Implement ringbuffers.

[utcp] / utcp_priv.h

diff --git a/utcp_priv.h b/utcp_priv.h
index 24f4158318ddccd8a4a586b72420fbe87de172c2..7d2d07396c7c6b097d39ea39bd23dfca98f43be1 100644 (file)
--- a/utcp_priv.h
+++ b/utcp_priv.h
@@ -30,6 +30,11 @@
 #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
@@ -38,10 +43,11 @@
 
 #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
+#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
@@ -83,6 +89,7 @@ static const char *strstate[] __attribute__((unused)) = {
 
 struct buffer {
        char *data;
+       uint32_t offset;
        uint32_t used;
        uint32_t size;
        uint32_t maxsize;
@@ -96,6 +103,7 @@ struct sack {
 struct utcp_connection {
        void *priv;
        struct utcp *utcp;
+       uint32_t flags;
 
        bool reapable;
 
@@ -118,11 +126,11 @@ struct utcp_connection {
 
                uint32_t last;
                uint32_t cwnd;
+               uint32_t ssthresh;
        } snd;
 
        struct {
                uint32_t nxt;
-               uint32_t wnd;
                uint32_t irs;
        } rcv;
 
@@ -145,6 +153,7 @@ struct utcp_connection {
 
        bool nodelay;
        bool keepalive;
+       bool shut_wr;
 
        // Congestion avoidance state
 
@@ -161,16 +170,21 @@ struct utcp {
        utcp_pre_accept_t pre_accept;
        utcp_send_t send;
 
+       // Packet buffer
+
+       void *pkt;
+
        // Global socket options
 
-       uint16_t mtu;
-       int timeout; // s
+       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; // us
-       uint32_t rttvar; // us
-       uint32_t rto; // us
+       uint32_t srtt; // usec
+       uint32_t rttvar; // usec
+       uint32_t rto; // usec
 
        // Connection management