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authorArnaldo Carvalho de Melo <acme@mandriva.com>2005-08-23 21:52:35 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2005-08-29 16:05:07 -0700
commit2babe1f6fea717c36c008c878fe095d1ca5696c1 (patch)
treef2ce23b6e5898a6bec8726f17104074516559397 /net/dccp/ccid.h
parent[CCID3]: Calculate the RTT in the RX half connection (diff)
downloadlinux-dev-2babe1f6fea717c36c008c878fe095d1ca5696c1.tar.xz
linux-dev-2babe1f6fea717c36c008c878fe095d1ca5696c1.zip
[DCCP]: Introduce dccp_get_info
And also hc_tx and hc_rx get_info functions for the CCIDs to fill in information that is specific to them. For now reusing struct tcp_info, later I'll try to figure out a better solution, for now its really nice to get this kind of info: [root@qemu ~]# ./ss -danemi State Recv-Q Send-Q Local Addr:Port Peer Addr:Port LISTEN 0 0 *:5001 *:* ino:628 sk:c1340040 mem:(r0,w0,f0,t0) cwnd:0 ssthresh:0 ESTAB 0 0 172.20.0.2:5001 172.20.0.1:32785 ino:629 sk:c13409a0 mem:(r0,w0,f0,t0) ts rto:1000 rtt:0.004/0 cwnd:0 ssthresh:0 rcv_rtt:61.377 This, for instance, shows that we're not congestion controlling ACKs, as the above output is in the ttcp receiving host, and ttcp is a one way app, i.e. the received never calls sendmsg, so ccid_hc_tx_send_packet is never called, so the TX half connection stays in TFRC_SSTATE_NO_SENT state and hctx_rtt is never calculated, stays with the value set in ccid3_hc_tx_init, 4us, as show above in milliseconds (0.004ms), upcoming patches will fix this. rcv_rtt seems sane tho, matching ping results :-) Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/dccp/ccid.h')
-rw-r--r--net/dccp/ccid.h18
1 files changed, 18 insertions, 0 deletions
diff --git a/net/dccp/ccid.h b/net/dccp/ccid.h
index c6767b282244..962f1e9e2f7e 100644
--- a/net/dccp/ccid.h
+++ b/net/dccp/ccid.h
@@ -50,6 +50,10 @@ struct ccid {
struct sk_buff *skb, int len);
void (*ccid_hc_tx_packet_sent)(struct sock *sk, int more,
int len);
+ void (*ccid_hc_rx_get_info)(struct sock *sk,
+ struct tcp_info *info);
+ void (*ccid_hc_tx_get_info)(struct sock *sk,
+ struct tcp_info *info);
};
extern int ccid_register(struct ccid *ccid);
@@ -159,4 +163,18 @@ static inline void ccid_hc_rx_insert_options(struct ccid *ccid, struct sock *sk,
if (ccid->ccid_hc_rx_insert_options != NULL)
ccid->ccid_hc_rx_insert_options(sk, skb);
}
+
+static inline void ccid_hc_rx_get_info(struct ccid *ccid, struct sock *sk,
+ struct tcp_info *info)
+{
+ if (ccid->ccid_hc_rx_get_info != NULL)
+ ccid->ccid_hc_rx_get_info(sk, info);
+}
+
+static inline void ccid_hc_tx_get_info(struct ccid *ccid, struct sock *sk,
+ struct tcp_info *info)
+{
+ if (ccid->ccid_hc_tx_get_info != NULL)
+ ccid->ccid_hc_tx_get_info(sk, info);
+}
#endif /* _CCID_H */