/* SPDX-License-Identifier: LGPL-2.1-or-later */ #include "sd-network.h" #include "alloc-util.h" #include "format-util.h" #include "hashmap.h" #include "link.h" #include "manager.h" #include "string-util.h" #include "strv.h" int link_new(Manager *m, Link **ret, int ifindex, const char *ifname) { _cleanup_(link_freep) Link *l = NULL; _cleanup_free_ char *n = NULL; int r; assert(m); assert(ifindex > 0); assert(ifname); n = strdup(ifname); if (!n) return -ENOMEM; l = new(Link, 1); if (!l) return -ENOMEM; *l = (Link) { .manager = m, .ifname = TAKE_PTR(n), .ifindex = ifindex, .required_operstate = LINK_OPERSTATE_RANGE_DEFAULT, }; r = hashmap_ensure_put(&m->links_by_index, NULL, INT_TO_PTR(ifindex), l); if (r < 0) return r; r = hashmap_ensure_put(&m->links_by_name, &string_hash_ops, l->ifname, l); if (r < 0) return r; if (ret) *ret = l; TAKE_PTR(l); return 0; } Link *link_free(Link *l) { if (!l) return NULL; if (l->manager) { hashmap_remove(l->manager->links_by_index, INT_TO_PTR(l->ifindex)); hashmap_remove(l->manager->links_by_name, l->ifname); STRV_FOREACH(n, l->altnames) hashmap_remove(l->manager->links_by_name, *n); } free(l->state); free(l->ifname); strv_free(l->altnames); return mfree(l); } static int link_update_name(Link *l, sd_netlink_message *m) { char ifname_from_index[IF_NAMESIZE]; const char *ifname; int r; assert(l); assert(l->manager); assert(m); r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname); if (r == -ENODATA) /* Hmm? But ok. */ return 0; if (r < 0) return r; if (streq(ifname, l->ifname)) return 0; /* The kernel sometimes sends wrong ifname change. Let's confirm the received name. */ r = format_ifname(l->ifindex, ifname_from_index); if (r < 0) return r; if (!streq(ifname, ifname_from_index)) { log_link_debug(l, "New interface name '%s' received from the kernel does not correspond " "with the name currently configured on the actual interface '%s'. Ignoring.", ifname, ifname_from_index); return 0; } hashmap_remove(l->manager->links_by_name, l->ifname); r = free_and_strdup(&l->ifname, ifname); if (r < 0) return r; r = hashmap_ensure_put(&l->manager->links_by_name, &string_hash_ops, l->ifname, l); if (r < 0) return r; return 0; } static int link_update_altnames(Link *l, sd_netlink_message *m) { _cleanup_strv_free_ char **altnames = NULL; int r; assert(l); assert(l->manager); assert(m); r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &altnames); if (r == -ENODATA) /* The message does not have IFLA_PROP_LIST container attribute. It does not mean the * interface has no alternative name. */ return 0; if (r < 0) return r; if (strv_equal(altnames, l->altnames)) return 0; STRV_FOREACH(n, l->altnames) hashmap_remove(l->manager->links_by_name, *n); strv_free_and_replace(l->altnames, altnames); STRV_FOREACH(n, l->altnames) { r = hashmap_ensure_put(&l->manager->links_by_name, &string_hash_ops, *n, l); if (r < 0) return r; } return 0; } int link_update_rtnl(Link *l, sd_netlink_message *m) { int r; assert(l); assert(l->manager); assert(m); r = sd_rtnl_message_link_get_flags(m, &l->flags); if (r < 0) return r; r = link_update_name(l, m); if (r < 0) return r; r = link_update_altnames(l, m); if (r < 0) return r; return 0; } int link_update_monitor(Link *l) { _cleanup_free_ char *required_operstate = NULL, *required_family = NULL, *ipv4_address_state = NULL, *ipv6_address_state = NULL, *state = NULL; int r, ret = 0; assert(l); assert(l->ifname); r = sd_network_link_get_required_for_online(l->ifindex); if (r < 0 && r != -ENODATA) ret = log_link_debug_errno(l, r, "Failed to determine whether the link is required for online or not, " "assuming required: %m"); l->required_for_online = r != 0; r = sd_network_link_get_required_operstate_for_online(l->ifindex, &required_operstate); if (r < 0 && r != -ENODATA) ret = log_link_debug_errno(l, r, "Failed to get required operational state, ignoring: %m"); if (isempty(required_operstate)) l->required_operstate = LINK_OPERSTATE_RANGE_DEFAULT; else { r = parse_operational_state_range(required_operstate, &l->required_operstate); if (r < 0) ret = log_link_debug_errno(l, SYNTHETIC_ERRNO(EINVAL), "Failed to parse required operational state, ignoring: %m"); } r = network_link_get_operational_state(l->ifindex, &l->operational_state); if (r < 0) ret = log_link_debug_errno(l, r, "Failed to get operational state, ignoring: %m"); r = sd_network_link_get_required_family_for_online(l->ifindex, &required_family); if (r < 0 && r != -ENODATA) ret = log_link_debug_errno(l, r, "Failed to get required address family, ignoring: %m"); if (isempty(required_family)) l->required_family = ADDRESS_FAMILY_NO; else { AddressFamily f; f = link_required_address_family_from_string(required_family); if (f < 0) ret = log_link_debug_errno(l, f, "Failed to parse required address family, ignoring: %m"); else l->required_family = f; } r = sd_network_link_get_ipv4_address_state(l->ifindex, &ipv4_address_state); if (r < 0) ret = log_link_debug_errno(l, r, "Failed to get IPv4 address state, ignoring: %m"); else { LinkAddressState s; s = link_address_state_from_string(ipv4_address_state); if (s < 0) ret = log_link_debug_errno(l, s, "Failed to parse IPv4 address state, ignoring: %m"); else l->ipv4_address_state = s; } r = sd_network_link_get_ipv6_address_state(l->ifindex, &ipv6_address_state); if (r < 0) ret = log_link_debug_errno(l, r, "Failed to get IPv6 address state, ignoring: %m"); else { LinkAddressState s; s = link_address_state_from_string(ipv6_address_state); if (s < 0) ret = log_link_debug_errno(l, s, "Failed to parse IPv6 address state, ignoring: %m"); else l->ipv6_address_state = s; } r = sd_network_link_get_setup_state(l->ifindex, &state); if (r < 0) ret = log_link_debug_errno(l, r, "Failed to get setup state, ignoring: %m"); else free_and_replace(l->state, state); return ret; }