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/***
This file is part of systemd.
Copyright 2017 Susant Sahani
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 <net/if.h>
#include <linux/if_addrlabel.h>
#include "alloc-util.h"
#include "conf-parser.h"
#include "networkd-address-label.h"
#include "netlink-util.h"
#include "networkd-manager.h"
#include "parse-util.h"
#include "socket-util.h"
int address_label_new(AddressLabel **ret) {
_cleanup_address_label_free_ AddressLabel *addrlabel = NULL;
addrlabel = new0(AddressLabel, 1);
if (!addrlabel)
return -ENOMEM;
*ret = addrlabel;
addrlabel = NULL;
return 0;
}
void address_label_free(AddressLabel *label) {
if (!label)
return;
if (label->network) {
LIST_REMOVE(labels, label->network->address_labels, label);
assert(label->network->n_address_labels > 0);
label->network->n_address_labels--;
if (label->section) {
hashmap_remove(label->network->address_labels_by_section, label->section);
network_config_section_free(label->section);
}
}
free(label);
}
static int address_label_new_static(Network *network, const char *filename, unsigned section_line, AddressLabel **ret) {
_cleanup_network_config_section_free_ NetworkConfigSection *n = NULL;
_cleanup_address_label_free_ AddressLabel *label = NULL;
int r;
assert(network);
assert(ret);
assert(!!filename == (section_line > 0));
r = network_config_section_new(filename, section_line, &n);
if (r < 0)
return r;
label = hashmap_get(network->address_labels_by_section, n);
if (label) {
*ret = label;
label = NULL;
return 0;
}
r = address_label_new(&label);
if (r < 0)
return r;
label->section = n;
n = NULL;
r = hashmap_put(network->address_labels_by_section, label->section, label);
if (r < 0)
return r;
label->network = network;
LIST_APPEND(labels, network->address_labels, label);
network->n_address_labels++;
*ret = label;
label = NULL;
return 0;
}
int address_label_configure(
AddressLabel *label,
Link *link,
sd_netlink_message_handler_t callback,
bool update) {
_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
int r;
assert(label);
assert(link);
assert(link->ifindex > 0);
assert(link->manager);
assert(link->manager->rtnl);
r = sd_rtnl_message_new_addrlabel(link->manager->rtnl, &req, RTM_NEWADDRLABEL,
link->ifindex, AF_INET6);
if (r < 0)
return log_error_errno(r, "Could not allocate RTM_NEWADDR message: %m");
r = sd_rtnl_message_addrlabel_set_prefixlen(req, label->prefixlen);
if (r < 0)
return log_error_errno(r, "Could not set prefixlen: %m");
r = sd_netlink_message_append_u32(req, IFAL_LABEL, label->label);
if (r < 0)
return log_error_errno(r, "Could not append IFAL_LABEL attribute: %m");
r = sd_netlink_message_append_in6_addr(req, IFA_ADDRESS, &label->in_addr.in6);
if (r < 0)
return log_error_errno(r, "Could not append IFA_ADDRESS attribute: %m");
r = sd_netlink_call_async(link->manager->rtnl, req, callback, link, 0, NULL);
if (r < 0)
return log_error_errno(r, "Could not send rtnetlink message: %m");
link_ref(link);
return 0;
}
int config_parse_address_label_prefix(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) {
_cleanup_address_label_free_ AddressLabel *n = NULL;
Network *network = userdata;
int r;
assert(filename);
assert(section);
assert(lvalue);
assert(rvalue);
assert(data);
r = address_label_new_static(network, filename, section_line, &n);
if (r < 0)
return r;
r = in_addr_prefix_from_string(rvalue, AF_INET6, &n->in_addr, &n->prefixlen);
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, r, "Address label is invalid, ignoring assignment: %s", rvalue);
return 0;
}
n = NULL;
return 0;
}
int config_parse_address_label(
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) {
_cleanup_address_label_free_ AddressLabel *n = NULL;
Network *network = userdata;
uint32_t k;
int r;
assert(filename);
assert(section);
assert(lvalue);
assert(rvalue);
assert(data);
r = address_label_new_static(network, filename, section_line, &n);
if (r < 0)
return r;
r = safe_atou32(rvalue, &k);
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse address label, ignoring: %s", rvalue);
return 0;
}
if (k == 0xffffffffUL) {
log_syntax(unit, LOG_ERR, filename, line, r, "Adress label is invalid, ignoring: %s", rvalue);
return 0;
}
n->label = k;
n = NULL;
return 0;
}
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