netwerk/sctp/src/user_environment.c@97036ab72558 (annotated)
netwerk/sctp/src/user_environment.c
Tue, 06 Jan 2015 21:39:09 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Tue, 06 Jan 2015 21:39:09 +0100
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
- permissions
- -rwxr-xr-x
Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
| michael@0 | 1 | /*- |
| michael@0 | 2 | * Copyright (c) 2009-2010 Brad Penoff |
| michael@0 | 3 | * Copyright (c) 2009-2010 Humaira Kamal |
| michael@0 | 4 | * Copyright (c) 2011-2012 Irene Ruengeler |
| michael@0 | 5 | * Copyright (c) 2011-2012 Michael Tuexen |
| michael@0 | 6 | * |
| michael@0 | 7 | * All rights reserved. |
| michael@0 | 8 | * |
| michael@0 | 9 | * Redistribution and use in source and binary forms, with or without |
| michael@0 | 10 | * modification, are permitted provided that the following conditions |
| michael@0 | 11 | * are met: |
| michael@0 | 12 | * 1. Redistributions of source code must retain the above copyright |
| michael@0 | 13 | * notice, this list of conditions and the following disclaimer. |
| michael@0 | 14 | * 2. Redistributions in binary form must reproduce the above copyright |
| michael@0 | 15 | * notice, this list of conditions and the following disclaimer in the |
| michael@0 | 16 | * documentation and/or other materials provided with the distribution. |
| michael@0 | 17 | * |
| michael@0 | 18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| michael@0 | 19 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| michael@0 | 20 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| michael@0 | 21 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| michael@0 | 22 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| michael@0 | 23 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| michael@0 | 24 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| michael@0 | 25 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| michael@0 | 26 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| michael@0 | 27 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| michael@0 | 28 | * SUCH DAMAGE. |
| michael@0 | 29 | */ |
| michael@0 | 30 | |
| michael@0 | 31 | /* __Userspace__ */ |
| michael@0 | 32 | |
| michael@0 | 33 | #include <stdlib.h> |
| michael@0 | 34 | #if !defined (__Userspace_os_Windows) |
| michael@0 | 35 | #include <stdint.h> |
| michael@0 | 36 | #include <netinet/sctp_os_userspace.h> |
| michael@0 | 37 | #endif |
| michael@0 | 38 | #include <user_environment.h> |
| michael@0 | 39 | #include <sys/types.h> |
| michael@0 | 40 | /* #include <sys/param.h> defines MIN */ |
| michael@0 | 41 | #if !defined(MIN) |
| michael@0 | 42 | #define MIN(arg1,arg2) ((arg1) < (arg2) ? (arg1) : (arg2)) |
| michael@0 | 43 | #endif |
| michael@0 | 44 | #include <string.h> |
| michael@0 | 45 | |
| michael@0 | 46 | #define uHZ 1000 |
| michael@0 | 47 | |
| michael@0 | 48 | /* See user_include/user_environment.h for comments about these variables */ |
| michael@0 | 49 | int maxsockets = 25600; |
| michael@0 | 50 | int hz = uHZ; |
| michael@0 | 51 | int ip_defttl = 64; |
| michael@0 | 52 | int ipport_firstauto = 49152, ipport_lastauto = 65535; |
| michael@0 | 53 | int nmbclusters = 65536; |
| michael@0 | 54 | |
| michael@0 | 55 | /* Source ip_output.c. extern'd in ip_var.h */ |
| michael@0 | 56 | u_short ip_id = 0; /*__Userspace__ TODO Should it be initialized to zero? */ |
| michael@0 | 57 | |
| michael@0 | 58 | /* used in user_include/user_atomic.h in order to make the operations |
| michael@0 | 59 | * defined there truly atomic |
| michael@0 | 60 | */ |
| michael@0 | 61 | userland_mutex_t atomic_mtx; |
| michael@0 | 62 | |
| michael@0 | 63 | /* Source: /usr/src/sys/dev/random/harvest.c */ |
| michael@0 | 64 | static int read_random_phony(void *, int); |
| michael@0 | 65 | |
| michael@0 | 66 | static int (*read_func)(void *, int) = read_random_phony; |
| michael@0 | 67 | |
| michael@0 | 68 | /* Userland-visible version of read_random */ |
| michael@0 | 69 | int |
| michael@0 | 70 | read_random(void *buf, int count) |
| michael@0 | 71 | { |
| michael@0 | 72 | return ((*read_func)(buf, count)); |
| michael@0 | 73 | } |
| michael@0 | 74 | |
| michael@0 | 75 | /* If the entropy device is not loaded, make a token effort to |
| michael@0 | 76 | * provide _some_ kind of randomness. This should only be used |
| michael@0 | 77 | * inside other RNG's, like arc4random(9). |
| michael@0 | 78 | */ |
| michael@0 | 79 | static int |
| michael@0 | 80 | read_random_phony(void *buf, int count) |
| michael@0 | 81 | { |
| michael@0 | 82 | uint32_t randval; |
| michael@0 | 83 | int size, i; |
| michael@0 | 84 | |
| michael@0 | 85 | /* srandom() is called in kern/init_main.c:proc0_post() */ |
| michael@0 | 86 | |
| michael@0 | 87 | /* Fill buf[] with random(9) output */ |
| michael@0 | 88 | for (i = 0; i < count; i+= (int)sizeof(uint32_t)) { |
| michael@0 | 89 | randval = random(); |
| michael@0 | 90 | size = MIN(count - i, (int)sizeof(uint32_t)); |
| michael@0 | 91 | memcpy(&((char *)buf)[i], &randval, (size_t)size); |
| michael@0 | 92 | } |
| michael@0 | 93 | |
| michael@0 | 94 | return (count); |
| michael@0 | 95 | } |
| michael@0 | 96 |
