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.
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8 * modification, are permitted provided that the following conditions
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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
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21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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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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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>
60 #include <sys/sysent.h>
63 #include <sys/unpcb.h>
65 #include <sys/ktrace.h>
67 #ifdef COMPAT_FREEBSD32
68 #include <compat/freebsd32/freebsd32_util.h>
73 #include <security/audit/audit.h>
74 #include <security/mac/mac_framework.h>
76 static int sendit(struct thread *td, int s, struct msghdr *mp, int flags);
77 static int recvit(struct thread *td, int s, struct msghdr *mp, void *namelenp);
79 static int accept1(struct thread *td, int s, struct sockaddr *uname,
80 socklen_t *anamelen, int flags);
81 static int getsockname1(struct thread *td, struct getsockname_args *uap,
83 static int getpeername1(struct thread *td, struct getpeername_args *uap,
85 static int sockargs(struct mbuf **, char *, socklen_t, int);
88 * Convert a user file descriptor to a kernel file entry and check if required
89 * capability rights are present.
90 * If required copy of current set of capability rights is returned.
91 * A reference on the file entry is held upon returning.
94 getsock_cap(struct thread *td, int fd, cap_rights_t *rightsp,
95 struct file **fpp, u_int *fflagp, struct filecaps *havecapsp)
100 error = fget_cap(td, fd, rightsp, &fp, havecapsp);
103 if (fp->f_type != DTYPE_SOCKET) {
105 if (havecapsp != NULL)
106 filecaps_free(havecapsp);
110 *fflagp = fp->f_flag;
116 * System call interface to the socket abstraction.
118 #if defined(COMPAT_43)
119 #define COMPAT_OLDSOCK
123 sys_socket(struct thread *td, struct socket_args *uap)
126 return (kern_socket(td, uap->domain, uap->type, uap->protocol));
130 kern_socket(struct thread *td, int domain, int type, int protocol)
134 int fd, error, oflag, fflag;
136 AUDIT_ARG_SOCKET(domain, type, protocol);
140 if ((type & SOCK_CLOEXEC) != 0) {
141 type &= ~SOCK_CLOEXEC;
144 if ((type & SOCK_NONBLOCK) != 0) {
145 type &= ~SOCK_NONBLOCK;
150 error = mac_socket_check_create(td->td_ucred, domain, type, protocol);
154 error = falloc(td, &fp, &fd, oflag);
157 /* An extra reference on `fp' has been held for us by falloc(). */
158 error = socreate(domain, &so, type, protocol, td->td_ucred, td);
162 finit(fp, FREAD | FWRITE | fflag, DTYPE_SOCKET, so, &socketops);
163 if ((fflag & FNONBLOCK) != 0)
164 (void) fo_ioctl(fp, FIONBIO, &fflag, td->td_ucred, td);
165 td->td_retval[0] = fd;
172 sys_bind(struct thread *td, struct bind_args *uap)
177 error = getsockaddr(&sa, uap->name, uap->namelen);
179 error = kern_bindat(td, AT_FDCWD, uap->s, sa);
186 kern_bindat(struct thread *td, int dirfd, int fd, struct sockaddr *sa)
192 #ifdef CAPABILITY_MODE
193 if (IN_CAPABILITY_MODE(td) && (dirfd == AT_FDCWD))
198 AUDIT_ARG_SOCKADDR(td, dirfd, sa);
199 error = getsock_cap(td, fd, &cap_bind_rights,
205 if (KTRPOINT(td, KTR_STRUCT))
209 error = mac_socket_check_bind(td->td_ucred, so, sa);
212 if (dirfd == AT_FDCWD)
213 error = sobind(so, sa, td);
215 error = sobindat(dirfd, so, sa, td);
224 sys_bindat(struct thread *td, struct bindat_args *uap)
229 error = getsockaddr(&sa, uap->name, uap->namelen);
231 error = kern_bindat(td, uap->fd, uap->s, sa);
238 sys_listen(struct thread *td, struct listen_args *uap)
241 return (kern_listen(td, uap->s, uap->backlog));
245 kern_listen(struct thread *td, int s, int backlog)
252 error = getsock_cap(td, s, &cap_listen_rights,
257 error = mac_socket_check_listen(td->td_ucred, so);
260 error = solisten(so, backlog, td);
270 accept1(td, s, uname, anamelen, flags)
273 struct sockaddr *uname;
277 struct sockaddr *name;
283 return (kern_accept4(td, s, NULL, NULL, flags, NULL));
285 error = copyin(anamelen, &namelen, sizeof (namelen));
289 error = kern_accept4(td, s, &name, &namelen, flags, &fp);
294 if (error == 0 && uname != NULL) {
295 #ifdef COMPAT_OLDSOCK
296 if (SV_PROC_FLAG(td->td_proc, SV_AOUT) &&
297 (flags & ACCEPT4_COMPAT) != 0)
298 ((struct osockaddr *)name)->sa_family =
301 error = copyout(name, uname, namelen);
304 error = copyout(&namelen, anamelen,
307 fdclose(td, fp, td->td_retval[0]);
309 free(name, M_SONAME);
314 kern_accept(struct thread *td, int s, struct sockaddr **name,
315 socklen_t *namelen, struct file **fp)
317 return (kern_accept4(td, s, name, namelen, ACCEPT4_INHERIT, fp));
321 kern_accept4(struct thread *td, int s, struct sockaddr **name,
322 socklen_t *namelen, int flags, struct file **fp)
324 struct file *headfp, *nfp = NULL;
325 struct sockaddr *sa = NULL;
326 struct socket *head, *so;
327 struct filecaps fcaps;
336 error = getsock_cap(td, s, &cap_accept_rights,
337 &headfp, &fflag, &fcaps);
340 head = headfp->f_data;
341 if (!SOLISTENING(head)) {
346 error = mac_socket_check_accept(td->td_ucred, head);
350 error = falloc_caps(td, &nfp, &fd,
351 (flags & SOCK_CLOEXEC) ? O_CLOEXEC : 0, &fcaps);
355 if (!SOLISTENING(head)) {
361 error = solisten_dequeue(head, &so, flags);
365 /* An extra reference on `nfp' has been held for us by falloc(). */
366 td->td_retval[0] = fd;
368 /* Connection has been removed from the listen queue. */
369 KNOTE_UNLOCKED(&head->so_rdsel.si_note, 0);
371 if (flags & ACCEPT4_INHERIT) {
372 pgid = fgetown(&head->so_sigio);
374 fsetown(pgid, &so->so_sigio);
376 fflag &= ~(FNONBLOCK | FASYNC);
377 if (flags & SOCK_NONBLOCK)
381 finit(nfp, fflag, DTYPE_SOCKET, so, &socketops);
382 /* Sync socket nonblocking/async state with file flags */
383 tmp = fflag & FNONBLOCK;
384 (void) fo_ioctl(nfp, FIONBIO, &tmp, td->td_ucred, td);
385 tmp = fflag & FASYNC;
386 (void) fo_ioctl(nfp, FIOASYNC, &tmp, td->td_ucred, td);
387 error = soaccept(so, &sa);
395 AUDIT_ARG_SOCKADDR(td, AT_FDCWD, sa);
397 /* check sa_len before it is destroyed */
398 if (*namelen > sa->sa_len)
399 *namelen = sa->sa_len;
401 if (KTRPOINT(td, KTR_STRUCT))
411 * close the new descriptor, assuming someone hasn't ripped it
415 fdclose(td, nfp, fd);
418 * Release explicitly held references before returning. We return
419 * a reference on nfp to the caller on success if they request it.
423 filecaps_free(&fcaps);
440 struct accept_args *uap;
443 return (accept1(td, uap->s, uap->name, uap->anamelen, ACCEPT4_INHERIT));
449 struct accept4_args *uap;
452 if (uap->flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK))
455 return (accept1(td, uap->s, uap->name, uap->anamelen, uap->flags));
458 #ifdef COMPAT_OLDSOCK
460 oaccept(struct thread *td, struct oaccept_args *uap)
463 return (accept1(td, uap->s, uap->name, uap->anamelen,
464 ACCEPT4_INHERIT | ACCEPT4_COMPAT));
466 #endif /* COMPAT_OLDSOCK */
469 sys_connect(struct thread *td, struct connect_args *uap)
474 error = getsockaddr(&sa, uap->name, uap->namelen);
476 error = kern_connectat(td, AT_FDCWD, uap->s, sa);
483 kern_connectat(struct thread *td, int dirfd, int fd, struct sockaddr *sa)
489 #ifdef CAPABILITY_MODE
490 if (IN_CAPABILITY_MODE(td) && (dirfd == AT_FDCWD))
495 AUDIT_ARG_SOCKADDR(td, dirfd, sa);
496 error = getsock_cap(td, fd, &cap_connect_rights,
501 if (so->so_state & SS_ISCONNECTING) {
506 if (KTRPOINT(td, KTR_STRUCT))
510 error = mac_socket_check_connect(td->td_ucred, so, sa);
514 error = soconnectat(dirfd, so, sa, td);
517 if ((so->so_state & SS_NBIO) && (so->so_state & SS_ISCONNECTING)) {
522 while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) {
523 error = msleep(&so->so_timeo, &so->so_lock, PSOCK | PCATCH,
529 error = so->so_error;
534 if (error == ERESTART)
542 sys_connectat(struct thread *td, struct connectat_args *uap)
547 error = getsockaddr(&sa, uap->name, uap->namelen);
549 error = kern_connectat(td, uap->fd, uap->s, sa);
556 kern_socketpair(struct thread *td, int domain, int type, int protocol,
559 struct file *fp1, *fp2;
560 struct socket *so1, *so2;
561 int fd, error, oflag, fflag;
563 AUDIT_ARG_SOCKET(domain, type, protocol);
567 if ((type & SOCK_CLOEXEC) != 0) {
568 type &= ~SOCK_CLOEXEC;
571 if ((type & SOCK_NONBLOCK) != 0) {
572 type &= ~SOCK_NONBLOCK;
576 /* We might want to have a separate check for socket pairs. */
577 error = mac_socket_check_create(td->td_ucred, domain, type,
582 error = socreate(domain, &so1, type, protocol, td->td_ucred, td);
585 error = socreate(domain, &so2, type, protocol, td->td_ucred, td);
588 /* On success extra reference to `fp1' and 'fp2' is set by falloc. */
589 error = falloc(td, &fp1, &fd, oflag);
593 fp1->f_data = so1; /* so1 already has ref count */
594 error = falloc(td, &fp2, &fd, oflag);
597 fp2->f_data = so2; /* so2 already has ref count */
599 error = soconnect2(so1, so2);
602 if (type == SOCK_DGRAM) {
604 * Datagram socket connection is asymmetric.
606 error = soconnect2(so2, so1);
609 } else if (so1->so_proto->pr_flags & PR_CONNREQUIRED) {
610 struct unpcb *unp, *unp2;
611 unp = sotounpcb(so1);
612 unp2 = sotounpcb(so2);
614 * No need to lock the unps, because the sockets are brand-new.
615 * No other threads can be using them yet
617 unp_copy_peercred(td, unp, unp2, unp);
619 finit(fp1, FREAD | FWRITE | fflag, DTYPE_SOCKET, fp1->f_data,
621 finit(fp2, FREAD | FWRITE | fflag, DTYPE_SOCKET, fp2->f_data,
623 if ((fflag & FNONBLOCK) != 0) {
624 (void) fo_ioctl(fp1, FIONBIO, &fflag, td->td_ucred, td);
625 (void) fo_ioctl(fp2, FIONBIO, &fflag, td->td_ucred, td);
631 fdclose(td, fp2, rsv[1]);
634 fdclose(td, fp1, rsv[0]);
646 sys_socketpair(struct thread *td, struct socketpair_args *uap)
650 error = kern_socketpair(td, uap->domain, uap->type,
654 error = copyout(sv, uap->rsv, 2 * sizeof(int));
656 (void)kern_close(td, sv[0]);
657 (void)kern_close(td, sv[1]);
663 sendit(struct thread *td, int s, struct msghdr *mp, int flags)
665 struct mbuf *control;
669 #ifdef CAPABILITY_MODE
670 if (IN_CAPABILITY_MODE(td) && (mp->msg_name != NULL))
674 if (mp->msg_name != NULL) {
675 error = getsockaddr(&to, mp->msg_name, mp->msg_namelen);
685 if (mp->msg_control) {
686 if (mp->msg_controllen < sizeof(struct cmsghdr)
687 #ifdef COMPAT_OLDSOCK
688 && (mp->msg_flags != MSG_COMPAT ||
689 !SV_PROC_FLAG(td->td_proc, SV_AOUT))
695 error = sockargs(&control, mp->msg_control,
696 mp->msg_controllen, MT_CONTROL);
699 #ifdef COMPAT_OLDSOCK
700 if (mp->msg_flags == MSG_COMPAT &&
701 SV_PROC_FLAG(td->td_proc, SV_AOUT)) {
704 M_PREPEND(control, sizeof(*cm), M_WAITOK);
705 cm = mtod(control, struct cmsghdr *);
706 cm->cmsg_len = control->m_len;
707 cm->cmsg_level = SOL_SOCKET;
708 cm->cmsg_type = SCM_RIGHTS;
715 error = kern_sendit(td, s, mp, flags, control, UIO_USERSPACE);
723 kern_sendit(struct thread *td, int s, struct msghdr *mp, int flags,
724 struct mbuf *control, enum uio_seg segflg)
730 cap_rights_t *rights;
732 struct uio *ktruio = NULL;
738 rights = &cap_send_rights;
739 if (mp->msg_name != NULL) {
740 AUDIT_ARG_SOCKADDR(td, AT_FDCWD, mp->msg_name);
741 rights = &cap_send_connect_rights;
743 error = getsock_cap(td, s, rights, &fp, NULL, NULL);
748 so = (struct socket *)fp->f_data;
751 if (mp->msg_name != NULL && KTRPOINT(td, KTR_STRUCT))
752 ktrsockaddr(mp->msg_name);
755 if (mp->msg_name != NULL) {
756 error = mac_socket_check_connect(td->td_ucred, so,
763 error = mac_socket_check_send(td->td_ucred, so);
770 auio.uio_iov = mp->msg_iov;
771 auio.uio_iovcnt = mp->msg_iovlen;
772 auio.uio_segflg = segflg;
773 auio.uio_rw = UIO_WRITE;
775 auio.uio_offset = 0; /* XXX */
778 for (i = 0; i < mp->msg_iovlen; i++, iov++) {
779 if ((auio.uio_resid += iov->iov_len) < 0) {
786 if (KTRPOINT(td, KTR_GENIO))
787 ktruio = cloneuio(&auio);
789 len = auio.uio_resid;
790 error = sosend(so, mp->msg_name, &auio, 0, control, flags, td);
792 if (auio.uio_resid != len && (error == ERESTART ||
793 error == EINTR || 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 sys_recvfrom(struct thread *td, struct recvfrom_args *uap)
1079 if (uap->fromlenaddr) {
1080 error = copyin(uap->fromlenaddr,
1081 &msg.msg_namelen, sizeof (msg.msg_namelen));
1085 msg.msg_namelen = 0;
1087 msg.msg_name = uap->from;
1088 msg.msg_iov = &aiov;
1090 aiov.iov_base = uap->buf;
1091 aiov.iov_len = uap->len;
1092 msg.msg_control = 0;
1093 msg.msg_flags = uap->flags;
1094 error = recvit(td, uap->s, &msg, uap->fromlenaddr);
1099 #ifdef COMPAT_OLDSOCK
1101 orecvfrom(struct thread *td, struct recvfrom_args *uap)
1104 uap->flags |= MSG_COMPAT;
1105 return (sys_recvfrom(td, uap));
1109 #ifdef COMPAT_OLDSOCK
1111 orecv(struct thread *td, struct orecv_args *uap)
1117 msg.msg_namelen = 0;
1118 msg.msg_iov = &aiov;
1120 aiov.iov_base = uap->buf;
1121 aiov.iov_len = uap->len;
1122 msg.msg_control = 0;
1123 msg.msg_flags = uap->flags;
1124 return (recvit(td, uap->s, &msg, NULL));
1128 * Old recvmsg. This code takes advantage of the fact that the old msghdr
1129 * overlays the new one, missing only the flags, and with the (old) access
1130 * rights where the control fields are now.
1133 orecvmsg(struct thread *td, struct orecvmsg_args *uap)
1139 error = copyin(uap->msg, &msg, sizeof (struct omsghdr));
1142 error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE);
1145 msg.msg_flags = uap->flags | MSG_COMPAT;
1147 error = recvit(td, uap->s, &msg, &uap->msg->msg_namelen);
1148 if (msg.msg_controllen && error == 0)
1149 error = copyout(&msg.msg_controllen,
1150 &uap->msg->msg_accrightslen, sizeof (int));
1157 sys_recvmsg(struct thread *td, struct recvmsg_args *uap)
1160 struct iovec *uiov, *iov;
1163 error = copyin(uap->msg, &msg, sizeof (msg));
1166 error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE);
1169 msg.msg_flags = uap->flags;
1170 #ifdef COMPAT_OLDSOCK
1171 if (SV_PROC_FLAG(td->td_proc, SV_AOUT))
1172 msg.msg_flags &= ~MSG_COMPAT;
1176 error = recvit(td, uap->s, &msg, NULL);
1179 error = copyout(&msg, uap->msg, sizeof(msg));
1186 sys_shutdown(struct thread *td, struct shutdown_args *uap)
1189 return (kern_shutdown(td, uap->s, uap->how));
1193 kern_shutdown(struct thread *td, int s, int how)
1200 error = getsock_cap(td, s, &cap_shutdown_rights,
1204 error = soshutdown(so, how);
1206 * Previous versions did not return ENOTCONN, but 0 in
1207 * case the socket was not connected. Some important
1208 * programs like syslogd up to r279016, 2015-02-19,
1209 * still depend on this behavior.
1211 if (error == ENOTCONN &&
1212 td->td_proc->p_osrel < P_OSREL_SHUTDOWN_ENOTCONN)
1220 sys_setsockopt(struct thread *td, struct setsockopt_args *uap)
1223 return (kern_setsockopt(td, uap->s, uap->level, uap->name,
1224 uap->val, UIO_USERSPACE, uap->valsize));
1228 kern_setsockopt(struct thread *td, int s, int level, int name, const void *val,
1229 enum uio_seg valseg, socklen_t valsize)
1233 struct sockopt sopt;
1236 if (val == NULL && valsize != 0)
1238 if ((int)valsize < 0)
1241 sopt.sopt_dir = SOPT_SET;
1242 sopt.sopt_level = level;
1243 sopt.sopt_name = name;
1244 sopt.sopt_val = __DECONST(void *, val);
1245 sopt.sopt_valsize = valsize;
1251 sopt.sopt_td = NULL;
1254 panic("kern_setsockopt called with bad valseg");
1258 error = getsock_cap(td, s, &cap_setsockopt_rights,
1262 error = sosetopt(so, &sopt);
1269 sys_getsockopt(struct thread *td, struct getsockopt_args *uap)
1275 error = copyin(uap->avalsize, &valsize, sizeof (valsize));
1280 error = kern_getsockopt(td, uap->s, uap->level, uap->name,
1281 uap->val, UIO_USERSPACE, &valsize);
1284 error = copyout(&valsize, uap->avalsize, sizeof (valsize));
1289 * Kernel version of getsockopt.
1290 * optval can be a userland or userspace. optlen is always a kernel pointer.
1293 kern_getsockopt(struct thread *td, int s, int level, int name, void *val,
1294 enum uio_seg valseg, socklen_t *valsize)
1298 struct sockopt sopt;
1303 if ((int)*valsize < 0)
1306 sopt.sopt_dir = SOPT_GET;
1307 sopt.sopt_level = level;
1308 sopt.sopt_name = name;
1309 sopt.sopt_val = val;
1310 sopt.sopt_valsize = (size_t)*valsize; /* checked non-negative above */
1316 sopt.sopt_td = NULL;
1319 panic("kern_getsockopt called with bad valseg");
1323 error = getsock_cap(td, s, &cap_getsockopt_rights,
1327 error = sogetopt(so, &sopt);
1328 *valsize = sopt.sopt_valsize;
1335 * getsockname1() - Get socket name.
1338 getsockname1(struct thread *td, struct getsockname_args *uap, int compat)
1340 struct sockaddr *sa;
1344 error = copyin(uap->alen, &len, sizeof(len));
1348 error = kern_getsockname(td, uap->fdes, &sa, &len);
1353 #ifdef COMPAT_OLDSOCK
1354 if (compat && SV_PROC_FLAG(td->td_proc, SV_AOUT))
1355 ((struct osockaddr *)sa)->sa_family = sa->sa_family;
1357 error = copyout(sa, uap->asa, (u_int)len);
1361 error = copyout(&len, uap->alen, sizeof(len));
1366 kern_getsockname(struct thread *td, int fd, struct sockaddr **sa,
1375 error = getsock_cap(td, fd, &cap_getsockname_rights,
1381 CURVNET_SET(so->so_vnet);
1382 error = (*so->so_proto->pr_usrreqs->pru_sockaddr)(so, sa);
1389 len = MIN(*alen, (*sa)->sa_len);
1392 if (KTRPOINT(td, KTR_STRUCT))
1397 if (error != 0 && *sa != NULL) {
1398 free(*sa, M_SONAME);
1405 sys_getsockname(struct thread *td, struct getsockname_args *uap)
1408 return (getsockname1(td, uap, 0));
1411 #ifdef COMPAT_OLDSOCK
1413 ogetsockname(struct thread *td, struct getsockname_args *uap)
1416 return (getsockname1(td, uap, 1));
1418 #endif /* COMPAT_OLDSOCK */
1421 * getpeername1() - Get name of peer for connected socket.
1424 getpeername1(struct thread *td, struct getpeername_args *uap, int compat)
1426 struct sockaddr *sa;
1430 error = copyin(uap->alen, &len, sizeof (len));
1434 error = kern_getpeername(td, uap->fdes, &sa, &len);
1439 #ifdef COMPAT_OLDSOCK
1440 if (compat && SV_PROC_FLAG(td->td_proc, SV_AOUT))
1441 ((struct osockaddr *)sa)->sa_family = sa->sa_family;
1443 error = copyout(sa, uap->asa, (u_int)len);
1447 error = copyout(&len, uap->alen, sizeof(len));
1452 kern_getpeername(struct thread *td, int fd, struct sockaddr **sa,
1461 error = getsock_cap(td, fd, &cap_getpeername_rights,
1466 if ((so->so_state & (SS_ISCONNECTED|SS_ISCONFIRMING)) == 0) {
1471 CURVNET_SET(so->so_vnet);
1472 error = (*so->so_proto->pr_usrreqs->pru_peeraddr)(so, sa);
1479 len = MIN(*alen, (*sa)->sa_len);
1482 if (KTRPOINT(td, KTR_STRUCT))
1486 if (error != 0 && *sa != NULL) {
1487 free(*sa, M_SONAME);
1496 sys_getpeername(struct thread *td, struct getpeername_args *uap)
1499 return (getpeername1(td, uap, 0));
1502 #ifdef COMPAT_OLDSOCK
1504 ogetpeername(struct thread *td, struct ogetpeername_args *uap)
1507 /* XXX uap should have type `getpeername_args *' to begin with. */
1508 return (getpeername1(td, (struct getpeername_args *)uap, 1));
1510 #endif /* COMPAT_OLDSOCK */
1513 sockargs(struct mbuf **mp, char *buf, socklen_t buflen, int type)
1515 struct sockaddr *sa;
1519 if (buflen > MLEN) {
1520 #ifdef COMPAT_OLDSOCK
1521 if (type == MT_SONAME && buflen <= 112 &&
1522 SV_CURPROC_FLAG(SV_AOUT))
1523 buflen = MLEN; /* unix domain compat. hack */
1526 if (buflen > MCLBYTES)
1529 m = m_get2(buflen, M_WAITOK, type, 0);
1531 error = copyin(buf, mtod(m, void *), buflen);
1536 if (type == MT_SONAME) {
1537 sa = mtod(m, struct sockaddr *);
1539 #if defined(COMPAT_OLDSOCK) && BYTE_ORDER != BIG_ENDIAN
1540 if (sa->sa_family == 0 && sa->sa_len < AF_MAX &&
1541 SV_CURPROC_FLAG(SV_AOUT))
1542 sa->sa_family = sa->sa_len;
1544 sa->sa_len = buflen;
1551 getsockaddr(struct sockaddr **namp, const struct sockaddr *uaddr, size_t len)
1553 struct sockaddr *sa;
1556 if (len > SOCK_MAXADDRLEN)
1557 return (ENAMETOOLONG);
1558 if (len < offsetof(struct sockaddr, sa_data[0]))
1560 sa = malloc(len, M_SONAME, M_WAITOK);
1561 error = copyin(uaddr, sa, len);
1565 #if defined(COMPAT_OLDSOCK) && BYTE_ORDER != BIG_ENDIAN
1566 if (sa->sa_family == 0 && sa->sa_len < AF_MAX &&
1567 SV_CURPROC_FLAG(SV_AOUT))
1568 sa->sa_family = sa->sa_len;
1577 * Dispose of externalized rights from an SCM_RIGHTS message. This function
1578 * should be used in error or truncation cases to avoid leaking file descriptors
1579 * into the recipient's (the current thread's) table.
1582 m_dispose_extcontrolm(struct mbuf *m)
1587 socklen_t clen, datalen;
1588 int error, fd, *fds, nfd;
1591 for (; m != NULL; m = m->m_next) {
1592 if (m->m_type != MT_EXTCONTROL)
1594 cm = mtod(m, struct cmsghdr *);
1597 if (clen < sizeof(*cm))
1598 panic("%s: truncated mbuf %p", __func__, m);
1599 datalen = CMSG_SPACE(cm->cmsg_len - CMSG_SPACE(0));
1601 panic("%s: truncated mbuf %p", __func__, m);
1603 if (cm->cmsg_level == SOL_SOCKET &&
1604 cm->cmsg_type == SCM_RIGHTS) {
1605 fds = (int *)CMSG_DATA(cm);
1606 nfd = (cm->cmsg_len - CMSG_SPACE(0)) /
1611 error = fget(td, fd, &cap_no_rights,
1614 fdclose(td, fp, fd);
1620 cm = (struct cmsghdr *)((uint8_t *)cm + datalen);
1622 m_chtype(m, MT_CONTROL);