2 * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
4 * Marek Lindner, Simon Wunderlich
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of version 2 of the GNU General Public
8 * License as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
23 #include "soft-interface.h"
24 #include "hard-interface.h"
27 #include "translation-table.h"
30 #include <linux/slab.h>
31 #include <linux/ethtool.h>
32 #include <linux/etherdevice.h>
34 static uint32_t bcast_seqno
= 1; /* give own bcast messages seq numbers to avoid
36 static int32_t skb_packets
;
37 static int32_t skb_bad_packets
;
39 unsigned char main_if_addr
[ETH_ALEN
];
40 static int bat_get_settings(struct net_device
*dev
, struct ethtool_cmd
*cmd
);
41 static void bat_get_drvinfo(struct net_device
*dev
,
42 struct ethtool_drvinfo
*info
);
43 static u32
bat_get_msglevel(struct net_device
*dev
);
44 static void bat_set_msglevel(struct net_device
*dev
, u32 value
);
45 static u32
bat_get_link(struct net_device
*dev
);
46 static u32
bat_get_rx_csum(struct net_device
*dev
);
47 static int bat_set_rx_csum(struct net_device
*dev
, u32 data
);
49 static const struct ethtool_ops bat_ethtool_ops
= {
50 .get_settings
= bat_get_settings
,
51 .get_drvinfo
= bat_get_drvinfo
,
52 .get_msglevel
= bat_get_msglevel
,
53 .set_msglevel
= bat_set_msglevel
,
54 .get_link
= bat_get_link
,
55 .get_rx_csum
= bat_get_rx_csum
,
56 .set_rx_csum
= bat_set_rx_csum
59 void set_main_if_addr(uint8_t *addr
)
61 memcpy(main_if_addr
, addr
, ETH_ALEN
);
64 int my_skb_push(struct sk_buff
*skb
, unsigned int len
)
69 if (skb_headroom(skb
) < len
) {
71 result
= pskb_expand_head(skb
, len
, 0, GFP_ATOMIC
);
81 static int interface_open(struct net_device
*dev
)
83 netif_start_queue(dev
);
87 static int interface_release(struct net_device
*dev
)
89 netif_stop_queue(dev
);
93 static struct net_device_stats
*interface_stats(struct net_device
*dev
)
95 struct bat_priv
*priv
= netdev_priv(dev
);
99 static int interface_set_mac_addr(struct net_device
*dev
, void *p
)
101 struct sockaddr
*addr
= p
;
103 if (!is_valid_ether_addr(addr
->sa_data
))
104 return -EADDRNOTAVAIL
;
106 /* only modify hna-table if it has been initialised before */
107 if (atomic_read(&module_state
) == MODULE_ACTIVE
) {
108 hna_local_remove(dev
->dev_addr
, "mac address changed");
109 hna_local_add(addr
->sa_data
);
112 memcpy(dev
->dev_addr
, addr
->sa_data
, ETH_ALEN
);
117 static int interface_change_mtu(struct net_device
*dev
, int new_mtu
)
120 if ((new_mtu
< 68) || (new_mtu
> hardif_min_mtu()))
128 int interface_tx(struct sk_buff
*skb
, struct net_device
*dev
)
130 struct unicast_packet
*unicast_packet
;
131 struct bcast_packet
*bcast_packet
;
132 struct orig_node
*orig_node
;
133 struct neigh_node
*router
;
134 struct ethhdr
*ethhdr
= (struct ethhdr
*)skb
->data
;
135 struct bat_priv
*priv
= netdev_priv(dev
);
136 struct batman_if
*batman_if
;
137 struct bat_priv
*bat_priv
;
139 int data_len
= skb
->len
;
142 if (atomic_read(&module_state
) != MODULE_ACTIVE
)
145 bat_priv
= netdev_priv(soft_device
);
147 dev
->trans_start
= jiffies
;
148 /* TODO: check this for locks */
149 hna_local_add(ethhdr
->h_source
);
151 /* ethernet packet should be broadcasted */
152 if (is_bcast(ethhdr
->h_dest
) || is_mcast(ethhdr
->h_dest
)) {
154 if (my_skb_push(skb
, sizeof(struct bcast_packet
)) < 0)
157 bcast_packet
= (struct bcast_packet
*)skb
->data
;
158 bcast_packet
->version
= COMPAT_VERSION
;
159 bcast_packet
->ttl
= TTL
;
161 /* batman packet type: broadcast */
162 bcast_packet
->packet_type
= BAT_BCAST
;
164 /* hw address of first interface is the orig mac because only
165 * this mac is known throughout the mesh */
166 memcpy(bcast_packet
->orig
, main_if_addr
, ETH_ALEN
);
168 /* set broadcast sequence number */
169 bcast_packet
->seqno
= htonl(bcast_seqno
);
171 /* broadcast packet. on success, increase seqno. */
172 if (add_bcast_packet_to_list(skb
) == NETDEV_TX_OK
)
175 /* a copy is stored in the bcast list, therefore removing
176 * the original skb. */
181 spin_lock_irqsave(&orig_hash_lock
, flags
);
182 /* get routing information */
183 orig_node
= ((struct orig_node
*)hash_find(orig_hash
,
186 /* check for hna host */
188 orig_node
= transtable_search(ethhdr
->h_dest
);
190 router
= find_router(orig_node
, NULL
);
195 /* don't lock while sending the packets ... we therefore
196 * copy the required data before sending */
198 batman_if
= router
->if_incoming
;
199 memcpy(dstaddr
, router
->addr
, ETH_ALEN
);
201 spin_unlock_irqrestore(&orig_hash_lock
, flags
);
203 if (batman_if
->if_status
!= IF_ACTIVE
)
206 if (my_skb_push(skb
, sizeof(struct unicast_packet
)) < 0)
209 unicast_packet
= (struct unicast_packet
*)skb
->data
;
211 unicast_packet
->version
= COMPAT_VERSION
;
212 /* batman packet type: unicast */
213 unicast_packet
->packet_type
= BAT_UNICAST
;
214 /* set unicast ttl */
215 unicast_packet
->ttl
= TTL
;
216 /* copy the destination for faster routing */
217 memcpy(unicast_packet
->dest
, orig_node
->orig
, ETH_ALEN
);
219 send_skb_packet(skb
, batman_if
, dstaddr
);
222 priv
->stats
.tx_packets
++;
223 priv
->stats
.tx_bytes
+= data_len
;
227 spin_unlock_irqrestore(&orig_hash_lock
, flags
);
229 priv
->stats
.tx_dropped
++;
235 void interface_rx(struct sk_buff
*skb
, int hdr_size
)
237 struct net_device
*dev
= soft_device
;
238 struct bat_priv
*priv
= netdev_priv(dev
);
240 /* check if enough space is available for pulling, and pull */
241 if (!pskb_may_pull(skb
, hdr_size
)) {
245 skb_pull_rcsum(skb
, hdr_size
);
246 /* skb_set_mac_header(skb, -sizeof(struct ethhdr));*/
248 if (unlikely(!pskb_may_pull(skb
, ETH_HLEN
))) {
253 skb
->protocol
= eth_type_trans(skb
, dev
);
255 /* should not be neccesary anymore as we use skb_pull_rcsum()
256 * TODO: please verify this and remove this TODO
257 * -- Dec 21st 2009, Simon Wunderlich */
259 /* skb->ip_summed = CHECKSUM_UNNECESSARY;*/
261 /* TODO: set skb->pkt_type to PACKET_BROADCAST, PACKET_MULTICAST,
262 * PACKET_OTHERHOST or PACKET_HOST */
264 priv
->stats
.rx_packets
++;
265 priv
->stats
.rx_bytes
+= skb
->len
;
267 dev
->last_rx
= jiffies
;
272 #ifdef HAVE_NET_DEVICE_OPS
273 static const struct net_device_ops bat_netdev_ops
= {
274 .ndo_open
= interface_open
,
275 .ndo_stop
= interface_release
,
276 .ndo_get_stats
= interface_stats
,
277 .ndo_set_mac_address
= interface_set_mac_addr
,
278 .ndo_change_mtu
= interface_change_mtu
,
279 .ndo_start_xmit
= interface_tx
,
280 .ndo_validate_addr
= eth_validate_addr
284 void interface_setup(struct net_device
*dev
)
286 struct bat_priv
*priv
= netdev_priv(dev
);
287 char dev_addr
[ETH_ALEN
];
291 #ifdef HAVE_NET_DEVICE_OPS
292 dev
->netdev_ops
= &bat_netdev_ops
;
294 dev
->open
= interface_open
;
295 dev
->stop
= interface_release
;
296 dev
->get_stats
= interface_stats
;
297 dev
->set_mac_address
= interface_set_mac_addr
;
298 dev
->change_mtu
= interface_change_mtu
;
299 dev
->hard_start_xmit
= interface_tx
;
301 dev
->destructor
= free_netdev
;
303 dev
->mtu
= hardif_min_mtu();
304 dev
->hard_header_len
= BAT_HEADER_LEN
; /* reserve more space in the
305 * skbuff for our header */
307 /* generate random address */
308 random_ether_addr(dev_addr
);
309 memcpy(dev
->dev_addr
, dev_addr
, ETH_ALEN
);
311 SET_ETHTOOL_OPS(dev
, &bat_ethtool_ops
);
313 memset(priv
, 0, sizeof(struct bat_priv
));
317 static int bat_get_settings(struct net_device
*dev
, struct ethtool_cmd
*cmd
)
320 cmd
->advertising
= 0;
321 cmd
->speed
= SPEED_10
;
322 cmd
->duplex
= DUPLEX_FULL
;
324 cmd
->phy_address
= 0;
325 cmd
->transceiver
= XCVR_INTERNAL
;
326 cmd
->autoneg
= AUTONEG_DISABLE
;
333 static void bat_get_drvinfo(struct net_device
*dev
,
334 struct ethtool_drvinfo
*info
)
336 strcpy(info
->driver
, "B.A.T.M.A.N. advanced");
337 strcpy(info
->version
, SOURCE_VERSION
);
338 strcpy(info
->fw_version
, "N/A");
339 strcpy(info
->bus_info
, "batman");
342 static u32
bat_get_msglevel(struct net_device
*dev
)
347 static void bat_set_msglevel(struct net_device
*dev
, u32 value
)
351 static u32
bat_get_link(struct net_device
*dev
)
356 static u32
bat_get_rx_csum(struct net_device
*dev
)
361 static int bat_set_rx_csum(struct net_device
*dev
, u32 data
)