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
61const char *
62fmt_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
74void
75print_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
91struct ifmap_entry *
92prepare_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 = roundup(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 = roundup(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