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>
26 static struct ubus_auto_conn conn;
27 static struct blob_buf b;
30 mdns_reload(struct ubus_context *ctx, struct ubus_object *obj,
31 struct ubus_request_data *req, const char *method,
32 struct blob_attr *msg)
38 mdns_scan(struct ubus_context *ctx, struct ubus_object *obj,
39 struct ubus_request_data *req, const char *method,
40 struct blob_attr *msg)
47 mdns_add_records(const char *name)
49 struct cache_record *r, *q = avl_find_element(&records, name, r, avl);
51 char buffer[MAX_NAME_LEN];
60 if (r->txt && strlen(r->txt)) {
63 blobmsg_add_string(&b, "txt", txt);
64 txt = &txt[strlen(txt) + 1];
71 blobmsg_add_u32(&b, "port", r->port);
75 if ((r->rdlength == 4) && inet_ntop(AF_INET, r->rdata, buffer, INET6_ADDRSTRLEN))
76 blobmsg_add_string(&b, "ipv4", buffer);
80 if ((r->rdlength == 16) && inet_ntop(AF_INET6, r->rdata, buffer, INET6_ADDRSTRLEN))
81 blobmsg_add_string(&b, "ipv6", buffer);
84 q = avl_next_element(r, avl);
85 } while (q && !strcmp(r->record, q->record));
89 mdns_browse(struct ubus_context *ctx, struct ubus_object *obj,
90 struct ubus_request_data *req, const char *method,
91 struct blob_attr *msg)
93 struct cache_entry *s, *q;
94 char buffer[MAX_NAME_LEN];
98 avl_for_each_element(&entries, s, avl) {
100 if (*((char *) s->avl.key) != '_')
102 snprintf(buffer, MAX_NAME_LEN, s->avl.key);
103 local = strstr(buffer, ".local");
106 if (!strcmp(buffer, "_tcp") || !strcmp(buffer, "_udp"))
110 c1 = blobmsg_open_table(&b, buffer);
112 snprintf(buffer, MAX_NAME_LEN, s->entry);
113 local = strstr(buffer, "._");
116 c2 = blobmsg_open_table(&b, buffer);
117 strncat(buffer, ".local", MAX_NAME_LEN);
118 mdns_add_records(buffer);
119 mdns_add_records(s->entry);
120 blobmsg_close_table(&b, c2);
121 q = avl_next_element(s, avl);
122 if (!q || avl_is_last(&entries, &s->avl) || strcmp(s->avl.key, q->avl.key)) {
123 blobmsg_close_table(&b, c1);
127 ubus_send_reply(ctx, req, b.head);
129 return UBUS_STATUS_OK;
133 mdns_hosts(struct ubus_context *ctx, struct ubus_object *obj,
134 struct ubus_request_data *req, const char *method,
135 struct blob_attr *msg)
137 struct cache_entry *s;
138 char buffer[MAX_NAME_LEN];
141 blob_buf_init(&b, 0);
142 avl_for_each_element(&entries, s, avl) {
144 if (*((char *) s->avl.key) == '_')
146 snprintf(buffer, MAX_NAME_LEN, s->entry);
147 local = strstr(buffer, "._");
150 c = blobmsg_open_table(&b, buffer);
151 strncat(buffer, ".local", MAX_NAME_LEN);
152 mdns_add_records(buffer);
153 mdns_add_records(s->entry);
154 blobmsg_close_table(&b, c);
156 ubus_send_reply(ctx, req, b.head);
158 return UBUS_STATUS_OK;
161 static const struct ubus_method mdns_methods[] = {
162 UBUS_METHOD_NOARG("scan", mdns_scan),
163 UBUS_METHOD_NOARG("browse", mdns_browse),
164 UBUS_METHOD_NOARG("hosts", mdns_hosts),
165 UBUS_METHOD_NOARG("reload", mdns_reload),
168 static struct ubus_object_type mdns_object_type =
169 UBUS_OBJECT_TYPE("mdns", mdns_methods);
171 static struct ubus_object mdns_object = {
173 .type = &mdns_object_type,
174 .methods = mdns_methods,
175 .n_methods = ARRAY_SIZE(mdns_methods),
179 ubus_connect_handler(struct ubus_context *ctx)
183 ret = ubus_add_object(ctx, &mdns_object);
185 fprintf(stderr, "Failed to add object: %s\n", ubus_strerror(ret));
191 conn.cb = ubus_connect_handler;
192 ubus_auto_connect(&conn);