1 /*
2 * Copyright (c) 2001-2007 Willem Dijkstra
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above
12 * copyright notice, this list of conditions and the following
13 * disclaimer in the documentation and/or other materials provided
14 * with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
19 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
20 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
22 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
24 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
26 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
27 * POSSIBILITY OF SUCH DAMAGE.
28 *
29 */
30
31 /*
32 * Get current interface statistics from kernel and return them in symon_buf as
33 *
34 * ipackets : opackets : ibytes : obytes : imcasts : omcasts : ierrors :
35 * oerrors : colls : drops
36 */
37
38 #include <sys/types.h>
39 #include <sys/ioctl.h>
40 #include <sys/socket.h>
41 #include <sys/sockio.h>
42
43 #include <net/if.h>
44 #include <net/if_dl.h>
45 #include <net/if_types.h>
46 #include <netinet/in.h>
47 #include <netinet/in_var.h>
48
49 #include <errno.h>
50 #include <limits.h>
51 #include <string.h>
52
53 #include "error.h"
54 #include "symon.h"
55
56 /* Globals for this module start with if_ */
57 static int if_s = -1;
58
59 void
init_if(struct stream * st)60 init_if(struct stream *st)
61 {
62 if (if_s == -1) {
63 if ((if_s = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
64 fatal("%s:%d: socket failed, %.200",
65 __FILE__, __LINE__, strerror(errno));
66 }
67 }
68
69 strncpy(st->parg.ifr.ifr_name, st->arg, IFNAMSIZ - 1);
70 st->parg.ifr.ifr_name[IFNAMSIZ - 1] = '\0';
71
72 info("started module if(%.200s)", st->arg);
73 }
74
75 void
gets_if()76 gets_if()
77 {
78 /* EMPTY */
79 }
80
81 int
get_if(char * symon_buf,int maxlen,struct stream * st)82 get_if(char *symon_buf, int maxlen, struct stream *st)
83 {
84 struct if_data ifdata;
85
86 st->parg.ifr.ifr_data = (caddr_t) &ifdata;
87
88 if (ioctl(if_s, SIOCGIFDATA, &st->parg.ifr)) {
89 warning("if(%.200s) failed (ioctl error)", st->arg);
90 return 0;
91 }
92
93 return snpack(symon_buf, maxlen, st->arg, MT_IF2,
94 (u_int64_t) ifdata.ifi_ipackets,
95 (u_int64_t) ifdata.ifi_opackets,
96 (u_int64_t) ifdata.ifi_ibytes,
97 (u_int64_t) ifdata.ifi_obytes,
98 (u_int64_t) ifdata.ifi_imcasts,
99 (u_int64_t) ifdata.ifi_omcasts,
100 (u_int64_t) ifdata.ifi_ierrors,
101 (u_int64_t) ifdata.ifi_oerrors,
102 (u_int64_t) ifdata.ifi_collisions,
103 (u_int64_t) ifdata.ifi_iqdrops);
104 }
105