+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (c) 2018 Facebook
-
-#define _GNU_SOURCE
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-
-#include <arpa/inet.h>
-#include <netinet/in.h>
-#include <sys/types.h>
-#include <sys/select.h>
-#include <sys/socket.h>
-
-#include <linux/filter.h>
-
-#include <bpf/bpf.h>
-#include <bpf/libbpf.h>
-
-#include "cgroup_helpers.h"
-#include "network_helpers.h"
-#include "testing_helpers.h"
-#include "bpf_util.h"
-
-#ifndef ENOTSUPP
-# define ENOTSUPP 524
-#endif
-
-#define CG_PATH "/foo"
-#define CONNECT4_PROG_PATH "./connect4_prog.bpf.o"
-#define CONNECT6_PROG_PATH "./connect6_prog.bpf.o"
-#define SENDMSG4_PROG_PATH "./sendmsg4_prog.bpf.o"
-#define SENDMSG6_PROG_PATH "./sendmsg6_prog.bpf.o"
-#define RECVMSG4_PROG_PATH "./recvmsg4_prog.bpf.o"
-#define RECVMSG6_PROG_PATH "./recvmsg6_prog.bpf.o"
-#define BIND4_PROG_PATH "./bind4_prog.bpf.o"
-#define BIND6_PROG_PATH "./bind6_prog.bpf.o"
-
-#define SERV4_IP "192.168.1.254"
-#define SERV4_REWRITE_IP "127.0.0.1"
-#define SRC4_IP "172.16.0.1"
-#define SRC4_REWRITE_IP "127.0.0.4"
-#define SERV4_PORT 4040
-#define SERV4_REWRITE_PORT 4444
-
-#define SERV6_IP "face:b00c:1234:5678::abcd"
-#define SERV6_REWRITE_IP "::1"
-#define SERV6_V4MAPPED_IP "::ffff:192.168.0.4"
-#define SRC6_IP "::1"
-#define SRC6_REWRITE_IP "::6"
-#define WILDCARD6_IP "::"
-#define SERV6_PORT 6060
-#define SERV6_REWRITE_PORT 6666
-
-#define INET_NTOP_BUF 40
-
-struct sock_addr_test;
-
-typedef int (*load_fn)(const struct sock_addr_test *test);
-typedef int (*info_fn)(int, struct sockaddr *, socklen_t *);
-
-char bpf_log_buf[BPF_LOG_BUF_SIZE];
-
-struct sock_addr_test {
- const char *descr;
- /* BPF prog properties */
- load_fn loadfn;
- enum bpf_attach_type expected_attach_type;
- enum bpf_attach_type attach_type;
- /* Socket properties */
- int domain;
- int type;
- /* IP:port pairs for BPF prog to override */
- const char *requested_ip;
- unsigned short requested_port;
- const char *expected_ip;
- unsigned short expected_port;
- const char *expected_src_ip;
- /* Expected test result */
- enum {
- LOAD_REJECT,
- ATTACH_REJECT,
- ATTACH_OKAY,
- SYSCALL_EPERM,
- SYSCALL_ENOTSUPP,
- SUCCESS,
- } expected_result;
-};
-
-static struct sock_addr_test tests[] = {
-};
-
-static int cmp_addr(const struct sockaddr_storage *addr1,
- const struct sockaddr_storage *addr2, int cmp_port)
-{
- const struct sockaddr_in *four1, *four2;
- const struct sockaddr_in6 *six1, *six2;
-
- if (addr1->ss_family != addr2->ss_family)
- return -1;
-
- if (addr1->ss_family == AF_INET) {
- four1 = (const struct sockaddr_in *)addr1;
- four2 = (const struct sockaddr_in *)addr2;
- return !((four1->sin_port == four2->sin_port || !cmp_port) &&
- four1->sin_addr.s_addr == four2->sin_addr.s_addr);
- } else if (addr1->ss_family == AF_INET6) {
- six1 = (const struct sockaddr_in6 *)addr1;
- six2 = (const struct sockaddr_in6 *)addr2;
- return !((six1->sin6_port == six2->sin6_port || !cmp_port) &&
- !memcmp(&six1->sin6_addr, &six2->sin6_addr,
- sizeof(struct in6_addr)));
- }
-
- return -1;
-}
-
-static int cmp_sock_addr(info_fn fn, int sock1,
- const struct sockaddr_storage *addr2, int cmp_port)
-{
- struct sockaddr_storage addr1;
- socklen_t len1 = sizeof(addr1);
-
- memset(&addr1, 0, len1);
- if (fn(sock1, (struct sockaddr *)&addr1, (socklen_t *)&len1) != 0)
- return -1;
-
- return cmp_addr(&addr1, addr2, cmp_port);
-}
-
-static int cmp_local_ip(int sock1, const struct sockaddr_storage *addr2)
-{
- return cmp_sock_addr(getsockname, sock1, addr2, /*cmp_port*/ 0);
-}
-
-static int cmp_local_addr(int sock1, const struct sockaddr_storage *addr2)
-{
- return cmp_sock_addr(getsockname, sock1, addr2, /*cmp_port*/ 1);
-}
-
-static int cmp_peer_addr(int sock1, const struct sockaddr_storage *addr2)
-{
- return cmp_sock_addr(getpeername, sock1, addr2, /*cmp_port*/ 1);
-}
-
-int init_pktinfo(int domain, struct cmsghdr *cmsg)
-{
- struct in6_pktinfo *pktinfo6;
- struct in_pktinfo *pktinfo4;
-
- if (domain == AF_INET) {
- cmsg->cmsg_level = SOL_IP;
- cmsg->cmsg_type = IP_PKTINFO;
- cmsg->cmsg_len = CMSG_LEN(sizeof(struct in_pktinfo));
- pktinfo4 = (struct in_pktinfo *)CMSG_DATA(cmsg);
- memset(pktinfo4, 0, sizeof(struct in_pktinfo));
- if (inet_pton(domain, SRC4_IP,
- (void *)&pktinfo4->ipi_spec_dst) != 1)
- return -1;
- } else if (domain == AF_INET6) {
- cmsg->cmsg_level = SOL_IPV6;
- cmsg->cmsg_type = IPV6_PKTINFO;
- cmsg->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo));
- pktinfo6 = (struct in6_pktinfo *)CMSG_DATA(cmsg);
- memset(pktinfo6, 0, sizeof(struct in6_pktinfo));
- if (inet_pton(domain, SRC6_IP,
- (void *)&pktinfo6->ipi6_addr) != 1)
- return -1;
- } else {
- return -1;
- }
-
- return 0;
-}
-
-static int sendmsg_to_server(int type, const struct sockaddr_storage *addr,
- socklen_t addr_len, int set_cmsg, int flags,
- int *syscall_err)
-{
- union {
- char buf[CMSG_SPACE(sizeof(struct in6_pktinfo))];
- struct cmsghdr align;
- } control6;
- union {
- char buf[CMSG_SPACE(sizeof(struct in_pktinfo))];
- struct cmsghdr align;
- } control4;
- struct msghdr hdr;
- struct iovec iov;
- char data = 'a';
- int domain;
- int fd = -1;
-
- domain = addr->ss_family;
-
- if (domain != AF_INET && domain != AF_INET6) {
- log_err("Unsupported address family");
- goto err;
- }
-
- fd = socket(domain, type, 0);
- if (fd == -1) {
- log_err("Failed to create client socket");
- goto err;
- }
-
- memset(&iov, 0, sizeof(iov));
- iov.iov_base = &data;
- iov.iov_len = sizeof(data);
-
- memset(&hdr, 0, sizeof(hdr));
- hdr.msg_name = (void *)addr;
- hdr.msg_namelen = addr_len;
- hdr.msg_iov = &iov;
- hdr.msg_iovlen = 1;
-
- if (set_cmsg) {
- if (domain == AF_INET) {
- hdr.msg_control = &control4;
- hdr.msg_controllen = sizeof(control4.buf);
- } else if (domain == AF_INET6) {
- hdr.msg_control = &control6;
- hdr.msg_controllen = sizeof(control6.buf);
- }
- if (init_pktinfo(domain, CMSG_FIRSTHDR(&hdr))) {
- log_err("Fail to init pktinfo");
- goto err;
- }
- }
-
- if (sendmsg(fd, &hdr, flags) != sizeof(data)) {
- log_err("Fail to send message to server");
- *syscall_err = errno;
- goto err;
- }
-
- goto out;
-err:
- close(fd);
- fd = -1;
-out:
- return fd;
-}
-
-static int fastconnect_to_server(const struct sockaddr_storage *addr,
- socklen_t addr_len)
-{
- int sendmsg_err;
-
- return sendmsg_to_server(SOCK_STREAM, addr, addr_len, /*set_cmsg*/0,
- MSG_FASTOPEN, &sendmsg_err);
-}
-
-static int recvmsg_from_client(int sockfd, struct sockaddr_storage *src_addr)
-{
- struct timeval tv;
- struct msghdr hdr;
- struct iovec iov;
- char data[64];
- fd_set rfds;
-
- FD_ZERO(&rfds);
- FD_SET(sockfd, &rfds);
-
- tv.tv_sec = 2;
- tv.tv_usec = 0;
-
- if (select(sockfd + 1, &rfds, NULL, NULL, &tv) <= 0 ||
- !FD_ISSET(sockfd, &rfds))
- return -1;
-
- memset(&iov, 0, sizeof(iov));
- iov.iov_base = data;
- iov.iov_len = sizeof(data);
-
- memset(&hdr, 0, sizeof(hdr));
- hdr.msg_name = src_addr;
- hdr.msg_namelen = sizeof(struct sockaddr_storage);
- hdr.msg_iov = &iov;
- hdr.msg_iovlen = 1;
-
- return recvmsg(sockfd, &hdr, 0);
-}
-
-static int init_addrs(const struct sock_addr_test *test,
- struct sockaddr_storage *requested_addr,
- struct sockaddr_storage *expected_addr,
- struct sockaddr_storage *expected_src_addr)
-{
- if (make_sockaddr(test->domain, test->expected_ip, test->expected_port,
- expected_addr, NULL) == -1)
- goto err;
-
- if (make_sockaddr(test->domain, test->requested_ip, test->requested_port,
- requested_addr, NULL) == -1)
- goto err;
-
- if (test->expected_src_ip &&
- make_sockaddr(test->domain, test->expected_src_ip, 0,
- expected_src_addr, NULL) == -1)
- goto err;
-
- return 0;
-err:
- return -1;
-}
-
-static int run_bind_test_case(const struct sock_addr_test *test)
-{
- socklen_t addr_len = sizeof(struct sockaddr_storage);
- struct sockaddr_storage requested_addr;
- struct sockaddr_storage expected_addr;
- int clientfd = -1;
- int servfd = -1;
- int err = 0;
-
- if (init_addrs(test, &requested_addr, &expected_addr, NULL))
- goto err;
-
- servfd = start_server_addr(test->type, &requested_addr, addr_len, NULL);
- if (servfd == -1)
- goto err;
-
- if (cmp_local_addr(servfd, &expected_addr))
- goto err;
-
- /* Try to connect to server just in case */
- clientfd = connect_to_addr(test->type, &expected_addr, addr_len, NULL);
- if (clientfd == -1)
- goto err;
-
- goto out;
-err:
- err = -1;
-out:
- close(clientfd);
- close(servfd);
- return err;
-}
-
-static int run_connect_test_case(const struct sock_addr_test *test)
-{
- socklen_t addr_len = sizeof(struct sockaddr_storage);
- struct sockaddr_storage expected_src_addr;
- struct sockaddr_storage requested_addr;
- struct sockaddr_storage expected_addr;
- int clientfd = -1;
- int servfd = -1;
- int err = 0;
-
- if (init_addrs(test, &requested_addr, &expected_addr,
- &expected_src_addr))
- goto err;
-
- /* Prepare server to connect to */
- servfd = start_server_addr(test->type, &expected_addr, addr_len, NULL);
- if (servfd == -1)
- goto err;
-
- clientfd = connect_to_addr(test->type, &requested_addr, addr_len, NULL);
- if (clientfd == -1)
- goto err;
-
- /* Make sure src and dst addrs were overridden properly */
- if (cmp_peer_addr(clientfd, &expected_addr))
- goto err;
-
- if (cmp_local_ip(clientfd, &expected_src_addr))
- goto err;
-
- if (test->type == SOCK_STREAM) {
- /* Test TCP Fast Open scenario */
- clientfd = fastconnect_to_server(&requested_addr, addr_len);
- if (clientfd == -1)
- goto err;
-
- /* Make sure src and dst addrs were overridden properly */
- if (cmp_peer_addr(clientfd, &expected_addr))
- goto err;
-
- if (cmp_local_ip(clientfd, &expected_src_addr))
- goto err;
- }
-
- goto out;
-err:
- err = -1;
-out:
- close(clientfd);
- close(servfd);
- return err;
-}
-
-static int run_xmsg_test_case(const struct sock_addr_test *test, int max_cmsg)
-{
- socklen_t addr_len = sizeof(struct sockaddr_storage);
- struct sockaddr_storage expected_addr;
- struct sockaddr_storage server_addr;
- struct sockaddr_storage sendmsg_addr;
- struct sockaddr_storage recvmsg_addr;
- int clientfd = -1;
- int servfd = -1;
- int set_cmsg;
- int err = 0;
-
- if (test->type != SOCK_DGRAM)
- goto err;
-
- if (init_addrs(test, &sendmsg_addr, &server_addr, &expected_addr))
- goto err;
-
- /* Prepare server to sendmsg to */
- servfd = start_server_addr(test->type, &server_addr, addr_len, NULL);
- if (servfd == -1)
- goto err;
-
- for (set_cmsg = 0; set_cmsg <= max_cmsg; ++set_cmsg) {
- if (clientfd >= 0)
- close(clientfd);
-
- clientfd = sendmsg_to_server(test->type, &sendmsg_addr,
- addr_len, set_cmsg, /*flags*/0,
- &err);
- if (err)
- goto out;
- else if (clientfd == -1)
- goto err;
-
- /* Try to receive message on server instead of using
- * getpeername(2) on client socket, to check that client's
- * destination address was rewritten properly, since
- * getpeername(2) doesn't work with unconnected datagram
- * sockets.
- *
- * Get source address from recvmsg(2) as well to make sure
- * source was rewritten properly: getsockname(2) can't be used
- * since socket is unconnected and source defined for one
- * specific packet may differ from the one used by default and
- * returned by getsockname(2).
- */
- if (recvmsg_from_client(servfd, &recvmsg_addr) == -1)
- goto err;
-
- if (cmp_addr(&recvmsg_addr, &expected_addr, /*cmp_port*/0))
- goto err;
- }
-
- goto out;
-err:
- err = -1;
-out:
- close(clientfd);
- close(servfd);
- return err;
-}
-
-static int run_test_case(int cgfd, const struct sock_addr_test *test)
-{
- int progfd = -1;
- int err = 0;
-
- printf("Test case: %s .. ", test->descr);
-
- progfd = test->loadfn(test);
- if (test->expected_result == LOAD_REJECT && progfd < 0)
- goto out;
- else if (test->expected_result == LOAD_REJECT || progfd < 0)
- goto err;
-
- err = bpf_prog_attach(progfd, cgfd, test->attach_type,
- BPF_F_ALLOW_OVERRIDE);
- if (test->expected_result == ATTACH_REJECT && err) {
- err = 0; /* error was expected, reset it */
- goto out;
- } else if (test->expected_result == ATTACH_REJECT || err) {
- goto err;
- } else if (test->expected_result == ATTACH_OKAY) {
- err = 0;
- goto out;
- }
-
- switch (test->attach_type) {
- case BPF_CGROUP_INET4_BIND:
- case BPF_CGROUP_INET6_BIND:
- err = run_bind_test_case(test);
- break;
- case BPF_CGROUP_INET4_CONNECT:
- case BPF_CGROUP_INET6_CONNECT:
- err = run_connect_test_case(test);
- break;
- case BPF_CGROUP_UDP4_SENDMSG:
- case BPF_CGROUP_UDP6_SENDMSG:
- err = run_xmsg_test_case(test, 1);
- break;
- case BPF_CGROUP_UDP4_RECVMSG:
- case BPF_CGROUP_UDP6_RECVMSG:
- err = run_xmsg_test_case(test, 0);
- break;
- default:
- goto err;
- }
-
- if (test->expected_result == SYSCALL_EPERM && err == EPERM) {
- err = 0; /* error was expected, reset it */
- goto out;
- }
-
- if (test->expected_result == SYSCALL_ENOTSUPP && err == ENOTSUPP) {
- err = 0; /* error was expected, reset it */
- goto out;
- }
-
- if (err || test->expected_result != SUCCESS)
- goto err;
-
- goto out;
-err:
- err = -1;
-out:
- /* Detaching w/o checking return code: best effort attempt. */
- if (progfd != -1)
- bpf_prog_detach(cgfd, test->attach_type);
- close(progfd);
- printf("[%s]\n", err ? "FAIL" : "PASS");
- return err;
-}
-
-static int run_tests(int cgfd)
-{
- int passes = 0;
- int fails = 0;
- int i;
-
- for (i = 0; i < ARRAY_SIZE(tests); ++i) {
- if (run_test_case(cgfd, &tests[i]))
- ++fails;
- else
- ++passes;
- }
- printf("Summary: %d PASSED, %d FAILED\n", passes, fails);
- return fails ? -1 : 0;
-}
-
-int main(int argc, char **argv)
-{
- int cgfd = -1;
- int err = 0;
-
- if (argc < 2) {
- fprintf(stderr,
- "%s has to be run via %s.sh. Skip direct run.\n",
- argv[0], argv[0]);
- exit(err);
- }
-
- cgfd = cgroup_setup_and_join(CG_PATH);
- if (cgfd < 0)
- goto err;
-
- /* Use libbpf 1.0 API mode */
- libbpf_set_strict_mode(LIBBPF_STRICT_ALL);
-
- if (run_tests(cgfd))
- goto err;
-
- goto out;
-err:
- err = -1;
-out:
- close(cgfd);
- cleanup_cgroup_environment();
- return err;
-}
projects / linux.git / commitdiff