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709c21c48c
This code adds a new Bufferevent type that is only compiled when the openssl library is present. It supports using an SSL object and an event alert mechanism, which can either be an fd or an underlying bufferevent. There is still more work to do: the unit tests are incomplete, and we need to support flush and shutdown much better. Sometimes events are generated needlessly: this will hose performance. There's a new encrypting proxy in sample/le-proxy.c. This code has only been tested on OSX, and nowhere else. svn:r1382
140 lines
5.0 KiB
C
140 lines
5.0 KiB
C
/*
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* Copyright (c) 2007-2009 Niels Provos and Nick Mathewson
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _EVENT_UTIL_INTERNAL_H
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#define _EVENT_UTIL_INTERNAL_H
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#include "event-config.h"
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#include <errno.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* If we need magic to say "inline", get it for free internally. */
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#ifdef _EVENT_inline
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#define inline _EVENT_inline
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#endif
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#ifdef _EVENT___func__
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#define __func__ _EVENT___func__
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#endif
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/* A good no-op to use in macro definitions. */
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#define _EVUTIL_NIL_STMT ((void)0)
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/* Internal use only: macros to match patterns of error codes in a
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cross-platform way. We need these macros because of two historical
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reasons: first, nonblocking IO functions are generally written to give an
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error on the "blocked now, try later" case, so sometimes an error from a
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read, write, connect, or accept means "no error; just wait for more
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data," and we need to look at the error code. Second, Windows defines
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a different set of error codes for sockets. */
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#ifndef WIN32
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/* True iff e is an error that means a read/write operation can be retried. */
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#define EVUTIL_ERR_RW_RETRIABLE(e) \
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((e) == EINTR || (e) == EAGAIN)
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/* True iff e is an error that means an accept can be retried. */
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#define EVUTIL_ERR_CONNECT_RETRIABLE(e) \
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((e) == EINTR || (e) == EINPROGRESS)
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/* True iff e is an error that means a connect can be retried. */
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#define EVUTIL_ERR_ACCEPT_RETRIABLE(e) \
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((e) == EINTR || (e) == EAGAIN || (e) == ECONNABORTED)
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#else
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#define EVUTIL_ERR_RW_RETRIABLE(e) \
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((e) == WSAEWOULDBLOCK || \
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(e) == WSAEINTR)
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#define EVUTIL_ERR_CONNECT_RETRIABLE(e) \
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((e) == WSAEWOULDBLOCK || \
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(e) == WSAEINTR || \
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(e) == WSAEINPROGRESS || \
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(e) == WSAEINVAL)
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#define EVUTIL_ERR_ACCEPT_RETRIABLE(e) \
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EVUTIL_ERR_RW_RETRIABLE(e)
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#endif
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#ifdef _EVENT_socklen_t
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#define socklen_t _EVENT_socklen_t
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#endif
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/* Locale-independent replacements for some ctypes functions. Use these
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* when you care about ASCII's notion of character types, because you are about
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* to send those types onto the wire.
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*/
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#define DECLARE_CTYPE_FN(name) \
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static int EVUTIL_##name(char c); \
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extern const ev_uint32_t EVUTIL_##name##_TABLE[]; \
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static inline int EVUTIL_##name(char c) { \
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ev_uint8_t u = c; \
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return !!(EVUTIL_##name##_TABLE[(u >> 5) & 7] & (1 << (u & 31))); \
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}
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DECLARE_CTYPE_FN(ISALPHA)
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DECLARE_CTYPE_FN(ISALNUM)
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DECLARE_CTYPE_FN(ISSPACE)
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DECLARE_CTYPE_FN(ISDIGIT)
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DECLARE_CTYPE_FN(ISXDIGIT)
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DECLARE_CTYPE_FN(ISPRINT)
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DECLARE_CTYPE_FN(ISLOWER)
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DECLARE_CTYPE_FN(ISUPPER)
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extern const char EVUTIL_TOUPPER_TABLE[];
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extern const char EVUTIL_TOLOWER_TABLE[];
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#define EVUTIL_TOLOWER(c) (EVUTIL_TOLOWER_TABLE[(ev_uint8_t)c])
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#define EVUTIL_TOUPPER(c) (EVUTIL_TOUPPER_TABLE[(ev_uint8_t)c])
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int evutil_strcasecmp(const char *, const char *);
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int evutil_strncasecmp(const char *, const char *, size_t);
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/** Helper macro. If we know that a given pointer points to a field in a
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structure, return a pointer to the structure itself. Used to implement
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our half-baked C OO. Example:
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struct subtype {
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int x;
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struct supertype common;
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int y;
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};
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...
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void fn(struct supertype *super) {
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struct subtype *sub = EVUTIL_UPCAST(super, struct subtype, common);
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...
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}
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*/
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#define EVUTIL_UPCAST(ptr, type, field) \
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((type *)((char*)ptr) - evutil_offsetof(type, field))
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int evutil_socket_connect(evutil_socket_t *fd_ptr, struct sockaddr *sa, int socklen);
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#ifdef __cplusplus
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}
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#endif
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#endif
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