1352 #if PPP_ADDITIONAL_CALLBACKS
GordonSin 0:0ed2a7c7190c 1353 static int
GordonSin 0:0ed2a7c7190c 1354 ipcp_printpkt(u_char *p, int plen, void (*printer) (void *, char *, ...), void *arg)
GordonSin 0:0ed2a7c7190c 1355 {
GordonSin 0:0ed2a7c7190c 1356 LWIP_UNUSED_ARG(p);
GordonSin 0:0ed2a7c7190c 1357 LWIP_UNUSED_ARG(plen);
GordonSin 0:0ed2a7c7190c 1358 LWIP_UNUSED_ARG(printer);
GordonSin 0:0ed2a7c7190c 1359 LWIP_UNUSED_ARG(arg);
GordonSin 0:0ed2a7c7190c 1360 return 0;
GordonSin 0:0ed2a7c7190c 1361 }
GordonSin 0:0ed2a7c7190c 1362
GordonSin 0:0ed2a7c7190c 1363 /*
GordonSin 0:0ed2a7c7190c 1364 * ip_active_pkt - see if this IP packet is worth bringing the link up for.
GordonSin 0:0ed2a7c7190c 1365 * We don't bring the link up for IP fragments or for TCP FIN packets
GordonSin 0:0ed2a7c7190c 1366 * with no data.
GordonSin 0:0ed2a7c7190c 1367 */
GordonSin 0:0ed2a7c7190c 1368 #define IP_HDRLEN 20 /* bytes */
GordonSin 0:0ed2a7c7190c 1369 #define IP_OFFMASK 0x1fff
GordonSin 0:0ed2a7c7190c 1370 #define IPPROTO_TCP 6
GordonSin 0:0ed2a7c7190c 1371 #define TCP_HDRLEN 20
GordonSin 0:0ed2a7c7190c 1372 #define TH_FIN 0x01
GordonSin 0:0ed2a7c7190c 1373
GordonSin 0:0ed2a7c7190c 1374 /*
GordonSin 0:0ed2a7c7190c 1375 * We use these macros because the IP header may be at an odd address,
GordonSin 0:0ed2a7c7190c 1376 * and some compilers might use word loads to get th_off or ip_hl.
GordonSin 0:0ed2a7c7190c 1377 */
GordonSin 0:0ed2a7c7190c 1378
GordonSin 0:0ed2a7c7190c 1379 #define net_short(x) (((x)[0] << 8) + (x)[1])
GordonSin 0:0ed2a7c7190c 1380 #define get_iphl(x) (((unsigned char *)(x))[0] & 0xF)
GordonSin 0:0ed2a7c7190c 1381 #define get_ipoff(x) net_short((unsigned char *)(x) + 6)
GordonSin 0:0ed2a7c7190c 1382 #define get_ipproto(x) (((unsigned char *)(x))[9])
GordonSin 0:0ed2a7c7190c 1383 #define get_tcpoff(x) (((unsigned char *)(x))[12] >> 4)
GordonSin 0:0ed2a7c7190c 1384 #define get_tcpflags(x) (((unsigned char *)(x))[13])
GordonSin 0:0ed2a7c7190c 1385
GordonSin 0:0ed2a7c7190c 1386 static int
GordonSin 0:0ed2a7c7190c 1387 ip_active_pkt(u_char *pkt, int len)
GordonSin 0:0ed2a7c7190c 1388 {
GordonSin 0:0ed2a7c7190c 1389 u_char *tcp;
GordonSin 0:0ed2a7c7190c 1390 int hlen;
GordonSin 0:0ed2a7c7190c 1391
GordonSin 0:0ed2a7c7190c 1392 len -= PPP_HDRLEN;
GordonSin 0:0ed2a7c7190c 1393 pkt += PPP_HDRLEN;
GordonSin 0:0ed2a7c7190c 1394 if (len < IP_HDRLEN) {
GordonSin 0:0ed2a7c7190c 1395 return 0;
GordonSin 0:0ed2a7c7190c 1396 }
GordonSin 0:0ed2a7c7190c 1397 if ((get_ipoff(pkt) & IP_OFFMASK) != 0) {
GordonSin 0:0ed2a7c7190c 1398 return 0;
GordonSin 0:0ed2a7c7190c 1399 }
GordonSin 0:0ed2a7c7190c 1400 if (get_ipproto(pkt) != IPPROTO_TCP) {
GordonSin 0:0ed2a7c7190c 1401 return 1;
GordonSin 0:0ed2a7c7190c 1402 }
GordonSin 0:0ed2a7c7190c 1403 hlen = get_iphl(pkt) * 4;
GordonSin 0:0ed2a7c7190c 1404 if (len < hlen + TCP_HDRLEN) {
GordonSin 0:0ed2a7c7190c 1405 return 0;
GordonSin 0:0ed2a7c7190c 1406 }
GordonSin 0:0ed2a7c7190c 1407 tcp = pkt + hlen;
GordonSin 0:0ed2a7c7190c 1408 if ((get_tcpflags(tcp) & TH_FIN) != 0 && len == hlen + get_tcpoff(tcp) * 4) {
GordonSin 0:0ed2a7c7190c 1409 return 0;
GordonSin 0:0ed2a7c7190c 1410 }
GordonSin 0:0ed2a7c7190c 1411 return 1;
GordonSin 0:0ed2a7c7190c 1412 }
GordonSin 0:0ed2a7c7190c 1413 #endif /* PPP_ADDITIONAL_CALLBACKS */
GordonSin 0:0ed2a7c7190c 1414
GordonSin 0:0ed2a7c7190c 1415 #endif /* PPP_SUPPORT */