src/kits/network/init.cpp

   1 /*
   2  * Copyright 2006-2010, Haiku, Inc. All Rights Reserved.
   3  * Distributed under the terms of the MIT License.
   4  *
   5  * Authors:
   6  *              Axel Dörfler, axeld@pinc-software.de
   7  *              Oliver Tappe, zooey@hirschkaefer.de
   8  */
   9
  10
  11 #include <libroot_private.h>
  12
  13 #include <OS.h>
  14 #include <image.h>
  15
  16 #include <string.h>
  17
  18
  19 bool __gR5Compatibility = false;
  20 addr_t __gNetworkStart;
  21 addr_t __gNetworkEnd;
  22 addr_t __gNetAPIStart;
  23 addr_t __gNetAPIEnd;
  24
  25
  26 static void
  27 find_own_image()
  28 {
  29         int32 cookie = 0;
  30         image_info info;
  31         while (get_next_image_info(B_CURRENT_TEAM, &cookie, &info) == B_OK) {
  32                 if (((addr_t)info.text <= (addr_t)find_own_image
  33                         && (addr_t)info.text + (addr_t)info.text_size
  34                                 > (addr_t)find_own_image)) {
  35                         // found us
  36                         __gNetworkStart = (addr_t)min_c(info.text, info.data);
  37                         __gNetworkEnd = min_c((addr_t)info.text + info.text_size,
  38                                 (addr_t)info.data + info.data_size);
  39                         break;
  40                 }
  41         }
  42 }
  43
  44
  45 extern "C" void
  46 initialize_before()
  47 {
  48         // determine if we have to run in BeOS compatibility mode
  49
  50         // get image of executable
  51         image_info info;
  52         uint32 cookie = 0;
  53         if (get_next_image_info(B_CURRENT_TEAM, (int32*)&cookie, &info) != B_OK)
  54                 return;
  55
  56         if (get_image_symbol(info.id, "__gHaikuStartupCode", B_SYMBOL_TYPE_DATA,
  57                         NULL) == B_OK) {
  58                 // we were linked on/for Haiku
  59                 return;
  60         }
  61
  62         // We're using the BeOS startup code, check if BONE libraries are in
  63         // use, and if not, enable the BeOS R5 compatibility layer.
  64         // As dependencies to network libraries may be "hidden" in libraries, we
  65         // may have to scan not only the executable, but every loaded image.
  66         int enable = 0;
  67         uint32 crumble;
  68         const char *name;
  69         do {
  70                 crumble = 0;
  71                 while (__get_next_image_dependency(info.id, &crumble, &name) == B_OK) {
  72                         if (!strcmp(name, "libbind.so")
  73                                 || !strcmp(name, "libsocket.so")
  74                                 || !strcmp(name, "libbnetapi.so")
  75                                 || !strcmp(name, "libnetwork.so"))
  76                                 enable -= 2;
  77                         else if (!strcmp(name, "libnet.so")
  78                                 || !strcmp(name, "libnetapi.so"))
  79                                 enable++;
  80                 }
  81
  82                 if (enable > 0) {
  83                         __gR5Compatibility = true;
  84                         find_own_image();
  85                         debug_printf("libnetwork.so running in R5 compatibility mode.\n");
  86                         return;
  87                 }
  88         } while (enable == 0
  89                 && get_next_image_info(B_CURRENT_TEAM, (int32*)&cookie, &info) == B_OK);
  90 }