2 * Copyright (C) 2007-2012 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 "bat_debugfs.h"
28 #include "translation-table.h"
30 #include "gateway_common.h"
31 #include "gateway_client.h"
32 #include "bat_sysfs.h"
33 #include "originator.h"
34 #include <linux/slab.h>
35 #include <linux/ethtool.h>
36 #include <linux/etherdevice.h>
37 #include <linux/if_vlan.h>
39 #include "bridge_loop_avoidance.h"
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
);
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
,
57 int my_skb_head_push(struct sk_buff
*skb
, unsigned int len
)
62 * TODO: We must check if we can release all references to non-payload
63 * data using skb_header_release in our skbs to allow skb_cow_header to
64 * work optimally. This means that those skbs are not allowed to read
65 * or write any data which is before the current position of skb->data
66 * after that call and thus allow other skbs with the same data buffer
67 * to write freely in that area.
69 result
= skb_cow_head(skb
, len
);
77 static int interface_open(struct net_device
*dev
)
79 netif_start_queue(dev
);
83 static int interface_release(struct net_device
*dev
)
85 netif_stop_queue(dev
);
89 static struct net_device_stats
*interface_stats(struct net_device
*dev
)
91 struct bat_priv
*bat_priv
= netdev_priv(dev
);
92 return &bat_priv
->stats
;
95 static int interface_set_mac_addr(struct net_device
*dev
, void *p
)
97 struct bat_priv
*bat_priv
= netdev_priv(dev
);
98 struct sockaddr
*addr
= p
;
100 if (!is_valid_ether_addr(addr
->sa_data
))
101 return -EADDRNOTAVAIL
;
103 /* only modify transtable if it has been initialized before */
104 if (atomic_read(&bat_priv
->mesh_state
) == MESH_ACTIVE
) {
105 tt_local_remove(bat_priv
, dev
->dev_addr
,
106 "mac address changed", false);
107 tt_local_add(dev
, addr
->sa_data
, NULL_IFINDEX
);
110 memcpy(dev
->dev_addr
, addr
->sa_data
, ETH_ALEN
);
111 dev
->addr_assign_type
&= ~NET_ADDR_RANDOM
;
115 static int interface_change_mtu(struct net_device
*dev
, int new_mtu
)
118 if ((new_mtu
< 68) || (new_mtu
> hardif_min_mtu(dev
)))
126 static int interface_tx(struct sk_buff
*skb
, struct net_device
*soft_iface
)
128 struct ethhdr
*ethhdr
= (struct ethhdr
*)skb
->data
;
129 struct bat_priv
*bat_priv
= netdev_priv(soft_iface
);
130 struct hard_iface
*primary_if
= NULL
;
131 struct bcast_packet
*bcast_packet
;
132 struct vlan_ethhdr
*vhdr
;
133 static const uint8_t stp_addr
[ETH_ALEN
] = {0x01, 0x80, 0xC2, 0x00, 0x00,
135 unsigned int header_len
= 0;
136 int data_len
= skb
->len
, ret
;
137 short vid __maybe_unused
= -1;
138 bool do_bcast
= false;
140 if (atomic_read(&bat_priv
->mesh_state
) != MESH_ACTIVE
)
143 soft_iface
->trans_start
= jiffies
;
145 switch (ntohs(ethhdr
->h_proto
)) {
147 vhdr
= (struct vlan_ethhdr
*)skb
->data
;
148 vid
= ntohs(vhdr
->h_vlan_TCI
) & VLAN_VID_MASK
;
150 if (ntohs(vhdr
->h_vlan_encapsulated_proto
) != ETH_P_BATMAN
)
158 if (bla_tx(bat_priv
, skb
, vid
))
161 /* Register the client MAC in the transtable */
162 tt_local_add(soft_iface
, ethhdr
->h_source
, skb
->skb_iif
);
164 /* don't accept stp packets. STP does not help in meshes.
165 * better use the bridge loop avoidance ...
167 if (compare_eth(ethhdr
->h_dest
, stp_addr
))
170 if (is_multicast_ether_addr(ethhdr
->h_dest
)) {
173 switch (atomic_read(&bat_priv
->gw_mode
)) {
175 /* gateway servers should not send dhcp
176 * requests into the mesh */
177 ret
= gw_is_dhcp_target(skb
, &header_len
);
182 /* gateway clients should send dhcp requests
183 * via unicast to their gateway */
184 ret
= gw_is_dhcp_target(skb
, &header_len
);
194 /* ethernet packet should be broadcasted */
196 primary_if
= primary_if_get_selected(bat_priv
);
200 if (my_skb_head_push(skb
, sizeof(*bcast_packet
)) < 0)
203 bcast_packet
= (struct bcast_packet
*)skb
->data
;
204 bcast_packet
->header
.version
= COMPAT_VERSION
;
205 bcast_packet
->header
.ttl
= TTL
;
207 /* batman packet type: broadcast */
208 bcast_packet
->header
.packet_type
= BAT_BCAST
;
210 /* hw address of first interface is the orig mac because only
211 * this mac is known throughout the mesh */
212 memcpy(bcast_packet
->orig
,
213 primary_if
->net_dev
->dev_addr
, ETH_ALEN
);
215 /* set broadcast sequence number */
216 bcast_packet
->seqno
=
217 htonl(atomic_inc_return(&bat_priv
->bcast_seqno
));
219 add_bcast_packet_to_list(bat_priv
, skb
, 1);
221 /* a copy is stored in the bcast list, therefore removing
222 * the original skb. */
227 if (atomic_read(&bat_priv
->gw_mode
) != GW_MODE_OFF
) {
228 ret
= gw_out_of_range(bat_priv
, skb
, ethhdr
);
233 ret
= unicast_send_skb(skb
, bat_priv
);
238 bat_priv
->stats
.tx_packets
++;
239 bat_priv
->stats
.tx_bytes
+= data_len
;
245 bat_priv
->stats
.tx_dropped
++;
248 hardif_free_ref(primary_if
);
252 void interface_rx(struct net_device
*soft_iface
,
253 struct sk_buff
*skb
, struct hard_iface
*recv_if
,
256 struct bat_priv
*bat_priv
= netdev_priv(soft_iface
);
257 struct ethhdr
*ethhdr
;
258 struct vlan_ethhdr
*vhdr
;
259 short vid __maybe_unused
= -1;
261 /* check if enough space is available for pulling, and pull */
262 if (!pskb_may_pull(skb
, hdr_size
))
265 skb_pull_rcsum(skb
, hdr_size
);
266 skb_reset_mac_header(skb
);
268 ethhdr
= (struct ethhdr
*)skb_mac_header(skb
);
270 switch (ntohs(ethhdr
->h_proto
)) {
272 vhdr
= (struct vlan_ethhdr
*)skb
->data
;
273 vid
= ntohs(vhdr
->h_vlan_TCI
) & VLAN_VID_MASK
;
275 if (ntohs(vhdr
->h_vlan_encapsulated_proto
) != ETH_P_BATMAN
)
283 /* skb->dev & skb->pkt_type are set here */
284 if (unlikely(!pskb_may_pull(skb
, ETH_HLEN
)))
286 skb
->protocol
= eth_type_trans(skb
, soft_iface
);
288 /* should not be necessary anymore as we use skb_pull_rcsum()
289 * TODO: please verify this and remove this TODO
290 * -- Dec 21st 2009, Simon Wunderlich */
292 /* skb->ip_summed = CHECKSUM_UNNECESSARY;*/
294 bat_priv
->stats
.rx_packets
++;
295 bat_priv
->stats
.rx_bytes
+= skb
->len
+ ETH_HLEN
;
297 soft_iface
->last_rx
= jiffies
;
299 if (is_ap_isolated(bat_priv
, ethhdr
->h_source
, ethhdr
->h_dest
))
302 /* Let the bridge loop avoidance check the packet. If will
303 * not handle it, we can safely push it up.
305 if (bla_rx(bat_priv
, skb
, vid
))
317 static const struct net_device_ops bat_netdev_ops
= {
318 .ndo_open
= interface_open
,
319 .ndo_stop
= interface_release
,
320 .ndo_get_stats
= interface_stats
,
321 .ndo_set_mac_address
= interface_set_mac_addr
,
322 .ndo_change_mtu
= interface_change_mtu
,
323 .ndo_start_xmit
= interface_tx
,
324 .ndo_validate_addr
= eth_validate_addr
327 static void interface_setup(struct net_device
*dev
)
329 struct bat_priv
*priv
= netdev_priv(dev
);
333 dev
->netdev_ops
= &bat_netdev_ops
;
334 dev
->destructor
= free_netdev
;
335 dev
->tx_queue_len
= 0;
338 * can't call min_mtu, because the needed variables
339 * have not been initialized yet
341 dev
->mtu
= ETH_DATA_LEN
;
342 /* reserve more space in the skbuff for our header */
343 dev
->hard_header_len
= BAT_HEADER_LEN
;
345 /* generate random address */
346 eth_hw_addr_random(dev
);
348 SET_ETHTOOL_OPS(dev
, &bat_ethtool_ops
);
350 memset(priv
, 0, sizeof(*priv
));
353 struct net_device
*softif_create(const char *name
)
355 struct net_device
*soft_iface
;
356 struct bat_priv
*bat_priv
;
359 soft_iface
= alloc_netdev(sizeof(*bat_priv
), name
, interface_setup
);
364 ret
= register_netdevice(soft_iface
);
366 pr_err("Unable to register the batman interface '%s': %i\n",
368 goto free_soft_iface
;
371 bat_priv
= netdev_priv(soft_iface
);
373 atomic_set(&bat_priv
->aggregated_ogms
, 1);
374 atomic_set(&bat_priv
->bonding
, 0);
375 atomic_set(&bat_priv
->bridge_loop_avoidance
, 0);
376 atomic_set(&bat_priv
->ap_isolation
, 0);
377 atomic_set(&bat_priv
->vis_mode
, VIS_TYPE_CLIENT_UPDATE
);
378 atomic_set(&bat_priv
->gw_mode
, GW_MODE_OFF
);
379 atomic_set(&bat_priv
->gw_sel_class
, 20);
380 atomic_set(&bat_priv
->gw_bandwidth
, 41);
381 atomic_set(&bat_priv
->orig_interval
, 1000);
382 atomic_set(&bat_priv
->hop_penalty
, 30);
383 atomic_set(&bat_priv
->log_level
, 0);
384 atomic_set(&bat_priv
->fragmentation
, 1);
385 atomic_set(&bat_priv
->bcast_queue_left
, BCAST_QUEUE_LEN
);
386 atomic_set(&bat_priv
->batman_queue_left
, BATMAN_QUEUE_LEN
);
388 atomic_set(&bat_priv
->mesh_state
, MESH_INACTIVE
);
389 atomic_set(&bat_priv
->bcast_seqno
, 1);
390 atomic_set(&bat_priv
->ttvn
, 0);
391 atomic_set(&bat_priv
->tt_local_changes
, 0);
392 atomic_set(&bat_priv
->tt_ogm_append_cnt
, 0);
393 atomic_set(&bat_priv
->bla_num_requests
, 0);
395 bat_priv
->tt_buff
= NULL
;
396 bat_priv
->tt_buff_len
= 0;
397 bat_priv
->tt_poss_change
= false;
399 bat_priv
->primary_if
= NULL
;
400 bat_priv
->num_ifaces
= 0;
402 ret
= bat_algo_select(bat_priv
, bat_routing_algo
);
404 goto unreg_soft_iface
;
406 ret
= sysfs_add_meshif(soft_iface
);
408 goto unreg_soft_iface
;
410 ret
= debugfs_add_meshif(soft_iface
);
414 ret
= mesh_init(soft_iface
);
421 debugfs_del_meshif(soft_iface
);
423 sysfs_del_meshif(soft_iface
);
425 unregister_netdevice(soft_iface
);
429 free_netdev(soft_iface
);
434 void softif_destroy(struct net_device
*soft_iface
)
436 debugfs_del_meshif(soft_iface
);
437 sysfs_del_meshif(soft_iface
);
438 mesh_free(soft_iface
);
439 unregister_netdevice(soft_iface
);
442 int softif_is_valid(const struct net_device
*net_dev
)
444 if (net_dev
->netdev_ops
->ndo_start_xmit
== interface_tx
)
451 static int bat_get_settings(struct net_device
*dev
, struct ethtool_cmd
*cmd
)
454 cmd
->advertising
= 0;
455 ethtool_cmd_speed_set(cmd
, SPEED_10
);
456 cmd
->duplex
= DUPLEX_FULL
;
458 cmd
->phy_address
= 0;
459 cmd
->transceiver
= XCVR_INTERNAL
;
460 cmd
->autoneg
= AUTONEG_DISABLE
;
467 static void bat_get_drvinfo(struct net_device
*dev
,
468 struct ethtool_drvinfo
*info
)
470 strcpy(info
->driver
, "B.A.T.M.A.N. advanced");
471 strcpy(info
->version
, SOURCE_VERSION
);
472 strcpy(info
->fw_version
, "N/A");
473 strcpy(info
->bus_info
, "batman");
476 static u32
bat_get_msglevel(struct net_device
*dev
)
481 static void bat_set_msglevel(struct net_device
*dev
, u32 value
)
485 static u32
bat_get_link(struct net_device
*dev
)