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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-10 20:49:52 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-10 20:49:52 +0000 |
commit | 55944e5e40b1be2afc4855d8d2baf4b73d1876b5 (patch) | |
tree | 33f869f55a1b149e9b7c2b7e201867ca5dd52992 /src/network/networkd-address-label.c | |
parent | Initial commit. (diff) | |
download | systemd-55944e5e40b1be2afc4855d8d2baf4b73d1876b5.tar.xz systemd-55944e5e40b1be2afc4855d8d2baf4b73d1876b5.zip |
Adding upstream version 255.4.upstream/255.4
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/network/networkd-address-label.c')
-rw-r--r-- | src/network/networkd-address-label.c | 298 |
1 files changed, 298 insertions, 0 deletions
diff --git a/src/network/networkd-address-label.c b/src/network/networkd-address-label.c new file mode 100644 index 0000000..745b959 --- /dev/null +++ b/src/network/networkd-address-label.c @@ -0,0 +1,298 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ + +#include <net/if.h> +#include <linux/if_addrlabel.h> + +#include "alloc-util.h" +#include "netlink-util.h" +#include "networkd-address-label.h" +#include "networkd-link.h" +#include "networkd-manager.h" +#include "networkd-network.h" +#include "networkd-queue.h" +#include "parse-util.h" + +AddressLabel *address_label_free(AddressLabel *label) { + if (!label) + return NULL; + + if (label->network) { + assert(label->section); + hashmap_remove(label->network->address_labels_by_section, label->section); + } + + config_section_free(label->section); + return mfree(label); +} + +DEFINE_SECTION_CLEANUP_FUNCTIONS(AddressLabel, address_label_free); + +static int address_label_new_static(Network *network, const char *filename, unsigned section_line, AddressLabel **ret) { + _cleanup_(config_section_freep) ConfigSection *n = NULL; + _cleanup_(address_label_freep) AddressLabel *label = NULL; + int r; + + assert(network); + assert(ret); + assert(filename); + assert(section_line > 0); + + r = config_section_new(filename, section_line, &n); + if (r < 0) + return r; + + label = hashmap_get(network->address_labels_by_section, n); + if (label) { + *ret = TAKE_PTR(label); + return 0; + } + + label = new(AddressLabel, 1); + if (!label) + return -ENOMEM; + + *label = (AddressLabel) { + .network = network, + .section = TAKE_PTR(n), + .label = UINT32_MAX, + }; + + r = hashmap_ensure_put(&network->address_labels_by_section, &config_section_hash_ops, label->section, label); + if (r < 0) + return r; + + *ret = TAKE_PTR(label); + return 0; +} + +static int address_label_configure_handler( + sd_netlink *rtnl, + sd_netlink_message *m, + Request *req, + Link *link, + void *userdata) { + + int r; + + assert(m); + assert(link); + + r = sd_netlink_message_get_errno(m); + if (r < 0 && r != -EEXIST) { + log_link_message_warning_errno(link, m, r, "Could not set address label"); + link_enter_failed(link); + return 1; + } + + if (link->static_address_label_messages == 0) { + log_link_debug(link, "Addresses label set"); + link->static_address_labels_configured = true; + link_check_ready(link); + } + + return 1; +} + +static int address_label_configure(AddressLabel *label, Link *link, Request *req) { + _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL; + int r; + + assert(label); + assert(link); + assert(link->ifindex > 0); + assert(link->manager); + assert(link->manager->rtnl); + assert(req); + + r = sd_rtnl_message_new_addrlabel(link->manager->rtnl, &m, RTM_NEWADDRLABEL, + link->ifindex, AF_INET6); + if (r < 0) + return r; + + r = sd_rtnl_message_addrlabel_set_prefixlen(m, label->prefixlen); + if (r < 0) + return r; + + r = sd_netlink_message_append_u32(m, IFAL_LABEL, label->label); + if (r < 0) + return r; + + r = sd_netlink_message_append_in6_addr(m, IFA_ADDRESS, &label->prefix); + if (r < 0) + return r; + + return request_call_netlink_async(link->manager->rtnl, m, req); +} + +static int address_label_process_request(Request *req, Link *link, void *userdata) { + AddressLabel *label = ASSERT_PTR(userdata); + int r; + + assert(req); + assert(link); + + if (!link_is_ready_to_configure(link, false)) + return 0; + + r = address_label_configure(label, link, req); + if (r < 0) + return log_link_warning_errno(link, r, "Failed to configure address label: %m"); + + return 1; +} + +int link_request_static_address_labels(Link *link) { + AddressLabel *label; + int r; + + assert(link); + assert(link->network); + + link->static_address_labels_configured = false; + + HASHMAP_FOREACH(label, link->network->address_labels_by_section) { + r = link_queue_request_full(link, REQUEST_TYPE_ADDRESS_LABEL, + label, NULL, trivial_hash_func, trivial_compare_func, + address_label_process_request, + &link->static_address_label_messages, + address_label_configure_handler, NULL); + if (r < 0) + return log_link_warning_errno(link, r, "Failed to request address label: %m"); + } + + if (link->static_address_label_messages == 0) { + link->static_address_labels_configured = true; + link_check_ready(link); + } else { + log_link_debug(link, "Setting address labels."); + link_set_state(link, LINK_STATE_CONFIGURING); + } + + return 0; +} + +static int address_label_section_verify(AddressLabel *label) { + assert(label); + assert(label->section); + + if (section_is_invalid(label->section)) + return -EINVAL; + + if (!label->prefix_set) + return log_warning_errno(SYNTHETIC_ERRNO(EINVAL), + "%s: [IPv6AddressLabel] section without Prefix= setting specified. " + "Ignoring [IPv6AddressLabel] section from line %u.", + label->section->filename, label->section->line); + + if (label->label == UINT32_MAX) + return log_warning_errno(SYNTHETIC_ERRNO(EINVAL), + "%s: [IPv6AddressLabel] section without Label= setting specified. " + "Ignoring [IPv6AddressLabel] section from line %u.", + label->section->filename, label->section->line); + + return 0; +} + +void network_drop_invalid_address_labels(Network *network) { + AddressLabel *label; + + assert(network); + + HASHMAP_FOREACH(label, network->address_labels_by_section) + if (address_label_section_verify(label) < 0) + address_label_free(label); +} + +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_or_set_invalidp) AddressLabel *n = NULL; + Network *network = userdata; + unsigned char prefixlen; + union in_addr_union a; + 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 log_oom(); + + r = in_addr_prefix_from_string(rvalue, AF_INET6, &a, &prefixlen); + if (r < 0) { + log_syntax(unit, LOG_WARNING, filename, line, r, + "Invalid prefix for address label, ignoring assignment: %s", rvalue); + return 0; + } + if (in6_addr_is_ipv4_mapped_address(&a.in6) && prefixlen > 96) { + /* See ip6addrlbl_alloc() in net/ipv6/addrlabel.c of kernel. */ + log_syntax(unit, LOG_WARNING, filename, line, 0, + "The prefix length of IPv4 mapped address for address label must be equal to or smaller than 96, " + "ignoring assignment: %s", rvalue); + return 0; + } + + n->prefix = a.in6; + n->prefixlen = prefixlen; + n->prefix_set = true; + + TAKE_PTR(n); + 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_or_set_invalidp) 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 log_oom(); + + r = safe_atou32(rvalue, &k); + if (r < 0) { + log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse address label, ignoring: %s", rvalue); + return 0; + } + + if (k == UINT_MAX) { + log_syntax(unit, LOG_WARNING, filename, line, 0, "Address label is invalid, ignoring: %s", rvalue); + return 0; + } + + n->label = k; + TAKE_PTR(n); + + return 0; +} |