[9fans] pop3

[9fans] pop3

[arisawa]

Hello,

My pop3 is something wrong after I rebooted my server.
<Problem 1>
That runs in infinite loop if I try to get my mail with clear text password.
ar% ps
...
arisawa       13505   95:16   0:00     332K Ready    pop3
...
ar%
ar% acid 13505
/proc/13505/text:386 plan 9 executable

/sys/lib/acid/port
/sys/lib/acid/386
acid: stk()
memchr(n=0x2000,p=0x38358,c=0xa)+0x13 /sys/src/libc/386/memchr.s:13
Brdline(bp=0x38320,delim=0xa)+0x5b /sys/src/libbio/brdline.c:29
readmbox(box=0x2e59c)+0x31d /sys/src/cmd/upas/pop3/pop3.c:245
dologin(response=0x7fffeb61)+0x11b /sys/src/cmd/upas/pop3/pop3.c:767
apopcmd(arg=0x7fffeb59)+0x39 /sys/src/cmd/upas/pop3/pop3.c:801
main(argv=0x7fffefac,argc=0x0)+0x15d /sys/src/cmd/upas/pop3/pop3.c:140
_main+0x31 /sys/src/libc/386/main9.s:16
acid: lstk()
memchr(n=0x2000,p=0x38358,c=0xa)+0x13 /sys/src/libc/386/memchr.s:13
Brdline(bp=0x38320,delim=0xa)+0x5b /sys/src/libbio/brdline.c:29
	ip=0x38358
	i=0x2000
	j=0x134
	ep=0x0
readmbox(box=0x2e59c)+0x31d /sys/src/cmd/upas/pop3/pop3.c:245
	err=0x33c50
	pid=0x34c2
	fd=0x3
	d=0x4bf30
	nd=0xee
	i=0xe1
	m=0x37f2c
	buf=0x2f363232
	n=0x28
	lines=0x7
	b=0x38320
dologin(response=0x7fffeb61)+0x11b /sys/src/cmd/upas/pop3/pop3.c:767
	ai=0x33c60
apopcmd(arg=0x7fffeb59)+0x39 /sys/src/cmd/upas/pop3/pop3.c:801
	resp=0x7fffeb61
main(argv=0x7fffefac,argc=0x0)+0x15d /sys/src/cmd/upas/pop3/pop3.c:140
	_argc=0x0
	_args=0x0
	fd=0x0
	cmdbuf=0x504f5041
	arg=0x7fffeb59
	c=0x2b160
_main+0x31 /sys/src/libc/386/main9.s:16
acid:

Of couse I know my server reject plain text password.

<Problem 2>
I cannot get my mail using MD5 charange/response.
pop3 does not fall into infinite loop.
/sys/log/auth shows I am authenticate.
/sys/log/pop3 says nothing.
I also tried upas/pop3 with -d option.
The debugging information shows the last message is
ar% tail /sys/log/pop3
-> +OK POP3 server ready <42e43b7c405786ef.29766d694ebdd862@hera>
CAPA
-> +OK
-> TOP
-> PIPELINING
-> UIDL
-> STLS
-> .
That comes "capa" request from client.

What should I check?

Thanks in advance.

Kenji Arisawa

Re: [9fans] pop3

[arisawa]

Half of the problem is resolved.
Mac OSX is cleaver enough because the mail reader use challenge/response even if
I instruct it to use clear text password, if pop3 server accepts challenge/response.
The following loop in pop3.c makes a problem.
readmbox(char *box)
{
....
		for(;;){
			p = Brdline(b, '\n');
			if(p == nil){
				if(Blinelen(b) == 0)
					break;
			}else
				lines++;
		}
....
}
The code is unclear if p==nil and Blinelen(b) != 0 happens.
I replaced it by
		for(;;){
			p = Brdline(b, '\n');
			if(p == nil)
				break;
			else
				lines++;
		}
then infinite loop is stopped.
Now I can get mails from my server if I instruct Mac OXS to use clear password.
However if I instruct it to use challenge/response, I cannot get mails.
I don't know the reason yet.


Kenji Arisawa

Re: [9fans] pop3

[arisawa]

I said
><Problem 2>
>I cannot get my mail using MD5 charange/response.
>pop3 does not fall into infinite loop.
>/sys/log/auth shows I am authenticate.
>/sys/log/pop3 says nothing.
however
>/sys/log/auth shows I am authenticate.
is probably my mistake.

The first command from Mac is CAPA and then pop3 server responds
and nothing.

Kenji Arisawa

Re: [9fans] pop3

[YAMANASHI Takeshi]

On Mon May 10 15:58:32 JST 2004, zer0db@fl2600.com wrote:
> I cant seem to connect to a remote mail server (pop3) and display it as a
> local file. Would I use upas/fs <remote_server> <mount_point>.

Options to upas/fs shouldn't be `upas/fs -f /pop/mail_server/user_name' ?
--

[9fans] pop3

[zer0db]

I cant seem to connect to a remote mail server (pop3) and display it as a
local file. Would I use upas/fs <remote_server> <mount_point>. I know im
missing something cause the last time I got it to work I had to
authenticate then everything will show up in faces.

Re: [9fans] pop3

[arisawa]

>This day I received a mail with long long long single line CC field.
>The size is over 100kB!
This was incorrect.
`Long long long' was BCC field.

cpu% pwd
/mail/fs/mbox
cpu% ls -l 1
--r--r--r-- M 59205 arisawa arisawa  65140 Sep  8 19:35 1/bcc
--r--r--r-- M 59205 arisawa arisawa  39368 Sep  8 19:35 1/body
--r--r--r-- M 59205 arisawa arisawa      0 Sep  8 19:35 1/cc
--r--r--r-- M 59205 arisawa arisawa     43 Sep  8 19:35 1/date
--r--r--r-- M 59205 arisawa arisawa     40 Sep  8 19:35 1/digest
--r--r--r-- M 59205 arisawa arisawa      0 Sep  8 19:35 1/disposition
--r--r--r-- M 59205 arisawa arisawa      0 Sep  8 19:35 1/filename
--r--r--r-- M 59205 arisawa arisawa     18 Sep  8 19:35 1/from
--r--r--r-- M 59205 arisawa arisawa  65253 Sep  8 19:35 1/header
--r--r--r-- M 59205 arisawa arisawa  65358 Sep  8 19:35 1/info
--r--r--r-- M 59205 arisawa arisawa      0 Sep  8 19:35 1/inreplyto
--r--r--r-- M 59205 arisawa arisawa      2 Sep  8 19:35 1/lines
--r--r--r-- M 59205 arisawa arisawa      0 Sep  8 19:35 1/messageid
--r--r--r-- M 59205 arisawa arisawa      0 Sep  8 19:35 1/mimeheader
--r--r--r-- M 59205 arisawa arisawa 105009 Sep  8 19:35 1/raw
--r--r--r-- M 59205 arisawa arisawa  39368 Sep  8 19:35 1/rawbody
--r--r--r-- M 59205 arisawa arisawa  65640 Sep  8 19:35 1/rawheader
--r--r--r-- M 59205 arisawa arisawa     23 Sep  8 19:35 1/replyto
--r--r--r-- M 59205 arisawa arisawa      0 Sep  8 19:35 1/sender
--r--r--r-- M 59205 arisawa arisawa      0 Sep  8 19:35 1/subject
--r--r--r-- M 59205 arisawa arisawa     23 Sep  8 19:35 1/to
--r--r--r-- M 59205 arisawa arisawa     10 Sep  8 19:35 1/type
--r--r--r-- M 59205 arisawa arisawa     43 Sep  8 19:35 1/unixdate
--r--r--r-- M 59205 arisawa arisawa     68 Sep  8 19:35 1/unixheader
cpu%

Actual body size is not 39368 but very small.

cpu% cat 1/body
[many many may mail addresses is sniped]
@graphic-designer.com,slavinm@delphi.com,chwa@bbs.openfind.com.tw
Subject: CONFIDENTIAL BUSINESS PROPOSAL!!!
Date: Sun, 8 Sep 2002 02:16:47 +0100
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 8bit
X-Originating-IP: 192.116.116.5
X-Mailer: Eircom Net CRC Webmail (http://www.eircom.net/)
Organization: Eircom Net (http://www.eircom.net/)

[mail body continued # snipped]

Kenji Arisawa

[9fans] pop3

[arisawa]

Hello,

This day I received a mail with long long long single line CC field.
The size is over 100kB!
I tried pop3 but both pop3 server and client failed into endless
loop.

Where should I fix ?
And I hate such a mail. How can I cut that ?

cpu% mail
1       105009   9/08 10:18 dmuka22@eircom.net
...
cpu% ps
arisawa       52759    6:45   0:00     280K Ready    pop3
cpu% acid 52830
/proc/52830/text:386 plan 9 executable

/sys/lib/acid/port
/sys/lib/acid/386
acid: stk()
At pc:0x0002002d:memchr+0x13 /sys/src/libc/386/memchr.s:13
memchr(n=0x00002000,p=0x00030728,c=0x0000000a)
/sys/src/libc/386/memchr.s:4
	called from Brdline+0x5d /sys/src/libbio/brdline.c:29
Brdline(bp=0x000306f0,delim=0x0000000a) /sys/src/libbio/brdline.c:7
	called from readmbox+0x31d /usr/arisawa/src/pop3/pop3.c:243
readmbox(box=0x0002d3b8) /usr/arisawa/src/pop3/pop3.c:164
	called from dologin+0x239 /usr/arisawa/src/pop3/pop3.c:759
dologin(response=0x7fffeb91) /usr/arisawa/src/pop3/pop3.c:719
	called from apopcmd+0x39 /usr/arisawa/src/pop3/pop3.c:796
apopcmd(arg=0x7fffeb89) /usr/arisawa/src/pop3/pop3.c:789
	called from main+0x15d /usr/arisawa/src/pop3/pop3.c:138
main(argv=0x7fffefdc,argc=0x00000000)
/usr/arisawa/src/pop3/pop3.c:91
	called from _main+0x31 /sys/src/libc/386/main9.s:16
acid:
echo kill > /proc/52830/ctl
cpu%

Kenji Arisawa