1 /* 2 * Copyright (c) 1982, 1986, 1989, 1990, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 * @(#)uipc_syscalls.c 8.2 (Berkeley) 08/10/93 8 */ 9 10 #include <sys/param.h> 11 #include <sys/filedesc.h> 12 #include <sys/proc.h> 13 #include <sys/file.h> 14 #include <sys/buf.h> 15 #include <sys/malloc.h> 16 #include <sys/mbuf.h> 17 #include <sys/protosw.h> 18 #include <sys/socket.h> 19 #include <sys/socketvar.h> 20 #ifdef KTRACE 21 #include <sys/ktrace.h> 22 #endif 23 24 /* 25 * System call interface to the socket abstraction. 26 */ 27 #if defined(COMPAT_43) || defined(COMPAT_SUNOS) 28 #define COMPAT_OLDSOCK 29 #endif 30 31 extern struct fileops socketops; 32 33 struct socket_args { 34 int domain; 35 int type; 36 int protocol; 37 }; 38 socket(p, uap, retval) 39 struct proc *p; 40 register struct socket_args *uap; 41 int *retval; 42 { 43 struct filedesc *fdp = p->p_fd; 44 struct socket *so; 45 struct file *fp; 46 int fd, error; 47 48 if (error = falloc(p, &fp, &fd)) 49 return (error); 50 fp->f_flag = FREAD|FWRITE; 51 fp->f_type = DTYPE_SOCKET; 52 fp->f_ops = &socketops; 53 if (error = socreate(uap->domain, &so, uap->type, uap->protocol)) { 54 fdp->fd_ofiles[fd] = 0; 55 ffree(fp); 56 } else { 57 fp->f_data = (caddr_t)so; 58 *retval = fd; 59 } 60 return (error); 61 } 62 63 struct bind_args { 64 int s; 65 caddr_t name; 66 int namelen; 67 }; 68 /* ARGSUSED */ 69 bind(p, uap, retval) 70 struct proc *p; 71 register struct bind_args *uap; 72 int *retval; 73 { 74 struct file *fp; 75 struct mbuf *nam; 76 int error; 77 78 if (error = getsock(p->p_fd, uap->s, &fp)) 79 return (error); 80 if (error = sockargs(&nam, uap->name, uap->namelen, MT_SONAME)) 81 return (error); 82 error = sobind((struct socket *)fp->f_data, nam); 83 m_freem(nam); 84 return (error); 85 } 86 87 struct listen_args { 88 int s; 89 int backlog; 90 }; 91 /* ARGSUSED */ 92 listen(p, uap, retval) 93 struct proc *p; 94 register struct listen_args *uap; 95 int *retval; 96 { 97 struct file *fp; 98 int error; 99 100 if (error = getsock(p->p_fd, uap->s, &fp)) 101 return (error); 102 return (solisten((struct socket *)fp->f_data, uap->backlog)); 103 } 104 105 struct accept_args { 106 int s; 107 caddr_t name; 108 int *anamelen; 109 #ifdef COMPAT_OLDSOCK 110 int compat_43; /* pseudo */ 111 #endif 112 }; 113 114 #ifdef COMPAT_OLDSOCK 115 accept(p, uap, retval) 116 struct proc *p; 117 struct accept_args *uap; 118 int *retval; 119 { 120 121 uap->compat_43 = 0; 122 return (accept1(p, uap, retval)); 123 } 124 125 oaccept(p, uap, retval) 126 struct proc *p; 127 struct accept_args *uap; 128 int *retval; 129 { 130 131 uap->compat_43 = 1; 132 return (accept1(p, uap, retval)); 133 } 134 #else /* COMPAT_OLDSOCK */ 135 136 #define accept1 accept 137 #endif 138 139 accept1(p, uap, retval) 140 struct proc *p; 141 register struct accept_args *uap; 142 int *retval; 143 { 144 struct file *fp; 145 struct mbuf *nam; 146 int namelen, error, s; 147 register struct socket *so; 148 149 if (uap->name && (error = copyin((caddr_t)uap->anamelen, 150 (caddr_t)&namelen, sizeof (namelen)))) 151 return (error); 152 if (error = getsock(p->p_fd, uap->s, &fp)) 153 return (error); 154 s = splnet(); 155 so = (struct socket *)fp->f_data; 156 if ((so->so_options & SO_ACCEPTCONN) == 0) { 157 splx(s); 158 return (EINVAL); 159 } 160 if ((so->so_state & SS_NBIO) && so->so_qlen == 0) { 161 splx(s); 162 return (EWOULDBLOCK); 163 } 164 while (so->so_qlen == 0 && so->so_error == 0) { 165 if (so->so_state & SS_CANTRCVMORE) { 166 so->so_error = ECONNABORTED; 167 break; 168 } 169 if (error = tsleep((caddr_t)&so->so_timeo, PSOCK | PCATCH, 170 netcon, 0)) { 171 splx(s); 172 return (error); 173 } 174 } 175 if (so->so_error) { 176 error = so->so_error; 177 so->so_error = 0; 178 splx(s); 179 return (error); 180 } 181 if (error = falloc(p, &fp, retval)) { 182 splx(s); 183 return (error); 184 } 185 { struct socket *aso = so->so_q; 186 if (soqremque(aso, 1) == 0) 187 panic("accept"); 188 so = aso; 189 } 190 fp->f_type = DTYPE_SOCKET; 191 fp->f_flag = FREAD|FWRITE; 192 fp->f_ops = &socketops; 193 fp->f_data = (caddr_t)so; 194 nam = m_get(M_WAIT, MT_SONAME); 195 (void) soaccept(so, nam); 196 if (uap->name) { 197 #ifdef COMPAT_OLDSOCK 198 if (uap->compat_43) 199 mtod(nam, struct osockaddr *)->sa_family = 200 mtod(nam, struct sockaddr *)->sa_family; 201 #endif 202 if (namelen > nam->m_len) 203 namelen = nam->m_len; 204 /* SHOULD COPY OUT A CHAIN HERE */ 205 if ((error = copyout(mtod(nam, caddr_t), (caddr_t)uap->name, 206 (u_int)namelen)) == 0) 207 error = copyout((caddr_t)&namelen, 208 (caddr_t)uap->anamelen, sizeof (*uap->anamelen)); 209 } 210 m_freem(nam); 211 splx(s); 212 return (error); 213 } 214 215 struct connect_args { 216 int s; 217 caddr_t name; 218 int namelen; 219 }; 220 /* ARGSUSED */ 221 connect(p, uap, retval) 222 struct proc *p; 223 register struct connect_args *uap; 224 int *retval; 225 { 226 struct file *fp; 227 register struct socket *so; 228 struct mbuf *nam; 229 int error, s; 230 231 if (error = getsock(p->p_fd, uap->s, &fp)) 232 return (error); 233 so = (struct socket *)fp->f_data; 234 if ((so->so_state & SS_NBIO) && (so->so_state & SS_ISCONNECTING)) 235 return (EALREADY); 236 if (error = sockargs(&nam, uap->name, uap->namelen, MT_SONAME)) 237 return (error); 238 error = soconnect(so, nam); 239 if (error) 240 goto bad; 241 if ((so->so_state & SS_NBIO) && (so->so_state & SS_ISCONNECTING)) { 242 m_freem(nam); 243 return (EINPROGRESS); 244 } 245 s = splnet(); 246 while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) 247 if (error = tsleep((caddr_t)&so->so_timeo, PSOCK | PCATCH, 248 netcon, 0)) 249 break; 250 if (error == 0) { 251 error = so->so_error; 252 so->so_error = 0; 253 } 254 splx(s); 255 bad: 256 so->so_state &= ~SS_ISCONNECTING; 257 m_freem(nam); 258 if (error == ERESTART) 259 error = EINTR; 260 return (error); 261 } 262 263 struct socketpair_args { 264 int domain; 265 int type; 266 int protocol; 267 int *rsv; 268 }; 269 socketpair(p, uap, retval) 270 struct proc *p; 271 register struct socketpair_args *uap; 272 int retval[]; 273 { 274 register struct filedesc *fdp = p->p_fd; 275 struct file *fp1, *fp2; 276 struct socket *so1, *so2; 277 int fd, error, sv[2]; 278 279 if (error = socreate(uap->domain, &so1, uap->type, uap->protocol)) 280 return (error); 281 if (error = socreate(uap->domain, &so2, uap->type, uap->protocol)) 282 goto free1; 283 if (error = falloc(p, &fp1, &fd)) 284 goto free2; 285 sv[0] = fd; 286 fp1->f_flag = FREAD|FWRITE; 287 fp1->f_type = DTYPE_SOCKET; 288 fp1->f_ops = &socketops; 289 fp1->f_data = (caddr_t)so1; 290 if (error = falloc(p, &fp2, &fd)) 291 goto free3; 292 fp2->f_flag = FREAD|FWRITE; 293 fp2->f_type = DTYPE_SOCKET; 294 fp2->f_ops = &socketops; 295 fp2->f_data = (caddr_t)so2; 296 sv[1] = fd; 297 if (error = soconnect2(so1, so2)) 298 goto free4; 299 if (uap->type == SOCK_DGRAM) { 300 /* 301 * Datagram socket connection is asymmetric. 302 */ 303 if (error = soconnect2(so2, so1)) 304 goto free4; 305 } 306 error = copyout((caddr_t)sv, (caddr_t)uap->rsv, 2 * sizeof (int)); 307 retval[0] = sv[0]; /* XXX ??? */ 308 retval[1] = sv[1]; /* XXX ??? */ 309 return (error); 310 free4: 311 ffree(fp2); 312 fdp->fd_ofiles[sv[1]] = 0; 313 free3: 314 ffree(fp1); 315 fdp->fd_ofiles[sv[0]] = 0; 316 free2: 317 (void)soclose(so2); 318 free1: 319 (void)soclose(so1); 320 return (error); 321 } 322 323 struct sendto_args { 324 int s; 325 caddr_t buf; 326 int len; 327 int flags; 328 caddr_t to; 329 int tolen; 330 }; 331 sendto(p, uap, retval) 332 struct proc *p; 333 register struct sendto_args *uap; 334 int *retval; 335 { 336 struct msghdr msg; 337 struct iovec aiov; 338 int error; 339 340 msg.msg_name = uap->to; 341 msg.msg_namelen = uap->tolen; 342 msg.msg_iov = &aiov; 343 msg.msg_iovlen = 1; 344 msg.msg_control = 0; 345 #ifdef COMPAT_OLDSOCK 346 msg.msg_flags = 0; 347 #endif 348 aiov.iov_base = uap->buf; 349 aiov.iov_len = uap->len; 350 return (sendit(p, uap->s, &msg, uap->flags, retval)); 351 } 352 353 #ifdef COMPAT_OLDSOCK 354 struct osend_args { 355 int s; 356 caddr_t buf; 357 int len; 358 int flags; 359 }; 360 osend(p, uap, retval) 361 struct proc *p; 362 register struct osend_args *uap; 363 int *retval; 364 { 365 struct msghdr msg; 366 struct iovec aiov; 367 368 msg.msg_name = 0; 369 msg.msg_namelen = 0; 370 msg.msg_iov = &aiov; 371 msg.msg_iovlen = 1; 372 aiov.iov_base = uap->buf; 373 aiov.iov_len = uap->len; 374 msg.msg_control = 0; 375 msg.msg_flags = 0; 376 return (sendit(p, uap->s, &msg, uap->flags, retval)); 377 } 378 379 #define MSG_COMPAT 0x8000 380 struct osendmsg_args { 381 int s; 382 caddr_t msg; 383 int flags; 384 }; 385 osendmsg(p, uap, retval) 386 struct proc *p; 387 register struct osendmsg_args *uap; 388 int *retval; 389 { 390 struct msghdr msg; 391 struct iovec aiov[UIO_SMALLIOV], *iov; 392 int error; 393 394 if (error = copyin(uap->msg, (caddr_t)&msg, sizeof (struct omsghdr))) 395 return (error); 396 if ((u_int)msg.msg_iovlen >= UIO_SMALLIOV) { 397 if ((u_int)msg.msg_iovlen >= UIO_MAXIOV) 398 return (EMSGSIZE); 399 MALLOC(iov, struct iovec *, 400 sizeof(struct iovec) * (u_int)msg.msg_iovlen, M_IOV, 401 M_WAITOK); 402 } else 403 iov = aiov; 404 if (error = copyin((caddr_t)msg.msg_iov, (caddr_t)iov, 405 (unsigned)(msg.msg_iovlen * sizeof (struct iovec)))) 406 goto done; 407 msg.msg_flags = MSG_COMPAT; 408 msg.msg_iov = iov; 409 error = sendit(p, uap->s, &msg, uap->flags, retval); 410 done: 411 if (iov != aiov) 412 FREE(iov, M_IOV); 413 return (error); 414 } 415 #endif 416 417 struct sendmsg_args { 418 int s; 419 caddr_t msg; 420 int flags; 421 }; 422 sendmsg(p, uap, retval) 423 struct proc *p; 424 register struct sendmsg_args *uap; 425 int *retval; 426 { 427 struct msghdr msg; 428 struct iovec aiov[UIO_SMALLIOV], *iov; 429 int error; 430 431 if (error = copyin(uap->msg, (caddr_t)&msg, sizeof (msg))) 432 return (error); 433 if ((u_int)msg.msg_iovlen >= UIO_SMALLIOV) { 434 if ((u_int)msg.msg_iovlen >= UIO_MAXIOV) 435 return (EMSGSIZE); 436 MALLOC(iov, struct iovec *, 437 sizeof(struct iovec) * (u_int)msg.msg_iovlen, M_IOV, 438 M_WAITOK); 439 } else 440 iov = aiov; 441 if (msg.msg_iovlen && 442 (error = copyin((caddr_t)msg.msg_iov, (caddr_t)iov, 443 (unsigned)(msg.msg_iovlen * sizeof (struct iovec))))) 444 goto done; 445 msg.msg_iov = iov; 446 #ifdef COMPAT_OLDSOCK 447 msg.msg_flags = 0; 448 #endif 449 error = sendit(p, uap->s, &msg, uap->flags, retval); 450 done: 451 if (iov != aiov) 452 FREE(iov, M_IOV); 453 return (error); 454 } 455 456 sendit(p, s, mp, flags, retsize) 457 register struct proc *p; 458 int s; 459 register struct msghdr *mp; 460 int flags, *retsize; 461 { 462 struct file *fp; 463 struct uio auio; 464 register struct iovec *iov; 465 register int i; 466 struct mbuf *to, *control; 467 int len, error; 468 #ifdef KTRACE 469 struct iovec *ktriov = NULL; 470 #endif 471 472 if (error = getsock(p->p_fd, s, &fp)) 473 return (error); 474 auio.uio_iov = mp->msg_iov; 475 auio.uio_iovcnt = mp->msg_iovlen; 476 auio.uio_segflg = UIO_USERSPACE; 477 auio.uio_rw = UIO_WRITE; 478 auio.uio_procp = p; 479 auio.uio_offset = 0; /* XXX */ 480 auio.uio_resid = 0; 481 iov = mp->msg_iov; 482 for (i = 0; i < mp->msg_iovlen; i++, iov++) { 483 if (iov->iov_len < 0) 484 return (EINVAL); 485 if ((auio.uio_resid += iov->iov_len) < 0) 486 return (EINVAL); 487 } 488 if (mp->msg_name) { 489 if (error = sockargs(&to, mp->msg_name, mp->msg_namelen, 490 MT_SONAME)) 491 return (error); 492 } else 493 to = 0; 494 if (mp->msg_control) { 495 if (mp->msg_controllen < sizeof(struct cmsghdr) 496 #ifdef COMPAT_OLDSOCK 497 && mp->msg_flags != MSG_COMPAT 498 #endif 499 ) { 500 error = EINVAL; 501 goto bad; 502 } 503 if (error = sockargs(&control, mp->msg_control, 504 mp->msg_controllen, MT_CONTROL)) 505 goto bad; 506 #ifdef COMPAT_OLDSOCK 507 if (mp->msg_flags == MSG_COMPAT) { 508 register struct cmsghdr *cm; 509 510 M_PREPEND(control, sizeof(*cm), M_WAIT); 511 if (control == 0) { 512 error = ENOBUFS; 513 goto bad; 514 } else { 515 cm = mtod(control, struct cmsghdr *); 516 cm->cmsg_len = control->m_len; 517 cm->cmsg_level = SOL_SOCKET; 518 cm->cmsg_type = SCM_RIGHTS; 519 } 520 } 521 #endif 522 } else 523 control = 0; 524 #ifdef KTRACE 525 if (KTRPOINT(p, KTR_GENIO)) { 526 int iovlen = auio.uio_iovcnt * sizeof (struct iovec); 527 528 MALLOC(ktriov, struct iovec *, iovlen, M_TEMP, M_WAITOK); 529 bcopy((caddr_t)auio.uio_iov, (caddr_t)ktriov, iovlen); 530 } 531 #endif 532 len = auio.uio_resid; 533 if (error = sosend((struct socket *)fp->f_data, to, &auio, 534 (struct mbuf *)0, control, flags)) { 535 if (auio.uio_resid != len && (error == ERESTART || 536 error == EINTR || error == EWOULDBLOCK)) 537 error = 0; 538 if (error == EPIPE) 539 psignal(p, SIGPIPE); 540 } 541 if (error == 0) 542 *retsize = len - auio.uio_resid; 543 #ifdef KTRACE 544 if (ktriov != NULL) { 545 if (error == 0) 546 ktrgenio(p->p_tracep, s, UIO_WRITE, 547 ktriov, *retsize, error); 548 FREE(ktriov, M_TEMP); 549 } 550 #endif 551 bad: 552 if (to) 553 m_freem(to); 554 return (error); 555 } 556 557 struct recvfrom_args { 558 int s; 559 caddr_t buf; 560 int len; 561 int flags; 562 caddr_t from; 563 int *fromlenaddr; 564 }; 565 566 #ifdef COMPAT_OLDSOCK 567 orecvfrom(p, uap, retval) 568 struct proc *p; 569 struct recvfrom_args *uap; 570 int *retval; 571 { 572 573 uap->flags |= MSG_COMPAT; 574 return (recvfrom(p, uap, retval)); 575 } 576 #endif 577 578 recvfrom(p, uap, retval) 579 struct proc *p; 580 register struct recvfrom_args *uap; 581 int *retval; 582 { 583 struct msghdr msg; 584 struct iovec aiov; 585 int error; 586 587 if (uap->fromlenaddr) { 588 if (error = copyin((caddr_t)uap->fromlenaddr, 589 (caddr_t)&msg.msg_namelen, sizeof (msg.msg_namelen))) 590 return (error); 591 } else 592 msg.msg_namelen = 0; 593 msg.msg_name = uap->from; 594 msg.msg_iov = &aiov; 595 msg.msg_iovlen = 1; 596 aiov.iov_base = uap->buf; 597 aiov.iov_len = uap->len; 598 msg.msg_control = 0; 599 msg.msg_flags = uap->flags; 600 return (recvit(p, uap->s, &msg, (caddr_t)uap->fromlenaddr, retval)); 601 } 602 603 #ifdef COMPAT_OLDSOCK 604 struct orecv_args { 605 int s; 606 caddr_t buf; 607 int len; 608 int flags; 609 }; 610 orecv(p, uap, retval) 611 struct proc *p; 612 register struct orecv_args *uap; 613 int *retval; 614 { 615 struct msghdr msg; 616 struct iovec aiov; 617 618 msg.msg_name = 0; 619 msg.msg_namelen = 0; 620 msg.msg_iov = &aiov; 621 msg.msg_iovlen = 1; 622 aiov.iov_base = uap->buf; 623 aiov.iov_len = uap->len; 624 msg.msg_control = 0; 625 msg.msg_flags = uap->flags; 626 return (recvit(p, uap->s, &msg, (caddr_t)0, retval)); 627 } 628 629 /* 630 * Old recvmsg. This code takes advantage of the fact that the old msghdr 631 * overlays the new one, missing only the flags, and with the (old) access 632 * rights where the control fields are now. 633 */ 634 struct orecvmsg_args { 635 int s; 636 struct omsghdr *msg; 637 int flags; 638 }; 639 orecvmsg(p, uap, retval) 640 struct proc *p; 641 register struct orecvmsg_args *uap; 642 int *retval; 643 { 644 struct msghdr msg; 645 struct iovec aiov[UIO_SMALLIOV], *iov; 646 int error; 647 648 if (error = copyin((caddr_t)uap->msg, (caddr_t)&msg, 649 sizeof (struct omsghdr))) 650 return (error); 651 if ((u_int)msg.msg_iovlen >= UIO_SMALLIOV) { 652 if ((u_int)msg.msg_iovlen >= UIO_MAXIOV) 653 return (EMSGSIZE); 654 MALLOC(iov, struct iovec *, 655 sizeof(struct iovec) * (u_int)msg.msg_iovlen, M_IOV, 656 M_WAITOK); 657 } else 658 iov = aiov; 659 msg.msg_flags = uap->flags | MSG_COMPAT; 660 if (error = copyin((caddr_t)msg.msg_iov, (caddr_t)iov, 661 (unsigned)(msg.msg_iovlen * sizeof (struct iovec)))) 662 goto done; 663 msg.msg_iov = iov; 664 error = recvit(p, uap->s, &msg, (caddr_t)&uap->msg->msg_namelen, retval); 665 666 if (msg.msg_controllen && error == 0) 667 error = copyout((caddr_t)&msg.msg_controllen, 668 (caddr_t)&uap->msg->msg_accrightslen, sizeof (int)); 669 done: 670 if (iov != aiov) 671 FREE(iov, M_IOV); 672 return (error); 673 } 674 #endif 675 676 struct recvmsg_args { 677 int s; 678 struct msghdr *msg; 679 int flags; 680 }; 681 recvmsg(p, uap, retval) 682 struct proc *p; 683 register struct recvmsg_args *uap; 684 int *retval; 685 { 686 struct msghdr msg; 687 struct iovec aiov[UIO_SMALLIOV], *uiov, *iov; 688 register int error; 689 690 if (error = copyin((caddr_t)uap->msg, (caddr_t)&msg, sizeof (msg))) 691 return (error); 692 if ((u_int)msg.msg_iovlen >= UIO_SMALLIOV) { 693 if ((u_int)msg.msg_iovlen >= UIO_MAXIOV) 694 return (EMSGSIZE); 695 MALLOC(iov, struct iovec *, 696 sizeof(struct iovec) * (u_int)msg.msg_iovlen, M_IOV, 697 M_WAITOK); 698 } else 699 iov = aiov; 700 #ifdef COMPAT_OLDSOCK 701 msg.msg_flags = uap->flags &~ MSG_COMPAT; 702 #else 703 msg.msg_flags = uap->flags; 704 #endif 705 uiov = msg.msg_iov; 706 msg.msg_iov = iov; 707 if (error = copyin((caddr_t)uiov, (caddr_t)iov, 708 (unsigned)(msg.msg_iovlen * sizeof (struct iovec)))) 709 goto done; 710 if ((error = recvit(p, uap->s, &msg, (caddr_t)0, retval)) == 0) { 711 msg.msg_iov = uiov; 712 error = copyout((caddr_t)&msg, (caddr_t)uap->msg, sizeof(msg)); 713 } 714 done: 715 if (iov != aiov) 716 FREE(iov, M_IOV); 717 return (error); 718 } 719 720 recvit(p, s, mp, namelenp, retsize) 721 register struct proc *p; 722 int s; 723 register struct msghdr *mp; 724 caddr_t namelenp; 725 int *retsize; 726 { 727 struct file *fp; 728 struct uio auio; 729 register struct iovec *iov; 730 register int i; 731 int len, error; 732 struct mbuf *from = 0, *control = 0; 733 #ifdef KTRACE 734 struct iovec *ktriov = NULL; 735 #endif 736 737 if (error = getsock(p->p_fd, s, &fp)) 738 return (error); 739 auio.uio_iov = mp->msg_iov; 740 auio.uio_iovcnt = mp->msg_iovlen; 741 auio.uio_segflg = UIO_USERSPACE; 742 auio.uio_rw = UIO_READ; 743 auio.uio_procp = p; 744 auio.uio_offset = 0; /* XXX */ 745 auio.uio_resid = 0; 746 iov = mp->msg_iov; 747 for (i = 0; i < mp->msg_iovlen; i++, iov++) { 748 if (iov->iov_len < 0) 749 return (EINVAL); 750 if ((auio.uio_resid += iov->iov_len) < 0) 751 return (EINVAL); 752 } 753 #ifdef KTRACE 754 if (KTRPOINT(p, KTR_GENIO)) { 755 int iovlen = auio.uio_iovcnt * sizeof (struct iovec); 756 757 MALLOC(ktriov, struct iovec *, iovlen, M_TEMP, M_WAITOK); 758 bcopy((caddr_t)auio.uio_iov, (caddr_t)ktriov, iovlen); 759 } 760 #endif 761 len = auio.uio_resid; 762 if (error = soreceive((struct socket *)fp->f_data, &from, &auio, 763 (struct mbuf **)0, mp->msg_control ? &control : (struct mbuf **)0, 764 &mp->msg_flags)) { 765 if (auio.uio_resid != len && (error == ERESTART || 766 error == EINTR || error == EWOULDBLOCK)) 767 error = 0; 768 } 769 #ifdef KTRACE 770 if (ktriov != NULL) { 771 if (error == 0) 772 ktrgenio(p->p_tracep, s, UIO_READ, 773 ktriov, len - auio.uio_resid, error); 774 FREE(ktriov, M_TEMP); 775 } 776 #endif 777 if (error) 778 goto out; 779 *retsize = len - auio.uio_resid; 780 if (mp->msg_name) { 781 len = mp->msg_namelen; 782 if (len <= 0 || from == 0) 783 len = 0; 784 else { 785 #ifdef COMPAT_OLDSOCK 786 if (mp->msg_flags & MSG_COMPAT) 787 mtod(from, struct osockaddr *)->sa_family = 788 mtod(from, struct sockaddr *)->sa_family; 789 #endif 790 if (len > from->m_len) 791 len = from->m_len; 792 /* else if len < from->m_len ??? */ 793 if (error = copyout(mtod(from, caddr_t), 794 (caddr_t)mp->msg_name, (unsigned)len)) 795 goto out; 796 } 797 mp->msg_namelen = len; 798 if (namelenp && 799 (error = copyout((caddr_t)&len, namelenp, sizeof (int)))) { 800 #ifdef COMPAT_OLDSOCK 801 if (mp->msg_flags & MSG_COMPAT) 802 error = 0; /* old recvfrom didn't check */ 803 else 804 #endif 805 goto out; 806 } 807 } 808 if (mp->msg_control) { 809 #ifdef COMPAT_OLDSOCK 810 /* 811 * We assume that old recvmsg calls won't receive access 812 * rights and other control info, esp. as control info 813 * is always optional and those options didn't exist in 4.3. 814 * If we receive rights, trim the cmsghdr; anything else 815 * is tossed. 816 */ 817 if (control && mp->msg_flags & MSG_COMPAT) { 818 if (mtod(control, struct cmsghdr *)->cmsg_level != 819 SOL_SOCKET || 820 mtod(control, struct cmsghdr *)->cmsg_type != 821 SCM_RIGHTS) { 822 mp->msg_controllen = 0; 823 goto out; 824 } 825 control->m_len -= sizeof (struct cmsghdr); 826 control->m_data += sizeof (struct cmsghdr); 827 } 828 #endif 829 len = mp->msg_controllen; 830 if (len <= 0 || control == 0) 831 len = 0; 832 else { 833 if (len >= control->m_len) 834 len = control->m_len; 835 else 836 mp->msg_flags |= MSG_CTRUNC; 837 error = copyout((caddr_t)mtod(control, caddr_t), 838 (caddr_t)mp->msg_control, (unsigned)len); 839 } 840 mp->msg_controllen = len; 841 } 842 out: 843 if (from) 844 m_freem(from); 845 if (control) 846 m_freem(control); 847 return (error); 848 } 849 850 struct shutdown_args { 851 int s; 852 int how; 853 }; 854 /* ARGSUSED */ 855 shutdown(p, uap, retval) 856 struct proc *p; 857 register struct shutdown_args *uap; 858 int *retval; 859 { 860 struct file *fp; 861 int error; 862 863 if (error = getsock(p->p_fd, uap->s, &fp)) 864 return (error); 865 return (soshutdown((struct socket *)fp->f_data, uap->how)); 866 } 867 868 struct setsockopt_args { 869 int s; 870 int level; 871 int name; 872 caddr_t val; 873 int valsize; 874 }; 875 /* ARGSUSED */ 876 setsockopt(p, uap, retval) 877 struct proc *p; 878 register struct setsockopt_args *uap; 879 int *retval; 880 { 881 struct file *fp; 882 struct mbuf *m = NULL; 883 int error; 884 885 if (error = getsock(p->p_fd, uap->s, &fp)) 886 return (error); 887 if (uap->valsize > MLEN) 888 return (EINVAL); 889 if (uap->val) { 890 m = m_get(M_WAIT, MT_SOOPTS); 891 if (m == NULL) 892 return (ENOBUFS); 893 if (error = copyin(uap->val, mtod(m, caddr_t), 894 (u_int)uap->valsize)) { 895 (void) m_free(m); 896 return (error); 897 } 898 m->m_len = uap->valsize; 899 } 900 return (sosetopt((struct socket *)fp->f_data, uap->level, 901 uap->name, m)); 902 } 903 904 struct getsockopt_args { 905 int s; 906 int level; 907 int name; 908 caddr_t val; 909 int *avalsize; 910 }; 911 /* ARGSUSED */ 912 getsockopt(p, uap, retval) 913 struct proc *p; 914 register struct getsockopt_args *uap; 915 int *retval; 916 { 917 struct file *fp; 918 struct mbuf *m = NULL; 919 int valsize, error; 920 921 if (error = getsock(p->p_fd, uap->s, &fp)) 922 return (error); 923 if (uap->val) { 924 if (error = copyin((caddr_t)uap->avalsize, (caddr_t)&valsize, 925 sizeof (valsize))) 926 return (error); 927 } else 928 valsize = 0; 929 if ((error = sogetopt((struct socket *)fp->f_data, uap->level, 930 uap->name, &m)) == 0 && uap->val && valsize && m != NULL) { 931 if (valsize > m->m_len) 932 valsize = m->m_len; 933 error = copyout(mtod(m, caddr_t), uap->val, (u_int)valsize); 934 if (error == 0) 935 error = copyout((caddr_t)&valsize, 936 (caddr_t)uap->avalsize, sizeof (valsize)); 937 } 938 if (m != NULL) 939 (void) m_free(m); 940 return (error); 941 } 942 943 struct pipe_args { 944 int dummy; 945 }; 946 /* ARGSUSED */ 947 pipe(p, uap, retval) 948 struct proc *p; 949 struct pipe_args *uap; 950 int retval[]; 951 { 952 register struct filedesc *fdp = p->p_fd; 953 struct file *rf, *wf; 954 struct socket *rso, *wso; 955 int fd, error; 956 957 if (error = socreate(AF_UNIX, &rso, SOCK_STREAM, 0)) 958 return (error); 959 if (error = socreate(AF_UNIX, &wso, SOCK_STREAM, 0)) 960 goto free1; 961 if (error = falloc(p, &rf, &fd)) 962 goto free2; 963 retval[0] = fd; 964 rf->f_flag = FREAD; 965 rf->f_type = DTYPE_SOCKET; 966 rf->f_ops = &socketops; 967 rf->f_data = (caddr_t)rso; 968 if (error = falloc(p, &wf, &fd)) 969 goto free3; 970 wf->f_flag = FWRITE; 971 wf->f_type = DTYPE_SOCKET; 972 wf->f_ops = &socketops; 973 wf->f_data = (caddr_t)wso; 974 retval[1] = fd; 975 if (error = unp_connect2(wso, rso)) 976 goto free4; 977 return (0); 978 free4: 979 ffree(wf); 980 fdp->fd_ofiles[retval[1]] = 0; 981 free3: 982 ffree(rf); 983 fdp->fd_ofiles[retval[0]] = 0; 984 free2: 985 (void)soclose(wso); 986 free1: 987 (void)soclose(rso); 988 return (error); 989 } 990 991 /* 992 * Get socket name. 993 */ 994 struct getsockname_args { 995 int fdes; 996 caddr_t asa; 997 int *alen; 998 #ifdef COMPAT_OLDSOCK 999 int compat_43; /* pseudo */ 1000 #endif 1001 }; 1002 #ifdef COMPAT_OLDSOCK 1003 getsockname(p, uap, retval) 1004 struct proc *p; 1005 struct getsockname_args *uap; 1006 int *retval; 1007 { 1008 1009 uap->compat_43 = 0; 1010 return (getsockname1(p, uap, retval)); 1011 } 1012 1013 ogetsockname(p, uap, retval) 1014 struct proc *p; 1015 struct getsockname_args *uap; 1016 int *retval; 1017 { 1018 1019 uap->compat_43 = 1; 1020 return (getsockname1(p, uap, retval)); 1021 } 1022 #else /* COMPAT_OLDSOCK */ 1023 1024 #define getsockname1 getsockname 1025 #endif 1026 1027 /* ARGSUSED */ 1028 getsockname1(p, uap, retval) 1029 struct proc *p; 1030 register struct getsockname_args *uap; 1031 int *retval; 1032 { 1033 struct file *fp; 1034 register struct socket *so; 1035 struct mbuf *m; 1036 int len, error; 1037 1038 if (error = getsock(p->p_fd, uap->fdes, &fp)) 1039 return (error); 1040 if (error = copyin((caddr_t)uap->alen, (caddr_t)&len, sizeof (len))) 1041 return (error); 1042 so = (struct socket *)fp->f_data; 1043 m = m_getclr(M_WAIT, MT_SONAME); 1044 if (m == NULL) 1045 return (ENOBUFS); 1046 if (error = (*so->so_proto->pr_usrreq)(so, PRU_SOCKADDR, 0, m, 0)) 1047 goto bad; 1048 if (len > m->m_len) 1049 len = m->m_len; 1050 #ifdef COMPAT_OLDSOCK 1051 if (uap->compat_43) 1052 mtod(m, struct osockaddr *)->sa_family = 1053 mtod(m, struct sockaddr *)->sa_family; 1054 #endif 1055 error = copyout(mtod(m, caddr_t), (caddr_t)uap->asa, (u_int)len); 1056 if (error == 0) 1057 error = copyout((caddr_t)&len, (caddr_t)uap->alen, 1058 sizeof (len)); 1059 bad: 1060 m_freem(m); 1061 return (error); 1062 } 1063 1064 /* 1065 * Get name of peer for connected socket. 1066 */ 1067 struct getpeername_args { 1068 int fdes; 1069 caddr_t asa; 1070 int *alen; 1071 #ifdef COMPAT_OLDSOCK 1072 int compat_43; /* pseudo */ 1073 #endif 1074 }; 1075 1076 #ifdef COMPAT_OLDSOCK 1077 getpeername(p, uap, retval) 1078 struct proc *p; 1079 struct getpeername_args *uap; 1080 int *retval; 1081 { 1082 1083 uap->compat_43 = 0; 1084 return (getpeername1(p, uap, retval)); 1085 } 1086 1087 ogetpeername(p, uap, retval) 1088 struct proc *p; 1089 struct getpeername_args *uap; 1090 int *retval; 1091 { 1092 1093 uap->compat_43 = 1; 1094 return (getpeername1(p, uap, retval)); 1095 } 1096 #else /* COMPAT_OLDSOCK */ 1097 1098 #define getpeername1 getpeername 1099 #endif 1100 1101 /* ARGSUSED */ 1102 getpeername1(p, uap, retval) 1103 struct proc *p; 1104 register struct getpeername_args *uap; 1105 int *retval; 1106 { 1107 struct file *fp; 1108 register struct socket *so; 1109 struct mbuf *m; 1110 int len, error; 1111 1112 if (error = getsock(p->p_fd, uap->fdes, &fp)) 1113 return (error); 1114 so = (struct socket *)fp->f_data; 1115 if ((so->so_state & (SS_ISCONNECTED|SS_ISCONFIRMING)) == 0) 1116 return (ENOTCONN); 1117 if (error = copyin((caddr_t)uap->alen, (caddr_t)&len, sizeof (len))) 1118 return (error); 1119 m = m_getclr(M_WAIT, MT_SONAME); 1120 if (m == NULL) 1121 return (ENOBUFS); 1122 if (error = (*so->so_proto->pr_usrreq)(so, PRU_PEERADDR, 0, m, 0)) 1123 goto bad; 1124 if (len > m->m_len) 1125 len = m->m_len; 1126 #ifdef COMPAT_OLDSOCK 1127 if (uap->compat_43) 1128 mtod(m, struct osockaddr *)->sa_family = 1129 mtod(m, struct sockaddr *)->sa_family; 1130 #endif 1131 if (error = copyout(mtod(m, caddr_t), (caddr_t)uap->asa, (u_int)len)) 1132 goto bad; 1133 error = copyout((caddr_t)&len, (caddr_t)uap->alen, sizeof (len)); 1134 bad: 1135 m_freem(m); 1136 return (error); 1137 } 1138 1139 sockargs(mp, buf, buflen, type) 1140 struct mbuf **mp; 1141 caddr_t buf; 1142 int buflen, type; 1143 { 1144 register struct sockaddr *sa; 1145 register struct mbuf *m; 1146 int error; 1147 1148 if ((u_int)buflen > MLEN) { 1149 #ifdef COMPAT_OLDSOCK 1150 if (type == MT_SONAME && (u_int)buflen <= 112) 1151 buflen = MLEN; /* unix domain compat. hack */ 1152 else 1153 #endif 1154 return (EINVAL); 1155 } 1156 m = m_get(M_WAIT, type); 1157 if (m == NULL) 1158 return (ENOBUFS); 1159 m->m_len = buflen; 1160 error = copyin(buf, mtod(m, caddr_t), (u_int)buflen); 1161 if (error) 1162 (void) m_free(m); 1163 else { 1164 *mp = m; 1165 if (type == MT_SONAME) { 1166 sa = mtod(m, struct sockaddr *); 1167 1168 #if defined(COMPAT_OLDSOCK) && BYTE_ORDER != BIG_ENDIAN 1169 if (sa->sa_family == 0 && sa->sa_len < AF_MAX) 1170 sa->sa_family = sa->sa_len; 1171 #endif 1172 sa->sa_len = buflen; 1173 } 1174 } 1175 return (error); 1176 } 1177 1178 getsock(fdp, fdes, fpp) 1179 struct filedesc *fdp; 1180 int fdes; 1181 struct file **fpp; 1182 { 1183 register struct file *fp; 1184 1185 if ((unsigned)fdes >= fdp->fd_nfiles || 1186 (fp = fdp->fd_ofiles[fdes]) == NULL) 1187 return (EBADF); 1188 if (fp->f_type != DTYPE_SOCKET) 1189 return (ENOTSOCK); 1190 *fpp = fp; 1191 return (0); 1192 } 1193