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+# 1995-9P1.9p - Definitions of 9P1 (Plan 9 2nd ed and 3rd ed) messages
+#
+# Copyright (C) 2024  Luke T. Shumaker <lukeshu@lukeshu.com>
+# SPDX-Licence-Identifier: AGPL-3.0-or-later
+
+# https://man.cat-v.org/plan_9_2nd_ed/5/
+# https://man.cat-v.org/plan_9_3rd_ed/5/
+version "9P1"
+
+# tag - identify a request/response pair
+num tag = 2
+
+# file identifier - like a UNIX file-descriptor
+num fid = 2
+
+# uni"Q"ue "ID"entification
+struct qid = "path[4] version[4]"
+
+# a nul-padded string
+struct name = 28*(txt[1])
+
+msg Tnop      = "typ[1,val=TODO] tag[tag,val=0xFFFF]"
+msg Rnop      = "typ[1,val=TODO] tag[tag,val=0xFFFF]"
+msg Tsession  = "typ[1,val=TODO] tag[tag,val=0xFFFF] chal[8]"
+msg Rsession  = "typ[1,val=TODO] tag[tag,val=0xFFFF] chal[8] authid[28] authdom[48]"
+msg Rerror    = "typ[1,val=TODO] tag[tag] ename[64]"
+msg Tflush    = "typ[1,val=TODO] tag[tag] oldtag[tag]"
+msg Rflush    = "typ[1,val=TODO] tag[tag]"
+msg Tattach   = "typ[1,val=TODO] tag[tag] fid[fid] uid[28] aname[28] ticket[72] auth[13]"
+msg Rattach   = "typ[1,val=TODO] tag[tag] fid[fid] qid[8] rauth[13]"
+msg Tclone    = "typ[1,val=TODO] tag[tag] fid[fid] newfid[fid]"
+msg Rclone    = "typ[1,val=TODO] tag[tag] fid[fid]"
+msg Tclwalk   = "typ[1,val=TODO] tag[tag] fid[fid] newfid[fid] name[28]"
+msg Rclwalk   = "typ[1,val=TODO] tag[tag] fid[fid] qid[8]"
+msg Twalk     = "typ[1,val=TODO] tag[tag] fid[fid] name[28]"
+msg Rwalk     = "typ[1,val=TODO] tag[tag] fid[fid] qid[8]"
+msg Topen     = "typ[1,val=TODO] tag[tag] fid[fid] mode[1]"
+msg Ropen     = "typ[1,val=TODO] tag[tag] fid[fid] qid[8]"
+msg Tcreate   = "typ[1,val=TODO] tag[tag] fid[fid] name[28] perm[4] mode[1]"
+msg Rcreate   = "typ[1,val=TODO] tag[tag] fid[fid] qid[8]"
+msg Tread     = "typ[1,val=TODO] tag[tag] fid[fid] offset[8] count[2,max=8192]"
+msg Rread     = "typ[1,val=TODO] tag[tag] fid[fid] count[2,max=8192] pad[1] count*(data[1])"
+msg Twrite    = "typ[1,val=TODO] tag[tag] fid[fid] offset[8] count[2,max=8192] pad[1] count*(data[1])"
+msg Rwrite    = "typ[1,val=TODO] tag[tag] fid[fid] count[2,max=8192]"
+msg Tclunk    = "typ[1,val=TODO] tag[tag] fid[fid]"
+msg Rclunk    = "typ[1,val=TODO] tag[tag] fid[fid]"
+msg Tremove   = "typ[1,val=TODO] tag[tag] fid[fid]"
+msg Rremove   = "typ[1,val=TODO] tag[tag] fid[fid]"
+msg Tstat     = "typ[1,val=TODO] tag[tag] fid[fid]"
+msg Rstat     = "typ[1,val=TODO] tag[tag] fid[fid] stat[116]"
+msg Twstat    = "typ[1,val=TODO] tag[tag] fid[fid] stat[116]"
+msg Rwstat    = "typ[1,val=TODO] tag[tag] fid[fid]"