Correct UDP rebind check.

Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
8 years ago · 8e23b8d903
1 changed files with 3 additions and 2 deletions
--- a/src/core/udp.c
+++ b/src/core/udp.c
@ -984,8 +984,9 @@ udp_bind(struct udp_pcb *pcb, const ip_addr_t *ipaddr, u16_t port)
        {
          /* port matches that of PCB in list and REUSEADDR not set -> reject */
          if ((ipcb->local_port == port) &&
-              /* IP address matches? */
-              ip_addr_cmp(&ipcb->local_ip, ipaddr)) {
+              /* IP address matches or any IP used? */
+              (ip_addr_cmp(&ipcb->local_ip, ipaddr) || ip_addr_isany(ipaddr) ||
+              ip_addr_isany(&ipcb->local_ip))) {
            /* other PCB already binds to this local IP and port */
            LWIP_DEBUGF(UDP_DEBUG,
                        ("udp_bind: local port %"U16_F" already bound by another pcb\n", port));