109 lines
2.9 KiB
C
109 lines
2.9 KiB
C
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#ifndef _PACKET_H
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#define _PACKET_H
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#ifdef __cpluscplus
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extern "C"
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{
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#endif
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#include <stdint.h>
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#include <stdio.h>
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#include "tuple.h"
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enum layer_type
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{
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// 数据链路层
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LAYER_TYPE_ETHER = 1 << 0,
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LAYER_TYPE_PPP = 1 << 1,
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LAYER_TYPE_HDLC = 1 << 2,
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LAYER_TYPE_L2 = (LAYER_TYPE_ETHER | LAYER_TYPE_PPP | LAYER_TYPE_HDLC),
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// 数据链路层 -- 隧道
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LAYER_TYPE_VLAN = 1 << 3,
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LAYER_TYPE_PPPOE = 1 << 4,
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LAYER_TYPE_MPLS = 1 << 5,
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LAYER_TYPE_L2_TUN = (LAYER_TYPE_VLAN | LAYER_TYPE_PPPOE | LAYER_TYPE_MPLS),
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// 网络层
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LAYER_TYPE_IPV4 = 1 << 6,
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LAYER_TYPE_IPV6 = 1 << 7,
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LAYER_TYPE_L3 = (LAYER_TYPE_IPV4 | LAYER_TYPE_IPV6),
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// 网络层 -- 隧道
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LAYER_TYPE_GRE = 1 << 8,
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LAYER_TYPE_L3_TUN = (LAYER_TYPE_GRE),
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// 传输层
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LAYER_TYPE_UDP = 1 << 9,
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LAYER_TYPE_TCP = 1 << 10,
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LAYER_TYPE_L4 = (LAYER_TYPE_UDP | LAYER_TYPE_TCP),
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// 传输层 -- 隧道
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LAYER_TYPE_VXLAN = 1 << 11,
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LAYER_TYPE_GTPV1_U = 1 << 12,
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// ALL
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LAYER_TYPE_ALL = (LAYER_TYPE_L2 | LAYER_TYPE_L2_TUN | LAYER_TYPE_L3 | LAYER_TYPE_L3_TUN | LAYER_TYPE_L4 | LAYER_TYPE_VXLAN | LAYER_TYPE_GTPV1_U),
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};
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enum ldbc_method
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{
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LDBC_METHOD_HASH_INT_IP = 1,
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LDBC_METHOD_HASH_EXT_IP = 2,
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LDBC_METHOD_HASH_INT_IP_AND_EXT_IP = 3,
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LDBC_METHOD_HASH_INNERMOST_INT_IP = 4,
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LDBC_METHOD_HASH_INNERMOST_EXT_IP = 5,
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};
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struct layer_record
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{
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enum layer_type type;
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const char *hdr_ptr; // header pointer
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const char *pld_ptr; // payload pointer
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uint16_t hdr_offset; // header offset from data_ptr
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uint16_t hdr_len; // header length
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uint16_t pld_len; // payload length
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};
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#define PACKET_MAX_LAYERS 16
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struct packet
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{
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struct layer_record layers[PACKET_MAX_LAYERS];
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int8_t layers_used;
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int8_t layers_size;
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const char *data_ptr;
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uint16_t data_len;
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};
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#define PACKET_LOG_ERROR(format, ...) void(0)
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#ifndef PACKET_LOG_ERROR
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#define PACKET_LOG_ERROR(format, ...) \
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fprintf(stderr, "ERROR " format "\n", ##__VA_ARGS__);
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#endif
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// return innermost payload
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const char *packet_parse(struct packet *handler, const char *data, uint16_t len);
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void packet_print(const struct packet *handler);
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// return 0 : found
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// return -1 : not found
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int packet_get_innermost_four_tuple(const struct packet *handler, struct four_tuple *tuple);
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int packet_get_outermost_four_tuple(const struct packet *handler, struct four_tuple *tuple);
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// return 0 : found
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// return -1 : not found
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int packet_get_innermost_two_tuple(const struct packet *handler, struct two_tuple *tuple);
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int packet_get_outermost_two_tuple(const struct packet *handler, struct two_tuple *tuple);
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const struct layer_record *packet_get_innermost_layer(const struct packet *handler, enum layer_type type);
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const struct layer_record *packet_get_outermost_layer(const struct packet *handler, enum layer_type type);
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uint64_t packet_get_hash(const struct packet *handler, enum ldbc_method method, int dir_is_i2e);
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#ifdef __cpluscplus
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}
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#endif
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#endif
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