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Commit abbee2effcbce55440accb0a1dd315562875efa2

Authored by alex.bluesman.smirnov@gmail.com
Committed by David S. Miller
1 parent 428840424f
Exists in smarc-l5.0.0_1.0.0-ga and in 5 other branches imx_3.10.17_1.0.1_ga, imx_3.10.53_1.1.0_ga, imx_3.14.28_1.0.0_ga, smarc-imx_3.10.53_1.1.0_ga, smarc-imx_3.14.28_1.0.0_ga

6lowpan: fix tag variable size 

Function lowpan_alloc_new_frame() takes u8 tag as an argument. However,
its only caller, lowpan_process_data() passes down a u16. Hence,
the tag value can get corrupted. This prevent 6lowpan fragment reassembly of a
message when the fragment tag value is over 256.

Signed-off-by: Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
Cc: Tony Cheneau <tony.cheneau@amnesiak.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Showing 1 changed file with 1 additions and 1 deletions Inline Diff

net/ieee802154/6lowpan.c
Diff comments   View file @ abbee2e
1 /* 1 /*
2 * Copyright 2011, Siemens AG 2 * Copyright 2011, Siemens AG
3 * written by Alexander Smirnov <alex.bluesman.smirnov@gmail.com> 3 * written by Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
4 */ 4 */
5 5
6 /* 6 /*
7 * Based on patches from Jon Smirl <jonsmirl@gmail.com> 7 * Based on patches from Jon Smirl <jonsmirl@gmail.com>
8 * Copyright (c) 2011 Jon Smirl <jonsmirl@gmail.com> 8 * Copyright (c) 2011 Jon Smirl <jonsmirl@gmail.com>
9 * 9 *
10 * This program is free software; you can redistribute it and/or modify 10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 11 * it under the terms of the GNU General Public License version 2
12 * as published by the Free Software Foundation. 12 * as published by the Free Software Foundation.
13 * 13 *
14 * This program is distributed in the hope that it will be useful, 14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details. 17 * GNU General Public License for more details.
18 * 18 *
19 * You should have received a copy of the GNU General Public License along 19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, write to the Free Software Foundation, Inc., 20 * with this program; if not, write to the Free Software Foundation, Inc.,
21 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 21 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
22 */ 22 */
23 23
24 /* Jon's code is based on 6lowpan implementation for Contiki which is: 24 /* Jon's code is based on 6lowpan implementation for Contiki which is:
25 * Copyright (c) 2008, Swedish Institute of Computer Science. 25 * Copyright (c) 2008, Swedish Institute of Computer Science.
26 * All rights reserved. 26 * All rights reserved.
27 * 27 *
28 * Redistribution and use in source and binary forms, with or without 28 * Redistribution and use in source and binary forms, with or without
29 * modification, are permitted provided that the following conditions 29 * modification, are permitted provided that the following conditions
30 * are met: 30 * are met:
31 * 1. Redistributions of source code must retain the above copyright 31 * 1. Redistributions of source code must retain the above copyright
32 * notice, this list of conditions and the following disclaimer. 32 * notice, this list of conditions and the following disclaimer.
33 * 2. Redistributions in binary form must reproduce the above copyright 33 * 2. Redistributions in binary form must reproduce the above copyright
34 * notice, this list of conditions and the following disclaimer in the 34 * notice, this list of conditions and the following disclaimer in the
35 * documentation and/or other materials provided with the distribution. 35 * documentation and/or other materials provided with the distribution.
36 * 3. Neither the name of the Institute nor the names of its contributors 36 * 3. Neither the name of the Institute nor the names of its contributors
37 * may be used to endorse or promote products derived from this software 37 * may be used to endorse or promote products derived from this software
38 * without specific prior written permission. 38 * without specific prior written permission.
39 * 39 *
40 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 40 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 43 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50 * SUCH DAMAGE. 50 * SUCH DAMAGE.
51 */ 51 */
52 52
53 #include <linux/bitops.h> 53 #include <linux/bitops.h>
54 #include <linux/if_arp.h> 54 #include <linux/if_arp.h>
55 #include <linux/module.h> 55 #include <linux/module.h>
56 #include <linux/moduleparam.h> 56 #include <linux/moduleparam.h>
57 #include <linux/netdevice.h> 57 #include <linux/netdevice.h>
58 #include <net/af_ieee802154.h> 58 #include <net/af_ieee802154.h>
59 #include <net/ieee802154.h> 59 #include <net/ieee802154.h>
60 #include <net/ieee802154_netdev.h> 60 #include <net/ieee802154_netdev.h>
61 #include <net/ipv6.h> 61 #include <net/ipv6.h>
62 62
63 #include "6lowpan.h" 63 #include "6lowpan.h"
64 64
65 /* TTL uncompression values */ 65 /* TTL uncompression values */
66 static const u8 lowpan_ttl_values[] = {0, 1, 64, 255}; 66 static const u8 lowpan_ttl_values[] = {0, 1, 64, 255};
67 67
68 static LIST_HEAD(lowpan_devices); 68 static LIST_HEAD(lowpan_devices);
69 69
70 /* 70 /*
71 * Uncompression of linklocal: 71 * Uncompression of linklocal:
72 * 0 -> 16 bytes from packet 72 * 0 -> 16 bytes from packet
73 * 1 -> 2 bytes from prefix - bunch of zeroes and 8 from packet 73 * 1 -> 2 bytes from prefix - bunch of zeroes and 8 from packet
74 * 2 -> 2 bytes from prefix - zeroes + 2 from packet 74 * 2 -> 2 bytes from prefix - zeroes + 2 from packet
75 * 3 -> 2 bytes from prefix - infer 8 bytes from lladdr 75 * 3 -> 2 bytes from prefix - infer 8 bytes from lladdr
76 * 76 *
77 * NOTE: => the uncompress function does change 0xf to 0x10 77 * NOTE: => the uncompress function does change 0xf to 0x10
78 * NOTE: 0x00 => no-autoconfig => unspecified 78 * NOTE: 0x00 => no-autoconfig => unspecified
79 */ 79 */
80 static const u8 lowpan_unc_llconf[] = {0x0f, 0x28, 0x22, 0x20}; 80 static const u8 lowpan_unc_llconf[] = {0x0f, 0x28, 0x22, 0x20};
81 81
82 /* 82 /*
83 * Uncompression of ctx-based: 83 * Uncompression of ctx-based:
84 * 0 -> 0 bits from packet [unspecified / reserved] 84 * 0 -> 0 bits from packet [unspecified / reserved]
85 * 1 -> 8 bytes from prefix - bunch of zeroes and 8 from packet 85 * 1 -> 8 bytes from prefix - bunch of zeroes and 8 from packet
86 * 2 -> 8 bytes from prefix - zeroes + 2 from packet 86 * 2 -> 8 bytes from prefix - zeroes + 2 from packet
87 * 3 -> 8 bytes from prefix - infer 8 bytes from lladdr 87 * 3 -> 8 bytes from prefix - infer 8 bytes from lladdr
88 */ 88 */
89 static const u8 lowpan_unc_ctxconf[] = {0x00, 0x88, 0x82, 0x80}; 89 static const u8 lowpan_unc_ctxconf[] = {0x00, 0x88, 0x82, 0x80};
90 90
91 /* 91 /*
92 * Uncompression of ctx-base 92 * Uncompression of ctx-base
93 * 0 -> 0 bits from packet 93 * 0 -> 0 bits from packet
94 * 1 -> 2 bytes from prefix - bunch of zeroes 5 from packet 94 * 1 -> 2 bytes from prefix - bunch of zeroes 5 from packet
95 * 2 -> 2 bytes from prefix - zeroes + 3 from packet 95 * 2 -> 2 bytes from prefix - zeroes + 3 from packet
96 * 3 -> 2 bytes from prefix - infer 1 bytes from lladdr 96 * 3 -> 2 bytes from prefix - infer 1 bytes from lladdr
97 */ 97 */
98 static const u8 lowpan_unc_mxconf[] = {0x0f, 0x25, 0x23, 0x21}; 98 static const u8 lowpan_unc_mxconf[] = {0x0f, 0x25, 0x23, 0x21};
99 99
100 /* Link local prefix */ 100 /* Link local prefix */
101 static const u8 lowpan_llprefix[] = {0xfe, 0x80}; 101 static const u8 lowpan_llprefix[] = {0xfe, 0x80};
102 102
103 /* private device info */ 103 /* private device info */
104 struct lowpan_dev_info { 104 struct lowpan_dev_info {
105 struct net_device *real_dev; /* real WPAN device ptr */ 105 struct net_device *real_dev; /* real WPAN device ptr */
106 struct mutex dev_list_mtx; /* mutex for list ops */ 106 struct mutex dev_list_mtx; /* mutex for list ops */
107 }; 107 };
108 108
109 struct lowpan_dev_record { 109 struct lowpan_dev_record {
110 struct net_device *ldev; 110 struct net_device *ldev;
111 struct list_head list; 111 struct list_head list;
112 }; 112 };
113 113
114 struct lowpan_fragment { 114 struct lowpan_fragment {
115 struct sk_buff *skb; /* skb to be assembled */ 115 struct sk_buff *skb; /* skb to be assembled */
116 spinlock_t lock; /* concurency lock */ 116 spinlock_t lock; /* concurency lock */
117 u16 length; /* length to be assemled */ 117 u16 length; /* length to be assemled */
118 u32 bytes_rcv; /* bytes received */ 118 u32 bytes_rcv; /* bytes received */
119 u16 tag; /* current fragment tag */ 119 u16 tag; /* current fragment tag */
120 struct timer_list timer; /* assembling timer */ 120 struct timer_list timer; /* assembling timer */
121 struct list_head list; /* fragments list */ 121 struct list_head list; /* fragments list */
122 }; 122 };
123 123
124 static unsigned short fragment_tag; 124 static unsigned short fragment_tag;
125 static LIST_HEAD(lowpan_fragments); 125 static LIST_HEAD(lowpan_fragments);
126 static DEFINE_SPINLOCK(flist_lock); 126 static DEFINE_SPINLOCK(flist_lock);
127 127
128 static inline struct 128 static inline struct
129 lowpan_dev_info *lowpan_dev_info(const struct net_device *dev) 129 lowpan_dev_info *lowpan_dev_info(const struct net_device *dev)
130 { 130 {
131 return netdev_priv(dev); 131 return netdev_priv(dev);
132 } 132 }
133 133
134 static inline void lowpan_address_flip(u8 *src, u8 *dest) 134 static inline void lowpan_address_flip(u8 *src, u8 *dest)
135 { 135 {
136 int i; 136 int i;
137 for (i = 0; i < IEEE802154_ADDR_LEN; i++) 137 for (i = 0; i < IEEE802154_ADDR_LEN; i++)
138 (dest)[IEEE802154_ADDR_LEN - i - 1] = (src)[i]; 138 (dest)[IEEE802154_ADDR_LEN - i - 1] = (src)[i];
139 } 139 }
140 140
141 /* list of all 6lowpan devices, uses for package delivering */ 141 /* list of all 6lowpan devices, uses for package delivering */
142 /* print data in line */ 142 /* print data in line */
143 static inline void lowpan_raw_dump_inline(const char *caller, char *msg, 143 static inline void lowpan_raw_dump_inline(const char *caller, char *msg,
144 unsigned char *buf, int len) 144 unsigned char *buf, int len)
145 { 145 {
146 #ifdef DEBUG 146 #ifdef DEBUG
147 if (msg) 147 if (msg)
148 pr_debug("(%s) %s: ", caller, msg); 148 pr_debug("(%s) %s: ", caller, msg);
149 print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_NONE, 149 print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_NONE,
150 16, 1, buf, len, false); 150 16, 1, buf, len, false);
151 #endif /* DEBUG */ 151 #endif /* DEBUG */
152 } 152 }
153 153
154 /* 154 /*
155 * print data in a table format: 155 * print data in a table format:
156 * 156 *
157 * addr: xx xx xx xx xx xx 157 * addr: xx xx xx xx xx xx
158 * addr: xx xx xx xx xx xx 158 * addr: xx xx xx xx xx xx
159 * ... 159 * ...
160 */ 160 */
161 static inline void lowpan_raw_dump_table(const char *caller, char *msg, 161 static inline void lowpan_raw_dump_table(const char *caller, char *msg,
162 unsigned char *buf, int len) 162 unsigned char *buf, int len)
163 { 163 {
164 #ifdef DEBUG 164 #ifdef DEBUG
165 if (msg) 165 if (msg)
166 pr_debug("(%s) %s:\n", caller, msg); 166 pr_debug("(%s) %s:\n", caller, msg);
167 print_hex_dump(KERN_DEBUG, "\t", DUMP_PREFIX_OFFSET, 167 print_hex_dump(KERN_DEBUG, "\t", DUMP_PREFIX_OFFSET,
168 16, 1, buf, len, false); 168 16, 1, buf, len, false);
169 #endif /* DEBUG */ 169 #endif /* DEBUG */
170 } 170 }
171 171
172 static u8 172 static u8
173 lowpan_compress_addr_64(u8 **hc06_ptr, u8 shift, const struct in6_addr *ipaddr, 173 lowpan_compress_addr_64(u8 **hc06_ptr, u8 shift, const struct in6_addr *ipaddr,
174 const unsigned char *lladdr) 174 const unsigned char *lladdr)
175 { 175 {
176 u8 val = 0; 176 u8 val = 0;
177 177
178 if (is_addr_mac_addr_based(ipaddr, lladdr)) 178 if (is_addr_mac_addr_based(ipaddr, lladdr))
179 val = 3; /* 0-bits */ 179 val = 3; /* 0-bits */
180 else if (lowpan_is_iid_16_bit_compressable(ipaddr)) { 180 else if (lowpan_is_iid_16_bit_compressable(ipaddr)) {
181 /* compress IID to 16 bits xxxx::XXXX */ 181 /* compress IID to 16 bits xxxx::XXXX */
182 memcpy(*hc06_ptr, &ipaddr->s6_addr16[7], 2); 182 memcpy(*hc06_ptr, &ipaddr->s6_addr16[7], 2);
183 *hc06_ptr += 2; 183 *hc06_ptr += 2;
184 val = 2; /* 16-bits */ 184 val = 2; /* 16-bits */
185 } else { 185 } else {
186 /* do not compress IID => xxxx::IID */ 186 /* do not compress IID => xxxx::IID */
187 memcpy(*hc06_ptr, &ipaddr->s6_addr16[4], 8); 187 memcpy(*hc06_ptr, &ipaddr->s6_addr16[4], 8);
188 *hc06_ptr += 8; 188 *hc06_ptr += 8;
189 val = 1; /* 64-bits */ 189 val = 1; /* 64-bits */
190 } 190 }
191 191
192 return rol8(val, shift); 192 return rol8(val, shift);
193 } 193 }
194 194
195 static void 195 static void
196 lowpan_uip_ds6_set_addr_iid(struct in6_addr *ipaddr, unsigned char *lladdr) 196 lowpan_uip_ds6_set_addr_iid(struct in6_addr *ipaddr, unsigned char *lladdr)
197 { 197 {
198 memcpy(&ipaddr->s6_addr[8], lladdr, IEEE802154_ADDR_LEN); 198 memcpy(&ipaddr->s6_addr[8], lladdr, IEEE802154_ADDR_LEN);
199 /* second bit-flip (Universe/Local) is done according RFC2464 */ 199 /* second bit-flip (Universe/Local) is done according RFC2464 */
200 ipaddr->s6_addr[8] ^= 0x02; 200 ipaddr->s6_addr[8] ^= 0x02;
201 } 201 }
202 202
203 /* 203 /*
204 * Uncompress addresses based on a prefix and a postfix with zeroes in 204 * Uncompress addresses based on a prefix and a postfix with zeroes in
205 * between. If the postfix is zero in length it will use the link address 205 * between. If the postfix is zero in length it will use the link address
206 * to configure the IP address (autoconf style). 206 * to configure the IP address (autoconf style).
207 * pref_post_count takes a byte where the first nibble specify prefix count 207 * pref_post_count takes a byte where the first nibble specify prefix count
208 * and the second postfix count (NOTE: 15/0xf => 16 bytes copy). 208 * and the second postfix count (NOTE: 15/0xf => 16 bytes copy).
209 */ 209 */
210 static int 210 static int
211 lowpan_uncompress_addr(struct sk_buff *skb, struct in6_addr *ipaddr, 211 lowpan_uncompress_addr(struct sk_buff *skb, struct in6_addr *ipaddr,
212 u8 const *prefix, u8 pref_post_count, unsigned char *lladdr) 212 u8 const *prefix, u8 pref_post_count, unsigned char *lladdr)
213 { 213 {
214 u8 prefcount = pref_post_count >> 4; 214 u8 prefcount = pref_post_count >> 4;
215 u8 postcount = pref_post_count & 0x0f; 215 u8 postcount = pref_post_count & 0x0f;
216 216
217 /* full nibble 15 => 16 */ 217 /* full nibble 15 => 16 */
218 prefcount = (prefcount == 15 ? 16 : prefcount); 218 prefcount = (prefcount == 15 ? 16 : prefcount);
219 postcount = (postcount == 15 ? 16 : postcount); 219 postcount = (postcount == 15 ? 16 : postcount);
220 220
221 if (lladdr) 221 if (lladdr)
222 lowpan_raw_dump_inline(__func__, "linklocal address", 222 lowpan_raw_dump_inline(__func__, "linklocal address",
223 lladdr, IEEE802154_ADDR_LEN); 223 lladdr, IEEE802154_ADDR_LEN);
224 if (prefcount > 0) 224 if (prefcount > 0)
225 memcpy(ipaddr, prefix, prefcount); 225 memcpy(ipaddr, prefix, prefcount);
226 226
227 if (prefcount + postcount < 16) 227 if (prefcount + postcount < 16)
228 memset(&ipaddr->s6_addr[prefcount], 0, 228 memset(&ipaddr->s6_addr[prefcount], 0,
229 16 - (prefcount + postcount)); 229 16 - (prefcount + postcount));
230 230
231 if (postcount > 0) { 231 if (postcount > 0) {
232 memcpy(&ipaddr->s6_addr[16 - postcount], skb->data, postcount); 232 memcpy(&ipaddr->s6_addr[16 - postcount], skb->data, postcount);
233 skb_pull(skb, postcount); 233 skb_pull(skb, postcount);
234 } else if (prefcount > 0) { 234 } else if (prefcount > 0) {
235 if (lladdr == NULL) 235 if (lladdr == NULL)
236 return -EINVAL; 236 return -EINVAL;
237 237
238 /* no IID based configuration if no prefix and no data */ 238 /* no IID based configuration if no prefix and no data */
239 lowpan_uip_ds6_set_addr_iid(ipaddr, lladdr); 239 lowpan_uip_ds6_set_addr_iid(ipaddr, lladdr);
240 } 240 }
241 241
242 pr_debug("uncompressing %d + %d => ", prefcount, postcount); 242 pr_debug("uncompressing %d + %d => ", prefcount, postcount);
243 lowpan_raw_dump_inline(NULL, NULL, ipaddr->s6_addr, 16); 243 lowpan_raw_dump_inline(NULL, NULL, ipaddr->s6_addr, 16);
244 244
245 return 0; 245 return 0;
246 } 246 }
247 247
248 static void 248 static void
249 lowpan_compress_udp_header(u8 **hc06_ptr, struct sk_buff *skb) 249 lowpan_compress_udp_header(u8 **hc06_ptr, struct sk_buff *skb)
250 { 250 {
251 struct udphdr *uh = udp_hdr(skb); 251 struct udphdr *uh = udp_hdr(skb);
252 252
253 if (((uh->source & LOWPAN_NHC_UDP_4BIT_MASK) == 253 if (((uh->source & LOWPAN_NHC_UDP_4BIT_MASK) ==
254 LOWPAN_NHC_UDP_4BIT_PORT) && 254 LOWPAN_NHC_UDP_4BIT_PORT) &&
255 ((uh->dest & LOWPAN_NHC_UDP_4BIT_MASK) == 255 ((uh->dest & LOWPAN_NHC_UDP_4BIT_MASK) ==
256 LOWPAN_NHC_UDP_4BIT_PORT)) { 256 LOWPAN_NHC_UDP_4BIT_PORT)) {
257 pr_debug("UDP header: both ports compression to 4 bits\n"); 257 pr_debug("UDP header: both ports compression to 4 bits\n");
258 **hc06_ptr = LOWPAN_NHC_UDP_CS_P_11; 258 **hc06_ptr = LOWPAN_NHC_UDP_CS_P_11;
259 **(hc06_ptr + 1) = /* subtraction is faster */ 259 **(hc06_ptr + 1) = /* subtraction is faster */
260 (u8)((uh->dest - LOWPAN_NHC_UDP_4BIT_PORT) + 260 (u8)((uh->dest - LOWPAN_NHC_UDP_4BIT_PORT) +
261 ((uh->source & LOWPAN_NHC_UDP_4BIT_PORT) << 4)); 261 ((uh->source & LOWPAN_NHC_UDP_4BIT_PORT) << 4));
262 *hc06_ptr += 2; 262 *hc06_ptr += 2;
263 } else if ((uh->dest & LOWPAN_NHC_UDP_8BIT_MASK) == 263 } else if ((uh->dest & LOWPAN_NHC_UDP_8BIT_MASK) ==
264 LOWPAN_NHC_UDP_8BIT_PORT) { 264 LOWPAN_NHC_UDP_8BIT_PORT) {
265 pr_debug("UDP header: remove 8 bits of dest\n"); 265 pr_debug("UDP header: remove 8 bits of dest\n");
266 **hc06_ptr = LOWPAN_NHC_UDP_CS_P_01; 266 **hc06_ptr = LOWPAN_NHC_UDP_CS_P_01;
267 memcpy(*hc06_ptr + 1, &uh->source, 2); 267 memcpy(*hc06_ptr + 1, &uh->source, 2);
268 **(hc06_ptr + 3) = (u8)(uh->dest - LOWPAN_NHC_UDP_8BIT_PORT); 268 **(hc06_ptr + 3) = (u8)(uh->dest - LOWPAN_NHC_UDP_8BIT_PORT);
269 *hc06_ptr += 4; 269 *hc06_ptr += 4;
270 } else if ((uh->source & LOWPAN_NHC_UDP_8BIT_MASK) == 270 } else if ((uh->source & LOWPAN_NHC_UDP_8BIT_MASK) ==
271 LOWPAN_NHC_UDP_8BIT_PORT) { 271 LOWPAN_NHC_UDP_8BIT_PORT) {
272 pr_debug("UDP header: remove 8 bits of source\n"); 272 pr_debug("UDP header: remove 8 bits of source\n");
273 **hc06_ptr = LOWPAN_NHC_UDP_CS_P_10; 273 **hc06_ptr = LOWPAN_NHC_UDP_CS_P_10;
274 memcpy(*hc06_ptr + 1, &uh->dest, 2); 274 memcpy(*hc06_ptr + 1, &uh->dest, 2);
275 **(hc06_ptr + 3) = (u8)(uh->source - LOWPAN_NHC_UDP_8BIT_PORT); 275 **(hc06_ptr + 3) = (u8)(uh->source - LOWPAN_NHC_UDP_8BIT_PORT);
276 *hc06_ptr += 4; 276 *hc06_ptr += 4;
277 } else { 277 } else {
278 pr_debug("UDP header: can't compress\n"); 278 pr_debug("UDP header: can't compress\n");
279 **hc06_ptr = LOWPAN_NHC_UDP_CS_P_00; 279 **hc06_ptr = LOWPAN_NHC_UDP_CS_P_00;
280 memcpy(*hc06_ptr + 1, &uh->source, 2); 280 memcpy(*hc06_ptr + 1, &uh->source, 2);
281 memcpy(*hc06_ptr + 3, &uh->dest, 2); 281 memcpy(*hc06_ptr + 3, &uh->dest, 2);
282 *hc06_ptr += 5; 282 *hc06_ptr += 5;
283 } 283 }
284 284
285 /* checksum is always inline */ 285 /* checksum is always inline */
286 memcpy(*hc06_ptr, &uh->check, 2); 286 memcpy(*hc06_ptr, &uh->check, 2);
287 *hc06_ptr += 2; 287 *hc06_ptr += 2;
288 } 288 }
289 289
290 static inline int lowpan_fetch_skb_u8(struct sk_buff *skb, u8 *val) 290 static inline int lowpan_fetch_skb_u8(struct sk_buff *skb, u8 *val)
291 { 291 {
292 if (unlikely(!pskb_may_pull(skb, 1))) 292 if (unlikely(!pskb_may_pull(skb, 1)))
293 return -EINVAL; 293 return -EINVAL;
294 294
295 *val = skb->data[0]; 295 *val = skb->data[0];
296 skb_pull(skb, 1); 296 skb_pull(skb, 1);
297 297
298 return 0; 298 return 0;
299 } 299 }
300 300
301 static inline int lowpan_fetch_skb_u16(struct sk_buff *skb, u16 *val) 301 static inline int lowpan_fetch_skb_u16(struct sk_buff *skb, u16 *val)
302 { 302 {
303 if (unlikely(!pskb_may_pull(skb, 2))) 303 if (unlikely(!pskb_may_pull(skb, 2)))
304 return -EINVAL; 304 return -EINVAL;
305 305
306 *val = skb->data[0] | (skb->data[1] << 8); 306 *val = skb->data[0] | (skb->data[1] << 8);
307 skb_pull(skb, 2); 307 skb_pull(skb, 2);
308 308
309 return 0; 309 return 0;
310 } 310 }
311 311
312 static int 312 static int
313 lowpan_uncompress_udp_header(struct sk_buff *skb) 313 lowpan_uncompress_udp_header(struct sk_buff *skb)
314 { 314 {
315 struct udphdr *uh = udp_hdr(skb); 315 struct udphdr *uh = udp_hdr(skb);
316 u8 tmp; 316 u8 tmp;
317 317
318 if (lowpan_fetch_skb_u8(skb, &tmp)) 318 if (lowpan_fetch_skb_u8(skb, &tmp))
319 goto err; 319 goto err;
320 320
321 if ((tmp & LOWPAN_NHC_UDP_MASK) == LOWPAN_NHC_UDP_ID) { 321 if ((tmp & LOWPAN_NHC_UDP_MASK) == LOWPAN_NHC_UDP_ID) {
322 pr_debug("UDP header uncompression\n"); 322 pr_debug("UDP header uncompression\n");
323 switch (tmp & LOWPAN_NHC_UDP_CS_P_11) { 323 switch (tmp & LOWPAN_NHC_UDP_CS_P_11) {
324 case LOWPAN_NHC_UDP_CS_P_00: 324 case LOWPAN_NHC_UDP_CS_P_00:
325 memcpy(&uh->source, &skb->data[0], 2); 325 memcpy(&uh->source, &skb->data[0], 2);
326 memcpy(&uh->dest, &skb->data[2], 2); 326 memcpy(&uh->dest, &skb->data[2], 2);
327 skb_pull(skb, 4); 327 skb_pull(skb, 4);
328 break; 328 break;
329 case LOWPAN_NHC_UDP_CS_P_01: 329 case LOWPAN_NHC_UDP_CS_P_01:
330 memcpy(&uh->source, &skb->data[0], 2); 330 memcpy(&uh->source, &skb->data[0], 2);
331 uh->dest = 331 uh->dest =
332 skb->data[2] + LOWPAN_NHC_UDP_8BIT_PORT; 332 skb->data[2] + LOWPAN_NHC_UDP_8BIT_PORT;
333 skb_pull(skb, 3); 333 skb_pull(skb, 3);
334 break; 334 break;
335 case LOWPAN_NHC_UDP_CS_P_10: 335 case LOWPAN_NHC_UDP_CS_P_10:
336 uh->source = skb->data[0] + LOWPAN_NHC_UDP_8BIT_PORT; 336 uh->source = skb->data[0] + LOWPAN_NHC_UDP_8BIT_PORT;
337 memcpy(&uh->dest, &skb->data[1], 2); 337 memcpy(&uh->dest, &skb->data[1], 2);
338 skb_pull(skb, 3); 338 skb_pull(skb, 3);
339 break; 339 break;
340 case LOWPAN_NHC_UDP_CS_P_11: 340 case LOWPAN_NHC_UDP_CS_P_11:
341 uh->source = 341 uh->source =
342 LOWPAN_NHC_UDP_4BIT_PORT + (skb->data[0] >> 4); 342 LOWPAN_NHC_UDP_4BIT_PORT + (skb->data[0] >> 4);
343 uh->dest = 343 uh->dest =
344 LOWPAN_NHC_UDP_4BIT_PORT + (skb->data[0] & 0x0f); 344 LOWPAN_NHC_UDP_4BIT_PORT + (skb->data[0] & 0x0f);
345 skb_pull(skb, 1); 345 skb_pull(skb, 1);
346 break; 346 break;
347 default: 347 default:
348 pr_debug("ERROR: unknown UDP format\n"); 348 pr_debug("ERROR: unknown UDP format\n");
349 goto err; 349 goto err;
350 break; 350 break;
351 } 351 }
352 352
353 pr_debug("uncompressed UDP ports: src = %d, dst = %d\n", 353 pr_debug("uncompressed UDP ports: src = %d, dst = %d\n",
354 uh->source, uh->dest); 354 uh->source, uh->dest);
355 355
356 /* copy checksum */ 356 /* copy checksum */
357 memcpy(&uh->check, &skb->data[0], 2); 357 memcpy(&uh->check, &skb->data[0], 2);
358 skb_pull(skb, 2); 358 skb_pull(skb, 2);
359 } else { 359 } else {
360 pr_debug("ERROR: unsupported NH format\n"); 360 pr_debug("ERROR: unsupported NH format\n");
361 goto err; 361 goto err;
362 } 362 }
363 363
364 return 0; 364 return 0;
365 err: 365 err:
366 return -EINVAL; 366 return -EINVAL;
367 } 367 }
368 368
369 static int lowpan_header_create(struct sk_buff *skb, 369 static int lowpan_header_create(struct sk_buff *skb,
370 struct net_device *dev, 370 struct net_device *dev,
371 unsigned short type, const void *_daddr, 371 unsigned short type, const void *_daddr,
372 const void *_saddr, unsigned int len) 372 const void *_saddr, unsigned int len)
373 { 373 {
374 u8 tmp, iphc0, iphc1, *hc06_ptr; 374 u8 tmp, iphc0, iphc1, *hc06_ptr;
375 struct ipv6hdr *hdr; 375 struct ipv6hdr *hdr;
376 const u8 *saddr = _saddr; 376 const u8 *saddr = _saddr;
377 const u8 *daddr = _daddr; 377 const u8 *daddr = _daddr;
378 u8 *head; 378 u8 *head;
379 struct ieee802154_addr sa, da; 379 struct ieee802154_addr sa, da;
380 380
381 if (type != ETH_P_IPV6) 381 if (type != ETH_P_IPV6)
382 return 0; 382 return 0;
383 /* TODO: 383 /* TODO:
384 * if this package isn't ipv6 one, where should it be routed? 384 * if this package isn't ipv6 one, where should it be routed?
385 */ 385 */
386 head = kzalloc(100, GFP_KERNEL); 386 head = kzalloc(100, GFP_KERNEL);
387 if (head == NULL) 387 if (head == NULL)
388 return -ENOMEM; 388 return -ENOMEM;
389 389
390 hdr = ipv6_hdr(skb); 390 hdr = ipv6_hdr(skb);
391 hc06_ptr = head + 2; 391 hc06_ptr = head + 2;
392 392
393 pr_debug("IPv6 header dump:\n\tversion = %d\n\tlength = %d\n" 393 pr_debug("IPv6 header dump:\n\tversion = %d\n\tlength = %d\n"
394 "\tnexthdr = 0x%02x\n\thop_lim = %d\n", hdr->version, 394 "\tnexthdr = 0x%02x\n\thop_lim = %d\n", hdr->version,
395 ntohs(hdr->payload_len), hdr->nexthdr, hdr->hop_limit); 395 ntohs(hdr->payload_len), hdr->nexthdr, hdr->hop_limit);
396 396
397 lowpan_raw_dump_table(__func__, "raw skb network header dump", 397 lowpan_raw_dump_table(__func__, "raw skb network header dump",
398 skb_network_header(skb), sizeof(struct ipv6hdr)); 398 skb_network_header(skb), sizeof(struct ipv6hdr));
399 399
400 if (!saddr) 400 if (!saddr)
401 saddr = dev->dev_addr; 401 saddr = dev->dev_addr;
402 402
403 lowpan_raw_dump_inline(__func__, "saddr", (unsigned char *)saddr, 8); 403 lowpan_raw_dump_inline(__func__, "saddr", (unsigned char *)saddr, 8);
404 404
405 /* 405 /*
406 * As we copy some bit-length fields, in the IPHC encoding bytes, 406 * As we copy some bit-length fields, in the IPHC encoding bytes,
407 * we sometimes use |= 407 * we sometimes use |=
408 * If the field is 0, and the current bit value in memory is 1, 408 * If the field is 0, and the current bit value in memory is 1,
409 * this does not work. We therefore reset the IPHC encoding here 409 * this does not work. We therefore reset the IPHC encoding here
410 */ 410 */
411 iphc0 = LOWPAN_DISPATCH_IPHC; 411 iphc0 = LOWPAN_DISPATCH_IPHC;
412 iphc1 = 0; 412 iphc1 = 0;
413 413
414 /* TODO: context lookup */ 414 /* TODO: context lookup */
415 415
416 lowpan_raw_dump_inline(__func__, "daddr", (unsigned char *)daddr, 8); 416 lowpan_raw_dump_inline(__func__, "daddr", (unsigned char *)daddr, 8);
417 417
418 /* 418 /*
419 * Traffic class, flow label 419 * Traffic class, flow label
420 * If flow label is 0, compress it. If traffic class is 0, compress it 420 * If flow label is 0, compress it. If traffic class is 0, compress it
421 * We have to process both in the same time as the offset of traffic 421 * We have to process both in the same time as the offset of traffic
422 * class depends on the presence of version and flow label 422 * class depends on the presence of version and flow label
423 */ 423 */
424 424
425 /* hc06 format of TC is ECN | DSCP , original one is DSCP | ECN */ 425 /* hc06 format of TC is ECN | DSCP , original one is DSCP | ECN */
426 tmp = (hdr->priority << 4) | (hdr->flow_lbl[0] >> 4); 426 tmp = (hdr->priority << 4) | (hdr->flow_lbl[0] >> 4);
427 tmp = ((tmp & 0x03) << 6) | (tmp >> 2); 427 tmp = ((tmp & 0x03) << 6) | (tmp >> 2);
428 428
429 if (((hdr->flow_lbl[0] & 0x0F) == 0) && 429 if (((hdr->flow_lbl[0] & 0x0F) == 0) &&
430 (hdr->flow_lbl[1] == 0) && (hdr->flow_lbl[2] == 0)) { 430 (hdr->flow_lbl[1] == 0) && (hdr->flow_lbl[2] == 0)) {
431 /* flow label can be compressed */ 431 /* flow label can be compressed */
432 iphc0 |= LOWPAN_IPHC_FL_C; 432 iphc0 |= LOWPAN_IPHC_FL_C;
433 if ((hdr->priority == 0) && 433 if ((hdr->priority == 0) &&
434 ((hdr->flow_lbl[0] & 0xF0) == 0)) { 434 ((hdr->flow_lbl[0] & 0xF0) == 0)) {
435 /* compress (elide) all */ 435 /* compress (elide) all */
436 iphc0 |= LOWPAN_IPHC_TC_C; 436 iphc0 |= LOWPAN_IPHC_TC_C;
437 } else { 437 } else {
438 /* compress only the flow label */ 438 /* compress only the flow label */
439 *hc06_ptr = tmp; 439 *hc06_ptr = tmp;
440 hc06_ptr += 1; 440 hc06_ptr += 1;
441 } 441 }
442 } else { 442 } else {
443 /* Flow label cannot be compressed */ 443 /* Flow label cannot be compressed */
444 if ((hdr->priority == 0) && 444 if ((hdr->priority == 0) &&
445 ((hdr->flow_lbl[0] & 0xF0) == 0)) { 445 ((hdr->flow_lbl[0] & 0xF0) == 0)) {
446 /* compress only traffic class */ 446 /* compress only traffic class */
447 iphc0 |= LOWPAN_IPHC_TC_C; 447 iphc0 |= LOWPAN_IPHC_TC_C;
448 *hc06_ptr = (tmp & 0xc0) | (hdr->flow_lbl[0] & 0x0F); 448 *hc06_ptr = (tmp & 0xc0) | (hdr->flow_lbl[0] & 0x0F);
449 memcpy(hc06_ptr + 1, &hdr->flow_lbl[1], 2); 449 memcpy(hc06_ptr + 1, &hdr->flow_lbl[1], 2);
450 hc06_ptr += 3; 450 hc06_ptr += 3;
451 } else { 451 } else {
452 /* compress nothing */ 452 /* compress nothing */
453 memcpy(hc06_ptr, &hdr, 4); 453 memcpy(hc06_ptr, &hdr, 4);
454 /* replace the top byte with new ECN | DSCP format */ 454 /* replace the top byte with new ECN | DSCP format */
455 *hc06_ptr = tmp; 455 *hc06_ptr = tmp;
456 hc06_ptr += 4; 456 hc06_ptr += 4;
457 } 457 }
458 } 458 }
459 459
460 /* NOTE: payload length is always compressed */ 460 /* NOTE: payload length is always compressed */
461 461
462 /* Next Header is compress if UDP */ 462 /* Next Header is compress if UDP */
463 if (hdr->nexthdr == UIP_PROTO_UDP) 463 if (hdr->nexthdr == UIP_PROTO_UDP)
464 iphc0 |= LOWPAN_IPHC_NH_C; 464 iphc0 |= LOWPAN_IPHC_NH_C;
465 465
466 if ((iphc0 & LOWPAN_IPHC_NH_C) == 0) { 466 if ((iphc0 & LOWPAN_IPHC_NH_C) == 0) {
467 *hc06_ptr = hdr->nexthdr; 467 *hc06_ptr = hdr->nexthdr;
468 hc06_ptr += 1; 468 hc06_ptr += 1;
469 } 469 }
470 470
471 /* 471 /*
472 * Hop limit 472 * Hop limit
473 * if 1: compress, encoding is 01 473 * if 1: compress, encoding is 01
474 * if 64: compress, encoding is 10 474 * if 64: compress, encoding is 10
475 * if 255: compress, encoding is 11 475 * if 255: compress, encoding is 11
476 * else do not compress 476 * else do not compress
477 */ 477 */
478 switch (hdr->hop_limit) { 478 switch (hdr->hop_limit) {
479 case 1: 479 case 1:
480 iphc0 |= LOWPAN_IPHC_TTL_1; 480 iphc0 |= LOWPAN_IPHC_TTL_1;
481 break; 481 break;
482 case 64: 482 case 64:
483 iphc0 |= LOWPAN_IPHC_TTL_64; 483 iphc0 |= LOWPAN_IPHC_TTL_64;
484 break; 484 break;
485 case 255: 485 case 255:
486 iphc0 |= LOWPAN_IPHC_TTL_255; 486 iphc0 |= LOWPAN_IPHC_TTL_255;
487 break; 487 break;
488 default: 488 default:
489 *hc06_ptr = hdr->hop_limit; 489 *hc06_ptr = hdr->hop_limit;
490 hc06_ptr += 1; 490 hc06_ptr += 1;
491 break; 491 break;
492 } 492 }
493 493
494 /* source address compression */ 494 /* source address compression */
495 if (is_addr_unspecified(&hdr->saddr)) { 495 if (is_addr_unspecified(&hdr->saddr)) {
496 pr_debug("source address is unspecified, setting SAC\n"); 496 pr_debug("source address is unspecified, setting SAC\n");
497 iphc1 |= LOWPAN_IPHC_SAC; 497 iphc1 |= LOWPAN_IPHC_SAC;
498 /* TODO: context lookup */ 498 /* TODO: context lookup */
499 } else if (is_addr_link_local(&hdr->saddr)) { 499 } else if (is_addr_link_local(&hdr->saddr)) {
500 pr_debug("source address is link-local\n"); 500 pr_debug("source address is link-local\n");
501 iphc1 |= lowpan_compress_addr_64(&hc06_ptr, 501 iphc1 |= lowpan_compress_addr_64(&hc06_ptr,
502 LOWPAN_IPHC_SAM_BIT, &hdr->saddr, saddr); 502 LOWPAN_IPHC_SAM_BIT, &hdr->saddr, saddr);
503 } else { 503 } else {
504 pr_debug("send the full source address\n"); 504 pr_debug("send the full source address\n");
505 memcpy(hc06_ptr, &hdr->saddr.s6_addr16[0], 16); 505 memcpy(hc06_ptr, &hdr->saddr.s6_addr16[0], 16);
506 hc06_ptr += 16; 506 hc06_ptr += 16;
507 } 507 }
508 508
509 /* destination address compression */ 509 /* destination address compression */
510 if (is_addr_mcast(&hdr->daddr)) { 510 if (is_addr_mcast(&hdr->daddr)) {
511 pr_debug("destination address is multicast: "); 511 pr_debug("destination address is multicast: ");
512 iphc1 |= LOWPAN_IPHC_M; 512 iphc1 |= LOWPAN_IPHC_M;
513 if (lowpan_is_mcast_addr_compressable8(&hdr->daddr)) { 513 if (lowpan_is_mcast_addr_compressable8(&hdr->daddr)) {
514 pr_debug("compressed to 1 octet\n"); 514 pr_debug("compressed to 1 octet\n");
515 iphc1 |= LOWPAN_IPHC_DAM_11; 515 iphc1 |= LOWPAN_IPHC_DAM_11;
516 /* use last byte */ 516 /* use last byte */
517 *hc06_ptr = hdr->daddr.s6_addr[15]; 517 *hc06_ptr = hdr->daddr.s6_addr[15];
518 hc06_ptr += 1; 518 hc06_ptr += 1;
519 } else if (lowpan_is_mcast_addr_compressable32(&hdr->daddr)) { 519 } else if (lowpan_is_mcast_addr_compressable32(&hdr->daddr)) {
520 pr_debug("compressed to 4 octets\n"); 520 pr_debug("compressed to 4 octets\n");
521 iphc1 |= LOWPAN_IPHC_DAM_10; 521 iphc1 |= LOWPAN_IPHC_DAM_10;
522 /* second byte + the last three */ 522 /* second byte + the last three */
523 *hc06_ptr = hdr->daddr.s6_addr[1]; 523 *hc06_ptr = hdr->daddr.s6_addr[1];
524 memcpy(hc06_ptr + 1, &hdr->daddr.s6_addr[13], 3); 524 memcpy(hc06_ptr + 1, &hdr->daddr.s6_addr[13], 3);
525 hc06_ptr += 4; 525 hc06_ptr += 4;
526 } else if (lowpan_is_mcast_addr_compressable48(&hdr->daddr)) { 526 } else if (lowpan_is_mcast_addr_compressable48(&hdr->daddr)) {
527 pr_debug("compressed to 6 octets\n"); 527 pr_debug("compressed to 6 octets\n");
528 iphc1 |= LOWPAN_IPHC_DAM_01; 528 iphc1 |= LOWPAN_IPHC_DAM_01;
529 /* second byte + the last five */ 529 /* second byte + the last five */
530 *hc06_ptr = hdr->daddr.s6_addr[1]; 530 *hc06_ptr = hdr->daddr.s6_addr[1];
531 memcpy(hc06_ptr + 1, &hdr->daddr.s6_addr[11], 5); 531 memcpy(hc06_ptr + 1, &hdr->daddr.s6_addr[11], 5);
532 hc06_ptr += 6; 532 hc06_ptr += 6;
533 } else { 533 } else {
534 pr_debug("using full address\n"); 534 pr_debug("using full address\n");
535 iphc1 |= LOWPAN_IPHC_DAM_00; 535 iphc1 |= LOWPAN_IPHC_DAM_00;
536 memcpy(hc06_ptr, &hdr->daddr.s6_addr[0], 16); 536 memcpy(hc06_ptr, &hdr->daddr.s6_addr[0], 16);
537 hc06_ptr += 16; 537 hc06_ptr += 16;
538 } 538 }
539 } else { 539 } else {
540 /* TODO: context lookup */ 540 /* TODO: context lookup */
541 if (is_addr_link_local(&hdr->daddr)) { 541 if (is_addr_link_local(&hdr->daddr)) {
542 pr_debug("dest address is unicast and link-local\n"); 542 pr_debug("dest address is unicast and link-local\n");
543 iphc1 |= lowpan_compress_addr_64(&hc06_ptr, 543 iphc1 |= lowpan_compress_addr_64(&hc06_ptr,
544 LOWPAN_IPHC_DAM_BIT, &hdr->daddr, daddr); 544 LOWPAN_IPHC_DAM_BIT, &hdr->daddr, daddr);
545 } else { 545 } else {
546 pr_debug("dest address is unicast: using full one\n"); 546 pr_debug("dest address is unicast: using full one\n");
547 memcpy(hc06_ptr, &hdr->daddr.s6_addr16[0], 16); 547 memcpy(hc06_ptr, &hdr->daddr.s6_addr16[0], 16);
548 hc06_ptr += 16; 548 hc06_ptr += 16;
549 } 549 }
550 } 550 }
551 551
552 /* UDP header compression */ 552 /* UDP header compression */
553 if (hdr->nexthdr == UIP_PROTO_UDP) 553 if (hdr->nexthdr == UIP_PROTO_UDP)
554 lowpan_compress_udp_header(&hc06_ptr, skb); 554 lowpan_compress_udp_header(&hc06_ptr, skb);
555 555
556 head[0] = iphc0; 556 head[0] = iphc0;
557 head[1] = iphc1; 557 head[1] = iphc1;
558 558
559 skb_pull(skb, sizeof(struct ipv6hdr)); 559 skb_pull(skb, sizeof(struct ipv6hdr));
560 memcpy(skb_push(skb, hc06_ptr - head), head, hc06_ptr - head); 560 memcpy(skb_push(skb, hc06_ptr - head), head, hc06_ptr - head);
561 561
562 kfree(head); 562 kfree(head);
563 563
564 lowpan_raw_dump_table(__func__, "raw skb data dump", skb->data, 564 lowpan_raw_dump_table(__func__, "raw skb data dump", skb->data,
565 skb->len); 565 skb->len);
566 566
567 /* 567 /*
568 * NOTE1: I'm still unsure about the fact that compression and WPAN 568 * NOTE1: I'm still unsure about the fact that compression and WPAN
569 * header are created here and not later in the xmit. So wait for 569 * header are created here and not later in the xmit. So wait for
570 * an opinion of net maintainers. 570 * an opinion of net maintainers.
571 */ 571 */
572 /* 572 /*
573 * NOTE2: to be absolutely correct, we must derive PANid information 573 * NOTE2: to be absolutely correct, we must derive PANid information
574 * from MAC subif of the 'dev' and 'real_dev' network devices, but 574 * from MAC subif of the 'dev' and 'real_dev' network devices, but
575 * this isn't implemented in mainline yet, so currently we assign 0xff 575 * this isn't implemented in mainline yet, so currently we assign 0xff
576 */ 576 */
577 { 577 {
578 /* prepare wpan address data */ 578 /* prepare wpan address data */
579 sa.addr_type = IEEE802154_ADDR_LONG; 579 sa.addr_type = IEEE802154_ADDR_LONG;
580 sa.pan_id = 0xff; 580 sa.pan_id = 0xff;
581 581
582 da.addr_type = IEEE802154_ADDR_LONG; 582 da.addr_type = IEEE802154_ADDR_LONG;
583 da.pan_id = 0xff; 583 da.pan_id = 0xff;
584 584
585 memcpy(&(da.hwaddr), daddr, 8); 585 memcpy(&(da.hwaddr), daddr, 8);
586 memcpy(&(sa.hwaddr), saddr, 8); 586 memcpy(&(sa.hwaddr), saddr, 8);
587 587
588 mac_cb(skb)->flags = IEEE802154_FC_TYPE_DATA; 588 mac_cb(skb)->flags = IEEE802154_FC_TYPE_DATA;
589 589
590 return dev_hard_header(skb, lowpan_dev_info(dev)->real_dev, 590 return dev_hard_header(skb, lowpan_dev_info(dev)->real_dev,
591 type, (void *)&da, (void *)&sa, skb->len); 591 type, (void *)&da, (void *)&sa, skb->len);
592 } 592 }
593 } 593 }
594 594
595 static int lowpan_skb_deliver(struct sk_buff *skb, struct ipv6hdr *hdr) 595 static int lowpan_skb_deliver(struct sk_buff *skb, struct ipv6hdr *hdr)
596 { 596 {
597 struct sk_buff *new; 597 struct sk_buff *new;
598 struct lowpan_dev_record *entry; 598 struct lowpan_dev_record *entry;
599 int stat = NET_RX_SUCCESS; 599 int stat = NET_RX_SUCCESS;
600 600
601 new = skb_copy_expand(skb, sizeof(struct ipv6hdr), skb_tailroom(skb), 601 new = skb_copy_expand(skb, sizeof(struct ipv6hdr), skb_tailroom(skb),
602 GFP_ATOMIC); 602 GFP_ATOMIC);
603 kfree_skb(skb); 603 kfree_skb(skb);
604 604
605 if (!new) 605 if (!new)
606 return -ENOMEM; 606 return -ENOMEM;
607 607
608 skb_push(new, sizeof(struct ipv6hdr)); 608 skb_push(new, sizeof(struct ipv6hdr));
609 skb_reset_network_header(new); 609 skb_reset_network_header(new);
610 skb_copy_to_linear_data(new, hdr, sizeof(struct ipv6hdr)); 610 skb_copy_to_linear_data(new, hdr, sizeof(struct ipv6hdr));
611 611
612 new->protocol = htons(ETH_P_IPV6); 612 new->protocol = htons(ETH_P_IPV6);
613 new->pkt_type = PACKET_HOST; 613 new->pkt_type = PACKET_HOST;
614 614
615 rcu_read_lock(); 615 rcu_read_lock();
616 list_for_each_entry_rcu(entry, &lowpan_devices, list) 616 list_for_each_entry_rcu(entry, &lowpan_devices, list)
617 if (lowpan_dev_info(entry->ldev)->real_dev == new->dev) { 617 if (lowpan_dev_info(entry->ldev)->real_dev == new->dev) {
618 skb = skb_copy(new, GFP_ATOMIC); 618 skb = skb_copy(new, GFP_ATOMIC);
619 if (!skb) { 619 if (!skb) {
620 stat = -ENOMEM; 620 stat = -ENOMEM;
621 break; 621 break;
622 } 622 }
623 623
624 skb->dev = entry->ldev; 624 skb->dev = entry->ldev;
625 stat = netif_rx(skb); 625 stat = netif_rx(skb);
626 } 626 }
627 rcu_read_unlock(); 627 rcu_read_unlock();
628 628
629 kfree_skb(new); 629 kfree_skb(new);
630 630
631 return stat; 631 return stat;
632 } 632 }
633 633
634 static void lowpan_fragment_timer_expired(unsigned long entry_addr) 634 static void lowpan_fragment_timer_expired(unsigned long entry_addr)
635 { 635 {
636 struct lowpan_fragment *entry = (struct lowpan_fragment *)entry_addr; 636 struct lowpan_fragment *entry = (struct lowpan_fragment *)entry_addr;
637 637
638 pr_debug("timer expired for frame with tag %d\n", entry->tag); 638 pr_debug("timer expired for frame with tag %d\n", entry->tag);
639 639
640 spin_lock(&flist_lock); 640 spin_lock(&flist_lock);
641 list_del(&entry->list); 641 list_del(&entry->list);
642 spin_unlock(&flist_lock); 642 spin_unlock(&flist_lock);
643 643
644 dev_kfree_skb(entry->skb); 644 dev_kfree_skb(entry->skb);
645 kfree(entry); 645 kfree(entry);
646 } 646 }
647 647
648 static struct lowpan_fragment * 648 static struct lowpan_fragment *
649 lowpan_alloc_new_frame(struct sk_buff *skb, u8 iphc0, u8 len, u8 tag) 649 lowpan_alloc_new_frame(struct sk_buff *skb, u8 iphc0, u8 len, u16 tag)
650 { 650 {
651 struct lowpan_fragment *frame; 651 struct lowpan_fragment *frame;
652 652
653 frame = kzalloc(sizeof(struct lowpan_fragment), 653 frame = kzalloc(sizeof(struct lowpan_fragment),
654 GFP_ATOMIC); 654 GFP_ATOMIC);
655 if (!frame) 655 if (!frame)
656 goto frame_err; 656 goto frame_err;
657 657
658 INIT_LIST_HEAD(&frame->list); 658 INIT_LIST_HEAD(&frame->list);
659 659
660 frame->length = (iphc0 & 7) | (len << 3); 660 frame->length = (iphc0 & 7) | (len << 3);
661 frame->tag = tag; 661 frame->tag = tag;
662 662
663 /* allocate buffer for frame assembling */ 663 /* allocate buffer for frame assembling */
664 frame->skb = netdev_alloc_skb_ip_align(skb->dev, frame->length + 664 frame->skb = netdev_alloc_skb_ip_align(skb->dev, frame->length +
665 sizeof(struct ipv6hdr)); 665 sizeof(struct ipv6hdr));
666 666
667 if (!frame->skb) 667 if (!frame->skb)
668 goto skb_err; 668 goto skb_err;
669 669
670 frame->skb->priority = skb->priority; 670 frame->skb->priority = skb->priority;
671 frame->skb->dev = skb->dev; 671 frame->skb->dev = skb->dev;
672 672
673 /* reserve headroom for uncompressed ipv6 header */ 673 /* reserve headroom for uncompressed ipv6 header */
674 skb_reserve(frame->skb, sizeof(struct ipv6hdr)); 674 skb_reserve(frame->skb, sizeof(struct ipv6hdr));
675 skb_put(frame->skb, frame->length); 675 skb_put(frame->skb, frame->length);
676 676
677 init_timer(&frame->timer); 677 init_timer(&frame->timer);
678 /* time out is the same as for ipv6 - 60 sec */ 678 /* time out is the same as for ipv6 - 60 sec */
679 frame->timer.expires = jiffies + LOWPAN_FRAG_TIMEOUT; 679 frame->timer.expires = jiffies + LOWPAN_FRAG_TIMEOUT;
680 frame->timer.data = (unsigned long)frame; 680 frame->timer.data = (unsigned long)frame;
681 frame->timer.function = lowpan_fragment_timer_expired; 681 frame->timer.function = lowpan_fragment_timer_expired;
682 682
683 add_timer(&frame->timer); 683 add_timer(&frame->timer);
684 684
685 list_add_tail(&frame->list, &lowpan_fragments); 685 list_add_tail(&frame->list, &lowpan_fragments);
686 686
687 return frame; 687 return frame;
688 688
689 skb_err: 689 skb_err:
690 kfree(frame); 690 kfree(frame);
691 frame_err: 691 frame_err:
692 return NULL; 692 return NULL;
693 } 693 }
694 694
695 static int 695 static int
696 lowpan_process_data(struct sk_buff *skb) 696 lowpan_process_data(struct sk_buff *skb)
697 { 697 {
698 struct ipv6hdr hdr; 698 struct ipv6hdr hdr;
699 u8 tmp, iphc0, iphc1, num_context = 0; 699 u8 tmp, iphc0, iphc1, num_context = 0;
700 u8 *_saddr, *_daddr; 700 u8 *_saddr, *_daddr;
701 int err; 701 int err;
702 702
703 lowpan_raw_dump_table(__func__, "raw skb data dump", skb->data, 703 lowpan_raw_dump_table(__func__, "raw skb data dump", skb->data,
704 skb->len); 704 skb->len);
705 /* at least two bytes will be used for the encoding */ 705 /* at least two bytes will be used for the encoding */
706 if (skb->len < 2) 706 if (skb->len < 2)
707 goto drop; 707 goto drop;
708 708
709 if (lowpan_fetch_skb_u8(skb, &iphc0)) 709 if (lowpan_fetch_skb_u8(skb, &iphc0))
710 goto drop; 710 goto drop;
711 711
712 /* fragments assembling */ 712 /* fragments assembling */
713 switch (iphc0 & LOWPAN_DISPATCH_MASK) { 713 switch (iphc0 & LOWPAN_DISPATCH_MASK) {
714 case LOWPAN_DISPATCH_FRAG1: 714 case LOWPAN_DISPATCH_FRAG1:
715 case LOWPAN_DISPATCH_FRAGN: 715 case LOWPAN_DISPATCH_FRAGN:
716 { 716 {
717 struct lowpan_fragment *frame; 717 struct lowpan_fragment *frame;
718 u8 len, offset; 718 u8 len, offset;
719 u16 tag; 719 u16 tag;
720 bool found = false; 720 bool found = false;
721 721
722 if (lowpan_fetch_skb_u8(skb, &len) || /* frame length */ 722 if (lowpan_fetch_skb_u8(skb, &len) || /* frame length */
723 lowpan_fetch_skb_u16(skb, &tag)) /* fragment tag */ 723 lowpan_fetch_skb_u16(skb, &tag)) /* fragment tag */
724 goto drop; 724 goto drop;
725 725
726 /* 726 /*
727 * check if frame assembling with the same tag is 727 * check if frame assembling with the same tag is
728 * already in progress 728 * already in progress
729 */ 729 */
730 spin_lock(&flist_lock); 730 spin_lock(&flist_lock);
731 731
732 list_for_each_entry(frame, &lowpan_fragments, list) 732 list_for_each_entry(frame, &lowpan_fragments, list)
733 if (frame->tag == tag) { 733 if (frame->tag == tag) {
734 found = true; 734 found = true;
735 break; 735 break;
736 } 736 }
737 737
738 /* alloc new frame structure */ 738 /* alloc new frame structure */
739 if (!found) { 739 if (!found) {
740 frame = lowpan_alloc_new_frame(skb, iphc0, len, tag); 740 frame = lowpan_alloc_new_frame(skb, iphc0, len, tag);
741 if (!frame) 741 if (!frame)
742 goto unlock_and_drop; 742 goto unlock_and_drop;
743 } 743 }
744 744
745 if ((iphc0 & LOWPAN_DISPATCH_MASK) == LOWPAN_DISPATCH_FRAG1) 745 if ((iphc0 & LOWPAN_DISPATCH_MASK) == LOWPAN_DISPATCH_FRAG1)
746 goto unlock_and_drop; 746 goto unlock_and_drop;
747 747
748 if (lowpan_fetch_skb_u8(skb, &offset)) /* fetch offset */ 748 if (lowpan_fetch_skb_u8(skb, &offset)) /* fetch offset */
749 goto unlock_and_drop; 749 goto unlock_and_drop;
750 750
751 /* if payload fits buffer, copy it */ 751 /* if payload fits buffer, copy it */
752 if (likely((offset * 8 + skb->len) <= frame->length)) 752 if (likely((offset * 8 + skb->len) <= frame->length))
753 skb_copy_to_linear_data_offset(frame->skb, offset * 8, 753 skb_copy_to_linear_data_offset(frame->skb, offset * 8,
754 skb->data, skb->len); 754 skb->data, skb->len);
755 else 755 else
756 goto unlock_and_drop; 756 goto unlock_and_drop;
757 757
758 frame->bytes_rcv += skb->len; 758 frame->bytes_rcv += skb->len;
759 759
760 /* frame assembling complete */ 760 /* frame assembling complete */
761 if ((frame->bytes_rcv == frame->length) && 761 if ((frame->bytes_rcv == frame->length) &&
762 frame->timer.expires > jiffies) { 762 frame->timer.expires > jiffies) {
763 /* if timer haven't expired - first of all delete it */ 763 /* if timer haven't expired - first of all delete it */
764 del_timer(&frame->timer); 764 del_timer(&frame->timer);
765 list_del(&frame->list); 765 list_del(&frame->list);
766 spin_unlock(&flist_lock); 766 spin_unlock(&flist_lock);
767 767
768 dev_kfree_skb(skb); 768 dev_kfree_skb(skb);
769 skb = frame->skb; 769 skb = frame->skb;
770 kfree(frame); 770 kfree(frame);
771 771
772 if (lowpan_fetch_skb_u8(skb, &iphc0)) 772 if (lowpan_fetch_skb_u8(skb, &iphc0))
773 goto drop; 773 goto drop;
774 774
775 break; 775 break;
776 } 776 }
777 spin_unlock(&flist_lock); 777 spin_unlock(&flist_lock);
778 778
779 return kfree_skb(skb), 0; 779 return kfree_skb(skb), 0;
780 } 780 }
781 default: 781 default:
782 break; 782 break;
783 } 783 }
784 784
785 if (lowpan_fetch_skb_u8(skb, &iphc1)) 785 if (lowpan_fetch_skb_u8(skb, &iphc1))
786 goto drop; 786 goto drop;
787 787
788 _saddr = mac_cb(skb)->sa.hwaddr; 788 _saddr = mac_cb(skb)->sa.hwaddr;
789 _daddr = mac_cb(skb)->da.hwaddr; 789 _daddr = mac_cb(skb)->da.hwaddr;
790 790
791 pr_debug("iphc0 = %02x, iphc1 = %02x\n", iphc0, iphc1); 791 pr_debug("iphc0 = %02x, iphc1 = %02x\n", iphc0, iphc1);
792 792
793 /* another if the CID flag is set */ 793 /* another if the CID flag is set */
794 if (iphc1 & LOWPAN_IPHC_CID) { 794 if (iphc1 & LOWPAN_IPHC_CID) {
795 pr_debug("CID flag is set, increase header with one\n"); 795 pr_debug("CID flag is set, increase header with one\n");
796 if (lowpan_fetch_skb_u8(skb, &num_context)) 796 if (lowpan_fetch_skb_u8(skb, &num_context))
797 goto drop; 797 goto drop;
798 } 798 }
799 799
800 hdr.version = 6; 800 hdr.version = 6;
801 801
802 /* Traffic Class and Flow Label */ 802 /* Traffic Class and Flow Label */
803 switch ((iphc0 & LOWPAN_IPHC_TF) >> 3) { 803 switch ((iphc0 & LOWPAN_IPHC_TF) >> 3) {
804 /* 804 /*
805 * Traffic Class and FLow Label carried in-line 805 * Traffic Class and FLow Label carried in-line
806 * ECN + DSCP + 4-bit Pad + Flow Label (4 bytes) 806 * ECN + DSCP + 4-bit Pad + Flow Label (4 bytes)
807 */ 807 */
808 case 0: /* 00b */ 808 case 0: /* 00b */
809 if (lowpan_fetch_skb_u8(skb, &tmp)) 809 if (lowpan_fetch_skb_u8(skb, &tmp))
810 goto drop; 810 goto drop;
811 811
812 memcpy(&hdr.flow_lbl, &skb->data[0], 3); 812 memcpy(&hdr.flow_lbl, &skb->data[0], 3);
813 skb_pull(skb, 3); 813 skb_pull(skb, 3);
814 hdr.priority = ((tmp >> 2) & 0x0f); 814 hdr.priority = ((tmp >> 2) & 0x0f);
815 hdr.flow_lbl[0] = ((tmp >> 2) & 0x30) | (tmp << 6) | 815 hdr.flow_lbl[0] = ((tmp >> 2) & 0x30) | (tmp << 6) |
816 (hdr.flow_lbl[0] & 0x0f); 816 (hdr.flow_lbl[0] & 0x0f);
817 break; 817 break;
818 /* 818 /*
819 * Traffic class carried in-line 819 * Traffic class carried in-line
820 * ECN + DSCP (1 byte), Flow Label is elided 820 * ECN + DSCP (1 byte), Flow Label is elided
821 */ 821 */
822 case 1: /* 10b */ 822 case 1: /* 10b */
823 if (lowpan_fetch_skb_u8(skb, &tmp)) 823 if (lowpan_fetch_skb_u8(skb, &tmp))
824 goto drop; 824 goto drop;
825 825
826 hdr.priority = ((tmp >> 2) & 0x0f); 826 hdr.priority = ((tmp >> 2) & 0x0f);
827 hdr.flow_lbl[0] = ((tmp << 6) & 0xC0) | ((tmp >> 2) & 0x30); 827 hdr.flow_lbl[0] = ((tmp << 6) & 0xC0) | ((tmp >> 2) & 0x30);
828 hdr.flow_lbl[1] = 0; 828 hdr.flow_lbl[1] = 0;
829 hdr.flow_lbl[2] = 0; 829 hdr.flow_lbl[2] = 0;
830 break; 830 break;
831 /* 831 /*
832 * Flow Label carried in-line 832 * Flow Label carried in-line
833 * ECN + 2-bit Pad + Flow Label (3 bytes), DSCP is elided 833 * ECN + 2-bit Pad + Flow Label (3 bytes), DSCP is elided
834 */ 834 */
835 case 2: /* 01b */ 835 case 2: /* 01b */
836 if (lowpan_fetch_skb_u8(skb, &tmp)) 836 if (lowpan_fetch_skb_u8(skb, &tmp))
837 goto drop; 837 goto drop;
838 838
839 hdr.flow_lbl[0] = (skb->data[0] & 0x0F) | ((tmp >> 2) & 0x30); 839 hdr.flow_lbl[0] = (skb->data[0] & 0x0F) | ((tmp >> 2) & 0x30);
840 memcpy(&hdr.flow_lbl[1], &skb->data[0], 2); 840 memcpy(&hdr.flow_lbl[1], &skb->data[0], 2);
841 skb_pull(skb, 2); 841 skb_pull(skb, 2);
842 break; 842 break;
843 /* Traffic Class and Flow Label are elided */ 843 /* Traffic Class and Flow Label are elided */
844 case 3: /* 11b */ 844 case 3: /* 11b */
845 hdr.priority = 0; 845 hdr.priority = 0;
846 hdr.flow_lbl[0] = 0; 846 hdr.flow_lbl[0] = 0;
847 hdr.flow_lbl[1] = 0; 847 hdr.flow_lbl[1] = 0;
848 hdr.flow_lbl[2] = 0; 848 hdr.flow_lbl[2] = 0;
849 break; 849 break;
850 default: 850 default:
851 break; 851 break;
852 } 852 }
853 853
854 /* Next Header */ 854 /* Next Header */
855 if ((iphc0 & LOWPAN_IPHC_NH_C) == 0) { 855 if ((iphc0 & LOWPAN_IPHC_NH_C) == 0) {
856 /* Next header is carried inline */ 856 /* Next header is carried inline */
857 if (lowpan_fetch_skb_u8(skb, &(hdr.nexthdr))) 857 if (lowpan_fetch_skb_u8(skb, &(hdr.nexthdr)))
858 goto drop; 858 goto drop;
859 859
860 pr_debug("NH flag is set, next header carried inline: %02x\n", 860 pr_debug("NH flag is set, next header carried inline: %02x\n",
861 hdr.nexthdr); 861 hdr.nexthdr);
862 } 862 }
863 863
864 /* Hop Limit */ 864 /* Hop Limit */
865 if ((iphc0 & 0x03) != LOWPAN_IPHC_TTL_I) 865 if ((iphc0 & 0x03) != LOWPAN_IPHC_TTL_I)
866 hdr.hop_limit = lowpan_ttl_values[iphc0 & 0x03]; 866 hdr.hop_limit = lowpan_ttl_values[iphc0 & 0x03];
867 else { 867 else {
868 if (lowpan_fetch_skb_u8(skb, &(hdr.hop_limit))) 868 if (lowpan_fetch_skb_u8(skb, &(hdr.hop_limit)))
869 goto drop; 869 goto drop;
870 } 870 }
871 871
872 /* Extract SAM to the tmp variable */ 872 /* Extract SAM to the tmp variable */
873 tmp = ((iphc1 & LOWPAN_IPHC_SAM) >> LOWPAN_IPHC_SAM_BIT) & 0x03; 873 tmp = ((iphc1 & LOWPAN_IPHC_SAM) >> LOWPAN_IPHC_SAM_BIT) & 0x03;
874 874
875 /* Source address uncompression */ 875 /* Source address uncompression */
876 pr_debug("source address stateless compression\n"); 876 pr_debug("source address stateless compression\n");
877 err = lowpan_uncompress_addr(skb, &hdr.saddr, lowpan_llprefix, 877 err = lowpan_uncompress_addr(skb, &hdr.saddr, lowpan_llprefix,
878 lowpan_unc_llconf[tmp], skb->data); 878 lowpan_unc_llconf[tmp], skb->data);
879 if (err) 879 if (err)
880 goto drop; 880 goto drop;
881 881
882 /* Extract DAM to the tmp variable */ 882 /* Extract DAM to the tmp variable */
883 tmp = ((iphc1 & LOWPAN_IPHC_DAM_11) >> LOWPAN_IPHC_DAM_BIT) & 0x03; 883 tmp = ((iphc1 & LOWPAN_IPHC_DAM_11) >> LOWPAN_IPHC_DAM_BIT) & 0x03;
884 884
885 /* check for Multicast Compression */ 885 /* check for Multicast Compression */
886 if (iphc1 & LOWPAN_IPHC_M) { 886 if (iphc1 & LOWPAN_IPHC_M) {
887 if (iphc1 & LOWPAN_IPHC_DAC) { 887 if (iphc1 & LOWPAN_IPHC_DAC) {
888 pr_debug("dest: context-based mcast compression\n"); 888 pr_debug("dest: context-based mcast compression\n");
889 /* TODO: implement this */ 889 /* TODO: implement this */
890 } else { 890 } else {
891 u8 prefix[] = {0xff, 0x02}; 891 u8 prefix[] = {0xff, 0x02};
892 892
893 pr_debug("dest: non context-based mcast compression\n"); 893 pr_debug("dest: non context-based mcast compression\n");
894 if (0 < tmp && tmp < 3) { 894 if (0 < tmp && tmp < 3) {
895 if (lowpan_fetch_skb_u8(skb, &prefix[1])) 895 if (lowpan_fetch_skb_u8(skb, &prefix[1]))
896 goto drop; 896 goto drop;
897 } 897 }
898 898
899 err = lowpan_uncompress_addr(skb, &hdr.daddr, prefix, 899 err = lowpan_uncompress_addr(skb, &hdr.daddr, prefix,
900 lowpan_unc_mxconf[tmp], NULL); 900 lowpan_unc_mxconf[tmp], NULL);
901 if (err) 901 if (err)
902 goto drop; 902 goto drop;
903 } 903 }
904 } else { 904 } else {
905 pr_debug("dest: stateless compression\n"); 905 pr_debug("dest: stateless compression\n");
906 err = lowpan_uncompress_addr(skb, &hdr.daddr, lowpan_llprefix, 906 err = lowpan_uncompress_addr(skb, &hdr.daddr, lowpan_llprefix,
907 lowpan_unc_llconf[tmp], skb->data); 907 lowpan_unc_llconf[tmp], skb->data);
908 if (err) 908 if (err)
909 goto drop; 909 goto drop;
910 } 910 }
911 911
912 /* UDP data uncompression */ 912 /* UDP data uncompression */
913 if (iphc0 & LOWPAN_IPHC_NH_C) 913 if (iphc0 & LOWPAN_IPHC_NH_C)
914 if (lowpan_uncompress_udp_header(skb)) 914 if (lowpan_uncompress_udp_header(skb))
915 goto drop; 915 goto drop;
916 916
917 /* Not fragmented package */ 917 /* Not fragmented package */
918 hdr.payload_len = htons(skb->len); 918 hdr.payload_len = htons(skb->len);
919 919
920 pr_debug("skb headroom size = %d, data length = %d\n", 920 pr_debug("skb headroom size = %d, data length = %d\n",
921 skb_headroom(skb), skb->len); 921 skb_headroom(skb), skb->len);
922 922
923 pr_debug("IPv6 header dump:\n\tversion = %d\n\tlength = %d\n\t" 923 pr_debug("IPv6 header dump:\n\tversion = %d\n\tlength = %d\n\t"
924 "nexthdr = 0x%02x\n\thop_lim = %d\n", hdr.version, 924 "nexthdr = 0x%02x\n\thop_lim = %d\n", hdr.version,
925 ntohs(hdr.payload_len), hdr.nexthdr, hdr.hop_limit); 925 ntohs(hdr.payload_len), hdr.nexthdr, hdr.hop_limit);
926 926
927 lowpan_raw_dump_table(__func__, "raw header dump", (u8 *)&hdr, 927 lowpan_raw_dump_table(__func__, "raw header dump", (u8 *)&hdr,
928 sizeof(hdr)); 928 sizeof(hdr));
929 return lowpan_skb_deliver(skb, &hdr); 929 return lowpan_skb_deliver(skb, &hdr);
930 930
931 unlock_and_drop: 931 unlock_and_drop:
932 spin_unlock(&flist_lock); 932 spin_unlock(&flist_lock);
933 drop: 933 drop:
934 kfree_skb(skb); 934 kfree_skb(skb);
935 return -EINVAL; 935 return -EINVAL;
936 } 936 }
937 937
938 static int lowpan_set_address(struct net_device *dev, void *p) 938 static int lowpan_set_address(struct net_device *dev, void *p)
939 { 939 {
940 struct sockaddr *sa = p; 940 struct sockaddr *sa = p;
941 941
942 if (netif_running(dev)) 942 if (netif_running(dev))
943 return -EBUSY; 943 return -EBUSY;
944 944
945 /* TODO: validate addr */ 945 /* TODO: validate addr */
946 memcpy(dev->dev_addr, sa->sa_data, dev->addr_len); 946 memcpy(dev->dev_addr, sa->sa_data, dev->addr_len);
947 947
948 return 0; 948 return 0;
949 } 949 }
950 950
951 static int lowpan_get_mac_header_length(struct sk_buff *skb) 951 static int lowpan_get_mac_header_length(struct sk_buff *skb)
952 { 952 {
953 /* 953 /*
954 * Currently long addressing mode is supported only, so the overall 954 * Currently long addressing mode is supported only, so the overall
955 * header size is 21: 955 * header size is 21:
956 * FC SeqNum DPAN DA SA Sec 956 * FC SeqNum DPAN DA SA Sec
957 * 2 + 1 + 2 + 8 + 8 + 0 = 21 957 * 2 + 1 + 2 + 8 + 8 + 0 = 21
958 */ 958 */
959 return 21; 959 return 21;
960 } 960 }
961 961
962 static int 962 static int
963 lowpan_fragment_xmit(struct sk_buff *skb, u8 *head, 963 lowpan_fragment_xmit(struct sk_buff *skb, u8 *head,
964 int mlen, int plen, int offset) 964 int mlen, int plen, int offset)
965 { 965 {
966 struct sk_buff *frag; 966 struct sk_buff *frag;
967 int hlen, ret; 967 int hlen, ret;
968 968
969 /* if payload length is zero, therefore it's a first fragment */ 969 /* if payload length is zero, therefore it's a first fragment */
970 hlen = (plen == 0 ? LOWPAN_FRAG1_HEAD_SIZE : LOWPAN_FRAGN_HEAD_SIZE); 970 hlen = (plen == 0 ? LOWPAN_FRAG1_HEAD_SIZE : LOWPAN_FRAGN_HEAD_SIZE);
971 971
972 lowpan_raw_dump_inline(__func__, "6lowpan fragment header", head, hlen); 972 lowpan_raw_dump_inline(__func__, "6lowpan fragment header", head, hlen);
973 973
974 frag = dev_alloc_skb(hlen + mlen + plen + IEEE802154_MFR_SIZE); 974 frag = dev_alloc_skb(hlen + mlen + plen + IEEE802154_MFR_SIZE);
975 if (!frag) 975 if (!frag)
976 return -ENOMEM; 976 return -ENOMEM;
977 977
978 frag->priority = skb->priority; 978 frag->priority = skb->priority;
979 frag->dev = skb->dev; 979 frag->dev = skb->dev;
980 980
981 /* copy header, MFR and payload */ 981 /* copy header, MFR and payload */
982 memcpy(skb_put(frag, mlen), skb->data, mlen); 982 memcpy(skb_put(frag, mlen), skb->data, mlen);
983 memcpy(skb_put(frag, hlen), head, hlen); 983 memcpy(skb_put(frag, hlen), head, hlen);
984 984
985 if (plen) 985 if (plen)
986 skb_copy_from_linear_data_offset(skb, offset + mlen, 986 skb_copy_from_linear_data_offset(skb, offset + mlen,
987 skb_put(frag, plen), plen); 987 skb_put(frag, plen), plen);
988 988
989 lowpan_raw_dump_table(__func__, " raw fragment dump", frag->data, 989 lowpan_raw_dump_table(__func__, " raw fragment dump", frag->data,
990 frag->len); 990 frag->len);
991 991
992 ret = dev_queue_xmit(frag); 992 ret = dev_queue_xmit(frag);
993 993
994 return ret; 994 return ret;
995 } 995 }
996 996
997 static int 997 static int
998 lowpan_skb_fragmentation(struct sk_buff *skb) 998 lowpan_skb_fragmentation(struct sk_buff *skb)
999 { 999 {
1000 int err, header_length, payload_length, tag, offset = 0; 1000 int err, header_length, payload_length, tag, offset = 0;
1001 u8 head[5]; 1001 u8 head[5];
1002 1002
1003 header_length = lowpan_get_mac_header_length(skb); 1003 header_length = lowpan_get_mac_header_length(skb);
1004 payload_length = skb->len - header_length; 1004 payload_length = skb->len - header_length;
1005 tag = fragment_tag++; 1005 tag = fragment_tag++;
1006 1006
1007 /* first fragment header */ 1007 /* first fragment header */
1008 head[0] = LOWPAN_DISPATCH_FRAG1 | (payload_length & 0x7); 1008 head[0] = LOWPAN_DISPATCH_FRAG1 | (payload_length & 0x7);
1009 head[1] = (payload_length >> 3) & 0xff; 1009 head[1] = (payload_length >> 3) & 0xff;
1010 head[2] = tag & 0xff; 1010 head[2] = tag & 0xff;
1011 head[3] = tag >> 8; 1011 head[3] = tag >> 8;
1012 1012
1013 err = lowpan_fragment_xmit(skb, head, header_length, 0, 0); 1013 err = lowpan_fragment_xmit(skb, head, header_length, 0, 0);
1014 1014
1015 /* next fragment header */ 1015 /* next fragment header */
1016 head[0] &= ~LOWPAN_DISPATCH_FRAG1; 1016 head[0] &= ~LOWPAN_DISPATCH_FRAG1;
1017 head[0] |= LOWPAN_DISPATCH_FRAGN; 1017 head[0] |= LOWPAN_DISPATCH_FRAGN;
1018 1018
1019 while ((payload_length - offset > 0) && (err >= 0)) { 1019 while ((payload_length - offset > 0) && (err >= 0)) {
1020 int len = LOWPAN_FRAG_SIZE; 1020 int len = LOWPAN_FRAG_SIZE;
1021 1021
1022 head[4] = offset / 8; 1022 head[4] = offset / 8;
1023 1023
1024 if (payload_length - offset < len) 1024 if (payload_length - offset < len)
1025 len = payload_length - offset; 1025 len = payload_length - offset;
1026 1026
1027 err = lowpan_fragment_xmit(skb, head, header_length, 1027 err = lowpan_fragment_xmit(skb, head, header_length,
1028 len, offset); 1028 len, offset);
1029 offset += len; 1029 offset += len;
1030 } 1030 }
1031 1031
1032 return err; 1032 return err;
1033 } 1033 }
1034 1034
1035 static netdev_tx_t lowpan_xmit(struct sk_buff *skb, struct net_device *dev) 1035 static netdev_tx_t lowpan_xmit(struct sk_buff *skb, struct net_device *dev)
1036 { 1036 {
1037 int err = -1; 1037 int err = -1;
1038 1038
1039 pr_debug("package xmit\n"); 1039 pr_debug("package xmit\n");
1040 1040
1041 skb->dev = lowpan_dev_info(dev)->real_dev; 1041 skb->dev = lowpan_dev_info(dev)->real_dev;
1042 if (skb->dev == NULL) { 1042 if (skb->dev == NULL) {
1043 pr_debug("ERROR: no real wpan device found\n"); 1043 pr_debug("ERROR: no real wpan device found\n");
1044 goto error; 1044 goto error;
1045 } 1045 }
1046 1046
1047 if (skb->len <= IEEE802154_MTU) { 1047 if (skb->len <= IEEE802154_MTU) {
1048 err = dev_queue_xmit(skb); 1048 err = dev_queue_xmit(skb);
1049 goto out; 1049 goto out;
1050 } 1050 }
1051 1051
1052 pr_debug("frame is too big, fragmentation is needed\n"); 1052 pr_debug("frame is too big, fragmentation is needed\n");
1053 err = lowpan_skb_fragmentation(skb); 1053 err = lowpan_skb_fragmentation(skb);
1054 error: 1054 error:
1055 dev_kfree_skb(skb); 1055 dev_kfree_skb(skb);
1056 out: 1056 out:
1057 if (err < 0) 1057 if (err < 0)
1058 pr_debug("ERROR: xmit failed\n"); 1058 pr_debug("ERROR: xmit failed\n");
1059 1059
1060 return (err < 0 ? NETDEV_TX_BUSY : NETDEV_TX_OK); 1060 return (err < 0 ? NETDEV_TX_BUSY : NETDEV_TX_OK);
1061 } 1061 }
1062 1062
1063 static void lowpan_dev_free(struct net_device *dev) 1063 static void lowpan_dev_free(struct net_device *dev)
1064 { 1064 {
1065 dev_put(lowpan_dev_info(dev)->real_dev); 1065 dev_put(lowpan_dev_info(dev)->real_dev);
1066 free_netdev(dev); 1066 free_netdev(dev);
1067 } 1067 }
1068 1068
1069 static struct wpan_phy *lowpan_get_phy(const struct net_device *dev) 1069 static struct wpan_phy *lowpan_get_phy(const struct net_device *dev)
1070 { 1070 {
1071 struct net_device *real_dev = lowpan_dev_info(dev)->real_dev; 1071 struct net_device *real_dev = lowpan_dev_info(dev)->real_dev;
1072 return ieee802154_mlme_ops(real_dev)->get_phy(real_dev); 1072 return ieee802154_mlme_ops(real_dev)->get_phy(real_dev);
1073 } 1073 }
1074 1074
1075 static u16 lowpan_get_pan_id(const struct net_device *dev) 1075 static u16 lowpan_get_pan_id(const struct net_device *dev)
1076 { 1076 {
1077 struct net_device *real_dev = lowpan_dev_info(dev)->real_dev; 1077 struct net_device *real_dev = lowpan_dev_info(dev)->real_dev;
1078 return ieee802154_mlme_ops(real_dev)->get_pan_id(real_dev); 1078 return ieee802154_mlme_ops(real_dev)->get_pan_id(real_dev);
1079 } 1079 }
1080 1080
1081 static u16 lowpan_get_short_addr(const struct net_device *dev) 1081 static u16 lowpan_get_short_addr(const struct net_device *dev)
1082 { 1082 {
1083 struct net_device *real_dev = lowpan_dev_info(dev)->real_dev; 1083 struct net_device *real_dev = lowpan_dev_info(dev)->real_dev;
1084 return ieee802154_mlme_ops(real_dev)->get_short_addr(real_dev); 1084 return ieee802154_mlme_ops(real_dev)->get_short_addr(real_dev);
1085 } 1085 }
1086 1086
1087 static struct header_ops lowpan_header_ops = { 1087 static struct header_ops lowpan_header_ops = {
1088 .create = lowpan_header_create, 1088 .create = lowpan_header_create,
1089 }; 1089 };
1090 1090
1091 static const struct net_device_ops lowpan_netdev_ops = { 1091 static const struct net_device_ops lowpan_netdev_ops = {
1092 .ndo_start_xmit = lowpan_xmit, 1092 .ndo_start_xmit = lowpan_xmit,
1093 .ndo_set_mac_address = lowpan_set_address, 1093 .ndo_set_mac_address = lowpan_set_address,
1094 }; 1094 };
1095 1095
1096 static struct ieee802154_mlme_ops lowpan_mlme = { 1096 static struct ieee802154_mlme_ops lowpan_mlme = {
1097 .get_pan_id = lowpan_get_pan_id, 1097 .get_pan_id = lowpan_get_pan_id,
1098 .get_phy = lowpan_get_phy, 1098 .get_phy = lowpan_get_phy,
1099 .get_short_addr = lowpan_get_short_addr, 1099 .get_short_addr = lowpan_get_short_addr,
1100 }; 1100 };
1101 1101
1102 static void lowpan_setup(struct net_device *dev) 1102 static void lowpan_setup(struct net_device *dev)
1103 { 1103 {
1104 dev->addr_len = IEEE802154_ADDR_LEN; 1104 dev->addr_len = IEEE802154_ADDR_LEN;
1105 memset(dev->broadcast, 0xff, IEEE802154_ADDR_LEN); 1105 memset(dev->broadcast, 0xff, IEEE802154_ADDR_LEN);
1106 dev->type = ARPHRD_IEEE802154; 1106 dev->type = ARPHRD_IEEE802154;
1107 /* Frame Control + Sequence Number + Address fields + Security Header */ 1107 /* Frame Control + Sequence Number + Address fields + Security Header */
1108 dev->hard_header_len = 2 + 1 + 20 + 14; 1108 dev->hard_header_len = 2 + 1 + 20 + 14;
1109 dev->needed_tailroom = 2; /* FCS */ 1109 dev->needed_tailroom = 2; /* FCS */
1110 dev->mtu = 1281; 1110 dev->mtu = 1281;
1111 dev->tx_queue_len = 0; 1111 dev->tx_queue_len = 0;
1112 dev->flags = IFF_BROADCAST | IFF_MULTICAST; 1112 dev->flags = IFF_BROADCAST | IFF_MULTICAST;
1113 dev->watchdog_timeo = 0; 1113 dev->watchdog_timeo = 0;
1114 1114
1115 dev->netdev_ops = &lowpan_netdev_ops; 1115 dev->netdev_ops = &lowpan_netdev_ops;
1116 dev->header_ops = &lowpan_header_ops; 1116 dev->header_ops = &lowpan_header_ops;
1117 dev->ml_priv = &lowpan_mlme; 1117 dev->ml_priv = &lowpan_mlme;
1118 dev->destructor = lowpan_dev_free; 1118 dev->destructor = lowpan_dev_free;
1119 } 1119 }
1120 1120
1121 static int lowpan_validate(struct nlattr *tb[], struct nlattr *data[]) 1121 static int lowpan_validate(struct nlattr *tb[], struct nlattr *data[])
1122 { 1122 {
1123 if (tb[IFLA_ADDRESS]) { 1123 if (tb[IFLA_ADDRESS]) {
1124 if (nla_len(tb[IFLA_ADDRESS]) != IEEE802154_ADDR_LEN) 1124 if (nla_len(tb[IFLA_ADDRESS]) != IEEE802154_ADDR_LEN)
1125 return -EINVAL; 1125 return -EINVAL;
1126 } 1126 }
1127 return 0; 1127 return 0;
1128 } 1128 }
1129 1129
1130 static int lowpan_rcv(struct sk_buff *skb, struct net_device *dev, 1130 static int lowpan_rcv(struct sk_buff *skb, struct net_device *dev,
1131 struct packet_type *pt, struct net_device *orig_dev) 1131 struct packet_type *pt, struct net_device *orig_dev)
1132 { 1132 {
1133 if (!netif_running(dev)) 1133 if (!netif_running(dev))
1134 goto drop; 1134 goto drop;
1135 1135
1136 if (dev->type != ARPHRD_IEEE802154) 1136 if (dev->type != ARPHRD_IEEE802154)
1137 goto drop; 1137 goto drop;
1138 1138
1139 /* check that it's our buffer */ 1139 /* check that it's our buffer */
1140 switch (skb->data[0] & 0xe0) { 1140 switch (skb->data[0] & 0xe0) {
1141 case LOWPAN_DISPATCH_IPHC: /* ipv6 datagram */ 1141 case LOWPAN_DISPATCH_IPHC: /* ipv6 datagram */
1142 case LOWPAN_DISPATCH_FRAG1: /* first fragment header */ 1142 case LOWPAN_DISPATCH_FRAG1: /* first fragment header */
1143 case LOWPAN_DISPATCH_FRAGN: /* next fragments headers */ 1143 case LOWPAN_DISPATCH_FRAGN: /* next fragments headers */
1144 lowpan_process_data(skb); 1144 lowpan_process_data(skb);
1145 break; 1145 break;
1146 default: 1146 default:
1147 break; 1147 break;
1148 } 1148 }
1149 1149
1150 return NET_RX_SUCCESS; 1150 return NET_RX_SUCCESS;
1151 1151
1152 drop: 1152 drop:
1153 kfree_skb(skb); 1153 kfree_skb(skb);
1154 return NET_RX_DROP; 1154 return NET_RX_DROP;
1155 } 1155 }
1156 1156
1157 static int lowpan_newlink(struct net *src_net, struct net_device *dev, 1157 static int lowpan_newlink(struct net *src_net, struct net_device *dev,
1158 struct nlattr *tb[], struct nlattr *data[]) 1158 struct nlattr *tb[], struct nlattr *data[])
1159 { 1159 {
1160 struct net_device *real_dev; 1160 struct net_device *real_dev;
1161 struct lowpan_dev_record *entry; 1161 struct lowpan_dev_record *entry;
1162 1162
1163 pr_debug("adding new link\n"); 1163 pr_debug("adding new link\n");
1164 1164
1165 if (!tb[IFLA_LINK]) 1165 if (!tb[IFLA_LINK])
1166 return -EINVAL; 1166 return -EINVAL;
1167 /* find and hold real wpan device */ 1167 /* find and hold real wpan device */
1168 real_dev = dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK])); 1168 real_dev = dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK]));
1169 if (!real_dev) 1169 if (!real_dev)
1170 return -ENODEV; 1170 return -ENODEV;
1171 1171
1172 lowpan_dev_info(dev)->real_dev = real_dev; 1172 lowpan_dev_info(dev)->real_dev = real_dev;
1173 mutex_init(&lowpan_dev_info(dev)->dev_list_mtx); 1173 mutex_init(&lowpan_dev_info(dev)->dev_list_mtx);
1174 1174
1175 entry = kzalloc(sizeof(struct lowpan_dev_record), GFP_KERNEL); 1175 entry = kzalloc(sizeof(struct lowpan_dev_record), GFP_KERNEL);
1176 if (!entry) { 1176 if (!entry) {
1177 dev_put(real_dev); 1177 dev_put(real_dev);
1178 lowpan_dev_info(dev)->real_dev = NULL; 1178 lowpan_dev_info(dev)->real_dev = NULL;
1179 return -ENOMEM; 1179 return -ENOMEM;
1180 } 1180 }
1181 1181
1182 entry->ldev = dev; 1182 entry->ldev = dev;
1183 1183
1184 mutex_lock(&lowpan_dev_info(dev)->dev_list_mtx); 1184 mutex_lock(&lowpan_dev_info(dev)->dev_list_mtx);
1185 INIT_LIST_HEAD(&entry->list); 1185 INIT_LIST_HEAD(&entry->list);
1186 list_add_tail(&entry->list, &lowpan_devices); 1186 list_add_tail(&entry->list, &lowpan_devices);
1187 mutex_unlock(&lowpan_dev_info(dev)->dev_list_mtx); 1187 mutex_unlock(&lowpan_dev_info(dev)->dev_list_mtx);
1188 1188
1189 register_netdevice(dev); 1189 register_netdevice(dev);
1190 1190
1191 return 0; 1191 return 0;
1192 } 1192 }
1193 1193
1194 static void lowpan_dellink(struct net_device *dev, struct list_head *head) 1194 static void lowpan_dellink(struct net_device *dev, struct list_head *head)
1195 { 1195 {
1196 struct lowpan_dev_info *lowpan_dev = lowpan_dev_info(dev); 1196 struct lowpan_dev_info *lowpan_dev = lowpan_dev_info(dev);
1197 struct net_device *real_dev = lowpan_dev->real_dev; 1197 struct net_device *real_dev = lowpan_dev->real_dev;
1198 struct lowpan_dev_record *entry, *tmp; 1198 struct lowpan_dev_record *entry, *tmp;
1199 struct lowpan_fragment *frame, *tframe; 1199 struct lowpan_fragment *frame, *tframe;
1200 1200
1201 ASSERT_RTNL(); 1201 ASSERT_RTNL();
1202 1202
1203 spin_lock(&flist_lock); 1203 spin_lock(&flist_lock);
1204 list_for_each_entry_safe(frame, tframe, &lowpan_fragments, list) { 1204 list_for_each_entry_safe(frame, tframe, &lowpan_fragments, list) {
1205 del_timer(&frame->timer); 1205 del_timer(&frame->timer);
1206 list_del(&frame->list); 1206 list_del(&frame->list);
1207 dev_kfree_skb(frame->skb); 1207 dev_kfree_skb(frame->skb);
1208 kfree(frame); 1208 kfree(frame);
1209 } 1209 }
1210 spin_unlock(&flist_lock); 1210 spin_unlock(&flist_lock);
1211 1211
1212 mutex_lock(&lowpan_dev_info(dev)->dev_list_mtx); 1212 mutex_lock(&lowpan_dev_info(dev)->dev_list_mtx);
1213 list_for_each_entry_safe(entry, tmp, &lowpan_devices, list) { 1213 list_for_each_entry_safe(entry, tmp, &lowpan_devices, list) {
1214 if (entry->ldev == dev) { 1214 if (entry->ldev == dev) {
1215 list_del(&entry->list); 1215 list_del(&entry->list);
1216 kfree(entry); 1216 kfree(entry);
1217 } 1217 }
1218 } 1218 }
1219 mutex_unlock(&lowpan_dev_info(dev)->dev_list_mtx); 1219 mutex_unlock(&lowpan_dev_info(dev)->dev_list_mtx);
1220 1220
1221 mutex_destroy(&lowpan_dev_info(dev)->dev_list_mtx); 1221 mutex_destroy(&lowpan_dev_info(dev)->dev_list_mtx);
1222 1222
1223 unregister_netdevice_queue(dev, head); 1223 unregister_netdevice_queue(dev, head);
1224 1224
1225 dev_put(real_dev); 1225 dev_put(real_dev);
1226 } 1226 }
1227 1227
1228 static struct rtnl_link_ops lowpan_link_ops __read_mostly = { 1228 static struct rtnl_link_ops lowpan_link_ops __read_mostly = {
1229 .kind = "lowpan", 1229 .kind = "lowpan",
1230 .priv_size = sizeof(struct lowpan_dev_info), 1230 .priv_size = sizeof(struct lowpan_dev_info),
1231 .setup = lowpan_setup, 1231 .setup = lowpan_setup,
1232 .newlink = lowpan_newlink, 1232 .newlink = lowpan_newlink,
1233 .dellink = lowpan_dellink, 1233 .dellink = lowpan_dellink,
1234 .validate = lowpan_validate, 1234 .validate = lowpan_validate,
1235 }; 1235 };
1236 1236
1237 static inline int __init lowpan_netlink_init(void) 1237 static inline int __init lowpan_netlink_init(void)
1238 { 1238 {
1239 return rtnl_link_register(&lowpan_link_ops); 1239 return rtnl_link_register(&lowpan_link_ops);
1240 } 1240 }
1241 1241
1242 static inline void __init lowpan_netlink_fini(void) 1242 static inline void __init lowpan_netlink_fini(void)
1243 { 1243 {
1244 rtnl_link_unregister(&lowpan_link_ops); 1244 rtnl_link_unregister(&lowpan_link_ops);
1245 } 1245 }
1246 1246
1247 static struct packet_type lowpan_packet_type = { 1247 static struct packet_type lowpan_packet_type = {
1248 .type = __constant_htons(ETH_P_IEEE802154), 1248 .type = __constant_htons(ETH_P_IEEE802154),
1249 .func = lowpan_rcv, 1249 .func = lowpan_rcv,
1250 }; 1250 };
1251 1251
1252 static int __init lowpan_init_module(void) 1252 static int __init lowpan_init_module(void)
1253 { 1253 {
1254 int err = 0; 1254 int err = 0;
1255 1255
1256 err = lowpan_netlink_init(); 1256 err = lowpan_netlink_init();
1257 if (err < 0) 1257 if (err < 0)
1258 goto out; 1258 goto out;
1259 1259
1260 dev_add_pack(&lowpan_packet_type); 1260 dev_add_pack(&lowpan_packet_type);
1261 out: 1261 out:
1262 return err; 1262 return err;
1263 } 1263 }
1264 1264
1265 static void __exit lowpan_cleanup_module(void) 1265 static void __exit lowpan_cleanup_module(void)
1266 { 1266 {
1267 lowpan_netlink_fini(); 1267 lowpan_netlink_fini();
1268 1268
1269 dev_remove_pack(&lowpan_packet_type); 1269 dev_remove_pack(&lowpan_packet_type);
1270 } 1270 }
1271 1271
1272 module_init(lowpan_init_module); 1272 module_init(lowpan_init_module);
1273 module_exit(lowpan_cleanup_module); 1273 module_exit(lowpan_cleanup_module);
1274 MODULE_LICENSE("GPL"); 1274 MODULE_LICENSE("GPL");
1275 MODULE_ALIAS_RTNL_LINK("lowpan"); 1275 MODULE_ALIAS_RTNL_LINK("lowpan");
1276 1276