Hi,
I have written a code to send snmp request and receive response from agent.
The program is also processing the response. For this I memcpy the response
in a buffer. I am using the following code to copy the response after
receiving it in "response" snmp_pdu variable:
for(vars=response->variables;vars;vars=vars->next_variable)
{
if(vars->type == ASN_OCTET_STR)
{
char *sp = (char*)malloc(1+vars->val_len);
memcpy(sp,vars->val.string,vars->val_len);
sp[vars->val_len] = '\0';
//process the sp buffer
}
}
The response is of 40 Bytes of ASN_OCTET_STR. The first byte of response is
always 0.
*Problem*: The problem is I am not getting anything in vars->val.string.
Though the length returned by vars->val_len is 40 and data type returned by
vars->type is ASN_OCTET_STR.
The value sent by agent is correct. I have checked it on wireshark. Even
the print_variable is printing correct value on console. But I am not able
to get this value copied in buffer.
I have also debug the code and the value in vars->val.string is zero.
Please help me in resolving this problem.
Thanks & Regards
Geet Bhatia
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