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[IPV4]: Enable use of 240/4 address space.

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This short patch modifies the IPv4 networking to enable use of the
240.0.0.0/4 (aka "class-E") address space as propsed in the internet
draft draft-fuller-240space-00.txt.

Signed-off-by: Jan Engelhardt <jengelh@computergmbh.de>
Acked-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jan Engelhardt 2008-01-21 03:18:08 -08:00 committed by David S. Miller
parent 96750162b5
commit 1e637c74b0
5 changed files with 12 additions and 11 deletions
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5
include/linux/in.h
View file

@ -262,9 +262,10 @@ static inline bool ipv4_is_local_multicast(__be32 addr)
return (addr & htonl(0xffffff00)) == htonl(0xe0000000);
}
static inline bool ipv4_is_badclass(__be32 addr)
static inline bool ipv4_is_lbcast(__be32 addr)
{
return (addr & htonl(0xf0000000)) == htonl(0xf0000000);
/* limited broadcast */
return addr == INADDR_BROADCAST;
}
static inline bool ipv4_is_zeronet(__be32 addr)

2
include/net/addrconf.h
View file

@ -262,7 +262,7 @@ static inline int ipv6_isatap_eui64(u8 *eui, __be32 addr)
ipv4_is_private_172(addr) || ipv4_is_test_192(addr) ||
ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) ||
ipv4_is_test_198(addr) || ipv4_is_multicast(addr) ||
ipv4_is_badclass(addr)) ? 0x00 : 0x02;
ipv4_is_lbcast(addr)) ? 0x00 : 0x02;
eui[1] = 0;
eui[2] = 0x5E;
eui[3] = 0xFE;

2
net/core/pktgen.c
View file

@ -2266,7 +2266,7 @@ static void mod_cur_headers(struct pktgen_dev *pkt_dev)
while (ipv4_is_loopback(s) ||
ipv4_is_multicast(s) ||
ipv4_is_badclass(s) ||
ipv4_is_lbcast(s) ||
ipv4_is_zeronet(s) ||
ipv4_is_local_multicast(s)) {
t = random32() % (imx - imn) + imn;

2
net/ipv4/fib_frontend.c
View file

@ -176,7 +176,7 @@ static inline unsigned __inet_dev_addr_type(struct net *net,
unsigned ret = RTN_BROADCAST;
struct fib_table *local_table;
if (ipv4_is_zeronet(addr) || ipv4_is_badclass(addr))
if (ipv4_is_zeronet(addr) || ipv4_is_lbcast(addr))
return RTN_BROADCAST;
if (ipv4_is_multicast(addr))
return RTN_MULTICAST;

12
net/ipv4/route.c
View file

@ -1154,7 +1154,7 @@ void ip_rt_redirect(__be32 old_gw, __be32 daddr, __be32 new_gw,
return;
if (new_gw == old_gw || !IN_DEV_RX_REDIRECTS(in_dev)
|| ipv4_is_multicast(new_gw) || ipv4_is_badclass(new_gw)
|| ipv4_is_multicast(new_gw) || ipv4_is_lbcast(new_gw)
|| ipv4_is_zeronet(new_gw))
goto reject_redirect;
@ -1634,7 +1634,7 @@ static int ip_route_input_mc(struct sk_buff *skb, __be32 daddr, __be32 saddr,
if (in_dev == NULL)
return -EINVAL;
if (ipv4_is_multicast(saddr) || ipv4_is_badclass(saddr) ||
if (ipv4_is_multicast(saddr) || ipv4_is_lbcast(saddr) ||
ipv4_is_loopback(saddr) || skb->protocol != htons(ETH_P_IP))
goto e_inval;
@ -1891,7 +1891,7 @@ static int ip_route_input_slow(struct sk_buff *skb, __be32 daddr, __be32 saddr,
by fib_lookup.
*/
if (ipv4_is_multicast(saddr) || ipv4_is_badclass(saddr) ||
if (ipv4_is_multicast(saddr) || ipv4_is_lbcast(saddr) ||
ipv4_is_loopback(saddr))
goto martian_source;
@ -1904,7 +1904,7 @@ static int ip_route_input_slow(struct sk_buff *skb, __be32 daddr, __be32 saddr,
if (ipv4_is_zeronet(saddr))
goto martian_source;
if (ipv4_is_badclass(daddr) || ipv4_is_zeronet(daddr) ||
if (ipv4_is_lbcast(daddr) || ipv4_is_zeronet(daddr) ||
ipv4_is_loopback(daddr))
goto martian_destination;
@ -2125,7 +2125,7 @@ static inline int __mkroute_output(struct rtable **result,
res->type = RTN_BROADCAST;
else if (ipv4_is_multicast(fl->fl4_dst))
res->type = RTN_MULTICAST;
else if (ipv4_is_badclass(fl->fl4_dst) || ipv4_is_zeronet(fl->fl4_dst))
else if (ipv4_is_lbcast(fl->fl4_dst) || ipv4_is_zeronet(fl->fl4_dst))
return -EINVAL;
if (dev_out->flags & IFF_LOOPBACK)
@ -2276,7 +2276,7 @@ static int ip_route_output_slow(struct rtable **rp, const struct flowi *oldflp)
if (oldflp->fl4_src) {
err = -EINVAL;
if (ipv4_is_multicast(oldflp->fl4_src) ||
ipv4_is_badclass(oldflp->fl4_src) ||
ipv4_is_lbcast(oldflp->fl4_src) ||
ipv4_is_zeronet(oldflp->fl4_src))
goto out;