| 1 | /*\r |
| 2 | * winproxy.c: Windows implementation of platform_new_connection(),\r |
| 3 | * supporting an OpenSSH-like proxy command via the winhandl.c\r |
| 4 | * mechanism.\r |
| 5 | */\r |
| 6 | \r |
| 7 | #include <stdio.h>\r |
| 8 | #include <assert.h>\r |
| 9 | \r |
| 10 | #define DEFINE_PLUG_METHOD_MACROS\r |
| 11 | #include "tree234.h"\r |
| 12 | #include "putty.h"\r |
| 13 | #include "network.h"\r |
| 14 | #include "proxy.h"\r |
| 15 | \r |
| 16 | typedef struct Socket_localproxy_tag *Local_Proxy_Socket;\r |
| 17 | \r |
| 18 | struct Socket_localproxy_tag {\r |
| 19 | const struct socket_function_table *fn;\r |
| 20 | /* the above variable absolutely *must* be the first in this structure */\r |
| 21 | \r |
| 22 | HANDLE to_cmd_H, from_cmd_H;\r |
| 23 | struct handle *to_cmd_h, *from_cmd_h;\r |
| 24 | \r |
| 25 | char *error;\r |
| 26 | \r |
| 27 | Plug plug;\r |
| 28 | \r |
| 29 | void *privptr;\r |
| 30 | };\r |
| 31 | \r |
| 32 | int localproxy_gotdata(struct handle *h, void *data, int len)\r |
| 33 | {\r |
| 34 | Local_Proxy_Socket ps = (Local_Proxy_Socket) handle_get_privdata(h);\r |
| 35 | \r |
| 36 | if (len < 0) {\r |
| 37 | return plug_closing(ps->plug, "Read error from local proxy command",\r |
| 38 | 0, 0);\r |
| 39 | } else if (len == 0) {\r |
| 40 | return plug_closing(ps->plug, NULL, 0, 0);\r |
| 41 | } else {\r |
| 42 | return plug_receive(ps->plug, 1, data, len);\r |
| 43 | }\r |
| 44 | }\r |
| 45 | \r |
| 46 | void localproxy_sentdata(struct handle *h, int new_backlog)\r |
| 47 | {\r |
| 48 | Local_Proxy_Socket ps = (Local_Proxy_Socket) handle_get_privdata(h);\r |
| 49 | \r |
| 50 | plug_sent(ps->plug, new_backlog);\r |
| 51 | }\r |
| 52 | \r |
| 53 | static Plug sk_localproxy_plug (Socket s, Plug p)\r |
| 54 | {\r |
| 55 | Local_Proxy_Socket ps = (Local_Proxy_Socket) s;\r |
| 56 | Plug ret = ps->plug;\r |
| 57 | if (p)\r |
| 58 | ps->plug = p;\r |
| 59 | return ret;\r |
| 60 | }\r |
| 61 | \r |
| 62 | static void sk_localproxy_close (Socket s)\r |
| 63 | {\r |
| 64 | Local_Proxy_Socket ps = (Local_Proxy_Socket) s;\r |
| 65 | \r |
| 66 | handle_free(ps->to_cmd_h);\r |
| 67 | handle_free(ps->from_cmd_h);\r |
| 68 | CloseHandle(ps->to_cmd_H);\r |
| 69 | CloseHandle(ps->from_cmd_H);\r |
| 70 | \r |
| 71 | sfree(ps);\r |
| 72 | }\r |
| 73 | \r |
| 74 | static int sk_localproxy_write (Socket s, const char *data, int len)\r |
| 75 | {\r |
| 76 | Local_Proxy_Socket ps = (Local_Proxy_Socket) s;\r |
| 77 | \r |
| 78 | return handle_write(ps->to_cmd_h, data, len);\r |
| 79 | }\r |
| 80 | \r |
| 81 | static int sk_localproxy_write_oob(Socket s, const char *data, int len)\r |
| 82 | {\r |
| 83 | /*\r |
| 84 | * oob data is treated as inband; nasty, but nothing really\r |
| 85 | * better we can do\r |
| 86 | */\r |
| 87 | return sk_localproxy_write(s, data, len);\r |
| 88 | }\r |
| 89 | \r |
| 90 | static void sk_localproxy_flush(Socket s)\r |
| 91 | {\r |
| 92 | /* Local_Proxy_Socket ps = (Local_Proxy_Socket) s; */\r |
| 93 | /* do nothing */\r |
| 94 | }\r |
| 95 | \r |
| 96 | static void sk_localproxy_set_private_ptr(Socket s, void *ptr)\r |
| 97 | {\r |
| 98 | Local_Proxy_Socket ps = (Local_Proxy_Socket) s;\r |
| 99 | ps->privptr = ptr;\r |
| 100 | }\r |
| 101 | \r |
| 102 | static void *sk_localproxy_get_private_ptr(Socket s)\r |
| 103 | {\r |
| 104 | Local_Proxy_Socket ps = (Local_Proxy_Socket) s;\r |
| 105 | return ps->privptr;\r |
| 106 | }\r |
| 107 | \r |
| 108 | static void sk_localproxy_set_frozen(Socket s, int is_frozen)\r |
| 109 | {\r |
| 110 | Local_Proxy_Socket ps = (Local_Proxy_Socket) s;\r |
| 111 | \r |
| 112 | /*\r |
| 113 | * FIXME\r |
| 114 | */\r |
| 115 | }\r |
| 116 | \r |
| 117 | static const char *sk_localproxy_socket_error(Socket s)\r |
| 118 | {\r |
| 119 | Local_Proxy_Socket ps = (Local_Proxy_Socket) s;\r |
| 120 | return ps->error;\r |
| 121 | }\r |
| 122 | \r |
| 123 | Socket platform_new_connection(SockAddr addr, char *hostname,\r |
| 124 | int port, int privport,\r |
| 125 | int oobinline, int nodelay, int keepalive,\r |
| 126 | Plug plug, const Config *cfg)\r |
| 127 | {\r |
| 128 | char *cmd;\r |
| 129 | \r |
| 130 | static const struct socket_function_table socket_fn_table = {\r |
| 131 | sk_localproxy_plug,\r |
| 132 | sk_localproxy_close,\r |
| 133 | sk_localproxy_write,\r |
| 134 | sk_localproxy_write_oob,\r |
| 135 | sk_localproxy_flush,\r |
| 136 | sk_localproxy_set_private_ptr,\r |
| 137 | sk_localproxy_get_private_ptr,\r |
| 138 | sk_localproxy_set_frozen,\r |
| 139 | sk_localproxy_socket_error\r |
| 140 | };\r |
| 141 | \r |
| 142 | Local_Proxy_Socket ret;\r |
| 143 | HANDLE us_to_cmd, us_from_cmd, cmd_to_us, cmd_from_us;\r |
| 144 | SECURITY_ATTRIBUTES sa;\r |
| 145 | STARTUPINFO si;\r |
| 146 | PROCESS_INFORMATION pi;\r |
| 147 | \r |
| 148 | if (cfg->proxy_type != PROXY_CMD)\r |
| 149 | return NULL;\r |
| 150 | \r |
| 151 | cmd = format_telnet_command(addr, port, cfg);\r |
| 152 | \r |
| 153 | {\r |
| 154 | char *msg = dupprintf("Starting local proxy command: %s", cmd);\r |
| 155 | /* We're allowed to pass NULL here, because we're part of the Windows\r |
| 156 | * front end so we know logevent doesn't expect any data. */\r |
| 157 | logevent(NULL, msg);\r |
| 158 | sfree(msg);\r |
| 159 | }\r |
| 160 | \r |
| 161 | ret = snew(struct Socket_localproxy_tag);\r |
| 162 | ret->fn = &socket_fn_table;\r |
| 163 | ret->plug = plug;\r |
| 164 | ret->error = NULL;\r |
| 165 | \r |
| 166 | /*\r |
| 167 | * Create the pipes to the proxy command, and spawn the proxy\r |
| 168 | * command process.\r |
| 169 | */\r |
| 170 | sa.nLength = sizeof(sa);\r |
| 171 | sa.lpSecurityDescriptor = NULL; /* default */\r |
| 172 | sa.bInheritHandle = TRUE;\r |
| 173 | if (!CreatePipe(&us_from_cmd, &cmd_to_us, &sa, 0)) {\r |
| 174 | ret->error = dupprintf("Unable to create pipes for proxy command");\r |
| 175 | return (Socket)ret;\r |
| 176 | }\r |
| 177 | \r |
| 178 | if (!CreatePipe(&cmd_from_us, &us_to_cmd, &sa, 0)) {\r |
| 179 | CloseHandle(us_from_cmd);\r |
| 180 | CloseHandle(cmd_to_us);\r |
| 181 | ret->error = dupprintf("Unable to create pipes for proxy command");\r |
| 182 | return (Socket)ret;\r |
| 183 | }\r |
| 184 | \r |
| 185 | SetHandleInformation(us_to_cmd, HANDLE_FLAG_INHERIT, 0);\r |
| 186 | SetHandleInformation(us_from_cmd, HANDLE_FLAG_INHERIT, 0);\r |
| 187 | \r |
| 188 | si.cb = sizeof(si);\r |
| 189 | si.lpReserved = NULL;\r |
| 190 | si.lpDesktop = NULL;\r |
| 191 | si.lpTitle = NULL;\r |
| 192 | si.dwFlags = STARTF_USESTDHANDLES;\r |
| 193 | si.cbReserved2 = 0;\r |
| 194 | si.lpReserved2 = NULL;\r |
| 195 | si.hStdInput = cmd_from_us;\r |
| 196 | si.hStdOutput = cmd_to_us;\r |
| 197 | si.hStdError = NULL;\r |
| 198 | CreateProcess(NULL, cmd, NULL, NULL, TRUE,\r |
| 199 | CREATE_NO_WINDOW | NORMAL_PRIORITY_CLASS,\r |
| 200 | NULL, NULL, &si, &pi);\r |
| 201 | \r |
| 202 | CloseHandle(cmd_from_us);\r |
| 203 | CloseHandle(cmd_to_us);\r |
| 204 | \r |
| 205 | ret->to_cmd_H = us_to_cmd;\r |
| 206 | ret->from_cmd_H = us_from_cmd;\r |
| 207 | \r |
| 208 | ret->from_cmd_h = handle_input_new(ret->from_cmd_H, localproxy_gotdata,\r |
| 209 | ret, 0);\r |
| 210 | ret->to_cmd_h = handle_output_new(ret->to_cmd_H, localproxy_sentdata,\r |
| 211 | ret, 0);\r |
| 212 | \r |
| 213 | /* We are responsible for this and don't need it any more */\r |
| 214 | sk_addr_free(addr);\r |
| 215 | \r |
| 216 | return (Socket) ret;\r |
| 217 | }\r |