1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2010 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #include <sys/types.h> 28 #include <sys/stream.h> 29 #include <net/bpf.h> 30 #include <net/bpfdesc.h> 31 32 /* 33 * This file provides the link to the functions required from the mac 34 * module. It is currently in bpf, rather than mac (like ipnet_bpf) 35 * because of the mac/dls split. The bpf driver needs to know when 36 * interfaces appear and disappear and the best place for that is in 37 * dls. Unfortunately all of the other functions used here are found 38 * in the mac module, making it seem ill suited to being at home in 39 * dls. Similarly it has even less purpose being in mac as it is 40 * today. 41 */ 42 static int mac_bpf_open(const char *, uintptr_t *, zoneid_t); 43 static void mac_bpf_close(uintptr_t); 44 static const char *mac_bpf_name(uintptr_t); 45 static int mac_bpf_type(uintptr_t); 46 static void mac_bpf_sdu_get(uintptr_t, uint_t *); 47 static int mac_bpf_tx(uintptr_t, mblk_t *); 48 static uintptr_t mac_bpf_promisc_add(uintptr_t, int, void *, uintptr_t *, int); 49 static void mac_bpf_promisc_remove(uintptr_t); 50 static int mac_bpf_client_open(uintptr_t, uintptr_t *); 51 static void mac_bpf_client_close(uintptr_t); 52 static const char *mac_bpf_client_name(uintptr_t); 53 static int mac_bpf_getdlt(uintptr_t, uint_t *); 54 static int mac_bpf_getlinkid(const char *, datalink_id_t *, zoneid_t); 55 static int mac_bpf_getzone(uintptr_t, zoneid_t *); 56 57 bpf_provider_t bpf_mac = { 58 BPR_MAC, 59 mac_bpf_open, 60 mac_bpf_close, 61 mac_bpf_name, 62 mac_bpf_type, 63 mac_bpf_sdu_get, 64 mac_bpf_tx, 65 mac_bpf_promisc_add, 66 mac_bpf_promisc_remove, 67 mac_bpf_getlinkid, 68 mac_bpf_client_close, 69 mac_bpf_client_name, 70 mac_bpf_client_open, 71 mac_bpf_getzone, 72 mac_bpf_getdlt 73 }; 74 75 /*ARGSUSED*/ 76 static int 77 mac_bpf_open(const char *name, uintptr_t *mhandlep, zoneid_t zoneid) 78 { 79 return (mac_open_by_linkname(name, (mac_handle_t *)mhandlep)); 80 } 81 82 static void 83 mac_bpf_close(uintptr_t mhandle) 84 { 85 mac_close((mac_handle_t)mhandle); 86 } 87 88 static const char * 89 mac_bpf_name(uintptr_t mhandle) 90 { 91 return (mac_name((mac_handle_t)mhandle)); 92 } 93 94 static int 95 mac_bpf_type(uintptr_t mhandle) 96 { 97 return (mac_nativetype((mac_handle_t)mhandle)); 98 } 99 100 static void 101 mac_bpf_sdu_get(uintptr_t mhandle, uint_t *mtup) 102 { 103 mac_sdu_get((mac_handle_t)mhandle, NULL, mtup); 104 } 105 106 static int 107 mac_bpf_tx(uintptr_t chandle, mblk_t *pkt) 108 { 109 /* 110 * If the mac layer cannot deliver a packet as requested by BPF then 111 * simply have the mac layer drop it. BPF isn't interested in doing 112 * any amount of retry - that's left to the application. 113 */ 114 return (mac_tx((mac_client_handle_t)chandle, pkt, 0, 115 MAC_DROP_ON_NO_DESC, NULL)); 116 } 117 118 static uintptr_t 119 mac_bpf_promisc_add(uintptr_t chandle, int how, void *arg, uintptr_t *promisc, 120 int flags) 121 { 122 return (mac_promisc_add((mac_client_handle_t)chandle, how, bpf_mtap, 123 arg, (mac_promisc_handle_t *)promisc, flags)); 124 } 125 126 static void 127 mac_bpf_promisc_remove(uintptr_t phandle) 128 { 129 mac_promisc_remove((mac_promisc_handle_t)phandle); 130 } 131 132 static int 133 mac_bpf_client_open(uintptr_t mhandle, uintptr_t *chandlep) 134 { 135 return (mac_client_open((mac_handle_t)mhandle, 136 (mac_client_handle_t *)chandlep, NULL, 137 MAC_OPEN_FLAGS_USE_DATALINK_NAME)); 138 } 139 140 static void 141 mac_bpf_client_close(uintptr_t chandle) 142 { 143 mac_client_close((mac_client_handle_t)chandle, 0); 144 } 145 146 static const char * 147 mac_bpf_client_name(uintptr_t chandle) 148 { 149 return (mac_client_name((mac_client_handle_t)chandle)); 150 } 151 152 /*ARGSUSED*/ 153 static int 154 mac_bpf_getlinkid(const char *name, datalink_id_t *idp, zoneid_t zoneid) 155 { 156 int error; 157 158 /* 159 * If at first we don't succeed, try again, just in case it is in 160 * hiding. The first call requires the datalink management daemon 161 * (the authorative source of information about name to id mapping) 162 * to be present and answering upcalls, the seond does not. 163 */ 164 error = dls_mgmt_get_linkid(name, idp); 165 if (error != 0) 166 error = dls_devnet_macname2linkid(name, idp); 167 168 return (error); 169 } 170 171 static int 172 mac_bpf_getzone(uintptr_t handle, zoneid_t *zip) 173 { 174 mac_perim_handle_t mph; 175 int error; 176 177 mac_perim_enter_by_mh((mac_handle_t)handle, &mph); 178 error = dls_link_getzid(mac_name((mac_handle_t)handle), zip); 179 mac_perim_exit(mph); 180 return (error); 181 } 182 183 static int 184 mac_bpf_getdlt(uintptr_t handle, uint_t *dltp) 185 { 186 *dltp = mac_nativetype((mac_handle_t)handle); 187 188 return (0); 189 } 190