Protocol Support

Protocol support for net-snmp agent for SNMP support. More...

Collaboration diagram for Protocol Support:

Functions
int	agentx_parse (netsnmp_session *session, netsnmp_pdu *pdu, u_char *data, size_t len)
	Utility functions for parsing an AgentX packet. More...
int	agentx_realloc_build (netsnmp_session *session, netsnmp_pdu *pdu, u_char **buf, size_t *buf_len, size_t *out_len)
	Realloc an AgentX PDU. More...
int	agentx_check_packet (u_char *packet, size_t packet_len)
	Check the packet. More...

Detailed Description

Protocol support for net-snmp agent for SNMP support.

Requires WITH_SNMP=1 in build and –with-snmp=true CLI parameter at runtime.

Function Documentation

agentx_check_packet()

int agentx_check_packet	(	u_char *	packet,
		size_t	packet_len
	)

Check the packet.

Only present if WITH_SNMP=1.

     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |   h.version   |    h.type     |    h.flags    |  <reserved>   |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |                          h.sessionID                          |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |                        h.transactionID                        |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |                          h.packetID                           |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |                        h.payload_length                       |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     20 bytes in header

Parameters

packet	the packet to check
packet_len	length of packet to check

Returns

the proper length of an incoming agentx packet.

agentx_parse()

int agentx_parse	(	netsnmp_session *	session,
		netsnmp_pdu *	pdu,
		u_char *	data,
		size_t	len
	)

Utility functions for parsing an AgentX packet.

Only present if WITH_SNMP=1.

Parameters

session	The net-snmp session
pdu	The snmp pdu information
data	The snmp pdu data information
len	length of request

Returns

1 on success, 0 on error

agentx_realloc_build()

int agentx_realloc_build	(	netsnmp_session *	session,
		netsnmp_pdu *	pdu,
		u_char **	buf,
		size_t *	buf_len,
		size_t *	out_len
	)

Realloc an AgentX PDU.

Only present if WITH_SNMP=1.

Parameters

	session	The net-snmp session
	pdu	The snmp pdu information
[out]	buf	address of return buffer *buf has allocated buffer
[out]	buf_len	address of return buffer length *buf_len has length of *buf
[out]	out_len	address of output length *out_len has output length

Returns

1 on success, 0 on error