zapret/tpws/socks.h

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C
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2021-03-04 16:30:38 +05:00
#pragma once
#include <stdint.h>
#include <arpa/inet.h>
#pragma pack(push,1)
#define S4_CMD_CONNECT 1
#define S4_CMD_BIND 2
typedef struct
{
uint8_t ver,cmd;
uint16_t port;
uint32_t ip;
} s4_req;
#define S4_REQ_HEADER_VALID(r,l) (l>=sizeof(s4_req) && r->ver==4)
#define S4_REQ_CONNECT_VALID(r,l) (S4_REQ_HEADER_VALID(r,l) && r->cmd==S4_CMD_CONNECT)
#define S4_REP_OK 90
#define S4_REP_FAILED 91
typedef struct
{
uint8_t zero,rep;
uint16_t port;
uint32_t ip;
} s4_rep;
#define S5_AUTH_NONE 0
#define S5_AUTH_GSSAPI 1
#define S5_AUTH_USERPASS 2
#define S5_AUTH_UNACCEPTABLE 0xFF
typedef struct
{
uint8_t ver,nmethods,methods[255];
} s5_handshake;
#define S5_REQ_HANDHSHAKE_VALID(r,l) (l>=3 && r->ver==5 && r->nmethods && l>=(2+r->nmethods))
typedef struct
{
uint8_t ver,method;
} s5_handshake_ack;
#define S5_CMD_CONNECT 1
#define S5_CMD_BIND 2
#define S5_CMD_UDP_ASSOC 3
#define S5_ATYP_IP4 1
#define S5_ATYP_DOM 3
#define S5_ATYP_IP6 4
typedef struct
{
uint8_t ver,cmd,rsv,atyp;
union {
struct {
struct in_addr addr;
uint16_t port;
} d4;
struct {
struct in6_addr addr;
uint16_t port;
} d6;
struct {
uint8_t len;
char domport[255+2]; // max hostname + binary port
} dd;
};
} s5_req;
#define S5_REQ_HEADER_VALID(r,l) (l>=4 && r->ver==5)
#define S5_IP46_VALID(r,l) (r->atyp==S5_ATYP_IP4 && l>=(4+sizeof(r->d4)) || r->atyp==S5_ATYP_IP6 && l>=(4+sizeof(r->d6)))
#define S5_REQ_CONNECT_VALID(r,l) (S5_REQ_HEADER_VALID(r,l) && r->cmd==S5_CMD_CONNECT && (S5_IP46_VALID(r,l) || r->atyp==S5_ATYP_DOM && l>=5 && l>=(5+r->dd.len)))
#define S5_PORT_FROM_DD(r,l) (l>=(4+r->dd.len+2) ? ntohs(*(uint16_t*)(r->dd.domport+r->dd.len)) : 0)
#define S5_REP_OK 0
#define S5_REP_GENERAL_FAILURE 1
#define S5_REP_NOT_ALLOWED_BY_RULESET 2
#define S5_REP_NETWORK_UNREACHABLE 3
#define S5_REP_HOST_UNREACHABLE 4
#define S5_REP_CONN_REFUSED 5
#define S5_REP_TTL_EXPIRED 6
#define S5_REP_COMMAND_NOT_SUPPORTED 7
#define S5_REP_ADDR_TYPE_NOT_SUPPORTED 8
typedef struct
{
uint8_t ver,rep,rsv,atyp;
union {
struct {
struct in_addr addr;
uint16_t port;
} d4;
};
} s5_rep;
#pragma pack(pop)