xref: /original-bsd/usr.sbin/sendmail/cf/m4/proto.m4 (revision b9cffa27) 
1divert(-1)
2#
3# Copyright (c) 1983 Eric P. Allman
4# Copyright (c) 1988 The Regents of the University of California.
5# All rights reserved.
6#
7# %sccs.include.redist.sh%
8#
9divert(0)
10
11VERSIONID(@(#)proto.m4	2.14 (Berkeley) 10/05/91)
12
13MAILER(local)dnl
14
15##################
16#   local info   #
17##################
18
19ifdef(`_USE_CW_FILE_',
20`# file containing internet aliases in our primary domain
21Fw/etc/sendmail.cw', `dnl')
22
23ifdef(`UUCP_RELAY',
24`# UUCP relay host
25CONCAT(DY, UUCP_RELAY)
26')dnl
27ifdef(`BITNET_RELAY',
28`#  BITNET relay host
29CONCAT(DB, BITNET_RELAY)
30')dnl
31ifdef(`CSNET_RELAY',
32`# CSNET relay host
33CONCAT(DC, CSNET_RELAY)
34')dnl
35# my official hostname ($w or $w.$D)
36CONCAT(Dj$w, ifdef(`NEED_DOMAIN', .$D))
37
38# who I masquerade as (can be $j)
39CONCAT(DM, ifdef(`MASQUERADE_NAME', MASQUERADE_NAME, $j))
40
41# who I send unqualified names to (null means deliver locally)
42CONCAT(DR, ifdef(`LOCAL_RELAY', LOCAL_RELAY))
43
44# names that should be delivered locally, even if we have a relay
45CLroot
46undivert(5)dnl
47
48ifdef(`UUCP_NAME',
49`# uucp hostnames
50UUCP_NAME
51UUCP_ALIASES
52
53# local UUCP connections
54include(UUCP_HOSTS_FILE)',
55`dnl')
56
57# operators that cannot be in local usernames (i.e., network indicators)
58CO @ % !
59
60# a class with just dot (for identifying canonical names)
61C..
62
63ifdef(`USERDB_FILE',
64`# location of user database file (null means no lookup)
65CONCAT(`OU', USERDB_FILE)',
66`dnl')
67
68ifdef(`_NO_WILDCARD_MX_',
69`# we can guarantee no wildcard MX records matching our domain
70Ow',
71`dnl')
72
73ifdef(`NEWSENDMAIL',
74`# level 2 config file format
75O=2', `dnl')
76
77include(`../m4/version.m4')
78
79ifdef(`INTERNET_RELAY',
80`include(../sitedep/nicregistered.m4)',
81`dnl')
82include(`../m4/boilerplate.m4')
83#
84######################################################################
85######################################################################
86#####
87#####			REWRITING RULES
88#####
89######################################################################
90######################################################################
91
92
93###########################################
94###  Rulset 3 -- Name Canonicalization  ###
95###########################################
96S3
97
98# handle "from:<>" special case
99R$*<>$*			$@@				turn into magic token
100
101# basic textual canonicalization -- note RFC733 heuristic here
102R$*<$*<$*<$+>$*>$*>$*	$4				3-level <> nesting
103R$*<$*<$+>$*>$*		$3				2-level <> nesting
104R$*<$+>$*		$2				basic RFC821/822 parsing
105
106# make sure <@a,@b,@c:user@d> syntax is easy to parse -- undone later
107R@$+,$+			@$1:$2				change all "," to ":"
108
109# localize and dispose of route-based addresses
110R@$+:$+			$@$>6<@$1>:$2			handle <route-addr>
111
112# find focus for list syntax
113R$+:$*;@$+		$@$>6$1:$2;<@$3>		list syntax
114R$+:$*;			$@$1:$2;			list syntax
115
116# find focus for @ syntax addresses
117R$+@$+			$:$1<@$2>			focus on domain
118R$+<$+@$+>		$1$2<@$3>			move gaze right
119R$+<@$+>		$@$>6$1<@$2>			already canonical
120
121# convert old-style addresses to a domain-based address
122R$-!$+			$@$>6$2<@$1.UUCP>		resolve uucp names
123R$+.$-!$+		$@$>6$3<@$1.$2>			domain uucps
124R$+!$+			$@$>6$2<@$1.UUCP>		uucp subdomains
125
126# if we have % signs, take the rightmost one
127R$*%$*			$1@$2				First make them all @s.
128R$*@$*@$*		$1%$2@$3			Undo all but the last.
129R$*@$*			$@$>6$1<@$2>			Insert < > and finish
130
131# else we must be a local name
132
133
134###############################################
135###  Ruleset 6 -- bottom half of ruleset 3  ###
136###############################################
137
138#  At this point, everything should be in a local_part@domain format.
139
140S6
141undivert(2)dnl
142
143# handle special cases for local names
144R$* < @ $=w > $*		$: $1 < @ $j . > $3		no domain at all
145R$* < @ $=w .UUCP> $*		$: $1 < @ $j . > $3		.UUCP domain
146
147ifdef(`UUCP_RELAY',
148`# pass UUCP addresses straight through
149R$* < @ $+ . UUCP > $*		$@ $1 < @ $2 .UUCP > $3',
150`# if really UUCP, handle it immediately
151ifdef(`_CLASS_U_',
152`R$* < @ $=U . UUCP > $*		$@ $1 < @ $2 .UUCP > $3', `dnl')
153ifdef(`_CLASS_V_',
154`R$* < @ $=V . UUCP > $*		$@ $1 < @ $2 .UUCP > $3', `dnl')
155ifdef(`_CLASS_W_',
156`R$* < @ $=W . UUCP > $*		$@ $1 < @ $2 .UUCP > $3', `dnl')
157ifdef(`_CLASS_X_',
158`R$* < @ $=X . UUCP > $*		$@ $1 < @ $2 .UUCP > $3', `dnl')
159ifdef(`_CLASS_Y_',
160`R$* < @ $=Y . UUCP > $*		$@ $1 < @ $2 .UUCP > $3', `dnl')
161
162# try UUCP traffic as a local address
163R$* < @ $+ .UUCP > $*			$: $1 < @ $[ $2 $] .UUCP > $3
164ifdef(`NEWSENDMAIL',
165`R$* < @ $+ . .UUCP > $*		$@ $1 < @ $2 . > $3',
166`R$* < @ $+ . $+ .UUCP > $*		$@ $1 < @ $2 . $3 > $4')')
167
168# pass to name server to make hostname canonical
169R$* < @ $* $~. > $*		$: $1 < @ $[ $2 $3 $] > $4
170
171# if this is the local hostname, make sure we treat is as canonical
172R$* < @ $j > $*			$: $1 < @ $j . > $2
173
174
175##################################################
176###  Ruleset 4 -- Final Output Post-rewriting  ###
177##################################################
178S4
179
180R@			$@				handle <> error addr
181
182# resolve numeric addresses to name if possible
183R$* < @ [ $+ ] > $*	$: $1 < @ $[ [$2] $] > $3	lookup numeric internet addr
184
185# strip trailing dot off possibly canonical name
186R$* < @ $+ . > $*	$1 < @ $2 > $3
187
188# externalize local domain info
189R$* < $+ > $*		$1 $2 $3			defocus
190R@ $+ : @ $+ : $+	@ $1 , @ $2 : $3		<route-addr> canonical
191
192# UUCP must always be presented in old form
193R$+ @ $- . UUCP		$2!$1				u@h.UUCP => h!u
194
195# delete duplicate local names
196R$+ % $=w @ $=w		$1 @ $j				u%host@host => u@host
197
198
199
200#############################################################
201###   Ruleset 7 -- recanonicalize and call ruleset zero   ###
202###		   (used for recursive calls)		  ###
203#############################################################
204
205S7
206R$*			$: $>3 $1
207R$*			$@ $>0 $1
208
209
210######################################
211###   Ruleset 0 -- Parse Address   ###
212######################################
213
214S0
215
216# handle numeric address spec
217R$* < @ [ $+ ] > $*	$: $1 < @ $[ [$2] $] > $3	numeric internet addr
218R$* < @ [ $+ ] > $*	$#smtp $@ [$2] $: $1 @ [$2] $3	numeric internet spec
219
220#R@			$#error$:Invalid address	handle <> form
221
222ifdef(`LOCAL_RELAY',
223`# now delete the local info -- note $=O to find characters that cause forwarding
224R< @ $j . > : $*	$@ $>7 $1			@here:... -> ...
225R$* $=O $* < @ $j . >	$@ $>7 $1 $2 $3			...@here -> ...
226
227# short circuit local delivery so forwarded email works
228ifdef(`NEWSENDMAIL',
229`R$+ < @ $j . >		$#local $: : $1			local address',
230`R$+ < @ $j . >		$#local $: $1			local address')',
231`# delete local info
232R$* < @ $j . > $*	$@ $>7 $1 $2')
233
234undivert(3)dnl
235
236undivert(4)dnl
237
238# resolve remotely connected UUCP links
239ifdef(`_CLASS_V_',
240`R$* < @ $=V . UUCP > $*		$#smtp $@ $V $: $1<@$2.UUCP>$3', `dnl')
241ifdef(`_CLASS_W_',
242`R$* < @ $=W . UUCP > $*		$#smtp $@ $W $: $1<@$2.UUCP>$3', `dnl')
243ifdef(`_CLASS_X_',
244`R$* < @ $=X . UUCP > $*		$#smtp $@ $X $: $1<@$2.UUCP>$3', `dnl')
245
246# resolve fake top level domains by forwarding to other hosts
247ifdef(`BITNET_RELAY',
248`R$*<@$+.BITNET>$*	$#smtp$@$B$:$1<@$2.BITNET>$3		user@host.BITNET',
249	`dnl')
250ifdef(`CSNET_RELAY',
251`R$*<@$+.CSNET>$*	$#smtp$@$C$:$1<@$2.CSNET>$3		user@host.CSNET',
252	`dnl')
253
254ifdef(`UUCP_RELAY',
255`# forward non-local UUCP traffic to our UUCP relay
256R$*<@$*.UUCP>$*		$#smtp$@$Y$:$1<@$2.UUCP>		uucp mail',
257`ifdef(`_UUCP_LINKED_',
258`# forward other UUCP traffic straight to UUCP
259R< @ $+ .UUCP > : $+	$#uucp $@ $1 $: $1:$2			@host.UUCP:...
260R$+ < @ $+ .UUCP >	$#uucp $@ $2 $: $1			user@host.UUCP',
261	`dnl')')
262
263# deal with other remote names
264R$* < @ $* > $*		$# smtp $@ $2 $: $1 < @ $2 > $3		user@host.domain
265
266ifdef(`NEWSENDMAIL',
267`# handle locally delivered names
268ifdef(`LOCAL_RELAY',
269`R$=L			$# local $: : $1		special local names',
270	`dnl')
271R$+			$# local $: $1			regular local names
272', `ifdef(`LOCAL_RELAY',
273`# forward remaining names to local relay
274R$+			$# smtp $@ $R $: $1 @ $R',
275`# remaining names must be local
276R$+			$# local $: $1')')
277
278ifdef(`LOCAL_RELAY', `ifdef(`NEWSENDMAIL',
279`#
280# special rewriting after aliases have been expanded
281#
282
283S5
284
285R$+			$# smtp $@ $R $: $1 < @ $R >	send to relay')')
286#
287######################################################################
288######################################################################
289#####
290#####			MAILER DEFINITIONS
291#####
292######################################################################
293######################################################################
294
295undivert(7)dnl
296