98 lines
3.0 KiB
Rust
98 lines
3.0 KiB
Rust
//! Compare libc's CMSG(3) family of functions against the actual C macros, for
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//! various inputs.
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extern crate libc;
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#[cfg(unix)]
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mod t {
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use libc::{self, c_uchar, c_uint, c_void, cmsghdr, msghdr};
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use std::mem;
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extern "C" {
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pub fn cmsg_firsthdr(msgh: *const msghdr) -> *mut cmsghdr;
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pub fn cmsg_nxthdr(mhdr: *const msghdr, cmsg: *const cmsghdr) -> *mut cmsghdr;
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pub fn cmsg_space(length: c_uint) -> usize;
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pub fn cmsg_len(length: c_uint) -> usize;
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pub fn cmsg_data(cmsg: *const cmsghdr) -> *mut c_uchar;
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}
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#[test]
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fn test_cmsg_data() {
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for l in 0..128 {
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let pcmsghdr = l as *const cmsghdr;
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unsafe {
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assert_eq!(libc::CMSG_DATA(pcmsghdr), cmsg_data(pcmsghdr));
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}
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}
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}
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#[test]
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fn test_cmsg_firsthdr() {
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let mut mhdr: msghdr = unsafe { mem::zeroed() };
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mhdr.msg_control = 0xdeadbeef as *mut c_void;
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let pmhdr = &mhdr as *const msghdr;
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for l in 0..128 {
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mhdr.msg_controllen = l;
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unsafe {
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assert_eq!(libc::CMSG_FIRSTHDR(pmhdr), cmsg_firsthdr(pmhdr));
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}
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}
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}
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#[test]
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fn test_cmsg_len() {
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for l in 0..128 {
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unsafe {
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assert_eq!(libc::CMSG_LEN(l) as usize, cmsg_len(l));
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}
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}
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}
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// Skip on sparc64
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// https://github.com/rust-lang/libc/issues/1239
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#[cfg(not(target_arch = "sparc64"))]
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#[test]
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fn test_cmsg_nxthdr() {
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use std::ptr;
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let mut buffer = [0u8; 256];
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let mut mhdr: msghdr = unsafe { mem::zeroed() };
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let pmhdr = &mhdr as *const msghdr;
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for start_ofs in 0..64 {
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let pcmsghdr = &mut buffer[start_ofs] as *mut u8 as *mut cmsghdr;
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mhdr.msg_control = pcmsghdr as *mut c_void;
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mhdr.msg_controllen = (160 - start_ofs) as _;
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for cmsg_len in 0..64 {
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for next_cmsg_len in 0..32 {
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for i in buffer[start_ofs..].iter_mut() {
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*i = 0;
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}
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unsafe {
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(*pcmsghdr).cmsg_len = cmsg_len;
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let libc_next = libc::CMSG_NXTHDR(pmhdr, pcmsghdr);
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let next = cmsg_nxthdr(pmhdr, pcmsghdr);
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assert_eq!(libc_next, next);
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if libc_next != ptr::null_mut() {
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(*libc_next).cmsg_len = next_cmsg_len;
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let libc_next = libc::CMSG_NXTHDR(pmhdr, pcmsghdr);
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let next = cmsg_nxthdr(pmhdr, pcmsghdr);
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assert_eq!(libc_next, next);
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}
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}
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}
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}
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}
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}
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#[test]
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fn test_cmsg_space() {
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unsafe {
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for l in 0..128 {
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assert_eq!(libc::CMSG_SPACE(l) as usize, cmsg_space(l));
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}
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}
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}
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}
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