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a3a13eb3a8
Solving issue #110. The original work is at !231 Some changes were needed because the newly added features in master through time Signed-off-by: Mohammad Shehar Yaar Tausif <sheharyaar48@gmail.com> Signed-off-by: Norbert Pocs <npocs@redhat.com> Reviewed-by: Jakub Jelen <jjelen@redhat.com>
91 lines
2.1 KiB
C
91 lines
2.1 KiB
C
/* ssh_ping.c */
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/*
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Copyright 2018 Red Hat, Inc
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Author: Jakub Jelen <jjelen@redhat.com>
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This file is part of the SSH Library
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You are free to copy this file, modify it in any way, consider it being public
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domain. This does not apply to the rest of the library though, but it is
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allowed to cut-and-paste working code from this file to any license of
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program.
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The goal is to show the API in action. It's not a reference on how terminal
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clients must be made or how a client should react.
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*/
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#include "config.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdbool.h>
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#include <libssh/libssh.h>
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#include <libssh/kex.h>
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int main(int argc, char **argv)
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{
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const char *banner = NULL;
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ssh_session session = NULL;
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const char *hostkeys = NULL;
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int rc = 1;
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bool process_config = false;
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if (argc < 1 || argv[1] == NULL) {
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fprintf(stderr, "Error: Need an argument (hostname)\n");
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goto out;
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}
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ssh_init();
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session = ssh_new();
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if (session == NULL) {
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goto out;
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}
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rc = ssh_options_set(session, SSH_OPTIONS_HOST, argv[1]);
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if (rc < 0) {
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goto out;
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}
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/* The automatic username is not available under uid wrapper */
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rc = ssh_options_set(session, SSH_OPTIONS_USER, "ping");
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if (rc < 0) {
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goto out;
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}
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/* Ignore system-wide configurations when simply trying to reach host */
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rc = ssh_options_set(session, SSH_OPTIONS_PROCESS_CONFIG, &process_config);
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if (rc < 0) {
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goto out;
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}
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/* Enable all supported algorithms */
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hostkeys = ssh_kex_get_supported_method(SSH_HOSTKEYS);
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rc = ssh_options_set(session, SSH_OPTIONS_HOSTKEYS, hostkeys);
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if (rc < 0) {
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goto out;
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}
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rc = ssh_connect(session);
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if (rc != SSH_OK) {
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fprintf(stderr, "Connection failed : %s\n", ssh_get_error(session));
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goto out;
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}
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banner = ssh_get_serverbanner(session);
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if (banner == NULL) {
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fprintf(stderr, "Did not receive SSH banner\n");
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goto out;
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}
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printf("OK: %s\n", banner);
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rc = 0;
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out:
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ssh_free(session);
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ssh_finalize();
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return rc;
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}
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