| /* 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; |
| } |