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, 1, 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_flush(Socket s)
92 /* Local_Proxy_Socket ps = (Local_Proxy_Socket) s; */
96 static void sk_localproxy_set_private_ptr(Socket s, void *ptr)
98 Local_Proxy_Socket ps = (Local_Proxy_Socket) s;
102 static void *sk_localproxy_get_private_ptr(Socket s)
104 Local_Proxy_Socket ps = (Local_Proxy_Socket) s;
108 static void sk_localproxy_set_frozen(Socket s, int is_frozen)
110 Local_Proxy_Socket ps = (Local_Proxy_Socket) s;
117 static const char *sk_localproxy_socket_error(Socket s)
119 Local_Proxy_Socket ps = (Local_Proxy_Socket) s;
123 Socket platform_new_connection(SockAddr addr, char *hostname,
124 int port, int privport,
125 int oobinline, int nodelay, int keepalive,
126 Plug plug, const Config *cfg)
130 static const struct socket_function_table socket_fn_table = {
134 sk_localproxy_write_oob,
136 sk_localproxy_set_private_ptr,
137 sk_localproxy_get_private_ptr,
138 sk_localproxy_set_frozen,
139 sk_localproxy_socket_error
142 Local_Proxy_Socket ret;
143 HANDLE us_to_cmd, us_from_cmd, cmd_to_us, cmd_from_us;
144 SECURITY_ATTRIBUTES sa;
146 PROCESS_INFORMATION pi;
148 if (cfg->proxy_type != PROXY_CMD)
151 cmd = format_telnet_command(addr, port, cfg);
154 char *msg = dupprintf("Starting local proxy command: %s", cmd);
155 /* We're allowed to pass NULL here, because we're part of the Windows
156 * front end so we know logevent doesn't expect any data. */
161 ret = snew(struct Socket_localproxy_tag);
162 ret->fn = &socket_fn_table;
167 * Create the pipes to the proxy command, and spawn the proxy
170 sa.nLength = sizeof(sa);
171 sa.lpSecurityDescriptor = NULL; /* default */
172 sa.bInheritHandle = TRUE;
173 if (!CreatePipe(&us_from_cmd, &cmd_to_us, &sa, 0)) {
174 ret->error = dupprintf("Unable to create pipes for proxy command");
178 if (!CreatePipe(&cmd_from_us, &us_to_cmd, &sa, 0)) {
179 CloseHandle(us_from_cmd);
180 CloseHandle(cmd_to_us);
181 ret->error = dupprintf("Unable to create pipes for proxy command");
185 SetHandleInformation(us_to_cmd, HANDLE_FLAG_INHERIT, 0);
186 SetHandleInformation(us_from_cmd, HANDLE_FLAG_INHERIT, 0);
189 si.lpReserved = NULL;
192 si.dwFlags = STARTF_USESTDHANDLES;
194 si.lpReserved2 = NULL;
195 si.hStdInput = cmd_from_us;
196 si.hStdOutput = cmd_to_us;
198 CreateProcess(NULL, cmd, NULL, NULL, TRUE,
199 CREATE_NO_WINDOW | NORMAL_PRIORITY_CLASS,
200 NULL, NULL, &si, &pi);
202 CloseHandle(cmd_from_us);
203 CloseHandle(cmd_to_us);
205 ret->to_cmd_H = us_to_cmd;
206 ret->from_cmd_H = us_from_cmd;
208 ret->from_cmd_h = handle_input_new(ret->from_cmd_H, localproxy_gotdata,
210 ret->to_cmd_h = handle_output_new(ret->to_cmd_H, localproxy_sentdata,
213 /* We are responsible for this and don't need it any more */