2009-03-13 03:14:47 +00:00
|
|
|
/*
|
2009-03-14 07:35:49 +00:00
|
|
|
* Sean Middleditch
|
|
|
|
* sean@sourcemud.org
|
|
|
|
*
|
2009-03-13 03:14:47 +00:00
|
|
|
* The author or authors of this code dedicate any and all copyright interest
|
|
|
|
* in this code to the public domain. We make this dedication for the benefit
|
|
|
|
* of the public at large and to the detriment of our heirs and successors. We
|
|
|
|
* intend this dedication to be an overt act of relinquishment in perpetuity of
|
|
|
|
* all present and future rights to this code under copyright law.
|
|
|
|
*/
|
|
|
|
|
2009-03-13 03:27:35 +00:00
|
|
|
#if !defined(LIBTELNET_INCLUDE)
|
2009-03-14 22:31:26 +00:00
|
|
|
#define LIBTELNET_INCLUDE 1
|
2009-03-13 03:27:35 +00:00
|
|
|
|
2009-03-13 03:14:47 +00:00
|
|
|
/* telnet special values */
|
|
|
|
#define LIBTELNET_IAC 255
|
|
|
|
#define LIBTELNET_DONT 254
|
|
|
|
#define LIBTELNET_DO 253
|
|
|
|
#define LIBTELNET_WONT 252
|
|
|
|
#define LIBTELNET_WILL 251
|
|
|
|
#define LIBTELNET_SB 250
|
2009-03-14 22:30:57 +00:00
|
|
|
#define LIBTELNET_SB 250
|
|
|
|
#define LIBTELNET_GA 249
|
|
|
|
#define LIBTELNET_EL 248
|
|
|
|
#define LIBTELNET_EC 247
|
|
|
|
#define LIBTELNET_AYT 246
|
|
|
|
#define LIBTELNET_AO 245
|
|
|
|
#define LIBTELNET_IP 244
|
|
|
|
#define LIBTELNET_BREAK 243
|
|
|
|
#define LIBTELNET_DM 242
|
|
|
|
#define LIBTELNET_NOP 241
|
2009-03-13 03:14:47 +00:00
|
|
|
#define LIBTELNET_SE 240
|
2009-03-14 22:30:57 +00:00
|
|
|
#define LIBTELNET_EOR 239
|
|
|
|
#define LIBTELNET_ABORT 238
|
|
|
|
#define LIBTELNET_SUSP 237
|
|
|
|
#define LIBTELNET_EOF 236
|
2009-03-13 03:14:47 +00:00
|
|
|
|
|
|
|
/* telnet options */
|
2009-03-14 22:30:57 +00:00
|
|
|
#define LIBTELNET_TELOPT_BINARY 0
|
|
|
|
#define LIBTELNET_TELOPT_ECHO 1
|
|
|
|
#define LIBTELNET_TELOPT_RCP 2
|
|
|
|
#define LIBTELNET_TELOPT_SGA 3
|
|
|
|
#define LIBTELNET_TELOPT_NAMS 4
|
|
|
|
#define LIBTELNET_TELOPT_STATUS 5
|
|
|
|
#define LIBTELNET_TELOPT_TM 6
|
|
|
|
#define LIBTELNET_TELOPT_RCTE 7
|
|
|
|
#define LIBTELNET_TELOPT_NAOL 8
|
|
|
|
#define LIBTELNET_TELOPT_NAOP 9
|
|
|
|
#define LIBTELNET_TELOPT_NAOCRD 10
|
|
|
|
#define LIBTELNET_TELOPT_NAOHTS 11
|
|
|
|
#define LIBTELNET_TELOPT_NAOHTD 12
|
|
|
|
#define LIBTELNET_TELOPT_NAOFFD 13
|
|
|
|
#define LIBTELNET_TELOPT_NAOVTS 14
|
|
|
|
#define LIBTELNET_TELOPT_NAOVTD 15
|
|
|
|
#define LIBTELNET_TELOPT_NAOLFD 16
|
|
|
|
#define LIBTELNET_TELOPT_XASCII 17
|
|
|
|
#define LIBTELNET_TELOPT_LOGOUT 18
|
|
|
|
#define LIBTELNET_TELOPT_BM 19
|
|
|
|
#define LIBTELNET_TELOPT_DET 20
|
|
|
|
#define LIBTELNET_TELOPT_SUPDUP 21
|
|
|
|
#define LIBTELNET_TELOPT_SUPDUPOUTPUT 22
|
|
|
|
#define LIBTELNET_TELOPT_SNDLOC 23
|
|
|
|
#define LIBTELNET_TELOPT_TTYPE 24
|
|
|
|
#define LIBTELNET_TELOPT_EOR 25
|
|
|
|
#define LIBTELNET_TELOPT_TUID 26
|
|
|
|
#define LIBTELNET_TELOPT_OUTMRK 27
|
|
|
|
#define LIBTELNET_TELOPT_TTYLOC 28
|
|
|
|
#define LIBTELNET_TELOPT_3270REGIME 29
|
|
|
|
#define LIBTELNET_TELOPT_X3PAD 30
|
|
|
|
#define LIBTELNET_TELOPT_NAWS 31
|
|
|
|
#define LIBTELNET_TELOPT_TSPEED 32
|
|
|
|
#define LIBTELNET_TELOPT_LFLOW 33
|
|
|
|
#define LIBTELNET_TELOPT_LINEMODE 34
|
|
|
|
#define LIBTELNET_TELOPT_XDISPLOC 35
|
|
|
|
#define LIBTELNET_TELOPT_ENVIRON 36
|
|
|
|
#define LIBTELNET_TELOPT_AUTHENTICATION 37
|
|
|
|
#define LIBTELNET_TELOPT_ENCRYPT 38
|
|
|
|
#define LIBTELNET_TELOPT_NEW_ENVIRON 39
|
|
|
|
#define LIBTELNET_TELOPT_COMPRESS 85
|
|
|
|
#define LIBTELNET_TELOPT_COMPRESS2 86
|
|
|
|
#define LIBTELNET_TELOPT_ZMP 93
|
|
|
|
#define LIBTELNET_TELOPT_EXOPL 255
|
2009-03-13 03:14:47 +00:00
|
|
|
|
2009-03-14 08:57:27 +00:00
|
|
|
/* libtelnet modes */
|
|
|
|
enum libtelnet_mode_t {
|
|
|
|
LIBTELNET_MODE_SERVER = 0,
|
|
|
|
LIBTELNET_MODE_CLIENT
|
|
|
|
};
|
|
|
|
|
2009-03-13 03:14:47 +00:00
|
|
|
/* telnet states */
|
|
|
|
enum libtelnet_state_t {
|
2009-03-14 07:35:49 +00:00
|
|
|
LIBTELNET_STATE_DATA = 0,
|
2009-03-13 03:14:47 +00:00
|
|
|
LIBTELNET_STATE_IAC,
|
|
|
|
LIBTELNET_STATE_DO,
|
|
|
|
LIBTELNET_STATE_DONT,
|
|
|
|
LIBTELNET_STATE_WILL,
|
|
|
|
LIBTELNET_STATE_WONT,
|
|
|
|
LIBTELNET_STATE_SB,
|
2009-03-14 08:57:27 +00:00
|
|
|
LIBTELNET_STATE_SB_IAC
|
2009-03-13 03:14:47 +00:00
|
|
|
};
|
|
|
|
|
|
|
|
/* error codes */
|
|
|
|
enum libtelnet_error_t {
|
|
|
|
LIBTELNET_ERROR_OK = 0,
|
2009-03-13 03:26:34 +00:00
|
|
|
LIBTELNET_ERROR_NOMEM, /* memory allocation failure */
|
2009-03-14 05:26:43 +00:00
|
|
|
LIBTELNET_ERROR_OVERFLOW, /* data exceeds buffer size */
|
2009-03-13 03:14:47 +00:00
|
|
|
LIBTELNET_ERROR_PROTOCOL, /* invalid sequence of special bytes */
|
2009-03-14 08:57:27 +00:00
|
|
|
LIBTELNET_ERROR_UNKNOWN /* some crazy unexplainable unknown error */
|
2009-03-13 03:14:47 +00:00
|
|
|
};
|
|
|
|
|
|
|
|
/* state tracker */
|
|
|
|
struct libtelnet_t {
|
2009-03-14 07:35:49 +00:00
|
|
|
/* zlib (mccp2) compression */
|
|
|
|
#ifdef HAVE_ZLIB
|
|
|
|
z_stream *zlib;
|
|
|
|
#endif
|
2009-03-13 03:14:47 +00:00
|
|
|
/* sub-request buffer */
|
2009-03-14 02:48:05 +00:00
|
|
|
unsigned char *buffer;
|
2009-03-13 03:14:47 +00:00
|
|
|
/* current size of the buffer */
|
2009-03-14 02:48:05 +00:00
|
|
|
unsigned int size;
|
2009-03-13 03:14:47 +00:00
|
|
|
/* length of data in the buffer */
|
2009-03-14 02:48:05 +00:00
|
|
|
unsigned int length;
|
|
|
|
/* current state */
|
|
|
|
enum libtelnet_state_t state;
|
2009-03-14 08:57:27 +00:00
|
|
|
/* processing mode */
|
|
|
|
enum libtelnet_mode_t mode;
|
2009-03-13 03:14:47 +00:00
|
|
|
};
|
|
|
|
|
2009-03-14 02:48:05 +00:00
|
|
|
/* libtelnet callback declarations
|
|
|
|
* APPLICATION MUST IMPLEMENT THESE FUNCTIONS!!
|
|
|
|
*/
|
2009-03-14 05:26:43 +00:00
|
|
|
extern void libtelnet_data_cb(struct libtelnet_t *telnet,
|
2009-03-14 08:57:27 +00:00
|
|
|
unsigned char *buffer, unsigned int size, void *user_data);
|
2009-03-14 05:26:43 +00:00
|
|
|
extern void libtelnet_send_cb(struct libtelnet_t *telnet,
|
2009-03-14 08:57:27 +00:00
|
|
|
unsigned char *buffer, unsigned int size, void *user_data);
|
2009-03-14 02:48:05 +00:00
|
|
|
extern void libtelnet_command_cb(struct libtelnet_t *telnet,
|
2009-03-14 08:57:27 +00:00
|
|
|
unsigned char cmd, void *user_data);
|
2009-03-14 02:48:05 +00:00
|
|
|
extern void libtelnet_negotiate_cb(struct libtelnet_t *telnet,
|
2009-03-14 08:57:27 +00:00
|
|
|
unsigned char cmd, unsigned char opt, void *user_data);
|
2009-03-14 17:06:47 +00:00
|
|
|
extern void libtelnet_subnegotiation_cb(struct libtelnet_t *telnet,
|
2009-03-14 17:23:33 +00:00
|
|
|
unsigned char opt, unsigned char *data, unsigned int size,
|
2009-03-14 08:57:27 +00:00
|
|
|
void *user_data);
|
|
|
|
#ifdef HAVE_ZLIB
|
|
|
|
extern void libtelnet_compress_cb(struct libtelnet_t *telnet,
|
|
|
|
char enabled, void *user_data);
|
|
|
|
#endif
|
2009-03-14 02:48:05 +00:00
|
|
|
extern void libtelnet_error_cb(struct libtelnet_t *telnet,
|
2009-03-14 08:57:27 +00:00
|
|
|
enum libtelnet_error_t error, void *user_data);
|
2009-03-14 02:48:05 +00:00
|
|
|
|
2009-03-13 03:14:47 +00:00
|
|
|
/* initialize a telnet state tracker */
|
2009-03-14 08:57:27 +00:00
|
|
|
extern void libtelnet_init(struct libtelnet_t *telnet,
|
|
|
|
enum libtelnet_mode_t mode);
|
2009-03-13 03:14:47 +00:00
|
|
|
|
|
|
|
/* free up any memory allocated by a state tracker */
|
2009-03-14 00:15:59 +00:00
|
|
|
extern void libtelnet_free(struct libtelnet_t *telnet);
|
2009-03-13 03:14:47 +00:00
|
|
|
|
|
|
|
/* push a byte buffer into the state tracker */
|
2009-03-14 03:39:18 +00:00
|
|
|
extern void libtelnet_push(struct libtelnet_t *telnet,
|
2009-03-14 08:57:27 +00:00
|
|
|
unsigned char *buffer, unsigned int size, void *user_data);
|
2009-03-13 03:14:47 +00:00
|
|
|
|
|
|
|
/* send an iac command */
|
2009-03-13 03:26:34 +00:00
|
|
|
extern void libtelnet_send_command(struct libtelnet_t *telnet,
|
2009-03-14 08:57:27 +00:00
|
|
|
unsigned char cmd, void *user_data);
|
2009-03-13 03:14:47 +00:00
|
|
|
|
|
|
|
/* send negotiation */
|
2009-03-13 03:26:34 +00:00
|
|
|
extern void libtelnet_send_negotiate(struct libtelnet_t *telnet,
|
2009-03-14 08:57:27 +00:00
|
|
|
unsigned char cmd, unsigned char opt, void *user_data);
|
2009-03-13 03:14:47 +00:00
|
|
|
|
|
|
|
/* send non-command data (escapes IAC bytes) */
|
2009-03-13 03:26:34 +00:00
|
|
|
extern void libtelnet_send_data(struct libtelnet_t *telnet,
|
2009-03-14 08:57:27 +00:00
|
|
|
unsigned char *buffer, unsigned int size, void *user_data);
|
2009-03-13 03:14:47 +00:00
|
|
|
|
|
|
|
/* send sub-request */
|
2009-03-14 17:06:47 +00:00
|
|
|
extern void libtelnet_send_subnegotiation(struct libtelnet_t *telnet,
|
2009-03-14 17:23:33 +00:00
|
|
|
unsigned char opt, unsigned char *buffer, unsigned int size,
|
2009-03-14 08:57:27 +00:00
|
|
|
void *user_data);
|
2009-03-13 03:27:35 +00:00
|
|
|
|
|
|
|
#endif /* !defined(LIBTELNET_INCLUDE) */
|