Manual Pages  — NG_NETFLOW

• SYNOPSIS
• DESCRIPTION
• HOOKS
• CONTROL MESSAGES
• SHUTDOWN
• EXAMPLES
• SEE ALSO
• AUTHORS
• BUGS

struct ng_netflow_setdlt {
        uint16_t iface;         /* which iface dlt change */
        uint8_t  dlt;           /* DLT_XXX from bpf.h */
};

The requested ifaceN hook must already be connected, otherwise message send operation will return an error.

struct ng_netflow_setifindex {
        uint16_t iface;         /* which iface index change */
        uint16_t index;         /* new index */
};

The requested ifaceN hook must already be connected, otherwise the message send operation will return an error.

struct ng_netflow_settimeouts {
        uint32_t inactive_timeout;      /* flow inactive timeout */
        uint32_t active_timeout;        /* flow active timeout */
};

struct ng_netflow_setconfig {
        uint16_t iface;         /* which iface config change */
        uint32_t conf;          /* new config */
#define NG_NETFLOW_CONF_INGRESS         1
#define NG_NETFLOW_CONF_EGRESS          2
#define NG_NETFLOW_CONF_ONCE            4
#define NG_NETFLOW_CONF_THISONCE        8
#define NG_NETFLOW_CONF_NOSRCLOOKUP     16
#define NG_NETFLOW_CONF_NODSTLOOKUP     32
};

Configuration is a bitmask of several options. Option NG_NETFLOW_CONF_INGRESS enabled by default enables ingress NetFlow generation (for data coming from ifaceX hook). Option NG_NETFLOW_CONF_EGRESS enables egress NetFlow (for data coming from outX hook). Option NG_NETFLOW_CONF_ONCE defines that packet should be accounted only once if it several times passes via netflow node. Option NG_NETFLOW_CONF_THISONCE defines that packet should be accounted only once if it several times passes via exactly this netflow node. These two options are important to avoid duplicate accounting when both ingress and egress NetFlow are enabled. Option NG_NETFLOW_CONF_NOSRCLOOKUP skips radix lookup on flow source address used to fill in network mask. Option NG_NETFLOW_CONF_NODSTLOOKUP skips radix lookup on destination (which fills egress interface id, destination mask and gateway). If one doesn't need data provided by lookups, he/she can disable them, to reduce load on routers.

struct ng_netflow_settemplate {
        uint16_t time;          /* max time between announce */
        uint16_t packets;       /* max packets between announce */
};

Value of time field represents time in seconds to re-announce data templates. Value of packets field represents maximum packets count between re-announcing data templates.

struct ng_netflow_setemtu {
        uint16_t mtu;           /* MTU for packet */
};

Default is 1500 bytes.

struct ng_netflow_v9info {
    uint16_t        templ_packets;  /* v9 template packets */
    uint16_t        templ_time;     /* v9 template time */
    uint16_t        mtu;            /* v9 MTU */
};