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feat(dhcps): Support for multiple DNS servers

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Lorenzo Consolaro
2024-12-20 09:21:27 +01:00
committed by BOT
parent 838a24e7f6
commit a5e37f8cdf
3 changed files with 54 additions and 22 deletions
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55
components/lwip/apps/dhcpserver/dhcpserver.c
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@@ -125,7 +125,7 @@ struct dhcps_t {
struct netif *dhcps_netif;
ip4_addr_t broadcast_dhcps;
ip4_addr_t server_address;
ip4_addr_t dns_server;
ip4_addr_t dns_server[DNS_TYPE_MAX];
ip4_addr_t client_address;
ip4_addr_t client_address_plus;
ip4_addr_t dhcps_mask;
@@ -154,7 +154,10 @@ dhcps_t *dhcps_new(void)
return NULL;
}
dhcps->dhcps_netif = NULL;
dhcps->dns_server.addr = 0;
for (int i = 0; i < DNS_TYPE_MAX; i++) {
dhcps->dns_server[i].addr = 0;
}
#ifdef USE_CLASS_B_NET
dhcps->dhcps_mask.addr = PP_HTONL(LWIP_MAKEU32(255, 240, 0, 0));
#else
@@ -443,14 +446,32 @@ static u8_t *add_offer_options(dhcps_t *dhcps, u8_t *optptr)
}
}
*optptr++ = DHCP_OPTION_DNS_SERVER;
*optptr++ = 4;
// In order of preference
if (dhcps_dns_enabled(dhcps->dhcps_dns)) {
*optptr++ = ip4_addr1(&dhcps->dns_server);
*optptr++ = ip4_addr2(&dhcps->dns_server);
*optptr++ = ip4_addr3(&dhcps->dns_server);
*optptr++ = ip4_addr4(&dhcps->dns_server);
}else {
uint8_t size = 4;
if (dhcps->dns_server[DNS_TYPE_BACKUP].addr) {
size += 4;
}
*optptr++ = DHCP_OPTION_DNS_SERVER;
*optptr++ = size;
*optptr++ = ip4_addr1(&dhcps->dns_server[DNS_TYPE_MAIN]);
*optptr++ = ip4_addr2(&dhcps->dns_server[DNS_TYPE_MAIN]);
*optptr++ = ip4_addr3(&dhcps->dns_server[DNS_TYPE_MAIN]);
*optptr++ = ip4_addr4(&dhcps->dns_server[DNS_TYPE_MAIN]);
if (dhcps->dns_server[DNS_TYPE_BACKUP].addr) {
*optptr++ = ip4_addr1(&dhcps->dns_server[DNS_TYPE_BACKUP]);
*optptr++ = ip4_addr2(&dhcps->dns_server[DNS_TYPE_BACKUP]);
*optptr++ = ip4_addr3(&dhcps->dns_server[DNS_TYPE_BACKUP]);
*optptr++ = ip4_addr4(&dhcps->dns_server[DNS_TYPE_BACKUP]);
}
#ifdef CONFIG_LWIP_DHCPS_ADD_DNS
} else {
*optptr++ = DHCP_OPTION_DNS_SERVER;
*optptr++ = 4;
*optptr++ = ip4_addr1(&ipadd);
*optptr++ = ip4_addr2(&ipadd);
*optptr++ = ip4_addr3(&ipadd);
@@ -1519,17 +1540,18 @@ bool dhcp_search_ip_on_mac(dhcps_t *dhcps, u8_t *mac, ip4_addr_t *ip)
* FunctionName : dhcps_dns_setserver
* Description : set DNS server address for dhcpserver
* Parameters : dnsserver -- The DNS server address
* type -- The DNS type
* Returns : ERR_ARG if invalid handle, ERR_OK on success
*******************************************************************************/
err_t dhcps_dns_setserver(dhcps_t *dhcps, const ip_addr_t *dnsserver)
err_t dhcps_dns_setserver(dhcps_t *dhcps, const ip_addr_t *dnsserver, dns_type_t type)
{
if (dhcps == NULL) {
return ERR_ARG;
}
if (dnsserver != NULL) {
dhcps->dns_server = *(ip_2_ip4(dnsserver));
dhcps->dns_server[type] = *(ip_2_ip4(dnsserver));
} else {
dhcps->dns_server = *(ip_2_ip4(IP_ADDR_ANY));
dhcps->dns_server[type] = *(ip_2_ip4(IP_ADDR_ANY));
}
return ERR_OK;
}
@@ -1537,13 +1559,14 @@ err_t dhcps_dns_setserver(dhcps_t *dhcps, const ip_addr_t *dnsserver)
/******************************************************************************
* FunctionName : dhcps_dns_getserver
* Description : get DNS server address for dhcpserver
* Parameters : none
* Returns : ip4_addr_t
* Parameters : dnsserver -- The DNS server address
* type -- The DNS type
* Returns : ERR_ARG if invalid handle, ERR_OK on success
*******************************************************************************/
err_t dhcps_dns_getserver(dhcps_t *dhcps, ip4_addr_t *dnsserver)
err_t dhcps_dns_getserver(dhcps_t *dhcps, ip4_addr_t *dnsserver, dns_type_t type)
{
if (dhcps) {
*dnsserver = dhcps->dns_server;
*dnsserver = dhcps->dns_server[type];
return ERR_OK;
}
return ERR_ARG;