]> git.saurik.com Git - apple/xnu.git/blobdiff - bsd/net/ether_if_module.c
xnu-3248.60.10.tar.gz
[apple/xnu.git] / bsd / net / ether_if_module.c
index 4673b53a3ef438586ea4e6d8bc0cc16d3f5d9efd..8fd6074f13b031c19f5bd535ba8b749b32c109df 100644 (file)
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2013 Apple Inc. All rights reserved.
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
@@ -59,8 +59,6 @@
  *
  */
 
-
-
 #include <sys/param.h>
 #include <sys/systm.h>
 #include <sys/kernel.h>
 
 #include <pexpert/pexpert.h>
 
+#define etherbroadcastaddr     fugly
 #include <net/if.h>
 #include <net/route.h>
 #include <net/if_llc.h>
 #include <net/if_dl.h>
 #include <net/if_types.h>
 #include <net/if_ether.h>
+#include <net/if_gif.h>
 #include <netinet/if_ether.h>
 #include <netinet/in.h>        /* For M_LOOP */
 #include <net/kpi_interface.h>
 #include <net/kpi_protocol.h>
+#undef etherbroadcastaddr
 
 /*
 #if INET
 #include <net/ether_if_module.h>
 #include <sys/socketvar.h>
 #include <net/if_vlan_var.h>
-#include <net/if_bond_var.h>
+#if BOND
+#include <net/if_bond_internal.h>
+#endif /* BOND */
+#if IF_BRIDGE
+#include <net/if_bridgevar.h>
+#endif /* IF_BRIDGE */
 
 #include <net/dlil.h>
 
-#if LLC && CCITT
-extern struct ifqueue pkintrq;
-#endif
-
-/* General stuff from if_ethersubr.c - may not need some of it */
-
-#include <netat/at_pat.h>
-#if NETAT
-extern struct ifqueue atalkintrq;
-#endif
-
-
-#if BRIDGE
-#include <net/bridge.h>
-#endif
-
 #define memcpy(x,y,z)  bcopy(y, x, z)
 
-
 SYSCTL_DECL(_net_link);
-SYSCTL_NODE(_net_link, IFT_ETHER, ether, CTLFLAG_RW|CTLFLAG_LOCKED, 0, "Ethernet");
+SYSCTL_NODE(_net_link, IFT_ETHER, ether, CTLFLAG_RW|CTLFLAG_LOCKED, 0,
+    "Ethernet");
 
 struct en_desc {
-       u_int16_t       type;                   /* Type of protocol stored in data */
-       u_long          protocol_family;        /* Protocol family */
-       u_long          data[2];                /* Protocol data */
+       u_int16_t type;                 /* Type of protocol stored in data */
+       u_int32_t protocol_family;      /* Protocol family */
+       u_int32_t data[2];              /* Protocol data */
 };
 
 /* descriptors are allocated in blocks of ETHER_DESC_BLK_SIZE */
-#if CONFIG_EMBEDDED
-#define ETHER_DESC_BLK_SIZE (2) /* IP, ARP */
-#else
 #define ETHER_DESC_BLK_SIZE (10)
-#endif
 
 /*
- * Header for the demux list, hangs off of IFP at family_cookie
+ * Header for the demux list, hangs off of IFP at if_family_cookie
  */
-
 struct ether_desc_blk_str {
-       u_long  n_max_used;
-       u_long  n_count;
-       u_long  n_used;
+       u_int32_t  n_max_used;
+       u_int32_t       n_count;
+       u_int32_t       n_used;
        struct en_desc  block_ptr[1];
 };
-/* Size of the above struct before the array of struct en_desc */
-#define ETHER_DESC_HEADER_SIZE ((size_t)offsetof(struct ether_desc_blk_str, block_ptr))
-__private_extern__ u_char      etherbroadcastaddr[ETHER_ADDR_LEN] =
-                                                               { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 
-#if defined (__arm__)
-static __inline__ int
-_ether_cmp(const void * a, const void * b)
-{
-       return (memcmp(a, b, ETHER_ADDR_LEN));
-}
+/* Size of the above struct before the array of struct en_desc */
+#define ETHER_DESC_HEADER_SIZE \
+       ((size_t) offsetof(struct ether_desc_blk_str, block_ptr))
 
-#else
-static __inline__ int
-_ether_cmp(const void * a, const void * b)
-{
-       const u_int16_t * a_s = (const u_int16_t *)a;
-       const u_int16_t * b_s = (const u_int16_t *)b;
-       
-       if (a_s[0] != b_s[0]
-           || a_s[1] != b_s[1]
-           || a_s[2] != b_s[2]) {
-               return (1);
-       }
-       return (0);
-}
-#endif
+__private_extern__ u_char etherbroadcastaddr[ETHER_ADDR_LEN] =
+    { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 
 /*
  * Release all descriptor entries owned by this protocol (there may be several).
@@ -178,122 +143,122 @@ _ether_cmp(const void * a, const void * b)
  * the unused entries.
  */
 int
-ether_del_proto(
-       ifnet_t ifp,
-       protocol_family_t protocol_family)
+ether_del_proto(ifnet_t ifp, protocol_family_t protocol_family)
 {
-       struct ether_desc_blk_str *desc_blk = (struct ether_desc_blk_str *)ifp->family_cookie;
-       u_long  current = 0;
+       struct ether_desc_blk_str *desc_blk =
+           (struct ether_desc_blk_str *)ifp->if_family_cookie;
+       u_int32_t current = 0;
        int found = 0;
-       
+
        if (desc_blk == NULL)
-               return 0;
-       
+               return (0);
+
        for (current = desc_blk->n_max_used; current > 0; current--) {
-               if (desc_blk->block_ptr[current - 1].protocol_family == protocol_family) {
+               if (desc_blk->block_ptr[current - 1].protocol_family ==
+                   protocol_family) {
                        found = 1;
                        desc_blk->block_ptr[current - 1].type = 0;
                        desc_blk->n_used--;
                }
        }
-       
+
        if (desc_blk->n_used == 0) {
-               FREE(ifp->family_cookie, M_IFADDR);
-               ifp->family_cookie = 0;
-       }
-       else {
+               FREE(ifp->if_family_cookie, M_IFADDR);
+               ifp->if_family_cookie = 0;
+       } else {
                /* Decrement n_max_used */
-               for (; desc_blk->n_max_used > 0 && desc_blk->block_ptr[desc_blk->n_max_used - 1].type == 0; desc_blk->n_max_used--)
+               for (; desc_blk->n_max_used > 0 &&
+                   desc_blk->block_ptr[desc_blk->n_max_used - 1].type == 0;
+                   desc_blk->n_max_used--)
                        ;
        }
-       
-       return 0;
- }
 
+       return (0);
+}
 
 static int
-ether_add_proto_internal(
-       struct ifnet                                    *ifp,
-       protocol_family_t                               protocol,
-       const struct ifnet_demux_desc   *demux)
+ether_add_proto_internal(struct ifnet *ifp, protocol_family_t protocol,
+    const struct ifnet_demux_desc *demux)
 {
        struct en_desc *ed;
-       struct ether_desc_blk_str *desc_blk = (struct ether_desc_blk_str *)ifp->family_cookie;
+       struct ether_desc_blk_str *desc_blk =
+           (struct ether_desc_blk_str *)ifp->if_family_cookie;
        u_int32_t i;
-       
+
        switch (demux->type) {
-               /* These types are supported */
-               /* Top three are preferred */
+       /* These types are supported */
+       /* Top three are preferred */
+       case DLIL_DESC_ETYPE2:
+               if (demux->datalen != 2)
+                       return (EINVAL);
+               break;
+
+       case DLIL_DESC_SAP:
+               if (demux->datalen != 3)
+                       return (EINVAL);
+               break;
+
+       case DLIL_DESC_SNAP:
+               if (demux->datalen != 5)
+                       return (EINVAL);
+               break;
+
+       default:
+               return (ENOTSUP);
+       }
+
+       /* Verify a matching descriptor does not exist */
+       if (desc_blk != NULL) {
+               switch (demux->type) {
                case DLIL_DESC_ETYPE2:
-                       if (demux->datalen != 2) {
-                               return EINVAL;
+                       for (i = 0; i < desc_blk->n_max_used; i++) {
+                               if (desc_blk->block_ptr[i].type ==
+                                   DLIL_DESC_ETYPE2 &&
+                                   desc_blk->block_ptr[i].data[0] ==
+                                   *(u_int16_t*)demux->data) {
+                                       return (EADDRINUSE);
+                               }
                        }
                        break;
-               
                case DLIL_DESC_SAP:
-                       if (demux->datalen != 3) {
-                               return EINVAL;
-                       }
-                       break;
-               
                case DLIL_DESC_SNAP:
-                       if (demux->datalen != 5) {
-                               return EINVAL;
+                       for (i = 0; i < desc_blk->n_max_used; i++) {
+                               if (desc_blk->block_ptr[i].type ==
+                                   demux->type &&
+                                   bcmp(desc_blk->block_ptr[i].data,
+                                   demux->data, demux->datalen) == 0) {
+                                       return (EADDRINUSE);
+                               }
                        }
                        break;
-                       
-               default:
-                       return ENOTSUP;
-       }
-       
-       // Verify a matching descriptor does not exist.
-       if (desc_blk != NULL) {
-               switch (demux->type) {
-                       case DLIL_DESC_ETYPE2:
-                               for (i = 0; i < desc_blk->n_max_used; i++) {
-                                       if (desc_blk->block_ptr[i].type == DLIL_DESC_ETYPE2 &&
-                                               desc_blk->block_ptr[i].data[0] ==
-                                               *(u_int16_t*)demux->data) {
-                                               return EADDRINUSE;
-                                       }
-                               }
-                               break;
-                       case DLIL_DESC_SAP:
-                       case DLIL_DESC_SNAP:
-                               for (i = 0; i < desc_blk->n_max_used; i++) {
-                                       if (desc_blk->block_ptr[i].type == demux->type &&
-                                               bcmp(desc_blk->block_ptr[i].data, demux->data,
-                                                        demux->datalen) == 0) {
-                                               return EADDRINUSE;
-                                       }
-                               }
-                               break;
                }
        }
-       
-       // Check for case where all of the descriptor blocks are in use
+
+       /* Check for case where all of the descriptor blocks are in use */
        if (desc_blk == NULL || desc_blk->n_used == desc_blk->n_count) {
                struct ether_desc_blk_str *tmp;
-               u_long  new_count = ETHER_DESC_BLK_SIZE;
-               u_long  new_size;
-               u_long  old_size = 0;
-               
+               u_int32_t new_count = ETHER_DESC_BLK_SIZE;
+               u_int32_t new_size;
+               u_int32_t old_size = 0;
+
                i = 0;
-               
+
                if (desc_blk) {
                        new_count += desc_blk->n_count;
-                       old_size = desc_blk->n_count * sizeof(struct en_desc) + ETHER_DESC_HEADER_SIZE;
+                       old_size = desc_blk->n_count * sizeof (struct en_desc) +
+                           ETHER_DESC_HEADER_SIZE;
                        i = desc_blk->n_used;
                }
-               
-               new_size = new_count * sizeof(struct en_desc) + ETHER_DESC_HEADER_SIZE;
-               
+
+               new_size = new_count * sizeof (struct en_desc) +
+                   ETHER_DESC_HEADER_SIZE;
+
                tmp = _MALLOC(new_size, M_IFADDR, M_WAITOK);
-               if (tmp  == 0) {
+               if (tmp  == NULL) {
                        /*
                         * Remove any previous descriptors set in the call.
                         */
-                       return ENOMEM;
+                       return (ENOMEM);
                }
 
                bzero(((char *)tmp) + old_size, new_size - old_size);
@@ -302,10 +267,9 @@ ether_add_proto_internal(
                        FREE(desc_blk, M_IFADDR);
                }
                desc_blk = tmp;
-               ifp->family_cookie = (u_long)desc_blk;
+               ifp->if_family_cookie = (uintptr_t)desc_blk;
                desc_blk->n_count = new_count;
-       }
-       else {
+       } else {
                /* Find a free entry */
                for (i = 0; i < desc_blk->n_count; i++) {
                        if (desc_blk->block_ptr[i].type == 0) {
@@ -313,53 +277,50 @@ ether_add_proto_internal(
                        }
                }
        }
-       
+
        /* Bump n_max_used if appropriate */
        if (i + 1 > desc_blk->n_max_used) {
                desc_blk->n_max_used = i + 1;
        }
-       
+
        ed = &desc_blk->block_ptr[i];
        ed->protocol_family = protocol;
        ed->data[0] = 0;
        ed->data[1] = 0;
-       
+
        switch (demux->type) {
-               case DLIL_DESC_ETYPE2:
-                       /* 2 byte ethernet raw protocol type is at native_type */
-                       /* prtocol must be in network byte order */
-                       ed->type = DLIL_DESC_ETYPE2;
-                       ed->data[0] = *(u_int16_t*)demux->data;
-                       break;
-               
-               case DLIL_DESC_SAP:
-                       ed->type = DLIL_DESC_SAP;
-                       bcopy(demux->data, &ed->data[0], 3);
-                       break;
-               
-               case DLIL_DESC_SNAP: {
-                       u_int8_t*       pDest = ((u_int8_t*)&ed->data[0]) + 3;
-                       ed->type = DLIL_DESC_SNAP;
-                       bcopy(demux->data, pDest, 5);
-                       }
-                       break;
+       case DLIL_DESC_ETYPE2:
+               /* 2 byte ethernet raw protocol type is at native_type */
+               /* prtocol must be in network byte order */
+               ed->type = DLIL_DESC_ETYPE2;
+               ed->data[0] = *(u_int16_t*)demux->data;
+               break;
+
+       case DLIL_DESC_SAP:
+               ed->type = DLIL_DESC_SAP;
+               bcopy(demux->data, &ed->data[0], 3);
+               break;
+
+       case DLIL_DESC_SNAP: {
+               u_int8_t*       pDest = ((u_int8_t*)&ed->data[0]) + 3;
+               ed->type = DLIL_DESC_SNAP;
+               bcopy(demux->data, pDest, 5);
+               break;
+       }
        }
-       
+
        desc_blk->n_used++;
-       
-       return 0;
+
+       return (0);
 }
 
 int
-ether_add_proto(
-       ifnet_t                         ifp,
-       protocol_family_t       protocol,
-       const struct ifnet_demux_desc *demux_list,
-       u_int32_t                       demux_count)
+ether_add_proto(ifnet_t         ifp, protocol_family_t protocol,
+    const struct ifnet_demux_desc *demux_list, u_int32_t demux_count)
 {
-       int                     error = 0;
-       u_int32_t       i;
-       
+       int error = 0;
+       u_int32_t i;
+
        for (i = 0; i < demux_count; i++) {
                error = ether_add_proto_internal(ifp, protocol, &demux_list[i]);
                if (error) {
@@ -367,27 +328,25 @@ ether_add_proto(
                        break;
                }
        }
-       
-       return error;
+
+       return (error);
 }
 
 int
-ether_demux(
-       ifnet_t                         ifp,
-       mbuf_t                          m,
-       char                            *frame_header,
-       protocol_family_t       *protocol_family)
+ether_demux(ifnet_t ifp, mbuf_t m, char *frame_header,
+    protocol_family_t *protocol_family)
 {
-       struct ether_header *eh = (struct ether_header *)frame_header;
-       u_short                 ether_type = eh->ether_type;
-       u_int16_t               type;
-       u_int8_t                *data;
-       u_long                  i = 0;
-       struct ether_desc_blk_str *desc_blk = (struct ether_desc_blk_str *)ifp->family_cookie;
-       u_long                  maxd = desc_blk ? desc_blk->n_max_used : 0;
+       struct ether_header *eh = (struct ether_header *)(void *)frame_header;
+       u_short  ether_type = eh->ether_type;
+       u_int16_t type;
+       u_int8_t *data;
+       u_int32_t i = 0;
+       struct ether_desc_blk_str *desc_blk =
+           (struct ether_desc_blk_str *)ifp->if_family_cookie;
+       u_int32_t maxd = desc_blk ? desc_blk->n_max_used : 0;
        struct en_desc  *ed = desc_blk ? desc_blk->block_ptr : NULL;
-       u_int32_t               extProto1 = 0;
-       u_int32_t               extProto2 = 0;
+       u_int32_t extProto1 = 0;
+       u_int32_t extProto2 = 0;
 
        if (eh->ether_dhost[0] & 1) {
                /* Check for broadcast */
@@ -397,6 +356,16 @@ ether_demux(
                        m->m_flags |= M_MCAST;
        }
 
+       if (m->m_flags & M_HASFCS) {
+                /*
+                 * If the M_HASFCS is set by the driver we want to make sure
+                 * that we strip off the trailing FCS data before handing it
+                 * up the stack.
+                 */
+                m_adj(m, -ETHER_CRC_LEN);
+               m->m_flags &= ~M_HASFCS;
+        }
+
        if (ifp->if_eflags & IFEF_BOND) {
                /* if we're bonded, bond "protocol" gets all the packets */
                *protocol_family = PF_BOND;
@@ -405,38 +374,63 @@ ether_demux(
 
        if ((eh->ether_dhost[0] & 1) == 0) {
                /*
-                * When the driver is put into promiscuous mode we may receive unicast
-                * frames that are not intended for our interfaces.  They are marked here
-                * as being promiscuous so the caller may dispose of them after passing
-                * the packets to any interface filters.
+                * When the driver is put into promiscuous mode we may receive
+                * unicast frames that are not intended for our interfaces.
+                * They are marked here as being promiscuous so the caller may
+                * dispose of them after passing the packets to any interface
+                * filters.
                 */
-               if (_ether_cmp(eh->ether_dhost, ifnet_lladdr(ifp))) {
+               if (_ether_cmp(eh->ether_dhost, IF_LLADDR(ifp))) {
                        m->m_flags |= M_PROMISC;
                }
        }
-       
-       /* Quick check for VLAN */
-       if ((m->m_pkthdr.csum_flags & CSUM_VLAN_TAG_VALID) != 0 ||
-               ether_type == htons(ETHERTYPE_VLAN)) {
-               *protocol_family = PF_VLAN;
-               return 0;
-       }
-       
+
+       /* check for VLAN */
+       if ((m->m_pkthdr.csum_flags & CSUM_VLAN_TAG_VALID) != 0) {
+               if (EVL_VLANOFTAG(m->m_pkthdr.vlan_tag) != 0) {
+                       *protocol_family = PF_VLAN;
+                       return (0);
+               }
+               /* the packet is just priority-tagged, clear the bit */
+               m->m_pkthdr.csum_flags &= ~CSUM_VLAN_TAG_VALID;
+       } else if (ether_type == htons(ETHERTYPE_VLAN)) {
+               struct ether_vlan_header *      evl;
+
+               evl = (struct ether_vlan_header *)(void *)frame_header;
+               if (m->m_len < ETHER_VLAN_ENCAP_LEN ||
+                   ntohs(evl->evl_proto) == ETHERTYPE_VLAN ||
+                   EVL_VLANOFTAG(ntohs(evl->evl_tag)) != 0) {
+                       *protocol_family = PF_VLAN;
+                       return (0);
+               }
+               /* the packet is just priority-tagged */
+
+               /* make the encapsulated ethertype the actual ethertype */
+               ether_type = evl->evl_encap_proto = evl->evl_proto;
+
+               /* remove the encapsulation header */
+               m->m_len -= ETHER_VLAN_ENCAP_LEN;
+               m->m_data += ETHER_VLAN_ENCAP_LEN;
+               m->m_pkthdr.len -= ETHER_VLAN_ENCAP_LEN;
+               m->m_pkthdr.csum_flags = 0; /* can't trust hardware checksum */
+       } else if (ether_type == htons(ETHERTYPE_ARP))
+               m->m_pkthdr.pkt_flags |= PKTF_INET_RESOLVE; /* ARP packet */
+
        data = mtod(m, u_int8_t*);
-       
+
        /*
        * Determine the packet's protocol type and stuff the protocol into
        * longs for quick compares.
        */
-       
        if (ntohs(ether_type) <= 1500) {
-               extProto1 = *(u_int32_t*)data;
-               
-               // SAP or SNAP
+               bcopy(data, &extProto1, sizeof (u_int32_t));
+
+               /* SAP or SNAP */
                if ((extProto1 & htonl(0xFFFFFF00)) == htonl(0xAAAA0300)) {
-                       // SNAP
+                       /* SNAP */
                        type = DLIL_DESC_SNAP;
-                       extProto2 = *(u_int32_t*)(data + sizeof(u_int32_t));
+                       bcopy(data + sizeof (u_int32_t), &extProto2,
+                           sizeof (u_int32_t));
                        extProto1 &= htonl(0x000000FF);
                } else {
                        type = DLIL_DESC_SAP;
@@ -445,43 +439,72 @@ ether_demux(
        } else {
                type = DLIL_DESC_ETYPE2;
        }
-       
-       /* 
-       * Search through the connected protocols for a match. 
+
+       /*
+       * Search through the connected protocols for a match.
        */
-       
        switch (type) {
-               case DLIL_DESC_ETYPE2:
-                       for (i = 0; i < maxd; i++) {
-                               if ((ed[i].type == type) && (ed[i].data[0] == ether_type)) {
-                                       *protocol_family = ed[i].protocol_family;
-                                       return 0;
-                               }
-                       }
-                       break;
-               
-               case DLIL_DESC_SAP:
-                       for (i = 0; i < maxd; i++) {
-                               if ((ed[i].type == type) && (ed[i].data[0] == extProto1)) {
-                                       *protocol_family = ed[i].protocol_family;
-                                       return 0;
-                               }
+       case DLIL_DESC_ETYPE2:
+               for (i = 0; i < maxd; i++) {
+                       if ((ed[i].type == type) &&
+                           (ed[i].data[0] == ether_type)) {
+                               *protocol_family = ed[i].protocol_family;
+                               return (0);
                        }
-                       break;
-               
-               case DLIL_DESC_SNAP:
-                       for (i = 0; i < maxd; i++) {
-                               if ((ed[i].type == type) && (ed[i].data[0] == extProto1) &&
-                                       (ed[i].data[1] == extProto2)) {
-                                       *protocol_family = ed[i].protocol_family;
-                                       return 0;
-                               }
+               }
+               break;
+
+       case DLIL_DESC_SAP:
+               for (i = 0; i < maxd; i++) {
+                       if ((ed[i].type == type) &&
+                           (ed[i].data[0] == extProto1)) {
+                               *protocol_family = ed[i].protocol_family;
+                               return (0);
                        }
+               }
                break;
+
+       case DLIL_DESC_SNAP:
+               for (i = 0; i < maxd; i++) {
+                       if ((ed[i].type == type) &&
+                           (ed[i].data[0] == extProto1) &&
+                               (ed[i].data[1] == extProto2)) {
+                               *protocol_family = ed[i].protocol_family;
+                               return (0);
+                       }
+               }
+       break;
        }
-       
-       return ENOENT;
-}                      
+
+       return (ENOENT);
+}
+
+/*
+ * On embedded, ether_frameout is practicaly ether_frameout_extended.
+ * On non-embedded, ether_frameout has long been exposed as a public KPI,
+ * and therefore its signature must remain the same (without the pre- and
+ * postpend length parameters.)
+ */
+#if KPI_INTERFACE_EMBEDDED
+int
+ether_frameout(struct ifnet *ifp, struct mbuf **m,
+    const struct sockaddr *ndest, const char *edst,
+    const char *ether_type, u_int32_t *prepend_len, u_int32_t *postpend_len)
+#else /* !KPI_INTERFACE_EMBEDDED */
+int
+ether_frameout(struct ifnet *ifp, struct mbuf **m,
+    const struct sockaddr *ndest, const char *edst,
+    const char *ether_type)
+#endif /* KPI_INTERFACE_EMBEDDED */
+{
+#if KPI_INTERFACE_EMBEDDED
+       return (ether_frameout_extended(ifp, m, ndest, edst, ether_type,
+           prepend_len, postpend_len));
+#else /* !KPI_INTERFACE_EMBEDDED */
+       return (ether_frameout_extended(ifp, m, ndest, edst, ether_type,
+           NULL, NULL));
+#endif /* !KPI_INTERFACE_EMBEDDED */
+}
 
 /*
  * Ethernet output routine.
@@ -490,12 +513,9 @@ ether_demux(
  * packet leaves a multiple of 512 bytes of data in remainder.
  */
 int
-ether_frameout(
-       struct ifnet                    *ifp,
-       struct mbuf                             **m,
-       const struct sockaddr   *ndest,
-       const char                              *edst,
-       const char                              *ether_type)
+ether_frameout_extended(struct ifnet *ifp, struct mbuf **m,
+    const struct sockaddr *ndest, const char *edst,
+    const char *ether_type, u_int32_t *prepend_len, u_int32_t *postpend_len)
 {
        struct ether_header *eh;
        int hlen;       /* link layer header length */
@@ -512,115 +532,111 @@ ether_frameout(
         * reasons and compatibility with the original behavior.
         */
        if ((ifp->if_flags & IFF_SIMPLEX) &&
-           ((*m)->m_flags & M_LOOP)) {
-           if (lo_ifp) {
-            if ((*m)->m_flags & M_BCAST) {
-                struct mbuf *n = m_copy(*m, 0, (int)M_COPYALL);
-                if (n != NULL)
-                    dlil_output(lo_ifp, ndest->sa_family, n, NULL, ndest, 0);
-            }
-            else {
-                                       if (_ether_cmp(edst, ifnet_lladdr(ifp)) == 0) {
-                    dlil_output(lo_ifp, ndest->sa_family, *m, NULL, ndest, 0);
-                    return EJUSTRETURN;
-                }
-            }
-           }
+           ((*m)->m_flags & M_LOOP) && lo_ifp != NULL) {
+               if ((*m)->m_flags & M_BCAST) {
+                       struct mbuf *n = m_copy(*m, 0, (int)M_COPYALL);
+                       if (n != NULL) {
+                               dlil_output(lo_ifp, ndest->sa_family,
+                                   n, NULL, ndest, 0, NULL);
+                       }
+               } else if (_ether_cmp(edst, IF_LLADDR(ifp)) == 0) {
+                       dlil_output(lo_ifp, ndest->sa_family, *m,
+                           NULL, ndest, 0, NULL);
+                       return (EJUSTRETURN);
+               }
        }
-    
+
        /*
         * Add local net header.  If no space in first mbuf,
         * allocate another.
         */
-       M_PREPEND(*m, sizeof (struct ether_header), M_DONTWAIT);
-       if (*m == 0) {
-           return (EJUSTRETURN);
-       }
+       M_PREPEND(*m, sizeof (struct ether_header), M_DONTWAIT, 0);
+       if (*m == NULL)
+               return (EJUSTRETURN);
 
+       if (prepend_len != NULL)
+               *prepend_len = sizeof (struct ether_header);
+       if (postpend_len != NULL)
+               *postpend_len = 0;
 
        eh = mtod(*m, struct ether_header *);
-       (void)memcpy(&eh->ether_type, ether_type,
-               sizeof(eh->ether_type));
-       (void)memcpy(eh->ether_dhost, edst, ETHER_ADDR_LEN);
-       ifnet_lladdr_copy_bytes(ifp, eh->ether_shost, ETHER_ADDR_LEN);
+       (void) memcpy(&eh->ether_type, ether_type, sizeof(eh->ether_type));
+       (void) memcpy(eh->ether_dhost, edst, ETHER_ADDR_LEN);
+       ifnet_lladdr_copy_bytes(ifp, eh->ether_shost, ETHER_ADDR_LEN);
 
-       return 0;
+       return (0);
 }
 
 errno_t
-ether_check_multi(
-       __unused ifnet_t                ifp,
-       const struct sockaddr   *proto_addr)
+ether_check_multi(ifnet_t ifp, const struct sockaddr *proto_addr)
 {
+#pragma unused(ifp)
        errno_t result = EAFNOSUPPORT;
        const u_char *e_addr;
-       
+
        /*
         * AF_SPEC and AF_LINK don't require translation. We do
         * want to verify that they specify a valid multicast.
         */
        switch(proto_addr->sa_family) {
-               case AF_UNSPEC:
-                       e_addr = (const u_char*)&proto_addr->sa_data[0];
-                       if ((e_addr[0] & 0x01) != 0x01)
-                               result = EADDRNOTAVAIL;
-                       else
-                               result = 0;
-                       break;
-               
-               case AF_LINK:
-                       e_addr = CONST_LLADDR((const struct sockaddr_dl*)proto_addr); 
-                       if ((e_addr[0] & 0x01) != 0x01)
-                               result = EADDRNOTAVAIL;
-                       else
-                               result = 0;
-                       break;
+       case AF_UNSPEC:
+               e_addr = (const u_char*)&proto_addr->sa_data[0];
+               if ((e_addr[0] & 0x01) != 0x01)
+                       result = EADDRNOTAVAIL;
+               else
+                       result = 0;
+               break;
+
+       case AF_LINK:
+               e_addr = CONST_LLADDR((const struct sockaddr_dl*)
+                   (uintptr_t)(size_t)proto_addr);
+               if ((e_addr[0] & 0x01) != 0x01)
+                       result = EADDRNOTAVAIL;
+               else
+                       result = 0;
+               break;
        }
-       
-       return result;
+
+       return (result);
 }
 
 int
-ether_ioctl(
-    __unused ifnet_t   ifp,
-    __unused u_int32_t command,
-    __unused void*             data)
+ether_ioctl(ifnet_t ifp, u_int32_t command, void *data)
 {
-       return EOPNOTSUPP;
+#pragma unused(ifp, command, data)
+       return (EOPNOTSUPP);
 }
 
-__private_extern__ int ether_family_init(void)
+__private_extern__ int
+ether_family_init(void)
 {
        errno_t error = 0;
-       
+
        /* Register protocol registration functions */
        if ((error = proto_register_plumber(PF_INET, APPLE_IF_FAM_ETHERNET,
-                                                                         ether_attach_inet, ether_detach_inet)) != 0) {
-               printf("proto_register_plumber failed for PF_INET error=%d\n", error);
+           ether_attach_inet, ether_detach_inet)) != 0) {
+               printf("proto_register_plumber failed for PF_INET error=%d\n",
+                   error);
                goto done;
        }
 #if INET6
        if ((error = proto_register_plumber(PF_INET6, APPLE_IF_FAM_ETHERNET,
-                                                                         ether_attach_inet6, ether_detach_inet6)) != 0) {
-               printf("proto_register_plumber failed for PF_INET6 error=%d\n", error);
+           ether_attach_inet6, ether_detach_inet6)) != 0) {
+               printf("proto_register_plumber failed for PF_INET6 error=%d\n",
+                   error);
                goto done;
        }
 #endif /* INET6 */
-#if NETAT
-       if ((error = proto_register_plumber(PF_APPLETALK, APPLE_IF_FAM_ETHERNET,
-                                                                         ether_attach_at, ether_detach_at)) != 0) {
-               printf("proto_register_plumber failed PF_APPLETALK error=%d\n", error);
-               goto done;
-       }
-#endif /* NETAT */
 #if VLAN
        vlan_family_init();
 #endif /* VLAN */
 #if BOND
        bond_family_init();
 #endif /* BOND */
+#if IF_BRIDGE
+       bridgeattach(0);
+#endif /* IF_BRIDGE */
+done:
 
- done:
-
-    return (error);
+       return (error);
 }