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authorAndrea Bittau <a.bittau@cs.ucl.ac.uk>2006-11-24 13:02:42 -0200
committerDavid S. Miller <davem@sunset.davemloft.net>2006-12-02 21:30:32 -0800
commitbdf13d208dee4ada6d2b422536a12b45d5831aa3 (patch)
treece8c076cce9f8c1bb70d5d6c0f05da2767df3a3f /net/dccp/ackvec.c
parent0bd4ff1b1528a39b07aab6c744ac37e053740ad0 (diff)
downloadlinux-bdf13d208dee4ada6d2b422536a12b45d5831aa3.tar.bz2
[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.c')
-rw-r--r--net/dccp/ackvec.c23
1 files changed, 11 insertions, 12 deletions
diff --git a/net/dccp/ackvec.c b/net/dccp/ackvec.c
index 215355d993de..41d34d1babc1 100644
--- a/net/dccp/ackvec.c
+++ b/net/dccp/ackvec.c
@@ -169,13 +169,13 @@ void dccp_ackvec_free(struct dccp_ackvec *av)
}
static inline u8 dccp_ackvec_state(const struct dccp_ackvec *av,
- const u8 index)
+ const u32 index)
{
return av->dccpav_buf[index] & DCCP_ACKVEC_STATE_MASK;
}
static inline u8 dccp_ackvec_len(const struct dccp_ackvec *av,
- const u8 index)
+ const u32 index)
{
return av->dccpav_buf[index] & DCCP_ACKVEC_LEN_MASK;
}
@@ -275,7 +275,7 @@ int dccp_ackvec_add(struct dccp_ackvec *av, const struct sock *sk,
* could reduce the complexity of this scan.)
*/
u64 delta = dccp_delta_seqno(ackno, av->dccpav_buf_ackno);
- u8 index = av->dccpav_buf_head;
+ u32 index = av->dccpav_buf_head;
while (1) {
const u8 len = dccp_ackvec_len(av, index);
@@ -385,7 +385,7 @@ void dccp_ackvec_check_rcv_ackno(struct dccp_ackvec *av, struct sock *sk,
}
static void dccp_ackvec_check_rcv_ackvector(struct dccp_ackvec *av,
- struct sock *sk, u64 ackno,
+ struct sock *sk, u64 *ackno,
const unsigned char len,
const unsigned char *vector)
{
@@ -408,7 +408,7 @@ static void dccp_ackvec_check_rcv_ackvector(struct dccp_ackvec *av,
const u8 rl = *vector & DCCP_ACKVEC_LEN_MASK;
u64 ackno_end_rl;
- dccp_set_seqno(&ackno_end_rl, ackno - rl);
+ dccp_set_seqno(&ackno_end_rl, *ackno - rl);
/*
* If our AVR sequence number is greater than the ack, go
@@ -416,13 +416,13 @@ static void dccp_ackvec_check_rcv_ackvector(struct dccp_ackvec *av,
*/
list_for_each_entry_from(avr, &av->dccpav_records,
dccpavr_node) {
- if (!after48(avr->dccpavr_ack_seqno, ackno))
+ if (!after48(avr->dccpavr_ack_seqno, *ackno))
goto found;
}
/* End of the dccpav_records list, not found, exit */
break;
found:
- if (between48(avr->dccpavr_ack_seqno, ackno_end_rl, ackno)) {
+ if (between48(avr->dccpavr_ack_seqno, ackno_end_rl, *ackno)) {
const u8 state = *vector & DCCP_ACKVEC_STATE_MASK;
if (state != DCCP_ACKVEC_STATE_NOT_RECEIVED) {
dccp_pr_debug("%s ACK vector 0, len=%d, "
@@ -442,21 +442,20 @@ found:
*/
}
- dccp_set_seqno(&ackno, ackno_end_rl - 1);
+ dccp_set_seqno(ackno, ackno_end_rl - 1);
++vector;
}
}
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)
{
- if (len > DCCP_MAX_ACKVEC_LEN)
+ if (len > DCCP_MAX_ACKVEC_OPT_LEN)
return -1;
/* dccp_ackvector_print(DCCP_SKB_CB(skb)->dccpd_ack_seq, value, len); */
dccp_ackvec_check_rcv_ackvector(dccp_sk(sk)->dccps_hc_rx_ackvec, sk,
- DCCP_SKB_CB(skb)->dccpd_ack_seq,
- len, value);
+ ackno, len, value);
return 0;
}