diff options
| -rw-r--r-- | include/net/6lowpan.h | 24 | ||||
| -rw-r--r-- | include/net/mac802154.h | 10 | ||||
| -rw-r--r-- | net/6lowpan/iphc.c | 113 | ||||
| -rw-r--r-- | net/6lowpan/nhc.c | 3 | ||||
| -rw-r--r-- | net/6lowpan/nhc.h | 3 | ||||
| -rw-r--r-- | net/bluetooth/6lowpan.c | 20 | ||||
| -rw-r--r-- | net/ieee802154/6lowpan/rx.c | 26 |
7 files changed, 103 insertions, 96 deletions
diff --git a/include/net/6lowpan.h b/include/net/6lowpan.h index 6f1e0bd..ac30ad3 100644 --- a/include/net/6lowpan.h +++ b/include/net/6lowpan.h @@ -319,12 +319,24 @@ static inline void lowpan_push_hc_data(u8 **hc_ptr, const void *data, void lowpan_netdev_setup(struct net_device *dev, enum lowpan_lltypes lltype); -int -lowpan_header_decompress(struct sk_buff *skb, struct net_device *dev, - const u8 *saddr, const u8 saddr_type, - const u8 saddr_len, const u8 *daddr, - const u8 daddr_type, const u8 daddr_len, - u8 iphc0, u8 iphc1); +/** + * lowpan_header_decompress - replace 6LoWPAN header with IPv6 header + * + * This function replaces the IPHC 6LoWPAN header which should be pointed at + * skb->data and skb_network_header, with the IPv6 header. + * It would be nice that the caller have the necessary headroom of IPv6 header + * and greatest Transport layer header, this would reduce the overhead for + * reallocate headroom. + * + * @skb: the buffer which should be manipulate. + * @dev: the lowpan net device pointer. + * @daddr: destination lladdr of mac header which is used for compression + * methods. + * @saddr: source lladdr of mac header which is used for compression + * methods. + */ +int lowpan_header_decompress(struct sk_buff *skb, const struct net_device *dev, + const void *daddr, const void *saddr); /** * lowpan_header_compress - replace IPv6 header with 6LoWPAN header diff --git a/include/net/mac802154.h b/include/net/mac802154.h index 5718765..da574bb 100644 --- a/include/net/mac802154.h +++ b/include/net/mac802154.h @@ -277,6 +277,16 @@ static inline void ieee802154_le64_to_be64(void *be64_dst, const void *le64_src) } /** + * ieee802154_le16_to_be16 - copies and convert le16 to be16 + * @be16_dst: be16 destination pointer + * @le16_src: le16 source pointer + */ +static inline void ieee802154_le16_to_be16(void *be16_dst, const void *le16_src) +{ + __put_unaligned_memmove16(swab16p(le16_src), be16_dst); +} + +/** * ieee802154_alloc_hw - Allocate a new hardware device * * This must be called once for each hardware device. The returned pointer diff --git a/net/6lowpan/iphc.c b/net/6lowpan/iphc.c index 4e4af8c..8f967d3 100644 --- a/net/6lowpan/iphc.c +++ b/net/6lowpan/iphc.c @@ -49,21 +49,71 @@ #include <linux/bitops.h> #include <linux/if_arp.h> #include <linux/netdevice.h> + #include <net/6lowpan.h> #include <net/ipv6.h> -#include <net/af_ieee802154.h> + +/* special link-layer handling */ +#include <net/mac802154.h> #include "nhc.h" +static inline void iphc_uncompress_eui64_lladdr(struct in6_addr *ipaddr, + const void *lladdr) +{ + /* fe:80::XXXX:XXXX:XXXX:XXXX + * \_________________/ + * hwaddr + */ + ipaddr->s6_addr[0] = 0xFE; + ipaddr->s6_addr[1] = 0x80; + memcpy(&ipaddr->s6_addr[8], lladdr, EUI64_ADDR_LEN); + /* second bit-flip (Universe/Local) + * is done according RFC2464 + */ + ipaddr->s6_addr[8] ^= 0x02; +} + +static inline void iphc_uncompress_802154_lladdr(struct in6_addr *ipaddr, + const void *lladdr) +{ + const struct ieee802154_addr *addr = lladdr; + u8 eui64[EUI64_ADDR_LEN] = { }; + + switch (addr->mode) { + case IEEE802154_ADDR_LONG: + ieee802154_le64_to_be64(eui64, &addr->extended_addr); + iphc_uncompress_eui64_lladdr(ipaddr, eui64); + break; + case IEEE802154_ADDR_SHORT: + /* fe:80::ff:fe00:XXXX + * \__/ + * short_addr + * + * Universe/Local bit is zero. + */ + ipaddr->s6_addr[0] = 0xFE; + ipaddr->s6_addr[1] = 0x80; + ipaddr->s6_addr[11] = 0xFF; + ipaddr->s6_addr[12] = 0xFE; + ieee802154_le16_to_be16(&ipaddr->s6_addr16[7], + &addr->short_addr); + break; + default: + /* should never handled and filtered by 802154 6lowpan */ + WARN_ON_ONCE(1); + break; + } +} + /* Uncompress address function for source and * destination address(non-multicast). * * address_mode is sam value or dam value. */ -static int uncompress_addr(struct sk_buff *skb, - struct in6_addr *ipaddr, const u8 address_mode, - const u8 *lladdr, const u8 addr_type, - const u8 addr_len) +static int uncompress_addr(struct sk_buff *skb, const struct net_device *dev, + struct in6_addr *ipaddr, u8 address_mode, + const void *lladdr) { bool fail; @@ -88,36 +138,13 @@ static int uncompress_addr(struct sk_buff *skb, break; case LOWPAN_IPHC_ADDR_03: fail = false; - switch (addr_type) { - case IEEE802154_ADDR_LONG: - /* fe:80::XXXX:XXXX:XXXX:XXXX - * \_________________/ - * hwaddr - */ - ipaddr->s6_addr[0] = 0xFE; - ipaddr->s6_addr[1] = 0x80; - memcpy(&ipaddr->s6_addr[8], lladdr, addr_len); - /* second bit-flip (Universe/Local) - * is done according RFC2464 - */ - ipaddr->s6_addr[8] ^= 0x02; - break; - case IEEE802154_ADDR_SHORT: - /* fe:80::ff:fe00:XXXX - * \__/ - * short_addr - * - * Universe/Local bit is zero. - */ - ipaddr->s6_addr[0] = 0xFE; - ipaddr->s6_addr[1] = 0x80; - ipaddr->s6_addr[11] = 0xFF; - ipaddr->s6_addr[12] = 0xFE; - ipaddr->s6_addr16[7] = htons(*((u16 *)lladdr)); + switch (lowpan_priv(dev)->lltype) { + case LOWPAN_LLTYPE_IEEE802154: + iphc_uncompress_802154_lladdr(ipaddr, lladdr); break; default: - pr_debug("Invalid addr_type set\n"); - return -EINVAL; + iphc_uncompress_eui64_lladdr(ipaddr, lladdr); + break; } break; default: @@ -228,20 +255,20 @@ static int lowpan_uncompress_multicast_daddr(struct sk_buff *skb, /* TTL uncompression values */ static const u8 lowpan_ttl_values[] = { 0, 1, 64, 255 }; -int -lowpan_header_decompress(struct sk_buff *skb, struct net_device *dev, - const u8 *saddr, const u8 saddr_type, - const u8 saddr_len, const u8 *daddr, - const u8 daddr_type, const u8 daddr_len, - u8 iphc0, u8 iphc1) +int lowpan_header_decompress(struct sk_buff *skb, const struct net_device *dev, + const void *daddr, const void *saddr) { struct ipv6hdr hdr = {}; - u8 tmp, num_context = 0; + u8 iphc0, iphc1, tmp, num_context = 0; int err; raw_dump_table(__func__, "raw skb data dump uncompressed", skb->data, skb->len); + if (lowpan_fetch_skb_u8(skb, &iphc0) || + lowpan_fetch_skb_u8(skb, &iphc1)) + return -EINVAL; + /* another if the CID flag is set */ if (iphc1 & LOWPAN_IPHC_CID) { pr_debug("CID flag is set, increase header with one\n"); @@ -323,8 +350,7 @@ lowpan_header_decompress(struct sk_buff *skb, struct net_device *dev, } else { /* Source address uncompression */ pr_debug("source address stateless compression\n"); - err = uncompress_addr(skb, &hdr.saddr, tmp, saddr, - saddr_type, saddr_len); + err = uncompress_addr(skb, dev, &hdr.saddr, tmp, saddr); } /* Check on error of previous branch */ @@ -347,8 +373,7 @@ lowpan_header_decompress(struct sk_buff *skb, struct net_device *dev, return -EINVAL; } } else { - err = uncompress_addr(skb, &hdr.daddr, tmp, daddr, - daddr_type, daddr_len); + err = uncompress_addr(skb, dev, &hdr.daddr, tmp, daddr); pr_debug("dest: stateless compression mode %d dest %pI6c\n", tmp, &hdr.daddr); if (err) diff --git a/net/6lowpan/nhc.c b/net/6lowpan/nhc.c index fd20fc5..589224e 100644 --- a/net/6lowpan/nhc.c +++ b/net/6lowpan/nhc.c @@ -157,7 +157,8 @@ out: return ret; } -int lowpan_nhc_do_uncompression(struct sk_buff *skb, struct net_device *dev, +int lowpan_nhc_do_uncompression(struct sk_buff *skb, + const struct net_device *dev, struct ipv6hdr *hdr) { struct lowpan_nhc *nhc; diff --git a/net/6lowpan/nhc.h b/net/6lowpan/nhc.h index c249f17..e3a5644 100644 --- a/net/6lowpan/nhc.h +++ b/net/6lowpan/nhc.h @@ -119,7 +119,8 @@ int lowpan_nhc_do_compression(struct sk_buff *skb, const struct ipv6hdr *hdr, * @dev: netdevice for print logging information. * @hdr: ipv6hdr for setting nexthdr value. */ -int lowpan_nhc_do_uncompression(struct sk_buff *skb, struct net_device *dev, +int lowpan_nhc_do_uncompression(struct sk_buff *skb, + const struct net_device *dev, struct ipv6hdr *hdr); /** diff --git a/net/bluetooth/6lowpan.c b/net/bluetooth/6lowpan.c index e2b66f3..4057d6e 100644 --- a/net/bluetooth/6lowpan.c +++ b/net/bluetooth/6lowpan.c @@ -21,8 +21,6 @@ #include <net/ip6_route.h> #include <net/addrconf.h> -#include <net/af_ieee802154.h> /* to get the address type */ - #include <net/bluetooth/bluetooth.h> #include <net/bluetooth/hci_core.h> #include <net/bluetooth/l2cap.h> @@ -272,7 +270,6 @@ static int iphc_decompress(struct sk_buff *skb, struct net_device *netdev, struct l2cap_chan *chan) { const u8 *saddr, *daddr; - u8 iphc0, iphc1; struct lowpan_dev *dev; struct lowpan_peer *peer; @@ -287,22 +284,7 @@ static int iphc_decompress(struct sk_buff *skb, struct net_device *netdev, saddr = peer->eui64_addr; daddr = dev->netdev->dev_addr; - /* at least two bytes will be used for the encoding */ - if (skb->len < 2) - return -EINVAL; - - if (lowpan_fetch_skb_u8(skb, &iphc0)) - return -EINVAL; - - if (lowpan_fetch_skb_u8(skb, &iphc1)) - return -EINVAL; - - return lowpan_header_decompress(skb, netdev, - saddr, IEEE802154_ADDR_LONG, - EUI64_ADDR_LEN, daddr, - IEEE802154_ADDR_LONG, EUI64_ADDR_LEN, - iphc0, iphc1); - + return lowpan_header_decompress(skb, netdev, daddr, saddr); } static int recv_pkt(struct sk_buff *skb, struct net_device *dev, diff --git a/net/ieee802154/6lowpan/rx.c b/net/ieee802154/6lowpan/rx.c index 65d55e0..403f171 100644 --- a/net/ieee802154/6lowpan/rx.c +++ b/net/ieee802154/6lowpan/rx.c @@ -90,36 +90,12 @@ static lowpan_rx_result lowpan_rx_h_frag(struct sk_buff *skb) int lowpan_iphc_decompress(struct sk_buff *skb) { - struct ieee802154_addr_sa sa, da; struct ieee802154_hdr hdr; - u8 iphc0, iphc1; - void *sap, *dap; if (ieee802154_hdr_peek_addrs(skb, &hdr) < 0) return -EINVAL; - raw_dump_table(__func__, "raw skb data dump", skb->data, skb->len); - - if (lowpan_fetch_skb_u8(skb, &iphc0) || - lowpan_fetch_skb_u8(skb, &iphc1)) - return -EINVAL; - - ieee802154_addr_to_sa(&sa, &hdr.source); - ieee802154_addr_to_sa(&da, &hdr.dest); - - if (sa.addr_type == IEEE802154_ADDR_SHORT) - sap = &sa.short_addr; - else - sap = &sa.hwaddr; - - if (da.addr_type == IEEE802154_ADDR_SHORT) - dap = &da.short_addr; - else - dap = &da.hwaddr; - - return lowpan_header_decompress(skb, skb->dev, sap, sa.addr_type, - IEEE802154_ADDR_LEN, dap, da.addr_type, - IEEE802154_ADDR_LEN, iphc0, iphc1); + return lowpan_header_decompress(skb, skb->dev, &hdr.dest, &hdr.source); } static lowpan_rx_result lowpan_rx_h_iphc(struct sk_buff *skb) |
