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https://github.com/ipxe/ipxe
synced 2025-12-14 16:01:38 +03:00
e648d23fba
Extend the definition of an IPv4 routing table entry to allow for the expression of non-default gateways for specified off-link subnets, and of on-link secondary subnets (where we can send directly to the destination address even though our source address is not within the subnet). This more precise definition also allows us to correctly handle routing in the (uncommon for iPXE) case when multiple network interfaces are open concurrently and more than one interface has a default gateway. The common case of a single IPv4 address/netmask and a default gateway now results in two routing table entries. To retain backwards compatibility with existing documentation (and to avoid on-screen clutter), the "route" command prints default gateways on the same line as the locally assigned address. There is therefore no change in output from the "route" command unless explicit additional (off-link or on-link) routes are present. Signed-off-by: Michael Brown <mcb30@ipxe.org>
337 lines
10 KiB
C
337 lines
10 KiB
C
/*
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* Copyright (C) 2015 Michael Brown <mbrown@fensystems.co.uk>.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*
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* You can also choose to distribute this program under the terms of
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* the Unmodified Binary Distribution Licence (as given in the file
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* COPYING.UBDL), provided that you have satisfied its requirements.
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*/
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FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
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/** @file
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*
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* IPv4 tests
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*
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*/
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/* Forcibly enable assertions */
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#undef NDEBUG
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#include <stdint.h>
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#include <string.h>
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#include <assert.h>
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#include <byteswap.h>
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#include <ipxe/in.h>
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#include <ipxe/ip.h>
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#include <ipxe/test.h>
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#include "netdev_test.h"
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/** Define inline IPv4 address */
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#define IPV4(a,b,c,d) \
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htonl ( ( (a) << 24 ) | ( (b) << 16 ) | ( (c) << 8 ) | (d) )
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/**
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* Report an inet_ntoa() test result
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*
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* @v addr IPv4 address
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* @v text Expected textual representation
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* @v file Test code file
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* @v line Test code line
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*/
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static void inet_ntoa_okx ( uint32_t addr, const char *text, const char *file,
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unsigned int line ) {
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struct in_addr in = { .s_addr = addr };
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char *actual;
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/* Format address */
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actual = inet_ntoa ( in );
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DBG ( "inet_ntoa ( %d.%d.%d.%d ) = %s\n",
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( ( ntohl ( addr ) >> 24 ) & 0xff ),
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( ( ntohl ( addr ) >> 16 ) & 0xff ),
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( ( ntohl ( addr ) >> 8 ) & 0xff ),
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( ( ntohl ( addr ) >> 0 ) & 0xff ), actual );
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okx ( strcmp ( actual, text ) == 0, file, line );
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}
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#define inet_ntoa_ok( addr, text ) \
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inet_ntoa_okx ( addr, text, __FILE__, __LINE__ )
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/**
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* Report an inet_aton() test result
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*
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* @v text Textual representation
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* @v addr Expected IPv4 address
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* @v file Test code file
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* @v line Test code line
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*/
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static void inet_aton_okx ( const char *text, uint32_t addr, const char *file,
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unsigned int line ) {
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struct in_addr actual;
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/* Parse address */
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okx ( inet_aton ( text, &actual ) != 0, file, line );
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DBG ( "inet_aton ( \"%s\" ) = %s\n", text, inet_ntoa ( actual ) );
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okx ( actual.s_addr == addr, file, line );
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};
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#define inet_aton_ok( text, addr ) \
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inet_aton_okx ( text, addr, __FILE__, __LINE__ )
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/**
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* Report an inet_aton() failure test result
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*
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* @v text Textual representation
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* @v file Test code file
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* @v line Test code line
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*/
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static void inet_aton_fail_okx ( const char *text, const char *file,
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unsigned int line ) {
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struct in_addr actual;
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/* Attempt to parse address */
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okx ( inet_aton ( text, &actual ) == 0, file, line );
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}
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#define inet_aton_fail_ok( text ) \
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inet_aton_fail_okx ( text, __FILE__, __LINE__ )
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/**
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* Report an ipv4_route() test result
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*
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* @v dest Destination address
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* @v scope Destination scope test network device, or NULL
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* @v next Expected next hop address (on success)
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* @v egress Expected egress device, or NULL to expect failure
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* @v src Expected source address (on success)
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* @v bcast Expected broadcast packet (on success)
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* @v file Test code file
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* @v line Test code line
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*/
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static void ipv4_route_okx ( const char *dest, struct testnet *scope,
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const char *next, struct testnet *egress,
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const char *src, int bcast,
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const char *file, unsigned int line ) {
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struct ipv4_miniroute *miniroute;
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struct in_addr in_dest;
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struct in_addr in_src;
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struct in_addr in_next;
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struct in_addr actual;
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unsigned int scope_id;
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/* Sanity checks */
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assert ( ( scope == NULL ) || ( scope->netdev != NULL ) );
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assert ( ( egress == NULL ) == ( src == NULL ) );
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/* Parse addresses */
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okx ( inet_aton ( dest, &in_dest ) != 0, file, line );
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if ( src )
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okx ( inet_aton ( src, &in_src ) != 0, file, line );
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if ( next ) {
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okx ( inet_aton ( next, &in_next ) != 0, file, line );
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} else {
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in_next.s_addr = in_dest.s_addr;
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}
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/* Perform routing */
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actual.s_addr = in_dest.s_addr;
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scope_id = ( scope ? scope->netdev->scope_id : 0 );
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miniroute = ipv4_route ( scope_id, &actual );
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/* Validate result */
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if ( src ) {
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/* Check that a route was found */
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okx ( miniroute != NULL, file, line );
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DBG ( "ipv4_route ( %s, %s ) = %s",
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( scope ? scope->dev.name : "<any>" ), dest,
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inet_ntoa ( actual ) );
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DBG ( " from %s via %s\n",
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inet_ntoa ( miniroute->address ), egress->dev.name );
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/* Check that expected network device was used */
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okx ( miniroute->netdev == egress->netdev, file, line );
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/* Check that expected source address was used */
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okx ( miniroute->address.s_addr == in_src.s_addr, file, line );
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/* Check that expected next hop address was used */
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okx ( actual.s_addr == in_next.s_addr, file, line );
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/* Check that expected broadcast choice was used */
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okx ( ( ! ( ( ~actual.s_addr ) & miniroute->hostmask.s_addr ) )
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== ( !! bcast ), file, line );
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} else {
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/* Routing is expected to fail */
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okx ( miniroute == NULL, file, line );
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DBG ( "ipv4_route ( %s, %s ) = <unreachable>\n",
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( scope ? scope->dev.name : "<any>" ), dest );
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}
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}
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#define ipv4_route_ok( dest, scope, next, egress, src, bcast ) \
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ipv4_route_okx ( dest, scope, next, egress, src, bcast, \
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__FILE__, __LINE__ )
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/** net0: Single address and gateway (DHCP assignment) */
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TESTNET ( net0,
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{ "dhcp/ip", "192.168.0.1" },
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{ "dhcp/netmask", "255.255.255.0" },
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{ "dhcp/gateway", "192.168.0.254" } );
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/** net1: Single address and gateway (DHCP assignment) */
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TESTNET ( net1,
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{ "dhcp/ip", "192.168.0.2" },
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{ "dhcp/netmask", "255.255.255.0" },
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{ "dhcp/gateway", "192.168.0.254" } );
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/** net2: Small /31 subnet mask */
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TESTNET ( net2,
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{ "ip", "10.31.31.0" },
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{ "netmask", "255.255.255.254" },
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{ "gateway", "10.31.31.1" } );
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/** net3: Small /32 subnet mask */
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TESTNET ( net3,
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{ "ip", "10.32.32.32" },
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{ "netmask", "255.255.255.255" },
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{ "gateway", "192.168.32.254" } );
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/** net4: Local subnet with no gateway */
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TESTNET ( net4,
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{ "ip", "192.168.86.1" },
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{ "netmask", "255.255.240.0" } );
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/**
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* Perform IPv4 self-tests
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*
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*/
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static void ipv4_test_exec ( void ) {
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/* Address testing macros */
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ok ( IN_IS_CLASSA ( IPV4 ( 10, 0, 0, 1 ) ) );
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ok ( ! IN_IS_CLASSB ( IPV4 ( 10, 0, 0, 1 ) ) );
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ok ( ! IN_IS_CLASSC ( IPV4 ( 10, 0, 0, 1 ) ) );
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ok ( ! IN_IS_CLASSA ( IPV4 ( 172, 16, 0, 1 ) ) );
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ok ( IN_IS_CLASSB ( IPV4 ( 172, 16, 0, 1 ) ) );
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ok ( ! IN_IS_CLASSC ( IPV4 ( 172, 16, 0, 1 ) ) );
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ok ( ! IN_IS_CLASSA ( IPV4 ( 192, 168, 0, 1 ) ) );
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ok ( ! IN_IS_CLASSB ( IPV4 ( 192, 168, 0, 1 ) ) );
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ok ( IN_IS_CLASSC ( IPV4 ( 192, 168, 0, 1 ) ) );
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ok ( ! IN_IS_MULTICAST ( IPV4 ( 127, 0, 0, 1 ) ) );
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ok ( ! IN_IS_MULTICAST ( IPV4 ( 8, 8, 8, 8 ) ) );
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ok ( ! IN_IS_MULTICAST ( IPV4 ( 0, 0, 0, 0 ) ) );
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ok ( ! IN_IS_MULTICAST ( IPV4 ( 223, 0, 0, 1 ) ) );
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ok ( ! IN_IS_MULTICAST ( IPV4 ( 240, 0, 0, 1 ) ) );
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ok ( IN_IS_MULTICAST ( IPV4 ( 224, 0, 0, 1 ) ) );
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ok ( IN_IS_MULTICAST ( IPV4 ( 231, 89, 0, 2 ) ) );
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ok ( IN_IS_MULTICAST ( IPV4 ( 239, 6, 1, 17 ) ) );
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/* inet_ntoa() tests */
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inet_ntoa_ok ( IPV4 ( 127, 0, 0, 1 ), "127.0.0.1" );
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inet_ntoa_ok ( IPV4 ( 0, 0, 0, 0 ), "0.0.0.0" );
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inet_ntoa_ok ( IPV4 ( 255, 255, 255, 255 ), "255.255.255.255" );
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inet_ntoa_ok ( IPV4 ( 212, 13, 204, 60 ), "212.13.204.60" );
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/* inet_aton() tests */
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inet_aton_ok ( "212.13.204.60", IPV4 ( 212, 13, 204, 60 ) );
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inet_aton_ok ( "127.0.0.1", IPV4 ( 127, 0, 0, 1 ) );
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/* inet_aton() failure tests */
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inet_aton_fail_ok ( "256.0.0.1" ); /* Byte out of range */
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inet_aton_fail_ok ( "212.13.204.60.1" ); /* Too long */
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inet_aton_fail_ok ( "127.0.0" ); /* Too short */
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inet_aton_fail_ok ( "1.2.3.a" ); /* Invalid characters */
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inet_aton_fail_ok ( "127.0..1" ); /* Missing bytes */
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/* Single address and gateway */
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testnet_ok ( &net0 );
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ipv4_route_ok ( "192.168.0.10", NULL,
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"192.168.0.10", &net0, "192.168.0.1", 0 );
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ipv4_route_ok ( "10.0.0.6", NULL,
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"192.168.0.254", &net0, "192.168.0.1", 0 );
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ipv4_route_ok ( "192.168.0.255", NULL,
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"192.168.0.255", &net0, "192.168.0.1", 1 );
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testnet_remove_ok ( &net0 );
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/* Overridden DHCP-assigned address */
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testnet_ok ( &net1 );
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ipv4_route_ok ( "192.168.1.3", NULL,
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"192.168.0.254", &net1, "192.168.0.2", 0 );
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testnet_set_ok ( &net1, "ip", "192.168.1.2" );
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ipv4_route_ok ( "192.168.1.3", NULL,
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"192.168.1.3", &net1, "192.168.1.2", 0 );
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testnet_remove_ok ( &net1 );
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/* Small /31 subnet */
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testnet_ok ( &net2 );
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ipv4_route_ok ( "10.31.31.1", NULL,
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"10.31.31.1", &net2, "10.31.31.0", 0 );
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ipv4_route_ok ( "212.13.204.60", NULL,
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"10.31.31.1", &net2, "10.31.31.0", 0 );
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testnet_remove_ok ( &net2 );
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/* Small /32 subnet */
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testnet_ok ( &net3 );
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ipv4_route_ok ( "10.32.32.31", NULL,
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"192.168.32.254", &net3, "10.32.32.32", 0 );
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ipv4_route_ok ( "8.8.8.8", NULL,
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"192.168.32.254", &net3, "10.32.32.32", 0 );
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testnet_remove_ok ( &net3 );
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/* No gateway */
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testnet_ok ( &net4 );
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ipv4_route_ok ( "192.168.87.1", NULL,
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"192.168.87.1", &net4, "192.168.86.1", 0 );
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ipv4_route_ok ( "192.168.96.1", NULL, NULL, NULL, NULL, 0 );
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testnet_remove_ok ( &net4 );
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/* Multiple interfaces */
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testnet_ok ( &net0 );
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testnet_ok ( &net1 );
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testnet_ok ( &net2 );
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testnet_close_ok ( &net1 );
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ipv4_route_ok ( "192.168.0.9", NULL,
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"192.168.0.9", &net0, "192.168.0.1", 0 );
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ipv4_route_ok ( "10.31.31.1", NULL,
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"10.31.31.1", &net2, "10.31.31.0", 0 );
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testnet_close_ok ( &net0 );
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testnet_open_ok ( &net1 );
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ipv4_route_ok ( "192.168.0.9", NULL,
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"192.168.0.9", &net1, "192.168.0.2", 0 );
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ipv4_route_ok ( "10.31.31.1", NULL,
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"10.31.31.1", &net2, "10.31.31.0", 0 );
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testnet_close_ok ( &net2 );
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ipv4_route_ok ( "8.8.8.8", NULL,
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"192.168.0.254", &net1, "192.168.0.2", 0 );
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testnet_close_ok ( &net1 );
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testnet_open_ok ( &net0 );
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ipv4_route_ok ( "8.8.8.8", NULL,
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"192.168.0.254", &net0, "192.168.0.1", 0 );
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testnet_close_ok ( &net0 );
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testnet_open_ok ( &net2 );
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ipv4_route_ok ( "8.8.8.8", NULL,
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"10.31.31.1", &net2, "10.31.31.0", 0 );
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testnet_remove_ok ( &net2 );
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testnet_remove_ok ( &net1 );
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testnet_remove_ok ( &net0 );
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}
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/** IPv4 self-test */
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struct self_test ipv4_test __self_test = {
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.name = "ipv4",
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.exec = ipv4_test_exec,
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};
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