77 lines
1.9 KiB
C
77 lines
1.9 KiB
C
// Copyright 2018 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <string.h>
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#include <unistd.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include "ctrl_sock.h"
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/* Control socket, because in some network stacks select can't be woken up any
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* other way
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*/
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int cs_create_ctrl_sock(int port)
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{
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int fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
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if (fd < 0) {
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return -1;
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}
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int ret;
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struct sockaddr_in addr;
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memset(&addr, 0, sizeof(addr));
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addr.sin_family = AF_INET;
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addr.sin_port = htons(port);
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inet_aton("127.0.0.1", &addr.sin_addr);
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ret = bind(fd, (struct sockaddr *)&addr, sizeof(addr));
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if (ret < 0) {
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close(fd);
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return -1;
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}
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return fd;
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}
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void cs_free_ctrl_sock(int fd)
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{
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close(fd);
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}
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int cs_send_to_ctrl_sock(int send_fd, int port, void *data, unsigned int data_len)
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{
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int ret;
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struct sockaddr_in to_addr;
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to_addr.sin_family = AF_INET;
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to_addr.sin_port = htons(port);
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inet_aton("127.0.0.1", &to_addr.sin_addr);
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ret = sendto(send_fd, data, data_len, 0, (struct sockaddr *)&to_addr, sizeof(to_addr));
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if (ret < 0) {
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return -1;
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}
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return ret;
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}
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int cs_recv_from_ctrl_sock(int fd, void *data, unsigned int data_len)
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{
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int ret;
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ret = recvfrom(fd, data, data_len, 0, NULL, NULL);
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if (ret < 0) {
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return -1;
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}
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return ret;
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}
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