/*
  youtubeUnblock - https://github.com/Waujito/youtubeUnblock

  Copyright (C) 2024-2025 Vadim Vetrov <vetrovvd@gmail.com>

  This program is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.
  
  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.
  
  You should have received a copy of the GNU General Public License
  along with this program.  If not, see <https://www.gnu.org/licenses/>.
*/

#ifndef YU_MANGLE_H
#define YU_MANGLE_H

#include "types.h"
#include "tls.h"
#include "config.h"

#define PKT_ACCEPT	0
#define PKT_DROP	1
// Used for section config
#define PKT_CONTINUE	2

/**
 * Processes the packet and returns verdict.
 * This is the primary function that traverses the packet.
 */
int process_packet(const struct config_t *config, const struct packet_data *pd);


/**
 * Processe the TCP packet.
 * Returns verdict.
 */
int process_tcp_packet(const struct section_config_t *section, const uint8_t *raw_payload, size_t raw_payload_len);


/**
 * Processes the UDP packet.
 * Returns verdict.
 */
int process_udp_packet(const struct section_config_t *section, const uint8_t *pkt, size_t pktlen);



/**
 * Sends fake client hello.
 */
int post_fake_sni(struct fake_type f_type, 
		const void *iph, unsigned int iph_len, 
		const struct tcphdr *tcph, unsigned int tcph_len);

/**
 * Splits packet by poses and posts.
 * Poses are relative to start of TCP payload.
 * dvs used internally and should be zero.
 */
int send_tcp_frags(const struct section_config_t *section,
	const uint8_t *packet, size_t pktlen, 
	const size_t *poses, size_t poses_len, size_t dvs);

/**
 * Splits packet by poses and posts.
 * Poses are relative to start of TCP payload.
 * dvs used internally and should be zero.
 */
int send_ip4_frags(const struct section_config_t *section,
	const uint8_t *packet, size_t pktlen, 
	const size_t *poses, size_t poses_len, size_t dvs);
#endif /* YU_MANGLE_H */