dccp: remove unnecessary codes in ipv6.c
opt always equals np->opts, so it is meaningless to define opt, and check if opt does not equal np->opts and then try to free opt. Signed-off-by: RongQing.Li <roy.qing.li@gmail.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -239,7 +239,6 @@ static int dccp_v6_send_response(struct sock *sk, struct request_sock *req,
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struct inet6_request_sock *ireq6 = inet6_rsk(req);
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struct ipv6_pinfo *np = inet6_sk(sk);
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struct sk_buff *skb;
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struct ipv6_txoptions *opt = NULL;
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struct in6_addr *final_p, final;
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struct flowi6 fl6;
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int err = -1;
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@ -255,9 +254,8 @@ static int dccp_v6_send_response(struct sock *sk, struct request_sock *req,
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fl6.fl6_sport = inet_rsk(req)->loc_port;
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security_req_classify_flow(req, flowi6_to_flowi(&fl6));
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opt = np->opt;
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final_p = fl6_update_dst(&fl6, opt, &final);
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final_p = fl6_update_dst(&fl6, np->opt, &final);
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dst = ip6_dst_lookup_flow(sk, &fl6, final_p, false);
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if (IS_ERR(dst)) {
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@ -274,13 +272,11 @@ static int dccp_v6_send_response(struct sock *sk, struct request_sock *req,
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&ireq6->loc_addr,
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&ireq6->rmt_addr);
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fl6.daddr = ireq6->rmt_addr;
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err = ip6_xmit(sk, skb, &fl6, opt, np->tclass);
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err = ip6_xmit(sk, skb, &fl6, np->opt, np->tclass);
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err = net_xmit_eval(err);
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}
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done:
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if (opt != NULL && opt != np->opt)
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sock_kfree_s(sk, opt, opt->tot_len);
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dst_release(dst);
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return err;
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}
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@ -475,7 +471,6 @@ static struct sock *dccp_v6_request_recv_sock(struct sock *sk,
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struct inet_sock *newinet;
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struct dccp6_sock *newdp6;
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struct sock *newsk;
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struct ipv6_txoptions *opt;
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if (skb->protocol == htons(ETH_P_IP)) {
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/*
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@ -520,7 +515,6 @@ static struct sock *dccp_v6_request_recv_sock(struct sock *sk,
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return newsk;
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}
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opt = np->opt;
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if (sk_acceptq_is_full(sk))
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goto out_overflow;
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@ -532,7 +526,7 @@ static struct sock *dccp_v6_request_recv_sock(struct sock *sk,
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memset(&fl6, 0, sizeof(fl6));
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fl6.flowi6_proto = IPPROTO_DCCP;
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fl6.daddr = ireq6->rmt_addr;
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final_p = fl6_update_dst(&fl6, opt, &final);
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final_p = fl6_update_dst(&fl6, np->opt, &final);
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fl6.saddr = ireq6->loc_addr;
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fl6.flowi6_oif = sk->sk_bound_dev_if;
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fl6.fl6_dport = inet_rsk(req)->rmt_port;
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@ -597,11 +591,8 @@ static struct sock *dccp_v6_request_recv_sock(struct sock *sk,
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* Yes, keeping reference count would be much more clever, but we make
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* one more one thing there: reattach optmem to newsk.
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*/
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if (opt != NULL) {
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newnp->opt = ipv6_dup_options(newsk, opt);
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if (opt != np->opt)
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sock_kfree_s(sk, opt, opt->tot_len);
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}
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if (np->opt != NULL)
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newnp->opt = ipv6_dup_options(newsk, np->opt);
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inet_csk(newsk)->icsk_ext_hdr_len = 0;
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if (newnp->opt != NULL)
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@ -627,8 +618,6 @@ out_nonewsk:
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dst_release(dst);
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out:
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NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_LISTENDROPS);
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if (opt != NULL && opt != np->opt)
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sock_kfree_s(sk, opt, opt->tot_len);
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return NULL;
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}
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