95 lines
2.5 KiB
C
95 lines
2.5 KiB
C
/* $Id: getifstats.c,v 1.6 2012/02/11 13:10:57 nanard Exp $ */
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/*
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* MiniUPnP project
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* http://miniupnp.free.fr/ or http://miniupnp.tuxfamily.org/
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* (c) 2009 Jardel Weyrich
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* This software is subject to the conditions detailed
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* in the LICENCE file provided within the distribution
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*/
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#include <syslog.h>
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#include <sys/sysctl.h>
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#include <sys/types.h>
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#include <netinet/in.h>
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#include <net/if.h>
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#include <net/if_types.h>
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#include <net/route.h>
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#include <nlist.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "../getifstats.h"
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#include "../config.h"
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int getifstats(const char * ifname, struct ifdata * data) {
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int mib[] = { CTL_NET, PF_ROUTE, 0, AF_INET, NET_RT_IFLIST, if_nametoindex(ifname) };
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const size_t mib_len = sizeof(mib) / sizeof(mib[0]);
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size_t needed;
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char *buf, *end, *p;
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struct if_msghdr *ifm;
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struct if_data ifdata;
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#ifdef ENABLE_GETIFSTATS_CACHING
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static time_t cache_timestamp = 0;
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static struct ifdata cache_data;
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time_t current_time;
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#endif
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if (data == NULL || ifname == NULL || ifname[0] == '\0')
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return -1; /* error */
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data->baudrate = 4200000;
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data->opackets = 0;
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data->ipackets = 0;
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data->obytes = 0;
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data->ibytes = 0;
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#ifdef ENABLE_GETIFSTATS_CACHING
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current_time = time(NULL);
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if (current_time == ((time_t)-1)) {
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syslog(LOG_ERR, "getifstats() : time() error : %m");
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} else {
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if (current_time < cache_timestamp + GETIFSTATS_CACHING_DURATION) {
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memcpy(data, &cache_data, sizeof(struct ifdata));
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return 0;
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}
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}
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#endif
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if (sysctl(mib, mib_len, NULL, &needed, NULL, 0) == -1) {
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syslog(LOG_ERR, "sysctl(): %m");
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return -1;
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}
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buf = (char *) malloc(needed);
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if (buf == NULL)
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return -1; /* error */
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if (sysctl(mib, mib_len, buf, &needed, NULL, 0) == -1) {
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syslog(LOG_ERR, "sysctl(): %m");
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free(buf);
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return -1; /* error */
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} else {
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for (end = buf + needed, p = buf; p < end; p += ifm->ifm_msglen) {
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ifm = (struct if_msghdr *) p;
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if (ifm->ifm_type == RTM_IFINFO && ifm->ifm_data.ifi_type == IFT_ETHER) {
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ifdata = ifm->ifm_data;
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data->opackets = ifdata.ifi_opackets;
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data->ipackets = ifdata.ifi_ipackets;
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data->obytes = ifdata.ifi_obytes;
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data->ibytes = ifdata.ifi_ibytes;
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data->baudrate = ifdata.ifi_baudrate;
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free(buf);
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#ifdef ENABLE_GETIFSTATS_CACHING
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if (current_time!=((time_t)-1)) {
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cache_timestamp = current_time;
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memcpy(&cache_data, data, sizeof(struct ifdata));
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}
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#endif
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return 0; /* found, ok */
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}
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}
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}
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free(buf);
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return -1; /* not found or error */
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}
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