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/*
* Logical Router functions.
* Copyright (C) 2018 6WIND S.A.
*
* 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 2 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; see the file COPYING; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <zebra.h>
#include "ns.h"
#include "log.h"
#include "memory.h"
#include "command.h"
#include "vty.h"
#include "logicalrouter.h"
/* Comment that useless define to avoid compilation error
* in order to use it, one could provide the kind of NETNS to NS backend
* so that the allocation will match the logical router
* DEFINE_MTYPE_STATIC(LIB, LOGICALROUTER, "LogicalRouter Context")
*/
DEFINE_MTYPE_STATIC(LIB, LOGICALROUTER_NAME, "Logical Router Name")
/* Logical Router node has no interface. */
static struct cmd_node logicalrouter_node = {LOGICALROUTER_NODE, "", 1};
static int logicalrouter_backend;
/* Get a NS. If not found, create one. */
static struct ns *logicalrouter_get(ns_id_t ns_id)
{
struct ns *ns;
ns = ns_lookup(ns_id);
if (ns)
return (ns);
ns = ns_get_created(ns, NULL, ns_id);
return ns;
}
static int logicalrouter_is_backend_netns(void)
{
return (logicalrouter_backend == LOGICALROUTER_BACKEND_NETNS);
}
DEFUN_NOSH (logicalrouter,
logicalrouter_cmd,
"logical-router (1-65535) ns NAME",
"Enable a logical-router\n"
"Specify the logical-router indentifier\n"
"The Name Space\n"
"The file name in " NS_RUN_DIR ", or a full pathname\n")
{
int idx_number = 1;
int idx_name = 3;
ns_id_t ns_id;
struct ns *ns = NULL;
char *pathname = ns_netns_pathname(vty, argv[idx_name]->arg);
if (!pathname)
return CMD_WARNING_CONFIG_FAILED;
ns_id = strtoul(argv[idx_number]->arg, NULL, 10);
ns = logicalrouter_get(ns_id);
if (ns->name && strcmp(ns->name, pathname) != 0) {
vty_out(vty, "NS %u is already configured with NETNS %s\n",
ns->ns_id, ns->name);
return CMD_WARNING;
}
if (!ns->name)
ns->name = XSTRDUP(MTYPE_LOGICALROUTER_NAME, pathname);
if (!ns_enable(ns, NULL)) {
vty_out(vty, "Can not associate NS %u with NETNS %s\n",
ns->ns_id, ns->name);
return CMD_WARNING_CONFIG_FAILED;
}
return CMD_SUCCESS;
}
DEFUN (no_logicalrouter,
no_logicalrouter_cmd,
"no logical-router (1-65535) ns NAME",
NO_STR
"Enable a Logical-Router\n"
"Specify the Logical-Router identifier\n"
"The Name Space\n"
"The file name in " NS_RUN_DIR ", or a full pathname\n")
{
int idx_number = 2;
int idx_name = 4;
ns_id_t ns_id;
struct ns *ns = NULL;
char *pathname = ns_netns_pathname(vty, argv[idx_name]->arg);
if (!pathname)
return CMD_WARNING_CONFIG_FAILED;
ns_id = strtoul(argv[idx_number]->arg, NULL, 10);
ns = ns_lookup(ns_id);
if (!ns) {
vty_out(vty, "NS %u is not found\n", ns_id);
return CMD_SUCCESS;
}
if (ns->name && strcmp(ns->name, pathname) != 0) {
vty_out(vty, "Incorrect NETNS file name\n");
return CMD_WARNING_CONFIG_FAILED;
}
ns_disable(ns);
if (ns->name) {
XFREE(MTYPE_LOGICALROUTER_NAME, ns->name);
ns->name = NULL;
}
return CMD_SUCCESS;
}
/* Initialize NS module. */
void logicalrouter_init(int (*writefunc)(struct vty *vty))
{
if (ns_have_netns() && logicalrouter_is_backend_netns()) {
/* Install LogicalRouter commands. */
install_node(&logicalrouter_node, writefunc);
install_element(CONFIG_NODE, &logicalrouter_cmd);
install_element(CONFIG_NODE, &no_logicalrouter_cmd);
}
}
void logicalrouter_terminate(void)
{
ns_terminate();
}
void logicalrouter_configure_backend(int backend_netns)
{
logicalrouter_backend = backend_netns;
}
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