Annotation of embedaddon/iperf/src/tcp_info.c, revision 1.1.1.2
1.1 misho 1: /*
1.1.1.2 ! misho 2: * iperf, Copyright (c) 2014, 2017, The Regents of the University of
1.1 misho 3: * California, through Lawrence Berkeley National Laboratory (subject
4: * to receipt of any required approvals from the U.S. Dept. of
5: * Energy). All rights reserved.
6: *
7: * If you have questions about your rights to use or distribute this
8: * software, please contact Berkeley Lab's Technology Transfer
9: * Department at TTD@lbl.gov.
10: *
11: * NOTICE. This software is owned by the U.S. Department of Energy.
12: * As such, the U.S. Government has been granted for itself and others
13: * acting on its behalf a paid-up, nonexclusive, irrevocable,
14: * worldwide license in the Software to reproduce, prepare derivative
15: * works, and perform publicly and display publicly. Beginning five
16: * (5) years after the date permission to assert copyright is obtained
17: * from the U.S. Department of Energy, and subject to any subsequent
18: * five (5) year renewals, the U.S. Government is granted for itself
19: * and others acting on its behalf a paid-up, nonexclusive,
20: * irrevocable, worldwide license in the Software to reproduce,
21: * prepare derivative works, distribute copies to the public, perform
22: * publicly and display publicly, and to permit others to do so.
23: *
24: * This code is distributed under a BSD style license, see the LICENSE
25: * file for complete information.
26: */
27:
28: /*
29: * routines related to collection TCP_INFO using getsockopt()
30: *
31: * Brian Tierney, ESnet (bltierney@es.net)
32: *
33: * Note that this is only really useful on Linux.
34: * XXX: only standard on linux versions 2.4 and later
35: #
36: * FreeBSD has a limitted implementation that only includes the following:
37: * tcpi_snd_ssthresh, tcpi_snd_cwnd, tcpi_rcv_space, tcpi_rtt
38: * Based on information on http://wiki.freebsd.org/8.0TODO, I dont think this will be
39: * fixed before v8.1 at the earliest.
40: *
41: * OSX has no support.
42: *
43: * I think MS Windows does support TCP_INFO, but iperf3 does not currently support Windows.
44: */
45:
46: #include <stdio.h>
47: #include <stdlib.h>
48: #include <sys/param.h>
49: #include <sys/types.h>
50: #include <sys/socket.h>
51: #include <string.h>
52: #include <netinet/in.h>
53: #include <errno.h>
54:
55: #include "iperf.h"
56: #include "iperf_api.h"
57: #include "iperf_locale.h"
58:
59: /*************************************************************/
60: int
61: has_tcpinfo(void)
62: {
63: #if (defined(linux) || defined(__FreeBSD__) || defined(__NetBSD__)) \
64: && defined(TCP_INFO)
65: return 1;
66: #else
67: return 0;
68: #endif
69: }
70:
71: /*************************************************************/
72: int
73: has_tcpinfo_retransmits(void)
74: {
75: #if defined(linux) && defined(TCP_MD5SIG)
76: /* TCP_MD5SIG doesn't actually have anything to do with TCP
77: ** retransmits, it just showed up in the same rev of the header
78: ** file. If it's present then struct tcp_info has the
79: ** tcpi_total_retrans field that we need; if not, not.
80: */
81: return 1;
82: #else
83: #if defined(__FreeBSD__) && __FreeBSD_version >= 600000
84: return 1; /* Should work now */
85: #elif defined(__NetBSD__) && defined(TCP_INFO)
86: return 1;
87: #else
88: return 0;
89: #endif
90: #endif
91: }
92:
93: /*************************************************************/
94: void
95: save_tcpinfo(struct iperf_stream *sp, struct iperf_interval_results *irp)
96: {
97: #if (defined(linux) || defined(__FreeBSD__) || defined(__NetBSD__)) && \
98: defined(TCP_INFO)
99: socklen_t tcp_info_length = sizeof(struct tcp_info);
100:
101: if (getsockopt(sp->socket, IPPROTO_TCP, TCP_INFO, (void *)&irp->tcpInfo, &tcp_info_length) < 0)
102: iperf_err(sp->test, "getsockopt - %s", strerror(errno));
103:
104: if (sp->test->debug) {
105: printf("tcpi_snd_cwnd %u tcpi_snd_mss %u tcpi_rtt %u\n",
106: irp->tcpInfo.tcpi_snd_cwnd, irp->tcpInfo.tcpi_snd_mss,
107: irp->tcpInfo.tcpi_rtt);
108: }
109:
110: #endif
111: }
112:
113: /*************************************************************/
114: long
115: get_total_retransmits(struct iperf_interval_results *irp)
116: {
117: #if defined(linux) && defined(TCP_MD5SIG)
118: return irp->tcpInfo.tcpi_total_retrans;
119: #elif defined(__FreeBSD__) && __FreeBSD_version >= 600000
120: return irp->tcpInfo.tcpi_snd_rexmitpack;
121: #elif defined(__NetBSD__) && defined(TCP_INFO)
122: return irp->tcpInfo.tcpi_snd_rexmitpack;
123: #else
124: return -1;
125: #endif
126: }
127:
128: /*************************************************************/
129: /*
130: * Return snd_cwnd in octets.
131: */
132: long
133: get_snd_cwnd(struct iperf_interval_results *irp)
134: {
135: #if defined(linux) && defined(TCP_MD5SIG)
136: return irp->tcpInfo.tcpi_snd_cwnd * irp->tcpInfo.tcpi_snd_mss;
137: #elif defined(__FreeBSD__) && __FreeBSD_version >= 600000
1.1.1.2 ! misho 138: return irp->tcpInfo.tcpi_snd_cwnd;
1.1 misho 139: #elif defined(__NetBSD__) && defined(TCP_INFO)
140: return irp->tcpInfo.tcpi_snd_cwnd * irp->tcpInfo.tcpi_snd_mss;
141: #else
142: return -1;
143: #endif
144: }
145:
146: /*************************************************************/
147: /*
148: * Return rtt in usec.
149: */
150: long
151: get_rtt(struct iperf_interval_results *irp)
152: {
153: #if defined(linux) && defined(TCP_MD5SIG)
154: return irp->tcpInfo.tcpi_rtt;
155: #elif defined(__FreeBSD__) && __FreeBSD_version >= 600000
156: return irp->tcpInfo.tcpi_rtt;
157: #elif defined(__NetBSD__) && defined(TCP_INFO)
158: return irp->tcpInfo.tcpi_rtt;
159: #else
160: return -1;
161: #endif
162: }
163:
164: /*************************************************************/
1.1.1.2 ! misho 165: /*
! 166: * Return rttvar in usec.
! 167: */
! 168: long
! 169: get_rttvar(struct iperf_interval_results *irp)
! 170: {
! 171: #if defined(linux) && defined(TCP_MD5SIG)
! 172: return irp->tcpInfo.tcpi_rttvar;
! 173: #elif defined(__FreeBSD__) && __FreeBSD_version >= 600000
! 174: return irp->tcpInfo.tcpi_rttvar;
! 175: #elif defined(__NetBSD__) && defined(TCP_INFO)
! 176: return irp->tcpInfo.tcpi_rttvar;
! 177: #else
! 178: return -1;
! 179: #endif
! 180: }
! 181:
! 182: /*************************************************************/
! 183: /*
! 184: * Return PMTU in bytes.
! 185: */
! 186: long
! 187: get_pmtu(struct iperf_interval_results *irp)
! 188: {
! 189: #if defined(linux) && defined(TCP_MD5SIG)
! 190: return irp->tcpInfo.tcpi_pmtu;
! 191: #else
! 192: return -1;
! 193: #endif
! 194: }
! 195:
! 196: /*************************************************************/
1.1 misho 197: void
198: build_tcpinfo_message(struct iperf_interval_results *r, char *message)
199: {
1.1.1.2 ! misho 200: #if defined(linux) && defined(TCP_INFO)
1.1 misho 201: sprintf(message, report_tcpInfo, r->tcpInfo.tcpi_snd_cwnd, r->tcpInfo.tcpi_snd_ssthresh,
202: r->tcpInfo.tcpi_rcv_ssthresh, r->tcpInfo.tcpi_unacked, r->tcpInfo.tcpi_sacked,
203: r->tcpInfo.tcpi_lost, r->tcpInfo.tcpi_retrans, r->tcpInfo.tcpi_fackets,
204: r->tcpInfo.tcpi_rtt, r->tcpInfo.tcpi_reordering);
205: #endif
1.1.1.2 ! misho 206: #if defined(__FreeBSD__) && defined(TCP_INFO)
1.1 misho 207: sprintf(message, report_tcpInfo, r->tcpInfo.tcpi_snd_cwnd,
208: r->tcpInfo.tcpi_rcv_space, r->tcpInfo.tcpi_snd_ssthresh, r->tcpInfo.tcpi_rtt);
209: #endif
210: #if defined(__NetBSD__) && defined(TCP_INFO)
211: sprintf(message, report_tcpInfo, r->tcpInfo.tcpi_snd_cwnd,
212: r->tcpInfo.tcpi_rcv_space, r->tcpInfo.tcpi_snd_ssthresh, r->tcpInfo.tcpi_rtt);
213: #endif
214: }
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