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Function silc_packet_send_prepare SYNOPSIS
        bool silc_packet_send_prepare(SilcSocketConnection sock,
                                      SilcUInt32 header_len,
                                      SilcUInt32 pad_len,
                                      SilcUInt32 data_len,
                                      SilcHmac hmac,
                                      const SilcBuffer packet);
DESCRIPTION
        This function can be used to prepare the outgoing data buffer in
        the socket connection specified by `sock' for packet sending.
        This is used internally by packet sending routines, but application
        may call this if it doesn't call silc_packet_assemble function.
        If that function is called then application must not call this since
        that function calls this internally.

        This returns the prepared data area into the `packet' pointer provided
        caller, which can be used then to add data to it, and later encrypt
        it.  The `packet' includes reference to the socket connection's
        outgoing buffer.  The `packet' may be freely modified (like
        encrypted etc.) but it must not be freed, since it is reference from
        `sock' outgoing buffer, and it is const.
Packet Protocol Interface SilcPacketType SilcPacketVersion SilcPacketFlags SilcPacketContext SilcPacketParserContext SilcPacketParserCallback SILC_PACKET_LENGTH SILC_PACKET_DATALEN SILC_PACKET_PADLEN SILC_PACKET_PADLEN_MAX silc_packet_send silc_packet_encrypt silc_packet_assemble silc_packet_send_prepare silc_packet_receive silc_packet_receive_process silc_packet_parse silc_packet_parse_special silc_packet_context_alloc silc_packet_context_dup silc_packet_context_free

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