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ddb0dcd2fd
* Increase default maximum size of brtie dictionary to 128m ips pbuilder: use newer cmake on ubuntu trusty * no cmake
160 lines
2.7 KiB
C++
160 lines
2.7 KiB
C++
#pragma once
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#if defined (__cplusplus)
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extern "C" {
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#endif
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#include <stdlib.h>
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#include <stdint.h>
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/**
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* In btrie, each leaf means one bit in ip tree.
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* Left means 0, and right means 1.
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*/
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#define BTRIE_NULL (uintptr_t) -1
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#if !defined(BTRIE_MAX_PAGES)
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/// 54 ip per page. 8 bytes memory per page when empty
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#define BTRIE_MAX_PAGES 1024 * 2048 /// 128m ips , ~16mb ram when empty
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// #define BTRIE_MAX_PAGES 1024 * 65535 /// 4g ips (whole ipv4), ~512mb ram when empty
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#endif
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typedef struct btrie_node_s btrie_node_t;
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struct btrie_node_s {
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btrie_node_t *right;
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btrie_node_t *left;
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btrie_node_t *parent;
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uintptr_t value;
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};
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typedef struct btrie_s {
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btrie_node_t *root;
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btrie_node_t *free; /* free list of btrie */
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char *start;
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size_t size;
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/*
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* memory pool.
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* memory management(esp free) will be so easy by using this facility.
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*/
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char *pools[BTRIE_MAX_PAGES];
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size_t len;
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} btrie_t;
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/**
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* Create an empty btrie
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*
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* @Return:
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* An ip radix_tree created.
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* NULL if creation failed.
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*/
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btrie_t *btrie_create();
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/**
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* Destroy the ip radix_tree
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*
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* @Return:
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* OK if deletion succeed.
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* ERROR if error occurs while deleting.
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*/
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int btrie_destroy(btrie_t *tree);
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/**
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* Count the nodes in the radix tree.
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*/
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size_t btrie_count(btrie_t *tree);
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/**
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* Return the allocated number of bytes.
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*/
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size_t btrie_allocated(btrie_t *tree);
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/**
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* Add an ipv4 into btrie
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*
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* @Args:
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* key: ip address
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* mask: key's mask
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* value: value of this IP, may be NULL.
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*
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* @Return:
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* OK for success.
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* ERROR for failure.
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*/
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int btrie_insert(btrie_t *tree, uint32_t key, uint32_t mask,
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uintptr_t value);
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/**
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* Delete an ipv4 from btrie
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*
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* @Args:
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*
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* @Return:
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* OK for success.
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* ERROR for failure.
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*/
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int btrie_delete(btrie_t *tree, uint32_t key, uint32_t mask);
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/**
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* Find an ipv4 from btrie
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*
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* @Args:
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*
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* @Return:
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* Value if succeed.
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* NULL if failed.
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*/
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uintptr_t btrie_find(btrie_t *tree, uint32_t key);
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/**
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* Add an ipv6 into btrie
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*
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* @Args:
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* key: ip address
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* mask: key's mask
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* value: value of this IP, may be NULL.
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*
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* @Return:
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* OK for success.
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* ERROR for failure.
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*/
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int btrie_insert_a6(btrie_t *tree, const uint8_t *key, const uint8_t *mask,
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uintptr_t value);
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/**
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* Delete an ipv6 from btrie
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*
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* @Args:
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*
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* @Return:
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* OK for success.
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* ERROR for failure.
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*/
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int btrie_delete_a6(btrie_t *tree, const uint8_t *key, const uint8_t *mask);
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/**
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* Find an ipv6 from btrie
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*
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* @Args:
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*
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* @Return:
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* Value if succeed.
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* NULL if failed.
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*/
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uintptr_t btrie_find_a6(btrie_t *tree, const uint8_t *key);
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#if defined (__cplusplus)
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}
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#endif |