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* Copyright (c) 2018 Nordic Semiconductor ASA
*
* SPDX-License-Identifier: Apache-2.0
*/
/** @file mqtt_transport_socket_tcp.h
*
* @brief Internal functions to handle transport over TCP socket.
*/
#include <logging/log.h>
LOG_MODULE_REGISTER(net_mqtt_sock_tcp, CONFIG_MQTT_LOG_LEVEL);
#include <errno.h>
#include <net/socket.h>
#include <net/mqtt.h>
#include "mqtt_os.h"
int mqtt_client_tcp_connect(struct mqtt_client *client)
{
const struct sockaddr *broker = client->broker;
int ret;
client->transport.tcp.sock = zsock_socket(broker->sa_family, SOCK_STREAM,
IPPROTO_TCP);
if (client->transport.tcp.sock < 0) {
return -errno;
}
#if defined(CONFIG_SOCKS)
if (client->transport.proxy.addrlen != 0) {
ret = setsockopt(client->transport.tcp.sock,
SOL_SOCKET, SO_SOCKS5,
&client->transport.proxy.addr,
client->transport.proxy.addrlen);
if (ret < 0) {
return -errno;
}
}
#endif
MQTT_TRC("Created socket %d", client->transport.tcp.sock);
size_t peer_addr_size = sizeof(struct sockaddr_in6);
if (broker->sa_family == AF_INET) {
peer_addr_size = sizeof(struct sockaddr_in);
}
ret = zsock_connect(client->transport.tcp.sock, client->broker,
peer_addr_size);
if (ret < 0) {
(void) zsock_close(client->transport.tcp.sock);
return -errno;
}
MQTT_TRC("Connect completed");
return 0;
}
int mqtt_client_tcp_write(struct mqtt_client *client, const uint8_t *data,
uint32_t datalen)
{
uint32_t offset = 0U;
int ret;
while (offset < datalen) {
ret = zsock_send(client->transport.tcp.sock, data + offset,
datalen - offset, 0);
if (ret < 0) {
return -errno;
}
offset += ret;
}
return 0;
}
int mqtt_client_tcp_write_msg(struct mqtt_client *client,
const struct msghdr *message)
{
int ret, i;
size_t offset = 0;
size_t total_len = 0;
for (i = 0; i < message->msg_iovlen; i++) {
total_len += message->msg_iov[i].iov_len;
}
while (offset < total_len) {
ret = zsock_sendmsg(client->transport.tcp.sock, message, 0);
if (ret < 0) {
return -errno;
}
offset += ret;
if (offset >= total_len) {
break;
}
/* Update msghdr for the next iteration. */
for (i = 0; i < message->msg_iovlen; i++) {
if (ret < message->msg_iov[i].iov_len) {
message->msg_iov[i].iov_len -= ret;
message->msg_iov[i].iov_base =
(uint8_t *)message->msg_iov[i].iov_base + ret;
break;
}
ret -= message->msg_iov[i].iov_len;
message->msg_iov[i].iov_len = 0;
}
}
return 0;
}
int mqtt_client_tcp_read(struct mqtt_client *client, uint8_t *data, uint32_t buflen,
bool shall_block)
{
int flags = 0;
int ret;
if (!shall_block) {
flags |= ZSOCK_MSG_DONTWAIT;
}
ret = zsock_recv(client->transport.tcp.sock, data, buflen, flags);
if (ret < 0) {
return -errno;
}
return ret;
}
int mqtt_client_tcp_disconnect(struct mqtt_client *client)
{
int ret;
MQTT_TRC("Closing socket %d", client->transport.tcp.sock);
ret = zsock_close(client->transport.tcp.sock);
if (ret < 0) {
return -errno;
}
return 0;
}
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