diff options
Diffstat (limited to 'net/ipv6/exthdrs.c')
| -rw-r--r-- | net/ipv6/exthdrs.c | 78 |
1 files changed, 0 insertions, 78 deletions
diff --git a/net/ipv6/exthdrs.c b/net/ipv6/exthdrs.c index fc3a961..c82d4d4 100644 --- a/net/ipv6/exthdrs.c +++ b/net/ipv6/exthdrs.c @@ -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. **********************************/ |
