[mirror_frr.git] / pimd / pim_zlookup.c

/*
 * PIM for Quagga
 * Copyright (C) 2008  Everton da Silva Marques
 *
 * 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 "zebra/rib.h"

#include "log.h"
#include "prefix.h"
#include "zclient.h"
#include "stream.h"
#include "network.h"
#include "thread.h"
#include "prefix.h"
#include "vty.h"

#include "pimd.h"
#include "pim_iface.h"
#include "pim_pim.h"
#include "pim_str.h"
#include "pim_oil.h"
#include "pim_zlookup.h"

static struct zclient *zlookup = NULL;

static void zclient_lookup_sched(struct zclient *zlookup, int delay);

/* Connect to zebra for nexthop lookup. */
static int zclient_lookup_connect(struct thread *t)
{
  struct zclient *zlookup;

  zlookup = THREAD_ARG(t);
  zlookup->t_connect = NULL;

  if (zlookup->sock >= 0) {
    return 0;
  }

  if (zclient_socket_connect(zlookup) < 0) {
    ++zlookup->fail;
    zlog_warn("%s: failure connecting zclient socket: failures=%d",
	      __PRETTY_FUNCTION__, zlookup->fail);
  }
  else {
    zlookup->fail = 0; /* reset counter on connection */
  }

  zassert(!zlookup->t_connect);
  if (zlookup->sock < 0) {
    /* Since last connect failed, retry within 10 secs */
    zclient_lookup_sched(zlookup, 10);
    return -1;
  }

  return 0;
}

/* Schedule connection with delay. */
static void zclient_lookup_sched(struct zclient *zlookup, int delay)
{
  zassert(!zlookup->t_connect);

  thread_add_timer(master, zclient_lookup_connect, zlookup, delay,
                   &zlookup->t_connect);

  zlog_notice("%s: zclient lookup connection scheduled for %d seconds",
	      __PRETTY_FUNCTION__, delay);
}

/* Schedule connection for now. */
static void zclient_lookup_sched_now(struct zclient *zlookup)
{
  zassert(!zlookup->t_connect);
  thread_add_event(master, zclient_lookup_connect, zlookup, 0,
                   &zlookup->t_connect);

  zlog_notice("%s: zclient lookup immediate connection scheduled",
	      __PRETTY_FUNCTION__);
}

/* Schedule reconnection, if needed. */
static void zclient_lookup_reconnect(struct zclient *zlookup)
{
  if (zlookup->t_connect) {
    return;
  }

  zclient_lookup_sched_now(zlookup);
}

static void zclient_lookup_failed(struct zclient *zlookup)
{
  if (zlookup->sock >= 0) {
    if (close(zlookup->sock)) {
      zlog_warn("%s: closing fd=%d: errno=%d %s", __func__, zlookup->sock,
		errno, safe_strerror(errno));
    }
    zlookup->sock = -1;
  }

  zclient_lookup_reconnect(zlookup);
}

void
zclient_lookup_free (void)
{
  zclient_free (zlookup);
  zlookup = NULL;
}

void
zclient_lookup_new (void)
{
  zlookup = zclient_new (master);
  if (!zlookup) {
    zlog_err("%s: zclient_new() failure",
	     __PRETTY_FUNCTION__);
    return;
  }

  zlookup->sock = -1;
  zlookup->t_connect = NULL;

  zclient_lookup_sched_now(zlookup);

  zlog_notice("%s: zclient lookup socket initialized",
	      __PRETTY_FUNCTION__);

}

static int zclient_read_nexthop(struct zclient *zlookup,
				struct pim_zlookup_nexthop nexthop_tab[],
				const int tab_size,
				struct in_addr addr)
{
  int num_ifindex = 0;
  struct stream *s;
  const uint16_t MIN_LEN = 10; /* getipv4=4 getc=1 getl=4 getc=1 */
  uint16_t length;
  u_char marker;
  u_char version;
  vrf_id_t vrf_id;
  uint16_t command = 0;
  struct in_addr raddr;
  uint8_t distance;
  uint32_t metric;
  int nexthop_num;
  int i, err;

  if (PIM_DEBUG_PIM_TRACE_DETAIL) {
    char addr_str[INET_ADDRSTRLEN];
    pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str));
    zlog_debug("%s: addr=%s", 
	       __PRETTY_FUNCTION__,
	       addr_str);
  }

  s = zlookup->ibuf;

  while (command != ZEBRA_IPV4_NEXTHOP_LOOKUP_MRIB)
    {
      stream_reset(s);
      err = zclient_read_header (s, zlookup->sock, &length, &marker, &version,
				 &vrf_id, &command);
      if (err < 0) {
	zlog_err("%s %s: zclient_read_header() failed",
		 __FILE__, __PRETTY_FUNCTION__);
	zclient_lookup_failed(zlookup);
	return -1;
      }

      if (length < MIN_LEN) {
	zlog_err("%s %s: failure reading zclient lookup socket: len=%d < MIN_LEN=%d",
		 __FILE__, __PRETTY_FUNCTION__, length, MIN_LEN);
	zclient_lookup_failed(zlookup);
	return -2;
      }
    }

  raddr.s_addr = stream_get_ipv4(s);

  if (raddr.s_addr != addr.s_addr) {
    char addr_str[INET_ADDRSTRLEN];
    char raddr_str[INET_ADDRSTRLEN];
    pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str));
    pim_inet4_dump("<raddr?>", raddr, raddr_str, sizeof(raddr_str));
    zlog_warn("%s: address mismatch: addr=%s raddr=%s", 
	       __PRETTY_FUNCTION__,
	       addr_str, raddr_str);
    /* warning only */
  }

  distance = stream_getc(s);
  metric = stream_getl(s);
  nexthop_num = stream_getc(s);

  if (nexthop_num < 1) {
    zlog_err("%s: socket %d bad nexthop_num=%d",
            __func__, zlookup->sock, nexthop_num);
    return -6;
  }

  for (i = 0; i < nexthop_num; ++i) {
    enum nexthop_types_t nexthop_type;
    struct pim_neighbor *nbr;
    struct prefix p;

    nexthop_type = stream_getc(s);
    if (num_ifindex >= tab_size) {
      char addr_str[INET_ADDRSTRLEN];
      pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str));
      zlog_warn("%s %s: found too many nexthop ifindexes (%d > %d) for address %s",
		__FILE__, __PRETTY_FUNCTION__,
		(num_ifindex + 1), tab_size, addr_str);
      return num_ifindex;
    }
    switch (nexthop_type) {
    case NEXTHOP_TYPE_IFINDEX:
    case NEXTHOP_TYPE_IPV4_IFINDEX:
    case NEXTHOP_TYPE_IPV4:
      nexthop_tab[num_ifindex].nexthop_addr.family = AF_INET;
      if (nexthop_type == NEXTHOP_TYPE_IPV4_IFINDEX ||
	  nexthop_type == NEXTHOP_TYPE_IPV4) {
	nexthop_tab[num_ifindex].nexthop_addr.u.prefix4.s_addr = stream_get_ipv4(s);
      }
      else {
	nexthop_tab[num_ifindex].nexthop_addr.u.prefix4.s_addr = PIM_NET_INADDR_ANY;
      }
      nexthop_tab[num_ifindex].ifindex           = stream_getl(s);
      nexthop_tab[num_ifindex].protocol_distance = distance;
      nexthop_tab[num_ifindex].route_metric      = metric;
      ++num_ifindex;
      break;
    case NEXTHOP_TYPE_IPV6_IFINDEX:
      nexthop_tab[num_ifindex].nexthop_addr.family = AF_INET6;
      stream_get (&nexthop_tab[num_ifindex].nexthop_addr.u.prefix6,
		  s,
		  sizeof(struct in6_addr));
      nexthop_tab[num_ifindex].ifindex = stream_getl (s);

      p.family = AF_INET6;
      p.prefixlen = IPV6_MAX_PREFIXLEN;
      memcpy (&p.u.prefix6,
	      &nexthop_tab[num_ifindex].nexthop_addr.u.prefix6,
	      sizeof(struct in6_addr));

      /*
       * If we are sending v6 secondary assume we receive v6 secondary
       */
      if (pimg->send_v6_secondary)
        nbr = pim_neighbor_find_by_secondary(if_lookup_by_index (nexthop_tab[num_ifindex].ifindex, VRF_DEFAULT), &p);
      else
        nbr = pim_neighbor_find_if (if_lookup_by_index (nexthop_tab[num_ifindex].ifindex, VRF_DEFAULT));
      if (nbr)
        {
          nexthop_tab[num_ifindex].nexthop_addr.family = AF_INET;
          nexthop_tab[num_ifindex].nexthop_addr.u.prefix4 = nbr->source_addr;
        }
        ++num_ifindex;
      break;
    default:
      /* do nothing */
      {
	char addr_str[INET_ADDRSTRLEN];
	pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str));
	zlog_warn("%s %s: found non-ifindex nexthop type=%d for address %s",
		 __FILE__, __PRETTY_FUNCTION__,
		  nexthop_type, addr_str);
      }
      break;
    }
  }

  return num_ifindex;
}

static int
zclient_lookup_nexthop_once (struct pim_zlookup_nexthop nexthop_tab[],
			     const int tab_size,
			     struct in_addr addr)
{
  struct stream *s;
  int ret;

  if (PIM_DEBUG_PIM_TRACE_DETAIL) {
    char addr_str[INET_ADDRSTRLEN];
    pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str));
    zlog_debug("%s: addr=%s", 
	       __PRETTY_FUNCTION__,
	       addr_str);
  }

  /* Check socket. */
  if (zlookup->sock < 0) {
    zlog_err("%s %s: zclient lookup socket is not connected",
	     __FILE__, __PRETTY_FUNCTION__);
    zclient_lookup_failed(zlookup);
    return -1;
  }
  
  s = zlookup->obuf;
  stream_reset(s);
  zclient_create_header(s, ZEBRA_IPV4_NEXTHOP_LOOKUP_MRIB, VRF_DEFAULT);
  stream_put_in_addr(s, &addr);
  stream_putw_at(s, 0, stream_get_endp(s));
  
  ret = writen(zlookup->sock, s->data, stream_get_endp(s));
  if (ret < 0) {
    zlog_err("%s %s: writen() failure: %d writing to zclient lookup socket",
	     __FILE__, __PRETTY_FUNCTION__, errno);
    zclient_lookup_failed(zlookup);
    return -2;
  }
  if (ret == 0) {
    zlog_err("%s %s: connection closed on zclient lookup socket",
	     __FILE__, __PRETTY_FUNCTION__);
    zclient_lookup_failed(zlookup);
    return -3;
  }
  
  return zclient_read_nexthop(zlookup, nexthop_tab,
			      tab_size, addr);
}

int
zclient_lookup_nexthop (struct pim_zlookup_nexthop nexthop_tab[],
			const int tab_size,
			struct in_addr addr,
			int max_lookup)
{
  int lookup;
  uint32_t route_metric = 0xFFFFFFFF;
  uint8_t  protocol_distance = 0xFF;

  qpim_nexthop_lookups++;

  for (lookup = 0; lookup < max_lookup; ++lookup) {
    int num_ifindex;
    int first_ifindex;
    struct prefix nexthop_addr;

    num_ifindex = zclient_lookup_nexthop_once(nexthop_tab,
					      tab_size, addr);
    if (num_ifindex < 1) {
      if (PIM_DEBUG_ZEBRA) {
	char addr_str[INET_ADDRSTRLEN];
	pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str));
	zlog_debug("%s %s: lookup=%d/%d: could not find nexthop ifindex for address %s",
		   __FILE__, __PRETTY_FUNCTION__,
		   lookup, max_lookup, addr_str);
      }
      return -1;
    }

    if (lookup < 1) {
      /* this is the non-recursive lookup - save original metric/distance */
      route_metric = nexthop_tab[0].route_metric;
      protocol_distance = nexthop_tab[0].protocol_distance;
    }
    
    /*
     * FIXME: Non-recursive nexthop ensured only for first ifindex.
     * However, recursive route lookup should really be fixed in zebra daemon.
     * See also TODO T24.
     *
     * So Zebra for NEXTHOP_TYPE_IPV4 returns the ifindex now since
     * it was being stored.  This Doesn't solve all cases of
     * recursive lookup but for the most common types it does.
     */
    first_ifindex = nexthop_tab[0].ifindex;
    nexthop_addr = nexthop_tab[0].nexthop_addr;
    if (first_ifindex > 0) {
      /* found: first ifindex is non-recursive nexthop */

      if (lookup > 0) {
	/* Report non-recursive success after first lookup */
	if (PIM_DEBUG_ZEBRA) {
	  char addr_str[INET_ADDRSTRLEN];
	  pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str));
	  zlog_debug("%s %s: lookup=%d/%d: found non-recursive ifindex=%d for address %s dist=%d met=%d",
		     __FILE__, __PRETTY_FUNCTION__,
		     lookup, max_lookup, first_ifindex, addr_str,
		     nexthop_tab[0].protocol_distance,
		     nexthop_tab[0].route_metric);
	}

	/* use last address as nexthop address */
	nexthop_tab[0].nexthop_addr.u.prefix4 = addr;

	/* report original route metric/distance */
	nexthop_tab[0].route_metric = route_metric;
	nexthop_tab[0].protocol_distance = protocol_distance;
      }

      return num_ifindex;
    }

    if (PIM_DEBUG_ZEBRA) {
      char addr_str[INET_ADDRSTRLEN];
      char nexthop_str[PREFIX_STRLEN];
      pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str));
      pim_addr_dump("<nexthop?>", &nexthop_addr, nexthop_str, sizeof(nexthop_str));
      zlog_debug("%s %s: lookup=%d/%d: zebra returned recursive nexthop %s for address %s dist=%d met=%d",
		__FILE__, __PRETTY_FUNCTION__,
		lookup, max_lookup, nexthop_str, addr_str,
		nexthop_tab[0].protocol_distance,
		nexthop_tab[0].route_metric);
    }

    addr = nexthop_addr.u.prefix4; /* use nexthop addr for recursive lookup */

  } /* for (max_lookup) */

  if (PIM_DEBUG_ZEBRA) {
    char addr_str[INET_ADDRSTRLEN];
    pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str));
    zlog_warn("%s %s: lookup=%d/%d: failure searching recursive nexthop ifindex for address %s",
	      __FILE__, __PRETTY_FUNCTION__,
	      lookup, max_lookup, addr_str);
  }

  return -2;
}

void
pim_zlookup_show_ip_multicast (struct vty *vty)
{
  vty_out(vty, "Zclient lookup socket: ");
  if (zlookup) {
    vty_out(vty, "%d failures=%d%s", zlookup->sock,
            zlookup->fail, VTY_NEWLINE);
  }
  else {
    vty_out(vty, "<null zclient>%s", VTY_NEWLINE);
  }
}

int
pim_zlookup_sg_statistics (struct channel_oil *c_oil)
{
  struct stream *s = zlookup->obuf;
  uint16_t command = 0;
  unsigned long long lastused;
  struct prefix_sg sg;
  int count = 0;
  int ret;
  struct interface *ifp = pim_if_find_by_vif_index (c_oil->oil.mfcc_parent);

  if (PIM_DEBUG_ZEBRA)
    {
      struct prefix_sg more;

      more.src = c_oil->oil.mfcc_origin;
      more.grp = c_oil->oil.mfcc_mcastgrp;
      zlog_debug ("Sending Request for New Channel Oil Information(%s) VIIF %d",
            pim_str_sg_dump (&more), c_oil->oil.mfcc_parent);
    }

  if (!ifp)
    return -1;

  stream_reset (s);
  zclient_create_header (s, ZEBRA_IPMR_ROUTE_STATS, VRF_DEFAULT);
  stream_put_in_addr (s, &c_oil->oil.mfcc_origin);
  stream_put_in_addr (s, &c_oil->oil.mfcc_mcastgrp);
  stream_putl (s,  ifp->ifindex);
  stream_putw_at(s, 0, stream_get_endp(s));

  count = stream_get_endp (s);
  ret = writen (zlookup->sock, s->data, count);
  if (ret <= 0)
    {
      zlog_err("%s %s: writen() failure: %d writing to zclient lookup socket",
               __FILE__, __PRETTY_FUNCTION__, errno);
      return -1;
    }

  s = zlookup->ibuf;

  while (command != ZEBRA_IPMR_ROUTE_STATS)
    {
      int err;
      uint16_t length = 0;
      vrf_id_t vrf_id;
      u_char marker;
      u_char version;

      stream_reset (s);
      err = zclient_read_header (s, zlookup->sock, &length, &marker, &version,
				 &vrf_id, &command);
      if (err < 0)
        {
          zlog_err ("%s %s: zclient_read_header() failed",
                 __FILE__, __PRETTY_FUNCTION__);
        zclient_lookup_failed(zlookup);
        return -1;
        }
    }

  sg.src.s_addr = stream_get_ipv4 (s);
  sg.grp.s_addr = stream_get_ipv4 (s);
  if (sg.src.s_addr != c_oil->oil.mfcc_origin.s_addr ||
      sg.grp.s_addr != c_oil->oil.mfcc_mcastgrp.s_addr)
    {
       zlog_err ("%s: Received wrong %s information",
		 __PRETTY_FUNCTION__, pim_str_sg_dump (&sg));
       zclient_lookup_failed (zlookup);
       return -3;
    }

  stream_get (&lastused, s, sizeof (lastused));
  ret = stream_getl (s);

  if (PIM_DEBUG_ZEBRA)
    zlog_debug ("Received %lld for %s success: %d", lastused, pim_str_sg_dump (&sg), ret);

  c_oil->cc.lastused = lastused;

  return 0;

}
Commit	Line	Data
12e41d03	1	/*
896014f4 DL	2	* PIM for Quagga
	3	* Copyright (C) 2008 Everton da Silva Marques
	4	*
	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License as published by
	7	* the Free Software Foundation; either version 2 of the License, or
	8	* (at your option) any later version.
	9	*
	10	* This program is distributed in the hope that it will be useful, but
	11	* WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	13	* General Public License for more details.
	14	*
	15	* You should have received a copy of the GNU General Public License along
	16	* with this program; see the file COPYING; if not, write to the Free Software
	17	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	18	*/
12e41d03 DL	19
	20	#include <zebra.h>
	21	#include "zebra/rib.h"
	22
	23	#include "log.h"
	24	#include "prefix.h"
	25	#include "zclient.h"
	26	#include "stream.h"
	27	#include "network.h"
	28	#include "thread.h"
e3be0432	29	#include "prefix.h"
05b0d0d0	30	#include "vty.h"
12e41d03 DL	31
12e41d03 DL	32	#include "pimd.h"
e3be0432	33	#include "pim_iface.h"
12e41d03 DL	34	#include "pim_pim.h"
12e41d03 DL	35	#include "pim_str.h"
e3be0432	36	#include "pim_oil.h"
12e41d03 DL	37	#include "pim_zlookup.h"
12e41d03 DL	38
05b0d0d0 DS	39	static struct zclient *zlookup = NULL;
05b0d0d0 DS	40
12e41d03 DL	41	static void zclient_lookup_sched(struct zclient *zlookup, int delay);
	42
	43	/* Connect to zebra for nexthop lookup. */
	44	static int zclient_lookup_connect(struct thread *t)
	45	{
	46	struct zclient *zlookup;
	47
	48	zlookup = THREAD_ARG(t);
	49	zlookup->t_connect = NULL;
	50
	51	if (zlookup->sock >= 0) {
	52	return 0;
	53	}
	54
	55	if (zclient_socket_connect(zlookup) < 0) {
	56	++zlookup->fail;
	57	zlog_warn("%s: failure connecting zclient socket: failures=%d",
	58	__PRETTY_FUNCTION__, zlookup->fail);
	59	}
	60	else {
	61	zlookup->fail = 0; /* reset counter on connection */
	62	}
	63
	64	zassert(!zlookup->t_connect);
	65	if (zlookup->sock < 0) {
	66	/* Since last connect failed, retry within 10 secs */
	67	zclient_lookup_sched(zlookup, 10);
	68	return -1;
	69	}
	70
	71	return 0;
	72	}
	73
	74	/* Schedule connection with delay. */
	75	static void zclient_lookup_sched(struct zclient *zlookup, int delay)
	76	{
	77	zassert(!zlookup->t_connect);
	78
ffa2c898 QY	79	thread_add_timer(master, zclient_lookup_connect, zlookup, delay,
ffa2c898 QY	80	&zlookup->t_connect);
12e41d03 DL	81
	82	zlog_notice("%s: zclient lookup connection scheduled for %d seconds",
	83	__PRETTY_FUNCTION__, delay);
	84	}
	85
	86	/* Schedule connection for now. */
	87	static void zclient_lookup_sched_now(struct zclient *zlookup)
	88	{
	89	zassert(!zlookup->t_connect);
66e78ae6 QY	90	thread_add_event(master, zclient_lookup_connect, zlookup, 0,
66e78ae6 QY	91	&zlookup->t_connect);
12e41d03 DL	92
	93	zlog_notice("%s: zclient lookup immediate connection scheduled",
	94	__PRETTY_FUNCTION__);
	95	}
	96
	97	/* Schedule reconnection, if needed. */
	98	static void zclient_lookup_reconnect(struct zclient *zlookup)
	99	{
	100	if (zlookup->t_connect) {
	101	return;
	102	}
	103
	104	zclient_lookup_sched_now(zlookup);
	105	}
	106
	107	static void zclient_lookup_failed(struct zclient *zlookup)
	108	{
	109	if (zlookup->sock >= 0) {
	110	if (close(zlookup->sock)) {
	111	zlog_warn("%s: closing fd=%d: errno=%d %s", __func__, zlookup->sock,
	112	errno, safe_strerror(errno));
	113	}
	114	zlookup->sock = -1;
	115	}
	116
	117	zclient_lookup_reconnect(zlookup);
	118	}
	119
0b6817c5 DS	120	void
	121	zclient_lookup_free (void)
	122	{
	123	zclient_free (zlookup);
	124	zlookup = NULL;
	125	}
	126
05b0d0d0 DS	127	void
05b0d0d0 DS	128	zclient_lookup_new (void)
12e41d03	129	{
469351b3	130	zlookup = zclient_new (master);
12e41d03 DL	131	if (!zlookup) {
	132	zlog_err("%s: zclient_new() failure",
	133	__PRETTY_FUNCTION__);
05b0d0d0	134	return;
12e41d03 DL	135	}
	136
	137	zlookup->sock = -1;
0b6817c5	138	zlookup->t_connect = NULL;
12e41d03 DL	139
	140	zclient_lookup_sched_now(zlookup);
	141
	142	zlog_notice("%s: zclient lookup socket initialized",
	143	__PRETTY_FUNCTION__);
	144
12e41d03 DL	145	}
	146
	147	static int zclient_read_nexthop(struct zclient *zlookup,
	148	struct pim_zlookup_nexthop nexthop_tab[],
	149	const int tab_size,
	150	struct in_addr addr)
	151	{
	152	int num_ifindex = 0;
	153	struct stream *s;
55119089 ND	154	const uint16_t MIN_LEN = 10; /* getipv4=4 getc=1 getl=4 getc=1 */
55119089 ND	155	uint16_t length;
12e41d03 DL	156	u_char marker;
12e41d03 DL	157	u_char version;
e7a2870b	158	vrf_id_t vrf_id;
78d3e257	159	uint16_t command = 0;
12e41d03 DL	160	struct in_addr raddr;
	161	uint8_t distance;
	162	uint32_t metric;
	163	int nexthop_num;
55119089	164	int i, err;
12e41d03	165
802b226c	166	if (PIM_DEBUG_PIM_TRACE_DETAIL) {
eaa54bdb	167	char addr_str[INET_ADDRSTRLEN];
12e41d03 DL	168	pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str));
	169	zlog_debug("%s: addr=%s",
	170	__PRETTY_FUNCTION__,
	171	addr_str);
	172	}
	173
	174	s = zlookup->ibuf;
12e41d03	175
78d3e257 DS	176	while (command != ZEBRA_IPV4_NEXTHOP_LOOKUP_MRIB)
	177	{
	178	stream_reset(s);
	179	err = zclient_read_header (s, zlookup->sock, &length, &marker, &version,
	180	&vrf_id, &command);
	181	if (err < 0) {
	182	zlog_err("%s %s: zclient_read_header() failed",
	183	__FILE__, __PRETTY_FUNCTION__);
	184	zclient_lookup_failed(zlookup);
	185	return -1;
	186	}
	187
	188	if (length < MIN_LEN) {
	189	zlog_err("%s %s: failure reading zclient lookup socket: len=%d < MIN_LEN=%d",
	190	__FILE__, __PRETTY_FUNCTION__, length, MIN_LEN);
	191	zclient_lookup_failed(zlookup);
	192	return -2;
	193	}
78d3e257	194	}
12e41d03 DL	195
	196	raddr.s_addr = stream_get_ipv4(s);
	197
	198	if (raddr.s_addr != addr.s_addr) {
eaa54bdb DW	199	char addr_str[INET_ADDRSTRLEN];
eaa54bdb DW	200	char raddr_str[INET_ADDRSTRLEN];
12e41d03 DL	201	pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str));
	202	pim_inet4_dump("<raddr?>", raddr, raddr_str, sizeof(raddr_str));
	203	zlog_warn("%s: address mismatch: addr=%s raddr=%s",
	204	__PRETTY_FUNCTION__,
	205	addr_str, raddr_str);
	206	/* warning only */
	207	}
	208
	209	distance = stream_getc(s);
	210	metric = stream_getl(s);
	211	nexthop_num = stream_getc(s);
	212
	213	if (nexthop_num < 1) {
	214	zlog_err("%s: socket %d bad nexthop_num=%d",
	215	__func__, zlookup->sock, nexthop_num);
	216	return -6;
	217	}
	218
12e41d03 DL	219	for (i = 0; i < nexthop_num; ++i) {
12e41d03 DL	220	enum nexthop_types_t nexthop_type;
12c7b75b	221	struct pim_neighbor *nbr;
eeff6d3f	222	struct prefix p;
12e41d03	223
12e41d03	224	nexthop_type = stream_getc(s);
84a35fdf	225	if (num_ifindex >= tab_size) {
eaa54bdb	226	char addr_str[INET_ADDRSTRLEN];
84a35fdf DS	227	pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str));
	228	zlog_warn("%s %s: found too many nexthop ifindexes (%d > %d) for address %s",
	229	__FILE__, __PRETTY_FUNCTION__,
	230	(num_ifindex + 1), tab_size, addr_str);
	231	return num_ifindex;
	232	}
12e41d03	233	switch (nexthop_type) {
5b30316e DS	234	case NEXTHOP_TYPE_IFINDEX:
5b30316e DS	235	case NEXTHOP_TYPE_IPV4_IFINDEX:
d4a2bc11	236	case NEXTHOP_TYPE_IPV4:
ba634917	237	nexthop_tab[num_ifindex].nexthop_addr.family = AF_INET;
d4a2bc11 DS	238	if (nexthop_type == NEXTHOP_TYPE_IPV4_IFINDEX \|\|
d4a2bc11 DS	239	nexthop_type == NEXTHOP_TYPE_IPV4) {
ba634917	240	nexthop_tab[num_ifindex].nexthop_addr.u.prefix4.s_addr = stream_get_ipv4(s);
12e41d03 DL	241	}
12e41d03 DL	242	else {
ba634917	243	nexthop_tab[num_ifindex].nexthop_addr.u.prefix4.s_addr = PIM_NET_INADDR_ANY;
12e41d03 DL	244	}
	245	nexthop_tab[num_ifindex].ifindex = stream_getl(s);
	246	nexthop_tab[num_ifindex].protocol_distance = distance;
	247	nexthop_tab[num_ifindex].route_metric = metric;
	248	++num_ifindex;
	249	break;
12c7b75b DS	250	case NEXTHOP_TYPE_IPV6_IFINDEX:
12c7b75b DS	251	nexthop_tab[num_ifindex].nexthop_addr.family = AF_INET6;
4390fb99 DS	252	stream_get (&nexthop_tab[num_ifindex].nexthop_addr.u.prefix6,
	253	s,
	254	sizeof(struct in6_addr));
12c7b75b	255	nexthop_tab[num_ifindex].ifindex = stream_getl (s);
eeff6d3f DS	256
	257	p.family = AF_INET6;
	258	p.prefixlen = IPV6_MAX_PREFIXLEN;
4390fb99 DS	259	memcpy (&p.u.prefix6,
	260	&nexthop_tab[num_ifindex].nexthop_addr.u.prefix6,
	261	sizeof(struct in6_addr));
eeff6d3f DS	262
	263	/*
	264	* If we are sending v6 secondary assume we receive v6 secondary
	265	*/
	266	if (pimg->send_v6_secondary)
	267	nbr = pim_neighbor_find_by_secondary(if_lookup_by_index (nexthop_tab[num_ifindex].ifindex, VRF_DEFAULT), &p);
	268	else
	269	nbr = pim_neighbor_find_if (if_lookup_by_index (nexthop_tab[num_ifindex].ifindex, VRF_DEFAULT));
12c7b75b DS	270	if (nbr)
	271	{
	272	nexthop_tab[num_ifindex].nexthop_addr.family = AF_INET;
	273	nexthop_tab[num_ifindex].nexthop_addr.u.prefix4 = nbr->source_addr;
	274	}
	275	++num_ifindex;
	276	break;
12e41d03 DL	277	default:
	278	/* do nothing */
	279	{
eaa54bdb	280	char addr_str[INET_ADDRSTRLEN];
12e41d03 DL	281	pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str));
	282	zlog_warn("%s %s: found non-ifindex nexthop type=%d for address %s",
	283	__FILE__, __PRETTY_FUNCTION__,
	284	nexthop_type, addr_str);
	285	}
	286	break;
	287	}
	288	}
	289
	290	return num_ifindex;
	291	}
	292
05b0d0d0 DS	293	static int
	294	zclient_lookup_nexthop_once (struct pim_zlookup_nexthop nexthop_tab[],
	295	const int tab_size,
	296	struct in_addr addr)
12e41d03 DL	297	{
	298	struct stream *s;
	299	int ret;
	300
802b226c	301	if (PIM_DEBUG_PIM_TRACE_DETAIL) {
eaa54bdb	302	char addr_str[INET_ADDRSTRLEN];
12e41d03 DL	303	pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str));
	304	zlog_debug("%s: addr=%s",
	305	__PRETTY_FUNCTION__,
	306	addr_str);
	307	}
	308
	309	/* Check socket. */
	310	if (zlookup->sock < 0) {
	311	zlog_err("%s %s: zclient lookup socket is not connected",
	312	__FILE__, __PRETTY_FUNCTION__);
	313	zclient_lookup_failed(zlookup);
	314	return -1;
	315	}
	316
	317	s = zlookup->obuf;
	318	stream_reset(s);
469351b3	319	zclient_create_header(s, ZEBRA_IPV4_NEXTHOP_LOOKUP_MRIB, VRF_DEFAULT);
12e41d03 DL	320	stream_put_in_addr(s, &addr);
	321	stream_putw_at(s, 0, stream_get_endp(s));
	322
	323	ret = writen(zlookup->sock, s->data, stream_get_endp(s));
	324	if (ret < 0) {
5f8fec87 DS	325	zlog_err("%s %s: writen() failure: %d writing to zclient lookup socket",
5f8fec87 DS	326	__FILE__, __PRETTY_FUNCTION__, errno);
12e41d03 DL	327	zclient_lookup_failed(zlookup);
	328	return -2;
	329	}
	330	if (ret == 0) {
	331	zlog_err("%s %s: connection closed on zclient lookup socket",
	332	__FILE__, __PRETTY_FUNCTION__);
	333	zclient_lookup_failed(zlookup);
	334	return -3;
	335	}
	336
	337	return zclient_read_nexthop(zlookup, nexthop_tab,
	338	tab_size, addr);
	339	}
	340
05b0d0d0 DS	341	int
	342	zclient_lookup_nexthop (struct pim_zlookup_nexthop nexthop_tab[],
	343	const int tab_size,
	344	struct in_addr addr,
	345	int max_lookup)
12e41d03 DL	346	{
	347	int lookup;
	348	uint32_t route_metric = 0xFFFFFFFF;
	349	uint8_t protocol_distance = 0xFF;
	350
284b4301 DS	351	qpim_nexthop_lookups++;
284b4301 DS	352
12e41d03 DL	353	for (lookup = 0; lookup < max_lookup; ++lookup) {
	354	int num_ifindex;
	355	int first_ifindex;
ba634917	356	struct prefix nexthop_addr;
12e41d03	357
05b0d0d0	358	num_ifindex = zclient_lookup_nexthop_once(nexthop_tab,
7b2c4d16	359	tab_size, addr);
d5a0a629 DS	360	if (num_ifindex < 1) {
d5a0a629 DS	361	if (PIM_DEBUG_ZEBRA) {
eaa54bdb	362	char addr_str[INET_ADDRSTRLEN];
d5a0a629 DS	363	pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str));
	364	zlog_debug("%s %s: lookup=%d/%d: could not find nexthop ifindex for address %s",
	365	__FILE__, __PRETTY_FUNCTION__,
	366	lookup, max_lookup, addr_str);
	367	}
12e41d03 DL	368	return -1;
	369	}
	370
	371	if (lookup < 1) {
	372	/* this is the non-recursive lookup - save original metric/distance */
	373	route_metric = nexthop_tab[0].route_metric;
	374	protocol_distance = nexthop_tab[0].protocol_distance;
	375	}
	376
	377	/*
d8ba2f4a DS	378	* FIXME: Non-recursive nexthop ensured only for first ifindex.
	379	* However, recursive route lookup should really be fixed in zebra daemon.
	380	* See also TODO T24.
	381	*
	382	* So Zebra for NEXTHOP_TYPE_IPV4 returns the ifindex now since
	383	* it was being stored. This Doesn't solve all cases of
	384	* recursive lookup but for the most common types it does.
12e41d03 DL	385	*/
	386	first_ifindex = nexthop_tab[0].ifindex;
	387	nexthop_addr = nexthop_tab[0].nexthop_addr;
	388	if (first_ifindex > 0) {
	389	/* found: first ifindex is non-recursive nexthop */
	390
d5a0a629	391	if (lookup > 0) {
12e41d03	392	/* Report non-recursive success after first lookup */
d5a0a629	393	if (PIM_DEBUG_ZEBRA) {
eaa54bdb	394	char addr_str[INET_ADDRSTRLEN];
d5a0a629 DS	395	pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str));
	396	zlog_debug("%s %s: lookup=%d/%d: found non-recursive ifindex=%d for address %s dist=%d met=%d",
	397	__FILE__, __PRETTY_FUNCTION__,
	398	lookup, max_lookup, first_ifindex, addr_str,
	399	nexthop_tab[0].protocol_distance,
	400	nexthop_tab[0].route_metric);
	401	}
12e41d03 DL	402
12e41d03 DL	403	/* use last address as nexthop address */
ba634917	404	nexthop_tab[0].nexthop_addr.u.prefix4 = addr;
12e41d03 DL	405
	406	/* report original route metric/distance */
	407	nexthop_tab[0].route_metric = route_metric;
	408	nexthop_tab[0].protocol_distance = protocol_distance;
	409	}
	410
	411	return num_ifindex;
	412	}
	413
7adf0260	414	if (PIM_DEBUG_ZEBRA) {
eaa54bdb DW	415	char addr_str[INET_ADDRSTRLEN];
eaa54bdb DW	416	char nexthop_str[PREFIX_STRLEN];
12e41d03	417	pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str));
ba634917	418	pim_addr_dump("<nexthop?>", &nexthop_addr, nexthop_str, sizeof(nexthop_str));
7adf0260	419	zlog_debug("%s %s: lookup=%d/%d: zebra returned recursive nexthop %s for address %s dist=%d met=%d",
12e41d03 DL	420	__FILE__, __PRETTY_FUNCTION__,
	421	lookup, max_lookup, nexthop_str, addr_str,
	422	nexthop_tab[0].protocol_distance,
	423	nexthop_tab[0].route_metric);
	424	}
	425
ba634917	426	addr = nexthop_addr.u.prefix4; /* use nexthop addr for recursive lookup */
12e41d03 DL	427
	428	} /* for (max_lookup) */
	429
7adf0260	430	if (PIM_DEBUG_ZEBRA) {
eaa54bdb	431	char addr_str[INET_ADDRSTRLEN];
7adf0260 DS	432	pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str));
	433	zlog_warn("%s %s: lookup=%d/%d: failure searching recursive nexthop ifindex for address %s",
	434	__FILE__, __PRETTY_FUNCTION__,
	435	lookup, max_lookup, addr_str);
	436	}
12e41d03 DL	437
	438	return -2;
	439	}
05b0d0d0 DS	440
	441	void
	442	pim_zlookup_show_ip_multicast (struct vty *vty)
	443	{
	444	vty_out(vty, "Zclient lookup socket: ");
	445	if (zlookup) {
	446	vty_out(vty, "%d failures=%d%s", zlookup->sock,
	447	zlookup->fail, VTY_NEWLINE);
	448	}
	449	else {
	450	vty_out(vty, "<null zclient>%s", VTY_NEWLINE);
	451	}
	452	}
e3be0432 DS	453
	454	int
	455	pim_zlookup_sg_statistics (struct channel_oil *c_oil)
	456	{
	457	struct stream *s = zlookup->obuf;
	458	uint16_t command = 0;
	459	unsigned long long lastused;
	460	struct prefix_sg sg;
	461	int count = 0;
	462	int ret;
	463	struct interface *ifp = pim_if_find_by_vif_index (c_oil->oil.mfcc_parent);
	464
	465	if (PIM_DEBUG_ZEBRA)
c7b1183f DS	466	{
	467	struct prefix_sg more;
	468
	469	more.src = c_oil->oil.mfcc_origin;
	470	more.grp = c_oil->oil.mfcc_mcastgrp;
429a291b CS	471	zlog_debug ("Sending Request for New Channel Oil Information(%s) VIIF %d",
429a291b CS	472	pim_str_sg_dump (&more), c_oil->oil.mfcc_parent);
c7b1183f	473	}
e3be0432	474
d1b64e31 DS	475	if (!ifp)
	476	return -1;
	477
e3be0432 DS	478	stream_reset (s);
	479	zclient_create_header (s, ZEBRA_IPMR_ROUTE_STATS, VRF_DEFAULT);
	480	stream_put_in_addr (s, &c_oil->oil.mfcc_origin);
	481	stream_put_in_addr (s, &c_oil->oil.mfcc_mcastgrp);
	482	stream_putl (s, ifp->ifindex);
	483	stream_putw_at(s, 0, stream_get_endp(s));
	484
	485	count = stream_get_endp (s);
	486	ret = writen (zlookup->sock, s->data, count);
	487	if (ret <= 0)
	488	{
5f8fec87 DS	489	zlog_err("%s %s: writen() failure: %d writing to zclient lookup socket",
5f8fec87 DS	490	__FILE__, __PRETTY_FUNCTION__, errno);
e3be0432 DS	491	return -1;
	492	}
	493
	494	s = zlookup->ibuf;
	495
	496	while (command != ZEBRA_IPMR_ROUTE_STATS)
	497	{
	498	int err;
	499	uint16_t length = 0;
	500	vrf_id_t vrf_id;
	501	u_char marker;
	502	u_char version;
	503
	504	stream_reset (s);
	505	err = zclient_read_header (s, zlookup->sock, &length, &marker, &version,
	506	&vrf_id, &command);
	507	if (err < 0)
	508	{
	509	zlog_err ("%s %s: zclient_read_header() failed",
	510	__FILE__, __PRETTY_FUNCTION__);
	511	zclient_lookup_failed(zlookup);
	512	return -1;
	513	}
	514	}
	515
	516	sg.src.s_addr = stream_get_ipv4 (s);
	517	sg.grp.s_addr = stream_get_ipv4 (s);
	518	if (sg.src.s_addr != c_oil->oil.mfcc_origin.s_addr \|\|
	519	sg.grp.s_addr != c_oil->oil.mfcc_mcastgrp.s_addr)
	520	{
	521	zlog_err ("%s: Received wrong %s information",
	522	__PRETTY_FUNCTION__, pim_str_sg_dump (&sg));
	523	zclient_lookup_failed (zlookup);
	524	return -3;
	525	}
	526
	527	stream_get (&lastused, s, sizeof (lastused));
9a5aa742	528	ret = stream_getl (s);
e3be0432	529
8d63c2d9	530	if (PIM_DEBUG_ZEBRA)
9a5aa742	531	zlog_debug ("Received %lld for %s success: %d", lastused, pim_str_sg_dump (&sg), ret);
e3be0432 DS	532
	533	c_oil->cc.lastused = lastused;
	534
	535	return 0;
	536
	537	}