--- /dev/null
+/*
+ * Palacios Raw Packet
+ * (c) Lei Xia, 2010
+ */
+#include <asm/uaccess.h>
+#include <linux/inet.h>
+#include <linux/kthread.h>
+#include <linux/netdevice.h>
+#include <linux/ip.h>
+#include <linux/in.h>
+#include <linux/string.h>
+#include <linux/preempt.h>
+#include <linux/sched.h>
+#include <linux/if_packet.h>
+#include <linux/errno.h>
+#include <asm/msr.h>
+
+#include <interfaces/vmm_packet.h>
+#include <palacios/vmm_host_events.h>
+#include <vnet/vnet.h>
+
+
+#define __V3VEE__
+#include <palacios/vmm_hashtable.h>
+#include <palacios/vmm_ethernet.h>
+#undef __V3VEE__
+
+#include "palacios.h"
+#include "linux-exts.h"
+
+struct palacios_packet_state {
+ struct socket * raw_sock;
+ uint8_t inited;
+
+ struct hashtable * mac_vm_cache;
+ struct task_struct * server_thread;
+};
+
+static struct palacios_packet_state packet_state;
+
+static inline uint_t hash_fn(addr_t hdr_ptr) {
+ uint8_t * hdr_buf = (uint8_t *)hdr_ptr;
+
+ return v3_hash_buffer(hdr_buf, ETH_ALEN);
+}
+
+static inline int hash_eq(addr_t key1, addr_t key2) {
+ return (memcmp((uint8_t *)key1, (uint8_t *)key2, ETH_ALEN) == 0);
+}
+
+
+static int palacios_packet_add_recver(const char * mac,
+ struct v3_vm_info * vm){
+ char * key;
+
+ key = (char *)kmalloc(ETH_ALEN, GFP_KERNEL);
+ memcpy(key, mac, ETH_ALEN);
+
+ if (v3_htable_insert(packet_state.mac_vm_cache, (addr_t)key, (addr_t)vm) == 0) {
+ printk("Palacios Packet: Failed to insert new mac entry to the hash table\n");
+ return -1;
+ }
+
+ printk("Packet: Add MAC: %2x:%2x:%2x:%2x:%2x:%2x\n", mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
+
+ return 0;
+}
+
+static int palacios_packet_del_recver(const char * mac,
+ struct v3_vm_info * vm){
+
+ return 0;
+}
+
+static int init_raw_socket(const char * eth_dev){
+ int err;
+ struct sockaddr_ll sock_addr;
+ struct ifreq if_req;
+ int dev_idx;
+
+ err = sock_create(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL), &(packet_state.raw_sock));
+
+ if (err < 0) {
+ printk(KERN_WARNING "Could not create a PF_PACKET Socket, err %d\n", err);
+ return -1;
+ }
+
+ if (eth_dev == NULL){
+ eth_dev = "eth0"; /* default "eth0" */
+ }
+
+ memset(&if_req, 0, sizeof(if_req));
+ strncpy(if_req.ifr_name, eth_dev, IFNAMSIZ); //sizeof(if_req.ifr_name));
+
+ err = packet_state.raw_sock->ops->ioctl(packet_state.raw_sock, SIOCGIFINDEX, (long)&if_req);
+
+ if (err < 0){
+ printk(KERN_WARNING "Palacios Packet: Unable to get index for device %s, error %d\n",
+ if_req.ifr_name, err);
+ dev_idx = 2; /* match ALL 2:"eth0" */
+ } else {
+ dev_idx = if_req.ifr_ifindex;
+ }
+
+ printk(KERN_INFO "Palacios Packet: bind to device index: %d\n", dev_idx);
+
+ memset(&sock_addr, 0, sizeof(sock_addr));
+ sock_addr.sll_family = PF_PACKET;
+ sock_addr.sll_protocol = htons(ETH_P_ALL);
+ sock_addr.sll_ifindex = dev_idx;
+
+ err = packet_state.raw_sock->ops->bind(packet_state.raw_sock,
+ (struct sockaddr *)&sock_addr,
+ sizeof(sock_addr));
+
+ if (err < 0){
+ printk(KERN_WARNING "Error binding raw packet to device %s, %d\n", eth_dev, err);
+ return -1;
+ }
+
+ printk(KERN_INFO "Bind palacios raw packet interface to device %s\n", eth_dev);
+
+ return 0;
+}
+
+
+static int
+palacios_packet_send(const char * pkt, unsigned int len, void * private_data) {
+ struct msghdr msg;
+ struct iovec iov;
+ mm_segment_t oldfs;
+ int size = 0;
+
+ iov.iov_base = (void *)pkt;
+ iov.iov_len = (__kernel_size_t)len;
+
+ msg.msg_iov = &iov;
+ msg.msg_iovlen = 1;
+ msg.msg_control = NULL;
+ msg.msg_controllen = 0;
+ msg.msg_name = NULL;
+ msg.msg_namelen = 0;
+ msg.msg_flags = 0;
+
+ oldfs = get_fs();
+ set_fs(KERNEL_DS);
+ size = sock_sendmsg(packet_state.raw_sock, &msg, len);
+ set_fs(oldfs);
+
+
+ return size;
+}
+
+
+static struct v3_packet_hooks palacios_packet_hooks = {
+ .send = palacios_packet_send,
+ .add_recver = palacios_packet_add_recver,
+ .del_recver = palacios_packet_del_recver,
+};
+
+
+static int
+recv_pkt(char * pkt, int len) {
+ struct msghdr msg;
+ struct iovec iov;
+ mm_segment_t oldfs;
+ int size = 0;
+
+ if (packet_state.raw_sock == NULL) {
+ return -1;
+ }
+
+ iov.iov_base = pkt;
+ iov.iov_len = len;
+
+ msg.msg_flags = 0;
+ msg.msg_name = NULL;
+ msg.msg_namelen = 0;
+ msg.msg_control = NULL;
+ msg.msg_controllen = 0;
+ msg.msg_iov = &iov;
+ msg.msg_iovlen = 1;
+ msg.msg_control = NULL;
+
+ oldfs = get_fs();
+ set_fs(KERNEL_DS);
+ size = sock_recvmsg(packet_state.raw_sock, &msg, len, msg.msg_flags);
+ set_fs(oldfs);
+
+ return size;
+}
+
+
+static void
+send_raw_packet_to_palacios(char * pkt,
+ int len,
+ struct v3_vm_info * vm) {
+ struct v3_packet_event event;
+ char data[ETHERNET_PACKET_LEN];
+
+ /* one memory copy */
+ memcpy(data, pkt, len);
+ event.pkt = data;
+ event.size = len;
+
+ v3_deliver_packet_event(vm, &event);
+}
+
+static int packet_server(void * arg) {
+ char pkt[ETHERNET_PACKET_LEN];
+ int size;
+ struct v3_vm_info *vm;
+
+ printk("Palacios Raw Packet Bridge: Staring receiving server\n");
+
+ while (!kthread_should_stop()) {
+ size = recv_pkt(pkt, ETHERNET_PACKET_LEN);
+
+ if (size < 0) {
+ printk(KERN_WARNING "Palacios raw packet receive error, Server terminated\n");
+ break;
+ }
+
+
+ /* if VNET is enabled, send to VNET */
+ // ...
+
+
+ /* if it is broadcast or multicase packet */
+ // ...
+
+
+ vm = (struct v3_vm_info *)v3_htable_search(packet_state.mac_vm_cache, (addr_t)pkt);
+
+ if (vm != NULL){
+ printk("Find destinated VM 0x%p\n", vm);
+ send_raw_packet_to_palacios(pkt, size, vm);
+ }
+ }
+
+ return 0;
+}
+
+
+static int packet_init( void ) {
+
+ const char * eth_dev = NULL;
+
+ if (packet_state.inited == 0){
+ packet_state.inited = 1;
+
+ if (init_raw_socket(eth_dev) == -1){
+ printk("Error to initiate palacios packet interface\n");
+ return -1;
+ }
+
+ V3_Init_Packet(&palacios_packet_hooks);
+
+ packet_state.mac_vm_cache = v3_create_htable(0, &hash_fn, &hash_eq);
+
+ packet_state.server_thread = kthread_run(packet_server, NULL, "raw-packet-server");
+ }
+
+
+ // REGISTER GLOBAL CONTROL to add interfaces...
+
+ return 0;
+}
+
+static int packet_deinit( void ) {
+
+
+ kthread_stop(packet_state.server_thread);
+ packet_state.raw_sock->ops->release(packet_state.raw_sock);
+ v3_free_htable(packet_state.mac_vm_cache, 0, 1);
+ packet_state.inited = 0;
+
+ return 0;
+}
+
+
+
+static struct linux_ext pkt_ext = {
+ .name = "PACKET_INTERFACE",
+ .init = packet_init,
+ .deinit = packet_deinit,
+ .guest_init = NULL,
+ .guest_deinit = NULL
+};
+
+
+register_extension(&pkt_ext);