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[IPV6]: Check outgoing interface even if source address is unspecified.

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The outgoing interface index (ipi6_ifindex) in IPV6_PKTINFO
ancillary data, is not checked if the source address (ipi6_addr)
is unspecified.  If the ipi6_ifindex is the not-exist interface,
it should be fail.

Based on patch from Shan Wei <shanwei@cn.fujitsu.com> and
Brian Haley <brian.haley@hp.com>.

Signed-off-by: Shan Wei <shanwei@cn.fujitsu.com>
Signed-off-by: Brian Haley <brian.haley@hp.com>
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
This commit is contained in:
YOSHIFUJI Hideaki 2008-06-04 13:01:37 +09:00
parent 95b496b666
commit 187e38384c
1 changed files with 22 additions and 20 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

42
net/ipv6/datagram.c
View file

@ -509,7 +509,6 @@ int datagram_send_ctl(struct msghdr *msg, struct flowi *fl,
for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) {
int addr_type;
struct net_device *dev = NULL;
if (!CMSG_OK(msg, cmsg)) {
err = -EINVAL;
@ -522,6 +521,9 @@ int datagram_send_ctl(struct msghdr *msg, struct flowi *fl,
switch (cmsg->cmsg_type) {
case IPV6_PKTINFO:
case IPV6_2292PKTINFO:
{
struct net_device *dev = NULL;
if (cmsg->cmsg_len < CMSG_LEN(sizeof(struct in6_pktinfo))) {
err = -EINVAL;
goto exit_f;
@ -535,32 +537,32 @@ int datagram_send_ctl(struct msghdr *msg, struct flowi *fl,
fl->oif = src_info->ipi6_ifindex;
}
addr_type = ipv6_addr_type(&src_info->ipi6_addr);
addr_type = __ipv6_addr_type(&src_info->ipi6_addr);
if (addr_type == IPV6_ADDR_ANY)
break;
if (fl->oif) {
dev = dev_get_by_index(&init_net, fl->oif);
if (!dev)
return -ENODEV;
} else if (addr_type & IPV6_ADDR_LINKLOCAL)
return -EINVAL;
if (addr_type & IPV6_ADDR_LINKLOCAL) {
if (!src_info->ipi6_ifindex)
return -EINVAL;
else {
dev = dev_get_by_index(&init_net, src_info->ipi6_ifindex);
if (!dev)
return -ENODEV;
}
}
if (!ipv6_chk_addr(&init_net, &src_info->ipi6_addr,
dev, 0)) {
if (dev)
dev_put(dev);
err = -EINVAL;
goto exit_f;
if (addr_type != IPV6_ADDR_ANY) {
int strict = __ipv6_addr_src_scope(addr_type) <= IPV6_ADDR_SCOPE_LINKLOCAL;
if (!ipv6_chk_addr(&init_net, &src_info->ipi6_addr,
strict ? dev : NULL, 0))
err = -EINVAL;
else
ipv6_addr_copy(&fl->fl6_src, &src_info->ipi6_addr);
}
if (dev)
dev_put(dev);
ipv6_addr_copy(&fl->fl6_src, &src_info->ipi6_addr);
if (err)
goto exit_f;
break;
}
case IPV6_FLOWINFO:
if (cmsg->cmsg_len < CMSG_LEN(4)) {