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in.c (1542) in.c (1549)
1/*
2 * Copyright (c) 1982, 1986, 1991, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

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29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)in.c 8.2 (Berkeley) 11/15/93
34 */
35
36#include <sys/param.h>
1/*
2 * Copyright (c) 1982, 1986, 1991, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

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29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)in.c 8.2 (Berkeley) 11/15/93
34 */
35
36#include <sys/param.h>
37#include <sys/systm.h>
37#include <sys/ioctl.h>
38#include <sys/errno.h>
39#include <sys/malloc.h>
40#include <sys/socket.h>
41#include <sys/socketvar.h>
42
43#include <net/if.h>
44#include <net/route.h>

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86#endif
87int subnetsarelocal = SUBNETSARELOCAL;
88/*
89 * Return 1 if an internet address is for a ``local'' host
90 * (one to which we have a connection). If subnetsarelocal
91 * is true, this includes other subnets of the local net.
92 * Otherwise, it includes only the directly-connected (sub)nets.
93 */
38#include <sys/ioctl.h>
39#include <sys/errno.h>
40#include <sys/malloc.h>
41#include <sys/socket.h>
42#include <sys/socketvar.h>
43
44#include <net/if.h>
45#include <net/route.h>

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87#endif
88int subnetsarelocal = SUBNETSARELOCAL;
89/*
90 * Return 1 if an internet address is for a ``local'' host
91 * (one to which we have a connection). If subnetsarelocal
92 * is true, this includes other subnets of the local net.
93 * Otherwise, it includes only the directly-connected (sub)nets.
94 */
95int
94in_localaddr(in)
95 struct in_addr in;
96{
97 register u_long i = ntohl(in.s_addr);
98 register struct in_ifaddr *ia;
99
100 if (subnetsarelocal) {
101 for (ia = in_ifaddr; ia; ia = ia->ia_next)

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109 return (0);
110}
111
112/*
113 * Determine whether an IP address is in a reserved set of addresses
114 * that may not be forwarded, or whether datagrams to that destination
115 * may be forwarded.
116 */
96in_localaddr(in)
97 struct in_addr in;
98{
99 register u_long i = ntohl(in.s_addr);
100 register struct in_ifaddr *ia;
101
102 if (subnetsarelocal) {
103 for (ia = in_ifaddr; ia; ia = ia->ia_next)

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111 return (0);
112}
113
114/*
115 * Determine whether an IP address is in a reserved set of addresses
116 * that may not be forwarded, or whether datagrams to that destination
117 * may be forwarded.
118 */
119int
117in_canforward(in)
118 struct in_addr in;
119{
120 register u_long i = ntohl(in.s_addr);
121 register u_long net;
122
123 if (IN_EXPERIMENTAL(i) || IN_MULTICAST(i))
124 return (0);

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151int in_interfaces; /* number of external internet interfaces */
152extern struct ifnet loif;
153
154/*
155 * Generic internet control operations (ioctl's).
156 * Ifp is 0 if not an interface-specific ioctl.
157 */
158/* ARGSUSED */
120in_canforward(in)
121 struct in_addr in;
122{
123 register u_long i = ntohl(in.s_addr);
124 register u_long net;
125
126 if (IN_EXPERIMENTAL(i) || IN_MULTICAST(i))
127 return (0);

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154int in_interfaces; /* number of external internet interfaces */
155extern struct ifnet loif;
156
157/*
158 * Generic internet control operations (ioctl's).
159 * Ifp is 0 if not an interface-specific ioctl.
160 */
161/* ARGSUSED */
162int
159in_control(so, cmd, data, ifp)
160 struct socket *so;
161 int cmd;
162 caddr_t data;
163 register struct ifnet *ifp;
164{
165 register struct ifreq *ifr = (struct ifreq *)data;
166 register struct in_ifaddr *ia = 0;

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390 rtinit(&(ia->ia_ifa), (int)RTM_DELETE, 0);
391 ia->ia_flags &= ~IFA_ROUTE;
392}
393
394/*
395 * Initialize an interface's internet address
396 * and routing table entry.
397 */
163in_control(so, cmd, data, ifp)
164 struct socket *so;
165 int cmd;
166 caddr_t data;
167 register struct ifnet *ifp;
168{
169 register struct ifreq *ifr = (struct ifreq *)data;
170 register struct in_ifaddr *ia = 0;

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394 rtinit(&(ia->ia_ifa), (int)RTM_DELETE, 0);
395 ia->ia_flags &= ~IFA_ROUTE;
396}
397
398/*
399 * Initialize an interface's internet address
400 * and routing table entry.
401 */
402int
398in_ifinit(ifp, ia, sin, scrub)
399 register struct ifnet *ifp;
400 register struct in_ifaddr *ia;
401 struct sockaddr_in *sin;
402 int scrub;
403{
404 register u_long i = ntohl(sin->sin_addr.s_addr);
405 struct sockaddr_in oldaddr;

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478 }
479 return (error);
480}
481
482
483/*
484 * Return 1 if the address might be a local broadcast address.
485 */
403in_ifinit(ifp, ia, sin, scrub)
404 register struct ifnet *ifp;
405 register struct in_ifaddr *ia;
406 struct sockaddr_in *sin;
407 int scrub;
408{
409 register u_long i = ntohl(sin->sin_addr.s_addr);
410 struct sockaddr_in oldaddr;

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483 }
484 return (error);
485}
486
487
488/*
489 * Return 1 if the address might be a local broadcast address.
490 */
491int
486in_broadcast(in, ifp)
487 struct in_addr in;
488 struct ifnet *ifp;
489{
490 register struct ifaddr *ifa;
491 u_long t;
492
493 if (in.s_addr == INADDR_BROADCAST ||

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579 }
580 splx(s);
581 return (inm);
582}
583
584/*
585 * Delete a multicast address record.
586 */
492in_broadcast(in, ifp)
493 struct in_addr in;
494 struct ifnet *ifp;
495{
496 register struct ifaddr *ifa;
497 u_long t;
498
499 if (in.s_addr == INADDR_BROADCAST ||

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585 }
586 splx(s);
587 return (inm);
588}
589
590/*
591 * Delete a multicast address record.
592 */
587int
593void
588in_delmulti(inm)
589 register struct in_multi *inm;
590{
591 register struct in_multi **p;
592 struct ifreq ifr;
593 int s = splnet();
594
595 if (--inm->inm_refcount == 0) {

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595 register struct in_multi *inm;
596{
597 register struct in_multi **p;
598 struct ifreq ifr;
599 int s = splnet();
600
601 if (--inm->inm_refcount == 0) {

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