/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */

#ifndef _UAPI_LINUX_TCP_H
#define _UAPI_LINUX_TCP_H

#include <linux/types.h>
#include <asm/byteorder.h>
#include <linux/socket.h>

struct tcphdr {
	__be16	source;
	__be16	dest;
	__be32	seq;
	__be32	ack_seq;
#if defined(__LITTLE_ENDIAN_BITFIELD)
	__u16	res1:4,
		doff:4,
		fin:1,
		syn:1,
		rst:1,
		psh:1,
		ack:1,
		urg:1,
		ece:1,
		cwr:1;
#elif defined(__BIG_ENDIAN_BITFIELD)
	__u16	doff:4,
		res1:4,
		cwr:1,
		ece:1,
		urg:1,
		ack:1,
		psh:1,
		rst:1,
		syn:1,
		fin:1;
#else
#error	"Adjust your <asm/byteorder.h> defines"
#endif
	__be16	window;
	__sum16	check;
	__be16	urg_ptr;
};


union tcp_word_hdr {
	struct tcphdr hdr;
	__be32        words[5];
};

#define tcp_flag_word(tp) (((union tcp_word_hdr *)(tp))->words[3])

enum {
	TCP_FLAG_CWR = __constant_cpu_to_be32(0x00800000),
	TCP_FLAG_ECE = __constant_cpu_to_be32(0x00400000),
	TCP_FLAG_URG = __constant_cpu_to_be32(0x00200000),
	TCP_FLAG_ACK = __constant_cpu_to_be32(0x00100000),
	TCP_FLAG_PSH = __constant_cpu_to_be32(0x00080000),
	TCP_FLAG_RST = __constant_cpu_to_be32(0x00040000),
	TCP_FLAG_SYN = __constant_cpu_to_be32(0x00020000),
	TCP_FLAG_FIN = __constant_cpu_to_be32(0x00010000),
	TCP_RESERVED_BITS = __constant_cpu_to_be32(0x0F000000),
	TCP_DATA_OFFSET = __constant_cpu_to_be32(0xF0000000)
};


#define TCP_MSS_DEFAULT		 536U	
#define TCP_MSS_DESIRED		1220U	


#define TCP_NODELAY		1	
#define TCP_MAXSEG		2	
#define TCP_CORK		3	
#define TCP_KEEPIDLE		4	
#define TCP_KEEPINTVL		5	
#define TCP_KEEPCNT		6	
#define TCP_SYNCNT		7	
#define TCP_LINGER2		8	
#define TCP_DEFER_ACCEPT	9	
#define TCP_WINDOW_CLAMP	10	
#define TCP_INFO		11	
#define TCP_QUICKACK		12	
#define TCP_CONGESTION		13	
#define TCP_MD5SIG		14	
#define TCP_THIN_LINEAR_TIMEOUTS 16	
#define TCP_THIN_DUPACK		17	
#define TCP_USER_TIMEOUT	18	
#define TCP_REPAIR		19	
#define TCP_REPAIR_QUEUE	20
#define TCP_QUEUE_SEQ		21
#define TCP_REPAIR_OPTIONS	22
#define TCP_FASTOPEN		23	
#define TCP_TIMESTAMP		24
#define TCP_NOTSENT_LOWAT	25	
#define TCP_CC_INFO		26	
#define TCP_SAVE_SYN		27	
#define TCP_SAVED_SYN		28	
#define TCP_REPAIR_WINDOW	29	
#define TCP_FASTOPEN_CONNECT	30	
#define TCP_ULP			31	
#define TCP_MD5SIG_EXT		32	
#define TCP_FASTOPEN_KEY	33	
#define TCP_FASTOPEN_NO_COOKIE	34	
#define TCP_ZEROCOPY_RECEIVE	35
#define TCP_INQ			36	

#define TCP_CM_INQ		TCP_INQ

#define TCP_TX_DELAY		37	


#define TCP_REPAIR_ON		1
#define TCP_REPAIR_OFF		0
#define TCP_REPAIR_OFF_NO_WP	-1	

struct tcp_repair_opt {
	__u32	opt_code;
	__u32	opt_val;
};

struct tcp_repair_window {
	__u32	snd_wl1;
	__u32	snd_wnd;
	__u32	max_window;

	__u32	rcv_wnd;
	__u32	rcv_wup;
};

enum {
	TCP_NO_QUEUE,
	TCP_RECV_QUEUE,
	TCP_SEND_QUEUE,
	TCP_QUEUES_NR,
};


enum tcp_fastopen_client_fail {
	TFO_STATUS_UNSPEC, 
	TFO_COOKIE_UNAVAILABLE, 
	TFO_DATA_NOT_ACKED, 
	TFO_SYN_RETRANSMITTED, 
};


#define TCPI_OPT_TIMESTAMPS	1
#define TCPI_OPT_SACK		2
#define TCPI_OPT_WSCALE		4
#define TCPI_OPT_ECN		8 
#define TCPI_OPT_ECN_SEEN	16 
#define TCPI_OPT_SYN_DATA	32 


enum tcp_ca_state {
	
	TCP_CA_Open = 0,
#define TCPF_CA_Open	(1<<TCP_CA_Open)
	
	TCP_CA_Disorder = 1,
#define TCPF_CA_Disorder (1<<TCP_CA_Disorder)
	
	TCP_CA_CWR = 2,
#define TCPF_CA_CWR	(1<<TCP_CA_CWR)
	
	TCP_CA_Recovery = 3,
#define TCPF_CA_Recovery (1<<TCP_CA_Recovery)
	
	TCP_CA_Loss = 4
#define TCPF_CA_Loss	(1<<TCP_CA_Loss)
};

struct tcp_info {
	__u8	tcpi_state;
	__u8	tcpi_ca_state;
	__u8	tcpi_retransmits;
	__u8	tcpi_probes;
	__u8	tcpi_backoff;
	__u8	tcpi_options;
	__u8	tcpi_snd_wscale : 4, tcpi_rcv_wscale : 4;
	__u8	tcpi_delivery_rate_app_limited:1, tcpi_fastopen_client_fail:2;

	__u32	tcpi_rto;
	__u32	tcpi_ato;
	__u32	tcpi_snd_mss;
	__u32	tcpi_rcv_mss;

	__u32	tcpi_unacked;
	__u32	tcpi_sacked;
	__u32	tcpi_lost;
	__u32	tcpi_retrans;
	__u32	tcpi_fackets;

	
	__u32	tcpi_last_data_sent;
	__u32	tcpi_last_ack_sent;     
	__u32	tcpi_last_data_recv;
	__u32	tcpi_last_ack_recv;

	
	__u32	tcpi_pmtu;
	__u32	tcpi_rcv_ssthresh;
	__u32	tcpi_rtt;
	__u32	tcpi_rttvar;
	__u32	tcpi_snd_ssthresh;
	__u32	tcpi_snd_cwnd;
	__u32	tcpi_advmss;
	__u32	tcpi_reordering;

	__u32	tcpi_rcv_rtt;
	__u32	tcpi_rcv_space;

	__u32	tcpi_total_retrans;

	__u64	tcpi_pacing_rate;
	__u64	tcpi_max_pacing_rate;
	__u64	tcpi_bytes_acked;    
	__u64	tcpi_bytes_received; 
	__u32	tcpi_segs_out;	     
	__u32	tcpi_segs_in;	     

	__u32	tcpi_notsent_bytes;
	__u32	tcpi_min_rtt;
	__u32	tcpi_data_segs_in;	
	__u32	tcpi_data_segs_out;	

	__u64   tcpi_delivery_rate;

	__u64	tcpi_busy_time;      
	__u64	tcpi_rwnd_limited;   
	__u64	tcpi_sndbuf_limited; 

	__u32	tcpi_delivered;
	__u32	tcpi_delivered_ce;

	__u64	tcpi_bytes_sent;     
	__u64	tcpi_bytes_retrans;  
	__u32	tcpi_dsack_dups;     
	__u32	tcpi_reord_seen;     

	__u32	tcpi_rcv_ooopack;    

	__u32	tcpi_snd_wnd;	     
};


enum {
	TCP_NLA_PAD,
	TCP_NLA_BUSY,		
	TCP_NLA_RWND_LIMITED,	
	TCP_NLA_SNDBUF_LIMITED,	
	TCP_NLA_DATA_SEGS_OUT,	
	TCP_NLA_TOTAL_RETRANS,	
	TCP_NLA_PACING_RATE,    
	TCP_NLA_DELIVERY_RATE,  
	TCP_NLA_SND_CWND,       
	TCP_NLA_REORDERING,     
	TCP_NLA_MIN_RTT,        
	TCP_NLA_RECUR_RETRANS,  
	TCP_NLA_DELIVERY_RATE_APP_LMT, 
	TCP_NLA_SNDQ_SIZE,	
	TCP_NLA_CA_STATE,	
	TCP_NLA_SND_SSTHRESH,	
	TCP_NLA_DELIVERED,	
	TCP_NLA_DELIVERED_CE,	
	TCP_NLA_BYTES_SENT,	
	TCP_NLA_BYTES_RETRANS,	
	TCP_NLA_DSACK_DUPS,	
	TCP_NLA_REORD_SEEN,	
	TCP_NLA_SRTT,		
	TCP_NLA_TIMEOUT_REHASH, 
	TCP_NLA_BYTES_NOTSENT,	
	TCP_NLA_EDT,		
	TCP_NLA_TTL,		
};


#define TCP_MD5SIG_MAXKEYLEN	80


#define TCP_MD5SIG_FLAG_PREFIX		0x1	
#define TCP_MD5SIG_FLAG_IFINDEX		0x2	

struct tcp_md5sig {
	struct __kernel_sockaddr_storage tcpm_addr;	
	__u8	tcpm_flags;				
	__u8	tcpm_prefixlen;				
	__u16	tcpm_keylen;				
	int	tcpm_ifindex;				
	__u8	tcpm_key[TCP_MD5SIG_MAXKEYLEN];		
};


struct tcp_diag_md5sig {
	__u8	tcpm_family;
	__u8	tcpm_prefixlen;
	__u16	tcpm_keylen;
	__be32	tcpm_addr[4];
	__u8	tcpm_key[TCP_MD5SIG_MAXKEYLEN];
};



#define TCP_RECEIVE_ZEROCOPY_FLAG_TLB_CLEAN_HINT 0x1
struct tcp_zerocopy_receive {
	__u64 address;		
	__u32 length;		
	__u32 recv_skip_hint;	
	__u32 inq; 
	__s32 err; 
	__u64 copybuf_address;	
	__s32 copybuf_len; 
	__u32 flags; 
	__u64 msg_control; 
	__u64 msg_controllen;
	__u32 msg_flags;
	__u32 reserved; 
};
#endif 
