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serial_enum.cpp
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serial_enum.cpp
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//*************************************************************************
// Serial port enumeration routines
//
// The EnumSerialPort function will populate an array of SSerInfo structs,
// each of which contains information about one serial port present in
// the system. Note that this code must be linked with setupapi.lib,
// which is included with the Win32 SDK.
//
// by Zach Gorman <gormanjz@hotmail.com>
//
// Copyright (c) 2002 Archetype Auction Software, Inc. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following condition is
// met: Redistributions of source code must retain the above copyright
// notice, this condition and the following disclaimer.
//
// THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED
// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
// OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL ARCHETYPE AUCTION SOFTWARE OR ITS
// AFFILIATES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
//*************************************************************************
// Copyright (c) 2003-2015 Daniel D Miller
// This version of this program is distributed by me as free software,
// under the same terms as Zach Gorman's original version;
// see the license listed above.
//
// compile with: g++ -Wall -O2 -s -DUNICODE -D_UNICODE serial_enum.cpp -o serial_enum.exe -lsetupapi
// ************************************************************************
// DDM: lessons learned:
// strFriendlyName contains Windows name/description of port
// strDevPath is the path which is used for accessing the port
// (via CreateFile, etc)
// ************************************************************************
#define STAND_ALONE 1
#include <windows.h>
#include <tchar.h>
#ifdef STAND_ALONE
#include <stdio.h>
#endif
#ifdef _lint
#include <stdlib.h> // atoi()
#endif
#include <limits.h>
#include <ctype.h>
// #include "wcommon.h"
// The following includes are needed for serial port enumeration
#include <initguid.h> // other GUIDs
#include <Setupapi.h> // SP_DEVICE_INTERFACE_DETAIL_DATA
// The following define is from ntddser.h in the DDK. It is also
// needed for serial port enumeration.
//lint -esym(765, GUID_CLASS_COMPORT, GUID_DEVINTERFACE_COMPORT)
#ifndef GUID_CLASS_COMPORT
DEFINE_GUID(GUID_CLASS_COMPORT, 0x86e0d1e0L, 0x8089, 0x11d0, 0x9c, 0xe4, 0x08, 0x00, 0x3e, 0x30, 0x1f, 0x73);
#endif
#ifndef GUID_DEVINTERFACE_COMPORT
DEFINE_GUID(GUID_DEVINTERFACE_COMPORT, 0x86E0D1E0L, 0x8089, 0x11D0, 0x9C, 0xE4, 0x08, 0x00, 0x3E, 0x30, 0x1F, 0x73);
#endif
// Struct used when enumerating the available serial ports
// Holds information about an individual serial port.
typedef struct SSerInfo_s {
struct SSerInfo_s *next ;
unsigned index ;
unsigned portnum ;
TCHAR strDevPath[PATH_MAX+1]; // Device path for use with CreateFile()
TCHAR strFriendlyName[PATH_MAX+1]; // Full name to be displayed to a user
BOOL bDeviceOpens;
BOOL bEnumerates;
} SSerInfo_t, *SSerInfo_p ;
static SSerInfo_p sp_top = 0 ;
static SSerInfo_p sp_tail ;
static unsigned port_count = 0 ;
#ifdef STAND_ALONE
//**********************************************************************
void strip_newlines(char *rstr)
{
int slen = (int) strlen(rstr) ;
while (1) {
if (slen == 0)
break;
if (*(rstr+slen-1) == '\n' || *(rstr+slen-1) == '\r') {
slen-- ;
*(rstr+slen) = 0 ;
} else {
break;
}
}
}
//*************************************************************
// each subsequent call to this function overwrites
// the previous report.
//*************************************************************
char *get_system_message(void)
{
static char msg[261] ;
// int slen ;
LPVOID lpMsgBuf;
FormatMessage(
FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
GetLastError(),
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
(LPTSTR) &lpMsgBuf,
0, 0);
// Process any inserts in lpMsgBuf.
// ...
// Display the string.
strncpy(msg, (char *) lpMsgBuf, 260) ;
// Free the buffer.
LocalFree( lpMsgBuf );
// trim the newline off the message before copying it...
strip_newlines(msg) ;
// slen = strlen(msg) ;
// if (msg[slen-1] == 10 || msg[slen-1] == 13) {
// msg[slen-1] = 0 ;
// }
return msg;
}
//********************************************************************
// On Windows platform, try to redefine printf/fprintf
// so we can output code to a debug window.
// Also, shadow syslog() within OutputDebugString()
// Note: printf() remapping was unreliable,
// but syslog worked great.
//********************************************************************
int syslog(const char *fmt, ...)
{
char consoleBuffer[3000] ;
va_list al; //lint !e522
va_start(al, fmt); //lint !e1055 !e530
vsprintf(consoleBuffer, fmt, al); //lint !e64
// if (common_logging_enabled)
// fprintf(cmlogfd, "%s", consoleBuffer) ;
puts(consoleBuffer) ;
va_end(al);
return 1;
}
#endif
//****************************************************************************
static bool port_enumerated(unsigned new_port)
{
SSerInfo_p sptemp ;
for (sptemp = sp_top; sptemp != 0; sptemp = sptemp->next) {
if (sptemp->portnum == new_port)
return true;
}
return false;
}
//****************************************************************************
void add_new_port(unsigned new_port)
{
SSerInfo_p si = new SSerInfo_t ;
memset((char *) si, 0, sizeof(SSerInfo_t)) ;
wsprintf(si->strDevPath, _T("\\\\.\\COM%u"), new_port) ;
wsprintf(si->strFriendlyName, _T("unknown device (COM%u)"), new_port) ;
si->portnum = new_port ;
si->bDeviceOpens = 1 ;
si->index = port_count++ ;
// add new struct to list
if (sp_top == 0)
sp_top = si ;
else
sp_tail->next = si ;
sp_tail = si ;
}
//****************************************************************************
void add_new_port(unsigned new_port, TCHAR *pszFriendlyName)
{
SSerInfo_p si = new SSerInfo_t ;
memset((char *) si, 0, sizeof(SSerInfo_t)) ;
// wsprintf(si->strDevPath, "COM%u", new_port) ;
wsprintf(si->strDevPath, _T("\\\\.\\COM%u"), new_port) ;
// wsprintf(si->strFriendlyName, "unknown device (COM%u)", new_port) ;
_tcscpy(si->strFriendlyName, pszFriendlyName) ;
si->portnum = new_port ;
si->bDeviceOpens = 1 ;
si->index = port_count++ ;
// add new struct to list
if (sp_top == 0)
sp_top = si ;
else
sp_tail->next = si ;
sp_tail = si ;
}
//****************************************************************************
// Eldad Kuperman 5:27 13 Apr '00
// I'm using the following code for enumeration.
// Tested succesfuly on Win98, NT and 2000. Hope it will work for you.
// No CreateFile/CloseHandle is needed.
//
// PJ Naughter 20:00 16 May '00
// Nice one. I'll update the source ASAP.
// One thing I might do is use the format "\.\COMX" instead
// of "COMx" as Windows 9x cannot handle the latter format
// for ports with a number greater than 9.
//
// DDM 07/15/09 09:39
// Well, \\.\\COMx did not work under Vista
//
//****************************************************************************
static bool comm_port_avail[256] ;
//****************************************************************************
BOOL IsPortAvailable(int nPort)
{
TCHAR szPort[15];
COMMCONFIG cc;
DWORD dwCCSize;
wsprintf(szPort, _T("COM%d"), nPort);
// Check if this port is available
dwCCSize = sizeof(cc);
return GetDefaultCommConfig(szPort, &cc, &dwCCSize);
}
//****************************************************************************
// Unlike EnumSerialPorts(), this function turns up the dialup modem,
// which isn't entirely desireable. However, it also turns up the
// Belkin USB-Serial Adapter, which the former function did not.
//****************************************************************************
void CountCommPorts(void)
{
unsigned idx ;
for (idx=0; idx<256; idx++)
comm_port_avail[idx] = false ;
// ports.RemoveAll();
for (idx = 1; idx <= 255; idx++) {
if (IsPortAvailable( idx )) {
comm_port_avail[idx] = true ;
// printf("found COM%u\n", idx) ;
// ports.Add( nPort );
if (!port_enumerated(idx))
add_new_port(idx) ;
}
}
}
//****************************************************************************
//lint -esym(714, get_serport_count)
//lint -esym(759, get_serport_count)
//lint -esym(765, get_serport_count)
unsigned get_serport_count(void)
{
return port_count;
}
//****************************************************************************
// note that 0 is not a valid COMM port number,
// so return value of 0 indicates failure.
//****************************************************************************
unsigned get_comm_num(unsigned index)
{
SSerInfo_p si ;
// printf("seeking %s\n", pszFriendlyName) ;
for (si=sp_top; si != 0; si = si->next) {
if (si->index == index)
return si->portnum;
}
return 0;
}
//****************************************************************************
int get_comm_index(unsigned port_num)
{
SSerInfo_p si ;
// printf("seeking %s\n", pszFriendlyName) ;
for (si=sp_top; si != 0; si = si->next) {
if (si->portnum == port_num)
// return si->portnum;
return si->index;
}
return 0;
}
//****************************************************************************
TCHAR *get_dev_path(unsigned port_num)
{
SSerInfo_p si ;
// printf("seeking %s\n", pszFriendlyName) ;
for (si=sp_top; si != 0; si = si->next) {
if (si->portnum == port_num)
// return si->portnum;
return si->strDevPath ;
}
return 0;
}
//****************************************************************************
TCHAR *get_disp_path(unsigned port_num)
{
SSerInfo_p si ;
// printf("seeking %s\n", pszFriendlyName) ;
for (si=sp_top; si != 0; si = si->next) {
if (si->portnum == port_num)
// return si->portnum;
return si->strFriendlyName ;
}
return 0;
}
//****************************************************************************
static bool match_port_number(TCHAR *pszFriendlyName, unsigned nPort)
{
SSerInfo_p si ;
// printf("seeking %s\n", pszFriendlyName) ;
for (si=sp_top; si != 0; si = si->next) {
// if (si->portnum != 0)
// continue;
// printf("%s=%s\n", si->strPortDesc, pszFriendlyName);
if (_tcscmp(si->strFriendlyName, pszFriendlyName) == 0) {
si->portnum = nPort ;
return true;
}
}
return false;
}
//***********************************************************************
void fill_cport_combobox(HWND hwnd, unsigned init_idx)
{
TCHAR cbentry[81] ;
SSerInfo_p sptemp ;
// unsigned j ;
// for (j=0; elements[j] != 0; j++) {
for (sptemp = sp_top; sptemp != 0; sptemp = sptemp->next) {
// printf("%s\n", sptemp->strDevPath) ;
wsprintf(cbentry, _T("COM%u: %s"), sptemp->portnum, sptemp->strFriendlyName ) ;
// wsprintf(msgstr, "adding %s\n", items[j]) ;
// OutputDebugString(msgstr) ;
LRESULT result = SendMessage(hwnd, CB_ADDSTRING, 0, (LPARAM) cbentry);
switch (result) {
case CB_ERR:
syslog("CB_ADDSTRING: CB_ERR: %s\n", get_system_message()) ;
break;
case CB_ERRSPACE:
syslog("CB_ADDSTRING: CB_ERRSPACE: %s\n", get_system_message()) ;
break;
default:
// wsprintf(msgstr, "CB_ADDSTRING returned %u\n", result) ;
// OutputDebugString(msgstr) ;
break;
}
}
SendMessage(hwnd, CB_SETCURSEL, (WPARAM) init_idx, 0);
}
//****************************************************************************
BOOL IsNumeric(LPCTSTR pszString, BOOL bIgnoreColon)
{
size_t nLen = _tcslen(pszString);
if (nLen == 0)
return FALSE;
//Assume the best
BOOL bNumeric = TRUE;
for (size_t i=0; i<nLen && bNumeric; i++)
{
bNumeric = (_istdigit(pszString[i]) != 0);
if (bIgnoreColon && (pszString[i] == _T(':')))
bNumeric = TRUE;
}
return bNumeric;
}
//****************************************************************************
// from: http://www.naughter.com/enumser.html
//****************************************************************************
// BOOL UsingSetupAPI2(unsigned *ports)
BOOL UsingSetupAPI2(void)
{
//First need to convert the name "Ports" to a GUID using SetupDiClassGuidsFromName
DWORD dwGuids = 0;
// lpfnSETUPDICLASSGUIDSFROMNAME(_T("Ports"), NULL, 0, &dwGuids);
SetupDiClassGuidsFromName(_T("Ports"), NULL, 0, &dwGuids) ;
if (dwGuids == 0) {
printf("SetupDiClassGuidsFromName (init): %s\n", get_system_message()) ;
return FALSE;
}
// printf("guids=%u\n", (unsigned) dwGuids) ;
//Allocate the needed memory
GUID *pGuids = new GUID[dwGuids] ;
// ATL::CHeapPtr<GUID> pGuids;
// if (!pGuids.Allocate(dwGuids))
if (pGuids == NULL) {
SetLastError(ERROR_OUTOFMEMORY);
puts("Out Of Memory") ;
return FALSE;
}
//Call the function again
if (!SetupDiClassGuidsFromName(_T("Ports"), pGuids, dwGuids, &dwGuids)) {
printf("SetupDiClassGuidsFromName (read): %s\n", get_system_message()) ;
return FALSE;
}
//Now create a "device information set" which is required to enumerate all the ports
HDEVINFO hDevInfoSet = SetupDiGetClassDevs(pGuids, NULL, NULL, DIGCF_PRESENT);
if (hDevInfoSet == INVALID_HANDLE_VALUE) {
printf("SetupDiGetClassDevs: %s\n", get_system_message()) ;
return FALSE;
}
//Finally do the enumeration
BOOL bMoreItems = TRUE;
int nIndex = 0;
SP_DEVINFO_DATA devInfo;
while (bMoreItems)
{
//Enumerate the current device
devInfo.cbSize = sizeof(SP_DEVINFO_DATA);
// bMoreItems = lpfnSETUPDIENUMDEVICEINFO(hDevInfoSet, nIndex, &devInfo);
bMoreItems = SetupDiEnumDeviceInfo(hDevInfoSet, nIndex, &devInfo);
if (bMoreItems)
{
//Did we find a serial port for this device
BOOL bAdded = FALSE;
unsigned nPort = 0 ;
//Get the registry key which stores the ports settings
HKEY hDeviceKey = SetupDiOpenDevRegKey(hDevInfoSet, &devInfo, DICS_FLAG_GLOBAL, 0, DIREG_DEV, KEY_QUERY_VALUE);
if (hDeviceKey)
{
//Read in the name of the port
TCHAR pszPortName[256];
DWORD dwSize = sizeof(pszPortName);
DWORD dwType = 0;
if ((RegQueryValueEx(hDeviceKey, _T("PortName"), NULL, &dwType, reinterpret_cast<LPBYTE>(pszPortName), &dwSize) == ERROR_SUCCESS) && (dwType == REG_SZ))
{
//If it looks like "COMX" then
//add it to the array which will be returned
size_t nLen = _tcslen(pszPortName);
if (nLen > 3)
{
if ((_tcsnicmp(pszPortName, _T("COM"), 3) == 0) && IsNumeric(&pszPortName[3], FALSE))
{
//Work out the port number
nPort = _ttoi(&pszPortName[3]);
// ports.Add(nPort);
// printf("add port %u\n", nPort) ;
bAdded = TRUE;
}
}
}
//Close the key now that we are finished with it
RegCloseKey(hDeviceKey);
}
//If the port was a serial port, then also try to get its friendly name
if (bAdded)
{
TCHAR pszFriendlyName[256];
DWORD dwSize = sizeof(pszFriendlyName);
DWORD dwType = 0;
// if (lpfnSETUPDIGETDEVICEREGISTRYPROPERTY(hDevInfoSet, &devInfo, SPDRP_DEVICEDESC,
// &dwType, reinterpret_cast<PBYTE>(pszFriendlyName), dwSize, &dwSize) && (dwType == REG_SZ))
// sFriendlyNames.Add(pszFriendlyName);
// else
// sFriendlyNames.Add(_T(""));
if (SetupDiGetDeviceRegistryProperty(hDevInfoSet, &devInfo, SPDRP_FRIENDLYNAME, &dwType,
(PBYTE) pszFriendlyName, dwSize, &dwSize) && (dwType == REG_SZ))
{
// printf("found port %u, %s\n", nPort, pszFriendlyName) ;
if (!match_port_number(pszFriendlyName, nPort))
add_new_port(nPort, pszFriendlyName) ;
}
else {
// sFriendlyNames.Add(_T(""));
// strncpy(si->strFriendlyName, "no name", PATH_MAX) ;
printf("did NOT found port %u\n", nPort) ;
}
}
}
++nIndex;
}
//Free up the "device information set" now that we are finished with it
SetupDiDestroyDeviceInfoList(hDevInfoSet);
//Unload the setup dll
// FreeLibrary(hSetupAPI);
//Return the success indicator
return TRUE;
}
//****************************************************************************
// Enumerate serial ports on Windows XP
// from: http://www.naughter.com/enumser.html
//****************************************************************************
// This was originally enumerating all of the serial ports,
// but it was not providing the path for opening them!!
// Now, I'm going to use the SPDRP_DEVICEDESC from each method
// to merge the two together and add the COMn port number to our data.
//****************************************************************************
static BOOL UsingSetupAPI1(void)
{
// char errstr[128] ;
//Make sure we clear out any elements which may already be in the array(s)
// ports.RemoveAll();
// sFriendlyNames.RemoveAll();
//Now create a "device information set" which is required to enumerate all the ports
GUID guid = GUID_DEVINTERFACE_COMPORT;
HDEVINFO hDevInfoSet = SetupDiGetClassDevs(&guid, NULL, NULL, DIGCF_PRESENT | DIGCF_DEVICEINTERFACE);
if (hDevInfoSet == INVALID_HANDLE_VALUE) {
syslog("SetupDiGetClassDevs: %s\n", get_system_message()) ;
return FALSE;
}
//Finally do the enumeration
BOOL bMoreItems = TRUE;
int nIndex = 0;
SP_DEVINFO_DATA devInfo;
while (bMoreItems) {
//Enumerate the current device
devInfo.cbSize = sizeof(SP_DEVINFO_DATA);
bMoreItems = SetupDiEnumDeviceInfo(hDevInfoSet, nIndex, &devInfo);
if (bMoreItems) {
//************************************************************************
// initially, this process will not attempt to be rigorously clean;
// i.e., if any of the reads fail, it will not clean up the temp data.
// Later, in production code, we'll clean this up.
//************************************************************************
// SSerInfo_p si = new SSerInfo_t ;
// memset((char *) si, 0, sizeof(SSerInfo_t)) ;
//Did we find a serial port for this device
BOOL bAdded = FALSE;
unsigned nPort = 0 ;
//Get the registry key which stores the ports settings
HKEY hDeviceKey = SetupDiOpenDevRegKey(hDevInfoSet, &devInfo, DICS_FLAG_GLOBAL, 0, DIREG_DEV, KEY_QUERY_VALUE);
if (hDeviceKey) {
//Read in the name of the port
TCHAR pszPortName[256];
DWORD dwSize = sizeof(pszPortName);
DWORD dwType = 0;
if ((RegQueryValueEx(hDeviceKey, _T("PortName"), NULL, &dwType,
reinterpret_cast<LPBYTE>(pszPortName), &dwSize) == ERROR_SUCCESS) &&
(dwType == REG_SZ)) {
//If it looks like "COMX" then
//add it to the array which will be returned
size_t nLen = lstrlen(pszPortName);
if (nLen > 3) {
if ((_tcsnicmp(pszPortName, _T("COM"), 3) == 0) &&
pszPortName[3] >= '0' &&
pszPortName[3] <= '9')
// IsNumeric(&pszPortName[3], FALSE))
{
//Work out the port number
nPort = _ttoi(&pszPortName[3]);
// nPort = atoi(&pszPortName[3]);
// printf("found port %u\n", nPort) ;
// ports.Add(nPort);
// si->portnum = nPort ;
bAdded = TRUE;
}
}
}
//Close the key now that we are finished with it
RegCloseKey(hDeviceKey);
}
//If the port was a serial port, then also try to get its friendly name
if (bAdded) {
TCHAR pszFriendlyName[256];
DWORD dwSize = sizeof(pszFriendlyName);
DWORD dwType = 0;
if (SetupDiGetDeviceRegistryProperty(hDevInfoSet, &devInfo, SPDRP_FRIENDLYNAME, &dwType, (PBYTE) pszFriendlyName, dwSize, &dwSize) && (dwType == REG_SZ))
// sFriendlyNames.Add(pszFriendlyName);
// strncpy(si->strFriendlyName, pszFriendlyName, PATH_MAX) ;
{
// printf("\nfound port %u, %s\n", nPort, pszFriendlyName) ;
match_port_number(pszFriendlyName, nPort) ;
}
else {
// sFriendlyNames.Add(_T(""));
// strncpy(si->strFriendlyName, "no name", PATH_MAX) ;
}
}
} // if device info acquired
else {
// wsprintf(errstr, "index %d: SetupDiEnumDeviceInfo: %s\n", nIndex, get_system_message()) ;
// OutputDebugString(errstr) ;
}
++nIndex;
}
//Free up the "device information set" now that we are finished with it
SetupDiDestroyDeviceInfoList(hDevInfoSet);
//Return the success indicator
return TRUE;
}
//****************************************************************************
// Dig port data out of the registry
//****************************************************************************
static BOOL EnumPortsWdm(void)
{
BOOL bOk ;
SP_DEVICE_INTERFACE_DATA ifcData;
DWORD dwDetDataSize ;
// Create a device information set that will be the container for
// the device interfaces.
GUID *guidDev = (GUID*) &GUID_CLASS_COMPORT;
SP_DEVICE_INTERFACE_DETAIL_DATA *pDetData = NULL;
HDEVINFO hDevInfo = SetupDiGetClassDevs( guidDev,
NULL,
NULL,
DIGCF_PRESENT | DIGCF_DEVICEINTERFACE
);
if(hDevInfo == INVALID_HANDLE_VALUE) {
syslog("SetupDiGetClassDevs: %s\n", get_system_message()) ;
goto error_exit;
}
// Enumerate the serial ports
bOk = TRUE;
dwDetDataSize = sizeof(SP_DEVICE_INTERFACE_DETAIL_DATA) + 256;
pDetData = (SP_DEVICE_INTERFACE_DETAIL_DATA*) new char[dwDetDataSize];
// This is required, according to the documentation. Yes, it's weird.
ifcData.cbSize = sizeof(SP_DEVICE_INTERFACE_DATA);
pDetData->cbSize = sizeof(SP_DEVICE_INTERFACE_DETAIL_DATA);
for (DWORD ii=0; bOk; ii++) {
bOk = SetupDiEnumDeviceInterfaces(hDevInfo,
NULL, guidDev, ii, &ifcData);
if (bOk) {
// Got a device. Get the details.
SP_DEVINFO_DATA devdata = {sizeof(SP_DEVINFO_DATA)}; //lint !e785
bOk = SetupDiGetDeviceInterfaceDetail(hDevInfo,
&ifcData, pDetData, dwDetDataSize, NULL, &devdata);
if (bOk) {
// allocate initial struct
SSerInfo_p si = new SSerInfo_t ;
memset((char *) si, 0, sizeof(SSerInfo_t)) ;
// strncpy(si->strDevPath, pDetData->DevicePath, PATH_MAX);
lstrcpyn(si->strDevPath, pDetData->DevicePath, PATH_MAX);
// Got a path to the device. Try to get some more info.
BOOL bSuccess = SetupDiGetDeviceRegistryProperty(hDevInfo, &devdata,
SPDRP_FRIENDLYNAME, NULL, (PBYTE) si->strFriendlyName, PATH_MAX, NULL);
si->bEnumerates = true ;
// SPDRP_DEVICEDESC is subset of SPDRP_FRIENDLYNAME
// bSuccess = bSuccess && SetupDiGetDeviceRegistryProperty(
// hDevInfo, &devdata, SPDRP_DEVICEDESC, NULL,
// (PBYTE)desc, sizeof(desc), NULL);
// BOOL bUsbDevice = FALSE;
// TCHAR locinfo[256];
// if (SetupDiGetDeviceRegistryProperty(
// hDevInfo, &devdata, SPDRP_LOCATION_INFORMATION, NULL,
// (PBYTE)locinfo, sizeof(locinfo), NULL))
// {
// // Just check the first three characters to determine
// // if the port is connected to the USB bus. This isn't
// // an infallible method; it would be better to use the BUS GUID.
// // Currently, Windows doesn't let you query that though
// // (SPDRP_BUSTYPEGUID seems to exist in documentation only).
// //
// // DDM note: and, in fact, this fails to recognize that my
// // Olimex USB JTAG device is a USB device.
// bUsbDevice = (strncmp(locinfo, "USB", 3)==0);
// }
if (bSuccess) {
si->index = port_count++ ;
// add new struct to list
if (sp_top == 0)
sp_top = si ;
else
sp_tail->next = si ;
sp_tail = si ;
}
}
else {
// strErr.Format("SetupDiGetDeviceInterfaceDetail failed. (err=%lx)",
// GetLastError());
// throw strErr;
syslog("SetupDiGetDeviceInterfaceDetail: %s\n", get_system_message()) ;
goto error_exit;
}
}
else {
DWORD err = GetLastError();
if (err != ERROR_NO_MORE_ITEMS) {
// strErr.Format("SetupDiEnumDeviceInterfaces failed. (err=%lx)", err);
// throw strErr;
syslog("SetupDiEnumDeviceInterfaces: %s\n", get_system_message()) ;
goto error_exit;
}
}
}
if (pDetData != NULL) //lint !e774
delete [] (char*)pDetData;
if (hDevInfo != INVALID_HANDLE_VALUE)
SetupDiDestroyDeviceInfoList(hDevInfo);
// if (!strErr.IsEmpty())
// throw strErr;
return TRUE ;
error_exit:
if (pDetData != NULL) //lint !e774
delete [] (char*)pDetData;
if (hDevInfo != INVALID_HANDLE_VALUE)
SetupDiDestroyDeviceInfoList(hDevInfo);
return FALSE;
}
//****************************************************************************
// Routine for enumerating the available serial ports.
// Throws a CString on failure, describing the error that
// occurred. If bIgnoreBusyPorts is TRUE, ports that can't
// be opened for read/write access are not included.
//****************************************************************************
// void EnumSerialPorts(SSerInfo_p asi)
void EnumSerialPorts(void)
{
// Clear the output array
// asi.RemoveAll();
// Use different techniques to enumerate the available serial
// ports, depending on the OS we're using
OSVERSIONINFO vi;
vi.dwOSVersionInfoSize = sizeof(vi);
if (!GetVersionEx(&vi)) {
syslog("Could not get OS version. (err=%lx)\n", GetLastError());
goto build_compatibility_mode;
}
// Handle windows 9x and NT4 specially
if (vi.dwMajorVersion < 5) {
if (vi.dwPlatformId == VER_PLATFORM_WIN32_NT)
syslog("This function does not support WinNT4\n") ;
else
syslog("This function does not support Win9x\n") ;
goto build_compatibility_mode;
}
// Win2k and later support a standard API for
// enumerating hardware devices.
// if (!EnumPortsWdm(asi))
// goto build_compatibility_mode;
EnumPortsWdm() ;
// if (!EnumPortsWdm())
// goto build_compatibility_mode;
// find COMM port number for each entry
// UsingSetupAPI1();
// unsigned ports[256] ;
// UsingSetupAPI2(&ports[0]);
UsingSetupAPI2();
// 01/01/15 - move this test until after *both* of the previous functions
// have been run. They search different parts of the registry.
if (sp_top == 0)
goto build_compatibility_mode;
// look for other ports which do not enumerate
// CountCommPorts() ;
// test each port to see if it will enumerate
SSerInfo_p rsi ;
for (rsi = sp_top; rsi != 0; rsi = rsi->next) {
// Only display ports that can be opened for read/write
HANDLE hCom = CreateFile(rsi->strDevPath,
GENERIC_READ | GENERIC_WRITE,
0, /* comm devices must be opened w/exclusive-access */
NULL, /* no security attrs */
OPEN_EXISTING, /* comm devices must use OPEN_EXISTING */
0, /* not overlapped I/O */
NULL /* hTemplate must be NULL for comm devices */
);
if (hCom == INVALID_HANDLE_VALUE) {
// It can't be opened; remove it.
// asi.RemoveAt(ii); // this is *one* thing that's not easy here
// ii--;
// printf("cannot open %s\n", rsi->strDevPath) ;
// continue;
}
else {
rsi->bDeviceOpens = TRUE ;
// It can be opened! Close it and add it to the list
CloseHandle(hCom);
}
}
return ;
build_compatibility_mode:
syslog("no serial ports found...\n");
// compatibility backup
// if (sp_top == 0) {
// syslog("building default serial-port list\n") ;
// unsigned j ;
// for (j=1; j<=4; j++) {
// add_new_port(j) ;
// }
// }
}
//****************************************************************************
#define MAX_UNICODE_LEN 1024
char *unicode2ascii(WCHAR *UnicodeStr)
{
static char AsciiStr[MAX_UNICODE_LEN+1] ;
WideCharToMultiByte(CP_ACP, 0, UnicodeStr, -1, AsciiStr, MAX_UNICODE_LEN, NULL, NULL);
return AsciiStr ;
}
//****************************************************************************
static void usage(void)
{
puts("Usage: serial_enum [-d]");
puts("Option -d displays device name, as well as other data.");
}
//****************************************************************************
#ifdef STAND_ALONE
int main(int argc, char **argv)
{
bool show_device_name = false ;
// parse command line
int idx ;
for (idx=1; idx<argc; idx++) {
char *p = argv[idx];
if (*p == '-' || *p == '/') {
p++ ;
switch (*p) {
case 'd':
show_device_name = true ;
break ;
default :
usage() ;
return 1 ;
}
} else {
usage() ;
return 1 ;
}
}
// Populate the list of serial ports.
EnumSerialPorts();
// printf("found %u ports\n", port_count) ;
SSerInfo_p sptemp ;
printf("Port Opens Enums Device description\n") ;
printf("===== ===== ===== ============================\n") ;
for (sptemp = sp_top; sptemp != 0; sptemp = sptemp->next) {
printf("COM%-2u %-3s %-3s %s\n",
sptemp->portnum,
(sptemp->bDeviceOpens) ? "YES" : "no",
(sptemp->bEnumerates) ? "YES" : "no",
unicode2ascii(sptemp->strFriendlyName)
) ;
if (show_device_name)
printf(" %s\n", unicode2ascii(sptemp->strDevPath)) ;
}
return 0;
}
#endif