1/* $NetBSD: linux_socketcall.c,v 1.49 2021/09/23 06:56:27 ryo Exp $ */ 2 3/*- 4 * Copyright (c) 1995, 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Frank van der Linden and Eric Haszlakiewicz. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32#include <sys/cdefs.h> 33__KERNEL_RCSID(0, "$NetBSD: linux_socketcall.c,v 1.49 2021/09/23 06:56:27 ryo Exp $"); 34 35#include <sys/param.h> 36#include <sys/kernel.h> 37#include <sys/systm.h> 38#include <sys/buf.h> 39#include <sys/ioctl.h> 40#include <sys/tty.h> 41#include <sys/file.h> 42#include <sys/filedesc.h> 43#include <sys/select.h> 44#include <sys/socket.h> 45#include <sys/socketvar.h> 46#include <net/if.h> 47#include <netinet/in.h> 48#include <netinet/tcp.h> 49#include <sys/mount.h> 50#include <sys/proc.h> 51#include <sys/vnode.h> 52#include <sys/device.h> 53#include <sys/ktrace.h> 54 55#include <sys/syscallargs.h> 56 57#include <compat/sys/socket.h> 58 59#include <compat/linux/common/linux_types.h> 60#include <compat/linux/common/linux_util.h> 61#include <compat/linux/common/linux_signal.h> 62#include <compat/linux/common/linux_ioctl.h> 63#include <compat/linux/common/linux_socket.h> 64#include <compat/linux/common/linux_socketcall.h> 65#include <compat/linux/common/linux_sockio.h> 66 67#include <compat/linux/linux_syscallargs.h> 68 69#undef DPRINTF 70#ifdef DEBUG_LINUX 71#define DPRINTF(a) uprintf a 72#else 73#define DPRINTF(a) 74#endif 75 76/* Used on: arm, i386, m68k, mips, ppc, sparc, sparc64 */ 77/* Not used on: aarch64, alpha, amd64 */ 78 79/* 80 * This file contains the linux_socketcall() multiplexer. Arguments 81 * for the various socket calls are on the user stack. A pointer 82 * to them is the only thing that is passed. We copyin the arguments 83 * here so the individual functions can assume they are normal syscalls. 84 */ 85 86/* The sizes of the arguments. Used for copyin. */ 87static const struct { 88 const char *name; 89 int argsize; 90} linux_socketcall[LINUX_MAX_SOCKETCALL+1] = { 91#define L(a) "linux/" a 92 {L("invalid"), -1}, /* 0 */ 93 {L("socket"), sizeof(struct linux_sys_socket_args)}, /* 1 */ 94 {L("bind"), sizeof(struct linux_sys_bind_args)}, /* 2 */ 95 {L("connect"), sizeof(struct linux_sys_connect_args)}, /* 3 */ 96 {L("listen"), sizeof(struct sys_listen_args)}, /* 4 */ 97 {L("accept"), sizeof(struct linux_sys_accept_args)}, /* 5 */ 98 {L("getsockname"),sizeof(struct linux_sys_getsockname_args)}, /* 6 */ 99 {L("getpeername"),sizeof(struct linux_sys_getpeername_args)}, /* 7 */ 100 {L("socketpair"),sizeof(struct linux_sys_socketpair_args)}, /* 8 */ 101 {L("send"), sizeof(struct linux_sys_send_args)}, /* 9 */ 102 {L("recv"), sizeof(struct linux_sys_recv_args)}, /* 10 */ 103 {L("sendto"), sizeof(struct linux_sys_sendto_args)}, /* 11 */ 104 {L("recvfrom"), sizeof(struct linux_sys_recvfrom_args)}, /* 12 */ 105 {L("shutdown"), sizeof(struct sys_shutdown_args)}, /* 13 */ 106 {L("setsockopt"),sizeof(struct linux_sys_setsockopt_args)}, /* 14 */ 107 {L("getsockopt"),sizeof(struct linux_sys_getsockopt_args)}, /* 15 */ 108 {L("sendmsg"), sizeof(struct linux_sys_sendmsg_args)}, /* 16 */ 109 {L("recvmsg"), sizeof(struct linux_sys_recvmsg_args)}, /* 17 */ 110 {L("accept4"), sizeof(struct linux_sys_accept4_args)}, /* 18 */ 111#undef L 112}; 113 114/* 115 * Entry point to all Linux socket calls. Just check which call to 116 * make and take appropriate action. 117 */ 118int 119linux_sys_socketcall(struct lwp *l, const struct linux_sys_socketcall_args *uap, register_t *retval) 120{ 121 /* { 122 syscallarg(int) what; 123 syscallarg(void *) args; 124 } */ 125 struct linux_socketcall_dummy_args lda; 126 int error; 127 128 if (SCARG(uap, what) <= 0 || SCARG(uap, what) > LINUX_MAX_SOCKETCALL) 129 return ENOSYS; 130 131 if ((error = copyin(SCARG(uap, args), &lda, 132 linux_socketcall[SCARG(uap, what)].argsize))) { 133 DPRINTF(("copyin for %s failed %d\n", 134 linux_socketcall[SCARG(uap, what)].name, error)); 135 return error; 136 } 137 138 ktrkuser(linux_socketcall[SCARG(uap, what)].name, &lda, 139 linux_socketcall[SCARG(uap, what)].argsize); 140 141#ifdef DEBUG_LINUX 142 /* dump the passed argument data */ 143 { 144 DPRINTF(("linux_socketcall('%s'): ", 145 linux_socketcall[SCARG(uap, what)].name)); 146 147 if (SCARG(uap, what) == LINUX_SYS_SOCKET) { 148 DPRINTF(("[dom %d type %d proto %d]\n", 149 lda.dummy_ints[0], 150 lda.dummy_ints[1], 151 lda.dummy_ints[2])); 152 } else { 153 int i, sz; 154 u_int8_t *data = (u_int8_t *)&lda.dummy_ints[1]; 155 156 sz = linux_socketcall[SCARG(uap, what)].argsize 157 - sizeof(lda.dummy_ints[0]); 158 159 DPRINTF(("socket %d [", lda.dummy_ints[0])); 160 for(i=0; i < sz; i++) 161 DPRINTF(("%02x ", data[i])); 162 DPRINTF(("]\n")); 163 } 164 } 165#endif 166 167 switch (SCARG(uap, what)) { 168 case LINUX_SYS_SOCKET: 169 error = linux_sys_socket(l, (void *)&lda, retval); 170 break; 171 case LINUX_SYS_BIND: 172 error = linux_sys_bind(l, (void *)&lda, retval); 173 break; 174 case LINUX_SYS_CONNECT: 175 error = linux_sys_connect(l, (void *)&lda, retval); 176 break; 177 case LINUX_SYS_LISTEN: 178 error = sys_listen(l, (void *)&lda, retval); 179 break; 180 case LINUX_SYS_ACCEPT: 181 error = linux_sys_accept(l, (void *)&lda, retval); 182 break; 183 case LINUX_SYS_GETSOCKNAME: 184 error = linux_sys_getsockname(l, (void *)&lda, retval); 185 break; 186 case LINUX_SYS_GETPEERNAME: 187 error = linux_sys_getpeername(l, (void *)&lda, retval); 188 break; 189 case LINUX_SYS_SOCKETPAIR: 190 error = linux_sys_socketpair(l, (void *)&lda, retval); 191 break; 192 case LINUX_SYS_SEND: 193 error = linux_sys_send(l, (void *)&lda, retval); 194 break; 195 case LINUX_SYS_RECV: 196 error = linux_sys_recv(l, (void *)&lda, retval); 197 break; 198 case LINUX_SYS_SENDTO: 199 error = linux_sys_sendto(l, (void *)&lda, retval); 200 break; 201 case LINUX_SYS_RECVFROM: 202 error = linux_sys_recvfrom(l, (void *)&lda, retval); 203 break; 204 case LINUX_SYS_SHUTDOWN: 205 error = sys_shutdown(l, (void *)&lda, retval); 206 break; 207 case LINUX_SYS_SETSOCKOPT: 208 error = linux_sys_setsockopt(l, (void *)&lda, retval); 209 break; 210 case LINUX_SYS_GETSOCKOPT: 211 error = linux_sys_getsockopt(l, (void *)&lda, retval); 212 break; 213 case LINUX_SYS_SENDMSG: 214 error = linux_sys_sendmsg(l, (void *)&lda, retval); 215 break; 216 case LINUX_SYS_RECVMSG: 217 error = linux_sys_recvmsg(l, (void *)&lda, retval); 218 break; 219 case LINUX_SYS_ACCEPT4: 220 error = linux_sys_accept4(l, (void *)&lda, retval); 221 break; 222 case LINUX_SYS_RECVMMSG: 223 error = linux_sys_recvmmsg(l, (void *)&lda, retval); 224 break; 225 case LINUX_SYS_SENDMMSG: 226 error = linux_sys_sendmmsg(l, (void *)&lda, retval); 227 break; 228 default: 229 error = ENOSYS; 230 break; 231 } 232 233 DPRINTF(("sys_%s() = %d\n", linux_socketcall[SCARG(uap, what)].name, 234 error)); 235 return error; 236} 237