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/* vim: set expandtab ts=4 sw=4: */
/*
* You may redistribute this program and/or modify it under the terms of
* the GNU General Public License as published by the Free Software Foundation,
* either version 3 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef Headers_H
#define Headers_H
#include "util/Assert.h"
#include "util/Endian.h"
#include <stdint.h>
struct Headers_IP6Header
{
uint16_t versionClassAndFlowLabel;
/** Big Endian. */
uint16_t flowLabelLow_be;
/** Big Endian. */
uint16_t payloadLength_be;
uint8_t nextHeader;
uint8_t hopLimit;
uint8_t sourceAddr[16];
uint8_t destinationAddr[16];
};
#define Headers_IP6Header_SIZE 40
Assert_compileTime(sizeof(struct Headers_IP6Header) == Headers_IP6Header_SIZE);
struct Headers_IP6Fragment
{
uint8_t nextHeader;
uint8_t zero;
uint16_t fragmentOffsetAndMoreFragments_be;
uint32_t identifier;
};
#define Headers_IP6Fragment_SIZE 8
Assert_compileTime(sizeof(struct Headers_IP6Fragment) == Headers_IP6Fragment_SIZE);
#define Headers_IP6Fragment_TYPE 44
static inline uint32_t Headers_IP6Fragment_getOffset(struct Headers_IP6Fragment* frag)
{
return Endian_bigEndianToHost16(frag->fragmentOffsetAndMoreFragments_be) >> 3;
}
static inline void Headers_IP6Fragment_setOffset(struct Headers_IP6Fragment* frag, uint16_t offset)
{
frag->fragmentOffsetAndMoreFragments_be &= Endian_hostToBigEndian16(7);
frag->fragmentOffsetAndMoreFragments_be |= Endian_hostToBigEndian16(offset << 3);
}
static inline int Headers_IP6Fragment_hasMoreFragments(struct Headers_IP6Fragment* frag)
{
return frag->fragmentOffsetAndMoreFragments_be & Endian_hostToBigEndian16(1);
}
static inline void Headers_IP6Fragment_setMoreFragments(struct Headers_IP6Fragment* frag, int more)
{
if (more) {
frag->fragmentOffsetAndMoreFragments_be |= Endian_hostToBigEndian16(1);
} else {
frag->fragmentOffsetAndMoreFragments_be &= Endian_hostToBigEndian16(0xFFFF << 1);
}
}
struct Headers_IP4Header
{
uint8_t versionAndHeaderLength;
uint8_t differentiatedServices;
uint16_t totalLength_be;
uint16_t identification_be;
uint16_t flagsAndFragmentOffset;
uint8_t ttl;
uint8_t protocol;
uint16_t checksum_be;
uint8_t sourceAddr[4];
uint8_t destAddr[4];
};
#define Headers_IP4Header_SIZE 20
Assert_compileTime(sizeof(struct Headers_IP4Header) == Headers_IP4Header_SIZE);
static inline int Headers_getIpVersion(void* header)
{
return (((uint8_t*) header)[0] & 0xF0) >> 4;
}
#define Headers_setIpVersion(header) \
(((uint8_t*) header)[0] |= ( \
(sizeof(*header) == Headers_IP4Header_SIZE) ? 4 : 6 \
) << 4)
struct Headers_UDPHeader {
uint16_t srcPort_be;
uint16_t destPort_be;
uint16_t length_be;
uint16_t checksum_be;
};
#define Headers_UDPHeader_SIZE 8
Assert_compileTime(sizeof(struct Headers_UDPHeader) == Headers_UDPHeader_SIZE);
struct Headers_ICMP6Header {
uint8_t type;
uint8_t code;
uint16_t checksum;
uint32_t additional;
};
#define Headers_ICMP6Header_SIZE 8
Assert_compileTime(sizeof(struct Headers_ICMP6Header) == Headers_ICMP6Header_SIZE);
/**
* A message which is broadcast to signal to other nodes in the local network that they can connect.
*/
#define Headers_Beacon_PASSWORD_LEN 20
struct Headers_Beacon {
uint32_t version_be;
uint8_t password[Headers_Beacon_PASSWORD_LEN];
uint8_t publicKey[32];
};
#define Headers_Beacon_SIZE 56
Assert_compileTime(sizeof(struct Headers_Beacon) == Headers_Beacon_SIZE);
#endif
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