+++ /dev/null
-/*
- * This file is part of the Palacios Virtual Machine Monitor developed
- * by the V3VEE Project with funding from the United States National
- * Science Foundation and the Department of Energy.
- *
- * The V3VEE Project is a joint project between Northwestern University
- * and the University of New Mexico. You can find out more at
- * http://www.v3vee.org
- *
- * Copyright (c) 2009, Lei Xia <lxia@northwestern.edu>
- * Copyright (c) 2009, Yuan Tang <ytang@northwestern.edu>
- * Copyright (c) 2009, Jack Lange <jarusl@cs.northwestern.edu>
- * Copyright (c) 2009, Peter Dinda <pdinda@northwestern.edu>
- * Copyright (c) 2009, The V3VEE Project <http://www.v3vee.org>
- * All rights reserved.
- *
- * Author: Lei Xia <lxia@northwestern.edu>
- * Yuan Tang <ytang@northwestern.edu>
- * Jack Lange <jarusl@cs.northwestern.edu>
- * Peter Dinda <pdinda@northwestern.edu
- *
- * This is free software. You are permitted to use,
- * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
- */
-
-#include <devices/vnet.h>
-
-static const char any_type_str[] = "any";
-static const char not_type_str[] = "not";
-static const char none_type_str[] = "none";
-static const char empty_type_str[] = "empty";
-
-static const char link_edge_str[] = "EDGE";
-static const char link_any_str[] = "ANY";
-
-typedef enum {MAC_ANY, MAC_NOT, MAC_NONE, MAC_EMPTY} mac_type_t;
-typedef enum {LINK_EDGE, LINK_ANY} link_type_t;
-
-
-struct raw_ethernet_pkt {
- int size;
- char data[ETHERNET_PACKET_LEN];
-};
-
-static struct topology g_links[MAX_LINKS];
-static int g_num_links; //The current number of links
-static int g_first_link;
-static int g_last_link;
-
-static struct routing g_routes[MAX_ROUTES];
-static int g_num_routes; //The current number of routes
-static int g_first_route;
-static int g_last_route;
-
-static struct device_list g_devices[MAX_DEVICES];
-static int g_num_devices;
-static int g_first_device;
-static int g_last_device;
-
-
-static void print_packet(char *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) {
- PrintDebug("Vnet: print_packet_destination_addr: ");
- v3_hexdump(pkt + 8, 6, NULL, 0);
-
- PrintDebug("Vnet: print_packet_source_addr: ");
- v3_hexdump(pkt + 14, 6, NULL, 0);
-}
-
-static void print_device_addr(char *ethaddr) {
- PrintDebug("Vnet: print_device_addr: ");
- v3_hexdump(ethaddr, 6, NULL, 0);
-}
-#endif
-
-
-//network connection functions
-static inline void raw_ethernet_packet_init(struct raw_ethernet_pkt * pt, const char * data, const size_t size) {
- pt->size = size;
- memcpy(pt->data, data, size);
-}
-
-
-
-
-
-/* Hash key format:
- * 0-5: src_eth_addr
- * 6-11: dest_eth_addr
- * 12: src type
- * 13-16: src index
- */
-typedef char * route_hashkey_t;
-
-// This is the hash value, Format: 0: num_matched_routes, 1...n: matches[] -- TY
-struct route_cache_entry {
- int num_matched_routes;
- int * matches;
-};
-
-#define HASH_KEY_LEN 16
-#define MIN_CACHE_SIZE 100
-
-//Header of the route cache
-static struct hashtable * g_route_cache;
-
-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) {
- 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() {
- g_route_cache = v3_create_htable(MIN_CACHE_SIZE, &hash_from_key_fn, &hash_key_equal);
-
- if (g_route_cache == NULL){
- PrintError("Vnet: Route Cache Initiate Failurely\n");
- return -1;
- }
-
- return 0;
-}
-
-static void make_hash_key(route_hashkey_t hashkey, char src_addr[6], char dest_addr[6], char src_type, int src_index) {
- int j;
-
- for (j = 0; j < 6; j++) {
- hashkey[j] = src_addr[j];
- hashkey[j + 6] = dest_addr[j] + 1;
- }
-
- hashkey[12] = src_type;
-
- *(int *)(hashkey + 12) = src_index;
-}
-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){
- PrintError("Vnet: Malloc fails\n");
- return -1;
- }
-
- new_entry->num_matched_routes = num_matched_r;
-
- new_entry->matches = (int *)V3_Malloc(num_matched_r * sizeof(int));
-
- if (new_entry->matches == NULL){
- PrintError("Vnet: Malloc fails\n");
- return -1;
- }
-
- for (i = 0; i < num_matched_r; i++) {
- 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){
- 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() {
- 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){
- PrintError("Vnet: Route Cache Create Failurely\n");
- return -1;
- }
-
- return 0;
-}
-
-static int look_into_cache(route_hashkey_t hashkey, int * matches) {
- 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);
-
- if (found != NULL) {
- n_matches = found->num_matched_routes;
-
- for (i = 0; i < n_matches; i++) {
- matches[i] = found->matches[i];
- }
- }
-
- return n_matches;
-}
-
-
-
-
-static inline uint8_t hex_nybble_to_nybble(const uint8_t hexnybble) {
- uint8_t x = toupper(hexnybble);
-
- if (isdigit(x)) {
- return x - '0';
- } else {
- return 10 + (x - 'A');
- }
-}
-
-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]) {
- int k;
-
- for (k = 0; k < 6; k++) {
- mac[k] = hex_byte_to_byte(&(str[(2 * k) + k]));
- }
-}
-
-static inline void mac_to_string(uint8_t mac[6], char * buf) {
- snprintf("%x:%x:%x:%x:%x:%x",
- mac[0], mac[1], mac[2],
- mac[3], mac[4], mac[5]);
-}
-
-#if 0
-static void ip_to_string(uint32_t addr, char * buf) {
- uint32_t addr_st;
- char * tmp_str;
-
- addr_st = v3_htonl(addr);
- tmp_str = v3_inet_ntoa(addr_st);
-
- memcpy(buf, tmp_str, strlen(tmp_str));
-}
-#endif
-
-int find_link_by_fd(SOCK sock) {
- int i;
-
- FOREACH_LINK(i, g_links, g_first_link) {
- if (g_links[i].link_sock == sock) {
- return i;
- }
- }
-
- return -1;
-}
-
-int vnet_add_link_entry(unsigned long dest, int type, int data_port, SOCK fd) {
- int i;
-
- for (i = 0; i < MAX_LINKS; i++) {
- if (g_links[i].use == 0) {
- g_links[i].dest = dest;
- g_links[i].type = type;
- g_links[i].link_sock = fd;
- g_links[i].remote_port = data_port;
- g_links[i].use = 1;
-
- if (g_first_link == -1) {
- g_first_link = i;
- }
-
- g_links[i].prev = g_last_link;
- g_links[i].next = -1;
-
- if (g_last_link != -1) {
- g_links[g_last_link].next = i;
- }
-
- g_last_link = i;
-
- g_num_links++;
-
- return i;
- }
- }
-
- return -1;
-}
-
-
-int add_sock(struct sock_list *socks, int len, int *first_sock, int *last_sock, SOCK fd) {
- int i;
-
- for (i = 0; i < len; i++) {
- if (socks[i].sock == -1) {
- socks[i].sock = fd;
-
- if (*first_sock == -1) {
- *first_sock = i;
- }
-
- socks[i].prev = *last_sock;
- socks[i].next = -1;
-
- if (*last_sock != -1) {
- socks[*last_sock].next = i;
- }
-
- *last_sock = i;
-
- return i;
- }
- }
- return -1;
-}
-
-
-int vnet_add_route_entry(char src_mac[6], char dest_mac[6], int src_mac_qual, int dest_mac_qual, int dest, int type, int src, int src_type) {
- int i;
-
- for(i = 0; i < MAX_ROUTES; i++) {
- if (g_routes[i].use == 0) {
-
- if ((src_mac_qual != ANY_TYPE) && (src_mac_qual != NONE_TYPE)) {
- memcpy(g_routes[i].src_mac, src_mac, 6);
- } else {
- memset(g_routes[i].src_mac, 0, 6);
- }
-
- if ((dest_mac_qual != ANY_TYPE) && (dest_mac_qual != NONE_TYPE)) {
- memcpy(g_routes[i].dest_mac, dest_mac, 6);
- } else {
- memset(g_routes[i].dest_mac, 0, 6);
- }
-
- g_routes[i].src_mac_qual = src_mac_qual;
- g_routes[i].dest_mac_qual = dest_mac_qual;
- g_routes[i].dest = dest;
- g_routes[i].type = type;
- g_routes[i].src = src;
- g_routes[i].src_type = src_type;
- g_routes[i].use = 1;
-
- if (g_first_route == -1) {
- g_first_route = i;
- }
-
- g_routes[i].prev = g_last_route;
- g_routes[i].next = -1;
-
- if (g_last_route != -1) {
- g_routes[g_last_route].next = i;
- }
-
- g_last_route = i;
-
- g_num_routes++;
-
- return i;
- }
- }
-
- clear_hash_cache();
-
- return -1;
-}
-
-
-static int find_link_entry(unsigned long dest, int type) {
- int i;
-
- FOREACH_LINK(i, g_links, g_first_link) {
- if ((g_links[i].dest == dest) &&
- ((type == -1) || (g_links[i].type == type)) ) {
- return i;
- }
- }
-
- return -1;
-}
-
-static int delete_link_entry(int index) {
- int next_i;
- int prev_i;
-
- if (g_links[index].use == 0) {
- return -1;
- }
-
- g_links[index].dest = 0;
- g_links[index].type = 0;
- g_links[index].link_sock = -1;
- g_links[index].use = 0;
-
- prev_i = g_links[index].prev;
- next_i = g_links[index].next;
-
- if (prev_i != -1) {
- g_links[prev_i].next = g_links[index].next;
- }
-
- if (next_i != -1) {
- g_links[next_i].prev = g_links[index].prev;
- }
-
- if (g_first_link == index) {
- g_first_link = g_links[index].next;
- }
-
- if (g_last_link == index) {
- g_last_link = g_links[index].prev;
- }
-
- g_links[index].next = -1;
- g_links[index].prev = -1;
-
- g_num_links--;
-
- return 0;
-}
-
-int vnet_delete_link_entry_by_addr(unsigned long dest, int type) {
- int index = find_link_entry(dest, type);
-
- if (index == -1) {
- return -1;
- }
-
- return delete_link_entry(index);
-}
-
-
-static int find_route_entry(char src_mac[6],
- char dest_mac[6],
- int src_mac_qual,
- int dest_mac_qual,
- int dest,
- int type,
- int src,
- int src_type) {
- int i;
- char temp_src_mac[6];
- char temp_dest_mac[6];
-
- if ((src_mac_qual != ANY_TYPE) && (src_mac_qual != NONE_TYPE)) {
- memcpy(temp_src_mac, src_mac, 6);
- } else {
- memset(temp_src_mac, 0, 6);
- }
-
- if ((dest_mac_qual != ANY_TYPE) && (dest_mac_qual != NONE_TYPE)) {
- memcpy(temp_dest_mac, dest_mac, 6);
- } else {
- memset(temp_dest_mac, 0, 6);
- }
-
- FOREACH_LINK(i, g_routes, g_first_route) {
- if ( (memcmp(temp_src_mac, g_routes[i].src_mac, 6) == 0) &&
- (memcmp(temp_dest_mac, g_routes[i].dest_mac, 6) == 0) &&
- (g_routes[i].src_mac_qual == src_mac_qual) &&
- (g_routes[i].dest_mac_qual == dest_mac_qual) &&
- ( (type == -1) ||
- ( (type == g_routes[i].type) && (g_routes[i].dest == dest)) ) &&
- ( (src_type == -1) ||
- ( (src_type == g_routes[i].src_type) && (g_routes[i].src == src)) ) ) {
- return i;
- }
- }
-
- return -1;
-}
-
-static int delete_route_entry(int index) {
- int next_i;
- int prev_i;
-
- memset(g_routes[index].src_mac, 0, 6);
- memset(g_routes[index].dest_mac, 0, 6);
-
- g_routes[index].dest = 0;
- g_routes[index].src = 0;
- g_routes[index].src_mac_qual = 0;
- g_routes[index].dest_mac_qual = 0;
- g_routes[index].type = -1;
- g_routes[index].src_type = -1;
- g_routes[index].use = 0;
-
- prev_i = g_routes[index].prev;
- next_i = g_routes[index].next;
-
- if (prev_i != -1) {
- g_routes[prev_i].next = g_routes[index].next;
- }
-
- if (next_i != -1) {
- g_routes[next_i].prev = g_routes[index].prev;
- }
-
- if (g_first_route == index) {
- g_first_route = g_routes[index].next;
- }
-
- if (g_last_route == index) {
- g_last_route = g_routes[index].prev;
- }
-
- g_routes[index].next = -1;
- g_routes[index].prev = -1;
-
- g_num_routes--;
-
- clear_hash_cache();
-
- 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 dest,
- int type,
- int src,
- int src_type) {
- int index = find_route_entry(src_mac, dest_mac, src_mac_qual,
- dest_mac_qual, dest, type, src, src_type);
-
- if (index == -1) {
- return -1;
- }
-
- delete_route_entry(index);
-
- return 0;
-}
-
-int delete_sock(struct sock_list * socks, int * first_sock, int * last_sock, SOCK fd) {
- int i;
- int prev_i;
- int next_i;
-
-
- FOREACH_SOCK(i, socks, (*first_sock)) {
- if (socks[i].sock == fd) {
- V3_Close_Socket(socks[i].sock);
- socks[i].sock = -1;
-
- prev_i = socks[i].prev;
- next_i = socks[i].next;
-
- if (prev_i != -1) {
- socks[prev_i].next = socks[i].next;
- }
-
- if (next_i != -1) {
- socks[next_i].prev = socks[i].prev;
- }
-
- if (*first_sock == i) {
- *first_sock = socks[i].next;
- }
-
- if (*last_sock == i) {
- *last_sock = socks[i].prev;
- }
-
- socks[i].next = -1;
- socks[i].prev = -1;
-
- return 0;
- }
- }
- return -1;
-}
-
-//setup the topology of the testing network
-static void store_topologies(SOCK fd) {
- int i;
- int src_mac_qual = ANY_TYPE;
- int dest_mac_qual = ANY_TYPE;
- 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= ANY_SRC_TYPE;
- int data_port = 22;
-
- //store link table
- for (i = 0; i < MAX_LINKS; i++) {
- if (g_links[i].use == 0) {
- g_links[i].dest = (int)dest;
- g_links[i].type = type;
- g_links[i].link_sock = fd;
- g_links[i].remote_port = data_port;
- g_links[i].use = 1;
-
- if (g_first_link == -1) {
- g_first_link = i;
- }
-
- g_links[i].prev = g_last_link;
- g_links[i].next = -1;
-
- if (g_last_link != -1) {
- g_links[g_last_link].next = i;
- }
-
- g_last_link = i;
-
- g_num_links++;
- PrintDebug("VNET: store_topologies. new link: socket: %d, remote %x:[%d]\n", g_links[i].link_sock, (uint_t)g_links[i].dest, g_links[i].remote_port);
- }
- }
-
-
- //store route table
-
- type = EDGE_TYPE;
- dest = 0;
-
- for (i = 0; i < MAX_ROUTES; i++) {
- if (g_routes[i].use == 0) {
- if ((src_mac_qual != ANY_TYPE) && (src_mac_qual != NONE_TYPE)) {
- // memcpy(g_routes[i].src_mac, src_mac, 6);
- } else {
- memset(g_routes[i].src_mac, 0, 6);
- }
-
- if ((dest_mac_qual != ANY_TYPE) && (dest_mac_qual != NONE_TYPE)) {
- // memcpy(g_routes[i].dest_mac, dest_mac, 6);
- } else {
- memset(g_routes[i].dest_mac, 0, 6);
- }
-
- g_routes[i].src_mac_qual = src_mac_qual;
- g_routes[i].dest_mac_qual = dest_mac_qual;
- g_routes[i].dest = (int)dest;
- g_routes[i].type = type;
- g_routes[i].src = src;
- g_routes[i].src_type = src_type;
-
- g_routes[i].use = 1;
-
- if (g_first_route == -1) {
- g_first_route = i;
- }
-
- g_routes[i].prev = g_last_route;
- g_routes[i].next = -1;
-
- if (g_last_route != -1) {
- g_routes[g_last_route].next = i;
- }
-
- g_last_route = i;
-
- g_num_routes++;
-
- PrintDebug("VNET: store_topologies. new route: src_mac: %s, dest_mac: %s, dest: %d\n", g_routes[i].src_mac, g_routes[i].dest_mac, dest);
-
- }
- }
-}
-
-static int match_route(uint8_t * src_mac, uint8_t * dst_mac, int src_type, int src_index, int * matches) {
- int values[MAX_ROUTES];
- int matched_routes[MAX_ROUTES];
-
- int num_matches = 0;
- int i;
- int max = 0;
- int no = 0;
- int exact_match = 0;
-
- FOREACH_ROUTE(i, g_routes, g_first_route) {
- if ((g_routes[i].src_type != ANY_SRC_TYPE) &&
- ((g_routes[i].src_type != src_type) ||
- ((g_routes[i].src != src_index) &&
- (g_routes[i].src != -1)))) {
- PrintDebug("Vnet: MatchRoute: Source route is on and does not match\n");
- continue;
- }
-
- if ( (g_routes[i].dest_mac_qual == ANY_TYPE) &&
- (g_routes[i].src_mac_qual == ANY_TYPE) ) {
- matched_routes[num_matches] = i;
- values[num_matches] = 3;
- num_matches++;
- }
-
- if (memcmp((void *)&g_routes[i].src_mac, (void *)src_mac, 6) == 0) {
- if (g_routes[i].src_mac_qual != NOT_TYPE) {
- if (g_routes[i].dest_mac_qual == ANY_TYPE) {
- matched_routes[num_matches] = i;
- values[num_matches] = 6;
-
- num_matches++;
- } else if (memcmp((void *)&g_routes[i].dest_mac, (void *)dst_mac, 6) == 0) {
- if (g_routes[i].dest_mac_qual != NOT_TYPE) {
- matched_routes[num_matches] = i;
- values[num_matches] = 8;
- exact_match = 1;
- num_matches++;
- }
- }
- }
- }
-
- if (memcmp((void *)&g_routes[i].dest_mac, (void *)dst_mac, 6) == 0) {
- if (g_routes[i].dest_mac_qual != NOT_TYPE) {
- if (g_routes[i].src_mac_qual == ANY_TYPE) {
- matched_routes[num_matches] = i;
- values[num_matches] = 6;
-
- num_matches++;
- } else if (memcmp((void *)&g_routes[i].src_mac, (void *)src_mac, 6) == 0) {
- if (g_routes[i].src_mac_qual != NOT_TYPE) {
- if (exact_match == 0) {
- matched_routes[num_matches] = i;
- values[num_matches] = 8;
- num_matches++;
- }
- }
- }
- }
- }
-
- if ((g_routes[i].dest_mac_qual == NOT_TYPE) &&
- (memcmp((void *)&g_routes[i].dest_mac, (void *)dst_mac, 6) != 0)) {
- if (g_routes[i].src_mac_qual == ANY_TYPE) {
- matched_routes[num_matches] = i;
- values[num_matches] = 5;
- num_matches++;
- } else if (memcmp((void *)&g_routes[i].src_mac, (void *)src_mac, 6) == 0) {
- if (g_routes[i].src_mac_qual != NOT_TYPE) {
- matched_routes[num_matches] = i;
- values[num_matches] = 7;
- num_matches++;
- }
- }
- }
-
- if ((g_routes[i].src_mac_qual == NOT_TYPE) &&
- (memcmp((void *)&g_routes[i].src_mac, (void *)src_mac, 6) != 0)) {
- if (g_routes[i].dest_mac_qual == ANY_TYPE) {
- matched_routes[num_matches] = i;
- values[num_matches] = 5;
- num_matches++;
- } else if (memcmp((void *)&g_routes[i].dest_mac, (void *)dst_mac, 6) == 0) {
- if (g_routes[i].dest_mac_qual != NOT_TYPE) {
- matched_routes[num_matches] = i;
- values[num_matches] = 7;
- num_matches++;
- }
- }
- }
- }
- //end FOREACH_ROUTE
-
- FOREACH_ROUTE(i, g_routes, g_first_route) {
- if ((memcmp((void *)&g_routes[i].src_mac, (void *)src_mac, 6) == 0) &&
- (g_routes[i].dest_mac_qual == NONE_TYPE) &&
- ((g_routes[i].src_type == ANY_SRC_TYPE) ||
- ((g_routes[i].src_type == src_type) &&
- ((g_routes[i].src == src_index) ||
- (g_routes[i].src == -1))))) {
- matched_routes[num_matches] = i;
- values[num_matches] = 4;
- PrintDebug("Vnet: MatchRoute: We matched a default route (%d)\n", i);
- num_matches++;
- }
- }
-
- //If many rules have been matched, we choose one which has the highest value rating
- if (num_matches == 0) {
- return 0;
- }
-
- for (i = 0; i < num_matches; i++) {
- if (values[i] > max) {
- no = 0;
- max = values[i];
- matches[no] = matched_routes[i];
- no++;
- } else if (values[i] == max) {
- matches[no] = matched_routes[i];
- no++;
- }
- }
-
- return no;
-}
-
-static inline int if_write_pkt(struct vnet_if_device *iface, struct raw_ethernet_pkt * pkt) {
- return iface->input((uchar_t *)pkt->data, pkt->size);
-}
-
-static int handle_one_pkt(struct raw_ethernet_pkt * pkt) {
- int src_link_index = 0; //the value of src_link_index of udp always is 0
- int i;
- char src_mac[6];
- char dst_mac[6];
-
- int matches[g_num_routes];
- int num_matched_routes = 0;
-
- struct HEADERS headers;
-
- // get the ethernet and ip headers from the packet
- memcpy((void *)&headers, (void *)pkt->data, sizeof(headers));
-
- int j;
- for (j = 0;j < 6; j++) {
- src_mac[j] = headers.ethernetsrc[j];
- dst_mac[j] = headers.ethernetdest[j];
- }
-
-
-#ifdef DEBUG
- char dest_str[18];
- char src_str[18];
-
- mac_to_string(src_mac, src_str);
- mac_to_string(dst_mac, dest_str);
-
- 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, EDGE_TYPE, src_link_index);
-
- num_matched_routes = look_into_cache((route_hashkey_t)hash_key, matches);
-
- if (num_matched_routes == -1) { //no match
- num_matched_routes = match_route(src_mac, dst_mac, pkt->type, src_link_index, 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++) {
- int route_index = -1;
- int link_index = -1;
- int dev_index = -1;
-
- route_index = matches[i];
-
- PrintDebug("Vnet: HandleDataOverLink: Forward packet from link according to Route entry %d\n", route_index);
-
- if (g_routes[route_index].type == EDGE_TYPE) {
- link_index = g_routes[route_index].dest;
-
- if(g_links[link_index].type == UDP_TYPE) {
- int size;
-
- if ((size = V3_SendTo_IP(g_links[link_index].link_sock, g_links[link_index].dest, g_links[link_index].remote_port, pkt->data, pkt->size)) != pkt->size) {
- PrintError("Vnet: sending by UDP Exception, %x\n", size);
- return -1;
- }
-
- PrintDebug("Vnet: HandleDataOverLink: Serializing UDP Packet to link_sock [%d], dest [%x], remote_port [%d], size [%d]\n", g_links[link_index].link_sock, (uint_t)g_links[link_index].dest, g_links[link_index].remote_port, (int)pkt->size);
-
- } else if (g_links[link_index].type == TCP_TYPE) {
-
- }
- } else if (g_routes[route_index].type == INTERFACE_TYPE) {
- dev_index = g_routes[route_index].dest;
-
- PrintDebug("Writing Packet to device=%s\n", g_devices[dev_index].device->name);
-
- if (if_write_pkt(g_devices[dev_index].device, pkt) == -1) {
- PrintDebug("Can't write output packet to link\n");
- return -1;
- }
- } else {
- PrintDebug("Vnet: Wrong Edge type\n");
- }
- }
-
- return 0;
-}
-
-static int send_ethernet_pkt(char * buf, int length) {
- struct raw_ethernet_pkt * pt;
-
- pt = (struct raw_ethernet_pkt *)V3_Malloc(sizeof(struct raw_ethernet_pkt));
- raw_ethernet_packet_init(pt, buf, length); //====here we copy sending data once
-
- PrintDebug("VNET: vm_send_pkt: transmitting packet: (size:%d)\n", (int)pt->size);
- print_packet((char *)buf, length);
-
- v3_enqueue(g_inpkt_q, (addr_t)pt);
- return 0;
-
-}
-
-int V3_Send_pkt(uchar_t *buf, int length) {
- PrintDebug("VNET: In V3_Send_pkt: pkt length %d\n", length);
-
- return send_ethernet_pkt((char *)buf, length);
-}
-
-static int add_device_to_table(struct vnet_if_device*device, int type) {
- int i;
-
- for (i = 0; i < MAX_DEVICES; i++) {
- if (g_devices[i].use == 0) {
- g_devices[i].type = type;
- g_devices[i].use = 1;
-
- if (g_first_device == -1) {
- g_first_device = i;
- }
-
- g_devices[i].prev = g_last_device;
- g_devices[i].next = -1;
-
- if (g_last_device != -1) {
- g_devices[g_last_device].next = i;
- }
-
- g_last_device = i;
- g_num_devices++;
-
- return i;
- }
- }
-
- return -1;
-}
-
-static int search_device(char *device_name) {
- int i;
-
- for (i = 0; i < MAX_DEVICES; i++) {
- if (g_devices[i].use == 1) {
- if (!strcmp(device_name, g_devices[i].device->name)) {
- return i;
- }
- }
- }
-
- return -1;
-}
-
-static struct vnet_if_device * delete_device_from_table(int index) {
- int next_i;
- int prev_i;
- struct vnet_if_device * device = NULL;
-
- if (g_devices[index].use == 0) {
- return NULL;
- }
-
- g_devices[index].use = 0;
-
- prev_i = g_devices[index].prev;
- next_i = g_devices[index].next;
-
- if (prev_i != -1) {
- g_devices[prev_i].next = g_devices[index].next;
- }
-
- if (next_i != -1) {
- g_devices[next_i].prev = g_devices[index].prev;
- }
-
- if (g_first_device == index) {
- g_first_device = g_devices[index].next;
- }
-
- if (g_last_device == index) {
- g_last_device = g_devices[index].prev;
- }
-
- g_devices[index].next = -1;
- g_devices[index].prev = -1;
-
- device = g_devices[index].device;
- g_devices[index].device = NULL;
-
- g_num_devices--;
-
- return device;
-}
-
-
-int vnet_register_device(char * dev_name, int (*netif_input)(uchar_t * pkt, uint_t size), void * data) {
- struct vnet_if_device * dev;
-
- dev = (struct vnet_if_device *)V3_Malloc(sizeof(struct vnet_if_device));
-
- if (dev == NULL){
- PrintError("VNET: Malloc fails\n");
- return -1;
- }
-
- strncpy(dev->name, dev_name, 50);
- dev->input = netif_input;
- dev->data = data;
-
- if (add_device_to_table(dev, GENERAL_NIC) == -1) {
- return -1;
- }
-
- return 0;
-}
-
-int vnet_unregister_device(char * dev_name) {
- int i;
-
- i = search_device(dev_name);
-
- if (i == -1) {
- return -1;
- }
-
- struct vnet_if_device * device = delete_device_from_table(i);
-
- if (device == NULL) {
- return -1;
- }
-
- V3_Free(device);
-
- return 0;
-}
-
-int V3_Register_pkt_event(int (*netif_input)(uchar_t * pkt, uint_t size)) {
- return vnet_register_device("NE2000", netif_input, NULL);
-}
-
-int vnet_pkt_process() {
- struct raw_ethernet_pkt * pt;
- int i;
-
- PrintDebug("VNET: In vnet_check\n");
-
- while ((pt = (struct raw_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);
-
- if(handle_one_pkt(pt)) {
- PrintDebug("VNET: vnet_check: handle one packet!\n");
- }
-
- V3_Free(pt); //be careful here
- }
-
- return 0;
-}
-
-
-
-static int process_udpdata() {
- struct raw_ethernet_pkt * pt;
-
- uint32_t dest = 0;
- uint16_t remote_port = 0;
- SOCK link_sock = g_udp_sockfd;
- int length = sizeof(struct raw_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 raw_ethernet_pkt *)V3_Malloc(sizeof(struct raw_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);
-
-
- //V3_Yield();
- }
-}
-
-
-
-static void init_link_table() {
- int i;
-
- for (i = 0; i < MAX_LINKS; i++) {
- g_links[i].use = 0;
- g_links[i].next = -1;
- g_links[i].prev = -1;
- }
-
- g_first_link = -1;
- g_last_link = -1;
- g_num_links = 0;
-}
-
-static void init_device_table() {
- int i;
-
- for (i = 0; i < MAX_DEVICES; i++) {
- g_devices[i].use = 0;
- g_devices[i].next = -1;
- g_devices[i].prev = -1;
- }
-
- g_first_device = -1;
- g_last_device = -1;
- g_num_devices = 0;
-}
-
-static void init_route_table() {
- int i;
-
- for (i = 0; i < MAX_ROUTES; i++) {
- g_routes[i].use = 0;
- g_routes[i].next = -1;
- g_routes[i].prev = -1;
- }
-
- g_first_route = -1;
- g_last_route = -1;
- g_num_routes = 0;
-}
-
-static void init_tables() {
- init_link_table();
- init_device_table();
- init_route_table();
- init_route_cache();
-}
-
-
-void v3_vnet_init() {
-
- PrintDebug("VNET Init: Vnet input queue successful.\n");
-
- init_tables();
-
-
- store_topologies(udp_data_socket);
-
- start_recv_data();
-}
-
-
