[mirror_frr.git] / pimd / pim_register.c

/*
 * PIM for Quagga
 * Copyright (C) 2015 Cumulus Networks, Inc.
 * Donald Sharp
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; see the file COPYING; if not, write to the
 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
 * MA 02110-1301 USA
 */

#include <zebra.h>

#include "log.h"
#include "if.h"
#include "thread.h"
#include "prefix.h"

#include "pimd.h"
#include "pim_mroute.h"
#include "pim_iface.h"
#include "pim_msg.h"
#include "pim_pim.h"
#include "pim_str.h"
#include "pim_rp.h"
#include "pim_register.h"
#include "pim_upstream.h"
#include "pim_br.h"
#include "pim_rpf.h"
#include "pim_oil.h"
#include "pim_zebra.h"
#include "pim_join.h"
#include "pim_util.h"

struct thread *send_test_packet_timer = NULL;

void
pim_register_stop_send (struct interface *ifp, struct prefix_sg *sg,
			struct in_addr src, struct in_addr originator)
{
  struct pim_interface *pinfo;
  unsigned char buffer[3000];
  unsigned int b1length = 0;
  unsigned int length;
  uint8_t *b1;
  struct prefix p;

  if (PIM_DEBUG_PIM_REG)
    {
      zlog_debug ("Sending Register stop for %s to %s on %s",
		  pim_str_sg_dump (sg), inet_ntoa(originator), ifp->name);
    }

  memset (buffer, 0, 3000);
  b1 = (uint8_t *)buffer + PIM_MSG_REGISTER_STOP_LEN;

  length = pim_encode_addr_group (b1, AFI_IP, 0, 0, sg->grp);
  b1length += length;
  b1 += length;

  p.family = AF_INET;
  p.u.prefix4 = sg->src;
  p.prefixlen = 32;
  length = pim_encode_addr_ucast (b1, &p);
  b1length += length;

  pim_msg_build_header (buffer, b1length + PIM_MSG_REGISTER_STOP_LEN, PIM_MSG_TYPE_REG_STOP);

  pinfo = (struct pim_interface *)ifp->info;
  if (!pinfo)
    {
      if (PIM_DEBUG_PIM_TRACE)
        zlog_debug ("%s: No pinfo!\n", __PRETTY_FUNCTION__);
      return;
    }
  if (pim_msg_send (pinfo->pim_sock_fd, src, originator,
		    buffer, b1length + PIM_MSG_REGISTER_STOP_LEN,
		    ifp->name))
    {
      if (PIM_DEBUG_PIM_TRACE)
	{
	  zlog_debug ("%s: could not send PIM register stop message on interface %s",
		      __PRETTY_FUNCTION__, ifp->name);
	}
    }
}

int
pim_register_stop_recv (uint8_t *buf, int buf_size)
{
  struct pim_upstream *upstream = NULL;
  struct prefix source;
  struct prefix group;
  struct prefix_sg sg;
  int l;

  l = pim_parse_addr_group (&group, buf, buf_size);
  buf += l;
  buf_size -= l;
  pim_parse_addr_ucast (&source, buf, buf_size);
  memset (&sg, 0, sizeof (struct prefix_sg));
  sg.src = source.u.prefix4;
  sg.grp = group.u.prefix4;

  if (PIM_DEBUG_PIM_REG)
    {
      zlog_debug ("Received Register stop for %s",
		  pim_str_sg_dump (&sg));
    }

  upstream = pim_upstream_find (&sg);
  if (!upstream)
    {
      return 0;
    }

  switch (upstream->join_state)
    {
    case PIM_UPSTREAM_NOTJOINED:
    case PIM_UPSTREAM_PRUNE:
      return 0;
      break;
    case PIM_UPSTREAM_JOINED:
      upstream->join_state = PIM_UPSTREAM_PRUNE;
      pim_channel_del_oif (upstream->channel_oil, pim_regiface, PIM_OIF_FLAG_PROTO_PIM);
      pim_upstream_start_register_stop_timer (upstream, 0);
    case PIM_UPSTREAM_JOIN_PENDING:
      upstream->join_state = PIM_UPSTREAM_PRUNE;
      pim_upstream_start_register_stop_timer (upstream, 0);
      return 0;
      break;
    }

  return 0;
}

void
pim_register_send (const uint8_t *buf, int buf_size, struct in_addr src, struct pim_rpf *rpg, int null_register)
{
  unsigned char buffer[3000];
  unsigned char *b1;
  struct pim_interface *pinfo;
  struct interface *ifp;

  if (PIM_DEBUG_PIM_REG)
    {
       char rp_str[100];
       strcpy (rp_str, inet_ntoa (rpg->rpf_addr));
       zlog_debug ("Sending %sRegister Packet to %s", null_register ? "NULL " : "", rp_str);
    }

  ifp = rpg->source_nexthop.interface;
  pinfo = (struct pim_interface *)ifp->info;
  if (!pinfo) {
    zlog_debug("%s: No pinfo!\n", __PRETTY_FUNCTION__);
    return;
  }

  memset(buffer, 0, 3000);
  b1 = buffer + PIM_MSG_HEADER_LEN;
  *b1 |= null_register << 6;
  b1 = buffer + PIM_MSG_REGISTER_LEN;

  memcpy(b1, (const unsigned char *)buf, buf_size);

  pim_msg_build_header(buffer, buf_size + PIM_MSG_REGISTER_LEN, PIM_MSG_TYPE_REGISTER);

  if (pim_msg_send(pinfo->pim_sock_fd,
		   src,
		   rpg->rpf_addr,
		   buffer,
		   buf_size + PIM_MSG_REGISTER_LEN,
		   ifp->name)) {
    if (PIM_DEBUG_PIM_TRACE) {
      zlog_debug("%s: could not send PIM register message on interface %s",
		 __PRETTY_FUNCTION__, ifp->name);
    }
    return;
  }
}

/*
 * 4.4.2 Receiving Register Messages at the RP
 *
 *   When an RP receives a Register message, the course of action is
 *  decided according to the following pseudocode:
 *
 *  packet_arrives_on_rp_tunnel( pkt ) {
 *      if( outer.dst is not one of my addresses ) {
 *          drop the packet silently.
 *          # Note: this may be a spoofing attempt
 *      }
 *      if( I_am_RP(G) AND outer.dst == RP(G) ) {
 *            sentRegisterStop = FALSE;
 *            if ( register.borderbit == TRUE ) {
 *                 if ( PMBR(S,G) == unknown ) {
 *                      PMBR(S,G) = outer.src
 *                 } else if ( outer.src != PMBR(S,G) ) {
 *                      send Register-Stop(S,G) to outer.src
 *                      drop the packet silently.
 *                 }
 *            }
 *            if ( SPTbit(S,G) OR
 *             ( SwitchToSptDesired(S,G) AND
 *               ( inherited_olist(S,G) == NULL ))) {
 *              send Register-Stop(S,G) to outer.src
 *              sentRegisterStop = TRUE;
 *            }
 *            if ( SPTbit(S,G) OR SwitchToSptDesired(S,G) ) {
 *                 if ( sentRegisterStop == TRUE ) {
 *                      set KeepaliveTimer(S,G) to RP_Keepalive_Period;
 *                 } else {
 *                      set KeepaliveTimer(S,G) to Keepalive_Period;
 *                 }
 *            }
 *            if( !SPTbit(S,G) AND ! pkt.NullRegisterBit ) {
 *                 decapsulate and forward the inner packet to
 *                 inherited_olist(S,G,rpt) # Note (+)
 *            }
 *      } else {
 *          send Register-Stop(S,G) to outer.src
 *          # Note (*)
 *      }
 *  }
 */
int
pim_register_recv (struct interface *ifp,
		   struct in_addr dest_addr,
		   struct in_addr src_addr,
		   uint8_t *tlv_buf, int tlv_buf_size)
{
  int sentRegisterStop = 0;
  struct ip *ip_hdr;
  struct prefix_sg sg;
  uint32_t *bits;

#define PIM_MSG_REGISTER_BIT_RESERVED_LEN 4
  ip_hdr = (struct ip *)(tlv_buf + PIM_MSG_REGISTER_BIT_RESERVED_LEN);

  if (!pim_rp_check_is_my_ip_address (ip_hdr->ip_dst, dest_addr)) {
    if (PIM_DEBUG_PIM_REG) {
      char dest[100];

      pim_inet4_dump ("<dst?>", dest_addr, dest, sizeof(dest));
      zlog_debug ("%s: Received Register message for %s that I do not own", __func__,
		  dest);
    }
    return 0;
  }

  if (PIM_DEBUG_PIM_REG)
    {
      char src_str[100];

      pim_inet4_dump ("<src?>", src_addr, src_str, sizeof (src_str));
      zlog_debug ("Received Register message from %s on %s", src_str, ifp->name);
    }

  /*
   * Please note this is not drawn to get the correct bit/data size
   *
   * The entirety of the REGISTER packet looks like this:
   * -------------------------------------------------------------
   * | Ver  | Type | Reserved     |       Checksum               |
   * |-----------------------------------------------------------|
   * |B|N|     Reserved 2                                        |
   * |-----------------------------------------------------------|
   * | Encap  |                IP HDR                            |
   * | Mcast  |                                                  |
   * | Packet |--------------------------------------------------|
   * |        |               Mcast Data                         |
   * |        |                                                  |
   * ...
   *
   * tlv_buf when received from the caller points at the B bit
   * We need to know the inner source and dest
   */
  bits = (uint32_t *)tlv_buf;

  /*
   * tlv_buf points to the start of the |B|N|... Reserved
   * Line above.  So we need to add 4 bytes to get to the
   * start of the actual Encapsulated data.
   */
  memset (&sg, 0, sizeof (struct prefix_sg));
  sg.src = ip_hdr->ip_src;
  sg.grp = ip_hdr->ip_dst;

  if (I_am_RP (sg.grp) && (dest_addr.s_addr == ((RP (sg.grp))->rpf_addr.s_addr))) {
    sentRegisterStop = 0;

    if (*bits & PIM_REGISTER_BORDER_BIT) {
      struct in_addr pimbr = pim_br_get_pmbr (&sg);
      if (PIM_DEBUG_PIM_PACKETS)
	zlog_debug("%s: Received Register message with Border bit set", __func__);

      if (pimbr.s_addr == pim_br_unknown.s_addr)
	pim_br_set_pmbr(&sg, src_addr);
      else if (src_addr.s_addr != pimbr.s_addr) {
	pim_register_stop_send (ifp, &sg, dest_addr, src_addr);
	if (PIM_DEBUG_PIM_PACKETS)
	  zlog_debug("%s: Sending register-Stop to %s and dropping mr. packet",
	    __func__, "Sender");
	/* Drop Packet Silently */
	return 1;
      }
    }

    struct pim_upstream *upstream = pim_upstream_find (&sg);
    /*
     * If we don't have a place to send ignore the packet
     */
    if (!upstream)
      {
	upstream = pim_upstream_add (&sg, ifp);
        if (!upstream)
          {
            zlog_warn ("Failure to crate upstream state");
            return 1;
          }
        upstream->upstream_register = src_addr;
	pim_rp_set_upstream_addr (&upstream->upstream_addr, sg.src, sg.grp);
	pim_nexthop_lookup (&upstream->rpf.source_nexthop,
			    upstream->upstream_addr);
	upstream->sg.src = sg.src;
	upstream->rpf.rpf_addr = upstream->rpf.source_nexthop.mrib_nexthop_addr;

	upstream->join_state = PIM_UPSTREAM_PRUNE;

      }

    if ((upstream->sptbit == PIM_UPSTREAM_SPTBIT_TRUE) ||
	((SwitchToSptDesired(&sg)) &&
	 pim_upstream_inherited_olist (upstream) == 0)) {
      //pim_scan_individual_oil (upstream->channel_oil);
      pim_register_stop_send (ifp, &sg, dest_addr, src_addr);
      sentRegisterStop = 1;
    }

    if ((upstream->sptbit == PIM_UPSTREAM_SPTBIT_TRUE) ||
	(SwitchToSptDesired(&sg))) {
      if (sentRegisterStop) {
	pim_upstream_keep_alive_timer_start (upstream, qpim_rp_keep_alive_time);
      } else {
	pim_upstream_keep_alive_timer_start (upstream, qpim_keep_alive_time);
      }
    }

    if (!(upstream->sptbit == PIM_UPSTREAM_SPTBIT_TRUE) &&
	!(*bits & PIM_REGISTER_NR_BIT))
      {
	//decapsulate and forward the iner packet to
	//inherited_olist(S,G,rpt)
	// This is taken care of by the kernel for us
      }
  } else {
    pim_register_stop_send (ifp, &sg, dest_addr, src_addr);
  }

  return 1;
}


static int
pim_register_send_test_packet (struct thread *t)
{
  uint8_t *packet;

  packet = THREAD_ARG(t);

  *packet = 4;

  return 1;
}

/*
 * pim_register_send_test_packet
 *
 * Send a test packet to the RP from source, in group and pps packets per second
 */
void
pim_register_send_test_packet_start (struct in_addr source,
				     struct in_addr group,
				     uint32_t pps)
{
  uint8_t *packet = NULL;

  THREAD_TIMER_MSEC_ON(master, send_test_packet_timer,
		       pim_register_send_test_packet, packet, 1000/pps);

  return;
}
Commit	Line	Data
01d68c9b DS	1	/*
	2	* PIM for Quagga
	3	* Copyright (C) 2015 Cumulus Networks, Inc.
	4	* Donald Sharp
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful, but
	12	* WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	* General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; see the file COPYING; if not, write to the
	18	* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
	19	* MA 02110-1301 USA
	20	*/
	21
	22	#include <zebra.h>
	23
	24	#include "log.h"
	25	#include "if.h"
	26	#include "thread.h"
13c2408c	27	#include "prefix.h"
01d68c9b DS	28
01d68c9b DS	29	#include "pimd.h"
998af219 DS	30	#include "pim_mroute.h"
	31	#include "pim_iface.h"
	32	#include "pim_msg.h"
	33	#include "pim_pim.h"
01d68c9b DS	34	#include "pim_str.h"
	35	#include "pim_rp.h"
	36	#include "pim_register.h"
80c0d168	37	#include "pim_upstream.h"
01d68c9b	38	#include "pim_br.h"
2ca35b3d DS	39	#include "pim_rpf.h"
	40	#include "pim_oil.h"
	41	#include "pim_zebra.h"
	42	#include "pim_join.h"
13c2408c	43	#include "pim_util.h"
01d68c9b DS	44
	45	struct thread *send_test_packet_timer = NULL;
	46
8e38a2cf	47	void
4ed0af70	48	pim_register_stop_send (struct interface ifp, struct prefix_sg sg,
4df01a4e	49	struct in_addr src, struct in_addr originator)
01d68c9b	50	{
13c2408c DS	51	struct pim_interface *pinfo;
	52	unsigned char buffer[3000];
	53	unsigned int b1length = 0;
	54	unsigned int length;
	55	uint8_t *b1;
	56	struct prefix p;
	57
9add3b88 DS	58	if (PIM_DEBUG_PIM_REG)
	59	{
	60	zlog_debug ("Sending Register stop for %s to %s on %s",
	61	pim_str_sg_dump (sg), inet_ntoa(originator), ifp->name);
	62	}
	63
13c2408c DS	64	memset (buffer, 0, 3000);
	65	b1 = (uint8_t *)buffer + PIM_MSG_REGISTER_STOP_LEN;
	66
4ed0af70	67	length = pim_encode_addr_group (b1, AFI_IP, 0, 0, sg->grp);
13c2408c DS	68	b1length += length;
	69	b1 += length;
	70
	71	p.family = AF_INET;
4ed0af70	72	p.u.prefix4 = sg->src;
13c2408c DS	73	p.prefixlen = 32;
	74	length = pim_encode_addr_ucast (b1, &p);
	75	b1length += length;
	76
	77	pim_msg_build_header (buffer, b1length + PIM_MSG_REGISTER_STOP_LEN, PIM_MSG_TYPE_REG_STOP);
	78
	79	pinfo = (struct pim_interface *)ifp->info;
	80	if (!pinfo)
	81	{
	82	if (PIM_DEBUG_PIM_TRACE)
	83	zlog_debug ("%s: No pinfo!\n", __PRETTY_FUNCTION__);
	84	return;
	85	}
4df01a4e	86	if (pim_msg_send (pinfo->pim_sock_fd, src, originator,
13c2408c DS	87	buffer, b1length + PIM_MSG_REGISTER_STOP_LEN,
	88	ifp->name))
	89	{
	90	if (PIM_DEBUG_PIM_TRACE)
	91	{
	92	zlog_debug ("%s: could not send PIM register stop message on interface %s",
	93	__PRETTY_FUNCTION__, ifp->name);
	94	}
	95	}
01d68c9b DS	96	}
01d68c9b DS	97
4dffc880	98	int
56638739	99	pim_register_stop_recv (uint8_t *buf, int buf_size)
4dffc880	100	{
56638739 DS	101	struct pim_upstream *upstream = NULL;
	102	struct prefix source;
	103	struct prefix group;
4ed0af70	104	struct prefix_sg sg;
56638739 DS	105	int l;
56638739 DS	106
56638739 DS	107	l = pim_parse_addr_group (&group, buf, buf_size);
	108	buf += l;
	109	buf_size -= l;
a878ba45	110	pim_parse_addr_ucast (&source, buf, buf_size);
4ed0af70 DS	111	memset (&sg, 0, sizeof (struct prefix_sg));
	112	sg.src = source.u.prefix4;
	113	sg.grp = group.u.prefix4;
9add3b88 DS	114
	115	if (PIM_DEBUG_PIM_REG)
	116	{
	117	zlog_debug ("Received Register stop for %s",
	118	pim_str_sg_dump (&sg));
	119	}
	120
5074a423	121	upstream = pim_upstream_find (&sg);
56638739 DS	122	if (!upstream)
	123	{
	124	return 0;
	125	}
	126
	127	switch (upstream->join_state)
	128	{
	129	case PIM_UPSTREAM_NOTJOINED:
	130	case PIM_UPSTREAM_PRUNE:
	131	return 0;
	132	break;
	133	case PIM_UPSTREAM_JOINED:
bb027ee8 DS	134	upstream->join_state = PIM_UPSTREAM_PRUNE;
	135	pim_channel_del_oif (upstream->channel_oil, pim_regiface, PIM_OIF_FLAG_PROTO_PIM);
	136	pim_upstream_start_register_stop_timer (upstream, 0);
56638739 DS	137	case PIM_UPSTREAM_JOIN_PENDING:
	138	upstream->join_state = PIM_UPSTREAM_PRUNE;
	139	pim_upstream_start_register_stop_timer (upstream, 0);
56638739 DS	140	return 0;
	141	break;
	142	}
	143
4dffc880 DS	144	return 0;
	145	}
	146
998af219	147	void
4df01a4e	148	pim_register_send (const uint8_t buf, int buf_size, struct in_addr src, struct pim_rpf rpg, int null_register)
998af219 DS	149	{
	150	unsigned char buffer[3000];
	151	unsigned char *b1;
	152	struct pim_interface *pinfo;
	153	struct interface *ifp;
998af219	154
9add3b88 DS	155	if (PIM_DEBUG_PIM_REG)
	156	{
	157	char rp_str[100];
	158	strcpy (rp_str, inet_ntoa (rpg->rpf_addr));
	159	zlog_debug ("Sending %sRegister Packet to %s", null_register ? "NULL " : "", rp_str);
	160	}
	161
998af219 DS	162	ifp = rpg->source_nexthop.interface;
	163	pinfo = (struct pim_interface *)ifp->info;
	164	if (!pinfo) {
	165	zlog_debug("%s: No pinfo!\n", __PRETTY_FUNCTION__);
	166	return;
	167	}
	168
	169	memset(buffer, 0, 3000);
b100a4f5	170	b1 = buffer + PIM_MSG_HEADER_LEN;
dc686f82	171	*b1 \|= null_register << 6;
998af219 DS	172	b1 = buffer + PIM_MSG_REGISTER_LEN;
998af219 DS	173
b100a4f5	174	memcpy(b1, (const unsigned char *)buf, buf_size);
998af219	175
b100a4f5	176	pim_msg_build_header(buffer, buf_size + PIM_MSG_REGISTER_LEN, PIM_MSG_TYPE_REGISTER);
998af219 DS	177
998af219 DS	178	if (pim_msg_send(pinfo->pim_sock_fd,
4df01a4e	179	src,
998af219 DS	180	rpg->rpf_addr,
998af219 DS	181	buffer,
b100a4f5	182	buf_size + PIM_MSG_REGISTER_LEN,
998af219 DS	183	ifp->name)) {
	184	if (PIM_DEBUG_PIM_TRACE) {
	185	zlog_debug("%s: could not send PIM register message on interface %s",
	186	__PRETTY_FUNCTION__, ifp->name);
	187	}
	188	return;
	189	}
	190	}
	191
01d68c9b DS	192	/*
	193	* 4.4.2 Receiving Register Messages at the RP
	194	*
	195	* When an RP receives a Register message, the course of action is
	196	* decided according to the following pseudocode:
	197	*
	198	* packet_arrives_on_rp_tunnel( pkt ) {
	199	* if( outer.dst is not one of my addresses ) {
	200	* drop the packet silently.
	201	* # Note: this may be a spoofing attempt
	202	* }
	203	* if( I_am_RP(G) AND outer.dst == RP(G) ) {
	204	* sentRegisterStop = FALSE;
	205	* if ( register.borderbit == TRUE ) {
	206	* if ( PMBR(S,G) == unknown ) {
	207	* PMBR(S,G) = outer.src
	208	* } else if ( outer.src != PMBR(S,G) ) {
	209	* send Register-Stop(S,G) to outer.src
	210	* drop the packet silently.
	211	* }
	212	* }
	213	* if ( SPTbit(S,G) OR
	214	* ( SwitchToSptDesired(S,G) AND
	215	* ( inherited_olist(S,G) == NULL ))) {
	216	* send Register-Stop(S,G) to outer.src
	217	* sentRegisterStop = TRUE;
	218	* }
	219	* if ( SPTbit(S,G) OR SwitchToSptDesired(S,G) ) {
	220	* if ( sentRegisterStop == TRUE ) {
	221	* set KeepaliveTimer(S,G) to RP_Keepalive_Period;
	222	* } else {
	223	* set KeepaliveTimer(S,G) to Keepalive_Period;
	224	* }
	225	* }
	226	* if( !SPTbit(S,G) AND ! pkt.NullRegisterBit ) {
	227	* decapsulate and forward the inner packet to
	228	* inherited_olist(S,G,rpt) # Note (+)
	229	* }
	230	* } else {
	231	* send Register-Stop(S,G) to outer.src
	232	* # Note (*)
	233	* }
	234	* }
	235	*/
	236	int
	237	pim_register_recv (struct interface *ifp,
	238	struct in_addr dest_addr,
	239	struct in_addr src_addr,
	240	uint8_t *tlv_buf, int tlv_buf_size)
	241	{
77e390e5 DS	242	int sentRegisterStop = 0;
77e390e5 DS	243	struct ip *ip_hdr;
4ed0af70	244	struct prefix_sg sg;
77e390e5	245	uint32_t *bits;
01d68c9b	246
75a26779 DS	247	#define PIM_MSG_REGISTER_BIT_RESERVED_LEN 4
	248	ip_hdr = (struct ip *)(tlv_buf + PIM_MSG_REGISTER_BIT_RESERVED_LEN);
	249
	250	if (!pim_rp_check_is_my_ip_address (ip_hdr->ip_dst, dest_addr)) {
d41b415c	251	if (PIM_DEBUG_PIM_REG) {
01d68c9b DS	252	char dest[100];
	253
	254	pim_inet4_dump ("<dst?>", dest_addr, dest, sizeof(dest));
	255	zlog_debug ("%s: Received Register message for %s that I do not own", __func__,
	256	dest);
	257	}
	258	return 0;
	259	}
	260
9add3b88 DS	261	if (PIM_DEBUG_PIM_REG)
	262	{
	263	char src_str[100];
	264
	265	pim_inet4_dump ("<src?>", src_addr, src_str, sizeof (src_str));
	266	zlog_debug ("Received Register message from %s on %s", src_str, ifp->name);
	267	}
	268
77e390e5 DS	269	/*
	270	* Please note this is not drawn to get the correct bit/data size
	271	*
	272	* The entirety of the REGISTER packet looks like this:
	273	* -------------------------------------------------------------
	274	* \| Ver \| Type \| Reserved \| Checksum \|
	275	* \|-----------------------------------------------------------\|
	276	* \|B\|N\| Reserved 2 \|
	277	* \|-----------------------------------------------------------\|
	278	* \| Encap \| IP HDR \|
	279	* \| Mcast \| \|
	280	* \| Packet \|--------------------------------------------------\|
	281	* \| \| Mcast Data \|
	282	* \| \| \|
	283	* ...
	284	*
	285	* tlv_buf when received from the caller points at the B bit
	286	* We need to know the inner source and dest
	287	*/
	288	bits = (uint32_t *)tlv_buf;
83d8ff00 DS	289
	290	/*
	291	* tlv_buf points to the start of the \|B\|N\|... Reserved
	292	* Line above. So we need to add 4 bytes to get to the
	293	* start of the actual Encapsulated data.
	294	*/
4ed0af70 DS	295	memset (&sg, 0, sizeof (struct prefix_sg));
	296	sg.src = ip_hdr->ip_src;
	297	sg.grp = ip_hdr->ip_dst;
77e390e5	298
4ed0af70	299	if (I_am_RP (sg.grp) && (dest_addr.s_addr == ((RP (sg.grp))->rpf_addr.s_addr))) {
77e390e5	300	sentRegisterStop = 0;
01d68c9b	301
9eda95bd	302	if (*bits & PIM_REGISTER_BORDER_BIT) {
65e1fcd7	303	struct in_addr pimbr = pim_br_get_pmbr (&sg);
01d68c9b DS	304	if (PIM_DEBUG_PIM_PACKETS)
	305	zlog_debug("%s: Received Register message with Border bit set", __func__);
	306
	307	if (pimbr.s_addr == pim_br_unknown.s_addr)
65e1fcd7	308	pim_br_set_pmbr(&sg, src_addr);
80c0d168	309	else if (src_addr.s_addr != pimbr.s_addr) {
4df01a4e	310	pim_register_stop_send (ifp, &sg, dest_addr, src_addr);
01d68c9b DS	311	if (PIM_DEBUG_PIM_PACKETS)
	312	zlog_debug("%s: Sending register-Stop to %s and dropping mr. packet",
	313	__func__, "Sender");
77e390e5 DS	314	/* Drop Packet Silently */
77e390e5 DS	315	return 1;
01d68c9b DS	316	}
01d68c9b DS	317	}
77e390e5	318
5074a423	319	struct pim_upstream *upstream = pim_upstream_find (&sg);
77e390e5 DS	320	/*
	321	* If we don't have a place to send ignore the packet
	322	*/
	323	if (!upstream)
9fd309db	324	{
5074a423	325	upstream = pim_upstream_add (&sg, ifp);
4e85d209 DS	326	if (!upstream)
	327	{
	328	zlog_warn ("Failure to crate upstream state");
	329	return 1;
	330	}
8e38a2cf	331	upstream->upstream_register = src_addr;
36d6bd7d	332	pim_rp_set_upstream_addr (&upstream->upstream_addr, sg.src, sg.grp);
216bb84f	333	pim_nexthop_lookup (&upstream->rpf.source_nexthop,
f24405b1	334	upstream->upstream_addr);
4ed0af70	335	upstream->sg.src = sg.src;
216bb84f DS	336	upstream->rpf.rpf_addr = upstream->rpf.source_nexthop.mrib_nexthop_addr;
216bb84f DS	337
8e38a2cf	338	upstream->join_state = PIM_UPSTREAM_PRUNE;
219e0013	339
9fd309db DS	340	}
9fd309db DS	341
77e390e5	342	if ((upstream->sptbit == PIM_UPSTREAM_SPTBIT_TRUE) \|\|
ad410c6c	343	((SwitchToSptDesired(&sg)) &&
4fdc8f36	344	pim_upstream_inherited_olist (upstream) == 0)) {
216bb84f	345	//pim_scan_individual_oil (upstream->channel_oil);
4df01a4e	346	pim_register_stop_send (ifp, &sg, dest_addr, src_addr);
77e390e5 DS	347	sentRegisterStop = 1;
	348	}
	349
	350	if ((upstream->sptbit == PIM_UPSTREAM_SPTBIT_TRUE) \|\|
ad410c6c	351	(SwitchToSptDesired(&sg))) {
80c0d168	352	if (sentRegisterStop) {
01408ede	353	pim_upstream_keep_alive_timer_start (upstream, qpim_rp_keep_alive_time);
77e390e5	354	} else {
4304f95c	355	pim_upstream_keep_alive_timer_start (upstream, qpim_keep_alive_time);
77e390e5 DS	356	}
	357	}
	358
	359	if (!(upstream->sptbit == PIM_UPSTREAM_SPTBIT_TRUE) &&
2ca35b3d DS	360	!(*bits & PIM_REGISTER_NR_BIT))
2ca35b3d DS	361	{
2ca35b3d DS	362	//decapsulate and forward the iner packet to
2ca35b3d DS	363	//inherited_olist(S,G,rpt)
0365f56b	364	// This is taken care of by the kernel for us
2ca35b3d	365	}
77e390e5	366	} else {
4df01a4e	367	pim_register_stop_send (ifp, &sg, dest_addr, src_addr);
77e390e5	368	}
01d68c9b DS	369
	370	return 1;
	371	}
	372
	373
	374	static int
	375	pim_register_send_test_packet (struct thread *t)
	376	{
	377	uint8_t *packet;
	378
	379	packet = THREAD_ARG(t);
	380
	381	*packet = 4;
	382
	383	return 1;
	384	}
	385
	386	/*
	387	* pim_register_send_test_packet
	388	*
	389	* Send a test packet to the RP from source, in group and pps packets per second
	390	*/
	391	void
	392	pim_register_send_test_packet_start (struct in_addr source,
	393	struct in_addr group,
	394	uint32_t pps)
	395	{
	396	uint8_t *packet = NULL;
	397
	398	THREAD_TIMER_MSEC_ON(master, send_test_packet_timer,
	399	pim_register_send_test_packet, packet, 1000/pps);
	400
	401	return;
	402	}