mirror of
https://github.com/Waujito/youtubeUnblock.git
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83 lines
2.0 KiB
C
83 lines
2.0 KiB
C
#ifndef YU_MANGLE_H
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#define YU_MANGLE_H
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#include "types.h"
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/**
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* Result of analyze_tls_data function
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*/
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struct tls_verdict {
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int target_sni; /* google video hello packet */
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int sni_offset; /* offset from start of tcp _payload_ */
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int sni_len;
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};
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/**
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* Processes the packet and finds TLS Client Hello information inside it.
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* data pointer points to start of TLS Message (TCP Payload)
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*/
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struct tls_verdict analyze_tls_data(const uint8_t *data, uint32_t dlen);
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/**
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* Generates fake client hello message
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*/
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int gen_fake_sni(const void *iph, uint32_t iph_len,
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const struct tcphdr *tcph, uint32_t tcph_len,
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uint8_t *buf, uint32_t *buflen);
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/**
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* Invalidates the raw packet. The function aims to invalid the packet
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* in such way as it will be accepted by DPI, but dropped by target server
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*/
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int fail_packet(uint8_t *payload, uint32_t *plen, uint32_t avail_buflen);
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#define PKT_ACCEPT 0
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#define PKT_DROP 1
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/**
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* Processes the packet and returns verdict.
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* This is the primary function that traverses the packet.
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*/
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int process_packet(const uint8_t *packet, uint32_t packet_len);
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/**
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* Processe the TCP packet.
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* Returns verdict.
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*/
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int process_tcp_packet(const uint8_t *raw_payload, uint32_t raw_payload_len);
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/**
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* Processes the UDP packet.
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* Returns verdict.
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*/
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int process_udp_packet(const uint8_t *pkt, uint32_t pktlen);
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/**
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* Sends fake client hello.
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*/
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int post_fake_sni(const void *iph, unsigned int iph_len,
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const struct tcphdr *tcph, unsigned int tcph_len,
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unsigned char sequence_len);
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/**
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* Splits packet by poses and posts.
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* Poses are relative to start of TCP payload.
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* dvs used internally and should be zero.
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*/
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int send_tcp_frags(
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const uint8_t *packet, uint32_t pktlen,
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const uint32_t *poses, uint32_t poses_len, uint32_t dvs);
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/**
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* Splits packet by poses and posts.
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* Poses are relative to start of TCP payload.
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* dvs used internally and should be zero.
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*/
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int send_ip4_frags(
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const uint8_t *packet, uint32_t pktlen,
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const uint32_t *poses, uint32_t poses_len, uint32_t dvs);
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#endif /* YU_MANGLE_H */
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