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-rw-r--r--net/6lowpan/iphc.c113
-rw-r--r--net/6lowpan/nhc.c3
-rw-r--r--net/6lowpan/nhc.h3
3 files changed, 73 insertions, 46 deletions
diff --git a/net/6lowpan/iphc.c b/net/6lowpan/iphc.c
index 4e4af8c82296..8f967d3b494e 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 fd20fc51a7c4..589224e458dd 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 c249f17fa37b..e3a564421898 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);
/**
generated by cgit (git 2.34.1) at 2024-05-31 03:33:42 +0000