2 * Copyright (C) 1998 and 1999 WIDE Project.
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6 * modification, are permitted provided that the following conditions
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9 * notice, this list of conditions and the following disclaimer.
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12 * documentation and/or other materials provided with the distribution.
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14 * may be used to endorse or promote products derived from this software
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30 * draft-ietf-dhc-dhcpv6-22.txt
34 static const char rcsid[] =
35 "@(#) $Header: /tcpdump/master/tcpdump/print-dhcp6.c,v 1.14.4.2 2002/06/01 23:51:12 guy Exp $";
42 #include <sys/param.h>
44 #include <sys/socket.h>
46 #include <netinet/in.h>
51 #include <arpa/inet.h>
53 #include "interface.h"
54 #include "addrtoname.h"
57 #define DH6ERR_FAILURE 16
58 #define DH6ERR_AUTHFAIL 17
59 #define DH6ERR_POORLYFORMED 18
60 #define DH6ERR_UNAVAIL 19
61 #define DH6ERR_OPTUNAVAIL 20
65 #define DH6_INFORM_REQ 11
67 /* DHCP6 base packet format */
73 struct in6_addr dh6_servaddr;
75 } __attribute__ ((__packed__));
76 #define dh6_msgtype dh6_msgtypexid.m
77 #define dh6_xid dh6_msgtypexid.x
78 #define DH6_XIDMASK 0x00ffffff
81 #define DH6OPT_DUID 1 /* TBD */
82 #define DH6OPT_DNS 11 /* TBD */
84 u_int16_t dh6opt_type;
86 /* type-dependent data follows */
87 } __attribute__ ((__packed__));
90 dhcp6opt_print(u_char *cp, u_char *ep)
92 struct dhcp6opt *dh6o;
100 if (ep - cp < sizeof(*dh6o))
102 dh6o = (struct dhcp6opt *)cp;
103 optlen = ntohs(dh6o->dh6opt_len);
104 if (ep - cp < sizeof(*dh6o) + optlen)
106 switch (ntohs(dh6o->dh6opt_type)) {
108 printf(" (duid"); /*)*/
114 tp = (u_char *)(dh6o + 1);
115 switch (ntohs(*(u_int16_t *)tp)) {
117 if (optlen >= 2 + 6) {
118 printf(" hwaddr/time time %u type %u ",
119 ntohl(*(u_int32_t *)&tp[2]),
120 ntohs(*(u_int16_t *)&tp[6]));
121 for (i = 8; i < optlen; i++)
122 printf("%02x", tp[i]);
131 if (optlen >= 2 + 8) {
133 for (i = 2; i < 2 + 8; i++)
134 printf("%02x", tp[i]);
143 if (optlen >= 2 + 2) {
144 printf(" hwaddr type %u ",
145 ntohs(*(u_int16_t *)&tp[2]));
146 for (i = 4; i < optlen; i++)
147 printf("%02x", tp[i]);
157 printf(" (dnsserver"); /*)*/
163 tp = (u_char *)(dh6o + 1);
164 for (i = 0; i < optlen; i += 16)
165 printf(" %s", ip6addr_string(&tp[i]));
169 printf(" (opt-%u)", ntohs(dh6o->dh6opt_type));
173 cp += sizeof(*dh6o) + optlen;
178 printf("[|dhcp6ext]");
182 * Print dhcp6 packets
185 dhcp6_print(register const u_char *cp, u_int length,
186 u_int16_t sport, u_int16_t dport)
195 ep = (u_char *)snapend;
197 dh6 = (struct dhcp6 *)cp;
198 TCHECK(dh6->dh6_servaddr);
199 switch (dh6->dh6_msgtype) {
215 printf(" msgtype-%u", dh6->dh6_msgtype);
219 /* XXX relay agent messages have to be handled differently */
222 printf(" %s (", name); /*)*/
224 printf(" msgtype-%u (", dh6->dh6_msgtype); /*)*/
225 printf("xid=%x", ntohl(dh6->dh6_xid) & DH6_XIDMASK);
226 printf(" server=%s", ip6addr_string(&dh6->dh6_servaddr));
227 extp = (u_char *)(dh6 + 1);
228 dhcp6opt_print(extp, ep);