4.2 distribution

[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 6ba0ab2..fe834c8 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        4.28    82/06/20        */
+/*     in_pcb.c        6.1     83/07/29        */

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


@@ -7,104 +7,78 @@
 #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_pcballoc(so, head)

        struct socket *so;
        struct inpcb *head;
        struct socket *so;
        struct inpcb *head;

-       int sndcc, rcvcc;
-       struct sockaddr_in *sin;

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

+
+       m = m_getclr(M_DONTWAIT, MT_PCB);
+       if (m == NULL)
+               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;
 
        if (ifnet == 0)
                return (EADDRNOTAVAIL);
        u_short lport = 0;
 
        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 != INADDR_ANY)
+               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 != INADDR_ANY) {
+               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;
-#if vax
-                       aport = htons(aport);
-#endif
-                       /* GROSS */
-                       if (aport < IPPORT_RESERVED && u.u_uid != 0)
-                               return (EACCES);
-                       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);
-               }
+               sin->sin_port = 0;              /* yech... */
+               if (if_ifwithaddr((struct sockaddr *)sin) == 0)
+                       return (EADDRNOTAVAIL);
+               sin->sin_port = tport;

        }
        }

-       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;
+       lport = sin->sin_port;
+       if (lport) {
+               u_short aport = htons(lport);
+               int wild = 0;
+
+               /* GROSS */
+               if (aport < IPPORT_RESERVED && u.u_uid != 0)
+                       return (EACCES);
+               /* even GROSSER, but this is the Internet */
+               if ((so->so_options & SO_REUSEADDR) == 0 &&
+                   ((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);
+       }
+       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)


@@ -113,15 +87,7 @@ in_pcbattach(so, head, sndcc, rcvcc, sin)
                } 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;

        return (0);
        return (0);

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

 }
 
 /*
 }
 
 /*


@@ -130,18 +96,21 @@ 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 *);

 
 

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

        if (sin->sin_family != AF_INET)
                return (EAFNOSUPPORT);
        if (sin->sin_family != AF_INET)
                return (EAFNOSUPPORT);

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

                return (EADDRNOTAVAIL);
                return (EADDRNOTAVAIL);

-       if (inp->inp_laddr.s_addr == 0) {
+       if (inp->inp_laddr.s_addr == INADDR_ANY) {

                ifp = if_ifonnetof(in_netof(sin->sin_addr));
                if (ifp == 0) {
                        /*
                ifp = if_ifonnetof(in_netof(sin->sin_addr));
                if (ifp == 0) {
                        /*


@@ -163,8 +132,11 @@ in_pcbconnect(inp, sin)
            inp->inp_lport,
            0))
                return (EADDRINUSE);
            inp->inp_lport,
            0))
                return (EADDRINUSE);

-       if (inp->inp_laddr.s_addr == 0)
+       if (inp->inp_laddr.s_addr == INADDR_ANY) {
+               if (inp->inp_lport == 0)
+                       in_pcbbind(inp, (struct mbuf *)0);

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

+       }

        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);


@@ -174,9 +146,9 @@ in_pcbdisconnect(inp)
        struct inpcb *inp;
 {
 
        struct inpcb *inp;
 {
 

-       inp->inp_faddr.s_addr = 0;
+       inp->inp_faddr.s_addr = INADDR_ANY;

        inp->inp_fport = 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);
 }
 


@@ -193,18 +165,34 @@ in_pcbdetach(inp)
        (void) m_free(dtom(inp));
 }
 
        (void) m_free(dtom(inp));
 }
 

-in_setsockaddr(sin, inp)
-       register struct sockaddr_in *sin;
+in_setsockaddr(inp, nam)

        register struct inpcb *inp;
        register struct inpcb *inp;

+       struct mbuf *nam;

 {
 {

-       if (sin == 0 || inp == 0)
-               panic("setsockaddr_in");
+       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;
 }
 
        bzero((caddr_t)sin, sizeof (*sin));
        sin->sin_family = AF_INET;
        sin->sin_port = inp->inp_lport;
        sin->sin_addr = inp->inp_laddr;
 }
 

+in_setpeeraddr(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_fport;
+       sin->sin_addr = inp->inp_faddr;
+}
+

 /*
  * Pass an error to all internet connections
  * associated with address sin.  Call the
 /*
  * Pass an error to all internet connections
  * associated with address sin.  Call the


@@ -235,9 +223,6 @@ in_pcbnotify(head, dst, errno, abort)
        splx(s);
 }
 
        splx(s);
 }
 

-/*
- * SHOULD ALLOW MATCH ON MULTI-HOMING ONLY
- */

 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;


@@ -252,23 +237,23 @@ in_pcblookup(head, faddr, fport, laddr, lport, flags)
                if (inp->inp_lport != lport)
                        continue;
                wildcard = 0;
                if (inp->inp_lport != lport)
                        continue;
                wildcard = 0;

-               if (inp->inp_laddr.s_addr != 0) {
-                       if (laddr.s_addr == 0)
+               if (inp->inp_laddr.s_addr != INADDR_ANY) {
+                       if (laddr.s_addr == INADDR_ANY)

                                wildcard++;
                        else if (inp->inp_laddr.s_addr != laddr.s_addr)
                                continue;
                } else {
                                wildcard++;
                        else if (inp->inp_laddr.s_addr != laddr.s_addr)
                                continue;
                } else {

-                       if (laddr.s_addr != 0)
+                       if (laddr.s_addr != INADDR_ANY)

                                wildcard++;
                }
                                wildcard++;
                }

-               if (inp->inp_faddr.s_addr != 0) {
-                       if (faddr.s_addr == 0)
+               if (inp->inp_faddr.s_addr != INADDR_ANY) {
+                       if (faddr.s_addr == INADDR_ANY)

                                wildcard++;
                        else if (inp->inp_faddr.s_addr != faddr.s_addr ||
                            inp->inp_fport != fport)
                                continue;
                } else {
                                wildcard++;
                        else if (inp->inp_faddr.s_addr != faddr.s_addr ||
                            inp->inp_fport != fport)
                                continue;
                } else {

-                       if (faddr.s_addr != 0)
+                       if (faddr.s_addr != INADDR_ANY)

                                wildcard++;
                }
                if (wildcard && (flags & INPLOOKUP_WILDCARD) == 0)
                                wildcard++;
                }
                if (wildcard && (flags & INPLOOKUP_WILDCARD) == 0)