add ipv6 support
[project/mdnsd.git] / ubus.c
1 /*
2 * Copyright (C) 2014 John Crispin <blogic@openwrt.org>
3 *
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
7 *
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.
12 */
13
14 #include <sys/types.h>
15 #include <arpa/inet.h>
16
17 #include <stdio.h>
18
19 #include <libubus.h>
20 #include <libubox/vlist.h>
21 #include <libubox/uloop.h>
22
23 #include "util.h"
24 #include "ubus.h"
25 #include "cache.h"
26 #include "service.h"
27 #include "interface.h"
28
29 static struct ubus_auto_conn conn;
30 static struct blob_buf b;
31
32 static int
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)
36 {
37 service_init();
38 return 0;
39 }
40
41 static int
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)
45 {
46 cache_scan();
47 return 0;
48 }
49
50 static int
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)
54 {
55 struct cache_entry *s, *q;
56 char *buffer = (char *) mdns_buf;
57 void *c1 = NULL, *c2;
58
59 blob_buf_init(&b, 0);
60 avl_for_each_element(&entries, s, avl) {
61 char *local;
62 if (*((char *) s->avl.key) != '_')
63 continue;
64 snprintf(buffer, MAX_NAME_LEN, "%s", (const char *) s->avl.key);
65 local = strstr(buffer, ".local");
66 if (local)
67 *local = '\0';
68 if (!strcmp(buffer, "_tcp") || !strcmp(buffer, "_udp"))
69 continue;
70
71 if (!c1) {
72 c1 = blobmsg_open_table(&b, buffer);
73 }
74 snprintf(buffer, MAX_NAME_LEN, "%s", (const char *) s->entry);
75 local = strstr(buffer, "._");
76 if (local)
77 *local = '\0';
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(&entries, &s->avl) || strcmp(s->avl.key, q->avl.key)) {
85 blobmsg_close_table(&b, c1);
86 c1 = NULL;
87 }
88 }
89 ubus_send_reply(ctx, req, b.head);
90
91 return UBUS_STATUS_OK;
92 }
93
94 static int
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)
98 {
99 struct cache_entry *s;
100 char *buffer = (char *) mdns_buf;
101 void *c;
102
103 blob_buf_init(&b, 0);
104 avl_for_each_element(&entries, s, avl) {
105 char *local;
106 if (*((char *) s->avl.key) == '_')
107 continue;
108 snprintf(buffer, MAX_NAME_LEN, "%s", (const char *) s->entry);
109 local = strstr(buffer, "._");
110 if (local)
111 *local = '\0';
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);
117 }
118 ubus_send_reply(ctx, req, b.head);
119
120 return UBUS_STATUS_OK;
121 }
122
123 static const struct blobmsg_policy config_policy[] = {
124 { "interfaces", BLOBMSG_TYPE_ARRAY },
125 };
126
127 static int
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)
131 {
132 struct blob_attr *data, *cur;
133 int rem;
134
135 blobmsg_parse(config_policy, 1, &data, blob_data(msg), blob_len(msg));
136 if (!data)
137 return UBUS_STATUS_INVALID_ARGUMENT;
138
139 if (!blobmsg_check_attr_list(data, BLOBMSG_TYPE_STRING))
140 return UBUS_STATUS_INVALID_ARGUMENT;
141
142 vlist_update(&interfaces);
143 blobmsg_for_each_attr(cur, data, rem)
144 interface_add(blobmsg_data(cur));
145 vlist_flush(&interfaces);
146
147 return 0;
148 }
149
150
151 static const struct ubus_method mdns_methods[] = {
152 UBUS_METHOD("set_config", mdns_set_config, config_policy),
153 UBUS_METHOD_NOARG("scan", mdns_scan),
154 UBUS_METHOD_NOARG("browse", mdns_browse),
155 UBUS_METHOD_NOARG("hosts", mdns_hosts),
156 UBUS_METHOD_NOARG("reload", mdns_reload),
157 };
158
159 static struct ubus_object_type mdns_object_type =
160 UBUS_OBJECT_TYPE("mdns", mdns_methods);
161
162 static struct ubus_object mdns_object = {
163 .name = "mdns",
164 .type = &mdns_object_type,
165 .methods = mdns_methods,
166 .n_methods = ARRAY_SIZE(mdns_methods),
167 };
168
169 static void
170 ubus_connect_handler(struct ubus_context *ctx)
171 {
172 int ret;
173
174 ret = ubus_add_object(ctx, &mdns_object);
175 if (ret)
176 fprintf(stderr, "Failed to add object: %s\n", ubus_strerror(ret));
177 }
178
179 void
180 ubus_startup(void)
181 {
182 conn.cb = ubus_connect_handler;
183 ubus_auto_connect(&conn);
184 }