dns3_test now automatically does the DNS request.

tox_decrypt_dns3_TXT no longer needs id_record to be null terminated.

testing/dns3_test.c

@@ -2,8 +2,45 @@
 
 #include "../toxdns/toxdns.h"
 #include "../toxcore/tox.h"
+#include "../toxcore/network.h"
 #include "misc_tools.c"
 
+#if defined(_WIN32) || defined(__WIN32__) || defined (WIN32)
+
+#define c_sleep(x) Sleep(1*x)
+
+#else
+#define c_sleep(x) usleep(1000*x)
+
+#endif
+
+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[])
 {
@@ -13,6 +50,22 @@ int main(int argc, char *argv[])
         exit(0);
     }
 
+    IP ip = {0};
+    ip.family = AF_INET;
+    sock_t sock = socket(ip.family, SOCK_DGRAM, IPPROTO_UDP);
+
+    if (!sock_valid(sock))
+        return -1;
+
+    if (!addr_resolve_or_parse_ip(argv[1], &ip, 0))
+        return -1;
+
+    struct sockaddr_in target;
+    size_t addrsize = sizeof(struct sockaddr_in);
+    target.sin_family = AF_INET;
+    target.sin_addr = ip.ip4.in_addr;
+    target.sin_port = htons(53);
+
     uint8_t string[1024] = {0};
     void *d = tox_dns3_new(hex_string_to_bin(argv[2]));
     unsigned int i;
@@ -30,13 +83,24 @@ int main(int argc, char *argv[])
     string[0] = '_';
     memcpy(string + len + 1, "._tox.", sizeof("._tox."));
     memcpy((char *)(string + len + 1 + sizeof("._tox.") - 1), argv[1], strlen(argv[1]));
-    printf("Do a DNS request and find the TXT record for:\n%s\nThen paste the contents of the data contained in the id field here:\n",
-           string);
+    uint8_t packet[512];
+    uint8_t id = rand();
+    uint32_t p_len = create_packet(packet, string, strlen((char *)string), id);
+
+    if (sendto(sock, (char *) packet, p_len, 0, (struct sockaddr *)&target, addrsize) != p_len)
+        return -1;
+
+    uint8_t buffer[512] = {};
+    int r_len = recv(sock, buffer, sizeof(buffer), 0);
+
+    if (r_len < (int)p_len)
+        return -1;
+
+    for (i = r_len - 1; i != 0 && buffer[i] != '='; --i);
 
-    scanf("%s", string);
     uint8_t tox_id[TOX_FRIEND_ADDRESS_SIZE];
 
-    if (tox_decrypt_dns3_TXT(d, tox_id, string, strlen((char *)string), request_id) != 0)
+    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]);

toxdns/toxdns.c

@@ -216,8 +216,11 @@ int tox_decrypt_dns3_TXT(void *dns3_object, uint8_t *tox_id, uint8_t *id_record,
     /*if (id_record_len > 255 || id_record_len <= (sizeof(uint32_t) + crypto_box_MACBYTES))
         return -1;*/
 
+    uint8_t id_record_null[id_record_len + 1];
+    memcpy(id_record_null, id_record, id_record_len);
+    id_record_null[id_record_len] = 0;
     uint8_t data[id_record_len];
-    int length = decode(data, id_record);
+    int length = decode(data, id_record_null);
 
     if (length == -1)
         return -1;