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- /*
- * Copyright (c) 2005 Fredrik Soderblom
- * Copyright (c) 2005-2007 Willem Dijkstra
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * - Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * - Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following
- * disclaimer in the documentation and/or other materials provided
- * with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- */
- /*
- * Get current interface statistics from kernel and return them in symon_buf as
- *
- * ipackets : opackets : ibytes : obytes : imcasts : omcasts : ierrors :
- * oerrors : colls : drops
- */
- #include <sys/types.h>
- #include <sys/ioctl.h>
- #include <sys/socket.h>
- #include <sys/sockio.h>
- #include <sys/sysctl.h>
- #include <net/if.h>
- #include <net/if_mib.h>
- #include <errno.h>
- #include <limits.h>
- #include <string.h>
- #include "error.h"
- #include "symon.h"
- #include "xmalloc.h"
- /* Globals for this module start with if_ */
- static int if_cur = 0;
- static int if_max = 0;
- struct ifmibdata *if_md = NULL;
- void
- init_if(struct stream *st)
- {
- info("started module if(%.200s)", st->arg);
- }
- int
- get_ifcount(void)
- {
- int name[5] = {CTL_NET, PF_LINK, NETLINK_GENERIC, IFMIB_SYSTEM, IFMIB_IFCOUNT};
- int count;
- size_t len;
- len = sizeof(int);
- if (sysctl(name, 5, &count, &len, NULL, 0) != -1) {
- return count;
- } else {
- return -1;
- }
- }
- int
- get_ifmib_general(int row, struct ifmibdata *ifmd)
- {
- int name[6] = {CTL_NET, PF_LINK, NETLINK_GENERIC, IFMIB_IFDATA, row, IFDATA_GENERAL};
- size_t len;
- len = sizeof(*ifmd);
- return sysctl(name, 6, ifmd, &len, (void *)0, 0);
- }
- void
- gets_if()
- {
- int i;
- /* how much memory is needed */
- if_cur = get_ifcount();
- /* increase buffers if necessary */
- if (if_cur > if_max) {
- if_max = if_cur;
- if (if_max > SYMON_MAX_DOBJECTS) {
- fatal("%s:%d: dynamic object limit (%d) exceeded for ifmibdata structures",
- __FILE__, __LINE__, SYMON_MAX_DOBJECTS);
- }
- if_md = xrealloc(if_md, if_max * sizeof(struct ifmibdata));
- }
- /* read data */
- for (i = 1; i <= if_cur; i++) {
- get_ifmib_general(i, &if_md[i - 1]);
- }
- }
- int
- get_if(char *symon_buf, int maxlen, struct stream *st)
- {
- int i;
- struct if_data ifdata;
- for (i = 1; i <= if_cur; i++) {
- if (!strcmp(if_md[i - 1].ifmd_name, st->arg)) {
- ifdata = if_md[i - 1].ifmd_data;
- return snpack(symon_buf, maxlen, st->arg, MT_IF2,
- (u_int64_t) ifdata.ifi_ipackets,
- (u_int64_t) ifdata.ifi_opackets,
- (u_int64_t) ifdata.ifi_ibytes,
- (u_int64_t) ifdata.ifi_obytes,
- (u_int64_t) ifdata.ifi_imcasts,
- (u_int64_t) ifdata.ifi_omcasts,
- (u_int64_t) ifdata.ifi_ierrors,
- (u_int64_t) ifdata.ifi_oerrors,
- (u_int64_t) ifdata.ifi_collisions,
- (u_int64_t) ifdata.ifi_iqdrops);
- }
- }
- return 0;
- }
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