TCP protocol definitions. More...

#include <sys/types.h>
#include <stdint.h>

Include dependency graph for tcp.h:

This graph shows which files directly or indirectly include this file:

Data Structures
struct	tcphdr
	TCP protocol header structure. More...
struct	_TCPPSEUDOHDR
	TCP pseudo header structure. More...
Defines
#define	TH_FIN 0x01
	Finishing transmission.
#define	TH_SYN 0x02
	Synchronizing sequence numbers.
#define	TH_RST 0x04
	Reset connection.
#define	TH_PUSH 0x08
	Push data to application level.
#define	TH_ACK 0x10
	Acknowledge field is valid.
#define	TH_URG 0x20
	Urgent data present.
#define	TH_FLAGS (TH_FIN \| TH_SYN \| TH_RST \| TH_ACK \| TH_URG)
	TCP flag mask.
#define	TCPOPT_EOL 0
	End of options.
#define	TCPOPT_NOP 1
	Nothing.
#define	TCPOPT_MAXSEG 2
	Maximum segment size.
#define	TCPOLEN_MAXSEG 4
	Maximum segment size length.
#define	TCPOPT_WINDOW 3
	Receive window.
#define	TCPOLEN_WINDOW 3
	Receive window length.
#define	TCP_MSS 536
	Default maximum segment size. The maximum size of an IP datagram, that will not become fragmented, is 576. The maximum IP datagram for Ethernet is 1500. Reduce this number by 40, 20 bytes TCP header and 20 bytes IP header.
#define	TCP_WINSIZE 3216
	Default window size. It's recommended to set this 6 times the maximum segment size.
#define	TCP_MAXWIN 65535
	Largest value for (unscaled) window.
#define	TTCP_CLIENT_SND_WND 4096
	Default send window for T/TCP client.
#define	TCP_MAX_WINSHIFT 14
	Maximum window shift.
#define	TCP_MAXHLEN (0xf<<2)
	Maximum length of header in bytes.
#define	TCP_MAXOLEN (TCP_MAXHLEN - sizeof(struct tcphdr))
	Maximum space left for options.
#define	TCP_NODELAY 0x01
	Don't delay send to coalesce segments.
#define	TCP_MAXSEG 0x02
	Set maximum segment size.
#define	TCP_NOPUSH 0x04
	Don't push last block of write.
#define	TCP_NOOPT 0x08
	Don't use TCP options.
Typedefs
typedef struct tcphdr	TCPHDR
	TCP protocol header type.
typedef struct _TCPPSEUDOHDR	TCPPSEUDOHDR
	TCP pseudo header type.

Detailed Description

TCP protocol definitions.

Definition in file tcp.h.

Define Documentation

#define TH_FIN 0x01

Finishing transmission.

Definition at line 126 of file tcp.h.

Referenced by NutDumpTcpHeader(), and NutTcpOutput().

#define TH_SYN 0x02

Synchronizing sequence numbers.

Definition at line 127 of file tcp.h.

Referenced by NutDumpTcpHeader(), NutTcpOutput(), and NutTcpReject().

#define TH_RST 0x04

Reset connection.

Definition at line 128 of file tcp.h.

Referenced by NutDumpTcpHeader(), and NutTcpReject().

#define TH_PUSH 0x08

Push data to application level.

Definition at line 129 of file tcp.h.

Referenced by NutDumpTcpHeader(), and NutTcpOutput().

#define TH_ACK 0x10

Acknowledge field is valid.

Definition at line 130 of file tcp.h.

Referenced by NutDumpTcpHeader(), NutTcpOutput(), and NutTcpReject().

#define TH_URG 0x20

Urgent data present.

Definition at line 131 of file tcp.h.

Referenced by NutDumpTcpHeader().

#define TH_FLAGS (TH_FIN | TH_SYN | TH_RST | TH_ACK | TH_URG)

TCP flag mask.

Definition at line 134 of file tcp.h.

#define TCPOPT_EOL 0

End of options.

Definition at line 167 of file tcp.h.

#define TCPOPT_NOP 1

Nothing.

Definition at line 168 of file tcp.h.

#define TCPOPT_MAXSEG 2

Maximum segment size.

Definition at line 169 of file tcp.h.

Referenced by NutTcpOutput().

#define TCPOLEN_MAXSEG 4

Maximum segment size length.

Definition at line 170 of file tcp.h.

Referenced by NutTcpOutput().

#define TCPOPT_WINDOW 3

Receive window.

Definition at line 171 of file tcp.h.

#define TCPOLEN_WINDOW 3

Receive window length.

Definition at line 172 of file tcp.h.

#define TCP_MSS 536

Default maximum segment size. The maximum size of an IP datagram, that will not become fragmented, is 576. The maximum IP datagram for Ethernet is 1500. Reduce this number by 40, 20 bytes TCP header and 20 bytes IP header.

Definition at line 192 of file tcp.h.

Referenced by NutTcpCreateSocket().

#define TCP_WINSIZE 3216

Default window size. It's recommended to set this 6 times the maximum segment size.

Definition at line 200 of file tcp.h.

Referenced by NutTcpCreateSocket().

#define TCP_MAXWIN 65535

Largest value for (unscaled) window.

Definition at line 206 of file tcp.h.

#define TTCP_CLIENT_SND_WND 4096

Default send window for T/TCP client.

Definition at line 207 of file tcp.h.

#define TCP_MAX_WINSHIFT 14

Maximum window shift.

Definition at line 209 of file tcp.h.

#define TCP_MAXHLEN (0xf<<2)

Maximum length of header in bytes.

Definition at line 211 of file tcp.h.

#define TCP_MAXOLEN (TCP_MAXHLEN - sizeof(struct tcphdr))

Maximum space left for options.

Definition at line 212 of file tcp.h.

#define TCP_NODELAY 0x01

Don't delay send to coalesce segments.

Definition at line 217 of file tcp.h.

#define TCP_MAXSEG 0x02

Set maximum segment size.

Examples:: ftpd/ftpserv.c.

Definition at line 218 of file tcp.h.

Referenced by NutFtpDataConnect(), NutTcpGetSockOpt(), and NutTcpSetSockOpt().

#define TCP_NOPUSH 0x04

Don't push last block of write.

Definition at line 219 of file tcp.h.

#define TCP_NOOPT 0x08

Don't use TCP options.

Definition at line 220 of file tcp.h.

Typedef Documentation

TCPHDR

TCP protocol header type.

TCPPSEUDOHDR

TCP pseudo header type.

Data Structures

Defines

Typedefs

Detailed Description

Define Documentation

Typedef Documentation