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// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2020 Facebook */
#include "vmlinux.h"
#include <bpf/bpf_helpers.h>
#include <bpf/bpf_tracing.h>
char _license[] SEC("license") = "GPL";
extern bool CONFIG_IPV6_SUBTREES __kconfig __weak;
#define RTF_GATEWAY 0x0002
#define IFNAMSIZ 16
#define fib_nh_gw_family nh_common.nhc_gw_family
#define fib_nh_gw6 nh_common.nhc_gw.ipv6
#define fib_nh_dev nh_common.nhc_dev
SEC("iter/ipv6_route")
int dump_ipv6_route(struct bpf_iter__ipv6_route *ctx)
{
struct seq_file *seq = ctx->meta->seq;
struct fib6_info *rt = ctx->rt;
const struct net_device *dev;
struct fib6_nh *fib6_nh;
unsigned int flags;
struct nexthop *nh;
if (rt == (void *)0)
return 0;
fib6_nh = &rt->fib6_nh[0];
flags = rt->fib6_flags;
/* FIXME: nexthop_is_multipath is not handled here. */
nh = rt->nh;
if (rt->nh)
fib6_nh = &nh->nh_info->fib6_nh;
BPF_SEQ_PRINTF(seq, "%pi6 %02x ", &rt->fib6_dst.addr, rt->fib6_dst.plen);
if (CONFIG_IPV6_SUBTREES)
BPF_SEQ_PRINTF(seq, "%pi6 %02x ", &rt->fib6_src.addr,
rt->fib6_src.plen);
else
BPF_SEQ_PRINTF(seq, "00000000000000000000000000000000 00 ");
if (fib6_nh->fib_nh_gw_family) {
flags |= RTF_GATEWAY;
BPF_SEQ_PRINTF(seq, "%pi6 ", &fib6_nh->fib_nh_gw6);
} else {
BPF_SEQ_PRINTF(seq, "00000000000000000000000000000000 ");
}
dev = fib6_nh->fib_nh_dev;
if (dev)
BPF_SEQ_PRINTF(seq, "%08x %08x %08x %08x %8s\n", rt->fib6_metric,
rt->fib6_ref.refs.counter, 0, flags, dev->name);
else
BPF_SEQ_PRINTF(seq, "%08x %08x %08x %08x\n", rt->fib6_metric,
rt->fib6_ref.refs.counter, 0, flags);
return 0;
}
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