1 /* 2 * Copyright (c) 1982, 1986, 1989, 1990 Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 * @(#)uipc_syscalls.c 7.21 (Berkeley) 01/10/91 8 */ 9 10 #include "param.h" 11 #include "user.h" 12 #include "filedesc.h" 13 #include "proc.h" 14 #include "file.h" 15 #include "buf.h" 16 #include "malloc.h" 17 #include "mbuf.h" 18 #include "protosw.h" 19 #include "socket.h" 20 #include "socketvar.h" 21 #ifdef KTRACE 22 #include "ktrace.h" 23 #endif 24 25 /* 26 * System call interface to the socket abstraction. 27 */ 28 29 extern struct fileops socketops; 30 31 socket(p, uap, retval) 32 struct proc *p; 33 register struct args { 34 int domain; 35 int type; 36 int protocol; 37 } *uap; 38 int *retval; 39 { 40 struct filedesc *fdp = p->p_fd; 41 struct socket *so; 42 struct file *fp; 43 int fd, error; 44 45 if (error = falloc(p, &fp, &fd)) 46 return (error); 47 fp->f_flag = FREAD|FWRITE; 48 fp->f_type = DTYPE_SOCKET; 49 fp->f_ops = &socketops; 50 if (error = socreate(uap->domain, &so, uap->type, uap->protocol)) { 51 OFILE(fdp, fd) = 0; 52 crfree(fp->f_cred); 53 fp->f_count = 0; 54 } else { 55 fp->f_data = (caddr_t)so; 56 *retval = fd; 57 } 58 return (error); 59 } 60 61 /* ARGSUSED */ 62 bind(p, uap, retval) 63 struct proc *p; 64 register struct args { 65 int s; 66 caddr_t name; 67 int namelen; 68 } *uap; 69 int *retval; 70 { 71 struct file *fp; 72 struct mbuf *nam; 73 int error; 74 75 if (error = getsock(p->p_fd, uap->s, &fp)) 76 return (error); 77 if (error = sockargs(&nam, uap->name, uap->namelen, MT_SONAME)) 78 return (error); 79 error = sobind((struct socket *)fp->f_data, nam); 80 m_freem(nam); 81 return (error); 82 } 83 84 /* ARGSUSED */ 85 listen(p, uap, retval) 86 struct proc *p; 87 register struct args { 88 int s; 89 int backlog; 90 } *uap; 91 int *retval; 92 { 93 struct file *fp; 94 int error; 95 96 if (error = getsock(p->p_fd, uap->s, &fp)) 97 return (error); 98 return (solisten((struct socket *)fp->f_data, uap->backlog)); 99 } 100 101 #ifdef COMPAT_43 102 accept(p, uap, retval) 103 struct proc *p; 104 struct args { 105 int s; 106 caddr_t name; 107 int *anamelen; 108 int compat_43; 109 } *uap; 110 int *retval; 111 { 112 113 uap->compat_43 = 0; 114 return (accept1(p, uap, retval)); 115 } 116 117 oaccept(p, uap, retval) 118 struct proc *p; 119 struct args { 120 int s; 121 caddr_t name; 122 int *anamelen; 123 int compat_43; 124 } *uap; 125 int *retval; 126 { 127 128 uap->compat_43 = 1; 129 return (accept1(p, uap, retval)); 130 } 131 #else /* COMPAT_43 */ 132 133 #define accept1 accept 134 #endif 135 136 accept1(p, uap, retval) 137 struct proc *p; 138 register struct args { 139 int s; 140 caddr_t name; 141 int *anamelen; 142 #ifdef COMPAT_43 143 int compat_43; 144 #endif 145 } *uap; 146 int *retval; 147 { 148 struct file *fp; 149 struct mbuf *nam; 150 int namelen, error, s; 151 register struct socket *so; 152 153 if (uap->name && (error = copyin((caddr_t)uap->anamelen, 154 (caddr_t)&namelen, sizeof (namelen)))) 155 return (error); 156 if (error = getsock(p->p_fd, uap->s, &fp)) 157 return (error); 158 s = splnet(); 159 so = (struct socket *)fp->f_data; 160 if ((so->so_options & SO_ACCEPTCONN) == 0) { 161 splx(s); 162 return (EINVAL); 163 } 164 if ((so->so_state & SS_NBIO) && so->so_qlen == 0) { 165 splx(s); 166 return (EWOULDBLOCK); 167 } 168 while (so->so_qlen == 0 && so->so_error == 0) { 169 if (so->so_state & SS_CANTRCVMORE) { 170 so->so_error = ECONNABORTED; 171 break; 172 } 173 if (error = tsleep((caddr_t)&so->so_timeo, PSOCK | PCATCH, 174 netcon, 0)) { 175 splx(s); 176 return (error); 177 } 178 } 179 if (so->so_error) { 180 error = so->so_error; 181 so->so_error = 0; 182 splx(s); 183 return (error); 184 } 185 if (error = falloc(p, &fp, retval)) { 186 splx(s); 187 return (error); 188 } 189 { struct socket *aso = so->so_q; 190 if (soqremque(aso, 1) == 0) 191 panic("accept"); 192 so = aso; 193 } 194 fp->f_type = DTYPE_SOCKET; 195 fp->f_flag = FREAD|FWRITE; 196 fp->f_ops = &socketops; 197 fp->f_data = (caddr_t)so; 198 nam = m_get(M_WAIT, MT_SONAME); 199 (void) soaccept(so, nam); 200 if (uap->name) { 201 #ifdef COMPAT_43 202 if (uap->compat_43) 203 mtod(nam, struct osockaddr *)->sa_family = 204 mtod(nam, struct sockaddr *)->sa_family; 205 #endif 206 if (namelen > nam->m_len) 207 namelen = nam->m_len; 208 /* SHOULD COPY OUT A CHAIN HERE */ 209 if ((error = copyout(mtod(nam, caddr_t), (caddr_t)uap->name, 210 (u_int)namelen)) == 0) 211 error = copyout((caddr_t)&namelen, 212 (caddr_t)uap->anamelen, sizeof (*uap->anamelen)); 213 } 214 m_freem(nam); 215 splx(s); 216 return (error); 217 } 218 219 /* ARGSUSED */ 220 connect(p, uap, retval) 221 struct proc *p; 222 register struct args { 223 int s; 224 caddr_t name; 225 int namelen; 226 } *uap; 227 int *retval; 228 { 229 struct file *fp; 230 register struct socket *so; 231 struct mbuf *nam; 232 int error, s; 233 234 if (error = getsock(p->p_fd, uap->s, &fp)) 235 return (error); 236 so = (struct socket *)fp->f_data; 237 if ((so->so_state & SS_NBIO) && (so->so_state & SS_ISCONNECTING)) 238 return (EALREADY); 239 if (error = sockargs(&nam, uap->name, uap->namelen, MT_SONAME)) 240 return (error); 241 error = soconnect(so, nam); 242 if (error) 243 goto bad; 244 if ((so->so_state & SS_NBIO) && (so->so_state & SS_ISCONNECTING)) { 245 m_freem(nam); 246 return (EINPROGRESS); 247 } 248 s = splnet(); 249 while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) 250 if (error = tsleep((caddr_t)&so->so_timeo, PSOCK | PCATCH, 251 netcon, 0)) 252 break; 253 if (error == 0) { 254 error = so->so_error; 255 so->so_error = 0; 256 } 257 splx(s); 258 bad: 259 so->so_state &= ~SS_ISCONNECTING; 260 m_freem(nam); 261 if (error == ERESTART) 262 error = EINTR; 263 return (error); 264 } 265 266 socketpair(p, uap, retval) 267 struct proc *p; 268 register struct args { 269 int domain; 270 int type; 271 int protocol; 272 int *rsv; 273 } *uap; 274 int retval[]; 275 { 276 register struct filedesc *fdp = p->p_fd; 277 struct file *fp1, *fp2; 278 struct socket *so1, *so2; 279 int fd, error, sv[2]; 280 281 if (error = socreate(uap->domain, &so1, uap->type, uap->protocol)) 282 return (error); 283 if (error = socreate(uap->domain, &so2, uap->type, uap->protocol)) 284 goto free1; 285 if (error = falloc(p, &fp1, &fd)) 286 goto free2; 287 sv[0] = fd; 288 fp1->f_flag = FREAD|FWRITE; 289 fp1->f_type = DTYPE_SOCKET; 290 fp1->f_ops = &socketops; 291 fp1->f_data = (caddr_t)so1; 292 if (error = falloc(p, &fp2, &fd)) 293 goto free3; 294 fp2->f_flag = FREAD|FWRITE; 295 fp2->f_type = DTYPE_SOCKET; 296 fp2->f_ops = &socketops; 297 fp2->f_data = (caddr_t)so2; 298 sv[1] = fd; 299 if (error = soconnect2(so1, so2)) 300 goto free4; 301 if (uap->type == SOCK_DGRAM) { 302 /* 303 * Datagram socket connection is asymmetric. 304 */ 305 if (error = soconnect2(so2, so1)) 306 goto free4; 307 } 308 error = copyout((caddr_t)sv, (caddr_t)uap->rsv, 2 * sizeof (int)); 309 retval[0] = sv[0]; /* XXX ??? */ 310 retval[1] = sv[1]; /* XXX ??? */ 311 return (error); 312 free4: 313 crfree(fp2->f_cred); 314 fp2->f_count = 0; 315 OFILE(fdp, sv[1]) = 0; 316 free3: 317 crfree(fp1->f_cred); 318 fp1->f_count = 0; 319 OFILE(fdp, sv[0]) = 0; 320 free2: 321 (void)soclose(so2); 322 free1: 323 (void)soclose(so1); 324 return (error); 325 } 326 327 sendto(p, uap, retval) 328 struct proc *p; 329 register struct args { 330 int s; 331 caddr_t buf; 332 int len; 333 int flags; 334 caddr_t to; 335 int tolen; 336 } *uap; 337 int *retval; 338 { 339 struct msghdr msg; 340 struct iovec aiov; 341 int error; 342 343 msg.msg_name = uap->to; 344 msg.msg_namelen = uap->tolen; 345 msg.msg_iov = &aiov; 346 msg.msg_iovlen = 1; 347 msg.msg_control = 0; 348 #ifdef COMPAT_43 349 msg.msg_flags = 0; 350 #endif 351 aiov.iov_base = uap->buf; 352 aiov.iov_len = uap->len; 353 return (sendit(p, uap->s, &msg, uap->flags, retval)); 354 } 355 356 #ifdef COMPAT_43 357 osend(p, uap, retval) 358 struct proc *p; 359 register struct args { 360 int s; 361 caddr_t buf; 362 int len; 363 int flags; 364 } *uap; 365 int *retval; 366 { 367 struct msghdr msg; 368 struct iovec aiov; 369 370 msg.msg_name = 0; 371 msg.msg_namelen = 0; 372 msg.msg_iov = &aiov; 373 msg.msg_iovlen = 1; 374 aiov.iov_base = uap->buf; 375 aiov.iov_len = uap->len; 376 msg.msg_control = 0; 377 msg.msg_flags = 0; 378 return (sendit(p, uap->s, &msg, uap->flags, retval)); 379 } 380 381 #define MSG_COMPAT 0x8000 382 osendmsg(p, uap, retval) 383 struct proc *p; 384 register struct args { 385 int s; 386 caddr_t msg; 387 int flags; 388 } *uap; 389 int *retval; 390 { 391 struct msghdr msg; 392 struct iovec aiov[UIO_SMALLIOV], *iov; 393 int error; 394 395 if (error = copyin(uap->msg, (caddr_t)&msg, sizeof (struct omsghdr))) 396 return (error); 397 if ((u_int)msg.msg_iovlen >= UIO_SMALLIOV) { 398 if ((u_int)msg.msg_iovlen >= UIO_MAXIOV) 399 return (EMSGSIZE); 400 MALLOC(iov, struct iovec *, 401 sizeof(struct iovec) * (u_int)msg.msg_iovlen, M_IOV, 402 M_WAITOK); 403 } else 404 iov = aiov; 405 if (error = copyin((caddr_t)msg.msg_iov, (caddr_t)iov, 406 (unsigned)(msg.msg_iovlen * sizeof (struct iovec)))) 407 goto done; 408 msg.msg_flags = MSG_COMPAT; 409 msg.msg_iov = iov; 410 error = sendit(p, uap->s, &msg, uap->flags, retval); 411 done: 412 if (iov != aiov) 413 FREE(iov, M_IOV); 414 return (error); 415 } 416 #endif 417 418 sendmsg(p, uap, retval) 419 struct proc *p; 420 register struct args { 421 int s; 422 caddr_t msg; 423 int flags; 424 } *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_43 447 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_offset = 0; /* XXX */ 479 auio.uio_resid = 0; 480 iov = mp->msg_iov; 481 for (i = 0; i < mp->msg_iovlen; i++, iov++) { 482 if (iov->iov_len < 0) 483 return (EINVAL); 484 if ((auio.uio_resid += iov->iov_len) < 0) 485 return (EINVAL); 486 } 487 if (mp->msg_name) { 488 if (error = sockargs(&to, mp->msg_name, mp->msg_namelen, 489 MT_SONAME)) 490 return (error); 491 } else 492 to = 0; 493 if (mp->msg_control) { 494 if (mp->msg_controllen < sizeof(struct cmsghdr) 495 #ifdef COMPAT_43 496 && mp->msg_flags != MSG_COMPAT 497 #endif 498 ) { 499 error = EINVAL; 500 goto bad; 501 } 502 if (error = sockargs(&control, mp->msg_control, 503 mp->msg_controllen, MT_CONTROL)) 504 goto bad; 505 #ifdef COMPAT_43 506 if (mp->msg_flags == MSG_COMPAT) { 507 register struct cmsghdr *cm; 508 509 M_PREPEND(control, sizeof(*cm), M_WAIT); 510 if (control == 0) { 511 error = ENOBUFS; 512 goto bad; 513 } else { 514 cm = mtod(control, struct cmsghdr *); 515 cm->cmsg_len = control->m_len; 516 cm->cmsg_level = SOL_SOCKET; 517 cm->cmsg_type = SCM_RIGHTS; 518 } 519 } 520 #endif 521 } else 522 control = 0; 523 #ifdef KTRACE 524 if (KTRPOINT(p, KTR_GENIO)) { 525 int iovlen = auio.uio_iovcnt * sizeof (struct iovec); 526 527 MALLOC(ktriov, struct iovec *, iovlen, M_TEMP, M_WAITOK); 528 bcopy((caddr_t)auio.uio_iov, (caddr_t)ktriov, iovlen); 529 } 530 #endif 531 len = auio.uio_resid; 532 if (error = sosend((struct socket *)fp->f_data, to, &auio, 533 (struct mbuf *)0, control, flags)) { 534 if (auio.uio_resid != len && (error == ERESTART || 535 error == EINTR || error == EWOULDBLOCK)) 536 error = 0; 537 if (error == EPIPE) 538 psignal(p, SIGPIPE); 539 } 540 if (error == 0) 541 *retsize = len - auio.uio_resid; 542 #ifdef KTRACE 543 if (ktriov != NULL) { 544 if (error == 0) 545 ktrgenio(p->p_tracep, s, UIO_WRITE, 546 ktriov, *retsize, error); 547 FREE(ktriov, M_TEMP); 548 } 549 #endif 550 bad: 551 if (to) 552 m_freem(to); 553 return (error); 554 } 555 556 #ifdef COMPAT_43 557 orecvfrom(p, uap, retval) 558 struct proc *p; 559 struct args { 560 int s; 561 caddr_t buf; 562 int len; 563 int flags; 564 caddr_t from; 565 int *fromlenaddr; 566 } *uap; 567 int *retval; 568 { 569 570 uap->flags |= MSG_COMPAT; 571 return (recvfrom(p, uap, retval)); 572 } 573 #endif 574 575 recvfrom(p, uap, retval) 576 struct proc *p; 577 register struct args { 578 int s; 579 caddr_t buf; 580 int len; 581 int flags; 582 caddr_t from; 583 int *fromlenaddr; 584 } *uap; 585 int *retval; 586 { 587 struct msghdr msg; 588 struct iovec aiov; 589 int error; 590 591 if (uap->fromlenaddr) { 592 if (error = copyin((caddr_t)uap->fromlenaddr, 593 (caddr_t)&msg.msg_namelen, sizeof (msg.msg_namelen))) 594 return (error); 595 } else 596 msg.msg_namelen = 0; 597 msg.msg_name = uap->from; 598 msg.msg_iov = &aiov; 599 msg.msg_iovlen = 1; 600 aiov.iov_base = uap->buf; 601 aiov.iov_len = uap->len; 602 msg.msg_control = 0; 603 msg.msg_flags = uap->flags; 604 return (recvit(p, uap->s, &msg, (caddr_t)uap->fromlenaddr, retval)); 605 } 606 607 #ifdef COMPAT_43 608 orecv(p, uap, retval) 609 struct proc *p; 610 register struct args { 611 int s; 612 caddr_t buf; 613 int len; 614 int flags; 615 } *uap; 616 int *retval; 617 { 618 struct msghdr msg; 619 struct iovec aiov; 620 621 msg.msg_name = 0; 622 msg.msg_namelen = 0; 623 msg.msg_iov = &aiov; 624 msg.msg_iovlen = 1; 625 aiov.iov_base = uap->buf; 626 aiov.iov_len = uap->len; 627 msg.msg_control = 0; 628 msg.msg_flags = uap->flags; 629 return (recvit(p, uap->s, &msg, (caddr_t)0, retval)); 630 } 631 632 /* 633 * Old recvmsg. This code takes advantage of the fact that the old msghdr 634 * overlays the new one, missing only the flags, and with the (old) access 635 * rights where the control fields are now. 636 */ 637 orecvmsg(p, uap, retval) 638 struct proc *p; 639 register struct args { 640 int s; 641 struct omsghdr *msg; 642 int flags; 643 } *uap; 644 int *retval; 645 { 646 struct msghdr msg; 647 struct iovec aiov[UIO_SMALLIOV], *iov; 648 int error; 649 650 if (error = copyin((caddr_t)uap->msg, (caddr_t)&msg, 651 sizeof (struct omsghdr))) 652 return (error); 653 if ((u_int)msg.msg_iovlen >= UIO_SMALLIOV) { 654 if ((u_int)msg.msg_iovlen >= UIO_MAXIOV) 655 return (EMSGSIZE); 656 MALLOC(iov, struct iovec *, 657 sizeof(struct iovec) * (u_int)msg.msg_iovlen, M_IOV, 658 M_WAITOK); 659 } else 660 iov = aiov; 661 msg.msg_flags = uap->flags | MSG_COMPAT; 662 if (error = copyin((caddr_t)msg.msg_iov, (caddr_t)iov, 663 (unsigned)(msg.msg_iovlen * sizeof (struct iovec)))) 664 goto done; 665 msg.msg_iov = iov; 666 error = recvit(p, uap->s, &msg, (caddr_t)&uap->msg->msg_namelen, retval); 667 668 if (msg.msg_controllen && error == 0) 669 error = copyout((caddr_t)&msg.msg_controllen, 670 (caddr_t)&uap->msg->msg_accrightslen, sizeof (int)); 671 done: 672 if (iov != aiov) 673 FREE(iov, M_IOV); 674 return (error); 675 } 676 #endif 677 678 recvmsg(p, uap, retval) 679 struct proc *p; 680 register struct args { 681 int s; 682 struct msghdr *msg; 683 int flags; 684 } *uap; 685 int *retval; 686 { 687 struct msghdr msg; 688 struct iovec aiov[UIO_SMALLIOV], *uiov, *iov; 689 register int error; 690 691 if (error = copyin((caddr_t)uap->msg, (caddr_t)&msg, sizeof (msg))) 692 return (error); 693 if ((u_int)msg.msg_iovlen >= UIO_SMALLIOV) { 694 if ((u_int)msg.msg_iovlen >= UIO_MAXIOV) 695 return (EMSGSIZE); 696 MALLOC(iov, struct iovec *, 697 sizeof(struct iovec) * (u_int)msg.msg_iovlen, M_IOV, 698 M_WAITOK); 699 } else 700 iov = aiov; 701 #ifdef COMPAT_43 702 msg.msg_flags = uap->flags &~ MSG_COMPAT; 703 #else 704 msg.msg_flags = uap->flags; 705 #endif 706 uiov = msg.msg_iov; 707 msg.msg_iov = iov; 708 if (error = copyin((caddr_t)uiov, (caddr_t)iov, 709 (unsigned)(msg.msg_iovlen * sizeof (struct iovec)))) 710 goto done; 711 if ((error = recvit(p, uap->s, &msg, (caddr_t)0, retval)) == 0) { 712 msg.msg_iov = uiov; 713 error = copyout((caddr_t)&msg, (caddr_t)uap->msg, sizeof(msg)); 714 } 715 done: 716 if (iov != aiov) 717 FREE(iov, M_IOV); 718 return (error); 719 } 720 721 recvit(p, s, mp, namelenp, retsize) 722 register struct proc *p; 723 int s; 724 register struct msghdr *mp; 725 caddr_t namelenp; 726 int *retsize; 727 { 728 struct file *fp; 729 struct uio auio; 730 register struct iovec *iov; 731 register int i; 732 int len, error; 733 struct mbuf *from = 0, *control = 0; 734 #ifdef KTRACE 735 struct iovec *ktriov = NULL; 736 #endif 737 738 if (error = getsock(p->p_fd, s, &fp)) 739 return (error); 740 auio.uio_iov = mp->msg_iov; 741 auio.uio_iovcnt = mp->msg_iovlen; 742 auio.uio_segflg = UIO_USERSPACE; 743 auio.uio_rw = UIO_READ; 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, &control, &mp->msg_flags)) { 764 if (auio.uio_resid != len && (error == ERESTART || 765 error == EINTR || error == EWOULDBLOCK)) 766 error = 0; 767 } 768 #ifdef KTRACE 769 if (ktriov != NULL) { 770 if (error == 0) 771 ktrgenio(p->p_tracep, s, UIO_READ, 772 ktriov, len - auio.uio_resid, error); 773 FREE(ktriov, M_TEMP); 774 } 775 #endif 776 if (error) 777 goto out; 778 *retsize = len - auio.uio_resid; 779 if (mp->msg_name) { 780 len = mp->msg_namelen; 781 if (len <= 0 || from == 0) 782 len = 0; 783 else { 784 #ifdef COMPAT_43 785 if (mp->msg_flags & MSG_COMPAT) 786 mtod(from, struct osockaddr *)->sa_family = 787 mtod(from, struct sockaddr *)->sa_family; 788 #endif 789 if (len > from->m_len) 790 len = from->m_len; 791 /* else if len < from->m_len ??? */ 792 if (error = copyout(mtod(from, caddr_t), 793 (caddr_t)mp->msg_name, (unsigned)len)) 794 goto out; 795 } 796 mp->msg_namelen = len; 797 if (namelenp && 798 (error = copyout((caddr_t)&len, namelenp, sizeof (int)))) { 799 #ifdef COMPAT_43 800 if (mp->msg_flags & MSG_COMPAT) 801 error = 0; /* old recvfrom didn't check */ 802 else 803 #endif 804 goto out; 805 } 806 } 807 if (mp->msg_control) { 808 #ifdef COMPAT_43 809 /* 810 * We assume that old recvmsg calls won't receive access 811 * rights and other control info, esp. as control info 812 * is always optional and those options didn't exist in 4.3. 813 * If we receive rights, trim the cmsghdr; anything else 814 * is tossed. 815 */ 816 if (control && mp->msg_flags & MSG_COMPAT) { 817 if (mtod(control, struct cmsghdr *)->cmsg_level != 818 SOL_SOCKET || 819 mtod(control, struct cmsghdr *)->cmsg_type != 820 SCM_RIGHTS) { 821 mp->msg_controllen = 0; 822 goto out; 823 } 824 control->m_len -= sizeof (struct cmsghdr); 825 control->m_data += sizeof (struct cmsghdr); 826 } 827 #endif 828 len = mp->msg_controllen; 829 if (len <= 0 || control == 0) 830 len = 0; 831 else { 832 if (len >= control->m_len) 833 len = control->m_len; 834 else 835 mp->msg_flags |= MSG_CTRUNC; 836 error = copyout((caddr_t)mtod(control, caddr_t), 837 (caddr_t)mp->msg_control, (unsigned)len); 838 } 839 mp->msg_controllen = len; 840 } 841 out: 842 if (from) 843 m_freem(from); 844 if (control) 845 m_freem(control); 846 return (error); 847 } 848 849 /* ARGSUSED */ 850 shutdown(p, uap, retval) 851 struct proc *p; 852 register struct args { 853 int s; 854 int how; 855 } *uap; 856 int *retval; 857 { 858 struct file *fp; 859 int error; 860 861 if (error = getsock(p->p_fd, uap->s, &fp)) 862 return (error); 863 return (soshutdown((struct socket *)fp->f_data, uap->how)); 864 } 865 866 /* ARGSUSED */ 867 setsockopt(p, uap, retval) 868 struct proc *p; 869 register struct args { 870 int s; 871 int level; 872 int name; 873 caddr_t val; 874 int valsize; 875 } *uap; 876 int *retval; 877 { 878 struct file *fp; 879 struct mbuf *m = NULL; 880 int error; 881 882 if (error = getsock(p->p_fd, uap->s, &fp)) 883 return (error); 884 if (uap->valsize > MLEN) 885 return (EINVAL); 886 if (uap->val) { 887 m = m_get(M_WAIT, MT_SOOPTS); 888 if (m == NULL) 889 return (ENOBUFS); 890 if (error = copyin(uap->val, mtod(m, caddr_t), 891 (u_int)uap->valsize)) { 892 (void) m_free(m); 893 return (error); 894 } 895 m->m_len = uap->valsize; 896 } 897 return (sosetopt((struct socket *)fp->f_data, uap->level, 898 uap->name, m)); 899 } 900 901 /* ARGSUSED */ 902 getsockopt(p, uap, retval) 903 struct proc *p; 904 register struct args { 905 int s; 906 int level; 907 int name; 908 caddr_t val; 909 int *avalsize; 910 } *uap; 911 int *retval; 912 { 913 struct file *fp; 914 struct mbuf *m = NULL; 915 int valsize, error; 916 917 if (error = getsock(p->p_fd, uap->s, &fp)) 918 return (error); 919 if (uap->val) { 920 if (error = copyin((caddr_t)uap->avalsize, (caddr_t)&valsize, 921 sizeof (valsize))) 922 return (error); 923 } else 924 valsize = 0; 925 if ((error = sogetopt((struct socket *)fp->f_data, uap->level, 926 uap->name, &m)) == 0 && uap->val && valsize && m != NULL) { 927 if (valsize > m->m_len) 928 valsize = m->m_len; 929 error = copyout(mtod(m, caddr_t), uap->val, (u_int)valsize); 930 if (error == 0) 931 error = copyout((caddr_t)&valsize, 932 (caddr_t)uap->avalsize, sizeof (valsize)); 933 } 934 if (m != NULL) 935 (void) m_free(m); 936 return (error); 937 } 938 939 /* ARGSUSED */ 940 pipe(p, uap, retval) 941 struct proc *p; 942 struct args *uap; 943 int retval[]; 944 { 945 register struct filedesc *fdp = p->p_fd; 946 struct file *rf, *wf; 947 struct socket *rso, *wso; 948 int fd, error; 949 950 if (error = socreate(AF_UNIX, &rso, SOCK_STREAM, 0)) 951 return (error); 952 if (error = socreate(AF_UNIX, &wso, SOCK_STREAM, 0)) 953 goto free1; 954 if (error = falloc(p, &rf, &fd)) 955 goto free2; 956 retval[0] = fd; 957 rf->f_flag = FREAD; 958 rf->f_type = DTYPE_SOCKET; 959 rf->f_ops = &socketops; 960 rf->f_data = (caddr_t)rso; 961 if (error = falloc(p, &wf, &fd)) 962 goto free3; 963 wf->f_flag = FWRITE; 964 wf->f_type = DTYPE_SOCKET; 965 wf->f_ops = &socketops; 966 wf->f_data = (caddr_t)wso; 967 retval[1] = fd; 968 if (error = unp_connect2(wso, rso)) 969 goto free4; 970 return (0); 971 free4: 972 wf->f_count = 0; 973 OFILE(fdp, retval[1]) = 0; 974 free3: 975 rf->f_count = 0; 976 OFILE(fdp, retval[0]) = 0; 977 free2: 978 (void)soclose(wso); 979 free1: 980 (void)soclose(rso); 981 return (error); 982 } 983 984 /* 985 * Get socket name. 986 */ 987 #ifdef COMPAT_43 988 getsockname(p, uap, retval) 989 struct proc *p; 990 struct args { 991 int fdes; 992 caddr_t asa; 993 int *alen; 994 int compat_43; 995 } *uap; 996 int *retval; 997 { 998 999 uap->compat_43 = 0; 1000 return (getsockname1(p, uap, retval)); 1001 } 1002 1003 ogetsockname(p, uap, retval) 1004 struct proc *p; 1005 struct args { 1006 int fdes; 1007 caddr_t asa; 1008 int *alen; 1009 int compat_43; 1010 } *uap; 1011 int *retval; 1012 { 1013 1014 uap->compat_43 = 1; 1015 return (getsockname1(p, uap, retval)); 1016 } 1017 #else /* COMPAT_43 */ 1018 1019 #define getsockname1 getsockname 1020 #endif 1021 1022 /* ARGSUSED */ 1023 getsockname1(p, uap, retval) 1024 struct proc *p; 1025 register struct args { 1026 int fdes; 1027 caddr_t asa; 1028 int *alen; 1029 #ifdef COMPAT_43 1030 int compat_43; 1031 #endif 1032 } *uap; 1033 int *retval; 1034 { 1035 struct file *fp; 1036 register struct socket *so; 1037 struct mbuf *m; 1038 int len, error; 1039 1040 if (error = getsock(p->p_fd, uap->fdes, &fp)) 1041 return (error); 1042 if (error = copyin((caddr_t)uap->alen, (caddr_t)&len, sizeof (len))) 1043 return (error); 1044 so = (struct socket *)fp->f_data; 1045 m = m_getclr(M_WAIT, MT_SONAME); 1046 if (m == NULL) 1047 return (ENOBUFS); 1048 if (error = (*so->so_proto->pr_usrreq)(so, PRU_SOCKADDR, 0, m, 0)) 1049 goto bad; 1050 if (len > m->m_len) 1051 len = m->m_len; 1052 #ifdef COMPAT_43 1053 if (uap->compat_43) 1054 mtod(m, struct osockaddr *)->sa_family = 1055 mtod(m, struct sockaddr *)->sa_family; 1056 #endif 1057 error = copyout(mtod(m, caddr_t), (caddr_t)uap->asa, (u_int)len); 1058 if (error == 0) 1059 error = copyout((caddr_t)&len, (caddr_t)uap->alen, 1060 sizeof (len)); 1061 bad: 1062 m_freem(m); 1063 return (error); 1064 } 1065 1066 /* 1067 * Get name of peer for connected socket. 1068 */ 1069 #ifdef COMPAT_43 1070 getpeername(p, uap, retval) 1071 struct proc *p; 1072 struct args { 1073 int fdes; 1074 caddr_t asa; 1075 int *alen; 1076 int compat_43; 1077 } *uap; 1078 int *retval; 1079 { 1080 1081 uap->compat_43 = 0; 1082 return (getpeername1(p, uap, retval)); 1083 } 1084 1085 ogetpeername(p, uap, retval) 1086 struct proc *p; 1087 struct args { 1088 int fdes; 1089 caddr_t asa; 1090 int *alen; 1091 int compat_43; 1092 } *uap; 1093 int *retval; 1094 { 1095 1096 uap->compat_43 = 1; 1097 return (getpeername1(p, uap, retval)); 1098 } 1099 #else /* COMPAT_43 */ 1100 1101 #define getpeername1 getpeername 1102 #endif 1103 1104 /* ARGSUSED */ 1105 getpeername1(p, uap, retval) 1106 struct proc *p; 1107 register struct args { 1108 int fdes; 1109 caddr_t asa; 1110 int *alen; 1111 #ifdef COMPAT_43 1112 int compat_43; 1113 #endif 1114 } *uap; 1115 int *retval; 1116 { 1117 struct file *fp; 1118 register struct socket *so; 1119 struct mbuf *m; 1120 int len, error; 1121 1122 if (error = getsock(p->p_fd, uap->fdes, &fp)) 1123 return (error); 1124 so = (struct socket *)fp->f_data; 1125 if ((so->so_state & (SS_ISCONNECTED|SS_ISCONFIRMING)) == 0) 1126 return (ENOTCONN); 1127 m = m_getclr(M_WAIT, MT_SONAME); 1128 if (m == NULL) 1129 return (ENOBUFS); 1130 if (error = copyin((caddr_t)uap->alen, (caddr_t)&len, sizeof (len))) 1131 return (error); 1132 if (error = (*so->so_proto->pr_usrreq)(so, PRU_PEERADDR, 0, m, 0)) 1133 goto bad; 1134 if (len > m->m_len) 1135 len = m->m_len; 1136 #ifdef COMPAT_43 1137 if (uap->compat_43) 1138 mtod(m, struct osockaddr *)->sa_family = 1139 mtod(m, struct sockaddr *)->sa_family; 1140 #endif 1141 if (error = copyout(mtod(m, caddr_t), (caddr_t)uap->asa, (u_int)len)) 1142 goto bad; 1143 error = copyout((caddr_t)&len, (caddr_t)uap->alen, sizeof (len)); 1144 bad: 1145 m_freem(m); 1146 return (error); 1147 } 1148 1149 sockargs(mp, buf, buflen, type) 1150 struct mbuf **mp; 1151 caddr_t buf; 1152 int buflen, type; 1153 { 1154 register struct mbuf *m; 1155 int error; 1156 1157 if ((u_int)buflen > MLEN) { 1158 #ifdef COMPAT_43 1159 if (type == MT_SONAME && (u_int)buflen <= 112) 1160 buflen = MLEN; /* unix domain compat. hack */ 1161 else 1162 #endif 1163 return (EINVAL); 1164 } 1165 m = m_get(M_WAIT, type); 1166 if (m == NULL) 1167 return (ENOBUFS); 1168 m->m_len = buflen; 1169 error = copyin(buf, mtod(m, caddr_t), (u_int)buflen); 1170 if (error) 1171 (void) m_free(m); 1172 else 1173 *mp = m; 1174 if (type == MT_SONAME) { 1175 register struct sockaddr *sa = mtod(m, struct sockaddr *); 1176 1177 #if defined(COMPAT_43) && BYTE_ORDER != BIG_ENDIAN 1178 if (sa->sa_family == 0 && sa->sa_len < AF_MAX) 1179 sa->sa_family = sa->sa_len; 1180 #endif 1181 sa->sa_len = buflen; 1182 } 1183 return (error); 1184 } 1185 1186 getsock(fdp, fdes, fpp) 1187 struct filedesc *fdp; 1188 int fdes; 1189 struct file **fpp; 1190 { 1191 register struct file *fp; 1192 1193 if ((unsigned)fdes >= fdp->fd_maxfiles || 1194 (fp = OFILE(fdp, fdes)) == NULL) 1195 return (EBADF); 1196 if (fp->f_type != DTYPE_SOCKET) 1197 return (ENOTSOCK); 1198 *fpp = fp; 1199 return (0); 1200 } 1201