bool
arp_busy_status(void)
{
uint8_t status;
bool busy;
status = MEMORY_READ(8, ARP(STATUS));
status &= 0x01;
/* Busy? */
busy = (status == 0x00);
return busy;
}
char *
arp_version(void)
{
const char *arp_ver;
char *buf;
size_t ver_len;
arp_ver = (const char *)ARP(VERSION);
ver_len = 255;
if ((buf = (char *)malloc(ver_len + 1)) == NULL)
return NULL;
memcpy(buf, arp_ver, ver_len);
buf[ver_len] = '\0';
return buf;
}
/* Retarget a stack that's already been build to a different
* destination address, "daddr". "laddr" is supplied for convenience */
static bool_t retarget(struct udp_data *ud,
struct sockaddr_in *laddr,
struct sockaddr_in *daddr)
{
uint32_t NOCLOBBER arpaddr;
FlowMan_RouteInfo * NOCLOBBER ri = NULL;
FlowMan_SAP rsap;
Net_IPHostAddr ipaddr;
Net_EtherAddr hwaddr;
/* route the new dest addr, and make sure we don't need to change
* interface */
rsap.tag = FlowMan_PT_UDP;
rsap.u.UDP.addr.a = daddr->sin_addr.s_addr;
rsap.u.UDP.port = daddr->sin_port;
TRY {
ri = FlowMan$ActiveRoute(ud->fman, &rsap);
} CATCH_FlowMan$NoRoute() {
ri = NULL;
} ENDTRY;
if (!ri)
{
printf("retarget: no route to host %x\n",
ntohl(daddr->sin_addr.s_addr));
return False;
}
if (strcmp(ri->ifname, ud->curif))
{
printf("retarget: route to %x requires going through %s, but stack "
"is built to %s\n",
ntohl(daddr->sin_addr.s_addr),
ri->ifname,
ud->curif);
free(ri->ifname);
free(ri->type);
free(ri);
return False;
}
if (ri->gateway)
arpaddr = ri->gateway;
else
arpaddr = daddr->sin_addr.s_addr;
TRC(eprintf("retarget: ARPing for %I\n", arpaddr));
{
bool_t NOCLOBBER ok = True;
TRY {
FlowMan$ARP(ud->fman, arpaddr, &hwaddr);
} CATCH_Context$NotFound(UNUSED name) {
ok = False;
} ENDTRY;
if(!ok)
return False;
}
TRC(eprintf("Retargeted remote hwaddr: %02x:%02x:%02x:%02x:%02x:%02x%s\n",
hwaddr.a[0], hwaddr.a[1], hwaddr.a[2],
hwaddr.a[3], hwaddr.a[4], hwaddr.a[5],
(ri->gateway)?" (using gateway)":""));
free(ri->ifname);
free(ri);
Ether$SetDest(ud->eth, &hwaddr);
ipaddr.a = daddr->sin_addr.s_addr;
IP$SetDest(ud->ip, &ipaddr);
UDP$SetTXPort(ud->udp, daddr->sin_port);
return True;
}
