Vendor import of OpenSSH.

1 files changed, 359 insertions, 0 deletions

diff --git a/crypto/openssh/ttymodes.c b/crypto/openssh/ttymodes.c
new file mode 100644
index 0000000..309885ef
--- /dev/null
+++ b/crypto/openssh/ttymodes.c
@@ -0,0 +1,359 @@
+/*
+ * Author: Tatu Ylonen <ylo@cs.hut.fi>
+ * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
+ *                    All rights reserved
+ * Created: Tue Mar 21 15:59:15 1995 ylo
+ * 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 "includes.h"
+RCSID("$Id: ttymodes.c,v 1.5 1999/11/24 19:53:54 markus Exp $");
+
+#include "packet.h"
+#include "ssh.h"
+
+#define TTY_OP_END	0
+#define TTY_OP_ISPEED	192	/* int follows */
+#define TTY_OP_OSPEED	193	/* int follows */
+
+/*
+ * 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
+ * in a portable manner, and appends the modes to a packet
+ * being constructed.
+ */
+void 
+tty_make_modes(int fd)
+{
+	struct termios tio;
+	int baud;
+
+	if (tcgetattr(fd, &tio) < 0) {
+		packet_put_char(TTY_OP_END);
+		log("tcgetattr: %.100s", strerror(errno));
+		return;
+	}
+	/* Store input and output baud rates. */
+	baud = speed_to_baud(cfgetospeed(&tio));
+	packet_put_char(TTY_OP_OSPEED);
+	packet_put_int(baud);
+	baud = speed_to_baud(cfgetispeed(&tio));
+	packet_put_char(TTY_OP_ISPEED);
+	packet_put_int(baud);
+
+	/* Store values of mode flags. */
+#define TTYCHAR(NAME, OP) \
+  packet_put_char(OP); packet_put_char(tio.c_cc[NAME]);
+#define TTYMODE(NAME, FIELD, OP) \
+  packet_put_char(OP); packet_put_char((tio.FIELD & NAME) != 0);
+#define SGTTYCHAR(NAME, OP)
+#define SGTTYMODE(NAME, FIELD, OP)
+#define SGTTYMODEN(NAME, FIELD, OP)
+
+#include "ttymodes.h"
+
+#undef TTYCHAR
+#undef TTYMODE
+#undef SGTTYCHAR
+#undef SGTTYMODE
+#undef SGTTYMODEN
+
+	/* Mark end of mode data. */
+	packet_put_char(TTY_OP_END);
+}
+
+/*
+ * 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;
+
+	/*
+	 * 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) < 0)
+		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)) < 0)
+				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)) < 0)
+				error("cfsetospeed failed for %d", baud);
+			break;
+
+#define TTYCHAR(NAME, OP) 				\
+	case OP:					\
+	  n_bytes += 1;					\
+	  tio.c_cc[NAME] = packet_get_char();		\
+	  break;
+#define TTYMODE(NAME, FIELD, OP)		       	\
+	case OP:					\
+	  n_bytes += 1;					\
+	  if (packet_get_char())			\
+	    tio.FIELD |= NAME;				\
+	  else						\
+	    tio.FIELD &= ~NAME;				\
+	  break;
+#define SGTTYCHAR(NAME, OP)
+#define SGTTYMODE(NAME, FIELD, OP)
+#define SGTTYMODEN(NAME, FIELD, OP)
+
+#include "ttymodes.h"
+
+#undef TTYCHAR
+#undef TTYMODE
+#undef SGTTYCHAR
+#undef SGTTYMODE
+#undef SGTTYMODEN
+
+		default:
+			debug("Ignoring unsupported tty mode opcode %d (0x%x)",
+			      opcode, opcode);
+			/*
+			 * Opcodes 0 to 127 are defined to have
+			 * a one-byte argument.
+			 */
+			if (opcode >= 0 && opcode < 128) {
+				n_bytes += 1;
+				(void) packet_get_char();
+				break;
+			} else {
+				/*
+				 * Opcodes 128 to 159 are defined to have
+				 * an integer argument.
+				 */
+				if (opcode >= 128 && opcode < 160) {
+					n_bytes += 4;
+					(void) packet_get_int();
+					break;
+				}
+			}
+			/*
+			 * It is a truly undefined opcode (160 to 255).
+			 * We have no idea about its arguments.  So we
+			 * must stop parsing.  Note that some data may be
+			 * left in the packet; hopefully there is nothing
+			 * more coming after the mode data.
+			 */
+			log("parse_tty_modes: unknown opcode %d", opcode);
+			packet_integrity_check(0, 1, SSH_CMSG_REQUEST_PTY);
+			goto set;
+		}
+	}
+
+set:
+	if (*n_bytes_ptr != n_bytes) {
+		*n_bytes_ptr = n_bytes;
+		return;		/* Don't process bytes passed */
+	}
+	if (failure == -1)
+		return;		/* Packet parsed ok but tty stuff failed */
+
+	/* Set the new modes for the terminal. */
+	if (tcsetattr(fd, TCSANOW, &tio) < 0)
+		log("Setting tty modes failed: %.100s", strerror(errno));
+	return;
+}