move mtpr.h to vax directory

[unix-history] / usr / src / sys / netinet / in_pcb.c

diff --git a/usr/src/sys/netinet/in_pcb.c b/usr/src/sys/netinet/in_pcb.c
index f6ed6a9..689cb62 100644 (file)
--- a/usr/src/sys/netinet/in_pcb.c
+++ b/usr/src/sys/netinet/in_pcb.c
@@ -1,4 +1,4 @@
-/*     in_pcb.c        4.23    82/03/29        */
+/*     in_pcb.c        4.32    82/10/09        */

 
 #include "../h/param.h"
 #include "../h/systm.h"
 
 #include "../h/param.h"
 #include "../h/systm.h"


@@ -7,105 +7,94 @@
 #include "../h/mbuf.h"
 #include "../h/socket.h"
 #include "../h/socketvar.h"
 #include "../h/mbuf.h"
 #include "../h/socket.h"
 #include "../h/socketvar.h"

-#include "../net/in.h"
-#include "../net/in_systm.h"
+#include "../netinet/in.h"
+#include "../netinet/in_systm.h"

 #include "../net/if.h"
 #include "../net/route.h"
 #include "../net/if.h"
 #include "../net/route.h"

-#include "../net/in_pcb.h"
+#include "../netinet/in_pcb.h"

 #include "../h/protosw.h"
 
 #include "../h/protosw.h"
 

-/*
- * Routines to manage internet protocol control blocks.
- *
- * At PRU_ATTACH time a protocol control block is allocated in
- * in_pcballoc() and inserted on a doubly-linked list of such blocks
- * for the protocol.  A port address is either requested (and verified
- * to not be in use) or assigned at this time.  We also allocate
- * space in the socket sockbuf structures here, although this is
- * not a clearly correct place to put this function.
- *
- * A connectionless protocol will have its protocol control block
- * removed at PRU_DETACH time, when the socket will be freed (freeing
- * the space reserved) and the block will be removed from the list of
- * blocks for its protocol.
- *
- * A connection-based protocol may be connected to a remote peer at
- * PRU_CONNECT time through the routine in_pcbconnect().  In the normal
- * case a PRU_DISCONNECT occurs causing a in_pcbdisconnect().
- * It is also possible that higher-level routines will opt out of the
- * relationship with the connection before the connection shut down
- * is complete.  This often occurs in protocols like TCP where we must
- * hold on to the protocol control block for a unreasonably long time
- * after the connection is used up to avoid races in later connection
- * establishment.  To handle this we allow higher-level routines to
- * disassociate themselves from the socket, marking it SS_USERGONE while
- * the disconnect is in progress.  We notice that this has happened
- * when the disconnect is complete, and perform the PRU_DETACH operation,
- * freeing the socket.
- *
- * TODO:
- *     use hashing
- */

 struct in_addr zeroin_addr;
 
 struct in_addr zeroin_addr;
 

-/*
- * Allocate a protocol control block, space
- * for send and receive data, and local host information.
- * Return error.  If no error make socket point at pcb.
- */
-in_pcbattach(so, head, sndcc, rcvcc, sin)
+in_pcbreserve(so, sndcc, rcvcc)

        struct socket *so;
        struct socket *so;

-       struct inpcb *head;

        int sndcc, rcvcc;
        int sndcc, rcvcc;

-       struct sockaddr_in *sin;
+{
+
+       if (sbreserve(&so->so_snd, sndcc) == 0)
+               goto bad;
+       if (sbreserve(&so->so_rcv, rcvcc) == 0)
+               goto bad2;
+       return (0);
+bad2:
+       sbrelease(&so->so_snd);
+bad:
+       return (ENOBUFS);
+}
+
+in_pcballoc(so, head)
+       struct socket *so;
+       struct inpcb *head;

 {
        struct mbuf *m;
        register struct inpcb *inp;
 {
        struct mbuf *m;
        register struct inpcb *inp;

+
+       m = m_getclr(M_DONTWAIT);
+       if (m == 0)
+               return (ENOBUFS);
+       inp = mtod(m, struct inpcb *);
+       inp->inp_head = head;
+       inp->inp_socket = so;
+       insque(inp, head);
+       so->so_pcb = (caddr_t)inp;
+       return (0);
+}
+       
+in_pcbbind(inp, nam)
+       register struct inpcb *inp;
+       struct mbuf *nam;
+{
+       register struct socket *so = inp->inp_socket;
+       register struct inpcb *head = inp->inp_head;
+       register struct sockaddr_in *sin;

        u_short lport = 0;
 
        u_short lport = 0;
 

-COUNT(IN_PCBATTACH);

        if (ifnet == 0)
                return (EADDRNOTAVAIL);
        if (ifnet == 0)
                return (EADDRNOTAVAIL);

-       if (sin) {
-               if (sin->sin_family != AF_INET)
-                       return (EAFNOSUPPORT);
-               if (sin->sin_addr.s_addr) {
-                       int tport = sin->sin_port;
+       if (inp->inp_lport || inp->inp_laddr.s_addr)
+               return (EINVAL);
+       if (nam == 0)
+               goto noname;
+       sin = mtod(nam, struct sockaddr_in *);
+       if (nam->m_len != sizeof (*sin))
+               return (EINVAL);
+       if (sin->sin_addr.s_addr) {
+               int tport = sin->sin_port;
+
+               sin->sin_port = 0;              /* yech... */
+               if (if_ifwithaddr((struct sockaddr *)sin) == 0)
+                       return (EADDRNOTAVAIL);
+               sin->sin_port = tport;
+       }
+       lport = sin->sin_port;
+       if (lport) {
+               u_short aport = lport;
+               int wild = 0;

 
 

-                       sin->sin_port = 0;              /* yech... */
-                       if (if_ifwithaddr((struct sockaddr *)sin) == 0)
-                               return (EADDRNOTAVAIL);
-                       sin->sin_port = tport;
-               }
-               lport = sin->sin_port;
-               if (lport) {
-                       u_short aport = lport;
-                       int wild = 0;

 #if vax
 #if vax

-                       aport = htons(aport);
+               aport = htons(aport);

 #endif
 #endif

-                       /* GROSS */
-                       if (aport < IPPORT_RESERVED && u.u_uid != 0)
-                               return (EPERM);
-                       if ((so->so_proto->pr_flags & PR_CONNREQUIRED) == 0 ||
-                           (so->so_options & SO_ACCEPTCONN) == 0)
-                               wild = INPLOOKUP_WILDCARD;
-                       if (in_pcblookup(head,
-                           zeroin_addr, 0, sin->sin_addr, lport, wild))
-                               return (EADDRINUSE);
-               }
+               /* GROSS */
+               if (aport < IPPORT_RESERVED && u.u_uid != 0)
+                       return (EACCES);
+               if ((so->so_proto->pr_flags & PR_CONNREQUIRED) == 0)
+                       wild = INPLOOKUP_WILDCARD;
+               if (in_pcblookup(head,
+                   zeroin_addr, 0, sin->sin_addr, lport, wild))
+                       return (EADDRINUSE);

        }
        }

-       m = m_getclr(M_DONTWAIT);
-       if (m == 0)
-               return (ENOBUFS);
-       if (sbreserve(&so->so_snd, sndcc) == 0)
-               goto bad;
-       if (sbreserve(&so->so_rcv, rcvcc) == 0)
-               goto bad2;
-       inp = mtod(m, struct inpcb *);
-       inp->inp_head = head;
-       if (sin)
-               inp->inp_laddr = sin->sin_addr;
+       inp->inp_laddr = sin->sin_addr;
+noname:

        if (lport == 0)
                do {
                        if (head->inp_lport++ < IPPORT_RESERVED)
        if (lport == 0)
                do {
                        if (head->inp_lport++ < IPPORT_RESERVED)


@@ -114,16 +103,7 @@ COUNT(IN_PCBATTACH);
                } while (in_pcblookup(head,
                            zeroin_addr, 0, inp->inp_laddr, lport, 0));
        inp->inp_lport = lport;
                } while (in_pcblookup(head,
                            zeroin_addr, 0, inp->inp_laddr, lport, 0));
        inp->inp_lport = lport;

-       inp->inp_socket = so;
-       insque(inp, head);
-       so->so_pcb = (caddr_t)inp;
-       in_setsockaddr(inp);

        return (0);
        return (0);

-bad2:
-       sbrelease(&so->so_snd);
-bad:
-       (void) m_free(m);
-       return (ENOBUFS);

 }
 
 /*
 }
 
 /*


@@ -132,24 +112,32 @@ bad:
  * If don't have a local address for this socket yet,
  * then pick one.
  */
  * If don't have a local address for this socket yet,
  * then pick one.
  */

-in_pcbconnect(inp, sin)
+in_pcbconnect(inp, nam)

        struct inpcb *inp;
        struct inpcb *inp;

-       struct sockaddr_in *sin;
+       struct mbuf *nam;

 {
        struct ifnet *ifp;
        struct sockaddr_in *ifaddr;
 {
        struct ifnet *ifp;
        struct sockaddr_in *ifaddr;

+       register struct sockaddr_in *sin = mtod(nam, struct sockaddr_in *);

 
 

-COUNT(IN_PCBCONNECT);
+       if (nam->m_len != sizeof (*sin))
+               return (EINVAL);

        if (sin->sin_family != AF_INET)
                return (EAFNOSUPPORT);
        if (sin->sin_addr.s_addr == 0 || sin->sin_port == 0)
                return (EADDRNOTAVAIL);
        if (inp->inp_laddr.s_addr == 0) {
        if (sin->sin_family != AF_INET)
                return (EAFNOSUPPORT);
        if (sin->sin_addr.s_addr == 0 || sin->sin_port == 0)
                return (EADDRNOTAVAIL);
        if (inp->inp_laddr.s_addr == 0) {

-               ifp = if_ifonnetof(sin->sin_addr.s_net);
+               ifp = if_ifonnetof(in_netof(sin->sin_addr));

                if (ifp == 0) {
                if (ifp == 0) {

+                       /*
+                        * We should select the interface based on
+                        * the route to be used, but for udp this would
+                        * result in two calls to rtalloc for each packet
+                        * sent; hardly worthwhile...
+                        */

                        ifp = if_ifwithaf(AF_INET);
                        if (ifp == 0)
                        ifp = if_ifwithaf(AF_INET);
                        if (ifp == 0)

-                               return (EADDRNOTAVAIL);         /* XXX */
+                               return (EADDRNOTAVAIL);

                }
                ifaddr = (struct sockaddr_in *)&ifp->if_addr;
        }
                }
                ifaddr = (struct sockaddr_in *)&ifp->if_addr;
        }


@@ -160,37 +148,20 @@ COUNT(IN_PCBCONNECT);
            inp->inp_lport,
            0))
                return (EADDRINUSE);
            inp->inp_lport,
            0))
                return (EADDRINUSE);

-       if (inp->inp_laddr.s_addr == 0) {
-               struct sockaddr_in *sin2 =
-                   (struct sockaddr_in *)&inp->inp_socket->so_addr;
-
+       if (inp->inp_laddr.s_addr == 0)

                inp->inp_laddr = ifaddr->sin_addr;
                inp->inp_laddr = ifaddr->sin_addr;

-               sin2->sin_addr = inp->inp_laddr;
-       }

        inp->inp_faddr = sin->sin_addr;
        inp->inp_fport = sin->sin_port;
        return (0);
 }
 
        inp->inp_faddr = sin->sin_addr;
        inp->inp_fport = sin->sin_port;
        return (0);
 }
 

-in_setsockaddr(inp)
-       struct inpcb *inp;
-{
-       register struct sockaddr_in *sin =
-           (struct sockaddr_in *)&inp->inp_socket->so_addr;
-
-       sin->sin_family = AF_INET;
-       sin->sin_addr = inp->inp_laddr;
-       sin->sin_port = inp->inp_lport;
-}
-

 in_pcbdisconnect(inp)
        struct inpcb *inp;
 {
 
 in_pcbdisconnect(inp)
        struct inpcb *inp;
 {
 

-COUNT(IN_PCBDISCONNECT);

        inp->inp_faddr.s_addr = 0;
        inp->inp_fport = 0;
        inp->inp_faddr.s_addr = 0;
        inp->inp_fport = 0;

-       if (inp->inp_socket->so_state & SS_USERGONE)
+       if (inp->inp_socket->so_state & SS_NOFDREF)

                in_pcbdetach(inp);
 }
 
                in_pcbdetach(inp);
 }
 


@@ -202,14 +173,55 @@ in_pcbdetach(inp)
        so->so_pcb = 0;
        sofree(so);
        if (inp->inp_route.ro_rt)
        so->so_pcb = 0;
        sofree(so);
        if (inp->inp_route.ro_rt)

-               freeroute(inp->inp_route.ro_rt);
+               rtfree(inp->inp_route.ro_rt);

        remque(inp);
        (void) m_free(dtom(inp));
 }
 
        remque(inp);
        (void) m_free(dtom(inp));
 }
 

+in_setsockaddr(inp, nam)
+       register struct inpcb *inp;
+       struct mbuf *nam;
+{
+       register struct sockaddr_in *sin = mtod(nam, struct sockaddr_in *);
+       
+       nam->m_len = sizeof (*sin);
+       sin = mtod(nam, struct sockaddr_in *);
+       bzero((caddr_t)sin, sizeof (*sin));
+       sin->sin_family = AF_INET;
+       sin->sin_port = inp->inp_lport;
+       sin->sin_addr = inp->inp_laddr;
+}
+

 /*
 /*

- * SHOULD ALLOW MATCH ON MULTI-HOMING ONLY
+ * Pass an error to all internet connections
+ * associated with address sin.  Call the
+ * protocol specific routine to clean up the
+ * mess afterwards.

  */
  */

+in_pcbnotify(head, dst, errno, abort)
+       struct inpcb *head;
+       register struct in_addr *dst;
+       int errno, (*abort)();
+{
+       register struct inpcb *inp, *oinp;
+       int s = splimp();
+
+       for (inp = head->inp_next; inp != head;) {
+               if (inp->inp_faddr.s_addr != dst->s_addr) {
+       next:
+                       inp = inp->inp_next;
+                       continue;
+               }
+               if (inp->inp_socket == 0)
+                       goto next;
+               inp->inp_socket->so_error = errno;
+               oinp = inp;
+               inp = inp->inp_next;
+               (*abort)(oinp);
+       }
+       splx(s);
+}
+

 struct inpcb *
 in_pcblookup(head, faddr, fport, laddr, lport, flags)
        struct inpcb *head;
 struct inpcb *
 in_pcblookup(head, faddr, fport, laddr, lport, flags)
        struct inpcb *head;