dlls/rpcrt4/rpcrt4_main.c

   1 /*
   2  *  RPCRT4
   3  *
   4  */
   5
   6 #include "config.h"
   7
   8 #include "windef.h"
   9 #include "winerror.h"
  10 #include "winbase.h"
  11 #include "rpc.h"
  12
  13 #include <time.h>
  14 #include <sys/time.h>
  15 #include <unistd.h>
  16 #include <stdlib.h>
  17
  18 #ifdef HAVE_SYS_FILE_H
  19 # include <sys/file.h>
  20 #endif
  21 #include <sys/ioctl.h>
  22 #ifdef HAVE_SYS_SOCKET_H
  23 # include <sys/socket.h>
  24 #endif
  25 #ifdef HAVE_SYS_SOCKIO_H
  26 # include <sys/sockio.h>
  27 #endif
  28 #ifdef HAVE_NET_IF_H
  29 # include <net/if.h>
  30 #endif
  31 #ifdef HAVE_NETINET_IN_H
  32 # include <netinet/in.h>
  33 #endif
  34
  35 #include "debugtools.h"
  36
  37 DEFAULT_DEBUG_CHANNEL(ole);
  38
  39 /***********************************************************************
  40  * RPCRT4_LibMain
  41  *
  42  * PARAMS
  43  *     hinstDLL    [I] handle to the DLL's instance
  44  *     fdwReason   [I]
  45  *     lpvReserved [I] reserved, must be NULL
  46  *
  47  * RETURNS
  48  *     Success: TRUE
  49  *     Failure: FALSE
  50  */
  51
  52 static DWORD RPCRT4_dwProcessesAttached = 0;
  53
  54 BOOL WINAPI
  55 RPCRT4_LibMain (HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
  56 {
  57     switch (fdwReason) {
  58     case DLL_PROCESS_ATTACH:
  59         RPCRT4_dwProcessesAttached++;
  60         break;
  61
  62     case DLL_PROCESS_DETACH:
  63         RPCRT4_dwProcessesAttached--;
  64         break;
  65     }
  66
  67     return TRUE;
  68 }
  69
  70 /*************************************************************************
  71  *           UuidCreate   [RPCRT4]
  72  *
  73  * Creates a 128bit UUID.
  74  * Implemented according the DCE specification for UUID generation.
  75  * Code is based upon uuid library in e2fsprogs by Theodore Ts'o.
  76  * Copyright (C) 1996, 1997 Theodore Ts'o.
  77  *
  78  * RETURNS
  79  *
  80  *  S_OK if successful.
  81  */
  82 RPC_STATUS RPC_ENTRY UuidCreate(UUID *Uuid)
  83 {
  84    static char has_init = 0;
  85    unsigned char a[6];
  86    static int                      adjustment = 0;
  87    static struct timeval           last = {0, 0};
  88    static UINT16                   clock_seq;
  89    struct timeval                  tv;
  90    unsigned long long              clock_reg;
  91    UINT clock_high, clock_low;
  92    UINT16 temp_clock_seq, temp_clock_mid, temp_clock_hi_and_version;
  93 #ifdef HAVE_NET_IF_H
  94    int             sd;
  95    struct ifreq    ifr, *ifrp;
  96    struct ifconf   ifc;
  97    char buf[1024];
  98    int             n, i;
  99 #endif
 100
 101    /* Have we already tried to get the MAC address? */
 102    if (!has_init) {
 103 #ifdef HAVE_NET_IF_H
 104       /* BSD 4.4 defines the size of an ifreq to be
 105        * max(sizeof(ifreq), sizeof(ifreq.ifr_name)+ifreq.ifr_addr.sa_len
 106        * However, under earlier systems, sa_len isn't present, so
 107        *  the size is just sizeof(struct ifreq)
 108        */
 109 #ifdef HAVE_SA_LEN
 110 #  ifndef max
 111 #   define max(a,b) ((a) > (b) ? (a) : (b))
 112 #  endif
 113 #  define ifreq_size(i) max(sizeof(struct ifreq),\
 114 sizeof((i).ifr_name)+(i).ifr_addr.sa_len)
 115 # else
 116 #  define ifreq_size(i) sizeof(struct ifreq)
 117 # endif /* HAVE_SA_LEN */
 118
 119       sd = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP);
 120       if (sd < 0) {
 121          /* if we can't open a socket, just use random numbers */
 122          /* set the multicast bit to prevent conflicts with real cards */
 123          a[0] = (rand() & 0xff) | 0x80;
 124          a[1] = rand() & 0xff;
 125          a[2] = rand() & 0xff;
 126          a[3] = rand() & 0xff;
 127          a[4] = rand() & 0xff;
 128          a[5] = rand() & 0xff;
 129       } else {
 130          memset(buf, 0, sizeof(buf));
 131          ifc.ifc_len = sizeof(buf);
 132          ifc.ifc_buf = buf;
 133          /* get the ifconf interface */
 134          if (ioctl (sd, SIOCGIFCONF, (char *)&ifc) < 0) {
 135             close(sd);
 136             /* no ifconf, so just use random numbers */
 137             /* set the multicast bit to prevent conflicts with real cards */
 138             a[0] = (rand() & 0xff) | 0x80;
 139             a[1] = rand() & 0xff;
 140             a[2] = rand() & 0xff;
 141             a[3] = rand() & 0xff;
 142             a[4] = rand() & 0xff;
 143             a[5] = rand() & 0xff;
 144          } else {
 145             /* loop through the interfaces, looking for a valid one */
 146             n = ifc.ifc_len;
 147             for (i = 0; i < n; i+= ifreq_size(*ifr) ) {
 148                ifrp = (struct ifreq *)((char *) ifc.ifc_buf+i);
 149                strncpy(ifr.ifr_name, ifrp->ifr_name, IFNAMSIZ);
 150                /* try to get the address for this interface */
 151 # ifdef SIOCGIFHWADDR
 152                if (ioctl(sd, SIOCGIFHWADDR, &ifr) < 0)
 153                    continue;
 154                memcpy(a, (unsigned char *)&ifr.ifr_hwaddr.sa_data, 6);
 155 # else
 156 #  ifdef SIOCGENADDR
 157                if (ioctl(sd, SIOCGENADDR, &ifr) < 0)
 158                    continue;
 159                memcpy(a, (unsigned char *) ifr.ifr_enaddr, 6);
 160 #  else
 161                /* XXX we don't have a way of getting the hardware address */
 162                close(sd);
 163                a[0] = 0;
 164                break;
 165 #  endif /* SIOCGENADDR */
 166 # endif /* SIOCGIFHWADDR */
 167                /* make sure it's not blank */
 168                if (!a[0] && !a[1] && !a[2] && !a[3] && !a[4] && !a[5])
 169                    continue;
 170
 171                goto valid_address;
 172             }
 173             /* if we didn't find a valid address, make a random one */
 174             /* once again, set multicast bit to avoid conflicts */
 175             a[0] = (rand() & 0xff) | 0x80;
 176             a[1] = rand() & 0xff;
 177             a[2] = rand() & 0xff;
 178             a[3] = rand() & 0xff;
 179             a[4] = rand() & 0xff;
 180             a[5] = rand() & 0xff;
 181
 182             valid_address:
 183             close(sd);
 184          }
 185       }
 186 #else
 187       /* no networking info, so generate a random address */
 188       a[0] = (rand() & 0xff) | 0x80;
 189       a[1] = rand() & 0xff;
 190       a[2] = rand() & 0xff;
 191       a[3] = rand() & 0xff;
 192       a[4] = rand() & 0xff;
 193       a[5] = rand() & 0xff;
 194 #endif /* HAVE_NET_IF_H */
 195       has_init = 1;
 196    }
 197
 198    /* generate time element of GUID */
 199
 200    /* Assume that the gettimeofday() has microsecond granularity */
 201 #define MAX_ADJUSTMENT 10
 202
 203    try_again:
 204    gettimeofday(&tv, 0);
 205    if ((last.tv_sec == 0) && (last.tv_usec == 0)) {
 206       clock_seq = ((rand() & 0xff) << 8) + (rand() & 0xff);
 207       clock_seq &= 0x1FFF;
 208       last = tv;
 209       last.tv_sec--;
 210    }
 211    if ((tv.tv_sec < last.tv_sec) ||
 212        ((tv.tv_sec == last.tv_sec) &&
 213         (tv.tv_usec < last.tv_usec))) {
 214       clock_seq = (clock_seq+1) & 0x1FFF;
 215       adjustment = 0;
 216    } else if ((tv.tv_sec == last.tv_sec) &&
 217               (tv.tv_usec == last.tv_usec)) {
 218       if (adjustment >= MAX_ADJUSTMENT)
 219           goto try_again;
 220       adjustment++;
 221    } else
 222        adjustment = 0;
 223
 224    clock_reg = tv.tv_usec*10 + adjustment;
 225    clock_reg += ((unsigned long long) tv.tv_sec)*10000000;
 226    clock_reg += (((unsigned long long) 0x01B21DD2) << 32) + 0x13814000;
 227
 228    clock_high = clock_reg >> 32;
 229    clock_low = clock_reg;
 230    temp_clock_seq = clock_seq | 0x8000;
 231    temp_clock_mid = (UINT16)clock_high;
 232    temp_clock_hi_and_version = (clock_high >> 16) | 0x1000;
 233
 234    /* pack the information into the GUID structure */
 235
 236    ((unsigned char*)&Uuid->Data1)[3] = (unsigned char)clock_low;
 237    clock_low >>= 8;
 238    ((unsigned char*)&Uuid->Data1)[2] = (unsigned char)clock_low;
 239    clock_low >>= 8;
 240    ((unsigned char*)&Uuid->Data1)[1] = (unsigned char)clock_low;
 241    clock_low >>= 8;
 242    ((unsigned char*)&Uuid->Data1)[0] = (unsigned char)clock_low;
 243
 244    ((unsigned char*)&Uuid->Data2)[1] = (unsigned char)temp_clock_mid;
 245    temp_clock_mid >>= 8;
 246    ((unsigned char*)&Uuid->Data2)[0] = (unsigned char)temp_clock_mid;
 247
 248    ((unsigned char*)&Uuid->Data3)[1] = (unsigned char)temp_clock_hi_and_version;
 249    temp_clock_hi_and_version >>= 8;
 250    ((unsigned char*)&Uuid->Data3)[0] = (unsigned char)temp_clock_hi_and_version;
 251
 252    ((unsigned char*)Uuid->Data4)[1] = (unsigned char)temp_clock_seq;
 253    temp_clock_seq >>= 8;
 254    ((unsigned char*)Uuid->Data4)[0] = (unsigned char)temp_clock_seq;
 255
 256    ((unsigned char*)Uuid->Data4)[2] = a[0];
 257    ((unsigned char*)Uuid->Data4)[3] = a[1];
 258    ((unsigned char*)Uuid->Data4)[4] = a[2];
 259    ((unsigned char*)Uuid->Data4)[5] = a[3];
 260    ((unsigned char*)Uuid->Data4)[6] = a[4];
 261    ((unsigned char*)Uuid->Data4)[7] = a[5];
 262
 263    TRACE("%s", debugstr_guid(Uuid));
 264
 265    return S_OK;
 266 }