mirror of
https://github.com/torvalds/linux.git
synced 2024-10-24 06:01:01 +00:00
6lowpan: iphc: rename hc06_ptr pointer to hc_ptr
The hc06_ptr pointer variable stands for header compression draft-06. We are mostly rfc complaint. This patch rename the variable to normal hc_ptr. Signed-off-by: Alexander Aring <alex.aring@gmail.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
parent
616d55be4c
commit
84ca5e036f
|
@ -515,9 +515,9 @@ drop:
|
||||||
}
|
}
|
||||||
EXPORT_SYMBOL_GPL(lowpan_process_data);
|
EXPORT_SYMBOL_GPL(lowpan_process_data);
|
||||||
|
|
||||||
static u8 lowpan_compress_addr_64(u8 **hc06_ptr, u8 shift,
|
static u8 lowpan_compress_addr_64(u8 **hc_ptr, u8 shift,
|
||||||
const struct in6_addr *ipaddr,
|
const struct in6_addr *ipaddr,
|
||||||
const unsigned char *lladdr)
|
const unsigned char *lladdr)
|
||||||
{
|
{
|
||||||
u8 val = 0;
|
u8 val = 0;
|
||||||
|
|
||||||
|
@ -526,24 +526,24 @@ static u8 lowpan_compress_addr_64(u8 **hc06_ptr, u8 shift,
|
||||||
pr_debug("address compression 0 bits\n");
|
pr_debug("address compression 0 bits\n");
|
||||||
} else if (lowpan_is_iid_16_bit_compressable(ipaddr)) {
|
} else if (lowpan_is_iid_16_bit_compressable(ipaddr)) {
|
||||||
/* compress IID to 16 bits xxxx::XXXX */
|
/* compress IID to 16 bits xxxx::XXXX */
|
||||||
memcpy(*hc06_ptr, &ipaddr->s6_addr16[7], 2);
|
memcpy(*hc_ptr, &ipaddr->s6_addr16[7], 2);
|
||||||
*hc06_ptr += 2;
|
*hc_ptr += 2;
|
||||||
val = 2; /* 16-bits */
|
val = 2; /* 16-bits */
|
||||||
raw_dump_inline(NULL, "Compressed ipv6 addr is (16 bits)",
|
raw_dump_inline(NULL, "Compressed ipv6 addr is (16 bits)",
|
||||||
*hc06_ptr - 2, 2);
|
*hc_ptr - 2, 2);
|
||||||
} else {
|
} else {
|
||||||
/* do not compress IID => xxxx::IID */
|
/* do not compress IID => xxxx::IID */
|
||||||
memcpy(*hc06_ptr, &ipaddr->s6_addr16[4], 8);
|
memcpy(*hc_ptr, &ipaddr->s6_addr16[4], 8);
|
||||||
*hc06_ptr += 8;
|
*hc_ptr += 8;
|
||||||
val = 1; /* 64-bits */
|
val = 1; /* 64-bits */
|
||||||
raw_dump_inline(NULL, "Compressed ipv6 addr is (64 bits)",
|
raw_dump_inline(NULL, "Compressed ipv6 addr is (64 bits)",
|
||||||
*hc06_ptr - 8, 8);
|
*hc_ptr - 8, 8);
|
||||||
}
|
}
|
||||||
|
|
||||||
return rol8(val, shift);
|
return rol8(val, shift);
|
||||||
}
|
}
|
||||||
|
|
||||||
static void compress_udp_header(u8 **hc06_ptr, struct sk_buff *skb)
|
static void compress_udp_header(u8 **hc_ptr, struct sk_buff *skb)
|
||||||
{
|
{
|
||||||
struct udphdr *uh = udp_hdr(skb);
|
struct udphdr *uh = udp_hdr(skb);
|
||||||
u8 tmp;
|
u8 tmp;
|
||||||
|
@ -555,46 +555,46 @@ static void compress_udp_header(u8 **hc06_ptr, struct sk_buff *skb)
|
||||||
pr_debug("UDP header: both ports compression to 4 bits\n");
|
pr_debug("UDP header: both ports compression to 4 bits\n");
|
||||||
/* compression value */
|
/* compression value */
|
||||||
tmp = LOWPAN_NHC_UDP_CS_P_11;
|
tmp = LOWPAN_NHC_UDP_CS_P_11;
|
||||||
lowpan_push_hc_data(hc06_ptr, &tmp, sizeof(tmp));
|
lowpan_push_hc_data(hc_ptr, &tmp, sizeof(tmp));
|
||||||
/* source and destination port */
|
/* source and destination port */
|
||||||
tmp = ntohs(uh->dest) - LOWPAN_NHC_UDP_4BIT_PORT +
|
tmp = ntohs(uh->dest) - LOWPAN_NHC_UDP_4BIT_PORT +
|
||||||
((ntohs(uh->source) - LOWPAN_NHC_UDP_4BIT_PORT) << 4);
|
((ntohs(uh->source) - LOWPAN_NHC_UDP_4BIT_PORT) << 4);
|
||||||
lowpan_push_hc_data(hc06_ptr, &tmp, sizeof(tmp));
|
lowpan_push_hc_data(hc_ptr, &tmp, sizeof(tmp));
|
||||||
} else if ((ntohs(uh->dest) & LOWPAN_NHC_UDP_8BIT_MASK) ==
|
} else if ((ntohs(uh->dest) & LOWPAN_NHC_UDP_8BIT_MASK) ==
|
||||||
LOWPAN_NHC_UDP_8BIT_PORT) {
|
LOWPAN_NHC_UDP_8BIT_PORT) {
|
||||||
pr_debug("UDP header: remove 8 bits of dest\n");
|
pr_debug("UDP header: remove 8 bits of dest\n");
|
||||||
/* compression value */
|
/* compression value */
|
||||||
tmp = LOWPAN_NHC_UDP_CS_P_01;
|
tmp = LOWPAN_NHC_UDP_CS_P_01;
|
||||||
lowpan_push_hc_data(hc06_ptr, &tmp, sizeof(tmp));
|
lowpan_push_hc_data(hc_ptr, &tmp, sizeof(tmp));
|
||||||
/* source port */
|
/* source port */
|
||||||
lowpan_push_hc_data(hc06_ptr, &uh->source, sizeof(uh->source));
|
lowpan_push_hc_data(hc_ptr, &uh->source, sizeof(uh->source));
|
||||||
/* destination port */
|
/* destination port */
|
||||||
tmp = ntohs(uh->dest) - LOWPAN_NHC_UDP_8BIT_PORT;
|
tmp = ntohs(uh->dest) - LOWPAN_NHC_UDP_8BIT_PORT;
|
||||||
lowpan_push_hc_data(hc06_ptr, &tmp, sizeof(tmp));
|
lowpan_push_hc_data(hc_ptr, &tmp, sizeof(tmp));
|
||||||
} else if ((ntohs(uh->source) & LOWPAN_NHC_UDP_8BIT_MASK) ==
|
} else if ((ntohs(uh->source) & LOWPAN_NHC_UDP_8BIT_MASK) ==
|
||||||
LOWPAN_NHC_UDP_8BIT_PORT) {
|
LOWPAN_NHC_UDP_8BIT_PORT) {
|
||||||
pr_debug("UDP header: remove 8 bits of source\n");
|
pr_debug("UDP header: remove 8 bits of source\n");
|
||||||
/* compression value */
|
/* compression value */
|
||||||
tmp = LOWPAN_NHC_UDP_CS_P_10;
|
tmp = LOWPAN_NHC_UDP_CS_P_10;
|
||||||
lowpan_push_hc_data(hc06_ptr, &tmp, sizeof(tmp));
|
lowpan_push_hc_data(hc_ptr, &tmp, sizeof(tmp));
|
||||||
/* source port */
|
/* source port */
|
||||||
tmp = ntohs(uh->source) - LOWPAN_NHC_UDP_8BIT_PORT;
|
tmp = ntohs(uh->source) - LOWPAN_NHC_UDP_8BIT_PORT;
|
||||||
lowpan_push_hc_data(hc06_ptr, &tmp, sizeof(tmp));
|
lowpan_push_hc_data(hc_ptr, &tmp, sizeof(tmp));
|
||||||
/* destination port */
|
/* destination port */
|
||||||
lowpan_push_hc_data(hc06_ptr, &uh->dest, sizeof(uh->dest));
|
lowpan_push_hc_data(hc_ptr, &uh->dest, sizeof(uh->dest));
|
||||||
} else {
|
} else {
|
||||||
pr_debug("UDP header: can't compress\n");
|
pr_debug("UDP header: can't compress\n");
|
||||||
/* compression value */
|
/* compression value */
|
||||||
tmp = LOWPAN_NHC_UDP_CS_P_00;
|
tmp = LOWPAN_NHC_UDP_CS_P_00;
|
||||||
lowpan_push_hc_data(hc06_ptr, &tmp, sizeof(tmp));
|
lowpan_push_hc_data(hc_ptr, &tmp, sizeof(tmp));
|
||||||
/* source port */
|
/* source port */
|
||||||
lowpan_push_hc_data(hc06_ptr, &uh->source, sizeof(uh->source));
|
lowpan_push_hc_data(hc_ptr, &uh->source, sizeof(uh->source));
|
||||||
/* destination port */
|
/* destination port */
|
||||||
lowpan_push_hc_data(hc06_ptr, &uh->dest, sizeof(uh->dest));
|
lowpan_push_hc_data(hc_ptr, &uh->dest, sizeof(uh->dest));
|
||||||
}
|
}
|
||||||
|
|
||||||
/* checksum is always inline */
|
/* checksum is always inline */
|
||||||
lowpan_push_hc_data(hc06_ptr, &uh->check, sizeof(uh->check));
|
lowpan_push_hc_data(hc_ptr, &uh->check, sizeof(uh->check));
|
||||||
|
|
||||||
/* skip the UDP header */
|
/* skip the UDP header */
|
||||||
skb_pull(skb, sizeof(struct udphdr));
|
skb_pull(skb, sizeof(struct udphdr));
|
||||||
|
@ -604,7 +604,7 @@ int lowpan_header_compress(struct sk_buff *skb, struct net_device *dev,
|
||||||
unsigned short type, const void *_daddr,
|
unsigned short type, const void *_daddr,
|
||||||
const void *_saddr, unsigned int len)
|
const void *_saddr, unsigned int len)
|
||||||
{
|
{
|
||||||
u8 tmp, iphc0, iphc1, *hc06_ptr;
|
u8 tmp, iphc0, iphc1, *hc_ptr;
|
||||||
struct ipv6hdr *hdr;
|
struct ipv6hdr *hdr;
|
||||||
u8 head[100] = {};
|
u8 head[100] = {};
|
||||||
|
|
||||||
|
@ -612,7 +612,7 @@ int lowpan_header_compress(struct sk_buff *skb, struct net_device *dev,
|
||||||
return -EINVAL;
|
return -EINVAL;
|
||||||
|
|
||||||
hdr = ipv6_hdr(skb);
|
hdr = ipv6_hdr(skb);
|
||||||
hc06_ptr = head + 2;
|
hc_ptr = head + 2;
|
||||||
|
|
||||||
pr_debug("IPv6 header dump:\n\tversion = %d\n\tlength = %d\n"
|
pr_debug("IPv6 header dump:\n\tversion = %d\n\tlength = %d\n"
|
||||||
"\tnexthdr = 0x%02x\n\thop_lim = %d\n\tdest = %pI6c\n",
|
"\tnexthdr = 0x%02x\n\thop_lim = %d\n\tdest = %pI6c\n",
|
||||||
|
@ -649,7 +649,7 @@ int lowpan_header_compress(struct sk_buff *skb, struct net_device *dev,
|
||||||
* class depends on the presence of version and flow label
|
* class depends on the presence of version and flow label
|
||||||
*/
|
*/
|
||||||
|
|
||||||
/* hc06 format of TC is ECN | DSCP , original one is DSCP | ECN */
|
/* hc format of TC is ECN | DSCP , original one is DSCP | ECN */
|
||||||
tmp = (hdr->priority << 4) | (hdr->flow_lbl[0] >> 4);
|
tmp = (hdr->priority << 4) | (hdr->flow_lbl[0] >> 4);
|
||||||
tmp = ((tmp & 0x03) << 6) | (tmp >> 2);
|
tmp = ((tmp & 0x03) << 6) | (tmp >> 2);
|
||||||
|
|
||||||
|
@ -663,8 +663,8 @@ int lowpan_header_compress(struct sk_buff *skb, struct net_device *dev,
|
||||||
iphc0 |= LOWPAN_IPHC_TC_C;
|
iphc0 |= LOWPAN_IPHC_TC_C;
|
||||||
} else {
|
} else {
|
||||||
/* compress only the flow label */
|
/* compress only the flow label */
|
||||||
*hc06_ptr = tmp;
|
*hc_ptr = tmp;
|
||||||
hc06_ptr += 1;
|
hc_ptr += 1;
|
||||||
}
|
}
|
||||||
} else {
|
} else {
|
||||||
/* Flow label cannot be compressed */
|
/* Flow label cannot be compressed */
|
||||||
|
@ -672,15 +672,15 @@ int lowpan_header_compress(struct sk_buff *skb, struct net_device *dev,
|
||||||
((hdr->flow_lbl[0] & 0xF0) == 0)) {
|
((hdr->flow_lbl[0] & 0xF0) == 0)) {
|
||||||
/* compress only traffic class */
|
/* compress only traffic class */
|
||||||
iphc0 |= LOWPAN_IPHC_TC_C;
|
iphc0 |= LOWPAN_IPHC_TC_C;
|
||||||
*hc06_ptr = (tmp & 0xc0) | (hdr->flow_lbl[0] & 0x0F);
|
*hc_ptr = (tmp & 0xc0) | (hdr->flow_lbl[0] & 0x0F);
|
||||||
memcpy(hc06_ptr + 1, &hdr->flow_lbl[1], 2);
|
memcpy(hc_ptr + 1, &hdr->flow_lbl[1], 2);
|
||||||
hc06_ptr += 3;
|
hc_ptr += 3;
|
||||||
} else {
|
} else {
|
||||||
/* compress nothing */
|
/* compress nothing */
|
||||||
memcpy(hc06_ptr, hdr, 4);
|
memcpy(hc_ptr, hdr, 4);
|
||||||
/* replace the top byte with new ECN | DSCP format */
|
/* replace the top byte with new ECN | DSCP format */
|
||||||
*hc06_ptr = tmp;
|
*hc_ptr = tmp;
|
||||||
hc06_ptr += 4;
|
hc_ptr += 4;
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -691,8 +691,8 @@ int lowpan_header_compress(struct sk_buff *skb, struct net_device *dev,
|
||||||
iphc0 |= LOWPAN_IPHC_NH_C;
|
iphc0 |= LOWPAN_IPHC_NH_C;
|
||||||
|
|
||||||
if ((iphc0 & LOWPAN_IPHC_NH_C) == 0) {
|
if ((iphc0 & LOWPAN_IPHC_NH_C) == 0) {
|
||||||
*hc06_ptr = hdr->nexthdr;
|
*hc_ptr = hdr->nexthdr;
|
||||||
hc06_ptr += 1;
|
hc_ptr += 1;
|
||||||
}
|
}
|
||||||
|
|
||||||
/*
|
/*
|
||||||
|
@ -713,8 +713,8 @@ int lowpan_header_compress(struct sk_buff *skb, struct net_device *dev,
|
||||||
iphc0 |= LOWPAN_IPHC_TTL_255;
|
iphc0 |= LOWPAN_IPHC_TTL_255;
|
||||||
break;
|
break;
|
||||||
default:
|
default:
|
||||||
*hc06_ptr = hdr->hop_limit;
|
*hc_ptr = hdr->hop_limit;
|
||||||
hc06_ptr += 1;
|
hc_ptr += 1;
|
||||||
break;
|
break;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -724,14 +724,14 @@ int lowpan_header_compress(struct sk_buff *skb, struct net_device *dev,
|
||||||
iphc1 |= LOWPAN_IPHC_SAC;
|
iphc1 |= LOWPAN_IPHC_SAC;
|
||||||
/* TODO: context lookup */
|
/* TODO: context lookup */
|
||||||
} else if (is_addr_link_local(&hdr->saddr)) {
|
} else if (is_addr_link_local(&hdr->saddr)) {
|
||||||
iphc1 |= lowpan_compress_addr_64(&hc06_ptr,
|
iphc1 |= lowpan_compress_addr_64(&hc_ptr,
|
||||||
LOWPAN_IPHC_SAM_BIT, &hdr->saddr, _saddr);
|
LOWPAN_IPHC_SAM_BIT, &hdr->saddr, _saddr);
|
||||||
pr_debug("source address unicast link-local %pI6c "
|
pr_debug("source address unicast link-local %pI6c "
|
||||||
"iphc1 0x%02x\n", &hdr->saddr, iphc1);
|
"iphc1 0x%02x\n", &hdr->saddr, iphc1);
|
||||||
} else {
|
} else {
|
||||||
pr_debug("send the full source address\n");
|
pr_debug("send the full source address\n");
|
||||||
memcpy(hc06_ptr, &hdr->saddr.s6_addr16[0], 16);
|
memcpy(hc_ptr, &hdr->saddr.s6_addr16[0], 16);
|
||||||
hc06_ptr += 16;
|
hc_ptr += 16;
|
||||||
}
|
}
|
||||||
|
|
||||||
/* destination address compression */
|
/* destination address compression */
|
||||||
|
@ -742,55 +742,55 @@ int lowpan_header_compress(struct sk_buff *skb, struct net_device *dev,
|
||||||
pr_debug("compressed to 1 octet\n");
|
pr_debug("compressed to 1 octet\n");
|
||||||
iphc1 |= LOWPAN_IPHC_DAM_11;
|
iphc1 |= LOWPAN_IPHC_DAM_11;
|
||||||
/* use last byte */
|
/* use last byte */
|
||||||
*hc06_ptr = hdr->daddr.s6_addr[15];
|
*hc_ptr = hdr->daddr.s6_addr[15];
|
||||||
hc06_ptr += 1;
|
hc_ptr += 1;
|
||||||
} else if (lowpan_is_mcast_addr_compressable32(&hdr->daddr)) {
|
} else if (lowpan_is_mcast_addr_compressable32(&hdr->daddr)) {
|
||||||
pr_debug("compressed to 4 octets\n");
|
pr_debug("compressed to 4 octets\n");
|
||||||
iphc1 |= LOWPAN_IPHC_DAM_10;
|
iphc1 |= LOWPAN_IPHC_DAM_10;
|
||||||
/* second byte + the last three */
|
/* second byte + the last three */
|
||||||
*hc06_ptr = hdr->daddr.s6_addr[1];
|
*hc_ptr = hdr->daddr.s6_addr[1];
|
||||||
memcpy(hc06_ptr + 1, &hdr->daddr.s6_addr[13], 3);
|
memcpy(hc_ptr + 1, &hdr->daddr.s6_addr[13], 3);
|
||||||
hc06_ptr += 4;
|
hc_ptr += 4;
|
||||||
} else if (lowpan_is_mcast_addr_compressable48(&hdr->daddr)) {
|
} else if (lowpan_is_mcast_addr_compressable48(&hdr->daddr)) {
|
||||||
pr_debug("compressed to 6 octets\n");
|
pr_debug("compressed to 6 octets\n");
|
||||||
iphc1 |= LOWPAN_IPHC_DAM_01;
|
iphc1 |= LOWPAN_IPHC_DAM_01;
|
||||||
/* second byte + the last five */
|
/* second byte + the last five */
|
||||||
*hc06_ptr = hdr->daddr.s6_addr[1];
|
*hc_ptr = hdr->daddr.s6_addr[1];
|
||||||
memcpy(hc06_ptr + 1, &hdr->daddr.s6_addr[11], 5);
|
memcpy(hc_ptr + 1, &hdr->daddr.s6_addr[11], 5);
|
||||||
hc06_ptr += 6;
|
hc_ptr += 6;
|
||||||
} else {
|
} else {
|
||||||
pr_debug("using full address\n");
|
pr_debug("using full address\n");
|
||||||
iphc1 |= LOWPAN_IPHC_DAM_00;
|
iphc1 |= LOWPAN_IPHC_DAM_00;
|
||||||
memcpy(hc06_ptr, &hdr->daddr.s6_addr[0], 16);
|
memcpy(hc_ptr, &hdr->daddr.s6_addr[0], 16);
|
||||||
hc06_ptr += 16;
|
hc_ptr += 16;
|
||||||
}
|
}
|
||||||
} else {
|
} else {
|
||||||
/* TODO: context lookup */
|
/* TODO: context lookup */
|
||||||
if (is_addr_link_local(&hdr->daddr)) {
|
if (is_addr_link_local(&hdr->daddr)) {
|
||||||
iphc1 |= lowpan_compress_addr_64(&hc06_ptr,
|
iphc1 |= lowpan_compress_addr_64(&hc_ptr,
|
||||||
LOWPAN_IPHC_DAM_BIT, &hdr->daddr, _daddr);
|
LOWPAN_IPHC_DAM_BIT, &hdr->daddr, _daddr);
|
||||||
pr_debug("dest address unicast link-local %pI6c "
|
pr_debug("dest address unicast link-local %pI6c "
|
||||||
"iphc1 0x%02x\n", &hdr->daddr, iphc1);
|
"iphc1 0x%02x\n", &hdr->daddr, iphc1);
|
||||||
} else {
|
} else {
|
||||||
pr_debug("dest address unicast %pI6c\n", &hdr->daddr);
|
pr_debug("dest address unicast %pI6c\n", &hdr->daddr);
|
||||||
memcpy(hc06_ptr, &hdr->daddr.s6_addr16[0], 16);
|
memcpy(hc_ptr, &hdr->daddr.s6_addr16[0], 16);
|
||||||
hc06_ptr += 16;
|
hc_ptr += 16;
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
/* UDP header compression */
|
/* UDP header compression */
|
||||||
if (hdr->nexthdr == UIP_PROTO_UDP)
|
if (hdr->nexthdr == UIP_PROTO_UDP)
|
||||||
compress_udp_header(&hc06_ptr, skb);
|
compress_udp_header(&hc_ptr, skb);
|
||||||
|
|
||||||
head[0] = iphc0;
|
head[0] = iphc0;
|
||||||
head[1] = iphc1;
|
head[1] = iphc1;
|
||||||
|
|
||||||
skb_pull(skb, sizeof(struct ipv6hdr));
|
skb_pull(skb, sizeof(struct ipv6hdr));
|
||||||
skb_reset_transport_header(skb);
|
skb_reset_transport_header(skb);
|
||||||
memcpy(skb_push(skb, hc06_ptr - head), head, hc06_ptr - head);
|
memcpy(skb_push(skb, hc_ptr - head), head, hc_ptr - head);
|
||||||
skb_reset_network_header(skb);
|
skb_reset_network_header(skb);
|
||||||
|
|
||||||
pr_debug("header len %d skb %u\n", (int)(hc06_ptr - head), skb->len);
|
pr_debug("header len %d skb %u\n", (int)(hc_ptr - head), skb->len);
|
||||||
|
|
||||||
raw_dump_table(__func__, "raw skb data dump compressed",
|
raw_dump_table(__func__, "raw skb data dump compressed",
|
||||||
skb->data, skb->len);
|
skb->data, skb->len);
|
||||||
|
|
Loading…
Reference in New Issue
Block a user