]>
Commit | Line | Data |
---|---|---|
1c1af145 | 1 | /* |
2 | * winproxy.c: Windows implementation of platform_new_connection(), | |
3 | * supporting an OpenSSH-like proxy command via the winhandl.c | |
4 | * mechanism. | |
5 | */ | |
6 | ||
7 | #include <stdio.h> | |
8 | #include <assert.h> | |
9 | ||
10 | #define DEFINE_PLUG_METHOD_MACROS | |
11 | #include "tree234.h" | |
12 | #include "putty.h" | |
13 | #include "network.h" | |
14 | #include "proxy.h" | |
15 | ||
16 | typedef struct Socket_localproxy_tag *Local_Proxy_Socket; | |
17 | ||
18 | struct Socket_localproxy_tag { | |
19 | const struct socket_function_table *fn; | |
20 | /* the above variable absolutely *must* be the first in this structure */ | |
21 | ||
22 | HANDLE to_cmd_H, from_cmd_H; | |
23 | struct handle *to_cmd_h, *from_cmd_h; | |
24 | ||
25 | char *error; | |
26 | ||
27 | Plug plug; | |
28 | ||
29 | void *privptr; | |
30 | }; | |
31 | ||
32 | int localproxy_gotdata(struct handle *h, void *data, int len) | |
33 | { | |
34 | Local_Proxy_Socket ps = (Local_Proxy_Socket) handle_get_privdata(h); | |
35 | ||
36 | if (len < 0) { | |
37 | return plug_closing(ps->plug, "Read error from local proxy command", | |
38 | 0, 0); | |
39 | } else if (len == 0) { | |
40 | return plug_closing(ps->plug, NULL, 0, 0); | |
41 | } else { | |
42 | return plug_receive(ps->plug, 0, data, len); | |
43 | } | |
44 | } | |
45 | ||
46 | void localproxy_sentdata(struct handle *h, int new_backlog) | |
47 | { | |
48 | Local_Proxy_Socket ps = (Local_Proxy_Socket) handle_get_privdata(h); | |
49 | ||
50 | plug_sent(ps->plug, new_backlog); | |
51 | } | |
52 | ||
53 | static Plug sk_localproxy_plug (Socket s, Plug p) | |
54 | { | |
55 | Local_Proxy_Socket ps = (Local_Proxy_Socket) s; | |
56 | Plug ret = ps->plug; | |
57 | if (p) | |
58 | ps->plug = p; | |
59 | return ret; | |
60 | } | |
61 | ||
62 | static void sk_localproxy_close (Socket s) | |
63 | { | |
64 | Local_Proxy_Socket ps = (Local_Proxy_Socket) s; | |
65 | ||
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); | |
70 | ||
71 | sfree(ps); | |
72 | } | |
73 | ||
74 | static int sk_localproxy_write (Socket s, const char *data, int len) | |
75 | { | |
76 | Local_Proxy_Socket ps = (Local_Proxy_Socket) s; | |
77 | ||
78 | return handle_write(ps->to_cmd_h, data, len); | |
79 | } | |
80 | ||
81 | static int sk_localproxy_write_oob(Socket s, const char *data, int len) | |
82 | { | |
83 | /* | |
84 | * oob data is treated as inband; nasty, but nothing really | |
85 | * better we can do | |
86 | */ | |
87 | return sk_localproxy_write(s, data, len); | |
88 | } | |
89 | ||
90 | static void sk_localproxy_flush(Socket s) | |
91 | { | |
92 | /* Local_Proxy_Socket ps = (Local_Proxy_Socket) s; */ | |
93 | /* do nothing */ | |
94 | } | |
95 | ||
96 | static void sk_localproxy_set_private_ptr(Socket s, void *ptr) | |
97 | { | |
98 | Local_Proxy_Socket ps = (Local_Proxy_Socket) s; | |
99 | ps->privptr = ptr; | |
100 | } | |
101 | ||
102 | static void *sk_localproxy_get_private_ptr(Socket s) | |
103 | { | |
104 | Local_Proxy_Socket ps = (Local_Proxy_Socket) s; | |
105 | return ps->privptr; | |
106 | } | |
107 | ||
108 | static void sk_localproxy_set_frozen(Socket s, int is_frozen) | |
109 | { | |
110 | Local_Proxy_Socket ps = (Local_Proxy_Socket) s; | |
111 | ||
112 | /* | |
113 | * FIXME | |
114 | */ | |
115 | } | |
116 | ||
117 | static const char *sk_localproxy_socket_error(Socket s) | |
118 | { | |
119 | Local_Proxy_Socket ps = (Local_Proxy_Socket) s; | |
120 | return ps->error; | |
121 | } | |
122 | ||
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) | |
127 | { | |
128 | char *cmd; | |
129 | ||
130 | static const struct socket_function_table socket_fn_table = { | |
131 | sk_localproxy_plug, | |
132 | sk_localproxy_close, | |
133 | sk_localproxy_write, | |
134 | sk_localproxy_write_oob, | |
135 | sk_localproxy_flush, | |
136 | sk_localproxy_set_private_ptr, | |
137 | sk_localproxy_get_private_ptr, | |
138 | sk_localproxy_set_frozen, | |
139 | sk_localproxy_socket_error | |
140 | }; | |
141 | ||
142 | Local_Proxy_Socket ret; | |
143 | HANDLE us_to_cmd, us_from_cmd, cmd_to_us, cmd_from_us; | |
144 | SECURITY_ATTRIBUTES sa; | |
145 | STARTUPINFO si; | |
146 | PROCESS_INFORMATION pi; | |
147 | ||
148 | if (cfg->proxy_type != PROXY_CMD) | |
149 | return NULL; | |
150 | ||
151 | cmd = format_telnet_command(addr, port, cfg); | |
152 | ||
153 | { | |
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. */ | |
157 | logevent(NULL, msg); | |
158 | sfree(msg); | |
159 | } | |
160 | ||
161 | ret = snew(struct Socket_localproxy_tag); | |
162 | ret->fn = &socket_fn_table; | |
163 | ret->plug = plug; | |
164 | ret->error = NULL; | |
165 | ||
166 | /* | |
167 | * Create the pipes to the proxy command, and spawn the proxy | |
168 | * command process. | |
169 | */ | |
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"); | |
175 | return (Socket)ret; | |
176 | } | |
177 | ||
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"); | |
182 | return (Socket)ret; | |
183 | } | |
184 | ||
185 | SetHandleInformation(us_to_cmd, HANDLE_FLAG_INHERIT, 0); | |
186 | SetHandleInformation(us_from_cmd, HANDLE_FLAG_INHERIT, 0); | |
187 | ||
188 | si.cb = sizeof(si); | |
189 | si.lpReserved = NULL; | |
190 | si.lpDesktop = NULL; | |
191 | si.lpTitle = NULL; | |
192 | si.dwFlags = STARTF_USESTDHANDLES; | |
193 | si.cbReserved2 = 0; | |
194 | si.lpReserved2 = NULL; | |
195 | si.hStdInput = cmd_from_us; | |
196 | si.hStdOutput = cmd_to_us; | |
197 | si.hStdError = NULL; | |
198 | CreateProcess(NULL, cmd, NULL, NULL, TRUE, | |
199 | CREATE_NO_WINDOW | NORMAL_PRIORITY_CLASS, | |
200 | NULL, NULL, &si, &pi); | |
201 | ||
202 | sfree(cmd); | |
203 | ||
204 | CloseHandle(cmd_from_us); | |
205 | CloseHandle(cmd_to_us); | |
206 | ||
207 | ret->to_cmd_H = us_to_cmd; | |
208 | ret->from_cmd_H = us_from_cmd; | |
209 | ||
210 | ret->from_cmd_h = handle_input_new(ret->from_cmd_H, localproxy_gotdata, | |
211 | ret, 0); | |
212 | ret->to_cmd_h = handle_output_new(ret->to_cmd_H, localproxy_sentdata, | |
213 | ret, 0); | |
214 | ||
215 | /* We are responsible for this and don't need it any more */ | |
216 | sk_addr_free(addr); | |
217 | ||
218 | return (Socket) ret; | |
219 | } |