checking in all the old panacean stuff

puttysrc/RAW.C

@@ -0,0 +1,282 @@
+/*
+ * "Raw" backend.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "putty.h"
+
+#ifndef FALSE
+#define FALSE 0
+#endif
+#ifndef TRUE
+#define TRUE 1
+#endif
+
+#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 bufsize;
+    void *frontend;
+} *Raw;
+
+static void raw_size(void *handle, int width, int height);
+
+static void c_write(Raw raw, char *buf, int len)
+{
+    int backlog = from_backend(raw->frontend, 0, buf, len);
+    sk_set_frozen(raw->s, backlog > RAW_MAX_BACKLOG);
+}
+
+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);
+}
+
+static int raw_closing(Plug plug, const char *error_msg, int error_code,
+		       int calling_back)
+{
+    Raw raw = (Raw) plug;
+
+    if (raw->s) {
+        sk_close(raw->s);
+        raw->s = NULL;
+	notify_remote_exit(raw->frontend);
+    }
+    if (error_msg) {
+	/* A socket error has occurred. */
+	logevent(raw->frontend, error_msg);
+	connection_fatal(raw->frontend, "%s", error_msg);
+    }				       /* Otherwise, the remote side closed the connection normally. */
+    return 0;
+}
+
+static int raw_receive(Plug plug, int urgent, char *data, int 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.
+ * 
+ * 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 *raw_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 = {
+	raw_log,
+	raw_closing,
+	raw_receive,
+	raw_sent
+    };
+    SockAddr addr;
+    const char *err;
+    Raw raw;
+
+    raw = snew(struct raw_backend_data);
+    raw->fn = &fn_table;
+    raw->s = NULL;
+    *backend_handle = raw;
+
+    raw->frontend = frontend_handle;
+
+    /*
+     * 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(raw->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 = 23;		       /* default telnet port */
+
+    /*
+     * Open socket.
+     */
+    raw->s = new_connection(addr, *realhost, port, 0, 1, nodelay, keepalive,
+			    (Plug) raw, cfg);
+    if ((err = sk_socket_error(raw->s)) != NULL)
+	return err;
+
+    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, Config *cfg)
+{
+}
+
+/*
+ * Called to send data down the raw connection.
+ */
+static int raw_send(void *handle, char *buf, int len)
+{
+    Raw raw = (Raw) handle;
+
+    if (raw->s == NULL)
+	return 0;
+
+    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 *handle, int width, int height)
+{
+    /* Do nothing! */
+    return;
+}
+
+/*
+ * Send raw special codes.
+ */
+static void raw_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 *raw_get_specials(void *handle)
+{
+    return NULL;
+}
+
+static int raw_connected(void *handle)
+{
+    Raw raw = (Raw) handle;
+    return raw->s != NULL;
+}
+
+static int raw_sendok(void *handle)
+{
+    return 1;
+}
+
+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
+        /* 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_get_specials,
+    raw_connected,
+    raw_exitcode,
+    raw_sendok,
+    raw_ldisc,
+    raw_provide_ldisc,
+    raw_provide_logctx,
+    raw_unthrottle,
+    raw_cfg_info,
+    1
+};