* Exim - an Internet mail transport agent *
*************************************************/
-/* Copyright (c) Wolfgang Breyha 2005-2012
+/* 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 - 2018
*/
/* This patch is based on code from Tom Kistners exiscan (ACL integration) and
DEBUG(D_acl)
debug_printf("DCC: Error writing buffer to socket: %s\n", strerror(errno));
retval = errno;
- } else {
+ }
+ else {
DEBUG(D_acl)
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 sendbuf[4096];
uschar recvbuf[4096];
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("DCC: 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("DCC: 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);
* 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));
+ ipaddress = gethostbyname(CS sockip);
+ bzero(CS &serv_addr_in, sizeof(serv_addr_in));
serv_addr_in.sin_family = AF_INET;
- bcopy((char *)ipaddress->h_addr, (char *)&serv_addr_in.sin_addr.s_addr, ipaddress->h_length);
+ bcopy(CS ipaddress->h_addr, CS &serv_addr_in.sin_addr.s_addr, ipaddress->h_length);
serv_addr_in.sin_port = htons(portnr);
if ((sockfd = socket(AF_INET, SOCK_STREAM,0)) < 0){
DEBUG(D_acl)
}
} 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("DCC: Creating UNIX socket connection failed: %s\n", strerror(errno));
}
}
- /* a blank line seperates header from body */
+ /* a blank line separates header from body */
Ustrncat(sendbuf, "\n", sizeof(sendbuf)-Ustrlen(sendbuf)-1);
flushbuffer(sockfd, sendbuf);
DEBUG(D_acl)
}
}
else {
- /* 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);
+ /* 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) {
/* 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)) {
+ if(k < sizeof(dcc_header_str)) {
dcc_header_str[k] = recvbuf[i];
k++;
}
else {
- DEBUG(D_acl)
- debug_printf("DCC: 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 {
git://git.exim.org / exim.git / blobdiff