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#ifndef _CCID_H
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#define _CCID_H
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/*
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* net/dccp/ccid.h
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*
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* An implementation of the DCCP protocol
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* Arnaldo Carvalho de Melo <acme@conectiva.com.br>
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*
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* CCID infrastructure
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <net/sock.h>
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#include <linux/compiler.h>
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#include <linux/dccp.h>
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#include <linux/list.h>
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#include <linux/module.h>
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#define CCID_MAX 255
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struct ccid {
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unsigned char ccid_id;
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const char *ccid_name;
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struct module *ccid_owner;
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int (*ccid_init)(struct sock *sk);
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void (*ccid_exit)(struct sock *sk);
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int (*ccid_hc_rx_init)(struct sock *sk);
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int (*ccid_hc_tx_init)(struct sock *sk);
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void (*ccid_hc_rx_exit)(struct sock *sk);
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void (*ccid_hc_tx_exit)(struct sock *sk);
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void (*ccid_hc_rx_packet_recv)(struct sock *sk,
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struct sk_buff *skb);
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int (*ccid_hc_rx_parse_options)(struct sock *sk,
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unsigned char option,
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unsigned char len, u16 idx,
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unsigned char* value);
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void (*ccid_hc_rx_insert_options)(struct sock *sk,
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struct sk_buff *skb);
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void (*ccid_hc_tx_insert_options)(struct sock *sk,
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struct sk_buff *skb);
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void (*ccid_hc_tx_packet_recv)(struct sock *sk,
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struct sk_buff *skb);
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int (*ccid_hc_tx_parse_options)(struct sock *sk,
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unsigned char option,
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unsigned char len, u16 idx,
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unsigned char* value);
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int (*ccid_hc_tx_send_packet)(struct sock *sk,
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struct sk_buff *skb, int len);
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void (*ccid_hc_tx_packet_sent)(struct sock *sk, int more,
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int len);
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[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>
20 years ago
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void (*ccid_hc_rx_get_info)(struct sock *sk,
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struct tcp_info *info);
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void (*ccid_hc_tx_get_info)(struct sock *sk,
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struct tcp_info *info);
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int (*ccid_hc_rx_getsockopt)(struct sock *sk,
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const int optname, int len,
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u32 __user *optval,
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int __user *optlen);
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int (*ccid_hc_tx_getsockopt)(struct sock *sk,
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const int optname, int len,
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u32 __user *optval,
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int __user *optlen);
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};
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extern int ccid_register(struct ccid *ccid);
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extern int ccid_unregister(struct ccid *ccid);
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extern struct ccid *ccid_init(unsigned char id, struct sock *sk);
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extern void ccid_exit(struct ccid *ccid, struct sock *sk);
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static inline void __ccid_get(struct ccid *ccid)
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{
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__module_get(ccid->ccid_owner);
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}
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static inline int ccid_hc_tx_send_packet(struct ccid *ccid, struct sock *sk,
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struct sk_buff *skb, int len)
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{
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int rc = 0;
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if (ccid->ccid_hc_tx_send_packet != NULL)
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rc = ccid->ccid_hc_tx_send_packet(sk, skb, len);
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return rc;
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}
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static inline void ccid_hc_tx_packet_sent(struct ccid *ccid, struct sock *sk,
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int more, int len)
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{
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if (ccid->ccid_hc_tx_packet_sent != NULL)
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ccid->ccid_hc_tx_packet_sent(sk, more, len);
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}
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static inline int ccid_hc_rx_init(struct ccid *ccid, struct sock *sk)
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{
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int rc = 0;
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if (ccid->ccid_hc_rx_init != NULL)
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rc = ccid->ccid_hc_rx_init(sk);
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return rc;
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}
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static inline int ccid_hc_tx_init(struct ccid *ccid, struct sock *sk)
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{
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int rc = 0;
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if (ccid->ccid_hc_tx_init != NULL)
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rc = ccid->ccid_hc_tx_init(sk);
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return rc;
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}
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static inline void ccid_hc_rx_exit(struct ccid *ccid, struct sock *sk)
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{
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if (ccid->ccid_hc_rx_exit != NULL &&
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dccp_sk(sk)->dccps_hc_rx_ccid_private != NULL)
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ccid->ccid_hc_rx_exit(sk);
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}
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static inline void ccid_hc_tx_exit(struct ccid *ccid, struct sock *sk)
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{
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if (ccid->ccid_hc_tx_exit != NULL &&
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dccp_sk(sk)->dccps_hc_tx_ccid_private != NULL)
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ccid->ccid_hc_tx_exit(sk);
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}
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static inline void ccid_hc_rx_packet_recv(struct ccid *ccid, struct sock *sk,
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struct sk_buff *skb)
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{
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if (ccid->ccid_hc_rx_packet_recv != NULL)
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ccid->ccid_hc_rx_packet_recv(sk, skb);
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}
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static inline void ccid_hc_tx_packet_recv(struct ccid *ccid, struct sock *sk,
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struct sk_buff *skb)
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{
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if (ccid->ccid_hc_tx_packet_recv != NULL)
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ccid->ccid_hc_tx_packet_recv(sk, skb);
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}
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static inline int ccid_hc_tx_parse_options(struct ccid *ccid, struct sock *sk,
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unsigned char option,
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unsigned char len, u16 idx,
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unsigned char* value)
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{
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int rc = 0;
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if (ccid->ccid_hc_tx_parse_options != NULL)
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rc = ccid->ccid_hc_tx_parse_options(sk, option, len, idx,
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value);
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return rc;
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}
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static inline int ccid_hc_rx_parse_options(struct ccid *ccid, struct sock *sk,
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unsigned char option,
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unsigned char len, u16 idx,
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unsigned char* value)
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{
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int rc = 0;
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if (ccid->ccid_hc_rx_parse_options != NULL)
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rc = ccid->ccid_hc_rx_parse_options(sk, option, len, idx, value);
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return rc;
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}
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static inline void ccid_hc_tx_insert_options(struct ccid *ccid, struct sock *sk,
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struct sk_buff *skb)
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{
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if (ccid->ccid_hc_tx_insert_options != NULL)
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ccid->ccid_hc_tx_insert_options(sk, skb);
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}
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static inline void ccid_hc_rx_insert_options(struct ccid *ccid, struct sock *sk,
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struct sk_buff *skb)
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{
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if (ccid->ccid_hc_rx_insert_options != NULL)
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ccid->ccid_hc_rx_insert_options(sk, skb);
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}
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[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>
20 years ago
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static inline void ccid_hc_rx_get_info(struct ccid *ccid, struct sock *sk,
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struct tcp_info *info)
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{
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if (ccid->ccid_hc_rx_get_info != NULL)
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ccid->ccid_hc_rx_get_info(sk, info);
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}
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static inline void ccid_hc_tx_get_info(struct ccid *ccid, struct sock *sk,
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struct tcp_info *info)
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{
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if (ccid->ccid_hc_tx_get_info != NULL)
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ccid->ccid_hc_tx_get_info(sk, info);
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}
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static inline int ccid_hc_rx_getsockopt(struct ccid *ccid, struct sock *sk,
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const int optname, int len,
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u32 __user *optval, int __user *optlen)
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{
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int rc = -ENOPROTOOPT;
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if (ccid->ccid_hc_rx_getsockopt != NULL)
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rc = ccid->ccid_hc_rx_getsockopt(sk, optname, len,
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optval, optlen);
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return rc;
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}
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static inline int ccid_hc_tx_getsockopt(struct ccid *ccid, struct sock *sk,
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const int optname, int len,
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u32 __user *optval, int __user *optlen)
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{
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int rc = -ENOPROTOOPT;
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if (ccid->ccid_hc_tx_getsockopt != NULL)
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rc = ccid->ccid_hc_tx_getsockopt(sk, optname, len,
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optval, optlen);
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return rc;
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}
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#endif /* _CCID_H */
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