mirror of https://gitee.com/openkylin/linux.git
[IPV6]: Do not send RH0 anymore.
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
David S. Miller
parent
c382bb9d32
commit
bb4dbf9e61
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@ -874,8 +874,7 @@ accept_redirects - BOOLEAN
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accept_source_route - INTEGER
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Accept source routing (routing extension header).
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> 0: Accept routing header.
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= 0: Accept only routing header type 2.
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>= 0: Accept only routing header type 2.
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< 0: Do not accept routing header.
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Default: 0
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@ -27,8 +27,8 @@ struct in6_ifreq {
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int ifr6_ifindex;
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};
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#define IPV6_SRCRT_STRICT 0x01 /* this hop must be a neighbor */
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#define IPV6_SRCRT_TYPE_0 0 /* IPv6 type 0 Routing Header */
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#define IPV6_SRCRT_STRICT 0x01 /* Deprecated; will be removed */
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#define IPV6_SRCRT_TYPE_0 0 /* Deprecated; will be removed */
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#define IPV6_SRCRT_TYPE_2 2 /* IPv6 type 2 Routing Header */
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/*
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@ -512,10 +512,6 @@ extern int ipv6_ext_hdr(u8 nexthdr);
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extern int ipv6_find_tlv(struct sk_buff *skb, int offset, int type);
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extern struct ipv6_txoptions * ipv6_invert_rthdr(struct sock *sk,
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struct ipv6_rt_hdr *hdr);
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/*
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* socket options (ipv6_sockglue.c)
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*/
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@ -253,17 +253,6 @@ static int dccp_v6_send_response(struct sock *sk, struct request_sock *req,
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if (dst == NULL) {
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opt = np->opt;
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if (opt == NULL &&
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np->rxopt.bits.osrcrt == 2 &&
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ireq6->pktopts) {
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struct sk_buff *pktopts = ireq6->pktopts;
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struct inet6_skb_parm *rxopt = IP6CB(pktopts);
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if (rxopt->srcrt)
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opt = ipv6_invert_rthdr(sk,
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(struct ipv6_rt_hdr *)(skb_network_header(pktopts) +
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rxopt->srcrt));
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}
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if (opt != NULL && opt->srcrt != NULL) {
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const struct rt0_hdr *rt0 = (struct rt0_hdr *)opt->srcrt;
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@ -570,15 +559,6 @@ static struct sock *dccp_v6_request_recv_sock(struct sock *sk,
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if (sk_acceptq_is_full(sk))
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goto out_overflow;
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if (np->rxopt.bits.osrcrt == 2 && opt == NULL && ireq6->pktopts) {
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const struct inet6_skb_parm *rxopt = IP6CB(ireq6->pktopts);
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if (rxopt->srcrt)
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opt = ipv6_invert_rthdr(sk,
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(struct ipv6_rt_hdr *)(skb_network_header(ireq6->pktopts) +
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rxopt->srcrt));
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}
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if (dst == NULL) {
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struct in6_addr *final_p = NULL, final;
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struct flowi fl;
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@ -657,11 +657,10 @@ int datagram_send_ctl(struct msghdr *msg, struct flowi *fl,
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rthdr = (struct ipv6_rt_hdr *)CMSG_DATA(cmsg);
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switch (rthdr->type) {
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case IPV6_SRCRT_TYPE_0:
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#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
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case IPV6_SRCRT_TYPE_2:
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#endif
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break;
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#endif
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default:
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err = -EINVAL;
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goto exit_f;
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@ -427,18 +427,6 @@ static int ipv6_rthdr_rcv(struct sk_buff **skbp)
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}
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switch (hdr->type) {
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case IPV6_SRCRT_TYPE_0:
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if (accept_source_route <= 0)
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goto unknown_rh;
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if (hdr->hdrlen & 0x01) {
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IP6_INC_STATS_BH(ip6_dst_idev(skb->dst),
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IPSTATS_MIB_INHDRERRORS);
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icmpv6_param_prob(skb, ICMPV6_HDR_FIELD,
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((&hdr->hdrlen) -
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skb_network_header(skb)));
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return -1;
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}
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break;
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#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
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case IPV6_SRCRT_TYPE_2:
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if (accept_source_route < 0)
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@ -576,72 +564,6 @@ void __init ipv6_rthdr_init(void)
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printk(KERN_ERR "ipv6_rthdr_init: Could not register protocol\n");
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};
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/*
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This function inverts received rthdr.
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NOTE: specs allow to make it automatically only if
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packet authenticated.
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I will not discuss it here (though, I am really pissed off at
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this stupid requirement making rthdr idea useless)
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Actually, it creates severe problems for us.
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Embryonic requests has no associated sockets,
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so that user have no control over it and
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cannot not only to set reply options, but
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even to know, that someone wants to connect
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without success. :-(
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For now we need to test the engine, so that I created
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temporary (or permanent) backdoor.
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If listening socket set IPV6_RTHDR to 2, then we invert header.
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--ANK (980729)
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*/
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struct ipv6_txoptions *
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ipv6_invert_rthdr(struct sock *sk, struct ipv6_rt_hdr *hdr)
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{
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/* Received rthdr:
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[ H1 -> H2 -> ... H_prev ] daddr=ME
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Inverted result:
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[ H_prev -> ... -> H1 ] daddr =sender
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Note, that IP output engine will rewrite this rthdr
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by rotating it left by one addr.
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*/
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int n, i;
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struct rt0_hdr *rthdr = (struct rt0_hdr*)hdr;
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struct rt0_hdr *irthdr;
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struct ipv6_txoptions *opt;
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int hdrlen = ipv6_optlen(hdr);
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if (hdr->segments_left ||
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hdr->type != IPV6_SRCRT_TYPE_0 ||
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hdr->hdrlen & 0x01)
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return NULL;
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n = hdr->hdrlen >> 1;
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opt = sock_kmalloc(sk, sizeof(*opt) + hdrlen, GFP_ATOMIC);
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if (opt == NULL)
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return NULL;
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memset(opt, 0, sizeof(*opt));
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opt->tot_len = sizeof(*opt) + hdrlen;
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opt->srcrt = (void*)(opt+1);
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opt->opt_nflen = hdrlen;
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memcpy(opt->srcrt, hdr, sizeof(*hdr));
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irthdr = (struct rt0_hdr*)opt->srcrt;
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irthdr->reserved = 0;
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opt->srcrt->segments_left = n;
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for (i=0; i<n; i++)
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memcpy(irthdr->addr+i, rthdr->addr+(n-1-i), 16);
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return opt;
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}
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EXPORT_SYMBOL_GPL(ipv6_invert_rthdr);
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/**********************************
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Hop-by-hop options.
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**********************************/
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@ -416,11 +416,10 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
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if (optname == IPV6_RTHDR && opt && opt->srcrt) {
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struct ipv6_rt_hdr *rthdr = opt->srcrt;
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switch (rthdr->type) {
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case IPV6_SRCRT_TYPE_0:
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#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
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case IPV6_SRCRT_TYPE_2:
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#endif
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break;
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#endif
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default:
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goto sticky_done;
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}
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@ -484,17 +484,6 @@ static int tcp_v6_send_synack(struct sock *sk, struct request_sock *req,
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if (dst == NULL) {
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opt = np->opt;
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if (opt == NULL &&
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np->rxopt.bits.osrcrt == 2 &&
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treq->pktopts) {
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struct sk_buff *pktopts = treq->pktopts;
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struct inet6_skb_parm *rxopt = IP6CB(pktopts);
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if (rxopt->srcrt)
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opt = ipv6_invert_rthdr(sk,
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(struct ipv6_rt_hdr *)(skb_network_header(pktopts) +
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rxopt->srcrt));
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}
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if (opt && opt->srcrt) {
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struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt;
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ipv6_addr_copy(&final, &fl.fl6_dst);
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@ -1391,15 +1380,6 @@ static struct sock * tcp_v6_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
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if (sk_acceptq_is_full(sk))
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goto out_overflow;
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if (np->rxopt.bits.osrcrt == 2 &&
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opt == NULL && treq->pktopts) {
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struct inet6_skb_parm *rxopt = IP6CB(treq->pktopts);
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if (rxopt->srcrt)
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opt = ipv6_invert_rthdr(sk,
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(struct ipv6_rt_hdr *)(skb_network_header(treq->pktopts) +
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rxopt->srcrt));
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}
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if (dst == NULL) {
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struct in6_addr *final_p = NULL, final;
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struct flowi fl;
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