diff options
Diffstat (limited to 'tools/plink/winproxy.c')
| -rw-r--r-- | tools/plink/winproxy.c | 217 |
1 files changed, 217 insertions, 0 deletions
diff --git a/tools/plink/winproxy.c b/tools/plink/winproxy.c new file mode 100644 index 000000000..45998e400 --- /dev/null +++ b/tools/plink/winproxy.c @@ -0,0 +1,217 @@ +/*
+ * winproxy.c: Windows implementation of platform_new_connection(),
+ * supporting an OpenSSH-like proxy command via the winhandl.c
+ * mechanism.
+ */
+
+#include <stdio.h>
+#include <assert.h>
+
+#define DEFINE_PLUG_METHOD_MACROS
+#include "tree234.h"
+#include "putty.h"
+#include "network.h"
+#include "proxy.h"
+
+typedef struct Socket_localproxy_tag *Local_Proxy_Socket;
+
+struct Socket_localproxy_tag {
+ const struct socket_function_table *fn;
+ /* the above variable absolutely *must* be the first in this structure */
+
+ HANDLE to_cmd_H, from_cmd_H;
+ struct handle *to_cmd_h, *from_cmd_h;
+
+ char *error;
+
+ Plug plug;
+
+ void *privptr;
+};
+
+int localproxy_gotdata(struct handle *h, void *data, int len)
+{
+ Local_Proxy_Socket ps = (Local_Proxy_Socket) handle_get_privdata(h);
+
+ if (len < 0) {
+ return plug_closing(ps->plug, "Read error from local proxy command",
+ 0, 0);
+ } else if (len == 0) {
+ return plug_closing(ps->plug, NULL, 0, 0);
+ } else {
+ return plug_receive(ps->plug, 0, data, len);
+ }
+}
+
+void localproxy_sentdata(struct handle *h, int new_backlog)
+{
+ Local_Proxy_Socket ps = (Local_Proxy_Socket) handle_get_privdata(h);
+
+ plug_sent(ps->plug, new_backlog);
+}
+
+static Plug sk_localproxy_plug (Socket s, Plug p)
+{
+ Local_Proxy_Socket ps = (Local_Proxy_Socket) s;
+ Plug ret = ps->plug;
+ if (p)
+ ps->plug = p;
+ return ret;
+}
+
+static void sk_localproxy_close (Socket s)
+{
+ Local_Proxy_Socket ps = (Local_Proxy_Socket) s;
+
+ handle_free(ps->to_cmd_h);
+ handle_free(ps->from_cmd_h);
+ CloseHandle(ps->to_cmd_H);
+ CloseHandle(ps->from_cmd_H);
+
+ sfree(ps);
+}
+
+static int sk_localproxy_write (Socket s, const char *data, int len)
+{
+ Local_Proxy_Socket ps = (Local_Proxy_Socket) s;
+
+ return handle_write(ps->to_cmd_h, data, len);
+}
+
+static int sk_localproxy_write_oob(Socket s, const char *data, int len)
+{
+ /*
+ * oob data is treated as inband; nasty, but nothing really
+ * better we can do
+ */
+ return sk_localproxy_write(s, data, len);
+}
+
+static void sk_localproxy_flush(Socket s)
+{
+ /* Local_Proxy_Socket ps = (Local_Proxy_Socket) s; */
+ /* do nothing */
+}
+
+static void sk_localproxy_set_private_ptr(Socket s, void *ptr)
+{
+ Local_Proxy_Socket ps = (Local_Proxy_Socket) s;
+ ps->privptr = ptr;
+}
+
+static void *sk_localproxy_get_private_ptr(Socket s)
+{
+ Local_Proxy_Socket ps = (Local_Proxy_Socket) s;
+ return ps->privptr;
+}
+
+static void sk_localproxy_set_frozen(Socket s, int is_frozen)
+{
+ Local_Proxy_Socket ps = (Local_Proxy_Socket) s;
+
+ /*
+ * FIXME
+ */
+}
+
+static const char *sk_localproxy_socket_error(Socket s)
+{
+ Local_Proxy_Socket ps = (Local_Proxy_Socket) s;
+ return ps->error;
+}
+
+Socket platform_new_connection(SockAddr addr, char *hostname,
+ int port, int privport,
+ int oobinline, int nodelay, int keepalive,
+ Plug plug, const Config *cfg)
+{
+ char *cmd;
+
+ static const struct socket_function_table socket_fn_table = {
+ sk_localproxy_plug,
+ sk_localproxy_close,
+ sk_localproxy_write,
+ sk_localproxy_write_oob,
+ sk_localproxy_flush,
+ sk_localproxy_set_private_ptr,
+ sk_localproxy_get_private_ptr,
+ sk_localproxy_set_frozen,
+ sk_localproxy_socket_error
+ };
+
+ Local_Proxy_Socket ret;
+ HANDLE us_to_cmd, us_from_cmd, cmd_to_us, cmd_from_us;
+ SECURITY_ATTRIBUTES sa;
+ STARTUPINFO si;
+ PROCESS_INFORMATION pi;
+
+ if (cfg->proxy_type != PROXY_CMD)
+ return NULL;
+
+ cmd = format_telnet_command(addr, port, cfg);
+
+ {
+ char *msg = dupprintf("Starting local proxy command: %s", cmd);
+ /* We're allowed to pass NULL here, because we're part of the Windows
+ * front end so we know logevent doesn't expect any data. */
+ logevent(NULL, msg);
+ sfree(msg);
+ }
+
+ ret = snew(struct Socket_localproxy_tag);
+ ret->fn = &socket_fn_table;
+ ret->plug = plug;
+ ret->error = NULL;
+
+ /*
+ * Create the pipes to the proxy command, and spawn the proxy
+ * command process.
+ */
+ sa.nLength = sizeof(sa);
+ sa.lpSecurityDescriptor = NULL; /* default */
+ sa.bInheritHandle = TRUE;
+ if (!CreatePipe(&us_from_cmd, &cmd_to_us, &sa, 0)) {
+ ret->error = dupprintf("Unable to create pipes for proxy command");
+ return (Socket)ret;
+ }
+
+ if (!CreatePipe(&cmd_from_us, &us_to_cmd, &sa, 0)) {
+ CloseHandle(us_from_cmd);
+ CloseHandle(cmd_to_us);
+ ret->error = dupprintf("Unable to create pipes for proxy command");
+ return (Socket)ret;
+ }
+
+ SetHandleInformation(us_to_cmd, HANDLE_FLAG_INHERIT, 0);
+ SetHandleInformation(us_from_cmd, HANDLE_FLAG_INHERIT, 0);
+
+ si.cb = sizeof(si);
+ si.lpReserved = NULL;
+ si.lpDesktop = NULL;
+ si.lpTitle = NULL;
+ si.dwFlags = STARTF_USESTDHANDLES;
+ si.cbReserved2 = 0;
+ si.lpReserved2 = NULL;
+ si.hStdInput = cmd_from_us;
+ si.hStdOutput = cmd_to_us;
+ si.hStdError = NULL;
+ CreateProcess(NULL, cmd, NULL, NULL, TRUE,
+ CREATE_NO_WINDOW | NORMAL_PRIORITY_CLASS,
+ NULL, NULL, &si, &pi);
+
+ CloseHandle(cmd_from_us);
+ CloseHandle(cmd_to_us);
+
+ ret->to_cmd_H = us_to_cmd;
+ ret->from_cmd_H = us_from_cmd;
+
+ ret->from_cmd_h = handle_input_new(ret->from_cmd_H, localproxy_gotdata,
+ ret, 0);
+ ret->to_cmd_h = handle_output_new(ret->to_cmd_H, localproxy_sentdata,
+ ret, 0);
+
+ /* We are responsible for this and don't need it any more */
+ sk_addr_free(addr);
+
+ return (Socket) ret;
+}
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