diff options
Diffstat (limited to 'sys/netinet/in_var.h')
| -rw-r--r-- | sys/netinet/in_var.h | 117 |
1 files changed, 116 insertions, 1 deletions
diff --git a/sys/netinet/in_var.h b/sys/netinet/in_var.h index 9e03a296adb49..70d7a8185f011 100644 --- a/sys/netinet/in_var.h +++ b/sys/netinet/in_var.h @@ -31,7 +31,7 @@ * SUCH DAMAGE. * * from: @(#)in_var.h 7.6 (Berkeley) 6/28/90 - * $Id: in_var.h,v 1.6 1993/12/19 21:43:26 wollman Exp $ + * $Id: in_var.h,v 1.7 1994/05/17 22:31:08 jkh Exp $ */ #ifndef _NETINET_IN_VAR_H_ @@ -58,6 +58,7 @@ struct in_ifaddr { 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 */ + struct in_multi *ia_multiaddrs; /* list of multicast addresses */ }; struct in_aliasreq { @@ -144,5 +145,119 @@ extern int in_routemtu(struct route *); extern void in_mtureduce(struct in_addr, unsigned); extern void in_mtutimer(caddr_t, int); #endif /* MTUDISC */ + +/* + * 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) \ + continue; \ + (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 + +/* + * 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 */ +}; + +#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) \ + 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_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 __P((struct in_addr *, struct ifnet *)); +int in_delmulti __P((struct in_multi *)); #endif /* KERNEL */ #endif /* _NETINET_IN_VAR_H_ */ |