--- /dev/null
+/*
+ * Copyright (C) 2013 Michael Brown <mbrown@fensystems.co.uk>.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+#include <string.h>
+#include <errno.h>
+#include <byteswap.h>
+#include <ipxe/in.h>
+#include <ipxe/iobuf.h>
+#include <ipxe/tcpip.h>
+#include <ipxe/ping.h>
+#include <ipxe/icmpv6.h>
+
+/** @file
+ *
+ * ICMPv6 protocol
+ *
+ */
+
+struct icmp_echo_protocol icmpv6_echo_protocol __icmp_echo_protocol;
+
+/**
+ * Process received ICMPv6 echo request packet
+ *
+ * @v iobuf I/O buffer
+ * @v netdev Network device
+ * @v sin6_src Source socket address
+ * @v sin6_dest Destination socket address
+ * @ret rc Return status code
+ */
+static int icmpv6_rx_echo_request ( struct io_buffer *iobuf,
+ struct net_device *netdev __unused,
+ struct sockaddr_in6 *sin6_src,
+ struct sockaddr_in6 *sin6_dest __unused ) {
+ struct sockaddr_tcpip *st_src =
+ ( ( struct sockaddr_tcpip * ) sin6_src );
+
+ return icmp_rx_echo_request ( iobuf, st_src, &icmpv6_echo_protocol );
+}
+
+/** ICMPv6 echo request handler */
+struct icmpv6_handler icmpv6_echo_request_handler __icmpv6_handler = {
+ .type = ICMPV6_ECHO_REQUEST,
+ .rx = icmpv6_rx_echo_request,
+};
+
+/**
+ * Process received ICMPv6 echo reply packet
+ *
+ * @v iobuf I/O buffer
+ * @v netdev Network device
+ * @v sin6_src Source socket address
+ * @v sin6_dest Destination socket address
+ * @ret rc Return status code
+ */
+static int icmpv6_rx_echo_reply ( struct io_buffer *iobuf,
+ struct net_device *netdev __unused,
+ struct sockaddr_in6 *sin6_src,
+ struct sockaddr_in6 *sin6_dest __unused ) {
+ struct sockaddr_tcpip *st_src =
+ ( ( struct sockaddr_tcpip * ) sin6_src );
+
+ return icmp_rx_echo_reply ( iobuf, st_src );
+}
+
+/** ICMPv6 echo reply handler */
+struct icmpv6_handler icmpv6_echo_reply_handler __icmpv6_handler = {
+ .type = ICMPV6_ECHO_REPLY,
+ .rx = icmpv6_rx_echo_reply,
+};
+
+/**
+ * Identify ICMPv6 handler
+ *
+ * @v type ICMPv6 type
+ * @ret handler ICMPv6 handler, or NULL if not found
+ */
+static struct icmpv6_handler * icmpv6_handler ( unsigned int type ) {
+ struct icmpv6_handler *handler;
+
+ for_each_table_entry ( handler, ICMPV6_HANDLERS ) {
+ if ( handler->type == type )
+ return handler;
+ }
+ return NULL;
+}
+
+/**
+ * Process a received packet
+ *
+ * @v iobuf I/O buffer
+ * @v netdev Network device
+ * @v st_src Partially-filled source address
+ * @v st_dest Partially-filled destination address
+ * @v pshdr_csum Pseudo-header checksum
+ * @ret rc Return status code
+ */
+static int icmpv6_rx ( struct io_buffer *iobuf, struct net_device *netdev,
+ struct sockaddr_tcpip *st_src,
+ struct sockaddr_tcpip *st_dest, uint16_t pshdr_csum ) {
+ struct sockaddr_in6 *sin6_src = ( ( struct sockaddr_in6 * ) st_src );
+ struct sockaddr_in6 *sin6_dest = ( ( struct sockaddr_in6 * ) st_dest );
+ struct icmp_header *icmp = iobuf->data;
+ size_t len = iob_len ( iobuf );
+ struct icmpv6_handler *handler;
+ unsigned int csum;
+ int rc;
+
+ /* Sanity check */
+ if ( len < sizeof ( *icmp ) ) {
+ DBGC ( netdev, "ICMPv6 packet too short at %zd bytes (min %zd "
+ "bytes)\n", len, sizeof ( *icmp ) );
+ rc = -EINVAL;
+ goto done;
+ }
+
+ /* Verify checksum */
+ csum = tcpip_continue_chksum ( pshdr_csum, icmp, len );
+ if ( csum != 0 ) {
+ DBGC ( netdev, "ICMPv6 checksum incorrect (is %04x, should be "
+ "0000)\n", csum );
+ DBGC_HDA ( netdev, 0, icmp, len );
+ rc = -EINVAL;
+ goto done;
+ }
+
+ /* Identify handler */
+ handler = icmpv6_handler ( icmp->type );
+ if ( ! handler ) {
+ DBGC ( netdev, "ICMPv6 unrecognised type %d\n", icmp->type );
+ rc = -ENOTSUP;
+ goto done;
+ }
+
+ /* Pass to handler */
+ if ( ( rc = handler->rx ( iob_disown ( iobuf ), netdev, sin6_src,
+ sin6_dest ) ) != 0 ) {
+ DBGC ( netdev, "ICMPv6 could not handle type %d: %s\n",
+ icmp->type, strerror ( rc ) );
+ goto done;
+ }
+
+ done:
+ free_iob ( iobuf );
+ return rc;
+}
+
+/** ICMPv6 TCP/IP protocol */
+struct tcpip_protocol icmpv6_protocol __tcpip_protocol = {
+ .name = "ICMPv6",
+ .rx = icmpv6_rx,
+ .tcpip_proto = IP_ICMP6,
+};
+
+/** ICMPv6 echo protocol */
+struct icmp_echo_protocol icmpv6_echo_protocol __icmp_echo_protocol = {
+ .family = AF_INET6,
+ .request = ICMPV6_ECHO_REQUEST,
+ .reply = ICMPV6_ECHO_REPLY,
+ .tcpip_protocol = &icmpv6_protocol,
+ .net_checksum = 1,
+};
Code Review / kvmfornfv.git / blobdiff