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Merge pull request #414 from DrDoof/fix/dhcp-restart-leak

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dhcp: do not leave the old socket behind when starting again
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René van Dorst authored and GitHub committed 2026-09-08 22:19:18 +00:00
2 parents 5b28ddf80a 4bcbada764
commit b2b7f8a0c6
1 file changed
+6
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dhcp.c
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@@ -353,6 +353,12 @@ void parse_dhcp(void)
void dhcp_start(void) __banked
{
/* Starting twice would leave the first socket bound: uip_udp_new() takes
* the next free slot while the old one keeps port 68, and dhcp_callback()
* matches on that port rather than on the connection, so every leftover
* runs the state machine too and the timers count down once per socket. */
if (dhcp_state.state != DHCP_OFF)
dhcp_stop();
uip_ipaddr(server, 255,255,255,255);
dhcp_state.conn = uip_udp_new(&server, HTONS(DHCPC_SERVER_PORT));
dhcp_state.current_ip[0] = dhcp_state.current_ip[1] = dhcp_state.current_ip[2] = dhcp_state.current_ip[3] = 0;