Module Name: src
Committed By: jschauma
Date: Wed Nov 8 19:27:13 UTC 2023
Modified Files:
src/sys/sys: un.h
Log Message:
Use a #define for sockaddr_un.sun_path and add the historical context around
why it is set to 104. (struct sockaddr needed to fit into an mbuf)
>From FreeBSD; no objections on current-users@.
To generate a diff of this commit:
cvs rdiff -u -r1.60 -r1.61 src/sys/sys/un.h
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/sys/un.h
diff -u src/sys/sys/un.h:1.60 src/sys/sys/un.h:1.61
--- src/sys/sys/un.h:1.60 Sun Aug 8 20:54:49 2021
+++ src/sys/sys/un.h Wed Nov 8 19:27:13 2023
@@ -1,4 +1,4 @@
-/* $NetBSD: un.h,v 1.60 2021/08/08 20:54:49 nia Exp $ */
+/* $NetBSD: un.h,v 1.61 2023/11/08 19:27:13 jschauma Exp $ */
/*
* Copyright (c) 1982, 1986, 1993
@@ -44,12 +44,20 @@ typedef __sa_family_t sa_family_t;
#endif
/*
+ * Historically, (struct sockaddr) needed to fit inside an mbuf.
+ * For this reason, UNIX domain sockets were therefore limited to
+ * 104 bytes. While this limit is no longer necessary, it is kept for
+ * binary compatibility reasons.
+ */
+#define SUNPATHLEN 104
+
+/*
* Definitions for UNIX IPC domain.
*/
struct sockaddr_un {
- uint8_t sun_len; /* total sockaddr length */
- sa_family_t sun_family; /* AF_LOCAL */
- char sun_path[104]; /* path name (gag) */
+ uint8_t sun_len; /* total sockaddr length */
+ sa_family_t sun_family; /* AF_LOCAL */
+ char sun_path[SUNPATHLEN]; /* path name (gag) */
};
/*
