File sysklogd-1.4.1-forw.patch of Package syslogd

---
 sysklogd.8 |    6 ++++++
 syslogd.c  |   26 +++++++++++++++++++++++++-
 2 files changed, 31 insertions(+), 1 deletion(-)

--- sysklogd.8
+++ sysklogd.8	2022-10-13 08:04:12.411821359 +0000
@@ -29,6 +29,7 @@ sysklogd \- Linux system logging utiliti
 .RB [ " \-s "
 .I domainlist
 ]
+.RB [ " \-t " ]
 .RB [ " \-v " ]
 .SH DESCRIPTION
 .B Sysklogd
@@ -150,6 +151,11 @@ is specified and the host logging resolv
 no domain would be cut, you will have to specify two domains like:
 .BR "\-s north.de:infodrom.north.de" .
 .TP
+.B "\-t"
+Tag forwarded messages with the sending hosts name as seen by the forwarder.
+Useful for relaying syslog from DMZs through the firwall to an internal
+loghost.
+.TP
 .B "\-v"
 Print version and exit.
 .SH SIGNALS
--- syslogd.c
+++ syslogd.c	2022-10-13 08:08:49.502856189 +0000
@@ -417,6 +417,13 @@ static char sccsid[] = "@(#)syslogd.c	5.
  *	file is defined in the used libc and should not be hardcoded
  *	into the syslogd binary referring the system it was compiled on.
  *
+ * Mon Oct 18 19:23:00 CEST 1999: Andreas Siegert <afx@suse.de>
+ *     Added -t flag that triggers tagging of forwarded messages with
+ *     the sending hosts name as seen by the forwarder.
+ *     Useful for relaying syslog from DMZs through the firwall to an
+ *     internal loghost.
+ *     Format is "<""hostname"
+ *
  * Sun Sep 17 21:26:16 CEST 2000: Martin Schulze <joey@infodrom.ffis.de>
  *	Don't close open sockets upon reload.  Thanks to Bill
  *	Nottingham.
@@ -787,6 +794,7 @@ int	MarkInterval = 20 * 60;	/* interval
 int	MarkSeq = 0;		/* mark sequence number */
 int	NoFork = 0; 		/* don't fork - don't run in daemon mode */
 int	AcceptRemote = 0;	/* receive messages that come via UDP */
+int	TagForward = 0;	        /* afx: tag remote messages with the hostname they came from */
 char	**StripDomains = NULL;	/* these domains may be stripped before writing logs */
 char	**LocalHosts = NULL;	/* these hosts are logged with their hostname */
 int	NoHops = 1;		/* Can we bounce syslog messages through an
@@ -888,7 +896,7 @@ int main(argc, argv)
 		funix[i]  = -1;
 	}
 
-	while ((ch = getopt(argc, argv, "a:dhf:l:m:np:rs:v")) != EOF)
+	while ((ch = getopt(argc, argv, "a:dhf:l:m:np:rs:tv")) != EOF)
 		switch((char)ch) {
 		case 'a':
 			if (nfunix < MAXFUNIX)
@@ -933,6 +941,10 @@ int main(argc, argv)
 			}
 			StripDomains = crunch_list(optarg);
 			break;
+/* afx  add -t for hostname tagging */
+		case 't':
+			TagForward = 1;
+			break;
 		case 'v':
 			printf("syslogd %s.%s\n", VERSION, PATCHLEVEL);
 			exit (0);
@@ -1872,6 +1884,18 @@ void fprintlog(f, from, flags, msg)
 			f->f_time = now;
 			(void) snprintf(line, sizeof(line), "<%d>%s", f->f_prevpri, \
 				(char *) iov[4].iov_base);
+/* afx: add <sourcehost */
+			if ((TagForward == 1) &&
+			    strncmp(f->f_prevhost,LocalHostName,MAXHOSTNAMELEN+1)) {
+				(void) snprintf(line, sizeof(line), "<%d><%s: %s\n",
+						f->f_prevpri, f->f_prevhost,
+						(char *) iov[4].iov_base);
+			} else {
+				(void) snprintf(line, sizeof(line), "<%d>%s\n",
+						f->f_prevpri,
+						(char *) iov[4].iov_base);
+			}
+/* end afx */
 			l = strlen(line);
 			if (l > MAXLINE)
 				l = MAXLINE;