1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
2
3 #include "alloc-util.h"
4 #include "bus-common-errors.h"
5 #include "bus-util.h"
6 #include "dhcp-server-internal.h"
7 #include "networkd-dhcp-server-bus.h"
8 #include "networkd-link-bus.h"
9 #include "networkd-manager.h"
10 #include "strv.h"
11
property_get_leases(sd_bus * bus,const char * path,const char * interface,const char * property,sd_bus_message * reply,void * userdata,sd_bus_error * error)12 static int property_get_leases(
13 sd_bus *bus,
14 const char *path,
15 const char *interface,
16 const char *property,
17 sd_bus_message *reply,
18 void *userdata,
19 sd_bus_error *error) {
20 Link *l = userdata;
21 sd_dhcp_server *s;
22 DHCPLease *lease;
23 int r;
24
25 assert(reply);
26 assert(l);
27
28 s = l->dhcp_server;
29 if (!s)
30 return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Link %s has no DHCP server.", l->ifname);
31
32 if (sd_dhcp_server_is_in_relay_mode(s))
33 return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Link %s has DHCP relay agent active.", l->ifname);
34
35 r = sd_bus_message_open_container(reply, 'a', "(uayayayayt)");
36 if (r < 0)
37 return r;
38
39 HASHMAP_FOREACH(lease, s->bound_leases_by_client_id) {
40 r = sd_bus_message_open_container(reply, 'r', "uayayayayt");
41 if (r < 0)
42 return r;
43
44 r = sd_bus_message_append(reply, "u", (uint32_t)AF_INET);
45 if (r < 0)
46 return r;
47
48 r = sd_bus_message_append_array(reply, 'y', lease->client_id.data, lease->client_id.length);
49 if (r < 0)
50 return r;
51
52 r = sd_bus_message_append_array(reply, 'y', &lease->address, sizeof(lease->address));
53 if (r < 0)
54 return r;
55
56 r = sd_bus_message_append_array(reply, 'y', &lease->gateway, sizeof(lease->gateway));
57 if (r < 0)
58 return r;
59
60 r = sd_bus_message_append_array(reply, 'y', &lease->chaddr, sizeof(lease->chaddr));
61 if (r < 0)
62 return r;
63
64 r = sd_bus_message_append_basic(reply, 't', &lease->expiration);
65 if (r < 0)
66 return r;
67
68 r = sd_bus_message_close_container(reply);
69 if (r < 0)
70 return r;
71 }
72
73 return sd_bus_message_close_container(reply);
74 }
75
dhcp_server_emit_changed(Link * link,const char * property,...)76 static int dhcp_server_emit_changed(Link *link, const char *property, ...) {
77 _cleanup_free_ char *path = NULL;
78 char **l;
79
80 assert(link);
81
82 if (sd_bus_is_ready(link->manager->bus) <= 0)
83 return 0;
84
85 path = link_bus_path(link);
86 if (!path)
87 return log_oom();
88
89 l = strv_from_stdarg_alloca(property);
90
91 return sd_bus_emit_properties_changed_strv(
92 link->manager->bus,
93 path,
94 "org.freedesktop.network1.DHCPServer",
95 l);
96 }
97
dhcp_server_callback(sd_dhcp_server * s,uint64_t event,void * data)98 void dhcp_server_callback(sd_dhcp_server *s, uint64_t event, void *data) {
99 Link *l = data;
100
101 assert(l);
102
103 if (event & SD_DHCP_SERVER_EVENT_LEASE_CHANGED)
104 (void) dhcp_server_emit_changed(l, "Leases", NULL);
105 }
106
107 static const sd_bus_vtable dhcp_server_vtable[] = {
108 SD_BUS_VTABLE_START(0),
109
110 SD_BUS_PROPERTY("Leases", "a(uayayayayt)", property_get_leases, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
111
112 SD_BUS_VTABLE_END
113 };
114
115 const BusObjectImplementation dhcp_server_object = {
116 "/org/freedesktop/network1/link",
117 "org.freedesktop.network1.DHCPServer",
118 .fallback_vtables = BUS_FALLBACK_VTABLES({dhcp_server_vtable, link_object_find}),
119 .node_enumerator = link_node_enumerator,
120 };
121