1 | /* |
2 | * Copyright (c) 2016-2018 Apple Inc. All rights reserved. |
3 | * |
4 | * @APPLE_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. Please obtain a copy of the License at |
10 | * http://www.opensource.apple.com/apsl/ and read it before using this |
11 | * file. |
12 | * |
13 | * The Original Code and all software distributed under the License are |
14 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
15 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
16 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
17 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
18 | * Please see the License for the specific language governing rights and |
19 | * limitations under the License. |
20 | * |
21 | * @APPLE_LICENSE_HEADER_END@ |
22 | */ |
23 | |
24 | #ifndef __PBUF_H__ |
25 | #define __PBUF_H__ |
26 | |
27 | #include <sys/mbuf.h> |
28 | |
29 | enum pbuf_type { |
30 | PBUF_TYPE_ZOMBIE = 0, |
31 | PBUF_TYPE_MBUF, |
32 | PBUF_TYPE_MEMORY |
33 | }; |
34 | |
35 | enum pbuf_action { |
36 | PBUF_ACTION_DESTROY |
37 | }; |
38 | |
39 | #define PBUF_ACTION_RV_SUCCESS 0 |
40 | #define PBUF_ACTION_RV_FAILURE (-1) |
41 | |
42 | struct pbuf_memory { |
43 | uint8_t *pm_buffer; // Pointer to start of buffer |
44 | u_int pm_buffer_len; // Total length of buffer |
45 | u_int pm_offset; // Offset to start of payload |
46 | u_int pm_len; // Length of payload |
47 | uint32_t pm_csum_flags; |
48 | uint32_t pm_csum_data; |
49 | uint8_t pm_proto; |
50 | uint8_t pm_flowsrc; |
51 | uint32_t pm_flowid; |
52 | uint32_t pm_flags; |
53 | struct pf_mtag pm_pftag; |
54 | int (*pm_action)(struct pbuf_memory *, enum pbuf_action); |
55 | void *pm_action_cookie; |
56 | }; |
57 | |
58 | typedef struct pbuf { |
59 | enum pbuf_type pb_type; |
60 | union { |
61 | struct mbuf *pbu_mbuf; |
62 | struct pbuf_memory pbu_memory; |
63 | } pb_u; |
64 | #define pb_mbuf pb_u.pbu_mbuf |
65 | #define pb_memory pb_u.pbu_memory |
66 | |
67 | void *pb_data; |
68 | uint32_t pb_packet_len; |
69 | uint32_t pb_contig_len; |
70 | uint32_t *pb_csum_flags; |
71 | uint32_t *pb_csum_data; /* data field used by csum routines */ |
72 | uint8_t *pb_proto; |
73 | uint8_t *pb_flowsrc; |
74 | uint32_t *pb_flowid; |
75 | uint32_t *pb_flags; |
76 | struct pf_mtag *pb_pftag; |
77 | struct ifnet *pb_ifp; |
78 | struct pbuf *pb_next; |
79 | |
80 | } pbuf_t; |
81 | |
82 | #define pbuf_is_valid(pb) (!((pb) == NULL || (pb)->pb_type == PBUF_TYPE_ZOMBIE)) |
83 | |
84 | void pbuf_init_mbuf(pbuf_t *, struct mbuf *, struct ifnet *); |
85 | void pbuf_init_memory(pbuf_t *, const struct pbuf_memory *, |
86 | struct ifnet *); |
87 | void pbuf_destroy(pbuf_t *); |
88 | void pbuf_sync(pbuf_t *); |
89 | |
90 | struct mbuf *pbuf_to_mbuf(pbuf_t *, boolean_t); |
91 | struct mbuf *pbuf_clone_to_mbuf(pbuf_t *); |
92 | |
93 | void * pbuf_ensure_contig(pbuf_t *, size_t); |
94 | void * pbuf_ensure_writable(pbuf_t *, size_t); |
95 | |
96 | void * pbuf_resize_segment(pbuf_t *, int off, int olen, int nlen); |
97 | void * pbuf_contig_segment(pbuf_t *, int off, int len); |
98 | |
99 | void pbuf_copy_data(pbuf_t *, int, int, void *); |
100 | void pbuf_copy_back(pbuf_t *, int, int, void *); |
101 | |
102 | uint16_t pbuf_inet_cksum(const pbuf_t *, uint32_t, uint32_t, uint32_t); |
103 | uint16_t pbuf_inet6_cksum(const pbuf_t *, uint32_t, uint32_t, uint32_t); |
104 | |
105 | mbuf_svc_class_t pbuf_get_service_class(const pbuf_t *); |
106 | |
107 | #endif /* __PBUF_H__ */ |
108 | |