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/param.h>
33#include <sys/protosw.h>
34#include <sys/socket.h>
35#include <sys/socketvar.h>
36#include <sys/sysctl.h>
37#include <sys/time.h>
38
39#include <net/if.h>
40#include <net/if_dl.h>
41#include <arpa/inet.h>
42#include <ifaddrs.h>
43#include <libutil.h>
44#include <netdb.h>
45#include <stdbool.h>
46#include <stdint.h>
47#include <stdio.h>
48#include <stdlib.h>
49#include <stdbool.h>
50#include <string.h>
51#include <sysexits.h>
52#include <unistd.h>
53#include <err.h>
54#include <libxo/xo.h>
55#include "netstat.h"
56#include "common.h"
57
58const char *
59fmt_flags(const struct bits *p, int f)
60{
61	static char name[33];
62	char *flags;
63
64	for (flags = name; p->b_mask; p++)
65		if (p->b_mask & f)
66			*flags++ = p->b_val;
67	*flags = '\0';
68	return (name);
69}
70
71void
72print_flags_generic(int flags, const struct bits *pbits, const char *format,
73    const char *tag_name)
74{
75	const struct bits *p;
76	char tag_fmt[64];
77
78	xo_emit(format, fmt_flags(pbits, flags));
79
80	snprintf(tag_fmt, sizeof(tag_fmt), "{le:%s/%%s}", tag_name);
81	xo_open_list(tag_name);
82	for (p = pbits; p->b_mask; p++)
83		if (p->b_mask & flags)
84			xo_emit(tag_fmt, p->b_name);
85	xo_close_list(tag_name);
86}
87
88struct ifmap_entry *
89prepare_ifmap(size_t *pifmap_size)
90{
91	int ifindex = 0, size;
92	struct ifaddrs *ifap, *ifa;
93	struct sockaddr_dl *sdl;
94
95	struct ifmap_entry *ifmap = NULL;
96	int ifmap_size = 0;
97
98	/*
99	 * Retrieve interface list at first
100	 * since we need #ifindex -> if_xname match
101	 */
102	if (getifaddrs(&ifap) != 0)
103		err(EX_OSERR, "getifaddrs");
104
105	for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
106
107		if (ifa->ifa_addr->sa_family != AF_LINK)
108			continue;
109
110		sdl = (struct sockaddr_dl *)ifa->ifa_addr;
111		ifindex = sdl->sdl_index;
112
113		if (ifindex >= ifmap_size) {
114			size = roundup2(ifindex + 1, 32) *
115			    sizeof(struct ifmap_entry);
116			if ((ifmap = realloc(ifmap, size)) == NULL)
117				errx(2, "realloc(%d) failed", size);
118			memset(&ifmap[ifmap_size], 0,
119			    size - ifmap_size *
120			    sizeof(struct ifmap_entry));
121
122			ifmap_size = roundup2(ifindex + 1, 32);
123		}
124
125		if (*ifmap[ifindex].ifname != '\0')
126			continue;
127
128		strlcpy(ifmap[ifindex].ifname, ifa->ifa_name, IFNAMSIZ);
129	}
130
131	freeifaddrs(ifap);
132
133	*pifmap_size = ifmap_size;
134
135	return (ifmap);
136}
137
138