1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
|
/*
* iperf, Copyright (c) 2014, 2017, The Regents of the University of
* California, through Lawrence Berkeley National Laboratory (subject
* to receipt of any required approvals from the U.S. Dept. of
* Energy). All rights reserved.
*
* If you have questions about your rights to use or distribute this
* software, please contact Berkeley Lab's Technology Transfer
* Department at TTD@lbl.gov.
*
* NOTICE. This software is owned by the U.S. Department of Energy.
* As such, the U.S. Government has been granted for itself and others
* acting on its behalf a paid-up, nonexclusive, irrevocable,
* worldwide license in the Software to reproduce, prepare derivative
* works, and perform publicly and display publicly. Beginning five
* (5) years after the date permission to assert copyright is obtained
* from the U.S. Department of Energy, and subject to any subsequent
* five (5) year renewals, the U.S. Government is granted for itself
* and others acting on its behalf a paid-up, nonexclusive,
* irrevocable, worldwide license in the Software to reproduce,
* prepare derivative works, distribute copies to the public, perform
* publicly and display publicly, and to permit others to do so.
*
* This code is distributed under a BSD style license, see the LICENSE
* file for complete information.
*/
/*
* routines related to collection TCP_INFO using getsockopt()
*
* Brian Tierney, ESnet (bltierney@es.net)
*
* Note that this is only really useful on Linux.
* XXX: only standard on linux versions 2.4 and later
#
* FreeBSD has a limited implementation that only includes the following:
* tcpi_snd_ssthresh, tcpi_snd_cwnd, tcpi_rcv_space, tcpi_rtt
* Based on information on http://wiki.freebsd.org/8.0TODO, I dont think this will be
* fixed before v8.1 at the earliest.
*
* OSX has no support.
*
* I think MS Windows does support TCP_INFO, but iperf3 does not currently support Windows.
*/
#include <stdio.h>
#include <stdlib.h>
#include <sys/param.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <string.h>
#include <netinet/in.h>
#include <errno.h>
#include "iperf.h"
#include "iperf_api.h"
#include "iperf_locale.h"
/*************************************************************/
int
has_tcpinfo(void)
{
#if (defined(linux) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)) \
&& defined(TCP_INFO)
return 1;
#else
return 0;
#endif
}
/*************************************************************/
int
has_tcpinfo_retransmits(void)
{
#if defined(linux) && defined(TCP_MD5SIG)
/* TCP_MD5SIG doesn't actually have anything to do with TCP
** retransmits, it just showed up in the same rev of the header
** file. If it's present then struct tcp_info has the
** tcpi_total_retrans field that we need; if not, not.
*/
return 1;
#else
#if defined(__FreeBSD__) && __FreeBSD_version >= 600000
return 1; /* Should work now */
#elif (defined(__NetBSD__) || defined(__OpenBSD__)) && defined(TCP_INFO)
return 1;
#else
return 0;
#endif
#endif
}
/*************************************************************/
void
save_tcpinfo(struct iperf_stream *sp, struct iperf_interval_results *irp)
{
#if (defined(linux) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)) && \
defined(TCP_INFO)
socklen_t tcp_info_length = sizeof(struct tcp_info);
if (getsockopt(sp->socket, IPPROTO_TCP, TCP_INFO, (void *)&irp->tcpInfo, &tcp_info_length) < 0)
iperf_err(sp->test, "getsockopt - %s", strerror(errno));
if (sp->test->debug) {
printf("tcpi_snd_cwnd %u tcpi_snd_mss %u tcpi_rtt %u\n",
irp->tcpInfo.tcpi_snd_cwnd, irp->tcpInfo.tcpi_snd_mss,
irp->tcpInfo.tcpi_rtt);
}
#endif
}
/*************************************************************/
long
get_total_retransmits(struct iperf_interval_results *irp)
{
#if defined(linux) && defined(TCP_MD5SIG)
return irp->tcpInfo.tcpi_total_retrans;
#elif defined(__FreeBSD__) && __FreeBSD_version >= 600000
return irp->tcpInfo.tcpi_snd_rexmitpack;
#elif (defined(__NetBSD__) || defined(__OpenBSD__)) && defined(TCP_INFO)
return irp->tcpInfo.tcpi_snd_rexmitpack;
#else
return -1;
#endif
}
/*************************************************************/
/*
* Return snd_cwnd in octets.
*/
long
get_snd_cwnd(struct iperf_interval_results *irp)
{
#if defined(linux) && defined(TCP_MD5SIG)
return (long)irp->tcpInfo.tcpi_snd_cwnd * irp->tcpInfo.tcpi_snd_mss;
#elif defined(__FreeBSD__) && __FreeBSD_version >= 600000
return irp->tcpInfo.tcpi_snd_cwnd;
#elif defined(__NetBSD__) && defined(TCP_INFO)
return (long)irp->tcpInfo.tcpi_snd_cwnd * irp->tcpInfo.tcpi_snd_mss;
#elif defined(__OpenBSD__) && defined(TCP_INFO)
return irp->tcpInfo.tcpi_snd_cwnd;
#else
return -1;
#endif
}
/*************************************************************/
/*
* Return snd_wnd in octets.
*/
long
get_snd_wnd(struct iperf_interval_results *irp)
{
#if !defined(HAVE_TCP_INFO_SND_WND)
return -1;
#elif defined(linux) && defined(TCP_MD5SIG)
return irp->tcpInfo.tcpi_snd_wnd;
#elif defined(__FreeBSD__) && __FreeBSD_version >= 600000
return irp->tcpInfo.tcpi_snd_wnd;
#elif defined(__NetBSD__) && defined(TCP_INFO)
return (long)irp->tcpInfo.tcpi_snd_wnd * irp->tcpInfo.tcpi_snd_mss;
#elif defined(__OpenBSD__) && defined(TCP_INFO)
return irp->tcpInfo.tcpi_snd_wnd;
#else
return -1;
#endif
}
/*************************************************************/
/*
* Return rtt in usec.
*/
long
get_rtt(struct iperf_interval_results *irp)
{
#if defined(linux) && defined(TCP_MD5SIG)
return irp->tcpInfo.tcpi_rtt;
#elif defined(__FreeBSD__) && __FreeBSD_version >= 600000
return irp->tcpInfo.tcpi_rtt;
#elif (defined(__NetBSD__) || defined(__OpenBSD__)) && defined(TCP_INFO)
return irp->tcpInfo.tcpi_rtt;
#else
return -1;
#endif
}
/*************************************************************/
/*
* Return rttvar in usec.
*/
long
get_rttvar(struct iperf_interval_results *irp)
{
#if defined(linux) && defined(TCP_MD5SIG)
return irp->tcpInfo.tcpi_rttvar;
#elif defined(__FreeBSD__) && __FreeBSD_version >= 600000
return irp->tcpInfo.tcpi_rttvar;
#elif (defined(__NetBSD__) || defined(__OpenBSD__)) && defined(TCP_INFO)
return irp->tcpInfo.tcpi_rttvar;
#else
return -1;
#endif
}
/*************************************************************/
/*
* Return PMTU in bytes.
*/
long
get_pmtu(struct iperf_interval_results *irp)
{
#if defined(linux) && defined(TCP_MD5SIG)
return irp->tcpInfo.tcpi_pmtu;
#else
return -1;
#endif
}
/*************************************************************/
void
build_tcpinfo_message(struct iperf_interval_results *r, char *message)
{
#if defined(linux) && defined(TCP_INFO)
sprintf(message, report_tcpInfo, r->tcpInfo.tcpi_snd_cwnd, r->tcpInfo.tcpi_snd_ssthresh,
r->tcpInfo.tcpi_rcv_ssthresh, r->tcpInfo.tcpi_unacked, r->tcpInfo.tcpi_sacked,
r->tcpInfo.tcpi_lost, r->tcpInfo.tcpi_retrans, r->tcpInfo.tcpi_fackets,
r->tcpInfo.tcpi_rtt, r->tcpInfo.tcpi_reordering);
#endif
#if (defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)) && defined(TCP_INFO)
sprintf(message, report_tcpInfo, r->tcpInfo.tcpi_snd_cwnd,
r->tcpInfo.tcpi_rcv_space, r->tcpInfo.tcpi_snd_ssthresh, r->tcpInfo.tcpi_rtt);
#endif
}
|
