Add new protocol to the ns-2

Add New Protocol
Modified folders: ns-2/apps/X.cc, X.h , ns-2/common/packet.h, ns-2/tcl/lib/ns-default.tcl, ns-packet.tcl

1.Copied X.cc and X.h as ping.cc and ping.h and we pasted them under ns-allin-one/ns-2/apps.
2.Defined X packet type in packet.h
enum packet_t
….
PT_X,
// insert new packet types here
PT_NTYPE // This MUST be the LAST one
};
class p_info {
public:
p_info() {
….
name_[PT_X]= “x”;
name_[PT_NTYPE]= “undefined”;
}
static bool data_packet(packet_t type) {
return (
….
(type) == PT_HDLC || \
(type) == PT_X \
);
#define DATA_PACKET(type) (
….
(type) == PT_SCTP_APP1 || \
(type) == PT_X \
)
3.Defined default value of X agent in ns-default.tcl
Agent/X set packet_size 51

4.Defined new packet type in ns-packet.tcl.
foreach prot {
….
# Other:
….
X
}
5.Wrote “x.o” in Makefile
apps/ping.o apps/x.o
6.Went to the directory where is the ns2, run “make” command to configure the ns-2