diff options
Diffstat (limited to 'samples/bpf/tcbpf2_kern.c')
| -rw-r--r-- | samples/bpf/tcbpf2_kern.c | 63 |
1 files changed, 62 insertions, 1 deletions
diff --git a/samples/bpf/tcbpf2_kern.c b/samples/bpf/tcbpf2_kern.c index 270edcc149a1..370b749f5ee6 100644 --- a/samples/bpf/tcbpf2_kern.c +++ b/samples/bpf/tcbpf2_kern.c @@ -17,6 +17,7 @@ #include <uapi/linux/pkt_cls.h> #include <net/ipv6.h> #include "bpf_helpers.h" +#include "bpf_endian.h" #define _htonl __builtin_bswap32 #define ERROR(ret) do {\ @@ -38,6 +39,10 @@ struct vxlan_metadata { u32 gbp; }; +struct erspan_metadata { + __be32 index; +}; + SEC("gre_set_tunnel") int _gre_set_tunnel(struct __sk_buff *skb) { @@ -76,6 +81,63 @@ int _gre_get_tunnel(struct __sk_buff *skb) return TC_ACT_OK; } +SEC("erspan_set_tunnel") +int _erspan_set_tunnel(struct __sk_buff *skb) +{ + struct bpf_tunnel_key key; + struct erspan_metadata md; + int ret; + + __builtin_memset(&key, 0x0, sizeof(key)); + key.remote_ipv4 = 0xac100164; /* 172.16.1.100 */ + key.tunnel_id = 2; + key.tunnel_tos = 0; + key.tunnel_ttl = 64; + + ret = bpf_skb_set_tunnel_key(skb, &key, sizeof(key), BPF_F_ZERO_CSUM_TX); + if (ret < 0) { + ERROR(ret); + return TC_ACT_SHOT; + } + + md.index = htonl(123); + ret = bpf_skb_set_tunnel_opt(skb, &md, sizeof(md)); + if (ret < 0) { + ERROR(ret); + return TC_ACT_SHOT; + } + + return TC_ACT_OK; +} + +SEC("erspan_get_tunnel") +int _erspan_get_tunnel(struct __sk_buff *skb) +{ + char fmt[] = "key %d remote ip 0x%x erspan index 0x%x\n"; + struct bpf_tunnel_key key; + struct erspan_metadata md; + u32 index; + int ret; + + ret = bpf_skb_get_tunnel_key(skb, &key, sizeof(key), 0); + if (ret < 0) { + ERROR(ret); + return TC_ACT_SHOT; + } + + ret = bpf_skb_get_tunnel_opt(skb, &md, sizeof(md)); + if (ret < 0) { + ERROR(ret); + return TC_ACT_SHOT; + } + + index = bpf_ntohl(md.index); + bpf_trace_printk(fmt, sizeof(fmt), + key.tunnel_id, key.remote_ipv4, index); + + return TC_ACT_OK; +} + SEC("vxlan_set_tunnel") int _vxlan_set_tunnel(struct __sk_buff *skb) { @@ -378,5 +440,4 @@ int _ip6ip6_get_tunnel(struct __sk_buff *skb) return TC_ACT_OK; } - char _license[] SEC("license") = "GPL"; |