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"
29 #include <linux/slab.h>
30 #include <linux/ethtool.h>
31 #include <linux/etherdevice.h>
33 static uint16_t bcast_seqno
= 1; /* give own bcast messages seq numbers to avoid
35 static int32_t skb_packets
;
36 static int32_t skb_bad_packets
;
38 unsigned char mainIfAddr
[ETH_ALEN
];
39 static unsigned char mainIfAddr_default
[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(mainIfAddr
, addr
, ETH_ALEN
);
64 int main_if_was_up(void)
66 return (memcmp(mainIfAddr
, mainIfAddr_default
, ETH_ALEN
) != 0 ? 1 : 0);
69 int my_skb_push(struct sk_buff
*skb
, unsigned int len
)
74 if (skb_headroom(skb
) < len
) {
76 result
= pskb_expand_head(skb
, len
, 0, GFP_ATOMIC
);
86 #ifdef HAVE_NET_DEVICE_OPS
87 static const struct net_device_ops bat_netdev_ops
= {
88 .ndo_open
= interface_open
,
89 .ndo_stop
= interface_release
,
90 .ndo_get_stats
= interface_stats
,
91 .ndo_set_mac_address
= interface_set_mac_addr
,
92 .ndo_change_mtu
= interface_change_mtu
,
93 .ndo_start_xmit
= interface_tx
,
94 .ndo_validate_addr
= eth_validate_addr
98 void interface_setup(struct net_device
*dev
)
100 struct bat_priv
*priv
= netdev_priv(dev
);
101 char dev_addr
[ETH_ALEN
];
105 #ifdef HAVE_NET_DEVICE_OPS
106 dev
->netdev_ops
= &bat_netdev_ops
;
108 dev
->open
= interface_open
;
109 dev
->stop
= interface_release
;
110 dev
->get_stats
= interface_stats
;
111 dev
->set_mac_address
= interface_set_mac_addr
;
112 dev
->change_mtu
= interface_change_mtu
;
113 dev
->hard_start_xmit
= interface_tx
;
115 dev
->destructor
= free_netdev
;
117 dev
->mtu
= hardif_min_mtu();
118 dev
->hard_header_len
= BAT_HEADER_LEN
; /* reserve more space in the
119 * skbuff for our header */
121 /* generate random address */
122 random_ether_addr(dev_addr
);
123 memcpy(dev
->dev_addr
, dev_addr
, ETH_ALEN
);
125 SET_ETHTOOL_OPS(dev
, &bat_ethtool_ops
);
127 memset(priv
, 0, sizeof(struct bat_priv
));
130 int interface_open(struct net_device
*dev
)
132 netif_start_queue(dev
);
136 int interface_release(struct net_device
*dev
)
138 netif_stop_queue(dev
);
142 struct net_device_stats
*interface_stats(struct net_device
*dev
)
144 struct bat_priv
*priv
= netdev_priv(dev
);
148 int interface_set_mac_addr(struct net_device
*dev
, void *p
)
150 struct sockaddr
*addr
= p
;
152 if (!is_valid_ether_addr(addr
->sa_data
))
153 return -EADDRNOTAVAIL
;
155 hna_local_remove(dev
->dev_addr
, "mac address changed");
156 memcpy(dev
->dev_addr
, addr
->sa_data
, ETH_ALEN
);
157 hna_local_add(dev
->dev_addr
);
162 int interface_change_mtu(struct net_device
*dev
, int new_mtu
)
165 if ((new_mtu
< 68) || (new_mtu
> hardif_min_mtu()))
173 int interface_tx(struct sk_buff
*skb
, struct net_device
*dev
)
175 struct unicast_packet
*unicast_packet
;
176 struct bcast_packet
*bcast_packet
;
177 struct orig_node
*orig_node
;
178 struct ethhdr
*ethhdr
= (struct ethhdr
*)skb
->data
;
179 struct bat_priv
*priv
= netdev_priv(dev
);
180 struct batman_if
*batman_if
;
182 int data_len
= skb
->len
;
185 if (atomic_read(&module_state
) != MODULE_ACTIVE
)
188 dev
->trans_start
= jiffies
;
189 /* TODO: check this for locks */
190 hna_local_add(ethhdr
->h_source
);
192 /* ethernet packet should be broadcasted */
193 if (is_bcast(ethhdr
->h_dest
) || is_mcast(ethhdr
->h_dest
)) {
195 if (my_skb_push(skb
, sizeof(struct bcast_packet
)) < 0)
198 bcast_packet
= (struct bcast_packet
*)skb
->data
;
199 bcast_packet
->version
= COMPAT_VERSION
;
201 /* batman packet type: broadcast */
202 bcast_packet
->packet_type
= BAT_BCAST
;
204 /* hw address of first interface is the orig mac because only
205 * this mac is known throughout the mesh */
206 memcpy(bcast_packet
->orig
, mainIfAddr
, ETH_ALEN
);
208 /* set broadcast sequence number */
209 bcast_packet
->seqno
= htons(bcast_seqno
);
213 /* broadcast packet */
214 add_bcast_packet_to_list(skb
);
215 /* a copy is stored in the bcast list, therefore removing
216 * the original skb. */
221 spin_lock_irqsave(&orig_hash_lock
, flags
);
222 /* get routing information */
223 orig_node
= ((struct orig_node
*)hash_find(orig_hash
,
226 /* check for hna host */
228 orig_node
= transtable_search(ethhdr
->h_dest
);
231 (orig_node
->batman_if
) &&
232 (orig_node
->router
)) {
233 if (my_skb_push(skb
, sizeof(struct unicast_packet
)) < 0)
236 unicast_packet
= (struct unicast_packet
*)skb
->data
;
238 unicast_packet
->version
= COMPAT_VERSION
;
239 /* batman packet type: unicast */
240 unicast_packet
->packet_type
= BAT_UNICAST
;
241 /* set unicast ttl */
242 unicast_packet
->ttl
= TTL
;
243 /* copy the destination for faster routing */
244 memcpy(unicast_packet
->dest
, orig_node
->orig
, ETH_ALEN
);
246 /* net_dev won't be available when not active */
247 if (orig_node
->batman_if
->if_active
!= IF_ACTIVE
)
250 /* don't lock while sending the packets ... we therefore
251 * copy the required data before sending */
253 batman_if
= orig_node
->batman_if
;
254 memcpy(dstaddr
, orig_node
->router
->addr
, ETH_ALEN
);
255 spin_unlock_irqrestore(&orig_hash_lock
, flags
);
257 send_skb_packet(skb
, batman_if
, dstaddr
);
263 priv
->stats
.tx_packets
++;
264 priv
->stats
.tx_bytes
+= data_len
;
268 spin_unlock_irqrestore(&orig_hash_lock
, flags
);
270 priv
->stats
.tx_dropped
++;
275 void interface_rx(struct sk_buff
*skb
, int hdr_size
)
277 struct net_device
*dev
= soft_device
;
278 struct bat_priv
*priv
= netdev_priv(dev
);
280 /* check if enough space is available for pulling, and pull */
281 if (!pskb_may_pull(skb
, hdr_size
)) {
285 skb_pull_rcsum(skb
, hdr_size
);
286 /* skb_set_mac_header(skb, -sizeof(struct ethhdr));*/
289 skb
->protocol
= eth_type_trans(skb
, dev
);
291 /* should not be neccesary anymore as we use skb_pull_rcsum()
292 * TODO: please verify this and remove this TODO
293 * -- Dec 21st 2009, Simon Wunderlich */
295 /* skb->ip_summed = CHECKSUM_UNNECESSARY;*/
297 /* TODO: set skb->pkt_type to PACKET_BROADCAST, PACKET_MULTICAST,
298 * PACKET_OTHERHOST or PACKET_HOST */
300 priv
->stats
.rx_packets
++;
301 priv
->stats
.rx_bytes
+= skb
->len
;
303 dev
->last_rx
= jiffies
;
309 static int bat_get_settings(struct net_device
*dev
, struct ethtool_cmd
*cmd
)
312 cmd
->advertising
= 0;
313 cmd
->speed
= SPEED_10
;
314 cmd
->duplex
= DUPLEX_FULL
;
316 cmd
->phy_address
= 0;
317 cmd
->transceiver
= XCVR_INTERNAL
;
318 cmd
->autoneg
= AUTONEG_DISABLE
;
325 static void bat_get_drvinfo(struct net_device
*dev
,
326 struct ethtool_drvinfo
*info
)
328 strcpy(info
->driver
, "B.A.T.M.A.N. advanced");
329 strcpy(info
->version
, SOURCE_VERSION
);
330 strcpy(info
->fw_version
, "N/A");
331 strcpy(info
->bus_info
, "batman");
334 static u32
bat_get_msglevel(struct net_device
*dev
)
339 static void bat_set_msglevel(struct net_device
*dev
, u32 value
)
343 static u32
bat_get_link(struct net_device
*dev
)
348 static u32
bat_get_rx_csum(struct net_device
*dev
)
353 static int bat_set_rx_csum(struct net_device
*dev
, u32 data
)