util-ebpf.h

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/* Copyright (C) 2018 Open Information Security Foundation
 *
 * You can copy, redistribute or modify this Program under the terms of
 * the GNU General Public License version 2 as published by the Free
 * Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * version 2 along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 */
 
/**
 * \file
 *
 * \author Eric Leblond <eric@regit.org>
 */
 
#ifndef SURICATA_UTIL_EBPF_H
#define SURICATA_UTIL_EBPF_H
 
#include "flow-bypass.h"
#include "conf.h"
 
#ifdef HAVE_PACKET_EBPF
 
#define XDP_FLAGS_UPDATE_IF_NOEXIST (1U << 0)
#define XDP_FLAGS_SKB_MODE      (1U << 1)
#define XDP_FLAGS_DRV_MODE      (1U << 2)
#define XDP_FLAGS_HW_MODE       (1U << 3)
 
 
struct flowv4_keys {
    __be32 src;
    __be32 dst;
    union {
        __be32 ports;
        __be16 port16[2];
    };
    __u8 ip_proto:1;
    __u16 vlan0:15;
    __u16 vlan1;
};
 
struct flowv6_keys {
    __be32 src[4];
    __be32 dst[4];
    union {
        __be32 ports;
        __be16 port16[2];
    };
    __u8 ip_proto:1;
    __u16 vlan0:15;
    __u16 vlan1;
};
 
struct pair {
    uint64_t packets;
    uint64_t bytes;
};
 
typedef struct EBPFBypassData_ {
    void *key[2];
    int mapfd;
    int cpus_count;
} EBPFBypassData;
 
#define EBPF_SOCKET_FILTER  (1<<0)
#define EBPF_XDP_CODE       (1<<1)
#define EBPF_PINNED_MAPS    (1<<2)
#define EBPF_XDP_HW_MODE    (1<<3)
 
int EBPFGetMapFDByName(const char *iface, const char *name);
int EBPFLoadFile(const char *iface, const char *path, const char * section,
                 int *val, struct ebpf_timeout_config *config);
int EBPFSetupXDP(const char *iface, int fd, uint8_t flags);
 
int EBPFCheckBypassedFlowCreate(ThreadVars *th_v, struct timespec *curtime, void *data);
 
void EBPFRegisterExtension(void);
 
void EBPFBuildCPUSet(SCConfNode *node, char *iface);
 
int EBPFSetPeerIface(const char *iface, const char *out_iface);
 
int EBPFUpdateFlow(Flow *f, Packet *p, void *data);
bool EBPFBypassUpdate(Flow *f, void *data, time_t tsec);
void EBPFBypassFree(void *data);
 
void EBPFDeleteKey(int fd, void *key);
 
#define __bpf_percpu_val_align  __attribute__((__aligned__(8)))
 
#define BPF_DECLARE_PERCPU(type, name, nr_cpus)                          \
        struct { type v; /* padding */ } __bpf_percpu_val_align \
                name[nr_cpus]
#define BPF_PERCPU(name, cpu) name[(cpu)].v
 
 
#endif
 
#endif