amd64 port: mainly on the pmap headers, identify_cpu and initcpu
[dragonfly/port-amd64.git] / lib / libkinfo / kinfo_net.c
blob7abd7ab1880cc6d6b474e47f7ccb5336a2c9d927
1 /*
2 * Copyright (c) 2005 The DragonFly Project. All rights reserved.
3 *
4 * This code is derived from software contributed to The DragonFly Project
5 * by Hiten Pandya <hmp@dragonflybsd.org>.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
16 * distribution.
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
34 * $DragonFly: src/lib/libkinfo/kinfo_net.c,v 1.1 2005/05/01 04:05:35 hmp Exp $
37 #include <sys/param.h>
38 #include <sys/socket.h>
39 #include <sys/sysctl.h>
41 #include <net/route.h>
43 #include <assert.h>
44 #include <stdlib.h>
45 #include <errno.h>
46 #include <kinfo.h>
48 int
49 kinfo_get_net_rtstatistics(struct rtstatistics *rts)
51 struct rtstatistics *percpu = NULL;
52 size_t len = sizeof(struct rtstatistics) * SMP_MAXCPU;
53 int cpucount, error = 0;
55 _DIAGASSERT(rts != NULL);
57 if ((percpu = malloc(len)) == NULL) {
58 error = ENOMEM;
59 goto done;
62 /* retrieve verbatim per-cpu statistics from kernel */
63 if (sysctlbyname("net.route.stats", percpu, &len, NULL, 0) < 0) {
64 error = errno;
65 goto done;
66 } else {
67 percpu = reallocf(percpu, len);
68 if (percpu == NULL) {
69 error = ENOMEM;
70 goto done;
74 /* aggregate per-cpu statistics retrieved from kernel */
75 cpucount = len / sizeof(struct rtstatistics);
76 route_pcpu_statistics(percpu, rts, cpucount);
78 done:
79 if (percpu != NULL)
80 free(percpu);
81 return (error);