Make the path length of UNIX domain sockets
specified by a #define. Also, add a comment describing the historical context for this length. Reviewed by: bz, jhb, kbowling (previous version) MFC after: 2 weeks Sponsored by: Netflix, Inc. Differential Revision: https://reviews.freebsd.org/D24272
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@ -43,13 +43,21 @@ typedef __sa_family_t sa_family_t;
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#define _SA_FAMILY_T_DECLARED
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#define _SA_FAMILY_T_DECLARED
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#endif
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#endif
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/*
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* Historically, (struct sockaddr) needed to fit inside an mbuf.
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* For this reason, UNIX domain sockets were therefore limited to
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* 104 bytes. While this limit is no longer necessary, it is kept for
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* binary compatibility reasons.
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*/
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#define SUNPATHLEN 104
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/*
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/*
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* Definitions for UNIX IPC domain.
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* Definitions for UNIX IPC domain.
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*/
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*/
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struct sockaddr_un {
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struct sockaddr_un {
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unsigned char sun_len; /* sockaddr len including null */
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unsigned char sun_len; /* sockaddr len including null */
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sa_family_t sun_family; /* AF_UNIX */
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sa_family_t sun_family; /* AF_UNIX */
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char sun_path[104]; /* path name (gag) */
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char sun_path[SUNPATHLEN]; /* path name (gag) */
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};
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};
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#if __BSD_VISIBLE
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#if __BSD_VISIBLE
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