lint

[unix-history] / usr / src / sys / kern / uipc_proto.c

/*      uipc_proto.c    4.4     81/11/16        */

#include "../h/param.h"
#include "../h/socket.h"
#include "../h/protocol.h"
#include "../h/protosw.h"
#include "../h/mbuf.h"
#include "../net/inet.h"

/*
* Protocol configuration table and routines to search it.
*
* SHOULD INCLUDE A HEADER FILE GIVING DESIRED PROTOCOLS
*/

/*
* Local protocol handler.
*/
int     pi_usrreq();

/*
* TCP/IP protocol family: IP, ICMP, UDP, TCP.
*/
int     ip_input(),ip_output();
int     ip_init(),ip_slowtimo(),ip_drain();
int     icmp_input();
int     icmp_drain();
int     udp_input(),udp_ctlinput();
int     udp_usrreq(),udp_sense();
int     udp_init();
int     tcp_input(),tcp_ctlinput();
int     tcp_usrreq(),tcp_sense();
int     tcp_init(),tcp_fasttimo(),tcp_slowtimo(),tcp_drain();
int     ri_input(),ri_ctlinput();
int     ri_usrreq(),ri_sense();

struct protosw protosw[] = {
{ SOCK_STREAM,  PF_LOCAL,       0,              PR_CONNREQUIRED,
 0,            0,              0,              0,
 pi_usrreq,    0,              0,
 0,            0,              0,              0,
},
{ SOCK_DGRAM,   PF_LOCAL,       0,              PR_ATOMIC|PR_ADDR,
 0,            0,              0,              0,
 pi_usrreq,    0,              0,
 0,            0,              0,              0,
},
{ SOCK_RDM,     PF_LOCAL,       0,              PR_ATOMIC|PR_ADDR,
 0,            0,              0,              0,
 pi_usrreq,    0,              0,
 0,            0,              0,              0,
},
{ SOCK_RAW,     PF_LOCAL,       0,              PR_ATOMIC|PR_ADDR,
 0,            0,              0,              0,
 pi_usrreq,    0,              0,
 0,            0,              0,              0,
},
{ 0,            0,              0,              0,
 ip_input,     ip_output,      0,              0,
 0,            0,              0,
 ip_init,      0,              ip_slowtimo,    ip_drain,
},
{ 0,            0,              IPPROTO_ICMP,   0,
 icmp_input,   0,              0,              0,
 0,            0,              0,
 0,            0,              0,              icmp_drain,
},
{ SOCK_DGRAM,   PF_INET,        IPPROTO_UDP,    PR_ATOMIC|PR_ADDR,
 udp_input,    0,              udp_ctlinput,   0,
 udp_usrreq,   udp_sense,      MLEN,
 udp_init,     0,              0,              0,
},
{ SOCK_STREAM,  PF_INET,        IPPROTO_TCP,    PR_CONNREQUIRED,
 tcp_input,    0,              tcp_ctlinput,   0,
 tcp_usrreq,   tcp_sense,      MLEN,
 tcp_init,     tcp_fasttimo,   tcp_slowtimo,   tcp_drain,
},
{ SOCK_RAW,     PF_INET,        IPPROTO_RAW,    PR_ATOMIC|PR_ADDR,
 ri_input,     0,              ri_ctlinput,    0,
 ri_usrreq,    ri_sense,       MLEN,
 0,            0,              0,              0,
}
};

#define NPROTOSW        (sizeof(protosw) / sizeof(protosw[0]))

struct  protosw *protoswLAST = &protosw[NPROTOSW-1];

/*
* Operations on protocol table and protocol families.
*/

/*
* Initialize all protocols.
*/
pfinit()
{
       register struct protosw *pr;

       for (pr = protoswLAST; pr >= protosw; pr--)
               if (pr->pr_init)
                       (*pr->pr_init)();
}

/*
* Find a standard protocol in a protocol family
* of a specific type.
*/
struct protosw *
pffindtype(family, type)
       int family, type;
{
       register struct protosw *pr;

       if (family == 0)
               return (0);
       for (pr = protosw; pr < protoswLAST; pr++)
               if (pr->pr_family == family && pr->pr_type == type)
                       return (pr);
       return (0);
}

/*
* Find a specified protocol in a specified protocol family.
*/
struct protosw *
pffindproto(family, protocol)
       int family, protocol;
{
       register struct protosw *pr;

       if (family == 0)
               return (0);
       for (pr = protosw; pr < protoswLAST; pr++)
               if (pr->pr_family == family && pr->pr_protocol == protocol)
                       return (pr);
       return (0);
}