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-rw-r--r--net/dccp/options.c87
1 files changed, 59 insertions, 28 deletions
diff --git a/net/dccp/options.c b/net/dccp/options.c
index 85a86bd61f4..7ecffdf8575 100644
--- a/net/dccp/options.c
+++ b/net/dccp/options.c
@@ -2,8 +2,9 @@
* net/dccp/options.c
*
* An implementation of the DCCP protocol
- * Aristeu Sergio Rozanski Filho <aris@cathedrallabs.org>
- * Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
+ * Copyright (c) 2005 Aristeu Sergio Rozanski Filho <aris@cathedrallabs.org>
+ * Copyright (c) 2005 Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
+ * 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
@@ -138,7 +139,7 @@ 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;
- dp->dccps_timestamp_time = jiffies;
+ do_gettimeofday(&dp->dccps_timestamp_time);
dccp_pr_debug("%sTIMESTAMP=%u, ackno=%llu\n",
debug_prefix, opt_recv->dccpor_timestamp,
@@ -146,36 +147,45 @@ int dccp_parse_options(struct sock *sk, struct sk_buff *skb)
DCCP_SKB_CB(skb)->dccpd_ack_seq);
break;
case DCCPO_TIMESTAMP_ECHO:
- if (len < 4 || len > 8)
+ if (len != 4 && len != 6 && len != 8)
goto out_invalid_option;
opt_recv->dccpor_timestamp_echo = ntohl(*(u32 *)value);
- dccp_pr_debug("%sTIMESTAMP_ECHO=%u, len=%d, ackno=%llu, "
- "diff=%u\n",
+ dccp_pr_debug("%sTIMESTAMP_ECHO=%u, len=%d, ackno=%llu, ",
debug_prefix,
opt_recv->dccpor_timestamp_echo,
len + 2,
(unsigned long long)
- DCCP_SKB_CB(skb)->dccpd_ack_seq,
- (tcp_time_stamp -
- opt_recv->dccpor_timestamp_echo));
-
- opt_recv->dccpor_elapsed_time =
- dccp_decode_value_var(value + 4,
- len - 4);
- dccp_pr_debug("%sTIMESTAMP_ECHO ELAPSED_TIME=%d\n",
+ 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);
+ }
break;
case DCCPO_ELAPSED_TIME:
- if (len > 4)
+ if (len != 2 && len != 4)
goto out_invalid_option;
if (pkt_type == DCCP_PKT_DATA)
continue;
- opt_recv->dccpor_elapsed_time =
- dccp_decode_value_var(value, len);
+
+ if (len == 2)
+ opt_recv->dccpor_elapsed_time =
+ ntohs(*(u16 *)value);
+ else
+ opt_recv->dccpor_elapsed_time =
+ ntohl(*(u32 *)value);
+
dccp_pr_debug("%sELAPSED_TIME=%d\n", debug_prefix,
opt_recv->dccpor_elapsed_time);
break;
@@ -309,8 +319,7 @@ void dccp_insert_option_elapsed_time(struct sock *sk,
const int len = 2 + elapsed_time_len;
unsigned char *to;
- /* If elapsed_time == 0... */
- if (elapsed_time_len == 2)
+ if (elapsed_time_len == 0)
return;
if (DCCP_SKB_CB(skb)->dccpd_opt_len + len > DCCP_MAX_OPT_LEN) {
@@ -325,7 +334,13 @@ void dccp_insert_option_elapsed_time(struct sock *sk,
*to++ = DCCPO_ELAPSED_TIME;
*to++ = len;
- dccp_encode_value_var(elapsed_time, to, elapsed_time_len);
+ if (elapsed_time_len == 2) {
+ const u16 var16 = htons((u16)elapsed_time);
+ memcpy(to, &var16, 2);
+ } else {
+ const u32 var32 = htonl(elapsed_time);
+ memcpy(to, &var32, 4);
+ }
dccp_pr_debug("%sELAPSED_TIME=%u, len=%d, seqno=%llu\n",
debug_prefix, elapsed_time,
@@ -344,7 +359,7 @@ 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 = jiffies_to_usecs(jiffies - ap->dccpap_time) / 10;
+ const u32 elapsed_time = now_delta(ap->dccpap_time) / 10;
unsigned char *to, *from;
if (elapsed_time != 0)
@@ -414,7 +429,15 @@ static void dccp_insert_option_ack_vector(struct sock *sk, struct sk_buff *skb)
static inline void dccp_insert_option_timestamp(struct sock *sk,
struct sk_buff *skb)
{
- const u32 now = htonl(tcp_time_stamp);
+ struct timeval tv;
+ u32 now;
+
+ do_gettimeofday(&tv);
+ now = (tv.tv_sec * USEC_PER_SEC + tv.tv_usec) / 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 */
+
+ now = htonl(now);
dccp_insert_option(sk, skb, DCCPO_TIMESTAMP, &now, sizeof(now));
}
@@ -427,8 +450,7 @@ static void dccp_insert_option_timestamp_echo(struct sock *sk,
"CLIENT TX opt: " : "server TX opt: ";
#endif
u32 tstamp_echo;
- const u32 elapsed_time = jiffies_to_usecs(jiffies -
- dp->dccps_timestamp_time) / 10;
+ const u32 elapsed_time = 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;
unsigned char *to;
@@ -448,7 +470,14 @@ static void dccp_insert_option_timestamp_echo(struct sock *sk,
tstamp_echo = htonl(dp->dccps_timestamp_echo);
memcpy(to, &tstamp_echo, 4);
to += 4;
- dccp_encode_value_var(elapsed_time, to, elapsed_time_len);
+
+ if (elapsed_time_len == 2) {
+ const u16 var16 = htons((u16)elapsed_time);
+ memcpy(to, &var16, 2);
+ } else if (elapsed_time_len == 4) {
+ const u32 var32 = htonl(elapsed_time);
+ memcpy(to, &var32, 4);
+ }
dccp_pr_debug("%sTIMESTAMP_ECHO=%u, len=%d, seqno=%llu\n",
debug_prefix, dp->dccps_timestamp_echo,
@@ -456,7 +485,8 @@ static void dccp_insert_option_timestamp_echo(struct sock *sk,
(unsigned long long) DCCP_SKB_CB(skb)->dccpd_seq);
dp->dccps_timestamp_echo = 0;
- dp->dccps_timestamp_time = 0;
+ dp->dccps_timestamp_time.tv_sec = 0;
+ dp->dccps_timestamp_time.tv_usec = 0;
}
void dccp_insert_options(struct sock *sk, struct sk_buff *skb)
@@ -514,7 +544,8 @@ struct dccp_ackpkts *dccp_ackpkts_alloc(const unsigned int len,
ap->dccpap_ack_seqno = DCCP_MAX_SEQNO + 1;
ap->dccpap_buf_nonce = ap->dccpap_buf_nonce = 0;
ap->dccpap_ack_ptr = 0;
- ap->dccpap_time = 0;
+ ap->dccpap_time.tv_sec = 0;
+ ap->dccpap_time.tv_usec = 0;
ap->dccpap_buf_vector_len = ap->dccpap_ack_vector_len = 0;
}
@@ -665,7 +696,7 @@ int dccp_ackpkts_add(struct dccp_ackpkts *ap, u64 ackno, u8 state)
}
ap->dccpap_buf_ackno = ackno;
- ap->dccpap_time = jiffies;
+ do_gettimeofday(&ap->dccpap_time);
out:
dccp_pr_debug("");
dccp_ackpkts_print(ap);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-28 12:05:48 +0000