hi,
is it possible to use a Socket (proto_udp) and recieve icmp messages ?
what i want to do is, send a datagram to a remote host/port and check if
the host replies with port_unreachabl e (i think icmp type 3).
is this possible with a udp Socket and the RecieveFrom() method ?.
another approach would be (at least thats what i think) to use a raw
socket with proto_udp.
is this a wrong way to go ?
thanks
3  1398 
Bernd schrieb: hi,
is it possible to use a Socket (proto_udp) and recieve icmp messages ?
what i want to do is, send a datagram to a remote host/port and check if
the host replies with port_unreachabl e (i think icmp type 3).
is this possible with a udp Socket and the RecieveFrom() method ?.
another approach would be (at least thats what i think) to use a raw
socket with proto_udp.
is this a wrong way to go ?
thanks
Hi,
hhmmm, I think ICMP messages are not sent through UDP. So, I'm not sure
but I think its not possible to do that with a UDP Socket.
Yours sincerely
Andy
Andy Schmidt schrieb: Bernd schrieb:
hi,
is it possible to use a Socket (proto_udp) and recieve icmp messages ?
what i want to do is, send a datagram to a remote host/port and check if
the host replies with port_unreachabl e (i think icmp type 3).
is this possible with a udp Socket and the RecieveFrom() method ?.
another approach would be (at least thats what i think) to use a raw
socket with proto_udp.
is this a wrong way to go ?
thanks
Hi,
hhmmm, I think ICMP messages are not sent through UDP. So, I'm not sure
but I think its not possible to do that with a UDP Socket.
Yours sincerely
Andy
ok, thanks for your answer. and yes you are right, icmp is not sent
through udp.
would it be possible to work with 2 sockets ? lets say i create an udp
socket, send a dgram and recieve the reply with a raw socket
proto_type_icmp ?
thanks
Bernd schrieb:
Andy Schmidt schrieb:
Bernd schrieb:
hi,
is it possible to use a Socket (proto_udp) and recieve icmp messages ?
what i want to do is, send a datagram to a remote host/port and check if
the host replies with port_unreachabl e (i think icmp type 3).
is this possible with a udp Socket and the RecieveFrom() method ?.
another approach would be (at least thats what i think) to use a raw
socket with proto_udp.
is this a wrong way to go ?
thanks
Hi,
hhmmm, I think ICMP messages are not sent through UDP. So, I'm not sure
but I think its not possible to do that with a UDP Socket.
Yours sincerely
Andy
ok, thanks for your answer. and yes you are right, icmp is not sent
through udp.
would it be possible to work with 2 sockets ? lets say i create an udp
socket, send a dgram and recieve the reply with a raw socket
proto_type_icmp ?
thanks
Hi,
ok, I've looked in W. Richard Stevens book "TCP/IP Volume 1" and found
out, that you can use the UDP Socket to receive the ICMP reply of your
sent datagram. In the ICMP message the IP-Header and the first 8 bytes
of the IP-Data are transmitted. And Stevens wrote: the ICMP module can
assiciate with this information an UDP Port and respectivly a process
with the ICMP reply.
Yours sincerely
Andy This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
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