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Diffstat (limited to 'ipsend/in_var.h')
| -rw-r--r-- | ipsend/in_var.h | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/ipsend/in_var.h b/ipsend/in_var.h new file mode 100644 index 0000000..2ebd731 --- /dev/null +++ b/ipsend/in_var.h @@ -0,0 +1,177 @@ +/* @(#)in_var.h 1.3 88/08/19 SMI; from UCB 7.1 6/5/86 */ + +/* + * Copyright (c) 1985, 1986 Regents of the University of California. + * All rights reserved. The Berkeley software License Agreement + * specifies the terms and conditions for redistribution. + */ + +/* + * 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. + */ + +#ifndef _netinet_in_var_h +#define _netinet_in_var_h + +struct in_ifaddr { + struct ifaddr ia_ifa; /* protocol-independent info */ +#define ia_addr ia_ifa.ifa_addr +#define ia_broadaddr ia_ifa.ifa_broadaddr +#define ia_dstaddr ia_ifa.ifa_dstaddr +#define ia_ifp ia_ifa.ifa_ifp + 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 net + subnet */ + struct in_addr ia_netbroadcast; /* broadcast addr for (logical) net */ + int ia_flags; + struct in_ifaddr *ia_next; /* next in list of internet addresses */ + struct in_multi *ia_multiaddrs;/* list of multicast addresses */ +}; +/* + * Given a pointer to an in_ifaddr (ifaddr), + * return a pointer to the addr as a sockadd_in. + */ +#define IA_SIN(ia) ((struct sockaddr_in *)(&((struct in_ifaddr *)ia)->ia_addr)) +/* + * ia_flags + */ +#define IFA_ROUTE 0x01 /* routing entry installed */ + +#ifdef KERNEL +struct in_ifaddr *in_ifaddr; +struct in_ifaddr *in_iaonnetof(); +struct ifqueue ipintrq; /* ip packet input queue */ +#endif + +#ifdef KERNEL +/* + * 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_SIN(ia)->sin_addr.s_addr != (addr).s_addr; \ + ia = ia->ia_next); \ + (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); \ +} +#endif /* KERNEL */ + +/* + * Per-interface router version information is kept in this list. + * 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 *ifp; + int type; /* type of router which is querier on this interface */ + int time; /* # of slow timeouts since last old query */ + struct router_info *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 { + 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 */ + struct in_multi *inm_next; /* ptr to next multicast address */ + 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; \ + (inm) != NULL && (inm)->inm_addr.s_addr != (addr).s_addr; \ + (inm) = inm->inm_next); \ +} + +/* + * 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_next; \ + } \ + else while ((step).i_ia != NULL) { \ + (inm) = (step).i_ia->ia_multiaddrs; \ + (step).i_ia = (step).i_ia->ia_next; \ + if ((inm) != NULL) { \ + (step).i_inm = (inm)->inm_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(); +#endif /* KERNEL */ +#endif /*!_netinet_in_var_h*/ |
