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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <inttypes.h>
#include <netinet/in.h>
#include <linux/genetlink.h>
#include <linux/if_arp.h>
#include "batadv.h"
#include "fileio.h"
#include "netlink-util.h"
#include "network-internal.h"
#include "networkd-manager.h"
#include "parse-util.h"
#include "stdio-util.h"
#include "string-table.h"
#include "string-util.h"
static void batadv_init(NetDev *n) {
BatmanAdvanced *b;
b = BATADV(n);
/* Set defaults */
b->aggregation = true;
b->gateway_bandwidth_down = 10000;
b->gateway_bandwidth_up = 2000;
b->bridge_loop_avoidance = true;
b->distributed_arp_table = true;
b->fragmentation = true;
b->hop_penalty = 15;
b->originator_interval = 1000;
b->routing_algorithm = BATADV_ROUTING_ALGORITHM_BATMAN_V;
}
static const char* const batadv_gateway_mode_table[_BATADV_GATEWAY_MODE_MAX] = {
[BATADV_GATEWAY_MODE_OFF] = "off",
[BATADV_GATEWAY_MODE_CLIENT] = "client",
[BATADV_GATEWAY_MODE_SERVER] = "server",
};
static const char* const batadv_routing_algorithm_table[_BATADV_ROUTING_ALGORITHM_MAX] = {
[BATADV_ROUTING_ALGORITHM_BATMAN_V] = "batman-v",
[BATADV_ROUTING_ALGORITHM_BATMAN_IV] = "batman-iv",
};
static const char* const batadv_routing_algorithm_kernel_table[_BATADV_ROUTING_ALGORITHM_MAX] = {
[BATADV_ROUTING_ALGORITHM_BATMAN_V] = "BATMAN_V",
[BATADV_ROUTING_ALGORITHM_BATMAN_IV] = "BATMAN_IV",
};
DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING(batadv_gateway_mode, BatadvGatewayModes);
DEFINE_CONFIG_PARSE_ENUM(config_parse_batadv_gateway_mode, batadv_gateway_mode, BatadvGatewayModes,
"Failed to parse GatewayMode=");
DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING(batadv_routing_algorithm, BatadvRoutingAlgorithm);
DEFINE_CONFIG_PARSE_ENUM(config_parse_batadv_routing_algorithm, batadv_routing_algorithm, BatadvRoutingAlgorithm,
"Failed to parse RoutingAlgorithm=");
DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(batadv_routing_algorithm_kernel, BatadvRoutingAlgorithm);
int config_parse_badadv_bandwidth (
const char *unit,
const char *filename,
unsigned line,
const char *section,
unsigned section_line,
const char *lvalue,
int ltype,
const char *rvalue,
void *data,
void *userdata) {
uint64_t k;
uint32_t *bandwidth = data;
int r;
assert(filename);
assert(lvalue);
assert(rvalue);
r = parse_size(rvalue, 1000, &k);
if (r < 0) {
log_syntax(unit, LOG_WARNING, filename, line, r,
"Failed to parse '%s=', ignoring assignment: %s",
lvalue, rvalue);
return 0;
}
if (k/1000/100 > UINT32_MAX)
log_syntax(unit, LOG_WARNING, filename, line, 0,
"The value of '%s=', is outside of 0...429496729500000 range: %s",
lvalue, rvalue);
*bandwidth = k/1000/100;
return 0;
}
/* callback for batman netdev's parameter set */
static int netdev_batman_set_handler(sd_netlink *rtnl, sd_netlink_message *m, NetDev *netdev) {
int r;
assert(netdev);
assert(m);
r = sd_netlink_message_get_errno(m);
if (r < 0) {
log_netdev_warning_errno(netdev, r, "BATADV parameters could not be set: %m");
return 1;
}
log_netdev_debug(netdev, "BATADV parameters set success");
return 1;
}
static int netdev_batadv_post_create_message(NetDev *netdev, sd_netlink_message *message) {
BatmanAdvanced *b;
int r;
assert_se(b = BATADV(netdev));
r = sd_netlink_message_append_u32(message, BATADV_ATTR_MESH_IFINDEX, netdev->ifindex);
if (r < 0)
return r;
r = sd_netlink_message_append_u8(message, BATADV_ATTR_GW_MODE, b->gateway_mode);
if (r < 0)
return r;
r = sd_netlink_message_append_u8(message, BATADV_ATTR_AGGREGATED_OGMS_ENABLED, b->aggregation);
if (r < 0)
return r;
r = sd_netlink_message_append_u8(message, BATADV_ATTR_BRIDGE_LOOP_AVOIDANCE_ENABLED, b->bridge_loop_avoidance);
if (r < 0)
return r;
r = sd_netlink_message_append_u8(message, BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED, b->distributed_arp_table);
if (r < 0)
return r;
r = sd_netlink_message_append_u8(message, BATADV_ATTR_FRAGMENTATION_ENABLED, b->fragmentation);
if (r < 0)
return r;
r = sd_netlink_message_append_u8(message, BATADV_ATTR_HOP_PENALTY, b->hop_penalty);
if (r < 0)
return r;
r = sd_netlink_message_append_u32(message, BATADV_ATTR_ORIG_INTERVAL, DIV_ROUND_UP(b->originator_interval, USEC_PER_MSEC));
if (r < 0)
return r;
r = sd_netlink_message_append_u32(message, BATADV_ATTR_GW_BANDWIDTH_DOWN, b->gateway_bandwidth_down);
if (r < 0)
return r;
r = sd_netlink_message_append_u32(message, BATADV_ATTR_GW_BANDWIDTH_UP, b->gateway_bandwidth_up);
if (r < 0)
return r;
return 0;
}
static int netdev_batadv_post_create(NetDev *netdev, Link *link) {
_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *message = NULL;
int r;
assert(netdev);
r = sd_genl_message_new(netdev->manager->genl, BATADV_NL_NAME, BATADV_CMD_SET_MESH, &message);
if (r < 0)
return log_netdev_error_errno(netdev, r, "Could not allocate netlink message: %m");
r = netdev_batadv_post_create_message(netdev, message);
if (r < 0)
return log_netdev_error_errno(netdev, r, "Could not create netlink message: %m");
r = netlink_call_async(netdev->manager->genl, NULL, message, netdev_batman_set_handler,
netdev_destroy_callback, netdev);
if (r < 0)
return log_netdev_error_errno(netdev, r, "Could not send netlink message: %m");
netdev_ref(netdev);
return r;
}
static int netdev_batadv_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) {
BatmanAdvanced *b;
int r;
assert(netdev);
assert(m);
b = BATADV(netdev);
assert(b);
r = sd_netlink_message_append_string(m, IFLA_BATADV_ALGO_NAME, batadv_routing_algorithm_kernel_to_string(b->routing_algorithm));
if (r < 0)
return r;
return 0;
}
const NetDevVTable batadv_vtable = {
.object_size = sizeof(BatmanAdvanced),
.init = batadv_init,
.sections = NETDEV_COMMON_SECTIONS "BatmanAdvanced\0",
.fill_message_create = netdev_batadv_fill_message_create,
.post_create = netdev_batadv_post_create,
.create_type = NETDEV_CREATE_INDEPENDENT,
.iftype = ARPHRD_ETHER,
.generate_mac = true,
};
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