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The C and C++ Include Header Files

/usr/include/linux/mptcp.h


$ cat -n /usr/include/linux/mptcp.h

     1	/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
     2	#ifndef _MPTCP_H
     3	#define _MPTCP_H
     4	
     5	#include <netinet/in.h>		/* for sockaddr_in and sockaddr_in6	*/
     6	#include <sys/socket.h>		/* for struct sockaddr			*/
     7	
     8	#include <linux/const.h>
     9	#include <linux/types.h>
    10	#include <linux/in.h>		/* for sockaddr_in			*/
    11	#include <linux/in6.h>		/* for sockaddr_in6			*/
    12	#include <linux/socket.h>	/* for sockaddr_storage and sa_family	*/
    13	
    14	#define MPTCP_SUBFLOW_FLAG_MCAP_REM		_BITUL(0)
    15	#define MPTCP_SUBFLOW_FLAG_MCAP_LOC		_BITUL(1)
    16	#define MPTCP_SUBFLOW_FLAG_JOIN_REM		_BITUL(2)
    17	#define MPTCP_SUBFLOW_FLAG_JOIN_LOC		_BITUL(3)
    18	#define MPTCP_SUBFLOW_FLAG_BKUP_REM		_BITUL(4)
    19	#define MPTCP_SUBFLOW_FLAG_BKUP_LOC		_BITUL(5)
    20	#define MPTCP_SUBFLOW_FLAG_FULLY_ESTABLISHED	_BITUL(6)
    21	#define MPTCP_SUBFLOW_FLAG_CONNECTED		_BITUL(7)
    22	#define MPTCP_SUBFLOW_FLAG_MAPVALID		_BITUL(8)
    23	
    24	#define MPTCP_PM_CMD_GRP_NAME	"mptcp_pm_cmds"
    25	#define MPTCP_PM_EV_GRP_NAME	"mptcp_pm_events"
    26	
    27	#include <linux/mptcp_pm.h>
    28	
    29	#define MPTCP_INFO_FLAG_FALLBACK		_BITUL(0)
    30	#define MPTCP_INFO_FLAG_REMOTE_KEY_RECEIVED	_BITUL(1)
    31	
    32	#define MPTCP_PM_ADDR_FLAG_SIGNAL                      (1 << 0)
    33	#define MPTCP_PM_ADDR_FLAG_SUBFLOW                     (1 << 1)
    34	#define MPTCP_PM_ADDR_FLAG_BACKUP                      (1 << 2)
    35	#define MPTCP_PM_ADDR_FLAG_FULLMESH                    (1 << 3)
    36	#define MPTCP_PM_ADDR_FLAG_IMPLICIT                    (1 << 4)
    37	
    38	struct mptcp_info {
    39		__u8	mptcpi_subflows;
    40		__u8	mptcpi_add_addr_signal;
    41		__u8	mptcpi_add_addr_accepted;
    42		__u8	mptcpi_subflows_max;
    43		__u8	mptcpi_add_addr_signal_max;
    44		__u8	mptcpi_add_addr_accepted_max;
    45		__u32	mptcpi_flags;
    46		__u32	mptcpi_token;
    47		__u64	mptcpi_write_seq;
    48		__u64	mptcpi_snd_una;
    49		__u64	mptcpi_rcv_nxt;
    50		__u8	mptcpi_local_addr_used;
    51		__u8	mptcpi_local_addr_max;
    52		__u8	mptcpi_csum_enabled;
    53		__u32	mptcpi_retransmits;
    54		__u64	mptcpi_bytes_retrans;
    55		__u64	mptcpi_bytes_sent;
    56		__u64	mptcpi_bytes_received;
    57		__u64	mptcpi_bytes_acked;
    58		__u8	mptcpi_subflows_total;
    59	};
    60	
    61	/* MPTCP Reset reason codes, rfc8684 */
    62	#define MPTCP_RST_EUNSPEC	0
    63	#define MPTCP_RST_EMPTCP	1
    64	#define MPTCP_RST_ERESOURCE	2
    65	#define MPTCP_RST_EPROHIBIT	3
    66	#define MPTCP_RST_EWQ2BIG	4
    67	#define MPTCP_RST_EBADPERF	5
    68	#define MPTCP_RST_EMIDDLEBOX	6
    69	
    70	struct mptcp_subflow_data {
    71		__u32		size_subflow_data;		/* size of this structure in userspace */
    72		__u32		num_subflows;			/* must be 0, set by kernel */
    73		__u32		size_kernel;			/* must be 0, set by kernel */
    74		__u32		size_user;			/* size of one element in data[] */
    75	} __attribute__((aligned(8)));
    76	
    77	struct mptcp_subflow_addrs {
    78		union {
    79			__kernel_sa_family_t sa_family;
    80			struct sockaddr sa_local;
    81			struct sockaddr_in sin_local;
    82			struct sockaddr_in6 sin6_local;
    83			struct __kernel_sockaddr_storage ss_local;
    84		};
    85		union {
    86			struct sockaddr sa_remote;
    87			struct sockaddr_in sin_remote;
    88			struct sockaddr_in6 sin6_remote;
    89			struct __kernel_sockaddr_storage ss_remote;
    90		};
    91	};
    92	
    93	struct mptcp_subflow_info {
    94		__u32				id;
    95		struct mptcp_subflow_addrs	addrs;
    96	};
    97	
    98	struct mptcp_full_info {
    99		__u32		size_tcpinfo_kernel;	/* must be 0, set by kernel */
   100		__u32		size_tcpinfo_user;
   101		__u32		size_sfinfo_kernel;	/* must be 0, set by kernel */
   102		__u32		size_sfinfo_user;
   103		__u32		num_subflows;		/* must be 0, set by kernel (real subflow count) */
   104		__u32		size_arrays_user;	/* max subflows that userspace is interested in;
   105							 * the buffers at subflow_info/tcp_info
   106							 * are respectively at least:
   107							 *  size_arrays * size_sfinfo_user
   108							 *  size_arrays * size_tcpinfo_user
   109							 * bytes wide
   110							 */
   111		__aligned_u64		subflow_info;
   112		__aligned_u64		tcp_info;
   113		struct mptcp_info	mptcp_info;
   114	};
   115	
   116	/* MPTCP socket options */
   117	#define MPTCP_INFO		1
   118	#define MPTCP_TCPINFO		2
   119	#define MPTCP_SUBFLOW_ADDRS	3
   120	#define MPTCP_FULL_INFO		4
   121	
   122	#endif /* _MPTCP_H */