diff options
author | Andrea Bittau <a.bittau@cs.ucl.ac.uk> | 2006-11-24 10:02:42 -0500 |
---|---|---|
committer | David S. Miller <davem@sunset.davemloft.net> | 2006-12-03 00:30:32 -0500 |
commit | bdf13d208dee4ada6d2b422536a12b45d5831aa3 (patch) | |
tree | ce8c076cce9f8c1bb70d5d6c0f05da2767df3a3f /net/dccp/ackvec.h | |
parent | 0bd4ff1b1528a39b07aab6c744ac37e053740ad0 (diff) |
[DCCP] ackvec: infrastructure for sending more than one ackvec per packet
Commiter note:
This was split from Andrea's original patch, in the process I changed the type
of the ackvec index fields to u16 instead of to int and haven't folded
dccp_ackvec_parse with dccp_ackvec_check_rcv_ackno.
Next patch will actually do the insertion of more than one ackvec per packet,
using, initially, up to a max of 2 ackvecs as per Andrea's original patch, then
I'll work on support for larger ackvecs, be it using a sysctl or using
setsockopt.
Signed-off-by: Andrea Bittau <a.bittau@cs.ucl.ac.uk>
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Diffstat (limited to 'net/dccp/ackvec.h')
-rw-r--r-- | net/dccp/ackvec.h | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/net/dccp/ackvec.h b/net/dccp/ackvec.h index d6a58db5fb1..96504a3b16e 100644 --- a/net/dccp/ackvec.h +++ b/net/dccp/ackvec.h | |||
@@ -17,7 +17,9 @@ | |||
17 | #include <linux/types.h> | 17 | #include <linux/types.h> |
18 | 18 | ||
19 | /* Read about the ECN nonce to see why it is 253 */ | 19 | /* Read about the ECN nonce to see why it is 253 */ |
20 | #define DCCP_MAX_ACKVEC_LEN 253 | 20 | #define DCCP_MAX_ACKVEC_OPT_LEN 253 |
21 | /* We can spread an ack vector across multiple options */ | ||
22 | #define DCCP_MAX_ACKVEC_LEN (DCCP_MAX_ACKVEC_OPT_LEN * 2) | ||
21 | 23 | ||
22 | #define DCCP_ACKVEC_STATE_RECEIVED 0 | 24 | #define DCCP_ACKVEC_STATE_RECEIVED 0 |
23 | #define DCCP_ACKVEC_STATE_ECN_MARKED (1 << 6) | 25 | #define DCCP_ACKVEC_STATE_ECN_MARKED (1 << 6) |
@@ -51,8 +53,8 @@ struct dccp_ackvec { | |||
51 | u64 dccpav_buf_ackno; | 53 | u64 dccpav_buf_ackno; |
52 | struct list_head dccpav_records; | 54 | struct list_head dccpav_records; |
53 | struct timeval dccpav_time; | 55 | struct timeval dccpav_time; |
54 | u8 dccpav_buf_head; | 56 | u16 dccpav_buf_head; |
55 | u8 dccpav_vec_len; | 57 | u16 dccpav_vec_len; |
56 | u8 dccpav_buf_nonce; | 58 | u8 dccpav_buf_nonce; |
57 | u8 dccpav_ack_nonce; | 59 | u8 dccpav_ack_nonce; |
58 | u8 dccpav_buf[DCCP_MAX_ACKVEC_LEN]; | 60 | u8 dccpav_buf[DCCP_MAX_ACKVEC_LEN]; |
@@ -75,9 +77,9 @@ struct dccp_ackvec_record { | |||
75 | struct list_head dccpavr_node; | 77 | struct list_head dccpavr_node; |
76 | u64 dccpavr_ack_seqno; | 78 | u64 dccpavr_ack_seqno; |
77 | u64 dccpavr_ack_ackno; | 79 | u64 dccpavr_ack_ackno; |
78 | u8 dccpavr_ack_ptr; | 80 | u16 dccpavr_ack_ptr; |
81 | u16 dccpavr_sent_len; | ||
79 | u8 dccpavr_ack_nonce; | 82 | u8 dccpavr_ack_nonce; |
80 | u8 dccpavr_sent_len; | ||
81 | }; | 83 | }; |
82 | 84 | ||
83 | struct sock; | 85 | struct sock; |
@@ -96,7 +98,8 @@ extern int dccp_ackvec_add(struct dccp_ackvec *av, const struct sock *sk, | |||
96 | extern void dccp_ackvec_check_rcv_ackno(struct dccp_ackvec *av, | 98 | extern void dccp_ackvec_check_rcv_ackno(struct dccp_ackvec *av, |
97 | struct sock *sk, const u64 ackno); | 99 | struct sock *sk, const u64 ackno); |
98 | extern int dccp_ackvec_parse(struct sock *sk, const struct sk_buff *skb, | 100 | extern int dccp_ackvec_parse(struct sock *sk, const struct sk_buff *skb, |
99 | const u8 opt, const u8 *value, const u8 len); | 101 | u64 *ackno, const u8 opt, |
102 | const u8 *value, const u8 len); | ||
100 | 103 | ||
101 | extern int dccp_insert_option_ackvec(struct sock *sk, struct sk_buff *skb); | 104 | extern int dccp_insert_option_ackvec(struct sock *sk, struct sk_buff *skb); |
102 | 105 | ||
@@ -135,7 +138,8 @@ static inline void dccp_ackvec_check_rcv_ackno(struct dccp_ackvec *av, | |||
135 | } | 138 | } |
136 | 139 | ||
137 | static inline int dccp_ackvec_parse(struct sock *sk, const struct sk_buff *skb, | 140 | static inline int dccp_ackvec_parse(struct sock *sk, const struct sk_buff *skb, |
138 | const u8 opt, const u8 *value, const u8 len) | 141 | const u64 *ackno, const u8 opt, |
142 | const u8 *value, const u8 len) | ||
139 | { | 143 | { |
140 | return -1; | 144 | return -1; |
141 | } | 145 | } |