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[dhcpv6] Add basic support for stateful and stateless DHCPv6

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Add support for the stateful and stateless variants of the DHCPv6
protocol.  The resulting settings block is registered as
"net<x>.dhcpv6", and DHCPv6 options can be obtained using
e.g. "${net0.dhcpv6/23:ipv6}" to obtain the IPv6 DNS server address.

IPv6 addresses obtained via stateful DHCPv6 are not yet applied to the
network device.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2013-11-08 14:35:29 +00:00
parent c1570d3dfb
commit 2fa34085e2
4 changed files with 1207 additions and 5 deletions
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41
src/net/ndp.c
View File

@@ -29,6 +29,7 @@ FILE_LICENCE ( GPL2_OR_LATER );
#include <ipxe/ipv6.h>
#include <ipxe/icmpv6.h>
#include <ipxe/neighbour.h>
#include <ipxe/dhcpv6.h>
#include <ipxe/ndp.h>
/** @file
@@ -596,6 +597,8 @@ struct ipv6conf {
/** Job control interface */
struct interface job;
/** DHCPv6 interface */
struct interface dhcp;
/** Network device being configured */
struct net_device *netdev;
@@ -646,6 +649,7 @@ static void ipv6conf_done ( struct ipv6conf *ipv6conf, int rc ) {
/* Shut down interfaces */
intf_shutdown ( &ipv6conf->job, rc );
intf_shutdown ( &ipv6conf->dhcp, rc );
/* Stop timer */
stop_timer ( &ipv6conf->timer );
@@ -686,6 +690,8 @@ static void ipv6conf_expired ( struct retry_timer *timer, int fail ) {
static int ipv6conf_rx_router_advertisement ( struct net_device *netdev,
unsigned int flags ) {
struct ipv6conf *ipv6conf;
int stateful;
int rc;
/* Identify IPv6 configurator, if any */
ipv6conf = ipv6conf_demux ( netdev );
@@ -697,13 +703,28 @@ static int ipv6conf_rx_router_advertisement ( struct net_device *netdev,
return 0;
}
/* Fail if stateful address autoconfiguration is required */
if ( flags & NDP_ROUTER_MANAGED ) {
ipv6conf_done ( ipv6conf, -ENOTSUP );
return -ENOTSUP;
/* If this is not the first solicited router advertisement, ignore it */
if ( ! timer_running ( &ipv6conf->timer ) )
return 0;
/* Stop router solicitation timer */
stop_timer ( &ipv6conf->timer );
/* Start DHCPv6 if required */
if ( flags & ( NDP_ROUTER_MANAGED | NDP_ROUTER_OTHER ) ) {
stateful = ( flags & NDP_ROUTER_MANAGED );
if ( ( rc = start_dhcpv6 ( &ipv6conf->dhcp, netdev,
stateful ) ) != 0 ) {
DBGC ( netdev, "NDP could not start state%s DHCPv6: "
"%s\n", ( stateful ? "ful" : "less" ),
strerror ( rc ) );
ipv6conf_done ( ipv6conf, rc );
return rc;
}
return 0;
}
/* Mark autoconfiguration as complete */
/* Otherwise, terminate autoconfiguration */
ipv6conf_done ( ipv6conf, 0 );
return 0;
@@ -718,6 +739,15 @@ static struct interface_operation ipv6conf_job_op[] = {
static struct interface_descriptor ipv6conf_job_desc =
INTF_DESC ( struct ipv6conf, job, ipv6conf_job_op );
/** IPv6 configurator DHCPv6 interface operations */
static struct interface_operation ipv6conf_dhcp_op[] = {
INTF_OP ( intf_close, struct ipv6conf *, ipv6conf_done ),
};
/** IPv6 configurator DHCPv6 interface descriptor */
static struct interface_descriptor ipv6conf_dhcp_desc =
INTF_DESC ( struct ipv6conf, dhcp, ipv6conf_dhcp_op );
/**
* Start IPv6 autoconfiguration
*
@@ -734,6 +764,7 @@ int start_ipv6conf ( struct interface *job, struct net_device *netdev ) {
return -ENOMEM;
ref_init ( &ipv6conf->refcnt, ipv6conf_free );
intf_init ( &ipv6conf->job, &ipv6conf_job_desc, &ipv6conf->refcnt );
intf_init ( &ipv6conf->dhcp, &ipv6conf_dhcp_desc, &ipv6conf->refcnt );
timer_init ( &ipv6conf->timer, ipv6conf_expired, &ipv6conf->refcnt );
ipv6conf->netdev = netdev_get ( netdev );