libmicrohttpd2

HTTP server C library (MHD 2.x, alpha)
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mhd_recv.c (4309B)

      1 /* SPDX-License-Identifier: LGPL-2.1-or-later OR (GPL-2.0-or-later WITH eCos-exception-2.0) */
      2 /*
      3   This file is part of GNU libmicrohttpd.
      4   Copyright (C) 2024 Evgeny Grin (Karlson2k)
      5 
      6   GNU libmicrohttpd is free software; you can redistribute it and/or
      7   modify it under the terms of the GNU Lesser General Public
      8   License as published by the Free Software Foundation; either
      9   version 2.1 of the License, or (at your option) any later version.
     10 
     11   GNU libmicrohttpd is distributed in the hope that it will be useful,
     12   but WITHOUT ANY WARRANTY; without even the implied warranty of
     13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     14   Lesser General Public License for more details.
     15 
     16   Alternatively, you can redistribute GNU libmicrohttpd and/or
     17   modify it under the terms of the GNU General Public License as
     18   published by the Free Software Foundation; either version 2 of
     19   the License, or (at your option) any later version, together
     20   with the eCos exception, as follows:
     21 
     22     As a special exception, if other files instantiate templates or
     23     use macros or inline functions from this file, or you compile this
     24     file and link it with other works to produce a work based on this
     25     file, this file does not by itself cause the resulting work to be
     26     covered by the GNU General Public License. However the source code
     27     for this file must still be made available in accordance with
     28     section (3) of the GNU General Public License v2.
     29 
     30     This exception does not invalidate any other reasons why a work
     31     based on this file might be covered by the GNU General Public
     32     License.
     33 
     34   You should have received copies of the GNU Lesser General Public
     35   License and the GNU General Public License along with this library;
     36   if not, see <https://www.gnu.org/licenses/>.
     37 */
     38 
     39 /**
     40  * @file src/mhd2/mhd_recv.c
     41  * @brief  The implementation of the mhd_recv() function
     42  * @author Karlson2k (Evgeny Grin)
     43  */
     44 
     45 #include "mhd_sys_options.h"
     46 
     47 #include "mhd_connection.h"
     48 
     49 #include "mhd_assert.h"
     50 
     51 #ifdef MHD_SUPPORT_HTTPS
     52 #  include "mhd_tls_funcs.h"
     53 #endif
     54 
     55 #include "sckt_recv.h"
     56 
     57 #include "mhd_recv.h"
     58 
     59 
     60 #ifdef MHD_SUPPORT_HTTPS
     61 
     62 static MHD_FN_PAR_NONNULL_ALL_
     63 MHD_FN_PAR_OUT_SIZE_ (3,2) MHD_FN_PAR_OUT_ (4) enum mhd_SocketError
     64 mhd_recv_tls (struct MHD_Connection *restrict c,
     65               size_t buf_size,
     66               char buf[MHD_FN_PAR_DYN_ARR_SIZE_ (buf_size)],
     67               size_t *restrict received)
     68 {
     69   /* TLS connection */
     70   enum mhd_SocketError res;
     71 
     72   mhd_assert (mhd_C_HAS_TLS (c));
     73   mhd_assert (0 != buf_size);
     74 
     75   res = mhd_tls_conn_recv (c->tls,
     76                            buf_size,
     77                            buf,
     78                            received);
     79   c->tls_has_data_in = mhd_TLS_BUF_NO_DATA; /* Updated with the actual value below */
     80 
     81   if (mhd_SOCKET_ERR_AGAIN == res)
     82     c->sk.ready = (enum mhd_SocketNetState) /* Clear 'recv-ready' */
     83                   (((unsigned int) c->sk.ready)
     84                    & (~(enum mhd_SocketNetState)
     85                       mhd_SOCKET_NET_STATE_RECV_READY));
     86   else if (mhd_SOCKET_ERR_NO_ERROR == res)
     87   {
     88     if (! c->sk.props.is_nonblck)
     89       c->sk.ready = (enum mhd_SocketNetState) /* Clear 'recv-ready' */
     90                     (((unsigned int) c->sk.ready)
     91                      & (~(enum mhd_SocketNetState)
     92                         mhd_SOCKET_NET_STATE_RECV_READY));
     93     if (*received == buf_size)
     94     {
     95       if (mhd_tls_conn_has_data_in (c->tls))
     96         c->tls_has_data_in = mhd_TLS_BUF_HAS_DATA_IN;
     97     }
     98 #ifndef NDEBUG
     99     else
    100       mhd_assert (! mhd_tls_conn_has_data_in (c->tls));
    101 #endif
    102   }
    103 
    104   return res;
    105 }
    106 
    107 
    108 #endif /* MHD_SUPPORT_HTTPS */
    109 
    110 MHD_INTERNAL MHD_FN_PAR_NONNULL_ALL_
    111 MHD_FN_PAR_OUT_SIZE_ (3,2) MHD_FN_PAR_OUT_ (4) enum mhd_SocketError
    112 mhd_recv (struct MHD_Connection *restrict c,
    113           size_t buf_size,
    114           char buf[MHD_FN_PAR_DYN_ARR_SIZE_ (buf_size)],
    115           size_t *restrict received)
    116 {
    117   mhd_assert (mhd_HTTP_STAGE_CLOSED != c->stage);
    118 
    119 #ifdef MHD_SUPPORT_HTTPS
    120   if (mhd_C_HAS_TLS (c))
    121     return mhd_recv_tls (c,
    122                          buf_size,
    123                          buf,
    124                          received);
    125 #endif /* MHD_SUPPORT_HTTPS */
    126 
    127   return mhd_sckt_recv (&(c->sk),
    128                         buf_size,
    129                         buf,
    130                         received);
    131 }