mirror of https://github.com/omar-polo/gmid.git
159 lines
5.2 KiB
C
159 lines
5.2 KiB
C
/* $OpenBSD: imsg.h,v 1.8 2023/12/12 15:47:41 claudio Exp $ */
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/*
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* Copyright (c) 2023 Claudio Jeker <claudio@openbsd.org>
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* Copyright (c) 2006, 2007 Pierre-Yves Ritschard <pyr@openbsd.org>
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* Copyright (c) 2006, 2007, 2008 Reyk Floeter <reyk@openbsd.org>
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* Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifndef _IMSG_H_
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#define _IMSG_H_
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#include <sys/types.h>
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#define IBUF_READ_SIZE 65535
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#define IMSG_HEADER_SIZE sizeof(struct imsg_hdr)
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#define MAX_IMSGSIZE 16384
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struct ibuf {
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TAILQ_ENTRY(ibuf) entry;
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unsigned char *buf;
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size_t size;
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size_t max;
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size_t wpos;
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size_t rpos;
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int fd;
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};
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struct msgbuf {
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TAILQ_HEAD(, ibuf) bufs;
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uint32_t queued;
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int fd;
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};
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struct ibuf_read {
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unsigned char buf[IBUF_READ_SIZE];
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unsigned char *rptr;
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size_t wpos;
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};
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struct imsg_fd;
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struct imsgbuf {
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TAILQ_HEAD(, imsg_fd) fds;
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struct ibuf_read r;
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struct msgbuf w;
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int fd;
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pid_t pid;
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};
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#define IMSGF_HASFD 1
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struct imsg_hdr {
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uint32_t type;
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uint16_t len;
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uint16_t flags;
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uint32_t peerid;
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uint32_t pid;
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};
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struct imsg {
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struct imsg_hdr hdr;
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int fd;
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void *data;
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struct ibuf *buf;
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};
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struct iovec;
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/* imsg-buffer.c */
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struct ibuf *ibuf_open(size_t);
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struct ibuf *ibuf_dynamic(size_t, size_t);
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int ibuf_add(struct ibuf *, const void *, size_t);
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int ibuf_add_buf(struct ibuf *, const struct ibuf *);
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int ibuf_add_ibuf(struct ibuf *, const struct ibuf *);
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int ibuf_add_zero(struct ibuf *, size_t);
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int ibuf_add_n8(struct ibuf *, uint64_t);
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int ibuf_add_n16(struct ibuf *, uint64_t);
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int ibuf_add_n32(struct ibuf *, uint64_t);
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int ibuf_add_n64(struct ibuf *, uint64_t);
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int ibuf_add_h16(struct ibuf *, uint64_t);
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int ibuf_add_h32(struct ibuf *, uint64_t);
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int ibuf_add_h64(struct ibuf *, uint64_t);
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void *ibuf_reserve(struct ibuf *, size_t);
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void *ibuf_seek(struct ibuf *, size_t, size_t);
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int ibuf_set(struct ibuf *, size_t, const void *, size_t);
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int ibuf_set_n8(struct ibuf *, size_t, uint64_t);
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int ibuf_set_n16(struct ibuf *, size_t, uint64_t);
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int ibuf_set_n32(struct ibuf *, size_t, uint64_t);
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int ibuf_set_n64(struct ibuf *, size_t, uint64_t);
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int ibuf_set_h16(struct ibuf *, size_t, uint64_t);
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int ibuf_set_h32(struct ibuf *, size_t, uint64_t);
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int ibuf_set_h64(struct ibuf *, size_t, uint64_t);
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void *ibuf_data(const struct ibuf *);
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size_t ibuf_size(const struct ibuf *);
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size_t ibuf_left(const struct ibuf *);
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int ibuf_truncate(struct ibuf *, size_t);
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void ibuf_rewind(struct ibuf *);
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void ibuf_close(struct msgbuf *, struct ibuf *);
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void ibuf_from_buffer(struct ibuf *, void *, size_t);
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void ibuf_from_ibuf(struct ibuf *, const struct ibuf *);
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int ibuf_get(struct ibuf *, void *, size_t);
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int ibuf_get_ibuf(struct ibuf *, size_t, struct ibuf *);
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int ibuf_get_n8(struct ibuf *, uint8_t *);
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int ibuf_get_n16(struct ibuf *, uint16_t *);
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int ibuf_get_n32(struct ibuf *, uint32_t *);
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int ibuf_get_n64(struct ibuf *, uint64_t *);
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int ibuf_get_h16(struct ibuf *, uint16_t *);
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int ibuf_get_h32(struct ibuf *, uint32_t *);
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int ibuf_get_h64(struct ibuf *, uint64_t *);
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int ibuf_skip(struct ibuf *, size_t);
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void ibuf_free(struct ibuf *);
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int ibuf_fd_avail(struct ibuf *);
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int ibuf_fd_get(struct ibuf *);
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void ibuf_fd_set(struct ibuf *, int);
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int ibuf_write(struct msgbuf *);
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void msgbuf_init(struct msgbuf *);
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void msgbuf_clear(struct msgbuf *);
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uint32_t msgbuf_queuelen(struct msgbuf *);
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int msgbuf_write(struct msgbuf *);
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/* imsg.c */
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void imsg_init(struct imsgbuf *, int);
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ssize_t imsg_read(struct imsgbuf *);
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ssize_t imsg_get(struct imsgbuf *, struct imsg *);
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int imsg_get_ibuf(struct imsg *, struct ibuf *);
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int imsg_get_data(struct imsg *, void *, size_t);
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int imsg_get_fd(struct imsg *);
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uint32_t imsg_get_id(struct imsg *);
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size_t imsg_get_len(struct imsg *);
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pid_t imsg_get_pid(struct imsg *);
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uint32_t imsg_get_type(struct imsg *);
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int imsg_forward(struct imsgbuf *, struct imsg *);
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int imsg_compose(struct imsgbuf *, uint32_t, uint32_t, pid_t, int,
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const void *, size_t);
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int imsg_composev(struct imsgbuf *, uint32_t, uint32_t, pid_t, int,
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const struct iovec *, int);
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int imsg_compose_ibuf(struct imsgbuf *, uint32_t, uint32_t, pid_t,
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struct ibuf *);
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struct ibuf *imsg_create(struct imsgbuf *, uint32_t, uint32_t, pid_t, size_t);
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int imsg_add(struct ibuf *, const void *, size_t);
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void imsg_close(struct imsgbuf *, struct ibuf *);
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void imsg_free(struct imsg *);
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int imsg_flush(struct imsgbuf *);
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void imsg_clear(struct imsgbuf *);
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#endif
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