uipc_syscalls.c revision 1.32
1 /* $NetBSD: uipc_syscalls.c,v 1.32 1998/07/18 05:04:37 lukem 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 if ((auio.uio_resid += iov->iov_len) < 0) 448 return (EINVAL); 449 } 450 if (mp->msg_name) { 451 error = sockargs(&to, mp->msg_name, mp->msg_namelen, 452 MT_SONAME); 453 if (error) 454 return (error); 455 } else 456 to = 0; 457 if (mp->msg_control) { 458 if (mp->msg_controllen < sizeof(struct cmsghdr) 459 #ifdef COMPAT_OLDSOCK 460 && mp->msg_flags != MSG_COMPAT 461 #endif 462 ) { 463 error = EINVAL; 464 goto bad; 465 } 466 error = sockargs(&control, mp->msg_control, 467 mp->msg_controllen, MT_CONTROL); 468 if (error) 469 goto bad; 470 #ifdef COMPAT_OLDSOCK 471 if (mp->msg_flags == MSG_COMPAT) { 472 register struct cmsghdr *cm; 473 474 M_PREPEND(control, sizeof(*cm), M_WAIT); 475 if (control == 0) { 476 error = ENOBUFS; 477 goto bad; 478 } else { 479 cm = mtod(control, struct cmsghdr *); 480 cm->cmsg_len = control->m_len; 481 cm->cmsg_level = SOL_SOCKET; 482 cm->cmsg_type = SCM_RIGHTS; 483 } 484 } 485 #endif 486 } else 487 control = 0; 488 #ifdef KTRACE 489 if (KTRPOINT(p, KTR_GENIO)) { 490 int iovlen = auio.uio_iovcnt * sizeof (struct iovec); 491 492 MALLOC(ktriov, struct iovec *, iovlen, M_TEMP, M_WAITOK); 493 bcopy((caddr_t)auio.uio_iov, (caddr_t)ktriov, iovlen); 494 } 495 #endif 496 len = auio.uio_resid; 497 so = (struct socket *)fp->f_data; 498 error = (*so->so_send)(so, to, &auio, NULL, control, flags); 499 if (error) { 500 if (auio.uio_resid != len && (error == ERESTART || 501 error == EINTR || error == EWOULDBLOCK)) 502 error = 0; 503 if (error == EPIPE) 504 psignal(p, SIGPIPE); 505 } 506 if (error == 0) 507 *retsize = len - auio.uio_resid; 508 #ifdef KTRACE 509 if (ktriov != NULL) { 510 if (error == 0) 511 ktrgenio(p->p_tracep, s, UIO_WRITE, 512 ktriov, *retsize, error); 513 FREE(ktriov, M_TEMP); 514 } 515 #endif 516 bad: 517 if (to) 518 m_freem(to); 519 return (error); 520 } 521 522 int 523 sys_recvfrom(p, v, retval) 524 struct proc *p; 525 void *v; 526 register_t *retval; 527 { 528 register struct sys_recvfrom_args /* { 529 syscallarg(int) s; 530 syscallarg(void *) buf; 531 syscallarg(size_t) len; 532 syscallarg(int) flags; 533 syscallarg(struct sockaddr *) from; 534 syscallarg(int *) fromlenaddr; 535 } */ *uap = v; 536 struct msghdr msg; 537 struct iovec aiov; 538 int error; 539 540 if (SCARG(uap, fromlenaddr)) { 541 error = copyin((caddr_t)SCARG(uap, fromlenaddr), 542 (caddr_t)&msg.msg_namelen, 543 sizeof (msg.msg_namelen)); 544 if (error) 545 return (error); 546 } else 547 msg.msg_namelen = 0; 548 msg.msg_name = (caddr_t)SCARG(uap, from); 549 msg.msg_iov = &aiov; 550 msg.msg_iovlen = 1; 551 aiov.iov_base = SCARG(uap, buf); 552 aiov.iov_len = SCARG(uap, len); 553 msg.msg_control = 0; 554 msg.msg_flags = SCARG(uap, flags); 555 return (recvit(p, SCARG(uap, s), &msg, 556 (caddr_t)SCARG(uap, fromlenaddr), retval)); 557 } 558 559 int 560 sys_recvmsg(p, v, retval) 561 struct proc *p; 562 void *v; 563 register_t *retval; 564 { 565 register struct sys_recvmsg_args /* { 566 syscallarg(int) s; 567 syscallarg(struct msghdr *) msg; 568 syscallarg(int) flags; 569 } */ *uap = v; 570 struct msghdr msg; 571 struct iovec aiov[UIO_SMALLIOV], *uiov, *iov; 572 register int error; 573 574 error = copyin((caddr_t)SCARG(uap, msg), (caddr_t)&msg, 575 sizeof (msg)); 576 if (error) 577 return (error); 578 if ((u_int)msg.msg_iovlen >= UIO_SMALLIOV) { 579 if ((u_int)msg.msg_iovlen >= UIO_MAXIOV) 580 return (EMSGSIZE); 581 MALLOC(iov, struct iovec *, 582 sizeof(struct iovec) * (u_int)msg.msg_iovlen, M_IOV, 583 M_WAITOK); 584 } else 585 iov = aiov; 586 #ifdef COMPAT_OLDSOCK 587 msg.msg_flags = SCARG(uap, flags) &~ MSG_COMPAT; 588 #else 589 msg.msg_flags = SCARG(uap, flags); 590 #endif 591 uiov = msg.msg_iov; 592 msg.msg_iov = iov; 593 error = copyin((caddr_t)uiov, (caddr_t)iov, 594 (unsigned)(msg.msg_iovlen * sizeof (struct iovec))); 595 if (error) 596 goto done; 597 if ((error = recvit(p, SCARG(uap, s), &msg, (caddr_t)0, retval)) == 0) { 598 msg.msg_iov = uiov; 599 error = copyout((caddr_t)&msg, (caddr_t)SCARG(uap, msg), 600 sizeof(msg)); 601 } 602 done: 603 if (iov != aiov) 604 FREE(iov, M_IOV); 605 return (error); 606 } 607 608 int 609 recvit(p, s, mp, namelenp, retsize) 610 register struct proc *p; 611 int s; 612 register struct msghdr *mp; 613 caddr_t namelenp; 614 register_t *retsize; 615 { 616 struct file *fp; 617 struct uio auio; 618 register struct iovec *iov; 619 register int i; 620 int len, error; 621 struct mbuf *from = 0, *control = 0; 622 struct socket *so; 623 #ifdef KTRACE 624 struct iovec *ktriov = NULL; 625 #endif 626 627 if ((error = getsock(p->p_fd, s, &fp)) != 0) 628 return (error); 629 auio.uio_iov = mp->msg_iov; 630 auio.uio_iovcnt = mp->msg_iovlen; 631 auio.uio_segflg = UIO_USERSPACE; 632 auio.uio_rw = UIO_READ; 633 auio.uio_procp = p; 634 auio.uio_offset = 0; /* XXX */ 635 auio.uio_resid = 0; 636 iov = mp->msg_iov; 637 for (i = 0; i < mp->msg_iovlen; i++, iov++) { 638 #if 0 639 /* cannot happen iov_len is unsigned */ 640 if (iov->iov_len < 0) 641 return (EINVAL); 642 #endif 643 if ((auio.uio_resid += iov->iov_len) < 0) 644 return (EINVAL); 645 } 646 #ifdef KTRACE 647 if (KTRPOINT(p, KTR_GENIO)) { 648 int iovlen = auio.uio_iovcnt * sizeof (struct iovec); 649 650 MALLOC(ktriov, struct iovec *, iovlen, M_TEMP, M_WAITOK); 651 bcopy((caddr_t)auio.uio_iov, (caddr_t)ktriov, iovlen); 652 } 653 #endif 654 len = auio.uio_resid; 655 so = (struct socket *)fp->f_data; 656 error = (*so->so_receive)(so, &from, &auio, NULL, 657 mp->msg_control ? &control : NULL, &mp->msg_flags); 658 if (error) { 659 if (auio.uio_resid != len && (error == ERESTART || 660 error == EINTR || error == EWOULDBLOCK)) 661 error = 0; 662 } 663 #ifdef KTRACE 664 if (ktriov != NULL) { 665 if (error == 0) 666 ktrgenio(p->p_tracep, s, UIO_READ, 667 ktriov, len - auio.uio_resid, error); 668 FREE(ktriov, M_TEMP); 669 } 670 #endif 671 if (error) 672 goto out; 673 *retsize = len - auio.uio_resid; 674 if (mp->msg_name) { 675 len = mp->msg_namelen; 676 if (len <= 0 || from == 0) 677 len = 0; 678 else { 679 #ifdef COMPAT_OLDSOCK 680 if (mp->msg_flags & MSG_COMPAT) 681 mtod(from, struct osockaddr *)->sa_family = 682 mtod(from, struct sockaddr *)->sa_family; 683 #endif 684 if (len > from->m_len) 685 len = from->m_len; 686 /* else if len < from->m_len ??? */ 687 error = copyout(mtod(from, caddr_t), 688 (caddr_t)mp->msg_name, (unsigned)len); 689 if (error) 690 goto out; 691 } 692 mp->msg_namelen = len; 693 if (namelenp && 694 (error = copyout((caddr_t)&len, namelenp, sizeof (int)))) { 695 #ifdef COMPAT_OLDSOCK 696 if (mp->msg_flags & MSG_COMPAT) 697 error = 0; /* old recvfrom didn't check */ 698 else 699 #endif 700 goto out; 701 } 702 } 703 if (mp->msg_control) { 704 #ifdef COMPAT_OLDSOCK 705 /* 706 * We assume that old recvmsg calls won't receive access 707 * rights and other control info, esp. as control info 708 * is always optional and those options didn't exist in 4.3. 709 * If we receive rights, trim the cmsghdr; anything else 710 * is tossed. 711 */ 712 if (control && mp->msg_flags & MSG_COMPAT) { 713 if (mtod(control, struct cmsghdr *)->cmsg_level != 714 SOL_SOCKET || 715 mtod(control, struct cmsghdr *)->cmsg_type != 716 SCM_RIGHTS) { 717 mp->msg_controllen = 0; 718 goto out; 719 } 720 control->m_len -= sizeof (struct cmsghdr); 721 control->m_data += sizeof (struct cmsghdr); 722 } 723 #endif 724 len = mp->msg_controllen; 725 if (len <= 0 || control == 0) 726 len = 0; 727 else { 728 struct mbuf *m = control; 729 caddr_t p = (caddr_t)mp->msg_control; 730 731 do { 732 i = m->m_len; 733 if (len < i) { 734 mp->msg_flags |= MSG_CTRUNC; 735 i = len; 736 } 737 error = copyout(mtod(m, caddr_t), p, 738 (unsigned)i); 739 if (m->m_next) 740 i = ALIGN(i); 741 p += i; 742 len -= i; 743 if (error != 0 || len <= 0) 744 break; 745 } while ((m = m->m_next) != NULL); 746 len = p - (caddr_t)mp->msg_control; 747 } 748 mp->msg_controllen = len; 749 } 750 out: 751 if (from) 752 m_freem(from); 753 if (control) 754 m_freem(control); 755 return (error); 756 } 757 758 /* ARGSUSED */ 759 int 760 sys_shutdown(p, v, retval) 761 struct proc *p; 762 void *v; 763 register_t *retval; 764 { 765 register struct sys_shutdown_args /* { 766 syscallarg(int) s; 767 syscallarg(int) how; 768 } */ *uap = v; 769 struct file *fp; 770 int error; 771 772 if ((error = getsock(p->p_fd, SCARG(uap, s), &fp)) != 0) 773 return (error); 774 return (soshutdown((struct socket *)fp->f_data, SCARG(uap, how))); 775 } 776 777 /* ARGSUSED */ 778 int 779 sys_setsockopt(p, v, retval) 780 struct proc *p; 781 void *v; 782 register_t *retval; 783 { 784 register struct sys_setsockopt_args /* { 785 syscallarg(int) s; 786 syscallarg(int) level; 787 syscallarg(int) name; 788 syscallarg(const void *) val; 789 syscallarg(int) valsize; 790 } */ *uap = v; 791 struct file *fp; 792 struct mbuf *m = NULL; 793 int error; 794 795 if ((error = getsock(p->p_fd, SCARG(uap, s), &fp)) != 0) 796 return (error); 797 if (SCARG(uap, valsize) > MLEN) 798 return (EINVAL); 799 if (SCARG(uap, val)) { 800 m = m_get(M_WAIT, MT_SOOPTS); 801 error = copyin(SCARG(uap, val), mtod(m, caddr_t), 802 (u_int)SCARG(uap, valsize)); 803 if (error) { 804 (void) m_free(m); 805 return (error); 806 } 807 m->m_len = SCARG(uap, valsize); 808 } 809 return (sosetopt((struct socket *)fp->f_data, SCARG(uap, level), 810 SCARG(uap, name), m)); 811 } 812 813 /* ARGSUSED */ 814 int 815 sys_getsockopt(p, v, retval) 816 struct proc *p; 817 void *v; 818 register_t *retval; 819 { 820 register struct sys_getsockopt_args /* { 821 syscallarg(int) s; 822 syscallarg(int) level; 823 syscallarg(int) name; 824 syscallarg(void *) val; 825 syscallarg(int *) avalsize; 826 } */ *uap = v; 827 struct file *fp; 828 struct mbuf *m = NULL; 829 int valsize, error; 830 831 if ((error = getsock(p->p_fd, SCARG(uap, s), &fp)) != 0) 832 return (error); 833 if (SCARG(uap, val)) { 834 error = copyin((caddr_t)SCARG(uap, avalsize), 835 (caddr_t)&valsize, sizeof (valsize)); 836 if (error) 837 return (error); 838 } else 839 valsize = 0; 840 if ((error = sogetopt((struct socket *)fp->f_data, SCARG(uap, level), 841 SCARG(uap, name), &m)) == 0 && SCARG(uap, val) && valsize && 842 m != NULL) { 843 if (valsize > m->m_len) 844 valsize = m->m_len; 845 error = copyout(mtod(m, caddr_t), SCARG(uap, val), 846 (u_int)valsize); 847 if (error == 0) 848 error = copyout((caddr_t)&valsize, 849 (caddr_t)SCARG(uap, avalsize), sizeof (valsize)); 850 } 851 if (m != NULL) 852 (void) m_free(m); 853 return (error); 854 } 855 856 /* ARGSUSED */ 857 int 858 sys_pipe(p, v, retval) 859 struct proc *p; 860 void *v; 861 register_t *retval; 862 { 863 register struct filedesc *fdp = p->p_fd; 864 struct file *rf, *wf; 865 struct socket *rso, *wso; 866 int fd, error; 867 868 if ((error = socreate(AF_LOCAL, &rso, SOCK_STREAM, 0)) != 0) 869 return (error); 870 if ((error = socreate(AF_LOCAL, &wso, SOCK_STREAM, 0)) != 0) 871 goto free1; 872 if ((error = falloc(p, &rf, &fd)) != 0) 873 goto free2; 874 retval[0] = fd; 875 rf->f_flag = FREAD; 876 rf->f_type = DTYPE_SOCKET; 877 rf->f_ops = &socketops; 878 rf->f_data = (caddr_t)rso; 879 if ((error = falloc(p, &wf, &fd)) != 0) 880 goto free3; 881 wf->f_flag = FWRITE; 882 wf->f_type = DTYPE_SOCKET; 883 wf->f_ops = &socketops; 884 wf->f_data = (caddr_t)wso; 885 retval[1] = fd; 886 if ((error = unp_connect2(wso, rso)) != 0) 887 goto free4; 888 return (0); 889 free4: 890 ffree(wf); 891 fdp->fd_ofiles[retval[1]] = 0; 892 free3: 893 ffree(rf); 894 fdp->fd_ofiles[retval[0]] = 0; 895 free2: 896 (void)soclose(wso); 897 free1: 898 (void)soclose(rso); 899 return (error); 900 } 901 902 /* 903 * Get socket name. 904 */ 905 /* ARGSUSED */ 906 int 907 sys_getsockname(p, v, retval) 908 struct proc *p; 909 void *v; 910 register_t *retval; 911 { 912 register struct sys_getsockname_args /* { 913 syscallarg(int) fdes; 914 syscallarg(struct sockaddr *) asa; 915 syscallarg(int *) alen; 916 } */ *uap = v; 917 struct file *fp; 918 register struct socket *so; 919 struct mbuf *m; 920 int len, error; 921 922 if ((error = getsock(p->p_fd, SCARG(uap, fdes), &fp)) != 0) 923 return (error); 924 error = copyin((caddr_t)SCARG(uap, alen), (caddr_t)&len, sizeof (len)); 925 if (error) 926 return (error); 927 so = (struct socket *)fp->f_data; 928 m = m_getclr(M_WAIT, MT_SONAME); 929 error = (*so->so_proto->pr_usrreq)(so, PRU_SOCKADDR, (struct mbuf *)0, 930 m, (struct mbuf *)0, (struct proc *)0); 931 if (error) 932 goto bad; 933 if (len > m->m_len) 934 len = m->m_len; 935 error = copyout(mtod(m, caddr_t), (caddr_t)SCARG(uap, asa), (u_int)len); 936 if (error == 0) 937 error = copyout((caddr_t)&len, (caddr_t)SCARG(uap, alen), 938 sizeof (len)); 939 bad: 940 m_freem(m); 941 return (error); 942 } 943 944 /* 945 * Get name of peer for connected socket. 946 */ 947 /* ARGSUSED */ 948 int 949 sys_getpeername(p, v, retval) 950 struct proc *p; 951 void *v; 952 register_t *retval; 953 { 954 register struct sys_getpeername_args /* { 955 syscallarg(int) fdes; 956 syscallarg(struct sockaddr *) asa; 957 syscallarg(int *) alen; 958 } */ *uap = v; 959 struct file *fp; 960 register struct socket *so; 961 struct mbuf *m; 962 int len, error; 963 964 if ((error = getsock(p->p_fd, SCARG(uap, fdes), &fp)) != 0) 965 return (error); 966 so = (struct socket *)fp->f_data; 967 if ((so->so_state & (SS_ISCONNECTED|SS_ISCONFIRMING)) == 0) 968 return (ENOTCONN); 969 error = copyin((caddr_t)SCARG(uap, alen), (caddr_t)&len, sizeof (len)); 970 if (error) 971 return (error); 972 m = m_getclr(M_WAIT, MT_SONAME); 973 error = (*so->so_proto->pr_usrreq)(so, PRU_PEERADDR, (struct mbuf *)0, 974 m, (struct mbuf *)0, (struct proc *)0); 975 if (error) 976 goto bad; 977 if (len > m->m_len) 978 len = m->m_len; 979 error = copyout(mtod(m, caddr_t), (caddr_t)SCARG(uap, asa), (u_int)len); 980 if (error) 981 goto bad; 982 error = copyout((caddr_t)&len, (caddr_t)SCARG(uap, alen), sizeof (len)); 983 bad: 984 m_freem(m); 985 return (error); 986 } 987 988 /* 989 * XXX In a perfect world, we wouldn't pass around socket control 990 * XXX arguments in mbufs, and this could go away. 991 */ 992 int 993 sockargs(mp, buf, buflen, type) 994 struct mbuf **mp; 995 const void *buf; 996 int buflen, type; 997 { 998 register struct sockaddr *sa; 999 register struct mbuf *m; 1000 int error; 1001 1002 /* 1003 * We can't allow socket names > UCHAR_MAX in length, since that 1004 * will overflow sa_len. 1005 */ 1006 if (type == MT_SONAME && (u_int)buflen > UCHAR_MAX) 1007 return (EINVAL); 1008 1009 /* Allocate an mbuf to hold the arguments. */ 1010 m = m_get(M_WAIT, type); 1011 if ((u_int)buflen > MLEN) { 1012 /* 1013 * Won't fit into a regular mbuf, so we allocate just 1014 * enough external storage to hold the argument. 1015 */ 1016 MEXTMALLOC(m, buflen, M_WAITOK); 1017 } 1018 m->m_len = buflen; 1019 error = copyin(buf, mtod(m, caddr_t), (u_int)buflen); 1020 if (error) { 1021 (void) m_free(m); 1022 return (error); 1023 } 1024 *mp = m; 1025 if (type == MT_SONAME) { 1026 sa = mtod(m, struct sockaddr *); 1027 1028 #if defined(COMPAT_OLDSOCK) && BYTE_ORDER != BIG_ENDIAN 1029 if (sa->sa_family == 0 && sa->sa_len < AF_MAX) 1030 sa->sa_family = sa->sa_len; 1031 #endif 1032 sa->sa_len = buflen; 1033 } 1034 return (0); 1035 } 1036 1037 int 1038 getsock(fdp, fdes, fpp) 1039 struct filedesc *fdp; 1040 int fdes; 1041 struct file **fpp; 1042 { 1043 register struct file *fp; 1044 1045 if ((unsigned)fdes >= fdp->fd_nfiles || 1046 (fp = fdp->fd_ofiles[fdes]) == NULL) 1047 return (EBADF); 1048 if (fp->f_type != DTYPE_SOCKET) 1049 return (ENOTSOCK); 1050 *fpp = fp; 1051 return (0); 1052 } 1053
Indexes created Fri Sep 26 08:10:20 GMT 2025