1 | #include <machine/rtems-bsd-user-space.h> |
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2 | |
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3 | /* $KAME: ipsec_dump_policy.c,v 1.13 2002/06/27 14:35:11 itojun Exp $ */ |
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4 | |
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5 | /* |
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6 | * Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project. |
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7 | * All rights reserved. |
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8 | * |
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9 | * Redistribution and use in source and binary forms, with or without |
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10 | * modification, are permitted provided that the following conditions |
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11 | * are met: |
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12 | * 1. Redistributions of source code must retain the above copyright |
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13 | * notice, this list of conditions and the following disclaimer. |
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14 | * 2. Redistributions in binary form must reproduce the above copyright |
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15 | * notice, this list of conditions and the following disclaimer in the |
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16 | * documentation and/or other materials provided with the distribution. |
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17 | * 3. Neither the name of the project nor the names of its contributors |
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18 | * may be used to endorse or promote products derived from this software |
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19 | * without specific prior written permission. |
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20 | * |
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21 | * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND |
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22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE |
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25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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31 | * SUCH DAMAGE. |
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32 | */ |
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33 | |
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34 | #include <sys/cdefs.h> |
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35 | __FBSDID("$FreeBSD$"); |
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36 | |
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37 | #include <sys/types.h> |
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38 | #include <rtems/bsd/sys/param.h> |
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39 | #include <sys/socket.h> |
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40 | |
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41 | #include <netipsec/key_var.h> |
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42 | #include <netinet/in.h> |
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43 | #include <netipsec/ipsec.h> |
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44 | |
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45 | #include <arpa/inet.h> |
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46 | |
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47 | #include <stdio.h> |
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48 | #include <stdlib.h> |
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49 | #include <string.h> |
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50 | #include <netdb.h> |
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51 | |
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52 | #include "ipsec_strerror.h" |
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53 | |
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54 | static const char *ipsp_dir_strs[] = { |
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55 | "any", "in", "out", |
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56 | }; |
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57 | |
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58 | static const char *ipsp_policy_strs[] = { |
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59 | "discard", "none", "ipsec", "entrust", "bypass", |
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60 | }; |
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61 | |
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62 | static char *ipsec_dump_ipsecrequest(char *, size_t, |
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63 | struct sadb_x_ipsecrequest *, size_t); |
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64 | static int set_addresses(char *, size_t, struct sockaddr *, struct sockaddr *); |
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65 | static char *set_address(char *, size_t, struct sockaddr *); |
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66 | |
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67 | /* |
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68 | * policy is sadb_x_policy buffer. |
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69 | * Must call free() later. |
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70 | * When delimiter == NULL, alternatively ' '(space) is applied. |
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71 | */ |
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72 | char * |
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73 | ipsec_dump_policy(policy, delimiter) |
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74 | caddr_t policy; |
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75 | char *delimiter; |
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76 | { |
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77 | struct sadb_x_policy *xpl = (struct sadb_x_policy *)policy; |
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78 | struct sadb_x_ipsecrequest *xisr; |
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79 | size_t off, buflen; |
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80 | char *buf; |
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81 | char isrbuf[1024]; |
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82 | char *newbuf; |
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83 | |
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84 | /* sanity check */ |
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85 | if (policy == NULL) |
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86 | return NULL; |
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87 | if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) { |
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88 | __ipsec_errcode = EIPSEC_INVAL_EXTTYPE; |
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89 | return NULL; |
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90 | } |
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91 | |
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92 | /* set delimiter */ |
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93 | if (delimiter == NULL) |
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94 | delimiter = " "; |
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95 | |
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96 | switch (xpl->sadb_x_policy_dir) { |
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97 | case IPSEC_DIR_ANY: |
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98 | case IPSEC_DIR_INBOUND: |
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99 | case IPSEC_DIR_OUTBOUND: |
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100 | break; |
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101 | default: |
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102 | __ipsec_errcode = EIPSEC_INVAL_DIR; |
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103 | return NULL; |
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104 | } |
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105 | |
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106 | switch (xpl->sadb_x_policy_type) { |
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107 | case IPSEC_POLICY_DISCARD: |
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108 | case IPSEC_POLICY_NONE: |
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109 | case IPSEC_POLICY_IPSEC: |
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110 | case IPSEC_POLICY_BYPASS: |
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111 | case IPSEC_POLICY_ENTRUST: |
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112 | break; |
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113 | default: |
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114 | __ipsec_errcode = EIPSEC_INVAL_POLICY; |
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115 | return NULL; |
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116 | } |
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117 | |
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118 | buflen = strlen(ipsp_dir_strs[xpl->sadb_x_policy_dir]) |
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119 | + 1 /* space */ |
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120 | + strlen(ipsp_policy_strs[xpl->sadb_x_policy_type]) |
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121 | + 1; /* NUL */ |
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122 | |
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123 | if ((buf = malloc(buflen)) == NULL) { |
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124 | __ipsec_errcode = EIPSEC_NO_BUFS; |
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125 | return NULL; |
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126 | } |
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127 | snprintf(buf, buflen, "%s %s", ipsp_dir_strs[xpl->sadb_x_policy_dir], |
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128 | ipsp_policy_strs[xpl->sadb_x_policy_type]); |
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129 | |
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130 | if (xpl->sadb_x_policy_type != IPSEC_POLICY_IPSEC) { |
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131 | __ipsec_errcode = EIPSEC_NO_ERROR; |
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132 | return buf; |
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133 | } |
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134 | |
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135 | /* count length of buffer for use */ |
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136 | off = sizeof(*xpl); |
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137 | while (off < PFKEY_EXTLEN(xpl)) { |
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138 | xisr = (struct sadb_x_ipsecrequest *)((caddr_t)xpl + off); |
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139 | off += xisr->sadb_x_ipsecrequest_len; |
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140 | } |
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141 | |
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142 | /* validity check */ |
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143 | if (off != PFKEY_EXTLEN(xpl)) { |
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144 | __ipsec_errcode = EIPSEC_INVAL_SADBMSG; |
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145 | free(buf); |
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146 | return NULL; |
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147 | } |
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148 | |
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149 | off = sizeof(*xpl); |
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150 | while (off < PFKEY_EXTLEN(xpl)) { |
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151 | xisr = (struct sadb_x_ipsecrequest *)((caddr_t)xpl + off); |
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152 | |
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153 | if (ipsec_dump_ipsecrequest(isrbuf, sizeof(isrbuf), xisr, |
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154 | PFKEY_EXTLEN(xpl) - off) == NULL) { |
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155 | free(buf); |
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156 | return NULL; |
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157 | } |
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158 | |
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159 | buflen = strlen(buf) + strlen(delimiter) + strlen(isrbuf) + 1; |
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160 | newbuf = (char *)realloc(buf, buflen); |
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161 | if (newbuf == NULL) { |
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162 | __ipsec_errcode = EIPSEC_NO_BUFS; |
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163 | free(buf); |
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164 | return NULL; |
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165 | } |
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166 | buf = newbuf; |
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167 | snprintf(buf + strlen(buf), buflen - strlen(buf), |
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168 | "%s%s", delimiter, isrbuf); |
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169 | |
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170 | off += xisr->sadb_x_ipsecrequest_len; |
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171 | } |
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172 | |
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173 | __ipsec_errcode = EIPSEC_NO_ERROR; |
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174 | return buf; |
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175 | } |
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176 | |
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177 | static char * |
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178 | ipsec_dump_ipsecrequest(buf, len, xisr, bound) |
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179 | char *buf; |
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180 | size_t len; |
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181 | struct sadb_x_ipsecrequest *xisr; |
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182 | size_t bound; /* boundary */ |
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183 | { |
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184 | const char *proto, *mode, *level; |
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185 | char abuf[NI_MAXHOST * 2 + 2]; |
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186 | |
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187 | if (xisr->sadb_x_ipsecrequest_len > bound) { |
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188 | __ipsec_errcode = EIPSEC_INVAL_PROTO; |
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189 | return NULL; |
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190 | } |
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191 | |
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192 | switch (xisr->sadb_x_ipsecrequest_proto) { |
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193 | case IPPROTO_ESP: |
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194 | proto = "esp"; |
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195 | break; |
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196 | case IPPROTO_AH: |
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197 | proto = "ah"; |
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198 | break; |
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199 | case IPPROTO_IPCOMP: |
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200 | proto = "ipcomp"; |
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201 | break; |
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202 | case IPPROTO_TCP: |
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203 | proto = "tcp"; |
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204 | break; |
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205 | default: |
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206 | __ipsec_errcode = EIPSEC_INVAL_PROTO; |
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207 | return NULL; |
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208 | } |
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209 | |
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210 | switch (xisr->sadb_x_ipsecrequest_mode) { |
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211 | case IPSEC_MODE_ANY: |
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212 | mode = "any"; |
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213 | break; |
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214 | case IPSEC_MODE_TRANSPORT: |
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215 | mode = "transport"; |
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216 | break; |
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217 | case IPSEC_MODE_TUNNEL: |
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218 | mode = "tunnel"; |
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219 | break; |
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220 | default: |
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221 | __ipsec_errcode = EIPSEC_INVAL_MODE; |
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222 | return NULL; |
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223 | } |
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224 | |
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225 | abuf[0] = '\0'; |
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226 | if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) { |
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227 | struct sockaddr *sa1, *sa2; |
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228 | caddr_t p; |
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229 | |
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230 | p = (caddr_t)(xisr + 1); |
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231 | sa1 = (struct sockaddr *)p; |
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232 | sa2 = (struct sockaddr *)(p + sa1->sa_len); |
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233 | if (sizeof(*xisr) + sa1->sa_len + sa2->sa_len != |
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234 | xisr->sadb_x_ipsecrequest_len) { |
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235 | __ipsec_errcode = EIPSEC_INVAL_ADDRESS; |
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236 | return NULL; |
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237 | } |
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238 | if (set_addresses(abuf, sizeof(abuf), sa1, sa2) != 0) { |
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239 | __ipsec_errcode = EIPSEC_INVAL_ADDRESS; |
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240 | return NULL; |
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241 | } |
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242 | } |
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243 | |
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244 | switch (xisr->sadb_x_ipsecrequest_level) { |
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245 | case IPSEC_LEVEL_DEFAULT: |
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246 | level = "default"; |
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247 | break; |
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248 | case IPSEC_LEVEL_USE: |
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249 | level = "use"; |
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250 | break; |
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251 | case IPSEC_LEVEL_REQUIRE: |
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252 | level = "require"; |
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253 | break; |
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254 | case IPSEC_LEVEL_UNIQUE: |
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255 | level = "unique"; |
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256 | break; |
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257 | default: |
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258 | __ipsec_errcode = EIPSEC_INVAL_LEVEL; |
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259 | return NULL; |
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260 | } |
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261 | |
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262 | if (xisr->sadb_x_ipsecrequest_reqid == 0) |
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263 | snprintf(buf, len, "%s/%s/%s/%s", proto, mode, abuf, level); |
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264 | else { |
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265 | int ch; |
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266 | |
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267 | if (xisr->sadb_x_ipsecrequest_reqid > IPSEC_MANUAL_REQID_MAX) |
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268 | ch = '#'; |
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269 | else |
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270 | ch = ':'; |
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271 | snprintf(buf, len, "%s/%s/%s/%s%c%u", proto, mode, abuf, level, |
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272 | ch, xisr->sadb_x_ipsecrequest_reqid); |
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273 | } |
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274 | |
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275 | return buf; |
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276 | } |
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277 | |
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278 | static int |
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279 | set_addresses(buf, len, sa1, sa2) |
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280 | char *buf; |
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281 | size_t len; |
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282 | struct sockaddr *sa1; |
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283 | struct sockaddr *sa2; |
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284 | { |
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285 | char tmp1[NI_MAXHOST], tmp2[NI_MAXHOST]; |
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286 | |
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287 | if (set_address(tmp1, sizeof(tmp1), sa1) == NULL || |
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288 | set_address(tmp2, sizeof(tmp2), sa2) == NULL) |
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289 | return -1; |
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290 | if (strlen(tmp1) + 1 + strlen(tmp2) + 1 > len) |
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291 | return -1; |
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292 | snprintf(buf, len, "%s-%s", tmp1, tmp2); |
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293 | return 0; |
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294 | } |
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295 | |
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296 | static char * |
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297 | set_address(buf, len, sa) |
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298 | char *buf; |
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299 | size_t len; |
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300 | struct sockaddr *sa; |
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301 | { |
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302 | const int niflags = NI_NUMERICHOST; |
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303 | |
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304 | if (len < 1) |
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305 | return NULL; |
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306 | buf[0] = '\0'; |
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307 | if (getnameinfo(sa, sa->sa_len, buf, len, NULL, 0, niflags) != 0) |
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308 | return NULL; |
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309 | return buf; |
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310 | } |
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