more cleanup

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

/* in_pcb.c 4.3 81/11/18 */

#include "../h/param.h"
#include "../h/mbuf.h"
#include "../h/socket.h"
#include "../h/socketvar.h"
#include "../net/inet.h"
#include "../net/inet_systm.h"
#include "../net/inet_host.h"
#include "../net/inet_pcb.h"

struct inpcb *
in_pcballoc()
{

       struct mbuf *m;

       m = m_getclr(M_WAIT);
       m->m_off = MMINOFF;
       return (mtod(m, struct inpcb *));
}

in_pcbenter(head, new)
       struct inpcb *head, *new;
{
       register struct inpcb *inp;

       for (inp = head->inp_next; inp != head; inp = inp->inp_next)
               if (inp->inp_fhost->h_addr.s_addr == new->inp_fhost.s_addr &&
                   inp->inp_fport == new->inp_fport &&
                   inp->inp_lhost->h_addr.s_addr = new->inp_fhost.s_addr &&
                   inp->inp_lport == new->inp_lport)
                       return (EADDRINUSE);
       insque(new, head);
       return (0);
}

in_pcbfree(inp)
       struct inpcb *inp;
{
       struct socket *so = inp->inp_socket;

       if (so->so_isfilerefd == 0)
               sofree(so);
       else
               so->so_pcb = 0;
       if (inp->inp_lhost)
               in_hostfree(inp->inp_lhost);
       if (inp->inp_fhost)
               in_hostfree(inp->inp_fhost);
       (void) m_free(dtom(inp));
}

struct inpcb *
in_pcblookup(head, fhost, fport, lhost, lport)
       struct inpcb *head;
       struct in_addr *fhost, *lhost;
       u_short fport, lport;
{
       register struct inpcb *inp;

       for (inp = head->inp_next; inp != head; inp = inp->inp_next)
               if (inp->inp_fhost->h_addr.s_addr == fhost->s_addr &&
                   inp->inp_fport == fport &&
                   inp->inp_lhost->h_addr.s_addr == lhost->s_addr &&
                   inp->inp_lport == lport)
                       return (inp);
       for (inp = head->inp_next; inp != head; inp = inp->inp_next)
               if ((inp->inp_fhost->h_addr.s_addr == fhost->s_addr ||
                    inp->inp_fhost == 0) &&
                   (inp->inp_fport == fport || inp->inp_fport == 0) &&
                    inp->inp_lhost->h_addr.s_addr == lhost->s_addr &&
                   (inp->inp_lport == lport || inp->inp_lport == 0))
                       return (inp);
       return (0);
}

in_pcbgenport(head)
       struct inpcb *head;
{
       register struct inpcb *inp;

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;
       return (head->inp_lport);
}