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
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_compat.h"
41 #include "opt_ktrace.h"
43 #include <sys/param.h>
44 #include <sys/systm.h>
45 #include <sys/capsicum.h>
46 #include <sys/kernel.h>
48 #include <sys/mutex.h>
49 #include <sys/sysproto.h>
50 #include <sys/malloc.h>
51 #include <sys/filedesc.h>
53 #include <sys/filio.h>
56 #include <sys/protosw.h>
57 #include <sys/rwlock.h>
58 #include <sys/socket.h>
59 #include <sys/socketvar.h>
60 #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)
191 AUDIT_ARG_SOCKADDR(td, dirfd, sa);
192 error = getsock_cap(td, fd, cap_rights_init(&rights, CAP_BIND),
198 if (KTRPOINT(td, KTR_STRUCT))
202 error = mac_socket_check_bind(td->td_ucred, so, sa);
205 if (dirfd == AT_FDCWD)
206 error = sobind(so, sa, td);
208 error = sobindat(dirfd, so, sa, td);
217 sys_bindat(struct thread *td, struct bindat_args *uap)
222 error = getsockaddr(&sa, uap->name, uap->namelen);
224 error = kern_bindat(td, uap->fd, uap->s, sa);
231 sys_listen(struct thread *td, struct listen_args *uap)
234 return (kern_listen(td, uap->s, uap->backlog));
238 kern_listen(struct thread *td, int s, int backlog)
246 error = getsock_cap(td, s, cap_rights_init(&rights, CAP_LISTEN),
251 error = mac_socket_check_listen(td->td_ucred, so);
254 error = solisten(so, backlog, td);
264 accept1(td, s, uname, anamelen, flags)
267 struct sockaddr *uname;
271 struct sockaddr *name;
277 return (kern_accept4(td, s, NULL, NULL, flags, NULL));
279 error = copyin(anamelen, &namelen, sizeof (namelen));
283 error = kern_accept4(td, s, &name, &namelen, flags, &fp);
288 if (error == 0 && uname != NULL) {
289 #ifdef COMPAT_OLDSOCK
290 if (flags & ACCEPT4_COMPAT)
291 ((struct osockaddr *)name)->sa_family =
294 error = copyout(name, uname, namelen);
297 error = copyout(&namelen, anamelen,
300 fdclose(td, fp, td->td_retval[0]);
302 free(name, M_SONAME);
307 kern_accept(struct thread *td, int s, struct sockaddr **name,
308 socklen_t *namelen, struct file **fp)
310 return (kern_accept4(td, s, name, namelen, ACCEPT4_INHERIT, fp));
314 kern_accept4(struct thread *td, int s, struct sockaddr **name,
315 socklen_t *namelen, int flags, struct file **fp)
317 struct file *headfp, *nfp = NULL;
318 struct sockaddr *sa = NULL;
319 struct socket *head, *so;
320 struct filecaps fcaps;
330 error = getsock_cap(td, s, cap_rights_init(&rights, CAP_ACCEPT),
331 &headfp, &fflag, &fcaps);
334 head = headfp->f_data;
335 if ((head->so_options & SO_ACCEPTCONN) == 0) {
340 error = mac_socket_check_accept(td->td_ucred, head);
344 error = falloc_caps(td, &nfp, &fd,
345 (flags & SOCK_CLOEXEC) ? O_CLOEXEC : 0, &fcaps);
349 if (!SOLISTENING(head)) {
355 error = solisten_dequeue(head, &so, flags);
359 /* An extra reference on `nfp' has been held for us by falloc(). */
360 td->td_retval[0] = fd;
362 /* Connection has been removed from the listen queue. */
363 KNOTE_UNLOCKED(&head->so_rdsel.si_note, 0);
365 if (flags & ACCEPT4_INHERIT) {
366 pgid = fgetown(&head->so_sigio);
368 fsetown(pgid, &so->so_sigio);
370 fflag &= ~(FNONBLOCK | FASYNC);
371 if (flags & SOCK_NONBLOCK)
375 finit(nfp, fflag, DTYPE_SOCKET, so, &socketops);
376 /* Sync socket nonblocking/async state with file flags */
377 tmp = fflag & FNONBLOCK;
378 (void) fo_ioctl(nfp, FIONBIO, &tmp, td->td_ucred, td);
379 tmp = fflag & FASYNC;
380 (void) fo_ioctl(nfp, FIOASYNC, &tmp, td->td_ucred, td);
381 error = soaccept(so, &sa);
389 AUDIT_ARG_SOCKADDR(td, AT_FDCWD, sa);
391 /* check sa_len before it is destroyed */
392 if (*namelen > sa->sa_len)
393 *namelen = sa->sa_len;
395 if (KTRPOINT(td, KTR_STRUCT))
405 * close the new descriptor, assuming someone hasn't ripped it
409 fdclose(td, nfp, fd);
412 * Release explicitly held references before returning. We return
413 * a reference on nfp to the caller on success if they request it.
417 filecaps_free(&fcaps);
434 struct accept_args *uap;
437 return (accept1(td, uap->s, uap->name, uap->anamelen, ACCEPT4_INHERIT));
443 struct accept4_args *uap;
446 if (uap->flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK))
449 return (accept1(td, uap->s, uap->name, uap->anamelen, uap->flags));
452 #ifdef COMPAT_OLDSOCK
456 struct accept_args *uap;
459 return (accept1(td, uap->s, uap->name, uap->anamelen,
460 ACCEPT4_INHERIT | ACCEPT4_COMPAT));
462 #endif /* COMPAT_OLDSOCK */
465 sys_connect(struct thread *td, struct connect_args *uap)
470 error = getsockaddr(&sa, uap->name, uap->namelen);
472 error = kern_connectat(td, AT_FDCWD, uap->s, sa);
479 kern_connectat(struct thread *td, int dirfd, int fd, struct sockaddr *sa)
484 int error, interrupted = 0;
487 AUDIT_ARG_SOCKADDR(td, dirfd, sa);
488 error = getsock_cap(td, fd, cap_rights_init(&rights, CAP_CONNECT),
493 if (so->so_state & SS_ISCONNECTING) {
498 if (KTRPOINT(td, KTR_STRUCT))
502 error = mac_socket_check_connect(td->td_ucred, so, sa);
506 if (dirfd == AT_FDCWD)
507 error = soconnect(so, sa, td);
509 error = soconnectat(dirfd, so, sa, td);
512 if ((so->so_state & SS_NBIO) && (so->so_state & SS_ISCONNECTING)) {
517 while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) {
518 error = msleep(&so->so_timeo, &so->so_lock, PSOCK | PCATCH,
521 if (error == EINTR || error == ERESTART)
527 error = so->so_error;
533 so->so_state &= ~SS_ISCONNECTING;
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);
610 finit(fp1, FREAD | FWRITE | fflag, DTYPE_SOCKET, fp1->f_data,
612 finit(fp2, FREAD | FWRITE | fflag, DTYPE_SOCKET, fp2->f_data,
614 if ((fflag & FNONBLOCK) != 0) {
615 (void) fo_ioctl(fp1, FIONBIO, &fflag, td->td_ucred, td);
616 (void) fo_ioctl(fp2, FIONBIO, &fflag, td->td_ucred, td);
622 fdclose(td, fp2, rsv[1]);
625 fdclose(td, fp1, rsv[0]);
637 sys_socketpair(struct thread *td, struct socketpair_args *uap)
641 error = kern_socketpair(td, uap->domain, uap->type,
645 error = copyout(sv, uap->rsv, 2 * sizeof(int));
647 (void)kern_close(td, sv[0]);
648 (void)kern_close(td, sv[1]);
654 sendit(struct thread *td, int s, struct msghdr *mp, int flags)
656 struct mbuf *control;
660 #ifdef CAPABILITY_MODE
661 if (IN_CAPABILITY_MODE(td) && (mp->msg_name != NULL))
665 if (mp->msg_name != NULL) {
666 error = getsockaddr(&to, mp->msg_name, mp->msg_namelen);
676 if (mp->msg_control) {
677 if (mp->msg_controllen < sizeof(struct cmsghdr)
678 #ifdef COMPAT_OLDSOCK
679 && mp->msg_flags != MSG_COMPAT
685 error = sockargs(&control, mp->msg_control,
686 mp->msg_controllen, MT_CONTROL);
689 #ifdef COMPAT_OLDSOCK
690 if (mp->msg_flags == MSG_COMPAT) {
693 M_PREPEND(control, sizeof(*cm), M_WAITOK);
694 cm = mtod(control, struct cmsghdr *);
695 cm->cmsg_len = control->m_len;
696 cm->cmsg_level = SOL_SOCKET;
697 cm->cmsg_type = SCM_RIGHTS;
704 error = kern_sendit(td, s, mp, flags, control, UIO_USERSPACE);
712 kern_sendit(struct thread *td, int s, struct msghdr *mp, int flags,
713 struct mbuf *control, enum uio_seg segflg)
721 struct uio *ktruio = NULL;
727 cap_rights_init(&rights, CAP_SEND);
728 if (mp->msg_name != NULL) {
729 AUDIT_ARG_SOCKADDR(td, AT_FDCWD, mp->msg_name);
730 cap_rights_set(&rights, CAP_CONNECT);
732 error = getsock_cap(td, s, &rights, &fp, NULL, NULL);
737 so = (struct socket *)fp->f_data;
740 if (mp->msg_name != NULL && KTRPOINT(td, KTR_STRUCT))
741 ktrsockaddr(mp->msg_name);
744 if (mp->msg_name != NULL) {
745 error = mac_socket_check_connect(td->td_ucred, so,
752 error = mac_socket_check_send(td->td_ucred, so);
759 auio.uio_iov = mp->msg_iov;
760 auio.uio_iovcnt = mp->msg_iovlen;
761 auio.uio_segflg = segflg;
762 auio.uio_rw = UIO_WRITE;
764 auio.uio_offset = 0; /* XXX */
767 for (i = 0; i < mp->msg_iovlen; i++, iov++) {
768 if ((auio.uio_resid += iov->iov_len) < 0) {
775 if (KTRPOINT(td, KTR_GENIO))
776 ktruio = cloneuio(&auio);
778 len = auio.uio_resid;
779 error = sosend(so, mp->msg_name, &auio, 0, control, flags, td);
781 if (auio.uio_resid != len && (error == ERESTART ||
782 error == EINTR || error == EWOULDBLOCK))
784 /* Generation of SIGPIPE can be controlled per socket */
785 if (error == EPIPE && !(so->so_options & SO_NOSIGPIPE) &&
786 !(flags & MSG_NOSIGNAL)) {
787 PROC_LOCK(td->td_proc);
788 tdsignal(td, SIGPIPE);
789 PROC_UNLOCK(td->td_proc);
793 td->td_retval[0] = len - auio.uio_resid;
795 if (ktruio != NULL) {
796 ktruio->uio_resid = td->td_retval[0];
797 ktrgenio(s, UIO_WRITE, ktruio, error);
806 sys_sendto(struct thread *td, struct sendto_args *uap)
811 msg.msg_name = uap->to;
812 msg.msg_namelen = uap->tolen;
816 #ifdef COMPAT_OLDSOCK
819 aiov.iov_base = uap->buf;
820 aiov.iov_len = uap->len;
821 return (sendit(td, uap->s, &msg, uap->flags));
824 #ifdef COMPAT_OLDSOCK
826 osend(struct thread *td, struct osend_args *uap)
835 aiov.iov_base = uap->buf;
836 aiov.iov_len = uap->len;
839 return (sendit(td, uap->s, &msg, uap->flags));
843 osendmsg(struct thread *td, struct osendmsg_args *uap)
849 error = copyin(uap->msg, &msg, sizeof (struct omsghdr));
852 error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE);
856 msg.msg_flags = MSG_COMPAT;
857 error = sendit(td, uap->s, &msg, uap->flags);
864 sys_sendmsg(struct thread *td, struct sendmsg_args *uap)
870 error = copyin(uap->msg, &msg, sizeof (msg));
873 error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE);
877 #ifdef COMPAT_OLDSOCK
880 error = sendit(td, uap->s, &msg, uap->flags);
886 kern_recvit(struct thread *td, int s, struct msghdr *mp, enum uio_seg fromseg,
887 struct mbuf **controlp)
891 struct mbuf *m, *control = NULL;
895 struct sockaddr *fromsa = NULL;
898 struct uio *ktruio = NULL;
903 if (controlp != NULL)
907 error = getsock_cap(td, s, cap_rights_init(&rights, CAP_RECV),
914 error = mac_socket_check_receive(td->td_ucred, so);
921 auio.uio_iov = mp->msg_iov;
922 auio.uio_iovcnt = mp->msg_iovlen;
923 auio.uio_segflg = UIO_USERSPACE;
924 auio.uio_rw = UIO_READ;
926 auio.uio_offset = 0; /* XXX */
929 for (i = 0; i < mp->msg_iovlen; i++, iov++) {
930 if ((auio.uio_resid += iov->iov_len) < 0) {
936 if (KTRPOINT(td, KTR_GENIO))
937 ktruio = cloneuio(&auio);
939 len = auio.uio_resid;
940 error = soreceive(so, &fromsa, &auio, NULL,
941 (mp->msg_control || controlp) ? &control : NULL,
944 if (auio.uio_resid != len && (error == ERESTART ||
945 error == EINTR || error == EWOULDBLOCK))
949 AUDIT_ARG_SOCKADDR(td, AT_FDCWD, fromsa);
951 if (ktruio != NULL) {
952 ktruio->uio_resid = len - auio.uio_resid;
953 ktrgenio(s, UIO_READ, ktruio, error);
958 td->td_retval[0] = len - auio.uio_resid;
960 len = mp->msg_namelen;
961 if (len <= 0 || fromsa == NULL)
964 /* save sa_len before it is destroyed by MSG_COMPAT */
965 len = MIN(len, fromsa->sa_len);
966 #ifdef COMPAT_OLDSOCK
967 if (mp->msg_flags & MSG_COMPAT)
968 ((struct osockaddr *)fromsa)->sa_family =
971 if (fromseg == UIO_USERSPACE) {
972 error = copyout(fromsa, mp->msg_name,
977 bcopy(fromsa, mp->msg_name, len);
979 mp->msg_namelen = len;
981 if (mp->msg_control && controlp == NULL) {
982 #ifdef COMPAT_OLDSOCK
984 * We assume that old recvmsg calls won't receive access
985 * rights and other control info, esp. as control info
986 * is always optional and those options didn't exist in 4.3.
987 * If we receive rights, trim the cmsghdr; anything else
990 if (control && mp->msg_flags & MSG_COMPAT) {
991 if (mtod(control, struct cmsghdr *)->cmsg_level !=
993 mtod(control, struct cmsghdr *)->cmsg_type !=
995 mp->msg_controllen = 0;
998 control->m_len -= sizeof (struct cmsghdr);
999 control->m_data += sizeof (struct cmsghdr);
1002 len = mp->msg_controllen;
1004 mp->msg_controllen = 0;
1005 ctlbuf = mp->msg_control;
1007 while (m && len > 0) {
1008 unsigned int tocopy;
1010 if (len >= m->m_len)
1013 mp->msg_flags |= MSG_CTRUNC;
1017 if ((error = copyout(mtod(m, caddr_t),
1018 ctlbuf, tocopy)) != 0)
1025 mp->msg_controllen = ctlbuf - (caddr_t)mp->msg_control;
1030 if (fromsa && KTRPOINT(td, KTR_STRUCT))
1031 ktrsockaddr(fromsa);
1033 free(fromsa, M_SONAME);
1035 if (error == 0 && controlp != NULL)
1036 *controlp = control;
1044 recvit(struct thread *td, int s, struct msghdr *mp, void *namelenp)
1048 error = kern_recvit(td, s, mp, UIO_USERSPACE, NULL);
1051 if (namelenp != NULL) {
1052 error = copyout(&mp->msg_namelen, namelenp, sizeof (socklen_t));
1053 #ifdef COMPAT_OLDSOCK
1054 if (mp->msg_flags & MSG_COMPAT)
1055 error = 0; /* old recvfrom didn't check */
1062 sys_recvfrom(struct thread *td, struct recvfrom_args *uap)
1068 if (uap->fromlenaddr) {
1069 error = copyin(uap->fromlenaddr,
1070 &msg.msg_namelen, sizeof (msg.msg_namelen));
1074 msg.msg_namelen = 0;
1076 msg.msg_name = uap->from;
1077 msg.msg_iov = &aiov;
1079 aiov.iov_base = uap->buf;
1080 aiov.iov_len = uap->len;
1081 msg.msg_control = 0;
1082 msg.msg_flags = uap->flags;
1083 error = recvit(td, uap->s, &msg, uap->fromlenaddr);
1088 #ifdef COMPAT_OLDSOCK
1090 orecvfrom(struct thread *td, struct recvfrom_args *uap)
1093 uap->flags |= MSG_COMPAT;
1094 return (sys_recvfrom(td, uap));
1098 #ifdef COMPAT_OLDSOCK
1100 orecv(struct thread *td, struct orecv_args *uap)
1106 msg.msg_namelen = 0;
1107 msg.msg_iov = &aiov;
1109 aiov.iov_base = uap->buf;
1110 aiov.iov_len = uap->len;
1111 msg.msg_control = 0;
1112 msg.msg_flags = uap->flags;
1113 return (recvit(td, uap->s, &msg, NULL));
1117 * Old recvmsg. This code takes advantage of the fact that the old msghdr
1118 * overlays the new one, missing only the flags, and with the (old) access
1119 * rights where the control fields are now.
1122 orecvmsg(struct thread *td, struct orecvmsg_args *uap)
1128 error = copyin(uap->msg, &msg, sizeof (struct omsghdr));
1131 error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE);
1134 msg.msg_flags = uap->flags | MSG_COMPAT;
1136 error = recvit(td, uap->s, &msg, &uap->msg->msg_namelen);
1137 if (msg.msg_controllen && error == 0)
1138 error = copyout(&msg.msg_controllen,
1139 &uap->msg->msg_accrightslen, sizeof (int));
1146 sys_recvmsg(struct thread *td, struct recvmsg_args *uap)
1149 struct iovec *uiov, *iov;
1152 error = copyin(uap->msg, &msg, sizeof (msg));
1155 error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE);
1158 msg.msg_flags = uap->flags;
1159 #ifdef COMPAT_OLDSOCK
1160 msg.msg_flags &= ~MSG_COMPAT;
1164 error = recvit(td, uap->s, &msg, NULL);
1167 error = copyout(&msg, uap->msg, sizeof(msg));
1174 sys_shutdown(struct thread *td, struct shutdown_args *uap)
1177 return (kern_shutdown(td, uap->s, uap->how));
1181 kern_shutdown(struct thread *td, int s, int how)
1185 cap_rights_t rights;
1189 error = getsock_cap(td, s, cap_rights_init(&rights, CAP_SHUTDOWN),
1193 error = soshutdown(so, how);
1195 * Previous versions did not return ENOTCONN, but 0 in
1196 * case the socket was not connected. Some important
1197 * programs like syslogd up to r279016, 2015-02-19,
1198 * still depend on this behavior.
1200 if (error == ENOTCONN &&
1201 td->td_proc->p_osrel < P_OSREL_SHUTDOWN_ENOTCONN)
1209 sys_setsockopt(struct thread *td, struct setsockopt_args *uap)
1212 return (kern_setsockopt(td, uap->s, uap->level, uap->name,
1213 uap->val, UIO_USERSPACE, uap->valsize));
1217 kern_setsockopt(struct thread *td, int s, int level, int name, void *val,
1218 enum uio_seg valseg, socklen_t valsize)
1222 struct sockopt sopt;
1223 cap_rights_t rights;
1226 if (val == NULL && valsize != 0)
1228 if ((int)valsize < 0)
1231 sopt.sopt_dir = SOPT_SET;
1232 sopt.sopt_level = level;
1233 sopt.sopt_name = name;
1234 sopt.sopt_val = val;
1235 sopt.sopt_valsize = valsize;
1241 sopt.sopt_td = NULL;
1244 panic("kern_setsockopt called with bad valseg");
1248 error = getsock_cap(td, s, cap_rights_init(&rights, CAP_SETSOCKOPT),
1252 error = sosetopt(so, &sopt);
1259 sys_getsockopt(struct thread *td, struct getsockopt_args *uap)
1265 error = copyin(uap->avalsize, &valsize, sizeof (valsize));
1270 error = kern_getsockopt(td, uap->s, uap->level, uap->name,
1271 uap->val, UIO_USERSPACE, &valsize);
1274 error = copyout(&valsize, uap->avalsize, sizeof (valsize));
1279 * Kernel version of getsockopt.
1280 * optval can be a userland or userspace. optlen is always a kernel pointer.
1283 kern_getsockopt(struct thread *td, int s, int level, int name, void *val,
1284 enum uio_seg valseg, socklen_t *valsize)
1288 struct sockopt sopt;
1289 cap_rights_t rights;
1294 if ((int)*valsize < 0)
1297 sopt.sopt_dir = SOPT_GET;
1298 sopt.sopt_level = level;
1299 sopt.sopt_name = name;
1300 sopt.sopt_val = val;
1301 sopt.sopt_valsize = (size_t)*valsize; /* checked non-negative above */
1307 sopt.sopt_td = NULL;
1310 panic("kern_getsockopt called with bad valseg");
1314 error = getsock_cap(td, s, cap_rights_init(&rights, CAP_GETSOCKOPT),
1318 error = sogetopt(so, &sopt);
1319 *valsize = sopt.sopt_valsize;
1326 * getsockname1() - Get socket name.
1329 getsockname1(struct thread *td, struct getsockname_args *uap, int compat)
1331 struct sockaddr *sa;
1335 error = copyin(uap->alen, &len, sizeof(len));
1339 error = kern_getsockname(td, uap->fdes, &sa, &len);
1344 #ifdef COMPAT_OLDSOCK
1346 ((struct osockaddr *)sa)->sa_family = sa->sa_family;
1348 error = copyout(sa, uap->asa, (u_int)len);
1352 error = copyout(&len, uap->alen, sizeof(len));
1357 kern_getsockname(struct thread *td, int fd, struct sockaddr **sa,
1362 cap_rights_t rights;
1367 error = getsock_cap(td, fd, cap_rights_init(&rights, CAP_GETSOCKNAME),
1373 CURVNET_SET(so->so_vnet);
1374 error = (*so->so_proto->pr_usrreqs->pru_sockaddr)(so, sa);
1381 len = MIN(*alen, (*sa)->sa_len);
1384 if (KTRPOINT(td, KTR_STRUCT))
1389 if (error != 0 && *sa != NULL) {
1390 free(*sa, M_SONAME);
1397 sys_getsockname(struct thread *td, struct getsockname_args *uap)
1400 return (getsockname1(td, uap, 0));
1403 #ifdef COMPAT_OLDSOCK
1405 ogetsockname(struct thread *td, struct getsockname_args *uap)
1408 return (getsockname1(td, uap, 1));
1410 #endif /* COMPAT_OLDSOCK */
1413 * getpeername1() - Get name of peer for connected socket.
1416 getpeername1(struct thread *td, struct getpeername_args *uap, int compat)
1418 struct sockaddr *sa;
1422 error = copyin(uap->alen, &len, sizeof (len));
1426 error = kern_getpeername(td, uap->fdes, &sa, &len);
1431 #ifdef COMPAT_OLDSOCK
1433 ((struct osockaddr *)sa)->sa_family = sa->sa_family;
1435 error = copyout(sa, uap->asa, (u_int)len);
1439 error = copyout(&len, uap->alen, sizeof(len));
1444 kern_getpeername(struct thread *td, int fd, struct sockaddr **sa,
1449 cap_rights_t rights;
1454 error = getsock_cap(td, fd, cap_rights_init(&rights, CAP_GETPEERNAME),
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;