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c5c74d85 LP |
1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
2 | ||
3 | #include <unistd.h> | |
4 | ||
5 | #include "networkd-manager-varlink.h" | |
6 | #include "varlink.h" | |
7 | #include "varlink-io.systemd.Network.h" | |
8 | ||
9 | static int vl_method_get_states(Varlink *link, JsonVariant *parameters, VarlinkMethodFlags flags, void *userdata) { | |
10 | Manager *m = ASSERT_PTR(userdata); | |
11 | ||
12 | assert(link); | |
13 | ||
14 | if (json_variant_elements(parameters) > 0) | |
15 | return varlink_error_invalid_parameter(link, parameters); | |
16 | ||
17 | return varlink_replyb(link, | |
18 | JSON_BUILD_OBJECT( | |
19 | JSON_BUILD_PAIR_STRING("AddressState", link_address_state_to_string(m->address_state)), | |
20 | JSON_BUILD_PAIR_STRING("IPv4AddressState", link_address_state_to_string(m->ipv4_address_state)), | |
21 | JSON_BUILD_PAIR_STRING("IPv6AddressState", link_address_state_to_string(m->ipv6_address_state)), | |
22 | JSON_BUILD_PAIR_STRING("CarrierState", link_carrier_state_to_string(m->carrier_state)), | |
23 | JSON_BUILD_PAIR_CONDITION(m->online_state >= 0, "OnlineState", JSON_BUILD_STRING(link_online_state_to_string(m->online_state))), | |
24 | JSON_BUILD_PAIR_STRING("OperationalState", link_operstate_to_string(m->operational_state)))); | |
25 | } | |
26 | ||
27 | static int vl_method_get_namespace_id(Varlink *link, JsonVariant *parameters, VarlinkMethodFlags flags, void *userdata) { | |
91b34c76 LP |
28 | uint64_t inode = 0; |
29 | uint32_t nsid = UINT32_MAX; | |
30 | int r; | |
c5c74d85 LP |
31 | |
32 | assert(link); | |
33 | ||
34 | if (json_variant_elements(parameters) > 0) | |
35 | return varlink_error_invalid_parameter(link, parameters); | |
36 | ||
91b34c76 LP |
37 | /* Network namespaces have two identifiers: the inode number (which all namespace types have), and |
38 | * the "nsid" (aka the "cookie"), which only network namespaces know as a concept, and which is not | |
39 | * assigned by default, but once it is, is fixed. Let's return both, to avoid any confusion which one | |
40 | * this is. */ | |
41 | ||
c5c74d85 | 42 | struct stat st; |
91b34c76 | 43 | if (stat("/proc/self/ns/net", &st) < 0) |
c5c74d85 | 44 | log_warning_errno(errno, "Failed to stat network namespace, ignoring: %m"); |
91b34c76 LP |
45 | else |
46 | inode = st.st_ino; | |
47 | ||
48 | r = netns_get_nsid(/* netnsfd= */ -EBADF, &nsid); | |
49 | if (r < 0) | |
50 | log_warning_errno(r, "Failed to query network nsid, ignoring: %m"); | |
c5c74d85 LP |
51 | |
52 | return varlink_replyb(link, | |
53 | JSON_BUILD_OBJECT( | |
91b34c76 LP |
54 | JSON_BUILD_PAIR_UNSIGNED("NamespaceId", inode), |
55 | JSON_BUILD_PAIR_CONDITION(nsid == UINT32_MAX, "NamespaceNSID", JSON_BUILD_NULL), | |
56 | JSON_BUILD_PAIR_CONDITION(nsid != UINT32_MAX, "NamespaceNSID", JSON_BUILD_UNSIGNED(nsid)))); | |
c5c74d85 LP |
57 | } |
58 | ||
59 | int manager_connect_varlink(Manager *m) { | |
60 | _cleanup_(varlink_server_unrefp) VarlinkServer *s = NULL; | |
61 | int r; | |
62 | ||
63 | assert(m); | |
64 | ||
65 | if (m->varlink_server) | |
66 | return 0; | |
67 | ||
68 | r = varlink_server_new(&s, VARLINK_SERVER_ACCOUNT_UID|VARLINK_SERVER_INHERIT_USERDATA); | |
69 | if (r < 0) | |
70 | return log_error_errno(r, "Failed to allocate varlink server object: %m"); | |
71 | ||
72 | varlink_server_set_userdata(s, m); | |
73 | ||
74 | r = varlink_server_add_interface(s, &vl_interface_io_systemd_Network); | |
75 | if (r < 0) | |
76 | return log_error_errno(r, "Failed to add Network interface to varlink server: %m"); | |
77 | ||
78 | r = varlink_server_bind_method_many( | |
79 | s, | |
80 | "io.systemd.Network.GetStates", vl_method_get_states, | |
81 | "io.systemd.Network.GetNamespaceId", vl_method_get_namespace_id); | |
82 | if (r < 0) | |
83 | return log_error_errno(r, "Failed to register varlink methods: %m"); | |
84 | ||
85 | r = varlink_server_listen_address(s, "/run/systemd/netif/io.systemd.Network", 0666); | |
86 | if (r < 0) | |
87 | return log_error_errno(r, "Failed to bind to varlink socket: %m"); | |
88 | ||
89 | r = varlink_server_attach_event(s, m->event, SD_EVENT_PRIORITY_NORMAL); | |
90 | if (r < 0) | |
91 | return log_error_errno(r, "Failed to attach varlink connection to event loop: %m"); | |
92 | ||
93 | m->varlink_server = TAKE_PTR(s); | |
94 | return 0; | |
95 | } | |
96 | ||
97 | void manager_varlink_done(Manager *m) { | |
98 | assert(m); | |
99 | ||
100 | m->varlink_server = varlink_server_unref(m->varlink_server); | |
101 | (void) unlink("/run/systemd/netif/io.systemd.Network"); | |
102 | } |