98 lines
1.9 KiB
C
98 lines
1.9 KiB
C
#include <stdlib.h>
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#include <stdio.h>
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#include <pcap.h>
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#ifdef WIN32
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#include <tchar.h>
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BOOL LoadNpcapDlls()
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{
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_TCHAR npcap_dir[512];
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UINT len;
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len = GetSystemDirectory(npcap_dir, 480);
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if (!len) {
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fprintf(stderr, "Error in GetSystemDirectory: %x", GetLastError());
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return FALSE;
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}
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_tcscat_s(npcap_dir, 512, _T("\\Npcap"));
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if (SetDllDirectory(npcap_dir) == 0) {
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fprintf(stderr, "Error in SetDllDirectory: %x", GetLastError());
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return FALSE;
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}
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return TRUE;
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}
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#endif
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int main(int argc, char **argv)
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{
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pcap_t *fp;
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char errbuf[PCAP_ERRBUF_SIZE];
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u_char packet[100];
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int i;
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#ifdef WIN32
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/* Load Npcap and its functions. */
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if (!LoadNpcapDlls())
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{
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fprintf(stderr, "Couldn't load Npcap\n");
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exit(1);
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}
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#endif
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/* Check the validity of the command line */
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if (argc != 2)
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{
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printf("usage: %s interface", argv[0]);
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return 1;
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}
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/* Open the adapter */
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if ((fp = pcap_open_live(argv[1], // name of the device
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65536, // portion of the packet to capture. It doesn't matter in this case
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1, // promiscuous mode (nonzero means promiscuous)
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1000, // read timeout
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errbuf // error buffer
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)) == NULL)
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{
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fprintf(stderr,"\nUnable to open the adapter. %s is not supported by Npcap\n", argv[1]);
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return 2;
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}
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/* Supposing to be on ethernet, set mac destination to 1:1:1:1:1:1 */
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packet[0]=1;
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packet[1]=1;
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packet[2]=1;
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packet[3]=1;
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packet[4]=1;
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packet[5]=1;
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/* set mac source to 2:2:2:2:2:2 */
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packet[6]=2;
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packet[7]=2;
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packet[8]=2;
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packet[9]=2;
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packet[10]=2;
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packet[11]=2;
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/* Fill the rest of the packet */
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for(i=12;i<100;i++)
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{
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packet[i]= (u_char)i;
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}
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/* Send down the packet */
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if (pcap_sendpacket(fp, // Adapter
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packet, // buffer with the packet
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100 // size
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) != 0)
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{
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fprintf(stderr,"\nError sending the packet: %s\n", pcap_geterr(fp));
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return 3;
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}
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pcap_close(fp);
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return 0;
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}
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