int
sys_recvfrom(struct lwp *l, const struct sys_recvfrom_args *uap,
register_t *retval)
{
/* {
syscallarg(int) s;
syscallarg(void *) buf;
syscallarg(size_t) len;
syscallarg(int) flags;
syscallarg(struct sockaddr *) from;
syscallarg(unsigned int *) fromlenaddr;
} */
struct msghdr msg;
struct iovec aiov;
int error;
struct mbuf *from;
msg.msg_name = NULL;
msg.msg_iov = &aiov;
msg.msg_iovlen = 1;
aiov.iov_base = SCARG(uap, buf);
aiov.iov_len = SCARG(uap, len);
msg.msg_control = NULL;
msg.msg_flags = SCARG(uap, flags) & MSG_USERFLAGS;
error = do_sys_recvmsg(l, SCARG(uap, s), &msg, &from, NULL, retval);
if (error != 0)
return error;
error = copyout_sockname(SCARG(uap, from), SCARG(uap, fromlenaddr),
MSG_LENUSRSPACE, from);
if (from != NULL)
m_free(from);
return error;
}
int
sys_recvmsg(struct lwp *l, const struct sys_recvmsg_args *uap,
register_t *retval)
{
/* {
syscallarg(int) s;
syscallarg(struct msghdr *) msg;
syscallarg(int) flags;
} */
struct msghdr msg;
int error;
struct mbuf *from, *control;
error = copyin(SCARG(uap, msg), &msg, sizeof(msg));
if (error)
return error;
msg.msg_flags = (SCARG(uap, flags) & MSG_USERFLAGS) | MSG_IOVUSRSPACE;
error = do_sys_recvmsg(l, SCARG(uap, s), &msg, &from,
msg.msg_control != NULL ? &control : NULL, retval);
if (error != 0)
return error;
if (msg.msg_control != NULL)
error = copyout_msg_control(l, &msg, control);
if (error == 0)
error = copyout_sockname(msg.msg_name, &msg.msg_namelen, 0,
from);
if (from != NULL)
m_free(from);
if (error == 0) {
ktrkuser("msghdr", &msg, sizeof msg);
error = copyout(&msg, SCARG(uap, msg), sizeof(msg));
}
return error;
}
/*
* This is a brutal clone of compat_43_sys_recvmsg().
*/
int
compat_43_netbsd32_orecvmsg(struct lwp *l, const struct compat_43_netbsd32_orecvmsg_args *uap, register_t *retval)
{
/* {
syscallarg(int) s;
syscallarg(netbsd32_omsghdrp_t) msg;
syscallarg(int) flags;
} */
struct netbsd32_omsghdr omsg;
struct msghdr msg;
struct mbuf *from, *control;
struct iovec *iov, aiov[UIO_SMALLIOV];
int error;
error = copyin(SCARG_P32(uap, msg), &omsg, sizeof (struct omsghdr));
if (error)
return (error);
if (NETBSD32PTR64(omsg.msg_accrights) == NULL)
omsg.msg_accrightslen = 0;
/* it was this way in 4.4BSD */
if (omsg.msg_accrightslen > MLEN)
return EINVAL;
iov = netbsd32_get_iov(NETBSD32PTR64(omsg.msg_iov), omsg.msg_iovlen,
aiov, __arraycount(aiov));
if (iov == NULL)
return EFAULT;
msg.msg_name = NETBSD32PTR64(omsg.msg_name);
msg.msg_namelen = omsg.msg_namelen;
msg.msg_iovlen = omsg.msg_iovlen;
msg.msg_iov = iov;
msg.msg_flags = SCARG(uap, flags) & MSG_USERFLAGS;
error = do_sys_recvmsg(l, SCARG(uap, s), &msg, &from,
NETBSD32PTR64(omsg.msg_accrights) != NULL ? &control : NULL,
retval);
if (error != 0)
return error;
/*
* If there is any control information and it's SCM_RIGHTS,
* pass it back to the program.
* XXX: maybe there can be more than one chunk of control data?
*/
if (NETBSD32PTR64(omsg.msg_accrights) != NULL && control != NULL) {
struct cmsghdr *cmsg = mtod(control, void *);
if (cmsg->cmsg_level == SOL_SOCKET
&& cmsg->cmsg_type == SCM_RIGHTS
&& cmsg->cmsg_len < omsg.msg_accrightslen
&& copyout(CMSG_DATA(cmsg),
NETBSD32PTR64(omsg.msg_accrights),
cmsg->cmsg_len) == 0) {
omsg.msg_accrightslen = cmsg->cmsg_len;
free_control_mbuf(l, control, control->m_next);
} else {
omsg.msg_accrightslen = 0;
free_control_mbuf(l, control, control);
}
} else
