125 lines
3.3 KiB
C
125 lines
3.3 KiB
C
/* SPDX-FileCopyrightText: 2016, Matthias Schiffer <mschiffer@universe-factory.net> */
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/* SPDX-License-Identifier: BSD-2-Clause */
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#include <respondd.h>
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#include <json-c/json.h>
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#include <libgluonutil.h>
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#include <uci.h>
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#include <stdlib.h>
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#include <string.h>
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static struct uci_section * get_first_section(struct uci_package *p, const char *type) {
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struct uci_element *e;
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uci_foreach_element(&p->sections, e) {
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struct uci_section *s = uci_to_section(e);
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if (!strcmp(s->type, type))
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return s;
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}
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return NULL;
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}
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static const char * get_first_option(struct uci_context *ctx, struct uci_package *p, const char *type, const char *option) {
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struct uci_section *s = get_first_section(p, type);
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if (s)
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return uci_lookup_option_string(ctx, s, option);
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else
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return NULL;
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}
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static struct json_object * get_number(struct uci_context *ctx, struct uci_section *s, const char *name) {
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const char *val = uci_lookup_option_string(ctx, s, name);
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if (!val || !*val)
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return NULL;
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char *end;
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double d = strtod(val, &end);
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if (*end)
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return NULL;
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struct json_object *jso = json_object_new_double(d);
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json_object_set_serializer(jso, json_object_double_to_json_string, "%.8f", NULL);
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return jso;
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}
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static void maybe_add_number(struct uci_context *ctx, struct uci_section *s, const char *name, struct json_object *parent) {
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struct json_object *jso = get_number(ctx, s, name);
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if (jso)
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json_object_object_add(parent, name, jso);
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}
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static struct json_object * get_location(struct uci_context *ctx, struct uci_package *p) {
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struct uci_section *s = get_first_section(p, "location");
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if (!s)
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return NULL;
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const char *share = uci_lookup_option_string(ctx, s, "share_location");
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if (!share || strcmp(share, "1"))
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return NULL;
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struct json_object *ret = json_object_new_object();
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maybe_add_number(ctx, s, "latitude", ret);
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maybe_add_number(ctx, s, "longitude", ret);
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maybe_add_number(ctx, s, "altitude", ret);
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return ret;
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}
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static struct json_object * get_owner(struct uci_context *ctx, struct uci_package *p) {
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const char *contact = get_first_option(ctx, p, "owner", "contact");
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if (!contact || !*contact)
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return NULL;
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struct json_object *ret = json_object_new_object();
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json_object_object_add(ret, "contact", gluonutil_wrap_string(contact));
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return ret;
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}
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static struct json_object * get_system(struct uci_context *ctx, struct uci_package *p) {
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struct json_object *ret = json_object_new_object();
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const char *role = get_first_option(ctx, p, "system", "role");
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if (role && *role)
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json_object_object_add(ret, "role", gluonutil_wrap_string(role));
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return ret;
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}
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static struct json_object * respondd_provider_nodeinfo(void) {
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struct json_object *ret = json_object_new_object();
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struct uci_context *ctx = uci_alloc_context();
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if (!ctx)
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return ret;
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ctx->flags &= ~UCI_FLAG_STRICT;
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struct uci_package *p;
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if (!uci_load(ctx, "gluon-node-info", &p)) {
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struct json_object *location = get_location(ctx, p);
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if (location)
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json_object_object_add(ret, "location", location);
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struct json_object *owner = get_owner(ctx, p);
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if (owner)
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json_object_object_add(ret, "owner", owner);
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json_object_object_add(ret, "system", get_system(ctx, p));
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}
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uci_free_context(ctx);
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return ret;
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}
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const struct respondd_provider_info respondd_providers[] = {
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{"nodeinfo", respondd_provider_nodeinfo},
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{}
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};
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