static void send_udppacket(meshlink_handle_t *mesh, node_t *, vpn_packet_t *);
-unsigned replaywin = 16;
-
#define MAX_SEQNO 1073741824
/* mtuprobes == 1..30: initial discovery, send bursts with 1 second interval
if(n->mtuprobes == 31) {
timeout = mesh->pinginterval;
goto end;
- } else if(n->mtuprobes == 32) {
+ } else if(n->mtuprobes == 32)
timeout = mesh->pingtimeout;
- }
for(int i = 0; i < 4 + mesh->localdiscovery; i++) {
int len;
if(n->mtuprobes < 30 || n->maxmtu + 8 >= MTU)
continue;
len = n->maxmtu + 8;
- } else if(n->maxmtu <= n->minmtu) {
+ } else if(n->maxmtu <= n->minmtu)
len = n->maxmtu;
- } else {
+ else
len = n->minmtu + 1 + rand() % (n->maxmtu - n->minmtu);
- }
if(len < 64)
len = 64;
packet.len = len;
n->status.broadcast = i >= 4 && n->mtuprobes <= 10 && n->prevedge;
- logger(mesh, MESHLINK_INFO, "Sending MTU probe length %d to %s (%s)", len, n->name, n->hostname);
+ logger(mesh, MESHLINK_DEBUG, "Sending MTU probe length %d to %s (%s)", len, n->name, n->hostname);
send_udppacket(mesh, n, &packet);
}
n->status.broadcast = false;
- n->probe_counter = 0;
- gettimeofday(&n->probe_time, NULL);
-
- /* Calculate the packet loss of incoming traffic by comparing the rate of
- packets received to the rate with which the sequence number has increased.
- */
-
- if(n->received > n->prev_received)
- n->packetloss = 1.0 - (n->received - n->prev_received) / (float)(n->received_seqno - n->prev_received_seqno);
- else
- n->packetloss = n->received_seqno <= n->prev_received_seqno;
-
- n->prev_received_seqno = n->received_seqno;
- n->prev_received = n->received;
end:
- timeout_set(&mesh->loop, &n->mtutimeout, &(struct timeval){timeout, rand() % 100000});
+ timeout_set(&mesh->loop, &n->mtutimeout, &(struct timeval) {
+ timeout, rand() % 100000
+ });
}
void send_mtu_probe(meshlink_handle_t *mesh, node_t *n) {
- timeout_add(&mesh->loop, &n->mtutimeout, send_mtu_probe_handler, n, &(struct timeval){1, 0});
+ timeout_add(&mesh->loop, &n->mtutimeout, send_mtu_probe_handler, n, &(struct timeval) {
+ 1, 0
+ });
send_mtu_probe_handler(&mesh->loop, n);
}
static void mtu_probe_h(meshlink_handle_t *mesh, node_t *n, vpn_packet_t *packet, uint16_t len) {
- logger(mesh, MESHLINK_INFO, "Got MTU probe length %d from %s (%s)", packet->len, n->name, n->hostname);
+ logger(mesh, MESHLINK_DEBUG, "Got MTU probe length %d from %s (%s)", packet->len, n->name, n->hostname);
if(!packet->data[0]) {
/* It's a probe request, send back a reply */
/* If we haven't established the PMTU yet, restart the discovery process. */
if(n->mtuprobes > 30) {
- if (len == n->maxmtu + 8) {
+ if(len == n->maxmtu + 8) {
logger(mesh, MESHLINK_INFO, "Increase in PMTU to %s (%s) detected, restarting PMTU discovery", n->name, n->hostname);
n->maxmtu = MTU;
n->mtuprobes = 10;
len = n->maxmtu;
if(n->minmtu < len)
n->minmtu = len;
-
- /* Calculate RTT and bandwidth.
- The RTT is the time between the MTU probe burst was sent and the first
- reply is received. The bandwidth is measured using the time between the
- arrival of the first and third probe reply.
- */
-
- struct timeval now, diff;
- gettimeofday(&now, NULL);
- timersub(&now, &n->probe_time, &diff);
-
- n->probe_counter++;
-
- if(n->probe_counter == 1) {
- n->rtt = diff.tv_sec + diff.tv_usec * 1e-6;
- n->probe_time = now;
- } else if(n->probe_counter == 3) {
- n->bandwidth = 2.0 * len / (diff.tv_sec + diff.tv_usec * 1e-6);
- logger(mesh, MESHLINK_DEBUG, "%s (%s) RTT %.2f ms, burst bandwidth %.3f Mbit/s, rx packet loss %.2f %%", n->name, n->hostname, n->rtt * 1e3, n->bandwidth * 8e-6, n->packetloss * 1e2);
- }
}
}
static uint16_t compress_packet(uint8_t *dest, const uint8_t *source, uint16_t len, int level) {
- if(level == 0) {
- memcpy(dest, source, len);
- return len;
- } else if(level == 10) {
- return -1;
- } else if(level < 10) {
-#ifdef HAVE_ZLIB
- unsigned long destlen = MAXSIZE;
- if(compress2(dest, &destlen, source, len, level) == Z_OK)
- return destlen;
- else
-#endif
- return -1;
- } else {
- return -1;
- }
-
- return -1;
+ abort();
}
static uint16_t uncompress_packet(uint8_t *dest, const uint8_t *source, uint16_t len, int level) {
- if(level == 0) {
- memcpy(dest, source, len);
- return len;
- } else if(level > 9) {
- return -1;
- }
-#ifdef HAVE_ZLIB
- else {
- unsigned long destlen = MAXSIZE;
- if(uncompress(dest, &destlen, source, len) == Z_OK)
- return destlen;
- else
- return -1;
- }
-#endif
-
- return -1;
+ abort();
}
/* VPN packet I/O */
static void receive_packet(meshlink_handle_t *mesh, node_t *n, vpn_packet_t *packet) {
logger(mesh, MESHLINK_DEBUG, "Received packet of %d bytes from %s (%s)",
- packet->len, n->name, n->hostname);
+ packet->len, n->name, n->hostname);
- if (n->status.blacklisted) {
- logger(mesh, MESHLINK_WARNING, "Dropping packet from blacklisted node %s", n->name);
- } else {
- n->in_packets++;
- n->in_bytes += packet->len;
+ if(n->status.blacklisted)
+ logger(mesh, MESHLINK_WARNING, "Dropping packet from blacklisted node %s", n->name);
+ else {
+ n->in_packets++;
+ n->in_bytes += packet->len;
- route(mesh, n, packet);
- }
+ route(mesh, n, packet);
+ }
}
static bool try_mac(meshlink_handle_t *mesh, node_t *n, const vpn_packet_t *inpkt) {
if(!n->status.waitingforkey) {
logger(mesh, MESHLINK_DEBUG, "Got packet from %s (%s) but we haven't exchanged keys yet", n->name, n->hostname);
send_req_key(mesh, n);
- } else {
+ } else
logger(mesh, MESHLINK_DEBUG, "Got packet from %s (%s) but he hasn't got our key yet", n->name, n->hostname);
- }
return;
}
sptps_receive_data(&n->sptps, inpkt->data, inpkt->len);
if(n->outcompression) {
int len = compress_packet(outpkt.data, origpkt->data, origpkt->len, n->outcompression);
- if(len < 0) {
+ if(len < 0)
logger(mesh, MESHLINK_ERROR, "Error while compressing packet to %s (%s)", n->name, n->hostname);
- } else if(len < origpkt->len) {
+ else if(len < origpkt->len) {
outpkt.len = len;
origpkt = &outpkt;
type |= PKT_COMPRESSED;
if(!to->status.validkey) {
to->incompression = mesh->self->incompression;
return send_request(mesh, to->nexthop->connection, "%d %s %s %s -1 -1 -1 %d", ANS_KEY, mesh->self->name, to->name, buf, to->incompression);
- } else {
+ } else
return send_request(mesh, to->nexthop->connection, "%d %s %s %d %s", REQ_KEY, mesh->self->name, to->name, REQ_SPTPS, buf);
- }
}
/* Otherwise, send the packet via UDP */
memcpy(inpkt.data, data, len);
mtu_probe_h(mesh, from, &inpkt, len);
return true;
- } else {
+ } else
inpkt.probe = false;
- }
if(type & ~(PKT_COMPRESSED)) {
logger(mesh, MESHLINK_ERROR, "Unexpected SPTPS record type %d len %d from %s (%s)", type, len, from->name, from->hostname);
if(type & PKT_COMPRESSED) {
uint16_t ulen = uncompress_packet(inpkt.data, (const uint8_t *)data, len, from->incompression);
- if(ulen < 0) {
+ if(ulen < 0)
return false;
- } else {
+ else
inpkt.len = ulen;
- }
if(inpkt.len > MAXSIZE)
abort();
} else {
}
logger(mesh, MESHLINK_DEBUG, "Sending packet of %d bytes to %s (%s)",
- packet->len, n->name, n->hostname);
+ packet->len, n->name, n->hostname);
if(!n->status.reachable) {
logger(mesh, MESHLINK_WARNING, "Node %s (%s) is not reachable",
- n->name, n->hostname);
+ n->name, n->hostname);
return;
}
send_packet(mesh, mesh->self, packet);
logger(mesh, MESHLINK_INFO, "Broadcasting packet of %d bytes from %s (%s)",
- packet->len, from->name, from->hostname);
+ packet->len, from->name, from->hostname);
for list_each(connection_t, c, mesh->connections)
if(c->status.active && c->status.mst && c != from->nexthop->connection)
logger(mesh, MESHLINK_WARNING, "Received UDP packet from unknown source %s", hostname);
free(hostname);
return;
- }
- else
+ } else
return;
}
- if (n->status.blacklisted) {
- logger(mesh, MESHLINK_WARNING, "Dropping packet from blacklisted node %s", n->name);
- return;
- }
+ if(n->status.blacklisted) {
+ logger(mesh, MESHLINK_WARNING, "Dropping packet from blacklisted node %s", n->name);
+ return;
+ }
n->sock = ls - mesh->listen_socket;
receive_udppacket(mesh, n, &pkt);
projects / meshlink / blobdiff