SNMP Subagent Programmer's Guide

Programming Tutorials
SNMP Subagent Programmer’s Guide—119728 2-89
Security Checker
/*
* Set up the management environment. We'll talk to the local
* agent, registering ourselves as 1.3.6.1.4.1.442.2.1
* with no password.
*/
if ((mgmt_env = mgmt_init_env(argv[1], <--
5
(ObjId_t *) &GI_hello,
"Hello World Example with security",
(Octets_t *) NULL,
(void_function) NULL)) == NULL)
{
(void) fputs(argv[0], stderr);
(void) fputs(": mgmt_init_env failure\n", stderr);
return(2);
}
/*
* Let the agent know information what we're responsible for.
*/
if ((mgmt_hello_handle = mgmt_new_instance(mgmt_env, <--
6
&SMI_GROUP_hello,
(void *)NULL)) == NULL)
{
(void) fputs(argv[0], stderr);
(void) fputs(": mgmt_new_instance failure\n", stderr);
mgmt_term_env(mgmt_env);
mgmt_env = NULL;
return(2);
}
/* allocate an IO buffer: */
if (mgmt_env->sess->agent_msg_buffer == NULL)
{
mgmt_env->sess->agent_msg_buffer = (char *) malloc(SNMP_MSG_MAX);
}
#pragma page
/* main loop */
while (!time_to_die)
{
agent_fileno = mgmt_read_nowait((struct mgmt_env *)mgmt_env,NULL); <--
7
if (agent_fileno == -1)
{
(void) fprintf(stderr, "%s: error from mgmt_read_nowait\n",
argv[0]);
break;
}
Example 2-18. Security Checker Main Program (page 3 of 5)