1 files changed, 36 insertions, 0 deletions
diff --git a/net/ntp.c b/net/ntp.c
new file mode 100644
index 0000000..137d677
--- /dev/null
+++ b/net/ntp.c
@@ -0,0 +1,36 @@
+#include "udp.h"
+#include "ntp.h"
+
+uint32_t ntp_generic(struct netdev *dev, uint32_t ip, uint16_t src, uint16_t dst, uint8_t* pos,uint8_t *end)
+{
+    pos-=48; // we need 48 bytes
+    struct udp_v4_ntp *ntp=pos;
+    
+    ntp->li_vn_mode=0x1b;      // Eight bits. li, vn, and mode.
+			    // li.   Two bits.   Leap indicator.
+			    // vn.   Three bits. Version number of the protocol.
+			    // mode. Three bits. Client will pick mode 3 for client.
+
+    ntp->stratum=0;         // Eight bits. Stratum level of the local clock.
+    ntp->poll=0;            // Eight bits. Maximum interval between successive messages.
+    ntp->precision=0;       // Eight bits. Precision of the local clock.
+
+    ntp->rootDelay=0;      // 32 bits. Total round trip delay time.
+    ntp->rootDispersion=0; // 32 bits. Max error aloud from primary clock source.
+    ntp->refId=0;          // 32 bits. Reference clock identifier.
+
+    ntp->refTm_s=0;        // 32 bits. Reference time-stamp seconds.
+    ntp->refTm_f=0;        // 32 bits. Reference time-stamp fraction of a second.
+
+    ntp->origTm_s=0;       // 32 bits. Originate time-stamp seconds.
+    ntp->origTm_f=0;       // 32 bits. Originate time-stamp fraction of a second.
+
+    ntp->rxTm_s=0;         // 32 bits. Received time-stamp seconds.
+    ntp->rxTm_f=0;         // 32 bits. Received time-stamp fraction of a second.
+
+    ntp->txTm_s=0;         // 32 bits and the most important field the client cares about. Transmit time-stamp seconds.
+    ntp->txTm_f=0;         // 32 bits. Transmit time-stamp fraction of a second.
+
+    return udp_generic(dev, ip, src, dst, pos,end);
+}
+