LineageOS/android_packages_modules_Connectivity
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Merge "add a test xdp program that drops all IPv4/UDP packets" am: d4bcf54678 am: 7c0b1b6149 am: 590d3026d9

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Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/1554236

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I5b5b9ef992be20fa56d497929bf387f14be44f93
This commit is contained in:
Treehugger Robot
2021-01-20 08:15:21 +00:00
committed by Automerger Merge Worker
parent 0feccef671 590d3026d9
commit 812fcb9237
1 changed files with 22 additions and 0 deletions
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22
Tethering/bpf_progs/test.c
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@@ -14,6 +14,10 @@
* limitations under the License.
*/
#include <linux/if_ether.h>
#include <linux/in.h>
#include <linux/ip.h>
#include "bpf_helpers.h"
#include "bpf_net_helpers.h"
#include "netdbpf/bpf_shared.h"
@@ -22,4 +26,22 @@
DEFINE_BPF_MAP_GRW(tether_ingress_map, HASH, TetherIngressKey, TetherIngressValue, 16,
AID_NETWORK_STACK)
DEFINE_BPF_PROG_KVER("xdp/drop_ipv4_udp_ether", AID_ROOT, AID_ROOT,
xdp_test, KVER(5, 9, 0))
(struct xdp_md *ctx) {
void *data = (void *)(long)ctx->data;
void *data_end = (void *)(long)ctx->data_end;
struct ethhdr *eth = data;
int hsize = sizeof(*eth);
struct iphdr *ip = data + hsize;
hsize += sizeof(struct iphdr);
if (data + hsize > data_end) return XDP_PASS;
if (eth->h_proto != htons(ETH_P_IP)) return XDP_PASS;
if (ip->protocol == IPPROTO_UDP) return XDP_DROP;
return XDP_PASS;
}
LICENSE("Apache 2.0");