2 * Windows support module which deals with being a named-pipe client.
8 #define DEFINE_PLUG_METHOD_MACROS
15 #if !defined NO_SECURITY
19 Socket make_handle_socket(HANDLE send_H, HANDLE recv_H, Plug plug,
22 Socket new_named_pipe_client(const char *pipename, Plug plug)
25 PSID usersid, pipeowner;
26 PSECURITY_DESCRIPTOR psd;
30 assert(strncmp(pipename, "\\\\.\\pipe\\", 9) == 0);
31 assert(strchr(pipename + 9, '\\') == NULL);
34 pipehandle = CreateFile(pipename, GENERIC_READ | GENERIC_WRITE,
35 0, NULL, OPEN_EXISTING,
36 FILE_FLAG_OVERLAPPED, NULL);
38 if (pipehandle != INVALID_HANDLE_VALUE)
41 if (GetLastError() != ERROR_PIPE_BUSY) {
42 err = dupprintf("Unable to open named pipe '%s': %s",
43 pipename, win_strerror(GetLastError()));
44 ret = new_error_socket(err, plug);
50 * If we got ERROR_PIPE_BUSY, wait for the server to
51 * create a new pipe instance. (Since the server is
52 * expected to be winnps.c, which will do that immediately
53 * after a previous connection is accepted, that shouldn't
54 * take excessively long.)
56 if (!WaitNamedPipe(pipename, NMPWAIT_USE_DEFAULT_WAIT)) {
57 err = dupprintf("Error waiting for named pipe '%s': %s",
58 pipename, win_strerror(GetLastError()));
59 ret = new_error_socket(err, plug);
65 if ((usersid = get_user_sid()) == NULL) {
66 CloseHandle(pipehandle);
67 err = dupprintf("Unable to get user SID");
68 ret = new_error_socket(err, plug);
73 if (p_GetSecurityInfo(pipehandle, SE_KERNEL_OBJECT,
74 OWNER_SECURITY_INFORMATION,
75 &pipeowner, NULL, NULL, NULL,
76 &psd) != ERROR_SUCCESS) {
77 err = dupprintf("Unable to get named pipe security information: %s",
78 win_strerror(GetLastError()));
79 ret = new_error_socket(err, plug);
81 CloseHandle(pipehandle);
86 if (!EqualSid(pipeowner, usersid)) {
87 err = dupprintf("Owner of named pipe '%s' is not us", pipename);
88 ret = new_error_socket(err, plug);
90 CloseHandle(pipehandle);
99 return make_handle_socket(pipehandle, pipehandle, plug, TRUE);
102 #endif /* !defined NO_SECURITY */