/*------------------------------------------------------------------------
* udp_in - handle an incoming UDP packet
*------------------------------------------------------------------------
*/
void udp_in(void) { /* currpkt points to the packet */
intmask mask; /* saved interrupt mask */
int32 i; /* index into udptab */
struct udpentry *udptr; /* pointer to udptab entry */
/* Insure only one process can access the UDP table at a time */
mask = disable();
/* Convert IP and UDP header fields to host byte order */
udp_ntoh(currpkt);
for (i=0; i<UDP_SLOTS; i++) {
udptr = &udptab[i];
if ( (udptr->udstate != UDP_FREE) &&
(currpkt->net_udpdport == udptr->udlocport) &&
((udptr->udremport == 0) ||
(currpkt->net_udpsport == udptr->udremport)) &&
( ((udptr->udremip==0) ||
(currpkt->net_ipsrc == udptr->udremip))) ) {
/* Entry matches incoming packet */
if (udptr->udcount < UDP_QSIZ) {
udptr->udcount++;
udptr->udqueue[udptr->udtail++] = currpkt;
if (udptr->udtail >= UDP_QSIZ) {
udptr->udtail = 0;
}
currpkt = (struct netpacket *)getbuf(netbufpool);
if (udptr->udstate == UDP_RECV) {
udptr->udstate = UDP_USED;
send (udptr->udpid, OK);
}
restore(mask);
return;
}
}
}
/* No match - simply discard packet */
restore(mask);
return;
}
/*------------------------------------------------------------------------
* udp_in - handle an incoming UDP packet
*------------------------------------------------------------------------
*/
void udp_in(void) { /* currpkt points to the packet */
intmask mask; /* saved interrupt mask */
int32 i; /* index into udptab */
struct udpentry *udptr; /* pointer to udptab entry */
struct ipv4_packet *ippkt = (struct ipv4_packet *)(currpkt->net_ethdata);
struct udp_packet * udppkt = (struct udp_packet *)(ippkt->net_ipdata);
/* Insure only one process can access the UDP table at a time */
mask = disable();
//kprintf("Inside udp_in\r\n");
/* Convert IP and UDP header fields to host byte order */
udp_ntoh(udppkt);
/*
if (ippkt->net_ipproto == IP_UDP) {
kprintf("proto UDP (%d), length %d",
ippkt->net_ipproto, ntohs(ippkt->net_iplen));
kprintf(")\n");
kprintf("\t%d.%d.%d.%d > ",
((ippkt->net_ipsrc)>>24)&0xff,
((ippkt->net_ipsrc)>>16)&0xff,
((ippkt->net_ipsrc)>>8)&0xff,
((ippkt->net_ipsrc)&0xff));
kprintf("%d.%d.%d.%d: ",
((ippkt->net_ipdst)>>24)&0xff,
((ippkt->net_ipdst)>>16)&0xff,
((ippkt->net_ipdst)>>8)&0xff,
((ippkt->net_ipdst)&0xff));
//kprintf("PDUMP Check 9\r\n");
kprintf("[udp checksum none] ");
kprintf("UDP, src port %d, dst port %d, length %d\n",
(udppkt->net_udpsport),
(udppkt->net_udpdport),
(udppkt->net_udplen) - UDP_HDR_LEN);
}
*/
for (i=0; i<UDP_SLOTS; i++) {
udptr = &udptab[i];
if ( (udptr->udstate != UDP_FREE) &&
(udppkt->net_udpdport == udptr->udlocport) &&
((udptr->udremport == 0) ||
(udppkt->net_udpsport == udptr->udremport)) &&
( ((udptr->udremip==0) ||
(ippkt->net_ipsrc == udptr->udremip))) ) {
/* Entry matches incoming packet */
if (udptr->udcount < UDP_QSIZ) {
udptr->udcount++;
udptr->udqueue[udptr->udtail++] = (struct eth_packet *)currpkt;
if (udptr->udtail >= UDP_QSIZ) {
udptr->udtail = 0;
}
currpkt = (struct eth_packet *)getbuf(netbufpool);
if (udptr->udstate == UDP_RECV) {
udptr->udstate = UDP_USED;
send (udptr->udpid, OK);
}
restore(mask);
return;
}
}
}
/* No match - simply discard packet */
//kprintf("Done with udp_in\r\n");
restore(mask);
return;
}
