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51ea0904 CT |
1 | /* |
2 | * $Id$ | |
3 | * | |
4 | * DEBUG: section 49 SNMP Interface | |
5 | * | |
6 | */ | |
7 | ||
8 | #include "config.h" | |
9 | #include "base/TextException.h" | |
10 | #include "ipc/TypedMsgHdr.h" | |
11 | #include "protos.h" | |
12 | #include "snmp_core.h" | |
13 | #include "snmpx/Pdu.h" | |
14 | #include "snmpx/Var.h" | |
15 | ||
16 | ||
17 | Snmp::Pdu::Pdu() | |
18 | { | |
19 | init(); | |
20 | } | |
21 | ||
22 | Snmp::Pdu::Pdu(const Pdu& pdu) | |
23 | { | |
24 | init(); | |
25 | assign(pdu); | |
26 | } | |
27 | ||
28 | Snmp::Pdu::~Pdu() | |
29 | { | |
30 | clear(); | |
31 | } | |
32 | ||
33 | Snmp::Pdu& | |
34 | Snmp::Pdu::operator = (const Pdu& pdu) | |
35 | { | |
36 | clear(); | |
37 | assign(pdu); | |
38 | return *this; | |
39 | } | |
40 | ||
41 | void | |
42 | Snmp::Pdu::init() | |
43 | { | |
44 | xmemset(this, 0, sizeof(*this)); | |
45 | errstat = SNMP_DEFAULT_ERRSTAT; | |
46 | errindex = SNMP_DEFAULT_ERRINDEX; | |
47 | } | |
48 | ||
49 | void | |
50 | Snmp::Pdu::aggregate(const Pdu& pdu) | |
51 | { | |
52 | Must(varCount() == pdu.varCount()); | |
e26257b2 | 53 | aggrCount++; |
51ea0904 CT |
54 | for (variable_list* p_aggr = variables, *p_var = pdu.variables; p_var != NULL; |
55 | p_aggr = p_aggr->next_variable, p_var = p_var->next_variable) | |
56 | { | |
57 | Must(p_aggr != NULL); | |
58 | Var& aggr = static_cast<Var&>(*p_aggr); | |
59 | Var& var = static_cast<Var&>(*p_var); | |
60 | if (aggr.isNull()) { | |
61 | aggr.setName(var.getName()); | |
62 | aggr.copyValue(var); | |
63 | } else { | |
64 | switch(snmpAggrType(aggr.name, aggr.name_length)) | |
65 | { | |
66 | case atSum: | |
67 | case atAverage: | |
68 | aggr += var; | |
69 | break; | |
70 | case atMax: | |
71 | if (var > aggr) | |
72 | aggr.copyValue(var); | |
73 | break; | |
74 | case atMin: | |
75 | if (var < aggr) | |
76 | aggr.copyValue(var); | |
77 | break; | |
78 | default: | |
79 | break; | |
80 | } | |
81 | } | |
82 | } | |
83 | } | |
84 | ||
85 | void | |
86 | Snmp::Pdu::clear() | |
87 | { | |
88 | clearSystemOid(); | |
89 | clearVars(); | |
90 | init(); | |
91 | } | |
92 | ||
93 | void | |
94 | Snmp::Pdu::assign(const Pdu& pdu) | |
95 | { | |
96 | command = pdu.command; | |
97 | address.sin_addr.s_addr = pdu.address.sin_addr.s_addr; | |
98 | reqid = pdu.reqid; | |
99 | errstat = pdu.errstat; | |
100 | errindex = pdu.errindex; | |
101 | non_repeaters = pdu.non_repeaters; | |
102 | max_repetitions = pdu.max_repetitions; | |
103 | agent_addr.sin_addr.s_addr = pdu.agent_addr.sin_addr.s_addr; | |
104 | trap_type = pdu.trap_type; | |
105 | specific_type = pdu.specific_type; | |
106 | time = pdu.time; | |
e26257b2 | 107 | aggrCount = pdu.aggrCount; |
51ea0904 CT |
108 | setSystemOid(pdu.getSystemOid()); |
109 | setVars(pdu.variables); | |
110 | } | |
111 | ||
112 | void | |
113 | Snmp::Pdu::clearVars() | |
114 | { | |
115 | variable_list* var = variables; | |
116 | while (var != NULL) { | |
117 | variable_list* tmp = var; | |
118 | var = var->next_variable; | |
119 | snmp_var_free(tmp); | |
120 | } | |
121 | variables = NULL; | |
122 | } | |
123 | ||
124 | void | |
125 | Snmp::Pdu::setVars(variable_list* vars) | |
126 | { | |
127 | clearVars(); | |
128 | for (variable_list** p_var = &variables; vars != NULL; | |
129 | vars = vars->next_variable, p_var = &(*p_var)->next_variable) | |
130 | { | |
131 | *p_var = new Var(static_cast<Var&>(*vars)); | |
132 | } | |
133 | } | |
134 | ||
135 | void | |
136 | Snmp::Pdu::clearSystemOid() | |
137 | { | |
138 | if (enterprise != NULL) { | |
139 | xfree(enterprise); | |
140 | enterprise = NULL; | |
141 | } | |
142 | enterprise_length = 0; | |
143 | } | |
144 | ||
145 | Range<const oid*> | |
146 | Snmp::Pdu::getSystemOid() const | |
147 | { | |
148 | return Range<const oid*>(enterprise, enterprise + enterprise_length); | |
149 | } | |
150 | ||
151 | void | |
152 | Snmp::Pdu::setSystemOid(const Range<const oid*>& systemOid) | |
153 | { | |
154 | clearSystemOid(); | |
155 | if (systemOid.start != NULL && systemOid.size() != 0) { | |
156 | enterprise_length = systemOid.size(); | |
157 | enterprise = static_cast<oid*>(xmalloc(enterprise_length * sizeof(oid))); | |
158 | std::copy(systemOid.start, systemOid.end, enterprise); | |
159 | } | |
160 | } | |
161 | ||
162 | void | |
163 | Snmp::Pdu::pack(Ipc::TypedMsgHdr& msg) const | |
164 | { | |
165 | msg.putPod(command); | |
166 | msg.putPod(address); | |
167 | msg.putPod(reqid); | |
168 | msg.putPod(errstat); | |
169 | msg.putPod(errindex); | |
170 | msg.putPod(non_repeaters); | |
171 | msg.putPod(max_repetitions); | |
172 | msg.putInt(enterprise_length); | |
173 | if (enterprise_length > 0) { | |
174 | Must(enterprise != NULL); | |
175 | msg.putFixed(enterprise, enterprise_length * sizeof(oid)); | |
176 | } | |
177 | msg.putPod(agent_addr); | |
178 | msg.putPod(trap_type); | |
179 | msg.putPod(specific_type); | |
180 | msg.putPod(time); | |
181 | msg.putInt(varCount()); | |
182 | for (variable_list* var = variables; var != NULL; var = var->next_variable) | |
183 | static_cast<Var*>(var)->pack(msg); | |
184 | } | |
185 | ||
186 | void | |
187 | Snmp::Pdu::unpack(const Ipc::TypedMsgHdr& msg) | |
188 | { | |
189 | clear(); | |
190 | msg.getPod(command); | |
191 | msg.getPod(address); | |
192 | msg.getPod(reqid); | |
193 | msg.getPod(errstat); | |
194 | msg.getPod(errindex); | |
195 | msg.getPod(non_repeaters); | |
196 | msg.getPod(max_repetitions); | |
197 | enterprise_length = msg.getInt(); | |
198 | if (enterprise_length > 0) { | |
199 | enterprise = static_cast<oid*>(xmalloc(enterprise_length * sizeof(oid))); | |
200 | msg.getFixed(enterprise, enterprise_length * sizeof(oid)); | |
201 | } | |
202 | msg.getPod(agent_addr); | |
203 | msg.getPod(trap_type); | |
204 | msg.getPod(specific_type); | |
205 | msg.getPod(time); | |
206 | int count = msg.getInt(); | |
207 | for (variable_list** p_var = &variables; count > 0; | |
208 | p_var = &(*p_var)->next_variable, --count) | |
209 | { | |
210 | Var* var = new Var(); | |
211 | var->unpack(msg); | |
212 | *p_var = var; | |
213 | } | |
214 | } | |
215 | ||
216 | int | |
217 | Snmp::Pdu::varCount() const | |
218 | { | |
219 | int count = 0; | |
220 | for (variable_list* var = variables; var != NULL; var = var->next_variable) | |
221 | ++count; | |
222 | return count; | |
223 | } | |
e26257b2 CT |
224 | |
225 | void | |
226 | Snmp::Pdu::fixAggregate() | |
227 | { | |
228 | if (!aggrCount) | |
229 | return; | |
230 | for (variable_list* p_aggr = variables; p_aggr != NULL; p_aggr = p_aggr->next_variable) { | |
231 | Var& aggr = static_cast<Var&>(*p_aggr); | |
232 | if(snmpAggrType(aggr.name, aggr.name_length) == atAverage) { | |
233 | aggr /= aggrCount; | |
234 | } | |
235 | } | |
236 | aggrCount = 0; | |
237 | } |