tstamping.c

   1 /*
   2  * netsniff-ng - the packet sniffing beast
   3  * Copyright 2009, 2010 Daniel Borkmann.
   4  * Subject to the GPL, version 2.
   5  */
   6
   7 extern int set_sockopt_hwtimestamp(int sock, const char *dev);
   8
   9 #ifdef __WITH_HARDWARE_TIMESTAMPING
  10 #include <string.h>
  11 #include <sys/ioctl.h>
  12 #include <sys/types.h>
  13 #include <sys/socket.h>
  14 #include <linux/sockios.h>
  15 #include <linux/net_tstamp.h>
  16 #include <linux/net_tstamp.h>
  17 #include <linux/if_packet.h>
  18 #include <linux/if.h>
  19
  20 #include "xutils.h"
  21
  22 int set_sockopt_hwtimestamp(int sock, const char *dev)
  23 {
  24         int timesource, ret;
  25         struct hwtstamp_config hwconfig;
  26         struct ifreq ifr;
  27
  28         if (!strncmp("any", dev, strlen("any")))
  29                 return -1;
  30
  31         memset(&hwconfig, 0, sizeof(hwconfig));
  32         hwconfig.tx_type = HWTSTAMP_TX_OFF;
  33         hwconfig.rx_filter = HWTSTAMP_FILTER_ALL;
  34
  35         memset(&ifr, 0, sizeof(ifr));
  36         strlcpy(ifr.ifr_name, dev, sizeof(ifr.ifr_name));
  37         ifr.ifr_data = &hwconfig;
  38
  39         ret = ioctl(sock, SIOCSHWTSTAMP, &ifr);
  40         if (ret < 0)
  41                 return -1;
  42
  43         timesource = SOF_TIMESTAMPING_RAW_HARDWARE;
  44
  45         return setsockopt(sock, SOL_PACKET, PACKET_TIMESTAMP, &timesource,
  46                           sizeof(timesource));
  47 }
  48 #else
  49 int set_sockopt_hwtimestamp(int sock, const char *dev)
  50 {
  51         return -1;
  52 }
  53 #endif