LineageOS/android_packages_modules_Connectivity
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Merge "add a test xdp program that drops all IPv4/UDP packets" am: d4bcf54678

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

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I06212ffe6ba8c8e95fe880d2ba48d42109836ac1
This commit is contained in:
Treehugger Robot
2021-01-20 07:28:35 +00:00
committed by Automerger Merge Worker
parent 6258dc0071 d4bcf54678
commit 7c0b1b6149
1 changed files with 22 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

22
Tethering/bpf_progs/test.c
View File

@@ -14,6 +14,10 @@
* limitations under the License. * limitations under the License.
*/ */
#include <linux/if_ether.h>
#include <linux/in.h>
#include <linux/ip.h>
#include "bpf_helpers.h" #include "bpf_helpers.h"
#include "bpf_net_helpers.h" #include "bpf_net_helpers.h"
#include "netdbpf/bpf_shared.h" #include "netdbpf/bpf_shared.h"
@@ -22,4 +26,22 @@
DEFINE_BPF_MAP_GRW(tether_ingress_map, HASH, TetherIngressKey, TetherIngressValue, 16, DEFINE_BPF_MAP_GRW(tether_ingress_map, HASH, TetherIngressKey, TetherIngressValue, 16,
AID_NETWORK_STACK) 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"); LICENSE("Apache 2.0");