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-/* parsing packets: formats and tools
- * Copyright (C) 1997 Angelos D. Keromytis.
- * Copyright (C) 1998-2001 D. Hugh Redelmeier.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
- * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- * for more details.
- */
-
-#ifndef _PACKET_H
-#define _PACKET_H
-
-/* a struct_desc describes a structure for the struct I/O routines.
- * This requires arrays of field_desc values to describe struct fields.
- */
-
-typedef const struct struct_desc {
- const char *name;
- const struct field_desc *fields;
- size_t size;
-} struct_desc;
-
-/* Note: if an ft_af_enum field has the ISAKMP_ATTR_AF_TV bit set,
- * the subsequent ft_lv field will be interpreted as an immediate value.
- * This matches how attributes are encoded.
- * See RFC 2408 "ISAKMP" 3.3
- */
-
-enum field_type {
- ft_mbz, /* must be zero */
- ft_nat, /* natural number (may be 0) */
- ft_len, /* length of this struct and any following crud */
- ft_lv, /* length/value field of attribute */
- ft_enum, /* value from an enumeration */
- ft_loose_enum, /* value from an enumeration with only some names known */
- ft_af_loose_enum, /* Attribute Format + enumeration, some names known */
- ft_af_enum, /* Attribute Format + value from an enumeration */
- ft_set, /* bits representing set */
- ft_raw, /* bytes to be left in network-order */
- ft_end, /* end of field list */
-};
-
-typedef const struct field_desc {
- enum field_type field_type;
- int size; /* size, in bytes, of field */
- const char *name;
- const void *desc; /* enum_names for enum or char *[] for bits */
-} field_desc;
-
-/* The formatting of input and output of packets is done
- * through packet_byte_stream objects.
- * These describe a stream of bytes in memory.
- * Several routines are provided to manipulate these objects
- * Actual packet transfer is done elsewhere.
- */
-typedef struct packet_byte_stream {
- struct packet_byte_stream *container; /* PBS of which we are part */
- struct_desc *desc;
- const char *name; /* what does this PBS represent? */
- u_int8_t
- *start,
- *cur, /* current position in stream */
- *roof; /* byte after last in PBS (actually just a limit on output) */
- /* For an output PBS, the length field will be filled in later so
- * we need to record its particulars. Note: it may not be aligned.
- */
- u_int8_t *lenfld;
- field_desc *lenfld_desc;
-} pb_stream;
-
-/* For an input PBS, pbs_offset is amount of stream processed.
- * For an output PBS, pbs_offset is current size of stream.
- * For an input PBS, pbs_room is size of stream.
- * For an output PBS, pbs_room is maximum size allowed.
- */
-#define pbs_offset(pbs) ((size_t)((pbs)->cur - (pbs)->start))
-#define pbs_room(pbs) ((size_t)((pbs)->roof - (pbs)->start))
-#define pbs_left(pbs) ((size_t)((pbs)->roof - (pbs)->cur))
-
-extern void init_pbs(pb_stream *pbs, u_int8_t *start, size_t len, const char *name);
-
-extern bool in_struct(void *struct_ptr, struct_desc *sd,
- pb_stream *ins, pb_stream *obj_pbs);
-extern bool in_raw(void *bytes, size_t len, pb_stream *ins, const char *name);
-
-extern bool out_struct(const void *struct_ptr, struct_desc *sd,
- pb_stream *outs, pb_stream *obj_pbs);
-extern bool out_generic(u_int8_t np, struct_desc *sd,
- pb_stream *outs, pb_stream *obj_pbs);
-extern bool out_generic_raw(u_int8_t np, struct_desc *sd,
- pb_stream *outs, const void *bytes, size_t len, const char *name);
-#define out_generic_chunk(np, sd, outs, ch, name) \
- out_generic_raw(np, sd, outs, (ch).ptr, (ch).len, name)
-extern bool out_zero(size_t len, pb_stream *outs, const char *name);
-extern bool out_raw(const void *bytes, size_t len, pb_stream *outs, const char *name);
-#define out_chunk(ch, outs, name) out_raw((ch).ptr, (ch).len, (outs), (name))
-extern void close_output_pbs(pb_stream *pbs);
-
-#ifdef DEBUG
-extern void DBG_print_struct(const char *label, const void *struct_ptr,
- struct_desc *sd, bool len_meaningful);
-#endif
-
-/* ISAKMP Header: for all messages
- * layout from RFC 2408 "ISAKMP" section 3.1
- * 1 2 3
- * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * ! Initiator !
- * ! Cookie !
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * ! Responder !
- * ! Cookie !
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * ! Next Payload ! MjVer ! MnVer ! Exchange Type ! Flags !
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * ! Message ID !
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * ! Length !
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * Although the drafts are a little unclear, there are a few
- * places that specify that messages should be padded with 0x00
- * octets (bytes) to make the length a multiple of something.
- *
- * RFC 2408 "ISAKMP" 3.6 specifies that all messages will be
- * padded to be a multiple of 4 octets in length.
- * ??? This looks vestigial, and we ignore this requirement.
- *
- * RFC 2409 "IKE" Appedix B specifies:
- * Each message should be padded up to the nearest block size
- * using bytes containing 0x00.
- * ??? This does not appear to be limited to encrypted messages,
- * but it surely must be: the block size is meant to be the encryption
- * block size, and that is meaningless for a non-encrypted message.
- *
- * RFC 2409 "IKE" 5.3 specifies:
- * Encrypted payloads are padded up to the nearest block size.
- * All padding bytes, except for the last one, contain 0x00. The
- * last byte of the padding contains the number of the padding
- * bytes used, excluding the last one. Note that this means there
- * will always be padding.
- * ??? This is nuts since payloads are not padded, messages are.
- * It also contradicts Appendix B. So we ignore it.
- *
- * Summary: we pad encrypted output messages with 0x00 to bring them
- * up to a multiple of the encryption block size. On input, we require
- * that any encrypted portion of a message be a multiple of the encryption
- * block size. After any decryption, we ignore padding (any bytes after
- * the first payload that specifies a next payload of none; we don't
- * require them to be zero).
- */
-
-struct isakmp_hdr
-{
- u_int8_t isa_icookie[COOKIE_SIZE];
- u_int8_t isa_rcookie[COOKIE_SIZE];
- u_int8_t isa_np; /* Next payload */
- u_int8_t isa_version; /* high-order 4 bits: Major; low order 4: Minor */
-#define ISA_MAJ_SHIFT 4
-#define ISA_MIN_MASK (~((~0u) << ISA_MAJ_SHIFT))
- u_int8_t isa_xchg; /* Exchange type */
- u_int8_t isa_flags;
- u_int32_t isa_msgid; /* Message ID (RAW) */
- u_int32_t isa_length; /* Length of message */
-};
-
-extern struct_desc isakmp_hdr_desc;
-
-/* Generic portion of all ISAKMP payloads.
- * layout from RFC 2408 "ISAKMP" section 3.2
- * This describes the first 32-bit chunk of all payloads.
- * The previous next payload depends on the actual payload type.
- * 1 2 3
- * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * ! Next Payload ! RESERVED ! Payload Length !
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- */
-struct isakmp_generic
-{
- u_int8_t isag_np;
- u_int8_t isag_reserved;
- u_int16_t isag_length;
-};
-
-extern struct_desc isakmp_generic_desc;
-
-/* ISAKMP Data Attribute (generic representation within payloads)
- * layout from RFC 2408 "ISAKMP" section 3.3
- * This is not a payload type.
- * In TLV format, this is followed by a value field.
- * 1 2 3
- * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * !A! Attribute Type ! AF=0 Attribute Length !
- * !F! ! AF=1 Attribute Value !
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * . AF=0 Attribute Value .
- * . AF=1 Not Transmitted .
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- */
-struct isakmp_attribute
-{
- /* The high order bit of isaat_af_type is the Attribute Format
- * If it is off, the format is TLV: lv is the length of the following
- * attribute value.
- * If it is on, the format is TV: lv is the value of the attribute.
- * ISAKMP_ATTR_AF_MASK is the mask in host form.
- *
- * The low order 15 bits of isaat_af_type is the Attribute Type.
- * ISAKMP_ATTR_RTYPE_MASK is the mask in host form.
- */
- u_int16_t isaat_af_type; /* high order bit: AF; lower 15: rtype */
- u_int16_t isaat_lv; /* Length or value */
-};
-
-#define ISAKMP_ATTR_AF_MASK 0x8000
-#define ISAKMP_ATTR_AF_TV ISAKMP_ATTR_AF_MASK /* value in lv */
-#define ISAKMP_ATTR_AF_TLV 0 /* length in lv; value follows */
-
-#define ISAKMP_ATTR_RTYPE_MASK 0x7FFF
-
-extern struct_desc
- isakmp_oakley_attribute_desc,
- isakmp_ipsec_attribute_desc;
-
-/* ISAKMP Security Association Payload
- * layout from RFC 2408 "ISAKMP" section 3.4
- * A variable length Situation follows.
- * Previous next payload: ISAKMP_NEXT_SA
- * 1 2 3
- * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * ! Next Payload ! RESERVED ! Payload Length !
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * ! Domain of Interpretation (DOI) !
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * ! !
- * ~ Situation ~
- * ! !
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- */
-struct isakmp_sa
-{
- u_int8_t isasa_np; /* Next payload */
- u_int8_t isasa_reserved;
- u_int16_t isasa_length; /* Payload length */
- u_int32_t isasa_doi; /* DOI */
-};
-
-extern struct_desc isakmp_sa_desc;
-
-extern struct_desc ipsec_sit_desc;
-
-/* ISAKMP Proposal Payload
- * layout from RFC 2408 "ISAKMP" section 3.5
- * A variable length SPI follows.
- * Previous next payload: ISAKMP_NEXT_P
- * 1 2 3
- * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * ! Next Payload ! RESERVED ! Payload Length !
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * ! Proposal # ! Protocol-Id ! SPI Size !# of Transforms!
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * ! SPI (variable) !
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- */
-struct isakmp_proposal
-{
- u_int8_t isap_np;
- u_int8_t isap_reserved;
- u_int16_t isap_length;
- u_int8_t isap_proposal;
- u_int8_t isap_protoid;
- u_int8_t isap_spisize;
- u_int8_t isap_notrans; /* Number of transforms */
-};
-
-extern struct_desc isakmp_proposal_desc;
-
-/* ISAKMP Transform Payload
- * layout from RFC 2408 "ISAKMP" section 3.6
- * Variable length SA Attributes follow.
- * Previous next payload: ISAKMP_NEXT_T
- * 1 2 3
- * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * ! Next Payload ! RESERVED ! Payload Length !
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * ! Transform # ! Transform-Id ! RESERVED2 !
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * ! !
- * ~ SA Attributes ~
- * ! !
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- */
-struct isakmp_transform
-{
- u_int8_t isat_np;
- u_int8_t isat_reserved;
- u_int16_t isat_length;
- u_int8_t isat_transnum; /* Number of the transform */
- u_int8_t isat_transid;
- u_int16_t isat_reserved2;
-};
-
-extern struct_desc
- isakmp_isakmp_transform_desc,
- isakmp_ah_transform_desc,
- isakmp_esp_transform_desc,
- isakmp_ipcomp_transform_desc;
-
-/* ISAKMP Key Exchange Payload: no fixed fields beyond the generic ones.
- * layout from RFC 2408 "ISAKMP" section 3.7
- * Variable Key Exchange Data follow the generic fields.
- * Previous next payload: ISAKMP_NEXT_KE
- * 1 2 3
- * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * ! Next Payload ! RESERVED ! Payload Length !
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * ! !
- * ~ Key Exchange Data ~
- * ! !
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- */
-extern struct_desc isakmp_keyex_desc;
-
-/* ISAKMP Identification Payload
- * layout from RFC 2408 "ISAKMP" section 3.8
- * See "struct identity" declared later.
- * Variable length Identification Data follow.
- * Previous next payload: ISAKMP_NEXT_ID
- * 1 2 3
- * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * ! Next Payload ! RESERVED ! Payload Length !
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * ! ID Type ! DOI Specific ID Data !
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * ! !
- * ~ Identification Data ~
- * ! !
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- */
-struct isakmp_id
-{
- u_int8_t isaid_np;
- u_int8_t isaid_reserved;
- u_int16_t isaid_length;
- u_int8_t isaid_idtype;
- u_int8_t isaid_doi_specific_a;
- u_int16_t isaid_doi_specific_b;
-};
-
-extern struct_desc isakmp_identification_desc;
-
-/* IPSEC Identification Payload Content
- * layout from RFC 2407 "IPsec DOI" section 4.6.2
- * See struct isakmp_id declared earlier.
- * Note: Hashing skips the ISAKMP generic payload header
- * Variable length Identification Data follow.
- * 1 2 3
- * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * ! Next Payload ! RESERVED ! Payload Length !
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * ! ID Type ! Protocol ID ! Port !
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * ~ Identification Data ~
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- */
-struct isakmp_ipsec_id
-{
- u_int8_t isaiid_np;
- u_int8_t isaiid_reserved;
- u_int16_t isaiid_length;
- u_int8_t isaiid_idtype;
- u_int8_t isaiid_protoid;
- u_int16_t isaiid_port;
-};
-
-extern struct_desc isakmp_ipsec_identification_desc;
-
-/* ISAKMP Certificate Payload: no fixed fields beyond the generic ones.
- * layout from RFC 2408 "ISAKMP" section 3.9
- * Variable length Certificate Data follow the generic fields.
- * Previous next payload: ISAKMP_NEXT_CERT.
- * 1 2 3
- * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * ! Next Payload ! RESERVED ! Payload Length !
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * ! Cert Encoding ! !
- * +-+-+-+-+-+-+-+-+ !
- * ~ Certificate Data ~
- * ! !
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- */
-struct isakmp_cert
-{
- u_int8_t isacert_np;
- u_int8_t isacert_reserved;
- u_int16_t isacert_length;
- u_int8_t isacert_type;
-};
-
-/* NOTE: this packet type has a fixed portion that is not a
- * multiple of 4 octets. This means that sizeof(struct isakmp_cert)
- * yields the wrong value for the length.
- */
-#define ISAKMP_CERT_SIZE 5
-
-extern struct_desc isakmp_ipsec_certificate_desc;
-
-/* ISAKMP Certificate Request Payload: no fixed fields beyond the generic ones.
- * layout from RFC 2408 "ISAKMP" section 3.10
- * Variable length Certificate Types and Certificate Authorities follow.
- * Previous next payload: ISAKMP_NEXT_CR.
- * 1 2 3
- * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * ! Next Payload ! RESERVED ! Payload Length !
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * ! Cert. Type ! !
- * +-+-+-+-+-+-+-+-+ !
- * ~ Certificate Authority ~
- * ! !
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- */
-struct isakmp_cr
-{
- u_int8_t isacr_np;
- u_int8_t isacr_reserved;
- u_int16_t isacr_length;
- u_int8_t isacr_type;
-};
-
-/* NOTE: this packet type has a fixed portion that is not a
- * multiple of 4 octets. This means that sizeof(struct isakmp_cr)
- * yields the wrong value for the length.
- */
-#define ISAKMP_CR_SIZE 5
-
-extern struct_desc isakmp_ipsec_cert_req_desc;
-
-/* ISAKMP Hash Payload: no fixed fields beyond the generic ones.
- * layout from RFC 2408 "ISAKMP" section 3.11
- * Variable length Hash Data follow.
- * Previous next payload: ISAKMP_NEXT_HASH.
- * 1 2 3
- * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * ! Next Payload ! RESERVED ! Payload Length !
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * ! !
- * ~ Hash Data ~
- * ! !
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- */
-extern struct_desc isakmp_hash_desc;
-
-/* ISAKMP Signature Payload: no fixed fields beyond the generic ones.
- * layout from RFC 2408 "ISAKMP" section 3.12
- * Variable length Signature Data follow.
- * Previous next payload: ISAKMP_NEXT_SIG.
- * 1 2 3
- * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * ! Next Payload ! RESERVED ! Payload Length !
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * ! !
- * ~ Signature Data ~
- * ! !
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- */
-extern struct_desc isakmp_signature_desc;
-
-/* ISAKMP Nonce Payload: no fixed fields beyond the generic ones.
- * layout from RFC 2408 "ISAKMP" section 3.13
- * Variable length Nonce Data follow.
- * Previous next payload: ISAKMP_NEXT_NONCE.
- * 1 2 3
- * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * ! Next Payload ! RESERVED ! Payload Length !
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * ! !
- * ~ Nonce Data ~
- * ! !
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- */
-extern struct_desc isakmp_nonce_desc;
-
-/* ISAKMP Notification Payload
- * layout from RFC 2408 "ISAKMP" section 3.14
- * This is followed by a variable length SPI
- * and then possibly by variable length Notification Data.
- * Previous next payload: ISAKMP_NEXT_N
- * 1 2 3
- * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * ! Next Payload ! RESERVED ! Payload Length !
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * ! Domain of Interpretation (DOI) !
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * ! Protocol-ID ! SPI Size ! Notify Message Type !
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * ! !
- * ~ Security Parameter Index (SPI) ~
- * ! !
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * ! !
- * ~ Notification Data ~
- * ! !
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- */
-struct isakmp_notification
-{
- u_int8_t isan_np;
- u_int8_t isan_reserved;
- u_int16_t isan_length;
- u_int32_t isan_doi;
- u_int8_t isan_protoid;
- u_int8_t isan_spisize;
- u_int16_t isan_type;
-};
-
-extern struct_desc isakmp_notification_desc;
-
-/* ISAKMP Delete Payload
- * layout from RFC 2408 "ISAKMP" section 3.15
- * This is followed by a variable length SPI.
- * Previous next payload: ISAKMP_NEXT_D
- * 1 2 3
- * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * ! Next Payload ! RESERVED ! Payload Length !
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * ! Domain of Interpretation (DOI) !
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * ! Protocol-Id ! SPI Size ! # of SPIs !
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * ! !
- * ~ Security Parameter Index(es) (SPI) ~
- * ! !
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- */
-struct isakmp_delete
-{
- u_int8_t isad_np;
- u_int8_t isad_reserved;
- u_int16_t isad_length;
- u_int32_t isad_doi;
- u_int8_t isad_protoid;
- u_int8_t isad_spisize;
- u_int16_t isad_nospi;
-};
-
-extern struct_desc isakmp_delete_desc;
-
-/* From draft-dukes-ike-mode-cfg
-3.2. Attribute Payload
- 1 2 3
- 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- ! Next Payload ! RESERVED ! Payload Length !
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- ! Type ! RESERVED ! Identifier !
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- ! !
- ! !
- ~ Attributes ~
- ! !
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-*/
-struct isakmp_mode_attr
-{
- u_int8_t isama_np;
- u_int8_t isama_reserved;
- u_int16_t isama_length;
- u_int8_t isama_type;
- u_int8_t isama_reserved2;
- u_int16_t isama_identifier;
-};
-
-extern struct_desc isakmp_attr_desc;
-extern struct_desc isakmp_modecfg_attribute_desc;
-
-/* ISAKMP Vendor ID Payload
- * layout from RFC 2408 "ISAKMP" section 3.15
- * This is followed by a variable length VID.
- * Previous next payload: ISAKMP_NEXT_VID
- * 1 2 3
- * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * ! Next Payload ! RESERVED ! Payload Length !
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * ! !
- * ~ Vendor ID (VID) ~
- * ! !
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- */
-extern struct_desc isakmp_vendor_id_desc;
-
-struct isakmp_nat_oa
-{
- u_int8_t isanoa_np;
- u_int8_t isanoa_reserved_1;
- u_int16_t isanoa_length;
- u_int8_t isanoa_idtype;
- u_int8_t isanoa_reserved_2;
- u_int16_t isanoa_reserved_3;
-};
-
-extern struct_desc isakmp_nat_d;
-extern struct_desc isakmp_nat_oa;
-
-/* union of all payloads */
-
-union payload {
- struct isakmp_generic generic;
- struct isakmp_sa sa;
- struct isakmp_proposal proposal;
- struct isakmp_transform transform;
- struct isakmp_id id; /* Main Mode */
- struct isakmp_cert cert;
- struct isakmp_cr cr;
- struct isakmp_ipsec_id ipsec_id; /* Quick Mode */
- struct isakmp_notification notification;
- struct isakmp_delete delete;
- struct isakmp_nat_oa nat_oa;
- struct isakmp_mode_attr attribute;
-};
-
-/* descriptor for each payload type
- *
- * There is a slight problem in that some payloads differ, depending
- * on the mode. Since this is table only used for top-level payloads,
- * Proposal and Transform payloads need not be handled.
- * That leaves only Identification payloads as a problem.
- * We make all these entries NULL
- */
-extern struct_desc *const payload_descs[ISAKMP_NEXT_ROOF];
-
-#endif /* _PACKET_H */
generated by cgit v1.2.3 (git 2.39.1) at 2024-09-20 16:32:47 +0000