1 /* $OpenBSD: print-dhcp6.c,v 1.6 2007/10/07 16:41:05 deraadt Exp $ */ 2 3 /* 4 * Copyright (C) 1998 and 1999 WIDE Project. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the project nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #ifndef lint 33 static const char rcsid[] = 34 "@(#) $Id: print-dhcp6.c,v 1.6 2007/10/07 16:41:05 deraadt Exp $"; 35 #endif 36 37 #ifdef INET6 38 39 #include <sys/param.h> 40 #include <sys/time.h> 41 #include <sys/socket.h> 42 43 struct mbuf; 44 struct rtentry; 45 #include <net/if.h> 46 47 #include <netinet/in.h> 48 49 #include <ctype.h> 50 #ifdef HAVE_MEMORY_H 51 #include <memory.h> 52 #endif 53 #include <stdio.h> 54 #include <string.h> 55 #include <arpa/inet.h> 56 57 #include "interface.h" 58 #include "addrtoname.h" 59 #include "dhcp6.h" 60 #include "dhcp6opt.h" 61 62 #if 0 63 static void dhcp6opttab_init(void); 64 static struct dhcp6_opt *dhcp6opttab_byname(char *); 65 #endif 66 static struct dhcp6_opt *dhcp6opttab_bycode(u_int); 67 68 static char tstr[] = " [|dhcp6]"; 69 70 static struct dhcp6_opt dh6opttab[] = { 71 /* IP Address Extension */ 72 { 1, OL6_N, "IP Address", OT6_NONE, }, 73 74 /* General Extension */ 75 { 2, 4, "Time Offset", OT6_NUM, }, 76 { 3, OL6_N, "IEEE 1003.1 POSIX Timezone", OT6_STR, }, 77 { 6, OL6_16N, "Domain Name Server", OT6_V6, }, 78 { 10, OL6_N, "Domain Name", OT6_STR, }, 79 80 /* Application and Service Parameters */ 81 { 16, OL6_N, "Directory Agent", OT6_NONE, }, 82 { 17, OL6_N, "Service Scope" , OT6_NONE, }, 83 { 18, OL6_16N, "Network Time Protocol Servers", OT6_V6, }, 84 { 19, OL6_N, "NIS Domain", OT6_STR, }, 85 { 20, OL6_16N, "NIS Servers", OT6_V6, }, 86 { 21, OL6_N, "NIS+ Domain", OT6_STR, }, 87 { 22, OL6_16N, "NIS+ Servers", OT6_V6, }, 88 89 /* TCP Parameters */ 90 { 32, 4, "TCP Keepalive Interval", OT6_NUM, }, 91 92 /* DHCPv6 Extensions */ 93 { 40, 4, "Maximum DHCPv6 Message Size", OT6_NUM, }, 94 { 41, OL6_N, "DHCP Retransmission and Configuration Parameter", 95 OT6_NONE, }, 96 { 48, OL6_N, "Platform Specific Information", OT6_NONE, }, 97 { 49, OL6_N, "Platform Class Identifier", OT6_STR, }, 98 { 64, OL6_N, "Class Identifier", OT6_STR, }, 99 { 66, 16, "Reconfigure Multicast Address", OT6_V6, }, 100 { 67, 16, "Renumber DHCPv6 Server Address", 101 OT6_V6, }, 102 { 68, OL6_N, "DHCP Relay ICMP Error Message", OT6_NONE, }, 103 { 84, OL6_N, "Client-Server Authentication", OT6_NONE, }, 104 { 85, 4, "Client Key Selection", OT6_NUM, }, 105 106 /* End Extension */ 107 { 65536, OL6_Z, "End", OT6_NONE, }, 108 109 { 0 }, 110 }; 111 112 #if 0 113 static struct dhcp6_opt *dh6o_pad; 114 static struct dhcp6_opt *dh6o_end; 115 116 static void 117 dhcp6opttab_init() 118 { 119 dh6o_pad = dhcp6opttab_bycode(0); 120 dh6o_end = dhcp6opttab_bycode(65536); 121 } 122 #endif 123 124 #if 0 125 static struct dhcp6_opt * 126 dhcp6opttab_byname(name) 127 char *name; 128 { 129 struct dhcp6_opt *p; 130 131 for (p = dh6opttab; p->code; p++) 132 if (strcmp(name, p->name) == 0) 133 return p; 134 return NULL; 135 } 136 #endif 137 138 static struct dhcp6_opt * 139 dhcp6opttab_bycode(code) 140 u_int code; 141 { 142 struct dhcp6_opt *p; 143 144 for (p = dh6opttab; p->code; p++) 145 if (p->code == code) 146 return p; 147 return NULL; 148 } 149 150 static void 151 dhcp6ext_print(u_char *cp, u_char *ep) 152 { 153 u_int16_t code, len; 154 struct dhcp6_opt *p; 155 char buf[BUFSIZ]; 156 int i; 157 158 if (cp == ep) 159 return; 160 printf(" "); 161 while (cp < ep) { 162 code = ntohs(*(u_int16_t *)&cp[0]); 163 if (code != 65535) 164 len = ntohs(*(u_int16_t *)&cp[2]); 165 else 166 len = 0; 167 p = dhcp6opttab_bycode(code); 168 if (p == NULL) { 169 printf("(unknown, len=%d)", len); 170 cp += len + 4; 171 continue; 172 } 173 174 /* sanity check on length */ 175 switch (p->len) { 176 case OL6_N: 177 break; 178 case OL6_16N: 179 if (len % 16 != 0) 180 goto trunc; 181 break; 182 case OL6_Z: 183 if (len != 0) 184 goto trunc; 185 break; 186 default: 187 if (len != p->len) 188 goto trunc; 189 break; 190 } 191 if (cp + 4 + len > ep) { 192 printf("[|%s]", p->name); 193 return; 194 } 195 196 printf("(%s, ", p->name); 197 switch (p->type) { 198 case OT6_V6: 199 for (i = 0; i < len; i += 16) { 200 inet_ntop(AF_INET6, &cp[4 + i], buf, 201 sizeof(buf)); 202 if (i != 0) 203 printf(","); 204 printf("%s", buf); 205 } 206 break; 207 case OT6_STR: 208 memset(&buf, 0, sizeof(buf)); 209 strlcpy(buf, &cp[4], len); 210 printf("%s", buf); 211 break; 212 case OT6_NUM: 213 printf("%d", (u_int32_t)ntohl(*(u_int32_t *)&cp[4])); 214 break; 215 default: 216 for (i = 0; i < len; i++) 217 printf("%02x", cp[4 + i] & 0xff); 218 } 219 printf(")"); 220 cp += len + 4; 221 } 222 return; 223 224 trunc: 225 printf("[|dhcp6ext]"); 226 } 227 228 /* 229 * Print dhcp6 requests 230 */ 231 void 232 dhcp6_print(register const u_char *cp, u_int length, 233 u_short sport, u_short dport) 234 { 235 union dhcp6 *dh6; 236 u_char *ep; 237 u_char *extp; 238 239 printf("dhcp6"); 240 241 ep = (u_char *)snapend; 242 243 dh6 = (union dhcp6 *)cp; 244 TCHECK(dh6->dh6_msgtype); 245 switch (dh6->dh6_msgtype) { 246 case DH6_SOLICIT: 247 if (vflag && TTEST(dh6->dh6_sol.dh6sol_relayaddr)) { 248 printf(" solicit("); 249 if ((dh6->dh6_sol.dh6sol_flags & DH6SOL_CLOSE) != 0) 250 printf("C"); 251 if (dh6->dh6_sol.dh6sol_flags != 0) 252 printf(" "); 253 printf("cliaddr=%s", 254 ip6addr_string(&dh6->dh6_sol.dh6sol_cliaddr)); 255 printf(" relayaddr=%s", 256 ip6addr_string(&dh6->dh6_sol.dh6sol_relayaddr)); 257 printf(")"); 258 } else 259 printf(" solicit"); 260 break; 261 case DH6_ADVERT: 262 if (!(vflag && TTEST(dh6->dh6_adv.dh6adv_serveraddr))) { 263 printf(" advert"); 264 break; 265 } 266 printf(" advert("); 267 if ((dh6->dh6_adv.dh6adv_flags & DH6ADV_SERVPRESENT) != 0) 268 printf("S"); 269 if (dh6->dh6_adv.dh6adv_flags != 0) 270 printf(" "); 271 printf("pref=%u", dh6->dh6_adv.dh6adv_pref); 272 printf(" cliaddr=%s", 273 ip6addr_string(&dh6->dh6_adv.dh6adv_cliaddr)); 274 printf(" relayaddr=%s", 275 ip6addr_string(&dh6->dh6_adv.dh6adv_relayaddr)); 276 printf(" servaddr=%s", 277 ip6addr_string(&dh6->dh6_adv.dh6adv_serveraddr)); 278 extp = (u_char *)((&dh6->dh6_adv) + 1); 279 dhcp6ext_print(extp, ep); 280 printf(")"); 281 break; 282 case DH6_REQUEST: 283 if (!(vflag && TTEST(dh6->dh6_req.dh6req_relayaddr))) { 284 printf(" request"); 285 break; 286 } 287 printf(" request("); 288 if ((dh6->dh6_req.dh6req_flags & DH6REQ_CLOSE) != 0) 289 printf("C"); 290 if ((dh6->dh6_req.dh6req_flags & DH6REQ_SERVPRESENT) != 0) 291 printf("S"); 292 if ((dh6->dh6_req.dh6req_flags & DH6REQ_REBOOT) != 0) 293 printf("R"); 294 if (dh6->dh6_req.dh6req_flags != 0) 295 printf(" "); 296 printf("xid=0x%04x", dh6->dh6_req.dh6req_xid); 297 printf(" cliaddr=%s", 298 ip6addr_string(&dh6->dh6_req.dh6req_cliaddr)); 299 printf(" relayaddr=%s", 300 ip6addr_string(&dh6->dh6_req.dh6req_relayaddr)); 301 extp = (char *)((&dh6->dh6_req) + 1); 302 if ((dh6->dh6_req.dh6req_flags & DH6REQ_SERVPRESENT) != 0) { 303 printf(" servaddr=%s", ip6addr_string(extp)); 304 extp += 16; 305 } 306 dhcp6ext_print(extp, ep); 307 printf(")"); 308 break; 309 case DH6_REPLY: 310 if (!(vflag && TTEST(dh6->dh6_rep.dh6rep_xid))) { 311 printf(" reply"); 312 break; 313 } 314 printf(" reply("); 315 if ((dh6->dh6_rep.dh6rep_flagandstat & DH6REP_CLIPRESENT) != 0) 316 printf("C"); 317 if (dh6->dh6_rep.dh6rep_flagandstat != 0) 318 printf(" "); 319 printf("stat=0x%02x", 320 dh6->dh6_rep.dh6rep_flagandstat & DH6REP_STATMASK); 321 extp = (u_char *)((&dh6->dh6_rep) + 1); 322 if ((dh6->dh6_rep.dh6rep_flagandstat & DH6REP_CLIPRESENT) != 0) { 323 printf(" cliaddr=%s", ip6addr_string(extp)); 324 extp += 16; 325 } 326 dhcp6ext_print(extp, ep); 327 printf(")"); 328 break; 329 case DH6_RELEASE: 330 printf(" release"); 331 break; 332 case DH6_RECONFIG: 333 printf(" reconfig"); 334 break; 335 } 336 return; 337 338 trunc: 339 printf("%s", tstr); 340 } 341 342 #endif /* INET6 */ 343