-#include <windows.h>
+/*
+ * Rlogin backend.
+ */
+
#include <stdio.h>
#include <stdlib.h>
+#include <limits.h>
#include <ctype.h>
#include "putty.h"
/* the above field _must_ be first in the structure */
Socket s;
+ int closed_on_socket_error;
int bufsize;
+ int firstbyte;
+ int cansize;
int term_width, term_height;
void *frontend;
+
+ Conf *conf;
+
+ /* In case we need to read a username from the terminal before starting */
+ prompts_t *prompt;
} *Rlogin;
static void rlogin_size(void *handle, int width, int height);
sk_set_frozen(rlogin->s, backlog > RLOGIN_MAX_BACKLOG);
}
-static int rlogin_closing(Plug plug, char *error_msg, int error_code,
+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);
+ sfree(msg);
+}
+
+static int rlogin_closing(Plug plug, const char *error_msg, int error_code,
int calling_back)
{
Rlogin rlogin = (Rlogin) plug;
+
+ /*
+ * We don't implement independent EOF in each direction for Telnet
+ * connections; as soon as we get word that the remote side has
+ * sent us EOF, we wind up the whole connection.
+ */
+
if (rlogin->s) {
sk_close(rlogin->s);
rlogin->s = NULL;
+ if (error_msg)
+ rlogin->closed_on_socket_error = TRUE;
+ notify_remote_exit(rlogin->frontend);
}
if (error_msg) {
/* A socket error has occurred. */
logevent(rlogin->frontend, error_msg);
- connection_fatal("%s", error_msg);
+ connection_fatal(rlogin->frontend, "%s", error_msg);
} /* Otherwise, the remote side closed the connection normally. */
return 0;
}
c = *data++;
len--;
- if (c == '\x80')
+ 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
* byte is expected to be NULL and is ignored, and the rest
* is printed.
*/
- static int firstbyte = 1;
- if (firstbyte) {
+ if (rlogin->firstbyte) {
if (data[0] == '\0') {
data++;
len--;
}
- firstbyte = 0;
+ rlogin->firstbyte = 0;
}
if (len > 0)
c_write(rlogin, data, len);
rlogin->bufsize = bufsize;
}
+static void rlogin_startup(Rlogin rlogin, const char *ruser)
+{
+ char z = 0;
+ char *p;
+
+ sk_write(rlogin->s, &z, 1);
+ p = conf_get_str(rlogin->conf, CONF_localusername);
+ sk_write(rlogin->s, p, strlen(p));
+ sk_write(rlogin->s, &z, 1);
+ sk_write(rlogin->s, ruser, strlen(ruser));
+ sk_write(rlogin->s, &z, 1);
+ p = conf_get_str(rlogin->conf, CONF_termtype);
+ sk_write(rlogin->s, p, strlen(p));
+ sk_write(rlogin->s, "/", 1);
+ p = conf_get_str(rlogin->conf, CONF_termspeed);
+ sk_write(rlogin->s, p, strspn(p, "0123456789"));
+ rlogin->bufsize = sk_write(rlogin->s, &z, 1);
+
+ rlogin->prompt = NULL;
+}
+
/*
* Called to set up the rlogin connection.
*
* Also places the canonical host name into `realhost'. It must be
* freed by the caller.
*/
-static char *rlogin_init(void *frontend_handle, void **backend_handle,
- char *host, int port, char **realhost, int nodelay)
+static const char *rlogin_init(void *frontend_handle, void **backend_handle,
+ Conf *conf,
+ 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;
- char *err;
+ const char *err;
Rlogin rlogin;
+ char *ruser;
+ int addressfamily;
+ char *loghost;
- rlogin = smalloc(sizeof(*rlogin));
+ rlogin = snew(struct rlogin_tag);
rlogin->fn = &fn_table;
rlogin->s = NULL;
+ rlogin->closed_on_socket_error = FALSE;
rlogin->frontend = frontend_handle;
- rlogin->term_width = cfg.width;
- rlogin->term_height = cfg.height;
+ rlogin->term_width = conf_get_int(conf, CONF_width);
+ rlogin->term_height = conf_get_int(conf, CONF_height);
+ rlogin->firstbyte = 1;
+ rlogin->cansize = 0;
+ rlogin->prompt = NULL;
+ rlogin->conf = conf_copy(conf);
*backend_handle = rlogin;
+ addressfamily = conf_get_int(conf, CONF_addressfamily);
/*
* Try to find host.
*/
{
- char buf[200];
- sprintf(buf, "Looking up host \"%.170s\"", host);
+ char *buf;
+ buf = dupprintf("Looking up host \"%s\"%s", host,
+ (addressfamily == ADDRTYPE_IPV4 ? " (IPv4)" :
+ (addressfamily == ADDRTYPE_IPV6 ? " (IPv6)" :
+ "")));
logevent(rlogin->frontend, buf);
+ sfree(buf);
}
- addr = sk_namelookup(host, realhost);
- if ((err = sk_addr_error(addr)))
+ addr = name_lookup(host, port, realhost, conf, addressfamily);
+ if ((err = sk_addr_error(addr)) != NULL) {
+ sk_addr_free(addr);
return err;
+ }
if (port < 0)
port = 513; /* default rlogin port */
/*
* Open socket.
*/
- {
- char buf[200], addrbuf[100];
- sk_getaddr(addr, addrbuf, 100);
- sprintf(buf, "Connecting to %.100s port %d", addrbuf, port);
- logevent(rlogin->frontend, buf);
- }
rlogin->s = new_connection(addr, *realhost, port, 1, 0,
- nodelay, (Plug) rlogin);
- if ((err = sk_socket_error(rlogin->s)))
+ nodelay, keepalive, (Plug) rlogin, conf);
+ if ((err = sk_socket_error(rlogin->s)) != NULL)
return err;
- sk_addr_free(addr);
+ loghost = conf_get_str(conf, CONF_loghost);
+ if (*loghost) {
+ char *colon;
+
+ sfree(*realhost);
+ *realhost = dupstr(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';
+ }
+ }
/*
- * Send local username, remote username, terminal/speed
+ * Send local username, remote username, terminal type and
+ * terminal speed - unless we don't have the remote username yet,
+ * in which case we prompt for it and may end up deferring doing
+ * anything else until the local prompt mechanism returns.
*/
-
- {
- char z = 0;
- char *p;
- 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, cfg.username, strlen(cfg.username));
- 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(*p); p++);
- sk_write(rlogin->s, cfg.termspeed, p - cfg.termspeed);
- rlogin->bufsize = sk_write(rlogin->s, &z, 1);
+ if ((ruser = get_remote_username(conf)) != NULL) {
+ rlogin_startup(rlogin, ruser);
+ sfree(ruser);
+ } else {
+ int ret;
+
+ rlogin->prompt = new_prompts(rlogin->frontend);
+ rlogin->prompt->to_server = TRUE;
+ rlogin->prompt->name = dupstr("Rlogin login name");
+ add_prompt(rlogin->prompt, dupstr("rlogin username: "), TRUE);
+ ret = get_userpass_input(rlogin->prompt, NULL, 0);
+ if (ret >= 0) {
+ rlogin_startup(rlogin, rlogin->prompt->prompts[0]->result);
+ }
}
return NULL;
}
+static void rlogin_free(void *handle)
+{
+ Rlogin rlogin = (Rlogin) handle;
+
+ if (rlogin->prompt)
+ free_prompts(rlogin->prompt);
+ if (rlogin->s)
+ sk_close(rlogin->s);
+ conf_free(rlogin->conf);
+ sfree(rlogin);
+}
+
+/*
+ * Stub routine (we don't have any need to reconfigure this backend).
+ */
+static void rlogin_reconfig(void *handle, Conf *conf)
+{
+}
+
/*
* Called to send data down the rlogin connection.
*/
if (rlogin->s == NULL)
return 0;
- rlogin->bufsize = sk_write(rlogin->s, buf, len);
+ if (rlogin->prompt) {
+ /*
+ * We're still prompting for a username, and aren't talking
+ * directly to the network connection yet.
+ */
+ int ret = get_userpass_input(rlogin->prompt,
+ (unsigned char *)buf, len);
+ if (ret >= 0) {
+ rlogin_startup(rlogin, rlogin->prompt->prompts[0]->result);
+ /* that nulls out rlogin->prompt, so then we'll start sending
+ * data down the wire in the obvious way */
+ }
+ } else {
+ rlogin->bufsize = sk_write(rlogin->s, buf, len);
+ }
return rlogin->bufsize;
}
rlogin->term_width = width;
rlogin->term_height = height;
- if (rlogin->s == NULL)
+ if (rlogin->s == NULL || !rlogin->cansize)
return;
b[6] = rlogin->term_width >> 8;
return;
}
-static Socket rlogin_socket(void *handle)
+/*
+ * 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;
+ return rlogin->s != NULL;
}
static int rlogin_sendok(void *handle)
{
- Rlogin rlogin = (Rlogin) handle;
+ /* Rlogin rlogin = (Rlogin) handle; */
return 1;
}
static int rlogin_ldisc(void *handle, int option)
{
- Rlogin rlogin = (Rlogin) handle;
+ /* Rlogin rlogin = (Rlogin) handle; */
return 0;
}
static int rlogin_exitcode(void *handle)
{
Rlogin rlogin = (Rlogin) handle;
- /* If we ever implement RSH, we'll probably need to do this properly */
+ if (rlogin->s != NULL)
+ return -1; /* still connected */
+ else if (rlogin->closed_on_socket_error)
+ return INT_MAX; /* a socket error counts as an unclean exit */
+ 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_socket,
+ rlogin_get_specials,
+ rlogin_connected,
rlogin_exitcode,
rlogin_sendok,
rlogin_ldisc,
rlogin_provide_ldisc,
rlogin_provide_logctx,
rlogin_unthrottle,
- 1
+ rlogin_cfg_info,
+ "rlogin",
+ PROT_RLOGIN,
+ 513
};
projects / u / mdw / putty / blobdiff