[IPV6]: Kill obsolete functions (ip6_frag_xmit() and ip6_build_xmit()).

include/net/ipv6.h

@@ -329,13 +329,6 @@ extern int			ip6_nd_hdr(struct sock *sk,
 					   struct in6_addr *daddr,
 					   int proto, int len);
 
-extern int			ip6_build_xmit(struct sock *sk,
-					       inet_getfrag_t getfrag,
-					       const void *data,
-					       struct flowi *fl,
-					       unsigned length,
-					       struct ipv6_txoptions *opt,
-					       int hlimit, int flags);
 extern int			ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr);
 
 extern int			ip6_append_data(struct sock *sk,

net/ipv6/ip6_output.c

@@ -304,422 +304,6 @@ int ip6_nd_hdr(struct sock *sk, struct sk_buff *skb, struct net_device *dev,
 	return 0;
 }
 
-static struct ipv6hdr * ip6_bld_1(struct sock *sk, struct sk_buff *skb, struct flowi *fl,
-				  int hlimit, unsigned pktlength)
-{
-	struct ipv6hdr *hdr;
-	
-	skb->nh.raw = skb_put(skb, sizeof(struct ipv6hdr));
-	hdr = skb->nh.ipv6h;
-	
-	*(u32*)hdr = fl->fl6_flowlabel | htonl(0x60000000);
-
-	hdr->payload_len = htons(pktlength - sizeof(struct ipv6hdr));
-	hdr->hop_limit = hlimit;
-	hdr->nexthdr = fl->proto;
-
-	ipv6_addr_copy(&hdr->saddr, &fl->fl6_src);
-	ipv6_addr_copy(&hdr->daddr, &fl->fl6_dst);
-	return hdr;
-}
-
-static __inline__ u8 * ipv6_build_fraghdr(struct sk_buff *skb, u8* prev_hdr, unsigned offset)
-{
-	struct frag_hdr *fhdr;
-
-	fhdr = (struct frag_hdr *) skb_put(skb, sizeof(struct frag_hdr));
-
-	fhdr->nexthdr  = *prev_hdr;
-	*prev_hdr = NEXTHDR_FRAGMENT;
-	prev_hdr = &fhdr->nexthdr;
-
-	fhdr->reserved = 0;
-	fhdr->frag_off = htons(offset);
-	ipv6_select_ident(skb, fhdr);
-	return &fhdr->nexthdr;
-}
-
-static int ip6_frag_xmit(struct sock *sk, inet_getfrag_t getfrag,
-			 const void *data, struct dst_entry *dst,
-			 struct flowi *fl, struct ipv6_txoptions *opt,
-			 struct in6_addr *final_dst,
-			 int hlimit, int flags, unsigned length, int mtu)
-{
-	struct ipv6hdr *hdr;
-	struct sk_buff *last_skb;
-	u8 *prev_hdr;
-	int unfrag_len;
-	int frag_len;
-	int last_len;
-	int nfrags;
-	int fhdr_dist;
-	int frag_off;
-	int data_off;
-	int err;
-
-	/*
-	 *	Fragmentation
-	 *
-	 *	Extension header order:
-	 *	Hop-by-hop -> Dest0 -> Routing -> Fragment -> Auth -> Dest1 -> rest (...)
-	 *	
-	 *	We must build the non-fragmented part that
-	 *	will be in every packet... this also means
-	 *	that other extension headers (Dest, Auth, etc)
-	 *	must be considered in the data to be fragmented
-	 */
-
-	unfrag_len = sizeof(struct ipv6hdr) + sizeof(struct frag_hdr);
-	last_len = length;
-
-	if (opt) {
-		unfrag_len += opt->opt_nflen;
-		last_len += opt->opt_flen;
-	}
-
-	/*
-	 *	Length of fragmented part on every packet but 
-	 *	the last must be an:
-	 *	"integer multiple of 8 octets".
-	 */
-
-	frag_len = (mtu - unfrag_len) & ~0x7;
-
-	/* Unfragmentable part exceeds mtu. */
-	if (frag_len <= 0) {
-		ipv6_local_error(sk, EMSGSIZE, fl, mtu);
-		return -EMSGSIZE;
-	}
-
-	nfrags = last_len / frag_len;
-
-	/*
-	 *	We must send from end to start because of 
-	 *	UDP/ICMP checksums. We do a funny trick:
-	 *	fill the last skb first with the fixed
-	 *	header (and its data) and then use it
-	 *	to create the following segments and send it
-	 *	in the end. If the peer is checking the M_flag
-	 *	to trigger the reassembly code then this 
-	 *	might be a good idea.
-	 */
-
-	frag_off = nfrags * frag_len;
-	last_len -= frag_off;
-
-	if (last_len == 0) {
-		last_len = frag_len;
-		frag_off -= frag_len;
-		nfrags--;
-	}
-	data_off = frag_off;
-
-	/* And it is implementation problem: for now we assume, that
-	   all the exthdrs will fit to the first fragment.
-	 */
-	if (opt) {
-		if (frag_len < opt->opt_flen) {
-			ipv6_local_error(sk, EMSGSIZE, fl, mtu);
-			return -EMSGSIZE;
-		}
-		data_off = frag_off - opt->opt_flen;
-	}
-
-	if (flags&MSG_PROBE)
-		return 0;
-
-	last_skb = sock_alloc_send_skb(sk, unfrag_len + frag_len +
-				       dst->dev->hard_header_len + 15,
-				       flags & MSG_DONTWAIT, &err);
-
-	if (last_skb == NULL)
-		return err;
-
-	last_skb->dst = dst_clone(dst);
-
-	skb_reserve(last_skb, (dst->dev->hard_header_len + 15) & ~15);
-
-	hdr = ip6_bld_1(sk, last_skb, fl, hlimit, frag_len+unfrag_len);
-	prev_hdr = &hdr->nexthdr;
-
-	if (opt && opt->opt_nflen)
-		prev_hdr = ipv6_build_nfrag_opts(last_skb, prev_hdr, opt, final_dst, 0);
-
-	prev_hdr = ipv6_build_fraghdr(last_skb, prev_hdr, frag_off);
-	fhdr_dist = prev_hdr - last_skb->data;
-
-	err = getfrag(data, &hdr->saddr, last_skb->tail, data_off, last_len);
-
-	if (!err) {
-		while (nfrags--) {
-			struct sk_buff *skb;
-			
-			struct frag_hdr *fhdr2;
-				
-			skb = skb_copy(last_skb, sk->sk_allocation);
-
-			if (skb == NULL) {
-				IP6_INC_STATS(Ip6FragFails);
-				kfree_skb(last_skb);
-				return -ENOMEM;
-			}
-
-			frag_off -= frag_len;
-			data_off -= frag_len;
-
-			fhdr2 = (struct frag_hdr *) (skb->data + fhdr_dist);
-
-			/* more flag on */
-			fhdr2->frag_off = htons(frag_off | 1);
-
-			/* Write fragmentable exthdrs to the first chunk */
-			if (nfrags == 0 && opt && opt->opt_flen) {
-				ipv6_build_frag_opts(skb, &fhdr2->nexthdr, opt);
-				frag_len -= opt->opt_flen;
-				data_off = 0;
-			}
-
-			err = getfrag(data, &hdr->saddr,skb_put(skb, frag_len),
-				      data_off, frag_len);
-
-			if (err) {
-				kfree_skb(skb);
-				break;
-			}
-
-			IP6_INC_STATS(Ip6FragCreates);
-			IP6_INC_STATS(Ip6OutRequests);
-			err = NF_HOOK(PF_INET6,NF_IP6_LOCAL_OUT, skb, NULL, dst->dev, ip6_maybe_reroute);
-			if (err) {
-				kfree_skb(last_skb);
-				return err;
-			}
-		}
-	}
-
-	if (err) {
-		IP6_INC_STATS(Ip6FragFails);
-		kfree_skb(last_skb);
-		return -EFAULT;
-	}
-
-	hdr->payload_len = htons(unfrag_len + last_len - sizeof(struct ipv6hdr));
-
-	/*
-	 *	update last_skb to reflect the getfrag we did
-	 *	on start.
-	 */
-
-	skb_put(last_skb, last_len);
-
-	IP6_INC_STATS(Ip6FragCreates);
-	IP6_INC_STATS(Ip6FragOKs);
-	IP6_INC_STATS(Ip6OutRequests);
-	return NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, last_skb, NULL,dst->dev, ip6_maybe_reroute);
-}
-
-int ip6_build_xmit(struct sock *sk, inet_getfrag_t getfrag, const void *data,
-		   struct flowi *fl, unsigned length,
-		   struct ipv6_txoptions *opt, int hlimit, int flags)
-{
-	struct inet_opt *inet = inet_sk(sk);
-	struct ipv6_pinfo *np = inet6_sk(sk);
-	struct in6_addr final_dst_buf, *final_dst = NULL;
-	struct dst_entry *dst;
-	int err = 0;
-	unsigned int pktlength, jumbolen, mtu;
-
-	if (opt && opt->srcrt) {
-		struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt;
-		ipv6_addr_copy(&final_dst_buf, &fl->fl6_dst);
-		final_dst = &final_dst_buf;
-		ipv6_addr_copy(&fl->fl6_dst, rt0->addr);
-	}
-
-	if (!fl->oif && ipv6_addr_is_multicast(&fl->fl6_dst))
-		fl->oif = np->mcast_oif;
-
-	dst = __sk_dst_check(sk, np->dst_cookie);
-	if (dst) {
-		struct rt6_info *rt = (struct rt6_info*)dst;
-
-			/* Yes, checking route validity in not connected
-			   case is not very simple. Take into account,
-			   that we do not support routing by source, TOS,
-			   and MSG_DONTROUTE 		--ANK (980726)
-
-			   1. If route was host route, check that
-			      cached destination is current.
-			      If it is network route, we still may
-			      check its validity using saved pointer
-			      to the last used address: daddr_cache.
-			      We do not want to save whole address now,
-			      (because main consumer of this service
-			       is tcp, which has not this problem),
-			      so that the last trick works only on connected
-			      sockets.
-			   2. oif also should be the same.
-			 */
-
-		if (((rt->rt6i_dst.plen != 128 ||
-		      ipv6_addr_cmp(&fl->fl6_dst, &rt->rt6i_dst.addr))
-		     && (np->daddr_cache == NULL ||
-			 ipv6_addr_cmp(&fl->fl6_dst, np->daddr_cache)))
-		    || (fl->oif && fl->oif != dst->dev->ifindex)) {
-			dst = NULL;
-		} else
-			dst_hold(dst);
-	}
-
-	if (dst == NULL)
-		dst = ip6_route_output(sk, fl);
-
-	if (dst->error) {
-		IP6_INC_STATS(Ip6OutNoRoutes);
-		dst_release(dst);
-		return -ENETUNREACH;
-	}
-
-	if (ipv6_addr_any(&fl->fl6_src)) {
-		err = ipv6_get_saddr(dst, &fl->fl6_dst, &fl->fl6_src);
-
-		if (err) {
-#if IP6_DEBUG >= 2
-			printk(KERN_DEBUG "ip6_build_xmit: "
-			       "no available source address\n");
-#endif
-			goto out;
-		}
-	}
-	pktlength = length;
-
-        if (dst) {
-		if ((err = xfrm_lookup(&dst, fl, sk, 0)) < 0) {
-			dst_release(dst);	
-			return -ENETUNREACH;
-		}
-        }
-
-	if (hlimit < 0) {
-		if (ipv6_addr_is_multicast(&fl->fl6_dst))
-			hlimit = np->mcast_hops;
-		else
-			hlimit = np->hop_limit;
-		if (hlimit < 0)
-			hlimit = dst_metric(dst, RTAX_HOPLIMIT);
-	}
-
-	jumbolen = 0;
-
-	if (!inet->hdrincl) {
-		pktlength += sizeof(struct ipv6hdr);
-		if (opt)
-			pktlength += opt->opt_flen + opt->opt_nflen;
-
-		if (pktlength > sizeof(struct ipv6hdr) + IPV6_MAXPLEN) {
-			/* Jumbo datagram.
-			   It is assumed, that in the case of hdrincl
-			   jumbo option is supplied by user.
-			 */
-			pktlength += 8;
-			jumbolen = pktlength - sizeof(struct ipv6hdr);
-		}
-	}
-
-	mtu = dst_pmtu(dst);
-	if (np->frag_size < mtu) {
-		if (np->frag_size)
-			mtu = np->frag_size;
-		else if (np->pmtudisc == IPV6_PMTUDISC_DONT)
-			mtu = IPV6_MIN_MTU;
-	}
-
-	/* Critical arithmetic overflow check.
-	   FIXME: may gcc optimize it out? --ANK (980726)
-	 */
-	if (pktlength < length) {
-		ipv6_local_error(sk, EMSGSIZE, fl, mtu);
-		err = -EMSGSIZE;
-		goto out;
-	}
-
-	if (flags&MSG_CONFIRM)
-		dst_confirm(dst);
-
-	if (pktlength <= mtu) {
-		struct sk_buff *skb;
-		struct ipv6hdr *hdr;
-		struct net_device *dev = dst->dev;
-
-		err = 0;
-		if (flags&MSG_PROBE)
-			goto out;
-		/* alloc skb with mtu as we do in the IPv4 stack for IPsec */
-		skb = sock_alloc_send_skb(sk, mtu + LL_RESERVED_SPACE(dev),
-					  flags & MSG_DONTWAIT, &err);
-
-		if (skb == NULL) {
-			IP6_INC_STATS(Ip6OutDiscards);
-			goto out;
-		}
-
-		skb->dst = dst_clone(dst);
-
-		skb_reserve(skb, (dev->hard_header_len + 15) & ~15);
-
-		hdr = (struct ipv6hdr *) skb->tail;
-		skb->nh.ipv6h = hdr;
-
-		if (!inet->hdrincl) {
-			ip6_bld_1(sk, skb, fl, hlimit,
-				  jumbolen ? sizeof(struct ipv6hdr) : pktlength);
-
-			if (opt || jumbolen) {
-				u8 *prev_hdr = &hdr->nexthdr;
-				prev_hdr = ipv6_build_nfrag_opts(skb, prev_hdr, opt, final_dst, jumbolen);
-				if (opt && opt->opt_flen)
-					ipv6_build_frag_opts(skb, prev_hdr, opt);
-			}
-		}
-
-		skb_put(skb, length);
-		err = getfrag(data, &hdr->saddr,
-			      ((char *) hdr) + (pktlength - length),
-			      0, length);
-		if (!opt || !opt->dst1opt)
-			skb->h.raw = ((char *) hdr) + (pktlength - length);
-
-		if (!err) {
-			IP6_INC_STATS(Ip6OutRequests);
-			err = NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, dst->dev, ip6_maybe_reroute);
-		} else {
-			err = -EFAULT;
-			kfree_skb(skb);
-		}
-	} else {
-		if (inet->hdrincl || jumbolen ||
-		    np->pmtudisc == IPV6_PMTUDISC_DO) {
-			ipv6_local_error(sk, EMSGSIZE, fl, mtu);
-			err = -EMSGSIZE;
-			goto out;
-		}
-
-		err = ip6_frag_xmit(sk, getfrag, data, dst, fl, opt, final_dst, hlimit,
-				    flags, length, mtu);
-	}
-
-	/*
-	 *	cleanup
-	 */
-out:
-	ip6_dst_store(sk, dst,
-		      !ipv6_addr_cmp(&fl->fl6_dst, &np->daddr) ?
-		      &np->daddr : NULL);
-	if (err > 0)
-		err = np->recverr ? net_xmit_errno(err) : 0;
-	return err;
-}
-
 int ip6_call_ra_chain(struct sk_buff *skb, int sel)
 {
 	struct ip6_ra_chain *ra;