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feat(lwip/apps): only hand out DNS in DHCP if explicitly specified

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Showier Drastic 2024-07-04 10:50:34 +08:00
parent e7070e777a
commit c4e2274e05
1 changed files with 2 additions and 7 deletions
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7
components/lwip/apps/dhcpserver/dhcpserver.c
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@ -454,18 +454,13 @@ static u8_t *add_offer_options(dhcps_t *dhcps, u8_t *optptr)
} }
} }
if (dhcps_dns_enabled(dhcps->dhcps_dns)) {
*optptr++ = DHCP_OPTION_DNS_SERVER; *optptr++ = DHCP_OPTION_DNS_SERVER;
*optptr++ = 4; *optptr++ = 4;
if (dhcps_dns_enabled(dhcps->dhcps_dns)) {
*optptr++ = ip4_addr1(&dhcps->dns_server); *optptr++ = ip4_addr1(&dhcps->dns_server);
*optptr++ = ip4_addr2(&dhcps->dns_server); *optptr++ = ip4_addr2(&dhcps->dns_server);
*optptr++ = ip4_addr3(&dhcps->dns_server); *optptr++ = ip4_addr3(&dhcps->dns_server);
*optptr++ = ip4_addr4(&dhcps->dns_server); *optptr++ = ip4_addr4(&dhcps->dns_server);
}else {
*optptr++ = ip4_addr1(&ipadd);
*optptr++ = ip4_addr2(&ipadd);
*optptr++ = ip4_addr3(&ipadd);
*optptr++ = ip4_addr4(&ipadd);
} }
ip4_addr_t broadcast_addr = { .addr = (ipadd.addr & dhcps->dhcps_mask.addr) | ~dhcps->dhcps_mask.addr }; ip4_addr_t broadcast_addr = { .addr = (ipadd.addr & dhcps->dhcps_mask.addr) | ~dhcps->dhcps_mask.addr };