doca_ar_conntrack.c File Reference

simple connection tracking table module for recording flow info and modifying headers of packets forwarded by software More...

#include "doca_ar_conntrack.h"
#include <rte_hash.h>
#include <rte_jhash.h>
#include <rte_hash_crc.h>
#include <rte_mempool.h>
#include <rte_malloc.h>
#include <rte_memcpy.h>

Functions
	DOCA_LOG_REGISTER (DOCA_AR_CONNTRACK)
uint32_t	myHash (const void *key, uint32_t key_len, uint32_t init_val)
	user-defined hash function,here we directly use the rss val precomputed by hardware as the result of hash function so that we can save the cpu cosumption
int	doca_ar_conntrack_init_env (int _maxConntrack)
	init connection tracking table and mempool
struct doca_ar_conn *	doca_ar_add_conn (struct doca_ar_conn_match *match, uint16_t bestPath)
	get conn from mempool and add conn into the conntrack table
void	doca_ar_del_conn (void *_conn)
	del conn from the conntrack table and put back to mempool
struct doca_ar_conn *	doca_ar_find_conn (struct doca_ar_conn_match *match)
	find the conn from conntrack table
int	doca_ar_parse_conn (struct doca_ar_conn_match *match, struct rte_mbuf *m)
	pasrse conn match from rte_mbuf
void	doca_ar_print_match (struct doca_ar_conn_match *match)
	debug api for pring match info
void	doca_ar_modify_conn (struct doca_ar_conn *conn, struct rte_mbuf *m)
	modify the sport of conn and offload cksum
void	doca_ar_dump_conn (struct cmdline *cl)
	iterate the whole conntrack table and print all conns info onto cmdline

Variables
struct rte_hash *	CT = NULL
struct rte_mempool *	CT_POOL = NULL
int	maxConntrack = 0

Detailed Description

simple connection tracking table module for recording flow info and modifying headers of packets forwarded by software

Author

Mark Chen (markc.nosp@m.hen7.nosp@m.7888@.nosp@m.gmai.nosp@m.l.com)

Version

1.0

Date

2024-01-07

Copyright

Copyright (c) 2024

Function Documentation

doca_ar_add_conn()

struct doca_ar_conn * doca_ar_add_conn	(	struct doca_ar_conn_match *	match,
		uint16_t	bestPath )

get conn from mempool and add conn into the conntrack table

Parameters

match
bestPath

Returns

struct doca_ar_conn*

doca_ar_conntrack_init_env()

int doca_ar_conntrack_init_env

(

int

maxConntrack

)

init connection tracking table and mempool

Parameters

maxConntrack

Returns

int

doca_ar_del_conn()

void doca_ar_del_conn

(

void *

conn

)

del conn from the conntrack table and put back to mempool

Parameters

conn

doca_ar_dump_conn()

void doca_ar_dump_conn

(

struct cmdline *

cl

)

iterate the whole conntrack table and print all conns info onto cmdline

Parameters

cl

doca_ar_find_conn()

struct doca_ar_conn * doca_ar_find_conn

(

struct doca_ar_conn_match *

match

)

find the conn from conntrack table

Parameters

match

Returns

struct doca_ar_conn*

doca_ar_modify_conn()

void doca_ar_modify_conn	(	struct doca_ar_conn *	conn,
		struct rte_mbuf *	m )

modify the sport of conn and offload cksum

Parameters

conn
m

doca_ar_parse_conn()

int doca_ar_parse_conn	(	struct doca_ar_conn_match *	match,
		struct rte_mbuf *	m )

pasrse conn match from rte_mbuf

Parameters

match
m

Returns

int

doca_ar_print_match()

void doca_ar_print_match

(

struct doca_ar_conn_match *

match

)

debug api for pring match info

Parameters

match

DOCA_LOG_REGISTER()

DOCA_LOG_REGISTER

(

DOCA_AR_CONNTRACK

)

myHash()

uint32_t myHash	(	const void *	key,
		uint32_t	key_len,
		uint32_t	init_val )

user-defined hash function,here we directly use the rss val precomputed by hardware as the result of hash function so that we can save the cpu cosumption

Parameters

key
key_len
init_val

Returns

uint32_t

Variable Documentation

CT

struct rte_hash* CT = NULL

CT_POOL

struct rte_mempool* CT_POOL = NULL

maxConntrack

int maxConntrack = 0