Bump mdns 2015.09.03
This commit is contained in:
jbnadal
275
src/3P/mdns/ubus.c
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275
src/3P/mdns/ubus.c
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/*
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* Copyright (C) 2014 John Crispin <blogic@openwrt.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License version 2.1
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* as published by the Free Software Foundation
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <sys/types.h>
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#include <arpa/inet.h>
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#include <stdio.h>
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#include <libubus.h>
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#include <libubox/vlist.h>
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#include <libubox/uloop.h>
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#include "util.h"
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#include "ubus.h"
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#include "cache.h"
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#include "service.h"
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#include "interface.h"
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static struct ubus_auto_conn conn;
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static struct blob_buf b;
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static int
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mdns_reload(struct ubus_context *ctx, struct ubus_object *obj,
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struct ubus_request_data *req, const char *method,
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struct blob_attr *msg)
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{
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service_init(1);
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return 0;
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}
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static int
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mdns_scan(struct ubus_context *ctx, struct ubus_object *obj,
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struct ubus_request_data *req, const char *method,
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struct blob_attr *msg)
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{
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cache_scan();
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return 0;
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}
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static int
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mdns_browse(struct ubus_context *ctx, struct ubus_object *obj,
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struct ubus_request_data *req, const char *method,
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struct blob_attr *msg)
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{
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struct cache_service *s, *q;
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char *buffer = (char *) mdns_buf;
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void *c1 = NULL, *c2;
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blob_buf_init(&b, 0);
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avl_for_each_element(&services, s, avl) {
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char *local;
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if (*((char *) s->avl.key) != '_')
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continue;
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snprintf(buffer, MAX_NAME_LEN, "%s", (const char *) s->avl.key);
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local = strstr(buffer, ".local");
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if (local)
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*local = '\0';
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if (!strcmp(buffer, "_tcp") || !strcmp(buffer, "_udp"))
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continue;
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if (!c1) {
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c1 = blobmsg_open_table(&b, buffer);
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}
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snprintf(buffer, MAX_NAME_LEN, "%s", (const char *) s->entry);
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local = strstr(buffer, "._");
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if (local)
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*local = '\0';
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c2 = blobmsg_open_table(&b, buffer);
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strncat(buffer, ".local", MAX_NAME_LEN);
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cache_dump_records(&b, buffer);
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cache_dump_records(&b, s->entry);
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blobmsg_close_table(&b, c2);
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q = avl_next_element(s, avl);
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if (!q || avl_is_last(&services, &s->avl) || strcmp(s->avl.key, q->avl.key)) {
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blobmsg_close_table(&b, c1);
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c1 = NULL;
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}
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}
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ubus_send_reply(ctx, req, b.head);
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return UBUS_STATUS_OK;
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}
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static int
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mdns_hosts(struct ubus_context *ctx, struct ubus_object *obj,
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struct ubus_request_data *req, const char *method,
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struct blob_attr *msg)
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{
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struct cache_service *s;
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char *buffer = (char *) mdns_buf;
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void *c;
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blob_buf_init(&b, 0);
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avl_for_each_element(&services, s, avl) {
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char *local;
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if (*((char *) s->avl.key) == '_')
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continue;
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snprintf(buffer, MAX_NAME_LEN, "%s", (const char *) s->entry);
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local = strstr(buffer, "._");
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if (local)
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*local = '\0';
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c = blobmsg_open_table(&b, buffer);
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strncat(buffer, ".local", MAX_NAME_LEN);
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cache_dump_records(&b, buffer);
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cache_dump_records(&b, s->entry);
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blobmsg_close_table(&b, c);
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}
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ubus_send_reply(ctx, req, b.head);
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return UBUS_STATUS_OK;
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}
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enum {
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CFG_INTERFACES,
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CFG_KEEP,
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CFG_MAX
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};
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static const struct blobmsg_policy config_policy[] = {
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[CFG_INTERFACES] = { "interfaces", BLOBMSG_TYPE_ARRAY },
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[CFG_KEEP] = { "keep", BLOBMSG_TYPE_BOOL },
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};
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static int
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mdns_set_config(struct ubus_context *ctx, struct ubus_object *obj,
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struct ubus_request_data *req, const char *method,
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struct blob_attr *msg)
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{
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struct blob_attr *data[CFG_MAX], *cur;
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int rem, keep = false;
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blobmsg_parse(config_policy, CFG_MAX, data, blob_data(msg), blob_len(msg));
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if (!data[CFG_INTERFACES])
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return UBUS_STATUS_INVALID_ARGUMENT;
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if (!blobmsg_check_attr_list(data[CFG_INTERFACES], BLOBMSG_TYPE_STRING))
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return UBUS_STATUS_INVALID_ARGUMENT;
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keep = data[CFG_KEEP] && blobmsg_get_bool(data[CFG_KEEP]);
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if (!keep) {
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vlist_update(&interfaces);
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ubus_notify(ctx, obj, "set_config", NULL, 1000);
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}
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blobmsg_for_each_attr(cur, data[CFG_INTERFACES], rem)
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interface_add(blobmsg_data(cur));
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if (!keep)
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vlist_flush(&interfaces);
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return 0;
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}
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enum query_attr {
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QUERY_QUESTION,
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QUERY_IFACE,
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QUERY_TYPE,
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QUERY_MAX
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};
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static const struct blobmsg_policy query_policy[QUERY_MAX] = {
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[QUERY_QUESTION]= { "question", BLOBMSG_TYPE_STRING },
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[QUERY_IFACE] = { "interface", BLOBMSG_TYPE_STRING },
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[QUERY_TYPE] = { "type", BLOBMSG_TYPE_INT32 },
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};
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static int
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mdns_query(struct ubus_context *ctx, struct ubus_object *obj,
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struct ubus_request_data *req, const char *method,
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struct blob_attr *msg)
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{
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struct blob_attr *tb[QUERY_MAX], *c;
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const char *question = "_services._dns-sd._udp.local";
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const char *ifname;
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int type = TYPE_ANY;
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blobmsg_parse(query_policy, QUERY_MAX, tb, blob_data(msg), blob_len(msg));
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if (!(c = tb[QUERY_IFACE]))
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return UBUS_STATUS_INVALID_ARGUMENT;
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ifname = blobmsg_get_string(c);
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if ((c = tb[QUERY_QUESTION]))
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question = blobmsg_get_string(c);
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if ((c = tb[QUERY_TYPE]))
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type = blobmsg_get_u32(c);
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struct interface *iface_v4 = interface_get(ifname, 0, 1);
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struct interface *iface_v6 = interface_get(ifname, 1, 1);
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if (!iface_v4 && !iface_v6)
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return UBUS_STATUS_NOT_FOUND;
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if (!strcmp(method, "query")) {
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if (iface_v4)
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dns_send_question(iface_v4, question, type, 0);
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if (iface_v6)
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dns_send_question(iface_v6, question, type, 0);
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return UBUS_STATUS_OK;
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} else if (!strcmp(method, "fetch")) {
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blob_buf_init(&b, 0);
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void *k = blobmsg_open_array(&b, "records");
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cache_dump_recursive(&b, question, type, iface_v4 ? iface_v4 : iface_v6);
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blobmsg_close_array(&b, k);
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ubus_send_reply(ctx, req, b.head);
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return UBUS_STATUS_OK;
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} else {
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return UBUS_STATUS_INVALID_ARGUMENT;
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}
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}
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static const struct ubus_method mdns_methods[] = {
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UBUS_METHOD("set_config", mdns_set_config, config_policy),
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UBUS_METHOD("query", mdns_query, query_policy),
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UBUS_METHOD("fetch", mdns_query, query_policy),
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UBUS_METHOD_NOARG("scan", mdns_scan),
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UBUS_METHOD_NOARG("browse", mdns_browse),
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UBUS_METHOD_NOARG("hosts", mdns_hosts),
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UBUS_METHOD_NOARG("reload", mdns_reload),
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};
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static struct ubus_object_type mdns_object_type =
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UBUS_OBJECT_TYPE("mdns", mdns_methods);
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static struct ubus_object mdns_object = {
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.name = "mdns",
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.type = &mdns_object_type,
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.methods = mdns_methods,
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.n_methods = ARRAY_SIZE(mdns_methods),
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};
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static void
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ubus_connect_handler(struct ubus_context *ctx)
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{
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int ret;
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ret = ubus_add_object(ctx, &mdns_object);
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if (ret)
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fprintf(stderr, "Failed to add object: %s\n", ubus_strerror(ret));
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}
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void
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ubus_startup(void)
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{
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conn.cb = ubus_connect_handler;
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ubus_auto_connect(&conn);
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}
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int ubus_service_list(ubus_data_handler_t cb)
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{
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uint32_t id;
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int ret;
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blob_buf_init(&b, 0);
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ret = ubus_lookup_id(&conn.ctx, "service", &id);
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if (ret)
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return ret;
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return ubus_invoke(&conn.ctx, id, "list", b.head, cb, NULL, 5 * 1000);
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}
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