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5f509239ec
This reverts commit 9abc378c66e3d6f437eed77c1c534cbc183523f7
("ieee802154: 6lowpan: change datagram var types").
The reason is that I forgot the IPv6 fragmentation here. Our MTU of
lowpan interface is 1280 and skb->len should not above of that. If we
reach a payload above 1280 in IPv6 header then we have a IPv6
fragmentation above 802.15.4 6LoWPAN fragmentation. The type "u16" was
fine, instead I added now a WARN_ON_ONCE if skb->len is above MTU which
should never happen otherwise IPv6 on minimum MTU size is broken.
Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
78 lines
1.9 KiB
C
78 lines
1.9 KiB
C
#ifndef __IEEE802154_6LOWPAN_I_H__
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#define __IEEE802154_6LOWPAN_I_H__
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#include <linux/list.h>
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#include <net/ieee802154_netdev.h>
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#include <net/inet_frag.h>
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#include <net/6lowpan.h>
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typedef unsigned __bitwise__ lowpan_rx_result;
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#define RX_CONTINUE ((__force lowpan_rx_result) 0u)
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#define RX_DROP_UNUSABLE ((__force lowpan_rx_result) 1u)
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#define RX_DROP ((__force lowpan_rx_result) 2u)
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#define RX_QUEUED ((__force lowpan_rx_result) 3u)
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#define LOWPAN_DISPATCH_FRAG1 0xc0
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#define LOWPAN_DISPATCH_FRAGN 0xe0
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struct lowpan_create_arg {
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u16 tag;
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u16 d_size;
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const struct ieee802154_addr *src;
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const struct ieee802154_addr *dst;
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};
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/* Equivalent of ipv4 struct ip
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*/
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struct lowpan_frag_queue {
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struct inet_frag_queue q;
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u16 tag;
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u16 d_size;
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struct ieee802154_addr saddr;
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struct ieee802154_addr daddr;
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};
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static inline u32 ieee802154_addr_hash(const struct ieee802154_addr *a)
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{
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switch (a->mode) {
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case IEEE802154_ADDR_LONG:
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return (((__force u64)a->extended_addr) >> 32) ^
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(((__force u64)a->extended_addr) & 0xffffffff);
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case IEEE802154_ADDR_SHORT:
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return (__force u32)(a->short_addr);
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default:
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return 0;
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}
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}
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/* private device info */
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struct lowpan_dev_info {
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struct net_device *wdev; /* wpan device ptr */
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u16 fragment_tag;
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};
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static inline struct
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lowpan_dev_info *lowpan_dev_info(const struct net_device *dev)
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{
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return (struct lowpan_dev_info *)lowpan_priv(dev)->priv;
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}
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int lowpan_frag_rcv(struct sk_buff *skb, const u8 frag_type);
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void lowpan_net_frag_exit(void);
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int lowpan_net_frag_init(void);
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void lowpan_rx_init(void);
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void lowpan_rx_exit(void);
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int lowpan_header_create(struct sk_buff *skb, struct net_device *dev,
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unsigned short type, const void *_daddr,
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const void *_saddr, unsigned int len);
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netdev_tx_t lowpan_xmit(struct sk_buff *skb, struct net_device *dev);
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int lowpan_iphc_decompress(struct sk_buff *skb);
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lowpan_rx_result lowpan_rx_h_ipv6(struct sk_buff *skb);
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#endif /* __IEEE802154_6LOWPAN_I_H__ */
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