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[DCCP]: More precisely set reset_code when sending RESET packets 

Moving the setting of DCCP_SKB_CB(skb)->dccpd_reset_code to the places
where events happen that trigger sending a RESET packet.

Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arnaldo Carvalho de Melo 2005-09-16 16:58:33 -07:00 committed by David S. Miller
parent 37f7f421cc
commit 0c10c5d968
2 changed files with 18 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
net/dccp/input.c
View File

@ -384,9 +384,9 @@ static int dccp_rcv_request_sent_state_process(struct sock *sk,
}
out_invalid_packet:
return 1; /* dccp_v4_do_rcv will send a reset, but...
FIXME: the reset code should be
DCCP_RESET_CODE_PACKET_ERROR */
/* dccp_v4_do_rcv will send a reset */
DCCP_SKB_CB(skb)->dccpd_reset_code = DCCP_RESET_CODE_PACKET_ERROR;
return 1;
}
static int dccp_rcv_respond_partopen_state_process(struct sock *sk,
@ -433,6 +433,7 @@ int dccp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
struct dccp_hdr *dh, unsigned len)
{
struct dccp_sock *dp = dccp_sk(sk);
struct dccp_skb_cb *dcb = DCCP_SKB_CB(skb);
const int old_state = sk->sk_state;
int queued = 0;
@ -473,7 +474,8 @@ int dccp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
if (dh->dccph_type == DCCP_PKT_RESET)
goto discard;
/* Caller (dccp_v4_do_rcv) will send Reset(No Connection)*/
/* Caller (dccp_v4_do_rcv) will send Reset */
dcb->dccpd_reset_code = DCCP_RESET_CODE_NO_CONNECTION;
return 1;
}
@ -487,8 +489,7 @@ int dccp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
if (dccp_parse_options(sk, skb))
goto discard;
if (DCCP_SKB_CB(skb)->dccpd_ack_seq !=
DCCP_PKT_WITHOUT_ACK_SEQ)
if (dcb->dccpd_ack_seq != DCCP_PKT_WITHOUT_ACK_SEQ)
dccp_event_ack_recv(sk, skb);
ccid_hc_rx_packet_recv(dp->dccps_hc_rx_ccid, sk, skb);
@ -500,7 +501,7 @@ int dccp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
*/
if (dp->dccps_options.dccpo_send_ack_vector) {
if (dccp_ackpkts_add(dp->dccps_hc_rx_ackpkts, sk,
DCCP_SKB_CB(skb)->dccpd_seq,
dcb->dccpd_seq,
DCCP_ACKPKTS_STATE_RECEIVED))
goto discard;
/*
@ -551,8 +552,7 @@ int dccp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
dh->dccph_type == DCCP_PKT_REQUEST) ||
(sk->sk_state == DCCP_RESPOND &&
dh->dccph_type == DCCP_PKT_DATA)) {
dccp_send_sync(sk, DCCP_SKB_CB(skb)->dccpd_seq,
DCCP_PKT_SYNC);
dccp_send_sync(sk, dcb->dccpd_seq, DCCP_PKT_SYNC);
goto discard;
} else if (dh->dccph_type == DCCP_PKT_CLOSEREQ) {
dccp_rcv_closereq(sk, skb);
@ -563,13 +563,13 @@ int dccp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
}
if (unlikely(dh->dccph_type == DCCP_PKT_SYNC)) {
dccp_send_sync(sk, DCCP_SKB_CB(skb)->dccpd_seq,
DCCP_PKT_SYNCACK);
dccp_send_sync(sk, dcb->dccpd_seq, DCCP_PKT_SYNCACK);
goto discard;
}
switch (sk->sk_state) {
case DCCP_CLOSED:
dcb->dccpd_reset_code = DCCP_RESET_CODE_NO_CONNECTION;
return 1;
case DCCP_REQUESTING:

10
net/dccp/ipv4.c
View File

@ -669,12 +669,16 @@ int dccp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
struct dccp_request_sock *dreq;
const __u32 saddr = skb->nh.iph->saddr;
const __u32 daddr = skb->nh.iph->daddr;
struct dccp_skb_cb *dcb = DCCP_SKB_CB(skb);
__u8 reset_code = DCCP_RESET_CODE_TOO_BUSY;
struct dst_entry *dst = NULL;
/* Never answer to DCCP_PKT_REQUESTs send to broadcast or multicast */
if (((struct rtable *)skb->dst)->rt_flags &
(RTCF_BROADCAST | RTCF_MULTICAST))
(RTCF_BROADCAST | RTCF_MULTICAST)) {
reset_code = DCCP_RESET_CODE_NO_CONNECTION;
goto drop;
}
/*
* TW buckets are converted to open requests without
@ -718,7 +722,7 @@ int dccp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
* dccp_create_openreq_child.
*/
dreq = dccp_rsk(req);
dreq->dreq_isr = DCCP_SKB_CB(skb)->dccpd_seq;
dreq->dreq_isr = dcb->dccpd_seq;
dreq->dreq_iss = dccp_v4_init_sequence(sk, skb);
dreq->dreq_service = dccp_hdr_request(skb)->dccph_req_service;
@ -735,6 +739,7 @@ drop_and_free:
__reqsk_free(req);
drop:
DCCP_INC_STATS_BH(DCCP_MIB_ATTEMPTFAILS);
dcb->dccpd_reset_code = reset_code;
return -1;
}
@ -1005,7 +1010,6 @@ int dccp_v4_do_rcv(struct sock *sk, struct sk_buff *skb)
return 0;
reset:
DCCP_SKB_CB(skb)->dccpd_reset_code = DCCP_RESET_CODE_NO_CONNECTION;
dccp_v4_ctl_send_reset(skb);
discard:
kfree_skb(skb);