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 write but blocking sockets never return partial data, i.e. we retry on
      40             :  * EINTR.  With non-blocking sockets (EWOULDBLOCK or EAGAIN) we return the
      41             :  * number of bytes written.
      42             :  */
      43             : 
      44             : #ifndef _WIN32
      45             : 
      46             : ROKEN_LIB_FUNCTION ssize_t ROKEN_LIB_CALL
      47       38193 : net_write (rk_socket_t fd, const void *buf, size_t nbytes)
      48             : {
      49       38193 :     const char *cbuf = (const char *)buf;
      50        1658 :     ssize_t count;
      51       38193 :     size_t rem = nbytes;
      52             : 
      53      112895 :     while (rem > 0) {
      54       74702 :         count = write (fd, cbuf, rem);
      55       74702 :         if (count < 0) {
      56           0 :             switch (errno) {
      57           0 :             case EINTR:
      58           0 :                 continue;
      59             : #if defined(EAGAIN) && EAGAIN != EWOULDBLOCK
      60             :             case EAGAIN:
      61             : #endif
      62           0 :             case EWOULDBLOCK:
      63           0 :                 return nbytes - rem;
      64           0 :             default:
      65           0 :                 return count;
      66             :             }
      67             :         }
      68       74702 :         cbuf += count;
      69       74702 :         rem -= count;
      70             :     }
      71       38193 :     return nbytes;
      72             : }
      73             : 
      74             : #else /* defined(_WIN32) */
      75             : 
      76             : ROKEN_LIB_FUNCTION ssize_t ROKEN_LIB_CALL
      77             : net_write(rk_socket_t sock, const void *buf, size_t nbytes)
      78             : {
      79             :     const char *cbuf = (const char *)buf;
      80             :     ssize_t count;
      81             :     size_t rem = nbytes;
      82             : #ifdef SOCKET_IS_NOT_AN_FD
      83             :     int use_write = 0;
      84             : #endif
      85             : 
      86             :     while (rem > 0) {
      87             : #ifdef SOCKET_IS_NOT_AN_FD
      88             :         if (use_write)
      89             :             count = _write (sock, cbuf, rem);
      90             :         else
      91             :             count = send (sock, cbuf, rem, 0);
      92             : 
      93             :         if (use_write == 0 &&
      94             :             rk_IS_SOCKET_ERROR(count) &&
      95             :             (rk_SOCK_ERRNO == WSANOTINITIALISED ||
      96             :              rk_SOCK_ERRNO == WSAENOTSOCK)) {
      97             :             use_write = 1;
      98             : 
      99             :             count = _write (sock, cbuf, rem);
     100             :         }
     101             : #else
     102             :         count = send (sock, cbuf, rem, 0);
     103             : #endif
     104             :         if (count < 0) {
     105             : #ifdef SOCKET_IS_NOT_AN_FD
     106             :             if (!use_write) {
     107             :                 switch (rk_SOCK_ERRNO) {
     108             :                 case WSAEINTR:
     109             :                     continue;
     110             :                 case WSAEWOULDBLOCK:
     111             :                     return nbytes - rem;
     112             :                 default:
     113             :                     return count;
     114             :                 }
     115             :             } else
     116             : #endif
     117             :             {
     118             :                 switch (errno) {
     119             :                 case EINTR:
     120             :                     continue;
     121             :                 case EWOULDBLOCK:
     122             :                     return nbytes - rem;
     123             :                 default:
     124             :                     return count;
     125             :                 }
     126             :             }
     127             :         }
     128             :         cbuf += count;
     129             :         rem -= count;
     130             :     }
     131             :     return nbytes;
     132             : }
     133             : 
     134             : #endif