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// SPDX-License-Identifier: ISC
/* $OpenBSD$ */
/*
* Copyright (c) 2006, 2007 Pierre-Yves Ritschard <pyr@openbsd.org>
* Copyright (c) 2006, 2007, 2008 Reyk Floeter <reyk@openbsd.org>
* Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
*/
#ifndef _IMSG_H_
#define _IMSG_H_
#ifdef __cplusplus
extern "C" {
#endif
#define IBUF_READ_SIZE 65535
#define IMSG_HEADER_SIZE sizeof(struct imsg_hdr)
#define MAX_IMSGSIZE 16384
struct ibuf {
TAILQ_ENTRY(ibuf) entry;
uint8_t *buf;
size_t size;
size_t max;
size_t wpos;
size_t rpos;
int fd;
};
struct msgbuf {
TAILQ_HEAD(, ibuf) bufs;
uint32_t queued;
int fd;
};
struct ibuf_read {
uint8_t buf[IBUF_READ_SIZE];
uint8_t *rptr;
size_t wpos;
};
struct imsg_fd {
TAILQ_ENTRY(imsg_fd) entry;
int fd;
};
struct imsgbuf {
TAILQ_HEAD(, imsg_fd) fds;
struct ibuf_read r;
struct msgbuf w;
int fd;
pid_t pid;
};
#define IMSGF_HASFD 1
struct imsg_hdr {
uint32_t type;
uint16_t len;
uint16_t flags;
uint32_t peerid;
uint32_t pid;
};
struct imsg {
struct imsg_hdr hdr;
int fd;
void *data;
};
/* buffer.c */
struct ibuf *ibuf_open(size_t);
struct ibuf *ibuf_dynamic(size_t, size_t);
int ibuf_add(struct ibuf *, const void *, size_t);
void *ibuf_reserve(struct ibuf *, size_t);
void *ibuf_seek(struct ibuf *, size_t, size_t);
size_t ibuf_size(struct ibuf *);
size_t ibuf_left(struct ibuf *);
void ibuf_close(struct msgbuf *, struct ibuf *);
int ibuf_write(struct msgbuf *);
void ibuf_free(struct ibuf *);
void msgbuf_init(struct msgbuf *);
void msgbuf_clear(struct msgbuf *);
int msgbuf_write(struct msgbuf *);
void msgbuf_drain(struct msgbuf *, size_t);
/* imsg.c */
void imsg_init(struct imsgbuf *, int);
ssize_t imsg_read(struct imsgbuf *);
ssize_t imsg_get(struct imsgbuf *, struct imsg *);
int imsg_compose(struct imsgbuf *, uint32_t, uint32_t, pid_t, int, const void *,
uint16_t);
int imsg_composev(struct imsgbuf *, uint32_t, uint32_t, pid_t, int,
const struct iovec *, int);
struct ibuf *imsg_create(struct imsgbuf *, uint32_t, uint32_t, pid_t, uint16_t);
int imsg_add(struct ibuf *, const void *, uint16_t);
void imsg_close(struct imsgbuf *, struct ibuf *);
void imsg_free(struct imsg *);
int imsg_flush(struct imsgbuf *);
void imsg_clear(struct imsgbuf *);
#ifdef __cplusplus
}
#endif
#endif
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