Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / ipxe / src / net / icmpv4.c

diff --git a/qemu/roms/ipxe/src/net/icmpv4.c b/qemu/roms/ipxe/src/net/icmpv4.c
new file mode 100644 (file)
index 0000000..996ba14
--- /dev/null
+++ b/qemu/roms/ipxe/src/net/icmpv4.c
@@ -0,0 +1,109 @@
+/*
+ * 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 <ipxe/iobuf.h>
+#include <ipxe/in.h>
+#include <ipxe/tcpip.h>
+#include <ipxe/icmp.h>
+
+/** @file
+ *
+ * ICMPv4 protocol
+ *
+ */
+
+struct icmp_echo_protocol icmpv4_echo_protocol __icmp_echo_protocol;
+
+/**
+ * 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 icmpv4_rx ( struct io_buffer *iobuf,
+                      struct net_device *netdev __unused,
+                      struct sockaddr_tcpip *st_src,
+                      struct sockaddr_tcpip *st_dest __unused,
+                      uint16_t pshdr_csum __unused ) {
+       struct icmp_header *icmp = iobuf->data;
+       size_t len = iob_len ( iobuf );
+       unsigned int csum;
+       unsigned int type;
+       int rc;
+
+       /* Sanity check */
+       if ( len < sizeof ( *icmp ) ) {
+               DBG ( "ICMP packet too short at %zd bytes (min %zd bytes)\n",
+                     len, sizeof ( *icmp ) );
+               rc = -EINVAL;
+               goto discard;
+       }
+
+       /* Verify checksum */
+       csum = tcpip_chksum ( icmp, len );
+       if ( csum != 0 ) {
+               DBG ( "ICMP checksum incorrect (is %04x, should be 0000)\n",
+                     csum );
+               DBG_HD ( icmp, len );
+               rc = -EINVAL;
+               goto discard;
+       }
+
+       /* Handle ICMP packet */
+       type = icmp->type;
+       switch ( type ) {
+       case ICMP_ECHO_REQUEST:
+               return icmp_rx_echo_request ( iobuf, st_src,
+                                             &icmpv4_echo_protocol );
+       case ICMP_ECHO_REPLY:
+               return icmp_rx_echo_reply ( iobuf, st_src );
+       default:
+               DBG ( "ICMP ignoring type %d\n", type );
+               rc = 0;
+               break;
+       }
+
+ discard:
+       free_iob ( iobuf );
+       return rc;
+}
+
+/** ICMPv4 TCP/IP protocol */
+struct tcpip_protocol icmpv4_protocol __tcpip_protocol = {
+       .name = "ICMPv4",
+       .rx = icmpv4_rx,
+       .tcpip_proto = IP_ICMP,
+};
+
+/** ICMPv4 echo protocol */
+struct icmp_echo_protocol icmpv4_echo_protocol __icmp_echo_protocol = {
+       .family = AF_INET,
+       .request = ICMP_ECHO_REQUEST,
+       .reply = ICMP_ECHO_REPLY,
+       .tcpip_protocol = &icmpv4_protocol,
+       .net_checksum = 0,
+};