258 lines
7.7 KiB
C
258 lines
7.7 KiB
C
/***
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This file is part of systemd.
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Copyright 2017 Susant Sahani
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <net/if.h>
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#include <linux/if_addrlabel.h>
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#include "alloc-util.h"
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#include "conf-parser.h"
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#include "networkd-address-label.h"
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#include "netlink-util.h"
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#include "networkd-manager.h"
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#include "parse-util.h"
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#include "socket-util.h"
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int address_label_new(AddressLabel **ret) {
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_cleanup_address_label_free_ AddressLabel *addrlabel = NULL;
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addrlabel = new0(AddressLabel, 1);
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if (!addrlabel)
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return -ENOMEM;
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*ret = addrlabel;
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addrlabel = NULL;
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return 0;
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}
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void address_label_free(AddressLabel *label) {
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if (!label)
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return;
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if (label->network) {
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LIST_REMOVE(labels, label->network->address_labels, label);
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assert(label->network->n_address_labels > 0);
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label->network->n_address_labels--;
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if (label->section) {
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hashmap_remove(label->network->address_labels_by_section, label->section);
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network_config_section_free(label->section);
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}
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}
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free(label);
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}
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static int address_label_new_static(Network *network, const char *filename, unsigned section_line, AddressLabel **ret) {
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_cleanup_network_config_section_free_ NetworkConfigSection *n = NULL;
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_cleanup_address_label_free_ AddressLabel *label = NULL;
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int r;
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assert(network);
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assert(ret);
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assert(!!filename == (section_line > 0));
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r = network_config_section_new(filename, section_line, &n);
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if (r < 0)
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return r;
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label = hashmap_get(network->address_labels_by_section, n);
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if (label) {
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*ret = label;
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label = NULL;
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return 0;
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}
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r = address_label_new(&label);
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if (r < 0)
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return r;
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label->section = n;
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n = NULL;
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r = hashmap_put(network->address_labels_by_section, label->section, label);
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if (r < 0)
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return r;
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label->network = network;
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LIST_APPEND(labels, network->address_labels, label);
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network->n_address_labels++;
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*ret = label;
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label = NULL;
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return 0;
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}
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int address_label_configure(
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AddressLabel *label,
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Link *link,
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sd_netlink_message_handler_t callback,
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bool update) {
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_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
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int r;
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assert(label);
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assert(link);
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assert(link->ifindex > 0);
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assert(link->manager);
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assert(link->manager->rtnl);
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r = sd_rtnl_message_new_addrlabel(link->manager->rtnl, &req, RTM_NEWADDRLABEL,
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link->ifindex, label->family);
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if (r < 0)
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return log_error_errno(r, "Could not allocate RTM_NEWADDR message: %m");
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r = sd_rtnl_message_addrlabel_set_prefixlen(req, label->prefixlen);
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if (r < 0)
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return log_error_errno(r, "Could not set prefixlen: %m");
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r = sd_netlink_message_append_u32(req, IFAL_LABEL, label->label);
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if (r < 0)
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return log_error_errno(r, "Could not append IFAL_LABEL attribute: %m");
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r = sd_netlink_message_append_in6_addr(req, IFA_ADDRESS, &label->in_addr.in6);
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if (r < 0)
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return log_error_errno(r, "Could not append IFA_ADDRESS attribute: %m");
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r = sd_netlink_call_async(link->manager->rtnl, req, callback, link, 0, NULL);
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if (r < 0)
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return log_error_errno(r, "Could not send rtnetlink message: %m");
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link_ref(link);
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return 0;
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}
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int config_parse_address_label_prefix(const char *unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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_cleanup_address_label_free_ AddressLabel *n = NULL;
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Network *network = userdata;
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const char *prefix, *e;
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union in_addr_union buffer;
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int r, f;
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assert(filename);
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assert(section);
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assert(lvalue);
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assert(rvalue);
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assert(data);
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r = address_label_new_static(network, filename, section_line, &n);
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if (r < 0)
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return r;
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/* AddressLabel=prefix/prefixlen */
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/* prefixlen */
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e = strchr(rvalue, '/');
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if (e) {
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unsigned i;
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r = safe_atou(e + 1, &i);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, r, "Prefix length is invalid, ignoring assignment: %s", e + 1);
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return 0;
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}
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if (i > 128) {
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log_syntax(unit, LOG_ERR, filename, line, r, "Prefix length is out of range, ignoring assignment: %s", e + 1);
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return 0;
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}
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n->prefixlen = (unsigned char) i;
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prefix = strndupa(rvalue, e - rvalue);
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} else
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prefix = rvalue;
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r = in_addr_from_string_auto(prefix, &f, &buffer);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, r, "Address label is invalid, ignoring assignment: %s", prefix);
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return 0;
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}
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if (f != AF_INET6) {
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log_syntax(unit, LOG_ERR, filename, line, 0, "Address label family is not IPv6, ignoring assignment: %s", prefix);
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return 0;
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}
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n->family = f;
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n->in_addr = buffer;
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n = NULL;
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return 0;
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}
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int config_parse_address_label(
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const char *unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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_cleanup_address_label_free_ AddressLabel *n = NULL;
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Network *network = userdata;
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uint32_t k;
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int r;
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assert(filename);
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assert(section);
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assert(lvalue);
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assert(rvalue);
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assert(data);
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r = address_label_new_static(network, filename, section_line, &n);
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if (r < 0)
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return r;
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r = safe_atou32(rvalue, &k);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse address label, ignoring: %s", rvalue);
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return 0;
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}
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if (k == 0xffffffffUL) {
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log_syntax(unit, LOG_ERR, filename, line, r, "Adress label is invalid, ignoring: %s", rvalue);
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return 0;
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}
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n->label = k;
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n = NULL;
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return 0;
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}
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