ESP8266 part of the f105-motor-demo project (see f105-motor-demo_stm32)
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f105-motor-demo_esp/libesphttpd/core/httpd-freertos.c

243 lines
7.0 KiB

9 years ago
/*
ESP8266 web server - platform-dependent routines, FreeRTOS version
Thanks to my collague at Espressif for writing the foundations of this code.
*/
#ifdef FREERTOS
#include <esp8266.h>
#include "httpd.h"
#include "platform.h"
#include "httpd-platform.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/queue.h"
#include "lwip/lwip/sockets.h"
static int httpPort;
static int httpMaxConnCt;
struct RtosConnType{
int fd;
int needWriteDoneNotif;
int needsClose;
int port;
char ip[4];
};
static RtosConnType rconn[HTTPD_MAX_CONNECTIONS];
int ICACHE_FLASH_ATTR httpdPlatSendData(ConnTypePtr conn, char *buff, int len) {
conn->needWriteDoneNotif=1;
return (write(conn->fd, buff, len)>=0);
}
void ICACHE_FLASH_ATTR httpdPlatDisconnect(ConnTypePtr conn) {
conn->needsClose=1;
conn->needWriteDoneNotif=1; //because the real close is done in the writable select code
}
void httpdPlatDisableTimeout(ConnTypePtr conn) {
//Unimplemented for FreeRTOS
}
#define RECV_BUF_SIZE 2048
static void platHttpServerTask(void *pvParameters) {
int32 listenfd;
int32 remotefd;
int32 len;
int32 ret;
int x;
int maxfdp = 0;
char *precvbuf;
fd_set readset,writeset;
struct sockaddr name;
//struct timeval timeout;
struct sockaddr_in server_addr;
struct sockaddr_in remote_addr;
for (x=0; x<HTTPD_MAX_CONNECTIONS; x++) {
rconn[x].fd=-1;
}
/* Construct local address structure */
memset(&server_addr, 0, sizeof(server_addr)); /* Zero out structure */
server_addr.sin_family = AF_INET; /* Internet address family */
server_addr.sin_addr.s_addr = INADDR_ANY; /* Any incoming interface */
server_addr.sin_len = sizeof(server_addr);
server_addr.sin_port = htons(httpPort); /* Local port */
/* Create socket for incoming connections */
do{
listenfd = socket(AF_INET, SOCK_STREAM, 0);
if (listenfd == -1) {
httpd_printf("platHttpServerTask: failed to create sock!\n");
vTaskDelay(1000/portTICK_RATE_MS);
}
} while(listenfd == -1);
/* Bind to the local port */
do{
ret = bind(listenfd, (struct sockaddr *)&server_addr, sizeof(server_addr));
if (ret != 0) {
httpd_printf("platHttpServerTask: failed to bind!\n");
vTaskDelay(1000/portTICK_RATE_MS);
}
} while(ret != 0);
do{
/* Listen to the local connection */
ret = listen(listenfd, HTTPD_MAX_CONNECTIONS);
if (ret != 0) {
httpd_printf("platHttpServerTask: failed to listen!\n");
vTaskDelay(1000/portTICK_RATE_MS);
}
} while(ret != 0);
httpd_printf("esphttpd: active and listening to connections.\n");
while(1){
// clear fdset, and set the select function wait time
int socketsFull=1;
maxfdp = 0;
FD_ZERO(&readset);
FD_ZERO(&writeset);
//timeout.tv_sec = 2;
//timeout.tv_usec = 0;
for(x=0; x<HTTPD_MAX_CONNECTIONS; x++){
if (rconn[x].fd!=-1) {
FD_SET(rconn[x].fd, &readset);
if (rconn[x].needWriteDoneNotif) FD_SET(rconn[x].fd, &writeset);
if (rconn[x].fd>maxfdp) maxfdp=rconn[x].fd;
} else {
socketsFull=0;
}
}
if (!socketsFull) {
FD_SET(listenfd, &readset);
if (listenfd>maxfdp) maxfdp=listenfd;
}
//polling all exist client handle,wait until readable/writable
ret = select(maxfdp+1, &readset, &writeset, NULL, NULL);//&timeout
if(ret > 0){
//See if we need to accept a new connection
if (FD_ISSET(listenfd, &readset)) {
len=sizeof(struct sockaddr_in);
remotefd = accept(listenfd, (struct sockaddr *)&remote_addr, (socklen_t *)&len);
if (remotefd<0) {
httpd_printf("platHttpServerTask: Huh? Accept failed.\n");
continue;
}
for(x=0; x<HTTPD_MAX_CONNECTIONS; x++) if (rconn[x].fd==-1) break;
if (x==HTTPD_MAX_CONNECTIONS) {
httpd_printf("platHttpServerTask: Huh? Got accept with all slots full.\n");
continue;
}
int keepAlive = 1; //enable keepalive
int keepIdle = 60; //60s
int keepInterval = 5; //5s
int keepCount = 3; //retry times
setsockopt(remotefd, SOL_SOCKET, SO_KEEPALIVE, (void *)&keepAlive, sizeof(keepAlive));
setsockopt(remotefd, IPPROTO_TCP, TCP_KEEPIDLE, (void*)&keepIdle, sizeof(keepIdle));
setsockopt(remotefd, IPPROTO_TCP, TCP_KEEPINTVL, (void *)&keepInterval, sizeof(keepInterval));
setsockopt(remotefd, IPPROTO_TCP, TCP_KEEPCNT, (void *)&keepCount, sizeof(keepCount));
rconn[x].fd=remotefd;
rconn[x].needWriteDoneNotif=0;
rconn[x].needsClose=0;
len=sizeof(name);
getpeername(remotefd, &name, (socklen_t *)&len);
struct sockaddr_in *piname=(struct sockaddr_in *)&name;
rconn[x].port=piname->sin_port;
memcpy(&rconn[x].ip, &piname->sin_addr.s_addr, sizeof(rconn[x].ip));
httpdConnectCb(&rconn[x], rconn[x].ip, rconn[x].port);
//os_timer_disarm(&connData[x].conn->stop_watch);
//os_timer_setfn(&connData[x].conn->stop_watch, (os_timer_func_t *)httpserver_conn_watcher, connData[x].conn);
//os_timer_arm(&connData[x].conn->stop_watch, STOP_TIMER, 0);
// httpd_printf("httpserver acpt index %d sockfd %d!\n", x, remotefd);
}
//See if anything happened on the existing connections.
for(x=0; x < HTTPD_MAX_CONNECTIONS; x++){
//Skip empty slots
if (rconn[x].fd==-1) continue;
//Check for write availability first: the read routines may write needWriteDoneNotif while
//the select didn't check for that.
if (rconn[x].needWriteDoneNotif && FD_ISSET(rconn[x].fd, &writeset)) {
rconn[x].needWriteDoneNotif=0; //Do this first, httpdSentCb may write something making this 1 again.
if (rconn[x].needsClose) {
//Do callback and close fd.
httpdDisconCb(&rconn[x], rconn[x].ip, rconn[x].port);
close(rconn[x].fd);
rconn[x].fd=-1;
} else {
httpdSentCb(&rconn[x], rconn[x].ip, rconn[x].port);
}
}
if (FD_ISSET(rconn[x].fd, &readset)) {
precvbuf=(char*)malloc(RECV_BUF_SIZE);
if (precvbuf==NULL) httpd_printf("platHttpServerTask: memory exhausted!\n");
ret=recv(rconn[x].fd, precvbuf, RECV_BUF_SIZE,0);
if (ret > 0) {
//Data received. Pass to httpd.
httpdRecvCb(&rconn[x], rconn[x].ip, rconn[x].port, precvbuf, ret);
} else {
//recv error,connection close
httpdDisconCb(&rconn[x], rconn[x].ip, rconn[x].port);
close(rconn[x].fd);
rconn[x].fd=-1;
}
if (precvbuf) free(precvbuf);
}
}
}
}
#if 0
//Deinit code, not used here.
/*release data connection*/
for(x=0; x < HTTPD_MAX_CONNECTIONS; x++){
//find all valid handle
if(connData[x].conn == NULL) continue;
if(connData[x].conn->sockfd >= 0){
os_timer_disarm((os_timer_t *)&connData[x].conn->stop_watch);
close(connData[x].conn->sockfd);
connData[x].conn->sockfd = -1;
connData[x].conn = NULL;
if(connData[x].cgi!=NULL) connData[x].cgi(&connData[x]); //flush cgi data
httpdRetireConn(&connData[x]);
}
}
/*release listen socket*/
close(listenfd);
vTaskDelete(NULL);
#endif
}
//Initialize listening socket, do general initialization
void ICACHE_FLASH_ATTR httpdPlatInit(int port, int maxConnCt) {
httpPort=port;
httpMaxConnCt=maxConnCt;
xTaskCreate(platHttpServerTask, (const signed char *)"esphttpd", HTTPD_STACKSIZE, NULL, 4, NULL);
}
#endif