From patchwork Fri Sep 23 20:13:09 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Safonov X-Patchwork-Id: 12987030 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B3B94C04A95 for ; Fri, 23 Sep 2022 20:17:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229724AbiIWURR (ORCPT ); Fri, 23 Sep 2022 16:17:17 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43604 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232930AbiIWUPN (ORCPT ); Fri, 23 Sep 2022 16:15:13 -0400 Received: from mail-wm1-x335.google.com (mail-wm1-x335.google.com [IPv6:2a00:1450:4864:20::335]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D1065133C92 for ; Fri, 23 Sep 2022 13:14:06 -0700 (PDT) Received: by mail-wm1-x335.google.com with SMTP id l8so896056wmi.2 for ; Fri, 23 Sep 2022 13:14:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=arista.com; s=google; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date; bh=6JEtek2Y7rM+cJSPbM8FsaEFwhMIZ+whA+Lhvbk5Mtc=; b=U71dT084xbkT1bJSU/0qvl9Kh50BEHmCfhLJ9+LkMdvekw3goG8XoIzxtVvyjCbJhz trxBgHc+LTwUSZdqTb8s0+B8dGu4gxYsOpLEbsMJPVsBNt6oivNpEU+aaS3iHPqBJWZ8 6Eosp88GTRSplA9ess8xuQigedgqg6LWJ6iGlud8cZf180HXOIgMzJGwwoyJlRKcBuDz R98JKSkLuRZ2aX4AI9sIUMRNAgOz8QX1x6W0fboWKnd1meIYjN8onoeNuqbIqln2Isa4 55+FiYwNOB6Js8BVrIFQHLU3cceIDKKNAQ2U71DDbaXBEsSK3N243LU/lCiqwxiG3J13 3arQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date; bh=6JEtek2Y7rM+cJSPbM8FsaEFwhMIZ+whA+Lhvbk5Mtc=; b=MKHKbpcvAMzdq0eBHnGI5MDc+JmG+yHng5nJU2/iyRkaQpyHNO5EWfv83k3qWwyu6m +CJrDYIiwi5ZebmkmgEaHThrN/xkUnl8n0FZUuelkunCoo/7nVX3+oPPaB9k/sG/iwUY g0tF5271IaivAek2i4UOvvmpQWSeCMKnrurC4H6JaZFVr+J5tT7lO5z0Q/gow2V+4WLA LFY2BDJNckTxswhmBaT//MdbBW6RnOUTlj80eXPKy9ptt+/nB0Xmr+229V/G+tnPXnhN LeR8nRuyBWN8VG404ZqirQxchP/F/XW9QNTXj6RCa2w8w8782Pag0UoGl0jUkp07p2d1 GWhQ== X-Gm-Message-State: ACrzQf2Govm9ydDxgGtsphNOBoST3e3exEcoqTkL8CYsr4SuN50UdVfc PK3NR1QY85qskOmltDm6HCCvsA== X-Google-Smtp-Source: AMsMyM6q56K5Om8jamQJOFalU4yvCdDsaB4nTEpSOXDQrxDbL/tm0spc4e/SHz9K0VbruJxwXvp9+g== X-Received: by 2002:a05:600c:5124:b0:3b4:faef:87be with SMTP id o36-20020a05600c512400b003b4faef87bemr7409832wms.68.1663964046013; Fri, 23 Sep 2022 13:14:06 -0700 (PDT) Received: from Mindolluin.ire.aristanetworks.com ([217.173.96.166]) by smtp.gmail.com with ESMTPSA id k11-20020a05600c0b4b00b003b492753826sm3281056wmr.43.2022.09.23.13.14.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 23 Sep 2022 13:14:05 -0700 (PDT) From: Dmitry Safonov To: linux-kernel@vger.kernel.org, David Ahern , Eric Dumazet Cc: Dmitry Safonov , Andy Lutomirski , Ard Biesheuvel , Bob Gilligan , Dan Carpenter , "David S. Miller" , Dmitry Safonov <0x7f454c46@gmail.com>, Eric Biggers , "Eric W. Biederman" , Francesco Ruggeri , Herbert Xu , Hideaki YOSHIFUJI , Ivan Delalande , Jakub Kicinski , Leonard Crestez , Paolo Abeni , Salam Noureddine , Shuah Khan , netdev@vger.kernel.org, linux-crypto@vger.kernel.org Subject: [PATCH v2 25/35] selftests/net: Add TCP-AO library Date: Fri, 23 Sep 2022 21:13:09 +0100 Message-Id: <20220923201319.493208-26-dima@arista.com> X-Mailer: git-send-email 2.37.2 In-Reply-To: <20220923201319.493208-1-dima@arista.com> References: <20220923201319.493208-1-dima@arista.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org Provide functions to create selftests dedicated to TCP-AO. They can run in parallel, as they use temporary net namespaces. They can be very specific to the feature being tested. This will allow to create a lot of TCP-AO tests, without complicating one binary with many --options and to create scenarios, that are hard to put in bash script that uses one binary. Signed-off-by: Dmitry Safonov --- tools/testing/selftests/Makefile | 1 + tools/testing/selftests/net/tcp_ao/.gitignore | 2 + tools/testing/selftests/net/tcp_ao/Makefile | 45 +++ tools/testing/selftests/net/tcp_ao/connect.c | 81 +++++ .../testing/selftests/net/tcp_ao/lib/aolib.h | 333 +++++++++++++++++ .../selftests/net/tcp_ao/lib/netlink.c | 341 ++++++++++++++++++ tools/testing/selftests/net/tcp_ao/lib/proc.c | 267 ++++++++++++++ .../testing/selftests/net/tcp_ao/lib/setup.c | 297 +++++++++++++++ tools/testing/selftests/net/tcp_ao/lib/sock.c | 294 +++++++++++++++ .../testing/selftests/net/tcp_ao/lib/utils.c | 30 ++ 10 files changed, 1691 insertions(+) create mode 100644 tools/testing/selftests/net/tcp_ao/.gitignore create mode 100644 tools/testing/selftests/net/tcp_ao/Makefile create mode 100644 tools/testing/selftests/net/tcp_ao/connect.c create mode 100644 tools/testing/selftests/net/tcp_ao/lib/aolib.h create mode 100644 tools/testing/selftests/net/tcp_ao/lib/netlink.c create mode 100644 tools/testing/selftests/net/tcp_ao/lib/proc.c create mode 100644 tools/testing/selftests/net/tcp_ao/lib/setup.c create mode 100644 tools/testing/selftests/net/tcp_ao/lib/sock.c create mode 100644 tools/testing/selftests/net/tcp_ao/lib/utils.c diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile index 1fc89b8ef433..f547db175507 100644 --- a/tools/testing/selftests/Makefile +++ b/tools/testing/selftests/Makefile @@ -48,6 +48,7 @@ TARGETS += net TARGETS += net/af_unix TARGETS += net/forwarding TARGETS += net/mptcp +TARGETS += net/tcp_ao TARGETS += netfilter TARGETS += nsfs TARGETS += pidfd diff --git a/tools/testing/selftests/net/tcp_ao/.gitignore b/tools/testing/selftests/net/tcp_ao/.gitignore new file mode 100644 index 000000000000..e8bb81b715b7 --- /dev/null +++ b/tools/testing/selftests/net/tcp_ao/.gitignore @@ -0,0 +1,2 @@ +*_ipv4 +*_ipv6 diff --git a/tools/testing/selftests/net/tcp_ao/Makefile b/tools/testing/selftests/net/tcp_ao/Makefile new file mode 100644 index 000000000000..cb23d67944d7 --- /dev/null +++ b/tools/testing/selftests/net/tcp_ao/Makefile @@ -0,0 +1,45 @@ +# SPDX-License-Identifier: GPL-2.0 +TEST_BOTH_AF := connect + +TEST_IPV4_PROGS := $(TEST_BOTH_AF:%=%_ipv4) +TEST_IPV6_PROGS := $(TEST_BOTH_AF:%=%_ipv6) + +TEST_GEN_PROGS := $(TEST_IPV4_PROGS) $(TEST_IPV6_PROGS) + +top_srcdir := ../../../../.. +KSFT_KHDR_INSTALL := 1 +include ../../lib.mk + +HOSTAR ?= ar + +# Drop it on port to linux/master with commit 8ce72dc32578 +.DEFAULT_GOAL := all + +LIBDIR := $(OUTPUT)/lib +LIB := $(LIBDIR)/libaotst.a +LDLIBS += $(LIB) -pthread +LIBDEPS := lib/aolib.h Makefile + +CFLAGS := -Wall -O2 -g -D_GNU_SOURCE -fno-strict-aliasing +CFLAGS += -I ../../../../../usr/include/ -iquote $(LIBDIR) +CFLAGS += -I ../../../../include/ + +# Library +LIBSRC := setup.c netlink.c utils.c sock.c proc.c +LIBOBJ := $(LIBSRC:%.c=$(LIBDIR)/%.o) +EXTRA_CLEAN += $(LIBOBJ) $(LIB) + +$(LIB): $(LIBOBJ) + $(HOSTAR) rcs $@ $^ + +$(LIBDIR)/%.o: ./lib/%.c $(LIBDEPS) + $(CC) $< $(CFLAGS) $(CPPFLAGS) -o $@ -c + +$(TEST_GEN_PROGS): $(LIB) + +$(OUTPUT)/%_ipv4: %.c + $(LINK.c) $^ $(LDLIBS) -o $@ + +$(OUTPUT)/%_ipv6: %.c + $(LINK.c) -DIPV6_TEST $^ $(LDLIBS) -o $@ + diff --git a/tools/testing/selftests/net/tcp_ao/connect.c b/tools/testing/selftests/net/tcp_ao/connect.c new file mode 100644 index 000000000000..02aa50f0266c --- /dev/null +++ b/tools/testing/selftests/net/tcp_ao/connect.c @@ -0,0 +1,81 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Author: Dmitry Safonov */ +#include +#include "aolib.h" + +static void *server_fn(void *arg) +{ + int err, sk, lsk; + ssize_t bytes; + + lsk = test_listen_socket(this_ip_addr, test_server_port, 1); + + if (test_set_ao(lsk, "password", 0, this_ip_dest, -1, 100, 100)) + test_error("setsockopt(TCP_AO)"); + synchronize_threads(); + + err = test_wait_fd(lsk, TEST_TIMEOUT_SEC, 0); + if (!err) + test_error("timeouted for accept()"); + else if (err < 0) + test_error("test_wait_fd()"); + + sk = accept(lsk, NULL, NULL); + if (sk < 0) + test_error("accept()"); + + synchronize_threads(); + + bytes = test_server_run(sk, 0, 0); + + test_fail("server served: %zd", bytes); + return NULL; +} + +static void *client_fn(void *arg) +{ + int sk = socket(test_family, SOCK_STREAM, IPPROTO_TCP); + uint64_t before_aogood, after_aogood; + const size_t nr_packets = 20; + struct netstat *ns_before, *ns_after; + + if (sk < 0) + test_error("socket()"); + + if (test_set_ao(sk, "password", 0, this_ip_dest, -1, 100, 100)) + test_error("setsockopt(TCP_AO)"); + + synchronize_threads(); + if (test_connect_socket(sk, this_ip_dest, test_server_port) <= 0) + test_error("failed to connect()"); + synchronize_threads(); + + ns_before = netstat_read(); + before_aogood = netstat_get(ns_before, "TCPAOGood", NULL); + if (test_client_verify(sk, 100, nr_packets, TEST_TIMEOUT_SEC)) { + test_fail("verify failed"); + return NULL; + } + + ns_after = netstat_read(); + after_aogood = netstat_get(ns_after, "TCPAOGood", NULL); + netstat_print_diff(ns_before, ns_after); + netstat_free(ns_before); + netstat_free(ns_after); + + if (nr_packets > (after_aogood - before_aogood)) { + test_fail("TCPAOGood counter mismatch: %zu > (%zu - %zu)", + nr_packets, after_aogood, before_aogood); + return NULL; + } + + test_ok("connect TCPAOGood %" PRIu64 " => %" PRIu64 ", sent %" PRIu64, + before_aogood, after_aogood, nr_packets); + return NULL; +} + +int main(int argc, char *argv[]) +{ + test_init(1, server_fn, client_fn); + return 0; +} diff --git a/tools/testing/selftests/net/tcp_ao/lib/aolib.h b/tools/testing/selftests/net/tcp_ao/lib/aolib.h new file mode 100644 index 000000000000..d5810fd04816 --- /dev/null +++ b/tools/testing/selftests/net/tcp_ao/lib/aolib.h @@ -0,0 +1,333 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * TCP-AO selftest library. Provides helpers to unshare network + * namespaces, create veth, assign ip addresses, set routes, + * manipulate socket options, read network counter and etc. + * Author: Dmitry Safonov + */ +#ifndef _AOLIB_H_ +#define _AOLIB_H_ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "../../../../../include/linux/stringify.h" + +/* Working around ksft, see the comment in lib/setup.c */ +extern void __test_msg(const char *buf); +extern void __test_ok(const char *buf); +extern void __test_fail(const char *buf); +extern void __test_error(const char *buf); + +__attribute__((__format__(__printf__, 2, 3))) +static inline void __test_print(void (*fn)(const char *), const char *fmt, ...) +{ +#define TEST_MSG_BUFFER_SIZE 4096 + char buf[TEST_MSG_BUFFER_SIZE]; + va_list arg; + + va_start(arg, fmt); + vsnprintf(buf, sizeof(buf), fmt, arg); + va_end(arg); + fn(buf); +} + +#define test_print(fmt, ...) \ + __test_print(__test_msg, "%ld[%s:%u] " fmt "\n", \ + syscall(SYS_gettid), \ + __FILE__, __LINE__, ##__VA_ARGS__) + +#define test_ok(fmt, ...) \ + __test_print(__test_ok, fmt "\n", ##__VA_ARGS__) + +#define test_fail(fmt, ...) \ +do { \ + if (errno) \ + __test_print(__test_fail, fmt ": %m\n", ##__VA_ARGS__); \ + else \ + __test_print(__test_fail, fmt "\n", ##__VA_ARGS__); \ + test_failed(); \ +} while(0) + +#define KSFT_FAIL 1 +#define test_error(fmt, ...) \ +do { \ + if (errno) \ + __test_print(__test_error, "%ld[%s:%u] " fmt ": %m\n", \ + syscall(SYS_gettid), __FILE__, __LINE__, \ + ##__VA_ARGS__); \ + else \ + __test_print(__test_error, "%ld[%s:%u] " fmt "\n", \ + syscall(SYS_gettid), __FILE__, __LINE__, \ + ##__VA_ARGS__); \ + exit(KSFT_FAIL); \ +} while(0) + +union tcp_addr { + struct in_addr a4; + struct in6_addr a6; +}; + +typedef void *(*thread_fn)(void*); +extern void test_failed(void); +extern void __test_init(unsigned int ntests, int family, unsigned prefix, + union tcp_addr addr1, union tcp_addr addr2, + thread_fn peer1, thread_fn peer2); + +static inline void test_init2(unsigned int ntests, + thread_fn peer1, thread_fn peer2, + int family, unsigned prefix, + const char *addr1, const char *addr2) +{ + union tcp_addr taddr1, taddr2; + + if (inet_pton(family, addr1, &taddr1) != 1) + test_error("Can't convert ip address %s", addr1); + if (inet_pton(family, addr2, &taddr2) != 1) + test_error("Can't convert ip address %s", addr2); + + __test_init(ntests, family, prefix, taddr1, taddr2, peer1, peer2); +} +extern void test_add_destructor(void (*d)(void)); +extern void test_set_optmem(size_t value); + +extern const struct sockaddr_in6 addr_any6; +extern const struct sockaddr_in addr_any4; + +#ifdef IPV6_TEST +# define __TEST_CLIENT_IP(n) ("2001:db8:" __stringify(n) "::1") +# define TEST_CLIENT_IP __TEST_CLIENT_IP(1) +# define TEST_WRONG_IP "2001:db8:253::1" +# define TEST_SERVER_IP "2001:db8:254::1" +# define TEST_NETWORK "2001::" +# define TEST_PREFIX 128 +# define TEST_FAMILY AF_INET6 +# define SOCKADDR_ANY addr_any6 +#else +# define __TEST_CLIENT_IP(n) ("10.0." __stringify(n) ".1") +# define TEST_CLIENT_IP __TEST_CLIENT_IP(1) +# define TEST_WRONG_IP "10.0.253.1" +# define TEST_SERVER_IP "10.0.254.1" +# define TEST_NETWORK "10.0.0.0" +# define TEST_PREFIX 32 +# define TEST_FAMILY AF_INET +# define SOCKADDR_ANY addr_any4 +#endif + +static inline void test_init(unsigned int ntests, + thread_fn peer1, thread_fn peer2) +{ + test_init2(ntests, peer1, peer2, TEST_FAMILY, TEST_PREFIX, + TEST_SERVER_IP, TEST_CLIENT_IP); +} +extern void synchronize_threads(void); +extern void switch_ns(int fd); + +extern __thread union tcp_addr this_ip_addr; +extern __thread union tcp_addr this_ip_dest; +extern int test_family; + +extern void randomize_buffer(void *buf, size_t buflen); +extern const char veth_name[]; +extern int add_veth(const char *name, int nsfda, int nsfdb); +extern int ip_addr_add(const char *intf, int family, + union tcp_addr addr, uint8_t prefix); +extern int ip_route_add(const char *intf, int family, + union tcp_addr src, union tcp_addr dst); +extern int link_set_up(const char *intf); + +extern const unsigned test_server_port; +extern int test_wait_fd(int sk, time_t sec, bool write); +extern int __test_connect_socket(int sk, void *addr, size_t addr_sz, + time_t timeout); +extern int __test_listen_socket(int backlog, void *addr, size_t addr_sz); + +static inline int test_listen_socket(const union tcp_addr taddr, unsigned port, + int backlog) +{ +#ifdef IPV6_TEST + struct sockaddr_in6 addr = { + .sin6_family = AF_INET6, + .sin6_port = htons(port), + .sin6_addr = taddr.a6, + }; +#else + struct sockaddr_in addr = { + .sin_family = AF_INET, + .sin_port = htons(port), + .sin_addr = taddr.a4, + }; +#endif + return __test_listen_socket(backlog, (void *)&addr, sizeof(addr)); +} + +#ifndef DEFAULT_TEST_ALGO +#define DEFAULT_TEST_ALGO "cmac(aes128)" +#endif + +#ifdef IPV6_TEST +#define DEFAULT_TEST_PREFIX 128 +#else +#define DEFAULT_TEST_PREFIX 32 +#endif + +/* + * Timeout on syscalls where failure is not expected. + * You may want to rise it if the test machine is very busy. + */ +#ifndef TEST_TIMEOUT_SEC +#define TEST_TIMEOUT_SEC 5 +#endif + +/* + * Timeout on connect() where a failure is expected. + * If set to 0 - kernel will try to retransmit SYN number of times, set in + * /proc/sys/net/ipv4/tcp_syn_retries + * By default set to 1 to make tests pass faster on non-busy machine. + */ +#ifndef TEST_RETRANSMIT_SEC +#define TEST_RETRANSMIT_SEC 1 +#endif + + +static inline int _test_connect_socket(int sk, const union tcp_addr taddr, + unsigned port, time_t timeout) +{ +#ifdef IPV6_TEST + struct sockaddr_in6 addr = { + .sin6_family = AF_INET6, + .sin6_port = htons(port), + .sin6_addr = taddr.a6, + }; +#else + struct sockaddr_in addr = { + .sin_family = AF_INET, + .sin_port = htons(port), + .sin_addr = taddr.a4, + }; +#endif + return __test_connect_socket(sk, (void *)&addr, sizeof(addr), timeout); +} + +static inline int test_connect_socket(int sk, + const union tcp_addr taddr, unsigned port) +{ + return _test_connect_socket(sk, taddr, port, TEST_TIMEOUT_SEC); +} + +extern int test_prepare_ao_sockaddr(struct tcp_ao *ao, + const char *alg, uint16_t flags, + void *addr, size_t addr_sz, uint8_t prefix, + uint8_t sndid, uint8_t rcvid, uint8_t maclen, + uint8_t keyflags, uint8_t keylen, const char *key); + +static inline int test_prepare_ao(struct tcp_ao *ao, + const char *alg, uint16_t flags, + union tcp_addr in_addr, uint8_t prefix, + uint8_t sndid, uint8_t rcvid, uint8_t maclen, + uint8_t keyflags, uint8_t keylen, const char *key) +{ +#ifdef IPV6_TEST + struct sockaddr_in6 addr = { + .sin6_family = AF_INET6, + .sin6_port = 0, + .sin6_addr = in_addr.a6, + }; +#else + struct sockaddr_in addr = { + .sin_family = AF_INET, + .sin_port = 0, + .sin_addr = in_addr.a4, + }; +#endif + + return test_prepare_ao_sockaddr(ao, alg, flags, + (void *)&addr, sizeof(addr), prefix, sndid, rcvid, + maclen, keyflags, keylen, key); +} + +static inline int test_prepare_def_ao(struct tcp_ao *ao, + const char *key, uint16_t flags, + union tcp_addr in_addr, uint8_t prefix, + uint8_t sndid, uint8_t rcvid) +{ + if (prefix > DEFAULT_TEST_PREFIX) + prefix = DEFAULT_TEST_PREFIX; + + return test_prepare_ao(ao, DEFAULT_TEST_ALGO, flags, in_addr, + prefix, sndid, rcvid, 0, 0, strlen(key), key); +} + +extern int test_get_one_ao(int sk, struct tcp_ao_getsockopt *out, + uint16_t flags, void *addr, size_t addr_sz, + uint8_t prefix, uint8_t sndid, uint8_t rcvid); +extern int test_cmp_getsockopt_setsockopt(const struct tcp_ao *a, + const struct tcp_ao_getsockopt *b); + +static inline int test_verify_socket_ao(int sk, struct tcp_ao *ao) +{ + struct tcp_ao_getsockopt tmp; + int err; + + err = test_get_one_ao(sk, &tmp, 0, &ao->tcpa_addr, + sizeof(ao->tcpa_addr), ao->tcpa_prefix, + ao->tcpa_sndid, ao->tcpa_rcvid); + if (err) + return err; + + return test_cmp_getsockopt_setsockopt(ao, &tmp); +} + +static inline int test_set_ao(int sk, const char *key, uint16_t flags, + union tcp_addr in_addr, uint8_t prefix, + uint8_t sndid, uint8_t rcvid) +{ + struct tcp_ao tmp; + int err; + + err = test_prepare_def_ao(&tmp, key, flags, in_addr, + prefix, sndid, rcvid); + if (err) + return err; + + if (setsockopt(sk, IPPROTO_TCP, TCP_AO, &tmp, sizeof(tmp)) < 0) + return -errno; + + return test_verify_socket_ao(sk, &tmp); +} + +extern ssize_t test_server_run(int sk, ssize_t quota, time_t timeout_sec); +extern ssize_t test_client_loop(int sk, char *buf, size_t buf_sz, + const size_t msg_len, time_t timeout_sec); +extern int test_client_verify(int sk, const size_t msg_len, const size_t nr, + time_t timeout_sec); + +struct netstat; +extern struct netstat *netstat_read(void); +extern void netstat_free(struct netstat *ns); +extern void netstat_print_diff(struct netstat *nsa, struct netstat *nsb); +extern uint64_t netstat_get(struct netstat *ns, + const char *name, bool *not_found); + +static inline uint64_t netstat_get_one(const char *name, bool *not_found) +{ + struct netstat *ns = netstat_read(); + uint64_t ret; + + ret = netstat_get(ns, name, not_found); + + netstat_free(ns); + return ret; +} + +#endif /* _AOLIB_H_ */ diff --git a/tools/testing/selftests/net/tcp_ao/lib/netlink.c b/tools/testing/selftests/net/tcp_ao/lib/netlink.c new file mode 100644 index 000000000000..f04757c921d0 --- /dev/null +++ b/tools/testing/selftests/net/tcp_ao/lib/netlink.c @@ -0,0 +1,341 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Original from tools/testing/selftests/net/ipsec.c */ +#include +#include +#include +#include +#include +#include +#include +#include + +#include "aolib.h" + +#define MAX_PAYLOAD 2048 + +static int netlink_sock(int *sock, uint32_t *seq_nr, int proto) +{ + if (*sock > 0) { + seq_nr++; + return 0; + } + + *sock = socket(AF_NETLINK, SOCK_RAW | SOCK_CLOEXEC, proto); + if (*sock <= 0) { + test_print("socket(AF_NETLINK)"); + return -1; + } + + randomize_buffer(seq_nr, sizeof(*seq_nr)); + + return 0; +} + +static int netlink_check_answer(int sock, bool quite) +{ + struct nlmsgerror { + struct nlmsghdr hdr; + int error; + struct nlmsghdr orig_msg; + } answer; + + if (recv(sock, &answer, sizeof(answer), 0) < 0) { + test_print("recv()"); + return -1; + } else if (answer.hdr.nlmsg_type != NLMSG_ERROR) { + test_print("expected NLMSG_ERROR, got %d", + (int)answer.hdr.nlmsg_type); + return -1; + } else if (answer.error) { + if (!quite) { + test_print("NLMSG_ERROR: %d: %s", + answer.error, strerror(-answer.error)); + } + return answer.error; + } + + return 0; +} + +static inline struct rtattr *rtattr_hdr(struct nlmsghdr *nh) +{ + return (struct rtattr *)((char *)(nh) + RTA_ALIGN((nh)->nlmsg_len)); +} + +static int rtattr_pack(struct nlmsghdr *nh, size_t req_sz, + unsigned short rta_type, const void *payload, size_t size) +{ + /* NLMSG_ALIGNTO == RTA_ALIGNTO, nlmsg_len already aligned */ + struct rtattr *attr = rtattr_hdr(nh); + size_t nl_size = RTA_ALIGN(nh->nlmsg_len) + RTA_LENGTH(size); + + if (req_sz < nl_size) { + test_print("req buf is too small: %zu < %zu", req_sz, nl_size); + return -1; + } + nh->nlmsg_len = nl_size; + + attr->rta_len = RTA_LENGTH(size); + attr->rta_type = rta_type; + memcpy(RTA_DATA(attr), payload, size); + + return 0; +} + +static struct rtattr *_rtattr_begin(struct nlmsghdr *nh, size_t req_sz, + unsigned short rta_type, const void *payload, size_t size) +{ + struct rtattr *ret = rtattr_hdr(nh); + + if (rtattr_pack(nh, req_sz, rta_type, payload, size)) + return 0; + + return ret; +} + +static inline struct rtattr *rtattr_begin(struct nlmsghdr *nh, size_t req_sz, + unsigned short rta_type) +{ + return _rtattr_begin(nh, req_sz, rta_type, 0, 0); +} + +static inline void rtattr_end(struct nlmsghdr *nh, struct rtattr *attr) +{ + char *nlmsg_end = (char *)nh + nh->nlmsg_len; + + attr->rta_len = nlmsg_end - (char *)attr; +} + +static int veth_pack_peerb(struct nlmsghdr *nh, size_t req_sz, + const char *peer, int ns) +{ + struct ifinfomsg pi; + struct rtattr *peer_attr; + + memset(&pi, 0, sizeof(pi)); + pi.ifi_family = AF_UNSPEC; + pi.ifi_change = 0xFFFFFFFF; + + peer_attr = _rtattr_begin(nh, req_sz, VETH_INFO_PEER, &pi, sizeof(pi)); + if (!peer_attr) + return -1; + + if (rtattr_pack(nh, req_sz, IFLA_IFNAME, peer, strlen(peer))) + return -1; + + if (rtattr_pack(nh, req_sz, IFLA_NET_NS_FD, &ns, sizeof(ns))) + return -1; + + rtattr_end(nh, peer_attr); + + return 0; +} + +static int __add_veth(int sock, uint32_t seq, const char *name, + int ns_a, int ns_b) +{ + uint16_t flags = NLM_F_REQUEST | NLM_F_ACK | NLM_F_EXCL | NLM_F_CREATE; + struct { + struct nlmsghdr nh; + struct ifinfomsg info; + char attrbuf[MAX_PAYLOAD]; + } req; + const char veth_type[] = "veth"; + struct rtattr *link_info, *info_data; + + memset(&req, 0, sizeof(req)); + req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.info)); + req.nh.nlmsg_type = RTM_NEWLINK; + req.nh.nlmsg_flags = flags; + req.nh.nlmsg_seq = seq; + req.info.ifi_family = AF_UNSPEC; + req.info.ifi_change = 0xFFFFFFFF; + + if (rtattr_pack(&req.nh, sizeof(req), IFLA_IFNAME, name, strlen(name))) + return -1; + + if (rtattr_pack(&req.nh, sizeof(req), IFLA_NET_NS_FD, &ns_a, sizeof(ns_a))) + return -1; + + link_info = rtattr_begin(&req.nh, sizeof(req), IFLA_LINKINFO); + if (!link_info) + return -1; + + if (rtattr_pack(&req.nh, sizeof(req), IFLA_INFO_KIND, veth_type, sizeof(veth_type))) + return -1; + + info_data = rtattr_begin(&req.nh, sizeof(req), IFLA_INFO_DATA); + if (!info_data) + return -1; + + if (veth_pack_peerb(&req.nh, sizeof(req), name, ns_b)) + return -1; + + rtattr_end(&req.nh, info_data); + rtattr_end(&req.nh, link_info); + + if (send(sock, &req, req.nh.nlmsg_len, 0) < 0) { + test_print("send()"); + return -1; + } + return netlink_check_answer(sock, false); +} + +int add_veth(const char *name, int nsfda, int nsfdb) +{ + int route_sock = -1, ret; + uint32_t route_seq; + + if (netlink_sock(&route_sock, &route_seq, NETLINK_ROUTE)) + test_error("Failed to open netlink route socket\n"); + + ret = __add_veth(route_sock, route_seq++, name, nsfda, nsfdb); + close(route_sock); + return ret; +} + +static int __ip_addr_add(int sock, uint32_t seq, const char *intf, + int family, union tcp_addr addr, uint8_t prefix) +{ + uint16_t flags = NLM_F_REQUEST | NLM_F_ACK | NLM_F_EXCL | NLM_F_CREATE; + struct { + struct nlmsghdr nh; + struct ifaddrmsg info; + char attrbuf[MAX_PAYLOAD]; + } req; + size_t addr_len = (family == AF_INET) ? sizeof(struct in_addr) : + sizeof(struct in6_addr); + + memset(&req, 0, sizeof(req)); + req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.info)); + req.nh.nlmsg_type = RTM_NEWADDR; + req.nh.nlmsg_flags = flags; + req.nh.nlmsg_seq = seq; + req.info.ifa_family = family; + req.info.ifa_prefixlen = prefix; + req.info.ifa_index = if_nametoindex(intf); + req.info.ifa_flags = IFA_F_NODAD; + + if (rtattr_pack(&req.nh, sizeof(req), IFA_LOCAL, &addr, addr_len)) + return -1; + + if (send(sock, &req, req.nh.nlmsg_len, 0) < 0) { + test_print("send()"); + return -1; + } + return netlink_check_answer(sock, true); +} + +int ip_addr_add(const char *intf, int family, + union tcp_addr addr, uint8_t prefix) +{ + int route_sock = -1, ret; + uint32_t route_seq; + + if (netlink_sock(&route_sock, &route_seq, NETLINK_ROUTE)) + test_error("Failed to open netlink route socket\n"); + + ret = __ip_addr_add(route_sock, route_seq++, intf, + family, addr, prefix); + + close(route_sock); + return ret; +} + +static int __ip_route_add(int sock, uint32_t seq, const char *intf, int family, + union tcp_addr src, union tcp_addr dst) +{ + struct { + struct nlmsghdr nh; + struct rtmsg rt; + char attrbuf[MAX_PAYLOAD]; + } req; + unsigned int index = if_nametoindex(intf); + size_t addr_len = (family == AF_INET) ? sizeof(struct in_addr) : + sizeof(struct in6_addr); + + memset(&req, 0, sizeof(req)); + req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.rt)); + req.nh.nlmsg_type = RTM_NEWROUTE; + req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK | NLM_F_CREATE; + req.nh.nlmsg_seq = seq; + req.rt.rtm_family = family; + req.rt.rtm_dst_len = (family == AF_INET) ? 32 : 128; + req.rt.rtm_table = RT_TABLE_MAIN; + req.rt.rtm_protocol = RTPROT_BOOT; + req.rt.rtm_scope = RT_SCOPE_UNIVERSE; + req.rt.rtm_type = RTN_UNICAST; + + if (rtattr_pack(&req.nh, sizeof(req), RTA_DST, &dst, addr_len)) + return -1; + + if (rtattr_pack(&req.nh, sizeof(req), RTA_PREFSRC, &src, addr_len)) + return -1; + + if (rtattr_pack(&req.nh, sizeof(req), RTA_OIF, &index, sizeof(index))) + return -1; + + if (send(sock, &req, req.nh.nlmsg_len, 0) < 0) { + test_print("send()"); + return -1; + } + + return netlink_check_answer(sock, true); +} + +int ip_route_add(const char *intf, int family, + union tcp_addr src, union tcp_addr dst) +{ + int route_sock = -1, ret; + uint32_t route_seq; + + if (netlink_sock(&route_sock, &route_seq, NETLINK_ROUTE)) + test_error("Failed to open netlink route socket\n"); + + ret = __ip_route_add(route_sock, route_seq++, intf, family, src, dst); + if (ret == -EEXIST) /* ignoring */ + ret = 0; + + close(route_sock); + return ret; +} + +static int __link_set_up(int sock, uint32_t seq, const char *intf) +{ + struct { + struct nlmsghdr nh; + struct ifinfomsg info; + char attrbuf[MAX_PAYLOAD]; + } req; + + memset(&req, 0, sizeof(req)); + req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.info)); + req.nh.nlmsg_type = RTM_NEWLINK; + req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK; + req.nh.nlmsg_seq = seq; + req.info.ifi_family = AF_UNSPEC; + req.info.ifi_change = 0xFFFFFFFF; + req.info.ifi_index = if_nametoindex(intf); + req.info.ifi_flags = IFF_UP; + req.info.ifi_change = IFF_UP; + + if (send(sock, &req, req.nh.nlmsg_len, 0) < 0) { + test_print("send()"); + return -1; + } + return netlink_check_answer(sock, false); +} + +int link_set_up(const char *intf) +{ + int route_sock = -1, ret; + uint32_t route_seq; + + if (netlink_sock(&route_sock, &route_seq, NETLINK_ROUTE)) + test_error("Failed to open netlink route socket\n"); + + ret = __link_set_up(route_sock, route_seq++, intf); + + close(route_sock); + return ret; +} diff --git a/tools/testing/selftests/net/tcp_ao/lib/proc.c b/tools/testing/selftests/net/tcp_ao/lib/proc.c new file mode 100644 index 000000000000..815bb7b5975a --- /dev/null +++ b/tools/testing/selftests/net/tcp_ao/lib/proc.c @@ -0,0 +1,267 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include +#include +#include "../../../../../include/linux/compiler.h" +#include "../../../../../include/linux/kernel.h" +#include "aolib.h" + +struct netstat_counter { + uint64_t val; + char *name; +}; + +struct netstat { + char *header_name; + struct netstat *next; + size_t counters_nr; + struct netstat_counter *counters; +}; + +static struct netstat *lookup_type(struct netstat *ns, + const char *type, size_t len) +{ + while (ns != NULL) { + size_t cmp = max(len, strlen(ns->header_name)); + + if (!strncmp(ns->header_name, type, cmp)) + return ns; + ns = ns->next; + } + return NULL; +} + +static struct netstat *lookup_get(struct netstat *ns, + const char *type, const size_t len) +{ + struct netstat *ret; + + ret = lookup_type(ns, type, len); + if (ret != NULL) + return ret; + + ret = malloc(sizeof(struct netstat)); + if (!ret) + test_error("malloc()"); + + ret->header_name = strndup(type, len); + if (ret->header_name == NULL) + test_error("strndup()"); + ret->next = ns; + ret->counters_nr = 0; + ret->counters = NULL; + + return ret; +} + +static struct netstat *lookup_get_column(struct netstat *ns, const char *line) +{ + char *column; + + column = strchr(line, ':'); + if (!column) + test_error("can't parse netstat file"); + + return lookup_get(ns, line, column - line); +} + +static void netstat_read_type(FILE *fnetstat, struct netstat **dest, char *line) +{ + struct netstat *type = lookup_get_column(*dest, line); + const char *pos = line; + size_t i, nr_elems = 0; + char tmp; + + while ((pos = strchr(pos, ' '))) { + nr_elems++; + pos++; + } + + *dest = type; + type->counters = reallocarray(type->counters, + type->counters_nr + nr_elems, + sizeof(struct netstat_counter)); + if (!type->counters) + test_error("reallocarray()"); + + pos = strchr(line, ' ') + 1; + + if (fscanf(fnetstat, type->header_name) == EOF) + test_error("fscanf(%s)", type->header_name); + if (fread(&tmp, 1, 1, fnetstat) != 1 || tmp != ':') + test_error("Unexpected netstat format (%c)", tmp); + + for (i = type->counters_nr; i < type->counters_nr + nr_elems; i++) { + struct netstat_counter *nc = &type->counters[i]; + const char *new_pos = strchr(pos, ' '); + const char *fmt = " %" PRIu64; + + if (new_pos == NULL) + new_pos = strchr(pos, '\n'); + + nc->name = strndup(pos, new_pos - pos); + if (nc->name == NULL) + test_error("strndup()"); + + if (unlikely(!strcmp(nc->name, "MaxConn"))) + fmt = " %" PRId64; /* MaxConn is signed, RFC 2012 */ + if (fscanf(fnetstat, fmt, &nc->val) != 1) + test_error("fscanf(%s)", nc->name); + pos = new_pos + 1; + } + type->counters_nr += nr_elems; + + if (fread(&tmp, 1, 1, fnetstat) != 1 || tmp != '\n') + test_error("Unexpected netstat format"); +} + +static const char *snmp6_name = "Snmp6"; +static void snmp6_read(FILE *fnetstat, struct netstat **dest) +{ + struct netstat *type = lookup_get(*dest, snmp6_name, strlen(snmp6_name)); + char *counter_name; + size_t i; + + for (i = type->counters_nr;; i++) { + struct netstat_counter *nc; + uint64_t counter; + + if (fscanf(fnetstat, "%ms", &counter_name) == EOF) + break; + if (fscanf(fnetstat, "%" PRIu64, &counter) == EOF) + test_error("Unexpected snmp6 format"); + type->counters = reallocarray(type->counters, i + 1, + sizeof(struct netstat_counter)); + if (!type->counters) + test_error("reallocarray()"); + nc = &type->counters[i]; + nc->name = counter_name; + nc->val = counter; + } + type->counters_nr = i; + *dest = type; +} + +struct netstat *netstat_read(void) +{ + struct netstat *ret = 0; + size_t line_sz = 0; + char *line = NULL; + FILE *fnetstat; + + errno = 0; + fnetstat = fopen("/proc/net/netstat", "r"); + if (fnetstat == NULL) + test_error("failed to open /proc/net/netstat"); + + while (getline(&line, &line_sz, fnetstat) != -1) + netstat_read_type(fnetstat, &ret, line); + fclose(fnetstat); + + errno = 0; + fnetstat = fopen("/proc/net/snmp", "r"); + if (fnetstat == NULL) + test_error("failed to open /proc/net/snmp"); + + while (getline(&line, &line_sz, fnetstat) != -1) + netstat_read_type(fnetstat, &ret, line); + fclose(fnetstat); + + errno = 0; + fnetstat = fopen("/proc/net/snmp6", "r"); + if (fnetstat == NULL) + test_error("failed to open /proc/net/snmp6"); + + snmp6_read(fnetstat, &ret); + fclose(fnetstat); + + free(line); + return ret; +} + +void netstat_free(struct netstat *ns) +{ + while (ns != NULL) { + struct netstat *prev = ns; + size_t i; + + free(ns->header_name); + for (i = 0; i < ns->counters_nr; i++) + free(ns->counters[i].name); + free(ns->counters); + ns = ns->next; + free(prev); + } +} + +static void inline +__netstat_print_diff(uint64_t a, struct netstat *nsb, size_t i) +{ + if (unlikely(!strcmp(nsb->header_name, "MaxConn"))) { + test_print("%8s %25s: %" PRId64 " => %" PRId64, + nsb->header_name, nsb->counters[i].name, + a, nsb->counters[i].val); + return; + } + + test_print("%8s %25s: %" PRIu64 " => %" PRIu64, nsb->header_name, + nsb->counters[i].name, a, nsb->counters[i].val); +} + +void netstat_print_diff(struct netstat *nsa, struct netstat *nsb) +{ + size_t i, j; + + while (nsb != NULL) { + if (unlikely(strcmp(nsb->header_name, nsa->header_name))) { + for (i = 0; i < nsb->counters_nr; i++) + __netstat_print_diff(0, nsb, i); + nsb = nsb->next; + continue; + } + + if (nsb->counters_nr < nsa->counters_nr) + test_error("Unexpected: some counters dissapeared!"); + + for (j = 0, i = 0; i < nsb->counters_nr; i++) { + if (strcmp(nsb->counters[i].name, nsa->counters[j].name)) { + __netstat_print_diff(0, nsb, i); + continue; + } + + if (nsa->counters[j].val == nsb->counters[i].val) { + j++; + continue; + } + + __netstat_print_diff(nsa->counters[j].val, nsb, i); + j++; + } + if (j != nsa->counters_nr) + test_error("Unexpected: some counters dissapeared!"); + + nsb = nsb->next; + nsa = nsa->next; + } +} + +uint64_t netstat_get(struct netstat *ns, const char *name, bool *not_found) +{ + if (not_found) + *not_found = false; + + while (ns != NULL) { + size_t i; + + for (i = 0; i < ns->counters_nr; i++) { + if (!strcmp(name, ns->counters[i].name)) + return ns->counters[i].val; + } + + ns = ns->next; + } + + if (not_found) + *not_found = true; + return 0; +} diff --git a/tools/testing/selftests/net/tcp_ao/lib/setup.c b/tools/testing/selftests/net/tcp_ao/lib/setup.c new file mode 100644 index 000000000000..b47672a2a5c0 --- /dev/null +++ b/tools/testing/selftests/net/tcp_ao/lib/setup.c @@ -0,0 +1,297 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include +#include +#include +#include "aolib.h" + +/* + * Can't be included in the header: it defines static variables which + * will be unique to every object. Let's include it only once here. + */ +#include "../../../kselftest.h" + +/* Prevent overriding of one thread's output by another */ +static pthread_mutex_t ksft_print_lock = PTHREAD_MUTEX_INITIALIZER; + +void __test_msg(const char *buf) +{ + pthread_mutex_lock(&ksft_print_lock); + ksft_print_msg(buf); + pthread_mutex_unlock(&ksft_print_lock); +} +void __test_ok(const char *buf) +{ + pthread_mutex_lock(&ksft_print_lock); + ksft_test_result_pass(buf); + pthread_mutex_unlock(&ksft_print_lock); +} +void __test_fail(const char *buf) +{ + pthread_mutex_lock(&ksft_print_lock); + ksft_test_result_fail(buf); + pthread_mutex_unlock(&ksft_print_lock); +} + +void __test_error(const char *buf) +{ + pthread_mutex_lock(&ksft_print_lock); + ksft_test_result_error(buf); + pthread_mutex_unlock(&ksft_print_lock); +} + +static volatile int failed; + +void test_failed(void) +{ + failed = 1; +} + +static void test_exit(void) +{ + if (failed) + ksft_exit_fail(); + else + ksft_exit_pass(); +} + +struct dlist_t { + void (*destruct)(void); + struct dlist_t *next; +}; +static struct dlist_t *destructors_list; + +void test_add_destructor(void (*d)(void)) +{ + struct dlist_t *p; + + p = malloc(sizeof(struct dlist_t)); + if (p == NULL) + test_error("malloc() failed"); + + p->next = destructors_list; + p->destruct = d; + destructors_list = p; +} + +static void test_destructor(void) __attribute__((destructor)); +static void test_destructor(void) +{ + while (destructors_list) { + struct dlist_t *p = destructors_list->next; + + destructors_list->destruct(); + free(destructors_list); + destructors_list = p; + } + test_exit(); +} + +static void sig_int(int signo) +{ + test_error("Caught SIGINT - exiting"); +} + +static int open_netns(void) +{ + const char *netns_path = "/proc/self/ns/net"; + int fd; + + fd = open(netns_path, O_RDONLY); + if (fd <= 0) + test_error("open(%s)", netns_path); + return fd; +} + +static int unshare_open(void) +{ + if (unshare(CLONE_NEWNET) != 0) + test_error("unshare()"); + + return open_netns(); +} + +void switch_ns(int fd) +{ + if (setns(fd, CLONE_NEWNET)) + test_error("setns()"); +} + +int switch_save_ns(int new_ns) +{ + int ret = open_netns(); + + switch_ns(new_ns); + return ret; +} + +static int nsfd_outside = -1; +static int nsfd_parent = -1; +static int nsfd_child = -1; +const char veth_name[] = "ktst-veth"; + +static void init_namespaces(void) +{ + nsfd_outside = open_netns(); + nsfd_parent = unshare_open(); + nsfd_child = unshare_open(); +} + +static void link_init(const char *veth, int family, uint8_t prefix, + union tcp_addr addr, union tcp_addr dest) +{ + if (link_set_up(veth)) + test_error("Failed to set link up"); + if (ip_addr_add(veth, family, addr, prefix)) + test_error("Failed to add ip address"); + if (ip_route_add(veth, family, addr, dest)) + test_error("Failed to add route"); +} + +static unsigned nr_threads = 1; + +static pthread_mutex_t sync_lock = PTHREAD_MUTEX_INITIALIZER; +static pthread_cond_t sync_cond = PTHREAD_COND_INITIALIZER; +static volatile unsigned stage_threads[2]; +static volatile unsigned stage_nr; + +/* synchronize all threads in the same stage */ +void synchronize_threads(void) +{ + unsigned q = stage_nr; + + pthread_mutex_lock(&sync_lock); + stage_threads[q]++; + if (stage_threads[q] == nr_threads) { + stage_nr ^= 1; + stage_threads[stage_nr] = 0; + pthread_cond_signal(&sync_cond); + } + while (stage_threads[q] < nr_threads) + pthread_cond_wait(&sync_cond, &sync_lock); + pthread_mutex_unlock(&sync_lock); +} + +__thread union tcp_addr this_ip_addr; +__thread union tcp_addr this_ip_dest; +int test_family; + +struct new_pthread_arg { + thread_fn func; + union tcp_addr my_ip; + union tcp_addr dest_ip; +}; +static void *new_pthread_entry(void *arg) +{ + struct new_pthread_arg *p = arg; + + this_ip_addr = p->my_ip; + this_ip_dest = p->dest_ip; + p->func(NULL); /* shouldn't return */ + exit(KSFT_FAIL); +} + +void __test_init(unsigned int ntests, int family, unsigned prefix, + union tcp_addr addr1, union tcp_addr addr2, + thread_fn peer1, thread_fn peer2) +{ + struct sigaction sa = { + .sa_handler = sig_int, + .sa_flags = SA_RESTART, + }; + time_t seed = time(NULL); + + test_family = family; + ksft_set_plan(ntests); + + test_print("rand seed %u", (unsigned int)seed); + srand(seed); + + sigemptyset(&sa.sa_mask); + if (sigaction(SIGINT, &sa, NULL)) + test_error("Can't set SIGINT handler"); + + ksft_print_header(); + init_namespaces(); + + if (add_veth(veth_name, nsfd_parent, nsfd_child)) + test_error("Failed to add veth"); + + switch_ns(nsfd_child); + link_init(veth_name, family, prefix, addr2, addr1); + if (peer2) { + struct new_pthread_arg targ; + pthread_t t; + + targ.my_ip = addr2; + targ.dest_ip = addr1; + targ.func = peer2; + nr_threads++; + if (pthread_create(&t, NULL, new_pthread_entry, &targ)) + test_error("Failed to create pthread"); + } + switch_ns(nsfd_parent); + link_init(veth_name, family, prefix, addr1, addr2); + + this_ip_addr = addr1; + this_ip_dest = addr2; + peer1(NULL); + if (failed) + exit(KSFT_FAIL); + else + exit(KSFT_PASS); +} + +/* /proc/sys/net/core/optmem_max artifically limits the amount of memory + * that can be allocated with sock_kmalloc() on each socket in the system. + * It is not virtualized, so it has to written outside test namespaces. + * To be nice a test will revert optmem back to the old value. + * Keeping it simple without any file lock, which means the tests that + * need to set/increase optmem value shouldn't run in parallel. + * Also, not re-entrant. + */ +static const char *optmem_file = "/proc/sys/net/core/optmem_max"; +static size_t saved_optmem; + +static void __test_set_optmem(size_t new, size_t *old) +{ + FILE *foptmem; + int old_ns; + + old_ns = switch_save_ns(nsfd_outside); + foptmem = fopen(optmem_file, "r+"); + if (!foptmem) + test_error("failed to open %s", optmem_file); + + if (old != NULL) { + if (fscanf(foptmem, "%zu", old) != 1) + test_error("can't read from %s", optmem_file); + fclose(foptmem); + foptmem = fopen(optmem_file, "w"); + if (!foptmem) + test_error("failed to open %s", optmem_file); + } + + if (fprintf(foptmem, "%zu", new) <= 0) + test_error("can't write %zu to %s", new, optmem_file); + fclose(foptmem); + switch_ns(old_ns); +} + +static void test_revert_optmem(void) +{ + if (saved_optmem == 0) + return; + + __test_set_optmem(saved_optmem, NULL); +} + +void test_set_optmem(size_t value) +{ + if (saved_optmem == 0) { + __test_set_optmem(value, &saved_optmem); + test_add_destructor(test_revert_optmem); + } else { + __test_set_optmem(value, NULL); + } +} diff --git a/tools/testing/selftests/net/tcp_ao/lib/sock.c b/tools/testing/selftests/net/tcp_ao/lib/sock.c new file mode 100644 index 000000000000..c0b0ac77b644 --- /dev/null +++ b/tools/testing/selftests/net/tcp_ao/lib/sock.c @@ -0,0 +1,294 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include +#include +#include "../../../../../include/linux/kernel.h" +#include "../../../../../include/linux/stringify.h" +#include "aolib.h" + +const unsigned test_server_port = 7010; +int __test_listen_socket(int backlog, void *addr, size_t addr_sz) +{ + int err, sk = socket(test_family, SOCK_STREAM, IPPROTO_TCP); + long flags; + + if (sk < 0) + test_error("socket()"); + + err = setsockopt(sk, SOL_SOCKET, SO_BINDTODEVICE, veth_name, + strlen(veth_name) + 1); + if (err < 0) + test_error("setsockopt(SO_BINDTODEVICE)"); + + if (bind(sk, (struct sockaddr *)addr, addr_sz) < 0) + test_error("bind()"); + + flags = fcntl(sk, F_GETFL); + if ((flags < 0) || (fcntl(sk, F_SETFL, flags | O_NONBLOCK) < 0)) + test_error("fcntl()"); + + if (listen(sk, backlog)) + test_error("listen()"); + + return sk; +} + +int test_wait_fd(int sk, time_t sec, bool write) +{ + struct timeval tv = { .tv_sec = sec }; + struct timeval *ptv = NULL; + fd_set fds, efds; + int ret; + socklen_t slen = sizeof(ret); + + FD_ZERO(&fds); + FD_SET(sk, &fds); + FD_ZERO(&efds); + FD_SET(sk, &efds); + + if (sec) + ptv = &tv; + + errno = 0; + if (write) + ret = select(sk + 1, NULL, &fds, &efds, ptv); + else + ret = select(sk + 1, &fds, NULL, &efds, ptv); + if (ret <= 0) + return -errno; + + if (getsockopt(sk, SOL_SOCKET, SO_ERROR, &ret, &slen) || ret) + return -ret; + return sk; +} + +int __test_connect_socket(int sk, void *addr, size_t addr_sz, time_t timeout) +{ + long flags; + int err; + + err = setsockopt(sk, SOL_SOCKET, SO_BINDTODEVICE, veth_name, + strlen(veth_name) + 1); + if (err < 0) + test_error("setsockopt(SO_BINDTODEVICE)"); + + if (!timeout) { + err = connect(sk, addr, addr_sz); + if (err) { + err = -errno; + goto out; + } + return 0; + } + + flags = fcntl(sk, F_GETFL); + if ((flags < 0) || (fcntl(sk, F_SETFL, flags | O_NONBLOCK) < 0)) + test_error("fcntl()"); + + if (connect(sk, addr, addr_sz) < 0) { + if (errno != EINPROGRESS) { + err = -errno; + goto out; + } + err = test_wait_fd(sk, timeout, 1); + if (err <= 0) + goto out; + } + return sk; + +out: + close(sk); + return err; +} + +int test_prepare_ao_sockaddr(struct tcp_ao *ao, const char *alg, uint16_t flags, + void *addr, size_t addr_sz, uint8_t prefix, + uint8_t sndid, uint8_t rcvid, uint8_t maclen, + uint8_t keyflags, uint8_t keylen, const char *key) +{ + memset(ao, 0, sizeof(struct tcp_ao)); + + ao->tcpa_flags = flags; + ao->tcpa_prefix = prefix; + ao->tcpa_sndid = sndid; + ao->tcpa_rcvid = rcvid; + ao->tcpa_maclen = maclen; + ao->tcpa_keyflags = keyflags; + ao->tcpa_keylen = keylen; + + memcpy(&ao->tcpa_addr, addr, addr_sz); + + if (strlen(alg) > 64) + return -ENOBUFS; + strncpy(ao->tcpa_alg_name, alg, 64); + + memcpy(ao->tcpa_key, key, + (TCP_AO_MAXKEYLEN < keylen) ? TCP_AO_MAXKEYLEN : keylen); + return 0; +} + +int test_get_one_ao(int sk, struct tcp_ao_getsockopt *out, uint16_t flags, + void *addr, size_t addr_sz, uint8_t prefix, + uint8_t sndid, uint8_t rcvid) +{ + struct tcp_ao_getsockopt tmp = {}; + socklen_t tmp_sz = sizeof(tmp); + int ret; + + memcpy(&tmp.addr, addr, addr_sz); + tmp.prefix = prefix; + tmp.sndid = sndid; + tmp.rcvid = rcvid; + tmp.flags = flags; + tmp.nkeys = 1; + + ret = getsockopt(sk, IPPROTO_TCP, TCP_AO_GET, &tmp, &tmp_sz); + if (ret) + return ret; + if (tmp.nkeys != 1) + return -ENOENT; + *out = tmp; + return 0; +} + +int test_cmp_getsockopt_setsockopt(const struct tcp_ao *a, + const struct tcp_ao_getsockopt *b) +{ + bool is_kdf_aes_128_cmac = false; + + if (!strcmp("cmac(aes128)", a->tcpa_alg_name)) + is_kdf_aes_128_cmac = (a->tcpa_keylen != 16); + +#define __cmp_ao(member) \ + if (b->member != a->tcpa_##member) { \ + test_fail("getsockopt(): " __stringify(member) " %u != %u", \ + b->member, a->tcpa_##member); \ + return -1; \ + } + __cmp_ao(sndid); + __cmp_ao(rcvid); + __cmp_ao(prefix); + __cmp_ao(keyflags); + if (a->tcpa_maclen) { + __cmp_ao(maclen); + } else if (b->maclen != 12) { + test_fail("getsockopt(): expected default maclen 12, but it's %u", + b->maclen); + return -1; + } + if (!is_kdf_aes_128_cmac) { + __cmp_ao(keylen); + } else if (b->keylen != 16) { + test_fail("getsockopt(): expected keylen 16 for cmac(aes128), but it's %u", + b->keylen); + return -1; + } +#undef __cmp_ao + if (!is_kdf_aes_128_cmac && memcmp(b->key, a->tcpa_key, a->tcpa_keylen)) { + test_fail("getsockopt(): returned key is different `%s' != `%s'", + b->key, a->tcpa_key); + return -1; + } + if (memcmp(&b->addr, &a->tcpa_addr, sizeof(b->addr))) { + test_fail("getsockopt(): returned address is different"); + return -1; + } + if (!is_kdf_aes_128_cmac && strcmp(b->alg_name, a->tcpa_alg_name)) { + test_fail("getsockopt(): returned algorithm is different"); + return -1; + } + if (is_kdf_aes_128_cmac && strcmp(b->alg_name, "cmac(aes)")) { + test_fail("getsockopt(): returned algorithm is different"); + return -1; + } + return 0; +} + +#define TEST_BUF_SIZE 4096 +ssize_t test_server_run(int sk, ssize_t quota, time_t timeout_sec) +{ + ssize_t total = 0; + + do { + char buf[TEST_BUF_SIZE]; + ssize_t bytes, sent; + int ret; + + ret = test_wait_fd(sk, timeout_sec, 0); + if (ret <= 0) + return ret; + + bytes = recv(sk, buf, sizeof(buf), 0); + + if (bytes < 0) + test_error("recv(): %zd", bytes); + if (bytes == 0) + break; + + ret = test_wait_fd(sk, timeout_sec, 1); + if (ret <= 0) + return ret; + + sent = send(sk, buf, bytes, 0); + if (sent == 0) + break; + if (sent != bytes) + test_error("send()"); + total += bytes; + } while (!quota || total < quota); + + return total; +} + +ssize_t test_client_loop(int sk, char *buf, size_t buf_sz, + const size_t msg_len, time_t timeout_sec) +{ + char msg[msg_len]; + int nodelay = 1; + size_t i; + + if (setsockopt(sk, IPPROTO_TCP, TCP_NODELAY, &nodelay, sizeof(nodelay))) + test_error("setsockopt(TCP_NODELAY)"); + + for (i = 0; i < buf_sz; i += min(msg_len, buf_sz - i)) { + size_t sent, bytes = min(msg_len, buf_sz - i); + int ret; + + ret = test_wait_fd(sk, timeout_sec, 1); + if (ret <= 0) + return ret; + + sent = send(sk, buf + i, bytes, 0); + if (sent == 0) + break; + if (sent != bytes) + test_error("send()"); + + ret = test_wait_fd(sk, timeout_sec, 0); + if (ret <= 0) + return ret; + + bytes = recv(sk, msg, sizeof(msg), 0); + if (bytes < 0) + test_error("recv(): %zd", bytes); + if (bytes != sent) + test_error("recv(): %zd != %zd", bytes, sent); + if (memcmp(buf + i, msg, bytes) != 0) { + test_fail("received message differs"); + return -1; + } + } + return i; +} + +int test_client_verify(int sk, const size_t msg_len, const size_t nr, + time_t timeout_sec) +{ + size_t buf_sz = msg_len * nr; + char *buf = alloca(buf_sz); + + randomize_buffer(buf, buf_sz); + if (test_client_loop(sk, buf, buf_sz, msg_len, timeout_sec) != buf_sz) + return -1; + return 0; +} diff --git a/tools/testing/selftests/net/tcp_ao/lib/utils.c b/tools/testing/selftests/net/tcp_ao/lib/utils.c new file mode 100644 index 000000000000..372daca525f5 --- /dev/null +++ b/tools/testing/selftests/net/tcp_ao/lib/utils.c @@ -0,0 +1,30 @@ +// SPDX-License-Identifier: GPL-2.0 +#include "aolib.h" +#include + +void randomize_buffer(void *buf, size_t buflen) +{ + int *p = (int *)buf; + size_t words = buflen / sizeof(int); + size_t leftover = buflen % sizeof(int); + + if (!buflen) + return; + + while (words--) + *p++ = rand(); + + if (leftover) { + int tmp = rand(); + + memcpy(buf + buflen - leftover, &tmp, leftover); + } +} + +const struct sockaddr_in6 addr_any6 = { + .sin6_family = AF_INET6, +}; + +const struct sockaddr_in addr_any4 = { + .sin_family = AF_INET, +};