24 static int lowpan_nhc_insert(struct lowpan_nhc *nhc)  in lowpan_nhc_insert()  argument
34 		len_dif = nhc->idlen - this->idlen;  in lowpan_nhc_insert()
36 		if (nhc->idlen < this->idlen)  in lowpan_nhc_insert()
37 			len = nhc->idlen;  in lowpan_nhc_insert()
41 		result = memcmp(nhc->id, this->id, len);  in lowpan_nhc_insert()
55 	rb_link_node(&nhc->node, parent, new);  in lowpan_nhc_insert()
56 	rb_insert_color(&nhc->node, &rb_root);  in lowpan_nhc_insert()
61 static void lowpan_nhc_remove(struct lowpan_nhc *nhc)  in lowpan_nhc_remove()  argument
63 	rb_erase(&nhc->node, &rb_root);  in lowpan_nhc_remove()
72 		struct lowpan_nhc *nhc = container_of(node, struct lowpan_nhc,  in lowpan_nhc_by_nhcid()  local
77 		if (nhcid_skb_ptr + nhc->idlen > skb->data + skb->len)  in lowpan_nhc_by_nhcid()
81 		memcpy(nhcid_skb_ptr_masked, nhcid_skb_ptr, nhc->idlen);  in lowpan_nhc_by_nhcid()
82 		for (i = 0; i < nhc->idlen; i++)  in lowpan_nhc_by_nhcid()
83 			nhcid_skb_ptr_masked[i] &= nhc->idmask[i];  in lowpan_nhc_by_nhcid()
85 		result = memcmp(nhcid_skb_ptr_masked, nhc->id, nhc->idlen);  in lowpan_nhc_by_nhcid()
91 			return nhc;  in lowpan_nhc_by_nhcid()
100 	struct lowpan_nhc *nhc;  in lowpan_nhc_check_compression()  local
105 	nhc = lowpan_nexthdr_nhcs[hdr->nexthdr];  in lowpan_nhc_check_compression()
106 	if (!(nhc && nhc->compress))  in lowpan_nhc_check_compression()
118 	struct lowpan_nhc *nhc;  in lowpan_nhc_do_compression()  local
122 	nhc = lowpan_nexthdr_nhcs[hdr->nexthdr];  in lowpan_nhc_do_compression()
133 	if (unlikely(!nhc || !nhc->compress)) {  in lowpan_nhc_do_compression()
144 	ret = nhc->compress(skb, hc_ptr);  in lowpan_nhc_do_compression()
149 	skb_pull(skb, nhc->nexthdrlen);  in lowpan_nhc_do_compression()
161 	struct lowpan_nhc *nhc;  in lowpan_nhc_do_uncompression()  local
166 	nhc = lowpan_nhc_by_nhcid(skb);  in lowpan_nhc_do_uncompression()
167 	if (nhc) {  in lowpan_nhc_do_uncompression()
168 		if (nhc->uncompress) {  in lowpan_nhc_do_uncompression()
169 			ret = nhc->uncompress(skb, sizeof(struct ipv6hdr) +  in lowpan_nhc_do_uncompression()
170 					      nhc->nexthdrlen);  in lowpan_nhc_do_uncompression()
178 				    nhc->name);  in lowpan_nhc_do_uncompression()
187 	hdr->nexthdr = nhc->nexthdr;  in lowpan_nhc_do_uncompression()
190 		       skb_transport_header(skb), nhc->nexthdrlen);  in lowpan_nhc_do_uncompression()
197 int lowpan_nhc_add(struct lowpan_nhc *nhc)  in lowpan_nhc_add()  argument
201 	if (!nhc->idlen || !nhc->idsetup)  in lowpan_nhc_add()
204 	WARN_ONCE(nhc->idlen > LOWPAN_NHC_MAX_ID_LEN,  in lowpan_nhc_add()
206 		  nhc->idlen);  in lowpan_nhc_add()
208 	nhc->idsetup(nhc);  in lowpan_nhc_add()
212 	if (lowpan_nexthdr_nhcs[nhc->nexthdr]) {  in lowpan_nhc_add()
217 	ret = lowpan_nhc_insert(nhc);  in lowpan_nhc_add()
221 	lowpan_nexthdr_nhcs[nhc->nexthdr] = nhc;  in lowpan_nhc_add()
228 void lowpan_nhc_del(struct lowpan_nhc *nhc)  in lowpan_nhc_del()  argument
232 	lowpan_nhc_remove(nhc);  in lowpan_nhc_del()
233 	lowpan_nexthdr_nhcs[nhc->nexthdr] = NULL;  in lowpan_nhc_del()