X-Git-Url: https://tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Fprotocol_misc.c;h=95bd322e72487e3ea506f670d64d22f7f11d0a05;hp=6fedc0823b86785224b64a845484ff5c5b4f2ee5;hb=706d855e507980de3845556989d7de7a3b9c76e8;hpb=76a9be5bce43a1a7363c670882f5315c824c903c

diff --git a/src/protocol_misc.c b/src/protocol_misc.c
index 6fedc082..95bd322e 100644
--- a/src/protocol_misc.c
+++ b/src/protocol_misc.c
@@ -30,6 +30,10 @@
 #include "utils.h"
 #include "xalloc.h"
 
+#ifndef MIN
+#define MIN(x, y) (((x)<(y))?(x):(y))
+#endif
+
 int maxoutbufsize = 0;
 int mtu_info_interval = 5;
 int udp_info_interval = 5;
@@ -153,6 +157,36 @@ 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 %d", 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) {