1 /*- 2 * Copyright (c) 2012 maksim yevmenkin <emax@freebsd.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted providing that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 16 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 18 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 22 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 23 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 24 * POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 /* gcc -Wall -ggdb ifpifa.c -lkvm -o ifpifa */ 28 29 #include <sys/types.h> 30 #include <sys/callout.h> 31 #include <sys/cdefs.h> 32 #include <sys/param.h> 33 #include <sys/protosw.h> 34 #include <sys/queue.h> 35 #include <sys/socket.h> 36 #include <sys/socketvar.h> 37 38 #include <net/if.h> 39 #include <net/if_var.h> 40 #include <net/if_dl.h> 41 #include <net/if_types.h> 42 #include <net/ethernet.h> 43 #include <netinet/in.h> 44 #include <netinet/in_var.h> 45 #include <arpa/inet.h> 46 47 #include <err.h> 48 #include <fcntl.h> 49 #include <kvm.h> 50 #include <limits.h> 51 #include <nlist.h> 52 #include <stdio.h> 53 #include <stdlib.h> 54 #include <string.h> 55 56 __FBSDID("$FreeBSD$"); 57 58 static struct nlist nl[] = { 59 #define N_IFNET 0 60 { .n_name = "_ifnet", }, 61 { .n_name = NULL, }, 62 }; 63 64 static int 65 kread(kvm_t *kd, u_long addr, char *buffer, int size) 66 { 67 if (kd == NULL || buffer == NULL) 68 return (-1); 69 70 if (kvm_read(kd, addr, buffer, size) != size) { 71 warnx("kvm_read: %s", kvm_geterr(kd)); 72 return (-1); 73 } 74 75 return (0); 76 } 77 78 int 79 main(void) 80 { 81 kvm_t *kd; 82 char errbuf[_POSIX2_LINE_MAX]; 83 u_long ifnetaddr, ifnetaddr_next; 84 u_long ifaddraddr, ifaddraddr_next; 85 struct ifnet ifnet; 86 struct ifnethead ifnethead; 87 union { 88 struct ifaddr ifa; 89 struct in_ifaddr in; 90 struct in6_ifaddr in6; 91 } ifaddr; 92 union { 93 struct sockaddr *sa; 94 struct sockaddr_dl *sal; 95 struct sockaddr_in *sa4; 96 struct sockaddr_in6 *sa6; 97 } sa; 98 char addr[INET6_ADDRSTRLEN]; 99 100 kd = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, errbuf); 101 if (kd == NULL) { 102 warnx("kvm_openfiles: %s", errbuf); 103 exit(0); 104 } 105 106 if (kvm_nlist(kd, nl) < 0) { 107 warnx("kvm_nlist: %s", kvm_geterr(kd)); 108 goto out; 109 } 110 111 if (nl[N_IFNET].n_type == 0) { 112 warnx("kvm_nlist: no namelist"); 113 goto out; 114 } 115 116 if (kread(kd, nl[N_IFNET].n_value, 117 (char *) &ifnethead, sizeof(ifnethead)) != 0) 118 goto out; 119 120 for (ifnetaddr = (u_long) TAILQ_FIRST(&ifnethead); 121 ifnetaddr != 0; 122 ifnetaddr = ifnetaddr_next) { 123 if (kread(kd, ifnetaddr, (char *) &ifnet, sizeof(ifnet)) != 0) 124 goto out; 125 ifnetaddr_next = (u_long) TAILQ_NEXT(&ifnet, if_link); 126 127 printf("%s\n", ifnet.if_xname); 128 129 for (ifaddraddr = (u_long) TAILQ_FIRST(&ifnet.if_addrhead); 130 ifaddraddr != 0; 131 ifaddraddr = ifaddraddr_next) { 132 if (kread(kd, ifaddraddr, 133 (char *) &ifaddr, sizeof(ifaddr)) != 0) 134 goto out; 135 136 ifaddraddr_next = (u_long) 137 TAILQ_NEXT(&ifaddr.ifa, ifa_link); 138 139 sa.sa = (struct sockaddr *)( 140 (unsigned char *) ifaddr.ifa.ifa_addr - 141 (unsigned char *) ifaddraddr + 142 (unsigned char *) &ifaddr); 143 144 switch (sa.sa->sa_family) { 145 case AF_LINK: 146 switch (sa.sal->sdl_type) { 147 case IFT_ETHER: 148 case IFT_FDDI: 149 ether_ntoa_r((struct ether_addr * ) 150 LLADDR(sa.sal), addr); 151 break; 152 153 case IFT_LOOP: 154 strcpy(addr, "loopback"); 155 break; 156 157 default: 158 snprintf(addr, sizeof(addr), 159 "<Link type %#x>", 160 sa.sal->sdl_type); 161 break; 162 } 163 break; 164 165 case AF_INET: 166 inet_ntop(AF_INET, &sa.sa4->sin_addr, 167 addr, sizeof(addr)); 168 break; 169 170 case AF_INET6: 171 inet_ntop(AF_INET6, &sa.sa6->sin6_addr, 172 addr, sizeof(addr)); 173 break; 174 175 default: 176 snprintf(addr, sizeof(addr), "family=%d", 177 sa.sa->sa_family); 178 break; 179 } 180 181 printf("\t%s ifa_refcnt=%u\n", 182 addr, ifaddr.ifa.ifa_refcnt); 183 } 184 } 185 out: 186 kvm_close(kd); 187 188 return (0); 189 } 190 191