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[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Demo/] [ARM9_STR91X_IAR/] [lwip/] [lwipWebServer/] [httpd.c] - Rev 613
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/* * Copyright (c) 2001-2003 Swedish Institute of Computer Science. * All rights reserved. * * Redistribution and use in source and binary forms, with or without modification, * are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * 3. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY * OF SUCH DAMAGE. * * This file is part of the lwIP TCP/IP stack. * * Author: Adam Dunkels <adam@sics.se> * */ #include "lwip/debug.h" #include "lwip/stats.h" #include "httpd.h" #include "lwip/tcp.h" #include "fs.h" #include <string.h> #pragma pack(2) struct http_state { char *file; u32_t left; u8_t retries; }; #pragma pack() /*-----------------------------------------------------------------------------------*/ void conn_err(void *arg, err_t err) { struct http_state *hs; hs = arg; mem_free(hs); } /*-----------------------------------------------------------------------------------*/ static void close_conn(struct tcp_pcb *pcb, struct http_state *hs) { tcp_arg(pcb, NULL); tcp_sent(pcb, NULL); tcp_recv(pcb, NULL); mem_free(hs); tcp_close(pcb); } /*-----------------------------------------------------------------------------------*/ static void send_data(struct tcp_pcb *pcb, struct http_state *hs) { err_t err; u16_t len; /* We cannot send more data than space available in the send buffer. */ if (tcp_sndbuf(pcb) < hs->left) { len = tcp_sndbuf(pcb); } else { len = hs->left; } do { err = tcp_write(pcb, hs->file, len, 0); if (err == ERR_MEM) { len /= 2; } } while (err == ERR_MEM && len > 1); if (err == ERR_OK) { hs->file += len; hs->left -= len; /* } else { printf("send_data: error %s len %d %d\n", lwip_strerr(err), len, tcp_sndbuf(pcb));*/ } } /*-----------------------------------------------------------------------------------*/ err_t http_poll(void *arg, struct tcp_pcb *pcb) { struct http_state *hs; hs = arg; /* printf("Polll\n");*/ if (hs == NULL) { /* printf("Null, close\n");*/ tcp_abort(pcb); return ERR_ABRT; } else { ++hs->retries; if (hs->retries == 4) { tcp_abort(pcb); return ERR_ABRT; } send_data(pcb, hs); } return ERR_OK; } /*-----------------------------------------------------------------------------------*/ err_t http_sent(void *arg, struct tcp_pcb *pcb, u16_t len) { struct http_state *hs; hs = arg; hs->retries = 0; if (hs->left > 0) { send_data(pcb, hs); } else { close_conn(pcb, hs); } return ERR_OK; } /*-----------------------------------------------------------------------------------*/ err_t http_recv(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err) { int i; char *data; struct fs_file file; struct http_state *hs; hs = arg; if (err == ERR_OK && p != NULL) { /* Inform TCP that we have taken the data. */ tcp_recved(pcb, p->tot_len); if (hs->file == NULL) { data = p->payload; if (strncmp(data, "GET ", 4) == 0) { for(i = 0; i < 40; i++) { if (((char *)data + 4)[i] == ' ' || ((char *)data + 4)[i] == '\r' || ((char *)data + 4)[i] == '\n') { ((char *)data + 4)[i] = 0; } } if (*(char *)(data + 4) == '/' && *(char *)(data + 5) == 0) { fs_open("/index.html", &file); } else { if (!fs_open((char *)data + 4, &file)) { fs_open("/404.html", &file); } } hs->file = file.data; hs->left = file.len; /* printf("data %p len %ld\n", hs->file, hs->left);*/ pbuf_free(p); send_data(pcb, hs); /* Tell TCP that we wish be to informed of data that has been successfully sent by a call to the http_sent() function. */ tcp_sent(pcb, http_sent); } else { pbuf_free(p); close_conn(pcb, hs); } } else { pbuf_free(p); } } if (err == ERR_OK && p == NULL) { close_conn(pcb, hs); } return ERR_OK; } /*-----------------------------------------------------------------------------------*/ err_t http_accept(void *arg, struct tcp_pcb *pcb, err_t err) { struct http_state *hs; tcp_setprio(pcb, TCP_PRIO_MIN); /* Allocate memory for the structure that holds the state of the connection. */ hs = mem_malloc(sizeof(struct http_state)); if (hs == NULL) { // printf("http_accept: Out of memory\n"); return ERR_MEM; } /* Initialize the structure. */ hs->file = NULL; hs->left = 0; hs->retries = 0; /* Tell TCP that this is the structure we wish to be passed for our callbacks. */ tcp_arg(pcb, hs); /* Tell TCP that we wish to be informed of incoming data by a call to the http_recv() function. */ tcp_recv(pcb, http_recv); tcp_err(pcb, conn_err); tcp_poll(pcb, http_poll, 4); return ERR_OK; } /*-----------------------------------------------------------------------------------*/ void httpd_init(void) { struct tcp_pcb *pcb; pcb = tcp_new(); tcp_bind(pcb, NULL, 80); pcb = tcp_listen(pcb); tcp_accept(pcb, http_accept); } /*-----------------------------------------------------------------------------------*/
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