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