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