86 lines
2.0 KiB
C
86 lines
2.0 KiB
C
#ifndef _PACKET_PARSER_H
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#define _PACKET_PARSER_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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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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// 传输层
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LAYER_TYPE_UDP = 1 << 8,
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LAYER_TYPE_TCP = 1 << 9,
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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_G_VXLAN = 1 << 10,
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LAYER_TYPE_GTPV1_U = 1 << 11,
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// ALL
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LAYER_TYPE_ALL = (LAYER_TYPE_L2 | LAYER_TYPE_L2_TUN | LAYER_TYPE_L3 | LAYER_TYPE_L4 | LAYER_TYPE_G_VXLAN | LAYER_TYPE_GTPV1_U),
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// UNKNOWN
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LAYER_TYPE_UNKNOWN,
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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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uint16_t hdr_offset;
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uint16_t hdr_len;
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uint16_t pld_len;
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};
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struct parser_result
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{
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struct layer_record layers[16];
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uint16_t used;
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uint16_t size;
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};
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struct packet_parser
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{
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struct parser_result result;
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const void *packet_data;
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uint16_t packet_len;
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uint64_t packet_id;
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};
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void packet_parser_init(struct packet_parser *handler);
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const void *packet_parser_parse(struct packet_parser *handler, const void *packet_data, uint16_t packet_len, uint64_t packet_id); // return most inner payload
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const struct layer_record *packet_parser_get_most_inner(struct packet_parser *handler, enum layer_type type);
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const struct layer_record *packet_parser_get_most_outer(struct packet_parser *handler, enum layer_type type);
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// return 4: IPv4
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// return 6: IPv6
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uint8_t gtp_next_proto(const char *data);
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#ifdef __cpluscplus
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}
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#endif
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#endif
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