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[IPV6]: Check connect(2) status for IPv6 UDP socket (Re: xfrm_lookup)

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I think we should cache the per-socket route(dst_entry) only when the
IPv6 UDP socket is connect(2)'ed.
(which is same as IPv4 UDP send behavior)

Signed-off-by: Mitsuru KANDA <mk@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Mitsuru KANDA 2005-09-18 00:30:08 -07:00 committed by David S. Miller
parent 40abc27066
commit 987905ded3
1 changed files with 8 additions and 2 deletions
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10
net/ipv6/udp.c
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@ -639,6 +639,7 @@ static int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk,
int tclass = -1;
int corkreq = up->corkflag || msg->msg_flags&MSG_MORE;
int err;
int connected = 0;
/* destination address check */
if (sin6) {
@ -748,6 +749,7 @@ do_udp_sendmsg:
fl->fl_ip_dport = inet->dport;
daddr = &np->daddr;
fl->fl6_flowlabel = np->flow_label;
connected = 1;
}
if (!fl->oif)
@ -770,6 +772,7 @@ do_udp_sendmsg:
}
if (!(opt->opt_nflen|opt->opt_flen))
opt = NULL;
connected = 0;
}
if (opt == NULL)
opt = np->opt;
@ -787,10 +790,13 @@ do_udp_sendmsg:
ipv6_addr_copy(&final, &fl->fl6_dst);
ipv6_addr_copy(&fl->fl6_dst, rt0->addr);
final_p = &final;
connected = 0;
}
if (!fl->oif && ipv6_addr_is_multicast(&fl->fl6_dst))
if (!fl->oif && ipv6_addr_is_multicast(&fl->fl6_dst)) {
fl->oif = np->mcast_oif;
connected = 0;
}
err = ip6_dst_lookup(sk, &dst, fl);
if (err)
@ -846,7 +852,7 @@ do_append_data:
else if (!corkreq)
err = udp_v6_push_pending_frames(sk, up);
if (dst)
if (dst && connected)
ip6_dst_store(sk, dst,
ipv6_addr_equal(&fl->fl6_dst, &np->daddr) ?
&np->daddr : NULL);