+/* TCGETX/TCSETX is not available everywhere. */
+#if defined(TCGETX) && defined(TCSETX) && defined(HAVE_TERMIOX)
+#define USE_TERMIOX
+#endif
+#endif
+
+/* TIOCINQ/TIOCOUTQ is not available everywhere. */
+#if !defined(TIOCINQ) && defined(FIONREAD)
+#define TIOCINQ FIONREAD
+#endif
+#if !defined(TIOCOUTQ) && defined(FIONWRITE)
+#define TIOCOUTQ FIONWRITE
+#endif
+
+/* Non-standard baudrates are not available everywhere. */
+#if defined(HAVE_TERMIOS_SPEED) || defined(HAVE_TERMIOS2_SPEED)
+#define USE_TERMIOS_SPEED
+#endif
+
+#include "libserialport.h"
+
+struct sp_port {
+ char *name;
+ char *description;
+ enum sp_transport transport;
+ int usb_bus;
+ int usb_address;
+ int usb_vid;
+ int usb_pid;
+ char *usb_manufacturer;
+ char *usb_product;
+ char *usb_serial;
+ char *bluetooth_address;
+#ifdef _WIN32
+ char *usb_path;
+ HANDLE hdl;
+ COMMTIMEOUTS timeouts;
+ OVERLAPPED write_ovl;
+ OVERLAPPED read_ovl;
+ OVERLAPPED wait_ovl;
+ DWORD events;
+ BYTE pending_byte;
+ BOOL writing;
+#else
+ int fd;
+#endif
+};
+
+struct sp_port_config {
+ int baudrate;
+ int bits;
+ enum sp_parity parity;
+ int stopbits;
+ enum sp_rts rts;
+ enum sp_cts cts;
+ enum sp_dtr dtr;
+ enum sp_dsr dsr;
+ enum sp_xonxoff xon_xoff;
+};
+
+struct port_data {
+#ifdef _WIN32
+ DCB dcb;
+#else
+ struct termios term;
+ int controlbits;
+ int termiox_supported;
+ int rts_flow;
+ int cts_flow;
+ int dtr_flow;
+ int dsr_flow;
+#endif
+};
+
+#ifdef _WIN32
+typedef HANDLE event_handle;
+#else
+typedef int event_handle;
+#endif
+
+/* Standard baud rates. */
+#ifdef _WIN32
+#define BAUD_TYPE DWORD
+#define BAUD(n) {CBR_##n, n}
+#else
+#define BAUD_TYPE speed_t
+#define BAUD(n) {B##n, n}
+#endif
+
+struct std_baudrate {
+ BAUD_TYPE index;
+ int value;
+};
+
+const struct std_baudrate std_baudrates[] = {
+#ifdef _WIN32
+ /*
+ * The baudrates 50/75/134/150/200/1800/230400/460800 do not seem to
+ * have documented CBR_* macros.
+ */
+ BAUD(110), BAUD(300), BAUD(600), BAUD(1200), BAUD(2400), BAUD(4800),
+ BAUD(9600), BAUD(14400), BAUD(19200), BAUD(38400), BAUD(57600),
+ BAUD(115200), BAUD(128000), BAUD(256000),
+#else
+ BAUD(50), BAUD(75), BAUD(110), BAUD(134), BAUD(150), BAUD(200),
+ BAUD(300), BAUD(600), BAUD(1200), BAUD(1800), BAUD(2400), BAUD(4800),
+ BAUD(9600), BAUD(19200), BAUD(38400), BAUD(57600), BAUD(115200),
+ BAUD(230400),
+#if !defined(__APPLE__) && !defined(__OpenBSD__)
+ BAUD(460800),
+#endif
+#endif
+};
+
+void (*sp_debug_handler)(const char *format, ...) = sp_default_debug_handler;
+
+#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
+#define NUM_STD_BAUDRATES ARRAY_SIZE(std_baudrates)
+
+/* Debug output macros. */
+#define DEBUG(fmt, ...) do { if (sp_debug_handler) sp_debug_handler(fmt ".\n", ##__VA_ARGS__); } while (0)
+#define DEBUG_ERROR(err, fmt, ...) DEBUG("%s returning " #err ": " fmt, __func__, ##__VA_ARGS__)
+#define DEBUG_FAIL(fmt, ...) do { \
+ char *errmsg = sp_last_error_message(); \
+ DEBUG("%s returning SP_ERR_FAIL: "fmt": %s", __func__,##__VA_ARGS__,errmsg); \
+ sp_free_error_message(errmsg); \
+} while (0);
+#define RETURN() do { DEBUG("%s returning", __func__); return; } while(0)
+#define RETURN_CODE(x) do { DEBUG("%s returning " #x, __func__); return x; } while (0)
+#define RETURN_CODEVAL(x) do { \
+ switch (x) { \
+ case SP_OK: RETURN_CODE(SP_OK); \
+ case SP_ERR_ARG: RETURN_CODE(SP_ERR_ARG); \
+ case SP_ERR_FAIL: RETURN_CODE(SP_ERR_FAIL); \
+ case SP_ERR_MEM: RETURN_CODE(SP_ERR_MEM); \
+ case SP_ERR_SUPP: RETURN_CODE(SP_ERR_SUPP); \
+ } \
+} while (0)
+#define RETURN_OK() RETURN_CODE(SP_OK);
+#define RETURN_ERROR(err, ...) do { DEBUG_ERROR(err, __VA_ARGS__); return err; } while (0)
+#define RETURN_FAIL(...) do { DEBUG_FAIL(__VA_ARGS__); return SP_ERR_FAIL; } while (0)
+#define RETURN_VALUE(fmt, x) do { \
+ typeof(x) _x = x; \
+ DEBUG("%s returning " fmt, __func__, _x); \
+ return _x; \
+} while (0)
+#define SET_ERROR(val, err, msg) do { DEBUG_ERROR(err, msg); val = err; } while (0)
+#define SET_FAIL(val, msg) do { DEBUG_FAIL(msg); val = SP_ERR_FAIL; } while (0)
+#define TRACE(fmt, ...) DEBUG("%s(" fmt ") called", __func__, ##__VA_ARGS__)
+
+#define TRY(x) do { int ret = x; if (ret != SP_OK) RETURN_CODEVAL(ret); } while (0)
+
+/* Helper functions. */
+static enum sp_return get_config(struct sp_port *port, struct port_data *data,
+ struct sp_port_config *config);
+static enum sp_return set_config(struct sp_port *port, struct port_data *data,
+ const struct sp_port_config *config);
+
+#ifdef _WIN32
+
+/* USB path is a string of at most 8 decimal numbers < 128 separated by dots */
+#define MAX_USB_PATH (8*3 + 7*1 + 1)
+
+static char *wc_to_utf8(PWCHAR wc_buffer, ULONG size)
+{
+ WCHAR wc_str[size/sizeof(WCHAR)+1];
+ char *utf8_str;
+
+ /* zero terminate the wide char string */
+ memcpy(wc_str, wc_buffer, size);
+ wc_str[sizeof(wc_str)-1] = 0;
+
+ /* compute the size of the utf8 converted string */
+ if (!(size = WideCharToMultiByte(CP_ACP, WC_NO_BEST_FIT_CHARS, wc_str, -1,
+ NULL, 0, NULL, NULL)))
+ return NULL;
+
+ /* allocate utf8 output buffer */
+ if (!(utf8_str = malloc(size)))
+ return NULL;
+
+ /* actually converted to utf8 */
+ if (!WideCharToMultiByte(CP_ACP, WC_NO_BEST_FIT_CHARS, wc_str, -1,
+ utf8_str, size, NULL, NULL)) {
+ free(utf8_str);
+ return NULL;
+ }
+
+ return utf8_str;
+}
+
+static char *get_root_hub_name(HANDLE host_controller)
+{
+ USB_ROOT_HUB_NAME root_hub_name;
+ PUSB_ROOT_HUB_NAME root_hub_name_wc;
+ char *root_hub_name_utf8;
+ ULONG size = 0;
+
+ /* compute the size of the root hub name string */
+ if (!DeviceIoControl(host_controller, IOCTL_USB_GET_ROOT_HUB_NAME, 0, 0,
+ &root_hub_name, sizeof(root_hub_name), &size, NULL))
+ return NULL;
+
+ /* allocate wide char root hub name string */
+ size = root_hub_name.ActualLength;
+ if (!(root_hub_name_wc = malloc(size)))
+ return NULL;
+
+ /* actually get the root hub name string */
+ if (!DeviceIoControl(host_controller, IOCTL_USB_GET_ROOT_HUB_NAME,
+ NULL, 0, root_hub_name_wc, size, &size, NULL)) {
+ free(root_hub_name_wc);
+ return NULL;
+ }
+
+ /* convert the root hub name string to utf8 */
+ root_hub_name_utf8 = wc_to_utf8(root_hub_name_wc->RootHubName, size);
+ free(root_hub_name_wc);
+ return root_hub_name_utf8;
+}
+
+static char *get_external_hub_name(HANDLE hub, ULONG connection_index)
+{
+ USB_NODE_CONNECTION_NAME ext_hub_name;
+ PUSB_NODE_CONNECTION_NAME ext_hub_name_wc;
+ char *ext_hub_name_utf8;
+ ULONG size;
+
+ /* compute the size of the external hub name string */
+ ext_hub_name.ConnectionIndex = connection_index;
+ if (!DeviceIoControl(hub, IOCTL_USB_GET_NODE_CONNECTION_NAME,
+ &ext_hub_name, sizeof(ext_hub_name),
+ &ext_hub_name, sizeof(ext_hub_name), &size, NULL))
+ return NULL;
+
+ /* allocate wide char external hub name string */
+ size = ext_hub_name.ActualLength;
+ if (size <= sizeof(ext_hub_name)
+ || !(ext_hub_name_wc = malloc(size)))
+ return NULL;
+
+ /* get the name of the external hub attached to the specified port */
+ ext_hub_name_wc->ConnectionIndex = connection_index;
+ if (!DeviceIoControl(hub, IOCTL_USB_GET_NODE_CONNECTION_NAME,
+ ext_hub_name_wc, size,
+ ext_hub_name_wc, size, &size, NULL)) {
+ free(ext_hub_name_wc);
+ return NULL;
+ }
+
+ /* convert the external hub name string to utf8 */
+ ext_hub_name_utf8 = wc_to_utf8(ext_hub_name_wc->NodeName, size);
+ free(ext_hub_name_wc);
+ return ext_hub_name_utf8;
+}
+
+static char *get_string_descriptor(HANDLE hub_device, ULONG connection_index,
+ UCHAR descriptor_index)
+{
+ char desc_req_buf[sizeof(USB_DESCRIPTOR_REQUEST) +
+ MAXIMUM_USB_STRING_LENGTH] = { 0 };
+ PUSB_DESCRIPTOR_REQUEST desc_req = (void *) desc_req_buf;
+ PUSB_STRING_DESCRIPTOR desc = (void *) (desc_req + 1);
+ ULONG size = sizeof(desc_req_buf);
+
+ desc_req->ConnectionIndex = connection_index;
+ desc_req->SetupPacket.wValue = (USB_STRING_DESCRIPTOR_TYPE << 8)
+ | descriptor_index;
+ desc_req->SetupPacket.wIndex = 0;
+ desc_req->SetupPacket.wLength = size - sizeof(*desc_req);
+
+ if (!DeviceIoControl(hub_device,
+ IOCTL_USB_GET_DESCRIPTOR_FROM_NODE_CONNECTION,
+ desc_req, size, desc_req, size, &size, NULL)
+ || size < 2
+ || desc->bDescriptorType != USB_STRING_DESCRIPTOR_TYPE
+ || desc->bLength != size - sizeof(*desc_req)
+ || desc->bLength % 2)
+ return NULL;
+
+ return wc_to_utf8(desc->bString, desc->bLength);
+}
+
+static void enumerate_hub(struct sp_port *port, char *hub_name,
+ char *parent_path);
+
+static void enumerate_hub_ports(struct sp_port *port, HANDLE hub_device,
+ ULONG nb_ports, char *parent_path)
+{
+ char path[MAX_USB_PATH];
+ ULONG index = 0;
+
+ for (index = 1; index <= nb_ports; index++) {
+ PUSB_NODE_CONNECTION_INFORMATION_EX connection_info_ex;
+ ULONG size = sizeof(*connection_info_ex) + 30*sizeof(USB_PIPE_INFO);
+
+ if (!(connection_info_ex = malloc(size)))
+ break;
+
+ connection_info_ex->ConnectionIndex = index;
+ if (!DeviceIoControl(hub_device,
+ IOCTL_USB_GET_NODE_CONNECTION_INFORMATION_EX,
+ connection_info_ex, size,
+ connection_info_ex, size, &size, NULL)) {
+ /* try to get CONNECTION_INFORMATION if CONNECTION_INFORMATION_EX
+ did not work */
+ PUSB_NODE_CONNECTION_INFORMATION connection_info;
+
+ size = sizeof(*connection_info) + 30*sizeof(USB_PIPE_INFO);
+ if (!(connection_info = malloc(size))) {
+ free(connection_info_ex);
+ continue;
+ }
+ connection_info->ConnectionIndex = index;
+ if (!DeviceIoControl(hub_device,
+ IOCTL_USB_GET_NODE_CONNECTION_INFORMATION,
+ connection_info, size,
+ connection_info, size, &size, NULL)) {
+ free(connection_info);
+ free(connection_info_ex);
+ continue;
+ }
+
+ connection_info_ex->ConnectionIndex = connection_info->ConnectionIndex;
+ connection_info_ex->DeviceDescriptor = connection_info->DeviceDescriptor;
+ connection_info_ex->DeviceIsHub = connection_info->DeviceIsHub;
+ connection_info_ex->DeviceAddress = connection_info->DeviceAddress;
+ free(connection_info);
+ }
+
+ if (connection_info_ex->DeviceIsHub) {
+ /* recursively enumerate external hub */
+ PCHAR ext_hub_name;
+ if ((ext_hub_name = get_external_hub_name(hub_device, index))) {
+ snprintf(path, sizeof(path), "%s%d.",
+ parent_path, connection_info_ex->ConnectionIndex);
+ enumerate_hub(port, ext_hub_name, path);
+ }
+ free(connection_info_ex);
+ } else {
+ snprintf(path, sizeof(path), "%s%d",
+ parent_path, connection_info_ex->ConnectionIndex);
+
+ /* check if this device is the one we search for */
+ if (strcmp(path, port->usb_path)) {
+ free(connection_info_ex);
+ continue;
+ }
+
+ /* finally grab detailed informations regarding the device */
+ port->usb_address = connection_info_ex->DeviceAddress + 1;
+ port->usb_vid = connection_info_ex->DeviceDescriptor.idVendor;
+ port->usb_pid = connection_info_ex->DeviceDescriptor.idProduct;
+
+ if (connection_info_ex->DeviceDescriptor.iManufacturer)
+ port->usb_manufacturer = get_string_descriptor(hub_device,index,
+ connection_info_ex->DeviceDescriptor.iManufacturer);
+ if (connection_info_ex->DeviceDescriptor.iProduct)
+ port->usb_product = get_string_descriptor(hub_device, index,
+ connection_info_ex->DeviceDescriptor.iProduct);
+ if (connection_info_ex->DeviceDescriptor.iSerialNumber)
+ port->usb_serial = get_string_descriptor(hub_device, index,
+ connection_info_ex->DeviceDescriptor.iSerialNumber);
+
+ free(connection_info_ex);
+ break;
+ }
+ }
+}
+
+static void enumerate_hub(struct sp_port *port, char *hub_name,
+ char *parent_path)
+{
+ USB_NODE_INFORMATION hub_info;
+ HANDLE hub_device;
+ ULONG size = sizeof(hub_info);
+ char *device_name;
+
+ /* open the hub with its full name */
+ if (!(device_name = malloc(strlen("\\\\.\\") + strlen(hub_name) + 1)))
+ return;
+ strcpy(device_name, "\\\\.\\");
+ strcat(device_name, hub_name);
+ hub_device = CreateFile(device_name, GENERIC_WRITE, FILE_SHARE_WRITE,
+ NULL, OPEN_EXISTING, 0, NULL);
+ free(device_name);
+ if (hub_device == INVALID_HANDLE_VALUE)
+ return;
+
+ /* get the number of ports of the hub */
+ if (DeviceIoControl(hub_device, IOCTL_USB_GET_NODE_INFORMATION,
+ &hub_info, size, &hub_info, size, &size, NULL))
+ /* enumarate the ports of the hub */
+ enumerate_hub_ports(port, hub_device,
+ hub_info.u.HubInformation.HubDescriptor.bNumberOfPorts, parent_path);
+
+ CloseHandle(hub_device);
+}
+
+static void enumerate_host_controller(struct sp_port *port,
+ HANDLE host_controller_device)
+{
+ char *root_hub_name;
+
+ if ((root_hub_name = get_root_hub_name(host_controller_device))) {
+ enumerate_hub(port, root_hub_name, "");
+ free(root_hub_name);
+ }
+}
+
+static void get_usb_details(struct sp_port *port, DEVINST dev_inst_match)
+{
+ HDEVINFO device_info;
+ SP_DEVINFO_DATA device_info_data;
+ ULONG i, size = 0;
+
+ device_info = SetupDiGetClassDevs(&GUID_CLASS_USB_HOST_CONTROLLER,NULL,NULL,
+ DIGCF_PRESENT | DIGCF_DEVICEINTERFACE);
+ device_info_data.cbSize = sizeof(device_info_data);
+
+ for (i=0; SetupDiEnumDeviceInfo(device_info, i, &device_info_data); i++) {
+ SP_DEVICE_INTERFACE_DATA device_interface_data;
+ PSP_DEVICE_INTERFACE_DETAIL_DATA device_detail_data;
+ DEVINST dev_inst = dev_inst_match;
+ HANDLE host_controller_device;
+
+ device_interface_data.cbSize = sizeof(device_interface_data);
+ if (!SetupDiEnumDeviceInterfaces(device_info, 0,
+ &GUID_CLASS_USB_HOST_CONTROLLER,
+ i, &device_interface_data))
+ continue;
+
+ if (!SetupDiGetDeviceInterfaceDetail(device_info,&device_interface_data,
+ NULL, 0, &size, NULL)
+ && GetLastError() != ERROR_INSUFFICIENT_BUFFER)
+ continue;
+
+ if (!(device_detail_data = malloc(size)))
+ continue;
+ device_detail_data->cbSize = sizeof(*device_detail_data);
+ if (!SetupDiGetDeviceInterfaceDetail(device_info,&device_interface_data,
+ device_detail_data, size, &size,
+ NULL)) {
+ free(device_detail_data);
+ continue;
+ }
+
+ while (CM_Get_Parent(&dev_inst, dev_inst, 0) == CR_SUCCESS
+ && dev_inst != device_info_data.DevInst) { }
+ if (dev_inst != device_info_data.DevInst) {
+ free(device_detail_data);
+ continue;
+ }
+
+ port->usb_bus = i + 1;
+
+ host_controller_device = CreateFile(device_detail_data->DevicePath,
+ GENERIC_WRITE, FILE_SHARE_WRITE,
+ NULL, OPEN_EXISTING, 0, NULL);
+ if (host_controller_device != INVALID_HANDLE_VALUE) {
+ enumerate_host_controller(port, host_controller_device);
+ CloseHandle(host_controller_device);
+ }
+ free(device_detail_data);
+ }
+
+ SetupDiDestroyDeviceInfoList(device_info);
+ return;
+}
+
+#endif /* _WIN32 */
+
+static enum sp_return sp_get_port_details(struct sp_port *port)
+{
+ /* Description limited to 127 char,
+ anything longer would not be user friendly anyway */
+ char description[128];
+#ifndef _WIN32
+ int bus, address, vid, pid = -1;
+ char manufacturer[128], product[128], serial[128];
+ char baddr[32];
+#endif
+
+ port->description = NULL;
+ port->transport = SP_TRANSPORT_NATIVE;
+ port->usb_bus = -1;
+ port->usb_address = -1;
+ port->usb_vid = -1;
+ port->usb_pid = -1;
+ port->usb_manufacturer = NULL;
+ port->usb_product = NULL;
+ port->usb_serial = NULL;
+ port->bluetooth_address = NULL;
+
+#ifdef _WIN32
+ SP_DEVINFO_DATA device_info_data = { .cbSize = sizeof(device_info_data) };
+ HDEVINFO device_info;
+ int i;
+
+ device_info = SetupDiGetClassDevs(NULL, 0, 0,
+ DIGCF_PRESENT | DIGCF_ALLCLASSES);
+ if (device_info == INVALID_HANDLE_VALUE)
+ RETURN_FAIL("SetupDiGetClassDevs() failed");
+
+ for (i=0; SetupDiEnumDeviceInfo(device_info, i, &device_info_data); i++) {
+ HKEY device_key;
+ DEVINST dev_inst;
+ char value[8], class[16];
+ DWORD size, type;
+ CONFIGRET cr;
+
+ /* check if this is the device we are looking for */
+ if (!(device_key = SetupDiOpenDevRegKey(device_info, &device_info_data,
+ DICS_FLAG_GLOBAL, 0,
+ DIREG_DEV, KEY_QUERY_VALUE)))
+ continue;
+ size = sizeof(value);
+ if (RegQueryValueExA(device_key, "PortName", NULL, &type, (LPBYTE)value,
+ &size) != ERROR_SUCCESS || type != REG_SZ)
+ continue;
+ RegCloseKey(device_key);
+ value[sizeof(value)-1] = 0;
+ if (strcmp(value, port->name))
+ continue;
+
+ /* check port transport type */
+ dev_inst = device_info_data.DevInst;
+ size = sizeof(class);
+ cr = CR_FAILURE;
+ while (CM_Get_Parent(&dev_inst, dev_inst, 0) == CR_SUCCESS &&
+ (cr = CM_Get_DevNode_Registry_PropertyA(dev_inst,
+ CM_DRP_CLASS, 0, class, &size, 0)) != CR_SUCCESS) { }
+ if (cr == CR_SUCCESS) {
+ if (!strcmp(class, "USB"))
+ port->transport = SP_TRANSPORT_USB;
+ }
+
+ /* get port description (friendly name) */
+ dev_inst = device_info_data.DevInst;
+ size = sizeof(description);
+ while ((cr = CM_Get_DevNode_Registry_PropertyA(dev_inst,
+ CM_DRP_FRIENDLYNAME, 0, description, &size, 0)) != CR_SUCCESS
+ && CM_Get_Parent(&dev_inst, dev_inst, 0) == CR_SUCCESS) { }
+ if (cr == CR_SUCCESS)
+ port->description = strdup(description);
+
+ /* get more informations for USB connected ports */
+ if (port->transport == SP_TRANSPORT_USB) {
+ char usb_path[MAX_USB_PATH] = "", tmp[MAX_USB_PATH];
+ char device_id[MAX_DEVICE_ID_LEN];
+
+ /* recurse over parents to build the USB device path */
+ dev_inst = device_info_data.DevInst;
+ do {
+ /* verify that this layer of the tree is USB related */
+ if (CM_Get_Device_IDA(dev_inst, device_id,
+ sizeof(device_id), 0) != CR_SUCCESS
+ || strncmp(device_id, "USB\\", 4))
+ continue;
+
+ /* discard one layer for composite devices */
+ char compat_ids[512], *p = compat_ids;
+ size = sizeof(compat_ids);
+ if (CM_Get_DevNode_Registry_PropertyA(dev_inst,
+ CM_DRP_COMPATIBLEIDS, 0,
+ &compat_ids,
+ &size, 0) == CR_SUCCESS) {
+ while (*p) {
+ if (!strncmp(p, "USB\\COMPOSITE", 13))
+ break;
+ p += strlen(p) + 1;
+ }
+ if (*p)
+ continue;
+ }
+
+ /* stop the recursion when reaching the USB root */
+ if (!strncmp(device_id, "USB\\ROOT", 8))
+ break;
+
+ /* prepend the address of current USB layer to the USB path */
+ DWORD address;
+ size = sizeof(address);
+ if (CM_Get_DevNode_Registry_PropertyA(dev_inst, CM_DRP_ADDRESS,
+ 0, &address, &size, 0) == CR_SUCCESS) {
+ strcpy(tmp, usb_path);
+ snprintf(usb_path, sizeof(usb_path), "%d%s%s",
+ (int)address, *tmp ? "." : "", tmp);
+ }
+ } while (CM_Get_Parent(&dev_inst, dev_inst, 0) == CR_SUCCESS);
+
+ port->usb_path = strdup(usb_path);
+
+ /* wake up the USB device to be able to read string descriptor */
+ char *escaped_port_name;
+ HANDLE handle;
+ if (!(escaped_port_name = malloc(strlen(port->name) + 5)))
+ RETURN_ERROR(SP_ERR_MEM, "Escaped port name malloc failed");
+ sprintf(escaped_port_name, "\\\\.\\%s", port->name);
+ handle = CreateFile(escaped_port_name, GENERIC_READ, 0, 0,
+ OPEN_EXISTING,
+ FILE_ATTRIBUTE_NORMAL|FILE_FLAG_OVERLAPPED, 0);
+ free(escaped_port_name);
+ CloseHandle(handle);
+
+ /* retrive USB device details from the device descriptor */
+ get_usb_details(port, device_info_data.DevInst);
+ }
+ break;
+ }
+#elif defined(__APPLE__)
+ CFMutableDictionaryRef classes;
+ io_iterator_t iter;
+ io_object_t ioport;
+ CFTypeRef cf_property, cf_bus, cf_address, cf_vendor, cf_product;
+ Boolean result;
+ char path[PATH_MAX];
+
+ DEBUG("Getting serial port list");
+ if (!(classes = IOServiceMatching(kIOSerialBSDServiceValue)))
+ RETURN_FAIL("IOServiceMatching() failed");
+
+ if (IOServiceGetMatchingServices(kIOMasterPortDefault, classes,
+ &iter) != KERN_SUCCESS)
+ RETURN_FAIL("IOServiceGetMatchingServices() failed");
+
+ DEBUG("Iterating over results");
+ while ((ioport = IOIteratorNext(iter))) {
+ if (!(cf_property = IORegistryEntryCreateCFProperty(ioport,
+ CFSTR(kIOCalloutDeviceKey), kCFAllocatorDefault, 0))) {
+ IOObjectRelease(ioport);
+ continue;
+ }
+ result = CFStringGetCString(cf_property, path, sizeof(path),
+ kCFStringEncodingASCII);
+ CFRelease(cf_property);
+ if (!result || strcmp(path, port->name)) {
+ IOObjectRelease(ioport);
+ continue;
+ }
+ DEBUG("Found port %s", path);
+
+ IORegistryEntryGetParentEntry(ioport, kIOServicePlane, &ioparent);
+ if ((cf_property=IORegistryEntrySearchCFProperty(ioparent,kIOServicePlane,
+ CFSTR("IOProviderClass"), kCFAllocatorDefault,
+ kIORegistryIterateRecursively | kIORegistryIterateParents))) {
+ if (CFStringGetCString(cf_property, class, sizeof(class),
+ kCFStringEncodingASCII) &&
+ strstr(class, "USB")) {
+ DEBUG("Found USB class device");
+ port->transport = SP_TRANSPORT_USB;
+ }
+ CFRelease(cf_property);
+ }
+ IOObjectRelease(ioparent);
+
+ if ((cf_property = IORegistryEntrySearchCFProperty(ioport,kIOServicePlane,
+ CFSTR("USB Interface Name"), kCFAllocatorDefault,
+ kIORegistryIterateRecursively | kIORegistryIterateParents)) ||
+ (cf_property = IORegistryEntrySearchCFProperty(ioport,kIOServicePlane,
+ CFSTR("USB Product Name"), kCFAllocatorDefault,
+ kIORegistryIterateRecursively | kIORegistryIterateParents)) ||
+ (cf_property = IORegistryEntrySearchCFProperty(ioport,kIOServicePlane,
+ CFSTR("Product Name"), kCFAllocatorDefault,
+ kIORegistryIterateRecursively | kIORegistryIterateParents)) ||
+ (cf_property = IORegistryEntryCreateCFProperty(ioport,
+ CFSTR(kIOTTYDeviceKey), kCFAllocatorDefault, 0))) {
+ if (CFStringGetCString(cf_property, description, sizeof(description),
+ kCFStringEncodingASCII)) {
+ DEBUG("Found description %s", description);
+ port->description = strdup(description);
+ }
+ CFRelease(cf_property);
+ } else {
+ DEBUG("No description for this device");
+ }
+
+ cf_bus = IORegistryEntrySearchCFProperty(ioport, kIOServicePlane,
+ CFSTR("USBBusNumber"),
+ kCFAllocatorDefault,
+ kIORegistryIterateRecursively
+ | kIORegistryIterateParents);
+ cf_address = IORegistryEntrySearchCFProperty(ioport, kIOServicePlane,
+ CFSTR("USB Address"),
+ kCFAllocatorDefault,
+ kIORegistryIterateRecursively
+ | kIORegistryIterateParents);
+ if (cf_bus && cf_address &&
+ CFNumberGetValue(cf_bus , kCFNumberIntType, &bus) &&
+ CFNumberGetValue(cf_address, kCFNumberIntType, &address)) {
+ DEBUG("Found matching USB bus:address %03d:%03d", bus, address);
+ port->usb_bus = bus;
+ port->usb_address = address;
+ }
+ if (cf_bus ) CFRelease(cf_bus);
+ if (cf_address) CFRelease(cf_address);
+
+ cf_vendor = IORegistryEntrySearchCFProperty(ioport, kIOServicePlane,
+ CFSTR("idVendor"),
+ kCFAllocatorDefault,
+ kIORegistryIterateRecursively
+ | kIORegistryIterateParents);
+ cf_product = IORegistryEntrySearchCFProperty(ioport, kIOServicePlane,
+ CFSTR("idProduct"),
+ kCFAllocatorDefault,
+ kIORegistryIterateRecursively
+ | kIORegistryIterateParents);
+ if (cf_vendor && cf_product &&
+ CFNumberGetValue(cf_vendor , kCFNumberIntType, &vid) &&
+ CFNumberGetValue(cf_product, kCFNumberIntType, &pid)) {
+ DEBUG("Found matching USB vid:pid %04X:%04X", vid, pid);
+ port->usb_vid = vid;
+ port->usb_pid = pid;
+ }
+ if (cf_vendor ) CFRelease(cf_vendor);
+ if (cf_product) CFRelease(cf_product);
+
+ if ((cf_property = IORegistryEntrySearchCFProperty(ioport,kIOServicePlane,
+ CFSTR("USB Vendor Name"), kCFAllocatorDefault,
+ kIORegistryIterateRecursively | kIORegistryIterateParents))) {
+ if (CFStringGetCString(cf_property, manufacturer, sizeof(manufacturer),
+ kCFStringEncodingASCII)) {
+ DEBUG("Found manufacturer %s", manufacturer);
+ port->usb_manufacturer = strdup(manufacturer);
+ }
+ CFRelease(cf_property);
+ }
+
+ if ((cf_property = IORegistryEntrySearchCFProperty(ioport,kIOServicePlane,
+ CFSTR("USB Product Name"), kCFAllocatorDefault,
+ kIORegistryIterateRecursively | kIORegistryIterateParents))) {
+ if (CFStringGetCString(cf_property, product, sizeof(product),
+ kCFStringEncodingASCII)) {
+ DEBUG("Found product name %s", product);
+ port->usb_product = strdup(product);
+ }
+ CFRelease(cf_property);
+ }
+
+ if ((cf_property = IORegistryEntrySearchCFProperty(ioport,kIOServicePlane,
+ CFSTR("USB Serial Number"), kCFAllocatorDefault,
+ kIORegistryIterateRecursively | kIORegistryIterateParents))) {
+ if (CFStringGetCString(cf_property, serial, sizeof(serial),
+ kCFStringEncodingASCII)) {
+ DEBUG("Found serial number %s", serial);
+ port->usb_serial = strdup(serial);
+ }
+ CFRelease(cf_property);
+ }
+
+ IOObjectRelease(ioport);
+ break;
+ }
+ IOObjectRelease(iter);
+#elif defined(__linux__)
+ const char dir_name[] = "/sys/class/tty/%s/device/%s%s";
+ char sub_dir[32] = "", file_name[PATH_MAX];
+ char *ptr, *dev = port->name + 5;
+ FILE *file;
+ int i, count;
+
+ if (strncmp(port->name, "/dev/", 5))
+ RETURN_ERROR(SP_ERR_ARG, "Device name not recognized (%s)", port->name);
+
+ snprintf(file_name, sizeof(file_name), "/sys/class/tty/%s", dev);
+ count = readlink(file_name, file_name, sizeof(file_name));
+ if (count <= 0 || count >= (int) sizeof(file_name)-1)
+ RETURN_ERROR(SP_ERR_ARG, "Device not found (%s)", port->name);
+ file_name[count] = 0;
+ if (strstr(file_name, "bluetooth"))
+ port->transport = SP_TRANSPORT_BLUETOOTH;
+ else if (strstr(file_name, "usb"))
+ port->transport = SP_TRANSPORT_USB;
+
+ if (port->transport == SP_TRANSPORT_USB) {
+ for (i=0; i<5; i++) {
+ strcat(sub_dir, "../");
+
+ snprintf(file_name,sizeof(file_name),dir_name,dev,sub_dir,"busnum");
+ if (!(file = fopen(file_name, "r")))
+ continue;
+ count = fscanf(file, "%d", &bus);
+ fclose(file);
+ if (count != 1)
+ continue;
+
+ snprintf(file_name,sizeof(file_name),dir_name,dev,sub_dir,"devnum");
+ if (!(file = fopen(file_name, "r")))
+ continue;
+ count = fscanf(file, "%d", &address);
+ fclose(file);
+ if (count != 1)
+ continue;
+
+ snprintf(file_name,sizeof(file_name),dir_name,dev,sub_dir,"idVendor");
+ if (!(file = fopen(file_name, "r")))
+ continue;
+ count = fscanf(file, "%4x", &vid);
+ fclose(file);
+ if (count != 1)
+ continue;
+
+ snprintf(file_name,sizeof(file_name),dir_name,dev,sub_dir,"idProduct");
+ if (!(file = fopen(file_name, "r")))
+ continue;
+ count = fscanf(file, "%4x", &pid);
+ fclose(file);
+ if (count != 1)
+ continue;
+
+ port->usb_bus = bus;
+ port->usb_address = address;
+ port->usb_vid = vid;
+ port->usb_pid = pid;
+
+ snprintf(file_name,sizeof(file_name),dir_name,dev,sub_dir,"product");
+ if ((file = fopen(file_name, "r"))) {
+ if ((ptr = fgets(description, sizeof(description), file))) {
+ ptr = description + strlen(description) - 1;
+ if (ptr >= description && *ptr == '\n')
+ *ptr = 0;
+ port->description = strdup(description);
+ }
+ fclose(file);
+ }
+ if (!file || !ptr)
+ port->description = strdup(dev);
+
+ snprintf(file_name,sizeof(file_name),dir_name,dev,sub_dir,"manufacturer");
+ if ((file = fopen(file_name, "r"))) {
+ if ((ptr = fgets(manufacturer, sizeof(manufacturer), file))) {
+ ptr = manufacturer + strlen(manufacturer) - 1;
+ if (ptr >= manufacturer && *ptr == '\n')
+ *ptr = 0;
+ port->usb_manufacturer = strdup(manufacturer);
+ }
+ fclose(file);
+ }
+
+ snprintf(file_name,sizeof(file_name),dir_name,dev,sub_dir,"product");
+ if ((file = fopen(file_name, "r"))) {
+ if ((ptr = fgets(product, sizeof(product), file))) {
+ ptr = product + strlen(product) - 1;
+ if (ptr >= product && *ptr == '\n')
+ *ptr = 0;
+ port->usb_product = strdup(product);
+ }
+ fclose(file);
+ }
+
+ snprintf(file_name,sizeof(file_name),dir_name,dev,sub_dir,"serial");
+ if ((file = fopen(file_name, "r"))) {
+ if ((ptr = fgets(serial, sizeof(serial), file))) {
+ ptr = serial + strlen(serial) - 1;
+ if (ptr >= serial && *ptr == '\n')
+ *ptr = 0;
+ port->usb_serial = strdup(serial);
+ }
+ fclose(file);
+ }
+
+ break;
+ }
+ } else {
+ port->description = strdup(dev);
+
+ if (port->transport == SP_TRANSPORT_BLUETOOTH) {
+ snprintf(file_name, sizeof(file_name), dir_name, dev, "", "address");
+ if ((file = fopen(file_name, "r"))) {
+ if ((ptr = fgets(baddr, sizeof(baddr), file))) {
+ ptr = baddr + strlen(baddr) - 1;
+ if (ptr >= baddr && *ptr == '\n')
+ *ptr = 0;
+ port->bluetooth_address = strdup(baddr);
+ }
+ fclose(file);
+ }
+ }
+ }
+#else
+ DEBUG("Port details not supported on this platform");
+#endif
+
+ RETURN_OK();
+}
+
+enum sp_return sp_get_port_by_name(const char *portname, struct sp_port **port_ptr)
+{
+ struct sp_port *port;
+ enum sp_return ret;
+ int len;
+
+ TRACE("%s, %p", portname, port_ptr);
+
+ if (!port_ptr)
+ RETURN_ERROR(SP_ERR_ARG, "Null result pointer");
+
+ *port_ptr = NULL;
+
+ if (!portname)
+ RETURN_ERROR(SP_ERR_ARG, "Null port name");
+
+ DEBUG("Building structure for port %s", portname);
+
+ if (!(port = malloc(sizeof(struct sp_port))))
+ RETURN_ERROR(SP_ERR_MEM, "Port structure malloc failed");
+
+ len = strlen(portname) + 1;
+
+ if (!(port->name = malloc(len))) {
+ free(port);
+ RETURN_ERROR(SP_ERR_MEM, "Port name malloc failed");
+ }
+
+ memcpy(port->name, portname, len);
+
+#ifdef _WIN32
+ port->hdl = INVALID_HANDLE_VALUE;
+#else
+ port->fd = -1;
+#endif
+
+ if ((ret = sp_get_port_details(port)) != SP_OK) {
+ sp_free_port(port);
+ return ret;
+ }
+
+ *port_ptr = port;
+
+ RETURN_OK();
+}
+
+char *sp_get_port_name(const struct sp_port *port)
+{
+ TRACE("%p", port);
+
+ if (!port)
+ return NULL;
+
+ RETURN_VALUE("%s", port->name);
+}
+
+char *sp_get_port_description(struct sp_port *port)
+{
+ TRACE("%p", port);
+
+ if (!port || !port->description)
+ return NULL;
+
+ RETURN_VALUE("%s", port->description);
+}
+
+enum sp_transport sp_get_port_transport(struct sp_port *port)
+{
+ TRACE("%p", port);
+
+ if (!port)
+ RETURN_ERROR(SP_ERR_ARG, "Null port");
+
+ RETURN_VALUE("%d", port->transport);
+}
+
+enum sp_return sp_get_port_usb_bus_address(const struct sp_port *port,
+ int *usb_bus, int *usb_address)
+{
+ TRACE("%p", port);
+
+ if (!port)
+ RETURN_ERROR(SP_ERR_ARG, "Null port");
+ if (port->transport != SP_TRANSPORT_USB)
+ RETURN_ERROR(SP_ERR_ARG, "Port does not use USB transport");
+
+ if (usb_bus) *usb_bus = port->usb_bus;
+ if (usb_address) *usb_address = port->usb_address;
+
+ RETURN_OK();
+}
+
+enum sp_return sp_get_port_usb_vid_pid(const struct sp_port *port,
+ int *usb_vid, int *usb_pid)
+{
+ TRACE("%p", port);
+
+ if (!port)
+ RETURN_ERROR(SP_ERR_ARG, "Null port");
+ if (port->transport != SP_TRANSPORT_USB)
+ RETURN_ERROR(SP_ERR_ARG, "Port does not use USB transport");
+
+ if (usb_vid) *usb_vid = port->usb_vid;
+ if (usb_pid) *usb_pid = port->usb_pid;
+
+ RETURN_OK();
+}
+
+char *sp_get_port_usb_manufacturer(const struct sp_port *port)
+{
+ TRACE("%p", port);
+
+ if (!port || port->transport != SP_TRANSPORT_USB || !port->usb_manufacturer)
+ return NULL;
+
+ RETURN_VALUE("%s", port->usb_manufacturer);
+}
+
+char *sp_get_port_usb_product(const struct sp_port *port)
+{
+ TRACE("%p", port);
+
+ if (!port || port->transport != SP_TRANSPORT_USB || !port->usb_product)
+ return NULL;
+
+ RETURN_VALUE("%s", port->usb_product);
+}
+
+char *sp_get_port_usb_serial(const struct sp_port *port)
+{
+ TRACE("%p", port);
+
+ if (!port || port->transport != SP_TRANSPORT_USB || !port->usb_serial)
+ return NULL;
+
+ RETURN_VALUE("%s", port->usb_serial);
+}
+
+char *sp_get_port_bluetooth_address(const struct sp_port *port)
+{
+ TRACE("%p", port);
+
+ if (!port || port->transport != SP_TRANSPORT_BLUETOOTH
+ || !port->bluetooth_address)
+ return NULL;
+
+ RETURN_VALUE("%s", port->bluetooth_address);
+}
+
+enum sp_return sp_get_port_handle(const struct sp_port *port, void *result_ptr)
+{
+ TRACE("%p, %p", port, result_ptr);
+
+ if (!port)
+ RETURN_ERROR(SP_ERR_ARG, "Null port");
+
+#ifdef _WIN32
+ HANDLE *handle_ptr = result_ptr;
+ *handle_ptr = port->hdl;
+#else
+ int *fd_ptr = result_ptr;
+ *fd_ptr = port->fd;
+#endif
+
+ RETURN_OK();
+}
+
+enum sp_return sp_copy_port(const struct sp_port *port, struct sp_port **copy_ptr)
+{
+ TRACE("%p, %p", port, copy_ptr);
+
+ if (!copy_ptr)
+ RETURN_ERROR(SP_ERR_ARG, "Null result pointer");
+
+ *copy_ptr = NULL;
+
+ if (!port)
+ RETURN_ERROR(SP_ERR_ARG, "Null port");
+
+ if (!port->name)
+ RETURN_ERROR(SP_ERR_ARG, "Null port name");
+
+ DEBUG("Copying port structure");
+
+ RETURN_VALUE("%p", sp_get_port_by_name(port->name, copy_ptr));
+}
+
+void sp_free_port(struct sp_port *port)
+{
+ TRACE("%p", port);
+
+ if (!port) {
+ DEBUG("Null port");
+ RETURN();
+ }
+
+ DEBUG("Freeing port structure");
+
+ if (port->name)
+ free(port->name);
+ if (port->description)
+ free(port->description);
+ if (port->usb_manufacturer)
+ free(port->usb_manufacturer);
+ if (port->usb_product)
+ free(port->usb_product);
+ if (port->usb_serial)
+ free(port->usb_serial);
+ if (port->bluetooth_address)
+ free(port->bluetooth_address);
+#ifdef _WIN32
+ if (port->usb_path)
+ free(port->usb_path);
+#endif
+
+ free(port);
+
+ RETURN();
+}
+
+static struct sp_port **list_append(struct sp_port **list, const char *portname)
+{
+ void *tmp;
+ unsigned int count;
+
+ for (count = 0; list[count]; count++);
+ if (!(tmp = realloc(list, sizeof(struct sp_port *) * (count + 2))))
+ goto fail;
+ list = tmp;
+ if (sp_get_port_by_name(portname, &list[count]) != SP_OK)
+ goto fail;
+ list[count + 1] = NULL;
+ return list;
+
+fail:
+ sp_free_port_list(list);
+ return NULL;
+}
+
+enum sp_return sp_list_ports(struct sp_port ***list_ptr)
+{
+ struct sp_port **list;
+ int ret = SP_ERR_SUPP;
+
+ TRACE("%p", list_ptr);
+
+ if (!list_ptr)
+ RETURN_ERROR(SP_ERR_ARG, "Null result pointer");
+
+ DEBUG("Enumerating ports");
+
+ if (!(list = malloc(sizeof(struct sp_port **))))
+ RETURN_ERROR(SP_ERR_MEM, "Port list malloc failed");
+
+ list[0] = NULL;
+
+#ifdef _WIN32
+ HKEY key;
+ TCHAR *value, *data;
+ DWORD max_value_len, max_data_size, max_data_len;
+ DWORD value_len, data_size, data_len;
+ DWORD type, index = 0;
+ char *name;
+ int name_len;
+
+ ret = SP_OK;
+
+ DEBUG("Opening registry key");
+ if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, _T("HARDWARE\\DEVICEMAP\\SERIALCOMM"),
+ 0, KEY_QUERY_VALUE, &key) != ERROR_SUCCESS) {
+ SET_FAIL(ret, "RegOpenKeyEx() failed");
+ goto out_done;
+ }
+ DEBUG("Querying registry key value and data sizes");
+ if (RegQueryInfoKey(key, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+ &max_value_len, &max_data_size, NULL, NULL) != ERROR_SUCCESS) {
+ SET_FAIL(ret, "RegQueryInfoKey() failed");
+ goto out_close;
+ }
+ max_data_len = max_data_size / sizeof(TCHAR);
+ if (!(value = malloc((max_value_len + 1) * sizeof(TCHAR)))) {
+ SET_ERROR(ret, SP_ERR_MEM, "registry value malloc failed");
+ goto out_close;
+ }
+ if (!(data = malloc((max_data_len + 1) * sizeof(TCHAR)))) {
+ SET_ERROR(ret, SP_ERR_MEM, "registry data malloc failed");
+ goto out_free_value;
+ }
+ DEBUG("Iterating over values");
+ while (
+ value_len = max_value_len + 1,
+ data_size = max_data_size,
+ RegEnumValue(key, index, value, &value_len,
+ NULL, &type, (LPBYTE)data, &data_size) == ERROR_SUCCESS)
+ {
+ data_len = data_size / sizeof(TCHAR);
+ data[data_len] = '\0';
+#ifdef UNICODE
+ name_len = WideCharToMultiByte(CP_ACP, 0, data, -1, NULL, 0, NULL, NULL);
+#else
+ name_len = data_len + 1;
+#endif
+ if (!(name = malloc(name_len))) {
+ SET_ERROR(ret, SP_ERR_MEM, "registry port name malloc failed");
+ goto out;
+ }
+#ifdef UNICODE
+ WideCharToMultiByte(CP_ACP, 0, data, -1, name, name_len, NULL, NULL);
+#else
+ strcpy(name, data);
+#endif
+ if (type == REG_SZ) {
+ DEBUG("Found port %s", name);
+ if (!(list = list_append(list, name))) {
+ SET_ERROR(ret, SP_ERR_MEM, "list append failed");
+ goto out;
+ }
+ }
+ index++;
+ }
+out:
+ free(data);
+out_free_value:
+ free(value);
+out_close:
+ RegCloseKey(key);
+out_done:
+#endif
+#ifdef __APPLE__
+ CFMutableDictionaryRef classes;
+ io_iterator_t iter;
+ char path[PATH_MAX];
+ io_object_t port;
+ CFTypeRef cf_path;
+ Boolean result;
+
+ ret = SP_OK;
+
+ DEBUG("Creating matching dictionary");
+ if (!(classes = IOServiceMatching(kIOSerialBSDServiceValue))) {
+ SET_FAIL(ret, "IOServiceMatching() failed");
+ goto out_done;
+ }
+
+ DEBUG("Getting matching services");
+ if (IOServiceGetMatchingServices(kIOMasterPortDefault, classes,
+ &iter) != KERN_SUCCESS) {
+ SET_FAIL(ret, "IOServiceGetMatchingServices() failed");
+ goto out_done;
+ }
+
+ DEBUG("Iterating over results");
+ while ((port = IOIteratorNext(iter))) {
+ cf_path = IORegistryEntryCreateCFProperty(port,
+ CFSTR(kIOCalloutDeviceKey), kCFAllocatorDefault, 0);
+ if (cf_path) {
+ result = CFStringGetCString(cf_path, path, sizeof(path),
+ kCFStringEncodingASCII);
+ CFRelease(cf_path);
+ if (result) {
+ DEBUG("Found port %s", path);
+ if (!(list = list_append(list, path))) {
+ SET_ERROR(ret, SP_ERR_MEM, "list append failed");
+ IOObjectRelease(port);
+ goto out;
+ }
+ }
+ }
+ IOObjectRelease(port);
+ }
+out:
+ IOObjectRelease(iter);
+out_done:
+#endif
+#ifdef __linux__
+ char name[PATH_MAX], target[PATH_MAX];
+ struct dirent entry, *result;
+ struct serial_struct serial_info;
+ int len, fd, ioctl_result;
+ DIR *dir;
+
+ ret = SP_OK;
+
+ DEBUG("Enumerating tty devices");
+ if (!(dir = opendir("/sys/class/tty")))
+ RETURN_FAIL("could not open /sys/class/tty");
+
+ DEBUG("Iterating over results");
+ while (!readdir_r(dir, &entry, &result) && result) {
+ len = readlinkat(dirfd(dir), entry.d_name, target, sizeof(target));
+ if (len <= 0 || len >= (int) sizeof(target)-1)
+ continue;
+ target[len] = 0;
+ if (strstr(target, "virtual"))
+ continue;
+ snprintf(name, sizeof(name), "/dev/%s", entry.d_name);
+ DEBUG("Found device %s", name);
+ if (strstr(target, "serial8250")) {
+ /* The serial8250 driver has a hardcoded number of ports.
+ * The only way to tell which actually exist on a given system
+ * is to try to open them and make an ioctl call. */
+ DEBUG("serial8250 device, attempting to open");
+ if ((fd = open(name, O_RDWR | O_NONBLOCK | O_NOCTTY)) < 0) {
+ DEBUG("open failed, skipping");
+ continue;
+ }
+ ioctl_result = ioctl(fd, TIOCGSERIAL, &serial_info);
+ close(fd);
+ if (ioctl_result != 0) {
+ DEBUG("ioctl failed, skipping");
+ continue;
+ }
+ if (serial_info.type == PORT_UNKNOWN) {
+ DEBUG("port type is unknown, skipping");
+ continue;
+ }
+ }
+ DEBUG("Found port %s", name);
+ list = list_append(list, name);
+ if (!list) {
+ SET_ERROR(ret, SP_ERR_MEM, "list append failed");
+ break;
+ }
+ }
+ closedir(dir);
+#endif
+
+ switch (ret) {
+ case SP_OK:
+ *list_ptr = list;
+ RETURN_OK();
+ case SP_ERR_SUPP:
+ DEBUG_ERROR(SP_ERR_SUPP, "Enumeration not supported on this platform");
+ default:
+ if (list)
+ sp_free_port_list(list);
+ *list_ptr = NULL;
+ return ret;
+ }
+}
+
+void sp_free_port_list(struct sp_port **list)
+{
+ unsigned int i;
+
+ TRACE("%p", list);
+
+ if (!list) {
+ DEBUG("Null list");
+ RETURN();
+ }
+
+ DEBUG("Freeing port list");
+
+ for (i = 0; list[i]; i++)
+ sp_free_port(list[i]);
+ free(list);
+
+ RETURN();
+}
+
+#define CHECK_PORT() do { \
+ if (port == NULL) \
+ RETURN_ERROR(SP_ERR_ARG, "Null port"); \
+ if (port->name == NULL) \
+ RETURN_ERROR(SP_ERR_ARG, "Null port name"); \
+} while (0)
+#ifdef _WIN32
+#define CHECK_PORT_HANDLE() do { \
+ if (port->hdl == INVALID_HANDLE_VALUE) \
+ RETURN_ERROR(SP_ERR_ARG, "Invalid port handle"); \
+} while (0)
+#else
+#define CHECK_PORT_HANDLE() do { \
+ if (port->fd < 0) \
+ RETURN_ERROR(SP_ERR_ARG, "Invalid port fd"); \
+} while (0)
+#endif
+#define CHECK_OPEN_PORT() do { \
+ CHECK_PORT(); \
+ CHECK_PORT_HANDLE(); \
+} while (0)
+
+enum sp_return sp_open(struct sp_port *port, enum sp_mode flags)
+{
+ struct port_data data;
+ struct sp_port_config config;
+ enum sp_return ret;
+
+ TRACE("%p, 0x%x", port, flags);
+
+ CHECK_PORT();
+
+ if (flags > (SP_MODE_READ | SP_MODE_WRITE))
+ RETURN_ERROR(SP_ERR_ARG, "Invalid flags");
+
+ DEBUG("Opening port %s", port->name);
+
+#ifdef _WIN32
+ DWORD desired_access = 0, flags_and_attributes = 0, errors;
+ char *escaped_port_name;
+ COMSTAT status;
+
+ /* Prefix port name with '\\.\' to work with ports above COM9. */
+ if (!(escaped_port_name = malloc(strlen(port->name) + 5)))
+ RETURN_ERROR(SP_ERR_MEM, "Escaped port name malloc failed");
+ sprintf(escaped_port_name, "\\\\.\\%s", port->name);
+
+ /* Map 'flags' to the OS-specific settings. */
+ flags_and_attributes = FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED;
+ if (flags & SP_MODE_READ)
+ desired_access |= GENERIC_READ;
+ if (flags & SP_MODE_WRITE)
+ desired_access |= GENERIC_WRITE;
+
+ port->hdl = CreateFile(escaped_port_name, desired_access, 0, 0,
+ OPEN_EXISTING, flags_and_attributes, 0);
+
+ free(escaped_port_name);
+
+ if (port->hdl == INVALID_HANDLE_VALUE)
+ RETURN_FAIL("port CreateFile() failed");
+
+ /* All timeouts initially disabled. */
+ port->timeouts.ReadIntervalTimeout = 0;
+ port->timeouts.ReadTotalTimeoutMultiplier = 0;
+ port->timeouts.ReadTotalTimeoutConstant = 0;
+ port->timeouts.WriteTotalTimeoutMultiplier = 0;
+ port->timeouts.WriteTotalTimeoutConstant = 0;
+
+ if (SetCommTimeouts(port->hdl, &port->timeouts) == 0) {
+ sp_close(port);
+ RETURN_FAIL("SetCommTimeouts() failed");
+ }
+
+ /* Prepare OVERLAPPED structures. */
+#define INIT_OVERLAPPED(ovl) do { \
+ memset(&port->ovl, 0, sizeof(port->ovl)); \
+ port->ovl.hEvent = INVALID_HANDLE_VALUE; \
+ if ((port->ovl.hEvent = CreateEvent(NULL, TRUE, TRUE, NULL)) \
+ == INVALID_HANDLE_VALUE) { \
+ sp_close(port); \
+ RETURN_FAIL(#ovl "CreateEvent() failed"); \
+ } \
+} while (0)
+
+ INIT_OVERLAPPED(read_ovl);
+ INIT_OVERLAPPED(write_ovl);
+ INIT_OVERLAPPED(wait_ovl);
+
+ /* Set event mask for RX and error events. */
+ if (SetCommMask(port->hdl, EV_RXCHAR | EV_ERR) == 0) {
+ sp_close(port);
+ RETURN_FAIL("SetCommMask() failed");
+ }
+
+ /* Start background operation for RX and error events. */
+ if (WaitCommEvent(port->hdl, &port->events, &port->wait_ovl) == 0) {
+ if (GetLastError() != ERROR_IO_PENDING) {
+ sp_close(port);
+ RETURN_FAIL("WaitCommEvent() failed");
+ }
+ }
+
+ port->writing = FALSE;
+
+#else
+ int flags_local = O_NONBLOCK | O_NOCTTY;
+
+ /* Map 'flags' to the OS-specific settings. */
+ if (flags & (SP_MODE_READ | SP_MODE_WRITE))
+ flags_local |= O_RDWR;
+ else if (flags & SP_MODE_READ)
+ flags_local |= O_RDONLY;
+ else if (flags & SP_MODE_WRITE)
+ flags_local |= O_WRONLY;
+
+ if ((port->fd = open(port->name, flags_local)) < 0)
+ RETURN_FAIL("open() failed");
+#endif
+
+ ret = get_config(port, &data, &config);
+
+ if (ret < 0) {
+ sp_close(port);
+ RETURN_CODEVAL(ret);
+ }
+
+ /* Set sane port settings. */
+#ifdef _WIN32
+ data.dcb.fBinary = TRUE;
+ data.dcb.fDsrSensitivity = FALSE;
+ data.dcb.fErrorChar = FALSE;
+ data.dcb.fNull = FALSE;
+ data.dcb.fAbortOnError = TRUE;
+#else
+ /* Turn off all fancy termios tricks, give us a raw channel. */
+ data.term.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | ISTRIP | INLCR | IGNCR | ICRNL | IMAXBEL);
+#ifdef IUCLC
+ data.term.c_iflag &= ~IUCLC;
+#endif
+ data.term.c_oflag &= ~(OPOST | ONLCR | OCRNL | ONOCR | ONLRET);
+#ifdef OLCUC
+ data.term.c_oflag &= ~OLCUC;
+#endif
+#ifdef NLDLY
+ data.term.c_oflag &= ~NLDLY;
+#endif
+#ifdef CRDLY
+ data.term.c_oflag &= ~CRDLY;
+#endif
+#ifdef TABDLY
+ data.term.c_oflag &= ~TABDLY;
+#endif
+#ifdef BSDLY
+ data.term.c_oflag &= ~BSDLY;
+#endif
+#ifdef VTDLY
+ data.term.c_oflag &= ~VTDLY;
+#endif
+#ifdef FFDLY
+ data.term.c_oflag &= ~FFDLY;
+#endif
+#ifdef OFILL
+ data.term.c_oflag &= ~OFILL;
+#endif
+ data.term.c_lflag &= ~(ISIG | ICANON | ECHO | IEXTEN);
+ data.term.c_cc[VMIN] = 0;
+ data.term.c_cc[VTIME] = 0;
+
+ /* Ignore modem status lines; enable receiver; leave control lines alone on close. */
+ data.term.c_cflag |= (CLOCAL | CREAD | HUPCL);
+#endif
+
+#ifdef _WIN32
+ if (ClearCommError(port->hdl, &errors, &status) == 0)
+ RETURN_FAIL("ClearCommError() failed");
+#endif
+
+ ret = set_config(port, &data, &config);
+
+ if (ret < 0) {
+ sp_close(port);
+ RETURN_CODEVAL(ret);
+ }
+
+ RETURN_OK();
+}
+
+enum sp_return sp_close(struct sp_port *port)
+{
+ TRACE("%p", port);
+
+ CHECK_OPEN_PORT();
+
+ DEBUG("Closing port %s", port->name);
+
+#ifdef _WIN32
+ /* Returns non-zero upon success, 0 upon failure. */
+ if (CloseHandle(port->hdl) == 0)
+ RETURN_FAIL("port CloseHandle() failed");
+ port->hdl = INVALID_HANDLE_VALUE;
+
+ /* Close event handles for overlapped structures. */
+#define CLOSE_OVERLAPPED(ovl) do { \
+ if (port->ovl.hEvent != INVALID_HANDLE_VALUE && \
+ CloseHandle(port->ovl.hEvent) == 0) \
+ RETURN_FAIL(# ovl "event CloseHandle() failed"); \
+} while (0)
+ CLOSE_OVERLAPPED(read_ovl);
+ CLOSE_OVERLAPPED(write_ovl);
+ CLOSE_OVERLAPPED(wait_ovl);
+
+#else
+ /* Returns 0 upon success, -1 upon failure. */
+ if (close(port->fd) == -1)
+ RETURN_FAIL("close() failed");
+ port->fd = -1;
+#endif
+
+ RETURN_OK();
+}
+
+enum sp_return sp_flush(struct sp_port *port, enum sp_buffer buffers)
+{
+ TRACE("%p, 0x%x", port, buffers);
+
+ CHECK_OPEN_PORT();
+
+ if (buffers > SP_BUF_BOTH)
+ RETURN_ERROR(SP_ERR_ARG, "Invalid buffer selection");
+
+ const char *buffer_names[] = {"no", "input", "output", "both"};
+
+ DEBUG("Flushing %s buffers on port %s", buffer_names[buffers], port->name);
+
+#ifdef _WIN32
+ DWORD flags = 0;
+ if (buffers & SP_BUF_INPUT)
+ flags |= PURGE_RXCLEAR;
+ if (buffers & SP_BUF_OUTPUT)
+ flags |= PURGE_TXCLEAR;
+
+ /* Returns non-zero upon success, 0 upon failure. */
+ if (PurgeComm(port->hdl, flags) == 0)
+ RETURN_FAIL("PurgeComm() failed");
+#else
+ int flags = 0;
+ if (buffers & SP_BUF_BOTH)
+ flags = TCIOFLUSH;
+ else if (buffers & SP_BUF_INPUT)
+ flags = TCIFLUSH;
+ else if (buffers & SP_BUF_OUTPUT)
+ flags = TCOFLUSH;
+
+ /* Returns 0 upon success, -1 upon failure. */
+ if (tcflush(port->fd, flags) < 0)
+ RETURN_FAIL("tcflush() failed");
+#endif
+ RETURN_OK();
+}
+
+enum sp_return sp_drain(struct sp_port *port)
+{
+ TRACE("%p", port);
+
+ CHECK_OPEN_PORT();
+
+ DEBUG("Draining port %s", port->name);
+
+#ifdef _WIN32
+ /* Returns non-zero upon success, 0 upon failure. */
+ if (FlushFileBuffers(port->hdl) == 0)
+ RETURN_FAIL("FlushFileBuffers() failed");
+ RETURN_OK();
+#else
+ int result;
+ while (1) {
+#ifdef __ANDROID__
+ int arg = 1;
+ result = ioctl(port->fd, TCSBRK, &arg);
+#else
+ result = tcdrain(port->fd);
+#endif
+ if (result < 0) {
+ if (errno == EINTR) {
+ DEBUG("tcdrain() was interrupted");
+ continue;
+ } else {
+ RETURN_FAIL("tcdrain() failed");
+ }
+ } else {
+ RETURN_OK();
+ }
+ }
+#endif
+}
+
+enum sp_return sp_blocking_write(struct sp_port *port, const void *buf, size_t count, unsigned int timeout)
+{
+ TRACE("%p, %p, %d, %d", port, buf, count, timeout);
+
+ CHECK_OPEN_PORT();
+
+ if (!buf)
+ RETURN_ERROR(SP_ERR_ARG, "Null buffer");
+
+ if (timeout)
+ DEBUG("Writing %d bytes to port %s, timeout %d ms", count, port->name, timeout);
+ else
+ DEBUG("Writing %d bytes to port %s, no timeout", count, port->name);
+
+ if (count == 0)
+ RETURN_VALUE("0", 0);
+
+#ifdef _WIN32
+ DWORD bytes_written = 0;
+ BOOL result;
+
+ /* Wait for previous non-blocking write to complete, if any. */
+ if (port->writing) {
+ DEBUG("Waiting for previous write to complete");
+ result = GetOverlappedResult(port->hdl, &port->write_ovl, &bytes_written, TRUE);
+ port->writing = 0;
+ if (!result)
+ RETURN_FAIL("Previous write failed to complete");
+ DEBUG("Previous write completed");
+ }
+
+ /* Set timeout. */
+ port->timeouts.WriteTotalTimeoutConstant = timeout;
+ if (SetCommTimeouts(port->hdl, &port->timeouts) == 0)
+ RETURN_FAIL("SetCommTimeouts() failed");
+
+ /* Start write. */
+ if (WriteFile(port->hdl, buf, count, NULL, &port->write_ovl) == 0) {
+ if (GetLastError() == ERROR_IO_PENDING) {
+ DEBUG("Waiting for write to complete");
+ GetOverlappedResult(port->hdl, &port->write_ovl, &bytes_written, TRUE);
+ DEBUG("Write completed, %d/%d bytes written", bytes_written, count);
+ RETURN_VALUE("%d", bytes_written);
+ } else {
+ RETURN_FAIL("WriteFile() failed");
+ }
+ } else {
+ DEBUG("Write completed immediately");
+ RETURN_VALUE("%d", count);
+ }
+#else
+ size_t bytes_written = 0;
+ unsigned char *ptr = (unsigned char *) buf;
+ struct timeval start, delta, now, end = {0, 0};
+ fd_set fds;
+ int result;
+
+ if (timeout) {
+ /* Get time at start of operation. */
+ gettimeofday(&start, NULL);
+ /* Define duration of timeout. */
+ delta.tv_sec = timeout / 1000;
+ delta.tv_usec = (timeout % 1000) * 1000;
+ /* Calculate time at which we should give up. */
+ timeradd(&start, &delta, &end);
+ }
+
+ /* Loop until we have written the requested number of bytes. */
+ while (bytes_written < count)
+ {
+ /* Wait until space is available. */
+ FD_ZERO(&fds);
+ FD_SET(port->fd, &fds);
+ if (timeout) {
+ gettimeofday(&now, NULL);
+ if (timercmp(&now, &end, >)) {
+ DEBUG("write timed out");
+ RETURN_VALUE("%d", bytes_written);
+ }
+ timersub(&end, &now, &delta);
+ }
+ result = select(port->fd + 1, NULL, &fds, NULL, timeout ? &delta : NULL);
+ if (result < 0) {
+ if (errno == EINTR) {
+ DEBUG("select() call was interrupted, repeating");
+ continue;
+ } else {
+ RETURN_FAIL("select() failed");
+ }
+ } else if (result == 0) {
+ DEBUG("write timed out");
+ RETURN_VALUE("%d", bytes_written);
+ }
+
+ /* Do write. */
+ result = write(port->fd, ptr, count - bytes_written);
+
+ if (result < 0) {
+ if (errno == EAGAIN)
+ /* This shouldn't happen because we did a select() first, but handle anyway. */
+ continue;
+ else
+ /* This is an actual failure. */
+ RETURN_FAIL("write() failed");
+ }
+
+ bytes_written += result;
+ ptr += result;
+ }
+
+ RETURN_VALUE("%d", bytes_written);
+#endif
+}
+
+enum sp_return sp_nonblocking_write(struct sp_port *port, const void *buf, size_t count)
+{
+ TRACE("%p, %p, %d", port, buf, count);
+
+ CHECK_OPEN_PORT();
+
+ if (!buf)
+ RETURN_ERROR(SP_ERR_ARG, "Null buffer");
+
+ DEBUG("Writing up to %d bytes to port %s", count, port->name);
+
+ if (count == 0)
+ RETURN_VALUE("0", 0);
+
+#ifdef _WIN32
+ DWORD written = 0;
+ BYTE *ptr = (BYTE *) buf;
+
+ /* Check whether previous write is complete. */
+ if (port->writing) {
+ if (HasOverlappedIoCompleted(&port->write_ovl)) {
+ DEBUG("Previous write completed");
+ port->writing = 0;
+ } else {
+ DEBUG("Previous write not complete");
+ /* Can't take a new write until the previous one finishes. */
+ RETURN_VALUE("0", 0);
+ }
+ }
+
+ /* Set timeout. */
+ port->timeouts.WriteTotalTimeoutConstant = 0;
+ if (SetCommTimeouts(port->hdl, &port->timeouts) == 0)
+ RETURN_FAIL("SetCommTimeouts() failed");
+
+ /* Keep writing data until the OS has to actually start an async IO for it.
+ * At that point we know the buffer is full. */
+ while (written < count)
+ {
+ /* Copy first byte of user buffer. */
+ port->pending_byte = *ptr++;
+
+ /* Start asynchronous write. */
+ if (WriteFile(port->hdl, &port->pending_byte, 1, NULL, &port->write_ovl) == 0) {
+ if (GetLastError() == ERROR_IO_PENDING) {
+ if (HasOverlappedIoCompleted(&port->write_ovl)) {
+ DEBUG("Asynchronous write completed immediately");
+ port->writing = 0;
+ written++;
+ continue;
+ } else {
+ DEBUG("Asynchronous write running");
+ port->writing = 1;
+ RETURN_VALUE("%d", ++written);
+ }
+ } else {
+ /* Actual failure of some kind. */
+ RETURN_FAIL("WriteFile() failed");
+ }
+ } else {
+ DEBUG("Single byte written immediately");
+ written++;
+ }
+ }
+
+ DEBUG("All bytes written immediately");
+
+ RETURN_VALUE("%d", written);
+#else
+ /* Returns the number of bytes written, or -1 upon failure. */
+ ssize_t written = write(port->fd, buf, count);
+
+ if (written < 0)
+ RETURN_FAIL("write() failed");
+ else
+ RETURN_VALUE("%d", written);
+#endif
+}
+
+enum sp_return sp_blocking_read(struct sp_port *port, void *buf, size_t count, unsigned int timeout)
+{
+ TRACE("%p, %p, %d, %d", port, buf, count, timeout);
+
+ CHECK_OPEN_PORT();
+
+ if (!buf)
+ RETURN_ERROR(SP_ERR_ARG, "Null buffer");
+
+ if (timeout)
+ DEBUG("Reading %d bytes from port %s, timeout %d ms", count, port->name, timeout);
+ else
+ DEBUG("Reading %d bytes from port %s, no timeout", count, port->name);
+
+ if (count == 0)
+ RETURN_VALUE("0", 0);
+
+#ifdef _WIN32
+ DWORD bytes_read = 0;
+
+ /* Set timeout. */
+ port->timeouts.ReadIntervalTimeout = 0;
+ port->timeouts.ReadTotalTimeoutConstant = timeout;
+ if (SetCommTimeouts(port->hdl, &port->timeouts) == 0)
+ RETURN_FAIL("SetCommTimeouts() failed");
+
+ /* Start read. */
+ if (ReadFile(port->hdl, buf, count, NULL, &port->read_ovl) == 0) {
+ if (GetLastError() == ERROR_IO_PENDING) {
+ DEBUG("Waiting for read to complete");
+ GetOverlappedResult(port->hdl, &port->read_ovl, &bytes_read, TRUE);
+ DEBUG("Read completed, %d/%d bytes read", bytes_read, count);
+ } else {
+ RETURN_FAIL("ReadFile() failed");
+ }
+ } else {
+ DEBUG("Read completed immediately");
+ bytes_read = count;
+ }
+
+ /* Start background operation for subsequent events. */
+ if (WaitCommEvent(port->hdl, &port->events, &port->wait_ovl) == 0) {
+ if (GetLastError() != ERROR_IO_PENDING)
+ RETURN_FAIL("WaitCommEvent() failed");
+ }
+
+ RETURN_VALUE("%d", bytes_read);
+
+#else
+ size_t bytes_read = 0;
+ unsigned char *ptr = (unsigned char *) buf;
+ struct timeval start, delta, now, end = {0, 0};
+ fd_set fds;
+ int result;
+
+ if (timeout) {
+ /* Get time at start of operation. */
+ gettimeofday(&start, NULL);
+ /* Define duration of timeout. */
+ delta.tv_sec = timeout / 1000;
+ delta.tv_usec = (timeout % 1000) * 1000;
+ /* Calculate time at which we should give up. */
+ timeradd(&start, &delta, &end);
+ }
+
+ /* Loop until we have the requested number of bytes. */
+ while (bytes_read < count)
+ {
+ /* Wait until data is available. */
+ FD_ZERO(&fds);
+ FD_SET(port->fd, &fds);
+ if (timeout) {
+ gettimeofday(&now, NULL);
+ if (timercmp(&now, &end, >))
+ /* Timeout has expired. */
+ RETURN_VALUE("%d", bytes_read);
+ timersub(&end, &now, &delta);
+ }
+ result = select(port->fd + 1, &fds, NULL, NULL, timeout ? &delta : NULL);
+ if (result < 0) {
+ if (errno == EINTR) {
+ DEBUG("select() call was interrupted, repeating");
+ continue;
+ } else {
+ RETURN_FAIL("select() failed");
+ }
+ } else if (result == 0) {
+ DEBUG("read timed out");
+ RETURN_VALUE("%d", bytes_read);
+ }
+
+ /* Do read. */
+ result = read(port->fd, ptr, count - bytes_read);
+
+ if (result < 0) {
+ if (errno == EAGAIN)
+ /* This shouldn't happen because we did a select() first, but handle anyway. */
+ continue;
+ else
+ /* This is an actual failure. */
+ RETURN_FAIL("read() failed");
+ }
+
+ bytes_read += result;
+ ptr += result;
+ }
+
+ RETURN_VALUE("%d", bytes_read);
+#endif
+}
+
+enum sp_return sp_nonblocking_read(struct sp_port *port, void *buf, size_t count)
+{
+ TRACE("%p, %p, %d", port, buf, count);
+
+ CHECK_OPEN_PORT();
+
+ if (!buf)
+ RETURN_ERROR(SP_ERR_ARG, "Null buffer");
+
+ DEBUG("Reading up to %d bytes from port %s", count, port->name);
+
+#ifdef _WIN32
+ DWORD bytes_read;
+
+ /* Set timeout. */
+ port->timeouts.ReadIntervalTimeout = MAXDWORD;
+ port->timeouts.ReadTotalTimeoutConstant = 0;
+ if (SetCommTimeouts(port->hdl, &port->timeouts) == 0)
+ RETURN_FAIL("SetCommTimeouts() failed");
+
+ /* Do read. */
+ if (ReadFile(port->hdl, buf, count, NULL, &port->read_ovl) == 0)
+ RETURN_FAIL("ReadFile() failed");
+
+ /* Get number of bytes read. */
+ if (GetOverlappedResult(port->hdl, &port->read_ovl, &bytes_read, TRUE) == 0)
+ RETURN_FAIL("GetOverlappedResult() failed");
+
+ if (bytes_read > 0) {
+ /* Start background operation for subsequent events. */
+ if (WaitCommEvent(port->hdl, &port->events, &port->wait_ovl) == 0) {
+ if (GetLastError() != ERROR_IO_PENDING)
+ RETURN_FAIL("WaitCommEvent() failed");
+ }
+ }
+
+ RETURN_VALUE("%d", bytes_read);
+#else
+ ssize_t bytes_read;
+
+ /* Returns the number of bytes read, or -1 upon failure. */
+ if ((bytes_read = read(port->fd, buf, count)) < 0) {
+ if (errno == EAGAIN)
+ /* No bytes available. */
+ bytes_read = 0;
+ else
+ /* This is an actual failure. */
+ RETURN_FAIL("read() failed");
+ }
+ RETURN_VALUE("%d", bytes_read);
+#endif
+}
+
+enum sp_return sp_input_waiting(struct sp_port *port)
+{
+ TRACE("%p", port);
+
+ CHECK_OPEN_PORT();
+
+ DEBUG("Checking input bytes waiting on port %s", port->name);
+
+#ifdef _WIN32
+ DWORD errors;
+ COMSTAT comstat;
+
+ if (ClearCommError(port->hdl, &errors, &comstat) == 0)
+ RETURN_FAIL("ClearCommError() failed");
+ RETURN_VALUE("%d", comstat.cbInQue);
+#else
+ int bytes_waiting;
+ if (ioctl(port->fd, TIOCINQ, &bytes_waiting) < 0)
+ RETURN_FAIL("TIOCINQ ioctl failed");
+ RETURN_VALUE("%d", bytes_waiting);
+#endif
+}
+
+enum sp_return sp_output_waiting(struct sp_port *port)
+{
+ TRACE("%p", port);
+
+ CHECK_OPEN_PORT();
+
+ DEBUG("Checking output bytes waiting on port %s", port->name);
+
+#ifdef _WIN32
+ DWORD errors;
+ COMSTAT comstat;
+
+ if (ClearCommError(port->hdl, &errors, &comstat) == 0)
+ RETURN_FAIL("ClearCommError() failed");
+ RETURN_VALUE("%d", comstat.cbOutQue);
+#else
+ int bytes_waiting;
+ if (ioctl(port->fd, TIOCOUTQ, &bytes_waiting) < 0)
+ RETURN_FAIL("TIOCOUTQ ioctl failed");
+ RETURN_VALUE("%d", bytes_waiting);
+#endif
+}
+
+enum sp_return sp_new_event_set(struct sp_event_set **result_ptr)
+{
+ struct sp_event_set *result;
+
+ TRACE("%p", result_ptr);
+
+ if (!result_ptr)
+ RETURN_ERROR(SP_ERR_ARG, "Null result");
+
+ *result_ptr = NULL;
+
+ if (!(result = malloc(sizeof(struct sp_event_set))))
+ RETURN_ERROR(SP_ERR_MEM, "sp_event_set malloc() failed");
+
+ memset(result, 0, sizeof(struct sp_event_set));
+
+ *result_ptr = result;
+
+ RETURN_OK();
+}
+
+static enum sp_return add_handle(struct sp_event_set *event_set,
+ event_handle handle, enum sp_event mask)
+{
+ void *new_handles;
+ enum sp_event *new_masks;
+
+ TRACE("%p, %d, %d", event_set, handle, mask);
+
+ if (!(new_handles = realloc(event_set->handles,
+ sizeof(event_handle) * (event_set->count + 1))))
+ RETURN_ERROR(SP_ERR_MEM, "handle array realloc() failed");
+
+ if (!(new_masks = realloc(event_set->masks,
+ sizeof(enum sp_event) * (event_set->count + 1))))
+ RETURN_ERROR(SP_ERR_MEM, "mask array realloc() failed");
+
+ event_set->handles = new_handles;
+ event_set->masks = new_masks;
+
+ ((event_handle *) event_set->handles)[event_set->count] = handle;
+ event_set->masks[event_set->count] = mask;
+
+ event_set->count++;
+
+ RETURN_OK();
+}
+
+enum sp_return sp_add_port_events(struct sp_event_set *event_set,
+ const struct sp_port *port, enum sp_event mask)
+{
+ TRACE("%p, %p, %d", event_set, port, mask);
+
+ if (!event_set)
+ RETURN_ERROR(SP_ERR_ARG, "Null event set");
+
+ if (!port)
+ RETURN_ERROR(SP_ERR_ARG, "Null port");
+
+ if (mask > (SP_EVENT_RX_READY | SP_EVENT_TX_READY | SP_EVENT_ERROR))
+ RETURN_ERROR(SP_ERR_ARG, "Invalid event mask");
+
+ if (!mask)
+ RETURN_OK();
+
+#ifdef _WIN32
+ enum sp_event handle_mask;
+ if ((handle_mask = mask & SP_EVENT_TX_READY))
+ TRY(add_handle(event_set, port->write_ovl.hEvent, handle_mask));
+ if ((handle_mask = mask & (SP_EVENT_RX_READY | SP_EVENT_ERROR)))
+ TRY(add_handle(event_set, port->wait_ovl.hEvent, handle_mask));
+#else
+ TRY(add_handle(event_set, port->fd, mask));
+#endif
+
+ RETURN_OK();
+}
+
+void sp_free_event_set(struct sp_event_set *event_set)
+{
+ TRACE("%p", event_set);
+
+ if (!event_set) {
+ DEBUG("Null event set");
+ RETURN();
+ }
+
+ DEBUG("Freeing event set");
+
+ if (event_set->handles)
+ free(event_set->handles);
+ if (event_set->masks)
+ free(event_set->masks);
+
+ free(event_set);
+
+ RETURN();
+}
+
+enum sp_return sp_wait(struct sp_event_set *event_set, unsigned int timeout)
+{
+ TRACE("%p, %d", event_set, timeout);
+
+ if (!event_set)
+ RETURN_ERROR(SP_ERR_ARG, "Null event set");
+
+#ifdef _WIN32
+ if (WaitForMultipleObjects(event_set->count, event_set->handles, FALSE,
+ timeout ? timeout : INFINITE) == WAIT_FAILED)
+ RETURN_FAIL("WaitForMultipleObjects() failed");
+
+ RETURN_OK();
+#else
+ struct timeval start, delta, now, end = {0, 0};
+ int result, timeout_remaining;
+ struct pollfd *pollfds;
+ unsigned int i;
+
+ if (!(pollfds = malloc(sizeof(struct pollfd) * event_set->count)))
+ RETURN_ERROR(SP_ERR_MEM, "pollfds malloc() failed");
+
+ for (i = 0; i < event_set->count; i++) {
+ pollfds[i].fd = ((int *) event_set->handles)[i];
+ pollfds[i].events = 0;
+ pollfds[i].revents = 0;
+ if (event_set->masks[i] & SP_EVENT_RX_READY)
+ pollfds[i].events |= POLLIN;
+ if (event_set->masks[i] & SP_EVENT_TX_READY)
+ pollfds[i].events |= POLLOUT;
+ if (event_set->masks[i] & SP_EVENT_ERROR)
+ pollfds[i].events |= POLLERR;
+ }
+
+ if (timeout) {
+ /* Get time at start of operation. */
+ gettimeofday(&start, NULL);
+ /* Define duration of timeout. */
+ delta.tv_sec = timeout / 1000;
+ delta.tv_usec = (timeout % 1000) * 1000;
+ /* Calculate time at which we should give up. */
+ timeradd(&start, &delta, &end);
+ }