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[IPV6]: Do not send RH0 anymore.

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Based on <draft-ietf-ipv6-deprecate-rh0-00.txt>.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
YOSHIFUJI Hideaki
2007-07-10 22:55:49 -07:00
committed by David S. Miller
parent c382bb9d32
commit bb4dbf9e61
8 changed files with 5 additions and 130 deletions
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78
net/ipv6/exthdrs.c
View File

@@ -427,18 +427,6 @@ looped_back:
}
switch (hdr->type) {
case IPV6_SRCRT_TYPE_0:
if (accept_source_route <= 0)
goto unknown_rh;
if (hdr->hdrlen & 0x01) {
IP6_INC_STATS_BH(ip6_dst_idev(skb->dst),
IPSTATS_MIB_INHDRERRORS);
icmpv6_param_prob(skb, ICMPV6_HDR_FIELD,
((&hdr->hdrlen) -
skb_network_header(skb)));
return -1;
}
break;
#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
case IPV6_SRCRT_TYPE_2:
if (accept_source_route < 0)
@@ -576,72 +564,6 @@ void __init ipv6_rthdr_init(void)
printk(KERN_ERR "ipv6_rthdr_init: Could not register protocol\n");
};
/*
This function inverts received rthdr.
NOTE: specs allow to make it automatically only if
packet authenticated.
I will not discuss it here (though, I am really pissed off at
this stupid requirement making rthdr idea useless)
Actually, it creates severe problems for us.
Embryonic requests has no associated sockets,
so that user have no control over it and
cannot not only to set reply options, but
even to know, that someone wants to connect
without success. :-(
For now we need to test the engine, so that I created
temporary (or permanent) backdoor.
If listening socket set IPV6_RTHDR to 2, then we invert header.
--ANK (980729)
*/
struct ipv6_txoptions *
ipv6_invert_rthdr(struct sock *sk, struct ipv6_rt_hdr *hdr)
{
/* Received rthdr:
[ H1 -> H2 -> ... H_prev ] daddr=ME
Inverted result:
[ H_prev -> ... -> H1 ] daddr =sender
Note, that IP output engine will rewrite this rthdr
by rotating it left by one addr.
*/
int n, i;
struct rt0_hdr *rthdr = (struct rt0_hdr*)hdr;
struct rt0_hdr *irthdr;
struct ipv6_txoptions *opt;
int hdrlen = ipv6_optlen(hdr);
if (hdr->segments_left ||
hdr->type != IPV6_SRCRT_TYPE_0 ||
hdr->hdrlen & 0x01)
return NULL;
n = hdr->hdrlen >> 1;
opt = sock_kmalloc(sk, sizeof(*opt) + hdrlen, GFP_ATOMIC);
if (opt == NULL)
return NULL;
memset(opt, 0, sizeof(*opt));
opt->tot_len = sizeof(*opt) + hdrlen;
opt->srcrt = (void*)(opt+1);
opt->opt_nflen = hdrlen;
memcpy(opt->srcrt, hdr, sizeof(*hdr));
irthdr = (struct rt0_hdr*)opt->srcrt;
irthdr->reserved = 0;
opt->srcrt->segments_left = n;
for (i=0; i<n; i++)
memcpy(irthdr->addr+i, rthdr->addr+(n-1-i), 16);
return opt;
}
EXPORT_SYMBOL_GPL(ipv6_invert_rthdr);
/**********************************
Hop-by-hop options.
**********************************/