/*
* curl_easy_init() is the external interface to alloc, setup and init an
* easy handle that is returned. If anything goes wrong, NULL is returned.
*/
CURL *curl_easy_init(void)
{
CURLcode res;
struct SessionHandle *data;
/* Make sure we inited the global SSL stuff */
if (!initialized) {
res = curl_global_init(CURL_GLOBAL_DEFAULT);
if(res)
/* something in the global init failed, return nothing */
return NULL;
}
/* We use curl_open() with undefined URL so far */
res = Curl_open(&data);
if(res != CURLE_OK)
return NULL;
return data;
}
/*
* curl_easy_init() is the external interface to alloc, setup and init an
* easy handle that is returned. If anything goes wrong, NULL is returned.
*/
struct Curl_easy *curl_easy_init(void)
{
CURLcode result;
struct Curl_easy *data;
/* Make sure we inited the global SSL stuff */
if(!initialized) {
result = curl_global_init(CURL_GLOBAL_DEFAULT);
if(result) {
/* something in the global init failed, return nothing */
DEBUGF(fprintf(stderr, "Error: curl_global_init failed\n"));
return NULL;
}
}
/* We use curl_open() with undefined URL so far */
result = Curl_open(&data);
if(result) {
DEBUGF(fprintf(stderr, "Error: Curl_open failed\n"));
return NULL;
}
return data;
}
static CURLcode dohprobe(struct Curl_easy *data,
struct dnsprobe *p, DNStype dnstype,
const char *host,
const char *url, CURLM *multi,
struct curl_slist *headers)
{
struct Curl_easy *doh = NULL;
char *nurl = NULL;
CURLcode result = CURLE_OK;
timediff_t timeout_ms;
DOHcode d = doh_encode(host, dnstype, p->dohbuffer, sizeof(p->dohbuffer),
&p->dohlen);
if(d) {
failf(data, "Failed to encode DOH packet [%d]\n", d);
return CURLE_OUT_OF_MEMORY;
}
p->dnstype = dnstype;
p->serverdoh.memory = NULL;
/* the memory will be grown as needed by realloc in the doh_write_cb
function */
p->serverdoh.size = 0;
/* Note: this is code for sending the DoH request with GET but there's still
no logic that actually enables this. We should either add that ability or
yank out the GET code. Discuss! */
if(data->set.doh_get) {
char *b64;
size_t b64len;
result = Curl_base64url_encode(data, (char *)p->dohbuffer, p->dohlen,
&b64, &b64len);
if(result)
goto error;
nurl = aprintf("%s?dns=%s", url, b64);
free(b64);
if(!nurl) {
result = CURLE_OUT_OF_MEMORY;
goto error;
}
url = nurl;
}
timeout_ms = Curl_timeleft(data, NULL, TRUE);
/* Curl_open() is the internal version of curl_easy_init() */
result = Curl_open(&doh);
if(!result) {
/* pass in the struct pointer via a local variable to please coverity and
the gcc typecheck helpers */
struct dohresponse *resp = &p->serverdoh;
ERROR_CHECK_SETOPT(CURLOPT_URL, url);
ERROR_CHECK_SETOPT(CURLOPT_WRITEFUNCTION, doh_write_cb);
ERROR_CHECK_SETOPT(CURLOPT_WRITEDATA, resp);
if(!data->set.doh_get) {
ERROR_CHECK_SETOPT(CURLOPT_POSTFIELDS, p->dohbuffer);
ERROR_CHECK_SETOPT(CURLOPT_POSTFIELDSIZE, (long)p->dohlen);
}
ERROR_CHECK_SETOPT(CURLOPT_HTTPHEADER, headers);
#ifdef USE_NGHTTP2
ERROR_CHECK_SETOPT(CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_2TLS);
#endif
#ifndef CURLDEBUG
/* enforce HTTPS if not debug */
ERROR_CHECK_SETOPT(CURLOPT_PROTOCOLS, CURLPROTO_HTTPS);
#endif
ERROR_CHECK_SETOPT(CURLOPT_TIMEOUT_MS, (long)timeout_ms);
ERROR_CHECK_SETOPT(CURLOPT_VERBOSE, 1L);
doh->set.fmultidone = Curl_doh_done;
doh->set.dohfor = data; /* identify for which transfer this is done */
p->easy = doh;
/* add this transfer to the multi handle */
if(curl_multi_add_handle(multi, doh))
goto error;
}
else
goto error;
free(nurl);
return CURLE_OK;
error:
free(nurl);
Curl_close(doh);
return result;
}
