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incubator-nuttx/netutils/thttpd/libhttpd.h

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/****************************************************************************
* netutils/thttpd/libhttpd.h
* HTTP Protocol Library Definitions
*
* Copyright (C) 2009 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* Derived from the file of the same name in the original THTTPD package:
*
* Copyright © 1995,1998,1999,2000,2001 by Jef Poskanzer <jef@mail.acme.com>.
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
****************************************************************************/
#ifndef __NETUTILS_THTTPD_LIBHTTPD_H
#define __NETUTILS_THTTPD_LIBHTTPD_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <stdint.h>
#include <stdbool.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <time.h>
#include "config.h"
#ifdef CONFIG_THTTPD
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* A few convenient defines. */
#ifndef MAX
# define MAX(a,b) ((a) > (b) ? (a) : (b))
#endif
#ifndef MIN
# define MIN(a,b) ((a) < (b) ? (a) : (b))
#endif
/* Enable special instrumentation to track down "400 Bad Request" problems */
#undef CONFIG_THTTPD_BADREQUEST /* Define to enable "Bad Request" instrumentation */
#ifdef CONFIG_THTTPD_BADREQUEST
# if !defined(CONFIG_DEBUG_VERBOSE) || !defined(CONFIG_DEBUG_NET)
# undef CONFIG_THTTPD_BADREQUEST
# else
# define BADREQUEST(s) nvdbg("Bad Request: \"%s\"\n", s)
# endif
#endif
#ifndef CONFIG_THTTPD_BADREQUEST
# undef BADREQUEST
# define BADREQUEST(s)
#endif
/* Enable special instrumentation to track down "501 Not Implemented" problems */
#undef CONFIG_THTTPD_NOTIMPLEMENTED /* Define to enable "Not Implemented" instrumentation */
#ifdef CONFIG_THTTPD_NOTIMPLEMENTED
# if !defined(CONFIG_DEBUG_VERBOSE) || !defined(CONFIG_DEBUG_NET)
# undef CONFIG_THTTPD_NOTIMPLEMENTED
# else
# define NOTIMPLEMENTED(s) nvdbg("Not Implemented: \"%s\"\n", s)
# endif
#endif
#ifndef CONFIG_THTTPD_NOTIMPLEMENTED
# undef NOTIMPLEMENTED
# define NOTIMPLEMENTED(s)
#endif
/* Enable special instrumentation to track down "500 Internal Error" problems */
#undef CONFIG_THTTPD_INTERNALERROR /* Define to enable "Internal Error" instrumentation */
#ifdef CONFIG_THTTPD_INTERNALERROR
# if !defined(CONFIG_DEBUG_VERBOSE) || !defined(CONFIG_DEBUG_NET)
# undef CONFIG_THTTPD_INTERNALERROR
# else
# define INTERNALERROR(s) nvdbg("Internal Error: \"%s\"\n", s)
# endif
#endif
#ifndef CONFIG_THTTPD_INTERNALERROR
# undef INTERNALERROR
# define INTERNALERROR(s)
#endif
/* Methods */
#define METHOD_UNKNOWN 0
#define METHOD_GET 1
#define METHOD_HEAD 2
#define METHOD_POST 3
/* States for checked_state. */
#define CHST_FIRSTWORD 0
#define CHST_FIRSTWS 1
#define CHST_SECONDWORD 2
#define CHST_SECONDWS 3
#define CHST_THIRDWORD 4
#define CHST_THIRDWS 5
#define CHST_LINE 6
#define CHST_LF 7
#define CHST_CR 8
#define CHST_CRLF 9
#define CHST_CRLFCR 10
#define CHST_BOGUS 11
#define GC_FAIL 0
#define GC_OK 1
#define GC_NO_MORE 2
#define GR_NO_REQUEST 0
#define GR_GOT_REQUEST 1
#define GR_BAD_REQUEST 2
/****************************************************************************
* Public Type Definitions
****************************************************************************/
/* A multi-family sockaddr. */
#ifdef CONFIG_NET_IPv6
typedef struct sockaddr_in6 httpd_sockaddr;
#else
typedef struct sockaddr_in httpd_sockaddr;
#endif
/* A server. */
typedef struct
{
char *hostname;
int cgi_count;
int listen_fd;
} httpd_server;
/* A connection. */
typedef struct
{
int initialized;
httpd_server *hs;
httpd_sockaddr client_addr;
char *read_buf;
size_t read_size, read_idx, checked_idx;
int checked_state;
int method;
off_t bytes_to_send;
off_t bytes_sent;
char *encodedurl;
char *decodedurl;
char *protocol;
char *origfilename;
char *expnfilename;
char *encodings;
char *pathinfo;
char *query;
char *referer;
char *useragent;
char *accept;
char *accepte;
char *acceptl;
char *cookie;
char *contenttype;
char *reqhost;
char *hdrhost;
char *hostdir;
char *authorization;
char *remoteuser;
size_t maxdecodedurl, maxorigfilename, maxexpnfilename, maxencodings,
maxpathinfo, maxquery, maxaccept, maxaccepte, maxreqhost, maxhostdir,
maxremoteuser, maxresponse;
#ifdef CONFIG_THTTPD_TILDE_MAP2
char *altdir;
size_t maxaltdir;
#endif
time_t if_modified_since, range_if;
size_t contentlength;
char *type; /* not malloc()ed */
#ifdef CONFIG_THTTPD_VHOST
char *vhostname; /* not malloc()ed */
#endif
bool mime_flag;
bool one_one; /* HTTP/1.1 or better */
bool got_range;
bool tildemapped; /* this connection got tilde-mapped */
bool keep_alive;
bool should_linger;
int conn_fd; /* Connection to the client */
int file_fd; /* Descriptor for open, outgoing file */
off_t range_start; /* File range start from Range= */
off_t range_end; /* File range end from Range= */
struct stat sb;
/* This is the I/O buffer that is used to buffer portions of outgoing files */
uint16_t buflen; /* Index to first valid data in buffer */
uint8_t buffer[CONFIG_THTTPD_IOBUFFERSIZE];
} httpd_conn;
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
/* Initializes. Does the socket(), bind(), and listen(). Returns an
* httpd_server* which includes a socket fd that you can select() on.
* Return (httpd_server*) 0 on error.
*/
extern FAR httpd_server *httpd_initialize(FAR httpd_sockaddr *sa);
/* Call to unlisten/close socket(s) listening for new connections. */
extern void httpd_unlisten(httpd_server *hs);
/* Call to shut down. */
extern void httpd_terminate(httpd_server *hs);
/* When a listen fd is ready to read, call this. It does the accept() and
* returns an httpd_conn* which includes the fd to read the request from and
* write the response to. Returns an indication of whether the accept()
* failed, succeeded, or if there were no more connections to accept.
*
* In order to minimize malloc()s, the caller passes in the httpd_conn.
* The caller is also responsible for setting initialized to zero before the
* first call using each different httpd_conn.
*/
extern int httpd_get_conn(httpd_server *hs, int listen_fd, httpd_conn *hc);
/* Checks whether the data in hc->read_buf constitutes a complete request
* yet. The caller reads data into hc->read_buf[hc->read_idx] and advances
* hc->read_idx. This routine checks what has been read so far, using
* hc->checked_idx and hc->checked_state to keep track, and returns an
* indication of whether there is no complete request yet, there is a
* complete request, or there won't be a valid request due to a syntax error.
*/
extern int httpd_got_request(httpd_conn *hc);
/* Parses the request in hc->read_buf. Fills in lots of fields in hc,
* like the URL and the various headers.
*
* Returns -1 on error.
*/
extern int httpd_parse_request(httpd_conn *hc);
/* Starts sending data back to the client. In some cases (directories,
* CGI programs), finishes sending by itself - in those cases, hc->file_fd
* is negative. If there is more data to be sent, then hc->file_fd is a file
* stream for the file to send. If you don't have a current timeval
* handy just pass in 0.
*
* Returns -1 on error.
*/
extern int httpd_start_request(httpd_conn *hc, struct timeval *nowP);
/* Actually sends any buffered response text. */
extern void httpd_write_response(httpd_conn *hc);
/* Call this to close down a connection and free the data. */
extern void httpd_close_conn(httpd_conn *hc);
/* Call this to de-initialize a connection struct and *really* free the
* mallocced strings.
*/
extern void httpd_destroy_conn(httpd_conn *hc);
/* Send an error message back to the client. */
extern void httpd_send_err(httpd_conn *hc, int status, const char *title,
const char *extraheads, const char *form, const char *arg);
/* Generate a string representation of a method number. */
extern const char *httpd_method_str(int method);
/* Format a network socket to a string representation. */
extern char *httpd_ntoa(httpd_sockaddr * saP);
/* Set NDELAY mode on a socket. */
extern void httpd_set_ndelay(int fd);
/* Clear NDELAY mode on a socket. */
extern void httpd_clear_ndelay(int fd);
/* Read to requested buffer, accounting for interruptions and EOF */
extern int httpd_read(int fd, const void *buf, size_t nbytes);
/* Write the buffer completely, accounting for interruptions */
extern int httpd_write(int fd, const void *buf, size_t nbytes);
#endif /* CONFIG_THTTPD */
#endif /* __NETUTILS_THTTPD_LIBHTTPD_H */
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