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 8.3 (Berkeley) 01/04/94 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; 338 339 msg.msg_name = uap->to; 340 msg.msg_namelen = uap->tolen; 341 msg.msg_iov = &aiov; 342 msg.msg_iovlen = 1; 343 msg.msg_control = 0; 344 #ifdef COMPAT_OLDSOCK 345 msg.msg_flags = 0; 346 #endif 347 aiov.iov_base = uap->buf; 348 aiov.iov_len = uap->len; 349 return (sendit(p, uap->s, &msg, uap->flags, retval)); 350 } 351 352 #ifdef COMPAT_OLDSOCK 353 struct osend_args { 354 int s; 355 caddr_t buf; 356 int len; 357 int flags; 358 }; 359 osend(p, uap, retval) 360 struct proc *p; 361 register struct osend_args *uap; 362 int *retval; 363 { 364 struct msghdr msg; 365 struct iovec aiov; 366 367 msg.msg_name = 0; 368 msg.msg_namelen = 0; 369 msg.msg_iov = &aiov; 370 msg.msg_iovlen = 1; 371 aiov.iov_base = uap->buf; 372 aiov.iov_len = uap->len; 373 msg.msg_control = 0; 374 msg.msg_flags = 0; 375 return (sendit(p, uap->s, &msg, uap->flags, retval)); 376 } 377 378 #define MSG_COMPAT 0x8000 379 struct osendmsg_args { 380 int s; 381 caddr_t msg; 382 int flags; 383 }; 384 osendmsg(p, uap, retval) 385 struct proc *p; 386 register struct osendmsg_args *uap; 387 int *retval; 388 { 389 struct msghdr msg; 390 struct iovec aiov[UIO_SMALLIOV], *iov; 391 int error; 392 393 if (error = copyin(uap->msg, (caddr_t)&msg, sizeof (struct omsghdr))) 394 return (error); 395 if ((u_int)msg.msg_iovlen >= UIO_SMALLIOV) { 396 if ((u_int)msg.msg_iovlen >= UIO_MAXIOV) 397 return (EMSGSIZE); 398 MALLOC(iov, struct iovec *, 399 sizeof(struct iovec) * (u_int)msg.msg_iovlen, M_IOV, 400 M_WAITOK); 401 } else 402 iov = aiov; 403 if (error = copyin((caddr_t)msg.msg_iov, (caddr_t)iov, 404 (unsigned)(msg.msg_iovlen * sizeof (struct iovec)))) 405 goto done; 406 msg.msg_flags = MSG_COMPAT; 407 msg.msg_iov = iov; 408 error = sendit(p, uap->s, &msg, uap->flags, retval); 409 done: 410 if (iov != aiov) 411 FREE(iov, M_IOV); 412 return (error); 413 } 414 #endif 415 416 struct sendmsg_args { 417 int s; 418 caddr_t msg; 419 int flags; 420 }; 421 sendmsg(p, uap, retval) 422 struct proc *p; 423 register struct sendmsg_args *uap; 424 int *retval; 425 { 426 struct msghdr msg; 427 struct iovec aiov[UIO_SMALLIOV], *iov; 428 int error; 429 430 if (error = copyin(uap->msg, (caddr_t)&msg, sizeof (msg))) 431 return (error); 432 if ((u_int)msg.msg_iovlen >= UIO_SMALLIOV) { 433 if ((u_int)msg.msg_iovlen >= UIO_MAXIOV) 434 return (EMSGSIZE); 435 MALLOC(iov, struct iovec *, 436 sizeof(struct iovec) * (u_int)msg.msg_iovlen, M_IOV, 437 M_WAITOK); 438 } else 439 iov = aiov; 440 if (msg.msg_iovlen && 441 (error = copyin((caddr_t)msg.msg_iov, (caddr_t)iov, 442 (unsigned)(msg.msg_iovlen * sizeof (struct iovec))))) 443 goto done; 444 msg.msg_iov = iov; 445 #ifdef COMPAT_OLDSOCK 446 msg.msg_flags = 0; 447 #endif 448 error = sendit(p, uap->s, &msg, uap->flags, retval); 449 done: 450 if (iov != aiov) 451 FREE(iov, M_IOV); 452 return (error); 453 } 454 455 sendit(p, s, mp, flags, retsize) 456 register struct proc *p; 457 int s; 458 register struct msghdr *mp; 459 int flags, *retsize; 460 { 461 struct file *fp; 462 struct uio auio; 463 register struct iovec *iov; 464 register int i; 465 struct mbuf *to, *control; 466 int len, error; 467 #ifdef KTRACE 468 struct iovec *ktriov = NULL; 469 #endif 470 471 if (error = getsock(p->p_fd, s, &fp)) 472 return (error); 473 auio.uio_iov = mp->msg_iov; 474 auio.uio_iovcnt = mp->msg_iovlen; 475 auio.uio_segflg = UIO_USERSPACE; 476 auio.uio_rw = UIO_WRITE; 477 auio.uio_procp = p; 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_OLDSOCK 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_OLDSOCK 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 struct recvfrom_args { 557 int s; 558 caddr_t buf; 559 int len; 560 int flags; 561 caddr_t from; 562 int *fromlenaddr; 563 }; 564 565 #ifdef COMPAT_OLDSOCK 566 orecvfrom(p, uap, retval) 567 struct proc *p; 568 struct recvfrom_args *uap; 569 int *retval; 570 { 571 572 uap->flags |= MSG_COMPAT; 573 return (recvfrom(p, uap, retval)); 574 } 575 #endif 576 577 recvfrom(p, uap, retval) 578 struct proc *p; 579 register struct recvfrom_args *uap; 580 int *retval; 581 { 582 struct msghdr msg; 583 struct iovec aiov; 584 int error; 585 586 if (uap->fromlenaddr) { 587 if (error = copyin((caddr_t)uap->fromlenaddr, 588 (caddr_t)&msg.msg_namelen, sizeof (msg.msg_namelen))) 589 return (error); 590 } else 591 msg.msg_namelen = 0; 592 msg.msg_name = uap->from; 593 msg.msg_iov = &aiov; 594 msg.msg_iovlen = 1; 595 aiov.iov_base = uap->buf; 596 aiov.iov_len = uap->len; 597 msg.msg_control = 0; 598 msg.msg_flags = uap->flags; 599 return (recvit(p, uap->s, &msg, (caddr_t)uap->fromlenaddr, retval)); 600 } 601 602 #ifdef COMPAT_OLDSOCK 603 struct orecv_args { 604 int s; 605 caddr_t buf; 606 int len; 607 int flags; 608 }; 609 orecv(p, uap, retval) 610 struct proc *p; 611 register struct orecv_args *uap; 612 int *retval; 613 { 614 struct msghdr msg; 615 struct iovec aiov; 616 617 msg.msg_name = 0; 618 msg.msg_namelen = 0; 619 msg.msg_iov = &aiov; 620 msg.msg_iovlen = 1; 621 aiov.iov_base = uap->buf; 622 aiov.iov_len = uap->len; 623 msg.msg_control = 0; 624 msg.msg_flags = uap->flags; 625 return (recvit(p, uap->s, &msg, (caddr_t)0, retval)); 626 } 627 628 /* 629 * Old recvmsg. This code takes advantage of the fact that the old msghdr 630 * overlays the new one, missing only the flags, and with the (old) access 631 * rights where the control fields are now. 632 */ 633 struct orecvmsg_args { 634 int s; 635 struct omsghdr *msg; 636 int flags; 637 }; 638 orecvmsg(p, uap, retval) 639 struct proc *p; 640 register struct orecvmsg_args *uap; 641 int *retval; 642 { 643 struct msghdr msg; 644 struct iovec aiov[UIO_SMALLIOV], *iov; 645 int error; 646 647 if (error = copyin((caddr_t)uap->msg, (caddr_t)&msg, 648 sizeof (struct omsghdr))) 649 return (error); 650 if ((u_int)msg.msg_iovlen >= UIO_SMALLIOV) { 651 if ((u_int)msg.msg_iovlen >= UIO_MAXIOV) 652 return (EMSGSIZE); 653 MALLOC(iov, struct iovec *, 654 sizeof(struct iovec) * (u_int)msg.msg_iovlen, M_IOV, 655 M_WAITOK); 656 } else 657 iov = aiov; 658 msg.msg_flags = uap->flags | MSG_COMPAT; 659 if (error = copyin((caddr_t)msg.msg_iov, (caddr_t)iov, 660 (unsigned)(msg.msg_iovlen * sizeof (struct iovec)))) 661 goto done; 662 msg.msg_iov = iov; 663 error = recvit(p, uap->s, &msg, (caddr_t)&uap->msg->msg_namelen, retval); 664 665 if (msg.msg_controllen && error == 0) 666 error = copyout((caddr_t)&msg.msg_controllen, 667 (caddr_t)&uap->msg->msg_accrightslen, sizeof (int)); 668 done: 669 if (iov != aiov) 670 FREE(iov, M_IOV); 671 return (error); 672 } 673 #endif 674 675 struct recvmsg_args { 676 int s; 677 struct msghdr *msg; 678 int flags; 679 }; 680 recvmsg(p, uap, retval) 681 struct proc *p; 682 register struct recvmsg_args *uap; 683 int *retval; 684 { 685 struct msghdr msg; 686 struct iovec aiov[UIO_SMALLIOV], *uiov, *iov; 687 register int error; 688 689 if (error = copyin((caddr_t)uap->msg, (caddr_t)&msg, sizeof (msg))) 690 return (error); 691 if ((u_int)msg.msg_iovlen >= UIO_SMALLIOV) { 692 if ((u_int)msg.msg_iovlen >= UIO_MAXIOV) 693 return (EMSGSIZE); 694 MALLOC(iov, struct iovec *, 695 sizeof(struct iovec) * (u_int)msg.msg_iovlen, M_IOV, 696 M_WAITOK); 697 } else 698 iov = aiov; 699 #ifdef COMPAT_OLDSOCK 700 msg.msg_flags = uap->flags &~ MSG_COMPAT; 701 #else 702 msg.msg_flags = uap->flags; 703 #endif 704 uiov = msg.msg_iov; 705 msg.msg_iov = iov; 706 if (error = copyin((caddr_t)uiov, (caddr_t)iov, 707 (unsigned)(msg.msg_iovlen * sizeof (struct iovec)))) 708 goto done; 709 if ((error = recvit(p, uap->s, &msg, (caddr_t)0, retval)) == 0) { 710 msg.msg_iov = uiov; 711 error = copyout((caddr_t)&msg, (caddr_t)uap->msg, sizeof(msg)); 712 } 713 done: 714 if (iov != aiov) 715 FREE(iov, M_IOV); 716 return (error); 717 } 718 719 recvit(p, s, mp, namelenp, retsize) 720 register struct proc *p; 721 int s; 722 register struct msghdr *mp; 723 caddr_t namelenp; 724 int *retsize; 725 { 726 struct file *fp; 727 struct uio auio; 728 register struct iovec *iov; 729 register int i; 730 int len, error; 731 struct mbuf *from = 0, *control = 0; 732 #ifdef KTRACE 733 struct iovec *ktriov = NULL; 734 #endif 735 736 if (error = getsock(p->p_fd, s, &fp)) 737 return (error); 738 auio.uio_iov = mp->msg_iov; 739 auio.uio_iovcnt = mp->msg_iovlen; 740 auio.uio_segflg = UIO_USERSPACE; 741 auio.uio_rw = UIO_READ; 742 auio.uio_procp = p; 743 auio.uio_offset = 0; /* XXX */ 744 auio.uio_resid = 0; 745 iov = mp->msg_iov; 746 for (i = 0; i < mp->msg_iovlen; i++, iov++) { 747 if (iov->iov_len < 0) 748 return (EINVAL); 749 if ((auio.uio_resid += iov->iov_len) < 0) 750 return (EINVAL); 751 } 752 #ifdef KTRACE 753 if (KTRPOINT(p, KTR_GENIO)) { 754 int iovlen = auio.uio_iovcnt * sizeof (struct iovec); 755 756 MALLOC(ktriov, struct iovec *, iovlen, M_TEMP, M_WAITOK); 757 bcopy((caddr_t)auio.uio_iov, (caddr_t)ktriov, iovlen); 758 } 759 #endif 760 len = auio.uio_resid; 761 if (error = soreceive((struct socket *)fp->f_data, &from, &auio, 762 (struct mbuf **)0, mp->msg_control ? &control : (struct mbuf **)0, 763 &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_OLDSOCK 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_OLDSOCK 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_OLDSOCK 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 struct shutdown_args { 850 int s; 851 int how; 852 }; 853 /* ARGSUSED */ 854 shutdown(p, uap, retval) 855 struct proc *p; 856 register struct shutdown_args *uap; 857 int *retval; 858 { 859 struct file *fp; 860 int error; 861 862 if (error = getsock(p->p_fd, uap->s, &fp)) 863 return (error); 864 return (soshutdown((struct socket *)fp->f_data, uap->how)); 865 } 866 867 struct setsockopt_args { 868 int s; 869 int level; 870 int name; 871 caddr_t val; 872 int valsize; 873 }; 874 /* ARGSUSED */ 875 setsockopt(p, uap, retval) 876 struct proc *p; 877 register struct setsockopt_args *uap; 878 int *retval; 879 { 880 struct file *fp; 881 struct mbuf *m = NULL; 882 int error; 883 884 if (error = getsock(p->p_fd, uap->s, &fp)) 885 return (error); 886 if (uap->valsize > MLEN) 887 return (EINVAL); 888 if (uap->val) { 889 m = m_get(M_WAIT, MT_SOOPTS); 890 if (m == NULL) 891 return (ENOBUFS); 892 if (error = copyin(uap->val, mtod(m, caddr_t), 893 (u_int)uap->valsize)) { 894 (void) m_free(m); 895 return (error); 896 } 897 m->m_len = uap->valsize; 898 } 899 return (sosetopt((struct socket *)fp->f_data, uap->level, 900 uap->name, m)); 901 } 902 903 struct getsockopt_args { 904 int s; 905 int level; 906 int name; 907 caddr_t val; 908 int *avalsize; 909 }; 910 /* ARGSUSED */ 911 getsockopt(p, uap, retval) 912 struct proc *p; 913 register struct getsockopt_args *uap; 914 int *retval; 915 { 916 struct file *fp; 917 struct mbuf *m = NULL; 918 int valsize, error; 919 920 if (error = getsock(p->p_fd, uap->s, &fp)) 921 return (error); 922 if (uap->val) { 923 if (error = copyin((caddr_t)uap->avalsize, (caddr_t)&valsize, 924 sizeof (valsize))) 925 return (error); 926 } else 927 valsize = 0; 928 if ((error = sogetopt((struct socket *)fp->f_data, uap->level, 929 uap->name, &m)) == 0 && uap->val && valsize && m != NULL) { 930 if (valsize > m->m_len) 931 valsize = m->m_len; 932 error = copyout(mtod(m, caddr_t), uap->val, (u_int)valsize); 933 if (error == 0) 934 error = copyout((caddr_t)&valsize, 935 (caddr_t)uap->avalsize, sizeof (valsize)); 936 } 937 if (m != NULL) 938 (void) m_free(m); 939 return (error); 940 } 941 942 struct pipe_args { 943 int dummy; 944 }; 945 /* ARGSUSED */ 946 pipe(p, uap, retval) 947 struct proc *p; 948 struct pipe_args *uap; 949 int retval[]; 950 { 951 register struct filedesc *fdp = p->p_fd; 952 struct file *rf, *wf; 953 struct socket *rso, *wso; 954 int fd, error; 955 956 if (error = socreate(AF_UNIX, &rso, SOCK_STREAM, 0)) 957 return (error); 958 if (error = socreate(AF_UNIX, &wso, SOCK_STREAM, 0)) 959 goto free1; 960 if (error = falloc(p, &rf, &fd)) 961 goto free2; 962 retval[0] = fd; 963 rf->f_flag = FREAD; 964 rf->f_type = DTYPE_SOCKET; 965 rf->f_ops = &socketops; 966 rf->f_data = (caddr_t)rso; 967 if (error = falloc(p, &wf, &fd)) 968 goto free3; 969 wf->f_flag = FWRITE; 970 wf->f_type = DTYPE_SOCKET; 971 wf->f_ops = &socketops; 972 wf->f_data = (caddr_t)wso; 973 retval[1] = fd; 974 if (error = unp_connect2(wso, rso)) 975 goto free4; 976 return (0); 977 free4: 978 ffree(wf); 979 fdp->fd_ofiles[retval[1]] = 0; 980 free3: 981 ffree(rf); 982 fdp->fd_ofiles[retval[0]] = 0; 983 free2: 984 (void)soclose(wso); 985 free1: 986 (void)soclose(rso); 987 return (error); 988 } 989 990 /* 991 * Get socket name. 992 */ 993 struct getsockname_args { 994 int fdes; 995 caddr_t asa; 996 int *alen; 997 #ifdef COMPAT_OLDSOCK 998 int compat_43; /* pseudo */ 999 #endif 1000 }; 1001 #ifdef COMPAT_OLDSOCK 1002 getsockname(p, uap, retval) 1003 struct proc *p; 1004 struct getsockname_args *uap; 1005 int *retval; 1006 { 1007 1008 uap->compat_43 = 0; 1009 return (getsockname1(p, uap, retval)); 1010 } 1011 1012 ogetsockname(p, uap, retval) 1013 struct proc *p; 1014 struct getsockname_args *uap; 1015 int *retval; 1016 { 1017 1018 uap->compat_43 = 1; 1019 return (getsockname1(p, uap, retval)); 1020 } 1021 #else /* COMPAT_OLDSOCK */ 1022 1023 #define getsockname1 getsockname 1024 #endif 1025 1026 /* ARGSUSED */ 1027 getsockname1(p, uap, retval) 1028 struct proc *p; 1029 register struct getsockname_args *uap; 1030 int *retval; 1031 { 1032 struct file *fp; 1033 register struct socket *so; 1034 struct mbuf *m; 1035 int len, error; 1036 1037 if (error = getsock(p->p_fd, uap->fdes, &fp)) 1038 return (error); 1039 if (error = copyin((caddr_t)uap->alen, (caddr_t)&len, sizeof (len))) 1040 return (error); 1041 so = (struct socket *)fp->f_data; 1042 m = m_getclr(M_WAIT, MT_SONAME); 1043 if (m == NULL) 1044 return (ENOBUFS); 1045 if (error = (*so->so_proto->pr_usrreq)(so, PRU_SOCKADDR, 0, m, 0)) 1046 goto bad; 1047 if (len > m->m_len) 1048 len = m->m_len; 1049 #ifdef COMPAT_OLDSOCK 1050 if (uap->compat_43) 1051 mtod(m, struct osockaddr *)->sa_family = 1052 mtod(m, struct sockaddr *)->sa_family; 1053 #endif 1054 error = copyout(mtod(m, caddr_t), (caddr_t)uap->asa, (u_int)len); 1055 if (error == 0) 1056 error = copyout((caddr_t)&len, (caddr_t)uap->alen, 1057 sizeof (len)); 1058 bad: 1059 m_freem(m); 1060 return (error); 1061 } 1062 1063 /* 1064 * Get name of peer for connected socket. 1065 */ 1066 struct getpeername_args { 1067 int fdes; 1068 caddr_t asa; 1069 int *alen; 1070 #ifdef COMPAT_OLDSOCK 1071 int compat_43; /* pseudo */ 1072 #endif 1073 }; 1074 1075 #ifdef COMPAT_OLDSOCK 1076 getpeername(p, uap, retval) 1077 struct proc *p; 1078 struct getpeername_args *uap; 1079 int *retval; 1080 { 1081 1082 uap->compat_43 = 0; 1083 return (getpeername1(p, uap, retval)); 1084 } 1085 1086 ogetpeername(p, uap, retval) 1087 struct proc *p; 1088 struct getpeername_args *uap; 1089 int *retval; 1090 { 1091 1092 uap->compat_43 = 1; 1093 return (getpeername1(p, uap, retval)); 1094 } 1095 #else /* COMPAT_OLDSOCK */ 1096 1097 #define getpeername1 getpeername 1098 #endif 1099 1100 /* ARGSUSED */ 1101 getpeername1(p, uap, retval) 1102 struct proc *p; 1103 register struct getpeername_args *uap; 1104 int *retval; 1105 { 1106 struct file *fp; 1107 register struct socket *so; 1108 struct mbuf *m; 1109 int len, error; 1110 1111 if (error = getsock(p->p_fd, uap->fdes, &fp)) 1112 return (error); 1113 so = (struct socket *)fp->f_data; 1114 if ((so->so_state & (SS_ISCONNECTED|SS_ISCONFIRMING)) == 0) 1115 return (ENOTCONN); 1116 if (error = copyin((caddr_t)uap->alen, (caddr_t)&len, sizeof (len))) 1117 return (error); 1118 m = m_getclr(M_WAIT, MT_SONAME); 1119 if (m == NULL) 1120 return (ENOBUFS); 1121 if (error = (*so->so_proto->pr_usrreq)(so, PRU_PEERADDR, 0, m, 0)) 1122 goto bad; 1123 if (len > m->m_len) 1124 len = m->m_len; 1125 #ifdef COMPAT_OLDSOCK 1126 if (uap->compat_43) 1127 mtod(m, struct osockaddr *)->sa_family = 1128 mtod(m, struct sockaddr *)->sa_family; 1129 #endif 1130 if (error = copyout(mtod(m, caddr_t), (caddr_t)uap->asa, (u_int)len)) 1131 goto bad; 1132 error = copyout((caddr_t)&len, (caddr_t)uap->alen, sizeof (len)); 1133 bad: 1134 m_freem(m); 1135 return (error); 1136 } 1137 1138 sockargs(mp, buf, buflen, type) 1139 struct mbuf **mp; 1140 caddr_t buf; 1141 int buflen, type; 1142 { 1143 register struct sockaddr *sa; 1144 register struct mbuf *m; 1145 int error; 1146 1147 if ((u_int)buflen > MLEN) { 1148 #ifdef COMPAT_OLDSOCK 1149 if (type == MT_SONAME && (u_int)buflen <= 112) 1150 buflen = MLEN; /* unix domain compat. hack */ 1151 else 1152 #endif 1153 return (EINVAL); 1154 } 1155 m = m_get(M_WAIT, type); 1156 if (m == NULL) 1157 return (ENOBUFS); 1158 m->m_len = buflen; 1159 error = copyin(buf, mtod(m, caddr_t), (u_int)buflen); 1160 if (error) 1161 (void) m_free(m); 1162 else { 1163 *mp = m; 1164 if (type == MT_SONAME) { 1165 sa = mtod(m, struct sockaddr *); 1166 1167 #if defined(COMPAT_OLDSOCK) && BYTE_ORDER != BIG_ENDIAN 1168 if (sa->sa_family == 0 && sa->sa_len < AF_MAX) 1169 sa->sa_family = sa->sa_len; 1170 #endif 1171 sa->sa_len = buflen; 1172 } 1173 } 1174 return (error); 1175 } 1176 1177 getsock(fdp, fdes, fpp) 1178 struct filedesc *fdp; 1179 int fdes; 1180 struct file **fpp; 1181 { 1182 register struct file *fp; 1183 1184 if ((unsigned)fdes >= fdp->fd_nfiles || 1185 (fp = fdp->fd_ofiles[fdes]) == NULL) 1186 return (EBADF); 1187 if (fp->f_type != DTYPE_SOCKET) 1188 return (ENOTSOCK); 1189 *fpp = fp; 1190 return (0); 1191 } 1192