Commit 95e85c74 authored by Marcel Stör's avatar Marcel Stör Committed by GitHub
Browse files

Revert "with this small fix, the DNS engine is RFC 5452 compliant because it …" (#1465)

parent 6e25b747
......@@ -156,11 +156,6 @@ void udp_input (struct pbuf *p, struct netif *inp)ICACHE_FLASH_
#define udp_init() /* Compatibility define, not init needed. */
#ifndef UDP_LOCAL_PORT_RANGE_START
#define UDP_LOCAL_PORT_RANGE_START 4096
#define UDP_LOCAL_PORT_RANGE_END 0x7fff
#endif
#if UDP_DEBUG
void udp_debug_print(struct udp_hdr *udphdr)ICACHE_FLASH_ATTR;
#else
......
......@@ -254,14 +254,8 @@ dns_init()
LWIP_ASSERT("For implicit initialization to work, DNS_STATE_UNUSED needs to be 0",
DNS_STATE_UNUSED == 0);
/* initialize DNS client, try to get RFC 5452 random source port */
u16_t port = UDP_LOCAL_PORT_RANGE_START + (os_random() % (UDP_LOCAL_PORT_RANGE_END - UDP_LOCAL_PORT_RANGE_START));
for(;;) {
if(udp_bind(dns_pcb, IP_ADDR_ANY, port) == ERR_OK)
break;
LWIP_ASSERT("Unable to get a PCB for DNS", port != 0);
port=0; // try again with random source
}
/* initialize DNS client */
udp_bind(dns_pcb, IP_ADDR_ANY, 0);
udp_recv(dns_pcb, dns_recv, NULL);
/* initialize default DNS primary server */
......
......@@ -758,6 +758,10 @@ udp_bind(struct udp_pcb *pcb, ip_addr_t *ipaddr, u16_t port)
/* no port specified? */
if (port == 0) {
#ifndef UDP_LOCAL_PORT_RANGE_START
#define UDP_LOCAL_PORT_RANGE_START 4096
#define UDP_LOCAL_PORT_RANGE_END 0x7fff
#endif
port = UDP_LOCAL_PORT_RANGE_START;
ipcb = udp_pcbs;
while ((ipcb != NULL) && (port != UDP_LOCAL_PORT_RANGE_END)) {
......
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