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lwip: Fix DHCP Server to remove clients record if request not acked

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When client's request refused by sending NAK, its record still resided
in the linked list of pooled addresses. It is okay from the spec
perspective (RFC2131.p16: Server MAY mark the offered address
unavailable), but would consume some memory if the client didn't retry.

Closes https://github.com/espressif/esp-idf/issues/6410
This commit is contained in:
David Cermak
2021-01-22 09:29:21 +01:00
committed by bot
parent 8d476269d6
commit 96911fb7ea
1 changed files with 1 additions and 1 deletions
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2
components/lwip/apps/dhcpserver/dhcpserver.c
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@@ -916,7 +916,7 @@ POOL_CHECK:
s16_t ret = parse_options(&m->options[4], len);; s16_t ret = parse_options(&m->options[4], len);;
if (ret == DHCPS_STATE_RELEASE) { if (ret == DHCPS_STATE_RELEASE || ret == DHCPS_STATE_NAK) {
if (pnode != NULL) { if (pnode != NULL) {
node_remove_from_list(&plist, pnode); node_remove_from_list(&plist, pnode);
free(pnode); free(pnode);