1 /* $NetBSD: netbsd32_socket.c,v 1.6 2001/11/13 02:09:07 lukem Exp $ */ 2 3 /* 4 * Copyright (c) 1998, 2001 Matthew R. Green 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 23 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 25 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #include <sys/cdefs.h> 32 __KERNEL_RCSID(0, "$NetBSD: netbsd32_socket.c,v 1.6 2001/11/13 02:09:07 lukem Exp $"); 33 34 #if defined(_KERNEL_OPT) 35 #include "opt_ktrace.h" 36 #endif 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #define msg __msg /* Don't ask me! */ 41 #include <sys/malloc.h> 42 #include <sys/mount.h> 43 #include <sys/socket.h> 44 #include <sys/sockio.h> 45 #include <sys/socketvar.h> 46 #include <sys/mbuf.h> 47 #include <sys/ktrace.h> 48 #include <sys/file.h> 49 #include <sys/filedesc.h> 50 #include <sys/syscallargs.h> 51 #include <sys/proc.h> 52 53 #include <compat/netbsd32/netbsd32.h> 54 #include <compat/netbsd32/netbsd32_syscallargs.h> 55 #include <compat/netbsd32/netbsd32_conv.h> 56 57 /* note that the netbsd32_msghdr's iov really points to a struct iovec, not a netbsd32_iovec. */ 58 static int recvit32 __P((struct proc *, int, struct netbsd32_msghdr *, struct iovec *, caddr_t, 59 register_t *)); 60 61 int 62 netbsd32_recvmsg(p, v, retval) 63 struct proc *p; 64 void *v; 65 register_t *retval; 66 { 67 struct netbsd32_recvmsg_args /* { 68 syscallarg(int) s; 69 syscallarg(netbsd32_msghdrp_t) msg; 70 syscallarg(int) flags; 71 } */ *uap = v; 72 struct netbsd32_msghdr msg; 73 struct iovec aiov[UIO_SMALLIOV], *uiov, *iov; 74 int error; 75 76 error = copyin((caddr_t)(u_long)SCARG(uap, msg), (caddr_t)&msg, 77 sizeof(msg)); 78 /* netbsd32_msghdr needs the iov pre-allocated */ 79 if (error) 80 return (error); 81 if ((u_int)msg.msg_iovlen > UIO_SMALLIOV) { 82 if ((u_int)msg.msg_iovlen > IOV_MAX) 83 return (EMSGSIZE); 84 MALLOC(iov, struct iovec *, 85 sizeof(struct iovec) * (u_int)msg.msg_iovlen, M_IOV, 86 M_WAITOK); 87 } else if ((u_int)msg.msg_iovlen > 0) 88 iov = aiov; 89 else 90 return (EMSGSIZE); 91 msg.msg_flags = SCARG(uap, flags); 92 uiov = (struct iovec *)(u_long)msg.msg_iov; 93 error = netbsd32_to_iovecin((struct netbsd32_iovec *)uiov, 94 iov, msg.msg_iovlen); 95 if (error) 96 goto done; 97 if ((error = recvit32(p, SCARG(uap, s), &msg, iov, (caddr_t)0, retval)) == 0) { 98 error = copyout((caddr_t)&msg, (caddr_t)(u_long)SCARG(uap, msg), 99 sizeof(msg)); 100 } 101 done: 102 if (iov != aiov) 103 FREE(iov, M_IOV); 104 return (error); 105 } 106 107 int 108 recvit32(p, s, mp, iov, namelenp, retsize) 109 struct proc *p; 110 int s; 111 struct netbsd32_msghdr *mp; 112 struct iovec *iov; 113 caddr_t namelenp; 114 register_t *retsize; 115 { 116 struct file *fp; 117 struct uio auio; 118 int i; 119 int len, error; 120 struct mbuf *from = 0, *control = 0; 121 struct socket *so; 122 #ifdef KTRACE 123 struct iovec *ktriov = NULL; 124 #endif 125 126 /* getsock() will use the descriptor for us */ 127 if ((error = getsock(p->p_fd, s, &fp)) != 0) 128 return (error); 129 auio.uio_iov = iov; 130 auio.uio_iovcnt = mp->msg_iovlen; 131 auio.uio_segflg = UIO_USERSPACE; 132 auio.uio_rw = UIO_READ; 133 auio.uio_procp = p; 134 auio.uio_offset = 0; /* XXX */ 135 auio.uio_resid = 0; 136 for (i = 0; i < mp->msg_iovlen; i++, iov++) { 137 #if 0 138 /* cannot happen iov_len is unsigned */ 139 if (iov->iov_len < 0) { 140 error = EINVAL; 141 goto out1; 142 } 143 #endif 144 /* 145 * Reads return ssize_t because -1 is returned on error. 146 * Therefore we must restrict the length to SSIZE_MAX to 147 * avoid garbage return values. 148 */ 149 auio.uio_resid += iov->iov_len; 150 if (iov->iov_len > SSIZE_MAX || auio.uio_resid > SSIZE_MAX) { 151 error = EINVAL; 152 goto out1; 153 } 154 } 155 #ifdef KTRACE 156 if (KTRPOINT(p, KTR_GENIO)) { 157 int iovlen = auio.uio_iovcnt * sizeof(struct iovec); 158 159 MALLOC(ktriov, struct iovec *, iovlen, M_TEMP, M_WAITOK); 160 memcpy((caddr_t)ktriov, (caddr_t)auio.uio_iov, iovlen); 161 } 162 #endif 163 len = auio.uio_resid; 164 so = (struct socket *)fp->f_data; 165 error = (*so->so_receive)(so, &from, &auio, NULL, 166 mp->msg_control ? &control : NULL, &mp->msg_flags); 167 if (error) { 168 if (auio.uio_resid != len && (error == ERESTART || 169 error == EINTR || error == EWOULDBLOCK)) 170 error = 0; 171 } 172 #ifdef KTRACE 173 if (ktriov != NULL) { 174 if (error == 0) 175 ktrgenio(p, s, UIO_READ, ktriov, 176 len - auio.uio_resid, error); 177 FREE(ktriov, M_TEMP); 178 } 179 #endif 180 if (error) 181 goto out; 182 *retsize = len - auio.uio_resid; 183 if (mp->msg_name) { 184 len = mp->msg_namelen; 185 if (len <= 0 || from == 0) 186 len = 0; 187 else { 188 if (len > from->m_len) 189 len = from->m_len; 190 /* else if len < from->m_len ??? */ 191 error = copyout(mtod(from, caddr_t), 192 (caddr_t)(u_long)mp->msg_name, (unsigned)len); 193 if (error) 194 goto out; 195 } 196 mp->msg_namelen = len; 197 if (namelenp && 198 (error = copyout((caddr_t)&len, namelenp, sizeof(int)))) 199 goto out; 200 } 201 if (mp->msg_control) { 202 len = mp->msg_controllen; 203 if (len <= 0 || control == 0) 204 len = 0; 205 else { 206 struct mbuf *m = control; 207 caddr_t p = (caddr_t)(u_long)mp->msg_control; 208 209 do { 210 i = m->m_len; 211 if (len < i) { 212 mp->msg_flags |= MSG_CTRUNC; 213 i = len; 214 } 215 error = copyout(mtod(m, caddr_t), p, 216 (unsigned)i); 217 if (m->m_next) 218 i = ALIGN(i); 219 p += i; 220 len -= i; 221 if (error != 0 || len <= 0) 222 break; 223 } while ((m = m->m_next) != NULL); 224 len = p - (caddr_t)(u_long)mp->msg_control; 225 } 226 mp->msg_controllen = len; 227 } 228 out: 229 if (from) 230 m_freem(from); 231 if (control) 232 m_freem(control); 233 out1: 234 FILE_UNUSE(fp, p); 235 return (error); 236 } 237 238 int 239 netbsd32_sendmsg(p, v, retval) 240 struct proc *p; 241 void *v; 242 register_t *retval; 243 { 244 struct netbsd32_sendmsg_args /* { 245 syscallarg(int) s; 246 syscallarg(const netbsd32_msghdrp_t) msg; 247 syscallarg(int) flags; 248 } */ *uap = v; 249 struct msghdr msg; 250 struct netbsd32_msghdr msg32; 251 struct iovec aiov[UIO_SMALLIOV], *iov; 252 int error; 253 254 error = copyin((caddr_t)(u_long)SCARG(uap, msg), 255 (caddr_t)&msg32, sizeof(msg32)); 256 if (error) 257 return (error); 258 netbsd32_to_msghdr(&msg32, &msg); 259 if ((u_int)msg.msg_iovlen > UIO_SMALLIOV) { 260 if ((u_int)msg.msg_iovlen > IOV_MAX) 261 return (EMSGSIZE); 262 MALLOC(iov, struct iovec *, 263 sizeof(struct iovec) * (u_int)msg.msg_iovlen, M_IOV, 264 M_WAITOK); 265 } else if ((u_int)msg.msg_iovlen > 0) 266 iov = aiov; 267 else 268 return (EMSGSIZE); 269 error = netbsd32_to_iovecin((struct netbsd32_iovec *)msg.msg_iov, 270 iov, msg.msg_iovlen); 271 if (error) 272 goto done; 273 msg.msg_iov = iov; 274 /* Luckily we can use this directly */ 275 error = sendit(p, SCARG(uap, s), &msg, SCARG(uap, flags), retval); 276 done: 277 if (iov != aiov) 278 FREE(iov, M_IOV); 279 return (error); 280 } 281 282 int 283 netbsd32_recvfrom(p, v, retval) 284 struct proc *p; 285 void *v; 286 register_t *retval; 287 { 288 struct netbsd32_recvfrom_args /* { 289 syscallarg(int) s; 290 syscallarg(netbsd32_voidp) buf; 291 syscallarg(netbsd32_size_t) len; 292 syscallarg(int) flags; 293 syscallarg(netbsd32_sockaddrp_t) from; 294 syscallarg(netbsd32_intp) fromlenaddr; 295 } */ *uap = v; 296 struct netbsd32_msghdr msg; 297 struct iovec aiov; 298 int error; 299 300 if (SCARG(uap, fromlenaddr)) { 301 error = copyin((caddr_t)(u_long)SCARG(uap, fromlenaddr), 302 (caddr_t)&msg.msg_namelen, 303 sizeof(msg.msg_namelen)); 304 if (error) 305 return (error); 306 } else 307 msg.msg_namelen = 0; 308 msg.msg_name = SCARG(uap, from); 309 msg.msg_iov = NULL; /* ignored in recvit32(), uses iov */ 310 msg.msg_iovlen = 1; 311 aiov.iov_base = (caddr_t)(u_long)SCARG(uap, buf); 312 aiov.iov_len = (u_long)SCARG(uap, len); 313 msg.msg_control = 0; 314 msg.msg_flags = SCARG(uap, flags); 315 return (recvit32(p, SCARG(uap, s), &msg, &aiov, 316 (caddr_t)(u_long)SCARG(uap, fromlenaddr), retval)); 317 } 318 319 int 320 netbsd32_sendto(p, v, retval) 321 struct proc *p; 322 void *v; 323 register_t *retval; 324 { 325 struct netbsd32_sendto_args /* { 326 syscallarg(int) s; 327 syscallarg(const netbsd32_voidp) buf; 328 syscallarg(netbsd32_size_t) len; 329 syscallarg(int) flags; 330 syscallarg(const netbsd32_sockaddrp_t) to; 331 syscallarg(int) tolen; 332 } */ *uap = v; 333 struct msghdr msg; 334 struct iovec aiov; 335 336 msg.msg_name = (caddr_t)(u_long)SCARG(uap, to); /* XXX kills const */ 337 msg.msg_namelen = SCARG(uap, tolen); 338 msg.msg_iov = &aiov; 339 msg.msg_iovlen = 1; 340 msg.msg_control = 0; 341 aiov.iov_base = (char *)(u_long)SCARG(uap, buf); /* XXX kills const */ 342 aiov.iov_len = SCARG(uap, len); 343 return (sendit(p, SCARG(uap, s), &msg, SCARG(uap, flags), retval)); 344 } 345