133 lines
4.8 KiB
C
133 lines
4.8 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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#include "sd-netlink.h"
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#include "missing-network.h"
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#include "netlink-util.h"
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#include "networkd-address.h"
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#include "networkd-link.h"
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#include "networkd-manager.h"
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#include "networkd-netlabel.h"
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static int netlabel_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
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int r;
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assert_se(rtnl);
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assert_se(m);
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assert_se(link);
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r = sd_netlink_message_get_errno(m);
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if (r < 0) {
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log_link_message_warning_errno(link, m, r, "NetLabel operation failed, ignoring");
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return 1;
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}
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log_link_debug(link, "NetLabel operation successful");
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return 1;
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}
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static int netlabel_command(uint16_t command, const char *label, const Address *address) {
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_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
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int r;
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assert(command != NLBL_UNLABEL_C_UNSPEC && command < __NLBL_UNLABEL_C_MAX);
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assert(address);
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assert(address->link);
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assert(address->link->ifname);
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assert(address->link->manager);
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assert(address->link->manager->genl);
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assert(IN_SET(address->family, AF_INET, AF_INET6));
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if (address->link->manager->state == MANAGER_STOPPED)
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return 0; /* We cannot call link_ref() below. */
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r = sd_genl_message_new(address->link->manager->genl, NETLBL_NLTYPE_UNLABELED_NAME, command, &m);
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if (r < 0)
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return r;
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r = sd_netlink_message_append_string(m, NLBL_UNLABEL_A_IFACE, address->link->ifname);
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if (r < 0)
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return r;
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if (command == NLBL_UNLABEL_C_STATICADD) {
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assert(label);
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r = sd_netlink_message_append_string(m, NLBL_UNLABEL_A_SECCTX, label);
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if (r < 0)
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return r;
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}
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union in_addr_union netmask, masked_addr;
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r = in_addr_prefixlen_to_netmask(address->family, &netmask, address->prefixlen);
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if (r < 0)
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return r;
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/*
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* When adding rules, kernel adds the address to its hash table _applying also the netmask_, but on
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* removal, an exact match is required _without netmask applied_, so apply the mask on both
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* operations.
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*/
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masked_addr = address->in_addr;
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r = in_addr_mask(address->family, &masked_addr, address->prefixlen);
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if (r < 0)
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return r;
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if (address->family == AF_INET) {
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r = sd_netlink_message_append_in_addr(m, NLBL_UNLABEL_A_IPV4ADDR, &masked_addr.in);
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if (r < 0)
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return r;
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r = sd_netlink_message_append_in_addr(m, NLBL_UNLABEL_A_IPV4MASK, &netmask.in);
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} else if (address->family == AF_INET6) {
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r = sd_netlink_message_append_in6_addr(m, NLBL_UNLABEL_A_IPV6ADDR, &masked_addr.in6);
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if (r < 0)
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return r;
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r = sd_netlink_message_append_in6_addr(m, NLBL_UNLABEL_A_IPV6MASK, &netmask.in6);
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}
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if (r < 0)
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return r;
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r = netlink_call_async(address->link->manager->genl, NULL, m, netlabel_handler, link_netlink_destroy_callback,
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address->link);
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if (r < 0)
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return r;
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link_ref(address->link);
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return 0;
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}
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void address_add_netlabel(const Address *address) {
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int r;
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assert(address);
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if (!address->netlabel)
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return;
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r = netlabel_command(NLBL_UNLABEL_C_STATICADD, address->netlabel, address);
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if (r < 0)
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log_link_warning_errno(address->link, r, "Adding NetLabel %s for IP address %s failed, ignoring", address->netlabel,
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IN_ADDR_PREFIX_TO_STRING(address->family, &address->in_addr, address->prefixlen));
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else
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log_link_debug(address->link, "Adding NetLabel %s for IP address %s", address->netlabel,
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IN_ADDR_PREFIX_TO_STRING(address->family, &address->in_addr, address->prefixlen));
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}
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void address_del_netlabel(const Address *address) {
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int r;
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assert(address);
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if (!address->netlabel)
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return;
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r = netlabel_command(NLBL_UNLABEL_C_STATICREMOVE, address->netlabel, address);
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if (r < 0)
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log_link_warning_errno(address->link, r, "Deleting NetLabel %s for IP address %s failed, ignoring", address->netlabel,
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IN_ADDR_PREFIX_TO_STRING(address->family, &address->in_addr, address->prefixlen));
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else
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log_link_debug(address->link, "Deleting NetLabel %s for IP address %s", address->netlabel,
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IN_ADDR_PREFIX_TO_STRING(address->family, &address->in_addr, address->prefixlen));
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}
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