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6lowpan: iphc: cleanup use of lowpan_push_hc_data 

This patch uses the lowpan_push_hc_data functions in several places
where we can use it. The lowpan_push_hc_data was introduced in some
previous patches.

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 23:47:01 +02:00 коммит произвёл Marcel Holtmann
Родитель 4ebc960f94
Коммит 85c71240a3
1 изменённых файлов: 20 добавлений и 25 удалений
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45
net/6lowpan/iphc.c
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@ -532,15 +532,13 @@ static u8 lowpan_compress_addr_64(u8 **hc_ptr, u8 shift,
pr_debug("address compression 0 bits\n");
} else if (lowpan_is_iid_16_bit_compressable(ipaddr)) {
/* compress IID to 16 bits xxxx::XXXX */
memcpy(*hc_ptr, &ipaddr->s6_addr16[7], 2);
*hc_ptr += 2;
lowpan_push_hc_data(hc_ptr, &ipaddr->s6_addr16[7], 2);
val = 2; /* 16-bits */
raw_dump_inline(NULL, "Compressed ipv6 addr is (16 bits)",
*hc_ptr - 2, 2);
} else {
/* do not compress IID => xxxx::IID */
memcpy(*hc_ptr, &ipaddr->s6_addr16[4], 8);
*hc_ptr += 8;
lowpan_push_hc_data(hc_ptr, &ipaddr->s6_addr16[4], 8);
val = 1; /* 64-bits */
raw_dump_inline(NULL, "Compressed ipv6 addr is (64 bits)",
*hc_ptr - 8, 8);
@ -696,10 +694,9 @@ int lowpan_header_compress(struct sk_buff *skb, struct net_device *dev,
if (hdr->nexthdr == UIP_PROTO_UDP)
iphc0 |= LOWPAN_IPHC_NH_C;
if ((iphc0 & LOWPAN_IPHC_NH_C) == 0) {
*hc_ptr = hdr->nexthdr;
hc_ptr += 1;
}
if ((iphc0 & LOWPAN_IPHC_NH_C) == 0)
lowpan_push_hc_data(&hc_ptr, &hdr->nexthdr,
sizeof(hdr->nexthdr));
/*
* Hop limit
@ -719,9 +716,8 @@ int lowpan_header_compress(struct sk_buff *skb, struct net_device *dev,
iphc0 |= LOWPAN_IPHC_TTL_255;
break;
default:
*hc_ptr = hdr->hop_limit;
hc_ptr += 1;
break;
lowpan_push_hc_data(&hc_ptr, &hdr->hop_limit,
sizeof(hdr->hop_limit));
}
/* source address compression */
@ -736,8 +732,7 @@ int lowpan_header_compress(struct sk_buff *skb, struct net_device *dev,
"iphc1 0x%02x\n", &hdr->saddr, iphc1);
} else {
pr_debug("send the full source address\n");
memcpy(hc_ptr, &hdr->saddr.s6_addr16[0], 16);
hc_ptr += 16;
lowpan_push_hc_data(&hc_ptr, &hdr->saddr.s6_addr[0], 16);
}
/* destination address compression */
@ -748,27 +743,28 @@ int lowpan_header_compress(struct sk_buff *skb, struct net_device *dev,
pr_debug("compressed to 1 octet\n");
iphc1 |= LOWPAN_IPHC_DAM_11;
/* use last byte */
*hc_ptr = hdr->daddr.s6_addr[15];
hc_ptr += 1;
lowpan_push_hc_data(&hc_ptr,
&hdr->daddr.s6_addr[15], 1);
} else if (lowpan_is_mcast_addr_compressable32(&hdr->daddr)) {
pr_debug("compressed to 4 octets\n");
iphc1 |= LOWPAN_IPHC_DAM_10;
/* second byte + the last three */
*hc_ptr = hdr->daddr.s6_addr[1];
memcpy(hc_ptr + 1, &hdr->daddr.s6_addr[13], 3);
hc_ptr += 4;
lowpan_push_hc_data(&hc_ptr,
&hdr->daddr.s6_addr[1], 1);
lowpan_push_hc_data(&hc_ptr,
&hdr->daddr.s6_addr[13], 3);
} else if (lowpan_is_mcast_addr_compressable48(&hdr->daddr)) {
pr_debug("compressed to 6 octets\n");
iphc1 |= LOWPAN_IPHC_DAM_01;
/* second byte + the last five */
*hc_ptr = hdr->daddr.s6_addr[1];
memcpy(hc_ptr + 1, &hdr->daddr.s6_addr[11], 5);
hc_ptr += 6;
lowpan_push_hc_data(&hc_ptr,
&hdr->daddr.s6_addr[1], 1);
lowpan_push_hc_data(&hc_ptr,
&hdr->daddr.s6_addr[11], 5);
} else {
pr_debug("using full address\n");
iphc1 |= LOWPAN_IPHC_DAM_00;
memcpy(hc_ptr, &hdr->daddr.s6_addr[0], 16);
hc_ptr += 16;
lowpan_push_hc_data(&hc_ptr, hdr->daddr.s6_addr, 16);
}
} else {
/* TODO: context lookup */
@ -779,8 +775,7 @@ int lowpan_header_compress(struct sk_buff *skb, struct net_device *dev,
"iphc1 0x%02x\n", &hdr->daddr, iphc1);
} else {
pr_debug("dest address unicast %pI6c\n", &hdr->daddr);
memcpy(hc_ptr, &hdr->daddr.s6_addr16[0], 16);
hc_ptr += 16;
lowpan_push_hc_data(&hc_ptr, hdr->daddr.s6_addr, 16);
}
}