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/*
* Copyright 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* test_utils.cpp - miscellaneous unit test utilities.
*/
#include <cstdio>
#include <string>
#include <vector>
#include <android-base/stringprintf.h>
#include "test_utils.h"
#define IP_PATH "/system/bin/ip"
using android::base::StringPrintf;
int randomUid() {
// Pick a random UID consisting of:
// - Random user profile (0 - 6)
// - Random app ID starting from 12000 (FIRST_APPLICATION_UID + 2000). This ensures no conflicts
// with existing app UIDs unless the user has installed more than 2000 apps, and is still less
// than LAST_APPLICATION_UID (19999).
return 100000 * arc4random_uniform(7) + 12000 + arc4random_uniform(3000);
}
std::vector<std::string> runCommand(const std::string& command) {
std::vector<std::string> lines;
FILE* f = popen(command.c_str(), "r"); // NOLINT(cert-env33-c)
if (f == nullptr) {
perror("popen");
return lines;
}
char* line = nullptr;
size_t bufsize = 0;
ssize_t linelen = 0;
while ((linelen = getline(&line, &bufsize, f)) >= 0) {
lines.push_back(std::string(line, linelen));
free(line);
line = nullptr;
}
pclose(f);
return lines;
}
std::vector<std::string> listIpRules(const char* ipVersion) {
std::string command = StringPrintf("%s %s rule list", IP_PATH, ipVersion);
return runCommand(command);
}
std::vector<std::string> listIptablesRule(const char* binary, const char* chainName) {
std::string command = StringPrintf("%s -w -n -L %s", binary, chainName);
return runCommand(command);
}
int iptablesRuleLineLength(const char* binary, const char* chainName) {
return listIptablesRule(binary, chainName).size();
}
bool iptablesRuleExists(const char* binary, const char* chainName,
const std::string& expectedRule) {
std::vector<std::string> rules = listIptablesRule(binary, chainName);
for (const auto& rule : rules) {
if (rule.find(expectedRule) != std::string::npos) {
return true;
}
}
return false;
}
std::vector<std::string> listIpRoutes(const char* ipVersion, const char* table) {
std::string command = StringPrintf("%s %s route ls table %s", IP_PATH, ipVersion, table);
return runCommand(command);
}
bool ipRouteExists(const char* ipVersion, const char* table,
const std::vector<std::string>& ipRouteSubstrings) {
std::vector<std::string> routes = listIpRoutes(ipVersion, table);
for (const auto& route : routes) {
bool matched = true;
for (const auto& substring : ipRouteSubstrings) {
if (route.find(substring) == std::string::npos) {
matched = false;
break;
}
}
if (matched) {
return true;
}
}
return false;
}
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