ring: break out timestamping since not directly related

Break out the timestamping part of the ring.h file, since it's not
directly related to the {t,r}x_ring. Also inlining doesn't make
sense here.

Signed-off-by: Daniel Borkmann <dborkman@redhat.com>

1 files changed, 53 insertions, 0 deletions

diff --git a/tstamping.c b/tstamping.c
new file mode 100644
index 0000000..4de455d
--- /dev/null
+++ b/tstamping.c
@@ -0,0 +1,53 @@
+/*
+ * netsniff-ng - the packet sniffing beast
+ * Copyright 2009, 2010 Daniel Borkmann.
+ * Subject to the GPL, version 2.
+ */
+
+extern int set_sockopt_hwtimestamp(int sock, const char *dev);
+
+#ifdef __WITH_HARDWARE_TIMESTAMPING
+#include <string.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <linux/sockios.h>
+#include <linux/net_tstamp.h>
+#include <linux/net_tstamp.h>
+#include <linux/if_packet.h>
+#include <linux/if.h>
+
+#include "xutils.h"
+
+int set_sockopt_hwtimestamp(int sock, const char *dev)
+{
+	int timesource, ret;
+	struct hwtstamp_config hwconfig;
+	struct ifreq ifr;
+
+	if (!strncmp("any", dev, strlen("any")))
+		return -1;
+
+	memset(&hwconfig, 0, sizeof(hwconfig));
+	hwconfig.tx_type = HWTSTAMP_TX_OFF;
+	hwconfig.rx_filter = HWTSTAMP_FILTER_ALL;
+
+	memset(&ifr, 0, sizeof(ifr));
+	strlcpy(ifr.ifr_name, dev, sizeof(ifr.ifr_name));
+	ifr.ifr_data = &hwconfig;
+
+	ret = ioctl(sock, SIOCSHWTSTAMP, &ifr);
+	if (ret < 0)
+		return -1;
+
+	timesource = SOF_TIMESTAMPING_RAW_HARDWARE;
+
+	return setsockopt(sock, SOL_PACKET, PACKET_TIMESTAMP, &timesource,
+			  sizeof(timesource));
+}
+#else
+int set_sockopt_hwtimestamp(int sock, const char *dev)
+{
+	return -1;
+}
+#endif