提交 d23c7107 编写于 作者: G Gerrit Renker 提交者: David S. Miller

[DCCP]: Simplify jump labels in dccp_v{4,6}_rcv

This is a code simplification and was singled out from the
DCCPv6 Oops patch on
http://www.mail-archive.com/dccp@vger.kernel.org/msg00600.html

It mainly makes the code consistent between ipv{4,6}.c for the functions
        dccp_v4_rcv
        dccp_v6_rcv
and removes the do_time_wait label to simplify code somewhat.

Commiter note: fixed up a compile problem, trivial.
Signed-off-by: NGerrit Renker <gerrit@erg.abdn.ac.uk>
Signed-off-by: NArnaldo Carvalho de Melo <acme@mandriva.com>
上级 9b42078e
......@@ -910,8 +910,7 @@ static int dccp_v4_rcv(struct sk_buff *skb)
dccp_pr_debug_cat("\n");
} else {
DCCP_SKB_CB(skb)->dccpd_ack_seq = dccp_hdr_ack_seq(skb);
dccp_pr_debug_cat(", ack=%llu\n",
(unsigned long long)
dccp_pr_debug_cat(", ack=%llu\n", (unsigned long long)
DCCP_SKB_CB(skb)->dccpd_ack_seq);
}
......@@ -940,11 +939,10 @@ static int dccp_v4_rcv(struct sk_buff *skb)
* Generate Reset(No Connection) unless P.type == Reset
* Drop packet and return
*/
if (sk->sk_state == DCCP_TIME_WAIT) {
dccp_pr_debug("sk->sk_state == DCCP_TIME_WAIT: "
"do_time_wait\n");
goto do_time_wait;
dccp_pr_debug("sk->sk_state == DCCP_TIME_WAIT: do_time_wait\n");
inet_twsk_put(inet_twsk(sk));
goto no_dccp_socket;
}
if (!xfrm4_policy_check(sk, XFRM_POLICY_IN, skb))
......@@ -968,17 +966,12 @@ static int dccp_v4_rcv(struct sk_buff *skb)
}
discard_it:
/* Discard frame. */
kfree_skb(skb);
return 0;
discard_and_relse:
sock_put(sk);
goto discard_it;
do_time_wait:
inet_twsk_put(inet_twsk(sk));
goto no_dccp_socket;
}
static struct inet_connection_sock_af_ops dccp_ipv4_af_ops = {
......
......@@ -1071,8 +1071,11 @@ static int dccp_v6_rcv(struct sk_buff **pskb)
* Generate Reset(No Connection) unless P.type == Reset
* Drop packet and return
*/
if (sk == NULL)
if (sk == NULL) {
dccp_pr_debug("failed to look up flow ID in table and "
"get corresponding socket\n");
goto no_dccp_socket;
}
/*
* Step 2:
......@@ -1080,8 +1083,11 @@ static int dccp_v6_rcv(struct sk_buff **pskb)
* Generate Reset(No Connection) unless P.type == Reset
* Drop packet and return
*/
if (sk->sk_state == DCCP_TIME_WAIT)
goto do_time_wait;
if (sk->sk_state == DCCP_TIME_WAIT) {
dccp_pr_debug("sk->sk_state == DCCP_TIME_WAIT: do_time_wait\n");
inet_twsk_put(inet_twsk(sk));
goto no_dccp_socket;
}
if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb))
goto discard_and_relse;
......@@ -1101,22 +1107,14 @@ static int dccp_v6_rcv(struct sk_buff **pskb)
DCCP_RESET_CODE_NO_CONNECTION;
dccp_v6_ctl_send_reset(skb);
}
discard_it:
/*
* Discard frame
*/
discard_it:
kfree_skb(skb);
return 0;
discard_and_relse:
sock_put(sk);
goto discard_it;
do_time_wait:
inet_twsk_put(inet_twsk(sk));
goto no_dccp_socket;
}
static struct inet_connection_sock_af_ops dccp_ipv6_af_ops = {
......
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