C++ (Cpp) CBNewVersion Examples

Example #1

File: pingpong.c Project: LiveByTheCode-DieByTheCode--Java/cbitcoin

static void
send_version() 
{
    CBByteArray *ip = CBNewByteArrayWithDataCopy((uint8_t [16]){0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF, 127, 0, 0, 1}, 16);
    CBByteArray *ua = CBNewByteArrayFromString("cmsc417versiona", '\00');
    CBNetworkAddress * sourceAddr = CBNewNetworkAddress(0, ip, 0, CB_SERVICE_FULL_BLOCKS, false);
    int32_t vers = 70001;
    int nonce = rand();
    CBVersion * version = CBNewVersion(vers, CB_SERVICE_FULL_BLOCKS, time(NULL), &peer->base, sourceAddr, nonce, ua, 0);
    CBMessage *message = CBGetMessage(version);
    char header[24];
    memcpy(header + CB_MESSAGE_HEADER_TYPE, "version\0\0\0\0\0", 12);

    /* Compute length, serialized, and checksum */
    uint32_t len = CBVersionCalculateLength(version);
    message->bytes = CBNewByteArrayOfSize(len);
    len = CBVersionSerialise(version, false);
    if (message->bytes) {
        // Make checksum
        uint8_t hash[32];
        uint8_t hash2[32];
        CBSha256(CBByteArrayGetData(message->bytes), message->bytes->length, hash);
        CBSha256(hash, 32, hash2);
        message->checksum[0] = hash2[0];
        message->checksum[1] = hash2[1];
        message->checksum[2] = hash2[2];
        message->checksum[3] = hash2[3];
    }
    CBInt32ToArray(header, CB_MESSAGE_HEADER_NETWORK_ID, NETMAGIC);
    CBInt32ToArray(header, CB_MESSAGE_HEADER_LENGTH, message->bytes->length);
    // Checksum
    memcpy(header + CB_MESSAGE_HEADER_CHECKSUM, message->checksum, 4);

    // Send the header
    send(sd, header, 24, 0);
    
    // Send the message
    printf("message len: %d\n", message->bytes->length);
    printf("checksum: %x\n", *((uint32_t *) message->checksum));
    send(sd, message->bytes->sharedData->data+message->bytes->offset, message->bytes->length, 0);
    print_hex(message->bytes);
}

Example #2

File: BRConnection.c Project: rowanbrendan/cbitcoin

void BRSendVersion(BRConnection *c) {
    /* current version number according to http://bitcoin.stackexchange.com/questions/13537/how-do-i-find-out-what-the-latest-protocol-version-is */
    CBVersionServices services = CB_SERVICE_FULL_BLOCKS;
    int64_t t = time(NULL);
    CBNetworkAddress *r_addr = c->address;
    CBNetworkAddress *s_addr = c->my_address;
    uint64_t nonce = rand();
    CBByteArray *ua = CBNewByteArrayFromString("br_cmsc417_v0.1", false);
    int32_t block_height = 0; /* TODO get real number */

    CBVersion *v = CBNewVersion(VERSION_NUM, services, t, r_addr, s_addr,
            nonce, ua, block_height);
    uint32_t length = CBVersionCalculateLength(v);
    v->base.bytes = CBNewByteArrayOfSize(length);
    CBVersionSerialise(v, false);

    BRSendMessage(c, &v->base, "version");

    /* don't release remote and local addresses just yet.
     * need them for other messages */
    CBReleaseObject(ua);
    CBFreeVersion(v);
}