1 /*
2 * Copyright (c) 2024 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 _NET_DROPTAP_H_
30 #define _NET_DROPTAP_H_
31
32 #ifdef PRIVATE
33 #include <net/pktap.h>
34
35 #define DROPTAP_IFNAME "droptap"
36 #define DROPTAP_IFXNAMESIZE (IF_NAMESIZE + 8)
37
38 #define DROPTAP_DROPFUNC_MAXLEN 64
39
40 /*
41 * Droptap header is a special type of pktap header with droptap-specific
42 * metadata.
43 */
44 struct droptap_header {
45 struct pktap_header dth_pktap_hdr;
46 uint32_t dth_dropreason;
47 uint8_t dth_dropfunc_size;
48 uint16_t dth_dropline;
49 char dth_dropfunc[DROPTAP_DROPFUNC_MAXLEN];
50 };
51
52 /*
53 * If we do not want to store function name and line number, client should pass
54 * NULL to dropfunc, and then droptap internally sets dth_dropfunc_size to 0 and
55 * copies fields up to dth_dropfunc_size to bpf.
56 */
57 #define DROPTAP_HDR_SIZE(dtaphdr) \
58 (((dtaphdr)->dth_dropfunc_size == 0) ? \
59 (__offsetof(struct droptap_header, dth_dropfunc_size) + sizeof((dtaphdr)->dth_dropfunc_size)) : \
60 (__offsetof(struct droptap_header, dth_dropfunc) + (dtaphdr)->dth_dropfunc_size + 1))
61
62 /*
63 * Drop Reason is a 32-bit encoding of drop code, domain, and component.
64 *
65 * Reserved Component Domain Drop Code
66 * ╭─────────┬─────────┬─────────────┬───────────────╮
67 * │ 4 │ 4 │ 8 │ 16 │
68 * ╰─────────┴─────────┴─────────────┴───────────────╯
69 * ╰─────────────────────────────────────────────────╯
70 * Drop Reason
71 *
72 * [ 15:0] Drop Code: Specific reason why the drop happened (e.g. AQM full)
73 * [23:16] Domain : Which domain the drop happened (e.g. Flowswitch, TCP, IP)
74 * [27:24] Component: Which component the drop happened (e.g. Skywalk, BSD, driver)
75 * [31:28] Reserved : Reserved for future use
76 *
77 */
78 #define DROP_COMPONENT_MASK 0x0f000000
79 #define DROP_COMPONENT_OFFSET 24
80 #define DROP_COMPONENT_MAX 0x0f
81 #define DROP_DOMAIN_MASK 0x00ff0000
82 #define DROP_DOMAIN_OFFSET 16
83 #define DROP_DOMAIN_MAX 0xff
84 #define DROP_CODE_MASK 0x0000ffff
85 #define DROP_CODE_OFFSET 0
86 #define DROP_CODE_MAX 0xffff
87
88 /* 32-bit Drop Reason */
89 #define DROP_REASON(component, domain, code) \
90 (((unsigned)((component) & 0x0f) << DROP_COMPONENT_OFFSET) | \
91 ((unsigned)((domain) & 0xff) << DROP_DOMAIN_OFFSET) | \
92 ((unsigned)((code) & 0xffff) << DROP_CODE_OFFSET))
93
94 /* All components */
95 #define DROPTAP_SKYWALK 1
96 #define DROPTAP_BSD 2
97
98 /* All domains for Skywalk component */
99 #define DROPTAP_FSW 1
100 #define DROPTAP_NETIF 2
101 #define _DROPTAP_PAD_3 3
102 #define _DROPTAP_PAD_4 4
103 #define DROPTAP_AQM 5
104
105 /* All domains for BSD component */
106 #define DROPTAP_TCP 1
107 #define DROPTAP_UDP 2
108 #define DROPTAP_IP 3
109 #define DROPTAP_SOCK 4
110 #define DROPTAP_DLIL 5
111 #define DROPTAP_IPSEC 6
112 #define DROPTAP_IP6 7
113 #define DROPTAP_MPTCP 8
114
115 #define DROPTAP_UNSPEC 0
116
117 #define DROP_REASON_LIST \
118 X(DROP_REASON_UNSPECIFIED, DROPTAP_UNSPEC, DROPTAP_UNSPEC, DROPTAP_UNSPEC, "Drop reason not specified") \
119 /* Skywalk component */ \
120 X(DROP_REASON_FSW_PP_ALLOC_FAILED, DROPTAP_SKYWALK, DROPTAP_FSW, 1, "Flowswitch packet alloc failed") \
121 X(DROP_REASON_RX_DST_RING_FULL, DROPTAP_SKYWALK, DROPTAP_FSW, 2, "Flowswitch Rx destination ring full") \
122 X(DROP_REASON_FSW_QUIESCED, DROPTAP_SKYWALK, DROPTAP_FSW, 3, "Flowswitch detached") \
123 X(DROP_REASON_FSW_IFNET_NOT_ATTACHED, DROPTAP_SKYWALK, DROPTAP_FSW, 4, "Flowswitch ifnet not attached") \
124 X(DROP_REASON_FSW_DEMUX_FAILED, DROPTAP_SKYWALK, DROPTAP_FSW, 5, "Flowswitch demux error") \
125 X(DROP_REASON_FSW_TX_DEVPORT_NOT_ATTACHED, DROPTAP_SKYWALK, DROPTAP_FSW, 6, "Flowswitch destination nexus port inactive") \
126 X(DROP_REASON_FSW_TX_FLOW_EXTRACT_FAILED, DROPTAP_SKYWALK, DROPTAP_FSW, 7, "Flowswitch flow extract error") \
127 X(DROP_REASON_FSW_TX_FRAG_BAD_CONT, DROPTAP_SKYWALK, DROPTAP_FSW, 8, "Flowswitch invalid continuation fragment") \
128 X(DROP_REASON_FSW_TX_FLOW_NOT_FOUND, DROPTAP_SKYWALK, DROPTAP_FSW, 9, "Flowswitch flow lookup failed") \
129 X(DROP_REASON_FSW_TX_RESOLV_PENDING, DROPTAP_SKYWALK, DROPTAP_FSW, 10, "Flowswitch resolution pending") \
130 X(DROP_REASON_FSW_TX_RESOLV_FAILED, DROPTAP_SKYWALK, DROPTAP_FSW, 11, "Flowswitch resolution failed") \
131 X(DROP_REASON_FSW_FLOW_NONVIABLE, DROPTAP_SKYWALK, DROPTAP_FSW, 12, "Flowswitch flow not viable") \
132 X(DROP_REASON_FSW_RX_RING_NOT_FOUND, DROPTAP_SKYWALK, DROPTAP_FSW, 13, "Flowswitch Rx ring not found") \
133 X(DROP_REASON_FSW_RX_PKT_NOT_FINALIZED, DROPTAP_SKYWALK, DROPTAP_FSW, 14, "Flowswitch packet not finalized") \
134 X(DROP_REASON_FSW_FLOW_TRACK_ERR, DROPTAP_SKYWALK, DROPTAP_FSW, 15, "Flowswitch flow tracker error") \
135 X(DROP_REASON_FSW_PKT_COPY_FAILED, DROPTAP_SKYWALK, DROPTAP_FSW, 16, "Flowswitch packet copy failed") \
136 X(DROP_REASON_FSW_GSO_FAILED, DROPTAP_SKYWALK, DROPTAP_FSW, 17, "Flowswitch GSO failed") \
137 X(DROP_REASON_FSW_GSO_NOMEM_PKT, DROPTAP_SKYWALK, DROPTAP_FSW, 18, "Flowswitch GSO not enough packet memory") \
138 X(DROP_REASON_FSW_GSO_NOMEM_MBUF, DROPTAP_SKYWALK, DROPTAP_FSW, 19, "Flowswitch GSO not enough mbuf memory") \
139 X(DROP_REASON_FSW_DST_NXPORT_INVALID, DROPTAP_SKYWALK, DROPTAP_FSW, 20, "Flowswitch dst nexus port invalid") \
140 X(DROP_REASON_AQM_FULL, DROPTAP_SKYWALK, DROPTAP_AQM, 1, "AQM full") \
141 X(DROP_REASON_AQM_COMPRESSED, DROPTAP_SKYWALK, DROPTAP_AQM, 2, "AQM compressed") \
142 X(DROP_REASON_AQM_BK_SYS_THROTTLED, DROPTAP_SKYWALK, DROPTAP_AQM, 3, "AQM BK_SYS throttled") \
143 X(DROP_REASON_AQM_PURGE_FLOW, DROPTAP_SKYWALK, DROPTAP_AQM, 4, "AQM purge flow") \
144 X(DROP_REASON_AQM_DROP, DROPTAP_SKYWALK, DROPTAP_AQM, 5, "AQM drop") \
145 /* Socket */ \
146 X(DROP_REASON_FULL_SOCK_RCVBUF, DROPTAP_BSD, DROPTAP_SOCK, 1, "Socket receive buffer full") \
147 /* DLIL */ \
148 X(DROP_REASON_DLIL_BURST_LIMIT, DROPTAP_BSD, DROPTAP_DLIL, 1, "DLIL burst limit exceeded") \
149 X(DROP_REASON_DLIL_ENQUEUE_INVALID, DROPTAP_BSD, DROPTAP_DLIL, 2, "DLIL enqueue invalid") \
150 X(DROP_REASON_DLIL_ENQUEUE_IF_NOT_ATTACHED, DROPTAP_BSD, DROPTAP_DLIL, 3, "DLIL enqueue interface not fully attached") \
151 X(DROP_REASON_DLIL_ENQUEUE_IF_NOT_UP, DROPTAP_BSD, DROPTAP_DLIL, 4, "DLIL enqueue interface not up") \
152 X(DROP_REASON_DLIL_IF_FILTER, DROPTAP_BSD, DROPTAP_DLIL, 5, "DLIL interface filter") \
153 X(DROP_REASON_DLIL_IF_DATAMOV_BEGIN, DROPTAP_BSD, DROPTAP_DLIL, 6, "DLIL interface datamove begin") \
154 X(DROP_REASON_DLIL_CLAT64, DROPTAP_BSD, DROPTAP_DLIL, 7, "DLIL CLAT46") \
155 X(DROP_REASON_DLIL_PROMISC, DROPTAP_BSD, DROPTAP_DLIL, 8, "DLIL promiscuous") \
156 X(DROP_REASON_DLIL_NO_PROTO, DROPTAP_BSD, DROPTAP_DLIL, 9, "DLIL no protocol") \
157 X(DROP_REASON_DLIL_PRE_OUTPUT, DROPTAP_BSD, DROPTAP_DLIL, 10, "DLIL pre output") \
158 X(DROP_REASON_DLIL_IF_FRAMER, DROPTAP_BSD, DROPTAP_DLIL, 11, "DLIL interface framer") \
159 X(DROP_REASON_DLIL_TSO_NOT_OK, DROPTAP_BSD, DROPTAP_DLIL, 12, "DLIL interface TSO not OK") \
160 /* MPTCP */ \
161 X(DROP_REASON_MPTCP_INPUT_MALFORMED, DROPTAP_BSD, DROPTAP_MPTCP,1, "MPTCP input packet malformed") \
162 /* TCP */ \
163 X(DROP_REASON_TCP_RST, DROPTAP_BSD, DROPTAP_TCP, 1, "TCP connection reset") \
164 X(DROP_REASON_TCP_REASSEMBLY_ALLOC, DROPTAP_BSD, DROPTAP_TCP, 2, "TCP reassembly allocation") \
165 X(DROP_REASON_TCP_NECP, DROPTAP_BSD, DROPTAP_TCP, 3, "TCP NECP not allowed") \
166 X(DROP_REASON_TCP_PKT_UNSENT, DROPTAP_BSD, DROPTAP_TCP, 4, "TCP unsent packet") \
167 X(DROP_REASON_TCP_SRC_ADDR_NOT_AVAIL, DROPTAP_BSD, DROPTAP_TCP, 5, "TCP source address not available") \
168 X(DROP_REASON_TCP_REASS_OVERFLOW, DROPTAP_BSD, DROPTAP_TCP, 6, "TCP reassembly queue overflow") \
169 X(DROP_REASON_TCP_CHECKSUM_INCORRECT, DROPTAP_BSD, DROPTAP_TCP, 7, "TCP checksum incorrect") \
170 X(DROP_REASON_TCP_SRC_ADDR_UNSPECIFIED, DROPTAP_BSD, DROPTAP_TCP, 8, "TCP source address unspecified") \
171 X(DROP_REASON_TCP_OFFSET_INCORRECT, DROPTAP_BSD, DROPTAP_TCP, 9, "TCP offset incorrect") \
172 X(DROP_REASON_TCP_SYN_FIN, DROPTAP_BSD, DROPTAP_TCP, 10, "TCP SYN with FIN") \
173 X(DROP_REASON_TCP_NO_SOCK, DROPTAP_BSD, DROPTAP_TCP, 11, "TCP no socket") \
174 X(DROP_REASON_TCP_PCB_MISMATCH, DROPTAP_BSD, DROPTAP_TCP, 12, "TCP protocol control block mismatch") \
175 X(DROP_REASON_TCP_NO_PCB, DROPTAP_BSD, DROPTAP_TCP, 13, "TCP no protocol control block") \
176 X(DROP_REASON_TCP_CLOSED, DROPTAP_BSD, DROPTAP_TCP, 14, "TCP state CLOSED") \
177 X(DROP_REASON_TCP_FLAGS_INCORRECT, DROPTAP_BSD, DROPTAP_TCP, 15, "TCP flags incorrect") \
178 X(DROP_REASON_TCP_LISTENER_CLOSING, DROPTAP_BSD, DROPTAP_TCP, 16, "TCP listener closing") \
179 X(DROP_REASON_TCP_SYN_RST, DROPTAP_BSD, DROPTAP_TCP, 17, "TCP SYN with RST") \
180 X(DROP_REASON_TCP_SYN_ACK_LISTENER, DROPTAP_BSD, DROPTAP_TCP, 18, "TCP SYN with ACK for listener") \
181 X(DROP_REASON_TCP_LISTENER_NO_SYN, DROPTAP_BSD, DROPTAP_TCP, 19, "TCP no SYN for listener") \
182 X(DROP_REASON_TCP_SAME_PORT, DROPTAP_BSD, DROPTAP_TCP, 20, "TCP same source and destination ports") \
183 X(DROP_REASON_TCP_BCAST_MCAST, DROPTAP_BSD, DROPTAP_TCP, 21, "TCP address not unicast") \
184 X(DROP_REASON_TCP_DEPRECATED_ADDR, DROPTAP_BSD, DROPTAP_TCP, 22, "TCP address deprecated") \
185 X(DROP_REASON_TCP_LISTENER_DROP, DROPTAP_BSD, DROPTAP_TCP, 23, "TCP listener drop") \
186 X(DROP_REASON_TCP_PCB_HASH_FAILED, DROPTAP_BSD, DROPTAP_TCP, 24, "TCP protocol control block hash") \
187 X(DROP_REASON_TCP_CONTENT_FILTER_ATTACH, DROPTAP_BSD, DROPTAP_TCP, 25, "TCP control filter attach") \
188 X(DROP_REASON_TCP_BIND_IN_PROGRESS, DROPTAP_BSD, DROPTAP_TCP, 26, "TCP bind in progress") \
189 X(DROP_REASON_TCP_MEM_ALLOC, DROPTAP_BSD, DROPTAP_TCP, 27, "TCP memory allocation") \
190 X(DROP_REASON_TCP_PCB_CONNECT, DROPTAP_BSD, DROPTAP_TCP, 28, "TCP protocol control block connect") \
191 X(DROP_REASON_TCP_SYN_RECEIVED_BAD_ACK, DROPTAP_BSD, DROPTAP_TCP, 29, "TCP SYN_RECEIVED bad ACK") \
192 X(DROP_REASON_TCP_SYN_SENT_BAD_ACK, DROPTAP_BSD, DROPTAP_TCP, 30, "TCP SYN_SENT bad ACK") \
193 X(DROP_REASON_TCP_SYN_SENT_NO_SYN, DROPTAP_BSD, DROPTAP_TCP, 31, "TCP SYN_SENT no SYN") \
194 X(DROP_REASON_TCP_ACK_TOOMUCH, DROPTAP_BSD, DROPTAP_TCP, 32, "TCP ACK rate limit") \
195 X(DROP_REASON_TCP_OLD_ACK, DROPTAP_BSD, DROPTAP_TCP, 33, "TCP challenge ACK") \
196 X(DROP_REASON_TCP_SYN_DATA_INVALID, DROPTAP_BSD, DROPTAP_TCP, 34, "TCP SYN data invalid") \
197 X(DROP_REASON_TCP_SYN_RECEIVED_BAD_SEQ, DROPTAP_BSD, DROPTAP_TCP, 35, "TCP SYN_RECEIVED bad sequence number") \
198 X(DROP_REASON_TCP_RECV_AFTER_CLOSE, DROPTAP_BSD, DROPTAP_TCP, 36, "TCP receive after close") \
199 X(DROP_REASON_TCP_BAD_ACK, DROPTAP_BSD, DROPTAP_TCP, 37, "TCP bad ACK") \
200 X(DROP_REASON_TCP_BAD_RST, DROPTAP_BSD, DROPTAP_TCP, 38, "TCP bad RST") \
201 X(DROP_REASON_TCP_PAWS, DROPTAP_BSD, DROPTAP_TCP, 39, "TCP PAWS") \
202 X(DROP_REASON__TCP_REASS_MEMORY_PRESSURE, DROPTAP_BSD, DROPTAP_TCP, 40, "TCP reassembly queue memory pressure") \
203 /* IP */ \
204 X(DROP_REASON_IP_UNKNOWN_MULTICAST_GROUP, DROPTAP_BSD, DROPTAP_IP, 2, "IP unknown multicast group join") \
205 X(DROP_REASON_IP_INVALID_ADDR, DROPTAP_BSD, DROPTAP_IP, 3, "Invalid IP address") \
206 X(DROP_REASON_IP_TOO_SHORT, DROPTAP_BSD, DROPTAP_IP, 4, "IP packet too short") \
207 X(DROP_REASON_IP_TOO_SMALL, DROPTAP_BSD, DROPTAP_IP, 5, "IP header too small") \
208 X(DROP_REASON_IP_RCV_IF_NO_MATCH, DROPTAP_BSD, DROPTAP_IP, 6, "IP receive interface no match") \
209 X(DROP_REASON_IP_CANNOT_FORWARD, DROPTAP_BSD, DROPTAP_IP, 7, "IP cannot forward") \
210 X(DROP_REASON_IP_BAD_VERSION, DROPTAP_BSD, DROPTAP_IP, 8, "IP bad version") \
211 X(DROP_REASON_IP_BAD_CHECKSUM, DROPTAP_BSD, DROPTAP_IP, 9, "IP bad checksum") \
212 X(DROP_REASON_IP_BAD_HDR_LENGTH, DROPTAP_BSD, DROPTAP_IP, 10, "IP bad header length") \
213 X(DROP_REASON_IP_BAD_LENGTH, DROPTAP_BSD, DROPTAP_IP, 11, "IP bad length") \
214 X(DROP_REASON_IP_BAD_TTL, DROPTAP_BSD, DROPTAP_IP, 12, "IP bad TTL") \
215 X(DROP_REASON_IP_NO_PROTO, DROPTAP_BSD, DROPTAP_IP, 13, "IP unknown protocol") \
216 X(DROP_REASON_IP_FRAG_NOT_ACCEPTED, DROPTAP_BSD, DROPTAP_IP, 14, "IP fragment not accepted") \
217 X(DROP_REASON_IP_FRAG_DROPPED, DROPTAP_BSD, DROPTAP_IP, 15, "IP fragment dropped") \
218 X(DROP_REASON_IP_FRAG_TIMEOUT, DROPTAP_BSD, DROPTAP_IP, 16, "IP fragment timeout") \
219 X(DROP_REASON_IP_FRAG_TOO_MANY, DROPTAP_BSD, DROPTAP_IP, 17, "IP fragment too many") \
220 X(DROP_REASON_IP_FRAG_TOO_LONG, DROPTAP_BSD, DROPTAP_IP, 18, "IP fragment too long") \
221 X(DROP_REASON_IP_FRAG_DRAINED, DROPTAP_BSD, DROPTAP_IP, 19, "IP fragment drained") \
222 X(DROP_REASON_IP_FILTER_DROP, DROPTAP_BSD, DROPTAP_IP, 20, "IP filter drop") \
223 X(DROP_REASON_IP_FRAG_TOO_SMALL, DROPTAP_BSD, DROPTAP_IP, 21, "IP too small to fragment") \
224 X(DROP_REASON_IP_FRAG_NO_MEM, DROPTAP_BSD, DROPTAP_IP, 22, "IP no memory for fragmentation") \
225 X(DROP_REASON_IP_CANNOT_FRAGMENT, DROPTAP_BSD, DROPTAP_IP, 23, "IP cannot fragment") \
226 X(DROP_REASON_IP_OUTBOUND_IPSEC_POLICY, DROPTAP_BSD, DROPTAP_IP, 24, "IP outbound IPsec policy") \
227 X(DROP_REASON_IP_ZERO_NET, DROPTAP_BSD, DROPTAP_IP, 25, "IP to network zero") \
228 X(DROP_REASON_IP_SRC_ADDR_NO_AVAIL, DROPTAP_BSD, DROPTAP_IP, 26, "IP source address not available") \
229 X(DROP_REASON_IP_DST_ADDR_NO_AVAIL, DROPTAP_BSD, DROPTAP_IP, 27, "IP destination address not available") \
230 X(DROP_REASON_IP_TO_RESTRICTED_IF, DROPTAP_BSD, DROPTAP_IP, 28, "IP packet to a restricted interface") \
231 X(DROP_REASON_IP_NO_ROUTE, DROPTAP_BSD, DROPTAP_IP, 29, "IP no route") \
232 X(DROP_REASON_IP_IF_CANNOT_MULTICAST, DROPTAP_BSD, DROPTAP_IP, 30, "IP multicast not supported by interface") \
233 X(DROP_REASON_IP_SRC_ADDR_ANY, DROPTAP_BSD, DROPTAP_IP, 31, "IP source address any") \
234 X(DROP_REASON_IP_IF_CANNOT_BROADCAST, DROPTAP_BSD, DROPTAP_IP, 32, "IP broadcast not supported by interface") \
235 X(DROP_REASON_IP_BROADCAST_NOT_ALLOWED, DROPTAP_BSD, DROPTAP_IP, 33, "IP broadcast not allowed") \
236 X(DROP_REASON_IP_BROADCAST_TOO_BIG, DROPTAP_BSD, DROPTAP_IP, 34, "IP broadcast too big for MTU") \
237 X(DROP_REASON_IP_FILTER_TSO, DROPTAP_BSD, DROPTAP_IP, 35, "TSO packet to IP filter") \
238 X(DROP_REASON_IP_NECP_POLICY_NO_ALLOW_IF, DROPTAP_BSD, DROPTAP_IP, 36, "NECP not allowed on interface") \
239 X(DROP_REASON_IP_NECP_POLICY_DROP, DROPTAP_BSD, DROPTAP_IP, 37, "NECP drop") \
240 X(DROP_REASON_IP_NECP_POLICY_SOCKET_DIVERT, DROPTAP_BSD, DROPTAP_IP, 38, "NECP socket divert") \
241 X(DROP_REASON_IP_NECP_POLICY_TUN_NO_ALLOW_IF, DROPTAP_BSD, DROPTAP_IP, 39, "NECP tunnel not allowed on interface") \
242 X(DROP_REASON_IP_NECP_POLICY_TUN_REBIND_NO_ALLOW_IF, DROPTAP_BSD, DROPTAP_IP, 40, "NECP rebind not allowed on interface") \
243 X(DROP_REASON_IP_NECP_POLICY_TUN_NO_REBIND_IF, DROPTAP_BSD, DROPTAP_IP, 41, "NECP rebind not allowed on interface") \
244 X(DROP_REASON_IP_NECP_NO_ALLOW_IF, DROPTAP_BSD, DROPTAP_IP, 42, "NECP packet not allowed on interface") \
245 X(DROP_REASON_IP_ENOBUFS, DROPTAP_BSD, DROPTAP_IP, 43, "IP No buffer space available") \
246 X(DROP_REASON_IP_ILLEGAL_PORT, DROPTAP_BSD, DROPTAP_IP, 44, "IP Illegal port") \
247 X(DROP_REASON_IP_UNREACHABLE_PORT, DROPTAP_BSD, DROPTAP_IP, 45, "IP Unreachable port") \
248 X(DROP_REASON_IP_MULTICAST_NO_PORT, DROPTAP_BSD, DROPTAP_IP, 46, "IP Multicast no port") \
249 X(DROP_REASON_IP_EISCONN, DROPTAP_BSD, DROPTAP_IP, 47, "IP Socket is already connected") \
250 X(DROP_REASON_IP_EAFNOSUPPORT, DROPTAP_BSD, DROPTAP_IP, 48, "IP Address family not supported by protocol family") \
251 X(DROP_REASON_IP_NO_SOCK, DROPTAP_BSD, DROPTAP_IP, 49, "IP No matching sock") \
252 /* IPsec */ \
253 X(DROP_REASON_IPSEC_REJECT, DROPTAP_BSD, DROPTAP_IPSEC,1, "IPsec reject") \
254 /* IPv6 */ \
255 X(DROP_REASON_IP6_OPT_DISCARD, DROPTAP_BSD, DROPTAP_IP6, 1, "IPv6 discard option") \
256 X(DROP_REASON_IP6_IF_IPV6_DISABLED, DROPTAP_BSD, DROPTAP_IP6, 2, "IPv6 is disabled on the interface") \
257 X(DROP_REASON_IP6_BAD_SCOPE, DROPTAP_BSD, DROPTAP_IP6, 3, "IPv6 bad scope") \
258 X(DROP_REASON_IP6_UNPROXIED_NS, DROPTAP_BSD, DROPTAP_IP6, 4, "IPv6 unproxied mistargeted Neighbor Solicitation") \
259 X(DROP_REASON_IP6_BAD_OPTION, DROPTAP_BSD, DROPTAP_IP6, 5, "IPv6 bad option") \
260 X(DROP_REASON_IP6_TOO_MANY_OPTIONS, DROPTAP_BSD, DROPTAP_IP6, 6, "IPv6 too many header options") \
261 X(DROP_REASON_IP6_BAD_PATH_MTU, DROPTAP_BSD, DROPTAP_IP6, 7, "IPv6 bad path MTU") \
262 X(DROP_REASON_IP6_NO_PREFERRED_SRC_ADDR, DROPTAP_BSD, DROPTAP_IP6, 8, "IPv6 no preferred source address") \
263 X(DROP_REASON_IP6_BAD_HLIM, DROPTAP_BSD, DROPTAP_IP6, 9, "IPv6 bad HLIM") \
264 X(DROP_REASON_IP6_BAD_DAD, DROPTAP_BSD, DROPTAP_IP6, 10, "IPv6 bad DAD") \
265 X(DROP_REASON_IP6_NO_ND6ALT_IF, DROPTAP_BSD, DROPTAP_IP6, 11, "IPv6 no ND6ALT interface") \
266 X(DROP_REASON_IP6_BAD_ND_STATE, DROPTAP_BSD, DROPTAP_IP6, 12, "IPv6 Bad ND state") \
267 X(DROP_REASON_IP6_ONLY, DROPTAP_BSD, DROPTAP_IP6, 13, "IPv6 Only") \
268 X(DROP_REASON_IP6_ADDR_UNSPECIFIED, DROPTAP_BSD, DROPTAP_IP6, 14, "IPv6 Address is unspecified") \
269 X(DROP_REASON_IP6_FRAG_OVERLAPPING, DROPTAP_BSD, DROPTAP_IP6, 15, "IPv6 Fragment overlaping") \
270 X(DROP_REASON_IP6_FRAG_MIXED_CE, DROPTAP_BSD, DROPTAP_IP6, 16, "IPv6 Fragment mixed CE bits") \
271 /* UDP */ \
272 X(DROP_REASON_UDP_SET_PORT_FAILURE, DROPTAP_BSD, DROPTAP_UDP, 1, "UDP failed to set ephemeral port ") \
273 X(DROP_REASON_UDP_DST_PORT_ZERO, DROPTAP_BSD, DROPTAP_UDP, 2, "UDP destination port zero") \
274 X(DROP_REASON_UDP_BAD_LENGTH, DROPTAP_BSD, DROPTAP_UDP, 3, "UDP bad length") \
275 X(DROP_REASON_UDP_BAD_CHECKSUM, DROPTAP_BSD, DROPTAP_UDP, 4, "UDP bad checksum") \
276 X(DROP_REASON_UDP_PORT_UNREACHEABLE, DROPTAP_BSD, DROPTAP_UDP, 5, "UDP port unreachable") \
277 X(DROP_REASON_UDP_SOCKET_CLOSING, DROPTAP_BSD, DROPTAP_UDP, 6, "UDP socket closing") \
278 X(DROP_REASON_UDP_NECP, DROPTAP_BSD, DROPTAP_UDP, 7, "UDP denied by NECP") \
279 X(DROP_REASON_UDP_CANNOT_SAVE_CONTROL, DROPTAP_BSD, DROPTAP_UDP, 8, "UDP cannot save control mbufs") \
280 X(DROP_REASON_UDP_IPSEC, DROPTAP_BSD, DROPTAP_UDP, 9, "UDP IPsec") \
281
282 typedef enum drop_reason : uint32_t {
283 #define X(reason, component, domain, code, ...) \
284 reason = DROP_REASON(component, domain, code),
285 DROP_REASON_LIST
286 #undef X
287 } drop_reason_t;
288
289 __attribute__((always_inline))
290 static inline const char *
drop_reason_str(drop_reason_t value)291 drop_reason_str(drop_reason_t value)
292 {
293 switch (value) {
294 #define X(reason, ...) \
295 case (reason): return #reason;
296 DROP_REASON_LIST
297 #undef X
298 default:
299 return NULL;
300 }
301 ;
302 }
303
304 #ifdef BSD_KERNEL_PRIVATE
305
306 #define DROPTAP_FLAG_DIR_IN 0x0001
307 #define DROPTAP_FLAG_DIR_OUT 0x0002
308 #define DROPTAP_FLAG_L2_MISSING 0x0004
309
310 extern uint32_t droptap_total_tap_count;
311 extern uint32_t droptap_verbose;
312
313 extern void droptap_init(void);
314 #if SKYWALK
315 #include <skywalk/os_skywalk.h>
316 extern void droptap_input_packet(kern_packet_t, drop_reason_t, const char *,
317 uint16_t, uint16_t, struct ifnet *, pid_t, const char *,
318 pid_t, const char *, uint8_t, uint32_t);
319 extern void droptap_output_packet(kern_packet_t, drop_reason_t, const char *,
320 uint16_t, uint16_t, struct ifnet *, pid_t, const char *, pid_t, const char *,
321 uint8_t, uint32_t);
322 typedef void
323 (*drop_func_t)(kern_packet_t, drop_reason_t, const char *, uint16_t, uint16_t,
324 struct ifnet *, pid_t, const char *, pid_t, const char *,
325 uint8_t, uint32_t);
326 #endif /* SKYWALK */
327 extern void droptap_input_mbuf(struct mbuf *, drop_reason_t, const char *,
328 uint16_t, uint16_t, struct ifnet *, char *);
329 extern void droptap_output_mbuf(struct mbuf *, drop_reason_t, const char *,
330 uint16_t, uint16_t, struct ifnet *);
331
332
333 #endif /* BSD_KERNEL_PRIVATE */
334 #endif /* PRIVATE */
335 #endif /* _NET_DROPTAP_H */
336