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/ethtool.h>
30 #include <linux/etherdevice.h>
32 static uint16_t bcast_seqno = 1; /* give own bcast messages seq numbers to avoid
34 static int32_t skb_packets;
35 static int32_t skb_bad_packets;
37 unsigned char mainIfAddr[ETH_ALEN];
38 static unsigned char mainIfAddr_default[ETH_ALEN];
39 static int bat_get_settings(struct net_device *dev, struct ethtool_cmd *cmd);
40 static void bat_get_drvinfo(struct net_device *dev,
41 struct ethtool_drvinfo *info);
42 static u32 bat_get_msglevel(struct net_device *dev);
43 static void bat_set_msglevel(struct net_device *dev, u32 value);
44 static u32 bat_get_link(struct net_device *dev);
45 static u32 bat_get_rx_csum(struct net_device *dev);
46 static int bat_set_rx_csum(struct net_device *dev, u32 data);
48 static const struct ethtool_ops bat_ethtool_ops = {
49 .get_settings = bat_get_settings,
50 .get_drvinfo = bat_get_drvinfo,
51 .get_msglevel = bat_get_msglevel,
52 .set_msglevel = bat_set_msglevel,
53 .get_link = bat_get_link,
54 .get_rx_csum = bat_get_rx_csum,
55 .set_rx_csum = bat_set_rx_csum
58 void set_main_if_addr(uint8_t *addr)
60 memcpy(mainIfAddr, addr, ETH_ALEN);
63 int main_if_was_up(void)
65 return (memcmp(mainIfAddr, mainIfAddr_default, ETH_ALEN) != 0 ? 1 : 0);
68 int my_skb_push(struct sk_buff *skb, unsigned int len)
73 if (skb_headroom(skb) < len) {
75 result = pskb_expand_head(skb, len, 0, GFP_ATOMIC);
85 #ifdef HAVE_NET_DEVICE_OPS
86 static const struct net_device_ops bat_netdev_ops = {
87 .ndo_open = interface_open,
88 .ndo_stop = interface_release,
89 .ndo_get_stats = interface_stats,
90 .ndo_set_mac_address = interface_set_mac_addr,
91 .ndo_change_mtu = interface_change_mtu,
92 .ndo_start_xmit = interface_tx,
93 .ndo_validate_addr = eth_validate_addr
97 void interface_setup(struct net_device *dev)
99 struct bat_priv *priv = netdev_priv(dev);
100 char dev_addr[ETH_ALEN];
104 #ifdef HAVE_NET_DEVICE_OPS
105 dev->netdev_ops = &bat_netdev_ops;
107 dev->open = interface_open;
108 dev->stop = interface_release;
109 dev->get_stats = interface_stats;
110 dev->set_mac_address = interface_set_mac_addr;
111 dev->change_mtu = interface_change_mtu;
112 dev->hard_start_xmit = interface_tx;
114 dev->destructor = free_netdev;
116 dev->mtu = hardif_min_mtu();
117 dev->hard_header_len = BAT_HEADER_LEN; /* reserve more space in the
118 * skbuff for our header */
120 /* generate random address */
121 random_ether_addr(dev_addr);
122 memcpy(dev->dev_addr, dev_addr, ETH_ALEN);
124 SET_ETHTOOL_OPS(dev, &bat_ethtool_ops);
126 memset(priv, 0, sizeof(struct bat_priv));
129 int interface_open(struct net_device *dev)
131 netif_start_queue(dev);
135 int interface_release(struct net_device *dev)
137 netif_stop_queue(dev);
141 struct net_device_stats *interface_stats(struct net_device *dev)
143 struct bat_priv *priv = netdev_priv(dev);
147 int interface_set_mac_addr(struct net_device *dev, void *p)
149 struct sockaddr *addr = p;
151 if (!is_valid_ether_addr(addr->sa_data))
152 return -EADDRNOTAVAIL;
154 hna_local_remove(dev->dev_addr, "mac address changed");
155 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
156 hna_local_add(dev->dev_addr);
161 int interface_change_mtu(struct net_device *dev, int new_mtu)
164 if ((new_mtu < 68) || (new_mtu > hardif_min_mtu()))
172 int interface_tx(struct sk_buff *skb, struct net_device *dev)
174 struct unicast_packet *unicast_packet;
175 struct bcast_packet *bcast_packet;
176 struct orig_node *orig_node;
177 struct ethhdr *ethhdr = (struct ethhdr *)skb->data;
178 struct bat_priv *priv = netdev_priv(dev);
179 struct batman_if *batman_if;
181 int data_len = skb->len;
184 if (atomic_read(&module_state) != MODULE_ACTIVE)
187 dev->trans_start = jiffies;
188 /* TODO: check this for locks */
189 hna_local_add(ethhdr->h_source);
191 /* ethernet packet should be broadcasted */
192 if (is_bcast(ethhdr->h_dest) || is_mcast(ethhdr->h_dest)) {
194 if (my_skb_push(skb, sizeof(struct bcast_packet)) < 0)
197 bcast_packet = (struct bcast_packet *)skb->data;
198 bcast_packet->version = COMPAT_VERSION;
200 /* batman packet type: broadcast */
201 bcast_packet->packet_type = BAT_BCAST;
203 /* hw address of first interface is the orig mac because only
204 * this mac is known throughout the mesh */
205 memcpy(bcast_packet->orig, mainIfAddr, ETH_ALEN);
207 /* set broadcast sequence number */
208 bcast_packet->seqno = htons(bcast_seqno);
212 /* broadcast packet */
213 add_bcast_packet_to_list(skb);
214 /* a copy is stored in the bcast list, therefore removing
215 * the original skb. */
220 spin_lock_irqsave(&orig_hash_lock, flags);
221 /* get routing information */
222 orig_node = ((struct orig_node *)hash_find(orig_hash,
225 /* check for hna host */
227 orig_node = transtable_search(ethhdr->h_dest);
230 (orig_node->batman_if) &&
231 (orig_node->router)) {
232 if (my_skb_push(skb, sizeof(struct unicast_packet)) < 0)
235 unicast_packet = (struct unicast_packet *)skb->data;
237 unicast_packet->version = COMPAT_VERSION;
238 /* batman packet type: unicast */
239 unicast_packet->packet_type = BAT_UNICAST;
240 /* set unicast ttl */
241 unicast_packet->ttl = TTL;
242 /* copy the destination for faster routing */
243 memcpy(unicast_packet->dest, orig_node->orig, ETH_ALEN);
245 /* net_dev won't be available when not active */
246 if (orig_node->batman_if->if_active != IF_ACTIVE)
249 /* don't lock while sending the packets ... we therefore
250 * copy the required data before sending */
252 batman_if = orig_node->batman_if;
253 memcpy(dstaddr, orig_node->router->addr, ETH_ALEN);
254 spin_unlock_irqrestore(&orig_hash_lock, flags);
256 send_skb_packet(skb, batman_if, dstaddr);
262 priv->stats.tx_packets++;
263 priv->stats.tx_bytes += data_len;
267 spin_unlock_irqrestore(&orig_hash_lock, flags);
269 priv->stats.tx_dropped++;
274 void interface_rx(struct sk_buff *skb, int hdr_size)
276 struct net_device *dev = soft_device;
277 struct bat_priv *priv = netdev_priv(dev);
279 /* check if enough space is available for pulling, and pull */
280 if (!pskb_may_pull(skb, hdr_size)) {
284 skb_pull_rcsum(skb, hdr_size);
285 /* skb_set_mac_header(skb, -sizeof(struct ethhdr));*/
288 skb->protocol = eth_type_trans(skb, dev);
290 /* should not be neccesary anymore as we use skb_pull_rcsum()
291 * TODO: please verify this and remove this TODO
292 * -- Dec 21st 2009, Simon Wunderlich */
294 /* skb->ip_summed = CHECKSUM_UNNECESSARY;*/
296 /* TODO: set skb->pkt_type to PACKET_BROADCAST, PACKET_MULTICAST,
297 * PACKET_OTHERHOST or PACKET_HOST */
299 priv->stats.rx_packets++;
300 priv->stats.rx_bytes += skb->len;
302 dev->last_rx = jiffies;
308 static int bat_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
311 cmd->advertising = 0;
312 cmd->speed = SPEED_10;
313 cmd->duplex = DUPLEX_FULL;
315 cmd->phy_address = 0;
316 cmd->transceiver = XCVR_INTERNAL;
317 cmd->autoneg = AUTONEG_DISABLE;
324 static void bat_get_drvinfo(struct net_device *dev,
325 struct ethtool_drvinfo *info)
327 strcpy(info->driver, "B.A.T.M.A.N. advanced");
328 strcpy(info->version, SOURCE_VERSION);
329 strcpy(info->fw_version, "N/A");
330 strcpy(info->bus_info, "batman");
333 static u32 bat_get_msglevel(struct net_device *dev)
338 static void bat_set_msglevel(struct net_device *dev, u32 value)
342 static u32 bat_get_link(struct net_device *dev)
347 static u32 bat_get_rx_csum(struct net_device *dev)
352 static int bat_set_rx_csum(struct net_device *dev, u32 data)