struct ethernet_pkt {
- uint32_t size;
- uint16_t type;
- char data[ETHERNET_PACKET_LEN];
+ 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 const uint_t hash_key_size = 16;
struct link_table {
- struct link_entry *links[MAX_LINKS];
+ struct link_entry * links[MAX_LINKS];
uint16_t size;
};
struct routing_table {
- struct routing_entry *routes[MAX_ROUTES];
+ struct routing_entry * routes[MAX_ROUTES];
uint16_t size;
};
static struct link_table g_links;
static struct routing_table g_routes;
-static struct gen_queue *g_inpkt_q;
+static struct gen_queue * g_inpkt_q;
/* Hash key format:
* 0-5: src_eth_addr
* 12: src type
* 13-16: src index
*/
-typedef char *route_hashkey_t;
+typedef char * route_hashkey_t;
// This is the hash value, Format: 0: num_matched_routes, 1...n: matches[] -- TY
struct route_cache_entry {
int * matches;
};
-//the route cache
-static struct hashtable *g_route_cache;
+// the route cache
+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);
}
#if 0
-static void print_packet_addr(char *pkt) {
+static void print_packet_addr(char * pkt) {
PrintDebug("Vnet: print_packet_destination_addr: ");
v3_hexdump(pkt + 8, 6, NULL, 0);
v3_hexdump(pkt + 14, 6, NULL, 0);
}
-static void print_device_addr(char *ethaddr) {
+static void print_device_addr(char * ethaddr) {
PrintDebug("Vnet: print_device_addr: ");
v3_hexdump(ethaddr, 6, 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);
}
-static uint_t hash_from_key_fn(addr_t hashkey)
-{
+static uint_t hash_from_key_fn(addr_t hashkey) {
uint8_t * key = (uint8_t *)hashkey;
return v3_hash_buffer(key, HASH_KEY_LEN);
}
-static int hash_key_equal(addr_t key1, addr_t key2)
-{
+static int hash_key_equal(addr_t key1, addr_t key2) {
uint8_t * buf1 = (uint8_t *)key1;
uint8_t * buf2 = (uint8_t *)key2;
return (memcmp(buf1, buf2, HASH_KEY_LEN) == 0);
}
-static int init_route_cache()
-{
+static int init_route_cache() {
g_route_cache = v3_create_htable(MIN_CACHE_SIZE, &hash_from_key_fn, &hash_key_equal);
- if (g_route_cache == NULL){
+ if (g_route_cache == NULL) {
PrintError("Vnet: Route Cache Initiate Failurely\n");
return -1;
}
}
static void make_hash_key(route_hashkey_t hashkey,
- char src_addr[6],
- char dest_addr[6],
- char src_type,
- int src_index)
-{
+ char src_addr[6],
+ char dest_addr[6],
+ char src_type,
+ int src_index) {
int j;
for (j = 0; j < 6; j++) {
*(int *)(hashkey + 12) = src_index;
}
-static int add_route_to_cache(route_hashkey_t hashkey, int num_matched_r, int *matches)
-{
+static int add_route_to_cache(route_hashkey_t hashkey, int num_matched_r, int * matches) {
struct route_cache_entry * new_entry = NULL;
int i;
new_entry = (struct route_cache_entry *)V3_Malloc(sizeof(struct route_cache_entry));
- if (new_entry == NULL){
+ if (new_entry == NULL) {
PrintError("Vnet: Malloc fails\n");
return -1;
}
new_entry->matches = (int *)V3_Malloc(num_matched_r * sizeof(int));
- if (new_entry->matches == NULL){
+ if (new_entry->matches == NULL) {
PrintError("Vnet: Malloc fails\n");
return -1;
}
new_entry->matches[i] = matches[i];
}
- //here, when v3_htable_insert return 0, it means insert fails
- if (v3_htable_insert(g_route_cache, (addr_t)hashkey, (addr_t)new_entry) == 0){
+ // here, when v3_htable_insert return 0, it means insert fails
+ if (v3_htable_insert(g_route_cache, (addr_t)hashkey, (addr_t)new_entry) == 0) {
PrintError("Vnet: Insert new route entry to cache failed\n");
V3_Free(new_entry->matches);
V3_Free(new_entry);
return 0;
}
-static int clear_hash_cache()
-{
+static int clear_hash_cache() {
v3_free_htable(g_route_cache, 1, 1);
g_route_cache = v3_create_htable(MIN_CACHE_SIZE, hash_from_key_fn, hash_key_equal);
- if (g_route_cache == NULL){
+ if (g_route_cache == NULL) {
PrintError("Vnet: Route Cache Create Failurely\n");
return -1;
}
return 0;
}
-static int look_into_cache(route_hashkey_t hashkey, int *matches)
-{
+static int look_into_cache(route_hashkey_t hashkey, int * matches) {
+ struct route_cache_entry * found = NULL;
int n_matches = -1;
int i = 0;
- struct route_cache_entry * found = NULL;
found = (struct route_cache_entry *)v3_htable_search(g_route_cache, (addr_t)hashkey);
return n_matches;
}
-static inline uint8_t hex_nybble_to_nybble(const uint8_t hexnybble)
-{
+#ifdef CONFIG_DEBUG_VNET
+static inline uint8_t hex_nybble_to_nybble(const uint8_t hexnybble) {
uint8_t x = toupper(hexnybble);
if (isdigit(x)) {
}
}
-static inline uint8_t hex_byte_to_byte(const uint8_t hexbyte[2])
-{
+static inline uint8_t hex_byte_to_byte(const uint8_t hexbyte[2]) {
return ((hex_nybble_to_nybble(hexbyte[0]) << 4) +
(hex_nybble_to_nybble(hexbyte[1]) & 0xf));
}
-static inline void string_to_mac(const char *str, uint8_t mac[6])
-{
+static inline void string_to_mac(const char *str, uint8_t mac[6]) {
int k;
for (k = 0; k < 6; k++) {
}
}
-static inline void mac_to_string(char mac[6], char * buf)
-{
+static inline void mac_to_string(char mac[6], char * buf) {
snprintf(buf, 20, "%x:%x:%x:%x:%x:%x",
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++) {
if (g_links.links[idx] == NULL) {
g_links.links[idx] = link;
- g_links.size ++;
+ g_links.size++;
return idx;
}
}
-
+
+ PrintError("No available Link entry\n");
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++) {
if (g_routes.routes[idx] == NULL) {
g_routes.routes[idx] = route;
- g_routes.size ++;
+ g_routes.size++;
return idx;
}
}
-
+
+ PrintError("No available route entry\n");
return -1;
}
-int vnet_add_route_entry(char src_mac[6],
- char dest_mac[6],
- int src_mac_qual,
- int dest_mac_qual,
- int link_idx,
- link_type_t link_type,
- int src,
- link_type_t src_type)
-{
- struct routing_entry *new_route = (struct routing_entry *)V3_Malloc(sizeof(struct routing_entry));
+static int vnet_add_route_entry(char src_mac[6],
+ char dest_mac[6],
+ int src_mac_qual,
+ int dest_mac_qual,
+ int link_idx,
+ link_type_t link_type,
+ int src,
+ link_type_t src_type) {
+ struct routing_entry * new_route = (struct routing_entry *)V3_Malloc(sizeof(struct routing_entry));
+ int idx = -1;
memset(new_route, 0, sizeof(struct routing_entry));
new_route->src_link_idx = src;
new_route->src_type = src_type;
- int idx = -1;
- 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;
+ }
clear_hash_cache();
return idx;
}
-static void * delete_link_entry(int index)
-{
- struct link_entry *link = NULL;
- void *ret = NULL;
+static void * __delete_link_entry(int index) {
+ struct link_entry * link = NULL;
+ void * ret = NULL;
link_type_t type;
- if (index >= MAX_LINKS || g_links.links[index] == NULL) {
+ if ((index >= MAX_LINKS) || (g_links.links[index] == NULL)) {
return NULL;
}
link = g_links.links[index];
type = g_links.links[index]->type;
- if (type == LINK_INTERFACE)
+ if (type == LINK_INTERFACE) {
ret = (void *)g_links.links[index]->dst_dev;
- else if (type == LINK_EDGE)
+ } else if (type == LINK_EDGE) {
ret = (void *)g_links.links[index]->dst_link;
+ }
g_links.links[index] = NULL;
- g_links.size --;
+ g_links.size--;
V3_Free(link);
int link_idx,
link_type_t link_type,
int src,
- link_type_t src_type)
-{
+ link_type_t src_type) {
int i;
char temp_src_mac[6];
char temp_dest_mac[6];
memset(temp_dest_mac, 0, 6);
}
- for (i = 0; i<MAX_ROUTES; i++) {
+ for (i = 0; i < MAX_ROUTES; i++) {
if (g_routes.routes[i] != NULL) {
if ((memcmp(temp_src_mac, g_routes.routes[i]->src_mac, 6) == 0) &&
- (memcmp(temp_dest_mac, g_routes.routes[i]->dest_mac, 6) == 0) &&
- (g_routes.routes[i]->src_mac_qual == src_mac_qual) &&
- (g_routes.routes[i]->dest_mac_qual == dest_mac_qual) &&
- ((link_type == LINK_ANY) ||
- ((link_type == g_routes.routes[i]->link_type) && (g_routes.routes[i]->link_idx == link_idx))) &&
- ((src_type == LINK_ANY) ||
- ((src_type == g_routes.routes[i]->src_type) && (g_routes.routes[i]->src_link_idx == src)))) {
+ (memcmp(temp_dest_mac, g_routes.routes[i]->dest_mac, 6) == 0) &&
+ (g_routes.routes[i]->src_mac_qual == src_mac_qual) &&
+ (g_routes.routes[i]->dest_mac_qual == dest_mac_qual) &&
+ ( (link_type == LINK_ANY) ||
+ ((link_type == g_routes.routes[i]->link_type) && (g_routes.routes[i]->link_idx == link_idx))) &&
+ ( (src_type == LINK_ANY) ||
+ ((src_type == g_routes.routes[i]->src_type) && (g_routes.routes[i]->src_link_idx == src)))) {
return i;
}
}
return -1;
}
-static int delete_route_entry(int index)
-{
- struct routing_entry *route;
+static int __delete_route_entry(int index) {
+ struct routing_entry * route;
- if (index >= MAX_ROUTES || g_routes.routes[index] == NULL)
- return -1;
+ if ((index >= MAX_ROUTES) || (g_routes.routes[index] == NULL)) {
+ PrintDebug("VNET: wrong index in delete route entry %d\n", index);
+ return -1;
+ }
route = g_routes.routes[index];
g_routes.routes[index] = NULL;
- g_routes.size --;
+ g_routes.size--;
V3_Free(route);
return 0;
}
-int vnet_delete_route_entry_by_addr(char src_mac[6],
- char dest_mac[6],
- int src_mac_qual,
- int dest_mac_qual,
- int link_idx,
- link_type_t type,
- int src,
- link_type_t src_type)
-{
+static int vnet_delete_route_entry_by_addr(char src_mac[6],
+ char dest_mac[6],
+ int src_mac_qual,
+ int dest_mac_qual,
+ int link_idx,
+ link_type_t type,
+ int src,
+ link_type_t src_type) {
int index = find_route_entry(src_mac, dest_mac, src_mac_qual,
dest_mac_qual, link_idx, type, src, src_type);
if (index == -1) {
+ 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, uint8_t *dst_mac, link_type_t src_type, int src_index, int *matches)
-{
+static int match_route(uint8_t * src_mac,
+ uint8_t * dst_mac,
+ link_type_t src_type,
+ int src_index,
+ int * matches) {
int values[MAX_ROUTES];
int matched_routes[MAX_ROUTES];
int no = 0;
int exact_match = 0;
- for(i = 0; i<MAX_ROUTES; i++) {
+ for(i = 0; i < MAX_ROUTES; i++) {
if (g_routes.routes[i] != NULL){
- if ((g_routes.routes[i]->src_type != LINK_ANY) &&
- ((g_routes.routes[i]->src_type != src_type) ||
- ((g_routes.routes[i]->src_link_idx != src_index) &&
- (g_routes.routes[i]->src_link_idx != -1)))) {
+ if ( (g_routes.routes[i]->src_type != LINK_ANY) &&
+ ( (g_routes.routes[i]->src_type != src_type) ||
+ ( (g_routes.routes[i]->src_link_idx != src_index) &&
+ (g_routes.routes[i]->src_link_idx != -1)))) {
PrintDebug("Vnet: MatchRoute: Source route is on and does not match\n");
continue;
}
- if ((g_routes.routes[i]->dest_mac_qual == MAC_ANY) &&
- (g_routes.routes[i]->src_mac_qual == MAC_ANY)) {
- matched_routes[num_matches] = i;
- values[num_matches] = 3;
- num_matches++;
+ if ( (g_routes.routes[i]->dest_mac_qual == MAC_ANY) &&
+ (g_routes.routes[i]->src_mac_qual == MAC_ANY)) {
+
+ matched_routes[num_matches] = i;
+ values[num_matches] = 3;
+ num_matches++;
}
if (memcmp((void *)&g_routes.routes[i]->src_mac, (void *)src_mac, 6) == 0) {
if (g_routes.routes[i]->dest_mac_qual == MAC_ANY) {
matched_routes[num_matches] = i;
values[num_matches] = 6;
-
+
num_matches++;
} else if (memcmp((void *)&g_routes.routes[i]->dest_mac, (void *)dst_mac, 6) == 0) {
if (g_routes.routes[i]->dest_mac_qual != MAC_NOT) {
- matched_routes[num_matches] = i;
- values[num_matches] = 8;
- exact_match = 1;
- num_matches++;
+ matched_routes[num_matches] = i;
+ values[num_matches] = 8;
+ exact_match = 1;
+ num_matches++;
}
}
}
if (g_routes.routes[i]->src_mac_qual == MAC_ANY) {
matched_routes[num_matches] = i;
values[num_matches] = 6;
-
+
num_matches++;
} else if (memcmp((void *)&g_routes.routes[i]->src_mac, (void *)src_mac, 6) == 0) {
if (g_routes.routes[i]->src_mac_qual != MAC_NOT) {
}
}
- if ((g_routes.routes[i]->dest_mac_qual == MAC_NOT) &&
- (memcmp((void *)&g_routes.routes[i]->dest_mac, (void *)dst_mac, 6) != 0)) {
+ if ( (g_routes.routes[i]->dest_mac_qual == MAC_NOT) &&
+ (memcmp((void *)&g_routes.routes[i]->dest_mac, (void *)dst_mac, 6) != 0)) {
if (g_routes.routes[i]->src_mac_qual == MAC_ANY) {
- matched_routes[num_matches] = i;
- values[num_matches] = 5;
- num_matches++;
+ matched_routes[num_matches] = i;
+ values[num_matches] = 5;
+ num_matches++;
} else if (memcmp((void *)&g_routes.routes[i]->src_mac, (void *)src_mac, 6) == 0) {
- if (g_routes.routes[i]->src_mac_qual != MAC_NOT) {
- matched_routes[num_matches] = i;
- values[num_matches] = 7;
- num_matches++;
- }
+ if (g_routes.routes[i]->src_mac_qual != MAC_NOT) {
+ matched_routes[num_matches] = i;
+ values[num_matches] = 7;
+ num_matches++;
+ }
}
}
-
- if ((g_routes.routes[i]->src_mac_qual == MAC_NOT) &&
- (memcmp((void *)&g_routes.routes[i]->src_mac, (void *)src_mac, 6) != 0)) {
- if (g_routes.routes[i]->dest_mac_qual == MAC_ANY) {
- matched_routes[num_matches] = i;
- values[num_matches] = 5;
- num_matches++;
- } else if (memcmp((void *)&g_routes.routes[i]->dest_mac, (void *)dst_mac, 6) == 0) {
- if (g_routes.routes[i]->dest_mac_qual != MAC_NOT) {
- matched_routes[num_matches] = i;
- values[num_matches] = 7;
- num_matches++;
- }
- }
+
+ if ( (g_routes.routes[i]->src_mac_qual == MAC_NOT) &&
+ (memcmp((void *)&g_routes.routes[i]->src_mac, (void *)src_mac, 6) != 0)) {
+ if (g_routes.routes[i]->dest_mac_qual == MAC_ANY) {
+ matched_routes[num_matches] = i;
+ values[num_matches] = 5;
+ num_matches++;
+ } else if (memcmp((void *)&g_routes.routes[i]->dest_mac, (void *)dst_mac, 6) == 0) {
+ if (g_routes.routes[i]->dest_mac_qual != MAC_NOT) {
+ matched_routes[num_matches] = i;
+ values[num_matches] = 7;
+ num_matches++;
+ }
+ }
}
}
- }//end for
+ } // end for
- for(i = 0; i<MAX_ROUTES; i++) {
- if ((memcmp((void *)&g_routes.routes[i]->src_mac, (void *)src_mac, 6) == 0) &&
+ for (i = 0; i < MAX_ROUTES; i++) {
+ if ( (memcmp((void *)&g_routes.routes[i]->src_mac, (void *)src_mac, 6) == 0) &&
(g_routes.routes[i]->dest_mac_qual == MAC_NONE) &&
- ((g_routes.routes[i]->src_type == LINK_ANY) ||
- ((g_routes.routes[i]->src_type == src_type) &&
- ((g_routes.routes[i]->src_link_idx == src_index) ||
- (g_routes.routes[i]->src_link_idx == -1))))) {
+ ( (g_routes.routes[i]->src_type == LINK_ANY) ||
+ ( (g_routes.routes[i]->src_type == src_type) &&
+ ( (g_routes.routes[i]->src_link_idx == src_index) ||
+ (g_routes.routes[i]->src_link_idx == -1))))) {
matched_routes[num_matches] = i;
values[num_matches] = 4;
PrintDebug("Vnet: MatchRoute: We matched a default route (%d)\n", i);
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];
int num_matched_routes = 0;
struct in_pkt_header header;
+
+ char hash_key[hash_key_size];
// get the ethernet and ip headers from the packet
memcpy((void *)&header, (void *)pkt->data, sizeof(header));
PrintDebug("Vnet: HandleDataOverLink. SRC(%s), DEST(%s)\n", src_str, dest_str);
#endif
-
- char hash_key[hash_key_size];
- make_hash_key(hash_key, src_mac, dst_mac, LINK_EDGE, src_link_index);//link_edge -> pt->type???
+
+ // link_edge -> pt->type???
+ make_hash_key(hash_key, src_mac, dst_mac, LINK_EDGE, src_link_index);
num_matched_routes = look_into_cache((route_hashkey_t)hash_key, matches);
- if (num_matched_routes == -1) { //no match
+ if (num_matched_routes == -1) {
+ // 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) {
+ 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;
-
+ 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 || link_index > MAX_LINKS)
+ if ((link_index < 0) ||
+ (link_index > MAX_LINKS) ||
+ (g_links.links[link_index] == NULL)) {
continue;
-
- struct link_entry *link = g_links.links[link_index];
- if (link == NULL)
- 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)
- 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)
- 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;
+
+ return 0;
}
-static int send_ethernet_pkt(char *buf, int length)
-{
- struct ethernet_pkt *pt;
+static int send_ethernet_pkt(uchar_t *data, int len) {
+ struct ethernet_pkt *pkt;
- pt = (struct ethernet_pkt *)V3_Malloc(sizeof(struct ethernet_pkt));
- ethernet_packet_init(pt, buf, length); //====here we copy sending data once
+ pkt = (struct ethernet_pkt *)V3_Malloc(sizeof(struct ethernet_pkt));
+ memset(pkt, 0, sizeof(struct ethernet_pkt));
+
+ if(pkt == NULL){
+ PrintError("VNET: Memory allocate fails\n");
+ return -1;
+ }
- PrintDebug("VNET: vm_send_pkt: transmitting packet: (size:%d)\n", (int)pt->size);
- print_packet((char *)buf, length);
+ ethernet_packet_init(pkt, data, len); //====here we copy sending data once
- v3_enqueue(g_inpkt_q, (addr_t)pt);
+ PrintDebug("VNET: vm_send_pkt: transmitting packet: (size:%d)\n", (int)pkt->size);
+ print_packet((char *)data, len);
+
+ v3_enqueue(g_inpkt_q, (addr_t)pkt);
- return 0;
+ 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)
-{
+static int search_device(char * device_name) {
int i;
for (i = 0; i < MAX_LINKS; i++) {
- if (g_links.links[i] != NULL && g_links.links[i]->type == LINK_INTERFACE) {
- if (!strcmp(device_name, g_links.links[i]->dst_dev->name)) {
+ if ((g_links.links[i] != NULL) && (g_links.links[i]->type == LINK_INTERFACE)) {
+ if (strcmp(device_name, g_links.links[i]->dst_dev->name) == 0) {
return i;
}
}
}
-
+
return -1;
}
-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),
- void *data)
-{
- struct vnet_if_device *if_dev;
+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),
+ void * data) {
+ struct vnet_if_device * if_dev;
int idx = search_device(dev_name);
- if (idx != -1)
+
+ if (idx != -1) {
+ 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){
+ if (if_dev == NULL) {
PrintError("VNET: Malloc fails\n");
return -1;
}
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;
}
-int vnet_unregister_device(char *dev_name)
-{
+#if 0
+static int vnet_unregister_device(char * dev_name) {
int idx;
idx = search_device(dev_name);
if (idx == -1) {
+ 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("VNET: Device %s not in the link table %d, something may be wrong in link table\n", dev_name, idx);
return -1;
}
return idx;
}
-int v3_vnet_pkt_process()
-{
- struct ethernet_pkt *pt;
+#endif
+
+int v3_vnet_pkt_process() {
+ struct ethernet_pkt * pkt;
PrintDebug("VNET: In vnet_check\n");
- while ((pt = (struct ethernet_pkt *)v3_dequeue(g_inpkt_q)) != NULL) {
- PrintDebug("VNET: In vnet_check: pt length %d, pt type %d\n", (int)pt->size, (int)pt->type);
- v3_hexdump(pt->data, pt->size, NULL, 0);
+ while ((pkt = (struct ethernet_pkt *)v3_dequeue(g_inpkt_q)) != NULL) {
+ PrintDebug("VNET: In vnet_check: pt length %d, pt type %d\n", (int)pkt->size, (int)pkt->type);
+ v3_hexdump(pkt->data, pkt->size, NULL, 0);
- if(handle_one_pkt(pt)) {
+ if (handle_one_pkt(pkt)) {
PrintDebug("VNET: vnet_check: handle one packet!\n");
- }else {
+ } else {
PrintError("VNET: vnet_check: fail to forward one packet, discard it!\n");
}
- V3_Free(pt); //be careful here
+ V3_Free(pkt); // be careful here
}
return 0;
}
-static void init_empty_link_table()
-{
+static void init_empty_link_table() {
int i;
- for (i = 0; i < MAX_LINKS; i++)
+ for (i = 0; i < MAX_LINKS; i++) {
g_links.links[i] = NULL;
+ }
-
g_links.size = 0;
}
-static void init_empty_route_table()
-{
+static void init_empty_route_table() {
int i;
- for (i = 0; i < MAX_ROUTES; i++)
+ for (i = 0; i < MAX_ROUTES; i++) {
g_routes.routes[i] = NULL;
+ }
g_links.size = 0;
}
init_route_cache();
}
-static void init_pkt_queue()
-{
+static void init_pkt_queue() {
PrintDebug("VNET Init package receiving queue\n");
g_inpkt_q = v3_create_queue();
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;
};
-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;
+//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) {
+ 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, info_addr, (addr_t *)&(buf)) == -1) {
- PrintError("Could not translate buffer address\n");
+ if (guest_va_to_host_va(info, guest_addr, &info_addr) == -1) {
+ PrintError("VNET: Could not translate guest address\n");
return -1;
}
- //struct table_init_info *init_info = (struct table_init_info *)buf;
-
+ init_info = (struct table_init_info *)info_addr;
+
+ 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;
+
+ 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;
}
-void v3_vnet_init(struct guest_info *vm)
-{
+void v3_vnet_init(struct guest_info * vm) {
init_tables();
init_pkt_queue();
v3_register_hypercall(vm, VNET_INITAB_HCALL, handle_init_tables_hcall, NULL);
- //store_test_topologies(udp_data_socket);
-
- PrintDebug("VNET Initied\n");
+ PrintDebug("VNET Initialized\n");
}
