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Fixed bug #30039: AutoIP does not reuse previous addresses

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This commit is contained in:
goldsimon 2010-06-14 20:27:14 +00:00
parent 435115d4fb
commit 5ab40f016d
2 changed files with 17 additions and 4 deletions
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3
CHANGELOG
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@ -220,6 +220,9 @@ HISTORY
++ Bugfixes:
2010-06-14: Simon Goldschmidt
* autoip.c: Fixed bug #30039: AutoIP does not reuse previous addresses
2010-06-12: Simon Goldschmidt
* dhcp.c: Fixed bug #30038: dhcp_network_changed doesn't reset AUTOIP coop
state

18
src/core/ipv4/autoip.c
View File

@ -150,6 +150,17 @@ autoip_set_struct(struct netif *netif, struct autoip *autoip)
netif->autoip = autoip;
}
/** Restart AutoIP client and check the next address (conflict detected)
*
* @param netif The netif under AutoIP control
*/
static void
autoip_restart(struct netif *netif)
{
netif->autoip->tried_llipaddr++;
autoip_start(netif);
}
/**
* Handle a IP address conflict after an ARP conflict detection
*/
@ -168,7 +179,7 @@ autoip_handle_arp_conflict(struct netif *netif)
("autoip_handle_arp_conflict(): we are defending, but in DEFEND_INTERVAL, retreating\n"));
/* TODO: close all TCP sessions */
autoip_start(netif);
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"));
@ -179,7 +190,7 @@ autoip_handle_arp_conflict(struct netif *netif)
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_start(netif);
autoip_restart(netif);
}
}
@ -321,7 +332,6 @@ autoip_start(struct netif *netif)
}
autoip_create_addr(netif, &(autoip->llipaddr));
autoip->tried_llipaddr++;
autoip_start_probing(netif);
return result;
@ -511,7 +521,7 @@ autoip_arp_reply(struct netif *netif, struct etharp_hdr *hdr)
!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"));
autoip_start(netif);
autoip_restart(netif);
}
} else {
/* RFC 3927 Section 2.5: