process netin (
int32 iface /* Interface for this process */
)
{
struct ifentry *ifptr; /* ptr to interface table entry */
struct netpacket *pkt; /* ptr to current packet */
/* Do forever: read packets from the network and process */
ifptr = &if_tab[iface];
while(1) {
/* Obtain next packet arriving on an interface */
wait(ifptr->if_sem);
pkt = ifptr->if_queue[ifptr->if_head++];
if (ifptr->if_head >= IF_QUEUESIZE) {
ifptr->if_head = 0;
}
/* Store interface number in packet buffer */
pkt->net_iface = iface;
/* Convert Ethernet Type to host order */
eth_ntoh(pkt);
/* Demultiplex on Ethernet type */
switch (pkt->net_ethtype) {
case ETH_ARP: /* Handle ARP */
arp_in(iface,(struct arppacket *)pkt);
continue;
case ETH_IP: /* Handle IP */
ip_in(pkt);
continue;
case ETH_IPv6: /* Handle IPv6 */
freebuf((char *)pkt);
continue;
default: /* Ignore all other incoming packets */
freebuf((char *)pkt);
continue;
}
}
}
process netin ()
{
struct netpacket *pkt; /* Ptr to current packet */
int32 retval; /* Return value from read */
/* Do forever: read a packet from the network and process */
while(1) {
/* Allocate a buffer */
pkt = (struct netpacket *)getbuf(netbufpool);
/* Obtain next packet that arrives */
retval = read(ETHER0, (char *)pkt, PACKLEN);
if(retval == SYSERR) {
panic("Cannot read from Ethernet\n");
}
/* Convert Ethernet Type to host order */
eth_ntoh(pkt);
/* Demultiplex on Ethernet type */
switch (pkt->net_ethtype) {
case ETH_ARP: /* Handle ARP */
arp_in((struct arppacket *)pkt);
continue;
case ETH_IP: /* Handle IP */
ip_in(pkt);
continue;
case ETH_IPv6: /* Handle IPv6 */
freebuf((char *)pkt);
continue;
default: /* Ignore all other incoming packets */
freebuf((char *)pkt);
continue;
}
}
}
static void
ether_in(struct lcore_env *env, struct rte_mbuf** bufs,
unsigned n_rx, uint8_t src_port)
{
uint32_t j;
for(j = 0; j < n_rx; j++) {
int res = 0;
int eth_type;
struct rte_mbuf* pkt = bufs[j];
rte_prefetch0(rte_pktmbuf_mtod(pkt, void *));
struct ether_hdr *eth = rte_pktmbuf_mtod(pkt, struct ether_hdr *);
eth_type = ntohs(eth->ether_type);
//RTE_LOG(INFO, MARIO, "%s\n\tl2_len: %d\n\tl3_len:%d\n\tl4_len:%d\n",
// __func__, pkt->l2_len, pkt->l3_len, pkt->l4_len);
pkt->l2_len = ETHER_HDR_LEN;
printf("eth_hdr_type : %x\n", eth->ether_type);
printf("eth_type_arp : %x\n", ETHER_TYPE_ARP);
switch (eth_type) {
case ETHER_TYPE_ARP : {
printf("arp recved\n");
print_eth(eth);
res = arp_in(pkt);
break;
}
case ETHER_TYPE_IPv4 : {
printf("ip recved\n");
res = ip_in(pkt, src_port); //return value : port
break;
}
case ETHER_TYPE_IPv6 : {
;
break;
}
}
// no need to send a packet. e.g. after receiving an arp_reply
if(res < -1) continue;
printf("send_packet\n");
send_packet(env, pkt, (res == -1) ? src_port : res);
}
}
int
ether_in(struct rte_mbuf *mbuf)
{
struct ether_hdr *eth;
eth = rte_pktmbuf_mtod(mbuf, struct ether_hdr *);
switch(ntohs(eth->ether_type)) {
case ETHER_TYPE_ARP :
logger(ARP, NORMAL, "seen arp packet\n");
//printf("arp packet\n");
arp_in(mbuf);
break;
case ETHER_TYPE_IPv4 :
logger(IP, NORMAL, "seen ip packet\n");
//printf("IP packet\n");
ip_in(mbuf);
break;
default :
rte_pktmbuf_free(mbuf);
}
rte_pktmbuf_free(mbuf); // don't free here, future work.
}