swanctl: Implement a list-pols command to query trap/shunt policies
authorMartin Willi <martin@revosec.ch>
Thu, 13 Feb 2014 15:13:09 +0000 (16:13 +0100)
committerMartin Willi <martin@revosec.ch>
Wed, 7 May 2014 13:48:13 +0000 (15:48 +0200)
src/swanctl/Makefile.am
src/swanctl/commands/list_pols.c [new file with mode: 0644]

index d269c22..45b8dad 100644 (file)
@@ -7,6 +7,7 @@ swanctl_SOURCES = \
        commands/install.c \
        commands/version.c \
        commands/list_sas.c \
+       commands/list_pols.c \
        swanctl.c
 
 swanctl_LDADD = \
diff --git a/src/swanctl/commands/list_pols.c b/src/swanctl/commands/list_pols.c
new file mode 100644 (file)
index 0000000..a657538
--- /dev/null
@@ -0,0 +1,204 @@
+/*
+ * 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(policy_values, int,
+       hashtable_t *pol, 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(pol->put(pol, name, str));
+               }
+       }
+       return 0;
+}
+
+CALLBACK(policy_list, int,
+       hashtable_t *pol, 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 = pol->get(pol, name);
+               if (asprintf(&str, "%s%s%.*s",
+                                        str ?: "", str ? " " : "", len, value) >= 0)
+               {
+                       free(pol->put(pol, name, str));
+               }
+       }
+       return 0;
+}
+
+CALLBACK(policies, int,
+       void *null, vici_res_t *res, char *name)
+{
+       hashtable_t *pol;
+       int ret;
+
+       pol = hashtable_create(hashtable_hash_str, hashtable_equals_str, 1);
+       ret = vici_parse_cb(res, NULL, policy_values, policy_list, pol);
+
+       printf("%s, %s\n", name, pol->get(pol, "mode"));
+       printf("  local:  %s\n", pol->get(pol, "local-ts"));
+       printf("  remote: %s\n", pol->get(pol, "remote-ts"));
+
+       free_hashtable(pol);
+       return ret;
+}
+
+CALLBACK(list_cb, void,
+       bool *raw, char *name, vici_res_t *res)
+{
+       if (*raw)
+       {
+               vici_dump(res, "list-policy event", stdout);
+       }
+       else
+       {
+               if (vici_parse_cb(res, policies, NULL, NULL, NULL) != 0)
+               {
+                       fprintf(stderr, "parsing policy event failed: %s\n", strerror(errno));
+               }
+       }
+}
+
+static int list_pols(vici_conn_t *conn)
+{
+       vici_req_t *req;
+       vici_res_t *res;
+       bool raw = FALSE, trap = FALSE, drop = FALSE, pass = FALSE;
+       char *arg, *child = NULL;
+
+       while (TRUE)
+       {
+               switch (command_getopt(&arg))
+               {
+                       case 'h':
+                               return command_usage(NULL);
+                       case 'c':
+                               child = arg;
+                               continue;
+                       case 't':
+                               trap = TRUE;
+                               continue;
+                       case 'd':
+                               drop = TRUE;
+                               continue;
+                       case 'p':
+                               pass = TRUE;
+                               continue;
+                       case 'r':
+                               raw = TRUE;
+                               continue;
+                       case EOF:
+                               break;
+                       default:
+                               return command_usage("invalid --list-pols option");
+               }
+               break;
+       }
+       if (!trap && !drop && !pass)
+       {
+               trap = drop = pass = TRUE;
+       }
+       if (vici_register(conn, "list-policy", list_cb, &raw) != 0)
+       {
+               fprintf(stderr, "registering for policies failed: %s\n",
+                               strerror(errno));
+               return errno;
+       }
+       req = vici_begin("list-policies");
+       if (child)
+       {
+               vici_add_key_valuef(req, "child", "%s", child);
+       }
+       if (trap)
+       {
+               vici_add_key_valuef(req, "trap", "yes");
+       }
+       if (drop)
+       {
+               vici_add_key_valuef(req, "drop", "yes");
+       }
+       if (pass)
+       {
+               vici_add_key_valuef(req, "pass", "yes");
+       }
+       res = vici_submit(req, conn);
+       if (!res)
+       {
+               fprintf(stderr, "list-policies request failed: %s\n", strerror(errno));
+               return errno;
+       }
+       if (raw)
+       {
+               vici_dump(res, "list-policies reply", stdout);
+       }
+       vici_free_res(res);
+       return 0;
+}
+
+/**
+ * Register the command.
+ */
+static void __attribute__ ((constructor))reg()
+{
+       command_register((command_t) {
+               list_pols, 'P', "list-pols", "list currently installed policies",
+               {"[--child <name>] [--trap] [--drop] [--pass] [--raw]"},
+               {
+                       {"help",                'h', 0, "show usage information"},
+                       {"child",               'c', 1, "filter policies by CHILD_SA config name"},
+                       {"trap",                't', 0, "list trap policies"},
+                       {"drop",                'd', 0, "list drop policies"},
+                       {"pass",                'p', 0, "list bypass policies"},
+                       {"raw",                 'r', 0, "dump raw response message"},
+               }
+       });
+}