ubus-example.c

   1 /*
   2  * Copyright (C) 2011 Felix Fietkau <nbd@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 <unistd.h>
  15
  16 #include "libubus.h"
  17
  18 static struct ubus_context *ctx;
  19 struct blob_buf b;
  20
  21 enum {
  22         HELLO_ID,
  23         HELLO_MSG,
  24         HELLO_LAST
  25 };
  26
  27 static const struct blobmsg_policy hello_policy[] = {
  28         [HELLO_ID] = { .name = "id", .type = BLOBMSG_TYPE_INT32 },
  29         [HELLO_MSG] = { .name = "msg", .type = BLOBMSG_TYPE_STRING },
  30 };
  31
  32 static int test_hello(struct ubus_context *ctx, struct ubus_object *obj,
  33                       struct ubus_request_data *req, const char *method,
  34                       struct blob_attr *msg)
  35 {
  36         struct blob_attr *tb[HELLO_LAST];
  37         char *msgstr = "(unknown)";
  38         char *strbuf;
  39
  40         blobmsg_parse(hello_policy, ARRAY_SIZE(hello_policy), tb, blob_data(msg), blob_len(msg));
  41
  42         if (tb[HELLO_MSG])
  43                 msgstr = blobmsg_data(tb[HELLO_MSG]);
  44
  45         blob_buf_init(&b, 0);
  46         strbuf = blobmsg_alloc_string_buffer(&b, "message", 64 + strlen(obj->name) + strlen(msgstr));
  47         sprintf(strbuf, "%s: Hello, world: %s", obj->name, msgstr);
  48         blobmsg_add_string_buffer(&b);
  49         ubus_send_reply(ctx, req, b.head);
  50         return 0;
  51 }
  52
  53 static const struct ubus_method test_methods[] = {
  54         UBUS_METHOD("hello", test_hello, hello_policy),
  55 };
  56
  57 static struct ubus_object_type test_object_type =
  58         UBUS_OBJECT_TYPE("test", test_methods);
  59
  60 static struct ubus_object test_object = {
  61         .name = "test",
  62         .type = &test_object_type,
  63         .methods = test_methods,
  64         .n_methods = ARRAY_SIZE(test_methods),
  65 };
  66
  67 static struct ubus_object test_object2 = {
  68         .name = "test2",
  69         .type = &test_object_type,
  70         .methods = test_methods,
  71         .n_methods = ARRAY_SIZE(test_methods),
  72 };
  73
  74 int main(int argc, char **argv)
  75 {
  76         const char *progname, *ubus_socket = NULL;
  77         int ret = 0;
  78         int ch;
  79
  80         progname = argv[0];
  81
  82         while ((ch = getopt(argc, argv, "s:")) != -1) {
  83                 switch (ch) {
  84                 case 's':
  85                         ubus_socket = optarg;
  86                         break;
  87                 default:
  88                         break;
  89                 }
  90         }
  91
  92         argc -= optind;
  93         argv += optind;
  94
  95         ctx = ubus_connect(ubus_socket);
  96         if (!ctx) {
  97                 fprintf(stderr, "Failed to connect to ubus\n");
  98                 return -1;
  99         }
 100
 101         ret = ubus_add_object(ctx, &test_object);
 102         if (ret)
 103                 fprintf(stderr, "Failed to add_object object: %s\n", ubus_strerror(ret));
 104
 105         ret = ubus_add_object(ctx, &test_object2);
 106         if (ret)
 107                 fprintf(stderr, "Failed to add_object object: %s\n", ubus_strerror(ret));
 108
 109         uloop_init();
 110         ubus_add_uloop(ctx);
 111         uloop_run();
 112         uloop_done();
 113
 114         ubus_free(ctx);
 115         return 0;
 116 }