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-rw-r--r--net/ieee802154/6lowpan/core.c18
-rw-r--r--net/ieee802154/6lowpan/rx.c2
-rw-r--r--net/ieee802154/6lowpan/tx.c49
3 files changed, 48 insertions, 21 deletions
diff --git a/net/ieee802154/6lowpan/core.c b/net/ieee802154/6lowpan/core.c
index 9f0cfa598e3a..20c49c724ba0 100644
--- a/net/ieee802154/6lowpan/core.c
+++ b/net/ieee802154/6lowpan/core.c
@@ -101,14 +101,9 @@ static const struct net_device_ops lowpan_netdev_ops = {
static void lowpan_setup(struct net_device *ldev)
{
- ldev->addr_len = IEEE802154_ADDR_LEN;
memset(ldev->broadcast, 0xff, IEEE802154_ADDR_LEN);
- ldev->type = ARPHRD_6LOWPAN;
- /* Frame Control + Sequence Number + Address fields + Security Header */
- ldev->hard_header_len = 2 + 1 + 20 + 14;
- ldev->needed_tailroom = 2; /* FCS */
- ldev->mtu = IPV6_MIN_MTU;
- ldev->priv_flags |= IFF_NO_QUEUE;
+ /* We need an ipv6hdr as minimum len when calling xmit */
+ ldev->hard_header_len = sizeof(struct ipv6hdr);
ldev->flags = IFF_BROADCAST | IFF_MULTICAST;
ldev->netdev_ops = &lowpan_netdev_ops;
@@ -156,6 +151,15 @@ static int lowpan_newlink(struct net *src_net, struct net_device *ldev,
lowpan_dev_info(ldev)->wdev = wdev;
/* Set the lowpan hardware address to the wpan hardware address. */
memcpy(ldev->dev_addr, wdev->dev_addr, IEEE802154_ADDR_LEN);
+ /* We need headroom for possible wpan_dev_hard_header call and tailroom
+ * for encryption/fcs handling. The lowpan interface will replace
+ * the IPv6 header with 6LoWPAN header. At worst case the 6LoWPAN
+ * header has LOWPAN_IPHC_MAX_HEADER_LEN more bytes than the IPv6
+ * header.
+ */
+ ldev->needed_headroom = LOWPAN_IPHC_MAX_HEADER_LEN +
+ wdev->needed_headroom;
+ ldev->needed_tailroom = wdev->needed_tailroom;
lowpan_netdev_setup(ldev, LOWPAN_LLTYPE_IEEE802154);
diff --git a/net/ieee802154/6lowpan/rx.c b/net/ieee802154/6lowpan/rx.c
index b1fd47d2802b..65d55e05516c 100644
--- a/net/ieee802154/6lowpan/rx.c
+++ b/net/ieee802154/6lowpan/rx.c
@@ -29,6 +29,8 @@
static int lowpan_give_skb_to_device(struct sk_buff *skb)
{
skb->protocol = htons(ETH_P_IPV6);
+ skb->dev->stats.rx_packets++;
+ skb->dev->stats.rx_bytes += skb->len;
return netif_rx(skb);
}
diff --git a/net/ieee802154/6lowpan/tx.c b/net/ieee802154/6lowpan/tx.c
index 54939d031ea5..62a21f6f021e 100644
--- a/net/ieee802154/6lowpan/tx.c
+++ b/net/ieee802154/6lowpan/tx.c
@@ -10,6 +10,7 @@
#include <net/6lowpan.h>
#include <net/ieee802154_netdev.h>
+#include <net/mac802154.h>
#include "6lowpan_i.h"
@@ -36,6 +37,13 @@ lowpan_addr_info *lowpan_skb_priv(const struct sk_buff *skb)
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)
@@ -71,27 +79,33 @@ int lowpan_header_create(struct sk_buff *skb, struct net_device *ldev,
static struct sk_buff*
lowpan_alloc_frag(struct sk_buff *skb, int size,
- const struct ieee802154_hdr *master_hdr)
+ const struct ieee802154_hdr *master_hdr, bool frag1)
{
struct net_device *wdev = lowpan_dev_info(skb->dev)->wdev;
struct sk_buff *frag;
int rc;
- frag = alloc_skb(wdev->hard_header_len + wdev->needed_tailroom + size,
+ frag = alloc_skb(wdev->needed_headroom + wdev->needed_tailroom + size,
GFP_ATOMIC);
if (likely(frag)) {
frag->dev = wdev;
frag->priority = skb->priority;
- skb_reserve(frag, wdev->hard_header_len);
+ skb_reserve(frag, wdev->needed_headroom);
skb_reset_network_header(frag);
*mac_cb(frag) = *mac_cb(skb);
- rc = dev_hard_header(frag, wdev, 0, &master_hdr->dest,
- &master_hdr->source, size);
- if (rc < 0) {
- kfree_skb(frag);
- return ERR_PTR(rc);
+ if (frag1) {
+ memcpy(skb_put(frag, skb->mac_len),
+ skb_mac_header(skb), skb->mac_len);
+ } else {
+ rc = wpan_dev_hard_header(frag, wdev,
+ &master_hdr->dest,
+ &master_hdr->source, size);
+ if (rc < 0) {
+ kfree_skb(frag);
+ return ERR_PTR(rc);
+ }
}
} else {
frag = ERR_PTR(-ENOMEM);
@@ -103,13 +117,13 @@ lowpan_alloc_frag(struct sk_buff *skb, int size,
static int
lowpan_xmit_fragment(struct sk_buff *skb, const struct ieee802154_hdr *wpan_hdr,
u8 *frag_hdr, int frag_hdrlen,
- int offset, int len)
+ int offset, int len, bool frag1)
{
struct sk_buff *frag;
raw_dump_inline(__func__, " fragment header", frag_hdr, frag_hdrlen);
- frag = lowpan_alloc_frag(skb, frag_hdrlen + len, wpan_hdr);
+ frag = lowpan_alloc_frag(skb, frag_hdrlen + len, wpan_hdr, frag1);
if (IS_ERR(frag))
return PTR_ERR(frag);
@@ -148,7 +162,8 @@ lowpan_xmit_fragmented(struct sk_buff *skb, struct net_device *ldev,
rc = lowpan_xmit_fragment(skb, wpan_hdr, frag_hdr,
LOWPAN_FRAG1_HEAD_SIZE, 0,
- frag_len + skb_network_header_len(skb));
+ frag_len + skb_network_header_len(skb),
+ true);
if (rc) {
pr_debug("%s unable to send FRAG1 packet (tag: %d)",
__func__, ntohs(frag_tag));
@@ -169,7 +184,7 @@ lowpan_xmit_fragmented(struct sk_buff *skb, struct net_device *ldev,
rc = lowpan_xmit_fragment(skb, wpan_hdr, frag_hdr,
LOWPAN_FRAGN_HEAD_SIZE, skb_offset,
- frag_len);
+ frag_len, false);
if (rc) {
pr_debug("%s unable to send a FRAGN packet. (tag: %d, offset: %d)\n",
__func__, ntohs(frag_tag), skb_offset);
@@ -177,6 +192,8 @@ lowpan_xmit_fragmented(struct sk_buff *skb, struct net_device *ldev,
}
} while (skb_unprocessed > frag_cap);
+ ldev->stats.tx_packets++;
+ ldev->stats.tx_bytes += dgram_size;
consume_skb(skb);
return NET_XMIT_SUCCESS;
@@ -228,8 +245,8 @@ static int lowpan_header(struct sk_buff *skb, struct net_device *ldev,
cb->ackreq = wpan_dev->ackreq;
}
- return dev_hard_header(skb, lowpan_dev_info(ldev)->wdev, ETH_P_IPV6,
- (void *)&da, (void *)&sa, 0);
+ return wpan_dev_hard_header(skb, lowpan_dev_info(ldev)->wdev, &da, &sa,
+ 0);
}
netdev_tx_t lowpan_xmit(struct sk_buff *skb, struct net_device *ldev)
@@ -240,6 +257,8 @@ netdev_tx_t lowpan_xmit(struct sk_buff *skb, struct net_device *ldev)
pr_debug("package xmit\n");
+ WARN_ON_ONCE(skb->len > IPV6_MIN_MTU);
+
/* We must take a copy of the skb before we modify/replace the ipv6
* header as the header could be used elsewhere
*/
@@ -262,6 +281,8 @@ netdev_tx_t lowpan_xmit(struct sk_buff *skb, struct net_device *ldev)
if (skb_tail_pointer(skb) - skb_network_header(skb) <= max_single) {
skb->dev = lowpan_dev_info(ldev)->wdev;
+ ldev->stats.tx_packets++;
+ ldev->stats.tx_bytes += dgram_size;
return dev_queue_xmit(skb);
} else {
netdev_tx_t rc;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-12 04:23:56 +0000