The Tcpdump Group git mirrors - tcpdump/blobdiff

* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

*/

* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

*/

-#ifndef lint

-static const char rcsid[] =

- "@(#) $Header: /tcpdump/master/tcpdump/print-ip6.c,v 1.20 2001-11-15 07:51:09 itojun Exp $";

-#endif

-

#ifdef HAVE_CONFIG_H

#include "config.h"

#endif

#ifdef HAVE_CONFIG_H

#include "config.h"

#endif

-#ifdef INET6

-

-#include <sys/param.h>

-#include <sys/time.h>

-#include <sys/types.h>

-#include <sys/socket.h>

-

-#include <netinet/in.h>

+#include <netdissect-stdinc.h>

-#include <stdio.h>

-#include <stdlib.h>

-#include <unistd.h>

#include <string.h>

-#include "interface.h"

+#include "netdissect.h"

#include "addrtoname.h"

+#include "extract.h"

#include "ip6.h"

+#include "ipproto.h"

+

+/*

+ * Compute a V6-style checksum by building a pseudoheader.

+ */

+int

+nextproto6_cksum(const struct ip6_hdr *ip6, const uint8_t *data,

+ u_int len, u_int covlen, u_int next_proto)

+{

+ struct {

+ struct in6_addr ph_src;

+ struct in6_addr ph_dst;

+ uint32_t ph_len;

+ uint8_t ph_zero[3];

+ uint8_t ph_nxt;

+ } ph;

+ struct cksum_vec vec[2];

+

+ /* pseudo-header */

+ memset(&ph, 0, sizeof(ph));

+ UNALIGNED_MEMCPY(&ph.ph_src, &ip6->ip6_src, sizeof (struct in6_addr));

+ UNALIGNED_MEMCPY(&ph.ph_dst, &ip6->ip6_dst, sizeof (struct in6_addr));

+ ph.ph_len = htonl(len);

+ ph.ph_nxt = next_proto;

+

+ vec[0].ptr = (const uint8_t *)(void *)&ph;

+ vec[0].len = sizeof(ph);

+ vec[1].ptr = data;

+ vec[1].len = covlen;

+

+ return in_cksum(vec, 2);

+}

/*

* print an IP6 datagram.

*/

void

/*

* print an IP6 datagram.

*/

void

-ip6_print(register const u_char *bp, register u_int length)

+ip6_print(netdissect_options *ndo, const u_char *bp, u_int length)

{

register const struct ip6_hdr *ip6;

register int advance;

{

register const struct ip6_hdr *ip6;

register int advance;

- register u_int len;

+ u_int len;

+ const u_char *ipend;

register const u_char *cp;

+ register u_int payload_len;

int nh;

int fragmented = 0;

u_int flow;

int nh;

int fragmented = 0;

u_int flow;

-

- ip6 = (const struct ip6_hdr *)bp;

-#ifdef LBL_ALIGN

- /*

- * The IP6 header is not 16-byte aligned, so copy into abuf.

- * This will never happen with BPF. It does happen raw packet

- * dumps from -r.

- */

- if ((u_long)ip6 & 15) {

- static u_char *abuf;

+ ip6 = (const struct ip6_hdr *)bp;

- if (abuf == NULL) {

- abuf = malloc(snaplen);

- if (abuf == NULL)

- error("ip6_print: malloc");

- }

- memcpy(abuf, ip6, min(length, snaplen));

- snapend += abuf - (u_char *)ip6;

- packetp = abuf;

- ip6 = (struct ip6_hdr *)abuf;

- bp = abuf;

- }

-#endif

- TCHECK(*ip6);

+ ND_TCHECK(*ip6);

if (length < sizeof (struct ip6_hdr)) {

- (void)printf("truncated-ip6 %d", length);

+ ND_PRINT((ndo, "truncated-ip6 %u", length));

return;

}

return;

}

- advance = sizeof(struct ip6_hdr);

- len = ntohs(ip6->ip6_plen);

- if (length < len + advance)

- (void)printf("truncated-ip6 - %d bytes missing!",

- len + advance - length);

+ if (!ndo->ndo_eflag)

+ ND_PRINT((ndo, "IP6 "));

+

+ if (IP6_VERSION(ip6) != 6) {

+ ND_PRINT((ndo,"version error: %u != 6", IP6_VERSION(ip6)));

+ return;

+ }

+

+ payload_len = EXTRACT_16BITS(&ip6->ip6_plen);

+ len = payload_len + sizeof(struct ip6_hdr);

+ if (length < len)

+ ND_PRINT((ndo, "truncated-ip6 - %u bytes missing!",

+ len - length));

+

+ if (ndo->ndo_vflag) {

+ flow = EXTRACT_32BITS(&ip6->ip6_flow);

+ ND_PRINT((ndo, "("));

+#if 0

+ /* rfc1883 */

+ if (flow & 0x0f000000)

+ ND_PRINT((ndo, "pri 0x%02x, ", (flow & 0x0f000000) >> 24));

+ if (flow & 0x00ffffff)

+ ND_PRINT((ndo, "flowlabel 0x%06x, ", flow & 0x00ffffff));

+#else

+ /* RFC 2460 */

+ if (flow & 0x0ff00000)

+ ND_PRINT((ndo, "class 0x%02x, ", (flow & 0x0ff00000) >> 20));

+ if (flow & 0x000fffff)

+ ND_PRINT((ndo, "flowlabel 0x%05x, ", flow & 0x000fffff));

+#endif

+

+ ND_PRINT((ndo, "hlim %u, next-header %s (%u) payload length: %u) ",

+ ip6->ip6_hlim,

+ tok2str(ipproto_values,"unknown",ip6->ip6_nxt),

+ ip6->ip6_nxt,

+ payload_len));

+ }

+

+ /*

+ * Cut off the snapshot length to the end of the IP payload.

+ */

+ ipend = bp + len;

+ if (ipend < ndo->ndo_snapend)

+ ndo->ndo_snapend = ipend;

cp = (const u_char *)ip6;

+ advance = sizeof(struct ip6_hdr);

nh = ip6->ip6_nxt;

- while (cp < snapend) {

+ while (cp < ndo->ndo_snapend && advance > 0) {

cp += advance;

+ len -= advance;

- if (cp == (const u_char *)(ip6 + 1)

- && nh != IPPROTO_TCP && nh != IPPROTO_UDP) {

- (void)printf("%s > %s: ", ip6addr_string(&ip6->ip6_src),

- ip6addr_string(&ip6->ip6_dst));

+ if (cp == (const u_char *)(ip6 + 1) &&

+ nh != IPPROTO_TCP && nh != IPPROTO_UDP &&

+ nh != IPPROTO_DCCP && nh != IPPROTO_SCTP) {

+ ND_PRINT((ndo, "%s > %s: ", ip6addr_string(ndo, &ip6->ip6_src),

+ ip6addr_string(ndo, &ip6->ip6_dst)));

}

switch (nh) {

case IPPROTO_HOPOPTS:

}

switch (nh) {

case IPPROTO_HOPOPTS:

- advance = hbhopt_print(cp);

+ advance = hbhopt_print(ndo, cp);

nh = *cp;

break;

case IPPROTO_DSTOPTS:

nh = *cp;

break;

case IPPROTO_DSTOPTS:

- advance = dstopt_print(cp);

+ advance = dstopt_print(ndo, cp);

nh = *cp;

break;

case IPPROTO_FRAGMENT:

nh = *cp;

break;

case IPPROTO_FRAGMENT:

- advance = frag6_print(cp, (const u_char *)ip6);

- if (snapend <= cp + advance)

- goto end;

+ advance = frag6_print(ndo, cp, (const u_char *)ip6);

+ if (ndo->ndo_snapend <= cp + advance)

+ return;

nh = *cp;

fragmented = 1;

break;

nh = *cp;

fragmented = 1;

break;

+

+ case IPPROTO_MOBILITY_OLD:

+ case IPPROTO_MOBILITY:

+ /*

+ * XXX - we don't use "advance"; the current

+ * "Mobility Support in IPv6" draft

+ * (draft-ietf-mobileip-ipv6-24) says that

+ * the next header field in a mobility header

+ * should be IPPROTO_NONE, but speaks of

+ * the possiblity of a future extension in

+ * which payload can be piggybacked atop a

+ * mobility header.

+ */

+ advance = mobility_print(ndo, cp, (const u_char *)ip6);

+ nh = *cp;

+ return;

case IPPROTO_ROUTING:

- advance = rt6_print(cp, (const u_char *)ip6);

+ advance = rt6_print(ndo, cp, (const u_char *)ip6);

nh = *cp;

break;

nh = *cp;

break;

+ case IPPROTO_SCTP:

+ sctp_print(ndo, cp, (const u_char *)ip6, len);

+ return;

+ case IPPROTO_DCCP:

+ dccp_print(ndo, cp, (const u_char *)ip6, len);

+ return;

case IPPROTO_TCP:

- tcp_print(cp, len + sizeof(struct ip6_hdr) - (cp - bp),

- (const u_char *)ip6, fragmented);

- goto end;

+ tcp_print(ndo, cp, len, (const u_char *)ip6, fragmented);

+ return;

case IPPROTO_UDP:

- udp_print(cp, len + sizeof(struct ip6_hdr) - (cp - bp),

- (const u_char *)ip6, fragmented);

- goto end;

+ udp_print(ndo, cp, len, (const u_char *)ip6, fragmented);

+ return;

case IPPROTO_ICMPV6:

- icmp6_print(cp, (const u_char *)ip6);

- goto end;

+ icmp6_print(ndo, cp, len, (const u_char *)ip6, fragmented);

+ return;

case IPPROTO_AH:

- advance = ah_print(cp, (const u_char *)ip6);

+ advance = ah_print(ndo, cp);

nh = *cp;

break;

case IPPROTO_ESP:

{

int enh, padlen;

nh = *cp;

break;

case IPPROTO_ESP:

{

int enh, padlen;

- advance = esp_print(cp, (const u_char *)ip6, &enh, &padlen);

- if (enh < 0)

- goto end;

+ advance = esp_print(ndo, cp, len, (const u_char *)ip6, &enh, &padlen);

nh = enh & 0xff;

len -= padlen;

break;

}

nh = enh & 0xff;

len -= padlen;

break;

}

-#ifndef IPPROTO_IPCOMP

-#define IPPROTO_IPCOMP 108

-#endif

case IPPROTO_IPCOMP:

{

int enh;

case IPPROTO_IPCOMP:

{

int enh;

- advance = ipcomp_print(cp, (const u_char *)ip6, &enh);

- if (enh < 0)

- goto end;

+ advance = ipcomp_print(ndo, cp, &enh);

nh = enh & 0xff;

break;

}

nh = enh & 0xff;

break;

}

-#ifndef IPPROTO_PIM

-#define IPPROTO_PIM 103

-#endif

case IPPROTO_PIM:

- pim_print(cp, len);

- goto end;

-#ifndef IPPROTO_OSPF

-#define IPPROTO_OSPF 89

-#endif

+ pim_print(ndo, cp, len, (const u_char *)ip6);

+ return;

+

case IPPROTO_OSPF:

- ospf6_print(cp, len);

- goto end;

+ ospf6_print(ndo, cp, len);

+ return;

+

case IPPROTO_IPV6:

- ip6_print(cp, len);

- goto end;

-#ifndef IPPROTO_IPV4

-#define IPPROTO_IPV4 4

-#endif

+ ip6_print(ndo, cp, len);

+ return;

+

case IPPROTO_IPV4:

- ip_print(cp, len);

- goto end;

+ ip_print(ndo, cp, len);

+ return;

+

+ case IPPROTO_PGM:

+ pgm_print(ndo, cp, len, (const u_char *)ip6);

+ return;

+

+ case IPPROTO_GRE:

+ gre_print(ndo, cp, len);

+ return;

+

+ case IPPROTO_RSVP:

+ rsvp_print(ndo, cp, len);

+ return;

+

case IPPROTO_NONE:

- (void)printf("no next header");

- goto end;

+ ND_PRINT((ndo, "no next header"));

+ return;

default:

- (void)printf("ip-proto-%d %d", ip6->ip6_nxt, len);

- goto end;

+ ND_PRINT((ndo, "ip-proto-%d %d", nh, len));

+ return;

}

- end:

-

- flow = ntohl(ip6->ip6_flow);

-#if 0

- /* rfc1883 */

- if (flow & 0x0f000000)

- (void)printf(" [pri 0x%x]", (flow & 0x0f000000) >> 24);

- if (flow & 0x00ffffff)

- (void)printf(" [flowlabel 0x%x]", flow & 0x00ffffff);

-#else

- /* RFC 2460 */

- if (flow & 0x0ff00000)

- (void)printf(" [class 0x%x]", (flow & 0x0ff00000) >> 20);

- if (flow & 0x000fffff)

- (void)printf(" [flowlabel 0x%x]", flow & 0x000fffff);

-#endif

-

- if (ip6->ip6_hlim <= 1)

- (void)printf(" [hlim %d]", (int)ip6->ip6_hlim);

-

- if (vflag) {

- printf(" (");

- (void)printf("len %d", len);

- if (ip6->ip6_hlim > 1)

- (void)printf(", hlim %d", (int)ip6->ip6_hlim);

- printf(")");

- }

return;

trunc:

return;

trunc:

- (void)printf("[|ip6]");

+ ND_PRINT((ndo, "[|ip6]"));

}

-

-#endif /* INET6 */