1 /* Copyright (C) 2007-2012 B.A.T.M.A.N. contributors:
3 * Marek Lindner, Simon Wunderlich
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of version 2 of the GNU General Public
7 * License as published by the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 #include "soft-interface.h"
22 #include "hard-interface.h"
26 #include "translation-table.h"
28 #include "gateway_common.h"
29 #include "gateway_client.h"
31 #include "originator.h"
32 #include <linux/slab.h>
33 #include <linux/ethtool.h>
34 #include <linux/etherdevice.h>
35 #include <linux/if_vlan.h>
37 #include "bridge_loop_avoidance.h"
40 static int batadv_get_settings(struct net_device
*dev
, struct ethtool_cmd
*cmd
);
41 static void batadv_get_drvinfo(struct net_device
*dev
,
42 struct ethtool_drvinfo
*info
);
43 static u32
batadv_get_msglevel(struct net_device
*dev
);
44 static void batadv_set_msglevel(struct net_device
*dev
, u32 value
);
45 static u32
batadv_get_link(struct net_device
*dev
);
46 static void batadv_get_strings(struct net_device
*dev
, u32 stringset
, u8
*data
);
47 static void batadv_get_ethtool_stats(struct net_device
*dev
,
48 struct ethtool_stats
*stats
, u64
*data
);
49 static int batadv_get_sset_count(struct net_device
*dev
, int stringset
);
51 static const struct ethtool_ops batadv_ethtool_ops
= {
52 .get_settings
= batadv_get_settings
,
53 .get_drvinfo
= batadv_get_drvinfo
,
54 .get_msglevel
= batadv_get_msglevel
,
55 .set_msglevel
= batadv_set_msglevel
,
56 .get_link
= batadv_get_link
,
57 .get_strings
= batadv_get_strings
,
58 .get_ethtool_stats
= batadv_get_ethtool_stats
,
59 .get_sset_count
= batadv_get_sset_count
,
62 int batadv_skb_head_push(struct sk_buff
*skb
, unsigned int len
)
66 /* TODO: We must check if we can release all references to non-payload
67 * data using skb_header_release in our skbs to allow skb_cow_header to
68 * work optimally. This means that those skbs are not allowed to read
69 * or write any data which is before the current position of skb->data
70 * after that call and thus allow other skbs with the same data buffer
71 * to write freely in that area.
73 result
= skb_cow_head(skb
, len
);
81 static int batadv_interface_open(struct net_device
*dev
)
83 netif_start_queue(dev
);
87 static int batadv_interface_release(struct net_device
*dev
)
89 netif_stop_queue(dev
);
93 static struct net_device_stats
*batadv_interface_stats(struct net_device
*dev
)
95 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
96 struct net_device_stats
*stats
= &bat_priv
->stats
;
98 stats
->tx_packets
= batadv_sum_counter(bat_priv
, BATADV_CNT_TX
);
99 stats
->tx_bytes
= batadv_sum_counter(bat_priv
, BATADV_CNT_TX_BYTES
);
100 stats
->tx_dropped
= batadv_sum_counter(bat_priv
, BATADV_CNT_TX_DROPPED
);
101 stats
->rx_packets
= batadv_sum_counter(bat_priv
, BATADV_CNT_RX
);
102 stats
->rx_bytes
= batadv_sum_counter(bat_priv
, BATADV_CNT_RX_BYTES
);
106 static int batadv_interface_set_mac_addr(struct net_device
*dev
, void *p
)
108 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
109 struct sockaddr
*addr
= p
;
111 if (!is_valid_ether_addr(addr
->sa_data
))
112 return -EADDRNOTAVAIL
;
114 /* only modify transtable if it has been initialized before */
115 if (atomic_read(&bat_priv
->mesh_state
) == BATADV_MESH_ACTIVE
) {
116 batadv_tt_local_remove(bat_priv
, dev
->dev_addr
,
117 "mac address changed", false);
118 batadv_tt_local_add(dev
, addr
->sa_data
, BATADV_NULL_IFINDEX
);
121 memcpy(dev
->dev_addr
, addr
->sa_data
, ETH_ALEN
);
122 dev
->addr_assign_type
&= ~NET_ADDR_RANDOM
;
126 static int batadv_interface_change_mtu(struct net_device
*dev
, int new_mtu
)
129 if ((new_mtu
< 68) || (new_mtu
> batadv_hardif_min_mtu(dev
)))
137 static int batadv_interface_tx(struct sk_buff
*skb
,
138 struct net_device
*soft_iface
)
140 struct ethhdr
*ethhdr
= (struct ethhdr
*)skb
->data
;
141 struct batadv_priv
*bat_priv
= netdev_priv(soft_iface
);
142 struct batadv_hard_iface
*primary_if
= NULL
;
143 struct batadv_bcast_packet
*bcast_packet
;
144 struct vlan_ethhdr
*vhdr
;
145 __be16 ethertype
= __constant_htons(BATADV_ETH_P_BATMAN
);
146 static const uint8_t stp_addr
[ETH_ALEN
] = {0x01, 0x80, 0xC2, 0x00, 0x00,
148 unsigned int header_len
= 0;
149 int data_len
= skb
->len
, ret
;
150 short vid __maybe_unused
= -1;
151 bool do_bcast
= false;
154 if (atomic_read(&bat_priv
->mesh_state
) != BATADV_MESH_ACTIVE
)
157 soft_iface
->trans_start
= jiffies
;
159 switch (ntohs(ethhdr
->h_proto
)) {
161 vhdr
= (struct vlan_ethhdr
*)skb
->data
;
162 vid
= ntohs(vhdr
->h_vlan_TCI
) & VLAN_VID_MASK
;
164 if (vhdr
->h_vlan_encapsulated_proto
!= ethertype
)
168 case BATADV_ETH_P_BATMAN
:
172 if (batadv_bla_tx(bat_priv
, skb
, vid
))
175 /* Register the client MAC in the transtable */
176 batadv_tt_local_add(soft_iface
, ethhdr
->h_source
, skb
->skb_iif
);
178 /* don't accept stp packets. STP does not help in meshes.
179 * better use the bridge loop avoidance ...
181 if (batadv_compare_eth(ethhdr
->h_dest
, stp_addr
))
184 if (is_multicast_ether_addr(ethhdr
->h_dest
)) {
187 switch (atomic_read(&bat_priv
->gw_mode
)) {
188 case BATADV_GW_MODE_SERVER
:
189 /* gateway servers should not send dhcp
190 * requests into the mesh
192 ret
= batadv_gw_is_dhcp_target(skb
, &header_len
);
196 case BATADV_GW_MODE_CLIENT
:
197 /* gateway clients should send dhcp requests
198 * via unicast to their gateway
200 ret
= batadv_gw_is_dhcp_target(skb
, &header_len
);
204 case BATADV_GW_MODE_OFF
:
210 /* ethernet packet should be broadcasted */
212 primary_if
= batadv_primary_if_get_selected(bat_priv
);
216 if (batadv_skb_head_push(skb
, sizeof(*bcast_packet
)) < 0)
219 bcast_packet
= (struct batadv_bcast_packet
*)skb
->data
;
220 bcast_packet
->header
.version
= BATADV_COMPAT_VERSION
;
221 bcast_packet
->header
.ttl
= BATADV_TTL
;
223 /* batman packet type: broadcast */
224 bcast_packet
->header
.packet_type
= BATADV_BCAST
;
225 bcast_packet
->reserved
= 0;
227 /* hw address of first interface is the orig mac because only
228 * this mac is known throughout the mesh
230 memcpy(bcast_packet
->orig
,
231 primary_if
->net_dev
->dev_addr
, ETH_ALEN
);
233 /* set broadcast sequence number */
234 seqno
= atomic_inc_return(&bat_priv
->bcast_seqno
);
235 bcast_packet
->seqno
= htonl(seqno
);
237 batadv_add_bcast_packet_to_list(bat_priv
, skb
, 1);
239 /* a copy is stored in the bcast list, therefore removing
246 if (atomic_read(&bat_priv
->gw_mode
) != BATADV_GW_MODE_OFF
) {
247 ret
= batadv_gw_out_of_range(bat_priv
, skb
, ethhdr
);
252 ret
= batadv_unicast_send_skb(skb
, bat_priv
);
257 batadv_inc_counter(bat_priv
, BATADV_CNT_TX
);
258 batadv_add_counter(bat_priv
, BATADV_CNT_TX_BYTES
, data_len
);
264 batadv_inc_counter(bat_priv
, BATADV_CNT_TX_DROPPED
);
267 batadv_hardif_free_ref(primary_if
);
271 void batadv_interface_rx(struct net_device
*soft_iface
,
272 struct sk_buff
*skb
, struct batadv_hard_iface
*recv_if
,
273 int hdr_size
, struct batadv_orig_node
*orig_node
)
275 struct batadv_priv
*bat_priv
= netdev_priv(soft_iface
);
276 struct ethhdr
*ethhdr
;
277 struct vlan_ethhdr
*vhdr
;
278 struct batadv_header
*batadv_header
= (struct batadv_header
*)skb
->data
;
279 short vid __maybe_unused
= -1;
280 __be16 ethertype
= __constant_htons(BATADV_ETH_P_BATMAN
);
283 is_bcast
= (batadv_header
->packet_type
== BATADV_BCAST
);
285 /* check if enough space is available for pulling, and pull */
286 if (!pskb_may_pull(skb
, hdr_size
))
289 skb_pull_rcsum(skb
, hdr_size
);
290 skb_reset_mac_header(skb
);
292 ethhdr
= (struct ethhdr
*)skb_mac_header(skb
);
294 switch (ntohs(ethhdr
->h_proto
)) {
296 vhdr
= (struct vlan_ethhdr
*)skb
->data
;
297 vid
= ntohs(vhdr
->h_vlan_TCI
) & VLAN_VID_MASK
;
299 if (vhdr
->h_vlan_encapsulated_proto
!= ethertype
)
303 case BATADV_ETH_P_BATMAN
:
307 /* skb->dev & skb->pkt_type are set here */
308 if (unlikely(!pskb_may_pull(skb
, ETH_HLEN
)))
310 skb
->protocol
= eth_type_trans(skb
, soft_iface
);
312 /* should not be necessary anymore as we use skb_pull_rcsum()
313 * TODO: please verify this and remove this TODO
314 * -- Dec 21st 2009, Simon Wunderlich
317 /* skb->ip_summed = CHECKSUM_UNNECESSARY; */
319 batadv_inc_counter(bat_priv
, BATADV_CNT_RX
);
320 batadv_add_counter(bat_priv
, BATADV_CNT_RX_BYTES
,
321 skb
->len
+ ETH_HLEN
);
323 soft_iface
->last_rx
= jiffies
;
326 batadv_tt_add_temporary_global_entry(bat_priv
, orig_node
,
329 if (batadv_is_ap_isolated(bat_priv
, ethhdr
->h_source
, ethhdr
->h_dest
))
332 /* Let the bridge loop avoidance check the packet. If will
333 * not handle it, we can safely push it up.
335 if (batadv_bla_rx(bat_priv
, skb
, vid
, is_bcast
))
347 static const struct net_device_ops batadv_netdev_ops
= {
348 .ndo_open
= batadv_interface_open
,
349 .ndo_stop
= batadv_interface_release
,
350 .ndo_get_stats
= batadv_interface_stats
,
351 .ndo_set_mac_address
= batadv_interface_set_mac_addr
,
352 .ndo_change_mtu
= batadv_interface_change_mtu
,
353 .ndo_start_xmit
= batadv_interface_tx
,
354 .ndo_validate_addr
= eth_validate_addr
357 static void batadv_interface_setup(struct net_device
*dev
)
359 struct batadv_priv
*priv
= netdev_priv(dev
);
363 dev
->netdev_ops
= &batadv_netdev_ops
;
364 dev
->destructor
= free_netdev
;
365 dev
->tx_queue_len
= 0;
367 /* can't call min_mtu, because the needed variables
368 * have not been initialized yet
370 dev
->mtu
= ETH_DATA_LEN
;
371 /* reserve more space in the skbuff for our header */
372 dev
->hard_header_len
= BATADV_HEADER_LEN
;
374 /* generate random address */
375 eth_hw_addr_random(dev
);
377 SET_ETHTOOL_OPS(dev
, &batadv_ethtool_ops
);
379 memset(priv
, 0, sizeof(*priv
));
382 struct net_device
*batadv_softif_create(const char *name
)
384 struct net_device
*soft_iface
;
385 struct batadv_priv
*bat_priv
;
387 size_t cnt_len
= sizeof(uint64_t) * BATADV_CNT_NUM
;
389 soft_iface
= alloc_netdev(sizeof(*bat_priv
), name
,
390 batadv_interface_setup
);
395 bat_priv
= netdev_priv(soft_iface
);
397 /* batadv_interface_stats() needs to be available as soon as
398 * register_netdevice() has been called
400 bat_priv
->bat_counters
= __alloc_percpu(cnt_len
, __alignof__(uint64_t));
401 if (!bat_priv
->bat_counters
)
402 goto free_soft_iface
;
404 ret
= register_netdevice(soft_iface
);
406 pr_err("Unable to register the batman interface '%s': %i\n",
408 goto free_bat_counters
;
411 atomic_set(&bat_priv
->aggregated_ogms
, 1);
412 atomic_set(&bat_priv
->bonding
, 0);
413 atomic_set(&bat_priv
->bridge_loop_avoidance
, 0);
414 atomic_set(&bat_priv
->ap_isolation
, 0);
415 atomic_set(&bat_priv
->vis_mode
, BATADV_VIS_TYPE_CLIENT_UPDATE
);
416 atomic_set(&bat_priv
->gw_mode
, BATADV_GW_MODE_OFF
);
417 atomic_set(&bat_priv
->gw_sel_class
, 20);
418 atomic_set(&bat_priv
->gw_bandwidth
, 41);
419 atomic_set(&bat_priv
->orig_interval
, 1000);
420 atomic_set(&bat_priv
->hop_penalty
, 30);
421 atomic_set(&bat_priv
->log_level
, 0);
422 atomic_set(&bat_priv
->fragmentation
, 1);
423 atomic_set(&bat_priv
->bcast_queue_left
, BATADV_BCAST_QUEUE_LEN
);
424 atomic_set(&bat_priv
->batman_queue_left
, BATADV_BATMAN_QUEUE_LEN
);
426 atomic_set(&bat_priv
->mesh_state
, BATADV_MESH_INACTIVE
);
427 atomic_set(&bat_priv
->bcast_seqno
, 1);
428 atomic_set(&bat_priv
->tt
.vn
, 0);
429 atomic_set(&bat_priv
->tt
.local_changes
, 0);
430 atomic_set(&bat_priv
->tt
.ogm_append_cnt
, 0);
431 #ifdef CONFIG_BATMAN_ADV_BLA
432 atomic_set(&bat_priv
->bla
.num_requests
, 0);
434 bat_priv
->tt
.last_changeset
= NULL
;
435 bat_priv
->tt
.last_changeset_len
= 0;
436 bat_priv
->tt
.poss_change
= false;
438 bat_priv
->primary_if
= NULL
;
439 bat_priv
->num_ifaces
= 0;
441 ret
= batadv_algo_select(bat_priv
, batadv_routing_algo
);
443 goto unreg_soft_iface
;
445 ret
= batadv_sysfs_add_meshif(soft_iface
);
447 goto unreg_soft_iface
;
449 ret
= batadv_debugfs_add_meshif(soft_iface
);
453 ret
= batadv_mesh_init(soft_iface
);
460 batadv_debugfs_del_meshif(soft_iface
);
462 batadv_sysfs_del_meshif(soft_iface
);
464 free_percpu(bat_priv
->bat_counters
);
465 unregister_netdevice(soft_iface
);
469 free_percpu(bat_priv
->bat_counters
);
471 free_netdev(soft_iface
);
476 void batadv_softif_destroy(struct net_device
*soft_iface
)
478 batadv_debugfs_del_meshif(soft_iface
);
479 batadv_sysfs_del_meshif(soft_iface
);
480 batadv_mesh_free(soft_iface
);
481 unregister_netdevice(soft_iface
);
484 int batadv_softif_is_valid(const struct net_device
*net_dev
)
486 if (net_dev
->netdev_ops
->ndo_start_xmit
== batadv_interface_tx
)
493 static int batadv_get_settings(struct net_device
*dev
, struct ethtool_cmd
*cmd
)
496 cmd
->advertising
= 0;
497 ethtool_cmd_speed_set(cmd
, SPEED_10
);
498 cmd
->duplex
= DUPLEX_FULL
;
500 cmd
->phy_address
= 0;
501 cmd
->transceiver
= XCVR_INTERNAL
;
502 cmd
->autoneg
= AUTONEG_DISABLE
;
509 static void batadv_get_drvinfo(struct net_device
*dev
,
510 struct ethtool_drvinfo
*info
)
512 strcpy(info
->driver
, "B.A.T.M.A.N. advanced");
513 strcpy(info
->version
, BATADV_SOURCE_VERSION
);
514 strcpy(info
->fw_version
, "N/A");
515 strcpy(info
->bus_info
, "batman");
518 static u32
batadv_get_msglevel(struct net_device
*dev
)
523 static void batadv_set_msglevel(struct net_device
*dev
, u32 value
)
527 static u32
batadv_get_link(struct net_device
*dev
)
532 /* Inspired by drivers/net/ethernet/dlink/sundance.c:1702
533 * Declare each description string in struct.name[] to get fixed sized buffer
534 * and compile time checking for strings longer than ETH_GSTRING_LEN.
536 static const struct {
537 const char name
[ETH_GSTRING_LEN
];
538 } batadv_counters_strings
[] = {
552 { "tt_response_tx" },
553 { "tt_response_rx" },
554 { "tt_roam_adv_tx" },
555 { "tt_roam_adv_rx" },
558 static void batadv_get_strings(struct net_device
*dev
, uint32_t stringset
,
561 if (stringset
== ETH_SS_STATS
)
562 memcpy(data
, batadv_counters_strings
,
563 sizeof(batadv_counters_strings
));
566 static void batadv_get_ethtool_stats(struct net_device
*dev
,
567 struct ethtool_stats
*stats
,
570 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
573 for (i
= 0; i
< BATADV_CNT_NUM
; i
++)
574 data
[i
] = batadv_sum_counter(bat_priv
, i
);
577 static int batadv_get_sset_count(struct net_device
*dev
, int stringset
)
579 if (stringset
== ETH_SS_STATS
)
580 return BATADV_CNT_NUM
;