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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 15:35:18 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 15:35:18 +0000 |
commit | b750101eb236130cf056c675997decbac904cc49 (patch) | |
tree | a5df1a06754bdd014cb975c051c83b01c9a97532 /src/network/networkd-netlabel.c | |
parent | Initial commit. (diff) | |
download | systemd-upstream.tar.xz systemd-upstream.zip |
Adding upstream version 252.22.upstream/252.22upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/network/networkd-netlabel.c | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/src/network/networkd-netlabel.c b/src/network/networkd-netlabel.c new file mode 100644 index 0000000..94bf8f5 --- /dev/null +++ b/src/network/networkd-netlabel.c @@ -0,0 +1,128 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ + +#include "escape.h" +#include "netlink-util.h" +#include "networkd-address.h" +#include "networkd-link.h" +#include "networkd-manager.h" +#include "networkd-netlabel.h" +#include "networkd-network.h" + +static int netlabel_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { + int r; + + assert_se(rtnl); + assert_se(m); + assert_se(link); + + r = sd_netlink_message_get_errno(m); + if (r < 0) { + log_link_message_warning_errno(link, m, r, "NetLabel operation failed, ignoring"); + return 1; + } + + log_link_debug(link, "NetLabel operation successful"); + + return 1; +} + +static int netlabel_command(uint16_t command, const char *label, const Address *address) { + _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL; + int r; + + assert(command != NLBL_UNLABEL_C_UNSPEC && command < __NLBL_UNLABEL_C_MAX); + assert(address); + assert(address->link); + assert(address->link->ifname); + assert(address->link->manager); + assert(address->link->manager->genl); + assert(IN_SET(address->family, AF_INET, AF_INET6)); + + r = sd_genl_message_new(address->link->manager->genl, NETLBL_NLTYPE_UNLABELED_NAME, command, &m); + if (r < 0) + return r; + + r = sd_netlink_message_append_string(m, NLBL_UNLABEL_A_IFACE, address->link->ifname); + if (r < 0) + return r; + + if (command == NLBL_UNLABEL_C_STATICADD) { + assert(label); + r = sd_netlink_message_append_string(m, NLBL_UNLABEL_A_SECCTX, label); + if (r < 0) + return r; + } + + union in_addr_union netmask, masked_addr; + r = in_addr_prefixlen_to_netmask(address->family, &netmask, address->prefixlen); + if (r < 0) + return r; + + /* + * When adding rules, kernel adds the address to its hash table _applying also the netmask_, but on + * removal, an exact match is required _without netmask applied_, so apply the mask on both + * operations. + */ + masked_addr = address->in_addr; + r = in_addr_mask(address->family, &masked_addr, address->prefixlen); + if (r < 0) + return r; + + if (address->family == AF_INET) { + r = sd_netlink_message_append_in_addr(m, NLBL_UNLABEL_A_IPV4ADDR, &masked_addr.in); + if (r < 0) + return r; + + r = sd_netlink_message_append_in_addr(m, NLBL_UNLABEL_A_IPV4MASK, &netmask.in); + } else if (address->family == AF_INET6) { + r = sd_netlink_message_append_in6_addr(m, NLBL_UNLABEL_A_IPV6ADDR, &masked_addr.in6); + if (r < 0) + return r; + + r = sd_netlink_message_append_in6_addr(m, NLBL_UNLABEL_A_IPV6MASK, &netmask.in6); + } + if (r < 0) + return r; + + r = netlink_call_async(address->link->manager->genl, NULL, m, netlabel_handler, link_netlink_destroy_callback, + address->link); + if (r < 0) + return r; + + link_ref(address->link); + return 0; +} + +void address_add_netlabel(const Address *address) { + int r; + + assert(address); + + if (!address->netlabel) + return; + + r = netlabel_command(NLBL_UNLABEL_C_STATICADD, address->netlabel, address); + if (r < 0) + log_link_warning_errno(address->link, r, "Adding NetLabel %s for IP address %s failed, ignoring", address->netlabel, + IN_ADDR_PREFIX_TO_STRING(address->family, &address->in_addr, address->prefixlen)); + else + log_link_debug(address->link, "Adding NetLabel %s for IP address %s", address->netlabel, + IN_ADDR_PREFIX_TO_STRING(address->family, &address->in_addr, address->prefixlen)); +} + +void address_del_netlabel(const Address *address) { + int r; + + assert(address); + + if (!address->netlabel) + return; + + r = netlabel_command(NLBL_UNLABEL_C_STATICREMOVE, address->netlabel, address); + if (r < 0) + log_link_warning_errno(address->link, r, "Deleting NetLabel %s for IP address %s failed, ignoring", address->netlabel, + IN_ADDR_PREFIX_TO_STRING(address->family, &address->in_addr, address->prefixlen)); + else + log_link_debug(address->link, "Deleting NetLabel %s for IP address %s", address->netlabel, + IN_ADDR_PREFIX_TO_STRING(address->family, &address->in_addr, address->prefixlen)); +} |