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Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards

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orangepi/linux-orangepi-5.10.y.git/trunk/tools/testing/selftests/bpf/prog_tests/sk_lookup.c
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// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
// Copyright (c) 2020 Cloudflare
/*
 * Test BPF attach point for INET socket lookup (BPF_SK_LOOKUP).
 *
 * Tests exercise:
 *  - attaching/detaching/querying programs to BPF_SK_LOOKUP hook,
 *  - redirecting socket lookup to a socket selected by BPF program,
 *  - failing a socket lookup on BPF program's request,
 *  - error scenarios for selecting a socket from BPF program,
 *  - accessing BPF program context,
 *  - attaching and running multiple BPF programs.
 *
 * Tests run in a dedicated network namespace.
 */
 
#define _GNU_SOURCE
#include <arpa/inet.h>
#include <assert.h>
#include <errno.h>
#include <error.h>
#include <fcntl.h>
#include <sched.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
 
#include <bpf/libbpf.h>
#include <bpf/bpf.h>
 
#include "test_progs.h"
#include "bpf_rlimit.h"
#include "bpf_util.h"
#include "cgroup_helpers.h"
#include "network_helpers.h"
#include "testing_helpers.h"
#include "test_sk_lookup.skel.h"
 
/* External (address, port) pairs the client sends packets to. */
#define EXT_IP4		"127.0.0.1"
#define EXT_IP6		"fd00::1"
#define EXT_PORT	7007
 
/* Internal (address, port) pairs the server listens/receives at. */
#define INT_IP4		"127.0.0.2"
#define INT_IP4_V6	"::ffff:127.0.0.2"
#define INT_IP6		"fd00::2"
#define INT_PORT	8008
 
#define IO_TIMEOUT_SEC	3
 
enum server {
<------>SERVER_A = 0,
<------>SERVER_B = 1,
<------>MAX_SERVERS,
};
 
enum {
<------>PROG1 = 0,
<------>PROG2,
};
 
struct inet_addr {
<------>const char *ip;
<------>unsigned short port;
};
 
struct test {
<------>const char *desc;
<------>struct bpf_program *lookup_prog;
<------>struct bpf_program *reuseport_prog;
<------>struct bpf_map *sock_map;
<------>int sotype;
<------>struct inet_addr connect_to;
<------>struct inet_addr listen_at;
<------>enum server accept_on;
<------>bool reuseport_has_conns; /* Add a connected socket to reuseport group */
};
 
static __u32 duration;		/* for CHECK macro */
 
static bool is_ipv6(const char *ip)
{
<------>return !!strchr(ip, ':');
}
 
static int attach_reuseport(int sock_fd, struct bpf_program *reuseport_prog)
{
<------>int err, prog_fd;
 
<------>prog_fd = bpf_program__fd(reuseport_prog);
<------>if (prog_fd < 0) {
<------><------>errno = -prog_fd;
<------><------>return -1;
<------>}
 
<------>err = setsockopt(sock_fd, SOL_SOCKET, SO_ATTACH_REUSEPORT_EBPF,
<------><------><------> &prog_fd, sizeof(prog_fd));
<------>if (err)
<------><------>return -1;
 
<------>return 0;
}
 
static socklen_t inetaddr_len(const struct sockaddr_storage *addr)
{
<------>return (addr->ss_family == AF_INET ? sizeof(struct sockaddr_in) :
<------><------>addr->ss_family == AF_INET6 ? sizeof(struct sockaddr_in6) : 0);
}
 
static int make_socket(int sotype, const char *ip, int port,
<------><------>       struct sockaddr_storage *addr)
{
<------>struct timeval timeo = { .tv_sec = IO_TIMEOUT_SEC };
<------>int err, family, fd;
 
<------>family = is_ipv6(ip) ? AF_INET6 : AF_INET;
<------>err = make_sockaddr(family, ip, port, addr, NULL);
<------>if (CHECK(err, "make_address", "failed\n"))
<------><------>return -1;
 
<------>fd = socket(addr->ss_family, sotype, 0);
<------>if (CHECK(fd < 0, "socket", "failed\n")) {
<------><------>log_err("failed to make socket");
<------><------>return -1;
<------>}
 
<------>err = setsockopt(fd, SOL_SOCKET, SO_SNDTIMEO, &timeo, sizeof(timeo));
<------>if (CHECK(err, "setsockopt(SO_SNDTIMEO)", "failed\n")) {
<------><------>log_err("failed to set SNDTIMEO");
<------><------>close(fd);
<------><------>return -1;
<------>}
 
<------>err = setsockopt(fd, SOL_SOCKET, SO_RCVTIMEO, &timeo, sizeof(timeo));
<------>if (CHECK(err, "setsockopt(SO_RCVTIMEO)", "failed\n")) {
<------><------>log_err("failed to set RCVTIMEO");
<------><------>close(fd);
<------><------>return -1;
<------>}
 
<------>return fd;
}
 
static int make_server(int sotype, const char *ip, int port,
<------><------>       struct bpf_program *reuseport_prog)
{
<------>struct sockaddr_storage addr = {0};
<------>const int one = 1;
<------>int err, fd = -1;
 
<------>fd = make_socket(sotype, ip, port, &addr);
<------>if (fd < 0)
<------><------>return -1;
 
<------>/* Enabled for UDPv6 sockets for IPv4-mapped IPv6 to work. */
<------>if (sotype == SOCK_DGRAM) {
<------><------>err = setsockopt(fd, SOL_IP, IP_RECVORIGDSTADDR, &one,
<------><------><------><------> sizeof(one));
<------><------>if (CHECK(err, "setsockopt(IP_RECVORIGDSTADDR)", "failed\n")) {
<------><------><------>log_err("failed to enable IP_RECVORIGDSTADDR");
<------><------><------>goto fail;
<------><------>}
<------>}
 
<------>if (sotype == SOCK_DGRAM && addr.ss_family == AF_INET6) {
<------><------>err = setsockopt(fd, SOL_IPV6, IPV6_RECVORIGDSTADDR, &one,
<------><------><------><------> sizeof(one));
<------><------>if (CHECK(err, "setsockopt(IPV6_RECVORIGDSTADDR)", "failed\n")) {
<------><------><------>log_err("failed to enable IPV6_RECVORIGDSTADDR");
<------><------><------>goto fail;
<------><------>}
<------>}
 
<------>if (sotype == SOCK_STREAM) {
<------><------>err = setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one,
<------><------><------><------> sizeof(one));
<------><------>if (CHECK(err, "setsockopt(SO_REUSEADDR)", "failed\n")) {
<------><------><------>log_err("failed to enable SO_REUSEADDR");
<------><------><------>goto fail;
<------><------>}
<------>}
 
<------>if (reuseport_prog) {
<------><------>err = setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &one,
<------><------><------><------> sizeof(one));
<------><------>if (CHECK(err, "setsockopt(SO_REUSEPORT)", "failed\n")) {
<------><------><------>log_err("failed to enable SO_REUSEPORT");
<------><------><------>goto fail;
<------><------>}
<------>}
 
<------>err = bind(fd, (void *)&addr, inetaddr_len(&addr));
<------>if (CHECK(err, "bind", "failed\n")) {
<------><------>log_err("failed to bind listen socket");
<------><------>goto fail;
<------>}
 
<------>if (sotype == SOCK_STREAM) {
<------><------>err = listen(fd, SOMAXCONN);
<------><------>if (CHECK(err, "make_server", "listen")) {
<------><------><------>log_err("failed to listen on port %d", port);
<------><------><------>goto fail;
<------><------>}
<------>}
 
<------>/* Late attach reuseport prog so we can have one init path */
<------>if (reuseport_prog) {
<------><------>err = attach_reuseport(fd, reuseport_prog);
<------><------>if (CHECK(err, "attach_reuseport", "failed\n")) {
<------><------><------>log_err("failed to attach reuseport prog");
<------><------><------>goto fail;
<------><------>}
<------>}
 
<------>return fd;
fail:
<------>close(fd);
<------>return -1;
}
 
static int make_client(int sotype, const char *ip, int port)
{
<------>struct sockaddr_storage addr = {0};
<------>int err, fd;
 
<------>fd = make_socket(sotype, ip, port, &addr);
<------>if (fd < 0)
<------><------>return -1;
 
<------>err = connect(fd, (void *)&addr, inetaddr_len(&addr));
<------>if (CHECK(err, "make_client", "connect")) {
<------><------>log_err("failed to connect client socket");
<------><------>goto fail;
<------>}
 
<------>return fd;
fail:
<------>close(fd);
<------>return -1;
}
 
static __u64 socket_cookie(int fd)
{
<------>__u64 cookie;
<------>socklen_t cookie_len = sizeof(cookie);
 
<------>if (CHECK(getsockopt(fd, SOL_SOCKET, SO_COOKIE, &cookie, &cookie_len) < 0,
<------><------>  "getsockopt(SO_COOKIE)", "%s\n", strerror(errno)))
<------><------>return 0;
<------>return cookie;
}
 
static int fill_sk_lookup_ctx(struct bpf_sk_lookup *ctx, const char *local_ip, __u16 local_port,
<------><------><------>      const char *remote_ip, __u16 remote_port)
{
<------>void *local, *remote;
<------>int err;
 
<------>memset(ctx, 0, sizeof(*ctx));
<------>ctx->local_port = local_port;
<------>ctx->remote_port = htons(remote_port);
 
<------>if (is_ipv6(local_ip)) {
<------><------>ctx->family = AF_INET6;
<------><------>local = &ctx->local_ip6[0];
<------><------>remote = &ctx->remote_ip6[0];
<------>} else {
<------><------>ctx->family = AF_INET;
<------><------>local = &ctx->local_ip4;
<------><------>remote = &ctx->remote_ip4;
<------>}
 
<------>err = inet_pton(ctx->family, local_ip, local);
<------>if (CHECK(err != 1, "inet_pton", "local_ip failed\n"))
<------><------>return 1;
 
<------>err = inet_pton(ctx->family, remote_ip, remote);
<------>if (CHECK(err != 1, "inet_pton", "remote_ip failed\n"))
<------><------>return 1;
 
<------>return 0;
}
 
static int send_byte(int fd)
{
<------>ssize_t n;
 
<------>errno = 0;
<------>n = send(fd, "a", 1, 0);
<------>if (CHECK(n <= 0, "send_byte", "send")) {
<------><------>log_err("failed/partial send");
<------><------>return -1;
<------>}
<------>return 0;
}
 
static int recv_byte(int fd)
{
<------>char buf[1];
<------>ssize_t n;
 
<------>n = recv(fd, buf, sizeof(buf), 0);
<------>if (CHECK(n <= 0, "recv_byte", "recv")) {
<------><------>log_err("failed/partial recv");
<------><------>return -1;
<------>}
<------>return 0;
}
 
static int tcp_recv_send(int server_fd)
{
<------>char buf[1];
<------>int ret, fd;
<------>ssize_t n;
 
<------>fd = accept(server_fd, NULL, NULL);
<------>if (CHECK(fd < 0, "accept", "failed\n")) {
<------><------>log_err("failed to accept");
<------><------>return -1;
<------>}
 
<------>n = recv(fd, buf, sizeof(buf), 0);
<------>if (CHECK(n <= 0, "recv", "failed\n")) {
<------><------>log_err("failed/partial recv");
<------><------>ret = -1;
<------><------>goto close;
<------>}
 
<------>n = send(fd, buf, n, 0);
<------>if (CHECK(n <= 0, "send", "failed\n")) {
<------><------>log_err("failed/partial send");
<------><------>ret = -1;
<------><------>goto close;
<------>}
 
<------>ret = 0;
close:
<------>close(fd);
<------>return ret;
}
 
static void v4_to_v6(struct sockaddr_storage *ss)
{
<------>struct sockaddr_in6 *v6 = (struct sockaddr_in6 *)ss;
<------>struct sockaddr_in v4 = *(struct sockaddr_in *)ss;
 
<------>v6->sin6_family = AF_INET6;
<------>v6->sin6_port = v4.sin_port;
<------>v6->sin6_addr.s6_addr[10] = 0xff;
<------>v6->sin6_addr.s6_addr[11] = 0xff;
<------>memcpy(&v6->sin6_addr.s6_addr[12], &v4.sin_addr.s_addr, 4);
<------>memset(&v6->sin6_addr.s6_addr[0], 0, 10);
}
 
static int udp_recv_send(int server_fd)
{
<------>char cmsg_buf[CMSG_SPACE(sizeof(struct sockaddr_storage))];
<------>struct sockaddr_storage _src_addr = { 0 };
<------>struct sockaddr_storage *src_addr = &_src_addr;
<------>struct sockaddr_storage *dst_addr = NULL;
<------>struct msghdr msg = { 0 };
<------>struct iovec iov = { 0 };
<------>struct cmsghdr *cm;
<------>char buf[1];
<------>int ret, fd;
<------>ssize_t n;
 
<------>iov.iov_base = buf;
<------>iov.iov_len = sizeof(buf);
 
<------>msg.msg_name = src_addr;
<------>msg.msg_namelen = sizeof(*src_addr);
<------>msg.msg_iov = &iov;
<------>msg.msg_iovlen = 1;
<------>msg.msg_control = cmsg_buf;
<------>msg.msg_controllen = sizeof(cmsg_buf);
 
<------>errno = 0;
<------>n = recvmsg(server_fd, &msg, 0);
<------>if (CHECK(n <= 0, "recvmsg", "failed\n")) {
<------><------>log_err("failed to receive");
<------><------>return -1;
<------>}
<------>if (CHECK(msg.msg_flags & MSG_CTRUNC, "recvmsg", "truncated cmsg\n"))
<------><------>return -1;
 
<------>for (cm = CMSG_FIRSTHDR(&msg); cm; cm = CMSG_NXTHDR(&msg, cm)) {
<------><------>if ((cm->cmsg_level == SOL_IP &&
<------><------>     cm->cmsg_type == IP_ORIGDSTADDR) ||
<------><------>    (cm->cmsg_level == SOL_IPV6 &&
<------><------>     cm->cmsg_type == IPV6_ORIGDSTADDR)) {
<------><------><------>dst_addr = (struct sockaddr_storage *)CMSG_DATA(cm);
<------><------><------>break;
<------><------>}
<------><------>log_err("warning: ignored cmsg at level %d type %d",
<------><------><------>cm->cmsg_level, cm->cmsg_type);
<------>}
<------>if (CHECK(!dst_addr, "recvmsg", "missing ORIGDSTADDR\n"))
<------><------>return -1;
 
<------>/* Server socket bound to IPv4-mapped IPv6 address */
<------>if (src_addr->ss_family == AF_INET6 &&
<------>    dst_addr->ss_family == AF_INET) {
<------><------>v4_to_v6(dst_addr);
<------>}
 
<------>/* Reply from original destination address. */
<------>fd = socket(dst_addr->ss_family, SOCK_DGRAM, 0);
<------>if (CHECK(fd < 0, "socket", "failed\n")) {
<------><------>log_err("failed to create tx socket");
<------><------>return -1;
<------>}
 
<------>ret = bind(fd, (struct sockaddr *)dst_addr, sizeof(*dst_addr));
<------>if (CHECK(ret, "bind", "failed\n")) {
<------><------>log_err("failed to bind tx socket");
<------><------>goto out;
<------>}
 
<------>msg.msg_control = NULL;
<------>msg.msg_controllen = 0;
<------>n = sendmsg(fd, &msg, 0);
<------>if (CHECK(n <= 0, "sendmsg", "failed\n")) {
<------><------>log_err("failed to send echo reply");
<------><------>ret = -1;
<------><------>goto out;
<------>}
 
<------>ret = 0;
out:
<------>close(fd);
<------>return ret;
}
 
static int tcp_echo_test(int client_fd, int server_fd)
{
<------>int err;
 
<------>err = send_byte(client_fd);
<------>if (err)
<------><------>return -1;
<------>err = tcp_recv_send(server_fd);
<------>if (err)
<------><------>return -1;
<------>err = recv_byte(client_fd);
<------>if (err)
<------><------>return -1;
 
<------>return 0;
}
 
static int udp_echo_test(int client_fd, int server_fd)
{
<------>int err;
 
<------>err = send_byte(client_fd);
<------>if (err)
<------><------>return -1;
<------>err = udp_recv_send(server_fd);
<------>if (err)
<------><------>return -1;
<------>err = recv_byte(client_fd);
<------>if (err)
<------><------>return -1;
 
<------>return 0;
}
 
static struct bpf_link *attach_lookup_prog(struct bpf_program *prog)
{
<------>struct bpf_link *link;
<------>int net_fd;
 
<------>net_fd = open("/proc/self/ns/net", O_RDONLY);
<------>if (CHECK(net_fd < 0, "open", "failed\n")) {
<------><------>log_err("failed to open /proc/self/ns/net");
<------><------>return NULL;
<------>}
 
<------>link = bpf_program__attach_netns(prog, net_fd);
<------>if (CHECK(IS_ERR(link), "bpf_program__attach_netns", "failed\n")) {
<------><------>errno = -PTR_ERR(link);
<------><------>log_err("failed to attach program '%s' to netns",
<------><------><------>bpf_program__name(prog));
<------><------>link = NULL;
<------>}
 
<------>close(net_fd);
<------>return link;
}
 
static int update_lookup_map(struct bpf_map *map, int index, int sock_fd)
{
<------>int err, map_fd;
<------>uint64_t value;
 
<------>map_fd = bpf_map__fd(map);
<------>if (CHECK(map_fd < 0, "bpf_map__fd", "failed\n")) {
<------><------>errno = -map_fd;
<------><------>log_err("failed to get map FD");
<------><------>return -1;
<------>}
 
<------>value = (uint64_t)sock_fd;
<------>err = bpf_map_update_elem(map_fd, &index, &value, BPF_NOEXIST);
<------>if (CHECK(err, "bpf_map_update_elem", "failed\n")) {
<------><------>log_err("failed to update redir_map @ %d", index);
<------><------>return -1;
<------>}
 
<------>return 0;
}
 
static void query_lookup_prog(struct test_sk_lookup *skel)
{
<------>struct bpf_link *link[3] = {};
<------>struct bpf_link_info info;
<------>__u32 attach_flags = 0;
<------>__u32 prog_ids[3] = {};
<------>__u32 prog_cnt = 3;
<------>__u32 prog_id;
<------>int net_fd;
<------>int err;
 
<------>net_fd = open("/proc/self/ns/net", O_RDONLY);
<------>if (CHECK(net_fd < 0, "open", "failed\n")) {
<------><------>log_err("failed to open /proc/self/ns/net");
<------><------>return;
<------>}
 
<------>link[0] = attach_lookup_prog(skel->progs.lookup_pass);
<------>if (!link[0])
<------><------>goto close;
<------>link[1] = attach_lookup_prog(skel->progs.lookup_pass);
<------>if (!link[1])
<------><------>goto detach;
<------>link[2] = attach_lookup_prog(skel->progs.lookup_drop);
<------>if (!link[2])
<------><------>goto detach;
 
<------>err = bpf_prog_query(net_fd, BPF_SK_LOOKUP, 0 /* query flags */,
<------><------><------>     &attach_flags, prog_ids, &prog_cnt);
<------>if (CHECK(err, "bpf_prog_query", "failed\n")) {
<------><------>log_err("failed to query lookup prog");
<------><------>goto detach;
<------>}
 
<------>errno = 0;
<------>if (CHECK(attach_flags != 0, "bpf_prog_query",
<------><------>  "wrong attach_flags on query: %u", attach_flags))
<------><------>goto detach;
<------>if (CHECK(prog_cnt != 3, "bpf_prog_query",
<------><------>  "wrong program count on query: %u", prog_cnt))
<------><------>goto detach;
<------>prog_id = link_info_prog_id(link[0], &info);
<------>CHECK(prog_ids[0] != prog_id, "bpf_prog_query",
<------>      "invalid program #0 id on query: %u != %u\n",
<------>      prog_ids[0], prog_id);
<------>CHECK(info.netns.netns_ino == 0, "netns_ino",
<------>      "unexpected netns_ino: %u\n", info.netns.netns_ino);
<------>prog_id = link_info_prog_id(link[1], &info);
<------>CHECK(prog_ids[1] != prog_id, "bpf_prog_query",
<------>      "invalid program #1 id on query: %u != %u\n",
<------>      prog_ids[1], prog_id);
<------>CHECK(info.netns.netns_ino == 0, "netns_ino",
<------>      "unexpected netns_ino: %u\n", info.netns.netns_ino);
<------>prog_id = link_info_prog_id(link[2], &info);
<------>CHECK(prog_ids[2] != prog_id, "bpf_prog_query",
<------>      "invalid program #2 id on query: %u != %u\n",
<------>      prog_ids[2], prog_id);
<------>CHECK(info.netns.netns_ino == 0, "netns_ino",
<------>      "unexpected netns_ino: %u\n", info.netns.netns_ino);
 
<------>err = bpf_link__detach(link[0]);
<------>if (CHECK(err, "link_detach", "failed %d\n", err))
<------><------>goto detach;
 
<------>/* prog id is still there, but netns_ino is zeroed out */
<------>prog_id = link_info_prog_id(link[0], &info);
<------>CHECK(prog_ids[0] != prog_id, "bpf_prog_query",
<------>      "invalid program #0 id on query: %u != %u\n",
<------>      prog_ids[0], prog_id);
<------>CHECK(info.netns.netns_ino != 0, "netns_ino",
<------>      "unexpected netns_ino: %u\n", info.netns.netns_ino);
 
detach:
<------>if (link[2])
<------><------>bpf_link__destroy(link[2]);
<------>if (link[1])
<------><------>bpf_link__destroy(link[1]);
<------>if (link[0])
<------><------>bpf_link__destroy(link[0]);
close:
<------>close(net_fd);
}
 
static void run_lookup_prog(const struct test *t)
{
<------>int server_fds[] = { [0 ... MAX_SERVERS - 1] = -1 };
<------>int client_fd, reuse_conn_fd = -1;
<------>struct bpf_link *lookup_link;
<------>int i, err;
 
<------>lookup_link = attach_lookup_prog(t->lookup_prog);
<------>if (!lookup_link)
<------><------>return;
 
<------>for (i = 0; i < ARRAY_SIZE(server_fds); i++) {
<------><------>server_fds[i] = make_server(t->sotype, t->listen_at.ip,
<------><------><------><------><------>    t->listen_at.port,
<------><------><------><------><------>    t->reuseport_prog);
<------><------>if (server_fds[i] < 0)
<------><------><------>goto close;
 
<------><------>err = update_lookup_map(t->sock_map, i, server_fds[i]);
<------><------>if (err)
<------><------><------>goto close;
 
<------><------>/* want just one server for non-reuseport test */
<------><------>if (!t->reuseport_prog)
<------><------><------>break;
<------>}
 
<------>/* Regular UDP socket lookup with reuseport behaves
<------> * differently when reuseport group contains connected
<------> * sockets. Check that adding a connected UDP socket to the
<------> * reuseport group does not affect how reuseport works with
<------> * BPF socket lookup.
<------> */
<------>if (t->reuseport_has_conns) {
<------><------>struct sockaddr_storage addr = {};
<------><------>socklen_t len = sizeof(addr);
 
<------><------>/* Add an extra socket to reuseport group */
<------><------>reuse_conn_fd = make_server(t->sotype, t->listen_at.ip,
<------><------><------><------><------>    t->listen_at.port,
<------><------><------><------><------>    t->reuseport_prog);
<------><------>if (reuse_conn_fd < 0)
<------><------><------>goto close;
 
<------><------>/* Connect the extra socket to itself */
<------><------>err = getsockname(reuse_conn_fd, (void *)&addr, &len);
<------><------>if (CHECK(err, "getsockname", "errno %d\n", errno))
<------><------><------>goto close;
<------><------>err = connect(reuse_conn_fd, (void *)&addr, len);
<------><------>if (CHECK(err, "connect", "errno %d\n", errno))
<------><------><------>goto close;
<------>}
 
<------>client_fd = make_client(t->sotype, t->connect_to.ip, t->connect_to.port);
<------>if (client_fd < 0)
<------><------>goto close;
 
<------>if (t->sotype == SOCK_STREAM)
<------><------>tcp_echo_test(client_fd, server_fds[t->accept_on]);
<------>else
<------><------>udp_echo_test(client_fd, server_fds[t->accept_on]);
 
<------>close(client_fd);
close:
<------>if (reuse_conn_fd != -1)
<------><------>close(reuse_conn_fd);
<------>for (i = 0; i < ARRAY_SIZE(server_fds); i++) {
<------><------>if (server_fds[i] != -1)
<------><------><------>close(server_fds[i]);
<------>}
<------>bpf_link__destroy(lookup_link);
}
 
static void test_redirect_lookup(struct test_sk_lookup *skel)
{
<------>const struct test tests[] = {
<------><------>{
<------><------><------>.desc		= "TCP IPv4 redir port",
<------><------><------>.lookup_prog	= skel->progs.redir_port,
<------><------><------>.sock_map	= skel->maps.redir_map,
<------><------><------>.sotype		= SOCK_STREAM,
<------><------><------>.connect_to	= { EXT_IP4, EXT_PORT },
<------><------><------>.listen_at	= { EXT_IP4, INT_PORT },
<------><------>},
<------><------>{
<------><------><------>.desc		= "TCP IPv4 redir addr",
<------><------><------>.lookup_prog	= skel->progs.redir_ip4,
<------><------><------>.sock_map	= skel->maps.redir_map,
<------><------><------>.sotype		= SOCK_STREAM,
<------><------><------>.connect_to	= { EXT_IP4, EXT_PORT },
<------><------><------>.listen_at	= { INT_IP4, EXT_PORT },
<------><------>},
<------><------>{
<------><------><------>.desc		= "TCP IPv4 redir with reuseport",
<------><------><------>.lookup_prog	= skel->progs.select_sock_a,
<------><------><------>.reuseport_prog	= skel->progs.select_sock_b,
<------><------><------>.sock_map	= skel->maps.redir_map,
<------><------><------>.sotype		= SOCK_STREAM,
<------><------><------>.connect_to	= { EXT_IP4, EXT_PORT },
<------><------><------>.listen_at	= { INT_IP4, INT_PORT },
<------><------><------>.accept_on	= SERVER_B,
<------><------>},
<------><------>{
<------><------><------>.desc		= "TCP IPv4 redir skip reuseport",
<------><------><------>.lookup_prog	= skel->progs.select_sock_a_no_reuseport,
<------><------><------>.reuseport_prog	= skel->progs.select_sock_b,
<------><------><------>.sock_map	= skel->maps.redir_map,
<------><------><------>.sotype		= SOCK_STREAM,
<------><------><------>.connect_to	= { EXT_IP4, EXT_PORT },
<------><------><------>.listen_at	= { INT_IP4, INT_PORT },
<------><------><------>.accept_on	= SERVER_A,
<------><------>},
<------><------>{
<------><------><------>.desc		= "TCP IPv6 redir port",
<------><------><------>.lookup_prog	= skel->progs.redir_port,
<------><------><------>.sock_map	= skel->maps.redir_map,
<------><------><------>.sotype		= SOCK_STREAM,
<------><------><------>.connect_to	= { EXT_IP6, EXT_PORT },
<------><------><------>.listen_at	= { EXT_IP6, INT_PORT },
<------><------>},
<------><------>{
<------><------><------>.desc		= "TCP IPv6 redir addr",
<------><------><------>.lookup_prog	= skel->progs.redir_ip6,
<------><------><------>.sock_map	= skel->maps.redir_map,
<------><------><------>.sotype		= SOCK_STREAM,
<------><------><------>.connect_to	= { EXT_IP6, EXT_PORT },
<------><------><------>.listen_at	= { INT_IP6, EXT_PORT },
<------><------>},
<------><------>{
<------><------><------>.desc		= "TCP IPv4->IPv6 redir port",
<------><------><------>.lookup_prog	= skel->progs.redir_port,
<------><------><------>.sock_map	= skel->maps.redir_map,
<------><------><------>.sotype		= SOCK_STREAM,
<------><------><------>.connect_to	= { EXT_IP4, EXT_PORT },
<------><------><------>.listen_at	= { INT_IP4_V6, INT_PORT },
<------><------>},
<------><------>{
<------><------><------>.desc		= "TCP IPv6 redir with reuseport",
<------><------><------>.lookup_prog	= skel->progs.select_sock_a,
<------><------><------>.reuseport_prog	= skel->progs.select_sock_b,
<------><------><------>.sock_map	= skel->maps.redir_map,
<------><------><------>.sotype		= SOCK_STREAM,
<------><------><------>.connect_to	= { EXT_IP6, EXT_PORT },
<------><------><------>.listen_at	= { INT_IP6, INT_PORT },
<------><------><------>.accept_on	= SERVER_B,
<------><------>},
<------><------>{
<------><------><------>.desc		= "TCP IPv6 redir skip reuseport",
<------><------><------>.lookup_prog	= skel->progs.select_sock_a_no_reuseport,
<------><------><------>.reuseport_prog	= skel->progs.select_sock_b,
<------><------><------>.sock_map	= skel->maps.redir_map,
<------><------><------>.sotype		= SOCK_STREAM,
<------><------><------>.connect_to	= { EXT_IP6, EXT_PORT },
<------><------><------>.listen_at	= { INT_IP6, INT_PORT },
<------><------><------>.accept_on	= SERVER_A,
<------><------>},
<------><------>{
<------><------><------>.desc		= "UDP IPv4 redir port",
<------><------><------>.lookup_prog	= skel->progs.redir_port,
<------><------><------>.sock_map	= skel->maps.redir_map,
<------><------><------>.sotype		= SOCK_DGRAM,
<------><------><------>.connect_to	= { EXT_IP4, EXT_PORT },
<------><------><------>.listen_at	= { EXT_IP4, INT_PORT },
<------><------>},
<------><------>{
<------><------><------>.desc		= "UDP IPv4 redir addr",
<------><------><------>.lookup_prog	= skel->progs.redir_ip4,
<------><------><------>.sock_map	= skel->maps.redir_map,
<------><------><------>.sotype		= SOCK_DGRAM,
<------><------><------>.connect_to	= { EXT_IP4, EXT_PORT },
<------><------><------>.listen_at	= { INT_IP4, EXT_PORT },
<------><------>},
<------><------>{
<------><------><------>.desc		= "UDP IPv4 redir with reuseport",
<------><------><------>.lookup_prog	= skel->progs.select_sock_a,
<------><------><------>.reuseport_prog	= skel->progs.select_sock_b,
<------><------><------>.sock_map	= skel->maps.redir_map,
<------><------><------>.sotype		= SOCK_DGRAM,
<------><------><------>.connect_to	= { EXT_IP4, EXT_PORT },
<------><------><------>.listen_at	= { INT_IP4, INT_PORT },
<------><------><------>.accept_on	= SERVER_B,
<------><------>},
<------><------>{
<------><------><------>.desc		= "UDP IPv4 redir and reuseport with conns",
<------><------><------>.lookup_prog	= skel->progs.select_sock_a,
<------><------><------>.reuseport_prog	= skel->progs.select_sock_b,
<------><------><------>.sock_map	= skel->maps.redir_map,
<------><------><------>.sotype		= SOCK_DGRAM,
<------><------><------>.connect_to	= { EXT_IP4, EXT_PORT },
<------><------><------>.listen_at	= { INT_IP4, INT_PORT },
<------><------><------>.accept_on	= SERVER_B,
<------><------><------>.reuseport_has_conns = true,
<------><------>},
<------><------>{
<------><------><------>.desc		= "UDP IPv4 redir skip reuseport",
<------><------><------>.lookup_prog	= skel->progs.select_sock_a_no_reuseport,
<------><------><------>.reuseport_prog	= skel->progs.select_sock_b,
<------><------><------>.sock_map	= skel->maps.redir_map,
<------><------><------>.sotype		= SOCK_DGRAM,
<------><------><------>.connect_to	= { EXT_IP4, EXT_PORT },
<------><------><------>.listen_at	= { INT_IP4, INT_PORT },
<------><------><------>.accept_on	= SERVER_A,
<------><------>},
<------><------>{
<------><------><------>.desc		= "UDP IPv6 redir port",
<------><------><------>.lookup_prog	= skel->progs.redir_port,
<------><------><------>.sock_map	= skel->maps.redir_map,
<------><------><------>.sotype		= SOCK_DGRAM,
<------><------><------>.connect_to	= { EXT_IP6, EXT_PORT },
<------><------><------>.listen_at	= { EXT_IP6, INT_PORT },
<------><------>},
<------><------>{
<------><------><------>.desc		= "UDP IPv6 redir addr",
<------><------><------>.lookup_prog	= skel->progs.redir_ip6,
<------><------><------>.sock_map	= skel->maps.redir_map,
<------><------><------>.sotype		= SOCK_DGRAM,
<------><------><------>.connect_to	= { EXT_IP6, EXT_PORT },
<------><------><------>.listen_at	= { INT_IP6, EXT_PORT },
<------><------>},
<------><------>{
<------><------><------>.desc		= "UDP IPv4->IPv6 redir port",
<------><------><------>.lookup_prog	= skel->progs.redir_port,
<------><------><------>.sock_map	= skel->maps.redir_map,
<------><------><------>.sotype		= SOCK_DGRAM,
<------><------><------>.listen_at	= { INT_IP4_V6, INT_PORT },
<------><------><------>.connect_to	= { EXT_IP4, EXT_PORT },
<------><------>},
<------><------>{
<------><------><------>.desc		= "UDP IPv6 redir and reuseport",
<------><------><------>.lookup_prog	= skel->progs.select_sock_a,
<------><------><------>.reuseport_prog	= skel->progs.select_sock_b,
<------><------><------>.sock_map	= skel->maps.redir_map,
<------><------><------>.sotype		= SOCK_DGRAM,
<------><------><------>.connect_to	= { EXT_IP6, EXT_PORT },
<------><------><------>.listen_at	= { INT_IP6, INT_PORT },
<------><------><------>.accept_on	= SERVER_B,
<------><------>},
<------><------>{
<------><------><------>.desc		= "UDP IPv6 redir and reuseport with conns",
<------><------><------>.lookup_prog	= skel->progs.select_sock_a,
<------><------><------>.reuseport_prog	= skel->progs.select_sock_b,
<------><------><------>.sock_map	= skel->maps.redir_map,
<------><------><------>.sotype		= SOCK_DGRAM,
<------><------><------>.connect_to	= { EXT_IP6, EXT_PORT },
<------><------><------>.listen_at	= { INT_IP6, INT_PORT },
<------><------><------>.accept_on	= SERVER_B,
<------><------><------>.reuseport_has_conns = true,
<------><------>},
<------><------>{
<------><------><------>.desc		= "UDP IPv6 redir skip reuseport",
<------><------><------>.lookup_prog	= skel->progs.select_sock_a_no_reuseport,
<------><------><------>.reuseport_prog	= skel->progs.select_sock_b,
<------><------><------>.sock_map	= skel->maps.redir_map,
<------><------><------>.sotype		= SOCK_DGRAM,
<------><------><------>.connect_to	= { EXT_IP6, EXT_PORT },
<------><------><------>.listen_at	= { INT_IP6, INT_PORT },
<------><------><------>.accept_on	= SERVER_A,
<------><------>},
<------>};
<------>const struct test *t;
 
<------>for (t = tests; t < tests + ARRAY_SIZE(tests); t++) {
<------><------>if (test__start_subtest(t->desc))
<------><------><------>run_lookup_prog(t);
<------>}
}
 
static void drop_on_lookup(const struct test *t)
{
<------>struct sockaddr_storage dst = {};
<------>int client_fd, server_fd, err;
<------>struct bpf_link *lookup_link;
<------>ssize_t n;
 
<------>lookup_link = attach_lookup_prog(t->lookup_prog);
<------>if (!lookup_link)
<------><------>return;
 
<------>server_fd = make_server(t->sotype, t->listen_at.ip, t->listen_at.port,
<------><------><------><------>t->reuseport_prog);
<------>if (server_fd < 0)
<------><------>goto detach;
 
<------>client_fd = make_socket(t->sotype, t->connect_to.ip,
<------><------><------><------>t->connect_to.port, &dst);
<------>if (client_fd < 0)
<------><------>goto close_srv;
 
<------>err = connect(client_fd, (void *)&dst, inetaddr_len(&dst));
<------>if (t->sotype == SOCK_DGRAM) {
<------><------>err = send_byte(client_fd);
<------><------>if (err)
<------><------><------>goto close_all;
 
<------><------>/* Read out asynchronous error */
<------><------>n = recv(client_fd, NULL, 0, 0);
<------><------>err = n == -1;
<------>}
<------>if (CHECK(!err || errno != ECONNREFUSED, "connect",
<------><------>  "unexpected success or error\n"))
<------><------>log_err("expected ECONNREFUSED on connect");
 
close_all:
<------>close(client_fd);
close_srv:
<------>close(server_fd);
detach:
<------>bpf_link__destroy(lookup_link);
}
 
static void test_drop_on_lookup(struct test_sk_lookup *skel)
{
<------>const struct test tests[] = {
<------><------>{
<------><------><------>.desc		= "TCP IPv4 drop on lookup",
<------><------><------>.lookup_prog	= skel->progs.lookup_drop,
<------><------><------>.sotype		= SOCK_STREAM,
<------><------><------>.connect_to	= { EXT_IP4, EXT_PORT },
<------><------><------>.listen_at	= { EXT_IP4, EXT_PORT },
<------><------>},
<------><------>{
<------><------><------>.desc		= "TCP IPv6 drop on lookup",
<------><------><------>.lookup_prog	= skel->progs.lookup_drop,
<------><------><------>.sotype		= SOCK_STREAM,
<------><------><------>.connect_to	= { EXT_IP6, EXT_PORT },
<------><------><------>.listen_at	= { EXT_IP6, EXT_PORT },
<------><------>},
<------><------>{
<------><------><------>.desc		= "UDP IPv4 drop on lookup",
<------><------><------>.lookup_prog	= skel->progs.lookup_drop,
<------><------><------>.sotype		= SOCK_DGRAM,
<------><------><------>.connect_to	= { EXT_IP4, EXT_PORT },
<------><------><------>.listen_at	= { EXT_IP4, EXT_PORT },
<------><------>},
<------><------>{
<------><------><------>.desc		= "UDP IPv6 drop on lookup",
<------><------><------>.lookup_prog	= skel->progs.lookup_drop,
<------><------><------>.sotype		= SOCK_DGRAM,
<------><------><------>.connect_to	= { EXT_IP6, EXT_PORT },
<------><------><------>.listen_at	= { EXT_IP6, INT_PORT },
<------><------>},
<------>};
<------>const struct test *t;
 
<------>for (t = tests; t < tests + ARRAY_SIZE(tests); t++) {
<------><------>if (test__start_subtest(t->desc))
<------><------><------>drop_on_lookup(t);
<------>}
}
 
static void drop_on_reuseport(const struct test *t)
{
<------>struct sockaddr_storage dst = { 0 };
<------>int client, server1, server2, err;
<------>struct bpf_link *lookup_link;
<------>ssize_t n;
 
<------>lookup_link = attach_lookup_prog(t->lookup_prog);
<------>if (!lookup_link)
<------><------>return;
 
<------>server1 = make_server(t->sotype, t->listen_at.ip, t->listen_at.port,
<------><------><------>      t->reuseport_prog);
<------>if (server1 < 0)
<------><------>goto detach;
 
<------>err = update_lookup_map(t->sock_map, SERVER_A, server1);
<------>if (err)
<------><------>goto detach;
 
<------>/* second server on destination address we should never reach */
<------>server2 = make_server(t->sotype, t->connect_to.ip, t->connect_to.port,
<------><------><------>      NULL /* reuseport prog */);
<------>if (server2 < 0)
<------><------>goto close_srv1;
 
<------>client = make_socket(t->sotype, t->connect_to.ip,
<------><------><------>     t->connect_to.port, &dst);
<------>if (client < 0)
<------><------>goto close_srv2;
 
<------>err = connect(client, (void *)&dst, inetaddr_len(&dst));
<------>if (t->sotype == SOCK_DGRAM) {
<------><------>err = send_byte(client);
<------><------>if (err)
<------><------><------>goto close_all;
 
<------><------>/* Read out asynchronous error */
<------><------>n = recv(client, NULL, 0, 0);
<------><------>err = n == -1;
<------>}
<------>if (CHECK(!err || errno != ECONNREFUSED, "connect",
<------><------>  "unexpected success or error\n"))
<------><------>log_err("expected ECONNREFUSED on connect");
 
close_all:
<------>close(client);
close_srv2:
<------>close(server2);
close_srv1:
<------>close(server1);
detach:
<------>bpf_link__destroy(lookup_link);
}
 
static void test_drop_on_reuseport(struct test_sk_lookup *skel)
{
<------>const struct test tests[] = {
<------><------>{
<------><------><------>.desc		= "TCP IPv4 drop on reuseport",
<------><------><------>.lookup_prog	= skel->progs.select_sock_a,
<------><------><------>.reuseport_prog	= skel->progs.reuseport_drop,
<------><------><------>.sock_map	= skel->maps.redir_map,
<------><------><------>.sotype		= SOCK_STREAM,
<------><------><------>.connect_to	= { EXT_IP4, EXT_PORT },
<------><------><------>.listen_at	= { INT_IP4, INT_PORT },
<------><------>},
<------><------>{
<------><------><------>.desc		= "TCP IPv6 drop on reuseport",
<------><------><------>.lookup_prog	= skel->progs.select_sock_a,
<------><------><------>.reuseport_prog	= skel->progs.reuseport_drop,
<------><------><------>.sock_map	= skel->maps.redir_map,
<------><------><------>.sotype		= SOCK_STREAM,
<------><------><------>.connect_to	= { EXT_IP6, EXT_PORT },
<------><------><------>.listen_at	= { INT_IP6, INT_PORT },
<------><------>},
<------><------>{
<------><------><------>.desc		= "UDP IPv4 drop on reuseport",
<------><------><------>.lookup_prog	= skel->progs.select_sock_a,
<------><------><------>.reuseport_prog	= skel->progs.reuseport_drop,
<------><------><------>.sock_map	= skel->maps.redir_map,
<------><------><------>.sotype		= SOCK_DGRAM,
<------><------><------>.connect_to	= { EXT_IP4, EXT_PORT },
<------><------><------>.listen_at	= { INT_IP4, INT_PORT },
<------><------>},
<------><------>{
<------><------><------>.desc		= "TCP IPv6 drop on reuseport",
<------><------><------>.lookup_prog	= skel->progs.select_sock_a,
<------><------><------>.reuseport_prog	= skel->progs.reuseport_drop,
<------><------><------>.sock_map	= skel->maps.redir_map,
<------><------><------>.sotype		= SOCK_STREAM,
<------><------><------>.connect_to	= { EXT_IP6, EXT_PORT },
<------><------><------>.listen_at	= { INT_IP6, INT_PORT },
<------><------>},
<------>};
<------>const struct test *t;
 
<------>for (t = tests; t < tests + ARRAY_SIZE(tests); t++) {
<------><------>if (test__start_subtest(t->desc))
<------><------><------>drop_on_reuseport(t);
<------>}
}
 
static void run_sk_assign(struct test_sk_lookup *skel,
<------><------><------>  struct bpf_program *lookup_prog,
<------><------><------>  const char *remote_ip, const char *local_ip)
{
<------>int server_fds[] = { [0 ... MAX_SERVERS - 1] = -1 };
<------>struct bpf_sk_lookup ctx;
<------>__u64 server_cookie;
<------>int i, err;
 
<------>DECLARE_LIBBPF_OPTS(bpf_test_run_opts, opts,
<------><------>.ctx_in = &ctx,
<------><------>.ctx_size_in = sizeof(ctx),
<------><------>.ctx_out = &ctx,
<------><------>.ctx_size_out = sizeof(ctx),
<------>);
 
<------>if (fill_sk_lookup_ctx(&ctx, local_ip, EXT_PORT, remote_ip, INT_PORT))
<------><------>return;
 
<------>ctx.protocol = IPPROTO_TCP;
 
<------>for (i = 0; i < ARRAY_SIZE(server_fds); i++) {
<------><------>server_fds[i] = make_server(SOCK_STREAM, local_ip, 0, NULL);
<------><------>if (server_fds[i] < 0)
<------><------><------>goto close_servers;
 
<------><------>err = update_lookup_map(skel->maps.redir_map, i,
<------><------><------><------><------>server_fds[i]);
<------><------>if (err)
<------><------><------>goto close_servers;
<------>}
 
<------>server_cookie = socket_cookie(server_fds[SERVER_B]);
<------>if (!server_cookie)
<------><------>return;
 
<------>err = bpf_prog_test_run_opts(bpf_program__fd(lookup_prog), &opts);
<------>if (CHECK(err, "test_run", "failed with error %d\n", errno))
<------><------>goto close_servers;
 
<------>if (CHECK(ctx.cookie == 0, "ctx.cookie", "no socket selected\n"))
<------><------>goto close_servers;
 
<------>CHECK(ctx.cookie != server_cookie, "ctx.cookie",
<------>      "selected sk %llu instead of %llu\n", ctx.cookie, server_cookie);
 
close_servers:
<------>for (i = 0; i < ARRAY_SIZE(server_fds); i++) {
<------><------>if (server_fds[i] != -1)
<------><------><------>close(server_fds[i]);
<------>}
}
 
static void run_sk_assign_v4(struct test_sk_lookup *skel,
<------><------><------>     struct bpf_program *lookup_prog)
{
<------>run_sk_assign(skel, lookup_prog, INT_IP4, EXT_IP4);
}
 
static void run_sk_assign_v6(struct test_sk_lookup *skel,
<------><------><------>     struct bpf_program *lookup_prog)
{
<------>run_sk_assign(skel, lookup_prog, INT_IP6, EXT_IP6);
}
 
static void run_sk_assign_connected(struct test_sk_lookup *skel,
<------><------><------><------>    int sotype)
{
<------>int err, client_fd, connected_fd, server_fd;
<------>struct bpf_link *lookup_link;
 
<------>server_fd = make_server(sotype, EXT_IP4, EXT_PORT, NULL);
<------>if (server_fd < 0)
<------><------>return;
 
<------>connected_fd = make_client(sotype, EXT_IP4, EXT_PORT);
<------>if (connected_fd < 0)
<------><------>goto out_close_server;
 
<------>/* Put a connected socket in redirect map */
<------>err = update_lookup_map(skel->maps.redir_map, SERVER_A, connected_fd);
<------>if (err)
<------><------>goto out_close_connected;
 
<------>lookup_link = attach_lookup_prog(skel->progs.sk_assign_esocknosupport);
<------>if (!lookup_link)
<------><------>goto out_close_connected;
 
<------>/* Try to redirect TCP SYN / UDP packet to a connected socket */
<------>client_fd = make_client(sotype, EXT_IP4, EXT_PORT);
<------>if (client_fd < 0)
<------><------>goto out_unlink_prog;
<------>if (sotype == SOCK_DGRAM) {
<------><------>send_byte(client_fd);
<------><------>recv_byte(server_fd);
<------>}
 
<------>close(client_fd);
out_unlink_prog:
<------>bpf_link__destroy(lookup_link);
out_close_connected:
<------>close(connected_fd);
out_close_server:
<------>close(server_fd);
}
 
static void test_sk_assign_helper(struct test_sk_lookup *skel)
{
<------>if (test__start_subtest("sk_assign returns EEXIST"))
<------><------>run_sk_assign_v4(skel, skel->progs.sk_assign_eexist);
<------>if (test__start_subtest("sk_assign honors F_REPLACE"))
<------><------>run_sk_assign_v4(skel, skel->progs.sk_assign_replace_flag);
<------>if (test__start_subtest("sk_assign accepts NULL socket"))
<------><------>run_sk_assign_v4(skel, skel->progs.sk_assign_null);
<------>if (test__start_subtest("access ctx->sk"))
<------><------>run_sk_assign_v4(skel, skel->progs.access_ctx_sk);
<------>if (test__start_subtest("narrow access to ctx v4"))
<------><------>run_sk_assign_v4(skel, skel->progs.ctx_narrow_access);
<------>if (test__start_subtest("narrow access to ctx v6"))
<------><------>run_sk_assign_v6(skel, skel->progs.ctx_narrow_access);
<------>if (test__start_subtest("sk_assign rejects TCP established"))
<------><------>run_sk_assign_connected(skel, SOCK_STREAM);
<------>if (test__start_subtest("sk_assign rejects UDP connected"))
<------><------>run_sk_assign_connected(skel, SOCK_DGRAM);
}
 
struct test_multi_prog {
<------>const char *desc;
<------>struct bpf_program *prog1;
<------>struct bpf_program *prog2;
<------>struct bpf_map *redir_map;
<------>struct bpf_map *run_map;
<------>int expect_errno;
<------>struct inet_addr listen_at;
};
 
static void run_multi_prog_lookup(const struct test_multi_prog *t)
{
<------>struct sockaddr_storage dst = {};
<------>int map_fd, server_fd, client_fd;
<------>struct bpf_link *link1, *link2;
<------>int prog_idx, done, err;
 
<------>map_fd = bpf_map__fd(t->run_map);
 
<------>done = 0;
<------>prog_idx = PROG1;
<------>err = bpf_map_update_elem(map_fd, &prog_idx, &done, BPF_ANY);
<------>if (CHECK(err, "bpf_map_update_elem", "failed\n"))
<------><------>return;
<------>prog_idx = PROG2;
<------>err = bpf_map_update_elem(map_fd, &prog_idx, &done, BPF_ANY);
<------>if (CHECK(err, "bpf_map_update_elem", "failed\n"))
<------><------>return;
 
<------>link1 = attach_lookup_prog(t->prog1);
<------>if (!link1)
<------><------>return;
<------>link2 = attach_lookup_prog(t->prog2);
<------>if (!link2)
<------><------>goto out_unlink1;
 
<------>server_fd = make_server(SOCK_STREAM, t->listen_at.ip,
<------><------><------><------>t->listen_at.port, NULL);
<------>if (server_fd < 0)
<------><------>goto out_unlink2;
 
<------>err = update_lookup_map(t->redir_map, SERVER_A, server_fd);
<------>if (err)
<------><------>goto out_close_server;
 
<------>client_fd = make_socket(SOCK_STREAM, EXT_IP4, EXT_PORT, &dst);
<------>if (client_fd < 0)
<------><------>goto out_close_server;
 
<------>err = connect(client_fd, (void *)&dst, inetaddr_len(&dst));
<------>if (CHECK(err && !t->expect_errno, "connect",
<------><------>  "unexpected error %d\n", errno))
<------><------>goto out_close_client;
<------>if (CHECK(err && t->expect_errno && errno != t->expect_errno,
<------><------>  "connect", "unexpected error %d\n", errno))
<------><------>goto out_close_client;
 
<------>done = 0;
<------>prog_idx = PROG1;
<------>err = bpf_map_lookup_elem(map_fd, &prog_idx, &done);
<------>CHECK(err, "bpf_map_lookup_elem", "failed\n");
<------>CHECK(!done, "bpf_map_lookup_elem", "PROG1 !done\n");
 
<------>done = 0;
<------>prog_idx = PROG2;
<------>err = bpf_map_lookup_elem(map_fd, &prog_idx, &done);
<------>CHECK(err, "bpf_map_lookup_elem", "failed\n");
<------>CHECK(!done, "bpf_map_lookup_elem", "PROG2 !done\n");
 
out_close_client:
<------>close(client_fd);
out_close_server:
<------>close(server_fd);
out_unlink2:
<------>bpf_link__destroy(link2);
out_unlink1:
<------>bpf_link__destroy(link1);
}
 
static void test_multi_prog_lookup(struct test_sk_lookup *skel)
{
<------>struct test_multi_prog tests[] = {
<------><------>{
<------><------><------>.desc		= "multi prog - pass, pass",
<------><------><------>.prog1		= skel->progs.multi_prog_pass1,
<------><------><------>.prog2		= skel->progs.multi_prog_pass2,
<------><------><------>.listen_at	= { EXT_IP4, EXT_PORT },
<------><------>},
<------><------>{
<------><------><------>.desc		= "multi prog - drop, drop",
<------><------><------>.prog1		= skel->progs.multi_prog_drop1,
<------><------><------>.prog2		= skel->progs.multi_prog_drop2,
<------><------><------>.listen_at	= { EXT_IP4, EXT_PORT },
<------><------><------>.expect_errno	= ECONNREFUSED,
<------><------>},
<------><------>{
<------><------><------>.desc		= "multi prog - pass, drop",
<------><------><------>.prog1		= skel->progs.multi_prog_pass1,
<------><------><------>.prog2		= skel->progs.multi_prog_drop2,
<------><------><------>.listen_at	= { EXT_IP4, EXT_PORT },
<------><------><------>.expect_errno	= ECONNREFUSED,
<------><------>},
<------><------>{
<------><------><------>.desc		= "multi prog - drop, pass",
<------><------><------>.prog1		= skel->progs.multi_prog_drop1,
<------><------><------>.prog2		= skel->progs.multi_prog_pass2,
<------><------><------>.listen_at	= { EXT_IP4, EXT_PORT },
<------><------><------>.expect_errno	= ECONNREFUSED,
<------><------>},
<------><------>{
<------><------><------>.desc		= "multi prog - pass, redir",
<------><------><------>.prog1		= skel->progs.multi_prog_pass1,
<------><------><------>.prog2		= skel->progs.multi_prog_redir2,
<------><------><------>.listen_at	= { INT_IP4, INT_PORT },
<------><------>},
<------><------>{
<------><------><------>.desc		= "multi prog - redir, pass",
<------><------><------>.prog1		= skel->progs.multi_prog_redir1,
<------><------><------>.prog2		= skel->progs.multi_prog_pass2,
<------><------><------>.listen_at	= { INT_IP4, INT_PORT },
<------><------>},
<------><------>{
<------><------><------>.desc		= "multi prog - drop, redir",
<------><------><------>.prog1		= skel->progs.multi_prog_drop1,
<------><------><------>.prog2		= skel->progs.multi_prog_redir2,
<------><------><------>.listen_at	= { INT_IP4, INT_PORT },
<------><------>},
<------><------>{
<------><------><------>.desc		= "multi prog - redir, drop",
<------><------><------>.prog1		= skel->progs.multi_prog_redir1,
<------><------><------>.prog2		= skel->progs.multi_prog_drop2,
<------><------><------>.listen_at	= { INT_IP4, INT_PORT },
<------><------>},
<------><------>{
<------><------><------>.desc		= "multi prog - redir, redir",
<------><------><------>.prog1		= skel->progs.multi_prog_redir1,
<------><------><------>.prog2		= skel->progs.multi_prog_redir2,
<------><------><------>.listen_at	= { INT_IP4, INT_PORT },
<------><------>},
<------>};
<------>struct test_multi_prog *t;
 
<------>for (t = tests; t < tests + ARRAY_SIZE(tests); t++) {
<------><------>t->redir_map = skel->maps.redir_map;
<------><------>t->run_map = skel->maps.run_map;
<------><------>if (test__start_subtest(t->desc))
<------><------><------>run_multi_prog_lookup(t);
<------>}
}
 
static void run_tests(struct test_sk_lookup *skel)
{
<------>if (test__start_subtest("query lookup prog"))
<------><------>query_lookup_prog(skel);
<------>test_redirect_lookup(skel);
<------>test_drop_on_lookup(skel);
<------>test_drop_on_reuseport(skel);
<------>test_sk_assign_helper(skel);
<------>test_multi_prog_lookup(skel);
}
 
static int switch_netns(void)
{
<------>static const char * const setup_script[] = {
<------><------>"ip -6 addr add dev lo " EXT_IP6 "/128",
<------><------>"ip -6 addr add dev lo " INT_IP6 "/128",
<------><------>"ip link set dev lo up",
<------><------>NULL,
<------>};
<------>const char * const *cmd;
<------>int err;
 
<------>err = unshare(CLONE_NEWNET);
<------>if (CHECK(err, "unshare", "failed\n")) {
<------><------>log_err("unshare(CLONE_NEWNET)");
<------><------>return -1;
<------>}
 
<------>for (cmd = setup_script; *cmd; cmd++) {
<------><------>err = system(*cmd);
<------><------>if (CHECK(err, "system", "failed\n")) {
<------><------><------>log_err("system(%s)", *cmd);
<------><------><------>return -1;
<------><------>}
<------>}
 
<------>return 0;
}
 
void test_sk_lookup(void)
{
<------>struct test_sk_lookup *skel;
<------>int err;
 
<------>err = switch_netns();
<------>if (err)
<------><------>return;
 
<------>skel = test_sk_lookup__open_and_load();
<------>if (CHECK(!skel, "skel open_and_load", "failed\n"))
<------><------>return;
 
<------>run_tests(skel);
 
<------>test_sk_lookup__destroy(skel);
}
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