[DCCP]: Fix the timestamp options

This changes timestamp, timestamp echo, and elapsed time to use units of 10
usecs as per DCCP spec. This has been tested to verify that times are correct.
Also fixed up length and used hton/ntoh more.

Still to add in later patches:
- actually use elapsed time to adjust RTT
(commented out as was prior to this patch)
- send options at times more closely following the spec
(content is now correct)

Signed-off-by: Ian McDonald <iam4@cs.waikato.ac.nz>
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 17 insertions, 2 deletions

diff --git a/net/dccp/dccp.h b/net/dccp/dccp.h
index 4efdce47000b..aab72b8d0703 100644
--- a/net/dccp/dccp.h
+++ b/net/dccp/dccp.h
@@ -4,7 +4,8 @@
  *  net/dccp/dccp.h
  *
  *  An implementation of the DCCP protocol
- *  Arnaldo Carvalho de Melo <acme@conectiva.com.br>
+ *  Copyright (c) 2005 Arnaldo Carvalho de Melo <acme@conectiva.com.br>
+ *  Copyright (c) 2005 Ian McDonald <iam4@cs.waikato.ac.nz>
  *
  *      This program is free software; you can redistribute it and/or modify it
  *      under the terms of the GNU General Public License version 2 as
@@ -404,6 +405,7 @@ extern struct socket *dccp_ctl_socket;
  * @dccpap_ack_nonce - the one-bit sum of the ECN Nonces for all State 0.
  *
  * @dccpap_buf_len - circular buffer length
+ * @dccpap_time         - the time in usecs
  * @dccpap_buf - circular buffer of acknowledgeable packets
  */
 struct dccp_ackpkts {
@@ -416,7 +418,7 @@ struct dccp_ackpkts {
         unsigned int            dccpap_buf_vector_len;
         unsigned int            dccpap_ack_vector_len;
         unsigned int            dccpap_buf_len;
-        unsigned long           dccpap_time;
+        struct timeval          dccpap_time;
         u8                      dccpap_buf_nonce;
         u8                      dccpap_ack_nonce;
         u8                      dccpap_buf[0];
@@ -430,6 +432,19 @@ extern int dccp_ackpkts_add(struct dccp_ackpkts *ap, u64 ackno, u8 state);
 extern void dccp_ackpkts_check_rcv_ackno(struct dccp_ackpkts *ap,
                                          struct sock *sk, u64 ackno);
 
+/*
+ * Returns the difference in usecs between timeval
+ * passed in and current time
+ */
+static inline u32 now_delta(struct timeval tv)
+{
+        struct timeval now;
+        
+        do_gettimeofday(&now);
+        return (now.tv_sec  - tv.tv_sec) * USEC_PER_SEC +
+               (now.tv_usec - tv.tv_usec);
+}
+
 #ifdef CONFIG_IP_DCCP_DEBUG
 extern void dccp_ackvector_print(const u64 ackno,
                                  const unsigned char *vector, int len);