vty: make 'show calls summary' more userfriendly

Display a table with one row per call (instead of two lines per call),
and display the phone numbers of the people making the calls instead of
internal IDs. This should make the VTY command friendlier for end users,
especially if they have bigger networks. There is still the 'show calls'
command with all the verbose output.

Example output:

OsmoSIPcon> show calls summary
No active calls.

OsmoSIPcon> show calls summary
ID    From                             To                               State
----- -------------------------------- -------------------------------- ----------
 5001 101                              100                              PROCEEDING

OsmoSIPcon> show calls summary
ID    From                             To                               State
----- -------------------------------- -------------------------------- ----------
 5001 101                              100                              CONNECTED

Relates: OS#1680
Change-Id: I2092d58d80a34e6083f618593b92bb9e838aa906

1 files changed, 26 insertions, 29 deletions

diff --git a/src/vty.c b/src/vty.c
index 3c9ade1..c11a976 100644
--- a/src/vty.c
+++ b/src/vty.c
@@ -256,39 +256,36 @@ DEFUN(show_calls_sum, show_calls_sum_cmd,
 	"show calls summary",
 	SHOW_STR "Current calls\nBrief overview\n")
 {
-	struct call *call;
-
-	llist_for_each_entry(call, &g_call_list, entry) {
-		char *initial_type, *initial_state;
-		char *remote_type, *remote_state;
-
-		initial_type = initial_state = NULL;
-		remote_type = remote_state = NULL;
+	/* don't print a table for zero active calls */
+	if(llist_empty(&g_call_list)) {
+		vty_out(vty, "No active calls.%s", VTY_NEWLINE);
+		return CMD_SUCCESS;
+	}
 
-		if (call->initial) {
-			initial_type = talloc_strdup(tall_mncc_ctx,
-						call_leg_type(call->initial));
-			initial_state = talloc_strdup(tall_mncc_ctx,
-						call_leg_state(call->initial));
-		}
+	/* table head */
+	vty_out(vty, "ID    From                             To                               State%s", VTY_NEWLINE);
+	vty_out(vty, "----- -------------------------------- -------------------------------- ----------%s",
+		VTY_NEWLINE);
 
-		if (call->remote) {
-			remote_type = talloc_strdup(tall_mncc_ctx,
-						call_leg_type(call->remote));
-			remote_state = talloc_strdup(tall_mncc_ctx,
-						call_leg_state(call->remote));
+	/* iterate over calls */
+	struct call *call;
+	llist_for_each_entry(call, &g_call_list, entry) {
+		/* only look at the initial=MNCC call */
+		if(call->initial->type == CALL_TYPE_MNCC) {
+			struct mncc_call_leg *leg = (struct mncc_call_leg *) call->initial;
+
+			/* table row */
+			char *called = talloc_strdup(tall_mncc_ctx, leg->called.number);
+			char *calling = talloc_strdup(tall_mncc_ctx, leg->calling.number);
+			char *state = talloc_strdup(tall_mncc_ctx, call_leg_state(call->initial));
+			vty_out(vty, "%5u %-32s %-32s %s%s", call->id, calling, called, state, VTY_NEWLINE);
+
+			/* clean up */
+			talloc_free(called);
+			talloc_free(calling);
+			talloc_free(state);
 		}
-
-		vty_out(vty, "Call(%u) initial(type=%s,state=%s) remote(type=%s,state=%s)%s",
-			call->id, initial_type, initial_state, remote_type, remote_state,
-			VTY_NEWLINE);
-
-		talloc_free(initial_type);
-		talloc_free(initial_state);
-		talloc_free(remote_type);
-		talloc_free(remote_state);
 	}
-
 	return CMD_SUCCESS;
 }