[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_TIMER_ON(master, zlookup->t_connect,
		  zclient_lookup_connect,
		  zlookup, delay);

  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);

  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
	80	THREAD_TIMER_ON(master, zlookup->t_connect,
	81	zclient_lookup_connect,
	82	zlookup, delay);
	83
	84	zlog_notice("%s: zclient lookup connection scheduled for %d seconds",
	85	__PRETTY_FUNCTION__, delay);
	86	}
	87
	88	/* Schedule connection for now. */
	89	static void zclient_lookup_sched_now(struct zclient *zlookup)
	90	{
	91	zassert(!zlookup->t_connect);
	92
	93	zlookup->t_connect = thread_add_event(master, zclient_lookup_connect,
	94	zlookup, 0);
	95
	96	zlog_notice("%s: zclient lookup immediate connection scheduled",
	97	__PRETTY_FUNCTION__);
	98	}
	99
	100	/* Schedule reconnection, if needed. */
	101	static void zclient_lookup_reconnect(struct zclient *zlookup)
	102	{
	103	if (zlookup->t_connect) {
	104	return;
	105	}
106
107	zclient_lookup_sched_now(zlookup);
108	}
109
110	static void zclient_lookup_failed(struct zclient *zlookup)
111	{
112	if (zlookup->sock >= 0) {
113	if (close(zlookup->sock)) {
114	zlog_warn("%s: closing fd=%d: errno=%d %s", __func__, zlookup->sock,
115	errno, safe_strerror(errno));
116	}
117	zlookup->sock = -1;
118	}
119
120	zclient_lookup_reconnect(zlookup);
121	}
122
0b6817c5 DS	123	void
	124	zclient_lookup_free (void)
	125	{
	126	zclient_free (zlookup);
	127	zlookup = NULL;
	128	}
	129
05b0d0d0 DS	130	void
05b0d0d0 DS	131	zclient_lookup_new (void)
12e41d03	132	{
469351b3	133	zlookup = zclient_new (master);
12e41d03 DL	134	if (!zlookup) {
	135	zlog_err("%s: zclient_new() failure",
	136	__PRETTY_FUNCTION__);
05b0d0d0	137	return;
12e41d03 DL	138	}
	139
	140	zlookup->sock = -1;
0b6817c5	141	zlookup->t_connect = NULL;
12e41d03 DL	142
	143	zclient_lookup_sched_now(zlookup);
	144
	145	zlog_notice("%s: zclient lookup socket initialized",
	146	__PRETTY_FUNCTION__);
	147
12e41d03 DL	148	}
	149
	150	static int zclient_read_nexthop(struct zclient *zlookup,
	151	struct pim_zlookup_nexthop nexthop_tab[],
	152	const int tab_size,
	153	struct in_addr addr)
	154	{
	155	int num_ifindex = 0;
	156	struct stream *s;
55119089 ND	157	const uint16_t MIN_LEN = 10; /* getipv4=4 getc=1 getl=4 getc=1 */
55119089 ND	158	uint16_t length;
12e41d03 DL	159	u_char marker;
12e41d03 DL	160	u_char version;
e7a2870b	161	vrf_id_t vrf_id;
78d3e257	162	uint16_t command = 0;
12e41d03 DL	163	struct in_addr raddr;
	164	uint8_t distance;
	165	uint32_t metric;
	166	int nexthop_num;
55119089	167	int i, err;
12e41d03	168
802b226c	169	if (PIM_DEBUG_PIM_TRACE_DETAIL) {
eaa54bdb	170	char addr_str[INET_ADDRSTRLEN];
12e41d03 DL	171	pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str));
	172	zlog_debug("%s: addr=%s",
	173	__PRETTY_FUNCTION__,
	174	addr_str);
	175	}
	176
	177	s = zlookup->ibuf;
12e41d03	178
78d3e257 DS	179	while (command != ZEBRA_IPV4_NEXTHOP_LOOKUP_MRIB)
	180	{
	181	stream_reset(s);
	182	err = zclient_read_header (s, zlookup->sock, &length, &marker, &version,
	183	&vrf_id, &command);
	184	if (err < 0) {
	185	zlog_err("%s %s: zclient_read_header() failed",
	186	__FILE__, __PRETTY_FUNCTION__);
	187	zclient_lookup_failed(zlookup);
	188	return -1;
	189	}
	190
	191	if (length < MIN_LEN) {
	192	zlog_err("%s %s: failure reading zclient lookup socket: len=%d < MIN_LEN=%d",
	193	__FILE__, __PRETTY_FUNCTION__, length, MIN_LEN);
	194	zclient_lookup_failed(zlookup);
	195	return -2;
	196	}
78d3e257	197	}
12e41d03 DL	198
	199	raddr.s_addr = stream_get_ipv4(s);
	200
	201	if (raddr.s_addr != addr.s_addr) {
eaa54bdb DW	202	char addr_str[INET_ADDRSTRLEN];
eaa54bdb DW	203	char raddr_str[INET_ADDRSTRLEN];
12e41d03 DL	204	pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str));
	205	pim_inet4_dump("<raddr?>", raddr, raddr_str, sizeof(raddr_str));
	206	zlog_warn("%s: address mismatch: addr=%s raddr=%s",
	207	__PRETTY_FUNCTION__,
	208	addr_str, raddr_str);
	209	/* warning only */
	210	}
	211
	212	distance = stream_getc(s);
	213	metric = stream_getl(s);
	214	nexthop_num = stream_getc(s);
	215
	216	if (nexthop_num < 1) {
	217	zlog_err("%s: socket %d bad nexthop_num=%d",
	218	__func__, zlookup->sock, nexthop_num);
	219	return -6;
	220	}
	221
12e41d03 DL	222	for (i = 0; i < nexthop_num; ++i) {
12e41d03 DL	223	enum nexthop_types_t nexthop_type;
12c7b75b	224	struct pim_neighbor *nbr;
eeff6d3f	225	struct prefix p;
12e41d03	226
12e41d03	227	nexthop_type = stream_getc(s);
84a35fdf	228	if (num_ifindex >= tab_size) {
eaa54bdb	229	char addr_str[INET_ADDRSTRLEN];
84a35fdf DS	230	pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str));
	231	zlog_warn("%s %s: found too many nexthop ifindexes (%d > %d) for address %s",
	232	__FILE__, __PRETTY_FUNCTION__,
	233	(num_ifindex + 1), tab_size, addr_str);
	234	return num_ifindex;
	235	}
12e41d03	236	switch (nexthop_type) {
5b30316e DS	237	case NEXTHOP_TYPE_IFINDEX:
5b30316e DS	238	case NEXTHOP_TYPE_IPV4_IFINDEX:
d4a2bc11	239	case NEXTHOP_TYPE_IPV4:
ba634917	240	nexthop_tab[num_ifindex].nexthop_addr.family = AF_INET;
d4a2bc11 DS	241	if (nexthop_type == NEXTHOP_TYPE_IPV4_IFINDEX \|\|
d4a2bc11 DS	242	nexthop_type == NEXTHOP_TYPE_IPV4) {
ba634917	243	nexthop_tab[num_ifindex].nexthop_addr.u.prefix4.s_addr = stream_get_ipv4(s);
12e41d03 DL	244	}
12e41d03 DL	245	else {
ba634917	246	nexthop_tab[num_ifindex].nexthop_addr.u.prefix4.s_addr = PIM_NET_INADDR_ANY;
12e41d03 DL	247	}
	248	nexthop_tab[num_ifindex].ifindex = stream_getl(s);
	249	nexthop_tab[num_ifindex].protocol_distance = distance;
	250	nexthop_tab[num_ifindex].route_metric = metric;
	251	++num_ifindex;
	252	break;
12c7b75b DS	253	case NEXTHOP_TYPE_IPV6_IFINDEX:
12c7b75b DS	254	nexthop_tab[num_ifindex].nexthop_addr.family = AF_INET6;
4390fb99 DS	255	stream_get (&nexthop_tab[num_ifindex].nexthop_addr.u.prefix6,
	256	s,
	257	sizeof(struct in6_addr));
12c7b75b	258	nexthop_tab[num_ifindex].ifindex = stream_getl (s);
eeff6d3f DS	259
	260	p.family = AF_INET6;
	261	p.prefixlen = IPV6_MAX_PREFIXLEN;
4390fb99 DS	262	memcpy (&p.u.prefix6,
	263	&nexthop_tab[num_ifindex].nexthop_addr.u.prefix6,
	264	sizeof(struct in6_addr));
eeff6d3f DS	265
	266	/*
	267	* If we are sending v6 secondary assume we receive v6 secondary
	268	*/
	269	if (pimg->send_v6_secondary)
	270	nbr = pim_neighbor_find_by_secondary(if_lookup_by_index (nexthop_tab[num_ifindex].ifindex, VRF_DEFAULT), &p);
	271	else
	272	nbr = pim_neighbor_find_if (if_lookup_by_index (nexthop_tab[num_ifindex].ifindex, VRF_DEFAULT));
12c7b75b DS	273	if (nbr)
	274	{
	275	nexthop_tab[num_ifindex].nexthop_addr.family = AF_INET;
	276	nexthop_tab[num_ifindex].nexthop_addr.u.prefix4 = nbr->source_addr;
	277	}
	278	++num_ifindex;
	279	break;
12e41d03 DL	280	default:
	281	/* do nothing */
	282	{
eaa54bdb	283	char addr_str[INET_ADDRSTRLEN];
12e41d03 DL	284	pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str));
	285	zlog_warn("%s %s: found non-ifindex nexthop type=%d for address %s",
	286	__FILE__, __PRETTY_FUNCTION__,
	287	nexthop_type, addr_str);
	288	}
	289	break;
	290	}
	291	}
	292
	293	return num_ifindex;
	294	}
	295
05b0d0d0 DS	296	static int
	297	zclient_lookup_nexthop_once (struct pim_zlookup_nexthop nexthop_tab[],
	298	const int tab_size,
	299	struct in_addr addr)
12e41d03 DL	300	{
	301	struct stream *s;
	302	int ret;
	303
802b226c	304	if (PIM_DEBUG_PIM_TRACE_DETAIL) {
eaa54bdb	305	char addr_str[INET_ADDRSTRLEN];
12e41d03 DL	306	pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str));
	307	zlog_debug("%s: addr=%s",
	308	__PRETTY_FUNCTION__,
	309	addr_str);
	310	}
	311
	312	/* Check socket. */
	313	if (zlookup->sock < 0) {
	314	zlog_err("%s %s: zclient lookup socket is not connected",
	315	__FILE__, __PRETTY_FUNCTION__);
	316	zclient_lookup_failed(zlookup);
	317	return -1;
	318	}
	319
	320	s = zlookup->obuf;
	321	stream_reset(s);
469351b3	322	zclient_create_header(s, ZEBRA_IPV4_NEXTHOP_LOOKUP_MRIB, VRF_DEFAULT);
12e41d03 DL	323	stream_put_in_addr(s, &addr);
	324	stream_putw_at(s, 0, stream_get_endp(s));
	325
	326	ret = writen(zlookup->sock, s->data, stream_get_endp(s));
	327	if (ret < 0) {
5f8fec87 DS	328	zlog_err("%s %s: writen() failure: %d writing to zclient lookup socket",
5f8fec87 DS	329	__FILE__, __PRETTY_FUNCTION__, errno);
12e41d03 DL	330	zclient_lookup_failed(zlookup);
	331	return -2;
	332	}
	333	if (ret == 0) {
	334	zlog_err("%s %s: connection closed on zclient lookup socket",
	335	__FILE__, __PRETTY_FUNCTION__);
	336	zclient_lookup_failed(zlookup);
	337	return -3;
	338	}
	339
	340	return zclient_read_nexthop(zlookup, nexthop_tab,
	341	tab_size, addr);
	342	}
	343
05b0d0d0 DS	344	int
	345	zclient_lookup_nexthop (struct pim_zlookup_nexthop nexthop_tab[],
	346	const int tab_size,
	347	struct in_addr addr,
	348	int max_lookup)
12e41d03 DL	349	{
	350	int lookup;
	351	uint32_t route_metric = 0xFFFFFFFF;
	352	uint8_t protocol_distance = 0xFF;
	353
284b4301 DS	354	qpim_nexthop_lookups++;
284b4301 DS	355
12e41d03 DL	356	for (lookup = 0; lookup < max_lookup; ++lookup) {
	357	int num_ifindex;
	358	int first_ifindex;
ba634917	359	struct prefix nexthop_addr;
12e41d03	360
05b0d0d0	361	num_ifindex = zclient_lookup_nexthop_once(nexthop_tab,
7b2c4d16	362	tab_size, addr);
d5a0a629 DS	363	if (num_ifindex < 1) {
d5a0a629 DS	364	if (PIM_DEBUG_ZEBRA) {
eaa54bdb	365	char addr_str[INET_ADDRSTRLEN];
d5a0a629 DS	366	pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str));
	367	zlog_debug("%s %s: lookup=%d/%d: could not find nexthop ifindex for address %s",
	368	__FILE__, __PRETTY_FUNCTION__,
	369	lookup, max_lookup, addr_str);
	370	}
12e41d03 DL	371	return -1;
	372	}
	373
	374	if (lookup < 1) {
	375	/* this is the non-recursive lookup - save original metric/distance */
	376	route_metric = nexthop_tab[0].route_metric;
	377	protocol_distance = nexthop_tab[0].protocol_distance;
	378	}
	379
	380	/*
d8ba2f4a DS	381	* FIXME: Non-recursive nexthop ensured only for first ifindex.
	382	* However, recursive route lookup should really be fixed in zebra daemon.
	383	* See also TODO T24.
	384	*
	385	* So Zebra for NEXTHOP_TYPE_IPV4 returns the ifindex now since
	386	* it was being stored. This Doesn't solve all cases of
	387	* recursive lookup but for the most common types it does.
12e41d03 DL	388	*/
	389	first_ifindex = nexthop_tab[0].ifindex;
	390	nexthop_addr = nexthop_tab[0].nexthop_addr;
	391	if (first_ifindex > 0) {
	392	/* found: first ifindex is non-recursive nexthop */
	393
d5a0a629	394	if (lookup > 0) {
12e41d03	395	/* Report non-recursive success after first lookup */
d5a0a629	396	if (PIM_DEBUG_ZEBRA) {
eaa54bdb	397	char addr_str[INET_ADDRSTRLEN];
d5a0a629 DS	398	pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str));
	399	zlog_debug("%s %s: lookup=%d/%d: found non-recursive ifindex=%d for address %s dist=%d met=%d",
	400	__FILE__, __PRETTY_FUNCTION__,
	401	lookup, max_lookup, first_ifindex, addr_str,
	402	nexthop_tab[0].protocol_distance,
	403	nexthop_tab[0].route_metric);
	404	}
12e41d03 DL	405
12e41d03 DL	406	/* use last address as nexthop address */
ba634917	407	nexthop_tab[0].nexthop_addr.u.prefix4 = addr;
12e41d03 DL	408
	409	/* report original route metric/distance */
	410	nexthop_tab[0].route_metric = route_metric;
	411	nexthop_tab[0].protocol_distance = protocol_distance;
	412	}
	413
	414	return num_ifindex;
	415	}
	416
7adf0260	417	if (PIM_DEBUG_ZEBRA) {
eaa54bdb DW	418	char addr_str[INET_ADDRSTRLEN];
eaa54bdb DW	419	char nexthop_str[PREFIX_STRLEN];
12e41d03	420	pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str));
ba634917	421	pim_addr_dump("<nexthop?>", &nexthop_addr, nexthop_str, sizeof(nexthop_str));
7adf0260	422	zlog_debug("%s %s: lookup=%d/%d: zebra returned recursive nexthop %s for address %s dist=%d met=%d",
12e41d03 DL	423	__FILE__, __PRETTY_FUNCTION__,
	424	lookup, max_lookup, nexthop_str, addr_str,
	425	nexthop_tab[0].protocol_distance,
	426	nexthop_tab[0].route_metric);
	427	}
	428
ba634917	429	addr = nexthop_addr.u.prefix4; /* use nexthop addr for recursive lookup */
12e41d03 DL	430
	431	} /* for (max_lookup) */
	432
7adf0260	433	if (PIM_DEBUG_ZEBRA) {
eaa54bdb	434	char addr_str[INET_ADDRSTRLEN];
7adf0260 DS	435	pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str));
	436	zlog_warn("%s %s: lookup=%d/%d: failure searching recursive nexthop ifindex for address %s",
	437	__FILE__, __PRETTY_FUNCTION__,
	438	lookup, max_lookup, addr_str);
	439	}
12e41d03 DL	440
	441	return -2;
	442	}
05b0d0d0 DS	443
	444	void
	445	pim_zlookup_show_ip_multicast (struct vty *vty)
	446	{
	447	vty_out(vty, "Zclient lookup socket: ");
	448	if (zlookup) {
	449	vty_out(vty, "%d failures=%d%s", zlookup->sock,
	450	zlookup->fail, VTY_NEWLINE);
	451	}
	452	else {
	453	vty_out(vty, "<null zclient>%s", VTY_NEWLINE);
	454	}
	455	}
e3be0432 DS	456
	457	int
	458	pim_zlookup_sg_statistics (struct channel_oil *c_oil)
	459	{
	460	struct stream *s = zlookup->obuf;
	461	uint16_t command = 0;
	462	unsigned long long lastused;
	463	struct prefix_sg sg;
	464	int count = 0;
	465	int ret;
	466	struct interface *ifp = pim_if_find_by_vif_index (c_oil->oil.mfcc_parent);
	467
	468	if (PIM_DEBUG_ZEBRA)
c7b1183f DS	469	{
	470	struct prefix_sg more;
	471
	472	more.src = c_oil->oil.mfcc_origin;
	473	more.grp = c_oil->oil.mfcc_mcastgrp;
429a291b CS	474	zlog_debug ("Sending Request for New Channel Oil Information(%s) VIIF %d",
429a291b CS	475	pim_str_sg_dump (&more), c_oil->oil.mfcc_parent);
c7b1183f	476	}
e3be0432	477
d1b64e31 DS	478	if (!ifp)
	479	return -1;
	480
e3be0432 DS	481	stream_reset (s);
	482	zclient_create_header (s, ZEBRA_IPMR_ROUTE_STATS, VRF_DEFAULT);
	483	stream_put_in_addr (s, &c_oil->oil.mfcc_origin);
	484	stream_put_in_addr (s, &c_oil->oil.mfcc_mcastgrp);
	485	stream_putl (s, ifp->ifindex);
	486	stream_putw_at(s, 0, stream_get_endp(s));
	487
	488	count = stream_get_endp (s);
	489	ret = writen (zlookup->sock, s->data, count);
	490	if (ret <= 0)
	491	{
5f8fec87 DS	492	zlog_err("%s %s: writen() failure: %d writing to zclient lookup socket",
5f8fec87 DS	493	__FILE__, __PRETTY_FUNCTION__, errno);
e3be0432 DS	494	return -1;
	495	}
	496
	497	s = zlookup->ibuf;
	498
	499	while (command != ZEBRA_IPMR_ROUTE_STATS)
	500	{
	501	int err;
	502	uint16_t length = 0;
	503	vrf_id_t vrf_id;
	504	u_char marker;
	505	u_char version;
	506
	507	stream_reset (s);
	508	err = zclient_read_header (s, zlookup->sock, &length, &marker, &version,
	509	&vrf_id, &command);
	510	if (err < 0)
	511	{
	512	zlog_err ("%s %s: zclient_read_header() failed",
	513	__FILE__, __PRETTY_FUNCTION__);
	514	zclient_lookup_failed(zlookup);
	515	return -1;
	516	}
	517	}
	518
	519	sg.src.s_addr = stream_get_ipv4 (s);
	520	sg.grp.s_addr = stream_get_ipv4 (s);
	521	if (sg.src.s_addr != c_oil->oil.mfcc_origin.s_addr \|\|
	522	sg.grp.s_addr != c_oil->oil.mfcc_mcastgrp.s_addr)
	523	{
	524	zlog_err ("%s: Received wrong %s information",
	525	__PRETTY_FUNCTION__, pim_str_sg_dump (&sg));
	526	zclient_lookup_failed (zlookup);
	527	return -3;
	528	}
	529
	530	stream_get (&lastused, s, sizeof (lastused));
9a5aa742	531	ret = stream_getl (s);
e3be0432	532
8d63c2d9	533	if (PIM_DEBUG_ZEBRA)
9a5aa742	534	zlog_debug ("Received %lld for %s success: %d", lastused, pim_str_sg_dump (&sg), ret);
e3be0432 DS	535
	536	c_oil->cc.lastused = lastused;
	537
	538	return 0;
	539
	540	}