mirror of
https://github.com/ntop/n2n.git
synced 2024-09-19 16:41:11 +02:00
Initial work for local multicast registering (work in progress)
This commit is contained in:
parent
fd356cde64
commit
dd899b3a4d
39
edge.c
39
edge.c
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@ -324,11 +324,9 @@ static int setOption(int optkey, char *optargument, edge_conf_t *ec, n2n_edge_t
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}
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case 'v': /* verbose */
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{
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++traceLevel; /* do 2 -v flags to increase verbosity to DEBUG level*/
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break;
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}
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traceLevel = 4; /* DEBUG */
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break;
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default:
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{
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traceEvent(TRACE_WARNING, "Unknown option -%c: Ignored.", (char)optkey);
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@ -679,19 +677,44 @@ int main(int argc, char* argv[]) {
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}
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/* else run in NULL mode */
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/* Populate the multicast group for local edge */
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eee.multicast_peer.family = AF_INET;
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eee.multicast_peer.port = N2N_MULTICAST_PORT;
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eee.multicast_peer.addr.v4[0] = 224; /* N2N_MULTICAST_GROUP */
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eee.multicast_peer.addr.v4[1] = 0;
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eee.multicast_peer.addr.v4[2] = 0;
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eee.multicast_peer.addr.v4[3] = 68;
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eee.udp_sock = open_socket(ec.local_port, 1 /* bind ANY */);
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if(eee.udp_sock < 0) {
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traceEvent(TRACE_ERROR, "Failed to bind main UDP port %u", (signed int)ec.local_port);
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return(-1);
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}
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eee.udp_mgmt_sock = open_socket(ec.mgmt_port, 0 /* bind LOOPBACK */);
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eee.udp_mgmt_sock = open_socket(eee.multicast_peer.port, 0 /* bind LOOPBACK */);
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if(eee.udp_mgmt_sock < 0) {
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traceEvent(TRACE_ERROR, "Failed to bind management UDP port %u", ec.mgmt_port);
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return(-1);
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} else {
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}
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eee.udp_multicast_sock = open_socket(N2N_MULTICAST_PORT, 1 /* bind ANY */);
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if(eee.udp_multicast_sock < 0)
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return(-5);
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else {
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/* Bind eee.udp_multicast_sock to multicast group */
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struct ip_mreq mreq;
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mreq.imr_multiaddr.s_addr = inet_addr(N2N_MULTICAST_GROUP);
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mreq.imr_interface.s_addr = htonl(INADDR_ANY);
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if (setsockopt(eee.udp_multicast_sock, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof(mreq)) < 0) {
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traceEvent(TRACE_ERROR, "Failed to bind to local multicast group %s:%u",
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N2N_MULTICAST_GROUP, N2N_MULTICAST_PORT);
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return(-6);
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}
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}
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traceEvent(TRACE_NORMAL, "edge started");
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update_supernode_reg(&eee, time(NULL));
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288
edge_utils.c
288
edge_utils.c
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@ -77,6 +77,7 @@ int edge_init(n2n_edge_t * eee) {
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eee->null_transop = 0;
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eee->udp_sock = -1;
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eee->udp_mgmt_sock = -1;
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eee->udp_multicast_sock = -1;
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eee->dyn_ip_mode = 0;
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eee->allow_routing = 0;
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eee->drop_multicast = 1;
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@ -177,36 +178,38 @@ void supernode2addr(n2n_sock_t * sn, const n2n_sn_name_t addrIn) {
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static void try_send_register(n2n_edge_t * eee,
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uint8_t from_supernode,
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const n2n_mac_t mac,
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const n2n_sock_t * peer)
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{
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const n2n_sock_t * peer) {
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/* REVISIT: purge of pending_peers not yet done. */
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struct peer_info * scan = find_peer_by_mac(eee->pending_peers, mac);
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macstr_t mac_buf;
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n2n_sock_str_t sockbuf;
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if(NULL == scan)
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{
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scan = calloc(1, sizeof(struct peer_info));
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if(scan == NULL) {
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scan = calloc(1, sizeof(struct peer_info));
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memcpy(scan->mac_addr, mac, N2N_MAC_SIZE);
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scan->sock = *peer;
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scan->last_seen = time(NULL); /* Don't change this it marks the pending peer for removal. */
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memcpy(scan->mac_addr, mac, N2N_MAC_SIZE);
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scan->sock = *peer;
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scan->last_seen = time(NULL); /* Don't change this it marks the pending peer for removal. */
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peer_list_add(&(eee->pending_peers), scan);
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peer_list_add(&(eee->pending_peers), scan);
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traceEvent(TRACE_DEBUG, "=== new pending %s -> %s",
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macaddr_str(mac_buf, scan->mac_addr),
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sock_to_cstr(sockbuf, &(scan->sock)));
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traceEvent(TRACE_DEBUG, "=== new pending %s -> %s",
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macaddr_str(mac_buf, scan->mac_addr),
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sock_to_cstr(sockbuf, &(scan->sock)));
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traceEvent(TRACE_INFO, "Pending peers list size=%u",
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(unsigned int)peer_list_size(eee->pending_peers));
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traceEvent(TRACE_INFO, "Pending peers list size=%u",
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(unsigned int)peer_list_size(eee->pending_peers));
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/* trace Sending REGISTER */
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/* trace Sending REGISTER */
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send_register(eee, &(scan->sock));
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send_register(eee, &(scan->sock));
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/* pending_peers now owns scan. */
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} else {
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/* no send registration to the local multicast group */
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traceEvent(TRACE_INFO, "Registering with multicast group %s:%u",
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N2N_MULTICAST_GROUP, N2N_MULTICAST_PORT);
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send_register(eee, &(eee->multicast_peer));
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/* pending_peers now owns scan. */
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}
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}
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@ -218,17 +221,14 @@ void check_peer(n2n_edge_t * eee,
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const n2n_mac_t mac,
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const n2n_sock_t * peer) {
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struct peer_info * scan = find_peer_by_mac(eee->known_peers, mac);
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if(NULL == scan)
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{
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/* Not in known_peers - start the REGISTER process. */
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try_send_register(eee, from_supernode, mac, peer);
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}
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else
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{
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/* Already in known_peers. */
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update_peer_address(eee, from_supernode, mac, peer, time(NULL));
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}
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if(NULL == scan) {
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/* Not in known_peers - start the REGISTER process. */
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try_send_register(eee, from_supernode, mac, peer);
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} else {
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/* Already in known_peers. */
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update_peer_address(eee, from_supernode, mac, peer, time(NULL));
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}
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}
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/* ************************************** */
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@ -470,9 +470,7 @@ static void send_register_super(n2n_edge_t * eee,
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memcpy(cmn.community, eee->community_name, N2N_COMMUNITY_SIZE);
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for(idx=0; idx < N2N_COOKIE_SIZE; ++idx)
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{
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eee->last_cookie[idx] = rand() % 0xff;
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}
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eee->last_cookie[idx] = rand() % 0xff;
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memcpy(reg.cookie, eee->last_cookie, N2N_COOKIE_SIZE);
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reg.auth.scheme=0; /* No auth yet */
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@ -564,41 +562,31 @@ static void send_register_ack(n2n_edge_t * eee,
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* This is frequently called by the main loop.
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*/
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void update_supernode_reg(n2n_edge_t * eee, time_t nowTime) {
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if(eee->sn_wait && (nowTime > (eee->last_register_req + (eee->register_lifetime/10))))
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{
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/* fall through */
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traceEvent(TRACE_DEBUG, "update_supernode_reg: doing fast retry.");
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}
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else if(nowTime < (eee->last_register_req + eee->register_lifetime))
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{
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return; /* Too early */
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if(eee->sn_wait && (nowTime > (eee->last_register_req + (eee->register_lifetime/10)))) {
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/* fall through */
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traceEvent(TRACE_DEBUG, "update_supernode_reg: doing fast retry.");
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} else if(nowTime < (eee->last_register_req + eee->register_lifetime))
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return; /* Too early */
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if(0 == eee->sup_attempts) {
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/* Give up on that supernode and try the next one. */
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++(eee->sn_idx);
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if (eee->sn_idx >= eee->sn_num) {
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/* Got to end of list, go back to the start. Also works for list of one entry. */
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eee->sn_idx=0;
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}
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if(0 == eee->sup_attempts)
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{
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/* Give up on that supernode and try the next one. */
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++(eee->sn_idx);
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traceEvent(TRACE_WARNING, "Supernode not responding - moving to %u of %u",
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(unsigned int)eee->sn_idx, (unsigned int)eee->sn_num);
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if (eee->sn_idx >= eee->sn_num)
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{
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/* Got to end of list, go back to the start. Also works for list of one entry. */
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eee->sn_idx=0;
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}
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traceEvent(TRACE_WARNING, "Supernode not responding - moving to %u of %u",
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(unsigned int)eee->sn_idx, (unsigned int)eee->sn_num);
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eee->sup_attempts = N2N_EDGE_SUP_ATTEMPTS;
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}
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eee->sup_attempts = N2N_EDGE_SUP_ATTEMPTS;
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}
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else
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{
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--(eee->sup_attempts);
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}
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--(eee->sup_attempts);
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if(eee->re_resolve_supernode_ip || (eee->sn_num > 1))
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{
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supernode2addr(&(eee->supernode), eee->sn_ip_array[eee->sn_idx]);
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}
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supernode2addr(&(eee->supernode), eee->sn_ip_array[eee->sn_idx]);
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traceEvent(TRACE_DEBUG, "Registering with supernode (%s) (attempts left %u)",
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supernode_ip(eee), (unsigned int)eee->sup_attempts);
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now = time(NULL);
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i = sizeof(sender_sock);
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recvlen=recvfrom(eee->udp_mgmt_sock, udp_buf, N2N_PKT_BUF_SIZE, 0/*flags*/,
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(struct sockaddr *)&sender_sock, (socklen_t*)&i);
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recvlen = recvfrom(eee->udp_mgmt_sock, udp_buf, N2N_PKT_BUF_SIZE, 0/*flags*/,
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(struct sockaddr *)&sender_sock, (socklen_t*)&i);
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if(recvlen < 0)
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{
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@ -1159,15 +1147,15 @@ static void readFromTAPSocket(n2n_edge_t * eee) {
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ssize_t len;
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#ifdef __ANDROID_NDK__
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if (uip_arp_len != 0) {
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len = uip_arp_len;
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memcpy(eth_pkt, uip_arp_buf, MIN(uip_arp_len, N2N_PKT_BUF_SIZE));
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traceEvent(TRACE_DEBUG, "ARP reply packet to send");
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}
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else
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if (uip_arp_len != 0) {
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len = uip_arp_len;
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memcpy(eth_pkt, uip_arp_buf, MIN(uip_arp_len, N2N_PKT_BUF_SIZE));
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traceEvent(TRACE_DEBUG, "ARP reply packet to send");
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}
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else
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{
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#endif /* #ifdef __ANDROID_NDK__ */
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len = tuntap_read( &(eee->device), eth_pkt, N2N_PKT_BUF_SIZE );
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len = tuntap_read( &(eee->device), eth_pkt, N2N_PKT_BUF_SIZE );
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#ifdef __ANDROID_NDK__
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}
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#endif /* #ifdef __ANDROID_NDK__ */
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@ -1230,7 +1218,7 @@ static void startTunReadThread(n2n_edge_t *eee) {
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/* ************************************** */
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/** Read a datagram from the main UDP socket to the internet. */
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static void readFromIPSocket(n2n_edge_t * eee) {
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static void readFromIPSocket(n2n_edge_t * eee, int in_sock) {
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n2n_common_t cmn; /* common fields in the packet header */
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n2n_sock_str_t sockbuf1;
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@ -1252,19 +1240,18 @@ static void readFromIPSocket(n2n_edge_t * eee) {
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size_t i;
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i = sizeof(sender_sock);
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recvlen=recvfrom(eee->udp_sock, udp_buf, N2N_PKT_BUF_SIZE, 0/*flags*/,
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(struct sockaddr *)&sender_sock, (socklen_t*)&i);
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recvlen = recvfrom(in_sock, udp_buf, N2N_PKT_BUF_SIZE, 0/*flags*/,
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(struct sockaddr *)&sender_sock, (socklen_t*)&i);
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if(recvlen < 0)
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{
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traceEvent(TRACE_ERROR, "recvfrom failed with %s", strerror(errno));
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return; /* failed to receive data from UDP */
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}
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if(recvlen < 0) {
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traceEvent(TRACE_ERROR, "recvfrom failed with %s", strerror(errno));
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return; /* failed to receive data from UDP */
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}
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/* REVISIT: when UDP/IPv6 is supported we will need a flag to indicate which
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* IP transport version the packet arrived on. May need to UDP sockets. */
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sender.family = AF_INET; /* udp_sock was opened PF_INET v4 */
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sender.family = AF_INET; /* UDP socket was opened PF_INET v4 */
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sender.port = ntohs(sender_sock.sin_port);
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memcpy(&(sender.addr.v4), &(sender_sock.sin_addr.s_addr), IPV4_SIZE);
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@ -1343,9 +1330,7 @@ static void readFromIPSocket(n2n_edge_t * eee) {
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decode_REGISTER_ACK(&ra, &cmn, udp_buf, &rem, &idx);
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if(ra.sock.family)
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{
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orig_sender = &(ra.sock);
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}
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orig_sender = &(ra.sock);
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traceEvent(TRACE_INFO, "Rx REGISTER_ACK src=%s dst=%s from peer %s (%s)",
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macaddr_str(mac_buf1, ra.srcMac),
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@ -1422,7 +1407,7 @@ int run_edge_loop(n2n_edge_t * eee, int *keep_running) {
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time_t lastIfaceCheck=0;
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time_t lastTransop=0;
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#ifdef __ANDROID_NDK__
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time_t lastArpPeriod=0;
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time_t lastArpPeriod=0;
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#endif
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#ifdef WIN32
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@ -1448,6 +1433,9 @@ int run_edge_loop(n2n_edge_t * eee, int *keep_running) {
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FD_SET(eee->udp_sock, &socket_mask);
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FD_SET(eee->udp_mgmt_sock, &socket_mask);
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max_sock = max(eee->udp_sock, eee->udp_mgmt_sock);
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FD_SET(eee->udp_multicast_sock, &socket_mask);
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max_sock = max(eee->udp_sock, eee->udp_multicast_sock);
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#ifndef WIN32
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FD_SET(eee->device.fd, &socket_mask);
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max_sock = max(max_sock, eee->device.fd);
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@ -1459,49 +1447,51 @@ int run_edge_loop(n2n_edge_t * eee, int *keep_running) {
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nowTime=time(NULL);
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/* Make sure ciphers are updated before the packet is treated. */
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if((nowTime - lastTransop) > TRANSOP_TICK_INTERVAL)
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{
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lastTransop = nowTime;
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if((nowTime - lastTransop) > TRANSOP_TICK_INTERVAL) {
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lastTransop = nowTime;
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n2n_tick_transop(eee, nowTime);
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}
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if(rc > 0) {
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/* Any or all of the FDs could have input; check them all. */
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n2n_tick_transop(eee, nowTime);
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if(FD_ISSET(eee->udp_sock, &socket_mask)) {
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/* Read a cooked socket from the internet socket (unicast). Writes on the TAP
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* socket. */
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readFromIPSocket(eee, eee->udp_sock);
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}
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if(rc > 0)
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{
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/* Any or all of the FDs could have input; check them all. */
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if(FD_ISSET(eee->udp_sock, &socket_mask))
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{
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/* Read a cooked socket from the internet socket. Writes on the TAP
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* socket. */
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readFromIPSocket(eee);
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}
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if(FD_ISSET(eee->udp_multicast_sock, &socket_mask)) {
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/* Read a cooked socket from the internet socket (multicast). Writes on the TAP
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* socket. */
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traceEvent(TRACE_WARNING, "**** Received packet from multicast socket ****");
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readFromIPSocket(eee, eee->udp_multicast_sock);
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}
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#ifdef __ANDROID_NDK__
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if (uip_arp_len != 0) {
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readFromTAPSocket(eee);
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uip_arp_len = 0;
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}
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if (uip_arp_len != 0) {
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readFromTAPSocket(eee);
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uip_arp_len = 0;
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}
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#endif /* #ifdef __ANDROID_NDK__ */
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if(FD_ISSET(eee->udp_mgmt_sock, &socket_mask)) {
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/* Read a cooked socket from the internet socket. Writes on the TAP
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* socket. */
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readFromMgmtSocket(eee, keep_running);
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}
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#ifndef WIN32
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if(FD_ISSET(eee->device.fd, &socket_mask)) {
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/* Read an ethernet frame from the TAP socket. Write on the IP
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* socket. */
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readFromTAPSocket(eee);
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}
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#endif
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if(FD_ISSET(eee->udp_mgmt_sock, &socket_mask)) {
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/* Read a cooked socket from the internet socket. Writes on the TAP
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* socket. */
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readFromMgmtSocket(eee, keep_running);
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}
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#ifndef WIN32
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if(FD_ISSET(eee->device.fd, &socket_mask)) {
|
||||
/* Read an ethernet frame from the TAP socket. Write on the IP
|
||||
* socket. */
|
||||
readFromTAPSocket(eee);
|
||||
}
|
||||
#endif
|
||||
}
|
||||
|
||||
/* Finished processing select data. */
|
||||
|
||||
|
||||
update_supernode_reg(eee, nowTime);
|
||||
|
||||
numPurged = purge_expired_registrations(&(eee->known_peers));
|
||||
|
@ -1521,10 +1511,10 @@ int run_edge_loop(n2n_edge_t * eee, int *keep_running) {
|
|||
}
|
||||
|
||||
#ifdef __ANDROID_NDK__
|
||||
if ((nowTime - lastArpPeriod) > ARP_PERIOD_INTERVAL) {
|
||||
uip_arp_timer();
|
||||
lastArpPeriod = nowTime;
|
||||
}
|
||||
if ((nowTime - lastArpPeriod) > ARP_PERIOD_INTERVAL) {
|
||||
uip_arp_timer();
|
||||
lastArpPeriod = nowTime;
|
||||
}
|
||||
#endif /* #ifdef __ANDROID_NDK__ */
|
||||
} /* while */
|
||||
|
||||
|
@ -1592,11 +1582,9 @@ int edge_init_keyschedule(n2n_edge_t * eee) {
|
|||
|
||||
n2n_tick_transop(eee, now);
|
||||
}
|
||||
else
|
||||
{
|
||||
traceEvent(TRACE_ERROR, "Failed to process '%s'", eee->keyschedule);
|
||||
}
|
||||
|
||||
else
|
||||
traceEvent(TRACE_ERROR, "Failed to process '%s'", eee->keyschedule);
|
||||
|
||||
return retval;
|
||||
}
|
||||
|
||||
|
@ -1610,6 +1598,9 @@ void edge_term(n2n_edge_t * eee) {
|
|||
if(eee->udp_mgmt_sock >= 0)
|
||||
closesocket(eee->udp_mgmt_sock);
|
||||
|
||||
if(eee->udp_multicast_sock >= 0)
|
||||
closesocket(eee->udp_multicast_sock);
|
||||
|
||||
clear_peer_list(&(eee->pending_peers));
|
||||
clear_peer_list(&(eee->known_peers));
|
||||
|
||||
|
@ -1621,26 +1612,26 @@ void edge_term(n2n_edge_t * eee) {
|
|||
|
||||
const char *random_device_mac(void)
|
||||
{
|
||||
const char key[] = "0123456789abcdef";
|
||||
static char mac[18];
|
||||
int i;
|
||||
const char key[] = "0123456789abcdef";
|
||||
static char mac[18];
|
||||
int i;
|
||||
|
||||
srand(getpid());
|
||||
for (i = 0; i < sizeof(mac) - 1; ++i) {
|
||||
if ((i + 1) % 3 == 0) {
|
||||
mac[i] = ':';
|
||||
continue;
|
||||
}
|
||||
srand(getpid());
|
||||
for (i = 0; i < sizeof(mac) - 1; ++i) {
|
||||
if ((i + 1) % 3 == 0) {
|
||||
mac[i] = ':';
|
||||
continue;
|
||||
}
|
||||
#ifdef WIN32
|
||||
#define random() rand()
|
||||
#endif
|
||||
mac[i] = key[random() % sizeof(key)];
|
||||
mac[i] = key[random() % sizeof(key)];
|
||||
#ifdef WIN32
|
||||
#undef random()
|
||||
#endif
|
||||
}
|
||||
mac[sizeof(mac) - 1] = '\0';
|
||||
return mac;
|
||||
}
|
||||
mac[sizeof(mac) - 1] = '\0';
|
||||
return mac;
|
||||
}
|
||||
|
||||
/* ************************************** */
|
||||
|
@ -1669,11 +1660,26 @@ int quick_edge_init(char *device_name, char *community_name,
|
|||
if(eee.udp_sock < 0)
|
||||
return(-3);
|
||||
|
||||
eee.udp_mgmt_sock = open_socket(0 /* any port */, 0 /* bind LOOPBACK */);
|
||||
|
||||
eee.udp_mgmt_sock = open_socket(0 /* any port */, 0 /* bind LOOPBACK */);
|
||||
if(eee.udp_mgmt_sock < 0)
|
||||
return(-4);
|
||||
|
||||
eee.udp_multicast_sock = open_socket(N2N_MULTICAST_PORT, 1 /* bind ANY */);
|
||||
if(eee.udp_multicast_sock < 0)
|
||||
return(-5);
|
||||
else {
|
||||
/* Bind eee.udp_multicast_sock to multicast group */
|
||||
struct ip_mreq mreq;
|
||||
|
||||
mreq.imr_multiaddr.s_addr = inet_addr(N2N_MULTICAST_GROUP);
|
||||
mreq.imr_interface.s_addr = htonl(INADDR_ANY);
|
||||
if (setsockopt(eee.udp_multicast_sock, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof(mreq)) < 0) {
|
||||
traceEvent(TRACE_ERROR, "Failed to bind to local multicast group %s:%u",
|
||||
N2N_MULTICAST_GROUP, N2N_MULTICAST_PORT);
|
||||
return(-6);
|
||||
}
|
||||
}
|
||||
|
||||
update_supernode_reg(&eee, time(NULL));
|
||||
|
||||
return(run_edge_loop(&eee, keep_on_running));
|
||||
|
|
1
n2n.c
1
n2n.c
|
@ -58,6 +58,7 @@ SOCKET open_socket(int local_port, int bind_any) {
|
|||
local_address.sin_family = AF_INET;
|
||||
local_address.sin_port = htons(local_port);
|
||||
local_address.sin_addr.s_addr = htonl(bind_any ? INADDR_ANY : INADDR_LOOPBACK);
|
||||
|
||||
if(bind(sock_fd,(struct sockaddr*) &local_address, sizeof(local_address)) == -1) {
|
||||
traceEvent(TRACE_ERROR, "Bind error on local port %u [%s]\n", local_port, strerror(errno));
|
||||
return(-1);
|
||||
|
|
3
n2n.h
3
n2n.h
|
@ -199,6 +199,7 @@ struct n2n_edge {
|
|||
|
||||
int udp_sock;
|
||||
int udp_mgmt_sock; /**< socket for status info. */
|
||||
int udp_multicast_sock; /**< socket for local multicast registrations. */
|
||||
|
||||
tuntap_dev device; /**< All about the TUNTAP device */
|
||||
int dyn_ip_mode; /**< Interface IP address is dynamically allocated, eg. DHCP. */
|
||||
|
@ -207,7 +208,7 @@ struct n2n_edge {
|
|||
|
||||
n2n_trans_op_t transop[N2N_MAX_TRANSFORMS]; /* one for each transform at fixed positions */
|
||||
size_t tx_transop_idx; /**< The transop to use when encoding. */
|
||||
|
||||
n2n_sock_t multicast_peer; /**< Multicast peer group (for local edges) */
|
||||
struct peer_info * known_peers; /**< Edges we are connected to. */
|
||||
struct peer_info * pending_peers; /**< Edges we have tried to register with. */
|
||||
time_t last_register_req; /**< Check if time to re-register with super*/
|
||||
|
|
|
@ -42,6 +42,9 @@
|
|||
#define N2N_PKT_BUF_SIZE 2048
|
||||
#define N2N_SOCKBUF_SIZE 64 /* string representation of INET or INET6 sockets */
|
||||
|
||||
#define N2N_MULTICAST_PORT 1968
|
||||
#define N2N_MULTICAST_GROUP "224.0.0.68"
|
||||
|
||||
typedef uint8_t n2n_community_t[N2N_COMMUNITY_SIZE];
|
||||
typedef uint8_t n2n_mac_t[N2N_MAC_SIZE];
|
||||
typedef uint8_t n2n_cookie_t[N2N_COOKIE_SIZE];
|
||||
|
|
Loading…
Reference in New Issue
Block a user