#!/usr/sbin/dtrace -s

#pragma D option quiet

/*
 * Count the number of TCP payload bytes by remote host and local port.
 */

dtrace:::BEGIN
{
	printf("Tracing TCP payload bytes... Hit Ctrl-C to end.\n");
}

tcp:::receive
{
	@bytes[args[2]->ip_saddr, args[4]->tcp_dport] =
	    sum(args[2]->ip_plength - args[4]->tcp_offset);
}

tcp:::send
{
	@bytes[args[2]->ip_daddr, args[4]->tcp_sport] =
	    sum(args[2]->ip_plength - args[4]->tcp_offset);
}

dtrace:::END
{
	printf("  %-32s %-6s %16s\n", "REMOTE", "LPORT", "BYTES");
	printa("  %-32s %-6d %@16d\n", @bytes);
}