[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>

1 files changed, 2 insertions, 1 deletions

diff --git a/net/dccp/options.c b/net/dccp/options.c
index ee709ae0a97f..f398b43bc055 100644
--- a/net/dccp/options.c
+++ b/net/dccp/options.c
@@ -62,6 +62,7 @@ int dccp_parse_options(struct sock *sk, struct sk_buff *skb)
         struct dccp_sock *dp = dccp_sk(sk);
         const struct dccp_hdr *dh = dccp_hdr(skb);
         const u8 pkt_type = DCCP_SKB_CB(skb)->dccpd_type;
+        u64 ackno = DCCP_SKB_CB(skb)->dccpd_ack_seq;
         unsigned char *options = (unsigned char *)dh + dccp_hdr_len(skb);
         unsigned char *opt_ptr = options;
         const unsigned char *opt_end = (unsigned char *)dh +
@@ -149,7 +150,7 @@ int dccp_parse_options(struct sock *sk, struct sk_buff *skb)
                                 break;
 
                         if (dccp_msk(sk)->dccpms_send_ack_vector &&
-                            dccp_ackvec_parse(sk, skb, opt, value, len))
+                            dccp_ackvec_parse(sk, skb, &ackno, opt, value, len))
                                 goto out_invalid_option;
                         break;
                 case DCCPO_TIMESTAMP: