Reintegrate tools from trunk

1 files changed, 373 insertions, 0 deletions

diff --git a/tools/plink/rlogin.c b/tools/plink/rlogin.c
new file mode 100644
index 000000000..b514d7a5b
--- /dev/null
+++ b/tools/plink/rlogin.c
@@ -0,0 +1,373 @@
+/*

+ * Rlogin backend.

+ */

+

+#include <stdio.h>

+#include <stdlib.h>

+#include <ctype.h>

+

+#include "putty.h"

+

+#ifndef FALSE

+#define FALSE 0

+#endif

+#ifndef TRUE

+#define TRUE 1

+#endif

+

+#define RLOGIN_MAX_BACKLOG 4096

+

+typedef struct rlogin_tag {

+    const struct plug_function_table *fn;

+    /* the above field _must_ be first in the structure */

+

+    Socket s;

+    int bufsize;

+    int firstbyte;

+    int cansize;

+    int term_width, term_height;

+    void *frontend;

+} *Rlogin;

+

+static void rlogin_size(void *handle, int width, int height);

+

+static void c_write(Rlogin rlogin, char *buf, int len)

+{

+    int backlog = from_backend(rlogin->frontend, 0, buf, len);

+    sk_set_frozen(rlogin->s, backlog > RLOGIN_MAX_BACKLOG);

+}

+

+static void rlogin_log(Plug plug, int type, SockAddr addr, int port,

+		       const char *error_msg, int error_code)

+{

+    Rlogin rlogin = (Rlogin) plug;

+    char addrbuf[256], *msg;

+

+    sk_getaddr(addr, addrbuf, lenof(addrbuf));

+

+    if (type == 0)

+	msg = dupprintf("Connecting to %s port %d", addrbuf, port);

+    else

+	msg = dupprintf("Failed to connect to %s: %s", addrbuf, error_msg);

+

+    logevent(rlogin->frontend, msg);

+}

+

+static int rlogin_closing(Plug plug, const char *error_msg, int error_code,

+			  int calling_back)

+{

+    Rlogin rlogin = (Rlogin) plug;

+    if (rlogin->s) {

+        sk_close(rlogin->s);

+        rlogin->s = NULL;

+	notify_remote_exit(rlogin->frontend);

+    }

+    if (error_msg) {

+	/* A socket error has occurred. */

+	logevent(rlogin->frontend, error_msg);

+	connection_fatal(rlogin->frontend, "%s", error_msg);

+    }				       /* Otherwise, the remote side closed the connection normally. */

+    return 0;

+}

+

+static int rlogin_receive(Plug plug, int urgent, char *data, int len)

+{

+    Rlogin rlogin = (Rlogin) plug;

+    if (urgent == 2) {

+	char c;

+

+	c = *data++;

+	len--;

+	if (c == '\x80') {

+	    rlogin->cansize = 1;

+	    rlogin_size(rlogin, rlogin->term_width, rlogin->term_height);

+        }

+	/*

+	 * We should flush everything (aka Telnet SYNCH) if we see

+	 * 0x02, and we should turn off and on _local_ flow control

+	 * on 0x10 and 0x20 respectively. I'm not convinced it's

+	 * worth it...

+	 */

+    } else {

+	/*

+	 * Main rlogin protocol. This is really simple: the first

+	 * byte is expected to be NULL and is ignored, and the rest

+	 * is printed.

+	 */

+	if (rlogin->firstbyte) {

+	    if (data[0] == '\0') {

+		data++;

+		len--;

+	    }

+	    rlogin->firstbyte = 0;

+	}

+	if (len > 0)

+            c_write(rlogin, data, len);

+    }

+    return 1;

+}

+

+static void rlogin_sent(Plug plug, int bufsize)

+{

+    Rlogin rlogin = (Rlogin) plug;

+    rlogin->bufsize = bufsize;

+}

+

+/*

+ * Called to set up the rlogin connection.

+ * 

+ * Returns an error message, or NULL on success.

+ *

+ * Also places the canonical host name into `realhost'. It must be

+ * freed by the caller.

+ */

+static const char *rlogin_init(void *frontend_handle, void **backend_handle,

+			       Config *cfg,

+			       char *host, int port, char **realhost,

+			       int nodelay, int keepalive)

+{

+    static const struct plug_function_table fn_table = {

+	rlogin_log,

+	rlogin_closing,

+	rlogin_receive,

+	rlogin_sent

+    };

+    SockAddr addr;

+    const char *err;

+    Rlogin rlogin;

+

+    rlogin = snew(struct rlogin_tag);

+    rlogin->fn = &fn_table;

+    rlogin->s = NULL;

+    rlogin->frontend = frontend_handle;

+    rlogin->term_width = cfg->width;

+    rlogin->term_height = cfg->height;

+    rlogin->firstbyte = 1;

+    rlogin->cansize = 0;

+    *backend_handle = rlogin;

+

+    /*

+     * Try to find host.

+     */

+    {

+	char *buf;

+	buf = dupprintf("Looking up host \"%s\"%s", host,

+			(cfg->addressfamily == ADDRTYPE_IPV4 ? " (IPv4)" :

+			 (cfg->addressfamily == ADDRTYPE_IPV6 ? " (IPv6)" :

+			  "")));

+	logevent(rlogin->frontend, buf);

+	sfree(buf);

+    }

+    addr = name_lookup(host, port, realhost, cfg, cfg->addressfamily);

+    if ((err = sk_addr_error(addr)) != NULL) {

+	sk_addr_free(addr);

+	return err;

+    }

+

+    if (port < 0)

+	port = 513;		       /* default rlogin port */

+

+    /*

+     * Open socket.

+     */

+    rlogin->s = new_connection(addr, *realhost, port, 1, 0,

+			       nodelay, keepalive, (Plug) rlogin, cfg);

+    if ((err = sk_socket_error(rlogin->s)) != NULL)

+	return err;

+

+    /*

+     * Send local username, remote username, terminal/speed

+     */

+

+    {

+	char z = 0;

+	char *p;

+	char ruser[sizeof(cfg->username)];

+	(void) get_remote_username(cfg, ruser, sizeof(ruser));

+	sk_write(rlogin->s, &z, 1);

+	sk_write(rlogin->s, cfg->localusername,

+		 strlen(cfg->localusername));

+	sk_write(rlogin->s, &z, 1);

+	sk_write(rlogin->s, ruser,

+		 strlen(ruser));

+	sk_write(rlogin->s, &z, 1);

+	sk_write(rlogin->s, cfg->termtype,

+		 strlen(cfg->termtype));

+	sk_write(rlogin->s, "/", 1);

+	for (p = cfg->termspeed; isdigit((unsigned char)*p); p++) continue;

+	sk_write(rlogin->s, cfg->termspeed, p - cfg->termspeed);

+	rlogin->bufsize = sk_write(rlogin->s, &z, 1);

+    }

+

+    if (*cfg->loghost) {

+	char *colon;

+

+	sfree(*realhost);

+	*realhost = dupstr(cfg->loghost);

+	colon = strrchr(*realhost, ':');

+	if (colon) {

+	    /*

+	     * FIXME: if we ever update this aspect of ssh.c for

+	     * IPv6 literal management, this should change in line

+	     * with it.

+	     */

+	    *colon++ = '\0';

+	}

+    }

+

+    return NULL;

+}

+

+static void rlogin_free(void *handle)

+{

+    Rlogin rlogin = (Rlogin) handle;

+

+    if (rlogin->s)

+	sk_close(rlogin->s);

+    sfree(rlogin);

+}

+

+/*

+ * Stub routine (we don't have any need to reconfigure this backend).

+ */

+static void rlogin_reconfig(void *handle, Config *cfg)

+{

+}

+

+/*

+ * Called to send data down the rlogin connection.

+ */

+static int rlogin_send(void *handle, char *buf, int len)

+{

+    Rlogin rlogin = (Rlogin) handle;

+

+    if (rlogin->s == NULL)

+	return 0;

+

+    rlogin->bufsize = sk_write(rlogin->s, buf, len);

+

+    return rlogin->bufsize;

+}

+

+/*

+ * Called to query the current socket sendability status.

+ */

+static int rlogin_sendbuffer(void *handle)

+{

+    Rlogin rlogin = (Rlogin) handle;

+    return rlogin->bufsize;

+}

+

+/*

+ * Called to set the size of the window

+ */

+static void rlogin_size(void *handle, int width, int height)

+{

+    Rlogin rlogin = (Rlogin) handle;

+    char b[12] = { '\xFF', '\xFF', 0x73, 0x73, 0, 0, 0, 0, 0, 0, 0, 0 };

+

+    rlogin->term_width = width;

+    rlogin->term_height = height;

+

+    if (rlogin->s == NULL || !rlogin->cansize)

+	return;

+

+    b[6] = rlogin->term_width >> 8;

+    b[7] = rlogin->term_width & 0xFF;

+    b[4] = rlogin->term_height >> 8;

+    b[5] = rlogin->term_height & 0xFF;

+    rlogin->bufsize = sk_write(rlogin->s, b, 12);

+    return;

+}

+

+/*

+ * Send rlogin special codes.

+ */

+static void rlogin_special(void *handle, Telnet_Special code)

+{

+    /* Do nothing! */

+    return;

+}

+

+/*

+ * Return a list of the special codes that make sense in this

+ * protocol.

+ */

+static const struct telnet_special *rlogin_get_specials(void *handle)

+{

+    return NULL;

+}

+

+static int rlogin_connected(void *handle)

+{

+    Rlogin rlogin = (Rlogin) handle;

+    return rlogin->s != NULL;

+}

+

+static int rlogin_sendok(void *handle)

+{

+    /* Rlogin rlogin = (Rlogin) handle; */

+    return 1;

+}

+

+static void rlogin_unthrottle(void *handle, int backlog)

+{

+    Rlogin rlogin = (Rlogin) handle;

+    sk_set_frozen(rlogin->s, backlog > RLOGIN_MAX_BACKLOG);

+}

+

+static int rlogin_ldisc(void *handle, int option)

+{

+    /* Rlogin rlogin = (Rlogin) handle; */

+    return 0;

+}

+

+static void rlogin_provide_ldisc(void *handle, void *ldisc)

+{

+    /* This is a stub. */

+}

+

+static void rlogin_provide_logctx(void *handle, void *logctx)

+{

+    /* This is a stub. */

+}

+

+static int rlogin_exitcode(void *handle)

+{

+    Rlogin rlogin = (Rlogin) handle;

+    if (rlogin->s != NULL)

+        return -1;                     /* still connected */

+    else

+        /* If we ever implement RSH, we'll probably need to do this properly */

+        return 0;

+}

+

+/*

+ * cfg_info for rlogin does nothing at all.

+ */

+static int rlogin_cfg_info(void *handle)

+{

+    return 0;

+}

+

+Backend rlogin_backend = {

+    rlogin_init,

+    rlogin_free,

+    rlogin_reconfig,

+    rlogin_send,

+    rlogin_sendbuffer,

+    rlogin_size,

+    rlogin_special,

+    rlogin_get_specials,

+    rlogin_connected,

+    rlogin_exitcode,

+    rlogin_sendok,

+    rlogin_ldisc,

+    rlogin_provide_ldisc,

+    rlogin_provide_logctx,

+    rlogin_unthrottle,

+    rlogin_cfg_info,

+    "rlogin",

+    PROT_RLOGIN,

+    513

+};