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[SCTP]: protocol definitions for SCTP-AUTH implementation 

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vlad Yasevich 2007-09-16 19:26:06 -07:00 committed by David S. Miller
parent 96793b4825
commit f7b0e93ba1
1 changed files with 99 additions and 1 deletions
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100
include/linux/sctp.h
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@ -102,6 +102,9 @@ typedef enum {
SCTP_CID_ECN_CWR = 13,
SCTP_CID_SHUTDOWN_COMPLETE = 14,
/* AUTH Extension Section 4.1 */
SCTP_CID_AUTH = 0x0F,
/* PR-SCTP Sec 3.2 */
SCTP_CID_FWD_TSN = 0xC0,
@ -180,6 +183,11 @@ typedef enum {
SCTP_PARAM_SUPPORTED_ADDRESS_TYPES = __constant_htons(12),
SCTP_PARAM_ECN_CAPABLE = __constant_htons(0x8000),
/* AUTH Extension Section 3 */
SCTP_PARAM_RANDOM = __constant_htons(0x8002),
SCTP_PARAM_CHUNKS = __constant_htons(0x8003),
SCTP_PARAM_HMAC_ALGO = __constant_htons(0x8004),
/* Add-IP: Supported Extensions, Section 4.2 */
SCTP_PARAM_SUPPORTED_EXT = __constant_htons(0x8008),
@ -305,6 +313,24 @@ typedef struct sctp_supported_ext_param {
__u8 chunks[0];
} __attribute__((packed)) sctp_supported_ext_param_t;
/* AUTH Section 3.1 Random */
typedef struct sctp_random_param {
sctp_paramhdr_t param_hdr;
__u8 random_val[0];
} __attribute__((packed)) sctp_random_param_t;
/* AUTH Section 3.2 Chunk List */
typedef struct sctp_chunks_param {
sctp_paramhdr_t param_hdr;
__u8 chunks[0];
} __attribute__((packed)) sctp_chunks_param_t;
/* AUTH Section 3.3 HMAC Algorithm */
typedef struct sctp_hmac_algo_param {
sctp_paramhdr_t param_hdr;
__be16 hmac_ids[0];
} __attribute__((packed)) sctp_hmac_algo_param_t;
/* RFC 2960. Section 3.3.3 Initiation Acknowledgement (INIT ACK) (2):
* The INIT ACK chunk is used to acknowledge the initiation of an SCTP
* association.
@ -471,7 +497,19 @@ typedef enum {
SCTP_ERROR_RSRC_LOW = __constant_htons(0x0101),
SCTP_ERROR_DEL_SRC_IP = __constant_htons(0x0102),
SCTP_ERROR_ASCONF_ACK = __constant_htons(0x0103),
SCTP_ERROR_REQ_REFUSED = __constant_htons(0x0104)
SCTP_ERROR_REQ_REFUSED = __constant_htons(0x0104),
/* AUTH Section 4. New Error Cause
*
* This section defines a new error cause that will be sent if an AUTH
* chunk is received with an unsupported HMAC identifier.
* illustrates the new error cause.
*
* Cause Code Error Cause Name
* --------------------------------------------------------------
* 0x0105 Unsupported HMAC Identifier
*/
SCTP_ERROR_UNSUP_HMAC = __constant_htons(0x0105)
} sctp_error_t;
@ -609,4 +647,64 @@ typedef struct sctp_addip_chunk {
sctp_addiphdr_t addip_hdr;
} __attribute__((packed)) sctp_addip_chunk_t;
/* AUTH
* Section 4.1 Authentication Chunk (AUTH)
*
* This chunk is used to hold the result of the HMAC calculation.
*
* 0 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
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Type = 0x0F | Flags=0 | Length |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Shared Key Identifier | HMAC Identifier |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | |
* \ HMAC /
* / \
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*
* Type: 1 byte (unsigned integer)
* This value MUST be set to 0x0F for all AUTH-chunks.
*
* Flags: 1 byte (unsigned integer)
* Set to zero on transmit and ignored on receipt.
*
* Length: 2 bytes (unsigned integer)
* This value holds the length of the HMAC in bytes plus 8.
*
* Shared Key Identifier: 2 bytes (unsigned integer)
* This value describes which endpoint pair shared key is used.
*
* HMAC Identifier: 2 bytes (unsigned integer)
* This value describes which message digest is being used. Table 2
* shows the currently defined values.
*
* The following Table 2 shows the currently defined values for HMAC
* identifiers.
*
* +-----------------+--------------------------+
* | HMAC Identifier | Message Digest Algorithm |
* +-----------------+--------------------------+
* | 0 | Reserved |
* | 1 | SHA-1 defined in [8] |
* | 2 | Reserved |
* | 3 | SHA-256 defined in [8] |
* +-----------------+--------------------------+
*
*
* HMAC: n bytes (unsigned integer) This hold the result of the HMAC
* calculation.
*/
typedef struct sctp_authhdr {
__be16 shkey_id;
__be16 hmac_id;
__u8 hmac[0];
} __attribute__((packed)) sctp_authhdr_t;
typedef struct sctp_auth_chunk {
sctp_chunkhdr_t chunk_hdr;
sctp_authhdr_t auth_hdr;
} __attribute__((packed)) sctp_auth_chunk_t;
#endif /* __LINUX_SCTP_H__ */