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Diffstat (limited to 'include/haproxy/compression-t.h')
| -rw-r--r-- | include/haproxy/compression-t.h | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/include/haproxy/compression-t.h b/include/haproxy/compression-t.h new file mode 100644 index 0000000..b8f118b --- /dev/null +++ b/include/haproxy/compression-t.h @@ -0,0 +1,109 @@ +/* + * include/haproxy/compression-t.h + * This file defines everything related to compression. + * + * Copyright 2012 Exceliance, David Du Colombier <dducolombier@exceliance.fr> + William Lallemand <wlallemand@exceliance.fr> + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation, version 2.1 + * exclusively. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef _HAPROXY_COMP_T_H +#define _HAPROXY_COMP_T_H + +#if defined(USE_SLZ) +#ifdef USE_ZLIB +#error "Cannot build with both USE_SLZ and USE_ZLIB at the same time." +#endif +#include <import/slz.h> +#elif defined(USE_ZLIB) +#include <zlib.h> +#endif + +#include <haproxy/buf-t.h> + +/* Direction index */ + +#define COMP_DIR_REQ 0 +#define COMP_DIR_RES 1 + +/* Compression flags */ + +#define COMP_FL_OFFLOAD 0x00000001 /* Compression offload */ +#define COMP_FL_DIR_REQ 0x00000002 /* Compress requests */ +#define COMP_FL_DIR_RES 0x00000004 /* Compress responses */ + +struct comp { + struct comp_algo *algos_res; /* Algos available for response */ + struct comp_algo *algo_req; /* Algo to use for request */ + struct comp_type *types_req; /* Types to be compressed for requests */ + struct comp_type *types_res; /* Types to be compressed for responses */ + unsigned int flags; +}; + +struct comp_ctx { +#if defined(USE_SLZ) + struct slz_stream strm; + const void *direct_ptr; /* NULL or pointer to beginning of data */ + int direct_len; /* length of direct_ptr if not NULL */ + struct buffer queued; /* if not NULL, data already queued */ +#elif defined(USE_ZLIB) + z_stream strm; /* zlib stream */ + void *zlib_deflate_state; + void *zlib_window; + void *zlib_prev; + void *zlib_pending_buf; + void *zlib_head; +#endif + int cur_lvl; +}; + +/* Thanks to MSIE/IIS, the "deflate" name is ambiguous, as according to the RFC + * it's a zlib-wrapped deflate stream, but MSIE only understands a raw deflate + * stream. For this reason some people prefer to emit a raw deflate stream on + * "deflate" and we'll need two algos for the same name, they are distinguished + * with the config name. + */ +struct comp_algo { + char *cfg_name; /* config name */ + int cfg_name_len; + + char *ua_name; /* name for the user-agent */ + int ua_name_len; + + int (*init)(struct comp_ctx **comp_ctx, int level); + int (*add_data)(struct comp_ctx *comp_ctx, const char *in_data, int in_len, struct buffer *out); + int (*flush)(struct comp_ctx *comp_ctx, struct buffer *out); + int (*finish)(struct comp_ctx *comp_ctx, struct buffer *out); + int (*end)(struct comp_ctx **comp_ctx); + struct comp_algo *next; +}; + +struct comp_type { + char *name; + int name_len; + struct comp_type *next; +}; + + +#endif /* _HAPROXY_COMP_T_H */ + +/* + * Local variables: + * c-indent-level: 8 + * c-basic-offset: 8 + * End: + */ + |