1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright (c) 2026 Meta Platforms, Inc. and affiliates. */ 3 4 #include <sys/types.h> 5 #include <sys/socket.h> 6 #include <net/if.h> 7 8 #include "test_progs.h" 9 #include "network_helpers.h" 10 #include "test_dst_clear.skel.h" 11 12 #define IPV4_IFACE_ADDR "1.0.0.1" 13 #define UDP_TEST_PORT 7777 14 15 void test_ns_dst_clear(void) 16 { 17 LIBBPF_OPTS(bpf_tcx_opts, tcx_opts); 18 struct test_dst_clear *skel; 19 struct sockaddr_in addr; 20 struct bpf_link *link; 21 socklen_t addrlen; 22 char buf[128] = {}; 23 int sockfd, err; 24 25 skel = test_dst_clear__open_and_load(); 26 if (!ASSERT_OK_PTR(skel, "skel open_and_load")) 27 return; 28 29 SYS(fail, "ip addr add %s/8 dev lo", IPV4_IFACE_ADDR); 30 31 link = bpf_program__attach_tcx(skel->progs.dst_clear, 32 if_nametoindex("lo"), &tcx_opts); 33 if (!ASSERT_OK_PTR(link, "attach_tcx")) 34 goto fail; 35 skel->links.dst_clear = link; 36 37 addrlen = sizeof(addr); 38 err = make_sockaddr(AF_INET, IPV4_IFACE_ADDR, UDP_TEST_PORT, 39 (void *)&addr, &addrlen); 40 if (!ASSERT_OK(err, "make_sockaddr")) 41 goto fail; 42 sockfd = socket(AF_INET, SOCK_DGRAM, 0); 43 if (!ASSERT_NEQ(sockfd, -1, "socket")) 44 goto fail; 45 err = sendto(sockfd, buf, sizeof(buf), 0, (void *)&addr, addrlen); 46 close(sockfd); 47 if (!ASSERT_EQ(err, sizeof(buf), "send")) 48 goto fail; 49 50 ASSERT_TRUE(skel->bss->had_dst, "had_dst"); 51 ASSERT_TRUE(skel->bss->dst_cleared, "dst_cleared"); 52 53 fail: 54 test_dst_clear__destroy(skel); 55 } 56