linux-parental-controls/crates/nss/src/lib.rs

// SPDX-FileCopyrightText: 2022 Matteo Settenvini <matteo.settenvini@montecristosoftware.eu>
// SPDX-License-Identifier: EUPL-1.2

mod helpers;
mod nss_bindings;

use {
    crate::helpers::set_if_valid,
    crate::nss_bindings::{HErrno, gaih_addrtuple, nss_status},
    libc::{AF_INET, hostent, size_t, socklen_t},
    nix::errno::Errno,
    std::os::raw::{c_char, c_int, c_void},
    std::ptr,
};

// -------------- by host ---------------

#[unsafe(no_mangle)]
pub extern "C" fn _nss_parental_ctrls_gethostbyname4_r(
    _name: *const c_char,
    _pat: *mut *mut gaih_addrtuple,
    _buffer: *mut c_char,
    _buflen: size_t,
    _errnop: *mut Errno,
    _h_errnop: *mut HErrno,
    _ttlp: *mut i32,
) -> nss_status {
    todo!()
}

#[unsafe(no_mangle)]
pub extern "C" fn _nss_parental_ctrls_gethostbyname3_r(
    _name: *const c_char,
    _af: c_int,
    _host: *mut hostent,
    _buffer: *mut c_char,
    _buflen: size_t,
    _errnop: *mut Errno,
    _h_errnop: *mut HErrno,
    _ttlp: *mut i32,
    _canonp: *mut *mut char,
) -> nss_status {
    todo!()
}

#[unsafe(no_mangle)]
pub extern "C" fn _nss_parental_ctrls_gethostbyname2_r(
    name: *const c_char,
    af: c_int,
    host: *mut hostent,
    buffer: *mut c_char,
    buflen: size_t,
    errnop: *mut Errno,
    h_errnop: *mut HErrno,
) -> nss_status {
    _nss_parental_ctrls_gethostbyname3_r(
        name,
        af,
        host,
        buffer,
        buflen,
        errnop,
        h_errnop,
        ptr::null_mut(),
        ptr::null_mut(),
    )
}

#[unsafe(no_mangle)]
pub extern "C" fn _nss_parental_ctrls_gethostbyname_r(
    name: *const c_char,
    host: *mut hostent,
    buffer: *mut c_char,
    buflen: size_t,
    errnop: *mut Errno,
    h_errnop: *mut HErrno,
) -> nss_status {
    _nss_parental_ctrls_gethostbyname3_r(
        name,
        AF_INET,
        host,
        buffer,
        buflen,
        errnop,
        h_errnop,
        ptr::null_mut(),
        ptr::null_mut(),
    )
}

// ----------------- by addr -----------------

#[unsafe(no_mangle)]
pub extern "C" fn _nss_parental_ctrls_gethostbyaddr2_r(
    _addr: *const c_void,
    _len: socklen_t,
    _af: c_int,
    _host: *mut hostent,
    _buffer: *mut c_char,
    _buflen: size_t,
    errnop: *mut Errno,
    h_errnop: *mut HErrno,
    _ttlp: *mut i32,
) -> nss_status {
    set_if_valid(errnop, Errno::from_raw(0));
    set_if_valid(h_errnop, HErrno::Success);

    todo!()
}

#[unsafe(no_mangle)]
pub extern "C" fn _nss_parental_ctrls_gethostbyaddr_r(
    addr: *const c_void,
    len: socklen_t,
    af: c_int,
    host: *mut hostent,
    buffer: *mut c_char,
    buflen: size_t,
    errnop: *mut Errno,
    h_errnop: *mut HErrno,
) -> nss_status {
    _nss_parental_ctrls_gethostbyaddr2_r(
        addr,
        len,
        af,
        host,
        buffer,
        buflen,
        errnop,
        h_errnop,
        ptr::null_mut(),
    )
}