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Diffstat (limited to '')
| -rw-r--r-- | addons/ot/include/parser.h | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/addons/ot/include/parser.h b/addons/ot/include/parser.h new file mode 100644 index 0000000..53e414b --- /dev/null +++ b/addons/ot/include/parser.h @@ -0,0 +1,172 @@ +/*** + * Copyright 2020 HAProxy Technologies + * + * This file is part of the HAProxy OpenTracing filter. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ +#ifndef _OPENTRACING_PARSER_H_ +#define _OPENTRACING_PARSER_H_ + +#define FLT_OT_SCOPE "OT" + +/* + * filter FLT_OT_OPT_NAME FLT_OT_OPT_FILTER_ID <FLT_OT_OPT_FILTER_ID_DEFAULT> FLT_OT_OPT_CONFIG <file> + */ +#define FLT_OT_OPT_NAME "opentracing" +#define FLT_OT_OPT_FILTER_ID "id" +#define FLT_OT_OPT_FILTER_ID_DEFAULT "ot-filter" +#define FLT_OT_OPT_CONFIG "config" + +#define FLT_OT_PARSE_SECTION_TRACER_ID "ot-tracer" +#define FLT_OT_PARSE_SECTION_GROUP_ID "ot-group" +#define FLT_OT_PARSE_SECTION_SCOPE_ID "ot-scope" + +#define FLT_OT_PARSE_SPAN_ROOT "root" +#define FLT_OT_PARSE_SPAN_REF_CHILD "child-of" +#define FLT_OT_PARSE_SPAN_REF_FOLLOWS "follows-from" +#define FLT_OT_PARSE_CTX_AUTONAME "-" +#define FLT_OT_PARSE_CTX_IGNORE_NAME '-' +#define FLT_OT_PARSE_CTX_USE_HEADERS "use-headers" +#define FLT_OT_PARSE_CTX_USE_VARS "use-vars" +#define FLT_OT_PARSE_OPTION_HARDERR "hard-errors" +#define FLT_OT_PARSE_OPTION_DISABLED "disabled" +#define FLT_OT_PARSE_OPTION_NOLOGNORM "dontlog-normal" + +/* + * A description of the macro arguments can be found in the structure + * flt_ot_parse_data definition + */ +#define FLT_OT_PARSE_TRACER_DEFINES \ + FLT_OT_PARSE_TRACER_DEF( ID, 0, CHAR, 2, 2, "ot-tracer", " <name>") \ + FLT_OT_PARSE_TRACER_DEF( ACL, 0, CHAR, 3, 0, "acl", " <name> <criterion> [flags] [operator] <value> ...") \ + FLT_OT_PARSE_TRACER_DEF( LOG, 0, CHAR, 2, 0, "log", " { global | <addr> [len <len>] [format <fmt>] <facility> [<level> [<minlevel>]] }") \ + FLT_OT_PARSE_TRACER_DEF( CONFIG, 0, NONE, 2, 2, "config", " <file>") \ + FLT_OT_PARSE_TRACER_DEF( PLUGIN, 0, NONE, 2, 2, "plugin", " <file>") \ + FLT_OT_PARSE_TRACER_DEF( GROUPS, 0, NONE, 2, 0, "groups", " <name> ...") \ + FLT_OT_PARSE_TRACER_DEF( SCOPES, 0, NONE, 2, 0, "scopes", " <name> ...") \ + FLT_OT_PARSE_TRACER_DEF( RATE_LIMIT, 0, NONE, 2, 2, "rate-limit", " <value>") \ + FLT_OT_PARSE_TRACER_DEF( OPTION, 0, NONE, 2, 2, "option", " { disabled | dontlog-normal | hard-errors }") \ + FLT_OT_PARSE_TRACER_DEF(DEBUG_LEVEL, 0, NONE, 2, 2, "debug-level", " <value>") + +#define FLT_OT_PARSE_GROUP_DEFINES \ + FLT_OT_PARSE_GROUP_DEF( ID, 0, CHAR, 2, 2, "ot-group", " <name>") \ + FLT_OT_PARSE_GROUP_DEF(SCOPES, 0, NONE, 2, 0, "scopes", " <name> ...") + +#ifdef USE_OT_VARS +# define FLT_OT_PARSE_SCOPE_INJECT_HELP " <name-prefix> [use-vars] [use-headers]" +# define FLT_OT_PARSE_SCOPE_EXTRACT_HELP " <name-prefix> [use-vars | use-headers]" +#else +# define FLT_OT_PARSE_SCOPE_INJECT_HELP " <name-prefix> [use-headers]" +# define FLT_OT_PARSE_SCOPE_EXTRACT_HELP " <name-prefix> [use-headers]" +#endif + +/* + * In case the possibility of working with OpenTracing context via HAProxyu + * variables is not used, args_max member of the structure flt_ot_parse_data + * should be reduced for 'inject' keyword. However, this is not critical + * because in this case the 'use-vars' argument cannot be entered anyway, + * so I will not complicate it here with additional definitions. + */ +#define FLT_OT_PARSE_SCOPE_DEFINES \ + FLT_OT_PARSE_SCOPE_DEF( ID, 0, CHAR, 2, 2, "ot-scope", " <name>") \ + FLT_OT_PARSE_SCOPE_DEF( SPAN, 0, NONE, 2, 5, "span", " <name> [<reference>] [root]") \ + FLT_OT_PARSE_SCOPE_DEF( TAG, 1, NONE, 3, 0, "tag", " <name> <sample> ...") \ + FLT_OT_PARSE_SCOPE_DEF( LOG, 1, NONE, 3, 0, "log", " <name> <sample> ...") \ + FLT_OT_PARSE_SCOPE_DEF(BAGGAGE, 1, VAR, 3, 0, "baggage", " <name> <sample> ...") \ + FLT_OT_PARSE_SCOPE_DEF( INJECT, 1, CTX, 2, 4, "inject", FLT_OT_PARSE_SCOPE_INJECT_HELP) \ + FLT_OT_PARSE_SCOPE_DEF(EXTRACT, 0, CTX, 2, 3, "extract", FLT_OT_PARSE_SCOPE_EXTRACT_HELP) \ + FLT_OT_PARSE_SCOPE_DEF( FINISH, 0, NONE, 2, 0, "finish", " <name> ...") \ + FLT_OT_PARSE_SCOPE_DEF( ACL, 0, CHAR, 3, 0, "acl", " <name> <criterion> [flags] [operator] <value> ...") \ + FLT_OT_PARSE_SCOPE_DEF( EVENT, 0, NONE, 2, 0, "event", " <name> [{ if | unless } <condition>]") + +enum FLT_OT_PARSE_INVCHAR_enum { + FLT_OT_PARSE_INVALID_NONE, + FLT_OT_PARSE_INVALID_CHAR, + FLT_OT_PARSE_INVALID_DOM, + FLT_OT_PARSE_INVALID_CTX, + FLT_OT_PARSE_INVALID_VAR, +}; + +enum FLT_OT_PARSE_TRACER_enum { +#define FLT_OT_PARSE_TRACER_DEF(a,b,c,d,e,f,g) FLT_OT_PARSE_TRACER_##a, + FLT_OT_PARSE_TRACER_DEFINES +#undef FLT_OT_PARSE_TRACER_DEF +}; + +enum FLT_OT_PARSE_GROUP_enum { +#define FLT_OT_PARSE_GROUP_DEF(a,b,c,d,e,f,g) FLT_OT_PARSE_GROUP_##a, + FLT_OT_PARSE_GROUP_DEFINES +#undef FLT_OT_PARSE_GROUP_DEF +}; + +enum FLT_OT_PARSE_SCOPE_enum { +#define FLT_OT_PARSE_SCOPE_DEF(a,b,c,d,e,f,g) FLT_OT_PARSE_SCOPE_##a, + FLT_OT_PARSE_SCOPE_DEFINES +#undef FLT_OT_PARSE_SCOPE_DEF +}; + +enum FLT_OT_CTX_USE_enum { + FLT_OT_CTX_USE_VARS = 1 << 0, + FLT_OT_CTX_USE_HEADERS = 1 << 1, +}; + +struct flt_ot_parse_data { + int keyword; /* Keyword index. */ + bool flag_check_id; /* Whether the group ID must be defined for the keyword. */ + int check_name; /* Checking allowed characters in the name. */ + int args_min; /* The minimum number of arguments required. */ + int args_max; /* The maximum number of arguments allowed. */ + const char *name; /* Keyword name. */ + const char *usage; /* Usage text to be printed in case of an error. */ +}; + +#define FLT_OT_PARSE_WARNING(f, ...) \ + ha_warning("parsing [%s:%d] : " FLT_OT_FMT_TYPE FLT_OT_FMT_NAME "'" f "'\n", ##__VA_ARGS__); +#define FLT_OT_PARSE_ALERT(f, ...) \ + do { \ + ha_alert("parsing [%s:%d] : " FLT_OT_FMT_TYPE FLT_OT_FMT_NAME "'" f "'\n", ##__VA_ARGS__); \ + \ + retval |= ERR_ABORT | ERR_ALERT; \ + } while (0) +#define FLT_OT_POST_PARSE_ALERT(f, ...) \ + FLT_OT_PARSE_ALERT(f, flt_ot_current_config->cfg_file, ##__VA_ARGS__) + +#define FLT_OT_PARSE_ERR(e,f, ...) \ + do { \ + if (*(e) == NULL) \ + (void)memprintf((e), f, ##__VA_ARGS__); \ + \ + retval |= ERR_ABORT | ERR_ALERT; \ + } while (0) +#define FLT_OT_PARSE_IFERR_ALERT() \ + do { \ + if (err == NULL) \ + break; \ + \ + FLT_OT_PARSE_ALERT("%s", file, linenum, err); \ + FLT_OT_ERR_FREE(err); \ + } while (0) + +#endif /* _OPENTRACING_PARSER_H_ */ + +/* + * Local variables: + * c-indent-level: 8 + * c-basic-offset: 8 + * End: + * + * vi: noexpandtab shiftwidth=8 tabstop=8 + */ |