[DCCP]: Initial feature negotiation implementation
Still needs more work, but boots and doesn't crashes, even
does some negotiation!
18:38:52.174934 127.0.0.1.43458 > 127.0.0.1.5001: request <change_l ack_ratio 2, change_r ccid 2, change_l ccid 2>
18:38:52.218526 127.0.0.1.5001 > 127.0.0.1.43458: response <nop, nop, change_l ack_ratio 2, confirm_r ccid 2 2, confirm_l ccid 2 2, confirm_r ack_ratio 2>
18:38:52.185398 127.0.0.1.43458 > 127.0.0.1.5001: <nop, confirm_r ack_ratio 2, ack_vector0 0x00, elapsed_time 212>
:-)
Signed-off-by: Andrea Bittau <a.bittau@cs.ucl.ac.uk>
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-21 04:43:56 +03:00
# ifndef _DCCP_FEAT_H
# define _DCCP_FEAT_H
/*
* net / dccp / feat . h
*
* An implementation of the DCCP protocol
* Copyright ( c ) 2005 Andrea Bittau < a . bittau @ cs . ucl . ac . uk >
*
* This program is free software ; you can redistribute it and / or modify it
* under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation .
*/
# include <linux/types.h>
[DCCP]: Make feature negotiation more readable
This patch replaces cryptic feature negotiation messages of type
Oct 31 15:42:20 kernel: dccp_feat_change: feat change type=32 feat=1
Oct 31 15:42:21 kernel: dccp_feat_change: feat change type=34 feat=1
Oct 31 15:42:21 kernel: dccp_feat_change: feat change type=32 feat=5
into ones of type:
Nov 2 13:54:45 kernel: dccp_feat_change: ChangeL(CCID (1), 3)
Nov 2 13:54:45 kernel: dccp_feat_change: ChangeR(CCID (1), 3)
Nov 2 13:54:45 kernel: dccp_feat_change: ChangeL(Ack Ratio (5), 2)
Also,
* completed the feature number list wrt RFC 4340 sec. 6.4
* annotating which ones have been implemented so far
* implemented rudimentary sanity checking in feat.c (FIXMEs)
* some minor fixes
Commiter note: uninlined dccp_feat_name and dccp_feat_typename, for
consistency with dccp_{state,packet}_name, that, BTW,
should be compiled only if CONFIG_IP_DCCP_DEBUG is
selected, leaving this to another cset tho. Also
shortened dccp_feat_negotiation_debug to dccp_feat_debug.
Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
2006-11-14 17:48:10 +03:00
# include "dccp.h"
[DCCP]: Initial feature negotiation implementation
Still needs more work, but boots and doesn't crashes, even
does some negotiation!
18:38:52.174934 127.0.0.1.43458 > 127.0.0.1.5001: request <change_l ack_ratio 2, change_r ccid 2, change_l ccid 2>
18:38:52.218526 127.0.0.1.5001 > 127.0.0.1.43458: response <nop, nop, change_l ack_ratio 2, confirm_r ccid 2 2, confirm_l ccid 2 2, confirm_r ack_ratio 2>
18:38:52.185398 127.0.0.1.43458 > 127.0.0.1.5001: <nop, confirm_r ack_ratio 2, ack_vector0 0x00, elapsed_time 212>
:-)
Signed-off-by: Andrea Bittau <a.bittau@cs.ucl.ac.uk>
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-21 04:43:56 +03:00
2008-11-05 10:38:20 +03:00
enum dccp_feat_type {
FEAT_AT_RX = 1 , /* located at RX side of half-connection */
FEAT_AT_TX = 2 , /* located at TX side of half-connection */
FEAT_SP = 4 , /* server-priority reconciliation (6.3.1) */
FEAT_NN = 8 , /* non-negotiable reconciliation (6.3.2) */
FEAT_UNKNOWN = 0xFF /* not understood or invalid feature */
} ;
enum dccp_feat_state {
FEAT_DEFAULT = 0 , /* using default values from 6.4 */
FEAT_INITIALISING , /* feature is being initialised */
FEAT_CHANGING , /* Change sent but not confirmed yet */
FEAT_UNSTABLE , /* local modification in state CHANGING */
FEAT_STABLE /* both ends (think they) agree */
} ;
/**
* dccp_feat_val - Container for SP or NN feature values
* @ nn : single NN value
* @ sp . vec : single SP value plus optional preference list
* @ sp . len : length of @ sp . vec in bytes
*/
typedef union {
u64 nn ;
struct {
u8 * vec ;
u8 len ;
} sp ;
} dccp_feat_val ;
/**
* struct feat_entry - Data structure to perform feature negotiation
* @ val : feature ' s current value ( SP features may have preference list )
* @ state : feature ' s current state
* @ feat_num : one of % dccp_feature_numbers
* @ needs_mandatory : whether Mandatory options should be sent
* @ needs_confirm : whether to send a Confirm instead of a Change
* @ empty_confirm : whether to send an empty Confirm ( depends on @ needs_confirm )
* @ is_local : feature location ( 1 ) or feature - remote ( 0 )
* @ node : list pointers , entries arranged in FIFO order
*/
struct dccp_feat_entry {
dccp_feat_val val ;
enum dccp_feat_state state : 8 ;
u8 feat_num ;
bool needs_mandatory ,
needs_confirm ,
empty_confirm ,
is_local ;
struct list_head node ;
} ;
static inline u8 dccp_feat_genopt ( struct dccp_feat_entry * entry )
{
if ( entry - > needs_confirm )
return entry - > is_local ? DCCPO_CONFIRM_L : DCCPO_CONFIRM_R ;
return entry - > is_local ? DCCPO_CHANGE_L : DCCPO_CHANGE_R ;
}
[DCCP]: Make feature negotiation more readable
This patch replaces cryptic feature negotiation messages of type
Oct 31 15:42:20 kernel: dccp_feat_change: feat change type=32 feat=1
Oct 31 15:42:21 kernel: dccp_feat_change: feat change type=34 feat=1
Oct 31 15:42:21 kernel: dccp_feat_change: feat change type=32 feat=5
into ones of type:
Nov 2 13:54:45 kernel: dccp_feat_change: ChangeL(CCID (1), 3)
Nov 2 13:54:45 kernel: dccp_feat_change: ChangeR(CCID (1), 3)
Nov 2 13:54:45 kernel: dccp_feat_change: ChangeL(Ack Ratio (5), 2)
Also,
* completed the feature number list wrt RFC 4340 sec. 6.4
* annotating which ones have been implemented so far
* implemented rudimentary sanity checking in feat.c (FIXMEs)
* some minor fixes
Commiter note: uninlined dccp_feat_name and dccp_feat_typename, for
consistency with dccp_{state,packet}_name, that, BTW,
should be compiled only if CONFIG_IP_DCCP_DEBUG is
selected, leaving this to another cset tho. Also
shortened dccp_feat_negotiation_debug to dccp_feat_debug.
Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
2006-11-14 17:48:10 +03:00
# ifdef CONFIG_IP_DCCP_DEBUG
extern const char * dccp_feat_typename ( const u8 type ) ;
extern const char * dccp_feat_name ( const u8 feat ) ;
static inline void dccp_feat_debug ( const u8 type , const u8 feat , const u8 val )
{
dccp_pr_debug ( " %s(%s (%d), %d) \n " , dccp_feat_typename ( type ) ,
dccp_feat_name ( feat ) , feat , val ) ;
}
# else
# define dccp_feat_debug(type, feat, val)
# endif /* CONFIG_IP_DCCP_DEBUG */
[DCCP]: Initial feature negotiation implementation
Still needs more work, but boots and doesn't crashes, even
does some negotiation!
18:38:52.174934 127.0.0.1.43458 > 127.0.0.1.5001: request <change_l ack_ratio 2, change_r ccid 2, change_l ccid 2>
18:38:52.218526 127.0.0.1.5001 > 127.0.0.1.43458: response <nop, nop, change_l ack_ratio 2, confirm_r ccid 2 2, confirm_l ccid 2 2, confirm_r ack_ratio 2>
18:38:52.185398 127.0.0.1.43458 > 127.0.0.1.5001: <nop, confirm_r ack_ratio 2, ack_vector0 0x00, elapsed_time 212>
:-)
Signed-off-by: Andrea Bittau <a.bittau@cs.ucl.ac.uk>
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-21 04:43:56 +03:00
2006-03-21 09:51:53 +03:00
extern int dccp_feat_change ( struct dccp_minisock * dmsk , u8 type , u8 feature ,
[DCCP]: Initial feature negotiation implementation
Still needs more work, but boots and doesn't crashes, even
does some negotiation!
18:38:52.174934 127.0.0.1.43458 > 127.0.0.1.5001: request <change_l ack_ratio 2, change_r ccid 2, change_l ccid 2>
18:38:52.218526 127.0.0.1.5001 > 127.0.0.1.43458: response <nop, nop, change_l ack_ratio 2, confirm_r ccid 2 2, confirm_l ccid 2 2, confirm_r ack_ratio 2>
18:38:52.185398 127.0.0.1.43458 > 127.0.0.1.5001: <nop, confirm_r ack_ratio 2, ack_vector0 0x00, elapsed_time 212>
:-)
Signed-off-by: Andrea Bittau <a.bittau@cs.ucl.ac.uk>
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-21 04:43:56 +03:00
u8 * val , u8 len , gfp_t gfp ) ;
extern int dccp_feat_change_recv ( struct sock * sk , u8 type , u8 feature ,
u8 * val , u8 len ) ;
extern int dccp_feat_confirm_recv ( struct sock * sk , u8 type , u8 feature ,
u8 * val , u8 len ) ;
2006-03-21 09:51:53 +03:00
extern void dccp_feat_clean ( struct dccp_minisock * dmsk ) ;
[DCCP]: Initial feature negotiation implementation
Still needs more work, but boots and doesn't crashes, even
does some negotiation!
18:38:52.174934 127.0.0.1.43458 > 127.0.0.1.5001: request <change_l ack_ratio 2, change_r ccid 2, change_l ccid 2>
18:38:52.218526 127.0.0.1.5001 > 127.0.0.1.43458: response <nop, nop, change_l ack_ratio 2, confirm_r ccid 2 2, confirm_l ccid 2 2, confirm_r ack_ratio 2>
18:38:52.185398 127.0.0.1.43458 > 127.0.0.1.5001: <nop, confirm_r ack_ratio 2, ack_vector0 0x00, elapsed_time 212>
:-)
Signed-off-by: Andrea Bittau <a.bittau@cs.ucl.ac.uk>
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-21 04:43:56 +03:00
extern int dccp_feat_clone ( struct sock * oldsk , struct sock * newsk ) ;
2008-11-05 10:55:49 +03:00
extern int dccp_feat_clone_list ( struct list_head const * , struct list_head * ) ;
2006-03-21 09:51:53 +03:00
extern int dccp_feat_init ( struct dccp_minisock * dmsk ) ;
[DCCP]: Initial feature negotiation implementation
Still needs more work, but boots and doesn't crashes, even
does some negotiation!
18:38:52.174934 127.0.0.1.43458 > 127.0.0.1.5001: request <change_l ack_ratio 2, change_r ccid 2, change_l ccid 2>
18:38:52.218526 127.0.0.1.5001 > 127.0.0.1.43458: response <nop, nop, change_l ack_ratio 2, confirm_r ccid 2 2, confirm_l ccid 2 2, confirm_r ack_ratio 2>
18:38:52.185398 127.0.0.1.43458 > 127.0.0.1.5001: <nop, confirm_r ack_ratio 2, ack_vector0 0x00, elapsed_time 212>
:-)
Signed-off-by: Andrea Bittau <a.bittau@cs.ucl.ac.uk>
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-21 04:43:56 +03:00
# endif /* _DCCP_FEAT_H */