toxcore/testing/dns3_test.c

#include "../toxcore/network.h"
#include "../toxcore/tox.h"
#include "../toxdns/toxdns.h"
#include "misc_tools.c"

static uint32_t create_packet(uint8_t *packet, uint8_t *string, uint8_t str_len, uint8_t id)
{
    memset(packet, 0, str_len + 13 + 16);
    packet[0] = id;
    packet[1] = rand();
    packet[5] = 1;
    packet[11] = 1;
    packet[12] = '.';
    memcpy(packet + 13, string, str_len);
    uint32_t i, c = 0;

    for (i = str_len + 12; i != 11; --i) {
        if (packet[i] == '.') {
            packet[i] = c;
            c = 0;
        } else {
            ++c;
        }
    }

    packet[str_len + 13 + 2] = 16;
    packet[str_len + 13 + 4] = 1;
    packet[str_len + 13 + 7] = 0x29;
    packet[str_len + 13 + 8] = 16;
    packet[str_len + 13 + 12] = 0x80;
    return str_len + 13 + 16;
}

int main(int argc, char *argv[])
{
    if (argc < 4) {
        printf("Usage: %s domain domain_public_key queried_username\nEX: %s utox.org D3154F65D28A5B41A05D4AC7E4B39C6B1C233CC857FB365C56E8392737462A12 username\n",
               argv[0], argv[0]);
        exit(0);
    }

    IP ip = {0};
    ip.family = TOX_AF_INET;
    Socket sock = net_socket(ip.family, TOX_SOCK_DGRAM, TOX_PROTO_UDP);

    if (!sock_valid(sock)) {
        return -1;
    }

    if (!addr_resolve_or_parse_ip(argv[1], &ip, 0)) {
        return -1;
    }

    uint32_t request_id;
    uint8_t string[1024] = {0};
    void *d = tox_dns3_new(hex_string_to_bin(argv[2]));
    int len = tox_generate_dns3_string(d, string + 1, sizeof(string) - 1, &request_id, (uint8_t *)argv[3], strlen(argv[3]));

    if (len == -1) {
        return -1;
    }

    string[0] = '_';
    memcpy(string + len + 1, "._tox.", sizeof("._tox."));
    memcpy((char *)(string + len + 1 + sizeof("._tox.") - 1), argv[1], strlen(argv[1]));
    uint8_t packet[512];
    uint8_t id = rand();
    uint32_t p_len = create_packet(packet, string, strlen((char *)string), id);

    IP_Port ip_port;
    ip_port.port = 53;
    ip_port.ip = ip;

    if (net_sendto_ip4(sock, (char *)packet, p_len, ip_port) != p_len) {
        return -1;
    }

    uint8_t buffer[512] = {0};
    int r_len = recv(sock, (char *)buffer, sizeof(buffer), 0);

    if (r_len < (int)p_len) {
        return -1;
    }

    unsigned int i;

    for (i = r_len - 1; i != 0 && buffer[i] != '='; --i) {
        ;
    }

    uint8_t tox_id[TOX_ADDRESS_SIZE];

    if (tox_decrypt_dns3_TXT(d, tox_id, buffer + i + 1, r_len - (i + 1), request_id) != 0) {
        return -1;
    }

    printf("The Tox id for username %s is:\n", argv[3]);

    //unsigned int i;
    for (i = 0; i < TOX_ADDRESS_SIZE; ++i) {
        printf("%02hhX", tox_id[i]);
    }

    printf("\n");
    return 0;
}