diff options
Diffstat (limited to 'contrib/tcpdump/print-dhcp6.c')
-rw-r--r-- | contrib/tcpdump/print-dhcp6.c | 342 |
1 files changed, 342 insertions, 0 deletions
diff --git a/contrib/tcpdump/print-dhcp6.c b/contrib/tcpdump/print-dhcp6.c new file mode 100644 index 0000000..411f166 --- /dev/null +++ b/contrib/tcpdump/print-dhcp6.c @@ -0,0 +1,342 @@ +/* + * Copyright (C) 1998 and 1999 WIDE Project. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the project nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static const char rcsid[] = + "@(#) $Header: /tcpdump/master/tcpdump/print-dhcp6.c,v 1.3 1999/12/22 06:27:20 itojun Exp $"; +#endif + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <sys/param.h> +#include <sys/time.h> +#include <sys/socket.h> + +#if __STDC__ +struct mbuf; +struct rtentry; +#endif +#include <net/if.h> + +#include <netinet/in.h> + +#include <ctype.h> +#ifdef HAVE_MEMORY_H +#include <memory.h> +#endif +#include <stdio.h> +#include <string.h> +#include <arpa/inet.h> + +#include "interface.h" +#include "addrtoname.h" +#include "dhcp6.h" +#include "dhcp6opt.h" + +#if 0 +static void dhcp6opttab_init __P((void)); +static struct dhcp6_opt *dhcp6opttab_byname __P((char *)); +#endif +static struct dhcp6_opt *dhcp6opttab_bycode __P((u_int)); + +static char tstr[] = " [|dhcp6]"; + +static struct dhcp6_opt dh6opttab[] = { + /* IP Address Extension */ + { 1, OL6_N, "IP Address", OT6_NONE, }, + + /* General Extension */ + { 2, 4, "Time Offset", OT6_NUM, }, + { 3, OL6_N, "IEEE 1003.1 POSIX Timezone", OT6_STR, }, + { 6, OL6_16N, "Domain Name Server", OT6_V6, }, + { 10, OL6_N, "Domain Name", OT6_STR, }, + + /* Application and Service Parameters */ + { 16, OL6_N, "Directory Agent", OT6_NONE, }, + { 17, OL6_N, "Service Scope" , OT6_NONE, }, + { 18, OL6_16N, "Network Time Protocol Servers", OT6_V6, }, + { 19, OL6_N, "NIS Domain", OT6_STR, }, + { 20, OL6_16N, "NIS Servers", OT6_V6, }, + { 21, OL6_N, "NIS+ Domain", OT6_STR, }, + { 22, OL6_16N, "NIS+ Servers", OT6_V6, }, + + /* TCP Parameters */ + { 32, 4, "TCP Keepalive Interval", OT6_NUM, }, + + /* DHCPv6 Extensions */ + { 40, 4, "Maximum DHCPv6 Message Size", OT6_NUM, }, + { 41, OL6_N, "DHCP Retransmission and Configuration Parameter", + OT6_NONE, }, + { 48, OL6_N, "Platform Specific Information", OT6_NONE, }, + { 49, OL6_N, "Platform Class Identifier", OT6_STR, }, + { 64, OL6_N, "Class Identifier", OT6_STR, }, + { 66, 16, "Reconfigure Multicast Address", OT6_V6, }, + { 67, 16, "Renumber DHCPv6 Server Address", + OT6_V6, }, + { 68, OL6_N, "DHCP Relay ICMP Error Message", OT6_NONE, }, + { 84, OL6_N, "Client-Server Authentication", OT6_NONE, }, + { 85, 4, "Client Key Selection", OT6_NUM, }, + + /* End Extension */ + { 65536, OL6_Z, "End", OT6_NONE, }, + + { 0 }, +}; + +#if 0 +static struct dhcp6_opt *dh6o_pad; +static struct dhcp6_opt *dh6o_end; + +static void +dhcp6opttab_init() +{ + dh6o_pad = dhcp6opttab_bycode(0); + dh6o_end = dhcp6opttab_bycode(65536); +} +#endif + +#if 0 +static struct dhcp6_opt * +dhcp6opttab_byname(name) + char *name; +{ + struct dhcp6_opt *p; + + for (p = dh6opttab; p->code; p++) + if (strcmp(name, p->name) == 0) + return p; + return NULL; +} +#endif + +static struct dhcp6_opt * +dhcp6opttab_bycode(code) + u_int code; +{ + struct dhcp6_opt *p; + + for (p = dh6opttab; p->code; p++) + if (p->code == code) + return p; + return NULL; +} + +static void +dhcp6ext_print(u_char *cp, u_char *ep) +{ + u_int16_t code, len; + struct dhcp6_opt *p; + char buf[BUFSIZ]; + int i; + + if (cp == ep) + return; + printf(" "); + while (cp < ep) { + code = ntohs(*(u_int16_t *)&cp[0]); + if (code != 65535) + len = ntohs(*(u_int16_t *)&cp[2]); + else + len = 0; + p = dhcp6opttab_bycode(code); + if (p == NULL) { + printf("(unknown, len=%d)", len); + cp += len + 4; + continue; + } + + /* sanity check on length */ + switch (p->len) { + case OL6_N: + break; + case OL6_16N: + if (len % 16 != 0) + goto trunc; + break; + case OL6_Z: + if (len != 0) + goto trunc; + break; + default: + if (len != p->len) + goto trunc; + break; + } + if (cp + 4 + len > ep) { + printf("[|%s]", p->name); + return; + } + + printf("(%s, ", p->name); + switch (p->type) { + case OT6_V6: + for (i = 0; i < len; i += 16) { + inet_ntop(AF_INET6, &cp[4 + i], buf, + sizeof(buf)); + if (i != 0) + printf(","); + printf("%s", buf); + } + break; + case OT6_STR: + memset(&buf, 0, sizeof(buf)); + strncpy(buf, &cp[4], len); + printf("%s", buf); + break; + case OT6_NUM: + printf("%d", (u_int32_t)ntohl(*(u_int32_t *)&cp[4])); + break; + default: + for (i = 0; i < len; i++) + printf("%02x", cp[4 + i] & 0xff); + } + printf(")"); + cp += len + 4; + } + return; + +trunc: + printf("[|dhcp6ext]"); +} + +/* + * Print dhcp6 requests + */ +void +dhcp6_print(register const u_char *cp, u_int length, + u_short sport, u_short dport) +{ + union dhcp6 *dh6; + u_char *ep; + u_char *extp; + + printf("dhcp6"); + + ep = (u_char *)snapend; + + dh6 = (union dhcp6 *)cp; + TCHECK(dh6->dh6_msgtype); + switch (dh6->dh6_msgtype) { + case DH6_SOLICIT: + if (vflag && TTEST(dh6->dh6_sol.dh6sol_relayaddr)) { + printf(" solicit("); + if ((dh6->dh6_sol.dh6sol_flags & DH6SOL_CLOSE) != 0) + printf("C"); + if (dh6->dh6_sol.dh6sol_flags != 0) + printf(" "); + printf("cliaddr=%s", + ip6addr_string(&dh6->dh6_sol.dh6sol_cliaddr)); + printf(" relayaddr=%s", + ip6addr_string(&dh6->dh6_sol.dh6sol_relayaddr)); + printf(")"); + } else + printf(" solicit"); + break; + case DH6_ADVERT: + if (!(vflag && TTEST(dh6->dh6_adv.dh6adv_serveraddr))) { + printf(" advert"); + break; + } + printf(" advert("); + if ((dh6->dh6_adv.dh6adv_flags & DH6ADV_SERVPRESENT) != 0) + printf("S"); + if (dh6->dh6_adv.dh6adv_flags != 0) + printf(" "); + printf("pref=%u", dh6->dh6_adv.dh6adv_pref); + printf(" cliaddr=%s", + ip6addr_string(&dh6->dh6_adv.dh6adv_cliaddr)); + printf(" relayaddr=%s", + ip6addr_string(&dh6->dh6_adv.dh6adv_relayaddr)); + printf(" servaddr=%s", + ip6addr_string(&dh6->dh6_adv.dh6adv_serveraddr)); + extp = (u_char *)((&dh6->dh6_adv) + 1); + dhcp6ext_print(extp, ep); + printf(")"); + break; + case DH6_REQUEST: + if (!(vflag && TTEST(dh6->dh6_req.dh6req_relayaddr))) { + printf(" request"); + break; + } + printf(" request("); + if ((dh6->dh6_req.dh6req_flags & DH6REQ_CLOSE) != 0) + printf("C"); + if ((dh6->dh6_req.dh6req_flags & DH6REQ_SERVPRESENT) != 0) + printf("S"); + if ((dh6->dh6_req.dh6req_flags & DH6REQ_REBOOT) != 0) + printf("R"); + if (dh6->dh6_req.dh6req_flags != 0) + printf(" "); + printf("xid=0x%04x", dh6->dh6_req.dh6req_xid); + printf(" cliaddr=%s", + ip6addr_string(&dh6->dh6_req.dh6req_cliaddr)); + printf(" relayaddr=%s", + ip6addr_string(&dh6->dh6_req.dh6req_relayaddr)); + extp = (char *)((&dh6->dh6_req) + 1); + if ((dh6->dh6_req.dh6req_flags & DH6REQ_SERVPRESENT) != 0) { + printf(" servaddr=%s", ip6addr_string(extp)); + extp += 16; + } + dhcp6ext_print(extp, ep); + printf(")"); + break; + case DH6_REPLY: + if (!(vflag && TTEST(dh6->dh6_rep.dh6rep_xid))) { + printf(" reply"); + break; + } + printf(" reply("); + if ((dh6->dh6_rep.dh6rep_flagandstat & DH6REP_CLIPRESENT) != 0) + printf("C"); + if (dh6->dh6_rep.dh6rep_flagandstat != 0) + printf(" "); + printf("stat=0x%02x", + dh6->dh6_rep.dh6rep_flagandstat & DH6REP_STATMASK); + extp = (u_char *)((&dh6->dh6_rep) + 1); + if ((dh6->dh6_rep.dh6rep_flagandstat & DH6REP_CLIPRESENT) != 0) { + printf(" cliaddr=%s", ip6addr_string(extp)); + extp += 16; + } + dhcp6ext_print(extp, ep); + printf(")"); + break; + case DH6_RELEASE: + printf(" release"); + break; + case DH6_RECONFIG: + printf(" reconfig"); + break; + } + return; + +trunc: + printf("%s", tstr); +} |