70 lines
1.1 KiB
C
70 lines
1.1 KiB
C
#pragma once
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#include <sys/types.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <sys/socket.h>
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#include <unistd.h>
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#include <netdb.h>
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#include <string.h>
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#include "net_tools.h"
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enum cmd {
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CMD_CONNECT = 0x01,
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CMD_BIND = 0x02,
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CMD_UDP_ASSOCIATE = 0x03
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};
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enum atyp {
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ATYP_IPV4 = 0x01,
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ATYP_DOMAINNAME = 0x03,
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ATYP_IPV6 = 0x04
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};
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union socks5_addr {
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struct {
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uint8_t len;
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char* str;
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} dns;
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uint8_t ipv4[4];
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uint8_t ipv6[16];
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};
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/*
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* RFC 1928 Messages
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* https://tools.ietf.org/html/rfc1928
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*/
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struct client_handshake {
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uint8_t ver;
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uint8_t nmethods;
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uint8_t methods[255];
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};
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struct server_handshake {
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uint8_t ver;
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uint8_t method;
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};
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struct client_request {
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uint8_t ver;
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uint8_t cmd;
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uint8_t rsv;
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uint8_t atyp;
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uint8_t dst_addr_len;
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char* dst_addr;
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uint16_t port;
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};
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struct server_reply {
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uint8_t ver;
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uint8_t rep;
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uint8_t rsv;
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uint8_t atyp;
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union socks5_addr bind_addr;
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uint16_t port;
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};
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void socks5_handshake(int sock);
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void socks5_connect_dns(int sock, char* addr, uint16_t port);
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void socks5_reply(int sock);
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