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| 3611 static int
3612 create_ring(pcap_t *handle, int *status)
...
3787 /*
3788 * PACKET_TIMESTAMP was added after linux/net_tstamp.h was,
3789 * so we check for PACKET_TIMESTAMP. We check for
3790 * linux/net_tstamp.h just in case a system somehow has
3791 * PACKET_TIMESTAMP but not linux/net_tstamp.h; that might
3792 * be unnecessary.
3793 *
3794 * SIOCSHWTSTAMP was introduced in the patch that introduced
3795 * linux/net_tstamp.h, so we don't bother checking whether
3796 * SIOCSHWTSTAMP is defined (if your Linux system has
3797 * linux/net_tstamp.h but doesn't define SIOCSHWTSTAMP, your
3798 * Linux system is badly broken).
3799 */
3800 #if defined(HAVE_LINUX_NET_TSTAMP_H) && defined(PACKET_TIMESTAMP)
3801 /*
3802 * If we were told to do so, ask the kernel and the driver
3803 * to use hardware timestamps.
3804 *
3805 * Hardware timestamps are only supported with mmapped
3806 * captures.
3807 */
3808 if (handle->opt.tstamp_type == PCAP_TSTAMP_ADAPTER ||
3809 handle->opt.tstamp_type == PCAP_TSTAMP_ADAPTER_UNSYNCED) {
3810 struct hwtstamp_config hwconfig;
3811 struct ifreq ifr;
3812 int timesource;
3813
3814 /*
3815 * Ask for hardware time stamps on all packets,
3816 * including transmitted packets.
3817 */
3818 memset(&hwconfig, 0, sizeof(hwconfig));
3819 hwconfig.tx_type = HWTSTAMP_TX_ON;
3820 hwconfig.rx_filter = HWTSTAMP_FILTER_ALL;
3821
3822 memset(&ifr, 0, sizeof(ifr));
3823 strlcpy(ifr.ifr_name, handle->opt.source, sizeof(ifr.ifr_name));
3824 ifr.ifr_data = (void *)&hwconfig;
3825
3826 if (ioctl(handle->fd, SIOCSHWTSTAMP, &ifr) < 0) {
3827 switch (errno) {
3828
3829 case EPERM:
3830 /*
3831 * Treat this as an error, as the
3832 * user should try to run this
3833 * with the appropriate privileges -
3834 * and, if they can't, shouldn't
3835 * try requesting hardware time stamps.
3836 */
3837 *status = PCAP_ERROR_PERM_DENIED;
3838 return -1;
3839
3840 case EOPNOTSUPP:
3841 /*
3842 * Treat this as a warning, as the
3843 * only way to fix the warning is to
3844 * get an adapter that supports hardware
3845 * time stamps. We'll just fall back
3846 * on the standard host time stamps.
3847 */
3848 *status = PCAP_WARNING_TSTAMP_TYPE_NOTSUP;
3849 break;
3850
3851 default:
3852 snprintf(handle->errbuf, PCAP_ERRBUF_SIZE,
3853 "SIOCSHWTSTAMP failed: %s",
3854 pcap_strerror(errno));
3855 *status = PCAP_ERROR;
3856 return -1;
3857 }
3858 } else {
3859 /*
3860 * Well, that worked. Now specify the type of
3861 * hardware time stamp we want for this
3862 * socket.
3863 */
3864 if (handle->opt.tstamp_type == PCAP_TSTAMP_ADAPTER) {
3865 /*
3866 * Hardware timestamp, synchronized
3867 * with the system clock.
3868 */
3869 timesource = SOF_TIMESTAMPING_SYS_HARDWARE;
3870 } else {
3871 /*
3872 * PCAP_TSTAMP_ADAPTER_UNSYNCED - hardware
3873 * timestamp, not synchronized with the
3874 * system clock.
3875 */
3876 timesource = SOF_TIMESTAMPING_RAW_HARDWARE;
3877 }
3878 if (setsockopt(handle->fd, SOL_PACKET, PACKET_TIMESTAMP, <=======
3879 (void *)×ource, sizeof(timesource))) {
3880 snprintf(handle->errbuf, PCAP_ERRBUF_SIZE,
3881 "can't set PACKET_TIMESTAMP: %s",
3882 pcap_strerror(errno));
3883 *status = PCAP_ERROR;
3884 return -1;
3885 }
3886 }
3887 }
3888 #endif /* HAVE_LINUX_NET_TSTAMP_H && PACKET_TIMESTAMP */
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