cloudabi64_sock.c revision 286680 
1/*-
2 * Copyright (c) 2015 Nuxi, https://nuxi.nl/
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 * SUCH DAMAGE.
24 */
25
26#include <sys/cdefs.h>
27__FBSDID("$FreeBSD: head/sys/compat/cloudabi64/cloudabi64_sock.c 286680 2015-08-12 17:42:20Z ed $");
28
29#include <sys/param.h>
30#include <sys/kernel.h>
31#include <sys/malloc.h>
32#include <sys/proc.h>
33#include <sys/socket.h>
34#include <sys/syscallsubr.h>
35#include <sys/systm.h>
36#include <sys/uio.h>
37
38#include <compat/cloudabi/cloudabi_util.h>
39
40#include <compat/cloudabi64/cloudabi64_syscalldefs.h>
41#include <compat/cloudabi64/cloudabi64_proto.h>
42
43static MALLOC_DEFINE(M_SOCKET, "socket", "CloudABI socket");
44
45int
46cloudabi64_sys_sock_recv(struct thread *td,
47    struct cloudabi64_sys_sock_recv_args *uap)
48{
49	struct sockaddr_storage ss;
50	cloudabi64_recv_in_t ri;
51	cloudabi64_recv_out_t ro = {};
52	cloudabi64_iovec_t iovobj;
53	struct msghdr msghdr = {};
54	size_t i;
55	int error;
56
57	error = copyin(uap->in, &ri, sizeof(ri));
58	if (error != 0)
59		return (error);
60
61	/* Convert results in cloudabi_recv_in_t to struct msghdr. */
62	if (ri.ri_datalen > UIO_MAXIOV)
63		return (EINVAL);
64	msghdr.msg_iovlen = ri.ri_datalen;
65	msghdr.msg_iov = malloc(msghdr.msg_iovlen * sizeof(struct iovec),
66	    M_SOCKET, M_WAITOK);
67	for (i = 0; i < msghdr.msg_iovlen; i++) {
68		error = copyin(&((cloudabi64_iovec_t *)ri.ri_data)[i], &iovobj,
69		    sizeof(iovobj));
70		if (error != 0) {
71			free(msghdr.msg_iov, M_SOCKET);
72			return (error);
73		}
74		msghdr.msg_iov[i].iov_base = (void *)iovobj.iov_base;
75		msghdr.msg_iov[i].iov_len = iovobj.iov_len;
76	}
77	msghdr.msg_name = &ss;
78	msghdr.msg_namelen = sizeof(ss);
79	if (ri.ri_flags & CLOUDABI_MSG_PEEK)
80		msghdr.msg_flags |= MSG_PEEK;
81	if (ri.ri_flags & CLOUDABI_MSG_WAITALL)
82		msghdr.msg_flags |= MSG_WAITALL;
83
84	/* TODO(ed): Add file descriptor passing. */
85	error = kern_recvit(td, uap->s, &msghdr, UIO_SYSSPACE, NULL);
86	free(msghdr.msg_iov, M_SOCKET);
87	if (error != 0)
88		return (error);
89
90	/* Convert results in msghdr to cloudabi_recv_out_t. */
91	ro.ro_datalen = td->td_retval[0];
92	cloudabi_convert_sockaddr((struct sockaddr *)&ss,
93	    MIN(msghdr.msg_namelen, sizeof(ss)), &ro.ro_peername);
94	td->td_retval[0] = 0;
95	return (copyout(&ro, uap->out, sizeof(ro)));
96}
97
98int
99cloudabi64_sys_sock_send(struct thread *td,
100    struct cloudabi64_sys_sock_send_args *uap)
101{
102	cloudabi64_send_in_t si;
103	cloudabi64_send_out_t so = {};
104	cloudabi64_ciovec_t iovobj;
105	struct msghdr msghdr = {};
106	size_t i;
107	int error, flags;
108
109	error = copyin(uap->in, &si, sizeof(si));
110	if (error != 0)
111		return (error);
112
113	/* Convert results in cloudabi_send_in_t to struct msghdr. */
114	if (si.si_datalen > UIO_MAXIOV)
115		return (EINVAL);
116	msghdr.msg_iovlen = si.si_datalen;
117	msghdr.msg_iov = malloc(msghdr.msg_iovlen * sizeof(struct iovec),
118	    M_SOCKET, M_WAITOK);
119	for (i = 0; i < msghdr.msg_iovlen; i++) {
120		error = copyin(&((cloudabi64_ciovec_t *)si.si_data)[i], &iovobj,
121		    sizeof(iovobj));
122		if (error != 0) {
123			free(msghdr.msg_iov, M_SOCKET);
124			return (error);
125		}
126		msghdr.msg_iov[i].iov_base = (void *)iovobj.iov_base;
127		msghdr.msg_iov[i].iov_len = iovobj.iov_len;
128	}
129
130	flags = MSG_NOSIGNAL;
131	if (si.si_flags & CLOUDABI_MSG_EOR)
132		flags |= MSG_EOR;
133
134	/* TODO(ed): Add file descriptor passing. */
135	error = kern_sendit(td, uap->s, &msghdr, flags, NULL, UIO_USERSPACE);
136	free(msghdr.msg_iov, M_SOCKET);
137	if (error != 0)
138		return (error);
139
140	/* Convert results in msghdr to cloudabi_send_out_t. */
141	so.so_datalen = td->td_retval[0];
142	td->td_retval[0] = 0;
143	return (copyout(&so, uap->out, sizeof(so)));
144}
145