diff options
Diffstat (limited to 'cpukit/libnetworking/net/if_ethersubr.c')
| -rw-r--r-- | cpukit/libnetworking/net/if_ethersubr.c | 899 |
1 files changed, 899 insertions, 0 deletions
diff --git a/cpukit/libnetworking/net/if_ethersubr.c b/cpukit/libnetworking/net/if_ethersubr.c new file mode 100644 index 0000000000..b60684fa6e --- /dev/null +++ b/cpukit/libnetworking/net/if_ethersubr.c @@ -0,0 +1,899 @@ +/* + * Copyright (c) 1982, 1989, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)if_ethersubr.c 8.1 (Berkeley) 6/10/93 + * $FreeBSD: src/sys/net/if_ethersubr.c,v 1.189 2005/03/06 22:59:40 sobomax Exp $ + */ + +/* + * $Id$ + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include "opt_atalk.h" +#include "opt_inet.h" +#include "opt_inet6.h" +#include "opt_ipx.h" +#include "opt_bdg.h" +#include "opt_mac.h" +#include "opt_netgraph.h" + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/kernel.h> +#include <sys/malloc.h> +#include <sys/mbuf.h> +#include <sys/protosw.h> +#include <sys/socket.h> +#include <sys/ioctl.h> +#include <errno.h> +#include <sys/syslog.h> +#include <sys/sysctl.h> + +#include <net/if.h> +#include <net/if_arp.h> +#include <net/netisr.h> +#include <net/route.h> +#include <net/if_llc.h> +#include <net/if_dl.h> +#include <net/if_types.h> +#include <net/ethernet.h> + +#if defined(INET) || defined(INET6) +#include <netinet/in.h> +#include <netinet/in_var.h> +#include <netinet/if_ether.h> +#include <netinet/ip_fw.h> +#ifndef __rtems__ +#include <netinet/ip_dummynet.h> +#endif +#endif +#ifdef INET6 +#include <netinet6/nd6.h> +#endif + +#ifdef DEV_CARP +#include <netinet/ip_carp.h> +#endif + +#ifdef IPX +#include <netipx/ipx.h> +#include <netipx/ipx_if.h> +#endif + +#ifdef NETATALK +#include <netatalk/at.h> +#include <netatalk/at_var.h> +#include <netatalk/at_extern.h> + +#define llc_snap_org_code llc_un.type_snap.org_code +#define llc_snap_ether_type llc_un.type_snap.ether_type + +extern u_char at_org_code[3]; +extern u_char aarp_org_code[3]; +#endif /* NETATALK */ + +u_char etherbroadcastaddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; +#define senderr(e) do { error = (e); goto bad;} while (0) + +/* + * Ethernet output routine. + * Encapsulate a packet of type family for the local net. + * Use trailer local net encapsulation if enough data in first + * packet leaves a multiple of 512 bytes of data in remainder. + * Assumes that ifp is actually pointer to arpcom structure. + */ +int +ether_output(struct ifnet *ifp, struct mbuf *m, + struct sockaddr *dst, struct rtentry *rt0) +{ + short type; + int s, error = 0; + u_char edst[6]; + register struct rtentry *rt; + struct mbuf *mcopy = (struct mbuf *)0; + register struct ether_header *eh; + int off, len = m->m_pkthdr.len; + struct arpcom *ac = (struct arpcom *)ifp; +#ifdef NETATALK + struct at_ifaddr *aa; +#endif /* NETATALK */ + int hlen; /* link layer header length */ + + if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) + senderr(ENETDOWN); + rt = rt0; + if (rt) { + if ((rt->rt_flags & RTF_UP) == 0) { + rt0 = rt = rtalloc1(dst, 1, 0UL); + if (rt0) + rt->rt_refcnt--; + else + senderr(EHOSTUNREACH); + } + if (rt->rt_flags & RTF_GATEWAY) { + if (rt->rt_gwroute == 0) + goto lookup; + if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == 0) { + rtfree(rt); rt = rt0; + lookup: rt->rt_gwroute = rtalloc1(rt->rt_gateway, 1, + 0UL); + if ((rt = rt->rt_gwroute) == 0) + senderr(EHOSTUNREACH); + } + } + if (rt->rt_flags & RTF_REJECT) + if (rt->rt_rmx.rmx_expire == 0 || + rtems_bsdnet_seconds_since_boot() < rt->rt_rmx.rmx_expire) + senderr(rt == rt0 ? EHOSTDOWN : EHOSTUNREACH); + } + hlen = ETHER_HDR_LEN; + switch (dst->sa_family) { + +#ifdef INET + case AF_INET: + if (!arpresolve(ac, rt, m, dst, edst, rt0)) + return (0); /* if not yet resolved */ + /* If broadcasting on a simplex interface, loopback a copy */ + if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) + mcopy = m_copy(m, 0, (int)M_COPYALL); + off = m->m_pkthdr.len - m->m_len; + type = htons(ETHERTYPE_IP); + break; +#endif +#ifdef IPX + case AF_IPX: + { + struct ifaddr *ia; + + type = htons(ETHERTYPE_IPX); + bcopy((caddr_t)&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host), + (caddr_t)edst, sizeof (edst)); + for (ia = ifp->if_addrlist; ia != NULL; ia = ia->ifa_next) + if(ia->ifa_addr->sa_family == AF_IPX && + !bcmp((caddr_t)edst, + (caddr_t)&((struct ipx_ifaddr *)ia)->ia_addr.sipx_addr.x_host, + sizeof(edst))) + return (looutput(ifp, m, dst, rt)); + /* If broadcasting on a simplex interface, loopback a copy */ + if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) + mcopy = m_copy(m, 0, (int)M_COPYALL); + break; + } +#endif +#ifdef NETATALK + case AF_APPLETALK: + { + struct sockaddr_at *sat = (struct sockaddr_at *)dst; + + /* + * super hack.. + * Most of this loopback code should move into the appletalk + * code, but it's here for now.. remember to move it! [JRE] + * This may not get the same interface we started with + * fix asap. XXX + */ + aa = at_ifawithnet( sat ); + if (aa == NULL) { + goto bad; + } + if( aa->aa_ifa.ifa_ifp != ifp ) { + (*aa->aa_ifa.ifa_ifp->if_output)(aa->aa_ifa.ifa_ifp, + m,dst,rt); + } + if (((sat->sat_addr.s_net == ATADDR_ANYNET) + && (sat->sat_addr.s_node == ATADDR_ANYNODE)) + || ((sat->sat_addr.s_net == aa->aa_addr.sat_addr.s_net ) + && (sat->sat_addr.s_node == aa->aa_addr.sat_addr.s_node))) { + (void) looutput(ifp, m, dst, rt); + return(0); + } + + if (!aarpresolve(ac, m, (struct sockaddr_at *)dst, edst)) { +#ifdef NETATALKDEBUG + extern char *prsockaddr(struct sockaddr *); + printf("aarpresolv: failed for %s\n", prsockaddr(dst)); +#endif /* NETATALKDEBUG */ + return (0); + } + + /* + * If broadcasting on a simplex interface, loopback a copy + */ + if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) + mcopy = m_copy(m, 0, (int)M_COPYALL); + } + /* + * In the phase 2 case, we need to prepend an mbuf for the llc header. + * Since we must preserve the value of m, which is passed to us by + * value, we m_copy() the first mbuf, and use it for our llc header. + */ + if ( aa->aa_flags & AFA_PHASE2 ) { + struct llc llc; + + M_PREPEND(m, sizeof(struct llc), M_WAIT); + len += sizeof(struct llc); + llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; + llc.llc_control = LLC_UI; + bcopy(at_org_code, llc.llc_snap_org_code, sizeof(at_org_code)); + llc.llc_snap_ether_type = htons( ETHERTYPE_AT ); + bcopy(&llc, mtod(m, caddr_t), sizeof(struct llc)); + type = htons(m->m_pkthdr.len); + } else { + type = htons(ETHERTYPE_AT); + } + break; +#endif /* NETATALK */ + + case AF_UNSPEC: + eh = (struct ether_header *)dst->sa_data; + (void)memcpy(edst, eh->ether_dhost, sizeof (edst)); + type = eh->ether_type; + break; + + default: + printf("%s%d: can't handle af%d\n", ifp->if_name, ifp->if_unit, + dst->sa_family); + senderr(EAFNOSUPPORT); + } + + + if (mcopy) + (void) looutput(ifp, mcopy, dst, rt); + /* + * Add local net header. If no space in first mbuf, + * allocate another. + */ + M_PREPEND(m, sizeof (struct ether_header), M_DONTWAIT); + if (m == NULL) + senderr(ENOBUFS); + eh = mtod(m, struct ether_header *); + (void)memcpy(&eh->ether_type, &type, + sizeof(eh->ether_type)); + (void)memcpy(eh->ether_dhost, edst, sizeof (edst)); + (void)memcpy(eh->ether_shost, ac->ac_enaddr, + sizeof(eh->ether_shost)); + s = splimp(); + /* + * Queue message on interface, and start output if interface + * not yet active. + */ + if (IF_QFULL(&ifp->if_snd)) { + IF_DROP(&ifp->if_snd); + splx(s); + senderr(ENOBUFS); + } + IF_ENQUEUE(&ifp->if_snd, m); + if ((ifp->if_flags & IFF_OACTIVE) == 0) + (*ifp->if_start)(ifp); + splx(s); + ifp->if_obytes += len + sizeof (struct ether_header); + if (m->m_flags & M_MCAST) + ifp->if_omcasts++; + return (error); + +bad: + if (m) + m_freem(m); + return (error); +} + +/* + * Process a received Ethernet packet; + * the packet is in the mbuf chain m without + * the ether header, which is provided separately. + */ +void +ether_input(struct ifnet *ifp, struct ether_header *eh, struct mbuf *m) +{ + register struct ifqueue *inq; + u_short ether_type; + int s; +#if defined(NETATALK) + struct llc *l; +#endif + + if ((ifp->if_flags & IFF_UP) == 0) { + m_freem(m); + return; + } + ifp->if_ibytes += m->m_pkthdr.len + sizeof (*eh); + if (bcmp((caddr_t)etherbroadcastaddr, (caddr_t)eh->ether_dhost, + sizeof(etherbroadcastaddr)) == 0) + m->m_flags |= M_BCAST; + else if (eh->ether_dhost[0] & 1) + m->m_flags |= M_MCAST; + if (m->m_flags & (M_BCAST|M_MCAST)) + ifp->if_imcasts++; + + /* + * RTEMS addition -- allow application to `tap into' + * the incoming packet stream. + */ + if (ifp->if_tap && (*ifp->if_tap)(ifp, eh, m)) { + m_freem(m); + return; + } + + ether_type = ntohs(eh->ether_type); + + switch (ether_type) { +#ifdef INET + case ETHERTYPE_IP: + schednetisr(NETISR_IP); + inq = &ipintrq; + break; + + case ETHERTYPE_ARP: + schednetisr(NETISR_ARP); + inq = &arpintrq; + break; +#endif +#ifdef IPX + case ETHERTYPE_IPX: + schednetisr(NETISR_IPX); + inq = &ipxintrq; + break; +#endif +#ifdef NETATALK + case ETHERTYPE_AT: + schednetisr(NETISR_ATALK); + inq = &atintrq1; + break; + case ETHERTYPE_AARP: + /* probably this should be done with a NETISR as well */ + aarpinput((struct arpcom *)ifp, m); /* XXX */ + return; +#endif /* NETATALK */ + default: +#if defined (ISO) || defined (LLC) || defined(NETATALK) + if (ether_type > ETHERMTU) + goto dropanyway; + l = mtod(m, struct llc *); + switch (l->llc_dsap) { +#ifdef NETATALK + case LLC_SNAP_LSAP: + switch (l->llc_control) { + case LLC_UI: + if (l->llc_ssap != LLC_SNAP_LSAP) + goto dropanyway; + + if (Bcmp(&(l->llc_snap_org_code)[0], at_org_code, + sizeof(at_org_code)) == 0 && + ntohs(l->llc_snap_ether_type) == ETHERTYPE_AT) { + inq = &atintrq2; + m_adj( m, sizeof( struct llc )); + schednetisr(NETISR_ATALK); + break; + } + + if (Bcmp(&(l->llc_snap_org_code)[0], aarp_org_code, + sizeof(aarp_org_code)) == 0 && + ntohs(l->llc_snap_ether_type) == ETHERTYPE_AARP) { + m_adj( m, sizeof( struct llc )); + aarpinput((struct arpcom *)ifp, m); /* XXX */ + return; + } + + default: + goto dropanyway; + } + break; +#endif /* NETATALK */ +#ifdef ISO + case LLC_ISO_LSAP: + switch (l->llc_control) { + case LLC_UI: + /* LLC_UI_P forbidden in class 1 service */ + if ((l->llc_dsap == LLC_ISO_LSAP) && + (l->llc_ssap == LLC_ISO_LSAP)) { + /* LSAP for ISO */ + if (m->m_pkthdr.len > ether_type) + m_adj(m, ether_type - m->m_pkthdr.len); + m->m_data += 3; /* XXX */ + m->m_len -= 3; /* XXX */ + m->m_pkthdr.len -= 3; /* XXX */ + M_PREPEND(m, sizeof *eh, M_DONTWAIT); + if (m == 0) + return; + *mtod(m, struct ether_header *) = *eh; + IFDEBUG(D_ETHER) + printf("clnp packet"); + ENDDEBUG + schednetisr(NETISR_ISO); + inq = &clnlintrq; + break; + } + goto dropanyway; + + case LLC_XID: + case LLC_XID_P: + if(m->m_len < 6) + goto dropanyway; + l->llc_window = 0; + l->llc_fid = 9; + l->llc_class = 1; + l->llc_dsap = l->llc_ssap = 0; + /* Fall through to */ + case LLC_TEST: + case LLC_TEST_P: + { + struct sockaddr sa; + register struct ether_header *eh2; + int i; + u_char c = l->llc_dsap; + + l->llc_dsap = l->llc_ssap; + l->llc_ssap = c; + if (m->m_flags & (M_BCAST | M_MCAST)) + bcopy((caddr_t)ac->ac_enaddr, + (caddr_t)eh->ether_dhost, 6); + sa.sa_family = AF_UNSPEC; + sa.sa_len = sizeof(sa); + eh2 = (struct ether_header *)sa.sa_data; + for (i = 0; i < 6; i++) { + eh2->ether_shost[i] = c = eh->ether_dhost[i]; + eh2->ether_dhost[i] = + eh->ether_dhost[i] = eh->ether_shost[i]; + eh->ether_shost[i] = c; + } + ifp->if_output(ifp, m, &sa, NULL); + return; + } + default: + m_freem(m); + return; + } + break; +#endif /* ISO */ +#ifdef LLC + case LLC_X25_LSAP: + { + if (m->m_pkthdr.len > ether_type) + m_adj(m, ether_type - m->m_pkthdr.len); + M_PREPEND(m, sizeof(struct sdl_hdr) , M_DONTWAIT); + if (m == 0) + return; + if ( !sdl_sethdrif(ifp, eh->ether_shost, LLC_X25_LSAP, + eh->ether_dhost, LLC_X25_LSAP, 6, + mtod(m, struct sdl_hdr *))) + panic("ETHER cons addr failure"); + mtod(m, struct sdl_hdr *)->sdlhdr_len = ether_type; +#ifdef LLC_DEBUG + printf("llc packet\n"); +#endif /* LLC_DEBUG */ + schednetisr(NETISR_CCITT); + inq = &llcintrq; + break; + } +#endif /* LLC */ + dropanyway: + default: + m_freem(m); + return; + } +#else /* ISO || LLC || NETATALK */ + m_freem(m); + return; +#endif /* ISO || LLC || NETATALK */ + } + + s = splimp(); + if (IF_QFULL(inq)) { + IF_DROP(inq); + m_freem(m); + } else + IF_ENQUEUE(inq, m); + splx(s); +} + +/* + * Convert Ethernet address to printable (loggable) representation. + * The static buffer isn't a really huge problem since this code + * is protected by the RTEMS network mutex. + */ +char * +ether_sprintf(const u_char *ap) +{ + static char buf[32]; + char *b = buf; + int i; + + for (i = 0; i < ETHER_ADDR_LEN; i++, b+=3) + sprintf(b, "%02x:", *ap++); + *--b = '\0'; + return buf; +} + +/* + * Perform common duties while attaching to interface list + */ +void +ether_ifattach(struct ifnet *ifp) +{ + struct ifaddr *ifa; + struct sockaddr_dl *sdl; + + ifp->if_type = IFT_ETHER; + ifp->if_addrlen = ETHER_ADDR_LEN; + ifp->if_hdrlen = ETHER_HDR_LEN; + ifp->if_mtu = ETHERMTU; + if (ifp->if_baudrate == 0) + ifp->if_baudrate = 10000000; + for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next) + if ((sdl = (struct sockaddr_dl *)ifa->ifa_addr) && + sdl->sdl_family == AF_LINK) { + sdl->sdl_type = IFT_ETHER; + sdl->sdl_alen = ifp->if_addrlen; + bcopy((caddr_t)((struct arpcom *)ifp)->ac_enaddr, + LLADDR(sdl), ifp->if_addrlen); + break; + } +} + +#if defined(__rtems__) +u_char ether_ipmulticast_min[6] = + { 0x01, 0x00, 0x5e, 0x00, 0x00, 0x00 }; +u_char ether_ipmulticast_max[6] = + { 0x01, 0x00, 0x5e, 0x7f, 0xff, 0xff }; +#else +static u_char ether_ipmulticast_min[6] = + { 0x01, 0x00, 0x5e, 0x00, 0x00, 0x00 }; +static u_char ether_ipmulticast_max[6] = + { 0x01, 0x00, 0x5e, 0x7f, 0xff, 0xff }; +#endif + +/* + * Add an Ethernet multicast address or range of addresses to the list for a + * given interface. + */ +int +ether_addmulti(struct ifreq *ifr, struct arpcom *ac) +{ + register struct ether_multi *enm; + struct sockaddr_in *sin; + u_char addrlo[6]; + u_char addrhi[6]; + int set_allmulti = 0; + int s = splimp(); + + switch (ifr->ifr_addr.sa_family) { + + case AF_UNSPEC: + bcopy(ifr->ifr_addr.sa_data, addrlo, 6); + bcopy(addrlo, addrhi, 6); + break; + +#ifdef INET + case AF_INET: + sin = (struct sockaddr_in *)&(ifr->ifr_addr); + if (sin->sin_addr.s_addr == INADDR_ANY) { + /* + * An IP address of INADDR_ANY means listen to all + * of the Ethernet multicast addresses used for IP. + * (This is for the sake of IP multicast routers.) + */ + bcopy(ether_ipmulticast_min, addrlo, 6); + bcopy(ether_ipmulticast_max, addrhi, 6); + set_allmulti = 1; + } + else { + ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo); + bcopy(addrlo, addrhi, 6); + } + break; +#endif + + default: + splx(s); + return (EAFNOSUPPORT); + } + + /* + * Verify that we have valid Ethernet multicast addresses. + */ + if ((addrlo[0] & 0x01) != 1 || (addrhi[0] & 0x01) != 1) { + splx(s); + return (EINVAL); + } + /* + * See if the address range is already in the list. + */ + ETHER_LOOKUP_MULTI(addrlo, addrhi, ac, enm); + if (enm != NULL) { + /* + * Found it; just increment the reference count. + */ + ++enm->enm_refcount; + splx(s); + return (0); + } + /* + * New address or range; malloc a new multicast record + * and link it into the interface's multicast list. + */ + enm = (struct ether_multi *)malloc(sizeof(*enm), M_IFMADDR, M_NOWAIT); + if (enm == NULL) { + splx(s); + return (ENOBUFS); + } + bcopy(addrlo, enm->enm_addrlo, 6); + bcopy(addrhi, enm->enm_addrhi, 6); + enm->enm_ac = ac; + enm->enm_refcount = 1; + enm->enm_next = ac->ac_multiaddrs; + ac->ac_multiaddrs = enm; + ac->ac_multicnt++; + splx(s); + if (set_allmulti) + ac->ac_if.if_flags |= IFF_ALLMULTI; + + /* + * Return ENETRESET to inform the driver that the list has changed + * and its reception filter should be adjusted accordingly. + */ + return (ENETRESET); +} + +/* + * Delete a multicast address record. + */ +int +ether_delmulti(struct ifreq *ifr, struct arpcom *ac) +{ + register struct ether_multi *enm; + register struct ether_multi **p; + struct sockaddr_in *sin; + u_char addrlo[6]; + u_char addrhi[6]; + int unset_allmulti = 0; + int s = splimp(); + + switch (ifr->ifr_addr.sa_family) { + + case AF_UNSPEC: + bcopy(ifr->ifr_addr.sa_data, addrlo, 6); + bcopy(addrlo, addrhi, 6); + break; + +#ifdef INET + case AF_INET: + sin = (struct sockaddr_in *)&(ifr->ifr_addr); + if (sin->sin_addr.s_addr == INADDR_ANY) { + /* + * An IP address of INADDR_ANY means stop listening + * to the range of Ethernet multicast addresses used + * for IP. + */ + bcopy(ether_ipmulticast_min, addrlo, 6); + bcopy(ether_ipmulticast_max, addrhi, 6); + unset_allmulti = 1; + } + else { + ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo); + bcopy(addrlo, addrhi, 6); + } + break; +#endif + + default: + splx(s); + return (EAFNOSUPPORT); + } + + /* + * Look up the address in our list. + */ + ETHER_LOOKUP_MULTI(addrlo, addrhi, ac, enm); + if (enm == NULL) { + splx(s); + return (ENXIO); + } + if (--enm->enm_refcount != 0) { + /* + * Still some claims to this record. + */ + splx(s); + return (0); + } + /* + * No remaining claims to this record; unlink and free it. + */ + for (p = &enm->enm_ac->ac_multiaddrs; + *p != enm; + p = &(*p)->enm_next) + continue; + *p = (*p)->enm_next; + free(enm, M_IFMADDR); + ac->ac_multicnt--; + splx(s); + if (unset_allmulti) + ac->ac_if.if_flags &= ~IFF_ALLMULTI; + + /* + * Return ENETRESET to inform the driver that the list has changed + * and its reception filter should be adjusted accordingly. + */ + return (ENETRESET); +} + +SYSCTL_DECL(_net_link); +SYSCTL_NODE(_net_link, IFT_ETHER, ether, CTLFLAG_RW, 0, "Ethernet"); + +#if 0 +/* + * This is for reference. We have a table-driven version + * of the little-endian crc32 generator, which is faster + * than the double-loop. + */ +uint32_t +ether_crc32_le(const uint8_t *buf, size_t len) +{ + size_t i; + uint32_t crc; + int bit; + uint8_t data; + + crc = 0xffffffff; /* initial value */ + + for (i = 0; i < len; i++) { + for (data = *buf++, bit = 0; bit < 8; bit++, data >>= 1) + carry = (crc ^ data) & 1; + crc >>= 1; + if (carry) + crc = (crc ^ ETHER_CRC_POLY_LE); + } + + return (crc); +} +#else +uint32_t +ether_crc32_le(const uint8_t *buf, size_t len) +{ + static const uint32_t crctab[] = { + 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, + 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, + 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, + 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c + }; + size_t i; + uint32_t crc; + + crc = 0xffffffff; /* initial value */ + + for (i = 0; i < len; i++) { + crc ^= buf[i]; + crc = (crc >> 4) ^ crctab[crc & 0xf]; + crc = (crc >> 4) ^ crctab[crc & 0xf]; + } + + return (crc); +} +#endif + +uint32_t +ether_crc32_be(const uint8_t *buf, size_t len) +{ + size_t i; + uint32_t crc, carry; + int bit; + uint8_t data; + + crc = 0xffffffff; /* initial value */ + + for (i = 0; i < len; i++) { + for (data = *buf++, bit = 0; bit < 8; bit++, data >>= 1) { + carry = ((crc & 0x80000000) ? 1 : 0) ^ (data & 0x01); + crc <<= 1; + if (carry) + crc = (crc ^ ETHER_CRC_POLY_BE) | carry; + } + } + + return (crc); +} + +int +ether_ioctl(struct ifnet *ifp, ioctl_command_t command, caddr_t data) +{ + struct ifaddr *ifa = (struct ifaddr *) data; + struct ifreq *ifr = (struct ifreq *) data; + int error = 0; + + switch (command) { + case SIOCSIFADDR: + ifp->if_flags |= IFF_UP; + + switch (ifa->ifa_addr->sa_family) { +#ifdef INET + case AF_INET: + ifp->if_init(ifp->if_softc); /* before arpwhohas */ + arp_ifinit((struct arpcom *)ifp, ifa); + break; +#endif +#ifdef IPX + /* + * XXX - This code is probably wrong + */ + case AF_IPX: + { + struct ipx_addr *ina = &(IA_SIPX(ifa)->sipx_addr); + struct arpcom *ac = (struct arpcom *) (ifp->if_softc); + + if (ipx_nullhost(*ina)) + ina->x_host = + *(union ipx_host *) + ac->ac_enaddr; + else { + bcopy((caddr_t) ina->x_host.c_host, + (caddr_t) ac->ac_enaddr, + sizeof(ac->ac_enaddr)); + } + + /* + * Set new address + */ + ifp->if_init(ifp->if_softc); + break; + } +#endif + default: + ifp->if_init(ifp->if_softc); + break; + } + break; + + case SIOCGIFADDR: + { + struct sockaddr *sa; + + sa = (struct sockaddr *) & ifr->ifr_data; + bcopy(((struct arpcom *)ifp->if_softc)->ac_enaddr, + (caddr_t) sa->sa_data, ETHER_ADDR_LEN); + } + break; + + case SIOCSIFMTU: + /* + * Set the interface MTU. + */ + if (ifr->ifr_mtu > ETHERMTU) { + error = EINVAL; + } else { + ifp->if_mtu = ifr->ifr_mtu; + } + break; + default: + error = EINVAL; /* XXX netbsd has ENOTTY??? */ + break; + } + return (error); +} |