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dhserver: Support DHCP clients that don't send the MESSAGETYPE as first option

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Signed-off-by: Jannis Achstetter <kripton@kripserver.net>
This commit is contained in:
Jannis Achstetter
2022-11-01 23:42:58 +01:00
parent 28f49c088b
commit 3f3f6eee1c
1 changed files with 5 additions and 1 deletions
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6
lib/networking/dhserver.c
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@@ -240,7 +240,11 @@ static void udp_recv_proc(void *arg, struct udp_pcb *upcb, struct pbuf *p, const
unsigned n = p->len; unsigned n = p->len;
if (n > sizeof(dhcp_data)) n = sizeof(dhcp_data); if (n > sizeof(dhcp_data)) n = sizeof(dhcp_data);
memcpy(&dhcp_data, p->payload, n); memcpy(&dhcp_data, p->payload, n);
switch (dhcp_data.dp_options[2])
ptr = find_dhcp_option(dhcp_data.dp_options, sizeof(dhcp_data.dp_options), DHCP_MESSAGETYPE);
if (ptr == NULL) return;
switch (ptr[2])
{ {
case DHCP_DISCOVER: case DHCP_DISCOVER:
entry = entry_by_mac(dhcp_data.dp_chaddr); entry = entry_by_mac(dhcp_data.dp_chaddr);