pmc: add a command to select the target port.

This patch adds a new pmc command called "target" that lets the user
address a particular clock and port. Previously all management requests
were sent to the wild card address.

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

pmc.c

@@ -596,6 +596,19 @@ static int parse_id(char *s)
 	return index;
 }
 
+static int parse_target(const char *str)
+{
+	struct PortIdentity pid;
+
+	if (str[0] == '*') {
+		memset(&pid, 0xff, sizeof(pid));
+	} else if (str2pid(str, &pid)) {
+		return -1;
+	}
+
+	return pmc_target(pmc, &pid);
+}
+
 static void print_help(FILE *fp)
 {
 	int i;
@@ -608,6 +621,9 @@ static void print_help(FILE *fp)
 	fprintf(fp, "\tThe [action] can be GET, SET, CMD, or COMMAND\n");
 	fprintf(fp, "\tCommands are case insensitive and may be abbreviated.\n");
 	fprintf(fp, "\n");
+	fprintf(fp, "\tTARGET [portIdentity]\n");
+	fprintf(fp, "\tTARGET *\n");
+	fprintf(fp, "\n");
 }
 
 static int do_command(char *str)
@@ -623,6 +639,9 @@ static int do_command(char *str)
 	if (2 != sscanf(str, " %10s %64s", action_str, id_str))
 		return -1;
 
+	if (0 == strncasecmp(action_str, "TARGET", strlen(action_str)))
+		return parse_target(id_str);
+
 	action = parse_action(action_str);
 	id = parse_id(id_str);
 

util.c

@@ -82,6 +82,22 @@ char *pid2str(struct PortIdentity *id)
 	return buf;
 }
 
+int str2pid(const char *s, struct PortIdentity *result)
+{
+	struct PortIdentity pid;
+	unsigned char *ptr = pid.clockIdentity.id;
+	int c;
+	c = sscanf(s, " %02hhx%02hhx%02hhx.%02hhx%02hhx.%02hhx%02hhx%02hhx-%hu",
+		   &ptr[0], &ptr[1], &ptr[2], &ptr[3],
+		   &ptr[4], &ptr[5], &ptr[6], &ptr[7],
+		   &pid.portNumber);
+	if (c == 9) {
+		*result = pid;
+		return 0;
+	}
+	return -1;
+}
+
 int generate_clock_identity(struct ClockIdentity *ci, char *name)
 {
 	unsigned char mac[6];

util.h

@@ -55,6 +55,15 @@ char *cid2str(struct ClockIdentity *id);
  */
 char *pid2str(struct PortIdentity *id);
 
+/**
+ * Scan a string containing a port identity and convert it into binary form.
+ *
+ * @param s       String in human readable form.
+ * @param result  Pointer to a buffer to hold the result.
+ * @return Zero on success, or -1 if the string is incorrectly formatted.
+ */
+int str2pid(const char *s, struct PortIdentity *result);
+
 int generate_clock_identity(struct ClockIdentity *ci, char *name);
 
 /**