]> git.saurik.com Git - apple/xnu.git/blobdiff - bsd/net/ether_if_module.c
xnu-2050.7.9.tar.gz
[apple/xnu.git] / bsd / net / ether_if_module.c
index 8a4da6c6c951a5f05941e90ce7e9d6fe6a8ba19d..60b6846d293649ccc3eef179ed97bf0e14e09df8 100644 (file)
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2011 Apple Inc. All rights reserved.
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
@@ -72,6 +72,7 @@
 
 #include <pexpert/pexpert.h>
 
+#define etherbroadcastaddr     fugly
 #include <net/if.h>
 #include <net/route.h>
 #include <net/if_llc.h>
@@ -82,6 +83,7 @@
 #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>
 
@@ -111,10 +118,6 @@ extern struct ifqueue atalkintrq;
 #endif
 
 
-#if BRIDGE
-#include <net/bridge.h>
-#endif
-
 #define memcpy(x,y,z)  bcopy(y, x, z)
 
 
@@ -123,8 +126,8 @@ 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_int32_t               protocol_family;        /* Protocol family */
+       u_int32_t               data[2];                /* Protocol data */
 };
 
 /* descriptors are allocated in blocks of ETHER_DESC_BLK_SIZE */
@@ -135,13 +138,13 @@ struct en_desc {
 #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 */
@@ -149,19 +152,6 @@ struct ether_desc_blk_str {
 __private_extern__ u_char      etherbroadcastaddr[ETHER_ADDR_LEN] =
                                                                { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 
-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);
-}
 
 /*
  * Release all descriptor entries owned by this protocol (there may be several).
@@ -173,8 +163,8 @@ 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)
@@ -189,8 +179,8 @@ ether_del_proto(
        }
        
        if (desc_blk->n_used == 0) {
-               FREE(ifp->family_cookie, M_IFADDR);
-               ifp->family_cookie = 0;
+               FREE(ifp->if_family_cookie, M_IFADDR);
+               ifp->if_family_cookie = 0;
        }
        else {
                /* Decrement n_max_used */
@@ -209,7 +199,7 @@ ether_add_proto_internal(
        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) {
@@ -265,9 +255,9 @@ ether_add_proto_internal(
        // 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;
                
@@ -293,7 +283,7 @@ 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 {
@@ -369,13 +359,13 @@ ether_demux(
        char                            *frame_header,
        protocol_family_t       *protocol_family)
 {
-       struct ether_header *eh = (struct ether_header *)frame_header;
+       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_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;
+       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;
@@ -388,6 +378,16 @@ 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;
@@ -406,11 +406,35 @@ ether_demux(
                }
        }
        
-       /* 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 */
        }
        
        data = mtod(m, u_int8_t*);
@@ -421,13 +445,13 @@ ether_demux(
        */
        
        if (ntohs(ether_type) <= 1500) {
-               extProto1 = *(u_int32_t*)data;
+               bcopy(data, &extProto1, sizeof (u_int32_t));
                
                // SAP or SNAP
                if ((extProto1 & htonl(0xFFFFFF00)) == htonl(0xAAAA0300)) {
                        // 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;
@@ -482,11 +506,17 @@ ether_demux(
  */
 int
 ether_frameout(
-       struct ifnet                    *ifp,
-       struct mbuf                             **m,
-       const struct sockaddr   *ndest,
-       const char                              *edst,
-       const char                              *ether_type)
+                          struct ifnet                 *ifp,
+                          struct mbuf                          **m,
+                          const struct sockaddr        *ndest,
+                          const char                           *edst,
+                          const char                           *ether_type
+#if KPI_INTERFACE_EMBEDDED
+                          ,
+                          u_int32_t                            *prepend_len,
+                          u_int32_t                            *postpend_len
+#endif /* KPI_INTERFACE_EMBEDDED */
+                          )
 {
        struct ether_header *eh;
        int hlen;       /* link layer header length */
@@ -508,11 +538,11 @@ ether_frameout(
             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);
+                    dlil_output(lo_ifp, ndest->sa_family, n, NULL, ndest, 0, NULL);
             }
             else {
                                        if (_ether_cmp(edst, ifnet_lladdr(ifp)) == 0) {
-                    dlil_output(lo_ifp, ndest->sa_family, *m, NULL, ndest, 0);
+                    dlil_output(lo_ifp, ndest->sa_family, *m, NULL, ndest, 0, NULL);
                     return EJUSTRETURN;
                 }
             }
@@ -528,7 +558,11 @@ ether_frameout(
            return (EJUSTRETURN);
        }
 
-
+#if KPI_INTERFACE_EMBEDDED
+       *prepend_len = sizeof (struct ether_header);
+       *postpend_len = 0;
+#endif /* KPI_INTERFACE_EMBEDDED */
+       
        eh = mtod(*m, struct ether_header *);
        (void)memcpy(&eh->ether_type, ether_type,
                sizeof(eh->ether_type));
@@ -560,7 +594,8 @@ ether_check_multi(
                        break;
                
                case AF_LINK:
-                       e_addr = CONST_LLADDR((const struct sockaddr_dl*)proto_addr); 
+                       e_addr = CONST_LLADDR((const struct sockaddr_dl*)
+                           (uintptr_t)(size_t)proto_addr);
                        if ((e_addr[0] & 0x01) != 0x01)
                                result = EADDRNOTAVAIL;
                        else
@@ -610,6 +645,9 @@ __private_extern__ int ether_family_init(void)
 #if BOND
        bond_family_init();
 #endif /* BOND */
+#if IF_BRIDGE
+       bridgeattach(0);
+#endif /* IF_BRIDGE */
 
  done: