static void on_connect(h2o_socket_t *sock, const char *err)
{
h2o_socketpool_connect_request_t *req = sock->data;
const char *errstr = NULL;
assert(req->sock == sock);
if (err != NULL) {
__sync_sub_and_fetch(&req->pool->targets.entries[req->selected_target]->_shared.leased_count, 1);
h2o_socket_close(sock);
if (req->remaining_try_count == 0) {
req->sock = NULL;
errstr = "connection failed"; /* shouldn't we return err? */
} else {
try_connect(req);
return;
}
} else {
h2o_url_t *target_url = &req->pool->targets.entries[req->selected_target]->url;
if (target_url->scheme->is_ssl) {
assert(req->pool->_ssl_ctx != NULL && "h2o_socketpool_set_ssl_ctx must be called for a pool that contains SSL target");
h2o_socket_ssl_handshake(sock, req->pool->_ssl_ctx, target_url->host.base, on_handshake_complete);
return;
}
}
call_connect_cb(req, errstr);
}
static void start_connect(h2o_socketpool_connect_request_t *req, struct sockaddr *addr, socklen_t addrlen)
{
req->sock = h2o_socket_connect(req->loop, addr, addrlen, on_connect);
if (req->sock == NULL) {
__sync_sub_and_fetch(&req->pool->_shared.count, 1);
call_connect_cb(req, "failed to connect to host");
return;
}
req->sock->data = req;
req->sock->on_close.cb = on_close;
req->sock->on_close.data = req->pool;
}
static void on_connect(h2o_socket_t *sock, int status)
{
h2o_socketpool_connect_request_t *req = sock->data;
const char *errstr = NULL;
assert(req->sock == sock);
if (status != 0) {
h2o_socket_close(sock);
req->sock = NULL;
errstr = "connection failed";
}
call_connect_cb(req, errstr);
}
static void on_getaddr(h2o_hostinfo_getaddr_req_t *getaddr_req, const char *errstr, struct addrinfo *res)
{
h2o_socketpool_connect_request_t *req = H2O_STRUCT_FROM_MEMBER(h2o_socketpool_connect_request_t, getaddr_req, getaddr_req);
if (errstr != NULL) {
__sync_sub_and_fetch(&req->pool->_shared.count, 1);
call_connect_cb(req, errstr);
return;
}
struct addrinfo *selected = h2o_hostinfo_select_one(res);
start_connect(req, selected->ai_addr, selected->ai_addrlen);
freeaddrinfo(res);
}
static void on_handshake_complete(h2o_socket_t *sock, const char *err)
{
h2o_socketpool_connect_request_t *req = sock->data;
assert(req->sock == sock);
if (err == h2o_socket_error_ssl_cert_name_mismatch && (SSL_CTX_get_verify_mode(req->pool->_ssl_ctx) & SSL_VERIFY_PEER) == 0) {
/* ignore CN mismatch if we are not verifying peer */
} else if (err != NULL) {
h2o_socket_close(sock);
req->sock = NULL;
}
call_connect_cb(req, err);
}
static void on_getaddr(h2o_hostinfo_getaddr_req_t *getaddr_req, const char *errstr, struct addrinfo *res, void *_req)
{
h2o_socketpool_connect_request_t *req = _req;
assert(getaddr_req == req->getaddr_req);
req->getaddr_req = NULL;
if (errstr != NULL) {
__sync_sub_and_fetch(&req->pool->_shared.count, 1);
call_connect_cb(req, errstr);
return;
}
struct addrinfo *selected = h2o_hostinfo_select_one(res);
start_connect(req, selected->ai_addr, selected->ai_addrlen);
}
static void start_connect(h2o_socketpool_connect_request_t *req, struct sockaddr *addr, socklen_t addrlen)
{
struct on_close_data_t *close_data;
req->sock = h2o_socket_connect(req->loop, addr, addrlen, on_connect);
if (req->sock == NULL) {
__sync_sub_and_fetch(&req->pool->targets.entries[req->selected_target]->_shared.leased_count, 1);
if (req->remaining_try_count > 0) {
try_connect(req);
return;
}
__sync_sub_and_fetch(&req->pool->_shared.count, 1);
call_connect_cb(req, "failed to connect to host");
return;
}
close_data = h2o_mem_alloc(sizeof(*close_data));
close_data->pool = req->pool;
close_data->target = req->selected_target;
req->sock->data = req;
req->sock->on_close.cb = on_close;
req->sock->on_close.data = close_data;
}