network arplab finished

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

@@ -0,0 +1,90 @@
+#include <stdio.h>
+#include <pcap.h>
+
+#define LINE_LEN 16
+
+#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
+
+void dispatcher_handler(u_char *, const struct pcap_pkthdr *, const u_char *);
+
+int main(int argc, char **argv)
+{
+	pcap_t *fp;
+	char errbuf[PCAP_ERRBUF_SIZE];
+	
+#ifdef WIN32
+	/* Load Npcap and its functions. */
+	if (!LoadNpcapDlls())
+	{
+		fprintf(stderr, "Couldn't load Npcap\n");
+		exit(1);
+	}
+#endif
+
+	if(argc != 2)
+	{	
+		printf("usage: %s filename", argv[0]);
+		return -1;
+
+	}
+	
+	/* Open the capture file */
+	if ((fp = pcap_open_offline(argv[1],			// name of the device
+						 errbuf					// error buffer
+						 )) == NULL)
+	{
+		fprintf(stderr,"\nUnable to open the file %s.\n", argv[1]);
+		return -1;
+	}
+
+	/* read and dispatch packets until EOF is reached */
+	pcap_loop(fp, 0, dispatcher_handler, NULL);
+
+	pcap_close(fp);
+	return 0;
+}
+
+
+
+void dispatcher_handler(u_char *temp1, 
+						const struct pcap_pkthdr *header, 
+						const u_char *pkt_data)
+{
+	u_int i=0;
+	
+	/*
+	 * unused variable
+	 */
+	(VOID*)temp1;
+
+	/* print pkt timestamp and pkt len */
+	printf("%ld:%ld (%ld)\n", header->ts.tv_sec, header->ts.tv_usec, header->len);			
+	
+	/* Print the packet */
+	for (i=1; (i < header->caplen + 1 ) ; i++)
+	{
+		printf("%.2x ", pkt_data[i-1]);
+		if ( (i % LINE_LEN) == 0) printf("\n");
+	}
+	
+	printf("\n\n");		
+	
+}