1 | /** |
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2 | * @file |
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3 | * |
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4 | * @ingroup rtems_bsd_rtems |
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5 | * |
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6 | * @brief This object is an minimal rtems implementation of kern_jail.c. |
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7 | */ |
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8 | |
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9 | /* |
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10 | * Copyright (c) 2009, 2010 embedded brains GmbH. All rights reserved. |
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11 | * |
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12 | * embedded brains GmbH |
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13 | * Obere Lagerstr. 30 |
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14 | * 82178 Puchheim |
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15 | * Germany |
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16 | * <rtems@embedded-brains.de> |
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17 | * |
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18 | * Redistribution and use in source and binary forms, with or without |
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19 | * modification, are permitted provided that the following conditions |
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20 | * are met: |
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21 | * 1. Redistributions of source code must retain the above copyright |
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22 | * notice, this list of conditions and the following disclaimer. |
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23 | * 2. Redistributions in binary form must reproduce the above copyright |
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24 | * notice, this list of conditions and the following disclaimer in the |
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25 | * documentation and/or other materials provided with the distribution. |
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26 | * |
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27 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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28 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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29 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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30 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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31 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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32 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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33 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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34 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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35 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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36 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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37 | * SUCH DAMAGE. |
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38 | */ |
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39 | |
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40 | #include <freebsd/machine/rtems-bsd-config.h> |
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41 | |
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42 | /*#include <freebsd/sys/types.h> |
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43 | #include <freebsd/sys/systm.h> |
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44 | #include <freebsd/sys/malloc.h> |
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45 | #include <freebsd/sys/jail.h> |
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46 | #include <freebsd/sys/lock.h> |
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47 | #include <freebsd/sys/mutex.h>*/ |
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48 | |
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49 | #include <freebsd/sys/param.h> |
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50 | #include <freebsd/sys/types.h> |
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51 | #include <freebsd/sys/kernel.h> |
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52 | #include <freebsd/sys/systm.h> |
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53 | #include <freebsd/sys/errno.h> |
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54 | #include <freebsd/sys/sysproto.h> |
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55 | #include <freebsd/sys/malloc.h> |
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56 | #include <freebsd/sys/osd.h> |
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57 | #include <freebsd/sys/priv.h> |
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58 | #include <freebsd/sys/proc.h> |
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59 | #include <freebsd/sys/taskqueue.h> |
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60 | #include <freebsd/sys/fcntl.h> |
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61 | #include <freebsd/sys/jail.h> |
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62 | #include <freebsd/sys/lock.h> |
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63 | #include <freebsd/sys/mutex.h> |
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64 | #include <freebsd/sys/sx.h> |
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65 | #include <freebsd/sys/sysent.h> |
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66 | #include <freebsd/sys/namei.h> |
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67 | #include <freebsd/sys/mount.h> |
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68 | #include <freebsd/sys/queue.h> |
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69 | #include <freebsd/sys/socket.h> |
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70 | #include <freebsd/sys/syscallsubr.h> |
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71 | #include <freebsd/sys/sysctl.h> |
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72 | |
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73 | #define DEFAULT_HOSTUUID "00000000-0000-0000-0000-000000000000" |
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74 | |
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75 | /* Keep struct prison prison0 and some code in kern_jail_set() readable. */ |
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76 | #ifdef INET |
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77 | #ifdef INET6 |
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78 | #define _PR_IP_SADDRSEL PR_IP4_SADDRSEL|PR_IP6_SADDRSEL |
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79 | #else |
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80 | #define _PR_IP_SADDRSEL PR_IP4_SADDRSEL |
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81 | #endif |
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82 | #else /* !INET */ |
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83 | #ifdef INET6 |
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84 | #define _PR_IP_SADDRSEL PR_IP6_SADDRSEL |
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85 | #else |
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86 | #define _PR_IP_SADDRSEL 0 |
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87 | #endif |
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88 | #endif |
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89 | |
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90 | /* prison0 describes what is "real" about the system. */ |
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91 | struct prison prison0 = { |
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92 | .pr_id = 0, |
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93 | .pr_name = "0", |
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94 | .pr_ref = 1, |
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95 | .pr_uref = 1, |
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96 | .pr_path = "/", |
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97 | .pr_securelevel = -1, |
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98 | .pr_childmax = JAIL_MAX, |
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99 | .pr_hostuuid = DEFAULT_HOSTUUID, |
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100 | .pr_children = LIST_HEAD_INITIALIZER(prison0.pr_children), |
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101 | #ifdef VIMAGE |
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102 | .pr_flags = PR_HOST|PR_VNET|_PR_IP_SADDRSEL, |
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103 | #else |
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104 | .pr_flags = PR_HOST|_PR_IP_SADDRSEL, |
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105 | #endif |
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106 | .pr_allow = PR_ALLOW_ALL, |
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107 | }; |
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108 | MTX_SYSINIT(prison0, &prison0.pr_mtx, "jail mutex", MTX_DEF); |
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109 | |
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110 | /* |
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111 | * See if a prison has the specific flag set. |
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112 | */ |
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113 | int |
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114 | prison_flag(struct ucred *cred, unsigned flag) |
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115 | { |
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116 | /* This is an atomic read, so no locking is necessary. */ |
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117 | return (cred->cr_prison->pr_flags & flag); |
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118 | } |
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119 | |
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120 | void |
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121 | prison_free(struct prison *pr) |
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122 | { |
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123 | } |
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124 | |
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125 | void |
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126 | prison_hold(struct prison *pr) |
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127 | { |
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128 | } |
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129 | |
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130 | /* |
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131 | * Check if given address belongs to the jail referenced by cred (wrapper to |
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132 | * prison_check_ip[46]). |
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133 | * |
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134 | * Returns 0 if jail doesn't restrict the address family or if address belongs |
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135 | * to jail, EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if |
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136 | * the jail doesn't allow the address family. IPv4 Address passed in in NBO. |
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137 | */ |
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138 | int |
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139 | prison_if(struct ucred *cred, struct sockaddr *sa) |
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140 | { |
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141 | return 0; |
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142 | } |
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143 | |
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144 | /* |
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145 | * Return 1 if we should do proper source address selection or are not jailed. |
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146 | * We will return 0 if we should bypass source address selection in favour |
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147 | * of the primary jail IPv6 address. Only in this case *ia will be updated and |
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148 | * returned in NBO. |
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149 | * Return EAFNOSUPPORT, in case this jail does not allow IPv6. |
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150 | */ |
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151 | int |
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152 | prison_saddrsel_ip6(struct ucred *cred, struct in6_addr *ia6) |
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153 | { |
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154 | return EAFNOSUPPORT; |
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155 | } |
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156 | |
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157 | /* |
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158 | * Return true if pr1 and pr2 have the same IPv4 address restrictions. |
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159 | */ |
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160 | int |
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161 | prison_equal_ip4(struct prison *pr1, struct prison *pr2) |
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162 | { |
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163 | return 1; |
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164 | } |
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165 | |
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166 | /* |
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167 | * Check if given address belongs to the jail referenced by cred/prison. |
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168 | * |
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169 | * Returns 0 if jail doesn't restrict IPv4 or if address belongs to jail, |
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170 | * EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail |
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171 | * doesn't allow IPv4. Address passed in in NBO. |
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172 | */ |
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173 | int |
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174 | prison_check_ip4(struct ucred *cred, struct in_addr *ia) |
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175 | { |
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176 | return 0; |
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177 | } |
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178 | |
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179 | /* |
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180 | * Assuming 0 means no restrictions. |
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181 | * |
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182 | * NOTE: RTEMS does not restrict via a jail so return 0. |
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183 | */ |
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184 | int |
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185 | prison_check_ip6(struct ucred *cred, struct in6_addr *ia6) |
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186 | { |
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187 | return 0; |
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188 | } |
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189 | |
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190 | /* |
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191 | * Make sure our (source) address is set to something meaningful to this |
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192 | * jail. |
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193 | * |
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194 | * Returns 0 if jail doesn't restrict IPv4 or if address belongs to jail, |
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195 | * EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail |
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196 | * doesn't allow IPv4. Address passed in in NBO and returned in NBO. |
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197 | */ |
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198 | int |
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199 | prison_local_ip4(struct ucred *cred, struct in_addr *ia) |
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200 | { |
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201 | return EAFNOSUPPORT; |
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202 | } |
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203 | |
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204 | /* |
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205 | * Rewrite destination address in case we will connect to loopback address. |
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206 | * |
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207 | * Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv4. |
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208 | * Address passed in in NBO and returned in NBO. |
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209 | */ |
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210 | int |
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211 | prison_remote_ip4(struct ucred *cred, struct in_addr *ia) |
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212 | { |
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213 | return EAFNOSUPPORT; |
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214 | } |
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215 | |
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216 | /* |
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217 | * Return true if pr1 and pr2 have the same IPv6 address restrictions. |
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218 | */ |
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219 | int |
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220 | prison_equal_ip6(struct prison *pr1, struct prison *pr2) |
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221 | { |
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222 | return 1; |
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223 | } |
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224 | |
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225 | /* |
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226 | * Make sure our (source) address is set to something meaningful to this jail. |
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227 | * |
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228 | * v6only should be set based on (inp->inp_flags & IN6P_IPV6_V6ONLY != 0) |
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229 | * when needed while binding. |
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230 | * |
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231 | * Returns 0 if jail doesn't restrict IPv6 or if address belongs to jail, |
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232 | * EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail |
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233 | * doesn't allow IPv6. |
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234 | * |
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235 | * NOTE: RTEMS does not restrict via a jail so return 0. |
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236 | */ |
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237 | int |
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238 | prison_local_ip6(struct ucred *cred, struct in6_addr *ia6, int v6only) |
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239 | { |
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240 | return 0; |
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241 | } |
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242 | |
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243 | /* |
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244 | * Rewrite destination address in case we will connect to loopback address. |
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245 | * |
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246 | * Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv6. |
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247 | * |
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248 | * NOTE: RTEMS does not restrict via a jail so return 0. |
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249 | */ |
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250 | int |
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251 | prison_remote_ip6(struct ucred *cred, struct in6_addr *ia6) |
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252 | { |
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253 | return 0; |
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254 | } |
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255 | |
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256 | /* |
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257 | * Return 1 if we should do proper source address selection or are not jailed. |
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258 | * We will return 0 if we should bypass source address selection in favour |
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259 | * of the primary jail IPv4 address. Only in this case *ia will be updated and |
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260 | * returned in NBO. |
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261 | * Return EAFNOSUPPORT, in case this jail does not allow IPv4. |
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262 | */ |
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263 | int |
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264 | prison_saddrsel_ip4(struct ucred *cred, struct in_addr *ia) |
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265 | { |
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266 | } |
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267 | |
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268 | /* |
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269 | * Pass back primary IPv4 address of this jail. |
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270 | * |
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271 | * If not restricted return success but do not alter the address. Caller has |
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272 | * to make sure to initialize it correctly (e.g. INADDR_ANY). |
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273 | * |
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274 | * Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv4. |
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275 | * Address returned in NBO. |
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276 | */ |
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277 | int |
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278 | prison_get_ip4(struct ucred *cred, struct in_addr *ia) |
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279 | { |
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280 | return 0; |
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281 | } |
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282 | |
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283 | /* |
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284 | * Return 1 if the passed credential is in a jail and that jail does not |
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285 | * have its own virtual network stack, otherwise 0. |
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286 | */ |
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287 | int |
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288 | jailed_without_vnet(struct ucred *cred) |
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289 | { |
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290 | return 0; |
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291 | } |
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292 | |
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293 | /* |
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294 | * Pass back primary IPv6 address for this jail. |
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295 | * |
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296 | * If not restricted return success but do not alter the address. Caller has |
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297 | * to make sure to initialize it correctly (e.g. IN6ADDR_ANY_INIT). |
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298 | * |
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299 | * Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv6. |
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300 | */ |
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301 | int |
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302 | prison_get_ip6(struct ucred *cred, struct in6_addr *ia6) |
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303 | { |
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304 | return 0; |
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305 | } |
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306 | /* |
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307 | * Return 0 if jails permit p1 to frob p2, otherwise ESRCH. |
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308 | */ |
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309 | int |
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310 | prison_check(struct ucred *cred1, struct ucred *cred2) |
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311 | { |
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312 | return 0; |
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313 | } |
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314 | |
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315 | /* |
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316 | * Check if a jail supports the given address family. |
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317 | * |
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318 | * Returns 0 if not jailed or the address family is supported, EAFNOSUPPORT |
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319 | * if not. |
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320 | */ |
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321 | int |
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322 | prison_check_af(struct ucred *cred, int af) |
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323 | { |
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324 | return 0; |
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325 | } |
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326 | |
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327 | /* |
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328 | * Return 1 if the passed credential is in a jail, otherwise 0. |
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329 | */ |
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330 | int |
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331 | jailed(struct ucred *cred) |
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332 | { |
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333 | return 0; |
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334 | } |
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