text: /*
   * Dropbear - a SSH2 server
   * 
   * Copyright (c) 2002,2003 Matt Johnston
   * All rights reserved.
   * 
   * Permission is hereby granted, free of charge, to any person obtaining a copy
   * of this software and associated documentation files (the "Software"), to deal
   * in the Software without restriction, including without limitation the rights
   * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   * copies of the Software, and to permit persons to whom the Software is
   * furnished to do so, subject to the following conditions:
   * 
   * The above copyright notice and this permission notice shall be included in
   * all copies or substantial portions of the Software.
   * 
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
   * SOFTWARE. */
  
  #ifndef _DBUTIL_H_
  
  #define _DBUTIL_H_
  
  #include "includes.h"
  #include "buffer.h"
  
  #ifndef DISABLE_SYSLOG
  void startsyslog();
  #endif
  
  #ifdef __GNUC__
  #define ATTRIB_PRINTF(fmt,args) __attribute__((format(printf, fmt, args))) 
  #else
  #define ATTRIB_PRINTF(fmt,args)
  #endif
  
  #ifdef __GNUC__
  #define ATTRIB_NORETURN __attribute__((noreturn))
  #else
  #define ATTRIB_NORETURN
  #endif
  
  extern void (*_dropbear_exit)(int exitcode, const char* format, va_list param) ATTRIB_NORETURN;
  extern void (*_dropbear_log)(int priority, const char* format, va_list param);
  
  void dropbear_exit(const char* format, ...) ATTRIB_PRINTF(1,2) ATTRIB_NORETURN;
  
  void dropbear_close(const char* format, ...) ATTRIB_PRINTF(1,2) ;
  void dropbear_log(int priority, const char* format, ...) ATTRIB_PRINTF(2,3) ;
  
  void fail_assert(const char* expr, const char* file, int line) ATTRIB_NORETURN;
  
  #ifdef DEBUG_TRACE
  void dropbear_trace(const char* format, ...) ATTRIB_PRINTF(1,2);
  void printhex(const char * label, const unsigned char * buf, int len);
  extern int debug_trace;
  #endif
  
  char * stripcontrol(const char * text);
  void get_socket_address(int fd, char **local_host, char **local_port,
  		char **remote_host, char **remote_port, int host_lookup);
  void getaddrstring(struct sockaddr_storage* addr, 
  		char **ret_host, char **ret_port, int host_lookup);
  int dropbear_listen(const char* address, const char* port,
  		int *socks, unsigned int sockcount, char **errstring, int *maxfd);
  int spawn_command(void(*exec_fn)(void *user_data), void *exec_data,
  		int *writefd, int *readfd, int *errfd, pid_t *pid);
  void run_shell_command(const char* cmd, unsigned int maxfd, char* usershell);
  #ifdef ENABLE_CONNECT_UNIX
  int connect_unix(const char* addr);
  #endif
  int connect_remote(const char* remotehost, const char* remoteport,
  		int nonblocking, char ** errstring);
  int buf_readfile(buffer* buf, const char* filename);
  int buf_getline(buffer * line, FILE * authfile);
  
  void m_close(int fd);
  void * m_malloc(size_t size);
  void * m_strdup(const char * str);
  void * m_realloc(void* ptr, size_t size);
  #define m_free(X) free(X); (X) = NULL;
  void m_burn(void* data, unsigned int len);
  void setnonblocking(int fd);
  void disallow_core();
  int m_str_to_uint(const char* str, unsigned int *val);
  
  /* Used to force mp_ints to be initialised */
  #define DEF_MP_INT(X) mp_int X = {0, 0, 0, NULL}
  
  /* Dropbear assertion */
  #define dropbear_assert(X) do { if (!(X)) { fail_assert(#X, __FILE__, __LINE__); } } while (0)
  
  #endif /* _DBUTIL_H_ */
  