2 * Copyright (c) 1982, 1986, 1989, 1990, 1993
3 * The Regents of the University of California. All rights reserved.
5 * sendfile(2) and related extensions:
6 * Copyright (c) 1998, David Greenman. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * @(#)uipc_syscalls.c 8.4 (Berkeley) 2/21/94
37 * $FreeBSD: src/sys/kern/uipc_syscalls.c,v 1.65.2.17 2003/04/04 17:11:16 tegge Exp $
38 * $DragonFly: src/sys/kern/uipc_syscalls.c,v 1.24 2004/03/01 06:33:17 dillon Exp $
41 #include "opt_ktrace.h"
43 #include <sys/param.h>
44 #include <sys/systm.h>
45 #include <sys/kernel.h>
46 #include <sys/sysproto.h>
47 #include <sys/malloc.h>
48 #include <sys/filedesc.h>
49 #include <sys/event.h>
51 #include <sys/fcntl.h>
53 #include <sys/filio.h>
54 #include <sys/kern_syscall.h>
56 #include <sys/protosw.h>
57 #include <sys/sfbuf.h>
58 #include <sys/socket.h>
59 #include <sys/socketvar.h>
60 #include <sys/signalvar.h>
62 #include <sys/vnode.h>
64 #include <sys/mount.h>
66 #include <sys/ktrace.h>
69 #include <vm/vm_object.h>
70 #include <vm/vm_page.h>
71 #include <vm/vm_pageout.h>
72 #include <vm/vm_kern.h>
73 #include <vm/vm_extern.h>
74 #include <sys/file2.h>
77 * System call interface to the socket abstraction.
80 extern struct fileops socketops;
83 * socket_args(int domain, int type, int protocol)
86 kern_socket(int domain, int type, int protocol, int *res)
88 struct thread *td = curthread;
89 struct proc *p = td->td_proc;
98 error = falloc(p, &fp, &fd);
102 error = socreate(domain, &so, type, protocol, td);
104 if (fdp->fd_ofiles[fd] == fp) {
105 fdp->fd_ofiles[fd] = NULL;
109 fp->f_data = (caddr_t)so;
110 fp->f_flag = FREAD|FWRITE;
111 fp->f_ops = &socketops;
112 fp->f_type = DTYPE_SOCKET;
120 socket(struct socket_args *uap)
124 error = kern_socket(uap->domain, uap->type, uap->protocol,
125 &uap->sysmsg_result);
130 kern_bind(int s, struct sockaddr *sa)
132 struct thread *td = curthread;
133 struct proc *p = td->td_proc;
138 error = holdsock(p->p_fd, s, &fp);
141 error = sobind((struct socket *)fp->f_data, sa, td);
147 * bind_args(int s, caddr_t name, int namelen)
150 bind(struct bind_args *uap)
155 error = getsockaddr(&sa, uap->name, uap->namelen);
158 error = kern_bind(uap->s, sa);
165 kern_listen(int s, int backlog)
167 struct thread *td = curthread;
168 struct proc *p = td->td_proc;
173 error = holdsock(p->p_fd, s, &fp);
176 error = solisten((struct socket *)fp->f_data, backlog, td);
182 * listen_args(int s, int backlog)
185 listen(struct listen_args *uap)
189 error = kern_listen(uap->s, uap->backlog);
194 * The second argument to kern_accept() is a handle to a struct sockaddr.
195 * This allows kern_accept() to return a pointer to an allocated struct
196 * sockaddr which must be freed later with FREE(). The caller must
197 * initialize *name to NULL.
200 kern_accept(int s, struct sockaddr **name, int *namelen, int *res)
202 struct thread *td = curthread;
203 struct proc *p = td->td_proc;
204 struct filedesc *fdp = p->p_fd;
205 struct file *lfp = NULL;
206 struct file *nfp = NULL;
209 struct socket *head, *so;
211 u_int fflag; /* type must match fp->f_flag */
214 if (name && namelen && *namelen < 0)
217 error = holdsock(fdp, s, &lfp);
221 head = (struct socket *)lfp->f_data;
222 if ((head->so_options & SO_ACCEPTCONN) == 0) {
227 while (TAILQ_EMPTY(&head->so_comp) && head->so_error == 0) {
228 if (head->so_state & SS_CANTRCVMORE) {
229 head->so_error = ECONNABORTED;
232 if ((head->so_state & SS_NBIO) != 0) {
233 head->so_error = EWOULDBLOCK;
236 error = tsleep((caddr_t)&head->so_timeo, PCATCH, "accept", 0);
242 if (head->so_error) {
243 error = head->so_error;
250 * At this point we know that there is at least one connection
251 * ready to be accepted. Remove it from the queue prior to
252 * allocating the file descriptor for it since falloc() may
253 * block allowing another process to accept the connection
256 so = TAILQ_FIRST(&head->so_comp);
257 TAILQ_REMOVE(&head->so_comp, so, so_list);
261 error = falloc(p, &nfp, &fd);
264 * Probably ran out of file descriptors. Put the
265 * unaccepted connection back onto the queue and
266 * do another wakeup so some other process might
267 * have a chance at it.
269 TAILQ_INSERT_HEAD(&head->so_comp, so, so_list);
271 wakeup_one(&head->so_timeo);
278 /* connection has been removed from the listen queue */
279 KNOTE(&head->so_rcv.sb_sel.si_note, 0);
281 so->so_state &= ~SS_COMP;
283 if (head->so_sigio != NULL)
284 fsetown(fgetown(head->so_sigio), &so->so_sigio);
286 nfp->f_data = (caddr_t)so;
288 nfp->f_ops = &socketops;
289 nfp->f_type = DTYPE_SOCKET;
290 /* Sync socket nonblocking/async state with file flags */
291 tmp = fflag & FNONBLOCK;
292 (void) fo_ioctl(nfp, FIONBIO, (caddr_t)&tmp, td);
293 tmp = fflag & FASYNC;
294 (void) fo_ioctl(nfp, FIOASYNC, (caddr_t)&tmp, td);
297 error = soaccept(so, &sa);
300 * Set the returned name and namelen as applicable. Set the returned
301 * namelen to 0 for older code which might ignore the return value
305 if (sa && name && namelen) {
306 if (*namelen > sa->sa_len)
307 *namelen = sa->sa_len;
316 * close the new descriptor, assuming someone hasn't ripped it
317 * out from under us. Note that *res is normally ignored if an
318 * error is returned but a syscall message will still have access
319 * to the result code.
323 if (fdp->fd_ofiles[fd] == nfp) {
324 fdp->fd_ofiles[fd] = NULL;
331 * Release explicitly held references before returning.
341 * accept_args(int s, caddr_t name, int *anamelen)
344 accept(struct accept_args *uap)
346 struct sockaddr *sa = NULL;
351 error = copyin(uap->anamelen, &sa_len, sizeof(sa_len));
355 error = kern_accept(uap->s, &sa, &sa_len, &uap->sysmsg_result);
358 error = copyout(sa, uap->name, sa_len);
360 error = copyout(&sa_len, uap->anamelen,
361 sizeof(*uap->anamelen));
366 error = kern_accept(uap->s, NULL, 0, &uap->sysmsg_result);
372 kern_connect(int s, struct sockaddr *sa)
374 struct thread *td = curthread;
375 struct proc *p = td->td_proc;
380 error = holdsock(p->p_fd, s, &fp);
383 so = (struct socket *)fp->f_data;
384 if ((so->so_state & SS_NBIO) && (so->so_state & SS_ISCONNECTING)) {
388 error = soconnect(so, sa, td);
391 if ((so->so_state & SS_NBIO) && (so->so_state & SS_ISCONNECTING)) {
396 while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) {
397 error = tsleep((caddr_t)&so->so_timeo, PCATCH, "connec", 0);
402 error = so->so_error;
407 so->so_state &= ~SS_ISCONNECTING;
408 if (error == ERESTART)
416 * connect_args(int s, caddr_t name, int namelen)
419 connect(struct connect_args *uap)
424 error = getsockaddr(&sa, uap->name, uap->namelen);
427 error = kern_connect(uap->s, sa);
434 kern_socketpair(int domain, int type, int protocol, int *sv)
436 struct thread *td = curthread;
437 struct proc *p = td->td_proc;
438 struct filedesc *fdp;
439 struct file *fp1, *fp2;
440 struct socket *so1, *so2;
445 error = socreate(domain, &so1, type, protocol, td);
448 error = socreate(domain, &so2, type, protocol, td);
451 error = falloc(p, &fp1, &fd);
456 fp1->f_data = (caddr_t)so1;
457 error = falloc(p, &fp2, &fd);
461 fp2->f_data = (caddr_t)so2;
463 error = soconnect2(so1, so2);
466 if (type == SOCK_DGRAM) {
468 * Datagram socket connection is asymmetric.
470 error = soconnect2(so2, so1);
474 fp1->f_flag = fp2->f_flag = FREAD|FWRITE;
475 fp1->f_ops = fp2->f_ops = &socketops;
476 fp1->f_type = fp2->f_type = DTYPE_SOCKET;
481 if (fdp->fd_ofiles[sv[1]] == fp2) {
482 fdp->fd_ofiles[sv[1]] = NULL;
487 if (fdp->fd_ofiles[sv[0]] == fp1) {
488 fdp->fd_ofiles[sv[0]] = NULL;
500 * socketpair(int domain, int type, int protocol, int *rsv)
503 socketpair(struct socketpair_args *uap)
507 error = kern_socketpair(uap->domain, uap->type, uap->protocol, sockv);
510 error = copyout(sockv, uap->rsv, sizeof(sockv));
515 kern_sendmsg(int s, struct sockaddr *sa, struct uio *auio,
516 struct mbuf *control, int flags, int *res)
518 struct thread *td = curthread;
519 struct proc *p = td->td_proc;
524 struct iovec *ktriov = NULL;
528 error = holdsock(p->p_fd, s, &fp);
531 if (auio->uio_resid < 0) {
536 if (KTRPOINT(td, KTR_GENIO)) {
537 int iovlen = auio->uio_iovcnt * sizeof (struct iovec);
539 MALLOC(ktriov, struct iovec *, iovlen, M_TEMP, M_WAITOK);
540 bcopy((caddr_t)auio->uio_iov, (caddr_t)ktriov, iovlen);
544 len = auio->uio_resid;
545 so = (struct socket *)fp->f_data;
546 error = so->so_proto->pr_usrreqs->pru_sosend(so, sa, auio, NULL,
549 if (auio->uio_resid != len && (error == ERESTART ||
550 error == EINTR || error == EWOULDBLOCK))
556 if (ktriov != NULL) {
558 ktruio.uio_iov = ktriov;
559 ktruio.uio_resid = len - auio->uio_resid;
560 ktrgenio(p->p_tracep, s, UIO_WRITE, &ktruio, error);
562 FREE(ktriov, M_TEMP);
566 *res = len - auio->uio_resid;
573 * sendto_args(int s, caddr_t buf, size_t len, int flags, caddr_t to, int tolen)
576 sendto(struct sendto_args *uap)
578 struct thread *td = curthread;
581 struct sockaddr *sa = NULL;
585 error = getsockaddr(&sa, uap->to, uap->tolen);
589 aiov.iov_base = uap->buf;
590 aiov.iov_len = uap->len;
591 auio.uio_iov = &aiov;
594 auio.uio_resid = uap->len;
595 auio.uio_segflg = UIO_USERSPACE;
596 auio.uio_rw = UIO_WRITE;
599 error = kern_sendmsg(uap->s, sa, &auio, NULL, uap->flags,
600 &uap->sysmsg_result);
608 * sendmsg_args(int s, caddr_t msg, int flags)
611 sendmsg(struct sendmsg_args *uap)
613 struct thread *td = curthread;
616 struct iovec aiov[UIO_SMALLIOV], *iov = NULL;
617 struct sockaddr *sa = NULL;
618 struct mbuf *control = NULL;
621 error = copyin(uap->msg, (caddr_t)&msg, sizeof(msg));
626 * Conditionally copyin msg.msg_name.
629 error = getsockaddr(&sa, msg.msg_name, msg.msg_namelen);
637 error = iovec_copyin(msg.msg_iov, &iov, aiov, msg.msg_iovlen,
642 auio.uio_iovcnt = msg.msg_iovlen;
644 auio.uio_segflg = UIO_USERSPACE;
645 auio.uio_rw = UIO_WRITE;
649 * Conditionally copyin msg.msg_control.
651 if (msg.msg_control) {
652 if (msg.msg_controllen < sizeof(struct cmsghdr) ||
653 msg.msg_controllen > MLEN) {
657 control = m_get(M_WAIT, MT_CONTROL);
658 if (control == NULL) {
662 control->m_len = msg.msg_controllen;
663 error = copyin(msg.msg_control, mtod(control, caddr_t),
671 error = kern_sendmsg(uap->s, sa, &auio, control, uap->flags,
672 &uap->sysmsg_result);
677 iovec_free(&iov, aiov);
682 * kern_recvmsg() takes a handle to sa and control. If the handle is non-
683 * null, it returns a dynamically allocated struct sockaddr and an mbuf.
684 * Don't forget to FREE() and m_free() these if they are returned.
687 kern_recvmsg(int s, struct sockaddr **sa, struct uio *auio,
688 struct mbuf **control, int *flags, int *res)
690 struct thread *td = curthread;
691 struct proc *p = td->td_proc;
696 struct iovec *ktriov = NULL;
700 error = holdsock(p->p_fd, s, &fp);
703 if (auio->uio_resid < 0) {
708 if (KTRPOINT(td, KTR_GENIO)) {
709 int iovlen = auio->uio_iovcnt * sizeof (struct iovec);
711 MALLOC(ktriov, struct iovec *, iovlen, M_TEMP, M_WAITOK);
712 bcopy(auio->uio_iov, ktriov, iovlen);
716 len = auio->uio_resid;
717 so = (struct socket *)fp->f_data;
718 error = so->so_proto->pr_usrreqs->pru_soreceive(so, sa, auio, NULL,
721 if (auio->uio_resid != len && (error == ERESTART ||
722 error == EINTR || error == EWOULDBLOCK))
726 if (ktriov != NULL) {
728 ktruio.uio_iov = ktriov;
729 ktruio.uio_resid = len - auio->uio_resid;
730 ktrgenio(p->p_tracep, s, UIO_READ, &ktruio, error);
732 FREE(ktriov, M_TEMP);
736 *res = len - auio->uio_resid;
743 * recvfrom_args(int s, caddr_t buf, size_t len, int flags,
744 * caddr_t from, int *fromlenaddr)
747 recvfrom(struct recvfrom_args *uap)
749 struct thread *td = curthread;
752 struct sockaddr *sa = NULL;
755 if (uap->from && uap->fromlenaddr) {
756 error = copyin(uap->fromlenaddr, &fromlen, sizeof(fromlen));
764 aiov.iov_base = uap->buf;
765 aiov.iov_len = uap->len;
766 auio.uio_iov = &aiov;
769 auio.uio_resid = uap->len;
770 auio.uio_segflg = UIO_USERSPACE;
771 auio.uio_rw = UIO_READ;
774 error = kern_recvmsg(uap->s, uap->from ? &sa : NULL, &auio, NULL,
775 &uap->flags, &uap->sysmsg_result);
777 if (error == 0 && uap->from) {
778 /* note: sa may still be NULL */
780 fromlen = MIN(fromlen, sa->sa_len);
781 error = copyout(sa, uap->from, fromlen);
786 error = copyout(&fromlen, uap->fromlenaddr,
797 * recvmsg_args(int s, struct msghdr *msg, int flags)
800 recvmsg(struct recvmsg_args *uap)
802 struct thread *td = curthread;
805 struct iovec aiov[UIO_SMALLIOV], *iov = NULL;
806 struct mbuf *m, *control = NULL;
807 struct sockaddr *sa = NULL;
809 socklen_t *ufromlenp, *ucontrollenp;
810 int error, fromlen, controllen, len, flags, *uflagsp;
813 * This copyin handles everything except the iovec.
815 error = copyin(uap->msg, &msg, sizeof(msg));
819 if (msg.msg_name && msg.msg_namelen < 0)
821 if (msg.msg_control && msg.msg_controllen < 0)
824 ufromlenp = (socklen_t *)((caddr_t)uap->msg + offsetof(struct msghdr,
826 ucontrollenp = (socklen_t *)((caddr_t)uap->msg + offsetof(struct msghdr,
828 uflagsp = (int *)((caddr_t)uap->msg + offsetof(struct msghdr,
834 error = iovec_copyin(msg.msg_iov, &iov, aiov, msg.msg_iovlen,
839 auio.uio_iovcnt = msg.msg_iovlen;
841 auio.uio_segflg = UIO_USERSPACE;
842 auio.uio_rw = UIO_READ;
845 flags = msg.msg_flags;
847 error = kern_recvmsg(uap->s, msg.msg_name ? &sa : NULL, &auio,
848 msg.msg_control ? &control : NULL, &flags, &uap->sysmsg_result);
851 * Conditionally copyout the name and populate the namelen field.
853 if (error == 0 && msg.msg_name) {
854 fromlen = MIN(msg.msg_namelen, sa->sa_len);
855 error = copyout(sa, msg.msg_name, fromlen);
857 error = copyout(&fromlen, ufromlenp,
862 * Copyout msg.msg_control and msg.msg_controllen.
864 if (error == 0 && msg.msg_control) {
865 len = msg.msg_controllen;
867 ctlbuf = (caddr_t)msg.msg_control;
869 while(m && len > 0) {
872 if (len >= m->m_len) {
875 msg.msg_flags |= MSG_CTRUNC;
879 error = copyout(mtod(m, caddr_t), ctlbuf, tocopy);
887 controllen = ctlbuf - (caddr_t)msg.msg_control;
888 error = copyout(&controllen, ucontrollenp,
889 sizeof(*ucontrollenp));
893 error = copyout(&flags, uflagsp, sizeof(*uflagsp));
898 iovec_free(&iov, aiov);
905 * shutdown_args(int s, int how)
908 kern_shutdown(int s, int how)
910 struct thread *td = curthread;
911 struct proc *p = td->td_proc;
916 error = holdsock(p->p_fd, s, &fp);
919 error = soshutdown((struct socket *)fp->f_data, how);
925 shutdown(struct shutdown_args *uap)
929 error = kern_shutdown(uap->s, uap->how);
935 * If sopt->sopt_td == NULL, then sopt->sopt_val is treated as an
936 * in kernel pointer instead of a userland pointer. This allows us
937 * to manipulate socket options in the emulation code.
940 kern_setsockopt(int s, struct sockopt *sopt)
942 struct thread *td = curthread;
943 struct proc *p = td->td_proc;
947 if (sopt->sopt_val == 0 && sopt->sopt_valsize != 0)
949 if (sopt->sopt_valsize < 0)
952 error = holdsock(p->p_fd, s, &fp);
956 error = sosetopt((struct socket *)fp->f_data, sopt);
962 * setsockopt_args(int s, int level, int name, caddr_t val, int valsize)
965 setsockopt(struct setsockopt_args *uap)
967 struct thread *td = curthread;
971 sopt.sopt_dir = SOPT_SET;
972 sopt.sopt_level = uap->level;
973 sopt.sopt_name = uap->name;
974 sopt.sopt_val = uap->val;
975 sopt.sopt_valsize = uap->valsize;
978 error = kern_setsockopt(uap->s, &sopt);
983 * If sopt->sopt_td == NULL, then sopt->sopt_val is treated as an
984 * in kernel pointer instead of a userland pointer. This allows us
985 * to manipulate socket options in the emulation code.
988 kern_getsockopt(int s, struct sockopt *sopt)
990 struct thread *td = curthread;
991 struct proc *p = td->td_proc;
995 if (sopt->sopt_val == 0 && sopt->sopt_valsize != 0)
997 if (sopt->sopt_valsize < 0)
1000 error = holdsock(p->p_fd, s, &fp);
1004 error = sogetopt((struct socket *)fp->f_data, sopt);
1010 * getsockopt_Args(int s, int level, int name, caddr_t val, int *avalsize)
1013 getsockopt(struct getsockopt_args *uap)
1015 struct thread *td = curthread;
1016 struct sockopt sopt;
1020 error = copyin(uap->avalsize, &valsize, sizeof(valsize));
1029 sopt.sopt_dir = SOPT_GET;
1030 sopt.sopt_level = uap->level;
1031 sopt.sopt_name = uap->name;
1032 sopt.sopt_val = uap->val;
1033 sopt.sopt_valsize = valsize;
1036 error = kern_getsockopt(uap->s, &sopt);
1038 valsize = sopt.sopt_valsize;
1039 error = copyout(&valsize, uap->avalsize, sizeof(valsize));
1045 * The second argument to kern_getsockname() is a handle to a struct sockaddr.
1046 * This allows kern_getsockname() to return a pointer to an allocated struct
1047 * sockaddr which must be freed later with FREE(). The caller must
1048 * initialize *name to NULL.
1051 kern_getsockname(int s, struct sockaddr **name, int *namelen)
1053 struct thread *td = curthread;
1054 struct proc *p = td->td_proc;
1057 struct sockaddr *sa = NULL;
1060 error = holdsock(p->p_fd, s, &fp);
1067 so = (struct socket *)fp->f_data;
1068 error = (*so->so_proto->pr_usrreqs->pru_sockaddr)(so, &sa);
1073 *namelen = MIN(*namelen, sa->sa_len);
1083 * getsockname_args(int fdes, caddr_t asa, int *alen)
1088 getsockname(struct getsockname_args *uap)
1090 struct sockaddr *sa = NULL;
1093 error = copyin(uap->alen, &sa_len, sizeof(sa_len));
1097 error = kern_getsockname(uap->fdes, &sa, &sa_len);
1100 error = copyout(sa, uap->asa, sa_len);
1102 error = copyout(&sa_len, uap->alen, sizeof(*uap->alen));
1109 * The second argument to kern_getpeername() is a handle to a struct sockaddr.
1110 * This allows kern_getpeername() to return a pointer to an allocated struct
1111 * sockaddr which must be freed later with FREE(). The caller must
1112 * initialize *name to NULL.
1115 kern_getpeername(int s, struct sockaddr **name, int *namelen)
1117 struct thread *td = curthread;
1118 struct proc *p = td->td_proc;
1121 struct sockaddr *sa = NULL;
1124 error = holdsock(p->p_fd, s, &fp);
1131 so = (struct socket *)fp->f_data;
1132 if ((so->so_state & (SS_ISCONNECTED|SS_ISCONFIRMING)) == 0) {
1136 error = (*so->so_proto->pr_usrreqs->pru_peeraddr)(so, &sa);
1141 *namelen = MIN(*namelen, sa->sa_len);
1151 * getpeername_args(int fdes, caddr_t asa, int *alen)
1153 * Get name of peer for connected socket.
1156 getpeername(struct getpeername_args *uap)
1158 struct sockaddr *sa = NULL;
1161 error = copyin(uap->alen, &sa_len, sizeof(sa_len));
1165 error = kern_getpeername(uap->fdes, &sa, &sa_len);
1168 error = copyout(sa, uap->asa, sa_len);
1170 error = copyout(&sa_len, uap->alen, sizeof(*uap->alen));
1177 getsockaddr(struct sockaddr **namp, caddr_t uaddr, size_t len)
1179 struct sockaddr *sa;
1183 if (len > SOCK_MAXADDRLEN)
1184 return ENAMETOOLONG;
1185 if (len < offsetof(struct sockaddr, sa_data[0]))
1187 MALLOC(sa, struct sockaddr *, len, M_SONAME, M_WAITOK);
1188 error = copyin(uaddr, sa, len);
1192 #if BYTE_ORDER != BIG_ENDIAN
1194 * The bind(), connect(), and sendto() syscalls were not
1195 * versioned for COMPAT_43. Thus, this check must stay.
1197 if (sa->sa_family == 0 && sa->sa_len < AF_MAX)
1198 sa->sa_family = sa->sa_len;
1207 * holdsock() - load the struct file pointer associated
1208 * with a socket into *fpp. If an error occurs, non-zero
1209 * will be returned and *fpp will be set to NULL.
1212 holdsock(fdp, fdes, fpp)
1213 struct filedesc *fdp;
1217 struct file *fp = NULL;
1220 if ((unsigned)fdes >= fdp->fd_nfiles ||
1221 (fp = fdp->fd_ofiles[fdes]) == NULL) {
1223 } else if (fp->f_type != DTYPE_SOCKET) {
1235 * int sendfile(int fd, int s, off_t offset, size_t nbytes,
1236 * struct sf_hdtr *hdtr, off_t *sbytes, int flags)
1238 * Send a file specified by 'fd' and starting at 'offset' to a socket
1239 * specified by 's'. Send only 'nbytes' of the file or until EOF if
1240 * nbytes == 0. Optionally add a header and/or trailer to the socket
1241 * output. If specified, write the total number of bytes sent into *sbytes.
1243 * In FreeBSD kern/uipc_syscalls.c,v 1.103, a bug was fixed that caused
1244 * the headers to count against the remaining bytes to be sent from
1245 * the file descriptor. We may wish to implement a compatibility syscall
1249 sendfile(struct sendfile_args *uap)
1251 struct thread *td = curthread;
1252 struct proc *p = td->td_proc;
1254 struct filedesc *fdp;
1255 struct vnode *vp = NULL;
1256 struct sf_hdtr hdtr;
1257 struct iovec aiov[UIO_SMALLIOV], *iov = NULL;
1259 off_t hdtr_size = 0, sbytes;
1266 * Do argument checking. Must be a regular file in, stream
1267 * type and connected socket out, positive offset.
1269 fp = holdfp(fdp, uap->fd, FREAD);
1273 if (fp->f_type != DTYPE_VNODE) {
1277 vp = (struct vnode *)fp->f_data;
1282 * If specified, get the pointer to the sf_hdtr struct for
1283 * any headers/trailers.
1286 error = copyin(uap->hdtr, &hdtr, sizeof(hdtr));
1293 error = iovec_copyin(hdtr.headers, &iov, aiov,
1294 hdtr.hdr_cnt, &auio.uio_resid);
1298 auio.uio_iovcnt = hdtr.hdr_cnt;
1299 auio.uio_offset = 0;
1300 auio.uio_segflg = UIO_USERSPACE;
1301 auio.uio_rw = UIO_WRITE;
1304 error = kern_sendmsg(uap->s, NULL, &auio, NULL, 0,
1307 iovec_free(&iov, aiov);
1314 error = kern_sendfile(vp, uap->s, uap->offset, uap->nbytes,
1315 &sbytes, uap->flags);
1320 * Send trailers. Wimp out and use writev(2).
1322 if (uap->hdtr != NULL && hdtr.trailers != NULL) {
1323 error = iovec_copyin(hdtr.trailers, &iov, aiov,
1324 hdtr.trl_cnt, &auio.uio_resid);
1328 auio.uio_iovcnt = hdtr.trl_cnt;
1329 auio.uio_offset = 0;
1330 auio.uio_segflg = UIO_USERSPACE;
1331 auio.uio_rw = UIO_WRITE;
1334 error = kern_sendmsg(uap->s, NULL, &auio, NULL, 0, &res);
1336 iovec_free(&iov, aiov);
1343 if (uap->sbytes != NULL) {
1344 sbytes += hdtr_size;
1345 copyout(&sbytes, uap->sbytes, sizeof(off_t));
1353 kern_sendfile(struct vnode *vp, int s, off_t offset, size_t nbytes,
1354 off_t *sbytes, int flags)
1356 struct thread *td = curthread;
1357 struct proc *p = td->td_proc;
1358 struct vm_object *obj;
1367 if (vp->v_type != VREG || VOP_GETVOBJECT(vp, &obj) != 0) {
1371 error = holdsock(p->p_fd, s, &fp);
1374 so = (struct socket *)fp->f_data;
1375 if (so->so_type != SOCK_STREAM) {
1379 if ((so->so_state & SS_ISCONNECTED) == 0) {
1390 * Protect against multiple writers to the socket.
1392 (void) sblock(&so->so_snd, M_WAITOK);
1395 * Loop through the pages in the file, starting with the requested
1396 * offset. Get a file page (do I/O if necessary), map the file page
1397 * into an sf_buf, attach an mbuf header to the sf_buf, and queue
1400 for (off = offset; ; off += xfsize, *sbytes += xfsize) {
1404 pindex = OFF_TO_IDX(off);
1407 * Calculate the amount to transfer. Not to exceed a page,
1408 * the EOF, or the passed in nbytes.
1410 xfsize = obj->un_pager.vnp.vnp_size - off;
1411 if (xfsize > PAGE_SIZE)
1413 pgoff = (vm_offset_t)(off & PAGE_MASK);
1414 if (PAGE_SIZE - pgoff < xfsize)
1415 xfsize = PAGE_SIZE - pgoff;
1416 if (nbytes && xfsize > (nbytes - *sbytes))
1417 xfsize = nbytes - *sbytes;
1421 * Optimize the non-blocking case by looking at the socket space
1422 * before going to the extra work of constituting the sf_buf.
1424 if ((so->so_state & SS_NBIO) && sbspace(&so->so_snd) <= 0) {
1425 if (so->so_state & SS_CANTSENDMORE)
1429 sbunlock(&so->so_snd);
1433 * Attempt to look up the page.
1435 * Allocate if not found
1437 * Wait and loop if busy.
1439 pg = vm_page_lookup(obj, pindex);
1442 pg = vm_page_alloc(obj, pindex, VM_ALLOC_NORMAL);
1448 } else if (vm_page_sleep_busy(pg, TRUE, "sfpbsy")) {
1453 * Wire the page so it does not get ripped out from under
1460 * If page is not valid for what we need, initiate I/O
1463 if (!pg->valid || !vm_page_is_valid(pg, pgoff, xfsize)) {
1469 * Ensure that our page is still around when the I/O
1472 vm_page_io_start(pg);
1475 * Get the page from backing store.
1477 bsize = vp->v_mount->mnt_stat.f_iosize;
1478 auio.uio_iov = &aiov;
1479 auio.uio_iovcnt = 1;
1481 aiov.iov_len = MAXBSIZE;
1482 auio.uio_resid = MAXBSIZE;
1483 auio.uio_offset = trunc_page(off);
1484 auio.uio_segflg = UIO_NOCOPY;
1485 auio.uio_rw = UIO_READ;
1487 vn_lock(vp, NULL, LK_SHARED | LK_NOPAUSE | LK_RETRY, td);
1488 error = VOP_READ(vp, &auio,
1489 IO_VMIO | ((MAXBSIZE / bsize) << 16),
1491 VOP_UNLOCK(vp, NULL, 0, td);
1492 vm_page_flag_clear(pg, PG_ZERO);
1493 vm_page_io_finish(pg);
1495 vm_page_unwire(pg, 0);
1497 * See if anyone else might know about this page.
1498 * If not and it is not valid, then free it.
1500 if (pg->wire_count == 0 && pg->valid == 0 &&
1501 pg->busy == 0 && !(pg->flags & PG_BUSY) &&
1502 pg->hold_count == 0) {
1506 sbunlock(&so->so_snd);
1513 * Get a sendfile buf. We usually wait as long as necessary,
1514 * but this wait can be interrupted.
1516 if ((sf = sf_buf_alloc(pg)) == NULL) {
1518 vm_page_unwire(pg, 0);
1519 if (pg->wire_count == 0 && pg->object == NULL)
1522 sbunlock(&so->so_snd);
1528 * Get an mbuf header and set it up as having external storage.
1530 MGETHDR(m, M_WAIT, MT_DATA);
1533 sf_buf_free((void *)sf->kva, PAGE_SIZE);
1534 sbunlock(&so->so_snd);
1537 m->m_ext.ext_free = sf_buf_free;
1538 m->m_ext.ext_ref = sf_buf_ref;
1539 m->m_ext.ext_buf = (void *)sf->kva;
1540 m->m_ext.ext_size = PAGE_SIZE;
1541 m->m_data = (char *) sf->kva + pgoff;
1542 m->m_flags |= M_EXT;
1543 m->m_pkthdr.len = m->m_len = xfsize;
1545 * Add the buffer to the socket buffer chain.
1550 * Make sure that the socket is still able to take more data.
1551 * CANTSENDMORE being true usually means that the connection
1552 * was closed. so_error is true when an error was sensed after
1554 * The state is checked after the page mapping and buffer
1555 * allocation above since those operations may block and make
1556 * any socket checks stale. From this point forward, nothing
1557 * blocks before the pru_send (or more accurately, any blocking
1558 * results in a loop back to here to re-check).
1560 if ((so->so_state & SS_CANTSENDMORE) || so->so_error) {
1561 if (so->so_state & SS_CANTSENDMORE) {
1564 error = so->so_error;
1568 sbunlock(&so->so_snd);
1573 * Wait for socket space to become available. We do this just
1574 * after checking the connection state above in order to avoid
1575 * a race condition with sbwait().
1577 if (sbspace(&so->so_snd) < so->so_snd.sb_lowat) {
1578 if (so->so_state & SS_NBIO) {
1580 sbunlock(&so->so_snd);
1585 error = sbwait(&so->so_snd);
1587 * An error from sbwait usually indicates that we've
1588 * been interrupted by a signal. If we've sent anything
1589 * then return bytes sent, otherwise return the error.
1593 sbunlock(&so->so_snd);
1600 (*so->so_proto->pr_usrreqs->pru_send)(so, 0, m, 0, 0, td);
1603 sbunlock(&so->so_snd);
1607 sbunlock(&so->so_snd);