netbsd32_socket.c revision 1.31.6.1
1 /* $NetBSD: netbsd32_socket.c,v 1.31.6.1 2008/05/10 23:48:58 wrstuden 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 1.31.6.1 2008/05/10 23:48:58 wrstuden Exp $"); 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #define msg __msg /* Don't ask me! */ 37 #include <sys/malloc.h> 38 #include <sys/mount.h> 39 #include <sys/socket.h> 40 #include <sys/sockio.h> 41 #include <sys/socketvar.h> 42 #include <sys/mbuf.h> 43 #include <sys/ktrace.h> 44 #include <sys/file.h> 45 #include <sys/filedesc.h> 46 #include <sys/sa.h> 47 #include <sys/syscallargs.h> 48 #include <sys/proc.h> 49 #include <sys/dirent.h> 50 51 #include <compat/netbsd32/netbsd32.h> 52 #include <compat/netbsd32/netbsd32_syscallargs.h> 53 #include <compat/netbsd32/netbsd32_conv.h> 54 55 /* note that the netbsd32_msghdr's iov really points to a struct iovec, not a netbsd32_iovec. */ 56 static int recvit32(struct lwp *, int, struct netbsd32_msghdr *, struct iovec *, void *, 57 register_t *); 58 59 int 60 netbsd32_recvmsg(struct lwp *l, const struct netbsd32_recvmsg_args *uap, register_t *retval) 61 { 62 /* { 63 syscallarg(int) s; 64 syscallarg(netbsd32_msghdrp_t) msg; 65 syscallarg(int) flags; 66 } */ 67 struct netbsd32_msghdr msg; 68 struct iovec aiov[UIO_SMALLIOV], *uiov, *iov; 69 int error; 70 71 error = copyin(SCARG_P32(uap, msg), &msg, sizeof(msg)); 72 /* netbsd32_msghdr needs the iov pre-allocated */ 73 if (error) 74 return (error); 75 if ((u_int)msg.msg_iovlen > UIO_SMALLIOV) { 76 if ((u_int)msg.msg_iovlen > IOV_MAX) 77 return (EMSGSIZE); 78 iov = (struct iovec *)malloc( 79 sizeof(struct iovec) * (u_int)msg.msg_iovlen, M_IOV, 80 M_WAITOK); 81 } else 82 iov = aiov; 83 msg.msg_flags = SCARG(uap, flags); 84 uiov = (struct iovec *)NETBSD32PTR64(msg.msg_iov); 85 error = netbsd32_to_iovecin((struct netbsd32_iovec *)uiov, 86 iov, msg.msg_iovlen); 87 if (error) 88 goto done; 89 if ((error = recvit32(l, SCARG(uap, s), &msg, iov, (void *)0, 90 retval)) == 0) { 91 error = copyout(&msg, SCARG_P32(uap, msg), sizeof(msg)); 92 } 93 done: 94 if (iov != aiov) 95 FREE(iov, M_IOV); 96 return (error); 97 } 98 99 int 100 recvit32(struct lwp *l, int s, struct netbsd32_msghdr *mp, struct iovec *iov, void *namelenp, register_t *retsize) 101 { 102 struct uio auio; 103 int i, len, error, iovlen; 104 struct mbuf *from = 0, *control = 0; 105 struct socket *so; 106 struct proc *p; 107 struct iovec *ktriov = NULL; 108 p = l->l_proc; 109 110 /* getsock() will use the descriptor for us */ 111 if ((error = fd_getsock(s, &so)) != 0) 112 return (error); 113 auio.uio_iov = iov; 114 auio.uio_iovcnt = mp->msg_iovlen; 115 auio.uio_rw = UIO_READ; 116 auio.uio_vmspace = l->l_proc->p_vmspace; 117 auio.uio_offset = 0; /* XXX */ 118 auio.uio_resid = 0; 119 for (i = 0; i < mp->msg_iovlen; i++, iov++) { 120 #if 0 121 /* cannot happen iov_len is unsigned */ 122 if (iov->iov_len < 0) { 123 error = EINVAL; 124 goto out1; 125 } 126 #endif 127 /* 128 * Reads return ssize_t because -1 is returned on error. 129 * Therefore we must restrict the length to SSIZE_MAX to 130 * avoid garbage return values. 131 */ 132 auio.uio_resid += iov->iov_len; 133 if (iov->iov_len > SSIZE_MAX || auio.uio_resid > SSIZE_MAX) { 134 error = EINVAL; 135 goto out1; 136 } 137 } 138 139 if (ktrpoint(KTR_GENIO)) { 140 iovlen = auio.uio_iovcnt * sizeof(struct iovec); 141 ktriov = (struct iovec *)malloc(iovlen, M_TEMP, M_WAITOK); 142 memcpy((void *)ktriov, (void *)auio.uio_iov, iovlen); 143 } 144 145 len = auio.uio_resid; 146 error = (*so->so_receive)(so, &from, &auio, NULL, 147 NETBSD32PTR64(mp->msg_control) ? &control : NULL, 148 &mp->msg_flags); 149 if (error) { 150 if (auio.uio_resid != len && (error == ERESTART || 151 error == EINTR || error == EWOULDBLOCK)) 152 error = 0; 153 } 154 155 if (ktriov != NULL) { 156 ktrgeniov(s, UIO_READ, ktriov, len - auio.uio_resid, error); 157 FREE(ktriov, M_TEMP); 158 } 159 160 if (error) 161 goto out; 162 *retsize = len - auio.uio_resid; 163 if (NETBSD32PTR64(mp->msg_name)) { 164 len = mp->msg_namelen; 165 if (len <= 0 || from == 0) 166 len = 0; 167 else { 168 if (len > from->m_len) 169 len = from->m_len; 170 /* else if len < from->m_len ??? */ 171 error = copyout(mtod(from, void *), 172 (void *)NETBSD32PTR64(mp->msg_name), 173 (unsigned)len); 174 if (error) 175 goto out; 176 } 177 mp->msg_namelen = len; 178 if (namelenp && 179 (error = copyout((void *)&len, namelenp, sizeof(int)))) 180 goto out; 181 } 182 if (NETBSD32PTR64(mp->msg_control)) { 183 len = mp->msg_controllen; 184 if (len <= 0 || control == 0) 185 len = 0; 186 else { 187 struct mbuf *m = control; 188 void *cp = (void *)NETBSD32PTR64(mp->msg_control); 189 190 do { 191 i = m->m_len; 192 if (len < i) { 193 mp->msg_flags |= MSG_CTRUNC; 194 i = len; 195 } 196 error = copyout(mtod(m, void *), cp, 197 (unsigned)i); 198 if (m->m_next) 199 i = ALIGN(i); 200 cp = (char *)cp + i; 201 len -= i; 202 if (error != 0 || len <= 0) 203 break; 204 } while ((m = m->m_next) != NULL); 205 len = (char *)cp - (char *)NETBSD32PTR64(mp->msg_control); 206 } 207 mp->msg_controllen = len; 208 } 209 out: 210 if (from) 211 m_freem(from); 212 if (control) 213 m_freem(control); 214 out1: 215 fd_putfile(s); 216 return (error); 217 } 218 219 int 220 netbsd32_sendmsg(struct lwp *l, const struct netbsd32_sendmsg_args *uap, register_t *retval) 221 { 222 /* { 223 syscallarg(int) s; 224 syscallarg(const netbsd32_msghdrp_t) msg; 225 syscallarg(int) flags; 226 } */ 227 struct msghdr msg; 228 struct netbsd32_msghdr msg32; 229 struct iovec aiov[UIO_SMALLIOV], *iov; 230 int error; 231 232 error = copyin(SCARG_P32(uap, msg), &msg32, sizeof(msg32)); 233 if (error) 234 return (error); 235 netbsd32_to_msghdr(&msg32, &msg); 236 237 if ((u_int)msg.msg_iovlen > UIO_SMALLIOV) { 238 if ((u_int)msg.msg_iovlen > IOV_MAX) 239 return (EMSGSIZE); 240 iov = (struct iovec *)malloc( 241 sizeof(struct iovec) * (u_int)msg.msg_iovlen, M_IOV, 242 M_WAITOK); 243 } else if ((u_int)msg.msg_iovlen > 0) 244 iov = aiov; 245 else 246 return (EMSGSIZE); 247 248 error = netbsd32_to_iovecin((struct netbsd32_iovec *)msg.msg_iov, 249 iov, msg.msg_iovlen); 250 if (error) 251 goto done; 252 msg.msg_iov = iov; 253 msg.msg_flags = 0; 254 255 /* Luckily we can use this directly */ 256 /* XXX: dsl (June'07) The cmsg alignment rules differ ! */ 257 error = do_sys_sendmsg(l, SCARG(uap, s), &msg, SCARG(uap, flags), retval); 258 done: 259 if (iov != aiov) 260 FREE(iov, M_IOV); 261 return (error); 262 } 263 264 int 265 netbsd32_recvfrom(struct lwp *l, const struct netbsd32_recvfrom_args *uap, register_t *retval) 266 { 267 /* { 268 syscallarg(int) s; 269 syscallarg(netbsd32_voidp) buf; 270 syscallarg(netbsd32_size_t) len; 271 syscallarg(int) flags; 272 syscallarg(netbsd32_sockaddrp_t) from; 273 syscallarg(netbsd32_intp) fromlenaddr; 274 } */ 275 struct netbsd32_msghdr msg; 276 struct iovec aiov; 277 int error; 278 279 if (SCARG_P32(uap, fromlenaddr)) { 280 error = copyin(SCARG_P32(uap, fromlenaddr), 281 &msg.msg_namelen, sizeof(msg.msg_namelen)); 282 if (error) 283 return (error); 284 } else 285 msg.msg_namelen = 0; 286 msg.msg_name = SCARG(uap, from); 287 NETBSD32PTR32(msg.msg_iov, 0); /* ignored in recvit32(), uses iov */ 288 msg.msg_iovlen = 1; 289 aiov.iov_base = SCARG_P32(uap, buf); 290 aiov.iov_len = (u_long)SCARG(uap, len); 291 NETBSD32PTR32(msg.msg_control, 0); 292 msg.msg_flags = SCARG(uap, flags); 293 return (recvit32(l, SCARG(uap, s), &msg, &aiov, 294 SCARG_P32(uap, fromlenaddr), retval)); 295 } 296 297 int 298 netbsd32_sendto(struct lwp *l, const struct netbsd32_sendto_args *uap, register_t *retval) 299 { 300 /* { 301 syscallarg(int) s; 302 syscallarg(const netbsd32_voidp) buf; 303 syscallarg(netbsd32_size_t) len; 304 syscallarg(int) flags; 305 syscallarg(const netbsd32_sockaddrp_t) to; 306 syscallarg(int) tolen; 307 } */ 308 struct msghdr msg; 309 struct iovec aiov; 310 311 msg.msg_name = SCARG_P32(uap, to); /* XXX kills const */ 312 msg.msg_namelen = SCARG(uap, tolen); 313 msg.msg_iov = &aiov; 314 msg.msg_iovlen = 1; 315 msg.msg_control = 0; 316 aiov.iov_base = SCARG_P32(uap, buf); /* XXX kills const */ 317 aiov.iov_len = SCARG(uap, len); 318 msg.msg_flags = 0; 319 return do_sys_sendmsg(l, SCARG(uap, s), &msg, SCARG(uap, flags), retval); 320 } 321
Indexes created Sat Sep 20 22:09:52 GMT 2025