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/*
* Copyright (c) 2014
* Canonical, Ltd. (All rights reserved)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public
* License published by the Free Software Foundation.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, contact Novell, Inc. or Canonical
* Ltd.
*/
#include <stdlib.h>
#include <string.h>
#include <sys/apparmor.h>
#include <iomanip>
#include <string>
#include <iostream>
#include <sstream>
#include "network.h"
#include "parser.h"
#include "profile.h"
#include "parser_yacc.h"
#include "af_rule.h"
/* need to move this table to stl */
static struct supported_cond supported_conds[] = {
{ "type", true, false, false, local_cond },
{ "protocol", false, false, false, local_cond },
{ "label", true, false, false, peer_cond },
{ NULL, false, false, false, local_cond }, /* eol sentinel */
};
bool af_rule::cond_check(struct supported_cond *conds, struct cond_entry *ent,
bool peer, const char *rname)
{
struct supported_cond *i;
for (i = conds; i->name; i++) {
if (strcmp(ent->name, i->name) != 0)
continue;
if (!i->supported)
yyerror("%s rule: '%s' conditional is not currently supported\n", rname, ent->name);
if (!peer && (i->side == peer_cond))
yyerror("%s rule: '%s' conditional is only valid in the peer expression\n", rname, ent->name);
if (peer && (i->side == local_cond))
yyerror("%s rule: '%s' conditional is not allowed in the peer expression\n", rname, ent->name);
if (!ent->eq && !i->in)
yyerror("%s rule: keyword 'in' is not allowed in '%s' socket conditional\n", rname, ent->name);
if (list_len(ent->vals) > 1 && !i->multivalue)
yyerror("%s rule: conditional '%s' only supports a single value\n", rname, ent->name);
return true;
}
/* not in support table */
return false;
}
/* generic af supported conds.
* returns: true if processed, else false
*/
int af_rule::move_base_cond(struct cond_entry *ent, bool peer)
{
if (!cond_check(supported_conds, ent, peer, "unknown"))
return false;
if (strcmp(ent->name, "type") == 0) {
move_conditional_value("socket rule", &sock_type, ent);
sock_type_n = net_find_type_val(sock_type);
if (sock_type_n == -1)
yyerror("socket rule: invalid socket type '%s'", sock_type);
} else if (strcmp(ent->name, "protocol") == 0) {
yyerror("socket rule: 'protocol' conditional is not currently supported\n");
} else if (strcmp(ent->name, "label") == 0) {
if (!peer)
move_conditional_value("unix", &label, ent);
else
move_conditional_value("unix", &peer_label, ent);
} else
return false;
return true;
}
ostream &af_rule::dump_local(ostream &os)
{
if (perms != AA_VALID_NET_PERMS) {
os << " (";
if (perms & AA_NET_SEND)
os << "send ";
if (perms & AA_NET_RECEIVE)
os << "receive ";
if (perms & AA_NET_CREATE)
os << "create ";
if (perms & AA_NET_SHUTDOWN)
os << "shutdown ";
if (perms & AA_NET_CONNECT)
os << "connect ";
if (perms & AA_NET_SETATTR)
os << "setattr ";
if (perms & AA_NET_GETATTR)
os << "getattr ";
if (perms & AA_NET_BIND)
os << "bind ";
if (perms & AA_NET_ACCEPT)
os << "accept ";
if (perms & AA_NET_LISTEN)
os << "listen ";
if (perms & AA_NET_SETOPT)
os << "setopt ";
if (perms & AA_NET_GETOPT)
os << "getopt ";
os << ")";
}
if (sock_type)
os << " type=" << sock_type;
if (proto)
os << " protocol=" << proto;
return os;
}
ostream &af_rule::dump_peer(ostream &os)
{
if (peer_label)
os << " label=\"" << peer_label << "\"";
return os;
}
ostream &af_rule::dump(ostream &os)
{
prefix_rule_t::dump(os);
os << af_name();
dump_local(os);
if (has_peer_conds()) {
os << " peer=(";
dump_peer(os);
os << ")";
}
os << ",\n";
return os;
}
int af_rule::expand_variables(void)
{
int error = expand_entry_variables(&label);
if (error)
return error;
error = expand_entry_variables(&peer_label);
if (error)
return error;
return 0;
}
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