1 /* 2 * Copyright (c) 2019 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 _SKYWALK_NAMESPACE_PROTONS_H_ 29 #define _SKYWALK_NAMESPACE_PROTONS_H_ 30 31 32 /* 33 * The protons module arbitrates IP protocol number usage across Skywalk and 34 * the BSD networking stack. The IP protocol number is managed globally 35 * regardless of interface or IP address. 36 */ 37 38 extern int protons_init(void); 39 extern void protons_fini(void); 40 41 /* opaque token representing a protocol namespace reservation. */ 42 struct protons_token; 43 44 /* 45 * Reserve a IP protocol number globally. 46 * Reserved protocol namespace token is return via @ptp. 47 */ 48 extern int protons_reserve(struct protons_token **ptp, pid_t pid, pid_t epid, 49 uint8_t proto); 50 51 /* 52 * Release a IP protocol reservation recorded by the provided token. 53 * *ptp will be reset to NULL after release. 54 */ 55 extern void protons_release(struct protons_token **ptp); 56 57 extern int protons_token_get_use_count(struct protons_token *pt); 58 extern bool protons_token_is_valid(struct protons_token *pt); 59 extern bool protons_token_has_matching_pid(struct protons_token *pt, pid_t pid, 60 pid_t epid); 61 62 #endif /* !_SKYWALK_NAMESPACE_PROTONS_H_ */ 63