2 * Copyright (C) 2014 John Crispin <blogic@openwrt.org>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU Lesser General Public License version 2.1
6 * as published by the Free Software Foundation
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
14 #include <sys/types.h>
15 #include <arpa/inet.h>
20 #include <libubox/vlist.h>
21 #include <libubox/uloop.h>
27 #include "interface.h"
29 static struct ubus_auto_conn conn;
30 static struct blob_buf b;
33 mdns_reload(struct ubus_context *ctx, struct ubus_object *obj,
34 struct ubus_request_data *req, const char *method,
35 struct blob_attr *msg)
42 mdns_scan(struct ubus_context *ctx, struct ubus_object *obj,
43 struct ubus_request_data *req, const char *method,
44 struct blob_attr *msg)
51 mdns_browse(struct ubus_context *ctx, struct ubus_object *obj,
52 struct ubus_request_data *req, const char *method,
53 struct blob_attr *msg)
55 struct cache_service *s, *q;
56 char *buffer = (char *) mdns_buf;
60 avl_for_each_element(&services, s, avl) {
62 if (*((char *) s->avl.key) != '_')
64 snprintf(buffer, MAX_NAME_LEN, "%s", (const char *) s->avl.key);
65 local = strstr(buffer, ".local");
68 if (!strcmp(buffer, "_tcp") || !strcmp(buffer, "_udp"))
72 c1 = blobmsg_open_table(&b, buffer);
74 snprintf(buffer, MAX_NAME_LEN, "%s", (const char *) s->entry);
75 local = strstr(buffer, "._");
78 c2 = blobmsg_open_table(&b, buffer);
79 strncat(buffer, ".local", MAX_NAME_LEN);
80 cache_dump_records(&b, buffer);
81 cache_dump_records(&b, s->entry);
82 blobmsg_close_table(&b, c2);
83 q = avl_next_element(s, avl);
84 if (!q || avl_is_last(&services, &s->avl) || strcmp(s->avl.key, q->avl.key)) {
85 blobmsg_close_table(&b, c1);
89 ubus_send_reply(ctx, req, b.head);
91 return UBUS_STATUS_OK;
95 mdns_hosts(struct ubus_context *ctx, struct ubus_object *obj,
96 struct ubus_request_data *req, const char *method,
97 struct blob_attr *msg)
99 struct cache_service *s;
100 char *buffer = (char *) mdns_buf;
103 blob_buf_init(&b, 0);
104 avl_for_each_element(&services, s, avl) {
106 if (*((char *) s->avl.key) == '_')
108 snprintf(buffer, MAX_NAME_LEN, "%s", (const char *) s->entry);
109 local = strstr(buffer, "._");
112 c = blobmsg_open_table(&b, buffer);
113 strncat(buffer, ".local", MAX_NAME_LEN);
114 cache_dump_records(&b, buffer);
115 cache_dump_records(&b, s->entry);
116 blobmsg_close_table(&b, c);
118 ubus_send_reply(ctx, req, b.head);
120 return UBUS_STATUS_OK;
123 static const struct blobmsg_policy config_policy[] = {
124 { "interfaces", BLOBMSG_TYPE_ARRAY },
128 mdns_set_config(struct ubus_context *ctx, struct ubus_object *obj,
129 struct ubus_request_data *req, const char *method,
130 struct blob_attr *msg)
132 struct blob_attr *data, *cur;
135 blobmsg_parse(config_policy, 1, &data, blob_data(msg), blob_len(msg));
137 return UBUS_STATUS_INVALID_ARGUMENT;
139 if (!blobmsg_check_attr_list(data, BLOBMSG_TYPE_STRING))
140 return UBUS_STATUS_INVALID_ARGUMENT;
142 vlist_update(&interfaces);
143 blobmsg_for_each_attr(cur, data, rem)
144 interface_add(blobmsg_data(cur));
145 vlist_flush(&interfaces);
157 static const struct blobmsg_policy query_policy[QUERY_MAX] = {
158 [QUERY_QUESTION]= { "question", BLOBMSG_TYPE_STRING },
159 [QUERY_IFACE] = { "interface", BLOBMSG_TYPE_STRING },
160 [QUERY_TYPE] = { "type", BLOBMSG_TYPE_INT32 },
164 mdns_query(struct ubus_context *ctx, struct ubus_object *obj,
165 struct ubus_request_data *req, const char *method,
166 struct blob_attr *msg)
168 struct blob_attr *tb[QUERY_MAX], *c;
169 const char *question = "_services._dns-sd._udp.local";
173 blobmsg_parse(query_policy, QUERY_MAX, tb, blob_data(msg), blob_len(msg));
175 if (!(c = tb[QUERY_IFACE]))
176 return UBUS_STATUS_INVALID_ARGUMENT;
178 ifname = blobmsg_get_string(c);
180 if ((c = tb[QUERY_QUESTION]))
181 question = blobmsg_get_string(c);
183 if ((c = tb[QUERY_TYPE]))
184 type = blobmsg_get_u32(c);
186 struct interface *iface_v4 = interface_get(ifname, 0, 1);
187 struct interface *iface_v6 = interface_get(ifname, 1, 1);
189 if (!iface_v4 && !iface_v6)
190 return UBUS_STATUS_NOT_FOUND;
192 if (!strcmp(method, "query")) {
194 dns_send_question(iface_v4, question, type, 0);
197 dns_send_question(iface_v6, question, type, 0);
199 return UBUS_STATUS_OK;
200 } else if (!strcmp(method, "fetch")) {
201 blob_buf_init(&b, 0);
202 void *k = blobmsg_open_array(&b, "records");
203 cache_dump_recursive(&b, question, type, iface_v4 ? iface_v4 : iface_v6);
204 blobmsg_close_array(&b, k);
205 ubus_send_reply(ctx, req, b.head);
206 return UBUS_STATUS_OK;
208 return UBUS_STATUS_INVALID_ARGUMENT;
213 static const struct ubus_method mdns_methods[] = {
214 UBUS_METHOD("set_config", mdns_set_config, config_policy),
215 UBUS_METHOD("query", mdns_query, query_policy),
216 UBUS_METHOD("fetch", mdns_query, query_policy),
217 UBUS_METHOD_NOARG("scan", mdns_scan),
218 UBUS_METHOD_NOARG("browse", mdns_browse),
219 UBUS_METHOD_NOARG("hosts", mdns_hosts),
220 UBUS_METHOD_NOARG("reload", mdns_reload),
223 static struct ubus_object_type mdns_object_type =
224 UBUS_OBJECT_TYPE("mdns", mdns_methods);
226 static struct ubus_object mdns_object = {
228 .type = &mdns_object_type,
229 .methods = mdns_methods,
230 .n_methods = ARRAY_SIZE(mdns_methods),
234 ubus_connect_handler(struct ubus_context *ctx)
238 ret = ubus_add_object(ctx, &mdns_object);
240 fprintf(stderr, "Failed to add object: %s\n", ubus_strerror(ret));
246 conn.cb = ubus_connect_handler;
247 ubus_auto_connect(&conn);
250 int ubus_service_list(ubus_data_handler_t cb)
255 blob_buf_init(&b, 0);
256 ret = ubus_lookup_id(&conn.ctx, "service", &id);
260 return ubus_invoke(&conn.ctx, id, "list", b.head, cb, NULL, 5 * 1000);