src/common.c

   1 #include "common.h"
   2 #include <stdlib.h>
   3 #include <unistd.h>
   4 #include <stdio.h>
   5
   6 const char *proxy_type_strmap[] = {
   7     "http",
   8     "socks4",
   9     "socks5",
  10 };
  11
  12 const char *chain_type_strmap[] = {
  13     "dynamic_chain",
  14     "strict_chain",
  15     "random_chain",
  16     "round_robin_chain",
  17 };
  18
  19 const char *proxy_state_strmap[] = {
  20     "play",
  21     "down",
  22     "blocked",
  23     "busy",
  24 };
  25
  26 /* isnumericipv4() taken from libulz */
  27 int pc_isnumericipv4(const char* ipstring) {
  28         size_t x = 0, n = 0, d = 0;
  29         int wasdot = 0;
  30         while(1) {
  31                 switch(ipstring[x]) {
  32                         case 0: goto done;
  33                         case '.':
  34                                 if(!n || wasdot) return 0;
  35                                 d++;
  36                                 wasdot = 1;
  37                                 break;
  38                         case '0': case '1': case '2': case '3': case '4':
  39                         case '5': case '6': case '7': case '8': case '9':
  40                                 n++;
  41                                 wasdot = 0;
  42                                 break;
  43                         default:
  44                                 return 0;
  45                 }
  46                 x++;
  47         }
  48         done:
  49         if(d == 3 && n >= 4 && n <= 12) return 1;
  50         return 0;
  51 }
  52
  53 // stolen from libulz (C) rofl0r
  54 void pc_stringfromipv4(unsigned char *ip_buf_4_bytes, char *outbuf_16_bytes) {
  55         unsigned char *p;
  56         char *o = outbuf_16_bytes;
  57         unsigned char n;
  58         for(p = ip_buf_4_bytes; p < ip_buf_4_bytes + 4; p++) {
  59                 n = *p;
  60                 if(*p >= 100) {
  61                         if(*p >= 200)
  62                                 *(o++) = '2';
  63                         else
  64                                 *(o++) = '1';
  65                         n %= 100;
  66                 }
  67                 if(*p >= 10) {
  68                         *(o++) = (n / 10) + '0';
  69                         n %= 10;
  70                 }
  71                 *(o++) = n + '0';
  72                 *(o++) = '.';
  73         }
  74         o[-1] = 0;
  75 }
  76
  77 static int check_path(char *path) {
  78         if(!path)
  79                 return 0;
  80         return access(path, R_OK) != -1;
  81 }
  82
  83 char *get_config_path(char* default_path, char* pbuf, size_t bufsize) {
  84         char buf[512];
  85         // top priority: user defined path
  86         char *path = default_path;
  87         if(check_path(path))
  88                 goto have;
  89
  90         // priority 1: env var PROXYCHAINS_CONF_FILE
  91         path = getenv(PROXYCHAINS_CONF_FILE_ENV_VAR);
  92         if(check_path(path))
  93                 goto have;
  94
  95         // priority 2; proxychains conf in actual dir
  96         path = getcwd(buf, sizeof(buf));
  97         snprintf(pbuf, bufsize, "%s/%s", path, PROXYCHAINS_CONF_FILE);
  98         path = pbuf;
  99         if(check_path(path))
 100                 goto have;
 101
 102         // priority 3; $HOME/.proxychains/proxychains.conf
 103         path = getenv("HOME");
 104         snprintf(pbuf, bufsize, "%s/.proxychains/%s", path, PROXYCHAINS_CONF_FILE);
 105         path = pbuf;
 106         if(check_path(path))
 107                 goto have;
 108
 109     // priority 3b: ~/config/settings/proxychains.conf (for haiku)
 110         path = getenv("HOME");
 111         snprintf(pbuf, bufsize, "%s/config/settings/%s", path, PROXYCHAINS_CONF_FILE);
 112         path = pbuf;
 113         if(check_path(path))
 114                 goto have;
 115
 116         // priority 4: $SYSCONFDIR/proxychains.conf
 117         path = SYSCONFDIR "/" PROXYCHAINS_CONF_FILE;
 118         if(check_path(path))
 119                 goto have;
 120
 121         // priority 5: /etc/proxychains.conf
 122         path = "/etc/" PROXYCHAINS_CONF_FILE;
 123         if(check_path(path))
 124                 goto have;
 125
 126         perror("couldnt find configuration file");
 127         exit(1);
 128
 129         return NULL;
 130         have:
 131         return path;
 132 }