int net_send_udp_packet(uchar *ether, struct in_addr dest, int dport, int sport,
int payload_len)
{
uchar *pkt;
int eth_hdr_size;
int pkt_hdr_size;
/* make sure the net_tx_packet is initialized (net_init() was called) */
assert(net_tx_packet != NULL);
if (net_tx_packet == NULL)
return -1;
/* convert to new style broadcast */
if (dest.s_addr == 0)
dest.s_addr = 0xFFFFFFFF;
/* if broadcast, make the ether address a broadcast and don't do ARP */
if (dest.s_addr == 0xFFFFFFFF)
ether = (uchar *)net_bcast_ethaddr;
pkt = (uchar *)net_tx_packet;
eth_hdr_size = net_set_ether(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, net_null_ethaddr, 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 */
net_arp_wait_packet_ip = dest;
arp_wait_packet_ethaddr = ether;
/* size of the waiting packet */
arp_wait_tx_packet_size = pkt_hdr_size + payload_len;
/* and do the ARP request */
arp_wait_try = 1;
arp_wait_timer_start = get_timer(0);
arp_request();
return 1; /* waiting */
} else {
debug_cond(DEBUG_DEV_PKT, "sending UDP to %pI4/%pM\n",
&dest, ether);
net_send_packet(net_tx_packet, pkt_hdr_size + payload_len);
return 0; /* transmitted */
}
}
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 */
}
}
