2 * 43BSD_SOCKET.C - 4.3BSD compatibility socket syscalls
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35 * $DragonFly: src/sys/emulation/43bsd/43bsd_socket.c,v 1.10 2007/01/28 06:31:00 y0netan1 Exp $
36 * from: DragonFly kern/uipc_syscalls.c,v 1.13
38 * The original versions of these syscalls used to live in
39 * kern/uipc_syscalls.c. These are heavily modified to use the
43 #include "opt_compat.h"
45 #include <sys/param.h>
46 #include <sys/systm.h>
47 #include <sys/kernel.h>
48 #include <sys/sysproto.h>
49 #include <sys/kern_syscall.h>
50 #include <sys/malloc.h>
53 #include <sys/socket.h>
54 #include <sys/socketvar.h>
57 #include "43bsd_socket.h"
60 * System call interface to the socket abstraction.
64 compat_43_getsockaddr(struct sockaddr **namp, caddr_t uaddr, size_t len)
70 if (len > SOCK_MAXADDRLEN)
72 if (len < offsetof(struct sockaddr, sa_data[0]))
74 MALLOC(sa, struct sockaddr *, len, M_SONAME, M_WAITOK);
75 error = copyin(uaddr, sa, len);
80 * Convert to the 4.4BSD sockaddr structure.
82 sa->sa_family = sa->sa_len;
90 compat_43_copyout_sockaddr(struct sockaddr *sa, caddr_t uaddr, int sa_len)
94 ((struct osockaddr *)sa)->sa_family = sa->sa_family;
95 error = copyout(sa, uaddr, sa_len);
101 sys_oaccept(struct accept_args *uap)
103 struct sockaddr *sa = NULL;
108 error = copyin(uap->anamelen, &sa_len, sizeof(sa_len));
112 error = kern_accept(uap->s, 0, &sa, &sa_len,
113 &uap->sysmsg_iresult);
117 * return a namelen of zero for older code which
118 * might ignore the return value from accept.
121 copyout(&sa_len, uap->anamelen, sizeof(*uap->anamelen));
123 compat_43_copyout_sockaddr(sa, uap->name, sa_len);
125 error = copyout(&sa_len, uap->anamelen,
126 sizeof(*uap->anamelen));
132 error = kern_accept(uap->s, 0, NULL, 0, &uap->sysmsg_iresult);
138 sys_ogetsockname(struct getsockname_args *uap)
140 struct sockaddr *sa = NULL;
143 error = copyin(uap->alen, &sa_len, sizeof(sa_len));
147 error = kern_getsockname(uap->fdes, &sa, &sa_len);
150 error = compat_43_copyout_sockaddr(sa, uap->asa, sa_len);
152 error = copyout(&sa_len, uap->alen, sizeof(*uap->alen));
160 sys_ogetpeername(struct ogetpeername_args *uap)
162 struct sockaddr *sa = NULL;
165 error = copyin(uap->alen, &sa_len, sizeof(sa_len));
169 error = kern_getpeername(uap->fdes, &sa, &sa_len);
172 error = compat_43_copyout_sockaddr(sa, uap->asa, sa_len);
175 error = copyout(&sa_len, uap->alen, sizeof(*uap->alen));
182 sys_osend(struct osend_args *uap)
184 struct thread *td = curthread;
189 aiov.iov_base = uap->buf;
190 aiov.iov_len = uap->len;
191 auio.uio_iov = &aiov;
194 auio.uio_resid = uap->len;
195 auio.uio_segflg = UIO_USERSPACE;
196 auio.uio_rw = UIO_WRITE;
199 error = kern_sendmsg(uap->s, NULL, &auio, NULL, uap->flags,
200 &uap->sysmsg_szresult);
206 sys_osendmsg(struct osendmsg_args *uap)
208 struct thread *td = curthread;
211 struct iovec aiov[UIO_SMALLIOV], *iov = NULL;
212 struct sockaddr *sa = NULL;
213 struct mbuf *control = NULL;
217 error = copyin(uap->msg, (caddr_t)&msg, sizeof (msg));
222 * Conditionally copyin msg.msg_name.
225 error = compat_43_getsockaddr(&sa, msg.msg_name,
234 error = iovec_copyin(msg.msg_iov, &iov, aiov, msg.msg_iovlen,
239 auio.uio_iovcnt = msg.msg_iovlen;
241 auio.uio_segflg = UIO_USERSPACE;
242 auio.uio_rw = UIO_WRITE;
246 * Conditionally copyin msg.msg_control.
248 if (msg.msg_control) {
249 if (msg.msg_controllen < 0 || msg.msg_controllen > MLEN) {
253 control = m_get(MB_WAIT, MT_CONTROL);
254 if (control == NULL) {
258 control->m_len = msg.msg_controllen;
259 error = copyin(msg.msg_control, mtod(control, caddr_t),
266 * In 4.3BSD, the only type of ancillary data was
267 * access rights and this data did not use a header
268 * to identify it's type. Thus, we must prepend the
269 * control data with the proper cmsghdr structure
270 * so that the kernel recognizes it as access rights.
272 M_PREPEND(control, sizeof(*cm), MB_WAIT);
273 if (control == NULL) {
277 cm = mtod(control, struct cmsghdr *);
278 cm->cmsg_len = control->m_len;
279 cm->cmsg_level = SOL_SOCKET;
280 cm->cmsg_type = SCM_RIGHTS;
284 error = kern_sendmsg(uap->s, sa, &auio, control, uap->flags,
285 &uap->sysmsg_szresult);
288 iovec_free(&iov, aiov);
296 sys_orecv(struct orecv_args *uap)
298 struct thread *td = curthread;
303 aiov.iov_base = uap->buf;
304 aiov.iov_len = uap->len;
305 auio.uio_iov = &aiov;
308 auio.uio_resid = uap->len;
309 auio.uio_segflg = UIO_USERSPACE;
310 auio.uio_rw = UIO_READ;
313 error = kern_recvmsg(uap->s, NULL, &auio, NULL, &uap->flags,
314 &uap->sysmsg_szresult);
320 sys_orecvfrom(struct recvfrom_args *uap)
322 struct thread *td = curthread;
325 struct sockaddr *sa = NULL;
328 if (uap->from && uap->fromlenaddr) {
329 error = copyin(uap->fromlenaddr, &fromlen, sizeof(fromlen));
337 aiov.iov_base = uap->buf;
338 aiov.iov_len = uap->len;
339 auio.uio_iov = &aiov;
342 auio.uio_resid = uap->len;
343 auio.uio_segflg = UIO_USERSPACE;
344 auio.uio_rw = UIO_READ;
347 error = kern_recvmsg(uap->s, uap->from ? &sa : NULL, &auio, NULL,
348 &uap->flags, &uap->sysmsg_szresult);
350 if (error == 0 && uap->from) {
352 fromlen = MIN(fromlen, sa->sa_len);
353 error = compat_43_copyout_sockaddr(sa, uap->from,
359 * Old recvfrom didn't signal an error if this
360 * next copyout failed.
362 copyout(&fromlen, uap->fromlenaddr, sizeof(fromlen));
371 sys_orecvmsg(struct orecvmsg_args *uap)
373 struct thread *td = curthread;
376 struct iovec aiov[UIO_SMALLIOV], *iov = NULL;
377 struct mbuf *m, *control = NULL;
378 struct sockaddr *sa = NULL;
380 socklen_t *ufromlenp, *ucontrollenp;
381 int error, fromlen, controllen, len, flags, *uflagsp;
384 * This copyin handles everything except the iovec.
386 error = copyin(uap->msg, &msg, sizeof(struct omsghdr));
390 if (msg.msg_name && msg.msg_namelen < 0)
392 if (msg.msg_control && msg.msg_controllen < 0)
395 ufromlenp = (socklen_t *)((caddr_t)uap->msg + offsetof(struct msghdr,
397 ucontrollenp = (socklen_t *)((caddr_t)uap->msg + offsetof(struct msghdr,
399 uflagsp = (int *)((caddr_t)uap->msg + offsetof(struct msghdr,
405 error = iovec_copyin(msg.msg_iov, &iov, aiov, msg.msg_iovlen,
410 auio.uio_iovcnt = msg.msg_iovlen;
412 auio.uio_segflg = UIO_USERSPACE;
413 auio.uio_rw = UIO_READ;
416 flags = msg.msg_flags;
418 error = kern_recvmsg(uap->s, (msg.msg_name ? &sa : NULL), &auio,
419 (msg.msg_control ? &control : NULL), &flags,
420 &uap->sysmsg_szresult);
423 * Copyout msg.msg_name and msg.msg_namelen.
425 if (error == 0 && msg.msg_name) {
427 fromlen = MIN(msg.msg_namelen, sa->sa_len);
428 error = compat_43_copyout_sockaddr(sa, msg.msg_name,
434 * Old recvfrom didn't signal an error if this
435 * next copyout failed.
437 copyout(&fromlen, ufromlenp, sizeof(*ufromlenp));
441 * Copyout msg.msg_control and msg.msg_controllen.
443 if (error == 0 && msg.msg_control) {
445 * If we receive access rights, trim the cmsghdr; anything
448 if (mtod((struct mbuf *)msg.msg_control,
449 struct cmsghdr *)->cmsg_level != SOL_SOCKET ||
450 mtod((struct mbuf *)msg.msg_control,
451 struct cmsghdr *)->cmsg_type != SCM_RIGHTS) {
453 error = copyout(&temp, ucontrollenp,
454 sizeof(*ucontrollenp));
457 ((struct mbuf *)msg.msg_control)->m_len -=
458 sizeof(struct cmsghdr);
459 ((struct mbuf *)msg.msg_control)->m_data +=
460 sizeof(struct cmsghdr);
462 len = msg.msg_controllen;
464 ctlbuf = (caddr_t)msg.msg_control;
466 while(m && len > 0) {
469 if (len >= m->m_len) {
472 msg.msg_flags |= MSG_CTRUNC;
476 error = copyout(mtod(m, caddr_t), ctlbuf,
485 controllen = ctlbuf - (caddr_t)msg.msg_control;
486 error = copyout(&controllen, ucontrollenp,
487 sizeof(*ucontrollenp));
491 error = copyout(&flags, uflagsp, sizeof(*uflagsp));
496 iovec_free(&iov, aiov);