| /* |
| * Copyright (c) 1988, 1989, 1990, 1991, 1993, 1994 |
| * The Regents of the University of California. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that: (1) source code distributions |
| * retain the above copyright notice and this paragraph in its entirety, (2) |
| * distributions including binary code include the above copyright notice and |
| * this paragraph in its entirety in the documentation or other materials |
| * provided with the distribution, and (3) all advertising materials mentioning |
| * features or use of this software display the following acknowledgement: |
| * ``This product includes software developed by the University of California, |
| * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of |
| * the University 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED |
| * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
| */ |
| |
| /* \summary: IPv6 routing header printer */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include <config.h> |
| #endif |
| |
| #include "netdissect-stdinc.h" |
| |
| #include <string.h> |
| |
| #include "netdissect.h" |
| #include "addrtoname.h" |
| #include "extract.h" |
| |
| #include "ip6.h" |
| |
| int |
| rt6_print(netdissect_options *ndo, const u_char *bp, const u_char *bp2 _U_) |
| { |
| const struct ip6_rthdr *dp; |
| const struct ip6_rthdr0 *dp0; |
| const struct ip6_srh *srh; |
| u_int i, len, type; |
| const u_char *p; |
| |
| ndo->ndo_protocol = "rt6"; |
| dp = (const struct ip6_rthdr *)bp; |
| |
| ND_TCHECK_1(dp->ip6r_segleft); |
| |
| len = EXTRACT_U_1(dp->ip6r_len); |
| ND_PRINT("srcrt (len=%u", len); /*)*/ |
| type = EXTRACT_U_1(dp->ip6r_type); |
| ND_PRINT(", type=%u", type); |
| ND_PRINT(", segleft=%u", EXTRACT_U_1(dp->ip6r_segleft)); |
| |
| switch (type) { |
| case IPV6_RTHDR_TYPE_0: |
| case IPV6_RTHDR_TYPE_2: /* Mobile IPv6 ID-20 */ |
| dp0 = (const struct ip6_rthdr0 *)dp; |
| |
| ND_TCHECK_4(dp0->ip6r0_reserved); |
| if (EXTRACT_BE_U_4(dp0->ip6r0_reserved) || ndo->ndo_vflag) { |
| ND_PRINT(", rsv=0x%0x", |
| EXTRACT_BE_U_4(dp0->ip6r0_reserved)); |
| } |
| |
| if (len % 2 == 1) |
| goto trunc; |
| len >>= 1; |
| p = (const u_char *) dp0->ip6r0_addr; |
| for (i = 0; i < len; i++) { |
| ND_TCHECK_16(p); |
| ND_PRINT(", [%u]%s", i, ip6addr_string(ndo, p)); |
| p += 16; |
| } |
| /*(*/ |
| ND_PRINT(") "); |
| return((EXTRACT_U_1(dp0->ip6r0_len) + 1) << 3); |
| break; |
| case IPV6_RTHDR_TYPE_4: |
| srh = (const struct ip6_srh *)dp; |
| ND_TCHECK_1(srh->srh_last_ent); |
| ND_PRINT(", last-entry=%u", EXTRACT_U_1(srh->srh_last_ent)); |
| |
| ND_TCHECK_1(srh->srh_flags); |
| if (EXTRACT_U_1(srh->srh_flags) || ndo->ndo_vflag) { |
| ND_PRINT(", flags=0x%0x", |
| EXTRACT_U_1(srh->srh_flags)); |
| } |
| |
| ND_TCHECK_2(srh->srh_tag); |
| ND_PRINT(", tag=%x", EXTRACT_BE_U_2(srh->srh_tag)); |
| |
| if (len % 2 == 1) |
| goto trunc; |
| len >>= 1; |
| p = (const u_char *) srh->srh_segments; |
| for (i = 0; i < len; i++) { |
| ND_TCHECK_16(p); |
| ND_PRINT(", [%u]%s", i, ip6addr_string(ndo, p)); |
| p += 16; |
| } |
| /*(*/ |
| ND_PRINT(") "); |
| return((EXTRACT_U_1(srh->srh_len) + 1) << 3); |
| break; |
| default: |
| goto trunc; |
| break; |
| } |
| |
| trunc: |
| ND_PRINT("[|srcrt]"); |
| return -1; |
| } |