123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184 |
- /*
- * 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 <time.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(<ime, &local_tv_sec);
- strftime( timestr, sizeof timestr, "%H:%M:%S", <ime);
- /* 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);
- }
|