TCP options

Data Structures
struct	tcp_option
	Generic TCP option. More...
struct	tcp_mss_option
	TCP MSS option. More...
struct	tcp_window_scale_option
	TCP window scale option. More...
struct	tcp_window_scale_padded_option
	Padded TCP window scale option (used for sending) More...
struct	tcp_sack_permitted_option
	TCP selective acknowledgement permitted option. More...
struct	tcp_sack_permitted_padded_option
	Padded TCP selective acknowledgement permitted option (used for sending) More...
struct	tcp_sack_option
	TCP selective acknowledgement option. More...
struct	tcp_sack_block
	TCP selective acknowledgement block. More...
struct	tcp_sack_padded_option
	Padded TCP selective acknowledgement option (used for sending) More...
struct	tcp_timestamp_option
	TCP timestamp option. More...
struct	tcp_timestamp_padded_option
	Padded TCP timestamp option (used for sending) More...
struct	tcp_options
	Parsed TCP options. More...

Macros
#define	TCP_OPTION_END   0
	End of TCP options list.
#define	TCP_OPTION_NOP   1
	TCP option pad.
#define	TCP_OPTION_MSS   2
	Code for the TCP MSS option.
#define	TCP_OPTION_WS   3
	Code for the TCP window scale option.
#define	TCP_RX_WINDOW_SCALE   9
	Advertised TCP window scale.
#define	TCP_OPTION_SACK_PERMITTED   4
	Code for the TCP selective acknowledgement permitted option.
#define	TCP_SACK_MAX   3
	Maximum number of selective acknowledgement blocks.
#define	TCP_OPTION_SACK   5
	Code for the TCP selective acknowledgement option.
#define	TCP_OPTION_TS   8
	Code for the TCP timestamp option.

Functions
struct tcp_window_scale_padded_option	__attribute ((packed))

Variables
struct tcp_sack_permitted_option	__attribute

Detailed Description

Macro Definition Documentation

TCP_OPTION_END

#define TCP_OPTION_END   0

End of TCP options list.

Definition at line 37 of file tcp.h.

Referenced by tcp_rx_opts().

TCP_OPTION_NOP

#define TCP_OPTION_NOP   1

TCP option pad.

Definition at line 40 of file tcp.h.

Referenced by tcp_rx_opts(), and tcp_xmit_sack().

TCP_OPTION_MSS

#define TCP_OPTION_MSS   2

Code for the TCP MSS option.

Definition at line 56 of file tcp.h.

Referenced by tcp_rx_opts(), and tcp_xmit_sack().

TCP_OPTION_WS

#define TCP_OPTION_WS   3

Code for the TCP window scale option.

Definition at line 72 of file tcp.h.

Referenced by tcp_rx_opts(), and tcp_xmit_sack().

TCP_RX_WINDOW_SCALE

#define TCP_RX_WINDOW_SCALE   9

Advertised TCP window scale.

Using a scale factor of 2**9 provides for a maximum window of 32MB, which is sufficient to allow Gigabit-speed transfers with a 200ms RTT. The minimum advertised window is 512 bytes, which is still less than a single packet.

Definition at line 81 of file tcp.h.

Referenced by tcp_rx_syn(), and tcp_xmit_sack().

TCP_OPTION_SACK_PERMITTED

#define TCP_OPTION_SACK_PERMITTED   4

Code for the TCP selective acknowledgement permitted option.

Definition at line 96 of file tcp.h.

Referenced by tcp_rx_opts(), and tcp_xmit_sack().

TCP_SACK_MAX

#define TCP_SACK_MAX   3

Maximum number of selective acknowledgement blocks.

This allows for the presence of the TCP timestamp option.

Definition at line 114 of file tcp.h.

Referenced by tcp_rx_seq(), and tcp_sack().

TCP_OPTION_SACK

#define TCP_OPTION_SACK   5

Code for the TCP selective acknowledgement option.

Definition at line 123 of file tcp.h.

Referenced by tcp_rx_opts(), and tcp_xmit_sack().

TCP_OPTION_TS

#define TCP_OPTION_TS   8

Code for the TCP timestamp option.

Definition at line 140 of file tcp.h.

Referenced by tcp_rx_opts(), and tcp_xmit_sack().

Function Documentation

__attribute()

struct tcp_window_scale_padded_option __attribute

(

(packed)

)

Variable Documentation

__attribute

struct tcp_sack_permitted_option __attribute