From 39e6e65a2c5a3312f365d59f23c469641e049c82 Mon Sep 17 00:00:00 2001 From: Joel Sherrill Date: Wed, 19 Aug 1998 21:32:28 +0000 Subject: Base files --- c/src/libnetworking/netinet/in_var.h | 235 +++++++++++++++++++++++++++++++++++ 1 file changed, 235 insertions(+) create mode 100644 c/src/libnetworking/netinet/in_var.h (limited to 'c/src/libnetworking/netinet/in_var.h') diff --git a/c/src/libnetworking/netinet/in_var.h b/c/src/libnetworking/netinet/in_var.h new file mode 100644 index 0000000000..e7a54d5e85 --- /dev/null +++ b/c/src/libnetworking/netinet/in_var.h @@ -0,0 +1,235 @@ +/* + * Copyright (c) 1985, 1986, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)in_var.h 8.2 (Berkeley) 1/9/95 + * $Id$ + */ + +#ifndef _NETINET_IN_VAR_H_ +#define _NETINET_IN_VAR_H_ + +#include + +/* + * Interface address, Internet version. One of these structures + * is allocated for each interface with an Internet address. + * The ifaddr structure contains the protocol-independent part + * of the structure and is assumed to be first. + */ +struct in_ifaddr { + struct ifaddr ia_ifa; /* protocol-independent info */ +#define ia_ifp ia_ifa.ifa_ifp +#define ia_flags ia_ifa.ifa_flags + /* ia_{,sub}net{,mask} in host order */ + u_long ia_net; /* network number of interface */ + u_long ia_netmask; /* mask of net part */ + u_long ia_subnet; /* subnet number, including net */ + u_long ia_subnetmask; /* mask of subnet part */ + struct in_addr ia_netbroadcast; /* to recognize net broadcasts */ + struct in_ifaddr *ia_next; /* next in list of internet addresses */ + struct sockaddr_in ia_addr; /* reserve space for interface name */ + struct sockaddr_in ia_dstaddr; /* reserve space for broadcast addr */ +#define ia_broadaddr ia_dstaddr + struct sockaddr_in ia_sockmask; /* reserve space for general netmask */ + LIST_HEAD(in_multihead, in_multi) ia_multiaddrs; + /* list of multicast addresses */ +}; + +struct in_aliasreq { + char ifra_name[IFNAMSIZ]; /* if name, e.g. "en0" */ + struct sockaddr_in ifra_addr; + struct sockaddr_in ifra_broadaddr; +#define ifra_dstaddr ifra_broadaddr + struct sockaddr_in ifra_mask; +}; +/* + * Given a pointer to an in_ifaddr (ifaddr), + * return a pointer to the addr as a sockaddr_in. + */ +#define IA_SIN(ia) (&(((struct in_ifaddr *)(ia))->ia_addr)) +#define IA_DSTSIN(ia) (&(((struct in_ifaddr *)(ia))->ia_dstaddr)) + +#define IN_LNAOF(in, ifa) \ + ((ntohl((in).s_addr) & ~((struct in_ifaddr *)(ifa)->ia_subnetmask)) + + +#ifdef KERNEL +extern struct in_ifaddr *in_ifaddr; +extern struct ifqueue ipintrq; /* ip packet input queue */ +extern struct in_addr zeroin_addr; +extern u_char inetctlerrmap[]; +extern int rtq_reallyold; /* XXX */ +extern int rtq_minreallyold; /* XXX */ +extern int rtq_toomany; /* XXX */ + +/* + * Macro for finding the interface (ifnet structure) corresponding to one + * of our IP addresses. + */ +#define INADDR_TO_IFP(addr, ifp) \ + /* struct in_addr addr; */ \ + /* struct ifnet *ifp; */ \ +{ \ + register struct in_ifaddr *ia; \ +\ + for (ia = in_ifaddr; \ + ia != NULL && ((ia->ia_ifp->if_flags & IFF_POINTOPOINT)? \ + IA_DSTSIN(ia):IA_SIN(ia))->sin_addr.s_addr != (addr).s_addr; \ + ia = ia->ia_next) \ + continue; \ + if (ia == NULL) \ + for (ia = in_ifaddr; \ + ia != NULL; \ + ia = ia->ia_next) \ + if (ia->ia_ifp->if_flags & IFF_POINTOPOINT && \ + IA_SIN(ia)->sin_addr.s_addr == (addr).s_addr) \ + break; \ + (ifp) = (ia == NULL) ? NULL : ia->ia_ifp; \ +} + +/* + * Macro for finding the internet address structure (in_ifaddr) corresponding + * to a given interface (ifnet structure). + */ +#define IFP_TO_IA(ifp, ia) \ + /* struct ifnet *ifp; */ \ + /* struct in_ifaddr *ia; */ \ +{ \ + for ((ia) = in_ifaddr; \ + (ia) != NULL && (ia)->ia_ifp != (ifp); \ + (ia) = (ia)->ia_next) \ + continue; \ +} +#endif + +/* + * This information should be part of the ifnet structure but we don't wish + * to change that - as it might break a number of things + */ + +struct router_info { + struct ifnet *rti_ifp; + int rti_type; /* type of router which is querier on this interface */ + int rti_time; /* # of slow timeouts since last old query */ + struct router_info *rti_next; +}; + +/* + * Internet multicast address structure. There is one of these for each IP + * multicast group to which this host belongs on a given network interface. + * They are kept in a linked list, rooted in the interface's in_ifaddr + * structure. + */ +struct in_multi { + LIST_ENTRY(in_multi) inm_entry; /* list glue */ + struct in_addr inm_addr; /* IP multicast address */ + struct ifnet *inm_ifp; /* back pointer to ifnet */ + struct in_ifaddr *inm_ia; /* back pointer to in_ifaddr */ + u_int inm_refcount; /* no. membership claims by sockets */ + u_int inm_timer; /* IGMP membership report timer */ + u_int inm_state; /* state of the membership */ + struct router_info *inm_rti; /* router info*/ +}; + +#ifdef KERNEL +/* + * Structure used by macros below to remember position when stepping through + * all of the in_multi records. + */ +struct in_multistep { + struct in_ifaddr *i_ia; + struct in_multi *i_inm; +}; + +/* + * Macro for looking up the in_multi record for a given IP multicast address + * on a given interface. If no matching record is found, "inm" returns NULL. + */ +#define IN_LOOKUP_MULTI(addr, ifp, inm) \ + /* struct in_addr addr; */ \ + /* struct ifnet *ifp; */ \ + /* struct in_multi *inm; */ \ +{ \ + register struct in_ifaddr *ia; \ +\ + IFP_TO_IA((ifp), ia); \ + if (ia == NULL) \ + (inm) = NULL; \ + else \ + for ((inm) = ia->ia_multiaddrs.lh_first; \ + (inm) != NULL && (inm)->inm_addr.s_addr != (addr).s_addr; \ + (inm) = inm->inm_entry.le_next) \ + continue; \ +} + +/* + * Macro to step through all of the in_multi records, one at a time. + * The current position is remembered in "step", which the caller must + * provide. IN_FIRST_MULTI(), below, must be called to initialize "step" + * and get the first record. Both macros return a NULL "inm" when there + * are no remaining records. + */ +#define IN_NEXT_MULTI(step, inm) \ + /* struct in_multistep step; */ \ + /* struct in_multi *inm; */ \ +{ \ + if (((inm) = (step).i_inm) != NULL) \ + (step).i_inm = (inm)->inm_entry.le_next; \ + else \ + while ((step).i_ia != NULL) { \ + (inm) = (step).i_ia->ia_multiaddrs.lh_first; \ + (step).i_ia = (step).i_ia->ia_next; \ + if ((inm) != NULL) { \ + (step).i_inm = (inm)->inm_entry.le_next; \ + break; \ + } \ + } \ +} + +#define IN_FIRST_MULTI(step, inm) \ + /* struct in_multistep step; */ \ + /* struct in_multi *inm; */ \ +{ \ + (step).i_ia = in_ifaddr; \ + (step).i_inm = NULL; \ + IN_NEXT_MULTI((step), (inm)); \ +} + +struct in_multi *in_addmulti __P((struct in_addr *, struct ifnet *)); +void in_delmulti __P((struct in_multi *)); +int in_control __P((struct socket *, u_long, caddr_t, struct ifnet *)); +void in_rtqdrain __P((void)); +void ip_input __P((struct mbuf *)); + +#endif /* KERNEL */ + +#endif /* _NETINET_IN_VAR_H_ */ -- cgit v1.2.3