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1 | office | 1 | /** |
2 | * @file address_utils.h |
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3 | * @author Ambroz Bizjak <ambrop7@gmail.com> |
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4 | * |
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5 | * @section LICENSE |
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6 | * |
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7 | * Redistribution and use in source and binary forms, with or without |
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8 | * modification, are permitted provided that the following conditions are met: |
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9 | * 1. Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * 2. Redistributions in binary form must reproduce the above copyright |
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12 | * notice, this list of conditions and the following disclaimer in the |
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13 | * documentation and/or other materials provided with the distribution. |
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14 | * 3. Neither the name of the author nor the |
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15 | * names of its contributors may be used to endorse or promote products |
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16 | * derived from this software without specific prior written permission. |
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17 | * |
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18 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND |
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19 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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20 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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21 | * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY |
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22 | * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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23 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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24 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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25 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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27 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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28 | */ |
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29 | |||
30 | #ifndef NCD_ADDRESS_UTILS_H |
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31 | #define NCD_ADDRESS_UTILS_H |
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32 | |||
33 | #include <string.h> |
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34 | #include <limits.h> |
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35 | |||
36 | #include <misc/debug.h> |
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37 | #include <misc/ipaddr.h> |
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38 | #include <misc/ipaddr6.h> |
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39 | #include <misc/byteorder.h> |
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40 | #include <system/BAddr.h> |
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41 | #include <system/BConnectionGeneric.h> |
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42 | #include <ncd/NCDVal.h> |
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43 | #include <ncd/extra/value_utils.h> |
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44 | |||
45 | typedef int (*ncd_read_bconnection_addr_CustomHandler) (void *user, NCDValRef protocol, NCDValRef data); |
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46 | |||
47 | static int ncd_read_baddr (NCDValRef val, BAddr *out) WARN_UNUSED; |
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48 | static NCDValRef ncd_make_baddr (BAddr addr, NCDValMem *mem); |
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49 | static int ncd_read_bconnection_addr (NCDValRef val, struct BConnection_addr *out_addr) WARN_UNUSED; |
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50 | static int ncd_read_bconnection_addr_ext (NCDValRef val, ncd_read_bconnection_addr_CustomHandler custom_handler, void *user, struct BConnection_addr *out_addr) WARN_UNUSED; |
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51 | |||
52 | static int ncd_read_baddr (NCDValRef val, BAddr *out) |
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53 | { |
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54 | ASSERT(!NCDVal_IsInvalid(val)) |
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55 | ASSERT(out) |
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56 | |||
57 | if (!NCDVal_IsList(val)) { |
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58 | goto fail; |
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59 | } |
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60 | |||
61 | NCDValRef type_val; |
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62 | if (!NCDVal_ListReadHead(val, 1, &type_val)) { |
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63 | goto fail; |
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64 | } |
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65 | if (!NCDVal_IsString(type_val)) { |
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66 | goto fail; |
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67 | } |
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68 | |||
69 | BAddr addr; |
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70 | |||
71 | if (NCDVal_StringEquals(type_val, "none")) { |
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72 | if (!NCDVal_ListRead(val, 1, &type_val)) { |
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73 | goto fail; |
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74 | } |
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75 | |||
76 | addr.type = BADDR_TYPE_NONE; |
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77 | } |
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78 | else if (NCDVal_StringEquals(type_val, "ipv4")) { |
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79 | NCDValRef ipaddr_val; |
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80 | NCDValRef port_val; |
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81 | if (!NCDVal_ListRead(val, 3, &type_val, &ipaddr_val, &port_val)) { |
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82 | goto fail; |
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83 | } |
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84 | if (!NCDVal_IsString(ipaddr_val)) { |
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85 | goto fail; |
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86 | } |
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87 | |||
88 | addr.type = BADDR_TYPE_IPV4; |
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89 | |||
90 | if (!ipaddr_parse_ipv4_addr(NCDVal_StringMemRef(ipaddr_val), &addr.ipv4.ip)) { |
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91 | goto fail; |
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92 | } |
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93 | |||
94 | uintmax_t port; |
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95 | if (!ncd_read_uintmax(port_val, &port) || port > UINT16_MAX) { |
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96 | goto fail; |
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97 | } |
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98 | addr.ipv4.port = hton16(port); |
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99 | } |
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100 | else if (NCDVal_StringEquals(type_val, "ipv6")) { |
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101 | NCDValRef ipaddr_val; |
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102 | NCDValRef port_val; |
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103 | if (!NCDVal_ListRead(val, 3, &type_val, &ipaddr_val, &port_val)) { |
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104 | goto fail; |
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105 | } |
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106 | if (!NCDVal_IsString(ipaddr_val)) { |
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107 | goto fail; |
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108 | } |
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109 | |||
110 | addr.type = BADDR_TYPE_IPV6; |
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111 | |||
112 | struct ipv6_addr i6addr; |
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113 | if (!ipaddr6_parse_ipv6_addr(NCDVal_StringMemRef(ipaddr_val), &i6addr)) { |
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114 | goto fail; |
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115 | } |
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116 | memcpy(addr.ipv6.ip, i6addr.bytes, 16); |
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117 | |||
118 | uintmax_t port; |
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119 | if (!ncd_read_uintmax(port_val, &port) || port > UINT16_MAX) { |
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120 | goto fail; |
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121 | } |
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122 | addr.ipv6.port = hton16(port); |
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123 | } |
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124 | else { |
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125 | goto fail; |
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126 | } |
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127 | |||
128 | *out = addr; |
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129 | return 1; |
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130 | |||
131 | fail: |
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132 | return 0; |
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133 | } |
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134 | |||
135 | static NCDValRef ncd_make_baddr (BAddr addr, NCDValMem *mem) |
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136 | { |
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137 | BAddr_Assert(&addr); |
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138 | ASSERT(mem) |
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139 | |||
140 | NCDValRef val; |
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141 | |||
142 | switch (addr.type) { |
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143 | default: |
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144 | case BADDR_TYPE_NONE: { |
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145 | val = NCDVal_NewList(mem, 1); |
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146 | if (NCDVal_IsInvalid(val)) { |
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147 | goto fail; |
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148 | } |
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149 | |||
150 | const char *str = (addr.type == BADDR_TYPE_NONE ? "none" : "unknown"); |
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151 | NCDValRef type_val = NCDVal_NewString(mem, str); |
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152 | if (NCDVal_IsInvalid(type_val)) { |
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153 | goto fail; |
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154 | } |
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155 | |||
156 | if (!NCDVal_ListAppend(val, type_val)) { |
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157 | goto fail; |
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158 | } |
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159 | } break; |
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160 | |||
161 | case BADDR_TYPE_IPV4: { |
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162 | val = NCDVal_NewList(mem, 3); |
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163 | if (NCDVal_IsInvalid(val)) { |
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164 | goto fail; |
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165 | } |
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166 | |||
167 | NCDValRef type_val = NCDVal_NewString(mem, "ipv4"); |
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168 | if (NCDVal_IsInvalid(type_val)) { |
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169 | goto fail; |
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170 | } |
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171 | |||
172 | char ipaddr_buf[IPADDR_PRINT_MAX]; |
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173 | ipaddr_print_addr(addr.ipv4.ip, ipaddr_buf); |
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174 | NCDValRef ipaddr_val = NCDVal_NewString(mem, ipaddr_buf); |
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175 | if (NCDVal_IsInvalid(ipaddr_val)) { |
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176 | goto fail; |
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177 | } |
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178 | |||
179 | NCDValRef port_val = ncd_make_uintmax(mem, ntoh16(addr.ipv4.port)); |
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180 | if (NCDVal_IsInvalid(port_val)) { |
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181 | goto fail; |
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182 | } |
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183 | |||
184 | if (!NCDVal_ListAppend(val, type_val)) { |
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185 | goto fail; |
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186 | } |
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187 | if (!NCDVal_ListAppend(val, ipaddr_val)) { |
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188 | goto fail; |
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189 | } |
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190 | if (!NCDVal_ListAppend(val, port_val)) { |
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191 | goto fail; |
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192 | } |
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193 | } break; |
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194 | |||
195 | case BADDR_TYPE_IPV6: { |
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196 | val = NCDVal_NewList(mem, 3); |
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197 | if (NCDVal_IsInvalid(val)) { |
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198 | goto fail; |
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199 | } |
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200 | |||
201 | NCDValRef type_val = NCDVal_NewString(mem, "ipv6"); |
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202 | if (NCDVal_IsInvalid(type_val)) { |
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203 | goto fail; |
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204 | } |
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205 | |||
206 | char ipaddr_buf[IPADDR6_PRINT_MAX]; |
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207 | struct ipv6_addr i6addr; |
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208 | memcpy(i6addr.bytes, addr.ipv6.ip, 16); |
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209 | ipaddr6_print_addr(i6addr, ipaddr_buf); |
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210 | NCDValRef ipaddr_val = NCDVal_NewString(mem, ipaddr_buf); |
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211 | if (NCDVal_IsInvalid(ipaddr_val)) { |
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212 | goto fail; |
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213 | } |
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214 | |||
215 | NCDValRef port_val = ncd_make_uintmax(mem, ntoh16(addr.ipv6.port)); |
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216 | if (NCDVal_IsInvalid(port_val)) { |
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217 | goto fail; |
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218 | } |
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219 | |||
220 | if (!NCDVal_ListAppend(val, type_val)) { |
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221 | goto fail; |
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222 | } |
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223 | if (!NCDVal_ListAppend(val, ipaddr_val)) { |
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224 | goto fail; |
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225 | } |
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226 | if (!NCDVal_ListAppend(val, port_val)) { |
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227 | goto fail; |
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228 | } |
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229 | } break; |
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230 | } |
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231 | |||
232 | return val; |
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233 | |||
234 | fail: |
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235 | return NCDVal_NewInvalid(); |
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236 | } |
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237 | |||
238 | static int ncd_read_bconnection_addr (NCDValRef val, struct BConnection_addr *out_addr) |
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239 | { |
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240 | return ncd_read_bconnection_addr_ext(val, NULL, NULL, out_addr); |
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241 | } |
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242 | |||
243 | static int ncd_read_bconnection_addr_ext (NCDValRef val, ncd_read_bconnection_addr_CustomHandler custom_handler, void *user, struct BConnection_addr *out_addr) |
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244 | { |
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245 | ASSERT(!NCDVal_IsInvalid(val)) |
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246 | |||
247 | if (!NCDVal_IsList(val)) { |
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248 | goto fail; |
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249 | } |
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250 | |||
251 | NCDValRef protocol_arg; |
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252 | NCDValRef data_arg; |
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253 | if (!NCDVal_ListRead(val, 2, &protocol_arg, &data_arg)) { |
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254 | goto fail; |
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255 | } |
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256 | |||
257 | if (!NCDVal_IsString(protocol_arg)) { |
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258 | goto fail; |
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259 | } |
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260 | |||
261 | if (NCDVal_StringEquals(protocol_arg, "unix")) { |
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262 | if (!NCDVal_IsStringNoNulls(data_arg)) { |
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263 | goto fail; |
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264 | } |
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265 | |||
266 | *out_addr = BConnection_addr_unix(NCDVal_StringMemRef(data_arg)); |
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267 | } |
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268 | else if (NCDVal_StringEquals(protocol_arg, "tcp")) { |
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269 | BAddr baddr; |
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270 | if (!ncd_read_baddr(data_arg, &baddr)) { |
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271 | goto fail; |
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272 | } |
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273 | |||
274 | *out_addr = BConnection_addr_baddr(baddr); |
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275 | } |
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276 | else { |
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277 | if (!custom_handler || !custom_handler(user, protocol_arg, data_arg)) { |
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278 | goto fail; |
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279 | } |
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280 | |||
281 | out_addr->type = -1; |
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282 | } |
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283 | |||
284 | return 1; |
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285 | |||
286 | fail: |
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287 | return 0; |
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288 | } |
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289 | |||
290 | #endif |