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/* Copyright StrongLoop, Inc. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#ifndef S5_H_
#define S5_H_
#include <stddef.h>
#include <stdint.h>
#define S5_ERR_MAP(V) \
V(-1, bad_version, "Bad protocol version.") \
V(-2, bad_cmd, "Bad protocol command.") \
V(-3, bad_atyp, "Bad address type.") \
V(0, ok, "No error.") \
V(1, auth_select, "Select authentication method.") \
V(2, auth_verify, "Verify authentication.") \
V(3, exec_cmd, "Execute command.") \
typedef enum {
#define S5_ERR_GEN(code, name, _) s5_ ## name = code,
S5_ERR_MAP(S5_ERR_GEN)
#undef S5_ERR_GEN
s5_max_errors
} s5_err;
typedef enum {
S5_AUTH_NONE = 1 << 0,
S5_AUTH_GSSAPI = 1 << 1,
S5_AUTH_PASSWD = 1 << 2
} s5_auth_method;
typedef enum {
s5_auth_allow,
s5_auth_deny
} s5_auth_result;
typedef enum {
s5_atyp_ipv4,
s5_atyp_ipv6,
s5_atyp_host
} s5_atyp;
typedef enum {
s5_cmd_tcp_connect,
s5_cmd_tcp_bind,
s5_cmd_udp_assoc
} s5_cmd;
typedef struct {
uint32_t arg0; /* Scratch space for the state machine. */
uint32_t arg1; /* Scratch space for the state machine. */
uint8_t state;
uint8_t methods;
uint8_t cmd;
uint8_t atyp;
uint8_t userlen;
uint8_t passlen;
uint16_t dport;
uint8_t username[257];
uint8_t password[257];
uint8_t daddr[257]; /* TODO(bnoordhuis) Merge with username/password. */
} s5_ctx;
void s5_init(s5_ctx *ctx);
s5_err s5_parse(s5_ctx *cx, uint8_t **data, size_t *size);
/* Only call after s5_parse() has returned s5_want_auth_method. */
unsigned int s5_auth_methods(const s5_ctx *cx);
/* Call after s5_parse() has returned s5_want_auth_method. */
int s5_select_auth(s5_ctx *cx, s5_auth_method method);
const char *s5_strerror(s5_err err);
#endif /* S5_H_ */