mirror of
https://github.com/ep00ch/lwip-contrib-mac.git
synced 2024-06-12 01:29:28 +00:00
Removed redundant Win95/WinNT code, added comments, added defines for constants
This commit is contained in:
goldsimon
parent
907c0967d0
commit
5f52fc424f
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@ -73,140 +73,122 @@
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/** @todo use the lwip header file */
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#define ETHARP_HWADDR_LEN 6
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#define MAX_NUM_ADAPTERS 10
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#define ADAPTER_NAME_LEN 4096
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#define PACKET_ADAPTER_BUFSIZE 512000
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#define PACKET_INPUT_BUFSIZE 256000
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extern void process_input(void);
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/* global variables for only one adapter */
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LPADAPTER lpAdapter;
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LPPACKET lpPacket;
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char buffer[256000]; /* buffer to hold the data coming from the driver */
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char buffer[PACKET_INPUT_BUFSIZE]; /* buffer to hold the data coming from the driver */
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unsigned char *cur_packet;
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int cur_length;
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unsigned char ethaddr[ETHARP_HWADDR_LEN];
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/*-----------------------------------------------------------------------------------*/
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/**
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* Open a network adapter and set it up for packet input
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*
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* @param adapter_num the index of the adapter to use
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* @param mac_addr the MAC address of the adapter is stored here (if != NULL)
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* @return 0 on success, -1 on failure
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*/
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int
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init_adapter(int adapter_num, char* mac_addr)
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{
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#define Max_Num_Adapter 10
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void *AdapterList[Max_Num_Adapter];
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void *AdapterList[MAX_NUM_ADAPTERS];
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int i;
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DWORD dwVersion;
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DWORD dwWindowsMajorVersion;
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/* unicode strings (winnt) */
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char AdapterName[8192]; /* string that contains a list of the network adapters */
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char *temp,*temp1;
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/* ascii strings (win95) */
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char AdapterNamea[8192]; /* string that contains a list of the network adapters */
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char *tempa,*temp1a;
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int AdapterNum=0;
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ULONG AdapterLength;
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char AdapterName[ADAPTER_NAME_LEN]; /* string that contains a list of the network adapters */
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char *temp, *start;
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int AdapterNum =0;
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ULONG AdapterLength;
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PPACKET_OID_DATA ppacket_oid_data;
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unsigned char ethaddr[ETHARP_HWADDR_LEN];
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/* obtain the name of the adapters installed on this machine */
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AdapterLength=4096;
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memset(AdapterList, 0, sizeof(AdapterList));
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memset(AdapterName, 0, sizeof(AdapterName));
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memset(AdapterList,0,sizeof(AdapterList));
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memset(AdapterName,0,sizeof(AdapterName));
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memset(AdapterNamea,0,sizeof(AdapterNamea));
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i=0;
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/* the data returned by PacketGetAdapterNames is different in Win95 and in WinNT.
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* We have to check the os on which we are running */
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dwVersion=GetVersion();
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dwWindowsMajorVersion = (DWORD)(LOBYTE(LOWORD(dwVersion)));
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if (!(dwVersion >= 0x80000000 && dwWindowsMajorVersion >= 4)) {
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/* Windows NT */
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if (PacketGetAdapterNames((char *)AdapterName,&AdapterLength)==FALSE){
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printf("Unable to retrieve the list of the adapters!\n");
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return -1;
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}
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temp=AdapterName;
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temp1=AdapterName;
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while ((*temp!='\0')||(*(temp-1)!='\0')) {
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if (*temp=='\0') {
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AdapterList[i] = temp1;
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temp1=temp+1;
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i++;
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}
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temp++;
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}
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AdapterNum=i;
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for (i=0; i<AdapterNum; i++) {
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printf("%2i: %s\n", i, AdapterList[i]);
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}
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} else {
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/* Windows 95 */
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if (PacketGetAdapterNames(AdapterNamea,&AdapterLength)==FALSE) {
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printf("Unable to retrieve the list of the adapters!\n");
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return -1;
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}
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tempa = AdapterNamea;
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temp1a = AdapterNamea;
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while ((*tempa!='\0')||(*(tempa-1)!='\0')) {
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if (*tempa=='\0') {
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AdapterList[i] = temp1a;
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temp1a=tempa+1;
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i++;
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}
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tempa++;
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}
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AdapterNum=i;
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AdapterNum=i;
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for (i=0; i<AdapterNum; i++) {
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printf("%2i: %s", i, AdapterList[i]);
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}
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}
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if (AdapterNum<=0) {
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/* obtain the name of the adapters installed on this machine
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(a list of strings separated by '\0') */
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AdapterLength = ADAPTER_NAME_LEN;
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if (PacketGetAdapterNames((char*)AdapterName, &AdapterLength)==FALSE){
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printf("Unable to retrieve the list of the adapters!\n");
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return -1;
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}
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/* get the start of each adapter name in the list and put it into
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* the AdapterList array */
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i = 0;
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temp = AdapterName;
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start = AdapterName;
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while ((*temp != '\0') || (*(temp - 1) != '\0')) {
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if (*temp == '\0') {
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AdapterList[i] = start;
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start = temp + 1;
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i++;
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if (i >= MAX_NUM_ADAPTERS) {
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break;
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}
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}
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temp++;
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}
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/* print all adapter names */
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AdapterNum = i;
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if (AdapterNum <= 0) {
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return -1; /* no adapters found */
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}
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for (i = 0; i < AdapterNum; i++) {
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printf("%2i: %s\n", i, AdapterList[i]);
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}
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/* invalid adapter index -> check this after printing the adapters */
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if (adapter_num < 0) {
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return -1;
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}
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/* adapter index out of range */
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if (adapter_num >= AdapterNum) {
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return -1;
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}
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ppacket_oid_data=malloc(sizeof(PACKET_OID_DATA)+ETHARP_HWADDR_LEN);
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lpAdapter=PacketOpenAdapter(AdapterList[adapter_num]);
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/* set up the selected adapter */
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ppacket_oid_data = malloc(sizeof(PACKET_OID_DATA) + ETHARP_HWADDR_LEN);
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lpAdapter = PacketOpenAdapter(AdapterList[adapter_num]);
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if (!lpAdapter || (lpAdapter->hFile == INVALID_HANDLE_VALUE)) {
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lpAdapter = NULL;
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return -1;
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}
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ppacket_oid_data->Oid=OID_802_3_PERMANENT_ADDRESS;
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ppacket_oid_data->Length=ETHARP_HWADDR_LEN;
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if (!PacketRequest(lpAdapter,FALSE,ppacket_oid_data)) {
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/* get the MAC address of the selected adapter */
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ppacket_oid_data->Oid = OID_802_3_PERMANENT_ADDRESS;
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ppacket_oid_data->Length = ETHARP_HWADDR_LEN;
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if (!PacketRequest(lpAdapter, FALSE, ppacket_oid_data)) {
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lpAdapter = NULL;
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return -1;
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}
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memcpy(ðaddr,ppacket_oid_data->Data,ETHARP_HWADDR_LEN);
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/* copy the MAC address */
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memcpy(ðaddr, ppacket_oid_data->Data, ETHARP_HWADDR_LEN);
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free(ppacket_oid_data);
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memcpy(mac_addr, ethaddr, ETHARP_HWADDR_LEN);
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if (mac_addr != NULL) {
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/* copy the MAC address to the user supplied buffer, also */
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memcpy(mac_addr, ethaddr, ETHARP_HWADDR_LEN);
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}
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printf("MAC: %02X:%02X:%02X:%02X:%02X:%02X\n", ethaddr[0], ethaddr[1], ethaddr[2], ethaddr[3], ethaddr[4], ethaddr[5]);
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PacketSetBuff(lpAdapter,512000);
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PacketSetReadTimeout(lpAdapter,1);
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PacketSetHwFilter(lpAdapter,NDIS_PACKET_TYPE_ALL_LOCAL | NDIS_PACKET_TYPE_PROMISCUOUS);
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if ((lpPacket = PacketAllocatePacket())==NULL) {
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/* some more adapter settings */
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PacketSetBuff(lpAdapter, PACKET_ADAPTER_BUFSIZE);
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PacketSetReadTimeout(lpAdapter, 1);
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PacketSetHwFilter(lpAdapter, NDIS_PACKET_TYPE_ALL_LOCAL | NDIS_PACKET_TYPE_PROMISCUOUS);
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/* set up packet descriptor (the application input buffer) */
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if ((lpPacket = PacketAllocatePacket()) == NULL) {
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lpAdapter = NULL;
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return -1;
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}
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PacketInitPacket(lpPacket,(char*)buffer, sizeof(buffer));
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return 0;
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}
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/**
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* Close the adapter (no more packets can be sent or received
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*/
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void
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shutdown_adapter(void)
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{
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@ -216,6 +198,12 @@ shutdown_adapter(void)
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}
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}
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/**
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* Send a packet
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*
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* @param buffer complete packet to send (including ETH header; without CRC)
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* @param len length of the packet (including ETH header; without CRC)
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*/
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int
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packet_send(void *buffer, int len)
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{
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@ -227,8 +215,8 @@ packet_send(void *buffer, int len)
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if ((lpPacket = PacketAllocatePacket()) == NULL) {
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return -1;
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}
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PacketInitPacket(lpPacket,buffer,len);
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if (!PacketSendPacket(lpAdapter,lpPacket,TRUE)) {
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PacketInitPacket(lpPacket, buffer, len);
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if (!PacketSendPacket(lpAdapter, lpPacket, TRUE)) {
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return -1;
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}
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PacketFreePacket(lpPacket);
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@ -236,14 +224,19 @@ packet_send(void *buffer, int len)
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return 0;
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}
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/**
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* Process a packet buffer (which can hold multiple packets) and feed
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* every packet to process_input().
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*
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* @param lpPacket the packet buffer to process */
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static void
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ProcessPackets(LPPACKET lpPacket)
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{
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ULONG ulLines, ulBytesReceived;
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char *base;
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char *buf;
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u_int off=0;
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u_int tlen,tlen1;
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u_int off = 0;
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u_int tlen, tlen1;
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struct bpf_hdr *hdr;
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ulBytesReceived = lpPacket->ulBytesReceived;
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@ -252,16 +245,16 @@ ProcessPackets(LPPACKET lpPacket)
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off=0;
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while (off<ulBytesReceived) {
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hdr=(struct bpf_hdr *)(buf+off);
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tlen1=hdr->bh_datalen;
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cur_length=tlen1;
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tlen=hdr->bh_caplen;
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off+=hdr->bh_hdrlen;
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while (off < ulBytesReceived) {
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hdr = (struct bpf_hdr *)(buf + off);
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tlen1 = hdr->bh_datalen;
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cur_length = tlen1;
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tlen = hdr->bh_caplen;
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off += hdr->bh_hdrlen;
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ulLines = (tlen + 15) / 16;
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if (ulLines > 5) {
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ulLines=5;
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ulLines = 5;
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}
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base =(char*)(buf + off);
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@ -272,12 +265,14 @@ ProcessPackets(LPPACKET lpPacket)
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}
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}
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/**
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* Check for newly received packets. Called in the main loop: 'interrupt' mode is not
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* really supported :(
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*/
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void
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update_adapter(void)
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{
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if ((lpAdapter != NULL) && (PacketReceivePacket(lpAdapter, lpPacket, TRUE))) {
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ProcessPackets(lpPacket);
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}
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cur_length=0;
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cur_packet=NULL;
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}
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