1 /* $OpenBSD: print-dhcp6.c,v 1.7 2009/10/27 23:59:55 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 #ifdef INET6 33 34 #include <sys/param.h> 35 #include <sys/time.h> 36 #include <sys/socket.h> 37 38 struct mbuf; 39 struct rtentry; 40 #include <net/if.h> 41 42 #include <netinet/in.h> 43 44 #include <ctype.h> 45 #ifdef HAVE_MEMORY_H 46 #include <memory.h> 47 #endif 48 #include <stdio.h> 49 #include <string.h> 50 #include <arpa/inet.h> 51 52 #include "interface.h" 53 #include "addrtoname.h" 54 #include "dhcp6.h" 55 #include "dhcp6opt.h" 56 57 #if 0 58 static void dhcp6opttab_init(void); 59 static struct dhcp6_opt *dhcp6opttab_byname(char *); 60 #endif 61 static struct dhcp6_opt *dhcp6opttab_bycode(u_int); 62 63 static char tstr[] = " [|dhcp6]"; 64 65 static struct dhcp6_opt dh6opttab[] = { 66 /* IP Address Extension */ 67 { 1, OL6_N, "IP Address", OT6_NONE, }, 68 69 /* General Extension */ 70 { 2, 4, "Time Offset", OT6_NUM, }, 71 { 3, OL6_N, "IEEE 1003.1 POSIX Timezone", OT6_STR, }, 72 { 6, OL6_16N, "Domain Name Server", OT6_V6, }, 73 { 10, OL6_N, "Domain Name", OT6_STR, }, 74 75 /* Application and Service Parameters */ 76 { 16, OL6_N, "Directory Agent", OT6_NONE, }, 77 { 17, OL6_N, "Service Scope" , OT6_NONE, }, 78 { 18, OL6_16N, "Network Time Protocol Servers", OT6_V6, }, 79 { 19, OL6_N, "NIS Domain", OT6_STR, }, 80 { 20, OL6_16N, "NIS Servers", OT6_V6, }, 81 { 21, OL6_N, "NIS+ Domain", OT6_STR, }, 82 { 22, OL6_16N, "NIS+ Servers", OT6_V6, }, 83 84 /* TCP Parameters */ 85 { 32, 4, "TCP Keepalive Interval", OT6_NUM, }, 86 87 /* DHCPv6 Extensions */ 88 { 40, 4, "Maximum DHCPv6 Message Size", OT6_NUM, }, 89 { 41, OL6_N, "DHCP Retransmission and Configuration Parameter", 90 OT6_NONE, }, 91 { 48, OL6_N, "Platform Specific Information", OT6_NONE, }, 92 { 49, OL6_N, "Platform Class Identifier", OT6_STR, }, 93 { 64, OL6_N, "Class Identifier", OT6_STR, }, 94 { 66, 16, "Reconfigure Multicast Address", OT6_V6, }, 95 { 67, 16, "Renumber DHCPv6 Server Address", 96 OT6_V6, }, 97 { 68, OL6_N, "DHCP Relay ICMP Error Message", OT6_NONE, }, 98 { 84, OL6_N, "Client-Server Authentication", OT6_NONE, }, 99 { 85, 4, "Client Key Selection", OT6_NUM, }, 100 101 /* End Extension */ 102 { 65536, OL6_Z, "End", OT6_NONE, }, 103 104 { 0 }, 105 }; 106 107 #if 0 108 static struct dhcp6_opt *dh6o_pad; 109 static struct dhcp6_opt *dh6o_end; 110 111 static void 112 dhcp6opttab_init() 113 { 114 dh6o_pad = dhcp6opttab_bycode(0); 115 dh6o_end = dhcp6opttab_bycode(65536); 116 } 117 #endif 118 119 #if 0 120 static struct dhcp6_opt * 121 dhcp6opttab_byname(name) 122 char *name; 123 { 124 struct dhcp6_opt *p; 125 126 for (p = dh6opttab; p->code; p++) 127 if (strcmp(name, p->name) == 0) 128 return p; 129 return NULL; 130 } 131 #endif 132 133 static struct dhcp6_opt * 134 dhcp6opttab_bycode(code) 135 u_int code; 136 { 137 struct dhcp6_opt *p; 138 139 for (p = dh6opttab; p->code; p++) 140 if (p->code == code) 141 return p; 142 return NULL; 143 } 144 145 static void 146 dhcp6ext_print(u_char *cp, u_char *ep) 147 { 148 u_int16_t code, len; 149 struct dhcp6_opt *p; 150 char buf[BUFSIZ]; 151 int i; 152 153 if (cp == ep) 154 return; 155 printf(" "); 156 while (cp < ep) { 157 code = ntohs(*(u_int16_t *)&cp[0]); 158 if (code != 65535) 159 len = ntohs(*(u_int16_t *)&cp[2]); 160 else 161 len = 0; 162 p = dhcp6opttab_bycode(code); 163 if (p == NULL) { 164 printf("(unknown, len=%d)", len); 165 cp += len + 4; 166 continue; 167 } 168 169 /* sanity check on length */ 170 switch (p->len) { 171 case OL6_N: 172 break; 173 case OL6_16N: 174 if (len % 16 != 0) 175 goto trunc; 176 break; 177 case OL6_Z: 178 if (len != 0) 179 goto trunc; 180 break; 181 default: 182 if (len != p->len) 183 goto trunc; 184 break; 185 } 186 if (cp + 4 + len > ep) { 187 printf("[|%s]", p->name); 188 return; 189 } 190 191 printf("(%s, ", p->name); 192 switch (p->type) { 193 case OT6_V6: 194 for (i = 0; i < len; i += 16) { 195 inet_ntop(AF_INET6, &cp[4 + i], buf, 196 sizeof(buf)); 197 if (i != 0) 198 printf(","); 199 printf("%s", buf); 200 } 201 break; 202 case OT6_STR: 203 memset(&buf, 0, sizeof(buf)); 204 strlcpy(buf, &cp[4], len); 205 printf("%s", buf); 206 break; 207 case OT6_NUM: 208 printf("%d", (u_int32_t)ntohl(*(u_int32_t *)&cp[4])); 209 break; 210 default: 211 for (i = 0; i < len; i++) 212 printf("%02x", cp[4 + i] & 0xff); 213 } 214 printf(")"); 215 cp += len + 4; 216 } 217 return; 218 219 trunc: 220 printf("[|dhcp6ext]"); 221 } 222 223 /* 224 * Print dhcp6 requests 225 */ 226 void 227 dhcp6_print(register const u_char *cp, u_int length, 228 u_short sport, u_short dport) 229 { 230 union dhcp6 *dh6; 231 u_char *ep; 232 u_char *extp; 233 234 printf("dhcp6"); 235 236 ep = (u_char *)snapend; 237 238 dh6 = (union dhcp6 *)cp; 239 TCHECK(dh6->dh6_msgtype); 240 switch (dh6->dh6_msgtype) { 241 case DH6_SOLICIT: 242 if (vflag && TTEST(dh6->dh6_sol.dh6sol_relayaddr)) { 243 printf(" solicit("); 244 if ((dh6->dh6_sol.dh6sol_flags & DH6SOL_CLOSE) != 0) 245 printf("C"); 246 if (dh6->dh6_sol.dh6sol_flags != 0) 247 printf(" "); 248 printf("cliaddr=%s", 249 ip6addr_string(&dh6->dh6_sol.dh6sol_cliaddr)); 250 printf(" relayaddr=%s", 251 ip6addr_string(&dh6->dh6_sol.dh6sol_relayaddr)); 252 printf(")"); 253 } else 254 printf(" solicit"); 255 break; 256 case DH6_ADVERT: 257 if (!(vflag && TTEST(dh6->dh6_adv.dh6adv_serveraddr))) { 258 printf(" advert"); 259 break; 260 } 261 printf(" advert("); 262 if ((dh6->dh6_adv.dh6adv_flags & DH6ADV_SERVPRESENT) != 0) 263 printf("S"); 264 if (dh6->dh6_adv.dh6adv_flags != 0) 265 printf(" "); 266 printf("pref=%u", dh6->dh6_adv.dh6adv_pref); 267 printf(" cliaddr=%s", 268 ip6addr_string(&dh6->dh6_adv.dh6adv_cliaddr)); 269 printf(" relayaddr=%s", 270 ip6addr_string(&dh6->dh6_adv.dh6adv_relayaddr)); 271 printf(" servaddr=%s", 272 ip6addr_string(&dh6->dh6_adv.dh6adv_serveraddr)); 273 extp = (u_char *)((&dh6->dh6_adv) + 1); 274 dhcp6ext_print(extp, ep); 275 printf(")"); 276 break; 277 case DH6_REQUEST: 278 if (!(vflag && TTEST(dh6->dh6_req.dh6req_relayaddr))) { 279 printf(" request"); 280 break; 281 } 282 printf(" request("); 283 if ((dh6->dh6_req.dh6req_flags & DH6REQ_CLOSE) != 0) 284 printf("C"); 285 if ((dh6->dh6_req.dh6req_flags & DH6REQ_SERVPRESENT) != 0) 286 printf("S"); 287 if ((dh6->dh6_req.dh6req_flags & DH6REQ_REBOOT) != 0) 288 printf("R"); 289 if (dh6->dh6_req.dh6req_flags != 0) 290 printf(" "); 291 printf("xid=0x%04x", dh6->dh6_req.dh6req_xid); 292 printf(" cliaddr=%s", 293 ip6addr_string(&dh6->dh6_req.dh6req_cliaddr)); 294 printf(" relayaddr=%s", 295 ip6addr_string(&dh6->dh6_req.dh6req_relayaddr)); 296 extp = (char *)((&dh6->dh6_req) + 1); 297 if ((dh6->dh6_req.dh6req_flags & DH6REQ_SERVPRESENT) != 0) { 298 printf(" servaddr=%s", ip6addr_string(extp)); 299 extp += 16; 300 } 301 dhcp6ext_print(extp, ep); 302 printf(")"); 303 break; 304 case DH6_REPLY: 305 if (!(vflag && TTEST(dh6->dh6_rep.dh6rep_xid))) { 306 printf(" reply"); 307 break; 308 } 309 printf(" reply("); 310 if ((dh6->dh6_rep.dh6rep_flagandstat & DH6REP_CLIPRESENT) != 0) 311 printf("C"); 312 if (dh6->dh6_rep.dh6rep_flagandstat != 0) 313 printf(" "); 314 printf("stat=0x%02x", 315 dh6->dh6_rep.dh6rep_flagandstat & DH6REP_STATMASK); 316 extp = (u_char *)((&dh6->dh6_rep) + 1); 317 if ((dh6->dh6_rep.dh6rep_flagandstat & DH6REP_CLIPRESENT) != 0) { 318 printf(" cliaddr=%s", ip6addr_string(extp)); 319 extp += 16; 320 } 321 dhcp6ext_print(extp, ep); 322 printf(")"); 323 break; 324 case DH6_RELEASE: 325 printf(" release"); 326 break; 327 case DH6_RECONFIG: 328 printf(" reconfig"); 329 break; 330 } 331 return; 332 333 trunc: 334 printf("%s", tstr); 335 } 336 337 #endif /* INET6 */ 338