/* * BIRD Internet Routing Daemon -- Configuration File Handling * * (c) 1998--2000 Martin Mares * * Can be freely distributed and used under the terms of the GNU GPL. */ #ifndef _BIRD_CONF_H_ #define _BIRD_CONF_H_ #include "sysdep/config.h" #include "lib/ip.h" #include "lib/hash.h" #include "lib/resource.h" #include "lib/timer.h" /* Configuration structure */ struct config { pool *pool; /* Pool the configuration is stored in */ linpool *mem; /* Linear pool containing configuration data */ list protos; /* Configured protocol instances (struct proto_config) */ list tables; /* Configured routing tables (struct rtable_config) */ list logfiles; /* Configured log files (sysdep) */ list tests; /* Configured unit tests (f_bt_test_suite) */ list symbols; /* Configured symbols in config order */ int mrtdump_file; /* Configured MRTDump file (sysdep, fd in unix) */ const char *syslog_name; /* Name used for syslog (NULL -> no syslog) */ struct rtable_config *def_tables[NET_MAX]; /* Default routing tables for each network */ struct iface_patt *router_id_from; /* Configured list of router ID iface patterns */ u32 router_id; /* Our Router ID */ u32 proto_default_debug; /* Default protocol debug mask */ u32 proto_default_mrtdump; /* Default protocol mrtdump mask */ u32 channel_default_debug; /* Default channel debug mask */ struct timeformat tf_route; /* Time format for 'show route' */ struct timeformat tf_proto; /* Time format for 'show protocol' */ struct timeformat tf_log; /* Time format for the logfile */ struct timeformat tf_base; /* Time format for other purposes */ u32 gr_wait; /* Graceful restart wait timeout (sec) */ const char *hostname; /* Hostname */ int cli_debug; /* Tracing of CLI connections and commands */ int latency_debug; /* I/O loop tracks duration of each event */ u32 latency_limit; /* Events with longer duration are logged (us) */ u32 watchdog_warning; /* I/O loop watchdog limit for warning (us) */ u32 watchdog_timeout; /* Watchdog timeout (in seconds, 0 = disabled) */ char *err_msg; /* Parser error message */ int err_lino; /* Line containing error */ int err_chno; /* Character where the parser stopped */ char *err_file_name; /* File name containing error */ char *file_name; /* Name of main configuration file */ int file_fd; /* File descriptor of main configuration file */ HASH(struct symbol) sym_hash; /* Lexer: symbol hash table */ struct config *fallback; /* Link to regular config for CLI parsing */ struct sym_scope *root_scope; /* Scope for root symbols */ int obstacle_count; /* Number of items blocking freeing of this config */ int shutdown; /* This is a pseudo-config for daemon shutdown */ int gr_down; /* This is a pseudo-config for graceful restart */ btime load_time; /* When we've got this configuration */ }; /* Please don't use these variables in protocols. Use proto_config->global instead. */ extern struct config *config; /* Currently active configuration */ extern struct config *new_config; /* Configuration being parsed */ struct config *config_alloc(const char *name); int config_parse(struct config *); int cli_parse(struct config *); void config_free(struct config *); void config_free_old(void); int config_commit(struct config *, int type, uint timeout); int config_confirm(void); int config_undo(void); int config_status(void); btime config_timer_status(void); void config_init(void); void cf_error(const char *msg, ...) NORET; void config_add_obstacle(struct config *); void config_del_obstacle(struct config *); void order_shutdown(int gr); #define RECONFIG_NONE 0 #define RECONFIG_HARD 1 #define RECONFIG_SOFT 2 #define RECONFIG_UNDO 3 #define CONF_DONE 0 #define CONF_PROGRESS 1 #define CONF_QUEUED 2 #define CONF_UNQUEUED 3 #define CONF_CONFIRM 4 #define CONF_SHUTDOWN -1 #define CONF_NOTHING -2 /* Pools */ extern pool *config_pool; extern linpool *cfg_mem; #define cfg_alloc(size) lp_alloc(cfg_mem, size) #define cfg_allocu(size) lp_allocu(cfg_mem, size) #define cfg_allocz(size) lp_allocz(cfg_mem, size) char *cfg_strdup(const char *c); void cfg_copy_list(list *dest, list *src, unsigned node_size); /* Lexer */ extern int (*cf_read_hook)(byte *buf, uint max, int fd); struct symbol { node n; /* In list of symbols in config */ struct symbol *next; struct sym_scope *scope; int class; /* SYM_* */ uint flags; /* SYM_FLAG_* */ union { struct proto_config *proto; /* For SYM_PROTO and SYM_TEMPLATE */ const struct f_line *function; /* For SYM_FUNCTION */ const struct filter *filter; /* For SYM_FILTER */ struct rtable_config *table; /* For SYM_TABLE */ struct f_dynamic_attr *attribute; /* For SYM_ATTRIBUTE */ struct f_val *val; /* For SYM_CONSTANT */ uint offset; /* For SYM_VARIABLE */ }; char name[0]; }; struct sym_scope { struct sym_scope *next; /* Next on scope stack */ struct symbol *name; /* Name of this scope */ uint slots; /* Variable slots */ byte active; /* Currently entered */ byte block; /* No independent stack frame */ byte soft_scopes; /* Number of soft scopes above */ }; struct bytestring { size_t length; byte data[]; }; #define SYM_MAX_LEN 64 /* Remember to update cf_symbol_class_name() */ #define SYM_VOID 0 #define SYM_PROTO 1 #define SYM_TEMPLATE 2 #define SYM_FUNCTION 3 #define SYM_FILTER 4 #define SYM_TABLE 5 #define SYM_ATTRIBUTE 6 #define SYM_VARIABLE 0x100 /* 0x100-0x1ff are variable types */ #define SYM_VARIABLE_RANGE SYM_VARIABLE ... (SYM_VARIABLE | 0xff) #define SYM_CONSTANT 0x200 /* 0x200-0x2ff are variable types */ #define SYM_CONSTANT_RANGE SYM_CONSTANT ... (SYM_CONSTANT | 0xff) #define SYM_TYPE(s) ((s)->val->type) #define SYM_VAL(s) ((s)->val->val) /* Symbol flags */ #define SYM_FLAG_SAME 0x1 /* For SYM_FUNCTION and SYM_FILTER */ struct include_file_stack { void *buffer; /* Internal lexer state */ char *file_name; /* File name */ int fd; /* File descriptor */ int lino; /* Current line num */ int chno; /* Current char num (on current line) */ int toklen; /* Current token length */ int depth; /* Include depth, 0 = cannot include */ struct include_file_stack *prev; /* Previous record in stack */ struct include_file_stack *up; /* Parent (who included this file) */ }; extern struct include_file_stack *ifs; extern struct sym_scope *conf_this_scope; int cf_lex(void); void cf_lex_init(int is_cli, struct config *c); void cf_lex_unwind(void); struct symbol *cf_find_symbol(const struct config *cfg, const byte *c); struct symbol *cf_get_symbol(const byte *c); struct symbol *cf_default_name(char *template, int *counter); struct symbol *cf_localize_symbol(struct symbol *sym); static inline int cf_symbol_is_local(struct symbol *sym) { return (sym->scope == conf_this_scope) && !conf_this_scope->soft_scopes; } /** * cf_define_symbol - define meaning of a symbol * @sym: symbol to be defined * @type: symbol class to assign * @def: class dependent data * * Defines new meaning of a symbol. If the symbol is an undefined * one (%SYM_VOID), it's just re-defined to the new type. If it's defined * in different scope, a new symbol in current scope is created and the * meaning is assigned to it. If it's already defined in the current scope, * an error is reported via cf_error(). * * Result: Pointer to the newly defined symbol. If we are in the top-level * scope, it's the same @sym as passed to the function. */ #define cf_define_symbol(osym_, type_, var_, def_) ({ \ struct symbol *sym_ = cf_localize_symbol(osym_); \ sym_->class = type_; \ sym_->var_ = def_; \ sym_; }) void cf_push_scope(struct symbol *); void cf_pop_scope(void); void cf_push_soft_scope(void); void cf_pop_soft_scope(void); static inline void cf_push_block_scope(void) { cf_push_scope(NULL); conf_this_scope->block = 1; } static inline void cf_pop_block_scope(void) { ASSERT(conf_this_scope->block); cf_pop_scope(); } char *cf_symbol_class_name(struct symbol *sym); /* Parser */ extern char *cf_text; int cf_parse(void); /* Sysdep hooks */ void sysdep_preconfig(struct config *); int sysdep_commit(struct config *, struct config *); void sysdep_shutdown_done(void); #endif