proxychains-ng/src/common.c
2020-10-28 10:39:27 +00:00

133 lines
2.7 KiB
C

#include "common.h"
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
const char *proxy_type_strmap[] = {
"http",
"socks4",
"socks5",
};
const char *chain_type_strmap[] = {
"dynamic_chain",
"strict_chain",
"random_chain",
"round_robin_chain",
};
const char *proxy_state_strmap[] = {
"play",
"down",
"blocked",
"busy",
};
/* isnumericipv4() taken from libulz */
int pc_isnumericipv4(const char* ipstring) {
size_t x = 0, n = 0, d = 0;
int wasdot = 0;
while(1) {
switch(ipstring[x]) {
case 0: goto done;
case '.':
if(!n || wasdot) return 0;
d++;
wasdot = 1;
break;
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
n++;
wasdot = 0;
break;
default:
return 0;
}
x++;
}
done:
if(d == 3 && n >= 4 && n <= 12) return 1;
return 0;
}
// stolen from libulz (C) rofl0r
void pc_stringfromipv4(unsigned char *ip_buf_4_bytes, char *outbuf_16_bytes) {
unsigned char *p;
char *o = outbuf_16_bytes;
unsigned char n;
for(p = ip_buf_4_bytes; p < ip_buf_4_bytes + 4; p++) {
n = *p;
if(*p >= 100) {
if(*p >= 200)
*(o++) = '2';
else
*(o++) = '1';
n %= 100;
}
if(*p >= 10) {
*(o++) = (n / 10) + '0';
n %= 10;
}
*(o++) = n + '0';
*(o++) = '.';
}
o[-1] = 0;
}
static int check_path(char *path) {
if(!path)
return 0;
return access(path, R_OK) != -1;
}
char *get_config_path(char* default_path, char* pbuf, size_t bufsize) {
char buf[512];
// top priority: user defined path
char *path = default_path;
if(check_path(path))
goto have;
// priority 1: env var PROXYCHAINS_CONF_FILE
path = getenv(PROXYCHAINS_CONF_FILE_ENV_VAR);
if(check_path(path))
goto have;
// priority 2; proxychains conf in actual dir
path = getcwd(buf, sizeof(buf));
snprintf(pbuf, bufsize, "%s/%s", path, PROXYCHAINS_CONF_FILE);
path = pbuf;
if(check_path(path))
goto have;
// priority 3; $HOME/.proxychains/proxychains.conf
path = getenv("HOME");
snprintf(pbuf, bufsize, "%s/.proxychains/%s", path, PROXYCHAINS_CONF_FILE);
path = pbuf;
if(check_path(path))
goto have;
// priority 3b: ~/config/settings/proxychains.conf (for haiku)
path = getenv("HOME");
snprintf(pbuf, bufsize, "%s/config/settings/%s", path, PROXYCHAINS_CONF_FILE);
path = pbuf;
if(check_path(path))
goto have;
// priority 4: $SYSCONFDIR/proxychains.conf
path = SYSCONFDIR "/" PROXYCHAINS_CONF_FILE;
if(check_path(path))
goto have;
// priority 5: /etc/proxychains.conf
path = "/etc/" PROXYCHAINS_CONF_FILE;
if(check_path(path))
goto have;
perror("couldnt find configuration file");
exit(1);
return NULL;
have:
return path;
}