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>
62 #include <sys/ktrace.h>
64 #ifdef COMPAT_FREEBSD32
65 #include <compat/freebsd32/freebsd32_util.h>
70 #include <security/audit/audit.h>
71 #include <security/mac/mac_framework.h>
73 static int sendit(struct thread *td, int s, struct msghdr *mp, int flags);
74 static int recvit(struct thread *td, int s, struct msghdr *mp, void *namelenp);
76 static int accept1(struct thread *td, int s, struct sockaddr *uname,
77 socklen_t *anamelen, int flags);
78 static int getsockname1(struct thread *td, struct getsockname_args *uap,
80 static int getpeername1(struct thread *td, struct getpeername_args *uap,
82 static int sockargs(struct mbuf **, char *, socklen_t, int);
85 * Convert a user file descriptor to a kernel file entry and check if required
86 * capability rights are present.
87 * If required copy of current set of capability rights is returned.
88 * A reference on the file entry is held upon returning.
91 getsock_cap(struct thread *td, int fd, cap_rights_t *rightsp,
92 struct file **fpp, u_int *fflagp, struct filecaps *havecapsp)
97 error = fget_cap(td, fd, rightsp, &fp, havecapsp);
100 if (fp->f_type != DTYPE_SOCKET) {
102 if (havecapsp != NULL)
103 filecaps_free(havecapsp);
107 *fflagp = fp->f_flag;
113 * System call interface to the socket abstraction.
115 #if defined(COMPAT_43)
116 #define COMPAT_OLDSOCK
120 sys_socket(struct thread *td, struct socket_args *uap)
123 return (kern_socket(td, uap->domain, uap->type, uap->protocol));
127 kern_socket(struct thread *td, int domain, int type, int protocol)
131 int fd, error, oflag, fflag;
133 AUDIT_ARG_SOCKET(domain, type, protocol);
137 if ((type & SOCK_CLOEXEC) != 0) {
138 type &= ~SOCK_CLOEXEC;
141 if ((type & SOCK_NONBLOCK) != 0) {
142 type &= ~SOCK_NONBLOCK;
147 error = mac_socket_check_create(td->td_ucred, domain, type, protocol);
151 error = falloc(td, &fp, &fd, oflag);
154 /* An extra reference on `fp' has been held for us by falloc(). */
155 error = socreate(domain, &so, type, protocol, td->td_ucred, td);
159 finit(fp, FREAD | FWRITE | fflag, DTYPE_SOCKET, so, &socketops);
160 if ((fflag & FNONBLOCK) != 0)
161 (void) fo_ioctl(fp, FIONBIO, &fflag, td->td_ucred, td);
162 td->td_retval[0] = fd;
169 sys_bind(struct thread *td, struct bind_args *uap)
174 error = getsockaddr(&sa, uap->name, uap->namelen);
176 error = kern_bindat(td, AT_FDCWD, uap->s, sa);
183 kern_bindat(struct thread *td, int dirfd, int fd, struct sockaddr *sa)
189 #ifdef CAPABILITY_MODE
190 if (IN_CAPABILITY_MODE(td) && (dirfd == AT_FDCWD))
195 AUDIT_ARG_SOCKADDR(td, dirfd, sa);
196 error = getsock_cap(td, fd, &cap_bind_rights,
202 if (KTRPOINT(td, KTR_STRUCT))
206 error = mac_socket_check_bind(td->td_ucred, so, sa);
209 if (dirfd == AT_FDCWD)
210 error = sobind(so, sa, td);
212 error = sobindat(dirfd, so, sa, td);
221 sys_bindat(struct thread *td, struct bindat_args *uap)
226 error = getsockaddr(&sa, uap->name, uap->namelen);
228 error = kern_bindat(td, uap->fd, uap->s, sa);
235 sys_listen(struct thread *td, struct listen_args *uap)
238 return (kern_listen(td, uap->s, uap->backlog));
242 kern_listen(struct thread *td, int s, int backlog)
249 error = getsock_cap(td, s, &cap_listen_rights,
254 error = mac_socket_check_listen(td->td_ucred, so);
257 error = solisten(so, backlog, td);
267 accept1(td, s, uname, anamelen, flags)
270 struct sockaddr *uname;
274 struct sockaddr *name;
280 return (kern_accept4(td, s, NULL, NULL, flags, NULL));
282 error = copyin(anamelen, &namelen, sizeof (namelen));
286 error = kern_accept4(td, s, &name, &namelen, flags, &fp);
291 if (error == 0 && uname != NULL) {
292 #ifdef COMPAT_OLDSOCK
293 if (flags & ACCEPT4_COMPAT)
294 ((struct osockaddr *)name)->sa_family =
297 error = copyout(name, uname, namelen);
300 error = copyout(&namelen, anamelen,
303 fdclose(td, fp, td->td_retval[0]);
305 free(name, M_SONAME);
310 kern_accept(struct thread *td, int s, struct sockaddr **name,
311 socklen_t *namelen, struct file **fp)
313 return (kern_accept4(td, s, name, namelen, ACCEPT4_INHERIT, fp));
317 kern_accept4(struct thread *td, int s, struct sockaddr **name,
318 socklen_t *namelen, int flags, struct file **fp)
320 struct file *headfp, *nfp = NULL;
321 struct sockaddr *sa = NULL;
322 struct socket *head, *so;
323 struct filecaps fcaps;
332 error = getsock_cap(td, s, &cap_accept_rights,
333 &headfp, &fflag, &fcaps);
336 head = headfp->f_data;
337 if ((head->so_options & SO_ACCEPTCONN) == 0) {
342 error = mac_socket_check_accept(td->td_ucred, head);
346 error = falloc_caps(td, &nfp, &fd,
347 (flags & SOCK_CLOEXEC) ? O_CLOEXEC : 0, &fcaps);
351 if (!SOLISTENING(head)) {
357 error = solisten_dequeue(head, &so, flags);
361 /* An extra reference on `nfp' has been held for us by falloc(). */
362 td->td_retval[0] = fd;
364 /* Connection has been removed from the listen queue. */
365 KNOTE_UNLOCKED(&head->so_rdsel.si_note, 0);
367 if (flags & ACCEPT4_INHERIT) {
368 pgid = fgetown(&head->so_sigio);
370 fsetown(pgid, &so->so_sigio);
372 fflag &= ~(FNONBLOCK | FASYNC);
373 if (flags & SOCK_NONBLOCK)
377 finit(nfp, fflag, DTYPE_SOCKET, so, &socketops);
378 /* Sync socket nonblocking/async state with file flags */
379 tmp = fflag & FNONBLOCK;
380 (void) fo_ioctl(nfp, FIONBIO, &tmp, td->td_ucred, td);
381 tmp = fflag & FASYNC;
382 (void) fo_ioctl(nfp, FIOASYNC, &tmp, td->td_ucred, td);
383 error = soaccept(so, &sa);
391 AUDIT_ARG_SOCKADDR(td, AT_FDCWD, sa);
393 /* check sa_len before it is destroyed */
394 if (*namelen > sa->sa_len)
395 *namelen = sa->sa_len;
397 if (KTRPOINT(td, KTR_STRUCT))
407 * close the new descriptor, assuming someone hasn't ripped it
411 fdclose(td, nfp, fd);
414 * Release explicitly held references before returning. We return
415 * a reference on nfp to the caller on success if they request it.
419 filecaps_free(&fcaps);
436 struct accept_args *uap;
439 return (accept1(td, uap->s, uap->name, uap->anamelen, ACCEPT4_INHERIT));
445 struct accept4_args *uap;
448 if (uap->flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK))
451 return (accept1(td, uap->s, uap->name, uap->anamelen, uap->flags));
454 #ifdef COMPAT_OLDSOCK
458 struct accept_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)
485 int error, interrupted = 0;
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 if (dirfd == AT_FDCWD)
513 error = soconnect(so, sa, td);
515 error = soconnectat(dirfd, so, sa, td);
518 if ((so->so_state & SS_NBIO) && (so->so_state & SS_ISCONNECTING)) {
523 while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) {
524 error = msleep(&so->so_timeo, &so->so_lock, PSOCK | PCATCH,
527 if (error == EINTR || error == ERESTART)
533 error = so->so_error;
539 so->so_state &= ~SS_ISCONNECTING;
540 if (error == ERESTART)
548 sys_connectat(struct thread *td, struct connectat_args *uap)
553 error = getsockaddr(&sa, uap->name, uap->namelen);
555 error = kern_connectat(td, uap->fd, uap->s, sa);
562 kern_socketpair(struct thread *td, int domain, int type, int protocol,
565 struct file *fp1, *fp2;
566 struct socket *so1, *so2;
567 int fd, error, oflag, fflag;
569 AUDIT_ARG_SOCKET(domain, type, protocol);
573 if ((type & SOCK_CLOEXEC) != 0) {
574 type &= ~SOCK_CLOEXEC;
577 if ((type & SOCK_NONBLOCK) != 0) {
578 type &= ~SOCK_NONBLOCK;
582 /* We might want to have a separate check for socket pairs. */
583 error = mac_socket_check_create(td->td_ucred, domain, type,
588 error = socreate(domain, &so1, type, protocol, td->td_ucred, td);
591 error = socreate(domain, &so2, type, protocol, td->td_ucred, td);
594 /* On success extra reference to `fp1' and 'fp2' is set by falloc. */
595 error = falloc(td, &fp1, &fd, oflag);
599 fp1->f_data = so1; /* so1 already has ref count */
600 error = falloc(td, &fp2, &fd, oflag);
603 fp2->f_data = so2; /* so2 already has ref count */
605 error = soconnect2(so1, so2);
608 if (type == SOCK_DGRAM) {
610 * Datagram socket connection is asymmetric.
612 error = soconnect2(so2, so1);
616 finit(fp1, FREAD | FWRITE | fflag, DTYPE_SOCKET, fp1->f_data,
618 finit(fp2, FREAD | FWRITE | fflag, DTYPE_SOCKET, fp2->f_data,
620 if ((fflag & FNONBLOCK) != 0) {
621 (void) fo_ioctl(fp1, FIONBIO, &fflag, td->td_ucred, td);
622 (void) fo_ioctl(fp2, FIONBIO, &fflag, td->td_ucred, td);
628 fdclose(td, fp2, rsv[1]);
631 fdclose(td, fp1, rsv[0]);
643 sys_socketpair(struct thread *td, struct socketpair_args *uap)
647 error = kern_socketpair(td, uap->domain, uap->type,
651 error = copyout(sv, uap->rsv, 2 * sizeof(int));
653 (void)kern_close(td, sv[0]);
654 (void)kern_close(td, sv[1]);
660 sendit(struct thread *td, int s, struct msghdr *mp, int flags)
662 struct mbuf *control;
666 #ifdef CAPABILITY_MODE
667 if (IN_CAPABILITY_MODE(td) && (mp->msg_name != NULL))
671 if (mp->msg_name != NULL) {
672 error = getsockaddr(&to, mp->msg_name, mp->msg_namelen);
682 if (mp->msg_control) {
683 if (mp->msg_controllen < sizeof(struct cmsghdr)
684 #ifdef COMPAT_OLDSOCK
685 && mp->msg_flags != MSG_COMPAT
691 error = sockargs(&control, mp->msg_control,
692 mp->msg_controllen, MT_CONTROL);
695 #ifdef COMPAT_OLDSOCK
696 if (mp->msg_flags == MSG_COMPAT) {
699 M_PREPEND(control, sizeof(*cm), M_WAITOK);
700 cm = mtod(control, struct cmsghdr *);
701 cm->cmsg_len = control->m_len;
702 cm->cmsg_level = SOL_SOCKET;
703 cm->cmsg_type = SCM_RIGHTS;
710 error = kern_sendit(td, s, mp, flags, control, UIO_USERSPACE);
718 kern_sendit(struct thread *td, int s, struct msghdr *mp, int flags,
719 struct mbuf *control, enum uio_seg segflg)
727 struct uio *ktruio = NULL;
733 cap_rights_init(&rights, CAP_SEND);
734 if (mp->msg_name != NULL) {
735 AUDIT_ARG_SOCKADDR(td, AT_FDCWD, mp->msg_name);
736 cap_rights_set(&rights, CAP_CONNECT);
738 error = getsock_cap(td, s, &rights, &fp, NULL, NULL);
743 so = (struct socket *)fp->f_data;
746 if (mp->msg_name != NULL && KTRPOINT(td, KTR_STRUCT))
747 ktrsockaddr(mp->msg_name);
750 if (mp->msg_name != NULL) {
751 error = mac_socket_check_connect(td->td_ucred, so,
758 error = mac_socket_check_send(td->td_ucred, so);
765 auio.uio_iov = mp->msg_iov;
766 auio.uio_iovcnt = mp->msg_iovlen;
767 auio.uio_segflg = segflg;
768 auio.uio_rw = UIO_WRITE;
770 auio.uio_offset = 0; /* XXX */
773 for (i = 0; i < mp->msg_iovlen; i++, iov++) {
774 if ((auio.uio_resid += iov->iov_len) < 0) {
781 if (KTRPOINT(td, KTR_GENIO))
782 ktruio = cloneuio(&auio);
784 len = auio.uio_resid;
785 error = sosend(so, mp->msg_name, &auio, 0, control, flags, td);
787 if (auio.uio_resid != len && (error == ERESTART ||
788 error == EINTR || error == EWOULDBLOCK))
790 /* Generation of SIGPIPE can be controlled per socket */
791 if (error == EPIPE && !(so->so_options & SO_NOSIGPIPE) &&
792 !(flags & MSG_NOSIGNAL)) {
793 PROC_LOCK(td->td_proc);
794 tdsignal(td, SIGPIPE);
795 PROC_UNLOCK(td->td_proc);
799 td->td_retval[0] = len - auio.uio_resid;
801 if (ktruio != NULL) {
802 ktruio->uio_resid = td->td_retval[0];
803 ktrgenio(s, UIO_WRITE, ktruio, error);
812 sys_sendto(struct thread *td, struct sendto_args *uap)
817 msg.msg_name = uap->to;
818 msg.msg_namelen = uap->tolen;
822 #ifdef COMPAT_OLDSOCK
825 aiov.iov_base = uap->buf;
826 aiov.iov_len = uap->len;
827 return (sendit(td, uap->s, &msg, uap->flags));
830 #ifdef COMPAT_OLDSOCK
832 osend(struct thread *td, struct osend_args *uap)
841 aiov.iov_base = uap->buf;
842 aiov.iov_len = uap->len;
845 return (sendit(td, uap->s, &msg, uap->flags));
849 osendmsg(struct thread *td, struct osendmsg_args *uap)
855 error = copyin(uap->msg, &msg, sizeof (struct omsghdr));
858 error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE);
862 msg.msg_flags = MSG_COMPAT;
863 error = sendit(td, uap->s, &msg, uap->flags);
870 sys_sendmsg(struct thread *td, struct sendmsg_args *uap)
876 error = copyin(uap->msg, &msg, sizeof (msg));
879 error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE);
883 #ifdef COMPAT_OLDSOCK
886 error = sendit(td, uap->s, &msg, uap->flags);
892 kern_recvit(struct thread *td, int s, struct msghdr *mp, enum uio_seg fromseg,
893 struct mbuf **controlp)
897 struct mbuf *m, *control = NULL;
901 struct sockaddr *fromsa = NULL;
903 struct uio *ktruio = NULL;
908 if (controlp != NULL)
912 error = getsock_cap(td, s, &cap_recv_rights,
919 error = mac_socket_check_receive(td->td_ucred, so);
926 auio.uio_iov = mp->msg_iov;
927 auio.uio_iovcnt = mp->msg_iovlen;
928 auio.uio_segflg = UIO_USERSPACE;
929 auio.uio_rw = UIO_READ;
931 auio.uio_offset = 0; /* XXX */
934 for (i = 0; i < mp->msg_iovlen; i++, iov++) {
935 if ((auio.uio_resid += iov->iov_len) < 0) {
941 if (KTRPOINT(td, KTR_GENIO))
942 ktruio = cloneuio(&auio);
944 len = auio.uio_resid;
945 error = soreceive(so, &fromsa, &auio, NULL,
946 (mp->msg_control || controlp) ? &control : NULL,
949 if (auio.uio_resid != len && (error == ERESTART ||
950 error == EINTR || error == EWOULDBLOCK))
954 AUDIT_ARG_SOCKADDR(td, AT_FDCWD, fromsa);
956 if (ktruio != NULL) {
957 ktruio->uio_resid = len - auio.uio_resid;
958 ktrgenio(s, UIO_READ, ktruio, error);
963 td->td_retval[0] = len - auio.uio_resid;
965 len = mp->msg_namelen;
966 if (len <= 0 || fromsa == NULL)
969 /* save sa_len before it is destroyed by MSG_COMPAT */
970 len = MIN(len, fromsa->sa_len);
971 #ifdef COMPAT_OLDSOCK
972 if (mp->msg_flags & MSG_COMPAT)
973 ((struct osockaddr *)fromsa)->sa_family =
976 if (fromseg == UIO_USERSPACE) {
977 error = copyout(fromsa, mp->msg_name,
982 bcopy(fromsa, mp->msg_name, len);
984 mp->msg_namelen = len;
986 if (mp->msg_control && controlp == NULL) {
987 #ifdef COMPAT_OLDSOCK
989 * We assume that old recvmsg calls won't receive access
990 * rights and other control info, esp. as control info
991 * is always optional and those options didn't exist in 4.3.
992 * If we receive rights, trim the cmsghdr; anything else
995 if (control && mp->msg_flags & MSG_COMPAT) {
996 if (mtod(control, struct cmsghdr *)->cmsg_level !=
998 mtod(control, struct cmsghdr *)->cmsg_type !=
1000 mp->msg_controllen = 0;
1003 control->m_len -= sizeof (struct cmsghdr);
1004 control->m_data += sizeof (struct cmsghdr);
1007 len = mp->msg_controllen;
1009 mp->msg_controllen = 0;
1010 ctlbuf = mp->msg_control;
1012 while (m && len > 0) {
1013 unsigned int tocopy;
1015 if (len >= m->m_len)
1018 mp->msg_flags |= MSG_CTRUNC;
1022 if ((error = copyout(mtod(m, caddr_t),
1023 ctlbuf, tocopy)) != 0)
1030 mp->msg_controllen = ctlbuf - (caddr_t)mp->msg_control;
1035 if (fromsa && KTRPOINT(td, KTR_STRUCT))
1036 ktrsockaddr(fromsa);
1038 free(fromsa, M_SONAME);
1040 if (error == 0 && controlp != NULL)
1041 *controlp = control;
1049 recvit(struct thread *td, int s, struct msghdr *mp, void *namelenp)
1053 error = kern_recvit(td, s, mp, UIO_USERSPACE, NULL);
1056 if (namelenp != NULL) {
1057 error = copyout(&mp->msg_namelen, namelenp, sizeof (socklen_t));
1058 #ifdef COMPAT_OLDSOCK
1059 if (mp->msg_flags & MSG_COMPAT)
1060 error = 0; /* old recvfrom didn't check */
1067 sys_recvfrom(struct thread *td, struct recvfrom_args *uap)
1073 if (uap->fromlenaddr) {
1074 error = copyin(uap->fromlenaddr,
1075 &msg.msg_namelen, sizeof (msg.msg_namelen));
1079 msg.msg_namelen = 0;
1081 msg.msg_name = uap->from;
1082 msg.msg_iov = &aiov;
1084 aiov.iov_base = uap->buf;
1085 aiov.iov_len = uap->len;
1086 msg.msg_control = 0;
1087 msg.msg_flags = uap->flags;
1088 error = recvit(td, uap->s, &msg, uap->fromlenaddr);
1093 #ifdef COMPAT_OLDSOCK
1095 orecvfrom(struct thread *td, struct recvfrom_args *uap)
1098 uap->flags |= MSG_COMPAT;
1099 return (sys_recvfrom(td, uap));
1103 #ifdef COMPAT_OLDSOCK
1105 orecv(struct thread *td, struct orecv_args *uap)
1111 msg.msg_namelen = 0;
1112 msg.msg_iov = &aiov;
1114 aiov.iov_base = uap->buf;
1115 aiov.iov_len = uap->len;
1116 msg.msg_control = 0;
1117 msg.msg_flags = uap->flags;
1118 return (recvit(td, uap->s, &msg, NULL));
1122 * Old recvmsg. This code takes advantage of the fact that the old msghdr
1123 * overlays the new one, missing only the flags, and with the (old) access
1124 * rights where the control fields are now.
1127 orecvmsg(struct thread *td, struct orecvmsg_args *uap)
1133 error = copyin(uap->msg, &msg, sizeof (struct omsghdr));
1136 error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE);
1139 msg.msg_flags = uap->flags | MSG_COMPAT;
1141 error = recvit(td, uap->s, &msg, &uap->msg->msg_namelen);
1142 if (msg.msg_controllen && error == 0)
1143 error = copyout(&msg.msg_controllen,
1144 &uap->msg->msg_accrightslen, sizeof (int));
1151 sys_recvmsg(struct thread *td, struct recvmsg_args *uap)
1154 struct iovec *uiov, *iov;
1157 error = copyin(uap->msg, &msg, sizeof (msg));
1160 error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE);
1163 msg.msg_flags = uap->flags;
1164 #ifdef COMPAT_OLDSOCK
1165 msg.msg_flags &= ~MSG_COMPAT;
1169 error = recvit(td, uap->s, &msg, NULL);
1172 error = copyout(&msg, uap->msg, sizeof(msg));
1179 sys_shutdown(struct thread *td, struct shutdown_args *uap)
1182 return (kern_shutdown(td, uap->s, uap->how));
1186 kern_shutdown(struct thread *td, int s, int how)
1193 error = getsock_cap(td, s, &cap_shutdown_rights,
1197 error = soshutdown(so, how);
1199 * Previous versions did not return ENOTCONN, but 0 in
1200 * case the socket was not connected. Some important
1201 * programs like syslogd up to r279016, 2015-02-19,
1202 * still depend on this behavior.
1204 if (error == ENOTCONN &&
1205 td->td_proc->p_osrel < P_OSREL_SHUTDOWN_ENOTCONN)
1213 sys_setsockopt(struct thread *td, struct setsockopt_args *uap)
1216 return (kern_setsockopt(td, uap->s, uap->level, uap->name,
1217 uap->val, UIO_USERSPACE, uap->valsize));
1221 kern_setsockopt(struct thread *td, int s, int level, int name, void *val,
1222 enum uio_seg valseg, socklen_t valsize)
1226 struct sockopt sopt;
1229 if (val == NULL && valsize != 0)
1231 if ((int)valsize < 0)
1234 sopt.sopt_dir = SOPT_SET;
1235 sopt.sopt_level = level;
1236 sopt.sopt_name = name;
1237 sopt.sopt_val = val;
1238 sopt.sopt_valsize = valsize;
1244 sopt.sopt_td = NULL;
1247 panic("kern_setsockopt called with bad valseg");
1251 error = getsock_cap(td, s, &cap_setsockopt_rights,
1255 error = sosetopt(so, &sopt);
1262 sys_getsockopt(struct thread *td, struct getsockopt_args *uap)
1268 error = copyin(uap->avalsize, &valsize, sizeof (valsize));
1273 error = kern_getsockopt(td, uap->s, uap->level, uap->name,
1274 uap->val, UIO_USERSPACE, &valsize);
1277 error = copyout(&valsize, uap->avalsize, sizeof (valsize));
1282 * Kernel version of getsockopt.
1283 * optval can be a userland or userspace. optlen is always a kernel pointer.
1286 kern_getsockopt(struct thread *td, int s, int level, int name, void *val,
1287 enum uio_seg valseg, socklen_t *valsize)
1291 struct sockopt sopt;
1296 if ((int)*valsize < 0)
1299 sopt.sopt_dir = SOPT_GET;
1300 sopt.sopt_level = level;
1301 sopt.sopt_name = name;
1302 sopt.sopt_val = val;
1303 sopt.sopt_valsize = (size_t)*valsize; /* checked non-negative above */
1309 sopt.sopt_td = NULL;
1312 panic("kern_getsockopt called with bad valseg");
1316 error = getsock_cap(td, s, &cap_getsockopt_rights,
1320 error = sogetopt(so, &sopt);
1321 *valsize = sopt.sopt_valsize;
1328 * getsockname1() - Get socket name.
1331 getsockname1(struct thread *td, struct getsockname_args *uap, int compat)
1333 struct sockaddr *sa;
1337 error = copyin(uap->alen, &len, sizeof(len));
1341 error = kern_getsockname(td, uap->fdes, &sa, &len);
1346 #ifdef COMPAT_OLDSOCK
1348 ((struct osockaddr *)sa)->sa_family = sa->sa_family;
1350 error = copyout(sa, uap->asa, (u_int)len);
1354 error = copyout(&len, uap->alen, sizeof(len));
1359 kern_getsockname(struct thread *td, int fd, struct sockaddr **sa,
1368 error = getsock_cap(td, fd, &cap_getsockname_rights,
1374 CURVNET_SET(so->so_vnet);
1375 error = (*so->so_proto->pr_usrreqs->pru_sockaddr)(so, sa);
1382 len = MIN(*alen, (*sa)->sa_len);
1385 if (KTRPOINT(td, KTR_STRUCT))
1390 if (error != 0 && *sa != NULL) {
1391 free(*sa, M_SONAME);
1398 sys_getsockname(struct thread *td, struct getsockname_args *uap)
1401 return (getsockname1(td, uap, 0));
1404 #ifdef COMPAT_OLDSOCK
1406 ogetsockname(struct thread *td, struct getsockname_args *uap)
1409 return (getsockname1(td, uap, 1));
1411 #endif /* COMPAT_OLDSOCK */
1414 * getpeername1() - Get name of peer for connected socket.
1417 getpeername1(struct thread *td, struct getpeername_args *uap, int compat)
1419 struct sockaddr *sa;
1423 error = copyin(uap->alen, &len, sizeof (len));
1427 error = kern_getpeername(td, uap->fdes, &sa, &len);
1432 #ifdef COMPAT_OLDSOCK
1434 ((struct osockaddr *)sa)->sa_family = sa->sa_family;
1436 error = copyout(sa, uap->asa, (u_int)len);
1440 error = copyout(&len, uap->alen, sizeof(len));
1445 kern_getpeername(struct thread *td, int fd, struct sockaddr **sa,
1454 error = getsock_cap(td, fd, &cap_getpeername_rights,
1459 if ((so->so_state & (SS_ISCONNECTED|SS_ISCONFIRMING)) == 0) {
1464 CURVNET_SET(so->so_vnet);
1465 error = (*so->so_proto->pr_usrreqs->pru_peeraddr)(so, sa);
1472 len = MIN(*alen, (*sa)->sa_len);
1475 if (KTRPOINT(td, KTR_STRUCT))
1479 if (error != 0 && *sa != NULL) {
1480 free(*sa, M_SONAME);
1489 sys_getpeername(struct thread *td, struct getpeername_args *uap)
1492 return (getpeername1(td, uap, 0));
1495 #ifdef COMPAT_OLDSOCK
1497 ogetpeername(struct thread *td, struct ogetpeername_args *uap)
1500 /* XXX uap should have type `getpeername_args *' to begin with. */
1501 return (getpeername1(td, (struct getpeername_args *)uap, 1));
1503 #endif /* COMPAT_OLDSOCK */
1506 sockargs(struct mbuf **mp, char *buf, socklen_t buflen, int type)
1508 struct sockaddr *sa;
1512 if (buflen > MLEN) {
1513 #ifdef COMPAT_OLDSOCK
1514 if (type == MT_SONAME && buflen <= 112)
1515 buflen = MLEN; /* unix domain compat. hack */
1518 if (buflen > MCLBYTES)
1521 m = m_get2(buflen, M_WAITOK, type, 0);
1523 error = copyin(buf, mtod(m, void *), buflen);
1528 if (type == MT_SONAME) {
1529 sa = mtod(m, struct sockaddr *);
1531 #if defined(COMPAT_OLDSOCK) && BYTE_ORDER != BIG_ENDIAN
1532 if (sa->sa_family == 0 && sa->sa_len < AF_MAX)
1533 sa->sa_family = sa->sa_len;
1535 sa->sa_len = buflen;
1542 getsockaddr(struct sockaddr **namp, caddr_t uaddr, size_t len)
1544 struct sockaddr *sa;
1547 if (len > SOCK_MAXADDRLEN)
1548 return (ENAMETOOLONG);
1549 if (len < offsetof(struct sockaddr, sa_data[0]))
1551 sa = malloc(len, M_SONAME, M_WAITOK);
1552 error = copyin(uaddr, sa, len);
1556 #if defined(COMPAT_OLDSOCK) && BYTE_ORDER != BIG_ENDIAN
1557 if (sa->sa_family == 0 && sa->sa_len < AF_MAX)
1558 sa->sa_family = sa->sa_len;