uint16_t type;
struct udp_link_header ext_hdr; //possible externel header to applied to data before sent
char data[ETHERNET_PACKET_LEN];
-};
+}__attribute__((packed));
// 14 (ethernet frame) + 20 bytes
struct in_pkt_header {
- char ethernetdest[6];
- char ethernetsrc[6];
- unsigned char ethernettype[2]; //layer 3 protocol type
+ uchar_t ethernetdest[6];
+ uchar_t ethernetsrc[6];
+ uchar_t ethernettype[2]; //layer 3 protocol type
char ip[20];
-};
+}__attribute__((packed));
#define VNET_INITAB_HCALL 0xca00 // inital hypercall id
struct link_table {
struct link_entry * links[MAX_LINKS];
uint16_t size;
-};
+}__attribute__((packed));
struct routing_table {
struct routing_entry * routes[MAX_ROUTES];
uint16_t size;
-};
+}__attribute__((packed));
static struct link_table g_links;
static struct routing_table g_routes;
// the route cache
static struct hashtable * g_route_cache;
-
-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) {
- 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
-
static uint16_t ip_xsum(struct ip_header *ip_hdr, int hdr_len){
long sum = 0;
}
#ifdef CONFIG_DEBUG_VNET
+
+static void print_packet(uchar_t *pkt, int size) {
+ PrintDebug("Vnet: print_data_packet: size: %d\n", size);
+ v3_hexdump(pkt, size, NULL, 0);
+}
+
static inline uint8_t hex_nybble_to_nybble(const uint8_t hexnybble) {
uint8_t x = toupper(hexnybble);
}
static inline void mac_to_string(char mac[6], char * buf) {
- snprintf(buf, 20, "%x:%x:%x:%x:%x:%x",
+ snprintf(buf, 20, "%02x:%02x:%02x:%02x:%02x:%02x",
mac[0], mac[1], mac[2],
mac[3], mac[4], mac[5]);
}
+
+static void dump_routes(struct routing_entry **route_tables) {
+ char dest_str[18];
+ char src_str[18];
+ struct routing_entry *route = NULL;
+ int i;
+
+ PrintDebug("\nVnet: route table dump start =====\n");
+
+ for(i = 0; i < MAX_ROUTES; i++) {
+ if (route_tables[i] != NULL){
+ route = route_tables[i];
+
+ mac_to_string(route->src_mac, src_str);
+ mac_to_string(route->dest_mac, dest_str);
+
+ PrintDebug("route: %d\n", i);
+ PrintDebug("SRC(%s), DEST(%s), src_mac_qual(%d), dst_mac_qual(%d)\n", src_str, dest_str, route->src_mac_qual, route->dest_mac_qual);
+ PrintDebug("Src_Link(%d), src_type(%d), dst_link(%d), dst_type(%d)\n\n", route->src_link_idx, route->src_type, route->link_idx, route->link_type);
+ }
+ }
+
+ PrintDebug("\nVnet: route table dump end =====\n");
+}
+
#endif
static int __add_link_entry(struct link_entry * link) {
}
-static int vnet_add_route_entry(char src_mac[6],
+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) {
+ int src_link_idx,
+ link_type_t src_link_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));
- if ((src_mac_qual != MAC_ANY) && (src_mac_qual != MAC_NONE)) {
+ if ((src_mac_qual != MAC_ANY)) {
memcpy(new_route->src_mac, src_mac, 6);
}
- if ((dest_mac_qual != MAC_ANY) && (dest_mac_qual != MAC_NONE)) {
+ if ((dest_mac_qual != MAC_ANY)) {
memcpy(new_route->dest_mac, dest_mac, 6);
}
new_route->dest_mac_qual = dest_mac_qual;
new_route->link_idx= link_idx;
new_route->link_type = link_type;
- new_route->src_link_idx = src;
- new_route->src_type = src_type;
+ new_route->src_link_idx = src_link_idx;
+ new_route->src_type = src_link_type;
if ((idx = __add_route_entry(new_route)) == -1) {
PrintError("Could not add route entry\n");
return idx;
}
+#if 0
static void * __delete_link_entry(int index) {
struct link_entry * link = NULL;
void * ret = NULL;
return __delete_route_entry(index);
}
+#endif
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 * matches) {
int matched_routes[MAX_ROUTES];
-
int num_matches = 0;
int i;
- int max = 0;
- int no = 0;
- int exact_match = 0;
+ struct routing_entry *route = NULL;
+
+#ifdef CONFIG_DEBUG_VNET
+ char dest_str[18];
+ char src_str[18];
+
+ mac_to_string(src_mac, src_str);
+ mac_to_string(dst_mac, dest_str);
+
+ PrintDebug("Vnet: match_route. pkt: SRC(%s), DEST(%s)\n", src_str, dest_str);
+
+ dump_routes(g_routes.routes);
+#endif
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)))) {
- PrintDebug("Vnet: MatchRoute: Source route is on and does not match\n");
- continue;
- }
+ if (g_routes.routes[i] != NULL){
+ route = g_routes.routes[i];
+
+ if(src_type == LINK_ANY && src_index == -1) {
+ if ((route->dest_mac_qual == MAC_ANY) &&
+ (route->src_mac_qual == MAC_ANY)) {
+ matched_routes[num_matches] = i;
+ num_matches++;
+ }
- if ( (g_routes.routes[i]->dest_mac_qual == MAC_ANY) &&
- (g_routes.routes[i]->src_mac_qual == MAC_ANY)) {
+ if (memcmp((void *)&route->src_mac, (void *)src_mac, 6) == 0) {
+ if (route->src_mac_qual != MAC_NOT) {
+ if (route->dest_mac_qual == MAC_ANY) {
+ matched_routes[num_matches] = i;
+ num_matches++;
+ } else if (route->dest_mac_qual != MAC_NOT &&
+ memcmp((void *)&route->dest_mac, (void *)dst_mac, 6) == 0) {
+ matched_routes[num_matches] = i;
+ num_matches++;
+ }
+ }
+ }
- 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]->src_mac_qual != MAC_NOT) {
- 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++;
- }
- }
- }
- }
-
- if (memcmp((void *)&g_routes.routes[i]->dest_mac, (void *)dst_mac, 6) == 0) {
- if (g_routes.routes[i]->dest_mac_qual != MAC_NOT) {
- 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 (exact_match == 0) {
- matched_routes[num_matches] = i;
- values[num_matches] = 8;
- num_matches++;
- }
- }
- }
- }
- }
+ if (memcmp((void *)&route->dest_mac, (void *)dst_mac, 6) == 0) {
+ if (route->dest_mac_qual != MAC_NOT) {
+ if (route->src_mac_qual == MAC_ANY) {
+ matched_routes[num_matches] = i;
+ num_matches++;
+ } else if ((route->src_mac_qual != MAC_NOT) &&
+ (memcmp((void *)&route->src_mac, (void *)src_mac, 6) == 0)) {
+ matched_routes[num_matches] = i;
+ num_matches++;
+ }
+ }
+ }
+
+ if ((route->dest_mac_qual == MAC_NOT) &&
+ (memcmp((void *)&route->dest_mac, (void *)dst_mac, 6) != 0)) {
+ if (route->src_mac_qual == MAC_ANY) {
+ matched_routes[num_matches] = i;
+ num_matches++;
+ } else if ((route->src_mac_qual != MAC_NOT) &&
+ (memcmp((void *)&route->src_mac, (void *)src_mac, 6) == 0)) {
+ matched_routes[num_matches] = i;
+ num_matches++;
+ }
+ }
+
+ if ((route->src_mac_qual == MAC_NOT) &&
+ (memcmp((void *)&route->src_mac, (void *)src_mac, 6) != 0)) {
+ if (route->dest_mac_qual == MAC_ANY) {
+ matched_routes[num_matches] = i;
+ num_matches++;
+ } else if ((route->dest_mac_qual != MAC_NOT) &&
+ (memcmp((void *)&route->dest_mac, (void *)dst_mac, 6) == 0)) {
+ matched_routes[num_matches] = i;
+ num_matches++;
+ }
+ }
+ }//end if src_type == Link_any
+ }
+ }//end for
+
+ PrintDebug("Vnet: match_route: Matches=%d\n", num_matches);
- 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++;
- } 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) &&
- (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
-
- 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))))) {
- 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++;
- }
+ matches[i] = matched_routes[i];
}
- return no;
+ return num_matches;
}
static int handle_one_pkt(struct ethernet_pkt *pkt) {
}
PrintDebug("Vnet: HandleDataOverLink: Matches=%d\n", num_matched_routes);
+
+ if (num_matched_routes == 0) {
+ return -1;
+ }
for (i = 0; i < num_matched_routes; i++) {//send packet to all destinations
int route_index = -1;
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;
- if ((link_index < 0) ||
- (link_index > MAX_LINKS) ||
+ if ((link_index < 0) || (link_index > MAX_LINKS) ||
(g_links.links[link_index] == NULL)) {
continue;
}
link = g_links.links[link_index];
pkt_len = pkt->size;
- if (g_routes.routes[route_index]->link_type == LINK_EDGE) {
+ if (link->type == LINK_EDGE) {
//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));
+ 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;
+ PrintDebug("VNET: Packet not sent properly to link: %d\n", link_index);
+ continue;
}
}else {
PrintDebug("VNET: Link protocol type not support\n");
- return -1;
+ continue;
}
- } else if (g_routes.routes[route_index]->link_type == LINK_INTERFACE) {
+ } else if (link->type == LINK_INTERFACE) {
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;
+ PrintDebug("VNET: Packet not sent properly to link: %d\n", link_index);
+ continue;
}
} else {
- PrintDebug("Vnet: Wrong Edge type\n");
- return -1;
+ PrintDebug("Vnet: Wrong Edge type of link: %d\n", link_index);
+ continue;
}
+
+ PrintDebug("Vnet: HandleDataOverLink: Forward packet according to Route entry %d to link %d\n", route_index, link_index);
}
return 0;
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);
+
+#ifdef CONFIG_DEBUG_VNET
print_packet((char *)data, len);
+#endif
v3_enqueue(g_inpkt_q, (addr_t)pkt);
struct vnet_if_device * if_dev;
int idx = search_device(dev_name);
-
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 *)(sizeof(struct vnet_if_device));
-
+ if_dev = (struct vnet_if_device *)V3_Malloc(sizeof(struct vnet_if_device));
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 *)(sizeof(struct link_entry));
-
+ struct link_entry * link = (struct link_entry *)V3_Malloc(sizeof(struct link_entry));
link->type = LINK_INTERFACE;
link->dst_dev = if_dev;
idx = __add_link_entry(link);
- PrintDebug("VNET: Add device %s to link table, idx %d", dev_name, idx);
-
return idx;
}
int v3_vnet_pkt_process() {
struct ethernet_pkt * pkt;
- PrintDebug("VNET: In vnet_check\n");
-
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(pkt)) {
- PrintDebug("VNET: vnet_check: handle one packet!\n");
- } else {
- PrintError("VNET: vnet_check: fail to forward one packet, discard it!\n");
- }
+ PrintDebug("VNET: In vnet_check: pt length %d, pt type %d\n", (int)pkt->size, (int)pkt->type);
+
+ if (handle_one_pkt(pkt) != -1) {
+ PrintDebug("VNET: vnet_check: handle one packet!\n");
+ } else {
+ PrintDebug("VNET: vnet_check: Fail to forward one packet, discard it!\n");
+ }
- V3_Free(pkt); // be careful here
+ V3_Free(pkt); // be careful here
}
return 0;
}
-
static void init_empty_link_table() {
int i;
new_route = NULL;
}
-
return 0;
}
struct link_entry *link_array;
struct routing_entry *route_array;
+ PrintDebug("Vnet: In handle_init_tables_hcall\n");
+
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, init_info->routing_table_start, &route_addr) == -1) {
return 0;
}
-
void v3_vnet_init(struct guest_info * vm) {
init_tables();
init_pkt_queue();
