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/*
* Copyright (c) 2018 PANTHEON.tech.
* Copyright (c) 2019 Cisco and/or its affiliates.
*
* 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.
*/
#ifndef __SYS_UTIL_H__
#define __SYS_UTIL_H__
//TODO: Add to only one header file
extern "C" {
#include <sysrepo.h>
#include <sysrepo/xpath.h>
#include <sysrepo/plugins.h>
}
#include <iostream>
#include <string>
#include <exception>
#include <boost/asio.hpp>
using namespace std;
/* BEGIN sysrepo utils */
#define foreach_change(ds, it, oper, old, newch) \
while( (event != SR_EV_ABORT) && \
sr_get_change_next(ds, it, &oper, &old, &newch) == SR_ERR_OK)
#define XPATH_SIZE 2000
#define ARG_CHECK(retval, arg) \
do \
{ \
if (NULL == (arg)) \
{ \
return (retval); \
} \
} \
while (0)
#define ARG_CHECK2(retval, arg1, arg2) \
ARG_CHECK(retval, arg1); \
ARG_CHECK(retval, arg2)
#define ARG_CHECK3(retval, arg1, arg2, arg3) \
ARG_CHECK(retval, arg1); \
ARG_CHECK(retval, arg2); \
ARG_CHECK(retval, arg3)
#define ARG_CHECK4(retval, arg1, arg2, arg3, arg4) \
ARG_CHECK(retval, arg1); \
ARG_CHECK(retval, arg2); \
ARG_CHECK(retval, arg3); \
ARG_CHECK(retval, arg4)
/* Suppress compiler warning about unused variable.
* This must be used only for callback function else suppress your unused
* parameter in function prototype. */
#define UNUSED(x) (void)x
/* END of sysrepo utils */
namespace utils {
/* Convert netmask to prefix length.
* 255.255.255.0->24
*/
inline uint8_t netmask_to_plen(boost::asio::ip::address netmask)
{
in_addr_t n = 0;
uint8_t i = 0;
int af;
int rc;
if (netmask.is_v4())
af = AF_INET;
else if (netmask.is_v6())
af = AF_INET6;
else
throw std::runtime_error("Invalid address family");
/* Convert address to binary form */
rc = inet_pton(af, netmask.to_string().c_str(), &n);
if (rc <= 0)
throw std::runtime_error("Fail converting netmask to prefix length");
while (n > 0) {
n = n >> 1;
i++;
}
return i;
}
class prefix {
public:
/* Default Constructor */
prefix();
/* Copy constructor */
prefix(const prefix &p);
/* Constuctor from string prefix */
prefix(std::string p);
/* Create a prefix from a string */
static prefix make_prefix(std::string p);
/* Return prefix "AAA.BBB.CCC.DDD/ZZ"
* "YYYY:YYYY:YYYY:YYYY:YYYY:YYYY:YYYY:YYYY/ZZZ */
std::string to_string() const;
/* Extract prefix length "ZZ"/"ZZZ" an IP prefix: "AAA.BBB.CCC.DDD/ZZ"
* "YYYY:YYYY:YYYY:YYYY:YYYY:YYYY:YYYY:YYYY/ZZZ */
unsigned short prefix_length() const;
/* Extract IP "AAA.BBB.CCC.DDD" from an IP prefix: "AAA.BBB.CCC.DDD/ZZ"
* "YYYY:YYYY:YYYY:YYYY:YYYY:YYYY:YYYY:YYYY/ZZZ */
boost::asio::ip::address address() const;
/* Return true if prefix is empty */
bool empty() const;
friend ostream& operator<<(ostream& os, const prefix& p);
private:
boost::asio::ip::address m_address;
unsigned short m_prefix_len;
};
} //end of utils namespace
#endif /* __SYS_UTIL_H__ */
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