Line data Source code
1 : /*
2 : * wpa_supplicant - D-Bus introspection
3 : * Copyright (c) 2006, Dan Williams <dcbw@redhat.com> and Red Hat, Inc.
4 : * Copyright (c) 2009, Witold Sowa <witold.sowa@gmail.com>
5 : * Copyright (c) 2010, Jouni Malinen <j@w1.fi>
6 : *
7 : * This software may be distributed under the terms of the BSD license.
8 : * See README for more details.
9 : */
10 :
11 : #include "utils/includes.h"
12 :
13 : #include "utils/common.h"
14 : #include "utils/list.h"
15 : #include "utils/wpabuf.h"
16 : #include "dbus_common_i.h"
17 : #include "dbus_new_helpers.h"
18 :
19 :
20 : struct interfaces {
21 : struct dl_list list;
22 : char *dbus_interface;
23 : struct wpabuf *xml;
24 : };
25 :
26 :
27 8190 : static struct interfaces * add_interface(struct dl_list *list,
28 : const char *dbus_interface)
29 : {
30 : struct interfaces *iface;
31 :
32 14742 : dl_list_for_each(iface, list, struct interfaces, list) {
33 14471 : if (os_strcmp(iface->dbus_interface, dbus_interface) == 0)
34 7919 : return iface; /* already in the list */
35 : }
36 :
37 271 : iface = os_zalloc(sizeof(struct interfaces));
38 271 : if (!iface)
39 1 : return NULL;
40 270 : iface->dbus_interface = os_strdup(dbus_interface);
41 270 : iface->xml = wpabuf_alloc(6000);
42 270 : if (iface->dbus_interface == NULL || iface->xml == NULL) {
43 2 : os_free(iface->dbus_interface);
44 2 : wpabuf_free(iface->xml);
45 2 : os_free(iface);
46 2 : return NULL;
47 : }
48 268 : wpabuf_printf(iface->xml, "<interface name=\"%s\">", dbus_interface);
49 268 : dl_list_add_tail(list, &iface->list);
50 268 : return iface;
51 : }
52 :
53 :
54 7721 : static void add_arg(struct wpabuf *xml, const char *name, const char *type,
55 : const char *direction)
56 : {
57 7721 : wpabuf_printf(xml, "<arg name=\"%s\"", name);
58 7721 : if (type)
59 7721 : wpabuf_printf(xml, " type=\"%s\"", type);
60 7721 : if (direction)
61 4316 : wpabuf_printf(xml, " direction=\"%s\"", direction);
62 7721 : wpabuf_put_str(xml, "/>");
63 7721 : }
64 :
65 :
66 5784 : static void add_entry(struct wpabuf *xml, const char *type, const char *name,
67 : const struct wpa_dbus_argument *args, int include_dir)
68 : {
69 : const struct wpa_dbus_argument *arg;
70 :
71 5784 : if (args == NULL || args->name == NULL) {
72 882 : wpabuf_printf(xml, "<%s name=\"%s\"/>", type, name);
73 6666 : return;
74 : }
75 4902 : wpabuf_printf(xml, "<%s name=\"%s\">", type, name);
76 11487 : for (arg = args; arg && arg->name; arg++) {
77 9765 : add_arg(xml, arg->name, arg->type,
78 3180 : include_dir ? (arg->dir == ARG_IN ? "in" : "out") :
79 : NULL);
80 : }
81 4902 : wpabuf_printf(xml, "</%s>", type);
82 : }
83 :
84 :
85 2403 : static void add_property(struct wpabuf *xml,
86 : const struct wpa_dbus_property_desc *dsc)
87 : {
88 4806 : wpabuf_printf(xml, "<property name=\"%s\" type=\"%s\" "
89 : "access=\"%s%s\"/>",
90 : dsc->dbus_property, dsc->type,
91 2403 : dsc->getter ? "read" : "",
92 2403 : dsc->setter ? "write" : "");
93 2403 : }
94 :
95 :
96 142 : static void extract_interfaces_methods(
97 : struct dl_list *list, const struct wpa_dbus_method_desc *methods)
98 : {
99 : const struct wpa_dbus_method_desc *dsc;
100 : struct interfaces *iface;
101 :
102 3337 : for (dsc = methods; dsc && dsc->dbus_method; dsc++) {
103 3195 : iface = add_interface(list, dsc->dbus_interface);
104 3195 : if (iface)
105 3192 : add_entry(iface->xml, "method", dsc->dbus_method,
106 3192 : dsc->args, 1);
107 : }
108 142 : }
109 :
110 :
111 142 : static void extract_interfaces_signals(
112 : struct dl_list *list, const struct wpa_dbus_signal_desc *signals)
113 : {
114 : const struct wpa_dbus_signal_desc *dsc;
115 : struct interfaces *iface;
116 :
117 2734 : for (dsc = signals; dsc && dsc->dbus_signal; dsc++) {
118 2592 : iface = add_interface(list, dsc->dbus_interface);
119 2592 : if (iface)
120 2592 : add_entry(iface->xml, "signal", dsc->dbus_signal,
121 2592 : dsc->args, 0);
122 : }
123 142 : }
124 :
125 :
126 142 : static void extract_interfaces_properties(
127 : struct dl_list *list, const struct wpa_dbus_property_desc *properties)
128 : {
129 : const struct wpa_dbus_property_desc *dsc;
130 : struct interfaces *iface;
131 :
132 2545 : for (dsc = properties; dsc && dsc->dbus_property; dsc++) {
133 2403 : iface = add_interface(list, dsc->dbus_interface);
134 2403 : if (iface)
135 2403 : add_property(iface->xml, dsc);
136 : }
137 142 : }
138 :
139 :
140 : /**
141 : * extract_interfaces - Extract interfaces from methods, signals and props
142 : * @list: Interface list to be filled
143 : * @obj_dsc: Description of object from which interfaces will be extracted
144 : *
145 : * Iterates over all methods, signals, and properties registered with an
146 : * object and collects all declared DBus interfaces and create interfaces'
147 : * node in XML root node for each. Returned list elements contain interface
148 : * name and XML node of corresponding interface.
149 : */
150 142 : static void extract_interfaces(struct dl_list *list,
151 : struct wpa_dbus_object_desc *obj_dsc)
152 : {
153 142 : extract_interfaces_methods(list, obj_dsc->methods);
154 142 : extract_interfaces_signals(list, obj_dsc->signals);
155 142 : extract_interfaces_properties(list, obj_dsc->properties);
156 142 : }
157 :
158 :
159 142 : static void add_interfaces(struct dl_list *list, struct wpabuf *xml)
160 : {
161 : struct interfaces *iface, *n;
162 :
163 410 : dl_list_for_each_safe(iface, n, list, struct interfaces, list) {
164 268 : if (wpabuf_len(iface->xml) + 20 < wpabuf_tailroom(xml)) {
165 268 : wpabuf_put_buf(xml, iface->xml);
166 268 : wpabuf_put_str(xml, "</interface>");
167 : } else {
168 0 : wpa_printf(MSG_DEBUG,
169 : "dbus: Not enough room for add_interfaces inspect data: tailroom %u, add %u",
170 0 : (unsigned int) wpabuf_tailroom(xml),
171 0 : (unsigned int) wpabuf_len(iface->xml));
172 : }
173 268 : dl_list_del(&iface->list);
174 268 : wpabuf_free(iface->xml);
175 268 : os_free(iface->dbus_interface);
176 268 : os_free(iface);
177 : }
178 142 : }
179 :
180 :
181 142 : static void add_child_nodes(struct wpabuf *xml, DBusConnection *con,
182 : const char *path)
183 : {
184 : char **children;
185 : int i;
186 :
187 : /* add child nodes to introspection tree */
188 142 : dbus_connection_list_registered(con, path, &children);
189 507 : for (i = 0; children[i]; i++)
190 365 : wpabuf_printf(xml, "<node name=\"%s\"/>", children[i]);
191 142 : dbus_free_string_array(children);
192 142 : }
193 :
194 :
195 142 : static void add_introspectable_interface(struct wpabuf *xml)
196 : {
197 142 : wpabuf_printf(xml, "<interface name=\"%s\">"
198 : "<method name=\"%s\">"
199 : "<arg name=\"data\" type=\"s\" direction=\"out\"/>"
200 : "</method>"
201 : "</interface>",
202 : WPA_DBUS_INTROSPECTION_INTERFACE,
203 : WPA_DBUS_INTROSPECTION_METHOD);
204 142 : }
205 :
206 :
207 142 : static void add_properties_interface(struct wpabuf *xml)
208 : {
209 142 : wpabuf_printf(xml, "<interface name=\"%s\">",
210 : WPA_DBUS_PROPERTIES_INTERFACE);
211 :
212 142 : wpabuf_printf(xml, "<method name=\"%s\">", WPA_DBUS_PROPERTIES_GET);
213 142 : add_arg(xml, "interface", "s", "in");
214 142 : add_arg(xml, "propname", "s", "in");
215 142 : add_arg(xml, "value", "v", "out");
216 142 : wpabuf_put_str(xml, "</method>");
217 :
218 142 : wpabuf_printf(xml, "<method name=\"%s\">", WPA_DBUS_PROPERTIES_GETALL);
219 142 : add_arg(xml, "interface", "s", "in");
220 142 : add_arg(xml, "props", "a{sv}", "out");
221 142 : wpabuf_put_str(xml, "</method>");
222 :
223 142 : wpabuf_printf(xml, "<method name=\"%s\">", WPA_DBUS_PROPERTIES_SET);
224 142 : add_arg(xml, "interface", "s", "in");
225 142 : add_arg(xml, "propname", "s", "in");
226 142 : add_arg(xml, "value", "v", "in");
227 142 : wpabuf_put_str(xml, "</method>");
228 :
229 142 : wpabuf_put_str(xml, "</interface>");
230 142 : }
231 :
232 :
233 142 : static void add_wpas_interfaces(struct wpabuf *xml,
234 : struct wpa_dbus_object_desc *obj_dsc)
235 : {
236 : struct dl_list ifaces;
237 :
238 142 : dl_list_init(&ifaces);
239 142 : extract_interfaces(&ifaces, obj_dsc);
240 142 : add_interfaces(&ifaces, xml);
241 142 : }
242 :
243 :
244 : /**
245 : * wpa_dbus_introspect - Responds for Introspect calls on object
246 : * @message: Message with Introspect call
247 : * @obj_dsc: Object description on which Introspect was called
248 : * Returns: Message with introspection result XML string as only argument
249 : *
250 : * Iterates over all methods, signals and properties registered with
251 : * object and generates introspection data for the object as XML string.
252 : */
253 143 : DBusMessage * wpa_dbus_introspect(DBusMessage *message,
254 : struct wpa_dbus_object_desc *obj_dsc)
255 : {
256 :
257 : DBusMessage *reply;
258 : struct wpabuf *xml;
259 :
260 143 : xml = wpabuf_alloc(10000);
261 143 : if (xml == NULL)
262 1 : return NULL;
263 :
264 142 : wpabuf_put_str(xml, "<?xml version=\"1.0\"?>\n");
265 142 : wpabuf_put_str(xml, DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE);
266 142 : wpabuf_put_str(xml, "<node>");
267 :
268 142 : add_introspectable_interface(xml);
269 142 : add_properties_interface(xml);
270 142 : add_wpas_interfaces(xml, obj_dsc);
271 142 : add_child_nodes(xml, obj_dsc->connection,
272 : dbus_message_get_path(message));
273 :
274 142 : wpabuf_put_str(xml, "</node>\n");
275 :
276 142 : reply = dbus_message_new_method_return(message);
277 142 : if (reply) {
278 142 : const char *intro_str = wpabuf_head(xml);
279 :
280 142 : dbus_message_append_args(reply, DBUS_TYPE_STRING, &intro_str,
281 : DBUS_TYPE_INVALID);
282 : }
283 142 : wpabuf_free(xml);
284 :
285 142 : return reply;
286 : }
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