unresolved symbol when building net-snmp v3

#1 (**permalink**) 6 Days Ago

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Hi guys,

I'm trying to write a C++ application using net-snmp library. it works well with snmp version 2, but with version 3, visual studio linker reports errors.

TclSNMP error LNK2001: unresolved external symbol _usmDESPrivProtocol
TclSNMP error LNK2001: unresolved external symbol _usmHMACMD5AuthProtocol

I installed an net-snmp binary version and used netsnmp.lib found in the installation's lib directory. I also installed win32OpenSSL and tried its lib files, but it didn't work.

Anyone can help me out? Thanks a lot!

netsnmp_session* GetSnmpSession(char* address) {

map <char*, netsnmp_session*> ::iterator it = snmpSessionMap.find(address);
if (it != snmpSessionMap.end()){
return it->second;
}

netsnmp_session session, *ss;

snmp_sess_init( &session );
session.peername = address;

/*
session.version = SNMP_VERSION_2c;
char* communityName = "private";

session.community = (u_char *)communityName;
session.community_len = strlen(communityName);
*/

session.version = SNMP_VERSION_3;
session.securityLevel = SNMP_SEC_LEVEL_AUTHPRIV;
session.securityName = "regTester";
session.securityNameLen = strlen(session.securityName);
session.securityAuthProto = usmHMACMD5AuthProtocol;
session.securityAuthProtoLen = sizeof(usmHMACMD5AuthProtocol)/sizeof(oid);
session.securityPrivProto = usmDESPrivProtocol;
session.securityPrivProtoLen = sizeof(usmDESPrivProtocol)/sizeof(oid);
// session.securityAuthKey = (u_char*)"regAuthPasswd";
session.securityAuthKeyLen = USM_AUTH_KU_LEN;
//session.securityPrivKey = (u_char*)"regPrivPasswd";
//session.securityPrivKeyLen = strlen(session.securityPrivKey);

generate_Ku(session.securityAuthProto,
session.securityAuthProtoLen,
(u_char *) "regAuthPasswd", strlen("regAuthPasswd"),
session.securityAuthKey,
&session.securityAuthKeyLen);

ss = snmp_open(&session); /* establish the session */

if(ss) {
snmpSessionMap.insert(SessionPair(address, ss));
}

return ss;
}

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<html><head><style type="text/css"></style></head><body><div style="font-family:arial,helvetica,sans-serif;font-size:8pt"><div>Hi guys, I'm trying to write a C++ application using net-snmp library. it works well with snmp version 2, but with version 3, visual studio linker reports errors. TclSNMP error LNK2001: unresolved external symbol _usmDESPrivProtocol TclSNMP error LNK2001: unresolved external symbol _usmHMACMD5AuthProtocol I installed an net-snmp binary version and used netsnmp.lib found in the installation's lib directory. I also installed win32OpenSSL and tried its lib files, but it didn't work. Anyone can help me out? Thanks a lot! netsnmp_session* GetSnmpSession(char* address) {     map <char*, netsnmp_session*> ::iterator it = snmpSessionMap.find(address);   &nbsp ; if (it != snmpSessionMap.end()){    
    return it->second;     }     netsnmp_session session, *ss;     snmp_sess_init( &session );     session.peername = address; /*     session.version = SNMP_VERSION_2c;     char* communityName = "private";     session.community = (u_char *)communityName;     session.community_len = strlen(communityName); */     session.version = SNMP_VERSION_3;     session.securityLevel = SNMP_SEC_LEVEL_AUTHPRIV;     session.securityName = "regTester";     session.securityNameLen = strlen(session.securityName);   &nbsp ; session.securityAuthProto = usmHMACMD5AuthProtocol;     session.securityAuthProtoLen = sizeof(usmHMACMD5AuthProtocol)/sizeof(oid);    
session.securityPrivProto = usmDESPrivProtocol;     session.securityPrivProtoLen = sizeof(usmDESPrivProtocol)/sizeof(oid); //    session.securityAuthKey = (u_char*)"regAuthPasswd";     session.securityAuthKeyLen = USM_AUTH_KU_LEN;     //session.securityPrivKey = (u_char*)"regPrivPasswd";     //session.securityPrivKeyLen = strlen(session.securityPrivKey);  &nbs p;  generate_Ku(session.securityAuthProto,  &n bsp;                     session.securityAuthProtoLen,   &nbsp ;                    (u_char *) "regAuthPasswd", strlen("regAuthPasswd"),                       
session.securityAuthKey,                        &session.securityAuthKeyLen);  &nb sp;  ss = snmp_open(&session);    &n bsp;       &nbs p;        /* establish the session */     if(ss) {         snmpSessionMap.insert(SessionPair(address, ss));     }     return ss; } </div></div> 

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