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Diffstat (limited to 'slirp/bootp.c')
-rw-r--r--slirp/bootp.c35
1 files changed, 31 insertions, 4 deletions
diff --git a/slirp/bootp.c b/slirp/bootp.c
index 7e4b5bab0b..755072db83 100644
--- a/slirp/bootp.c
+++ b/slirp/bootp.c
@@ -33,6 +33,7 @@
typedef struct {
uint8_t allocated;
+ uint8_t macaddr[6];
} BOOTPClient;
BOOTPClient bootp_clients[NB_ADDR];
@@ -63,6 +64,23 @@ static BOOTPClient *get_new_addr(struct in_addr *paddr)
return bc;
}
+static BOOTPClient *find_addr(struct in_addr *paddr, const uint8_t *macaddr)
+{
+ BOOTPClient *bc;
+ int i;
+
+ for(i = 0; i < NB_ADDR; i++) {
+ if (!memcmp(macaddr, bootp_clients[i].macaddr, 6))
+ goto found;
+ }
+ return NULL;
+ found:
+ bc = &bootp_clients[i];
+ bc->allocated = 1;
+ paddr->s_addr = htonl(ntohl(special_addr.s_addr) | (i + START_ADDR));
+ return bc;
+}
+
static void dhcp_decode(const uint8_t *buf, int size,
int *pmsg_type)
{
@@ -131,10 +149,19 @@ static void bootp_reply(struct bootp_t *bp)
m->m_data += sizeof(struct udpiphdr);
memset(rbp, 0, sizeof(struct bootp_t));
- bc = get_new_addr(&daddr.sin_addr);
- if (!bc) {
- dprintf("no address left\n");
- return;
+ if (dhcp_msg_type == DHCPDISCOVER) {
+ bc = get_new_addr(&daddr.sin_addr);
+ if (!bc) {
+ dprintf("no address left\n");
+ return;
+ }
+ memcpy(bc->macaddr, client_ethaddr, 6);
+ } else {
+ bc = find_addr(&daddr.sin_addr, bp->bp_hwaddr);
+ if (!bc) {
+ dprintf("no address assigned\n");
+ return;
+ }
}
dprintf("offered addr=%08x\n", ntohl(daddr.sin_addr.s_addr));