2 * winproxy.c: Windows implementation of platform_new_connection(),
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3 * supporting an OpenSSH-like proxy command via the winhandl.c
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10 #define DEFINE_PLUG_METHOD_MACROS
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11 #include "tree234.h"
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13 #include "network.h"
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16 typedef struct Socket_localproxy_tag *Local_Proxy_Socket;
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18 struct Socket_localproxy_tag {
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19 const struct socket_function_table *fn;
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20 /* the above variable absolutely *must* be the first in this structure */
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22 HANDLE to_cmd_H, from_cmd_H;
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23 struct handle *to_cmd_h, *from_cmd_h;
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32 int localproxy_gotdata(struct handle *h, void *data, int len)
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34 Local_Proxy_Socket ps = (Local_Proxy_Socket) handle_get_privdata(h);
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37 return plug_closing(ps->plug, "Read error from local proxy command",
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39 } else if (len == 0) {
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40 return plug_closing(ps->plug, NULL, 0, 0);
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42 return plug_receive(ps->plug, 0, data, len);
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46 void localproxy_sentdata(struct handle *h, int new_backlog)
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48 Local_Proxy_Socket ps = (Local_Proxy_Socket) handle_get_privdata(h);
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50 plug_sent(ps->plug, new_backlog);
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53 static Plug sk_localproxy_plug (Socket s, Plug p)
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55 Local_Proxy_Socket ps = (Local_Proxy_Socket) s;
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56 Plug ret = ps->plug;
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62 static void sk_localproxy_close (Socket s)
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64 Local_Proxy_Socket ps = (Local_Proxy_Socket) s;
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66 handle_free(ps->to_cmd_h);
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67 handle_free(ps->from_cmd_h);
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68 CloseHandle(ps->to_cmd_H);
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69 CloseHandle(ps->from_cmd_H);
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74 static int sk_localproxy_write (Socket s, const char *data, int len)
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76 Local_Proxy_Socket ps = (Local_Proxy_Socket) s;
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78 return handle_write(ps->to_cmd_h, data, len);
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81 static int sk_localproxy_write_oob(Socket s, const char *data, int len)
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84 * oob data is treated as inband; nasty, but nothing really
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87 return sk_localproxy_write(s, data, len);
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90 static void sk_localproxy_flush(Socket s)
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92 /* Local_Proxy_Socket ps = (Local_Proxy_Socket) s; */
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96 static void sk_localproxy_set_private_ptr(Socket s, void *ptr)
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98 Local_Proxy_Socket ps = (Local_Proxy_Socket) s;
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102 static void *sk_localproxy_get_private_ptr(Socket s)
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104 Local_Proxy_Socket ps = (Local_Proxy_Socket) s;
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105 return ps->privptr;
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108 static void sk_localproxy_set_frozen(Socket s, int is_frozen)
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110 Local_Proxy_Socket ps = (Local_Proxy_Socket) s;
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117 static const char *sk_localproxy_socket_error(Socket s)
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119 Local_Proxy_Socket ps = (Local_Proxy_Socket) s;
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123 Socket platform_new_connection(SockAddr addr, char *hostname,
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124 int port, int privport,
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125 int oobinline, int nodelay, int keepalive,
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126 Plug plug, const Config *cfg)
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130 static const struct socket_function_table socket_fn_table = {
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131 sk_localproxy_plug,
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132 sk_localproxy_close,
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133 sk_localproxy_write,
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134 sk_localproxy_write_oob,
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135 sk_localproxy_flush,
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136 sk_localproxy_set_private_ptr,
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137 sk_localproxy_get_private_ptr,
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138 sk_localproxy_set_frozen,
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139 sk_localproxy_socket_error
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142 Local_Proxy_Socket ret;
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143 HANDLE us_to_cmd, us_from_cmd, cmd_to_us, cmd_from_us;
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144 SECURITY_ATTRIBUTES sa;
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146 PROCESS_INFORMATION pi;
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148 if (cfg->proxy_type != PROXY_CMD)
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151 cmd = format_telnet_command(addr, port, cfg);
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154 char *msg = dupprintf("Starting local proxy command: %s", cmd);
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155 /* We're allowed to pass NULL here, because we're part of the Windows
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156 * front end so we know logevent doesn't expect any data. */
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157 logevent(NULL, msg);
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161 ret = snew(struct Socket_localproxy_tag);
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162 ret->fn = &socket_fn_table;
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167 * Create the pipes to the proxy command, and spawn the proxy
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170 sa.nLength = sizeof(sa);
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171 sa.lpSecurityDescriptor = NULL; /* default */
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172 sa.bInheritHandle = TRUE;
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173 if (!CreatePipe(&us_from_cmd, &cmd_to_us, &sa, 0)) {
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174 ret->error = dupprintf("Unable to create pipes for proxy command");
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175 return (Socket)ret;
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178 if (!CreatePipe(&cmd_from_us, &us_to_cmd, &sa, 0)) {
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179 CloseHandle(us_from_cmd);
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180 CloseHandle(cmd_to_us);
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181 ret->error = dupprintf("Unable to create pipes for proxy command");
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182 return (Socket)ret;
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185 SetHandleInformation(us_to_cmd, HANDLE_FLAG_INHERIT, 0);
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186 SetHandleInformation(us_from_cmd, HANDLE_FLAG_INHERIT, 0);
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188 si.cb = sizeof(si);
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189 si.lpReserved = NULL;
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190 si.lpDesktop = NULL;
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192 si.dwFlags = STARTF_USESTDHANDLES;
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193 si.cbReserved2 = 0;
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194 si.lpReserved2 = NULL;
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195 si.hStdInput = cmd_from_us;
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196 si.hStdOutput = cmd_to_us;
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197 si.hStdError = NULL;
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198 CreateProcess(NULL, cmd, NULL, NULL, TRUE,
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199 CREATE_NO_WINDOW | NORMAL_PRIORITY_CLASS,
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200 NULL, NULL, &si, &pi);
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204 CloseHandle(cmd_from_us);
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205 CloseHandle(cmd_to_us);
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207 ret->to_cmd_H = us_to_cmd;
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208 ret->from_cmd_H = us_from_cmd;
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210 ret->from_cmd_h = handle_input_new(ret->from_cmd_H, localproxy_gotdata,
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212 ret->to_cmd_h = handle_output_new(ret->to_cmd_H, localproxy_sentdata,
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215 /* We are responsible for this and don't need it any more */
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216 sk_addr_free(addr);
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218 return (Socket) ret;
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