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Diffstat (limited to 'src/core/transport/chttp2/hpack_parser.h')
| -rw-r--r-- | src/core/transport/chttp2/hpack_parser.h | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/src/core/transport/chttp2/hpack_parser.h b/src/core/transport/chttp2/hpack_parser.h new file mode 100644 index 0000000000..cf68042fbd --- /dev/null +++ b/src/core/transport/chttp2/hpack_parser.h @@ -0,0 +1,108 @@ +/* + * + * Copyright 2014, Google Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * 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. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT + * OWNER 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 __GRPC_INTERNAL_TRANSPORT_CHTTP2_HPACK_PARSER_H__ +#define __GRPC_INTERNAL_TRANSPORT_CHTTP2_HPACK_PARSER_H__ + +#include <stddef.h> + +#include <grpc/support/port_platform.h> +#include "src/core/transport/chttp2/frame.h" +#include "src/core/transport/chttp2/hpack_table.h" +#include "src/core/transport/metadata.h" + +typedef struct grpc_chttp2_hpack_parser grpc_chttp2_hpack_parser; + +typedef int (*grpc_chttp2_hpack_parser_state)(grpc_chttp2_hpack_parser *p, + const gpr_uint8 *beg, + const gpr_uint8 *end); + +typedef struct { + char *str; + gpr_uint32 length; + gpr_uint32 capacity; +} grpc_chttp2_hpack_parser_string; + +struct grpc_chttp2_hpack_parser { + /* user specified callback for each header output */ + void (*on_header)(void *user_data, grpc_mdelem *md); + void *on_header_user_data; + + /* current parse state - or a function that implements it */ + grpc_chttp2_hpack_parser_state state; + /* future states dependent on the opening op code */ + const grpc_chttp2_hpack_parser_state *next_state; + /* the value we're currently parsing */ + union { + gpr_uint32 *value; + grpc_chttp2_hpack_parser_string *str; + } parsing; + /* string parameters for each chunk */ + grpc_chttp2_hpack_parser_string key; + grpc_chttp2_hpack_parser_string value; + /* parsed index */ + gpr_uint32 index; + /* length of source bytes for the currently parsing string */ + gpr_uint32 strlen; + /* number of source bytes read for the currently parsing string */ + gpr_uint32 strgot; + /* huffman decoding state */ + gpr_uint16 huff_state; + /* is the current string huffman encoded? */ + gpr_uint8 huff; + /* set by higher layers, used by grpc_chttp2_header_parser_parse to signal + it should append a metadata boundary at the end of frame */ + gpr_uint8 is_boundary; + gpr_uint8 is_eof; + + /* hpack table */ + grpc_chttp2_hptbl table; +}; + +void grpc_chttp2_hpack_parser_init(grpc_chttp2_hpack_parser *p, + grpc_mdctx *mdctx); +void grpc_chttp2_hpack_parser_destroy(grpc_chttp2_hpack_parser *p); + +void grpc_chttp2_hpack_parser_set_has_priority(grpc_chttp2_hpack_parser *p); + +/* returns 1 on success, 0 on error */ +int grpc_chttp2_hpack_parser_parse(grpc_chttp2_hpack_parser *p, + const gpr_uint8 *beg, const gpr_uint8 *end); + +/* wraps grpc_chttp2_hpack_parser_parse to provide a frame level parser for + the transport */ +grpc_chttp2_parse_error grpc_chttp2_header_parser_parse( + void *hpack_parser, grpc_chttp2_parse_state *state, gpr_slice slice, + int is_last); + +#endif /* __GRPC_INTERNAL_TRANSPORT_CHTTP2_HPACK_PARSER_H__ */ |