minor fixes

[unix-history] / usr / src / sys / net / raw_cb.c

/*      raw_cb.c        4.4     82/03/05        */

#include "../h/param.h"
#include "../h/systm.h"
#include "../h/mbuf.h"
#include "../h/socket.h"
#include "../h/socketvar.h"
#include "../h/mtpr.h"
#include "../net/in.h"
#include "../net/in_systm.h"
#include "../net/if.h"
#include "../net/raw_cb.h"
#include "../errno.h"

/*
* Routines to manage the raw protocol control blocks. 
*
* TODO:
*      hash lookups by protocol family/protocol + address family
*      take care of unique address problems per AF
*      redo address binding to allow wildcards
*/

/*
* Allocate a control block and a nominal amount
* of buffer space for the socket.
*/
raw_attach(so, addr)
       register struct socket *so;
       struct sockaddr *addr;
{
       struct mbuf *m;
       register struct rawcb *rp;
       struct ifnet *ifp = ifnet;

COUNT(RAW_ATTACH);
       /*
        * Should we verify address not already in use?
        * Some say yes, others no.
        */
       if (addr) switch (addr->sa_family) {

       case AF_IMPLINK:
       case AF_INET: {
               register struct sockaddr_in *sin = (struct sockaddr_in *)addr;

               if (ifnet && sin->sin_addr.s_addr == 0)
                       sin->sin_addr = ifnet->if_addr;
               ifp = if_ifwithaddr(sin->sin_addr);
               break;
               }

       case AF_PUP:
               ifp = ifnet;
               break;

       default:
               return (EAFNOSUPPORT);
       }
       if (ifp == 0)
               return (EADDRNOTAVAIL);
       m = m_getclr(M_DONTWAIT);
       if (m == 0)
               return (ENOBUFS);
       if (sbreserve(&so->so_snd, RAWSNDQ) == 0)
               goto bad;
       if (sbreserve(&so->so_rcv, RAWRCVQ) == 0)
               goto bad2;
       rp = mtod(m, struct rawcb *);
       rp->rcb_socket = so;
       insque(rp, &rawcb);
       so->so_pcb = (caddr_t)rp;
       rp->rcb_pcb = 0;

       if (addr)
               bcopy(addr, &so->so_addr, sizeof(*addr));
       return (0);
bad2:
       sbrelease(&so->so_snd);
bad:
       (void) m_free(m);
       return (ENOBUFS);
}

/*
* Detach the raw connection block and discard
* socket resources.
*/
raw_detach(rp)
       register struct rawcb *rp;
{
       struct socket *so = rp->rcb_socket;

COUNT(RAW_DETACH);
       so->so_pcb = 0;
       sofree(so);
       remque(rp);
       (void) m_freem(dtom(rp));
}

/*
* Disconnect and possibly release resources.
*/
raw_disconnect(rp)
       struct rawcb *rp;
{
COUNT(RAW_DISCONNECT);
       rp->rcb_flags &= ~RAW_ADDR;
       if (rp->rcb_socket->so_state & SS_USERGONE)
               raw_detach(rp);
}

/*
* Associate a peer's address with a
* raw connection block.
*/
raw_connaddr(rp, addr)
       struct rawcb *rp;
       struct sockaddr *addr;
{
COUNT(RAW_CONNADDR);
       bcopy(addr, &rp->rcb_addr, sizeof(struct sockaddr));
       rp->rcb_flags |= RAW_ADDR;
}