static void forward_ethernet(struct session *session, DNDSMessage_t *msg)
{
uint8_t *frame;
size_t frame_size;
uint8_t macaddr_src[ETHER_ADDR_LEN];
uint8_t macaddr_dst[ETHER_ADDR_LEN];
uint8_t macaddr_dst_type;
struct session *session_dst = NULL;
struct session *session_src = NULL;
struct session *session_list = NULL;
if (session->state != SESSION_STATE_AUTHED)
return;
DNDSMessage_get_ethernet(msg, &frame, &frame_size);
/* New mac address ? Add it to the lookup table */
inet_get_mac_addr_src(frame, macaddr_src);
session_src = ftable_find(session->context->ftable, macaddr_src);
if (session_src == NULL) {
memcpy(session->mac_addr, macaddr_src, ETHER_ADDR_LEN);
ftable_insert(session->context->ftable, macaddr_src, session);
session_src = session;
session_add_mac(session, macaddr_src);
}
/* Lookup the destination */
inet_get_mac_addr_dst(frame, macaddr_dst);
macaddr_dst_type = inet_get_mac_addr_type(macaddr_dst);
session_dst = ftable_find(session->context->ftable, macaddr_dst);
if (session_src != NULL && session_dst != NULL &&
(session_src == session_dst)) {
/* prevent loops */
return;
}
if (macaddr_dst_type == ADDR_MULTICAST) {
/* Multicast is not supported yet */
return;
}
/* Switch forwarding */
if (macaddr_dst_type == ADDR_UNICAST /* The destination address is unicast */
&& session_dst != NULL
&& session_dst->netc != NULL) { /* AND the session is up */
/*jlog(L_DEBUG, "forwarding the packet to [%s]", session_dst->ip);*/
net_send_msg(session_dst->netc, msg);
int lnk_state = 0;
lnk_state = linkst_joined(session_src->context->linkst, session_src->id, session_dst->id);
if (lnk_state != 1) {
p2pRequest(session_src, session_dst);
linkst_join(session_src->context->linkst, session_src->id, session_dst->id);
}
/* Switch flooding */
} else if (macaddr_dst_type == ADDR_BROADCAST || /* This packet has to be broadcasted */
session_dst == NULL) { /* OR the fib session is down */
session_list = session->context->session_list;
while (session_list != NULL) {
net_send_msg(session_list->netc, msg);
/*jlog(L_DEBUG, "flooding the packet to [%s]", session_list->ip);*/
session_list = session_list->next;
}
} else {
jlog(L_WARNING, "unknown packet");
}
}
int main()
{
int init_matrix_size = 1;
linkst_t *linkst = NULL;
/* there is 4 active nodee */
int idx_a, idx_b, idx_c, idx_d;
idx_a = 1;
idx_b = 2;
idx_c = 3;
idx_d = 100;
linkst = linkst_new(100, 3);
linkst_join(linkst, idx_a, idx_b);
if (linkst_joined(linkst, idx_a, idx_b) != 1) {
printf("%d // %d\n", idx_a, idx_b);
goto out;
}
linkst_join(linkst, idx_a, idx_d);
if (linkst_joined(linkst, idx_a, idx_d) != 1) {
printf("%d // %d\n", idx_a, idx_d);
goto out;
}
int state;
int i = 4;
while (i--) {
state = linkst_joined(linkst, idx_a, idx_b);
printf("state [%d] || [%d] %s [%d]\n", state, idx_a, state == 1 ? "<==>": "//", idx_b);
state = linkst_joined(linkst, idx_a, idx_c);
printf("state [%d] || [%d] %s [%d]\n", state, idx_a, state == 1 ? "<==>": "//", idx_c);
printf("\n\n");
sleep(1);
}
printf("out of loop\n");
linkst_join(linkst, idx_a, idx_b);
linkst_join(linkst, idx_a, idx_d);
linkst_disjoin(linkst, idx_a);
state = linkst_joined(linkst, idx_a, idx_b);
printf("state [%d] || [%d] %s [%d]\n", state, idx_a, state == 1 ? "<==>": "//", idx_b);
state = linkst_joined(linkst, idx_a, idx_c);
printf("state [%d] || [%d] %s [%d]\n", state, idx_a, state == 1 ? "<==>": "//", idx_c);
printf("\n\n");
out:
linkst_free(linkst);
}
