ubus-example.c

   1 #include <unistd.h>
   2
   3 #include "libubus.h"
   4
   5 static struct ubus_context *ctx;
   6 struct blob_buf b;
   7
   8 static const struct ubus_signature test_object_sig[] = {
   9         UBUS_METHOD_START("hello"),
  10           UBUS_ARRAY("test"),
  11                 UBUS_TABLE_START(NULL),
  12                   UBUS_FIELD(INT32, "id"),
  13                   UBUS_FIELD(STRING, "msg"),
  14                 UBUS_TABLE_END(),
  15         UBUS_METHOD_END(),
  16 };
  17
  18 static struct ubus_object_type test_object_type =
  19         UBUS_OBJECT_TYPE("test", test_object_sig);
  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         { .name = "hello", .handler = test_hello },
  55 };
  56
  57 static struct ubus_object test_object = {
  58         .name = "test",
  59         .type = &test_object_type,
  60         .methods = test_methods,
  61         .n_methods = ARRAY_SIZE(test_methods),
  62 };
  63
  64 static struct ubus_object test_object2 = {
  65         .name = "test2",
  66         .type = &test_object_type,
  67         .methods = test_methods,
  68         .n_methods = ARRAY_SIZE(test_methods),
  69 };
  70
  71 int main(int argc, char **argv)
  72 {
  73         const char *progname, *ubus_socket = NULL;
  74         int ret = 0;
  75         int ch;
  76
  77         progname = argv[0];
  78
  79         while ((ch = getopt(argc, argv, "s:")) != -1) {
  80                 switch (ch) {
  81                 case 's':
  82                         ubus_socket = optarg;
  83                         break;
  84                 default:
  85                         break;
  86                 }
  87         }
  88
  89         argc -= optind;
  90         argv += optind;
  91
  92         ctx = ubus_connect(ubus_socket);
  93         if (!ctx) {
  94                 fprintf(stderr, "Failed to connect to ubus\n");
  95                 return -1;
  96         }
  97
  98         ret = ubus_add_object(ctx, &test_object);
  99         if (ret)
 100                 fprintf(stderr, "Failed to add_object object: %s\n", ubus_strerror(ret));
 101
 102         ret = ubus_add_object(ctx, &test_object2);
 103         if (ret)
 104                 fprintf(stderr, "Failed to add_object object: %s\n", ubus_strerror(ret));
 105
 106         uloop_init();
 107         ubus_add_uloop(ctx);
 108         uloop_run();
 109         uloop_done();
 110
 111         ubus_free(ctx);
 112         return 0;
 113 }