BSD 4_3_Net_2 release

[unix-history] / usr / src / sys / sys / socketvar.h

diff --git a/usr/src/sys/sys/socketvar.h b/usr/src/sys/sys/socketvar.h
index 5715a3c..d8b6ac5 100644 (file)
--- a/usr/src/sys/sys/socketvar.h
+++ b/usr/src/sys/sys/socketvar.h
@@ -1,4 +1,37 @@
-/*     socketvar.h     4.12    82/01/17        */
+/*-
+ * Copyright (c) 1982, 1986, 1990 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *     This product includes software developed by the University of
+ *     California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *     @(#)socketvar.h 7.17 (Berkeley) 5/5/91
+ */

 
 /*
  * Kernel structure per socket.
 
 /*
  * Kernel structure per socket.


@@ -13,85 +46,126 @@ struct socket {
        short   so_state;               /* internal state flags SS_*, below */
        caddr_t so_pcb;                 /* protocol control block */
        struct  protosw *so_proto;      /* protocol handle */
        short   so_state;               /* internal state flags SS_*, below */
        caddr_t so_pcb;                 /* protocol control block */
        struct  protosw *so_proto;      /* protocol handle */

+/*
+ * Variables for connection queueing.
+ * Socket where accepts occur is so_head in all subsidiary sockets.
+ * If so_head is 0, socket is not related to an accept.
+ * For head socket so_q0 queues partially completed connections,
+ * while so_q is a queue of connections ready to be accepted.
+ * If a connection is aborted and it has so_head set, then
+ * it has to be pulled out of either so_q0 or so_q.
+ * We allow connections to queue up based on current queue lengths
+ * and limit on number of queued connections for this socket.
+ */
+       struct  socket *so_head;        /* back pointer to accept socket */
+       struct  socket *so_q0;          /* queue of partial connections */
+       struct  socket *so_q;           /* queue of incoming connections */
+       short   so_q0len;               /* partials on so_q0 */
+       short   so_qlen;                /* number of connections on so_q */
+       short   so_qlimit;              /* max number queued connections */
+       short   so_timeo;               /* connection timeout */
+       u_short so_error;               /* error affecting connection */
+       pid_t   so_pgid;                /* pgid for signals */
+       u_long  so_oobmark;             /* chars to oob mark */
+/*
+ * Variables for socket buffering.
+ */

        struct  sockbuf {
        struct  sockbuf {

-               short   sb_cc;          /* actual chars in buffer */
-               short   sb_hiwat;       /* max actual char count */
-               short   sb_mbcnt;       /* chars of mbufs used */
-               short   sb_mbmax;       /* max chars of mbufs to use */
-               short   sb_lowat;       /* low water mark (not used yet) */
-               short   sb_timeo;       /* timeout (not used yet) */
+               u_long  sb_cc;          /* actual chars in buffer */
+               u_long  sb_hiwat;       /* max actual char count */
+               u_long  sb_mbcnt;       /* chars of mbufs used */
+               u_long  sb_mbmax;       /* max chars of mbufs to use */
+               long    sb_lowat;       /* low water mark */

                struct  mbuf *sb_mb;    /* the mbuf chain */
                struct  proc *sb_sel;   /* process selecting read/write */
                short   sb_flags;       /* flags, see below */
                struct  mbuf *sb_mb;    /* the mbuf chain */
                struct  proc *sb_sel;   /* process selecting read/write */
                short   sb_flags;       /* flags, see below */

+               short   sb_timeo;       /* timeout for read/write */

        } so_rcv, so_snd;
        } so_rcv, so_snd;

-#define        SB_LOCK         0x01            /* lock on data queue (so_rcv only) */
+#define        SB_MAX          (64*1024)       /* default for max chars in sockbuf */
+#define        SB_LOCK         0x01            /* lock on data queue */

 #define        SB_WANT         0x02            /* someone is waiting to lock */
 #define        SB_WAIT         0x04            /* someone is waiting for data/space */
 #define        SB_WANT         0x02            /* someone is waiting to lock */
 #define        SB_WAIT         0x04            /* someone is waiting for data/space */

-#define        SB_SEL          0x08            /* buffer is selected */
-#define        SB_COLL         0x10            /* collision selecting */
-       short   so_timeo;               /* connection timeout */
-       u_short so_error;               /* error affecting connection */
-       struct  sockaddr so_addr;       /* socket address */
-       short   so_oobmark;             /* chars to oob mark */
-       short   so_pgrp;                /* pgrp for signals */
+#define        SB_SEL          0x08            /* someone is selecting */
+#define        SB_ASYNC        0x10            /* ASYNC I/O, need signals */
+#define        SB_NOTIFY       (SB_WAIT|SB_SEL|SB_ASYNC)
+#define        SB_COLL         0x20            /* collision selecting */
+#define        SB_NOINTR       0x40            /* operations not interruptible */
+
+       caddr_t so_tpcb;                /* Wisc. protocol control block XXX */

 };
 
 /*
  * Socket state bits.
  */
 };
 
 /*
  * Socket state bits.
  */

-#define        SS_USERGONE             0x01    /* no file table ref any more */
-#define        SS_ISCONNECTED          0x02    /* socket connected to a peer */
-#define        SS_ISCONNECTING         0x04    /* in process of connecting to peer */
-#define        SS_ISDISCONNECTING      0x08    /* in process of disconnecting */
-#define        SS_CANTSENDMORE         0x10    /* can't send more data to peer */
-#define        SS_CANTRCVMORE          0x20    /* can't receive more data from peer */
-#define        SS_CONNAWAITING         0x40    /* connections awaiting acceptance */
-#define        SS_RCVATMARK            0x80    /* at mark on input */
+#define        SS_NOFDREF              0x001   /* no file table ref any more */
+#define        SS_ISCONNECTED          0x002   /* socket connected to a peer */
+#define        SS_ISCONNECTING         0x004   /* in process of connecting to peer */
+#define        SS_ISDISCONNECTING      0x008   /* in process of disconnecting */
+#define        SS_CANTSENDMORE         0x010   /* can't send more data to peer */
+#define        SS_CANTRCVMORE          0x020   /* can't receive more data from peer */
+#define        SS_RCVATMARK            0x040   /* at mark on input */
+
+#define        SS_PRIV                 0x080   /* privileged for broadcast, raw... */
+#define        SS_NBIO                 0x100   /* non-blocking ops */
+#define        SS_ASYNC                0x200   /* async i/o notify */
+#define        SS_ISCONFIRMING         0x400   /* deciding to accept connection req */
+

 
 /*
  * Macros for sockets and socket buffering.
  */
 
 
 /*
  * Macros for sockets and socket buffering.
  */
 

-/* how much space is there in a socket buffer (so->so_snd or so->so_rcv) */
+/*
+ * How much space is there in a socket buffer (so->so_snd or so->so_rcv)?
+ * This is problematical if the fields are unsigned, as the space might
+ * still be negative (cc > hiwat or mbcnt > mbmax).  Should detect
+ * overflow and return 0.  Should use "lmin" but it doesn't exist now.
+ */

 #define        sbspace(sb) \
 #define        sbspace(sb) \

-    (MIN((sb)->sb_hiwat-(sb)->sb_cc, ((sb)->sb_mbmax-(sb)->sb_mbcnt)))
+    ((long) imin((int)((sb)->sb_hiwat - (sb)->sb_cc), \
+        (int)((sb)->sb_mbmax - (sb)->sb_mbcnt)))

 
 /* do we have to send all at once on a socket? */
 #define        sosendallatonce(so) \
 
 /* do we have to send all at once on a socket? */
 #define        sosendallatonce(so) \

-    (((so)->so_options & SO_NONBLOCKING) || ((so)->so_proto->pr_flags & PR_ATOMIC))
+    ((so)->so_proto->pr_flags & PR_ATOMIC)

 
 /* can we read something from so? */
 #define        soreadable(so) \
 
 /* can we read something from so? */
 #define        soreadable(so) \

-    ((so)->so_rcv.sb_cc || ((so)->so_state & (SS_CANTRCVMORE|SS_CONNAWAITING)))
+    ((so)->so_rcv.sb_cc >= (so)->so_rcv.sb_lowat || \
+       ((so)->so_state & SS_CANTRCVMORE) || \
+       (so)->so_qlen || (so)->so_error)

 
 /* can we write something to so? */
 #define        sowriteable(so) \
 
 /* can we write something to so? */
 #define        sowriteable(so) \

-    (sbspace(&(so)->so_snd) > 0 || ((so)->so_state & SS_CANTSENDMORE))
+    (sbspace(&(so)->so_snd) >= (so)->so_snd.sb_lowat && \
+       (((so)->so_state&SS_ISCONNECTED) || \
+         ((so)->so_proto->pr_flags&PR_CONNREQUIRED)==0) || \
+     ((so)->so_state & SS_CANTSENDMORE) || \
+     (so)->so_error)

 
 /* adjust counters in sb reflecting allocation of m */
 #define        sballoc(sb, m) { \
        (sb)->sb_cc += (m)->m_len; \
        (sb)->sb_mbcnt += MSIZE; \
 
 /* adjust counters in sb reflecting allocation of m */
 #define        sballoc(sb, m) { \
        (sb)->sb_cc += (m)->m_len; \
        (sb)->sb_mbcnt += MSIZE; \

-       if ((m)->m_off > MMAXOFF) \
-               (sb)->sb_mbcnt += CLBYTES; \
+       if ((m)->m_flags & M_EXT) \
+               (sb)->sb_mbcnt += (m)->m_ext.ext_size; \

 }
 
 /* adjust counters in sb reflecting freeing of m */
 #define        sbfree(sb, m) { \
        (sb)->sb_cc -= (m)->m_len; \
        (sb)->sb_mbcnt -= MSIZE; \
 }
 
 /* adjust counters in sb reflecting freeing of m */
 #define        sbfree(sb, m) { \
        (sb)->sb_cc -= (m)->m_len; \
        (sb)->sb_mbcnt -= MSIZE; \

-       if ((m)->m_off > MMAXOFF) \
-               (sb)->sb_mbcnt -= CLBYTES; \
+       if ((m)->m_flags & M_EXT) \
+               (sb)->sb_mbcnt -= (m)->m_ext.ext_size; \

 }
 
 }
 

-/* set lock on sockbuf sb */
-#define sblock(sb) { \
-       while ((sb)->sb_flags & SB_LOCK) { \
-               (sb)->sb_flags |= SB_WANT; \
-               sleep((caddr_t)&(sb)->sb_flags, PZERO+1); \
-       } \
-       (sb)->sb_flags |= SB_LOCK; \
-}
+/*
+ * Set lock on sockbuf sb; sleep if lock is already held.
+ * Unless SB_NOINTR is set on sockbuf, sleep is interruptible.
+ * Returns error without lock if sleep is interrupted.
+ */
+#define sblock(sb) ((sb)->sb_flags & SB_LOCK ? sb_lock(sb) : \
+               ((sb)->sb_flags |= SB_LOCK, 0))

 
 /* release lock on sockbuf sb */
 #define        sbunlock(sb) { \
 
 /* release lock on sockbuf sb */
 #define        sbunlock(sb) { \


@@ -102,5 +176,24 @@ struct socket {
        } \
 }
 
        } \
 }
 

-#define        sorwakeup(so)   sbwakeup(&(so)->so_rcv)
-#define        sowwakeup(so)   sbwakeup(&(so)->so_snd)
+#define        sorwakeup(so)   sowakeup((so), &(so)->so_rcv)
+#define        sowwakeup(so)   sowakeup((so), &(so)->so_snd)
+
+#ifdef KERNEL
+u_long sb_max;
+/* to catch callers missing new second argument to sonewconn: */
+#define        sonewconn(head, connstatus)     sonewconn1((head), (connstatus))
+struct socket *sonewconn1 __P((struct socket *head, int connstatus));
+
+/* strings for sleep message: */
+extern char netio[], netcon[], netcls[];
+
+/*
+ * File operations on sockets.
+ */
+int    soo_read __P((struct file *fp, struct uio *uio, struct ucred *cred));
+int    soo_write __P((struct file *fp, struct uio *uio, struct ucred *cred));
+int    soo_ioctl __P((struct file *fp, int com, caddr_t data, struct proc *p));
+int    soo_select __P((struct file *fp, int which, struct proc *p));
+int    soo_close __P((struct file *fp, struct proc *p));
+#endif