1 /* 2 * Copyright (c) 2023 Apple Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28 #ifndef _NET_SOCKADDRD_UTILS_H_ 29 #define _NET_SOCKADDRD_UTILS_H_ 30 31 #ifdef XNU_KERNEL_PRIVATE 32 33 #include <sys/mcache.h> 34 #include <sys/socket.h> 35 36 /* 37 * Various helper routines for dealing with socket addreses. 38 */ 39 40 /* 41 * Copy the contents of the sockadddr `from' into the memory pointed by `to', 42 * which has at least `len' bytes. 43 */ 44 #define SOCKADDR_COPY_LEN(from, to, len) do { \ 45 caddr_t from_bytes __bidi_indexable = NULL; \ 46 caddr_t to_bytes __bidi_indexable = NULL; \ 47 uint32_t from_len; \ 48 VERIFY((to) != NULL && (from) != NULL); \ 49 VERIFY(offsetof(struct sockaddr, sa_data) <= (len)); \ 50 from_len = *((uint8_t*)(void*)(from)); \ 51 VERIFY(from_len <= (len)); \ 52 from_bytes = __unsafe_forge_bidi_indexable(caddr_t, (from), from_len); \ 53 to_bytes = __unsafe_forge_bidi_indexable(caddr_t, (to), from_len); \ 54 *to_bytes = *from_bytes; \ 55 *(to_bytes + offsetof(struct sockaddr, sa_family)) = \ 56 *(from_bytes + offsetof(struct sockaddr, sa_family)); \ 57 if (offsetof(struct sockaddr, sa_data) < from_len) { \ 58 bcopy(from_bytes + offsetof(struct sockaddr, sa_data), \ 59 to_bytes + offsetof(struct sockaddr, sa_data), \ 60 from_len - offsetof(struct sockaddr, sa_data)); \ 61 } \ 62 } while(0) 63 64 /* 65 * Copy the contents of the sockaddr `from' into the pointee of `to'. 66 */ 67 #define SOCKADDR_COPY(from, to) do { \ 68 VERIFY((to) != NULL && (from) != NULL); \ 69 SOCKADDR_COPY_LEN(from, to, sizeof(*(to))); \ 70 } while(0) 71 72 #endif /* XNU_KERNEL_PRIVATE */ 73 74 #endif /* _NET_SOCKADDRD_UTILS_H_ */ 75