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Differential D16561 Diff 46166 sys/compat/freebsd32/freebsd32_misc.c

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sys/compat/freebsd32/freebsd32_misc.c

Show First 20 Lines • Show All 1,127 Lines • ▼ Show 20 Linesfreebsd32_copy_msg_out(struct msghdr *msg, struct mbuf *control)
int len, maxlen, copylen; int len, maxlen, copylen;
struct mbuf *m; struct mbuf *m;
error = 0; error = 0;
len = msg->msg_controllen; len = msg->msg_controllen;
maxlen = msg->msg_controllen; maxlen = msg->msg_controllen;
msg->msg_controllen = 0; msg->msg_controllen = 0;
m = control;
ctlbuf = msg->msg_control; ctlbuf = msg->msg_control;
for (m = control; m != NULL && len > 0; m = m->m_next) {
while (m && len > 0) {
cm = mtod(m, struct cmsghdr *); cm = mtod(m, struct cmsghdr *);
clen = m->m_len; clen = m->m_len;
while (cm != NULL) { while (cm != NULL) {
if (sizeof(struct cmsghdr) > clen || if (sizeof(struct cmsghdr) > clen ||
cm->cmsg_len > clen) { cm->cmsg_len > clen) {
error = EINVAL; error = EINVAL;
break; break;
} }
data = CMSG_DATA(cm); data = CMSG_DATA(cm);
datalen = (caddr_t)cm + cm->cmsg_len - (caddr_t)data; datalen = (caddr_t)cm + cm->cmsg_len - (caddr_t)data;
datalen_out = freebsd32_cmsg_convert(cm, data, datalen); datalen_out = freebsd32_cmsg_convert(cm, data, datalen);
/* Adjust message length */ /* Adjust message length */
cm->cmsg_len = FREEBSD32_ALIGN(sizeof(struct cmsghdr)) + cm->cmsg_len = FREEBSD32_ALIGN(sizeof(struct cmsghdr)) +
datalen_out; datalen_out;
/* Copy cmsghdr */ /* Copy cmsghdr */
copylen = sizeof(struct cmsghdr); copylen = sizeof(struct cmsghdr);
if (len < copylen) { if (len < copylen) {
msg->msg_flags |= MSG_CTRUNC; msg->msg_flags |= MSG_CTRUNC;
copylen = len; m_dispose_extcontrolm(m);
goto exit;
} }
error = copyout(cm, ctlbuf, copylen); error = copyout(cm, ctlbuf, copylen);
if (error) if (error)
goto exit; goto exit;
ctlbuf += FREEBSD32_ALIGN(copylen); ctlbuf += FREEBSD32_ALIGN(copylen);
len -= FREEBSD32_ALIGN(copylen); len -= FREEBSD32_ALIGN(copylen);
if (len <= 0) if (len <= 0)
break; break;
/* Copy data */ /* Copy data */
copylen = datalen_out; copylen = datalen_out;
if (len < copylen) { if (len < copylen) {
msg->msg_flags |= MSG_CTRUNC; msg->msg_flags |= MSG_CTRUNC;
copylen = len; m_dispose_extcontrolm(m);
goto exit;
} }
error = copyout(data, ctlbuf, copylen); error = copyout(data, ctlbuf, copylen);
if (error) if (error)
goto exit; goto exit;
ctlbuf += FREEBSD32_ALIGN(copylen); ctlbuf += FREEBSD32_ALIGN(copylen);
len -= FREEBSD32_ALIGN(copylen); len -= FREEBSD32_ALIGN(copylen);
if (CMSG_SPACE(datalen) < clen) { if (CMSG_SPACE(datalen) < clen) {
clen -= CMSG_SPACE(datalen); clen -= CMSG_SPACE(datalen);
cm = (struct cmsghdr *) cm = (struct cmsghdr *)
((caddr_t)cm + CMSG_SPACE(datalen)); ((caddr_t)cm + CMSG_SPACE(datalen));
} else { } else {
clen = 0; clen = 0;
cm = NULL; cm = NULL;
} }
} }
m = m->m_next; msg->msg_controllen = (len <= 0) ? maxlen :
edUnsubmitted
Done
Inline Actions

Nit: extraneous parentheses.

ed: Nit: extraneous parentheses.
ctlbuf - (caddr_t)msg->msg_control;
} }
msg->msg_controllen = (len <= 0) ? maxlen : ctlbuf - (caddr_t)msg->msg_control;
exit: exit:
return (error); return (error);
} }
int int
freebsd32_recvmsg(td, uap) freebsd32_recvmsg(td, uap)
struct thread *td; struct thread *td;
struct freebsd32_recvmsg_args /* { struct freebsd32_recvmsg_args /* {
int s; int s;
struct msghdr32 *msg; struct msghdr32 *msg;
Show All 20 Linesfreebsd32_recvmsg(td, uap)
msg.msg_flags = uap->flags; msg.msg_flags = uap->flags;
uiov = msg.msg_iov; uiov = msg.msg_iov;
msg.msg_iov = iov; msg.msg_iov = iov;
controlp = (msg.msg_control != NULL) ? &control : NULL; controlp = (msg.msg_control != NULL) ? &control : NULL;
error = kern_recvit(td, uap->s, &msg, UIO_USERSPACE, controlp); error = kern_recvit(td, uap->s, &msg, UIO_USERSPACE, controlp);
if (error == 0) { if (error == 0) {
msg.msg_iov = uiov; msg.msg_iov = uiov;
if (control != NULL) if (control != NULL)
error = freebsd32_copy_msg_out(&msg, control); error = freebsd32_copy_msg_out(&msg, control);
else else
msg.msg_controllen = 0; msg.msg_controllen = 0;
if (error == 0) if (error == 0)
error = freebsd32_copyoutmsghdr(&msg, uap->msg); error = freebsd32_copyoutmsghdr(&msg, uap->msg);
} }
free(iov, M_IOV); free(iov, M_IOV);
if (control != NULL) if (control != NULL)
m_freem(control); m_freem(control);
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