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Vector Packet Processing
adj_midchain.h File Reference
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Functions

void adj_nbr_midchain_update_rewrite (adj_index_t adj_index, adj_midchain_fixup_t fixup, const void *fixup_data, adj_flags_t flags, u8 *rewrite)
 Midchain Adjacency sub-type. More...
 
void adj_nbr_midchain_stack (adj_index_t adj_index, const dpo_id_t *dpo)
 [re]stack a midchain. More...
 
void adj_nbr_midchain_unstack (adj_index_t adj_index)
 unstack a midchain. More...
 
void adj_midchain_module_init (void)
 Module initialisation. More...
 
u8format_adj_midchain (u8 *s, va_list *ap)
 Format a midchain adjacency. More...
 

Function Documentation

void adj_midchain_module_init ( void  )

Module initialisation.

Definition at line 671 of file adj_midchain.c.

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void adj_nbr_midchain_stack ( adj_index_t  adj_index,
const dpo_id_t next 
)

[re]stack a midchain.

'Stacking' is the act of forming parent-child relationships in the data-plane graph.

Parameters
adj_indexThe index of the midchain to stack
dpoThe parent DPO to stack onto (i.e. become a child of).

[re]stack a midchain.

Definition at line 571 of file adj_midchain.c.

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void adj_nbr_midchain_unstack ( adj_index_t  adj_index)

unstack a midchain.

This will break the chain between the midchain and the next graph section. This is a implemented as stack-on-drop

Parameters
adj_indexThe index of the midchain to stack

unstack a midchain.

Unstack the adj. stack it on drop

Definition at line 549 of file adj_midchain.c.

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void adj_nbr_midchain_update_rewrite ( adj_index_t  adj_index,
adj_midchain_fixup_t  fixup,
const void *  fixup_data,
adj_flags_t  flags,
u8 rewrite 
)

Midchain Adjacency sub-type.

These adjs represent an L3 peer on a tunnel interface. The tunnel's adjacency is thus not the end of the chain, and needs to stack on/link to another chain (or portion of the graph) to reach the tunnel's destination.

Convert an existing neighbour adjacency into a midchain

Parameters
adj_indexThe index of the neighbour adjacency.
fixupThe function that will be invoked at paket switch time to 'fixup' the rewrite applied with necessary per-packet info (i.e. length, checksums).
fixup_dataContext data set by the caller that is provided as an argument in the fixup function.
flagsFlags controlling the adjacency behaviour
rewriteThe rewrite.

Midchain Adjacency sub-type.

Update the adjacency's rewrite string. A NULL string implies the rewrite is reset (i.e. when ARP/ND etnry is gone). NB: the adj being updated may be handling traffic in the DP.

Definition at line 506 of file adj_midchain.c.

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u8* format_adj_midchain ( u8 s,
va_list *  ap 
)

Format a midchain adjacency.

Definition at line 589 of file adj_midchain.c.

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