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/* MIT License
*
* Copyright (c) 2005 Daniel Stenberg
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* SPDX-License-Identifier: MIT
*/
#include "ares_setup.h"
#include "ares.h"
#include "ares_private.h"
int ares_getsock(ares_channel channel,
ares_socket_t *socks,
int numsocks) /* size of the 'socks' array */
{
struct server_state *server;
int i;
int sockindex=0;
int bitmap = 0;
unsigned int setbits = 0xffffffff;
/* Are there any active queries? */
size_t active_queries = ares__llist_len(channel->all_queries);
for (i = 0; i < channel->nservers; i++) {
ares__llist_node_t *node;
server = &channel->servers[i];
for (node = ares__llist_node_first(server->connections);
node != NULL;
node = ares__llist_node_next(node)) {
struct server_connection *conn = ares__llist_node_val(node);
if (sockindex >= numsocks || sockindex >= ARES_GETSOCK_MAXNUM)
break;
/* We only need to register interest in UDP sockets if we have
* outstanding queries.
*/
if (!active_queries && !conn->is_tcp)
continue;
socks[sockindex] = conn->fd;
if (active_queries || conn->is_tcp) {
bitmap |= ARES_GETSOCK_READABLE(setbits, sockindex);
}
if (conn->is_tcp && ares__buf_len(server->tcp_send)) {
/* then the tcp socket is also writable! */
bitmap |= ARES_GETSOCK_WRITABLE(setbits, sockindex);
}
sockindex++;
}
}
return bitmap;
}
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