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/*
* Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#ifndef OSSL_HTTP_SERVER_H
# define OSSL_HTTP_SERVER_H
# include "apps.h"
# ifndef HAVE_FORK
# if defined(OPENSSL_SYS_VMS) || defined(OPENSSL_SYS_WINDOWS)
# define HAVE_FORK 0
# else
# define HAVE_FORK 1
# endif
# endif
# if HAVE_FORK
# undef NO_FORK
# else
# define NO_FORK
# endif
# if !defined(NO_FORK) && !defined(OPENSSL_NO_SOCK) \
&& !defined(OPENSSL_NO_POSIX_IO)
# define HTTP_DAEMON
# include <sys/types.h>
# include <sys/wait.h>
# include <syslog.h>
# include <signal.h>
# define MAXERRLEN 1000 /* limit error text sent to syslog to 1000 bytes */
# else
# undef LOG_INFO
# undef LOG_WARNING
# undef LOG_ERR
# define LOG_INFO 0
# define LOG_WARNING 1
# define LOG_ERR 2
# endif
/*-
* Log a message to syslog if multi-threaded HTTP_DAEMON, else to bio_err
* prog: the name of the current app
* level: the severity of the message, e.g., LOG_ERR
* fmt: message with potential extra parameters like with printf()
* returns nothing
*/
void log_message(const char *prog, int level, const char *fmt, ...);
# ifndef OPENSSL_NO_SOCK
/*-
* Initialize an HTTP server by setting up its listening BIO
* prog: the name of the current app
* port: the port to listen on
* returns a BIO for accepting requests, NULL on error
*/
BIO *http_server_init_bio(const char *prog, const char *port);
/*-
* Accept an ASN.1-formatted HTTP request
* it: the expected request ASN.1 type
* preq: pointer to variable where to place the parsed request
* pcbio: pointer to variable where to place the BIO for sending the response to
* ppath: pointer to variable where to place the request path, or NULL
* acbio: the listening bio (typically as returned by http_server_init_bio())
* prog: the name of the current app
* accept_get: whether to accept GET requests (in addition to POST requests)
* timeout: connection timeout (in seconds), or 0 for none/infinite
* returns 0 in case caller should retry, then *preq == *ppath == *pcbio == NULL
* returns -1 on fatal error; also then holds *preq == *ppath == *pcbio == NULL
* returns 1 otherwise. In this case it is guaranteed that *pcbio != NULL while
* *ppath == NULL and *preq == NULL if and only if the request is invalid,
* On return value 1 the caller is responsible for sending an HTTP response,
* using http_server_send_asn1_resp() or http_server_send_status().
* The caller must free any non-NULL *preq, *ppath, and *pcbio pointers.
*/
int http_server_get_asn1_req(const ASN1_ITEM *it, ASN1_VALUE **preq,
char **ppath, BIO **pcbio, BIO *acbio,
const char *prog, int accept_get, int timeout);
/*-
* Send an ASN.1-formatted HTTP response
* cbio: destination BIO (typically as returned by http_server_get_asn1_req())
* note: cbio should not do an encoding that changes the output length
* content_type: string identifying the type of the response
* it: the response ASN.1 type
* valit: the response ASN.1 type
* resp: the response to send
* returns 1 on success, 0 on failure
*/
int http_server_send_asn1_resp(BIO *cbio, const char *content_type,
const ASN1_ITEM *it, const ASN1_VALUE *resp);
/*-
* Send a trivial HTTP response, typically to report an error or OK
* cbio: destination BIO (typically as returned by http_server_get_asn1_req())
* status: the status code to send
* reason: the corresponding human-readable string
* returns 1 on success, 0 on failure
*/
int http_server_send_status(BIO *cbio, int status, const char *reason);
# endif
# ifdef HTTP_DAEMON
extern int multi;
extern int acfd;
void socket_timeout(int signum);
void spawn_loop(const char *prog);
# endif
#endif
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