bgp-capability.h

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#ifndef BGP_CAP_H_
#define BGP_CAP_H_
#include "bgp-afi.h"
#include "serializable.h"
#include <stdint.h>

namespace libbgp {

enum BgpCapabilityCode {
    MP_BGP = 1,
    ROUTE_REFRESH = 2,
    ORF = 3,
    EXTENDED_NEXTHOP = 5,
    BGPSEC = 7,
    MULTIPLE_LABELS = 8,
    GRACEFUL_RESTART = 64,
    ASN_4B = 65,
    ADD_PATH = 69,
    ENHANCED_ROUTE_REFRESH = 70
};

class BgpCapability : public Serializable {
public:
    BgpCapability(BgpLogHandler *logger);

    uint8_t code;
    virtual ~BgpCapability() {}

    virtual ssize_t parse(const uint8_t *from, size_t msg_sz) = 0;

    virtual ssize_t write(uint8_t *to, size_t buf_sz) const = 0;
protected:

    ssize_t parseHeader(const uint8_t *from, size_t msg_sz);

    uint8_t length;
};

class BgpCapability4BytesAsn : public BgpCapability {
public:
    BgpCapability4BytesAsn(BgpLogHandler *logger);

    ssize_t doPrint(size_t indent, uint8_t **to, size_t *buf_sz) const;
    ssize_t parse(const uint8_t *from, size_t msg_sz);
    ssize_t write(uint8_t *to, size_t buf_sz) const;

    uint32_t my_asn;
};

class BgpCapabilityMpBgp : public BgpCapability {
public:
    BgpCapabilityMpBgp(BgpLogHandler *logger);

    ssize_t doPrint(size_t indent, uint8_t **to, size_t *buf_sz) const;
    ssize_t parse(const uint8_t *from, size_t msg_sz);
    ssize_t write(uint8_t *to, size_t buf_sz) const;

    uint16_t afi;

    uint8_t safi;
};

class BgpCapabilityUnknow : public BgpCapability {
public:
    BgpCapabilityUnknow(BgpLogHandler *logger);
    ~BgpCapabilityUnknow();

    ssize_t doPrint(size_t indent, uint8_t **to, size_t *buf_sz) const;
    ssize_t parse(const uint8_t *from, size_t msg_sz);
    ssize_t write(uint8_t *to, size_t buf_sz) const;

private:
    uint8_t *value;
};

}

#endif // BGP_CAP_H_