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Diffstat (limited to 'net/dccp/ipv4.c')
-rw-r--r--net/dccp/ipv4.c38
1 files changed, 5 insertions, 33 deletions
diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c
index 58a79c2ae55..2312b9f4d7a 100644
--- a/net/dccp/ipv4.c
+++ b/net/dccp/ipv4.c
@@ -510,17 +510,12 @@ out:
static void dccp_v4_ctl_send_reset(struct sock *sk, struct sk_buff *rxskb)
{
int err;
- struct dccp_hdr *rxdh = dccp_hdr(rxskb), *dh;
const struct iphdr *rxiph;
- const int dccp_hdr_reset_len = sizeof(struct dccp_hdr) +
- sizeof(struct dccp_hdr_ext) +
- sizeof(struct dccp_hdr_reset);
struct sk_buff *skb;
struct dst_entry *dst;
- u64 seqno = 0;
/* Never send a reset in response to a reset. */
- if (rxdh->dccph_type == DCCP_PKT_RESET)
+ if (dccp_hdr(rxskb)->dccph_type == DCCP_PKT_RESET)
return;
if (((struct rtable *)rxskb->dst)->rt_type != RTN_LOCAL)
@@ -530,37 +525,14 @@ static void dccp_v4_ctl_send_reset(struct sock *sk, struct sk_buff *rxskb)
if (dst == NULL)
return;
- skb = alloc_skb(dccp_v4_ctl_socket->sk->sk_prot->max_header,
- GFP_ATOMIC);
+ skb = dccp_ctl_make_reset(dccp_v4_ctl_socket, rxskb);
if (skb == NULL)
goto out;
- /* Reserve space for headers. */
- skb_reserve(skb, dccp_v4_ctl_socket->sk->sk_prot->max_header);
- skb->dst = dst_clone(dst);
-
- dh = dccp_zeroed_hdr(skb, dccp_hdr_reset_len);
-
- /* Build DCCP header and checksum it. */
- dh->dccph_type = DCCP_PKT_RESET;
- dh->dccph_sport = rxdh->dccph_dport;
- dh->dccph_dport = rxdh->dccph_sport;
- dh->dccph_doff = dccp_hdr_reset_len / 4;
- dh->dccph_x = 1;
- dccp_hdr_reset(skb)->dccph_reset_code =
- DCCP_SKB_CB(rxskb)->dccpd_reset_code;
-
- /* See "8.3.1. Abnormal Termination" in RFC 4340 */
- if (DCCP_SKB_CB(rxskb)->dccpd_ack_seq != DCCP_PKT_WITHOUT_ACK_SEQ)
- seqno = ADD48(DCCP_SKB_CB(rxskb)->dccpd_ack_seq, 1);
-
- dccp_hdr_set_seq(dh, seqno);
- dccp_hdr_set_ack(dccp_hdr_ack_bits(skb), DCCP_SKB_CB(rxskb)->dccpd_seq);
-
- dccp_csum_outgoing(skb);
rxiph = ip_hdr(rxskb);
- dh->dccph_checksum = dccp_v4_csum_finish(skb, rxiph->saddr,
- rxiph->daddr);
+ dccp_hdr(skb)->dccph_checksum = dccp_v4_csum_finish(skb, rxiph->saddr,
+ rxiph->daddr);
+ skb->dst = dst_clone(dst);
bh_lock_sock(dccp_v4_ctl_socket->sk);
err = ip_build_and_send_pkt(skb, dccp_v4_ctl_socket->sk,