--- libelwix/src/crc.c	2019/12/30 18:11:16	1.6
+++ libelwix/src/crc.c	2024/10/10 23:55:48	1.7
@@ -3,7 +3,7 @@
 *  by Michael Pounov <misho@openbsd-bg.org>
 *
 * $Author: misho $
-* $Id: crc.c,v 1.6 2019/12/30 18:11:16 misho Exp $
+* $Id: crc.c,v 1.7 2024/10/10 23:55:48 misho Exp $
 *
 **************************************************************************
 The ELWIX and AITNET software is distributed under the following
@@ -12,7 +12,7 @@ terms:
 All of the documentation and software included in the ELWIX and AITNET
 Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org>
 
-Copyright 2004 - 2019
+Copyright 2004 - 2024
 	by Michael Pounov <misho@elwix.org>.  All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
@@ -67,7 +67,9 @@ const crcPoly_t crc_Poly[] = {
 	{ 16, (u_int) 0x8005, "CRC-16-IBM" }, 
 	{ 24, (u_int) 0x864CFB, "CRC-24-Radix64" }, 
 	{ 30, (u_int) 0x2030B9C7, "CRC-30-CDMA" }, 
-	{ 32, (u_int) 0x04C11DB7, "CRC-32-802.3" }
+	{ 32, (u_int) 0x04C11DB7, "CRC-32-802.3" },
+	{ 16, (u_int) 0x1021, "CRC-16-CCITT" },
+	{ 16, (u_int) 0x8408, "CRC-16-XMODEM" }
 };
 
 
@@ -103,7 +105,7 @@ crcReflect(u_int crcNum, u_char crcBits)
 u_int
 crcCalc(u_char * __restrict psBuf, u_int bufLen, u_char crcBits, u_char RevOpts, u_int initCRC, u_int xorCRC)
 {
-	const u_int bits = sizeof(int) * 8 - crcBits;
+	u_int bits = sizeof(int) * 8;
 	u_int poly, crchibit, crc;
 	register u_int i, j, b, ch;
 
@@ -112,46 +114,70 @@ crcCalc(u_char * __restrict psBuf, u_int bufLen, u_cha
 	switch (crcBits) {
 		case 1:
 			poly = crc_Poly[0].poly_num;
+			bits -= crc_Poly[0].poly_bits;
 			break;
 		case 4:
 			poly = crc_Poly[1].poly_num;
+			bits -= crc_Poly[1].poly_bits;
 			break;
 		case 5:
 			poly = crc_Poly[2].poly_num;
+			bits -= crc_Poly[2].poly_bits;
 			break;
 		case 6:
 			poly = crc_Poly[3].poly_num;
+			bits -= crc_Poly[3].poly_bits;
 			break;
 		case 7:
 			poly = crc_Poly[4].poly_num;
+			bits -= crc_Poly[4].poly_bits;
 			break;
 		case 8:
 			poly = crc_Poly[5].poly_num;
+			bits -= crc_Poly[5].poly_bits;
 			break;
 		case 10:
 			poly = crc_Poly[6].poly_num;
+			bits -= crc_Poly[6].poly_bits;
 			break;
 		case 11:
 			poly = crc_Poly[7].poly_num;
+			bits -= crc_Poly[7].poly_bits;
 			break;
 		case 12:
 			poly = crc_Poly[8].poly_num;
+			bits -= crc_Poly[8].poly_bits;
 			break;
 		case 15:
 			poly = crc_Poly[9].poly_num;
+			bits -= crc_Poly[9].poly_bits;
 			break;
 		case 16:
 			poly = crc_Poly[10].poly_num;
+			bits -= crc_Poly[10].poly_bits;
 			break;
 		case 24:
 			poly = crc_Poly[11].poly_num;
+			bits -= crc_Poly[11].poly_bits;
 			break;
 		case 30:
 			poly = crc_Poly[12].poly_num;
+			bits -= crc_Poly[12].poly_bits;
 			break;
 		case 32:
 			poly = crc_Poly[13].poly_num;
+			bits -= crc_Poly[13].poly_bits;
 			break;
+		case 161:
+			poly = crc_Poly[14].poly_num;
+			bits -= crc_Poly[14].poly_bits;
+			crcBits = crc_Poly[14].poly_bits;
+			break;
+		case 162:
+			poly = crc_Poly[15].poly_num;
+			bits -= crc_Poly[15].poly_bits;
+			crcBits = crc_Poly[15].poly_bits;
+			break;
 		default:
 			elwix_SetErr(EINVAL, "crcCalc(): Unsupported CRC method!!!");
 			return -1;
@@ -190,14 +216,14 @@ crcCalc(u_char * __restrict psBuf, u_int bufLen, u_cha
 
 
 /*
- * crc16_ext() - Checksum ver.2 calculation in X/Y modem communication
+ * crc16_xy() - Checksum calculation in X/Y modem communication
  *
  * @buf = Data for calculation
  * @bufLen = Length of data
  * return: Checksum
  */
 u_short
-crc16_ext(u_char * __restrict buf, int bufLen)
+crc16_xy(u_char * __restrict buf, int bufLen)
 {
 	u_short crc, x;
 	register u_short i;
@@ -227,14 +253,14 @@ crc16_ext(u_char * __restrict buf, int bufLen)
 }
 
 /*
- * crc16() - Checksum calculation in X/Y modem communication
+ * crc16_ccitt() - Checksum calculation
  *
  * @buf = Data for calculation
  * @bufLen = Length of data
  * return: Checksum
  */
 u_short
-crc16(u_char * __restrict buf, int bufLen)
+crc16_ccitt(u_char * __restrict buf, int bufLen)
 {
 	u_short crc;
 	register u_char i;