network arplab finished

network/start/lib/npcap/Examples-remote/misc/readfile.c

@@ -0,0 +1,86 @@
+#include <stdio.h>
+#include <pcap.h>
+#include "misc.h"
+
+#define LINE_LEN 16
+
+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];
+char source[PCAP_BUF_SIZE];
+
+    /* Load Npcap and its functions. */
+    if (!LoadNpcapDlls())
+    {
+        fprintf(stderr, "Couldn't load Npcap\n");
+        exit(1);
+    }
+
+	if(argc != 2){
+
+		printf("usage: %s filename", argv[0]);
+		return -1;
+
+	}
+
+	/* Create the source string according to the new WinPcap syntax */
+	if ( pcap_createsrcstr(	source,			// variable that will keep the source string
+							PCAP_SRC_FILE,	// we want to open a file
+							NULL,			// remote host
+							NULL,			// port on the remote host
+							argv[1],		// name of the file we want to open
+							errbuf			// error buffer
+							) != 0)
+	{
+		fprintf(stderr,"\nError creating a source string\n");
+		return -1;
+	}
+	
+	/* Open the capture file */
+	if ( (fp= pcap_open(source,			// name of the device
+						65536,			// portion of the packet to capture
+										// 65536 guarantees that the whole packet will be captured on all the link layers
+						 PCAP_OPENFLAG_PROMISCUOUS, 	// promiscuous mode
+						 1000,				// read timeout
+						 NULL,				// authentication on the remote machine
+						 errbuf			// error buffer
+						 ) ) == NULL)
+	{
+		fprintf(stderr,"\nUnable to open the file %s.\n", source);
+		return -1;
+	}
+
+	// read and dispatch packets until EOF is reached
+	pcap_loop(fp, 0, dispatcher_handler, NULL);
+
+	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");		
+	
+}