release/src/router/miniupnpd/bsd/getifstats.c

   1 /* MiniUPnP project
   2  * http://miniupnp.free.fr/ or http://miniupnp.tuxfamily.org/
   3  * author: Gleb Smirnoff <glebius@FreeBSD.org>
   4  * (c) 2006 Ryan Wagoner
   5  * (c) 2014 Gleb Smirnoff
   6  * This software is subject to the conditions detailed
   7  * in the LICENCE file provided within the distribution */
   8
   9 #include <sys/types.h>
  10 #include <sys/socket.h>
  11 #include <net/if.h>
  12 #include <errno.h>
  13 #include <ifaddrs.h>
  14 #include <string.h>
  15 #include <syslog.h>
  16
  17 #ifdef ENABLE_GETIFSTATS_CACHING
  18 #include <time.h>
  19 #endif
  20
  21 #include "../getifstats.h"
  22 #include "../config.h"
  23
  24 int
  25 getifstats(const char *ifname, struct ifdata *data)
  26 {
  27         static struct ifaddrs *ifap, *ifa;
  28 #ifdef ENABLE_GETIFSTATS_CACHING
  29         static time_t cache_timestamp;
  30         time_t current_time;
  31 #endif
  32         if(!data)
  33                 return -1;
  34         data->baudrate = 4200000;
  35         data->opackets = 0;
  36         data->ipackets = 0;
  37         data->obytes = 0;
  38         data->ibytes = 0;
  39         if(!ifname || ifname[0]=='\0')
  40                 return -1;
  41
  42 #ifdef ENABLE_GETIFSTATS_CACHING
  43         current_time = time(NULL);
  44         if (ifap != NULL &&
  45             current_time < cache_timestamp + GETIFSTATS_CACHING_DURATION)
  46                 goto copy;
  47 #endif
  48
  49         if (ifap != NULL) {
  50                 freeifaddrs(ifap);
  51                 ifap = NULL;
  52         }
  53
  54         if (getifaddrs(&ifap) != 0) {
  55                 syslog (LOG_ERR, "getifstats() : getifaddrs(): %s",
  56                     strerror(errno));
  57                 return (-1);
  58         }
  59
  60         for (ifa = ifap; ifa; ifa = ifa->ifa_next)
  61                 if (ifa->ifa_addr->sa_family == AF_LINK &&
  62                     strcmp(ifa->ifa_name, ifname) == 0) {
  63 #ifdef ENABLE_GETIFSTATS_CACHING
  64                         cache_timestamp = current_time;
  65 copy:
  66 #endif
  67 #define IFA_STAT(s)     (((struct if_data *)ifa->ifa_data)->ifi_ ## s)
  68                         data->opackets = IFA_STAT(opackets);
  69                         data->ipackets = IFA_STAT(ipackets);
  70                         data->obytes = IFA_STAT(obytes);
  71                         data->ibytes = IFA_STAT(ibytes);
  72                         data->baudrate = IFA_STAT(baudrate);
  73                         return (0);
  74                 }
  75
  76         return (-1);
  77 }