static void TftpSend (void) {
volatile unsigned char * pkt;
volatile unsigned char * xp;
int len = 0;
/*
* We will always be sending some sort of packet, so
* cobble together the packet headers now.
*/
pkt = NetTxPacket + ETHER_HDR_SIZE + IP_HDR_SIZE;
switch (TftpState) {
case STATE_RRQ:
xp = pkt;
*((unsigned short *) pkt) = TFTP_RRQ;
pkt += sizeof(unsigned short);
strcpy ((char *) pkt, tftp_filename);
pkt += strlen(tftp_filename) + 1;
strcpy ((char *) pkt, "octet");
pkt += 5 /*strlen("octet")*/ + 1;
len = pkt - xp;
break;
case STATE_DATA:
xp = pkt;
*((unsigned short *) pkt) = TFTP_ACK;
pkt += sizeof(unsigned short);
*((unsigned short *) pkt) = TftpBlock;
pkt += sizeof(unsigned short);
len = pkt - xp;
break;
case STATE_TOO_LARGE:
xp = pkt;
*((unsigned short *) pkt) = TFTP_ERROR;
pkt += sizeof(unsigned short);
*((unsigned short *) pkt) = 3;
pkt += sizeof(unsigned short);
strcpy ((char *)pkt, "File too large");
pkt += 14 /*strlen("File too large")*/ + 1;
len = pkt - xp;
break;
case STATE_BAD_MAGIC:
xp = pkt;
*((unsigned short *) pkt) = TFTP_ERROR;
pkt += sizeof(unsigned short);
*((unsigned short *) pkt) = 2;
pkt += sizeof(unsigned short);
strcpy ((char *) pkt, "File has bad magic");
pkt += 18 /*strlen("File has bad magic")*/ + 1;
len = pkt - xp;
break;
}
NetSetEther(NetTxPacket, NetServerEther, PROT_IP);
NetSetIP(NetTxPacket + ETHER_HDR_SIZE, NetServerIP, TftpServerPort, TftpOurPort, len);
NetSendPacket(NetTxPacket, ETHER_HDR_SIZE + IP_HDR_SIZE + len);
}
void
RarpRequest (void)
{
int i;
volatile uchar *pkt;
ARP_t * rarp;
printf("RARP broadcast %d\n", ++RarpTry);
pkt = NetTxPacket;
pkt += NetSetEther(pkt, NetBcastAddr, PROT_RARP);
rarp = (ARP_t *)pkt;
rarp->ar_hrd = htons (ARP_ETHER);
rarp->ar_pro = htons (PROT_IP);
rarp->ar_hln = 6;
rarp->ar_pln = 4;
rarp->ar_op = htons (RARPOP_REQUEST);
memcpy (&rarp->ar_data[0], NetOurEther, 6); /* source ET addr */
memcpy (&rarp->ar_data[6], &NetOurIP, 4); /* source IP addr */
memcpy (&rarp->ar_data[10], NetOurEther, 6); /* dest ET addr = source ET addr ??*/
/* dest. IP addr set to broadcast */
for (i = 0; i <= 3; i++) {
rarp->ar_data[16 + i] = 0xff;
}
NetSendPacket(NetTxPacket, (pkt - NetTxPacket) + ARP_HDR_SIZE);
NetSetTimeout(TIMEOUT, RarpTimeout);
NetSetHandler(RarpHandler);
}
static int ping_send(void)
{
uchar *pkt;
int eth_hdr_size;
/* XXX always send arp request */
debug_cond(DEBUG_DEV_PKT, "sending ARP for %pI4\n", &NetPingIP);
NetArpWaitPacketIP = NetPingIP;
eth_hdr_size = NetSetEther(NetTxPacket, NetEtherNullAddr, PROT_IP);
pkt = (uchar *)NetTxPacket + eth_hdr_size;
set_icmp_header(pkt, NetPingIP);
/* size of the waiting packet */
NetArpWaitTxPacketSize = eth_hdr_size + IP_ICMP_HDR_SIZE;
/* and do the ARP request */
NetArpWaitTry = 1;
NetArpWaitTimerStart = get_timer(0);
ArpRequest();
return 1; /* waiting */
}
void arp_raw_request(IPaddr_t sourceIP, const uchar *targetEther,
IPaddr_t targetIP)
{
uchar *pkt;
struct arp_hdr *arp;
int eth_hdr_size;
debug_cond(DEBUG_DEV_PKT, "ARP broadcast %d\n", NetArpWaitTry);
pkt = NetArpTxPacket;
eth_hdr_size = NetSetEther(pkt, NetBcastAddr, PROT_ARP);
pkt += eth_hdr_size;
arp = (struct arp_hdr *) pkt;
arp->ar_hrd = htons(ARP_ETHER);
arp->ar_pro = htons(PROT_IP);
arp->ar_hln = ARP_HLEN;
arp->ar_pln = ARP_PLEN;
arp->ar_op = htons(ARPOP_REQUEST);
memcpy(&arp->ar_sha, NetOurEther, ARP_HLEN); /* source ET addr */
NetWriteIP(&arp->ar_spa, sourceIP); /* source IP addr */
memcpy(&arp->ar_tha, targetEther, ARP_HLEN); /* target ET addr */
NetWriteIP(&arp->ar_tpa, targetIP); /* target IP addr */
NetSendPacket(NetArpTxPacket, eth_hdr_size + ARP_HDR_SIZE);
}
int NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport,
int payload_len)
{
uchar *pkt;
int eth_hdr_size;
int pkt_hdr_size;
/* make sure the NetTxPacket is initialized (NetInit() was called) */
assert(NetTxPacket != NULL);
if (NetTxPacket == NULL)
return -1;
/* convert to new style broadcast */
if (dest == 0)
dest = 0xFFFFFFFF;
/* if broadcast, make the ether address a broadcast and don't do ARP */
if (dest == 0xFFFFFFFF)
ether = NetBcastAddr;
pkt = (uchar *)NetTxPacket;
eth_hdr_size = NetSetEther(pkt, ether, PROT_IP);
pkt += eth_hdr_size;
net_set_udp_header(pkt, dest, dport, sport, payload_len);
pkt_hdr_size = eth_hdr_size + IP_UDP_HDR_SIZE;
/* if MAC address was not discovered yet, do an ARP request */
if (memcmp(ether, NetEtherNullAddr, 6) == 0) {
debug_cond(DEBUG_DEV_PKT, "sending ARP for %pI4\n", &dest);
/* save the ip and eth addr for the packet to send after arp */
NetArpWaitPacketIP = dest;
NetArpWaitPacketMAC = ether;
/* size of the waiting packet */
NetArpWaitTxPacketSize = pkt_hdr_size + payload_len;
/* and do the ARP request */
NetArpWaitTry = 1;
NetArpWaitTimerStart = get_timer(0);
ArpRequest();
return 1; /* waiting */
} else {
debug_cond(DEBUG_DEV_PKT, "sending UDP to %pI4/%pM\n",
&dest, ether);
NetSendPacket(NetTxPacket, pkt_hdr_size + payload_len);
return 0; /* transmitted */
}
}
if (BootpTry <= 2) /* Start with max 1024 * 1ms */
rand_ms = rand() >> (22 - BootpTry);
else /* After 3rd BOOTP request max 8192 * 1ms */
rand_ms = rand() >> 19;
printf("Random delay: %ld ms...\n", rand_ms);
mdelay(rand_ms);
#endif /* CONFIG_BOOTP_RANDOM_DELAY */
printf("BOOTP broadcast %d\n", ++BootpTry);
pkt = NetTxPacket;
memset((void *)pkt, 0, PKTSIZE);
eth_hdr_size = NetSetEther(pkt, NetBcastAddr, PROT_IP);
pkt += eth_hdr_size;
/*
* Next line results in incorrect packet size being transmitted,
* resulting in errors in some DHCP servers, reporting missing bytes.
* Size must be set in packet header after extension length has been
* determined.
* C. Hallinan, DS4.COM, Inc.
*/
/* net_set_udp_header(pkt, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC,
sizeof (struct Bootp_t)); */
iphdr = pkt; /* We need this later for net_set_udp_header() */
pkt += IP_UDP_HDR_SIZE;
bp = (struct Bootp_t *)pkt;
