Enum BytecodeOpCode 

pub enum BytecodeOpCode {
    Nop = 0,
    Jmp = 1,
    SportGe = 2,
    SportLe = 3,
    DportGe = 4,
    DportLe = 5,
    PortAuto = 6,
    SaddrCond = 7,
    DaddrCond = 8,
    DevCond = 9,
    MarkCond = 10,
    SportEq = 11,
    DportEq = 12,
    CgroupCond = 13,
}

Available on crate feature inet-diag only.

Enum - defines an integer enumeration, with values for each entry incrementing by 1, (e.g. 0, 1, 2, 3)

Variants

Nop = 0

Jmp = 1

unconditional jump. "no" value is ignored.

SportGe = 2

sock.sport >= next_instruction.no (big endian)

SportLe = 3

sock.sport <= next_instruction.no (big endian)

DportGe = 4

sock.dport >= next_instruction.no (big endian)

DportLe = 5

sock.dport <= next_instruction.no (big endian)

PortAuto = 6

check if sock is NOT bound to a port by user, i.e. !(sk->userlocks & SOCK_BINDPORT_LOCK)

SaddrCond = 7

Check aginst source socket addr packed as hostcond struct (hc), followed by big-endian ipv4 or ipv6 address (yes, it's that cursed).

The check equivalent to the following (in order):

no if hc.port != -1 && hc.port != sock.sport
yes if hc.family == AF_INET && sock.family == AF_INET6
    && &sock.saddr_u32[0..3] == &[0, 0, 0xffff.to_be()]
    && bits_eq(&sock.saddr_u8[12..], &hc.addr[..], hc.prefix_len)
no if hc.family != AF_UNSPEC && hc.family != family
yes if hc.prefix_len == 0
yes if bits_eq(&sock.addr[..], &hc.addr[..], hc.prefix_len)
no

See inet_diag_bc_run() in net/ipv4/inet_diag.c

DaddrCond = 8

Check aginst source socket addr using hostcond struct. Same as [saddr-cond]{.title-ref}, see its description.

DevCond = 9

socket ifindex == next_instruction (native endian u32)

MarkCond = 10

Check check socket mark bits against markcond struct (mc). The check is equivalent to: sock.mark & mc.mask == mc.mark

SportEq = 11

sock.sport == next_instruction.no (big endian)

DportEq = 12

sock.dport == next_instruction.no (big endian)

CgroupCond = 13

sock.cgroup_id == next_2_instructions (native endian u64)

Implementations

impl BytecodeOpCode

pub fn from_value(value: u64) -> Option<Self>

Trait Implementations

impl Clone for BytecodeOpCode

fn clone(&self) -> BytecodeOpCode

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for BytecodeOpCode

impl Debug for BytecodeOpCode

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.