netbsd32_socket.c revision 1.11
1 /* $NetBSD: netbsd32_socket.c,v 1.11 2003/06/29 22:29:39 fvdl 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 1.11 2003/06/29 22:29:39 fvdl 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/sa.h> 51 #include <sys/syscallargs.h> 52 #include <sys/proc.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 proc *, int, struct netbsd32_msghdr *, struct iovec *, caddr_t, 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((caddr_t)NETBSD32PTR64(SCARG(uap, msg)), (caddr_t)&msg, 78 sizeof(msg)); 79 /* netbsd32_msghdr needs the iov pre-allocated */ 80 if (error) 81 return (error); 82 if ((u_int)msg.msg_iovlen > UIO_SMALLIOV) { 83 if ((u_int)msg.msg_iovlen > IOV_MAX) 84 return (EMSGSIZE); 85 MALLOC(iov, struct iovec *, 86 sizeof(struct iovec) * (u_int)msg.msg_iovlen, M_IOV, 87 M_WAITOK); 88 } else if ((u_int)msg.msg_iovlen > 0) 89 iov = aiov; 90 else 91 return (EMSGSIZE); 92 msg.msg_flags = SCARG(uap, flags); 93 uiov = (struct iovec *)NETBSD32PTR64(msg.msg_iov); 94 error = netbsd32_to_iovecin((struct netbsd32_iovec *)uiov, 95 iov, msg.msg_iovlen); 96 if (error) 97 goto done; 98 if ((error = recvit32(l->l_proc, SCARG(uap, s), &msg, iov, (caddr_t)0, 99 retval)) == 0) { 100 error = copyout((caddr_t)&msg, 101 (caddr_t)NETBSD32PTR64(SCARG(uap, msg)), sizeof(msg)); 102 } 103 done: 104 if (iov != aiov) 105 FREE(iov, M_IOV); 106 return (error); 107 } 108 109 int 110 recvit32(p, s, mp, iov, namelenp, retsize) 111 struct proc *p; 112 int s; 113 struct netbsd32_msghdr *mp; 114 struct iovec *iov; 115 caddr_t namelenp; 116 register_t *retsize; 117 { 118 struct file *fp; 119 struct uio auio; 120 int i; 121 int len, error; 122 struct mbuf *from = 0, *control = 0; 123 struct socket *so; 124 #ifdef KTRACE 125 struct iovec *ktriov = NULL; 126 #endif 127 128 /* getsock() will use the descriptor for us */ 129 if ((error = getsock(p->p_fd, s, &fp)) != 0) 130 return (error); 131 auio.uio_iov = iov; 132 auio.uio_iovcnt = mp->msg_iovlen; 133 auio.uio_segflg = UIO_USERSPACE; 134 auio.uio_rw = UIO_READ; 135 auio.uio_procp = p; 136 auio.uio_offset = 0; /* XXX */ 137 auio.uio_resid = 0; 138 for (i = 0; i < mp->msg_iovlen; i++, iov++) { 139 #if 0 140 /* cannot happen iov_len is unsigned */ 141 if (iov->iov_len < 0) { 142 error = EINVAL; 143 goto out1; 144 } 145 #endif 146 /* 147 * Reads return ssize_t because -1 is returned on error. 148 * Therefore we must restrict the length to SSIZE_MAX to 149 * avoid garbage return values. 150 */ 151 auio.uio_resid += iov->iov_len; 152 if (iov->iov_len > SSIZE_MAX || auio.uio_resid > SSIZE_MAX) { 153 error = EINVAL; 154 goto out1; 155 } 156 } 157 #ifdef KTRACE 158 if (KTRPOINT(p, KTR_GENIO)) { 159 int iovlen = auio.uio_iovcnt * sizeof(struct iovec); 160 161 MALLOC(ktriov, struct iovec *, iovlen, M_TEMP, M_WAITOK); 162 memcpy((caddr_t)ktriov, (caddr_t)auio.uio_iov, iovlen); 163 } 164 #endif 165 len = auio.uio_resid; 166 so = (struct socket *)fp->f_data; 167 error = (*so->so_receive)(so, &from, &auio, NULL, 168 mp->msg_control ? &control : NULL, &mp->msg_flags); 169 if (error) { 170 if (auio.uio_resid != len && (error == ERESTART || 171 error == EINTR || error == EWOULDBLOCK)) 172 error = 0; 173 } 174 #ifdef KTRACE 175 if (ktriov != NULL) { 176 if (error == 0) 177 ktrgenio(p, s, UIO_READ, ktriov, 178 len - auio.uio_resid, error); 179 FREE(ktriov, M_TEMP); 180 } 181 #endif 182 if (error) 183 goto out; 184 *retsize = len - auio.uio_resid; 185 if (mp->msg_name) { 186 len = mp->msg_namelen; 187 if (len <= 0 || from == 0) 188 len = 0; 189 else { 190 if (len > from->m_len) 191 len = from->m_len; 192 /* else if len < from->m_len ??? */ 193 error = copyout(mtod(from, caddr_t), 194 (caddr_t)NETBSD32PTR64(mp->msg_name), 195 (unsigned)len); 196 if (error) 197 goto out; 198 } 199 mp->msg_namelen = len; 200 if (namelenp && 201 (error = copyout((caddr_t)&len, namelenp, sizeof(int)))) 202 goto out; 203 } 204 if (mp->msg_control) { 205 len = mp->msg_controllen; 206 if (len <= 0 || control == 0) 207 len = 0; 208 else { 209 struct mbuf *m = control; 210 caddr_t p = (caddr_t)NETBSD32PTR64(mp->msg_control); 211 212 do { 213 i = m->m_len; 214 if (len < i) { 215 mp->msg_flags |= MSG_CTRUNC; 216 i = len; 217 } 218 error = copyout(mtod(m, caddr_t), p, 219 (unsigned)i); 220 if (m->m_next) 221 i = ALIGN(i); 222 p += i; 223 len -= i; 224 if (error != 0 || len <= 0) 225 break; 226 } while ((m = m->m_next) != NULL); 227 len = p - (caddr_t)NETBSD32PTR64(mp->msg_control); 228 } 229 mp->msg_controllen = len; 230 } 231 out: 232 if (from) 233 m_freem(from); 234 if (control) 235 m_freem(control); 236 out1: 237 FILE_UNUSE(fp, p); 238 return (error); 239 } 240 241 int 242 netbsd32_sendmsg(l, v, retval) 243 struct lwp *l; 244 void *v; 245 register_t *retval; 246 { 247 struct netbsd32_sendmsg_args /* { 248 syscallarg(int) s; 249 syscallarg(const netbsd32_msghdrp_t) msg; 250 syscallarg(int) flags; 251 } */ *uap = v; 252 struct msghdr msg; 253 struct netbsd32_msghdr msg32; 254 struct iovec aiov[UIO_SMALLIOV], *iov; 255 int error; 256 257 error = copyin((caddr_t)NETBSD32PTR64(SCARG(uap, msg)), (caddr_t)&msg32, 258 sizeof(msg32)); 259 if (error) 260 return (error); 261 netbsd32_to_msghdr(&msg32, &msg); 262 if ((u_int)msg.msg_iovlen > UIO_SMALLIOV) { 263 if ((u_int)msg.msg_iovlen > IOV_MAX) 264 return (EMSGSIZE); 265 MALLOC(iov, struct iovec *, 266 sizeof(struct iovec) * (u_int)msg.msg_iovlen, M_IOV, 267 M_WAITOK); 268 } else if ((u_int)msg.msg_iovlen > 0) 269 iov = aiov; 270 else 271 return (EMSGSIZE); 272 error = netbsd32_to_iovecin((struct netbsd32_iovec *)msg.msg_iov, 273 iov, msg.msg_iovlen); 274 if (error) 275 goto done; 276 msg.msg_iov = iov; 277 /* Luckily we can use this directly */ 278 error = sendit(l->l_proc, SCARG(uap, s), &msg, SCARG(uap, flags), retval); 279 done: 280 if (iov != aiov) 281 FREE(iov, M_IOV); 282 return (error); 283 } 284 285 int 286 netbsd32_recvfrom(l, v, retval) 287 struct lwp *l; 288 void *v; 289 register_t *retval; 290 { 291 struct netbsd32_recvfrom_args /* { 292 syscallarg(int) s; 293 syscallarg(netbsd32_voidp) buf; 294 syscallarg(netbsd32_size_t) len; 295 syscallarg(int) flags; 296 syscallarg(netbsd32_sockaddrp_t) from; 297 syscallarg(netbsd32_intp) fromlenaddr; 298 } */ *uap = v; 299 struct netbsd32_msghdr msg; 300 struct iovec aiov; 301 int error; 302 303 if (SCARG(uap, fromlenaddr)) { 304 error = copyin((caddr_t)NETBSD32PTR64(SCARG(uap, fromlenaddr)), 305 (caddr_t)&msg.msg_namelen, sizeof(msg.msg_namelen)); 306 if (error) 307 return (error); 308 } else 309 msg.msg_namelen = 0; 310 msg.msg_name = SCARG(uap, from); 311 msg.msg_iov = NULL; /* ignored in recvit32(), uses iov */ 312 msg.msg_iovlen = 1; 313 aiov.iov_base = (caddr_t)NETBSD32PTR64(SCARG(uap, buf)); 314 aiov.iov_len = (u_long)SCARG(uap, len); 315 msg.msg_control = 0; 316 msg.msg_flags = SCARG(uap, flags); 317 return (recvit32(l->l_proc, SCARG(uap, s), &msg, &aiov, 318 (caddr_t)NETBSD32PTR64(SCARG(uap, fromlenaddr)), retval)); 319 } 320 321 int 322 netbsd32_sendto(l, v, retval) 323 struct lwp *l; 324 void *v; 325 register_t *retval; 326 { 327 struct netbsd32_sendto_args /* { 328 syscallarg(int) s; 329 syscallarg(const netbsd32_voidp) buf; 330 syscallarg(netbsd32_size_t) len; 331 syscallarg(int) flags; 332 syscallarg(const netbsd32_sockaddrp_t) to; 333 syscallarg(int) tolen; 334 } */ *uap = v; 335 struct msghdr msg; 336 struct iovec aiov; 337 338 msg.msg_name = (caddr_t)NETBSD32PTR64(SCARG(uap, to)); /* XXX kills const */ 339 msg.msg_namelen = SCARG(uap, tolen); 340 msg.msg_iov = &aiov; 341 msg.msg_iovlen = 1; 342 msg.msg_control = 0; 343 aiov.iov_base = (char *)NETBSD32PTR64(SCARG(uap, buf)); /* XXX kills const */ 344 aiov.iov_len = SCARG(uap, len); 345 return (sendit(l->l_proc, SCARG(uap, s), &msg, SCARG(uap, flags), retval)); 346 } 347
Indexes created Sat Sep 20 22:09:52 GMT 2025