6 #include "auto_qmail.h"
22 #include "rcpthosts.h"
23 #include "timeoutread.h"
24 #include "timeoutwrite.h"
28 unsigned int databytes
= 0;
31 int safewrite(fd
,buf
,len
) int fd
; char *buf
; int len
;
34 r
= timeoutwrite(timeout
,fd
,buf
,len
);
40 substdio ssout
= SUBSTDIO_FDBUF(safewrite
,1,ssoutbuf
,sizeof ssoutbuf
);
42 void flush() { substdio_flush(&ssout
); }
43 void out(s
) char *s
; { substdio_puts(&ssout
,s
); }
45 void die_read() { _exit(1); }
46 void die_alarm() { out("451 timeout (#4.4.2)\r\n"); flush(); _exit(1); }
47 void die_nomem() { out("421 out of memory (#4.3.0)\r\n"); flush(); _exit(1); }
48 void die_control() { out("421 unable to read controls (#4.3.0)\r\n"); flush(); _exit(1); }
49 void die_ipme() { out("421 unable to figure out my IP addresses (#4.3.0)\r\n"); flush(); _exit(1); }
50 void straynewline() { out("451 See http://pobox.com/~djb/docs/smtplf.html.\r\n"); flush(); _exit(1); }
52 void err_bmf() { out("553 sorry, your envelope sender is in my badmailfrom list (#5.7.1)\r\n"); }
53 void err_nogateway() { out("553 sorry, that domain isn't in my list of allowed rcpthosts (#5.7.1)\r\n"); }
54 void err_unimpl() { out("502 unimplemented (#5.5.1)\r\n"); }
55 void err_syntax() { out("555 syntax error (#5.5.4)\r\n"); }
56 void err_wantmail() { out("503 MAIL first (#5.5.1)\r\n"); }
57 void err_wantrcpt() { out("503 RCPT first (#5.5.1)\r\n"); }
58 void err_noop() { out("250 ok\r\n"); }
59 void err_vrfy() { out("252 send some mail, i'll try my best\r\n"); }
60 void err_qqt() { out("451 qqt failure (#4.3.0)\r\n"); }
63 stralloc greeting
= {0};
65 void smtp_greet(code
) char *code
;
67 substdio_puts(&ssout
,code
);
68 substdio_put(&ssout
,greeting
.s
,greeting
.len
);
72 out("214 qmail home page: http://pobox.com/~djb/qmail.html\r\n");
76 smtp_greet("221 "); out("\r\n"); flush(); _exit(0);
85 stralloc helohost
= {0};
86 char *fakehelo
; /* pointer into helohost, or 0 */
88 void dohelo(arg
) char *arg
; {
89 if (!stralloc_copys(&helohost
,arg
)) die_nomem();
90 if (!stralloc_0(&helohost
)) die_nomem();
91 fakehelo
= case_diffs(remotehost
,helohost
.s
) ? helohost
.s
: 0;
95 stralloc liphost
= {0};
98 struct constmap mapbmf
;
105 if (control_init() == -1) die_control();
106 if (control_rldef(&greeting
,"control/smtpgreeting",1,(char *) 0) != 1)
108 liphostok
= control_rldef(&liphost
,"control/localiphost",1,(char *) 0);
109 if (liphostok
== -1) die_control();
110 if (control_readint(&timeout
,"control/timeoutsmtpd") == -1) die_control();
111 if (timeout
<= 0) timeout
= 1;
113 if (rcpthosts_init() == -1) die_control();
115 bmfok
= control_readfile(&bmf
,"control/badmailfrom",0);
116 if (bmfok
== -1) die_control();
118 if (!constmap_init(&mapbmf
,bmf
.s
,bmf
.len
,0)) die_nomem();
120 if (control_readint(&databytes
,"control/databytes") == -1) die_control();
121 x
= env_get("DATABYTES");
122 if (x
) { scan_ulong(x
,&u
); databytes
= u
; }
123 if (!(databytes
+ 1)) --databytes
;
125 remoteip
= env_get("TCPREMOTEIP");
126 if (!remoteip
) remoteip
= "unknown";
127 local
= env_get("TCPLOCALHOST");
128 if (!local
) local
= env_get("TCPLOCALIP");
129 if (!local
) local
= "unknown";
130 remotehost
= env_get("TCPREMOTEHOST");
131 if (!remotehost
) remotehost
= "unknown";
132 remoteinfo
= env_get("TCPREMOTEINFO");
133 relayclient
= env_get("RELAYCLIENT");
138 stralloc addr
= {0}; /* will be 0-terminated, if addrparse returns 1 */
146 struct ip_address ip
;
151 i
= str_chr(arg
,'<');
154 else { /* partner should go read rfc 821 */
156 arg
+= str_chr(arg
,':');
157 if (*arg
== ':') ++arg
;
158 while (*arg
== ' ') ++arg
;
161 /* strip source route */
162 if (*arg
== '@') while (*arg
) if (*arg
++ == ':') break;
164 if (!stralloc_copys(&addr
,"")) die_nomem();
167 for (i
= 0;ch
= arg
[i
];++i
) { /* copy arg to addr, stripping quotes */
169 if (!stralloc_append(&addr
,&ch
)) die_nomem();
173 if (!flagquoted
&& (ch
== terminator
)) break;
175 case '\\': flagesc
= 1; break;
176 case '"': flagquoted
= !flagquoted
; break;
177 default: if (!stralloc_append(&addr
,&ch
)) die_nomem();
181 /* could check for termination failure here, but why bother? */
182 if (!stralloc_append(&addr
,"")) die_nomem();
185 i
= byte_rchr(addr
.s
,addr
.len
,'@');
186 if (i
< addr
.len
) /* if not, partner should go read rfc 821 */
187 if (addr
.s
[i
+ 1] == '[')
188 if (!addr
.s
[i
+ 1 + ip_scanbracket(addr
.s
+ i
+ 1,&ip
)])
191 if (!stralloc_cat(&addr
,&liphost
)) die_nomem();
192 if (!stralloc_0(&addr
)) die_nomem();
196 if (addr
.len
> 900) return 0;
203 if (!bmfok
) return 0;
204 if (constmap(&mapbmf
,addr
.s
,addr
.len
- 1)) return 1;
205 j
= byte_rchr(addr
.s
,addr
.len
,'@');
207 if (constmap(&mapbmf
,addr
.s
+ j
,addr
.len
- j
- 1)) return 1;
214 r
= rcpthosts(addr
.s
,str_len(addr
.s
));
215 if (r
== -1) die_control();
221 int flagbarf
; /* defined if seenmail */
222 stralloc mailfrom
= {0};
223 stralloc rcptto
= {0};
225 void smtp_helo(arg
) char *arg
;
227 smtp_greet("250 "); out("\r\n");
228 seenmail
= 0; dohelo(arg
);
230 void smtp_ehlo(arg
) char *arg
;
232 smtp_greet("250-"); out("\r\n250-PIPELINING\r\n250 8BITMIME\r\n");
233 seenmail
= 0; dohelo(arg
);
238 out("250 flushed\r\n");
240 void smtp_mail(arg
) char *arg
;
242 if (!addrparse(arg
)) { err_syntax(); return; }
243 flagbarf
= bmfcheck();
245 if (!stralloc_copys(&rcptto
,"")) die_nomem();
246 if (!stralloc_copys(&mailfrom
,addr
.s
)) die_nomem();
247 if (!stralloc_0(&mailfrom
)) die_nomem();
250 void smtp_rcpt(arg
) char *arg
; {
251 if (!seenmail
) { err_wantmail(); return; }
252 if (!addrparse(arg
)) { err_syntax(); return; }
253 if (flagbarf
) { err_bmf(); return; }
256 if (!stralloc_cats(&addr
,relayclient
)) die_nomem();
257 if (!stralloc_0(&addr
)) die_nomem();
260 if (!addrallowed()) { err_nogateway(); return; }
261 if (!stralloc_cats(&rcptto
,"T")) die_nomem();
262 if (!stralloc_cats(&rcptto
,addr
.s
)) die_nomem();
263 if (!stralloc_0(&rcptto
)) die_nomem();
268 int saferead(fd
,buf
,len
) int fd
; char *buf
; int len
;
272 r
= timeoutread(timeout
,fd
,buf
,len
);
273 if (r
== -1) if (errno
== error_timeout
) die_alarm();
274 if (r
<= 0) die_read();
279 substdio ssin
= SUBSTDIO_FDBUF(saferead
,0,ssinbuf
,sizeof ssinbuf
);
282 unsigned int bytestooverflow
= 0;
288 if (!--bytestooverflow
)
290 qmail_put(&qqt
,ch
,1);
299 int pos
; /* number of bytes since most recent \n, if fih */
300 int flagmaybex
; /* 1 if this line might match RECEIVED, if fih */
301 int flagmaybey
; /* 1 if this line might match \r\n, if fih */
302 int flagmaybez
; /* 1 if this line might match DELIVERED, if fih */
307 pos
= 0; flagmaybex
= flagmaybey
= flagmaybez
= 1;
309 substdio_get(&ssin
,&ch
,1);
312 if (ch
!= "delivered"[pos
]) if (ch
!= "DELIVERED"[pos
]) flagmaybez
= 0;
313 if (flagmaybez
) if (pos
== 8) ++*hops
;
315 if (ch
!= "received"[pos
]) if (ch
!= "RECEIVED"[pos
]) flagmaybex
= 0;
316 if (flagmaybex
) if (pos
== 7) ++*hops
;
317 if (pos
< 2) if (ch
!= "\r\n"[pos
]) flagmaybey
= 0;
318 if (flagmaybey
) if (pos
== 1) flaginheader
= 0;
321 if (ch
== '\n') { pos
= 0; flagmaybex
= flagmaybey
= flagmaybez
= 1; }
325 if (ch
== '\n') straynewline();
326 if (ch
== '\r') { state
= 4; continue; }
329 if (ch
== '\n') straynewline();
330 if (ch
== '.') { state
= 2; continue; }
331 if (ch
== '\r') { state
= 4; continue; }
334 case 2: /* \r\n + . */
335 if (ch
== '\n') straynewline();
336 if (ch
== '\r') { state
= 3; continue; }
339 case 3: /* \r\n + .\r */
340 if (ch
== '\n') return;
343 if (ch
== '\r') { state
= 4; continue; }
347 if (ch
== '\n') { state
= 1; break; }
348 if (ch
!= '\r') { put("\r"); state
= 0; }
354 char accept_buf
[FMT_ULONG
];
355 void acceptmessage(qp
) unsigned long qp
;
360 accept_buf
[fmt_ulong(accept_buf
,(unsigned long) when
)] = 0;
363 accept_buf
[fmt_ulong(accept_buf
,qp
)] = 0;
373 if (!seenmail
) { err_wantmail(); return; }
374 if (!rcptto
.len
) { err_wantrcpt(); return; }
376 if (databytes
) bytestooverflow
= databytes
+ 1;
377 if (qmail_open(&qqt
) == -1) { err_qqt(); return; }
379 out("354 go ahead\r\n");
381 received(&qqt
,"SMTP",local
,remoteip
,remotehost
,remoteinfo
,fakehelo
);
383 hops
= (hops
>= MAXHOPS
);
384 if (hops
) qmail_fail(&qqt
);
385 qmail_from(&qqt
,mailfrom
.s
);
386 qmail_put(&qqt
,rcptto
.s
,rcptto
.len
);
388 qqx
= qmail_close(&qqt
);
389 if (!*qqx
) { acceptmessage(qp
); return; }
390 if (hops
) { out("554 too many hops, this message is looping (#5.4.6)\r\n"); return; }
391 if (databytes
) if (!bytestooverflow
) { out("552 sorry, that message size exceeds my databytes limit (#5.3.4)\r\n"); return; }
392 if (*qqx
== 'D') out("554 "); else out("451 ");
397 struct commands smtpcommands
[] = {
398 { "rcpt", smtp_rcpt
, 0 }
399 , { "mail", smtp_mail
, 0 }
400 , { "data", smtp_data
, flush
}
401 , { "quit", smtp_quit
, flush
}
402 , { "helo", smtp_helo
, flush
}
403 , { "ehlo", smtp_ehlo
, flush
}
404 , { "rset", smtp_rset
, 0 }
405 , { "help", smtp_help
, flush
}
406 , { "noop", err_noop
, flush
}
407 , { "vrfy", err_vrfy
, flush
}
408 , { 0, err_unimpl
, flush
}
414 if (chdir(auto_qmail
) == -1) die_control();
416 if (ipme_init() != 1) die_ipme();
419 if (commands(&ssin
,&smtpcommands
) == 0) die_read();