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dnsquery
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Add command line options. 

- choose between A and AAAA records (ipv4 or ipv6)
- select a non hardcoded domain
This commit is contained in:
Érico Nogueira 2021-08-18 11:46:37 -03:00
parent 3adefb94a0
commit f6c29d9d62
1 changed files with 11 additions and 3 deletions
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14
dnsquery.c
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@ -94,8 +94,17 @@ static void add_q(uint8_t *q, size_t *index, const char *qname, uint16_t qtype,
*qdcount_written += 1;
}
int main()
int main(int argc, char **argv)
{
const char *query = "google.com";
int c, get_aaaa = 0;
while ((c = getopt(argc, argv, "46d:")) != -1) {
if (c == '4') get_aaaa = 0;
else if (c == '6') get_aaaa = 1;
else if (c == 'd') query = optarg;
else e("bad options");
}
uint8_t q[256], r[1024];
/* query id */
@ -118,8 +127,7 @@ int main()
size_t i = 12;
uint16_t qdcount = 0;
add_q(q, &i, "google.com", QTYPE_A, QCLASS_IN, &qdcount);
//add_q(q, &i, "google.com", QTYPE_AAAA, QCLASS_IN, &qdcount);
add_q(q, &i, query, get_aaaa ? QTYPE_AAAA : QTYPE_A, QCLASS_IN, &qdcount);
q[4] = BYTE2(qdcount);
q[5] = BYTE1(qdcount);