Add UDP semantics.

[utcp] / utcp_priv.h

diff --git a/utcp_priv.h b/utcp_priv.h
index 184e3386bf00e8c3a3addabd1c39bd9086f5d40a..fa706bcf84bcad5eed5e825bf3c7bc671cd51542 100644 (file)
--- a/utcp_priv.h
+++ b/utcp_priv.h
@@ -30,8 +30,19 @@
 #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 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 +82,29 @@ 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
 
@@ -109,13 +134,14 @@ 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 +166,13 @@ struct utcp {
        // Global socket options
 
        uint16_t mtu;
-       int timeout;
+       int timeout; // sec
+
+       // RTT variables
+
+       uint32_t srtt; // usec
+       uint32_t rttvar; // usec
+       uint32_t rto; // usec
 
        // Connection management