Include dependency graph for tcp_packet.h:

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

Data Structures
struct	tcp_options_t

Macros
#define	foreach_tcp_flag
	Sender reduced congestion window. More...

#define	tcp_doff(_th) ((_th)->data_offset_and_reserved >> 4)

#define	tcp_fin(_th) ((_th)->flags & TCP_FLAG_FIN)

#define	tcp_syn(_th) ((_th)->flags & TCP_FLAG_SYN)

#define	tcp_rst(_th) ((_th)->flags & TCP_FLAG_RST)

#define	tcp_psh(_th) ((_th)->flags & TCP_FLAG_PSH)

#define	tcp_ack(_th) ((_th)->flags & TCP_FLAG_ACK)

#define	tcp_urg(_th) ((_th)->flags & TCP_FLAG_URG)

#define	tcp_ece(_th) ((_th)->flags & TCP_FLAG_ECE)

#define	tcp_cwr(_th) ((_th)->flags & TCP_FLAG_CWR)

#define	tcp_is_syn(_th) !!((_th)->flags & TCP_FLAG_SYN)

#define	tcp_is_fin(_th) !!((_th)->flags & TCP_FLAG_FIN)

#define	foreach_tcp_options_flag
	SACK present. More...

#define	tcp_opts_mss(_to) ((_to)->flags & TCP_OPTS_FLAG_MSS)

#define	tcp_opts_tstamp(_to) ((_to)->flags & TCP_OPTS_FLAG_TSTAMP)

#define	tcp_opts_wscale(_to) ((_to)->flags & TCP_OPTS_FLAG_WSCALE)

#define	tcp_opts_sack(_to) ((_to)->flags & TCP_OPTS_FLAG_SACK)

#define	tcp_opts_sack_permitted(_to) ((_to)->flags & TCP_OPTS_FLAG_SACK_PERMITTED)

#define	TCP_OPTION_LEN_EOL 1

#define	TCP_OPTION_LEN_NOOP 1

#define	TCP_OPTION_LEN_MSS 4

#define	TCP_OPTION_LEN_WINDOW_SCALE 3

#define	TCP_OPTION_LEN_SACK_PERMITTED 2

#define	TCP_OPTION_LEN_TIMESTAMP 10

#define	TCP_OPTION_LEN_SACK_BLOCK 8

#define	TCP_HDR_LEN_MAX 60

#define	TCP_WND_MAX 65535U

#define	TCP_MAX_WND_SCALE 14 /* See RFC 1323 */

#define	TCP_OPTS_ALIGN 4

#define	TCP_OPTS_MAX_SACK_BLOCKS 3

#define	TCP_MAX_GSO_SZ 65536

#define	seq_lt(_s1, _s2) ((i32)((_s1)-(_s2)) < 0)

#define	seq_leq(_s1, _s2) ((i32)((_s1)-(_s2)) <= 0)

#define	seq_gt(_s1, _s2) ((i32)((_s1)-(_s2)) > 0)

#define	seq_geq(_s1, _s2) ((i32)((_s1)-(_s2)) >= 0)

#define	seq_max(_s1, _s2) (seq_gt((_s1), (_s2)) ? (_s1) : (_s2))

#define	timestamp_lt(_t1, _t2) ((i32)((_t1)-(_t2)) < 0)

#define	timestamp_leq(_t1, _t2) ((i32)((_t1)-(_t2)) <= 0)

Typedefs
typedef struct _tcp_header	tcp_header_t

typedef enum tcp_option_type	tcp_option_type_t

typedef struct _sack_block	sack_block_t

Enumerations
enum	{ TCP_N_FLAG_BITS }

enum	{ foreach_tcp_flag }

enum	tcp_option_type { TCP_OPTION_EOL = 0, TCP_OPTION_NOOP = 1, TCP_OPTION_MSS = 2, TCP_OPTION_WINDOW_SCALE = 3, TCP_OPTION_SACK_PERMITTED = 4, TCP_OPTION_SACK_BLOCK = 5, TCP_OPTION_TIMESTAMP = 8, TCP_OPTION_UTO = 28, TCP_OPTION_AO = 29 }

enum	{ TCP_OPTIONS_N_FLAG_BITS }

enum	{ foreach_tcp_options_flag }

Functions
static int	tcp_header_bytes (tcp_header_t *t)

static int	tcp_options_parse (tcp_header_t th, tcp_options_t to, u8 is_syn)
	Parse TCP header options. More...

static u32	tcp_options_write (u8 data, tcp_options_t opts)
	Write TCP options to segment. More...

Macro Definition Documentation

◆ foreach_tcp_flag

#define foreach_tcp_flag

Value:

_ (FIN) /**< No more data from sender. */             \
  _ (SYN) /**< Synchronize sequence numbers. */         \
  _ (RST) /**< Reset the connection. */                 \
  _ (PSH) /**< Push function. */                        \
  _ (ACK) /**< Ack field significant. */                \
  _ (URG) /**< Urgent pointer field significant. */     \
  _ (ECE) /**< ECN-echo. Receiver got CE packet */      \
  _ (CWR)

Sender reduced congestion window.

Definition at line 22 of file tcp_packet.h.

◆ foreach_tcp_options_flag

#define foreach_tcp_options_flag

Value:

_ (MSS)               /**< MSS advertised in SYN */                   \
  _ (TSTAMP)            /**< Timestamp capability advertised in SYN */  \
  _ (WSCALE)            /**< Wnd scale capability advertised in SYN */  \
  _ (SACK_PERMITTED)    /**< SACK capability advertised in SYN */       \
  _ (SACK)

SACK present.

Definition at line 115 of file tcp_packet.h.

◆ seq_geq

#define seq_geq	(	_s1,
		_s2
	)	((i32)((_s1)-(_s2)) >= 0)

Definition at line 181 of file tcp_packet.h.

◆ seq_gt

#define seq_gt	(	_s1,
		_s2
	)	((i32)((_s1)-(_s2)) > 0)

Definition at line 180 of file tcp_packet.h.

◆ seq_leq

#define seq_leq	(	_s1,
		_s2
	)	((i32)((_s1)-(_s2)) <= 0)

Definition at line 179 of file tcp_packet.h.

◆ seq_lt

#define seq_lt	(	_s1,
		_s2
	)	((i32)((_s1)-(_s2)) < 0)

Definition at line 178 of file tcp_packet.h.

◆ seq_max

#define seq_max	(	_s1,
		_s2
	)	(seq_gt((_s1), (_s2)) ? (_s1) : (_s2))

Definition at line 182 of file tcp_packet.h.

◆ tcp_ack

#define tcp_ack ( _th ) ((_th)->flags & TCP_FLAG_ACK)

Definition at line 83 of file tcp_packet.h.

◆ tcp_cwr

#define tcp_cwr ( _th ) ((_th)->flags & TCP_FLAG_CWR)

Definition at line 86 of file tcp_packet.h.

◆ tcp_doff

#define tcp_doff ( _th ) ((_th)->data_offset_and_reserved >> 4)

Definition at line 78 of file tcp_packet.h.

◆ tcp_ece

#define tcp_ece ( _th ) ((_th)->flags & TCP_FLAG_ECE)

Definition at line 85 of file tcp_packet.h.

◆ tcp_fin

#define tcp_fin ( _th ) ((_th)->flags & TCP_FLAG_FIN)

Definition at line 79 of file tcp_packet.h.

◆ TCP_HDR_LEN_MAX

#define TCP_HDR_LEN_MAX 60

Definition at line 170 of file tcp_packet.h.

◆ tcp_is_fin

#define tcp_is_fin ( _th ) !!((_th)->flags & TCP_FLAG_FIN)

Definition at line 90 of file tcp_packet.h.

◆ tcp_is_syn

#define tcp_is_syn ( _th ) !!((_th)->flags & TCP_FLAG_SYN)

Definition at line 89 of file tcp_packet.h.

◆ TCP_MAX_GSO_SZ

#define TCP_MAX_GSO_SZ 65536

Definition at line 175 of file tcp_packet.h.

◆ TCP_MAX_WND_SCALE

#define TCP_MAX_WND_SCALE 14 /* See RFC 1323 */

Definition at line 172 of file tcp_packet.h.

◆ TCP_OPTION_LEN_EOL

#define TCP_OPTION_LEN_EOL 1

Definition at line 162 of file tcp_packet.h.

◆ TCP_OPTION_LEN_MSS

#define TCP_OPTION_LEN_MSS 4

Definition at line 164 of file tcp_packet.h.

◆ TCP_OPTION_LEN_NOOP

#define TCP_OPTION_LEN_NOOP 1

Definition at line 163 of file tcp_packet.h.

◆ TCP_OPTION_LEN_SACK_BLOCK

#define TCP_OPTION_LEN_SACK_BLOCK 8

Definition at line 168 of file tcp_packet.h.

◆ TCP_OPTION_LEN_SACK_PERMITTED

#define TCP_OPTION_LEN_SACK_PERMITTED 2

Definition at line 166 of file tcp_packet.h.

◆ TCP_OPTION_LEN_TIMESTAMP

#define TCP_OPTION_LEN_TIMESTAMP 10

Definition at line 167 of file tcp_packet.h.

◆ TCP_OPTION_LEN_WINDOW_SCALE

#define TCP_OPTION_LEN_WINDOW_SCALE 3

Definition at line 165 of file tcp_packet.h.

◆ TCP_OPTS_ALIGN

#define TCP_OPTS_ALIGN 4

Definition at line 173 of file tcp_packet.h.

◆ TCP_OPTS_MAX_SACK_BLOCKS

#define TCP_OPTS_MAX_SACK_BLOCKS 3

Definition at line 174 of file tcp_packet.h.

◆ tcp_opts_mss

#define tcp_opts_mss ( _to ) ((_to)->flags & TCP_OPTS_FLAG_MSS)

Definition at line 155 of file tcp_packet.h.

◆ tcp_opts_sack

#define tcp_opts_sack ( _to ) ((_to)->flags & TCP_OPTS_FLAG_SACK)

Definition at line 158 of file tcp_packet.h.

◆ tcp_opts_sack_permitted

#define tcp_opts_sack_permitted ( _to ) ((_to)->flags & TCP_OPTS_FLAG_SACK_PERMITTED)

Definition at line 159 of file tcp_packet.h.

◆ tcp_opts_tstamp

#define tcp_opts_tstamp ( _to ) ((_to)->flags & TCP_OPTS_FLAG_TSTAMP)

Definition at line 156 of file tcp_packet.h.

◆ tcp_opts_wscale

#define tcp_opts_wscale ( _to ) ((_to)->flags & TCP_OPTS_FLAG_WSCALE)

Definition at line 157 of file tcp_packet.h.

◆ tcp_psh

#define tcp_psh ( _th ) ((_th)->flags & TCP_FLAG_PSH)

Definition at line 82 of file tcp_packet.h.

◆ tcp_rst

#define tcp_rst ( _th ) ((_th)->flags & TCP_FLAG_RST)

Definition at line 81 of file tcp_packet.h.

◆ tcp_syn

#define tcp_syn ( _th ) ((_th)->flags & TCP_FLAG_SYN)

Definition at line 80 of file tcp_packet.h.

◆ tcp_urg

#define tcp_urg ( _th ) ((_th)->flags & TCP_FLAG_URG)

Definition at line 84 of file tcp_packet.h.

◆ TCP_WND_MAX

#define TCP_WND_MAX 65535U

Definition at line 171 of file tcp_packet.h.

◆ timestamp_leq

#define timestamp_leq	(	_t1,
		_t2
	)	((i32)((_t1)-(_t2)) <= 0)

Definition at line 186 of file tcp_packet.h.

◆ timestamp_lt

#define timestamp_lt	(	_t1,
		_t2
	)	((i32)((_t1)-(_t2)) < 0)

Definition at line 185 of file tcp_packet.h.

Typedef Documentation

◆ sack_block_t

typedef struct _sack_block sack_block_t

◆ tcp_header_t

typedef struct _tcp_header tcp_header_t

◆ tcp_option_type_t

typedef enum tcp_option_type tcp_option_type_t

Enumeration Type Documentation

◆ anonymous enum

anonymous enum

Enumerator
TCP_N_FLAG_BITS

Definition at line 32 of file tcp_packet.h.

◆ anonymous enum

anonymous enum

Enumerator
foreach_tcp_flag

Definition at line 40 of file tcp_packet.h.

◆ anonymous enum

anonymous enum

Enumerator
TCP_OPTIONS_N_FLAG_BITS

Definition at line 122 of file tcp_packet.h.

◆ anonymous enum

anonymous enum

Enumerator
foreach_tcp_options_flag

Definition at line 130 of file tcp_packet.h.

◆ tcp_option_type

enum tcp_option_type

Enumerator
TCP_OPTION_EOL	End of options.
TCP_OPTION_NOOP	No operation.
TCP_OPTION_MSS	Limit MSS.
TCP_OPTION_WINDOW_SCALE	Window scale.
TCP_OPTION_SACK_PERMITTED	Selective Ack permitted.
TCP_OPTION_SACK_BLOCK	Selective Ack block.
TCP_OPTION_TIMESTAMP	Timestamps.
TCP_OPTION_UTO	User timeout.
TCP_OPTION_AO	Authentication Option.

Definition at line 102 of file tcp_packet.h.

Function Documentation

◆ tcp_header_bytes()

static int tcp_header_bytes ( tcp_header_t * t )

inlinestatic

Definition at line 93 of file tcp_packet.h.

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◆ tcp_options_parse()

static int tcp_options_parse	(	tcp_header_t *	th,
		tcp_options_t *	to,
		u8	is_syn
	)

inlinestatic

Parse TCP header options.

Parameters

th	TCP header
to	TCP options data structure to be populated
is_syn	set if packet is syn

Returns: -1 if parsing failed

Definition at line 197 of file tcp_packet.h.

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◆ tcp_options_write()

static u32 tcp_options_write	(	u8 *	data,
		tcp_options_t *	opts
	)

inlinestatic

Write TCP options to segment.

Parameters

data	buffer where to write the options
opts	options to write

Returns: length of options written

Definition at line 309 of file tcp_packet.h.

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Data Structures

Macros

Typedefs

Enumerations

Functions

Macro Definition Documentation

◆ foreach_tcp_flag

◆ foreach_tcp_options_flag

◆ seq_geq

◆ seq_gt

◆ seq_leq

◆ seq_lt

◆ seq_max

◆ tcp_ack

◆ tcp_cwr

◆ tcp_doff

◆ tcp_ece

◆ tcp_fin

◆ TCP_HDR_LEN_MAX

◆ tcp_is_fin

◆ tcp_is_syn

◆ TCP_MAX_GSO_SZ

◆ TCP_MAX_WND_SCALE

◆ TCP_OPTION_LEN_EOL

◆ TCP_OPTION_LEN_MSS

◆ TCP_OPTION_LEN_NOOP

◆ TCP_OPTION_LEN_SACK_BLOCK

◆ TCP_OPTION_LEN_SACK_PERMITTED

◆ TCP_OPTION_LEN_TIMESTAMP

◆ TCP_OPTION_LEN_WINDOW_SCALE

◆ TCP_OPTS_ALIGN

◆ TCP_OPTS_MAX_SACK_BLOCKS

◆ tcp_opts_mss

◆ tcp_opts_sack

◆ tcp_opts_sack_permitted

◆ tcp_opts_tstamp

◆ tcp_opts_wscale

◆ tcp_psh

◆ tcp_rst

◆ tcp_syn

◆ tcp_urg

◆ TCP_WND_MAX

◆ timestamp_leq

◆ timestamp_lt

Typedef Documentation

◆ sack_block_t

◆ tcp_header_t

◆ tcp_option_type_t

Enumeration Type Documentation

◆ anonymous enum

◆ anonymous enum

◆ anonymous enum

◆ anonymous enum

◆ tcp_option_type

Function Documentation

◆ tcp_header_bytes()

◆ tcp_options_parse()

◆ tcp_options_write()