struct ethernet_pkt {
- uint32_t size;
+ uint32_t size; //size of data
uint16_t type;
+ struct udp_link_header ext_hdr; //possible externel header to applied to data before sent
char data[ETHERNET_PACKET_LEN];
};
struct in_pkt_header {
char ethernetdest[6];
char ethernetsrc[6];
- unsigned char ethernettype[2]; // indicates layer 3 protocol type
+ unsigned char ethernettype[2]; //layer 3 protocol type
char ip[20];
};
static struct hashtable * g_route_cache;
-static void print_packet(char * pkt, int size) {
+static void print_packet(uchar_t *pkt, int size) {
PrintDebug("Vnet: print_data_packet: size: %d\n", size);
v3_hexdump(pkt, size, NULL, 0);
}
}
#endif
+static uint16_t ip_xsum(struct ip_header *ip_hdr, int hdr_len){
+ long sum = 0;
-// network connection functions
-static inline void ethernet_packet_init(struct ethernet_pkt * pt, const char * data, const size_t size) {
+ uint16_t *p = (uint16_t*) ip_hdr;
+ while(hdr_len > 1){
+ sum += *(p++);
+ if(sum & 0x80000000)
+ sum = (sum & 0xFFFF) + (sum >> 16);
+ hdr_len -= 2;
+ }
+
+ if(hdr_len)
+ sum += (uint16_t) *(uchar_t *)p;
+
+ while(sum>>16)
+ sum = (sum & 0xFFFF) + (sum >> 16);
+
+ return (uint16_t)~sum;
+}
+
+static inline void ethernet_packet_init(struct ethernet_pkt *pt, uchar_t *data, const size_t size) {
pt->size = size;
memcpy(pt->data, data, size);
}
return n_matches;
}
+#ifdef CONFIG_DEBUG_VNET
static inline uint8_t hex_nybble_to_nybble(const uint8_t hexnybble) {
uint8_t x = toupper(hexnybble);
mac[0], mac[1], mac[2],
mac[3], mac[4], mac[5]);
}
+#endif
-static int add_link_entry(struct link_entry * link) {
+static int __add_link_entry(struct link_entry * link) {
int idx;
for (idx = 0; idx < MAX_LINKS; idx++) {
return -1;
}
-static int add_route_entry(struct routing_entry * route) {
+static int __add_route_entry(struct routing_entry * route) {
int idx;
for (idx = 0; idx < MAX_ROUTES; idx++) {
new_route->src_link_idx = src;
new_route->src_type = src_type;
- if ((idx = add_route_entry(new_route)) == -1) {
+ if ((idx = __add_route_entry(new_route)) == -1) {
PrintError("Could not add route entry\n");
return -1;
}
return idx;
}
-static void * delete_link_entry(int index) {
+static void * __delete_link_entry(int index) {
struct link_entry * link = NULL;
void * ret = NULL;
link_type_t type;
return -1;
}
-static int delete_route_entry(int index) {
+static int __delete_route_entry(int index) {
struct routing_entry * route;
if ((index >= MAX_ROUTES) || (g_routes.routes[index] == NULL)) {
- PrintError("Could not find route entry %d\n", index);
+ PrintDebug("VNET: wrong index in delete route entry %d\n", index);
return -1;
}
dest_mac_qual, link_idx, type, src, src_type);
if (index == -1) {
- PrintError("Error deleting route entry by addr\n");
+ PrintDebug("VNET: wrong in delete route entry %d\n", index);
return -1;
}
- return delete_route_entry(index);
+ return __delete_route_entry(index);
}
static int match_route(uint8_t * src_mac,
return no;
}
-#if 0
-// TODO: To be removed
-static int process_udpdata()
-{
- struct ethernet_pkt * pt;
-
- uint32_t dest = 0;
- uint16_t remote_port = 0;
- SOCK link_sock = g_udp_sockfd;
- int length = sizeof(struct ethernet_pkt) - (2 * sizeof(int)); //minus the "size" and "type"
-
- //run in a loop to get packets from outside network, adding them to the incoming packet queue
- while (1) {
- pt = (struct ethernet_pkt *)V3_Malloc(sizeof(struct ethernet_pkt));
-
- if (pt == NULL){
- PrintError("Vnet: process_udp: Malloc fails\n");
- continue;
- }
-
- PrintDebug("Vnet: route_thread: socket: [%d]. ready to receive from ip [%x], port [%d] or from VMs\n", link_sock, (uint_t)dest, remote_port);
- pt->size = V3_RecvFrom_IP( link_sock, dest, remote_port, pt->data, length);
- PrintDebug("Vnet: route_thread: socket: [%d] receive from ip [%x], port [%d]\n", link_sock, (uint_t)dest, remote_port);
-
- if (pt->size <= 0) {
- PrintDebug("Vnet: process_udp: receiving packet from UDP fails\n");
- V3_Free(pt);
- return -1;
- }
-
- PrintDebug("Vnet: process_udp: get packet\n");
- print_packet(pt->data, pt->size);
- }
-}
-
-// TODO: To be removed
-static int indata_handler( )
-{
- if (!use_tcp) {
- process_udpdata();
- }
-
- return 0;
-}
-
-// TODO: To be removed
-static int start_recv_data()
-{
- if (use_tcp){
-
- } else {
- SOCK udp_data_socket;
-
- if ((udp_data_socket = V3_Create_UDP_Socket()) < 0){
- PrintError("VNET: Can't setup udp socket\n");
- return -1;
- }
- PrintDebug("Vnet: vnet_setup_udp: get socket: %d\n", udp_data_socket);
- g_udp_sockfd = udp_data_socket;
-
- store_topologies(udp_data_socket);
-
- if (V3_Bind_Socket(udp_data_socket, vnet_udp_port) < 0){
- PrintError("VNET: Can't bind socket\n");
- return -1;
- }
- PrintDebug("VNET: vnet_setup_udp: bind socket successful\n");
- }
-
- V3_CREATE_THREAD(&indata_handler, NULL, "VNET_DATA_HANDLER");
- return 0;
-}
-
-static void store_test_topologies(SOCK fd)
-{
- int i;
- int src_mac_qual = MAC_ANY;
- int dest_mac_qual = MAC_ANY;
- uint_t dest;
-#ifndef VNET_SERVER
- dest = (0 | 172 << 24 | 23 << 16 | 1 );
- PrintDebug("VNET: store_topologies. NOT VNET_SERVER, dest = %x\n", dest);
-#else
- dest = (0 | 172 << 24 | 23 << 16 | 2 );
- PrintDebug("VNET: store_topologies. VNET_SERVER, dest = %x\n", dest);
-#endif
-
- int type = UDP_TYPE;
- int src = 0;
- int src_type= LINK_ANY; //ANY_SRC_TYPE
- int data_port = 22;
-}
-
-#endif
-
-static int handle_one_pkt(struct ethernet_pkt * pkt) {
+static int handle_one_pkt(struct ethernet_pkt *pkt) {
int src_link_index = -1; //the value of src_link_index of udp always is 0
int i;
char src_mac[6];
num_matched_routes = look_into_cache((route_hashkey_t)hash_key, matches);
-
if (num_matched_routes == -1) {
- // no match
-
+ // no match in the cache
num_matched_routes = match_route(src_mac, dst_mac, LINK_ANY, src_link_index, matches);
- if (num_matched_routes > 0) {
- add_route_to_cache(hash_key, num_matched_routes,matches);
- }
+ if (num_matched_routes > 0) {
+ add_route_to_cache(hash_key, num_matched_routes,matches);
+ }
}
PrintDebug("Vnet: HandleDataOverLink: Matches=%d\n", num_matched_routes);
- for (i = 0; i < num_matched_routes; i++) {
+ for (i = 0; i < num_matched_routes; i++) {//send packet to all destinations
int route_index = -1;
int link_index = -1;
- int pkt_len = 0;
- struct link_entry * link = NULL;
+ int pkt_len = 0;
+ struct link_entry * link = NULL;
route_index = matches[i];
PrintDebug("Vnet: HandleDataOverLink: Forward packet from link according to Route entry %d\n", route_index);
- link_index = g_routes.routes[route_index]->link_idx;
+ link_index = g_routes.routes[route_index]->link_idx;
- if ( (link_index < 0) ||
+ if ((link_index < 0) ||
(link_index > MAX_LINKS) ||
(g_links.links[link_index] == NULL)) {
- continue;
- }
-
- link = g_links.links[link_index];
-
+ continue;
+ }
- pkt_len = pkt->size;
-
+ link = g_links.links[link_index];
+ pkt_len = pkt->size;
if (g_routes.routes[route_index]->link_type == LINK_EDGE) {
-
- // TODO: apply the header in the beginning of the packet to be sent
- if ((link->dst_link->input(pkt->data, pkt_len, NULL)) != pkt_len) {
- PrintError("LEI -- WHAT IS THE ERROR HERE?\n");
- return -1;
- }
+
+ //apply the header in the beginning of the packet to be sent
+ if (link->dst_link->pro_type == UDP_TYPE) {
+ struct udp_link_header *hdr = &(link->dst_link->vnet_header);
+ struct ip_header *ip = &hdr->ip_hdr;
+ struct udp_header *udp = &hdr->udp_hdr;
+ udp->len = pkt_len + sizeof(struct udp_header);
+ ip->total_len = pkt_len + sizeof(struct udp_header) + sizeof(struct ip_header);
+ ip->cksum = ip_xsum(ip, sizeof(struct ip_header));
+
+ int hdr_size = sizeof(struct udp_link_header);
+ memcpy(&pkt->ext_hdr, hdr, hdr_size);
+
+ pkt_len += hdr_size;
+ if ((link->dst_link->input((uchar_t *)&pkt->ext_hdr, pkt_len, link->dst_link->private_data)) != pkt_len) {
+ PrintDebug("VNET: Packet not sent properly\n");
+ return -1;
+ }
+ }else {
+ PrintDebug("VNET: Link protocol type not support\n");
+ return -1;
+ }
} else if (g_routes.routes[route_index]->link_type == LINK_INTERFACE) {
- if ((link->dst_link->input(pkt->data, pkt_len, NULL)) != pkt_len) {
- PrintError("LEI -- WHAT IS THE ERROR HERE?\n");
- return -1;
- }
+ if ((link->dst_dev->input(pkt->data, pkt_len, link->dst_dev->private_data)) != pkt_len) {
+ PrintDebug("VNET: Packet not sent properly\n");
+ return -1;
+ }
} else {
- PrintError("Vnet: Wrong Edge type\n");
- return -1;
+ PrintDebug("Vnet: Wrong Edge type\n");
+ return -1;
}
}
return 0;
}
-static int send_ethernet_pkt(char * buf, int length) {
- struct ethernet_pkt * pkt;
+static int send_ethernet_pkt(uchar_t *data, int len) {
+ struct ethernet_pkt *pkt;
pkt = (struct ethernet_pkt *)V3_Malloc(sizeof(struct ethernet_pkt));
- ethernet_packet_init(pkt, buf, length); //====here we copy sending data once
+ memset(pkt, 0, sizeof(struct ethernet_pkt));
+
+ if(pkt == NULL){
+ PrintError("VNET: Memory allocate fails\n");
+ return -1;
+ }
+
+ ethernet_packet_init(pkt, data, len); //====here we copy sending data once
PrintDebug("VNET: vm_send_pkt: transmitting packet: (size:%d)\n", (int)pkt->size);
- print_packet((char *)buf, length);
+ print_packet((char *)data, len);
v3_enqueue(g_inpkt_q, (addr_t)pkt);
return 0;
}
-int v3_vnet_send_pkt(uchar_t * buf, int length) {
- PrintDebug("VNET: In V3_Send_pkt: pkt length %d\n", length);
+//send raw ethernet packet
+int v3_vnet_send_rawpkt(uchar_t * buf, int len, void *private_data) {
+ PrintDebug("VNET: In V3_Send_pkt: pkt length %d\n", len);
- return send_ethernet_pkt((char *)buf, length);
+ return send_ethernet_pkt(buf, len);
+}
+
+//sending the packet from Dom0, should remove the link header
+int v3_vnet_send_udppkt(uchar_t * buf, int len, void *private_data) {
+ PrintDebug("VNET: In V3_Send_pkt: pkt length %d\n", len);
+
+ uint_t hdr_len = sizeof(struct udp_link_header);
+
+ return send_ethernet_pkt((uchar_t *)(buf+hdr_len), len - hdr_len);
}
static int search_device(char * device_name) {
}
}
}
-
- PrintError("LEI -- WHAT IS THE ERROR HERE?\n");
+
return -1;
}
-static int vnet_register_device(struct vm_device * vdev,
+int vnet_register_device(struct vm_device * vdev,
char * dev_name,
uchar_t mac[6],
int (*netif_input)(uchar_t * pkt, uint_t size, void * private_data),
int idx = search_device(dev_name);
if (idx != -1) {
- PrintError("LEI -- WHAT IS THE ERROR HERE?\n");
+ PrintDebug("VNET: register device: Already has device with the name %s\n", dev_name);
return -1;
}
- if_dev = (struct vnet_if_device *)V3_Malloc(sizeof(struct vnet_if_device));
+ if_dev = (struct vnet_if_device *)(sizeof(struct vnet_if_device));
if (if_dev == NULL) {
PrintError("VNET: Malloc fails\n");
if_dev->input = netif_input;
if_dev->private_data = data;
- struct link_entry * link = (struct link_entry *)V3_Malloc(sizeof(struct link_entry));
+ struct link_entry * link = (struct link_entry *)(sizeof(struct link_entry));
link->type = LINK_INTERFACE;
link->dst_dev = if_dev;
- idx = add_link_entry(link);
+ idx = __add_link_entry(link);
+
+ PrintDebug("VNET: Add device %s to link table, idx %d", dev_name, idx);
return idx;
}
+#if 0
static int vnet_unregister_device(char * dev_name) {
int idx;
idx = search_device(dev_name);
if (idx == -1) {
- PrintError("LEI -- WHAT IS THE ERROR HERE?\n");
+ PrintDebug("VNET: No device with name %s found\n", dev_name);
return -1;
}
- struct vnet_if_device * device = (struct vnet_if_device *)delete_link_entry(idx);
+ struct vnet_if_device * device = (struct vnet_if_device *)__delete_link_entry(idx);
if (device == NULL) {
- PrintError("LEI -- WHAT IS THE ERROR HERE?\n");
+ PrintError("VNET: Device %s not in the link table %d, something may be wrong in link table\n", dev_name, idx);
return -1;
}
return idx;
}
+#endif
+
int v3_vnet_pkt_process() {
struct ethernet_pkt * pkt;
v3_init_queue(g_inpkt_q);
}
-#if 0
-// TODO:
-static int init_routing_tables(struct routing_entry *route_tab, uint16_t size)
-{
- //struct routing_entry *route;
+static void free_link_mem(struct link_entry *link){
+ V3_Free(link->dst_dev);
+ V3_Free(link);
+}
+// TODO:
+static int addto_routing_link_tables(struct routing_entry *route_tab,
+ uint16_t num_routes,
+ struct link_entry *link_tab,
+ uint16_t num_links){
+ struct routing_entry *route, *new_route;
+ struct link_entry *link, *new_link;
+ int new_idx;
+ int i;
+ int link_idxs[MAX_LINKS];
- return 0;
-}
+ //add all of the links first, record their new indexs
+ for (i = 0; i < num_links; i++) {
+ link_idxs[i] = -1;
+ link = &link_tab[i];
+ new_link = (struct link_entry *)V3_Malloc(sizeof(struct link_entry));
+ if (new_link == NULL){
+ PrintError("VNET: Memory allocate error\n");
+ return -1;
+ }
+
+ new_link->type = link->type;
+
+ //TODO: how to set the input parameters here
+ if (link->type == LINK_EDGE){
+ struct vnet_if_device *ifdev = (struct vnet_if_device *)V3_Malloc(sizeof(struct vnet_if_device));
+
+ if (ifdev == NULL){
+ PrintError("VNET: Memory allocate fails\n");
+ return -1;
+ }
+
+ memcpy(ifdev->name, link->dst_dev->name, DEVICE_NAME_LEN);
+
+ // TODO:
+ //ifdev->mac_addr
+ //ifdev->input
+ //ifdev->private_data
+
+ new_link->dst_dev = ifdev;
+ }else if (link->type == LINK_INTERFACE){
+ struct vnet_if_link *iflink = (struct vnet_if_link *)V3_Malloc(sizeof(struct vnet_if_link));
+
+ if (iflink == NULL){
+ PrintError("VNET: Memory allocate fails\n");
+ return -1;
+ }
+ iflink->pro_type = link->dst_link->pro_type;
+ iflink->dest_ip = link->dst_link->dest_ip;
+ iflink->dest_port = link->dst_link->dest_port;
+ memcpy(&iflink->vnet_header, &link->dst_link->vnet_header, sizeof(struct udp_link_header));
+
+ // TODO:
+ //iflink->input =
+ //iflink->private_data =
+
+ new_link->dst_link = iflink;
+ }else{
+ PrintDebug("VNET: invalid link type\n");
+ V3_Free(new_link);
+ continue;
+ }
+
+ new_idx = __add_link_entry(new_link);
+ if (new_idx < 0) {
+ PrintError("VNET: Adding link fails\n");
+ free_link_mem(new_link);
+ continue;
+ }
+ link_idxs[i] = new_idx;
+ }
+
+ //add all of routes, replace with new link indexs
+ for (i = 0; i < num_routes; i++) {
+ route = &route_tab[i];
+ if (route->link_idx < 0 || route->link_idx >= num_links ||
+ ((route->src_link_idx != -1) &&
+ (route->src_link_idx < 0 || route->src_link_idx >= num_links))){
+ PrintError("VNET: There is error in the intial tables data from guest\n");
+ continue;
+ }
+
+ new_route = (struct routing_entry *)V3_Malloc(sizeof(struct routing_entry));
+
+ if (new_route == NULL){
+ PrintError("VNET: Memory allocate fails\n");
+ return -1;
+ }
+ memcpy(new_route, route, sizeof(struct routing_entry));
+
+ new_route->link_idx = link_idxs[new_route->link_idx];
+
+ if (route->src_link_idx != -1)
+ new_route->src_link_idx = link_idxs[new_route->src_link_idx];
+
+ if((__add_route_entry(new_route)) == -1){
+ PrintDebug("VNET: Adding route fails");
+ V3_Free(new_route);
+ }
+ new_route = NULL;
+ }
-// TODO:
-static int init_link_tables(struct link_entry *link_tab, uint16_t size)
-{
- //struct link_entry *link;
return 0;
}
-#endif
-
struct table_init_info {
addr_t routing_table_start;
uint16_t routing_table_size;
uint16_t link_table_size;
};
+//add the guest specified routes and links to the tables
static int handle_init_tables_hcall(struct guest_info * info, uint_t hcall_id, void * priv_data) {
- uint8_t * buf = NULL;
- addr_t info_addr = (addr_t)info->vm_regs.rcx;
+ addr_t guest_addr = (addr_t)info->vm_regs.rcx;
+ addr_t info_addr, route_addr, link_addr;
+ struct table_init_info *init_info;
+ struct link_entry *link_array;
+ struct routing_entry *route_array;
+
+ if (guest_va_to_host_va(info, guest_addr, &info_addr) == -1) {
+ PrintError("VNET: Could not translate guest address\n");
+ return -1;
+ }
+
+ init_info = (struct table_init_info *)info_addr;
- if (guest_va_to_host_va(info, info_addr, (addr_t *)&(buf)) == -1) {
- PrintError("Could not translate buffer address\n");
+ if (guest_va_to_host_va(info, init_info->routing_table_start, &route_addr) == -1) {
+ PrintError("VNET: Could not translate guest address\n");
return -1;
}
+ route_array = (struct routing_entry *)route_addr;
- //struct table_init_info *init_info = (struct table_init_info *)buf;
+ if (guest_va_to_host_va(info, init_info->link_table_start, &link_addr) == -1) {
+ PrintError("VNET: Could not translate guest address\n");
+ return -1;
+ }
+ link_array = (struct link_entry *)link_addr;
+
+ addto_routing_link_tables(route_array, init_info->routing_table_size, link_array, init_info->link_table_size);
return 0;
}
v3_register_hypercall(vm, VNET_INITAB_HCALL, handle_init_tables_hcall, NULL);
- //store_test_topologies(udp_data_socket);
-
PrintDebug("VNET Initialized\n");
}
