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Diffstat (limited to '')
| -rw-r--r-- | lib/log.h | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/lib/log.h b/lib/log.h new file mode 100644 index 0000000..8a95b7a --- /dev/null +++ b/lib/log.h @@ -0,0 +1,179 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Zebra logging funcions. + * Copyright (C) 1997, 1998, 1999 Kunihiro Ishiguro + */ + +#ifndef _ZEBRA_LOG_H +#define _ZEBRA_LOG_H + +#include <syslog.h> +#include <stdint.h> +#include <stdbool.h> +#include <stdio.h> +#include <stdarg.h> + +#include "lib/hook.h" +#include "lib/zlog.h" +#include "lib/zlog_targets.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/* Here is some guidance on logging levels to use: + * + * LOG_DEBUG - For all messages that are enabled by optional debugging + * features, typically preceded by "if (IS...DEBUG...)" + * LOG_INFO - Information that may be of interest, but everything seems + * to be working properly. + * LOG_NOTICE - Only for message pertaining to daemon startup or shutdown. + * LOG_WARNING - Warning conditions: unexpected events, but the daemon believes + * it can continue to operate correctly. + * LOG_ERR - Error situations indicating malfunctions. Probably require + * attention. + * + * Note: LOG_CRIT, LOG_ALERT, and LOG_EMERG are currently not used anywhere, + * please use LOG_ERR instead. + */ + +extern void zlog_rotate(void); + +/* Message structure. */ +struct message { + int key; + const char *str; +}; + +extern void zlog_thread_info(int log_level); + +#define ZLOG_FILTERS_MAX 100 /* Max # of filters at once */ +#define ZLOG_FILTER_LENGTH_MAX 80 /* 80 character filter limit */ + +struct zlog_cfg_filterfile { + struct zlog_cfg_file parent; +}; + +extern void zlog_filterfile_init(struct zlog_cfg_filterfile *zcf); +extern void zlog_filterfile_fini(struct zlog_cfg_filterfile *zcf); + +/* Add/Del/Dump log filters */ +extern void zlog_filter_clear(void); +extern int zlog_filter_add(const char *filter); +extern int zlog_filter_del(const char *filter); +extern int zlog_filter_dump(char *buf, size_t max_size); + +const char *lookup_msg(const struct message *mz, int kz, const char *nf); + +/* Safe version of strerror -- never returns NULL. */ +extern const char *safe_strerror(int errnum); + +/* To be called when a fatal signal is caught. */ +extern void zlog_signal(int signo, const char *action, void *siginfo, + void *program_counter); + +/* Log a backtrace. */ +extern void zlog_backtrace(int priority); + +/* Log a backtrace, but in an async-signal-safe way. Should not be + called unless the program is about to exit or abort, since it messes + up the state of zlog file pointers. If program_counter is non-NULL, + that is logged in addition to the current backtrace. */ +extern void zlog_backtrace_sigsafe(int priority, void *program_counter); + +/* Puts a current timestamp in buf and returns the number of characters + written (not including the terminating NUL). The purpose of + this function is to avoid calls to localtime appearing all over the code. + It caches the most recent localtime result and can therefore + avoid multiple calls within the same second. If buflen is too small, + *buf will be set to '\0', and 0 will be returned. */ +#define FRR_TIMESTAMP_LEN 40 +extern size_t frr_timestamp(int timestamp_precision /* # subsecond digits */, + char *buf, size_t buflen); + +extern void zlog_hexdump(const void *mem, size_t len); +extern const char *zlog_sanitize(char *buf, size_t bufsz, const void *in, + size_t inlen); + +/* Note: whenever a new route-type or zserv-command is added the + * corresponding {command,route}_types[] table in lib/log.c MUST be + * updated! */ + +/* Map a route type to a string. For example, ZEBRA_ROUTE_RIPNG -> "ripng". */ +extern const char *zebra_route_string(unsigned int route_type); +/* Map a route type to a char. For example, ZEBRA_ROUTE_RIPNG -> 'R'. */ +extern char zebra_route_char(unsigned int route_type); +/* Map a zserv command type to the same string, + * e.g. ZEBRA_INTERFACE_ADD -> "ZEBRA_INTERFACE_ADD" */ +/* Map a protocol name to its number. e.g. ZEBRA_ROUTE_BGP->9*/ +extern int proto_name2num(const char *s); +/* Map redistribute X argument to protocol number. + * unlike proto_name2num, this accepts shorthands and takes + * an AFI value to restrict input */ +extern int proto_redistnum(int afi, const char *s); + +extern const char *zserv_command_string(unsigned int command); +extern const char *zserv_gr_client_cap_string(unsigned int zcc); + +#define OSPF_LOG(level, cond, fmt, ...) \ + do { \ + if (cond) \ + zlog_##level(fmt, ##__VA_ARGS__); \ + } while (0) + +#define OSPF_LOG_ERR(fmt, ...) OSPF_LOG(err, true, fmt, ##__VA_ARGS__) + +#define OSPF_LOG_WARN(fmt, ...) OSPF_LOG(warn, true, fmt, ##__VA_ARGS__) + +#define OSPF_LOG_INFO(fmt, ...) OSPF_LOG(info, true, fmt, ##__VA_ARGS__) + +#define OSPF_LOG_DEBUG(cond, fmt, ...) OSPF_LOG(debug, cond, fmt, ##__VA_ARGS__) + +#define OSPF_LOG_NOTICE(fmt, ...) OSPF_LOG(notice, true, fmt, ##__VA_ARGS__) + +/* structure useful for avoiding repeated rendering of the same timestamp */ +struct timestamp_control { + size_t len; /* length of rendered timestamp */ + int precision; /* configuration parameter */ + int already_rendered; /* should be initialized to 0 */ + char buf[FRR_TIMESTAMP_LEN]; /* will contain the rendered timestamp + */ +}; + +/* Defines for use in command construction: */ + +#define LOG_LEVEL_DESC \ + "System is unusable\n" \ + "Immediate action needed\n" \ + "Critical conditions\n" \ + "Error conditions\n" \ + "Warning conditions\n" \ + "Normal but significant conditions\n" \ + "Informational messages\n" \ + "Debugging messages\n" + +#define LOG_FACILITY_DESC \ + "Kernel\n" \ + "User process\n" \ + "Mail system\n" \ + "System daemons\n" \ + "Authorization system\n" \ + "Syslog itself\n" \ + "Line printer system\n" \ + "USENET news\n" \ + "Unix-to-Unix copy system\n" \ + "Cron/at facility\n" \ + "Local use\n" \ + "Local use\n" \ + "Local use\n" \ + "Local use\n" \ + "Local use\n" \ + "Local use\n" \ + "Local use\n" \ + "Local use\n" + +#ifdef __cplusplus +} +#endif + +#endif /* _ZEBRA_LOG_H */ |