/*
  Example of how to define an environment for given trace file
  Trace file: smtp_client

  Values of previously defined variables (created in file smtp_client_defines) will be inserted in packets.
*/

// modification of packet with MAIL FROM command

getpac 8	// loads packet from file

CLEARHISTORY	// if not use this command new packet cannot become smaller than original

pos = tcp.data // the packet contains TCP options
pass 12  		// so don't use standart "tcp.data" field but make this offset

.td_command_name "MAIL From: "
.td_email  mail_from   // defined in smtp_client_defines
.td_rest " SIZE=834\r\n"	// writes new data to packet, the size of packet will be set after the written value

ip.len = IPlen	  // IP length has changed, mark it to be recalculated
tcp.crc = TCPcrc // TCP checksum has changed, mark it to be recalculated

setpac 8 // writes modified packet to file

// modification of packet with RCPT TO command

getpac 10	// loads packet from file

CLEARHISTORY	// if not use this command new packet cannot become smaller than original

pos = tcp.data // the packet contains TCP options
pass 12  		// so don't use standart "tcp.data" field but make this offset

.td_command_name "Rcpt To: "
.td_email  mail_to   // defined in smtp_client_defines
.td_newl_ine "\r\n"	// writes new data to packet, the size of packet will be set after the written value

ip.len = IPlen	  // IP length has changed, mark it to be recalculated
tcp.crc = TCPcrc // TCP checksum has changed, mark it to be recalculated

setpac 10 // writes modified packet to file