251 	if (ip->version != 4 || ip->ihl < 5)  in slhc_compress()
263 	nlen = ip->ihl * 4;  in slhc_compress()
353 	if(ip->version != cs->cs_ip.version || ip->ihl != cs->cs_ip.ihl  in slhc_compress()
358 	 || (ip->ihl > 5 && memcmp(ip+1,cs->cs_ipopt,((ip->ihl)-5)*4) != 0)  in slhc_compress()
478 	if (ip->ihl > 5)  in slhc_compress()
479 	  memcpy(cs->cs_ipopt, ip+1, ((ip->ihl) - 5) * 4);  in slhc_compress()
547 	hdrlen = ip->ihl * 4 + thp->doff * 4;  in slhc_uncompress()
620 	if (ip->ihl > 5) {  in slhc_uncompress()
621 	  memcpy(cp, cs->cs_ipopt, (ip->ihl - 5) * 4);  in slhc_uncompress()
622 	  cp += (ip->ihl - 5) * 4;  in slhc_uncompress()
625 	put_unaligned(ip_fast_csum(icp, ip->ihl),  in slhc_uncompress()
647 	unsigned ihl;  in slhc_remember()  local
657 	ihl = icp[0] & 0xf;  in slhc_remember()
658 	if(ihl < 20 / 4){  in slhc_remember()
666 	if (ip_fast_csum(icp, ihl)) {  in slhc_remember()
680 	memcpy(&cs->cs_tcp,icp + ihl*4,20);  in slhc_remember()
681 	if (ihl > 5)  in slhc_remember()
682 	  memcpy(cs->cs_ipopt, icp + sizeof(struct iphdr), (ihl - 5) * 4);  in slhc_remember()
684 	  memcpy(cs->cs_tcpopt, icp + ihl*4 + sizeof(struct tcphdr), (cs->cs_tcp.doff - 5) * 4);  in slhc_remember()
685 	cs->cs_hsize = ihl*2 + cs->cs_tcp.doff*2;  in slhc_remember()