The handling for the header_ops create callback should be on all 6LoWPAN
implementation the same. We move that now to generic 6LoWPAN.
Signed-off-by: Alexander Aring <aar@xxxxxxxxxxxxxx>
---
include/net/6lowpan.h | 12 +++++
net/6lowpan/core.c | 35 ++++++++++++++
net/ieee802154/6lowpan/6lowpan_i.h | 3 --
net/ieee802154/6lowpan/core.c | 5 --
net/ieee802154/6lowpan/tx.c | 93 +++++++++++++-------------------------
5 files changed, 79 insertions(+), 69 deletions(-)
diff --git a/include/net/6lowpan.h b/include/net/6lowpan.h
index 90d9d08..9a6282b 100644
--- a/include/net/6lowpan.h
+++ b/include/net/6lowpan.h
@@ -133,6 +133,18 @@ lowpan_iphc_ctx_is_compression(const struct lowpan_iphc_ctx *ctx)
return test_bit(LOWPAN_IPHC_CTX_FLAG_COMPRESSION, &ctx->flags);
}
+struct lowpan_addr_info {
+ unsigned char daddr[EUI64_ADDR_LEN];
+ unsigned char saddr[EUI64_ADDR_LEN];
+};
+
+static inline struct
+lowpan_addr_info *lowpan_addr_info(const struct sk_buff *skb)
+{
+ return (struct lowpan_addr_info *)(skb->data -
+ sizeof(struct lowpan_addr_info));
+}
+
struct lowpan_dev {
enum lowpan_lltypes lltype;
struct dentry *iface_debugfs;
diff --git a/net/6lowpan/core.c b/net/6lowpan/core.c
index 00ffab3..b01effd 100644
--- a/net/6lowpan/core.c
+++ b/net/6lowpan/core.c
@@ -18,6 +18,33 @@
#include "6lowpan_i.h"
+/* TODO I think AF_PACKET DGRAM (sending/receiving) RAW (sending) makes no
+ * sense here. We should disable it, the right use-case would be AF_INET6
+ * RAW/DGRAM sockets.
+ */
+static int lowpan_header_create(struct sk_buff *skb, struct net_device *dev,
+ unsigned short type, const void *daddr,
+ const void *saddr, unsigned int len)
+{
+ struct lowpan_addr_info *info = lowpan_addr_info(skb);
+
+ if (WARN_ON_ONCE(type != ETH_P_IPV6))
+ return -EINVAL;
+
+ memcpy(info->daddr, daddr, dev->addr_len);
+
+ if (saddr)
+ memcpy(info->saddr, saddr, dev->addr_len);
+ else
+ memcpy(info->saddr, dev->dev_addr, dev->addr_len);
+
+ return 0;
+}
+
+static struct header_ops header_ops = {
+ .create = lowpan_header_create,
+};
+
int lowpan_register_netdevice(struct net_device *dev,
enum lowpan_lltypes lltype)
{
@@ -28,6 +55,14 @@ int lowpan_register_netdevice(struct net_device *dev,
dev->mtu = IPV6_MIN_MTU;
dev->priv_flags |= IFF_NO_QUEUE;
+ dev->header_ops = &header_ops;
+
+ /* We need at least headroom for lowpan_addr_info to get necessary
+ * address information from header create to xmit callback.
+ */
+ if (dev->needed_headroom < sizeof(struct lowpan_addr_info))
+ dev->needed_headroom += sizeof(struct lowpan_addr_info);
+
lowpan_dev(dev)->lltype = lltype;
spin_lock_init(&lowpan_dev(dev)->ctx.lock);
diff --git a/net/ieee802154/6lowpan/6lowpan_i.h b/net/ieee802154/6lowpan/6lowpan_i.h
index 39b739f..709c22c 100644
--- a/net/ieee802154/6lowpan/6lowpan_i.h
+++ b/net/ieee802154/6lowpan/6lowpan_i.h
@@ -48,9 +48,6 @@ int lowpan_net_frag_init(void);
void lowpan_rx_init(void);
void lowpan_rx_exit(void);
-int lowpan_header_create(struct sk_buff *skb, struct net_device *dev,
- unsigned short type, const void *_daddr,
- const void *_saddr, unsigned int len);
netdev_tx_t lowpan_xmit(struct sk_buff *skb, struct net_device *dev);
int lowpan_iphc_decompress(struct sk_buff *skb);
diff --git a/net/ieee802154/6lowpan/core.c b/net/ieee802154/6lowpan/core.c
index f70edcc..096a194 100644
--- a/net/ieee802154/6lowpan/core.c
+++ b/net/ieee802154/6lowpan/core.c
@@ -54,10 +54,6 @@
static int open_count;
-static struct header_ops lowpan_header_ops = {
- .create = lowpan_header_create,
-};
-
static int lowpan_dev_init(struct net_device *ldev)
{
netdev_lockdep_set_classes(ldev);
@@ -106,7 +102,6 @@ static void lowpan_setup(struct net_device *ldev)
ldev->flags = IFF_BROADCAST | IFF_MULTICAST;
ldev->netdev_ops = &lowpan_netdev_ops;
- ldev->header_ops = &lowpan_header_ops;
ldev->destructor = free_netdev;
ldev->features |= NETIF_F_NETNS_LOCAL;
}
diff --git a/net/ieee802154/6lowpan/tx.c b/net/ieee802154/6lowpan/tx.c
index a7a1b12..f56b9cd 100644
--- a/net/ieee802154/6lowpan/tx.c
+++ b/net/ieee802154/6lowpan/tx.c
@@ -18,48 +18,23 @@
#define LOWPAN_FRAG1_HEAD_SIZE 0x4
#define LOWPAN_FRAGN_HEAD_SIZE 0x5
-struct lowpan_addr_info {
- struct ieee802154_addr daddr;
- struct ieee802154_addr saddr;
-};
-
-static inline struct
-lowpan_addr_info *lowpan_skb_priv(const struct sk_buff *skb)
-{
- return (struct lowpan_addr_info *)(skb->data -
- sizeof(struct lowpan_addr_info));
-}
-
-/* This callback will be called from AF_PACKET and IPv6 stack, the AF_PACKET
- * sockets gives an 8 byte array for addresses only!
- *
- * TODO I think AF_PACKET DGRAM (sending/receiving) RAW (sending) makes no
- * sense here. We should disable it, the right use-case would be AF_INET6
- * RAW/DGRAM sockets.
- */
-int lowpan_header_create(struct sk_buff *skb, struct net_device *ldev,
- unsigned short type, const void *daddr,
- const void *saddr, unsigned int len)
+static void lowpan_addr_lookup(struct net_device *ldev, struct sk_buff *skb,
+ struct ieee802154_addr *daddr,
+ struct ieee802154_addr *saddr)
{
struct wpan_dev *wpan_dev = lowpan_802154_dev(ldev)->wdev->ieee802154_ptr;
- struct lowpan_addr_info *info = lowpan_skb_priv(skb);
+ struct lowpan_addr_info *info = lowpan_addr_info(skb);
struct lowpan_802154_neigh *llneigh = NULL;
const struct ipv6hdr *hdr = ipv6_hdr(skb);
struct neighbour *n;
- /* TODO:
- * if this package isn't ipv6 one, where should it be routed?
- */
- if (type != ETH_P_IPV6)
- return 0;
-
/* intra-pan communication */
- info->saddr.pan_id = wpan_dev->pan_id;
- info->daddr.pan_id = info->saddr.pan_id;
+ saddr->pan_id = wpan_dev->pan_id;
+ daddr->pan_id = saddr->pan_id;
- if (!memcmp(daddr, ldev->broadcast, EUI64_ADDR_LEN)) {
- info->daddr.short_addr = cpu_to_le16(IEEE802154_ADDR_BROADCAST);
- info->daddr.mode = IEEE802154_ADDR_SHORT;
+ if (!memcmp(info->daddr, ldev->broadcast, EUI64_ADDR_LEN)) {
+ daddr->short_addr = cpu_to_le16(IEEE802154_ADDR_BROADCAST);
+ daddr->mode = IEEE802154_ADDR_SHORT;
} else {
__le16 short_addr = cpu_to_le16(IEEE802154_ADDR_SHORT_UNSPEC);
@@ -73,32 +48,25 @@ int lowpan_header_create(struct sk_buff *skb, struct net_device *ldev,
if (llneigh &&
lowpan_802154_is_valid_src_short_addr(short_addr)) {
- info->daddr.short_addr = short_addr;
- info->daddr.mode = IEEE802154_ADDR_SHORT;
+ daddr->short_addr = short_addr;
+ daddr->mode = IEEE802154_ADDR_SHORT;
} else {
- info->daddr.mode = IEEE802154_ADDR_LONG;
- ieee802154_be64_to_le64(&info->daddr.extended_addr,
- daddr);
+ daddr->mode = IEEE802154_ADDR_LONG;
+ ieee802154_be64_to_le64(&daddr->extended_addr,
+ info->daddr);
}
if (n)
neigh_release(n);
}
- if (!saddr) {
- if (lowpan_802154_is_valid_src_short_addr(wpan_dev->short_addr)) {
- info->saddr.mode = IEEE802154_ADDR_SHORT;
- info->saddr.short_addr = wpan_dev->short_addr;
- } else {
- info->saddr.mode = IEEE802154_ADDR_LONG;
- info->saddr.extended_addr = wpan_dev->extended_addr;
- }
+ if (lowpan_802154_is_valid_src_short_addr(wpan_dev->short_addr)) {
+ saddr->mode = IEEE802154_ADDR_SHORT;
+ saddr->short_addr = wpan_dev->short_addr;
} else {
- info->saddr.mode = IEEE802154_ADDR_LONG;
- ieee802154_be64_to_le64(&info->saddr.extended_addr, saddr);
+ saddr->mode = IEEE802154_ADDR_LONG;
+ ieee802154_be64_to_le64(&saddr->extended_addr, info->saddr);
}
-
- return 0;
}
static struct sk_buff*
@@ -227,33 +195,33 @@ err:
}
static int lowpan_header(struct sk_buff *skb, struct net_device *ldev,
- u16 *dgram_size, u16 *dgram_offset)
+ u16 *dgram_size, u16 *dgram_offset,
+ const struct ieee802154_addr *daddr,
+ const struct ieee802154_addr *saddr)
{
struct wpan_dev *wpan_dev = lowpan_802154_dev(ldev)->wdev->ieee802154_ptr;
struct ieee802154_mac_cb *cb = mac_cb_init(skb);
- struct lowpan_addr_info info;
-
- memcpy(&info, lowpan_skb_priv(skb), sizeof(info));
*dgram_size = skb->len;
- lowpan_header_compress(skb, ldev, &info.daddr, &info.saddr);
+ lowpan_header_compress(skb, ldev, daddr, saddr);
/* dgram_offset = (saved bytes after compression) + lowpan header len */
*dgram_offset = (*dgram_size - skb->len) + skb_network_header_len(skb);
cb->type = IEEE802154_FC_TYPE_DATA;
- if (info.daddr.mode == IEEE802154_ADDR_SHORT &&
- ieee802154_is_broadcast_short_addr(info.daddr.short_addr))
+ if (daddr->mode == IEEE802154_ADDR_SHORT &&
+ ieee802154_is_broadcast_short_addr(daddr->short_addr))
cb->ackreq = false;
else
cb->ackreq = wpan_dev->ackreq;
- return wpan_dev_hard_header(skb, lowpan_802154_dev(ldev)->wdev,
- &info.daddr, &info.saddr, 0);
+ return wpan_dev_hard_header(skb, lowpan_802154_dev(ldev)->wdev, daddr,
+ saddr, 0);
}
netdev_tx_t lowpan_xmit(struct sk_buff *skb, struct net_device *ldev)
{
+ struct ieee802154_addr daddr, saddr;
struct ieee802154_hdr wpan_hdr;
int max_single, ret;
u16 dgram_size, dgram_offset;
@@ -262,6 +230,8 @@ netdev_tx_t lowpan_xmit(struct sk_buff *skb, struct net_device *ldev)
WARN_ON_ONCE(skb->len > IPV6_MIN_MTU);
+ lowpan_addr_lookup(ldev, skb, &daddr, &saddr);
+
/* We must take a copy of the skb before we modify/replace the ipv6
* header as the header could be used elsewhere
*/
@@ -269,7 +239,8 @@ netdev_tx_t lowpan_xmit(struct sk_buff *skb, struct net_device *ldev)
if (!skb)
return NET_XMIT_DROP;
- ret = lowpan_header(skb, ldev, &dgram_size, &dgram_offset);
+ ret = lowpan_header(skb, ldev, &dgram_size, &dgram_offset, &daddr,
+ &saddr);
if (ret < 0) {
kfree_skb(skb);
return NET_XMIT_DROP;
--
2.9.2
--
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