diff options
author | Arnaldo Carvalho de Melo <acme@mandriva.com> | 2005-09-09 05:38:35 (GMT) |
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committer | Arnaldo Carvalho de Melo <acme@mandriva.com> | 2005-09-09 05:38:35 (GMT) |
commit | b0e567806d16586629468c824dfb2e71155df7da (patch) | |
tree | 70f5905fae3270985fed1050335c56598fd32646 /net/dccp/options.c | |
parent | 954ee31f366fabe53fb450482789258fe552f40b (diff) | |
download | linux-b0e567806d16586629468c824dfb2e71155df7da.tar.xz |
[DCCP] Introduce dccp_timestamp
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>
Diffstat (limited to 'net/dccp/options.c')
-rw-r--r-- | net/dccp/options.c | 45 |
1 files changed, 35 insertions, 10 deletions
diff --git a/net/dccp/options.c b/net/dccp/options.c index 34b230a..d4c4242 100644 --- a/net/dccp/options.c +++ b/net/dccp/options.c @@ -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); |