Line data    Source code

       1             : /*
       2             :  * Copyright (c) 1995, 1996, 1997, 1998 Kungliga Tekniska Högskolan
       3             :  * (Royal Institute of Technology, Stockholm, Sweden).
       4             :  * All rights reserved.
       5             :  *
       6             :  * Redistribution and use in source and binary forms, with or without
       7             :  * modification, are permitted provided that the following conditions
       8             :  * are met:
       9             :  *
      10             :  * 1. Redistributions of source code must retain the above copyright
      11             :  *    notice, this list of conditions and the following disclaimer.
      12             :  *
      13             :  * 2. Redistributions in binary form must reproduce the above copyright
      14             :  *    notice, this list of conditions and the following disclaimer in the
      15             :  *    documentation and/or other materials provided with the distribution.
      16             :  *
      17             :  * 3. Neither the name of the Institute nor the names of its contributors
      18             :  *    may be used to endorse or promote products derived from this software
      19             :  *    without specific prior written permission.
      20             :  *
      21             :  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
      22             :  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
      23             :  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
      24             :  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
      25             :  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
      26             :  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
      27             :  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
      28             :  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
      29             :  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
      30             :  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
      31             :  * SUCH DAMAGE.
      32             :  */
      33             : 
      34             : #include <config.h>
      35             : 
      36             : #include "roken.h"
      37             : 
      38             : /*
      39             :  * Like read but never return partial data.
      40             :  */
      41             : 
      42             : #ifndef _WIN32
      43             : 
      44             : ROKEN_LIB_FUNCTION ssize_t ROKEN_LIB_CALL
      45       46654 : net_read (rk_socket_t fd, void *buf, size_t nbytes)
      46             : {
      47       46654 :     char *cbuf = (char *)buf;
      48        1950 :     ssize_t count;
      49       46654 :     size_t rem = nbytes;
      50             : 
      51      130098 :     while (rem > 0) {
      52       83444 :         count = read (fd, cbuf, rem);
      53       83444 :         if (count < 0) {
      54           0 :             if (errno == EINTR)
      55           0 :                 continue;
      56             :             else
      57           0 :                 return count;
      58       83444 :         } else if (count == 0) {
      59           0 :             return count;
      60             :         }
      61       83444 :         cbuf += count;
      62       83444 :         rem -= count;
      63             :     }
      64       46654 :     return nbytes;
      65             : }
      66             : 
      67             : #else
      68             : 
      69             : ROKEN_LIB_FUNCTION ssize_t ROKEN_LIB_CALL
      70             : net_read(rk_socket_t sock, void *buf, size_t nbytes)
      71             : {
      72             :     char *cbuf = (char *)buf;
      73             :     ssize_t count;
      74             :     size_t rem = nbytes;
      75             : 
      76             : #ifdef SOCKET_IS_NOT_AN_FD
      77             :     int use_read = 0;
      78             : #endif
      79             : 
      80             :     while (rem > 0) {
      81             : #ifdef SOCKET_IS_NOT_AN_FD
      82             :         if (use_read)
      83             :             count = _read (sock, cbuf, rem);
      84             :         else
      85             :             count = recv (sock, cbuf, rem, 0);
      86             : 
      87             :         if (use_read == 0 &&
      88             :             rk_IS_SOCKET_ERROR(count) &&
      89             :             (rk_SOCK_ERRNO == WSANOTINITIALISED ||
      90             :              rk_SOCK_ERRNO == WSAENOTSOCK)) {
      91             :             use_read = 1;
      92             : 
      93             :             count = _read (sock, cbuf, rem);
      94             :         }
      95             : #else
      96             :         count = recv (sock, cbuf, rem, 0);
      97             : #endif
      98             :         if (count < 0) {
      99             : 
     100             :             /* With WinSock, the error EINTR (WSAEINTR), is used to
     101             :                indicate that a blocking call was cancelled using
     102             :                WSACancelBlockingCall(). */
     103             : 
     104             : #ifndef HAVE_WINSOCK
     105             :             if (rk_SOCK_ERRNO == EINTR)
     106             :                 continue;
     107             : #endif
     108             :             return count;
     109             :         } else if (count == 0) {
     110             :             return count;
     111             :         }
     112             :         cbuf += count;
     113             :         rem -= count;
     114             :     }
     115             :     return nbytes;
     116             : }
     117             : 
     118             : #endif