[DCCP]: Generalize dccp_v4_send_reset

Renaming it to dccp_send_reset and moving it from the ipv4 specific
code to the core dccp code.

This fixes some bugs in IPV6 where timers would send v4 resets, etc.

Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

5 files changed, 28 insertions, 38 deletions

diff --git a/net/dccp/dccp.h b/net/dccp/dccp.h
index f059541f5a1d..cd7c5d069ae4 100644
--- a/net/dccp/dccp.h
+++ b/net/dccp/dccp.h
@@ -235,9 +235,6 @@ extern void		dccp_close(struct sock *sk, long timeout);
 extern struct sk_buff   *dccp_make_response(struct sock *sk,
                                             struct dst_entry *dst,
                                             struct request_sock *req);
-extern struct sk_buff   *dccp_make_reset(struct sock *sk,
-                                         struct dst_entry *dst,
-                                         enum dccp_reset_codes code);
 
 extern int         dccp_connect(struct sock *sk);
 extern int         dccp_disconnect(struct sock *sk, int flags);
@@ -264,8 +261,7 @@ extern int	   dccp_v4_connect(struct sock *sk, struct sockaddr *uaddr,
 extern int         dccp_v4_checksum(const struct sk_buff *skb,
                                     const __be32 saddr, const __be32 daddr);
 
-extern int         dccp_v4_send_reset(struct sock *sk,
-                                      enum dccp_reset_codes code);
+extern int         dccp_send_reset(struct sock *sk, enum dccp_reset_codes code);
 extern void        dccp_send_close(struct sock *sk, const int active);
 extern int         dccp_invalid_packet(struct sk_buff *skb);
 
diff --git a/net/dccp/input.c b/net/dccp/input.c
index 67691a0592af..eac5178ce515 100644
--- a/net/dccp/input.c
+++ b/net/dccp/input.c
@@ -32,7 +32,7 @@ static void dccp_fin(struct sock *sk, struct sk_buff *skb)
 
 static void dccp_rcv_close(struct sock *sk, struct sk_buff *skb)
 {
-        dccp_v4_send_reset(sk, DCCP_RESET_CODE_CLOSED);
+        dccp_send_reset(sk, DCCP_RESET_CODE_CLOSED);
         dccp_fin(sk, skb);
         dccp_set_state(sk, DCCP_CLOSED);
         sk_wake_async(sk, 1, POLL_HUP);
diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c
index f94286e46c42..3baf4c76a89d 100644
--- a/net/dccp/ipv4.c
+++ b/net/dccp/ipv4.c
@@ -457,32 +457,6 @@ void dccp_v4_send_check(struct sock *sk, int len, struct sk_buff *skb)
 
 EXPORT_SYMBOL_GPL(dccp_v4_send_check);
 
-int dccp_v4_send_reset(struct sock *sk, enum dccp_reset_codes code)
-{
-        struct sk_buff *skb;
-        /*
-         * FIXME: what if rebuild_header fails?
-         * Should we be doing a rebuild_header here?
-         */
-        int err = inet_sk_rebuild_header(sk);
-
-        if (err != 0)
-                return err;
-
-        skb = dccp_make_reset(sk, sk->sk_dst_cache, code);
-        if (skb != NULL) {
-                const struct inet_sock *inet = inet_sk(sk);
-
-                memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));
-                err = ip_build_and_send_pkt(skb, sk,
-                                            inet->saddr, inet->daddr, NULL);
-                if (err == NET_XMIT_CN)
-                        err = 0;
-        }
-
-        return err;
-}
-
 static inline u64 dccp_v4_init_sequence(const struct sock *sk,
                                         const struct sk_buff *skb)
 {
diff --git a/net/dccp/output.c b/net/dccp/output.c
index 0cc2bcf56522..9922d2696b9c 100644
--- a/net/dccp/output.c
+++ b/net/dccp/output.c
@@ -323,8 +323,8 @@ struct sk_buff *dccp_make_response(struct sock *sk, struct dst_entry *dst,
 
 EXPORT_SYMBOL_GPL(dccp_make_response);
 
-struct sk_buff *dccp_make_reset(struct sock *sk, struct dst_entry *dst,
-                                const enum dccp_reset_codes code)
+static struct sk_buff *dccp_make_reset(struct sock *sk, struct dst_entry *dst,
+                                       const enum dccp_reset_codes code)
                                    
 {
         struct dccp_hdr *dh;
@@ -366,14 +366,34 @@ struct sk_buff *dccp_make_reset(struct sock *sk, struct dst_entry *dst,
         dccp_hdr_set_ack(dccp_hdr_ack_bits(skb), dp->dccps_gsr);
 
         dccp_hdr_reset(skb)->dccph_reset_code = code;
-
-        dh->dccph_checksum = dccp_v4_checksum(skb, inet_sk(sk)->saddr,
-                                              inet_sk(sk)->daddr);
+        inet_csk(sk)->icsk_af_ops->send_check(sk, skb->len, skb);
 
         DCCP_INC_STATS(DCCP_MIB_OUTSEGS);
         return skb;
 }
 
+int dccp_send_reset(struct sock *sk, enum dccp_reset_codes code)
+{
+        /*
+         * FIXME: what if rebuild_header fails?
+         * Should we be doing a rebuild_header here?
+         */
+        int err = inet_sk_rebuild_header(sk);
+
+        if (err == 0) {
+                struct sk_buff *skb = dccp_make_reset(sk, sk->sk_dst_cache,
+                                                      code);
+                if (skb != NULL) {
+                        memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));
+                        err = inet_csk(sk)->icsk_af_ops->queue_xmit(skb, 0);
+                        if (err == NET_XMIT_CN)
+                                err = 0;
+                }
+        }
+
+        return err;
+}
+
 /*
  * Do all connect socket setups that can be done AF independent.
  */
diff --git a/net/dccp/timer.c b/net/dccp/timer.c
index d7c786608ec6..5244415e5f18 100644
--- a/net/dccp/timer.c
+++ b/net/dccp/timer.c
@@ -31,7 +31,7 @@ static void dccp_write_err(struct sock *sk)
         sk->sk_err = sk->sk_err_soft ? : ETIMEDOUT;
         sk->sk_error_report(sk);
 
-        dccp_v4_send_reset(sk, DCCP_RESET_CODE_ABORTED);
+        dccp_send_reset(sk, DCCP_RESET_CODE_ABORTED);
         dccp_done(sk);
         DCCP_INC_STATS_BH(DCCP_MIB_ABORTONTIMEOUT);
 }