235 lines
7.0 KiB
C
235 lines
7.0 KiB
C
/*
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* iperf, Copyright (c) 2014, 2017, The Regents of the University of
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* California, through Lawrence Berkeley National Laboratory (subject
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* to receipt of any required approvals from the U.S. Dept. of
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* Energy). All rights reserved.
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*
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* If you have questions about your rights to use or distribute this
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* software, please contact Berkeley Lab's Technology Transfer
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* Department at TTD@lbl.gov.
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*
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* NOTICE. This software is owned by the U.S. Department of Energy.
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* As such, the U.S. Government has been granted for itself and others
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* acting on its behalf a paid-up, nonexclusive, irrevocable,
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* worldwide license in the Software to reproduce, prepare derivative
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* works, and perform publicly and display publicly. Beginning five
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* (5) years after the date permission to assert copyright is obtained
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* from the U.S. Department of Energy, and subject to any subsequent
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* five (5) year renewals, the U.S. Government is granted for itself
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* and others acting on its behalf a paid-up, nonexclusive,
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* irrevocable, worldwide license in the Software to reproduce,
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* prepare derivative works, distribute copies to the public, perform
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* publicly and display publicly, and to permit others to do so.
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*
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* This code is distributed under a BSD style license, see the LICENSE
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* file for complete information.
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*/
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/*
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* routines related to collection TCP_INFO using getsockopt()
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*
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* Brian Tierney, ESnet (bltierney@es.net)
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*
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* Note that this is only really useful on Linux.
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* XXX: only standard on linux versions 2.4 and later
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#
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* FreeBSD has a limited implementation that only includes the following:
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* tcpi_snd_ssthresh, tcpi_snd_cwnd, tcpi_rcv_space, tcpi_rtt
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* Based on information on http://wiki.freebsd.org/8.0TODO, I dont think this will be
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* fixed before v8.1 at the earliest.
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*
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* OSX has no support.
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*
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* I think MS Windows does support TCP_INFO, but iperf3 does not currently support Windows.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <string.h>
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#include <netinet/in.h>
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#include <errno.h>
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#include "iperf.h"
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#include "iperf_api.h"
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#include "iperf_locale.h"
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/*************************************************************/
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int
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has_tcpinfo(void)
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{
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#if (defined(linux) || defined(__FreeBSD__) || defined(__NetBSD__)) \
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&& defined(TCP_INFO)
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return 1;
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#else
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return 0;
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#endif
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}
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/*************************************************************/
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int
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has_tcpinfo_retransmits(void)
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{
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#if defined(linux) && defined(TCP_MD5SIG)
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/* TCP_MD5SIG doesn't actually have anything to do with TCP
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** retransmits, it just showed up in the same rev of the header
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** file. If it's present then struct tcp_info has the
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** tcpi_total_retrans field that we need; if not, not.
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*/
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return 1;
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#else
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#if defined(__FreeBSD__) && __FreeBSD_version >= 600000
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return 1; /* Should work now */
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#elif defined(__NetBSD__) && defined(TCP_INFO)
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return 1;
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#else
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return 0;
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#endif
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#endif
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}
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/*************************************************************/
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void
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save_tcpinfo(struct iperf_stream *sp, struct iperf_interval_results *irp)
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{
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#if (defined(linux) || defined(__FreeBSD__) || defined(__NetBSD__)) && \
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defined(TCP_INFO)
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socklen_t tcp_info_length = sizeof(struct tcp_info);
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if (getsockopt(sp->socket, IPPROTO_TCP, TCP_INFO, (void *)&irp->tcpInfo, &tcp_info_length) < 0)
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iperf_err(sp->test, "getsockopt - %s", strerror(errno));
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if (sp->test->debug) {
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printf("tcpi_snd_cwnd %u tcpi_snd_mss %u tcpi_rtt %u\n",
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irp->tcpInfo.tcpi_snd_cwnd, irp->tcpInfo.tcpi_snd_mss,
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irp->tcpInfo.tcpi_rtt);
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}
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#endif
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}
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/*************************************************************/
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long
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get_total_retransmits(struct iperf_interval_results *irp)
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{
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#if defined(linux) && defined(TCP_MD5SIG)
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return irp->tcpInfo.tcpi_total_retrans;
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#elif defined(__FreeBSD__) && __FreeBSD_version >= 600000
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return irp->tcpInfo.tcpi_snd_rexmitpack;
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#elif defined(__NetBSD__) && defined(TCP_INFO)
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return irp->tcpInfo.tcpi_snd_rexmitpack;
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#else
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return -1;
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#endif
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}
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/*************************************************************/
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/*
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* Return snd_cwnd in octets.
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*/
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long
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get_snd_cwnd(struct iperf_interval_results *irp)
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{
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#if defined(linux) && defined(TCP_MD5SIG)
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return irp->tcpInfo.tcpi_snd_cwnd * irp->tcpInfo.tcpi_snd_mss;
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#elif defined(__FreeBSD__) && __FreeBSD_version >= 600000
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return irp->tcpInfo.tcpi_snd_cwnd;
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#elif defined(__NetBSD__) && defined(TCP_INFO)
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return irp->tcpInfo.tcpi_snd_cwnd * irp->tcpInfo.tcpi_snd_mss;
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#else
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return -1;
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#endif
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}
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/*************************************************************/
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/*
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* Return snd_wnd in octets.
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*/
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long
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get_snd_wnd(struct iperf_interval_results *irp)
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{
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#if !defined(HAVE_TCP_INFO_SND_WND)
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return -1;
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#elif defined(linux) && defined(TCP_MD5SIG)
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return irp->tcpInfo.tcpi_snd_wnd;
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#elif defined(__FreeBSD__) && __FreeBSD_version >= 600000
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return irp->tcpInfo.tcpi_snd_wnd;
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#elif defined(__NetBSD__) && defined(TCP_INFO)
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return irp->tcpInfo.tcpi_snd_wnd * irp->tcpInfo.tcpi_snd_mss;
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#else
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return -1;
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#endif
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}
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/*************************************************************/
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/*
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* Return rtt in usec.
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*/
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long
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get_rtt(struct iperf_interval_results *irp)
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{
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#if defined(linux) && defined(TCP_MD5SIG)
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return irp->tcpInfo.tcpi_rtt;
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#elif defined(__FreeBSD__) && __FreeBSD_version >= 600000
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return irp->tcpInfo.tcpi_rtt;
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#elif defined(__NetBSD__) && defined(TCP_INFO)
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return irp->tcpInfo.tcpi_rtt;
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#else
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return -1;
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#endif
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}
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/*************************************************************/
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/*
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* Return rttvar in usec.
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*/
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long
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get_rttvar(struct iperf_interval_results *irp)
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{
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#if defined(linux) && defined(TCP_MD5SIG)
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return irp->tcpInfo.tcpi_rttvar;
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#elif defined(__FreeBSD__) && __FreeBSD_version >= 600000
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return irp->tcpInfo.tcpi_rttvar;
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#elif defined(__NetBSD__) && defined(TCP_INFO)
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return irp->tcpInfo.tcpi_rttvar;
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#else
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return -1;
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#endif
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}
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/*************************************************************/
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/*
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* Return PMTU in bytes.
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*/
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long
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get_pmtu(struct iperf_interval_results *irp)
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{
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#if defined(linux) && defined(TCP_MD5SIG)
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return irp->tcpInfo.tcpi_pmtu;
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#else
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return -1;
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#endif
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}
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/*************************************************************/
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void
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build_tcpinfo_message(struct iperf_interval_results *r, char *message)
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{
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#if defined(linux) && defined(TCP_INFO)
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sprintf(message, report_tcpInfo, r->tcpInfo.tcpi_snd_cwnd, r->tcpInfo.tcpi_snd_ssthresh,
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r->tcpInfo.tcpi_rcv_ssthresh, r->tcpInfo.tcpi_unacked, r->tcpInfo.tcpi_sacked,
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r->tcpInfo.tcpi_lost, r->tcpInfo.tcpi_retrans, r->tcpInfo.tcpi_fackets,
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r->tcpInfo.tcpi_rtt, r->tcpInfo.tcpi_reordering);
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#endif
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#if defined(__FreeBSD__) && defined(TCP_INFO)
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sprintf(message, report_tcpInfo, r->tcpInfo.tcpi_snd_cwnd,
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r->tcpInfo.tcpi_rcv_space, r->tcpInfo.tcpi_snd_ssthresh, r->tcpInfo.tcpi_rtt);
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#endif
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#if defined(__NetBSD__) && defined(TCP_INFO)
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sprintf(message, report_tcpInfo, r->tcpInfo.tcpi_snd_cwnd,
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r->tcpInfo.tcpi_rcv_space, r->tcpInfo.tcpi_snd_ssthresh, r->tcpInfo.tcpi_rtt);
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#endif
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}
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