2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1982, 1986, 1989, 1990, 1993
5 * The Regents of the University of California. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * @(#)uipc_syscalls.c 8.4 (Berkeley) 2/21/94
34 #include <sys/cdefs.h>
35 __FBSDID("$FreeBSD$");
37 #include "opt_capsicum.h"
39 #include "opt_inet6.h"
40 #include "opt_ktrace.h"
42 #include <sys/param.h>
43 #include <sys/systm.h>
44 #include <sys/capsicum.h>
45 #include <sys/kernel.h>
47 #include <sys/mutex.h>
48 #include <sys/sysproto.h>
49 #include <sys/malloc.h>
50 #include <sys/filedesc.h>
52 #include <sys/filio.h>
55 #include <sys/protosw.h>
56 #include <sys/rwlock.h>
57 #include <sys/socket.h>
58 #include <sys/socketvar.h>
59 #include <sys/syscallsubr.h>
61 #include <sys/sysent.h>
65 #include <sys/unpcb.h>
67 #include <sys/ktrace.h>
69 #ifdef COMPAT_FREEBSD32
70 #include <compat/freebsd32/freebsd32_util.h>
75 #include <security/audit/audit.h>
76 #include <security/mac/mac_framework.h>
78 static int sendit(struct thread *td, int s, struct msghdr *mp, int flags);
79 static int recvit(struct thread *td, int s, struct msghdr *mp, void *namelenp);
81 static int accept1(struct thread *td, int s, struct sockaddr *uname,
82 socklen_t *anamelen, int flags);
83 static int sockargs(struct mbuf **, char *, socklen_t, int);
86 * Convert a user file descriptor to a kernel file entry and check if required
87 * capability rights are present.
88 * If required copy of current set of capability rights is returned.
89 * A reference on the file entry is held upon returning.
92 getsock_cap(struct thread *td, int fd, cap_rights_t *rightsp,
93 struct file **fpp, u_int *fflagp, struct filecaps *havecapsp)
98 error = fget_cap(td, fd, rightsp, &fp, havecapsp);
101 if (fp->f_type != DTYPE_SOCKET) {
103 if (havecapsp != NULL)
104 filecaps_free(havecapsp);
108 *fflagp = fp->f_flag;
114 * System call interface to the socket abstraction.
116 #if defined(COMPAT_43)
117 #define COMPAT_OLDSOCK
121 sys_socket(struct thread *td, struct socket_args *uap)
124 return (kern_socket(td, uap->domain, uap->type, uap->protocol));
128 kern_socket(struct thread *td, int domain, int type, int protocol)
132 int fd, error, oflag, fflag;
134 AUDIT_ARG_SOCKET(domain, type, protocol);
138 if ((type & SOCK_CLOEXEC) != 0) {
139 type &= ~SOCK_CLOEXEC;
142 if ((type & SOCK_NONBLOCK) != 0) {
143 type &= ~SOCK_NONBLOCK;
148 error = mac_socket_check_create(td->td_ucred, domain, type, protocol);
152 error = falloc(td, &fp, &fd, oflag);
155 /* An extra reference on `fp' has been held for us by falloc(). */
156 error = socreate(domain, &so, type, protocol, td->td_ucred, td);
160 finit(fp, FREAD | FWRITE | fflag, DTYPE_SOCKET, so, &socketops);
161 if ((fflag & FNONBLOCK) != 0)
162 (void) fo_ioctl(fp, FIONBIO, &fflag, td->td_ucred, td);
163 td->td_retval[0] = fd;
170 sys_bind(struct thread *td, struct bind_args *uap)
175 error = getsockaddr(&sa, uap->name, uap->namelen);
177 error = kern_bindat(td, AT_FDCWD, uap->s, sa);
184 kern_bindat(struct thread *td, int dirfd, int fd, struct sockaddr *sa)
190 #ifdef CAPABILITY_MODE
191 if (IN_CAPABILITY_MODE(td) && (dirfd == AT_FDCWD))
196 AUDIT_ARG_SOCKADDR(td, dirfd, sa);
197 error = getsock_cap(td, fd, &cap_bind_rights,
203 if (KTRPOINT(td, KTR_STRUCT))
207 error = mac_socket_check_bind(td->td_ucred, so, sa);
210 if (dirfd == AT_FDCWD)
211 error = sobind(so, sa, td);
213 error = sobindat(dirfd, so, sa, td);
222 sys_bindat(struct thread *td, struct bindat_args *uap)
227 error = getsockaddr(&sa, uap->name, uap->namelen);
229 error = kern_bindat(td, uap->fd, uap->s, sa);
236 sys_listen(struct thread *td, struct listen_args *uap)
239 return (kern_listen(td, uap->s, uap->backlog));
243 kern_listen(struct thread *td, int s, int backlog)
250 error = getsock_cap(td, s, &cap_listen_rights,
255 error = mac_socket_check_listen(td->td_ucred, so);
258 error = solisten(so, backlog, td);
268 accept1(td, s, uname, anamelen, flags)
271 struct sockaddr *uname;
275 struct sockaddr *name;
281 return (kern_accept4(td, s, NULL, NULL, flags, NULL));
283 error = copyin(anamelen, &namelen, sizeof (namelen));
287 error = kern_accept4(td, s, &name, &namelen, flags, &fp);
292 if (error == 0 && uname != NULL) {
293 #ifdef COMPAT_OLDSOCK
294 if (SV_PROC_FLAG(td->td_proc, SV_AOUT) &&
295 (flags & ACCEPT4_COMPAT) != 0)
296 ((struct osockaddr *)name)->sa_family =
299 error = copyout(name, uname, namelen);
302 error = copyout(&namelen, anamelen,
305 fdclose(td, fp, td->td_retval[0]);
307 free(name, M_SONAME);
312 kern_accept(struct thread *td, int s, struct sockaddr **name,
313 socklen_t *namelen, struct file **fp)
315 return (kern_accept4(td, s, name, namelen, ACCEPT4_INHERIT, fp));
319 kern_accept4(struct thread *td, int s, struct sockaddr **name,
320 socklen_t *namelen, int flags, struct file **fp)
322 struct file *headfp, *nfp = NULL;
323 struct sockaddr *sa = NULL;
324 struct socket *head, *so;
325 struct filecaps fcaps;
334 error = getsock_cap(td, s, &cap_accept_rights,
335 &headfp, &fflag, &fcaps);
338 head = headfp->f_data;
339 if (!SOLISTENING(head)) {
344 error = mac_socket_check_accept(td->td_ucred, head);
348 error = falloc_caps(td, &nfp, &fd,
349 (flags & SOCK_CLOEXEC) ? O_CLOEXEC : 0, &fcaps);
353 if (!SOLISTENING(head)) {
359 error = solisten_dequeue(head, &so, flags);
363 /* An extra reference on `nfp' has been held for us by falloc(). */
364 td->td_retval[0] = fd;
366 /* Connection has been removed from the listen queue. */
367 KNOTE_UNLOCKED(&head->so_rdsel.si_note, 0);
369 if (flags & ACCEPT4_INHERIT) {
370 pgid = fgetown(&head->so_sigio);
372 fsetown(pgid, &so->so_sigio);
374 fflag &= ~(FNONBLOCK | FASYNC);
375 if (flags & SOCK_NONBLOCK)
379 finit(nfp, fflag, DTYPE_SOCKET, so, &socketops);
380 /* Sync socket nonblocking/async state with file flags */
381 tmp = fflag & FNONBLOCK;
382 (void) fo_ioctl(nfp, FIONBIO, &tmp, td->td_ucred, td);
383 tmp = fflag & FASYNC;
384 (void) fo_ioctl(nfp, FIOASYNC, &tmp, td->td_ucred, td);
385 error = soaccept(so, &sa);
393 AUDIT_ARG_SOCKADDR(td, AT_FDCWD, sa);
395 /* check sa_len before it is destroyed */
396 if (*namelen > sa->sa_len)
397 *namelen = sa->sa_len;
399 if (KTRPOINT(td, KTR_STRUCT))
409 * close the new descriptor, assuming someone hasn't ripped it
413 fdclose(td, nfp, fd);
416 * Release explicitly held references before returning. We return
417 * a reference on nfp to the caller on success if they request it.
421 filecaps_free(&fcaps);
438 struct accept_args *uap;
441 return (accept1(td, uap->s, uap->name, uap->anamelen, ACCEPT4_INHERIT));
447 struct accept4_args *uap;
450 if (uap->flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK))
453 return (accept1(td, uap->s, uap->name, uap->anamelen, uap->flags));
456 #ifdef COMPAT_OLDSOCK
458 oaccept(struct thread *td, struct oaccept_args *uap)
461 return (accept1(td, uap->s, uap->name, uap->anamelen,
462 ACCEPT4_INHERIT | ACCEPT4_COMPAT));
464 #endif /* COMPAT_OLDSOCK */
467 sys_connect(struct thread *td, struct connect_args *uap)
472 error = getsockaddr(&sa, uap->name, uap->namelen);
474 error = kern_connectat(td, AT_FDCWD, uap->s, sa);
481 kern_connectat(struct thread *td, int dirfd, int fd, struct sockaddr *sa)
487 #ifdef CAPABILITY_MODE
488 if (IN_CAPABILITY_MODE(td) && (dirfd == AT_FDCWD))
493 AUDIT_ARG_SOCKADDR(td, dirfd, sa);
494 error = getsock_cap(td, fd, &cap_connect_rights,
499 if (so->so_state & SS_ISCONNECTING) {
504 if (KTRPOINT(td, KTR_STRUCT))
508 error = mac_socket_check_connect(td->td_ucred, so, sa);
512 error = soconnectat(dirfd, so, sa, td);
515 if ((so->so_state & SS_NBIO) && (so->so_state & SS_ISCONNECTING)) {
520 while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) {
521 error = msleep(&so->so_timeo, &so->so_lock, PSOCK | PCATCH,
527 error = so->so_error;
532 if (error == ERESTART)
540 sys_connectat(struct thread *td, struct connectat_args *uap)
545 error = getsockaddr(&sa, uap->name, uap->namelen);
547 error = kern_connectat(td, uap->fd, uap->s, sa);
554 kern_socketpair(struct thread *td, int domain, int type, int protocol,
557 struct file *fp1, *fp2;
558 struct socket *so1, *so2;
559 int fd, error, oflag, fflag;
561 AUDIT_ARG_SOCKET(domain, type, protocol);
565 if ((type & SOCK_CLOEXEC) != 0) {
566 type &= ~SOCK_CLOEXEC;
569 if ((type & SOCK_NONBLOCK) != 0) {
570 type &= ~SOCK_NONBLOCK;
574 /* We might want to have a separate check for socket pairs. */
575 error = mac_socket_check_create(td->td_ucred, domain, type,
580 error = socreate(domain, &so1, type, protocol, td->td_ucred, td);
583 error = socreate(domain, &so2, type, protocol, td->td_ucred, td);
586 /* On success extra reference to `fp1' and 'fp2' is set by falloc. */
587 error = falloc(td, &fp1, &fd, oflag);
591 fp1->f_data = so1; /* so1 already has ref count */
592 error = falloc(td, &fp2, &fd, oflag);
595 fp2->f_data = so2; /* so2 already has ref count */
597 error = soconnect2(so1, so2);
600 if (type == SOCK_DGRAM) {
602 * Datagram socket connection is asymmetric.
604 error = soconnect2(so2, so1);
607 } else if (so1->so_proto->pr_flags & PR_CONNREQUIRED) {
608 struct unpcb *unp, *unp2;
609 unp = sotounpcb(so1);
610 unp2 = sotounpcb(so2);
612 * No need to lock the unps, because the sockets are brand-new.
613 * No other threads can be using them yet
615 unp_copy_peercred(td, unp, unp2, unp);
617 finit(fp1, FREAD | FWRITE | fflag, DTYPE_SOCKET, fp1->f_data,
619 finit(fp2, FREAD | FWRITE | fflag, DTYPE_SOCKET, fp2->f_data,
621 if ((fflag & FNONBLOCK) != 0) {
622 (void) fo_ioctl(fp1, FIONBIO, &fflag, td->td_ucred, td);
623 (void) fo_ioctl(fp2, FIONBIO, &fflag, td->td_ucred, td);
629 fdclose(td, fp2, rsv[1]);
632 fdclose(td, fp1, rsv[0]);
644 sys_socketpair(struct thread *td, struct socketpair_args *uap)
648 error = kern_socketpair(td, uap->domain, uap->type,
652 error = copyout(sv, uap->rsv, 2 * sizeof(int));
654 (void)kern_close(td, sv[0]);
655 (void)kern_close(td, sv[1]);
661 sendit(struct thread *td, int s, struct msghdr *mp, int flags)
663 struct mbuf *control;
667 #ifdef CAPABILITY_MODE
668 if (IN_CAPABILITY_MODE(td) && (mp->msg_name != NULL))
672 if (mp->msg_name != NULL) {
673 error = getsockaddr(&to, mp->msg_name, mp->msg_namelen);
683 if (mp->msg_control) {
684 if (mp->msg_controllen < sizeof(struct cmsghdr)
685 #ifdef COMPAT_OLDSOCK
686 && (mp->msg_flags != MSG_COMPAT ||
687 !SV_PROC_FLAG(td->td_proc, SV_AOUT))
693 error = sockargs(&control, mp->msg_control,
694 mp->msg_controllen, MT_CONTROL);
697 #ifdef COMPAT_OLDSOCK
698 if (mp->msg_flags == MSG_COMPAT &&
699 SV_PROC_FLAG(td->td_proc, SV_AOUT)) {
702 M_PREPEND(control, sizeof(*cm), M_WAITOK);
703 cm = mtod(control, struct cmsghdr *);
704 cm->cmsg_len = control->m_len;
705 cm->cmsg_level = SOL_SOCKET;
706 cm->cmsg_type = SCM_RIGHTS;
713 error = kern_sendit(td, s, mp, flags, control, UIO_USERSPACE);
721 kern_sendit(struct thread *td, int s, struct msghdr *mp, int flags,
722 struct mbuf *control, enum uio_seg segflg)
728 cap_rights_t *rights;
730 struct uio *ktruio = NULL;
736 rights = &cap_send_rights;
737 if (mp->msg_name != NULL) {
738 AUDIT_ARG_SOCKADDR(td, AT_FDCWD, mp->msg_name);
739 rights = &cap_send_connect_rights;
741 error = getsock_cap(td, s, rights, &fp, NULL, NULL);
746 so = (struct socket *)fp->f_data;
749 if (mp->msg_name != NULL && KTRPOINT(td, KTR_STRUCT))
750 ktrsockaddr(mp->msg_name);
753 if (mp->msg_name != NULL) {
754 error = mac_socket_check_connect(td->td_ucred, so,
761 error = mac_socket_check_send(td->td_ucred, so);
768 auio.uio_iov = mp->msg_iov;
769 auio.uio_iovcnt = mp->msg_iovlen;
770 auio.uio_segflg = segflg;
771 auio.uio_rw = UIO_WRITE;
773 auio.uio_offset = 0; /* XXX */
776 for (i = 0; i < mp->msg_iovlen; i++, iov++) {
777 if ((auio.uio_resid += iov->iov_len) < 0) {
784 if (KTRPOINT(td, KTR_GENIO))
785 ktruio = cloneuio(&auio);
787 len = auio.uio_resid;
788 error = sosend(so, mp->msg_name, &auio, 0, control, flags, td);
790 if (auio.uio_resid != len &&
791 (so->so_proto->pr_flags & PR_ATOMIC) == 0 &&
792 (error == ERESTART || error == EINTR ||
793 error == EWOULDBLOCK))
795 /* Generation of SIGPIPE can be controlled per socket */
796 if (error == EPIPE && !(so->so_options & SO_NOSIGPIPE) &&
797 !(flags & MSG_NOSIGNAL)) {
798 PROC_LOCK(td->td_proc);
799 tdsignal(td, SIGPIPE);
800 PROC_UNLOCK(td->td_proc);
804 td->td_retval[0] = len - auio.uio_resid;
806 if (ktruio != NULL) {
807 ktruio->uio_resid = td->td_retval[0];
808 ktrgenio(s, UIO_WRITE, ktruio, error);
817 sys_sendto(struct thread *td, struct sendto_args *uap)
822 msg.msg_name = __DECONST(void *, uap->to);
823 msg.msg_namelen = uap->tolen;
827 #ifdef COMPAT_OLDSOCK
828 if (SV_PROC_FLAG(td->td_proc, SV_AOUT))
831 aiov.iov_base = __DECONST(void *, uap->buf);
832 aiov.iov_len = uap->len;
833 return (sendit(td, uap->s, &msg, uap->flags));
836 #ifdef COMPAT_OLDSOCK
838 osend(struct thread *td, struct osend_args *uap)
847 aiov.iov_base = __DECONST(void *, uap->buf);
848 aiov.iov_len = uap->len;
851 return (sendit(td, uap->s, &msg, uap->flags));
855 osendmsg(struct thread *td, struct osendmsg_args *uap)
861 error = copyin(uap->msg, &msg, sizeof (struct omsghdr));
864 error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE);
868 msg.msg_flags = MSG_COMPAT;
869 error = sendit(td, uap->s, &msg, uap->flags);
876 sys_sendmsg(struct thread *td, struct sendmsg_args *uap)
882 error = copyin(uap->msg, &msg, sizeof (msg));
885 error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE);
889 #ifdef COMPAT_OLDSOCK
890 if (SV_PROC_FLAG(td->td_proc, SV_AOUT))
893 error = sendit(td, uap->s, &msg, uap->flags);
899 kern_recvit(struct thread *td, int s, struct msghdr *mp, enum uio_seg fromseg,
900 struct mbuf **controlp)
904 struct mbuf *control, *m;
908 struct sockaddr *fromsa = NULL;
910 struct uio *ktruio = NULL;
915 if (controlp != NULL)
919 error = getsock_cap(td, s, &cap_recv_rights,
926 error = mac_socket_check_receive(td->td_ucred, so);
933 auio.uio_iov = mp->msg_iov;
934 auio.uio_iovcnt = mp->msg_iovlen;
935 auio.uio_segflg = UIO_USERSPACE;
936 auio.uio_rw = UIO_READ;
938 auio.uio_offset = 0; /* XXX */
941 for (i = 0; i < mp->msg_iovlen; i++, iov++) {
942 if ((auio.uio_resid += iov->iov_len) < 0) {
948 if (KTRPOINT(td, KTR_GENIO))
949 ktruio = cloneuio(&auio);
952 len = auio.uio_resid;
953 error = soreceive(so, &fromsa, &auio, NULL,
954 (mp->msg_control || controlp) ? &control : NULL,
957 if (auio.uio_resid != len && (error == ERESTART ||
958 error == EINTR || error == EWOULDBLOCK))
962 AUDIT_ARG_SOCKADDR(td, AT_FDCWD, fromsa);
964 if (ktruio != NULL) {
965 ktruio->uio_resid = len - auio.uio_resid;
966 ktrgenio(s, UIO_READ, ktruio, error);
971 td->td_retval[0] = len - auio.uio_resid;
973 len = mp->msg_namelen;
974 if (len <= 0 || fromsa == NULL)
977 /* save sa_len before it is destroyed by MSG_COMPAT */
978 len = MIN(len, fromsa->sa_len);
979 #ifdef COMPAT_OLDSOCK
980 if ((mp->msg_flags & MSG_COMPAT) != 0 &&
981 SV_PROC_FLAG(td->td_proc, SV_AOUT))
982 ((struct osockaddr *)fromsa)->sa_family =
985 if (fromseg == UIO_USERSPACE) {
986 error = copyout(fromsa, mp->msg_name,
991 bcopy(fromsa, mp->msg_name, len);
993 mp->msg_namelen = len;
995 if (mp->msg_control && controlp == NULL) {
996 #ifdef COMPAT_OLDSOCK
998 * We assume that old recvmsg calls won't receive access
999 * rights and other control info, esp. as control info
1000 * is always optional and those options didn't exist in 4.3.
1001 * If we receive rights, trim the cmsghdr; anything else
1004 if (control && (mp->msg_flags & MSG_COMPAT) != 0 &&
1005 SV_PROC_FLAG(td->td_proc, SV_AOUT)) {
1006 if (mtod(control, struct cmsghdr *)->cmsg_level !=
1008 mtod(control, struct cmsghdr *)->cmsg_type !=
1010 mp->msg_controllen = 0;
1013 control->m_len -= sizeof (struct cmsghdr);
1014 control->m_data += sizeof (struct cmsghdr);
1017 ctlbuf = mp->msg_control;
1018 len = mp->msg_controllen;
1019 mp->msg_controllen = 0;
1020 for (m = control; m != NULL && len >= m->m_len; m = m->m_next) {
1021 if ((error = copyout(mtod(m, caddr_t), ctlbuf,
1027 mp->msg_controllen += m->m_len;
1030 mp->msg_flags |= MSG_CTRUNC;
1031 m_dispose_extcontrolm(m);
1037 if (fromsa && KTRPOINT(td, KTR_STRUCT))
1038 ktrsockaddr(fromsa);
1040 free(fromsa, M_SONAME);
1042 if (error == 0 && controlp != NULL)
1043 *controlp = control;
1044 else if (control != NULL) {
1046 m_dispose_extcontrolm(control);
1054 recvit(struct thread *td, int s, struct msghdr *mp, void *namelenp)
1058 error = kern_recvit(td, s, mp, UIO_USERSPACE, NULL);
1061 if (namelenp != NULL) {
1062 error = copyout(&mp->msg_namelen, namelenp, sizeof (socklen_t));
1063 #ifdef COMPAT_OLDSOCK
1064 if ((mp->msg_flags & MSG_COMPAT) != 0 &&
1065 SV_PROC_FLAG(td->td_proc, SV_AOUT))
1066 error = 0; /* old recvfrom didn't check */
1073 kern_recvfrom(struct thread *td, int s, void *buf, size_t len, int flags,
1074 struct sockaddr *from, socklen_t *fromlenaddr)
1080 if (fromlenaddr != NULL) {
1081 error = copyin(fromlenaddr, &msg.msg_namelen,
1082 sizeof (msg.msg_namelen));
1086 msg.msg_namelen = 0;
1088 msg.msg_name = from;
1089 msg.msg_iov = &aiov;
1091 aiov.iov_base = buf;
1093 msg.msg_control = 0;
1094 msg.msg_flags = flags;
1095 error = recvit(td, s, &msg, fromlenaddr);
1101 sys_recvfrom(struct thread *td, struct recvfrom_args *uap)
1103 return (kern_recvfrom(td, uap->s, uap->buf, uap->len,
1104 uap->flags, uap->from, uap->fromlenaddr));
1108 #ifdef COMPAT_OLDSOCK
1110 orecvfrom(struct thread *td, struct orecvfrom_args *uap)
1112 return (kern_recvfrom(td, uap->s, uap->buf, uap->len,
1113 uap->flags | MSG_COMPAT, uap->from, uap->fromlenaddr));
1117 #ifdef COMPAT_OLDSOCK
1119 orecv(struct thread *td, struct orecv_args *uap)
1125 msg.msg_namelen = 0;
1126 msg.msg_iov = &aiov;
1128 aiov.iov_base = uap->buf;
1129 aiov.iov_len = uap->len;
1130 msg.msg_control = 0;
1131 msg.msg_flags = uap->flags;
1132 return (recvit(td, uap->s, &msg, NULL));
1136 * Old recvmsg. This code takes advantage of the fact that the old msghdr
1137 * overlays the new one, missing only the flags, and with the (old) access
1138 * rights where the control fields are now.
1141 orecvmsg(struct thread *td, struct orecvmsg_args *uap)
1147 error = copyin(uap->msg, &msg, sizeof (struct omsghdr));
1150 error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE);
1153 msg.msg_flags = uap->flags | MSG_COMPAT;
1155 error = recvit(td, uap->s, &msg, &uap->msg->msg_namelen);
1156 if (msg.msg_controllen && error == 0)
1157 error = copyout(&msg.msg_controllen,
1158 &uap->msg->msg_accrightslen, sizeof (int));
1165 sys_recvmsg(struct thread *td, struct recvmsg_args *uap)
1168 struct iovec *uiov, *iov;
1171 error = copyin(uap->msg, &msg, sizeof (msg));
1174 error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE);
1177 msg.msg_flags = uap->flags;
1178 #ifdef COMPAT_OLDSOCK
1179 if (SV_PROC_FLAG(td->td_proc, SV_AOUT))
1180 msg.msg_flags &= ~MSG_COMPAT;
1184 error = recvit(td, uap->s, &msg, NULL);
1187 error = copyout(&msg, uap->msg, sizeof(msg));
1194 sys_shutdown(struct thread *td, struct shutdown_args *uap)
1197 return (kern_shutdown(td, uap->s, uap->how));
1201 kern_shutdown(struct thread *td, int s, int how)
1208 error = getsock_cap(td, s, &cap_shutdown_rights,
1212 error = soshutdown(so, how);
1214 * Previous versions did not return ENOTCONN, but 0 in
1215 * case the socket was not connected. Some important
1216 * programs like syslogd up to r279016, 2015-02-19,
1217 * still depend on this behavior.
1219 if (error == ENOTCONN &&
1220 td->td_proc->p_osrel < P_OSREL_SHUTDOWN_ENOTCONN)
1228 sys_setsockopt(struct thread *td, struct setsockopt_args *uap)
1231 return (kern_setsockopt(td, uap->s, uap->level, uap->name,
1232 uap->val, UIO_USERSPACE, uap->valsize));
1236 kern_setsockopt(struct thread *td, int s, int level, int name, const void *val,
1237 enum uio_seg valseg, socklen_t valsize)
1241 struct sockopt sopt;
1244 if (val == NULL && valsize != 0)
1246 if ((int)valsize < 0)
1249 sopt.sopt_dir = SOPT_SET;
1250 sopt.sopt_level = level;
1251 sopt.sopt_name = name;
1252 sopt.sopt_val = __DECONST(void *, val);
1253 sopt.sopt_valsize = valsize;
1259 sopt.sopt_td = NULL;
1262 panic("kern_setsockopt called with bad valseg");
1266 error = getsock_cap(td, s, &cap_setsockopt_rights,
1270 error = sosetopt(so, &sopt);
1277 sys_getsockopt(struct thread *td, struct getsockopt_args *uap)
1283 error = copyin(uap->avalsize, &valsize, sizeof (valsize));
1288 error = kern_getsockopt(td, uap->s, uap->level, uap->name,
1289 uap->val, UIO_USERSPACE, &valsize);
1292 error = copyout(&valsize, uap->avalsize, sizeof (valsize));
1297 * Kernel version of getsockopt.
1298 * optval can be a userland or userspace. optlen is always a kernel pointer.
1301 kern_getsockopt(struct thread *td, int s, int level, int name, void *val,
1302 enum uio_seg valseg, socklen_t *valsize)
1306 struct sockopt sopt;
1311 if ((int)*valsize < 0)
1314 sopt.sopt_dir = SOPT_GET;
1315 sopt.sopt_level = level;
1316 sopt.sopt_name = name;
1317 sopt.sopt_val = val;
1318 sopt.sopt_valsize = (size_t)*valsize; /* checked non-negative above */
1324 sopt.sopt_td = NULL;
1327 panic("kern_getsockopt called with bad valseg");
1331 error = getsock_cap(td, s, &cap_getsockopt_rights,
1335 error = sogetopt(so, &sopt);
1336 *valsize = sopt.sopt_valsize;
1343 user_getsockname(struct thread *td, int fdes, struct sockaddr *asa,
1344 socklen_t *alen, bool compat)
1346 struct sockaddr *sa;
1350 error = copyin(alen, &len, sizeof(len));
1354 error = kern_getsockname(td, fdes, &sa, &len);
1359 #ifdef COMPAT_OLDSOCK
1360 if (compat && SV_PROC_FLAG(td->td_proc, SV_AOUT))
1361 ((struct osockaddr *)sa)->sa_family = sa->sa_family;
1363 error = copyout(sa, asa, len);
1367 error = copyout(&len, alen, sizeof(len));
1372 kern_getsockname(struct thread *td, int fd, struct sockaddr **sa,
1381 error = getsock_cap(td, fd, &cap_getsockname_rights,
1387 CURVNET_SET(so->so_vnet);
1388 error = (*so->so_proto->pr_usrreqs->pru_sockaddr)(so, sa);
1395 len = MIN(*alen, (*sa)->sa_len);
1398 if (KTRPOINT(td, KTR_STRUCT))
1403 if (error != 0 && *sa != NULL) {
1404 free(*sa, M_SONAME);
1411 sys_getsockname(struct thread *td, struct getsockname_args *uap)
1413 return (user_getsockname(td, uap->fdes, uap->asa, uap->alen, false));
1416 #ifdef COMPAT_OLDSOCK
1418 ogetsockname(struct thread *td, struct ogetsockname_args *uap)
1420 return (user_getsockname(td, uap->fdes, uap->asa, uap->alen, true));
1422 #endif /* COMPAT_OLDSOCK */
1425 user_getpeername(struct thread *td, int fdes, struct sockaddr *asa,
1426 socklen_t *alen, bool compat)
1428 struct sockaddr *sa;
1432 error = copyin(alen, &len, sizeof (len));
1436 error = kern_getpeername(td, fdes, &sa, &len);
1441 #ifdef COMPAT_OLDSOCK
1442 if (compat && SV_PROC_FLAG(td->td_proc, SV_AOUT))
1443 ((struct osockaddr *)sa)->sa_family = sa->sa_family;
1445 error = copyout(sa, asa, len);
1449 error = copyout(&len, alen, sizeof(len));
1454 kern_getpeername(struct thread *td, int fd, struct sockaddr **sa,
1463 error = getsock_cap(td, fd, &cap_getpeername_rights,
1468 if ((so->so_state & (SS_ISCONNECTED|SS_ISCONFIRMING)) == 0) {
1473 CURVNET_SET(so->so_vnet);
1474 error = (*so->so_proto->pr_usrreqs->pru_peeraddr)(so, sa);
1481 len = MIN(*alen, (*sa)->sa_len);
1484 if (KTRPOINT(td, KTR_STRUCT))
1488 if (error != 0 && *sa != NULL) {
1489 free(*sa, M_SONAME);
1498 sys_getpeername(struct thread *td, struct getpeername_args *uap)
1500 return (user_getpeername(td, uap->fdes, uap->asa, uap->alen, false));
1503 #ifdef COMPAT_OLDSOCK
1505 ogetpeername(struct thread *td, struct ogetpeername_args *uap)
1507 return (user_getpeername(td, uap->fdes, uap->asa, uap->alen, true));
1509 #endif /* COMPAT_OLDSOCK */
1512 sockargs(struct mbuf **mp, char *buf, socklen_t buflen, int type)
1514 struct sockaddr *sa;
1518 if (buflen > MLEN) {
1519 #ifdef COMPAT_OLDSOCK
1520 if (type == MT_SONAME && buflen <= 112 &&
1521 SV_CURPROC_FLAG(SV_AOUT))
1522 buflen = MLEN; /* unix domain compat. hack */
1525 if (buflen > MCLBYTES)
1528 m = m_get2(buflen, M_WAITOK, type, 0);
1530 error = copyin(buf, mtod(m, void *), buflen);
1535 if (type == MT_SONAME) {
1536 sa = mtod(m, struct sockaddr *);
1538 #if defined(COMPAT_OLDSOCK) && BYTE_ORDER != BIG_ENDIAN
1539 if (sa->sa_family == 0 && sa->sa_len < AF_MAX &&
1540 SV_CURPROC_FLAG(SV_AOUT))
1541 sa->sa_family = sa->sa_len;
1543 sa->sa_len = buflen;
1550 getsockaddr(struct sockaddr **namp, const struct sockaddr *uaddr, size_t len)
1552 struct sockaddr *sa;
1555 if (len > SOCK_MAXADDRLEN)
1556 return (ENAMETOOLONG);
1557 if (len < offsetof(struct sockaddr, sa_data[0]))
1559 sa = malloc(len, M_SONAME, M_WAITOK);
1560 error = copyin(uaddr, sa, len);
1564 #if defined(COMPAT_OLDSOCK) && BYTE_ORDER != BIG_ENDIAN
1565 if (sa->sa_family == 0 && sa->sa_len < AF_MAX &&
1566 SV_CURPROC_FLAG(SV_AOUT))
1567 sa->sa_family = sa->sa_len;
1576 * Dispose of externalized rights from an SCM_RIGHTS message. This function
1577 * should be used in error or truncation cases to avoid leaking file descriptors
1578 * into the recipient's (the current thread's) table.
1581 m_dispose_extcontrolm(struct mbuf *m)
1586 socklen_t clen, datalen;
1587 int error, fd, *fds, nfd;
1590 for (; m != NULL; m = m->m_next) {
1591 if (m->m_type != MT_EXTCONTROL)
1593 cm = mtod(m, struct cmsghdr *);
1596 if (clen < sizeof(*cm))
1597 panic("%s: truncated mbuf %p", __func__, m);
1598 datalen = CMSG_SPACE(cm->cmsg_len - CMSG_SPACE(0));
1600 panic("%s: truncated mbuf %p", __func__, m);
1602 if (cm->cmsg_level == SOL_SOCKET &&
1603 cm->cmsg_type == SCM_RIGHTS) {
1604 fds = (int *)CMSG_DATA(cm);
1605 nfd = (cm->cmsg_len - CMSG_SPACE(0)) /
1610 error = fget(td, fd, &cap_no_rights,
1613 fdclose(td, fp, fd);
1619 cm = (struct cmsghdr *)((uint8_t *)cm + datalen);
1621 m_chtype(m, MT_CONTROL);