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nuttx-apps/netutils/webserver/httpd.c
YAMAMOTO Takashi 6520eb65b3 netutils/webserver/httpd.c: Fix syslog formats
2020-11-26 19:28:14 -08:00

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/****************************************************************************
* netutils/webserver/httpd.c
* httpd Web server
*
* Copyright (C) 2007-2009, 2011-2012 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* This is a leverage of similar logic from uIP:
*
* Author: Adam Dunkels <adam@sics.se>
* Copyright (c) 2004, Adam Dunkels.
* All rights reserved.
*
* The uIP web server is a very simplistic implementation of an HTTP
* server. It can serve web pages and files from a read-only ROM
* filesystem, and provides a very small scripting language.
*
* 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. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``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 INSTITUTE OR CONTRIBUTORS 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.
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <strings.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <debug.h>
#ifndef CONFIG_NETUTILS_HTTPD_SINGLECONNECT
# include <pthread.h>
#endif
#include <arpa/inet.h>
#include "netutils/netlib.h"
#include "netutils/httpd.h"
#include "httpd.h"
#include "httpd_cgi.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#if !defined(CONFIG_NETUTILS_HTTPD_SCRIPT_DISABLE) && \
defined(CONFIG_NETUTILS_HTTPD_SENDFILE)
# error "Script support and CONFIG_NETUTILS_HTTPD_SENDFILE are mutually exclusive"
#endif
#if defined(CONFIG_NETUTILS_HTTPD_SENDFILE) && \
defined(CONFIG_NETUTILS_HTTPD_MMAP)
# error "CONFIG_NETUTILS_HTTPD_SENDFILE and CONFIG_NETUTILS_HTTPD_MMAP are mutually exclusive"
#endif
#define ISO_NL 0x0a
#define ISO_SPACE 0x20
#define ISO_BANG 0x21
#define ISO_PERCENT 0x25
#define ISO_PERIOD 0x2e
#define ISO_SLASH 0x2f
#define ISO_COLON 0x3a
#ifndef CONFIG_NETUTILS_HTTPD_PATH
# define CONFIG_NETUTILS_HTTPD_PATH "/mnt"
#endif
#ifndef CONFIG_NETUTILS_HTTPD_ERRPATH
# define CONFIG_NETUTILS_HTTPD_ERRPATH ""
#endif
/* The correct way to disable receive timeout errors is by setting the
* timeout to zero.
*/
#ifndef CONFIG_NETUTILS_HTTPD_TIMEOUT
# define CONFIG_NETUTILS_HTTPD_TIMEOUT 0
#endif
/* If timeouts are not enabled, then keep-alive is disabled. This is to
* prevent a rogue HTTP client from blocking the httpd indefinitely.
*/
#if !defined(CONFIG_NETUTILS_HTTPD_KEEPALIVE_DISABLE)
# if CONFIG_NETUTILS_HTTPD_TIMEOUT == 0
# define CONFIG_NETUTILS_HTTPD_KEEPALIVE_DISABLE
# endif
#endif
#ifdef CONFIG_NETUTILS_HTTPD_CLASSIC
# ifndef CONFIG_NETUTILS_HTTPD_INDEX
# ifndef CONFIG_NETUTILS_HTTPD_SCRIPT_DISABLE
# define CONFIG_NETUTILS_HTTPD_INDEX "index.shtml"
# else
# define CONFIG_NETUTILS_HTTPD_INDEX "index.html"
# endif
# endif
#endif
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
static int httpd_open(const char *name, struct httpd_fs_file *file)
{
#if defined(CONFIG_NETUTILS_HTTPD_CLASSIC)
return httpd_fs_open(name, file);
#elif defined(CONFIG_NETUTILS_HTTPD_MMAP)
return httpd_mmap_open(name, file);
#elif defined(CONFIG_NETUTILS_HTTPD_SENDFILE)
return httpd_sendfile_open(name, file);
#else
# error "No file handling method"
#endif
}
static int httpd_openindex(struct httpd_state *pstate)
{
int ret;
size_t z;
z = strlen(pstate->ht_filename);
if (z > 0 && pstate->ht_filename[z - 1] == '/')
{
pstate->ht_filename[--z] = '\0';
}
ret = httpd_open(pstate->ht_filename, &pstate->ht_file);
#if defined(CONFIG_NETUTILS_HTTPD_SENDFILE) || \
defined(CONFIG_NETUTILS_HTTPD_MMAP)
# if defined(CONFIG_NETUTILS_HTTPD_INDEX)
if (ret == ERROR && errno == EISDIR)
{
snprintf(pstate->ht_filename + z,
sizeof pstate->ht_filename - z, "/%s",
CONFIG_NETUTILS_HTTPD_INDEX);
ret = httpd_open(pstate->ht_filename, &pstate->ht_file);
}
# endif
#endif
return ret;
}
static int httpd_close(struct httpd_fs_file *file)
{
#if defined(CONFIG_NETUTILS_HTTPD_CLASSIC)
return OK;
#elif defined(CONFIG_NETUTILS_HTTPD_MMAP)
return httpd_mmap_close(file);
#elif defined(CONFIG_NETUTILS_HTTPD_SENDFILE)
return httpd_sendfile_close(file);
#else
# error "No file handling method"
#endif
}
/****************************************************************************
* Name: httpd_send_datachunk
*
* Description:
* Sends a chunk of HTML data using either chunked or non-chunked encoding.
*
* Input Parameters:
* sockfd Socket to which to send the data.
* data Data to send
* len Length of data to send
* chunked If True, sends an HTTP Chunked-Encoding prolog before the data
* block, and a HTTP Chunked-Encoding epilog ("\r\n") after the
* data block. If False, just sends the data.
*
* Returned Value:
* On success, returns >=0. On failure, returns a negative number
* indicating the failure code.
*
****************************************************************************/
int httpd_send_datachunk(int sockfd, void *data, int len, bool chunked)
{
int ret = 0;
#if defined(CONFIG_NETUTILS_HTTPD_ENABLE_CHUNKED_ENCODING)
char chunked_info[HTTPD_MAX_CHUNKEDLEN];
#endif
#if defined(CONFIG_NETUTILS_HTTPD_ENABLE_CHUNKED_ENCODING)
/* Chunk prolog */
if (chunked)
{
int chunked_info_len = snprintf(chunked_info, HTTPD_MAX_CHUNKEDLEN,
"%X\r\n", len);
ret = send(sockfd, chunked_info, chunked_info_len, 0);
DEBUGASSERT(ret == chunked_info_len);
}
#endif
if (ret >= 0)
{
if (len == 0)
{
/* Lower layer does not tolerate buf = NULL even if len = 0
* so just pass a dummy pointer.
*/
data = &len;
}
ret = send(sockfd, data, len, 0);
DEBUGASSERT(ret == len);
}
#if defined(CONFIG_NETUTILS_HTTPD_ENABLE_CHUNKED_ENCODING)
/* Chunk epilog */
if (ret >= 0)
{
if (chunked)
{
ret = send(sockfd, "\r\n", 2, 0);
DEBUGASSERT(ret == 2);
}
}
#endif
return ret;
}
#ifdef CONFIG_NETUTILS_HTTPD_DUMPBUFFER
static void httpd_dumpbuffer(FAR const char *msg, FAR const char *buffer,
unsigned int nbytes)
{
/* CONFIG_DEBUG_FEATURES, CONFIG_DEBUG_INFO, and CONFIG_DEBUG_NET have to
* be defined or the following does nothing.
*/
ninfodumpbuffer(msg, (FAR const uint8_t *)buffer, nbytes);
}
#else
# define httpd_dumpbuffer(msg,buffer,nbytes)
#endif
#ifdef CONFIG_NETUTILS_HTTPD_DUMPPSTATE
static void httpd_dumppstate(struct httpd_state *pstate, const char *msg)
{
#if defined(CONFIG_DEBUG_FEATURES) && defined(CONFIG_DEBUG_INFO) && defined(CONFIG_DEBUG_NET)
ninfo("[%d] pstate(%p): [%s]\n", pstate->ht_sockfd, pstate, msg);
ninfo(" filename: [%s]\n", pstate->ht_filename);
ninfo(" htfile len: %d\n", pstate->ht_file.len);
ninfo(" sockfd: %d\n", pstate->ht_sockfd);
#ifndef CONFIG_NETUTILS_HTTPD_SCRIPT_DISABLE
ninfo(" scriptptr: %p\n", pstate->ht_scriptptr);
ninfo(" scriptlen: %d\n", pstate->ht_scriptlen);
#endif
ninfo(" sndlen: %d\n", pstate->ht_sndlen);
#endif
}
#else
# define httpd_dumppstate(pstate, msg)
#endif
#ifndef CONFIG_NETUTILS_HTTPD_SCRIPT_DISABLE
static void next_scriptstate(struct httpd_state *pstate)
{
char *p;
p = strchr(pstate->ht_scriptptr, ISO_NL) + 1;
pstate->ht_scriptlen -= (unsigned short)(p - pstate->ht_scriptptr);
pstate->ht_scriptptr = p;
}
#endif
#ifndef CONFIG_NETUTILS_HTTPD_SCRIPT_DISABLE
static int handle_script(struct httpd_state *pstate)
{
int len;
char *ptr;
int status;
bool chunked_http_tx = 0;
#if defined(CONFIG_NETUTILS_HTTPD_ENABLE_CHUNKED_ENCODING)
chunked_http_tx = pstate->ht_chunked;
#endif
while (pstate->ht_file.len > 0)
{
/* Check if we should start executing a script */
if (*pstate->ht_file.data == ISO_PERCENT &&
*(pstate->ht_file.data + 1) == ISO_BANG)
{
pstate->ht_scriptptr = pstate->ht_file.data + 3;
pstate->ht_scriptlen = pstate->ht_file.len - 3;
if (*(pstate->ht_scriptptr - 1) == ISO_COLON)
{
if (httpd_open(pstate->ht_scriptptr + 1,
&pstate->ht_file) != OK)
{
return ERROR;
}
status = httpd_send_datachunk(pstate->ht_sockfd,
pstate->ht_file.data,
pstate->ht_file.len,
chunked_http_tx);
DEBUGASSERT(status >= 0);
UNUSED(status);
httpd_close(&pstate->ht_file);
}
else
{
httpd_cgifunction f;
f = httpd_cgi(pstate->ht_scriptptr);
if (f != NULL)
{
f(pstate, pstate->ht_scriptptr);
}
}
next_scriptstate(pstate);
/* The script is over, so we reset the pointers and continue
* sending the rest of the file
*/
pstate->ht_file.data = pstate->ht_scriptptr;
pstate->ht_file.len = pstate->ht_scriptlen;
}
else
{
/* See if we find the start of script marker in the block of HTML
* to be sent
*/
if (pstate->ht_file.len > HTTPD_IOBUFFER_SIZE)
{
len = HTTPD_IOBUFFER_SIZE;
}
else
{
len = pstate->ht_file.len;
}
if (*pstate->ht_file.data == ISO_PERCENT)
{
ptr = strchr(pstate->ht_file.data + 1, ISO_PERCENT);
}
else
{
ptr = strchr(pstate->ht_file.data, ISO_PERCENT);
}
if (ptr != NULL && ptr != pstate->ht_file.data)
{
len = (int)(ptr - pstate->ht_file.data);
if (len >= HTTPD_IOBUFFER_SIZE)
{
len = HTTPD_IOBUFFER_SIZE;
}
}
status = httpd_send_datachunk(pstate->ht_sockfd,
pstate->ht_file.data,
len, chunked_http_tx);
DEBUGASSERT(status >= 0);
UNUSED(status);
pstate->ht_file.data += len;
pstate->ht_file.len -= len;
}
}
#if defined(CONFIG_NETUTILS_HTTPD_ENABLE_CHUNKED_ENCODING)
/* Chunked encoding terminator */
status = httpd_send_datachunk(pstate->ht_sockfd, 0, 0, chunked_http_tx);
DEBUGASSERT(status >= 0);
UNUSED(status);
#endif
return OK;
}
#endif
static int send_chunk(struct httpd_state *pstate, const char *buf, int len)
{
int ret;
do
{
httpd_dumpbuffer("Outgoing chunk", buf, len);
ret = send(pstate->ht_sockfd, buf, len, 0);
if (ret < 0)
{
return ERROR;
}
buf += ret;
len -= ret;
}
while (len > 0);
return OK;
}
static int send_headers(struct httpd_state *pstate, int status, int len)
{
const char *mime;
const char *ptr;
char contentlen[HTTPD_MAX_CONTENTLEN] =
{
0
};
char header[HTTPD_MAX_HEADERLEN];
int hdrlen;
int i;
static const struct
{
const char *ext;
const char *mime;
}
a[] =
{
#ifndef CONFIG_NETUTILS_HTTPD_SCRIPT_DISABLE
{
"shtml", "text/html"
},
#endif
{
"html", "text/html"
},
{
"css", "text/css"
},
{
"txt", "text/plain"
},
{
"js", "text/javascript"
},
{
"png", "image/png"
},
{
"gif", "image/gif"
},
{
"jpeg", "image/jpeg"
},
{
"jpg", "image/jpeg"
},
{
"mp3", "audio/mpeg"
}
};
ptr = strrchr(pstate->ht_filename, ISO_PERIOD);
if (ptr == NULL)
{
mime = "application/octet-stream";
}
else
{
mime = "text/plain";
for (i = 0; i < sizeof a / sizeof *a; i++)
{
if (strncmp(a[i].ext, ptr + 1, strlen(a[i].ext)) == 0)
{
mime = a[i].mime;
break;
}
}
}
#ifdef CONFIG_NETUTILS_HTTPD_DIRLIST
if (false == httpd_is_file(pstate->ht_filename))
{
/* we assume that it's a directory */
mime = "text/html";
}
#endif
if (len >= 0)
{
snprintf(contentlen, HTTPD_MAX_CONTENTLEN,
"Content-Length: %d\r\n", len);
}
else
{
#ifndef CONFIG_NETUTILS_HTTPD_KEEPALIVE_DISABLE
/* Length unknown ahead of time */
pstate->ht_keepalive = false;
#endif
#if defined(CONFIG_NETUTILS_HTTPD_ENABLE_CHUNKED_ENCODING)
/* Turn on chunked encoding */
snprintf(contentlen, HTTPD_MAX_CONTENTLEN,
"Transfer-Encoding: chunked\r\n");
pstate->ht_chunked = true;
#endif
}
if (status == 413)
{
/* TODO: here we "SHOULD" include a Retry-After header */
}
/* Construct the header.
*
* REVISIT: Wouldn't asprintf be a better option than a large stack
* array?
*/
hdrlen = snprintf(header, HTTPD_MAX_HEADERLEN,
"HTTP/1.0 %d %s\r\n"
#ifndef CONFIG_NETUTILS_HTTPD_SERVERHEADER_DISABLE
"Server: uIP/NuttX http://nuttx.org/\r\n"
#endif
"Connection: %s\r\n"
"Content-type: %s\r\n"
"%s"
"\r\n",
status,
status >= 400 ? "Error" : "OK",
#ifndef CONFIG_NETUTILS_HTTPD_KEEPALIVE_DISABLE
pstate->ht_keepalive ? "keep-alive" : "close",
#else
"close",
#endif
mime,
contentlen
);
return send_chunk(pstate, header, hdrlen);
}
static int httpd_senderror(struct httpd_state *pstate, int status)
{
int ret;
char msg[10 + 1];
ninfo("[%d] sending error '%d'\n", pstate->ht_sockfd, status);
if (status < 400 || status >= 600)
{
status = 500;
}
#ifndef CONFIG_NETUTILS_HTTPD_KEEPALIVE_DISABLE
if (status != 404)
{
pstate->ht_keepalive = false;
}
#endif
snprintf(pstate->ht_filename, sizeof pstate->ht_filename,
"%s/%d.html", CONFIG_NETUTILS_HTTPD_ERRPATH, status);
ret = httpd_openindex(pstate);
if (send_headers(pstate, status,
ret == OK ? pstate->ht_file.len : sizeof msg - 1) != OK)
{
return ERROR;
}
if (ret != OK)
{
snprintf(msg, sizeof msg, "Error %d\n", status);
ret = send_chunk(pstate, msg, sizeof msg - 1);
}
else
{
#ifdef CONFIG_NETUTILS_HTTPD_CLASSIC
ret = send_chunk(pstate, pstate->ht_file.data, pstate->ht_file.len);
#else
#ifdef CONFIG_NETUTILS_HTTPD_SENDFILE
ret = httpd_sendfile_send(pstate->ht_sockfd, &pstate->ht_file);
#endif
#endif
httpd_close(&pstate->ht_file);
}
return ret;
}
static int httpd_sendfile(struct httpd_state *pstate)
{
#ifndef CONFIG_NETUTILS_HTTPD_SCRIPT_DISABLE
char *ptr;
#endif
int ret = ERROR;
pstate->ht_sndlen = 0;
ninfo("[%d] sending file '%s'\n", pstate->ht_sockfd, pstate->ht_filename);
#ifdef CONFIG_NETUTILS_HTTPD_CGIPATH
{
httpd_cgifunction f;
f = httpd_cgi(pstate->ht_filename);
if (f != NULL)
{
#ifndef CONFIG_NETUTILS_HTTPD_KEEPALIVE_DISABLE
pstate->ht_keepalive = false;
#endif
f(pstate, pstate->ht_filename);
return OK;
}
}
#endif
if (httpd_openindex(pstate) != OK)
{
nwarn("WARNING: [%d] '%s' not found\n",
pstate->ht_sockfd, pstate->ht_filename);
return httpd_senderror(pstate, 404);
}
#ifndef CONFIG_NETUTILS_HTTPD_SCRIPT_DISABLE
ptr = strchr(pstate->ht_filename, ISO_PERIOD);
if (ptr != NULL &&
strncmp(ptr, ".shtml", strlen(".shtml")) == 0)
{
#ifndef CONFIG_NETUTILS_HTTPD_KEEPALIVE_DISABLE
pstate->ht_keepalive = false;
#endif
if (send_headers(pstate, 200, -1) != OK)
{
goto done;
}
ret = handle_script(pstate);
goto done;
}
#endif
#ifdef CONFIG_NETUTILS_HTTPD_DIRLIST
if (send_headers(pstate, 200, -1) != OK)
{
goto done;
}
#else
if (send_headers(pstate, pstate->ht_file.len == 0 ? 204 : 200,
pstate->ht_file.len) != OK)
{
goto done;
}
#endif
#ifdef CONFIG_NETUTILS_HTTPD_CLASSIC
ret = send_chunk(pstate, pstate->ht_file.data, pstate->ht_file.len);
#else
#ifdef CONFIG_NETUTILS_HTTPD_SENDFILE
ret = httpd_sendfile_send(pstate->ht_sockfd, &pstate->ht_file);
#endif
#endif
done:
httpd_close(&pstate->ht_file);
return ret;
}
static inline int httpd_parse(struct httpd_state *pstate)
{
char *o;
enum
{
STATE_METHOD,
STATE_HEADER,
STATE_BODY
} state;
state = STATE_METHOD;
o = pstate->ht_buffer;
do
{
char *start;
char *end;
if (o == pstate->ht_buffer + sizeof pstate->ht_buffer)
{
nerr("ERROR: ht_buffer overflow\n");
return 413;
}
{
ssize_t r;
r = recv(pstate->ht_sockfd, o,
sizeof pstate->ht_buffer - (o - pstate->ht_buffer), 0);
if (r == 0)
{
nwarn("WARNING: [%d] connection lost\n", pstate->ht_sockfd);
return ERROR;
}
#if CONFIG_NETUTILS_HTTPD_TIMEOUT > 0
if (r == -1 && errno == EWOULDBLOCK)
{
nwarn("WARNING: recv timeout\n");
return 408;
}
#endif
if (r == -1)
{
nerr("ERROR: [%d] recv failed: %d\n",
pstate->ht_sockfd, errno);
return 400;
}
o += r;
}
/* Here o marks the end of the total block currently awaiting
* processing. There may be multiple lines in a block; next we deal
* with each in turn.
*/
for (start = pstate->ht_buffer;
(end = memchr(start, '\r', o - start)), end != NULL;
start = end)
{
*end = '\0';
end++;
/* Here start and end are a single line within the current block */
httpd_dumpbuffer("Incoming HTTP line", start, end - start);
if (*end != '\n')
{
nwarn("WARNING: expected CRLF\n");
return 400;
}
end++;
switch (state)
{
char *v;
case STATE_METHOD:
if (0 != strncmp(start, "GET ", 4))
{
nwarn("WARNING: method not supported\n");
return 501;
}
start += 4;
v = start + strcspn(start, " ");
if (0 != strcmp(v, " HTTP/1.0") && 0 != strcmp(v, " HTTP/1.1"))
{
nwarn("WARNING: HTTP version not supported\n");
return 505;
}
/* TODO: url decoding */
if (v - start >= sizeof pstate->ht_filename)
{
nerr("ERROR: ht_filename overflow\n");
return 414;
}
*v = '\0';
strcpy(pstate->ht_filename, start);
state = STATE_HEADER;
break;
case STATE_HEADER:
if (*start == '\0')
{
state = STATE_BODY;
break;
}
v = start + strcspn(start, ":");
if (*v != '\0')
{
*v = '\0', v++;
v += strspn(v, ": ");
}
if (*start == '\0' || *v == '\0')
{
nwarn("WARNING: header parse error\n");
return 400;
}
ninfo("[%d] Request header %s: %s\n",
pstate->ht_sockfd, start, v);
if (0 == strcasecmp(start, "Content-Length") && 0 != atoi(v))
{
nwarn("WARNING: non-zero request length\n");
return 413;
}
#ifndef CONFIG_NETUTILS_HTTPD_KEEPALIVE_DISABLE
else if (0 == strcasecmp(start, "Connection") &&
0 == strcasecmp(v, "keep-alive"))
{
pstate->ht_keepalive = true;
}
#endif
break;
case STATE_BODY:
/* Not implemented */
break;
}
}
/* Shuffle down for the next block */
memmove(pstate->ht_buffer, start, o - start);
o -= (start - pstate->ht_buffer);
}
while (state != STATE_BODY);
#ifdef CONFIG_NETUTILS_HTTPD_CLASSIC
if (0 == strcmp(pstate->ht_filename, "/"))
{
strncpy(pstate->ht_filename, "/" CONFIG_NETUTILS_HTTPD_INDEX,
strlen("/" CONFIG_NETUTILS_HTTPD_INDEX));
}
#endif
ninfo("[%d] Filename: %s\n", pstate->ht_sockfd, pstate->ht_filename);
return 200;
}
/****************************************************************************
* Name: httpd_handler
*
* Description:
* Each time a new connection to port 80 is made, a new thread is created
* that begins at this entry point. There should be exactly one argument
* and it should be the socket descriptor (+1).
*
****************************************************************************/
static void *httpd_handler(void *arg)
{
struct httpd_state *pstate =
(struct httpd_state *)malloc(sizeof(struct httpd_state));
int sockfd = (intptr_t)arg;
ninfo("[%d] Started\n", sockfd);
/* Verify that the state structure was successfully allocated */
if (pstate)
{
int status;
/* Re-initialize the thread state structure */
memset(pstate, 0, sizeof(struct httpd_state));
pstate->ht_sockfd = sockfd;
#ifndef CONFIG_NETUTILS_HTTPD_KEEPALIVE_DISABLE
do
{
pstate->ht_keepalive = false;
#endif
/* Then handle the next httpd command */
status = httpd_parse(pstate);
if (status >= 400)
{
httpd_senderror(pstate, status);
}
else
{
httpd_sendfile(pstate);
}
#ifndef CONFIG_NETUTILS_HTTPD_KEEPALIVE_DISABLE
}
while (pstate->ht_keepalive);
#endif
/* End of command processing -- Clean up and exit */
free(pstate);
}
/* Exit the task */
ninfo("[%d] Exiting\n", sockfd);
close(sockfd);
return NULL;
}
#ifdef CONFIG_NETUTILS_HTTPD_SINGLECONNECT
static void single_server(uint16_t portno, pthread_startroutine_t handler,
int stacksize)
{
struct sockaddr_in myaddr;
socklen_t addrlen;
int listensd;
int acceptsd;
#ifdef CONFIG_NET_SOLINGER
struct linger ling;
#endif
#if CONFIG_NETUTILS_HTTPD_TIMEOUT > 0
struct timeval tv;
#endif
listensd = netlib_listenon(portno);
if (listensd < 0)
{
return;
}
/* Begin serving connections */
for (; ; )
{
addrlen = sizeof(struct sockaddr_in);
acceptsd = accept(listensd, (FAR struct sockaddr *)&myaddr, &addrlen);
if (acceptsd < 0)
{
nerr("ERROR: accept failure: %d\n", errno);
break;
}
ninfo("Connection accepted -- serving sd=%d\n", acceptsd);
/* Configure to "linger" until all data is sent
* when the socket is closed
*/
#ifdef CONFIG_NET_SOLINGER
ling.l_onoff = 1;
ling.l_linger = 30; /* timeout is seconds */
if (setsockopt(acceptsd, SOL_SOCKET, SO_LINGER, &ling,
sizeof(struct linger)) < 0)
{
close(acceptsd);
nerr("ERROR: setsockopt SO_LINGER failure: %d\n", errno);
break;
}
#endif
#if CONFIG_NETUTILS_HTTPD_TIMEOUT > 0
/* Set up a receive timeout */
tv.tv_sec = CONFIG_NETUTILS_HTTPD_TIMEOUT;
tv.tv_usec = 0;
if (setsockopt(acceptsd, SOL_SOCKET, SO_RCVTIMEO, &tv,
sizeof(struct timeval)) < 0)
{
close(acceptsd);
nerr("ERROR: setsockopt SO_RCVTIMEO failure: %d\n", errno);
break;
}
#endif
/* Handle the request. This blocks until complete. */
httpd_handler((FAR void *)acceptsd);
}
/* Close the sockets */
close(acceptsd);
close(listensd);
}
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: httpd_listen
*
* Description:
* This is the main processing thread for the webserver. It never returns
* unless an error occurs
*
****************************************************************************/
int httpd_listen(void)
{
/* Execute httpd_handler on each connection to port 80 */
#ifdef CONFIG_NETUTILS_HTTPD_SINGLECONNECT
single_server(HTONS(80), httpd_handler, CONFIG_NETUTILS_HTTPDSTACKSIZE);
#else
netlib_server(HTONS(80), httpd_handler, CONFIG_NETUTILS_HTTPDSTACKSIZE);
#endif
/* the server accept loop only returns on errors */
return ERROR;
}
/****************************************************************************
* Name: httpd_init
*
* Description:
* This function initializes the web server and should be called at system
* boot-up.
*
****************************************************************************/
void httpd_init(void)
{
#ifdef CONFIG_NETUTILS_HTTPD_CLASSIC
httpd_fs_init();
#endif
}
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