git.distorted.org.uk Git - u/mdw/putty/blame_incremental

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Commit	Line	Data
	1	#include <windows.h>
	2	#include <stdio.h>
	3	#include <stdlib.h>
	4	#include <ctype.h>
	5
	6	#include "putty.h"
	7
	8	#ifndef FALSE
	9	#define FALSE 0
	10	#endif
	11	#ifndef TRUE
	12	#define TRUE 1
	13	#endif
	14
	15	static Socket s = NULL;
	16
	17	static void rlogin_size(void);
	18
	19	static int sb_opt, sb_len;
	20	static char *sb_buf = NULL;
	21	static int sb_size = 0;
	22	#define SB_DELTA 1024
	23
	24	static void c_write(char *buf, int len)
	25	{
	26	from_backend(0, buf, len);
	27	}
	28
	29	static int rlogin_closing(Plug plug, char *error_msg, int error_code,
	30	int calling_back)
	31	{
	32	sk_close(s);
	33	s = NULL;
	34	if (error_msg) {
	35	/* A socket error has occurred. */
	36	connection_fatal(error_msg);
	37	} /* Otherwise, the remote side closed the connection normally. */
	38	return 0;
	39	}
	40
	41	static int rlogin_receive(Plug plug, int urgent, char *data, int len)
	42	{
	43	if (urgent == 2) {
	44	char c;
	45
	46	c = *data++;
	47	len--;
	48	if (c == '\x80')
	49	rlogin_size();
	50	/*
	51	* We should flush everything (aka Telnet SYNCH) if we see
	52	* 0x02, and we should turn off and on _local_ flow control
	53	* on 0x10 and 0x20 respectively. I'm not convinced it's
	54	* worth it...
	55	*/
	56	} else {
	57	/*
	58	* Main rlogin protocol. This is really simple: the first
	59	* byte is expected to be NULL and is ignored, and the rest
	60	* is printed.
	61	*/
	62	static int firstbyte = 1;
	63	if (firstbyte) {
	64	if (data[0] == '\0') {
	65	data++;
	66	len--;
	67	}
	68	firstbyte = 0;
	69	}
	70	c_write(data, len);
	71	}
	72	return 1;
	73	}
	74
	75	/*
	76	* Called to set up the rlogin connection.
	77	*
	78	* Returns an error message, or NULL on success.
	79	*
	80	* Also places the canonical host name into `realhost'.
	81	*/
	82	static char rlogin_init(char host, int port, char **realhost)
	83	{
	84	static struct plug_function_table fn_table = {
	85	rlogin_closing,
	86	rlogin_receive
	87	}, *fn_table_ptr = &fn_table;
	88
	89	SockAddr addr;
	90	char *err;
	91
	92	/*
	93	* Try to find host.
	94	*/
	95	addr = sk_namelookup(host, realhost);
	96	if ((err = sk_addr_error(addr)))
	97	return err;
	98
	99	if (port < 0)
	100	port = 513; /* default rlogin port */
	101
	102	/*
	103	* Open socket.
	104	*/
	105	s = sk_new(addr, port, 1, 0, &fn_table_ptr);
	106	if ((err = sk_socket_error(s)))
	107	return err;
	108
	109	sk_addr_free(addr);
	110
	111	/*
	112	* Send local username, remote username, terminal/speed
	113	*/
	114
	115	{
	116	char z = 0;
	117	char *p;
	118	sk_write(s, &z, 1);
	119	sk_write(s, cfg.localusername, strlen(cfg.localusername));
	120	sk_write(s, &z, 1);
	121	sk_write(s, cfg.username, strlen(cfg.username));
	122	sk_write(s, &z, 1);
	123	sk_write(s, cfg.termtype, strlen(cfg.termtype));
	124	sk_write(s, "/", 1);
	125	for (p = cfg.termspeed; isdigit(*p); p++);
	126	sk_write(s, cfg.termspeed, p - cfg.termspeed);
	127	sk_write(s, &z, 1);
	128	}
	129
	130	return NULL;
	131	}
	132
	133	/*
	134	* Called to send data down the rlogin connection.
	135	*/
	136	static void rlogin_send(char *buf, int len)
	137	{
	138
	139	if (s == NULL)
	140	return;
	141
	142	sk_write(s, buf, len);
	143	}
	144
	145	/*
	146	* Called to set the size of the window
	147	*/
	148	static void rlogin_size(void)
	149	{
	150	char b[12] = { '\xFF', '\xFF', 0x73, 0x73, 0, 0, 0, 0, 0, 0, 0, 0 };
	151
	152	b[6] = cols >> 8;
	153	b[7] = cols & 0xFF;
	154	b[4] = rows >> 8;
	155	b[5] = rows & 0xFF;
	156	sk_write(s, b, 12);
	157	return;
	158	}
	159
	160	/*
	161	* Send rlogin special codes.
	162	*/
	163	static void rlogin_special(Telnet_Special code)
	164	{
	165	/* Do nothing! */
	166	return;
	167	}
	168
	169	static Socket rlogin_socket(void)
	170	{
	171	return s;
	172	}
	173
	174	static int rlogin_sendok(void)
	175	{
	176	return 1;
	177	}
	178
	179	static int rlogin_ldisc(int option)
	180	{
	181	return 0;
	182	}
	183
	184	Backend rlogin_backend = {
	185	rlogin_init,
	186	rlogin_send,
	187	rlogin_size,
	188	rlogin_special,
	189	rlogin_socket,
	190	rlogin_sendok,
	191	rlogin_ldisc,
	192	1
	193	};