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dnsquery
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Allow the DNS server to be selected.

This commit is contained in:
Érico Nogueira 2021-08-18 12:14:37 -03:00
parent 4a35a8b4a8
commit 768c01cfdf
1 changed files with 4 additions and 3 deletions
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7
dnsquery.c
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@ -99,12 +99,13 @@ static void add_q(uint8_t *q, size_t *index, const char *qname, uint16_t qtype,
int main(int argc, char **argv)
{
const char *query = "google.com";
const char *query = "google.com", *server = "127.0.0.1";
int c, get_aaaa = 0;
while ((c = getopt(argc, argv, "46d:")) != -1) {
while ((c = getopt(argc, argv, "46d:s:")) != -1) {
if (c == '4') get_aaaa = 0;
else if (c == '6') get_aaaa = 1;
else if (c == 'd') query = optarg;
else if (c == 's' && strcmp(optarg, "localhost")) server = optarg;
else e("bad options");
}
@ -135,7 +136,7 @@ int main(int argc, char **argv)
q[5] = BYTE1(qdcount);
int s = socket(AF_INET, SOCK_DGRAM, 0);
struct sockaddr_in addr = {.sin_family=AF_INET, .sin_port=htons(53), .sin_addr=inet_addr("127.0.0.1")};
struct sockaddr_in addr = {.sin_family=AF_INET, .sin_port=htons(53), .sin_addr=inet_addr(server)};
void *ap = &addr;
sendto(s, q, i, 0, ap, sizeof addr);