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Fix bug #50576: LWIP_NSC_IPV4_GATEWAY/NETMASK/SETTINGS_CHANGED should check if the setting is actually being changed

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This commit is contained in:
Dirk Ziegelmeier 2017-03-18 15:30:20 +01:00
parent 972b7c2bfd
commit 2d9ef2215b
1 changed files with 43 additions and 23 deletions
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20
src/core/netif.c
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@ -401,6 +401,16 @@ void
netif_set_addr(struct netif *netif, const ip4_addr_t *ipaddr, const ip4_addr_t *netmask,
const ip4_addr_t *gw)
{
#if LWIP_NETIF_EXT_STATUS_CALLBACK
u8_t something_changed = 0;
if ((ip4_addr_cmp(ipaddr, netif_ip4_addr(netif)) == 0) ||
(ip4_addr_cmp(gw, netif_ip4_gw(netif)) == 0) ||
(ip4_addr_cmp(netmask, netif_ip4_netmask(netif)) == 0)) {
something_changed = 1;
}
#endif
if (ip4_addr_isany(ipaddr)) {
/* when removing an address, we have to remove it *before* changing netmask/gw
to ensure that tcp RST segment can be sent correctly */
@ -414,7 +424,11 @@ netif_set_addr(struct netif *netif, const ip4_addr_t *ipaddr, const ip4_addr_t *
netif_set_ipaddr(netif, ipaddr);
}
#if LWIP_NETIF_EXT_STATUS_CALLBACK
if (something_changed != 0) {
netif_invoke_ext_callback(netif, LWIP_NSC_IPV4_SETTINGS_CHANGED, NULL);
}
#endif
}
#endif /* LWIP_IPV4*/
@ -597,6 +611,8 @@ netif_set_gw(struct netif *netif, const ip4_addr_t *gw)
args.ipv4_gw_changed.old_address = &old_addr;
#endif
/* address is actually being changed? */
if (ip4_addr_cmp(gw, netif_ip4_gw(netif)) == 0) {
ip4_addr_set(ip_2_ip4(&netif->gw), gw);
IP_SET_TYPE_VAL(netif->gw, IPADDR_TYPE_V4);
LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("netif: GW address of interface %c%c set to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
@ -607,6 +623,7 @@ netif_set_gw(struct netif *netif, const ip4_addr_t *gw)
ip4_addr4_16(netif_ip4_gw(netif))));
netif_invoke_ext_callback(netif, LWIP_NSC_IPV4_GATEWAY_CHANGED, &args);
}
}
/**
@ -629,6 +646,8 @@ netif_set_netmask(struct netif *netif, const ip4_addr_t *netmask)
args.ipv4_nm_changed.old_address = &old_addr;
#endif
/* address is actually being changed? */
if (ip4_addr_cmp(netmask, netif_ip4_netmask(netif)) == 0) {
mib2_remove_route_ip4(0, netif);
/* set new netmask to netif */
ip4_addr_set(ip_2_ip4(&netif->netmask), netmask);
@ -642,6 +661,7 @@ netif_set_netmask(struct netif *netif, const ip4_addr_t *netmask)
ip4_addr4_16(netif_ip4_netmask(netif))));
netif_invoke_ext_callback(netif, LWIP_NSC_IPV4_NETMASK_CHANGED, &args);
}
}
#endif /* LWIP_IPV4 */