[examples] added autoconf stubs for smpf example i.e. new option to configure added, because this example require readline library;
Alexander Vdolainen
9 years ago
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bcda9e1810
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5448493764
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/*
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* Secure X Message Passing Library v2 examples.
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*
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* (c) Alexander Vdolainen 2013-2015 <avdolainen@gmail.com>
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* (c) Alexander Vdolainen 2016 <avdolainen@zoho.com>
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*
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* libsxmp is free software: you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published
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* by the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* libsxmp is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.";
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*
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*/
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/*
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* This is an example of sxmp usage.
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* NOTE: It was developed quite fast within one day,
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* btw - this the reason of some ugly code here.
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*
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* This implements a simple client-server topology, to see
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* more advanced technics check out other examples.
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*
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* NOTE(win32): don't have a time to test it or fix it to
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* make it works on windows, if you can - u're welcome.
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*/
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#include <stdio.h>
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#include <dirent.h>
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#define __USE_GNU
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#include <stdlib.h>
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#include <stdarg.h>
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#include <sys/types.h>
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#include <limits.h>
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#include <sys/select.h>
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#include <sys/wait.h>
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#include <sys/socket.h>
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#include <sys/resource.h>
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#include <netdb.h>
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#include <unistd.h>
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#include <uuid/uuid.h>
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#include <execinfo.h>
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#include <netinet/in.h>
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#include <tdata/usrtc.h>
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#include <tdata/list.h>
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#include <sexpr/sexp.h>
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#include <sxmp/limits.h>
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#include <sxmp/sxmp.h>
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#include <pthread.h>
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#include <stdint.h>
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#include <getopt.h>
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#include <errno.h>
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#include "helpers.h"
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#include "smpf.h"
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#include "smpfd_defs.h"
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#include "../config.h"
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#define FULL_PROGRAM_NAME "SMPF (secure message passing file) daemon"
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static struct smpfd_ctx daemon_ctx;
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/* firstly we need to take an rpc calls data,
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* sxmp uses usrtc from libtdata to store it
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*/
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static usrtc_t *fulist;
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/* ok, here we will define out sxmp specific functions */
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/*
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* RPC list contain groups of RPC calls called channel types
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* for each sxmp link depends on access rules you can change
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* available channel types.
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* To do so you must provide a special callback returning this list.
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* Since we haven't any access restrictions in our example, just
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* create a fake.
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*/
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static usrtc_t *__rettlist(sxlink_t *l)
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{
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return fulist;
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}
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/*
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* Each sxmp link validated by certificate ID,
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* i.e. when basic checking is done, you can also
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* review the certificate ID, for example you need
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* to disable certificate for a time being.
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*
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* Here we don't have those checks, just always accept
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*/
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static int __validate_sslpem(sxlink_t *l)
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{
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return 0;
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}
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/*
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* To be more paranoic, sxmp also allow to
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* check up username and password.
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* We don't overview this tuff here, just
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* always allow.
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*/
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static int __secure_check(sxlink_t *l)
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{
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return SXE_SUCCESS;
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}
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/* remote functions implementation */
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/* misc functions */
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static int __ping(void *m, sexp_t *sx)
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{
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return sxmsg_return((sxmsg_t*)m, SXE_SUCCESS);
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}
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/* command line options helpers */
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static void __help_print(FILE *fso, const char *fmtname)
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{
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fprintf(fso, "\n%s\n\n", FULL_PROGRAM_NAME);
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/* usage options */
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fprintf(fso, "Usage:\n");
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fprintf(fso, "\t%s -r | --root-x509 <path> -u | --master-x509 <path> "
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" [-p | --listen-port <port>] [-R | --root-dir <directory>]\n", fmtname);
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/* defaults */
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fprintf(fso, "\t%s -h | --help\n", fmtname);
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fprintf(fso, "\t%s -v | --version\n", fmtname);
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/* options description */
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fprintf(fso, "\nOptions:\n");
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fprintf(fso, "\t%-33s Set pathname of the remote root X.509 public certificate.\n",
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"-r | --root-x509 <path>");
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fprintf(fso, "\t%-33s Set pathname of the host X.509 public and private certificate.\n",
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"-m | --master-x509 <path>");
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fprintf(fso, "\t%-33s Remote host listening port number [default: %d].\n",
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"-p | --listen-port <port>", DEFAULT_PORT);
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fprintf(fso, "\t%-33s Remote directory becoming root for user [default: %s].\n",
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"-R | --root-dir <directory>", DEFAULT_ROOT_DIR);
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fprintf(fso, "\t%-33s Show help screen.\n", "-h | --help");
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fprintf(fso, "\t%-33s Print version information.\n", "-v | --version");
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return;
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}
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static void __version_print(FILE *fso)
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{
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fprintf(fso, "\n%s.\n", FULL_PROGRAM_NAME);
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fprintf(fso, "Examples bundle for %s %s.\n", PACKAGE_NAME, PACKAGE_VERSION);
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return;
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}
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int main(int argc, char **argv)
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{
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char *rootca = NULL, *cert = NULL;
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char *root_dir = NULL;
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sxhub_t *sxmphub = sxhub_create();
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int port = DEFAULT_PORT;
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int opt;
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while(1) {
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int option_index = 0;
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static struct option long_options[] = {
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/* These options a generic ones. */
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{"help", no_argument, NULL, 'h'}, /* print out help and version info */
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{"version", no_argument, NULL, 'v'}, /* just out a version info */
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/* The following options about settings . */
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{"root-x509", required_argument, NULL, 'r'},
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{"master-x509", required_argument, NULL, 'm'},
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{"root-dir", required_argument, NULL, 'R'},
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{"listen-port", required_argument, NULL, 'p'},
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{ NULL, 0, NULL, 0 },
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};
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if((opt = getopt_long(argc, argv, "hvr:m:R:p:", long_options,
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&option_index)) == -1) break;
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switch(opt) {
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case 'h':
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__help_print(stdout, argv[0]);
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return 0;
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break;
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case 'v':
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__version_print(stdout);
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return 0;
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break;
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case 'r':
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if(!(rootca = strdup(optarg))) return ENOMEM;
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break;
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case 'm':
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if(!(cert = strdup(optarg))) return ENOMEM;
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break;
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case 'p':
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port = atoi(optarg);
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break;
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case 'R':
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root_dir = strdup(optarg);
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break;
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}
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}
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if(!rootca) {
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fprintf(stderr, "Root CA not pointed.\n Failure.\n");
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__help_print(stderr, argv[0]);
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return EINVAL;
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}
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if(!cert) {
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fprintf(stderr, "User certificate not pointed.\n Failure.\n");
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__help_print(stderr, argv[0]);
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return EINVAL;
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}
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sxmp_init();
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/* all is fine let's init connection subsystem */
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if(!sxmphub) {
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fprintf(stderr, "Subsystem init failed: %d\n", opt);
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return 2;
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}
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/* root directory */
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if(!root_dir) {
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root_dir = strdup(DEFAULT_ROOT_DIR);
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if(!root_dir) {
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fprintf(stderr, "Not enough memory.\n");
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return 2;
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}
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}
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/* set working certificates */
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opt = sxhub_setsslserts(sxmphub, rootca, cert, cert);
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if(opt) {
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fprintf(stderr, "Subsystem init failed (set SSL x.509 pems): %d\n", opt);
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return opt;
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}
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/* clean up */
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free(rootca);
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free(cert);
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free(root_dir);
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/* set important callbacks to do the security checking */
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sxhub_set_authcheck(sxmphub, __secure_check);
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sxhub_set_sslvalidate(sxmphub, __validate_sslpem);
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/* ok, now we need to construct RPC lists (channels) */
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if(!(fulist = malloc(sizeof(usrtc_t)))) {
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fprintf(stderr, "Cannot allocate memory for RPC lists\n Failure.\n");
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return ENOMEM;
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}
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opt = sxmp_rpclist_init(fulist);
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if(opt) {
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fprintf(stderr, "Failed to init rpc list\n Failure.\n");
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return opt;
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}
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/* we will add one channel with type id READONLY_CHANNEL for read only operations */
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opt = sxmp_rpclist_add(fulist, READONLY_CHANNEL, "Read only operations", NULL);
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if(opt) {
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fprintf(stderr, "Failed to add typed RPC channel\n Failure.\n");
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return opt;
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}
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/* ok, let's add stream functions */
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opt = sxmp_rpclist_add_function(fulist, READONLY_CHANNEL, "ping", __ping);
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if(opt) {
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fprintf(stderr, "Failed to add functions to typed RPC channel\n Failure.\n");
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return opt;
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}
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/* ok, setup it */
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sxhub_set_rpcvalidator(sxmphub, __rettlist);
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/* setup our stream */
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// sxhub_stream_register(sxmphub, &dirlist_stream);
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signal(SIGPIPE, SIG_IGN);
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/* now we're ready to run the listen process */
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int srv = openlistener_socket(port);
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while(1) {
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struct sockaddr_in addr;
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socklen_t len = sizeof(addr);
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sxlink_t *link;
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int client = accept(srv, (struct sockaddr*)&addr, &len); /* accept connection as usual */
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link = sxlink_master_accept(sxmphub, client, NULL);
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if(!link) fprintf(stderr, "Cannot create sxmp link (%d)\n", errno);
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}
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sxhub_destroy(sxmphub);
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sxmp_finalize();
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return 0;
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}
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