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Vector Packet Processing
node.c File Reference
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Data Structures

struct  flowperpkt_trace_t
 

Macros

#define foreach_flowperpkt_error   _(SWAPPED, "Mac swap packets processed")
 

Enumerations

enum  flowperpkt_error_t { FLOWPERPKT_N_ERROR }
 
enum  flowperpkt_next_t { FLOWPERPKT_NEXT_DROP, FLOWPERPKT_N_NEXT }
 

Functions

static u8format_flowperpkt_trace (u8 *s, va_list *args)
 
static void add_to_flow_record (vlib_main_t *vm, flowperpkt_main_t *fm, u32 rx_sw_if_index, u32 tx_sw_if_index, u32 src_address, u32 dst_address, u8 tos, u64 timestamp, u16 length, int do_flush)
 add an entry to the flow record under construction More...
 
void flowperpkt_flush_callback (void)
 
static uword flowperpkt_node_fn (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
 

Variables

vlib_node_registration_t flowperpkt_node
 IPFIX flow-per-packet graph node. More...
 
static char * flowperpkt_error_strings []
 

Macro Definition Documentation

#define foreach_flowperpkt_error   _(SWAPPED, "Mac swap packets processed")

Definition at line 61 of file node.c.

Enumeration Type Documentation

Enumerator
FLOWPERPKT_N_ERROR 

Definition at line 64 of file node.c.

Enumerator
FLOWPERPKT_NEXT_DROP 
FLOWPERPKT_N_NEXT 

Definition at line 78 of file node.c.

Function Documentation

static void add_to_flow_record ( vlib_main_t vm,
flowperpkt_main_t fm,
u32  rx_sw_if_index,
u32  tx_sw_if_index,
u32  src_address,
u32  dst_address,
u8  tos,
u64  timestamp,
u16  length,
int  do_flush 
)
inlinestatic

add an entry to the flow record under construction

Parameters
vmvlib_main_t * current worker thread main structure pointer
fmflowperpkt_main_t * flow-per-packet main structure pointer
sw_if_indexu32 interface handle
tosu8 ToS bits from the packet
timestampu64 timestamp, nanoseconds since 1/1/70
lengthu16 ip length of the packet
do_flushint 1 = flush all cached records, 0 = construct a record

Definition at line 96 of file node.c.

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void flowperpkt_flush_callback ( void  )

Definition at line 295 of file node.c.

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static uword flowperpkt_node_fn ( vlib_main_t vm,
vlib_node_runtime_t node,
vlib_frame_t frame 
)
static

Definition at line 312 of file node.c.

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

Definition at line 44 of file node.c.

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Variable Documentation

char* flowperpkt_error_strings[]
static
Initial value:
= {
#define _(sym,string)
}
#define foreach_flowperpkt_error
Definition: node.c:61

Definition at line 72 of file node.c.

vlib_node_registration_t flowperpkt_node
Initial value:
= {
.function = flowperpkt_node_fn,
.name = "flowperpkt",
.vector_size = sizeof (u32),
.format_trace = format_flowperpkt_trace,
.error_strings = flowperpkt_error_strings,
.n_next_nodes = FLOWPERPKT_N_NEXT,
.next_nodes = {
[FLOWPERPKT_NEXT_DROP] = "error-drop",
},
}
bad routing header type(not 4)") sr_error (NO_MORE_SEGMENTS
static u8 * format_flowperpkt_trace(u8 *s, va_list *args)
Definition: node.c:44
static char * flowperpkt_error_strings[]
Definition: node.c:72
static uword flowperpkt_node_fn(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
Definition: node.c:312
#define ARRAY_LEN(x)
Definition: clib.h:59
unsigned int u32
Definition: types.h:88

IPFIX flow-per-packet graph node.

Node Identifier:
flowperpkt

This is the IPFIX flow-record-per-packet node.

Parameters
vmvlib_main_t corresponding to the current thread.
nodevlib_node_runtime_t data for this node.
framevlib_frame_t whose contents should be dispatched.
Graph mechanics: buffer metadata, next index usage

Uses:

  • vnet_buffer(b)->ip.save_rewrite_length
    • tells the node the length of the rewrite which was applied in ip4/6_rewrite_inline, allows the code to find the IP header without having to parse L2 headers, or make stupid assumptions about their length.
  • vnet_buffer(b)->flags & VLIB_BUFFER_FLOW_REPORT
    • Used to suppress flow record generation for flow record packets.

Sets:

  • vnet_buffer(b)->flags & VLIB_BUFFER_FLOW_REPORT
    • To suppress flow record generation for flow record packets

Next Index:

  • Next configured output feature on the interface, usually "interface-output." Generated flow records head for ip4-lookup(constructor) VLIB_REGISTER_NODE (flowperpkt_node)

Definition at line 59 of file node.c.