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1 | office | 1 | /** |
2 | * @file |
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3 | * Management Information Base II (RFC1213) IP objects and functions. |
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4 | */ |
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5 | |||
6 | /* |
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7 | * Copyright (c) 2006 Axon Digital Design B.V., The Netherlands. |
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8 | * All rights reserved. |
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9 | * |
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10 | * Redistribution and use in source and binary forms, with or without modification, |
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11 | * are permitted provided that the following conditions are met: |
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12 | * |
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13 | * 1. Redistributions of source code must retain the above copyright notice, |
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14 | * this list of conditions and the following disclaimer. |
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15 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
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16 | * this list of conditions and the following disclaimer in the documentation |
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17 | * and/or other materials provided with the distribution. |
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18 | * 3. The name of the author may not be used to endorse or promote products |
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19 | * derived from this software without specific prior written permission. |
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20 | * |
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21 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
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22 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
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23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT |
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24 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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25 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT |
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26 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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27 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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28 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
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29 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY |
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30 | * OF SUCH DAMAGE. |
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31 | * |
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32 | * Author: Dirk Ziegelmeier <dziegel@gmx.de> |
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33 | * Christiaan Simons <christiaan.simons@axon.tv> |
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34 | */ |
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35 | |||
36 | #include "lwip/snmp.h" |
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37 | #include "lwip/apps/snmp.h" |
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38 | #include "lwip/apps/snmp_core.h" |
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39 | #include "lwip/apps/snmp_mib2.h" |
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40 | #include "lwip/apps/snmp_table.h" |
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41 | #include "lwip/apps/snmp_scalar.h" |
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42 | #include "lwip/stats.h" |
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43 | #include "lwip/netif.h" |
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44 | #include "lwip/ip.h" |
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45 | #include "lwip/etharp.h" |
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46 | |||
47 | #if LWIP_SNMP && SNMP_LWIP_MIB2 |
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48 | |||
49 | #if SNMP_USE_NETCONN |
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50 | #define SYNC_NODE_NAME(node_name) node_name ## _synced |
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51 | #define CREATE_LWIP_SYNC_NODE(oid, node_name) \ |
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52 | static const struct snmp_threadsync_node node_name ## _synced = SNMP_CREATE_THREAD_SYNC_NODE(oid, &node_name.node, &snmp_mib2_lwip_locks); |
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53 | #else |
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54 | #define SYNC_NODE_NAME(node_name) node_name |
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55 | #define CREATE_LWIP_SYNC_NODE(oid, node_name) |
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56 | #endif |
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57 | |||
58 | #if LWIP_IPV4 |
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59 | /* --- ip .1.3.6.1.2.1.4 ----------------------------------------------------- */ |
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60 | |||
61 | static s16_t |
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62 | ip_get_value(struct snmp_node_instance *instance, void *value) |
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63 | { |
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64 | s32_t *sint_ptr = (s32_t *)value; |
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65 | u32_t *uint_ptr = (u32_t *)value; |
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66 | |||
67 | switch (instance->node->oid) { |
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68 | case 1: /* ipForwarding */ |
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69 | #if IP_FORWARD |
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70 | /* forwarding */ |
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71 | *sint_ptr = 1; |
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72 | #else |
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73 | /* not-forwarding */ |
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74 | *sint_ptr = 2; |
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75 | #endif |
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76 | return sizeof(*sint_ptr); |
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77 | case 2: /* ipDefaultTTL */ |
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78 | *sint_ptr = IP_DEFAULT_TTL; |
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79 | return sizeof(*sint_ptr); |
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80 | case 3: /* ipInReceives */ |
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81 | *uint_ptr = STATS_GET(mib2.ipinreceives); |
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82 | return sizeof(*uint_ptr); |
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83 | case 4: /* ipInHdrErrors */ |
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84 | *uint_ptr = STATS_GET(mib2.ipinhdrerrors); |
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85 | return sizeof(*uint_ptr); |
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86 | case 5: /* ipInAddrErrors */ |
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87 | *uint_ptr = STATS_GET(mib2.ipinaddrerrors); |
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88 | return sizeof(*uint_ptr); |
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89 | case 6: /* ipForwDatagrams */ |
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90 | *uint_ptr = STATS_GET(mib2.ipforwdatagrams); |
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91 | return sizeof(*uint_ptr); |
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92 | case 7: /* ipInUnknownProtos */ |
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93 | *uint_ptr = STATS_GET(mib2.ipinunknownprotos); |
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94 | return sizeof(*uint_ptr); |
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95 | case 8: /* ipInDiscards */ |
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96 | *uint_ptr = STATS_GET(mib2.ipindiscards); |
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97 | return sizeof(*uint_ptr); |
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98 | case 9: /* ipInDelivers */ |
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99 | *uint_ptr = STATS_GET(mib2.ipindelivers); |
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100 | return sizeof(*uint_ptr); |
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101 | case 10: /* ipOutRequests */ |
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102 | *uint_ptr = STATS_GET(mib2.ipoutrequests); |
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103 | return sizeof(*uint_ptr); |
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104 | case 11: /* ipOutDiscards */ |
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105 | *uint_ptr = STATS_GET(mib2.ipoutdiscards); |
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106 | return sizeof(*uint_ptr); |
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107 | case 12: /* ipOutNoRoutes */ |
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108 | *uint_ptr = STATS_GET(mib2.ipoutnoroutes); |
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109 | return sizeof(*uint_ptr); |
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110 | case 13: /* ipReasmTimeout */ |
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111 | #if IP_REASSEMBLY |
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112 | *sint_ptr = IP_REASS_MAXAGE; |
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113 | #else |
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114 | *sint_ptr = 0; |
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115 | #endif |
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116 | return sizeof(*sint_ptr); |
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117 | case 14: /* ipReasmReqds */ |
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118 | *uint_ptr = STATS_GET(mib2.ipreasmreqds); |
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119 | return sizeof(*uint_ptr); |
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120 | case 15: /* ipReasmOKs */ |
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121 | *uint_ptr = STATS_GET(mib2.ipreasmoks); |
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122 | return sizeof(*uint_ptr); |
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123 | case 16: /* ipReasmFails */ |
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124 | *uint_ptr = STATS_GET(mib2.ipreasmfails); |
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125 | return sizeof(*uint_ptr); |
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126 | case 17: /* ipFragOKs */ |
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127 | *uint_ptr = STATS_GET(mib2.ipfragoks); |
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128 | return sizeof(*uint_ptr); |
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129 | case 18: /* ipFragFails */ |
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130 | *uint_ptr = STATS_GET(mib2.ipfragfails); |
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131 | return sizeof(*uint_ptr); |
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132 | case 19: /* ipFragCreates */ |
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133 | *uint_ptr = STATS_GET(mib2.ipfragcreates); |
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134 | return sizeof(*uint_ptr); |
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135 | case 23: /* ipRoutingDiscards: not supported -> always 0 */ |
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136 | *uint_ptr = 0; |
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137 | return sizeof(*uint_ptr); |
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138 | default: |
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139 | LWIP_DEBUGF(SNMP_MIB_DEBUG, ("ip_get_value(): unknown id: %"S32_F"\n", instance->node->oid)); |
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140 | break; |
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141 | } |
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142 | |||
143 | return 0; |
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144 | } |
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145 | |||
146 | /** |
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147 | * Test ip object value before setting. |
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148 | * |
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149 | * @param instance node instance |
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150 | * @param len return value space (in bytes) |
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151 | * @param value points to (varbind) space to copy value from. |
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152 | * |
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153 | * @note we allow set if the value matches the hardwired value, |
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154 | * otherwise return badvalue. |
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155 | */ |
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156 | static snmp_err_t |
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157 | ip_set_test(struct snmp_node_instance *instance, u16_t len, void *value) |
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158 | { |
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159 | snmp_err_t ret = SNMP_ERR_WRONGVALUE; |
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160 | s32_t *sint_ptr = (s32_t *)value; |
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161 | |||
162 | LWIP_UNUSED_ARG(len); |
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163 | switch (instance->node->oid) { |
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164 | case 1: /* ipForwarding */ |
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165 | #if IP_FORWARD |
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166 | /* forwarding */ |
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167 | if (*sint_ptr == 1) |
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168 | #else |
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169 | /* not-forwarding */ |
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170 | if (*sint_ptr == 2) |
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171 | #endif |
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172 | { |
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173 | ret = SNMP_ERR_NOERROR; |
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174 | } |
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175 | break; |
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176 | case 2: /* ipDefaultTTL */ |
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177 | if (*sint_ptr == IP_DEFAULT_TTL) { |
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178 | ret = SNMP_ERR_NOERROR; |
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179 | } |
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180 | break; |
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181 | default: |
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182 | LWIP_DEBUGF(SNMP_MIB_DEBUG, ("ip_set_test(): unknown id: %"S32_F"\n", instance->node->oid)); |
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183 | break; |
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184 | } |
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185 | |||
186 | return ret; |
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187 | } |
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188 | |||
189 | static snmp_err_t |
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190 | ip_set_value(struct snmp_node_instance *instance, u16_t len, void *value) |
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191 | { |
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192 | LWIP_UNUSED_ARG(instance); |
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193 | LWIP_UNUSED_ARG(len); |
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194 | LWIP_UNUSED_ARG(value); |
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195 | /* nothing to do here because in set_test we only accept values being the same as our own stored value -> no need to store anything */ |
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196 | return SNMP_ERR_NOERROR; |
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197 | } |
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198 | |||
199 | /* --- ipAddrTable --- */ |
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200 | |||
201 | /* list of allowed value ranges for incoming OID */ |
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202 | static const struct snmp_oid_range ip_AddrTable_oid_ranges[] = { |
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203 | { 0, 0xff }, /* IP A */ |
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204 | { 0, 0xff }, /* IP B */ |
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205 | { 0, 0xff }, /* IP C */ |
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206 | { 0, 0xff } /* IP D */ |
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207 | }; |
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208 | |||
209 | static snmp_err_t |
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210 | ip_AddrTable_get_cell_value_core(struct netif *netif, const u32_t *column, union snmp_variant_value *value, u32_t *value_len) |
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211 | { |
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212 | LWIP_UNUSED_ARG(value_len); |
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213 | |||
214 | switch (*column) { |
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215 | case 1: /* ipAdEntAddr */ |
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216 | value->u32 = netif_ip4_addr(netif)->addr; |
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217 | break; |
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218 | case 2: /* ipAdEntIfIndex */ |
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219 | value->u32 = netif_to_num(netif); |
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220 | break; |
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221 | case 3: /* ipAdEntNetMask */ |
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222 | value->u32 = netif_ip4_netmask(netif)->addr; |
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223 | break; |
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224 | case 4: /* ipAdEntBcastAddr */ |
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225 | /* lwIP oddity, there's no broadcast |
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226 | address in the netif we can rely on */ |
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227 | value->u32 = IPADDR_BROADCAST & 1; |
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228 | break; |
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229 | case 5: /* ipAdEntReasmMaxSize */ |
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230 | #if IP_REASSEMBLY |
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231 | /* @todo The theoretical maximum is IP_REASS_MAX_PBUFS * size of the pbufs, |
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232 | * but only if receiving one fragmented packet at a time. |
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233 | * The current solution is to calculate for 2 simultaneous packets... |
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234 | */ |
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235 | value->u32 = (IP_HLEN + ((IP_REASS_MAX_PBUFS / 2) * |
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236 | (PBUF_POOL_BUFSIZE - PBUF_LINK_ENCAPSULATION_HLEN - PBUF_LINK_HLEN - IP_HLEN))); |
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237 | #else |
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238 | /** @todo returning MTU would be a bad thing and |
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239 | returning a wild guess like '576' isn't good either */ |
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240 | value->u32 = 0; |
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241 | #endif |
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242 | break; |
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243 | default: |
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244 | return SNMP_ERR_NOSUCHINSTANCE; |
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245 | } |
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246 | |||
247 | return SNMP_ERR_NOERROR; |
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248 | } |
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249 | |||
250 | static snmp_err_t |
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251 | ip_AddrTable_get_cell_value(const u32_t *column, const u32_t *row_oid, u8_t row_oid_len, union snmp_variant_value *value, u32_t *value_len) |
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252 | { |
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253 | ip4_addr_t ip; |
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254 | struct netif *netif; |
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255 | |||
256 | /* check if incoming OID length and if values are in plausible range */ |
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257 | if (!snmp_oid_in_range(row_oid, row_oid_len, ip_AddrTable_oid_ranges, LWIP_ARRAYSIZE(ip_AddrTable_oid_ranges))) { |
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258 | return SNMP_ERR_NOSUCHINSTANCE; |
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259 | } |
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260 | |||
261 | /* get IP from incoming OID */ |
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262 | snmp_oid_to_ip4(&row_oid[0], &ip); /* we know it succeeds because of oid_in_range check above */ |
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263 | |||
264 | /* find netif with requested ip */ |
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265 | NETIF_FOREACH(netif) { |
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266 | if (ip4_addr_cmp(&ip, netif_ip4_addr(netif))) { |
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267 | /* fill in object properties */ |
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268 | return ip_AddrTable_get_cell_value_core(netif, column, value, value_len); |
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269 | } |
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270 | } |
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271 | |||
272 | /* not found */ |
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273 | return SNMP_ERR_NOSUCHINSTANCE; |
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274 | } |
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275 | |||
276 | static snmp_err_t |
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277 | ip_AddrTable_get_next_cell_instance_and_value(const u32_t *column, struct snmp_obj_id *row_oid, union snmp_variant_value *value, u32_t *value_len) |
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278 | { |
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279 | struct netif *netif; |
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280 | struct snmp_next_oid_state state; |
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281 | u32_t result_temp[LWIP_ARRAYSIZE(ip_AddrTable_oid_ranges)]; |
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282 | |||
283 | /* init struct to search next oid */ |
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284 | snmp_next_oid_init(&state, row_oid->id, row_oid->len, result_temp, LWIP_ARRAYSIZE(ip_AddrTable_oid_ranges)); |
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285 | |||
286 | /* iterate over all possible OIDs to find the next one */ |
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287 | NETIF_FOREACH(netif) { |
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288 | u32_t test_oid[LWIP_ARRAYSIZE(ip_AddrTable_oid_ranges)]; |
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289 | snmp_ip4_to_oid(netif_ip4_addr(netif), &test_oid[0]); |
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290 | |||
291 | /* check generated OID: is it a candidate for the next one? */ |
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292 | snmp_next_oid_check(&state, test_oid, LWIP_ARRAYSIZE(ip_AddrTable_oid_ranges), netif); |
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293 | } |
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294 | |||
295 | /* did we find a next one? */ |
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296 | if (state.status == SNMP_NEXT_OID_STATUS_SUCCESS) { |
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297 | snmp_oid_assign(row_oid, state.next_oid, state.next_oid_len); |
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298 | /* fill in object properties */ |
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299 | return ip_AddrTable_get_cell_value_core((struct netif *)state.reference, column, value, value_len); |
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300 | } |
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301 | |||
302 | /* not found */ |
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303 | return SNMP_ERR_NOSUCHINSTANCE; |
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304 | } |
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305 | |||
306 | /* --- ipRouteTable --- */ |
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307 | |||
308 | /* list of allowed value ranges for incoming OID */ |
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309 | static const struct snmp_oid_range ip_RouteTable_oid_ranges[] = { |
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310 | { 0, 0xff }, /* IP A */ |
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311 | { 0, 0xff }, /* IP B */ |
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312 | { 0, 0xff }, /* IP C */ |
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313 | { 0, 0xff }, /* IP D */ |
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314 | }; |
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315 | |||
316 | static snmp_err_t |
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317 | ip_RouteTable_get_cell_value_core(struct netif *netif, u8_t default_route, const u32_t *column, union snmp_variant_value *value, u32_t *value_len) |
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318 | { |
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319 | switch (*column) { |
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320 | case 1: /* ipRouteDest */ |
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321 | if (default_route) { |
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322 | /* default rte has 0.0.0.0 dest */ |
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323 | value->u32 = IP4_ADDR_ANY4->addr; |
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324 | } else { |
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325 | /* netifs have netaddress dest */ |
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326 | ip4_addr_t tmp; |
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327 | ip4_addr_get_network(&tmp, netif_ip4_addr(netif), netif_ip4_netmask(netif)); |
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328 | value->u32 = tmp.addr; |
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329 | } |
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330 | break; |
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331 | case 2: /* ipRouteIfIndex */ |
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332 | value->u32 = netif_to_num(netif); |
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333 | break; |
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334 | case 3: /* ipRouteMetric1 */ |
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335 | if (default_route) { |
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336 | value->s32 = 1; /* default */ |
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337 | } else { |
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338 | value->s32 = 0; /* normal */ |
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339 | } |
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340 | break; |
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341 | case 4: /* ipRouteMetric2 */ |
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342 | case 5: /* ipRouteMetric3 */ |
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343 | case 6: /* ipRouteMetric4 */ |
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344 | value->s32 = -1; /* none */ |
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345 | break; |
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346 | case 7: /* ipRouteNextHop */ |
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347 | if (default_route) { |
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348 | /* default rte: gateway */ |
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349 | value->u32 = netif_ip4_gw(netif)->addr; |
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350 | } else { |
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351 | /* other rtes: netif ip_addr */ |
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352 | value->u32 = netif_ip4_addr(netif)->addr; |
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353 | } |
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354 | break; |
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355 | case 8: /* ipRouteType */ |
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356 | if (default_route) { |
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357 | /* default rte is indirect */ |
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358 | value->u32 = 4; /* indirect */ |
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359 | } else { |
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360 | /* other rtes are direct */ |
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361 | value->u32 = 3; /* direct */ |
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362 | } |
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363 | break; |
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364 | case 9: /* ipRouteProto */ |
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365 | /* locally defined routes */ |
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366 | value->u32 = 2; /* local */ |
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367 | break; |
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368 | case 10: /* ipRouteAge */ |
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369 | /* @todo (sysuptime - timestamp last change) / 100 */ |
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370 | value->u32 = 0; |
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371 | break; |
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372 | case 11: /* ipRouteMask */ |
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373 | if (default_route) { |
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374 | /* default rte use 0.0.0.0 mask */ |
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375 | value->u32 = IP4_ADDR_ANY4->addr; |
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376 | } else { |
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377 | /* other rtes use netmask */ |
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378 | value->u32 = netif_ip4_netmask(netif)->addr; |
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379 | } |
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380 | break; |
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381 | case 12: /* ipRouteMetric5 */ |
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382 | value->s32 = -1; /* none */ |
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383 | break; |
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384 | case 13: /* ipRouteInfo */ |
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385 | value->const_ptr = snmp_zero_dot_zero.id; |
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386 | *value_len = snmp_zero_dot_zero.len * sizeof(u32_t); |
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387 | break; |
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388 | default: |
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389 | return SNMP_ERR_NOSUCHINSTANCE; |
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390 | } |
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391 | |||
392 | return SNMP_ERR_NOERROR; |
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393 | } |
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394 | |||
395 | static snmp_err_t |
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396 | ip_RouteTable_get_cell_value(const u32_t *column, const u32_t *row_oid, u8_t row_oid_len, union snmp_variant_value *value, u32_t *value_len) |
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397 | { |
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398 | ip4_addr_t test_ip; |
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399 | struct netif *netif; |
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400 | |||
401 | /* check if incoming OID length and if values are in plausible range */ |
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402 | if (!snmp_oid_in_range(row_oid, row_oid_len, ip_RouteTable_oid_ranges, LWIP_ARRAYSIZE(ip_RouteTable_oid_ranges))) { |
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403 | return SNMP_ERR_NOSUCHINSTANCE; |
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404 | } |
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405 | |||
406 | /* get IP and port from incoming OID */ |
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407 | snmp_oid_to_ip4(&row_oid[0], &test_ip); /* we know it succeeds because of oid_in_range check above */ |
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408 | |||
409 | /* default route is on default netif */ |
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410 | if (ip4_addr_isany_val(test_ip) && (netif_default != NULL)) { |
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411 | /* fill in object properties */ |
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412 | return ip_RouteTable_get_cell_value_core(netif_default, 1, column, value, value_len); |
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413 | } |
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414 | |||
415 | /* find netif with requested route */ |
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416 | NETIF_FOREACH(netif) { |
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417 | ip4_addr_t dst; |
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418 | ip4_addr_get_network(&dst, netif_ip4_addr(netif), netif_ip4_netmask(netif)); |
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419 | |||
420 | if (ip4_addr_cmp(&dst, &test_ip)) { |
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421 | /* fill in object properties */ |
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422 | return ip_RouteTable_get_cell_value_core(netif, 0, column, value, value_len); |
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423 | } |
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424 | } |
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425 | |||
426 | /* not found */ |
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427 | return SNMP_ERR_NOSUCHINSTANCE; |
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428 | } |
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429 | |||
430 | static snmp_err_t |
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431 | ip_RouteTable_get_next_cell_instance_and_value(const u32_t *column, struct snmp_obj_id *row_oid, union snmp_variant_value *value, u32_t *value_len) |
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432 | { |
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433 | struct netif *netif; |
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434 | struct snmp_next_oid_state state; |
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435 | u32_t result_temp[LWIP_ARRAYSIZE(ip_RouteTable_oid_ranges)]; |
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436 | u32_t test_oid[LWIP_ARRAYSIZE(ip_RouteTable_oid_ranges)]; |
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437 | |||
438 | /* init struct to search next oid */ |
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439 | snmp_next_oid_init(&state, row_oid->id, row_oid->len, result_temp, LWIP_ARRAYSIZE(ip_RouteTable_oid_ranges)); |
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440 | |||
441 | /* check default route */ |
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442 | if (netif_default != NULL) { |
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443 | snmp_ip4_to_oid(IP4_ADDR_ANY4, &test_oid[0]); |
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444 | snmp_next_oid_check(&state, test_oid, LWIP_ARRAYSIZE(ip_RouteTable_oid_ranges), netif_default); |
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445 | } |
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446 | |||
447 | /* iterate over all possible OIDs to find the next one */ |
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448 | NETIF_FOREACH(netif) { |
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449 | ip4_addr_t dst; |
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450 | ip4_addr_get_network(&dst, netif_ip4_addr(netif), netif_ip4_netmask(netif)); |
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451 | |||
452 | /* check generated OID: is it a candidate for the next one? */ |
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453 | if (!ip4_addr_isany_val(dst)) { |
||
454 | snmp_ip4_to_oid(&dst, &test_oid[0]); |
||
455 | snmp_next_oid_check(&state, test_oid, LWIP_ARRAYSIZE(ip_RouteTable_oid_ranges), netif); |
||
456 | } |
||
457 | } |
||
458 | |||
459 | /* did we find a next one? */ |
||
460 | if (state.status == SNMP_NEXT_OID_STATUS_SUCCESS) { |
||
461 | ip4_addr_t dst; |
||
462 | snmp_oid_to_ip4(&result_temp[0], &dst); |
||
463 | snmp_oid_assign(row_oid, state.next_oid, state.next_oid_len); |
||
464 | /* fill in object properties */ |
||
465 | return ip_RouteTable_get_cell_value_core((struct netif *)state.reference, ip4_addr_isany_val(dst), column, value, value_len); |
||
466 | } else { |
||
467 | /* not found */ |
||
468 | return SNMP_ERR_NOSUCHINSTANCE; |
||
469 | } |
||
470 | } |
||
471 | |||
472 | #if LWIP_ARP && LWIP_IPV4 |
||
473 | /* --- ipNetToMediaTable --- */ |
||
474 | |||
475 | /* list of allowed value ranges for incoming OID */ |
||
476 | static const struct snmp_oid_range ip_NetToMediaTable_oid_ranges[] = { |
||
477 | { 1, 0xff }, /* IfIndex */ |
||
478 | { 0, 0xff }, /* IP A */ |
||
479 | { 0, 0xff }, /* IP B */ |
||
480 | { 0, 0xff }, /* IP C */ |
||
481 | { 0, 0xff } /* IP D */ |
||
482 | }; |
||
483 | |||
484 | static snmp_err_t |
||
485 | ip_NetToMediaTable_get_cell_value_core(u8_t arp_table_index, const u32_t *column, union snmp_variant_value *value, u32_t *value_len) |
||
486 | { |
||
487 | ip4_addr_t *ip; |
||
488 | struct netif *netif; |
||
489 | struct eth_addr *ethaddr; |
||
490 | |||
491 | etharp_get_entry(arp_table_index, &ip, &netif, ðaddr); |
||
492 | |||
493 | /* value */ |
||
494 | switch (*column) { |
||
495 | case 1: /* atIfIndex / ipNetToMediaIfIndex */ |
||
496 | value->u32 = netif_to_num(netif); |
||
497 | break; |
||
498 | case 2: /* atPhysAddress / ipNetToMediaPhysAddress */ |
||
499 | value->ptr = ethaddr; |
||
500 | *value_len = sizeof(*ethaddr); |
||
501 | break; |
||
502 | case 3: /* atNetAddress / ipNetToMediaNetAddress */ |
||
503 | value->u32 = ip->addr; |
||
504 | break; |
||
505 | case 4: /* ipNetToMediaType */ |
||
506 | value->u32 = 3; /* dynamic*/ |
||
507 | break; |
||
508 | default: |
||
509 | return SNMP_ERR_NOSUCHINSTANCE; |
||
510 | } |
||
511 | |||
512 | return SNMP_ERR_NOERROR; |
||
513 | } |
||
514 | |||
515 | static snmp_err_t |
||
516 | ip_NetToMediaTable_get_cell_value(const u32_t *column, const u32_t *row_oid, u8_t row_oid_len, union snmp_variant_value *value, u32_t *value_len) |
||
517 | { |
||
518 | ip4_addr_t ip_in; |
||
519 | u8_t netif_index; |
||
520 | u8_t i; |
||
521 | |||
522 | /* check if incoming OID length and if values are in plausible range */ |
||
523 | if (!snmp_oid_in_range(row_oid, row_oid_len, ip_NetToMediaTable_oid_ranges, LWIP_ARRAYSIZE(ip_NetToMediaTable_oid_ranges))) { |
||
524 | return SNMP_ERR_NOSUCHINSTANCE; |
||
525 | } |
||
526 | |||
527 | /* get IP from incoming OID */ |
||
528 | netif_index = (u8_t)row_oid[0]; |
||
529 | snmp_oid_to_ip4(&row_oid[1], &ip_in); /* we know it succeeds because of oid_in_range check above */ |
||
530 | |||
531 | /* find requested entry */ |
||
532 | for (i = 0; i < ARP_TABLE_SIZE; i++) { |
||
533 | ip4_addr_t *ip; |
||
534 | struct netif *netif; |
||
535 | struct eth_addr *ethaddr; |
||
536 | |||
537 | if (etharp_get_entry(i, &ip, &netif, ðaddr)) { |
||
538 | if ((netif_index == netif_to_num(netif)) && ip4_addr_cmp(&ip_in, ip)) { |
||
539 | /* fill in object properties */ |
||
540 | return ip_NetToMediaTable_get_cell_value_core(i, column, value, value_len); |
||
541 | } |
||
542 | } |
||
543 | } |
||
544 | |||
545 | /* not found */ |
||
546 | return SNMP_ERR_NOSUCHINSTANCE; |
||
547 | } |
||
548 | |||
549 | static snmp_err_t |
||
550 | ip_NetToMediaTable_get_next_cell_instance_and_value(const u32_t *column, struct snmp_obj_id *row_oid, union snmp_variant_value *value, u32_t *value_len) |
||
551 | { |
||
552 | u8_t i; |
||
553 | struct snmp_next_oid_state state; |
||
554 | u32_t result_temp[LWIP_ARRAYSIZE(ip_NetToMediaTable_oid_ranges)]; |
||
555 | |||
556 | /* init struct to search next oid */ |
||
557 | snmp_next_oid_init(&state, row_oid->id, row_oid->len, result_temp, LWIP_ARRAYSIZE(ip_NetToMediaTable_oid_ranges)); |
||
558 | |||
559 | /* iterate over all possible OIDs to find the next one */ |
||
560 | for (i = 0; i < ARP_TABLE_SIZE; i++) { |
||
561 | ip4_addr_t *ip; |
||
562 | struct netif *netif; |
||
563 | struct eth_addr *ethaddr; |
||
564 | |||
565 | if (etharp_get_entry(i, &ip, &netif, ðaddr)) { |
||
566 | u32_t test_oid[LWIP_ARRAYSIZE(ip_NetToMediaTable_oid_ranges)]; |
||
567 | |||
568 | test_oid[0] = netif_to_num(netif); |
||
569 | snmp_ip4_to_oid(ip, &test_oid[1]); |
||
570 | |||
571 | /* check generated OID: is it a candidate for the next one? */ |
||
572 | snmp_next_oid_check(&state, test_oid, LWIP_ARRAYSIZE(ip_NetToMediaTable_oid_ranges), LWIP_PTR_NUMERIC_CAST(void *, i)); |
||
573 | } |
||
574 | } |
||
575 | |||
576 | /* did we find a next one? */ |
||
577 | if (state.status == SNMP_NEXT_OID_STATUS_SUCCESS) { |
||
578 | snmp_oid_assign(row_oid, state.next_oid, state.next_oid_len); |
||
579 | /* fill in object properties */ |
||
580 | return ip_NetToMediaTable_get_cell_value_core(LWIP_PTR_NUMERIC_CAST(u8_t, state.reference), column, value, value_len); |
||
581 | } |
||
582 | |||
583 | /* not found */ |
||
584 | return SNMP_ERR_NOSUCHINSTANCE; |
||
585 | } |
||
586 | |||
587 | #endif /* LWIP_ARP && LWIP_IPV4 */ |
||
588 | |||
589 | static const struct snmp_scalar_node ip_Forwarding = SNMP_SCALAR_CREATE_NODE(1, SNMP_NODE_INSTANCE_READ_WRITE, SNMP_ASN1_TYPE_INTEGER, ip_get_value, ip_set_test, ip_set_value); |
||
590 | static const struct snmp_scalar_node ip_DefaultTTL = SNMP_SCALAR_CREATE_NODE(2, SNMP_NODE_INSTANCE_READ_WRITE, SNMP_ASN1_TYPE_INTEGER, ip_get_value, ip_set_test, ip_set_value); |
||
591 | static const struct snmp_scalar_node ip_InReceives = SNMP_SCALAR_CREATE_NODE_READONLY(3, SNMP_ASN1_TYPE_COUNTER, ip_get_value); |
||
592 | static const struct snmp_scalar_node ip_InHdrErrors = SNMP_SCALAR_CREATE_NODE_READONLY(4, SNMP_ASN1_TYPE_COUNTER, ip_get_value); |
||
593 | static const struct snmp_scalar_node ip_InAddrErrors = SNMP_SCALAR_CREATE_NODE_READONLY(5, SNMP_ASN1_TYPE_COUNTER, ip_get_value); |
||
594 | static const struct snmp_scalar_node ip_ForwDatagrams = SNMP_SCALAR_CREATE_NODE_READONLY(6, SNMP_ASN1_TYPE_COUNTER, ip_get_value); |
||
595 | static const struct snmp_scalar_node ip_InUnknownProtos = SNMP_SCALAR_CREATE_NODE_READONLY(7, SNMP_ASN1_TYPE_COUNTER, ip_get_value); |
||
596 | static const struct snmp_scalar_node ip_InDiscards = SNMP_SCALAR_CREATE_NODE_READONLY(8, SNMP_ASN1_TYPE_COUNTER, ip_get_value); |
||
597 | static const struct snmp_scalar_node ip_InDelivers = SNMP_SCALAR_CREATE_NODE_READONLY(9, SNMP_ASN1_TYPE_COUNTER, ip_get_value); |
||
598 | static const struct snmp_scalar_node ip_OutRequests = SNMP_SCALAR_CREATE_NODE_READONLY(10, SNMP_ASN1_TYPE_COUNTER, ip_get_value); |
||
599 | static const struct snmp_scalar_node ip_OutDiscards = SNMP_SCALAR_CREATE_NODE_READONLY(11, SNMP_ASN1_TYPE_COUNTER, ip_get_value); |
||
600 | static const struct snmp_scalar_node ip_OutNoRoutes = SNMP_SCALAR_CREATE_NODE_READONLY(12, SNMP_ASN1_TYPE_COUNTER, ip_get_value); |
||
601 | static const struct snmp_scalar_node ip_ReasmTimeout = SNMP_SCALAR_CREATE_NODE_READONLY(13, SNMP_ASN1_TYPE_INTEGER, ip_get_value); |
||
602 | static const struct snmp_scalar_node ip_ReasmReqds = SNMP_SCALAR_CREATE_NODE_READONLY(14, SNMP_ASN1_TYPE_COUNTER, ip_get_value); |
||
603 | static const struct snmp_scalar_node ip_ReasmOKs = SNMP_SCALAR_CREATE_NODE_READONLY(15, SNMP_ASN1_TYPE_COUNTER, ip_get_value); |
||
604 | static const struct snmp_scalar_node ip_ReasmFails = SNMP_SCALAR_CREATE_NODE_READONLY(16, SNMP_ASN1_TYPE_COUNTER, ip_get_value); |
||
605 | static const struct snmp_scalar_node ip_FragOKs = SNMP_SCALAR_CREATE_NODE_READONLY(17, SNMP_ASN1_TYPE_COUNTER, ip_get_value); |
||
606 | static const struct snmp_scalar_node ip_FragFails = SNMP_SCALAR_CREATE_NODE_READONLY(18, SNMP_ASN1_TYPE_COUNTER, ip_get_value); |
||
607 | static const struct snmp_scalar_node ip_FragCreates = SNMP_SCALAR_CREATE_NODE_READONLY(19, SNMP_ASN1_TYPE_COUNTER, ip_get_value); |
||
608 | static const struct snmp_scalar_node ip_RoutingDiscards = SNMP_SCALAR_CREATE_NODE_READONLY(23, SNMP_ASN1_TYPE_COUNTER, ip_get_value); |
||
609 | |||
610 | static const struct snmp_table_simple_col_def ip_AddrTable_columns[] = { |
||
611 | { 1, SNMP_ASN1_TYPE_IPADDR, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipAdEntAddr */ |
||
612 | { 2, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipAdEntIfIndex */ |
||
613 | { 3, SNMP_ASN1_TYPE_IPADDR, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipAdEntNetMask */ |
||
614 | { 4, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipAdEntBcastAddr */ |
||
615 | { 5, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_U32 } /* ipAdEntReasmMaxSize */ |
||
616 | }; |
||
617 | |||
618 | static const struct snmp_table_simple_node ip_AddrTable = SNMP_TABLE_CREATE_SIMPLE(20, ip_AddrTable_columns, ip_AddrTable_get_cell_value, ip_AddrTable_get_next_cell_instance_and_value); |
||
619 | |||
620 | static const struct snmp_table_simple_col_def ip_RouteTable_columns[] = { |
||
621 | { 1, SNMP_ASN1_TYPE_IPADDR, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipRouteDest */ |
||
622 | { 2, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipRouteIfIndex */ |
||
623 | { 3, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_S32 }, /* ipRouteMetric1 */ |
||
624 | { 4, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_S32 }, /* ipRouteMetric2 */ |
||
625 | { 5, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_S32 }, /* ipRouteMetric3 */ |
||
626 | { 6, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_S32 }, /* ipRouteMetric4 */ |
||
627 | { 7, SNMP_ASN1_TYPE_IPADDR, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipRouteNextHop */ |
||
628 | { 8, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipRouteType */ |
||
629 | { 9, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipRouteProto */ |
||
630 | { 10, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipRouteAge */ |
||
631 | { 11, SNMP_ASN1_TYPE_IPADDR, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipRouteMask */ |
||
632 | { 12, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_S32 }, /* ipRouteMetric5 */ |
||
633 | { 13, SNMP_ASN1_TYPE_OBJECT_ID, SNMP_VARIANT_VALUE_TYPE_PTR } /* ipRouteInfo */ |
||
634 | }; |
||
635 | |||
636 | static const struct snmp_table_simple_node ip_RouteTable = SNMP_TABLE_CREATE_SIMPLE(21, ip_RouteTable_columns, ip_RouteTable_get_cell_value, ip_RouteTable_get_next_cell_instance_and_value); |
||
637 | #endif /* LWIP_IPV4 */ |
||
638 | |||
639 | #if LWIP_ARP && LWIP_IPV4 |
||
640 | static const struct snmp_table_simple_col_def ip_NetToMediaTable_columns[] = { |
||
641 | { 1, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipNetToMediaIfIndex */ |
||
642 | { 2, SNMP_ASN1_TYPE_OCTET_STRING, SNMP_VARIANT_VALUE_TYPE_PTR }, /* ipNetToMediaPhysAddress */ |
||
643 | { 3, SNMP_ASN1_TYPE_IPADDR, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipNetToMediaNetAddress */ |
||
644 | { 4, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_U32 } /* ipNetToMediaType */ |
||
645 | }; |
||
646 | |||
647 | static const struct snmp_table_simple_node ip_NetToMediaTable = SNMP_TABLE_CREATE_SIMPLE(22, ip_NetToMediaTable_columns, ip_NetToMediaTable_get_cell_value, ip_NetToMediaTable_get_next_cell_instance_and_value); |
||
648 | #endif /* LWIP_ARP && LWIP_IPV4 */ |
||
649 | |||
650 | #if LWIP_IPV4 |
||
651 | /* the following nodes access variables in LWIP stack from SNMP worker thread and must therefore be synced to LWIP (TCPIP) thread */ |
||
652 | CREATE_LWIP_SYNC_NODE( 1, ip_Forwarding) |
||
653 | CREATE_LWIP_SYNC_NODE( 2, ip_DefaultTTL) |
||
654 | CREATE_LWIP_SYNC_NODE( 3, ip_InReceives) |
||
655 | CREATE_LWIP_SYNC_NODE( 4, ip_InHdrErrors) |
||
656 | CREATE_LWIP_SYNC_NODE( 5, ip_InAddrErrors) |
||
657 | CREATE_LWIP_SYNC_NODE( 6, ip_ForwDatagrams) |
||
658 | CREATE_LWIP_SYNC_NODE( 7, ip_InUnknownProtos) |
||
659 | CREATE_LWIP_SYNC_NODE( 8, ip_InDiscards) |
||
660 | CREATE_LWIP_SYNC_NODE( 9, ip_InDelivers) |
||
661 | CREATE_LWIP_SYNC_NODE(10, ip_OutRequests) |
||
662 | CREATE_LWIP_SYNC_NODE(11, ip_OutDiscards) |
||
663 | CREATE_LWIP_SYNC_NODE(12, ip_OutNoRoutes) |
||
664 | CREATE_LWIP_SYNC_NODE(13, ip_ReasmTimeout) |
||
665 | CREATE_LWIP_SYNC_NODE(14, ip_ReasmReqds) |
||
666 | CREATE_LWIP_SYNC_NODE(15, ip_ReasmOKs) |
||
667 | CREATE_LWIP_SYNC_NODE(15, ip_ReasmFails) |
||
668 | CREATE_LWIP_SYNC_NODE(17, ip_FragOKs) |
||
669 | CREATE_LWIP_SYNC_NODE(18, ip_FragFails) |
||
670 | CREATE_LWIP_SYNC_NODE(19, ip_FragCreates) |
||
671 | CREATE_LWIP_SYNC_NODE(20, ip_AddrTable) |
||
672 | CREATE_LWIP_SYNC_NODE(21, ip_RouteTable) |
||
673 | #if LWIP_ARP |
||
674 | CREATE_LWIP_SYNC_NODE(22, ip_NetToMediaTable) |
||
675 | #endif /* LWIP_ARP */ |
||
676 | CREATE_LWIP_SYNC_NODE(23, ip_RoutingDiscards) |
||
677 | |||
678 | static const struct snmp_node *const ip_nodes[] = { |
||
679 | &SYNC_NODE_NAME(ip_Forwarding).node.node, |
||
680 | &SYNC_NODE_NAME(ip_DefaultTTL).node.node, |
||
681 | &SYNC_NODE_NAME(ip_InReceives).node.node, |
||
682 | &SYNC_NODE_NAME(ip_InHdrErrors).node.node, |
||
683 | &SYNC_NODE_NAME(ip_InAddrErrors).node.node, |
||
684 | &SYNC_NODE_NAME(ip_ForwDatagrams).node.node, |
||
685 | &SYNC_NODE_NAME(ip_InUnknownProtos).node.node, |
||
686 | &SYNC_NODE_NAME(ip_InDiscards).node.node, |
||
687 | &SYNC_NODE_NAME(ip_InDelivers).node.node, |
||
688 | &SYNC_NODE_NAME(ip_OutRequests).node.node, |
||
689 | &SYNC_NODE_NAME(ip_OutDiscards).node.node, |
||
690 | &SYNC_NODE_NAME(ip_OutNoRoutes).node.node, |
||
691 | &SYNC_NODE_NAME(ip_ReasmTimeout).node.node, |
||
692 | &SYNC_NODE_NAME(ip_ReasmReqds).node.node, |
||
693 | &SYNC_NODE_NAME(ip_ReasmOKs).node.node, |
||
694 | &SYNC_NODE_NAME(ip_ReasmFails).node.node, |
||
695 | &SYNC_NODE_NAME(ip_FragOKs).node.node, |
||
696 | &SYNC_NODE_NAME(ip_FragFails).node.node, |
||
697 | &SYNC_NODE_NAME(ip_FragCreates).node.node, |
||
698 | &SYNC_NODE_NAME(ip_AddrTable).node.node, |
||
699 | &SYNC_NODE_NAME(ip_RouteTable).node.node, |
||
700 | #if LWIP_ARP |
||
701 | &SYNC_NODE_NAME(ip_NetToMediaTable).node.node, |
||
702 | #endif /* LWIP_ARP */ |
||
703 | &SYNC_NODE_NAME(ip_RoutingDiscards).node.node |
||
704 | }; |
||
705 | |||
706 | const struct snmp_tree_node snmp_mib2_ip_root = SNMP_CREATE_TREE_NODE(4, ip_nodes); |
||
707 | #endif /* LWIP_IPV4 */ |
||
708 | |||
709 | /* --- at .1.3.6.1.2.1.3 ----------------------------------------------------- */ |
||
710 | |||
711 | #if LWIP_ARP && LWIP_IPV4 |
||
712 | /* at node table is a subset of ip_nettomedia table (same rows but less columns) */ |
||
713 | static const struct snmp_table_simple_col_def at_Table_columns[] = { |
||
714 | { 1, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_U32 }, /* atIfIndex */ |
||
715 | { 2, SNMP_ASN1_TYPE_OCTET_STRING, SNMP_VARIANT_VALUE_TYPE_PTR }, /* atPhysAddress */ |
||
716 | { 3, SNMP_ASN1_TYPE_IPADDR, SNMP_VARIANT_VALUE_TYPE_U32 } /* atNetAddress */ |
||
717 | }; |
||
718 | |||
719 | static const struct snmp_table_simple_node at_Table = SNMP_TABLE_CREATE_SIMPLE(1, at_Table_columns, ip_NetToMediaTable_get_cell_value, ip_NetToMediaTable_get_next_cell_instance_and_value); |
||
720 | |||
721 | /* the following nodes access variables in LWIP stack from SNMP worker thread and must therefore be synced to LWIP (TCPIP) thread */ |
||
722 | CREATE_LWIP_SYNC_NODE(1, at_Table) |
||
723 | |||
724 | static const struct snmp_node *const at_nodes[] = { |
||
725 | &SYNC_NODE_NAME(at_Table).node.node |
||
726 | }; |
||
727 | |||
728 | const struct snmp_tree_node snmp_mib2_at_root = SNMP_CREATE_TREE_NODE(3, at_nodes); |
||
729 | #endif /* LWIP_ARP && LWIP_IPV4 */ |
||
730 | |||
731 | #endif /* LWIP_SNMP && SNMP_LWIP_MIB2 */ |