2 * Copyright (C) 2007-2009 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"
26 #include "translation-table.h"
30 #include <linux/ethtool.h>
31 #include <linux/etherdevice.h>
34 static uint16_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
;
38 static int32_t lock_dropped
;
40 unsigned char mainIfAddr
[ETH_ALEN
];
41 static unsigned char mainIfAddr_default
[ETH_ALEN
];
42 static int bat_get_settings(struct net_device
*dev
, struct ethtool_cmd
*cmd
);
43 static void bat_get_drvinfo(struct net_device
*dev
,
44 struct ethtool_drvinfo
*info
);
45 static u32
bat_get_msglevel(struct net_device
*dev
);
46 static void bat_set_msglevel(struct net_device
*dev
, u32 value
);
47 static u32
bat_get_link(struct net_device
*dev
);
48 static u32
bat_get_rx_csum(struct net_device
*dev
);
49 static int bat_set_rx_csum(struct net_device
*dev
, u32 data
);
51 static const struct ethtool_ops bat_ethtool_ops
= {
52 .get_settings
= bat_get_settings
,
53 .get_drvinfo
= bat_get_drvinfo
,
54 .get_msglevel
= bat_get_msglevel
,
55 .set_msglevel
= bat_set_msglevel
,
56 .get_link
= bat_get_link
,
57 .get_rx_csum
= bat_get_rx_csum
,
58 .set_rx_csum
= bat_set_rx_csum
61 void set_main_if_addr(uint8_t *addr
)
63 memcpy(mainIfAddr
, addr
, ETH_ALEN
);
66 int main_if_was_up(void)
68 return (memcmp(mainIfAddr
, mainIfAddr_default
, ETH_ALEN
) != 0 ? 1 : 0);
71 static int my_skb_push(struct sk_buff
*skb
, unsigned int len
)
76 if (skb
->data
- len
< skb
->head
) {
78 result
= pskb_expand_head(skb
, len
, 0, GFP_ATOMIC
);
88 #ifdef HAVE_NET_DEVICE_OPS
89 static const struct net_device_ops bat_netdev_ops
= {
90 .ndo_open
= interface_open
,
91 .ndo_stop
= interface_release
,
92 .ndo_get_stats
= interface_stats
,
93 .ndo_set_mac_address
= interface_set_mac_addr
,
94 .ndo_change_mtu
= interface_change_mtu
,
95 .ndo_start_xmit
= interface_tx
,
96 .ndo_validate_addr
= eth_validate_addr
100 void interface_setup(struct net_device
*dev
)
102 struct bat_priv
*priv
= netdev_priv(dev
);
103 char dev_addr
[ETH_ALEN
];
107 #ifdef HAVE_NET_DEVICE_OPS
108 dev
->netdev_ops
= &bat_netdev_ops
;
110 dev
->open
= interface_open
;
111 dev
->stop
= interface_release
;
112 dev
->get_stats
= interface_stats
;
113 dev
->set_mac_address
= interface_set_mac_addr
;
114 dev
->change_mtu
= interface_change_mtu
;
115 dev
->hard_start_xmit
= interface_tx
;
117 dev
->destructor
= free_netdev
;
119 dev
->mtu
= hardif_min_mtu();
120 dev
->hard_header_len
= BAT_HEADER_LEN
; /* reserve more space in the
121 * skbuff for our header */
123 /* generate random address */
124 random_ether_addr(dev_addr
);
125 memcpy(dev
->dev_addr
, dev_addr
, sizeof(dev
->dev_addr
));
127 SET_ETHTOOL_OPS(dev
, &bat_ethtool_ops
);
129 memset(priv
, 0, sizeof(struct bat_priv
));
132 int interface_open(struct net_device
*dev
)
134 netif_start_queue(dev
);
138 int interface_release(struct net_device
*dev
)
140 netif_stop_queue(dev
);
144 struct net_device_stats
*interface_stats(struct net_device
*dev
)
146 struct bat_priv
*priv
= netdev_priv(dev
);
150 int interface_set_mac_addr(struct net_device
*dev
, void *addr
)
155 int interface_change_mtu(struct net_device
*dev
, int new_mtu
)
158 if ((new_mtu
< 68) || (new_mtu
> hardif_min_mtu()))
166 int interface_tx(struct sk_buff
*skb
, struct net_device
*dev
)
168 struct unicast_packet
*unicast_packet
;
169 struct bcast_packet
*bcast_packet
;
170 struct orig_node
*orig_node
;
171 struct ethhdr
*ethhdr
= (struct ethhdr
*)skb
->data
;
172 struct bat_priv
*priv
= netdev_priv(dev
);
173 int data_len
= skb
->len
;
175 if (atomic_read(&module_state
) != MODULE_ACTIVE
)
178 dev
->trans_start
= jiffies
;
179 /* TODO: check this for locks */
180 hna_local_add(ethhdr
->h_source
);
182 /* ethernet packet should be broadcasted */
183 if (is_bcast(ethhdr
->h_dest
) || is_mcast(ethhdr
->h_dest
)) {
185 if (my_skb_push(skb
, sizeof(struct bcast_packet
)) < 0)
188 bcast_packet
= (struct bcast_packet
*)skb
->data
;
190 bcast_packet
->version
= COMPAT_VERSION
;
192 /* batman packet type: broadcast */
193 bcast_packet
->packet_type
= BAT_BCAST
;
195 /* hw address of first interface is the orig mac because only
196 * this mac is known throughout the mesh */
197 memcpy(bcast_packet
->orig
, mainIfAddr
, ETH_ALEN
);
198 /* set broadcast sequence number */
199 bcast_packet
->seqno
= htons(bcast_seqno
);
203 /* broadcast packet */
204 add_bcast_packet_to_list(skb
->data
, skb
->len
);
209 /* simply spin_lock()ing can deadlock when the lock is already
211 /* TODO: defer the work in a working queue instead of
213 if (!spin_trylock(&orig_hash_lock
)) {
215 debug_log(LOG_TYPE_NOTICE
, "%d packets dropped because lock was hold\n", lock_dropped
);
219 /* get routing information */
220 orig_node
= ((struct orig_node
*)hash_find(orig_hash
,
223 /* check for hna host */
225 orig_node
= transtable_search(ethhdr
->h_dest
);
228 (orig_node
->batman_if
) &&
229 (orig_node
->router
)) {
230 if (my_skb_push(skb
, sizeof(struct unicast_packet
)) < 0)
233 unicast_packet
= (struct unicast_packet
*)skb
->data
;
235 unicast_packet
->version
= COMPAT_VERSION
;
236 /* batman packet type: unicast */
237 unicast_packet
->packet_type
= BAT_UNICAST
;
238 /* set unicast ttl */
239 unicast_packet
->ttl
= TTL
;
240 /* copy the destination for faster routing */
241 memcpy(unicast_packet
->dest
, orig_node
->orig
, ETH_ALEN
);
243 /* net_dev won't be available when not active */
244 if (orig_node
->batman_if
->if_active
!= IF_ACTIVE
)
247 send_raw_packet(skb
->data
, skb
->len
,
248 orig_node
->batman_if
,
249 orig_node
->router
->addr
);
254 spin_unlock(&orig_hash_lock
);
257 priv
->stats
.tx_packets
++;
258 priv
->stats
.tx_bytes
+= data_len
;
262 spin_unlock(&orig_hash_lock
);
264 priv
->stats
.tx_dropped
++;
270 void interface_rx(struct net_device
*dev
, void *packet
, int packet_len
)
273 struct bat_priv
*priv
= netdev_priv(dev
);
275 skb
= dev_alloc_skb(packet_len
);
278 priv
->stats
.rx_dropped
++;
282 memcpy(skb_put(skb
, packet_len
), packet
, packet_len
);
284 /* Write metadata, and then pass to the receive level */
286 skb
->protocol
= eth_type_trans(skb
, dev
);
287 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
289 priv
->stats
.rx_packets
++;
290 priv
->stats
.rx_bytes
+= packet_len
;
292 dev
->last_rx
= jiffies
;
301 static int bat_get_settings(struct net_device
*dev
, struct ethtool_cmd
*cmd
)
304 cmd
->advertising
= 0;
305 cmd
->speed
= SPEED_10
;
306 cmd
->duplex
= DUPLEX_FULL
;
308 cmd
->phy_address
= 0;
309 cmd
->transceiver
= XCVR_INTERNAL
;
310 cmd
->autoneg
= AUTONEG_DISABLE
;
317 static void bat_get_drvinfo(struct net_device
*dev
,
318 struct ethtool_drvinfo
*info
)
320 strcpy(info
->driver
, "B.A.T.M.A.N. advanced");
321 strcpy(info
->version
, SOURCE_VERSION
);
322 strcpy(info
->fw_version
, "N/A");
323 strcpy(info
->bus_info
, "batman");
326 static u32
bat_get_msglevel(struct net_device
*dev
)
331 static void bat_set_msglevel(struct net_device
*dev
, u32 value
)
336 static u32
bat_get_link(struct net_device
*dev
)
341 static u32
bat_get_rx_csum(struct net_device
*dev
)
346 static int bat_set_rx_csum(struct net_device
*dev
, u32 data
)