#include <ctype.h>

#include <net/if.h>

#include "networkd.h"

#include "networkd-netdev.h"

#include "networkd-link.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_fd(fileno(file))) {

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->stacked_netdevs = hashmap_new(&string_hash_ops);

if (!network->stacked_netdevs)

return log_oom();

network->addresses_by_section = hashmap_new(NULL);

if (!network->addresses_by_section)

return log_oom();

network->routes_by_section = hashmap_new(NULL);

if (!network->routes_by_section)

return log_oom();

network->filename = strdup(filename);

if (!network->filename)

return log_oom();

network->dhcp = DHCP_SUPPORT_NONE;

network->dhcp_ntp = true;

network->dhcp_dns = true;

network->dhcp_hostname = true;

network->dhcp_routes = true;

network->dhcp_sendhost = true;

network->dhcp_route_metric = DHCP_ROUTE_METRIC;

network->llmnr = LLMNR_SUPPORT_YES;

r = config_parse(NULL, filename, file,

"Match\0"

"Link\0"

"Network\0"

"Address\0"

"Route\0"

"DHCP\0"

"DHCPv4\0"

"BridgePort\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)

return log_error_errno(r, "Failed to enumerate network files: %m");

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);

free(network->mac);

strv_free(network->ntp);

strv_free(network->dns);

strv_free(network->domains);

netdev_unref(network->bridge);

netdev_unref(network->bond);

HASHMAP_FOREACH(netdev, network->stacked_netdevs, i) {

hashmap_remove(network->stacked_netdevs, netdev->ifname);

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)) {

const char *attr;

uint8_t name_assign_type = NET_NAME_UNKNOWN;

if (network->match_name) {

attr = udev_device_get_sysattr_value(device, "name_assign_type");

if (attr)

(void)safe_atou8(attr, &name_assign_type);

if (name_assign_type == NET_NAME_ENUM)

log_warning("%-*s: found matching network '%s', based on potentially unstable ifname",

IFNAMSIZ, ifname, network->filename);

else

log_debug("%-*s: found matching network '%s'", IFNAMSIZ, ifname, network->filename);

} else

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_domains(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;

char ***domains = data;

char **domain;

int r;

r = config_parse_strv(unit, filename, line, section, section_line,

lvalue, ltype, rvalue, domains, userdata);

if (r < 0)

return r;

strv_uniq(*domains);

network->wildcard_domain = !!strv_find(*domains, "*");

STRV_FOREACH(domain, *domains) {

if (is_localhost(*domain))

log_syntax(unit, LOG_ERR, filename, line, EINVAL, "'localhost' domain names may not be configured, ignoring assignment: %s", *domain);

else if (!hostname_is_valid(*domain)) {

if (!streq(*domain, "*"))

log_syntax(unit, LOG_ERR, filename, line, EINVAL, "domain name is not valid, ignoring assignment: %s", *domain);

} else

continue;

strv_remove(*domains, *domain);

/* We removed one entry, make sure we don't skip the next one */

domain--;

}

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

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

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;

}