Hi!
I've update my experimental DCC code currently found in the CVS. I did a diff
against the current CVS. Can someone apply it for me, please?
It patches exim-src/src/dcc.h, exim-src/src/dcc.c and
exim-doc/doc-txt/experimental-spec.txt.
Regards, Wolfgang Breyha
--
Wolfgang Breyha <wbreyha@???> |
http://www.blafasel.at/
Vienna University Computer Center | Austria
diff -urN exim-src/src/dcc.c exim-src-dcc/src/dcc.c
--- exim-src/src/dcc.c 2009-06-30 20:25:03.000000000 +0200
+++ exim-src-dcc/src/dcc.c 2009-09-03 12:34:17.000000000 +0200
@@ -1,10 +1,8 @@
-/* $Cambridge: exim/exim-src/src/dcc.c,v 1.2 2009/06/30 18:25:03 tom Exp $ */
-
/*************************************************
* Exim - an Internet mail transport agent *
*************************************************/
-/* Copyright (c) Wolfgang Breyha 2005-2008
+/* Copyright (c) Wolfgang Breyha 2005-2009
* Vienna University Computer Center
* wbreyha@???
* See the file NOTICE for conditions of use and distribution.
@@ -58,15 +56,16 @@
int dcc_sock;
uschar dcc_buffer[32600];
uschar *dcc_daemon_ip = US"";
- int dcc_daemon_port = 6276;
+ int dcc_daemon_port = 6276;
uschar *dcc_request = US"header";
uschar *dcc_default_ip_option = US"127.0.0.1";
uschar *dcc_ip_option = US"";
uschar *dcc_helo_option = US"localhost";
uschar *dcc_reject_message = US"Rejected by DCC";
+ uschar *xtra_hdrs = NULL;
/* from local_scan */
- int i, j, k, c, retval, sockfd, servlen, resp, rcpt_count, portnr, line;
+ int i, j, k, c, retval, sockfd, servlen, resp, portnr, line;
struct sockaddr_un serv_addr;
struct sockaddr_in serv_addr_in;
struct hostent *ipaddress;
@@ -82,9 +81,9 @@
uschar message_subdir[2];
struct header_line *dcchdr;
struct recipient_item *dcc_rcpt = recipients_list;
- int some;
uschar *dcc_acl_options;
uschar dcc_acl_options_buffer[10];
+ uschar dcc_xtra_hdrs[1024];
int offset, result;
uschar *p,*q;
@@ -123,7 +122,7 @@
};
sep = 0;
-
+
/* if we scanned this message last time, just return */
if ( dcc_ok )
return dcc_rc;
@@ -173,15 +172,15 @@
/* Do we have a sender_host_address or is it NULL? */
if(sender_host_address){
/* check if it is an ipv6 address */
- if(Ustrchr(sender_host_address, ':')){
+// if(Ustrchr(sender_host_address, ':')){
/* This is an IPv6 address
* For the moment we will not use it, but use 127.0.0.1 instead */
- DEBUG(D_acl)
- debug_printf("IPv6 address!\n");
- Ustrncpy(client_ip, dcc_default_ip_option, sizeof(client_ip)-1);
- } else {
+// DEBUG(D_acl)
+// debug_printf("IPv6 address!\n");
+// Ustrncpy(client_ip, dcc_default_ip_option, sizeof(client_ip)-1);
+// } else {
Ustrncpy(client_ip, sender_host_address, sizeof(client_ip)-1);
- }
+// }
} else {
/* sender_host_address is NULL which means it comes from localhost */
Ustrncpy(client_ip, dcc_default_ip_option, sizeof(client_ip)-1);
@@ -199,7 +198,6 @@
/* initialize the other variables */
dcchdr = header_list;
- rcpt_count = 0;
/* we set the default return value to DEFER */
retval = DEFER;
@@ -380,10 +378,8 @@
******************************************************************/
line = 1; /* we start at the first line of the output */
- rcpt_count = 0; /* initializing the recipients counter */
j = 0; /* will be used as index for the recipients list */
k = 0; /* initializing the index of the X-DCC header: xhdr[k] */
- some = 0;
/* Let's read from the socket until there's nothing left to read */
bzero(recvbuf, sizeof(recvbuf));
@@ -399,7 +395,7 @@
* then increment the line counter */
if(recvbuf[i] == '\n') {
line++;
- }
+ }
else {
/* The first character of the first line is the
* overall response. If there's another character
@@ -412,48 +408,55 @@
DEBUG(D_acl)
debug_printf("Overall result = A\treturning OK\n");
Ustrcpy(dcc_return_text, "Mail accepted by DCC");
+ dcc_result = "A";
retval = OK;
- }
+ }
else if(recvbuf[i] == 'R') {
DEBUG(D_acl)
debug_printf("Overall result = R\treturning FAIL\n");
+ dcc_result = "R";
retval = FAIL;
if(sender_host_name) {
log_write(0, LOG_MAIN, "H=%s [%s] F=<%s>: rejected by DCC", sender_host_name, sender_host_address, sender_address);
- }
+ }
else {
log_write(0, LOG_MAIN, "H=[%s] F=<%s>: rejected by DCC", sender_host_address, sender_address);
}
Ustrncpy(dcc_return_text, dcc_reject_message, Ustrlen(dcc_reject_message) + 1);
- }
+ }
else if(recvbuf[i] == 'S') {
DEBUG(D_acl)
debug_printf("Overall result = S\treturning OK\n");
Ustrcpy(dcc_return_text, "Not all recipients accepted by DCC");
- some = 1;
+ /* Since we're in an ACL we want a global result
+ * so we accept for all */
+ dcc_result = "A";
retval = OK;
- }
+ }
else if(recvbuf[i] == 'G') {
DEBUG(D_acl)
debug_printf("Overall result = G\treturning FAIL\n");
Ustrcpy(dcc_return_text, "Greylisted by DCC");
- retval = DEFER;
- }
+ dcc_result = "G";
+ retval = FAIL;
+ }
else if(recvbuf[i] == 'T') {
DEBUG(D_acl)
debug_printf("Overall result = T\treturning DEFER\n");
retval = DEFER;
log_write(0,LOG_MAIN,"Temporary error with DCC: %s\n", recvbuf);
Ustrcpy(dcc_return_text, "Temporary error with DCC");
- }
+ dcc_result = "T";
+ }
else {
DEBUG(D_acl)
debug_printf("Overall result = something else\treturning DEFER\n");
retval = DEFER;
log_write(0,LOG_MAIN,"Unknown DCC response: %s\n", recvbuf);
Ustrcpy(dcc_return_text, "Unknown DCC response");
+ dcc_result = "T";
}
- }
+ }
else {
/* We're on the first line but not on the first character,
* there must be something wrong. */
@@ -461,52 +464,26 @@
debug_printf("Line = %d but i = %d != 0 character is %c - This is wrong!\n", line, i, recvbuf[i]);
log_write(0,LOG_MAIN,"Wrong header from DCC, output is %s\n", recvbuf);
}
- }
+ }
else if(line == 2) {
/* On the second line we get a list of
- * answer for each recipient */
- /* We only need to copy the list of recipients if we
- * accept the mail i.e. if retval is LOCAL_SCAN_ACCEPT */
-// I don't care about results "SOME" since we're in the DATA stage. So we've a global result
- if(some) {
- if(j > recipients_count - 1) {
- DEBUG(D_acl)
- debug_printf("More recipients returned than sent!\nSent %d recipients, got %d in return.\n", recipients_count, j);
- }
- else {
- if(recvbuf[i] == 'A') {
- DEBUG(D_acl)
- debug_printf("Accepted recipient: %c - %s\n", recvbuf[i], recipients_list[j].address);
-// Ustrcpy(dcc_rcpt[rcpt_count].address, recipients_list[j].address);
- rcpt_count++;
- }
- else {
- DEBUG(D_acl)
- debug_printf("Rejected recipient: %c - %s\n", recvbuf[i], recipients_list[j].address);
- }
- j++;
- }
- }
- else {
- DEBUG(D_acl)
- debug_printf("result was not SOME, so we take the overall result\n");
- }
- }
+ * answer for each recipient. We don't care about
+ * it because we're in an acl and so just take the
+ * global result. */
+ }
else if(line > 2) {
/* The third and following lines is the X-DCC header,
* so we store it in xhdr. */
/* check if we don't get more than what we can handle */
if(k < sizeof(xhdr)) { /* xhdr has a length of 120 */
-// DEBUG(D_acl)
-// debug_printf("Writing X-DCC header: k = %d recvbuf[%d] = %c\n", k, i, recvbuf[i]);
xhdr[k] = recvbuf[i];
k++;
- }
+ }
else {
DEBUG(D_acl)
debug_printf("We got more output than we can store in the X-DCC header. Truncating at 120 characters.\n");
}
- }
+ }
else {
/* Wrong line number. There must be a problem with the output. */
DEBUG(D_acl)
@@ -525,46 +502,38 @@
/* Now let's sum up what we've got. */
DEBUG(D_acl)
- debug_printf("\n--------------------------\nOverall result = %d\nNumber of recipients accepted: %d\nX-DCC header: %s\nReturn message: %s\n", retval, rcpt_count, xhdr, dcc_return_text);
-
- /* If some recipients were rejected, then rcpt_count is
- * less than the original recipients_count.
- * Then reconstruct the recipients list for those accepted
- * recipients only. */
- if((rcpt_count == 0) & (retval == OK)) { /* There should be at least 1 recipient; but who knows... */
- DEBUG(D_acl)
- debug_printf("List of accepted recipients is 0!\n");
- retval = FAIL;
- }
- else {
-/* if(rcpt_count < recipients_count) {
- recipients_count=0;
- for(i=0; i < rcpt_count; i++){
- DEBUG(D_acl)
- debug_printf("Adding the new recipient: %s\n", dcc_rcpt[i].address);
- receive_add_recipient(dcc_rcpt[i].address, -1);
- } */
- retval = OK;
- }
+ debug_printf("\n--------------------------\nOverall result = %d\nX-DCC header: %sReturn message: %s\ndcc_result: %s\n", retval, xhdr, dcc_return_text, dcc_result);
/* We only add the X-DCC header if it starts with X-DCC */
if(!(Ustrncmp(xhdr, "X-DCC", 5))){
dcc_header = xhdr;
if(dcc_direct_add_header) {
header_add(' ' , "%s", xhdr);
- /* since the MIME ACL already writes the .eml file to disk without DCC Header we've to earase it */
+ /* since the MIME ACL already writes the .eml file to disk without DCC Header we've to erase it */
unspool_mbox();
}
- }
+ }
else {
DEBUG(D_acl)
debug_printf("Wrong format of the X-DCC header: %s\n", xhdr);
}
+ /* check if we should add additional headers passed in acl_m_dcc_add_header */
+ if(dcc_direct_add_header) {
+ if (((xtra_hdrs = expand_string("$acl_m_dcc_add_header")) != NULL) && (xtra_hdrs[0] != '\0')) {
+ Ustrncpy(dcc_xtra_hdrs, xtra_hdrs, sizeof(dcc_xtra_hdrs) - 2);
+ if (dcc_xtra_hdrs[Ustrlen(dcc_xtra_hdrs)-1] != '\n')
+ Ustrcat(dcc_xtra_hdrs, "\n");
+ header_add(' ', "%s", dcc_xtra_hdrs);
+ DEBUG(D_acl)
+ debug_printf("adding additional headers in $acl_m_dcc_add_header: %s", dcc_xtra_hdrs);
+ }
+ }
+
dcc_ok = 1;
/* Now return to exim main process */
DEBUG(D_acl)
- debug_printf("Before returning to exim main process:\nreturn_text = %s - retval = %d\n", dcc_return_text, retval);
+ debug_printf("Before returning to exim main process:\nreturn_text = %s - retval = %d\ndcc_result = %s\n", dcc_return_text, retval, dcc_result);
(void)fclose(data_file);
return retval;
diff -urN exim-doc/doc-txt/experimental-spec.txt exim-doc-dcc/doc-txt/experimental-spec.txt
--- exim-doc/doc-txt/experimental-spec.txt 2009-06-11 16:07:57.000000000 +0200
+++ exim-doc-dcc/doc-txt/experimental-spec.txt 2009-09-03 13:02:02.000000000 +0200
@@ -463,6 +463,56 @@
in your Local/Makefile.
+DCC Support
+--------------------------------------------------------------
+
+*) Building exim
+
+In order to build exim with DCC support add
+EXPERIMENTAL_DCC=yes
+to your Makefile. (Re-)build/install exim. exim -d should show
+EXPERIMENTAL_DCC under "Support for".
+
+*) Configuration
+
+In the main section of exim.cf add at least
+dccifd_address = /usr/local/dcc/var/dccifd
+or
+dccifd_address = <ip> <port>
+
+In the DATA ACL you can use the new condition
+ dcc = *
+
+After that "dcc_header" contains the X-DCC-Header.
+
+*** WARNING: return codes changed from previous releases!
+
+Returnvalues are:
+fail for overall "R", "G" from dccifd
+defer for overall "T" from dccifd
+accept for overall "A", "S" from dccifd
+
+dcc = */defer_ok works as for spamd.
+
+dcc_result contains the overall result from DCC answer
+
+usually you'll use
+defer !dcc = *
+to greylist with DCC.
+if
+dcc_direct_add_header = true
+is set, then the dcc header will be added "in deep" and if the spool file was
+already written it gets removed. This forces exim to write it again if needed.
+This helps to get the DCC Header through to eg. SpamAssassin.
+
+if you want to pass even more headers in the middle of the DATA stage you can
+use
+$acl_m_dcc_add_header
+to add information from eg. ClamAV.
+
+Be carefull. Header syntax is not checked and added "as is".
+
+
--------------------------------------------------------------
End of file
--------------------------------------------------------------
