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- Committer: Björn Påhlsson
- Date: 2007-10-20 21:38:25 UTC
- Revision ID: belorn@tower-20071020213825-abf6f0d1c33ee961
First working version with: IPv6, GnuTLS, X.509 certificates, DN
retrieval.
retrieval.
- files added:
- bad-ca.pem
- files removed:
- TODO
- plugins.d
- files modified:
- Makefile
added
removed
plugbasedclient.c
1
/* -*- coding: utf-8 -*- */
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/*
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* Mandos plugin runner - Run Mandos plugins
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*
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* Copyright © 2007-2008 Teddy Hogeborn and Björn Påhlsson.
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*
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* This program is free software: you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program 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. See the GNU
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* 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
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* <http://www.gnu.org/licenses/>.
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*
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* Contact the authors at <https://www.fukt.bsnet.se/~belorn/> and
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* <https://www.fukt.bsnet.se/~teddy/>.
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*/
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#define _FORTIFY_SOURCE 2
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#include <stdio.h> /* popen, fileno */
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#include <iso646.h> /* and, or, not */
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#include <sys/types.h> /* DIR, opendir, stat, struct stat, waitpid,
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WIFEXITED, WEXITSTATUS, wait */
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#include <sys/wait.h> /* wait */
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#include <dirent.h> /* DIR, opendir */
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#include <sys/stat.h> /* stat, struct stat */
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#include <unistd.h> /* stat, struct stat, chdir */
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#include <stdlib.h> /* EXIT_FAILURE */
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#include <sys/select.h> /* fd_set, select, FD_ZERO, FD_SET,
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FD_ISSET */
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#include <string.h> /* strlen, strcpy, strcat */
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#include <stdbool.h> /* true */
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#include <sys/wait.h> /* waitpid, WIFEXITED, WEXITSTATUS */
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#include <errno.h> /* errno */
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#include <argp.h> /* argp */
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struct process;
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typedef struct process{
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pid_t pid;
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int fd;
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char *buffer;
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size_t buffer_size;
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size_t buffer_length;
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struct process *next;
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} process;
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typedef struct plugin{
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char *name; /* can be "global" and any plugin name */
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char **argv;
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int argc;
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struct plugin *next;
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} plugin;
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plugin *getplugin(char *name, plugin **plugin_list){
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for (plugin *p = *plugin_list; p != NULL; p = p->next){
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if ((p->name == name)
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or (p->name and name and (strcmp(p->name, name) == 0))){
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return p;
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}
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}
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/* Create a new plugin */
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plugin *new_plugin = malloc(sizeof(plugin));
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if (new_plugin == NULL){
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perror("malloc");
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exit(EXIT_FAILURE);
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}
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new_plugin->name = name;
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new_plugin->argv = malloc(sizeof(char *) * 2);
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if (new_plugin->argv == NULL){
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perror("malloc");
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exit(EXIT_FAILURE);
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}
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new_plugin->argv[0] = name;
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new_plugin->argv[1] = NULL;
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new_plugin->argc = 1;
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/* Append the new plugin to the list */
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new_plugin->next = *plugin_list;
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*plugin_list = new_plugin;
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return new_plugin;
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}
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void addarguments(plugin *p, char *arg){
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p->argv[p->argc] = arg;
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p->argv = realloc(p->argv, sizeof(char *) * (size_t)(p->argc + 2));
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if (p->argv == NULL){
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perror("malloc");
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exit(EXIT_FAILURE);
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}
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p->argc++;
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p->argv[p->argc] = NULL;
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}
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#define BUFFER_SIZE 256
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const char *argp_program_version =
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"plugbasedclient 0.9";
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const char *argp_program_bug_address =
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"<mandos@fukt.bsnet.se>";
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static char doc[] =
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"Mandos plugin runner -- Run Mandos plugins";
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/* A description of the arguments we accept. */
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static char args_doc[] = "";
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int main(int argc, char *argv[]){
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char plugindir[] = "plugins.d";
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size_t d_name_len, plugindir_len = sizeof(plugindir)-1;
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DIR *dir;
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struct dirent *dirst;
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struct stat st;
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fd_set rfds_orig;
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int ret, maxfd = 0;
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process *process_list = NULL;
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/* The options we understand. */
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struct argp_option options[] = {
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{ .name = "global-options", .key = 'g',
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.arg = "option[,option[,...]]", .flags = 0,
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.doc = "Options effecting all plugins" },
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{ .name = "options-for", .key = 'o',
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.arg = "plugin:option[,option[,...]]", .flags = 0,
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.doc = "Options effecting only specified plugins" },
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{ .name = NULL }
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};
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error_t parse_opt (int key, char *arg, struct argp_state *state) {
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/* Get the INPUT argument from `argp_parse', which we
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know is a pointer to our arguments structure. */
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plugin **plugins = state->input;
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switch (key) {
138
case 'g':
139
if (arg != NULL){
140
char *p = strtok(arg, ",");
141
do{
142
addarguments(getplugin(NULL, plugins), p);
143
p = strtok(NULL, ",");
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} while (p);
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}
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break;
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case 'o':
148
if (arg != NULL){
149
char *name = strtok(arg, ":");
150
char *p = strtok(NULL, ":");
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p = strtok(p, ",");
152
do{
153
addarguments(getplugin(name, plugins), p);
154
p = strtok(NULL, ",");
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} while (p);
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}
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break;
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case ARGP_KEY_ARG:
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argp_usage (state);
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break;
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case ARGP_KEY_END:
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break;
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default:
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return ARGP_ERR_UNKNOWN;
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}
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return 0;
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}
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plugin *plugin_list = NULL;
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struct argp argp = { .options = options, .parser = parse_opt,
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.args_doc = args_doc, .doc = doc };
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argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
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/* for(plugin *p = plugin_list; p != NULL; p=p->next){ */
177
/* fprintf(stderr, "Plugin: %s has %d arguments\n", p->name ? p->name : "Global", p->argc); */
178
/* for(char **a = p->argv + 1; *a != NULL; a++){ */
179
/* fprintf(stderr, "\tArg: %s\n", *a); */
180
/* } */
181
/* } */
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/* return 0; */
184
185
dir = opendir(plugindir);
186
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if(dir == NULL){
188
fprintf(stderr, "Can not open directory\n");
189
return EXIT_FAILURE;
190
}
191
192
FD_ZERO(&rfds_orig);
193
194
while(true){
195
dirst = readdir(dir);
196
197
// All directory entries have been processed
198
if(dirst == NULL){
199
break;
200
}
201
202
d_name_len = strlen(dirst->d_name);
203
204
// Ignore dotfiles and backup files
205
if (dirst->d_name[0] == '.'
206
or dirst->d_name[d_name_len - 1] == '~'){
207
continue;
208
}
209
210
char *filename = malloc(d_name_len + plugindir_len + 2);
211
strcpy(filename, plugindir);
212
strcat(filename, "/");
213
strcat(filename, dirst->d_name);
214
215
stat(filename, &st);
216
217
if (S_ISREG(st.st_mode) and (access(filename, X_OK) == 0)){
218
// Starting a new process to be watched
219
process *new_process = malloc(sizeof(process));
220
int pipefd[2];
221
ret = pipe(pipefd);
222
if (ret == -1){
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perror(argv[0]);
224
goto end;
225
}
226
new_process->pid = fork();
227
if(new_process->pid == 0){
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/* this is the child process */
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closedir(dir);
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close(pipefd[0]); /* close unused read end of pipe */
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dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
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char *basename;
233
basename = strrchr(filename, '/');
234
if (basename == NULL){
235
basename = filename;
236
} else {
237
basename++;
238
}
239
plugin *p = getplugin(basename, &plugin_list);
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plugin *g = getplugin(NULL, &plugin_list);
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for(char **a = g->argv + 1; *a != NULL; a++){
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addarguments(p, *a);
244
}
245
if(execv(filename, p->argv) < 0){
246
perror(argv[0]);
247
close(pipefd[1]);
248
exit(EXIT_FAILURE);
249
}
250
/* no return */
251
}
252
close(pipefd[1]); /* close unused write end of pipe */
253
new_process->fd = pipefd[0];
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new_process->buffer = malloc(BUFFER_SIZE);
255
if (new_process->buffer == NULL){
256
perror(argv[0]);
257
goto end;
258
}
259
new_process->buffer_size = BUFFER_SIZE;
260
new_process->buffer_length = 0;
261
FD_SET(new_process->fd, &rfds_orig);
262
263
if (maxfd < new_process->fd){
264
maxfd = new_process->fd;
265
}
266
267
//List handling
268
new_process->next = process_list;
269
process_list = new_process;
270
}
271
}
272
273
closedir(dir);
274
275
if (process_list != NULL){
276
while(true){
277
fd_set rfds = rfds_orig;
278
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
279
if (select_ret == -1){
280
perror(argv[0]);
281
goto end;
282
}else{
283
for(process *process_itr = process_list; process_itr != NULL;
284
process_itr = process_itr->next){
285
if(FD_ISSET(process_itr->fd, &rfds)){
286
if(process_itr->buffer_length + BUFFER_SIZE
287
> process_itr->buffer_size){
288
process_itr->buffer = realloc(process_itr->buffer,
289
process_itr->buffer_size
290
+ (size_t) BUFFER_SIZE);
291
if (process_itr->buffer == NULL){
292
perror(argv[0]);
293
goto end;
294
}
295
process_itr->buffer_size += BUFFER_SIZE;
296
}
297
ret = read(process_itr->fd, process_itr->buffer
298
+ process_itr->buffer_length, BUFFER_SIZE);
299
if(ret < 0){
300
/* Read error from this process; ignore it */
301
continue;
302
}
303
process_itr->buffer_length += (size_t) ret;
304
if(ret == 0){
305
/* got EOF */
306
/* wait for process exit */
307
int status;
308
waitpid(process_itr->pid, &status, 0);
309
if(WIFEXITED(status) and WEXITSTATUS(status) == 0){
310
for(size_t written = 0;
311
written < process_itr->buffer_length;){
312
ret = write(STDOUT_FILENO,
313
process_itr->buffer + written,
314
process_itr->buffer_length - written);
315
if(ret < 0){
316
perror(argv[0]);
317
goto end;
318
}
319
written += (size_t)ret;
320
}
321
goto end;
322
} else {
323
FD_CLR(process_itr->fd, &rfds_orig);
324
}
325
}
326
}
327
}
328
}
329
}
330
}
331
332
end:
333
for(process *process_itr = process_list; process_itr != NULL;
334
process_itr = process_itr->next){
335
close(process_itr->fd);
336
kill(process_itr->pid, SIGTERM);
337
free(process_itr->buffer);
338
}
339
340
while(true){
341
int status;
342
ret = wait(&status);
343
if (ret == -1){
344
if(errno != ECHILD){
345
perror("wait");
346
}
347
break;
348
}
349
}
350
return EXIT_SUCCESS;
351
}
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Version: 2.0.2.dev0