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8429abe0 RW |
1 | /* $OpenBSD$ */ |
2 | ||
3 | /* | |
4 | * Copyright (c) 2006, 2007 Pierre-Yves Ritschard <pyr@openbsd.org> | |
5 | * Copyright (c) 2006, 2007, 2008 Reyk Floeter <reyk@openbsd.org> | |
6 | * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org> | |
7 | * | |
8 | * Permission to use, copy, modify, and distribute this software for any | |
9 | * purpose with or without fee is hereby granted, provided that the above | |
10 | * copyright notice and this permission notice appear in all copies. | |
11 | * | |
12 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
13 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
14 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
15 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
16 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
17 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
18 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
19 | */ | |
20 | ||
21 | #ifndef _IMSG_H_ | |
22 | #define _IMSG_H_ | |
23 | ||
24 | #define IBUF_READ_SIZE 65535 | |
25 | #define IMSG_HEADER_SIZE sizeof(struct imsg_hdr) | |
26 | #define MAX_IMSGSIZE 16384 | |
27 | ||
28 | struct ibuf { | |
996c9314 | 29 | TAILQ_ENTRY(ibuf) entry; |
d7c0a89a | 30 | uint8_t *buf; |
996c9314 LB |
31 | size_t size; |
32 | size_t max; | |
33 | size_t wpos; | |
34 | size_t rpos; | |
35 | int fd; | |
8429abe0 RW |
36 | }; |
37 | ||
38 | struct msgbuf { | |
996c9314 | 39 | TAILQ_HEAD(, ibuf) bufs; |
d7c0a89a | 40 | uint32_t queued; |
996c9314 | 41 | int fd; |
8429abe0 RW |
42 | }; |
43 | ||
44 | struct ibuf_read { | |
d7c0a89a QY |
45 | uint8_t buf[IBUF_READ_SIZE]; |
46 | uint8_t *rptr; | |
996c9314 | 47 | size_t wpos; |
8429abe0 RW |
48 | }; |
49 | ||
50 | struct imsg_fd { | |
996c9314 LB |
51 | TAILQ_ENTRY(imsg_fd) entry; |
52 | int fd; | |
8429abe0 RW |
53 | }; |
54 | ||
55 | struct imsgbuf { | |
996c9314 LB |
56 | TAILQ_HEAD(, imsg_fd) fds; |
57 | struct ibuf_read r; | |
58 | struct msgbuf w; | |
59 | int fd; | |
60 | pid_t pid; | |
8429abe0 RW |
61 | }; |
62 | ||
63 | #define IMSGF_HASFD 1 | |
64 | ||
65 | struct imsg_hdr { | |
d7c0a89a QY |
66 | uint32_t type; |
67 | uint16_t len; | |
68 | uint16_t flags; | |
69 | uint32_t peerid; | |
70 | uint32_t pid; | |
8429abe0 RW |
71 | }; |
72 | ||
73 | struct imsg { | |
996c9314 LB |
74 | struct imsg_hdr hdr; |
75 | int fd; | |
76 | void *data; | |
8429abe0 RW |
77 | }; |
78 | ||
79 | ||
80 | /* buffer.c */ | |
996c9314 LB |
81 | struct ibuf *ibuf_open(size_t); |
82 | struct ibuf *ibuf_dynamic(size_t, size_t); | |
83 | int ibuf_add(struct ibuf *, const void *, size_t); | |
84 | void *ibuf_reserve(struct ibuf *, size_t); | |
85 | void *ibuf_seek(struct ibuf *, size_t, size_t); | |
86 | size_t ibuf_size(struct ibuf *); | |
87 | size_t ibuf_left(struct ibuf *); | |
88 | void ibuf_close(struct msgbuf *, struct ibuf *); | |
89 | int ibuf_write(struct msgbuf *); | |
90 | void ibuf_free(struct ibuf *); | |
91 | void msgbuf_init(struct msgbuf *); | |
92 | void msgbuf_clear(struct msgbuf *); | |
93 | int msgbuf_write(struct msgbuf *); | |
94 | void msgbuf_drain(struct msgbuf *, size_t); | |
8429abe0 RW |
95 | |
96 | /* imsg.c */ | |
996c9314 LB |
97 | void imsg_init(struct imsgbuf *, int); |
98 | ssize_t imsg_read(struct imsgbuf *); | |
99 | ssize_t imsg_get(struct imsgbuf *, struct imsg *); | |
d7c0a89a QY |
100 | int imsg_compose(struct imsgbuf *, uint32_t, uint32_t, pid_t, int, const void *, |
101 | uint16_t); | |
102 | int imsg_composev(struct imsgbuf *, uint32_t, uint32_t, pid_t, int, | |
996c9314 | 103 | const struct iovec *, int); |
d7c0a89a QY |
104 | struct ibuf *imsg_create(struct imsgbuf *, uint32_t, uint32_t, pid_t, uint16_t); |
105 | int imsg_add(struct ibuf *, const void *, uint16_t); | |
996c9314 LB |
106 | void imsg_close(struct imsgbuf *, struct ibuf *); |
107 | void imsg_free(struct imsg *); | |
108 | int imsg_flush(struct imsgbuf *); | |
109 | void imsg_clear(struct imsgbuf *); | |
8429abe0 RW |
110 | |
111 | #endif |