--- /dev/null
+/*\r
+ * "Raw" backend.\r
+ */\r
+\r
+#include <stdio.h>\r
+#include <stdlib.h>\r
+\r
+#include "putty.h"\r
+\r
+#ifndef FALSE\r
+#define FALSE 0\r
+#endif\r
+#ifndef TRUE\r
+#define TRUE 1\r
+#endif\r
+\r
+#define RAW_MAX_BACKLOG 4096\r
+\r
+typedef struct raw_backend_data {\r
+ const struct plug_function_table *fn;\r
+ /* the above field _must_ be first in the structure */\r
+\r
+ Socket s;\r
+ int bufsize;\r
+ void *frontend;\r
+} *Raw;\r
+\r
+static void raw_size(void *handle, int width, int height);\r
+\r
+static void c_write(Raw raw, char *buf, int len)\r
+{\r
+ int backlog = from_backend(raw->frontend, 0, buf, len);\r
+ sk_set_frozen(raw->s, backlog > RAW_MAX_BACKLOG);\r
+}\r
+\r
+static void raw_log(Plug plug, int type, SockAddr addr, int port,\r
+ const char *error_msg, int error_code)\r
+{\r
+ Raw raw = (Raw) plug;\r
+ char addrbuf[256], *msg;\r
+\r
+ sk_getaddr(addr, addrbuf, lenof(addrbuf));\r
+\r
+ if (type == 0)\r
+ msg = dupprintf("Connecting to %s port %d", addrbuf, port);\r
+ else\r
+ msg = dupprintf("Failed to connect to %s: %s", addrbuf, error_msg);\r
+\r
+ logevent(raw->frontend, msg);\r
+}\r
+\r
+static int raw_closing(Plug plug, const char *error_msg, int error_code,\r
+ int calling_back)\r
+{\r
+ Raw raw = (Raw) plug;\r
+\r
+ if (raw->s) {\r
+ sk_close(raw->s);\r
+ raw->s = NULL;\r
+ notify_remote_exit(raw->frontend);\r
+ }\r
+ if (error_msg) {\r
+ /* A socket error has occurred. */\r
+ logevent(raw->frontend, error_msg);\r
+ connection_fatal(raw->frontend, "%s", error_msg);\r
+ } /* Otherwise, the remote side closed the connection normally. */\r
+ return 0;\r
+}\r
+\r
+static int raw_receive(Plug plug, int urgent, char *data, int len)\r
+{\r
+ Raw raw = (Raw) plug;\r
+ c_write(raw, data, len);\r
+ return 1;\r
+}\r
+\r
+static void raw_sent(Plug plug, int bufsize)\r
+{\r
+ Raw raw = (Raw) plug;\r
+ raw->bufsize = bufsize;\r
+}\r
+\r
+/*\r
+ * Called to set up the raw connection.\r
+ * \r
+ * Returns an error message, or NULL on success.\r
+ *\r
+ * Also places the canonical host name into `realhost'. It must be\r
+ * freed by the caller.\r
+ */\r
+static const char *raw_init(void *frontend_handle, void **backend_handle,\r
+ Config *cfg,\r
+ char *host, int port, char **realhost, int nodelay,\r
+ int keepalive)\r
+{\r
+ static const struct plug_function_table fn_table = {\r
+ raw_log,\r
+ raw_closing,\r
+ raw_receive,\r
+ raw_sent\r
+ };\r
+ SockAddr addr;\r
+ const char *err;\r
+ Raw raw;\r
+\r
+ raw = snew(struct raw_backend_data);\r
+ raw->fn = &fn_table;\r
+ raw->s = NULL;\r
+ *backend_handle = raw;\r
+\r
+ raw->frontend = frontend_handle;\r
+\r
+ /*\r
+ * Try to find host.\r
+ */\r
+ {\r
+ char *buf;\r
+ buf = dupprintf("Looking up host \"%s\"%s", host,\r
+ (cfg->addressfamily == ADDRTYPE_IPV4 ? " (IPv4)" :\r
+ (cfg->addressfamily == ADDRTYPE_IPV6 ? " (IPv6)" :\r
+ "")));\r
+ logevent(raw->frontend, buf);\r
+ sfree(buf);\r
+ }\r
+ addr = name_lookup(host, port, realhost, cfg, cfg->addressfamily);\r
+ if ((err = sk_addr_error(addr)) != NULL) {\r
+ sk_addr_free(addr);\r
+ return err;\r
+ }\r
+\r
+ if (port < 0)\r
+ port = 23; /* default telnet port */\r
+\r
+ /*\r
+ * Open socket.\r
+ */\r
+ raw->s = new_connection(addr, *realhost, port, 0, 1, nodelay, keepalive,\r
+ (Plug) raw, cfg);\r
+ if ((err = sk_socket_error(raw->s)) != NULL)\r
+ return err;\r
+\r
+ if (*cfg->loghost) {\r
+ char *colon;\r
+\r
+ sfree(*realhost);\r
+ *realhost = dupstr(cfg->loghost);\r
+ colon = strrchr(*realhost, ':');\r
+ if (colon) {\r
+ /*\r
+ * FIXME: if we ever update this aspect of ssh.c for\r
+ * IPv6 literal management, this should change in line\r
+ * with it.\r
+ */\r
+ *colon++ = '\0';\r
+ }\r
+ }\r
+\r
+ return NULL;\r
+}\r
+\r
+static void raw_free(void *handle)\r
+{\r
+ Raw raw = (Raw) handle;\r
+\r
+ if (raw->s)\r
+ sk_close(raw->s);\r
+ sfree(raw);\r
+}\r
+\r
+/*\r
+ * Stub routine (we don't have any need to reconfigure this backend).\r
+ */\r
+static void raw_reconfig(void *handle, Config *cfg)\r
+{\r
+}\r
+\r
+/*\r
+ * Called to send data down the raw connection.\r
+ */\r
+static int raw_send(void *handle, char *buf, int len)\r
+{\r
+ Raw raw = (Raw) handle;\r
+\r
+ if (raw->s == NULL)\r
+ return 0;\r
+\r
+ raw->bufsize = sk_write(raw->s, buf, len);\r
+\r
+ return raw->bufsize;\r
+}\r
+\r
+/*\r
+ * Called to query the current socket sendability status.\r
+ */\r
+static int raw_sendbuffer(void *handle)\r
+{\r
+ Raw raw = (Raw) handle;\r
+ return raw->bufsize;\r
+}\r
+\r
+/*\r
+ * Called to set the size of the window\r
+ */\r
+static void raw_size(void *handle, int width, int height)\r
+{\r
+ /* Do nothing! */\r
+ return;\r
+}\r
+\r
+/*\r
+ * Send raw special codes.\r
+ */\r
+static void raw_special(void *handle, Telnet_Special code)\r
+{\r
+ /* Do nothing! */\r
+ return;\r
+}\r
+\r
+/*\r
+ * Return a list of the special codes that make sense in this\r
+ * protocol.\r
+ */\r
+static const struct telnet_special *raw_get_specials(void *handle)\r
+{\r
+ return NULL;\r
+}\r
+\r
+static int raw_connected(void *handle)\r
+{\r
+ Raw raw = (Raw) handle;\r
+ return raw->s != NULL;\r
+}\r
+\r
+static int raw_sendok(void *handle)\r
+{\r
+ return 1;\r
+}\r
+\r
+static void raw_unthrottle(void *handle, int backlog)\r
+{\r
+ Raw raw = (Raw) handle;\r
+ sk_set_frozen(raw->s, backlog > RAW_MAX_BACKLOG);\r
+}\r
+\r
+static int raw_ldisc(void *handle, int option)\r
+{\r
+ if (option == LD_EDIT || option == LD_ECHO)\r
+ return 1;\r
+ return 0;\r
+}\r
+\r
+static void raw_provide_ldisc(void *handle, void *ldisc)\r
+{\r
+ /* This is a stub. */\r
+}\r
+\r
+static void raw_provide_logctx(void *handle, void *logctx)\r
+{\r
+ /* This is a stub. */\r
+}\r
+\r
+static int raw_exitcode(void *handle)\r
+{\r
+ Raw raw = (Raw) handle;\r
+ if (raw->s != NULL)\r
+ return -1; /* still connected */\r
+ else\r
+ /* Exit codes are a meaningless concept in the Raw protocol */\r
+ return 0;\r
+}\r
+\r
+/*\r
+ * cfg_info for Raw does nothing at all.\r
+ */\r
+static int raw_cfg_info(void *handle)\r
+{\r
+ return 0;\r
+}\r
+\r
+Backend raw_backend = {\r
+ raw_init,\r
+ raw_free,\r
+ raw_reconfig,\r
+ raw_send,\r
+ raw_sendbuffer,\r
+ raw_size,\r
+ raw_special,\r
+ raw_get_specials,\r
+ raw_connected,\r
+ raw_exitcode,\r
+ raw_sendok,\r
+ raw_ldisc,\r
+ raw_provide_ldisc,\r
+ raw_provide_logctx,\r
+ raw_unthrottle,\r
+ raw_cfg_info,\r
+ "raw",\r
+ PROT_RAW,\r
+ 0\r
+};\r
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