Add missing wReserved1 member to DCB structure definition.
Fix several bugs in BuildCommDCBAndTimeouts: - make sure LPCSTR parameter is really treated as constant - fix possible buffer overflow if passed in string is too long - if the device control string is invalid, do not modify DCB - do not clear entire DCB, only modify appropriate members - fix parsing of stop bits parameter so it works for 1 and 1.5 - populate COMMTIMEOUTS when to=xxx parameter is specified - added support for xon, odsr, octs, dtr, rts, and idsr parameters - fix several other parsing errors
This commit is contained in:
Kevin Groeneveld
Alexandre Julliard
parent
fc7e8f5c7b
commit
8be51c92e4
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@ -155,135 +155,350 @@ static int COMM_WhackModem(int fd, unsigned int andy, unsigned int orrie)
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#endif
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#endif
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}
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}
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/***********************************************************************
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* COMM_Parse* (Internal)
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*
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* The following COMM_Parse* functions are used by the BuildCommDCB
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* functions to help parse the various parts of the device control string.
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*/
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static LPCSTR COMM_ParseStart(LPCSTR ptr)
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{
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/* The device control string may optionally start with "COMx" followed
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by an optional ':' and spaces. */
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if(!strncasecmp(ptr, "COM", 3))
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{
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ptr += 3;
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/* Allow any com port above 0 as Win 9x does (NT only allows
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values for com ports which are actually present) */
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if(*ptr < '1' || *ptr > '9')
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return NULL;
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/* Advance pointer past port number */
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while(*ptr >= '0' && *ptr <= '9') ptr++;
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/* The com port number must be followed by a ':' or ' ' */
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if(*ptr != ':' && *ptr != ' ')
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return NULL;
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/* Advance pointer to beginning of next parameter */
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while(*ptr == ' ') ptr++;
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if(*ptr == ':')
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{
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ptr++;
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while(*ptr == ' ') ptr++;
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}
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}
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/* The device control string must not start with a space. */
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else if(*ptr == ' ')
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return NULL;
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return ptr;
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}
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static LPCSTR COMM_ParseNumber(LPCSTR ptr, LPDWORD lpnumber)
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{
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if(*ptr < '0' || *ptr > '9') return NULL;
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if(!sscanf(ptr, "%ld", lpnumber)) return NULL;
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while(*ptr >= '0' && *ptr <= '9') ptr++;
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return ptr;
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}
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static LPCSTR COMM_ParseParity(LPCSTR ptr, LPBYTE lpparity)
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{
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/* Contrary to what you might expect, Windows only sets the Parity
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member of DCB and not fParity even when parity is specified in the
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device control string */
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switch(toupper(*ptr++))
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{
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case 'E':
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*lpparity = EVENPARITY;
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break;
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case 'M':
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*lpparity = MARKPARITY;
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break;
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case 'N':
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*lpparity = NOPARITY;
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break;
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case 'O':
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*lpparity = ODDPARITY;
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break;
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case 'S':
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*lpparity = SPACEPARITY;
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break;
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default:
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return NULL;
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}
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return ptr;
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}
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static LPCSTR COMM_ParseByteSize(LPCSTR ptr, LPBYTE lpbytesize)
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{
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DWORD temp;
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if(!(ptr = COMM_ParseNumber(ptr, &temp)))
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return NULL;
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if(temp >= 5 && temp <= 8)
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{
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*lpbytesize = temp;
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return ptr;
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}
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else
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return NULL;
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}
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static LPCSTR COMM_ParseStopBits(LPCSTR ptr, LPBYTE lpstopbits)
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{
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DWORD temp;
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if(!strncmp("1.5", ptr, 3))
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{
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ptr += 3;
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*lpstopbits = ONE5STOPBITS;
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}
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else
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{
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if(!(ptr = COMM_ParseNumber(ptr, &temp)))
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return NULL;
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if(temp == 1)
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*lpstopbits = ONESTOPBIT;
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else if(temp == 2)
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*lpstopbits = TWOSTOPBITS;
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else
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return NULL;
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}
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return ptr;
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}
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static LPCSTR COMM_ParseOnOff(LPCSTR ptr, LPDWORD lponoff)
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{
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if(!strncasecmp("on", ptr, 2))
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{
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ptr += 2;
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*lponoff = 1;
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}
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else if(!strncasecmp("off", ptr, 3))
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{
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ptr += 3;
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*lponoff = 0;
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}
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else
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return NULL;
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return ptr;
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}
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/***********************************************************************
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/***********************************************************************
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* COMM_BuildOldCommDCB (Internal)
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* COMM_BuildOldCommDCB (Internal)
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*
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*
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* Build a DCB using the old style settings string eg: "COMx:96,n,8,1"
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* Build a DCB using the old style settings string eg: "96,n,8,1"
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* We ignore the COM port index, since we can support more than 4 ports.
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*/
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*/
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BOOL WINAPI COMM_BuildOldCommDCB(LPCSTR device, LPDCB lpdcb)
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static BOOL COMM_BuildOldCommDCB(LPCSTR device, LPDCB lpdcb)
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{
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{
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/* "COM1:96,n,8,1" */
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char last = 0;
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/* 012345 */
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char *ptr, temp[256], last;
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int rate;
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TRACE("(%s), ptr %p\n", device, lpdcb);
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if(!(device = COMM_ParseNumber(device, &lpdcb->BaudRate)))
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return FALSE;
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/* Some applications call this function with "9600,n,8,1"
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switch(lpdcb->BaudRate)
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* not sending the "COM1:" parameter at left of string */
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if (!strncasecmp(device,"COM",3))
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{
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if (!device[3]) return FALSE;
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if (device[4] != ':' && device[4] != ' ') return FALSE;
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strcpy(temp,device+5);
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}
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else strcpy(temp,device);
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last=temp[strlen(temp)-1];
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ptr = strtok(temp, ", ");
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/* DOS/Windows only compares the first two numbers
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* and assigns an appropriate baud rate.
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* You can supply 961324245, it still returns 9600 ! */
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if (strlen(ptr) < 2)
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{
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{
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WARN("Unknown baudrate string '%s' !\n", ptr);
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return FALSE; /* error: less than 2 chars */
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}
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ptr[2] = '\0';
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rate = atoi(ptr);
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switch (rate) {
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case 11:
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case 11:
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case 30:
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case 30:
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case 60:
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case 60:
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rate *= 10;
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lpdcb->BaudRate *= 10;
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break;
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break;
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case 12:
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case 12:
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case 24:
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case 24:
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case 48:
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case 48:
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case 96:
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case 96:
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rate *= 100;
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lpdcb->BaudRate *= 100;
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break;
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break;
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case 19:
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case 19:
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rate = 19200;
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lpdcb->BaudRate = 19200;
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break;
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}
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while(*device == ' ') device++;
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if(*device++ != ',') return FALSE;
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while(*device == ' ') device++;
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if(!(device = COMM_ParseParity(device, &lpdcb->Parity)))
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return FALSE;
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while(*device == ' ') device++;
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if(*device++ != ',') return FALSE;
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while(*device == ' ') device++;
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if(!(device = COMM_ParseByteSize(device, &lpdcb->ByteSize)))
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return FALSE;
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while(*device == ' ') device++;
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if(*device++ != ',') return FALSE;
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while(*device == ' ') device++;
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if(!(device = COMM_ParseStopBits(device, &lpdcb->StopBits)))
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return FALSE;
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/* The last parameter for flow control is optional. */
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while(*device == ' ') device++;
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if(*device == ',')
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{
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device++;
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while(*device == ' ') device++;
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if(*device) last = toupper(*device++);
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while(*device == ' ') device++;
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}
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switch(last)
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{
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case 0:
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lpdcb->fInX = FALSE;
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lpdcb->fOutX = FALSE;
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lpdcb->fOutxCtsFlow = FALSE;
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lpdcb->fOutxDsrFlow = FALSE;
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lpdcb->fDtrControl = DTR_CONTROL_ENABLE;
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lpdcb->fRtsControl = RTS_CONTROL_ENABLE;
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break;
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case 'X':
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lpdcb->fInX = TRUE;
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lpdcb->fOutX = TRUE;
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lpdcb->fOutxCtsFlow = FALSE;
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lpdcb->fOutxDsrFlow = FALSE;
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lpdcb->fDtrControl = DTR_CONTROL_ENABLE;
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lpdcb->fRtsControl = RTS_CONTROL_ENABLE;
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break;
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case 'P':
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lpdcb->fInX = FALSE;
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lpdcb->fOutX = FALSE;
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lpdcb->fOutxCtsFlow = TRUE;
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lpdcb->fOutxDsrFlow = TRUE;
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lpdcb->fDtrControl = DTR_CONTROL_HANDSHAKE;
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lpdcb->fRtsControl = RTS_CONTROL_HANDSHAKE;
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break;
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break;
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default:
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default:
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WARN("Unknown baudrate indicator %d !\n", rate);
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return FALSE;
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return FALSE;
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}
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}
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lpdcb->BaudRate = rate;
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/* This should be the end of the string. */
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TRACE("baudrate (%ld)\n", lpdcb->BaudRate);
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if(*device) return FALSE;
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ptr = strtok(NULL, ", ");
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return TRUE;
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if (islower(*ptr))
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}
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*ptr = toupper(*ptr);
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TRACE("parity (%c)\n", *ptr);
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/***********************************************************************
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lpdcb->fParity = TRUE;
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* COMM_BuildNewCommDCB (Internal)
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switch (*ptr) {
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*
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case 'N':
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* Build a DCB using the new style settings string.
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lpdcb->Parity = NOPARITY;
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* eg: "baud=9600 parity=n data=8 stop=1 xon=on to=on"
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lpdcb->fParity = FALSE;
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*/
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break;
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static BOOL COMM_BuildNewCommDCB(LPCSTR device, LPDCB lpdcb, LPCOMMTIMEOUTS lptimeouts)
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case 'E':
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{
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lpdcb->Parity = EVENPARITY;
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DWORD temp;
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break;
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BOOL baud = FALSE, stop = FALSE;
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case 'M':
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lpdcb->Parity = MARKPARITY;
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while(*device)
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break;
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{
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case 'O':
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while(*device == ' ') device++;
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lpdcb->Parity = ODDPARITY;
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break;
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if(!strncasecmp("baud=", device, 5))
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case 'S':
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{
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lpdcb->Parity = SPACEPARITY;
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baud = TRUE;
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break;
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default:
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if(!(device = COMM_ParseNumber(device + 5, &lpdcb->BaudRate)))
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WARN("Unknown parity `%c'!\n", *ptr);
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return FALSE;
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return FALSE;
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}
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else if(!strncasecmp("parity=", device, 7))
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{
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if(!(device = COMM_ParseParity(device + 7, &lpdcb->Parity)))
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return FALSE;
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}
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else if(!strncasecmp("data=", device, 5))
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{
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if(!(device = COMM_ParseByteSize(device + 5, &lpdcb->ByteSize)))
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return FALSE;
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}
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else if(!strncasecmp("stop=", device, 5))
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{
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stop = TRUE;
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if(!(device = COMM_ParseStopBits(device + 5, &lpdcb->StopBits)))
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return FALSE;
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}
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else if(!strncasecmp("to=", device, 3))
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{
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if(!(device = COMM_ParseOnOff(device + 3, &temp)))
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return FALSE;
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lptimeouts->ReadIntervalTimeout = 0;
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lptimeouts->ReadTotalTimeoutMultiplier = 0;
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lptimeouts->ReadTotalTimeoutConstant = 0;
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lptimeouts->WriteTotalTimeoutMultiplier = 0;
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lptimeouts->WriteTotalTimeoutConstant = temp ? 60000 : 0;
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}
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else if(!strncasecmp("xon=", device, 4))
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{
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if(!(device = COMM_ParseOnOff(device + 4, &temp)))
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return FALSE;
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lpdcb->fOutX = temp;
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lpdcb->fInX = temp;
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}
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else if(!strncasecmp("odsr=", device, 5))
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{
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if(!(device = COMM_ParseOnOff(device + 5, &temp)))
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return FALSE;
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lpdcb->fOutxDsrFlow = temp;
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}
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else if(!strncasecmp("octs=", device, 5))
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{
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if(!(device = COMM_ParseOnOff(device + 5, &temp)))
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return FALSE;
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lpdcb->fOutxCtsFlow = temp;
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}
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else if(!strncasecmp("dtr=", device, 4))
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{
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if(!(device = COMM_ParseOnOff(device + 4, &temp)))
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return FALSE;
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lpdcb->fDtrControl = temp;
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}
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else if(!strncasecmp("rts=", device, 4))
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{
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if(!(device = COMM_ParseOnOff(device + 4, &temp)))
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return FALSE;
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lpdcb->fRtsControl = temp;
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}
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else if(!strncasecmp("idsr=", device, 5))
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{
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if(!(device = COMM_ParseOnOff(device + 5, &temp)))
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return FALSE;
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lpdcb->fDsrSensitivity = temp;
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}
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else
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return FALSE;
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/* After the above parsing, the next character (if not the end of
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the string) should be a space */
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if(*device && *device != ' ')
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return FALSE;
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}
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}
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ptr = strtok(NULL, ", ");
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/* If stop bits were not specified, a default is always supplied. */
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TRACE("charsize (%c)\n", *ptr);
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if(!stop)
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lpdcb->ByteSize = *ptr - '0';
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{
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if(baud && lpdcb->BaudRate == 110)
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ptr = strtok(NULL, ", ");
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lpdcb->StopBits = TWOSTOPBITS;
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TRACE("stopbits (%c)\n", *ptr);
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else
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switch (*ptr) {
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lpdcb->StopBits = ONESTOPBIT;
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case '1':
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lpdcb->StopBits = ONESTOPBIT;
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break;
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case '2':
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lpdcb->StopBits = TWOSTOPBITS;
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break;
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default:
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||||||
WARN("Unknown # of stopbits `%c'!\n", *ptr);
|
|
||||||
return FALSE;
|
|
||||||
}
|
|
||||||
|
|
||||||
if (last == 'x') {
|
|
||||||
lpdcb->fInX = TRUE;
|
|
||||||
lpdcb->fOutX = TRUE;
|
|
||||||
lpdcb->fOutxCtsFlow = FALSE;
|
|
||||||
lpdcb->fOutxDsrFlow = FALSE;
|
|
||||||
lpdcb->fDtrControl = DTR_CONTROL_ENABLE;
|
|
||||||
lpdcb->fRtsControl = RTS_CONTROL_ENABLE;
|
|
||||||
} else if (last=='p') {
|
|
||||||
lpdcb->fInX = FALSE;
|
|
||||||
lpdcb->fOutX = FALSE;
|
|
||||||
lpdcb->fOutxCtsFlow = TRUE;
|
|
||||||
lpdcb->fOutxDsrFlow = FALSE;
|
|
||||||
lpdcb->fDtrControl = DTR_CONTROL_ENABLE;
|
|
||||||
lpdcb->fRtsControl = RTS_CONTROL_HANDSHAKE;
|
|
||||||
} else {
|
|
||||||
lpdcb->fInX = FALSE;
|
|
||||||
lpdcb->fOutX = FALSE;
|
|
||||||
lpdcb->fOutxCtsFlow = FALSE;
|
|
||||||
lpdcb->fOutxDsrFlow = FALSE;
|
|
||||||
lpdcb->fDtrControl = DTR_CONTROL_ENABLE;
|
|
||||||
lpdcb->fRtsControl = RTS_CONTROL_ENABLE;
|
|
||||||
}
|
}
|
||||||
|
|
||||||
return TRUE;
|
return TRUE;
|
||||||
|
|
@ -321,83 +536,45 @@ BOOL WINAPI BuildCommDCBA(
|
||||||
BOOL WINAPI BuildCommDCBAndTimeoutsA(
|
BOOL WINAPI BuildCommDCBAndTimeoutsA(
|
||||||
LPCSTR device, /* [in] The ascii device control string. */
|
LPCSTR device, /* [in] The ascii device control string. */
|
||||||
LPDCB lpdcb, /* [out] The device control block to be updated. */
|
LPDCB lpdcb, /* [out] The device control block to be updated. */
|
||||||
LPCOMMTIMEOUTS lptimeouts) /* [in] The timeouts to use if asked to set them by the control string. */
|
LPCOMMTIMEOUTS lptimeouts) /* [in] The COMMTIMEOUTS structure to be updated. */
|
||||||
{
|
{
|
||||||
int port;
|
DCB dcb;
|
||||||
char *ptr,*temp;
|
COMMTIMEOUTS timeouts;
|
||||||
|
BOOL result;
|
||||||
|
LPCSTR ptr = device;
|
||||||
|
|
||||||
TRACE("(%s,%p,%p)\n",device,lpdcb,lptimeouts);
|
TRACE("(%s,%p,%p)\n",device,lpdcb,lptimeouts);
|
||||||
|
|
||||||
if (!strncasecmp(device,"COM",3)) {
|
/* Set DCBlength. (Windows NT does not do this, but 9x does) */
|
||||||
port=device[3]-'0';
|
lpdcb->DCBlength = sizeof(DCB);
|
||||||
if (port--==0) {
|
|
||||||
ERR("BUG! COM0 can't exist!\n");
|
|
||||||
return FALSE;
|
|
||||||
}
|
|
||||||
if ((*(device+4)!=':') && (*(device+4)!=' '))
|
|
||||||
return FALSE;
|
|
||||||
temp=(LPSTR)(device+5);
|
|
||||||
} else
|
|
||||||
temp=(LPSTR)device;
|
|
||||||
|
|
||||||
memset(lpdcb,0,sizeof (DCB));
|
/* Make a copy of the original data structures to work with since if
|
||||||
lpdcb->DCBlength = sizeof(DCB);
|
if there is an error in the device control string the originals
|
||||||
if (strchr(temp,',')) { /* old style */
|
should not be modified (except possibly DCBlength) */
|
||||||
|
memcpy(&dcb, lpdcb, sizeof(DCB));
|
||||||
|
if(lptimeouts) memcpy(&timeouts, lptimeouts, sizeof(COMMTIMEOUTS));
|
||||||
|
|
||||||
return COMM_BuildOldCommDCB(device,lpdcb);
|
ptr = COMM_ParseStart(ptr);
|
||||||
|
|
||||||
|
if(ptr == NULL)
|
||||||
|
result = FALSE;
|
||||||
|
else if(strchr(ptr, ','))
|
||||||
|
result = COMM_BuildOldCommDCB(ptr, &dcb);
|
||||||
|
else
|
||||||
|
result = COMM_BuildNewCommDCB(ptr, &dcb, &timeouts);
|
||||||
|
|
||||||
|
if(result)
|
||||||
|
{
|
||||||
|
memcpy(lpdcb, &dcb, sizeof(DCB));
|
||||||
|
if(lptimeouts) memcpy(lptimeouts, &timeouts, sizeof(COMMTIMEOUTS));
|
||||||
|
return TRUE;
|
||||||
}
|
}
|
||||||
ptr=strtok(temp," ");
|
else
|
||||||
while (ptr) {
|
{
|
||||||
DWORD flag,x;
|
WARN("Invalid device control string: %s\n", device);
|
||||||
|
SetLastError(ERROR_INVALID_PARAMETER);
|
||||||
flag=0;
|
return FALSE;
|
||||||
if (!strncasecmp("baud=",ptr,5)) {
|
|
||||||
if (!sscanf(ptr+5,"%ld",&x))
|
|
||||||
WARN("Couldn't parse %s\n",ptr);
|
|
||||||
lpdcb->BaudRate = x;
|
|
||||||
flag=1;
|
|
||||||
}
|
|
||||||
if (!strncasecmp("stop=",ptr,5)) {
|
|
||||||
if (!sscanf(ptr+5,"%ld",&x))
|
|
||||||
WARN("Couldn't parse %s\n",ptr);
|
|
||||||
lpdcb->StopBits = x;
|
|
||||||
flag=1;
|
|
||||||
}
|
|
||||||
if (!strncasecmp("data=",ptr,5)) {
|
|
||||||
if (!sscanf(ptr+5,"%ld",&x))
|
|
||||||
WARN("Couldn't parse %s\n",ptr);
|
|
||||||
lpdcb->ByteSize = x;
|
|
||||||
flag=1;
|
|
||||||
}
|
|
||||||
if (!strncasecmp("parity=",ptr,7)) {
|
|
||||||
lpdcb->fParity = TRUE;
|
|
||||||
switch (ptr[7]) {
|
|
||||||
case 'N':case 'n':
|
|
||||||
lpdcb->fParity = FALSE;
|
|
||||||
lpdcb->Parity = NOPARITY;
|
|
||||||
break;
|
|
||||||
case 'E':case 'e':
|
|
||||||
lpdcb->Parity = EVENPARITY;
|
|
||||||
break;
|
|
||||||
case 'O':case 'o':
|
|
||||||
lpdcb->Parity = ODDPARITY;
|
|
||||||
break;
|
|
||||||
case 'M':case 'm':
|
|
||||||
lpdcb->Parity = MARKPARITY;
|
|
||||||
break;
|
|
||||||
case 'S':case 's':
|
|
||||||
lpdcb->Parity = SPACEPARITY;
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
flag=1;
|
|
||||||
}
|
|
||||||
if (!flag)
|
|
||||||
ERR("Unhandled specifier '%s', please report.\n",ptr);
|
|
||||||
ptr=strtok(NULL," ");
|
|
||||||
}
|
}
|
||||||
if (lpdcb->BaudRate==110)
|
|
||||||
lpdcb->StopBits = 2;
|
|
||||||
return TRUE;
|
|
||||||
}
|
}
|
||||||
|
|
||||||
/**************************************************************************
|
/**************************************************************************
|
||||||
|
|
@ -414,7 +591,7 @@ BOOL WINAPI BuildCommDCBAndTimeoutsA(
|
||||||
BOOL WINAPI BuildCommDCBAndTimeoutsW(
|
BOOL WINAPI BuildCommDCBAndTimeoutsW(
|
||||||
LPCWSTR devid, /* [in] The unicode device control string. */
|
LPCWSTR devid, /* [in] The unicode device control string. */
|
||||||
LPDCB lpdcb, /* [out] The device control block to be updated. */
|
LPDCB lpdcb, /* [out] The device control block to be updated. */
|
||||||
LPCOMMTIMEOUTS lptimeouts) /* [in] The timeouts to use if asked to set them by the control string. */
|
LPCOMMTIMEOUTS lptimeouts) /* [in] The COMMTIMEOUTS structure to be updated. */
|
||||||
{
|
{
|
||||||
BOOL ret = FALSE;
|
BOOL ret = FALSE;
|
||||||
LPSTR devidA;
|
LPSTR devidA;
|
||||||
|
|
|
||||||
|
|
@ -970,6 +970,7 @@ typedef struct tagDCB
|
||||||
char ErrorChar;
|
char ErrorChar;
|
||||||
char EofChar;
|
char EofChar;
|
||||||
char EvtChar;
|
char EvtChar;
|
||||||
|
WORD wReserved1;
|
||||||
} DCB, *LPDCB;
|
} DCB, *LPDCB;
|
||||||
|
|
||||||
typedef struct tagCOMMCONFIG {
|
typedef struct tagCOMMCONFIG {
|
||||||
|
|
|
||||||
Loading…
Reference in New Issue