include/uapi/linux/sctp.h

File Facts

System

Linux kernel

Corpus path

include/uapi/linux/sctp.h

Extension

.h

Size

36122 bytes

Lines

1227

Domain

Core OS

Bucket

Core Kernel Interface

Inferred role

Core OS: implementation source

Status

source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

• Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/types.h
• linux/socket.h

Detected Declarations

• struct sctp_initmsg
• struct sctp_sndrcvinfo
• struct sctp_sndinfo
• struct sctp_rcvinfo
• struct sctp_nxtinfo
• struct sctp_prinfo
• struct sctp_authinfo
• struct sctp_assoc_change
• struct sctp_paddr_change
• struct sctp_remote_error
• struct sctp_send_failed
• struct sctp_send_failed_event
• struct sctp_shutdown_event
• struct sctp_adaptation_event
• struct sctp_pdapi_event
• struct sctp_authkey_event
• struct sctp_sender_dry_event
• struct sctp_stream_reset_event
• struct sctp_assoc_reset_event
• struct sctp_stream_change_event
• struct sctp_event_subscribe
• struct sctp_rtoinfo
• struct sctp_assocparams
• struct sctp_setpeerprim
• struct sctp_prim
• struct sctp_setadaptation
• struct sctp_paddrparams
• struct sctp_authchunk
• struct sctp_hmacalgo
• struct sctp_authkey
• struct sctp_authkeyid
• struct sctp_sack_info
• struct sctp_assoc_value
• struct sctp_stream_value
• struct sctp_paddrinfo
• struct sctp_status
• struct sctp_authchunks
• struct sctp_assoc_ids
• struct sctp_getaddrs_old
• struct sctp_getaddrs
• struct sctp_assoc_stats
• struct sctp_paddrthlds
• struct sctp_paddrthlds_v2
• struct sctp_prstatus
• struct sctp_default_prinfo
• struct sctp_info
• struct sctp_reset_streams
• struct sctp_add_streams

Annotated Snippet

struct sctp_initmsg {
	__u16 sinit_num_ostreams;
	__u16 sinit_max_instreams;
	__u16 sinit_max_attempts;
	__u16 sinit_max_init_timeo;
};

/* 5.3.2 SCTP Header Information Structure (SCTP_SNDRCV)
 *
 *   This cmsghdr structure specifies SCTP options for sendmsg() and
 *   describes SCTP header information about a received message through
 *   recvmsg().
 *
 *   cmsg_level    cmsg_type      cmsg_data[]
 *   ------------  ------------   ----------------------
 *   IPPROTO_SCTP  SCTP_SNDRCV    struct sctp_sndrcvinfo
 */
struct sctp_sndrcvinfo {
	__u16 sinfo_stream;
	__u16 sinfo_ssn;
	__u16 sinfo_flags;
	__u32 sinfo_ppid;
	__u32 sinfo_context;
	__u32 sinfo_timetolive;
	__u32 sinfo_tsn;
	__u32 sinfo_cumtsn;
	sctp_assoc_t sinfo_assoc_id;
};

/* 5.3.4 SCTP Send Information Structure (SCTP_SNDINFO)
 *
 *   This cmsghdr structure specifies SCTP options for sendmsg().
 *
 *   cmsg_level    cmsg_type      cmsg_data[]
 *   ------------  ------------   -------------------
 *   IPPROTO_SCTP  SCTP_SNDINFO   struct sctp_sndinfo
 */
struct sctp_sndinfo {
	__u16 snd_sid;
	__u16 snd_flags;
	__u32 snd_ppid;
	__u32 snd_context;
	sctp_assoc_t snd_assoc_id;
};

/* 5.3.5 SCTP Receive Information Structure (SCTP_RCVINFO)
 *
 *   This cmsghdr structure describes SCTP receive information
 *   about a received message through recvmsg().
 *
 *   cmsg_level    cmsg_type      cmsg_data[]
 *   ------------  ------------   -------------------
 *   IPPROTO_SCTP  SCTP_RCVINFO   struct sctp_rcvinfo
 */
struct sctp_rcvinfo {
	__u16 rcv_sid;
	__u16 rcv_ssn;
	__u16 rcv_flags;
	__u32 rcv_ppid;
	__u32 rcv_tsn;
	__u32 rcv_cumtsn;
	__u32 rcv_context;
	sctp_assoc_t rcv_assoc_id;
};

/* 5.3.6 SCTP Next Receive Information Structure (SCTP_NXTINFO)
 *
 *   This cmsghdr structure describes SCTP receive information
 *   of the next message that will be delivered through recvmsg()
 *   if this information is already available when delivering
 *   the current message.
 *
 *   cmsg_level    cmsg_type      cmsg_data[]
 *   ------------  ------------   -------------------
 *   IPPROTO_SCTP  SCTP_NXTINFO   struct sctp_nxtinfo
 */
struct sctp_nxtinfo {
	__u16 nxt_sid;
	__u16 nxt_flags;
	__u32 nxt_ppid;
	__u32 nxt_length;
	sctp_assoc_t nxt_assoc_id;
};

/* 5.3.7 SCTP PR-SCTP Information Structure (SCTP_PRINFO)
 *
 *   This cmsghdr structure specifies SCTP options for sendmsg().
 *
 *   cmsg_level    cmsg_type      cmsg_data[]
 *   ------------  ------------   -------------------

Annotation

• Immediate include surface: `linux/types.h`, `linux/socket.h`.
• Detected declarations: `struct sctp_initmsg`, `struct sctp_sndrcvinfo`, `struct sctp_sndinfo`, `struct sctp_rcvinfo`, `struct sctp_nxtinfo`, `struct sctp_prinfo`, `struct sctp_authinfo`, `struct sctp_assoc_change`, `struct sctp_paddr_change`, `struct sctp_remote_error`.
• Atlas domain: Core OS / Core Kernel Interface.
• Implementation status: source implementation candidate.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.