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Fri, 19 Oct 2018 17:56:51 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by zimbra.sommerseth.email (Postfix) with ESMTP id 15F1E51E21D9; Fri, 19 Oct 2018 17:56:51 +0200 (CEST) Received: from zimbra.sommerseth.email ([127.0.0.1]) by localhost (zimbra.sommerseth.email [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id HYrkRkroPmio; Fri, 19 Oct 2018 17:56:50 +0200 (CEST) Received: from optimus.homebase.sommerseths.net (unknown [10.35.7.3]) by zimbra.sommerseth.email (Postfix) with ESMTPS id CBC4751E21D8; Fri, 19 Oct 2018 17:56:50 +0200 (CEST) From: David Sommerseth To: openvpn-devel@lists.sourceforge.net Date: Fri, 19 Oct 2018 17:56:36 +0200 Message-Id: <20181019155638.9498-3-davids@openvpn.net> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20181019155638.9498-1-davids@openvpn.net> References: <20181019155638.9498-1-davids@openvpn.net> X-Spam-Report: Spam Filtering performed by mx.sourceforge.net. See http://spamassassin.org/tag/ for more details. -0.0 SPF_HELO_PASS SPF: HELO matches SPF record 0.2 HEADER_FROM_DIFFERENT_DOMAINS From and EnvelopeFrom 2nd level mail domains are different -0.0 SPF_PASS SPF: sender matches SPF record 0.0 AWL AWL: Adjusted score from AWL reputation of From: address X-Headers-End: 1gDX9G-0057CY-SH Subject: [Openvpn-devel] [PATCH 2/4] argv: do fewer memory re-allocations X-BeenThere: openvpn-devel@lists.sourceforge.net X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: openvpn-devel-bounces@lists.sourceforge.net X-getmail-retrieved-from-mailbox: Inbox From: Heiko Hund Prevent the re-allocations of memory when the internal argv grows beyond 2 and 4 arguments by initially allocating argv to hold up to 7 (+ trailing NULL) pointers. While at it rename argv_reset to argv_free to actually express what's going on. Redo the argv_reset functionality so that it can be used to actually reset the argv without re-allocation. Signed-off-by: Heiko Hund --- src/openvpn/argv.c | 81 ++++++++++++++-------------- src/openvpn/argv.h | 2 +- src/openvpn/console_systemd.c | 2 +- src/openvpn/init.c | 15 ++---- src/openvpn/lladdr.c | 2 +- src/openvpn/multi.c | 10 ++-- src/openvpn/options.c | 2 +- src/openvpn/plugin.c | 2 +- src/openvpn/route.c | 8 +-- src/openvpn/socket.c | 4 +- src/openvpn/ssl_verify.c | 6 +-- src/openvpn/tun.c | 38 ++++++------- tests/unit_tests/openvpn/test_argv.c | 41 +++++++++----- 13 files changed, 110 insertions(+), 103 deletions(-) diff --git a/src/openvpn/argv.c b/src/openvpn/argv.c index 9606f382..ff6d0b46 100644 --- a/src/openvpn/argv.c +++ b/src/openvpn/argv.c @@ -40,34 +40,6 @@ #include "env_set.h" #include "options.h" -static void -argv_init(struct argv *a) -{ - a->capacity = 0; - a->argc = 0; - a->argv = NULL; -} - -struct argv -argv_new(void) -{ - struct argv ret; - argv_init(&ret); - return ret; -} - -void -argv_reset(struct argv *a) -{ - size_t i; - for (i = 0; i < a->argc; ++i) - { - free(a->argv[i]); - } - free(a->argv); - argv_init(a); -} - static void argv_extend(struct argv *a, const size_t newcap) { @@ -86,6 +58,46 @@ argv_extend(struct argv *a, const size_t newcap) } } +static void +argv_init(struct argv *a) +{ + a->capacity = 0; + a->argc = 0; + a->argv = NULL; + argv_extend(a, 8); +} + +struct argv +argv_new(void) +{ + struct argv ret; + argv_init(&ret); + return ret; +} + +void +argv_free(struct argv *a) +{ + size_t i; + for (i = 0; i < a->argc; ++i) + { + free(a->argv[i]); + } + free(a->argv); +} + +static void +argv_reset(struct argv *a) +{ + size_t i; + for (i = 0; i < a->argc; ++i) + { + free(a->argv[i]); + a->argv[i] = NULL; + } + a->argc = 0; +} + static void argv_grow(struct argv *a, const size_t add) { @@ -134,14 +146,7 @@ argv_insert_head(const struct argv *a, const char *head) const char * argv_str(const struct argv *a, struct gc_arena *gc, const unsigned int flags) { - if (a->argv) - { - return print_argv((const char **)a->argv, gc, flags); - } - else - { - return ""; - } + return print_argv((const char **)a->argv, gc, flags); } void @@ -229,8 +234,6 @@ argv_printf_arglist(struct argv *a, const char *format, va_list arglist) va_list tmplist; int len; - argv_extend(a, 1); /* ensure trailing NULL */ - argc = a->argc; f = argv_prep_format(format, delim, &argc, &gc); if (f == NULL) @@ -270,7 +273,6 @@ argv_printf_arglist(struct argv *a, const char *format, va_list arglist) { /* Someone snuck in a GS (0x1D), fail gracefully */ argv_reset(a); - argv_extend(a, 1); /* ensure trailing NULL */ goto out; } @@ -315,7 +317,6 @@ argv_parse_cmd(struct argv *a, const char *s) struct gc_arena gc = gc_new(); argv_reset(a); - argv_extend(a, 1); /* ensure trailing NULL */ nparms = parse_line(s, parms, MAX_PARMS, "SCRIPT-ARGV", 0, D_ARGV_PARSE_CMD, &gc); if (nparms) diff --git a/src/openvpn/argv.h b/src/openvpn/argv.h index b9105a43..989cd297 100644 --- a/src/openvpn/argv.h +++ b/src/openvpn/argv.h @@ -40,7 +40,7 @@ struct argv { struct argv argv_new(void); -void argv_reset(struct argv *a); +void argv_free(struct argv *a); const char *argv_str(const struct argv *a, struct gc_arena *gc, const unsigned int flags); diff --git a/src/openvpn/console_systemd.c b/src/openvpn/console_systemd.c index 8d9e825b..c7cf1ada 100644 --- a/src/openvpn/console_systemd.c +++ b/src/openvpn/console_systemd.c @@ -85,7 +85,7 @@ get_console_input_systemd(const char *prompt, const bool echo, char *input, cons } close(std_out); - argv_reset(&argv); + argv_free(&argv); return ret; } diff --git a/src/openvpn/init.c b/src/openvpn/init.c index e5e6e85f..7dab4f21 100644 --- a/src/openvpn/init.c +++ b/src/openvpn/init.c @@ -163,7 +163,7 @@ run_up_down(const char *command, msg(M_FATAL, "ERROR: up/down plugin call failed"); } - argv_reset(&argv); + argv_free(&argv); } if (command) @@ -176,7 +176,7 @@ run_up_down(const char *command, ifconfig_local, ifconfig_remote, context); argv_msg(M_INFO, &argv); openvpn_run_script(&argv, es, S_FATAL, "--up/--down"); - argv_reset(&argv); + argv_free(&argv); } gc_free(&gc); @@ -844,15 +844,6 @@ init_static(void) return false; #endif -#ifdef ARGV_TEST - { - void argv_test(void); - - argv_test(); - return false; - } -#endif - #ifdef PRNG_TEST { struct gc_arena gc = gc_new(); @@ -1639,7 +1630,7 @@ do_route(const struct options *options, setenv_str(es, "script_type", "route-up"); argv_parse_cmd(&argv, options->route_script); openvpn_run_script(&argv, es, 0, "--route-up"); - argv_reset(&argv); + argv_free(&argv); } #ifdef _WIN32 diff --git a/src/openvpn/lladdr.c b/src/openvpn/lladdr.c index e6b26fc9..22857eb7 100644 --- a/src/openvpn/lladdr.c +++ b/src/openvpn/lladdr.c @@ -69,6 +69,6 @@ set_lladdr(const char *ifname, const char *lladdr, msg(M_INFO, "TUN/TAP link layer address set to %s", lladdr); } - argv_reset(&argv); + argv_free(&argv); return r; } diff --git a/src/openvpn/multi.c b/src/openvpn/multi.c index 8440f311..c8c04f00 100644 --- a/src/openvpn/multi.c +++ b/src/openvpn/multi.c @@ -138,7 +138,7 @@ learn_address_script(const struct multi_context *m, msg(M_WARN, "WARNING: learn-address plugin call failed"); ret = false; } - argv_reset(&argv); + argv_free(&argv); } if (m->top.options.learn_address_script) @@ -155,7 +155,7 @@ learn_address_script(const struct multi_context *m, { ret = false; } - argv_reset(&argv); + argv_free(&argv); } gc_free(&gc); @@ -593,7 +593,7 @@ multi_client_disconnect_script(struct multi_context *m, setenv_str(mi->context.c2.es, "script_type", "client-disconnect"); argv_parse_cmd(&argv, mi->context.options.client_disconnect_script); openvpn_run_script(&argv, mi->context.c2.es, 0, "--client-disconnect"); - argv_reset(&argv); + argv_free(&argv); } #ifdef MANAGEMENT_DEF_AUTH if (management) @@ -1908,7 +1908,7 @@ multi_connection_established(struct multi_context *m, struct multi_instance *mi) } script_depr_failed: - argv_reset(&argv); + argv_free(&argv); } /* V2 callback, use a plugin_return struct for passing back return info */ @@ -1971,7 +1971,7 @@ script_depr_failed: } script_failed: - argv_reset(&argv); + argv_free(&argv); } /* diff --git a/src/openvpn/options.c b/src/openvpn/options.c index 5c669e91..e4aa9a11 100644 --- a/src/openvpn/options.c +++ b/src/openvpn/options.c @@ -3228,7 +3228,7 @@ check_cmd_access(const char *command, const char *opt, const char *chroot) return_code = true; } - argv_reset(&argv); + argv_free(&argv); return return_code; } diff --git a/src/openvpn/plugin.c b/src/openvpn/plugin.c index 4d17c821..09424c61 100644 --- a/src/openvpn/plugin.c +++ b/src/openvpn/plugin.c @@ -587,7 +587,7 @@ plugin_call_item(const struct plugin *p, p->so_pathname); } - argv_reset(&a); + argv_free(&a); gc_free(&gc); } return status; diff --git a/src/openvpn/route.c b/src/openvpn/route.c index 9649d197..cbee7a20 100644 --- a/src/openvpn/route.c +++ b/src/openvpn/route.c @@ -1815,7 +1815,7 @@ done: { r->flags &= ~RT_ADDED; } - argv_reset(&argv); + argv_free(&argv); gc_free(&gc); } @@ -2122,7 +2122,7 @@ add_route_ipv6(struct route_ipv6 *r6, const struct tuntap *tt, unsigned int flag { r6->flags &= ~RT_ADDED; } - argv_reset(&argv); + argv_free(&argv); gc_free(&gc); } @@ -2314,7 +2314,7 @@ delete_route(struct route_ipv4 *r, done: r->flags &= ~RT_ADDED; - argv_reset(&argv); + argv_free(&argv); gc_free(&gc); } @@ -2548,7 +2548,7 @@ delete_route_ipv6(const struct route_ipv6 *r6, const struct tuntap *tt, unsigned msg(M_FATAL, "Sorry, but I don't know how to do 'route ipv6' commands on this operating system. Try putting your routes in a --route-down script"); #endif /* if defined(TARGET_LINUX) */ - argv_reset(&argv); + argv_free(&argv); gc_free(&gc); } diff --git a/src/openvpn/socket.c b/src/openvpn/socket.c index 3f2b97e4..694e6f70 100644 --- a/src/openvpn/socket.c +++ b/src/openvpn/socket.c @@ -2467,7 +2467,7 @@ link_socket_connection_initiated(const struct buffer *buf, { msg(M_WARN, "WARNING: ipchange plugin call failed"); } - argv_reset(&argv); + argv_free(&argv); } /* Process --ipchange option */ @@ -2477,7 +2477,7 @@ link_socket_connection_initiated(const struct buffer *buf, setenv_str(es, "script_type", "ipchange"); ipchange_fmt(true, &argv, info, &gc); openvpn_run_script(&argv, es, 0, "--ipchange"); - argv_reset(&argv); + argv_free(&argv); } gc_free(&gc); diff --git a/src/openvpn/ssl_verify.c b/src/openvpn/ssl_verify.c index 61872251..ede6da55 100644 --- a/src/openvpn/ssl_verify.c +++ b/src/openvpn/ssl_verify.c @@ -522,7 +522,7 @@ verify_cert_call_plugin(const struct plugin_list *plugins, struct env_set *es, ret = plugin_call_ssl(plugins, OPENVPN_PLUGIN_TLS_VERIFY, &argv, NULL, es, cert_depth, cert); - argv_reset(&argv); + argv_free(&argv); if (ret == OPENVPN_PLUGIN_FUNC_SUCCESS) { @@ -615,7 +615,7 @@ verify_cert_call_command(const char *verify_command, struct env_set *es, cleanup: gc_free(&gc); - argv_reset(&argv); + argv_free(&argv); if (ret) { @@ -1159,7 +1159,7 @@ done: platform_unlink(tmp_file); } - argv_reset(&argv); + argv_free(&argv); gc_free(&gc); return ret; } diff --git a/src/openvpn/tun.c b/src/openvpn/tun.c index f80aedf8..94087bd2 100644 --- a/src/openvpn/tun.c +++ b/src/openvpn/tun.c @@ -1012,7 +1012,7 @@ do_ifconfig_ipv6(struct tuntap *tt, const char *ifname, int tun_mtu, #endif /* outer "if defined(TARGET_xxx)" conditional */ gc_free(&gc); - argv_reset(&argv); + argv_free(&argv); } /** @@ -1400,7 +1400,7 @@ do_ifconfig_ipv4(struct tuntap *tt, const char *ifname, int tun_mtu, #endif /* if defined(TARGET_LINUX) */ gc_free(&gc); - argv_reset(&argv); + argv_free(&argv); } /* execute the ifconfig command through the shell */ @@ -1968,7 +1968,7 @@ undo_ifconfig_ipv4(struct tuntap *tt, struct gc_arena *gc) argv_msg(M_INFO, &argv); openvpn_execve_check(&argv, NULL, 0, "Linux ip addr del failed"); - argv_reset(&argv); + argv_free(&argv); } void @@ -1988,7 +1988,7 @@ undo_ifconfig_ipv6(struct tuntap *tt, struct gc_arena *gc) argv_msg(M_INFO, &argv); openvpn_execve_check(&argv, NULL, 0, "Linux ip -6 addr del failed"); - argv_reset(&argv); + argv_free(&argv); } void @@ -2280,7 +2280,7 @@ solaris_close_tun(struct tuntap *tt) IFCONFIG_PATH, tt->actual_name ); argv_msg(M_INFO, &argv); openvpn_execve_check(&argv, NULL, 0, "Solaris ifconfig inet6 unplumb failed"); - argv_reset(&argv); + argv_free(&argv); } if (tt->ip_fd >= 0) @@ -2365,7 +2365,7 @@ solaris_error_close(struct tuntap *tt, const struct env_set *es, openvpn_execve_check(&argv, es, 0, "Solaris ifconfig unplumb failed"); close_tun(tt); msg(M_FATAL, "Solaris ifconfig failed"); - argv_reset(&argv); + argv_free(&argv); } int @@ -2453,7 +2453,7 @@ close_tun(struct tuntap *tt) openvpn_execve_check(&argv, NULL, 0, "OpenBSD 'destroy tun interface' failed (non-critical)"); free(tt); - argv_reset(&argv); + argv_free(&argv); } int @@ -2539,7 +2539,7 @@ close_tun(struct tuntap *tt) openvpn_execve_check(&argv, NULL, 0, "NetBSD 'destroy tun interface' failed (non-critical)"); free(tt); - argv_reset(&argv); + argv_free(&argv); } static inline int @@ -2680,7 +2680,7 @@ close_tun(struct tuntap *tt) "FreeBSD 'destroy tun interface' failed (non-critical)"); free(tt); - argv_reset(&argv); + argv_free(&argv); } int @@ -3045,7 +3045,7 @@ close_tun(struct tuntap *tt) close_tun_generic(tt); free(tt); - argv_reset(&argv); + argv_free(&argv); gc_free(&gc); } @@ -3149,7 +3149,7 @@ open_tun(const char *dev, const char *dev_type, const char *dev_node, struct tun env_set_add( es, "ODMDIR=/etc/objrepos" ); openvpn_execve_check(&argv, es, S_FATAL, "AIX 'create tun interface' failed"); env_set_destroy(es); - argv_reset(&argv); + argv_free(&argv); } else { @@ -3200,7 +3200,7 @@ close_tun(struct tuntap *tt) free(tt); env_set_destroy(es); - argv_reset(&argv); + argv_free(&argv); } int @@ -4878,14 +4878,14 @@ ipconfig_register_dns(const struct env_set *es) WIN_IPCONFIG_PATH_SUFFIX); argv_msg(D_TUNTAP_INFO, &argv); status = openvpn_execve_check(&argv, es, 0, err); - argv_reset(&argv); + argv_free(&argv); argv_printf(&argv, "%s%s /registerdns", get_win_sys_path(), WIN_IPCONFIG_PATH_SUFFIX); argv_msg(D_TUNTAP_INFO, &argv); status = openvpn_execve_check(&argv, es, 0, err); - argv_reset(&argv); + argv_free(&argv); netcmd_semaphore_release(); msg(D_TUNTAP_INFO, "End ipconfig commands for register-dns..."); @@ -5010,7 +5010,7 @@ netsh_set_dns6_servers(const struct in6_addr *addr_list, netsh_command(&argv, 1, (i==0) ? M_FATAL : M_NONFATAL); } - argv_reset(&argv); + argv_free(&argv); gc_free(&gc); } @@ -5082,7 +5082,7 @@ netsh_ifconfig_options(const char *type, } } - argv_reset(&argv); + argv_free(&argv); gc_free(&gc); } @@ -5173,7 +5173,7 @@ netsh_ifconfig(const struct tuntap_options *to, BOOL_CAST(flags & NI_TEST_FIRST)); } - argv_reset(&argv); + argv_free(&argv); gc_free(&gc); } @@ -5192,7 +5192,7 @@ netsh_enable_dhcp(const struct tuntap_options *to, netsh_command(&argv, 4, M_FATAL); - argv_reset(&argv); + argv_free(&argv); } /* Enable dhcp on tap adapter using iservice */ @@ -6118,7 +6118,7 @@ close_tun(struct tuntap *tt) tt->actual_name); netsh_command(&argv, 1, M_WARN); } - argv_reset(&argv); + argv_free(&argv); } } #if 1 diff --git a/tests/unit_tests/openvpn/test_argv.c b/tests/unit_tests/openvpn/test_argv.c index 9b67fade..fde0ba45 100644 --- a/tests/unit_tests/openvpn/test_argv.c +++ b/tests/unit_tests/openvpn/test_argv.c @@ -39,7 +39,7 @@ argv_printf__multiple_spaces_in_format__parsed_as_one(void **state) argv_printf(&a, " %s %s %d ", PATH1, PATH2, 42); assert_int_equal(a.argc, 3); - argv_reset(&a); + argv_free(&a); } static void @@ -51,7 +51,7 @@ argv_printf_cat__multiple_spaces_in_format__parsed_as_one(void **state) argv_printf_cat(&a, " %s %s", PATH2, PARAM1); assert_int_equal(a.argc, 3); - argv_reset(&a); + argv_free(&a); } static void @@ -63,7 +63,7 @@ argv_printf__embedded_format_directive__replaced_in_output(void **state) assert_int_equal(a.argc, 1); assert_string_equal(a.argv[0], ""); - argv_reset(&a); + argv_free(&a); } static void @@ -74,7 +74,7 @@ argv_printf__group_sep_in_arg__fail_no_ouput(void **state) assert_false(argv_printf(&a, "tool --do %s", "this\035--harmful")); assert_int_equal(a.argc, 0); - argv_reset(&a); + argv_free(&a); } static void @@ -91,7 +91,7 @@ argv_printf__combined_path_with_spaces__argc_correct(void **state) argv_printf(&a, "foo %s%s %s x y", PATH2, PATH1, "foo"); assert_int_equal(a.argc, 5); - argv_reset(&a); + argv_free(&a); } static void @@ -125,7 +125,7 @@ argv_parse_cmd__command_string__argc_correct(void **state) argv_parse_cmd(&a, SCRIPT_CMD); assert_int_equal(a.argc, 3); - argv_reset(&a); + argv_free(&a); } static void @@ -137,7 +137,7 @@ argv_parse_cmd__command_and_extra_options__argc_correct(void **state) argv_printf_cat(&a, "bar baz %d %s", 42, PATH1); assert_int_equal(a.argc, 7); - argv_reset(&a); + argv_free(&a); } static void @@ -150,7 +150,21 @@ argv_printf_cat__used_twice__argc_correct(void **state) argv_printf_cat(&a, "foo"); assert_int_equal(a.argc, 5); - argv_reset(&a); + argv_free(&a); +} + +static void +argv_str__empty_argv__empty_output(void **state) +{ + struct argv a = argv_new(); + struct gc_arena gc = gc_new(); + const char *output; + + output = argv_str(&a, &gc, PA_BRACKET); + assert_string_equal(output, ""); + + argv_free(&a); + gc_free(&gc); } static void @@ -170,7 +184,7 @@ argv_str__multiple_argv__correct_output(void **state) assert_string_equal(output, "[" PATH1 PATH2 "] [" PARAM1 "] [" PARAM2 "]" " [-1] [4294967295] [1]"); - argv_reset(&a); + argv_free(&a); gc_free(&gc); } @@ -183,9 +197,9 @@ argv_insert_head__empty_argv__head_only(void **state) b = argv_insert_head(&a, PATH1); assert_int_equal(b.argc, 1); assert_string_equal(b.argv[0], PATH1); - argv_reset(&b); + argv_free(&b); - argv_reset(&a); + argv_free(&a); } static void @@ -208,9 +222,9 @@ argv_insert_head__non_empty_argv__head_added(void **state) assert_string_equal(b.argv[i], a.argv[i - 1]); } } - argv_reset(&b); + argv_free(&b); - argv_reset(&a); + argv_free(&a); } int @@ -226,6 +240,7 @@ main(void) cmocka_unit_test(argv_parse_cmd__command_string__argc_correct), cmocka_unit_test(argv_parse_cmd__command_and_extra_options__argc_correct), cmocka_unit_test(argv_printf_cat__used_twice__argc_correct), + cmocka_unit_test(argv_str__empty_argv__empty_output), cmocka_unit_test(argv_str__multiple_argv__correct_output), cmocka_unit_test(argv_insert_head__non_empty_argv__head_added), };