int tube_setup_bg_write(struct tube* tube, struct comm_base* base)
{
if(!(tube->res_com = comm_point_create_raw(base, tube->sw,
1, tube_handle_write, tube))) {
int err = errno;
log_err("tube_setup_bg_w: commpoint creation failed");
errno = err;
return 0;
}
return 1;
}
int tube_setup_bg_listen(struct tube* tube, struct comm_base* base,
tube_callback_t* cb, void* arg)
{
tube->listen_cb = cb;
tube->listen_arg = arg;
if(!(tube->listen_com = comm_point_create_raw(base, tube->sr,
0, tube_handle_listen, tube))) {
int err = errno;
log_err("tube_setup_bg_l: commpoint creation failed");
errno = err;
return 0;
}
return 1;
}
/** open accept commpoint */
static int
accept_open(struct daemon_remote* rc, int fd)
{
struct listen_list* n = (struct listen_list*)malloc(sizeof(*n));
if(!n) {
log_err("out of memory");
return 0;
}
n->next = rc->accept_list;
rc->accept_list = n;
/* open commpt */
n->com = comm_point_create_raw(rc->worker->base, fd, 0,
&remote_accept_callback, rc);
if(!n->com)
return 0;
/* keep this port open, its fd is kept in the rc portlist */
n->com->do_not_close = 1;
return 1;
}
int remote_accept_callback(struct comm_point* c, void* arg, int err,
struct comm_reply* ATTR_UNUSED(rep))
{
struct daemon_remote* rc = (struct daemon_remote*)arg;
struct sockaddr_storage addr;
socklen_t addrlen;
int newfd;
struct rc_state* n;
if(err != NETEVENT_NOERROR) {
log_err("error %d on remote_accept_callback", err);
return 0;
}
/* perform the accept */
newfd = comm_point_perform_accept(c, &addr, &addrlen);
if(newfd == -1)
return 0;
/* create new commpoint unless we are servicing already */
if(rc->active >= rc->max_active) {
log_warn("drop incoming remote control: too many connections");
comm_point_stop_listening(c);
close_exit:
#ifndef USE_WINSOCK
close(newfd);
#else
closesocket(newfd);
#endif
return 0;
}
/* setup commpoint to service the remote control command */
n = (struct rc_state*)calloc(1, sizeof(*n));
if(!n) {
log_err("out of memory");
goto close_exit;
}
/* start in reading state */
n->c = comm_point_create_raw(rc->worker->base, newfd, 0,
&remote_control_callback, n);
if(!n->c) {
log_err("out of memory");
free(n);
goto close_exit;
}
log_addr(VERB_QUERY, "new control connection from", &addr, addrlen);
n->c->do_not_close = 0;
comm_point_stop_listening(n->c);
comm_point_start_listening(n->c, -1, REMOTE_CONTROL_TCP_TIMEOUT);
memcpy(&n->c->repinfo.addr, &addr, addrlen);
n->c->repinfo.addrlen = addrlen;
n->shake_state = rc_hs_read;
n->ssl = SSL_new(rc->ctx);
if(!n->ssl) {
log_crypto_err("could not SSL_new");
free(n);
goto close_exit;
}
SSL_set_accept_state(n->ssl);
(void)SSL_set_mode(n->ssl, SSL_MODE_AUTO_RETRY);
if(!SSL_set_fd(n->ssl, newfd)) {
log_crypto_err("could not SSL_set_fd");
SSL_free(n->ssl);
free(n);
goto close_exit;
}
n->rc = rc;
n->next = rc->busy_list;
rc->busy_list = n;
rc->active ++;
/* perform the first nonblocking read already, for windows,
* so it can return wouldblock. could be faster too. */
(void)remote_control_callback(n->c, n, NETEVENT_NOERROR, NULL);
return 0;
}