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 #include "str.h"
  22
  23 int set_sockopt_hwtimestamp(int sock, const char *dev)
  24 {
  25         int timesource, ret;
  26         struct hwtstamp_config hwconfig;
  27         struct ifreq ifr;
  28
  29         if (!strncmp("any", dev, strlen("any")))
  30                 return -1;
  31
  32         memset(&hwconfig, 0, sizeof(hwconfig));
  33         hwconfig.tx_type = HWTSTAMP_TX_OFF;
  34         hwconfig.rx_filter = HWTSTAMP_FILTER_ALL;
  35
  36         memset(&ifr, 0, sizeof(ifr));
  37         strlcpy(ifr.ifr_name, dev, sizeof(ifr.ifr_name));
  38         ifr.ifr_data = &hwconfig;
  39
  40         ret = ioctl(sock, SIOCSHWTSTAMP, &ifr);
  41         if (ret < 0)
  42                 return -1;
  43
  44         timesource = SOF_TIMESTAMPING_RAW_HARDWARE;
  45
  46         return setsockopt(sock, SOL_PACKET, PACKET_TIMESTAMP, &timesource,
  47                           sizeof(timesource));
  48 }
  49 #else
  50 int set_sockopt_hwtimestamp(int sock, const char *dev)
  51 {
  52         return -1;
  53 }
  54 #endif