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upgrade to lwip 2.0.0, beginning support for IPV6

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This commit is contained in:
Joseph Henry
2016-09-11 17:27:44 -07:00
parent 83361f35fe
commit fb1564562b
389 changed files with 122993 additions and 14346 deletions
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349
ext/lwip/src/core/ipv4/autoip.c
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@@ -2,6 +2,28 @@
* @file
* AutoIP Automatic LinkLocal IP Configuration
*
* This is a AutoIP implementation for the lwIP TCP/IP stack. It aims to conform
* with RFC 3927.
*
* @defgroup autoip AUTOIP
* @ingroup ip4
* AUTOIP related functions
* USAGE:
*
* define @ref LWIP_AUTOIP 1 in your lwipopts.h
* Options:
* AUTOIP_TMR_INTERVAL msecs,
* I recommend a value of 100. The value must divide 1000 with a remainder almost 0.
* Possible values are 1000, 500, 333, 250, 200, 166, 142, 125, 111, 100 ....
*
* Without DHCP:
* - Call autoip_start() after netif_add().
*
* With DHCP:
* - define @ref LWIP_DHCP_AUTOIP_COOP 1 in your lwipopts.h.
* - Configure your DHCP Client.
*
* @see netifapi_autoip
*/
/*
@@ -32,58 +54,23 @@
* OF SUCH DAMAGE.
*
* Author: Dominik Spies <kontakt@dspies.de>
*
* This is a AutoIP implementation for the lwIP TCP/IP stack. It aims to conform
* with RFC 3927.
*
*
* Please coordinate changes and requests with Dominik Spies
* <kontakt@dspies.de>
*/
/*******************************************************************************
* USAGE:
*
* define LWIP_AUTOIP 1 in your lwipopts.h
*
* If you don't use tcpip.c (so, don't call, you don't call tcpip_init):
* - First, call autoip_init().
* - call autoip_tmr() all AUTOIP_TMR_INTERVAL msces,
* that should be defined in autoip.h.
* I recommend a value of 100. The value must divide 1000 with a remainder almost 0.
* Possible values are 1000, 500, 333, 250, 200, 166, 142, 125, 111, 100 ....
*
* Without DHCP:
* - Call autoip_start() after netif_add().
*
* With DHCP:
* - define LWIP_DHCP_AUTOIP_COOP 1 in your lwipopts.h.
* - Configure your DHCP Client.
*
*/
#include "lwip/opt.h"
#if LWIP_AUTOIP /* don't build if not configured for use in lwipopts.h */
#if LWIP_IPV4 && LWIP_AUTOIP /* don't build if not configured for use in lwipopts.h */
#include "lwip/mem.h"
#include "lwip/udp.h"
/* #include "lwip/udp.h" */
#include "lwip/ip_addr.h"
#include "lwip/netif.h"
#include "lwip/autoip.h"
#include "netif/etharp.h"
#include "lwip/etharp.h"
#include "lwip/prot/autoip.h"
#include <stdlib.h>
#include <string.h>
/* 169.254.0.0 */
#define AUTOIP_NET 0xA9FE0000
/* 169.254.1.0 */
#define AUTOIP_RANGE_START (AUTOIP_NET | 0x0100)
/* 169.254.254.255 */
#define AUTOIP_RANGE_END (AUTOIP_NET | 0xFEFF)
/** Pseudo random macro based on netif informations.
* You could use "rand()" from the C Library if you define LWIP_AUTOIP_RAND in lwipopts.h */
#ifndef LWIP_AUTOIP_RAND
@@ -91,7 +78,7 @@
((u32_t)((netif->hwaddr[3]) & 0xff) << 16) | \
((u32_t)((netif->hwaddr[2]) & 0xff) << 8) | \
((u32_t)((netif->hwaddr[4]) & 0xff))) + \
(netif->autoip?netif->autoip->tried_llipaddr:0))
(netif_autoip_data(netif)? netif_autoip_data(netif)->tried_llipaddr : 0))
#endif /* LWIP_AUTOIP_RAND */
/**
@@ -105,41 +92,31 @@
#endif /* LWIP_AUTOIP_CREATE_SEED_ADDR */
/* static functions */
static void autoip_handle_arp_conflict(struct netif *netif);
/* creates a pseudo random LL IP-Address for a network interface */
static void autoip_create_addr(struct netif *netif, ip_addr_t *ipaddr);
/* sends an ARP probe */
static err_t autoip_arp_probe(struct netif *netif);
/* sends an ARP announce */
static err_t autoip_arp_announce(struct netif *netif);
/* configure interface for use with current LL IP-Address */
static err_t autoip_bind(struct netif *netif);
/* start sending probes for llipaddr */
static void autoip_start_probing(struct netif *netif);
#define netif_autoip_data(netif) ((struct autoip*)netif_get_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_AUTOIP))
/** Set a statically allocated struct autoip to work with.
/**
* @ingroup autoip
* Set a statically allocated struct autoip to work with.
* Using this prevents autoip_start to allocate it using mem_malloc.
*
* @param netif the netif for which to set the struct autoip
* @param dhcp (uninitialised) dhcp struct allocated by the application
* @param autoip (uninitialised) autoip struct allocated by the application
*/
void
autoip_set_struct(struct netif *netif, struct autoip *autoip)
{
LWIP_ASSERT("netif != NULL", netif != NULL);
LWIP_ASSERT("autoip != NULL", autoip != NULL);
LWIP_ASSERT("netif already has a struct autoip set", netif->autoip == NULL);
LWIP_ASSERT("netif already has a struct autoip set",
netif_autoip_data(netif) == NULL);
/* clear data structure */
memset(autoip, 0, sizeof(struct autoip));
/* autoip->state = AUTOIP_STATE_OFF; */
netif->autoip = autoip;
netif_set_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_AUTOIP, autoip);
}
/** Restart AutoIP client and check the next address (conflict detected)
@@ -149,7 +126,8 @@ autoip_set_struct(struct netif *netif, struct autoip *autoip)
static void
autoip_restart(struct netif *netif)
{
netif->autoip->tried_llipaddr++;
struct autoip* autoip = netif_autoip_data(netif);
autoip->tried_llipaddr++;
autoip_start(netif);
}
@@ -159,30 +137,27 @@ autoip_restart(struct netif *netif)
static void
autoip_handle_arp_conflict(struct netif *netif)
{
/* Somehow detect if we are defending or retreating */
unsigned char defend = 1; /* tbd */
struct autoip* autoip = netif_autoip_data(netif);
if (defend) {
if (netif->autoip->lastconflict > 0) {
/* retreat, there was a conflicting ARP in the last
* DEFEND_INTERVAL seconds
*/
LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE,
("autoip_handle_arp_conflict(): we are defending, but in DEFEND_INTERVAL, retreating\n"));
/* RFC3927, 2.5 "Conflict Detection and Defense" allows two options where
a) means retreat on the first conflict and
b) allows to keep an already configured address when having only one
conflict in 10 seconds
We use option b) since it helps to improve the chance that one of the two
conflicting hosts may be able to retain its address. */
/* TODO: close all TCP sessions */
autoip_restart(netif);
} else {
LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE,
("autoip_handle_arp_conflict(): we are defend, send ARP Announce\n"));
autoip_arp_announce(netif);
netif->autoip->lastconflict = DEFEND_INTERVAL * AUTOIP_TICKS_PER_SECOND;
}
if (autoip->lastconflict > 0) {
/* retreat, there was a conflicting ARP in the last DEFEND_INTERVAL seconds */
LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE,
("autoip_handle_arp_conflict(): we are defending, but in DEFEND_INTERVAL, retreating\n"));
/* Active TCP sessions are aborted when removing the ip addresss */
autoip_restart(netif);
} else {
LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE,
("autoip_handle_arp_conflict(): we do not defend, retreating\n"));
/* TODO: close all TCP sessions */
autoip_restart(netif);
("autoip_handle_arp_conflict(): we are defend, send ARP Announce\n"));
autoip_arp_announce(netif);
autoip->lastconflict = DEFEND_INTERVAL * AUTOIP_TICKS_PER_SECOND;
}
}
@@ -193,16 +168,18 @@ autoip_handle_arp_conflict(struct netif *netif)
* @param ipaddr ip address to initialize
*/
static void
autoip_create_addr(struct netif *netif, ip_addr_t *ipaddr)
autoip_create_addr(struct netif *netif, ip4_addr_t *ipaddr)
{
struct autoip* autoip = netif_autoip_data(netif);
/* Here we create an IP-Address out of range 169.254.1.0 to 169.254.254.255
* compliant to RFC 3927 Section 2.1
* We have 254 * 256 possibilities */
u32_t addr = ntohl(LWIP_AUTOIP_CREATE_SEED_ADDR(netif));
addr += netif->autoip->tried_llipaddr;
addr += autoip->tried_llipaddr;
addr = AUTOIP_NET | (addr & 0xffff);
/* Now, 169.254.0.0 <= addr <= 169.254.255.255 */
/* Now, 169.254.0.0 <= addr <= 169.254.255.255 */
if (addr < AUTOIP_RANGE_START) {
addr += AUTOIP_RANGE_END - AUTOIP_RANGE_START + 1;
@@ -213,10 +190,10 @@ autoip_create_addr(struct netif *netif, ip_addr_t *ipaddr)
LWIP_ASSERT("AUTOIP address not in range", (addr >= AUTOIP_RANGE_START) &&
(addr <= AUTOIP_RANGE_END));
ip4_addr_set_u32(ipaddr, htonl(addr));
LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE,
("autoip_create_addr(): tried_llipaddr=%"U16_F", %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
(u16_t)(netif->autoip->tried_llipaddr), ip4_addr1_16(ipaddr), ip4_addr2_16(ipaddr),
(u16_t)(autoip->tried_llipaddr), ip4_addr1_16(ipaddr), ip4_addr2_16(ipaddr),
ip4_addr3_16(ipaddr), ip4_addr4_16(ipaddr)));
}
@@ -228,9 +205,9 @@ autoip_create_addr(struct netif *netif, ip_addr_t *ipaddr)
static err_t
autoip_arp_probe(struct netif *netif)
{
return etharp_raw(netif, (struct eth_addr *)netif->hwaddr, &ethbroadcast,
(struct eth_addr *)netif->hwaddr, IP_ADDR_ANY, &ethzero,
&netif->autoip->llipaddr, ARP_REQUEST);
struct autoip* autoip = netif_autoip_data(netif);
/* this works because netif->ip_addr is ANY */
return etharp_request(netif, &autoip->llipaddr);
}
/**
@@ -241,9 +218,7 @@ autoip_arp_probe(struct netif *netif)
static err_t
autoip_arp_announce(struct netif *netif)
{
return etharp_raw(netif, (struct eth_addr *)netif->hwaddr, &ethbroadcast,
(struct eth_addr *)netif->hwaddr, &netif->autoip->llipaddr, &ethzero,
&netif->autoip->llipaddr, ARP_REQUEST);
return etharp_gratuitous(netif);
}
/**
@@ -254,8 +229,8 @@ autoip_arp_announce(struct netif *netif)
static err_t
autoip_bind(struct netif *netif)
{
struct autoip *autoip = netif->autoip;
ip_addr_t sn_mask, gw_addr;
struct autoip* autoip = netif_autoip_data(netif);
ip4_addr_t sn_mask, gw_addr;
LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE,
("autoip_bind(netif=%p) %c%c%"U16_F" %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
@@ -266,17 +241,14 @@ autoip_bind(struct netif *netif)
IP4_ADDR(&sn_mask, 255, 255, 0, 0);
IP4_ADDR(&gw_addr, 0, 0, 0, 0);
netif_set_ipaddr(netif, &autoip->llipaddr);
netif_set_netmask(netif, &sn_mask);
netif_set_gw(netif, &gw_addr);
/* bring the interface up */
netif_set_up(netif);
netif_set_addr(netif, &autoip->llipaddr, &sn_mask, &gw_addr);
/* interface is used by routing now that an address is set */
return ERR_OK;
}
/**
* @ingroup autoip
* Start AutoIP client
*
* @param netif network interface on which start the AutoIP client
@@ -284,19 +256,15 @@ autoip_bind(struct netif *netif)
err_t
autoip_start(struct netif *netif)
{
struct autoip *autoip = netif->autoip;
struct autoip* autoip = netif_autoip_data(netif);
err_t result = ERR_OK;
if (netif_is_up(netif)) {
netif_set_down(netif);
}
LWIP_ERROR("netif is not up, old style port?", netif_is_up(netif), return ERR_ARG;);
/* Set IP-Address, Netmask and Gateway to 0 to make sure that
* ARP Packets are formed correctly
*/
ip_addr_set_zero(&netif->ip_addr);
ip_addr_set_zero(&netif->netmask);
ip_addr_set_zero(&netif->gw);
netif_set_addr(netif, IP4_ADDR_ANY, IP4_ADDR_ANY, IP4_ADDR_ANY);
LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE,
("autoip_start(netif=%p) %c%c%"U16_F"\n", (void*)netif, netif->name[0],
@@ -313,13 +281,13 @@ autoip_start(struct netif *netif)
}
memset(autoip, 0, sizeof(struct autoip));
/* store this AutoIP client in the netif */
netif->autoip = autoip;
netif_set_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_AUTOIP, autoip);
LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE, ("autoip_start(): allocated autoip"));
} else {
autoip->state = AUTOIP_STATE_OFF;
autoip->ttw = 0;
autoip->sent_num = 0;
ip_addr_set_zero(&autoip->llipaddr);
ip4_addr_set_zero(&autoip->llipaddr);
autoip->lastconflict = 0;
}
@@ -332,24 +300,24 @@ autoip_start(struct netif *netif)
static void
autoip_start_probing(struct netif *netif)
{
struct autoip *autoip = netif->autoip;
struct autoip* autoip = netif_autoip_data(netif);
autoip->state = AUTOIP_STATE_PROBING;
autoip->sent_num = 0;
LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE,
("autoip_start_probing(): changing state to PROBING: %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
ip4_addr1_16(&netif->autoip->llipaddr), ip4_addr2_16(&netif->autoip->llipaddr),
ip4_addr3_16(&netif->autoip->llipaddr), ip4_addr4_16(&netif->autoip->llipaddr)));
ip4_addr1_16(&autoip->llipaddr), ip4_addr2_16(&autoip->llipaddr),
ip4_addr3_16(&autoip->llipaddr), ip4_addr4_16(&autoip->llipaddr)));
/* time to wait to first probe, this is randomly
* choosen out of 0 to PROBE_WAIT seconds.
* chosen out of 0 to PROBE_WAIT seconds.
* compliant to RFC 3927 Section 2.2.1
*/
autoip->ttw = (u16_t)(LWIP_AUTOIP_RAND(netif) % (PROBE_WAIT * AUTOIP_TICKS_PER_SECOND));
/*
* if we tried more then MAX_CONFLICTS we must limit our rate for
* accquiring and probing address
* acquiring and probing address
* compliant to RFC 3927 Section 2.2.1
*/
if (autoip->tried_llipaddr > MAX_CONFLICTS) {
@@ -366,13 +334,15 @@ autoip_start_probing(struct netif *netif)
void
autoip_network_changed(struct netif *netif)
{
if (netif->autoip && netif->autoip->state != AUTOIP_STATE_OFF) {
netif_set_down(netif);
struct autoip* autoip = netif_autoip_data(netif);
if (autoip && (autoip->state != AUTOIP_STATE_OFF)) {
autoip_start_probing(netif);
}
}
/**
* @ingroup autoip
* Stop AutoIP client
*
* @param netif network interface on which stop the AutoIP client
@@ -380,8 +350,14 @@ autoip_network_changed(struct netif *netif)
err_t
autoip_stop(struct netif *netif)
{
netif->autoip->state = AUTOIP_STATE_OFF;
netif_set_down(netif);
struct autoip* autoip = netif_autoip_data(netif);
if (autoip != NULL) {
autoip->state = AUTOIP_STATE_OFF;
if (ip4_addr_islinklocal(netif_ip4_addr(netif))) {
netif_set_addr(netif, IP4_ADDR_ANY, IP4_ADDR_ANY, IP4_ADDR_ANY);
}
}
return ERR_OK;
}
@@ -389,78 +365,80 @@ autoip_stop(struct netif *netif)
* Has to be called in loop every AUTOIP_TMR_INTERVAL milliseconds
*/
void
autoip_tmr()
autoip_tmr(void)
{
struct netif *netif = netif_list;
/* loop through netif's */
while (netif != NULL) {
struct autoip* autoip = netif_autoip_data(netif);
/* only act on AutoIP configured interfaces */
if (netif->autoip != NULL) {
if (netif->autoip->lastconflict > 0) {
netif->autoip->lastconflict--;
if (autoip != NULL) {
if (autoip->lastconflict > 0) {
autoip->lastconflict--;
}
LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE,
("autoip_tmr() AutoIP-State: %"U16_F", ttw=%"U16_F"\n",
(u16_t)(netif->autoip->state), netif->autoip->ttw));
(u16_t)(autoip->state), autoip->ttw));
switch(netif->autoip->state) {
if (autoip->ttw > 0) {
autoip->ttw--;
}
switch(autoip->state) {
case AUTOIP_STATE_PROBING:
if (netif->autoip->ttw > 0) {
netif->autoip->ttw--;
} else {
if (netif->autoip->sent_num >= PROBE_NUM) {
netif->autoip->state = AUTOIP_STATE_ANNOUNCING;
netif->autoip->sent_num = 0;
netif->autoip->ttw = ANNOUNCE_WAIT * AUTOIP_TICKS_PER_SECOND;
if (autoip->ttw == 0) {
if (autoip->sent_num >= PROBE_NUM) {
/* Switch to ANNOUNCING: now we can bind to an IP address and use it */
autoip->state = AUTOIP_STATE_ANNOUNCING;
autoip_bind(netif);
/* autoip_bind() calls netif_set_addr(): this triggers a gratuitous ARP
which counts as an announcement */
autoip->sent_num = 1;
autoip->ttw = ANNOUNCE_WAIT * AUTOIP_TICKS_PER_SECOND;
LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE,
("autoip_tmr(): changing state to ANNOUNCING: %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
ip4_addr1_16(&netif->autoip->llipaddr), ip4_addr2_16(&netif->autoip->llipaddr),
ip4_addr3_16(&netif->autoip->llipaddr), ip4_addr4_16(&netif->autoip->llipaddr)));
ip4_addr1_16(&autoip->llipaddr), ip4_addr2_16(&autoip->llipaddr),
ip4_addr3_16(&autoip->llipaddr), ip4_addr4_16(&autoip->llipaddr)));
} else {
autoip_arp_probe(netif);
LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE,
("autoip_tmr() PROBING Sent Probe\n"));
netif->autoip->sent_num++;
/* calculate time to wait to next probe */
netif->autoip->ttw = (u16_t)((LWIP_AUTOIP_RAND(netif) %
((PROBE_MAX - PROBE_MIN) * AUTOIP_TICKS_PER_SECOND) ) +
PROBE_MIN * AUTOIP_TICKS_PER_SECOND);
LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE, ("autoip_tmr() PROBING Sent Probe\n"));
autoip->sent_num++;
if (autoip->sent_num == PROBE_NUM) {
/* calculate time to wait to for announce */
autoip->ttw = ANNOUNCE_WAIT * AUTOIP_TICKS_PER_SECOND;
} else {
/* calculate time to wait to next probe */
autoip->ttw = (u16_t)((LWIP_AUTOIP_RAND(netif) %
((PROBE_MAX - PROBE_MIN) * AUTOIP_TICKS_PER_SECOND) ) +
PROBE_MIN * AUTOIP_TICKS_PER_SECOND);
}
}
}
break;
case AUTOIP_STATE_ANNOUNCING:
if (netif->autoip->ttw > 0) {
netif->autoip->ttw--;
} else {
if (netif->autoip->sent_num == 0) {
/* We are here the first time, so we waited ANNOUNCE_WAIT seconds
* Now we can bind to an IP address and use it.
*
* autoip_bind calls netif_set_up. This triggers a gratuitous ARP
* which counts as an announcement.
*/
autoip_bind(netif);
} else {
autoip_arp_announce(netif);
LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE,
("autoip_tmr() ANNOUNCING Sent Announce\n"));
}
netif->autoip->ttw = ANNOUNCE_INTERVAL * AUTOIP_TICKS_PER_SECOND;
netif->autoip->sent_num++;
if (autoip->ttw == 0) {
autoip_arp_announce(netif);
LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE, ("autoip_tmr() ANNOUNCING Sent Announce\n"));
autoip->ttw = ANNOUNCE_INTERVAL * AUTOIP_TICKS_PER_SECOND;
autoip->sent_num++;
if (netif->autoip->sent_num >= ANNOUNCE_NUM) {
netif->autoip->state = AUTOIP_STATE_BOUND;
netif->autoip->sent_num = 0;
netif->autoip->ttw = 0;
if (autoip->sent_num >= ANNOUNCE_NUM) {
autoip->state = AUTOIP_STATE_BOUND;
autoip->sent_num = 0;
autoip->ttw = 0;
LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE,
("autoip_tmr(): changing state to BOUND: %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
ip4_addr1_16(&netif->autoip->llipaddr), ip4_addr2_16(&netif->autoip->llipaddr),
ip4_addr3_16(&netif->autoip->llipaddr), ip4_addr4_16(&netif->autoip->llipaddr)));
ip4_addr1_16(&autoip->llipaddr), ip4_addr2_16(&autoip->llipaddr),
ip4_addr3_16(&autoip->llipaddr), ip4_addr4_16(&autoip->llipaddr)));
}
}
break;
default:
/* nothing to do in other states */
break;
}
}
/* proceed to next network interface */
@@ -469,7 +447,7 @@ autoip_tmr()
}
/**
* Handles every incoming ARP Packet, called by etharp_arp_input.
* Handles every incoming ARP Packet, called by etharp_input().
*
* @param netif network interface to use for autoip processing
* @param hdr Incoming ARP packet
@@ -477,34 +455,34 @@ autoip_tmr()
void
autoip_arp_reply(struct netif *netif, struct etharp_hdr *hdr)
{
struct autoip* autoip = netif_autoip_data(netif);
LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE, ("autoip_arp_reply()\n"));
if ((netif->autoip != NULL) && (netif->autoip->state != AUTOIP_STATE_OFF)) {
if ((autoip != NULL) && (autoip->state != AUTOIP_STATE_OFF)) {
/* when ip.src == llipaddr && hw.src != netif->hwaddr
*
* when probing ip.dst == llipaddr && hw.src != netif->hwaddr
* we have a conflict and must solve it
*/
ip_addr_t sipaddr, dipaddr;
ip4_addr_t sipaddr, dipaddr;
struct eth_addr netifaddr;
ETHADDR16_COPY(netifaddr.addr, netif->hwaddr);
/* Copy struct ip_addr2 to aligned ip_addr, to support compilers without
/* Copy struct ip4_addr2 to aligned ip4_addr, to support compilers without
* structure packing (not using structure copy which breaks strict-aliasing rules).
*/
IPADDR2_COPY(&sipaddr, &hdr->sipaddr);
IPADDR2_COPY(&dipaddr, &hdr->dipaddr);
if ((netif->autoip->state == AUTOIP_STATE_PROBING) ||
((netif->autoip->state == AUTOIP_STATE_ANNOUNCING) &&
(netif->autoip->sent_num == 0))) {
if (autoip->state == AUTOIP_STATE_PROBING) {
/* RFC 3927 Section 2.2.1:
* from beginning to after ANNOUNCE_WAIT
* seconds we have a conflict if
* ip.src == llipaddr OR
* ip.dst == llipaddr && hw.src != own hwaddr
*/
if ((ip_addr_cmp(&sipaddr, &netif->autoip->llipaddr)) ||
(ip_addr_cmp(&dipaddr, &netif->autoip->llipaddr) &&
if ((ip4_addr_cmp(&sipaddr, &autoip->llipaddr)) ||
(ip4_addr_cmp(&dipaddr, &autoip->llipaddr) &&
!eth_addr_cmp(&netifaddr, &hdr->shwaddr))) {
LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE | LWIP_DBG_LEVEL_WARNING,
("autoip_arp_reply(): Probe Conflict detected\n"));
@@ -515,7 +493,7 @@ autoip_arp_reply(struct netif *netif, struct etharp_hdr *hdr)
* in any state we have a conflict if
* ip.src == llipaddr && hw.src != own hwaddr
*/
if (ip_addr_cmp(&sipaddr, &netif->autoip->llipaddr) &&
if (ip4_addr_cmp(&sipaddr, &autoip->llipaddr) &&
!eth_addr_cmp(&netifaddr, &hdr->shwaddr)) {
LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE | LWIP_DBG_LEVEL_WARNING,
("autoip_arp_reply(): Conflicting ARP-Packet detected\n"));
@@ -525,4 +503,27 @@ autoip_arp_reply(struct netif *netif, struct etharp_hdr *hdr)
}
}
#endif /* LWIP_AUTOIP */
/** check if AutoIP supplied netif->ip_addr
*
* @param netif the netif to check
* @return 1 if AutoIP supplied netif->ip_addr (state BOUND or ANNOUNCING),
* 0 otherwise
*/
u8_t
autoip_supplied_address(const struct netif *netif)
{
if ((netif != NULL) && (netif_autoip_data(netif) != NULL)) {
struct autoip* autoip = netif_autoip_data(netif);
return (autoip->state == AUTOIP_STATE_BOUND) || (autoip->state == AUTOIP_STATE_ANNOUNCING);
}
return 0;
}
u8_t
autoip_accept_packet(struct netif *netif, const ip4_addr_t *addr)
{
struct autoip* autoip = netif_autoip_data(netif);
return (autoip != NULL) && ip4_addr_cmp(addr, &(autoip->llipaddr));
}
#endif /* LWIP_IPV4 && LWIP_AUTOIP */