X-Git-Url: http://git.meshlink.io/?a=blobdiff_plain;f=utcp_priv.h;h=de942a8968ae61ef27592126244ad935dcfe5475;hb=1cd490633b3975e51163a96eadfa9b7490dc93a0;hp=d8f65546dcd810f9d6fe33259dbda4578e5a89b9;hpb=f4c52312544ee99bcce46ebcfc0c8e6ac6356fd5;p=utcp

diff --git a/utcp_priv.h b/utcp_priv.h
index d8f6554..de942a8 100644
--- a/utcp_priv.h
+++ b/utcp_priv.h
@@ -30,8 +30,24 @@
 #define FIN 4
 #define RST 8
 
+#define AUX_INIT 1
+#define AUX_FRAME 2
+#define AUX_SAK 3
+#define AUX_TIMESTAMP 4
+
+#define NSACKS 4
 #define DEFAULT_SNDBUFSIZE 4096
 #define DEFAULT_MAXSNDBUFSIZE 131072
+#define DEFAULT_RCVBUFSIZE 0
+#define DEFAULT_MAXRCVBUFSIZE 131072
+
+#define DEFAULT_MTU 1000
+
+#define USEC_PER_SEC 1000000
+#define DEFAULT_USER_TIMEOUT 60 // sec
+#define CLOCK_GRANULARITY 1000 // usec
+#define START_RTO 1000000 // usec
+#define MAX_RTO 3000000 // usec
 
 struct hdr {
 	uint16_t src; // Source port
@@ -71,15 +87,29 @@ 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;
+	uint32_t flags;
 
 	bool reapable;
 
 	// Callbacks
 
 	utcp_recv_t recv;
+	utcp_poll_t poll;
 
 	// TCP State
 
@@ -95,11 +125,11 @@ struct utcp_connection {
 
 		uint32_t last;
 		uint32_t cwnd;
+		uint32_t ssthresh;
 	} snd;
 
 	struct {
 		uint32_t nxt;
-		uint32_t wnd;
 		uint32_t irs;
 	} rcv;
 
@@ -109,17 +139,20 @@ 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 sndbufsize;
-	uint32_t maxsndbufsize;
+	struct buffer sndbuf;
+	struct buffer rcvbuf;
+	struct sack sacks[NSACKS];
 
 	// Per-socket options
 
 	bool nodelay;
 	bool keepalive;
+	bool shut_wr;
 
 	// Congestion avoidance state
 
@@ -138,8 +171,15 @@ struct utcp {
 
 	// Global socket options
 
-	uint16_t mtu;
-	int timeout;
+	uint16_t mtu; // The maximum size of a UTCP packet, including headers.
+	uint16_t mss; // The maximum size of the payload of a UTCP packet.
+	int timeout; // sec
+
+	// RTT variables
+
+	uint32_t srtt; // usec
+	uint32_t rttvar; // usec
+	uint32_t rto; // usec
 
 	// Connection management