1 files changed, 118 insertions, 0 deletions
diff --git a/windows/local-proxy.c b/windows/local-proxy.c
new file mode 100644
index 00000000..55e9cbf3
--- /dev/null
+++ b/windows/local-proxy.c
@@ -0,0 +1,118 @@
+/*
+ * local-proxy.c: Windows implementation of platform_new_connection(),
+ * supporting an OpenSSH-like proxy command via the handle-io.c
+ * mechanism.
+ */
+
+#include <stdio.h>
+#include <assert.h>
+
+#include "tree234.h"
+#include "putty.h"
+#include "network.h"
+#include "proxy/proxy.h"
+
+char *platform_setup_local_proxy(Socket *socket, const char *cmd)
+{
+    HANDLE us_to_cmd, cmd_from_us;
+    HANDLE us_from_cmd, cmd_to_us;
+    HANDLE us_from_cmd_err, cmd_err_to_us;
+    SECURITY_ATTRIBUTES sa;
+    STARTUPINFO si;
+    PROCESS_INFORMATION pi;
+
+    /*
+     * 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)) {
+        return dupprintf("Unable to create pipes for proxy command: %s",
+                         win_strerror(GetLastError()));
+    }
+
+    if (!CreatePipe(&cmd_from_us, &us_to_cmd, &sa, 0)) {
+        CloseHandle(us_from_cmd);
+        CloseHandle(cmd_to_us);
+        return dupprintf("Unable to create pipes for proxy command: %s",
+                         win_strerror(GetLastError()));
+    }
+
+    if (!CreatePipe(&us_from_cmd_err, &cmd_err_to_us, &sa, 0)) {
+        CloseHandle(us_from_cmd);
+        CloseHandle(cmd_to_us);
+        CloseHandle(us_to_cmd);
+        CloseHandle(cmd_from_us);
+        return dupprintf("Unable to create pipes for proxy command: %s",
+                         win_strerror(GetLastError()));
+    }
+
+    SetHandleInformation(us_to_cmd, HANDLE_FLAG_INHERIT, 0);
+    SetHandleInformation(us_from_cmd, HANDLE_FLAG_INHERIT, 0);
+    if (us_from_cmd_err != NULL)
+        SetHandleInformation(us_from_cmd_err, 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 = cmd_err_to_us;
+    char *cmd_mutable = dupstr(cmd); /* CreateProcess needs non-const char * */
+    CreateProcess(NULL, cmd_mutable, NULL, NULL, true,
+                  CREATE_NO_WINDOW | NORMAL_PRIORITY_CLASS,
+                  NULL, NULL, &si, &pi);
+    sfree(cmd_mutable);
+    CloseHandle(pi.hProcess);
+    CloseHandle(pi.hThread);
+
+    CloseHandle(cmd_from_us);
+    CloseHandle(cmd_to_us);
+
+    if (cmd_err_to_us != NULL)
+        CloseHandle(cmd_err_to_us);
+
+    setup_handle_socket(socket, us_to_cmd, us_from_cmd, us_from_cmd_err,
+                        false);
+
+    return NULL;
+}
+
+Socket *platform_new_connection(SockAddr *addr, const char *hostname,
+                                int port, bool privport,
+                                bool oobinline, bool nodelay, bool keepalive,
+                                Plug *plug, Conf *conf, Interactor *itr)
+{
+    if (conf_get_int(conf, CONF_proxy_type) != PROXY_CMD)
+        return NULL;
+
+    DeferredSocketOpener *opener = local_proxy_opener(
+        addr, port, plug, conf, itr);
+    Socket *socket = make_deferred_handle_socket(opener, addr, port, plug);
+    local_proxy_opener_set_socket(opener, socket);
+    return socket;
+}
+
+Socket *platform_start_subprocess(const char *cmd, Plug *plug,
+                                  const char *prefix)
+{
+    Socket *socket = make_deferred_handle_socket(
+        null_deferred_socket_opener(),
+        sk_nonamelookup("<local command>"), 0, plug);
+    char *err = platform_setup_local_proxy(socket, cmd);
+    handle_socket_set_psb_prefix(socket, prefix);
+
+    if (err) {
+        sk_close(socket);
+        socket = new_error_socket_fmt(plug, "%s", err);
+        sfree(err);
+    }
+
+    return socket;
+}