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09a6af17 MT |
1 | /*############################################################################# |
2 | # # | |
3 | # IPFire.org - A linux based firewall # | |
4 | # Copyright (C) 2023 IPFire Network Development Team # | |
5 | # # | |
6 | # This program is free software: you can redistribute it and/or modify # | |
7 | # it under the terms of the GNU General Public License as published by # | |
8 | # the Free Software Foundation, either version 3 of the License, or # | |
9 | # (at your option) any later version. # | |
10 | # # | |
11 | # This program is distributed in the hope that it will be useful, # | |
12 | # but WITHOUT ANY WARRANTY; without even the implied warranty of # | |
13 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # | |
14 | # GNU General Public License for more details. # | |
15 | # # | |
16 | # You should have received a copy of the GNU General Public License # | |
17 | # along with this program. If not, see <http://www.gnu.org/licenses/>. # | |
18 | # # | |
19 | #############################################################################*/ | |
20 | ||
21 | #include <stdlib.h> | |
09a6af17 MT |
22 | |
23 | #include <systemd/sd-bus.h> | |
24 | #include <systemd/sd-event.h> | |
25 | ||
26 | #include "bus.h" | |
27 | #include "daemon.h" | |
d6edaf63 | 28 | #include "daemon-bus.h" |
09a6af17 | 29 | #include "logging.h" |
9806a600 | 30 | |
bf42846c MT |
31 | static int nw_bus_on_connect(sd_bus_message* m, void* data, sd_bus_error* error) { |
32 | struct nw_daemon* daemon = (struct nw_daemon*)data; | |
33 | ||
34 | DEBUG("Connected to D-Bus\n"); | |
35 | ||
36 | return 0; | |
37 | } | |
38 | ||
eaeca0f9 | 39 | int nw_bus_connect(sd_bus* bus, sd_event* loop, struct nw_daemon* daemon) { |
09a6af17 MT |
40 | int r; |
41 | ||
42 | // Create a bus object | |
43 | r = sd_bus_new(&bus); | |
44 | if (r < 0) { | |
45 | ERROR("Could not allocate a bus object: %s\n", strerror(-r)); | |
46 | return 1; | |
47 | } | |
48 | ||
49 | // Set description | |
50 | r = sd_bus_set_description(bus, NETWORKD_BUS_DESCRIPTION); | |
51 | if (r < 0) { | |
52 | ERROR("Could not set bus description: %s\n", strerror(-r)); | |
53 | return 1; | |
54 | } | |
55 | ||
56 | const char* address = secure_getenv("DBUS_SYSTEM_BUS_ADDRESS"); | |
57 | if (!address) | |
58 | address = DEFAULT_SYSTEM_BUS_ADDRESS; | |
59 | ||
60 | // Set bus address | |
61 | r = sd_bus_set_address(bus, address); | |
62 | if (r < 0) { | |
63 | ERROR("Could not set bus address: %s\n", strerror(-r)); | |
64 | return 1; | |
65 | } | |
66 | ||
67 | // Set bus client | |
68 | r = sd_bus_set_bus_client(bus, 1); | |
69 | if (r < 0) { | |
70 | ERROR("Could not set bus client: %s\n", strerror(-r)); | |
71 | return 1; | |
72 | } | |
73 | ||
74 | // Request some credentials for all messages | |
75 | r = sd_bus_negotiate_creds(bus, 1, | |
76 | SD_BUS_CREDS_UID|SD_BUS_CREDS_EUID|SD_BUS_CREDS_EFFECTIVE_CAPS); | |
77 | if (r < 0) { | |
78 | ERROR("Could not negotiate creds: %s\n", strerror(-r)); | |
79 | return 1; | |
80 | } | |
81 | ||
82 | // Automatically bind when the socket is available | |
83 | r = sd_bus_set_watch_bind(bus, 1); | |
84 | if (r < 0) { | |
85 | ERROR("Could not watch socket: %s\n", strerror(-r)); | |
86 | return 1; | |
87 | } | |
88 | ||
89 | // Emit a connected signal when we are connected | |
90 | r = sd_bus_set_connected_signal(bus, 1); | |
91 | if (r < 0) { | |
92 | ERROR("Could not enable sending a connect signal: %s\n", strerror(-r)); | |
93 | return 1; | |
94 | } | |
95 | ||
96 | // Connect to the bus | |
97 | r = sd_bus_start(bus); | |
98 | if (r < 0) { | |
99 | ERROR("Could not connect to bus: %s\n", strerror(-r)); | |
100 | return 1; | |
101 | } | |
102 | ||
9806a600 | 103 | // Register the implementation |
d6edaf63 | 104 | r = nw_bus_register_implementation(bus, &daemon_bus_impl, daemon); |
9806a600 MT |
105 | if (r) |
106 | return r; | |
09a6af17 MT |
107 | |
108 | // Request interface name | |
9806a600 | 109 | r = sd_bus_request_name_async(bus, NULL, "org.ipfire.network1", 0, NULL, NULL); |
09a6af17 MT |
110 | if (r < 0) { |
111 | ERROR("Could not request bus name: %s\n", strerror(-r)); | |
112 | return 1; | |
113 | } | |
114 | ||
115 | // Attach the event loop | |
116 | r = sd_bus_attach_event(bus, loop, 0); | |
117 | if (r < 0) { | |
118 | ERROR("Could not attach bus to event loop: %s\n", strerror(-r)); | |
119 | return 1; | |
120 | } | |
121 | ||
bf42846c MT |
122 | // Request receiving a connect signal |
123 | r = sd_bus_match_signal_async(bus, NULL, "org.freedesktop.DBus.Local", | |
124 | NULL, "org.freedesktop.DBus.Local", "Connected", nw_bus_on_connect, NULL, NULL); | |
125 | if (r < 0) { | |
126 | ERROR("Could not request match on Connected signal: %s\n", strerror(-r)); | |
127 | return 1; | |
128 | } | |
129 | ||
09a6af17 MT |
130 | return 0; |
131 | } | |
9806a600 MT |
132 | |
133 | int nw_bus_register_implementation(sd_bus* bus, | |
134 | const struct nw_bus_implementation* impl, void* data) { | |
135 | int r; | |
136 | ||
137 | DEBUG("Registering bus object implementation for path=%s iface=%s\n", | |
138 | impl->path, impl->interface); | |
139 | ||
bd9ffd6a | 140 | // Register vtables |
9806a600 MT |
141 | for (const sd_bus_vtable** vtable = impl->vtables; vtable && *vtable; vtable++) { |
142 | r = sd_bus_add_object_vtable(bus, NULL, impl->path, impl->interface, *vtable, data); | |
143 | if (r < 0) { | |
144 | ERROR("Could not register bus path %s with interface %s: %m\n", | |
145 | impl->path, impl->interface); | |
146 | return 1; | |
147 | } | |
148 | } | |
149 | ||
bd9ffd6a MT |
150 | // Register fallback vtables |
151 | for (const struct nw_bus_vtable_pair* p = impl->fallback_vtables; p && p->vtable; p++) { | |
152 | r = sd_bus_add_fallback_vtable(bus, NULL, impl->path, impl->interface, | |
153 | p->vtable, p->object_find, data); | |
154 | if (r < 0) { | |
155 | ERROR("Could not register bus path %s with interface %s: %m\n", | |
156 | impl->path, impl->interface); | |
157 | return 1; | |
158 | } | |
159 | } | |
160 | ||
ebc65f19 MT |
161 | // Register the node enumerator |
162 | if (impl->node_enumerator) { | |
163 | r = sd_bus_add_node_enumerator(bus, NULL, impl->path, impl->node_enumerator, data); | |
164 | if (r < 0) { | |
165 | ERROR("Could not add the node enumerator for %s: %m\n", impl->path); | |
166 | return 1; | |
167 | } | |
168 | } | |
169 | ||
170 | // Register any child implementations | |
171 | for (int i = 0; impl->children && impl->children[i]; i++) { | |
172 | r = nw_bus_register_implementation(bus, impl->children[i], data); | |
173 | if (r) | |
174 | return r; | |
175 | } | |
176 | ||
9806a600 MT |
177 | return 0; |
178 | } |