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/avl.h>
21 #include <libubox/uloop.h>
27 static struct ubus_auto_conn conn;
28 static struct blob_buf b;
31 mdns_reload(struct ubus_context *ctx, struct ubus_object *obj,
32 struct ubus_request_data *req, const char *method,
33 struct blob_attr *msg)
40 mdns_scan(struct ubus_context *ctx, struct ubus_object *obj,
41 struct ubus_request_data *req, const char *method,
42 struct blob_attr *msg)
49 mdns_add_records(const char *name)
51 struct cache_record *r, *q = avl_find_element(&records, name, r, avl);
53 char buffer[MAX_NAME_LEN];
62 if (r->txt && strlen(r->txt)) {
65 blobmsg_add_string(&b, "txt", txt);
66 txt = &txt[strlen(txt) + 1];
73 blobmsg_add_u32(&b, "port", r->port);
77 if ((r->rdlength == 4) && inet_ntop(AF_INET, r->rdata, buffer, INET6_ADDRSTRLEN))
78 blobmsg_add_string(&b, "ipv4", buffer);
82 if ((r->rdlength == 16) && inet_ntop(AF_INET6, r->rdata, buffer, INET6_ADDRSTRLEN))
83 blobmsg_add_string(&b, "ipv6", buffer);
86 q = avl_next_element(r, avl);
87 } while (q && !strcmp(r->record, q->record));
91 mdns_browse(struct ubus_context *ctx, struct ubus_object *obj,
92 struct ubus_request_data *req, const char *method,
93 struct blob_attr *msg)
95 struct cache_entry *s, *q;
96 char buffer[MAX_NAME_LEN];
100 avl_for_each_element(&entries, s, avl) {
102 if (*((char *) s->avl.key) != '_')
104 snprintf(buffer, MAX_NAME_LEN, s->avl.key);
105 local = strstr(buffer, ".local");
108 if (!strcmp(buffer, "_tcp") || !strcmp(buffer, "_udp"))
112 c1 = blobmsg_open_table(&b, buffer);
114 snprintf(buffer, MAX_NAME_LEN, s->entry);
115 local = strstr(buffer, "._");
118 c2 = blobmsg_open_table(&b, buffer);
119 strncat(buffer, ".local", MAX_NAME_LEN);
120 mdns_add_records(buffer);
121 mdns_add_records(s->entry);
122 blobmsg_close_table(&b, c2);
123 q = avl_next_element(s, avl);
124 if (!q || avl_is_last(&entries, &s->avl) || strcmp(s->avl.key, q->avl.key)) {
125 blobmsg_close_table(&b, c1);
129 ubus_send_reply(ctx, req, b.head);
131 return UBUS_STATUS_OK;
135 mdns_hosts(struct ubus_context *ctx, struct ubus_object *obj,
136 struct ubus_request_data *req, const char *method,
137 struct blob_attr *msg)
139 struct cache_entry *s;
140 char buffer[MAX_NAME_LEN];
143 blob_buf_init(&b, 0);
144 avl_for_each_element(&entries, s, avl) {
146 if (*((char *) s->avl.key) == '_')
148 snprintf(buffer, MAX_NAME_LEN, s->entry);
149 local = strstr(buffer, "._");
152 c = blobmsg_open_table(&b, buffer);
153 strncat(buffer, ".local", MAX_NAME_LEN);
154 mdns_add_records(buffer);
155 mdns_add_records(s->entry);
156 blobmsg_close_table(&b, c);
158 ubus_send_reply(ctx, req, b.head);
160 return UBUS_STATUS_OK;
163 static const struct ubus_method mdns_methods[] = {
164 UBUS_METHOD_NOARG("scan", mdns_scan),
165 UBUS_METHOD_NOARG("browse", mdns_browse),
166 UBUS_METHOD_NOARG("hosts", mdns_hosts),
167 UBUS_METHOD_NOARG("reload", mdns_reload),
170 static struct ubus_object_type mdns_object_type =
171 UBUS_OBJECT_TYPE("mdns", mdns_methods);
173 static struct ubus_object mdns_object = {
175 .type = &mdns_object_type,
176 .methods = mdns_methods,
177 .n_methods = ARRAY_SIZE(mdns_methods),
181 ubus_connect_handler(struct ubus_context *ctx)
185 ret = ubus_add_object(ctx, &mdns_object);
187 fprintf(stderr, "Failed to add object: %s\n", ubus_strerror(ret));
193 conn.cb = ubus_connect_handler;
194 ubus_auto_connect(&conn);