diff options
Diffstat (limited to 'src/network/networkd-address-label.c')
| -rw-r--r-- | src/network/networkd-address-label.c | 242 |
1 files changed, 242 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..f933a1d --- /dev/null +++ b/src/network/networkd-address-label.c @@ -0,0 +1,242 @@ +/* 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 "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); + } + + network_config_section_free(label->section); + return mfree(label); +} + +DEFINE_NETWORK_SECTION_FUNCTIONS(AddressLabel, address_label_free); + +static int address_label_new_static(Network *network, const char *filename, unsigned section_line, AddressLabel **ret) { + _cleanup_(network_config_section_freep) NetworkConfigSection *n = NULL; + _cleanup_(address_label_freep) AddressLabel *label = NULL; + int r; + + assert(network); + assert(ret); + assert(filename); + assert(section_line > 0); + + r = network_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), + }; + + r = hashmap_ensure_allocated(&network->address_labels_by_section, &network_config_hash_ops); + if (r < 0) + return r; + + r = hashmap_put(network->address_labels_by_section, label->section, label); + if (r < 0) + return r; + + *ret = TAKE_PTR(label); + return 0; +} + +static int address_label_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { + int r; + + assert(rtnl); + assert(m); + assert(link); + assert(link->ifname); + assert(link->address_label_messages > 0); + + link->address_label_messages--; + + if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) + return 1; + + 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; + } else if (r >= 0) + (void) manager_rtnl_process_address(rtnl, m, link->manager); + + if (link->address_label_messages == 0) + log_link_debug(link, "Addresses label set"); + + return 1; +} + +static int address_label_configure(AddressLabel *label, Link *link) { + _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; + int r; + + assert(label); + assert(link); + assert(link->ifindex > 0); + assert(link->manager); + assert(link->manager->rtnl); + + r = sd_rtnl_message_new_addrlabel(link->manager->rtnl, &req, RTM_NEWADDRLABEL, + link->ifindex, AF_INET6); + if (r < 0) + return log_link_error_errno(link, r, "Could not allocate RTM_NEWADDR message: %m"); + + r = sd_rtnl_message_addrlabel_set_prefixlen(req, label->prefixlen); + if (r < 0) + return log_link_error_errno(link, r, "Could not set prefixlen: %m"); + + r = sd_netlink_message_append_u32(req, IFAL_LABEL, label->label); + if (r < 0) + return log_link_error_errno(link, r, "Could not append IFAL_LABEL attribute: %m"); + + r = sd_netlink_message_append_in6_addr(req, IFA_ADDRESS, &label->in_addr.in6); + if (r < 0) + return log_link_error_errno(link, r, "Could not append IFA_ADDRESS attribute: %m"); + + r = netlink_call_async(link->manager->rtnl, NULL, req, + address_label_handler, + link_netlink_destroy_callback, link); + if (r < 0) + return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); + + link_ref(link); + + return 0; +} + +int link_set_address_labels(Link *link) { + AddressLabel *label; + int r; + + assert(link); + assert(link->network); + + HASHMAP_FOREACH(label, link->network->address_labels_by_section) { + r = address_label_configure(label, link); + if (r < 0) + return log_link_warning_errno(link, r, "Could not set address label: %m"); + + link->address_label_messages++; + } + + return 0; +} + +void network_drop_invalid_address_labels(Network *network) { + AddressLabel *label; + + assert(network); + + HASHMAP_FOREACH(label, network->address_labels_by_section) + if (section_is_invalid(label->section)) + 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; + 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, &n->in_addr, &n->prefixlen); + if (r < 0) { + log_syntax(unit, LOG_WARNING, filename, line, r, "Address label is invalid, ignoring assignment: %s", rvalue); + return 0; + } + + n = NULL; + + 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 == 0xffffffffUL) { + log_syntax(unit, LOG_WARNING, filename, line, 0, "Address label is invalid, ignoring: %s", rvalue); + return 0; + } + + n->label = k; + n = NULL; + + return 0; +} |