+ /* Load 2nd xdp prog on egress. */
+ if (xdp_devmap_attached) {
+ unsigned char mac_addr[6];
+
+ devmap_prog = bpf_object__find_program_by_name(obj, "xdp_redirect_map_egress");
+ if (!devmap_prog) {
+ printf("finding devmap_prog in obj file failed\n");
+ goto out;
+ }
+ devmap_prog_fd = bpf_program__fd(devmap_prog);
+ if (devmap_prog_fd < 0) {
+ printf("finding devmap_prog fd failed\n");
+ goto out;
+ }
+
+ if (get_mac_addr(ifindex_out, mac_addr) < 0) {
+ printf("get interface %d mac failed\n", ifindex_out);
+ goto out;
+ }
+
+ ret = bpf_map_update_elem(tx_mac_map_fd, &key, mac_addr, 0);
+ if (ret) {
+ perror("bpf_update_elem tx_mac_map_fd");
+ goto out;
+ }
+ }
+