diff options
Diffstat (limited to 'lib/isccfg/parser.c')
| -rw-r--r-- | lib/isccfg/parser.c | 3282 |
1 files changed, 3282 insertions, 0 deletions
diff --git a/lib/isccfg/parser.c b/lib/isccfg/parser.c new file mode 100644 index 0000000..e08e257 --- /dev/null +++ b/lib/isccfg/parser.c @@ -0,0 +1,3282 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +/*! \file */ + +#include <config.h> + +#include <inttypes.h> +#include <stdbool.h> +#include <stdlib.h> + +#include <isc/buffer.h> +#include <isc/dir.h> +#include <isc/formatcheck.h> +#include <isc/lex.h> +#include <isc/log.h> +#include <isc/mem.h> +#include <isc/net.h> +#include <isc/netaddr.h> +#include <isc/netscope.h> +#include <isc/print.h> +#include <isc/refcount.h> +#include <isc/string.h> +#include <isc/sockaddr.h> +#include <isc/symtab.h> +#include <isc/util.h> + +#include <isccfg/cfg.h> +#include <isccfg/grammar.h> +#include <isccfg/log.h> + +/* Shorthand */ +#define CAT CFG_LOGCATEGORY_CONFIG +#define MOD CFG_LOGMODULE_PARSER + +#define MAP_SYM 1 /* Unique type for isc_symtab */ + +#define TOKEN_STRING(pctx) (pctx->token.value.as_textregion.base) + +/* Check a return value. */ +#define CHECK(op) \ + do { result = (op); \ + if (result != ISC_R_SUCCESS) goto cleanup; \ + } while (0) + +/* Clean up a configuration object if non-NULL. */ +#define CLEANUP_OBJ(obj) \ + do { if ((obj) != NULL) cfg_obj_destroy(pctx, &(obj)); } while (0) + + +/* + * Forward declarations of static functions. + */ + +static void +free_tuple(cfg_parser_t *pctx, cfg_obj_t *obj); + +static isc_result_t +parse_list(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret); + +static void +print_list(cfg_printer_t *pctx, const cfg_obj_t *obj); + +static void +free_list(cfg_parser_t *pctx, cfg_obj_t *obj); + +static isc_result_t +create_listelt(cfg_parser_t *pctx, cfg_listelt_t **eltp); + +static isc_result_t +create_string(cfg_parser_t *pctx, const char *contents, const cfg_type_t *type, + cfg_obj_t **ret); + +static void +free_string(cfg_parser_t *pctx, cfg_obj_t *obj); + +static isc_result_t +create_map(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **objp); + +static void +free_map(cfg_parser_t *pctx, cfg_obj_t *obj); + +static isc_result_t +parse_symtab_elt(cfg_parser_t *pctx, const char *name, + cfg_type_t *elttype, isc_symtab_t *symtab, + bool callback); + +static void +free_noop(cfg_parser_t *pctx, cfg_obj_t *obj); + +static isc_result_t +cfg_getstringtoken(cfg_parser_t *pctx); + +static void +parser_complain(cfg_parser_t *pctx, bool is_warning, + unsigned int flags, const char *format, va_list args); + +/* + * Data representations. These correspond to members of the + * "value" union in struct cfg_obj (except "void", which does + * not need a union member). + */ + +LIBISCCFG_EXTERNAL_DATA cfg_rep_t cfg_rep_uint32 = { "uint32", free_noop }; +LIBISCCFG_EXTERNAL_DATA cfg_rep_t cfg_rep_uint64 = { "uint64", free_noop }; +LIBISCCFG_EXTERNAL_DATA cfg_rep_t cfg_rep_string = { "string", free_string }; +LIBISCCFG_EXTERNAL_DATA cfg_rep_t cfg_rep_boolean = { "boolean", free_noop }; +LIBISCCFG_EXTERNAL_DATA cfg_rep_t cfg_rep_map = { "map", free_map }; +LIBISCCFG_EXTERNAL_DATA cfg_rep_t cfg_rep_list = { "list", free_list }; +LIBISCCFG_EXTERNAL_DATA cfg_rep_t cfg_rep_tuple = { "tuple", free_tuple }; +LIBISCCFG_EXTERNAL_DATA cfg_rep_t cfg_rep_sockaddr = { "sockaddr", free_noop }; +LIBISCCFG_EXTERNAL_DATA cfg_rep_t cfg_rep_netprefix = + { "netprefix", free_noop }; +LIBISCCFG_EXTERNAL_DATA cfg_rep_t cfg_rep_void = { "void", free_noop }; +LIBISCCFG_EXTERNAL_DATA cfg_rep_t cfg_rep_fixedpoint = + { "fixedpoint", free_noop }; +LIBISCCFG_EXTERNAL_DATA cfg_rep_t cfg_rep_percentage = + { "percentage", free_noop }; + +/* + * Configuration type definitions. + */ + +/*% + * An implicit list. These are formed by clauses that occur multiple times. + */ +static cfg_type_t cfg_type_implicitlist = { + "implicitlist", NULL, print_list, NULL, &cfg_rep_list, NULL }; + +/* Functions. */ + +void +cfg_print_obj(cfg_printer_t *pctx, const cfg_obj_t *obj) { + REQUIRE(pctx != NULL); + REQUIRE(obj != NULL); + + obj->type->print(pctx, obj); +} + +void +cfg_print_chars(cfg_printer_t *pctx, const char *text, int len) { + REQUIRE(pctx != NULL); + REQUIRE(text != NULL); + + pctx->f(pctx->closure, text, len); +} + +static void +print_open(cfg_printer_t *pctx) { + if ((pctx->flags & CFG_PRINTER_ONELINE) != 0) + cfg_print_cstr(pctx, "{ "); + else { + cfg_print_cstr(pctx, "{\n"); + pctx->indent++; + } +} + +void +cfg_print_indent(cfg_printer_t *pctx) { + int indent = pctx->indent; + if ((pctx->flags & CFG_PRINTER_ONELINE) != 0) { + cfg_print_cstr(pctx, " "); + return; + } + while (indent > 0) { + cfg_print_cstr(pctx, "\t"); + indent--; + } +} + +static void +print_close(cfg_printer_t *pctx) { + if ((pctx->flags & CFG_PRINTER_ONELINE) == 0) { + pctx->indent--; + cfg_print_indent(pctx); + } + cfg_print_cstr(pctx, "}"); +} + +isc_result_t +cfg_parse_obj(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) { + isc_result_t result; + + REQUIRE(pctx != NULL); + REQUIRE(type != NULL); + REQUIRE(ret != NULL && *ret == NULL); + + result = type->parse(pctx, type, ret); + if (result != ISC_R_SUCCESS) + return (result); + ENSURE(*ret != NULL); + return (ISC_R_SUCCESS); +} + +void +cfg_print(const cfg_obj_t *obj, + void (*f)(void *closure, const char *text, int textlen), + void *closure) +{ + REQUIRE(obj != NULL); + REQUIRE(f != NULL); + + cfg_printx(obj, 0, f, closure); +} + +void +cfg_printx(const cfg_obj_t *obj, unsigned int flags, + void (*f)(void *closure, const char *text, int textlen), + void *closure) +{ + cfg_printer_t pctx; + + REQUIRE(obj != NULL); + REQUIRE(f != NULL); + + pctx.f = f; + pctx.closure = closure; + pctx.indent = 0; + pctx.flags = flags; + obj->type->print(&pctx, obj); +} + +/* Tuples. */ + +isc_result_t +cfg_create_tuple(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) { + isc_result_t result; + const cfg_tuplefielddef_t *fields = type->of; + const cfg_tuplefielddef_t *f; + cfg_obj_t *obj = NULL; + unsigned int nfields = 0; + int i; + + REQUIRE(pctx != NULL); + REQUIRE(type != NULL); + REQUIRE(ret != NULL && *ret == NULL); + + for (f = fields; f->name != NULL; f++) + nfields++; + + CHECK(cfg_create_obj(pctx, type, &obj)); + obj->value.tuple = isc_mem_get(pctx->mctx, + nfields * sizeof(cfg_obj_t *)); + if (obj->value.tuple == NULL) { + result = ISC_R_NOMEMORY; + goto cleanup; + } + for (f = fields, i = 0; f->name != NULL; f++, i++) + obj->value.tuple[i] = NULL; + *ret = obj; + return (ISC_R_SUCCESS); + + cleanup: + if (obj != NULL) + isc_mem_put(pctx->mctx, obj, sizeof(*obj)); + return (result); +} + +isc_result_t +cfg_parse_tuple(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) +{ + isc_result_t result; + const cfg_tuplefielddef_t *fields = type->of; + const cfg_tuplefielddef_t *f; + cfg_obj_t *obj = NULL; + unsigned int i; + + REQUIRE(pctx != NULL); + REQUIRE(type != NULL); + REQUIRE(ret != NULL && *ret == NULL); + + CHECK(cfg_create_tuple(pctx, type, &obj)); + for (f = fields, i = 0; f->name != NULL; f++, i++) + CHECK(cfg_parse_obj(pctx, f->type, &obj->value.tuple[i])); + + *ret = obj; + return (ISC_R_SUCCESS); + + cleanup: + CLEANUP_OBJ(obj); + return (result); +} + +void +cfg_print_tuple(cfg_printer_t *pctx, const cfg_obj_t *obj) { + unsigned int i; + const cfg_tuplefielddef_t *fields; + const cfg_tuplefielddef_t *f; + bool need_space = false; + + REQUIRE(pctx != NULL); + REQUIRE(obj != NULL); + + fields = obj->type->of; + + for (f = fields, i = 0; f->name != NULL; f++, i++) { + const cfg_obj_t *fieldobj = obj->value.tuple[i]; + if (need_space && fieldobj->type->rep != &cfg_rep_void) + cfg_print_cstr(pctx, " "); + cfg_print_obj(pctx, fieldobj); + need_space = (need_space || + fieldobj->type->print != cfg_print_void); + } +} + +void +cfg_doc_tuple(cfg_printer_t *pctx, const cfg_type_t *type) { + const cfg_tuplefielddef_t *fields; + const cfg_tuplefielddef_t *f; + bool need_space = false; + + REQUIRE(pctx != NULL); + REQUIRE(type != NULL); + + fields = type->of; + + for (f = fields; f->name != NULL; f++) { + if (need_space) + cfg_print_cstr(pctx, " "); + cfg_doc_obj(pctx, f->type); + need_space = (f->type->print != cfg_print_void); + } +} + +static void +free_tuple(cfg_parser_t *pctx, cfg_obj_t *obj) { + unsigned int i; + const cfg_tuplefielddef_t *fields = obj->type->of; + const cfg_tuplefielddef_t *f; + unsigned int nfields = 0; + + if (obj->value.tuple == NULL) + return; + + for (f = fields, i = 0; f->name != NULL; f++, i++) { + CLEANUP_OBJ(obj->value.tuple[i]); + nfields++; + } + isc_mem_put(pctx->mctx, obj->value.tuple, + nfields * sizeof(cfg_obj_t *)); +} + +bool +cfg_obj_istuple(const cfg_obj_t *obj) { + REQUIRE(obj != NULL); + return (obj->type->rep == &cfg_rep_tuple); +} + +const cfg_obj_t * +cfg_tuple_get(const cfg_obj_t *tupleobj, const char* name) { + unsigned int i; + const cfg_tuplefielddef_t *fields; + const cfg_tuplefielddef_t *f; + + REQUIRE(tupleobj != NULL && tupleobj->type->rep == &cfg_rep_tuple); + REQUIRE(name != NULL); + + fields = tupleobj->type->of; + for (f = fields, i = 0; f->name != NULL; f++, i++) { + if (strcmp(f->name, name) == 0) + return (tupleobj->value.tuple[i]); + } + INSIST(0); + return (NULL); +} + +isc_result_t +cfg_parse_special(cfg_parser_t *pctx, int special) { + isc_result_t result; + + REQUIRE(pctx != NULL); + + CHECK(cfg_gettoken(pctx, 0)); + if (pctx->token.type == isc_tokentype_special && + pctx->token.value.as_char == special) + return (ISC_R_SUCCESS); + + cfg_parser_error(pctx, CFG_LOG_NEAR, "'%c' expected", special); + return (ISC_R_UNEXPECTEDTOKEN); + cleanup: + return (result); +} + +/* + * Parse a required semicolon. If it is not there, log + * an error and increment the error count but continue + * parsing. Since the next token is pushed back, + * care must be taken to make sure it is eventually + * consumed or an infinite loop may result. + */ +static isc_result_t +parse_semicolon(cfg_parser_t *pctx) { + isc_result_t result; + + CHECK(cfg_gettoken(pctx, 0)); + if (pctx->token.type == isc_tokentype_special && + pctx->token.value.as_char == ';') + return (ISC_R_SUCCESS); + + cfg_parser_error(pctx, CFG_LOG_BEFORE, "missing ';'"); + cfg_ungettoken(pctx); + cleanup: + return (result); +} + +/* + * Parse EOF, logging and returning an error if not there. + */ +static isc_result_t +parse_eof(cfg_parser_t *pctx) { + isc_result_t result; + + CHECK(cfg_gettoken(pctx, 0)); + + if (pctx->token.type == isc_tokentype_eof) + return (ISC_R_SUCCESS); + + cfg_parser_error(pctx, CFG_LOG_NEAR, "syntax error"); + return (ISC_R_UNEXPECTEDTOKEN); + cleanup: + return (result); +} + +/* A list of files, used internally for pctx->files. */ + +static cfg_type_t cfg_type_filelist = { + "filelist", NULL, print_list, NULL, &cfg_rep_list, + &cfg_type_qstring +}; + +isc_result_t +cfg_parser_create(isc_mem_t *mctx, isc_log_t *lctx, cfg_parser_t **ret) { + isc_result_t result; + cfg_parser_t *pctx; + isc_lexspecials_t specials; + + REQUIRE(mctx != NULL); + REQUIRE(ret != NULL && *ret == NULL); + + pctx = isc_mem_get(mctx, sizeof(*pctx)); + if (pctx == NULL) + return (ISC_R_NOMEMORY); + + pctx->mctx = NULL; + isc_mem_attach(mctx, &pctx->mctx); + + result = isc_refcount_init(&pctx->references, 1); + if (result != ISC_R_SUCCESS) { + isc_mem_putanddetach(&pctx->mctx, pctx, sizeof(*pctx)); + return (result); + } + + pctx->lctx = lctx; + pctx->lexer = NULL; + pctx->seen_eof = false; + pctx->ungotten = false; + pctx->errors = 0; + pctx->warnings = 0; + pctx->open_files = NULL; + pctx->closed_files = NULL; + pctx->line = 0; + pctx->callback = NULL; + pctx->callbackarg = NULL; + pctx->token.type = isc_tokentype_unknown; + pctx->flags = 0; + pctx->buf_name = NULL; + + memset(specials, 0, sizeof(specials)); + specials['{'] = 1; + specials['}'] = 1; + specials[';'] = 1; + specials['/'] = 1; + specials['"'] = 1; + specials['!'] = 1; + + CHECK(isc_lex_create(pctx->mctx, 1024, &pctx->lexer)); + + isc_lex_setspecials(pctx->lexer, specials); + isc_lex_setcomments(pctx->lexer, (ISC_LEXCOMMENT_C | + ISC_LEXCOMMENT_CPLUSPLUS | + ISC_LEXCOMMENT_SHELL)); + + CHECK(cfg_create_list(pctx, &cfg_type_filelist, &pctx->open_files)); + CHECK(cfg_create_list(pctx, &cfg_type_filelist, &pctx->closed_files)); + + *ret = pctx; + return (ISC_R_SUCCESS); + + cleanup: + if (pctx->lexer != NULL) + isc_lex_destroy(&pctx->lexer); + CLEANUP_OBJ(pctx->open_files); + CLEANUP_OBJ(pctx->closed_files); + isc_mem_putanddetach(&pctx->mctx, pctx, sizeof(*pctx)); + return (result); +} + +static isc_result_t +parser_openfile(cfg_parser_t *pctx, const char *filename) { + isc_result_t result; + cfg_listelt_t *elt = NULL; + cfg_obj_t *stringobj = NULL; + + result = isc_lex_openfile(pctx->lexer, filename); + if (result != ISC_R_SUCCESS) { + cfg_parser_error(pctx, 0, "open: %s: %s", + filename, isc_result_totext(result)); + goto cleanup; + } + + CHECK(create_string(pctx, filename, &cfg_type_qstring, &stringobj)); + CHECK(create_listelt(pctx, &elt)); + elt->obj = stringobj; + ISC_LIST_APPEND(pctx->open_files->value.list, elt, link); + + return (ISC_R_SUCCESS); + cleanup: + CLEANUP_OBJ(stringobj); + return (result); +} + +void +cfg_parser_setcallback(cfg_parser_t *pctx, + cfg_parsecallback_t callback, + void *arg) +{ + REQUIRE(pctx != NULL); + + pctx->callback = callback; + pctx->callbackarg = arg; +} + +void +cfg_parser_reset(cfg_parser_t *pctx) { + REQUIRE(pctx != NULL); + + if (pctx->lexer != NULL) + isc_lex_close(pctx->lexer); + + pctx->seen_eof = false; + pctx->ungotten = false; + pctx->errors = 0; + pctx->warnings = 0; + pctx->line = 0; +} + +/* + * Parse a configuration using a pctx where a lexer has already + * been set up with a source. + */ +static isc_result_t +parse2(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) { + isc_result_t result; + cfg_obj_t *obj = NULL; + + result = cfg_parse_obj(pctx, type, &obj); + + if (pctx->errors != 0) { + /* Errors have been logged. */ + if (result == ISC_R_SUCCESS) + result = ISC_R_FAILURE; + goto cleanup; + } + + if (result != ISC_R_SUCCESS) { + /* Parsing failed but no errors have been logged. */ + cfg_parser_error(pctx, 0, "parsing failed: %s", + isc_result_totext(result)); + goto cleanup; + } + + CHECK(parse_eof(pctx)); + + *ret = obj; + return (ISC_R_SUCCESS); + + cleanup: + CLEANUP_OBJ(obj); + return (result); +} + +isc_result_t +cfg_parse_file(cfg_parser_t *pctx, const char *filename, + const cfg_type_t *type, cfg_obj_t **ret) +{ + isc_result_t result; + cfg_listelt_t *elt; + + REQUIRE(pctx != NULL); + REQUIRE(filename != NULL); + REQUIRE(type != NULL); + REQUIRE(ret != NULL && *ret == NULL); + + CHECK(parser_openfile(pctx, filename)); + + result = parse2(pctx, type, ret); + + /* Clean up the opened file */ + elt = ISC_LIST_TAIL(pctx->open_files->value.list); + INSIST(elt != NULL); + ISC_LIST_UNLINK(pctx->open_files->value.list, elt, link); + ISC_LIST_APPEND(pctx->closed_files->value.list, elt, link); + + cleanup: + return (result); +} + + +isc_result_t +cfg_parse_buffer(cfg_parser_t *pctx, isc_buffer_t *buffer, + const cfg_type_t *type, cfg_obj_t **ret) +{ + return (cfg_parse_buffer4(pctx, buffer, NULL, 0, type, 0, ret)); +} + +isc_result_t +cfg_parse_buffer2(cfg_parser_t *pctx, isc_buffer_t *buffer, + const char *file, const cfg_type_t *type, + cfg_obj_t **ret) +{ + return (cfg_parse_buffer4(pctx, buffer, file, 0, type, 0, ret)); +} + +isc_result_t +cfg_parse_buffer3(cfg_parser_t *pctx, isc_buffer_t *buffer, + const char *file, unsigned int line, + const cfg_type_t *type, cfg_obj_t **ret) +{ + return (cfg_parse_buffer4(pctx, buffer, file, line, type, 0, ret)); +} + +isc_result_t +cfg_parse_buffer4(cfg_parser_t *pctx, isc_buffer_t *buffer, + const char *file, unsigned int line, + const cfg_type_t *type, unsigned int flags, + cfg_obj_t **ret) +{ + isc_result_t result; + + REQUIRE(pctx != NULL); + REQUIRE(type != NULL); + REQUIRE(buffer != NULL); + REQUIRE(ret != NULL && *ret == NULL); + REQUIRE((flags & ~(CFG_PCTX_NODEPRECATED)) == 0); + + CHECK(isc_lex_openbuffer(pctx->lexer, buffer)); + + pctx->buf_name = file; + pctx->flags = flags; + + if (line != 0U) + CHECK(isc_lex_setsourceline(pctx->lexer, line)); + + CHECK(parse2(pctx, type, ret)); + pctx->buf_name = NULL; + + cleanup: + return (result); +} + +void +cfg_parser_attach(cfg_parser_t *src, cfg_parser_t **dest) { + REQUIRE(src != NULL); + REQUIRE(dest != NULL && *dest == NULL); + + isc_refcount_increment(&src->references, NULL); + *dest = src; +} + +void +cfg_parser_destroy(cfg_parser_t **pctxp) { + cfg_parser_t *pctx; + unsigned int refs; + + REQUIRE(pctxp != NULL && *pctxp != NULL); + + pctx = *pctxp; + *pctxp = NULL; + + isc_refcount_decrement(&pctx->references, &refs); + if (refs == 0) { + isc_lex_destroy(&pctx->lexer); + /* + * Cleaning up open_files does not + * close the files; that was already done + * by closing the lexer. + */ + CLEANUP_OBJ(pctx->open_files); + CLEANUP_OBJ(pctx->closed_files); + isc_mem_putanddetach(&pctx->mctx, pctx, sizeof(*pctx)); + } +} + +/* + * void + */ +isc_result_t +cfg_parse_void(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) { + REQUIRE(pctx != NULL); + REQUIRE(ret != NULL && *ret == NULL); + + UNUSED(type); + + return (cfg_create_obj(pctx, &cfg_type_void, ret)); +} + +void +cfg_print_void(cfg_printer_t *pctx, const cfg_obj_t *obj) { + + REQUIRE(pctx != NULL); + REQUIRE(obj != NULL); + + UNUSED(pctx); + UNUSED(obj); +} + +void +cfg_doc_void(cfg_printer_t *pctx, const cfg_type_t *type) { + + REQUIRE(pctx != NULL); + REQUIRE(type != NULL); + + UNUSED(pctx); + UNUSED(type); +} + +bool +cfg_obj_isvoid(const cfg_obj_t *obj) { + REQUIRE(obj != NULL); + return (obj->type->rep == &cfg_rep_void); +} + +LIBISCCFG_EXTERNAL_DATA cfg_type_t cfg_type_void = { + "void", cfg_parse_void, cfg_print_void, cfg_doc_void, &cfg_rep_void, + NULL }; + +/* + * percentage + */ +isc_result_t +cfg_parse_percentage(cfg_parser_t *pctx, const cfg_type_t *type, + cfg_obj_t **ret) +{ + char *endp; + isc_result_t result; + cfg_obj_t *obj = NULL; + uint64_t percent; + + REQUIRE(pctx != NULL); + REQUIRE(ret != NULL && *ret == NULL); + + UNUSED(type); + + CHECK(cfg_gettoken(pctx, 0)); + if (pctx->token.type != isc_tokentype_string) { + cfg_parser_error(pctx, CFG_LOG_NEAR, + "expected percentage"); + return (ISC_R_UNEXPECTEDTOKEN); + } + + percent = isc_string_touint64(TOKEN_STRING(pctx), &endp, 10); + if (*endp != '%' || *(endp+1) != 0) { + cfg_parser_error(pctx, CFG_LOG_NEAR, + "expected percentage"); + return (ISC_R_UNEXPECTEDTOKEN); + } + + CHECK(cfg_create_obj(pctx, &cfg_type_percentage, &obj)); + obj->value.uint32 = (uint32_t)percent; + *ret = obj; + + cleanup: + return (result); +} + +void +cfg_print_percentage(cfg_printer_t *pctx, const cfg_obj_t *obj) { + char buf[64]; + int n; + + REQUIRE(pctx != NULL); + REQUIRE(obj != NULL); + + n = snprintf(buf, sizeof(buf), "%u%%", obj->value.uint32); + INSIST(n > 0 && (size_t)n < sizeof(buf)); + cfg_print_chars(pctx, buf, strlen(buf)); +} + +uint32_t +cfg_obj_aspercentage(const cfg_obj_t *obj) { + REQUIRE(obj != NULL && obj->type->rep == &cfg_rep_percentage); + return (obj->value.uint32); +} + +LIBISCCFG_EXTERNAL_DATA cfg_type_t cfg_type_percentage = { + "percentage", cfg_parse_percentage, cfg_print_percentage, + cfg_doc_terminal, &cfg_rep_percentage, NULL +}; + +bool +cfg_obj_ispercentage(const cfg_obj_t *obj) { + REQUIRE(obj != NULL); + return (obj->type->rep == &cfg_rep_percentage); +} + +/* + * Fixed point + */ +isc_result_t +cfg_parse_fixedpoint(cfg_parser_t *pctx, const cfg_type_t *type, + cfg_obj_t **ret) +{ + isc_result_t result; + cfg_obj_t *obj = NULL; + size_t n1, n2, n3, l; + const char *p; + + REQUIRE(pctx != NULL); + REQUIRE(ret != NULL && *ret == NULL); + + UNUSED(type); + + CHECK(cfg_gettoken(pctx, 0)); + if (pctx->token.type != isc_tokentype_string) { + cfg_parser_error(pctx, CFG_LOG_NEAR, + "expected fixed point number"); + return (ISC_R_UNEXPECTEDTOKEN); + } + + + p = TOKEN_STRING(pctx); + l = strlen(p); + n1 = strspn(p, "0123456789"); + n2 = strspn(p + n1, "."); + n3 = strspn(p + n1 + n2, "0123456789"); + + if ((n1 + n2 + n3 != l) || (n1 + n3 == 0) || + n1 > 5 || n2 > 1 || n3 > 2) { + cfg_parser_error(pctx, CFG_LOG_NEAR, + "expected fixed point number"); + return (ISC_R_UNEXPECTEDTOKEN); + } + + CHECK(cfg_create_obj(pctx, &cfg_type_fixedpoint, &obj)); + + obj->value.uint32 = strtoul(p, NULL, 10) * 100; + switch (n3) { + case 2: + obj->value.uint32 += strtoul(p + n1 + n2, NULL, 10); + break; + case 1: + obj->value.uint32 += strtoul(p + n1 + n2, NULL, 10) * 10; + break; + } + *ret = obj; + + cleanup: + return (result); +} + +void +cfg_print_fixedpoint(cfg_printer_t *pctx, const cfg_obj_t *obj) { + char buf[64]; + int n; + + REQUIRE(pctx != NULL); + REQUIRE(obj != NULL); + + n = snprintf(buf, sizeof(buf), "%u.%02u", + obj->value.uint32/100, obj->value.uint32%100); + INSIST(n > 0 && (size_t)n < sizeof(buf)); + cfg_print_chars(pctx, buf, strlen(buf)); +} + +uint32_t +cfg_obj_asfixedpoint(const cfg_obj_t *obj) { + REQUIRE(obj != NULL && obj->type->rep == &cfg_rep_fixedpoint); + return (obj->value.uint32); +} + +LIBISCCFG_EXTERNAL_DATA cfg_type_t cfg_type_fixedpoint = { + "fixedpoint", cfg_parse_fixedpoint, cfg_print_fixedpoint, + cfg_doc_terminal, &cfg_rep_fixedpoint, NULL +}; + +bool +cfg_obj_isfixedpoint(const cfg_obj_t *obj) { + REQUIRE(obj != NULL); + return (obj->type->rep == &cfg_rep_fixedpoint); +} + +/* + * uint32 + */ +isc_result_t +cfg_parse_uint32(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) { + isc_result_t result; + cfg_obj_t *obj = NULL; + + REQUIRE(pctx != NULL); + REQUIRE(ret != NULL && *ret == NULL); + + UNUSED(type); + + CHECK(cfg_gettoken(pctx, ISC_LEXOPT_NUMBER | ISC_LEXOPT_CNUMBER)); + if (pctx->token.type != isc_tokentype_number) { + cfg_parser_error(pctx, CFG_LOG_NEAR, "expected number"); + return (ISC_R_UNEXPECTEDTOKEN); + } + + CHECK(cfg_create_obj(pctx, &cfg_type_uint32, &obj)); + + obj->value.uint32 = pctx->token.value.as_ulong; + *ret = obj; + cleanup: + return (result); +} + +void +cfg_print_cstr(cfg_printer_t *pctx, const char *s) { + cfg_print_chars(pctx, s, strlen(s)); +} + +void +cfg_print_rawuint(cfg_printer_t *pctx, unsigned int u) { + char buf[32]; + + snprintf(buf, sizeof(buf), "%u", u); + cfg_print_cstr(pctx, buf); +} + +void +cfg_print_uint32(cfg_printer_t *pctx, const cfg_obj_t *obj) { + cfg_print_rawuint(pctx, obj->value.uint32); +} + +bool +cfg_obj_isuint32(const cfg_obj_t *obj) { + REQUIRE(obj != NULL); + return (obj->type->rep == &cfg_rep_uint32); +} + +uint32_t +cfg_obj_asuint32(const cfg_obj_t *obj) { + REQUIRE(obj != NULL && obj->type->rep == &cfg_rep_uint32); + return (obj->value.uint32); +} + +LIBISCCFG_EXTERNAL_DATA cfg_type_t cfg_type_uint32 = { + "integer", cfg_parse_uint32, cfg_print_uint32, cfg_doc_terminal, + &cfg_rep_uint32, NULL +}; + + +/* + * uint64 + */ +bool +cfg_obj_isuint64(const cfg_obj_t *obj) { + REQUIRE(obj != NULL); + return (obj->type->rep == &cfg_rep_uint64); +} + +uint64_t +cfg_obj_asuint64(const cfg_obj_t *obj) { + REQUIRE(obj != NULL && obj->type->rep == &cfg_rep_uint64); + return (obj->value.uint64); +} + +void +cfg_print_uint64(cfg_printer_t *pctx, const cfg_obj_t *obj) { + char buf[32]; + + snprintf(buf, sizeof(buf), "%" PRIu64, + obj->value.uint64); + cfg_print_cstr(pctx, buf); +} + +LIBISCCFG_EXTERNAL_DATA cfg_type_t cfg_type_uint64 = { + "64_bit_integer", NULL, cfg_print_uint64, cfg_doc_terminal, + &cfg_rep_uint64, NULL +}; + +/* + * qstring (quoted string), ustring (unquoted string), astring + * (any string) + */ + +/* Create a string object from a null-terminated C string. */ +static isc_result_t +create_string(cfg_parser_t *pctx, const char *contents, const cfg_type_t *type, + cfg_obj_t **ret) +{ + isc_result_t result; + cfg_obj_t *obj = NULL; + int len; + + CHECK(cfg_create_obj(pctx, type, &obj)); + len = strlen(contents); + obj->value.string.length = len; + obj->value.string.base = isc_mem_get(pctx->mctx, len + 1); + if (obj->value.string.base == 0) { + isc_mem_put(pctx->mctx, obj, sizeof(*obj)); + return (ISC_R_NOMEMORY); + } + memmove(obj->value.string.base, contents, len); + obj->value.string.base[len] = '\0'; + + *ret = obj; + cleanup: + return (result); +} + +isc_result_t +cfg_parse_qstring(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) { + isc_result_t result; + + REQUIRE(pctx != NULL); + REQUIRE(ret != NULL && *ret == NULL); + + UNUSED(type); + + CHECK(cfg_gettoken(pctx, CFG_LEXOPT_QSTRING)); + if (pctx->token.type != isc_tokentype_qstring) { + cfg_parser_error(pctx, CFG_LOG_NEAR, "expected quoted string"); + return (ISC_R_UNEXPECTEDTOKEN); + } + return (create_string(pctx, TOKEN_STRING(pctx), + &cfg_type_qstring, ret)); + cleanup: + return (result); +} + +static isc_result_t +parse_ustring(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) { + isc_result_t result; + + UNUSED(type); + + CHECK(cfg_gettoken(pctx, 0)); + if (pctx->token.type != isc_tokentype_string) { + cfg_parser_error(pctx, CFG_LOG_NEAR, "expected unquoted string"); + return (ISC_R_UNEXPECTEDTOKEN); + } + return (create_string(pctx, + TOKEN_STRING(pctx), + &cfg_type_ustring, + ret)); + cleanup: + return (result); +} + +isc_result_t +cfg_parse_astring(cfg_parser_t *pctx, const cfg_type_t *type, + cfg_obj_t **ret) +{ + isc_result_t result; + + REQUIRE(pctx != NULL); + REQUIRE(ret != NULL && *ret == NULL); + + UNUSED(type); + + CHECK(cfg_getstringtoken(pctx)); + return (create_string(pctx, + TOKEN_STRING(pctx), + &cfg_type_qstring, + ret)); + cleanup: + return (result); +} + +isc_result_t +cfg_parse_sstring(cfg_parser_t *pctx, const cfg_type_t *type, + cfg_obj_t **ret) +{ + isc_result_t result; + + REQUIRE(pctx != NULL); + REQUIRE(ret != NULL && *ret == NULL); + + UNUSED(type); + + CHECK(cfg_getstringtoken(pctx)); + return (create_string(pctx, + TOKEN_STRING(pctx), + &cfg_type_sstring, + ret)); + cleanup: + return (result); +} + +static isc_result_t +parse_btext(cfg_parser_t *pctx, const cfg_type_t *type, + cfg_obj_t **ret) +{ + isc_result_t result; + + UNUSED(type); + + CHECK(cfg_gettoken(pctx, ISC_LEXOPT_BTEXT)); + if (pctx->token.type != isc_tokentype_btext) { + cfg_parser_error(pctx, CFG_LOG_NEAR, + "expected bracketed text"); + return (ISC_R_UNEXPECTEDTOKEN); + } + return (create_string(pctx, + TOKEN_STRING(pctx), + &cfg_type_bracketed_text, + ret)); + cleanup: + return (result); +} + +static void +print_btext(cfg_printer_t *pctx, const cfg_obj_t *obj) { + /* + * We need to print "{" instead of running print_open() + * in order to preserve the exact original formatting + * of the bracketed text. But we increment the indent value + * so that print_close() will leave us back in our original + * state. + */ + pctx->indent++; + cfg_print_cstr(pctx, "{"); + cfg_print_chars(pctx, obj->value.string.base, obj->value.string.length); + print_close(pctx); +} + +static void +doc_btext(cfg_printer_t *pctx, const cfg_type_t *type) { + UNUSED(type); + + cfg_print_cstr(pctx, "{ <unspecified-text> }"); +} + + +bool +cfg_is_enum(const char *s, const char *const *enums) { + const char * const *p; + + REQUIRE(s != NULL); + REQUIRE(enums != NULL); + + for (p = enums; *p != NULL; p++) { + if (strcasecmp(*p, s) == 0) + return (true); + } + return (false); +} + +static isc_result_t +check_enum(cfg_parser_t *pctx, cfg_obj_t *obj, const char *const *enums) { + const char *s = obj->value.string.base; + + if (cfg_is_enum(s, enums)) + return (ISC_R_SUCCESS); + cfg_parser_error(pctx, 0, "'%s' unexpected", s); + return (ISC_R_UNEXPECTEDTOKEN); +} + +isc_result_t +cfg_parse_enum(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) { + isc_result_t result; + cfg_obj_t *obj = NULL; + + REQUIRE(pctx != NULL); + REQUIRE(type != NULL); + REQUIRE(ret != NULL && *ret == NULL); + + CHECK(parse_ustring(pctx, NULL, &obj)); + CHECK(check_enum(pctx, obj, type->of)); + *ret = obj; + return (ISC_R_SUCCESS); + cleanup: + CLEANUP_OBJ(obj); + return (result); +} + +void +cfg_doc_enum(cfg_printer_t *pctx, const cfg_type_t *type) { + const char * const *p; + + REQUIRE(pctx != NULL); + REQUIRE(type != NULL); + + cfg_print_cstr(pctx, "( "); + for (p = type->of; *p != NULL; p++) { + cfg_print_cstr(pctx, *p); + if (p[1] != NULL) + cfg_print_cstr(pctx, " | "); + } + cfg_print_cstr(pctx, " )"); +} + +void +cfg_print_ustring(cfg_printer_t *pctx, const cfg_obj_t *obj) { + REQUIRE(pctx != NULL); + REQUIRE(obj != NULL); + + cfg_print_chars(pctx, obj->value.string.base, obj->value.string.length); +} + +static void +print_qstring(cfg_printer_t *pctx, const cfg_obj_t *obj) { + cfg_print_cstr(pctx, "\""); + cfg_print_ustring(pctx, obj); + cfg_print_cstr(pctx, "\""); +} + +static void +print_sstring(cfg_printer_t *pctx, const cfg_obj_t *obj) { + cfg_print_cstr(pctx, "\""); + if ((pctx->flags & CFG_PRINTER_XKEY) != 0) { + unsigned int len = obj->value.string.length; + while (len-- > 0) + cfg_print_cstr(pctx, "?"); + } else + cfg_print_ustring(pctx, obj); + cfg_print_cstr(pctx, "\""); +} + +static void +free_string(cfg_parser_t *pctx, cfg_obj_t *obj) { + isc_mem_put(pctx->mctx, obj->value.string.base, + obj->value.string.length + 1); +} + +bool +cfg_obj_isstring(const cfg_obj_t *obj) { + REQUIRE(obj != NULL); + return (obj->type->rep == &cfg_rep_string); +} + +const char * +cfg_obj_asstring(const cfg_obj_t *obj) { + REQUIRE(obj != NULL && obj->type->rep == &cfg_rep_string); + return (obj->value.string.base); +} + +/* Quoted string only */ +LIBISCCFG_EXTERNAL_DATA cfg_type_t cfg_type_qstring = { + "quoted_string", cfg_parse_qstring, print_qstring, cfg_doc_terminal, + &cfg_rep_string, NULL +}; + +/* Unquoted string only */ +LIBISCCFG_EXTERNAL_DATA cfg_type_t cfg_type_ustring = { + "string", parse_ustring, cfg_print_ustring, cfg_doc_terminal, + &cfg_rep_string, NULL +}; + +/* Any string (quoted or unquoted); printed with quotes */ +LIBISCCFG_EXTERNAL_DATA cfg_type_t cfg_type_astring = { + "string", cfg_parse_astring, print_qstring, cfg_doc_terminal, + &cfg_rep_string, NULL +}; + +/* + * Any string (quoted or unquoted); printed with quotes. + * If CFG_PRINTER_XKEY is set when printing the string will be '?' out. + */ +LIBISCCFG_EXTERNAL_DATA cfg_type_t cfg_type_sstring = { + "string", cfg_parse_sstring, print_sstring, cfg_doc_terminal, + &cfg_rep_string, NULL +}; + +/* + * Text enclosed in brackets. Used to pass a block of configuration + * text to dynamic library or external application. Checked for + * bracket balance, but not otherwise parsed. + */ +LIBISCCFG_EXTERNAL_DATA cfg_type_t cfg_type_bracketed_text = { + "bracketed_text", parse_btext, print_btext, doc_btext, + &cfg_rep_string, NULL +}; + +/* + * Booleans + */ + +bool +cfg_obj_isboolean(const cfg_obj_t *obj) { + REQUIRE(obj != NULL); + return (obj->type->rep == &cfg_rep_boolean); +} + +bool +cfg_obj_asboolean(const cfg_obj_t *obj) { + REQUIRE(obj != NULL && obj->type->rep == &cfg_rep_boolean); + return (obj->value.boolean); +} + +isc_result_t +cfg_parse_boolean(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) +{ + isc_result_t result; + bool value; + cfg_obj_t *obj = NULL; + + REQUIRE(pctx != NULL); + REQUIRE(ret != NULL && *ret == NULL); + + UNUSED(type); + + result = cfg_gettoken(pctx, 0); + if (result != ISC_R_SUCCESS) + return (result); + + if (pctx->token.type != isc_tokentype_string) + goto bad_boolean; + + if ((strcasecmp(TOKEN_STRING(pctx), "true") == 0) || + (strcasecmp(TOKEN_STRING(pctx), "yes") == 0) || + (strcmp(TOKEN_STRING(pctx), "1") == 0)) { + value = true; + } else if ((strcasecmp(TOKEN_STRING(pctx), "false") == 0) || + (strcasecmp(TOKEN_STRING(pctx), "no") == 0) || + (strcmp(TOKEN_STRING(pctx), "0") == 0)) { + value = false; + } else { + goto bad_boolean; + } + + CHECK(cfg_create_obj(pctx, &cfg_type_boolean, &obj)); + obj->value.boolean = value; + *ret = obj; + return (result); + + bad_boolean: + cfg_parser_error(pctx, CFG_LOG_NEAR, "boolean expected"); + return (ISC_R_UNEXPECTEDTOKEN); + + cleanup: + return (result); +} + +void +cfg_print_boolean(cfg_printer_t *pctx, const cfg_obj_t *obj) { + REQUIRE(pctx != NULL); + REQUIRE(obj != NULL); + + if (obj->value.boolean) + cfg_print_cstr(pctx, "yes"); + else + cfg_print_cstr(pctx, "no"); +} + +LIBISCCFG_EXTERNAL_DATA cfg_type_t cfg_type_boolean = { + "boolean", cfg_parse_boolean, cfg_print_boolean, cfg_doc_terminal, + &cfg_rep_boolean, NULL +}; + +/* + * Lists. + */ + +isc_result_t +cfg_create_list(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **obj) { + isc_result_t result; + + REQUIRE(pctx != NULL); + REQUIRE(type != NULL); + REQUIRE(obj != NULL && *obj == NULL); + + CHECK(cfg_create_obj(pctx, type, obj)); + ISC_LIST_INIT((*obj)->value.list); + cleanup: + return (result); +} + +static isc_result_t +create_listelt(cfg_parser_t *pctx, cfg_listelt_t **eltp) { + cfg_listelt_t *elt; + + elt = isc_mem_get(pctx->mctx, sizeof(*elt)); + if (elt == NULL) + return (ISC_R_NOMEMORY); + elt->obj = NULL; + ISC_LINK_INIT(elt, link); + *eltp = elt; + return (ISC_R_SUCCESS); +} + +static void +free_listelt(cfg_parser_t *pctx, cfg_listelt_t *elt) { + if (elt->obj != NULL) + cfg_obj_destroy(pctx, &elt->obj); + isc_mem_put(pctx->mctx, elt, sizeof(*elt)); +} + +static void +free_list(cfg_parser_t *pctx, cfg_obj_t *obj) { + cfg_listelt_t *elt, *next; + for (elt = ISC_LIST_HEAD(obj->value.list); + elt != NULL; + elt = next) + { + next = ISC_LIST_NEXT(elt, link); + free_listelt(pctx, elt); + } +} + +isc_result_t +cfg_parse_listelt(cfg_parser_t *pctx, const cfg_type_t *elttype, + cfg_listelt_t **ret) +{ + isc_result_t result; + cfg_listelt_t *elt = NULL; + cfg_obj_t *value = NULL; + + REQUIRE(pctx != NULL); + REQUIRE(elttype != NULL); + REQUIRE(ret != NULL && *ret == NULL); + + CHECK(create_listelt(pctx, &elt)); + + result = cfg_parse_obj(pctx, elttype, &value); + if (result != ISC_R_SUCCESS) + goto cleanup; + + elt->obj = value; + + *ret = elt; + return (ISC_R_SUCCESS); + + cleanup: + isc_mem_put(pctx->mctx, elt, sizeof(*elt)); + return (result); +} + +/* + * Parse a homogeneous list whose elements are of type 'elttype' + * and where each element is terminated by a semicolon. + */ +static isc_result_t +parse_list(cfg_parser_t *pctx, const cfg_type_t *listtype, cfg_obj_t **ret) +{ + cfg_obj_t *listobj = NULL; + const cfg_type_t *listof = listtype->of; + isc_result_t result; + cfg_listelt_t *elt = NULL; + + CHECK(cfg_create_list(pctx, listtype, &listobj)); + + for (;;) { + CHECK(cfg_peektoken(pctx, 0)); + if (pctx->token.type == isc_tokentype_special && + pctx->token.value.as_char == /*{*/ '}') + break; + CHECK(cfg_parse_listelt(pctx, listof, &elt)); + CHECK(parse_semicolon(pctx)); + ISC_LIST_APPEND(listobj->value.list, elt, link); + elt = NULL; + } + *ret = listobj; + return (ISC_R_SUCCESS); + + cleanup: + if (elt != NULL) + free_listelt(pctx, elt); + CLEANUP_OBJ(listobj); + return (result); +} + +static void +print_list(cfg_printer_t *pctx, const cfg_obj_t *obj) { + const cfg_list_t *list = &obj->value.list; + const cfg_listelt_t *elt; + + for (elt = ISC_LIST_HEAD(*list); + elt != NULL; + elt = ISC_LIST_NEXT(elt, link)) + { + if ((pctx->flags & CFG_PRINTER_ONELINE) != 0) { + cfg_print_obj(pctx, elt->obj); + cfg_print_cstr(pctx, "; "); + } else { + cfg_print_indent(pctx); + cfg_print_obj(pctx, elt->obj); + cfg_print_cstr(pctx, ";\n"); + } + } +} + +isc_result_t +cfg_parse_bracketed_list(cfg_parser_t *pctx, const cfg_type_t *type, + cfg_obj_t **ret) +{ + isc_result_t result; + + REQUIRE(pctx != NULL); + REQUIRE(type != NULL); + REQUIRE(ret != NULL && *ret == NULL); + + CHECK(cfg_parse_special(pctx, '{')); + CHECK(parse_list(pctx, type, ret)); + CHECK(cfg_parse_special(pctx, '}')); + cleanup: + return (result); +} + +void +cfg_print_bracketed_list(cfg_printer_t *pctx, const cfg_obj_t *obj) { + REQUIRE(pctx != NULL); + REQUIRE(obj != NULL); + + print_open(pctx); + print_list(pctx, obj); + print_close(pctx); +} + +void +cfg_doc_bracketed_list(cfg_printer_t *pctx, const cfg_type_t *type) { + REQUIRE(pctx != NULL); + REQUIRE(type != NULL); + + cfg_print_cstr(pctx, "{ "); + cfg_doc_obj(pctx, type->of); + cfg_print_cstr(pctx, "; ... }"); +} + +/* + * Parse a homogeneous list whose elements are of type 'elttype' + * and where elements are separated by space. The list ends + * before the first semicolon. + */ +isc_result_t +cfg_parse_spacelist(cfg_parser_t *pctx, const cfg_type_t *listtype, + cfg_obj_t **ret) +{ + cfg_obj_t *listobj = NULL; + const cfg_type_t *listof = listtype->of; + isc_result_t result; + + REQUIRE(pctx != NULL); + REQUIRE(listtype != NULL); + REQUIRE(ret != NULL && *ret == NULL); + + CHECK(cfg_create_list(pctx, listtype, &listobj)); + + for (;;) { + cfg_listelt_t *elt = NULL; + + CHECK(cfg_peektoken(pctx, 0)); + if (pctx->token.type == isc_tokentype_special && + pctx->token.value.as_char == ';') + break; + CHECK(cfg_parse_listelt(pctx, listof, &elt)); + ISC_LIST_APPEND(listobj->value.list, elt, link); + } + *ret = listobj; + return (ISC_R_SUCCESS); + + cleanup: + CLEANUP_OBJ(listobj); + return (result); +} + +void +cfg_print_spacelist(cfg_printer_t *pctx, const cfg_obj_t *obj) { + const cfg_list_t *list = &obj->value.list; + const cfg_listelt_t *elt; + + REQUIRE(pctx != NULL); + REQUIRE(obj != NULL); + + for (elt = ISC_LIST_HEAD(*list); + elt != NULL; + elt = ISC_LIST_NEXT(elt, link)) { + cfg_print_obj(pctx, elt->obj); + if (ISC_LIST_NEXT(elt, link) != NULL) + cfg_print_cstr(pctx, " "); + } +} + +bool +cfg_obj_islist(const cfg_obj_t *obj) { + REQUIRE(obj != NULL); + return (obj->type->rep == &cfg_rep_list); +} + +const cfg_listelt_t * +cfg_list_first(const cfg_obj_t *obj) { + REQUIRE(obj == NULL || obj->type->rep == &cfg_rep_list); + if (obj == NULL) + return (NULL); + return (ISC_LIST_HEAD(obj->value.list)); +} + +const cfg_listelt_t * +cfg_list_next(const cfg_listelt_t *elt) { + REQUIRE(elt != NULL); + return (ISC_LIST_NEXT(elt, link)); +} + +/* + * Return the length of a list object. If obj is NULL or is not + * a list, return 0. + */ +unsigned int +cfg_list_length(const cfg_obj_t *obj, bool recurse) { + const cfg_listelt_t *elt; + unsigned int count = 0; + + if (obj == NULL || !cfg_obj_islist(obj)) + return (0U); + for (elt = cfg_list_first(obj); + elt != NULL; + elt = cfg_list_next(elt)) { + if (recurse && cfg_obj_islist(elt->obj)) { + count += cfg_list_length(elt->obj, recurse); + } else { + count++; + } + } + return (count); +} + +cfg_obj_t * +cfg_listelt_value(const cfg_listelt_t *elt) { + REQUIRE(elt != NULL); + return (elt->obj); +} + +/* + * Maps. + */ + +/* + * Parse a map body. That's something like + * + * "foo 1; bar { glub; }; zap true; zap false;" + * + * i.e., a sequence of option names followed by values and + * terminated by semicolons. Used for the top level of + * the named.conf syntax, as well as for the body of the + * options, view, zone, and other statements. + */ +isc_result_t +cfg_parse_mapbody(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) +{ + const cfg_clausedef_t * const *clausesets = type->of; + isc_result_t result; + const cfg_clausedef_t * const *clauseset; + const cfg_clausedef_t *clause; + cfg_obj_t *value = NULL; + cfg_obj_t *obj = NULL; + cfg_obj_t *eltobj = NULL; + cfg_obj_t *includename = NULL; + isc_symvalue_t symval; + cfg_list_t *list = NULL; + + REQUIRE(pctx != NULL); + REQUIRE(type != NULL); + REQUIRE(ret != NULL && *ret == NULL); + + CHECK(create_map(pctx, type, &obj)); + + obj->value.map.clausesets = clausesets; + + for (;;) { + cfg_listelt_t *elt; + + redo: + /* + * Parse the option name and see if it is known. + */ + CHECK(cfg_gettoken(pctx, 0)); + + if (pctx->token.type != isc_tokentype_string) { + cfg_ungettoken(pctx); + break; + } + + /* + * We accept "include" statements wherever a map body + * clause can occur. + */ + if (strcasecmp(TOKEN_STRING(pctx), "include") == 0) { + /* + * Turn the file name into a temporary configuration + * object just so that it is not overwritten by the + * semicolon token. + */ + CHECK(cfg_parse_obj(pctx, &cfg_type_qstring, &includename)); + CHECK(parse_semicolon(pctx)); + CHECK(parser_openfile(pctx, includename-> + value.string.base)); + cfg_obj_destroy(pctx, &includename); + goto redo; + } + + clause = NULL; + for (clauseset = clausesets; *clauseset != NULL; clauseset++) { + for (clause = *clauseset; + clause->name != NULL; + clause++) { + if (strcasecmp(TOKEN_STRING(pctx), + clause->name) == 0) + goto done; + } + } + done: + if (clause == NULL || clause->name == NULL) { + cfg_parser_error(pctx, CFG_LOG_NOPREP, + "unknown option"); + /* + * Try to recover by parsing this option as an unknown + * option and discarding it. + */ + CHECK(cfg_parse_obj(pctx, &cfg_type_unsupported, + &eltobj)); + cfg_obj_destroy(pctx, &eltobj); + CHECK(parse_semicolon(pctx)); + continue; + } + + /* Clause is known. */ + + /* Issue warnings if appropriate */ + if ((pctx->flags & CFG_PCTX_NODEPRECATED) == 0 && + (clause->flags & CFG_CLAUSEFLAG_DEPRECATED) != 0) + { + cfg_parser_warning(pctx, 0, "option '%s' is deprecated", + clause->name); + } + if ((clause->flags & CFG_CLAUSEFLAG_OBSOLETE) != 0) { + cfg_parser_warning(pctx, 0, "option '%s' is obsolete", + clause->name); + } + if ((clause->flags & CFG_CLAUSEFLAG_NOTIMP) != 0) { + cfg_parser_warning(pctx, 0, "option '%s' is " + "not implemented", clause->name); + } + if ((clause->flags & CFG_CLAUSEFLAG_NYI) != 0) { + cfg_parser_warning(pctx, 0, "option '%s' is " + "not implemented", clause->name); + } + if ((clause->flags & CFG_CLAUSEFLAG_NOOP) != 0) { + cfg_parser_warning(pctx, 0, "option '%s' was not " + "enabled at compile time " + "(ignored)", clause->name); + } + + if ((clause->flags & CFG_CLAUSEFLAG_NOTCONFIGURED) != 0) { + cfg_parser_warning(pctx, 0, "option '%s' was not " + "enabled at compile time", + clause->name); + result = ISC_R_FAILURE; + goto cleanup; + } + + /* + * Don't log options with CFG_CLAUSEFLAG_NEWDEFAULT + * set here - we need to log the *lack* of such an option, + * not its presence. + */ + + /* See if the clause already has a value; if not create one. */ + result = isc_symtab_lookup(obj->value.map.symtab, + clause->name, 0, &symval); + + if ((clause->flags & CFG_CLAUSEFLAG_MULTI) != 0) { + /* Multivalued clause */ + cfg_obj_t *listobj = NULL; + if (result == ISC_R_NOTFOUND) { + CHECK(cfg_create_list(pctx, + &cfg_type_implicitlist, + &listobj)); + symval.as_pointer = listobj; + result = isc_symtab_define(obj->value. + map.symtab, + clause->name, + 1, symval, + isc_symexists_reject); + if (result != ISC_R_SUCCESS) { + cfg_parser_error(pctx, CFG_LOG_NEAR, + "isc_symtab_define(%s) " + "failed", clause->name); + isc_mem_put(pctx->mctx, list, + sizeof(cfg_list_t)); + goto cleanup; + } + } else { + INSIST(result == ISC_R_SUCCESS); + listobj = symval.as_pointer; + } + + elt = NULL; + CHECK(cfg_parse_listelt(pctx, clause->type, &elt)); + CHECK(parse_semicolon(pctx)); + + ISC_LIST_APPEND(listobj->value.list, elt, link); + } else { + /* Single-valued clause */ + if (result == ISC_R_NOTFOUND) { + bool callback = + (clause->flags & CFG_CLAUSEFLAG_CALLBACK); + CHECK(parse_symtab_elt(pctx, clause->name, + clause->type, + obj->value.map.symtab, + callback)); + CHECK(parse_semicolon(pctx)); + } else if (result == ISC_R_SUCCESS) { + cfg_parser_error(pctx, CFG_LOG_NEAR, "'%s' redefined", + clause->name); + result = ISC_R_EXISTS; + goto cleanup; + } else { + cfg_parser_error(pctx, CFG_LOG_NEAR, + "isc_symtab_define() failed"); + goto cleanup; + } + } + } + + + *ret = obj; + return (ISC_R_SUCCESS); + + cleanup: + CLEANUP_OBJ(value); + CLEANUP_OBJ(obj); + CLEANUP_OBJ(eltobj); + CLEANUP_OBJ(includename); + return (result); +} + +static isc_result_t +parse_symtab_elt(cfg_parser_t *pctx, const char *name, + cfg_type_t *elttype, isc_symtab_t *symtab, + bool callback) +{ + isc_result_t result; + cfg_obj_t *obj = NULL; + isc_symvalue_t symval; + + CHECK(cfg_parse_obj(pctx, elttype, &obj)); + + if (callback && pctx->callback != NULL) + CHECK(pctx->callback(name, obj, pctx->callbackarg)); + + symval.as_pointer = obj; + CHECK(isc_symtab_define(symtab, name, + 1, symval, + isc_symexists_reject)); + return (ISC_R_SUCCESS); + + cleanup: + CLEANUP_OBJ(obj); + return (result); +} + +/* + * Parse a map; e.g., "{ foo 1; bar { glub; }; zap true; zap false; }" + */ +isc_result_t +cfg_parse_map(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) { + isc_result_t result; + + REQUIRE(pctx != NULL); + REQUIRE(type != NULL); + REQUIRE(ret != NULL && *ret == NULL); + + CHECK(cfg_parse_special(pctx, '{')); + CHECK(cfg_parse_mapbody(pctx, type, ret)); + CHECK(cfg_parse_special(pctx, '}')); + cleanup: + return (result); +} + +/* + * Subroutine for cfg_parse_named_map() and cfg_parse_addressed_map(). + */ +static isc_result_t +parse_any_named_map(cfg_parser_t *pctx, cfg_type_t *nametype, + const cfg_type_t *type, cfg_obj_t **ret) +{ + isc_result_t result; + cfg_obj_t *idobj = NULL; + cfg_obj_t *mapobj = NULL; + + REQUIRE(pctx != NULL); + REQUIRE(nametype != NULL); + REQUIRE(type != NULL); + REQUIRE(ret != NULL && *ret == NULL); + + CHECK(cfg_parse_obj(pctx, nametype, &idobj)); + CHECK(cfg_parse_map(pctx, type, &mapobj)); + mapobj->value.map.id = idobj; + *ret = mapobj; + return (result); + cleanup: + CLEANUP_OBJ(idobj); + CLEANUP_OBJ(mapobj); + return (result); +} + +/* + * Parse a map identified by a string name. E.g., "name { foo 1; }". + * Used for the "key" and "channel" statements. + */ +isc_result_t +cfg_parse_named_map(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) { + return (parse_any_named_map(pctx, &cfg_type_astring, type, ret)); +} + +/* + * Parse a map identified by a network address. + * Used to be used for the "server" statement. + */ +isc_result_t +cfg_parse_addressed_map(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) { + return (parse_any_named_map(pctx, &cfg_type_netaddr, type, ret)); +} + +/* + * Parse a map identified by a network prefix. + * Used for the "server" statement. + */ +isc_result_t +cfg_parse_netprefix_map(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) { + return (parse_any_named_map(pctx, &cfg_type_netprefix, type, ret)); +} + +static void +print_symval(cfg_printer_t *pctx, const char *name, cfg_obj_t *obj) { + if ((pctx->flags & CFG_PRINTER_ONELINE) == 0) + cfg_print_indent(pctx); + + cfg_print_cstr(pctx, name); + cfg_print_cstr(pctx, " "); + cfg_print_obj(pctx, obj); + + if ((pctx->flags & CFG_PRINTER_ONELINE) == 0) + cfg_print_cstr(pctx, ";\n"); + else + cfg_print_cstr(pctx, "; "); +} + +void +cfg_print_mapbody(cfg_printer_t *pctx, const cfg_obj_t *obj) { + isc_result_t result = ISC_R_SUCCESS; + const cfg_clausedef_t * const *clauseset; + + REQUIRE(pctx != NULL); + REQUIRE(obj != NULL); + + for (clauseset = obj->value.map.clausesets; + *clauseset != NULL; + clauseset++) + { + isc_symvalue_t symval; + const cfg_clausedef_t *clause; + + for (clause = *clauseset; + clause->name != NULL; + clause++) { + result = isc_symtab_lookup(obj->value.map.symtab, + clause->name, 0, &symval); + if (result == ISC_R_SUCCESS) { + cfg_obj_t *symobj = symval.as_pointer; + if (symobj->type == &cfg_type_implicitlist) { + /* Multivalued. */ + cfg_list_t *list = &symobj->value.list; + cfg_listelt_t *elt; + for (elt = ISC_LIST_HEAD(*list); + elt != NULL; + elt = ISC_LIST_NEXT(elt, link)) { + print_symval(pctx, + clause->name, + elt->obj); + } + } else { + /* Single-valued. */ + print_symval(pctx, clause->name, + symobj); + } + } else if (result == ISC_R_NOTFOUND) { + ; /* do nothing */ + } else { + INSIST(0); + } + } + } +} + +static struct flagtext { + unsigned int flag; + const char *text; +} flagtexts[] = { + { CFG_CLAUSEFLAG_NOTIMP, "not implemented" }, + { CFG_CLAUSEFLAG_NYI, "not yet implemented" }, + { CFG_CLAUSEFLAG_OBSOLETE, "obsolete" }, + { CFG_CLAUSEFLAG_NEWDEFAULT, "default changed" }, + { CFG_CLAUSEFLAG_TESTONLY, "test only" }, + { CFG_CLAUSEFLAG_NOTCONFIGURED, "not configured" }, + { CFG_CLAUSEFLAG_MULTI, "may occur multiple times" }, + { CFG_CLAUSEFLAG_EXPERIMENTAL, "experimental" }, + { CFG_CLAUSEFLAG_NOOP, "non-operational" }, + { 0, NULL } +}; + +void +cfg_print_clauseflags(cfg_printer_t *pctx, unsigned int flags) { + struct flagtext *p; + bool first = true; + for (p = flagtexts; p->flag != 0; p++) { + if ((flags & p->flag) != 0) { + if (first) + cfg_print_cstr(pctx, " // "); + else + cfg_print_cstr(pctx, ", "); + cfg_print_cstr(pctx, p->text); + first = false; + } + } +} + +void +cfg_doc_mapbody(cfg_printer_t *pctx, const cfg_type_t *type) { + const cfg_clausedef_t * const *clauseset; + const cfg_clausedef_t *clause; + + REQUIRE(pctx != NULL); + REQUIRE(type != NULL); + + for (clauseset = type->of; *clauseset != NULL; clauseset++) { + for (clause = *clauseset; clause->name != NULL; clause++) { + cfg_print_cstr(pctx, clause->name); + cfg_print_cstr(pctx, " "); + cfg_doc_obj(pctx, clause->type); + cfg_print_cstr(pctx, ";"); + cfg_print_clauseflags(pctx, clause->flags); + cfg_print_cstr(pctx, "\n\n"); + } + } +} + +void +cfg_print_map(cfg_printer_t *pctx, const cfg_obj_t *obj) { + REQUIRE(pctx != NULL); + REQUIRE(obj != NULL); + + if (obj->value.map.id != NULL) { + cfg_print_obj(pctx, obj->value.map.id); + cfg_print_cstr(pctx, " "); + } + print_open(pctx); + cfg_print_mapbody(pctx, obj); + print_close(pctx); +} + +void +cfg_doc_map(cfg_printer_t *pctx, const cfg_type_t *type) { + const cfg_clausedef_t * const *clauseset; + const cfg_clausedef_t *clause; + + REQUIRE(pctx != NULL); + REQUIRE(type != NULL); + + if (type->parse == cfg_parse_named_map) { + cfg_doc_obj(pctx, &cfg_type_astring); + cfg_print_cstr(pctx, " "); + } else if (type->parse == cfg_parse_addressed_map) { + cfg_doc_obj(pctx, &cfg_type_netaddr); + cfg_print_cstr(pctx, " "); + } else if (type->parse == cfg_parse_netprefix_map) { + cfg_doc_obj(pctx, &cfg_type_netprefix); + cfg_print_cstr(pctx, " "); + } + + print_open(pctx); + + for (clauseset = type->of; *clauseset != NULL; clauseset++) { + for (clause = *clauseset; clause->name != NULL; clause++) { + cfg_print_indent(pctx); + cfg_print_cstr(pctx, clause->name); + if (clause->type->print != cfg_print_void) + cfg_print_cstr(pctx, " "); + cfg_doc_obj(pctx, clause->type); + cfg_print_cstr(pctx, ";"); + cfg_print_clauseflags(pctx, clause->flags); + cfg_print_cstr(pctx, "\n"); + } + } + print_close(pctx); +} + +bool +cfg_obj_ismap(const cfg_obj_t *obj) { + REQUIRE(obj != NULL); + return (obj->type->rep == &cfg_rep_map); +} + +isc_result_t +cfg_map_get(const cfg_obj_t *mapobj, const char* name, const cfg_obj_t **obj) { + isc_result_t result; + isc_symvalue_t val; + const cfg_map_t *map; + + REQUIRE(mapobj != NULL && mapobj->type->rep == &cfg_rep_map); + REQUIRE(name != NULL); + REQUIRE(obj != NULL && *obj == NULL); + + map = &mapobj->value.map; + + result = isc_symtab_lookup(map->symtab, name, MAP_SYM, &val); + if (result != ISC_R_SUCCESS) + return (result); + *obj = val.as_pointer; + return (ISC_R_SUCCESS); +} + +const cfg_obj_t * +cfg_map_getname(const cfg_obj_t *mapobj) { + REQUIRE(mapobj != NULL && mapobj->type->rep == &cfg_rep_map); + return (mapobj->value.map.id); +} + +unsigned int +cfg_map_count(const cfg_obj_t *mapobj) { + const cfg_map_t *map; + + REQUIRE(mapobj != NULL && mapobj->type->rep == &cfg_rep_map); + + map = &mapobj->value.map; + return (isc_symtab_count(map->symtab)); +} + +const char * +cfg_map_firstclause(const cfg_type_t *map, const void **clauses, + unsigned int *idx) +{ + cfg_clausedef_t * const * clauseset; + + REQUIRE(map != NULL && map->rep == &cfg_rep_map); + REQUIRE(idx != NULL); + REQUIRE(clauses != NULL && *clauses == NULL); + + clauseset = map->of; + if (*clauseset == NULL) { + return (NULL); + } + *clauses = *clauseset; + *idx = 0; + while ((*clauseset)[*idx].name == NULL) { + *clauses = (*++clauseset); + if (*clauses == NULL) + return (NULL); + } + return ((*clauseset)[*idx].name); +} + +const char * +cfg_map_nextclause(const cfg_type_t *map, const void **clauses, + unsigned int *idx) +{ + cfg_clausedef_t * const * clauseset; + + REQUIRE(map != NULL && map->rep == &cfg_rep_map); + REQUIRE(idx != NULL); + REQUIRE(clauses != NULL && *clauses != NULL); + + clauseset = map->of; + while (*clauseset != NULL && *clauseset != *clauses) { + clauseset++; + } + INSIST(*clauseset == *clauses); + (*idx)++; + while ((*clauseset)[*idx].name == NULL) { + *idx = 0; + *clauses = (*++clauseset); + if (*clauses == NULL) + return (NULL); + } + return ((*clauseset)[*idx].name); +} + +/* Parse an arbitrary token, storing its raw text representation. */ +static isc_result_t +parse_token(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) { + cfg_obj_t *obj = NULL; + isc_result_t result; + isc_region_t r; + + UNUSED(type); + + CHECK(cfg_create_obj(pctx, &cfg_type_token, &obj)); + CHECK(cfg_gettoken(pctx, CFG_LEXOPT_QSTRING)); + if (pctx->token.type == isc_tokentype_eof) { + cfg_ungettoken(pctx); + result = ISC_R_EOF; + goto cleanup; + } + + isc_lex_getlasttokentext(pctx->lexer, &pctx->token, &r); + + obj->value.string.base = isc_mem_get(pctx->mctx, r.length + 1); + if (obj->value.string.base == NULL) { + result = ISC_R_NOMEMORY; + goto cleanup; + } + obj->value.string.length = r.length; + memmove(obj->value.string.base, r.base, r.length); + obj->value.string.base[r.length] = '\0'; + *ret = obj; + return (result); + + cleanup: + if (obj != NULL) + isc_mem_put(pctx->mctx, obj, sizeof(*obj)); + return (result); +} + +LIBISCCFG_EXTERNAL_DATA cfg_type_t cfg_type_token = { + "token", parse_token, cfg_print_ustring, cfg_doc_terminal, + &cfg_rep_string, NULL +}; + +/* + * An unsupported option. This is just a list of tokens with balanced braces + * ending in a semicolon. + */ + +static isc_result_t +parse_unsupported(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) { + cfg_obj_t *listobj = NULL; + isc_result_t result; + int braces = 0; + + CHECK(cfg_create_list(pctx, type, &listobj)); + + for (;;) { + cfg_listelt_t *elt = NULL; + + CHECK(cfg_peektoken(pctx, 0)); + if (pctx->token.type == isc_tokentype_special) { + if (pctx->token.value.as_char == '{') + braces++; + else if (pctx->token.value.as_char == '}') + braces--; + else if (pctx->token.value.as_char == ';') + if (braces == 0) + break; + } + if (pctx->token.type == isc_tokentype_eof || braces < 0) { + cfg_parser_error(pctx, CFG_LOG_NEAR, "unexpected token"); + result = ISC_R_UNEXPECTEDTOKEN; + goto cleanup; + } + + CHECK(cfg_parse_listelt(pctx, &cfg_type_token, &elt)); + ISC_LIST_APPEND(listobj->value.list, elt, link); + } + INSIST(braces == 0); + *ret = listobj; + return (ISC_R_SUCCESS); + + cleanup: + CLEANUP_OBJ(listobj); + return (result); +} + +LIBISCCFG_EXTERNAL_DATA cfg_type_t cfg_type_unsupported = { + "unsupported", parse_unsupported, cfg_print_spacelist, cfg_doc_terminal, + &cfg_rep_list, NULL +}; + +/* + * Try interpreting the current token as a network address. + * + * If CFG_ADDR_WILDOK is set in flags, "*" can be used as a wildcard + * and at least one of CFG_ADDR_V4OK and CFG_ADDR_V6OK must also be set. The + * "*" is interpreted as the IPv4 wildcard address if CFG_ADDR_V4OK is + * set (including the case where CFG_ADDR_V4OK and CFG_ADDR_V6OK are both set), + * and the IPv6 wildcard address otherwise. + */ +static isc_result_t +token_addr(cfg_parser_t *pctx, unsigned int flags, isc_netaddr_t *na) { + char *s; + struct in_addr in4a; + struct in6_addr in6a; + + if (pctx->token.type != isc_tokentype_string) + return (ISC_R_UNEXPECTEDTOKEN); + + s = TOKEN_STRING(pctx); + if ((flags & CFG_ADDR_WILDOK) != 0 && strcmp(s, "*") == 0) { + if ((flags & CFG_ADDR_V4OK) != 0) { + isc_netaddr_any(na); + return (ISC_R_SUCCESS); + } else if ((flags & CFG_ADDR_V6OK) != 0) { + isc_netaddr_any6(na); + return (ISC_R_SUCCESS); + } else { + INSIST(0); + } + } else { + if ((flags & (CFG_ADDR_V4OK | CFG_ADDR_V4PREFIXOK)) != 0) { + if (inet_pton(AF_INET, s, &in4a) == 1) { + isc_netaddr_fromin(na, &in4a); + return (ISC_R_SUCCESS); + } + } + if ((flags & CFG_ADDR_V4PREFIXOK) != 0 && strlen(s) <= 15U) { + char buf[64]; + int i; + + strlcpy(buf, s, sizeof(buf)); + for (i = 0; i < 3; i++) { + strlcat(buf, ".0", sizeof(buf)); + if (inet_pton(AF_INET, buf, &in4a) == 1) { + isc_netaddr_fromin(na, &in4a); + return (ISC_R_SUCCESS); + } + } + } + if ((flags & CFG_ADDR_V6OK) != 0 && strlen(s) <= 127U) { + char buf[128]; /* see lib/bind9/getaddresses.c */ + char *d; /* zone delimiter */ + uint32_t zone = 0; /* scope zone ID */ + + strlcpy(buf, s, sizeof(buf)); + d = strchr(buf, '%'); + if (d != NULL) + *d = '\0'; + + if (inet_pton(AF_INET6, buf, &in6a) == 1) { + if (d != NULL) { +#ifdef ISC_PLATFORM_HAVESCOPEID + isc_result_t result; + + result = isc_netscope_pton(AF_INET6, + d + 1, + &in6a, + &zone); + if (result != ISC_R_SUCCESS) + return (result); +#else + return (ISC_R_BADADDRESSFORM); +#endif + } + + isc_netaddr_fromin6(na, &in6a); + isc_netaddr_setzone(na, zone); + return (ISC_R_SUCCESS); + } + } + } + return (ISC_R_UNEXPECTEDTOKEN); +} + +isc_result_t +cfg_parse_rawaddr(cfg_parser_t *pctx, unsigned int flags, isc_netaddr_t *na) { + isc_result_t result; + const char *wild = ""; + const char *prefix = ""; + + REQUIRE(pctx != NULL); + REQUIRE(na != NULL); + + CHECK(cfg_gettoken(pctx, 0)); + result = token_addr(pctx, flags, na); + if (result == ISC_R_UNEXPECTEDTOKEN) { + if ((flags & CFG_ADDR_WILDOK) != 0) + wild = " or '*'"; + if ((flags & CFG_ADDR_V4PREFIXOK) != 0) + wild = " or IPv4 prefix"; + if ((flags & CFG_ADDR_MASK) == CFG_ADDR_V4OK) + cfg_parser_error(pctx, CFG_LOG_NEAR, + "expected IPv4 address%s%s", + prefix, wild); + else if ((flags & CFG_ADDR_MASK) == CFG_ADDR_V6OK) + cfg_parser_error(pctx, CFG_LOG_NEAR, + "expected IPv6 address%s%s", + prefix, wild); + else + cfg_parser_error(pctx, CFG_LOG_NEAR, + "expected IP address%s%s", + prefix, wild); + } + cleanup: + return (result); +} + +bool +cfg_lookingat_netaddr(cfg_parser_t *pctx, unsigned int flags) { + isc_result_t result; + isc_netaddr_t na_dummy; + + REQUIRE(pctx != NULL); + + result = token_addr(pctx, flags, &na_dummy); + return (result == ISC_R_SUCCESS); +} + +isc_result_t +cfg_parse_rawport(cfg_parser_t *pctx, unsigned int flags, in_port_t *port) { + isc_result_t result; + + REQUIRE(pctx != NULL); + REQUIRE(port != NULL); + + CHECK(cfg_gettoken(pctx, ISC_LEXOPT_NUMBER)); + + if ((flags & CFG_ADDR_WILDOK) != 0 && + pctx->token.type == isc_tokentype_string && + strcmp(TOKEN_STRING(pctx), "*") == 0) { + *port = 0; + return (ISC_R_SUCCESS); + } + if (pctx->token.type != isc_tokentype_number) { + cfg_parser_error(pctx, CFG_LOG_NEAR, + "expected port number or '*'"); + return (ISC_R_UNEXPECTEDTOKEN); + } + if (pctx->token.value.as_ulong >= 65536U) { + cfg_parser_error(pctx, CFG_LOG_NEAR, + "port number out of range"); + return (ISC_R_UNEXPECTEDTOKEN); + } + *port = (in_port_t)(pctx->token.value.as_ulong); + return (ISC_R_SUCCESS); + cleanup: + return (result); +} + +void +cfg_print_rawaddr(cfg_printer_t *pctx, const isc_netaddr_t *na) { + isc_result_t result; + char text[128]; + isc_buffer_t buf; + + REQUIRE(pctx != NULL); + REQUIRE(na != NULL); + + isc_buffer_init(&buf, text, sizeof(text)); + result = isc_netaddr_totext(na, &buf); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + cfg_print_chars(pctx, isc_buffer_base(&buf), + isc_buffer_usedlength(&buf)); +} + +isc_result_t +cfg_parse_dscp(cfg_parser_t *pctx, isc_dscp_t *dscp) { + isc_result_t result; + + REQUIRE(pctx != NULL); + REQUIRE(dscp != NULL); + + CHECK(cfg_gettoken(pctx, ISC_LEXOPT_NUMBER | ISC_LEXOPT_CNUMBER)); + + if (pctx->token.type != isc_tokentype_number) { + cfg_parser_error(pctx, CFG_LOG_NEAR, + "expected number"); + return (ISC_R_UNEXPECTEDTOKEN); + } + if (pctx->token.value.as_ulong > 63U) { + cfg_parser_error(pctx, CFG_LOG_NEAR, + "dscp out of range"); + return (ISC_R_RANGE); + } + *dscp = (isc_dscp_t)(pctx->token.value.as_ulong); + return (ISC_R_SUCCESS); + cleanup: + return (result); +} + +/* netaddr */ + +static unsigned int netaddr_flags = CFG_ADDR_V4OK | CFG_ADDR_V6OK; +static unsigned int netaddr4_flags = CFG_ADDR_V4OK; +static unsigned int netaddr4wild_flags = CFG_ADDR_V4OK | CFG_ADDR_WILDOK; +static unsigned int netaddr6_flags = CFG_ADDR_V6OK; +static unsigned int netaddr6wild_flags = CFG_ADDR_V6OK | CFG_ADDR_WILDOK; + +static isc_result_t +parse_netaddr(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) { + isc_result_t result; + cfg_obj_t *obj = NULL; + isc_netaddr_t netaddr; + unsigned int flags = *(const unsigned int *)type->of; + + CHECK(cfg_create_obj(pctx, type, &obj)); + CHECK(cfg_parse_rawaddr(pctx, flags, &netaddr)); + isc_sockaddr_fromnetaddr(&obj->value.sockaddr, &netaddr, 0); + *ret = obj; + return (ISC_R_SUCCESS); + cleanup: + CLEANUP_OBJ(obj); + return (result); +} + +static void +cfg_doc_netaddr(cfg_printer_t *pctx, const cfg_type_t *type) { + const unsigned int *flagp = type->of; + int n = 0; + if (*flagp != CFG_ADDR_V4OK && *flagp != CFG_ADDR_V6OK) + cfg_print_cstr(pctx, "( "); + if (*flagp & CFG_ADDR_V4OK) { + cfg_print_cstr(pctx, "<ipv4_address>"); + n++; + } + if (*flagp & CFG_ADDR_V6OK) { + if (n != 0) + cfg_print_cstr(pctx, " | "); + cfg_print_cstr(pctx, "<ipv6_address>"); + n++; + } + if (*flagp & CFG_ADDR_WILDOK) { + if (n != 0) + cfg_print_cstr(pctx, " | "); + cfg_print_cstr(pctx, "*"); + n++; + POST(n); + } + if (*flagp != CFG_ADDR_V4OK && *flagp != CFG_ADDR_V6OK) + cfg_print_cstr(pctx, " )"); +} + +LIBISCCFG_EXTERNAL_DATA cfg_type_t cfg_type_netaddr = { + "netaddr", parse_netaddr, cfg_print_sockaddr, cfg_doc_netaddr, + &cfg_rep_sockaddr, &netaddr_flags +}; + +LIBISCCFG_EXTERNAL_DATA cfg_type_t cfg_type_netaddr4 = { + "netaddr4", parse_netaddr, cfg_print_sockaddr, cfg_doc_netaddr, + &cfg_rep_sockaddr, &netaddr4_flags +}; + +LIBISCCFG_EXTERNAL_DATA cfg_type_t cfg_type_netaddr4wild = { + "netaddr4wild", parse_netaddr, cfg_print_sockaddr, cfg_doc_netaddr, + &cfg_rep_sockaddr, &netaddr4wild_flags +}; + +LIBISCCFG_EXTERNAL_DATA cfg_type_t cfg_type_netaddr6 = { + "netaddr6", parse_netaddr, cfg_print_sockaddr, cfg_doc_netaddr, + &cfg_rep_sockaddr, &netaddr6_flags +}; + +LIBISCCFG_EXTERNAL_DATA cfg_type_t cfg_type_netaddr6wild = { + "netaddr6wild", parse_netaddr, cfg_print_sockaddr, cfg_doc_netaddr, + &cfg_rep_sockaddr, &netaddr6wild_flags +}; + +/* netprefix */ + +isc_result_t +cfg_parse_netprefix(cfg_parser_t *pctx, const cfg_type_t *type, + cfg_obj_t **ret) +{ + cfg_obj_t *obj = NULL; + isc_result_t result; + isc_netaddr_t netaddr; + unsigned int addrlen = 0, prefixlen; + + REQUIRE(pctx != NULL); + REQUIRE(ret != NULL && *ret == NULL); + + UNUSED(type); + + CHECK(cfg_parse_rawaddr(pctx, CFG_ADDR_V4OK | CFG_ADDR_V4PREFIXOK | + CFG_ADDR_V6OK, &netaddr)); + switch (netaddr.family) { + case AF_INET: + addrlen = 32; + break; + case AF_INET6: + addrlen = 128; + break; + default: + INSIST(0); + break; + } + CHECK(cfg_peektoken(pctx, 0)); + if (pctx->token.type == isc_tokentype_special && + pctx->token.value.as_char == '/') { + CHECK(cfg_gettoken(pctx, 0)); /* read "/" */ + CHECK(cfg_gettoken(pctx, ISC_LEXOPT_NUMBER)); + if (pctx->token.type != isc_tokentype_number) { + cfg_parser_error(pctx, CFG_LOG_NEAR, + "expected prefix length"); + return (ISC_R_UNEXPECTEDTOKEN); + } + prefixlen = pctx->token.value.as_ulong; + if (prefixlen > addrlen) { + cfg_parser_error(pctx, CFG_LOG_NOPREP, + "invalid prefix length"); + return (ISC_R_RANGE); + } + } else { + prefixlen = addrlen; + } + CHECK(cfg_create_obj(pctx, &cfg_type_netprefix, &obj)); + obj->value.netprefix.address = netaddr; + obj->value.netprefix.prefixlen = prefixlen; + *ret = obj; + return (ISC_R_SUCCESS); + cleanup: + cfg_parser_error(pctx, CFG_LOG_NEAR, "expected network prefix"); + return (result); +} + +static void +print_netprefix(cfg_printer_t *pctx, const cfg_obj_t *obj) { + const cfg_netprefix_t *p = &obj->value.netprefix; + + cfg_print_rawaddr(pctx, &p->address); + cfg_print_cstr(pctx, "/"); + cfg_print_rawuint(pctx, p->prefixlen); +} + +bool +cfg_obj_isnetprefix(const cfg_obj_t *obj) { + REQUIRE(obj != NULL); + return (obj->type->rep == &cfg_rep_netprefix); +} + +void +cfg_obj_asnetprefix(const cfg_obj_t *obj, isc_netaddr_t *netaddr, + unsigned int *prefixlen) +{ + REQUIRE(obj != NULL && obj->type->rep == &cfg_rep_netprefix); + REQUIRE(netaddr != NULL); + REQUIRE(prefixlen != NULL); + + *netaddr = obj->value.netprefix.address; + *prefixlen = obj->value.netprefix.prefixlen; +} + +LIBISCCFG_EXTERNAL_DATA cfg_type_t cfg_type_netprefix = { + "netprefix", cfg_parse_netprefix, print_netprefix, cfg_doc_terminal, + &cfg_rep_netprefix, NULL +}; + +static isc_result_t +parse_sockaddrsub(cfg_parser_t *pctx, const cfg_type_t *type, + int flags, cfg_obj_t **ret) +{ + isc_result_t result; + isc_netaddr_t netaddr; + in_port_t port = 0; + isc_dscp_t dscp = -1; + cfg_obj_t *obj = NULL; + int have_port = 0, have_dscp = 0; + + CHECK(cfg_create_obj(pctx, type, &obj)); + CHECK(cfg_parse_rawaddr(pctx, flags, &netaddr)); + for (;;) { + CHECK(cfg_peektoken(pctx, 0)); + if (pctx->token.type == isc_tokentype_string) { + if (strcasecmp(TOKEN_STRING(pctx), "port") == 0) { + CHECK(cfg_gettoken(pctx, 0)); /* read "port" */ + CHECK(cfg_parse_rawport(pctx, flags, &port)); + ++have_port; + } else if ((flags & CFG_ADDR_DSCPOK) != 0 && + strcasecmp(TOKEN_STRING(pctx), "dscp") == 0) + { + CHECK(cfg_gettoken(pctx, 0)); /* read "dscp" */ + CHECK(cfg_parse_dscp(pctx, &dscp)); + ++have_dscp; + } else + break; + } else + break; + } + if (have_port > 1) { + cfg_parser_error(pctx, 0, "expected at most one port"); + result = ISC_R_UNEXPECTEDTOKEN; + goto cleanup; + } + + if (have_dscp > 1) { + cfg_parser_error(pctx, 0, "expected at most one dscp"); + result = ISC_R_UNEXPECTEDTOKEN; + goto cleanup; + } + isc_sockaddr_fromnetaddr(&obj->value.sockaddr, &netaddr, port); + obj->value.sockaddrdscp.dscp = dscp; + *ret = obj; + return (ISC_R_SUCCESS); + + cleanup: + CLEANUP_OBJ(obj); + return (result); +} + +static unsigned int sockaddr_flags = CFG_ADDR_V4OK | CFG_ADDR_V6OK; +LIBISCCFG_EXTERNAL_DATA cfg_type_t cfg_type_sockaddr = { + "sockaddr", cfg_parse_sockaddr, cfg_print_sockaddr, cfg_doc_sockaddr, + &cfg_rep_sockaddr, &sockaddr_flags +}; + +static unsigned int sockaddrdscp_flags = CFG_ADDR_V4OK | CFG_ADDR_V6OK | + CFG_ADDR_DSCPOK; +LIBISCCFG_EXTERNAL_DATA cfg_type_t cfg_type_sockaddrdscp = { + "sockaddr", cfg_parse_sockaddr, cfg_print_sockaddr, cfg_doc_sockaddr, + &cfg_rep_sockaddr, &sockaddrdscp_flags +}; + +isc_result_t +cfg_parse_sockaddr(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) { + const unsigned int *flagp; + + REQUIRE(pctx != NULL); + REQUIRE(type != NULL); + REQUIRE(ret != NULL && *ret == NULL); + + flagp = type->of; + + return (parse_sockaddrsub(pctx, &cfg_type_sockaddr, *flagp, ret)); +} + +void +cfg_print_sockaddr(cfg_printer_t *pctx, const cfg_obj_t *obj) { + isc_netaddr_t netaddr; + in_port_t port; + char buf[ISC_NETADDR_FORMATSIZE]; + + REQUIRE(pctx != NULL); + REQUIRE(obj != NULL); + + isc_netaddr_fromsockaddr(&netaddr, &obj->value.sockaddr); + isc_netaddr_format(&netaddr, buf, sizeof(buf)); + cfg_print_cstr(pctx, buf); + port = isc_sockaddr_getport(&obj->value.sockaddr); + if (port != 0) { + cfg_print_cstr(pctx, " port "); + cfg_print_rawuint(pctx, port); + } + if (obj->value.sockaddrdscp.dscp != -1) { + cfg_print_cstr(pctx, " dscp "); + cfg_print_rawuint(pctx, obj->value.sockaddrdscp.dscp); + } +} + +void +cfg_doc_sockaddr(cfg_printer_t *pctx, const cfg_type_t *type) { + const unsigned int *flagp = type->of; + int n = 0; + + REQUIRE(pctx != NULL); + REQUIRE(type != NULL); + + cfg_print_cstr(pctx, "( "); + if (*flagp & CFG_ADDR_V4OK) { + cfg_print_cstr(pctx, "<ipv4_address>"); + n++; + } + if (*flagp & CFG_ADDR_V6OK) { + if (n != 0) + cfg_print_cstr(pctx, " | "); + cfg_print_cstr(pctx, "<ipv6_address>"); + n++; + } + if (*flagp & CFG_ADDR_WILDOK) { + if (n != 0) + cfg_print_cstr(pctx, " | "); + cfg_print_cstr(pctx, "*"); + n++; + POST(n); + } + cfg_print_cstr(pctx, " ) "); + if (*flagp & CFG_ADDR_WILDOK) { + cfg_print_cstr(pctx, "[ port ( <integer> | * ) ]"); + } else { + cfg_print_cstr(pctx, "[ port <integer> ]"); + } + if ((*flagp & CFG_ADDR_DSCPOK) != 0) { + cfg_print_cstr(pctx, " [ dscp <integer> ]"); + } +} + +bool +cfg_obj_issockaddr(const cfg_obj_t *obj) { + REQUIRE(obj != NULL); + return (obj->type->rep == &cfg_rep_sockaddr); +} + +const isc_sockaddr_t * +cfg_obj_assockaddr(const cfg_obj_t *obj) { + REQUIRE(obj != NULL && obj->type->rep == &cfg_rep_sockaddr); + return (&obj->value.sockaddr); +} + +isc_dscp_t +cfg_obj_getdscp(const cfg_obj_t *obj) { + REQUIRE(obj != NULL && obj->type->rep == &cfg_rep_sockaddr); + return (obj->value.sockaddrdscp.dscp); +} + +isc_result_t +cfg_gettoken(cfg_parser_t *pctx, int options) { + isc_result_t result; + + REQUIRE(pctx != NULL); + + if (pctx->seen_eof) + return (ISC_R_SUCCESS); + + options |= (ISC_LEXOPT_EOF | ISC_LEXOPT_NOMORE); + + redo: + pctx->token.type = isc_tokentype_unknown; + result = isc_lex_gettoken(pctx->lexer, options, &pctx->token); + pctx->ungotten = false; + pctx->line = isc_lex_getsourceline(pctx->lexer); + + switch (result) { + case ISC_R_SUCCESS: + if (pctx->token.type == isc_tokentype_eof) { + result = isc_lex_close(pctx->lexer); + INSIST(result == ISC_R_NOMORE || + result == ISC_R_SUCCESS); + + if (isc_lex_getsourcename(pctx->lexer) != NULL) { + /* + * Closed an included file, not the main file. + */ + cfg_listelt_t *elt; + elt = ISC_LIST_TAIL(pctx->open_files-> + value.list); + INSIST(elt != NULL); + ISC_LIST_UNLINK(pctx->open_files-> + value.list, elt, link); + ISC_LIST_APPEND(pctx->closed_files-> + value.list, elt, link); + goto redo; + } + pctx->seen_eof = true; + } + break; + + case ISC_R_NOSPACE: + /* More understandable than "ran out of space". */ + cfg_parser_error(pctx, CFG_LOG_NEAR, "token too big"); + break; + + case ISC_R_IOERROR: + cfg_parser_error(pctx, 0, "%s", + isc_result_totext(result)); + break; + + default: + cfg_parser_error(pctx, CFG_LOG_NEAR, "%s", + isc_result_totext(result)); + break; + } + return (result); +} + +void +cfg_ungettoken(cfg_parser_t *pctx) { + REQUIRE(pctx != NULL); + + if (pctx->seen_eof) + return; + isc_lex_ungettoken(pctx->lexer, &pctx->token); + pctx->ungotten = true; +} + +isc_result_t +cfg_peektoken(cfg_parser_t *pctx, int options) { + isc_result_t result; + + REQUIRE(pctx != NULL); + + CHECK(cfg_gettoken(pctx, options)); + cfg_ungettoken(pctx); + cleanup: + return (result); +} + +/* + * Get a string token, accepting both the quoted and the unquoted form. + * Log an error if the next token is not a string. + */ +static isc_result_t +cfg_getstringtoken(cfg_parser_t *pctx) { + isc_result_t result; + + result = cfg_gettoken(pctx, CFG_LEXOPT_QSTRING); + if (result != ISC_R_SUCCESS) + return (result); + + if (pctx->token.type != isc_tokentype_string && + pctx->token.type != isc_tokentype_qstring) { + cfg_parser_error(pctx, CFG_LOG_NEAR, "expected string"); + return (ISC_R_UNEXPECTEDTOKEN); + } + return (ISC_R_SUCCESS); +} + +void +cfg_parser_error(cfg_parser_t *pctx, unsigned int flags, const char *fmt, ...) { + va_list args; + + REQUIRE(pctx != NULL); + REQUIRE(fmt != NULL); + + va_start(args, fmt); + parser_complain(pctx, false, flags, fmt, args); + va_end(args); + pctx->errors++; +} + +void +cfg_parser_warning(cfg_parser_t *pctx, unsigned int flags, const char *fmt, ...) { + va_list args; + + REQUIRE(pctx != NULL); + REQUIRE(fmt != NULL); + + va_start(args, fmt); + parser_complain(pctx, true, flags, fmt, args); + va_end(args); + pctx->warnings++; +} + +#define MAX_LOG_TOKEN 30 /* How much of a token to quote in log messages. */ + +static bool +have_current_file(cfg_parser_t *pctx) { + cfg_listelt_t *elt; + if (pctx->open_files == NULL) + return (false); + + elt = ISC_LIST_TAIL(pctx->open_files->value.list); + if (elt == NULL) + return (false); + + return (true); +} + +static char * +current_file(cfg_parser_t *pctx) { + static char none[] = "none"; + cfg_listelt_t *elt; + cfg_obj_t *fileobj; + + if (!have_current_file(pctx)) + return (none); + + elt = ISC_LIST_TAIL(pctx->open_files->value.list); + if (elt == NULL) /* shouldn't be possible, but... */ + return (none); + + fileobj = elt->obj; + INSIST(fileobj->type == &cfg_type_qstring); + return (fileobj->value.string.base); +} + +static void +parser_complain(cfg_parser_t *pctx, bool is_warning, + unsigned int flags, const char *format, + va_list args) +{ + char tokenbuf[MAX_LOG_TOKEN + 10]; + static char where[ISC_DIR_PATHMAX + 100]; + static char message[2048]; + int level = ISC_LOG_ERROR; + const char *prep = ""; + size_t len; + + if (is_warning) + level = ISC_LOG_WARNING; + + where[0] = '\0'; + if (have_current_file(pctx)) + snprintf(where, sizeof(where), "%s:%u: ", + current_file(pctx), pctx->line); + else if (pctx->buf_name != NULL) + snprintf(where, sizeof(where), "%s: ", pctx->buf_name); + + len = vsnprintf(message, sizeof(message), format, args); +#define ELIPSIS " ... " + if (len >= sizeof(message)) { + message[sizeof(message) - sizeof(ELIPSIS)] = 0; + strlcat(message, ELIPSIS, sizeof(message)); + } + + if ((flags & (CFG_LOG_NEAR|CFG_LOG_BEFORE|CFG_LOG_NOPREP)) != 0) { + isc_region_t r; + + if (pctx->ungotten) + (void)cfg_gettoken(pctx, 0); + + if (pctx->token.type == isc_tokentype_eof) { + snprintf(tokenbuf, sizeof(tokenbuf), "end of file"); + } else if (pctx->token.type == isc_tokentype_unknown) { + flags = 0; + tokenbuf[0] = '\0'; + } else { + isc_lex_getlasttokentext(pctx->lexer, + &pctx->token, &r); + if (r.length > MAX_LOG_TOKEN) + snprintf(tokenbuf, sizeof(tokenbuf), + "'%.*s...'", MAX_LOG_TOKEN, r.base); + else + snprintf(tokenbuf, sizeof(tokenbuf), + "'%.*s'", (int)r.length, r.base); + } + + /* Choose a preposition. */ + if (flags & CFG_LOG_NEAR) + prep = " near "; + else if (flags & CFG_LOG_BEFORE) + prep = " before "; + else + prep = " "; + } else { + tokenbuf[0] = '\0'; + } + isc_log_write(pctx->lctx, CAT, MOD, level, + "%s%s%s%s", where, message, prep, tokenbuf); +} + +void +cfg_obj_log(const cfg_obj_t *obj, isc_log_t *lctx, int level, + const char *fmt, ...) { + va_list ap; + char msgbuf[2048]; + + REQUIRE(obj != NULL); + REQUIRE(fmt != NULL); + + if (! isc_log_wouldlog(lctx, level)) + return; + + va_start(ap, fmt); + vsnprintf(msgbuf, sizeof(msgbuf), fmt, ap); + va_end(ap); + + if (obj->file != NULL) { + isc_log_write(lctx, CAT, MOD, level, + "%s:%u: %s", obj->file, obj->line, msgbuf); + } else { + isc_log_write(lctx, CAT, MOD, level, "%s", msgbuf); + } +} + +const char * +cfg_obj_file(const cfg_obj_t *obj) { + REQUIRE(obj != NULL); + + return (obj->file); +} + +unsigned int +cfg_obj_line(const cfg_obj_t *obj) { + REQUIRE(obj != NULL); + + return (obj->line); +} + +isc_result_t +cfg_create_obj(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) { + isc_result_t result; + cfg_obj_t *obj; + + REQUIRE(pctx != NULL); + REQUIRE(type != NULL); + REQUIRE(ret != NULL && *ret == NULL); + + obj = isc_mem_get(pctx->mctx, sizeof(cfg_obj_t)); + if (obj == NULL) + return (ISC_R_NOMEMORY); + + obj->type = type; + obj->file = current_file(pctx); + obj->line = pctx->line; + obj->pctx = pctx; + + result = isc_refcount_init(&obj->references, 1); + if (result != ISC_R_SUCCESS) { + isc_mem_put(pctx->mctx, obj, sizeof(cfg_obj_t)); + return (result); + } + *ret = obj; + + return (ISC_R_SUCCESS); +} + + +static void +map_symtabitem_destroy(char *key, unsigned int type, + isc_symvalue_t symval, void *userarg) +{ + cfg_obj_t *obj = symval.as_pointer; + cfg_parser_t *pctx = (cfg_parser_t *)userarg; + + UNUSED(key); + UNUSED(type); + + cfg_obj_destroy(pctx, &obj); +} + +static isc_result_t +create_map(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) { + isc_result_t result; + isc_symtab_t *symtab = NULL; + cfg_obj_t *obj = NULL; + + CHECK(cfg_create_obj(pctx, type, &obj)); + CHECK(isc_symtab_create(pctx->mctx, 5, /* XXX */ + map_symtabitem_destroy, + pctx, false, &symtab)); + obj->value.map.symtab = symtab; + obj->value.map.id = NULL; + + *ret = obj; + return (ISC_R_SUCCESS); + + cleanup: + if (obj != NULL) + isc_mem_put(pctx->mctx, obj, sizeof(*obj)); + return (result); +} + +static void +free_map(cfg_parser_t *pctx, cfg_obj_t *obj) { + CLEANUP_OBJ(obj->value.map.id); + isc_symtab_destroy(&obj->value.map.symtab); +} + +bool +cfg_obj_istype(const cfg_obj_t *obj, const cfg_type_t *type) { + + REQUIRE(obj != NULL); + REQUIRE(type != NULL); + + return (obj->type == type); +} + +/* + * Destroy 'obj', a configuration object created in 'pctx'. + */ +void +cfg_obj_destroy(cfg_parser_t *pctx, cfg_obj_t **objp) { + cfg_obj_t *obj; + unsigned int refs; + + REQUIRE(objp != NULL && *objp != NULL); + REQUIRE(pctx != NULL); + + obj = *objp; + + isc_refcount_decrement(&obj->references, &refs); + if (refs == 0) { + obj->type->rep->free(pctx, obj); + isc_refcount_destroy(&obj->references); + isc_mem_put(pctx->mctx, obj, sizeof(cfg_obj_t)); + } + *objp = NULL; +} + +void +cfg_obj_attach(cfg_obj_t *src, cfg_obj_t **dest) { + REQUIRE(src != NULL); + REQUIRE(dest != NULL && *dest == NULL); + + isc_refcount_increment(&src->references, NULL); + *dest = src; +} + +static void +free_noop(cfg_parser_t *pctx, cfg_obj_t *obj) { + UNUSED(pctx); + UNUSED(obj); +} + +void +cfg_doc_obj(cfg_printer_t *pctx, const cfg_type_t *type) { + REQUIRE(pctx != NULL); + REQUIRE(type != NULL); + + type->doc(pctx, type); +} + +void +cfg_doc_terminal(cfg_printer_t *pctx, const cfg_type_t *type) { + REQUIRE(pctx != NULL); + REQUIRE(type != NULL); + + cfg_print_cstr(pctx, "<"); + cfg_print_cstr(pctx, type->name); + cfg_print_cstr(pctx, ">"); +} + +void +cfg_print_grammar(const cfg_type_t *type, + void (*f)(void *closure, const char *text, int textlen), + void *closure) +{ + cfg_printer_t pctx; + + pctx.f = f; + pctx.closure = closure; + pctx.indent = 0; + pctx.flags = 0; + cfg_doc_obj(&pctx, type); +} + +isc_result_t +cfg_parser_mapadd(cfg_parser_t *pctx, cfg_obj_t *mapobj, + cfg_obj_t *obj, const char *clausename) +{ + isc_result_t result = ISC_R_SUCCESS; + const cfg_map_t *map; + isc_symvalue_t symval; + cfg_obj_t *destobj = NULL; + cfg_listelt_t *elt = NULL; + const cfg_clausedef_t * const *clauseset; + const cfg_clausedef_t *clause; + + REQUIRE(pctx != NULL); + REQUIRE(mapobj != NULL && mapobj->type->rep == &cfg_rep_map); + REQUIRE(obj != NULL); + REQUIRE(clausename != NULL); + + map = &mapobj->value.map; + + clause = NULL; + for (clauseset = map->clausesets; *clauseset != NULL; clauseset++) { + for (clause = *clauseset; clause->name != NULL; clause++) { + if (strcasecmp(clause->name, clausename) == 0) { + goto breakout; + } + } + } + + breakout: + if (clause == NULL || clause->name == NULL) + return (ISC_R_FAILURE); + + result = isc_symtab_lookup(map->symtab, clausename, 0, &symval); + if (result == ISC_R_NOTFOUND) { + if ((clause->flags & CFG_CLAUSEFLAG_MULTI) != 0) { + CHECK(cfg_create_list(pctx, &cfg_type_implicitlist, + &destobj)); + CHECK(create_listelt(pctx, &elt)); + cfg_obj_attach(obj, &elt->obj); + ISC_LIST_APPEND(destobj->value.list, elt, link); + symval.as_pointer = destobj; + } else + symval.as_pointer = obj; + + CHECK(isc_symtab_define(map->symtab, clausename, 1, symval, + isc_symexists_reject)); + } else { + cfg_obj_t *destobj2 = symval.as_pointer; + + INSIST(result == ISC_R_SUCCESS); + + if (destobj2->type == &cfg_type_implicitlist) { + CHECK(create_listelt(pctx, &elt)); + cfg_obj_attach(obj, &elt->obj); + ISC_LIST_APPEND(destobj2->value.list, elt, link); + } else + result = ISC_R_EXISTS; + } + + destobj = NULL; + elt = NULL; + + cleanup: + if (elt != NULL) + free_listelt(pctx, elt); + CLEANUP_OBJ(destobj); + + return (result); +} |