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net: relax PKTINFO non local ipv6 udp xmit check

Browse Source 
Allow transparent sockets to be less restrictive about
the source ip of ipv6 udp packets being sent.

Google-Bug-Id: 5018138
Signed-off-by: Maciej Żenczykowski <maze@google.com>
CC: "Erik Kline" <ek@google.com>
CC: "Lorenzo Colitti" <lorenzo@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Maciej Żenczykowski 2011-08-28 12:35:31 +00:00 committed by David S. Miller
parent 0f43dd546d
commit ec0506dbe4
6 changed files with 13 additions and 11 deletions
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1
include/net/transp_v6.h
View File

@ -39,6 +39,7 @@ extern int datagram_recv_ctl(struct sock *sk,
struct sk_buff *skb);
extern int datagram_send_ctl(struct net *net,
struct sock *sk,
struct msghdr *msg,
struct flowi6 *fl6,
struct ipv6_txoptions *opt,

5
net/ipv6/datagram.c
View File

@ -599,7 +599,7 @@ int datagram_recv_ctl(struct sock *sk, struct msghdr *msg, struct sk_buff *skb)
return 0;
}
int datagram_send_ctl(struct net *net,
int datagram_send_ctl(struct net *net, struct sock *sk,
struct msghdr *msg, struct flowi6 *fl6,
struct ipv6_txoptions *opt,
int *hlimit, int *tclass, int *dontfrag)
@ -658,7 +658,8 @@ int datagram_send_ctl(struct net *net,
if (addr_type != IPV6_ADDR_ANY) {
int strict = __ipv6_addr_src_scope(addr_type) <= IPV6_ADDR_SCOPE_LINKLOCAL;
if (!ipv6_chk_addr(net, &src_info->ipi6_addr,
if (!inet_sk(sk)->transparent &&
!ipv6_chk_addr(net, &src_info->ipi6_addr,
strict ? dev : NULL, 0))
err = -EINVAL;
else

8
net/ipv6/ip6_flowlabel.c
View File

@ -322,8 +322,8 @@ static int fl6_renew(struct ip6_flowlabel *fl, unsigned long linger, unsigned lo
}
static struct ip6_flowlabel *
fl_create(struct net *net, struct in6_flowlabel_req *freq, char __user *optval,
int optlen, int *err_p)
fl_create(struct net *net, struct sock *sk, struct in6_flowlabel_req *freq,
char __user *optval, int optlen, int *err_p)
{
struct ip6_flowlabel *fl = NULL;
int olen;
@ -360,7 +360,7 @@ fl_create(struct net *net, struct in6_flowlabel_req *freq, char __user *optval,
msg.msg_control = (void*)(fl->opt+1);
memset(&flowi6, 0, sizeof(flowi6));
err = datagram_send_ctl(net, &msg, &flowi6, fl->opt, &junk,
err = datagram_send_ctl(net, sk, &msg, &flowi6, fl->opt, &junk,
&junk, &junk);
if (err)
goto done;
@ -528,7 +528,7 @@ int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen)
if (freq.flr_label & ~IPV6_FLOWLABEL_MASK)
return -EINVAL;
fl = fl_create(net, &freq, optval, optlen, &err);
fl = fl_create(net, sk, &freq, optval, optlen, &err);
if (fl == NULL)
return err;
sfl1 = kmalloc(sizeof(*sfl1), GFP_KERNEL);

2
net/ipv6/ipv6_sockglue.c
View File

@ -475,7 +475,7 @@ sticky_done:
msg.msg_controllen = optlen;
msg.msg_control = (void*)(opt+1);
retv = datagram_send_ctl(net, &msg, &fl6, opt, &junk, &junk,
retv = datagram_send_ctl(net, sk, &msg, &fl6, opt, &junk, &junk,
&junk);
if (retv)
goto done;

4
net/ipv6/raw.c
View File

@ -817,8 +817,8 @@ static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
memset(opt, 0, sizeof(struct ipv6_txoptions));
opt->tot_len = sizeof(struct ipv6_txoptions);
err = datagram_send_ctl(sock_net(sk), msg, &fl6, opt, &hlimit,
&tclass, &dontfrag);
err = datagram_send_ctl(sock_net(sk), sk, msg, &fl6, opt,
&hlimit, &tclass, &dontfrag);
if (err < 0) {
fl6_sock_release(flowlabel);
return err;

4
net/ipv6/udp.c
View File

@ -1090,8 +1090,8 @@ do_udp_sendmsg:
memset(opt, 0, sizeof(struct ipv6_txoptions));
opt->tot_len = sizeof(*opt);
err = datagram_send_ctl(sock_net(sk), msg, &fl6, opt, &hlimit,
&tclass, &dontfrag);
err = datagram_send_ctl(sock_net(sk), sk, msg, &fl6, opt,
&hlimit, &tclass, &dontfrag);
if (err < 0) {
fl6_sock_release(flowlabel);
return err;