-#include <windows.h>
+/*
+ * "Raw" backend.
+ */
+
#include <stdio.h>
#include <stdlib.h>
+#include <limits.h>
#include "putty.h"
#define TRUE 1
#endif
-static Socket s = NULL;
+#define RAW_MAX_BACKLOG 4096
+
+typedef struct raw_backend_data {
+ const struct plug_function_table *fn;
+ /* the above field _must_ be first in the structure */
+
+ Socket s;
+ int closed_on_socket_error;
+ int bufsize;
+ void *frontend;
+ int sent_console_eof, sent_socket_eof;
+} *Raw;
-static void raw_size(void);
+static void raw_size(void *handle, int width, int height);
-static void c_write(char *buf, int len)
+static void c_write(Raw raw, char *buf, int len)
{
- from_backend(0, buf, len);
+ int backlog = from_backend(raw->frontend, 0, buf, len);
+ sk_set_frozen(raw->s, backlog > RAW_MAX_BACKLOG);
}
-static int raw_closing(Plug plug, char *error_msg, int error_code,
- int calling_back)
+static void raw_log(Plug plug, int type, SockAddr addr, int port,
+ const char *error_msg, int error_code)
+{
+ Raw raw = (Raw) 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(raw->frontend, msg);
+ sfree(msg);
+}
+
+static void raw_check_close(Raw raw)
{
- if (s) {
- sk_close(s);
- s = NULL;
+ /*
+ * Called after we send EOF on either the socket or the console.
+ * Its job is to wind up the session once we have sent EOF on both.
+ */
+ if (raw->sent_console_eof && raw->sent_socket_eof) {
+ if (raw->s) {
+ sk_close(raw->s);
+ raw->s = NULL;
+ notify_remote_exit(raw->frontend);
+ }
}
+}
+
+static int raw_closing(Plug plug, const char *error_msg, int error_code,
+ int calling_back)
+{
+ Raw raw = (Raw) plug;
+
if (error_msg) {
- /* A socket error has occurred. */
- connection_fatal(error_msg);
- } /* Otherwise, the remote side closed the connection normally. */
+ /* A socket error has occurred. */
+ if (raw->s) {
+ sk_close(raw->s);
+ raw->s = NULL;
+ raw->closed_on_socket_error = TRUE;
+ notify_remote_exit(raw->frontend);
+ }
+ logevent(raw->frontend, error_msg);
+ connection_fatal(raw->frontend, "%s", error_msg);
+ } else {
+ /* Otherwise, the remote side closed the connection normally. */
+ if (!raw->sent_console_eof && from_backend_eof(raw->frontend)) {
+ /*
+ * The front end wants us to close the outgoing side of the
+ * connection as soon as we see EOF from the far end.
+ */
+ if (!raw->sent_socket_eof) {
+ if (raw->s)
+ sk_write_eof(raw->s);
+ raw->sent_socket_eof= TRUE;
+ }
+ }
+ raw->sent_console_eof = TRUE;
+ raw_check_close(raw);
+ }
return 0;
}
static int raw_receive(Plug plug, int urgent, char *data, int len)
{
- c_write(data, len);
+ Raw raw = (Raw) plug;
+ c_write(raw, data, len);
return 1;
}
+static void raw_sent(Plug plug, int bufsize)
+{
+ Raw raw = (Raw) plug;
+ raw->bufsize = bufsize;
+}
+
/*
* Called to set up the raw connection.
*
* Also places the canonical host name into `realhost'. It must be
* freed by the caller.
*/
-static char *raw_init(char *host, int port, char **realhost)
+static const char *raw_init(void *frontend_handle, void **backend_handle,
+ Conf *conf,
+ char *host, int port, char **realhost, int nodelay,
+ int keepalive)
{
- static struct plug_function_table fn_table = {
+ static const struct plug_function_table fn_table = {
+ raw_log,
raw_closing,
- raw_receive
- }, *fn_table_ptr = &fn_table;
-
+ raw_receive,
+ raw_sent
+ };
SockAddr addr;
- char *err;
+ const char *err;
+ Raw raw;
+ int addressfamily;
+ char *loghost;
+
+ raw = snew(struct raw_backend_data);
+ raw->fn = &fn_table;
+ raw->s = NULL;
+ raw->closed_on_socket_error = FALSE;
+ *backend_handle = raw;
+ raw->sent_console_eof = raw->sent_socket_eof = FALSE;
+ raw->frontend = frontend_handle;
+
+ addressfamily = conf_get_int(conf, CONF_addressfamily);
/*
* 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,
+ (addressfamily == ADDRTYPE_IPV4 ? " (IPv4)" :
+ (addressfamily == ADDRTYPE_IPV6 ? " (IPv6)" :
+ "")));
+ logevent(raw->frontend, buf);
+ sfree(buf);
+ }
+ 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 = 23; /* default telnet port */
/*
* Open socket.
*/
- s = sk_new(addr, port, 0, 1, &fn_table_ptr);
- if ((err = sk_socket_error(s)))
+ raw->s = new_connection(addr, *realhost, port, 0, 1, nodelay, keepalive,
+ (Plug) raw, conf);
+ if ((err = sk_socket_error(raw->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';
+ }
+ }
return NULL;
}
+static void raw_free(void *handle)
+{
+ Raw raw = (Raw) handle;
+
+ if (raw->s)
+ sk_close(raw->s);
+ sfree(raw);
+}
+
+/*
+ * Stub routine (we don't have any need to reconfigure this backend).
+ */
+static void raw_reconfig(void *handle, Conf *conf)
+{
+}
+
/*
* Called to send data down the raw connection.
*/
-static void raw_send(char *buf, int len)
+static int raw_send(void *handle, char *buf, int len)
{
+ Raw raw = (Raw) handle;
- if (s == NULL)
- return;
+ if (raw->s == NULL)
+ return 0;
- sk_write(s, buf, len);
+ raw->bufsize = sk_write(raw->s, buf, len);
+
+ return raw->bufsize;
+}
+
+/*
+ * Called to query the current socket sendability status.
+ */
+static int raw_sendbuffer(void *handle)
+{
+ Raw raw = (Raw) handle;
+ return raw->bufsize;
}
/*
* Called to set the size of the window
*/
-static void raw_size(void)
+static void raw_size(void *handle, int width, int height)
{
/* Do nothing! */
return;
}
/*
- * Send raw special codes.
+ * Send raw special codes. We only handle outgoing EOF here.
*/
-static void raw_special(Telnet_Special code)
+static void raw_special(void *handle, Telnet_Special code)
{
- /* Do nothing! */
+ Raw raw = (Raw) handle;
+ if (code == TS_EOF && raw->s) {
+ sk_write_eof(raw->s);
+ raw->sent_socket_eof= TRUE;
+ raw_check_close(raw);
+ }
+
return;
}
-static Socket raw_socket(void)
+/*
+ * Return a list of the special codes that make sense in this
+ * protocol.
+ */
+static const struct telnet_special *raw_get_specials(void *handle)
+{
+ return NULL;
+}
+
+static int raw_connected(void *handle)
{
- return s;
+ Raw raw = (Raw) handle;
+ return raw->s != NULL;
}
-static int raw_sendok(void)
+static int raw_sendok(void *handle)
{
return 1;
}
-static int raw_ldisc(int option)
+static void raw_unthrottle(void *handle, int backlog)
+{
+ Raw raw = (Raw) handle;
+ sk_set_frozen(raw->s, backlog > RAW_MAX_BACKLOG);
+}
+
+static int raw_ldisc(void *handle, int option)
{
if (option == LD_EDIT || option == LD_ECHO)
return 1;
return 0;
}
+static void raw_provide_ldisc(void *handle, void *ldisc)
+{
+ /* This is a stub. */
+}
+
+static void raw_provide_logctx(void *handle, void *logctx)
+{
+ /* This is a stub. */
+}
+
+static int raw_exitcode(void *handle)
+{
+ Raw raw = (Raw) handle;
+ if (raw->s != NULL)
+ return -1; /* still connected */
+ else if (raw->closed_on_socket_error)
+ return INT_MAX; /* a socket error counts as an unclean exit */
+ else
+ /* Exit codes are a meaningless concept in the Raw protocol */
+ return 0;
+}
+
+/*
+ * cfg_info for Raw does nothing at all.
+ */
+static int raw_cfg_info(void *handle)
+{
+ return 0;
+}
+
Backend raw_backend = {
raw_init,
+ raw_free,
+ raw_reconfig,
raw_send,
+ raw_sendbuffer,
raw_size,
raw_special,
- raw_socket,
+ raw_get_specials,
+ raw_connected,
+ raw_exitcode,
raw_sendok,
raw_ldisc,
- 1
+ raw_provide_ldisc,
+ raw_provide_logctx,
+ raw_unthrottle,
+ raw_cfg_info,
+ "raw",
+ PROT_RAW,
+ 0
};
projects / u / mdw / putty / blobdiff