X-Git-Url: http://git.meshlink.io/?a=blobdiff_plain;f=utcp_priv.h;h=24f4158318ddccd8a4a586b72420fbe87de172c2;hb=5150efe030a7d7d603dca25c405ebf6b92ecd623;hp=184e3386bf00e8c3a3addabd1c39bd9086f5d40a;hpb=f60a19752749bf1d28031e78c46f8924325ffcdd;p=utcp

diff --git a/utcp_priv.h b/utcp_priv.h
index 184e338..24f4158 100644
--- a/utcp_priv.h
+++ b/utcp_priv.h
@@ -30,8 +30,18 @@
 #define FIN 4
 #define RST 8
 
+#define NSACKS 4
 #define DEFAULT_SNDBUFSIZE 4096
 #define DEFAULT_MAXSNDBUFSIZE 131072
+#define DEFAULT_RCVBUFSIZE 0
+#define DEFAULT_MAXRCVBUFSIZE 131072
+
+#define DEFAULT_MTU 1000
+
+#define DEFAULT_USER_TIMEOUT 60 // s
+#define CLOCK_GRANULARITY 1000 // us
+#define START_RTO 1000000 // us
+#define MAX_RTO 3000000 // us
 
 struct hdr {
 	uint16_t src; // Source port
@@ -71,6 +81,18 @@ static const char *strstate[] __attribute__((unused)) = {
 	[TIME_WAIT] = "TIME_WAIT"
 };
 
+struct buffer {
+	char *data;
+	uint32_t used;
+	uint32_t size;
+	uint32_t maxsize;
+};
+
+struct sack {
+	uint32_t offset;
+	uint32_t len;
+};
+
 struct utcp_connection {
 	void *priv;
 	struct utcp *utcp;
@@ -80,6 +102,7 @@ struct utcp_connection {
 	// Callbacks
 
 	utcp_recv_t recv;
+	utcp_poll_t poll;
 
 	// TCP State
 
@@ -109,13 +132,14 @@ struct utcp_connection {
 
 	struct timeval conn_timeout;
 	struct timeval rtrx_timeout;
+	struct timeval rtt_start;
+	uint32_t rtt_seq;
 
-	// Send buffer
+	// Buffers
 
-	char *sndbuf;
-	uint32_t sndbufused;
-	uint32_t sndbufsize;
-	uint32_t maxsndbufsize;
+	struct buffer sndbuf;
+	struct buffer rcvbuf;
+	struct sack sacks[NSACKS];
 
 	// Per-socket options
 
@@ -140,7 +164,13 @@ struct utcp {
 	// Global socket options
 
 	uint16_t mtu;
-	int timeout;
+	int timeout; // s
+
+	// RTT variables
+
+	uint32_t srtt; // us
+	uint32_t rttvar; // us
+	uint32_t rto; // us
 
 	// Connection management