2 * winproxy.c: Windows implementation of platform_new_connection(),
3 * supporting an OpenSSH-like proxy command via the winhandl.c
10 #define DEFINE_PLUG_METHOD_MACROS
16 typedef struct Socket_localproxy_tag *Local_Proxy_Socket;
18 struct Socket_localproxy_tag {
19 const struct socket_function_table *fn;
20 /* the above variable absolutely *must* be the first in this structure */
22 HANDLE to_cmd_H, from_cmd_H;
23 struct handle *to_cmd_h, *from_cmd_h;
32 int localproxy_gotdata(struct handle *h, void *data, int len)
34 Local_Proxy_Socket ps = (Local_Proxy_Socket) handle_get_privdata(h);
37 return plug_closing(ps->plug, "Read error from local proxy command",
39 } else if (len == 0) {
40 return plug_closing(ps->plug, NULL, 0, 0);
42 return plug_receive(ps->plug, 0, data, len);
46 void localproxy_sentdata(struct handle *h, int new_backlog)
48 Local_Proxy_Socket ps = (Local_Proxy_Socket) handle_get_privdata(h);
50 plug_sent(ps->plug, new_backlog);
53 static Plug sk_localproxy_plug (Socket s, Plug p)
55 Local_Proxy_Socket ps = (Local_Proxy_Socket) s;
62 static void sk_localproxy_close (Socket s)
64 Local_Proxy_Socket ps = (Local_Proxy_Socket) s;
66 handle_free(ps->to_cmd_h);
67 handle_free(ps->from_cmd_h);
68 CloseHandle(ps->to_cmd_H);
69 CloseHandle(ps->from_cmd_H);
74 static int sk_localproxy_write (Socket s, const char *data, int len)
76 Local_Proxy_Socket ps = (Local_Proxy_Socket) s;
78 return handle_write(ps->to_cmd_h, data, len);
81 static int sk_localproxy_write_oob(Socket s, const char *data, int len)
84 * oob data is treated as inband; nasty, but nothing really
87 return sk_localproxy_write(s, data, len);
90 static void sk_localproxy_write_eof(Socket s)
92 Local_Proxy_Socket ps = (Local_Proxy_Socket) s;
94 handle_write_eof(ps->to_cmd_h);
97 static void sk_localproxy_flush(Socket s)
99 /* Local_Proxy_Socket ps = (Local_Proxy_Socket) s; */
103 static void sk_localproxy_set_private_ptr(Socket s, void *ptr)
105 Local_Proxy_Socket ps = (Local_Proxy_Socket) s;
109 static void *sk_localproxy_get_private_ptr(Socket s)
111 Local_Proxy_Socket ps = (Local_Proxy_Socket) s;
115 static void sk_localproxy_set_frozen(Socket s, int is_frozen)
117 Local_Proxy_Socket ps = (Local_Proxy_Socket) s;
124 static const char *sk_localproxy_socket_error(Socket s)
126 Local_Proxy_Socket ps = (Local_Proxy_Socket) s;
130 Socket platform_new_connection(SockAddr addr, char *hostname,
131 int port, int privport,
132 int oobinline, int nodelay, int keepalive,
133 Plug plug, Conf *conf)
137 static const struct socket_function_table socket_fn_table = {
141 sk_localproxy_write_oob,
142 sk_localproxy_write_eof,
144 sk_localproxy_set_private_ptr,
145 sk_localproxy_get_private_ptr,
146 sk_localproxy_set_frozen,
147 sk_localproxy_socket_error
150 Local_Proxy_Socket ret;
151 HANDLE us_to_cmd, us_from_cmd, cmd_to_us, cmd_from_us;
152 SECURITY_ATTRIBUTES sa;
154 PROCESS_INFORMATION pi;
156 if (conf_get_int(conf, CONF_proxy_type) != PROXY_CMD)
159 cmd = format_telnet_command(addr, port, conf);
162 char *msg = dupprintf("Starting local proxy command: %s", cmd);
163 /* We're allowed to pass NULL here, because we're part of the Windows
164 * front end so we know logevent doesn't expect any data. */
169 ret = snew(struct Socket_localproxy_tag);
170 ret->fn = &socket_fn_table;
175 * Create the pipes to the proxy command, and spawn the proxy
178 sa.nLength = sizeof(sa);
179 sa.lpSecurityDescriptor = NULL; /* default */
180 sa.bInheritHandle = TRUE;
181 if (!CreatePipe(&us_from_cmd, &cmd_to_us, &sa, 0)) {
182 ret->error = dupprintf("Unable to create pipes for proxy command");
186 if (!CreatePipe(&cmd_from_us, &us_to_cmd, &sa, 0)) {
187 CloseHandle(us_from_cmd);
188 CloseHandle(cmd_to_us);
189 ret->error = dupprintf("Unable to create pipes for proxy command");
193 SetHandleInformation(us_to_cmd, HANDLE_FLAG_INHERIT, 0);
194 SetHandleInformation(us_from_cmd, HANDLE_FLAG_INHERIT, 0);
197 si.lpReserved = NULL;
200 si.dwFlags = STARTF_USESTDHANDLES;
202 si.lpReserved2 = NULL;
203 si.hStdInput = cmd_from_us;
204 si.hStdOutput = cmd_to_us;
206 CreateProcess(NULL, cmd, NULL, NULL, TRUE,
207 CREATE_NO_WINDOW | NORMAL_PRIORITY_CLASS,
208 NULL, NULL, &si, &pi);
212 CloseHandle(cmd_from_us);
213 CloseHandle(cmd_to_us);
215 ret->to_cmd_H = us_to_cmd;
216 ret->from_cmd_H = us_from_cmd;
218 ret->from_cmd_h = handle_input_new(ret->from_cmd_H, localproxy_gotdata,
220 ret->to_cmd_h = handle_output_new(ret->to_cmd_H, localproxy_sentdata,
223 /* We are responsible for this and don't need it any more */