Skip to content

Commit

Permalink
Added structs for crc module (Rust)
Browse files Browse the repository at this point in the history
  • Loading branch information
@lexus2k
lexus2k committed Aug 11, 2024
1 parent 54790fd commit c9102ce
Showing 1 changed file with 132 additions and 83 deletions.
215 changes: 132 additions & 83 deletions src/proto/crc/mod.rs
View file
Original file line number Diff line number Diff line change
Expand Up @@ -26,62 +26,36 @@
For further information contact via email on github account.
*/

pub mod crc8 {
pub const INITCHECKSUM8: u8 = 0x00;
pub const GOODCHECKSUM8: u8 = 0x00;

pub fn sum_byte(crc: u8, data: u8) -> u8 {
crc.wrapping_add(data)
}
pub fn sum_bytes(sum: u8, data: &[u8], len: usize) -> u8 {
let mut crc: u8 = sum;
for i in 0..len {
crc = crc.wrapping_add(data[i]);
}
0xff - crc
}
}

pub mod crc16 {
static FCSTAB_16:[u16; 256] = [
0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf, 0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5,
0xe97e, 0xf8f7, 0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e, 0x9cc9, 0x8d40, 0xbfdb, 0xae52,
0xdaed, 0xcb64, 0xf9ff, 0xe876, 0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd, 0xad4a, 0xbcc3,
0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5, 0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c,
0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974, 0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9,
0x2732, 0x36bb, 0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3, 0x5285, 0x430c, 0x7197, 0x601e,
0x14a1, 0x0528, 0x37b3, 0x263a, 0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72, 0x6306, 0x728f,
0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9, 0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1,
0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738, 0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862,
0x9af9, 0x8b70, 0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7, 0x0840, 0x19c9, 0x2b52, 0x3adb,
0x4e64, 0x5fed, 0x6d76, 0x7cff, 0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036, 0x18c1, 0x0948,
0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e, 0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5,
0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd, 0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226,
0xd0bd, 0xc134, 0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c, 0xc60c, 0xd785, 0xe51e, 0xf497,
0x8028, 0x91a1, 0xa33a, 0xb2b3, 0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb, 0xd68d, 0xc704,
0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232, 0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a,
0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1, 0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb,
0x0e70, 0x1ff9, 0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330, 0x7bc7, 0x6a4e, 0x58d5, 0x495c,
0x3de3, 0x2c6a, 0x1ef1, 0x0f78];

pub const PPPINITFCS16: u16 = 0xffff;
pub const PPPGOODFCS16: u16 = 0xf0b8;

pub fn sum_byte(crc: u16, data: u8) -> u16 {
(crc >> 8) ^ FCSTAB_16[((crc as u8 ^ (data)) & 0xff) as usize]
}

pub fn sum_bytes(sum: u16, data: &[u8], len: usize) -> u16 {
let mut crc: u16 = sum;
for i in 0..len {
crc = (crc >> 8) ^ FCSTAB_16[((crc as u8 ^ (data[i])) & 0xff) as usize];
}
crc ^ 0xffff
}
}

pub mod crc32 {
static FCSTAB_32:[u32; 256] = [
const INITCHECKSUM8: u8 = 0x00;
const GOODCHECKSUM8: u8 = 0x00;
const PPPINITFCS16: u16 = 0xffff;
const PPPGOODFCS16: u16 = 0xf0b8 ^ 0xffff;
const PPPINITFCS32: u32 = 0xffffffff;
const PPPGOODFCS32: u32 = 0xdebb20e3 ^ 0xffffffff;


static FCSTAB_16:[u16; 256] = [
0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf, 0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5,
0xe97e, 0xf8f7, 0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e, 0x9cc9, 0x8d40, 0xbfdb, 0xae52,
0xdaed, 0xcb64, 0xf9ff, 0xe876, 0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd, 0xad4a, 0xbcc3,
0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5, 0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c,
0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974, 0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9,
0x2732, 0x36bb, 0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3, 0x5285, 0x430c, 0x7197, 0x601e,
0x14a1, 0x0528, 0x37b3, 0x263a, 0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72, 0x6306, 0x728f,
0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9, 0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1,
0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738, 0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862,
0x9af9, 0x8b70, 0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7, 0x0840, 0x19c9, 0x2b52, 0x3adb,
0x4e64, 0x5fed, 0x6d76, 0x7cff, 0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036, 0x18c1, 0x0948,
0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e, 0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5,
0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd, 0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226,
0xd0bd, 0xc134, 0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c, 0xc60c, 0xd785, 0xe51e, 0xf497,
0x8028, 0x91a1, 0xa33a, 0xb2b3, 0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb, 0xd68d, 0xc704,
0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232, 0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a,
0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1, 0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb,
0x0e70, 0x1ff9, 0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330, 0x7bc7, 0x6a4e, 0x58d5, 0x495c,
0x3de3, 0x2c6a, 0x1ef1, 0x0f78];

static FCSTAB_32:[u32; 256] = [
0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832,
0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2,
0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856, 0x646ba8c0, 0xfd62f97a,
Expand Down Expand Up @@ -112,22 +86,95 @@ pub mod crc32 {
0x24b4a3a6, 0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d];

pub const PPPINITFCS32: u32 = 0xffffffff;
pub const PPPGOODFCS32: u32 = 0xdebb20e3;

pub fn sum_byte(sum: u32, data: u8) -> u32 {
FCSTAB_32[((sum as u8 ^ data) & 0xFF) as usize] ^ (sum >> 8)
pub struct Crc8 {
crc: u8,
}

pub struct Crc16 {
crc: u16,
}

pub struct Crc32 {
crc: u32,
}

impl Crc8 {
pub fn new() -> Self {
Crc8 { crc: INITCHECKSUM8 }
}

pub fn sum_bytes(sum: u32, data: &[u8], len: usize) -> u32 {
let mut temp: u32 = sum;
pub fn reset(&mut self) {
self.crc = INITCHECKSUM8;
}

pub fn sum_byte(&mut self, data: u8) {
self.crc = self.crc.wrapping_add(data);
}

pub fn sum_bytes(&mut self, data: &[u8], len: usize) {
for i in 0..len {
temp = FCSTAB_32[((temp as u8 ^ data[i]) & 0xFF) as usize] ^ (temp >> 8);
self.crc = self.crc.wrapping_add(data[i]);
}
temp ^ 0xffffffff
}

pub fn get(&self) -> u8 {
0xff - self.crc
}
}


impl Crc16 {

pub fn new() -> Self {
Crc16 { crc: PPPINITFCS16 }
}

pub fn reset(&mut self) {
self.crc = PPPINITFCS16;
}

pub fn sum_byte(&mut self, data: u8) {
self.crc = (self.crc >> 8) ^ FCSTAB_16[((self.crc as u8 ^ data) & 0xff) as usize];
}

pub fn sum_bytes(&mut self, data: &[u8], len: usize) {
for i in 0..len {
self.crc = (self.crc >> 8) ^ FCSTAB_16[((self.crc as u8 ^ data[i]) & 0xff) as usize];
}
}

pub fn get(&self) -> u16 {
self.crc ^ 0xffff
}
}

impl Crc32 {

pub fn new() -> Self {
Crc32 { crc: PPPINITFCS32 }
}

pub fn reset(&mut self) {
self.crc = PPPINITFCS32;
}

pub fn sum_byte(&mut self, data: u8) {
self.crc = FCSTAB_32[((self.crc as u8 ^ data) & 0xFF) as usize] ^ (self.crc >> 8);
}

pub fn sum_bytes(&mut self, data: &[u8], len: usize) {
for i in 0..len {
self.crc = FCSTAB_32[((self.crc as u8 ^ data[i]) & 0xFF) as usize] ^ (self.crc >> 8);
}
}

pub fn get(&self) -> u32 {
self.crc ^ 0xffffffff
}
}

#[derive(Clone, Copy)]
pub enum HdlcCrcT {
///< If default is specified HDLC will auto select CRC option
HdlcCrcDefault,
Expand Down Expand Up @@ -162,16 +209,16 @@ mod unittest {
for i in 0..buf.len() {
buf[i] = i as u8;
}
let crc32_num: u32 = crc32::sum_bytes(crc32::PPPINITFCS32, &buf, buf.len());
assert_eq!(crc32_num, 0x29058c73);
let mut crc = Crc32::new();
crc.sum_bytes(&buf, buf.len());
assert_eq!(crc.get(), 0x29058c73);
// use network bytes order for hdlc protocol, that's why we unpack to le bytes
let crc32_swap: [u8; 4] = (crc32_num).to_le_bytes();
assert_eq!(crc32::sum_bytes(crc32_num ^ 0xffffffff, &crc32_swap, crc32_swap.len()) ^ 0xffffffff, crc32::PPPGOODFCS32);
assert_eq!(crc32::sum_byte(crc32::sum_byte(crc32::sum_byte(
crc32::sum_byte(crc32_num ^ 0xffffffff, (crc32_num & 0xff) as u8),
((crc32_num >> 8) & 0xff) as u8),
((crc32_num >> 16) & 0xff) as u8),
((crc32_num >> 24) & 0xff) as u8), crc32::PPPGOODFCS32);
let crc32_swap: [u8; 4] = (crc.get()).to_le_bytes();
crc.sum_byte(crc32_swap[0]);
crc.sum_byte(crc32_swap[1]);
crc.sum_byte(crc32_swap[2]);
crc.sum_byte(crc32_swap[3]);
assert_eq!(crc.get(), PPPGOODFCS32);
}

#[test]
Expand All @@ -180,13 +227,14 @@ mod unittest {
for i in 0..buf.len() {
buf[i] = i as u8;
}
let crc16_num: u16 = crc16::sum_bytes(crc16::PPPINITFCS16, &buf, buf.len());
assert_eq!(crc16_num, 0x303c);
let mut crc = Crc16::new();
crc.sum_bytes(&buf, buf.len());
assert_eq!(crc.get(), 0x303c);
// use network bytes order for hdlc protocol, that's why we unpack to le bytes
let crc16_swap: [u8; 2] = (crc16_num).to_le_bytes();
assert_eq!(crc16::sum_bytes(crc16_num ^ 0xffff, &crc16_swap, crc16_swap.len()) ^ 0xffff, crc16::PPPGOODFCS16);
assert_eq!(crc16::sum_byte(crc16::sum_byte(crc16_num ^ 0xffff, (crc16_num & 0xff) as u8),
((crc16_num >> 8) & 0xff) as u8), crc16::PPPGOODFCS16);
let crc16_swap: [u8; 2] = (crc.get()).to_le_bytes();
crc.sum_byte(crc16_swap[0]);
crc.sum_byte(crc16_swap[1]);
assert_eq!(crc.get(), PPPGOODFCS16);
}

#[test]
Expand All @@ -195,9 +243,10 @@ mod unittest {
for i in 0..buf.len() {
buf[i] = i as u8;
}
let crc8_num: u8 = crc8::sum_bytes(crc8::INITCHECKSUM8, &buf, buf.len());
assert_eq!(crc8_num, 0x7f);
assert_eq!(crc8::sum_bytes(0xff - crc8_num, &crc8_num.to_le_bytes(), 1), crc8::GOODCHECKSUM8);
assert_eq!(0xff - crc8::sum_byte(0xff - crc8_num, crc8_num), crc8::GOODCHECKSUM8);
let mut crc = Crc8::new();
crc.sum_bytes(&buf, buf.len());
assert_eq!(crc.get(), 0x7f);
crc.sum_byte(crc.get());
assert_eq!(crc.get(), GOODCHECKSUM8);
}
}

0 comments on commit c9102ce

Please sign in to comment.