static uint16_t udp_checksum(struct ip *iphdr, struct udphdr *udphdr)
{
uint32_t sum = 0;
uint16_t res;
sum = raw_checksum((uint8_t *)&iphdr->ip_src, 2 * sizeof(iphdr->ip_src),
IPPROTO_UDP + (uint32_t)(UDP_HLEN + payload_len));
sum = raw_checksum((uint8_t *)udphdr, UDP_HLEN, sum);
sum = raw_checksum((uint8_t *)udp_payload, payload_len, sum);
res = 0xffff & ~sum;
if (res)
return htons(res);
else
return CSUM_MANGLED_0;
}
char *SQLite3_result::checksum() {
uint64_t hash1=raw_checksum();
char buf[128];
uint32_t d32[2];
memcpy(&d32,&hash1,sizeof(hash1));
sprintf(buf,"0x%X%X", d32[0], d32[1]);
return strdup(buf);
}
uint64_t addr_key_checksum(const output_point& outpoint)
{
data_chunk checksum_data(hash_digest_size + 4);
auto serial = make_serializer(checksum_data.begin());
serial.write_hash(outpoint.hash);
serial.write_4_bytes(outpoint.index);
BITCOIN_ASSERT(serial.iterator() == checksum_data.end());
hash_digest hash = generate_sha256_hash(checksum_data);
data_chunk raw_checksum(hash.begin(), hash.begin() + 8);
return cast_chunk<uint64_t>(raw_checksum);
}
