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udp: restructure udp_input uncon_pcb selection in preparation for fixing bug #53301

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This commit is contained in:
Simon Goldschmidt 2018-06-13 21:59:04 +02:00
parent 47ebb2b267
commit 1bdc669b45
1 changed files with 9 additions and 7 deletions
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16
src/core/udp.c
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@ -261,15 +261,17 @@ udp_input(struct pbuf *p, struct netif *inp)
/* compare PCB local addr+port to UDP destination addr+port */
if ((pcb->local_port == dest) &&
(udp_input_local_match(pcb, inp, broadcast) != 0)) {
if (((pcb->flags & UDP_FLAGS_CONNECTED) == 0) &&
((uncon_pcb == NULL)
if ((pcb->flags & UDP_FLAGS_CONNECTED) == 0) {
if (uncon_pcb == NULL) {
/* the first unconnected matching PCB */
uncon_pcb = pcb;
}
#if SO_REUSE
/* prefer specific IPs over cath-all */
|| !ip_addr_isany(&pcb->local_ip)
else if (!ip_addr_isany(&pcb->local_ip)) {
/* prefer specific IPs over catch-all */
uncon_pcb = pcb;
}
#endif /* SO_REUSE */
)) {
/* the first unconnected matching PCB */
uncon_pcb = pcb;
}
/* compare PCB remote addr+port to UDP source addr+port */