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//! Constants for netfilter related protocols
//!
//! Note that this doesn't cover everything yet, both the list of
//! types and variants in enums will be added over time.

use crate as neli;

use neli_proc_macros::neli_enum;

/// Attributes inside a netfilter log packet message.
///
/// These are send by the kernel and describe a logged packet.
#[neli_enum(serialized_type = "u16")]
pub enum NfLogAttr {
    PacketHdr = libc::NFULA_PACKET_HDR as u16,
    Mark = libc::NFULA_MARK as u16,
    Timestamp = libc::NFULA_TIMESTAMP as u16,
    IfindexIndev = libc::NFULA_IFINDEX_INDEV as u16,
    IfindexOutdev = libc::NFULA_IFINDEX_OUTDEV as u16,
    IfindexPhyindev = libc::NFULA_IFINDEX_PHYSINDEV as u16,
    IfindexPhyoutdev = libc::NFULA_IFINDEX_PHYSOUTDEV as u16,
    Hwaddr = libc::NFULA_HWADDR as u16,
    Payload = libc::NFULA_PAYLOAD as u16,
    Prefix = libc::NFULA_PREFIX as u16,
    Uid = libc::NFULA_UID as u16,
    Seq = libc::NFULA_SEQ as u16,
    SeqGlobal = libc::NFULA_SEQ_GLOBAL as u16,
    Gid = libc::NFULA_GID as u16,
    Hwtype = libc::NFULA_HWTYPE as u16,
    Hwheader = libc::NFULA_HWHEADER as u16,
    Hwlen = libc::NFULA_HWLEN as u16,
    Ct = libc::NFULA_CT as u16,
    CtInfo = libc::NFULA_CT_INFO as u16,
}

/// Configuration attributes for netfilter logging.
#[neli_enum(serialized_type = "u16")]
pub enum NfLogCfg {
    Cmd = libc::NFULA_CFG_CMD as u16,
    Mode = libc::NFULA_CFG_MODE as u16,
    NlBufSize = libc::NFULA_CFG_NLBUFSIZ as u16,
    Timeout = libc::NFULA_CFG_TIMEOUT as u16,
    QThresh = libc::NFULA_CFG_QTHRESH as u16,
    Flags = libc::NFULA_CFG_FLAGS as u16,
}

const fn nfnl_msg_type(subsys: u8, msg: u8) -> u16 {
    ((subsys as u16) << 8) | (msg as u16)
}

/// Messages related to the netfilter netlink protocols.
///
/// These appear on the
/// [`NlFamily::Netfilter`][crate::consts::socket::NlFamily::Netfilter]
/// sockets.
#[neli_enum(serialized_type = "u16")]
pub enum NetfilterMsg {
    // TODO: Docs here /// A logged packet, going from kernel to userspace.
    LogPacket = nfnl_msg_type(libc::NFNL_SUBSYS_ULOG as u8, libc::NFULNL_MSG_PACKET as u8),
    // TODO: Docs here /// A logging configuration request, going from userspace to kernel.
    LogConfig = nfnl_msg_type(libc::NFNL_SUBSYS_ULOG as u8, libc::NFULNL_MSG_CONFIG as u8),
}

impl_trait! {
    /// Parameters for the [`NfLogCfg::Cmd`].
    pub LogCfgCmd, u8,
    /// Wrapper that is valid anywhere that accepts a value
    /// implementing the [`LogCfgCmd`] trait
    pub LogCfgCmdWrapper,
    LogCmd
}

/// Command value for the [`NfLogCfg::Cmd`].
#[neli_enum(serialized_type = "u8")]
pub enum LogCmd {
    Bind = libc::NFULNL_CFG_CMD_BIND as u8,
    Unbind = libc::NFULNL_CFG_CMD_UNBIND as u8,
    PfBind = libc::NFULNL_CFG_CMD_PF_BIND as u8,
    PfUnbind = libc::NFULNL_CFG_CMD_PF_UNBIND as u8,
}

/// Copy mode of the logged packets.
#[neli_enum(serialized_type = "u8")]
pub enum LogCopyMode {
    None = libc::NFULNL_COPY_NONE as u8,
    Meta = libc::NFULNL_COPY_META as u8,
    Packet = libc::NFULNL_COPY_PACKET as u8,
}