Introduce raw TCP SPTPS packet transport.

[tinc] / src / protocol_misc.c

diff --git a/src/protocol_misc.c b/src/protocol_misc.c
index 6fedc08..6e24274 100644 (file)
--- a/src/protocol_misc.c
+++ b/src/protocol_misc.c
@@ -153,6 +153,36 @@ bool tcppacket_h(connection_t *c, const char *request) {
        return true;
 }
 
+bool send_sptps_tcppacket(connection_t *c, const char* packet, int len) {
+       /* If there already is a lot of data in the outbuf buffer, discard this packet.
+          We use a very simple Random Early Drop algorithm. */
+
+       if(2.0 * c->outbuf.len / (float)maxoutbufsize - 1 > (float)rand()/(float)RAND_MAX)
+               return true;
+
+       if(!send_request(c, "%d %hd", SPTPS_PACKET, len))
+               return false;
+
+       send_meta_raw(c, packet, len);
+       return true;
+}
+
+bool sptps_tcppacket_h(connection_t *c, const char* request) {
+       short int len;
+
+       if(sscanf(request, "%*d %hd", &len) != 1) {
+               logger(DEBUG_ALWAYS, LOG_ERR, "Got bad %s from %s (%s)", "SPTPS_PACKET", c->name,
+                          c->hostname);
+               return false;
+       }
+
+       /* Set sptpslen to len, this will tell receive_meta() that a SPTPS packet is coming. */
+
+       c->sptpslen = len;
+
+       return true;
+}
+
 /* Transmitting UDP information */
 
 bool send_udp_info(node_t *from, node_t *to) {