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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 /><hr />¡Accede al correo desde el móvil! <a href='http://vivelive.com/encuesta/' target='_new'>¿Qué opinas? </a></body>
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