From b66d62c67d0c6e9c9e272002eb94f76bae347204 Mon Sep 17 00:00:00 2001
From: Ryan Thomas McBride <mcbride@cvs.openbsd.org>
Date: Sun, 6 Jun 2004 17:56:38 +0000
Subject: Multicast cleanups - make multicast ranges work - replace handrolled
 crc code with ether_crc32_{be,le}() - add missing calls to
 ether_{add,del}multi()

ok deraadt@
---
 sys/dev/usb/if_axe.c | 39 ++++++++++++---------------------------
 sys/dev/usb/if_cue.c | 39 ++++++++++++++++-----------------------
 2 files changed, 28 insertions(+), 50 deletions(-)

(limited to 'sys/dev/usb')

diff --git a/sys/dev/usb/if_axe.c b/sys/dev/usb/if_axe.c
index 9249aabaf3a..07e84ba11a4 100644
--- a/sys/dev/usb/if_axe.c
+++ b/sys/dev/usb/if_axe.c
@@ -189,7 +189,6 @@ Static void axe_ifmedia_sts(struct ifnet *, struct ifmediareq *);
 Static void axe_reset(struct axe_softc *sc);
 
 Static void axe_setmulti(struct axe_softc *);
-Static u_int32_t axe_mchash(caddr_t);
 Static void axe_lock_mii(struct axe_softc *sc);
 Static void axe_unlock_mii(struct axe_softc *sc);
 
@@ -346,29 +345,6 @@ axe_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr)
         ifmr->ifm_status = mii->mii_media_status;
 }
 
-Static u_int32_t
-axe_mchash(caddr_t addr)
-{
-	u_int32_t	crc, carry;
-	int		idx, bit;
-	u_int8_t	data;
-
-	/* Compute CRC for the address value. */
-	crc = 0xFFFFFFFF; /* initial value */
-
-	for (idx = 0; idx < 6; idx++) {
-		for (data = *addr++, bit = 0; bit < 8; bit++, data >>= 1) {
-			carry = ((crc & 0x80000000) ? 1 : 0) ^ (data & 0x01);
-			crc <<= 1;
-			if (carry)
-				crc = (crc ^ 0x04c11db6) | carry;
-		}
-	}
-
-	/* return the filter bit position */
-	return((crc >> 26) & 0x0000003F);
-}
-
 Static void
 axe_setmulti(struct axe_softc *sc)
 {
@@ -401,7 +377,7 @@ axe_setmulti(struct axe_softc *sc)
 			   ETHER_ADDR_LEN) != 0)
 			goto allmulti;
 
-		h = axe_mchash(enm->enm_addrlo);
+		h = ether_crc32_be(enm->enm_addrlo, ETHER_ADDR_LEN) >> 26;
 		hashtbl[h / 8] |= 1 << (h % 8);
 		ETHER_NEXT_MULTI(step, enm);
 	}
@@ -1256,8 +1232,17 @@ axe_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
 		break;
 	case SIOCADDMULTI:
 	case SIOCDELMULTI:
-		axe_setmulti(sc);
-		error = 0;
+		error = (cmd == SIOCADDMULTI) ?
+		    ether_addmulti(ifr, &sc->arpcom) :
+		    ether_delmulti(ifr, &sc->arpcom);
+		if (error == ENETRESET) {
+			/*
+			 * Multicast list has changed; set the hardware
+			 * filter accordingly.
+			 */
+			axe_setmulti(sc);
+			error = 0;
+		}
 		break;
 	case SIOCGIFMEDIA:
 	case SIOCSIFMEDIA:
diff --git a/sys/dev/usb/if_cue.c b/sys/dev/usb/if_cue.c
index bfefa57dbf7..39c39eb4056 100644
--- a/sys/dev/usb/if_cue.c
+++ b/sys/dev/usb/if_cue.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: if_cue.c,v 1.19 2003/12/15 23:36:14 cedric Exp $ */
+/*	$OpenBSD: if_cue.c,v 1.20 2004/06/06 17:56:37 mcbride Exp $ */
 /*	$NetBSD: if_cue.c,v 1.40 2002/07/11 21:14:26 augustss Exp $	*/
 /*
  * Copyright (c) 1997, 1998, 1999, 2000
@@ -161,7 +161,6 @@ Static void cue_stop(struct cue_softc *);
 Static void cue_watchdog(struct ifnet *);
 
 Static void cue_setmulti(struct cue_softc *);
-Static u_int32_t cue_crc(caddr_t);
 Static void cue_reset(struct cue_softc *);
 
 Static int cue_csr_read_1(struct cue_softc *, int);
@@ -359,25 +358,8 @@ cue_getmac(struct cue_softc *sc, void *buf)
 	return (0);
 }
 
-#define CUE_POLY	0xEDB88320
 #define CUE_BITS	9
 
-Static u_int32_t
-cue_crc(caddr_t addr)
-{
-	u_int32_t		idx, bit, data, crc;
-
-	/* Compute CRC for the address value. */
-	crc = 0xFFFFFFFF; /* initial value */
-
-	for (idx = 0; idx < 6; idx++) {
-		for (data = *addr++, bit = 0; bit < 8; bit++, data >>= 1)
-			crc = (crc >> 1) ^ (((crc ^ data) & 1) ? CUE_POLY : 0);
-	}
-
-	return (crc & ((1 << CUE_BITS) - 1));
-}
-
 Static void
 cue_setmulti(struct cue_softc *sc)
 {
@@ -416,7 +398,8 @@ allmulti:
 		    enm->enm_addrhi, ETHER_ADDR_LEN) != 0)
 			goto allmulti;
 
-		h = cue_crc(enm->enm_addrlo);
+		h = ether_crc32_le(enm->enm_addrlo, ETHER_ADDR_LEN) &
+		    ((1 << CUE_BITS) - 1);
 		sc->cue_mctab[h >> 3] |= 1 << (h & 0x7);
 		ETHER_NEXT_MULTI(step, enm);
 	}
@@ -428,7 +411,8 @@ allmulti:
 	 * so we can receive broadcast frames.
 	 */
 	if (ifp->if_flags & IFF_BROADCAST) {
-		h = cue_crc(etherbroadcastaddr);
+		h = ether_crc32_le(etherbroadcastaddr, ETHER_ADDR_LEN) &
+		    ((1 << CUE_BITS) - 1);
 		sc->cue_mctab[h >> 3] |= 1 << (h & 0x7);
 	}
 
@@ -1232,8 +1216,17 @@ cue_ioctl(struct ifnet *ifp, u_long command, caddr_t data)
 		break;
 	case SIOCADDMULTI:
 	case SIOCDELMULTI:
-		cue_setmulti(sc);
-		error = 0;
+		error = (command == SIOCADDMULTI) ?
+		    ether_addmulti(ifr, &sc->arpcom) :
+		    ether_delmulti(ifr, &sc->arpcom);
+		if (error == ENETRESET) {
+			/*
+			 * Multicast list has changed; set the hardware
+			 * filter accordingly.
+			 */
+			cue_setmulti(sc);
+			error = 0;
+		}
 		break;
 	default:
 		error = EINVAL;
-- 
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