diff options
| author | Dmitry Yakunin <zeil@yandex-team.ru> | 2020-08-03 12:05:44 +0300 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2020-08-04 00:31:59 +0300 |
| commit | fa5cb548ced61b9d3095f32f8a7e427a248c65ee (patch) | |
| tree | 04e21e7068cb009498667e619e213bb90ebea164 /net/bpf | |
| parent | cfa3eb65a7d6da5664d4c9275fbb568a2446d6d9 (diff) | |
| download | linux-fa5cb548ced61b9d3095f32f8a7e427a248c65ee.tar.xz | |
bpf: Setup socket family and addresses in bpf_prog_test_run_skb
Now it's impossible to test all branches of cgroup_skb bpf program which
accesses skb->family and skb->{local,remote}_ip{4,6} fields because they
are zeroed during socket allocation. This commit fills socket family and
addresses from related fields in constructed skb.
Signed-off-by: Dmitry Yakunin <zeil@yandex-team.ru>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20200803090545.82046-2-zeil@yandex-team.ru
Diffstat (limited to 'net/bpf')
| -rw-r--r-- | net/bpf/test_run.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/net/bpf/test_run.c b/net/bpf/test_run.c index b03c469cd01f..736a5964fa95 100644 --- a/net/bpf/test_run.c +++ b/net/bpf/test_run.c @@ -449,6 +449,27 @@ int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr, skb->protocol = eth_type_trans(skb, current->nsproxy->net_ns->loopback_dev); skb_reset_network_header(skb); + switch (skb->protocol) { + case htons(ETH_P_IP): + sk->sk_family = AF_INET; + if (sizeof(struct iphdr) <= skb_headlen(skb)) { + sk->sk_rcv_saddr = ip_hdr(skb)->saddr; + sk->sk_daddr = ip_hdr(skb)->daddr; + } + break; +#if IS_ENABLED(CONFIG_IPV6) + case htons(ETH_P_IPV6): + sk->sk_family = AF_INET6; + if (sizeof(struct ipv6hdr) <= skb_headlen(skb)) { + sk->sk_v6_rcv_saddr = ipv6_hdr(skb)->saddr; + sk->sk_v6_daddr = ipv6_hdr(skb)->daddr; + } + break; +#endif + default: + break; + } + if (is_l2) __skb_push(skb, hh_len); if (is_direct_pkt_access) |