Introduce a configuration file option for the server's UDS address.

Signed-off-by: Richard Cochran <richardcochran@gmail.com>

config.c

@@ -393,6 +393,11 @@ static enum parser_result parse_global_setting(const char *option,
 			return r;
 		*cfg->udp6_scope = uval;
 
+	} else if (!strcmp(option, "uds_address")) {
+		if (strlen(value) > MAX_IFNAME_SIZE)
+			return OUT_OF_RANGE;
+		strncpy(cfg->uds_address, value, MAX_IFNAME_SIZE);
+
 	} else if (!strcmp(option, "logging_level")) {
 		r = get_ranged_int(value, &val,
 				   PRINT_LEVEL_MIN, PRINT_LEVEL_MAX);

config.h

@@ -89,6 +89,7 @@ struct config {
 	unsigned char *ptp_dst_mac;
 	unsigned char *p2p_dst_mac;
 	unsigned char *udp6_scope;
+	char *uds_address;
 
 	int print_level;
 	int use_syslog;

default.cfg

@@ -59,6 +59,7 @@ transportSpecific	0x0
 ptp_dst_mac		01:1B:19:00:00:00
 p2p_dst_mac		01:80:C2:00:00:0E
 udp6_scope		0x0E
+uds_address		/var/run/ptp4l
 #
 # Default interface options
 #

gPTP.cfg

@@ -57,6 +57,7 @@ clock_servo		pi
 transportSpecific	0x1
 ptp_dst_mac		01:80:C2:00:00:0E
 p2p_dst_mac		01:80:C2:00:00:0E
+uds_address		/var/run/ptp4l
 #
 # Default interface options
 #

ptp4l.8

@@ -1,4 +1,4 @@
-.TH PTP4l 8 "July 2013" "linuxptp"
+.TH PTP4l 8 "October 2013" "linuxptp"
 .SH NAME
 ptp4l \- PTP Boundary/Ordinary Clock
 
@@ -354,6 +354,10 @@ will be used as the second byte of the primary address.  This option
 is only relevant with IPv6 transport.  See RFC 4291.  The default is
 0x0E for the global scope.
 .TP
+.B uds_address
+Specifies the address of the UNIX domain socket for receiving local
+management messages. The default is /var/run/ptp4l.
+.TP
 .B logging_level
 The maximum logging level of messages which should be printed.
 The default is 6 (LOG_INFO).

ptp4l.c

@@ -32,6 +32,7 @@
 #include "sk.h"
 #include "transport.h"
 #include "udp6.h"
+#include "uds.h"
 #include "util.h"
 #include "version.h"
 
@@ -111,6 +112,7 @@ static struct config cfg_settings = {
 	.ptp_dst_mac = ptp_dst_mac,
 	.p2p_dst_mac = p2p_dst_mac,
 	.udp6_scope = &udp6_scope,
+	.uds_address = uds_path,
 
 	.print_level = LOG_INFO,
 	.use_syslog = 1,