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 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #include <sys/types.h> 27 #include <sys/stream.h> 28 #include <sys/strsun.h> 29 #include <sys/sunddi.h> 30 #include <sys/kstat.h> 31 #include <sys/kmem.h> 32 #include <sys/sdt.h> 33 #include <net/pfkeyv2.h> 34 #include <inet/common.h> 35 #include <inet/ip.h> 36 #include <inet/ip6.h> 37 #include <inet/ipsec_impl.h> 38 #include <inet/ipdrop.h> 39 40 /* 41 * Packet drop facility. 42 */ 43 44 /* 45 * Initialize drop facility kstats. 46 */ 47 void 48 ip_drop_init(ipsec_stack_t *ipss) 49 { 50 ipss->ipsec_ip_drop_kstat = kstat_create_netstack("ip", 0, "ipdrop", 51 "net", KSTAT_TYPE_NAMED, 52 sizeof (struct ip_dropstats) / sizeof (kstat_named_t), 53 KSTAT_FLAG_PERSISTENT, ipss->ipsec_netstack->netstack_stackid); 54 55 if (ipss->ipsec_ip_drop_kstat == NULL || 56 ipss->ipsec_ip_drop_kstat->ks_data == NULL) 57 return; 58 59 /* 60 * Note: here ipss->ipsec_ip_drop_types is initialized, however, 61 * if the previous kstat_create_netstack failed, it will remain 62 * NULL. Note this is done for all stack instances, so it *could* 63 * be NULL. Hence a non-NULL checking is added where 64 * ipss->ipsec_ip_drop_types is used. This checking is hidden in 65 * the DROPPER macro. 66 */ 67 ipss->ipsec_ip_drop_types = ipss->ipsec_ip_drop_kstat->ks_data; 68 69 /* TCP IPsec drop statistics. */ 70 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_tcp_clear, 71 "tcp_clear", KSTAT_DATA_UINT64); 72 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_tcp_secure, 73 "tcp_secure", KSTAT_DATA_UINT64); 74 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_tcp_mismatch, 75 "tcp_mismatch", KSTAT_DATA_UINT64); 76 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_tcp_ipsec_alloc, 77 "tcp_ipsec_alloc", KSTAT_DATA_UINT64); 78 79 /* SADB-specific drop statistics. */ 80 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_sadb_inlarval_timeout, 81 "sadb_inlarval_timeout", KSTAT_DATA_UINT64); 82 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_sadb_inlarval_replace, 83 "sadb_inlarval_replace", KSTAT_DATA_UINT64); 84 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_sadb_inidle_overflow, 85 "sadb_inidle_overflow", KSTAT_DATA_UINT64); 86 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_sadb_inidle_timeout, 87 "sadb_inidle_timeout", KSTAT_DATA_UINT64); 88 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_sadb_acquire_nomem, 89 "sadb_acquire_nomem", KSTAT_DATA_UINT64); 90 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_sadb_acquire_toofull, 91 "sadb_acquire_toofull", KSTAT_DATA_UINT64); 92 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_sadb_acquire_timeout, 93 "sadb_acquire_timeout", KSTAT_DATA_UINT64); 94 95 /* SPD drop statistics. */ 96 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_spd_ahesp_diffid, 97 "spd_ahesp_diffid", KSTAT_DATA_UINT64); 98 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_spd_loopback_mismatch, 99 "spd_loopback_mismatch", KSTAT_DATA_UINT64); 100 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_spd_explicit, 101 "spd_explicit", KSTAT_DATA_UINT64); 102 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_spd_got_secure, 103 "spd_got_secure", KSTAT_DATA_UINT64); 104 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_spd_got_clear, 105 "spd_got_clear", KSTAT_DATA_UINT64); 106 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_spd_bad_ahalg, 107 "spd_bad_ahalg", KSTAT_DATA_UINT64); 108 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_spd_got_ah, 109 "spd_got_ah", KSTAT_DATA_UINT64); 110 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_spd_bad_espealg, 111 "spd_bad_espealg", KSTAT_DATA_UINT64); 112 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_spd_bad_espaalg, 113 "spd_bad_espaalg", KSTAT_DATA_UINT64); 114 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_spd_got_esp, 115 "spd_got_esp", KSTAT_DATA_UINT64); 116 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_spd_got_selfencap, 117 "spd_got_selfencap", KSTAT_DATA_UINT64); 118 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_spd_bad_selfencap, 119 "spd_bad_selfencap", KSTAT_DATA_UINT64); 120 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_spd_nomem, 121 "spd_nomem", KSTAT_DATA_UINT64); 122 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_spd_ah_badid, 123 "spd_ah_badid", KSTAT_DATA_UINT64); 124 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_spd_ah_innermismatch, 125 "spd_ah_innermismatch", KSTAT_DATA_UINT64); 126 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_spd_esp_innermismatch, 127 "spd_esp_innermismatch", KSTAT_DATA_UINT64); 128 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_spd_esp_badid, 129 "spd_esp_badid", KSTAT_DATA_UINT64); 130 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_spd_no_policy, 131 "spd_no_policy", KSTAT_DATA_UINT64); 132 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_spd_malformed_packet, 133 "spd_malformed_packet", KSTAT_DATA_UINT64); 134 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_spd_malformed_frag, 135 "spd_malformed_frag", KSTAT_DATA_UINT64); 136 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_spd_overlap_frag, 137 "spd_overlap_frag", KSTAT_DATA_UINT64); 138 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_spd_evil_frag, 139 "spd_evil_frag", KSTAT_DATA_UINT64); 140 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_spd_max_frags, 141 "spd_max_frags", KSTAT_DATA_UINT64); 142 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_spd_expired_frags, 143 "spd_expired_frags", KSTAT_DATA_UINT64); 144 145 /* ESP-specific drop statistics. */ 146 147 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_esp_nomem, 148 "esp_nomem", KSTAT_DATA_UINT64); 149 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_esp_no_sa, 150 "esp_no_sa", KSTAT_DATA_UINT64); 151 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_esp_early_replay, 152 "esp_early_replay", KSTAT_DATA_UINT64); 153 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_esp_replay, 154 "esp_replay", KSTAT_DATA_UINT64); 155 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_esp_bytes_expire, 156 "esp_bytes_expire", KSTAT_DATA_UINT64); 157 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_esp_bad_padlen, 158 "esp_bad_padlen", KSTAT_DATA_UINT64); 159 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_esp_bad_padding, 160 "esp_bad_padding", KSTAT_DATA_UINT64); 161 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_esp_bad_auth, 162 "esp_bad_auth", KSTAT_DATA_UINT64); 163 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_esp_crypto_failed, 164 "esp_crypto_failed", KSTAT_DATA_UINT64); 165 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_esp_icmp, 166 "esp_icmp", KSTAT_DATA_UINT64); 167 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_esp_nat_t_ipsec, 168 "esp_nat_t_ipsec", KSTAT_DATA_UINT64); 169 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_esp_nat_t_ka, 170 "esp_nat_t_ka", KSTAT_DATA_UINT64); 171 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_esp_iv_wrap, 172 "esp_iv_wrap", KSTAT_DATA_UINT64); 173 174 /* AH-specific drop statistics. */ 175 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_ah_nomem, 176 "ah_nomem", KSTAT_DATA_UINT64); 177 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_ah_bad_v6_hdrs, 178 "ah_bad_v6_hdrs", KSTAT_DATA_UINT64); 179 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_ah_bad_v4_opts, 180 "ah_bad_v4_opts", KSTAT_DATA_UINT64); 181 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_ah_no_sa, 182 "ah_no_sa", KSTAT_DATA_UINT64); 183 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_ah_bad_length, 184 "ah_bad_length", KSTAT_DATA_UINT64); 185 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_ah_bad_auth, 186 "ah_bad_auth", KSTAT_DATA_UINT64); 187 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_ah_crypto_failed, 188 "ah_crypto_failed", KSTAT_DATA_UINT64); 189 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_ah_early_replay, 190 "ah_early_replay", KSTAT_DATA_UINT64); 191 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_ah_replay, 192 "ah_replay", KSTAT_DATA_UINT64); 193 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_ah_bytes_expire, 194 "ah_bytes_expire", KSTAT_DATA_UINT64); 195 196 /* IP-specific drop statistics. */ 197 kstat_named_init(&ipss->ipsec_ip_drop_types->ipds_ip_ipsec_not_loaded, 198 "ip_ipsec_not_loaded", KSTAT_DATA_UINT64); 199 200 kstat_install(ipss->ipsec_ip_drop_kstat); 201 } 202 203 void 204 ip_drop_destroy(ipsec_stack_t *ipss) 205 { 206 kstat_delete_netstack(ipss->ipsec_ip_drop_kstat, 207 ipss->ipsec_netstack->netstack_stackid); 208 ipss->ipsec_ip_drop_kstat = NULL; 209 ipss->ipsec_ip_drop_types = NULL; 210 } 211 212 /* 213 * Register a packet dropper. 214 */ 215 void 216 ip_drop_register(ipdropper_t *ipd, char *name) 217 { 218 if (ipd->ipd_name != NULL) { 219 cmn_err(CE_WARN, 220 "ip_drop_register: ipdropper %s already registered with %s", 221 name, ipd->ipd_name); 222 return; 223 } 224 225 /* Assume that name is reasonable in length. This isn't user-land. */ 226 ipd->ipd_name = kmem_alloc(strlen(name) + 1, KM_SLEEP); 227 (void) strcpy(ipd->ipd_name, name); 228 } 229 230 /* 231 * Un-register a packet dropper. 232 */ 233 void 234 ip_drop_unregister(ipdropper_t *ipd) 235 { 236 if (ipd->ipd_name == NULL) { 237 cmn_err(CE_WARN, 238 "ip_drop_unregister: not registered (%p)\n", 239 (void *)ipd); 240 return; 241 } 242 kmem_free(ipd->ipd_name, strlen(ipd->ipd_name) + 1); 243 244 ipd->ipd_name = NULL; 245 } 246 247 /* 248 * Actually drop a packet. Many things could happen here, but at the least, 249 * the packet will be freemsg()ed. 250 */ 251 void 252 ip_drop_packet(mblk_t *mp, boolean_t inbound, ill_t *ill, 253 struct kstat_named *counter, ipdropper_t *who_called) 254 { 255 char *str; 256 257 if (mp == NULL) { 258 /* 259 * Return immediately - NULL packets should not affect any 260 * statistics. 261 */ 262 return; 263 } 264 265 ASSERT(mp->b_datap->db_type == M_DATA); 266 267 /* Increment the bean counter, if available. */ 268 if (counter != NULL) { 269 switch (counter->data_type) { 270 case KSTAT_DATA_INT32: 271 counter->value.i32++; 272 break; 273 case KSTAT_DATA_UINT32: 274 counter->value.ui32++; 275 break; 276 case KSTAT_DATA_INT64: 277 counter->value.i64++; 278 break; 279 case KSTAT_DATA_UINT64: 280 counter->value.ui64++; 281 break; 282 /* Other types we can't handle for now. */ 283 } 284 } 285 286 if (counter != NULL) 287 str = counter->name; 288 else if (who_called != NULL) 289 str = who_called->ipd_name; 290 else 291 str = "Unspecified IPsec drop"; 292 293 if (inbound) 294 ip_drop_input(str, mp, ill); 295 else 296 ip_drop_output(str, mp, ill); 297 298 /* TODO: queue the packet onto a snoop-friendly queue. */ 299 300 /* 301 * ASSERT this isn't a b_next linked mblk chain where a 302 * chained dropper should be used instead 303 */ 304 ASSERT(mp->b_prev == NULL && mp->b_next == NULL); 305 freemsg(mp); 306 } 307 308 /* 309 * This is just a convinient place for dtrace to see dropped packets 310 */ 311 /*ARGSUSED*/ 312 void 313 ip_drop_input(char *str, mblk_t *mp, ill_t *ill) 314 { 315 if (mp == NULL) 316 return; 317 318 if (IPH_HDR_VERSION(mp->b_rptr) == IPV4_VERSION) { 319 ipha_t *ipha = (ipha_t *)mp->b_rptr; 320 321 DTRACE_IP7(drop__in, mblk_t *, mp, conn_t *, NULL, void_ip_t *, 322 ipha, __dtrace_ipsr_ill_t *, ill, ipha_t *, ipha, 323 ip6_t *, NULL, int, 0); 324 } else { 325 ip6_t *ip6h = (ip6_t *)mp->b_rptr; 326 327 DTRACE_IP7(drop__in, mblk_t *, mp, conn_t *, NULL, void_ip_t *, 328 ip6h, __dtrace_ipsr_ill_t *, ill, ipha_t *, NULL, 329 ip6_t *, ip6h, int, 0); 330 } 331 } 332 333 /*ARGSUSED*/ 334 void 335 ip_drop_output(char *str, mblk_t *mp, ill_t *ill) 336 { 337 if (mp == NULL) 338 return; 339 340 if (IPH_HDR_VERSION(mp->b_rptr) == IPV4_VERSION) { 341 ipha_t *ipha = (ipha_t *)mp->b_rptr; 342 343 DTRACE_IP7(drop__out, mblk_t *, mp, conn_t *, NULL, void_ip_t *, 344 ipha, __dtrace_ipsr_ill_t *, ill, ipha_t *, ipha, 345 ip6_t *, NULL, int, 0); 346 } else { 347 ip6_t *ip6h = (ip6_t *)mp->b_rptr; 348 349 DTRACE_IP7(drop__out, mblk_t *, mp, conn_t *, NULL, void_ip_t *, 350 ip6h, __dtrace_ipsr_ill_t *, ill, ipha_t *, NULL, 351 ip6_t *, ip6h, int, 0); 352 } 353 } 354
Indexes created Wed Feb 10 09:32:22 UTC 2010
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