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Commit 8715fb36 authored by David S. Miller's avatar David S. Miller
Browse files

Merge branch '6lowpan' 



Alexander Aring says:

====================
This patch series cleanup the 6LoWPAN header creation and extend the use
of skb_*_header functions.

Patch 2/4 fix issues of parsing the mac header. The ieee802.15.4 header
has a dynamic size which depends on frame control bits. This patch replaces the
static mac header len calculation with a dynamic one.
====================

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parents ba486502 3582b900

net/ieee802154/6lowpan.c

+11 −21
Original line number Diff line number Diff line
@@ -654,7 +654,9 @@ static int lowpan_header_create(struct sk_buff *skb, 
	head[1] = iphc1;



	skb_pull(skb, sizeof(struct ipv6hdr));

	skb_reset_transport_header(skb);

	memcpy(skb_push(skb, hc06_ptr - head), head, hc06_ptr - head);

	skb_reset_network_header(skb);



	lowpan_raw_dump_table(__func__, "raw skb data dump", skb->data,

				skb->len);
@@ -737,7 +739,6 @@ static int lowpan_skb_deliver(struct sk_buff *skb, struct ipv6hdr *hdr) 
		return -ENOMEM;



	skb_push(new, sizeof(struct ipv6hdr));

	skb_reset_network_header(new);

	skb_copy_to_linear_data(new, hdr, sizeof(struct ipv6hdr));



	new->protocol = htons(ETH_P_IPV6);
@@ -1059,7 +1060,6 @@ lowpan_process_data(struct sk_buff *skb) 
		skb = new;



		skb_push(skb, sizeof(struct udphdr));

		skb_reset_transport_header(skb);

		skb_copy_to_linear_data(skb, &uh, sizeof(struct udphdr));



		lowpan_raw_dump_table(__func__, "raw UDP header dump",
@@ -1102,17 +1102,6 @@ static int lowpan_set_address(struct net_device *dev, void *p) 
	return 0;

}



static int lowpan_get_mac_header_length(struct sk_buff *skb)

{

	/*

	 * Currently long addressing mode is supported only, so the overall

	 * header size is 21:

	 * FC SeqNum DPAN DA  SA  Sec

	 * 2  +  1  +  2 + 8 + 8 + 0  = 21

	 */

	return 21;

}



static int

lowpan_fragment_xmit(struct sk_buff *skb, u8 *head,

			int mlen, int plen, int offset, int type)
@@ -1133,12 +1122,15 @@ lowpan_fragment_xmit(struct sk_buff *skb, u8 *head, 
	frag->priority = skb->priority;



	/* copy header, MFR and payload */

	memcpy(skb_put(frag, mlen), skb->data, mlen);

	memcpy(skb_put(frag, hlen), head, hlen);

	skb_put(frag, mlen);

	skb_copy_to_linear_data(frag, skb_mac_header(skb), mlen);



	skb_put(frag, hlen);

	skb_copy_to_linear_data_offset(frag, mlen, head, hlen);



	if (plen)

		skb_copy_from_linear_data_offset(skb, offset + mlen,

					skb_put(frag, plen), plen);

	skb_put(frag, plen);

	skb_copy_to_linear_data_offset(frag, mlen + hlen,

				       skb_network_header(skb) + offset, plen);



	lowpan_raw_dump_table(__func__, " raw fragment dump", frag->data,

								frag->len);
@@ -1152,7 +1144,7 @@ lowpan_skb_fragmentation(struct sk_buff *skb, struct net_device *dev) 
	int  err, header_length, payload_length, tag, offset = 0;

	u8 head[5];



	header_length = lowpan_get_mac_header_length(skb);

	header_length = skb->mac_len;

	payload_length = skb->len - header_length;

	tag = lowpan_dev_info(dev)->fragment_tag++;
@@ -1323,8 +1315,6 @@ static int lowpan_rcv(struct sk_buff *skb, struct net_device *dev, 


		/* Pull off the 1-byte of 6lowpan header. */

		skb_pull(local_skb, 1);

		skb_reset_network_header(local_skb);

		skb_set_transport_header(local_skb, sizeof(struct ipv6hdr));



		lowpan_give_skb_to_devices(local_skb);

net/mac802154/wpan.c

+2 −0
Original line number Diff line number Diff line
@@ -208,6 +208,8 @@ static int mac802154_header_create(struct sk_buff *skb, 
	head[1] = fc >> 8;



	memcpy(skb_push(skb, pos), head, pos);

	skb_reset_mac_header(skb);

	skb->mac_len = pos;



	return pos;

}