uipc_syscalls.c revision 1.19
1 /* $NetBSD: uipc_syscalls.c,v 1.19 1996/02/09 19:00:48 christos 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 8.4 (Berkeley) 2/21/94 36 */ 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/filedesc.h> 41 #include <sys/proc.h> 42 #include <sys/file.h> 43 #include <sys/buf.h> 44 #include <sys/malloc.h> 45 #include <sys/mbuf.h> 46 #include <sys/protosw.h> 47 #include <sys/socket.h> 48 #include <sys/socketvar.h> 49 #include <sys/signalvar.h> 50 #include <sys/un.h> 51 #ifdef KTRACE 52 #include <sys/ktrace.h> 53 #endif 54 55 #include <sys/mount.h> 56 #include <sys/syscallargs.h> 57 58 /* 59 * System call interface to the socket abstraction. 60 */ 61 extern struct fileops socketops; 62 63 int 64 sys_socket(p, v, retval) 65 struct proc *p; 66 void *v; 67 register_t *retval; 68 { 69 register struct sys_socket_args /* { 70 syscallarg(int) domain; 71 syscallarg(int) type; 72 syscallarg(int) protocol; 73 } */ *uap = v; 74 struct filedesc *fdp = p->p_fd; 75 struct socket *so; 76 struct file *fp; 77 int fd, error; 78 79 if ((error = falloc(p, &fp, &fd)) != 0) 80 return (error); 81 fp->f_flag = FREAD|FWRITE; 82 fp->f_type = DTYPE_SOCKET; 83 fp->f_ops = &socketops; 84 error = socreate(SCARG(uap, domain), &so, SCARG(uap, type), 85 SCARG(uap, protocol)); 86 if (error) { 87 fdp->fd_ofiles[fd] = 0; 88 ffree(fp); 89 } else { 90 fp->f_data = (caddr_t)so; 91 *retval = fd; 92 } 93 return (error); 94 } 95 96 /* ARGSUSED */ 97 int 98 sys_bind(p, v, retval) 99 struct proc *p; 100 void *v; 101 register_t *retval; 102 { 103 register struct sys_bind_args /* { 104 syscallarg(int) s; 105 syscallarg(caddr_t) name; 106 syscallarg(int) namelen; 107 } */ *uap = v; 108 struct file *fp; 109 struct mbuf *nam; 110 int error; 111 112 if ((error = getsock(p->p_fd, SCARG(uap, s), &fp)) != 0) 113 return (error); 114 error = sockargs(&nam, SCARG(uap, name), SCARG(uap, namelen), 115 MT_SONAME); 116 if (error) 117 return (error); 118 error = sobind((struct socket *)fp->f_data, nam); 119 m_freem(nam); 120 return (error); 121 } 122 123 /* ARGSUSED */ 124 int 125 sys_listen(p, v, retval) 126 struct proc *p; 127 void *v; 128 register_t *retval; 129 { 130 register struct sys_listen_args /* { 131 syscallarg(int) s; 132 syscallarg(int) backlog; 133 } */ *uap = v; 134 struct file *fp; 135 int error; 136 137 if ((error = getsock(p->p_fd, SCARG(uap, s), &fp)) != 0) 138 return (error); 139 return (solisten((struct socket *)fp->f_data, SCARG(uap, backlog))); 140 } 141 142 int 143 sys_accept(p, v, retval) 144 struct proc *p; 145 void *v; 146 register_t *retval; 147 { 148 register struct sys_accept_args /* { 149 syscallarg(int) s; 150 syscallarg(caddr_t) name; 151 syscallarg(int *) anamelen; 152 } */ *uap = v; 153 struct file *fp; 154 struct mbuf *nam; 155 int namelen, error, s, tmpfd; 156 register struct socket *so; 157 158 if (SCARG(uap, name) && (error = copyin((caddr_t)SCARG(uap, anamelen), 159 (caddr_t)&namelen, sizeof (namelen)))) 160 return (error); 161 if ((error = getsock(p->p_fd, SCARG(uap, s), &fp)) != 0) 162 return (error); 163 s = splsoftnet(); 164 so = (struct socket *)fp->f_data; 165 if ((so->so_options & SO_ACCEPTCONN) == 0) { 166 splx(s); 167 return (EINVAL); 168 } 169 if ((so->so_state & SS_NBIO) && so->so_qlen == 0) { 170 splx(s); 171 return (EWOULDBLOCK); 172 } 173 while (so->so_qlen == 0 && so->so_error == 0) { 174 if (so->so_state & SS_CANTRCVMORE) { 175 so->so_error = ECONNABORTED; 176 break; 177 } 178 error = tsleep((caddr_t)&so->so_timeo, PSOCK | PCATCH, 179 netcon, 0); 180 if (error) { 181 splx(s); 182 return (error); 183 } 184 } 185 if (so->so_error) { 186 error = so->so_error; 187 so->so_error = 0; 188 splx(s); 189 return (error); 190 } 191 if ((error = falloc(p, &fp, &tmpfd)) != 0) { 192 splx(s); 193 return (error); 194 } 195 *retval = tmpfd; 196 { struct socket *aso = so->so_q; 197 if (soqremque(aso, 1) == 0) 198 panic("accept"); 199 so = aso; 200 } 201 fp->f_type = DTYPE_SOCKET; 202 fp->f_flag = FREAD|FWRITE; 203 fp->f_ops = &socketops; 204 fp->f_data = (caddr_t)so; 205 nam = m_get(M_WAIT, MT_SONAME); 206 (void) soaccept(so, nam); 207 if (SCARG(uap, name)) { 208 if (namelen > nam->m_len) 209 namelen = nam->m_len; 210 /* SHOULD COPY OUT A CHAIN HERE */ 211 if ((error = copyout(mtod(nam, caddr_t), 212 (caddr_t)SCARG(uap, name), (u_int)namelen)) == 0) 213 error = copyout((caddr_t)&namelen, 214 (caddr_t)SCARG(uap, anamelen), 215 sizeof (*SCARG(uap, anamelen))); 216 } 217 m_freem(nam); 218 splx(s); 219 return (error); 220 } 221 222 /* ARGSUSED */ 223 int 224 sys_connect(p, v, retval) 225 struct proc *p; 226 void *v; 227 register_t *retval; 228 { 229 register struct sys_connect_args /* { 230 syscallarg(int) s; 231 syscallarg(caddr_t) name; 232 syscallarg(int) namelen; 233 } */ *uap = v; 234 struct file *fp; 235 register struct socket *so; 236 struct mbuf *nam; 237 int error, s; 238 239 if ((error = getsock(p->p_fd, SCARG(uap, s), &fp)) != 0) 240 return (error); 241 so = (struct socket *)fp->f_data; 242 if ((so->so_state & SS_NBIO) && (so->so_state & SS_ISCONNECTING)) 243 return (EALREADY); 244 error = sockargs(&nam, SCARG(uap, name), SCARG(uap, namelen), 245 MT_SONAME); 246 if (error) 247 return (error); 248 error = soconnect(so, nam); 249 if (error) 250 goto bad; 251 if ((so->so_state & SS_NBIO) && (so->so_state & SS_ISCONNECTING)) { 252 m_freem(nam); 253 return (EINPROGRESS); 254 } 255 s = splsoftnet(); 256 while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) { 257 error = tsleep((caddr_t)&so->so_timeo, PSOCK | PCATCH, 258 netcon, 0); 259 if (error) 260 break; 261 } 262 if (error == 0) { 263 error = so->so_error; 264 so->so_error = 0; 265 } 266 splx(s); 267 bad: 268 so->so_state &= ~SS_ISCONNECTING; 269 m_freem(nam); 270 if (error == ERESTART) 271 error = EINTR; 272 return (error); 273 } 274 275 int 276 sys_socketpair(p, v, retval) 277 struct proc *p; 278 void *v; 279 register_t *retval; 280 { 281 register struct sys_socketpair_args /* { 282 syscallarg(int) domain; 283 syscallarg(int) type; 284 syscallarg(int) protocol; 285 syscallarg(int *) rsv; 286 } */ *uap = v; 287 register struct filedesc *fdp = p->p_fd; 288 struct file *fp1, *fp2; 289 struct socket *so1, *so2; 290 int fd, error, sv[2]; 291 292 error = socreate(SCARG(uap, domain), &so1, SCARG(uap, type), 293 SCARG(uap, protocol)); 294 if (error) 295 return (error); 296 error = socreate(SCARG(uap, domain), &so2, SCARG(uap, type), 297 SCARG(uap, protocol)); 298 if (error) 299 goto free1; 300 if ((error = falloc(p, &fp1, &fd)) != 0) 301 goto free2; 302 sv[0] = fd; 303 fp1->f_flag = FREAD|FWRITE; 304 fp1->f_type = DTYPE_SOCKET; 305 fp1->f_ops = &socketops; 306 fp1->f_data = (caddr_t)so1; 307 if ((error = falloc(p, &fp2, &fd)) != 0) 308 goto free3; 309 fp2->f_flag = FREAD|FWRITE; 310 fp2->f_type = DTYPE_SOCKET; 311 fp2->f_ops = &socketops; 312 fp2->f_data = (caddr_t)so2; 313 sv[1] = fd; 314 if ((error = soconnect2(so1, so2)) != 0) 315 goto free4; 316 if (SCARG(uap, type) == SOCK_DGRAM) { 317 /* 318 * Datagram socket connection is asymmetric. 319 */ 320 if ((error = soconnect2(so2, so1)) != 0) 321 goto free4; 322 } 323 error = copyout((caddr_t)sv, (caddr_t)SCARG(uap, rsv), 324 2 * sizeof (int)); 325 retval[0] = sv[0]; /* XXX ??? */ 326 retval[1] = sv[1]; /* XXX ??? */ 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(caddr_t) buf; 350 syscallarg(size_t) len; 351 syscallarg(int) flags; 352 syscallarg(caddr_t) to; 353 syscallarg(int) tolen; 354 } */ *uap = v; 355 struct msghdr msg; 356 struct iovec aiov; 357 358 msg.msg_name = SCARG(uap, to); 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 = SCARG(uap, buf); 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(caddr_t) 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 #ifdef KTRACE 427 struct iovec *ktriov = NULL; 428 #endif 429 430 if ((error = getsock(p->p_fd, s, &fp)) != 0) 431 return (error); 432 auio.uio_iov = mp->msg_iov; 433 auio.uio_iovcnt = mp->msg_iovlen; 434 auio.uio_segflg = UIO_USERSPACE; 435 auio.uio_rw = UIO_WRITE; 436 auio.uio_procp = p; 437 auio.uio_offset = 0; /* XXX */ 438 auio.uio_resid = 0; 439 iov = mp->msg_iov; 440 for (i = 0; i < mp->msg_iovlen; i++, iov++) { 441 #if 0 442 /* cannot happen; iov_len is unsigned */ 443 if (iov->iov_len < 0) 444 return (EINVAL); 445 #endif 446 if ((auio.uio_resid += iov->iov_len) < 0) 447 return (EINVAL); 448 } 449 if (mp->msg_name) { 450 error = sockargs(&to, mp->msg_name, mp->msg_namelen, 451 MT_SONAME); 452 if (error) 453 return (error); 454 } else 455 to = 0; 456 if (mp->msg_control) { 457 if (mp->msg_controllen < sizeof(struct cmsghdr) 458 #ifdef COMPAT_OLDSOCK 459 && mp->msg_flags != MSG_COMPAT 460 #endif 461 ) { 462 error = EINVAL; 463 goto bad; 464 } 465 error = sockargs(&control, mp->msg_control, 466 mp->msg_controllen, MT_CONTROL); 467 if (error) 468 goto bad; 469 #ifdef COMPAT_OLDSOCK 470 if (mp->msg_flags == MSG_COMPAT) { 471 register struct cmsghdr *cm; 472 473 M_PREPEND(control, sizeof(*cm), M_WAIT); 474 if (control == 0) { 475 error = ENOBUFS; 476 goto bad; 477 } else { 478 cm = mtod(control, struct cmsghdr *); 479 cm->cmsg_len = control->m_len; 480 cm->cmsg_level = SOL_SOCKET; 481 cm->cmsg_type = SCM_RIGHTS; 482 } 483 } 484 #endif 485 } else 486 control = 0; 487 #ifdef KTRACE 488 if (KTRPOINT(p, KTR_GENIO)) { 489 int iovlen = auio.uio_iovcnt * sizeof (struct iovec); 490 491 MALLOC(ktriov, struct iovec *, iovlen, M_TEMP, M_WAITOK); 492 bcopy((caddr_t)auio.uio_iov, (caddr_t)ktriov, iovlen); 493 } 494 #endif 495 len = auio.uio_resid; 496 error = sosend((struct socket *)fp->f_data, to, &auio, 497 NULL, control, flags); 498 if (error) { 499 if (auio.uio_resid != len && (error == ERESTART || 500 error == EINTR || error == EWOULDBLOCK)) 501 error = 0; 502 if (error == EPIPE) 503 psignal(p, SIGPIPE); 504 } 505 if (error == 0) 506 *retsize = len - auio.uio_resid; 507 #ifdef KTRACE 508 if (ktriov != NULL) { 509 if (error == 0) 510 ktrgenio(p->p_tracep, s, UIO_WRITE, 511 ktriov, *retsize, error); 512 FREE(ktriov, M_TEMP); 513 } 514 #endif 515 bad: 516 if (to) 517 m_freem(to); 518 return (error); 519 } 520 521 int 522 sys_recvfrom(p, v, retval) 523 struct proc *p; 524 void *v; 525 register_t *retval; 526 { 527 register struct sys_recvfrom_args /* { 528 syscallarg(int) s; 529 syscallarg(caddr_t) buf; 530 syscallarg(size_t) len; 531 syscallarg(int) flags; 532 syscallarg(caddr_t) from; 533 syscallarg(int *) fromlenaddr; 534 } */ *uap = v; 535 struct msghdr msg; 536 struct iovec aiov; 537 int error; 538 539 if (SCARG(uap, fromlenaddr)) { 540 error = copyin((caddr_t)SCARG(uap, fromlenaddr), 541 (caddr_t)&msg.msg_namelen, 542 sizeof (msg.msg_namelen)); 543 if (error) 544 return (error); 545 } else 546 msg.msg_namelen = 0; 547 msg.msg_name = SCARG(uap, from); 548 msg.msg_iov = &aiov; 549 msg.msg_iovlen = 1; 550 aiov.iov_base = SCARG(uap, buf); 551 aiov.iov_len = SCARG(uap, len); 552 msg.msg_control = 0; 553 msg.msg_flags = SCARG(uap, flags); 554 return (recvit(p, SCARG(uap, s), &msg, 555 (caddr_t)SCARG(uap, fromlenaddr), retval)); 556 } 557 558 int 559 sys_recvmsg(p, v, retval) 560 struct proc *p; 561 void *v; 562 register_t *retval; 563 { 564 register struct sys_recvmsg_args /* { 565 syscallarg(int) s; 566 syscallarg(struct msghdr *) msg; 567 syscallarg(int) flags; 568 } */ *uap = v; 569 struct msghdr msg; 570 struct iovec aiov[UIO_SMALLIOV], *uiov, *iov; 571 register int error; 572 573 error = copyin((caddr_t)SCARG(uap, msg), (caddr_t)&msg, 574 sizeof (msg)); 575 if (error) 576 return (error); 577 if ((u_int)msg.msg_iovlen >= UIO_SMALLIOV) { 578 if ((u_int)msg.msg_iovlen >= UIO_MAXIOV) 579 return (EMSGSIZE); 580 MALLOC(iov, struct iovec *, 581 sizeof(struct iovec) * (u_int)msg.msg_iovlen, M_IOV, 582 M_WAITOK); 583 } else 584 iov = aiov; 585 #ifdef COMPAT_OLDSOCK 586 msg.msg_flags = SCARG(uap, flags) &~ MSG_COMPAT; 587 #else 588 msg.msg_flags = SCARG(uap, flags); 589 #endif 590 uiov = msg.msg_iov; 591 msg.msg_iov = iov; 592 error = copyin((caddr_t)uiov, (caddr_t)iov, 593 (unsigned)(msg.msg_iovlen * sizeof (struct iovec))); 594 if (error) 595 goto done; 596 if ((error = recvit(p, SCARG(uap, s), &msg, (caddr_t)0, retval)) == 0) { 597 msg.msg_iov = uiov; 598 error = copyout((caddr_t)&msg, (caddr_t)SCARG(uap, msg), 599 sizeof(msg)); 600 } 601 done: 602 if (iov != aiov) 603 FREE(iov, M_IOV); 604 return (error); 605 } 606 607 int 608 recvit(p, s, mp, namelenp, retsize) 609 register struct proc *p; 610 int s; 611 register struct msghdr *mp; 612 caddr_t namelenp; 613 register_t *retsize; 614 { 615 struct file *fp; 616 struct uio auio; 617 register struct iovec *iov; 618 register int i; 619 int len, error; 620 struct mbuf *from = 0, *control = 0; 621 #ifdef KTRACE 622 struct iovec *ktriov = NULL; 623 #endif 624 625 if ((error = getsock(p->p_fd, s, &fp)) != 0) 626 return (error); 627 auio.uio_iov = mp->msg_iov; 628 auio.uio_iovcnt = mp->msg_iovlen; 629 auio.uio_segflg = UIO_USERSPACE; 630 auio.uio_rw = UIO_READ; 631 auio.uio_procp = p; 632 auio.uio_offset = 0; /* XXX */ 633 auio.uio_resid = 0; 634 iov = mp->msg_iov; 635 for (i = 0; i < mp->msg_iovlen; i++, iov++) { 636 #if 0 637 /* cannot happen iov_len is unsigned */ 638 if (iov->iov_len < 0) 639 return (EINVAL); 640 #endif 641 if ((auio.uio_resid += iov->iov_len) < 0) 642 return (EINVAL); 643 } 644 #ifdef KTRACE 645 if (KTRPOINT(p, KTR_GENIO)) { 646 int iovlen = auio.uio_iovcnt * sizeof (struct iovec); 647 648 MALLOC(ktriov, struct iovec *, iovlen, M_TEMP, M_WAITOK); 649 bcopy((caddr_t)auio.uio_iov, (caddr_t)ktriov, iovlen); 650 } 651 #endif 652 len = auio.uio_resid; 653 error = soreceive((struct socket *)fp->f_data, &from, &auio, 654 NULL, mp->msg_control ? &control : NULL, 655 &mp->msg_flags); 656 if (error) { 657 if (auio.uio_resid != len && (error == ERESTART || 658 error == EINTR || error == EWOULDBLOCK)) 659 error = 0; 660 } 661 #ifdef KTRACE 662 if (ktriov != NULL) { 663 if (error == 0) 664 ktrgenio(p->p_tracep, s, UIO_READ, 665 ktriov, len - auio.uio_resid, error); 666 FREE(ktriov, M_TEMP); 667 } 668 #endif 669 if (error) 670 goto out; 671 *retsize = len - auio.uio_resid; 672 if (mp->msg_name) { 673 len = mp->msg_namelen; 674 if (len <= 0 || from == 0) 675 len = 0; 676 else { 677 #ifdef COMPAT_OLDSOCK 678 if (mp->msg_flags & MSG_COMPAT) 679 mtod(from, struct osockaddr *)->sa_family = 680 mtod(from, struct sockaddr *)->sa_family; 681 #endif 682 if (len > from->m_len) 683 len = from->m_len; 684 /* else if len < from->m_len ??? */ 685 error = copyout(mtod(from, caddr_t), 686 (caddr_t)mp->msg_name, (unsigned)len); 687 if (error) 688 goto out; 689 } 690 mp->msg_namelen = len; 691 if (namelenp && 692 (error = copyout((caddr_t)&len, namelenp, sizeof (int)))) { 693 #ifdef COMPAT_OLDSOCK 694 if (mp->msg_flags & MSG_COMPAT) 695 error = 0; /* old recvfrom didn't check */ 696 else 697 #endif 698 goto out; 699 } 700 } 701 if (mp->msg_control) { 702 #ifdef COMPAT_OLDSOCK 703 /* 704 * We assume that old recvmsg calls won't receive access 705 * rights and other control info, esp. as control info 706 * is always optional and those options didn't exist in 4.3. 707 * If we receive rights, trim the cmsghdr; anything else 708 * is tossed. 709 */ 710 if (control && mp->msg_flags & MSG_COMPAT) { 711 if (mtod(control, struct cmsghdr *)->cmsg_level != 712 SOL_SOCKET || 713 mtod(control, struct cmsghdr *)->cmsg_type != 714 SCM_RIGHTS) { 715 mp->msg_controllen = 0; 716 goto out; 717 } 718 control->m_len -= sizeof (struct cmsghdr); 719 control->m_data += sizeof (struct cmsghdr); 720 } 721 #endif 722 len = mp->msg_controllen; 723 if (len <= 0 || control == 0) 724 len = 0; 725 else { 726 if (len >= control->m_len) 727 len = control->m_len; 728 else 729 mp->msg_flags |= MSG_CTRUNC; 730 error = copyout((caddr_t)mtod(control, caddr_t), 731 (caddr_t)mp->msg_control, (unsigned)len); 732 } 733 mp->msg_controllen = len; 734 } 735 out: 736 if (from) 737 m_freem(from); 738 if (control) 739 m_freem(control); 740 return (error); 741 } 742 743 /* ARGSUSED */ 744 int 745 sys_shutdown(p, v, retval) 746 struct proc *p; 747 void *v; 748 register_t *retval; 749 { 750 register struct sys_shutdown_args /* { 751 syscallarg(int) s; 752 syscallarg(int) how; 753 } */ *uap = v; 754 struct file *fp; 755 int error; 756 757 if ((error = getsock(p->p_fd, SCARG(uap, s), &fp)) != 0) 758 return (error); 759 return (soshutdown((struct socket *)fp->f_data, SCARG(uap, how))); 760 } 761 762 /* ARGSUSED */ 763 int 764 sys_setsockopt(p, v, retval) 765 struct proc *p; 766 void *v; 767 register_t *retval; 768 { 769 register struct sys_setsockopt_args /* { 770 syscallarg(int) s; 771 syscallarg(int) level; 772 syscallarg(int) name; 773 syscallarg(caddr_t) val; 774 syscallarg(int) valsize; 775 } */ *uap = v; 776 struct file *fp; 777 struct mbuf *m = NULL; 778 int error; 779 780 if ((error = getsock(p->p_fd, SCARG(uap, s), &fp)) != 0) 781 return (error); 782 if (SCARG(uap, valsize) > MLEN) 783 return (EINVAL); 784 if (SCARG(uap, val)) { 785 m = m_get(M_WAIT, MT_SOOPTS); 786 if (m == NULL) 787 return (ENOBUFS); 788 error = copyin(SCARG(uap, val), mtod(m, caddr_t), 789 (u_int)SCARG(uap, valsize)); 790 if (error) { 791 (void) m_free(m); 792 return (error); 793 } 794 m->m_len = SCARG(uap, valsize); 795 } 796 return (sosetopt((struct socket *)fp->f_data, SCARG(uap, level), 797 SCARG(uap, name), m)); 798 } 799 800 /* ARGSUSED */ 801 int 802 sys_getsockopt(p, v, retval) 803 struct proc *p; 804 void *v; 805 register_t *retval; 806 { 807 register struct sys_getsockopt_args /* { 808 syscallarg(int) s; 809 syscallarg(int) level; 810 syscallarg(int) name; 811 syscallarg(caddr_t) val; 812 syscallarg(int *) avalsize; 813 } */ *uap = v; 814 struct file *fp; 815 struct mbuf *m = NULL; 816 int valsize, error; 817 818 if ((error = getsock(p->p_fd, SCARG(uap, s), &fp)) != 0) 819 return (error); 820 if (SCARG(uap, val)) { 821 error = copyin((caddr_t)SCARG(uap, avalsize), 822 (caddr_t)&valsize, sizeof (valsize)); 823 if (error) 824 return (error); 825 } else 826 valsize = 0; 827 if ((error = sogetopt((struct socket *)fp->f_data, SCARG(uap, level), 828 SCARG(uap, name), &m)) == 0 && SCARG(uap, val) && valsize && 829 m != NULL) { 830 if (valsize > m->m_len) 831 valsize = m->m_len; 832 error = copyout(mtod(m, caddr_t), SCARG(uap, val), 833 (u_int)valsize); 834 if (error == 0) 835 error = copyout((caddr_t)&valsize, 836 (caddr_t)SCARG(uap, avalsize), sizeof (valsize)); 837 } 838 if (m != NULL) 839 (void) m_free(m); 840 return (error); 841 } 842 843 /* ARGSUSED */ 844 int 845 sys_pipe(p, v, retval) 846 struct proc *p; 847 void *v; 848 register_t *retval; 849 { 850 register struct filedesc *fdp = p->p_fd; 851 struct file *rf, *wf; 852 struct socket *rso, *wso; 853 int fd, error; 854 855 if ((error = socreate(AF_UNIX, &rso, SOCK_STREAM, 0)) != 0) 856 return (error); 857 if ((error = socreate(AF_UNIX, &wso, SOCK_STREAM, 0)) != 0) 858 goto free1; 859 if ((error = falloc(p, &rf, &fd)) != 0) 860 goto free2; 861 retval[0] = fd; 862 rf->f_flag = FREAD; 863 rf->f_type = DTYPE_SOCKET; 864 rf->f_ops = &socketops; 865 rf->f_data = (caddr_t)rso; 866 if ((error = falloc(p, &wf, &fd)) != 0) 867 goto free3; 868 wf->f_flag = FWRITE; 869 wf->f_type = DTYPE_SOCKET; 870 wf->f_ops = &socketops; 871 wf->f_data = (caddr_t)wso; 872 retval[1] = fd; 873 if ((error = unp_connect2(wso, rso)) != 0) 874 goto free4; 875 return (0); 876 free4: 877 ffree(wf); 878 fdp->fd_ofiles[retval[1]] = 0; 879 free3: 880 ffree(rf); 881 fdp->fd_ofiles[retval[0]] = 0; 882 free2: 883 (void)soclose(wso); 884 free1: 885 (void)soclose(rso); 886 return (error); 887 } 888 889 /* 890 * Get socket name. 891 */ 892 /* ARGSUSED */ 893 int 894 sys_getsockname(p, v, retval) 895 struct proc *p; 896 void *v; 897 register_t *retval; 898 { 899 register struct sys_getsockname_args /* { 900 syscallarg(int) fdes; 901 syscallarg(caddr_t) asa; 902 syscallarg(int *) alen; 903 } */ *uap = v; 904 struct file *fp; 905 register struct socket *so; 906 struct mbuf *m; 907 int len, error; 908 909 if ((error = getsock(p->p_fd, SCARG(uap, fdes), &fp)) != 0) 910 return (error); 911 error = copyin((caddr_t)SCARG(uap, alen), (caddr_t)&len, sizeof (len)); 912 if (error) 913 return (error); 914 so = (struct socket *)fp->f_data; 915 m = m_getclr(M_WAIT, MT_SONAME); 916 if (m == NULL) 917 return (ENOBUFS); 918 error = (*so->so_proto->pr_usrreq)(so, PRU_SOCKADDR, 0, m, 0); 919 if (error) 920 goto bad; 921 if (len > m->m_len) 922 len = m->m_len; 923 error = copyout(mtod(m, caddr_t), (caddr_t)SCARG(uap, asa), (u_int)len); 924 if (error == 0) 925 error = copyout((caddr_t)&len, (caddr_t)SCARG(uap, alen), 926 sizeof (len)); 927 bad: 928 m_freem(m); 929 return (error); 930 } 931 932 /* 933 * Get name of peer for connected socket. 934 */ 935 /* ARGSUSED */ 936 int 937 sys_getpeername(p, v, retval) 938 struct proc *p; 939 void *v; 940 register_t *retval; 941 { 942 register struct sys_getpeername_args /* { 943 syscallarg(int) fdes; 944 syscallarg(caddr_t) asa; 945 syscallarg(int *) alen; 946 } */ *uap = v; 947 struct file *fp; 948 register struct socket *so; 949 struct mbuf *m; 950 int len, error; 951 952 if ((error = getsock(p->p_fd, SCARG(uap, fdes), &fp)) != 0) 953 return (error); 954 so = (struct socket *)fp->f_data; 955 if ((so->so_state & (SS_ISCONNECTED|SS_ISCONFIRMING)) == 0) 956 return (ENOTCONN); 957 error = copyin((caddr_t)SCARG(uap, alen), (caddr_t)&len, sizeof (len)); 958 if (error) 959 return (error); 960 m = m_getclr(M_WAIT, MT_SONAME); 961 if (m == NULL) 962 return (ENOBUFS); 963 error = (*so->so_proto->pr_usrreq)(so, PRU_PEERADDR, 0, m, 0); 964 if (error) 965 goto bad; 966 if (len > m->m_len) 967 len = m->m_len; 968 error = copyout(mtod(m, caddr_t), (caddr_t)SCARG(uap, asa), (u_int)len); 969 if (error) 970 goto bad; 971 error = copyout((caddr_t)&len, (caddr_t)SCARG(uap, alen), sizeof (len)); 972 bad: 973 m_freem(m); 974 return (error); 975 } 976 977 int 978 sockargs(mp, buf, buflen, type) 979 struct mbuf **mp; 980 caddr_t buf; 981 int buflen, type; 982 { 983 register struct sockaddr *sa; 984 register struct mbuf *m; 985 int error; 986 987 if ((u_int)buflen > MLEN) { 988 #ifdef COMPAT_OLDSOCK 989 if (type == MT_SONAME && (u_int)buflen <= 112) 990 buflen = MLEN; /* unix domain compat. hack */ 991 else 992 #endif 993 return (EINVAL); 994 } 995 m = m_get(M_WAIT, type); 996 if (m == NULL) 997 return (ENOBUFS); 998 m->m_len = buflen; 999 error = copyin(buf, mtod(m, caddr_t), (u_int)buflen); 1000 if (error) { 1001 (void) m_free(m); 1002 return (error); 1003 } 1004 *mp = m; 1005 if (type == MT_SONAME) { 1006 sa = mtod(m, struct sockaddr *); 1007 1008 #if defined(COMPAT_OLDSOCK) && BYTE_ORDER != BIG_ENDIAN 1009 if (sa->sa_family == 0 && sa->sa_len < AF_MAX) 1010 sa->sa_family = sa->sa_len; 1011 #endif 1012 sa->sa_len = buflen; 1013 } 1014 return (0); 1015 } 1016 1017 int 1018 getsock(fdp, fdes, fpp) 1019 struct filedesc *fdp; 1020 int fdes; 1021 struct file **fpp; 1022 { 1023 register struct file *fp; 1024 1025 if ((unsigned)fdes >= fdp->fd_nfiles || 1026 (fp = fdp->fd_ofiles[fdes]) == NULL) 1027 return (EBADF); 1028 if (fp->f_type != DTYPE_SOCKET) 1029 return (ENOTSOCK); 1030 *fpp = fp; 1031 return (0); 1032 } 1033
Indexes created Tue Oct 21 12:09:54 GMT 2025