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Fixed bug #51623: DHCP request XID should probably be regenerated for INIT-REBOOT

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(cherry picked from commit a81b19aa62)
This commit is contained in:
goldsimon 2017-07-31 20:20:31 +02:00
parent 9b19266e3d
commit c51e6fbb12
1 changed files with 2 additions and 2 deletions
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4
src/core/ipv4/dhcp.c
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@ -736,7 +736,7 @@ dhcp_start(struct netif *netif)
/* no DHCP client attached yet? */ /* no DHCP client attached yet? */
if (dhcp == NULL) { if (dhcp == NULL) {
LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_start(): starting new DHCP client\n")); LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_start(): mallocing new DHCP client\n"));
dhcp = (struct dhcp *)mem_malloc(sizeof(struct dhcp)); dhcp = (struct dhcp *)mem_malloc(sizeof(struct dhcp));
if (dhcp == NULL) { if (dhcp == NULL) {
LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_start(): could not allocate dhcp\n")); LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_start(): could not allocate dhcp\n"));
@ -1832,7 +1832,7 @@ dhcp_create_msg(struct netif *netif, struct dhcp *dhcp, u8_t message_type)
(dhcp->p_out->len >= sizeof(struct dhcp_msg))); (dhcp->p_out->len >= sizeof(struct dhcp_msg)));
/* DHCP_REQUEST should reuse 'xid' from DHCPOFFER */ /* DHCP_REQUEST should reuse 'xid' from DHCPOFFER */
if (message_type != DHCP_REQUEST) { if ((message_type != DHCP_REQUEST) || (dhcp->state == DHCP_STATE_REBOOTING)) {
/* reuse transaction identifier in retransmissions */ /* reuse transaction identifier in retransmissions */
if (dhcp->tries == 0) { if (dhcp->tries == 0) {
#if DHCP_CREATE_RAND_XID && defined(LWIP_RAND) #if DHCP_CREATE_RAND_XID && defined(LWIP_RAND)