wt/mongoose
1
0 Fork 0
mirror of https://github.com/cesanta/mongoose.git synced 2026-11-13 17:00:19 +00:00
Code Issues Packages Projects Releases Wiki Activity

Fix: DHCP client stuck in REQUESTING state forever if the REQUEST or ACK is lost

Browse Source
This commit is contained in:
cpq committed 2026-10-30 09:42:12 +00:00
1 parent b766c65615
commit 69e8c0a92f
3 files changed
+12
Download Patch File Download Diff File Expand all files Collapse all files

No files matched your search

src/net_builtin.c
+4
View File
@@ -734,6 +734,7 @@ static void rx_dhcp_client(struct mg_tcpip_if *ifp, struct pkt *pkt) {
: pkt->dhcp->siaddr ? pkt->dhcp->siaddr
: pkt->ip->src);
ifp->state = MG_TCPIP_STATE_REQ; // REQUESTING state
ifp->lease_expire = ifp->now + 5000; // No ACK by then: start over
} else if (msgtype == 5) { // DHCPACK
if (ifp->state == MG_TCPIP_STATE_REQ && ip && gw && lease) { // got an IP
uint64_t rand;
@@ -2041,6 +2042,9 @@ static void mg_ip_poll(struct mg_tcpip_if *ifp, bool s1) {
if (ifp->enable_dhcp_client && s1) {
if (ifp->state == MG_TCPIP_STATE_UP) {
tx_dhcp_discover(ifp); // INIT (4.4.1)
} else if (ifp->state == MG_TCPIP_STATE_REQ &&
ifp->now >= ifp->lease_expire) {
ifp->state = MG_TCPIP_STATE_UP; // REQUEST or ACK lost: DISCOVER again
} else if (ifp->state == MG_TCPIP_STATE_READY &&
ifp->lease_expire > 0) { // BOUND / RENEWING / REBINDING
if (ifp->now >= ifp->lease_expire) {