networkd-network.c revision bd8f65387673e29f46136a4ed172097035002c23
2521N/A/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
2521N/A
2521N/A/***
2521N/A This file is part of systemd.
2521N/A
2521N/A Copyright 2013 Tom Gundersen <teg@jklm.no>
2521N/A
2521N/A systemd is free software; you can redistribute it and/or modify it
2521N/A under the terms of the GNU Lesser General Public License as published by
2521N/A the Free Software Foundation; either version 2.1 of the License, or
2521N/A (at your option) any later version.
2521N/A
2521N/A systemd is distributed in the hope that it will be useful, but
2521N/A WITHOUT ANY WARRANTY; without even the implied warranty of
2521N/A MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
2521N/A Lesser General Public License for more details.
2521N/A
2521N/A You should have received a copy of the GNU Lesser General Public License
2521N/A along with systemd; If not, see <http://www.gnu.org/licenses/>.
2521N/A***/
2521N/A
2521N/A#include <ctype.h>
3817N/A#include <net/if.h>
2521N/A
3998N/A#include "networkd.h"
2521N/A#include "networkd-netdev.h"
2521N/A#include "network-internal.h"
2521N/A#include "path-util.h"
3998N/A#include "conf-files.h"
2521N/A#include "conf-parser.h"
3998N/A#include "util.h"
2521N/A
4194N/Astatic int network_load_one(Manager *manager, const char *filename) {
3817N/A _cleanup_network_free_ Network *network = NULL;
2521N/A _cleanup_fclose_ FILE *file = NULL;
2521N/A Route *route;
2521N/A Address *address;
4285N/A int r;
4285N/A
4285N/A assert(manager);
2521N/A assert(filename);
2521N/A
2521N/A file = fopen(filename, "re");
2521N/A if (!file) {
2521N/A if (errno == ENOENT)
4285N/A return 0;
4285N/A else
4285N/A return -errno;
2521N/A }
2521N/A
2521N/A if (null_or_empty_fd(fileno(file))) {
2521N/A log_debug("Skipping empty file: %s", filename);
2521N/A return 0;
2521N/A }
2521N/A
2521N/A network = new0(Network, 1);
2521N/A if (!network)
2521N/A return log_oom();
network->manager = manager;
LIST_HEAD_INIT(network->static_addresses);
LIST_HEAD_INIT(network->static_routes);
network->stacked_netdevs = hashmap_new(string_hash_func, string_compare_func);
if (!network->stacked_netdevs)
return log_oom();
network->addresses_by_section = hashmap_new(NULL, NULL);
if (!network->addresses_by_section)
return log_oom();
network->routes_by_section = hashmap_new(NULL, NULL);
if (!network->routes_by_section)
return log_oom();
network->filename = strdup(filename);
if (!network->filename)
return log_oom();
network->ipv4ll_route = true;
network->dhcp = DHCP_SUPPORT_NONE;
network->dhcp_ntp = true;
network->dhcp_dns = true;
network->dhcp_hostname = true;
network->dhcp_domainname = true;
network->dhcp_routes = true;
network->dhcp_sendhost = true;
network->llmnr = LLMNR_SUPPORT_YES;
r = config_parse(NULL, filename, file,
"Match\0Network\0Address\0Route\0DHCP\0DHCPv4\0",
config_item_perf_lookup, network_network_gperf_lookup,
false, false, true, network);
if (r < 0)
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);
strv_free(network->ntp);
strv_free(network->dns);
netdev_unref(network->bridge);
netdev_unref(network->bond);
HASHMAP_FOREACH(netdev, network->stacked_netdevs, i)
netdev_unref(netdev);
hashmap_free(network->stacked_netdevs);
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->ipv4ll_route) {
Route *route;
r = route_new_static(network, 0, &route);
if (r < 0)
return r;
r = inet_pton(AF_INET, "169.254.0.0", &route->dst_addr.in);
if (r == 0)
return -EINVAL;
if (r < 0)
return -errno;
route->family = AF_INET;
route->dst_prefixlen = 16;
route->scope = RT_SCOPE_LINK;
route->metrics = IPV4LL_ROUTE_METRIC;
route->protocol = RTPROT_STATIC;
}
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:
case NETDEV_KIND_MACVLAN:
case NETDEV_KIND_VXLAN:
r = hashmap_put(network->stacked_netdevs, netdev->ifname, netdev);
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, EINVAL,
"Can not add VLAN '%s' to network: %s",
rvalue, strerror(-r));
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;
}
r = hashmap_put(network->stacked_netdevs, netdev->ifname, netdev);
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, EINVAL,
"Can not add VLAN '%s' to network: %s",
rvalue, strerror(-r));
return 0;
}
netdev_ref(netdev);
return 0;
}
static const char* const dhcp_support_table[_DHCP_SUPPORT_MAX] = {
[DHCP_SUPPORT_NONE] = "none",
[DHCP_SUPPORT_BOTH] = "both",
[DHCP_SUPPORT_V4] = "v4",
[DHCP_SUPPORT_V6] = "v6",
};
DEFINE_STRING_TABLE_LOOKUP(dhcp_support, DHCPSupport);
int config_parse_dhcp(
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) {
DHCPSupport *dhcp = data;
int k;
assert(filename);
assert(lvalue);
assert(rvalue);
assert(data);
/* Our enum shall be a superset of booleans, hence first try
* to parse as boolean, and then as enum */
k = parse_boolean(rvalue);
if (k > 0)
*dhcp = DHCP_SUPPORT_BOTH;
else if (k == 0)
*dhcp = DHCP_SUPPORT_NONE;
else {
DHCPSupport s;
s = dhcp_support_from_string(rvalue);
if (s < 0){
log_syntax(unit, LOG_ERR, filename, line, -s, "Failed to parse DHCP option, ignoring: %s", rvalue);
return 0;
}
*dhcp = s;
}
return 0;
}
static const char* const llmnr_support_table[_LLMNR_SUPPORT_MAX] = {
[LLMNR_SUPPORT_NO] = "no",
[LLMNR_SUPPORT_YES] = "yes",
[LLMNR_SUPPORT_RESOLVE] = "resolve",
};
DEFINE_STRING_TABLE_LOOKUP(llmnr_support, LLMNRSupport);
int config_parse_llmnr(
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) {
LLMNRSupport *llmnr = data;
int k;
assert(filename);
assert(lvalue);
assert(rvalue);
assert(data);
/* Our enum shall be a superset of booleans, hence first try
* to parse as boolean, and then as enum */
k = parse_boolean(rvalue);
if (k > 0)
*llmnr = LLMNR_SUPPORT_YES;
else if (k == 0)
*llmnr = LLMNR_SUPPORT_NO;
else {
LLMNRSupport s;
s = llmnr_support_from_string(rvalue);
if (s < 0){
log_syntax(unit, LOG_ERR, filename, line, -s, "Failed to parse LLMNR option, ignoring: %s", rvalue);
return 0;
}
*llmnr = s;
}
return 0;
}