1 files changed, 29 insertions, 15 deletions

diff --git a/net/dccp/input.c b/net/dccp/input.c
index 779d0ed9ae94..5eb443f656c1 100644
--- a/net/dccp/input.c
+++ b/net/dccp/input.c
@@ -163,7 +163,7 @@ static void dccp_event_ack_recv(struct sock *sk, struct sk_buff *skb)
 {
         struct dccp_sock *dp = dccp_sk(sk);
 
-        if (dccp_msk(sk)->dccpms_send_ack_vector)
+        if (dp->dccps_hc_rx_ackvec != NULL)
                 dccp_ackvec_check_rcv_ackno(dp->dccps_hc_rx_ackvec, sk,
                                             DCCP_SKB_CB(skb)->dccpd_ack_seq);
 }
@@ -375,7 +375,7 @@ int dccp_rcv_established(struct sock *sk, struct sk_buff *skb,
         if (DCCP_SKB_CB(skb)->dccpd_ack_seq != DCCP_PKT_WITHOUT_ACK_SEQ)
                 dccp_event_ack_recv(sk, skb);
 
-        if (dccp_msk(sk)->dccpms_send_ack_vector &&
+        if (dp->dccps_hc_rx_ackvec != NULL &&
             dccp_ackvec_add(dp->dccps_hc_rx_ackvec, sk,
                             DCCP_SKB_CB(skb)->dccpd_seq,
                             DCCP_ACKVEC_STATE_RECEIVED))
@@ -421,20 +421,19 @@ static int dccp_rcv_request_sent_state_process(struct sock *sk,
                         goto out_invalid_packet;
                 }
 
+                /*
+                 * If option processing (Step 8) failed, return 1 here so that
+                 * dccp_v4_do_rcv() sends a Reset. The Reset code depends on
+                 * the option type and is set in dccp_parse_options().
+                 */
                 if (dccp_parse_options(sk, NULL, skb))
-                        goto out_invalid_packet;
+                        return 1;
 
                 /* Obtain usec RTT sample from SYN exchange (used by CCID 3) */
                 if (likely(dp->dccps_options_received.dccpor_timestamp_echo))
                         dp->dccps_syn_rtt = dccp_sample_rtt(sk, 10 * (tstamp -
                             dp->dccps_options_received.dccpor_timestamp_echo));
 
-                if (dccp_msk(sk)->dccpms_send_ack_vector &&
-                    dccp_ackvec_add(dp->dccps_hc_rx_ackvec, sk,
-                                    DCCP_SKB_CB(skb)->dccpd_seq,
-                                    DCCP_ACKVEC_STATE_RECEIVED))
-                        goto out_invalid_packet; /* FIXME: change error code */
-
                 /* Stop the REQUEST timer */
                 inet_csk_clear_xmit_timer(sk, ICSK_TIME_RETRANS);
                 WARN_ON(sk->sk_send_head == NULL);
@@ -475,6 +474,15 @@ static int dccp_rcv_request_sent_state_process(struct sock *sk,
                  */
                 dccp_set_state(sk, DCCP_PARTOPEN);
 
+                /*
+                 * If feature negotiation was successful, activate features now;
+                 * an activation failure means that this host could not activate
+                 * one ore more features (e.g. insufficient memory), which would
+                 * leave at least one feature in an undefined state.
+                 */
+                if (dccp_feat_activate_values(sk, &dp->dccps_featneg))
+                        goto unable_to_proceed;
+
                 /* Make sure socket is routed, for correct metrics. */
                 icsk->icsk_af_ops->rebuild_header(sk);
 
@@ -509,6 +517,16 @@ out_invalid_packet:
         /* dccp_v4_do_rcv will send a reset */
         DCCP_SKB_CB(skb)->dccpd_reset_code = DCCP_RESET_CODE_PACKET_ERROR;
         return 1;
+
+unable_to_proceed:
+        DCCP_SKB_CB(skb)->dccpd_reset_code = DCCP_RESET_CODE_ABORTED;
+        /*
+         * We mark this socket as no longer usable, so that the loop in
+         * dccp_sendmsg() terminates and the application gets notified.
+         */
+        dccp_set_state(sk, DCCP_CLOSED);
+        sk->sk_err = ECOMM;
+        return 1;
 }
 
 static int dccp_rcv_respond_partopen_state_process(struct sock *sk,
@@ -590,8 +608,6 @@ int dccp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
                         if (inet_csk(sk)->icsk_af_ops->conn_request(sk,
                                                                     skb) < 0)
                                 return 1;
-
-                        /* FIXME: do congestion control initialization */
                         goto discard;
                 }
                 if (dh->dccph_type == DCCP_PKT_RESET)
@@ -602,7 +618,7 @@ int dccp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
                 return 1;
         }
 
-        if (sk->sk_state != DCCP_REQUESTING) {
+        if (sk->sk_state != DCCP_REQUESTING && sk->sk_state != DCCP_RESPOND) {
                 if (dccp_check_seqno(sk, skb))
                         goto discard;
 
@@ -615,7 +631,7 @@ int dccp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
                 if (dcb->dccpd_ack_seq != DCCP_PKT_WITHOUT_ACK_SEQ)
                         dccp_event_ack_recv(sk, skb);
 
-                if (dccp_msk(sk)->dccpms_send_ack_vector &&
+                if (dp->dccps_hc_rx_ackvec != NULL &&
                     dccp_ackvec_add(dp->dccps_hc_rx_ackvec, sk,
                                     DCCP_SKB_CB(skb)->dccpd_seq,
                                     DCCP_ACKVEC_STATE_RECEIVED))
@@ -667,8 +683,6 @@ int dccp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
                 return 1;
 
         case DCCP_REQUESTING:
-                /* FIXME: do congestion control initialization */
-
                 queued = dccp_rcv_request_sent_state_process(sk, skb, dh, len);
                 if (queued >= 0)
                         return queued;