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<DIV><FONT face="Courier New">Have you debugged your application? Where does it
crash exactly? within your app code or within the winpcap dlls?</FONT></DIV>
<DIV><FONT face="Courier New"></FONT> </DIV>
<DIV><FONT face="Courier New">Have a nice day</FONT></DIV>
<DIV><FONT face="Courier New">GV</FONT></DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=samudavid@hotmail.com href="mailto:samudavid@hotmail.com">samu</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=winpcap-users@winpcap.org
href="mailto:winpcap-users@winpcap.org">winpcap-users@winpcap.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Sunday, January 04, 2009 5:35
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [Winpcap-users] Problem getting
local MAC</DIV>
<DIV><BR></DIV>Hello everybody,<BR><BR>Im using WPCAP to send and capture
ethernet packets. My program is written in VS C 2003.<BR><BR>I need to get my
local MAC address to send ethernets frames with my MAC address in the source
field. I was looking for it in the mail list and found the following example
in the developers pack:<BR><PRE>Examples-Remote/PacketDriver/GetMacAdress<BR><BR>The program works perfectly, but when i add the code to my program it stops working. I´ve comment <BR>out all the things that i don´t need.<BR><BR>When i run the program it fails (in run time) with an exception accesing a memory location. I´ve <BR>checked that the array "AdapterList" stores the correct information.<BR><BR>Thanks a lot to everybody, i hope that the problem is easy to be solved. <BR><BR><BR><BR>#define Max_Num_Adapter 10<BR>int CRSACOM::ObtenerMACLocal(int Open)<BR>{<BR> <BR>char AdapterList[Max_Num_Adapter][1024];<BR><BR> LPADAPTER lpAdapter = 0;<BR> int i;<BR> DWORD dwErrorCode;<BR> char AdapterName[8192];<BR> char *temp,*temp1;<BR> int AdapterNum=0;<BR> ULONG AdapterLength;<BR> PPACKET_OID_DATA OidData;<BR> BOOLEAN Status;<BR> <BR> <BR><BR><BR><BR> //<BR> // Obtain the name of the adapters installed on this machine<BR> //<BR><BR>// printf("Packet.dll test application. Library version:%s\n", PacketGetVersion());<BR> <BR> //printf("Adapters installed:\n");<BR> i=0; <BR> <BR> AdapterLength = sizeof(AdapterName);<BR> <BR> if(PacketGetAdapterNames(AdapterName,&AdapterLength)==FALSE){<BR> //printf("Unable to retrieve the list of the adapters!\n");<BR> return -1;<BR> }<BR> temp=AdapterName;<BR> temp1=AdapterName;<BR><BR> while ((*temp!='\0')||(*(temp-1)!='\0'))<BR> {<BR> if (*temp=='\0') <BR> {<BR> memcpy(AdapterList[i],temp1,temp-temp1);<BR> temp1=temp+1;<BR> i++;<BR> }<BR> temp++;<BR> }<BR> <BR> AdapterNum=i;<BR> //for (i=0;i<AdapterNum;i++)<BR> // printf("\n%d- %s\n",i+1,AdapterList[i]);<BR> //printf("\n");<BR><BR>/*<BR> do <BR> {<BR> printf("Select the number of the adapter to open : ");<BR> scanf("%d",&Open);<BR> if (Open>AdapterNum) printf("\nThe number must be smaller than %d",AdapterNum); <BR> } while (Open>AdapterNum);<BR> <BR>*/<BR> //<BR> // Open the selected adapter<BR> //<BR><BR> lpAdapter = PacketOpenAdapter(AdapterList[Open]);<BR> <BR> <BR> if (!lpAdapter || (lpAdapter->hFile == INVALID_HANDLE_VALUE))<BR> {<BR> dwErrorCode=GetLastError();<BR> //printf("Unable to open the adapter, Error Code : %lx\n",dwErrorCode); <BR><BR> return -1;<BR> } <BR><BR> // <BR> // Allocate a buffer to get the MAC adress<BR> //<BR><BR> <BR> OidData = (PACKET_OID_DATA*)malloc(6 + sizeof(PACKET_OID_DATA));<BR> if (OidData == NULL) <BR> {<BR> //printf("error allocating memory!\n");<BR> PacketCloseAdapter(lpAdapter);<BR> return -1;<BR> }<BR><BR> // <BR> // Retrieve the adapter MAC querying the NIC driver<BR> //<BR><BR> OidData->Oid = OID_802_3_CURRENT_ADDRESS;<BR><BR> OidData->Length = 6;<BR> ZeroMemory(OidData->Data, 6);<BR> <BR> Status = PacketRequest(lpAdapter, FALSE, OidData);<BR><BR><BR> if(Status)<BR> {<BR><BR> memcpy(MACLocal,OidData->Data,6);<BR> /* printf("The MAC address of the adapter is %.2x:%.2x:%.2x:%.2x:%.2x:%.2x\n",<BR> (PCHAR)(OidData->Data)[0],<BR> (PCHAR)(OidData->Data)[1],<BR> (PCHAR)(OidData->Data)[2],<BR> (PCHAR)(OidData->Data)[3],<BR> (PCHAR)(OidData->Data)[4],<BR> (PCHAR)(OidData->Data)[5]);*/<BR> }<BR> else<BR> {<BR> //printf("error retrieving the MAC address of the adapter!\n");<BR> }<BR><BR> free(OidData);<BR> PacketCloseAdapter(lpAdapter);<BR> return (0);<BR><BR>}<BR></PRE><BR>
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