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/* Copyright (C) 2022 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "knot/common/log.h"
#include "knot/ctl/commands.h"
#include "knot/ctl/process.h"
#include "libknot/error.h"
#include "contrib/string.h"
int ctl_process(knot_ctl_t *ctl, server_t *server)
{
if (ctl == NULL || server == NULL) {
return KNOT_EINVAL;
}
ctl_args_t args = {
.ctl = ctl,
.type = KNOT_CTL_TYPE_END,
.server = server
};
// Strip redundant/unprocessed data units in the current block.
bool strip = false;
while (true) {
// Receive data unit.
int ret = knot_ctl_receive(args.ctl, &args.type, &args.data);
if (ret != KNOT_EOK) {
log_ctl_debug("control, failed to receive (%s)",
knot_strerror(ret));
return ret;
}
// Decide what to do.
switch (args.type) {
case KNOT_CTL_TYPE_DATA:
// Leading data unit with a command name.
if (!strip) {
// Set to strip unprocessed data unit.
strip = true;
break;
}
// FALLTHROUGH
case KNOT_CTL_TYPE_EXTRA:
// All non-first data units should be parsed in a callback.
// Ignore if probable previous error.
continue;
case KNOT_CTL_TYPE_BLOCK:
strip = false;
continue;
case KNOT_CTL_TYPE_END:
return KNOT_EOF;
default:
assert(0);
}
strtolower((char *)args.data[KNOT_CTL_IDX_ZONE]);
const char *cmd_name = args.data[KNOT_CTL_IDX_CMD];
const char *zone_name = args.data[KNOT_CTL_IDX_ZONE];
ctl_cmd_t cmd = ctl_str_to_cmd(cmd_name);
if (cmd == CTL_CONF_LIST) {
log_ctl_debug("control, received command '%s'", cmd_name);
} else if (cmd != CTL_NONE) {
if (zone_name != NULL) {
log_ctl_zone_str_info(zone_name,
"control, received command '%s'", cmd_name);
} else {
log_ctl_info("control, received command '%s'", cmd_name);
}
} else if (cmd_name != NULL){
log_ctl_debug("control, invalid command '%s'", cmd_name);
continue;
} else {
log_ctl_debug("control, empty command");
continue;
}
// Execute the command.
int cmd_ret = ctl_exec(cmd, &args);
switch (cmd_ret) {
case KNOT_EOK:
strip = false;
case KNOT_CTL_ESTOP:
case KNOT_CTL_EZONE:
// KNOT_CTL_EZONE - don't change strip, but don't be reported
// as a ctl/communication error either.
break;
default:
log_ctl_debug("control, command '%s' (%s)", cmd_name,
knot_strerror(cmd_ret));
break;
}
// Finalize the answer block.
ret = knot_ctl_send(ctl, KNOT_CTL_TYPE_BLOCK, NULL);
if (ret != KNOT_EOK) {
log_ctl_debug("control, failed to reply (%s)",
knot_strerror(ret));
}
// Stop if required.
if (cmd_ret == KNOT_CTL_ESTOP) {
// Finalize the answer message.
ret = knot_ctl_send(ctl, KNOT_CTL_TYPE_END, NULL);
if (ret != KNOT_EOK) {
log_ctl_debug("control, failed to reply (%s)",
knot_strerror(ret));
}
return cmd_ret;
}
}
}
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