uipc_syscalls.c revision 1.33
1 /* $NetBSD: uipc_syscalls.c,v 1.33 1998/07/29 02:07:19 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1982, 1986, 1989, 1990, 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)uipc_syscalls.c 8.6 (Berkeley) 2/14/95 36 */ 37 38 #include "opt_ktrace.h" 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/filedesc.h> 43 #include <sys/proc.h> 44 #include <sys/file.h> 45 #include <sys/buf.h> 46 #include <sys/malloc.h> 47 #include <sys/mbuf.h> 48 #include <sys/protosw.h> 49 #include <sys/socket.h> 50 #include <sys/socketvar.h> 51 #include <sys/signalvar.h> 52 #include <sys/un.h> 53 #ifdef KTRACE 54 #include <sys/ktrace.h> 55 #endif 56 57 #include <sys/mount.h> 58 #include <sys/syscallargs.h> 59 60 /* 61 * System call interface to the socket abstraction. 62 */ 63 extern struct fileops socketops; 64 65 int 66 sys_socket(p, v, retval) 67 struct proc *p; 68 void *v; 69 register_t *retval; 70 { 71 register struct sys_socket_args /* { 72 syscallarg(int) domain; 73 syscallarg(int) type; 74 syscallarg(int) protocol; 75 } */ *uap = v; 76 struct filedesc *fdp = p->p_fd; 77 struct socket *so; 78 struct file *fp; 79 int fd, error; 80 81 if ((error = falloc(p, &fp, &fd)) != 0) 82 return (error); 83 fp->f_flag = FREAD|FWRITE; 84 fp->f_type = DTYPE_SOCKET; 85 fp->f_ops = &socketops; 86 error = socreate(SCARG(uap, domain), &so, SCARG(uap, type), 87 SCARG(uap, protocol)); 88 if (error) { 89 fdp->fd_ofiles[fd] = 0; 90 ffree(fp); 91 } else { 92 fp->f_data = (caddr_t)so; 93 *retval = fd; 94 } 95 return (error); 96 } 97 98 /* ARGSUSED */ 99 int 100 sys_bind(p, v, retval) 101 struct proc *p; 102 void *v; 103 register_t *retval; 104 { 105 register struct sys_bind_args /* { 106 syscallarg(int) s; 107 syscallarg(const struct sockaddr *) name; 108 syscallarg(int) namelen; 109 } */ *uap = v; 110 struct file *fp; 111 struct mbuf *nam; 112 int error; 113 114 if ((error = getsock(p->p_fd, SCARG(uap, s), &fp)) != 0) 115 return (error); 116 error = sockargs(&nam, SCARG(uap, name), SCARG(uap, namelen), 117 MT_SONAME); 118 if (error) 119 return (error); 120 error = sobind((struct socket *)fp->f_data, nam); 121 m_freem(nam); 122 return (error); 123 } 124 125 /* ARGSUSED */ 126 int 127 sys_listen(p, v, retval) 128 struct proc *p; 129 void *v; 130 register_t *retval; 131 { 132 register struct sys_listen_args /* { 133 syscallarg(int) s; 134 syscallarg(int) backlog; 135 } */ *uap = v; 136 struct file *fp; 137 int error; 138 139 if ((error = getsock(p->p_fd, SCARG(uap, s), &fp)) != 0) 140 return (error); 141 return (solisten((struct socket *)fp->f_data, SCARG(uap, backlog))); 142 } 143 144 int 145 sys_accept(p, v, retval) 146 struct proc *p; 147 void *v; 148 register_t *retval; 149 { 150 register struct sys_accept_args /* { 151 syscallarg(int) s; 152 syscallarg(struct sockaddr *) name; 153 syscallarg(int *) anamelen; 154 } */ *uap = v; 155 struct file *fp; 156 struct mbuf *nam; 157 int namelen, error, s, tmpfd; 158 register struct socket *so; 159 160 if (SCARG(uap, name) && (error = copyin((caddr_t)SCARG(uap, anamelen), 161 (caddr_t)&namelen, sizeof (namelen)))) 162 return (error); 163 if ((error = getsock(p->p_fd, SCARG(uap, s), &fp)) != 0) 164 return (error); 165 s = splsoftnet(); 166 so = (struct socket *)fp->f_data; 167 if ((so->so_options & SO_ACCEPTCONN) == 0) { 168 splx(s); 169 return (EINVAL); 170 } 171 if ((so->so_state & SS_NBIO) && so->so_qlen == 0) { 172 splx(s); 173 return (EWOULDBLOCK); 174 } 175 while (so->so_qlen == 0 && so->so_error == 0) { 176 if (so->so_state & SS_CANTRCVMORE) { 177 so->so_error = ECONNABORTED; 178 break; 179 } 180 error = tsleep((caddr_t)&so->so_timeo, PSOCK | PCATCH, 181 netcon, 0); 182 if (error) { 183 splx(s); 184 return (error); 185 } 186 } 187 if (so->so_error) { 188 error = so->so_error; 189 so->so_error = 0; 190 splx(s); 191 return (error); 192 } 193 if ((error = falloc(p, &fp, &tmpfd)) != 0) { 194 splx(s); 195 return (error); 196 } 197 *retval = tmpfd; 198 { struct socket *aso = so->so_q.tqh_first; 199 if (soqremque(aso, 1) == 0) 200 panic("accept"); 201 so = aso; 202 } 203 fp->f_type = DTYPE_SOCKET; 204 fp->f_flag = FREAD|FWRITE; 205 fp->f_ops = &socketops; 206 fp->f_data = (caddr_t)so; 207 nam = m_get(M_WAIT, MT_SONAME); 208 (void) soaccept(so, nam); 209 if (SCARG(uap, name)) { 210 if (namelen > nam->m_len) 211 namelen = nam->m_len; 212 /* SHOULD COPY OUT A CHAIN HERE */ 213 if ((error = copyout(mtod(nam, caddr_t), 214 (caddr_t)SCARG(uap, name), (u_int)namelen)) == 0) 215 error = copyout((caddr_t)&namelen, 216 (caddr_t)SCARG(uap, anamelen), 217 sizeof (*SCARG(uap, anamelen))); 218 } 219 m_freem(nam); 220 splx(s); 221 return (error); 222 } 223 224 /* ARGSUSED */ 225 int 226 sys_connect(p, v, retval) 227 struct proc *p; 228 void *v; 229 register_t *retval; 230 { 231 register struct sys_connect_args /* { 232 syscallarg(int) s; 233 syscallarg(const struct sockaddr *) name; 234 syscallarg(int) namelen; 235 } */ *uap = v; 236 struct file *fp; 237 register struct socket *so; 238 struct mbuf *nam; 239 int error, s; 240 241 if ((error = getsock(p->p_fd, SCARG(uap, s), &fp)) != 0) 242 return (error); 243 so = (struct socket *)fp->f_data; 244 if ((so->so_state & SS_NBIO) && (so->so_state & SS_ISCONNECTING)) 245 return (EALREADY); 246 error = sockargs(&nam, SCARG(uap, name), SCARG(uap, namelen), 247 MT_SONAME); 248 if (error) 249 return (error); 250 error = soconnect(so, nam); 251 if (error) 252 goto bad; 253 if ((so->so_state & SS_NBIO) && (so->so_state & SS_ISCONNECTING)) { 254 m_freem(nam); 255 return (EINPROGRESS); 256 } 257 s = splsoftnet(); 258 while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) { 259 error = tsleep((caddr_t)&so->so_timeo, PSOCK | PCATCH, 260 netcon, 0); 261 if (error) 262 break; 263 } 264 if (error == 0) { 265 error = so->so_error; 266 so->so_error = 0; 267 } 268 splx(s); 269 bad: 270 so->so_state &= ~SS_ISCONNECTING; 271 m_freem(nam); 272 if (error == ERESTART) 273 error = EINTR; 274 return (error); 275 } 276 277 int 278 sys_socketpair(p, v, retval) 279 struct proc *p; 280 void *v; 281 register_t *retval; 282 { 283 register struct sys_socketpair_args /* { 284 syscallarg(int) domain; 285 syscallarg(int) type; 286 syscallarg(int) protocol; 287 syscallarg(int *) rsv; 288 } */ *uap = v; 289 register struct filedesc *fdp = p->p_fd; 290 struct file *fp1, *fp2; 291 struct socket *so1, *so2; 292 int fd, error, sv[2]; 293 294 error = socreate(SCARG(uap, domain), &so1, SCARG(uap, type), 295 SCARG(uap, protocol)); 296 if (error) 297 return (error); 298 error = socreate(SCARG(uap, domain), &so2, SCARG(uap, type), 299 SCARG(uap, protocol)); 300 if (error) 301 goto free1; 302 if ((error = falloc(p, &fp1, &fd)) != 0) 303 goto free2; 304 sv[0] = fd; 305 fp1->f_flag = FREAD|FWRITE; 306 fp1->f_type = DTYPE_SOCKET; 307 fp1->f_ops = &socketops; 308 fp1->f_data = (caddr_t)so1; 309 if ((error = falloc(p, &fp2, &fd)) != 0) 310 goto free3; 311 fp2->f_flag = FREAD|FWRITE; 312 fp2->f_type = DTYPE_SOCKET; 313 fp2->f_ops = &socketops; 314 fp2->f_data = (caddr_t)so2; 315 sv[1] = fd; 316 if ((error = soconnect2(so1, so2)) != 0) 317 goto free4; 318 if (SCARG(uap, type) == SOCK_DGRAM) { 319 /* 320 * Datagram socket connection is asymmetric. 321 */ 322 if ((error = soconnect2(so2, so1)) != 0) 323 goto free4; 324 } 325 error = copyout((caddr_t)sv, (caddr_t)SCARG(uap, rsv), 326 2 * sizeof (int)); 327 return (error); 328 free4: 329 ffree(fp2); 330 fdp->fd_ofiles[sv[1]] = 0; 331 free3: 332 ffree(fp1); 333 fdp->fd_ofiles[sv[0]] = 0; 334 free2: 335 (void)soclose(so2); 336 free1: 337 (void)soclose(so1); 338 return (error); 339 } 340 341 int 342 sys_sendto(p, v, retval) 343 struct proc *p; 344 void *v; 345 register_t *retval; 346 { 347 register struct sys_sendto_args /* { 348 syscallarg(int) s; 349 syscallarg(const void *) buf; 350 syscallarg(size_t) len; 351 syscallarg(int) flags; 352 syscallarg(const struct sockaddr *) to; 353 syscallarg(int) tolen; 354 } */ *uap = v; 355 struct msghdr msg; 356 struct iovec aiov; 357 358 msg.msg_name = (caddr_t)SCARG(uap, to); /* XXX kills const */ 359 msg.msg_namelen = SCARG(uap, tolen); 360 msg.msg_iov = &aiov; 361 msg.msg_iovlen = 1; 362 msg.msg_control = 0; 363 #ifdef COMPAT_OLDSOCK 364 msg.msg_flags = 0; 365 #endif 366 aiov.iov_base = (char *)SCARG(uap, buf); /* XXX kills const */ 367 aiov.iov_len = SCARG(uap, len); 368 return (sendit(p, SCARG(uap, s), &msg, SCARG(uap, flags), retval)); 369 } 370 371 int 372 sys_sendmsg(p, v, retval) 373 struct proc *p; 374 void *v; 375 register_t *retval; 376 { 377 register struct sys_sendmsg_args /* { 378 syscallarg(int) s; 379 syscallarg(const struct msghdr *) msg; 380 syscallarg(int) flags; 381 } */ *uap = v; 382 struct msghdr msg; 383 struct iovec aiov[UIO_SMALLIOV], *iov; 384 int error; 385 386 error = copyin(SCARG(uap, msg), (caddr_t)&msg, sizeof (msg)); 387 if (error) 388 return (error); 389 if ((u_int)msg.msg_iovlen >= UIO_SMALLIOV) { 390 if ((u_int)msg.msg_iovlen >= UIO_MAXIOV) 391 return (EMSGSIZE); 392 MALLOC(iov, struct iovec *, 393 sizeof(struct iovec) * (u_int)msg.msg_iovlen, M_IOV, 394 M_WAITOK); 395 } else 396 iov = aiov; 397 if (msg.msg_iovlen && 398 (error = copyin((caddr_t)msg.msg_iov, (caddr_t)iov, 399 (unsigned)(msg.msg_iovlen * sizeof (struct iovec))))) 400 goto done; 401 msg.msg_iov = iov; 402 #ifdef COMPAT_OLDSOCK 403 msg.msg_flags = 0; 404 #endif 405 error = sendit(p, SCARG(uap, s), &msg, SCARG(uap, flags), retval); 406 done: 407 if (iov != aiov) 408 FREE(iov, M_IOV); 409 return (error); 410 } 411 412 int 413 sendit(p, s, mp, flags, retsize) 414 register struct proc *p; 415 int s; 416 register struct msghdr *mp; 417 int flags; 418 register_t *retsize; 419 { 420 struct file *fp; 421 struct uio auio; 422 register struct iovec *iov; 423 register int i; 424 struct mbuf *to, *control; 425 int len, error; 426 struct socket *so; 427 #ifdef KTRACE 428 struct iovec *ktriov = NULL; 429 #endif 430 431 if ((error = getsock(p->p_fd, s, &fp)) != 0) 432 return (error); 433 auio.uio_iov = mp->msg_iov; 434 auio.uio_iovcnt = mp->msg_iovlen; 435 auio.uio_segflg = UIO_USERSPACE; 436 auio.uio_rw = UIO_WRITE; 437 auio.uio_procp = p; 438 auio.uio_offset = 0; /* XXX */ 439 auio.uio_resid = 0; 440 iov = mp->msg_iov; 441 for (i = 0; i < mp->msg_iovlen; i++, iov++) { 442 #if 0 443 /* cannot happen; iov_len is unsigned */ 444 if (iov->iov_len < 0) 445 return (EINVAL); 446 #endif 447 /* 448 * Writes return ssize_t because -1 is returned on error. 449 * Therefore, we must restrict the length to SSIZE_MAX to 450 * avoid garbage return values. 451 */ 452 auio.uio_resid += iov->iov_len; 453 if (iov->iov_len > SSIZE_MAX || auio.uio_resid > SSIZE_MAX) 454 return (EINVAL); 455 } 456 if (mp->msg_name) { 457 error = sockargs(&to, mp->msg_name, mp->msg_namelen, 458 MT_SONAME); 459 if (error) 460 return (error); 461 } else 462 to = 0; 463 if (mp->msg_control) { 464 if (mp->msg_controllen < sizeof(struct cmsghdr) 465 #ifdef COMPAT_OLDSOCK 466 && mp->msg_flags != MSG_COMPAT 467 #endif 468 ) { 469 error = EINVAL; 470 goto bad; 471 } 472 error = sockargs(&control, mp->msg_control, 473 mp->msg_controllen, MT_CONTROL); 474 if (error) 475 goto bad; 476 #ifdef COMPAT_OLDSOCK 477 if (mp->msg_flags == MSG_COMPAT) { 478 register struct cmsghdr *cm; 479 480 M_PREPEND(control, sizeof(*cm), M_WAIT); 481 if (control == 0) { 482 error = ENOBUFS; 483 goto bad; 484 } else { 485 cm = mtod(control, struct cmsghdr *); 486 cm->cmsg_len = control->m_len; 487 cm->cmsg_level = SOL_SOCKET; 488 cm->cmsg_type = SCM_RIGHTS; 489 } 490 } 491 #endif 492 } else 493 control = 0; 494 #ifdef KTRACE 495 if (KTRPOINT(p, KTR_GENIO)) { 496 int iovlen = auio.uio_iovcnt * sizeof (struct iovec); 497 498 MALLOC(ktriov, struct iovec *, iovlen, M_TEMP, M_WAITOK); 499 bcopy((caddr_t)auio.uio_iov, (caddr_t)ktriov, iovlen); 500 } 501 #endif 502 len = auio.uio_resid; 503 so = (struct socket *)fp->f_data; 504 error = (*so->so_send)(so, to, &auio, NULL, control, flags); 505 if (error) { 506 if (auio.uio_resid != len && (error == ERESTART || 507 error == EINTR || error == EWOULDBLOCK)) 508 error = 0; 509 if (error == EPIPE) 510 psignal(p, SIGPIPE); 511 } 512 if (error == 0) 513 *retsize = len - auio.uio_resid; 514 #ifdef KTRACE 515 if (ktriov != NULL) { 516 if (error == 0) 517 ktrgenio(p->p_tracep, s, UIO_WRITE, 518 ktriov, *retsize, error); 519 FREE(ktriov, M_TEMP); 520 } 521 #endif 522 bad: 523 if (to) 524 m_freem(to); 525 return (error); 526 } 527 528 int 529 sys_recvfrom(p, v, retval) 530 struct proc *p; 531 void *v; 532 register_t *retval; 533 { 534 register struct sys_recvfrom_args /* { 535 syscallarg(int) s; 536 syscallarg(void *) buf; 537 syscallarg(size_t) len; 538 syscallarg(int) flags; 539 syscallarg(struct sockaddr *) from; 540 syscallarg(int *) fromlenaddr; 541 } */ *uap = v; 542 struct msghdr msg; 543 struct iovec aiov; 544 int error; 545 546 if (SCARG(uap, fromlenaddr)) { 547 error = copyin((caddr_t)SCARG(uap, fromlenaddr), 548 (caddr_t)&msg.msg_namelen, 549 sizeof (msg.msg_namelen)); 550 if (error) 551 return (error); 552 } else 553 msg.msg_namelen = 0; 554 msg.msg_name = (caddr_t)SCARG(uap, from); 555 msg.msg_iov = &aiov; 556 msg.msg_iovlen = 1; 557 aiov.iov_base = SCARG(uap, buf); 558 aiov.iov_len = SCARG(uap, len); 559 msg.msg_control = 0; 560 msg.msg_flags = SCARG(uap, flags); 561 return (recvit(p, SCARG(uap, s), &msg, 562 (caddr_t)SCARG(uap, fromlenaddr), retval)); 563 } 564 565 int 566 sys_recvmsg(p, v, retval) 567 struct proc *p; 568 void *v; 569 register_t *retval; 570 { 571 register struct sys_recvmsg_args /* { 572 syscallarg(int) s; 573 syscallarg(struct msghdr *) msg; 574 syscallarg(int) flags; 575 } */ *uap = v; 576 struct msghdr msg; 577 struct iovec aiov[UIO_SMALLIOV], *uiov, *iov; 578 register int error; 579 580 error = copyin((caddr_t)SCARG(uap, msg), (caddr_t)&msg, 581 sizeof (msg)); 582 if (error) 583 return (error); 584 if ((u_int)msg.msg_iovlen >= UIO_SMALLIOV) { 585 if ((u_int)msg.msg_iovlen >= UIO_MAXIOV) 586 return (EMSGSIZE); 587 MALLOC(iov, struct iovec *, 588 sizeof(struct iovec) * (u_int)msg.msg_iovlen, M_IOV, 589 M_WAITOK); 590 } else 591 iov = aiov; 592 #ifdef COMPAT_OLDSOCK 593 msg.msg_flags = SCARG(uap, flags) &~ MSG_COMPAT; 594 #else 595 msg.msg_flags = SCARG(uap, flags); 596 #endif 597 uiov = msg.msg_iov; 598 msg.msg_iov = iov; 599 error = copyin((caddr_t)uiov, (caddr_t)iov, 600 (unsigned)(msg.msg_iovlen * sizeof (struct iovec))); 601 if (error) 602 goto done; 603 if ((error = recvit(p, SCARG(uap, s), &msg, (caddr_t)0, retval)) == 0) { 604 msg.msg_iov = uiov; 605 error = copyout((caddr_t)&msg, (caddr_t)SCARG(uap, msg), 606 sizeof(msg)); 607 } 608 done: 609 if (iov != aiov) 610 FREE(iov, M_IOV); 611 return (error); 612 } 613 614 int 615 recvit(p, s, mp, namelenp, retsize) 616 register struct proc *p; 617 int s; 618 register struct msghdr *mp; 619 caddr_t namelenp; 620 register_t *retsize; 621 { 622 struct file *fp; 623 struct uio auio; 624 register struct iovec *iov; 625 register int i; 626 int len, error; 627 struct mbuf *from = 0, *control = 0; 628 struct socket *so; 629 #ifdef KTRACE 630 struct iovec *ktriov = NULL; 631 #endif 632 633 if ((error = getsock(p->p_fd, s, &fp)) != 0) 634 return (error); 635 auio.uio_iov = mp->msg_iov; 636 auio.uio_iovcnt = mp->msg_iovlen; 637 auio.uio_segflg = UIO_USERSPACE; 638 auio.uio_rw = UIO_READ; 639 auio.uio_procp = p; 640 auio.uio_offset = 0; /* XXX */ 641 auio.uio_resid = 0; 642 iov = mp->msg_iov; 643 for (i = 0; i < mp->msg_iovlen; i++, iov++) { 644 #if 0 645 /* cannot happen iov_len is unsigned */ 646 if (iov->iov_len < 0) 647 return (EINVAL); 648 #endif 649 /* 650 * Reads return ssize_t because -1 is returned on error. 651 * Therefore we must restrict the length to SSIZE_MAX to 652 * avoid garbage return values. 653 */ 654 auio.uio_resid += iov->iov_len; 655 if (iov->iov_len > SSIZE_MAX || auio.uio_resid > SSIZE_MAX) 656 return (EINVAL); 657 } 658 #ifdef KTRACE 659 if (KTRPOINT(p, KTR_GENIO)) { 660 int iovlen = auio.uio_iovcnt * sizeof (struct iovec); 661 662 MALLOC(ktriov, struct iovec *, iovlen, M_TEMP, M_WAITOK); 663 bcopy((caddr_t)auio.uio_iov, (caddr_t)ktriov, iovlen); 664 } 665 #endif 666 len = auio.uio_resid; 667 so = (struct socket *)fp->f_data; 668 error = (*so->so_receive)(so, &from, &auio, NULL, 669 mp->msg_control ? &control : NULL, &mp->msg_flags); 670 if (error) { 671 if (auio.uio_resid != len && (error == ERESTART || 672 error == EINTR || error == EWOULDBLOCK)) 673 error = 0; 674 } 675 #ifdef KTRACE 676 if (ktriov != NULL) { 677 if (error == 0) 678 ktrgenio(p->p_tracep, s, UIO_READ, 679 ktriov, len - auio.uio_resid, error); 680 FREE(ktriov, M_TEMP); 681 } 682 #endif 683 if (error) 684 goto out; 685 *retsize = len - auio.uio_resid; 686 if (mp->msg_name) { 687 len = mp->msg_namelen; 688 if (len <= 0 || from == 0) 689 len = 0; 690 else { 691 #ifdef COMPAT_OLDSOCK 692 if (mp->msg_flags & MSG_COMPAT) 693 mtod(from, struct osockaddr *)->sa_family = 694 mtod(from, struct sockaddr *)->sa_family; 695 #endif 696 if (len > from->m_len) 697 len = from->m_len; 698 /* else if len < from->m_len ??? */ 699 error = copyout(mtod(from, caddr_t), 700 (caddr_t)mp->msg_name, (unsigned)len); 701 if (error) 702 goto out; 703 } 704 mp->msg_namelen = len; 705 if (namelenp && 706 (error = copyout((caddr_t)&len, namelenp, sizeof (int)))) { 707 #ifdef COMPAT_OLDSOCK 708 if (mp->msg_flags & MSG_COMPAT) 709 error = 0; /* old recvfrom didn't check */ 710 else 711 #endif 712 goto out; 713 } 714 } 715 if (mp->msg_control) { 716 #ifdef COMPAT_OLDSOCK 717 /* 718 * We assume that old recvmsg calls won't receive access 719 * rights and other control info, esp. as control info 720 * is always optional and those options didn't exist in 4.3. 721 * If we receive rights, trim the cmsghdr; anything else 722 * is tossed. 723 */ 724 if (control && mp->msg_flags & MSG_COMPAT) { 725 if (mtod(control, struct cmsghdr *)->cmsg_level != 726 SOL_SOCKET || 727 mtod(control, struct cmsghdr *)->cmsg_type != 728 SCM_RIGHTS) { 729 mp->msg_controllen = 0; 730 goto out; 731 } 732 control->m_len -= sizeof (struct cmsghdr); 733 control->m_data += sizeof (struct cmsghdr); 734 } 735 #endif 736 len = mp->msg_controllen; 737 if (len <= 0 || control == 0) 738 len = 0; 739 else { 740 struct mbuf *m = control; 741 caddr_t p = (caddr_t)mp->msg_control; 742 743 do { 744 i = m->m_len; 745 if (len < i) { 746 mp->msg_flags |= MSG_CTRUNC; 747 i = len; 748 } 749 error = copyout(mtod(m, caddr_t), p, 750 (unsigned)i); 751 if (m->m_next) 752 i = ALIGN(i); 753 p += i; 754 len -= i; 755 if (error != 0 || len <= 0) 756 break; 757 } while ((m = m->m_next) != NULL); 758 len = p - (caddr_t)mp->msg_control; 759 } 760 mp->msg_controllen = len; 761 } 762 out: 763 if (from) 764 m_freem(from); 765 if (control) 766 m_freem(control); 767 return (error); 768 } 769 770 /* ARGSUSED */ 771 int 772 sys_shutdown(p, v, retval) 773 struct proc *p; 774 void *v; 775 register_t *retval; 776 { 777 register struct sys_shutdown_args /* { 778 syscallarg(int) s; 779 syscallarg(int) how; 780 } */ *uap = v; 781 struct file *fp; 782 int error; 783 784 if ((error = getsock(p->p_fd, SCARG(uap, s), &fp)) != 0) 785 return (error); 786 return (soshutdown((struct socket *)fp->f_data, SCARG(uap, how))); 787 } 788 789 /* ARGSUSED */ 790 int 791 sys_setsockopt(p, v, retval) 792 struct proc *p; 793 void *v; 794 register_t *retval; 795 { 796 register struct sys_setsockopt_args /* { 797 syscallarg(int) s; 798 syscallarg(int) level; 799 syscallarg(int) name; 800 syscallarg(const void *) val; 801 syscallarg(int) valsize; 802 } */ *uap = v; 803 struct file *fp; 804 struct mbuf *m = NULL; 805 int error; 806 807 if ((error = getsock(p->p_fd, SCARG(uap, s), &fp)) != 0) 808 return (error); 809 if (SCARG(uap, valsize) > MLEN) 810 return (EINVAL); 811 if (SCARG(uap, val)) { 812 m = m_get(M_WAIT, MT_SOOPTS); 813 error = copyin(SCARG(uap, val), mtod(m, caddr_t), 814 (u_int)SCARG(uap, valsize)); 815 if (error) { 816 (void) m_free(m); 817 return (error); 818 } 819 m->m_len = SCARG(uap, valsize); 820 } 821 return (sosetopt((struct socket *)fp->f_data, SCARG(uap, level), 822 SCARG(uap, name), m)); 823 } 824 825 /* ARGSUSED */ 826 int 827 sys_getsockopt(p, v, retval) 828 struct proc *p; 829 void *v; 830 register_t *retval; 831 { 832 register struct sys_getsockopt_args /* { 833 syscallarg(int) s; 834 syscallarg(int) level; 835 syscallarg(int) name; 836 syscallarg(void *) val; 837 syscallarg(int *) avalsize; 838 } */ *uap = v; 839 struct file *fp; 840 struct mbuf *m = NULL; 841 int valsize, error; 842 843 if ((error = getsock(p->p_fd, SCARG(uap, s), &fp)) != 0) 844 return (error); 845 if (SCARG(uap, val)) { 846 error = copyin((caddr_t)SCARG(uap, avalsize), 847 (caddr_t)&valsize, sizeof (valsize)); 848 if (error) 849 return (error); 850 } else 851 valsize = 0; 852 if ((error = sogetopt((struct socket *)fp->f_data, SCARG(uap, level), 853 SCARG(uap, name), &m)) == 0 && SCARG(uap, val) && valsize && 854 m != NULL) { 855 if (valsize > m->m_len) 856 valsize = m->m_len; 857 error = copyout(mtod(m, caddr_t), SCARG(uap, val), 858 (u_int)valsize); 859 if (error == 0) 860 error = copyout((caddr_t)&valsize, 861 (caddr_t)SCARG(uap, avalsize), sizeof (valsize)); 862 } 863 if (m != NULL) 864 (void) m_free(m); 865 return (error); 866 } 867 868 /* ARGSUSED */ 869 int 870 sys_pipe(p, v, retval) 871 struct proc *p; 872 void *v; 873 register_t *retval; 874 { 875 register struct filedesc *fdp = p->p_fd; 876 struct file *rf, *wf; 877 struct socket *rso, *wso; 878 int fd, error; 879 880 if ((error = socreate(AF_LOCAL, &rso, SOCK_STREAM, 0)) != 0) 881 return (error); 882 if ((error = socreate(AF_LOCAL, &wso, SOCK_STREAM, 0)) != 0) 883 goto free1; 884 if ((error = falloc(p, &rf, &fd)) != 0) 885 goto free2; 886 retval[0] = fd; 887 rf->f_flag = FREAD; 888 rf->f_type = DTYPE_SOCKET; 889 rf->f_ops = &socketops; 890 rf->f_data = (caddr_t)rso; 891 if ((error = falloc(p, &wf, &fd)) != 0) 892 goto free3; 893 wf->f_flag = FWRITE; 894 wf->f_type = DTYPE_SOCKET; 895 wf->f_ops = &socketops; 896 wf->f_data = (caddr_t)wso; 897 retval[1] = fd; 898 if ((error = unp_connect2(wso, rso)) != 0) 899 goto free4; 900 return (0); 901 free4: 902 ffree(wf); 903 fdp->fd_ofiles[retval[1]] = 0; 904 free3: 905 ffree(rf); 906 fdp->fd_ofiles[retval[0]] = 0; 907 free2: 908 (void)soclose(wso); 909 free1: 910 (void)soclose(rso); 911 return (error); 912 } 913 914 /* 915 * Get socket name. 916 */ 917 /* ARGSUSED */ 918 int 919 sys_getsockname(p, v, retval) 920 struct proc *p; 921 void *v; 922 register_t *retval; 923 { 924 register struct sys_getsockname_args /* { 925 syscallarg(int) fdes; 926 syscallarg(struct sockaddr *) asa; 927 syscallarg(int *) alen; 928 } */ *uap = v; 929 struct file *fp; 930 register struct socket *so; 931 struct mbuf *m; 932 int len, error; 933 934 if ((error = getsock(p->p_fd, SCARG(uap, fdes), &fp)) != 0) 935 return (error); 936 error = copyin((caddr_t)SCARG(uap, alen), (caddr_t)&len, sizeof (len)); 937 if (error) 938 return (error); 939 so = (struct socket *)fp->f_data; 940 m = m_getclr(M_WAIT, MT_SONAME); 941 error = (*so->so_proto->pr_usrreq)(so, PRU_SOCKADDR, (struct mbuf *)0, 942 m, (struct mbuf *)0, (struct proc *)0); 943 if (error) 944 goto bad; 945 if (len > m->m_len) 946 len = m->m_len; 947 error = copyout(mtod(m, caddr_t), (caddr_t)SCARG(uap, asa), (u_int)len); 948 if (error == 0) 949 error = copyout((caddr_t)&len, (caddr_t)SCARG(uap, alen), 950 sizeof (len)); 951 bad: 952 m_freem(m); 953 return (error); 954 } 955 956 /* 957 * Get name of peer for connected socket. 958 */ 959 /* ARGSUSED */ 960 int 961 sys_getpeername(p, v, retval) 962 struct proc *p; 963 void *v; 964 register_t *retval; 965 { 966 register struct sys_getpeername_args /* { 967 syscallarg(int) fdes; 968 syscallarg(struct sockaddr *) asa; 969 syscallarg(int *) alen; 970 } */ *uap = v; 971 struct file *fp; 972 register struct socket *so; 973 struct mbuf *m; 974 int len, error; 975 976 if ((error = getsock(p->p_fd, SCARG(uap, fdes), &fp)) != 0) 977 return (error); 978 so = (struct socket *)fp->f_data; 979 if ((so->so_state & (SS_ISCONNECTED|SS_ISCONFIRMING)) == 0) 980 return (ENOTCONN); 981 error = copyin((caddr_t)SCARG(uap, alen), (caddr_t)&len, sizeof (len)); 982 if (error) 983 return (error); 984 m = m_getclr(M_WAIT, MT_SONAME); 985 error = (*so->so_proto->pr_usrreq)(so, PRU_PEERADDR, (struct mbuf *)0, 986 m, (struct mbuf *)0, (struct proc *)0); 987 if (error) 988 goto bad; 989 if (len > m->m_len) 990 len = m->m_len; 991 error = copyout(mtod(m, caddr_t), (caddr_t)SCARG(uap, asa), (u_int)len); 992 if (error) 993 goto bad; 994 error = copyout((caddr_t)&len, (caddr_t)SCARG(uap, alen), sizeof (len)); 995 bad: 996 m_freem(m); 997 return (error); 998 } 999 1000 /* 1001 * XXX In a perfect world, we wouldn't pass around socket control 1002 * XXX arguments in mbufs, and this could go away. 1003 */ 1004 int 1005 sockargs(mp, buf, buflen, type) 1006 struct mbuf **mp; 1007 const void *buf; 1008 int buflen, type; 1009 { 1010 register struct sockaddr *sa; 1011 register struct mbuf *m; 1012 int error; 1013 1014 /* 1015 * We can't allow socket names > UCHAR_MAX in length, since that 1016 * will overflow sa_len. 1017 */ 1018 if (type == MT_SONAME && (u_int)buflen > UCHAR_MAX) 1019 return (EINVAL); 1020 1021 /* Allocate an mbuf to hold the arguments. */ 1022 m = m_get(M_WAIT, type); 1023 if ((u_int)buflen > MLEN) { 1024 /* 1025 * Won't fit into a regular mbuf, so we allocate just 1026 * enough external storage to hold the argument. 1027 */ 1028 MEXTMALLOC(m, buflen, M_WAITOK); 1029 } 1030 m->m_len = buflen; 1031 error = copyin(buf, mtod(m, caddr_t), (u_int)buflen); 1032 if (error) { 1033 (void) m_free(m); 1034 return (error); 1035 } 1036 *mp = m; 1037 if (type == MT_SONAME) { 1038 sa = mtod(m, struct sockaddr *); 1039 1040 #if defined(COMPAT_OLDSOCK) && BYTE_ORDER != BIG_ENDIAN 1041 if (sa->sa_family == 0 && sa->sa_len < AF_MAX) 1042 sa->sa_family = sa->sa_len; 1043 #endif 1044 sa->sa_len = buflen; 1045 } 1046 return (0); 1047 } 1048 1049 int 1050 getsock(fdp, fdes, fpp) 1051 struct filedesc *fdp; 1052 int fdes; 1053 struct file **fpp; 1054 { 1055 register struct file *fp; 1056 1057 if ((unsigned)fdes >= fdp->fd_nfiles || 1058 (fp = fdp->fd_ofiles[fdes]) == NULL) 1059 return (EBADF); 1060 if (fp->f_type != DTYPE_SOCKET) 1061 return (ENOTSOCK); 1062 *fpp = fp; 1063 return (0); 1064 } 1065
Indexes created Fri Sep 26 20:09:58 GMT 2025