const struct in_addr *src,
const struct in_addr *dst)
{
+ GNUNET_assert (20 == sizeof (struct GNUNET_TUN_IPv4Header));
GNUNET_assert (payload_length <= UINT16_MAX - sizeof (struct GNUNET_TUN_IPv4Header));
memset (ip, 0, sizeof (struct GNUNET_TUN_IPv4Header));
ip->header_length = sizeof (struct GNUNET_TUN_IPv4Header) / 4;
ip->version = 4;
ip->total_length = htons (sizeof (struct GNUNET_TUN_IPv4Header) + payload_length);
- ip->identification = (uint16_t) GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
+ ip->identification = (uint16_t) GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
65536);
ip->ttl = FRESH_TTL;
ip->protocol = protocol;
const struct in6_addr *src,
const struct in6_addr *dst)
{
+ GNUNET_assert (40 == sizeof (struct GNUNET_TUN_IPv6Header));
GNUNET_assert (payload_length <= UINT16_MAX - sizeof (struct GNUNET_TUN_IPv6Header));
memset (ip, 0, sizeof (struct GNUNET_TUN_IPv6Header));
ip->version = 6;
ip->payload_length = htons ((uint16_t) payload_length);
ip->hop_limit = FRESH_TTL;
ip->destination_address = *dst;
- ip->source_address = *src;
+ ip->source_address = *src;
}
uint32_t sum;
uint16_t tmp;
+ GNUNET_assert (20 == sizeof (struct GNUNET_TUN_TcpHeader));
GNUNET_assert (payload_length + sizeof (struct GNUNET_TUN_IPv4Header) + sizeof (struct GNUNET_TUN_TcpHeader) ==
ntohs (ip->total_length));
GNUNET_assert (IPPROTO_TCP == ip->protocol);
tcp->crc = 0;
- sum = GNUNET_CRYPTO_crc16_step (0,
+ sum = GNUNET_CRYPTO_crc16_step (0,
&ip->source_address,
sizeof (struct in_addr) * 2);
tmp = htons (IPPROTO_TCP);
uint32_t sum;
uint32_t tmp;
+ GNUNET_assert (20 == sizeof (struct GNUNET_TUN_TcpHeader));
GNUNET_assert (payload_length + sizeof (struct GNUNET_TUN_TcpHeader) ==
ntohs (ip->payload_length));
GNUNET_assert (IPPROTO_TCP == ip->next_header);
uint32_t sum;
uint16_t tmp;
+ GNUNET_assert (8 == sizeof (struct GNUNET_TUN_UdpHeader));
GNUNET_assert (payload_length + sizeof (struct GNUNET_TUN_IPv4Header) + sizeof (struct GNUNET_TUN_UdpHeader) ==
ntohs (ip->total_length));
GNUNET_assert (IPPROTO_UDP == ip->protocol);
udp->crc = 0; /* technically optional, but we calculate it anyway, just to be sure */
- sum = GNUNET_CRYPTO_crc16_step (0,
+ sum = GNUNET_CRYPTO_crc16_step (0,
&ip->source_address,
sizeof (struct in_addr) * 2);
tmp = htons (IPPROTO_UDP);
- sum = GNUNET_CRYPTO_crc16_step (sum,
- &tmp,
+ sum = GNUNET_CRYPTO_crc16_step (sum,
+ &tmp,
sizeof (uint16_t));
tmp = htons (sizeof (struct GNUNET_TUN_UdpHeader) + payload_length);
- sum = GNUNET_CRYPTO_crc16_step (sum,
- &tmp,
+ sum = GNUNET_CRYPTO_crc16_step (sum,
+ &tmp,
sizeof (uint16_t));
- sum = GNUNET_CRYPTO_crc16_step (sum,
- udp,
+ sum = GNUNET_CRYPTO_crc16_step (sum,
+ udp,
sizeof (struct GNUNET_TUN_UdpHeader));
- sum = GNUNET_CRYPTO_crc16_step (sum,
+ sum = GNUNET_CRYPTO_crc16_step (sum,
payload,
payload_length);
udp->crc = GNUNET_CRYPTO_crc16_finish (sum);
{
uint32_t sum;
+ GNUNET_assert (8 == sizeof (struct GNUNET_TUN_IcmpHeader));
icmp->crc = 0;
sum = GNUNET_CRYPTO_crc16_step (0,
icmp,