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865 bytes added ,  23:53, 23 January 2018
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== Initalize ==
 
== Initalize ==
   −
Takes a [[#BsdConfig]] (made-up name), the PID, the size of the transfer memory and a copy-handle of the latter.
+
Takes a [[#BsdBufferConfig]] (made-up name), the PID, the size of the transfer memory and a copy-handle of the latter.
   −
=== BsdConfig ===
+
=== BsdBufferConfig ===
 +
 
 +
/// Configuration structure for bsdInitalize
 
  typedef struct  {
 
  typedef struct  {
     u32 version;                   ///< Observed 1 on 2.0 LibAppletWeb, 2 on 3.0.
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     u32 version;               ///< Observed 1 on 2.0 LibAppletWeb, 2 on 3.0.
     u32 tcpSendBufferSize;         ///< Size of the TCP send buffer (initial or fixed).
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     u32 tcpReceiveBufferSize;       ///< Size of the TCP recieve buffer (initial or fixed).
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     u32 tcp_tx_buf_size;       ///< Size of the TCP transfer (send) buffer (initial or fixed).
     u32 tcpSendBufferMaxSize;       ///< Maximum size of the TCP send buffer. If it is 0, the initial size of the buffer is actually fixed.
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     u32 tcp_rx_buf_size;       ///< Size of the TCP recieve buffer (initial or fixed).
     u32 tcpReceiveBufferMaxSize;    ///< Maximum size of the TCP receive buffer. If it is 0, the initial size of the buffer is actually fixed.
+
     u32 tcp_tx_buf_max_size;   ///< Maximum size of the TCP transfer (send) buffer. If it is 0, the size of the buffer is fixed to its initial value.
     u32 udpSendBufferSize;         ///< Size of the TCP send buffer (typically 0x2400 bytes).
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     u32 tcp_rx_buf_max_size;    ///< Maximum size of the TCP receive buffer. If it is 0, the size of the buffer is fixed to its initial value.
     u32 udpSendBufferSize;         ///< Size of the TCP send buffer (typically 0xA500 bytes).
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     s32 socketBufferEffiency;       ///< Number of buffers for each socket (standard values range from 1 to 8).
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     u32 udp_tx_buf_size;       ///< Size of the UDP transfer (send) buffer (typically 0x2400 bytes).
  } BsdConfig;
+
     u32 udp_rx_buf_size;       ///< Size of the UDP receive buffer (typically 0xA500 bytes).
 +
 +
     u32 sb_efficiency;         ///< Number of buffers for each socket (standard values range from 1 to 8).
 +
  } BsdBufferConfig;
 +
 
 +
 
 +
The transfer memory must be larger than a the computed size below. Should the transfer memory be smaller than that, the BSD sockets service would only send ZeroWindow packets (for TCP), resulting in a transfer rate not exceeding 1 byte/s.
 +
 
 +
static size_t _bsdGetTransferMemSizeForConfig(const BsdConfig *config)
 +
{
 +
    u32 tcp_tx_buf_max_size = config->tcp_tx_buf_max_size != 0 ? config->tcp_tx_buf_max_size : config->tcp_tx_buf_size;
 +
    u32 tcp_rx_buf_max_size = config->tcp_rx_buf_max_size != 0 ? config->tcp_rx_buf_max_size : config->tcp_rx_buf_size;
 +
    u32 sum = tcp_tx_buf_max_size + tcp_rx_buf_max_size + config->udp_tx_buf_size + config->udp_rx_buf_size;
 +
 +
    sum = ((sum + 0xFFF) >> 12) << 12; // page round-up
 +
    return (size_t)(config->sb_efficiency * sum);
 +
}
    
= sfdnsres =
 
= sfdnsres =
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