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use std::string::FromUtf8Error;
use nix::errno::Errno;
use thiserror::Error;
use crate::sys::nlmsgerr;
#[derive(Error, Debug)]
pub enum DecodeError {
#[error("The buffer is too small to hold a valid message")]
BufTooSmall,
#[error("The message is too small")]
NlMsgTooSmall,
#[error("The message holds unexpected data")]
InvalidDataSize,
#[error("Invalid subsystem, expected NFTABLES")]
InvalidSubsystem(u8),
#[error("Invalid version, expected NFNETLINK_V0")]
InvalidVersion(u8),
#[error("Invalid port ID")]
InvalidPortId(u32),
#[error("Invalid sequence number")]
InvalidSeq(u32),
#[error("The generation number was bumped in the kernel while the operation was running, interrupting it")]
ConcurrentGenerationUpdate,
#[error("Unsupported message type")]
UnsupportedType(u16),
#[error("Invalid attribute type")]
InvalidAttributeType,
#[error("Invalid type for a chain")]
UnknownChainType,
#[error("Invalid policy for a chain")]
UnknownChainPolicy,
#[error("Unknown type for a Meta expression")]
UnknownMetaType(u32),
#[error("Unsupported value for an icmp reject type")]
UnknownRejectType(u32),
#[error("Unsupported value for an icmp code in a reject expression")]
UnknownIcmpCode(u8),
#[error("Invalid value for a register")]
UnknownRegister(u32),
#[error("Invalid type for a verdict expression")]
UnknownVerdictType(i32),
#[error("Invalid type for a nat expression")]
UnknownNatType(i32),
#[error("Invalid type for a payload expression")]
UnknownPayloadType(u32),
#[error("Invalid type for a compare expression")]
UnknownCmpOp(u32),
#[error("Invalid type for a conntrack key")]
UnknownConntrackKey(u32),
#[error("Unsupported value for a link layer header field")]
UnknownLinkLayerHeaderField(u32, u32),
#[error("Unsupported value for an IPv4 header field")]
UnknownIPv4HeaderField(u32, u32),
#[error("Unsupported value for an IPv6 header field")]
UnknownIPv6HeaderField(u32, u32),
#[error("Unsupported value for a TCP header field")]
UnknownTCPHeaderField(u32, u32),
#[error("Unsupported value for an UDP header field")]
UnknownUDPHeaderField(u32, u32),
#[error("Unsupported value for an ICMPv6 header field")]
UnknownICMPv6HeaderField(u32, u32),
#[error("Missing the 'base' attribute to deserialize the payload object")]
PayloadMissingBase,
#[error("Missing the 'offset' attribute to deserialize the payload object")]
PayloadMissingOffset,
#[error("Missing the 'len' attribute to deserialize the payload object")]
PayloadMissingLen,
#[error("The object does not contain a name for the expression being parsed")]
MissingExpressionName,
#[error("Unsupported attribute type")]
UnsupportedAttributeType(u16),
#[error("Unexpected message type")]
UnexpectedType(u16),
#[error("The decoded String is not UTF8 compliant")]
StringDecodeFailure(#[from] FromUtf8Error),
#[error("Invalid value for a protocol family")]
UnknownProtocolFamily(i32),
#[error("A custom error occured")]
Custom(Box<dyn std::error::Error + 'static>),
}
#[derive(thiserror::Error, Debug)]
pub enum BuilderError {
#[error("The length of the arguments are not compatible with each other")]
IncompatibleLength,
#[error("The table does not have a name")]
MissingTableName,
#[error("Missing information in the chain to create a rule")]
MissingChainInformationError,
#[error("Missing name for the set")]
MissingSetName,
#[error("The interface name is too long to be written")]
InterfaceNameTooLong,
#[error("The log prefix string is more than 127 characters long")]
TooLongLogPrefix,
}
#[derive(thiserror::Error, Debug)]
pub enum QueryError {
#[error("Unable to open netlink socket to netfilter")]
NetlinkOpenError(#[source] nix::Error),
#[error("Unable to send netlink command to netfilter")]
NetlinkSendError(#[source] nix::Error),
#[error("Error while reading from netlink socket")]
NetlinkRecvError(#[source] nix::Error),
#[error("Error while processing an incoming netlink message")]
ProcessNetlinkError(#[from] DecodeError),
#[error("Error while building netlink objects in Rust")]
BuilderError(#[from] BuilderError),
#[error("Error received from the kernel")]
NetlinkError(nlmsgerr),
#[error("Custom error when customizing the query")]
InitError(#[from] Box<dyn std::error::Error + Send + 'static>),
#[error("Couldn't allocate a netlink object, out of memory ?")]
NetlinkAllocationFailed,
#[error("This socket is not a netlink socket")]
NotNetlinkSocket,
#[error("Couldn't retrieve information on a socket")]
RetrievingSocketInfoFailed,
#[error("Only a part of the message was sent")]
TruncatedSend,
#[error("Got a message without the NLM_F_MULTI flag, but a maximum sequence number was not specified")]
UndecidableMessageTermination,
#[error("Couldn't close the socket")]
CloseFailed(#[source] Errno),
}
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