1 files changed, 108 insertions, 0 deletions
diff --git a/lib/imsg.h b/lib/imsg.h
new file mode 100644
index 0000000..4651eee
--- /dev/null
+++ b/lib/imsg.h
@@ -0,0 +1,108 @@
+// 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