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-rw-r--r--compat/imsg.h113
1 files changed, 113 insertions, 0 deletions
diff --git a/compat/imsg.h b/compat/imsg.h
new file mode 100644
index 0000000..5b092cf
--- /dev/null
+++ b/compat/imsg.h
@@ -0,0 +1,113 @@
+/* $OpenBSD: imsg.h,v 1.5 2019/01/20 02:50:03 bcook Exp $ */
+
+/*
+ * 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>
+ *
+ * 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 <stdint.h>
+
+#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 {
+ 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 *);
+
+#endif