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 | |
29 | #ifndef _NETINET_UDP_LOG_H_ |
30 | #define _NETINET_UDP_LOG_H_ |
31 | |
32 | extern uint32_t udp_log_enable_flags; |
33 | extern uint32_t udp_log_port; |
34 | |
35 | #define UDP_ENABLE_FLAG_LIST \ |
36 | X(ULEF_BIND, 0x00000002, bind) \ |
37 | X(ULEF_CONNECTION, 0x00000001, connection) \ |
38 | X(ULEF_LOG, 0x00000008, log) \ |
39 | X(ULEF_DST_LOOPBACK, 0x00000010, loop) \ |
40 | X(ULEF_DST_LOCAL, 0x00000020, local) \ |
41 | X(ULEF_DST_GW, 0x00000040, gw) \ |
42 | X(ULEF_DROP_NECP, 0x00001000, dropnecp) \ |
43 | X(ULEF_DROP_PCB, 0x00002000, droppcb) \ |
44 | X(ULEF_DROP_PKT, 0x00004000, droppkt) |
45 | |
46 | /* |
47 | * Flag values for udp_log_enable_flags |
48 | */ |
49 | enum { |
50 | #define X(name, value, ...) name = value, |
51 | UDP_ENABLE_FLAG_LIST |
52 | #undef X |
53 | }; |
54 | |
55 | #define ULEF_MASK_DST (ULEF_DST_LOOPBACK | ULEF_DST_LOCAL | ULEF_DST_GW) |
56 | |
57 | extern void udp_log_bind(struct inpcb *inp, const char *event, int error); |
58 | extern void udp_log_connection(struct inpcb *inp, const char *event, int error); |
59 | extern void udp_log_connection_summary(struct inpcb *inp); |
60 | |
61 | static inline bool |
62 | udp_is_log_enabled(struct inpcb *inp, uint32_t req_flags) |
63 | { |
64 | if (inp == NULL) { |
65 | return false; |
66 | } |
67 | /* |
68 | * First find out the kind of destination |
69 | */ |
70 | if (inp->inp_log_flags == 0) { |
71 | if (inp->inp_vflag & INP_IPV6) { |
72 | if (IN6_IS_ADDR_LOOPBACK(&inp->in6p_laddr) || |
73 | IN6_IS_ADDR_LOOPBACK(&inp->in6p_faddr)) { |
74 | inp->inp_log_flags |= ULEF_DST_LOOPBACK; |
75 | } |
76 | } else { |
77 | if (ntohl(inp->inp_laddr.s_addr) == INADDR_LOOPBACK || |
78 | ntohl(inp->inp_faddr.s_addr) == INADDR_LOOPBACK) { |
79 | inp->inp_log_flags |= ULEF_DST_LOOPBACK; |
80 | } |
81 | } |
82 | /* We only check for loopback */ |
83 | if (inp->inp_log_flags == 0) { |
84 | inp->inp_log_flags |= ULEF_DST_LOCAL | ULEF_DST_GW; |
85 | } |
86 | } |
87 | /* |
88 | * Check separately the destination flags that are per TCP connection |
89 | * and the other functional flags that are global |
90 | */ |
91 | return (inp->inp_log_flags & udp_log_enable_flags & ULEF_MASK_DST) && |
92 | (udp_log_enable_flags & (req_flags & ~ULEF_MASK_DST)); |
93 | } |
94 | |
95 | #define UDP_LOG_BIND(inp, error) if (udp_is_log_enabled(inp, ULEF_BIND)) \ |
96 | udp_log_connection((inp), "bind", (error)) |
97 | |
98 | #define UDP_LOG_CONNECT(inp, error) if (udp_is_log_enabled(inp, ULEF_CONNECTION)) \ |
99 | udp_log_connection((inp), "connect", (error)) |
100 | |
101 | #define UDP_LOG_CONNECTION_SUMMARY(inp) if (udp_is_log_enabled(inp, ULEF_CONNECTION)) \ |
102 | udp_log_connection_summary((inp)) |
103 | |
104 | |
105 | #endif /* _NETINET_UDP_LOG_H_ */ |
106 | |