original files of m241

components/ip_net2-6.9/iptcp/src/iptcp_debug.c

@@ -0,0 +1,576 @@
+/*
+ ******************************************************************************
+ *                     INTERPEAK SOURCE FILE
+ *
+ *   Document no: @(#) $Name: VXWORKS_ITER40_2019102207 $ $RCSfile: iptcp_debug.c,v $ $Revision: 1.25.10.2 $
+ *   $Source: /home/interpeak/CVSRoot/iptcp/src/iptcp_debug.c,v $
+ *   $Author: jren $
+ *   $State: Exp $ $Locker:  $
+ *
+ *   INTERPEAK_COPYRIGHT_STRING
+ *   Design and implementation by Kenneth Jonsson <kenneth@interpeak.se>
+ ******************************************************************************
+ */
+
+
+/*
+ ****************************************************************************
+ * 1                    DESCRIPTION
+ ****************************************************************************
+ */
+
+/*
+ ****************************************************************************
+ * 2                    CONFIGURATION
+ ****************************************************************************
+ */
+
+#ifndef IPCOM_KERNEL
+#define IPCOM_KERNEL
+#endif
+#include "iptcp_config.h"
+
+
+/*
+ ****************************************************************************
+ * 3                    INCLUDE FILES
+ ****************************************************************************
+ */
+
+#define IPCOM_USE_CLIB_PROTO
+#include <ipcom_type.h>
+#include <ipcom_clib.h>
+#include <ipcom_cstyle.h>
+
+#include "iptcp_h.h"
+
+/*
+ ****************************************************************************
+ * 4                    DEFINES
+ ****************************************************************************
+ */
+
+/*
+ ****************************************************************************
+ * 5                    TYPES
+ ****************************************************************************
+ */
+
+/*
+ ****************************************************************************
+ * 6                    EXTERN PROTOTYPES
+ ****************************************************************************
+ */
+
+/*
+ ****************************************************************************
+ * 7                    LOCAL PROTOTYPES
+ ****************************************************************************
+ */
+
+/*
+ ****************************************************************************
+ * 8                    DATA
+ ****************************************************************************
+ */
+
+/*
+ ****************************************************************************
+ * 9                    STATIC FUNCTIONS
+ ****************************************************************************
+ */
+
+/*
+ ****************************************************************************
+ * 10                   GLOBAL FUNCTIONS
+ ****************************************************************************
+ */
+
+/*
+ *===========================================================================
+ *                    iptcp_state_to_str
+ *===========================================================================
+ * Description: Returns a string representation of the state.
+ * Parameters:  state - One of the TCP states.
+ * Returns:     A string representation.
+ *
+ */
+IP_GLOBAL IP_CONST char *
+iptcp_state_to_str(int state)
+{
+    switch (state)
+    {
+    case IPTCP_STATE_CLOSED:
+        return "CLOSED";
+    case IPTCP_STATE_LISTEN:
+        return "LISTEN";
+    case IPTCP_STATE_SYN_SENT:
+        return "SYN_SENT";
+    case IPTCP_STATE_SYN_RCVD:
+        return "SYN_RECV";
+    case IPTCP_STATE_ESTABLISHED:
+        return "ESTABLISHED";
+    case IPTCP_STATE_CLOSE_WAIT:
+        return "CLOSE_WAIT";
+    case IPTCP_STATE_FIN_WAIT_1:
+        return "FIN_WAIT_1";
+    case IPTCP_STATE_CLOSING:
+        return "CLOSING";
+    case IPTCP_STATE_LAST_ACK:
+        return "LAST_ACK";
+    case IPTCP_STATE_FIN_WAIT_2:
+        return "FIN_WAIT_2";
+    case IPTCP_STATE_TIME_WAIT:
+        return "TIME_WAIT";
+    case IPTCP_STATE_DELETE_TCB:
+        return "DELETE_TCB";
+    default:
+        return "Unknown state";
+    }
+}
+
+
+/*
+ *===========================================================================
+ *                    iptcp_timer_to_str
+ *===========================================================================
+ * Description: Returns a string representation of the timer type.
+ * Parameters:  state - One of the TCP timer types.
+ * Returns:     A string representation.
+ *
+ */
+IP_GLOBAL IP_CONST char *
+iptcp_timer_to_str(int type)
+{
+    switch (type)
+    {
+    case IPTCP_TMRT_CONN:
+        return "CONN";
+    case IPTCP_TMRT_RETR:
+        return "RETR";
+    case IPTCP_TMRT_DACK:
+        return "DACK";
+    case IPTCP_TMRT_PERS:
+        return "PERS";
+    case IPTCP_TMRT_LOPE:
+        return "LOPE";
+    case IPTCP_TMRT_TIWA:
+        return "TIWA";
+    case IPTCP_TMRT_KEEP:
+        return "KEEP";
+    case IPTCP_TMRT_LNGR:
+        return "LNGR";
+    case IPTCP_TMRT_RSRT:
+        return "RSRT";
+    case IPTCP_TMRT_ZWP:
+        return "ZWP";
+    default:
+        return "Unkown timer type";
+    }
+}
+
+
+#ifdef IPNET_DEBUG
+
+/*
+ *===========================================================================
+ *                          iptcp_tick_to_string
+ *===========================================================================
+ * Description:
+ * Parameters:  unused -
+ *              buf -
+ *              buf_len -
+ * Returns:
+ *
+ */
+IP_GLOBAL int
+iptcp_tick_to_string(void *unused, char *buf, Ip_size_t buf_len)
+{
+    IPCOM_UNUSED_ARG(unused);
+    return ipcom_snprintf(buf, buf_len, "TCP tick timer.");
+}
+
+
+/*
+ *===========================================================================
+ *                      iptcp_to_string
+ *===========================================================================
+ * Description:
+ * Parameters:
+ * Returns:
+ *
+ */
+IP_STATIC int
+iptcp_to_string(Iptcp_socket *sock, const char *type, char *buf, Ip_size_t buf_len)
+{
+    return ipcom_snprintf(buf, buf_len, "TCP %s timer on socket %d",
+                          type, sock->ipcom.fd);
+}
+
+
+/*
+ *===========================================================================
+ *                      iptcp_pers_to_string
+ *===========================================================================
+ * Description:
+ * Parameters:
+ * Returns:
+ *
+ */
+IP_GLOBAL int
+iptcp_pers_to_string(Iptcp_socket *sock, char *buf, Ip_size_t buf_len)
+{
+    int offset = iptcp_to_string(sock, "persist", buf, buf_len);
+    offset += ipcom_snprintf(&buf[offset], buf_len - offset, " response %sseen  retrans %u",
+                             sock->tcb->peer_responded_to_pers ? "" : "not ",
+                             sock->tcb->retr_count);
+    return offset;
+}
+
+
+/*
+ *===========================================================================
+ *                      iptcp_keep_to_string
+ *===========================================================================
+ * Description:
+ * Parameters:
+ * Returns:
+ *
+ */
+IP_GLOBAL int
+iptcp_keep_to_string(Iptcp_socket *sock, char *buf, Ip_size_t buf_len)
+{
+    return iptcp_to_string(sock, "keep-alive", buf, buf_len);
+}
+
+
+/*
+ *===========================================================================
+ *                      iptcp_conn_to_string
+ *===========================================================================
+ * Description:
+ * Parameters:
+ * Returns:
+ *
+ */
+IP_GLOBAL int
+iptcp_conn_to_string(Iptcp_socket *sock, char *buf, Ip_size_t buf_len)
+{
+    return iptcp_to_string(sock, "connection", buf, buf_len);
+}
+
+
+/*
+ *===========================================================================
+ *                      iptcp_dack_to_string
+ *===========================================================================
+ * Description:
+ * Parameters:
+ * Returns:
+ *
+ */
+IP_GLOBAL int
+iptcp_dack_to_string(Iptcp_socket *sock, char *buf, Ip_size_t buf_len)
+{
+    return iptcp_to_string(sock, "delayed ack", buf, buf_len);
+}
+
+
+/*
+ *===========================================================================
+ *                      iptcp_retr_to_string
+ *===========================================================================
+ * Description:
+ * Parameters:
+ * Returns:
+ *
+ */
+IP_GLOBAL int
+iptcp_retr_to_string(Iptcp_socket *sock, char *buf, Ip_size_t buf_len)
+{
+    Iptcp_tcb     *tcb = sock->tcb;
+    Iptcp_segment *seg = tcb->send.resend_head;
+    int            offset;
+
+    if (seg == IP_NULL)
+        return 0;
+    offset = iptcp_to_string(sock, "retransmission", buf, buf_len);
+    offset += ipcom_snprintf(&buf[offset], buf_len - offset, "  seg %u  retrans %u",
+                             (unsigned) seg->seq_start,
+                             tcb->retr_count);
+    return offset;
+}
+
+
+/*
+ *===========================================================================
+ *                      iptcp_tiwa_to_string
+ *===========================================================================
+ * Description:
+ * Parameters:
+ * Returns:
+ *
+ */
+IP_GLOBAL int
+iptcp_tiwa_to_string(Iptcp_socket *sock, char *buf, Ip_size_t buf_len)
+{
+    return iptcp_to_string(sock, "time wait", buf, buf_len);
+}
+
+
+/*
+ *===========================================================================
+ *                      iptcp_lope_to_string
+ *===========================================================================
+ * Description:
+ * Parameters:
+ * Returns:
+ *
+ */
+IP_GLOBAL int
+iptcp_lope_to_string(Iptcp_socket *sock, char *buf, Ip_size_t buf_len)
+{
+    return iptcp_to_string(sock, "lost peer", buf, buf_len);
+}
+
+
+/*
+ *===========================================================================
+ *                      iptcp_lngr_to_string
+ *===========================================================================
+ * Description:
+ * Parameters:
+ * Returns:
+ *
+ */
+IP_GLOBAL int
+iptcp_lngr_to_string(Iptcp_socket *sock, char *buf, Ip_size_t buf_len)
+{
+    return iptcp_to_string(sock, "linger", buf, buf_len);
+}
+
+/*
+ *===========================================================================
+ *                      iptcp_zwp_to_string
+ *===========================================================================
+ * Description:
+ * Parameters:
+ * Returns:
+ *
+ */
+IP_GLOBAL int
+iptcp_zwp_to_string(Iptcp_socket *sock, char *buf, Ip_size_t buf_len)
+{
+    return iptcp_to_string(sock, "iptcp_zwp_to_string", buf, buf_len);
+}
+#endif /* IPNET_DEBUG */
+
+
+/*
+ ****************************************************************************
+ * 11                   PUBLIC FUNCTIONS
+ ****************************************************************************
+ */
+
+#ifdef IPTCP_DEBUG
+
+/*
+ *===========================================================================
+ *                    iptcp_pkt_freecheck
+ *===========================================================================
+ * Description:  Called from ipcom_pkt_free to verify pkt not in timerlist.
+ * Parameters:
+ * Returns:
+ *
+ */
+IP_PUBLIC void
+iptcp_pkt_freecheck(Ipcom_pkt *pkt)
+{
+    Ip_u32         isr;
+    int            i;
+    Iptcp_segment *tcp_seg;
+    Ipcom_pkt     *spkt;
+    Iptcp_socket  *sock;
+
+    isr = ipcom_interrupt_disable();
+
+    if (IPCOM_PKT_HAS_MULTIPLE_OWNERS(pkt) == IP_FALSE)
+    {
+        for (i = 0; i < IP_STACK(conf_max_sockets); i++)
+        {
+            sock = ipstack->sockets[i];
+            if (sock == IP_NULL || sock->tcb == IP_NULL)
+                continue;
+            ipcom_atomic_inc(&sock->ref_count);
+            for (tcp_seg = sock->tcb->send.resend_head;
+                 tcp_seg != IP_NULL;
+                 tcp_seg = tcp_seg->next)
+            {
+                ip_assert(pkt != tcp_seg->pkt);
+            }
+            for (spkt = sock->tcb->send.head;
+                 spkt != IP_NULL;
+                 spkt = spkt->next)
+            {
+                ip_assert(spkt != pkt);
+            }
+            ipcom_atomic_dec(&sock->ref_count);
+        }
+    }
+
+    ipcom_interrupt_enable(isr);
+}
+
+
+/*
+ *===========================================================================
+ *                    iptcp_ctrl_verify_retransq
+ *===========================================================================
+ * Description: Verifies that a packet can be found in the retransmission
+ *              queue on one of the TCP sockets.
+ * Parameters:  pkt - Packet to find.
+ * Returns:     The socket descriptor where the packet is in retrasmission queue.
+ *
+ */
+IP_PUBLIC Ip_fd
+iptcp_ctrl_verify_retransq(Ipcom_pkt *pkt)
+{
+    int            i;
+    Iptcp_socket  *sock;
+    Iptcp_segment *seg;
+
+    for (i = 0; i < IP_STACK(conf_max_sockets); i++)
+    {
+        sock = ipstack->sockets[i];
+        if (sock == IP_NULL || sock->tcb == IP_NULL)
+            /* Not a TCP socket */
+            continue;
+
+        for (seg = sock->tcb->send.resend_head; seg != IP_NULL; seg = seg->next)
+        {
+            if (seg->pkt == pkt)
+                return sock->ipcom.fd;
+        }
+    }
+    return IP_SOCKERR;
+}
+
+/*
+ *===========================================================================
+ *                    iptcp_ctrl_verify_sockrecvq
+ *===========================================================================
+ * Description: Verifies that a packet can be found in the receive
+ *              queue on one of the sockets.
+ * Parameters:  pkt - Packet to find.
+ * Returns:     The socket descriptor where the packet is queued.
+ *
+ */
+IP_PUBLIC Ip_fd
+iptcp_ctrl_verify_sockrecvq(Ipcom_pkt *pkt)
+{
+    int           i;
+    Iptcp_socket *sock;
+    Ipcom_pkt    *rpkt;
+
+    for (i = 0; i < IP_STACK(conf_max_sockets); i++)
+    {
+        sock = ipstack->sockets[i];
+        if (sock == IP_NULL)
+            continue;
+        if (sock->tcb == IP_NULL)
+            rpkt = sock->rcv_head;
+        else
+            rpkt = sock->rcv_head;
+
+        for (; rpkt != IP_NULL; rpkt = rpkt->next)
+        {
+            if (rpkt == pkt)
+                return sock->ipcom.fd;
+        }
+    }
+    return IP_SOCKERR;
+}
+
+/*
+ *===========================================================================
+ *                    iptcp_ctrl_verify_sockooorecvq
+ *===========================================================================
+ * Description: Verifies that a packet can be found in the receive queue
+ *              for out-of-order packets on one of the TCP sockets.
+ * Parameters:  pkt - Packet to find.
+ *              str - Buffer to print the status.
+ * Returns:     The socket descriptor where the packet is queued in the
+ *              out-of-order queue.
+ *
+ */
+IP_PUBLIC Ip_fd
+iptcp_ctrl_verify_sockooorecvq(Ipcom_pkt *pkt)
+{
+    int            i;
+    Iptcp_socket  *sock;
+    Iptcp_segment *seg;
+
+    for (i = 0; i < IP_STACK(conf_max_sockets); i++)
+    {
+        sock = ipstack->sockets[i];
+        if (sock == IP_NULL || sock->tcb == IP_NULL)
+            /* Not a TCP socket */
+            continue;
+
+        for (seg = sock->tcb->recv.out_of_order_seg; seg != IP_NULL; seg = seg->next)
+        {
+            if (seg->pkt == pkt)
+                return sock->ipcom.fd;
+        }
+    }
+    return IP_SOCKERR;
+}
+
+
+/*
+ *===========================================================================
+ *                         iptcp_print_tcb_flags
+ *===========================================================================
+ * Description: Converts the flags field from a TCB to a human readable form
+ * Parameters:  flags - flags from the TCB field of a TCP socket.
+ * Returns:
+ *
+ */
+#ifdef NOT_CALLED_BY_ANY_OTHER_FUNCTION
+IP_PUBLIC void
+iptcp_print_tcb_flags(Ip_u32 flags)
+{
+    printf("%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
+           flags & IPTCP_TCPC_FLAG_PASSIVE_OPEN ? "PASSIVE_OPEN\n" : "",
+           flags & IPTCP_TCPC_FLAG_SOCK_CLOSED ? "SOCK_CLOSED\n" : "",
+           flags & IPTCP_TCPC_FLAG_CONNABORTED ? "CONNABORTED\n" : "",
+           flags & IPTCP_TCPC_FLAG_SMALL_PKT_OUT ? "SMALL_PKT_OUT\n" : "",
+           flags & IPTCP_TCPC_FLAG_NO_SMDE ? "NO_SMDE\n" : "",
+           flags & IPTCP_TCPC_FLAG_RTT ? "RTT\n" : "",
+           flags & IPTCP_TCPC_FLAG_ACK_PENDING ? "ACK_PENDING\n" : "",
+           flags & IPTCP_TCPC_FLAG_DACK_PENDING ? "DACK_PENDING\n" : "",
+           flags & IPTCP_TCPC_FLAG_PERS_PENDING ? "PERS_PENDING\n" : "",
+           flags & IPTCP_TCPC_FLAG_KEEP_PENDING ? "KEEP_PENDING\n" : "",
+           flags & IPTCP_TCPC_FLAG_FIN_PENDING ? "FIN_PENDING\n" : "",
+           flags & IPTCP_TCPC_FLAG_TIMESTAMP_OPT ? "TIMESTAMP_OPT\n" : "",
+           flags & IPTCP_TCPC_FLAG_WND_SCALE_OPT ? "WND_SCALE_OPT\n" : "",
+           flags & IPTCP_TCPC_FLAG_RESENDING ? "RESENDING\n" : "",
+           flags & IPTCP_TCPC_FLAG_FAST_RETRANS ? "FAST_RETRANS\n" : "",
+           flags & IPTCP_TCPC_FLAG_SENDER_URG ? "SENDER_URG\n" : "",
+           flags & IPTCP_TCPC_FLAG_RECEIVER_URG ? "RECVEIVER_URG\n" : "",
+           flags & IPTCP_TCPC_FLAG_SACK ? "SACK\n" : "",
+           flags & IPTCP_TCPC_FLAG_CORK ? "CORK\n" : "",
+           flags & IPTCP_TCPC_FLAG_RFC_1122_URG ? "RFC_1122_URG\n" : "",
+           flags & IPTCP_TCPC_FLAG_KCLOSE_PENDING ? "KCLOSE_PENDING\n" : "",
+           flags & IPTCP_TCPC_FLAG_USER_REF ? "USER_REF\n" : "");
+}
+#endif
+
+#endif /* IPTCP_DEBUG */
+
+/*
+ ****************************************************************************
+ *                      END OF FILE
+ ****************************************************************************
+ */
+

components/ip_net2-6.9/iptcp/src/iptcp_h.h

@@ -0,0 +1,375 @@
+/*
+ ******************************************************************************
+ *                     HEADER FILE
+ *
+ *   Document no: @(#) $Name: VXWORKS_ITER40_2019102207 $ $RCSfile: iptcp_h.h,v $ $Revision: 1.28.10.5 $
+ *   $Source: /home/interpeak/CVSRoot/iptcp/src/iptcp_h.h,v $
+ *   $Author: jli7 $ $Date: 2015-02-09 03:38:14 $
+ *   $State: Exp $ $Locker:  $
+ *
+ *   INTERPEAK_COPYRIGHT_STRING
+ *   Design and implementation by Kenneth Jonsson <kenneth@interpeak.se>
+ ******************************************************************************
+ */
+#ifndef IPTCP_H_H
+#define IPTCP_H_H
+
+/*
+ ****************************************************************************
+ * 1                    DESCRIPTION
+ ****************************************************************************
+ */
+/* Definitions that are private to the TCP module */
+
+/*
+ ****************************************************************************
+ * 2                    CONFIGURATION
+ ****************************************************************************
+ */
+
+#include "iptcp_config.h"
+
+/*
+ ****************************************************************************
+ * 3                    INCLUDE FILES
+ ****************************************************************************
+ */
+
+#ifdef IPNET
+#include <ipnet.h>
+#include <ipnet_h.h>
+#endif
+
+#ifdef IPLITE
+#include <iplite.h>
+#include <iplite_h.h>
+#endif
+
+#include "iptcp.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ ****************************************************************************
+ * 4                    DEFINES
+ ****************************************************************************
+ */
+
+/*
+ *===========================================================================
+ *                         syslog
+ *===========================================================================
+ */
+#ifdef IPCOM_SYSLOG_PRIORITY
+#undef IPCOM_SYSLOG_PRIORITY
+#endif
+#define IPCOM_SYSLOG_PRIORITY    IPTCP_SYSLOG_PRIORITY
+
+#ifdef IPCOM_SYSLOG_FACILITY
+#undef IPCOM_SYSLOG_FACILITY
+#endif
+#define IPCOM_SYSLOG_FACILITY    IPCOM_LOG_IPTCP
+
+
+/*
+ *===========================================================================
+ *                         DEBUG/ASSERT
+ *===========================================================================
+ */
+
+#ifdef IPTCP_DEBUG
+#define IPTCP_DEBUG_LINE(x)    x
+#else
+#define IPTCP_DEBUG_LINE(x)    IP_NOOP
+#endif /* IPTCP_DEBUG */
+
+
+/* Stack specific defines */
+# define IP_STACK(x)                         ipnet_ ## x
+# define IP_STACK_CONST(x)                   IPNET_ ## x
+# define IPTCP_SOCK_VR(s)                    ((s)->vr_index)
+# define IPTCP_SOCK_MRIO(s)                  ((s)->mprio)
+# define IPTCP_SOCK_ADD_WAITING_RECEIVER(s)  IPNET_SOCK_ADD_WAITING_RECEIVER(s)
+# define IPTCP_SOCK_DEL_WAITING_RECEIVER(s)  \
+    do { \
+        if (IPTCP_SOCK_HAS_WAITING_RECEIVERS(s)) \
+            IPNET_SOCK_DEL_WAITING_RECEIVER(s); \
+    } while (0)
+# define IPTCP_SOCK_HAS_WAITING_RECEIVERS(s) IPNET_SOCK_HAS_WAITING_RECEIVERS(s)
+
+
+/*
+ *===========================================================================
+ *                         IPTCP code lock
+ *===========================================================================
+ */
+#ifdef IPNET
+# define IPTCP_DATA_LOCK(sl)            IPNET_DATA_LOCK(sl)
+# define IPTCP_DATA_UNLOCK(sl)          IPNET_DATA_UNLOCK(sl)
+# define IPTCP_DATA_ISLOCKED(sl)        IPNET_DATA_ISLOCKED(sl)
+# define IPTCP_DATA_ISLOCKED_ASSERT(sl) IPNET_DATA_ISLOCKED_ASSERT(sl)
+#else /* IPLITE */
+# define IPTCP_CODE_LOCK_READ()         IPLITE_CODE_LOCK()
+# define IPTCP_CODE_LOCK_WRITE()        IPLITE_CODE_LOCK()
+# define IPTCP_CODE_LOCK()              IPTCP_CODE_LOCK_WRITE()
+# define IPTCP_CODE_UNLOCK()            IPLITE_CODE_UNLOCK()
+# define IPTCP_DATA_LOCK(x)             IP_NOOP
+# define IPTCP_DATA_UNLOCK(x)           IP_NOOP
+# define IPTCP_DATA_ISLOCKED(x)         IP_FALSE
+# define IPTCP_DATA_ISLOCKED_ASSERT(sl) IP_NOOP
+#endif
+
+
+/*
+ ****************************************************************************
+ * 5                    TYPES
+ ****************************************************************************
+ */
+
+/*
+ *===========================================================================
+ *                   Parameters for one TCP segment
+ *===========================================================================
+ */
+typedef struct Iptcp_segment_struct
+{
+    struct Iptcp_segment_struct  *next;
+                             /* Next packet in resend list for outgoing and next
+                                out-of-order package for incoming */
+    Ipcom_pkt   *pkt;        /* Pointer to the packet that holds the TCP segment data */
+    Ip_u32       seq_start;  /* First sequence number for segment */
+    Ip_u32       seq_end;    /* Last sequence number for segment */
+    int          app_start;  /* (Only send) Start of application data */
+    int          app_end;    /* (Only send) End of application data */
+    Ip_u16       flags_n;    /* The TCP flags for this segment */
+#ifdef IPTCP_USE_SACK_OPT
+    Ip_u8        is_sacked;  /* (Only send) IP_TRUE if the segment has
+                                been ACK:ed in a selective ACK option
+                                (Only receiver) IP_FALSE if this segment
+                                has not been included in a SACK option yet */
+#endif
+    Ip_s64       last_msec;  /* Last timestamp this segment was processed */
+}
+Iptcp_segment;
+
+
+/*
+ *===========================================================================
+ *                         Iptcp_stats
+ *===========================================================================
+ * IPTCP debug statistics useful for debugging the TCP module if things go wrong.
+ */
+#ifdef IPNET_STATISTICS
+#define IPTCP_STATISTICS
+#endif
+
+#if defined(IPTCP_DEBUG) || defined(IPTCP_STATISTICS)
+typedef struct Iptcp_stats_struct
+{
+    int    tcp_input;
+    int    tcp_input_hdr_trunc;
+    int    tcp_input_badchksum;
+#ifdef IPTCP_USE_AO
+    int    tcp_input_badauth;
+#endif
+    int    tcp_input_sock_match;
+    int    tcp_input_sock_nomatch;
+    int    tcp_input_sock_closed;
+    int    tcp_input_sock_closed2;
+    int    tcp_input_sock_data_in_close_wait;
+    int    tcp_input_rst_listen;
+    int    tcp_input_nosyn_listen;
+    int    tcp_input_backlog_enobufs;
+    int    tcp_input_qrecv_enobufs;
+    int    tcp_input_syn_inval_state;
+    int    tcp_input_syn_inval_option;
+    int    tcp_input_inval_win;
+    int    tcp_input_rst;
+    int    tcp_input_must_have_ack;
+    int    tcp_input_must_not_have_ack;
+    int    tcp_input_toohigh_ack;
+    int    tcp_input_fin;
+    int    tcp_input_fin_err;
+    int    tcp_input_fin_ok;
+    int    tcp_input_queue_pkt_ok;
+    int    tcp_input_queue_pkt_outoforder;
+    int    tcp_input_queue_pkt_err;
+    int    tcp_input_state_err;
+    int    tcp_input_listen_invalid_src_addr;
+
+    int    tcp_output;
+    int    tcp_output_err;
+    int    tcp_output_pkt_nomem;
+    int    tcp_output_pkt_enobufs2;
+
+    int    tcp_send;
+    int    tcp_send_err;
+    int    tcp_send_slept;
+    int    tcp_send_sock_errno;
+    int    tcp_send_enotconn;
+    int    tcp_send_ewouldblock;
+    int    tcp_sendto;
+    int    tcp_timer_nomem;
+    int    tcp_timer_enobufs;
+    int    tcp_state_enobufs;
+    int    tcp_sock_enobufs;
+    int    tcp_listen_backlog_enobufs;
+
+    int    tcp_pkt_drain_outoforder;
+}
+Iptcp_stats;
+
+#define IPTCP_STATS(xvar)      iptcp->stats.xvar
+
+#define IPTCP_STAT_LINE(xline) xline
+
+#else /* No TCP stats */
+#define IPTCP_STATS(xvar)      IP_NOOP
+#define IPTCP_STAT_LINE(xline) IP_NOOP
+#endif /* defined(IPTCP_DEBUG) || defined(IPTCP_STATISTICS) */
+
+#if defined(IPTCP_USE_AO)
+typedef struct Iptcp_ao_inst_struct
+{
+    Ip_u32             local_isn;        /* local Initial sequence number, this is
+                                            needed when changed to new MKT, net-byte */
+    Ip_u32             remote_isn;       /* remote Initial sequence number, this is
+                                            needed when changed to new MKT, net-byte */
+    Iptcp_ao_mkt_inst *current_key;      /* current MKT instance for this TCB */
+    Iptcp_ao_mkt_inst *rnext_key;        /* next received MKT instance for this TCB */
+    Iptcp_ao_mkt_inst *snext_key;        /* next send MKT instance for this TCB */
+    Iptcp_ao_mkt_inst *backup_key;       /* backup MKT instance rnext_key or snext_key */
+    Iptcp_ao_keyids   *keyids;
+    Ip_u8             *tkey[2];          /* 0 for send, 1 for receive
+                                            CONNECTION INIT
+                                            0 - Send_SYN_traffic_key
+                                            1 - Receive_SYN_traffic_key 
+                                            ESTABLISHED
+                                            0 - Send_other_traffic_key
+                                            1 - Receive_other_traffic_key */
+    Ip_u32             sne[2];           /* 0/1 for send/receive, detailed in RFC5925 6.2 */
+    Ip_u32             prev_seq[2];      /* 0/1 for send/receive, detailed in RFC5925 6.2 */
+    Ip_u8              sne_flag[2];      /* 0/1 for send/receive, detailed in RFC5925 6.2 */
+    Ip_u8              accept_icmp_flag; /* whether accept the 'hard error' */
+}
+Iptcp_ao_inst;
+
+typedef struct Iptcp_ao_mkt_list_struct
+{
+    Iptcp_ao_mkt  mkt;
+    Ipcom_list    next;   /* MKT(Master Key Tuple) list next pointer,
+                             head in struct Ipsctp_ao_infor.mkt_head[x] */
+}
+Iptcp_ao_mkt_list;
+
+typedef struct Ipsctp_ao_infor_struct
+{
+    Ipcom_list mkt_head[2];            /* MKT(Master Key Tuple) list
+                                          [domain: 0=inet,1=inet6]
+                                          for struct Iptcp_ao_mkt_list */
+    Ip_u32     log_rate_limit_val;     /* current remained log rate limit number */
+    Ip_bool    log_rate_limit_restart; /* flag for restart log rate limit timer */
+}
+Ipsctp_ao_infor;
+#endif /* defined(IPTCP_USE_AO) */
+
+
+typedef struct Iptcp_data_struct
+{
+    /*
+     * TCP initial send sequence number
+     */
+    Ip_u32         iss;
+     /*
+      * The time a socket was last created
+      */
+    Ip_s64         msec_last_sock_create;
+
+#ifndef IPCOM_FORWARDER_NAE
+    /*
+     * TCP segment header slab cache
+     */
+    Ipcom_memory_cache *tcp_segment_slab;
+    /*
+     * List of active socket. All of the sockets in this list must be
+     * checked for timeouts each tick.
+     */
+    Ipcom_list     active_head;
+    /*
+     * Timer for the closes (in time) TCP timeout.
+     */
+    Ipnet_timeout *tmo;
+    /*
+     * Absolute time when the next IPTCP timer expires, valid only if
+     * 'tmo' is != IP_NULL.
+     */
+    Ip_s64 next_timeout_abs_msec;
+#endif
+
+    /*
+     * List of TCB in states that is short lived under normal
+     * operations. SYN_RCV, FIN_WAIT_1 & LAST_ACK. The session that
+     * has been in this state for the longest time is sitting at the
+     * front of the list.
+     */
+    Ipcom_list     transient_head;
+    /*
+     * List of sockets that an application has called close() on
+     */
+    Ipcom_list     user_closed_sock_head;
+
+#ifdef IPTCP_USE_AO
+    Ipsctp_ao_infor ao;
+#endif
+
+#if defined(IPTCP_DEBUG) || defined(IPTCP_STATISTICS)
+    Iptcp_stats        stats;              /* Statistics */
+#endif
+
+    /*Secret key for generating initial sequnce number*/
+    Ip_u32 key[4];
+}
+Iptcp_data;
+
+
+IP_EXTERN Iptcp_data   *iptcp;
+
+
+/*
+ ****************************************************************************
+ * 6                    PROTOTYPES
+ ****************************************************************************
+ */
+
+IP_GLOBAL int iptcp_send_reset(IP_CONST void *peer_addr,
+                               IP_CONST void *local_addr,
+                               Iptcp_socket *sock,
+                               Iptcp_segment *seg);
+
+IP_GLOBAL IP_CONST char *iptcp_state_to_str(int state);
+IP_GLOBAL IP_CONST char *iptcp_timer_to_str(int type);
+
+IP_GLOBAL int iptcp_tick_to_string(void *unused, char *buf, Ip_size_t buf_len);
+IP_GLOBAL int iptcp_pers_to_string(Iptcp_socket *sock, char *buf, Ip_size_t buf_len);
+IP_GLOBAL int iptcp_keep_to_string(Iptcp_socket *sock, char *buf, Ip_size_t buf_len);
+IP_GLOBAL int iptcp_conn_to_string(Iptcp_socket *sock, char *buf, Ip_size_t buf_len);
+IP_GLOBAL int iptcp_dack_to_string(Iptcp_socket *sock, char *buf, Ip_size_t buf_len);
+IP_GLOBAL int iptcp_retr_to_string(Iptcp_socket *sock, char *buf, Ip_size_t buf_len);
+IP_GLOBAL int iptcp_tiwa_to_string(Iptcp_socket *sock, char *buf, Ip_size_t buf_len);
+IP_GLOBAL int iptcp_lope_to_string(Iptcp_socket *sock, char *buf, Ip_size_t buf_len);
+IP_GLOBAL int iptcp_lngr_to_string(Iptcp_socket *sock, char *buf, Ip_size_t buf_len);
+IP_GLOBAL int iptcp_zwp_to_string(Iptcp_socket *sock, char *buf, Ip_size_t buf_len);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* IPTCP_H */
+
+/*
+ ****************************************************************************
+ *                      END OF FILE
+ ****************************************************************************
+ */