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/*
* include/haproxy/log.h
* This file contains definitions of log-related functions.
*
* Copyright (C) 2000-2020 Willy Tarreau - w@1wt.eu
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation, version 2.1
* exclusively.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef _HAPROXY_LOG_H
#define _HAPROXY_LOG_H
#include <syslog.h>
#include <haproxy/api.h>
#include <haproxy/log-t.h>
#include <haproxy/pool-t.h>
#include <haproxy/proxy-t.h>
#include <haproxy/stream.h>
extern struct pool_head *pool_head_requri;
extern struct pool_head *pool_head_uniqueid;
extern const char *log_levels[];
extern char *log_format;
extern char httpclient_log_format[];
extern char default_tcp_log_format[];
extern char default_http_log_format[];
extern char clf_http_log_format[];
extern char default_https_log_format[];
extern char default_rfc5424_sd_log_format[];
extern const char sess_term_cond[];
extern const char sess_fin_state[];
extern unsigned int dropped_logs;
/* lof forward proxy list */
extern struct proxy *cfg_log_forward;
extern THREAD_LOCAL char *logline;
extern THREAD_LOCAL char *logline_rfc5424;
/* global syslog message counter */
extern int cum_log_messages;
/* syslog UDP message handler */
void syslog_fd_handler(int fd);
/* Initialize/Deinitialize log buffers used for syslog messages */
int init_log_buffers(void);
void deinit_log_buffers(void);
/* build a log line for the session and an optional stream */
int sess_build_logline(struct session *sess, struct stream *s, char *dst, size_t maxsize, struct list *list_format);
/*
* send a log for the stream when we have enough info about it.
* Will not log if the frontend has no log defined.
*/
void strm_log(struct stream *s);
void sess_log(struct session *sess);
/* send a applicative log with custom list of loggers */
void app_log(struct list *loggers, struct buffer *tag, int level, const char *format, ...)
__attribute__ ((format(printf, 4, 5)));
/*
* add to the logformat linked list
*/
int add_to_logformat_list(char *start, char *end, int type, struct list *list_format, char **err);
/*
* Parse the log_format string and fill a linked list.
* Variable name are preceded by % and composed by characters [a-zA-Z0-9]* : %varname
* You can set arguments using { } : %{many arguments}varname
*/
int parse_logformat_string(const char *str, struct proxy *curproxy, struct list *list_format, int options, int cap, char **err);
int postresolve_logger_list(struct list *loggers, const char *section, const char *section_name);
struct logger *dup_logger(struct logger *def);
void free_logger(struct logger *logger);
void deinit_log_target(struct log_target *target);
/* Parse "log" keyword and update the linked list. */
int parse_logger(char **args, struct list *loggers, int do_del, const char *file, int linenum, char **err);
/*
* This function adds a header to the message and sends the syslog message
* using a printf format string
*/
void send_log(struct proxy *p, int level, const char *format, ...)
__attribute__ ((format(printf, 3, 4)));
/*
* This function sends a syslog message to all loggers of a proxy,
* or to global loggers if the proxy is NULL.
* It also tries not to waste too much time computing the message header.
* It doesn't care about errors nor does it report them.
*/
void __send_log(struct list *loggers, struct buffer *tag, int level, char *message, size_t size, char *sd, size_t sd_size);
/*
* returns log format for <fmt> or LOG_FORMAT_UNSPEC if not found.
*/
enum log_fmt get_log_format(const char *fmt);
/*
* returns log level for <lev> or -1 if not found.
*/
int get_log_level(const char *lev);
/*
* returns log facility for <fac> or -1 if not found.
*/
int get_log_facility(const char *fac);
/*
* Write a string in the log string
* Take cares of quote options
*
* Return the address of the \0 character, or NULL on error
*/
char *lf_text_len(char *dst, const char *src, size_t len, size_t size, const struct logformat_node *node);
/*
* Write a IP address to the log string
* +X option write in hexadecimal notation, most significant byte on the left
*/
char *lf_ip(char *dst, const struct sockaddr *sockaddr, size_t size, const struct logformat_node *node);
/*
* Write a port to the log
* +X option write in hexadecimal notation, most significant byte on the left
*/
char *lf_port(char *dst, const struct sockaddr *sockaddr, size_t size, const struct logformat_node *node);
/*
* Function to handle log header building (exported for sinks)
*/
char *update_log_hdr_rfc5424(const time_t time, suseconds_t frac);
char *update_log_hdr(const time_t time);
char * get_format_pid_sep1(int format, size_t *len);
char * get_format_pid_sep2(int format, size_t *len);
/*
* Builds a log line for the stream (must be valid).
*/
static inline int build_logline(struct stream *s, char *dst, size_t maxsize, struct list *list_format)
{
return sess_build_logline(strm_sess(s), s, dst, maxsize, list_format);
}
struct ist *build_log_header(struct log_header hdr, size_t *nbelem);
/*
* lookup log forward proxy by name
* Returns NULL if no proxy found.
*/
static inline struct proxy *log_forward_by_name(const char *name)
{
struct proxy *px = cfg_log_forward;
while (px) {
if (strcmp(px->id, name) == 0)
return px;
px = px->next;
}
return NULL;
}
#endif /* _HAPROXY_LOG_H */
/*
* Local variables:
* c-indent-level: 8
* c-basic-offset: 8
* End:
*/
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