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/*
* Created by yuuta on 7/24/22.
*/
#include "handler.h"
#include "log.h"
#include <uv.h>
static uv_getaddrinfo_t resolv;
static struct addrinfo *ai = NULL;
static struct addrinfo *ai_current = NULL;
static void (*cb)(int status,
const struct addrinfo *,
void (*on_connect_result)(bool)) = NULL;
static void on_conn(bool res) {
if (res) {
uv_freeaddrinfo(ai);
ai = NULL;
ai_current = NULL;
cb = NULL;
return;
}
ai_current = ai_current->ai_next;
if (!ai_current) {
/* No more result available. */
cb(1, NULL, NULL);
uv_freeaddrinfo(ai);
ai = NULL;
ai_current = NULL;
cb = NULL;
return;
}
cb(0, ai_current, &on_conn);
}
static void on_resolv(uv_getaddrinfo_t *req, int status, struct addrinfo *res) {
LOGDV("on_resolv(req = %p): status = %d, res = %p",
req,
status,
res);
if (status) {
LOGEV("Cannot resolve host: %s", uv_strerror(status));
cb(status, NULL, NULL);
return;
}
ai = res;
ai_current = res;
cb(0, ai_current, &on_conn);
}
int a_dns(const char *host,
uint16_t port,
void (*c)(int status,
const struct addrinfo *,
void (*on_connect_result)(bool))) {
int r;
char service[6];
snprintf(service, 6, "%u", port);
cb = c;
if ((r = uv_getaddrinfo(loop, &resolv, on_resolv, host, service, NULL))) return r;
return 0;
}
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