-#include <windows.h>
+/*
+ * Rlogin backend.
+ */
+
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#define TRUE 1
#endif
-static Socket s = NULL;
+#define RLOGIN_MAX_BACKLOG 4096
+
+typedef struct rlogin_tag {
+ const struct plug_function_table *fn;
+ /* the above field _must_ be first in the structure */
-static void rlogin_size(void);
+ Socket s;
+ int bufsize;
+ int firstbyte;
+ int cansize;
+ int term_width, term_height;
+ void *frontend;
+} *Rlogin;
-static int sb_opt, sb_len;
-static char *sb_buf = NULL;
-static int sb_size = 0;
-#define SB_DELTA 1024
+static void rlogin_size(void *handle, int width, int height);
-static void c_write (char *buf, int len) {
- from_backend(0, buf, len);
+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 int rlogin_receive (Socket skt, int urgent, char *data, int len) {
- if (urgent==3) {
- /* A socket error has occurred. */
- sk_close(s);
- s = NULL;
- connection_fatal(data);
- return 0;
- } else if (!len) {
- /* Connection has closed. */
- sk_close(s);
- s = NULL;
- return 0;
+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_size();
- /*
- * 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.
- */
- static int firstbyte = 1;
- if (firstbyte) {
- if (data[0] == '\0') {
- data++;
- len--;
- }
- firstbyte = 0;
+ char c;
+
+ c = *data++;
+ len--;
+ if (c == '\x80') {
+ rlogin->cansize = 1;
+ rlogin_size(rlogin, rlogin->term_width, rlogin->term_height);
}
- c_write(data, len);
+ /*
+ * 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'.
+ * Also places the canonical host name into `realhost'. It must be
+ * freed by the caller.
*/
-static char *rlogin_init (char *host, int port, char **realhost) {
+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;
- char *err;
+ 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.
*/
- addr = sk_namelookup(host, realhost);
- if ( (err = sk_addr_error(addr)) )
+ {
+ 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.
*/
- s = sk_new(addr, port, 1, 0, rlogin_receive);
- if ( (err = sk_socket_error(s)) )
+ rlogin->s = new_connection(addr, *realhost, port, 1, 0,
+ nodelay, keepalive, (Plug) rlogin, cfg);
+ if ((err = sk_socket_error(rlogin->s)) != NULL)
return err;
- sk_addr_free(addr);
-
/*
* Send local username, remote username, terminal/speed
*/
{
- char z = 0;
- char *p;
- sk_write(s, &z, 1);
- sk_write(s, cfg.localusername, strlen(cfg.localusername));
- sk_write(s, &z, 1);
- sk_write(s, cfg.username, strlen(cfg.username));
- sk_write(s, &z, 1);
- sk_write(s, cfg.termtype, strlen(cfg.termtype));
- sk_write(s, "/", 1);
- for(p = cfg.termspeed; isdigit(*p); p++);
- sk_write(s, cfg.termspeed, p - cfg.termspeed);
- sk_write(s, &z, 1);
+ 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((unsigned char)*p); p++) continue;
+ sk_write(rlogin->s, cfg->termspeed, p - cfg->termspeed);
+ rlogin->bufsize = sk_write(rlogin->s, &z, 1);
}
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 void rlogin_send (char *buf, int len) {
+static int rlogin_send(void *handle, char *buf, int len)
+{
+ Rlogin rlogin = (Rlogin) handle;
- if (s == NULL)
- return;
+ if (rlogin->s == NULL)
+ return 0;
+
+ rlogin->bufsize = sk_write(rlogin->s, buf, len);
+
+ return rlogin->bufsize;
+}
- sk_write(s, buf, len);
+/*
+ * 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) {
+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 };
- b[6] = cols >> 8; b[7] = cols & 0xFF;
- b[4] = rows >> 8; b[5] = rows & 0xFF;
- sk_write(s, b, 12);
+ 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 (Telnet_Special code) {
+static void rlogin_special(void *handle, Telnet_Special code)
+{
/* Do nothing! */
return;
}
-static Socket rlogin_socket(void) { return s; }
+/*
+ * 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_sendok(void) { return 1; }
+static int rlogin_connected(void *handle)
+{
+ Rlogin rlogin = (Rlogin) handle;
+ return rlogin->s != NULL;
+}
-static int rlogin_ldisc(int option) {
+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_socket,
+ 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,
1
};
projects / u / mdw / putty / blobdiff