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#ifndef librabbitmq_amqp_private_h
#define librabbitmq_amqp_private_h
/*
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License
* at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and
* limitations under the License.
*
* The Original Code is librabbitmq.
*
* The Initial Developer of the Original Code is VMware, Inc.
* Portions created by VMware are Copyright (c) 2007-2011 VMware, Inc.
*
* Portions created by Tony Garnock-Jones are Copyright (c) 2009-2010
* VMware, Inc. and Tony Garnock-Jones.
*
* All rights reserved.
*
* Alternatively, the contents of this file may be used under the terms
* of the GNU General Public License Version 2 or later (the "GPL"), in
* which case the provisions of the GPL are applicable instead of those
* above. If you wish to allow use of your version of this file only
* under the terms of the GPL, and not to allow others to use your
* version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the
* notice and other provisions required by the GPL. If you do not
* delete the provisions above, a recipient may use your version of
* this file under the terms of any one of the MPL or the GPL.
*
* ***** END LICENSE BLOCK *****
*/
#include "config.h"
/* Error numbering: Because of differences in error numbering on
* different platforms, we want to keep error numbers opaque for
* client code. Internally, we encode the category of an error
* (i.e. where its number comes from) in the top bits of the number
* (assuming that an int has at least 32 bits).
*/
#define ERROR_CATEGORY_MASK (1 << 29)
#define ERROR_CATEGORY_CLIENT (0 << 29) /* librabbitmq error codes */
#define ERROR_CATEGORY_OS (1 << 29) /* OS-specific error codes */
/* librabbitmq error codes */
#define ERROR_NO_MEMORY 1
#define ERROR_BAD_AMQP_DATA 2
#define ERROR_UNKNOWN_CLASS 3
#define ERROR_UNKNOWN_METHOD 4
#define ERROR_GETHOSTBYNAME_FAILED 5
#define ERROR_INCOMPATIBLE_AMQP_VERSION 6
#define ERROR_CONNECTION_CLOSED 7
#define ERROR_MAX 7
extern char *amqp_os_error_string(int err);
#include "socket.h"
/*
* Connection states: XXX FIX THIS
*
* - CONNECTION_STATE_INITIAL: The initial state, when we cannot be
* sure if the next thing we will get is the first AMQP frame, or a
* protocol header from the server.
*
* - CONNECTION_STATE_IDLE: The normal state between
* frames. Connections may only be reconfigured, and the
* connection's pools recycled, when in this state. Whenever we're
* in this state, the inbound_buffer's bytes pointer must be NULL;
* any other state, and it must point to a block of memory allocated
* from the frame_pool.
*
* - CONNECTION_STATE_HEADER: Some bytes of an incoming frame have
* been seen, but not a complete frame header's worth.
*
* - CONNECTION_STATE_BODY: A complete frame header has been seen, but
* the frame is not yet complete. When it is completed, it will be
* returned, and the connection will return to IDLE state.
*
*/
typedef enum amqp_connection_state_enum_ {
CONNECTION_STATE_IDLE = 0,
CONNECTION_STATE_INITIAL,
CONNECTION_STATE_HEADER,
CONNECTION_STATE_BODY
} amqp_connection_state_enum;
/* 7 bytes up front, then payload, then 1 byte footer */
#define HEADER_SIZE 7
#define FOOTER_SIZE 1
#define AMQP_PSEUDOFRAME_PROTOCOL_HEADER 'A'
typedef struct amqp_link_t_ {
struct amqp_link_t_ *next;
void *data;
} amqp_link_t;
struct amqp_connection_state_t_ {
amqp_pool_t frame_pool;
amqp_pool_t decoding_pool;
amqp_connection_state_enum state;
int channel_max;
int frame_max;
int heartbeat;
amqp_bytes_t inbound_buffer;
size_t inbound_offset;
size_t target_size;
amqp_bytes_t outbound_buffer;
int sockfd;
amqp_bytes_t sock_inbound_buffer;
size_t sock_inbound_offset;
size_t sock_inbound_limit;
amqp_link_t *first_queued_frame;
amqp_link_t *last_queued_frame;
amqp_rpc_reply_t most_recent_api_result;
};
static inline void *amqp_offset(void *data, size_t offset)
{
return (char *)data + offset;
}
/* This macro defines the encoding and decoding functions associated with a
simple type. */
#define DECLARE_CODEC_BASE_TYPE(bits, htonx, ntohx) \
\
static inline void amqp_e##bits(void *data, size_t offset, \
uint##bits##_t val) \
{ \
/* The AMQP data might be unaligned. So we encode and then copy the \
result into place. */ \
uint##bits##_t res = htonx(val); \
memcpy(amqp_offset(data, offset), &res, bits/8); \
} \
\
static inline uint##bits##_t amqp_d##bits(void *data, size_t offset) \
{ \
/* The AMQP data might be unaligned. So we copy the source value \
into a variable and then decode it. */ \
uint##bits##_t val; \
memcpy(&val, amqp_offset(data, offset), bits/8); \
return ntohx(val); \
} \
\
static inline int amqp_encode_##bits(amqp_bytes_t encoded, size_t *offset, \
uint##bits##_t input) \
\
{ \
size_t o = *offset; \
if ((*offset = o + bits / 8) <= encoded.len) { \
amqp_e##bits(encoded.bytes, o, input); \
return 1; \
} \
else { \
return 0; \
} \
} \
\
static inline int amqp_decode_##bits(amqp_bytes_t encoded, size_t *offset, \
uint##bits##_t *output) \
\
{ \
size_t o = *offset; \
if ((*offset = o + bits / 8) <= encoded.len) { \
*output = amqp_d##bits(encoded.bytes, o); \
return 1; \
} \
else { \
return 0; \
} \
}
#ifndef WORDS_BIGENDIAN
#define DECLARE_XTOXLL(func) \
static inline uint64_t func##ll(uint64_t val) \
{ \
union { \
uint64_t whole; \
uint32_t halves[2]; \
} u; \
uint32_t t; \
u.whole = val; \
t = u.halves[0]; \
u.halves[0] = func##l(u.halves[1]); \
u.halves[1] = func##l(t); \
return u.whole; \
}
#else
#define DECLARE_XTOXLL(func) \
static inline uint64_t func##ll(uint64_t val) \
{ \
union { \
uint64_t whole; \
uint32_t halves[2]; \
} u; \
u.whole = val; \
u.halves[0] = func##l(u.halves[0]); \
u.halves[1] = func##l(u.halves[1]); \
return u.whole; \
}
#endif
DECLARE_XTOXLL(hton)
DECLARE_XTOXLL(ntoh)
DECLARE_CODEC_BASE_TYPE(8, (uint8_t), (uint8_t))
DECLARE_CODEC_BASE_TYPE(16, htons, ntohs)
DECLARE_CODEC_BASE_TYPE(32, htonl, ntohl)
DECLARE_CODEC_BASE_TYPE(64, htonll, ntohll)
static inline int amqp_encode_bytes(amqp_bytes_t encoded, size_t *offset,
amqp_bytes_t input)
{
size_t o = *offset;
if ((*offset = o + input.len) <= encoded.len) {
memcpy(amqp_offset(encoded.bytes, o), input.bytes, input.len);
return 1;
}
else {
return 0;
}
}
static inline int amqp_decode_bytes(amqp_bytes_t encoded, size_t *offset,
amqp_bytes_t *output, size_t len)
{
size_t o = *offset;
if ((*offset = o + len) <= encoded.len) {
output->bytes = amqp_offset(encoded.bytes, o);
output->len = len;
return 1;
}
else {
return 0;
}
}
extern void amqp_abort(const char *fmt, ...);
#endif
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