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6lowpan: iphc: use ipv6 api to check address scope 

This patch removes the own implementation to check of link-layer,
broadcast and any address type and use the IPv6 api for that.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Alexander Aring 2014-07-29 23:47:02 +02:00 committed by Marcel Holtmann
parent 85c71240a3
commit 556a5bfc03
2 changed files with 17 additions and 25 deletions
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13
include/net/6lowpan.h
View File

@ -75,20 +75,10 @@
(((a)->s6_addr[14]) == (m)[6]) && \
(((a)->s6_addr[15]) == (m)[7]))
/* ipv6 address is unspecified */
#define is_addr_unspecified(a) \
((((a)->s6_addr32[0]) == 0) && \
(((a)->s6_addr32[1]) == 0) && \
(((a)->s6_addr32[2]) == 0) && \
(((a)->s6_addr32[3]) == 0))
/* compare ipv6 addresses prefixes */
#define ipaddr_prefixcmp(addr1, addr2, length) \
(memcmp(addr1, addr2, length >> 3) == 0)
/* local link, i.e. FE80::/10 */
#define is_addr_link_local(a) (((a)->s6_addr16[0]) == htons(0xFE80))
/*
* check whether we can compress the IID to 16 bits,
* it's possible for unicast adresses with first 49 bits are zero only.
@ -100,9 +90,6 @@
(((a)->s6_addr[12]) == 0xfe) && \
(((a)->s6_addr[13]) == 0))
/* multicast address */
#define is_addr_mcast(a) (((a)->s6_addr[0]) == 0xFF)
/* check whether the 112-bit gid of the multicast address is mappable to: */
/* 9 bits, for FF02::1 (all nodes) and FF02::2 (all routers) addresses only. */

29
net/6lowpan/iphc.c
View File

@ -611,6 +611,7 @@ int lowpan_header_compress(struct sk_buff *skb, struct net_device *dev,
u8 tmp, iphc0, iphc1, *hc_ptr;
struct ipv6hdr *hdr;
u8 head[100] = {};
int addr_type;
if (type != ETH_P_IPV6)
return -EINVAL;
@ -720,23 +721,27 @@ int lowpan_header_compress(struct sk_buff *skb, struct net_device *dev,
sizeof(hdr->hop_limit));
}
addr_type = ipv6_addr_type(&hdr->saddr);
/* source address compression */
if (is_addr_unspecified(&hdr->saddr)) {
if (addr_type == IPV6_ADDR_ANY) {
pr_debug("source address is unspecified, setting SAC\n");
iphc1 |= LOWPAN_IPHC_SAC;
/* TODO: context lookup */
} else if (is_addr_link_local(&hdr->saddr)) {
iphc1 |= lowpan_compress_addr_64(&hc_ptr,
LOWPAN_IPHC_SAM_BIT, &hdr->saddr, _saddr);
pr_debug("source address unicast link-local %pI6c "
"iphc1 0x%02x\n", &hdr->saddr, iphc1);
} else {
pr_debug("send the full source address\n");
lowpan_push_hc_data(&hc_ptr, &hdr->saddr.s6_addr[0], 16);
if (addr_type & IPV6_ADDR_LINKLOCAL) {
iphc1 |= lowpan_compress_addr_64(&hc_ptr,
LOWPAN_IPHC_SAM_BIT,
&hdr->saddr, _saddr);
pr_debug("source address unicast link-local %pI6c iphc1 0x%02x\n",
&hdr->saddr, iphc1);
} else {
pr_debug("send the full source address\n");
lowpan_push_hc_data(&hc_ptr, hdr->saddr.s6_addr, 16);
}
}
addr_type = ipv6_addr_type(&hdr->daddr);
/* destination address compression */
if (is_addr_mcast(&hdr->daddr)) {
if (addr_type & IPV6_ADDR_MULTICAST) {
pr_debug("destination address is multicast: ");
iphc1 |= LOWPAN_IPHC_M;
if (lowpan_is_mcast_addr_compressable8(&hdr->daddr)) {
@ -767,8 +772,8 @@ int lowpan_header_compress(struct sk_buff *skb, struct net_device *dev,
lowpan_push_hc_data(&hc_ptr, hdr->daddr.s6_addr, 16);
}
} else {
/* TODO: context lookup */
if (is_addr_link_local(&hdr->daddr)) {
if (addr_type & IPV6_ADDR_LINKLOCAL) {
/* TODO: context lookup */
iphc1 |= lowpan_compress_addr_64(&hc_ptr,
LOWPAN_IPHC_DAM_BIT, &hdr->daddr, _daddr);
pr_debug("dest address unicast link-local %pI6c "