1 /* $NetBSD: linux_socketcall.c,v 1.45 2014/11/09 17:48:08 maxv 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 1.45 2014/11/09 17:48:08 maxv 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: 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. */ 87 static 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 linux_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 linux_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 #undef L 111 }; 112 113 /* 114 * Entry point to all Linux socket calls. Just check which call to 115 * make and take appropriate action. 116 */ 117 int 118 linux_sys_socketcall(struct lwp *l, const struct linux_sys_socketcall_args *uap, register_t *retval) 119 { 120 /* { 121 syscallarg(int) what; 122 syscallarg(void *) args; 123 } */ 124 struct linux_socketcall_dummy_args lda; 125 int error; 126 127 if (SCARG(uap, what) <= 0 || SCARG(uap, what) > LINUX_MAX_SOCKETCALL) 128 return ENOSYS; 129 130 if ((error = copyin(SCARG(uap, args), &lda, 131 linux_socketcall[SCARG(uap, what)].argsize))) { 132 DPRINTF(("copyin for %s failed %d\n", 133 linux_socketcall[SCARG(uap, what)].name, error)); 134 return error; 135 } 136 137 ktrkuser(linux_socketcall[SCARG(uap, what)].name, &lda, 138 linux_socketcall[SCARG(uap, what)].argsize); 139 140 #ifdef DEBUG_LINUX 141 /* dump the passed argument data */ 142 { 143 DPRINTF(("linux_socketcall('%s'): ", 144 linux_socketcall[SCARG(uap, what)].name)); 145 146 if (SCARG(uap, what) == LINUX_SYS_SOCKET) { 147 DPRINTF(("[dom %d type %d proto %d]\n", 148 lda.dummy_ints[0], 149 lda.dummy_ints[1], 150 lda.dummy_ints[2])); 151 } else { 152 int i, sz; 153 u_int8_t *data = (u_int8_t *)&lda.dummy_ints[1]; 154 155 sz = linux_socketcall[SCARG(uap, what)].argsize 156 - sizeof(lda.dummy_ints[0]); 157 158 DPRINTF(("socket %d [", lda.dummy_ints[0])); 159 for(i=0; i < sz; i++) 160 DPRINTF(("%02x ", data[i])); 161 DPRINTF(("]\n")); 162 } 163 } 164 #endif 165 166 switch (SCARG(uap, what)) { 167 case LINUX_SYS_SOCKET: 168 error = linux_sys_socket(l, (void *)&lda, retval); 169 break; 170 case LINUX_SYS_BIND: 171 error = linux_sys_bind(l, (void *)&lda, retval); 172 break; 173 case LINUX_SYS_CONNECT: 174 error = linux_sys_connect(l, (void *)&lda, retval); 175 break; 176 case LINUX_SYS_LISTEN: 177 error = sys_listen(l, (void *)&lda, retval); 178 break; 179 case LINUX_SYS_ACCEPT: 180 error = linux_sys_accept(l, (void *)&lda, retval); 181 break; 182 case LINUX_SYS_GETSOCKNAME: 183 error = linux_sys_getsockname(l, (void *)&lda, retval); 184 break; 185 case LINUX_SYS_GETPEERNAME: 186 error = linux_sys_getpeername(l, (void *)&lda, retval); 187 break; 188 case LINUX_SYS_SOCKETPAIR: 189 error = linux_sys_socketpair(l, (void *)&lda, retval); 190 break; 191 case LINUX_SYS_SEND: 192 error = linux_sys_send(l, (void *)&lda, retval); 193 break; 194 case LINUX_SYS_RECV: 195 error = linux_sys_recv(l, (void *)&lda, retval); 196 break; 197 case LINUX_SYS_SENDTO: 198 error = linux_sys_sendto(l, (void *)&lda, retval); 199 break; 200 case LINUX_SYS_RECVFROM: 201 error = linux_sys_recvfrom(l, (void *)&lda, retval); 202 break; 203 case LINUX_SYS_SHUTDOWN: 204 error = sys_shutdown(l, (void *)&lda, retval); 205 break; 206 case LINUX_SYS_SETSOCKOPT: 207 error = linux_sys_setsockopt(l, (void *)&lda, retval); 208 break; 209 case LINUX_SYS_GETSOCKOPT: 210 error = linux_sys_getsockopt(l, (void *)&lda, retval); 211 break; 212 case LINUX_SYS_SENDMSG: 213 error = linux_sys_sendmsg(l, (void *)&lda, retval); 214 break; 215 case LINUX_SYS_RECVMSG: 216 error = linux_sys_recvmsg(l, (void *)&lda, retval); 217 break; 218 default: 219 error = ENOSYS; 220 break; 221 } 222 223 DPRINTF(("sys_%s() = %d\n", linux_socketcall[SCARG(uap, what)].name, 224 error)); 225 return error; 226 } 227