[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: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>

diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c
index ce8eed3..7107885 100644 (file)
--- a/net/dccp/ipv4.c
+++ b/net/dccp/ipv4.c
@@ -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 @@ no_dccp_socket:
        }
 
 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 = {

diff --git a/net/dccp/ipv6.c b/net/dccp/ipv6.c
index 116bddb..dee0853 100644 (file)
--- a/net/dccp/ipv6.c
+++ b/net/dccp/ipv6.c
@@ -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 @@ no_dccp_socket:
                                        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 = {