2 * Copyright (C) 2013 Michael Brown <mbrown@fensystems.co.uk>.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of the
7 * License, or any later version.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
19 * You can also choose to distribute this program under the terms of
20 * the Unmodified Binary Distribution Licence (as given in the file
21 * COPYING.UBDL), provided that you have satisfied its requirements.
24 FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
28 #include <ipxe/iobuf.h>
30 #include <ipxe/tcpip.h>
31 #include <ipxe/icmp.h>
39 struct icmp_echo_protocol icmpv4_echo_protocol __icmp_echo_protocol;
42 * Process a received packet
45 * @v netdev Network device
46 * @v st_src Partially-filled source address
47 * @v st_dest Partially-filled destination address
48 * @v pshdr_csum Pseudo-header checksum
49 * @ret rc Return status code
51 static int icmpv4_rx ( struct io_buffer *iobuf,
52 struct net_device *netdev __unused,
53 struct sockaddr_tcpip *st_src,
54 struct sockaddr_tcpip *st_dest __unused,
55 uint16_t pshdr_csum __unused ) {
56 struct icmp_header *icmp = iobuf->data;
57 size_t len = iob_len ( iobuf );
63 if ( len < sizeof ( *icmp ) ) {
64 DBG ( "ICMP packet too short at %zd bytes (min %zd bytes)\n",
65 len, sizeof ( *icmp ) );
71 csum = tcpip_chksum ( icmp, len );
73 DBG ( "ICMP checksum incorrect (is %04x, should be 0000)\n",
80 /* Handle ICMP packet */
83 case ICMP_ECHO_REQUEST:
84 return icmp_rx_echo_request ( iobuf, st_src,
85 &icmpv4_echo_protocol );
87 return icmp_rx_echo_reply ( iobuf, st_src );
89 DBG ( "ICMP ignoring type %d\n", type );
99 /** ICMPv4 TCP/IP protocol */
100 struct tcpip_protocol icmpv4_protocol __tcpip_protocol = {
103 .tcpip_proto = IP_ICMP,
106 /** ICMPv4 echo protocol */
107 struct icmp_echo_protocol icmpv4_echo_protocol __icmp_echo_protocol = {
109 .request = ICMP_ECHO_REQUEST,
110 .reply = ICMP_ECHO_REPLY,
111 .tcpip_protocol = &icmpv4_protocol,