*
* Various protocol defined structures.
*
- * The SCTP reference implementation is free software;
+ * This SCTP implementation 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, or (at your option)
* any later version.
*
- * The SCTP reference implementation is distributed in the hope that it
+ * This SCTP implementation 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.
/* Section 3.1. SCTP Common Header Format */
typedef struct sctphdr {
- __u16 source;
- __u16 dest;
- __u32 vtag;
- __u32 checksum;
+ __be16 source;
+ __be16 dest;
+ __be32 vtag;
+ __le32 checksum;
} __attribute__((packed)) sctp_sctphdr_t;
+#ifdef __KERNEL__
+#include <linux/skbuff.h>
+
+static inline struct sctphdr *sctp_hdr(const struct sk_buff *skb)
+{
+ return (struct sctphdr *)skb_transport_header(skb);
+}
+#endif
+
/* Section 3.2. Chunk Field Descriptions. */
typedef struct sctp_chunkhdr {
__u8 type;
__u8 flags;
- __u16 length;
+ __be16 length;
} __attribute__((packed)) sctp_chunkhdr_t;
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,
*/
typedef struct sctp_paramhdr {
- __u16 type;
- __u16 length;
+ __be16 type;
+ __be16 length;
} __attribute__((packed)) sctp_paramhdr_t;
typedef enum {
/* RFC 2960 Section 3.3.5 */
- SCTP_PARAM_HEARTBEAT_INFO = __constant_htons(1),
+ SCTP_PARAM_HEARTBEAT_INFO = cpu_to_be16(1),
/* RFC 2960 Section 3.3.2.1 */
- SCTP_PARAM_IPV4_ADDRESS = __constant_htons(5),
- SCTP_PARAM_IPV6_ADDRESS = __constant_htons(6),
- SCTP_PARAM_STATE_COOKIE = __constant_htons(7),
- SCTP_PARAM_UNRECOGNIZED_PARAMETERS = __constant_htons(8),
- SCTP_PARAM_COOKIE_PRESERVATIVE = __constant_htons(9),
- SCTP_PARAM_HOST_NAME_ADDRESS = __constant_htons(11),
- SCTP_PARAM_SUPPORTED_ADDRESS_TYPES = __constant_htons(12),
- SCTP_PARAM_ECN_CAPABLE = __constant_htons(0x8000),
+ SCTP_PARAM_IPV4_ADDRESS = cpu_to_be16(5),
+ SCTP_PARAM_IPV6_ADDRESS = cpu_to_be16(6),
+ SCTP_PARAM_STATE_COOKIE = cpu_to_be16(7),
+ SCTP_PARAM_UNRECOGNIZED_PARAMETERS = cpu_to_be16(8),
+ SCTP_PARAM_COOKIE_PRESERVATIVE = cpu_to_be16(9),
+ SCTP_PARAM_HOST_NAME_ADDRESS = cpu_to_be16(11),
+ SCTP_PARAM_SUPPORTED_ADDRESS_TYPES = cpu_to_be16(12),
+ SCTP_PARAM_ECN_CAPABLE = cpu_to_be16(0x8000),
+
+ /* AUTH Extension Section 3 */
+ SCTP_PARAM_RANDOM = cpu_to_be16(0x8002),
+ SCTP_PARAM_CHUNKS = cpu_to_be16(0x8003),
+ SCTP_PARAM_HMAC_ALGO = cpu_to_be16(0x8004),
+
+ /* Add-IP: Supported Extensions, Section 4.2 */
+ SCTP_PARAM_SUPPORTED_EXT = cpu_to_be16(0x8008),
/* PR-SCTP Sec 3.1 */
- SCTP_PARAM_FWD_TSN_SUPPORT = __constant_htons(0xc000),
+ SCTP_PARAM_FWD_TSN_SUPPORT = cpu_to_be16(0xc000),
/* Add-IP Extension. Section 3.2 */
- SCTP_PARAM_ADD_IP = __constant_htons(0xc001),
- SCTP_PARAM_DEL_IP = __constant_htons(0xc002),
- SCTP_PARAM_ERR_CAUSE = __constant_htons(0xc003),
- SCTP_PARAM_SET_PRIMARY = __constant_htons(0xc004),
- SCTP_PARAM_SUCCESS_REPORT = __constant_htons(0xc005),
- SCTP_PARAM_ADAPTION_LAYER_IND = __constant_htons(0xc006),
+ SCTP_PARAM_ADD_IP = cpu_to_be16(0xc001),
+ SCTP_PARAM_DEL_IP = cpu_to_be16(0xc002),
+ SCTP_PARAM_ERR_CAUSE = cpu_to_be16(0xc003),
+ SCTP_PARAM_SET_PRIMARY = cpu_to_be16(0xc004),
+ SCTP_PARAM_SUCCESS_REPORT = cpu_to_be16(0xc005),
+ SCTP_PARAM_ADAPTATION_LAYER_IND = cpu_to_be16(0xc006),
} sctp_param_t; /* enum */
*
*/
typedef enum {
- SCTP_PARAM_ACTION_DISCARD = __constant_htons(0x0000),
- SCTP_PARAM_ACTION_DISCARD_ERR = __constant_htons(0x4000),
- SCTP_PARAM_ACTION_SKIP = __constant_htons(0x8000),
- SCTP_PARAM_ACTION_SKIP_ERR = __constant_htons(0xc000),
+ SCTP_PARAM_ACTION_DISCARD = cpu_to_be16(0x0000),
+ SCTP_PARAM_ACTION_DISCARD_ERR = cpu_to_be16(0x4000),
+ SCTP_PARAM_ACTION_SKIP = cpu_to_be16(0x8000),
+ SCTP_PARAM_ACTION_SKIP_ERR = cpu_to_be16(0xc000),
} sctp_param_action_t;
-enum { SCTP_PARAM_ACTION_MASK = __constant_htons(0xc000), };
+enum { SCTP_PARAM_ACTION_MASK = cpu_to_be16(0xc000), };
/* RFC 2960 Section 3.3.1 Payload Data (DATA) (0) */
typedef struct sctp_datahdr {
- __u32 tsn;
- __u16 stream;
- __u16 ssn;
- __u32 ppid;
+ __be32 tsn;
+ __be16 stream;
+ __be16 ssn;
+ __be32 ppid;
__u8 payload[0];
} __attribute__((packed)) sctp_datahdr_t;
SCTP_DATA_FIRST_FRAG = 0x02,
SCTP_DATA_NOT_FRAG = 0x03,
SCTP_DATA_UNORDERED = 0x04,
+ SCTP_DATA_SACK_IMM = 0x08,
};
enum { SCTP_DATA_FRAG_MASK = 0x03, };
* endpoints.
*/
typedef struct sctp_inithdr {
- __u32 init_tag;
- __u32 a_rwnd;
- __u16 num_outbound_streams;
- __u16 num_inbound_streams;
- __u32 initial_tsn;
+ __be32 init_tag;
+ __be32 a_rwnd;
+ __be16 num_outbound_streams;
+ __be16 num_inbound_streams;
+ __be32 initial_tsn;
__u8 params[0];
} __attribute__((packed)) sctp_inithdr_t;
/* Section 3.3.2.1 Cookie Preservative (9) */
typedef struct sctp_cookie_preserve_param {
sctp_paramhdr_t param_hdr;
- uint32_t lifespan_increment;
+ __be32 lifespan_increment;
} __attribute__((packed)) sctp_cookie_preserve_param_t;
/* Section 3.3.2.1 Host Name Address (11) */
/* Section 3.3.2.1 Supported Address Types (12) */
typedef struct sctp_supported_addrs_param {
sctp_paramhdr_t param_hdr;
- uint16_t types[0];
+ __be16 types[0];
} __attribute__((packed)) sctp_supported_addrs_param_t;
/* Appendix A. ECN Capable (32768) */
sctp_paramhdr_t param_hdr;
} __attribute__((packed)) sctp_ecn_capable_param_t;
-/* ADDIP Section 3.2.6 Adaption Layer Indication */
-typedef struct sctp_adaption_ind_param {
+/* ADDIP Section 3.2.6 Adaptation Layer Indication */
+typedef struct sctp_adaptation_ind_param {
+ struct sctp_paramhdr param_hdr;
+ __be32 adaptation_ind;
+} __attribute__((packed)) sctp_adaptation_ind_param_t;
+
+/* ADDIP Section 4.2.7 Supported Extensions Parameter */
+typedef struct sctp_supported_ext_param {
struct sctp_paramhdr param_hdr;
- __u32 adaption_ind;
-} __attribute__((packed)) sctp_adaption_ind_param_t;
+ __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
*/
typedef struct sctp_gap_ack_block {
- __u16 start;
- __u16 end;
+ __be16 start;
+ __be16 end;
} __attribute__((packed)) sctp_gap_ack_block_t;
-typedef uint32_t sctp_dup_tsn_t;
+typedef __be32 sctp_dup_tsn_t;
typedef union {
sctp_gap_ack_block_t gab;
} sctp_sack_variable_t;
typedef struct sctp_sackhdr {
- __u32 cum_tsn_ack;
- __u32 a_rwnd;
- __u16 num_gap_ack_blocks;
- __u16 num_dup_tsns;
+ __be32 cum_tsn_ack;
+ __be32 a_rwnd;
+ __be16 num_gap_ack_blocks;
+ __be16 num_dup_tsns;
sctp_sack_variable_t variable[0];
} __attribute__((packed)) sctp_sackhdr_t;
* and the highest consecutive acking value.
*/
typedef struct sctp_shutdownhdr {
- __u32 cum_tsn_ack;
+ __be32 cum_tsn_ack;
} __attribute__((packed)) sctp_shutdownhdr_t;
struct sctp_shutdown_chunk_t {
/* RFC 2960. Section 3.3.10 Operation Error (ERROR) (9) */
typedef struct sctp_errhdr {
- __u16 cause;
- __u16 length;
+ __be16 cause;
+ __be16 length;
__u8 variable[0];
} __attribute__((packed)) sctp_errhdr_t;
*/
typedef enum {
- SCTP_ERROR_NO_ERROR = __constant_htons(0x00),
- SCTP_ERROR_INV_STRM = __constant_htons(0x01),
- SCTP_ERROR_MISS_PARAM = __constant_htons(0x02),
- SCTP_ERROR_STALE_COOKIE = __constant_htons(0x03),
- SCTP_ERROR_NO_RESOURCE = __constant_htons(0x04),
- SCTP_ERROR_DNS_FAILED = __constant_htons(0x05),
- SCTP_ERROR_UNKNOWN_CHUNK = __constant_htons(0x06),
- SCTP_ERROR_INV_PARAM = __constant_htons(0x07),
- SCTP_ERROR_UNKNOWN_PARAM = __constant_htons(0x08),
- SCTP_ERROR_NO_DATA = __constant_htons(0x09),
- SCTP_ERROR_COOKIE_IN_SHUTDOWN = __constant_htons(0x0a),
+ SCTP_ERROR_NO_ERROR = cpu_to_be16(0x00),
+ SCTP_ERROR_INV_STRM = cpu_to_be16(0x01),
+ SCTP_ERROR_MISS_PARAM = cpu_to_be16(0x02),
+ SCTP_ERROR_STALE_COOKIE = cpu_to_be16(0x03),
+ SCTP_ERROR_NO_RESOURCE = cpu_to_be16(0x04),
+ SCTP_ERROR_DNS_FAILED = cpu_to_be16(0x05),
+ SCTP_ERROR_UNKNOWN_CHUNK = cpu_to_be16(0x06),
+ SCTP_ERROR_INV_PARAM = cpu_to_be16(0x07),
+ SCTP_ERROR_UNKNOWN_PARAM = cpu_to_be16(0x08),
+ SCTP_ERROR_NO_DATA = cpu_to_be16(0x09),
+ SCTP_ERROR_COOKIE_IN_SHUTDOWN = cpu_to_be16(0x0a),
/* SCTP Implementation Guide:
* 13 Protocol Violation
*/
- SCTP_ERROR_RESTART = __constant_htons(0x0b),
- SCTP_ERROR_USER_ABORT = __constant_htons(0x0c),
- SCTP_ERROR_PROTO_VIOLATION = __constant_htons(0x0d),
+ SCTP_ERROR_RESTART = cpu_to_be16(0x0b),
+ SCTP_ERROR_USER_ABORT = cpu_to_be16(0x0c),
+ SCTP_ERROR_PROTO_VIOLATION = cpu_to_be16(0x0d),
/* ADDIP Section 3.3 New Error Causes
*
*
* Value Cause Code
* --------- ----------------
- * 0x0100 Request to Delete Last Remaining IP Address.
- * 0x0101 Operation Refused Due to Resource Shortage.
- * 0x0102 Request to Delete Source IP Address.
- * 0x0103 Association Aborted due to illegal ASCONF-ACK
- * 0x0104 Request refused - no authorization.
+ * 0x00A0 Request to Delete Last Remaining IP Address.
+ * 0x00A1 Operation Refused Due to Resource Shortage.
+ * 0x00A2 Request to Delete Source IP Address.
+ * 0x00A3 Association Aborted due to illegal ASCONF-ACK
+ * 0x00A4 Request refused - no authorization.
+ */
+ SCTP_ERROR_DEL_LAST_IP = cpu_to_be16(0x00A0),
+ SCTP_ERROR_RSRC_LOW = cpu_to_be16(0x00A1),
+ SCTP_ERROR_DEL_SRC_IP = cpu_to_be16(0x00A2),
+ SCTP_ERROR_ASCONF_ACK = cpu_to_be16(0x00A3),
+ SCTP_ERROR_REQ_REFUSED = cpu_to_be16(0x00A4),
+
+ /* 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_DEL_LAST_IP = __constant_htons(0x0100),
- 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_UNSUP_HMAC = cpu_to_be16(0x0105)
} sctp_error_t;
* Explicit Congestion Notification Echo (ECNE) (12)
*/
typedef struct sctp_ecnehdr {
- __u32 lowest_tsn;
+ __be32 lowest_tsn;
} sctp_ecnehdr_t;
typedef struct sctp_ecne_chunk {
* Congestion Window Reduced (CWR) (13)
*/
typedef struct sctp_cwrhdr {
- __u32 lowest_tsn;
+ __be32 lowest_tsn;
} sctp_cwrhdr_t;
typedef struct sctp_cwr_chunk {
* chunks this field MUST be filled in.
*/
struct sctp_fwdtsn_skip {
- __u16 stream;
- __u16 ssn;
+ __be16 stream;
+ __be16 ssn;
} __attribute__((packed));
struct sctp_fwdtsn_hdr {
- __u32 new_cum_tsn;
+ __be32 new_cum_tsn;
struct sctp_fwdtsn_skip skip[0];
} __attribute((packed));
*/
typedef struct sctp_addip_param {
sctp_paramhdr_t param_hdr;
- __u32 crr_id;
+ __be32 crr_id;
} __attribute__((packed)) sctp_addip_param_t;
typedef struct sctp_addiphdr {
- __u32 serial;
+ __be32 serial;
__u8 params[0];
} __attribute__((packed)) sctp_addiphdr_t;
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__ */
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