19 static int lowpan_nhc_insert(struct lowpan_nhc *nhc)  in lowpan_nhc_insert()  argument
29 		len_dif = nhc->idlen - this->idlen;  in lowpan_nhc_insert()
31 		if (nhc->idlen < this->idlen)  in lowpan_nhc_insert()
32 			len = nhc->idlen;  in lowpan_nhc_insert()
36 		result = memcmp(nhc->id, this->id, len);  in lowpan_nhc_insert()
50 	rb_link_node(&nhc->node, parent, new);  in lowpan_nhc_insert()
51 	rb_insert_color(&nhc->node, &rb_root);  in lowpan_nhc_insert()
56 static void lowpan_nhc_remove(struct lowpan_nhc *nhc)  in lowpan_nhc_remove()  argument
58 	rb_erase(&nhc->node, &rb_root);  in lowpan_nhc_remove()
67 		struct lowpan_nhc *nhc = rb_entry(node, struct lowpan_nhc,  in lowpan_nhc_by_nhcid()  local
72 		if (nhcid_skb_ptr + nhc->idlen > skb->data + skb->len)  in lowpan_nhc_by_nhcid()
76 		memcpy(nhcid_skb_ptr_masked, nhcid_skb_ptr, nhc->idlen);  in lowpan_nhc_by_nhcid()
77 		for (i = 0; i < nhc->idlen; i++)  in lowpan_nhc_by_nhcid()
78 			nhcid_skb_ptr_masked[i] &= nhc->idmask[i];  in lowpan_nhc_by_nhcid()
80 		result = memcmp(nhcid_skb_ptr_masked, nhc->id, nhc->idlen);  in lowpan_nhc_by_nhcid()
86 			return nhc;  in lowpan_nhc_by_nhcid()
95 	struct lowpan_nhc *nhc;  in lowpan_nhc_check_compression()  local
100 	nhc = lowpan_nexthdr_nhcs[hdr->nexthdr];  in lowpan_nhc_check_compression()
101 	if (!(nhc && nhc->compress))  in lowpan_nhc_check_compression()
113 	struct lowpan_nhc *nhc;  in lowpan_nhc_do_compression()  local
117 	nhc = lowpan_nexthdr_nhcs[hdr->nexthdr];  in lowpan_nhc_do_compression()
128 	if (unlikely(!nhc || !nhc->compress)) {  in lowpan_nhc_do_compression()
139 	ret = nhc->compress(skb, hc_ptr);  in lowpan_nhc_do_compression()
144 	skb_pull(skb, nhc->nexthdrlen);  in lowpan_nhc_do_compression()
156 	struct lowpan_nhc *nhc;  in lowpan_nhc_do_uncompression()  local
161 	nhc = lowpan_nhc_by_nhcid(skb);  in lowpan_nhc_do_uncompression()
162 	if (nhc) {  in lowpan_nhc_do_uncompression()
163 		if (nhc->uncompress) {  in lowpan_nhc_do_uncompression()
164 			ret = nhc->uncompress(skb, sizeof(struct ipv6hdr) +  in lowpan_nhc_do_uncompression()
165 					      nhc->nexthdrlen);  in lowpan_nhc_do_uncompression()
173 				    nhc->name);  in lowpan_nhc_do_uncompression()
182 	hdr->nexthdr = nhc->nexthdr;  in lowpan_nhc_do_uncompression()
185 		       skb_transport_header(skb), nhc->nexthdrlen);  in lowpan_nhc_do_uncompression()
192 int lowpan_nhc_add(struct lowpan_nhc *nhc)  in lowpan_nhc_add()  argument
196 	if (!nhc->idlen || !nhc->idsetup)  in lowpan_nhc_add()
199 	WARN_ONCE(nhc->idlen > LOWPAN_NHC_MAX_ID_LEN,  in lowpan_nhc_add()
201 		  nhc->idlen);  in lowpan_nhc_add()
203 	nhc->idsetup(nhc);  in lowpan_nhc_add()
207 	if (lowpan_nexthdr_nhcs[nhc->nexthdr]) {  in lowpan_nhc_add()
212 	ret = lowpan_nhc_insert(nhc);  in lowpan_nhc_add()
216 	lowpan_nexthdr_nhcs[nhc->nexthdr] = nhc;  in lowpan_nhc_add()
223 void lowpan_nhc_del(struct lowpan_nhc *nhc)  in lowpan_nhc_del()  argument
227 	lowpan_nhc_remove(nhc);  in lowpan_nhc_del()
228 	lowpan_nexthdr_nhcs[nhc->nexthdr] = NULL;  in lowpan_nhc_del()