ipx_pcb.c revision 194760
1/*- 2 * Copyright (c) 1984, 1985, 1986, 1987, 1993 3 * The Regents of the University of California. 4 * Copyright (c) 2004-2006 Robert N. M. Watson 5 * 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 * 4. 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 * Copyright (c) 1995, Mike Mitchell 32 * All rights reserved. 33 * 34 * Redistribution and use in source and binary forms, with or without 35 * modification, are permitted provided that the following conditions 36 * are met: 37 * 1. Redistributions of source code must retain the above copyright 38 * notice, this list of conditions and the following disclaimer. 39 * 2. Redistributions in binary form must reproduce the above copyright 40 * notice, this list of conditions and the following disclaimer in the 41 * documentation and/or other materials provided with the distribution. 42 * 3. All advertising materials mentioning features or use of this software 43 * must display the following acknowledgement: 44 * This product includes software developed by the University of 45 * California, Berkeley and its contributors. 46 * 4. Neither the name of the University nor the names of its contributors 47 * may be used to endorse or promote products derived from this software 48 * without specific prior written permission. 49 * 50 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 51 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 52 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 53 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 54 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 55 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 56 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 57 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 58 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 59 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 60 * SUCH DAMAGE. 61 * 62 * @(#)ipx_pcb.c 63 */ 64 65#include <sys/cdefs.h> 66__FBSDID("$FreeBSD: head/sys/netipx/ipx_pcb.c 194760 2009-06-23 20:19:09Z rwatson $"); 67 68#include <sys/param.h> 69#include <sys/systm.h> 70#include <sys/malloc.h> 71#include <sys/priv.h> 72#include <sys/socket.h> 73#include <sys/socketvar.h> 74 75#include <net/if.h> 76#include <net/route.h> 77 78#include <netipx/ipx.h> 79#include <netipx/ipx_if.h> 80#include <netipx/ipx_pcb.h> 81#include <netipx/ipx_var.h> 82 83static struct ipx_addr zeroipx_addr; 84static u_short ipxpcb_lport_cache; 85 86int 87ipx_pcballoc(struct socket *so, struct ipxpcbhead *head, struct thread *td) 88{ 89 struct ipxpcb *ipxp; 90 91 KASSERT(so->so_pcb == NULL, ("ipx_pcballoc: so_pcb != NULL")); 92 IPX_LIST_LOCK_ASSERT(); 93 94 ipxp = malloc(sizeof *ipxp, M_PCB, M_NOWAIT | M_ZERO); 95 if (ipxp == NULL) 96 return (ENOBUFS); 97 IPX_LOCK_INIT(ipxp); 98 ipxp->ipxp_socket = so; 99 if (ipxcksum) 100 ipxp->ipxp_flags |= IPXP_CHECKSUM; 101 LIST_INSERT_HEAD(head, ipxp, ipxp_list); 102 so->so_pcb = (caddr_t)ipxp; 103 return (0); 104} 105 106int 107ipx_pcbbind(struct ipxpcb *ipxp, struct sockaddr *nam, struct thread *td) 108{ 109 struct sockaddr_ipx *sipx; 110 u_short lport = 0; 111 112 IPX_LIST_LOCK_ASSERT(); 113 IPX_LOCK_ASSERT(ipxp); 114 115 if (ipxp->ipxp_lport || !ipx_nullhost(ipxp->ipxp_laddr)) 116 return (EINVAL); 117 if (nam == NULL) 118 goto noname; 119 sipx = (struct sockaddr_ipx *)nam; 120 if (!ipx_nullhost(sipx->sipx_addr)) { 121 int tport = sipx->sipx_port; 122 123 sipx->sipx_port = 0; /* yech... */ 124 if (ifa_ifwithaddr_check((struct sockaddr *)sipx) == 0) 125 return (EADDRNOTAVAIL); 126 sipx->sipx_port = tport; 127 } 128 lport = sipx->sipx_port; 129 if (lport) { 130 u_short aport = ntohs(lport); 131 132 if (aport < IPXPORT_RESERVED && td != NULL && 133 priv_check(td, PRIV_NETIPX_RESERVEDPORT)) 134 return (EACCES); 135 if (ipx_pcblookup(&zeroipx_addr, lport, 0)) 136 return (EADDRINUSE); 137 } 138 ipxp->ipxp_laddr = sipx->sipx_addr; 139noname: 140 if (lport == 0) 141 do { 142 ipxpcb_lport_cache++; 143 if ((ipxpcb_lport_cache < IPXPORT_RESERVED) || 144 (ipxpcb_lport_cache >= IPXPORT_WELLKNOWN)) 145 ipxpcb_lport_cache = IPXPORT_RESERVED; 146 lport = htons(ipxpcb_lport_cache); 147 } while (ipx_pcblookup(&zeroipx_addr, lport, 0)); 148 ipxp->ipxp_lport = lport; 149 return (0); 150} 151 152/* 153 * Connect from a socket to a specified address. 154 * Both address and port must be specified in argument sipx. 155 * If don't have a local address for this socket yet, 156 * then pick one. 157 */ 158int 159ipx_pcbconnect(struct ipxpcb *ipxp, struct sockaddr *nam, struct thread *td) 160{ 161 struct sockaddr_ipx *sipx = (struct sockaddr_ipx *)nam; 162 struct ipx_addr *dst; 163 struct route *ro; 164 struct ifnet *ifp; 165 166 IPX_LIST_LOCK_ASSERT(); 167 IPX_LOCK_ASSERT(ipxp); 168 169 if (sipx->sipx_family != AF_IPX) 170 return (EAFNOSUPPORT); 171 if (sipx->sipx_port == 0 || ipx_nullhost(sipx->sipx_addr)) 172 return (EADDRNOTAVAIL); 173 /* 174 * If we haven't bound which network number to use as ours, 175 * we will use the number of the outgoing interface. 176 * This depends on having done a routing lookup, which 177 * we will probably have to do anyway, so we might 178 * as well do it now. On the other hand if we are 179 * sending to multiple destinations we may have already 180 * done the lookup, so see if we can use the route 181 * from before. In any case, we only 182 * chose a port number once, even if sending to multiple 183 * destinations. 184 */ 185 ro = &ipxp->ipxp_route; 186 dst = &satoipx_addr(ro->ro_dst); 187 if (ipxp->ipxp_socket->so_options & SO_DONTROUTE) 188 goto flush; 189 if (!ipx_neteq(ipxp->ipxp_lastdst, sipx->sipx_addr)) 190 goto flush; 191 if (!ipx_hosteq(ipxp->ipxp_lastdst, sipx->sipx_addr)) { 192 if (ro->ro_rt != NULL && !(ro->ro_rt->rt_flags & RTF_HOST)) { 193 /* can patch route to avoid rtalloc */ 194 *dst = sipx->sipx_addr; 195 } else { 196 flush: 197 if (ro->ro_rt != NULL) 198 RTFREE(ro->ro_rt); 199 ro->ro_rt = NULL; 200 } 201 }/* else cached route is ok; do nothing */ 202 ipxp->ipxp_lastdst = sipx->sipx_addr; 203 if ((ipxp->ipxp_socket->so_options & SO_DONTROUTE) == 0 && /*XXX*/ 204 (ro->ro_rt == NULL || ro->ro_rt->rt_ifp == NULL)) { 205 /* No route yet, so try to acquire one */ 206 ro->ro_dst.sa_family = AF_IPX; 207 ro->ro_dst.sa_len = sizeof(ro->ro_dst); 208 *dst = sipx->sipx_addr; 209 dst->x_port = 0; 210 rtalloc_ign(ro, 0); 211 } 212 if (ipx_neteqnn(ipxp->ipxp_laddr.x_net, ipx_zeronet)) { 213 struct ipx_ifaddr *ia = NULL; 214 215 /* 216 * If route is known or can be allocated now, 217 * our src addr is taken from the i/f, else punt. 218 */ 219 220 /* 221 * If we found a route, use the address 222 * corresponding to the outgoing interface 223 */ 224 if (ro->ro_rt != NULL && (ifp = ro->ro_rt->rt_ifp) != NULL) { 225 IPX_IFADDR_RLOCK(); 226 for (ia = ipx_ifaddr; ia != NULL; ia = ia->ia_next) 227 if (ia->ia_ifp == ifp) { 228 ifa_ref(&ia->ia_ifa); 229 break; 230 } 231 IPX_IFADDR_RUNLOCK(); 232 } 233 if (ia == NULL) { 234 u_short fport = sipx->sipx_addr.x_port; 235 sipx->sipx_addr.x_port = 0; 236 ia = (struct ipx_ifaddr *) 237 ifa_ifwithdstaddr((struct sockaddr *)sipx); 238 sipx->sipx_addr.x_port = fport; 239 if (ia == NULL) { 240 IPX_IFADDR_RLOCK(); 241 ia = ipx_iaonnetof(&sipx->sipx_addr); 242 if (ia != NULL) 243 ifa_ref(&ia->ia_ifa); 244 IPX_IFADDR_RUNLOCK(); 245 } 246 if (ia == NULL) { 247 IPX_IFADDR_RLOCK(); 248 ia = ipx_ifaddr; 249 if (ia != NULL) 250 ifa_ref(&ia->ia_ifa); 251 IPX_IFADDR_RUNLOCK(); 252 } 253 if (ia == NULL) 254 return (EADDRNOTAVAIL); 255 } 256 ipxp->ipxp_laddr.x_net = satoipx_addr(ia->ia_addr).x_net; 257 ifa_free(&ia->ia_ifa); 258 } 259 if (ipx_nullhost(ipxp->ipxp_laddr)) { 260 struct ipx_ifaddr *ia = NULL; 261 /* 262 * If route is known or can be allocated now, 263 * our src addr is taken from the i/f, else punt. 264 */ 265 266 /* 267 * If we found a route, use the address 268 * corresponding to the outgoing interface 269 */ 270 if (ro->ro_rt != NULL && (ifp = ro->ro_rt->rt_ifp) != NULL) { 271 IPX_IFADDR_RLOCK(); 272 for (ia = ipx_ifaddr; ia != NULL; ia = ia->ia_next) 273 if (ia->ia_ifp == ifp) { 274 ifa_ref(&ia->ia_ifa); 275 break; 276 } 277 IPX_IFADDR_RUNLOCK(); 278 } 279 if (ia == NULL) { 280 u_short fport = sipx->sipx_addr.x_port; 281 sipx->sipx_addr.x_port = 0; 282 ia = (struct ipx_ifaddr *) 283 ifa_ifwithdstaddr((struct sockaddr *)sipx); 284 sipx->sipx_addr.x_port = fport; 285 if (ia == NULL) { 286 IPX_IFADDR_RLOCK(); 287 ia = ipx_iaonnetof(&sipx->sipx_addr); 288 if (ia != NULL) 289 ifa_ref(&ia->ia_ifa); 290 IPX_IFADDR_RUNLOCK(); 291 } 292 if (ia == NULL) { 293 IPX_IFADDR_RLOCK(); 294 ia = ipx_ifaddr; 295 if (ia != NULL) 296 ifa_ref(&ia->ia_ifa); 297 IPX_IFADDR_RUNLOCK(); 298 } 299 if (ia == NULL) 300 return (EADDRNOTAVAIL); 301 } 302 ipxp->ipxp_laddr.x_host = satoipx_addr(ia->ia_addr).x_host; 303 ifa_free(&ia->ia_ifa); 304 } 305 if (ipx_pcblookup(&sipx->sipx_addr, ipxp->ipxp_lport, 0)) 306 return (EADDRINUSE); 307 if (ipxp->ipxp_lport == 0) 308 ipx_pcbbind(ipxp, (struct sockaddr *)NULL, td); 309 310 /* XXX just leave it zero if we can't find a route */ 311 312 ipxp->ipxp_faddr = sipx->sipx_addr; 313 /* Includes ipxp->ipxp_fport = sipx->sipx_port; */ 314 return (0); 315} 316 317void 318ipx_pcbdisconnect(struct ipxpcb *ipxp) 319{ 320 321 IPX_LIST_LOCK_ASSERT(); 322 IPX_LOCK_ASSERT(ipxp); 323 324 ipxp->ipxp_faddr = zeroipx_addr; 325} 326 327void 328ipx_pcbdetach(struct ipxpcb *ipxp) 329{ 330 struct socket *so = ipxp->ipxp_socket; 331 332 IPX_LIST_LOCK_ASSERT(); 333 IPX_LOCK_ASSERT(ipxp); 334 335 so->so_pcb = NULL; 336 ipxp->ipxp_socket = NULL; 337} 338 339void 340ipx_pcbfree(struct ipxpcb *ipxp) 341{ 342 343 KASSERT(ipxp->ipxp_socket == NULL, 344 ("ipx_pcbfree: ipxp_socket != NULL")); 345 IPX_LIST_LOCK_ASSERT(); 346 IPX_LOCK_ASSERT(ipxp); 347 348 if (ipxp->ipxp_route.ro_rt != NULL) 349 RTFREE(ipxp->ipxp_route.ro_rt); 350 LIST_REMOVE(ipxp, ipxp_list); 351 IPX_LOCK_DESTROY(ipxp); 352 free(ipxp, M_PCB); 353} 354 355void 356ipx_getsockaddr(struct ipxpcb *ipxp, struct sockaddr **nam) 357{ 358 struct sockaddr_ipx *sipx, ssipx; 359 360 sipx = &ssipx; 361 bzero((caddr_t)sipx, sizeof(*sipx)); 362 sipx->sipx_len = sizeof(*sipx); 363 sipx->sipx_family = AF_IPX; 364 IPX_LOCK(ipxp); 365 sipx->sipx_addr = ipxp->ipxp_laddr; 366 IPX_UNLOCK(ipxp); 367 *nam = sodupsockaddr((struct sockaddr *)sipx, M_WAITOK); 368} 369 370void 371ipx_getpeeraddr(struct ipxpcb *ipxp, struct sockaddr **nam) 372{ 373 struct sockaddr_ipx *sipx, ssipx; 374 375 sipx = &ssipx; 376 bzero(sipx, sizeof(*sipx)); 377 sipx->sipx_len = sizeof(*sipx); 378 sipx->sipx_family = AF_IPX; 379 IPX_LOCK(ipxp); 380 sipx->sipx_addr = ipxp->ipxp_faddr; 381 IPX_UNLOCK(ipxp); 382 *nam = sodupsockaddr((struct sockaddr *)sipx, M_WAITOK); 383} 384 385struct ipxpcb * 386ipx_pcblookup(struct ipx_addr *faddr, u_short lport, int wildp) 387{ 388 struct ipxpcb *ipxp, *match = NULL; 389 int matchwild = 3, wildcard; 390 u_short fport; 391 392 IPX_LIST_LOCK_ASSERT(); 393 394 fport = faddr->x_port; 395 LIST_FOREACH(ipxp, &ipxpcb_list, ipxp_list) { 396 if (ipxp->ipxp_lport != lport) 397 continue; 398 wildcard = 0; 399 if (ipx_nullhost(ipxp->ipxp_faddr)) { 400 if (!ipx_nullhost(*faddr)) 401 wildcard++; 402 } else { 403 if (ipx_nullhost(*faddr)) 404 wildcard++; 405 else { 406 if (!ipx_hosteq(ipxp->ipxp_faddr, *faddr)) 407 continue; 408 if (ipxp->ipxp_fport != fport) { 409 if (ipxp->ipxp_fport != 0) 410 continue; 411 else 412 wildcard++; 413 } 414 } 415 } 416 if (wildcard && wildp == 0) 417 continue; 418 if (wildcard < matchwild) { 419 match = ipxp; 420 matchwild = wildcard; 421 if (wildcard == 0) 422 break; 423 } 424 } 425 return (match); 426} 427