[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);

  zlookup->t_connect = thread_add_event(master, zclient_lookup_connect,
                                        zlookup, 0, NULL);

  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 DL	1	/*
	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
	16	along with this program; see the file COPYING; if not, write to the
	17	Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
	18	MA 02110-1301 USA
12e41d03 DL	19	*/
	20
	21	#include <zebra.h>
	22	#include "zebra/rib.h"
	23
	24	#include "log.h"
	25	#include "prefix.h"
	26	#include "zclient.h"
	27	#include "stream.h"
	28	#include "network.h"
	29	#include "thread.h"
e3be0432	30	#include "prefix.h"
05b0d0d0	31	#include "vty.h"
12e41d03 DL	32
12e41d03 DL	33	#include "pimd.h"
e3be0432	34	#include "pim_iface.h"
12e41d03 DL	35	#include "pim_pim.h"
12e41d03 DL	36	#include "pim_str.h"
e3be0432	37	#include "pim_oil.h"
12e41d03 DL	38	#include "pim_zlookup.h"
12e41d03 DL	39
05b0d0d0 DS	40	static struct zclient *zlookup = NULL;
05b0d0d0 DS	41
12e41d03 DL	42	static void zclient_lookup_sched(struct zclient *zlookup, int delay);
	43
	44	/* Connect to zebra for nexthop lookup. */
	45	static int zclient_lookup_connect(struct thread *t)
	46	{
	47	struct zclient *zlookup;
	48
	49	zlookup = THREAD_ARG(t);
	50	zlookup->t_connect = NULL;
	51
	52	if (zlookup->sock >= 0) {
	53	return 0;
	54	}
	55
	56	if (zclient_socket_connect(zlookup) < 0) {
	57	++zlookup->fail;
	58	zlog_warn("%s: failure connecting zclient socket: failures=%d",
	59	__PRETTY_FUNCTION__, zlookup->fail);
	60	}
	61	else {
	62	zlookup->fail = 0; /* reset counter on connection */
	63	}
	64
	65	zassert(!zlookup->t_connect);
	66	if (zlookup->sock < 0) {
	67	/* Since last connect failed, retry within 10 secs */
	68	zclient_lookup_sched(zlookup, 10);
	69	return -1;
	70	}
	71
	72	return 0;
	73	}
	74
	75	/* Schedule connection with delay. */
	76	static void zclient_lookup_sched(struct zclient *zlookup, int delay)
	77	{
	78	zassert(!zlookup->t_connect);
	79
ffa2c898 QY	80	thread_add_timer(master, zclient_lookup_connect, zlookup, delay,
ffa2c898 QY	81	&zlookup->t_connect);
12e41d03 DL	82
	83	zlog_notice("%s: zclient lookup connection scheduled for %d seconds",
	84	__PRETTY_FUNCTION__, delay);
	85	}
	86
	87	/* Schedule connection for now. */
	88	static void zclient_lookup_sched_now(struct zclient *zlookup)
	89	{
	90	zassert(!zlookup->t_connect);
	91
	92	zlookup->t_connect = thread_add_event(master, zclient_lookup_connect,
ffa2c898	93	zlookup, 0, NULL);
12e41d03 DL	94
	95	zlog_notice("%s: zclient lookup immediate connection scheduled",
	96	__PRETTY_FUNCTION__);
	97	}
	98
	99	/* Schedule reconnection, if needed. */
	100	static void zclient_lookup_reconnect(struct zclient *zlookup)
	101	{
	102	if (zlookup->t_connect) {
	103	return;
	104	}
	105
	106	zclient_lookup_sched_now(zlookup);
	107	}
	108
	109	static void zclient_lookup_failed(struct zclient *zlookup)
	110	{
	111	if (zlookup->sock >= 0) {
	112	if (close(zlookup->sock)) {
	113	zlog_warn("%s: closing fd=%d: errno=%d %s", __func__, zlookup->sock,
	114	errno, safe_strerror(errno));
	115	}
	116	zlookup->sock = -1;
	117	}
	118
	119	zclient_lookup_reconnect(zlookup);
	120	}
	121
0b6817c5 DS	122	void
	123	zclient_lookup_free (void)
	124	{
	125	zclient_free (zlookup);
	126	zlookup = NULL;
	127	}
	128
05b0d0d0 DS	129	void
05b0d0d0 DS	130	zclient_lookup_new (void)
12e41d03	131	{
469351b3	132	zlookup = zclient_new (master);
12e41d03 DL	133	if (!zlookup) {
	134	zlog_err("%s: zclient_new() failure",
	135	__PRETTY_FUNCTION__);
05b0d0d0	136	return;
12e41d03 DL	137	}
	138
	139	zlookup->sock = -1;
0b6817c5	140	zlookup->t_connect = NULL;
12e41d03 DL	141
	142	zclient_lookup_sched_now(zlookup);
	143
	144	zlog_notice("%s: zclient lookup socket initialized",
	145	__PRETTY_FUNCTION__);
	146
12e41d03 DL	147	}
	148
	149	static int zclient_read_nexthop(struct zclient *zlookup,
	150	struct pim_zlookup_nexthop nexthop_tab[],
	151	const int tab_size,
	152	struct in_addr addr)
	153	{
	154	int num_ifindex = 0;
	155	struct stream *s;
55119089 ND	156	const uint16_t MIN_LEN = 10; /* getipv4=4 getc=1 getl=4 getc=1 */
55119089 ND	157	uint16_t length;
12e41d03 DL	158	u_char marker;
12e41d03 DL	159	u_char version;
e7a2870b	160	vrf_id_t vrf_id;
78d3e257	161	uint16_t command = 0;
12e41d03 DL	162	struct in_addr raddr;
	163	uint8_t distance;
	164	uint32_t metric;
	165	int nexthop_num;
55119089	166	int i, err;
12e41d03	167
802b226c	168	if (PIM_DEBUG_PIM_TRACE_DETAIL) {
eaa54bdb	169	char addr_str[INET_ADDRSTRLEN];
12e41d03 DL	170	pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str));
	171	zlog_debug("%s: addr=%s",
	172	__PRETTY_FUNCTION__,
	173	addr_str);
	174	}
	175
	176	s = zlookup->ibuf;
12e41d03	177
78d3e257 DS	178	while (command != ZEBRA_IPV4_NEXTHOP_LOOKUP_MRIB)
	179	{
	180	stream_reset(s);
	181	err = zclient_read_header (s, zlookup->sock, &length, &marker, &version,
	182	&vrf_id, &command);
	183	if (err < 0) {
	184	zlog_err("%s %s: zclient_read_header() failed",
	185	__FILE__, __PRETTY_FUNCTION__);
	186	zclient_lookup_failed(zlookup);
	187	return -1;
	188	}
	189
	190	if (length < MIN_LEN) {
	191	zlog_err("%s %s: failure reading zclient lookup socket: len=%d < MIN_LEN=%d",
	192	__FILE__, __PRETTY_FUNCTION__, length, MIN_LEN);
	193	zclient_lookup_failed(zlookup);
	194	return -2;
	195	}
78d3e257	196	}
12e41d03 DL	197
	198	raddr.s_addr = stream_get_ipv4(s);
	199
	200	if (raddr.s_addr != addr.s_addr) {
eaa54bdb DW	201	char addr_str[INET_ADDRSTRLEN];
eaa54bdb DW	202	char raddr_str[INET_ADDRSTRLEN];
12e41d03 DL	203	pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str));
	204	pim_inet4_dump("<raddr?>", raddr, raddr_str, sizeof(raddr_str));
	205	zlog_warn("%s: address mismatch: addr=%s raddr=%s",
	206	__PRETTY_FUNCTION__,
	207	addr_str, raddr_str);
	208	/* warning only */
	209	}
	210
	211	distance = stream_getc(s);
	212	metric = stream_getl(s);
	213	nexthop_num = stream_getc(s);
	214
	215	if (nexthop_num < 1) {
	216	zlog_err("%s: socket %d bad nexthop_num=%d",
	217	__func__, zlookup->sock, nexthop_num);
	218	return -6;
	219	}
	220
12e41d03 DL	221	for (i = 0; i < nexthop_num; ++i) {
12e41d03 DL	222	enum nexthop_types_t nexthop_type;
12c7b75b	223	struct pim_neighbor *nbr;
eeff6d3f	224	struct prefix p;
12e41d03	225
12e41d03	226	nexthop_type = stream_getc(s);
84a35fdf	227	if (num_ifindex >= tab_size) {
eaa54bdb	228	char addr_str[INET_ADDRSTRLEN];
84a35fdf DS	229	pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str));
	230	zlog_warn("%s %s: found too many nexthop ifindexes (%d > %d) for address %s",
	231	__FILE__, __PRETTY_FUNCTION__,
	232	(num_ifindex + 1), tab_size, addr_str);
	233	return num_ifindex;
	234	}
12e41d03	235	switch (nexthop_type) {
5b30316e DS	236	case NEXTHOP_TYPE_IFINDEX:
5b30316e DS	237	case NEXTHOP_TYPE_IPV4_IFINDEX:
d4a2bc11	238	case NEXTHOP_TYPE_IPV4:
ba634917	239	nexthop_tab[num_ifindex].nexthop_addr.family = AF_INET;
d4a2bc11 DS	240	if (nexthop_type == NEXTHOP_TYPE_IPV4_IFINDEX \|\|
d4a2bc11 DS	241	nexthop_type == NEXTHOP_TYPE_IPV4) {
ba634917	242	nexthop_tab[num_ifindex].nexthop_addr.u.prefix4.s_addr = stream_get_ipv4(s);
12e41d03 DL	243	}
12e41d03 DL	244	else {
ba634917	245	nexthop_tab[num_ifindex].nexthop_addr.u.prefix4.s_addr = PIM_NET_INADDR_ANY;
12e41d03 DL	246	}
	247	nexthop_tab[num_ifindex].ifindex = stream_getl(s);
	248	nexthop_tab[num_ifindex].protocol_distance = distance;
	249	nexthop_tab[num_ifindex].route_metric = metric;
	250	++num_ifindex;
	251	break;
12c7b75b DS	252	case NEXTHOP_TYPE_IPV6_IFINDEX:
12c7b75b DS	253	nexthop_tab[num_ifindex].nexthop_addr.family = AF_INET6;
4390fb99 DS	254	stream_get (&nexthop_tab[num_ifindex].nexthop_addr.u.prefix6,
	255	s,
	256	sizeof(struct in6_addr));
12c7b75b	257	nexthop_tab[num_ifindex].ifindex = stream_getl (s);
eeff6d3f DS	258
	259	p.family = AF_INET6;
	260	p.prefixlen = IPV6_MAX_PREFIXLEN;
4390fb99 DS	261	memcpy (&p.u.prefix6,
	262	&nexthop_tab[num_ifindex].nexthop_addr.u.prefix6,
	263	sizeof(struct in6_addr));
eeff6d3f DS	264
	265	/*
	266	* If we are sending v6 secondary assume we receive v6 secondary
	267	*/
	268	if (pimg->send_v6_secondary)
	269	nbr = pim_neighbor_find_by_secondary(if_lookup_by_index (nexthop_tab[num_ifindex].ifindex, VRF_DEFAULT), &p);
	270	else
	271	nbr = pim_neighbor_find_if (if_lookup_by_index (nexthop_tab[num_ifindex].ifindex, VRF_DEFAULT));
12c7b75b DS	272	if (nbr)
	273	{
	274	nexthop_tab[num_ifindex].nexthop_addr.family = AF_INET;
	275	nexthop_tab[num_ifindex].nexthop_addr.u.prefix4 = nbr->source_addr;
	276	}
	277	++num_ifindex;
	278	break;
12e41d03 DL	279	default:
	280	/* do nothing */
	281	{
eaa54bdb	282	char addr_str[INET_ADDRSTRLEN];
12e41d03 DL	283	pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str));
	284	zlog_warn("%s %s: found non-ifindex nexthop type=%d for address %s",
	285	__FILE__, __PRETTY_FUNCTION__,
	286	nexthop_type, addr_str);
	287	}
	288	break;
	289	}
	290	}
	291
	292	return num_ifindex;
	293	}
	294
05b0d0d0 DS	295	static int
	296	zclient_lookup_nexthop_once (struct pim_zlookup_nexthop nexthop_tab[],
	297	const int tab_size,
	298	struct in_addr addr)
12e41d03 DL	299	{
	300	struct stream *s;
	301	int ret;
	302
802b226c	303	if (PIM_DEBUG_PIM_TRACE_DETAIL) {
eaa54bdb	304	char addr_str[INET_ADDRSTRLEN];
12e41d03 DL	305	pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str));
	306	zlog_debug("%s: addr=%s",
	307	__PRETTY_FUNCTION__,
	308	addr_str);
	309	}
	310
	311	/* Check socket. */
	312	if (zlookup->sock < 0) {
	313	zlog_err("%s %s: zclient lookup socket is not connected",
	314	__FILE__, __PRETTY_FUNCTION__);
	315	zclient_lookup_failed(zlookup);
	316	return -1;
	317	}
	318
	319	s = zlookup->obuf;
	320	stream_reset(s);
469351b3	321	zclient_create_header(s, ZEBRA_IPV4_NEXTHOP_LOOKUP_MRIB, VRF_DEFAULT);
12e41d03 DL	322	stream_put_in_addr(s, &addr);
	323	stream_putw_at(s, 0, stream_get_endp(s));
	324
	325	ret = writen(zlookup->sock, s->data, stream_get_endp(s));
	326	if (ret < 0) {
5f8fec87 DS	327	zlog_err("%s %s: writen() failure: %d writing to zclient lookup socket",
5f8fec87 DS	328	__FILE__, __PRETTY_FUNCTION__, errno);
12e41d03 DL	329	zclient_lookup_failed(zlookup);
	330	return -2;
	331	}
	332	if (ret == 0) {
	333	zlog_err("%s %s: connection closed on zclient lookup socket",
	334	__FILE__, __PRETTY_FUNCTION__);
	335	zclient_lookup_failed(zlookup);
	336	return -3;
	337	}
	338
	339	return zclient_read_nexthop(zlookup, nexthop_tab,
	340	tab_size, addr);
	341	}
	342
05b0d0d0 DS	343	int
	344	zclient_lookup_nexthop (struct pim_zlookup_nexthop nexthop_tab[],
	345	const int tab_size,
	346	struct in_addr addr,
	347	int max_lookup)
12e41d03 DL	348	{
	349	int lookup;
	350	uint32_t route_metric = 0xFFFFFFFF;
	351	uint8_t protocol_distance = 0xFF;
	352
284b4301 DS	353	qpim_nexthop_lookups++;
284b4301 DS	354
12e41d03 DL	355	for (lookup = 0; lookup < max_lookup; ++lookup) {
	356	int num_ifindex;
	357	int first_ifindex;
ba634917	358	struct prefix nexthop_addr;
12e41d03	359
05b0d0d0	360	num_ifindex = zclient_lookup_nexthop_once(nexthop_tab,
7b2c4d16	361	tab_size, addr);
d5a0a629 DS	362	if (num_ifindex < 1) {
d5a0a629 DS	363	if (PIM_DEBUG_ZEBRA) {
eaa54bdb	364	char addr_str[INET_ADDRSTRLEN];
d5a0a629 DS	365	pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str));
	366	zlog_debug("%s %s: lookup=%d/%d: could not find nexthop ifindex for address %s",
	367	__FILE__, __PRETTY_FUNCTION__,
	368	lookup, max_lookup, addr_str);
	369	}
12e41d03 DL	370	return -1;
	371	}
	372
	373	if (lookup < 1) {
	374	/* this is the non-recursive lookup - save original metric/distance */
	375	route_metric = nexthop_tab[0].route_metric;
	376	protocol_distance = nexthop_tab[0].protocol_distance;
	377	}
	378
	379	/*
d8ba2f4a DS	380	* FIXME: Non-recursive nexthop ensured only for first ifindex.
	381	* However, recursive route lookup should really be fixed in zebra daemon.
	382	* See also TODO T24.
	383	*
	384	* So Zebra for NEXTHOP_TYPE_IPV4 returns the ifindex now since
	385	* it was being stored. This Doesn't solve all cases of
	386	* recursive lookup but for the most common types it does.
12e41d03 DL	387	*/
	388	first_ifindex = nexthop_tab[0].ifindex;
	389	nexthop_addr = nexthop_tab[0].nexthop_addr;
	390	if (first_ifindex > 0) {
	391	/* found: first ifindex is non-recursive nexthop */
	392
d5a0a629	393	if (lookup > 0) {
12e41d03	394	/* Report non-recursive success after first lookup */
d5a0a629	395	if (PIM_DEBUG_ZEBRA) {
eaa54bdb	396	char addr_str[INET_ADDRSTRLEN];
d5a0a629 DS	397	pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str));
	398	zlog_debug("%s %s: lookup=%d/%d: found non-recursive ifindex=%d for address %s dist=%d met=%d",
	399	__FILE__, __PRETTY_FUNCTION__,
	400	lookup, max_lookup, first_ifindex, addr_str,
	401	nexthop_tab[0].protocol_distance,
	402	nexthop_tab[0].route_metric);
	403	}
12e41d03 DL	404
12e41d03 DL	405	/* use last address as nexthop address */
ba634917	406	nexthop_tab[0].nexthop_addr.u.prefix4 = addr;
12e41d03 DL	407
	408	/* report original route metric/distance */
	409	nexthop_tab[0].route_metric = route_metric;
	410	nexthop_tab[0].protocol_distance = protocol_distance;
	411	}
	412
	413	return num_ifindex;
	414	}
	415
7adf0260	416	if (PIM_DEBUG_ZEBRA) {
eaa54bdb DW	417	char addr_str[INET_ADDRSTRLEN];
eaa54bdb DW	418	char nexthop_str[PREFIX_STRLEN];
12e41d03	419	pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str));
ba634917	420	pim_addr_dump("<nexthop?>", &nexthop_addr, nexthop_str, sizeof(nexthop_str));
7adf0260	421	zlog_debug("%s %s: lookup=%d/%d: zebra returned recursive nexthop %s for address %s dist=%d met=%d",
12e41d03 DL	422	__FILE__, __PRETTY_FUNCTION__,
	423	lookup, max_lookup, nexthop_str, addr_str,
	424	nexthop_tab[0].protocol_distance,
	425	nexthop_tab[0].route_metric);
	426	}
	427
ba634917	428	addr = nexthop_addr.u.prefix4; /* use nexthop addr for recursive lookup */
12e41d03 DL	429
	430	} /* for (max_lookup) */
	431
7adf0260	432	if (PIM_DEBUG_ZEBRA) {
eaa54bdb	433	char addr_str[INET_ADDRSTRLEN];
7adf0260 DS	434	pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str));
	435	zlog_warn("%s %s: lookup=%d/%d: failure searching recursive nexthop ifindex for address %s",
	436	__FILE__, __PRETTY_FUNCTION__,
	437	lookup, max_lookup, addr_str);
	438	}
12e41d03 DL	439
	440	return -2;
	441	}
05b0d0d0 DS	442
	443	void
	444	pim_zlookup_show_ip_multicast (struct vty *vty)
	445	{
	446	vty_out(vty, "Zclient lookup socket: ");
	447	if (zlookup) {
	448	vty_out(vty, "%d failures=%d%s", zlookup->sock,
	449	zlookup->fail, VTY_NEWLINE);
	450	}
	451	else {
	452	vty_out(vty, "<null zclient>%s", VTY_NEWLINE);
	453	}
	454	}
e3be0432 DS	455
	456	int
	457	pim_zlookup_sg_statistics (struct channel_oil *c_oil)
	458	{
	459	struct stream *s = zlookup->obuf;
	460	uint16_t command = 0;
	461	unsigned long long lastused;
	462	struct prefix_sg sg;
	463	int count = 0;
	464	int ret;
	465	struct interface *ifp = pim_if_find_by_vif_index (c_oil->oil.mfcc_parent);
	466
	467	if (PIM_DEBUG_ZEBRA)
c7b1183f DS	468	{
	469	struct prefix_sg more;
	470
	471	more.src = c_oil->oil.mfcc_origin;
	472	more.grp = c_oil->oil.mfcc_mcastgrp;
429a291b CS	473	zlog_debug ("Sending Request for New Channel Oil Information(%s) VIIF %d",
429a291b CS	474	pim_str_sg_dump (&more), c_oil->oil.mfcc_parent);
c7b1183f	475	}
e3be0432	476
d1b64e31 DS	477	if (!ifp)
	478	return -1;
	479
e3be0432 DS	480	stream_reset (s);
	481	zclient_create_header (s, ZEBRA_IPMR_ROUTE_STATS, VRF_DEFAULT);
	482	stream_put_in_addr (s, &c_oil->oil.mfcc_origin);
	483	stream_put_in_addr (s, &c_oil->oil.mfcc_mcastgrp);
	484	stream_putl (s, ifp->ifindex);
	485	stream_putw_at(s, 0, stream_get_endp(s));
	486
	487	count = stream_get_endp (s);
	488	ret = writen (zlookup->sock, s->data, count);
	489	if (ret <= 0)
	490	{
5f8fec87 DS	491	zlog_err("%s %s: writen() failure: %d writing to zclient lookup socket",
5f8fec87 DS	492	__FILE__, __PRETTY_FUNCTION__, errno);
e3be0432 DS	493	return -1;
	494	}
	495
	496	s = zlookup->ibuf;
	497
	498	while (command != ZEBRA_IPMR_ROUTE_STATS)
	499	{
	500	int err;
	501	uint16_t length = 0;
	502	vrf_id_t vrf_id;
	503	u_char marker;
	504	u_char version;
	505
	506	stream_reset (s);
	507	err = zclient_read_header (s, zlookup->sock, &length, &marker, &version,
	508	&vrf_id, &command);
	509	if (err < 0)
	510	{
	511	zlog_err ("%s %s: zclient_read_header() failed",
	512	__FILE__, __PRETTY_FUNCTION__);
	513	zclient_lookup_failed(zlookup);
	514	return -1;
	515	}
	516	}
	517
	518	sg.src.s_addr = stream_get_ipv4 (s);
	519	sg.grp.s_addr = stream_get_ipv4 (s);
	520	if (sg.src.s_addr != c_oil->oil.mfcc_origin.s_addr \|\|
	521	sg.grp.s_addr != c_oil->oil.mfcc_mcastgrp.s_addr)
	522	{
	523	zlog_err ("%s: Received wrong %s information",
	524	__PRETTY_FUNCTION__, pim_str_sg_dump (&sg));
	525	zclient_lookup_failed (zlookup);
	526	return -3;
	527	}
	528
	529	stream_get (&lastused, s, sizeof (lastused));
9a5aa742	530	ret = stream_getl (s);
e3be0432	531
8d63c2d9	532	if (PIM_DEBUG_ZEBRA)
9a5aa742	533	zlog_debug ("Received %lld for %s success: %d", lastused, pim_str_sg_dump (&sg), ret);
e3be0432 DS	534
	535	c_oil->cc.lastused = lastused;
	536
	537	return 0;
	538
	539	}