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Need to preserve IP address from spurious OFFERs as well

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@449 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo 2007-12-11 23:10:47 +00:00
parent bacff222e1
commit cd2decaedb
1 changed files with 9 additions and 7 deletions
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16
netutils/dhcpc/dhcpc.c
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@ -125,6 +125,7 @@ struct dhcpc_state_s
const void *ds_macaddr;
int ds_maclen;
int sockfd;
struct in_addr ipaddr;
struct in_addr serverid;
struct dhcp_msg packet;
};
@ -160,11 +161,11 @@ static uint8 *dhcpc_addserverid(struct in_addr *serverid, uint8 *optptr)
return optptr + 4;
}
static uint8 *dhcpc_addreqipaddr(struct dhcpc_state *presult, uint8 *optptr)
static uint8 *dhcpc_addreqipaddr(struct in_addr *ipaddr, uint8 *optptr)
{
*optptr++ = DHCP_OPTION_REQ_IPADDR;
*optptr++ = 4;
memcpy(optptr, &presult->ipaddr.s_addr, 4);
memcpy(optptr, &ipaddr->s_addr, 4);
return optptr + 4;
}
@ -223,16 +224,16 @@ static int dhcpc_sendmsg(struct dhcpc_state_s *pdhcpc,
pend = dhcpc_addreqoptions(pend);
break;
/* Send REQUEST message to the server that send the OFFER */
/* Send REQUEST message to the server that sent the *first* OFFER */
case DHCPREQUEST:
pdhcpc->packet.flags = HTONS(BOOTP_BROADCAST); /* Broadcast bit. */
memcpy(pdhcpc->packet.ciaddr, &presult->ipaddr.s_addr, 4);
memcpy(pdhcpc->packet.ciaddr, &pdhcpc->ipaddr.s_addr, 4);
pend = dhcpc_addserverid(&pdhcpc->serverid, pend);
pend = dhcpc_addreqipaddr(presult, pend);
pend = dhcpc_addreqipaddr(&pdhcpc->ipaddr, pend);
break;
/* Send DECLINE message to the server that sent the OFFER */
/* Send DECLINE message to the server that sent the *last* OFFER */
case DHCPDECLINE:
memcpy(pdhcpc->packet.ciaddr, &presult->ipaddr.s_addr, 4);
@ -451,7 +452,8 @@ int dhcpc_request(void *handle, struct dhcpc_state *presult)
*/
dbg("Received OFFER from %08x\n", ntohl(presult->serverid.s_addr));
pdhcpc->serverid.s_addr = presult->serverid.s_addr;
pdhcpc->ipaddr.s_addr = presult->ipaddr.s_addr;
pdhcpc->serverid.s_addr = presult->serverid.s_addr;
/* Temporarily use the address offered by the server and break
* out of the loop.