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Diffstat (limited to 'print-ip-demux.c')
| -rw-r--r-- | print-ip-demux.c | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/print-ip-demux.c b/print-ip-demux.c new file mode 100644 index 0000000..a0a6fbd --- /dev/null +++ b/print-ip-demux.c @@ -0,0 +1,231 @@ +/* + * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997 + * 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: IPv4/IPv6 payload printer */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include "netdissect-stdinc.h" + +#include "netdissect.h" +#include "addrtoname.h" +#include "extract.h" + +#include "ip.h" +#include "ipproto.h" + +void +ip_demux_print(netdissect_options *ndo, + const u_char *bp, + u_int length, u_int ver, int fragmented, u_int ttl_hl, + uint8_t nh, const u_char *iph) +{ + int advance; + const char *p_name; + + advance = 0; + +again: + switch (nh) { + + case IPPROTO_AH: + if (!ND_TTEST_1(bp)) { + ndo->ndo_protocol = "ah"; + nd_print_trunc(ndo); + break; + } + nh = GET_U_1(bp); + advance = ah_print(ndo, bp); + if (advance <= 0) + break; + bp += advance; + length -= advance; + goto again; + + case IPPROTO_ESP: + { + esp_print(ndo, bp, length, iph, ver, fragmented, ttl_hl); + /* + * Either this has decrypted the payload and + * printed it, in which case there's nothing more + * to do, or it hasn't, in which case there's + * nothing more to do. + */ + break; + } + + case IPPROTO_IPCOMP: + { + ipcomp_print(ndo, bp); + /* + * Either this has decompressed the payload and + * printed it, in which case there's nothing more + * to do, or it hasn't, in which case there's + * nothing more to do. + */ + break; + } + + case IPPROTO_SCTP: + sctp_print(ndo, bp, iph, length); + break; + + case IPPROTO_DCCP: + dccp_print(ndo, bp, iph, length); + break; + + case IPPROTO_TCP: + tcp_print(ndo, bp, length, iph, fragmented); + break; + + case IPPROTO_UDP: + udp_print(ndo, bp, length, iph, fragmented, ttl_hl); + break; + + case IPPROTO_ICMP: + if (ver == 4) + icmp_print(ndo, bp, length, iph, fragmented); + else { + ND_PRINT("[%s requires IPv4]", + tok2str(ipproto_values,"unknown",nh)); + nd_print_invalid(ndo); + } + break; + + case IPPROTO_ICMPV6: + if (ver == 6) + icmp6_print(ndo, bp, length, iph, fragmented); + else { + ND_PRINT("[%s requires IPv6]", + tok2str(ipproto_values,"unknown",nh)); + nd_print_invalid(ndo); + } + break; + + case IPPROTO_PIGP: + /* + * XXX - the current IANA protocol number assignments + * page lists 9 as "any private interior gateway + * (used by Cisco for their IGRP)" and 88 as + * "EIGRP" from Cisco. + * + * Recent BSD <netinet/in.h> headers define + * IP_PROTO_PIGP as 9 and IP_PROTO_IGRP as 88. + * We define IP_PROTO_PIGP as 9 and + * IP_PROTO_EIGRP as 88; those names better + * match was the current protocol number + * assignments say. + */ + igrp_print(ndo, bp, length); + break; + + case IPPROTO_EIGRP: + eigrp_print(ndo, bp, length); + break; + + case IPPROTO_ND: + ND_PRINT(" nd %u", length); + break; + + case IPPROTO_EGP: + egp_print(ndo, bp, length); + break; + + case IPPROTO_OSPF: + if (ver == 6) + ospf6_print(ndo, bp, length); + else + ospf_print(ndo, bp, length, iph); + break; + + case IPPROTO_IGMP: + if (ver == 4) + igmp_print(ndo, bp, length); + else { + ND_PRINT("[%s requires IPv4]", + tok2str(ipproto_values,"unknown",nh)); + nd_print_invalid(ndo); + } + break; + + case IPPROTO_IPV4: + /* ipv4-in-ip encapsulation */ + ip_print(ndo, bp, length); + break; + + case IPPROTO_IPV6: + /* ip6-in-ip encapsulation */ + ip6_print(ndo, bp, length); + break; + + case IPPROTO_RSVP: + rsvp_print(ndo, bp, length); + break; + + case IPPROTO_GRE: + gre_print(ndo, bp, length); + break; + + case IPPROTO_MOBILE: + mobile_print(ndo, bp, length); + break; + + case IPPROTO_PIM: + pim_print(ndo, bp, length, iph); + break; + + case IPPROTO_VRRP: + if (ndo->ndo_packettype == PT_CARP) { + carp_print(ndo, bp, length, ttl_hl); + } else { + vrrp_print(ndo, bp, length, iph, ttl_hl, ver); + } + break; + + case IPPROTO_PGM: + pgm_print(ndo, bp, length, iph); + break; + + case IPPROTO_ETHERNET: + if (ver == 6) + ether_print(ndo, bp, length, ND_BYTES_AVAILABLE_AFTER(bp), NULL, NULL); + else { + ND_PRINT("[%s requires IPv6]", + tok2str(ipproto_values,"unknown",nh)); + nd_print_invalid(ndo); + } + break; + + case IPPROTO_NONE: + ND_PRINT("no next header"); + break; + + default: + if (ndo->ndo_nflag==0 && (p_name = netdb_protoname(nh)) != NULL) + ND_PRINT(" %s", p_name); + else + ND_PRINT(" ip-proto-%u", nh); + ND_PRINT(" %u", length); + break; + } +} |