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use crate::snmp::*;
use crate::snmpv3::*;
use der_parser::ber::BerTag;
use der_parser::der::*;
use nom::{Err,ErrorKind,IResult};
use std::str;
#[derive(Debug,PartialEq)]
pub enum SnmpGenericMessage<'a> {
V1(SnmpMessage<'a>),
V2(SnmpMessage<'a>),
V3(SnmpV3Message<'a>),
}
pub fn parse_snmp_generic_message<'a>(i:&'a[u8]) -> IResult<&'a[u8],SnmpGenericMessage> {
der_read_element_header(i).and_then(|(rem,hdr)| {
if hdr.tag != BerTag::Sequence { return Err(Err::Error(error_position!(i, ErrorKind::Tag))); }
take!(rem, hdr.len as usize)
}).and_then(|(rem,data)| {
parse_der_u32(data).and_then(|(r,version)| {
match version {
0 => {
do_parse!(
r,
community: map_res!(parse_der_octetstring_as_slice, str::from_utf8) >>
pdu: parse_snmp_v1_pdu >>
(
SnmpGenericMessage::V1(SnmpMessage{
version,
community: community.to_string(),
pdu
})
)
)
}
1 => {
do_parse!(
r,
community: map_res!(parse_der_octetstring_as_slice, str::from_utf8) >>
pdu: parse_snmp_v2c_pdu >>
(
SnmpGenericMessage::V2(SnmpMessage{
version,
community: community.to_string(),
pdu
})
)
)
}
3 => {
do_parse!(
r,
hdr: parse_snmp_v3_headerdata >>
secp: map_res!(parse_der_octetstring, |x: DerObject<'a>| parse_secp(&x,&hdr)) >>
data: apply!(parse_snmp_v3_data,&hdr) >>
(
SnmpGenericMessage::V3(SnmpV3Message{
version,
header_data: hdr,
security_params: secp,
data
})
)
)
},
_ => { return Err(Err::Error(error_position!(i, ErrorKind::Tag))); }
}
}).map(|(_,res)| (rem,res))
})
}