[SCTP]: protocol definitions for SCTP-AUTH implementation (f7b0e93b) · Commits · e / devices / android_kernel_samsung_universal8890

include/linux/sctp.h

+99 −1

Original line number	Diff line number	Diff line
		@@ -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__ */