b636d99d91
For now, printing of Sun RPC requests is disabled because we do not yet have the RPC header files. This should affect basically noone, as we do not have any RPC-based programs yet, for the same reason. Change-Id: Ie7818faaaacdc104d8b2c37a68866b4ce18247d6
283 lines
7.3 KiB
C
283 lines
7.3 KiB
C
/*
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* Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that: (1) source code distributions
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* retain the above copyright notice and this paragraph in its entirety, (2)
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* distributions including binary code include the above copyright notice and
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* this paragraph in its entirety in the documentation or other materials
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* provided with the distribution, and (3) all advertising materials mentioning
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* features or use of this software display the following acknowledgement:
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* ``This product includes software developed by the University of California,
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* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
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* the University nor the names of its contributors may be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__RCSID("$NetBSD: print-ip6.c,v 1.5 2015/03/31 21:59:35 christos Exp $");
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#endif
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#define NETDISSECT_REWORKED
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <tcpdump-stdinc.h>
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#include <string.h>
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#include "interface.h"
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#include "addrtoname.h"
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#include "extract.h"
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#ifdef INET6
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#include "ip6.h"
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#include "ipproto.h"
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/*
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* Compute a V6-style checksum by building a pseudoheader.
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*/
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int
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nextproto6_cksum(const struct ip6_hdr *ip6, const uint8_t *data,
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u_int len, u_int covlen, u_int next_proto)
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{
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struct {
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struct in6_addr ph_src;
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struct in6_addr ph_dst;
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uint32_t ph_len;
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uint8_t ph_zero[3];
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uint8_t ph_nxt;
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} ph;
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struct cksum_vec vec[2];
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/* pseudo-header */
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memset(&ph, 0, sizeof(ph));
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UNALIGNED_MEMCPY(&ph.ph_src, &ip6->ip6_src, sizeof (struct in6_addr));
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UNALIGNED_MEMCPY(&ph.ph_dst, &ip6->ip6_dst, sizeof (struct in6_addr));
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ph.ph_len = htonl(len);
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ph.ph_nxt = next_proto;
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vec[0].ptr = (const uint8_t *)(void *)&ph;
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vec[0].len = sizeof(ph);
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vec[1].ptr = data;
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vec[1].len = covlen;
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return in_cksum(vec, 2);
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}
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/*
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* print an IP6 datagram.
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*/
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void
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ip6_print(netdissect_options *ndo, const u_char *bp, u_int length)
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{
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register const struct ip6_hdr *ip6;
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register int advance;
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u_int len;
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const u_char *ipend;
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register const u_char *cp;
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register u_int payload_len;
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int nh;
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int fragmented = 0;
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u_int flow;
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ip6 = (const struct ip6_hdr *)bp;
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ND_TCHECK(*ip6);
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if (length < sizeof (struct ip6_hdr)) {
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ND_PRINT((ndo, "truncated-ip6 %u", length));
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return;
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}
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if (!ndo->ndo_eflag)
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ND_PRINT((ndo, "IP6 "));
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if (IP6_VERSION(ip6) != 6) {
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ND_PRINT((ndo,"version error: %u != 6", IP6_VERSION(ip6)));
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return;
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}
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payload_len = EXTRACT_16BITS(&ip6->ip6_plen);
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len = payload_len + sizeof(struct ip6_hdr);
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if (length < len)
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ND_PRINT((ndo, "truncated-ip6 - %u bytes missing!",
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len - length));
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if (ndo->ndo_vflag) {
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flow = EXTRACT_32BITS(&ip6->ip6_flow);
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ND_PRINT((ndo, "("));
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#if 0
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/* rfc1883 */
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if (flow & 0x0f000000)
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ND_PRINT((ndo, "pri 0x%02x, ", (flow & 0x0f000000) >> 24));
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if (flow & 0x00ffffff)
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ND_PRINT((ndo, "flowlabel 0x%06x, ", flow & 0x00ffffff));
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#else
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/* RFC 2460 */
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if (flow & 0x0ff00000)
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ND_PRINT((ndo, "class 0x%02x, ", (flow & 0x0ff00000) >> 20));
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if (flow & 0x000fffff)
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ND_PRINT((ndo, "flowlabel 0x%05x, ", flow & 0x000fffff));
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#endif
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ND_PRINT((ndo, "hlim %u, next-header %s (%u) payload length: %u) ",
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ip6->ip6_hlim,
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tok2str(ipproto_values,"unknown",ip6->ip6_nxt),
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ip6->ip6_nxt,
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payload_len));
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}
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/*
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* Cut off the snapshot length to the end of the IP payload.
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*/
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ipend = bp + len;
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if (ipend < ndo->ndo_snapend)
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ndo->ndo_snapend = ipend;
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cp = (const u_char *)ip6;
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advance = sizeof(struct ip6_hdr);
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nh = ip6->ip6_nxt;
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while (cp < ndo->ndo_snapend && advance > 0) {
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cp += advance;
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len -= advance;
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if (cp == (const u_char *)(ip6 + 1) &&
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nh != IPPROTO_TCP && nh != IPPROTO_UDP &&
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nh != IPPROTO_DCCP && nh != IPPROTO_SCTP) {
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ND_PRINT((ndo, "%s > %s: ", ip6addr_string(ndo, &ip6->ip6_src),
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ip6addr_string(ndo, &ip6->ip6_dst)));
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}
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switch (nh) {
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case IPPROTO_HOPOPTS:
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advance = hbhopt_print(ndo, cp);
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nh = *cp;
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break;
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case IPPROTO_DSTOPTS:
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advance = dstopt_print(ndo, cp);
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nh = *cp;
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break;
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case IPPROTO_FRAGMENT:
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advance = frag6_print(ndo, cp, (const u_char *)ip6);
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if (ndo->ndo_snapend <= cp + advance)
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return;
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nh = *cp;
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fragmented = 1;
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break;
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case IPPROTO_MOBILITY_OLD:
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case IPPROTO_MOBILITY:
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/*
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* XXX - we don't use "advance"; the current
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* "Mobility Support in IPv6" draft
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* (draft-ietf-mobileip-ipv6-24) says that
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* the next header field in a mobility header
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* should be IPPROTO_NONE, but speaks of
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* the possiblity of a future extension in
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* which payload can be piggybacked atop a
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* mobility header.
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*/
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advance = mobility_print(ndo, cp, (const u_char *)ip6);
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nh = *cp;
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return;
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case IPPROTO_ROUTING:
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advance = rt6_print(ndo, cp, (const u_char *)ip6);
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nh = *cp;
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break;
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case IPPROTO_SCTP:
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sctp_print(ndo, cp, (const u_char *)ip6, len);
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return;
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case IPPROTO_DCCP:
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dccp_print(ndo, cp, (const u_char *)ip6, len);
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return;
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case IPPROTO_TCP:
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tcp_print(ndo, cp, len, (const u_char *)ip6, fragmented);
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return;
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case IPPROTO_UDP:
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udp_print(ndo, cp, len, (const u_char *)ip6, fragmented);
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return;
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case IPPROTO_ICMPV6:
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icmp6_print(ndo, cp, len, (const u_char *)ip6, fragmented);
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return;
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case IPPROTO_AH:
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advance = ah_print(ndo, cp);
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nh = *cp;
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break;
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case IPPROTO_ESP:
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{
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int enh, padlen;
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advance = esp_print(ndo, cp, len, (const u_char *)ip6, &enh, &padlen);
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nh = enh & 0xff;
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len -= padlen;
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break;
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}
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case IPPROTO_IPCOMP:
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{
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int enh;
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advance = ipcomp_print(ndo, cp, &enh);
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nh = enh & 0xff;
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break;
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}
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case IPPROTO_PIM:
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pim_print(ndo, cp, len, nextproto6_cksum(ip6, cp, len, len,
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IPPROTO_PIM));
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return;
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case IPPROTO_OSPF:
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ospf6_print(ndo, cp, len);
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return;
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case IPPROTO_IPV6:
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ip6_print(ndo, cp, len);
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return;
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case IPPROTO_IPV4:
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ip_print(ndo, cp, len);
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return;
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case IPPROTO_PGM:
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pgm_print(ndo, cp, len, (const u_char *)ip6);
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return;
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case IPPROTO_GRE:
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gre_print(ndo, cp, len);
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return;
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case IPPROTO_RSVP:
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rsvp_print(ndo, cp, len);
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return;
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case IPPROTO_NONE:
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ND_PRINT((ndo, "no next header"));
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return;
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default:
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ND_PRINT((ndo, "ip-proto-%d %d", nh, len));
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return;
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}
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}
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return;
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trunc:
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ND_PRINT((ndo, "[|ip6]"));
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}
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#else /* INET6 */
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void
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ip6_print(netdissect_options *ndo, const u_char *bp _U_, u_int length)
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{
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ND_PRINT((ndo, "IP6, length: %u (printing not supported)", length));
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}
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#endif /* INET6 */
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