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 #include <sys/param.h>
34 #include <sys/protosw.h>
35 #include <sys/socket.h>
36 #include <sys/socketvar.h>
37 #include <sys/sysctl.h>
38 #include <sys/time.h>
39
40 #include <net/if.h>
41 #include <net/if_dl.h>
42 #include <arpa/inet.h>
43 #include <ifaddrs.h>
44 #include <libutil.h>
45 #include <netdb.h>
46 #include <stdbool.h>
47 #include <stdint.h>
48 #include <stdio.h>
49 #include <stdlib.h>
50 #include <stdbool.h>
51 #include <string.h>
52 #include <sysexits.h>
53 #include <unistd.h>
54 #include <err.h>
55 #include <libxo/xo.h>
56 #include "netstat.h"
57 #include "common.h"
58
59 const char *
fmt_flags(const struct bits * p,int f)60 fmt_flags(const struct bits *p, int f)
61 {
62 static char name[33];
63 char *flags;
64
65 for (flags = name; p->b_mask; p++)
66 if (p->b_mask & f)
67 *flags++ = p->b_val;
68 *flags = '\0';
69 return (name);
70 }
71
72 void
print_flags_generic(int flags,const struct bits * pbits,const char * format,const char * tag_name)73 print_flags_generic(int flags, const struct bits *pbits, const char *format,
74 const char *tag_name)
75 {
76 const struct bits *p;
77 char tag_fmt[64];
78
79 xo_emit(format, fmt_flags(pbits, flags));
80
81 snprintf(tag_fmt, sizeof(tag_fmt), "{le:%s/%%s}", tag_name);
82 xo_open_list(tag_name);
83 for (p = pbits; p->b_mask; p++)
84 if (p->b_mask & flags)
85 xo_emit(tag_fmt, p->b_name);
86 xo_close_list(tag_name);
87 }
88
89 struct ifmap_entry *
prepare_ifmap(size_t * pifmap_size)90 prepare_ifmap(size_t *pifmap_size)
91 {
92 int ifindex = 0, size;
93 struct ifaddrs *ifap, *ifa;
94 struct sockaddr_dl *sdl;
95
96 struct ifmap_entry *ifmap = NULL;
97 int ifmap_size = 0;
98
99 /*
100 * Retrieve interface list at first
101 * since we need #ifindex -> if_xname match
102 */
103 if (getifaddrs(&ifap) != 0)
104 err(EX_OSERR, "getifaddrs");
105
106 for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
107
108 if (ifa->ifa_addr->sa_family != AF_LINK)
109 continue;
110
111 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
112 ifindex = sdl->sdl_index;
113
114 if (ifindex >= ifmap_size) {
115 size = roundup2(ifindex + 1, 32) *
116 sizeof(struct ifmap_entry);
117 if ((ifmap = realloc(ifmap, size)) == NULL)
118 errx(2, "realloc(%d) failed", size);
119 memset(&ifmap[ifmap_size], 0,
120 size - ifmap_size *
121 sizeof(struct ifmap_entry));
122
123 ifmap_size = roundup2(ifindex + 1, 32);
124 }
125
126 if (*ifmap[ifindex].ifname != '\0')
127 continue;
128
129 strlcpy(ifmap[ifindex].ifname, ifa->ifa_name, IFNAMSIZ);
130 }
131
132 freeifaddrs(ifap);
133
134 *pifmap_size = ifmap_size;
135
136 return (ifmap);
137 }
138
139