mirror of
https://github.com/freebsd/freebsd-src
synced 2024-10-17 22:04:40 +00:00
Add a very simple debug tool that would dump list of interfaces,
addresses on each interface, and, associated refcounter. I found it handy to check for address refcounter leaks.
This commit is contained in:
parent
30852968ef
commit
f8986f6838
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=236644
10
tools/tools/ifpifa/Makefile
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10
tools/tools/ifpifa/Makefile
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# $FreeBSD$
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PROG= ifpifa
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NO_MAN=
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WARNS?=6
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BINDIR?=/usr/local/bin
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DPADD=${LIBKVM}
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LDADD=-lkvm
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.include <bsd.prog.mk>
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190
tools/tools/ifpifa/ifpifa.c
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190
tools/tools/ifpifa/ifpifa.c
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/*-
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* Copyright (c) 2012 maksim yevmenkin <emax@freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/* gcc -Wall -ggdb ifpifa.c -lkvm -o ifpifa */
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#include <sys/types.h>
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#include <sys/callout.h>
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#include <sys/cdefs.h>
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#include <sys/param.h>
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#include <sys/protosw.h>
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#include <sys/queue.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <net/if.h>
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#include <net/if_var.h>
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#include <net/if_dl.h>
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#include <net/if_types.h>
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#include <net/ethernet.h>
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#include <netinet/in.h>
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#include <netinet/in_var.h>
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#include <arpa/inet.h>
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#include <err.h>
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#include <fcntl.h>
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#include <kvm.h>
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#include <limits.h>
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#include <nlist.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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__FBSDID("$FreeBSD$");
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static struct nlist nl[] = {
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#define N_IFNET 0
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{ .n_name = "_ifnet", },
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{ .n_name = NULL, },
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};
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static int
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kread(kvm_t *kd, u_long addr, char *buffer, int size)
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{
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if (kd == NULL || buffer == NULL)
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return (-1);
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if (kvm_read(kd, addr, buffer, size) != size) {
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warnx("kvm_read: %s", kvm_geterr(kd));
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return (-1);
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}
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return (0);
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}
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int
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main(void)
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{
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kvm_t *kd;
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char errbuf[_POSIX2_LINE_MAX];
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u_long ifnetaddr, ifnetaddr_next;
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u_long ifaddraddr, ifaddraddr_next;
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struct ifnet ifnet;
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struct ifnethead ifnethead;
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union {
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struct ifaddr ifa;
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struct in_ifaddr in;
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struct in6_ifaddr in6;
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} ifaddr;
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union {
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struct sockaddr *sa;
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struct sockaddr_dl *sal;
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struct sockaddr_in *sa4;
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struct sockaddr_in6 *sa6;
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} sa;
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char addr[INET6_ADDRSTRLEN];
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kd = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, errbuf);
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if (kd == NULL) {
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warnx("kvm_openfiles: %s", errbuf);
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exit(0);
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}
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if (kvm_nlist(kd, nl) < 0) {
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warnx("kvm_nlist: %s", kvm_geterr(kd));
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goto out;
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}
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if (nl[N_IFNET].n_type == 0) {
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warnx("kvm_nlist: no namelist");
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goto out;
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}
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if (kread(kd, nl[N_IFNET].n_value,
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(char *) &ifnethead, sizeof(ifnethead)) != 0)
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goto out;
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for (ifnetaddr = (u_long) TAILQ_FIRST(&ifnethead);
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ifnetaddr != 0;
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ifnetaddr = ifnetaddr_next) {
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if (kread(kd, ifnetaddr, (char *) &ifnet, sizeof(ifnet)) != 0)
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goto out;
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ifnetaddr_next = (u_long) TAILQ_NEXT(&ifnet, if_link);
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printf("%s\n", ifnet.if_xname);
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for (ifaddraddr = (u_long) TAILQ_FIRST(&ifnet.if_addrhead);
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ifaddraddr != 0;
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ifaddraddr = ifaddraddr_next) {
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if (kread(kd, ifaddraddr,
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(char *) &ifaddr, sizeof(ifaddr)) != 0)
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goto out;
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ifaddraddr_next = (u_long)
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TAILQ_NEXT(&ifaddr.ifa, ifa_link);
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sa.sa = (struct sockaddr *)(
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(unsigned char *) ifaddr.ifa.ifa_addr -
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(unsigned char *) ifaddraddr +
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(unsigned char *) &ifaddr);
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switch (sa.sa->sa_family) {
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case AF_LINK:
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switch (sa.sal->sdl_type) {
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case IFT_ETHER:
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case IFT_FDDI:
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ether_ntoa_r((struct ether_addr * )
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LLADDR(sa.sal), addr);
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break;
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case IFT_LOOP:
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strcpy(addr, "loopback");
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break;
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default:
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snprintf(addr, sizeof(addr),
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"<Link type %#x>",
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sa.sal->sdl_type);
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break;
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}
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break;
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case AF_INET:
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inet_ntop(AF_INET, &sa.sa4->sin_addr,
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addr, sizeof(addr));
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break;
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case AF_INET6:
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inet_ntop(AF_INET6, &sa.sa6->sin6_addr,
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addr, sizeof(addr));
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break;
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default:
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snprintf(addr, sizeof(addr), "family=%d",
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sa.sa->sa_family);
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break;
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}
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printf("\t%s ifa_refcnt=%u\n",
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addr, ifaddr.ifa.ifa_refcnt);
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}
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}
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out:
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kvm_close(kd);
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return (0);
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}
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