1 | /**
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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 |
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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 |
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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 |
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47 | #if LWIP_SNMP && SNMP_LWIP_MIB2
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48 |
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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 |
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58 | #if LWIP_IPV4
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59 | /* --- ip .1.3.6.1.2.1.4 ----------------------------------------------------- */
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60 |
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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 |
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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 |
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143 | return 0;
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144 | }
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145 |
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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 |
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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 |
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186 | return ret;
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187 | }
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188 |
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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 |
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199 | /* --- ipAddrTable --- */
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200 |
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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 |
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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 |
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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 |
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247 | return SNMP_ERR_NOERROR;
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248 | }
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249 |
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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 |
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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 |
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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 |
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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 |
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272 | /* not found */
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273 | return SNMP_ERR_NOSUCHINSTANCE;
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274 | }
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275 |
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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 |
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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 |
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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 |
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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 |
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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 |
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302 | /* not found */
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303 | return SNMP_ERR_NOSUCHINSTANCE;
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304 | }
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305 |
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306 | /* --- ipRouteTable --- */
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307 |
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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 |
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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 |
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392 | return SNMP_ERR_NOERROR;
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393 | }
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394 |
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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 |
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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 |
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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 |
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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 */
|
---|
412 | return ip_RouteTable_get_cell_value_core(netif_default, 1, column, value, value_len);
|
---|
413 | }
|
---|
414 |
|
---|
415 | /* find netif with requested route */
|
---|
416 | NETIF_FOREACH(netif) {
|
---|
417 | ip4_addr_t dst;
|
---|
418 | ip4_addr_get_network(&dst, netif_ip4_addr(netif), netif_ip4_netmask(netif));
|
---|
419 |
|
---|
420 | if (ip4_addr_cmp(&dst, &test_ip)) {
|
---|
421 | /* fill in object properties */
|
---|
422 | return ip_RouteTable_get_cell_value_core(netif, 0, column, value, value_len);
|
---|
423 | }
|
---|
424 | }
|
---|
425 |
|
---|
426 | /* not found */
|
---|
427 | return SNMP_ERR_NOSUCHINSTANCE;
|
---|
428 | }
|
---|
429 |
|
---|
430 | static snmp_err_t
|
---|
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)
|
---|
432 | {
|
---|
433 | struct netif *netif;
|
---|
434 | struct snmp_next_oid_state state;
|
---|
435 | u32_t result_temp[LWIP_ARRAYSIZE(ip_RouteTable_oid_ranges)];
|
---|
436 | u32_t test_oid[LWIP_ARRAYSIZE(ip_RouteTable_oid_ranges)];
|
---|
437 |
|
---|
438 | /* init struct to search next oid */
|
---|
439 | snmp_next_oid_init(&state, row_oid->id, row_oid->len, result_temp, LWIP_ARRAYSIZE(ip_RouteTable_oid_ranges));
|
---|
440 |
|
---|
441 | /* check default route */
|
---|
442 | if (netif_default != NULL) {
|
---|
443 | snmp_ip4_to_oid(IP4_ADDR_ANY4, &test_oid[0]);
|
---|
444 | snmp_next_oid_check(&state, test_oid, LWIP_ARRAYSIZE(ip_RouteTable_oid_ranges), netif_default);
|
---|
445 | }
|
---|
446 |
|
---|
447 | /* iterate over all possible OIDs to find the next one */
|
---|
448 | NETIF_FOREACH(netif) {
|
---|
449 | ip4_addr_t dst;
|
---|
450 | ip4_addr_get_network(&dst, netif_ip4_addr(netif), netif_ip4_netmask(netif));
|
---|
451 |
|
---|
452 | /* check generated OID: is it a candidate for the next one? */
|
---|
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(size_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 | size_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 | size_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(size_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) */
|
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713 | static const struct snmp_table_simple_col_def at_Table_columns[] = {
|
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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 */
|
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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 */
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