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RDKB-66929 : [Rogers][8.6p4s4] Device inaccessible and loses internet | When GW switch back to router from bridge mode. #231

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LakshminarayananShenbagaraj wants to merge 3 commits into from
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RDKB-66929 : [Rogers][8.6p4s4] Device inaccessible and loses internet | When GW switch back to router from bridge mode. #231

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RDKB-66929 : [Rogers][8.6p4s4] Device inaccessible and loses internet…
LakshminarayananShenbagaraj Sep 16, 2026
d97da0d
RDKB-66929 : [Rogers][8.6p4s4] Device inaccessible and loses internet…
LakshminarayananShenbagaraj Sep 16, 2026
69360fe
RDKB-66929 : [Rogers][8.6p4s4] Device inaccessible and loses internet…
LakshminarayananShenbagaraj Sep 23, 2026
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5 changes: 3 additions & 2 deletions source/TR-181/middle_layer_src/wanmgr_rbus_handler_apis.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1960,8 +1960,9 @@ ANSC_STATUS WanMgr_Configure_TAD_WCC(DML_VIRTUAL_IFACE *p_VirtIf, WCC_EVENT Eve
int iErrorCode = 0;


if(Event != WCC_STOP && (p_VirtIf->IP.Ipv4Data.dnsServer[0] == '\0') && (p_VirtIf->IP.Ipv4Data.dnsServer1[0] == '\0') &&
(p_VirtIf->IP.Ipv6Data.nameserver[0] == '\0') && (p_VirtIf->IP.Ipv6Data.nameserver1[0] == '\0'))
if(Event != WCC_STOP && ((p_VirtIf->IP.Ipv4Data.dnsServer[0] == '\0') && (p_VirtIf->IP.Ipv4Data.dnsServer1[0] == '\0') &&
(p_VirtIf->IP.Ipv6Data.nameserver[0] == '\0') && (p_VirtIf->IP.Ipv6Data.nameserver1[0] == '\0')) ||
((p_VirtIf->IP.Ipv6RA.acDefaultGw[0] == '\0') && (p_VirtIf->IP.Ipv4Data.gateway[0] == '\0')))
{
CcspTraceError(("%s %d: DNS servers are not configured. (TAD) DNS health check not triggered\n",__FUNCTION__, __LINE__));
return ANSC_STATUS_FAILURE;
Expand Down
4 changes: 4 additions & 0 deletions source/WanManager/wanmgr_dhcp_event_handler.c
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Expand Up @@ -186,6 +186,8 @@ void WanMgr_ProcessDhcpClientEvent(DhcpEventThreadArgs *eventData)

copyDhcpv4Data(&(pVirtIf->IP.Ipv4Data), &(eventData->lease.v4));
pVirtIf->IP.Ipv4Changed = TRUE;
CcspTraceInfo(("%s %d - IPv4 - RestartConnectivityCheck triggered. \n", __FUNCTION__, __LINE__));
pVirtIf->IP.RestartConnectivityCheck = TRUE;
WanManager_UpdateInterfaceStatus(pVirtIf, WANMGR_IFACE_CONNECTION_UP);

char param_name[256] = {0};
Expand Down Expand Up @@ -238,6 +240,8 @@ void WanMgr_ProcessDhcpClientEvent(DhcpEventThreadArgs *eventData)
DHCP_MGR_IPV6_MSG* leaseInfo = &(eventData->lease.v6);
copyDhcpv6Data(&(pVirtIf->IP.Ipv6Data), leaseInfo);
pVirtIf->IP.Ipv6Changed = TRUE;
CcspTraceInfo(("%s %d - IPv6 - RestartConnectivityCheck triggered. \n", __FUNCTION__, __LINE__));
pVirtIf->IP.RestartConnectivityCheck = TRUE;
//TODO : WAN ip creation from IA_PD if required. address assignment on LAN bridge.
WanManager_UpdateInterfaceStatus(pVirtIf, WANMGR_IFACE_CONNECTION_IPV6_UP);

Expand Down
79 changes: 55 additions & 24 deletions source/WanManager/wanmgr_interface_sm.c
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Expand Up @@ -20,6 +20,7 @@
#include <unistd.h>
#include <pthread.h>
#include <ifaddrs.h>
#include <linux/if_addr.h>
#include <sys/syscall.h>
#include "wanmgr_interface_sm.h"
#include "wanmgr_utils.h"
Expand Down Expand Up @@ -1033,6 +1034,51 @@ int wan_updateDNS(WanMgr_IfaceSM_Controller_t* pWanIfaceCtrl, BOOL addIPv4, BOOL
}


static int WanMgr_IsIpv6DADComplete(const char *ifName)
{
char address[33] = {0};
char device[64] = {0};
char line[BUFLEN_128] = {0};
int addressFound = 0;
int dadIncomplete = 0;
unsigned int ifIndex = 0;
unsigned int prefixLength = 0;
unsigned int scope = 0;
unsigned int flags = 0;
FILE *fp = NULL;

if (ifName == NULL || ifName[0] == '\0')
{
return 0;
}

fp = fopen("/proc/net/if_inet6", "r");

if (fp == NULL)
{
CcspTraceError(("%s %d - Failed to open /proc/net/if_inet6: %s\n",
__FUNCTION__, __LINE__, strerror(errno)));
return 0;
}

while (fgets(line, sizeof(line), fp) != NULL)
{
if (sscanf(line, "%32s %x %x %x %x %63s", address, &ifIndex,
&prefixLength, &scope, &flags, device) == 6 &&
strcmp(device, ifName) == 0)
{
addressFound = 1;
if ((flags & (IFA_F_TENTATIVE | IFA_F_DADFAILED)) != 0)
{
dadIncomplete = 1;
}
}
}

fclose(fp);
return addressFound && !dadIncomplete;
}

/**
* @brief Checks if the IPv6 address is ready to use.
*
Expand All @@ -1046,7 +1092,6 @@ int wan_updateDNS(WanMgr_IfaceSM_Controller_t* pWanIfaceCtrl, BOOL addIPv4, BOOL
static int checkIpv6AddressIsReadyToUse(DML_VIRTUAL_IFACE* p_VirtIf)
{
char buffer[BUFLEN_256] = {0};
FILE *fp_dad = NULL;
FILE *fp_route = NULL;
int dad_flag = 0;
int route_flag = 0;
Expand All @@ -1060,30 +1105,13 @@ static int checkIpv6AddressIsReadyToUse(DML_VIRTUAL_IFACE* p_VirtIf)

for(int i=0; i<15; i++)
{
buffer[0] = '\0';
if(dad_flag == 0)
{
if ((fp_dad = v_secure_popen("r","ip address show dev %s tentative", p_VirtIf->Name)))
{
if(fp_dad != NULL)
{
fgets(buffer, BUFLEN_256, fp_dad);
if(strlen(buffer) == 0 )
{
dad_flag = 1;
}
v_secure_pclose(fp_dad);
}
}
}
if(dad_flag == 0)
{
sleep(1);
}
else
if (WanMgr_IsIpv6DADComplete(p_VirtIf->Name))
{
dad_flag = 1;
break;
}

sleep(1);
}

buffer[0] = '\0';
Expand Down Expand Up @@ -1892,8 +1920,11 @@ static ANSC_STATUS WanMgr_StartConnectivityCheck(WanMgr_IfaceSM_Controller_t* pW
if(pVirtIf->IP.ConnectivityCheckType == WAN_CONNECTIVITY_TYPE_TAD)
{
CcspTraceInfo(("%s %d ConnectivityCheck Type is TAD \n", __FUNCTION__, __LINE__));
WanMgr_Configure_TAD_WCC( pVirtIf, (pVirtIf->IP.ConnectivityCheckRunning && pVirtIf->IP.RestartConnectivityCheck) ? WCC_RESTART : WCC_START);
pVirtIf->IP.ConnectivityCheckRunning = TRUE;
if ( WanMgr_Configure_TAD_WCC( pVirtIf, (pVirtIf->IP.ConnectivityCheckRunning && pVirtIf->IP.RestartConnectivityCheck) ? WCC_RESTART : WCC_START) == ANSC_STATUS_SUCCESS )
{
CcspTraceInfo(("%s %d - Successfully configured TAD WCC for interface %s \n", __FUNCTION__, __LINE__, pVirtIf->Name));
pVirtIf->IP.ConnectivityCheckRunning = TRUE;
}
Comment on lines +1923 to +1927
}
else if(pVirtIf->IP.ConnectivityCheckType == WAN_CONNECTIVITY_TYPE_IHC)
{
Expand Down
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