ossp-pkg/petidomo/hermes.c
/*
$Source: /v/ossp/cvs/ossp-pkg/petidomo/hermes.c,v $
$Revision: 1.23 $
Copyright (C) 2000 by CyberSolutions GmbH, Germany.
This file is part of Petidomo.
Petidomo 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 2, or (at your option)
any later version.
Petidomo 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.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <string.h>
#include "libtext/text.h"
#include "petidomo.h"
void hermes_main(char * incoming_mail, const char * listname)
{
const struct PD_Config * MasterConfig;
const struct List_Config * ListConfig;
struct stat sb;
struct Mail * MailStruct;
FILE * fh;
char * PostingHeaders;
char * currLine;
char * nextLine;
char * dst;
char * parameter;
char * buffer;
char envelope[1024];
char owner[1024];
int rc, len, operation;
assert(listname != NULL);
/* Initialize internals. */
MasterConfig = getMasterConfig();
ListConfig = getListConfig(listname);
/* Parse the incoming mail. */
rc = ParseMail(&MailStruct, incoming_mail, ListConfig->fqdn);
if (rc != 0)
{
syslog(LOG_ERR, "Parsing the incoming mail failed.");
exit(rc);
}
/* Do sanity checks. */
if (MailStruct->Envelope == NULL)
{
syslog(LOG_ERR, "Received mail without a valid envelope.");
return;
}
if (MailStruct->From == NULL)
{
syslog(LOG_ERR, "Received mail without From: line.");
return;
}
if (*MailStruct->Body == '\0')
{
syslog(LOG_INFO, "Received mail with empty body.");
return;
}
/* Initialize internal stuff. */
if (isValidListName(listname) == FALSE)
{
syslog(LOG_ERR, "Mailing list \"%s\" does not exist.", listname);
exit(1);
}
PostingHeaders = xmalloc(strlen(MailStruct->Header)+1024);
sprintf(envelope, "%s-owner@%s", listname, ListConfig->fqdn);
sprintf(owner, "%s-owner@%s", listname, ListConfig->fqdn);
/* Check for authorization. */
if (FindBodyPassword(MailStruct) != 0)
exit(1);
if (isValidPostingPassword(MailStruct->Approve, listname) == FALSE)
{
/* If no valid posting password has been provided, the mail is
subject to the ACL mechanism. Please note that the ACL may
actually set a correct posting password via the 'approve'
command. So just because there wasn't a valid posting
password here, it doesn't mean there might not be after ACL
processing is over. That's why we check the posting
password again below. */
if (checkACL(MailStruct, listname, &operation, ¶meter, ACL_PRE) != 0)
{
syslog(LOG_ERR, "checkACL() failed with an error.");
exit(1);
}
rc = handleACL(MailStruct, listname, operation, parameter);
switch(rc)
{
case -1:
syslog(LOG_ERR, "handleACL() failed with an error.");
exit(1);
case 0:
break;
case 1:
return;
}
}
if (isValidPostingPassword(MailStruct->Approve, listname) == FALSE)
{
/* Reject the article, if the list is of type 'moderated'. */
if (ListConfig->listtype == LIST_MODERATED)
{
syslog(LOG_INFO, "\"%s\" tried to post to list \"%s\", but failed to " \
"provide a correct password.", MailStruct->From, listname);
fh = vOpenMailer(envelope, owner, NULL);
if (fh != NULL)
{
fprintf(fh, "From: %s (Petidomo Mailing List Server)\n", owner);
fprintf(fh, "To: %s\n", owner);
fprintf(fh, "Subject: Petidomo: BOUNCE %s@%s: Moderator approval required\n", listname, ListConfig->fqdn);
fprintf(fh, "Precedence: junk\n");
fprintf(fh, "Sender: %s\n", owner);
fprintf(fh, "\n");
fprintf(fh, "The following posting requires your explicit approval:\n\n");
fprintf(fh, "%s\n", MailStruct->Header);
fprintf(fh, "%s", MailStruct->Body);
CloseMailer(fh);
}
else
{
syslog(LOG_ERR, "Failed to send email to \"%s\" concerning this request.", owner);
exit(-1);
}
return;
}
else if (ListConfig->listtype == LIST_CLOSED)
{
/* Only subscribers may post */
if (isSubscribed(listname, MailStruct->From, NULL, NULL, TRUE) == FALSE)
{
syslog(LOG_INFO, "\"%s\" tried to post to closed list \"%s\", but " \
"he is no subscriber.", MailStruct->From, listname);
fh = vOpenMailer(envelope, owner, NULL);
if (fh != NULL)
{
fprintf(fh, "From: %s (Petidomo Mailing List Server)\n", owner);
fprintf(fh, "To: %s\n", owner);
fprintf(fh, "Subject: Petidomo: BOUNCE %s@%s: Non-member submission from \"%s\"\n", listname, ListConfig->fqdn, MailStruct->From);
fprintf(fh, "Precedence: junk\n");
fprintf(fh, "Sender: %s\n", owner);
fprintf(fh, "\n");
fprintf(fh, "The following posting was rejected, because the sender\n" \
"\"%s\" is not subscribed to the list:\n\n", MailStruct->From);
fprintf(fh, "%s\n", MailStruct->Header);
fprintf(fh, "%s", MailStruct->Body);
CloseMailer(fh);
}
else
{
syslog(LOG_ERR, "Failed to send email to \"%s\" concerning this request.", owner);
exit(-1);
}
return;
}
}
else if (ListConfig->listtype == LIST_ACKED && !g_is_approved)
{
/* Every posting needs an acknowledgement. */
char* cookie;
char c;
char* originator = (MailStruct->Reply_To) ? MailStruct->Reply_To : MailStruct->From;
syslog(LOG_INFO, "\"%s\" tried to post to acknowledged list \"%s\"; posting " \
"has been deferred.", MailStruct->From, listname);
cookie = queue_posting(MailStruct, listname);
fh = vOpenMailer(owner, originator, NULL);
if (fh != NULL)
{
fprintf(fh, "From: petidomo-approve@%s (Petidomo Mailing List Server)\n", ListConfig->fqdn);
fprintf(fh, "To: %s\n", originator);
fprintf(fh, "Subject: Petidomo: APPROVE %s@%s: Your posting to list \"%s\"\n", listname, ListConfig->fqdn, listname);
fprintf(fh, "Precedence: junk\n");
fprintf(fh, "Sender: %s\n", owner);
fprintf(fh, "\n");
fprintf(fh, "Your posting needs to be approved. Reply to this mail and\n");
fprintf(fh, "concatenate the two following strings to one large string\n");
fprintf(fh, "\n");
c = cookie[16];
cookie[16] = '\0'; fprintf(fh, " %s\n", &cookie[ 0]);
cookie[16] = c; fprintf(fh, " %s\n", &cookie[16]);
fprintf(fh, "\n");
fprintf(fh, "This validates your will to send and your will to read.\n");
CloseMailer(fh);
}
else
{
syslog(LOG_ERR, "Failed to send email to \"%s\" concerning this request.", owner);
exit(-1);
}
return;
}
else if (ListConfig->listtype == LIST_ACKED_ONCE)
{
/* First posting needs an acknowledgement. */
if (g_is_approved)
{
syslog(LOG_INFO, "\"%s\" acknowledged a former posting attempt on ack-once list \"%s\"; " \
"add him to the ack file and let the posting pass.", MailStruct->From, listname);
rc = add_address(ListConfig->ack_file, MailStruct->From);
if (rc < 0)
{
syslog(LOG_ERR, "Can't add address to ack file.");
exit(-1);
}
}
else
{
char* originator = (MailStruct->Reply_To) ? MailStruct->Reply_To : MailStruct->From;
rc = is_address_on_list(ListConfig->ack_file, MailStruct->From);
if (rc == 0 && MailStruct->Reply_To)
rc = is_address_on_list(ListConfig->ack_file, MailStruct->Reply_To);
if (rc < 0)
{
syslog(LOG_ERR, "Can't verify whether address \"%s\" needs to be acknowledged or not.", MailStruct->From);
exit(-1);
}
else if (rc == 0)
{
char* cookie;
char c;
syslog(LOG_INFO, "\"%s\" tried to post to ack-once list \"%s\", but is posting " \
"for the first time; posting has been deferred.", MailStruct->From, listname);
cookie = queue_posting(MailStruct, listname);
fh = vOpenMailer(owner, originator, NULL);
if (fh != NULL)
{
fprintf(fh, "From: petidomo-approve@%s (Petidomo Mailing List Server)\n", ListConfig->fqdn);
fprintf(fh, "To: %s\n", originator);
fprintf(fh, "Subject: Petidomo: APPROVE %s@%s: Your posting to list \"%s\"\n",
listname, ListConfig->fqdn, listname);
fprintf(fh, "Precedence: junk\n");
fprintf(fh, "Sender: %s\n", owner);
fprintf(fh, "\n");
fprintf(fh, "Your posting needs to be approved. Reply to this mail and\n");
fprintf(fh, "concatenate the two following strings to one large string\n");
fprintf(fh, "\n");
c = cookie[16];
cookie[16] = '\0'; fprintf(fh, " %s\n", &cookie[ 0]);
cookie[16] = c; fprintf(fh, " %s\n", &cookie[16]);
fprintf(fh, "\n");
fprintf(fh, "This validates your will to send and your will to read.\n");
fprintf(fh, "You won't have to repeat that action in the future.\n");
CloseMailer(fh);
}
else
{
syslog(LOG_ERR, "Failed to send email to \"%s\" concerning this request.", owner);
exit(-1);
}
return;
}
else
syslog(LOG_INFO, "\"%s\" tried to post to ack-once list \"%s\" and has been found in " \
"the ack file; letting posting pass.", MailStruct->From, listname);
}
}
}
/* additional ACL check */
if (isValidPostingPassword(MailStruct->Approve, listname) == FALSE)
{
if (checkACL(MailStruct, listname, &operation, ¶meter, ACL_POST) != 0)
{
syslog(LOG_ERR, "checkACL() failed with an error.");
exit(1);
}
rc = handleACL(MailStruct, listname, operation, parameter);
switch(rc)
{
case -1:
syslog(LOG_ERR, "handleACL() failed with an error.");
exit(1);
case 0:
break;
case 1:
return;
}
}
/* Copy the desired headers from the original mail to our own
buffer. */
for(len = 0, currLine = MailStruct->Header, dst = PostingHeaders;
*currLine != '\0';
currLine = nextLine)
{
/* Find next header line. */
nextLine = text_find_next_line(currLine);
while (*nextLine == '\t' || *nextLine == ' ')
nextLine = text_find_next_line(nextLine);
/* Copy the current line into our own buffer. */
if (!strncasecmp(currLine, "From:", 5) ||
!strncasecmp(currLine, "To:", 3) ||
!strncasecmp(currLine, "Cc:", 3) ||
!strncasecmp(currLine, "Subject:", 8) ||
!strncasecmp(currLine, "Date:", 5) ||
!strncasecmp(currLine, "MIME-Version:", 13) ||
!strncasecmp(currLine, "Content-Type:", 13) ||
!strncasecmp(currLine, "Content-Transfer-Encoding:", 26) ||
!strncasecmp(currLine, "In-Reply-To:", 12) ||
!strncasecmp(currLine, "References:", 11) ||
!strncasecmp(currLine, "Message-Id:", 11) ||
!strncasecmp(currLine, "X-Spam-Flag:", 12) ||
!strncasecmp(currLine, "Keywords:", 11) ||
!strncasecmp(currLine, "Summary:", 11) ||
!strncasecmp(currLine, "Received:", 9))
{
len = nextLine - currLine;
memmove(dst, currLine, len);
dst += len;
}
}
/* Add a Reply-To: field. */
if (ListConfig->reply_to == NULL)
len = sprintf(dst, "Reply-To: %s@%s\n", listname, ListConfig->fqdn);
else if (!strcasecmp(ListConfig->reply_to, "none"))
{
if (MailStruct->Reply_To != NULL)
{
/* Copy Reply-To: line from original header. */
for(len = 0, currLine = MailStruct->Header;
*currLine != '\0';
currLine = nextLine)
{
nextLine = text_find_next_line(currLine);
while (*nextLine == '\t' || *nextLine == ' ')
nextLine = text_find_next_line(nextLine);
if (!strncasecmp(currLine, "Reply-To:", 9))
{
len = nextLine - currLine;
memmove(dst, currLine, len);
}
}
}
else
len = 0;
}
else
{
len = sprintf(dst, "Reply-To: %s\n", ListConfig->reply_to);
}
dst += len;
/* Add a Sender: field. */
len = sprintf(dst, "Sender: %s\n", owner);
dst += len;
/* Add a Precedence: field. */
len = sprintf(dst, "Precedence: list\n");
dst += len;
*dst = '\0';
/* Add custom headers if there are any. */
if (stat(ListConfig->header_file, &sb) == 0)
{
char* p = loadfile(ListConfig->header_file);
if (p == NULL)
{
syslog(LOG_ERR, "Failed reading the header file for list \"%s\".", listname);
exit(1);
}
strcpy(dst, p);
dst += strlen(p);
free(p);
}
/* Add the signature if there is one. */
if (stat(ListConfig->sig_file, &sb) == 0)
{
buffer = loadfile(ListConfig->sig_file);
if (buffer == NULL)
{
syslog(LOG_ERR, "Failed reading the signature file for list \"%s\".", listname);
exit(1);
}
MailStruct->ListSignature = buffer;
}
/* No more modifications will be made. Now copy the posting
headers into the structure instead of the original ones. */
MailStruct->Header = PostingHeaders;
/* Apply the posting filter. */
if (ListConfig->postingfilter != NULL)
{
rc = MailFilter(MailStruct, ListConfig->postingfilter);
if (rc != 0)
{
syslog(LOG_ERR, "Postingfilter \"%s\" returned error %d while processing posting " \
"for list \"%s\".", ListConfig->postingfilter, rc, listname);
exit(1);
}
}
/* Deliver the article to all recipients. */
rc = ListMail(envelope, listname, MailStruct);
if (rc != 0)
{
syslog(LOG_ERR, "The attempt to deliver the article to the subscribers failed.");
exit(1);
}
syslog(LOG_INFO, "Posted article from \"%s\" to list \"%s\" successfully.",
MailStruct->From, listname);
/* Archive the article. */
ArchiveMail(MailStruct, listname);
}
