esi_label.cc

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/*
 * Copyright (c) 2013 Juniper Networks, Inc. All rights reserved.
 */

#include "bgp/extended-community/esi_label.h"

#include <stdio.h>

#include <algorithm>
#include <string>

#include "base/parse_object.h"

using std::copy;
using std::fill;
using std::string;

EsiLabel::EsiLabel(const bytes_type &data) {
    copy(data.begin(), data.end(), data_.begin());
}

EsiLabel::EsiLabel(bool single_active) {
    fill(data_.begin(), data_.end(), 0);
    data_[0] = BgpExtendedCommunityType::Evpn;
    data_[1] = BgpExtendedCommunityEvpnSubType::EsiMplsLabel;
    if (single_active) {
        data_[2] |= 0x01;
    }
}

string EsiLabel::flags() const {
    return (data_[2] & 0x01) ? string("sa") : string("aa");
}

int EsiLabel::label() const {
    if (data_[0] == BgpExtendedCommunityType::Evpn &&
        data_[1] == BgpExtendedCommunityEvpnSubType::EsiMplsLabel) {
        int value = get_value(&data_[5], 3);
        return value >> 4;
    }
    return 0;
}

string EsiLabel::ToString() const {
    char temp[50];
    snprintf(temp, sizeof(temp), "esilabel:%s:%d", flags().c_str(), label());
    return string(temp);
}