network arplab finished

network/start/lib/npcap/Examples-remote/tcptop/tcptop.c

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+/*
+ * Copyright (c) 1999 - 2005 NetGroup, Politecnico di Torino (Italy)
+ * Copyright (c) 2005 - 2006 CACE Technologies, Davis (California)
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the Politecnico di Torino, CACE Technologies 
+ * nor the names of its contributors may be used to endorse or promote 
+ * products derived from this software without specific prior written 
+ * permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+
+#include <pcap.h>
+
+#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;
+}
+
+void usage();
+
+void dispatcher_handler(u_char *, const struct pcap_pkthdr *, const u_char *);
+
+
+void main(int argc, char **argv)
+{
+pcap_t *fp;
+char errbuf[PCAP_ERRBUF_SIZE];
+struct timeval st_ts;
+u_int netmask;
+struct bpf_program fcode;
+  
+    /* Load Npcap and its functions. */
+    if (!LoadNpcapDlls())
+    {
+        fprintf(stderr, "Couldn't load Npcap\n");
+        exit(1);
+    }
+
+	/* Check the validity of the command line */
+	if (argc != 2)
+	{
+		usage();
+		return;
+	}
+		
+	/* Open the output adapter */
+	if ( (fp= pcap_open(argv[1], 100, PCAP_OPENFLAG_PROMISCUOUS, 1000, NULL, errbuf) ) == NULL)
+	{
+		fprintf(stderr,"\nUnable to open adapter %s.\n", errbuf);
+		return;
+	}
+
+    /* Don't care about netmask, it won't be used for this filter */
+    netmask=0xffffff; 
+
+    //compile the filter
+    if (pcap_compile(fp, &fcode, "tcp", 1, netmask) <0 )
+	{
+        fprintf(stderr,"\nUnable to compile the packet filter. Check the syntax.\n");
+        /* Free the device list */
+        return;
+    }
+    
+    //set the filter
+    if (pcap_setfilter(fp, &fcode)<0)
+	{
+        fprintf(stderr,"\nError setting the filter.\n");
+		pcap_close(fp);
+        /* Free the device list */
+        return;
+    }
+
+	/* Put the interface in statstics mode */
+	if (pcap_setmode(fp, MODE_STAT)<0)
+	{
+        fprintf(stderr,"\nError setting the mode.\n");
+		pcap_close(fp);
+        /* Free the device list */
+        return;
+    }
+
+
+	printf("TCP traffic summary:\n");
+
+	/* Start the main loop */
+	pcap_loop(fp, 0, dispatcher_handler, (PUCHAR)&st_ts);
+
+	pcap_close(fp);
+	return;
+}
+
+void dispatcher_handler(u_char *state, const struct pcap_pkthdr *header, const u_char *pkt_data)
+{
+	struct timeval *old_ts = (struct timeval *)state;
+	u_int delay;
+	LARGE_INTEGER Bps,Pps;
+	struct tm ltime;
+	char timestr[16];
+	time_t local_tv_sec;
+
+	/* Calculate the delay in microseconds from the last sample. */
+	/* This value is obtained from the timestamp that the associated with the sample. */
+	delay=(header->ts.tv_sec - old_ts->tv_sec) * 1000000 - old_ts->tv_usec + header->ts.tv_usec;
+	/* Get the number of Bits per second */
+	Bps.QuadPart=(((*(LONGLONG*)(pkt_data + 8)) * 8 * 1000000) / (delay));
+	/*                                            ^      ^
+                                                  |      |
+                                                  |      | 
+                                                  |      |
+                         converts bytes in bits --       |
+                                                         |
+                    delay is expressed in microseconds --
+	*/
+
+	/* Get the number of Packets per second */
+	Pps.QuadPart=(((*(LONGLONG*)(pkt_data)) * 1000000) / (delay));
+
+	/* Convert the timestamp to readable format */
+	local_tv_sec = header->ts.tv_sec;
+	localtime_s(&ltime, &local_tv_sec);
+	strftime( timestr, sizeof timestr, "%H:%M:%S", &ltime);
+
+	/* Print timestamp*/
+	printf("%s ", timestr);
+
+	/* Print the samples */
+	printf("BPS=%I64u ", Bps.QuadPart);
+	printf("PPS=%I64u\n", Pps.QuadPart);
+
+	//store current timestamp
+	old_ts->tv_sec=header->ts.tv_sec;
+	old_ts->tv_usec=header->ts.tv_usec;
+}
+
+
+void usage()
+{
+	
+	printf("\nShows the TCP traffic load, in bits per second and packets per second.\nCopyright (C) 2002 Loris Degioanni.\n");
+	printf("\nUsage:\n");
+	printf("\t tcptop adapter\n");
+	printf("\t You can use \"WinDump -D\" if you don't know the name of your adapters.\n");
+
+	exit(0);
+}