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: 10 * 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. 20 * 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. 33 * 34 * $DragonFly: src/lib/libkinfo/kinfo_net.c,v 1.1 2005/05/01 04:05:35 hmp Exp $ 35 */ 36 37 #include <sys/kinfo.h> 38 #include <sys/param.h> 39 #include <sys/socket.h> 40 #include <sys/sysctl.h> 41 42 #include <net/route.h> 43 44 #include <assert.h> 45 #include <stdlib.h> 46 #include <errno.h> 47 #include <kinfo.h> 48 49 int 50 kinfo_get_net_rtstatistics(struct rtstatistics *rts) 51 { 52 struct rtstatistics *percpu = NULL; 53 size_t len = sizeof(struct rtstatistics) * SMP_MAXCPU; 54 int cpucount, error = 0; 55 56 _DIAGASSERT(rts != NULL); 57 58 if ((percpu = malloc(len)) == NULL) { 59 error = ENOMEM; 60 goto done; 61 } 62 63 /* retrieve verbatim per-cpu statistics from kernel */ 64 if (sysctlbyname("net.route.stats", percpu, &len, NULL, 0) < 0) { 65 error = errno; 66 goto done; 67 } else { 68 percpu = reallocf(percpu, len); 69 if (percpu == NULL) { 70 error = ENOMEM; 71 goto done; 72 } 73 } 74 75 /* aggregate per-cpu statistics retrieved from kernel */ 76 cpucount = len / sizeof(struct rtstatistics); 77 route_pcpu_statistics(percpu, rts, cpucount); 78 79 done: 80 if (percpu != NULL) 81 free(percpu); 82 return (error); 83 } 84