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[src/trunk]: src/sys/netinet Remove unused checksum code.
details: https://anonhg.NetBSD.org/src/rev/8d6821fad35f
branches: trunk
changeset: 458863:8d6821fad35f
user: rjs <rjs%NetBSD.org@localhost>
date: Tue Aug 13 19:55:40 2019 +0000
description:
Remove unused checksum code.
diffstat:
sys/netinet/sctp_crc32.c | 7 +-
sys/netinet/sctp_crc32.h | 4 +-
sys/netinet/sctputil.c | 122 +---------------------------------------------
3 files changed, 7 insertions(+), 126 deletions(-)
diffs (241 lines):
diff -r 44c43485a5d9 -r 8d6821fad35f sys/netinet/sctp_crc32.c
--- a/sys/netinet/sctp_crc32.c Tue Aug 13 17:57:49 2019 +0000
+++ b/sys/netinet/sctp_crc32.c Tue Aug 13 19:55:40 2019 +0000
@@ -1,5 +1,5 @@
/* $KAME: sctp_crc32.c,v 1.12 2005/03/06 16:04:17 itojun Exp $ */
-/* $NetBSD: sctp_crc32.c,v 1.2 2016/08/12 19:08:54 jdolecek Exp $ */
+/* $NetBSD: sctp_crc32.c,v 1.3 2019/08/13 19:55:40 rjs Exp $ */
/*
* Copyright (c) 2001, 2002, 2003, 2004 Cisco Systems, Inc.
@@ -34,7 +34,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: sctp_crc32.c,v 1.2 2016/08/12 19:08:54 jdolecek Exp $");
+__KERNEL_RCSID(0, "$NetBSD: sctp_crc32.c,v 1.3 2019/08/13 19:55:40 rjs Exp $");
#ifdef _KERNEL_OPT
#include "opt_sctp.h"
@@ -43,8 +43,6 @@
#include <sys/param.h>
#include <netinet/sctp_crc32.h>
-#ifndef SCTP_USE_ADLER32
-
#define SCTP_CRC32C_POLY 0x1EDC6F41
#define SCTP_CRC32C(c, d) (c = ((c) >> 8) ^ sctp_crc_c[((c) ^ (d)) & 0xFF])
@@ -181,4 +179,3 @@
return (crc32c);
}
-#endif
diff -r 44c43485a5d9 -r 8d6821fad35f sys/netinet/sctp_crc32.h
--- a/sys/netinet/sctp_crc32.h Tue Aug 13 17:57:49 2019 +0000
+++ b/sys/netinet/sctp_crc32.h Tue Aug 13 19:55:40 2019 +0000
@@ -1,5 +1,5 @@
/* $KAME: sctp_crc32.h,v 1.5 2004/08/17 04:06:16 itojun Exp $ */
-/* $NetBSD: sctp_crc32.h,v 1.1 2015/10/13 21:28:35 rjs Exp $ */
+/* $NetBSD: sctp_crc32.h,v 1.2 2019/08/13 19:55:40 rjs Exp $ */
#ifndef __SCTP_CRC32C_H__
#define __SCTP_CRC32C_H__
@@ -38,12 +38,10 @@
#include <sys/types.h>
-#ifndef SCTP_USE_ADLER32
#if defined(_KERNEL)
u_int32_t update_crc32(u_int32_t, unsigned char *, unsigned int);
u_int32_t sctp_csum_finalize(u_int32_t);
#endif /* _KERNEL */
-#endif /* !SCTP_USE_ADLER32 */
#endif /* __SCTP_CRC32C_H__ */
diff -r 44c43485a5d9 -r 8d6821fad35f sys/netinet/sctputil.c
--- a/sys/netinet/sctputil.c Tue Aug 13 17:57:49 2019 +0000
+++ b/sys/netinet/sctputil.c Tue Aug 13 19:55:40 2019 +0000
@@ -1,5 +1,5 @@
/* $KAME: sctputil.c,v 1.39 2005/06/16 20:54:06 jinmei Exp $ */
-/* $NetBSD: sctputil.c,v 1.14 2018/11/08 06:34:40 msaitoh Exp $ */
+/* $NetBSD: sctputil.c,v 1.15 2019/08/13 19:55:40 rjs Exp $ */
/*
* Copyright (c) 2001, 2002, 2003, 2004 Cisco Systems, Inc.
@@ -34,7 +34,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: sctputil.c,v 1.14 2018/11/08 06:34:40 msaitoh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: sctputil.c,v 1.15 2019/08/13 19:55:40 rjs Exp $");
#ifdef _KERNEL_OPT
#include "opt_inet.h"
@@ -1572,47 +1572,6 @@
return (0);
}
-#ifdef SCTP_USE_ADLER32
-static uint32_t
-update_adler32(uint32_t adler, uint8_t *buf, int32_t len)
-{
- u_int32_t s1 = adler & 0xffff;
- u_int32_t s2 = (adler >> 16) & 0xffff;
- int n;
-
- for (n = 0; n < len; n++, buf++) {
- /* s1 = (s1 + buf[n]) % BASE */
- /* first we add */
- s1 = (s1 + *buf);
- /*
- * now if we need to, we do a mod by subtracting. It seems
- * a bit faster since I really will only ever do one subtract
- * at the MOST, since buf[n] is a max of 255.
- */
- if (s1 >= SCTP_ADLER32_BASE) {
- s1 -= SCTP_ADLER32_BASE;
- }
- /* s2 = (s2 + s1) % BASE */
- /* first we add */
- s2 = (s2 + s1);
- /*
- * again, it is more efficent (it seems) to subtract since
- * the most s2 will ever be is (BASE-1 + BASE-1) in the worse
- * case. This would then be (2 * BASE) - 2, which will still
- * only do one subtract. On Intel this is much better to do
- * this way and avoid the divide. Have not -pg'd on sparc.
- */
- if (s2 >= SCTP_ADLER32_BASE) {
- s2 -= SCTP_ADLER32_BASE;
- }
- }
- /* Return the adler32 of the bytes buf[0..len-1] */
- return ((s2 << 16) + s1);
-}
-
-#endif
-
-
u_int32_t
sctp_calculate_len(struct mbuf *m)
{
@@ -1626,31 +1585,6 @@
return (tlen);
}
-#if defined(SCTP_WITH_NO_CSUM)
-
-uint32_t
-sctp_calculate_sum(struct mbuf *m, int32_t *pktlen, uint32_t offset)
-{
- /*
- * given a mbuf chain with a packetheader offset by 'offset'
- * pointing at a sctphdr (with csum set to 0) go through
- * the chain of m_next's and calculate the SCTP checksum.
- * This is currently Adler32 but will change to CRC32x
- * soon. Also has a side bonus calculate the total length
- * of the mbuf chain.
- * Note: if offset is greater than the total mbuf length,
- * checksum=1, pktlen=0 is returned (ie. no real error code)
- */
- if (pktlen == NULL)
- return (0);
- *pktlen = sctp_calculate_len(m);
- return (0);
-}
-
-#elif defined(SCTP_USE_INCHKSUM)
-
-#include <machine/in_cksum.h>
-
uint32_t
sctp_calculate_sum(struct mbuf *m, int32_t *pktlen, uint32_t offset)
{
@@ -1658,49 +1592,14 @@
* given a mbuf chain with a packetheader offset by 'offset'
* pointing at a sctphdr (with csum set to 0) go through
* the chain of m_next's and calculate the SCTP checksum.
- * This is currently Adler32 but will change to CRC32x
- * soon. Also has a side bonus calculate the total length
+ * This is CRC32c.
+ * Also has a side bonus calculate the total length
* of the mbuf chain.
* Note: if offset is greater than the total mbuf length,
* checksum=1, pktlen=0 is returned (ie. no real error code)
*/
int32_t tlen=0;
- struct mbuf *at;
- uint32_t the_sum, retsum;
-
- at = m;
- while (at) {
- tlen += at->m_len;
- at = at->m_next;
- }
- the_sum = (uint32_t)(in_cksum_skip(m, tlen, offset));
- if (pktlen != NULL)
- *pktlen = (tlen-offset);
- retsum = htons(the_sum);
- return (the_sum);
-}
-
-#else
-
-uint32_t
-sctp_calculate_sum(struct mbuf *m, int32_t *pktlen, uint32_t offset)
-{
- /*
- * given a mbuf chain with a packetheader offset by 'offset'
- * pointing at a sctphdr (with csum set to 0) go through
- * the chain of m_next's and calculate the SCTP checksum.
- * This is currently Adler32 but will change to CRC32x
- * soon. Also has a side bonus calculate the total length
- * of the mbuf chain.
- * Note: if offset is greater than the total mbuf length,
- * checksum=1, pktlen=0 is returned (ie. no real error code)
- */
- int32_t tlen=0;
-#ifdef SCTP_USE_ADLER32
- uint32_t base = 1L;
-#else
uint32_t base = 0xffffffff;
-#endif /* SCTP_USE_ADLER32 */
struct mbuf *at;
at = m;
/* find the correct mbuf and offset into mbuf */
@@ -1710,13 +1609,8 @@
}
while (at != NULL) {
-#ifdef SCTP_USE_ADLER32
- base = update_adler32(base, at->m_data + offset,
- at->m_len - offset);
-#else
base = update_crc32(base, at->m_data + offset,
at->m_len - offset);
-#endif /* SCTP_USE_ADLER32 */
tlen += at->m_len - offset;
/* we only offset once into the first mbuf */
if (offset) {
@@ -1727,19 +1621,11 @@
if (pktlen != NULL) {
*pktlen = tlen;
}
-#ifdef SCTP_USE_ADLER32
- /* Adler32 */
- base = htonl(base);
-#else
/* CRC-32c */
base = sctp_csum_finalize(base);
-#endif
return (base);
}
-
-#endif
-
void
sctp_mtu_size_reset(struct sctp_inpcb *inp,
struct sctp_association *asoc, u_long mtu)
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