1 /* $OpenBSD: imsg.h,v 1.3 2013/12/26 17:32:33 eric Exp $ */
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>
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.
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.
26 #define IBUF_READ_SIZE 65535
27 #define IMSG_HEADER_SIZE sizeof(struct imsg_hdr)
28 #define MAX_IMSGSIZE 16384
31 TAILQ_ENTRY(ibuf) entry;
41 TAILQ_HEAD(, ibuf) bufs;
47 u_char buf[IBUF_READ_SIZE];
53 TAILQ_ENTRY(imsg_fd) entry;
58 TAILQ_HEAD(, imsg_fd) fds;
83 struct ibuf *ibuf_open(size_t);
84 struct ibuf *ibuf_dynamic(size_t, size_t);
85 int ibuf_add(struct ibuf *, const void *, size_t);
86 void *ibuf_reserve(struct ibuf *, size_t);
87 void *ibuf_seek(struct ibuf *, size_t, size_t);
88 size_t ibuf_size(struct ibuf *);
89 size_t ibuf_left(struct ibuf *);
90 void ibuf_close(struct msgbuf *, struct ibuf *);
91 int ibuf_write(struct msgbuf *);
92 void ibuf_free(struct ibuf *);
93 void msgbuf_init(struct msgbuf *);
94 void msgbuf_clear(struct msgbuf *);
95 int msgbuf_write(struct msgbuf *);
96 void msgbuf_drain(struct msgbuf *, size_t);
99 void imsg_init(struct imsgbuf *, int);
100 ssize_t imsg_read(struct imsgbuf *);
101 ssize_t imsg_get(struct imsgbuf *, struct imsg *);
102 int imsg_compose(struct imsgbuf *, u_int32_t, u_int32_t, pid_t,
103 int, const void *, u_int16_t);
104 int imsg_composev(struct imsgbuf *, u_int32_t, u_int32_t, pid_t,
105 int, const struct iovec *, int);
106 struct ibuf *imsg_create(struct imsgbuf *, u_int32_t, u_int32_t, pid_t,
108 int imsg_add(struct ibuf *, const void *, u_int16_t);
109 void imsg_close(struct imsgbuf *, struct ibuf *);
110 void imsg_free(struct imsg *);
111 int imsg_flush(struct imsgbuf *);
112 void imsg_clear(struct imsgbuf *);