samples/bpf/tcp_cong_kern.c

25 int bpf_cong(struct bpf_sock_ops *skops)
34 	if (bpf_ntohl(skops->remote_port) != 55601 &&
35 	    skops->local_port != 55601) {
36 		skops->reply = -1;
40 	op = (int) skops->op;
50 	if (skops->family == AF_INET6 &&
51 	    skops->local_ip6[0] == skops->remote_ip6[0] &&
52 	    (bpf_ntohl(skops->local_ip6[1]) & 0xfff00000) ==
53 	    (bpf_ntohl(skops->remote_ip6[1]) & 0xfff00000)) {
59 			rv = bpf_setsockopt(skops, SOL_TCP, TCP_CONGESTION,
63 			rv = bpf_setsockopt(skops, SOL_TCP, TCP_CONGESTION,
75 	skops->reply = rv;