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[DCCP] Introduce dccp_timestamp

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To start the timestamps with 0.0ms, easing the integer maths in the CCIDs, this
probably will be reworked to use the to be introduced struct timeval_offset
infrastructure out of skb_get_timestamp, etc.

Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
This commit is contained in:
Arnaldo Carvalho de Melo
2005-09-09 02:38:35 -03:00
parent 954ee31f36
commit b0e567806d
9 changed files with 61 additions and 39 deletions
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45
net/dccp/options.c
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@@ -140,7 +140,7 @@ int dccp_parse_options(struct sock *sk, struct sk_buff *skb)
opt_recv->dccpor_timestamp = ntohl(*(u32 *)value);
dp->dccps_timestamp_echo = opt_recv->dccpor_timestamp;
do_gettimeofday(&dp->dccps_timestamp_time);
dccp_timestamp(sk, &dp->dccps_timestamp_time);
dccp_pr_debug("%sTIMESTAMP=%u, ackno=%llu\n",
debug_prefix, opt_recv->dccpor_timestamp,
@@ -361,9 +361,13 @@ static void dccp_insert_option_ack_vector(struct sock *sk, struct sk_buff *skb)
#endif
struct dccp_ackpkts *ap = dp->dccps_hc_rx_ackpkts;
int len = ap->dccpap_buf_vector_len + 2;
const u32 elapsed_time = timeval_now_delta(&ap->dccpap_time) / 10;
struct timeval now;
u32 elapsed_time;
unsigned char *to, *from;
dccp_timestamp(sk, &now);
elapsed_time = timeval_delta(&now, &ap->dccpap_time) / 10;
if (elapsed_time != 0)
dccp_insert_option_elapsed_time(sk, skb, elapsed_time);
@@ -428,13 +432,29 @@ static void dccp_insert_option_ack_vector(struct sock *sk, struct sk_buff *skb)
(unsigned long long) ap->dccpap_ack_ackno);
}
void dccp_timestamp(const struct sock *sk, struct timeval *tv)
{
const struct dccp_sock *dp = dccp_sk(sk);
do_gettimeofday(tv);
tv->tv_sec -= dp->dccps_epoch.tv_sec;
tv->tv_usec -= dp->dccps_epoch.tv_usec;
while (tv->tv_usec < 0) {
tv->tv_sec--;
tv->tv_usec += USEC_PER_SEC;
}
}
EXPORT_SYMBOL_GPL(dccp_timestamp);
void dccp_insert_option_timestamp(struct sock *sk, struct sk_buff *skb)
{
struct timeval tv;
u32 now;
do_gettimeofday(&tv);
now = (tv.tv_sec * USEC_PER_SEC + tv.tv_usec) / 10;
dccp_timestamp(sk, &tv);
now = timeval_usecs(&tv) / 10;
/* yes this will overflow but that is the point as we want a
* 10 usec 32 bit timer which mean it wraps every 11.9 hours */
@@ -452,13 +472,17 @@ static void dccp_insert_option_timestamp_echo(struct sock *sk,
const char *debug_prefix = dp->dccps_role == DCCP_ROLE_CLIENT ?
"CLIENT TX opt: " : "server TX opt: ";
#endif
struct timeval now;
u32 tstamp_echo;
const u32 elapsed_time =
timeval_now_delta(&dp->dccps_timestamp_time) / 10;
const int elapsed_time_len = dccp_elapsed_time_len(elapsed_time);
const int len = 6 + elapsed_time_len;
u32 elapsed_time;
int len, elapsed_time_len;
unsigned char *to;
dccp_timestamp(sk, &now);
elapsed_time = timeval_delta(&now, &dp->dccps_timestamp_time) / 10;
elapsed_time_len = dccp_elapsed_time_len(elapsed_time);
len = 6 + elapsed_time_len;
if (DCCP_SKB_CB(skb)->dccpd_opt_len + len > DCCP_MAX_OPT_LEN) {
LIMIT_NETDEBUG(KERN_INFO "DCCP: packet too small to insert "
"timestamp echo!\n");
@@ -623,7 +647,8 @@ static inline int dccp_ackpkts_set_buf_head_state(struct dccp_ackpkts *ap,
/*
* Implements the draft-ietf-dccp-spec-11.txt Appendix A
*/
int dccp_ackpkts_add(struct dccp_ackpkts *ap, u64 ackno, u8 state)
int dccp_ackpkts_add(struct dccp_ackpkts *ap, const struct sock *sk,
u64 ackno, u8 state)
{
/*
* Check at the right places if the buffer is full, if it is, tell the
@@ -704,7 +729,7 @@ int dccp_ackpkts_add(struct dccp_ackpkts *ap, u64 ackno, u8 state)
}
ap->dccpap_buf_ackno = ackno;
do_gettimeofday(&ap->dccpap_time);
dccp_timestamp(sk, &ap->dccpap_time);
out:
dccp_pr_debug("");
dccp_ackpkts_print(ap);