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MQTT Client: Use LWIP socket options instead of select()

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This commit is contained in:
Angus Gratton 2016-05-28 17:31:39 +10:00
parent 42880fded5
commit b73b93c58c
2 changed files with 50 additions and 116 deletions
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129
extras/paho_mqtt_c/MQTTESP8266.c
View file

@ -1,15 +1,8 @@
/**
******************************************************************************
* @file MQTTESP8266.c
* @author Baoshi <mail(at)ba0sh1(dot)com>
* @version 0.1
* @date Sep 9, 2015
* @brief Eclipse Paho ported to ESP8266 RTOS
* Paho Embedded MQTT client, esp-open-rtos support.
*
******************************************************************************
* @copyright
*
* Copyright (c) 2015, Baoshi Zhu. All rights reserved.
* Copyright (c) 2015, Baoshi Zhu & 2016, Angus Gratton
* All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE.txt file.
*
@ -62,114 +55,64 @@ void InitTimer(Timer* timer)
timer->end_time = 0;
}
int mqtt_esp_read(Network* n, unsigned char* buffer, int len, int timeout_ms)
static int mqtt_esp_read(Network* n, unsigned char* buffer, int len, int timeout_ms)
{
struct timeval tv;
fd_set fdset;
int rc = 0;
int rcvd = 0;
FD_ZERO(&fdset);
FD_SET(n->my_socket, &fdset);
tv.tv_sec = timeout_ms / 1000;
tv.tv_usec = (timeout_ms % 1000) * 1000;
rc = select(n->my_socket + 1, &fdset, 0, 0, &tv);
if ((rc > 0) && (FD_ISSET(n->my_socket, &fdset)))
{
rcvd = recv(n->my_socket, buffer, len, 0);
/* set SO_RCVTIMEO if timeout_ms > 0 otherwise O_NONBLOCK */
lwip_setsockopt(n->socket, SOL_SOCKET, SO_RCVTIMEO, &timeout_ms, sizeof(int));
lwip_fcntl(n->socket, F_SETFL, (timeout_ms) > 0 ? 0 : O_NONBLOCK);
int r = recv(n->socket, buffer, len, 0);
if(r == 0) {
r = -1; /* 0 indicates timeout */
}
else
{
// select fail
return -1;
}
return rcvd;
return r;
}
int mqtt_esp_write(Network* n, unsigned char* buffer, int len, int timeout_ms)
static int mqtt_esp_write(Network* n, unsigned char* buffer, int len, int timeout_ms)
{
struct timeval tv;
fd_set fdset;
int rc = 0;
FD_ZERO(&fdset);
FD_SET(n->my_socket, &fdset);
tv.tv_sec = timeout_ms / 1000;
tv.tv_usec = (timeout_ms % 1000) * 1000;
rc = select(n->my_socket + 1, 0, &fdset, 0, &tv);
if ((rc > 0) && (FD_ISSET(n->my_socket, &fdset)))
{
rc = send(n->my_socket, buffer, len, 0);
lwip_setsockopt(n->socket, SOL_SOCKET, SO_SNDTIMEO, &timeout_ms, sizeof(int));
lwip_fcntl(n->socket, F_SETFL, (timeout_ms > 0) ? 0 : O_NONBLOCK);
int r = send(n->socket, buffer, len, 0);
if(r == 0) {
r = -1; /* 0 indicates timeout */
}
else
{
// select fail
return -1;
return r;
}
return rc;
}
void NewNetwork(Network* n)
{
n->my_socket = -1;
n->socket = -1;
n->mqttread = mqtt_esp_read;
n->mqttwrite = mqtt_esp_write;
}
static int host2addr(const char *hostname , struct in_addr *in)
{
struct addrinfo hints, *servinfo, *p;
struct sockaddr_in *h;
int rv;
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_INET;
hints.ai_socktype = SOCK_STREAM;
rv = getaddrinfo(hostname, 0 , &hints , &servinfo);
if (rv != 0)
{
return rv;
}
// loop through all the results and get the first resolve
for (p = servinfo; p != 0; p = p->ai_next)
{
h = (struct sockaddr_in *)p->ai_addr;
in->s_addr = h->sin_addr.s_addr;
}
freeaddrinfo(servinfo); // all done with this structure
return 0;
}
int ConnectNetwork(Network* n, const char* host, int port)
{
struct sockaddr_in addr;
ip_addr_t ipaddr;
int ret;
if (host2addr(host, &(addr.sin_addr)) != 0)
{
return -1;
err_t e = netconn_gethostbyname(host, &ipaddr);
if(e) {
return e;
}
inet_addr_from_ipaddr(&(addr.sin_addr), &ipaddr);
addr.sin_family = AF_INET;
addr.sin_port = htons(port);
n->my_socket = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
if( n->my_socket < 0 )
{
// error
return -1;
}
ret = connect(n->my_socket, ( struct sockaddr *)&addr, sizeof(struct sockaddr_in));
ret = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
if (ret < 0)
{
// error
close(n->my_socket);
return ret;
}
n->socket = ret;
ret = connect(n->socket, ( struct sockaddr *)&addr, sizeof(struct sockaddr_in));
if (ret < 0)
{
close(n->socket);
n->socket = -1;
return ret;
}
@ -179,7 +122,7 @@ int ConnectNetwork(Network* n, const char* host, int port)
int DisconnectNetwork(Network* n)
{
close(n->my_socket);
n->my_socket = -1;
close(n->socket);
n->socket = -1;
return 0;
}

25
extras/paho_mqtt_c/MQTTESP8266.h
View file

@ -1,15 +1,8 @@
/**
******************************************************************************
* @file MQTTESP8266.h
* @author Baoshi <mail(at)ba0sh1(dot)com>
* @version 0.1
* @date Sep 9, 2015
* @brief Eclipse Paho ported to ESP8266 RTOS
* Paho Embedded MQTT client, esp-open-rtos support.
*
******************************************************************************
* @copyright
*
* Copyright (c) 2015, Baoshi Zhu. All rights reserved.
* Copyright (c) 2015, Baoshi Zhu & 2016, Angus Gratton.
* All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE.txt file.
*
@ -24,18 +17,20 @@
#include <FreeRTOS.h>
#include <portmacro.h>
#include <lwip/api.h>
typedef struct Timer Timer;
typedef struct Network Network;
struct Timer
{
portTickType end_time;
};
typedef struct Network Network;
struct Network
{
int my_socket;
int socket;
int (*mqttread) (Network*, unsigned char*, int, int);
int (*mqttwrite) (Network*, unsigned char*, int, int);
};
@ -47,10 +42,6 @@ int left_ms(Timer*);
void InitTimer(Timer*);
int mqtt_esp_read(Network*, unsigned char*, int, int);
int mqtt_esp_write(Network*, unsigned char*, int, int);
void mqtt_esp_disconnect(Network*);
void NewNetwork(Network* n);
int ConnectNetwork(Network* n, const char* host, int port);
int DisconnectNetwork(Network* n);