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authorArnaldo Carvalho de Melo <acme@mandriva.com>2005-09-09 02:32:01 -0300
committerArnaldo Carvalho de Melo <acme@mandriva.com>2005-09-09 02:32:01 -0300
commit1c14ac0ae8eb62cbb40af1e31b156994c7d7d3d5 (patch)
treed58ab81e5a82d53e58596dda2dc6a9dab88fd0b4
parent27ae543e6f116df66e2b19ff0a3aa1053e4784d8 (diff)
[DCCP] Give precedence to the biggest ELAPSED_TIME
We can get this value in an TIMESTAMP_ECHO and/or in an ELAPSED_TIME option, if receiving both give precendence to the biggest one. In my tests they are very close if not equal at all times, so we may well think about removing the code in CCID3 that inserts this option and leaving this to the core, and perhaps even use just TIMESTAMP_ECHO including the elapsed time. Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
-rw-r--r--net/dccp/options.c34
1 files changed, 18 insertions, 16 deletions
diff --git a/net/dccp/options.c b/net/dccp/options.c
index 7ad2f4266ff..34b230a0087 100644
--- a/net/dccp/options.c
+++ b/net/dccp/options.c
@@ -72,6 +72,7 @@ int dccp_parse_options(struct sock *sk, struct sk_buff *skb)
struct dccp_options_received *opt_recv = &dp->dccps_options_received;
unsigned char opt, len;
unsigned char *value;
+ u32 elapsed_time;
memset(opt_recv, 0, sizeof(*opt_recv));
@@ -159,18 +160,18 @@ int dccp_parse_options(struct sock *sk, struct sk_buff *skb)
(unsigned long long)
DCCP_SKB_CB(skb)->dccpd_ack_seq);
- if (len > 4) {
- if (len == 6)
- opt_recv->dccpor_elapsed_time =
- ntohs(*(u16 *)(value + 4));
- else
- opt_recv->dccpor_elapsed_time =
- ntohl(*(u32 *)(value + 4));
- dccp_pr_debug("%sTIMESTAMP_ECHO ELAPSED_TIME=%d\n",
- debug_prefix,
- opt_recv->dccpor_elapsed_time);
- }
+ if (len == 4)
+ break;
+
+ if (len == 6)
+ elapsed_time = ntohs(*(u16 *)(value + 4));
+ else
+ elapsed_time = ntohl(*(u32 *)(value + 4));
+
+ /* Give precedence to the biggest ELAPSED_TIME */
+ if (elapsed_time > opt_recv->dccpor_elapsed_time)
+ opt_recv->dccpor_elapsed_time = elapsed_time;
break;
case DCCPO_ELAPSED_TIME:
if (len != 2 && len != 4)
@@ -180,14 +181,15 @@ int dccp_parse_options(struct sock *sk, struct sk_buff *skb)
continue;
if (len == 2)
- opt_recv->dccpor_elapsed_time =
- ntohs(*(u16 *)value);
+ elapsed_time = ntohs(*(u16 *)value);
else
- opt_recv->dccpor_elapsed_time =
- ntohl(*(u32 *)value);
+ elapsed_time = ntohl(*(u32 *)value);
+
+ if (elapsed_time > opt_recv->dccpor_elapsed_time)
+ opt_recv->dccpor_elapsed_time = elapsed_time;
dccp_pr_debug("%sELAPSED_TIME=%d\n", debug_prefix,
- opt_recv->dccpor_elapsed_time);
+ elapsed_time);
break;
/*
* From draft-ietf-dccp-spec-11.txt: