]>
Commit | Line | Data |
---|---|---|
1 | /* | |
2 | * This file is part of the libserialport project. | |
3 | * | |
4 | * Copyright (C) 2013-2014 Martin Ling <martin-libserialport@earth.li> | |
5 | * Copyright (C) 2014 Aurelien Jacobs <aurel@gnuage.org> | |
6 | * | |
7 | * This program is free software: you can redistribute it and/or modify | |
8 | * it under the terms of the GNU Lesser General Public License as | |
9 | * published by the Free Software Foundation, either version 3 of the | |
10 | * License, or (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public License | |
18 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
19 | */ | |
20 | ||
21 | #include "libserialport_internal.h" | |
22 | ||
23 | /* USB path is a string of at most 8 decimal numbers < 128 separated by dots. */ | |
24 | #define MAX_USB_PATH ((8 * 3) + (7 * 1) + 1) | |
25 | ||
26 | static void enumerate_hub(struct sp_port *port, const char *hub_name, | |
27 | const char *parent_path, DEVINST dev_inst); | |
28 | ||
29 | static char *wc_to_utf8(PWCHAR wc_buffer, ULONG wc_bytes) | |
30 | { | |
31 | ULONG wc_length = wc_bytes / sizeof(WCHAR); | |
32 | ULONG utf8_bytes; | |
33 | WCHAR *wc_str = NULL; | |
34 | char *utf8_str = NULL; | |
35 | ||
36 | /* Allocate aligned wide char buffer */ | |
37 | if (!(wc_str = malloc((wc_length + 1) * sizeof(WCHAR)))) | |
38 | goto wc_to_utf8_end; | |
39 | ||
40 | /* Zero-terminate the wide char string. */ | |
41 | memcpy(wc_str, wc_buffer, wc_bytes); | |
42 | wc_str[wc_length] = 0; | |
43 | ||
44 | /* Compute the size of the UTF-8 converted string. */ | |
45 | if (!(utf8_bytes = WideCharToMultiByte(CP_ACP, WC_NO_BEST_FIT_CHARS, wc_str, -1, | |
46 | NULL, 0, NULL, NULL))) | |
47 | goto wc_to_utf8_end; | |
48 | ||
49 | /* Allocate UTF-8 output buffer. */ | |
50 | if (!(utf8_str = malloc(utf8_bytes))) | |
51 | goto wc_to_utf8_end; | |
52 | ||
53 | /* Actually converted to UTF-8. */ | |
54 | if (!WideCharToMultiByte(CP_ACP, WC_NO_BEST_FIT_CHARS, wc_str, -1, | |
55 | utf8_str, utf8_bytes, NULL, NULL)) { | |
56 | free(utf8_str); | |
57 | utf8_str = NULL; | |
58 | goto wc_to_utf8_end; | |
59 | } | |
60 | ||
61 | wc_to_utf8_end: | |
62 | if (wc_str) | |
63 | free(wc_str); | |
64 | ||
65 | return utf8_str; | |
66 | } | |
67 | ||
68 | static char *get_root_hub_name(HANDLE host_controller) | |
69 | { | |
70 | USB_ROOT_HUB_NAME root_hub_name; | |
71 | PUSB_ROOT_HUB_NAME root_hub_name_wc; | |
72 | char *root_hub_name_utf8; | |
73 | ULONG size = 0; | |
74 | ||
75 | /* Compute the size of the root hub name string. */ | |
76 | if (!DeviceIoControl(host_controller, IOCTL_USB_GET_ROOT_HUB_NAME, 0, 0, | |
77 | &root_hub_name, sizeof(root_hub_name), &size, NULL)) | |
78 | return NULL; | |
79 | ||
80 | /* Allocate wide char root hub name string. */ | |
81 | size = root_hub_name.ActualLength; | |
82 | if (!(root_hub_name_wc = malloc(size))) | |
83 | return NULL; | |
84 | ||
85 | /* Actually get the root hub name string. */ | |
86 | if (!DeviceIoControl(host_controller, IOCTL_USB_GET_ROOT_HUB_NAME, | |
87 | NULL, 0, root_hub_name_wc, size, &size, NULL)) { | |
88 | free(root_hub_name_wc); | |
89 | return NULL; | |
90 | } | |
91 | ||
92 | /* Convert the root hub name string to UTF-8. */ | |
93 | root_hub_name_utf8 = wc_to_utf8(root_hub_name_wc->RootHubName, size - offsetof(USB_ROOT_HUB_NAME, RootHubName)); | |
94 | free(root_hub_name_wc); | |
95 | return root_hub_name_utf8; | |
96 | } | |
97 | ||
98 | static char *get_external_hub_name(HANDLE hub, ULONG connection_index) | |
99 | { | |
100 | USB_NODE_CONNECTION_NAME ext_hub_name; | |
101 | PUSB_NODE_CONNECTION_NAME ext_hub_name_wc; | |
102 | char *ext_hub_name_utf8; | |
103 | ULONG size; | |
104 | ||
105 | /* Compute the size of the external hub name string. */ | |
106 | ext_hub_name.ConnectionIndex = connection_index; | |
107 | if (!DeviceIoControl(hub, IOCTL_USB_GET_NODE_CONNECTION_NAME, | |
108 | &ext_hub_name, sizeof(ext_hub_name), | |
109 | &ext_hub_name, sizeof(ext_hub_name), &size, NULL)) | |
110 | return NULL; | |
111 | ||
112 | /* Allocate wide char external hub name string. */ | |
113 | size = ext_hub_name.ActualLength; | |
114 | if (size <= sizeof(ext_hub_name) | |
115 | || !(ext_hub_name_wc = malloc(size))) | |
116 | return NULL; | |
117 | ||
118 | /* Get the name of the external hub attached to the specified port. */ | |
119 | ext_hub_name_wc->ConnectionIndex = connection_index; | |
120 | if (!DeviceIoControl(hub, IOCTL_USB_GET_NODE_CONNECTION_NAME, | |
121 | ext_hub_name_wc, size, | |
122 | ext_hub_name_wc, size, &size, NULL)) { | |
123 | free(ext_hub_name_wc); | |
124 | return NULL; | |
125 | } | |
126 | ||
127 | /* Convert the external hub name string to UTF-8. */ | |
128 | ext_hub_name_utf8 = wc_to_utf8(ext_hub_name_wc->NodeName, size - offsetof(USB_NODE_CONNECTION_NAME, NodeName)); | |
129 | free(ext_hub_name_wc); | |
130 | return ext_hub_name_utf8; | |
131 | } | |
132 | ||
133 | static char *get_string_descriptor(HANDLE hub_device, ULONG connection_index, | |
134 | UCHAR descriptor_index) | |
135 | { | |
136 | char desc_req_buf[sizeof(USB_DESCRIPTOR_REQUEST) + | |
137 | MAXIMUM_USB_STRING_LENGTH] = { 0 }; | |
138 | PUSB_DESCRIPTOR_REQUEST desc_req = (void *)desc_req_buf; | |
139 | PUSB_STRING_DESCRIPTOR desc = (void *)(desc_req + 1); | |
140 | ULONG size = sizeof(desc_req_buf); | |
141 | ||
142 | desc_req->ConnectionIndex = connection_index; | |
143 | desc_req->SetupPacket.wValue = (USB_STRING_DESCRIPTOR_TYPE << 8) | |
144 | | descriptor_index; | |
145 | desc_req->SetupPacket.wIndex = 0; | |
146 | desc_req->SetupPacket.wLength = (USHORT) (size - sizeof(*desc_req)); | |
147 | ||
148 | if (!DeviceIoControl(hub_device, | |
149 | IOCTL_USB_GET_DESCRIPTOR_FROM_NODE_CONNECTION, | |
150 | desc_req, size, desc_req, size, &size, NULL) | |
151 | || size < 2 | |
152 | || desc->bDescriptorType != USB_STRING_DESCRIPTOR_TYPE | |
153 | || desc->bLength != size - sizeof(*desc_req) | |
154 | || desc->bLength % 2) | |
155 | return NULL; | |
156 | ||
157 | return wc_to_utf8(desc->bString, desc->bLength - offsetof(USB_STRING_DESCRIPTOR, bString)); | |
158 | } | |
159 | ||
160 | static void enumerate_hub_ports(struct sp_port *port, HANDLE hub_device, | |
161 | ULONG nb_ports, const char *parent_path, DEVINST dev_inst) | |
162 | { | |
163 | char path[MAX_USB_PATH]; | |
164 | ULONG index = 0; | |
165 | ||
166 | for (index = 1; index <= nb_ports; index++) { | |
167 | PUSB_NODE_CONNECTION_INFORMATION_EX connection_info_ex; | |
168 | ULONG size = sizeof(*connection_info_ex) + (30 * sizeof(USB_PIPE_INFO)); | |
169 | ||
170 | if (!(connection_info_ex = malloc(size))) | |
171 | break; | |
172 | ||
173 | connection_info_ex->ConnectionIndex = index; | |
174 | if (!DeviceIoControl(hub_device, | |
175 | IOCTL_USB_GET_NODE_CONNECTION_INFORMATION_EX, | |
176 | connection_info_ex, size, | |
177 | connection_info_ex, size, &size, NULL)) { | |
178 | /* | |
179 | * Try to get CONNECTION_INFORMATION if | |
180 | * CONNECTION_INFORMATION_EX did not work. | |
181 | */ | |
182 | PUSB_NODE_CONNECTION_INFORMATION connection_info; | |
183 | ||
184 | size = sizeof(*connection_info) + (30 * sizeof(USB_PIPE_INFO)); | |
185 | if (!(connection_info = malloc(size))) { | |
186 | free(connection_info_ex); | |
187 | continue; | |
188 | } | |
189 | connection_info->ConnectionIndex = index; | |
190 | if (!DeviceIoControl(hub_device, | |
191 | IOCTL_USB_GET_NODE_CONNECTION_INFORMATION, | |
192 | connection_info, size, | |
193 | connection_info, size, &size, NULL)) { | |
194 | free(connection_info); | |
195 | free(connection_info_ex); | |
196 | continue; | |
197 | } | |
198 | ||
199 | connection_info_ex->ConnectionIndex = connection_info->ConnectionIndex; | |
200 | connection_info_ex->DeviceDescriptor = connection_info->DeviceDescriptor; | |
201 | connection_info_ex->DeviceIsHub = connection_info->DeviceIsHub; | |
202 | connection_info_ex->DeviceAddress = connection_info->DeviceAddress; | |
203 | free(connection_info); | |
204 | } | |
205 | ||
206 | if (connection_info_ex->DeviceIsHub) { | |
207 | /* Recursively enumerate external hub. */ | |
208 | PCHAR ext_hub_name; | |
209 | if ((ext_hub_name = get_external_hub_name(hub_device, index))) { | |
210 | snprintf(path, sizeof(path), "%s%ld.", | |
211 | parent_path, connection_info_ex->ConnectionIndex); | |
212 | enumerate_hub(port, ext_hub_name, path, dev_inst); | |
213 | } | |
214 | free(connection_info_ex); | |
215 | } else { | |
216 | snprintf(path, sizeof(path), "%s%ld", | |
217 | parent_path, connection_info_ex->ConnectionIndex); | |
218 | ||
219 | /* Check if this device is the one we search for. */ | |
220 | if (strcmp(path, port->usb_path)) { | |
221 | free(connection_info_ex); | |
222 | continue; | |
223 | } | |
224 | ||
225 | /* Finally grab detailed information regarding the device. */ | |
226 | port->usb_address = connection_info_ex->DeviceAddress + 1; | |
227 | port->usb_vid = connection_info_ex->DeviceDescriptor.idVendor; | |
228 | port->usb_pid = connection_info_ex->DeviceDescriptor.idProduct; | |
229 | ||
230 | if (connection_info_ex->DeviceDescriptor.iManufacturer) | |
231 | port->usb_manufacturer = get_string_descriptor(hub_device, index, | |
232 | connection_info_ex->DeviceDescriptor.iManufacturer); | |
233 | if (connection_info_ex->DeviceDescriptor.iProduct) | |
234 | port->usb_product = get_string_descriptor(hub_device, index, | |
235 | connection_info_ex->DeviceDescriptor.iProduct); | |
236 | if (connection_info_ex->DeviceDescriptor.iSerialNumber) { | |
237 | port->usb_serial = get_string_descriptor(hub_device, index, | |
238 | connection_info_ex->DeviceDescriptor.iSerialNumber); | |
239 | if (port->usb_serial == NULL) { | |
240 | //composite device, get the parent's serial number | |
241 | char device_id[MAX_DEVICE_ID_LEN]; | |
242 | if (CM_Get_Parent(&dev_inst, dev_inst, 0) == CR_SUCCESS) { | |
243 | if (CM_Get_Device_IDA(dev_inst, device_id, sizeof(device_id), 0) == CR_SUCCESS) | |
244 | port->usb_serial = strdup(strrchr(device_id, '\\')+1); | |
245 | } | |
246 | } | |
247 | } | |
248 | ||
249 | free(connection_info_ex); | |
250 | break; | |
251 | } | |
252 | } | |
253 | } | |
254 | ||
255 | static void enumerate_hub(struct sp_port *port, const char *hub_name, | |
256 | const char *parent_path, DEVINST dev_inst) | |
257 | { | |
258 | USB_NODE_INFORMATION hub_info; | |
259 | HANDLE hub_device; | |
260 | ULONG size = sizeof(hub_info); | |
261 | char *device_name; | |
262 | ||
263 | /* Open the hub with its full name. */ | |
264 | if (!(device_name = malloc(strlen("\\\\.\\") + strlen(hub_name) + 1))) | |
265 | return; | |
266 | strcpy(device_name, "\\\\.\\"); | |
267 | strcat(device_name, hub_name); | |
268 | hub_device = CreateFileA(device_name, GENERIC_WRITE, FILE_SHARE_WRITE, | |
269 | NULL, OPEN_EXISTING, 0, NULL); | |
270 | free(device_name); | |
271 | if (hub_device == INVALID_HANDLE_VALUE) | |
272 | return; | |
273 | ||
274 | /* Get the number of ports of the hub. */ | |
275 | if (DeviceIoControl(hub_device, IOCTL_USB_GET_NODE_INFORMATION, | |
276 | &hub_info, size, &hub_info, size, &size, NULL)) | |
277 | /* Enumerate the ports of the hub. */ | |
278 | enumerate_hub_ports(port, hub_device, | |
279 | hub_info.u.HubInformation.HubDescriptor.bNumberOfPorts, parent_path, dev_inst); | |
280 | ||
281 | CloseHandle(hub_device); | |
282 | } | |
283 | ||
284 | static void enumerate_host_controller(struct sp_port *port, | |
285 | HANDLE host_controller_device, | |
286 | DEVINST dev_inst) | |
287 | { | |
288 | char *root_hub_name; | |
289 | ||
290 | if ((root_hub_name = get_root_hub_name(host_controller_device))) { | |
291 | enumerate_hub(port, root_hub_name, "", dev_inst); | |
292 | free(root_hub_name); | |
293 | } | |
294 | } | |
295 | ||
296 | static void get_usb_details(struct sp_port *port, DEVINST dev_inst_match) | |
297 | { | |
298 | HDEVINFO device_info; | |
299 | SP_DEVINFO_DATA device_info_data; | |
300 | ULONG i, size = 0; | |
301 | ||
302 | device_info = SetupDiGetClassDevs(&GUID_CLASS_USB_HOST_CONTROLLER, NULL, NULL, | |
303 | DIGCF_PRESENT | DIGCF_DEVICEINTERFACE); | |
304 | device_info_data.cbSize = sizeof(device_info_data); | |
305 | ||
306 | for (i = 0; SetupDiEnumDeviceInfo(device_info, i, &device_info_data); i++) { | |
307 | SP_DEVICE_INTERFACE_DATA device_interface_data; | |
308 | PSP_DEVICE_INTERFACE_DETAIL_DATA device_detail_data; | |
309 | DEVINST dev_inst = dev_inst_match; | |
310 | HANDLE host_controller_device; | |
311 | ||
312 | device_interface_data.cbSize = sizeof(device_interface_data); | |
313 | if (!SetupDiEnumDeviceInterfaces(device_info, 0, | |
314 | &GUID_CLASS_USB_HOST_CONTROLLER, | |
315 | i, &device_interface_data)) | |
316 | continue; | |
317 | ||
318 | if (!SetupDiGetDeviceInterfaceDetail(device_info,&device_interface_data, | |
319 | NULL, 0, &size, NULL) | |
320 | && GetLastError() != ERROR_INSUFFICIENT_BUFFER) | |
321 | continue; | |
322 | ||
323 | if (!(device_detail_data = malloc(size))) | |
324 | continue; | |
325 | device_detail_data->cbSize = sizeof(*device_detail_data); | |
326 | if (!SetupDiGetDeviceInterfaceDetail(device_info,&device_interface_data, | |
327 | device_detail_data, size, &size, | |
328 | NULL)) { | |
329 | free(device_detail_data); | |
330 | continue; | |
331 | } | |
332 | ||
333 | while (CM_Get_Parent(&dev_inst, dev_inst, 0) == CR_SUCCESS | |
334 | && dev_inst != device_info_data.DevInst) { } | |
335 | if (dev_inst != device_info_data.DevInst) { | |
336 | free(device_detail_data); | |
337 | continue; | |
338 | } | |
339 | ||
340 | port->usb_bus = i + 1; | |
341 | ||
342 | host_controller_device = CreateFile(device_detail_data->DevicePath, | |
343 | GENERIC_WRITE, FILE_SHARE_WRITE, | |
344 | NULL, OPEN_EXISTING, 0, NULL); | |
345 | if (host_controller_device != INVALID_HANDLE_VALUE) { | |
346 | enumerate_host_controller(port, host_controller_device, dev_inst_match); | |
347 | CloseHandle(host_controller_device); | |
348 | } | |
349 | free(device_detail_data); | |
350 | } | |
351 | ||
352 | SetupDiDestroyDeviceInfoList(device_info); | |
353 | return; | |
354 | } | |
355 | ||
356 | SP_PRIV enum sp_return get_port_details(struct sp_port *port) | |
357 | { | |
358 | /* | |
359 | * Description limited to 127 char, anything longer | |
360 | * would not be user friendly anyway. | |
361 | */ | |
362 | char description[128]; | |
363 | SP_DEVINFO_DATA device_info_data = { .cbSize = sizeof(device_info_data) }; | |
364 | HDEVINFO device_info; | |
365 | int i; | |
366 | ||
367 | device_info = SetupDiGetClassDevs(NULL, 0, 0, | |
368 | DIGCF_PRESENT | DIGCF_ALLCLASSES); | |
369 | if (device_info == INVALID_HANDLE_VALUE) | |
370 | RETURN_FAIL("SetupDiGetClassDevs() failed"); | |
371 | ||
372 | for (i = 0; SetupDiEnumDeviceInfo(device_info, i, &device_info_data); i++) { | |
373 | HKEY device_key; | |
374 | DEVINST dev_inst; | |
375 | char value[8], class[16]; | |
376 | DWORD size, type; | |
377 | CONFIGRET cr; | |
378 | ||
379 | /* Check if this is the device we are looking for. */ | |
380 | device_key = SetupDiOpenDevRegKey(device_info, &device_info_data, | |
381 | DICS_FLAG_GLOBAL, 0, | |
382 | DIREG_DEV, KEY_QUERY_VALUE); | |
383 | if (device_key == INVALID_HANDLE_VALUE) | |
384 | continue; | |
385 | size = sizeof(value); | |
386 | if (RegQueryValueExA(device_key, "PortName", NULL, &type, (LPBYTE)value, | |
387 | &size) != ERROR_SUCCESS || type != REG_SZ) { | |
388 | RegCloseKey(device_key); | |
389 | continue; | |
390 | } | |
391 | RegCloseKey(device_key); | |
392 | value[sizeof(value) - 1] = 0; | |
393 | if (strcmp(value, port->name)) | |
394 | continue; | |
395 | ||
396 | /* Check port transport type. */ | |
397 | dev_inst = device_info_data.DevInst; | |
398 | size = sizeof(class); | |
399 | cr = CR_FAILURE; | |
400 | while (CM_Get_Parent(&dev_inst, dev_inst, 0) == CR_SUCCESS && | |
401 | (cr = CM_Get_DevNode_Registry_PropertyA(dev_inst, | |
402 | CM_DRP_CLASS, 0, class, &size, 0)) != CR_SUCCESS) { } | |
403 | if (cr == CR_SUCCESS) { | |
404 | if (!strcmp(class, "USB")) | |
405 | port->transport = SP_TRANSPORT_USB; | |
406 | } | |
407 | ||
408 | /* Get port description (friendly name). */ | |
409 | dev_inst = device_info_data.DevInst; | |
410 | size = sizeof(description); | |
411 | while ((cr = CM_Get_DevNode_Registry_PropertyA(dev_inst, | |
412 | CM_DRP_FRIENDLYNAME, 0, description, &size, 0)) != CR_SUCCESS | |
413 | && CM_Get_Parent(&dev_inst, dev_inst, 0) == CR_SUCCESS) { } | |
414 | if (cr == CR_SUCCESS) | |
415 | port->description = strdup(description); | |
416 | ||
417 | /* Get more informations for USB connected ports. */ | |
418 | if (port->transport == SP_TRANSPORT_USB) { | |
419 | char usb_path[MAX_USB_PATH] = "", tmp[MAX_USB_PATH]; | |
420 | char device_id[MAX_DEVICE_ID_LEN]; | |
421 | ||
422 | /* Recurse over parents to build the USB device path. */ | |
423 | dev_inst = device_info_data.DevInst; | |
424 | do { | |
425 | /* Verify that this layer of the tree is USB related. */ | |
426 | if (CM_Get_Device_IDA(dev_inst, device_id, | |
427 | sizeof(device_id), 0) != CR_SUCCESS | |
428 | || strncmp(device_id, "USB\\", 4)) | |
429 | continue; | |
430 | ||
431 | /* Discard one layer for composite devices. */ | |
432 | char compat_ids[512], *p = compat_ids; | |
433 | size = sizeof(compat_ids); | |
434 | if (CM_Get_DevNode_Registry_PropertyA(dev_inst, | |
435 | CM_DRP_COMPATIBLEIDS, 0, | |
436 | &compat_ids, | |
437 | &size, 0) == CR_SUCCESS) { | |
438 | while (*p) { | |
439 | if (!strncmp(p, "USB\\COMPOSITE", 13)) | |
440 | break; | |
441 | p += strlen(p) + 1; | |
442 | } | |
443 | if (*p) | |
444 | continue; | |
445 | } | |
446 | ||
447 | /* Stop the recursion when reaching the USB root. */ | |
448 | if (!strncmp(device_id, "USB\\ROOT", 8)) | |
449 | break; | |
450 | ||
451 | /* Prepend the address of current USB layer to the USB path. */ | |
452 | DWORD address; | |
453 | size = sizeof(address); | |
454 | if (CM_Get_DevNode_Registry_PropertyA(dev_inst, CM_DRP_ADDRESS, | |
455 | 0, &address, &size, 0) == CR_SUCCESS) { | |
456 | strcpy(tmp, usb_path); | |
457 | snprintf(usb_path, sizeof(usb_path), "%d%s%s", | |
458 | (int)address, *tmp ? "." : "", tmp); | |
459 | } | |
460 | } while (CM_Get_Parent(&dev_inst, dev_inst, 0) == CR_SUCCESS); | |
461 | ||
462 | port->usb_path = strdup(usb_path); | |
463 | ||
464 | /* Wake up the USB device to be able to read string descriptor. */ | |
465 | char *escaped_port_name; | |
466 | HANDLE handle; | |
467 | if (!(escaped_port_name = malloc(strlen(port->name) + 5))) | |
468 | RETURN_ERROR(SP_ERR_MEM, "Escaped port name malloc failed"); | |
469 | sprintf(escaped_port_name, "\\\\.\\%s", port->name); | |
470 | handle = CreateFileA(escaped_port_name, GENERIC_READ, 0, 0, | |
471 | OPEN_EXISTING, | |
472 | FILE_ATTRIBUTE_NORMAL|FILE_FLAG_OVERLAPPED, 0); | |
473 | free(escaped_port_name); | |
474 | CloseHandle(handle); | |
475 | ||
476 | /* Retrieve USB device details from the device descriptor. */ | |
477 | get_usb_details(port, device_info_data.DevInst); | |
478 | } | |
479 | break; | |
480 | } | |
481 | ||
482 | SetupDiDestroyDeviceInfoList(device_info); | |
483 | ||
484 | RETURN_OK(); | |
485 | } | |
486 | ||
487 | SP_PRIV enum sp_return list_ports(struct sp_port ***list) | |
488 | { | |
489 | HKEY key; | |
490 | TCHAR *value, *data; | |
491 | DWORD max_value_len, max_data_size, max_data_len; | |
492 | DWORD value_len, data_size, data_len; | |
493 | DWORD type, index = 0; | |
494 | LSTATUS result; | |
495 | char *name; | |
496 | int name_len; | |
497 | int ret = SP_OK; | |
498 | ||
499 | DEBUG("Opening registry key"); | |
500 | if ((result = RegOpenKeyEx(HKEY_LOCAL_MACHINE, _T("HARDWARE\\DEVICEMAP\\SERIALCOMM"), | |
501 | 0, KEY_QUERY_VALUE, &key)) != ERROR_SUCCESS) { | |
502 | /* It's possible for this key to not exist if there are no serial ports | |
503 | * at all. In that case we're done. Return a failure for any other error. */ | |
504 | if (result != ERROR_FILE_NOT_FOUND) { | |
505 | SetLastError(result); | |
506 | SET_FAIL(ret, "RegOpenKeyEx() failed"); | |
507 | } | |
508 | goto out_done; | |
509 | } | |
510 | DEBUG("Querying registry key value and data sizes"); | |
511 | if ((result = RegQueryInfoKey(key, NULL, NULL, NULL, NULL, NULL, NULL, NULL, | |
512 | &max_value_len, &max_data_size, NULL, NULL)) != ERROR_SUCCESS) { | |
513 | SetLastError(result); | |
514 | SET_FAIL(ret, "RegQueryInfoKey() failed"); | |
515 | goto out_close; | |
516 | } | |
517 | max_data_len = max_data_size / sizeof(TCHAR); | |
518 | if (!(value = malloc((max_value_len + 1) * sizeof(TCHAR)))) { | |
519 | SET_ERROR(ret, SP_ERR_MEM, "Registry value malloc failed"); | |
520 | goto out_close; | |
521 | } | |
522 | if (!(data = malloc((max_data_len + 1) * sizeof(TCHAR)))) { | |
523 | SET_ERROR(ret, SP_ERR_MEM, "Registry data malloc failed"); | |
524 | goto out_free_value; | |
525 | } | |
526 | DEBUG("Iterating over values"); | |
527 | while ( | |
528 | value_len = max_value_len + 1, | |
529 | data_size = max_data_size, | |
530 | RegEnumValue(key, index, value, &value_len, | |
531 | NULL, &type, (LPBYTE)data, &data_size) == ERROR_SUCCESS) | |
532 | { | |
533 | if (type == REG_SZ) { | |
534 | data_len = data_size / sizeof(TCHAR); | |
535 | data[data_len] = '\0'; | |
536 | #ifdef UNICODE | |
537 | name_len = WideCharToMultiByte(CP_ACP, 0, data, -1, NULL, 0, NULL, NULL); | |
538 | #else | |
539 | name_len = data_len + 1; | |
540 | #endif | |
541 | if (!(name = malloc(name_len))) { | |
542 | SET_ERROR(ret, SP_ERR_MEM, "Registry port name malloc failed"); | |
543 | goto out; | |
544 | } | |
545 | #ifdef UNICODE | |
546 | WideCharToMultiByte(CP_ACP, 0, data, -1, name, name_len, NULL, NULL); | |
547 | #else | |
548 | strcpy(name, data); | |
549 | #endif | |
550 | DEBUG_FMT("Found port %s", name); | |
551 | if (!(*list = list_append(*list, name))) { | |
552 | SET_ERROR(ret, SP_ERR_MEM, "List append failed"); | |
553 | free(name); | |
554 | goto out; | |
555 | } | |
556 | free(name); | |
557 | } | |
558 | index++; | |
559 | } | |
560 | out: | |
561 | free(data); | |
562 | out_free_value: | |
563 | free(value); | |
564 | out_close: | |
565 | RegCloseKey(key); | |
566 | out_done: | |
567 | ||
568 | return ret; | |
569 | } |