lib/zebra.h - quagga - Gitiles

 /* Zebra common header.
    Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Kunihiro Ishiguro

 This file is part of GNU Zebra.

 GNU Zebra 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, or (at your option) any
 later version.

 GNU Zebra 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 GNU Zebra; see the file COPYING.  If not, write to the Free
 Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 02111-1307, USA.  */

 #ifndef _ZEBRA_H
 #define _ZEBRA_H

 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif /* HAVE_CONFIG_H */

 #ifdef SUNOS_5
 #define _XPG4_2
 typedef unsigned int    u_int32_t;
 typedef unsigned short  u_int16_t;
 typedef unsigned char   u_int8_t;
 #endif /* SUNOS_5 */

 #ifndef HAVE_SOCKLEN_T
 typedef int socklen_t;
 #endif /* HAVE_SOCKLEN_T */

 #include <unistd.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <stddef.h>
 #include <ctype.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <signal.h>
 #include <string.h>
 #include <pwd.h>
 #include <grp.h>
 #ifdef HAVE_STROPTS_H
 #include <stropts.h>
 #endif /* HAVE_STROPTS_H */
 #ifdef HAVE_SYS_SELECT_H
 #include <sys/select.h>
 #endif /* HAVE_SYS_SELECT_H */
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <sys/param.h>
 #ifdef HAVE_SYS_SYSCTL_H
 #ifdef GNU_LINUX
 #include <linux/types.h>
 #endif
 #include <sys/sysctl.h>
 #endif /* HAVE_SYS_SYSCTL_H */
 #include <sys/ioctl.h>
 #ifdef HAVE_SYS_CONF_H
 #include <sys/conf.h>
 #endif /* HAVE_SYS_CONF_H */
 #ifdef HAVE_SYS_KSYM_H
 #include <sys/ksym.h>
 #endif /* HAVE_SYS_KSYM_H */
 #include <syslog.h>
 #ifdef TIME_WITH_SYS_TIME
 # include <sys/time.h>
 # include <time.h>
 #else
 # ifdef HAVE_SYS_TIME_H
 #  include <sys/time.h>
 # else
 #  include <time.h>
 # endif
 #endif /* TIME_WITH_SYS_TIME */
 #include <sys/uio.h>
 #include <sys/utsname.h>
 #ifdef HAVE_RUSAGE
 #include <sys/resource.h>
 #endif /* HAVE_RUSAGE */
 #ifdef HAVE_LIMITS_H
 #include <limits.h>
 #endif /* HAVE_LIMITS_H */
 #ifdef HAVE_INTTYPES_H
 #include <inttypes.h>
 #endif /* HAVE_INTTYPES_H */
 #ifdef HAVE_STDBOOL_H
 #include <stdbool.h>
 #endif

 /* machine dependent includes */
 #ifdef SUNOS_5
 #include <strings.h>
 #endif /* SUNOS_5 */

 /* machine dependent includes */
 #ifdef HAVE_LINUX_VERSION_H
 #include <linux/version.h>
 #endif /* HAVE_LINUX_VERSION_H */

 #ifdef HAVE_ASM_TYPES_H
 #include <asm/types.h>
 #endif /* HAVE_ASM_TYPES_H */

 /* misc include group */
 #include <stdarg.h>
 #if !(defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L)
 /* Not C99; do we need to define va_copy? */
 #ifndef va_copy
 #ifdef __va_copy
 #define va_copy(DST,SRC) __va_copy(DST,SRC)
 #else
 /* Now we are desperate; this should work on many typical platforms.
    But this is slightly dangerous, because the standard does not require
    va_copy to be a macro. */
 #define va_copy(DST,SRC) memcpy(&(DST), &(SRC), sizeof(va_list))
 #warning "Not C99 and no va_copy macro available, falling back to memcpy"
 #endif /* __va_copy */
 #endif /* !va_copy */
 #endif /* !C99 */


 #ifdef HAVE_LCAPS
 #include <sys/capability.h>
 #include <sys/prctl.h>
 #endif /* HAVE_LCAPS */

 #ifdef HAVE_SOLARIS_CAPABILITIES
 #include <priv.h>
 #endif /* HAVE_SOLARIS_CAPABILITIES */

 /* network include group */

 #include <sys/socket.h>

 #ifdef HAVE_SYS_SOCKIO_H
 #include <sys/sockio.h>
 #endif /* HAVE_SYS_SOCKIO_H */

 #ifdef __APPLE__
 #define __APPLE_USE_RFC_3542
 #endif

 #ifdef HAVE_NETINET_IN_H
 #include <netinet/in.h>
 #endif /* HAVE_NETINET_IN_H */
 #include <netinet/in_systm.h>
 #include <netinet/ip.h>
 #include <netinet/tcp.h>

 #ifdef HAVE_NET_NETOPT_H
 #include <net/netopt.h>
 #endif /* HAVE_NET_NETOPT_H */

 #include <net/if.h>

 #ifdef HAVE_NET_IF_DL_H
 #include <net/if_dl.h>
 #endif /* HAVE_NET_IF_DL_H */

 #ifdef HAVE_NET_IF_VAR_H
 #include <net/if_var.h>
 #endif /* HAVE_NET_IF_VAR_H */

 #ifdef HAVE_NET_ROUTE_H
 #include <net/route.h>
 #endif /* HAVE_NET_ROUTE_H */

 #ifdef HAVE_NETLINK
 #include <linux/netlink.h>
 #include <linux/rtnetlink.h>
 #include <linux/filter.h>
 #else
 #define RT_TABLE_MAIN		0
 #endif /* HAVE_NETLINK */

 #ifdef HAVE_NETDB_H
 #include <netdb.h>
 #endif /* HAVE_NETDB_H */

 #include <arpa/inet.h>

 #ifdef HAVE_INET_ND_H
 #include <inet/nd.h>
 #endif /* HAVE_INET_ND_H */

 #ifdef HAVE_NETINET_IN_VAR_H
 #include <netinet/in_var.h>
 #endif /* HAVE_NETINET_IN_VAR_H */

 #ifdef HAVE_NETINET6_IN6_VAR_H
 #include <netinet6/in6_var.h>
 #endif /* HAVE_NETINET6_IN6_VAR_H */

 #ifdef HAVE_NETINET_IN6_VAR_H
 #include <netinet/in6_var.h>
 #endif /* HAVE_NETINET_IN6_VAR_H */

 #ifdef HAVE_NETINET6_IN_H
 #include <netinet6/in.h>
 #endif /* HAVE_NETINET6_IN_H */


 #ifdef HAVE_NETINET6_IP6_H
 #include <netinet6/ip6.h>
 #endif /* HAVE_NETINET6_IP6_H */

 #ifdef HAVE_NETINET_ICMP6_H
 #include <netinet/icmp6.h>
 #endif /* HAVE_NETINET_ICMP6_H */

 #ifdef HAVE_NETINET6_ND6_H
 #include <netinet6/nd6.h>
 #endif /* HAVE_NETINET6_ND6_H */

 /* Some systems do not define UINT32_MAX, etc.. from inttypes.h
  * e.g. this makes life easier for FBSD 4.11 users.
  */
 #ifndef INT8_MAX
 #define INT8_MAX	(127)
 #endif
 #ifndef INT16_MAX
 #define INT16_MAX	(32767)
 #endif
 #ifndef INT32_MAX
 #define INT32_MAX	(2147483647)
 #endif
 #ifndef UINT8_MAX
 #define UINT8_MAX	(255U)
 #endif
 #ifndef UINT16_MAX
 #define UINT16_MAX	(65535U)
 #endif
 #ifndef UINT32_MAX
 #define UINT32_MAX	(4294967295U)
 #endif

 #ifdef HAVE_GLIBC_BACKTRACE
 #include <execinfo.h>
 #endif /* HAVE_GLIBC_BACKTRACE */

 /* Local includes: */
 #if !(defined(__GNUC__) || defined(VTYSH_EXTRACT_PL))
 #define __attribute__(x)
 #endif  /* !__GNUC__ || VTYSH_EXTRACT_PL */

 #include "zassert.h"
 #include "str.h"


 #ifdef HAVE_BROKEN_CMSG_FIRSTHDR
 /* This bug is present in Solaris 8 and pre-patch Solaris 9 <sys/socket.h>;
    please refer to http://bugzilla.quagga.net/show_bug.cgi?id=142 */

 /* Check that msg_controllen is large enough. */
 #define ZCMSG_FIRSTHDR(mhdr) \
   (((size_t)((mhdr)->msg_controllen) >= sizeof(struct cmsghdr)) ? \
    CMSG_FIRSTHDR(mhdr) : (struct cmsghdr *)NULL)

 #warning "CMSG_FIRSTHDR is broken on this platform, using a workaround"

 #else /* HAVE_BROKEN_CMSG_FIRSTHDR */
 #define ZCMSG_FIRSTHDR(M) CMSG_FIRSTHDR(M)
 #endif /* HAVE_BROKEN_CMSG_FIRSTHDR */


 /*
  * RFC 3542 defines several macros for using struct cmsghdr.
  * Here, we define those that are not present
  */

 /*
  * Internal defines, for use only in this file.
  * These are likely wrong on other than ILP32 machines, so warn.
  */
 #ifndef _CMSG_DATA_ALIGN
 #define _CMSG_DATA_ALIGN(n)           (((n) + 3) & ~3)
 #endif /* _CMSG_DATA_ALIGN */

 #ifndef _CMSG_HDR_ALIGN
 #define _CMSG_HDR_ALIGN(n)            (((n) + 3) & ~3)
 #endif /* _CMSG_HDR_ALIGN */

 /*
  * CMSG_SPACE and CMSG_LEN are required in RFC3542, but were new in that
  * version.
  */
 #ifndef CMSG_SPACE
 #define CMSG_SPACE(l)       (_CMSG_DATA_ALIGN(sizeof(struct cmsghdr)) + \
                               _CMSG_HDR_ALIGN(l))
 #warning "assuming 4-byte alignment for CMSG_SPACE"
 #endif  /* CMSG_SPACE */


 #ifndef CMSG_LEN
 #define CMSG_LEN(l)         (_CMSG_DATA_ALIGN(sizeof(struct cmsghdr)) + (l))
 #warning "assuming 4-byte alignment for CMSG_LEN"
 #endif /* CMSG_LEN */


 /*  The definition of struct in_pktinfo is missing in old version of
     GLIBC 2.1 (Redhat 6.1).  */
 #if defined (GNU_LINUX) && ! defined (HAVE_STRUCT_IN_PKTINFO)
 struct in_pktinfo
 {
   int ipi_ifindex;
   struct in_addr ipi_spec_dst;
   struct in_addr ipi_addr;
 };
 #endif

 /*
  * OSPF Fragmentation / fragmented writes
  *
  * ospfd can support writing fragmented packets, for cases where
  * kernel will not fragment IP_HDRINCL and/or multicast destined
  * packets (ie TTBOMK all kernels, BSD, SunOS, Linux). However,
  * SunOS, probably BSD too, clobber the user supplied IP ID and IP
  * flags fields, hence user-space fragmentation will not work.
  * Only Linux is known to leave IP header unmolested.
  * Further, fragmentation really should be done the kernel, which already
  * supports it, and which avoids nasty IP ID state problems.
  *
  * Fragmentation of OSPF packets can be required on networks with router
  * with many many interfaces active in one area, or on networks with links
  * with low MTUs.
  */
 #ifdef GNU_LINUX
 #define WANT_OSPF_WRITE_FRAGMENT
 #endif

 /*
  * IP_HDRINCL / struct ip byte order
  *
  * Linux: network byte order
  * *BSD: network, except for length and offset. (cf Stevens)
  * SunOS: nominally as per BSD. but bug: network order on LE.
  * OpenBSD: network byte order, apart from older versions which are as per
  *          *BSD
  */
 #if defined(__NetBSD__) \
    || (defined(__FreeBSD__) && (__FreeBSD_version < 1100030)) \
    || (defined(__OpenBSD__) && (OpenBSD < 200311)) \
    || (defined(__APPLE__)) \
    || (defined(SUNOS_5) && defined(WORDS_BIGENDIAN))
 #define HAVE_IP_HDRINCL_BSD_ORDER
 #endif

 /* Define BYTE_ORDER, if not defined. Useful for compiler conditional
  * code, rather than preprocessor conditional.
  * Not all the world has this BSD define.
  */
 #ifndef BYTE_ORDER
 #define BIG_ENDIAN	4321	/* least-significant byte first (vax, pc) */
 #define LITTLE_ENDIAN	1234	/* most-significant byte first (IBM, net) */
 #define PDP_ENDIAN	3412	/* LSB first in word, MSW first in long (pdp) */

 #if defined(WORDS_BIGENDIAN)
 #define BYTE_ORDER	BIG_ENDIAN
 #else /* !WORDS_BIGENDIAN */
 #define BYTE_ORDER	LITTLE_ENDIAN
 #endif /* WORDS_BIGENDIAN */

 #endif /* ndef BYTE_ORDER */

 /* MAX / MIN are not commonly defined, but useful */
 #ifndef MAX
 #define MAX(a, b) ((a) > (b) ? (a) : (b))
 #endif
 #ifndef MIN
 #define MIN(a, b) ((a) < (b) ? (a) : (b))
 #endif

 #define ZEBRA_NUM_OF(x) (sizeof (x) / sizeof (x[0]))

 /* For old definition. */
 #ifndef IN6_ARE_ADDR_EQUAL
 #define IN6_ARE_ADDR_EQUAL IN6_IS_ADDR_EQUAL
 #endif /* IN6_ARE_ADDR_EQUAL */

 /* default zebra TCP port for zclient */
 #define ZEBRA_PORT			2600

 /* Zebra message types. */
 #define ZEBRA_INTERFACE_ADD                1
 #define ZEBRA_INTERFACE_DELETE             2
 #define ZEBRA_INTERFACE_ADDRESS_ADD        3
 #define ZEBRA_INTERFACE_ADDRESS_DELETE     4
 #define ZEBRA_INTERFACE_UP                 5
 #define ZEBRA_INTERFACE_DOWN               6
 #define ZEBRA_IPV4_ROUTE_ADD               7
 #define ZEBRA_IPV4_ROUTE_DELETE            8
 #define ZEBRA_IPV6_ROUTE_ADD               9
 #define ZEBRA_IPV6_ROUTE_DELETE           10
 #define ZEBRA_REDISTRIBUTE_ADD            11
 #define ZEBRA_REDISTRIBUTE_DELETE         12
 #define ZEBRA_REDISTRIBUTE_DEFAULT_ADD    13
 #define ZEBRA_REDISTRIBUTE_DEFAULT_DELETE 14
 #define ZEBRA_IPV4_NEXTHOP_LOOKUP         15
 #define ZEBRA_IPV6_NEXTHOP_LOOKUP         16
 #define ZEBRA_IPV4_IMPORT_LOOKUP          17
 #define ZEBRA_IPV6_IMPORT_LOOKUP          18
 #define ZEBRA_INTERFACE_RENAME            19
 #define ZEBRA_ROUTER_ID_ADD               20
 #define ZEBRA_ROUTER_ID_DELETE            21
 #define ZEBRA_ROUTER_ID_UPDATE            22
 #define ZEBRA_HELLO                       23
 #define ZEBRA_IPV4_NEXTHOP_LOOKUP_MRIB    24
 #define ZEBRA_VRF_UNREGISTER              25
 #define ZEBRA_MESSAGE_MAX                 26

 /* Marker value used in new Zserv, in the byte location corresponding
  * the command value in the old zserv header. To allow old and new
  * Zserv headers to be distinguished from each other.
  */
 #define ZEBRA_HEADER_MARKER              255

 /* Zebra route's types are defined in route_types.h */
 #include "route_types.h"

 /* Note: whenever a new route-type or zserv-command is added the
  * corresponding {command,route}_types[] table in lib/log.c MUST be
  * updated! */

 /* Map a route type to a string.  For example, ZEBRA_ROUTE_RIPNG -> "ripng". */
 extern const char *zebra_route_string(unsigned int route_type);
 /* Map a route type to a char.  For example, ZEBRA_ROUTE_RIPNG -> 'R'. */
 extern char zebra_route_char(unsigned int route_type);
 /* Map a zserv command type to the same string,
  * e.g. ZEBRA_INTERFACE_ADD -> "ZEBRA_INTERFACE_ADD" */
 /* Map a protocol name to its number. e.g. ZEBRA_ROUTE_BGP->9*/
 extern int proto_name2num(const char *s);
 /* Map redistribute X argument to protocol number.
  * unlike proto_name2num, this accepts shorthands and takes
  * an AFI value to restrict input */
 extern int proto_redistnum(int afi, const char *s);

 extern const char *zserv_command_string (unsigned int command);

 /* Error codes of zebra. */
 #define ZEBRA_ERR_NOERROR                0
 #define ZEBRA_ERR_RTEXIST               -1
 #define ZEBRA_ERR_RTUNREACH             -2
 #define ZEBRA_ERR_EPERM                 -3
 #define ZEBRA_ERR_RTNOEXIST             -4
 #define ZEBRA_ERR_KERNEL                -5

 /* Zebra message flags */
 #define ZEBRA_FLAG_INTERNAL           0x01
 #define ZEBRA_FLAG_SELFROUTE          0x02
 #define ZEBRA_FLAG_BLACKHOLE          0x04
 #define ZEBRA_FLAG_IBGP               0x08
 #define ZEBRA_FLAG_SELECTED           0x10
 #define ZEBRA_FLAG_STATIC             0x40
 #define ZEBRA_FLAG_REJECT             0x80

 /* Zebra nexthop flags. */
 #define ZEBRA_NEXTHOP_IFINDEX            1
 #define ZEBRA_NEXTHOP_IFNAME             2
 #define ZEBRA_NEXTHOP_IPV4               3
 #define ZEBRA_NEXTHOP_IPV4_IFINDEX       4
 #define ZEBRA_NEXTHOP_IPV4_IFNAME        5
 #define ZEBRA_NEXTHOP_IPV6               6
 #define ZEBRA_NEXTHOP_IPV6_IFINDEX       7
 #define ZEBRA_NEXTHOP_IPV6_IFNAME        8
 #define ZEBRA_NEXTHOP_BLACKHOLE          9

 #ifndef INADDR_LOOPBACK
 #define	INADDR_LOOPBACK	0x7f000001	/* Internet address 127.0.0.1.  */
 #endif

 /* Address family numbers from RFC1700. */
 typedef enum {
   AFI_IP  = 1,
   AFI_IP6 = 2,
 #define AFI_MAX 3
 } afi_t;

 /* Subsequent Address Family Identifier. */
 #define SAFI_UNICAST              1
 #define SAFI_MULTICAST            2
 #define SAFI_RESERVED_3           3
 #define SAFI_MPLS_VPN             4
 #define SAFI_MAX                  5

 /* Default Administrative Distance of each protocol. */
 #define ZEBRA_KERNEL_DISTANCE_DEFAULT      0
 #define ZEBRA_CONNECT_DISTANCE_DEFAULT     0
 #define ZEBRA_STATIC_DISTANCE_DEFAULT      1
 #define ZEBRA_RIP_DISTANCE_DEFAULT       120
 #define ZEBRA_RIPNG_DISTANCE_DEFAULT     120
 #define ZEBRA_OSPF_DISTANCE_DEFAULT      110
 #define ZEBRA_OSPF6_DISTANCE_DEFAULT     110
 #define ZEBRA_ISIS_DISTANCE_DEFAULT      115
 #define ZEBRA_IBGP_DISTANCE_DEFAULT      200
 #define ZEBRA_EBGP_DISTANCE_DEFAULT       20

 /* Flag manipulation macros. */
 #define CHECK_FLAG(V,F)      ((V) & (F))
 #define SET_FLAG(V,F)        (V) |= (F)
 #define UNSET_FLAG(V,F)      (V) &= ~(F)

 typedef u_int8_t safi_t;

 /* Zebra types. Used in Zserv message header. */
 typedef u_int16_t zebra_size_t;
 typedef u_int16_t zebra_command_t;

 /* VRF ID type. */
 typedef u_int16_t vrf_id_t;

 /* FIFO -- first in first out structure and macros.  */
 struct fifo
 {
   struct fifo *next;
   struct fifo *prev;
 };

 #define FIFO_INIT(F)                                  \
   do {                                                \
     struct fifo *Xfifo = (struct fifo *)(F);          \
     Xfifo->next = Xfifo->prev = Xfifo;                \
   } while (0)

 #define FIFO_ADD(F,N)                                 \
   do {                                                \
     struct fifo *Xfifo = (struct fifo *)(F);          \
     struct fifo *Xnode = (struct fifo *)(N);          \
     Xnode->next = Xfifo;                              \
     Xnode->prev = Xfifo->prev;                        \
     Xfifo->prev = Xfifo->prev->next = Xnode;          \
   } while (0)

 #define FIFO_DEL(N)                                   \
   do {                                                \
     struct fifo *Xnode = (struct fifo *)(N);          \
     Xnode->prev->next = Xnode->next;                  \
     Xnode->next->prev = Xnode->prev;                  \
   } while (0)

 #define FIFO_HEAD(F)                                  \
   ((((struct fifo *)(F))->next == (struct fifo *)(F)) \
   ? NULL : (F)->next)

 #define FIFO_EMPTY(F)                                 \
   (((struct fifo *)(F))->next == (struct fifo *)(F))

 #define FIFO_TOP(F)                                   \
   (FIFO_EMPTY(F) ? NULL : ((struct fifo *)(F))->next)

 #endif /* _ZEBRA_H */
	/* Zebra common header.
	Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Kunihiro Ishiguro

	This file is part of GNU Zebra.

	GNU Zebra 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, or (at your option) any
	later version.

	GNU Zebra 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 GNU Zebra; see the file COPYING. If not, write to the Free
	Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
	02111-1307, USA. */

	#ifndef _ZEBRA_H
	#define _ZEBRA_H

	#ifdef HAVE_CONFIG_H
	#include "config.h"
	#endif /* HAVE_CONFIG_H */

	#ifdef SUNOS_5
	#define _XPG4_2
	typedef unsigned int u_int32_t;
	typedef unsigned short u_int16_t;
	typedef unsigned char u_int8_t;
	#endif /* SUNOS_5 */

	#ifndef HAVE_SOCKLEN_T
	typedef int socklen_t;
	#endif /* HAVE_SOCKLEN_T */

	#include <unistd.h>
	#include <stdio.h>
	#include <stdlib.h>
	#include <stddef.h>
	#include <ctype.h>
	#include <errno.h>
	#include <fcntl.h>
	#include <signal.h>
	#include <string.h>
	#include <pwd.h>
	#include <grp.h>
	#ifdef HAVE_STROPTS_H
	#include <stropts.h>
	#endif /* HAVE_STROPTS_H */
	#ifdef HAVE_SYS_SELECT_H
	#include <sys/select.h>
	#endif /* HAVE_SYS_SELECT_H */
	#include <sys/stat.h>
	#include <sys/types.h>
	#include <sys/param.h>
	#ifdef HAVE_SYS_SYSCTL_H
	#ifdef GNU_LINUX
	#include <linux/types.h>
	#endif
	#include <sys/sysctl.h>
	#endif /* HAVE_SYS_SYSCTL_H */
	#include <sys/ioctl.h>
	#ifdef HAVE_SYS_CONF_H
	#include <sys/conf.h>
	#endif /* HAVE_SYS_CONF_H */
	#ifdef HAVE_SYS_KSYM_H
	#include <sys/ksym.h>
	#endif /* HAVE_SYS_KSYM_H */
	#include <syslog.h>
	#ifdef TIME_WITH_SYS_TIME
	# include <sys/time.h>
	# include <time.h>
	#else
	# ifdef HAVE_SYS_TIME_H
	# include <sys/time.h>
	# else
	# include <time.h>
	# endif
	#endif /* TIME_WITH_SYS_TIME */
	#include <sys/uio.h>
	#include <sys/utsname.h>
	#ifdef HAVE_RUSAGE
	#include <sys/resource.h>
	#endif /* HAVE_RUSAGE */
	#ifdef HAVE_LIMITS_H
	#include <limits.h>
	#endif /* HAVE_LIMITS_H */
	#ifdef HAVE_INTTYPES_H
	#include <inttypes.h>
	#endif /* HAVE_INTTYPES_H */
	#ifdef HAVE_STDBOOL_H
	#include <stdbool.h>
	#endif

	/* machine dependent includes */
	#ifdef SUNOS_5
	#include <strings.h>
	#endif /* SUNOS_5 */

	/* machine dependent includes */
	#ifdef HAVE_LINUX_VERSION_H
	#include <linux/version.h>
	#endif /* HAVE_LINUX_VERSION_H */

	#ifdef HAVE_ASM_TYPES_H
	#include <asm/types.h>
	#endif /* HAVE_ASM_TYPES_H */

	/* misc include group */
	#include <stdarg.h>
	#if !(defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L)
	/* Not C99; do we need to define va_copy? */
	#ifndef va_copy
	#ifdef __va_copy
	#define va_copy(DST,SRC) __va_copy(DST,SRC)
	#else
	/* Now we are desperate; this should work on many typical platforms.
	But this is slightly dangerous, because the standard does not require
	va_copy to be a macro. */
	#define va_copy(DST,SRC) memcpy(&(DST), &(SRC), sizeof(va_list))
	#warning "Not C99 and no va_copy macro available, falling back to memcpy"
	#endif /* __va_copy */
	#endif /* !va_copy */
	#endif /* !C99 */


	#ifdef HAVE_LCAPS
	#include <sys/capability.h>
	#include <sys/prctl.h>
	#endif /* HAVE_LCAPS */

	#ifdef HAVE_SOLARIS_CAPABILITIES
	#include <priv.h>
	#endif /* HAVE_SOLARIS_CAPABILITIES */

	/* network include group */

	#include <sys/socket.h>

	#ifdef HAVE_SYS_SOCKIO_H
	#include <sys/sockio.h>
	#endif /* HAVE_SYS_SOCKIO_H */

	#ifdef __APPLE__
	#define __APPLE_USE_RFC_3542
	#endif

	#ifdef HAVE_NETINET_IN_H
	#include <netinet/in.h>
	#endif /* HAVE_NETINET_IN_H */
	#include <netinet/in_systm.h>
	#include <netinet/ip.h>
	#include <netinet/tcp.h>

	#ifdef HAVE_NET_NETOPT_H
	#include <net/netopt.h>
	#endif /* HAVE_NET_NETOPT_H */

	#include <net/if.h>

	#ifdef HAVE_NET_IF_DL_H
	#include <net/if_dl.h>
	#endif /* HAVE_NET_IF_DL_H */

	#ifdef HAVE_NET_IF_VAR_H
	#include <net/if_var.h>
	#endif /* HAVE_NET_IF_VAR_H */

	#ifdef HAVE_NET_ROUTE_H
	#include <net/route.h>
	#endif /* HAVE_NET_ROUTE_H */

	#ifdef HAVE_NETLINK
	#include <linux/netlink.h>
	#include <linux/rtnetlink.h>
	#include <linux/filter.h>
	#else
	#define RT_TABLE_MAIN 0
	#endif /* HAVE_NETLINK */

	#ifdef HAVE_NETDB_H
	#include <netdb.h>
	#endif /* HAVE_NETDB_H */

	#include <arpa/inet.h>

	#ifdef HAVE_INET_ND_H
	#include <inet/nd.h>
	#endif /* HAVE_INET_ND_H */

	#ifdef HAVE_NETINET_IN_VAR_H
	#include <netinet/in_var.h>
	#endif /* HAVE_NETINET_IN_VAR_H */

	#ifdef HAVE_NETINET6_IN6_VAR_H
	#include <netinet6/in6_var.h>
	#endif /* HAVE_NETINET6_IN6_VAR_H */

	#ifdef HAVE_NETINET_IN6_VAR_H
	#include <netinet/in6_var.h>
	#endif /* HAVE_NETINET_IN6_VAR_H */

	#ifdef HAVE_NETINET6_IN_H
	#include <netinet6/in.h>
	#endif /* HAVE_NETINET6_IN_H */


	#ifdef HAVE_NETINET6_IP6_H
	#include <netinet6/ip6.h>
	#endif /* HAVE_NETINET6_IP6_H */

	#ifdef HAVE_NETINET_ICMP6_H
	#include <netinet/icmp6.h>
	#endif /* HAVE_NETINET_ICMP6_H */

	#ifdef HAVE_NETINET6_ND6_H
	#include <netinet6/nd6.h>
	#endif /* HAVE_NETINET6_ND6_H */

	/* Some systems do not define UINT32_MAX, etc.. from inttypes.h
	* e.g. this makes life easier for FBSD 4.11 users.
	*/
	#ifndef INT8_MAX
	#define INT8_MAX (127)
	#endif
	#ifndef INT16_MAX
	#define INT16_MAX (32767)
	#endif
	#ifndef INT32_MAX
	#define INT32_MAX (2147483647)
	#endif
	#ifndef UINT8_MAX
	#define UINT8_MAX (255U)
	#endif
	#ifndef UINT16_MAX
	#define UINT16_MAX (65535U)
	#endif
	#ifndef UINT32_MAX
	#define UINT32_MAX (4294967295U)
	#endif

	#ifdef HAVE_GLIBC_BACKTRACE
	#include <execinfo.h>
	#endif /* HAVE_GLIBC_BACKTRACE */

	/* Local includes: */
	#if !(defined(__GNUC__) \|\| defined(VTYSH_EXTRACT_PL))
	#define __attribute__(x)
	#endif /* !__GNUC__ \|\| VTYSH_EXTRACT_PL */

	#include "zassert.h"
	#include "str.h"


	#ifdef HAVE_BROKEN_CMSG_FIRSTHDR
	/* This bug is present in Solaris 8 and pre-patch Solaris 9 <sys/socket.h>;
	please refer to http://bugzilla.quagga.net/show_bug.cgi?id=142 */

	/* Check that msg_controllen is large enough. */
	#define ZCMSG_FIRSTHDR(mhdr) \
	(((size_t)((mhdr)->msg_controllen) >= sizeof(struct cmsghdr)) ? \
	CMSG_FIRSTHDR(mhdr) : (struct cmsghdr *)NULL)

	#warning "CMSG_FIRSTHDR is broken on this platform, using a workaround"

	#else /* HAVE_BROKEN_CMSG_FIRSTHDR */
	#define ZCMSG_FIRSTHDR(M) CMSG_FIRSTHDR(M)
	#endif /* HAVE_BROKEN_CMSG_FIRSTHDR */



	/*
	* RFC 3542 defines several macros for using struct cmsghdr.
	* Here, we define those that are not present
	*/

	/*
	* Internal defines, for use only in this file.
	* These are likely wrong on other than ILP32 machines, so warn.
	*/
	#ifndef _CMSG_DATA_ALIGN
	#define _CMSG_DATA_ALIGN(n) (((n) + 3) & ~3)
	#endif /* _CMSG_DATA_ALIGN */

	#ifndef _CMSG_HDR_ALIGN
	#define _CMSG_HDR_ALIGN(n) (((n) + 3) & ~3)
	#endif /* _CMSG_HDR_ALIGN */

	/*
	* CMSG_SPACE and CMSG_LEN are required in RFC3542, but were new in that
	* version.
	*/
	#ifndef CMSG_SPACE
	#define CMSG_SPACE(l) (_CMSG_DATA_ALIGN(sizeof(struct cmsghdr)) + \
	_CMSG_HDR_ALIGN(l))
	#warning "assuming 4-byte alignment for CMSG_SPACE"
	#endif /* CMSG_SPACE */


	#ifndef CMSG_LEN
	#define CMSG_LEN(l) (_CMSG_DATA_ALIGN(sizeof(struct cmsghdr)) + (l))
	#warning "assuming 4-byte alignment for CMSG_LEN"
	#endif /* CMSG_LEN */


	/* The definition of struct in_pktinfo is missing in old version of
	GLIBC 2.1 (Redhat 6.1). */
	#if defined (GNU_LINUX) && ! defined (HAVE_STRUCT_IN_PKTINFO)
	struct in_pktinfo
	{
	int ipi_ifindex;
	struct in_addr ipi_spec_dst;
	struct in_addr ipi_addr;
	};
	#endif

	/*
	* OSPF Fragmentation / fragmented writes
	*
	* ospfd can support writing fragmented packets, for cases where
	* kernel will not fragment IP_HDRINCL and/or multicast destined
	* packets (ie TTBOMK all kernels, BSD, SunOS, Linux). However,
	* SunOS, probably BSD too, clobber the user supplied IP ID and IP
	* flags fields, hence user-space fragmentation will not work.
	* Only Linux is known to leave IP header unmolested.
	* Further, fragmentation really should be done the kernel, which already
	* supports it, and which avoids nasty IP ID state problems.
	*
	* Fragmentation of OSPF packets can be required on networks with router
	* with many many interfaces active in one area, or on networks with links
	* with low MTUs.
	*/
	#ifdef GNU_LINUX
	#define WANT_OSPF_WRITE_FRAGMENT
	#endif

	/*
	* IP_HDRINCL / struct ip byte order
	*
	* Linux: network byte order
	* *BSD: network, except for length and offset. (cf Stevens)
	* SunOS: nominally as per BSD. but bug: network order on LE.
	* OpenBSD: network byte order, apart from older versions which are as per
	* *BSD
	*/
	#if defined(__NetBSD__) \
	\|\| (defined(__FreeBSD__) && (__FreeBSD_version < 1100030)) \
	\|\| (defined(__OpenBSD__) && (OpenBSD < 200311)) \
	\|\| (defined(__APPLE__)) \
	\|\| (defined(SUNOS_5) && defined(WORDS_BIGENDIAN))
	#define HAVE_IP_HDRINCL_BSD_ORDER
	#endif

	/* Define BYTE_ORDER, if not defined. Useful for compiler conditional
	* code, rather than preprocessor conditional.
	* Not all the world has this BSD define.
	*/
	#ifndef BYTE_ORDER
	#define BIG_ENDIAN 4321 /* least-significant byte first (vax, pc) */
	#define LITTLE_ENDIAN 1234 /* most-significant byte first (IBM, net) */
	#define PDP_ENDIAN 3412 /* LSB first in word, MSW first in long (pdp) */

	#if defined(WORDS_BIGENDIAN)
	#define BYTE_ORDER BIG_ENDIAN
	#else /* !WORDS_BIGENDIAN */
	#define BYTE_ORDER LITTLE_ENDIAN
	#endif /* WORDS_BIGENDIAN */

	#endif /* ndef BYTE_ORDER */

	/* MAX / MIN are not commonly defined, but useful */
	#ifndef MAX
	#define MAX(a, b) ((a) > (b) ? (a) : (b))
	#endif
	#ifndef MIN
	#define MIN(a, b) ((a) < (b) ? (a) : (b))
	#endif

	#define ZEBRA_NUM_OF(x) (sizeof (x) / sizeof (x[0]))

	/* For old definition. */
	#ifndef IN6_ARE_ADDR_EQUAL
	#define IN6_ARE_ADDR_EQUAL IN6_IS_ADDR_EQUAL
	#endif /* IN6_ARE_ADDR_EQUAL */

	/* default zebra TCP port for zclient */
	#define ZEBRA_PORT 2600

	/* Zebra message types. */
	#define ZEBRA_INTERFACE_ADD 1
	#define ZEBRA_INTERFACE_DELETE 2
	#define ZEBRA_INTERFACE_ADDRESS_ADD 3
	#define ZEBRA_INTERFACE_ADDRESS_DELETE 4
	#define ZEBRA_INTERFACE_UP 5
	#define ZEBRA_INTERFACE_DOWN 6
	#define ZEBRA_IPV4_ROUTE_ADD 7
	#define ZEBRA_IPV4_ROUTE_DELETE 8
	#define ZEBRA_IPV6_ROUTE_ADD 9
	#define ZEBRA_IPV6_ROUTE_DELETE 10
	#define ZEBRA_REDISTRIBUTE_ADD 11
	#define ZEBRA_REDISTRIBUTE_DELETE 12
	#define ZEBRA_REDISTRIBUTE_DEFAULT_ADD 13
	#define ZEBRA_REDISTRIBUTE_DEFAULT_DELETE 14
	#define ZEBRA_IPV4_NEXTHOP_LOOKUP 15
	#define ZEBRA_IPV6_NEXTHOP_LOOKUP 16
	#define ZEBRA_IPV4_IMPORT_LOOKUP 17
	#define ZEBRA_IPV6_IMPORT_LOOKUP 18
	#define ZEBRA_INTERFACE_RENAME 19
	#define ZEBRA_ROUTER_ID_ADD 20
	#define ZEBRA_ROUTER_ID_DELETE 21
	#define ZEBRA_ROUTER_ID_UPDATE 22
	#define ZEBRA_HELLO 23
	#define ZEBRA_IPV4_NEXTHOP_LOOKUP_MRIB 24
	#define ZEBRA_VRF_UNREGISTER 25
	#define ZEBRA_MESSAGE_MAX 26

	/* Marker value used in new Zserv, in the byte location corresponding
	* the command value in the old zserv header. To allow old and new
	* Zserv headers to be distinguished from each other.
	*/
	#define ZEBRA_HEADER_MARKER 255

	/* Zebra route's types are defined in route_types.h */
	#include "route_types.h"

	/* Note: whenever a new route-type or zserv-command is added the
	* corresponding {command,route}_types[] table in lib/log.c MUST be
	* updated! */

	/* Map a route type to a string. For example, ZEBRA_ROUTE_RIPNG -> "ripng". */
	extern const char *zebra_route_string(unsigned int route_type);
	/* Map a route type to a char. For example, ZEBRA_ROUTE_RIPNG -> 'R'. */
	extern char zebra_route_char(unsigned int route_type);
	/* Map a zserv command type to the same string,
	* e.g. ZEBRA_INTERFACE_ADD -> "ZEBRA_INTERFACE_ADD" */
	/* Map a protocol name to its number. e.g. ZEBRA_ROUTE_BGP->9*/
	extern int proto_name2num(const char *s);
	/* Map redistribute X argument to protocol number.
	* unlike proto_name2num, this accepts shorthands and takes
	* an AFI value to restrict input */
	extern int proto_redistnum(int afi, const char *s);

	extern const char *zserv_command_string (unsigned int command);

	/* Error codes of zebra. */
	#define ZEBRA_ERR_NOERROR 0
	#define ZEBRA_ERR_RTEXIST -1
	#define ZEBRA_ERR_RTUNREACH -2
	#define ZEBRA_ERR_EPERM -3
	#define ZEBRA_ERR_RTNOEXIST -4
	#define ZEBRA_ERR_KERNEL -5

	/* Zebra message flags */
	#define ZEBRA_FLAG_INTERNAL 0x01
	#define ZEBRA_FLAG_SELFROUTE 0x02
	#define ZEBRA_FLAG_BLACKHOLE 0x04
	#define ZEBRA_FLAG_IBGP 0x08
	#define ZEBRA_FLAG_SELECTED 0x10
	#define ZEBRA_FLAG_STATIC 0x40
	#define ZEBRA_FLAG_REJECT 0x80

	/* Zebra nexthop flags. */
	#define ZEBRA_NEXTHOP_IFINDEX 1
	#define ZEBRA_NEXTHOP_IFNAME 2
	#define ZEBRA_NEXTHOP_IPV4 3
	#define ZEBRA_NEXTHOP_IPV4_IFINDEX 4
	#define ZEBRA_NEXTHOP_IPV4_IFNAME 5
	#define ZEBRA_NEXTHOP_IPV6 6
	#define ZEBRA_NEXTHOP_IPV6_IFINDEX 7
	#define ZEBRA_NEXTHOP_IPV6_IFNAME 8
	#define ZEBRA_NEXTHOP_BLACKHOLE 9

	#ifndef INADDR_LOOPBACK
	#define INADDR_LOOPBACK 0x7f000001 /* Internet address 127.0.0.1. */
	#endif

	/* Address family numbers from RFC1700. */
	typedef enum {
	AFI_IP = 1,
	AFI_IP6 = 2,
	#define AFI_MAX 3
	} afi_t;

	/* Subsequent Address Family Identifier. */
	#define SAFI_UNICAST 1
	#define SAFI_MULTICAST 2
	#define SAFI_RESERVED_3 3
	#define SAFI_MPLS_VPN 4
	#define SAFI_MAX 5

	/* Default Administrative Distance of each protocol. */
	#define ZEBRA_KERNEL_DISTANCE_DEFAULT 0
	#define ZEBRA_CONNECT_DISTANCE_DEFAULT 0
	#define ZEBRA_STATIC_DISTANCE_DEFAULT 1
	#define ZEBRA_RIP_DISTANCE_DEFAULT 120
	#define ZEBRA_RIPNG_DISTANCE_DEFAULT 120
	#define ZEBRA_OSPF_DISTANCE_DEFAULT 110
	#define ZEBRA_OSPF6_DISTANCE_DEFAULT 110
	#define ZEBRA_ISIS_DISTANCE_DEFAULT 115
	#define ZEBRA_IBGP_DISTANCE_DEFAULT 200
	#define ZEBRA_EBGP_DISTANCE_DEFAULT 20

	/* Flag manipulation macros. */
	#define CHECK_FLAG(V,F) ((V) & (F))
	#define SET_FLAG(V,F) (V) \|= (F)
	#define UNSET_FLAG(V,F) (V) &= ~(F)

	typedef u_int8_t safi_t;

	/* Zebra types. Used in Zserv message header. */
	typedef u_int16_t zebra_size_t;
	typedef u_int16_t zebra_command_t;

	/* VRF ID type. */
	typedef u_int16_t vrf_id_t;

	/* FIFO -- first in first out structure and macros. */
	struct fifo
	{
	struct fifo *next;
	struct fifo *prev;
	};

	#define FIFO_INIT(F) \
	do { \
	struct fifo Xfifo = (struct fifo )(F); \
	Xfifo->next = Xfifo->prev = Xfifo; \
	} while (0)

	#define FIFO_ADD(F,N) \
	do { \
	struct fifo Xfifo = (struct fifo )(F); \
	struct fifo Xnode = (struct fifo )(N); \
	Xnode->next = Xfifo; \
	Xnode->prev = Xfifo->prev; \
	Xfifo->prev = Xfifo->prev->next = Xnode; \
	} while (0)

	#define FIFO_DEL(N) \
	do { \
	struct fifo Xnode = (struct fifo )(N); \
	Xnode->prev->next = Xnode->next; \
	Xnode->next->prev = Xnode->prev; \
	} while (0)

	#define FIFO_HEAD(F) \
	((((struct fifo )(F))->next == (struct fifo )(F)) \
	? NULL : (F)->next)

	#define FIFO_EMPTY(F) \
	(((struct fifo )(F))->next == (struct fifo )(F))

	#define FIFO_TOP(F) \
	(FIFO_EMPTY(F) ? NULL : ((struct fifo *)(F))->next)

	#endif /* _ZEBRA_H */