uipc_domain.c revision 1.69
1 /* $NetBSD: uipc_domain.c,v 1.69 2007/08/30 02:17:34 dyoung Exp $ */ 2 3 /* 4 * Copyright (c) 1982, 1986, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)uipc_domain.c 8.3 (Berkeley) 2/14/95 32 */ 33 34 #include <sys/cdefs.h> 35 __KERNEL_RCSID(0, "$NetBSD: uipc_domain.c,v 1.69 2007/08/30 02:17:34 dyoung Exp $"); 36 37 #include <sys/param.h> 38 #include <sys/socket.h> 39 #include <sys/socketvar.h> 40 #include <sys/protosw.h> 41 #include <sys/domain.h> 42 #include <sys/mbuf.h> 43 #include <sys/time.h> 44 #include <sys/kernel.h> 45 #include <sys/systm.h> 46 #include <sys/callout.h> 47 #include <sys/queue.h> 48 #include <sys/proc.h> 49 #include <sys/sysctl.h> 50 #include <sys/un.h> 51 #include <sys/unpcb.h> 52 #include <sys/file.h> 53 #include <sys/kauth.h> 54 55 MALLOC_DECLARE(M_SOCKADDR); 56 57 MALLOC_DEFINE(M_SOCKADDR, "sockaddr", "socket endpoints"); 58 59 void pffasttimo(void *); 60 void pfslowtimo(void *); 61 62 struct domainhead domains = STAILQ_HEAD_INITIALIZER(domains); 63 static struct domain *domain_array[AF_MAX]; 64 65 callout_t pffasttimo_ch, pfslowtimo_ch; 66 67 /* 68 * Current time values for fast and slow timeouts. We can use u_int 69 * relatively safely. The fast timer will roll over in 27 years and 70 * the slow timer in 68 years. 71 */ 72 u_int pfslowtimo_now; 73 u_int pffasttimo_now; 74 75 void 76 domaininit(void) 77 { 78 __link_set_decl(domains, struct domain); 79 struct domain * const * dpp; 80 struct domain *rt_domain = NULL; 81 82 /* 83 * Add all of the domains. Make sure the PF_ROUTE 84 * domain is added last. 85 */ 86 __link_set_foreach(dpp, domains) { 87 if ((*dpp)->dom_family == PF_ROUTE) 88 rt_domain = *dpp; 89 else 90 domain_attach(*dpp); 91 } 92 if (rt_domain) 93 domain_attach(rt_domain); 94 95 callout_init(&pffasttimo_ch, 0); 96 callout_init(&pfslowtimo_ch, 0); 97 98 callout_reset(&pffasttimo_ch, 1, pffasttimo, NULL); 99 callout_reset(&pfslowtimo_ch, 1, pfslowtimo, NULL); 100 } 101 102 void 103 domain_attach(struct domain *dp) 104 { 105 const struct protosw *pr; 106 107 STAILQ_INSERT_TAIL(&domains, dp, dom_link); 108 if (dp->dom_family < __arraycount(domain_array)) 109 domain_array[dp->dom_family] = dp; 110 111 if (dp->dom_init) 112 (*dp->dom_init)(); 113 114 #ifdef MBUFTRACE 115 if (dp->dom_mowner.mo_name[0] == '\0') { 116 strncpy(dp->dom_mowner.mo_name, dp->dom_name, 117 sizeof(dp->dom_mowner.mo_name)); 118 MOWNER_ATTACH(&dp->dom_mowner); 119 } 120 #endif 121 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) { 122 if (pr->pr_init) 123 (*pr->pr_init)(); 124 } 125 126 if (max_linkhdr < 16) /* XXX */ 127 max_linkhdr = 16; 128 max_hdr = max_linkhdr + max_protohdr; 129 max_datalen = MHLEN - max_hdr; 130 } 131 132 struct domain * 133 pffinddomain(int family) 134 { 135 struct domain *dp; 136 137 if (family < __arraycount(domain_array) && domain_array[family] != NULL) 138 return domain_array[family]; 139 140 DOMAIN_FOREACH(dp) 141 if (dp->dom_family == family) 142 return (dp); 143 return (NULL); 144 } 145 146 const struct protosw * 147 pffindtype(int family, int type) 148 { 149 struct domain *dp; 150 const struct protosw *pr; 151 152 dp = pffinddomain(family); 153 if (dp == NULL) 154 return (NULL); 155 156 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) 157 if (pr->pr_type && pr->pr_type == type) 158 return (pr); 159 160 return (NULL); 161 } 162 163 const struct protosw * 164 pffindproto(int family, int protocol, int type) 165 { 166 struct domain *dp; 167 const struct protosw *pr; 168 const struct protosw *maybe = NULL; 169 170 if (family == 0) 171 return (NULL); 172 173 dp = pffinddomain(family); 174 if (dp == NULL) 175 return (NULL); 176 177 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) { 178 if ((pr->pr_protocol == protocol) && (pr->pr_type == type)) 179 return (pr); 180 181 if (type == SOCK_RAW && pr->pr_type == SOCK_RAW && 182 pr->pr_protocol == 0 && maybe == NULL) 183 maybe = pr; 184 } 185 return (maybe); 186 } 187 188 struct sockaddr * 189 sockaddr_alloc(sa_family_t af, socklen_t socklen, int flags) 190 { 191 struct sockaddr *sa; 192 socklen_t reallen = MAX(socklen, offsetof(struct sockaddr, sa_data[0])); 193 194 if ((sa = malloc(reallen, M_SOCKADDR, flags)) == NULL) 195 return NULL; 196 197 sa->sa_family = af; 198 sa->sa_len = reallen; 199 return sa; 200 } 201 202 static void 203 sockaddr_fixlen(struct sockaddr *dst, socklen_t socklen, uint8_t deslen) 204 { 205 if (socklen < deslen) 206 panic("%s: source too long, %d bytes", __func__, deslen); 207 dst->sa_len = deslen; 208 } 209 210 struct sockaddr * 211 sockaddr_copy(struct sockaddr *dst, socklen_t socklen, 212 const struct sockaddr *src) 213 { 214 KASSERT(dst->sa_family == src->sa_family); 215 216 if (__predict_false(dst->sa_len < src->sa_len)) 217 sockaddr_fixlen(dst, socklen, src->sa_len); 218 219 memcpy(dst, src, src->sa_len); 220 221 return dst; 222 } 223 224 int 225 sockaddr_cmp(const struct sockaddr *sa1, const struct sockaddr *sa2) 226 { 227 int len, rc; 228 struct domain *dom; 229 230 if (sa1->sa_family != sa2->sa_family) 231 return sa1->sa_family - sa2->sa_family; 232 233 dom = pffinddomain(sa1->sa_family); 234 235 if (dom != NULL && dom->dom_sockaddr_cmp != NULL) 236 return (*dom->dom_sockaddr_cmp)(sa1, sa2); 237 238 len = MIN(sa1->sa_len, sa2->sa_len); 239 240 if (dom == NULL || dom->dom_sa_cmplen == 0) { 241 if ((rc = memcmp(sa1, sa2, len)) != 0) 242 return rc; 243 return sa1->sa_len - sa2->sa_len; 244 } 245 246 if ((rc = memcmp((const char *)sa1 + dom->dom_sa_cmpofs, 247 (const char *)sa2 + dom->dom_sa_cmpofs, 248 MIN(dom->dom_sa_cmplen, 249 len - MIN(len, dom->dom_sa_cmpofs)))) != 0) 250 return rc; 251 252 return MIN(dom->dom_sa_cmplen + dom->dom_sa_cmpofs, sa1->sa_len) - 253 MIN(dom->dom_sa_cmplen + dom->dom_sa_cmpofs, sa2->sa_len); 254 } 255 256 struct sockaddr * 257 sockaddr_dup(const struct sockaddr *src, int flags) 258 { 259 struct sockaddr *dst; 260 261 if ((dst = sockaddr_alloc(src->sa_family, src->sa_len, flags)) == NULL) 262 return NULL; 263 264 return sockaddr_copy(dst, dst->sa_len, src); 265 } 266 267 void 268 sockaddr_free(struct sockaddr *sa) 269 { 270 free(sa, M_SOCKADDR); 271 } 272 273 /* 274 * sysctl helper to stuff PF_LOCAL pcbs into sysctl structures 275 */ 276 static void 277 sysctl_dounpcb(struct kinfo_pcb *pcb, const struct socket *so) 278 { 279 struct unpcb *unp = sotounpcb(so); 280 struct sockaddr_un *un = unp->unp_addr; 281 282 memset(pcb, 0, sizeof(*pcb)); 283 284 pcb->ki_family = so->so_proto->pr_domain->dom_family; 285 pcb->ki_type = so->so_proto->pr_type; 286 pcb->ki_protocol = so->so_proto->pr_protocol; 287 pcb->ki_pflags = unp->unp_flags; 288 289 pcb->ki_pcbaddr = PTRTOUINT64(unp); 290 /* pcb->ki_ppcbaddr = unp has no ppcb... */ 291 pcb->ki_sockaddr = PTRTOUINT64(so); 292 293 pcb->ki_sostate = so->so_state; 294 /* pcb->ki_prstate = unp has no state... */ 295 296 pcb->ki_rcvq = so->so_rcv.sb_cc; 297 pcb->ki_sndq = so->so_snd.sb_cc; 298 299 un = (struct sockaddr_un *)&pcb->ki_src; 300 /* 301 * local domain sockets may bind without having a local 302 * endpoint. bleah! 303 */ 304 if (unp->unp_addr != NULL) { 305 un->sun_len = unp->unp_addr->sun_len; 306 un->sun_family = unp->unp_addr->sun_family; 307 strlcpy(un->sun_path, unp->unp_addr->sun_path, 308 sizeof(pcb->ki_s)); 309 } 310 else { 311 un->sun_len = offsetof(struct sockaddr_un, sun_path); 312 un->sun_family = pcb->ki_family; 313 } 314 if (unp->unp_conn != NULL) { 315 un = (struct sockaddr_un *)&pcb->ki_dst; 316 if (unp->unp_conn->unp_addr != NULL) { 317 un->sun_len = unp->unp_conn->unp_addr->sun_len; 318 un->sun_family = unp->unp_conn->unp_addr->sun_family; 319 un->sun_family = unp->unp_conn->unp_addr->sun_family; 320 strlcpy(un->sun_path, unp->unp_conn->unp_addr->sun_path, 321 sizeof(pcb->ki_d)); 322 } 323 else { 324 un->sun_len = offsetof(struct sockaddr_un, sun_path); 325 un->sun_family = pcb->ki_family; 326 } 327 } 328 329 pcb->ki_inode = unp->unp_ino; 330 pcb->ki_vnode = PTRTOUINT64(unp->unp_vnode); 331 pcb->ki_conn = PTRTOUINT64(unp->unp_conn); 332 pcb->ki_refs = PTRTOUINT64(unp->unp_refs); 333 pcb->ki_nextref = PTRTOUINT64(unp->unp_nextref); 334 } 335 336 static int 337 sysctl_unpcblist(SYSCTLFN_ARGS) 338 { 339 struct file *fp; 340 struct socket *so; 341 struct kinfo_pcb pcb; 342 char *dp; 343 u_int op, arg; 344 size_t len, needed, elem_size, out_size; 345 int error, elem_count, pf, type, pf2; 346 347 if (namelen == 1 && name[0] == CTL_QUERY) 348 return (sysctl_query(SYSCTLFN_CALL(rnode))); 349 350 if (namelen != 4) 351 return (EINVAL); 352 353 if (oldp != NULL) { 354 len = *oldlenp; 355 elem_size = name[2]; 356 elem_count = name[3]; 357 if (elem_size != sizeof(pcb)) 358 return EINVAL; 359 } else { 360 len = 0; 361 elem_size = sizeof(pcb); 362 elem_count = INT_MAX; 363 } 364 error = 0; 365 dp = oldp; 366 op = name[0]; 367 arg = name[1]; 368 out_size = elem_size; 369 needed = 0; 370 371 if (name - oname != 4) 372 return (EINVAL); 373 374 pf = oname[1]; 375 type = oname[2]; 376 pf2 = (oldp == NULL) ? 0 : pf; 377 378 /* 379 * there's no "list" of local domain sockets, so we have 380 * to walk the file list looking for them. :-/ 381 */ 382 LIST_FOREACH(fp, &filehead, f_list) { 383 if (kauth_authorize_generic(l->l_cred, 384 KAUTH_GENERIC_CANSEE, fp->f_cred) != 0) 385 continue; 386 if (fp->f_type != DTYPE_SOCKET) 387 continue; 388 so = (struct socket *)fp->f_data; 389 if (so->so_type != type) 390 continue; 391 if (so->so_proto->pr_domain->dom_family != pf) 392 continue; 393 if (len >= elem_size && elem_count > 0) { 394 sysctl_dounpcb(&pcb, so); 395 error = copyout(&pcb, dp, out_size); 396 if (error) 397 break; 398 dp += elem_size; 399 len -= elem_size; 400 } 401 if (elem_count > 0) { 402 needed += elem_size; 403 if (elem_count != INT_MAX) 404 elem_count--; 405 } 406 } 407 408 *oldlenp = needed; 409 if (oldp == NULL) 410 *oldlenp += PCB_SLOP * sizeof(struct kinfo_pcb); 411 412 return (error); 413 } 414 415 SYSCTL_SETUP(sysctl_net_setup, "sysctl net subtree setup") 416 { 417 sysctl_createv(clog, 0, NULL, NULL, 418 CTLFLAG_PERMANENT, 419 CTLTYPE_NODE, "net", NULL, 420 NULL, 0, NULL, 0, 421 CTL_NET, CTL_EOL); 422 sysctl_createv(clog, 0, NULL, NULL, 423 CTLFLAG_PERMANENT, 424 CTLTYPE_NODE, "local", 425 SYSCTL_DESCR("PF_LOCAL related settings"), 426 NULL, 0, NULL, 0, 427 CTL_NET, PF_LOCAL, CTL_EOL); 428 sysctl_createv(clog, 0, NULL, NULL, 429 CTLFLAG_PERMANENT, 430 CTLTYPE_NODE, "stream", 431 SYSCTL_DESCR("SOCK_STREAM settings"), 432 NULL, 0, NULL, 0, 433 CTL_NET, PF_LOCAL, SOCK_STREAM, CTL_EOL); 434 sysctl_createv(clog, 0, NULL, NULL, 435 CTLFLAG_PERMANENT, 436 CTLTYPE_NODE, "dgram", 437 SYSCTL_DESCR("SOCK_DGRAM settings"), 438 NULL, 0, NULL, 0, 439 CTL_NET, PF_LOCAL, SOCK_DGRAM, CTL_EOL); 440 441 sysctl_createv(clog, 0, NULL, NULL, 442 CTLFLAG_PERMANENT, 443 CTLTYPE_STRUCT, "pcblist", 444 SYSCTL_DESCR("SOCK_STREAM protocol control block list"), 445 sysctl_unpcblist, 0, NULL, 0, 446 CTL_NET, PF_LOCAL, SOCK_STREAM, CTL_CREATE, CTL_EOL); 447 sysctl_createv(clog, 0, NULL, NULL, 448 CTLFLAG_PERMANENT, 449 CTLTYPE_STRUCT, "pcblist", 450 SYSCTL_DESCR("SOCK_DGRAM protocol control block list"), 451 sysctl_unpcblist, 0, NULL, 0, 452 CTL_NET, PF_LOCAL, SOCK_DGRAM, CTL_CREATE, CTL_EOL); 453 } 454 455 void 456 pfctlinput(int cmd, const struct sockaddr *sa) 457 { 458 struct domain *dp; 459 const struct protosw *pr; 460 461 DOMAIN_FOREACH(dp) { 462 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) { 463 if (pr->pr_ctlinput != NULL) 464 (*pr->pr_ctlinput)(cmd, sa, NULL); 465 } 466 } 467 } 468 469 void 470 pfctlinput2(int cmd, const struct sockaddr *sa, void *ctlparam) 471 { 472 struct domain *dp; 473 const struct protosw *pr; 474 475 if (sa == NULL) 476 return; 477 478 DOMAIN_FOREACH(dp) { 479 /* 480 * the check must be made by xx_ctlinput() anyways, to 481 * make sure we use data item pointed to by ctlparam in 482 * correct way. the following check is made just for safety. 483 */ 484 if (dp->dom_family != sa->sa_family) 485 continue; 486 487 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) { 488 if (pr->pr_ctlinput != NULL) 489 (*pr->pr_ctlinput)(cmd, sa, ctlparam); 490 } 491 } 492 } 493 494 void 495 pfslowtimo(void *arg) 496 { 497 struct domain *dp; 498 const struct protosw *pr; 499 500 pfslowtimo_now++; 501 502 DOMAIN_FOREACH(dp) { 503 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) 504 if (pr->pr_slowtimo) 505 (*pr->pr_slowtimo)(); 506 } 507 callout_reset(&pfslowtimo_ch, hz / 2, pfslowtimo, NULL); 508 } 509 510 void 511 pffasttimo(void *arg) 512 { 513 struct domain *dp; 514 const struct protosw *pr; 515 516 pffasttimo_now++; 517 518 DOMAIN_FOREACH(dp) { 519 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) 520 if (pr->pr_fasttimo) 521 (*pr->pr_fasttimo)(); 522 } 523 callout_reset(&pffasttimo_ch, hz / 5, pffasttimo, NULL); 524 } 525
Indexes created Thu Sep 25 02:09:54 GMT 2025