-/* $Cambridge: exim/src/src/dcc.c,v 1.5 2009/11/12 08:34:23 nm4 Exp $ */
-
/*************************************************
* Exim - an Internet mail transport agent *
*************************************************/
-/* Copyright (c) Wolfgang Breyha 2005-2009
+/* Copyright (c) Wolfgang Breyha 2005 - 2015
* Vienna University Computer Center
* wbreyha@gmx.net
* See the file NOTICE for conditions of use and distribution.
+ *
+ * Copyright (c) The Exim Maintainers 2015 - 2016
*/
/* This patch is based on code from Tom Kistners exiscan (ACL integration) and
#include "unistd.h"
uschar dcc_header_str[256];
-uschar dcc_result_str[256];
int dcc_ok = 0;
int dcc_rc = 0;
int retval, rsp;
rsp = write(socket, buffer, Ustrlen(buffer));
DEBUG(D_acl)
- debug_printf("Result of the write() = %d\n", rsp);
+ debug_printf("DCC: Result of the write() = %d\n", rsp);
if(rsp < 0)
{
DEBUG(D_acl)
- debug_printf("Error writing buffer to socket: %s\n", strerror(errno));
+ debug_printf("DCC: Error writing buffer to socket: %s\n", strerror(errno));
retval = errno;
- } else {
+ }
+ else {
DEBUG(D_acl)
- debug_printf("Wrote buffer to socket:\n%s\n", buffer);
+ debug_printf("DCC: Wrote buffer to socket:\n%s\n", buffer);
retval = 0;
}
return retval;
}
-int dcc_process(uschar **listptr) {
+int
+dcc_process(uschar **listptr)
+{
int sep = 0;
- uschar *list = *listptr;
+ const uschar *list = *listptr;
FILE *data_file;
- uschar *dcc_daemon_ip = US"";
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;
+ uschar *override_client_ip = NULL;
/* from local_scan */
int i, j, k, c, retval, sockfd, resp, line;
uschar rcpt[128], from[128];
uschar sendbuf[4096];
uschar recvbuf[4096];
- uschar xhdr[256];
uschar dcc_return_text[1024];
- uschar mbox_path[1024];
uschar message_subdir[2];
struct header_line *dcchdr;
uschar *dcc_acl_options;
/* grep 1st option */
if ((dcc_acl_options = string_nextinlist(&list, &sep,
- dcc_acl_options_buffer,
- sizeof(dcc_acl_options_buffer))) != NULL)
- {
+ dcc_acl_options_buffer, sizeof(dcc_acl_options_buffer))))
+ {
/* parse 1st option */
- if ( (strcmpic(dcc_acl_options,US"false") == 0) ||
- (Ustrcmp(dcc_acl_options,"0") == 0) ) {
- /* explicitly no matching */
- return FAIL;
- };
-
- /* special cases (match anything except empty) */
- if ( (strcmpic(dcc_acl_options,US"true") == 0) ||
- (Ustrcmp(dcc_acl_options,"*") == 0) ||
- (Ustrcmp(dcc_acl_options,"1") == 0) ) {
- dcc_acl_options = dcc_acl_options;
- };
- }
- else {
- /* empty means "don't match anything" */
- return FAIL;
- };
+ if ( strcmpic(dcc_acl_options, US"false") == 0
+ || Ustrcmp(dcc_acl_options, "0") == 0
+ )
+ return FAIL; /* explicitly no matching */
+ }
+ else
+ return FAIL; /* empty means "don't match anything" */
sep = 0;
/* if we scanned this message last time, just return */
- if ( dcc_ok )
- return dcc_rc;
+ if (dcc_ok)
+ return dcc_rc;
/* open the spooled body */
message_subdir[1] = '\0';
- for (i = 0; i < 2; i++) {
- message_subdir[0] = (split_spool_directory == (i == 0))? message_id[5] : 0;
- sprintf(CS mbox_path, "%s/input/%s/%s-D", spool_directory, message_subdir, message_id);
- data_file = Ufopen(mbox_path,"rb");
- if (data_file != NULL)
+ for (i = 0; i < 2; i++)
+ {
+ message_subdir[0] = split_spool_directory == (i == 0) ? message_id[5] : 0;
+
+ if ((data_file = Ufopen(
+ spool_fname(US"input", message_subdir, message_id, US"-D"),
+ "rb")))
break;
- };
+ }
- if (data_file == NULL) {
+ if (!data_file)
+ {
/* error while spooling */
log_write(0, LOG_MAIN|LOG_PANIC,
"dcc acl condition: error while opening spool file");
return DEFER;
- };
+ }
/* Initialize the variables */
/* opts is what we send as dccifd options - see man dccifd */
/* We don't support any other option than 'header' so just copy that */
bzero(opts,sizeof(opts));
- Ustrncpy(opts, "header", sizeof(opts)-1);
- Ustrncpy(client_ip, dcc_ip_option, sizeof(client_ip)-1);
- /* If the dcc_client_ip is not provided use the
- * sender_host_address or 127.0.0.1 if it is NULL */
- DEBUG(D_acl)
- debug_printf("my_ip_option = %s - client_ip = %s - sender_host_address = %s\n", dcc_ip_option, client_ip, sender_host_address);
- if(!(Ustrcmp(client_ip, ""))){
- /* Do we have a sender_host_address or is it NULL? */
- if(sender_host_address){
- 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);
- }
+ Ustrncpy(opts, dccifd_options, sizeof(opts)-1);
+ /* if $acl_m_dcc_override_client_ip is set use it */
+ if (((override_client_ip = expand_string(US"$acl_m_dcc_override_client_ip")) != NULL) &&
+ (override_client_ip[0] != '\0')) {
+ Ustrncpy(client_ip, override_client_ip, sizeof(client_ip)-1);
+ DEBUG(D_acl)
+ debug_printf("DCC: Client IP (overridden): %s\n", client_ip);
+ }
+ else if(sender_host_address) {
+ /* else if $sender_host_address is available use that? */
+ Ustrncpy(client_ip, sender_host_address, sizeof(client_ip)-1);
+ DEBUG(D_acl)
+ debug_printf("DCC: Client IP (sender_host_address): %s\n", client_ip);
+ }
+ else {
+ /* sender_host_address is NULL which means it comes from localhost */
+ Ustrncpy(client_ip, dcc_default_ip_option, sizeof(client_ip)-1);
+ DEBUG(D_acl)
+ debug_printf("DCC: Client IP (default): %s\n", client_ip);
}
- DEBUG(D_acl)
- debug_printf("Client IP: %s\n", client_ip);
- Ustrncpy(sockip, dcc_daemon_ip, sizeof(sockip)-1);
/* strncat(opts, my_request, strlen(my_request)); */
Ustrcat(opts, "\n");
Ustrncat(opts, client_ip, sizeof(opts)-Ustrlen(opts)-1);
retval = DEFER;
bzero(sendbuf,sizeof(sendbuf));
- bzero(xhdr,sizeof(xhdr));
+ bzero(dcc_header_str,sizeof(dcc_header_str));
bzero(rcpt,sizeof(rcpt));
bzero(from,sizeof(from));
* Now creating the socket connection *
**************************************/
- /* If there is a dcc_daemon_ip, we use a tcp socket, otherwise a UNIX socket */
+ /* If sockip contains an ip, we use a tcp socket, otherwise a UNIX socket */
if(Ustrcmp(sockip, "")){
ipaddress = gethostbyname((char *)sockip);
bzero((char *) &serv_addr_in, sizeof(serv_addr_in));
serv_addr_in.sin_port = htons(portnr);
if ((sockfd = socket(AF_INET, SOCK_STREAM,0)) < 0){
DEBUG(D_acl)
- debug_printf("Creating socket failed: %s\n", strerror(errno));
- log_write(0,LOG_REJECT,"Creating socket failed: %s\n", strerror(errno));
+ debug_printf("DCC: Creating TCP socket connection failed: %s\n", strerror(errno));
+ log_write(0,LOG_PANIC,"DCC: Creating TCP socket connection failed: %s\n", strerror(errno));
/* if we cannot create the socket, defer the mail */
(void)fclose(data_file);
return retval;
/* Now connecting the socket (INET) */
if (connect(sockfd, (struct sockaddr *)&serv_addr_in, sizeof(serv_addr_in)) < 0){
DEBUG(D_acl)
- debug_printf("Connecting socket failed: %s\n", strerror(errno));
- log_write(0,LOG_REJECT,"Connecting socket failed: %s\n", strerror(errno));
+ debug_printf("DCC: Connecting to TCP socket failed: %s\n", strerror(errno));
+ log_write(0,LOG_PANIC,"DCC: Connecting to TCP socket failed: %s\n", strerror(errno));
/* if we cannot contact the socket, defer the mail */
(void)fclose(data_file);
return retval;
}
} else {
/* connecting to the dccifd UNIX socket */
- bzero((char *)&serv_addr,sizeof(serv_addr));
+ bzero(&serv_addr, sizeof(serv_addr));
serv_addr.sun_family = AF_UNIX;
- Ustrcpy(serv_addr.sun_path, sockpath);
+ Ustrncpy(serv_addr.sun_path, sockpath, sizeof(serv_addr.sun_path));
if ((sockfd = socket(AF_UNIX, SOCK_STREAM,0)) < 0){
DEBUG(D_acl)
- debug_printf("Creating socket failed: %s\n", strerror(errno));
- log_write(0,LOG_REJECT,"Creating socket failed: %s\n", strerror(errno));
+ debug_printf("DCC: Creating UNIX socket connection failed: %s\n", strerror(errno));
+ log_write(0,LOG_PANIC,"DCC: Creating UNIX socket connection failed: %s\n", strerror(errno));
/* if we cannot create the socket, defer the mail */
(void)fclose(data_file);
return retval;
/* Now connecting the socket (UNIX) */
if (connect(sockfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0){
DEBUG(D_acl)
- debug_printf("Connecting socket failed: %s\n", strerror(errno));
- log_write(0,LOG_REJECT,"Connecting socket failed: %s\n", strerror(errno));
+ debug_printf("DCC: Connecting to UNIX socket failed: %s\n", strerror(errno));
+ log_write(0,LOG_PANIC,"DCC: Connecting to UNIX socket failed: %s\n", strerror(errno));
/* if we cannot contact the socket, defer the mail */
(void)fclose(data_file);
return retval;
}
/* the socket is open, now send the options to dccifd*/
DEBUG(D_acl)
- debug_printf("\n---------------------------\nSocket opened; now sending input\n-----------------\n");
+ debug_printf("\nDCC: ---------------------------\nDCC: Socket opened; now sending input\nDCC: -----------------\n");
/* First, fill in the input buffer */
Ustrncpy(sendbuf, opts, sizeof(sendbuf));
Ustrncat(sendbuf, from, sizeof(sendbuf)-Ustrlen(sendbuf)-1);
DEBUG(D_acl)
{
- debug_printf("opts = %s\nsender = %s\nrcpt count = %d\n", opts, from, recipients_count);
- debug_printf("Sending options:\n****************************\n");
+ debug_printf("DCC: opts = %s\nDCC: sender = %s\nDCC: rcpt count = %d\n", opts, from, recipients_count);
+ debug_printf("DCC: Sending options:\nDCC: ****************************\n");
}
/* let's send each of the recipients to dccifd */
for (i = 0; i < recipients_count; i++){
DEBUG(D_acl)
- debug_printf("recipient = %s\n",recipients_list[i].address);
+ debug_printf("DCC: recipient = %s\n",recipients_list[i].address);
if(Ustrlen(sendbuf) + Ustrlen(recipients_list[i].address) > sizeof(sendbuf))
{
DEBUG(D_acl)
- debug_printf("Writing buffer: %s\n", sendbuf);
+ debug_printf("DCC: Writing buffer: %s\n", sendbuf);
flushbuffer(sockfd, sendbuf);
bzero(sendbuf, sizeof(sendbuf));
}
Ustrncat(sendbuf, "\n", sizeof(sendbuf)-Ustrlen(sendbuf)-1);
/* Now we send the input buffer */
DEBUG(D_acl)
- debug_printf("%s\n****************************\n", sendbuf);
+ debug_printf("DCC: %s\nDCC: ****************************\n", sendbuf);
flushbuffer(sockfd, sendbuf);
/* now send the message */
/* First send the headers */
/* Now send the headers */
DEBUG(D_acl)
- debug_printf("Sending headers:\n****************************\n");
+ debug_printf("DCC: Sending headers:\nDCC: ****************************\n");
Ustrncpy(sendbuf, dcchdr->text, sizeof(sendbuf)-2);
while((dcchdr=dcchdr->next)) {
if(dcchdr->slen > sizeof(sendbuf)-2) {
Ustrncat(sendbuf, "\n", sizeof(sendbuf)-Ustrlen(sendbuf)-1);
flushbuffer(sockfd, sendbuf);
DEBUG(D_acl)
- debug_printf("\n****************************\n%s", sendbuf);
+ debug_printf("\nDCC: ****************************\n%s", sendbuf);
/* Clear the input buffer */
bzero(sendbuf, sizeof(sendbuf));
/* now send the body */
DEBUG(D_acl)
- debug_printf("Writing body:\n****************************\n");
+ debug_printf("DCC: Writing body:\nDCC: ****************************\n");
(void)fseek(data_file, SPOOL_DATA_START_OFFSET, SEEK_SET);
while((fread(sendbuf, 1, sizeof(sendbuf)-1, data_file)) > 0) {
flushbuffer(sockfd, sendbuf);
bzero(sendbuf, sizeof(sendbuf));
}
DEBUG(D_acl)
- debug_printf("\n****************************\n");
+ debug_printf("\nDCC: ****************************\n");
/* shutdown() the socket */
if(shutdown(sockfd, 1) < 0){
DEBUG(D_acl)
- debug_printf("Couldn't shutdown socket: %s\n", strerror(errno));
- log_write(0,LOG_MAIN,"Couldn't shutdown socket: %s\n", strerror(errno));
+ debug_printf("DCC: Couldn't shutdown socket: %s\n", strerror(errno));
+ log_write(0,LOG_MAIN,"DCC: Couldn't shutdown socket: %s\n", strerror(errno));
/* If there is a problem with the shutdown()
* defer the mail. */
(void)fclose(data_file);
return retval;
}
DEBUG(D_acl)
- debug_printf("\n-------------------------\nInput sent.\n-------------------------\n");
+ debug_printf("\nDCC: -------------------------\nDCC: Input sent.\nDCC: -------------------------\n");
/********************************
* receiving output from dccifd *
********************************/
DEBUG(D_acl)
- debug_printf("\n-------------------------------------\nNow receiving output from server\n-----------------------------------\n");
+ debug_printf("\nDCC: -------------------------------------\nDCC: Now receiving output from server\nDCC: -----------------------------------\n");
/******************************************************************
* We should get 3 lines: *
line = 1; /* we start at the first line of the output */
j = 0; /* will be used as index for the recipients list */
- k = 0; /* initializing the index of the X-DCC header: xhdr[k] */
+ k = 0; /* initializing the index of the X-DCC header: dcc_header_str[k] */
/* Let's read from the socket until there's nothing left to read */
bzero(recvbuf, sizeof(recvbuf));
/* How much did we get from the socket */
c = Ustrlen(recvbuf) + 1;
DEBUG(D_acl)
- debug_printf("Length of the output buffer is: %d\nOutput buffer is:\n------------\n%s\n-----------\n", c, recvbuf);
+ debug_printf("DCC: Length of the output buffer is: %d\nDCC: Output buffer is:\nDCC: ------------\nDCC: %s\nDCC: -----------\n", c, recvbuf);
/* Now let's read each character and see what we've got */
for(i = 0; i < c; i++) {
* return value accordingly */
if(recvbuf[i] == 'A') {
DEBUG(D_acl)
- debug_printf("Overall result = A\treturning OK\n");
+ debug_printf("DCC: Overall result = A\treturning OK\n");
Ustrcpy(dcc_return_text, "Mail accepted by DCC");
dcc_result = US"A";
retval = OK;
}
else if(recvbuf[i] == 'R') {
DEBUG(D_acl)
- debug_printf("Overall result = R\treturning FAIL\n");
+ debug_printf("DCC: Overall result = R\treturning FAIL\n");
dcc_result = US"R";
retval = FAIL;
if(sender_host_name) {
}
else if(recvbuf[i] == 'S') {
DEBUG(D_acl)
- debug_printf("Overall result = S\treturning OK\n");
+ debug_printf("DCC: Overall result = S\treturning OK\n");
Ustrcpy(dcc_return_text, "Not all recipients accepted by DCC");
/* Since we're in an ACL we want a global result
* so we accept for all */
}
else if(recvbuf[i] == 'G') {
DEBUG(D_acl)
- debug_printf("Overall result = G\treturning FAIL\n");
+ debug_printf("DCC: Overall result = G\treturning FAIL\n");
Ustrcpy(dcc_return_text, "Greylisted by DCC");
dcc_result = US"G";
retval = FAIL;
}
else if(recvbuf[i] == 'T') {
DEBUG(D_acl)
- debug_printf("Overall result = T\treturning DEFER\n");
+ debug_printf("DCC: 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");
}
else {
DEBUG(D_acl)
- debug_printf("Overall result = something else\treturning DEFER\n");
+ debug_printf("DCC: 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");
}
}
else {
- /* We're on the first line but not on the first character,
- * there must be something wrong. */
- DEBUG(D_acl)
- 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);
+ /* We're on the first line but not on the first character,
+ * there must be something wrong. */
+ DEBUG(D_acl) debug_printf("DCC: 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 don't care about
- * it because we're in an acl and so just take the
+ * answers for each recipient. We don't care about
+ * it because we're in an acl and 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 */
- xhdr[k] = recvbuf[i];
+ /* The third and following lines are the X-DCC header,
+ * so we store it in dcc_header_str. */
+ /* check if we don't get more than we can handle */
+ if(k < sizeof(dcc_header_str)) {
+ dcc_header_str[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");
+ DEBUG(D_acl) debug_printf("DCC: 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)
- debug_printf("Wrong line number in output. Line number is %d\n", line);
+ debug_printf("DCC: Wrong line number in output. Line number is %d\n", line);
}
}
}
}
/* We have read everything from the socket */
- /* We need the terminate the X-DCC header with a '\n' character. This needs to be k-1
- * for xhdr[k] contains '\0'. */
- xhdr[k-1] = '\n';
+ /* We need to terminate the X-DCC header with a '\n' character. This needs to be k-1
+ * since dcc_header_str[k] contains '\0'. */
+ dcc_header_str[k-1] = '\n';
/* Now let's sum up what we've got. */
DEBUG(D_acl)
- debug_printf("\n--------------------------\nOverall result = %d\nX-DCC header: %sReturn message: %s\ndcc_result: %s\n", retval, xhdr, dcc_return_text, dcc_result);
+ debug_printf("\nDCC: --------------------------\nDCC: Overall result = %d\nDCC: X-DCC header: %sReturn message: %s\nDCC: dcc_result: %s\n", retval, dcc_header_str, 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(!(Ustrncmp(dcc_header_str, "X-DCC", 5))){
+ dcc_header = dcc_header_str;
if(dcc_direct_add_header) {
- header_add(' ' , "%s", xhdr);
+ header_add(' ' , "%s", dcc_header_str);
/* 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);
+ debug_printf("DCC: Wrong format of the X-DCC header: %s\n", dcc_header_str);
}
/* check if we should add additional headers passed in acl_m_dcc_add_header */
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);
+ debug_printf("DCC: 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\ndcc_result = %s\n", dcc_return_text, retval, dcc_result);
+ debug_printf("DCC: Before returning to exim main process:\nDCC: return_text = %s - retval = %d\nDCC: dcc_result = %s\n", dcc_return_text, retval, dcc_result);
(void)fclose(data_file);
dcc_rc = retval;
git://git.exim.org / users / jgh / exim.git / blobdiff