path: root/support/dktools/dk4sock13.c

/*
	WARNING: This file was generated by dkct.
	Changes you make here will be lost if dkct is run again!
	You should modify the original source and run dkct on it.
	Original source: dk4sock13.ctr
*/

/*
Copyright (C) 2015-2017, Dirk Krause

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

* Redistributions of source code must retain the above copyright notice,
  this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above opyright notice,
  this list of conditions and the following disclaimer in the documentation
  and/or other materials provided with the distribution.
* Neither the name of the author nor the names of contributors may be used
  to endorse or promote products derived from this software without specific
  prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED.
IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

/**	@file dk4sock13.c The dk4sock13 module.
*/


#line 9 "dk4sock13.ctr"

#include "dk4sock.h"

#include <stdio.h>

#if DK4_HAVE_ERRNO_H
#ifndef ERRNO_H_INCLUDED
#include <errno.h>
#define	ERRNO_H_INCLUDED 1
#endif
#endif

#if DK4_HAVE_UNISTD_H
#ifndef	UNISTD_H_INCLUDED
#include <unistd.h>
#define	UNISTD_H_INCLUDED 1
#endif
#endif

#if DK4_HAVE_IO_H
#ifndef	IO_H_INCLUDED
#include <io.h>
#define	IO_H_INCLUDED 1
#endif
#endif

#if DK4_HAVE_STRINGS_H
#ifndef	STRINGS_H_INCLUDED
#include <strings.h>
#define	STRINGS_H_INCLUDED 1
#endif
#endif

#include "dk4mem.h"
#include "dk4stat.h"
#include "dk4stat8.h"
#include "dk4delfile08.h"




#line 49 "dk4sock13.ctr"



int
dk4socket_listen(
  dk4_socket_t		 sock,
  int			 bl,
  dk4_er_t		*erp
)
{
  int		 back = DK4_SOCKET_RESULT_FAILED;
  if ((INVALID_SOCKET != sock) && (0 < bl)) {
    dk4socket_error_reset();
    if (0 == listen(sock, bl)) {
      back = DK4_SOCKET_RESULT_SUCCESS;
    } else {
      dk4socket_error_report(erp, DK4_E_SOCKET_LISTEN);
    }
  } else {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  }
  return back;
}



dk4_socket_t
dk4socket_accept(
  dk4_socket_t		 sock,
  struct sockaddr	*pAddr,
  size_t		*pSzAddr,
  dk4_er_t		*erp
)
{
  dk4_socket_t	 back	= INVALID_SOCKET;
#if DK4_HAVE_SOCKLEN_T
  socklen_t	 sz;
#else
  int		 sz;
#endif
  

#line 90 "dk4sock13.ctr"
  if (INVALID_SOCKET != sock) {
    if (NULL != pAddr) {			

#line 92 "dk4sock13.ctr"
      if (NULL != pSzAddr) {			

#line 93 "dk4sock13.ctr"
        if (0 < *pSzAddr) {			

#line 94 "dk4sock13.ctr"
#if DK4_HAVE_SOCKLEN_T
          sz = (socklen_t)(*pSzAddr);
#else
          sz = (int)(*pSzAddr);
#endif
          dk4socket_error_reset();
          back = accept(sock, pAddr, &sz);
          if (INVALID_SOCKET != back) {
            *pSzAddr = (size_t)sz;
          } else {
            dk4socket_error_report(erp, DK4_E_SOCKET_ACCEPT);
            *pSzAddr = 0;
          }
	} else {				

#line 108 "dk4sock13.ctr"
	  dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
	}
      } else {					

#line 111 "dk4sock13.ctr"
        dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
      }
    } else {					

#line 114 "dk4sock13.ctr"
      /* ACCEPT */
      dk4socket_error_reset();
      back = accept(sock, NULL, NULL);
      if (INVALID_SOCKET == back) {
        dk4socket_error_report(erp, DK4_E_SOCKET_ACCEPT);
      }
    }
  } else {					

#line 122 "dk4sock13.ctr"
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  } 

#line 124 "dk4sock13.ctr"
  return back;
}

#if DK4_HAVE_STRUCT_SOCKADDR_UN


/**	Change mode and optionally owner and group for a socket.
	@param	sock		Socket file descriptor.
	@param	filename	Socket file name.
	@param	owner		New owner.
	@param	group		New group.
	@param	mode		New file mode.
	@param	cog		Flag: Also change owner and group.
	@param	erp		Error report, may be NULL
*/
static
int
dk4socket_i_change_owner_group_mode(
  dk4_socket_t		 sock,
  const char		*filename,
  uid_t			 owner,
  gid_t			 group,
  mode_t		 mode,
  int			 cog,
  dk4_er_t		*erp
)
{
  int		 errval;
  int		 back	= 1;
  

#line 154 "dk4sock13.ctr"
  if (0 != cog) {
    errno = 0;
    if (0 != chown(filename, owner, group)) {
      errval = errno;
      if (0 != fchown(sock, owner, group)) {
        back = 0;
	dk4error_set_idetails(erp, DK4_E_CHOWN_FAILED, errval);
      }
    }
  }
  errno = 0;
  if (0 != chmod(filename, mode)) {
    errval = errno;
    if (0 != fchmod(sock, mode)) {
      back = 0;
      dk4error_set_idetails(erp, DK4_E_CHMOD_FAILED, errval);
    }
  }
  

#line 173 "dk4sock13.ctr"
  return back;
}



static
dk4_socket_t
dk4socket_i_c8_unix_listener_ogm(
  const char		*filename,
  int			 backlog,
  uid_t			 owner,
  gid_t			 group,
  mode_t		 mode,
  int			 change,
  dk4_er_t		*erp
)
{
  struct sockaddr_un	soun;
  dk4_stat_t		stb;
  size_t		slen;
  dk4_socket_t		back	= INVALID_SOCKET;
  int			md	= 0;
  int			res;
  int			ogm1;
  int			ogm2;

  if ((NULL != filename) && (0 < backlog)) {
    if (108 > strlen(filename)) {
      /*	Attempt to remove existing socket.
      */
      res = 1;
      if (0 != dk4stat_c8(&stb, filename, NULL)) {
        res = 0;
        if (0 != dk4stat_is_unix_domain_socket(&stb, NULL)) {
	  if (0 != dk4delete_file_c8(filename, NULL)) {
	    res = 1;
	  } else {
	    /* ERROR: Failed to remove old socket */
	    dk4error_set_simple_error_code(erp, DK4_E_UNLINK_FAILED);
	  }
	} else {
	  /* ERROR: Not a socket */
	  dk4error_set_simple_error_code(erp, DK4_E_NON_SOCKET);
	}
      }
      /*	Open and bind new socket.
      */
      if (0 != res) {
        DK4_MEMRES(&soun, sizeof(soun));
        soun.sun_family = AF_UNIX;
        strcpy(soun.sun_path, filename);
        slen = dk4socket_unix_length(&soun);
        back = dk4socket_open(AF_UNIX, SOCK_STREAM, 0, erp);
        if (INVALID_SOCKET != back) {
          (void)dk4socket_option_set_reuse(back, 1, NULL);
	  res = dk4socket_bind(
	    back, (const struct sockaddr *)(&soun), slen, erp
	  );
	  if (DK4_SOCKET_RESULT_SUCCESS == res) {
	    ogm1 = dk4socket_i_change_owner_group_mode(
	      back, filename, owner, group, mode, change, erp
	    );
	    res = dk4socket_listen(back, backlog, erp);
	    if (DK4_SOCKET_RESULT_SUCCESS == res) {
	      ogm2 = dk4socket_i_change_owner_group_mode(
		back, filename, owner, group, mode, change, erp
	      );
	      if ((0 == ogm1) && (0 == ogm2)) {
	        (void)dk4socket_close(back, NULL);
		back = INVALID_SOCKET;
		md = 1;
	      }
	    } else {
	      (void)dk4socket_close(back, NULL);
	      back = INVALID_SOCKET;
	      md = 1;
	    }
	  } else {
	    (void)dk4socket_close(back, NULL);
	    back = INVALID_SOCKET;
	  }
	  if ((INVALID_SOCKET == back) && (0 != md)) {
	    (void)dk4delete_file_c8(filename, NULL);
	  }
        }
      } else {
      }
    } else {
      dk4error_set_simple_error_code(erp, DK4_E_SYNTAX);
    }
  } else {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  }
  return back;
}



dk4_socket_t
dk4socket_c8_unix_listener(
  const char		*filename,
  int			 backlog,
  dk4_er_t		*erp
)
{
  return (
    dk4socket_i_c8_unix_listener_ogm(filename, backlog, 0, 0, 0660, 0, erp)
  );
}



dk4_socket_t
dk4socket_c8_unix_listener_owner_group_mode(
  const char		*filename,
  int			 backlog,
  uid_t			 owner,
  gid_t			 group,
  mode_t		 mode,
  dk4_er_t		*erp
)
{
  return (
    dk4socket_i_c8_unix_listener_ogm(
      filename, backlog, owner, group, mode, 1, erp
    )
  );
}




#endif