netbsd32_socket.c revision 1.33.12.1
1 /* $NetBSD: netbsd32_socket.c,v 1.33.12.1 2010/06/09 18:13:46 matt 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 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: netbsd32_socket.c,v 1.33.12.1 2010/06/09 18:13:46 matt Exp $"); 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #define msg __msg /* Don't ask me! */ 35 #include <sys/malloc.h> 36 #include <sys/mount.h> 37 #include <sys/socket.h> 38 #include <sys/sockio.h> 39 #include <sys/socketvar.h> 40 #include <sys/mbuf.h> 41 #include <sys/ktrace.h> 42 #include <sys/file.h> 43 #include <sys/filedesc.h> 44 #include <sys/syscallargs.h> 45 #include <sys/proc.h> 46 #include <sys/dirent.h> 47 48 #include <compat/netbsd32/netbsd32.h> 49 #include <compat/netbsd32/netbsd32_syscallargs.h> 50 #include <compat/netbsd32/netbsd32_conv.h> 51 52 /* note that the netbsd32_msghdr's iov really points to a struct iovec, not a netbsd32_iovec. */ 53 static int recvit32(struct lwp *, int, struct netbsd32_msghdr *, struct iovec *, void *, 54 register_t *); 55 56 int 57 netbsd32_recvmsg(struct lwp *l, const struct netbsd32_recvmsg_args *uap, register_t *retval) 58 { 59 /* { 60 syscallarg(int) s; 61 syscallarg(netbsd32_msghdrp_t) msg; 62 syscallarg(int) flags; 63 } */ 64 struct netbsd32_msghdr msg; 65 struct iovec aiov[UIO_SMALLIOV], *uiov, *iov; 66 int error; 67 68 error = copyin(SCARG_P32(uap, msg), &msg, sizeof(msg)); 69 /* netbsd32_msghdr needs the iov pre-allocated */ 70 if (error) 71 return (error); 72 if ((u_int)msg.msg_iovlen > UIO_SMALLIOV) { 73 if ((u_int)msg.msg_iovlen > IOV_MAX) 74 return (EMSGSIZE); 75 iov = (struct iovec *)malloc( 76 sizeof(struct iovec) * (u_int)msg.msg_iovlen, M_IOV, 77 M_WAITOK); 78 } else 79 iov = aiov; 80 81 msg.msg_flags = SCARG(uap, flags); 82 uiov = (struct iovec *)NETBSD32PTR64(msg.msg_iov); 83 error = netbsd32_to_iovecin((struct netbsd32_iovec *)uiov, 84 iov, msg.msg_iovlen); 85 if (error) 86 goto done; 87 if ((error = recvit32(l, SCARG(uap, s), &msg, iov, (void *)0, 88 retval)) == 0) { 89 error = copyout(&msg, SCARG_P32(uap, msg), sizeof(msg)); 90 } 91 done: 92 if (iov != aiov) 93 FREE(iov, M_IOV); 94 return (error); 95 } 96 97 int 98 recvit32(struct lwp *l, int s, struct netbsd32_msghdr *mp, struct iovec *iov, void *namelenp, register_t *retsize) 99 { 100 struct uio auio; 101 int i, len, error, iovlen; 102 struct mbuf *from = 0, *control = 0; 103 struct socket *so; 104 struct proc *p; 105 struct iovec *ktriov = NULL; 106 p = l->l_proc; 107 108 /* fd_getsock() will use the descriptor for us */ 109 if ((error = fd_getsock(s, &so)) != 0) 110 return (error); 111 auio.uio_iov = iov; 112 auio.uio_iovcnt = mp->msg_iovlen; 113 auio.uio_rw = UIO_READ; 114 auio.uio_vmspace = l->l_proc->p_vmspace; 115 auio.uio_offset = 0; /* XXX */ 116 auio.uio_resid = 0; 117 for (i = 0; i < mp->msg_iovlen; i++, iov++) { 118 #if 0 119 /* cannot happen iov_len is unsigned */ 120 if (iov->iov_len < 0) { 121 error = EINVAL; 122 goto out1; 123 } 124 #endif 125 /* 126 * Reads return ssize_t because -1 is returned on error. 127 * Therefore we must restrict the length to SSIZE_MAX to 128 * avoid garbage return values. 129 */ 130 auio.uio_resid += iov->iov_len; 131 if (iov->iov_len > SSIZE_MAX || auio.uio_resid > SSIZE_MAX) { 132 error = EINVAL; 133 goto out1; 134 } 135 } 136 137 if (ktrpoint(KTR_GENIO)) { 138 iovlen = auio.uio_iovcnt * sizeof(struct iovec); 139 ktriov = (struct iovec *)malloc(iovlen, M_TEMP, M_WAITOK); 140 memcpy((void *)ktriov, (void *)auio.uio_iov, iovlen); 141 } 142 143 len = auio.uio_resid; 144 error = (*so->so_receive)(so, &from, &auio, NULL, 145 NETBSD32PTR64(mp->msg_control) ? &control : NULL, 146 &mp->msg_flags); 147 if (error) { 148 if (auio.uio_resid != len && (error == ERESTART || 149 error == EINTR || error == EWOULDBLOCK)) 150 error = 0; 151 } 152 153 if (ktriov != NULL) { 154 ktrgeniov(s, UIO_READ, ktriov, len - auio.uio_resid, error); 155 FREE(ktriov, M_TEMP); 156 } 157 158 if (error) 159 goto out; 160 *retsize = len - auio.uio_resid; 161 if (NETBSD32PTR64(mp->msg_name)) { 162 len = mp->msg_namelen; 163 if (len <= 0 || from == 0) 164 len = 0; 165 else { 166 if (len > from->m_len) 167 len = from->m_len; 168 /* else if len < from->m_len ??? */ 169 error = copyout(mtod(from, void *), 170 (void *)NETBSD32PTR64(mp->msg_name), 171 (unsigned)len); 172 if (error) 173 goto out; 174 } 175 mp->msg_namelen = len; 176 if (namelenp && 177 (error = copyout((void *)&len, namelenp, sizeof(int)))) 178 goto out; 179 } 180 if (NETBSD32PTR64(mp->msg_control)) { 181 len = mp->msg_controllen; 182 if (len <= 0 || control == 0) 183 len = 0; 184 else { 185 struct mbuf *m = control; 186 void *cp = (void *)NETBSD32PTR64(mp->msg_control); 187 188 do { 189 i = m->m_len; 190 if (len < i) { 191 mp->msg_flags |= MSG_CTRUNC; 192 i = len; 193 } 194 error = copyout(mtod(m, void *), cp, 195 (unsigned)i); 196 if (m->m_next) 197 i = ALIGN(i); 198 cp = (char *)cp + i; 199 len -= i; 200 if (error != 0 || len <= 0) 201 break; 202 } while ((m = m->m_next) != NULL); 203 len = (char *)cp - (char *)NETBSD32PTR64(mp->msg_control); 204 } 205 mp->msg_controllen = len; 206 } 207 out: 208 if (from) 209 m_freem(from); 210 if (control) 211 m_freem(control); 212 out1: 213 fd_putfile(s); 214 return (error); 215 } 216 217 int 218 netbsd32_sendmsg(struct lwp *l, const struct netbsd32_sendmsg_args *uap, register_t *retval) 219 { 220 /* { 221 syscallarg(int) s; 222 syscallarg(const netbsd32_msghdrp_t) msg; 223 syscallarg(int) flags; 224 } */ 225 struct msghdr msg; 226 struct netbsd32_msghdr msg32; 227 struct iovec aiov[UIO_SMALLIOV], *iov; 228 int error; 229 230 error = copyin(SCARG_P32(uap, msg), &msg32, sizeof(msg32)); 231 if (error) 232 return (error); 233 netbsd32_to_msghdr(&msg32, &msg); 234 235 if ((u_int)msg.msg_iovlen > UIO_SMALLIOV) { 236 if ((u_int)msg.msg_iovlen > IOV_MAX) 237 return (EMSGSIZE); 238 iov = (struct iovec *)malloc( 239 sizeof(struct iovec) * (u_int)msg.msg_iovlen, M_IOV, 240 M_WAITOK); 241 } else 242 iov = aiov; 243 244 error = netbsd32_to_iovecin((struct netbsd32_iovec *)msg.msg_iov, 245 iov, msg.msg_iovlen); 246 if (error) 247 goto done; 248 msg.msg_iov = iov; 249 msg.msg_flags = 0; 250 251 /* Luckily we can use this directly */ 252 /* XXX: dsl (June'07) The cmsg alignment rules differ ! */ 253 error = do_sys_sendmsg(l, SCARG(uap, s), &msg, SCARG(uap, flags), retval); 254 done: 255 if (iov != aiov) 256 FREE(iov, M_IOV); 257 return (error); 258 } 259 260 int 261 netbsd32_recvfrom(struct lwp *l, const struct netbsd32_recvfrom_args *uap, register_t *retval) 262 { 263 /* { 264 syscallarg(int) s; 265 syscallarg(netbsd32_voidp) buf; 266 syscallarg(netbsd32_size_t) len; 267 syscallarg(int) flags; 268 syscallarg(netbsd32_sockaddrp_t) from; 269 syscallarg(netbsd32_intp) fromlenaddr; 270 } */ 271 struct netbsd32_msghdr msg; 272 struct iovec aiov; 273 int error; 274 275 if (SCARG_P32(uap, fromlenaddr)) { 276 error = copyin(SCARG_P32(uap, fromlenaddr), 277 &msg.msg_namelen, sizeof(msg.msg_namelen)); 278 if (error) 279 return (error); 280 } else 281 msg.msg_namelen = 0; 282 msg.msg_name = SCARG(uap, from); 283 NETBSD32PTR32(msg.msg_iov, 0); /* ignored in recvit32(), uses iov */ 284 msg.msg_iovlen = 1; 285 aiov.iov_base = SCARG_P32(uap, buf); 286 aiov.iov_len = (u_long)SCARG(uap, len); 287 NETBSD32PTR32(msg.msg_control, 0); 288 msg.msg_flags = SCARG(uap, flags); 289 return (recvit32(l, SCARG(uap, s), &msg, &aiov, 290 SCARG_P32(uap, fromlenaddr), retval)); 291 } 292 293 int 294 netbsd32_sendto(struct lwp *l, const struct netbsd32_sendto_args *uap, register_t *retval) 295 { 296 /* { 297 syscallarg(int) s; 298 syscallarg(const netbsd32_voidp) buf; 299 syscallarg(netbsd32_size_t) len; 300 syscallarg(int) flags; 301 syscallarg(const netbsd32_sockaddrp_t) to; 302 syscallarg(int) tolen; 303 } */ 304 struct msghdr msg; 305 struct iovec aiov; 306 307 msg.msg_name = SCARG_P32(uap, to); /* XXX kills const */ 308 msg.msg_namelen = SCARG(uap, tolen); 309 msg.msg_iov = &aiov; 310 msg.msg_iovlen = 1; 311 msg.msg_control = 0; 312 aiov.iov_base = SCARG_P32(uap, buf); /* XXX kills const */ 313 aiov.iov_len = SCARG(uap, len); 314 msg.msg_flags = 0; 315 return do_sys_sendmsg(l, SCARG(uap, s), &msg, SCARG(uap, flags), retval); 316 } 317
Indexes created Sat Sep 20 22:09:52 GMT 2025