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