xnu-517.tar.gz

[apple/xnu.git] / bsd / net / ether_inet6_pr_module.c

diff --git a/bsd/net/ether_inet6_pr_module.c b/bsd/net/ether_inet6_pr_module.c
index 65901c1ebaadba989273bf020a6edcfe1fd1600f..8d6c582a206c9ba6d002393806df1e1b09174244 100644 (file)
--- a/bsd/net/ether_inet6_pr_module.c
+++ b/bsd/net/ether_inet6_pr_module.c
@@ -257,7 +257,7 @@ inet6_ether_pre_output(ifp, m0, dst_netaddr, route, type, edst, dl_tag )
         if (!nd6_storelladdr(&ac->ac_if, rt, m, dst_netaddr, (u_char *)edst)) {
              /* this must be impossible, so we bark */
              printf("nd6_storelladdr failed\n");
-             return(0);
+             return(EADDRNOTAVAIL); /* dlil_output will free the mbuf */
                 }
        *(u_short *)type = htons(ETHERTYPE_IPV6);
        break;
@@ -266,6 +266,7 @@ inet6_ether_pre_output(ifp, m0, dst_netaddr, route, type, edst, dl_tag )
        printf("%s%d: can't handle af%d\n", ifp->if_name, ifp->if_unit,
               dst_netaddr->sa_family);
 
+       /* dlil_output will free the mbuf */
         return EAFNOSUPPORT;
     }
 
@@ -372,19 +373,18 @@ ether_inet6_prmod_ioctl(dl_tag, ifp, command, data)
 
 
 
-u_long  ether_attach_inet6(struct ifnet *ifp)
+int  ether_attach_inet6(struct ifnet *ifp, u_long *dl_tag)
 {
     struct dlil_proto_reg_str   reg;
     struct dlil_demux_desc      desc;
-    u_long                     ip_dl_tag=0;
     u_short en_6native=ETHERTYPE_IPV6;
     int   stat;
     int i;
 
 
-    stat = dlil_find_dltag(ifp->if_family, ifp->if_unit, PF_INET6, &ip_dl_tag);
+    stat = dlil_find_dltag(ifp->if_family, ifp->if_unit, PF_INET6, dl_tag);
     if (stat == 0)
-        return ip_dl_tag;
+        return stat;
 
     TAILQ_INIT(&reg.demux_desc_head);
     desc.type = DLIL_DESC_RAW;
@@ -403,23 +403,21 @@ u_long  ether_attach_inet6(struct ifnet *ifp)
     reg.default_proto    = 0;
     reg.protocol_family  = PF_INET6;
 
-    stat = dlil_attach_protocol(&reg, &ip_dl_tag);
+    stat = dlil_attach_protocol(&reg, dl_tag);
     if (stat) {
        printf("WARNING: ether_attach_inet6 can't attach ip to interface\n");
-       return stat;
     }
 
-    return ip_dl_tag;
+    return stat;
 }
 
-int  ether_detach_inet6(struct ifnet *ifp)
+int  ether_detach_inet6(struct ifnet *ifp, u_long dl_tag)
 {
-    u_long      ip_dl_tag = 0;
     int         stat;
 
-    stat = dlil_find_dltag(ifp->if_family, ifp->if_unit, PF_INET6, &ip_dl_tag);
+    stat = dlil_find_dltag(ifp->if_family, ifp->if_unit, PF_INET6, &dl_tag);
     if (stat == 0) {
-        stat = dlil_detach_protocol(ip_dl_tag);
+        stat = dlil_detach_protocol(dl_tag);
         if (stat) {
             printf("WARNING: ether_detach_inet6 can't detach ip6 from interface\n");
         }