1: /* Zebra common header.
2: Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Kunihiro Ishiguro
3:
4: This file is part of GNU Zebra.
5:
6: GNU Zebra is free software; you can redistribute it and/or modify it
7: under the terms of the GNU General Public License as published by the
8: Free Software Foundation; either version 2, or (at your option) any
9: later version.
10:
11: GNU Zebra is distributed in the hope that it will be useful, but
12: WITHOUT ANY WARRANTY; without even the implied warranty of
13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14: General Public License for more details.
15:
16: You should have received a copy of the GNU General Public License
17: along with GNU Zebra; see the file COPYING. If not, write to the Free
18: Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
19: 02111-1307, USA. */
20:
21: #ifndef _ZEBRA_H
22: #define _ZEBRA_H
23:
24: #ifdef HAVE_CONFIG_H
25: #include "config.h"
26: #endif /* HAVE_CONFIG_H */
27:
28: #ifdef SUNOS_5
29: #define _XPG4_2
30: #define __EXTENSIONS__
31: typedef unsigned int u_int32_t;
32: typedef unsigned short u_int16_t;
33: typedef unsigned char u_int8_t;
34: #endif /* SUNOS_5 */
35:
36: #ifndef HAVE_SOCKLEN_T
37: typedef int socklen_t;
38: #endif /* HAVE_SOCKLEN_T */
39:
40: #include <unistd.h>
41: #include <stdio.h>
42: #include <stdlib.h>
43: #include <ctype.h>
44: #include <errno.h>
45: #include <fcntl.h>
46: #include <signal.h>
47: #include <string.h>
48: #include <pwd.h>
49: #include <grp.h>
50: #ifdef HAVE_STROPTS_H
51: #include <stropts.h>
52: #endif /* HAVE_STROPTS_H */
53: #include <sys/fcntl.h>
54: #ifdef HAVE_SYS_SELECT_H
55: #include <sys/select.h>
56: #endif /* HAVE_SYS_SELECT_H */
57: #include <sys/stat.h>
58: #include <sys/types.h>
59: #include <sys/param.h>
60: #ifdef HAVE_SYS_SYSCTL_H
61: #ifdef GNU_LINUX
62: #include <linux/types.h>
63: #endif
64: #include <sys/sysctl.h>
65: #endif /* HAVE_SYS_SYSCTL_H */
66: #include <sys/ioctl.h>
67: #ifdef HAVE_SYS_CONF_H
68: #include <sys/conf.h>
69: #endif /* HAVE_SYS_CONF_H */
70: #ifdef HAVE_SYS_KSYM_H
71: #include <sys/ksym.h>
72: #endif /* HAVE_SYS_KSYM_H */
73: #include <syslog.h>
74: #ifdef TIME_WITH_SYS_TIME
75: # include <sys/time.h>
76: # include <time.h>
77: #else
78: # ifdef HAVE_SYS_TIME_H
79: # include <sys/time.h>
80: # else
81: # include <time.h>
82: # endif
83: #endif /* TIME_WITH_SYS_TIME */
84: #include <sys/uio.h>
85: #include <sys/utsname.h>
86: #ifdef HAVE_RUSAGE
87: #include <sys/resource.h>
88: #endif /* HAVE_RUSAGE */
89: #ifdef HAVE_LIMITS_H
90: #include <limits.h>
91: #endif /* HAVE_LIMITS_H */
92: #ifdef HAVE_INTTYPES_H
93: #include <inttypes.h>
94: #endif /* HAVE_INTTYPES_H */
95:
96: /* machine dependent includes */
97: #ifdef SUNOS_5
98: #include <strings.h>
99: #endif /* SUNOS_5 */
100:
101: /* machine dependent includes */
102: #ifdef HAVE_LINUX_VERSION_H
103: #include <linux/version.h>
104: #endif /* HAVE_LINUX_VERSION_H */
105:
106: #ifdef HAVE_ASM_TYPES_H
107: #include <asm/types.h>
108: #endif /* HAVE_ASM_TYPES_H */
109:
110: /* misc include group */
111: #include <stdarg.h>
112: #if !(defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L)
113: /* Not C99; do we need to define va_copy? */
114: #ifndef va_copy
115: #ifdef __va_copy
116: #define va_copy(DST,SRC) __va_copy(DST,SRC)
117: #else
118: /* Now we are desperate; this should work on many typical platforms.
119: But this is slightly dangerous, because the standard does not require
120: va_copy to be a macro. */
121: #define va_copy(DST,SRC) memcpy(&(DST), &(SRC), sizeof(va_list))
122: #warning "Not C99 and no va_copy macro available, falling back to memcpy"
123: #endif /* __va_copy */
124: #endif /* !va_copy */
125: #endif /* !C99 */
126:
127:
128: #ifdef HAVE_LCAPS
129: #include <sys/capability.h>
130: #include <sys/prctl.h>
131: #endif /* HAVE_LCAPS */
132:
133: #ifdef HAVE_SOLARIS_CAPABILITIES
134: #include <priv.h>
135: #endif /* HAVE_SOLARIS_CAPABILITIES */
136:
137: /* network include group */
138:
139: #include <sys/socket.h>
140:
141: #ifdef HAVE_SYS_SOCKIO_H
142: #include <sys/sockio.h>
143: #endif /* HAVE_SYS_SOCKIO_H */
144:
145: #ifdef HAVE_NETINET_IN_H
146: #include <netinet/in.h>
147: #endif /* HAVE_NETINET_IN_H */
148: #include <netinet/in_systm.h>
149: #include <netinet/ip.h>
150: #include <netinet/tcp.h>
151:
152: #ifdef HAVE_NET_NETOPT_H
153: #include <net/netopt.h>
154: #endif /* HAVE_NET_NETOPT_H */
155:
156: #include <net/if.h>
157:
158: #ifdef HAVE_NET_IF_DL_H
159: #include <net/if_dl.h>
160: #endif /* HAVE_NET_IF_DL_H */
161:
162: #ifdef HAVE_NET_IF_VAR_H
163: #include <net/if_var.h>
164: #endif /* HAVE_NET_IF_VAR_H */
165:
166: #ifdef HAVE_NET_ROUTE_H
167: #include <net/route.h>
168: #endif /* HAVE_NET_ROUTE_H */
169:
170: #ifdef HAVE_NETLINK
171: #include <linux/netlink.h>
172: #include <linux/rtnetlink.h>
173: #include <linux/filter.h>
174: #include <stddef.h>
175: #else
176: #define RT_TABLE_MAIN 0
177: #endif /* HAVE_NETLINK */
178:
179: #ifdef HAVE_NETDB_H
180: #include <netdb.h>
181: #endif /* HAVE_NETDB_H */
182:
183: #include <arpa/inet.h>
184:
185: #ifdef HAVE_INET_ND_H
186: #include <inet/nd.h>
187: #endif /* HAVE_INET_ND_H */
188:
189: #ifdef HAVE_NETINET_IN_VAR_H
190: #include <netinet/in_var.h>
191: #endif /* HAVE_NETINET_IN_VAR_H */
192:
193: #ifdef HAVE_NETINET6_IN6_VAR_H
194: #include <netinet6/in6_var.h>
195: #endif /* HAVE_NETINET6_IN6_VAR_H */
196:
197: #ifdef HAVE_NETINET_IN6_VAR_H
198: #include <netinet/in6_var.h>
199: #endif /* HAVE_NETINET_IN6_VAR_H */
200:
201: #ifdef HAVE_NETINET6_IN_H
202: #include <netinet6/in.h>
203: #endif /* HAVE_NETINET6_IN_H */
204:
205:
206: #ifdef HAVE_NETINET6_IP6_H
207: #include <netinet6/ip6.h>
208: #endif /* HAVE_NETINET6_IP6_H */
209:
210: #ifdef HAVE_NETINET_ICMP6_H
211: #include <netinet/icmp6.h>
212: #endif /* HAVE_NETINET_ICMP6_H */
213:
214: #ifdef HAVE_NETINET6_ND6_H
215: #include <netinet6/nd6.h>
216: #endif /* HAVE_NETINET6_ND6_H */
217:
218: /* Some systems do not define UINT32_MAX, etc.. from inttypes.h
219: * e.g. this makes life easier for FBSD 4.11 users.
220: */
221: #ifndef INT8_MAX
222: #define INT8_MAX (127)
223: #endif
224: #ifndef INT16_MAX
225: #define INT16_MAX (32767)
226: #endif
227: #ifndef INT32_MAX
228: #define INT32_MAX (2147483647)
229: #endif
230: #ifndef UINT8_MAX
231: #define UINT8_MAX (255U)
232: #endif
233: #ifndef UINT16_MAX
234: #define UINT16_MAX (65535U)
235: #endif
236: #ifndef UINT32_MAX
237: #define UINT32_MAX (4294967295U)
238: #endif
239:
240: #ifdef HAVE_GLIBC_BACKTRACE
241: #include <execinfo.h>
242: #endif /* HAVE_GLIBC_BACKTRACE */
243:
244: #ifdef BSDI_NRL
245:
246: #ifdef HAVE_NETINET6_IN6_H
247: #include <netinet6/in6.h>
248: #endif /* HAVE_NETINET6_IN6_H */
249:
250: #ifdef NRL
251: #include <netinet6/in6.h>
252: #endif /* NRL */
253:
254: #define IN6_ARE_ADDR_EQUAL IN6_IS_ADDR_EQUAL
255:
256: #endif /* BSDI_NRL */
257:
258: /* Local includes: */
259: #if !(defined(__GNUC__) || defined(VTYSH_EXTRACT_PL))
260: #define __attribute__(x)
261: #endif /* !__GNUC__ || VTYSH_EXTRACT_PL */
262:
263: #include "zassert.h"
264: #include "str.h"
265:
266:
267: #ifdef HAVE_BROKEN_CMSG_FIRSTHDR
268: /* This bug is present in Solaris 8 and pre-patch Solaris 9 <sys/socket.h>;
269: please refer to http://bugzilla.quagga.net/show_bug.cgi?id=142 */
270:
271: /* Check that msg_controllen is large enough. */
272: #define ZCMSG_FIRSTHDR(mhdr) \
273: (((size_t)((mhdr)->msg_controllen) >= sizeof(struct cmsghdr)) ? \
274: CMSG_FIRSTHDR(mhdr) : (struct cmsghdr *)NULL)
275:
276: #warning "CMSG_FIRSTHDR is broken on this platform, using a workaround"
277:
278: #else /* HAVE_BROKEN_CMSG_FIRSTHDR */
279: #define ZCMSG_FIRSTHDR(M) CMSG_FIRSTHDR(M)
280: #endif /* HAVE_BROKEN_CMSG_FIRSTHDR */
281:
282:
283:
284: /*
285: * RFC 3542 defines several macros for using struct cmsghdr.
286: * Here, we define those that are not present
287: */
288:
289: /*
290: * Internal defines, for use only in this file.
291: * These are likely wrong on other than ILP32 machines, so warn.
292: */
293: #ifndef _CMSG_DATA_ALIGN
294: #define _CMSG_DATA_ALIGN(n) (((n) + 3) & ~3)
295: #endif /* _CMSG_DATA_ALIGN */
296:
297: #ifndef _CMSG_HDR_ALIGN
298: #define _CMSG_HDR_ALIGN(n) (((n) + 3) & ~3)
299: #endif /* _CMSG_HDR_ALIGN */
300:
301: /*
302: * CMSG_SPACE and CMSG_LEN are required in RFC3542, but were new in that
303: * version.
304: */
305: #ifndef CMSG_SPACE
306: #define CMSG_SPACE(l) (_CMSG_DATA_ALIGN(sizeof(struct cmsghdr)) + \
307: _CMSG_HDR_ALIGN(l))
308: #warning "assuming 4-byte alignment for CMSG_SPACE"
309: #endif /* CMSG_SPACE */
310:
311:
312: #ifndef CMSG_LEN
313: #define CMSG_LEN(l) (_CMSG_DATA_ALIGN(sizeof(struct cmsghdr)) + (l))
314: #warning "assuming 4-byte alignment for CMSG_LEN"
315: #endif /* CMSG_LEN */
316:
317:
318: /* The definition of struct in_pktinfo is missing in old version of
319: GLIBC 2.1 (Redhat 6.1). */
320: #if defined (GNU_LINUX) && ! defined (HAVE_STRUCT_IN_PKTINFO)
321: struct in_pktinfo
322: {
323: int ipi_ifindex;
324: struct in_addr ipi_spec_dst;
325: struct in_addr ipi_addr;
326: };
327: #endif
328:
329: /*
330: * OSPF Fragmentation / fragmented writes
331: *
332: * ospfd can support writing fragmented packets, for cases where
333: * kernel will not fragment IP_HDRINCL and/or multicast destined
334: * packets (ie TTBOMK all kernels, BSD, SunOS, Linux). However,
335: * SunOS, probably BSD too, clobber the user supplied IP ID and IP
336: * flags fields, hence user-space fragmentation will not work.
337: * Only Linux is known to leave IP header unmolested.
338: * Further, fragmentation really should be done the kernel, which already
339: * supports it, and which avoids nasty IP ID state problems.
340: *
341: * Fragmentation of OSPF packets can be required on networks with router
342: * with many many interfaces active in one area, or on networks with links
343: * with low MTUs.
344: */
345: #ifdef GNU_LINUX
346: #define WANT_OSPF_WRITE_FRAGMENT
347: #endif
348:
349: /*
350: * IP_HDRINCL / struct ip byte order
351: *
352: * Linux: network byte order
353: * *BSD: network, except for length and offset. (cf Stevens)
354: * SunOS: nominally as per BSD. but bug: network order on LE.
355: * OpenBSD: network byte order, apart from older versions which are as per
356: * *BSD
357: */
358: #if defined(__NetBSD__) || defined(__FreeBSD__) \
359: || (defined(__OpenBSD__) && (OpenBSD < 200311)) \
360: || (defined(SUNOS_5) && defined(WORDS_BIGENDIAN))
361: #define HAVE_IP_HDRINCL_BSD_ORDER
362: #endif
363:
364: /* Define BYTE_ORDER, if not defined. Useful for compiler conditional
365: * code, rather than preprocessor conditional.
366: * Not all the world has this BSD define.
367: */
368: #ifndef BYTE_ORDER
369: #define BIG_ENDIAN 4321 /* least-significant byte first (vax, pc) */
370: #define LITTLE_ENDIAN 1234 /* most-significant byte first (IBM, net) */
371: #define PDP_ENDIAN 3412 /* LSB first in word, MSW first in long (pdp) */
372:
373: #if defined(WORDS_BIGENDIAN)
374: #define BYTE_ORDER BIG_ENDIAN
375: #else /* !WORDS_BIGENDIAN */
376: #define BYTE_ORDER LITTLE_ENDIAN
377: #endif /* WORDS_BIGENDIAN */
378:
379: #endif /* ndef BYTE_ORDER */
380:
381: /* MAX / MIN are not commonly defined, but useful */
382: #ifndef MAX
383: #define MAX(a, b) ((a) > (b) ? (a) : (b))
384: #endif
385: #ifndef MIN
386: #define MIN(a, b) ((a) < (b) ? (a) : (b))
387: #endif
388:
389: /* For old definition. */
390: #ifndef IN6_ARE_ADDR_EQUAL
391: #define IN6_ARE_ADDR_EQUAL IN6_IS_ADDR_EQUAL
392: #endif /* IN6_ARE_ADDR_EQUAL */
393:
394: /* default zebra TCP port for zclient */
395: #define ZEBRA_PORT 2600
396:
397: /* Zebra message types. */
398: #define ZEBRA_INTERFACE_ADD 1
399: #define ZEBRA_INTERFACE_DELETE 2
400: #define ZEBRA_INTERFACE_ADDRESS_ADD 3
401: #define ZEBRA_INTERFACE_ADDRESS_DELETE 4
402: #define ZEBRA_INTERFACE_UP 5
403: #define ZEBRA_INTERFACE_DOWN 6
404: #define ZEBRA_IPV4_ROUTE_ADD 7
405: #define ZEBRA_IPV4_ROUTE_DELETE 8
406: #define ZEBRA_IPV6_ROUTE_ADD 9
407: #define ZEBRA_IPV6_ROUTE_DELETE 10
408: #define ZEBRA_REDISTRIBUTE_ADD 11
409: #define ZEBRA_REDISTRIBUTE_DELETE 12
410: #define ZEBRA_REDISTRIBUTE_DEFAULT_ADD 13
411: #define ZEBRA_REDISTRIBUTE_DEFAULT_DELETE 14
412: #define ZEBRA_IPV4_NEXTHOP_LOOKUP 15
413: #define ZEBRA_IPV6_NEXTHOP_LOOKUP 16
414: #define ZEBRA_IPV4_IMPORT_LOOKUP 17
415: #define ZEBRA_IPV6_IMPORT_LOOKUP 18
416: #define ZEBRA_INTERFACE_RENAME 19
417: #define ZEBRA_ROUTER_ID_ADD 20
418: #define ZEBRA_ROUTER_ID_DELETE 21
419: #define ZEBRA_ROUTER_ID_UPDATE 22
420: #define ZEBRA_MESSAGE_MAX 23
421:
422: /* Marker value used in new Zserv, in the byte location corresponding
423: * the command value in the old zserv header. To allow old and new
424: * Zserv headers to be distinguished from each other.
425: */
426: #define ZEBRA_HEADER_MARKER 255
427:
428: /* Zebra route's types. */
429: #define ZEBRA_ROUTE_SYSTEM 0
430: #define ZEBRA_ROUTE_KERNEL 1
431: #define ZEBRA_ROUTE_CONNECT 2
432: #define ZEBRA_ROUTE_STATIC 3
433: #define ZEBRA_ROUTE_RIP 4
434: #define ZEBRA_ROUTE_RIPNG 5
435: #define ZEBRA_ROUTE_OSPF 6
436: #define ZEBRA_ROUTE_OSPF6 7
437: #define ZEBRA_ROUTE_ISIS 8
438: #define ZEBRA_ROUTE_BGP 9
439: #define ZEBRA_ROUTE_HSLS 10
440: #define ZEBRA_ROUTE_MAX 11
441:
442: /* Note: whenever a new route-type or zserv-command is added the
443: * corresponding {command,route}_types[] table in lib/log.c MUST be
444: * updated! */
445:
446: /* Map a route type to a string. For example, ZEBRA_ROUTE_RIPNG -> "ripng". */
447: extern const char *zebra_route_string(unsigned int route_type);
448: /* Map a route type to a char. For example, ZEBRA_ROUTE_RIPNG -> 'R'. */
449: extern char zebra_route_char(unsigned int route_type);
450: /* Map a zserv command type to the same string,
451: * e.g. ZEBRA_INTERFACE_ADD -> "ZEBRA_INTERFACE_ADD" */
452: /* Map a protocol name to its number. e.g. ZEBRA_ROUTE_BGP->9*/
453: extern int proto_name2num(const char *s);
454:
455: extern const char *zserv_command_string (unsigned int command);
456:
457: /* Zebra's family types. */
458: #define ZEBRA_FAMILY_IPV4 1
459: #define ZEBRA_FAMILY_IPV6 2
460: #define ZEBRA_FAMILY_MAX 3
461:
462: /* Error codes of zebra. */
463: #define ZEBRA_ERR_NOERROR 0
464: #define ZEBRA_ERR_RTEXIST -1
465: #define ZEBRA_ERR_RTUNREACH -2
466: #define ZEBRA_ERR_EPERM -3
467: #define ZEBRA_ERR_RTNOEXIST -4
468: #define ZEBRA_ERR_KERNEL -5
469:
470: /* Zebra message flags */
471: #define ZEBRA_FLAG_INTERNAL 0x01
472: #define ZEBRA_FLAG_SELFROUTE 0x02
473: #define ZEBRA_FLAG_BLACKHOLE 0x04
474: #define ZEBRA_FLAG_IBGP 0x08
475: #define ZEBRA_FLAG_SELECTED 0x10
476: #define ZEBRA_FLAG_CHANGED 0x20
477: #define ZEBRA_FLAG_STATIC 0x40
478: #define ZEBRA_FLAG_REJECT 0x80
479:
480: /* Zebra nexthop flags. */
481: #define ZEBRA_NEXTHOP_IFINDEX 1
482: #define ZEBRA_NEXTHOP_IFNAME 2
483: #define ZEBRA_NEXTHOP_IPV4 3
484: #define ZEBRA_NEXTHOP_IPV4_IFINDEX 4
485: #define ZEBRA_NEXTHOP_IPV4_IFNAME 5
486: #define ZEBRA_NEXTHOP_IPV6 6
487: #define ZEBRA_NEXTHOP_IPV6_IFINDEX 7
488: #define ZEBRA_NEXTHOP_IPV6_IFNAME 8
489: #define ZEBRA_NEXTHOP_BLACKHOLE 9
490:
491: #ifndef INADDR_LOOPBACK
492: #define INADDR_LOOPBACK 0x7f000001 /* Internet address 127.0.0.1. */
493: #endif
494:
495: /* Address family numbers from RFC1700. */
496: #define AFI_IP 1
497: #define AFI_IP6 2
498: #define AFI_MAX 3
499:
500: /* Subsequent Address Family Identifier. */
501: #define SAFI_UNICAST 1
502: #define SAFI_MULTICAST 2
503: #define SAFI_UNICAST_MULTICAST 3
504: #define SAFI_MPLS_VPN 4
505: #define SAFI_MAX 5
506:
507: /* Filter direction. */
508: #define FILTER_IN 0
509: #define FILTER_OUT 1
510: #define FILTER_MAX 2
511:
512: /* Default Administrative Distance of each protocol. */
513: #define ZEBRA_KERNEL_DISTANCE_DEFAULT 0
514: #define ZEBRA_CONNECT_DISTANCE_DEFAULT 0
515: #define ZEBRA_STATIC_DISTANCE_DEFAULT 1
516: #define ZEBRA_RIP_DISTANCE_DEFAULT 120
517: #define ZEBRA_RIPNG_DISTANCE_DEFAULT 120
518: #define ZEBRA_OSPF_DISTANCE_DEFAULT 110
519: #define ZEBRA_OSPF6_DISTANCE_DEFAULT 110
520: #define ZEBRA_ISIS_DISTANCE_DEFAULT 115
521: #define ZEBRA_IBGP_DISTANCE_DEFAULT 200
522: #define ZEBRA_EBGP_DISTANCE_DEFAULT 20
523:
524: /* Flag manipulation macros. */
525: #define CHECK_FLAG(V,F) ((V) & (F))
526: #define SET_FLAG(V,F) (V) |= (F)
527: #define UNSET_FLAG(V,F) (V) &= ~(F)
528:
529: /* AFI and SAFI type. */
530: typedef u_int16_t afi_t;
531: typedef u_int8_t safi_t;
532:
533: /* Zebra types. Used in Zserv message header. */
534: typedef u_int16_t zebra_size_t;
535: typedef u_int16_t zebra_command_t;
536:
537: /* FIFO -- first in first out structure and macros. */
538: struct fifo
539: {
540: struct fifo *next;
541: struct fifo *prev;
542: };
543:
544: #define FIFO_INIT(F) \
545: do { \
546: struct fifo *Xfifo = (struct fifo *)(F); \
547: Xfifo->next = Xfifo->prev = Xfifo; \
548: } while (0)
549:
550: #define FIFO_ADD(F,N) \
551: do { \
552: struct fifo *Xfifo = (struct fifo *)(F); \
553: struct fifo *Xnode = (struct fifo *)(N); \
554: Xnode->next = Xfifo; \
555: Xnode->prev = Xfifo->prev; \
556: Xfifo->prev = Xfifo->prev->next = Xnode; \
557: } while (0)
558:
559: #define FIFO_DEL(N) \
560: do { \
561: struct fifo *Xnode = (struct fifo *)(N); \
562: Xnode->prev->next = Xnode->next; \
563: Xnode->next->prev = Xnode->prev; \
564: } while (0)
565:
566: #define FIFO_HEAD(F) \
567: ((((struct fifo *)(F))->next == (struct fifo *)(F)) \
568: ? NULL : (F)->next)
569:
570: #define FIFO_EMPTY(F) \
571: (((struct fifo *)(F))->next == (struct fifo *)(F))
572:
573: #define FIFO_TOP(F) \
574: (FIFO_EMPTY(F) ? NULL : ((struct fifo *)(F))->next)
575:
576: #endif /* _ZEBRA_H */
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