mirror of
https://github.com/bol-van/zapret.git
synced 2025-04-30 10:53:02 +03:00
98 lines
2.3 KiB
C
98 lines
2.3 KiB
C
#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)
|