232 lines
7.1 KiB
C
232 lines
7.1 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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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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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_freep) NetworkConfigSection *n = NULL;
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_cleanup_(address_label_freep) 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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if (filename) {
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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 = TAKE_PTR(label);
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return 0;
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}
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}
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label = new(AddressLabel, 1);
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if (!label)
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return -ENOMEM;
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*label = (AddressLabel) {
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.network = network,
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};
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LIST_APPEND(labels, network->address_labels, label);
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network->n_address_labels++;
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if (filename) {
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label->section = TAKE_PTR(n);
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r = hashmap_ensure_allocated(&network->address_labels_by_section, &network_config_hash_ops);
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if (r < 0)
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return r;
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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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}
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*ret = TAKE_PTR(label);
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return 0;
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}
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static int address_label_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
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int r;
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assert(rtnl);
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assert(m);
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assert(link);
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assert(link->ifname);
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assert(link->address_label_messages > 0);
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link->address_label_messages--;
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if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
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return 1;
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r = sd_netlink_message_get_errno(m);
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if (r < 0 && r != -EEXIST) {
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log_link_message_warning_errno(link, m, r, "Could not set address label");
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link_enter_failed(link);
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return 1;
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} else if (r >= 0)
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(void) manager_rtnl_process_address(rtnl, m, link->manager);
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if (link->address_label_messages == 0)
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log_link_debug(link, "Addresses label set");
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return 1;
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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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link_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, AF_INET6);
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if (r < 0)
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return log_link_error_errno(link, 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_link_error_errno(link, 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_link_error_errno(link, 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_link_error_errno(link, r, "Could not append IFA_ADDRESS attribute: %m");
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r = netlink_call_async(link->manager->rtnl, NULL, req,
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callback ?: address_label_handler,
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link_netlink_destroy_callback, link);
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if (r < 0)
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return log_link_error_errno(link, 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_or_set_invalidp) AddressLabel *n = NULL;
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Network *network = userdata;
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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 = in_addr_prefix_from_string(rvalue, AF_INET6, &n->in_addr, &n->prefixlen);
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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", rvalue);
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return 0;
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}
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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_or_set_invalidp) 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, "Address 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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