From bdf13d208dee4ada6d2b422536a12b45d5831aa3 Mon Sep 17 00:00:00 2001 From: Andrea Bittau Date: Fri, 24 Nov 2006 13:02:42 -0200 Subject: [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 Signed-off-by: Arnaldo Carvalho de Melo --- net/dccp/ackvec.h | 18 +++++++++++------- 1 file changed, 11 insertions(+), 7 deletions(-) (limited to 'net/dccp/ackvec.h') diff --git a/net/dccp/ackvec.h b/net/dccp/ackvec.h index d6a58db..96504a3 100644 --- a/net/dccp/ackvec.h +++ b/net/dccp/ackvec.h @@ -17,7 +17,9 @@ #include /* Read about the ECN nonce to see why it is 253 */ -#define DCCP_MAX_ACKVEC_LEN 253 +#define DCCP_MAX_ACKVEC_OPT_LEN 253 +/* We can spread an ack vector across multiple options */ +#define DCCP_MAX_ACKVEC_LEN (DCCP_MAX_ACKVEC_OPT_LEN * 2) #define DCCP_ACKVEC_STATE_RECEIVED 0 #define DCCP_ACKVEC_STATE_ECN_MARKED (1 << 6) @@ -51,8 +53,8 @@ struct dccp_ackvec { u64 dccpav_buf_ackno; struct list_head dccpav_records; struct timeval dccpav_time; - u8 dccpav_buf_head; - u8 dccpav_vec_len; + u16 dccpav_buf_head; + u16 dccpav_vec_len; u8 dccpav_buf_nonce; u8 dccpav_ack_nonce; u8 dccpav_buf[DCCP_MAX_ACKVEC_LEN]; @@ -75,9 +77,9 @@ struct dccp_ackvec_record { struct list_head dccpavr_node; u64 dccpavr_ack_seqno; u64 dccpavr_ack_ackno; - u8 dccpavr_ack_ptr; + u16 dccpavr_ack_ptr; + u16 dccpavr_sent_len; u8 dccpavr_ack_nonce; - u8 dccpavr_sent_len; }; struct sock; @@ -96,7 +98,8 @@ extern int dccp_ackvec_add(struct dccp_ackvec *av, const struct sock *sk, extern void dccp_ackvec_check_rcv_ackno(struct dccp_ackvec *av, struct sock *sk, const u64 ackno); extern int dccp_ackvec_parse(struct sock *sk, const struct sk_buff *skb, - const u8 opt, const u8 *value, const u8 len); + u64 *ackno, const u8 opt, + const u8 *value, const u8 len); extern int dccp_insert_option_ackvec(struct sock *sk, struct sk_buff *skb); @@ -135,7 +138,8 @@ static inline void dccp_ackvec_check_rcv_ackno(struct dccp_ackvec *av, } static inline int dccp_ackvec_parse(struct sock *sk, const struct sk_buff *skb, - const u8 opt, const u8 *value, const u8 len) + const u64 *ackno, const u8 opt, + const u8 *value, const u8 len) { return -1; } -- cgit v1.1