diff options
Diffstat (limited to 'usr.sbin/pim6sd/kern.c')
| -rw-r--r-- | usr.sbin/pim6sd/kern.c | 413 |
1 files changed, 413 insertions, 0 deletions
diff --git a/usr.sbin/pim6sd/kern.c b/usr.sbin/pim6sd/kern.c new file mode 100644 index 0000000..73f610d --- /dev/null +++ b/usr.sbin/pim6sd/kern.c @@ -0,0 +1,413 @@ +/* + * Copyright (c) 1998 by the University of Southern California. + * All rights reserved. + * + * Permission to use, copy, modify, and distribute this software and + * its documentation in source and binary forms for lawful + * purposes and without fee is hereby granted, provided + * that the above copyright notice appear in all copies and that both + * the copyright notice and this permission notice appear in supporting + * documentation, and that any documentation, advertising materials, + * and other materials related to such distribution and use acknowledge + * that the software was developed by the University of Southern + * California and/or Information Sciences Institute. + * The name of the University of Southern California may not + * be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THE UNIVERSITY OF SOUTHERN CALIFORNIA DOES NOT MAKE ANY REPRESENTATIONS + * ABOUT THE SUITABILITY OF THIS SOFTWARE FOR ANY PURPOSE. THIS SOFTWARE IS + * PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, + * INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, TITLE, AND + * NON-INFRINGEMENT. + * + * IN NO EVENT SHALL USC, OR ANY OTHER CONTRIBUTOR BE LIABLE FOR ANY + * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, WHETHER IN CONTRACT, + * TORT, OR OTHER FORM OF ACTION, ARISING OUT OF OR IN CONNECTION WITH, + * THE USE OR PERFORMANCE OF THIS SOFTWARE. + * + * Other copyrights might apply to parts of this software and are so + * noted when applicable. + * + * $FreeBSD$ + */ +/* + * Questions concerning this software should be directed to + * Mickael Hoerdt (hoerdt@clarinet.u-strasbg.fr) LSIIT Strasbourg. + * + */ +/* + * This program has been derived from pim6dd. + * The pim6dd program is covered by the license in the accompanying file + * named "LICENSE.pim6dd". + */ +/* + * This program has been derived from pimd. + * The pimd program is covered by the license in the accompanying file + * named "LICENSE.pimd". + * + */ + +#include <sys/time.h> +#include <sys/param.h> +#include <sys/types.h> +#include <sys/socket.h> +#include <sys/ioctl.h> +#include <errno.h> +#include <net/if.h> +#include <net/route.h> +#include <netinet/in.h> +#include <netinet6/ip6_mroute.h> +#if defined(__FreeBSD__) && __FreeBSD__ >= 3 +#include <net/if_var.h> +#endif +#include <netinet6/in6_var.h> +#include <syslog.h> +#include "pimd.h" +#include "inet6.h" +#include "vif.h" +#include "mrt.h" +#include "debug.h" + + +/* + * Open/init the multicast routing in the kernel and sets the MRT_ASSERT + * flag in the kernel. + * + */ + + +void +k_init_pim(int socket) +{ + int v = 1; + + if (setsockopt(socket, IPPROTO_IPV6, MRT6_INIT, (char *) &v, sizeof(int)) < 0) + log(LOG_ERR, errno, "cannot enable multicast routing in kernel"); + + if (setsockopt(socket, IPPROTO_IPV6, MRT6_PIM, (char *) &v, sizeof(int)) < 0) + log(LOG_ERR, errno, "Pim kernel initialization"); +} + +/* + * Stops the multicast routing in the kernel and resets the MRT_ASSERT flag + * in the kernel. + */ + +void +k_stop_pim(socket) + int socket; +{ + int v = 0; + + if (setsockopt(socket, IPPROTO_IPV6, MRT6_PIM, + (char *) &v, sizeof(int)) < 0) + log(LOG_ERR, errno, "Cannot reset PIM flag in kernel"); + + if (setsockopt(socket, IPPROTO_IPV6, MRT6_DONE, (char *) NULL, 0) < 0) + log(LOG_ERR, errno, "cannot disable multicast routing in kernel"); + +} + +/* + * Set the socket receiving buffer. `bufsize` is the preferred size, + * `minsize` is the smallest acceptable size. + */ + +void +k_set_rcvbuf(int socket, int bufsize, int minsize) +{ + int delta = bufsize / 2; + int iter = 0; + + /* + * Set the socket buffer. If we can't set it as large as we + * want, search around to try to find the highest acceptable + * value. The highest acceptable value being smaller than + * minsize is a fatal error. + */ + + + if (setsockopt(socket, SOL_SOCKET, SO_RCVBUF, (char *) &bufsize, sizeof(bufsize)) < 0) + { + bufsize -= delta; + while (1) + { + iter++; + if (delta > 1) + delta /= 2; + if (setsockopt(socket, SOL_SOCKET, SO_RCVBUF, (char *) &bufsize, sizeof(bufsize)) < 0) + bufsize -= delta; + else + { + if (delta < 1024) + break; + bufsize += delta; + } + } + if (bufsize < minsize) + log(LOG_ERR, 0, "OS-allowed buffer size %u < app min %u", + bufsize, minsize); + /*NOTREACHED*/ + + + } + IF_DEBUG(DEBUG_KERN) + log(LOG_DEBUG,0,"Buffer reception size for socket %d : %d in %d iterations",socket, bufsize, iter); +} + +/* + * Set the default Hop Limit for the multicast packets outgoing from this + * socket. + */ + +void +k_set_hlim(int socket, int h) +{ + int hlim = h; + + if (setsockopt(socket, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, (char *) &hlim, sizeof(hlim)) < 0) + log(LOG_ERR,errno,"k_set_hlim"); + +} + +/* + * Set/reset the IPV6_MULTICAST_LOOP. Set/reset is specified by "flag". + */ + + +void +k_set_loop(int socket, int flag) +{ + u_int loop; + + loop = flag; + if (setsockopt(socket, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, (char *) &loop, sizeof(loop)) < 0) + log(LOG_ERR,errno,"k_set_loop"); +} + +/* + * Set the IPV6_MULTICAST_IF option on local interface which has the + * specified index. + */ + + +void +k_set_if(int socket, u_int ifindex) +{ + if (setsockopt(socket, IPPROTO_IPV6, IPV6_MULTICAST_IF, + (char *) &ifindex, sizeof(ifindex)) < 0) + log(LOG_ERR, errno, "setsockopt IPV6_MULTICAST_IF for %s", + ifindex2str(ifindex)); + +} + +/* + * Join a multicast grp group on local interface ifa. + */ + +void +k_join(int socket, struct in6_addr * grp, u_int ifindex) +{ + struct ipv6_mreq mreq; + + mreq.ipv6mr_multiaddr = *grp; + mreq.ipv6mr_interface = ifindex; + + if (setsockopt(socket, IPPROTO_IPV6, IPV6_JOIN_GROUP, + (char *) &mreq, sizeof(mreq)) < 0) + syslog(LOG_WARNING, "Cannot join group %s on interface %s", + inet6_fmt(grp), ifindex2str(ifindex)); +} + +/* + * Leave a multicats grp group on local interface ifa. + */ + +void +k_leave(int socket, struct in6_addr * grp, u_int ifindex) +{ + struct ipv6_mreq mreq; + + mreq.ipv6mr_multiaddr = *grp; + mreq.ipv6mr_interface = ifindex; + + if (setsockopt(socket, IPPROTO_IPV6, IPV6_LEAVE_GROUP, + (char *) &mreq, sizeof(mreq)) < 0) + syslog(LOG_WARNING, "Cannot leave group %s on interface %s", + inet6_fmt(grp), ifindex2str(ifindex)); +} + +/* + * Add a virtual interface in the kernel. + */ + +void +k_add_vif(int socket, vifi_t vifi, struct uvif * v) +{ + struct mif6ctl mc; + + mc.mif6c_mifi = vifi; + mc.mif6c_flags = v->uv_flags; + + mc.mif6c_pifi = v->uv_ifindex; + + if ((v->uv_flags & MIFF_REGISTER)) + IF_DEBUG(DEBUG_PIM_REGISTER) + log(LOG_DEBUG,0,"register vifi : %d , register pifi : %d ", vifi, v->uv_ifindex); + + if (setsockopt(socket, IPPROTO_IPV6, MRT6_ADD_MIF, + (char *) &mc, sizeof(mc)) < 0) + log(LOG_ERR, errno, "setsockopt MRT6_ADD_MIF on mif %d", vifi); +} + +/* + * Delete a virtual interface in the kernel. + */ + +void +k_del_vif(int socket, vifi_t vifi) +{ + if (setsockopt(socket, IPPROTO_IPV6, MRT6_DEL_MIF, + (char *) &vifi, sizeof(vifi)) < 0) + log(LOG_ERR, errno, "setsockopt MRT6_DEL_MIF on mif %d", vifi); +} + +/* + * Delete all MFC entries for particular routing entry from the kernel. + */ + +int +k_del_mfc(int socket, struct sockaddr_in6 * source, struct sockaddr_in6 * group) +{ + struct mf6cctl mc; + + mc.mf6cc_origin = *source; + mc.mf6cc_mcastgrp = *group; + + pim6dstat.kern_del_cache++; + if (setsockopt(socket, IPPROTO_IPV6, MRT6_DEL_MFC, (char *) &mc, sizeof(mc)) < 0) + { + pim6dstat.kern_del_cache_fail++; + log(LOG_WARNING, errno, "setsockopt MRT6_DEL_MFC"); + return FALSE; + } + + syslog(LOG_DEBUG, "Deleted MFC entry : src %s ,grp %s", inet6_fmt(&source->sin6_addr), + inet6_fmt(&group->sin6_addr)); + + return TRUE; +} + +/* + * Install/modify a MFC entry in the kernel + */ + +int +k_chg_mfc(socket, source, group, iif, oifs, rp_addr) + int socket; + struct sockaddr_in6 *source; + struct sockaddr_in6 *group; + vifi_t iif; + if_set *oifs; + struct sockaddr_in6 *rp_addr; +{ + struct mf6cctl mc; + vifi_t vifi; + struct uvif *v; + + mc.mf6cc_origin = *source; + mc.mf6cc_mcastgrp = *group; + mc.mf6cc_parent = iif; + + + IF_ZERO(&mc.mf6cc_ifset); + + for (vifi = 0, v = uvifs; vifi < numvifs; vifi++, v++) + { + if (IF_ISSET(vifi, oifs)) + IF_SET(vifi, &mc.mf6cc_ifset); + else + IF_CLR(vifi, &mc.mf6cc_ifset); + } + +#ifdef PIM_REG_KERNEL_ENCAP + mc.mf6cc_rp_addr.s_addr = rp_addr; +#endif + + pim6dstat.kern_add_cache++; + if (setsockopt(socket, IPPROTO_IPV6, MRT6_ADD_MFC, (char *) &mc, + sizeof(mc)) < 0) + { + pim6dstat.kern_add_cache_fail++; + log(LOG_WARNING, errno, + "setsockopt MRT_ADD_MFC for source %s and group %s", + inet6_fmt(&source->sin6_addr), inet6_fmt(&group->sin6_addr)); + return (FALSE); + } + return (TRUE); +} + + + + +/* + * Get packet counters for particular interface + */ +/* + * XXX: TODO: currently not used, but keep just in case we need it later. + */ + +int +k_get_vif_count(vifi, retval) + vifi_t vifi; + struct vif_count *retval; +{ + struct sioc_mif_req6 mreq; + + mreq.mifi = vifi; + if (ioctl(udp_socket, SIOCGETMIFCNT_IN6, (char *) &mreq) < 0) + { + log(LOG_WARNING, errno, "SIOCGETMIFCNT_IN6 on vif %d", vifi); + retval->icount = retval->ocount = retval->ibytes = + retval->obytes = 0xffffffff; + return (1); + } + retval->icount = mreq.icount; + retval->ocount = mreq.ocount; + retval->ibytes = mreq.ibytes; + retval->obytes = mreq.obytes; + return (0); +} + + +/* + * Gets the number of packets, bytes, and number of packets arrived on wrong + * if in the kernel for particular (S,G) entry. + */ + +int +k_get_sg_cnt(socket, source, group, retval) + int socket; /* udp_socket */ + struct sockaddr_in6 *source; + struct sockaddr_in6 *group; + struct sg_count *retval; +{ + struct sioc_sg_req6 sgreq; + + sgreq.src = *source; + sgreq.grp = *group; + if (ioctl(socket, SIOCGETSGCNT_IN6, (char *) &sgreq) < 0) + { + pim6dstat.kern_sgcnt_fail++; + log(LOG_WARNING, errno, "SIOCGETSGCNT_IN6 on (%s %s)", + inet6_fmt(&source->sin6_addr), inet6_fmt(&group->sin6_addr)); + retval->pktcnt = retval->bytecnt = retval->wrong_if = ~0; /* XXX */ + return (1); + } + retval->pktcnt = sgreq.pktcnt; + retval->bytecnt = sgreq.bytecnt; + retval->wrong_if = sgreq.wrong_if; + return (0); +} |
