From 65c65bb7a3e981b01e0dfe42dbd62617b867de55 Mon Sep 17 00:00:00 2001 From: Chris Johns Date: Fri, 1 Jul 2016 15:49:52 +1000 Subject: Add telnetd as service to rc.conf. --- rtemsbsd/telnetd/telnetd-service.c | 184 +++++++++++++++++++++++++++++++++++++ 1 file changed, 184 insertions(+) create mode 100644 rtemsbsd/telnetd/telnetd-service.c (limited to 'rtemsbsd/telnetd/telnetd-service.c') diff --git a/rtemsbsd/telnetd/telnetd-service.c b/rtemsbsd/telnetd/telnetd-service.c new file mode 100644 index 00000000..be6e8123 --- /dev/null +++ b/rtemsbsd/telnetd/telnetd-service.c @@ -0,0 +1,184 @@ +/* + * Copyright (c) 2016 Chris Johns . All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +/* + * Telnet service. To use add to rc.conf: + * + * telnetd_enable="YES" + * telnet_options="-p 21 -s 32768 -P 8 -L" + * + * The options defaults are show. The options are: + * + * -C conns : Maximum connections (ptys). + * -P priority : Telnet thread priority (RTEMS Classis API). + * -L : Login using /etc/passwd + */ + +#include +#include +#include +#include +#include + +#define __need_getopt_newlib +#include + +#include +#include + +/* + * Stack size. Use RTEMS_BSD_CONFIG_TELNETD_STACK_SIZE. + */ +extern int rtems_telnetd_stack_size; +__weak_reference(_rtems_telnetd_stack_size, rtems_telnetd_stack_size); +int _rtems_telnetd_stack_size; + +/* + * Condefs always defines this variable. + */ +extern int rtems_telnetd_maximum_ptys; + +/* + * By default no login. + */ +static bool telnet_login; + +static void +hydra_telnetd_command(char* device, void* arg) +{ + rtems_shell_login_check_t login = NULL; + rtems_shell_env_t shell_env; + + if (telnet_login) + login = rtems_shell_login_check; + + rtems_shell_dup_current_env(&shell_env); + + shell_env.devname = device; + shell_env.taskname = "TELn"; + shell_env.exit_shell = false; + shell_env.forever = 0; + shell_env.echo = 0; + shell_env.input = NULL; + shell_env.output = NULL; + shell_env.output_append = 0; + shell_env.wake_on_end = 0; + shell_env.login_check = login; + + rtems_shell_main_loop (&shell_env); +} + +static int +telnetd_service(rtems_bsd_rc_conf* rc_conf) +{ + rtems_telnetd_config_table config = { + .priority = 100, /* Telnet task priority */ + .stack_size = 32 * 1024, /* Stack size */ + .command = hydra_telnetd_command, /* The telnetd command, runs the shell. */ + }; + rtems_bsd_rc_conf_argc_argv* aa; + int conns = 0; + int r; + + if (rtems_telnetd_stack_size != 0) + config.stack_size = rtems_telnetd_stack_size; + + aa = rtems_bsd_rc_conf_argc_argv_create(); + if (aa == NULL) + return -1; + + r = rtems_bsd_rc_conf_find(rc_conf, "telnetd_enable", aa); + if (r == 0) { + rtems_status_code sc; + bool verbose = false; + if (aa->argc == 2 && strcasecmp("YES", aa->argv[1]) == 0) { + r = rtems_bsd_rc_conf_find(rc_conf, "telnetd_options", aa); + if (r == 0) { + struct getopt_data data; + char* end; + + memset(&data, 0, sizeof(data)); + + while (true) { + int c; + + c = getopt_r(aa->argc, aa->argv, "C:P:Lv", &data); + if (c == -1) + break; + + switch (c) { + case 'C': + conns = strtoul(data.optarg, &end, 10); + if (conns == 0 || *end != '\0') { + fprintf(stderr, "error: telnet: invalid connections countt\n"); + } + else { + rtems_telnetd_maximum_ptys = conns; + } + break; + case 'P': + config.priority = strtoul(data.optarg, &end, 10); + if (config.priority == 0 || *end != '\0') { + fprintf(stderr, "error: telnetd: invalid priority\n"); + config.priority = 100; + } + break; + case 'L': + telnet_login = true; + break; + case 'v': + verbose = true; + break; + case '?': + default: + fprintf(stderr, "error: telnetd: unknown option: %s\n", data.optarg); + break; + } + } + } + if (verbose) { + printf("telnetd: conns:%lu pri:%lu login:%s\n", + rtems_telnetd_maximum_ptys, config.priority, + telnet_login == NULL ? "no" : "yes"); + } + sc = rtems_telnetd_start(&config); + if (sc != RTEMS_SUCCESSFUL) + fprintf(stderr, "error: telnetd: %s\n", rtems_status_text(sc)); + } + } + + return 0; +} + +void +rc_conf_telnetd_init(void* arg) +{ + int r; + r = rtems_bsd_rc_conf_service_add("telnetd", + "after:network;before:ftpd;", + telnetd_service); + if (r < 0) + fprintf(stderr, "error: telnetd service add failed: %s\n", strerror(errno)); +} -- cgit v1.2.3