tcp_output.c File Reference

Include dependency graph for tcp_output.c:

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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)
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_connection_t *tc, tcp_options_t *opts)
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...
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)
u16	ip6_tcp_compute_checksum_custom (vlib_main_t *vm, vlib_buffer_t *p0, ip46_address_t *src, ip46_address_t *dst)
u16	ip4_tcp_compute_checksum_custom (vlib_main_t *vm, vlib_buffer_t *p0, ip46_address_t *src, ip46_address_t *dst)
static u16	tcp_compute_checksum (tcp_connection_t *tc, 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 (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)
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...
static u32	tcp_buffer_len (vlib_buffer_t *b)
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_retransmit (tcp_connection_t *tc)
void	tcp_timer_delack_handler (u32 index, u32 thread_index)
	Delayed ack timer handler. More...
void	tcp_send_window_update_ack (tcp_connection_t *tc)
	Send window update ack. 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_check_sack_reneging (tcp_connection_t *tc)
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, u32 thread_index)
void	tcp_timer_retransmit_syn_handler (u32 tc_index, u32 thread_index)
	SYN retransmit timer handler. More...
void	tcp_timer_persist_handler (u32 index, u32 thread_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_transmit_unsent (tcp_worker_ctx_t *wrk, tcp_connection_t *tc, u32 burst_size)
int	tcp_fastrecovery_prr_snd_space (tcp_connection_t *tc)
	Estimate send space using proportional rate reduction (RFC6937) More...
static u8	tcp_retransmit_should_retry_head (tcp_connection_t *tc, sack_scoreboard_t *sb)
static u8	tcp_max_tx_deq (tcp_connection_t *tc)
static int	tcp_retransmit_sack (tcp_worker_ctx_t *wrk, tcp_connection_t *tc, u32 burst_size)
	Do retransmit with SACKs. More...
static int	tcp_retransmit_no_sack (tcp_worker_ctx_t *wrk, tcp_connection_t *tc, u32 burst_size)
	Fast retransmit without SACK info. More...
static int	tcp_send_acks (tcp_connection_t *tc, u32 max_burst_size)
static int	tcp_do_retransmit (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_check_if_gso (tcp_connection_t *tc, vlib_buffer_t *b)
static void	tcp_output_handle_packet (tcp_connection_t *tc0, vlib_buffer_t *b0, vlib_node_runtime_t *error_node, 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

foreach_tcp4_output_next

#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.

foreach_tcp4_reset_next

#define foreach_tcp4_reset_next

Value:

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

Definition at line 2525 of file tcp_output.c.

foreach_tcp6_output_next

#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.

foreach_tcp6_reset_next

#define foreach_tcp6_reset_next

Value:

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

Definition at line 2529 of file tcp_output.c.

scoreboard_rescue_rxt_valid

#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 1846 of file tcp_output.c.

tcp_error

#define tcp_error	(		n,
			s
	)		s,

Typedef Documentation

tcp_output_next_t

typedef enum _tcp_output_next tcp_output_next_t

tcp_reset_next_t

typedef enum _tcp_reset_next tcp_reset_next_t

Function Documentation

format_tcp_tx_trace()

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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ip4_tcp_compute_checksum_custom()

u16 ip4_tcp_compute_checksum_custom	(	vlib_main_t *	vm,
		vlib_buffer_t *	p0,
		ip46_address_t *	src,
		ip46_address_t *	dst
	)

Definition at line 476 of file tcp_output.c.

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ip6_tcp_compute_checksum_custom()

u16 ip6_tcp_compute_checksum_custom	(	vlib_main_t *	vm,
		vlib_buffer_t *	p0,
		ip46_address_t *	src,
		ip46_address_t *	dst
	)

Definition at line 450 of file tcp_output.c.

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tcp46_output_inline()

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 2349 of file tcp_output.c.

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tcp46_output_trace_frame()

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 2244 of file tcp_output.c.

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tcp46_send_reset_inline()

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 2534 of file tcp_output.c.

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tcp4_output_node()

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

Definition at line 2466 of file tcp_output.c.

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tcp4_reset_node()

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

Definition at line 2603 of file tcp_output.c.

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tcp6_output_node()

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

Definition at line 2472 of file tcp_output.c.

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tcp6_reset_node()

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

Definition at line 2609 of file tcp_output.c.

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tcp_buffer_len()

static u32 tcp_buffer_len ( vlib_buffer_t *  b )

inlinestatic

Definition at line 1125 of file tcp_output.c.

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tcp_cc_init_rxt_timeout()

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 1430 of file tcp_output.c.

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tcp_check_if_gso()

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

inlinestatic

Definition at line 2286 of file tcp_output.c.

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tcp_check_sack_reneging()

static void tcp_check_sack_reneging ( tcp_connection_t *  tc )

static

Definition at line 1414 of file tcp_output.c.

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tcp_compute_checksum()

static u16 tcp_compute_checksum ( tcp_connection_t *  tc, vlib_buffer_t *  b  )

inlinestatic

Definition at line 496 of file tcp_output.c.

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tcp_do_retransmit()

static int tcp_do_retransmit ( tcp_connection_t *  tc, u32  max_burst_size  )

static

Definition at line 2159 of file tcp_output.c.

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tcp_enqueue_to_ip_lookup()

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 666 of file tcp_output.c.

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tcp_enqueue_to_ip_lookup_i()

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 623 of file tcp_output.c.

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tcp_enqueue_to_ip_lookup_now()

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 659 of file tcp_output.c.

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tcp_enqueue_to_output()

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

static

Definition at line 675 of file tcp_output.c.

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tcp_fastrecovery_prr_snd_space()

int tcp_fastrecovery_prr_snd_space

(

tcp_connection_t *

tc

)

Estimate send space using proportional rate reduction (RFC6937)

Definition at line 1803 of file tcp_output.c.

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tcp_flush_frame_to_ip_lookup()

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 986 of file tcp_output.c.

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tcp_flush_frames_to_output()

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 1002 of file tcp_output.c.

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tcp_init_buffer()

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

static

Definition at line 435 of file tcp_output.c.

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tcp_initial_window_to_advertise()

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 101 of file tcp_output.c.

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tcp_initial_wnd_unscaled()

static u32 tcp_initial_wnd_unscaled ( tcp_connection_t *  tc )

inlinestatic

TCP's initial window.

Definition at line 82 of file tcp_output.c.

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tcp_make_ack()

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

inlinestatic

Convert buffer to ACK.

Definition at line 555 of file tcp_output.c.

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tcp_make_ack_i()

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 522 of file tcp_output.c.

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tcp_make_established_options()

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

static

Definition at line 317 of file tcp_output.c.

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tcp_make_fin()

void tcp_make_fin	(	tcp_connection_t *	tc,
		vlib_buffer_t *	b
	)

Convert buffer to FIN-ACK.

Definition at line 566 of file tcp_output.c.

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tcp_make_options()

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

inlinestatic

Definition at line 352 of file tcp_output.c.

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tcp_make_reset_in_place()

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 690 of file tcp_output.c.

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tcp_make_syn()

void tcp_make_syn	(	tcp_connection_t *	tc,
		vlib_buffer_t *	b
	)

Convert buffer to SYN.

Definition at line 575 of file tcp_output.c.

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tcp_make_syn_options()

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

static

Definition at line 253 of file tcp_output.c.

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tcp_make_synack()

void tcp_make_synack	(	tcp_connection_t *	tc,
		vlib_buffer_t *	b
	)

Convert buffer to SYN-ACK.

Definition at line 601 of file tcp_output.c.

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tcp_make_synack_options()

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

static

Definition at line 282 of file tcp_output.c.

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tcp_max_tx_deq()

static u8 tcp_max_tx_deq ( tcp_connection_t *  tc )

inlinestatic

Definition at line 1840 of file tcp_output.c.

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tcp_options_write()

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

static

Write TCP options to segment.

Definition at line 172 of file tcp_output.c.

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tcp_output_handle_link_local()

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

static

Definition at line 2212 of file tcp_output.c.

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tcp_output_handle_packet()

static void tcp_output_handle_packet ( tcp_connection_t *  tc0, vlib_buffer_t *  b0, vlib_node_runtime_t *  error_node, u16 *  next0, u8  is_ip4  )

inlinestatic

Definition at line 2310 of file tcp_output.c.

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tcp_output_push_ip()

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 2268 of file tcp_output.c.

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tcp_prepare_retransmit_segment()

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 1372 of file tcp_output.c.

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tcp_prepare_segment()

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 1260 of file tcp_output.c.

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tcp_program_ack()

void tcp_program_ack

(

tcp_connection_t *

tc

)

Definition at line 1181 of file tcp_output.c.

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tcp_program_dupack()

void tcp_program_dupack

(

tcp_connection_t *

tc

)

Definition at line 1191 of file tcp_output.c.

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tcp_program_retransmit()

void tcp_program_retransmit

(

tcp_connection_t *

tc

)

Definition at line 1203 of file tcp_output.c.

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tcp_push_hdr_i()

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 1061 of file tcp_output.c.

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tcp_push_ip_hdr()

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

static

Definition at line 891 of file tcp_output.c.

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tcp_retransmit_first_unacked()

int tcp_retransmit_first_unacked	(	tcp_worker_ctx_t *	wrk,
		tcp_connection_t *	tc
	)

Retransmit first unacked segment.

Definition at line 1744 of file tcp_output.c.

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tcp_retransmit_no_sack()

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

static

Fast retransmit without SACK info.

Definition at line 2023 of file tcp_output.c.

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tcp_retransmit_sack()

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

static

Do retransmit with SACKs.

Definition at line 1854 of file tcp_output.c.

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tcp_retransmit_should_retry_head()

static u8 tcp_retransmit_should_retry_head ( tcp_connection_t *  tc, sack_scoreboard_t *  sb  )

inlinestatic

Definition at line 1827 of file tcp_output.c.

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tcp_reuse_buffer()

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

static

Definition at line 418 of file tcp_output.c.

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tcp_send_ack()

void tcp_send_ack

(

tcp_connection_t *

tc

)

Definition at line 1162 of file tcp_output.c.

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tcp_send_acks()

static int tcp_send_acks ( tcp_connection_t *  tc, u32  max_burst_size  )

static

Definition at line 2104 of file tcp_output.c.

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tcp_send_fin()

void tcp_send_fin

(

tcp_connection_t *

tc

)

Send FIN.

Definition at line 1012 of file tcp_output.c.

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tcp_send_reset()

void tcp_send_reset

(

tcp_connection_t *

tc

)

Build and set reset packet for connection.

Definition at line 858 of file tcp_output.c.

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tcp_send_reset_w_pkt()

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 775 of file tcp_output.c.

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tcp_send_syn()

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 924 of file tcp_output.c.

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tcp_send_synack()

void tcp_send_synack

(

tcp_connection_t *

tc

)

Definition at line 959 of file tcp_output.c.

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tcp_send_window_update_ack()

void tcp_send_window_update_ack

(

tcp_connection_t *

tc

)

Send window update ack.

Ensures that it will be sent only once, after a zero rwnd has been advertised in a previous ack, and only if rwnd has grown beyond a configurable value.

Definition at line 1234 of file tcp_output.c.

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tcp_session_custom_tx()

int tcp_session_custom_tx	(	void *	conn,
		u32	max_burst_size
	)

Definition at line 2178 of file tcp_output.c.

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tcp_session_push_header()

u32 tcp_session_push_header	(	transport_connection_t *	tconn,
		vlib_buffer_t *	b
	)

Definition at line 1134 of file tcp_output.c.

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tcp_timer_delack_handler()

void tcp_timer_delack_handler	(	u32	index,
		u32	thread_index
	)

Delayed ack timer handler.

Sends delayed ACK when timer expires

Definition at line 1218 of file tcp_output.c.

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tcp_timer_persist_handler()

void tcp_timer_persist_handler	(	u32	index,
		u32	thread_index
	)

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

Definition at line 1664 of file tcp_output.c.

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tcp_timer_retransmit_handler()

void tcp_timer_retransmit_handler	(	u32	tc_index,
		u32	thread_index
	)

Definition at line 1452 of file tcp_output.c.

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tcp_timer_retransmit_syn_handler()

void tcp_timer_retransmit_syn_handler	(	u32	tc_index,
		u32	thread_index
	)

SYN retransmit timer handler.

Active open only.

Definition at line 1598 of file tcp_output.c.

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tcp_transmit_unsent()

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

static

Definition at line 1763 of file tcp_output.c.

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tcp_update_burst_snd_vars()

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 387 of file tcp_output.c.

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tcp_update_rcv_wnd()

static void tcp_update_rcv_wnd ( tcp_connection_t *  tc )

inlinestatic

Definition at line 113 of file tcp_output.c.

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tcp_window_compute_scale()

static u8 tcp_window_compute_scale ( u32  window )

static

Definition at line 70 of file tcp_output.c.

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tcp_window_to_advertise()

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 159 of file tcp_output.c.

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Variable Documentation

tcp4_output_node

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 2479 of file tcp_output.c.

tcp4_reset_node

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 2616 of file tcp_output.c.

tcp6_output_node

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 2499 of file tcp_output.c.

tcp6_reset_node

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 2632 of file tcp_output.c.

tcp_error_strings

char* tcp_error_strings[]

static

Initial value:

= {
#define tcp_error(n,s) 


}

Definition at line 40 of file tcp_output.c.