Line data    Source code

       1             : /*-
       2             :  * Copyright (c) 2009-2010 Brad Penoff
       3             :  * Copyright (c) 2009-2010 Humaira Kamal
       4             :  * Copyright (c) 2011-2012 Irene Ruengeler
       5             :  * Copyright (c) 2011-2012 Michael Tuexen
       6             :  *
       7             :  * All rights reserved.
       8             :  *
       9             :  * Redistribution and use in source and binary forms, with or without
      10             :  * modification, are permitted provided that the following conditions
      11             :  * are met:
      12             :  * 1. Redistributions of source code must retain the above copyright
      13             :  *    notice, this list of conditions and the following disclaimer.
      14             :  * 2. Redistributions in binary form must reproduce the above copyright
      15             :  *    notice, this list of conditions and the following disclaimer in the
      16             :  *    documentation and/or other materials provided with the distribution.
      17             :  *
      18             :  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
      19             :  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
      20             :  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
      21             :  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
      22             :  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
      23             :  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
      24             :  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
      25             :  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
      26             :  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
      27             :  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
      28             :  * SUCH DAMAGE.
      29             :  */
      30             : 
      31             : /* __Userspace__ */
      32             : 
      33             : #include <stdlib.h>
      34             : #if !defined (__Userspace_os_Windows)
      35             : #include <stdint.h>
      36             : #include <netinet/sctp_os_userspace.h>
      37             : #endif
      38             : #include <user_environment.h>
      39             : #include <sys/types.h>
      40             : /* #include <sys/param.h> defines MIN */
      41             : #if !defined(MIN)
      42             : #define MIN(arg1,arg2) ((arg1) < (arg2) ? (arg1) : (arg2))
      43             : #endif
      44             : #include <string.h>
      45             : 
      46             : #define uHZ 1000
      47             : 
      48             : /* See user_include/user_environment.h for comments about these variables */
      49             : int maxsockets = 25600;
      50             : int hz = uHZ;
      51             : int ip_defttl = 64;
      52             : int ipport_firstauto = 49152, ipport_lastauto = 65535;
      53             : int nmbclusters = 65536;
      54             : 
      55             : /* Source ip_output.c. extern'd in ip_var.h */
      56             : u_short ip_id = 0; /*__Userspace__ TODO Should it be initialized to zero? */
      57             : 
      58             : /* used in user_include/user_atomic.h in order to make the operations
      59             :  * defined there truly atomic
      60             :  */
      61             : userland_mutex_t atomic_mtx;
      62             : 
      63             : /* Source: /usr/src/sys/dev/random/harvest.c */
      64             : static int read_random_phony(void *, int);
      65             : 
      66             : static int (*read_func)(void *, int) = read_random_phony;
      67             : 
      68             : /* Userland-visible version of read_random */
      69             : int
      70           0 : read_random(void *buf, int count)
      71             : {
      72           0 :         return ((*read_func)(buf, count));
      73             : }
      74             : 
      75             : /* If the entropy device is not loaded, make a token effort to
      76             :  * provide _some_ kind of randomness. This should only be used
      77             :  * inside other RNG's, like arc4random(9).
      78             :  */
      79             : static int
      80           0 : read_random_phony(void *buf, int count)
      81             : {
      82             :         uint32_t randval;
      83             :         int size, i;
      84             : 
      85             :         /* srandom() is called in kern/init_main.c:proc0_post() */
      86             : 
      87             :         /* Fill buf[] with random(9) output */
      88           0 :         for (i = 0; i < count; i+= (int)sizeof(uint32_t)) {
      89           0 :                 randval = random();
      90           0 :                 size = MIN(count - i, (int)sizeof(uint32_t));
      91           0 :                 memcpy(&((char *)buf)[i], &randval, (size_t)size);
      92             :         }
      93             : 
      94           0 :         return (count);
      95             : }
      96             :