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
58 const char *
fmt_flags(const struct bits * p,int f)59 fmt_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
71 void
print_flags_generic(int flags,const struct bits * pbits,const char * format,const char * tag_name)72 print_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
88 struct ifmap_entry *
prepare_ifmap(size_t * pifmap_size)89 prepare_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