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#ifndef SOCKS5_H
#define SOCKS5_H
#include <stdint.h>
#include "utils.h"
typedef struct socks5_method_req_t {
uint8_t ver;
uint8_t num_methods;
uint8_t methods[1]; // at least one
} PACKED socks5_method_req;
typedef struct socks5_method_reply_t {
uint8_t ver;
uint8_t method;
} PACKED socks5_method_reply;
static const int socks5_ver = 5;
static const int socks5_auth_none = 0x00;
static const int socks5_auth_gssapi = 0x01;
static const int socks5_auth_password = 0x02;
static const int socks5_auth_invalid = 0xFF;
typedef struct socks5_auth_reply_t {
uint8_t ver;
uint8_t status;
} PACKED socks5_auth_reply;
static const int socks5_password_ver = 0x01;
static const int socks5_password_passed = 0x00;
typedef struct socks5_addr_ipv4_t {
uint32_t addr;
uint16_t port;
} PACKED socks5_addr_ipv4;
typedef struct socks5_addr_domain_t {
uint8_t size;
uint8_t more[1];
/* uint16_t port; */
} PACKED socks5_addr_domain;
typedef struct socks5_addr_ipv6_t {
uint8_t addr[16];
uint16_t port;
} PACKED socks5_addr_ipv6;
typedef struct socks5_req_t {
uint8_t ver;
uint8_t cmd;
uint8_t reserved;
uint8_t addrtype;
/* socks5_addr_* */
} PACKED socks5_req;
typedef struct socks5_reply_t {
uint8_t ver;
uint8_t status;
uint8_t reserved;
uint8_t addrtype;
/* socks5_addr_* */
} PACKED socks5_reply;
typedef struct socks5_udp_preabmle_t {
uint16_t reserved;
uint8_t frag_no;
uint8_t addrtype; /* 0x01 for IPv4 */
/* socks5_addr_* */
socks5_addr_ipv4 ip; /* I support only IPv4 at the moment */
} PACKED socks5_udp_preabmle;
static const int socks5_reply_maxlen = 512; // as domain name can't be longer than 256 bytes
static const int socks5_addrtype_ipv4 = 1;
static const int socks5_addrtype_domain = 3;
static const int socks5_addrtype_ipv6 = 4;
static const int socks5_status_succeeded = 0;
static const int socks5_status_server_failure = 1;
static const int socks5_status_connection_not_allowed_by_ruleset = 2;
static const int socks5_status_Network_unreachable = 3;
static const int socks5_status_Host_unreachable = 4;
static const int socks5_status_Connection_refused = 5;
static const int socks5_status_TTL_expired = 6;
static const int socks5_status_Command_not_supported = 7;
static const int socks5_status_Address_type_not_supported = 8;
const char* socks5_status_to_str(int socks5_status);
int socks5_is_valid_cred(const char *login, const char *password);
struct evbuffer *socks5_mkmethods_plain(int do_password);
struct evbuffer *socks5_mkpassword_plain(const char *login, const char *password);
const char* socks5_is_known_auth_method(socks5_method_reply *reply, int do_password);
static const int socks5_cmd_connect = 1;
static const int socks5_cmd_bind = 2;
static const int socks5_cmd_udp_associate = 3;
struct evbuffer *socks5_mkcommand_plain(int socks5_cmd, const struct sockaddr_in *destaddr);
/* vim:set tabstop=4 softtabstop=4 shiftwidth=4: */
/* vim:set foldmethod=marker foldlevel=32 foldmarker={,}: */
#endif /* SOCKS5_H */
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