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mac802154: rx: move receive handling into rx.c
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This patch removes all relevant receiving functions inclusive frame
parsing into rx file. Like mac80211 we should implement the complete
receive handling and parsing in this file.

Signed-off-by: Alexander Aring <[email protected]>
Signed-off-by: Marcel Holtmann <[email protected]>
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@alexaring @holtmann
alexaring authored and holtmann committed Oct 27, 2014
1 parent c730c90 commit 2a9820c
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Showing 4 changed files with 214 additions and 214 deletions.
1 change: 0 additions & 1 deletion net/mac802154/ieee802154_i.h
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Original file line number Diff line number Diff line change
Expand Up @@ -131,7 +131,6 @@ void mac802154_monitor_setup(struct net_device *dev);
netdev_tx_t
ieee802154_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev);

void mac802154_wpans_rx(struct ieee802154_local *local, struct sk_buff *skb);
void mac802154_wpan_setup(struct net_device *dev);
netdev_tx_t
ieee802154_subif_start_xmit(struct sk_buff *skb, struct net_device *dev);
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186 changes: 0 additions & 186 deletions net/mac802154/iface.c
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Original file line number Diff line number Diff line change
Expand Up @@ -373,189 +373,3 @@ void mac802154_wpan_setup(struct net_device *dev)

mac802154_llsec_init(&sdata->sec);
}

static int mac802154_process_data(struct net_device *dev, struct sk_buff *skb)
{
return netif_receive_skb(skb);
}

static int
mac802154_subif_frame(struct ieee802154_sub_if_data *sdata, struct sk_buff *skb,
const struct ieee802154_hdr *hdr)
{
__le16 span, sshort;
int rc;

pr_debug("getting packet via slave interface %s\n", sdata->dev->name);

spin_lock_bh(&sdata->mib_lock);

span = sdata->pan_id;
sshort = sdata->short_addr;

switch (mac_cb(skb)->dest.mode) {
case IEEE802154_ADDR_NONE:
if (mac_cb(skb)->dest.mode != IEEE802154_ADDR_NONE)
/* FIXME: check if we are PAN coordinator */
skb->pkt_type = PACKET_OTHERHOST;
else
/* ACK comes with both addresses empty */
skb->pkt_type = PACKET_HOST;
break;
case IEEE802154_ADDR_LONG:
if (mac_cb(skb)->dest.pan_id != span &&
mac_cb(skb)->dest.pan_id != cpu_to_le16(IEEE802154_PANID_BROADCAST))
skb->pkt_type = PACKET_OTHERHOST;
else if (mac_cb(skb)->dest.extended_addr == sdata->extended_addr)
skb->pkt_type = PACKET_HOST;
else
skb->pkt_type = PACKET_OTHERHOST;
break;
case IEEE802154_ADDR_SHORT:
if (mac_cb(skb)->dest.pan_id != span &&
mac_cb(skb)->dest.pan_id != cpu_to_le16(IEEE802154_PANID_BROADCAST))
skb->pkt_type = PACKET_OTHERHOST;
else if (mac_cb(skb)->dest.short_addr == sshort)
skb->pkt_type = PACKET_HOST;
else if (mac_cb(skb)->dest.short_addr ==
cpu_to_le16(IEEE802154_ADDR_BROADCAST))
skb->pkt_type = PACKET_BROADCAST;
else
skb->pkt_type = PACKET_OTHERHOST;
break;
default:
spin_unlock_bh(&sdata->mib_lock);
pr_debug("invalid dest mode\n");
kfree_skb(skb);
return NET_RX_DROP;
}

spin_unlock_bh(&sdata->mib_lock);

skb->dev = sdata->dev;

rc = mac802154_llsec_decrypt(&sdata->sec, skb);
if (rc) {
pr_debug("decryption failed: %i\n", rc);
goto fail;
}

sdata->dev->stats.rx_packets++;
sdata->dev->stats.rx_bytes += skb->len;

switch (mac_cb(skb)->type) {
case IEEE802154_FC_TYPE_DATA:
return mac802154_process_data(sdata->dev, skb);
default:
pr_warn("ieee802154: bad frame received (type = %d)\n",
mac_cb(skb)->type);
goto fail;
}

fail:
kfree_skb(skb);
return NET_RX_DROP;
}

static void mac802154_print_addr(const char *name,
const struct ieee802154_addr *addr)
{
if (addr->mode == IEEE802154_ADDR_NONE)
pr_debug("%s not present\n", name);

pr_debug("%s PAN ID: %04x\n", name, le16_to_cpu(addr->pan_id));
if (addr->mode == IEEE802154_ADDR_SHORT) {
pr_debug("%s is short: %04x\n", name,
le16_to_cpu(addr->short_addr));
} else {
u64 hw = swab64((__force u64) addr->extended_addr);

pr_debug("%s is hardware: %8phC\n", name, &hw);
}
}

static int mac802154_parse_frame_start(struct sk_buff *skb,
struct ieee802154_hdr *hdr)
{
int hlen;
struct ieee802154_mac_cb *cb = mac_cb_init(skb);

hlen = ieee802154_hdr_pull(skb, hdr);
if (hlen < 0)
return -EINVAL;

skb->mac_len = hlen;

pr_debug("fc: %04x dsn: %02x\n", le16_to_cpup((__le16 *)&hdr->fc),
hdr->seq);

cb->type = hdr->fc.type;
cb->ackreq = hdr->fc.ack_request;
cb->secen = hdr->fc.security_enabled;

mac802154_print_addr("destination", &hdr->dest);
mac802154_print_addr("source", &hdr->source);

cb->source = hdr->source;
cb->dest = hdr->dest;

if (hdr->fc.security_enabled) {
u64 key;

pr_debug("seclevel %i\n", hdr->sec.level);

switch (hdr->sec.key_id_mode) {
case IEEE802154_SCF_KEY_IMPLICIT:
pr_debug("implicit key\n");
break;

case IEEE802154_SCF_KEY_INDEX:
pr_debug("key %02x\n", hdr->sec.key_id);
break;

case IEEE802154_SCF_KEY_SHORT_INDEX:
pr_debug("key %04x:%04x %02x\n",
le32_to_cpu(hdr->sec.short_src) >> 16,
le32_to_cpu(hdr->sec.short_src) & 0xffff,
hdr->sec.key_id);
break;

case IEEE802154_SCF_KEY_HW_INDEX:
key = swab64((__force u64) hdr->sec.extended_src);
pr_debug("key source %8phC %02x\n", &key,
hdr->sec.key_id);
break;
}
}

return 0;
}

void mac802154_wpans_rx(struct ieee802154_local *local, struct sk_buff *skb)
{
int ret;
struct ieee802154_sub_if_data *sdata;
struct ieee802154_hdr hdr;

ret = mac802154_parse_frame_start(skb, &hdr);
if (ret) {
pr_debug("got invalid frame\n");
kfree_skb(skb);
return;
}

rcu_read_lock();
list_for_each_entry_rcu(sdata, &local->interfaces, list) {
if (sdata->type != IEEE802154_DEV_WPAN ||
!netif_running(sdata->dev))
continue;

mac802154_subif_frame(sdata, skb, &hdr);
skb = NULL;
break;
}
rcu_read_unlock();

if (skb)
kfree_skb(skb);
}
27 changes: 0 additions & 27 deletions net/mac802154/monitor.c
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Original file line number Diff line number Diff line change
Expand Up @@ -18,9 +18,7 @@
*/

#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <linux/if_arp.h>
#include <linux/crc-ccitt.h>
#include <linux/ieee802154.h>

#include <net/mac802154.h>
Expand All @@ -30,31 +28,6 @@

#include "ieee802154_i.h"

void mac802154_monitors_rx(struct ieee802154_local *local, struct sk_buff *skb)
{
struct sk_buff *skb2;
struct ieee802154_sub_if_data *sdata;
u16 crc = crc_ccitt(0, skb->data, skb->len);
u8 *data;

rcu_read_lock();
list_for_each_entry_rcu(sdata, &local->interfaces, list) {
if (sdata->type != IEEE802154_DEV_MONITOR ||
!netif_running(sdata->dev))
continue;

skb2 = skb_clone(skb, GFP_ATOMIC);
skb2->dev = sdata->dev;
skb2->pkt_type = PACKET_HOST;
data = skb_put(skb2, 2);
data[0] = crc & 0xff;
data[1] = crc >> 8;

netif_rx_ni(skb2);
}
rcu_read_unlock();
}

static const struct net_device_ops mac802154_monitor_ops = {
.ndo_open = mac802154_slave_open,
.ndo_stop = mac802154_slave_close,
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