#include <linux/dccp.h>
#include <linux/module.h>
#include <linux/types.h>
+#include <asm/unaligned.h>
#include <linux/kernel.h>
#include <linux/skbuff.h>
int sysctl_dccp_feat_send_ack_vector = DCCPF_INITIAL_SEND_ACK_VECTOR;
int sysctl_dccp_feat_send_ndp_count = DCCPF_INITIAL_SEND_NDP_COUNT;
-EXPORT_SYMBOL_GPL(sysctl_dccp_feat_sequence_window);
-
-void dccp_minisock_init(struct dccp_minisock *dmsk)
-{
- dmsk->dccpms_sequence_window = sysctl_dccp_feat_sequence_window;
- dmsk->dccpms_rx_ccid = sysctl_dccp_feat_rx_ccid;
- dmsk->dccpms_tx_ccid = sysctl_dccp_feat_tx_ccid;
- dmsk->dccpms_ack_ratio = sysctl_dccp_feat_ack_ratio;
- dmsk->dccpms_send_ack_vector = sysctl_dccp_feat_send_ack_vector;
- dmsk->dccpms_send_ndp_count = sysctl_dccp_feat_send_ndp_count;
-}
-
static u32 dccp_decode_value_var(const unsigned char *bf, const u8 len)
{
u32 value = 0;
unsigned char opt, len;
unsigned char *value;
u32 elapsed_time;
+ __be32 opt_val;
int rc;
int mandatory = 0;
if (len != 4)
goto out_invalid_option;
- opt_recv->dccpor_timestamp = ntohl(*(__be32 *)value);
+ opt_val = get_unaligned((__be32 *)value);
+ opt_recv->dccpor_timestamp = ntohl(opt_val);
dp->dccps_timestamp_echo = opt_recv->dccpor_timestamp;
- dccp_timestamp(sk, &dp->dccps_timestamp_time);
+ dp->dccps_timestamp_time = ktime_get_real();
dccp_pr_debug("%s rx opt: TIMESTAMP=%u, ackno=%llu\n",
dccp_role(sk), opt_recv->dccpor_timestamp,
if (len != 4 && len != 6 && len != 8)
goto out_invalid_option;
- opt_recv->dccpor_timestamp_echo = ntohl(*(__be32 *)value);
+ opt_val = get_unaligned((__be32 *)value);
+ opt_recv->dccpor_timestamp_echo = ntohl(opt_val);
dccp_pr_debug("%s rx opt: TIMESTAMP_ECHO=%u, len=%d, "
- "ackno=%llu, ", dccp_role(sk),
+ "ackno=%llu", dccp_role(sk),
opt_recv->dccpor_timestamp_echo,
len + 2,
(unsigned long long)
DCCP_SKB_CB(skb)->dccpd_ack_seq);
+ value += 4;
- if (len == 4)
+ if (len == 4) { /* no elapsed time included */
+ dccp_pr_debug_cat("\n");
break;
+ }
+
+ if (len == 6) { /* 2-byte elapsed time */
+ __be16 opt_val2 = get_unaligned((__be16 *)value);
+ elapsed_time = ntohs(opt_val2);
+ } else { /* 4-byte elapsed time */
+ opt_val = get_unaligned((__be32 *)value);
+ elapsed_time = ntohl(opt_val);
+ }
- if (len == 6)
- elapsed_time = ntohs(*(__be16 *)(value + 4));
- else
- elapsed_time = ntohl(*(__be32 *)(value + 4));
+ dccp_pr_debug_cat(", ELAPSED_TIME=%u\n", elapsed_time);
/* Give precedence to the biggest ELAPSED_TIME */
if (elapsed_time > opt_recv->dccpor_elapsed_time)
if (pkt_type == DCCP_PKT_DATA)
continue;
- if (len == 2)
- elapsed_time = ntohs(*(__be16 *)value);
- else
- elapsed_time = ntohl(*(__be32 *)value);
+ if (len == 2) {
+ __be16 opt_val2 = get_unaligned((__be16 *)value);
+ elapsed_time = ntohs(opt_val2);
+ } else {
+ opt_val = get_unaligned((__be32 *)value);
+ elapsed_time = ntohl(opt_val);
+ }
if (elapsed_time > opt_recv->dccpor_elapsed_time)
opt_recv->dccpor_elapsed_time = elapsed_time;
EXPORT_SYMBOL_GPL(dccp_insert_option_elapsed_time);
-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);
-
int dccp_insert_option_timestamp(struct sock *sk, struct sk_buff *skb)
{
- struct timeval tv;
- __be32 now;
-
- dccp_timestamp(sk, &tv);
- now = htonl(timeval_usecs(&tv) / 10);
+ __be32 now = htonl(dccp_timestamp());
/* 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 */
struct sk_buff *skb)
{
struct dccp_sock *dp = dccp_sk(sk);
- struct timeval now;
__be32 tstamp_echo;
- 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;
+ const suseconds_t delta = ktime_us_delta(ktime_get_real(),
+ dp->dccps_timestamp_time);
+ u32 elapsed_time = delta / 10;
elapsed_time_len = dccp_elapsed_time_len(elapsed_time);
len = 6 + elapsed_time_len;
}
dp->dccps_timestamp_echo = 0;
- dp->dccps_timestamp_time.tv_sec = 0;
- dp->dccps_timestamp_time.tv_usec = 0;
+ dp->dccps_timestamp_time = ktime_set(0, 0);
return 0;
}
dccp_insert_options_feat(sk, skb))
return -1;
+ /*
+ * Obtain RTT sample from Request/Response exchange.
+ * This is currently used in CCID 3 initialisation.
+ */
+ if (DCCP_SKB_CB(skb)->dccpd_type == DCCP_PKT_REQUEST &&
+ dccp_insert_option_timestamp(sk, skb))
+ return -1;
+
/* XXX: insert other options when appropriate */
if (DCCP_SKB_CB(skb)->dccpd_opt_len != 0) {