network arplab finished

network/start/lib/npcap/Examples-pcap/sendpack/sendpack.c

@@ -0,0 +1,97 @@
+#include <stdlib.h>
+#include <stdio.h>
+
+#include <pcap.h>
+
+#ifdef WIN32
+#include <tchar.h>
+BOOL LoadNpcapDlls()
+{
+	_TCHAR npcap_dir[512];
+	UINT len;
+	len = GetSystemDirectory(npcap_dir, 480);
+	if (!len) {
+		fprintf(stderr, "Error in GetSystemDirectory: %x", GetLastError());
+		return FALSE;
+	}
+	_tcscat_s(npcap_dir, 512, _T("\\Npcap"));
+	if (SetDllDirectory(npcap_dir) == 0) {
+		fprintf(stderr, "Error in SetDllDirectory: %x", GetLastError());
+		return FALSE;
+	}
+	return TRUE;
+}
+#endif
+
+
+int main(int argc, char **argv)
+{
+	pcap_t *fp;
+	char errbuf[PCAP_ERRBUF_SIZE];
+	u_char packet[100];
+	int i;
+	
+#ifdef WIN32
+	/* Load Npcap and its functions. */
+	if (!LoadNpcapDlls())
+	{
+		fprintf(stderr, "Couldn't load Npcap\n");
+		exit(1);
+	}
+#endif
+
+	/* Check the validity of the command line */
+	if (argc != 2)
+	{
+		printf("usage: %s interface", argv[0]);
+		return 1;
+	}
+    
+	/* Open the adapter */
+	if ((fp = pcap_open_live(argv[1],		// name of the device
+							 65536,			// portion of the packet to capture. It doesn't matter in this case 
+							 1,				// promiscuous mode (nonzero means promiscuous)
+							 1000,			// read timeout
+							 errbuf			// error buffer
+							 )) == NULL)
+	{
+		fprintf(stderr,"\nUnable to open the adapter. %s is not supported by Npcap\n", argv[1]);
+		return 2;
+	}
+
+	/* Supposing to be on ethernet, set mac destination to 1:1:1:1:1:1 */
+	packet[0]=1;
+	packet[1]=1;
+	packet[2]=1;
+	packet[3]=1;
+	packet[4]=1;
+	packet[5]=1;
+	
+	/* set mac source to 2:2:2:2:2:2 */
+	packet[6]=2;
+	packet[7]=2;
+	packet[8]=2;
+	packet[9]=2;
+	packet[10]=2;
+	packet[11]=2;
+	
+	/* Fill the rest of the packet */
+	for(i=12;i<100;i++)
+	{
+		packet[i]= (u_char)i;
+	}
+
+	/* Send down the packet */
+	if (pcap_sendpacket(fp,	// Adapter
+		packet,				// buffer with the packet
+		100					// size
+		) != 0)
+	{
+		fprintf(stderr,"\nError sending the packet: %s\n", pcap_geterr(fp));
+		return 3;
+	}
+
+	pcap_close(fp);	
+	return 0;
+}
+