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fixed alignment problem on MSP430 when using compression

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This commit is contained in:
nifi 2009-04-06 13:11:20 +00:00
parent 1c6264fddc
commit 4bc60d76d3
2 changed files with 163 additions and 71 deletions
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181
core/net/sicslowpan.c
View file

@ -32,7 +32,7 @@
*
* This file is part of the Contiki operating system.
*
* $Id: sicslowpan.c,v 1.5 2009/03/12 21:58:20 adamdunkels Exp $
* $Id: sicslowpan.c,v 1.6 2009/04/06 13:11:20 nifi Exp $
*/
/**
* \file
@ -47,6 +47,7 @@
#include <string.h>
#include "contiki.h"
#include "net/tcpip.h"
#include "net/uip.h"
#include "net/uip-netif.h"
@ -80,14 +81,42 @@ void uip_log(char *msg);
#define UIP_LOG(m)
#endif /* UIP_LOGGING == 1 */
#define GET16(ptr,index) (((uint16_t)((ptr)[index] << 8)) | ((ptr)[(index) + 1]))
#define SET16(ptr,index,value) do { \
(ptr)[index] = ((value) >> 8) & 0xff; \
(ptr)[index + 1] = (value) & 0xff; \
} while(0)
/** \name Pointers in the rime buffer
* @{
*/
#define RIME_FRAG_BUF ((struct sicslowpan_frag_hdr *)rime_ptr)
#define RIME_HC1_BUF ((struct sicslowpan_hc1_hdr *)(rime_ptr + rime_hdr_len))
#define RIME_HC1_HC_UDP_BUF ((struct sicslowpan_hc1_hc_udp_hdr *)(rime_ptr + rime_hdr_len))
#define RIME_IP_BUF ((struct uip_ip_hdr *)(rime_ptr + rime_hdr_len))
/* #define RIME_FRAG_BUF ((struct sicslowpan_frag_hdr *)rime_ptr) */
#define RIME_FRAG_PTR (rime_ptr)
#define RIME_FRAG_DISPATCH_SIZE 0 /* 16 bit */
#define RIME_FRAG_TAG 2 /* 16 bit */
#define RIME_FRAG_OFFSET 4 /* 8 bit */
/* #define RIME_HC1_BUF ((struct sicslowpan_hc1_hdr *)(rime_ptr + rime_hdr_len)) */
#define RIME_HC1_PTR (rime_ptr + rime_hdr_len)
#define RIME_HC1_DISPATCH 0 /* 8 bit */
#define RIME_HC1_ENCODING 1 /* 8 bit */
#define RIME_HC1_TTL 2 /* 8 bit */
/* #define RIME_HC1_HC_UDP_BUF ((struct sicslowpan_hc1_hc_udp_hdr *)(rime_ptr + rime_hdr_len)) */
#define RIME_HC1_HC_UDP_PTR (rime_ptr + rime_hdr_len)
#define RIME_HC1_HC_UDP_DISPATCH 0 /* 8 bit */
#define RIME_HC1_HC_UDP_HC1_ENCODING 1 /* 8 bit */
#define RIME_HC1_HC_UDP_UDP_ENCODING 2 /* 8 bit */
#define RIME_HC1_HC_UDP_TTL 3 /* 8 bit */
#define RIME_HC1_HC_UDP_PORTS 4 /* 8 bit */
#define RIME_HC1_HC_UDP_CHECKSUM 5 /* 16 bit */
#define RIME_IPHC_BUF ((struct sicslowpan_iphc_hdr *)(rime_ptr + rime_hdr_len))
/* #define RIME_IPHC_DISPATCH 0 /\* 8 bit *\/ */
/* #define RIME_IPHC_ENCODING1 1 /\* 8 bit *\/ */
/* #define RIME_IPHC_ENCODING2 2 /\* 8 bit *\/ */
/* #define RIME_IP_BUF ((struct uip_ip_hdr *)(rime_ptr + rime_hdr_len)) */
/** @} */
/** \name Pointers in the sicslowpan and uip buffer
@ -265,9 +294,9 @@ addr_context_lookup_by_number(u8_t number) {
* Address compression logic (multicast only applies to dest):
* If multicast:
* If flags (see RFC4291 section 2.7) are all 0 AND
* the 112-bit group id is mapable to a 9-bit group
* the 112-bit group id is mappable to a 9-bit group
* (for now all nodes and all routers groups are
* mapable),
* mappable),
* we compress to 16 bits
* Else unicast:
* If we have a context for the prefix,
@ -291,6 +320,8 @@ compress_hdr_hc01(rimeaddr_t *rime_destaddr)
* this does not work. We therefore reset the IPHC encoding here
*/
memset(RIME_IPHC_BUF->encoding, 0, 2);
/* RIME_IPHC_BUF->encoding[0] = 0; */
/* RIME_IPHC_BUF->encoding[1] = 0; */
RIME_IPHC_BUF->dispatch = SICSLOWPAN_DISPATCH_IPHC;
/*
@ -844,20 +875,25 @@ compress_hdr_hc1(rimeaddr_t *rime_destaddr)
* All fields in the IP header but Hop Limit are elided
* If next header is UDP, we compress UDP header using HC2
*/
RIME_HC1_BUF->dispatch = SICSLOWPAN_DISPATCH_HC1;
/* RIME_HC1_BUF->dispatch = SICSLOWPAN_DISPATCH_HC1; */
RIME_HC1_PTR[RIME_HC1_DISPATCH] = SICSLOWPAN_DISPATCH_HC1;
uncomp_hdr_len += UIP_IPH_LEN;
switch(UIP_IP_BUF->proto) {
case UIP_PROTO_ICMP6:
/* HC1 encoding and ttl */
RIME_HC1_BUF->encoding = 0xFC;
RIME_HC1_BUF->ttl = UIP_IP_BUF->ttl;
/* RIME_HC1_BUF->encoding = 0xFC; */
RIME_HC1_PTR[RIME_HC1_ENCODING] = 0xFC;
/* RIME_HC1_BUF->ttl = UIP_IP_BUF->ttl; */
RIME_HC1_PTR[RIME_HC1_TTL] = UIP_IP_BUF->ttl;
rime_hdr_len += SICSLOWPAN_HC1_HDR_LEN;
break;
#if UIP_CONF_TCP
case UIP_PROTO_TCP:
/* HC1 encoding and ttl */
RIME_HC1_BUF->encoding = 0xFE;
RIME_HC1_BUF->ttl = UIP_IP_BUF->ttl;
/* RIME_HC1_BUF->encoding = 0xFE; */
RIME_HC1_PTR[RIME_HC1_ENCODING] = 0xFE;
/* RIME_HC1_BUF->ttl = UIP_IP_BUF->ttl; */
RIME_HC1_PTR[RIME_HC1_TTL] = UIP_IP_BUF->ttl;
rime_hdr_len += SICSLOWPAN_HC1_HDR_LEN;
break;
#endif /* UIP_CONF_TCP */
@ -874,21 +910,31 @@ compress_hdr_hc1(rimeaddr_t *rime_destaddr)
HTONS(UIP_UDP_BUF->destport) >= SICSLOWPAN_UDP_PORT_MIN &&
HTONS(UIP_UDP_BUF->destport) < SICSLOWPAN_UDP_PORT_MAX) {
/* HC1 encoding */
RIME_HC1_HC_UDP_BUF->hc1_encoding = 0xFB;
/* RIME_HC1_HC_UDP_BUF->hc1_encoding = 0xFB; */
RIME_HC1_HC_UDP_PTR[RIME_HC1_HC_UDP_HC1_ENCODING] = 0xFB;
/* HC_UDP encoding, ttl, src and dest ports, checksum */
RIME_HC1_HC_UDP_BUF->hc_udp_encoding = 0xE0;
RIME_HC1_HC_UDP_BUF->ttl = UIP_IP_BUF->ttl;
RIME_HC1_HC_UDP_BUF->ports = (u8_t)((HTONS(UIP_UDP_BUF->srcport) -
/* RIME_HC1_HC_UDP_BUF->hc_udp_encoding = 0xE0; */
RIME_HC1_HC_UDP_PTR[RIME_HC1_HC_UDP_UDP_ENCODING] = 0xE0;
/* RIME_HC1_HC_UDP_BUF->ttl = UIP_IP_BUF->ttl; */
RIME_HC1_HC_UDP_PTR[RIME_HC1_HC_UDP_TTL] = UIP_IP_BUF->ttl;
/* RIME_HC1_HC_UDP_BUF->ports = (u8_t)((HTONS(UIP_UDP_BUF->srcport) - */
/* SICSLOWPAN_UDP_PORT_MIN) << 4) + */
/* (u8_t)((HTONS(UIP_UDP_BUF->destport) - SICSLOWPAN_UDP_PORT_MIN)); */
RIME_HC1_HC_UDP_PTR[RIME_HC1_HC_UDP_PORTS] =
(u8_t)((HTONS(UIP_UDP_BUF->srcport) -
SICSLOWPAN_UDP_PORT_MIN) << 4) +
(u8_t)((HTONS(UIP_UDP_BUF->destport) - SICSLOWPAN_UDP_PORT_MIN));
RIME_HC1_HC_UDP_BUF->udpchksum = UIP_UDP_BUF->udpchksum;
/* RIME_HC1_HC_UDP_BUF->udpchksum = UIP_UDP_BUF->udpchksum; */
memcpy(&RIME_HC1_HC_UDP_PTR[RIME_HC1_HC_UDP_CHKSUM], &UIP_UDP_BUF->udpchksum, 2);
rime_hdr_len += SICSLOWPAN_HC1_HC_UDP_HDR_LEN;
uncomp_hdr_len += UIP_UDPH_LEN;
} else {
/* HC1 encoding and ttl */
RIME_HC1_BUF->encoding = 0xFA;
RIME_HC1_BUF->ttl = UIP_IP_BUF->ttl;
/* RIME_HC1_BUF->encoding = 0xFA; */
RIME_HC1_PTR[RIME_HC1_ENCODING] = 0xFA;
/* RIME_HC1_BUF->ttl = UIP_IP_BUF->ttl; */
RIME_HC1_PTR[RIME_HC1_TTL] = UIP_IP_BUF->ttl;
rime_hdr_len += SICSLOWPAN_HC1_HDR_LEN;
}
break;
@ -932,37 +978,50 @@ uncompress_hdr_hc1(u16_t ip_len) {
uncomp_hdr_len += UIP_IPH_LEN;
/* Next header field */
switch(RIME_HC1_BUF->encoding & 0x06) {
/* switch(RIME_HC1_BUF->encoding & 0x06) { */
switch(RIME_HC1_PTR[RIME_HC1_ENCODING] & 0x06) {
case SICSLOWPAN_HC1_NH_ICMP6:
SICSLOWPAN_IP_BUF->proto = UIP_PROTO_ICMP6;
SICSLOWPAN_IP_BUF->ttl = RIME_HC1_BUF->ttl;
/* SICSLOWPAN_IP_BUF->ttl = RIME_HC1_BUF->ttl; */
SICSLOWPAN_IP_BUF->ttl = RIME_HC1_PTR[RIME_HC1_TTL];
rime_hdr_len += SICSLOWPAN_HC1_HDR_LEN;
break;
#if UIP_CONF_TCP
case SICSLOWPAN_HC1_NH_TCP:
SICSLOWPAN_IP_BUF->proto = UIP_PROTO_TCP;
SICSLOWPAN_IP_BUF->ttl = RIME_HC1_BUF->ttl;
/* SICSLOWPAN_IP_BUF->ttl = RIME_HC1_BUF->ttl; */
SICSLOWPAN_IP_BUF->ttl = RIME_HC1_PTR[RIME_HC1_TTL];
rime_hdr_len += SICSLOWPAN_HC1_HDR_LEN;
break;
#endif/* UIP_CONF_TCP */
#if UIP_CONF_UDP
case SICSLOWPAN_HC1_NH_UDP:
SICSLOWPAN_IP_BUF->proto = UIP_PROTO_UDP;
if(RIME_HC1_HC_UDP_BUF->hc1_encoding & 0x01) {
/* if(RIME_HC1_HC_UDP_BUF->hc1_encoding & 0x01) { */
if(RIME_HC1_HC_UDP_PTR[RIME_HC1_HC_UDP_HC1_ENCODING] & 0x01) {
/* UDP header is compressed with HC_UDP */
if(RIME_HC1_HC_UDP_BUF->hc_udp_encoding !=
/* if(RIME_HC1_HC_UDP_BUF->hc_udp_encoding != */
if(RIME_HC1_HC_UDP_PTR[RIME_HC1_HC_UDP_UDP_ENCODING] !=
SICSLOWPAN_HC_UDP_ALL_C) {
PRINTF("sicslowpan (uncompress_hdr), packet not supported");
return;
}
/* IP TTL */
SICSLOWPAN_IP_BUF->ttl = RIME_HC1_HC_UDP_BUF->ttl;
/* SICSLOWPAN_IP_BUF->ttl = RIME_HC1_HC_UDP_BUF->ttl; */
SICSLOWPAN_IP_BUF->ttl = RIME_HC1_HC_UDP_PTR[RIME_HC1_HC_UDP_TTL];
/* UDP ports, len, checksum */
SICSLOWPAN_UDP_BUF->srcport = HTONS(SICSLOWPAN_UDP_PORT_MIN +
(RIME_HC1_HC_UDP_BUF->ports >> 4));
SICSLOWPAN_UDP_BUF->destport = HTONS(SICSLOWPAN_UDP_PORT_MIN +
(RIME_HC1_HC_UDP_BUF->ports & 0x0F));
SICSLOWPAN_UDP_BUF->udpchksum = RIME_HC1_HC_UDP_BUF->udpchksum;
/* SICSLOWPAN_UDP_BUF->srcport = HTONS(SICSLOWPAN_UDP_PORT_MIN + */
/* (RIME_HC1_HC_UDP_BUF->ports >> 4)); */
SICSLOWPAN_UDP_BUF->srcport =
HTONS(SICSLOWPAN_UDP_PORT_MIN +
(RIME_HC1_HC_UDP_PTR[RIME_HC1_HC_UDP_PORTS] >> 4));
/* SICSLOWPAN_UDP_BUF->destport = HTONS(SICSLOWPAN_UDP_PORT_MIN + */
/* (RIME_HC1_HC_UDP_BUF->ports & 0x0F)); */
SICSLOWPAN_UDP_BUF->destport =
HTONS(SICSLOWPAN_UDP_PORT_MIN +
(RIME_HC1_HC_UDP_PTR[RIME_HC1_HC_UDP_PORTS] & 0x0F));
/* SICSLOWPAN_UDP_BUF->udpchksum = RIME_HC1_HC_UDP_BUF->udpchksum; */
memcpy(&SICSLOWPAN_UDP_BUF->udpchksum, &RIME_HC1_HC_UDP_PTR[RIME_HC1_HC_UDP_CHKSUM], 2);
uncomp_hdr_len += UIP_UDPH_LEN;
rime_hdr_len += SICSLOWPAN_HC1_HC_UDP_HDR_LEN;
} else {
@ -1041,7 +1100,7 @@ send_packet(rimeaddr_t *dest)
/* Set the link layer destination address for the packet as a
* packetbuf attribute. The MAC layer can access the destination
* address with the function "packetbuf_addr(PACKETBUF_ADDR_RECEIVER);
* address with the function packetbuf_addr(PACKETBUF_ADDR_RECEIVER).
*/
packetbuf_set_addr(PACKETBUF_ADDR_RECEIVER, dest);
@ -1121,9 +1180,12 @@ output(uip_lladdr_t *localdest)
* FRAG1 dispatch + header
* Note that the length is in units of 8 bytes
*/
RIME_FRAG_BUF->dispatch_size =
htons((SICSLOWPAN_DISPATCH_FRAG1 << 8) | uip_len);
RIME_FRAG_BUF->tag = htons(my_tag);
/* RIME_FRAG_BUF->dispatch_size = */
/* htons((SICSLOWPAN_DISPATCH_FRAG1 << 8) | uip_len); */
SET16(RIME_FRAG_PTR, RIME_FRAG_DISPATCH_SIZE,
((SICSLOWPAN_DISPATCH_FRAG1 << 8) | uip_len));
/* RIME_FRAG_BUF->tag = htons(my_tag); */
SET16(RIME_FRAG_PTR, RIME_FRAG_TAG, my_tag);
/* Copy payload and send */
rime_hdr_len += SICSLOWPAN_FRAG1_HDR_LEN;
@ -1143,12 +1205,15 @@ output(uip_lladdr_t *localdest)
* FRAGN dispatch and for each fragment, the offset
*/
rime_hdr_len = SICSLOWPAN_FRAGN_HDR_LEN;
RIME_FRAG_BUF->dispatch_size =
htons((SICSLOWPAN_DISPATCH_FRAGN << 8) | uip_len);
/* RIME_FRAG_BUF->dispatch_size = */
/* htons((SICSLOWPAN_DISPATCH_FRAGN << 8) | uip_len); */
SET16(RIME_FRAG_PTR, RIME_FRAG_DISPATCH_SIZE,
((SICSLOWPAN_DISPATCH_FRAGN << 8) | uip_len));
rime_payload_len = (MAC_MAX_PAYLOAD - rime_hdr_len) & 0xf8;
while(processed_ip_len < uip_len){
PRINTF("sicslowpan output: fragment ");
RIME_FRAG_BUF->offset = processed_ip_len >> 3;
/* RIME_FRAG_BUF->offset = processed_ip_len >> 3; */
RIME_FRAG_PTR[RIME_FRAG_OFFSET] = processed_ip_len >> 3;
/* Copy payload and send */
if(uip_len - processed_ip_len < rime_payload_len){
@ -1215,6 +1280,15 @@ input(const struct mac_driver *r)
}
#endif /* SICSLOWPAN_CONF_CONVENTIONAL_MAC */
#if UIP_CONF_ROUTER
if(!rimeaddr_cmp(packetbuf_addr(PACKETBUF_ADDR_RECEIVER),
&rimeaddr_node_addr) &&
!rimeaddr_cmp(packetbuf_addr(PACKETBUF_ADDR_RECEIVER), &rimeaddr_null)) {
PRINTF("sicslowpan: dropping packet not for us\n");
return;
}
#endif /* UIP_CONF_ROUTER */
/* init */
uncomp_hdr_len = 0;
rime_hdr_len = 0;
@ -1232,12 +1306,15 @@ input(const struct mac_driver *r)
* Since we don't support the mesh and broadcast header, the first header
* we look for is the fragmentation header
*/
switch((ntohs(RIME_FRAG_BUF->dispatch_size) & 0xf800) >> 8) {
/* switch((ntohs(RIME_FRAG_BUF->dispatch_size) & 0xf800) >> 8) { */
switch((GET16(RIME_FRAG_PTR, RIME_FRAG_DISPATCH_SIZE) & 0xf800) >> 8) {
case SICSLOWPAN_DISPATCH_FRAG1:
PRINTF("sicslowpan input: FRAG1 ");
frag_offset = 0;
frag_size = (ntohs(RIME_FRAG_BUF->dispatch_size) & 0x07ff);
frag_tag = ntohs(RIME_FRAG_BUF->tag);
/* frag_size = (ntohs(RIME_FRAG_BUF->dispatch_size) & 0x07ff); */
frag_size = GET16(RIME_FRAG_PTR, RIME_FRAG_DISPATCH_SIZE) & 0x07ff;
/* frag_tag = ntohs(RIME_FRAG_BUF->tag); */
frag_tag = GET16(RIME_FRAG_PTR, RIME_FRAG_TAG);
PRINTF("size %d, tag %d, offset %d)\n",
frag_size, frag_tag, frag_offset);
rime_hdr_len += SICSLOWPAN_FRAG1_HDR_LEN;
@ -1249,9 +1326,12 @@ input(const struct mac_driver *r)
* Offset is in units of 8 bytes
*/
PRINTF("sicslowpan input: FRAGN ");
frag_offset = RIME_FRAG_BUF->offset;
frag_tag = ntohs(RIME_FRAG_BUF->tag);
frag_size = (ntohs(RIME_FRAG_BUF->dispatch_size) & 0x07ff);
/* frag_offset = RIME_FRAG_BUF->offset; */
frag_offset = RIME_FRAG_PTR[RIME_FRAG_OFFSET];
/* frag_tag = ntohs(RIME_FRAG_BUF->tag); */
frag_tag = GET16(RIME_FRAG_PTR, RIME_FRAG_TAG);
/* frag_size = (ntohs(RIME_FRAG_BUF->dispatch_size) & 0x07ff); */
frag_size = GET16(RIME_FRAG_PTR, RIME_FRAG_DISPATCH_SIZE) & 0x07ff;
PRINTF("size %d, tag %d, offset %d)\n",
frag_size, frag_tag, frag_offset);
rime_hdr_len += SICSLOWPAN_FRAGN_HDR_LEN;
@ -1296,7 +1376,8 @@ input(const struct mac_driver *r)
#endif /* SICSLOWPAN_CONF_FRAG */
/* Process next dispatch and headers */
switch(RIME_HC1_BUF->dispatch) {
/* switch(RIME_HC1_BUF->dispatch) { */
switch(RIME_HC1_PTR[RIME_HC1_DISPATCH]) {
#if SICSLOWPAN_CONF_COMPRESSION == SICSLOWPAN_CONF_COMPRESSION_HC1
case SICSLOWPAN_DISPATCH_HC1:
PRINTF("sicslowpan input: HC1\n");
@ -1322,7 +1403,9 @@ input(const struct mac_driver *r)
break;
default:
/* unknown header */
PRINTF("sicslowpan input: unknown dispatch\n");
/* PRINTF("sicslowpan input: unknown dispatch\n"); */
PRINTF("sicslowpan input: unknown dispatch: %u\n",
RIME_HC1_PTR[RIME_HC1_DISPATCH]);
return;
}
@ -1393,6 +1476,11 @@ sicslowpan_init(const struct mac_driver *m)
tcpip_set_outputfunc(output);
#if SICSLOWPAN_CONF_COMPRESSION == SICSLOWPAN_CONF_COMPRESSION_HC01
#if SICSLOWPAN_CONF_MAX_ADDR_CONTEXTS < 1
#error sicslowpan compression HC01 requires at least one address context.
#error Change SICSLOWPAN_CONF_MAX_ADDR_CONTEXTS int contiki-conf.h.
#endif
/*
* Initialize the address contexts
* Context 00 is link local context
@ -1403,6 +1491,7 @@ sicslowpan_init(const struct mac_driver *m)
addr_contexts[0].prefix[0] = 0xfe;
addr_contexts[0].prefix[1] = 0x80;
#if SICSLOWPAN_CONF_MAX_ADDR_CONTEXTS > 1
addr_contexts[1].used = 1;
addr_contexts[1].number = 1;
addr_contexts[1].prefix[0] = 0xaa;
@ -1411,6 +1500,8 @@ sicslowpan_init(const struct mac_driver *m)
for(i = 2; i < SICSLOWPAN_CONF_MAX_ADDR_CONTEXTS; i++) {
addr_contexts[i].used = 0;
}
#endif /* SICSLOWPAN_CONF_MAX_ADDR_CONTEXTS > 1 */
#endif /*SICSLOWPAN_CONF_COMPRESSION == SICSLOWPAN_CONF_COMPRESSION_HC01*/
}
/*--------------------------------------------------------------------*/

49
core/net/sicslowpan.h
View file

@ -33,7 +33,7 @@
*
* This file is part of the Contiki operating system.
*
* $Id: sicslowpan.h,v 1.3 2009/03/17 20:28:44 nvt-se Exp $
* $Id: sicslowpan.h,v 1.4 2009/04/06 13:11:20 nifi Exp $
*/
/**
* \file
@ -49,6 +49,7 @@
#ifndef __SICSLOWPAN_H__
#define __SICSLOWPAN_H__
#include "net/uip.h"
#include "net/mac/mac.h"
/**
* \name General sicslowpan defines
@ -146,11 +147,11 @@
* and FRAGN headers, which are different. For FRAG1, the
* offset field is just not used
*/
struct sicslowpan_frag_hdr {
u16_t dispatch_size;
u16_t tag;
u8_t offset;
};
/* struct sicslowpan_frag_hdr { */
/* u16_t dispatch_size; */
/* u16_t tag; */
/* u8_t offset; */
/* }; */
/**
* \brief The HC1 header when HC_UDP is not used
@ -160,23 +161,23 @@ struct sicslowpan_frag_hdr {
* in another spot, and we use the sicslowpan_hc1_hc_udp
* structure
*/
struct sicslowpan_hc1_hdr {
u8_t dispatch;
u8_t encoding;
u8_t ttl;
};
/* struct sicslowpan_hc1_hdr { */
/* u8_t dispatch; */
/* u8_t encoding; */
/* u8_t ttl; */
/* }; */
/**
* \brief HC1 followed by HC_UDP
*/
struct sicslowpan_hc1_hc_udp_hdr {
u8_t dispatch;
u8_t hc1_encoding;
u8_t hc_udp_encoding;
u8_t ttl;
u8_t ports;
u16_t udpchksum;
};
/* struct sicslowpan_hc1_hc_udp_hdr { */
/* u8_t dispatch; */
/* u8_t hc1_encoding; */
/* u8_t hc_udp_encoding; */
/* u8_t ttl; */
/* u8_t ports; */
/* u16_t udpchksum; */
/* }; */
/**
* \brief IPHC dispatch and encoding
@ -187,11 +188,11 @@ struct sicslowpan_iphc_hdr {
u8_t encoding[2];
};
struct sicslowpan_nhc_udp_comp_hdr {
u8_t nhcid;
u8_t ports;
u16_t udpchksum;
};
/* struct sicslowpan_nhc_udp_comp_hdr { */
/* u8_t nhcid; */
/* u8_t ports; */
/* u16_t udpchksum; */
/* }; */
/**
* \brief An address context for IPHC address compression