ꦫꦣꦺꦤ꧀ꦄꦤ꧀ꦠꦱꦺꦤ

PATH: usr / include / linux

/*
 * INET		An implementation of the TCP/IP protocol suite for the LINUX
 *		operating system.  INET is implemented using the  BSD Socket
 *		interface as the means of communication with the user level.
 *
 *		Definitions for the TCP protocol.
 *
 * Version:	@(#)tcp.h	1.0.2	04/28/93
 *
 * Author:	Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
 *
 *		This program is free software; you can redistribute it and/or
 *		modify it under the terms of the GNU General Public License
 *		as published by the Free Software Foundation; either version
 *		2 of the License, or (at your option) any later version.
 */
#ifndef _LINUX_TCP_H
#define _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;
};

/*
 *	The union cast uses a gcc extension to avoid aliasing problems
 *  (union is compatible to any of its members)
 *  This means this part of the code is -fstrict-aliasing safe now.
 */
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)
};

/*
 * TCP general constants
 */
#define TCP_MSS_DEFAULT		 536U	/* IPv4 (RFC1122, RFC2581) */
#define TCP_MSS_DESIRED		1220U	/* IPv6 (tunneled), EDNS0 (RFC3226) */

/* TCP socket options */
#define TCP_NODELAY		1	/* Turn off Nagle's algorithm. */
#define TCP_MAXSEG		2	/* Limit MSS */
#define TCP_CORK		3	/* Never send partially complete segments */
#define TCP_KEEPIDLE		4	/* Start keeplives after this period */
#define TCP_KEEPINTVL		5	/* Interval between keepalives */
#define TCP_KEEPCNT		6	/* Number of keepalives before death */
#define TCP_SYNCNT		7	/* Number of SYN retransmits */
#define TCP_LINGER2		8	/* Life time of orphaned FIN-WAIT-2 state */
#define TCP_DEFER_ACCEPT	9	/* Wake up listener only when data arrive */
#define TCP_WINDOW_CLAMP	10	/* Bound advertised window */
#define TCP_INFO		11	/* Information about this connection. */
#define TCP_QUICKACK		12	/* Block/reenable quick acks */
#define TCP_CONGESTION		13	/* Congestion control algorithm */
#define TCP_MD5SIG		14	/* TCP MD5 Signature (RFC2385) */
#define TCP_THIN_LINEAR_TIMEOUTS 16      /* Use linear timeouts for thin streams*/
#define TCP_THIN_DUPACK         17      /* Fast retrans. after 1 dupack */
#define TCP_USER_TIMEOUT	18	/* How long for loss retry before timeout */
#define TCP_REPAIR		19	/* TCP sock is under repair right now */
#define TCP_REPAIR_QUEUE	20
#define TCP_QUEUE_SEQ		21
#define TCP_REPAIR_OPTIONS	22
#define TCP_FASTOPEN		23	/* Enable FastOpen on listeners */
#define TCP_TIMESTAMP		24
#define TCP_NOTSENT_LOWAT	25	/* limit number of unsent bytes in write queue */
#define TCP_REPAIR_WINDOW	29	/* Get/set window parameters */

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,
};

/* for TCP_INFO socket option */
#define TCPI_OPT_TIMESTAMPS	1
#define TCPI_OPT_SACK		2
#define TCPI_OPT_WSCALE		4
#define TCPI_OPT_ECN		8 /* ECN was negociated at TCP session init */
#define TCPI_OPT_ECN_SEEN	16 /* we received at least one packet with ECT */
#define TCPI_OPT_SYN_DATA	32 /* SYN-ACK acked data in SYN sent or rcvd */

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;

__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;

/* Times. */
	__u32	tcpi_last_data_sent;
	__u32	tcpi_last_ack_sent;     /* Not remembered, sorry. */
	__u32	tcpi_last_data_recv;
	__u32	tcpi_last_ack_recv;

/* Metrics. */
	__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;    /* RFC4898 tcpEStatsAppHCThruOctetsAcked */
	__u64	tcpi_bytes_received; /* RFC4898 tcpEStatsAppHCThruOctetsReceived */
	__u32	tcpi_segs_out;	     /* RFC4898 tcpEStatsPerfSegsOut */
	__u32	tcpi_segs_in;	     /* RFC4898 tcpEStatsPerfSegsIn */
};

/* for TCP_MD5SIG socket option */
#define TCP_MD5SIG_MAXKEYLEN	80

struct tcp_md5sig {
	struct __kernel_sockaddr_storage tcpm_addr;	/* address associated */
	__u16	__tcpm_pad1;				/* zero */
	__u16	tcpm_keylen;				/* key length */
	__u32	__tcpm_pad2;				/* zero */
	__u8	tcpm_key[TCP_MD5SIG_MAXKEYLEN];		/* key (binary) */
};

#endif /* _LINUX_TCP_H */

[+] ..
[-] sysinfo.h [edit]
[-] mroute.h [edit]
[-] if_eql.h [edit]
[-] serial_core.h [edit]
[-] membarrier.h [edit]
[-] sched.h [edit]
[-] mei.h [edit]
[-] bfs_fs.h [edit]
[-] atmlec.h [edit]
[-] v4l2-mediabus.h [edit]
[-] videodev2.h [edit]
[-] screen_info.h [edit]
[-] if_slip.h [edit]
[-] uuid.h [edit]
[-] version.h [edit]
[-] ipv6_route.h [edit]
[-] ixjuser.h [edit]
[-] pkt_cls.h [edit]
[-] atm_he.h [edit]
[-] raw.h [edit]
[-] msdos_fs.h [edit]
[-] mman.h [edit]
[-] aio_abi.h [edit]
[-] reboot.h [edit]
[-] snmp.h [edit]
[-] atm_eni.h [edit]
[-] netfilter_bridge.h [edit]
[-] patchkey.h [edit]
[-] string.h [edit]
[-] socket.h [edit]
[+] spi
[-] auxvec.h [edit]
[-] sockios.h [edit]
[-] keyboard.h [edit]
[-] scc.h [edit]
[-] dn.h [edit]
[-] unistd.h [edit]
[-] oom.h [edit]
[-] pkt_sched.h [edit]
[-] if_phonet.h [edit]
[+] byteorder
[-] if_arcnet.h [edit]
[+] caif
[-] fd.h [edit]
[-] radeonfb.h [edit]
[-] qnx4_fs.h [edit]
[-] nfs2.h [edit]
[-] magic.h [edit]
[-] target_core_user.h [edit]
[-] atm_zatm.h [edit]
[-] pci.h [edit]
[-] nfsacl.h [edit]
[-] if_packet.h [edit]
[-] arcfb.h [edit]
[-] nfs_mount.h [edit]
[-] fib_rules.h [edit]
[-] atmsap.h [edit]
[+] dvb
[-] cciss_defs.h [edit]
[+] netfilter_ipv6
[-] atmdev.h [edit]
[-] kexec.h [edit]
[-] ipc.h [edit]
[-] sock_diag.h [edit]
[+] wimax
[-] serial.h [edit]
[-] if_link.h [edit]
[-] route.h [edit]
[-] if_bonding.h [edit]
[-] auto_fs.h [edit]
[-] pg.h [edit]
[-] l2tp.h [edit]
[-] perf_event.h [edit]
[-] tcp_metrics.h [edit]
[-] v4l2-controls.h [edit]
[-] personality.h [edit]
[-] dcbnl.h [edit]
[-] netfilter_arp.h [edit]
[-] toshiba.h [edit]
[-] memfd.h [edit]
[-] resource.h [edit]
[-] tipc.h [edit]
[-] virtio_vsock.h [edit]
[-] atm_tcp.h [edit]
[-] cn_proc.h [edit]
[-] utime.h [edit]
[-] nbd.h [edit]
[-] netfilter_ipv6.h [edit]
[-] meye.h [edit]
[-] gfs2_ondisk.h [edit]
[-] som.h [edit]
[-] ncp_mount.h [edit]
[-] coda.h [edit]
[-] hw_breakpoint.h [edit]
[-] shm.h [edit]
[-] wanrouter.h [edit]
[-] kernel-page-flags.h [edit]
[-] auto_fs4.h [edit]
[-] ppp_defs.h [edit]
[-] tty.h [edit]
[-] sysctl.h [edit]
[-] joystick.h [edit]
[-] ip.h [edit]
[-] jffs2.h [edit]
[-] nfs3.h [edit]
[-] if_infiniband.h [edit]
[-] agpgart.h [edit]
[+] raid
[-] blkpg.h [edit]
[-] virtio_ids.h [edit]
[-] udp.h [edit]
[-] swab.h [edit]
[-] romfs_fs.h [edit]
[-] fb.h [edit]
[-] kvm_para.h [edit]
[-] btrfs.h [edit]
[-] efs_fs_sb.h [edit]
[-] xfrm.h [edit]
[-] iso_fs.h [edit]
[-] serial_reg.h [edit]
[-] virtio_gpu.h [edit]
[-] sound.h [edit]
[-] errno.h [edit]
[-] kernelcapi.h [edit]
[-] net_tstamp.h [edit]
[-] isdnif.h [edit]
[-] hiddev.h [edit]
[-] ncp_fs.h [edit]
[-] hdlc.h [edit]
[-] fcntl.h [edit]
[-] if.h [edit]
[-] minix_fs.h [edit]
[-] hdreg.h [edit]
[-] virtio_9p.h [edit]
[-] coff.h [edit]
[-] elf-em.h [edit]
[-] mqueue.h [edit]
[+] tc_ematch
[-] gameport.h [edit]
[-] if_ether.h [edit]
[-] if_addrlabel.h [edit]
[-] ife.h [edit]
[-] isdn_divertif.h [edit]
[-] rds.h [edit]
[-] fdreg.h [edit]
[-] pmu.h [edit]
[-] cuda.h [edit]
[-] stat.h [edit]
[-] virtio_net.h [edit]
[-] posix_types.h [edit]
[-] cyclades.h [edit]
[-] baycom.h [edit]
[-] ipv6.h [edit]
[-] net_dropmon.h [edit]
[-] ipmi_msgdefs.h [edit]
[+] netfilter_arp
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[-] vsockmon.h [edit]
[-] neighbour.h [edit]
[-] sctp.h [edit]
[-] atmppp.h [edit]
[-] usbdevice_fs.h [edit]
[-] dm-ioctl.h [edit]
[-] netconf.h [edit]
[-] v4l2-dv-timings.h [edit]
[-] chio.h [edit]
[-] msg.h [edit]
[+] netfilter_ipv4
[-] netlink.h [edit]
[-] genetlink.h [edit]
[-] cgroupstats.h [edit]
[-] i8k.h [edit]
[-] cciss_ioctl.h [edit]
[-] major.h [edit]
[-] nfs_fs.h [edit]
[-] rfkill.h [edit]
[-] atm.h [edit]
[-] fuse.h [edit]
[-] fsl_hypervisor.h [edit]
[-] atalk.h [edit]
[-] ivtv.h [edit]
[-] nfs4_mount.h [edit]
[-] pps.h [edit]
[-] nubus.h [edit]
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[-] hpet.h [edit]
[-] atmmpc.h [edit]
[-] fou.h [edit]
[-] dccp.h [edit]
[-] if_pppox.h [edit]
[-] media.h [edit]
[-] dm-log-userspace.h [edit]
[-] ndctl.h [edit]
[-] wmi.h [edit]
[-] timex.h [edit]
[-] mii.h [edit]
[-] kd.h [edit]
[-] if_pppol2tp.h [edit]
[-] uinput.h [edit]
[-] time.h [edit]
[-] fadvise.h [edit]
[-] phonet.h [edit]
[-] dlm_device.h [edit]
[-] bpf_perf_event.h [edit]
[-] quota.h [edit]
[-] ppdev.h [edit]
[-] ivtvfb.h [edit]
[-] if_plip.h [edit]
[-] net_namespace.h [edit]
[-] ipmi.h [edit]
[-] vhost.h [edit]
[-] v4l2-common.h [edit]
[-] ultrasound.h [edit]
[-] lp.h [edit]
[-] wireless.h [edit]
[-] keyctl.h [edit]
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[-] bt-bmc.h [edit]
[-] netrom.h [edit]
[-] rtc.h [edit]
[-] types.h [edit]
[-] qnxtypes.h [edit]
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[-] if_ppp.h [edit]
[-] prctl.h [edit]
[-] firewire-cdev.h [edit]
[-] sdla.h [edit]
[-] atmbr2684.h [edit]
[-] falloc.h [edit]
[-] connector.h [edit]
[+] mmc
[-] rtnetlink.h [edit]
[-] tty_flags.h [edit]
[-] bpf.h [edit]
[-] watchdog.h [edit]
[-] bsg.h [edit]
[-] kernel.h [edit]
[-] reiserfs_fs.h [edit]
[+] can
[-] selinux_netlink.h [edit]
[-] hdlcdrv.h [edit]
[-] filter.h [edit]
[-] hidraw.h [edit]
[-] icmp.h [edit]
[-] uio.h [edit]
[-] if_ltalk.h [edit]
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[-] vtpm_proxy.h [edit]
[-] elfcore.h [edit]
[-] limits.h [edit]
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[-] if_fddi.h [edit]
[-] uvcvideo.h [edit]
[-] ioctl.h [edit]
[-] capi.h [edit]
[-] nvme_ioctl.h [edit]
[-] dlm.h [edit]
[-] tiocl.h [edit]
[-] inotify.h [edit]
[-] poll.h [edit]
[-] rose.h [edit]
[-] if_hippi.h [edit]
[-] matroxfb.h [edit]
[-] i2o-dev.h [edit]
[-] tipc_config.h [edit]
[-] ipsec.h [edit]
[-] dlm_netlink.h [edit]
[-] serio.h [edit]
[-] cdrom.h [edit]
[-] fanotify.h [edit]
[-] virtio_blk.h [edit]
[-] atmioc.h [edit]
[-] securebits.h [edit]
[-] bpf_common.h [edit]
[-] if_team.h [edit]
[-] omapfb.h [edit]
[-] pktcdvd.h [edit]
[-] phantom.h [edit]
[-] atmapi.h [edit]
[-] hyperv.h [edit]
[-] stddef.h [edit]
[-] vt.h [edit]
[-] cycx_cfm.h [edit]
[-] parport.h [edit]
[-] ptrace.h [edit]
[-] nfs.h [edit]
[-] if_bridge.h [edit]
[+] netfilter_bridge
[-] unix_diag.h [edit]
[-] times.h [edit]
[-] n_r3964.h [edit]
[-] nl80211.h [edit]
[-] kvm.h [edit]
[-] virtio_ring.h [edit]
[-] bpqether.h [edit]
[-] ip6_tunnel.h [edit]
[-] sem.h [edit]
[-] llc.h [edit]
[-] omap3isp.h [edit]
[-] virtio_types.h [edit]
[-] xattr.h [edit]
[-] netfilter.h [edit]
[-] edd.h [edit]
[-] inet_diag.h [edit]
[-] vfio.h [edit]
[-] un.h [edit]
[-] termios.h [edit]
[+] usb
[-] firewire-constants.h [edit]
[-] nfs4.h [edit]
[-] atmclip.h [edit]
[-] devlink.h [edit]
[-] ip_vs.h [edit]
[-] nfc.h [edit]
[-] flat.h [edit]
[-] elf.h [edit]
[-] if_x25.h [edit]
[-] mdio.h [edit]
[-] isdn_ppp.h [edit]
[+] isdn
[-] cm4000_cs.h [edit]
[-] nvram.h [edit]
[-] param.h [edit]
[-] dlm_plock.h [edit]
[-] virtio_balloon.h [edit]
[-] telephony.h [edit]
[-] dlmconstants.h [edit]
[-] tcp.h [edit]
[-] futex.h [edit]
[-] virtio_scsi.h [edit]
[-] net.h [edit]
[-] sonypi.h [edit]
[-] wait.h [edit]
[-] apm_bios.h [edit]
[-] if_macsec.h [edit]
[+] hsi
[-] gigaset_dev.h [edit]
[-] capability.h [edit]
[-] errqueue.h [edit]
[+] netfilter
[-] a.out.h [edit]
[-] utsname.h [edit]
[-] gen_stats.h [edit]
[-] kdev_t.h [edit]
[-] if_vlan.h [edit]
[-] lwtunnel.h [edit]
[-] uhid.h [edit]
[-] i2c-dev.h [edit]
[-] wimax.h [edit]
[-] openvswitch.h [edit]
[-] virtio_input.h [edit]
[-] sonet.h [edit]
[+] hdlc
[-] ppp-comp.h [edit]
[-] veth.h [edit]
[-] atmsvc.h [edit]
[-] netlink_diag.h [edit]
[-] hid.h [edit]
[-] const.h [edit]
[-] psample.h [edit]
[-] vm_sockets.h [edit]
[-] i2c.h [edit]
[-] synclink.h [edit]
[-] if_arp.h [edit]
[-] pfkeyv2.h [edit]
[-] virtio_config.h [edit]
[-] if_fc.h [edit]
[-] eventpoll.h [edit]
[-] binfmts.h [edit]
[-] soundcard.h [edit]
[-] in6.h [edit]
[-] b1lli.h [edit]
[-] suspend_ioctls.h [edit]
[-] loop.h [edit]
[-] seccomp.h [edit]
[-] blktrace_api.h [edit]
[-] adfs_fs.h [edit]
[-] netdevice.h [edit]
[-] virtio_console.h [edit]
[-] dqblk_xfs.h [edit]
[-] netfilter_decnet.h [edit]
[-] mmtimer.h [edit]
[-] can.h [edit]
[-] adb.h [edit]
[-] acct.h [edit]
[-] ax25.h [edit]
[-] coda_psdev.h [edit]
[-] elf-fdpic.h [edit]
[-] virtio_rng.h [edit]
[-] signal.h [edit]
[-] libc-compat.h [edit]
[-] taskstats.h [edit]
[-] ncp_no.h [edit]
[-] ipx.h [edit]
[-] userfaultfd.h [edit]
[-] mempolicy.h [edit]
[-] icmpv6.h [edit]
[-] atmarp.h [edit]
[-] if_frad.h [edit]
[-] signalfd.h [edit]
[-] irda.h [edit]
[-] fiemap.h [edit]
[-] virtio_pci.h [edit]
[-] if_cablemodem.h [edit]
[-] in_route.h [edit]
[-] mpls.h [edit]
[-] input.h [edit]
[-] nfs_idmap.h [edit]
[-] cramfs_fs.h [edit]
[-] ptp_clock.h [edit]
[-] audit.h [edit]
[-] if_tun.h [edit]
[-] igmp.h [edit]
[-] if_alg.h [edit]
[-] random.h [edit]
[-] netfilter_ipv4.h [edit]
[-] atm_nicstar.h [edit]
[-] packet_diag.h [edit]
[-] x25.h [edit]
[+] tc_act
[-] in.h [edit]
[-] irqnr.h [edit]
[-] ncp.h [edit]
[-] reiserfs_xattr.h [edit]
[+] iio
[-] fs.h [edit]
[-] map_to_7segment.h [edit]
[+] sunrpc
[-] if_addr.h [edit]
[-] mtio.h [edit]
[+] nfsd
[-] hysdn_if.h [edit]
[-] pci_regs.h [edit]
[-] mroute6.h [edit]
[-] isdn.h [edit]
[-] udf_fs_i.h [edit]