netbsd32_socket.c revision 1.26
1 /* $NetBSD: netbsd32_socket.c,v 1.26 2007/06/01 22:53:52 dsl 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 1.26 2007/06/01 22:53:52 dsl 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 #include <sys/dirent.h> 53 54 #include <compat/netbsd32/netbsd32.h> 55 #include <compat/netbsd32/netbsd32_syscallargs.h> 56 #include <compat/netbsd32/netbsd32_conv.h> 57 58 /* note that the netbsd32_msghdr's iov really points to a struct iovec, not a netbsd32_iovec. */ 59 static int recvit32 __P((struct lwp *, int, struct netbsd32_msghdr *, struct iovec *, void *, 60 register_t *)); 61 62 int 63 netbsd32_recvmsg(l, v, retval) 64 struct lwp *l; 65 void *v; 66 register_t *retval; 67 { 68 struct netbsd32_recvmsg_args /* { 69 syscallarg(int) s; 70 syscallarg(netbsd32_msghdrp_t) msg; 71 syscallarg(int) flags; 72 } */ *uap = v; 73 struct netbsd32_msghdr msg; 74 struct iovec aiov[UIO_SMALLIOV], *uiov, *iov; 75 int error; 76 77 error = copyin(SCARG_P32(uap, msg), &msg, 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 iov = (struct iovec *)malloc( 85 sizeof(struct iovec) * (u_int)msg.msg_iovlen, M_IOV, 86 M_WAITOK); 87 } else 88 iov = aiov; 89 msg.msg_flags = SCARG(uap, flags); 90 uiov = (struct iovec *)NETBSD32PTR64(msg.msg_iov); 91 error = netbsd32_to_iovecin((struct netbsd32_iovec *)uiov, 92 iov, msg.msg_iovlen); 93 if (error) 94 goto done; 95 if ((error = recvit32(l, SCARG(uap, s), &msg, iov, (void *)0, 96 retval)) == 0) { 97 error = copyout(&msg, SCARG_P32(uap, msg), sizeof(msg)); 98 } 99 done: 100 if (iov != aiov) 101 FREE(iov, M_IOV); 102 return (error); 103 } 104 105 int 106 recvit32(l, s, mp, iov, namelenp, retsize) 107 struct lwp *l; 108 int s; 109 struct netbsd32_msghdr *mp; 110 struct iovec *iov; 111 void *namelenp; 112 register_t *retsize; 113 { 114 struct file *fp; 115 struct uio auio; 116 int i; 117 int len, error; 118 struct mbuf *from = 0, *control = 0; 119 struct socket *so; 120 struct proc *p; 121 #ifdef KTRACE 122 struct iovec *ktriov = NULL; 123 #endif 124 p = l->l_proc; 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_rw = UIO_READ; 132 auio.uio_vmspace = l->l_proc->p_vmspace; 133 auio.uio_offset = 0; /* XXX */ 134 auio.uio_resid = 0; 135 for (i = 0; i < mp->msg_iovlen; i++, iov++) { 136 #if 0 137 /* cannot happen iov_len is unsigned */ 138 if (iov->iov_len < 0) { 139 error = EINVAL; 140 goto out1; 141 } 142 #endif 143 /* 144 * Reads return ssize_t because -1 is returned on error. 145 * Therefore we must restrict the length to SSIZE_MAX to 146 * avoid garbage return values. 147 */ 148 auio.uio_resid += iov->iov_len; 149 if (iov->iov_len > SSIZE_MAX || auio.uio_resid > SSIZE_MAX) { 150 error = EINVAL; 151 goto out1; 152 } 153 } 154 #ifdef KTRACE 155 if (KTRPOINT(p, KTR_GENIO)) { 156 int iovlen = auio.uio_iovcnt * sizeof(struct iovec); 157 158 ktriov = (struct iovec *)malloc(iovlen, M_TEMP, M_WAITOK); 159 memcpy((void *)ktriov, (void *)auio.uio_iov, iovlen); 160 } 161 #endif 162 len = auio.uio_resid; 163 so = (struct socket *)fp->f_data; 164 error = (*so->so_receive)(so, &from, &auio, NULL, 165 NETBSD32PTR64(mp->msg_control) ? &control : NULL, 166 &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(l, 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 (NETBSD32PTR64(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, void *), 192 (void *)NETBSD32PTR64(mp->msg_name), 193 (unsigned)len); 194 if (error) 195 goto out; 196 } 197 mp->msg_namelen = len; 198 if (namelenp && 199 (error = copyout((void *)&len, namelenp, sizeof(int)))) 200 goto out; 201 } 202 if (NETBSD32PTR64(mp->msg_control)) { 203 len = mp->msg_controllen; 204 if (len <= 0 || control == 0) 205 len = 0; 206 else { 207 struct mbuf *m = control; 208 void *cp = (void *)NETBSD32PTR64(mp->msg_control); 209 210 do { 211 i = m->m_len; 212 if (len < i) { 213 mp->msg_flags |= MSG_CTRUNC; 214 i = len; 215 } 216 error = copyout(mtod(m, void *), cp, 217 (unsigned)i); 218 if (m->m_next) 219 i = ALIGN(i); 220 cp = (char *)cp + i; 221 len -= i; 222 if (error != 0 || len <= 0) 223 break; 224 } while ((m = m->m_next) != NULL); 225 len = (char *)cp - (char *)NETBSD32PTR64(mp->msg_control); 226 } 227 mp->msg_controllen = len; 228 } 229 out: 230 if (from) 231 m_freem(from); 232 if (control) 233 m_freem(control); 234 out1: 235 FILE_UNUSE(fp, l); 236 return (error); 237 } 238 239 int 240 netbsd32_sendmsg(l, v, retval) 241 struct lwp *l; 242 void *v; 243 register_t *retval; 244 { 245 struct netbsd32_sendmsg_args /* { 246 syscallarg(int) s; 247 syscallarg(const netbsd32_msghdrp_t) msg; 248 syscallarg(int) flags; 249 } */ *uap = v; 250 struct msghdr msg; 251 struct netbsd32_msghdr msg32; 252 struct iovec aiov[UIO_SMALLIOV], *iov; 253 int error; 254 255 error = copyin(SCARG_P32(uap, msg), &msg32, sizeof(msg32)); 256 if (error) 257 return (error); 258 netbsd32_to_msghdr(&msg32, &msg); 259 260 if ((u_int)msg.msg_iovlen > UIO_SMALLIOV) { 261 if ((u_int)msg.msg_iovlen > IOV_MAX) 262 return (EMSGSIZE); 263 iov = (struct iovec *)malloc( 264 sizeof(struct iovec) * (u_int)msg.msg_iovlen, M_IOV, 265 M_WAITOK); 266 } else if ((u_int)msg.msg_iovlen > 0) 267 iov = aiov; 268 else 269 return (EMSGSIZE); 270 271 error = netbsd32_to_iovecin((struct netbsd32_iovec *)msg.msg_iov, 272 iov, msg.msg_iovlen); 273 if (error) 274 goto done; 275 msg.msg_iov = iov; 276 msg.msg_flags = 0; 277 278 /* Luckily we can use this directly */ 279 /* XXX: dsl (June'07) The cmsg alignment rules differ ! */ 280 error = do_sys_sendmsg(l, SCARG(uap, s), &msg, SCARG(uap, flags), retval); 281 done: 282 if (iov != aiov) 283 FREE(iov, M_IOV); 284 return (error); 285 } 286 287 int 288 netbsd32_recvfrom(l, v, retval) 289 struct lwp *l; 290 void *v; 291 register_t *retval; 292 { 293 struct netbsd32_recvfrom_args /* { 294 syscallarg(int) s; 295 syscallarg(netbsd32_voidp) buf; 296 syscallarg(netbsd32_size_t) len; 297 syscallarg(int) flags; 298 syscallarg(netbsd32_sockaddrp_t) from; 299 syscallarg(netbsd32_intp) fromlenaddr; 300 } */ *uap = v; 301 struct netbsd32_msghdr msg; 302 struct iovec aiov; 303 int error; 304 305 if (SCARG_P32(uap, fromlenaddr)) { 306 error = copyin(SCARG_P32(uap, fromlenaddr), 307 &msg.msg_namelen, sizeof(msg.msg_namelen)); 308 if (error) 309 return (error); 310 } else 311 msg.msg_namelen = 0; 312 msg.msg_name = SCARG(uap, from); 313 NETBSD32PTR32(msg.msg_iov, 0); /* ignored in recvit32(), uses iov */ 314 msg.msg_iovlen = 1; 315 aiov.iov_base = SCARG_P32(uap, buf); 316 aiov.iov_len = (u_long)SCARG(uap, len); 317 NETBSD32PTR32(msg.msg_control, 0); 318 msg.msg_flags = SCARG(uap, flags); 319 return (recvit32(l, SCARG(uap, s), &msg, &aiov, 320 SCARG_P32(uap, fromlenaddr), retval)); 321 } 322 323 int 324 netbsd32_sendto(l, v, retval) 325 struct lwp *l; 326 void *v; 327 register_t *retval; 328 { 329 struct netbsd32_sendto_args /* { 330 syscallarg(int) s; 331 syscallarg(const netbsd32_voidp) buf; 332 syscallarg(netbsd32_size_t) len; 333 syscallarg(int) flags; 334 syscallarg(const netbsd32_sockaddrp_t) to; 335 syscallarg(int) tolen; 336 } */ *uap = v; 337 struct msghdr msg; 338 struct iovec aiov; 339 340 msg.msg_name = SCARG_P32(uap, to); /* XXX kills const */ 341 msg.msg_namelen = SCARG(uap, tolen); 342 msg.msg_iov = &aiov; 343 msg.msg_iovlen = 1; 344 msg.msg_control = 0; 345 aiov.iov_base = SCARG_P32(uap, buf); /* XXX kills const */ 346 aiov.iov_len = SCARG(uap, len); 347 msg.msg_flags = 0; 348 return do_sys_sendmsg(l, SCARG(uap, s), &msg, SCARG(uap, flags), retval); 349 } 350
Indexes created Sat Sep 20 22:09:52 GMT 2025