You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
118 lines
2.6 KiB
C
118 lines
2.6 KiB
C
/*
|
|
* Secure X Message Passing Library v2 examples.
|
|
*
|
|
* (c) Originally written by somebody else ...
|
|
* (c) Alexander Vdolainen 2013-2015 <avdolainen@gmail.com>
|
|
*
|
|
* libsxmp is free software: you can redistribute it and/or modify it
|
|
* under the terms of the GNU Lesser General Public License as published
|
|
* by the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* libsxmp is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
|
* See the GNU Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.";
|
|
*
|
|
* This is a simple helpers to make code more clean;
|
|
*
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <dirent.h>
|
|
#define __USE_GNU
|
|
#include <stdlib.h>
|
|
#include <stdarg.h>
|
|
#include <sys/types.h>
|
|
#include <limits.h>
|
|
#include <sys/wait.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/resource.h>
|
|
#include <netdb.h>
|
|
#include <unistd.h>
|
|
#include <netinet/in.h>
|
|
#include <stdint.h>
|
|
#include <errno.h>
|
|
#include <string.h>
|
|
|
|
int openlistener_socket(int port)
|
|
{
|
|
int sd;
|
|
struct sockaddr_in addr;
|
|
|
|
sd = socket(PF_INET, SOCK_STREAM, 0);
|
|
memset(&addr, 0, sizeof(addr));
|
|
|
|
addr.sin_family = AF_INET;
|
|
addr.sin_port = htons(port);
|
|
addr.sin_addr.s_addr = INADDR_ANY;
|
|
|
|
if(bind(sd, (struct sockaddr*)&addr, sizeof(addr)) != 0) {
|
|
perror("can't bind port");
|
|
abort();
|
|
}
|
|
if(listen(sd, 10) != 0) {
|
|
perror("Can't configure listening port");
|
|
abort();
|
|
}
|
|
|
|
return sd;
|
|
}
|
|
|
|
char *nodehostname(void)
|
|
{
|
|
char *hm = malloc(HOST_NAME_MAX);
|
|
|
|
if(!gethostname(hm, HOST_NAME_MAX))
|
|
return hm;
|
|
else {
|
|
if(hm) free(hm);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
static inline int __removechar(char *b, size_t chrs)
|
|
{
|
|
char *c = b + chrs;
|
|
size_t blen = strlen(c) + sizeof(char);
|
|
|
|
memmove(b, c, blen);
|
|
|
|
return chrs;
|
|
}
|
|
|
|
int normalize_path(char *path)
|
|
{
|
|
char *obuf = path;
|
|
int cutlen;
|
|
|
|
/* first remove useless / if found */
|
|
while((obuf = strchr(obuf, '/'))) {
|
|
obuf++;
|
|
while(*obuf == '/') __removechar(obuf, 1);
|
|
}
|
|
|
|
obuf = path; /* much cleaner now */
|
|
while(*obuf != '\0') {
|
|
if(*obuf == '.' && *(obuf - 1) == '/') {
|
|
if(!strcmp(obuf, "./")) __removechar(obuf, 2);
|
|
else if(!strcmp(obuf, "../")) {
|
|
cutlen = strlen(path) - strlen(obuf);
|
|
if(cutlen < 4) return -1;
|
|
else cutlen = 4;
|
|
obuf -= 2;
|
|
while(*obuf != '/') {
|
|
obuf--; cutlen++;
|
|
}
|
|
__removechar(obuf, cutlen);
|
|
}
|
|
}
|
|
obuf++;
|
|
}
|
|
|
|
return 0;
|
|
}
|