Re: unresolved symbol when building net-snmp v3

#1 (**permalink**) 5 Days Ago

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Hi,

This problem has been solved by myself, after many many desperate tries :)

so I'm not sure I can now give the exact root cause, but some notes anyway:

1) install the ssl version of net-snmp (by default, to c:\usr)
2) install Win32OpenSSL-0_9_8g.exe, which is a developer's version. (by default, to c:\OpenSSL)
3) in Visual studio, set the linker to reference c:\usr\lib\netsnmp.lib and C:\OpenSSL\lib\VC\libeay32MD.lib

Thanks All

----- Original Message ----
From: Chongkai Jiang <chongkaijiang@yahoo.com.cn>
To: net-snmp-coders@lists.sourceforge.net
Sent: Wednesday, May 7, 2008 5:34:53 PM
Subject: unresolved symbol when building net-snmp v3

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 style="font-family: arial,helvetica,sans-serif; font-size: 8pt;">Hi, This problem has been solved by myself, after many many desperate tries :) so I'm not sure I can now give the exact root cause, but some notes anyway: 1) install the ssl version of net-snmp (by default, to c:\usr) 2) install Win32OpenSSL-0_9_8g.exe, which is a developer's version. (by default, to c:\OpenSSL) 3) in Visual studio, set the linker to reference c:\usr\lib\netsnmp.lib and C:\OpenSSL\lib\VC\libeay32MD.lib Thanks All <div style="font-family: times new roman,new york,times,serif; font-size: 12pt;">----- Original Message ---- From: Chongkai Jiang <chongkaijiang@yahoo.com.cn> To: net-snmp-coders@lists.sourceforge.net Sent: Wednesday, May 7, 2008 5:34:53 PM Subject:
unresolved symbol when building net-snmp v3 <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> <hr size="1">Be a better friend, newshound, and
know-it-all with Yahoo! Mobile. <a rel="nofollow" target="_blank" href="http://us.rd.yahoo.com/evt=51733/*http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ%20"> Try it now.</a></div></div></div> 

<hr size=1>Be a better friend, newshound, and
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