swanctl: Add a list-conns command to query loaded connections

src/swanctl/Makefile.am

@@ -7,6 +7,7 @@ swanctl_SOURCES = \
 	commands/install.c \
 	commands/list_sas.c \
 	commands/list_pols.c \
+	commands/list_conns.c \
 	commands/load_conns.c \
 	commands/load_creds.c \
 	commands/version.c \

src/swanctl/commands/list_conns.c

@@ -0,0 +1,219 @@
+/*
+ * Copyright (C) 2014 Martin Willi
+ * Copyright (C) 2014 revosec AG
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ */
+
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <errno.h>
+
+#include "command.h"
+
+#include <collections/hashtable.h>
+
+/**
+ * Free hashtable with contained strings
+ */
+static void free_hashtable(hashtable_t *hashtable)
+{
+	enumerator_t *enumerator;
+	char *str;
+
+	enumerator = hashtable->create_enumerator(hashtable);
+	while (enumerator->enumerate(enumerator, NULL, &str))
+	{
+		free(str);
+	}
+	enumerator->destroy(enumerator);
+
+	hashtable->destroy(hashtable);
+}
+
+CALLBACK(values, int,
+	hashtable_t *sa, vici_res_t *res, char *name, void *value, int len)
+{
+	chunk_t chunk;
+	char *str;
+
+	chunk = chunk_create(value, len);
+	if (chunk_printable(chunk, NULL, ' '))
+	{
+		if (asprintf(&str, "%.*s", len, value) >= 0)
+		{
+			free(sa->put(sa, name, str));
+		}
+	}
+	return 0;
+}
+
+
+CALLBACK(list, int,
+	hashtable_t *sa, vici_res_t *res, char *name, void *value, int len)
+{
+	chunk_t chunk;
+	char *str;
+
+	chunk = chunk_create(value, len);
+	if (chunk_printable(chunk, NULL, ' '))
+	{
+		str = sa->get(sa, name);
+		if (asprintf(&str, "%s%s%.*s",
+					 str ?: "", str ? " " : "", len, value) >= 0)
+		{
+			free(sa->put(sa, name, str));
+		}
+	}
+	return 0;
+}
+
+CALLBACK(children_sn, int,
+	hashtable_t *ike, vici_res_t *res, char *name)
+{
+	hashtable_t *child;
+	int ret;
+
+	child = hashtable_create(hashtable_hash_str, hashtable_equals_str, 1);
+	ret = vici_parse_cb(res, NULL, values, list, child);
+	if (ret == 0)
+	{
+		printf("  %s: %s\n", name, child->get(child, "mode"));
+		printf("    local:  %s\n", child->get(child, "local-ts"));
+		printf("    remote: %s\n", child->get(child, "remote-ts"));
+	}
+	free_hashtable(child);
+	return ret;
+}
+
+CALLBACK(conn_sn, int,
+	hashtable_t *ike, vici_res_t *res, char *name)
+{
+	int ret = 0;
+
+	if (streq(name, "children"))
+	{
+		return vici_parse_cb(res, children_sn, NULL, NULL, NULL);
+	}
+	if (streq(name, "local") || streq(name, "remote"))
+	{
+		hashtable_t *auth;
+
+		auth = hashtable_create(hashtable_hash_str, hashtable_equals_str, 1);
+		ret = vici_parse_cb(res, NULL, values, list, auth);
+		if (ret == 0)
+		{
+			printf("  %s %s authentication:\n",
+				name, auth->get(auth, "class") ?: "unspecified");
+			if (auth->get(auth, "id"))
+			{
+				printf("    id: %s\n", auth->get(auth, "id"));
+			}
+			if (auth->get(auth, "groups"))
+			{
+				printf("    groups: %s\n", auth->get(auth, "groups"));
+			}
+			if (auth->get(auth, "certs"))
+			{
+				printf("    certs: %s\n", auth->get(auth, "certs"));
+			}
+			if (auth->get(auth, "cacerts"))
+			{
+				printf("    cacerts: %s\n", auth->get(auth, "cacerts"));
+			}
+		}
+		free_hashtable(auth);
+	}
+	return ret;
+}
+
+CALLBACK(conns, int,
+	void *null, vici_res_t *res, char *name)
+{
+	printf("%s: %s\n", name, vici_find_str(res, "", "%s.version", name));
+
+	return vici_parse_cb(res, conn_sn, NULL, NULL, NULL);
+}
+
+CALLBACK(list_cb, void,
+	bool *raw, char *name, vici_res_t *res)
+{
+	if (*raw)
+	{
+		vici_dump(res, "list-conn event", stdout);
+	}
+	else
+	{
+		if (vici_parse_cb(res, conns, NULL, NULL, NULL) != 0)
+		{
+			fprintf(stderr, "parsing conn event failed: %s\n", strerror(errno));
+		}
+	}
+}
+
+static int list_conns(vici_conn_t *conn)
+{
+	vici_req_t *req;
+	vici_res_t *res;
+	bool raw = FALSE;
+	char *arg;
+
+	while (TRUE)
+	{
+		switch (command_getopt(&arg))
+		{
+			case 'h':
+				return command_usage(NULL);
+			case 'r':
+				raw = TRUE;
+				continue;
+			case EOF:
+				break;
+			default:
+				return command_usage("invalid --list-conns option");
+		}
+		break;
+	}
+	if (vici_register(conn, "list-conn", list_cb, &raw) != 0)
+	{
+		fprintf(stderr, "registering for connections failed: %s\n",
+				strerror(errno));
+		return errno;
+	}
+	req = vici_begin("list-conns");
+	res = vici_submit(req, conn);
+	if (!res)
+	{
+		fprintf(stderr, "list-conns request failed: %s\n", strerror(errno));
+		return errno;
+	}
+	if (raw)
+	{
+		vici_dump(res, "list-conns reply", stdout);
+	}
+	vici_free_res(res);
+	return 0;
+}
+
+/**
+ * Register the command.
+ */
+static void __attribute__ ((constructor))reg()
+{
+	command_register((command_t) {
+		list_conns, 'L', "list-conns", "list loaded configurations",
+		{"[--raw]"},
+		{
+			{"help",		'h', 0, "show usage information"},
+			{"raw",			'r', 0, "dump raw response message"},
+		}
+	});
+}