tcp_output.c File Reference

Include dependency graph for tcp_output.c:

Go to the source code of this file.

Data Structures
struct	tcp_tx_trace_t

Macros
#define	foreach_tcp4_output_next
#define	foreach_tcp6_output_next
#define	tcp_error(n, s)   s,
#define	scoreboard_rescue_rxt_valid(_sb, _tc)
#define	foreach_tcp4_reset_next
#define	foreach_tcp6_reset_next

Typedefs
typedef enum _tcp_output_next	tcp_output_next_t
typedef enum _tcp_reset_next	tcp_reset_next_t

Functions
static u8 *	format_tcp_tx_trace (u8 *s, va_list *args)
static u8	tcp_window_compute_scale (u32 window)
void	tcp_update_rcv_mss (tcp_connection_t *tc)
	Update max segment size we're able to process. More...
static u32	tcp_initial_wnd_unscaled (tcp_connection_t *tc)
	TCP's initial window. More...
u32	tcp_initial_window_to_advertise (tcp_connection_t *tc)
	Compute initial window and scale factor. More...
static void	tcp_update_rcv_wnd (tcp_connection_t *tc)
static u32	tcp_window_to_advertise (tcp_connection_t *tc, tcp_state_t state)
	Compute and return window to advertise, scaled as per RFC1323. More...
static u32	tcp_options_write (u8 *data, tcp_options_t *opts)
	Write TCP options to segment. More...
static int	tcp_make_syn_options (tcp_options_t *opts, u8 wnd_scale)
static int	tcp_make_synack_options (tcp_connection_t *tc, tcp_options_t *opts)
static int	tcp_make_established_options (tcp_connection_t *tc, tcp_options_t *opts)
static int	tcp_make_options (tcp_connection_t *tc, tcp_options_t *opts, tcp_state_t state)
void	tcp_update_burst_snd_vars (tcp_connection_t *tc)
	Update burst send vars. More...
void	tcp_init_mss (tcp_connection_t *tc)
static void *	tcp_reuse_buffer (vlib_main_t *vm, vlib_buffer_t *b)
static void *	tcp_init_buffer (vlib_main_t *vm, vlib_buffer_t *b)
static void	tcp_make_ack_i (tcp_connection_t *tc, vlib_buffer_t *b, tcp_state_t state, u8 flags)
	Prepare ACK. More...
static void	tcp_make_ack (tcp_connection_t *tc, vlib_buffer_t *b)
	Convert buffer to ACK. More...
void	tcp_make_fin (tcp_connection_t *tc, vlib_buffer_t *b)
	Convert buffer to FIN-ACK. More...
void	tcp_make_syn (tcp_connection_t *tc, vlib_buffer_t *b)
	Convert buffer to SYN. More...
void	tcp_make_synack (tcp_connection_t *tc, vlib_buffer_t *b)
	Convert buffer to SYN-ACK. More...
static void	tcp_enqueue_to_ip_lookup_i (tcp_worker_ctx_t *wrk, vlib_buffer_t *b, u32 bi, u8 is_ip4, u32 fib_index, u8 flush)
static void	tcp_enqueue_to_ip_lookup_now (tcp_worker_ctx_t *wrk, vlib_buffer_t *b, u32 bi, u8 is_ip4, u32 fib_index)
static void	tcp_enqueue_to_ip_lookup (tcp_worker_ctx_t *wrk, vlib_buffer_t *b, u32 bi, u8 is_ip4, u32 fib_index)
static void	tcp_enqueue_to_output_i (tcp_worker_ctx_t *wrk, vlib_buffer_t *b, u32 bi, u8 is_ip4, u8 flush)
static void	tcp_enqueue_to_output (tcp_worker_ctx_t *wrk, vlib_buffer_t *b, u32 bi, u8 is_ip4)
static void	tcp_enqueue_to_output_now (tcp_worker_ctx_t *wrk, vlib_buffer_t *b, u32 bi, u8 is_ip4)
static int	tcp_make_reset_in_place (vlib_main_t *vm, vlib_buffer_t *b0, tcp_state_t state, u8 thread_index, u8 is_ip4)
void	tcp_send_reset_w_pkt (tcp_connection_t *tc, vlib_buffer_t *pkt, u32 thread_index, u8 is_ip4)
	Send reset without reusing existing buffer. More...
void	tcp_send_reset (tcp_connection_t *tc)
	Build and set reset packet for connection. More...
static void	tcp_push_ip_hdr (tcp_worker_ctx_t *wrk, tcp_connection_t *tc, vlib_buffer_t *b)
void	tcp_send_syn (tcp_connection_t *tc)
	Send SYN. More...
void	tcp_send_synack (tcp_connection_t *tc)
void	tcp_flush_frame_to_output (tcp_worker_ctx_t *wrk, u8 is_ip4)
	Flush tx frame populated by retransmits and timer pops. More...
static void	tcp_flush_frame_to_ip_lookup (tcp_worker_ctx_t *wrk, u8 is_ip4)
	Flush ip lookup tx frames populated by timer pops. More...
void	tcp_flush_frames_to_output (tcp_worker_ctx_t *wrk)
	Flush v4 and v6 tcp and ip-lookup tx frames for thread index. More...
void	tcp_send_fin (tcp_connection_t *tc)
	Send FIN. More...
static void	tcp_push_hdr_i (tcp_connection_t *tc, vlib_buffer_t *b, u32 snd_nxt, u8 compute_opts, u8 maybe_burst, u8 update_snd_nxt)
	Push TCP header and update connection variables. More...
u32	tcp_session_push_header (transport_connection_t *tconn, vlib_buffer_t *b)
void	tcp_send_ack (tcp_connection_t *tc)
void	tcp_program_ack (tcp_connection_t *tc)
void	tcp_program_dupack (tcp_connection_t *tc)
void	tcp_program_fastretransmit (tcp_connection_t *tc)
void	tcp_timer_delack_handler (u32 index)
	Delayed ack timer handler. More...
void	tcp_send_window_update_ack (tcp_connection_t *tc)
	Send Window Update ACK, ensuring that it will be sent once, if RWND became non-zero, after zero RWND has been advertised in ACK before. More...
static int	tcp_prepare_segment (tcp_worker_ctx_t *wrk, tcp_connection_t *tc, u32 offset, u32 max_deq_bytes, vlib_buffer_t **b)
	Allocate a new buffer and build a new tcp segment. More...
static u32	tcp_prepare_retransmit_segment (tcp_worker_ctx_t *wrk, tcp_connection_t *tc, u32 offset, u32 max_deq_bytes, vlib_buffer_t **b)
	Build a retransmit segment. More...
static void	tcp_cc_init_rxt_timeout (tcp_connection_t *tc)
	Reset congestion control, switch cwnd to loss window and try again. More...
void	tcp_timer_retransmit_handler (u32 tc_index)
void	tcp_timer_retransmit_syn_handler (u32 tc_index)
	SYN retransmit timer handler. More...
void	tcp_timer_persist_handler (u32 index)
	Got 0 snd_wnd from peer, try to do something about it. More...
int	tcp_retransmit_first_unacked (tcp_worker_ctx_t *wrk, tcp_connection_t *tc)
	Retransmit first unacked segment. More...
static int	tcp_fast_retransmit_unsent (tcp_worker_ctx_t *wrk, tcp_connection_t *tc, u32 burst_size)
int	tcp_fast_retransmit_sack (tcp_worker_ctx_t *wrk, tcp_connection_t *tc, u32 burst_size)
	Do fast retransmit with SACKs. More...
int	tcp_fast_retransmit_no_sack (tcp_worker_ctx_t *wrk, tcp_connection_t *tc, u32 burst_size)
	Fast retransmit without SACK info. More...
int	tcp_fast_retransmit (tcp_worker_ctx_t *wrk, tcp_connection_t *tc, u32 burst_size)
	Do fast retransmit. More...
static int	tcp_send_acks (tcp_connection_t *tc, u32 max_burst_size)
static int	tcp_do_fastretransmit (tcp_connection_t *tc, u32 max_burst_size)
int	tcp_session_custom_tx (void *conn, u32 max_burst_size)
static void	tcp_output_handle_link_local (tcp_connection_t *tc0, vlib_buffer_t *b0, u16 *next0, u32 *error0)
static void	tcp46_output_trace_frame (vlib_main_t *vm, vlib_node_runtime_t *node, u32 *to_next, u32 n_bufs)
static void	tcp_output_push_ip (vlib_main_t *vm, vlib_buffer_t *b0, tcp_connection_t *tc0, u8 is_ip4)
static void	tcp_output_handle_packet (tcp_connection_t *tc0, vlib_buffer_t *b0, u32 *error0, u16 *next0, u8 is_ip4)
static uword	tcp46_output_inline (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame, int is_ip4)
VLIB_NODE_FN()	tcp4_output_node (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame)
VLIB_NODE_FN()	tcp6_output_node (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame)
static uword	tcp46_send_reset_inline (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame, u8 is_ip4)
VLIB_NODE_FN()	tcp4_reset_node (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame)
VLIB_NODE_FN()	tcp6_reset_node (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame)

Variables
static char *	tcp_error_strings []
vlib_node_registration_t	tcp4_output_node
	(constructor) VLIB_REGISTER_NODE (tcp4_output_node) More...
vlib_node_registration_t	tcp6_output_node
	(constructor) VLIB_REGISTER_NODE (tcp6_output_node) More...
vlib_node_registration_t	tcp4_reset_node
	(constructor) VLIB_REGISTER_NODE (tcp4_reset_node) More...
vlib_node_registration_t	tcp6_reset_node
	(constructor) VLIB_REGISTER_NODE (tcp6_reset_node) More...

Macro Definition Documentation

#define foreach_tcp4_output_next

Value:

_ (DROP, "error-drop")                        \
  _ (IP_LOOKUP, "ip4-lookup")                   \
  _ (IP_REWRITE, "ip4-rewrite")                 \
  _ (IP_ARP, "ip4-arp")

Definition at line 28 of file tcp_output.c.

#define foreach_tcp4_reset_next

Value:

_(DROP, "error-drop")                 \
  _(IP_LOOKUP, "ip4-lookup")

Definition at line 2351 of file tcp_output.c.

#define foreach_tcp6_output_next

Value:

_ (DROP, "error-drop")                        \
  _ (IP_LOOKUP, "ip6-lookup")                   \
  _ (IP_REWRITE, "ip6-rewrite")                 \
  _ (IP_ARP, "ip6-discover-neighbor")

Definition at line 34 of file tcp_output.c.

#define foreach_tcp6_reset_next

Value:

_(DROP, "error-drop")                 \
  _(IP_LOOKUP, "ip6-lookup")

Definition at line 2355 of file tcp_output.c.

#define scoreboard_rescue_rxt_valid	(		_sb,
			_tc
	)

Value:

(seq_geq (_sb->rescue_rxt, _tc->snd_una)                        \
        && seq_leq (_sb->rescue_rxt, _tc->snd_congestion))

Definition at line 1810 of file tcp_output.c.

#define tcp_error	(		n,
			s
	)		s,

Typedef Documentation

typedef enum _tcp_output_next tcp_output_next_t

typedef enum _tcp_reset_next tcp_reset_next_t

Function Documentation

static u8* format_tcp_tx_trace ( u8 *  s, va_list *  args  )

static

Definition at line 53 of file tcp_output.c.

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static uword tcp46_output_inline ( vlib_main_t *  vm, vlib_node_runtime_t *  node, vlib_frame_t *  frame, int  is_ip4  )

inlinestatic

Definition at line 2217 of file tcp_output.c.

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static void tcp46_output_trace_frame ( vlib_main_t *  vm, vlib_node_runtime_t *  node, u32 *  to_next, u32  n_bufs  )

static

Definition at line 2132 of file tcp_output.c.

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static uword tcp46_send_reset_inline ( vlib_main_t *  vm, vlib_node_runtime_t *  node, vlib_frame_t *  from_frame, u8  is_ip4  )

static

Definition at line 2360 of file tcp_output.c.

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VLIB_NODE_FN() tcp4_output_node	(	vlib_main_t *	vm,
		vlib_node_runtime_t *	node,
		vlib_frame_t *	from_frame
	)

Definition at line 2292 of file tcp_output.c.

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VLIB_NODE_FN() tcp4_reset_node	(	vlib_main_t *	vm,
		vlib_node_runtime_t *	node,
		vlib_frame_t *	from_frame
	)

Definition at line 2429 of file tcp_output.c.

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VLIB_NODE_FN() tcp6_output_node	(	vlib_main_t *	vm,
		vlib_node_runtime_t *	node,
		vlib_frame_t *	from_frame
	)

Definition at line 2298 of file tcp_output.c.

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VLIB_NODE_FN() tcp6_reset_node	(	vlib_main_t *	vm,
		vlib_node_runtime_t *	node,
		vlib_frame_t *	from_frame
	)

Definition at line 2435 of file tcp_output.c.

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static void tcp_cc_init_rxt_timeout ( tcp_connection_t *  tc )

static

Reset congestion control, switch cwnd to loss window and try again.

Definition at line 1438 of file tcp_output.c.

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static int tcp_do_fastretransmit ( tcp_connection_t *  tc, u32  max_burst_size  )

static

Definition at line 2043 of file tcp_output.c.

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static void tcp_enqueue_to_ip_lookup ( tcp_worker_ctx_t *  wrk, vlib_buffer_t *  b, u32  bi, u8  is_ip4, u32  fib_index  )

static

Definition at line 623 of file tcp_output.c.

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static void tcp_enqueue_to_ip_lookup_i ( tcp_worker_ctx_t *  wrk, vlib_buffer_t *  b, u32  bi, u8  is_ip4, u32  fib_index, u8  flush  )

inlinestatic

Definition at line 580 of file tcp_output.c.

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static void tcp_enqueue_to_ip_lookup_now ( tcp_worker_ctx_t *  wrk, vlib_buffer_t *  b, u32  bi, u8  is_ip4, u32  fib_index  )

static

Definition at line 616 of file tcp_output.c.

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static void tcp_enqueue_to_output ( tcp_worker_ctx_t *  wrk, vlib_buffer_t *  b, u32  bi, u8  is_ip4  )

static

Definition at line 664 of file tcp_output.c.

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static void tcp_enqueue_to_output_i ( tcp_worker_ctx_t *  wrk, vlib_buffer_t *  b, u32  bi, u8  is_ip4, u8  flush  )

inlinestatic

Definition at line 632 of file tcp_output.c.

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static void tcp_enqueue_to_output_now ( tcp_worker_ctx_t *  wrk, vlib_buffer_t *  b, u32  bi, u8  is_ip4  )

static

Definition at line 671 of file tcp_output.c.

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int tcp_fast_retransmit	(	tcp_worker_ctx_t *	wrk,
		tcp_connection_t *	tc,
		u32	burst_size
	)

Do fast retransmit.

Definition at line 1985 of file tcp_output.c.

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int tcp_fast_retransmit_no_sack	(	tcp_worker_ctx_t *	wrk,
		tcp_connection_t *	tc,
		u32	burst_size
	)

Fast retransmit without SACK info.

Definition at line 1921 of file tcp_output.c.

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int tcp_fast_retransmit_sack	(	tcp_worker_ctx_t *	wrk,
		tcp_connection_t *	tc,
		u32	burst_size
	)

Do fast retransmit with SACKs.

Definition at line 1818 of file tcp_output.c.

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static int tcp_fast_retransmit_unsent ( tcp_worker_ctx_t *  wrk, tcp_connection_t *  tc, u32  burst_size  )

static

Definition at line 1780 of file tcp_output.c.

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static void tcp_flush_frame_to_ip_lookup ( tcp_worker_ctx_t *  wrk, u8  is_ip4  )

static

Flush ip lookup tx frames populated by timer pops.

Definition at line 1003 of file tcp_output.c.

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void tcp_flush_frame_to_output	(	tcp_worker_ctx_t *	wrk,
		u8	is_ip4
	)

Flush tx frame populated by retransmits and timer pops.

Definition at line 988 of file tcp_output.c.

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void tcp_flush_frames_to_output

(

tcp_worker_ctx_t *

wrk

)

Flush v4 and v6 tcp and ip-lookup tx frames for thread index.

Definition at line 1019 of file tcp_output.c.

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static void* tcp_init_buffer ( vlib_main_t *  vm, vlib_buffer_t *  b  )

static

Definition at line 468 of file tcp_output.c.

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void tcp_init_mss

(

tcp_connection_t *

tc

)

Definition at line 426 of file tcp_output.c.

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u32 tcp_initial_window_to_advertise

(

tcp_connection_t *

tc

)

Compute initial window and scale factor.

As per RFC1323, window field in SYN and SYN-ACK segments is never scaled.

Definition at line 114 of file tcp_output.c.

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static u32 tcp_initial_wnd_unscaled ( tcp_connection_t *  tc )

inlinestatic

TCP's initial window.

Definition at line 95 of file tcp_output.c.

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static void tcp_make_ack ( tcp_connection_t *  tc, vlib_buffer_t *  b  )

inlinestatic

Convert buffer to ACK.

Definition at line 514 of file tcp_output.c.

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static void tcp_make_ack_i ( tcp_connection_t *  tc, vlib_buffer_t *  b, tcp_state_t  state, u8  flags  )

inlinestatic

Prepare ACK.

Definition at line 484 of file tcp_output.c.

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static int tcp_make_established_options ( tcp_connection_t *  tc, tcp_options_t *  opts  )

static

Definition at line 330 of file tcp_output.c.

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void tcp_make_fin	(	tcp_connection_t *	tc,
		vlib_buffer_t *	b
	)

Convert buffer to FIN-ACK.

Definition at line 525 of file tcp_output.c.

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static int tcp_make_options ( tcp_connection_t *  tc, tcp_options_t *  opts, tcp_state_t  state  )

inlinestatic

Definition at line 365 of file tcp_output.c.

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static int tcp_make_reset_in_place ( vlib_main_t *  vm, vlib_buffer_t *  b0, tcp_state_t  state, u8  thread_index, u8  is_ip4  )

static

Definition at line 679 of file tcp_output.c.

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void tcp_make_syn	(	tcp_connection_t *	tc,
		vlib_buffer_t *	b
	)

Convert buffer to SYN.

Definition at line 534 of file tcp_output.c.

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static int tcp_make_syn_options ( tcp_options_t *  opts, u8  wnd_scale  )

static

Definition at line 266 of file tcp_output.c.

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void tcp_make_synack	(	tcp_connection_t *	tc,
		vlib_buffer_t *	b
	)

Convert buffer to SYN-ACK.

Definition at line 559 of file tcp_output.c.

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static int tcp_make_synack_options ( tcp_connection_t *  tc, tcp_options_t *  opts  )

static

Definition at line 295 of file tcp_output.c.

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

static

Write TCP options to segment.

Definition at line 185 of file tcp_output.c.

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static void tcp_output_handle_link_local ( tcp_connection_t *  tc0, vlib_buffer_t *  b0, u16 *  next0, u32 *  error0  )

static

Definition at line 2100 of file tcp_output.c.

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static void tcp_output_handle_packet ( tcp_connection_t *  tc0, vlib_buffer_t *  b0, u32 *  error0, u16 *  next0, u8  is_ip4  )

inlinestatic

Definition at line 2183 of file tcp_output.c.

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static void tcp_output_push_ip ( vlib_main_t *  vm, vlib_buffer_t *  b0, tcp_connection_t *  tc0, u8  is_ip4  )

inlinestatic

Definition at line 2155 of file tcp_output.c.

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static u32 tcp_prepare_retransmit_segment ( tcp_worker_ctx_t *  wrk, tcp_connection_t *  tc, u32  offset, u32  max_deq_bytes, vlib_buffer_t **  b  )

static

Build a retransmit segment.

Returns

the number of bytes in the segment or 0 if there's nothing to retransmit

Definition at line 1382 of file tcp_output.c.

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static int tcp_prepare_segment ( tcp_worker_ctx_t *  wrk, tcp_connection_t *  tc, u32  offset, u32  max_deq_bytes, vlib_buffer_t **  b  )

static

Allocate a new buffer and build a new tcp segment.

Parameters

	wrk	tcp worker
	tc	connection for which the segment will be allocated
	offset	offset of the first byte in the tx fifo
	max_deq_byte	segment size
[out]	b	pointer to buffer allocated

Returns

the number of bytes in the segment or 0 if buffer cannot be allocated or no data available

Definition at line 1270 of file tcp_output.c.

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void tcp_program_ack

(

tcp_connection_t *

tc

)

Definition at line 1189 of file tcp_output.c.

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void tcp_program_dupack

(

tcp_connection_t *

tc

)

Definition at line 1199 of file tcp_output.c.

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void tcp_program_fastretransmit

(

tcp_connection_t *

tc

)

Definition at line 1211 of file tcp_output.c.

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static void tcp_push_hdr_i ( tcp_connection_t *  tc, vlib_buffer_t *  b, u32  snd_nxt, u8  compute_opts, u8  maybe_burst, u8  update_snd_nxt  )

inlinestatic

Push TCP header and update connection variables.

Should only be called for segments with data, not for 'control' packets.

Definition at line 1076 of file tcp_output.c.

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static void tcp_push_ip_hdr ( tcp_worker_ctx_t *  wrk, tcp_connection_t *  tc, vlib_buffer_t *  b  )

static

Definition at line 894 of file tcp_output.c.

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int tcp_retransmit_first_unacked	(	tcp_worker_ctx_t *	wrk,
		tcp_connection_t *	tc
	)

Retransmit first unacked segment.

Definition at line 1761 of file tcp_output.c.

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static void* tcp_reuse_buffer ( vlib_main_t *  vm, vlib_buffer_t *  b  )

static

Definition at line 451 of file tcp_output.c.

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void tcp_send_ack

(

tcp_connection_t *

tc

)

Definition at line 1170 of file tcp_output.c.

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static int tcp_send_acks ( tcp_connection_t *  tc, u32  max_burst_size  )

static

Definition at line 1995 of file tcp_output.c.

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void tcp_send_fin

(

tcp_connection_t *

tc

)

Send FIN.

Definition at line 1031 of file tcp_output.c.

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void tcp_send_reset

(

tcp_connection_t *

tc

)

Build and set reset packet for connection.

Definition at line 846 of file tcp_output.c.

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void tcp_send_reset_w_pkt	(	tcp_connection_t *	tc,
		vlib_buffer_t *	pkt,
		u32	thread_index,
		u8	is_ip4
	)

Send reset without reusing existing buffer.

It extracts connection info out of original packet

Definition at line 764 of file tcp_output.c.

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void tcp_send_syn

(

tcp_connection_t *

tc

)

Send SYN.

Builds a SYN packet for a half-open connection and sends it to ipx_lookup. The packet is not forwarded through tcpx_output to avoid doing lookups in the half_open pool.

Definition at line 926 of file tcp_output.c.

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void tcp_send_synack

(

tcp_connection_t *

tc

)

Definition at line 961 of file tcp_output.c.

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void tcp_send_window_update_ack

(

tcp_connection_t *

tc

)

Send Window Update ACK, ensuring that it will be sent once, if RWND became non-zero, after zero RWND has been advertised in ACK before.

Definition at line 1242 of file tcp_output.c.

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int tcp_session_custom_tx	(	void *	conn,
		u32	max_burst_size
	)

Definition at line 2066 of file tcp_output.c.

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u32 tcp_session_push_header	(	transport_connection_t *	tconn,
		vlib_buffer_t *	b
	)

Definition at line 1138 of file tcp_output.c.

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void tcp_timer_delack_handler

(

u32

index

)

Delayed ack timer handler.

Sends delayed ACK when timer expires

Definition at line 1226 of file tcp_output.c.

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void tcp_timer_persist_handler

(

u32

index

)

Got 0 snd_wnd from peer, try to do something about it.

Definition at line 1680 of file tcp_output.c.

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void tcp_timer_retransmit_handler

(

u32

tc_index

)

Definition at line 1462 of file tcp_output.c.

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void tcp_timer_retransmit_syn_handler

(

u32

tc_index

)

SYN retransmit timer handler.

Active open only.

Definition at line 1611 of file tcp_output.c.

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void tcp_update_burst_snd_vars

(

tcp_connection_t *

tc

)

Update burst send vars.

• Updates snd_mss to reflect the effective segment size that we can send by taking into account all TCP options, including SACKs.
• Cache 'on the wire' options for reuse
• Updates receive window which can be reused for a burst.

This should only be called when doing bursts

Definition at line 400 of file tcp_output.c.

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void tcp_update_rcv_mss

(

tcp_connection_t *

tc

)

Update max segment size we're able to process.

The value is constrained by our interface's MTU and IP options. It is also what we advertise to our peer.

Definition at line 85 of file tcp_output.c.

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static void tcp_update_rcv_wnd ( tcp_connection_t *  tc )

inlinestatic

Definition at line 126 of file tcp_output.c.

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static u8 tcp_window_compute_scale ( u32  window )

static

Definition at line 70 of file tcp_output.c.

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static u32 tcp_window_to_advertise ( tcp_connection_t *  tc, tcp_state_t  state  )

inlinestatic

Compute and return window to advertise, scaled as per RFC1323.

Definition at line 172 of file tcp_output.c.

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Variable Documentation

vlib_node_registration_t tcp4_output_node

Initial value:

=
{
  .name = "tcp4-output",
  
  .vector_size = sizeof (u32),
  .n_errors = TCP_N_ERROR,
  .protocol_hint = VLIB_NODE_PROTO_HINT_TCP,
  .error_strings = tcp_error_strings,
  .n_next_nodes = TCP_OUTPUT_N_NEXT,
  .next_nodes = {
#define _(s,n) 
    foreach_tcp4_output_next

  },
  .format_buffer = format_tcp_header,
  .format_trace = format_tcp_tx_trace,
}

(constructor) VLIB_REGISTER_NODE (tcp4_output_node)

Definition at line 2305 of file tcp_output.c.

vlib_node_registration_t tcp4_reset_node

Initial value:

= {
  .name = "tcp4-reset",
  .vector_size = sizeof (u32),
  .n_errors = TCP_N_ERROR,
  .error_strings = tcp_error_strings,
  .n_next_nodes = TCP_RESET_N_NEXT,
  .next_nodes = {
#define _(s,n) 
    foreach_tcp4_reset_next

  },
  .format_trace = format_tcp_tx_trace,
}

(constructor) VLIB_REGISTER_NODE (tcp4_reset_node)

Definition at line 2442 of file tcp_output.c.

vlib_node_registration_t tcp6_output_node

Initial value:

=
{
  .name = "tcp6-output",
    
  .vector_size = sizeof (u32),
  .n_errors = TCP_N_ERROR,
  .protocol_hint = VLIB_NODE_PROTO_HINT_TCP,
  .error_strings = tcp_error_strings,
  .n_next_nodes = TCP_OUTPUT_N_NEXT,
  .next_nodes = {
#define _(s,n) 
    foreach_tcp6_output_next

  },
  .format_buffer = format_tcp_header,
  .format_trace = format_tcp_tx_trace,
}

(constructor) VLIB_REGISTER_NODE (tcp6_output_node)

Definition at line 2325 of file tcp_output.c.

vlib_node_registration_t tcp6_reset_node

Initial value:

= {
  .name = "tcp6-reset",
  .vector_size = sizeof (u32),
  .n_errors = TCP_N_ERROR,
  .error_strings = tcp_error_strings,
  .n_next_nodes = TCP_RESET_N_NEXT,
  .next_nodes = {
#define _(s,n) 
    foreach_tcp6_reset_next

  },
  .format_trace = format_tcp_tx_trace,
}

(constructor) VLIB_REGISTER_NODE (tcp6_reset_node)

Definition at line 2458 of file tcp_output.c.

char* tcp_error_strings[]

static

Initial value:

= {
#define tcp_error(n,s) 


}

Definition at line 40 of file tcp_output.c.