/* lookup address, returns entry if found and not stale */
static struct Curl_dns_entry *
fetch_addr(struct connectdata *conn,
const char *hostname,
int port)
{
char *entry_id = NULL;
struct Curl_dns_entry *dns = NULL;
size_t entry_len;
struct SessionHandle *data = conn->data;
/* Create an entry id, based upon the hostname and port */
entry_id = create_hostcache_id(hostname, port);
/* If we can't create the entry id, fail */
if(!entry_id)
return dns;
entry_len = strlen(entry_id);
/* See if its already in our dns cache */
dns = Curl_hash_pick(data->dns.hostcache, entry_id, entry_len+1);
if(dns && (data->set.dns_cache_timeout != -1)) {
/* See whether the returned entry is stale. Done before we release lock */
struct hostcache_prune_data user;
time(&user.now);
user.cache_timeout = data->set.dns_cache_timeout;
if(hostcache_timestamp_remove(&user, dns)) {
infof(data, "Hostname in DNS cache was stale, zapped\n");
dns = NULL; /* the memory deallocation is being handled by the hash */
Curl_hash_delete(data->dns.hostcache, entry_id, entry_len+1);
}
}
/* free the allocated entry_id again */
free(entry_id);
return dns;
}
static void conncache_remove_bundle(struct conncache *connc,
struct connectbundle *bundle)
{
struct curl_hash_iterator iter;
struct curl_hash_element *he;
if(!connc)
return;
Curl_hash_start_iterate(&connc->hash, &iter);
he = Curl_hash_next_element(&iter);
while(he) {
if(he->ptr == bundle) {
/* The bundle is destroyed by the hash destructor function,
free_bundle_hash_entry() */
Curl_hash_delete(&connc->hash, he->key, he->key_len);
return;
}
he = Curl_hash_next_element(&iter);
}
}
static int on_stream_close(nghttp2_session *session, int32_t stream_id,
uint32_t error_code, void *userp)
{
struct connectdata *conn = (struct connectdata *)userp;
struct SessionHandle *data_s;
struct HTTP *stream;
(void)session;
(void)stream_id;
DEBUGF(infof(conn->data, "on_stream_close(), error_code = %d, stream %u\n",
error_code, stream_id));
if(stream_id) {
/* get the stream from the hash based on Stream ID, stream ID zero is for
connection-oriented stuff */
data_s = Curl_hash_pick(&conn->proto.httpc.streamsh, &stream_id,
sizeof(stream_id));
if(!data_s) {
/* We could get stream ID not in the hash. For example, if we
decided to reject stream (e.g., PUSH_PROMISE). We call infof
as a debugging purpose for now. */
infof(conn->data,
"Received frame on Stream ID: %x not in stream hash!\n",
stream_id);
return 0;
}
stream = data_s->req.protop;
stream->error_code = error_code;
stream->closed = TRUE;
/* remove the entry from the hash as the stream is now gone */
Curl_hash_delete(&conn->proto.httpc.streamsh,
&stream_id, sizeof(stream_id));
DEBUGF(infof(conn->data, "Removed stream %u hash!\n", stream_id));
}
return 0;
}
CURLcode Curl_loadhostpairs(struct SessionHandle *data)
{
struct curl_slist *hostp;
char hostname[256];
char address[256];
int port;
for(hostp = data->change.resolve; hostp; hostp = hostp->next) {
if(!hostp->data)
continue;
if(hostp->data[0] == '-') {
char *entry_id;
size_t entry_len;
if(2 != sscanf(hostp->data + 1, "%255[^:]:%d", hostname, &port)) {
infof(data, "Couldn't parse CURLOPT_RESOLVE removal entry '%s'!\n",
hostp->data);
continue;
}
/* Create an entry id, based upon the hostname and port */
entry_id = create_hostcache_id(hostname, port);
/* If we can't create the entry id, fail */
if(!entry_id) {
return CURLE_OUT_OF_MEMORY;
}
entry_len = strlen(entry_id);
if(data->share)
Curl_share_lock(data, CURL_LOCK_DATA_DNS, CURL_LOCK_ACCESS_SINGLE);
/* delete entry, ignore if it didn't exist */
Curl_hash_delete(data->dns.hostcache, entry_id, entry_len+1);
if(data->share)
Curl_share_unlock(data, CURL_LOCK_DATA_DNS);
/* free the allocated entry_id again */
free(entry_id);
}
else {
struct Curl_dns_entry *dns;
Curl_addrinfo *addr;
char *entry_id;
size_t entry_len;
if(3 != sscanf(hostp->data, "%255[^:]:%d:%255s", hostname, &port,
address)) {
infof(data, "Couldn't parse CURLOPT_RESOLVE entry '%s'!\n",
hostp->data);
continue;
}
addr = Curl_str2addr(address, port);
if(!addr) {
infof(data, "Address in '%s' found illegal!\n", hostp->data);
continue;
}
/* Create an entry id, based upon the hostname and port */
entry_id = create_hostcache_id(hostname, port);
/* If we can't create the entry id, fail */
if(!entry_id) {
Curl_freeaddrinfo(addr);
return CURLE_OUT_OF_MEMORY;
}
entry_len = strlen(entry_id);
if(data->share)
Curl_share_lock(data, CURL_LOCK_DATA_DNS, CURL_LOCK_ACCESS_SINGLE);
/* See if its already in our dns cache */
dns = Curl_hash_pick(data->dns.hostcache, entry_id, entry_len+1);
/* free the allocated entry_id again */
free(entry_id);
if(!dns) {
/* if not in the cache already, put this host in the cache */
dns = Curl_cache_addr(data, addr, hostname, port);
if(dns) {
dns->timestamp = 0; /* mark as added by CURLOPT_RESOLVE */
/* release the returned reference; the cache itself will keep the
* entry alive: */
dns->inuse--;
}
}
else
/* this is a duplicate, free it again */
Curl_freeaddrinfo(addr);
if(data->share)
Curl_share_unlock(data, CURL_LOCK_DATA_DNS);
if(!dns) {
Curl_freeaddrinfo(addr);
return CURLE_OUT_OF_MEMORY;
}
infof(data, "Added %s:%d:%s to DNS cache\n",
hostname, port, address);
}
}
data->change.resolve = NULL; /* dealt with now */
return CURLE_OK;
}
