mirror of
https://github.com/darkk/redsocks.git
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8456d20883
LOG_DEBUG - connection progress LOG_INFO - all connections LOG_NOTICE - network problems & startup banner LOG_WARNING - unexpected behaviour, lack of client-related resources LOG_ERR - startup errors & lack of memory
127 lines
3.1 KiB
C
127 lines
3.1 KiB
C
/* $Id$ */
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <event.h>
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#include "utils.h"
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#include "log.h"
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static const char *lowmem = "<Can't print error, not enough memory>";
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typedef void (*log_func)(const char *file, int line, const char *func, int priority, const char *message, const char *appendix);
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static void stderr_msg(const char *file, int line, const char *func, int priority, const char *message, const char *appendix)
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{
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struct timeval tv = { };
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gettimeofday(&tv, 0);
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if (appendix)
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fprintf(stderr, "%lu.%6.6lu %s:%u %s(...) %s: %s\n", tv.tv_sec, tv.tv_usec, file, line, func, message, appendix);
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else
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fprintf(stderr, "%lu.%6.6lu %s:%u %s(...) %s\n", tv.tv_sec, tv.tv_usec, file, line, func, message);
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}
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static void syslog_msg(const char *file, int line, const char *func, int priority, const char *message, const char *appendix)
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{
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if (appendix)
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syslog(priority, "%s: %s\n", message, appendix);
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else
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syslog(priority, "%s\n", message);
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}
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static log_func log_msg = stderr_msg;
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static log_func log_msg_next = NULL;
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int log_preopen(const char *dst, bool log_debug, bool log_info)
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{
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const char *syslog_prefix = "syslog:";
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if (strcmp(dst, "stderr") == 0) {
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log_msg_next = stderr_msg;
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}
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else if (strncmp(dst, syslog_prefix, strlen(syslog_prefix)) == 0) {
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const char *facility_name = dst + strlen(syslog_prefix);
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int facility = -1;
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int logmask;
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struct {
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char *name; int value;
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} *ptpl, tpl[] = {
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{ "daemon", LOG_DAEMON },
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{ "local0", LOG_LOCAL0 },
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{ "local1", LOG_LOCAL1 },
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{ "local2", LOG_LOCAL2 },
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{ "local3", LOG_LOCAL3 },
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{ "local4", LOG_LOCAL4 },
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{ "local5", LOG_LOCAL5 },
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{ "local6", LOG_LOCAL6 },
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{ "local7", LOG_LOCAL7 },
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};
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FOREACH(ptpl, tpl)
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if (strcmp(facility_name, ptpl->name) == 0) {
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facility = ptpl->value;
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break;
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}
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if (facility == -1) {
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log_error(LOG_ERR, "log_preopen(%s, ...): unknown syslog facility");
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return -1;
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}
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openlog("redsocks", LOG_NDELAY | LOG_PID, facility);
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logmask = setlogmask(0);
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if (!log_debug)
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logmask &= ~(LOG_MASK(LOG_DEBUG));
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if (!log_info)
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logmask &= ~(LOG_MASK(LOG_INFO));
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setlogmask(logmask);
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log_msg_next = syslog_msg;
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}
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else {
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log_error(LOG_ERR, "log_preopen(%s, ...): unknown destination", dst);
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return -1;
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}
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return 0;
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}
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void log_open()
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{
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log_msg = log_msg_next;
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log_msg_next = NULL;
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}
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void _log_vwrite(const char *file, int line, const char *func, int do_errno, int priority, const char *fmt, va_list ap)
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{
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int saved_errno = errno;
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struct evbuffer *buff = evbuffer_new();
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const char *message;
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if (buff) {
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evbuffer_add_vprintf(buff, fmt, ap);
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message = buff->buffer;
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}
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else
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message = lowmem;
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log_msg(file, line, func, priority, message, do_errno ? strerror(saved_errno) : NULL);
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if (buff)
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evbuffer_free(buff);
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}
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void _log_write(const char *file, int line, const char *func, int do_errno, int priority, const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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_log_vwrite(file, line, func, do_errno, priority, fmt, ap);
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va_end(ap);
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}
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/* vim:set tabstop=4 softtabstop=4 shiftwidth=4: */
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/* vim:set foldmethod=marker foldlevel=32 foldmarker={,}: */
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