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Open an SNMP session
#include <sys/types.h>
#include <snmp/asn1.h>
#include <snmp/snmp_api.h>
extern int snmp_errno;
struct snmp_session * snmp_open(
struct snmp_session * session );
- session
- A pointer to a
snmp_session
structure that defines the SNMP session that you want to open.
libsnmp
Use the -l snmp option to
qcc
to link against this library.
The snmp_open() function sets up an SNMP session with the information supplied by
the application in the
snmp_session structure
pointed to by session.
Next, snmp_open() opens and binds the necessary UDP port.
A pointer to a snmp_session structure for the created session
(which is different from the pointer passed to the function), or
NULL if an error occurs (snmp_errno is set).
If an error occurs, this function sets snmp_errno to one of:
- SNMPERR_BAD_ADDRESS
- Unknown host.
- SNMPERR_BAD_LOCPORT
- Couldn't bind to the specified port.
- SNMPERR_GENERR
- Couldn't open the socket.
SNMP
Safety: | |
Cancellation point |
Yes |
Interrupt handler |
No |
Signal handler |
No |
Thread |
No |
read_main_config_file(),
select(),
snmp_close(),
snmp_free_pdu(),
snmp_pdu,
snmp_pdu_create(),
snmp_read(),
snmp_select_info(),
snmp_send(),
snmp_session,
snmp_timeout()
Based on RFC 1157, FAQ in
Internet newsgroup comp.protocols.snmp
Marshall T. Rose, The Simple Book: An Introduction to
Internet Management, Revised 2nd ed. (Prentice-Hall,
1996, ISBN 0-13-451659-1)
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