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 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 static struct nlist nl[] = { 56 #define N_IFNET 0 57 { .n_name = "_ifnet", }, 58 { .n_name = NULL, }, 59 }; 60 61 static int 62 kread(kvm_t *kd, u_long addr, char *buffer, int size) 63 { 64 if (kd == NULL || buffer == NULL) 65 return (-1); 66 67 if (kvm_read(kd, addr, buffer, size) != size) { 68 warnx("kvm_read: %s", kvm_geterr(kd)); 69 return (-1); 70 } 71 72 return (0); 73 } 74 75 int 76 main(void) 77 { 78 kvm_t *kd; 79 char errbuf[_POSIX2_LINE_MAX]; 80 u_long ifnetaddr, ifnetaddr_next; 81 u_long ifaddraddr, ifaddraddr_next; 82 struct ifnet ifnet; 83 struct ifnethead ifnethead; 84 union { 85 struct ifaddr ifa; 86 struct in_ifaddr in; 87 struct in6_ifaddr in6; 88 } ifaddr; 89 union { 90 struct sockaddr *sa; 91 struct sockaddr_dl *sal; 92 struct sockaddr_in *sa4; 93 struct sockaddr_in6 *sa6; 94 } sa; 95 char addr[INET6_ADDRSTRLEN]; 96 97 kd = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, errbuf); 98 if (kd == NULL) { 99 warnx("kvm_openfiles: %s", errbuf); 100 exit(0); 101 } 102 103 if (kvm_nlist(kd, nl) < 0) { 104 warnx("kvm_nlist: %s", kvm_geterr(kd)); 105 goto out; 106 } 107 108 if (nl[N_IFNET].n_type == 0) { 109 warnx("kvm_nlist: no namelist"); 110 goto out; 111 } 112 113 if (kread(kd, nl[N_IFNET].n_value, 114 (char *) &ifnethead, sizeof(ifnethead)) != 0) 115 goto out; 116 117 for (ifnetaddr = (u_long) TAILQ_FIRST(&ifnethead); 118 ifnetaddr != 0; 119 ifnetaddr = ifnetaddr_next) { 120 if (kread(kd, ifnetaddr, (char *) &ifnet, sizeof(ifnet)) != 0) 121 goto out; 122 ifnetaddr_next = (u_long) TAILQ_NEXT(&ifnet, if_link); 123 124 printf("%s\n", ifnet.if_xname); 125 126 for (ifaddraddr = (u_long) TAILQ_FIRST(&ifnet.if_addrhead); 127 ifaddraddr != 0; 128 ifaddraddr = ifaddraddr_next) { 129 if (kread(kd, ifaddraddr, 130 (char *) &ifaddr, sizeof(ifaddr)) != 0) 131 goto out; 132 133 ifaddraddr_next = (u_long) 134 TAILQ_NEXT(&ifaddr.ifa, ifa_link); 135 136 sa.sa = (struct sockaddr *)( 137 (unsigned char *) ifaddr.ifa.ifa_addr - 138 (unsigned char *) ifaddraddr + 139 (unsigned char *) &ifaddr); 140 141 switch (sa.sa->sa_family) { 142 case AF_LINK: 143 switch (sa.sal->sdl_type) { 144 case IFT_ETHER: 145 case IFT_FDDI: 146 ether_ntoa_r((struct ether_addr * ) 147 LLADDR(sa.sal), addr); 148 break; 149 150 case IFT_LOOP: 151 strcpy(addr, "loopback"); 152 break; 153 154 default: 155 snprintf(addr, sizeof(addr), 156 "<Link type %#x>", 157 sa.sal->sdl_type); 158 break; 159 } 160 break; 161 162 case AF_INET: 163 inet_ntop(AF_INET, &sa.sa4->sin_addr, 164 addr, sizeof(addr)); 165 break; 166 167 case AF_INET6: 168 inet_ntop(AF_INET6, &sa.sa6->sin6_addr, 169 addr, sizeof(addr)); 170 break; 171 172 default: 173 snprintf(addr, sizeof(addr), "family=%d", 174 sa.sa->sa_family); 175 break; 176 } 177 178 printf("\t%s ifa_refcnt=%u\n", 179 addr, ifaddr.ifa.ifa_refcnt); 180 } 181 } 182 out: 183 kvm_close(kd); 184 185 return (0); 186 } 187 188