| /* |
| * 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 1.8 2000-05-17 05:00:12 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 */ |
| { 8193, OL6_N, "IEEE 1003.1 POSIX Timezone", OT6_STR, }, |
| { 8194, OL6_16N, "Domain Name Server", OT6_V6, }, |
| { 8195, OL6_N, "Domain Name", OT6_STR, }, |
| |
| { 8196, OL6_N, "SLP Agent", OT6_NONE, }, |
| { 8197, OL6_N, "SLP Scope" , OT6_NONE, }, |
| { 8198, OL6_16N, "Network Time Protocol Servers", OT6_V6, }, |
| { 8199, OL6_N, "NIS Domain", OT6_STR, }, |
| { 8200, OL6_16N, "NIS Servers", OT6_V6, }, |
| { 8201, OL6_N, "NIS+ Domain", OT6_STR, }, |
| { 8202, OL6_16N, "NIS+ Servers", OT6_V6, }, |
| |
| /* TCP Parameters */ |
| { 8203, 4, "TCP Keepalive Interval", OT6_NUM, }, |
| |
| /* DHCPv6 Extensions */ |
| { 8204, 4, "Maximum DHCPv6 Message Size", OT6_NUM, }, |
| { 8205, OL6_N, "DHCP Retransmission and Configuration Parameter", |
| OT6_NONE, }, |
| { 8206, OL6_N, "Extension Request", OT6_NONE, }, |
| { 8207, OL6_N, "Subnet Prefix", OT6_NONE, }, |
| { 8208, OL6_N, "Platform Specific Information", OT6_NONE, }, |
| { 8209, OL6_N, "Platform Class Identifier", OT6_STR, }, |
| { 8210, OL6_N, "Class Identifier", OT6_STR, }, |
| { 8211, 16, "Reconfigure Multicast Address", OT6_V6, }, |
| { 8212, 16, "Renumber DHCPv6 Server Address", |
| OT6_V6, }, |
| { 8213, OL6_N, "Client-Server Authentication", OT6_NONE, }, |
| { 8214, 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) { |
| if (ep - cp < sizeof(u_int16_t)) |
| break; |
| code = ntohs(*(u_int16_t *)&cp[0]); |
| if (ep - cp < sizeof(u_int16_t) * 2) |
| break; |
| if (code != 65535) |
| len = ntohs(*(u_int16_t *)&cp[2]); |
| else |
| len = 0; |
| if (ep - cp < len + 4) |
| break; |
| 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_int16_t sport, u_int16_t dport) |
| { |
| union dhcp6 *dh6; |
| u_char *ep; |
| u_char *extp; |
| u_int16_t field16; |
| |
| 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"); |
| break; |
| } |
| |
| printf(" solicit("); /*)*/ |
| if (dh6->dh6_sol.dh6sol_flags != 0) { |
| u_int8_t f = dh6->dh6_sol.dh6sol_flags; |
| printf("%s%s ", |
| (f & DH6SOL_PREFIX) ? "P" : "", |
| (f & DH6SOL_CLOSE) ? "C" : ""); |
| } |
| |
| memcpy(&field16, &dh6->dh6_sol.dh6sol_plen_id, |
| sizeof(field16)); |
| field16 = ntohs(field16); |
| if (field16 & ~DH6SOL_SOLICIT_PLEN_MASK) |
| printf("plen=%d ", DH6SOL_SOLICIT_PLEN(field16)); |
| printf("solicit-ID=%d", DH6SOL_SOLICIT_ID(field16)); |
| |
| printf(" cliaddr=%s", |
| ip6addr_string(&dh6->dh6_sol.dh6sol_cliaddr)); |
| printf(" relayaddr=%s", |
| ip6addr_string(&dh6->dh6_sol.dh6sol_relayaddr)); |
| /*(*/ |
| printf(")"); |
| break; |
| case DH6_ADVERT: |
| if (!(vflag && TTEST(dh6->dh6_adv.dh6adv_serveraddr))) { |
| printf(" advert"); |
| break; |
| } |
| printf(" advert("); /*)*/ |
| memcpy(&field16, &dh6->dh6_adv.dh6adv_rsv_id, sizeof(field16)); |
| printf("solicit-ID=%d", |
| ntohs(field16) & DH6SOL_SOLICIT_ID_MASK); |
| 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 != 0) { |
| u_int8_t f = dh6->dh6_req.dh6req_flags; |
| printf("%s%s ", |
| (f & DH6REQ_CLOSE) ? "C" : "", |
| (f & DH6REQ_REBOOT) ? "R" : ""); |
| } |
| 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)); |
| printf(" servaddr=%s", |
| ip6addr_string(&dh6->dh6_req.dh6req_serveraddr)); |
| dhcp6ext_print((char *)(&dh6->dh6_req + 1), 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_RELAYPRESENT) != 0) |
| printf("R "); |
| printf("stat=0x%02x", |
| dh6->dh6_rep.dh6rep_flagandstat & DH6REP_STATMASK); |
| printf(" xid=0x%04x", dh6->dh6_rep.dh6rep_xid); |
| printf(" cliaddr=%s", |
| ip6addr_string(&dh6->dh6_rep.dh6rep_cliaddr)); |
| extp = (u_char *)((&dh6->dh6_rep) + 1); |
| if ((dh6->dh6_rep.dh6rep_flagandstat & DH6REP_RELAYPRESENT) != |
| 0) { |
| printf(" relayaddr=%s", ip6addr_string(extp)); |
| extp += sizeof(struct in6_addr); |
| } |
| dhcp6ext_print(extp, ep); |
| /*(*/ |
| printf(")"); |
| break; |
| case DH6_RELEASE: |
| printf(" release"); |
| break; |
| case DH6_RECONFIG: |
| printf(" reconfig"); |
| break; |
| } |
| return; |
| |
| trunc: |
| printf("%s", tstr); |
| } |