networkd-network.c revision e9f3d2d508bfd9fb5b54e82994bda365a71eb864
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2013 Tom Gundersen <teg@jklm.no>
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <ctype.h>
#include <net/if.h>
#include "networkd.h"
#include "networkd-netdev.h"
#include "network-internal.h"
#include "path-util.h"
#include "conf-files.h"
#include "conf-parser.h"
#include "util.h"
static int network_load_one(Manager *manager, const char *filename) {
_cleanup_network_free_ Network *network = NULL;
_cleanup_fclose_ FILE *file = NULL;
Route *route;
Address *address;
int r;
assert(manager);
assert(filename);
file = fopen(filename, "re");
if (!file) {
if (errno == ENOENT)
return 0;
else
return -errno;
}
if (null_or_empty_path(filename)) {
log_debug("skipping empty file: %s", filename);
return 0;
}
network = new0(Network, 1);
if (!network)
return log_oom();
network->manager = manager;
LIST_HEAD_INIT(network->static_addresses);
LIST_HEAD_INIT(network->static_routes);
network->vlans = hashmap_new(string_hash_func, string_compare_func);
if (!network->vlans)
return log_oom();
network->macvlans = hashmap_new(uint64_hash_func, uint64_compare_func);
if (!network->macvlans)
return log_oom();
network->vxlans = hashmap_new(uint64_hash_func, uint64_compare_func);
if (!network->vxlans)
return log_oom();
network->addresses_by_section = hashmap_new(uint64_hash_func, uint64_compare_func);
if (!network->addresses_by_section)
return log_oom();
network->routes_by_section = hashmap_new(uint64_hash_func, uint64_compare_func);
if (!network->routes_by_section)
return log_oom();
network->filename = strdup(filename);
if (!network->filename)
return log_oom();
network->dhcp_ntp = true;
network->dhcp_dns = true;
network->dhcp_hostname = true;
network->dhcp_domainname = true;
network->dhcp_routes = true;
network->dhcp_sendhost = true;
r = config_parse(NULL, filename, file,
"Match\0Network\0Address\0Route\0DHCP\0DHCPv4\0",
config_item_perf_lookup, network_network_gperf_lookup,
false, false, network);
if (r < 0) {
log_warning("Could not parse config file %s: %s", filename, strerror(-r));
return r;
}
LIST_PREPEND(networks, manager->networks, network);
LIST_FOREACH(routes, route, network->static_routes) {
if (!route->family) {
log_warning("Route section without Gateway field configured in %s. "
"Ignoring", filename);
return 0;
}
}
LIST_FOREACH(addresses, address, network->static_addresses) {
if (!address->family) {
log_warning("Address section without Address field configured in %s. "
"Ignoring", filename);
return 0;
}
}
network = NULL;
return 0;
}
int network_load(Manager *manager) {
Network *network;
_cleanup_strv_free_ char **files = NULL;
char **f;
int r;
assert(manager);
while ((network = manager->networks))
network_free(network);
r = conf_files_list_strv(&files, ".network", NULL, network_dirs);
if (r < 0) {
log_error("Failed to enumerate network files: %s", strerror(-r));
return r;
}
STRV_FOREACH_BACKWARDS(f, files) {
r = network_load_one(manager, *f);
if (r < 0)
return r;
}
return 0;
}
void network_free(Network *network) {
NetDev *netdev;
Route *route;
Address *address;
Iterator i;
if (!network)
return;
free(network->filename);
free(network->match_mac);
free(network->match_path);
free(network->match_driver);
free(network->match_type);
free(network->match_name);
free(network->description);
free(network->dhcp_vendor_class_identifier);
while ((address = network->ntp)) {
LIST_REMOVE(addresses, network->ntp, address);
address_free(address);
}
while ((address = network->dns)) {
LIST_REMOVE(addresses, network->dns, address);
address_free(address);
}
netdev_unref(network->bridge);
netdev_unref(network->bond);
netdev_unref(network->tunnel);
HASHMAP_FOREACH(netdev, network->vlans, i)
netdev_unref(netdev);
hashmap_free(network->vlans);
HASHMAP_FOREACH(netdev, network->macvlans, i)
netdev_unref(netdev);
hashmap_free(network->macvlans);
HASHMAP_FOREACH(netdev, network->vxlans, i)
netdev_unref(netdev);
hashmap_free(network->vxlans);
while ((route = network->static_routes))
route_free(route);
while ((address = network->static_addresses))
address_free(address);
hashmap_free(network->addresses_by_section);
hashmap_free(network->routes_by_section);
if (network->manager && network->manager->networks)
LIST_REMOVE(networks, network->manager->networks, network);
condition_free_list(network->match_host);
condition_free_list(network->match_virt);
condition_free_list(network->match_kernel);
condition_free_list(network->match_arch);
free(network);
}
int network_get(Manager *manager, struct udev_device *device,
const char *ifname, const struct ether_addr *address,
Network **ret) {
Network *network;
assert(manager);
assert(ret);
LIST_FOREACH(networks, network, manager->networks) {
if (net_match_config(network->match_mac, network->match_path,
network->match_driver, network->match_type,
network->match_name, network->match_host,
network->match_virt, network->match_kernel,
network->match_arch,
address,
udev_device_get_property_value(device, "ID_PATH"),
udev_device_get_driver(udev_device_get_parent(device)),
udev_device_get_property_value(device, "ID_NET_DRIVER"),
udev_device_get_devtype(device),
ifname)) {
log_debug("%-*s: found matching network '%s'", IFNAMSIZ, ifname,
network->filename);
*ret = network;
return 0;
}
}
*ret = NULL;
return -ENOENT;
}
int network_apply(Manager *manager, Network *network, Link *link) {
int r;
link->network = network;
if (network->dns || network->ntp) {
r = link_save(link);
if (r < 0)
return r;
}
return 0;
}
int config_parse_netdev(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) {
Network *network = userdata;
_cleanup_free_ char *kind_string = NULL;
char *p;
NetDev *netdev;
NetDevKind kind;
int r;
assert(filename);
assert(lvalue);
assert(rvalue);
assert(data);
kind_string = strdup(lvalue);
if (!kind_string)
return log_oom();
/* the keys are CamelCase versions of the kind */
for (p = kind_string; *p; p++)
*p = tolower(*p);
kind = netdev_kind_from_string(kind_string);
if (kind == _NETDEV_KIND_INVALID) {
log_syntax(unit, LOG_ERR, filename, line, EINVAL,
"Invalid NetDev kind: %s", lvalue);
return 0;
}
r = netdev_get(network->manager, rvalue, &netdev);
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, EINVAL,
"%s could not be found, ignoring assignment: %s", lvalue, rvalue);
return 0;
}
if (netdev->kind != kind) {
log_syntax(unit, LOG_ERR, filename, line, EINVAL,
"NetDev is not a %s, ignoring assignment: %s", lvalue, rvalue);
return 0;
}
switch (kind) {
case NETDEV_KIND_BRIDGE:
network->bridge = netdev;
break;
case NETDEV_KIND_BOND:
network->bond = netdev;
break;
case NETDEV_KIND_VLAN:
r = hashmap_put(network->vlans, &netdev->vlanid, netdev);
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, EINVAL,
"Can not add VLAN to network: %s", rvalue);
return 0;
}
break;
case NETDEV_KIND_MACVLAN:
r = hashmap_put(network->macvlans, netdev->ifname, netdev);
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, EINVAL,
"Can not add MACVLAN to network: %s", rvalue);
return 0;
}
break;
case NETDEV_KIND_VXLAN:
r = hashmap_put(network->vxlans, netdev->ifname, netdev);
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, EINVAL,
"Can not add VXLAN to network: %s", rvalue);
return 0;
}
break;
default:
assert_not_reached("Can not parse NetDev");
}
netdev_ref(netdev);
return 0;
}
int config_parse_tunnel(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) {
Network *network = userdata;
NetDev *netdev;
int r;
assert(filename);
assert(lvalue);
assert(rvalue);
assert(data);
r = netdev_get(network->manager, rvalue, &netdev);
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, EINVAL,
"Tunnel is invalid, ignoring assignment: %s", rvalue);
return 0;
}
if (netdev->kind != NETDEV_KIND_IPIP &&
netdev->kind != NETDEV_KIND_SIT &&
netdev->kind != NETDEV_KIND_GRE &&
netdev->kind != NETDEV_KIND_VTI) {
log_syntax(unit, LOG_ERR, filename, line, EINVAL,
"NetDev is not a tunnel, ignoring assignment: %s", rvalue);
return 0;
}
network->tunnel = netdev;
return 0;
}