slip: Move the SLIP drivers

Move the Serial Line Internet Protocol (SLIP) drivers into
drivers/net/slip/ and make the necessary Kconfig and Makefile
changes.

Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Acked-by: Alan Cox <alan@linux.intel.com>

1 files changed, 0 insertions, 742 deletions

diff --git a/drivers/net/slhc.c b/drivers/net/slhc.c
deleted file mode 100644
index 0a0a6643cf3..00000000000
--- a/drivers/net/slhc.c
+++ /dev/null
@@ -1,742 +0,0 @@
-/*
- * Routines to compress and uncompress tcp packets (for transmission
- * over low speed serial lines).
- *
- * Copyright (c) 1989 Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms are permitted
- * provided that the above copyright notice and this paragraph are
- * duplicated in all such forms and that any documentation,
- * advertising materials, and other materials related to such
- * distribution and use acknowledge that the software was developed
- * by the University of California, Berkeley.  The name of the
- * University may not be used to endorse or promote products derived
- * from this software without specific prior written permission.
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
- *
- *	Van Jacobson (van@helios.ee.lbl.gov), Dec 31, 1989:
- *	- Initial distribution.
- *
- *
- * modified for KA9Q Internet Software Package by
- * Katie Stevens (dkstevens@ucdavis.edu)
- * University of California, Davis
- * Computing Services
- *	- 01-31-90	initial adaptation (from 1.19)
- *	PPP.05	02-15-90 [ks]
- *	PPP.08	05-02-90 [ks]	use PPP protocol field to signal compression
- *	PPP.15	09-90	 [ks]	improve mbuf handling
- *	PPP.16	11-02	 [karn]	substantially rewritten to use NOS facilities
- *
- *	- Feb 1991	Bill_Simpson@um.cc.umich.edu
- *			variable number of conversation slots
- *			allow zero or one slots
- *			separate routines
- *			status display
- *	- Jul 1994	Dmitry Gorodchanin
- *			Fixes for memory leaks.
- *      - Oct 1994      Dmitry Gorodchanin
- *                      Modularization.
- *	- Jan 1995	Bjorn Ekwall
- *			Use ip_fast_csum from ip.h
- *	- July 1995	Christos A. Polyzols
- *			Spotted bug in tcp option checking
- *
- *
- *	This module is a difficult issue. It's clearly inet code but it's also clearly
- *	driver code belonging close to PPP and SLIP
- */
-
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/types.h>
-#include <linux/string.h>
-#include <linux/errno.h>
-#include <linux/kernel.h>
-#include <net/slhc_vj.h>
-
-#ifdef CONFIG_INET
-/* Entire module is for IP only */
-#include <linux/mm.h>
-#include <linux/socket.h>
-#include <linux/sockios.h>
-#include <linux/termios.h>
-#include <linux/in.h>
-#include <linux/fcntl.h>
-#include <linux/inet.h>
-#include <linux/netdevice.h>
-#include <net/ip.h>
-#include <net/protocol.h>
-#include <net/icmp.h>
-#include <net/tcp.h>
-#include <linux/skbuff.h>
-#include <net/sock.h>
-#include <linux/timer.h>
-#include <asm/system.h>
-#include <asm/uaccess.h>
-#include <net/checksum.h>
-#include <asm/unaligned.h>
-
-static unsigned char *encode(unsigned char *cp, unsigned short n);
-static long decode(unsigned char **cpp);
-static unsigned char * put16(unsigned char *cp, unsigned short x);
-static unsigned short pull16(unsigned char **cpp);
-
-/* Initialize compression data structure
- *	slots must be in range 0 to 255 (zero meaning no compression)
- */
-struct slcompress *
-slhc_init(int rslots, int tslots)
-{
-	register short i;
-	register struct cstate *ts;
-	struct slcompress *comp;
-
-	comp = kzalloc(sizeof(struct slcompress), GFP_KERNEL);
-	if (! comp)
-		goto out_fail;
-
-	if ( rslots > 0  &&  rslots < 256 ) {
-		size_t rsize = rslots * sizeof(struct cstate);
-		comp->rstate = kzalloc(rsize, GFP_KERNEL);
-		if (! comp->rstate)
-			goto out_free;
-		comp->rslot_limit = rslots - 1;
-	}
-
-	if ( tslots > 0  &&  tslots < 256 ) {
-		size_t tsize = tslots * sizeof(struct cstate);
-		comp->tstate = kzalloc(tsize, GFP_KERNEL);
-		if (! comp->tstate)
-			goto out_free2;
-		comp->tslot_limit = tslots - 1;
-	}
-
-	comp->xmit_oldest = 0;
-	comp->xmit_current = 255;
-	comp->recv_current = 255;
-	/*
-	 * don't accept any packets with implicit index until we get
-	 * one with an explicit index.  Otherwise the uncompress code
-	 * will try to use connection 255, which is almost certainly
-	 * out of range
-	 */
-	comp->flags |= SLF_TOSS;
-
-	if ( tslots > 0 ) {
-		ts = comp->tstate;
-		for(i = comp->tslot_limit; i > 0; --i){
-			ts[i].cs_this = i;
-			ts[i].next = &(ts[i - 1]);
-		}
-		ts[0].next = &(ts[comp->tslot_limit]);
-		ts[0].cs_this = 0;
-	}
-	return comp;
-
-out_free2:
-	kfree(comp->rstate);
-out_free:
-	kfree(comp);
-out_fail:
-	return NULL;
-}
-
-
-/* Free a compression data structure */
-void
-slhc_free(struct slcompress *comp)
-{
-	if ( comp == NULLSLCOMPR )
-		return;
-
-	if ( comp->tstate != NULLSLSTATE )
-		kfree( comp->tstate );
-
-	if ( comp->rstate != NULLSLSTATE )
-		kfree( comp->rstate );
-
-	kfree( comp );
-}
-
-
-/* Put a short in host order into a char array in network order */
-static inline unsigned char *
-put16(unsigned char *cp, unsigned short x)
-{
-	*cp++ = x >> 8;
-	*cp++ = x;
-
-	return cp;
-}
-
-
-/* Encode a number */
-static unsigned char *
-encode(unsigned char *cp, unsigned short n)
-{
-	if(n >= 256 || n == 0){
-		*cp++ = 0;
-		cp = put16(cp,n);
-	} else {
-		*cp++ = n;
-	}
-	return cp;
-}
-
-/* Pull a 16-bit integer in host order from buffer in network byte order */
-static unsigned short
-pull16(unsigned char **cpp)
-{
-	short rval;
-
-	rval = *(*cpp)++;
-	rval <<= 8;
-	rval |= *(*cpp)++;
-	return rval;
-}
-
-/* Decode a number */
-static long
-decode(unsigned char **cpp)
-{
-	register int x;
-
-	x = *(*cpp)++;
-	if(x == 0){
-		return pull16(cpp) & 0xffff;	/* pull16 returns -1 on error */
-	} else {
-		return x & 0xff;		/* -1 if PULLCHAR returned error */
-	}
-}
-
-/*
- * icp and isize are the original packet.
- * ocp is a place to put a copy if necessary.
- * cpp is initially a pointer to icp.  If the copy is used,
- *    change it to ocp.
- */
-
-int
-slhc_compress(struct slcompress *comp, unsigned char *icp, int isize,
-	unsigned char *ocp, unsigned char **cpp, int compress_cid)
-{
-	register struct cstate *ocs = &(comp->tstate[comp->xmit_oldest]);
-	register struct cstate *lcs = ocs;
-	register struct cstate *cs = lcs->next;
-	register unsigned long deltaS, deltaA;
-	register short changes = 0;
-	int hlen;
-	unsigned char new_seq[16];
-	register unsigned char *cp = new_seq;
-	struct iphdr *ip;
-	struct tcphdr *th, *oth;
-	__sum16 csum;
-
-
-	/*
-	 *	Don't play with runt packets.
-	 */
-
-	if(isize<sizeof(struct iphdr))
-		return isize;
-
-	ip = (struct iphdr *) icp;
-
-	/* Bail if this packet isn't TCP, or is an IP fragment */
-	if (ip->protocol != IPPROTO_TCP || (ntohs(ip->frag_off) & 0x3fff)) {
-		/* Send as regular IP */
-		if(ip->protocol != IPPROTO_TCP)
-			comp->sls_o_nontcp++;
-		else
-			comp->sls_o_tcp++;
-		return isize;
-	}
-	/* Extract TCP header */
-
-	th = (struct tcphdr *)(((unsigned char *)ip) + ip->ihl*4);
-	hlen = ip->ihl*4 + th->doff*4;
-
-	/*  Bail if the TCP packet isn't `compressible' (i.e., ACK isn't set or
-	 *  some other control bit is set). Also uncompressible if
-	 *  it's a runt.
-	 */
-	if(hlen > isize || th->syn || th->fin || th->rst ||
-	    ! (th->ack)){
-		/* TCP connection stuff; send as regular IP */
-		comp->sls_o_tcp++;
-		return isize;
-	}
-	/*
-	 * Packet is compressible -- we're going to send either a
-	 * COMPRESSED_TCP or UNCOMPRESSED_TCP packet.  Either way,
-	 * we need to locate (or create) the connection state.
-	 *
-	 * States are kept in a circularly linked list with
-	 * xmit_oldest pointing to the end of the list.  The
-	 * list is kept in lru order by moving a state to the
-	 * head of the list whenever it is referenced.  Since
-	 * the list is short and, empirically, the connection
-	 * we want is almost always near the front, we locate
-	 * states via linear search.  If we don't find a state
-	 * for the datagram, the oldest state is (re-)used.
-	 */
-	for ( ; ; ) {
-		if( ip->saddr == cs->cs_ip.saddr
-		 && ip->daddr == cs->cs_ip.daddr
-		 && th->source == cs->cs_tcp.source
-		 && th->dest == cs->cs_tcp.dest)
-			goto found;
-
-		/* if current equal oldest, at end of list */
-		if ( cs == ocs )
-			break;
-		lcs = cs;
-		cs = cs->next;
-		comp->sls_o_searches++;
-	}
-	/*
-	 * Didn't find it -- re-use oldest cstate.  Send an
-	 * uncompressed packet that tells the other side what
-	 * connection number we're using for this conversation.
-	 *
-	 * Note that since the state list is circular, the oldest
-	 * state points to the newest and we only need to set
-	 * xmit_oldest to update the lru linkage.
-	 */
-	comp->sls_o_misses++;
-	comp->xmit_oldest = lcs->cs_this;
-	goto uncompressed;
-
-found:
-	/*
-	 * Found it -- move to the front on the connection list.
-	 */
-	if(lcs == ocs) {
- 		/* found at most recently used */
-	} else if (cs == ocs) {
-		/* found at least recently used */
-		comp->xmit_oldest = lcs->cs_this;
-	} else {
-		/* more than 2 elements */
-		lcs->next = cs->next;
-		cs->next = ocs->next;
-		ocs->next = cs;
-	}
-
-	/*
-	 * Make sure that only what we expect to change changed.
-	 * Check the following:
-	 * IP protocol version, header length & type of service.
-	 * The "Don't fragment" bit.
-	 * The time-to-live field.
-	 * The TCP header length.
-	 * IP options, if any.
-	 * TCP options, if any.
-	 * If any of these things are different between the previous &
-	 * current datagram, we send the current datagram `uncompressed'.
-	 */
-	oth = &cs->cs_tcp;
-
-	if(ip->version != cs->cs_ip.version || ip->ihl != cs->cs_ip.ihl
-	 || ip->tos != cs->cs_ip.tos
-	 || (ip->frag_off & htons(0x4000)) != (cs->cs_ip.frag_off & htons(0x4000))
-	 || ip->ttl != cs->cs_ip.ttl
-	 || th->doff != cs->cs_tcp.doff
-	 || (ip->ihl > 5 && memcmp(ip+1,cs->cs_ipopt,((ip->ihl)-5)*4) != 0)
-	 || (th->doff > 5 && memcmp(th+1,cs->cs_tcpopt,((th->doff)-5)*4) != 0)){
-		goto uncompressed;
-	}
-
-	/*
-	 * Figure out which of the changing fields changed.  The
-	 * receiver expects changes in the order: urgent, window,
-	 * ack, seq (the order minimizes the number of temporaries
-	 * needed in this section of code).
-	 */
-	if(th->urg){
-		deltaS = ntohs(th->urg_ptr);
-		cp = encode(cp,deltaS);
-		changes |= NEW_U;
-	} else if(th->urg_ptr != oth->urg_ptr){
-		/* argh! URG not set but urp changed -- a sensible
-		 * implementation should never do this but RFC793
-		 * doesn't prohibit the change so we have to deal
-		 * with it. */
-		goto uncompressed;
-	}
-	if((deltaS = ntohs(th->window) - ntohs(oth->window)) != 0){
-		cp = encode(cp,deltaS);
-		changes |= NEW_W;
-	}
-	if((deltaA = ntohl(th->ack_seq) - ntohl(oth->ack_seq)) != 0L){
-		if(deltaA > 0x0000ffff)
-			goto uncompressed;
-		cp = encode(cp,deltaA);
-		changes |= NEW_A;
-	}
-	if((deltaS = ntohl(th->seq) - ntohl(oth->seq)) != 0L){
-		if(deltaS > 0x0000ffff)
-			goto uncompressed;
-		cp = encode(cp,deltaS);
-		changes |= NEW_S;
-	}
-
-	switch(changes){
-	case 0:	/* Nothing changed. If this packet contains data and the
-		 * last one didn't, this is probably a data packet following
-		 * an ack (normal on an interactive connection) and we send
-		 * it compressed.  Otherwise it's probably a retransmit,
-		 * retransmitted ack or window probe.  Send it uncompressed
-		 * in case the other side missed the compressed version.
-		 */
-		if(ip->tot_len != cs->cs_ip.tot_len &&
-		   ntohs(cs->cs_ip.tot_len) == hlen)
-			break;
-		goto uncompressed;
-		break;
-	case SPECIAL_I:
-	case SPECIAL_D:
-		/* actual changes match one of our special case encodings --
-		 * send packet uncompressed.
-		 */
-		goto uncompressed;
-	case NEW_S|NEW_A:
-		if(deltaS == deltaA &&
-		    deltaS == ntohs(cs->cs_ip.tot_len) - hlen){
-			/* special case for echoed terminal traffic */
-			changes = SPECIAL_I;
-			cp = new_seq;
-		}
-		break;
-	case NEW_S:
-		if(deltaS == ntohs(cs->cs_ip.tot_len) - hlen){
-			/* special case for data xfer */
-			changes = SPECIAL_D;
-			cp = new_seq;
-		}
-		break;
-	}
-	deltaS = ntohs(ip->id) - ntohs(cs->cs_ip.id);
-	if(deltaS != 1){
-		cp = encode(cp,deltaS);
-		changes |= NEW_I;
-	}
-	if(th->psh)
-		changes |= TCP_PUSH_BIT;
-	/* Grab the cksum before we overwrite it below.  Then update our
-	 * state with this packet's header.
-	 */
-	csum = th->check;
-	memcpy(&cs->cs_ip,ip,20);
-	memcpy(&cs->cs_tcp,th,20);
-	/* We want to use the original packet as our compressed packet.
-	 * (cp - new_seq) is the number of bytes we need for compressed
-	 * sequence numbers.  In addition we need one byte for the change
-	 * mask, one for the connection id and two for the tcp checksum.
-	 * So, (cp - new_seq) + 4 bytes of header are needed.
-	 */
-	deltaS = cp - new_seq;
-	if(compress_cid == 0 || comp->xmit_current != cs->cs_this){
-		cp = ocp;
-		*cpp = ocp;
-		*cp++ = changes | NEW_C;
-		*cp++ = cs->cs_this;
-		comp->xmit_current = cs->cs_this;
-	} else {
-		cp = ocp;
-		*cpp = ocp;
-		*cp++ = changes;
-	}
-	*(__sum16 *)cp = csum;
-	cp += 2;
-/* deltaS is now the size of the change section of the compressed header */
-	memcpy(cp,new_seq,deltaS);	/* Write list of deltas */
-	memcpy(cp+deltaS,icp+hlen,isize-hlen);
-	comp->sls_o_compressed++;
-	ocp[0] |= SL_TYPE_COMPRESSED_TCP;
-	return isize - hlen + deltaS + (cp - ocp);
-
-	/* Update connection state cs & send uncompressed packet (i.e.,
-	 * a regular ip/tcp packet but with the 'conversation id' we hope
-	 * to use on future compressed packets in the protocol field).
-	 */
-uncompressed:
-	memcpy(&cs->cs_ip,ip,20);
-	memcpy(&cs->cs_tcp,th,20);
-	if (ip->ihl > 5)
-	  memcpy(cs->cs_ipopt, ip+1, ((ip->ihl) - 5) * 4);
-	if (th->doff > 5)
-	  memcpy(cs->cs_tcpopt, th+1, ((th->doff) - 5) * 4);
-	comp->xmit_current = cs->cs_this;
-	comp->sls_o_uncompressed++;
-	memcpy(ocp, icp, isize);
-	*cpp = ocp;
-	ocp[9] = cs->cs_this;
-	ocp[0] |= SL_TYPE_UNCOMPRESSED_TCP;
-	return isize;
-}
-
-
-int
-slhc_uncompress(struct slcompress *comp, unsigned char *icp, int isize)
-{
-	register int changes;
-	long x;
-	register struct tcphdr *thp;
-	register struct iphdr *ip;
-	register struct cstate *cs;
-	int len, hdrlen;
-	unsigned char *cp = icp;
-
-	/* We've got a compressed packet; read the change byte */
-	comp->sls_i_compressed++;
-	if(isize < 3){
-		comp->sls_i_error++;
-		return 0;
-	}
-	changes = *cp++;
-	if(changes & NEW_C){
-		/* Make sure the state index is in range, then grab the state.
-		 * If we have a good state index, clear the 'discard' flag.
-		 */
-		x = *cp++;	/* Read conn index */
-		if(x < 0 || x > comp->rslot_limit)
-			goto bad;
-
-		comp->flags &=~ SLF_TOSS;
-		comp->recv_current = x;
-	} else {
-		/* this packet has an implicit state index.  If we've
-		 * had a line error since the last time we got an
-		 * explicit state index, we have to toss the packet. */
-		if(comp->flags & SLF_TOSS){
-			comp->sls_i_tossed++;
-			return 0;
-		}
-	}
-	cs = &comp->rstate[comp->recv_current];
-	thp = &cs->cs_tcp;
-	ip = &cs->cs_ip;
-
-	thp->check = *(__sum16 *)cp;
-	cp += 2;
-
-	thp->psh = (changes & TCP_PUSH_BIT) ? 1 : 0;
-/*
- * we can use the same number for the length of the saved header and
- * the current one, because the packet wouldn't have been sent
- * as compressed unless the options were the same as the previous one
- */
-
-	hdrlen = ip->ihl * 4 + thp->doff * 4;
-
-	switch(changes & SPECIALS_MASK){
-	case SPECIAL_I:		/* Echoed terminal traffic */
-		{
-		register short i;
-		i = ntohs(ip->tot_len) - hdrlen;
-		thp->ack_seq = htonl( ntohl(thp->ack_seq) + i);
-		thp->seq = htonl( ntohl(thp->seq) + i);
-		}
-		break;
-
-	case SPECIAL_D:			/* Unidirectional data */
-		thp->seq = htonl( ntohl(thp->seq) +
-				  ntohs(ip->tot_len) - hdrlen);
-		break;
-
-	default:
-		if(changes & NEW_U){
-			thp->urg = 1;
-			if((x = decode(&cp)) == -1) {
-				goto bad;
-			}
-			thp->urg_ptr = htons(x);
-		} else
-			thp->urg = 0;
-		if(changes & NEW_W){
-			if((x = decode(&cp)) == -1) {
-				goto bad;
-			}
-			thp->window = htons( ntohs(thp->window) + x);
-		}
-		if(changes & NEW_A){
-			if((x = decode(&cp)) == -1) {
-				goto bad;
-			}
-			thp->ack_seq = htonl( ntohl(thp->ack_seq) + x);
-		}
-		if(changes & NEW_S){
-			if((x = decode(&cp)) == -1) {
-				goto bad;
-			}
-			thp->seq = htonl( ntohl(thp->seq) + x);
-		}
-		break;
-	}
-	if(changes & NEW_I){
-		if((x = decode(&cp)) == -1) {
-			goto bad;
-		}
-		ip->id = htons (ntohs (ip->id) + x);
-	} else
-		ip->id = htons (ntohs (ip->id) + 1);
-
-	/*
-	 * At this point, cp points to the first byte of data in the
-	 * packet.  Put the reconstructed TCP and IP headers back on the
-	 * packet.  Recalculate IP checksum (but not TCP checksum).
-	 */
-
-	len = isize - (cp - icp);
-	if (len < 0)
-		goto bad;
-	len += hdrlen;
-	ip->tot_len = htons(len);
-	ip->check = 0;
-
-	memmove(icp + hdrlen, cp, len - hdrlen);
-
-	cp = icp;
-	memcpy(cp, ip, 20);
-	cp += 20;
-
-	if (ip->ihl > 5) {
-	  memcpy(cp, cs->cs_ipopt, (ip->ihl - 5) * 4);
-	  cp += (ip->ihl - 5) * 4;
-	}
-
-	put_unaligned(ip_fast_csum(icp, ip->ihl),
-		      &((struct iphdr *)icp)->check);
-
-	memcpy(cp, thp, 20);
-	cp += 20;
-
-	if (thp->doff > 5) {
-	  memcpy(cp, cs->cs_tcpopt, ((thp->doff) - 5) * 4);
-	  cp += ((thp->doff) - 5) * 4;
-	}
-
-	return len;
-bad:
-	comp->sls_i_error++;
-	return slhc_toss( comp );
-}
-
-
-int
-slhc_remember(struct slcompress *comp, unsigned char *icp, int isize)
-{
-	register struct cstate *cs;
-	unsigned ihl;
-
-	unsigned char index;
-
-	if(isize < 20) {
-		/* The packet is shorter than a legal IP header */
-		comp->sls_i_runt++;
-		return slhc_toss( comp );
-	}
-	/* Peek at the IP header's IHL field to find its length */
-	ihl = icp[0] & 0xf;
-	if(ihl < 20 / 4){
-		/* The IP header length field is too small */
-		comp->sls_i_runt++;
-		return slhc_toss( comp );
-	}
-	index = icp[9];
-	icp[9] = IPPROTO_TCP;
-
-	if (ip_fast_csum(icp, ihl)) {
-		/* Bad IP header checksum; discard */
-		comp->sls_i_badcheck++;
-		return slhc_toss( comp );
-	}
-	if(index > comp->rslot_limit) {
-		comp->sls_i_error++;
-		return slhc_toss(comp);
-	}
-
-	/* Update local state */
-	cs = &comp->rstate[comp->recv_current = index];
-	comp->flags &=~ SLF_TOSS;
-	memcpy(&cs->cs_ip,icp,20);
-	memcpy(&cs->cs_tcp,icp + ihl*4,20);
-	if (ihl > 5)
-	  memcpy(cs->cs_ipopt, icp + sizeof(struct iphdr), (ihl - 5) * 4);
-	if (cs->cs_tcp.doff > 5)
-	  memcpy(cs->cs_tcpopt, icp + ihl*4 + sizeof(struct tcphdr), (cs->cs_tcp.doff - 5) * 4);
-	cs->cs_hsize = ihl*2 + cs->cs_tcp.doff*2;
-	/* Put headers back on packet
-	 * Neither header checksum is recalculated
-	 */
-	comp->sls_i_uncompressed++;
-	return isize;
-}
-
-int
-slhc_toss(struct slcompress *comp)
-{
-	if ( comp == NULLSLCOMPR )
-		return 0;
-
-	comp->flags |= SLF_TOSS;
-	return 0;
-}
-
-#else /* CONFIG_INET */
-
-int
-slhc_toss(struct slcompress *comp)
-{
-  printk(KERN_DEBUG "Called IP function on non IP-system: slhc_toss");
-  return -EINVAL;
-}
-int
-slhc_uncompress(struct slcompress *comp, unsigned char *icp, int isize)
-{
-  printk(KERN_DEBUG "Called IP function on non IP-system: slhc_uncompress");
-  return -EINVAL;
-}
-int
-slhc_compress(struct slcompress *comp, unsigned char *icp, int isize,
-	unsigned char *ocp, unsigned char **cpp, int compress_cid)
-{
-  printk(KERN_DEBUG "Called IP function on non IP-system: slhc_compress");
-  return -EINVAL;
-}
-
-int
-slhc_remember(struct slcompress *comp, unsigned char *icp, int isize)
-{
-  printk(KERN_DEBUG "Called IP function on non IP-system: slhc_remember");
-  return -EINVAL;
-}
-
-void
-slhc_free(struct slcompress *comp)
-{
-  printk(KERN_DEBUG "Called IP function on non IP-system: slhc_free");
-}
-struct slcompress *
-slhc_init(int rslots, int tslots)
-{
-  printk(KERN_DEBUG "Called IP function on non IP-system: slhc_init");
-  return NULL;
-}
-
-#endif /* CONFIG_INET */
-
-/* VJ header compression */
-EXPORT_SYMBOL(slhc_init);
-EXPORT_SYMBOL(slhc_free);
-EXPORT_SYMBOL(slhc_remember);
-EXPORT_SYMBOL(slhc_compress);
-EXPORT_SYMBOL(slhc_uncompress);
-EXPORT_SYMBOL(slhc_toss);
-
-MODULE_LICENSE("Dual BSD/GPL");