mirror of https://github.com/ipxe/ipxe.git
260 lines
7.6 KiB
C
260 lines
7.6 KiB
C
/*
|
|
* 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.
|
|
*
|
|
* You can also choose to distribute this program under the terms of
|
|
* the Unmodified Binary Distribution Licence (as given in the file
|
|
* COPYING.UBDL), provided that you have satisfied its requirements.
|
|
*/
|
|
|
|
FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
|
|
|
|
#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
|
|
*
|
|
*/
|
|
|
|
/* Disambiguate the various error causes */
|
|
#define EHOSTUNREACH_ROUTE \
|
|
__einfo_error ( EINFO_EHOSTUNREACH_ROUTE )
|
|
#define EINFO_EHOSTUNREACH_ROUTE \
|
|
__einfo_uniqify ( EINFO_EHOSTUNREACH, 0, \
|
|
"No route to destination" )
|
|
#define EHOSTUNREACH_PROHIBITED \
|
|
__einfo_error ( EINFO_EHOSTUNREACH_PROHIBITED )
|
|
#define EINFO_EHOSTUNREACH_PROHIBITED \
|
|
__einfo_uniqify ( EINFO_EHOSTUNREACH, 1, \
|
|
"Communication administratively prohibited" )
|
|
#define EHOSTUNREACH_ADDRESS \
|
|
__einfo_error ( EINFO_EHOSTUNREACH_ADDRESS )
|
|
#define EINFO_EHOSTUNREACH_ADDRESS \
|
|
__einfo_uniqify ( EINFO_EHOSTUNREACH, 3, \
|
|
"Address unreachable" )
|
|
#define EHOSTUNREACH_PORT \
|
|
__einfo_error ( EINFO_EHOSTUNREACH_PORT )
|
|
#define EINFO_EHOSTUNREACH_PORT \
|
|
__einfo_uniqify ( EINFO_EHOSTUNREACH, 4, \
|
|
"Port unreachable" )
|
|
#define EHOSTUNREACH_CODE( code ) \
|
|
EUNIQ ( EINFO_EHOSTUNREACH, ( (code) & 0x1f ), \
|
|
EHOSTUNREACH_ROUTE, EHOSTUNREACH_PROHIBITED, \
|
|
EHOSTUNREACH_ADDRESS, EHOSTUNREACH_PORT )
|
|
|
|
#define ETIMEDOUT_HOP \
|
|
__einfo_error ( EINFO_ETIMEDOUT_HOP )
|
|
#define EINFO_ETIMEDOUT_HOP \
|
|
__einfo_uniqify ( EINFO_ETIMEDOUT, 0, \
|
|
"Hop limit exceeded in transit" )
|
|
#define ETIMEDOUT_REASSEMBLY \
|
|
__einfo_error ( EINFO_ETIMEDOUT_REASSEMBLY )
|
|
#define EINFO_ETIMEDOUT_REASSEMBLY \
|
|
__einfo_uniqify ( EINFO_ETIMEDOUT, 1, \
|
|
"Fragment reassembly time exceeded" )
|
|
#define ETIMEDOUT_CODE( code ) \
|
|
EUNIQ ( EINFO_ETIMEDOUT, ( (code) & 0x1f ), \
|
|
ETIMEDOUT_HOP, ETIMEDOUT_REASSEMBLY )
|
|
|
|
#define EPROTO_BAD_HEADER \
|
|
__einfo_error ( EINFO_EPROTO_BAD_HEADER )
|
|
#define EINFO_EPROTO_BAD_HEADER \
|
|
__einfo_uniqify ( EINFO_EPROTO, 0, \
|
|
"Erroneous header field" )
|
|
#define EPROTO_NEXT_HEADER \
|
|
__einfo_error ( EINFO_EPROTO_NEXT_HEADER )
|
|
#define EINFO_EPROTO_NEXT_HEADER \
|
|
__einfo_uniqify ( EINFO_EPROTO, 1, \
|
|
"Unrecognised next header type" )
|
|
#define EPROTO_OPTION \
|
|
__einfo_error ( EINFO_EPROTO_OPTION )
|
|
#define EINFO_EPROTO_OPTION \
|
|
__einfo_uniqify ( EINFO_EPROTO, 2, \
|
|
"Unrecognised IPv6 option" )
|
|
#define EPROTO_CODE( code ) \
|
|
EUNIQ ( EINFO_EPROTO, ( (code) & 0x1f ), \
|
|
EPROTO_BAD_HEADER, EPROTO_NEXT_HEADER, EPROTO_OPTION )
|
|
|
|
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 ) {
|
|
switch ( icmp->type ) {
|
|
case ICMPV6_DESTINATION_UNREACHABLE:
|
|
rc = -EHOSTUNREACH_CODE ( icmp->code );
|
|
break;
|
|
case ICMPV6_PACKET_TOO_BIG:
|
|
rc = -ERANGE;
|
|
break;
|
|
case ICMPV6_TIME_EXCEEDED:
|
|
rc = -ETIMEDOUT_CODE ( icmp->code );
|
|
break;
|
|
case ICMPV6_PARAMETER_PROBLEM:
|
|
rc = -EPROTO_CODE ( icmp->code );
|
|
break;
|
|
default:
|
|
DBGC ( netdev, "ICMPv6 unrecognised type %d code %d\n",
|
|
icmp->type, icmp->code );
|
|
rc = -ENOTSUP;
|
|
break;
|
|
};
|
|
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,
|
|
};
|