1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1983, 1988, 1993 5 * The Regents of the University of California. All rights reserved. 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 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include <sys/param.h> 36 #include <sys/protosw.h> 37 #include <sys/socket.h> 38 #include <sys/socketvar.h> 39 #include <sys/sysctl.h> 40 #include <sys/time.h> 41 42 #include <net/if.h> 43 #include <net/if_dl.h> 44 #include <arpa/inet.h> 45 #include <ifaddrs.h> 46 #include <libutil.h> 47 #include <netdb.h> 48 #include <stdbool.h> 49 #include <stdint.h> 50 #include <stdio.h> 51 #include <stdlib.h> 52 #include <stdbool.h> 53 #include <string.h> 54 #include <sysexits.h> 55 #include <unistd.h> 56 #include <err.h> 57 #include <libxo/xo.h> 58 #include "netstat.h" 59 #include "common.h" 60 61 const char * 62 fmt_flags(const struct bits *p, int f) 63 { 64 static char name[33]; 65 char *flags; 66 67 for (flags = name; p->b_mask; p++) 68 if (p->b_mask & f) 69 *flags++ = p->b_val; 70 *flags = '\0'; 71 return (name); 72 } 73 74 void 75 print_flags_generic(int flags, const struct bits *pbits, const char *format, 76 const char *tag_name) 77 { 78 const struct bits *p; 79 char tag_fmt[64]; 80 81 xo_emit(format, fmt_flags(pbits, flags)); 82 83 snprintf(tag_fmt, sizeof(tag_fmt), "{le:%s/%%s}", tag_name); 84 xo_open_list(tag_name); 85 for (p = pbits; p->b_mask; p++) 86 if (p->b_mask & flags) 87 xo_emit(tag_fmt, p->b_name); 88 xo_close_list(tag_name); 89 } 90 91 struct ifmap_entry * 92 prepare_ifmap(size_t *pifmap_size) 93 { 94 int ifindex = 0, size; 95 struct ifaddrs *ifap, *ifa; 96 struct sockaddr_dl *sdl; 97 98 struct ifmap_entry *ifmap = NULL; 99 int ifmap_size = 0; 100 101 /* 102 * Retrieve interface list at first 103 * since we need #ifindex -> if_xname match 104 */ 105 if (getifaddrs(&ifap) != 0) 106 err(EX_OSERR, "getifaddrs"); 107 108 for (ifa = ifap; ifa; ifa = ifa->ifa_next) { 109 110 if (ifa->ifa_addr->sa_family != AF_LINK) 111 continue; 112 113 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 114 ifindex = sdl->sdl_index; 115 116 if (ifindex >= ifmap_size) { 117 size = roundup2(ifindex + 1, 32) * 118 sizeof(struct ifmap_entry); 119 if ((ifmap = realloc(ifmap, size)) == NULL) 120 errx(2, "realloc(%d) failed", size); 121 memset(&ifmap[ifmap_size], 0, 122 size - ifmap_size * 123 sizeof(struct ifmap_entry)); 124 125 ifmap_size = roundup2(ifindex + 1, 32); 126 } 127 128 if (*ifmap[ifindex].ifname != '\0') 129 continue; 130 131 strlcpy(ifmap[ifindex].ifname, ifa->ifa_name, IFNAMSIZ); 132 } 133 134 freeifaddrs(ifap); 135 136 *pifmap_size = ifmap_size; 137 138 return (ifmap); 139 } 140 141