Quelle mptcp.h Sprache: C

/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
#ifndef _UAPI_MPTCP_H
#define _UAPI_MPTCP_H

#ifndef __KERNEL__
#include <netinet/in.h>  /* for sockaddr_in and sockaddr_in6 */
#include <sys/socket.h>  /* for struct sockaddr */
#endif

#include <linux/const.h>
#include <linux/types.h>
#include <linux/in.h>  /* for sockaddr_in */
#include <linux/in6.h>  /* for sockaddr_in6 */
#include <linux/socket.h> /* for sockaddr_storage and sa_family */

#define MPTCP_SUBFLOW_FLAG_MCAP_REM  _BITUL(0)
#define MPTCP_SUBFLOW_FLAG_MCAP_LOC  _BITUL(1)
#define MPTCP_SUBFLOW_FLAG_JOIN_REM  _BITUL(2)
#define MPTCP_SUBFLOW_FLAG_JOIN_LOC  _BITUL(3)
#define MPTCP_SUBFLOW_FLAG_BKUP_REM  _BITUL(4)
#define MPTCP_SUBFLOW_FLAG_BKUP_LOC  _BITUL(5)
#define MPTCP_SUBFLOW_FLAG_FULLY_ESTABLISHED _BITUL(6)
#define MPTCP_SUBFLOW_FLAG_CONNECTED  _BITUL(7)
#define MPTCP_SUBFLOW_FLAG_MAPVALID  _BITUL(8)

#define MPTCP_PM_CMD_GRP_NAME "mptcp_pm_cmds"
#define MPTCP_PM_EV_GRP_NAME "mptcp_pm_events"

#include <linux/mptcp_pm.h>

#define MPTCP_INFO_FLAG_FALLBACK  _BITUL(0)
#define MPTCP_INFO_FLAG_REMOTE_KEY_RECEIVED _BITUL(1)

#define MPTCP_PM_EV_FLAG_DENY_JOIN_ID0  _BITUL(0)

#define MPTCP_PM_ADDR_FLAG_SIGNAL                      (1 << 0)
#define MPTCP_PM_ADDR_FLAG_SUBFLOW                     (1 << 1)
#define MPTCP_PM_ADDR_FLAG_BACKUP                      (1 << 2)
#define MPTCP_PM_ADDR_FLAG_FULLMESH                    (1 << 3)
#define MPTCP_PM_ADDR_FLAG_IMPLICIT                    (1 << 4)

struct mptcp_info {
__u8 mptcpi_subflows;
__u8 mptcpi_add_addr_signal;
__u8 mptcpi_add_addr_accepted;
__u8 mptcpi_subflows_max;
__u8 mptcpi_add_addr_signal_max;
__u8 mptcpi_add_addr_accepted_max;
__u32 mptcpi_flags;
__u32 mptcpi_token;
__u64 mptcpi_write_seq;
__u64 mptcpi_snd_una;
__u64 mptcpi_rcv_nxt;
__u8 mptcpi_local_addr_used;
__u8 mptcpi_local_addr_max;
__u8 mptcpi_csum_enabled;
__u32 mptcpi_retransmits;
__u64 mptcpi_bytes_retrans;
__u64 mptcpi_bytes_sent;
__u64 mptcpi_bytes_received;
__u64 mptcpi_bytes_acked;
__u8 mptcpi_subflows_total;
__u8 reserved[3];
__u32 mptcpi_last_data_sent;
__u32 mptcpi_last_data_recv;
__u32 mptcpi_last_ack_recv;
};

/* MPTCP Reset reason codes, rfc8684 */
#define MPTCP_RST_EUNSPEC 0
#define MPTCP_RST_EMPTCP 1
#define MPTCP_RST_ERESOURCE 2
#define MPTCP_RST_EPROHIBIT 3
#define MPTCP_RST_EWQ2BIG 4
#define MPTCP_RST_EBADPERF 5
#define MPTCP_RST_EMIDDLEBOX 6

struct mptcp_subflow_data {
__u32  size_subflow_data;  /* size of this structure in userspace */
__u32  num_subflows;   /* must be 0, set by kernel */
__u32  size_kernel;   /* must be 0, set by kernel */
__u32  size_user;   /* size of one element in data[] */
} __attribute__((aligned(8)));

struct mptcp_subflow_addrs {
union {
  __kernel_sa_family_t sa_family;
  struct sockaddr sa_local;
  struct sockaddr_in sin_local;
  struct sockaddr_in6 sin6_local;
  struct __kernel_sockaddr_storage ss_local;
};
union {
  struct sockaddr sa_remote;
  struct sockaddr_in sin_remote;
  struct sockaddr_in6 sin6_remote;
  struct __kernel_sockaddr_storage ss_remote;
};
};

struct mptcp_subflow_info {
__u32    id;
struct mptcp_subflow_addrs addrs;
};

struct mptcp_full_info {
__u32  size_tcpinfo_kernel; /* must be 0, set by kernel */
__u32  size_tcpinfo_user;
__u32  size_sfinfo_kernel; /* must be 0, set by kernel */
__u32  size_sfinfo_user;
__u32  num_subflows;  /* must be 0, set by kernel (real subflow count) */
__u32  size_arrays_user; /* max subflows that userspace is interested in;
* the buffers at subflow_info/tcp_info
* are respectively at least:
*  size_arrays * size_sfinfo_user
*  size_arrays * size_tcpinfo_user
* bytes wide
*/
__aligned_u64  subflow_info;
__aligned_u64  tcp_info;
struct mptcp_info mptcp_info;
};

/* MPTCP socket options */
#define MPTCP_INFO  1
#define MPTCP_TCPINFO  2
#define MPTCP_SUBFLOW_ADDRS 3
#define MPTCP_FULL_INFO  4

#endif /* _UAPI_MPTCP_H */

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