BSD 4_3_Tahoe release

[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 3f2b52d..a7211cc 100644 (file)
--- a/usr/src/sys/netinet/in_pcb.c
+++ b/usr/src/sys/netinet/in_pcb.c
@@ -1,4 +1,21 @@
-/*     in_pcb.c        6.2     84/08/29        */
+/*
+ * Copyright (c) 1982, 1986 Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by the University of California, Berkeley.  The name of the
+ * University may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ *     @(#)in_pcb.c    7.7 (Berkeley) 6/29/88
+ */

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


@@ -7,11 +24,13 @@
 #include "mbuf.h"
 #include "socket.h"
 #include "socketvar.h"
 #include "mbuf.h"
 #include "socket.h"
 #include "socketvar.h"

+#include "ioctl.h"

 #include "in.h"
 #include "in_systm.h"
 #include "../net/if.h"
 #include "../net/route.h"
 #include "in_pcb.h"
 #include "in.h"
 #include "in_systm.h"
 #include "../net/if.h"
 #include "../net/route.h"
 #include "in_pcb.h"

+#include "in_var.h"

 #include "protosw.h"
 
 struct in_addr zeroin_addr;
 #include "protosw.h"
 
 struct in_addr zeroin_addr;


@@ -43,7 +62,7 @@ in_pcbbind(inp, nam)
        register struct sockaddr_in *sin;
        u_short lport = 0;
 
        register struct sockaddr_in *sin;
        u_short lport = 0;
 

-       if (ifnet == 0)
+       if (in_ifaddr == 0)

                return (EADDRNOTAVAIL);
        if (inp->inp_lport || inp->inp_laddr.s_addr != INADDR_ANY)
                return (EINVAL);
                return (EADDRNOTAVAIL);
        if (inp->inp_lport || inp->inp_laddr.s_addr != INADDR_ANY)
                return (EINVAL);


@@ -56,13 +75,13 @@ in_pcbbind(inp, nam)
                int tport = sin->sin_port;
 
                sin->sin_port = 0;              /* yech... */
                int tport = sin->sin_port;
 
                sin->sin_port = 0;              /* yech... */

-               if (if_ifwithaddr((struct sockaddr *)sin) == 0)
+               if (ifa_ifwithaddr((struct sockaddr *)sin) == 0)

                        return (EADDRNOTAVAIL);
                sin->sin_port = tport;
        }
        lport = sin->sin_port;
        if (lport) {
                        return (EADDRNOTAVAIL);
                sin->sin_port = tport;
        }
        lport = sin->sin_port;
        if (lport) {

-               u_short aport = htons(lport);
+               u_short aport = ntohs(lport);

                int wild = 0;
 
                /* GROSS */
                int wild = 0;
 
                /* GROSS */


@@ -81,7 +100,8 @@ in_pcbbind(inp, nam)
 noname:
        if (lport == 0)
                do {
 noname:
        if (lport == 0)
                do {

-                       if (head->inp_lport++ < IPPORT_RESERVED)
+                       if (head->inp_lport++ < IPPORT_RESERVED ||
+                           head->inp_lport > IPPORT_USERRESERVED)

                                head->inp_lport = IPPORT_RESERVED;
                        lport = htons(head->inp_lport);
                } while (in_pcblookup(head,
                                head->inp_lport = IPPORT_RESERVED;
                        lport = htons(head->inp_lport);
                } while (in_pcblookup(head,


@@ -97,10 +117,10 @@ noname:
  * then pick one.
  */
 in_pcbconnect(inp, nam)
  * then pick one.
  */
 in_pcbconnect(inp, nam)

-       struct inpcb *inp;
+       register struct inpcb *inp;

        struct mbuf *nam;
 {
        struct mbuf *nam;
 {

-       struct ifnet *ifp;
+       struct in_ifaddr *ia;

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


@@ -108,22 +128,75 @@ in_pcbconnect(inp, nam)
                return (EINVAL);
        if (sin->sin_family != AF_INET)
                return (EAFNOSUPPORT);
                return (EINVAL);
        if (sin->sin_family != AF_INET)
                return (EAFNOSUPPORT);

-       if (sin->sin_addr.s_addr == INADDR_ANY || sin->sin_port == 0)
+       if (sin->sin_port == 0)

                return (EADDRNOTAVAIL);
                return (EADDRNOTAVAIL);

+       if (in_ifaddr) {
+               /*
+                * If the destination address is INADDR_ANY,
+                * use the primary local address.
+                * If the supplied address is INADDR_BROADCAST,
+                * and the primary interface supports broadcast,
+                * choose the broadcast address for that interface.
+                */
+#define        satosin(sa)     ((struct sockaddr_in *)(sa))
+               if (sin->sin_addr.s_addr == INADDR_ANY)
+                   sin->sin_addr = IA_SIN(in_ifaddr)->sin_addr;
+               else if (sin->sin_addr.s_addr == (u_long)INADDR_BROADCAST &&
+                 (in_ifaddr->ia_ifp->if_flags & IFF_BROADCAST))
+                   sin->sin_addr = satosin(&in_ifaddr->ia_broadaddr)->sin_addr;
+       }

        if (inp->inp_laddr.s_addr == INADDR_ANY) {
        if (inp->inp_laddr.s_addr == INADDR_ANY) {

-               ifp = if_ifonnetof(in_netof(sin->sin_addr));
-               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)
+               register struct route *ro;
+               struct ifnet *ifp;
+
+               ia = (struct in_ifaddr *)0;
+               /* 
+                * If route is known or can be allocated now,
+                * our src addr is taken from the i/f, else punt.
+                */
+               ro = &inp->inp_route;
+               if (ro->ro_rt &&
+                   (satosin(&ro->ro_dst)->sin_addr.s_addr !=
+                       sin->sin_addr.s_addr || 
+                   inp->inp_socket->so_options & SO_DONTROUTE)) {
+                       RTFREE(ro->ro_rt);
+                       ro->ro_rt = (struct rtentry *)0;
+               }
+               if ((inp->inp_socket->so_options & SO_DONTROUTE) == 0 && /*XXX*/
+                   (ro->ro_rt == (struct rtentry *)0 ||
+                   ro->ro_rt->rt_ifp == (struct ifnet *)0)) {
+                       /* No route yet, so try to acquire one */
+                       ro->ro_dst.sa_family = AF_INET;
+                       ((struct sockaddr_in *) &ro->ro_dst)->sin_addr =
+                               sin->sin_addr;
+                       rtalloc(ro);
+               }
+               /*
+                * If we found a route, use the address
+                * corresponding to the outgoing interface
+                * unless it is the loopback (in case a route
+                * to our address on another net goes to loopback).
+                */
+               if (ro->ro_rt && (ifp = ro->ro_rt->rt_ifp) &&
+                   (ifp->if_flags & IFF_LOOPBACK) == 0)
+                       for (ia = in_ifaddr; ia; ia = ia->ia_next)
+                               if (ia->ia_ifp == ifp)
+                                       break;
+               if (ia == 0) {
+                       int fport = sin->sin_port;
+
+                       sin->sin_port = 0;
+                       ia = (struct in_ifaddr *)
+                           ifa_ifwithdstaddr((struct sockaddr *)sin);
+                       sin->sin_port = fport;
+                       if (ia == 0)
+                               ia = in_iaonnetof(in_netof(sin->sin_addr));
+                       if (ia == 0)
+                               ia = in_ifaddr;
+                       if (ia == 0)

                                return (EADDRNOTAVAIL);
                }
                                return (EADDRNOTAVAIL);
                }

-               ifaddr = (struct sockaddr_in *)&ifp->if_addr;
+               ifaddr = (struct sockaddr_in *)&ia->ia_addr;

        }
        if (in_pcblookup(inp->inp_head,
            sin->sin_addr,
        }
        if (in_pcblookup(inp->inp_head,
            sin->sin_addr,


@@ -134,7 +207,7 @@ in_pcbconnect(inp, nam)
                return (EADDRINUSE);
        if (inp->inp_laddr.s_addr == INADDR_ANY) {
                if (inp->inp_lport == 0)
                return (EADDRINUSE);
        if (inp->inp_laddr.s_addr == INADDR_ANY) {
                if (inp->inp_lport == 0)

-                       in_pcbbind(inp, (struct mbuf *)0);
+                       (void)in_pcbbind(inp, (struct mbuf *)0);

                inp->inp_laddr = ifaddr->sin_addr;
        }
        inp->inp_faddr = sin->sin_addr;
                inp->inp_laddr = ifaddr->sin_addr;
        }
        inp->inp_faddr = sin->sin_addr;


@@ -159,6 +232,8 @@ in_pcbdetach(inp)
 
        so->so_pcb = 0;
        sofree(so);
 
        so->so_pcb = 0;
        sofree(so);

+       if (inp->inp_options)
+               (void)m_free(inp->inp_options);

        if (inp->inp_route.ro_rt)
                rtfree(inp->inp_route.ro_rt);
        remque(inp);
        if (inp->inp_route.ro_rt)
                rtfree(inp->inp_route.ro_rt);
        remque(inp);


@@ -169,7 +244,7 @@ in_setsockaddr(inp, nam)
        register struct inpcb *inp;
        struct mbuf *nam;
 {
        register struct inpcb *inp;
        struct mbuf *nam;
 {

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

        
        nam->m_len = sizeof (*sin);
        sin = mtod(nam, struct sockaddr_in *);
        
        nam->m_len = sizeof (*sin);
        sin = mtod(nam, struct sockaddr_in *);


@@ -180,10 +255,10 @@ in_setsockaddr(inp, nam)
 }
 
 in_setpeeraddr(inp, nam)
 }
 
 in_setpeeraddr(inp, nam)

-       register struct inpcb *inp;
+       struct inpcb *inp;

        struct mbuf *nam;
 {
        struct mbuf *nam;
 {

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

        
        nam->m_len = sizeof (*sin);
        sin = mtod(nam, struct sockaddr_in *);
        
        nam->m_len = sizeof (*sin);
        sin = mtod(nam, struct sockaddr_in *);


@@ -194,35 +269,74 @@ in_setpeeraddr(inp, nam)
 }
 
 /*
 }
 
 /*

- * Pass an error to all internet connections
- * associated with address sin.  Call the
- * protocol specific routine to clean up the
- * mess afterwards.
+ * Pass some notification to all connections of a protocol
+ * associated with address dst.  Call the protocol specific
+ * routine (if any) to handle each connection.

  */
  */

-in_pcbnotify(head, dst, errno, abort)
+in_pcbnotify(head, dst, errno, notify)

        struct inpcb *head;
        register struct in_addr *dst;
        struct inpcb *head;
        register struct in_addr *dst;

-       int errno, (*abort)();
+       int errno, (*notify)();

 {
        register struct inpcb *inp, *oinp;
        int s = splimp();
 
        for (inp = head->inp_next; inp != head;) {
 {
        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:
+               if (inp->inp_faddr.s_addr != dst->s_addr ||
+                   inp->inp_socket == 0) {

                        inp = inp->inp_next;
                        continue;
                }
                        inp = inp->inp_next;
                        continue;
                }

-               if (inp->inp_socket == 0)
-                       goto next;
-               inp->inp_socket->so_error = errno;
+               if (errno) 
+                       inp->inp_socket->so_error = errno;

                oinp = inp;
                inp = inp->inp_next;
                oinp = inp;
                inp = inp->inp_next;

-               (*abort)(oinp);
+               if (notify)
+                       (*notify)(oinp);

        }
        splx(s);
 }
 
        }
        splx(s);
 }
 

+/*
+ * Check for alternatives when higher level complains
+ * about service problems.  For now, invalidate cached
+ * routing information.  If the route was created dynamically
+ * (by a redirect), time to try a default gateway again.
+ */
+in_losing(inp)
+       struct inpcb *inp;
+{
+       register struct rtentry *rt;
+
+       if ((rt = inp->inp_route.ro_rt)) {
+               if (rt->rt_flags & RTF_DYNAMIC)
+                       (void) rtrequest((int)SIOCDELRT, rt);
+               rtfree(rt);
+               inp->inp_route.ro_rt = 0;
+               /*
+                * A new route can be allocated
+                * the next time output is attempted.
+                */
+       }
+}
+
+/*
+ * After a routing change, flush old routing
+ * and allocate a (hopefully) better one.
+ */
+in_rtchange(inp)
+       register struct inpcb *inp;
+{
+       if (inp->inp_route.ro_rt) {
+               rtfree(inp->inp_route.ro_rt);
+               inp->inp_route.ro_rt = 0;
+               /*
+                * A new route can be allocated the next time
+                * output is attempted.
+                */
+       }
+}
+

 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;