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DECLINE message was unicast instead of broadcast

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This commit is contained in:
likewise
2004-11-25 11:10:53 +00:00
parent bb87d19e84
commit fab107a9df
3 changed files with 18 additions and 5 deletions
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6
src/core/dhcp.c
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@@ -679,8 +679,10 @@ static err_t dhcp_decline(struct netif *netif)
pbuf_realloc(dhcp->p_out, sizeof(struct dhcp_msg) - DHCP_OPTIONS_LEN + dhcp->options_out_len);
udp_bind(dhcp->pcb, IP_ADDR_ANY, DHCP_CLIENT_PORT);
udp_connect(dhcp->pcb, &dhcp->server_ip_addr, DHCP_SERVER_PORT);
udp_send(dhcp->pcb, dhcp->p_out);
/* @todo: should we really connect here? we are performing sendto() */
udp_connect(dhcp->pcb, IP_ADDR_ANY, DHCP_SERVER_PORT);
/* per section 4.4.4, broadcast DECLINE messages */
udp_sendto(dhcp->pcb, dhcp->p_out, IP_ADDR_BROADCAST, DHCP_SERVER_PORT);
dhcp_delete_request(netif);
LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_decline: BACKING OFF\n"));
} else {

9
src/core/udp.c
View File

@@ -356,9 +356,10 @@ udp_sendto(struct udp_pcb *pcb, struct pbuf *p,
struct ip_addr *dst_ip, u16_t dst_port)
{
err_t err;
/* temporary space for current PCB remote address */
struct ip_addr pcb_remote_ip;
u16_t pcb_remote_port;
/* remember remote peer address of PCB */
/* remember current remote peer address of PCB */
pcb_remote_ip.addr = pcb->remote_ip.addr;
pcb_remote_port = pcb->remote_port;
/* copy packet destination address to PCB remote peer address */
@@ -366,7 +367,7 @@ udp_sendto(struct udp_pcb *pcb, struct pbuf *p,
pcb->remote_port = dst_port;
/* send to the packet destination address */
err = udp_send(pcb, p);
/* reset PCB remote peer address */
/* restore PCB remote peer address */
pcb->remote_ip.addr = pcb_remote_ip.addr;
pcb->remote_port = pcb_remote_port;
return err;
@@ -433,7 +434,9 @@ udp_send(struct udp_pcb *pcb, struct pbuf *p)
udphdr->chksum = 0x0000;
/* find the outgoing network interface for this packet */
if ((netif = ip_route(&(pcb->remote_ip))) == NULL) {
netif = ip_route(&(pcb->remote_ip));
/* no outgoing network interface could be found? */
if (netif == NULL) {
LWIP_DEBUGF(UDP_DEBUG | 1, ("udp_send: No route to 0x%lx\n", pcb->remote_ip.addr));
UDP_STATS_INC(udp.rterr);
return ERR_RTE;