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proxy.h
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proxy.h
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// SPDX-License-Identifier: GPL-3.0-only
/*
* Copyright (c) 2023 Dengfeng Liu <[email protected]>
*/
#ifndef XFRPC_PROXY_H
#define XFRPC_PROXY_H
#include <stdint.h>
#include <event2/bufferevent.h>
#include <event2/buffer.h>
#include <event2/listener.h>
#include <event2/util.h>
#include <event2/event.h>
#include "client.h"
#include "common.h"
#include "tcpmux.h"
#include "msg.h"
#define IP_LEN 16
// FTP passive mode related structures
struct ftp_pasv {
int code;
char ftp_server_ip[IP_LEN];
int ftp_server_port;
};
// Generic proxy structure
struct proxy {
struct bufferevent *bev;
char *proxy_name;
int remote_data_port; // Used in FTP proxy
};
// Proxy object management functions
struct proxy *new_proxy_obj(struct bufferevent *bev);
void free_proxy_obj(struct proxy *p);
// TCP proxy callbacks
void tcp_proxy_c2s_cb(struct bufferevent *bev, void *ctx);
void tcp_proxy_s2c_cb(struct bufferevent *bev, void *ctx);
// FTP proxy callbacks and helpers
void ftp_proxy_c2s_cb(struct bufferevent *bev, void *ctx);
void ftp_proxy_s2c_cb(struct bufferevent *bev, void *ctx);
void set_ftp_data_proxy_tunnel(const char *ftp_proxy_name,
struct ftp_pasv *local_fp,
struct ftp_pasv *remote_fp);
// UDP proxy callbacks
void udp_proxy_c2s_cb(struct bufferevent *bev, void *ctx);
void udp_proxy_s2c_cb(struct bufferevent *bev, void *ctx);
void handle_udp_packet(struct udp_packet *udp_pkt, struct proxy_client *client);
// SOCKS protocol handlers
uint32_t handle_socks5(struct proxy_client *client, struct ring_buffer *rb, int len);
uint32_t handle_ss5(struct proxy_client *client, struct ring_buffer *rb, int len);
#endif //XFRPC_PROXY_H