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[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 15d39f6..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 4.5 81/11/20 */
+/*     in_pcb.c        4.32    82/10/09        */
 
 #include "../h/param.h"
 #include "../h/systm.h"
 
 #include "../h/param.h"
 #include "../h/systm.h"
@@ -7,128 +7,262 @@
 #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/inet.h"
-#include "../net/inet_systm.h"
+#include "../netinet/in.h"
+#include "../netinet/in_systm.h"
 #include "../net/if.h"
 #include "../net/if.h"
-#include "../net/inet_pcb.h"
+#include "../net/route.h"
+#include "../netinet/in_pcb.h"
+#include "../h/protosw.h"
 
 
-/*
- * 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_pcballoc(so, head, sndcc, rcvcc, sin)
+struct in_addr zeroin_addr;
+
+in_pcbreserve(so, sndcc, rcvcc)
        struct socket *so;
        struct socket *so;
-       struct inpcb *head;
        int sndcc, rcvcc;
        int sndcc, rcvcc;
-       struct sockaddr_in *sin;
 {
 {
-       struct mbuf *m;
-       register struct inpcb *inp;
-       struct ifnet *ifp;
-       u_long lport;
 
 
-       if (sin) {
-               if (sin->sin_family != AF_INET)
-                       return (EAFNOSUPPORT);
-               ifp = if_ifwithaddr(sin->sin_addr);
-               if (ifp == 0)
-                       return (EADDRNOTAVAIL);
-               lport = sin->sin_port;
-               if (lport) {
-                       inp = head->inp_next;
-                       for (; inp != head; inp = inp->inp_next) 
-                               if (inp->inp_laddr.s_addr ==
-                                   sin->sin_addr.s_addr &&
-                                   inp->inp_lport == lport &&
-                                   inp->inp_faddr.s_addr == 0)
-                                       return (EADDRINUSE);
-               }
-       } else {
-               ifp = if_ifwithaddr(ifnet->if_addr);
-               lport = 0;
-       }
-       m = m_getclr(M_WAIT);
-       if (m == 0)
-               return (0);
        if (sbreserve(&so->so_snd, sndcc) == 0)
                goto bad;
        if (sbreserve(&so->so_rcv, rcvcc) == 0)
                goto bad2;
        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_laddr = ifp->if_addr;
-       if (lport)
-               goto gotport;
-again:
-       if (head->inp_lport++ < 1024)
-               head->inp_lport = 1024;
-       for (inp = head->inp_next; inp != head; inp = inp->inp_next)
-               if (inp->inp_lport == head->inp_lport)
-                       goto again;
-       lport = head->inp_lport;
-gotport:
-       inp->inp_lport = lport;
-       insque(head, inp);
-       so->so_pcb = (caddr_t)inp;
-       sin = (struct sockaddr_in *)&so->so_addr;
-       sin->sin_family = AF_INET;
-       sin->sin_addr = inp->inp_laddr;
-       sin->sin_port = inp->inp_lport;
        return (0);
 bad2:
        sbrelease(&so->so_snd);
 bad:
        return (0);
 bad2:
        sbrelease(&so->so_snd);
 bad:
-       m_free(m);
        return (ENOBUFS);
 }
 
        return (ENOBUFS);
 }
 
-in_pcbsetpeer(inp, sin)
+in_pcballoc(so, head)
+       struct socket *so;
+       struct inpcb *head;
+{
+       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;
+
+       if (ifnet == 0)
+               return (EADDRNOTAVAIL);
+       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;
+
+#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)
+                       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)
+                               head->inp_lport = IPPORT_RESERVED;
+                       lport = htons(head->inp_lport);
+               } while (in_pcblookup(head,
+                           zeroin_addr, 0, inp->inp_laddr, lport, 0));
+       inp->inp_lport = lport;
+       return (0);
+}
+
+/*
+ * Connect from a socket to a specified address.
+ * Both address and port must be specified in argument sin.
+ * If don't have a local address for this socket yet,
+ * then pick one.
+ */
+in_pcbconnect(inp, nam)
        struct inpcb *inp;
        struct inpcb *inp;
-       struct sockaddr_in *sin;
+       struct mbuf *nam;
 {
 {
+       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_addr.s_addr == 0 || sin->sin_port == 0)
                return (EADDRNOTAVAIL);
        if (sin->sin_family != AF_INET)
                return (EAFNOSUPPORT);
        if (sin->sin_addr.s_addr == 0 || sin->sin_port == 0)
                return (EADDRNOTAVAIL);
-       /* should check not already in use... */
+       if (inp->inp_laddr.s_addr == 0) {
+               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)
+                               return (EADDRNOTAVAIL);
+               }
+               ifaddr = (struct sockaddr_in *)&ifp->if_addr;
+       }
+       if (in_pcblookup(inp->inp_head,
+           sin->sin_addr,
+           sin->sin_port,
+           inp->inp_laddr.s_addr ? inp->inp_laddr : ifaddr->sin_addr,
+           inp->inp_lport,
+           0))
+               return (EADDRINUSE);
+       if (inp->inp_laddr.s_addr == 0)
+               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);
 }
 
-in_pcbfree(inp)
+in_pcbdisconnect(inp)
+       struct inpcb *inp;
+{
+
+       inp->inp_faddr.s_addr = 0;
+       inp->inp_fport = 0;
+       if (inp->inp_socket->so_state & SS_NOFDREF)
+               in_pcbdetach(inp);
+}
+
+in_pcbdetach(inp)
        struct inpcb *inp;
 {
        struct socket *so = inp->inp_socket;
 
        struct inpcb *inp;
 {
        struct socket *so = inp->inp_socket;
 
-       if (so->so_state & SS_USERGONE)
-               sofree(so);
-       else
-               so->so_pcb = 0;
+       so->so_pcb = 0;
+       sofree(so);
+       if (inp->inp_route.ro_rt)
+               rtfree(inp->inp_route.ro_rt);
+       remque(inp);
        (void) m_free(dtom(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;
+}
+
+/*
+ * 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 *
 struct inpcb *
-in_pcblookup(head, faddr, fport, laddr, lport)
+in_pcblookup(head, faddr, fport, laddr, lport, flags)
        struct inpcb *head;
        struct in_addr faddr, laddr;
        u_short fport, lport;
        struct inpcb *head;
        struct in_addr faddr, laddr;
        u_short fport, lport;
+       int flags;
 {
 {
-       register struct inpcb *inp;
+       register struct inpcb *inp, *match = 0;
+       int matchwild = 3, wildcard;
 
 
-       for (inp = head->inp_next; inp != head; inp = inp->inp_next)
-               if (inp->inp_faddr.s_addr == faddr.s_addr &&
-                   inp->inp_fport == fport &&
-                   inp->inp_laddr.s_addr == laddr.s_addr &&
-                   inp->inp_lport == lport)
-                       return (inp);
-       for (inp = head->inp_next; inp != head; inp = inp->inp_next)
-               if ((inp->inp_faddr.s_addr == faddr.s_addr ||
-                    inp->inp_faddr.s_addr == 0) &&
-                   (inp->inp_fport == fport || inp->inp_fport == 0) &&
-                    inp->inp_laddr.s_addr == laddr.s_addr &&
-                   (inp->inp_lport == lport || inp->inp_lport == 0))
-                       return (inp);
-       return (0);
+       for (inp = head->inp_next; inp != head; inp = inp->inp_next) {
+               if (inp->inp_lport != lport)
+                       continue;
+               wildcard = 0;
+               if (inp->inp_laddr.s_addr != 0) {
+                       if (laddr.s_addr == 0)
+                               wildcard++;
+                       else if (inp->inp_laddr.s_addr != laddr.s_addr)
+                               continue;
+               } else {
+                       if (laddr.s_addr != 0)
+                               wildcard++;
+               }
+               if (inp->inp_faddr.s_addr != 0) {
+                       if (faddr.s_addr == 0)
+                               wildcard++;
+                       else if (inp->inp_faddr.s_addr != faddr.s_addr ||
+                           inp->inp_fport != fport)
+                               continue;
+               } else {
+                       if (faddr.s_addr != 0)
+                               wildcard++;
+               }
+               if (wildcard && (flags & INPLOOKUP_WILDCARD) == 0)
+                       continue;
+               if (wildcard < matchwild) {
+                       match = inp;
+                       matchwild = wildcard;
+                       if (matchwild == 0)
+                               break;
+               }
+       }
+       return (match);
 }
 }
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.