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-rw-r--r--net/6lowpan/iphc.c122
1 files changed, 58 insertions, 64 deletions
diff --git a/net/6lowpan/iphc.c b/net/6lowpan/iphc.c
index 99bb22aea346..8501dd532fe1 100644
--- a/net/6lowpan/iphc.c
+++ b/net/6lowpan/iphc.c
@@ -53,9 +53,6 @@
#include <net/6lowpan.h>
#include <net/ipv6.h>
-/* special link-layer handling */
-#include <net/mac802154.h>
-
#include "6lowpan_i.h"
#include "nhc.h"
@@ -148,35 +145,25 @@
(((a)->s6_addr16[6]) == 0) && \
(((a)->s6_addr[14]) == 0))
+#define lowpan_is_linklocal_zero_padded(a) \
+ (!(hdr->saddr.s6_addr[1] & 0x3f) && \
+ !hdr->saddr.s6_addr16[1] && \
+ !hdr->saddr.s6_addr32[1])
+
#define LOWPAN_IPHC_CID_DCI(cid) (cid & 0x0f)
#define LOWPAN_IPHC_CID_SCI(cid) ((cid & 0xf0) >> 4)
-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)
+static inline void
+lowpan_iphc_uncompress_802154_lladdr(struct in6_addr *ipaddr,
+ const void *lladdr)
{
const struct ieee802154_addr *addr = lladdr;
- u8 eui64[EUI64_ADDR_LEN] = { };
+ 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);
+ lowpan_iphc_uncompress_eui64_lladdr(ipaddr, eui64);
break;
case IEEE802154_ADDR_SHORT:
/* fe:80::ff:fe00:XXXX
@@ -202,7 +189,7 @@ static inline void iphc_uncompress_802154_lladdr(struct in6_addr *ipaddr,
static struct lowpan_iphc_ctx *
lowpan_iphc_ctx_get_by_id(const struct net_device *dev, u8 id)
{
- struct lowpan_iphc_ctx *ret = &lowpan_priv(dev)->ctx.table[id];
+ struct lowpan_iphc_ctx *ret = &lowpan_dev(dev)->ctx.table[id];
if (!lowpan_iphc_ctx_is_active(ret))
return NULL;
@@ -214,7 +201,7 @@ static struct lowpan_iphc_ctx *
lowpan_iphc_ctx_get_by_addr(const struct net_device *dev,
const struct in6_addr *addr)
{
- struct lowpan_iphc_ctx *table = lowpan_priv(dev)->ctx.table;
+ struct lowpan_iphc_ctx *table = lowpan_dev(dev)->ctx.table;
struct lowpan_iphc_ctx *ret = NULL;
struct in6_addr addr_pfx;
u8 addr_plen;
@@ -258,7 +245,7 @@ static struct lowpan_iphc_ctx *
lowpan_iphc_ctx_get_by_mcast_addr(const struct net_device *dev,
const struct in6_addr *addr)
{
- struct lowpan_iphc_ctx *table = lowpan_priv(dev)->ctx.table;
+ struct lowpan_iphc_ctx *table = lowpan_dev(dev)->ctx.table;
struct lowpan_iphc_ctx *ret = NULL;
struct in6_addr addr_mcast, network_pfx = {};
int i;
@@ -296,9 +283,10 @@ lowpan_iphc_ctx_get_by_mcast_addr(const struct net_device *dev,
*
* address_mode is the masked value for sam or dam value
*/
-static int uncompress_addr(struct sk_buff *skb, const struct net_device *dev,
- struct in6_addr *ipaddr, u8 address_mode,
- const void *lladdr)
+static int lowpan_iphc_uncompress_addr(struct sk_buff *skb,
+ const struct net_device *dev,
+ struct in6_addr *ipaddr,
+ u8 address_mode, const void *lladdr)
{
bool fail;
@@ -327,12 +315,12 @@ static int uncompress_addr(struct sk_buff *skb, const struct net_device *dev,
case LOWPAN_IPHC_SAM_11:
case LOWPAN_IPHC_DAM_11:
fail = false;
- switch (lowpan_priv(dev)->lltype) {
+ switch (lowpan_dev(dev)->lltype) {
case LOWPAN_LLTYPE_IEEE802154:
- iphc_uncompress_802154_lladdr(ipaddr, lladdr);
+ lowpan_iphc_uncompress_802154_lladdr(ipaddr, lladdr);
break;
default:
- iphc_uncompress_eui64_lladdr(ipaddr, lladdr);
+ lowpan_iphc_uncompress_eui64_lladdr(ipaddr, lladdr);
break;
}
break;
@@ -355,11 +343,11 @@ static int uncompress_addr(struct sk_buff *skb, const struct net_device *dev,
/* Uncompress address function for source context
* based address(non-multicast).
*/
-static int uncompress_ctx_addr(struct sk_buff *skb,
- const struct net_device *dev,
- const struct lowpan_iphc_ctx *ctx,
- struct in6_addr *ipaddr, u8 address_mode,
- const void *lladdr)
+static int lowpan_iphc_uncompress_ctx_addr(struct sk_buff *skb,
+ const struct net_device *dev,
+ const struct lowpan_iphc_ctx *ctx,
+ struct in6_addr *ipaddr,
+ u8 address_mode, const void *lladdr)
{
bool fail;
@@ -388,12 +376,12 @@ static int uncompress_ctx_addr(struct sk_buff *skb,
case LOWPAN_IPHC_SAM_11:
case LOWPAN_IPHC_DAM_11:
fail = false;
- switch (lowpan_priv(dev)->lltype) {
+ switch (lowpan_dev(dev)->lltype) {
case LOWPAN_LLTYPE_IEEE802154:
- iphc_uncompress_802154_lladdr(ipaddr, lladdr);
+ lowpan_iphc_uncompress_802154_lladdr(ipaddr, lladdr);
break;
default:
- iphc_uncompress_eui64_lladdr(ipaddr, lladdr);
+ lowpan_iphc_uncompress_eui64_lladdr(ipaddr, lladdr);
break;
}
ipv6_addr_prefix_copy(ipaddr, &ctx->pfx, ctx->plen);
@@ -652,22 +640,24 @@ int lowpan_header_decompress(struct sk_buff *skb, const struct net_device *dev,
}
if (iphc1 & LOWPAN_IPHC_SAC) {
- spin_lock_bh(&lowpan_priv(dev)->ctx.lock);
+ spin_lock_bh(&lowpan_dev(dev)->ctx.lock);
ci = lowpan_iphc_ctx_get_by_id(dev, LOWPAN_IPHC_CID_SCI(cid));
if (!ci) {
- spin_unlock_bh(&lowpan_priv(dev)->ctx.lock);
+ spin_unlock_bh(&lowpan_dev(dev)->ctx.lock);
return -EINVAL;
}
pr_debug("SAC bit is set. Handle context based source address.\n");
- err = uncompress_ctx_addr(skb, dev, ci, &hdr.saddr,
- iphc1 & LOWPAN_IPHC_SAM_MASK, saddr);
- spin_unlock_bh(&lowpan_priv(dev)->ctx.lock);
+ err = lowpan_iphc_uncompress_ctx_addr(skb, dev, ci, &hdr.saddr,
+ iphc1 & LOWPAN_IPHC_SAM_MASK,
+ saddr);
+ spin_unlock_bh(&lowpan_dev(dev)->ctx.lock);
} else {
/* Source address uncompression */
pr_debug("source address stateless compression\n");
- err = uncompress_addr(skb, dev, &hdr.saddr,
- iphc1 & LOWPAN_IPHC_SAM_MASK, saddr);
+ err = lowpan_iphc_uncompress_addr(skb, dev, &hdr.saddr,
+ iphc1 & LOWPAN_IPHC_SAM_MASK,
+ saddr);
}
/* Check on error of previous branch */
@@ -676,10 +666,10 @@ int lowpan_header_decompress(struct sk_buff *skb, const struct net_device *dev,
switch (iphc1 & (LOWPAN_IPHC_M | LOWPAN_IPHC_DAC)) {
case LOWPAN_IPHC_M | LOWPAN_IPHC_DAC:
- spin_lock_bh(&lowpan_priv(dev)->ctx.lock);
+ spin_lock_bh(&lowpan_dev(dev)->ctx.lock);
ci = lowpan_iphc_ctx_get_by_id(dev, LOWPAN_IPHC_CID_DCI(cid));
if (!ci) {
- spin_unlock_bh(&lowpan_priv(dev)->ctx.lock);
+ spin_unlock_bh(&lowpan_dev(dev)->ctx.lock);
return -EINVAL;
}
@@ -688,7 +678,7 @@ int lowpan_header_decompress(struct sk_buff *skb, const struct net_device *dev,
err = lowpan_uncompress_multicast_ctx_daddr(skb, ci,
&hdr.daddr,
iphc1 & LOWPAN_IPHC_DAM_MASK);
- spin_unlock_bh(&lowpan_priv(dev)->ctx.lock);
+ spin_unlock_bh(&lowpan_dev(dev)->ctx.lock);
break;
case LOWPAN_IPHC_M:
/* multicast */
@@ -696,22 +686,24 @@ int lowpan_header_decompress(struct sk_buff *skb, const struct net_device *dev,
iphc1 & LOWPAN_IPHC_DAM_MASK);
break;
case LOWPAN_IPHC_DAC:
- spin_lock_bh(&lowpan_priv(dev)->ctx.lock);
+ spin_lock_bh(&lowpan_dev(dev)->ctx.lock);
ci = lowpan_iphc_ctx_get_by_id(dev, LOWPAN_IPHC_CID_DCI(cid));
if (!ci) {
- spin_unlock_bh(&lowpan_priv(dev)->ctx.lock);
+ spin_unlock_bh(&lowpan_dev(dev)->ctx.lock);
return -EINVAL;
}
/* Destination address context based uncompression */
pr_debug("DAC bit is set. Handle context based destination address.\n");
- err = uncompress_ctx_addr(skb, dev, ci, &hdr.daddr,
- iphc1 & LOWPAN_IPHC_DAM_MASK, daddr);
- spin_unlock_bh(&lowpan_priv(dev)->ctx.lock);
+ err = lowpan_iphc_uncompress_ctx_addr(skb, dev, ci, &hdr.daddr,
+ iphc1 & LOWPAN_IPHC_DAM_MASK,
+ daddr);
+ spin_unlock_bh(&lowpan_dev(dev)->ctx.lock);
break;
default:
- err = uncompress_addr(skb, dev, &hdr.daddr,
- iphc1 & LOWPAN_IPHC_DAM_MASK, daddr);
+ err = lowpan_iphc_uncompress_addr(skb, dev, &hdr.daddr,
+ iphc1 & LOWPAN_IPHC_DAM_MASK,
+ daddr);
pr_debug("dest: stateless compression mode %d dest %pI6c\n",
iphc1 & LOWPAN_IPHC_DAM_MASK, &hdr.daddr);
break;
@@ -731,7 +723,7 @@ int lowpan_header_decompress(struct sk_buff *skb, const struct net_device *dev,
return err;
}
- switch (lowpan_priv(dev)->lltype) {
+ switch (lowpan_dev(dev)->lltype) {
case LOWPAN_LLTYPE_IEEE802154:
if (lowpan_802154_cb(skb)->d_size)
hdr.payload_len = htons(lowpan_802154_cb(skb)->d_size -
@@ -1028,7 +1020,7 @@ int lowpan_header_compress(struct sk_buff *skb, const struct net_device *dev,
skb->data, skb->len);
ipv6_daddr_type = ipv6_addr_type(&hdr->daddr);
- spin_lock_bh(&lowpan_priv(dev)->ctx.lock);
+ spin_lock_bh(&lowpan_dev(dev)->ctx.lock);
if (ipv6_daddr_type & IPV6_ADDR_MULTICAST)
dci = lowpan_iphc_ctx_get_by_mcast_addr(dev, &hdr->daddr);
else
@@ -1037,15 +1029,15 @@ int lowpan_header_compress(struct sk_buff *skb, const struct net_device *dev,
memcpy(&dci_entry, dci, sizeof(*dci));
cid |= dci->id;
}
- spin_unlock_bh(&lowpan_priv(dev)->ctx.lock);
+ spin_unlock_bh(&lowpan_dev(dev)->ctx.lock);
- spin_lock_bh(&lowpan_priv(dev)->ctx.lock);
+ spin_lock_bh(&lowpan_dev(dev)->ctx.lock);
sci = lowpan_iphc_ctx_get_by_addr(dev, &hdr->saddr);
if (sci) {
memcpy(&sci_entry, sci, sizeof(*sci));
cid |= (sci->id << 4);
}
- spin_unlock_bh(&lowpan_priv(dev)->ctx.lock);
+ spin_unlock_bh(&lowpan_dev(dev)->ctx.lock);
/* if cid is zero it will be compressed */
if (cid) {
@@ -1101,7 +1093,8 @@ int lowpan_header_compress(struct sk_buff *skb, const struct net_device *dev,
true);
iphc1 |= LOWPAN_IPHC_SAC;
} else {
- if (ipv6_saddr_type & IPV6_ADDR_LINKLOCAL) {
+ if (ipv6_saddr_type & IPV6_ADDR_LINKLOCAL &&
+ lowpan_is_linklocal_zero_padded(hdr->saddr)) {
iphc1 |= lowpan_compress_addr_64(&hc_ptr,
&hdr->saddr,
saddr, true);
@@ -1135,7 +1128,8 @@ int lowpan_header_compress(struct sk_buff *skb, const struct net_device *dev,
false);
iphc1 |= LOWPAN_IPHC_DAC;
} else {
- if (ipv6_daddr_type & IPV6_ADDR_LINKLOCAL) {
+ if (ipv6_daddr_type & IPV6_ADDR_LINKLOCAL &&
+ lowpan_is_linklocal_zero_padded(hdr->daddr)) {
iphc1 |= lowpan_compress_addr_64(&hc_ptr,
&hdr->daddr,
daddr, false);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-30 00:59:01 +0000