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/* Callout functions -*- mfl -*-
Copyright (C) 2010, 2011 Sergey Poznyakoff
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
module 'callout'.
require status
#pragma regex push +extended
dclex e_callout_proto
m4_dnl The following two variables are defined in callout.bi
m4_dnl Perhaps someday they will be defined here.
m4_dnl precious string ehlo_domain
m4_dnl precious string mailfrom_address
string last_poll_host
string last_poll_greeting
string last_poll_helo
string last_poll_sent
string last_poll_recv
number cache_used
static func setvar(number fd, string name, string value)
do
write(fd, "SET %name=%value\r\n")
set reply getline(fd)
if not reply matches 'OK.*'
throw e_callout_proto reply
fi
done
func callout_open(string url)
returns number
do
number fd open("@ %url")
fd_set_delimiter(fd,"\r\n")
string reply getline(fd)
if not reply matches 'OK.*'
throw e_callout_proto reply
fi
string sid ""
if milter_client_address == ""
set sid "local:"
else
set sid "%milter_client_address:"
fi
if macro_defined("i")
set sid sid . getmacro("i")
fi
write(fd, "SID %sid\r\n")
set reply getline(fd)
if not reply matches 'OK.*'
throw e_callout_proto reply
fi
m4_ifelse(`
# Set command is not yet supported by the server.
if ehlo_domain
setvar(fd, "EHLO", ehlo_domain)
fi
if mailfrom_address
setvar(fd, "MAILFROM", mailfrom_address)
fi')
return fd
done
func callout_close(number fd)
do
write(fd, "QUIT\r\n")
set reply getline(fd)
close(fd)
done
func callout_do(number fd, string email; string rest)
returns number
do
string reply ""
write(fd, 'VRFY "'.escape(email).'"')
if defined(rest)
write(fd, ' '.rest)
fi
write(fd, "\r\n")
set reply getline(fd)
if not reply matches 'OK.*'
throw e_callout_proto reply
fi
write(fd, "RUN\r\n")
set cache_used 1
loop for set reply getline(fd),
while index(reply, "*") == 0,
set reply getline(fd)
do
if reply matches '\* ([0-9]+) ([A-Z]+) (.*)'
set cache_used 0
switch \2
do
case "INIT":
set last_poll_host \3
case "GRTNG":
set last_poll_greeting \3
case "HELO":
set last_poll_helo \3
case "SENT":
set last_poll_sent \3
case "RECV":
set last_poll_recv \3
done
fi
done
if reply matches "OK ([0-9]+)=(.*)"
switch \2
do
case "success":
pass
case "not_found":
return e_not_found
case "failure":
return e_failure
case "temp_failure" or "timeout":
return e_temp_failure
done
else
return e_not_found
fi
return 0
done
#pragma provide-callout
precious string callout_server_url
precious number __callout_fd -1
begin
do
if callout_server_url == ""
set callout_server_url default_callout_server_url()
fi
done
func __callout_open_default()
returns number
do
if __callout_fd == -1
set __callout_fd callout_open(callout_server_url)
fi
return __callout_fd
done
func callout(string email)
returns number
do
return callout_do(__callout_open_default(), email)
done
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