netbsd32_socket.c revision 1.7
1 /* $NetBSD: netbsd32_socket.c,v 1.7 2002/10/23 13:16:45 scw 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 1.7 2002/10/23 13:16:45 scw 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)NETBSD32PTR64(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 *)NETBSD32PTR64(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, 98 retval)) == 0) { 99 error = copyout((caddr_t)&msg, 100 (caddr_t)NETBSD32PTR64(SCARG(uap, msg)), sizeof(msg)); 101 } 102 done: 103 if (iov != aiov) 104 FREE(iov, M_IOV); 105 return (error); 106 } 107 108 int 109 recvit32(p, s, mp, iov, namelenp, retsize) 110 struct proc *p; 111 int s; 112 struct netbsd32_msghdr *mp; 113 struct iovec *iov; 114 caddr_t namelenp; 115 register_t *retsize; 116 { 117 struct file *fp; 118 struct uio auio; 119 int i; 120 int len, error; 121 struct mbuf *from = 0, *control = 0; 122 struct socket *so; 123 #ifdef KTRACE 124 struct iovec *ktriov = NULL; 125 #endif 126 127 /* getsock() will use the descriptor for us */ 128 if ((error = getsock(p->p_fd, s, &fp)) != 0) 129 return (error); 130 auio.uio_iov = iov; 131 auio.uio_iovcnt = mp->msg_iovlen; 132 auio.uio_segflg = UIO_USERSPACE; 133 auio.uio_rw = UIO_READ; 134 auio.uio_procp = p; 135 auio.uio_offset = 0; /* XXX */ 136 auio.uio_resid = 0; 137 for (i = 0; i < mp->msg_iovlen; i++, iov++) { 138 #if 0 139 /* cannot happen iov_len is unsigned */ 140 if (iov->iov_len < 0) { 141 error = EINVAL; 142 goto out1; 143 } 144 #endif 145 /* 146 * Reads return ssize_t because -1 is returned on error. 147 * Therefore we must restrict the length to SSIZE_MAX to 148 * avoid garbage return values. 149 */ 150 auio.uio_resid += iov->iov_len; 151 if (iov->iov_len > SSIZE_MAX || auio.uio_resid > SSIZE_MAX) { 152 error = EINVAL; 153 goto out1; 154 } 155 } 156 #ifdef KTRACE 157 if (KTRPOINT(p, KTR_GENIO)) { 158 int iovlen = auio.uio_iovcnt * sizeof(struct iovec); 159 160 MALLOC(ktriov, struct iovec *, iovlen, M_TEMP, M_WAITOK); 161 memcpy((caddr_t)ktriov, (caddr_t)auio.uio_iov, iovlen); 162 } 163 #endif 164 len = auio.uio_resid; 165 so = (struct socket *)fp->f_data; 166 error = (*so->so_receive)(so, &from, &auio, NULL, 167 mp->msg_control ? &control : NULL, &mp->msg_flags); 168 if (error) { 169 if (auio.uio_resid != len && (error == ERESTART || 170 error == EINTR || error == EWOULDBLOCK)) 171 error = 0; 172 } 173 #ifdef KTRACE 174 if (ktriov != NULL) { 175 if (error == 0) 176 ktrgenio(p, s, UIO_READ, ktriov, 177 len - auio.uio_resid, error); 178 FREE(ktriov, M_TEMP); 179 } 180 #endif 181 if (error) 182 goto out; 183 *retsize = len - auio.uio_resid; 184 if (mp->msg_name) { 185 len = mp->msg_namelen; 186 if (len <= 0 || from == 0) 187 len = 0; 188 else { 189 if (len > from->m_len) 190 len = from->m_len; 191 /* else if len < from->m_len ??? */ 192 error = copyout(mtod(from, caddr_t), 193 (caddr_t)NETBSD32PTR64(mp->msg_name), 194 (unsigned)len); 195 if (error) 196 goto out; 197 } 198 mp->msg_namelen = len; 199 if (namelenp && 200 (error = copyout((caddr_t)&len, namelenp, sizeof(int)))) 201 goto out; 202 } 203 if (mp->msg_control) { 204 len = mp->msg_controllen; 205 if (len <= 0 || control == 0) 206 len = 0; 207 else { 208 struct mbuf *m = control; 209 caddr_t p = (caddr_t)NETBSD32PTR64(mp->msg_control); 210 211 do { 212 i = m->m_len; 213 if (len < i) { 214 mp->msg_flags |= MSG_CTRUNC; 215 i = len; 216 } 217 error = copyout(mtod(m, caddr_t), p, 218 (unsigned)i); 219 if (m->m_next) 220 i = ALIGN(i); 221 p += i; 222 len -= i; 223 if (error != 0 || len <= 0) 224 break; 225 } while ((m = m->m_next) != NULL); 226 len = p - (caddr_t)NETBSD32PTR64(mp->msg_control); 227 } 228 mp->msg_controllen = len; 229 } 230 out: 231 if (from) 232 m_freem(from); 233 if (control) 234 m_freem(control); 235 out1: 236 FILE_UNUSE(fp, p); 237 return (error); 238 } 239 240 int 241 netbsd32_sendmsg(p, v, retval) 242 struct proc *p; 243 void *v; 244 register_t *retval; 245 { 246 struct netbsd32_sendmsg_args /* { 247 syscallarg(int) s; 248 syscallarg(const netbsd32_msghdrp_t) msg; 249 syscallarg(int) flags; 250 } */ *uap = v; 251 struct msghdr msg; 252 struct netbsd32_msghdr msg32; 253 struct iovec aiov[UIO_SMALLIOV], *iov; 254 int error; 255 256 error = copyin((caddr_t)NETBSD32PTR64(SCARG(uap, msg)), (caddr_t)&msg32, 257 sizeof(msg32)); 258 if (error) 259 return (error); 260 netbsd32_to_msghdr(&msg32, &msg); 261 if ((u_int)msg.msg_iovlen > UIO_SMALLIOV) { 262 if ((u_int)msg.msg_iovlen > IOV_MAX) 263 return (EMSGSIZE); 264 MALLOC(iov, struct iovec *, 265 sizeof(struct iovec) * (u_int)msg.msg_iovlen, M_IOV, 266 M_WAITOK); 267 } else if ((u_int)msg.msg_iovlen > 0) 268 iov = aiov; 269 else 270 return (EMSGSIZE); 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 /* Luckily we can use this directly */ 277 error = sendit(p, SCARG(uap, s), &msg, SCARG(uap, flags), retval); 278 done: 279 if (iov != aiov) 280 FREE(iov, M_IOV); 281 return (error); 282 } 283 284 int 285 netbsd32_recvfrom(p, v, retval) 286 struct proc *p; 287 void *v; 288 register_t *retval; 289 { 290 struct netbsd32_recvfrom_args /* { 291 syscallarg(int) s; 292 syscallarg(netbsd32_voidp) buf; 293 syscallarg(netbsd32_size_t) len; 294 syscallarg(int) flags; 295 syscallarg(netbsd32_sockaddrp_t) from; 296 syscallarg(netbsd32_intp) fromlenaddr; 297 } */ *uap = v; 298 struct netbsd32_msghdr msg; 299 struct iovec aiov; 300 int error; 301 302 if (SCARG(uap, fromlenaddr)) { 303 error = copyin((caddr_t)NETBSD32PTR64(SCARG(uap, fromlenaddr)), 304 (caddr_t)&msg.msg_namelen, sizeof(msg.msg_namelen)); 305 if (error) 306 return (error); 307 } else 308 msg.msg_namelen = 0; 309 msg.msg_name = SCARG(uap, from); 310 msg.msg_iov = NULL; /* ignored in recvit32(), uses iov */ 311 msg.msg_iovlen = 1; 312 aiov.iov_base = (caddr_t)NETBSD32PTR64(SCARG(uap, buf)); 313 aiov.iov_len = (u_long)SCARG(uap, len); 314 msg.msg_control = 0; 315 msg.msg_flags = SCARG(uap, flags); 316 return (recvit32(p, SCARG(uap, s), &msg, &aiov, 317 (caddr_t)NETBSD32PTR64(SCARG(uap, fromlenaddr)), retval)); 318 } 319 320 int 321 netbsd32_sendto(p, v, retval) 322 struct proc *p; 323 void *v; 324 register_t *retval; 325 { 326 struct netbsd32_sendto_args /* { 327 syscallarg(int) s; 328 syscallarg(const netbsd32_voidp) buf; 329 syscallarg(netbsd32_size_t) len; 330 syscallarg(int) flags; 331 syscallarg(const netbsd32_sockaddrp_t) to; 332 syscallarg(int) tolen; 333 } */ *uap = v; 334 struct msghdr msg; 335 struct iovec aiov; 336 337 msg.msg_name = (caddr_t)NETBSD32PTR64(SCARG(uap, to)); /* XXX kills const */ 338 msg.msg_namelen = SCARG(uap, tolen); 339 msg.msg_iov = &aiov; 340 msg.msg_iovlen = 1; 341 msg.msg_control = 0; 342 aiov.iov_base = (char *)NETBSD32PTR64(SCARG(uap, buf)); /* XXX kills const */ 343 aiov.iov_len = SCARG(uap, len); 344 return (sendit(p, SCARG(uap, s), &msg, SCARG(uap, flags), retval)); 345 } 346
Indexes created Sat Sep 20 22:09:52 GMT 2025