/* Section 3.1. SCTP Common Header Format */
typedef struct sctphdr {
- __u16 source;
- __u16 dest;
- __u32 vtag;
- __u32 checksum;
+ __be16 source;
+ __be16 dest;
+ __be32 vtag;
+ __be32 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 {
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),
+
/* PR-SCTP Sec 3.1 */
SCTP_PARAM_FWD_TSN_SUPPORT = __constant_htons(0xc000),
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_ADAPTATION_LAYER_IND = __constant_htons(0xc006),
} sctp_param_t; /* enum */
/* 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;
* 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;
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;
* 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__ */