Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.bin/ssh/lib/../ttymodes.c	Lines:	0	141	0.0 %
Date:	2017-11-13	Branches:	0	129	0.0 %


/* $OpenBSD: ttymodes.c,v 1.32 2017/04/30 23:26:54 djm Exp $ */
/*
 * Author: Tatu Ylonen <ylo@cs.hut.fi>
 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
 *                    All rights reserved
 *
 * As far as I am concerned, the code I have written for this software
 * can be used freely for any purpose.  Any derived versions of this
 * software must be clearly marked as such, and if the derived work is
 * incompatible with the protocol description in the RFC file, it must be
 * called by a name other than "ssh" or "Secure Shell".
 */

/*
 * SSH2 tty modes support by Kevin Steves.
 * Copyright (c) 2001 Kevin Steves.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * Encoding and decoding of terminal modes in a portable way.
 * Much of the format is defined in ttymodes.h; it is included multiple times
 * into this file with the appropriate macro definitions to generate the
 * suitable code.
 */

#include <sys/types.h>

#include <errno.h>
#include <string.h>
#include <termios.h>
#include <stdarg.h>

#include "packet.h"
#include "log.h"
#include "compat.h"
#include "buffer.h"

#define TTY_OP_END		0
/*
 * uint32 (u_int) follows speed.
 */
#define TTY_OP_ISPEED	128
#define TTY_OP_OSPEED	129

/*
 * Converts POSIX speed_t to a baud rate.  The values of the
 * constants for speed_t are not themselves portable.
 */
static int
speed_to_baud(speed_t speed)
{
	switch (speed) {
	case B0:
		return 0;
	case B50:
		return 50;
	case B75:
		return 75;
	case B110:
		return 110;
	case B134:
		return 134;
	case B150:
		return 150;
	case B200:
		return 200;
	case B300:
		return 300;
	case B600:
		return 600;
	case B1200:
		return 1200;
	case B1800:
		return 1800;
	case B2400:
		return 2400;
	case B4800:
		return 4800;
	case B9600:
		return 9600;

#ifdef B19200
	case B19200:
		return 19200;
#else /* B19200 */
#ifdef EXTA
	case EXTA:
		return 19200;
#endif /* EXTA */
#endif /* B19200 */

#ifdef B38400
	case B38400:
		return 38400;
#else /* B38400 */
#ifdef EXTB
	case EXTB:
		return 38400;
#endif /* EXTB */
#endif /* B38400 */

#ifdef B7200
	case B7200:
		return 7200;
#endif /* B7200 */
#ifdef B14400
	case B14400:
		return 14400;
#endif /* B14400 */
#ifdef B28800
	case B28800:
		return 28800;
#endif /* B28800 */
#ifdef B57600
	case B57600:
		return 57600;
#endif /* B57600 */
#ifdef B76800
	case B76800:
		return 76800;
#endif /* B76800 */
#ifdef B115200
	case B115200:
		return 115200;
#endif /* B115200 */
#ifdef B230400
	case B230400:
		return 230400;
#endif /* B230400 */
	default:
		return 9600;
	}
}

/*
 * Converts a numeric baud rate to a POSIX speed_t.
 */
static speed_t
baud_to_speed(int baud)
{
	switch (baud) {
	case 0:
		return B0;
	case 50:
		return B50;
	case 75:
		return B75;
	case 110:
		return B110;
	case 134:
		return B134;
	case 150:
		return B150;
	case 200:
		return B200;
	case 300:
		return B300;
	case 600:
		return B600;
	case 1200:
		return B1200;
	case 1800:
		return B1800;
	case 2400:
		return B2400;
	case 4800:
		return B4800;
	case 9600:
		return B9600;

#ifdef B19200
	case 19200:
		return B19200;
#else /* B19200 */
#ifdef EXTA
	case 19200:
		return EXTA;
#endif /* EXTA */
#endif /* B19200 */

#ifdef B38400
	case 38400:
		return B38400;
#else /* B38400 */
#ifdef EXTB
	case 38400:
		return EXTB;
#endif /* EXTB */
#endif /* B38400 */

#ifdef B7200
	case 7200:
		return B7200;
#endif /* B7200 */
#ifdef B14400
	case 14400:
		return B14400;
#endif /* B14400 */
#ifdef B28800
	case 28800:
		return B28800;
#endif /* B28800 */
#ifdef B57600
	case 57600:
		return B57600;
#endif /* B57600 */
#ifdef B76800
	case 76800:
		return B76800;
#endif /* B76800 */
#ifdef B115200
	case 115200:
		return B115200;
#endif /* B115200 */
#ifdef B230400
	case 230400:
		return B230400;
#endif /* B230400 */
	default:
		return B9600;
	}
}

/*
 * Encodes terminal modes for the terminal referenced by fd
 * or tiop in a portable manner, and appends the modes to a packet
 * being constructed.
 */
void
tty_make_modes(int fd, struct termios *tiop)
{
	struct termios tio;
	int baud;
	Buffer buf;

	buffer_init(&buf);

	if (tiop == NULL) {
		if (fd == -1) {
			debug("tty_make_modes: no fd or tio");
			goto end;
		}
		if (tcgetattr(fd, &tio) == -1) {
			logit("tcgetattr: %.100s", strerror(errno));
			goto end;
		}
	} else
		tio = *tiop;

	/* Store input and output baud rates. */
	baud = speed_to_baud(cfgetospeed(&tio));
	buffer_put_char(&buf, TTY_OP_OSPEED);
	buffer_put_int(&buf, baud);
	baud = speed_to_baud(cfgetispeed(&tio));
	buffer_put_char(&buf, TTY_OP_ISPEED);
	buffer_put_int(&buf, baud);

	/* Store values of mode flags. */
#define TTYCHAR(NAME, OP) \
	buffer_put_char(&buf, OP); \
	buffer_put_int(&buf, tio.c_cc[NAME]);

#define TTYMODE(NAME, FIELD, OP) \
	buffer_put_char(&buf, OP); \
	buffer_put_int(&buf, ((tio.FIELD & NAME) != 0));

#include "ttymodes.h"

#undef TTYCHAR
#undef TTYMODE

end:
	/* Mark end of mode data. */
	buffer_put_char(&buf, TTY_OP_END);
	packet_put_string(buffer_ptr(&buf), buffer_len(&buf));
	buffer_free(&buf);
}

/*
 * Decodes terminal modes for the terminal referenced by fd in a portable
 * manner from a packet being read.
 */
void
tty_parse_modes(int fd, int *n_bytes_ptr)
{
	struct termios tio;
	int opcode, baud;
	int n_bytes = 0;
	int failure = 0;

	*n_bytes_ptr = packet_get_int();
	if (*n_bytes_ptr == 0)
		return;

	/*
	 * Get old attributes for the terminal.  We will modify these
	 * flags. I am hoping that if there are any machine-specific
	 * modes, they will initially have reasonable values.
	 */
	if (tcgetattr(fd, &tio) == -1) {
		logit("tcgetattr: %.100s", strerror(errno));
		failure = -1;
	}

	for (;;) {
		n_bytes += 1;
		opcode = packet_get_char();
		switch (opcode) {
		case TTY_OP_END:
			goto set;

		case TTY_OP_ISPEED:
			n_bytes += 4;
			baud = packet_get_int();
			if (failure != -1 &&
			    cfsetispeed(&tio, baud_to_speed(baud)) == -1)
				error("cfsetispeed failed for %d", baud);
			break;

		case TTY_OP_OSPEED:
			n_bytes += 4;
			baud = packet_get_int();
			if (failure != -1 &&
			    cfsetospeed(&tio, baud_to_speed(baud)) == -1)
				error("cfsetospeed failed for %d", baud);
			break;

#define TTYCHAR(NAME, OP) \
	case OP: \
	  n_bytes += 4; \
	  tio.c_cc[NAME] = packet_get_int(); \
	  break;
#define TTYMODE(NAME, FIELD, OP) \
	case OP: \
	  n_bytes += 4; \
	  if (packet_get_int()) \
	    tio.FIELD |= NAME; \
	  else \
	    tio.FIELD &= ~NAME;	\
	  break;

#include "ttymodes.h"

#undef TTYCHAR
#undef TTYMODE

		default:
			debug("Ignoring unsupported tty mode opcode %d (0x%x)",
			    opcode, opcode);
			/*
			 * SSH2:
			 * Opcodes 1 to 159 are defined to have a uint32
			 * argument.
			 * Opcodes 160 to 255 are undefined and cause parsing
			 * to stop.
			 */
			if (opcode > 0 && opcode < 160) {
				n_bytes += 4;
				(void) packet_get_int();
				break;
			} else {
				logit("parse_tty_modes: unknown opcode %d",
				    opcode);
				goto set;
			}
		}
	}

set:
	if (*n_bytes_ptr != n_bytes) {
		*n_bytes_ptr = n_bytes;
		logit("parse_tty_modes: n_bytes_ptr != n_bytes: %d %d",
		    *n_bytes_ptr, n_bytes);
		return;		/* Don't process bytes passed */
	}
	if (failure == -1)
		return;		/* Packet parsed ok but tcgetattr() failed */

	/* Set the new modes for the terminal. */
	if (tcsetattr(fd, TCSANOW, &tio) == -1)
		logit("Setting tty modes failed: %.100s", strerror(errno));
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: ttymodes.c,v 1.32 2017/04/30 23:26:54 djm Exp $ */
2			/*
3			* Author: Tatu Ylonen <ylo@cs.hut.fi>
4			* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
5			* All rights reserved
6			*
7			* As far as I am concerned, the code I have written for this software
8			* can be used freely for any purpose. Any derived versions of this
9			* software must be clearly marked as such, and if the derived work is
10			* incompatible with the protocol description in the RFC file, it must be
11			* called by a name other than "ssh" or "Secure Shell".
12			*/
13
14			/*
15			* SSH2 tty modes support by Kevin Steves.
16			* Copyright (c) 2001 Kevin Steves. All rights reserved.
17			*
18			* Redistribution and use in source and binary forms, with or without
19			* modification, are permitted provided that the following conditions
20			* are met:
21			* 1. Redistributions of source code must retain the above copyright
22			* notice, this list of conditions and the following disclaimer.
23			* 2. Redistributions in binary form must reproduce the above copyright
24			* notice, this list of conditions and the following disclaimer in the
25			* documentation and/or other materials provided with the distribution.
26			*
27			* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
28			* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
29			* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
30			* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
31			* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
32			* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
33			* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
34			* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
35			* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
36			* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37			*/
38
39			/*
40			* Encoding and decoding of terminal modes in a portable way.
41			* Much of the format is defined in ttymodes.h; it is included multiple times
42			* into this file with the appropriate macro definitions to generate the
43			* suitable code.
44			*/
45
46			#include <sys/types.h>
47
48			#include <errno.h>
49			#include <string.h>
50			#include <termios.h>
51			#include <stdarg.h>
52
53			#include "packet.h"
54			#include "log.h"
55			#include "compat.h"
56			#include "buffer.h"
57
58			#define TTY_OP_END 0
59			/*
60			* uint32 (u_int) follows speed.
61			*/
62			#define TTY_OP_ISPEED 128
63			#define TTY_OP_OSPEED 129
64
65			/*
66			* Converts POSIX speed_t to a baud rate. The values of the
67			* constants for speed_t are not themselves portable.
68			*/
69			static int
70			speed_to_baud(speed_t speed)
71			{
72			switch (speed) {
73			case B0:
74			return 0;
75			case B50:
76			return 50;
77			case B75:
78			return 75;
79			case B110:
80			return 110;
81			case B134:
82			return 134;
83			case B150:
84			return 150;
85			case B200:
86			return 200;
87			case B300:
88			return 300;
89			case B600:
90			return 600;
91			case B1200:
92			return 1200;
93			case B1800:
94			return 1800;
95			case B2400:
96			return 2400;
97			case B4800:
98			return 4800;
99			case B9600:
100			return 9600;
101
102			#ifdef B19200
103			case B19200:
104			return 19200;
105			#else /* B19200 */
106			#ifdef EXTA
107			case EXTA:
108			return 19200;
109			#endif /* EXTA */
110			#endif /* B19200 */
111
112			#ifdef B38400
113			case B38400:
114			return 38400;
115			#else /* B38400 */
116			#ifdef EXTB
117			case EXTB:
118			return 38400;
119			#endif /* EXTB */
120			#endif /* B38400 */
121
122			#ifdef B7200
123			case B7200:
124			return 7200;
125			#endif /* B7200 */
126			#ifdef B14400
127			case B14400:
128			return 14400;
129			#endif /* B14400 */
130			#ifdef B28800
131			case B28800:
132			return 28800;
133			#endif /* B28800 */
134			#ifdef B57600
135			case B57600:
136			return 57600;
137			#endif /* B57600 */
138			#ifdef B76800
139			case B76800:
140			return 76800;
141			#endif /* B76800 */
142			#ifdef B115200
143			case B115200:
144			return 115200;
145			#endif /* B115200 */
146			#ifdef B230400
147			case B230400:
148			return 230400;
149			#endif /* B230400 */
150			default:
151			return 9600;
152			}
153			}
154
155			/*
156			* Converts a numeric baud rate to a POSIX speed_t.
157			*/
158			static speed_t
159			baud_to_speed(int baud)
160			{
161			switch (baud) {
162			case 0:
163			return B0;
164			case 50:
165			return B50;
166			case 75:
167			return B75;
168			case 110:
169			return B110;
170			case 134:
171			return B134;
172			case 150:
173			return B150;
174			case 200:
175			return B200;
176			case 300:
177			return B300;
178			case 600:
179			return B600;
180			case 1200:
181			return B1200;
182			case 1800:
183			return B1800;
184			case 2400:
185			return B2400;
186			case 4800:
187			return B4800;
188			case 9600:
189			return B9600;
190
191			#ifdef B19200
192			case 19200:
193			return B19200;
194			#else /* B19200 */
195			#ifdef EXTA
196			case 19200:
197			return EXTA;
198			#endif /* EXTA */
199			#endif /* B19200 */
200
201			#ifdef B38400
202			case 38400:
203			return B38400;
204			#else /* B38400 */
205			#ifdef EXTB
206			case 38400:
207			return EXTB;
208			#endif /* EXTB */
209			#endif /* B38400 */
210
211			#ifdef B7200
212			case 7200:
213			return B7200;
214			#endif /* B7200 */
215			#ifdef B14400
216			case 14400:
217			return B14400;
218			#endif /* B14400 */
219			#ifdef B28800
220			case 28800:
221			return B28800;
222			#endif /* B28800 */
223			#ifdef B57600
224			case 57600:
225			return B57600;
226			#endif /* B57600 */
227			#ifdef B76800
228			case 76800:
229			return B76800;
230			#endif /* B76800 */
231			#ifdef B115200
232			case 115200:
233			return B115200;
234			#endif /* B115200 */
235			#ifdef B230400
236			case 230400:
237			return B230400;
238			#endif /* B230400 */
239			default:
240			return B9600;
241			}
242			}
243
244			/*
245			* Encodes terminal modes for the terminal referenced by fd
246			* or tiop in a portable manner, and appends the modes to a packet
247			* being constructed.
248			*/
249			void
250			tty_make_modes(int fd, struct termios *tiop)
251			{
252			struct termios tio;
253			int baud;
254			Buffer buf;
255
256			buffer_init(&buf);
257
258			if (tiop == NULL) {
259			if (fd == -1) {
260			debug("tty_make_modes: no fd or tio");
261			goto end;
262			}
263			if (tcgetattr(fd, &tio) == -1) {
264			logit("tcgetattr: %.100s", strerror(errno));
265			goto end;
266			}
267			} else
268			tio = *tiop;
269
270			/* Store input and output baud rates. */
271			baud = speed_to_baud(cfgetospeed(&tio));
272			buffer_put_char(&buf, TTY_OP_OSPEED);
273			buffer_put_int(&buf, baud);
274			baud = speed_to_baud(cfgetispeed(&tio));
275			buffer_put_char(&buf, TTY_OP_ISPEED);
276			buffer_put_int(&buf, baud);
277
278			/* Store values of mode flags. */
279			#define TTYCHAR(NAME, OP) \
280			buffer_put_char(&buf, OP); \
281			buffer_put_int(&buf, tio.c_cc[NAME]);
282
283			#define TTYMODE(NAME, FIELD, OP) \
284			buffer_put_char(&buf, OP); \
285			buffer_put_int(&buf, ((tio.FIELD & NAME) != 0));
286
287			#include "ttymodes.h"
288
289			#undef TTYCHAR
290			#undef TTYMODE
291
292			end:
293			/* Mark end of mode data. */
294			buffer_put_char(&buf, TTY_OP_END);
295			packet_put_string(buffer_ptr(&buf), buffer_len(&buf));
296			buffer_free(&buf);
297			}
298
299			/*
300			* Decodes terminal modes for the terminal referenced by fd in a portable
301			* manner from a packet being read.
302			*/
303			void
304			tty_parse_modes(int fd, int *n_bytes_ptr)
305			{
306			struct termios tio;
307			int opcode, baud;
308			int n_bytes = 0;
309			int failure = 0;
310
311			*n_bytes_ptr = packet_get_int();
312			if (*n_bytes_ptr == 0)
313			return;
314
315			/*
316			* Get old attributes for the terminal. We will modify these
317			* flags. I am hoping that if there are any machine-specific
318			* modes, they will initially have reasonable values.
319			*/
320			if (tcgetattr(fd, &tio) == -1) {
321			logit("tcgetattr: %.100s", strerror(errno));
322			failure = -1;
323			}
324
325			for (;;) {
326			n_bytes += 1;
327			opcode = packet_get_char();
328			switch (opcode) {
329			case TTY_OP_END:
330			goto set;
331
332			case TTY_OP_ISPEED:
333			n_bytes += 4;
334			baud = packet_get_int();
335			if (failure != -1 &&
336			cfsetispeed(&tio, baud_to_speed(baud)) == -1)
337			error("cfsetispeed failed for %d", baud);
338			break;
339
340			case TTY_OP_OSPEED:
341			n_bytes += 4;
342			baud = packet_get_int();
343			if (failure != -1 &&
344			cfsetospeed(&tio, baud_to_speed(baud)) == -1)
345			error("cfsetospeed failed for %d", baud);
346			break;
347
348			#define TTYCHAR(NAME, OP) \
349			case OP: \
350			n_bytes += 4; \
351			tio.c_cc[NAME] = packet_get_int(); \
352			break;
353			#define TTYMODE(NAME, FIELD, OP) \
354			case OP: \
355			n_bytes += 4; \
356			if (packet_get_int()) \
357			tio.FIELD \|= NAME; \
358			else \
359			tio.FIELD &= ~NAME; \
360			break;
361
362			#include "ttymodes.h"
363
364			#undef TTYCHAR
365			#undef TTYMODE
366
367			default:
368			debug("Ignoring unsupported tty mode opcode %d (0x%x)",
369			opcode, opcode);
370			/*
371			* SSH2:
372			* Opcodes 1 to 159 are defined to have a uint32
373			* argument.
374			* Opcodes 160 to 255 are undefined and cause parsing
375			* to stop.
376			*/
377			if (opcode > 0 && opcode < 160) {
378			n_bytes += 4;
379			(void) packet_get_int();
380			break;
381			} else {
382			logit("parse_tty_modes: unknown opcode %d",
383			opcode);
384			goto set;
385			}
386			}
387			}
388
389			set:
390			if (*n_bytes_ptr != n_bytes) {
391			*n_bytes_ptr = n_bytes;
392			logit("parse_tty_modes: n_bytes_ptr != n_bytes: %d %d",
393			*n_bytes_ptr, n_bytes);
394			return; /* Don't process bytes passed */
395			}
396			if (failure == -1)
397			return; /* Packet parsed ok but tcgetattr() failed */
398
399			/* Set the new modes for the terminal. */
400			if (tcsetattr(fd, TCSANOW, &tio) == -1)
401			logit("Setting tty modes failed: %.100s", strerror(errno));
402			}